JPS6182316A - Cassette deck - Google Patents

Abstract

PURPOSE:To perform smooth reverse reproducing by using the same driving source for the first gear which drives a head base and the second gear which rotates a magnetic head and providing a turning control plate of the second gear with a projection which should be engaged with a stop pin of the second gear and providing a tooth omission part in the first gear. CONSTITUTION:The head base is so provided that is can be freely moved back and forth in the direction approximately orthogonal to the tape carrying direction, and a magnetic head is provided freely turnably on the head base. The head base is moved back and forth by a gear 33, and the head is rotated by the gear 34. A rotating force is given to gears 33 and 34 by the same motor, and a trigger means is so provided that the gear 34 is engaged with a transmission after the gear 33 is engaged with it. The trigger means is moved back and forth by turning of the gear 33 and is provided with the control plate which controls turning of the gear 34. The gear 34 is provide with stop pins 3a and 34b which should be engaged with the projection of the control plate and is provided with a tooth omission part 34c while eliminates an unnecessary time for reverse of the tape in the reproducing direction. Thus, a cassette deck is made small-sized, and smooth reverse reproducing is possible.

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to cassette decks. In recent years, there has been a trend toward smaller cassette decks, and in particular, the power of cassette decks for automobiles has increased.
Dec-1: There is a limit to the space that can be accommodated! Therefore, there is a strong demand for miniaturization. Also, when playing back, for example, a 4-track magnetic tape that has been recorded in both forward and reverse directions, when playback in one direction is completed, the force 1? Normally, it is done to change and replace Tsu[・Harno, but here is a solution to the troublesomeness of this replacement!
A device with a built-in reverse mechanism has been developed for the so-called Oi. As is well known, the A-triverse mechanism automatically runs the magnetic tape in reverse and sets the magnetic head to match the tracks in both forward and reverse directions. Various configurations have already been proposed for switching the magnetic head between forward and reverse directions. There are also formats that electrically switch the speed according to the forward and reverse running of the magnetic tape, and a two-way magnetic head.

There is a type in which the main body of the magnetic head is mechanically translated or rotated in accordance with the forward and reverse running of the tape. Among these various magnetic head switching formats,
A format in which the magnetic head is rotated is used because azimuth adjustment can be performed independently for both forward and reverse running of the magnetic tape, and therefore better reproduction frequency characteristics can be obtained compared to other formats. . In the magnetic head rotation type, the magnetic head is once moved in a direction substantially perpendicular to the tape transport direction to separate the magnetic head from the magnetic tape, and then rotated.Then, the magnetic head is then moved backwards to remove the magnetic head from the magnetic tape. Abutment is performed. In already developed cassette decks, there is a drive source for rotating the magnetic head, and a drive source for reciprocating the magnetic head in a direction substantially perpendicular to the tape transport direction, which is provided separately from the drive source. At least two drive sources are provided.Therefore, this has been a problem in reducing the size and cost of the entire cassette deck.Summary of the InventionThe present invention has been made in view of the above points. The purpose of the cassette deck is to provide a cassette deck that is easy to downsize as a whole and has a low cost.The cassette deck according to the present invention a head stand that is reciprocally movable in a direction substantially perpendicular to the head stand, and a magnetic head that is provided on the head stand so as to be rotatable between two angular positions about an axis that is substantially parallel to the direction of movement of the head stand; , a tape transport direction switching means that determines a tape transport direction corresponding to the angular position of the magnetic head; a head stand drive mechanism including a first gear that reciprocates the head stand by rotation; A head rotation mechanism includes a second gear that rotates the head, and a gear transmission mechanism that can mesh with the first and second gears, and applies rotational force from a single drive source to the first and second gears. and a rigging mechanism is provided so that the second gear meshes with the gear transmission mechanism after the first gear meshes with the gear transmission mechanism, The trigger means is provided so as to be able to reciprocate between the most forward movement position and the most backward movement position, and is caused to move forward by the rotation of the first gear, and when the trigger means is not in the most backward movement position, the trigger means is configured to strike the second gear. a control plate formed with a regulating portion that engages with a provided stop pin to regulate the rotation of the second gear; a biasing means that biases the control plate in a backward movement direction; a prohibiting means configured to prohibit the backward movement of the control plate when the forward movement position is reached and to release the prohibition by the initial movement of the first gear; a biasing means for biasing in a direction to mesh with the mechanism; the control plate is provided with a protrusion that engages with the stop pin; the stop pin also causes the control plate to move forward; The first gear is characterized in that a predetermined range of teeth are missing in a portion that should mesh with the gear transmission mechanism immediately after the first gear starts moving. 1-[-9 Hereinafter, a cassette deck as an embodiment of the present invention will be described with reference to the accompanying drawings. -〇- In the figure, reference line 1 indicates the entire casette 4-. As shown in FIG. 1, the front face of the housing 2 is provided with a rectangular and horizontally elongated opening 2a into which a cullet half (described later) is inserted. However, the term "forward" as used herein refers to the direction indicated by arrow Y in the figure, and the term "left and right direction" refers to the front direction. Therefore, the arrow X direction is to the left, and the arrow Z direction is upward. As shown in FIGS. 2 and 3, as well as FIGS. 9 and 10, inside the housing 2 is a chassis 3 made of a steel plate or the like.
is provided. As shown in FIG. 4, a pair of reel units 5 are arranged side by side in the front and back direction on the chassis 3, and are rotatably attached to the chassis. It is clear from J: sea urchin,
The reel unit 5 also has a rotating support shaft 5a fixed to the shafts 1/-3. A reel 5b is rotatably fitted onto the rotation support shaft 5a. One collar 50 and one bushing 5d are attached to each of the lower and lower ends of the reel 5b. The collar 5C can fit inside the reel that is installed in the cassette half and around which the magnetic tape is wound. A disk-shaped enlarged diameter portion 5e is formed in the center of the reel 51), and a double gear 5f having two large and small gear portions is disposed between the enlarged diameter portion and the bushing 5d. The opening is rotatably attached to the rotation support shaft 5a. A coil spring 5g is interposed between the double gear 5f and the bush 5d to urge the double gear and the bush 5d away from each other. Further, a felt plate 5h is provided between the enlarged diameter portion 5e of the reel 5b and the double gear 5f. The felt plate 5]1 is attached to the enlarged diameter portion 5e, and is in slidable contact with the double gear 5f. An arm 51 is provided between the first surface of the enlarged diameter portion 5C and the collar 50, and the reel 5b is disposed at one end of the arm 51.
It is rotatably attached to the outer periphery of the The lower and upper surfaces of the arm 51 are connected to the expanded diameter portion 5e of the reel 5b and the collar 5.
A spring 59 is disposed between the upper washer 5 and the arm 5i to bias the arm downward. As shown in FIGS. 2, 3, 9, and 10, an intermediate lever 7 is disposed on the right side of the reel unit 5 and extends approximately in the front-rear direction. J to 7a:
The chassis 11 and the chassis 3 are provided at an angle so as to be rotatable in a plane parallel to the main surface of the chassis. A rectangular opening 7b is formed at the end of the intermediate lever 7, and the central part of the floating lever 8, which is freely movably installed on the plate 3, is inserted into the opening. A pin 8a protruding from the reel unit 5 is loosely fitted into the movable lever 8. A pin 8b is protruded from both ends of the floating lever 8, and each pin is attached to a free end of the arm 51 of the reel unit 5. It is slidably engaged in the formed elongated hole 5m.As shown in FIGS. 7 and 18, an end detection lever 10 is disposed near the rear end of the intermediate lever 7. This second detection lever 10 is connected to a sub-chassis A that is fixedly installed on the upper surface of the rear end of the chassis 3 so as to protrude to one side.
A part of the pivoting end 9 of a lever A12 rotatably provided on the lever A11, in this case the right end of the lever A, is pivotally attached at its upper end. A projection 10a extending downward is provided at the lower end of the end detection lever 10.
The protrusion is a notch 7C formed at the rear end of the intermediate lever 7.
is slidably engaged with. As shown in FIGS. 7, 9, and 18, a pin 10b is provided protruding from the rear surface of the upper end of the end detection lever 10, and the pin is rotatably attached to the ribs P and A. take(
-1 and is engaged with the end detection gear 14 facing the rear end surface of the end detection lever 10. Figure 7 and 1
As is clear from FIG. 8, there are four parts 14. on the surface of the end detection gear 14 facing the end detection lever 10. A is formed on the circumferential side of the recessed portion, and substantially mountain-shaped protrusions tXll 14 b having the same shape and projecting in the radial direction of the end detection lever are formed on the circumferential side of the recess.
are provided at a pitch of 120°. In addition, each of the above-mentioned +Il-shaped container portions 14I is provided at the center of the four portions 14a.
Three protrusions 14c, each having the same shape, are formed that extend radially toward the valley between (). If a circle circumscribing the top of each protrusion 14b and a circle provided inside the top of each protrusion 14C are imagined, the diameters of these diameters are approximately the same. The bottle 10b protruding from the end detection lever 10 has these protrusions 14b and 14. c. The reel unit 5 described above, the intermediate lever 7, the floating lever 8, the end detection lever 10, and the end detection gear 1
4 constitutes a part of a tape end detection mechanism for detecting the end of the magnetic tape being played. As shown in FIG. 2, FIG. 7, FIG. 9, and FIG.
On the left side of 4 are four gears 16, 1.7 that mesh in series.
．． Gear transmission consisting of 18 and 19) Mechanism 20' IJ setting
The final stage gear 19 of the f mechanism is in mesh. As shown in FIG. 18, the first stage gear 16 of the gear transmission mechanism 20 (however, the reference numeral 20 is not shown in FIG. 18) is connected to a worm 22 rotatably attached to the subchassis A11.
They're meshing together. A pulley 23 is attached to the lower end of the worm 22.
are integrally formed. As shown in FIG. 10, the pulley 23 is rotationally driven via a belt 25 by a motor 24 located at the right rear end of the chassis 3. As shown in FIG. Note that the belt 25 is directly wound around a small pulley 24a fitted to the output shaft of the motor 24. As is clear from FIG. 10, the belt 25 is also passed around a pair of flywheels 27 that are rotatably provided on the lower surface of the chassis 3 and arranged one behind the other. However, the direction of rotation of the motor 24 is in the direction of arrow M, which is the forward rotation direction, whereas the pulley 23 is always rotated in the direction of arrow N, and the pair of flywheels 27 are always rotated in the direction of arrows O and P, respectively. The belt 25 is turned around. The flywheel 27 has large and small gear parts 27a and 27b on its outer circumference and inner circumference.The flywheel 2
Of the two large and small gear parts formed in the reel unit 5, the smaller gear part 27b is configured to mesh with the large diameter: 1!7 part of the double gear 5r of the reel unit 5 via a pair of front and rear idler gears 28. There is. As is clear from FIGS. 2, 3, and 9, the idler gear 28 is connected to the chassis 3.
The support lever 30 is rotatably attached to one end of a swinging support lever 30 via a shaft portion 4430a. By swinging the support lever, the reel units 1 to 5 are attached to and detached from the double gears 5f. Further, the support lever 30 is connected to the idler gear 28 by the coil spring 301), and the double gear 5 [
is biased in a direction that approaches . As shown in FIGS. 2, 7, 9, and 18, gears 16 to 19 are provided on the rear surface of the leaf chassis A11.
A first gear 33 and a second gear 34 can be freely moved in one rotation at the upper part. The first gear 33 meshes with gear 16 of a gear transmission 120 (see, for example, FIG. 7), and the second gear 34 meshes with gear 18 of the gear transmission mechanism. Here, the first gear 3 is connected to the gear transmission mechanism 20, the worm 22, the pulley 23, the belt 25, etc.
3 and the second gear 34I, the motor 2 as an il-drive source
A rotational force applying mechanism is configured to receive the rotational force from 4. Further, the rotational force applying mechanism and the motor 24 constitute a rotational force applying means that rotationally drives the first gear 33 and the second gear 34. The first gear 33 is for reciprocating a head stand, which will be described later. First, a structure for connecting the first gear and the head stand will be described. For example, as shown in FIGS. 7 and 18, a pin 33a is protruded from the rear surface of the first gear 33, and the pin 33a urges the first gear 33 clockwise in FIG. One end of a coil spring 35 is hung. The other end of the coil spring 35 is hung on a plate 36 fixed to the tip of the rotation support shaft (not shown) of the gears 16 and 18. As shown in FIGS. 2, 3, 9, and 11, a bent portion 3a extends upward parallel to the sub-chassis A11 at the rear end of the chassis 3, that is, at the rear of the sub-chassis A11.
is formed. As shown in FIG. 4, a control plate 39 made of a lead plate is mounted on the front surface of this bent portion 3a (A and H) so as to be movable in the right direction. A movement limit of 1 step to the left of the control board 39 is called the 11th maximum movement position of the control board, whereas a movement limit of 1 step to the right is called the maximum return position. What do you mean? A coil spring 40 is connected to the right end of the control plate 39 to urge the control plate to the right, that is, in the backward motion direction. A protrusion 39a that can be engaged with the pin 33a of the first gear 33 is formed at the upper end of the control plate 39, which is approximately in the center thereof. The protrusion 39a is located at the right edge of the hole a5 and engages with the pin 33a.
Therefore, the control plate 39 is moved forward by the rotation of the first gear 339. As shown in FIGS. 2, 4, and 10, the lower part of the control plate 39 is connected to the control plate via a coil spring 11, and as the control plate moves forward, it moves to the left. A moving lever B42 is arranged. A protrusion 42a is formed at the right end of the lever [342] to engage with the right edge of a protrusion 39b formed at the lower end of the control plate 39. With the return movement of 39, lever B42
It also returns to the right side. As is clear from FIGS. 2, 8, and 10, the left end of the lever B42 is provided on the lower surface of the chassis 3 so as to extend back and forth, and rotates at its center via a pin 44a. Chassis 3 freely
It is pivotally attached to the rear end of the lever C4=1, which is attached to the lever C4=1. The front end of this lever C44 is connected to a head stand 47 provided on the sillage 3 so as to be able to reciprocate in the left and right direction.
It is centered on Note that the driving direction of the magnetic tape is l.
y+backward direction, and therefore, the moving direction of the head stand 47 is approximately perpendicular to the tape transport direction. The first gear 33, the control plate 39, the coil springs 40, 41, the lever B42, and the lever C44,
The head stand 47 and the peripheral small members related to these
A head stand drive mechanism is configured to drive the head stand. Next, the second gear 34 and its related parts will be explained. The second gear 34 is for rotating the magnetic head 49 installed on the head stand 47-L, and is for rotating the magnetic head 49 installed on the head stand 47-L.
It is arranged at a position farther from the head stand 47 than the gear 33. In addition, the first gear 33 and the 21st gear 34
The rotation ratio is 1:1. As is clear from FIGS. 7 and 18, the second gear 34
Two stop pins 34a and 34b are provided protruding from the rear surface with a pitch of 180°, one of the stop pins 34. A extends through the second gear so as to protrude from the front surface of the second gear. In addition, both stop pins 34
a and 34b engage with the right edge of a protrusion 39c protruding from the upper end of the rear end of the control plate 39. ] That is, the control board 39
can also be moved forward by both stop pins. Also, the second gear 31! A pawl member 51a and a spring portion U51b are provided near I, and the second gear 34 is rotated by the pawl member and spring member when π1 as shown in FIG.
7-i1~ has been defeated by A-1. As shown in FIG. 18, a movable plate 52 made of a rope plate is mounted on the rear surface of the subchassis A so as to be able to reciprocate in the left and right direction.
is being pulled. Claws 52a and 52b are formed at the right end of the moving plate 52 and can be engaged with the stop pin 34a protruding from the front surface of the second gear 34. The claw portion 52a engages with the stop pin 34a at its right edge, and the claw portion 52b engages with the stop pin 34a at its left edge. That is, the movable plate 52 reciprocates as the second gear 34 rotates 180° in one direction. As shown in FIG. 2, FIG. 3, and FIG. 9, a lever D53 formed in a substantially dogleg shape is disposed near the left end of the moving plate 52, and the lever D53 has a central bent portion. It is rotatably mounted on the -V surface of the chassis 3. Further, the lever D53 is clicked (=J biased) by a spring 54 (see Fig. 3). The left end of the moving plate 52 is pivotally attached to the rear end of this lever D53. The slide member 5 is provided on the head stand 47 so as to be able to reciprocate in the front-rear direction.
6 (also shown in FIG. 5). As shown in FIGS. 2, 5, and 9, the magnetic head 49 is disposed to the right of the Nislay 6 member 56. As shown in FIGS. The magnetic head 49 is rotated around an axis parallel to the moving direction of the head stand 47, that is, an axis perpendicular to the magnetic tape contact surface of the magnetic head, by a bearing member 57 fixed on the head stand 47. It is rotatably supported at the center. The rotating shaft portion of the magnetic head 49 is made of die main 11st alloy, and a bearing portion 4457 that fits into the rotating shaft portion
The material is PPS resin containing glass fiber. The angular position of the magnetic head 49 shown in FIG. 5 will be referred to as the first angular position of the magnetic head, and the position rotated 180 degrees from the first angular position will be referred to as the second angular position of the magnetic head. to be called. The magnetic head 49 is rotatable between the first angular position and the second angular position. A fan-shaped gear 59 is disposed at a position sandwiching the slide member 56 with the bearing member 57, and is rotatably attached to the front end of the bearing member 57 at the main part of the fan. However, so that the joint between the fan-shaped gear 59 and the bearing member 57 does not hinder the reciprocating movement of the slide member 56,
The slide n++ 4A56 is provided with an elongated hole 56a extending in the front-rear direction into which the coupling portion is loosely fitted. Note that the fan-shaped gear 59 is click-biased by a coil spring 60. A bottle 59a is provided protruding from the right end surface of the fan-shaped gear 59, and the bottle is pivotally attached to the slide member 56. That is, the fan-shaped gear 59 swings as the slide member 56 reciprocates. A gear portion of the fan-shaped gear 59 is meshed with a gear 61 coaxially fixed to the rotating shaft portion of the magnetic head 49. The second gear 34, the moving plate 52, the lever D53, the spring 54, the slide member 56, the bearing member 57, the sector gear 59, and the coil spring 60.
A head rotation mechanism for rotationally driving the magnetic head 49 is constituted by the gear 61 and related small peripheral members. Further, the head rotation mechanism and the above-described head stand drive mechanism are collectively referred to as a control mechanism. The control mechanism causes the head stand 47 to reciprocate and rotates the n magnetic heads 49. As understood from the above explanation, the first gear 33 rotates 360 degrees, causing the head stand 4 to rotate.
7 performs forward and backward movement, and the second gear 34
The magnetic head 49 rotates 180 degrees, causing the magnetic head 49 to rotate 180 degrees.
It is designed to rotate by 0°. Here, the azimuth adjustment means for regulating the angle of the magnetic head 49 will be explained. For example, as shown in FIGS. 5 and 9, the head stand 4
A regulating member 64 extending in the front-rear direction is fixed on the magnetic head 7 so as to surround the magnetic head 49. The regulating member 67'l is made of a steel plate and has flexibility. The regulating member 64 is formed symmetrically in the front-rear direction, and is fixed to the head stand 47 at its central portion.
Further, both front and rear ends extending in directions away from each other centering on the central portion can be engaged with the outer periphery of the magnetic head 49. More specifically, both front and rear ends of the regulating member 64 are positioned so as to sandwich the magnetic head 49 from the front and back, and both ends are bent into a U-shape, with the lower side of the U-shape being magnetically A protrusion 4 protruding from the outer periphery of the head 49
By engaging with 9a, rotation of the magnetic head 49 is restricted. Note that the magnetic head 7 is on the upper surface of the regulating member 64! When I9 rotates, the protrusion 49a of the magnetic head touches the regulating member 6.
The opening 64a is provided so as not to hit the opening 64a. A pair of screws 65 screwed into the head stand 47 are engaged at both front and rear ends of the regulating member 64 at their necks. Further, a pair of springs 66 are interposed between the lower surface of both the front and rear ends of the regulating member 64 and the head stand 47 to apply an upward bias to the front and rear ends. However, only one spring 66 is shown in FIG. These screws 65 and springs 66 constitute positioning means for positioning both the front and rear ends of the regulating member 64. Further, the positioning means and the regulating member 64 constitute an azimuth adjusting means. In other words, by tightening or loosening the pair of screws 65, the angle of the magnetic head 49 at the two angular positions can be adjusted individually. Note that the same effect can be obtained by dividing the regulating member 64 at its center to form two members and fixing each member in a cantilever shape to the head stand 47 directly above the magnetic head 49. is obtained. However, by using the above-mentioned regulating member as a single member with a symmetrical shape from front to back, the number of parts is reduced and the number of assembly points is also reduced, which contributes to low speed. . The story is i)i+ikill-d, but for example, it is not shown in FIG. Part 33C
and 33 (I is provided. When the first tooth medium 33 is in its operating state 1f1, the toothless portion 33G corresponds to the gear 16 (part of the gear transmission mechanism 20), and Partial tooth portion 3 is activated by a start trigger lever, which will be described later.
31) is restricted from biting into the gear 16. On the other hand, the second gear 34 (two toothless parts 34c and 34d are formed with a pitch of 180°, and when the second gear is in a stationary state before operation, the toothless part 34c is the same as the gear 1).
8 (part of the gear transmission mechanism 20), and
As will be described later, the rotation of the second gear is restricted so that the toothed portion does not enter the gear 18. Next, a trigger means for causing the second gear 34 to mesh with the gear 18 after the first gear 33 meshes with the gear 16 when the first gear 33 and the second gear 34 rotate will be explained. . As is clear from FIG. 4, at the rear end of the control plate 39,
A regulating portion 39d is formed that engages with the stop pins 34a and 34b of the second gear 34 to regulate rotation of the second gear when the control plate is not at the most backward movement position (rightward movement limit position @). has been done. As shown in FIGS. 2, 4, and 17, a prohibition lever 69 is disposed on the left side of the control plate 39, and its lower end is pivoted to the rear end bent portion 3a of the chassis 3. It is attached so that it can move freely. The prohibition lever 69 is formed with an engaging recess 69a that can be engaged with a pin 39e protruding from the +iI'r surface of the central portion of the control plate 39. Further, the prohibition lever 69 is biased clockwise by a coil spring 70 as indicated by I'J in FIG. These prohibition levers 69 and coil springs 70 prevent the control plate 39 from moving back (movement to the right) when the control plate 39 is moved forward and reaches its maximum forward movement position (leftward movement limit position). Prohibited means are configured. On the other hand, as is particularly clear from FIG.
A protrusion 334 that can be engaged with b is formed. That is, when the first gear 33 initially moves, the protrusion 33f of the first gear engages with the engagement protrusion 69b, and the prohibition lever 69 swings counterclockwise in FIG. 17, and is in the forward movement position. control board 39
This means that the state in which the return movement is prohibited is canceled. The above-described inhibiting means (consisting of the inhibiting lever 69, etc.), the control plate 39, the coil spring 40 as a biasing means for biasing the control plate in the backward movement direction (rightward), and the first gear 3
A coil spring 35 serves as a biasing means for biasing the first gear in a direction in which the partial toothed portion 33b of No. 3 meshes with the gear 16 (a part of the gear transmission mechanism 20), and the toothed portion of the second gear 34 A claw member 51a as a biasing means for biasing the second gear in the direction of meshing with the gear 18 (part of the gear transmission mechanism 20)
By means of the spring member 51a and related small peripheral members, when the first gear 33 and the second gear 34 start rotating, the first gear 33 meshes with the gear 16, and then the second gear 34 is connected to the gear 18. Trigger means is configured to engage with the trigger. As shown in FIGS. 2, 7, 9, and 18, a trident-shaped start trigger lever 73 is rotatable at the center of the front surface of the sub-chassis A11. is attached to. As is clear from FIGS. 7 and 18, one end 73a of the start trigger lever 73 is bent rearward at a right angle, and the bent portion can be engaged with the first gear 33. . More specifically, the pin 33a protruding from the rear surface of the first gear 33 passes through the first gear and protrudes from the front surface of the first gear by a predetermined amount -b (). One end portion 73a is adapted to engage with this portion protruding from the front surface.
The rotation of one wheel 33 is regulated. Star 1~1~
A second end portion 73 formed on the lever 73 and extending to the right.
b engages with the left end of the lever AI2 from the lower surface of the left end. However, the second start trigger lever 73
The end portion 73b is connected to the end detection lever 1 via the lever AI2.
0, and when the end detection lever 10 moves upward, the start trigger 1 collar 73
rotates clockwise as shown in Fig. 18, and the first gear 3
The rotation restriction state No. 3 is released. The start trigger lever 73 has a third end 73G extending downward, and the third end engages with the left end of the magnetic head switching command rod 75 shown in FIG. The magnetic head switching command rod 75 is attached to the lower surface of the chassis 3 so as to be able to reciprocate in the left-right direction, and is made of a steel plate and is formed in an L-shape as a whole. That is, by moving the magnetic head switching command rod 75 to the left, the start trigger lever 7
3 is configured to rotate clockwise in FIG. 18. Also, as shown in FIG. 10, a coil spring 6 is disposed near the head switching command rod 75 to apply a rightward bias to the third pant portion 73c of the start trigger lever 73. . As shown in FIGS. 2, 3, and 17, an electromagnetic solenoid 77 is arranged in the vicinity of the motor 24 so as to extend from side to side, and is fixed on the chassis 3. There is. A movable rod 77a of the electromagnetic solenoid 77 protrudes to the right with respect to the solenoid body, and a pin 7711 extending in the vertical direction is fitted at the tip of the movable rod. The lower end of the bin 77b is loosely fitted into a long hole 3C formed on the main surface of the chassis 3 so as to extend in the left-right direction, and
It engages with the right end of the magnetic head switching command rod 75. That is, by pulling the movable rod 77a of the electromagnetic solenoid 77, the magnetic head switching command rod 75 moves to the left (therefore, the start trigger lever 73 rotates clockwise in FIG. 18). It is being done. Further, as shown in FIG. 1, an operation switch group 79 is arranged on the front surface of the housing 2 and to the right of the opening 2a, and one switch of the operation switch group is connected to the electromagnetic solenoid. This is a command switch for operating 77. Figure 2, Figure 4, Figure 1
As shown in FIG. 0 and FIG. 17, on the front surface of the rear bent portion 3a of the seat 3, from which the control plate 39 has been removed, there is a control plate that is movable in the same direction, that is, in the left and right directions. A member 81 is attached and screwed on. This moving member 81 is sandwiched between the bending portion 3a and the control plate 39 and is placed at the φ position. A projection 81a is provided at the upper end of the left end of the moving member 81, and the pin 33a of the first gear 33 can engage with the right edge of the projection. In other words, the moving member 81 moves to the left together with the control plate 39 as the first gear 33 rotates. Moving member 81
A coil spring 82 is connected to the right end of the movable member for imparting a rightward bias to the movable member. As is particularly clear from FIG. 3, a T-shaped lever E83 is disposed on the right side of the moving member 81.
Further, it is rotatably attached to the rear end bent portion 3a of the chassis 3 at approximately the center thereof. A first end 83a formed on the lever E83 and extending downward is connected to the rear end of the moving member 81 via a coil spring 84. That is, by moving the moving member 81 to the left, the lever E83 is rotated in the direction shown in FIG. 17. A bottle 83c extending forward is protruded from the tip of a second end 83b formed on the lever E83 and extending leftward, and the bottle is connected to a convex portion 39Q formed at the rear end of the control plate 39. and the recessed portion 39h, respectively. When the bin 83c is engaged with the concave portion 39h, the control plate 39 can move to its most backward movement position (rightward movement limit position), and when the bin 83C is engaged with the convex portion 39() When the a1 control plate 39
is not in the R return position, the regulating portion 39d formed on the control plate closes the stop pin 3/(a, 3) of the second gear 34.
4b, the rotation of the second gear is restricted. As shown in FIGS. 2, 3, 9, and 17, other electromagnetic solenoids 86 are arranged in parallel with the electromagnetic solenoid 77, and n,
It is fixed on the chassis 3. This electromagnetic solenoid 8
The movable rod 86a of No. 6 protrudes leftward with respect to the solenoid main body, and a pin 86b extending in the front-rear direction is fitted to the tip of the movable rod. This pin 86b is
A third end portion 8 formed on the lever [83 and extending upwardly to cover the lever [83]
It is pivotally attached to the 3d end. Mako, movable rod 8
6a is in its protruding position (as shown in FIG. 17), the pin 830 of the lever E83 engages with the rear end protrusion 39 (+) of the control plate 39.The electromagnetic solenoid 861e1 The cassette deck is activated by turning the key of the automobile in which it is mounted, and when the key is in the on state, the movable rod 86a of the electromagnetic solenoid 86 moves the moving member 81 to the left and pulls it into the direction ξ. Therefore, the pin 83C of the lever E83 engages with the rear end recess 39h of the control plate 39. Also, the above: 1 knee is A)
When the state is reached, the movable rod 8 is moved by the force of the coil spring 820, which forces the movable member 81 to the right.
6a is pulled out, and therefore, the pin 83c of the lever E83 engages with the rear end protrusion 39 (+) of the control plate 39. , the electromagnetic solenoid 86 and surrounding small members related to these prevent the control board 39 from returning to the maximum return position (rightward automatic movement limit position) when the power is turned off, and when the power is turned on. A release means is configured to cancel the prohibition when the prohibition is performed.Next, the tape transport direction switching means for switching the transport direction of the magnetic tape will be explained. 3 and 9, the shaft portion +A30a of the support lever 30 that rotatably holds the idler gear 28 is connected to the capstan. Note that as shown in FIG. , this shaft member 30a is also connected to the rotational support shaft of the flywheel 27.On the other hand, the third
As is particularly clear from the figures and FIG. 5, eight support shafts extending upward are protruded on the chassis 3 near the capstan 30a, and the support shafts have free movement. edge . A pinch roller 90 is rotatably attached to the arm member 91. The pair of pinch rollers 90 are each detachable from the capstan 30a. A pin 91a that passes through the arm member in the vertical direction is fixed to the free end of the arm opening 91, and a spring for adjusting the azimuth of the magnetic head 49 is attached to the lower end of the left edge of the pin. 66 (see, for example, FIG. 5) is engaged at one end. Arm member 9
1 is biased by this spring 66 in a direction in which the pinch roller 90 approaches the capstan 30a. The capstan 30a, the pinch roller 90, the reel unit 5, the idler gear 28, and the peripheral small members related to these components form a tape drive system that corresponds to the two rotational angular positions of the magnetic head 49. A tape transport direction switching means is configured to determine the transport direction. Each pin 91a provided at the tip of the arm member 91
The upper ends of the slide member 56 can be engaged with the front and rear ends of the slide member 56, respectively. More precisely (1) The front end and the rear Mj of the slide member 56 have two notches 56C each extending in the front-rear direction and having open ends facing each other. The pins 91a of the arm member 91 can be selectively engaged with each other in the notch 56C as the slide member 56 reciprocates. A tapered portion 56d is formed at the front edge of the Ul distal end portion, and the pin 91a is smoothly guided into the notch portion 56C by this tapered portion 56d.The pin 91a engages with the notch portion 56C. By doing so, the arm member 91 is rotated to the left by a predetermined amount, and the pinch lever 90 is turned so that it can be removed from the capstan 30a. The pair of pinch rollers 90 are selectively removed from the capstan 30a by the reciprocating motion of the slide member 56, which is a component of the head rotation mechanism described above.As is particularly clear from FIG. , a III-shaped protrusion 47a is formed at both left and right ends of the head stand 47 that supports the slide member 56, with pointed heads facing each other. concave part 4
7b is formed. These protrusions 47a and recesses 17b are adapted to engage with a pin 30d protruding from one swinging end of the support lever 30 shown in FIG. 3, for example, when the head stand/I7 moves to the right. ing. Protrusion formed in 111 shape/17
When a is engaged with the pin 30 (1), the support lever 30 is attached to the idler gear 28
The reel swings in the direction in which the reels 1 to 5 are separated from the double gear 5r, and the fourth part 471 follows the protrusion 47a.
'' is engaged with the pin 30d, the support lever 30 returns to the position where the idler gear 28 meshes with the five double gears. On the other hand, a pair of front and rear support levers 3 are also provided at both front and rear ends of the slide member 56 when the head stand 47 moves to the right.
A protrusion 56e is formed that engages with one of the pins 3C) and d to prevent the pin from entering the four portions 47b of the head stand 47. However, each protrusion 56e is adapted to engage only one of the rear sides of the pair of pins 30d as the slide member 56 moves forward and backward. That is, the pair of idler gears 28 are configured to be alternatively moved 1fllR from the reel unit by the reciprocating movement of the slide member 56, which is a part of the head rotation mechanism. Next, a mechanism for loading cassette halves will be explained. As shown in FIGS. 2, 6, and 12 to 14, the upper surface of the right end of the chassis 3 has a subshield
is permanently installed. On the chassis 3 there is a J that extends in the left and right direction.
A swinging member A96 is disposed, and one swinging member A96 is provided at the rear end of the support protrusion 3d provided at the rear left end of the pusher 895 and the pusher 3. It is attached so that it can move freely. A cassette holder 98 for holding the cabinet holder 7 is swingably attached to the self-mounted end of the swinging unit A960, that is, the front end thereof, at a central portion extending 4J in the front-rear direction. Note that, for example, the position of the cassette holder 98 shown in FIG. 5 will be referred to as the ``2-up position'' of the cullet holder. The cullet half is inserted into the cassette holder 98 in the first row from the direction of arrow S and held in the cassette holder. Also,
From this state, the swinging member 96 swings downward by a predetermined angle, and the cassette half held in the cassette holder 98 is positioned at the playing position.
The position is called the lowered position of the cassette holder. The cullet holder 98 is movable between this lowered position and the above-mentioned position. On the lower surface of the cassette holder 98, there is a movable member 101 which is made up of two members, an upper surface member 99 and a right surface member 100, and which can engage with the force-loading half. I'm being kicked. A pin 1ooa is provided protruding from the right side of the right side member 100, and the pin is slidably fitted into an elongated hole 95a formed in the sub-sillage B95 so as to extend in the front-rear direction. On the other hand, a lever F10 is located at the center lower end of the Zabu chassis 95.
2 is swingably mounted at its lower end, and the upper end of the lever F is pivotally attached to a pin 100a. A coil spring 103 is connected that biases the moving part vU101 in the secondary direction and therefore gives the moving unit vU101 a bias force in the cassette half ejection direction, that is, forward.
b is formed, and when the right side member 100 moves rearward when the cassette half is inserted, the swing support shaft 98a of the cassette holder 98 falls into this recess 100b, and the cassette holder moves to the lowered position. do. Note that the swinging part opening is located at the right end of the swinging member A96 as shown in FIG. A coil spring 104 for biasing in the Ill direction is connected. <j Oh, moving member 1
C) When 1 moves in the cullet half insertion direction (backward), a force [J:] is applied to the cullet half insertion direction (rearward). ;L] Coil spring 03 is given f4 force by j, =) C, l-Kimon lower U (this direction C). As is clear from FIGS. 12 and 14, the moving member 10
The upper surface member 99 of 1 has a protrusion 99G facing the reel hole 106 of the curry 1 to half to be inserted, and this protrusion 99c.
Apply force so that it protrudes into the reel hole 106. A spring portion +A99d that biases the half is provided. Note that the protrusion 990 is formed integrally with the upper surface member 99 by stamping or the like. This J, sea urchin, protrusion 9
90 is formed in seven parts on the upper surface member 99.
There is no need to attach special parts to the upper surface member 99 in order to install the protrusion, and the number of parts and the number of man-hours for mounting are reduced, leading to cost reduction. The upper surface member 99 is also formed with another protrusion 99B that engages with the cassette half in the vicinity of the reel hole 106. Like the above-mentioned projection 99c, this projection 99e is also integrally formed on the upper surface member 99 by stamping or the like.Thereby, cost reduction is achieved for the same reason as above. A recess 10 called a label area formed in a half
7 is engaged. In this manner, by engaging the protrusion 99e with the recess provided in the cassette half, the engagement state of the protrusion 99e with the cassette half becomes firm. In the case 1 to deck, the cassette holders 98 are inserted into the cassette holder 98 along its longitudinal direction. Further, the aforementioned control mechanism, that is, the control mechanism for reciprocating the head stand 47 and rotating the magnetic head 49 is arranged near the deepest part of the power station 1 to the holder 98. has been done. Next, "F operation (tape fast forward operation) and REW operation (
The mechanism for performing the tape rewinding operation will be explained. As shown in FIGS. 2, 3, 9, and 16, the left end of the chassis 3 is bent to extend upward, and the bent portion 3f is A subchassis C111 also shown in FIG. 15 is fixed. A pair of longitudinal operating levers 113 and 114, which extend in the front-rear direction and are vertically stacked, are attached to the sub-chassis C111 so as to be able to reciprocate in the front-rear direction. The front ends, that is, the operating ends of the eight longitudinal operating levers are spaced apart by a predetermined distance to the right of the screen, and each operating end has an operating button 115, 116 provided on the front surface of the housing 2.
(shown in the first figure) is attached. The longitudinal operating lever 113 disposed at the bottom is for forward movement, that is, backward movement, to perform the FF operation, and the longitudinal operating lever 114 disposed above is for forward movement, i.e., for performing the FF operation. Perform REW operation at <'C'! This is another one. Each of these longitudinal operation levers 113 and 114 is arranged above the magnetic head 49. In addition, the cylinder longitudinal operation lever 113.117I
are each given a forward bias by coil springs 118 and 119. Figures 7 and 15
As is particularly clear from the figure, the longitudinal operating levers 113 and 1
Tapered portions 113a and 11 are provided on the left side of the rear end of the head stand 47 so as to be able to engage with the upper end of the longitudinal bin 121 which is protruded from the left end of the upper surface of the head stand 47 when the head stand is moving to the right.
4a is formed. That is, when the head stand 47 is moving to the right, these longitudinal operation levers 113°1
14, the head stand 47 is moved to the left by a predetermined amount, thereby separating the magnetic head 49 from the magnetic tape. In addition, when the head stand 47 is moved to the left by a predetermined amount by operating this J: sea urchin longitudinal operation lever, the head stand 47
The protrusion 4.78 formed at 7 engages with the pin 30d of the support lever 30 holding the idler gear 28, thereby causing the idler gear 28 to move from the double gear 5r to the reel unit 1 from the double gear 5r to l! It is designed to unmask llI. The story goes back and forth, but for example, as shown in FIGS. 123 is set up. When the head stand 47 moves, the head stand 47
The right end portion of the reel unit 5 engages with and presses the claw member 123, and the state in which the reel unit 5 is prevented from rotating in reverse by the claw member is released. Returning to the original topic, as shown in FIG. 12, FIG. 3, and FIG.
A plate 724 is attached to the right side of the rear end so as to be movable in the front-rear direction. plate 12
A coil spring 125 is connected to the upper end protrusion 124a of the play 1 to give a forward bias to the play. Lever 1-1126' is rotatably mounted at its central portion. As can be seen particularly in FIG. is a protrusion 11 extending downward and projecting from the longitudinal operation lever 113 described above.
The trailing edge of 3C is abutted. In addition, the lever 81
The rear edge of a protrusion 114c extending substantially leftward and protruding from the other longitudinal operation lever 114 is brought into contact with the front edge of the second end 126b formed at 26 and extending upward. There is. That is, by pressing the longitudinal operating levers 113 and 114, respectively, the lever 1-1126 is rotated counterclockwise and clockwise in FIG. 16. A lever 1129 formed in a substantially dogleg shape is arranged in front of the plate 124, and its central bent portion is rotatably attached to the left bent portion 3f of the chassis 3. A bottle 129b is protruded from the tip of a first end 129a formed on the lever 1129 and extending rearward, and this bottle 129b is connected to a third end 126c formed on the lever 1-1126 and extending forward. It is slidably fitted into a long hole 126d formed in the hole 126d. Further, the second end 129c of the lever 1129 extends downward. As shown in FIG. 2, FIG. 3, FIG. 10, and FIG. 16, each pair of reel units 5 and flywheels 2
A swing lever 130 is disposed extending in the [i-right direction] at a position where it is held between the bins 130 and 7.
Take the swinging motor 11 to the chassis 3 via a.fil tJ
It is being The left end of the swinging lever 130 is the lever 112
A pivot U is attached to the distal end of the second end 129G of 9. Further, on the lower surface of the right end of the swing lever 130, three gears 132, 13. A one-way transmission mechanism 135 consisting of: 3 and 134 is provided. The gear 132 which is the first stage gear of the gear transmission (14) can mesh with each gear part 27a of the pair of flywheels 27, and the gear 134 which is the final stage gear is a small diameter gear formed in the double gear 5r of the reel 1-5. The lever t-112 is engaged with the gear portion 4q.That is, when the longitudinal operation levers 113 and 114 are pushed, respectively, the lever t-112
The swing lever 130 swings backward and forward via 6,
As a result, the reel units 5 arranged at the rear and front
are selectively rotated at high speed. As shown in FIG. 2, FIG. 7, FIG. 15, and FIG. An intermediate lever 138 is provided that can reciprocate in the direction of movement (back and forth direction) of both armature operating levers. A coil spring 139 is connected to the intermediate lever 138 to provide a forward thrust to the intermediate lever. As is particularly clear from FIG. 15, a bin 138a is protruded from the lower surface of the rear end of the intermediate lever 138, and the bin 138a corresponds to the longitudinal operating lever 1.
13. A long hole 14 formed to extend in the front and back at 114
0 in a slidable manner. A four part 140a into which a bottle 138a can be inserted is formed on the right end side of the central part of the elongated hole 140. Here, the intermediate lever 138 can swing through a predetermined angle about a support shaft 138b on its front end side. In addition, a coil spring 139 that biases the intermediate lever 138 forward is stretched so as to be inclined to the right from the rear to the front, so that the intermediate lever 138 is attached to the support shaft -46=138b. There is also an A-1 force in the anti-chronological direction, as shown in Figure 15, centered on . Lee straw, tube longitudinal operation lever 1
13, 11711 are simultaneously moved forward (backward movement) u, the bin 138a of the intermediate lever 138 moves into the elongated hole 1.
40, so that the intermediate lever 138 is moved rearward. However, only one of the pair of longitudinal operating levers 113 and 114 was moved forward (in J, the rear right edge 14 of the elongated hole 140 formed in the other longitudinal operating lever
0b is still in contact with the bottle 138a, so 11. of the intermediate lever 138 is moved. No movement (movement backwards) is made. Although not described in detail, "Longitudinal operation lever 1 for F operation"
13. RFW operation When one of the longitudinal operating levers 114 is closed in the forward movement position, a mechanism is provided that locks the lever in the forward movement position. When the longitudinal operating lever of Puno is moved forward, lock the longitudinal operating lever in the forward moving position, and release the one longitudinal operating lever.
. 3LI, when either of the longitudinal operation levers 113 and 114 is pressed, the lever J142 provided at the rear of the cylinder longitudinal operation lever is swung in the closing direction in FIG. 15, and the mute switch 143 is turned on. It is made to work. For example, as is clear from FIGS. 2 and 7, a bottle 138d is protruded from the upper surface of the rear end of the intermediate lever 138, and the bottle 138d is attached to the left end of the swinging member 96 (for example, shown in FIG. 6). 96a. The intermediate lever 138 pushes the swinging portion 96 rearward by moving forward, and moves the cassette holder 98 from the lowered position described above to the raised position. Next, various switches provided in addition to the mute switch 1713 and their arrangement will be explained. As is clear from FIGS. 2 and 6, the subchassis B
A bracket 146 is installed on the right end surface of the 95 (4t-J and J3), and two switches 147,
148 has been removed. The switch 147 is used to switch the power to the J set deck and a tuner disposed near the cassette deck. Further, the switch 148 is for operating the motor 24. Both switches 147 and 148 are mechanically actuated upon insertion of the cassette half into the cassette holder 98. As shown in FIGS. 2, 7, and 18, a switch 149 for switching between [[ and REW] is fixed on the front surface of the left end of the subchassis A11. This switch 149 is operated by engagement of the moving plate 52 attached to the subchassis A. Also, as shown in FIG. 15, the subchassis 111
A switch 150 for cutting off the power supply to the cassette deck is fixed on the top, and the switch 150 is activated when the intermediate lever 138 moves forward (moves backward) t! Operates when closed. The operation of the cassette deck configured as described above will be briefly explained along the operating procedure with reference to FIGS. 19 to 26. First, insert the cassette half 155 (shown in FIG. 19) through the opening 2a of the housing 2 shown in FIG.
j: Hold the cassette half in the cassette holder 98 as shown in FIGS. As shown in FIG. 20, the cassette half 155 is attached to the cassette holder 9.
8, the right side member 100 moves rearward, thereby supporting the swing of the cassette holder 98!
Iil+ 98a falls into the recess 100b of the right side member 100, and the cassette holder is moved to the lowered position. Therefore, the cassette half is set at the playing position. Along with this cassette half insertion operation, the switches 147 and 148 shown in FIG.
starts rotating. When the motor 24 rotates, as shown in FIG. 10, the small pulley 24a is rotated in the direction of arrow Mh, the pulley 23 is rotated in the direction of arrow N, and the pair of front and rear flywheels are rotated in the directions of arrows O and P, respectively. . Follow C
The pair of reel units 5 begin to rotate in the directions of arrows Q and R (as shown in the 10th figure) through one pair of idler gears 28, respectively. This J, sea urchin, a pair of reels - 1 piece 1 to 5
Since the magnetic tapes rotate in opposite directions, the slack in the magnetic tape in the tapes 1 to 155 is taken up. When the slack in the magnetic tape is taken up and a predetermined tension is applied to the magnetic tape, all of the constituent members of the reel unit 5 shown in FIG. 11 except for the double gear 5f are The double gear 5f is fixed by the reaction force of the tension, and only the double gear 5f continues to idle with respect to the group of fixed members via the bolt plate 5t+. Therefore, the magnetic tape is not transported with the above tension applied to it. On the other hand, the end detection gear 14 shown in FIGS. 7 and 18, for example, is rotated in the opposite direction h1 in FIG. 18 via the gear transmission mechanism 20 by the rotation of the motor 2/l. Therefore, as the end detection gear 14 rotates, the bin 10b protruding from the end detection lever 10 moves to the mountain-like protrusion 14 of the end detection gear. is moved to the top of b. Here, as is clear from the above, the arm 51 of each reel unit 5 is stopped. Therefore, the intermediate lever 7 is not activated, and the bin 10b of the end detection lever 10 does not continue to move along the mountain-shaped protrusion 14b. Therefore, the pin 10b of the end detection lever 10 comes to rest at the top position of the mountain-like protrusion 14b, whereby the protrusion 14C of the end detection gear 14 engages with the pin 10b. Therefore, the end detection lever 10 moves upward, and the star 1 trigger lever 73 rotates in the direction 81 in FIG. 18 via the lever Δ12. Thus, star 1~
Since the pin 33a was engaged with one end of the trigger lever 73, the first gear 33, whose rotation was restricted, becomes rotatable, and the biasing force of the coil spring 35 causes the first gear 33 to rotate as shown in FIG. It can be rotated clockwise. Therefore, the partial tooth portion 33b of the first gear 33 meshes with the gear 16, and the first gear begins to rotate. As the first gear 33 rotates, the control plate 39 shown in FIG. 17 is moved to the left, and therefore the head stand 47 is moved to the right as shown in FIG. comes into contact with. When the control plate 39 reaches the forward movement position (leftward self-movement limit position), the engagement recess 6.9a of the prohibition lever 69 engages with the pin 39e protruding from the control plate. The return movement (movement to the right) is prohibited. As the first gear 33 rotates, the moving member 81 shown in FIG. 17 is also moved to the left as shown in FIG. 23. Therefore, the lever E83 moves clockwise as shown in FIG. 23, and the movable rod 86a of the electromagnetic solenoid 86, which is already in the on state, is pushed in. By this operation, the pin 830 of the lever E83 engages with the recess 39h formed at the right end of the control plate 39, and therefore the control plate 39 reaches its maximum return position (six-direction movement limit position). movement becomes possible. Further, by the pin 39e of the control plate 39 entering the engagement recess 69a of the prohibition lever 69 described in -1-, the prohibition lever 69 rotates a predetermined amount clockwise as shown in FIG. 23, and the upper end of the prohibition lever The Micoat switch 143, which had been turned on via the lever J142 (for example, see FIG. 7), is turned off. On the other hand, as shown in FIG. 22, by moving the head stand 47 to the right, the front idler gear is separated from the double gear 5f of the front reel unit 1-5, and only the rear reel unit 5 is rotated. That will happen. Note that this operation is performed by the protrusion 47a and recess 47b formed on the head stand 47, and the protrusion 5 provided on the slide member 56.
This depends on the interaction with 6e, but since it was explained in detail in the previous explanation of the configuration, it will not be explained in detail here. Further, as shown in FIG. 22, as the head stand 47 moves to the right, the rear pinch roller 90 comes into contact with the capstan 30a, and the other, that is, the front pinch roller 90, contacts the capstan 30a. It is held at 111112 from the stun. This is the arm member 9 that supports the front pinch roller 90.
This is because the bottle 91a protruding from 1 is fitted into the notch 56c of the slide member 56. Similarly, as shown in FIG. 22, due to the rightward movement of the head stand 47, the pair of claw members 123 that had been engaged with the reel unit 5 are moved away from the reel unit. L is praised. In this way, tape transport to the FWD side is started, and reproduction on the FWD side is performed. Next, the operation of switching from FWD-side playback to REV-side playback will be described. When the switch for changing the tape transport direction is pressed, the electromagnetic solenoid 77 is turned off, and the movable rods 7, 7a of the electromagnetic solenoid are pulled. Therefore, the star 1 to the trigger lever 73 are rotated in the upward direction in FIG. 18 via the magnetic head switching command rod 75. As a result, the first fiI wheel 33, whose rotation was restricted by the start trigger lever, is now able to rotate once, and is rotated clockwise as shown in FIG. 18 by the biasing force of the coil spring 35. Therefore, the partial tooth portion 33b of the first gear 33 meshes with the gear 16, and the first gear begins to rotate. When the first gear 33 starts rotating, the first gear 33 starts rotating.
The protrusion 33 [protruding from the gear] is the prohibition lever 69 (17th
17) and rotates the prohibition lever counterclockwise as shown in FIG. 17 (see figure).
The engagement recess 69a of the prohibition lever and the pin 39 of the control plate 39
When the engaged state of e is released, the control plate 39 is instantly returned to the most backward movement position (rightward movement limit position) by the biasing force of the coil spring 40. When the control plate 39 returns to the most backward movement position, the head stand 47 moves to the left, and the magnetic head 49 is moved from the magnetic tape to HlIIR. When the control plate 39 is at the maximum forward movement position @ (leftward movement limit position), the stop pin 34a is engaged with a regulating portion 39d (for example, shown in the fourth figure) formed on the control plate.
Rotation of the second gear 3/l is restricted. This restriction is released by returning the control plate 39 to the above-mentioned most backward movement position, and the second gear 34 is moved as shown in FIG.
It can be rotated clockwise. Therefore, the second gear 3
The toothed portion of No. 4 meshes with the gear 18, and the second gear begins to rotate. As the second gear 34 rotates, the stop pin 34a protruding from the second float engages with the claw portion 52a of the movable plate 52, and the movable plate is moved to the left.
The magnetic heads 49 connected to the moving plays 1~
Rotated 180° to the side. Also, by moving the moving plate 52 leftward, the switch 149 is moved from the FWD side to the REV side.
can be switched to the side. Due to the above rotation of the second gear 34, the stop pin 34a of the second gear engages with a protrusion 39C (see FIG. 17, etc.) formed on the control plate 39, and the control plate is moved a predetermined distance by the stop pin. lF is moved to the left. When the second gear 34 completes 180° rotation, the stop pin 34
a is detached from the protrusion 39c of the control plate 39, and then the pin 33a of the first gear 33 is removed from the control plate 39.
The control plate 39 is moved to the forwardmost position (leftward movement limit position) and locked by the six prohibition levers as described above. As the control plate 39 moves forward, the head stand 47 moves to the right h again, and the magnetic head 49 comes into contact with the magnetic tape. Also,
The mute switch 143 is also turned off in the same manner as described above. Further, the slide member 56 is moved forward by the leftward movement of the moving plate 52, and as a result, the head stand 47 is moved rightward and the rear idler gear 28 is separated from the reel unit 5. 28 is attached to the reel unit 5, and the front reel -
Only one unit 5 starts rotating. Also, the front pinch 1]-ra 90 is brought into contact with the capstan 30a,
D rear pinch rollers 90 are held separated from the capstan 30a. In this way, the tape transport direction is switched from the FWD side to the REV side. Note that for the operation of switching the tape transport direction from the REV side to the [Wl] side, the stop pin 34 of the second gear 34
This operation is substantially the same as the tape transport direction switching operation from the FWD side to the RFV side, except that b engages with the claw portion 52b (shown in Figure 18) of the moving plate 52 to move the moving plate to the right. Yes, revised) No. 11. Next, the operation of the J mechanism that automatically switches the tape transport direction will be described. For example, when tape transport to the FWD side is completed, a predetermined tension is applied to the magnetic tape at the end, and the reel shown in FIG.
All parts except J (A) are fixed by the reaction force of the tension. Therefore, only the double-1"-A5 [ is attached to these fixed parts via the felt plate 511. The idling continues (-J). When the tape is being fed to the "WU" side, all parts except the fixed parts (1-1) arm part +45i are rotating. , the arm member 51 receives the urging force caused by the rotational force 1, and the floating lever 8
Push the intermediate lever 7 through the
The FL force is heading towards Ih. With this, the end detection lever 10 to which the rear end of the intermediate lever is pivotally connected is the 18th end detection lever 10.
As shown in the figure, the pin 10b protruding from the end detection lever slides while coming into contact with the convex protrusion 14b of the end detection gear 1/l. , the pin 10b never engages with the protrusion 14C of the end detection gear. However, the double gear 5f of the reel unit 5
When the tape is stopped and the other parts are in a fixed state, the force urging the end detection lever 10 is also exhausted, and the protrusion 14C of the end detection gear 14 engages with the pin 10b of the end detection lever. Therefore, the end detection lever 10 is -
V direction, and the start trigger lever 73 rotates in the h1 direction via the lever AI2 as shown in Fig. 18 (when pulled).
The tape transport direction is switched by exactly the same operation as that for switching the tape transport direction to the REV side. Note that automatic switching of the tape transport direction from the REV side to the FWD side is performed in the same manner as described above, and will not be described in detail. Next, FF operation (tape fast forward operation) and REW operation (
(tape rewinding operation) will be explained. For example, when performing FF operation during tape playback, as shown in FIGS. 24 and 25, the longitudinal operation lever 1 for FF operation is
Press 13 to move backward. Then, the switch 1 to switch 1 is activated via lever J142.
43 is on. Further, the longitudinal pin 121 protruding from the left end of the head stand 47 is suppressed to the left by the tapered portion 113a of the longitudinal operation lever 113, thereby causing the head stand 47 to move to the left by a predetermined amount. magnetic head 49
Then, the contact state of the magnetic tape is loosened. As is clear from FIG. 25, by moving the longitudinal operating lever 113 backward, the lever 1" 126 that engages with the protrusion 113G of the longitudinal operating lever is swung in the opposite direction as shown in FIG. Again, the lever 1129 similarly swings in the direction 81h in FIG.
30a as a center in the counterclockwise direction as shown in FIG. Therefore, the first gear 132 of the gear transmission mechanism 135 provided on the swing lever 10 is connected to the rear flywheel 27.
gear FJI 27 a, and the final stage gear 13
4 meshes with the small diameter gear portion of the double gear 5f of the rear reel unit 5. On the other hand, the pair of idler gears 28 are separated from the reel unit 5 by moving the head stand 47 to the left by pushing the longitudinal operation lever 113. Therefore, the rear reel unit 5 rotates at high speed, and the tape is rapidly forwarded. When performing a REW operation, this is done by pushing the REW operation longitudinal control lever 114. Zunawachi,
The protrusion 114G of the longitudinal operation lever 114 is the lever H126.
is engaged with the second end 126b of the lever 1, and the lever 1 is rotated clockwise in FIG.
and the final stage gear 13/I are the front flywheel 2, respectively.
7 and the round unit. Note that the head stand 47 is moved to the left by the tapered portion 114a of the longitudinal operation lever 114 engaging with the longitudinal bin 121 provided on the head stand 47. To eject the cassette half after tape playback is complete, press the FF operation longitudinal operation lever 113 and the REW operation operation longitudinal operation lever 114 at the same time. By pressing the two longitudinal operation levers at the same time, the intermediate lever 138 (for example, No. 2/I shown) moves in the direction J, and the pin 13 protruding from the upper surface of the OHt section after the face intermediate lever moves.
8 (j'b<Jffi moving part monthly moving part 6 shown in the 6th figure). Therefore, the force is the exact opposite of the action when loading the cassettes 1-half 155, which makes the cassettes 1-half 155 more likely to be retrieved by the listener. For example, the switch 150 shown in FIG. 24 is also operated, so the electromagnetic solenoid 86 (see FIG. 23) is turned off, and the action of the coil spring 82 causes the lever "83" to be turned off.
is returned to the state shown in FIG. Therefore, lever E83
The pin 83c provided on the right end of the control plate 39 can engage with the protrusion 39g formed on the right end of the control plate 39.
The return of the three control plates to the most backward movement position (rightward movement limit position) is prohibited. In other words, the state in which the stop pin 34a of the second gear 34 is engaged with the regulating portion 39d of the control plate 39 is maintained, and when the power is turned on again, the second gear 34 starts rotating.
This prevents the tape transport direction from being switched unnecessarily. As mentioned above, the off operation of the electromagnetic solenoid 86 is also performed when the key of the automobile in which the deck is mounted on the case 1 is turned off. In the cassette deck, the first gear (
a head stand drive mechanism including a head stand drive mechanism (33); and a second gear (34) for rotating a magnetic head (49) rotatably installed around an axis substantially parallel to the moving direction of the head stand.
), and the first gear and the second gear are applied with rotational force by a rotational force applying means including a single drive source (motor 24). There is. Therefore, compared to a cassette deck in which two or more drive sources are used to perform the reciprocating motion to attach and detach the magnetic head to and from the magnetic tape, and the rotational motion of the magnetic head to match the forward and reverse running of the magnetic tape, the force reflex is 1. 1. It is easier to downsize the entire device and reduce space. Further, in the crane 1 to the deck according to the present invention, the rotating gear (1) includes a gear transmission mechanism in which the first gear and the second gear mesh with each other, and after the first gear meshes with the gear transmission mechanism, Trigger means is provided for causing the two gears to mesh with the gear transmission mechanism.Therefore, the head stand moves to completely remove the magnetic head from the magnetic tape.
Since the magnetic head rotates after lit 1112, there is no damage to the magnetic tape or generation of noise. Further, in the cassette deck according to the present invention, the trigger means is provided so as to be able to reciprocate between the most forward position and the most backward position, and is caused to move forward by the rotation of the first gear. and a control portion formed with a regulating portion (39d) that engages with a stop pin (3iJa, 34b) protrudingly provided on the second gear to regulate rotation of the second gear when the second gear is not at the most backward movement position. The control plate includes a plate (39), and the control plate is provided with a protrusion (39c) that engages with the stop pin so that the control plate can also be moved forward by the spring pillow. There is. The control plates (three) perform their functions by reciprocating through a predetermined stroke, but it is also possible to move the control plate by the stroke by using only the first gear. However, if we try to ensure the stroke necessary for the control plate to work only with the first gear, the diameter of the first gear must be made considerably large.
As a result, the size of the cassette deck as a whole was increased. Power heel 1 according to the present invention
- In 4:, the control plate is also moved forward by the second gear, and the stroke is ensured by the interaction of the first and second gears, thereby keeping the diameters of both gears small. Therefore, it is easier to reduce the size of the entire unit. Furthermore, in the cassette deck according to the present invention, the first
Immediately after the initial movement of the first gear, the portion of the gear (33) that should mesh with the gear transmission mechanism is within a predetermined range -66= and has missing teeth (33d). With this configuration, the operation when the tape playback direction is reversed is as follows. Initial movement of the first gear (33) → release of the control board's backward movement lock 11 → control board moves to the most backward movement position (-the magnetic head (19) moves from the magnetic tape to the 1III theory)-) the second gear (3/I) ) rotation restriction released → 2nd tooth medium rotation (-magnetic head rotation) -> 2nd
The rotation of the gear causes the control plate (39) to move forward (- the magnetic head (/19) approaches the magnetic tape). 1i!
! l! The C1 first gear (33) is biased in the direction in which the seventh gear meshes with the gear transmission mechanism A and the first gear means. The tooth part rotates instantaneously, and the second gear (3/I) takes over the forward movement of the control plate that has been moved forward, and moves the control plate to the most forward movement position. In other words, since the first gear instantly catches up with the forward movement of the control board by the second gear and moves the control board forward, wasted time can be saved and the listener may feel frustrated. There is no such thing as

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of the cassette deck according to the present invention, FIG. 2 is an exploded perspective view of the internal structure of the cassette deck, and FIGS. 3 to 8 are partial detailed perspective views of the internal structure.
FIGS. 9 and 10 are plan and rear views of the internal structure, FIGS. 11 to 18 are views showing details of the internal structure, and FIGS. 19 to 26 are views of the operation of the cassette deck. This is a diagram for explaining 1". Explanation of symbols of main parts 1... Power supply 1 Deck 2... Housing 2a... Opening 3...・
...Chassis 3a, 3f...Bending portions 3c, 5m, 56a, 95a, 126d. 140...Elongated hole 3d...Support protrusion 5...Reel units 1-5a...Rotation shaft 5b...
・Reel 5C...Color 5d...
・Bushiko 5e... Expanded diameter part 5f...
・Double gear 50, 5 (1, 30b, 35.40.4
'l. 60, 70. 76, 82.84. 103°10
4, 118. 119. 125. 139...
... Coil spring 5h ...)] Root plate 51 ... Arm 5j, 5k ... Washer 7 ... Intermediate lever 7a, 8a, 8b, 10b' , 30d, 33a. 39e, 44a, 77b, 83c, 86b. 91a, 100a, 129b', 130a. 138a, 138d, ..., Bin 7b, 6/Ia...Opening 7c, 56c...Notch 8...Idle lever 10... Torque detection lever 10a, IIIc, 33f, 39
a, 39 b. 39G, /+2a, 47a, I! 19a, 56e. 81a, 99c, 99e, 113c. 114G...Protrusion 11...Ribshi ν-shi A 12...Lever A 17'I...End detection gears 14a, 39h, 47b, 100b. 140a...Protrusion 14b...Protrusion 16.17, 18, 19.61, 132°133.13
4...Gear 20.135...Gear transmission mechanism 22...
・Tsum 23...Pulley 24...
・Motor 24a...Small pulley 25...
... Belt 27 ... Flywheel 2
7a, 27b...Gear portion 28...Idler gear 30...Support lever 3Qa...Capstan 33...
...First gear 33b... Partial tooth portions 33c, 33d, 34c, 34d --- Missing tooth portion 34
...Second gears 34a, 34b...Stop pin 36.124
...Plate 39...Control board 39d...
Regulation part 390... Convex part 42...
...Reno ζ-B44...Lever C47...
... Spatula 1z stand 49 ... Magnetic head 51a, 123 ... Claw member 51b, 99d ... Spring member 52 ... Moving plate 52a, 52b. ...Claw portion 53...Lever D 54.66...Spring 56...Slide portion l 56d, 1 1 3a, 1 1
4 a ... ... Qi 1< Part 57・
...Bearing part month 59...Fan-shaped -1!
Aro 4...Regulation part month 65...Screw 69...Prohibition lever 69a...
Engagement p-q N+691)...P...Engagement protrusion 73...Star 1~Trigger lever-73a...
...One end portion 73b, 83b, 126b, 129c...
Second end 75...Magnetic head switching command rod 77.86
......Electromagnetic solenoids 77a, 86a...
・Movable Ron door 9... Operation switch group 81.
...Moving part 83...Lever 83a, 126a, 129a...First end 89
．． 138b...Support shaft 90...Pinch roller 91...Ar\part A95...Rib chassis B 96...Swinging part tA' 96 a...
...Left end portion 98...Carre 1 to holder 9
8a... Swing shaft 99... Top member
100...Right side member 101...
Moving part 0 102...Lever F106...
... Reel hole 107 ... Concavity 11
1...Nabushi V-C 113,114...Longitudinal operation lever 115.1
16...Operation button 121...Longitudinal bottle 124a...Top protrusion 126...
...Lever 1-1 129...Lever 113
0... Swinging lever 138... Intermediate lever 1/IOb... Rear right edge 142... Levy J 143... Mute switch 146...Bracket

Claims (1)

[Claims] a head stand that is reciprocally movable in a direction substantially perpendicular to the tape transport direction; and a head stand that is provided on the head stand so as to be rotatable between two angular positions about an axis that is substantially parallel to the moving direction of the head stand. a magnetic head; a tape transport direction switching means for determining a tape transport direction corresponding to the angular position of the magnetic head; a head stand drive mechanism including a first gear that reciprocates the head stand by rotation; A head rotation mechanism including a second gear that rotates the magnetic head, and a gear transmission mechanism that can mesh with the first and second gears to apply rotational force from a single drive source to the first and second gears. a rotational force imparting mechanism that causes the second gear to mesh with the gear transmission mechanism after the first gear meshes with the gear transmission mechanism; The gear is provided so as to be reciprocally movable between the first gear position and the most backward movement position, is caused to move forward by the rotation of the first gear, and is engaged with a stop pin protruding from the second gear when the first gear is not in the most backward movement position. a control plate on which a regulating portion for regulating the rotation of the second gear is formed; a biasing means for biasing the control plate in a backward movement direction; a prohibiting means configured to prohibit the backward movement of the control plate and release the prohibition by the initial movement of the first gear; the control plate is provided with a protrusion that engages with the stop pin so that the stop pin also causes the control plate to move forward; and the first gear A cassette deck characterized in that a portion that should mesh with the gear transmission mechanism immediately after initial movement has missing teeth in a predetermined range.