JPS6182312A - Cassette deck - Google Patents

Abstract

PURPOSE:To facilitate setting timings of reciprocating and rotation of a magnetic head by setting a rotation part of a gear which moves the magnetic head back and forth to a gear, which rotates the magnetic head, to 1:1. CONSTITUTION:A head driving mechanism which drives a head base 47 is constituted with a gear 33, a control plate 39, etc. A head rotating mechanism which rotates a magnetic head 49 is constituted with a gear 34, a moving plate 52, a lever 53, a slide part 56, a sectorial gear 59, a gear 61, etc. The head base 47 is moved back and forth once when the gear 33 is rotated at 360 deg., and the head 49 is rotated at 180 deg. when the gear 34 is rotated at 180 deg.. The rotation ratio of the gear 33 to the gear 34 is set to 1:1. Thus, sure and optimum mutual timings between reciprocating and rotation of the head 49, and timings of both operations are set very easily.

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to Karen 1 decking. In recent years, cassette decks have been increasingly becoming smaller, and there is a strong demand for smaller cassette decks, especially for vehicle-mounted cassette decks, as there is a limit to the space in which the cassette deck can be accommodated. Furthermore, when playing back a 41 rack type magnetic tape that has been recorded in both forward and reverse directions, the cassette half is usually reversed and replaced as soon as playback in one direction is completed. A cassette deck with a built-in so-called O1-reverse mechanism has been developed to eliminate this hassle. J:<As is known, the O1-reverse 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 for switching between forward and reverse magnetic heads have already been proposed. For example, when playing back a 4-track magnetic tape, a 4-channel magnetic head is provided and each of 2 channels and 11 channels of the 4 channels are played back. There is a type in which the tape is electrically switched according to the forward and reverse running of the tape, and a type in which a two-channel magnetic head is provided and 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, the magnetic head A format in which the image is rotated is adopted. In the magnetic head rotation type, the magnetic head is once moved in a direction substantially perpendicular to the tape transport direction, the magnetic head is rotated after being separated from the magnetic tape, and then the magnetic head is made to move back. Abutment against the magnetic tape is performed. In already developed cassette decks, there is a drive source for rotating the magnetic head, and a drive source provided separately from the drive source for causing the magnetic head to reciprocate in a direction substantially perpendicular to the tape transport direction. At least two drive sources were provided. Therefore, it has been a problem to reduce the size and cost of the entire Kahit deck. Summary of the Invention 4- The present invention has been made in view of the above points, and its purpose is to provide a cassette deck that is easy to downsize as a whole and is inexpensive. The cassette deck according to the present invention includes a head stand that can reciprocate in a direction substantially perpendicular to the tape transport direction, and two angular positions on the head stand about an axis substantially parallel to the moving direction of the head stand. a magnetic head rotatably provided between the magnetic heads; a tape transport direction switching means that determines a tape transport direction corresponding to the angular position of the magnetic head; and a first gear that reciprocates the head stand by rotation. a head rotation mechanism including a second gear that rotates the magnetic head by rotation; and a gear transmission mechanism that can mesh with the first and second gears; a rotational force applying mechanism that applies a rotational force from one drive source, and a trigger means for causing the second gear to mesh with the gear transmission mechanism after the first gear meshes with the gear transmission mechanism. is provided, and 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 a control plate formed with a regulating portion that engages with a second gear to restrict 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 position is reached and to release the prohibition by the initial movement of the first gear, and the first and second gears are meshed with the gear transmission mechanism. When the first gear rotates 360 degrees, the head stand performs forward and backward movements, and the second gear rotates 180 degrees.
The magnetic head is rotated by 180 degrees, and the rotation ratio of the first and second gears is 1.
:1. Below, a cassette deck as an embodiment of the present invention is attached.
This will be explained with reference to the drawings. In the figure, reference numeral 1 indicates the entire cassette deck. As shown in Fig. 1, the front side of the housing 2 has a rectangular horizontally elongated hole [1 part 2a] for inserting a cassette half (described later).

[) is being done. A [1] The front here refers to the direction indicated by the arrow Y in the figure, and the left and right direction refers to -b towards the front. 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, a chassis 3 made of steel is installed inside the housing 2. Also shown in FIG. , sea urchin,
A pair of reel units 5 are arranged side by side in the front-rear direction on the chassis 3, and are rotatably mounted on the chassis. As is clear from FIG. 11, the reel unit 5 has a rotating shaft 5a fixed to the chassis 3. A reel 5b is rotatably fitted onto the rotation support shaft 5a. A collar 50 and a bush 5d are fitted to the -L end and lower end of the reel 5b, respectively. The collar 50 can be fitted into a cassette reel which is housed in the cullet half and is wound with magnetic tape. A disk-shaped enlarged diameter portion 5e is formed in the center of the reel 5b, and a double gear 5f having two large and small gear portions is disposed between the enlarged diameter portion and the bush 5d. , are rotatably mounted on the rotating support shaft 5a. A coil spring 5g is interposed between the double gear 5f and the bush 5d to bias the double gear and the bush away from each other. Further, a felt plate 5h is provided between the enlarged diameter portion 5e of the reel 51) and the double gear 5r. The felt plate 5h 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 upper surface of the enlarged diameter portion 5e and the collar 5C, and one end of the arm 51 is rotatably attached to the outer periphery of the reel 5b. The lower and upper surfaces of the arm 51 are rotatably engaged with the enlarged diameter portion 5e and collar 50 of the reel 5b via washers 5j and 5k.
A coil spring 5Q is arranged between the upper washer 5 and the arm 51 to urge 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 substantially in the front-rear direction. The intermediate lever 7 has a rectangular opening 7b formed at its front end.
A bottle 8a protruding from the center of a floating lever 8 freely movable on the chassis 3 is loosely fitted into the opening. The floating lever 8 has pins 8b protruding from both ends thereof, and each pin is slidable into a long hole 5m formed at the free end of the 7-mm 51 of the reel unit 5. engaged. As shown in FIGS. 7 and 18, an end detection lever 10 is disposed near the rear end of the intermediate lever 7. As shown in FIGS. The end detection lever 10 is connected to a sub-chassis A that is fixed to the upper surface of the rear end of the chassis 3 and protrudes upward.
The upper end of the lever A12 is pivotally attached to the right end of the lever A11, in this case the right end of the lever A12. 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 bin 10b is protruded from the rear surface of the upper end of the end detection lever 10, and the bin is rotatably attached to the subchassis 8. Further, it engages with an end detection gear 14 facing the rear end surface of the end detection lever 10. As is clear from FIGS. 7 and 18, a recess 14a is formed on the surface of the end detection gear 14 facing the end detection lever 10, and a recess 14a is formed on the circumferential surface of the recess that protrudes in the radial direction of the end detection lever. Three substantially mountain-shaped protrusions 14b having the same shape are provided at a pitch of 1200. Moreover, three protrusions 14C having the same shape are formed in the center of the four parts 14a and extend radially toward the valleys between the above-mentioned mountain-like protrusions 14b. A circle circumscribing the top of each protrusion 14b and each protrusion 14c
The diameters of these fields are approximately the same size, assuming that the circle is located inside the top of the field. The bottle 10b protrudingly provided on the end detection lever 10 can engage with these protrusions 14b and protrusions 14.0. 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 FIGS. 2, 7, 9, and 18, the end detection gear 14 is located on the rear surface of the rib chassis 11.
On the left side are four gears 16.17.1 meshing in series.
A gear transmission mechanism 20 consisting of gear transmission mechanisms 8 and 19 is installed, and the end detection gear 14 meshes with the R final stage gear 19 of the gear transmission mechanism. 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. It meshes with 22. A pulley 23 is integrally formed at the lower end of the worm 22. As shown in FIG. 10, the pulley 23 is
It is rotationally driven via bells 1 to 25 by a motor 24 disposed at the right rear end of the chassis 3. In addition, belt 2
5 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 wound 17 times around a pair of flywheels 27 that are rotatably provided on the lower surface of the V-shelf 3 and arranged one behind the other. However, the rotation direction of the motor 24 is such that the direction of arrow M is the forward rotation direction, and 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 0 and P, respectively. A belt 25 is passed around the belt. The flywheel 27 has gear portions 27a and 27b of different sizes on its outer and inner circumferences. flywheel 2
Of the two large and small gear portions formed in the reel unit 7, the smaller gear portion 27b is configured to mesh with the large diameter gear portion of the double gear 5f of the reel unit 5 via a pair of front and rear idler gears 28. As is clear from FIGS. 2, 3, and 9, the idler gear 28 rotates at one end of a support lever 30 that is swingably provided on the chassis 3 via a shaft member 30a. The reel unit 5 can be freely attached, and the reel unit 5 is
This is done for double gear 5f. Further, the support lever 30 is biased by a coil spring 30b in a direction in which the idler gear 28 approaches the double gear 5[. As shown in FIGS. 2, 7, 9, and 18, a first gear 33 and a second gear 34 are rotatably mounted on the rear surface of the subchassis A11 in the negative direction of the gears 16 to 19. installed. The first gear 33 meshes with the gear 16 of the gear transmission mechanism 20 (see FIG. 7, for example),
The second gear 34 meshes with the 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.
A rotational force applying mechanism is configured to apply rotational force from the motor 24 as a single drive source to the third and second gears 34. 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 the 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 rope plate is attached to the front surface of the bent portion 3a so as to be movable in the left-right direction. The leftward movement limit position of the control plate 39 by 13 is referred to as the maximum forward movement position of the control plate, whereas the rightward movement limit position is referred to as the maximum return movement position. A coil spring 40 is connected to the right end of the control plate 39 for biasing the control plate to the right, that is, in the backward movement direction. A protrusion 39a that can be engaged with the pin 33a of the first tooth member 33 is formed at the upper end of the control plate 39 at approximately the center thereof. The projection 39a engages said pin 33a at its right edge and thus controls the control 11.
11 + & 3 '9 is the 11th! It is caused to move forward by the rotation of the ii wheel 33. 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 41, and moves to the left as the control plate moves forward. A lever 84.2 is arranged. At the right end of the lever B42 is a protrusion 42 that engages with the right edge of a protrusion 39b formed at the lower end of the control plate 39.
a is formed, and as a result, as the control plate 39 moves back due to the biasing force of the coil spring 40, the lever B
42 also returns to the right side. Figures 2 and 8
As is clear from the drawings and FIG. 10, the left end portion of the lever 842 is provided extending back and forth on the lower surface of the chassis 3, and is rotatably attached to the chassis 3 at its center via the bin 44a. It is pivotally attached to the rear end of the lever C44. The front end of this lever C44 is connected to a head stand 47 provided on the chassis 3 so as to be able to reciprocate in the left and right direction.
It is centered on Note that the magnetic tape is driven in the front-rear direction, and therefore, the moving direction of the head stand 47 is approximately perpendicular to the tape transport direction. The above-described first vehicle 33, control plate 39, coil springs 40, 41, lever B42, lever C44, etc.
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 other related members will be explained. The second gear 34 is for rotating the magnetic head 49 provided on the head stand 47, and -C1 first
It is arranged at a position farther from the head stand 47 than the gear 33. Further, the rotation ratio of the first gear 33 and the second gear 34 is 1:1. As is clear from FIGS. 7 and 18, the second gear 34
Two stop bins 34a and 34b are protruded from the rear surface with a pitch of 180°, and one stop bin 34a passes through the second gear so as to also protrude from the front face of the second gear. ing. In addition, Tsububin 34 to both sides 1
a' and 34b can engage with the right edge of a protrusion 390 protruding from the rear end of the control plate 39. That is, the control board 3
One can also be moved forward by the two stop bins. Further, a claw member 51a and a spring member 511) are provided near the second gear 34, and the second gear 34 is urged in the ff+ direction in FIG. 18 by the claw member and spring member. . As shown in FIG. 18, a movable plate 52 made of a steel plate is attached to the rear surface of the sub-chassis A so as to be reciprocating in the left-right direction. At the right end of each of the movable plays 1 to 52, claws 52a and 52b are formed on the front surface of the second gear 34 and can be engaged with the protruding stop bin 34a. The claw portion 52a is attached to the stop bin 34 at its right edge. The left edge of the claw portion 52b engages with the stop bin 34a. That is, the moving plate 52 is moved by the second gear 34
It reciprocates by rotating 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 upper surface of the chassis 3. Further, the lever 1) 53 is click-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. Also,
The front end of the lever D53 is attached to a slide member 56 (fifth
(also shown in the figure) is pivotally attached to the rear end. As shown in FIGS. 2, 5, and 9, the magnetic head 49 is disposed to the right of the slide member 56. As shown in FIGS. The magnetic head 49 is rotated by a bearing member 57 fixed on the head stand 47 about an axis parallel to the moving direction of the head stand/17, that is, about an axis perpendicular to the magnetic tape contact surface of the magnetic head. It is rotatably supported. The rotating shaft portion of the magnetic head 49 is made of Diekirest alloy,
On the other hand, the material of the bearing member 57 that fits into the rotating shaft portion 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 by 180 degrees from the first angular position will be referred to as the second angular position of the magnetic head. . The magnetic head 49 is located between the first angular position and the second angular position.
It is rotatable between angular positions. A fan-shaped gear 59 is disposed at a position sandwiching the slide member 56 together with the bearing member 57, and is rotatably attached to the front end of the bearing member 57 at the fan-shaped portion. However, in order to prevent the joint between the fan-shaped gear 59 and the bearing member 57 from interfering with the reciprocating movement of the slide member 56, the slide member 56 has an elongated hole 56a into which the joint is loosely fitted.
is provided extending in the front-back direction. Note that the fan-shaped gear 59 is click-biased by a coil spring 60 at Jζ. A pin 59a is protruded from the right end surface of the fan-shaped gear 59, and the pin 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.
Head rotation I for rotationally driving the magnetic head 49 by the gear 61 and related small peripheral members.
The structure is configured. Further, the head rotation mechanism and the above-described head stand drive mechanism are collectively referred to as a control mechanism. Regardless of the size, the control Ij! The head stand 47 is caused to reciprocate by the i structure, and the old magnetic head 49 is caused to rotate. As understood from the above explanation, the first gear 33 rotates 360 degrees, causing the head stand 47 to move forward and backward, and the second gear 34 rotates 180 degrees. magnetic head 49 by
is rotated by 180°. 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 64 is made of a steel plate and has flexibility. The regulating member 64 is formed symmetrically in the front-rear direction, and its center portion is fixed to the top of the head stand 47, and both front and rear ends extending in directions away from each other around the center portion serve as magnetic heads. It is possible to engage with the outer peripheral part of 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 49 protruding from the outer periphery of the head 49
By engaging with a, rotation of the magnetic head 49 is restricted. Note that an opening 64a is provided on the upper surface of the regulating member 64 so that the protrusion 49a of the magnetic head does not come into contact with the regulating member 64 when the magnetic head 49 rotates. 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 6
5 and the spring 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. That is, by tightening or loosening the pair of screws 65, the angle of the magnetic head 49 can be adjusted individually at the two angular positions. Note that the same effect can be obtained by dividing the regulating member 64 at its center into two members and fixing each member in a cantilever shape to the head stand 47 directly above the magnetic head 49. It will be done. However, by making the above-mentioned regulating member an instep member having a front-back symmetrical shape, the number of parts is reduced, and the number of assembly steps is also reduced, contributing to a cost reduction of 1. The story goes back and forth, but for example, as shown in FIG. 18, the first gear 33 is provided with two toothless parts 33C and 33d symmetrically with respect to a partial tooth part 33b having about three teeth. . When the first gear 33 is in the operating front side 1, the missing tooth portion 33C corresponds to the gear 16 (a part of the gear transmission mechanism 20), and the partial tooth portion 33C corresponds to the gear 16 (part of the gear transmission mechanism 20). The portion 33b is restricted from biting into the gear 16. On the other hand, the second gear 34 also has a 180
Two toothless parts 34C and 34d are formed with a pitch of °, and when the second gear is in a stationary state before operation, the toothless part 340 is connected to the gear 18 (a part of the gear transmission mechanism 20).
The toothed part corresponds to gear 1 as described later.
The rotation of the second gear is regulated so as not to enter the gear 8. 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). ing. 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 engagement recess 69a that can be engaged with a pin 39e protruding from the front surface of the central portion of the control plate 39. In addition, the prohibition lever 69 is
is biased clockwise in FIG. 17. 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 33 [that can be engaged with b] is formed. That is, when the first gear 33 initially moves, the protrusion 33'' of the first gear engages with the engagement protrusion 69b, and the prohibition lever 69 swings in the counter-clockwise cutting direction in FIG. A 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, and the f that urges the control plate in the backward movement direction (rightward)
The coil spring 40 and the first gear 3
a coil spring 35 as a biasing means for biasing the first gear in a direction in which the partial tooth portion 33b of No. 3 meshes with the gear 16 (a part of the gear transmission mechanism 20); and a right tooth portion of the second gear 34. a claw member 51 as a biasing means that biases the second gear in a direction in which the second gear meshes with the gear 18 (a part of the gear transmission mechanism 20);
a, the spring member 51a, and surrounding small members related thereto, when the first gear 33 and the second gear 34 start rotating, the second gear 37I is moved into gear after the first gear 33 meshes with the gear 16. Trigger means is configured to engage with 18. 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 also protrudes from the front surface of the first gear by a predetermined amount 26, and is attached to one end of the start trigger lever 73. The portion 73a is adapted to engage with this portion protruding from the front surface, thereby restricting the rotation of the first gear 33. A second end portion 73b formed on the start 1 to trigger lever 73 and extending to the right engages with the left end portion of the lever A12 from the lower surface of the left end portion. That is, the second end 73b of the start trigger lever 73 is engaged with the end detection lever 10 via the lever A12, and when the end detection lever 10 moves upward, the start trigger lever 73 rotates clockwise in FIG. 18, and the rotation restriction state of the first gear 33 is released. The start trigger lever 73 has a third end 73C 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 and right direction, and is made of a steel plate, with a total of 1-
It is formed into a letter shape. That is, the start trigger lever 73 is configured to rotate clockwise in FIG. 18 by moving the magnetic head switching command rod 75 to the left. Also, the first
As shown in FIG. 0, near the head switching command rod 75, there is a coil spring 6 that applies a rightward bias to the third end 73c of the star 1 to trigger lever 73.
is installed. As shown in FIGS. 2, 3, and 17, an electromagnetic solenoid 77 is located near the motor 24.
are arranged extending left and right, and are fixed on the chassis 3. Movable rod 7 of electromagnetic solenoid 77
7a projects to the right with respect to the solenoid main body, and a pin 77b extending in the vertical direction is fitted at the tip of the movable rod. The lower end of the bottle 77b is inserted into a long hole 3C extending in the left-right direction on the main surface of the chassis 3.
It is fitted and engaged with the right end of the magnetic head switching command rod 75. That is, by pulling the movable Ron door 7a of the electromagnetic lens 77, the magnetic head switching command rod '75 moves to the left (therefore, the start trigger lever
73 (rotated clockwise in FIG. 18). Also, as shown in Figure 1,
An operation switch group 79 is arranged on the front side of the housing 2 and to the right of the opening 2a, and the switch at the back of the operation switch group serves as a switching command switch for activating the electromagnetic solenoid 77. ing. Second
As shown in Figures 4, 10 and 17,
Rear end bent portion 3 of chassis 3 with control plate 39 attached
A moving member 81 is attached to the front surface of a to be movable in the same direction as the control plate, that is, in the left-right direction. This moving member 81 is placed in a position where it is sandwiched between the bending portion 3a and the control plate 39. 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. That is, 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, as the moving member B1 moves to the left, the lever E83 rotates clockwise 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 39g formed at the rear end of the control plate 39. and four parts 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 390, When the control plate 39 is in the position, the return of the control plate 39 to the most backward movement position is restricted. As mentioned above, when the control plate 39 is not at the most backward movement position, the locking portion 39d formed on the control plate engages with the stop pins 34a and 34b of the second gear 34, and the second gear is rotated. Rotation is regulated. As shown in FIGS. 2, 3, 9, and 17, another electromagnetic solenoid 86 is arranged above the electromagnetic solenoid 77 in parallel with the electromagnetic solenoid.
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 at the tip of the movable rod. This bottle 86b is
a third end 8 formed on the lever E83 and extending upward;
It is pivotally attached to the tip of 3d. In addition, the movable rod 86
The pin 83G of the lever E83 engages with the rear end protrusion 39 (I) of the control plate 39 when the lever E83 is in its protruding position (the position shown in FIG. 17).The electromagnetic solenoid 86 is It is activated by operating the key of the car in which the cassette deck is installed, and when the key is in the on state, the movable rod 8 of the electromagnetic solenoid 86 is activated.
6a is pulled in as the movable member 81 moves to the left and is fixed at the retracted position, so that the pin 83c of the lever E83 engages with the rear end recess 39h of the control plate 39. . Furthermore, when the key is in state A), the movable rod 86a is pulled out by the biasing force of the coil spring 82 which moves the moving member 81 to the right.
Therefore, the pin 830 of the lever E83 engages with the rear end protrusion 399 of the control plate 39. The above-mentioned moving member 81, coil spring 82, lever E83, coil spring 84, electromagnetic solenoid 86, and surrounding small members related to these move the control plate 39 to the maximum return position when the power is turned off. A prohibition/cancellation means is configured to prohibit a return to the rightward movement limit position and to cancel the prohibition when the power is turned on. Next, a tape transport direction switching means for switching the transport direction of the magnetic tape will be explained. As shown in FIGS. 2, 3, and 9, the shaft member 30a of the support lever 30, which rotatably holds the idler gear 28, is connected to the capstan. Note that, as shown in FIG. 10, this shaft portion U30a is attached to the flywheel 2.
-b iK with the rotation support shaft of 7. On the other hand, as is particularly clear from FIGS. 3 and 5, a pair of support shafts 89 extending upward is provided on the chassis 3 in the vicinity of the capstan 30a. A pinch roller 90 is rotatably attached to the free end (a pulled arm member 91 is rotatably attached). The pair of pinch rollers 90 are each detachable from the capstan 30a. A bottle 91a is fixed to the free end of the arm member 91 and passes through the arm member in the vertical direction, and a spring for adjusting the azimuth of the magnetic head 49 is attached to the lower end of the left edge of the bottle. 66 (for example, see FIG. 5) is engaged with one end of the arm member 91.
The pinch roller 90 is urged by the spring 66 in a direction toward the capstan 30a. The capstan 30a described above, the pinch roller 90,
The reel unit 5, the idler gear 28, and peripheral small members related thereto constitute a tape transport direction switching means that determines the tape transport direction corresponding to the two rotational angular positions of the magnetic head 49. Each bottle 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 specifically, two notches 56 are formed at the front and rear ends of the slide member 56, each extending in the front-rear direction and having open ends facing each other.
c is provided, and either one of the pins 91a of the arm member 91 can be selectively engaged in the notch 56c as the slide member 56 reciprocates. A tapered portion 56d is formed at the front edge of the open end of each notch 56c, and the bottle 91a is smoothly guided into the notch 560 by this tapered portion 56d. When the pin 91a engages with the notch 56C, the arm member 91 is rotated a predetermined amount to the left, and the pinch roller 90 is moved from the carrier 34 to the pin 30'a. That is, the pair of pinch rollers 90 are alternatively pinched from the capstan 30a by the reciprocating motion of the slide member 56, which is a component of the head rotation mechanism described above.It is particularly clear from FIG. As shown, mountain-shaped protrusions 47a are formed at both left and right ends of the head stand 47 that supports the slide member 56, with pointed portions facing each other. Four parts 47b continuous to the protrusion
is formed. These protrusions 47a and recesses 47b 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 47 moves to the right. . The protrusion 47a formed in a mountain shape is the bottle 3.
When the support lever 30 is engaged with the support lever 0d, the idler gear 28 swings in the direction in which it is detached from the double gear 5 of the reel units 1 to 5.
Further, following the protrusion 17a, the recess 47b is the bottle 30 (1
When fully engaged, the idler gear 28 becomes the double gear 5''.
The support lever 30 is configured to return to a position where it engages with the support lever 30. 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 bins 30d and prevents the bin from entering the four portions 47b of the head stand 47. However, each protrusion 56e is attached to a pair of bins 30 according to the forward and backward movements of the slide member 56.
It is designed to engage with only one of d. That is, the pair of idler gears 28 are configured to be selectively removed 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, there is a subchassis B95 on the upper surface of the right end of the chassis 3.
is permanently installed. A swinging member A96 extending in the left-right direction is disposed on the chassis 3, and a swinging member A96 is provided on the rear end of the chassis B95 and the support protrusion 3d provided at the left rear end of the chassis 3. Mounted so that it can be swung freely [
It is being rejected. A holder 98 is attached to the free end, that is, the front end, of the swinging member A96 to be able to swing freely at the center in the front and back direction of the cassette 1 that holds the cullet half. Note that, for example, the position of the cullet holder 98 shown in FIG. 5 is referred to as the raised position of the cassette holder. The cassette half is inserted into the cassette holder 98 in this position from the direction of arrow S, and is held in the cassette 1 to holder. Further, from this state, the swinging member 96 swings downward by a predetermined angle, and the position of the cassette holder 98 when the cassette half held by the cassette holder 98 is positioned at the performance position is changed from the position of the cassette holder 98 to the cassette. This is called the descent position. The cassette holder 98 is movable between this lowered position and the above-mentioned raised position. A movable member 101, which consists of two members, an upper surface member 99 and a right surface portion 11100, and which engages with the cullet half and is movable in the insertion and ejection direction of the cullet half, that is, in the front-rear direction, is attached to the lower surface of the cassette 1 to the holder 98. It is being A bottle 100a is protruded from the right side of the right side member 100, and the bottle is slidably fitted into a long hole 95a formed in the sub-chassis 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 sub-chassis 95.
2 is swingably attached at its lower end, and the upper end of the lever F is pivoted to the bottle 100a. A coil spring 103 is connected to the lever F102, which biases the lever F clockwise in FIG. 13, thereby imparting a bias force to the moving member 101 in the cassette half ejecting direction, that is, forward. Right side member 10
A recess 100b that recesses downward is formed in the front end of the right side member 10 when the cassette half is inserted.
0 moves rearward, the pivot shaft 98a of the cassette holder 98 falls into the recess 100b, and the cassette boulder moves to the lowered position. A coil spring 104 is connected to the right end of the swinging member A96 to bias the swinging member clockwise in FIG. 13. As the moving member 101 moves in the insertion direction (rearward) of the cartridge holder 7, the cassette holder 98 is urged by the coil spring 103 toward the lowered position J in the direction t. As is clear from FIGS. 12 and 74, the moving member 10
The upper surface member 99 of 1 has a protrusion 99c facing the reel hole 106 of the cassette half to be inserted, and a spring member 99d that biases the cassette half upward so that the protrusion 99c protrudes into the reel hole 106. and is provided. Note that the protrusion 99c is formed integrally with the upper surface member 99 by stamping or the like. In this way, the protrusion 99
By integrally forming C on the surface member 99, there is no need to attach special parts to the upper surface member 99 in order to provide the protrusion, the number of parts and the number of man-hours for installation are reduced, and costs are reduced. It is planned. The upper surface member 99 is also formed with another protrusion 99e that engages with the force cellars 1 to 1/2 in the vicinity of the reel hole 106. Like the above-described protrusion 99c, this protrusion 998 is also integrally formed on the upper surface member 99 by punching or the like, and therefore, the loss is reduced for the same reason as above.
-Efforts are being made to reduce Note that the protrusion 99e is
A recess 10 called a label area formed in the half
7 is engaged. In this way, by engaging the protrusion 99e with the recess provided in the cassette half,
This makes the state of engagement of the protrusion 99e with the frame 1-half firm. In the cassette deck, the cassette half is inserted into the cassette holder 98 along its longitudinal direction. In addition, the above-mentioned control mechanism, that is, the head stand 4
A control mechanism for reciprocating the magnetic head 7 and rotating the magnetic head 49 is arranged near the deepest part of the cassette holder 98. Next, FF 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 this bent portion 3f has a The number bushing V-shi C111 also shown in FIG. 15 is fixed. The Zabu chassis C111 has a pair of longitudinal operation levers 113 and 114 that extend in the front-rear direction and are stacked vertically.
It is attached 11 so as to be able to reciprocate in the ll direction. The front end portions, that is, the operating end portions of the eight longitudinal operating levers are separated by a predetermined distance of 1 liter on the left and right, and each of the operating ends 8
14 is an operation button 1 provided on the front of the housing 2.
15.116 (shown in the first diagram) is attached. The longitudinal operation lever 113 disposed below is for forward movement, that is, backward movement, to perform the FF operation.
Further, the longitudinal operation lever 114 provided above is used to perform a REW operation by its forward movement. Each of these longitudinal operation levers 113 and 114 is arranged above the magnetic head 49. In addition, the cylinder longitudinal operation lever 113.11
4 is fixed to the front 41 by fill springs 118 and 119.
Each is given a Paiska on the other hand. As is particularly clear from FIGS. 7 and 15, on the left side of the rear end of the longitudinal operation levers 113 and 114, there is a
A tapered portion 113a that can be engaged with the upper end portion of the longitudinal bin 121 protruding from the top when the head stand is moving to the right.
, 114a are formed. 'That is, the head stand 4
7 is moving to the right, these longitudinal operating levers 1
By pressing either 13° or 114, the head stand 4
'7 is moved to the left by a predetermined amount, thereby moving the magnetic head 49 away from the magnetic tape. Furthermore, when the head stand 47 is moved a predetermined amount () to the left by operating the longitudinal operation lever in this way, the protrusion 47a formed on the head stand 47 moves the pin of the support lever 30 that holds the idler gear 28. 30d, thereby causing the idler gear 28 to disengage from the double gear 5 [5] to the reel unit 1. Incidentally, although the discussion is a bit off-topic, for example, as shown in FIGS. 3 and 9, a pair of claw members 123 are provided on the chassis 3 to prevent the reel unit 5 from rotating in the opposite direction. When the head stand 47 moves, the right end of the head stand 47 engages with the claw member 123 and pushes it open, thereby releasing the state in which the reel unit 5 is prevented from rotating in reverse by the claw member. Returning to the original topic, as shown in FIGS. 2, 3, and 16, there is a plate 124 on the right side of the rear end of the bent portion 3f formed at the left end of the chassis 3. It is movable in the front and back direction. plate 12
A coil spring 125 is connected to the upper end protrusion 124a of the plate 4. The coil spring 125 provides a forward bias to the plate. A T-shaped lever I-1126 is rotatably attached to the front end of the plate 124 at its center. In particular, as is clear from FIG. 16, the front edge of the first end 126a formed on the lever 1-1126 and extending downward has the longitudinal operating lever 1 as described above.
The rear edge of a protrusion 113G extending downwardly and projectingly abuts on the protrusion 13. Also, lever l-I 126
The rear edge of a protrusion 114G 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 that is formed in the second end 126b and extends downward. That is, by pushing the longitudinal operation levers 113 and 114, respectively, the lever H126 is rotated counterclockwise and clockwise in FIG. 16. A lever 1129 formed in a substantially dogleg shape is arranged in front of the plays 1 to 124, and is rotatably attached to the left bent portion 3r of the chassis 3 at its central bent portion. 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 formed on a third @ portion 126C formed on the lever H126 and extending forward. It is slidably fitted into the elongated 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, the swing lever 130 is disposed extending in the left-right direction at a position where it is sandwiched between the pair of reel units i-5 and the flywheel 27, respectively. The bottle 130a is located approximately in the center of the bottle 130a.
The left end of the swing lever 130 is pivotally attached to the tip of the second pant portion 129C of the lever 129. A gear transmission mechanism 135 consisting of three gears 132, 133 and 134 meshing in series is provided on the lower surface of the right end of the swing lever 130. A gear 134 that can mesh with each gear portion 27a of the flywheel 27 and is the final stage gear.
is adapted to mesh with a small diameter gear portion formed on the double gear 5r of the reel unit 5. Namely. When the longitudinal operating levers 113 and 114 are pressed, the swinging lever 130 is moved through the lever 1-1126.
swings rearward and forward, whereby the reel units 5 disposed at the rear and front are alternatively rotated at high speed, respectively.゛As shown in Figs. 2, 7, 15, and 16, on the sub-chassis 111 holding the longitudinal operating levers 113 and 114, there is a bar located parallel to the pitcher operating levers. An intermediate lever 138 is provided that can reciprocate in the direction of movement (back and forth direction) of both pitcher operating levers. A coil spring 139 is connected to the intermediate lever 138 for imparting a forward bias 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 11.
3. A long hole 140 formed to extend in the front-rear direction at 114
actively engaged in activities. 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 at a predetermined angle about the support shaft 138b on the front end side. Also, the coil spring 139 that biases the intermediate lever 138 forward is The intermediate lever 138 is stretched so as to be tilted to the right toward the front from the center, so that the intermediate lever 138 is extended to the first position with the support shaft 138b as the center.
The counterclockwise direction 46 in FIG. 5 is also biased. 4T That is, when both good-hand operating levers 113 and 114 are simultaneously pushed forward (backward movement), the pin 138a of the intermediate lever 138 moves into the elongated hole 14.
0, and thereby the intermediate lever 1
38 is configured to move rearward. However, if only one of the pair of longitudinal operating levers 113, 114 is moved forward, the rear right edge 140b of the elongated hole 140 formed in the other longitudinal operating lever
is still in contact with the bottle 138a, so the intermediate lever 1
38 forward movement (backward movement) is not performed. Although not detailed, the longitudinal operation lever 1 for FF operation
13 and the longitudinal operating lever 114 for REW operation is provided with a mechanism that locks it in the forward position when either one of the longitudinal operating levers is closed. locking the other longitudinal operating lever in the forward movement position when the other longitudinal operating lever is moved forward;
Also, the one longitudinal operation lever is unlocked. Furthermore, when either of the longitudinal operation levers 113, 114 is pressed, the lever J142 provided at the rear of the two-stage manual operation lever is swung clockwise as shown in FIG. For example, as is clear from FIGS. 2 and 7, a pin 138 d is provided protruding from the upper surface of the rear end of the intermediate lever 138, and the pin 138 d can directly engage with the left end 96a of the swinging member 96 (for example, shown in FIG. 6).By moving forward, the intermediate lever 138 pushes the swinging member 96 rearward, and the cassette in the lowered position described above This is for moving the holder 98 to the raised position.Next, various switches provided in addition to the mute switch 143 and their arrangement will be explained.As is clear from FIGS. 2 and 6, the subchassis B
A bracket 146 is attached to the right end surface of the cassette 95, and two switches 147 and 148 are mounted on the bracket. The switch 148 is for operating the motor 24. Both the switches 147 and 148 are used to switch the power supply from the power supply C to the holder 98. It is mechanically activated when the cassette half is inserted into the cassette half. 149 is fixedly installed. This switch 149 is operated by engagement of the moving plate 52 attached to the rib chassis 8. Also, as shown in FIG.
A switch 150 for cutting off the power supply to the cabinet 1 to the deck is fixed on top of the cabinet 1, and is operated when the intermediate lever 138 is moved forward (moved backward). 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 cullet half 155 (shown in FIG. 19) through the opening 2a of the housing 2 shown in FIG.
As shown in FIGS. 21 to 21, the half of the curry 1 is held in a cassette holder 98. As shown in FIG. 20, the cassette half 155 is attached to the cassette holder 9.
By being inserted into the cassette holder 8, the right side portion +4100 moves rearward, and as a result, the pivot shaft 98a of the cullet holder 98 falls into the recess 100b of the right side member 100, and the cassette holder is moved to the lowered position. Therefore, the half is placed in the playing position. Along with this cullet half insertion operation, the switches 147 and 148 shown in FIG.
starts rotating. When the motor 24 rotates, the first:0
As shown in the figure, the small pulley 24a is rotated in the direction of arrow M, 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. Accordingly, the units start rotating in the directions of arrows Q and R (as shown in the 10th figure), respectively, via the pair of idler gears 28, respectively. In this way, a pair of glue units 1 to 5
Since the 7J set half 155 rotates in opposite directions, the slack in the magnetic tape in the 7J set half 155 is taken up. When the slack in the magnetic tape is wound up and a predetermined tension is applied to the magnetic tape, all of the constituent members of the reel unit 5 shown in FIG. It is fixed by the reaction force of the tension, and only the double gear 5f continues to idle with respect to these fixed members via the felt plate 5h. Therefore, the magnetic tape is not transported with the tension applied to it. On the other hand, the first-end detection gear 14 shown in FIGS. 7 and 18, for example, is activated by the gear transmission mechanism
0 in the counterclockwise direction 81 in FIG. 18. Therefore, the bin 10b protruding from the end detection lever 10 is moved to the top of the mountain-like protrusion 14b of the end detection gear 14 as the end detection gear 14 rotates. 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 sliding along the mountain-like 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 lever A
12, the start trigger lever 73 is rotated clockwise in FIG. In this way, the first gear 33, whose rotation was restricted due to the engagement of the pin 33a with one end of the start trigger lever 73, becomes rotatable, and the biasing force of the fill spring 35 causes the first gear 33 to rotate.
It is rotated clockwise in the figure. Therefore, the first
The partial tooth portion 33b of the gear 33 meshes with the gear 16, and the first
The gears begin to turn. The rotation of the first gear 33 causes the first
The control plate 39 shown in FIG. 7 is moved to the left, so the head stand 47 is moved to the right as shown in FIG. 22, and the magnetic head 49 comes into contact with the magnetic tape. In addition, the control plate 39 that has reached the forward movement position (leftward movement limit position)
When the engagement recess 69a of the prohibition lever 69 engages with the pin 39e protruding from the control plate, its return movement (movement to the right) is prohibited. As the first gear 33 rotates, the moving member 81 also shown in FIG.
3. Move to the left as shown in the figure. Therefore, lever E8
3 rotates in the forward and backward directions 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. This action causes lever E8 to
The third pin 83c comes to engage with the recess 39h formed at the right end of the control plate 39, and therefore the control plate 39 can be moved to the most backward movement position (rightward movement limit position). Further, the control plate 3 is located in the engagement recess 69a of the prohibition lever 69.
By entering the bottle 39e of No. 9, the prohibition lever 6
9 rotates by a predetermined amount in one direction at a time as shown in Figure 23,
The mute switch 143, which has been turned on by the upper end of the prohibition lever via the lever J142 (see, for example, 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 5, and only the rear reel unit 5 is rotated. Become. Note that this operation is performed by the protrusion 47a and recess 47b formed on the head stand 47, and the protrusion 56 provided on the slide member 56.
It depends on the interaction with 'e, but since it was explained in detail in the previous explanation of the configuration, I will not explain it 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 is connected to the corresponding cap. Remains detached from stun. this is,
This is because the pin 91a protruding from the arm member 91 supporting the front pinch roller 90 is fitted into the notch 56c of the slide member 56. Similarly, as shown in FIG. 22, by moving the head stand 47 to the right, the pair of claw members 123 that have been engaged with the reel unit 1-5 are disengaged from the reel unit 1-5. In this way, tape transport to the FWD side is started, and the FWD
Regeneration of the D side is performed. Next, the operation of switching from reproduction on the [WU') side to reproduction on the REV side will be explained. When the switch for switching the tape transport direction is pressed, the electromagnetic solenoid 77 is turned on, and the movable rod 77a of the electromagnetic solenoid is pulled. Therefore, the start trigger lever 7 is activated via the magnetic head switching command rod 75.
3 rotates in the 81 direction as shown in FIG. As a result, the first gear 33, whose rotation was restricted by the start trigger lever, becomes rotatable, and is rotated clockwise in FIG. 18 by the biasing horn of the coil spring 35. The partial tooth portion 33b of the 1st gear 33 meshes with the gear 16, and the 161st gear begins to rotate. Immediately after the 1st gear 33 starts rotating, the protrusion 33f protruding from the 1st gear engages the prohibition lever 69 ( (See Figure 17)
engagement protrusion 691] to move the applicable prohibited 1F lever to the 17th
Rotate V in the counterclockwise direction in the figure. Then, the engagement state between the engagement recess 69a of the prohibition lever and the pin 39e of the control plate 39 is released, and the control plate 39 is disengaged from the coil spring 4.
The biasing force of 0 instantly returns it to the most backward movement position (rightward movement limit position). 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 separated from the magnetic tape. When the control plate 39 is in the forward movement position (leftward movement limit position), the stop pin 34a is engaged with a regulating portion 39d (for example, shown in FIG. 4) formed on the control plate.
Second gear 37! I times t) + rules aIiii. This restriction is released by returning the control plate 39 to the above-mentioned most backward movement position, and, for example, the claw member 51a shown in FIG.
and spring member 511), the second gear 34 is rotated clockwise as shown in FIG. Therefore, the toothed portion of the second gear 34 meshes with the gear 18, and the second gear 34 meshes with the gear 18.
The gears begin to turn. As the second gear 34 rotates, the stop pin 34a protruding from the second gear engages with the claw portion 52a of the movable plate 52, and the movable plate is moved to the left and connected to the movable plate. The magnetic head 49 is rotated 180° toward the REV side. Further, the switch 149 is set to FWD by moving the moving plate 52 to the left.
It can be switched from the REV side to the REV side. Due to the rotation of the second gear 34, the stop pin 34a of the second gear is rotated by the protrusion 39G formed on the control plate 39 (
17 etc.), and the control plate is moved a predetermined distance i-j to the left by the stop bin. Second
When the gear 34 completes its 180° rotation, the stop pin 348 separates from the protrusion 39c of the control plate 39, but then the pin 33a of the first gear 33 engages with the protrusion 39a of the control plate 39. Then, it is moved to R& (leftward movement limit position) and locked by the inhibition lever 69 as described above. The forward movement of the control plate 39 moves the head stand/17 to the right again, and the magnetic head 49 comes into contact with the magnetic tape. Furthermore, the mute switch 143 is also turned off in the same manner as described above. Furthermore, 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, the rear idler gear 28 is separated from the reel unit 5, and the front idler gear 2
8 is engaged with the reel unit 5, and only the front reel unit 5 starts rotating. Further, the front pinch roller 90 is brought into contact with the capstan 30a, and the rear pinch roller 90 is held separated from the capstan 30a. In this way, the tape transport direction is switched from the FWD side to the RFV side.In addition, regarding the operation of switching the tape transport direction from the REV side to the FWD side, the stop bin 341 of the second gear 34
) engages with the claw portion 52b (shown in Figure 18) of 52 on the movable plate 1 and moves the movable plate to the right. It is the same and will not be described. Next, the operation of the mechanism that automatically switches the tape transport direction will be explained. For example, when the tape transport to the FWD side is completed, a predetermined tension is applied to the magnetic tape at the end, and the double gear 5f of the components of the reel unit 5 shown in FIG.
All members except for are fixed by the reaction force of the tension. Therefore, only the double gear 5 [continues to idle] with respect to these fixed members via the felt 1 to the plate 5h.When the tape is being transported to the FWD side, the above-mentioned fixed members The group is also rotating except for the arm member 51. Also, the arm member 51 receives a biasing force caused by the rotational force, and is biased counterclockwise in FIG. 22 by the intermediate lever 7 via the floating lever 8. As a result, the end detection lever 10 to which the rear end of the intermediate lever is pivoted is urged to rotate in the counterclockwise direction in FIG. slides in contact with the mountain-shaped protrusion 14b of the end detection gear 14, and the protrusion 14C of the end detection gear and the bottle 10b do not engage.However, among the reel units 1 to 5, the members excluding the double gear 5f When the tape stops and the group becomes fixed, the force acting on the end detection lever 10 disappears, and the protrusion 14G of the end detection gear 14 engages with the pin 10b of the end detection lever. The lever 10 moves upward, and the start trigger lever 73 rotates clockwise in FIG. The tape transport direction is switched by exactly the same operation as the switching operation of the transport direction.The 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, [F 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,
Press 13 to move it backwards. Then, the switch 1 to switch 1 is activated via lever J142.
43 is on. Further, the longitudinal bin 121 protruding from the left end of the head stand 47 is pushed to the left by the tapered portion 113a of the longitudinal operation lever 113, thereby moving the head stand 47 to the left by a predetermined amount, and the magnetic head 49, the contact state of the magnetic tape is loosened. As is clear from FIG. 25, the backward movement of the longitudinal operating lever 113 causes the lever 1126 that engages with the protrusion 113C of the longitudinal operating lever to swing in the counterclockwise direction as shown in FIG. Therefore, the lever 1129 similarly swings in the direction of the hour mark in FIG.
It rotates counterclockwise in FIG. 26 about 30a. Therefore, the first gear 132 of the gear transmission mechanism 135 provided on the swing lever 2 is connected to the rear flywheel 2.
Further, the final stage gear 134 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 longitudinal operating lever 114 for REW operation. That is,
The protrusion 114C of the longitudinal operation lever 114 is connected to the lever 112.
6, and the lever 1 is engaged with the second end 126b of the 25th lever.
The first stage gear 13 is rotated clockwise in the figure.
2 and the final stage gear 134 are respectively the front flywheel 2
7 and the reel 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. When ejecting the cassette half after tape reproduction is finished, the longitudinal operating lever 113 for the F operation and the longitudinal operating lever 114 for the REW operation may be pressed at the same time. Part 2
By simultaneously pressing the long operating levers of the book, the intermediate lever 138 (for example, shown in FIG. ). Therefore, in the completely opposite operation when loading the clips 1-half 155, the clips 1-half are projected to be retrieved by the listener. In addition, for example, the switch 150 shown in FIG. 24 also operates, so the electromagnetic solenoid 86 (see FIG. 23) becomes in the Δ state, and the coil spring 82
The lever E83 returns to the state shown in Fig. 17 by the action of
It will be done. Therefore, the pin 83c provided on the lever F83 engages with the protrusion 39g formed on the right end of the control plate 39.
Becomes No.1. As a result, the return of the flil nn plate 39 to the most backward movement position (rightward movement limit position) is prohibited. That is, 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 does not rotate and the tape This prevents unnecessary switching of the transport direction. As mentioned above, the above-mentioned OFF operation of the electromagnetic solenoid 86 is also performed when the 4-1 of the automobile in which the cassette deck is mounted is turned on. Effects of the Invention As described in detail above, in the cassette deck according to the present invention, the first gear ( a second gear (33) for rotating a magnetic head (49) rotatably provided around an axis substantially parallel to the moving direction of the head stand;
4), and the first gear and the second gear are configured to receive a rotational force from a rotational force applying means including a single drive source (motor 24). Therefore, two or more driving sources perform the reciprocating motion to place the magnetic head on the magnetic tape and the rotating motion of the magnetic head to match the forward and reverse running of the magnetic tape. This makes it easier to reduce the size and cost of the cassette deck as a whole compared to a deck.Furthermore, in the cassette deck according to the present invention, the rotational force applying means is connected to the first gear and the second gear. a gear transmission mechanism that meshes with the gear transmission mechanism, and a trigger means is provided to prevent the second gear from meshing with the gear transmission mechanism after the first gear meshes with the gear transmission mechanism. The cassette deck according to the present invention does not cause damage to the magnetic tape or generate noise because the magnetic head rotates only after the magnetic head moves and is completely separated from the magnetic tape. , above, when the first gear rotates 360 degrees, the head stand performs forward and backward movements, and the second gear rotates 180 degrees.
By rotating the magnetic head by 180 degrees, the magnetic head rotates by 180 degrees. Therefore, the 'MI' mutual timing of the reciprocating motion and rotational motion of the magnetic head can be ensured and optimized. Further, in the cassette deck 1 according to the present invention, the rotation ratio of the first gear and the second gear is 1:1. By making the rotation ratio of both gears equal in this way,
The timing of the reciprocating motion and rotational motion of the magnetic head can be set extremely easily.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a cullet deck according to the present invention, Fig. 2 is an exploded perspective view of the internal structure of the cullet deck, Figs. 3 to 8 are partial detailed perspective views of the internal structure, and Figs. 9 and 10. The figures are a plan view and a rear view of the internal structure, FIGS. 11 to 18 are diagrams showing details of the internal structure, and FIGS. 19 to 26 are diagrams for explaining the operation of the cassette deck. be. Explanation of symbols of main parts 1...Cassette deck 2...Housing 2a...Opening 3...
- Chassis 3a, 3f...Bending portions 3c, 5m, 56a, 95a, 126d. 140...Elongated hole 3d...Support protrusion 5...Reel unit 5a...Rotation shaft 5b...
Reel 66-5C...Color 5d...Bush 1
5e... Expanded diameter part 5f... Double gear 50.511.30b, 35, 4.0. =11°6
0, 70. 76, 82. 84. 103°10
4, 118. 119. 125. 139...
...Coil spring 5h ...Felt plate 51 ...Arm 54.5k ...Washer 7 ...Intermediate lever 7a, 8a, 8b, 10b, 30d, 33a. 39e,,j4a, 77b, 83c, 86b. 91a, 100a, 129b, 130a. 138a, 13Bd---Bin 7b, 64a...Opening 7c, 56c...Notch 8...Idle lever 10...End detection Levers 10a, 14c, 3'3f, 39a, 39b. 39c, 4.2a, 47a, 49a, 56e. 81a, 99G, 998.113G. 114C...Protrusion 11...Sub-chassis A 12...Lever A 14...End detection gears 14a, 39h, 47b, 100b. 140a...Protrusion 14b...Protrusion 16.17.18.19, 61.13'2°133.1
34...Gear 20.135...Gear transmission mechanism 22...
・Worm 23...Pulley 24...
・Motor 24a...Small pulley 25...
... Belt 27 ... Flywheel 2
7a, 27b... Gear part 28... Idler gear 30... Support lever 30a... Capstan 33. Old.
・First gear 33b...Partial tooth portions 33c, 33d, 34c, 34d...---Toothless portion 3
4... Second gears 34a, 34b... Stop bin 36.124
...Plate 39...Control board 39d...
Regulation part 390... Convex part 42...
...Lever B44...Lever C47...
Head stand 49... Magnetic heads 51a, 123... Claw members 51b, 99d... Spring member 52... Lower moving play 52a, 52b... ... Claw portion 53 ... Lever D 54.66 ... Spring 56 ... Slide member 56d, 113a, 114a --- Taper portion 57.
... Bearing member 59 ... Fan-shaped gear 64 ... Regulation member 65 ... Screw 69 ... Prohibition lever 69a ... Engagement recess 69b...Engagement protrusion 73...Start 1~Register lever 73a...
. . . One end portion 73b, 83b, 126b, 129c . . . Second @ portion 75 . . . Magnetic head switching command Ron door 7.86
......Electromagnetic solenoids 77a, 86a...
・Movable rod 79... Operation switch group 81.
...Movement member 83...Lever E 83a, 126a, 129a...Eye...First end portion 89.
138b... Support shaft 90... Pinch roller 91... Arm member 95... Sub chassis B 96... Rocking member 96a...・・・・・・
Left end portion 98...Cassette holder 98a...
... Swing shaft 99 ... Top member 10
0.Old...Right side member 101...Moving member
102... Lever F106... Reel hole 107... Concavity 111...
・Subchassis C 113, 114...Longitudinal operation lever 115.1
16...Operation button 121...Longitudinal bottle 124a...Top protrusion 126...
...Lever H129...Lever ■130...
... Swinging lever 138 ... Intermediate lever 14
．． Ob...Rear right edge 142...Levy J 143...Mikoto 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 second gear is provided so as to be reciprocally movable between the first gear position and the most backward position, is caused to move forward by the rotation of the first gear, and engages with the second gear when the first gear is not in the most backward position. a control plate formed with a regulating portion for regulating the rotation of the control plate; and 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 when the control plate reaches the forwardmost position, and to release the prohibition by the initial movement of the first gear; and the first and second teeth. and a biasing means for biasing the width in a direction to mesh with the gear transmission mechanism, and when the first gear rotates 360 degrees, the head stand performs forward and backward movements, and The magnetic head is rotated by 180 degrees when the two gears rotate by 180 degrees, and the first and second gears rotate by 180 degrees.
A cassette deck characterized by a gear rotation ratio of 1:1.