JPS6182313A - Cassette deck - Google Patents

Abstract

PURPOSE:To move a lever, a moving plate, etc. stably by arranging a gear which rotates a magnetic head in the position more distant from a head base than a gear which moves the head base back and forth. CONSTITUTION:A head driving mechanism which drives a head base 47 is constituted with a gear 33, a control plate 39, etc. A gear 34 rotates a magnetic head 49 provided on the head base 47 and is arranged in the position more distant from the head base 47 than the gear 33. For the purpose of converting rotation of the gear 34 to rotation of the head 49, rotation of the gear 34 is converted to reciprocating of a moving plate 52, and this reciprocating is transmitted to the head 49 through a lever 53, etc. Dimensions of prescribed members such as the lever 53, the plate 52, etc. are determined by the set position of the gear 34. By this constitution, the gear 34 is set at a great distance form the head base 47 to move prescribed members stably without wrenching.

Description

[Detailed description of the invention] Technical field The present invention relates to a cassette deck.

BACKGROUND ART In recent years, cassette decks have tended to become more and more compact.In particular, there is a strong demand for smaller cassette decks, as there is a limit to the space in which the cassette decks can be accommodated.

Furthermore, when playing back a 4-track magnetic tape that has been recorded in both forward and reverse directions, the cassette half is usually reversed and replaced when playback in one direction is completed, but this replacement is troublesome. A cassette deck with a built-in so-called auto-reverse mechanism has been developed to solve this problem. As is well known,
The auto-reverse mechanism automatically reverses the magnetic tape 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. For example, when playing back a four-track magnetic tape, a four-channel magnetic head is provided and two of the four channels are switched between the forward and reverse directions of the magnetic tape. There is a type in which the tape is electrically switched according to the 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 that avoids rotation is adopted.

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 after the magnetic head rotates, the magnetic head is made to move backward to move the magnetic head toward the magnetic tape. Abutting is performed.

The previously developed force is a drive source for rotating the magnetic head, and a drive source that is provided separately from the drive source to cause the magnetic head to reciprocate in a direction substantially perpendicular to the tape transport direction. At least two drive sources are provided, one for the cassette deck, and the other for the cassette deck. Therefore, this poses a problem in reducing the size and cost of the entire cassette deck.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned 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 cassette holder into which a cassette half is inserted after being fixed in its longitudinal direction, and a head that is capable of reciprocating in a direction substantially perpendicular to the tape transport direction of the cassette half held in the cassette holder. a stand; a magnetic head provided on the head stand so as to be rotatable between two angular positions about an axis substantially parallel to the moving direction of the head stand; and a tape corresponding to the angular position of the magnetic head; A cassette deck comprising a tape transport direction switching means that determines a tape transport direction, and a control mechanism that reciprocates the head stand and rotates the magnetic head,
The control mechanism includes a head stand drive mechanism that is disposed near the deepest part of the force cellar 1 to the holder and includes a first gear that rotates to reciprocate the head stand, and a second gear that rotates the magnetic head by rotation. and a rotational force applying mechanism that includes 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, The second gear is located at a position farther from the head stand than the first gear.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a cassette deck as an embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates the entire cassette deck.

As shown in FIG. 1, the front face of the housing 2 is provided with a rectangular and laterally elongated opening 2a into which a cassette half (described later) is inserted. However, the term "forward" as used herein refers to the direction indicated by the arrow Y in the figure, and the left-right direction refers to the direction toward the front. Therefore, the direction of arrow X is to the left, and the direction of arrow 7 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-rear direction on the chassis 3, and are rotatably attached to 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 into the upper and lower ends of the reel 5b, respectively. The collar 50 is fitted into the reel that is housed in the cassette 7 and around which the magnetic tape is wound. A disk-shaped enlarged diameter portion 5e is formed in the center of the reel 5b, and there are two large and small diameter portions between the enlarged diameter portion and the bush 5d.
A double gear 5f having two gear portions is disposed, and is rotatably attached to the rotation support shaft 5a.

A coil spring 5g is interposed between the double gear 5 and the bush 5d, which acts in a direction to separate the double gear and the bush from each other. Also, between the enlarged diameter portion 5e of the reel 5b and the double gear 5f. to Fell 1 to Board 5
l+ is provided. Fell 1 to plate 5h are enlarged diameter portions 5e
It is affixed to the double gear 5f and is slidably in 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 51). The lower and upper surfaces of the arm 51 are slidably engaged with the enlarged diameter portion 5e and collar 50 of the reel 5b via the washer t5j, 5k, and there is a gap between the left washer 51 (and the arm 51). A coil spring 5p is arranged 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. It is attached to the chassis 3 so as to be rotatable in a plane parallel to the main surface of the chassis. A rectangular opening 7b is formed at the front end of the intermediate lever 7, and a bin 8a protruding from the center of a floating lever 8 movably provided on the chassis 3 is inserted into the opening. It is loosely fitted.

The floating lever 8 has a bottle 8b protruding from both ends thereof, and each bottle is slidably engaged in a long hole 5m formed at the free end of the arm 51 of the reel units 1 to 5. are doing. 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. This end detection lever 10 is a rotatable end of a lever A12 that is rotatably provided on a nub chassis Δ11 that is fixed and protrudes upward on the upper surface of the rear end of the chassis 3, in this case, the right end of the lever A. is pivotally mounted 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 bin 10b is provided protruding from the rear surface of the upper end of the end detection lever 10, and the bin is rotatably attached to the subchassis A. 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 four part 14a is formed on the surface of the end detection gear 14 facing the end detection lever 10, and a four part 14a is formed on the circumferential surface of the concave part, and a part protrudes in the radial direction of the end detection lever. Three substantially mountain-shaped protrusions 141) having the same shape are provided at a pitch of 120°. Moreover, three protrusions 14c having the same shape and extending radially in the direction lJ are formed in the center of the four parts 14a in the valleys between the mountain-like protrusions 14b. A circle circumscribing the top of each protrusion 14b and each protrusion 1
If we imagine a circle placed at the top of 4C, the diameters of these fields are approximately the same size. The bottle 10b protruding from the end detection lever 10 has these protrusions 14b and protrusions 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 are four gears 16.1'7. that mesh in series.
A gear transmission mechanism 20 consisting of gear transmission mechanisms 18 and 19 is provided, and the end detection gear 14 meshes with the 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. 18) is connected to an A-mu 22 rotatably attached to the subchassis All. They mesh together. A pulley 23 is integrally formed at the lower end of the worm 22. 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. 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 5 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 the support lever 30, which is swingably mounted on the chassis 3 via the shaft member 30a. It can be freely accessed and detached from the double gear 5f of the reel unit 5 by swinging the support lever. 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 5f.

As shown in FIGS. 2, 7, 9, and 18, a first gear 33 and a second gear 34 are rotatably attached to the rear surface of the subchassis A11 above the gears 16 to 19. It is being The first gear 33 is the gear transmission mechanism 2
0 (for example, see FIG. 7), and 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 for rotationally driving the first intermediate tooth 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 urges the first gear 33 in the hour direction 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 steel plate is attached to the front surface of the bent portion 3a so as to be movable in the left-right direction. control board 39
The movement limit position in the left direction is called the most forward movement position of the control plate, whereas the movement limit position in the right direction is called the most backward movement position. A coil spring 4 is provided at the right end of the control plate 39 to urge the control plate to the right, that is, in the backward movement direction.
0 is concatenated. A protrusion 39a with which the bin 33a of the first TA wheel 33 can be engaged is formed at the upper end of the control plate 39, which is approximately in the center thereof. The projection 39a engages with the bin 33a at its right edge, and therefore the control plate 3
9 is moved forward by the rotation of the first gear 33. As shown in FIGS. 2, 4, and 10, below the three control plates are the control plates and the coil springs 4.
A lever B42 is disposed which is connected to the lever B42 via the control plate 1 and moves to the left as the control plate moves forward. A protrusion 42a is formed at the right end of the lever 842 and engages with the right edge of the protrusion 39b formed at the lower end of the control plate 39. This allows the control plate 39 to be moved by the biasing nozzle j of the coil spring 40. Along with the backward movement, the lever B42 also returns to the right. As is clear from FIG. 2, FIG. 8, and FIG. Rotatably mounted on chassis 3 f = J L:
It is pivotally attached to the rear end of the lever C44. The front end of the lever C44 is pivotally attached to a head stand 47 provided on the chassis 3 so as to be able to reciprocate in the left-right direction. 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 first gear 33, the control plate 39, the coil spring 40.41, the lever B-12, the lever C44, and the peripheral small portion l related thereto make the head stand 4
A head stand driving mechanism for driving the head 7 is configured.

Next, the second gear 34 and its related members will be explained. The second gear 34 is for rotating the magnetic head 49 provided on the head stand 47, and is disposed at a position farther from the head stand 47 than the first gear 33. Moreover, 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 also protrudes from the front face of the second gear. penetrates through. In addition, both stop bins 3
4a and 34b can be engaged 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 3
9 can be moved forward even if it is attached to both the switch pins.

Further, a claw member 51a and a spring member 51b are provided near the second gear 34, and the second gear 311 is biased clockwise in FIG. 18 by the claw member and the 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 able to reciprocate in the left-right direction. 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 bin 34a at its right edge, and the claw portion 52b engages with the stop bin 34a at its left edge. That is, the moving play 1 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 each of the movable plays 1 to 52, and the lever D53 has a central bent portion. It is rotatably attached to the first side of the chassis 3 at . Further, the lever D53 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. Further, the front end of the lever D53 is pivotally connected to the rear end of a slide member 56 (also shown in FIG. 5) provided on the head stand 470 so as to be able to reciprocate in the front-rear direction. There is.

As shown in FIGS. 2, 5, and 9, the magnetic head 49 is placed to the right of the slide member 56. As shown in FIGS. The magnetic head 49 has a bearing member 5 fixed on the head stand 47.
7, it is rotatably supported around an axis parallel to the moving direction of the head stand 47, that is, around an axis perpendicular to the magnetic tape contact surface of the magnetic head. The rotating shaft portion of the magnetic head 49 is made of an alloy of die-casting 1, whereas 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 5, 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. 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 arranged 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 in 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 fitted.
is provided extending in the front-back direction. Note that the fan-shaped gear 59 is click-energized 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 five fan-shaped gears are configured to swing 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 described above, the moving plays 1 to 52, the lever D53, etc., the spring 54, and the slide member 56,
Bearing member 57, fan-shaped gear 59, and coil spring 6
0, the gear 61, and peripheral small members related thereto constitute a head rotation mechanism for rotationally driving the magnetic head 49. Further, the head rotation mechanism and the bed platform drive mechanism described above are collectively referred to as a control mechanism.

That is, the control mechanism causes the head stand 47 to reciprocate and the magnetic head 49 to rotate. 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 four magnetic heads 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 is fixed to the head stand 47 at its center portion, and both front and rear ends extending in directions away from each other around the center portion serve as the magnetic head 49. It can be engaged with the outer periphery of. More specifically, both the front and rear ends of the regulating member 6/I are positioned so as to sandwich the magnetic head 49 from the front and back, and one of the two ends is bent in a U-shape, and the bottom side of the ]-shape is bent. A protrusion 49 that protrudes from the outer periphery of the magnetic head 49
By engaging with a, rotation of the magnetic head 49 is restricted.

Note that a protrusion 49a of the magnetic head is formed on the lower surface of the regulating member 64 when the magnetic head 49 rotates.
An opening 64a is provided to prevent contact. 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 640 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 angular circumference of the magnetic head 49 can be adjusted individually to 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 forming the above-mentioned regulating member into a single member having a front-back symmetrical shape, the number of parts is reduced and the number of assembly steps is also reduced, contributing to cost reduction.

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 a stationary state before its operation, the missing tooth portion 330 corresponds to the gear 16 (a part of the gear transmission mechanism 20), and the partial tooth portion 33b corresponds to the gear 16 (part of the gear transmission mechanism 20). 16 is prohibited. On the other hand, the second gear 34 also has two toothless portions 34C and 34d formed with a pitch of 180°, and when the second tooth width is in a stationary state during operation, the toothless portion 34c is connected to the gear 1B ( Teeth! 1) Part of the 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, when the first VA wheel 33 and the second gear 34 rotate, after the first gear 33 meshes with the gear 16, the second gear 34 does not mesh with the gear 18. explain.

It is clear from FIG. 4 that the rear end of the control plate 39 has stop bins 34a and 34b of the second gear 34 when the control plate is not at the most backward movement position (rightward movement limit position). A regulating portion 39 (1) is formed that engages to regulate rotation of the second gear.

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 movably attached 1).

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 connected to a coil spring 70.
As shown in FIG. 17, it is biased clockwise. 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, it is especially clear from Figure 7 that J: Sea urchin, 1iii
A protrusion 33 is formed on the outer periphery of the l wheel 33 and is engageable with an engagement protrusion 69b formed on the prohibition lever 69.

That is, when the first gear 33 initially moves, the protrusion 33f of the first gear 33
is engaged with the engagement protrusion 691), and the prohibition lever 69 is moved to the 17th
As shown in the figure, the control plate 39 is swung in the counterclockwise direction, and the backward movement prohibition state of the control plate 39 in the forward movement position is released.

The above-mentioned prohibition means (consisting of the prohibition lever 69, etc.), the control plate 39, and the control plate which is biased in the backward movement direction (rightward)
The coil spring 10 and the partial tooth portion 3311 of the first gear 33 are connected to the gear 16 (gear transmission mechanism 20
a coil spring 35 as a biasing means for biasing the 11th wheel in the direction of meshing with the second gear 3;
A small member 51a and a spring member 51a as urging means for urging the second gear in a direction in which the toothed portion of No. 4 meshes with the gear 18 (a part of the gear transmission mechanism 20), and the surrounding small members related thereto. These members constitute a trigger means that causes 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 start rotating.

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. has been dismissed.

As is clear from FIGS. 7 and 18, one end 73aI of the start trigger lever 73 is bent rearward at a right angle in the direction C, and the bent portion can be engaged with the first gear 33. It has become. More specifically, the pin 33a protruding from the rear surface of the first gear 33 passes through the first gear and
It also protrudes from the front of the gear by a predetermined amount = 25-, and one end 73a of the start trigger lever 73 engages with this protruding portion from the front, thereby preventing the rotation of the first gear 33. It is regulated. 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 AI2, and as the end detection lever 10 moves upward, the start trigger lever The start trigger lever 73 is rotated in the direction of time 3 in Fig. 18, and the rotation restriction state of the first gear 33 is released. It has three ends 73c, and the third end is connected to the magnetic head switching command rod 75 shown in FIG.
is engaged with the left end of 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 wire 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 73 is rotated clockwise as shown in FIG. 18. Also, as shown in FIG. 10, the head switching command rod 7
The third end 73 of the start trigger lever 73 is located near the fifth position.
A coil spring 6 is disposed to provide a rightward bias (J) at c. As shown in FIGS. 2, 3, and 17, an electromagnetic solenoid 77 is located near the motor 24. The movable long door 7a of the electromagnetic solenoid 77 extends to the left and right, and is fixed on the chassis 3.The movable long door 7a of the electromagnetic solenoid 77 protrudes to the right from the solenoid body. A bottle 77b extending in the vertical direction is fitted into the holder. The lower end of this bin 77b is
A magnetic head switching command rod 75 is loosely fitted into a long hole 3C extending in the left-right direction on the main surface of the chassis 3.
is engaged with the right end of the That is, by pulling the movable rod 77a of the electromagnetic solenoid 77, the magnetic head switching command rod 75 is moved to the left (therefore, the start trigger lever 73 is rotated clockwise in FIG. 18). It is. 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. 77
This is a command switch for activating the

As shown in FIGS. 2, 4, 10, and 17, the front surface of the rear bent portion 3a of the chassis 3 to which the control plate 39 is attached is located in the same direction as the control plate, that is, in the left-right direction. A movable member 81 is movably attached at.

This moving member 81 is arranged at 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. A coil spring 82 is connected to the right end of the movable member 81 for imparting a rightward bias to the movable member.

As is particularly clear from FIG. 3, a T-shaped lever [83] is disposed on the right side of the moving member 81.
They are rotatably attached to the rear end bent portion 3a of the chassis 3 at approximately the center thereof. A first end R11183a formed on the lever E83 and extending downward is connected to the rear end of the moving member 81 via a coil spring 84. In other words, when the moving member 81 moves to the left, the lever E83 rotates in the direction of the hour mark in FIG. 17. A bottle 83C extending forward is protruded from the tip of the second end 83b formed on the lever E83 and extending leftward, and the bottle is connected to a convex portion 390 formed at the rear end of the control plate 39. and four parts 3-9h, respectively.

When the bottle 83c is engaged with the recess 39h, the control plate 39 is at the most backward movement position (rightward movement limit position) of the control I root.
The bottle 83C can be moved up to the convex portion 39(]
When engaged, 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 restriction portion 39 formed on the control plate
d is the stop bin 34a, 34.d of the second gear 34; b, and the rotation of the second gear is restricted.

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, and
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 83c of the lever E83 engages with the protrusion 39g at the rear end 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 activated by operating the key of the automobile in which the cassette deck is mounted, and when the key is in the on state, the movable rod 8 of the electromagnetic solenoid 86
6a is pulled in as the movable member 81 moves to the left and fixed at the -C retracted position, so that the pin 830 of the lever E83 engages with the rear end recess 39h of the control plate 39. ing. Furthermore, when the key is in the A position, the movable rod 86a is pulled out by the biasing force of the coil spring 82 that pushes the movable member 81 to the right. 39 is engaged with the rear end portion al139o.

The above-mentioned moving member 81, coil spring 82, lever E83, coil spring 84, etc., electromagnetic solenoid 86, and surrounding small members related to these allow the control plate 39 to be moved back to its fullest position when the power is turned off. A prohibition/cancellation means is configured that prohibits return to the position (rightward movement limit position) and cancels 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 a capstan. Note that, as shown in FIG. 10, this shaft member 30a also serves as a pivot shaft for the rotation of the flywheel 27. On the other hand, as is particularly clear from FIGS. 3 and 5, a pair of support shafts 89 extending upwardly protrude from the chassis 3 near the capstan 30a. A pinch roller 90 is rotatably attached to the free end thereof, and an arm member 91 is rotatably attached thereto.

The pair of pinch rollers 90 are each detachable from the capstan 30a. A bottle C11a that vertically passes through the arm member 91 is fixed to the free end of the arm member 91, and a spring for adjusting the azimuth of the magnetic head 49 to <T tJ is attached to the lower end of the left edge of the bottle. 6
6 (for example, see FIG. 5) is engaged. The arm member 91 is biased by the spring 66 in a direction in which the pinch roller 90 approaches 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 560 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.
are provided, and one of the pins 91a of the arm member 91 is selectively engaged with 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 56C by this tapered portion 56d.

When the pin 91a engages with the notch 56C, the arm member 91 is rotated to the left by a predetermined amount, and the pinch roller 90 is separated from the gear 30a. . That is, the pair of pinch rollers 90 are selectively detached from the capstan 30a by the reciprocating movement of the slide member 56, which is a component of the head rotation mechanism described above.

As is particularly clear from FIG. 5, mountain-shaped protrusions 47a are formed at both left and right ends of the head stand 47 that supports the slide member 56 so that the pointed portions thereof face each other. Further, on the left side of the protrusion 47a, there is a four part 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.
0d, the support lever 30 swings in the direction in which the idler gear 2, which has been removed by the support lever, is separated from the double gear 5 of the reel unit 5, and the four parts following the protrusion 47a 471) is engaged with the bin 30d, the support lever 30 returns to the position where the idler gear 28 meshes with the double gear 5[.

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, the mechanism for loading the 1-half 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 rocking member 96 extending in the left-right direction is disposed on the chassis 3, and a support protrusion 3d provided at the rear left end of the chassis B95 and the support protrusion 3d at the rear end. It is attached so that it can swing freely.

A cassette holder 98 for holding a cassette half is attached to the free end, that is, the front end, of the swinging member A96 so as to be swingable at the center in the front-rear direction. In addition,
For example, the position of the cassette holder 98 shown in FIG. 5 is referred to as the -L raised position of the cullet holder. The cassette half is inserted into the cassette holder 98 in this position from the direction of arrow S and held in the cassette holder. Also, from this state, the swinging member 96 swings downward at a predetermined angle, and the cassette half held in the cassette holder 98 is positioned at the playing position. This is called the lowered position of the holder. The cullet holder 98 is movable between this lowered position and the above-mentioned raised position.

On the lower surface of the cassette holder 98, there is a movable member 101 consisting of two members, an upper surface member 99 and a right surface member 100, which can engage with n cassette halves.
It is numbered so that it can be moved freely in the exit direction, that is, in the front-back direction. 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 F1 is located at the center lower end of the leaf chassis 95.
02 is attached to its lower end so as to be swingable, and the upper end of the lever F is pivotally attached to the bin 100a. A coil spring 103 is connected to the lever F102, which urges the lever F clockwise in FIG. 13, thereby imparting a bias force to the moving member 101 in the cassette half ejection direction, that is, forward. Four parts 100b that recess downward are formed at the front end of the right face part 0100, and when the right face member 100 moves rearward when the cassette half is inserted, the swing support shaft 98a of the cassette holder 98 moves into this recess. 100b, and the cassette holder 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. Note that as the moving member 101 moves in the cassette half insertion direction (rearward), the cassette holder 98 is urged toward the lowered position by the coil spring 103.

As is clear from FIGS. 12 and 14, the moving member 10
The upper surface member 99 of 1 is provided with a protrusion 99c that faces the reel hole 106 of the cassette half to be inserted, and a spring member 99d that biases the cassette half so that the protrusion 990 projects into the reel hole 106. There is. Note that the protrusion 99C is formed integrally with the upper surface member 99 by stamping or the like. In this way, by integrally forming the protrusion 99c on the upper surface member 99, there is no need to attach special parts to the upper surface member 99 in order to provide the protrusion, and the number of parts and the number of man-hours for attachment are reduced. Efforts are being made to reduce costs.

The upper surface member 99 is also formed with another protrusion 99e 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 reducing costs for the same reason as above. Note that the protrusion 99e engages with a recess 107 called a label area formed in the first half of the case. In this way, by engaging the protrusion 99e with the four parts provided on the case 1 to half, the engagement state of the protrusion 99e to the case 1 and half becomes firm.

In the cassette deck, a cullet 7 is inserted into the cassette holder 98 along its longitudinal direction. In addition, the above-mentioned control structure, that is, the head stand 4
A control mechanism for rotating the magnetic head 49 by one reciprocating movement μ is arranged near the deepest part of the cullet holder 98.

Next, a mechanism for performing the FF operation (tape fast forwarding operation) and the RFW cutting operation (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 A subchassis C111 also shown in FIG. 15 is fixed. A pair of longitudinal operating levers 113 and 114, which extend in the longitudinal direction and are vertically stacked, are attached to the subchassis C111 so as to be able to reciprocate in the longitudinal direction. The front end portions, that is, the operating end portions of each of the longitudinal operating levers are spaced apart by a predetermined distance on the left and right, and each operating end portion has an operating button 115, . 116
(shown in the first diagram) is attached. The longitudinal operating lever 113 disposed at the bottom performs the "[operation] by its forward movement, that is, the backward movement, and the longitudinal operating lever 114 provided at the upper position performs the "[operation] by its forward movement. These longitudinal operation levers 11 are used to perform the REW operation.
3 and 114 are arranged above the magnetic head 49. Further, the cylinder longitudinal operation levers 113 and 114 are given a forward bias by coil springs 118 and 119, respectively. As is particularly clear from FIGS. 7 and 15, the upper end of the longitudinal bin 121 protruding from the left end of the upper surface of the head stand 47 is located on the left side of the rear end of the longitudinal operation levers 113 and 114. Tapered portions 113a and 114a are formed that can be engaged when moving to the right. That is, by pressing any of these longitudinal operation levers 113 and 114 while the head stand 47 is moving to the right, the head stand 47 is moved to the left by a predetermined amount, and thereby the magnetic head 49 is separated from the magnetic tape. Further, when the head stand 47 is thus moved to the left by a predetermined amount by operating the longitudinal operation lever, the protrusion Aha formed on the head stand 47 touches the bin 30d of the support lever 30 that holds the idler gear 28. As a result, the idler gear 28 is disengaged from the double gear 5 of the reel unit 5. The story goes back and forth, but for example, as shown in FIGS. 3 and 9, a pair of pawl members 123 are provided on the chassis 3 to prevent the reverse rotation of 5. It is being When the head stand 47 moves, the right side part 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, a plate 124 is located on the right side of the rear end of the bent portion 3f formed at the left end of the chassis 3 in the front-rear direction. It is movably mounted at fq. plate 124
A coil spring 125 is connected to the upper end protrusion 124a to provide a forward bias horn f1 to the plate. A T-shaped lever l-1126 is rotatably attached to the front end of the plate 124 at its center. Particularly, as is clear from FIG. 16, a protrusion 113C is provided on the front edge of the first end 126a formed on the lever 1126 and extending downward on the longitudinal operation lever 113. The trailing edges of the two are brought into contact. Further, on the front edge of the second end portion 126b formed on the lever H126 and extending upward, a protrusion 11 extending substantially leftward and protruding from the other longitudinal operation lever 114 is provided.
The trailing edge of 4C is abutted. That is, by pushing the longitudinal operating levers 113 and 114, respectively, the levers 1-1126 are rotated counterclockwise and clockwise as shown in FIG. 16, 4-J.

In front of the play 1-12 /I, there is a lever 1129 formed in a substantially dogleg shape, and one lever 1129 is rotatably attached to the curved portion 3r in the lt direction of the chassis 3 at its central bent portion. ] GJ is being done. A bottle 12 is attached to the tip of a first end 129a formed on the lever 1129 and extending rearward.
9b is provided protrudingly, and this bottle 129b is connected to the lever 1.
- a third end 12 formed at 1126 and extending forward;
It is slidably fitted into a long hole 126d formed in 6G. Further, the second pant portion 129G of the lever 129 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 a pair of reel units 1 to 5 and a flywheel 27, respectively. The bottle 130a is located approximately in the center of the bottle 130a.
It is swingably attached to the chassis 3 via.

The left end of the swinging lever 130 is pivotally attached to the tip of the second end 129C of the lever 129. Further, a gear transmission mechanism 13 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.
5 is provided. The gear 132, which is the first gear of the gear transmission mechanism, is connected to each gear portion 27 of the pair of flywheels 27.
The final stage gear 134 is designed to be able to mesh with a small diameter gear portion formed in the double gear 5f of the reel unit 5. Da na strawa. When the longitudinal operation levers 113 and 114 are pressed, the swinging lever 130 swings backward and forward via the lever +1126, thereby causing the reel units 5 disposed at the rear and front to move in the respective alternative directions. It can be rotated at high speed.

As shown in FIG. 2, FIG. 7, FIG. 15, and FIG. An intermediate lever 138 is stepped which can reciprocate in the direction of movement (back and forth direction) of both branch hand operating levers. A coil spring 139 is connected to the intermediate lever 138 for applying a forward tension 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. Long hole 14 formed to extend in the front-rear direction at 114
0 in a slidable manner. A recess 140a into which a bottle 138a can be inserted is formed at the right end of the central portion of the elongated hole 140. Here, the intermediate lever 138 can swing by a predetermined angle about a support shaft 138b at its front end. Further, a coil spring 139 that urges 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 centered around the support shaft 138b. First
It is also biased in the counterclockwise t1 direction in FIG. That is, when both branch hand control levers 113 and 114 are moved forward (move backward) at the same time, the pin 138a of the intermediate lever 138 fits into the recess 140a of the elongated hole 140, and thereby the intermediate lever 138 is moved rearward. It is configured to move. However, a pair of longitudinal operation levers 11
If only one of the cages 3,114 is moved forward, the elongated hole 140 formed in the other longitudinal operating lever
Since the rear right edge 140b of the intermediate lever 138 is still in contact with the bin 138a, the intermediate lever 138 does not move forward (move backward).

Although not detailed, the longitudinal operation lever 1 for FF operation
A mechanism is provided for locking either one of the longitudinal operating levers 13 and 114 in the forward movement position when the longitudinal operating lever is moved forward. Further, the locking mechanism locks the longitudinal operating lever in the forward movement position when the other longitudinal operating lever is moved forward;
One of the longitudinal operation levers above is unlocked. Also, if either of the longitudinal operation levers 113 or 114 is pressed 4.
6, when the lever J142 provided at the rear of the two hand-operated levers is pulled (as shown in FIG. 15), it is swung in the h1 direction to operate the mute switch 143. There is.

For example, as is clear from FIGS. 2 and 7, a bin 138 d is provided protruding from the upper surface of the rear end of the intermediate lever 138, and the bin 138 d is attached to the left end of the swinging member 96 (for example, shown in FIG. 6). It can directly engage portion 96a.

This intermediate lever 138 pushes the swinging member 96 rearward by moving forward, and moves the cassette holder 98 from the above-mentioned lowered position to the raised position.

Next, various switches provided in addition to the above-mentioned mu 1 to switch 143 and their arrangement will be explained.

As is clear from FIGS. 2 and 6, a bracket 146 is attached to the right end surface of the nub chassis B95, and two switches 147,
8 is installed. The switch 147 is used to switch the power to the cassette deck and the tuner disposed near the cassette deck 1 to the deck. Further, the switch 148 is used to prevent the motor 24 from being activated. 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 It operates when the moving plays 1 to 52 attached to A are engaged.

In addition, the J: sea urchin and sea urchin bush chassis 11 shown in FIG.
A switch 150 for cutting off the power supply to the cassette deck is fixed on top of the cassette deck 1, and is activated when the intermediate lever 138 is moved backward.

The operations of the cabinet 1 to the deck constructed 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.
As shown in FIG. As shown in FIG. 20, the cassette half 155
8, the right side member 100 moves rearward, and as a result, the cullet holder 98 swings.
The shaft 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.

As the cassette deck 7 is inserted, the switches 147 and 148 shown in FIG.
starts rotating. As the motor 24 rotates, as shown in FIG. 10, the small pulley 24a rotates in the direction of arrow M, the pulley 23 rotates in the direction of arrow N, and the pair of front and rear flywheels rotate in the directions of arrows 0 and P, respectively. It will be done. Therefore, the pair of reel units 5 start rotating in the directions of arrows Q and R (as shown in the 10th figure) through the pair of idler gears 28, respectively. In this way, since the pair of reel units 5 rotate in opposite directions, the slack in the magnetic tape in the tape half 155 is wound up.

When the slack of the magnetic j-p is wound up and a predetermined tension is applied to the magnetic tape, all the members of the reel unit l-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 the group of fixed members via the felt plate 5h. 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 activated by the rotation of the motor 24.
It is rotated in the counterclockwise direction as shown in FIG. 18 through the tf420. 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 111-shaped protrusion 14b. Therefore, the bottle 10b of the end detection lever 10 comes to rest at the top position of the 111-shaped protrusion 14b, and as a result, the protrusion 14C of the end detection gear 14
b. Therefore, the end detection lever 10 moves upward, and the start l-hemlock lever 73 is rotated in the ff1h direction in FIG. 18 via the lever A12. Thus, the bottle 33 is attached to one end of the start trigger lever 73.
The first gear 33, whose rotation was restricted due to the engagement of the gear a, is now able to rotate, and the spring 3
It is rotated in the horizontal direction in FIG. 18 by the biasing force 5. Therefore, the partial tooth portion 331 of the first gear 33)
meshes with gear 16, and the first gear begins to rotate. 1st
The control plate 3 shown in FIG. 17 etc. by the rotation of the gear 33
9 is moved toward the 71st direction, so the head stand 47 is moved to the 22nd direction.
As shown in the figure, the magnetic head 49 moves to the right and comes into contact with the magnetic tape. The control plate 39 that has reached the maximum forward movement position (leftward movement limit position) is stopped in its backward 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 rotates clockwise as shown in FIG. 23, and the movable end 86a of the electromagnetic solenoid 86, which is already in the on state, is pushed in.

By this operation, the pin 83c of the lever E83 comes to engage with the four portions 39h formed at the right end of the control plate 39, and therefore the control plate 39 moves to the most backward movement position (rightward movement limit position). becomes possible. In addition, the above-mentioned prohibition lever 6
When the three pins 39e of the control plate enter the engagement recesses 69a of the control plate 9, the prohibition lever 69 rotates by a predetermined amount in the horizontal direction as shown in FIG. The Micoat switch 143, which had been kept in the on state via the switch (see figure), 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 5 of the front reel unit 1-5, and only the rear reel units i to 5 are rotated. It will be. Note that this operation is performed by the protrusion 47 formed on the head stand 47.
This depends on the interaction between the concave portion 47b and the protrusion 56e provided on the slide member 56, but since it was described in detail in the previous explanation of the configuration, it will not be described 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. Remains 1Ilff removed from stun. This is because the pin 91a protruding from the arm member 91 that supports the front pinch roller 90 is fitted into the notch 56C of the slide member 56. Also the 22nd
As shown in the figure, due to the rightward movement of the head stand 47, the pair of claw members 123 that had been engaged with the guide unit 5 are removed.
is removed from the reel unit.

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 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 star trigger lever is activated via the magnetic head switching command rod 75.
73 rotates clockwise in FIG. J to this
:The first gear 33, whose rotation was restricted by the star 1 trigger lever, becomes rotatable, and is rotated clockwise in FIG. 18 by the biasing force of the coil spring 35. Therefore, the partial tooth portion 33b of the 111fi wheel 33 meshes with the gear 16, and the first gear begins to rotate. Immediately after the first gear 33 starts rotating, the protrusion 33 f protruding from the first gear engages with the engagement protrusion 691 of the prohibition lever 69 (see FIG. 17), and the prohibition lever is rotated as shown in FIG. 17. Rotate it in the opposite direction. Then, the engaging state of the engagement recess 69a of the prohibition lever and the pin 390 of the control plate 39 are released, and the control plate 39 is instantly moved to the maximum return position (rightward movement limit position) by the effort of the coil spring 40. By returning the control board 39 to the most backward movement position, the head stand 7I7 is
The magnetic head 49 is moved away 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.
Rotation of the second gear 34 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 to the 18th
The opening is turned clockwise in the figure. Therefore, the second
The toothed portion of gear 34 meshes with gear 18, and the second gear begins to rotate. As the second gear 34 rotates, the stop bin 34.8 protruding from the second gear moves the moving plate 5.
2, the moving plate is moved to the left, and the magnetic head 49 is connected to the moving plate 1.
is rotated 180° to the REV side. Further, by moving the moving plate 52 leftward, the switch 149 is switched from the FWD side to the REV side.

Due to the above rotation of the second gear 34, the stop pin 34a of the second gear 34a is stopped by a protrusion 39C (
(see FIG. 17, etc.), and the control plate is moved a predetermined distance to the left by the stop bin. When the second gear 34 completes 180° rotation, the stop bin 3/
Ia 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 3.
9, the control plate 39 is moved to the forward movement position (the leftward movement limit position) and is locked by the J: sea urchin prohibition lever 69 described above.

As the control plate 39 moves forward, the head stand 47 moves to the right again, and the magnetic head 49 comes into contact with the magnetic tape. Also,
The Micoat 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.
8 is attached to the reel unit 5, and only 5 starts rotating toward the front reel unit. Further, the front pinch roller 90 is brought into contact with the capstan 30a, and the rear pinch roller 90 is brought into contact with the capstan 30a.
It is held in a state of 11tlR.

In this way, the tape transport direction is switched from the FWD side to the REV side.In addition, regarding the operation of switching the tape transport direction from the REV side to the FWD side, the stop pin 34b of the second gear 34
This is substantially the same as the tape transport direction switching operation from the FWD side to the REV side, except that the moving plate 52 engages with the claw portion 52b (shown in FIG. 18) and moves the moving plate to the right. Not detailed.

Next, the operation of the mechanism that automatically switches the tape transport direction will be explained.

For example, when tape transport to the FWD side is completed, a predetermined tension is applied to the magnetic tape at the end, and all the components of the reel unit 5 shown in FIG. The shape is fixed by the reaction force of tension. Therefore, only the double gear 5f continues idling with respect to these fixed member groups to the felt 1 via the plate 5h. When the tape is being transported to the FWD side, the fixed member group is The arm member 51 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 in the counterclockwise h4 direction in FIG. 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 as shown in FIG. The installed bin 10b slides while contacting the mountain-like protrusion 14b of the end detection gear 14, and the protrusion 14c of the end detection gear does not engage with the bin 10b. When the members other than the double gear 5f come to a fixed state when the tape stops, the force urging the end detection lever 10 also disappears, and the protrusion 14c of the end detection gear 14 engages with the pin 101) of the end detection lever. , the end detection lever 10 moves in the -V direction, and the start trigger lever 73 rotates clockwise in Fig. 18 via the lever A12. The tape transport direction is switched by exactly the same operation as that for switching the tape transport direction from the RFV side to the FWD side.The automatic switching of the tape transport direction from the RFV side to the FWD side is performed in the same manner as the above operation, and details are given below. Not mentioned.

Next, FF operation (tape fast forward operation) and REW operation (
(Tape rewinding operation) can 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 mute switch 14 is activated via the lever J142.
3 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 and
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, which engages with the protrusion 1130 of the longitudinal operating lever, to swing counterclockwise in FIG. 25. Therefore, the lever 1129 also swings clockwise in FIG.
It rotates counterclockwise in FIG. 26 about a. Therefore, the gear transmission mechanism 1 provided on the swing lever
The first stage gear 132 of No. 35 meshes with the gear portion 27a of the rear flywheel 27, and the final stage gear 134 meshes with the small diameter gear portion of the double gear 5r of the rear reel unit 5. On the other hand, when the head stand 47 is moved in one direction by pushing the longitudinal operation lever 113, the pair of idler gears 28 are disengaged from the reel unit 5. Therefore, the rear reel unit 5 rotates at high speed, and the tape is rapidly forwarded.

When performing the RFW operation, this is done by pushing the longitudinal operating lever 114 for the REW operation. That is,
The protrusion 114C of the longitudinal operation lever 114 is the lever 1-11.
26, and the lever (-1) is rotated clockwise in FIG. Note that the leftward movement of the head stand 47 is caused by the tapered portion 114a of the longitudinal operation lever 114 being engaged with the longitudinal bin 1 provided on the head stand 47.
This is done by engaging 21.

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 longitudinal operating levers of the book, the intermediate lever 138 (for example, shown in FIG. ). Thus, by the exact opposite operation of loading the cullet half 155, the cassette half is projected to a position for retrieval by the listener. In addition, for example, since the switch 150 shown in FIG. 24 also operates, the electromagnetic solenoid 86 (the 23rd
(see figure) is turned off, and the lever E83 is returned to the state shown in FIG. 17 by the action of the coil spring 82. Therefore, the pin 83c provided on the lever [83] can engage with the protrusion 39o formed on the right end of the control plate 39. As a result, the return of the control plate 39 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 the second gear 34 does not rotate when the power is turned on again. This prevents unnecessary switching of the tape transport direction.

As mentioned above, the A-operation of the electromagnetic solenoid 86 is performed during automatic operation when the deck is mounted on the case 1.
This is also done when the state is set to O7.

Effects of the invention As detailed above, the power of the invention1? The deck includes a head stand drive mechanism including a first tooth width (33) for reciprocating a head stand (47) that is movable in a direction substantially perpendicular to the tape transport direction, and a head stand drive mechanism that includes a first tooth width (33) for reciprocating a head stand (47) that is movable in a direction substantially perpendicular to the tape transport direction; A second gear (34) for rotating a magnetic head (49) rotatably provided around a substantially parallel axis.
), and the first gear and the second gear have a rotational force f11 including a single drive source (motor 24).
Rotational force is applied to the f stage.

Therefore, compared to a cassette deck, which uses two or more drive sources 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, it requires less force. This makes it easier to reduce the size and cost of the whole deck.

Further, in the cassette deck according to the present invention, the cassette half is inserted into the current holder along its longitudinal direction, and the rotational force from the head stand drive mechanism, head rotation mechanism, and single drive FIJ source is used. a rotational force applying mechanism that applies rotational force to the first gear and the second gear is disposed near the deepest part of the cassette holder, and the second gear is disposed at a position farther from the head stand than the second gear. It is being

In order to convert the rotation of the second gear into the rotation of a magnetic head spaced apart from the second gear, first, the rotation of the second gear is converted into a rotation of a predetermined member (moving plate 5).
The optimal configuration is to convert the reciprocating motion in 2) into a reciprocating motion and transmit the reciprocating motion to the magnetic head via a link mechanism (lever D53, etc.). Since this predetermined member and the link mechanism constitute the head rotation mechanism, if the head rotation mechanism is arranged near the deepest part of the cassette holder as described above, the predetermined member (moving plate 52) will inevitably , along the lateral direction of the cassette half held in the cassette holder i! It is provided in the form of lI'l-.

Naturally, the link mechanism connects the magnetic head located corresponding to the head insertion hole of the case half and the tip of the predetermined member.

As is clear from the above, the size of the predetermined member is determined by the installation position of the second gear that engages with the predetermined member and rotates the magnetic head. Since the resistance force accompanying the movement of the predetermined member and the link mechanism is relatively large, the length of the predetermined member is determined by moving the position of the second gear closer to the head stand, and thus closer to the magnetic head. If it is made smaller, the movement of the predetermined member will become unstable,
I have to worry about moving 18 meters. In the cassette deck of the present invention, this problem is solved by making the 2nd m wheel far away from the head stand and greatly reducing the length of the predetermined member.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the entire 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. Figures 9 and 10 are respectively a plan view and a rear view of the internal structure, Figures 11 to 18 are views showing details of the internal structure, and Figures 19 to 26 are of the cassette deck. FIG. 3 is a diagram for explaining the operation. 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 5G...Color 5d...
Bush 5e... Expanded diameter part 5f...
Double gear 5o, 5!1.30b, 35. /I0.41
゜60.70,76,. 82.8=1,103°104
．． 118,119,125.139...Coil spring 5h...Felt plate 51...Arm 5j, 5k...Washer 7...Intermediate Levers 7a, 8a, 8b, 10b, 30d, 33a. 39e, 44a, 77b, 83c, 86b. 91a, 100a, 129b, T30a. 138a, 13Bd...Bin 7b, 64a...Opening 7G, 56G...Notch 8...Idle lever 10...End detection lever 10a, 14c, 33f, 39a, 39b. 39G, 42a, 47a, 4'9a, 56e. 81'a, 99c, 99e, 113c. 114C... Protrusion 11... Subchassis A 12... Lever A 14... End detection gears 14a, 39h, 47b, 100b. 140a...Protrusion 14b...Protrusion 16, 17. 18. 19. 61. 132゜1
33.134... Gear 20.135... Gear transmission mechanism 22...
・Worm 23...Pulley 24...
・Motor 24a...Small pulley 25...
... Belt 27 ... Flywheel 2
7a, 27b...Gear portion 28...Idler gear 30...Support lever 30a...Capstan 33...
...First gear 33b... Partial tooth portions 33c, 33d, 34c, 34cl... Missing tooth portion 34... Second gear 34a, 34b...・Stop bin 36.124
...Plate 39...Control board 39d...
Regulation part 39o... Convex part 42...
...Lever B44...Lever C47...
- Head stand 49... Magnetic heads 51a, 123... Claw members 51b, 99d... Spring member 52... Moving plates 52a, 52b... ...Claw part 53...Lever D 54.66...Spring 56...Slide member 56 (1,113a, 114B-=・y--Pa part 57・
...Bearing member 59 ... Fan-shaped gear 6
4...Regulation member 65...Screw 6
9...Prohibition lever 69a...Engagement recess 69b...Engagement protrusion 73...Star] Het trigger lever 73a...
...One end 73b, 83b, 126b, 129c ...Second end 75...Magnetic head switching command Rondore 7.86
......Electromagnetic solenoids 77a, 86a...
・Movable Ron door 9... Operation switch group 81.
...Moving member 83...Lever E 83a, 126a, 129a...First end 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... Right side member 101... Moving member
102... Lever F106...
Reel hole 107... recess 111...
...Subchassis C 113,114...Longitudinal operation lever 115.1
16...Operating button 127...Longitudinal bottle 124a...Top protrusion 126...
・・Lever H129・Old・・Lever 1130・・・・
・Swinging lever 138・Old・・Intermediate lever 140b・・
... Rear right edge 142 ... Levy J 143 ... Mute switch 146 ... Bracket

Claims (1)

[Claims] a cassette holder into which the cassette half is inserted along its longitudinal direction; a head stand capable of reciprocating in a direction substantially perpendicular to the tape transport direction of the cassette half held in the cassette holder; a magnetic head rotatably provided between two angular positions about an axis substantially parallel to the moving direction of the head stand; and a tape transport direction that determines a tape transport direction corresponding to the angular position of the magnetic head. A cassette deck including a switching means and a control mechanism for reciprocating the head stand and rotating the magnetic head, the control mechanism being disposed near the deepest part of the cassette holder and rotating the head stand. a head stand drive mechanism including a first gear for reciprocating;
a head rotation mechanism including a second gear that rotates the magnetic head by rotation; and a gear transmission mechanism capable of meshing with the first and second gears, the rotational force being applied to the first and second gears from a single drive source and a rotational force applying mechanism that applies
The cassette deck, wherein the second gear is located farther from the head stand than the first gear.