JPS6182356A - Cassette deck - Google Patents

Abstract

PURPOSE:To miniaturize the entire device by using a head rotation mechanism to detach an idler gear alternatively from a reel unit. CONSTITUTION:Large/small gears 27a, 27b are provided to the outer and inner circumferences of a flywheel 27, and the smaller gear 27b meshes with the large-sized gear of a double gear 5f of a reel unit 5 via a couple of front/rear idler gears 28. The idler gear 28 is fitted freely turnably to one shaking end of a support lever 30 provided freely shakingably via a shaft member 30 of a chassis 3 and attached and detached to/from a double gear 5f of the reel unit with the shaking of the support lever 30. Since the idler gear 28 is detached alternatively from the reel unit 5 by the head rotation mechanism to rotate the magnetic head 49, and the entire deck is miniaturized in comparison with a cassette deck where the mechanism rotating the magnetic head 49 and the mechanism attaching/detaching the idler gear 28 to/from the reel unit 5 are provided individually and the cost is reduced.

Description

[Detailed description of the invention] 1 glossy The present invention relates to a cassette deck.

111J (Cassette decks have been becoming increasingly smaller in recent years, and there is a strong demand for smaller cassette decks, especially for car-mounted 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 for switching the magnetic head forward and backward have already been proposed. For example, when playing a four-track magnetic tape, four channels of magnetic heads are provided and two of the four channels are switched between forward and reverse running of the magnetic tape. There is a type in which the tape is switched electrically, 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 azimuth adjustment can be performed independently for both forward and reverse running of the magnetic tape, and therefore better reproduction frequency characteristics can be obtained compared to other formats. Since then, a method has been adopted in which the magnetic head is prevented from rotating.

On the other hand, in order to make the magnetic tape run in reverse, a pair of reel units that are to be engaged with a cassette reel are each removably installed so as to transmit rotational driving force from a drive source to the reel units. A mechanism is often provided for selectively detaching the idler gear from the reel unit in response to rotation of the magnetic head.

The already developed cassette deck has a mechanism for rotating the magnetic head and 1. A mechanism for attaching and detaching the idler gear was separately provided. Therefore, this has become a problem in reducing the size and cost of the cassette deck as a whole.

Summary of the Invention The present invention has been made in view of the above-mentioned points.
The purpose is to provide a cassette deck that is easy to downsize as a whole and is inexpensive.

A cassette deck according to the present invention includes a magnetic head rotatably supported around an axis substantially perpendicular to a magnetic tape contact surface, a head rotation mechanism for rotating the magnetic head, and a pair of magnetic heads to be engaged with a cassette reel. an idler gear that is detachably provided to each reel unit and transmits rotational driving force from a drive source to the reel unit, and the idler gear is selectively rotated from the reel unit by the head rotation mechanism. The feature is that it can be removed from 11i.

BEST MODE FOR CARRYING OUT 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 surface of the housing 2 is provided with a rectangular and laterally elongated opening 28'h 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 arrow X direction is to the left, and the arrow Z direction is upward.

As shown in FIGS. 2 and 3, as well as FIGS. 9 and 10, inside the housing 2 is a chassis 3 made of a steel plate or the like.
is provided. As shown in FIG. 4, a pair of reel units 5 are arranged side by side in the front-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 rotational support shaft 5a. A collar 50 and a bush 5d are fitted to the upper and lower ends of the reel 5b, respectively.

The collar 50 can be fitted into a carrot reel which is housed in the cassette 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. Moreover, it is rotatably attached to the rotation support shaft 5a.

A coil spring 5a is interposed between the double gear 5f and the bush 5d to urge 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 5b and the double gear 5f. 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 50, 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 slidably 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 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 substantially 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.

Bins 8b are provided protruding from both ends of the floating lever 8, and each of the bottles is slidably engaged in a long hole 5m formed at the free end of the arm 51 of the reel unit 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. 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. End detection lever 10
A projection 10a extending downward is provided at the lower end of the intermediate lever 7, and the projection 10a is connected to a notch 7 formed at the rear end of the intermediate lever 7.
It is slidably engaged with C.

As shown in FIGS. 7, 9, and 18, a bin 10b is protruded from the rear surface of the lower 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 FIG. 7 and FIG. 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 120°. Further, three projections 14c having the same shape are formed in the center of the four parts 14,a, and extend radially toward the valleys between the above-mentioned mountain-like projections 14b. A circle circumscribing the top of each protrusion 14b and each protrusion 14
0, the diameter of each of these times is approximately the same size. The bottle 10b protruding from the end detection lever 10 is connected to these protrusions 14b.
and can be engaged with the protrusion 14C.

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 16.17.1 meshing in series.
A gear transmission mechanism 20 consisting of gears 8 and 19 is provided, and the end detection gear 14 is the final stage gear 1 of the gear transmission mechanism.
It meshes with 9. 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) meshes with a worm 22 rotatably attached to the subchassis A11. are doing. A pulley 23 is integrally formed at the lower end of the worm 22. As shown in FIG. 10, the pulley 23 is driven 101 revolutions by a motor 24 disposed at the right rear end of the chassis 3 via a belt 25. 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 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 is a support lever 3 that is swingably provided on the chassis 3 via a shaft portion U30a.
It is rotatably attached to one end of the reel unit 5, and is adapted to be placed against 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 2h, 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 a head stand, which will be described later. First, a structure for connecting the first gear and the head stand will be described.

For example, as shown in FIGS. 7 and 18, a pin 33a is protruded from the rear surface of the first gear 33, and the pin 33a urges the first gear 33 clockwise in FIG. One end of a coil spring 35 is hung. The other end of the coil spring 35 is hung on a plate 36 fixed to the tip of the rotation support shaft (not shown) of the gears 16 and 18.

As shown in FIG. 2, FIG. 3, FIG. 9, and FIG. 11, a bent portion 3 extends parallel to the sub-chassis A11 at the rear end of the chassis 3, that is, at the rear of the sub-chassis A11.
a 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. 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 40 is connected to the right end of the control plate 39 to bias the control plate to the right, that is, in the backward movement direction. A protrusion 39a with which the pin 33a of the first gear 33 can be engaged is formed at the upper end of the control plate 39 at approximately 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 84.2 is connected through the control plate 84.1 and moves to the left as the control plate moves forward. Lever B 4
A protrusion 39 formed at the lower end of the control plate 39 is located at the right end of the control plate 39.
A protrusion 42a is formed to engage with the right edge of the lever 842, so that the lever 842 also returns to the right as the control plate 39 doubles due to the biasing force of the coil spring 40. As is clear from FIGS. 2, 8, and 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 freely rotatable at its center via the bin 44a. It is pivotally connected to the rear end of a lever C44 attached to the chassis 3. This lever C4
The front end of the head 4 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 driving direction of the magnetic tape is the front-back direction, so
The moving direction of the head stand 47 is approximately perpendicular to the tape transport direction.

The above-described first gear 33, control plate 39, coil spring 40, 41, lever 842, lever C44,
The head stand 47 and the peripheral small members related to these
A head stand drive mechanism is configured to drive the head stand.

Next, the second gear 34 and its related 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. Further, the rotation ratio of the first gear 33 and the second gear 340 is 1:1.

As is clear from FIGS. 7 and 18, the second gear 34
Two stop bins 3/la and 34b are protruded from the rear surface with a pitch of 180°, and one stop bin 34a is attached to the second gear so that it also protrudes from the front face of the second gear. penetrates through. In addition, both stop bins 34a
, 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 plate 39 is also moved forward by both stop bins.

Further, a claw portion U31a and a spring member 51b are provided near the second gear 34, and the second gear 34 is urged clockwise (1'3) by the claw member and spring member. As shown in FIG. 18, a movable plate 52 made of a rope plate is attached to the rear surface of the subchassis A so as to be able to reciprocate in the left-right direction. Claw portions 52a and 52b are formed that can be engaged with the stop bin 34.a that protrudes from the front surface of the gear 34.The claw portion 5.2a engages with the stop bin 34a at its right edge, and also , the claw portion 52b is adapted to engage with the stop pin 34a at its left edge. That is, the moving plate 52 engages with 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 attached to the upper surface of the chassis 3. 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 47 so as to be able to reciprocate in the front-rear direction.

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 supported rotatably about an axis parallel to the moving direction of the head stand 47, that is, about 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 die-cast alloy, 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, 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.

An m-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 main valve of the fan. However, so that the joint between the fan-shaped gear 59 and the bearing member 57 does not hinder the reciprocating movement of the slide member 56,
The slide member 56 is provided with an elongated hole 56a extending in the front-rear direction and into which the coupling portion is loosely fitted. In addition, fan-shaped gear 5
9 is click-biased by a coil spring 60. A pin 59a is provided protruding from the right end surface of the fan-shaped gear 59, and the pin 59a is pivotally attached to the slide member 56.

That is, the fan-shaped gear 59 swings as the slide member 56 reciprocates. A gear portion of the fan-shaped gear 59 is meshed with a gear 61 coaxially fixed to the rotating shaft portion of the magnetic head 49.

The second gear 34, the moving plate 52, the lever D53, the spring 54, the slide member 56, the bearing member 57, the sector gear 59, and the coil spring 60.
A head rotation mechanism for rotationally driving the magnetic head 49 is constituted by the gear 61 and related small peripheral members. Further, the head rotation mechanism and the above-described head stand drive mechanism are collectively referred to as the control 1 mechanism.

That is, the control mechanism causes the head stand 47 to reciprocate and rotates the four magnetic heads. As understood from the above explanation, the first gear 33 rotates 360 degrees, causing the head stand 4 to rotate.
7 performs forward and backward movement, and the second gear 34
The magnetic head 49 rotates 180 degrees, causing the magnetic head 49 to rotate 180 degrees.
It is designed to rotate by 0°.

Here, the azimuth adjustment means for regulating the angle of the magnetic head 49 will be explained.

For example, as shown in FIGS. 5 and 9, the head stand 4
A regulating member 64 extending in the front-rear direction is fixed on the magnetic head 7 so as to surround the magnetic head /1.9.

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, the rear circular end portion of the regulating member 6/I is positioned so as to sandwich the magnetic head 49 from the front and back, and both end portions are bent in a U-shape. A protrusion 49 whose lower side protrudes from the outer periphery of the magnetic head 49
By engaging with a, rotation of the four magnetic heads is restricted.

Note that an opening 64a is provided on the upper surface of the regulating member 64 so that the projections 49a of the four magnetic heads do not come into contact with the regulating member 64 when the four magnetic heads rotate. 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 front and rear ends of the carbon control 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, a pair of screws 6
By tightening or loosening 5, 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 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 missing tooth portions 33c and 33d symmetrically with respect to a partial tooth portion 33b having approximately three teeth. . When the first gear 33 is in a stationary state before operation, the toothless portion 33c corresponds to the gear 16 (a part of the gear transmission mechanism 20), and the partial tooth portion 3.3 is operated by a start trigger lever to be described later. b is restricted from biting into the gear 16. On the other hand, the second gear 3/l also has 180
Two toothless portions 34c and 34d are formed with a pitch of 0, and when the second gear is in a stationary state before operation, the toothless portion 340 is connected to the gear 18 (part of the gear transmission mechanism 20). In addition, the rotation of the second gear is regulated so that the toothed portion does not enter the gear 18, as will be described later.

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 34 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 connected to the rear end bent portion 3a of the chassis 3. It is attached so that it can swing 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 connected to a coil spring 70.
is biased clockwise in FIG. 17. These prohibition levers 69 and coil springs 70 cause the control plate 39 to move forward, and when the control plate 39 reaches its maximum forward movement position (leftward movement limit position), the control plate moves backward (moves to the right). A prohibition means is constituted to prohibit.

On the other hand, as is particularly clear from FIG.
A protrusion 33f that can be engaged with is formed. That is, the first
When the gear 33 initially moves, the protrusion 33f of the first gear engages with the engagement protrusion 69b, and the lever 69 swings counterclockwise in FIG. Board 39
This means that the state in which the return movement is prohibited is canceled.

The above-mentioned prohibition means (consisting of the prohibition lever 69 etc.), the control plate 39, the coil spring 40 as a biasing means for biasing the control plate in the backward motion direction (rightward), and the first gear 33
A coil spring 35 serves as a biasing means for biasing the first gear in a direction in which the partial gear 33b meshes with the gear 16 (a part of the gear transmission mechanism 20), and the right tooth of the second gear 34 is a gear. 18 (a part of the gear transmission mechanism 20), the claw member 51a and the spring member 51a, which serve as biasing means for biasing the second gear in the direction of meshing with the gear transmission mechanism 20, and peripheral small members related thereto, 33 and the second gear 34 start rotating, after the first gear 33 meshes with the gear 16, the second gear 34 starts rotating.
Trigger means for meshing the gear 34 with the gear 18 is configured.

As shown in FIGS. 2, 7, 9, and 18, a trident-shaped start trigger lever 73 is rotatable at the center of the front surface of the sub-chassis A11. is attached to.

As is clear from FIGS. 7 and 18, one end 73a of the start trigger lever 73 is bent rearward at a right angle, and the bent portion can be engaged with the first gear 33. . More specifically, the pin 33a protruding from the rear surface of the first gear 33 passes through the first gear and protrudes from the front surface of the first gear by a predetermined amount, and the pin 33a protrudes from the front surface of the first gear 33 by a predetermined amount. is adapted to engage with this portion protruding from the front surface, thereby restricting the rotation of the first gear 33. A second end 731 formed on the start trigger lever 73 and extending to the right is connected to the lever AI.
2 from the lower surface of the left end. 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 as the end detection lever 10 moves upward, the start trigger lever 73 is By rotating clockwise in FIG. 18, the rotation restriction state of the 111fl wheel 33 is released. The start trigger lever 73 has a third end 730 extending downward, and the third end engages with the left end of the magnetic head switching command rod 75 shown in FIG. The magnetic head switching command rod 75 is attached to the lower surface of the chassis 3 so as to be able to reciprocate in the left-right direction, is made of a steel plate, and is formed into a single character shape as a whole. 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, as shown in FIG. 10, a coil spring 6 is disposed near the head switching command rod 75 to apply a rightward bias to the third end 73c of the start trigger lever 73. . As shown in FIGS. 2, 3, and 17, an electromagnetic solenoid 77 is disposed near the motor 24 and extends from side to side, and is fixed on the chassis 3. Electromagnetic solenoid 77
The movable rod 77a projects to the right with respect to the solenoid body, and a pin 77b extending in the vertical direction is fitted into the tip of the movable rod. The lower end of the bin 77b is loosely fitted into an elongated hole 3C formed on the main surface of the chassis 3 and extending in the left-right direction, and is engaged with the right end of the magnetic head switching command rod 75. That is, electromagnetic solenoid 7
When the movable long door 7a of No. 7 is pulled, the magnetic head switching command rod 75 moves to the left (therefore, the start trigger lever 73 rotates clockwise in FIG. 18).
This is how it is done. Further, as shown in FIG. 1, an operation switch group 79 is arranged on the front surface of the housing 2 and to the right of the opening 2a, and one switch of the operation switch group is connected to the electromagnetic solenoid. It serves as a changeover command switch for operating 77. As shown in Fig. 2, Fig. 4, Fig. 10, and Fig. 17, the control plate 39 is removed (the front surface of the bent rear end portion 3a of the chassis 3 that has been pulled is placed in the same direction as the control plate). That is, the moving member 81 is attached so as to be movable 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 three control plates. 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 three control plates as the first gear 33 rotates. Moving member 81
A coil spring 82 is connected to the right end of the movable member to give a rightward thrust to the movable member.

As is particularly clear from FIG. 3, the moving parts I, J' 81
A lever E83 formed in a T-shape is disposed on the right side of the lever E83, and 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 the moving member 81.
It is connected to the rear end of the coil spring 84 via a coil spring 84. That is, as the moving member 81 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.
It is possible to engage with a convex portion 390 and a concave portion 39h formed at the rear end portion of 9, 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 39a, 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 regulating portion 39d formed on the control plate engages with the stop pins 34a and 34b of the second gear 34, thereby preventing the rotation of the second gear. is regulated.

As shown in FIGS. 2, 3, 9, and 17, an electromagnetic solenoid 8G is arranged above the electromagnetic solenoid 77 in parallel with the electromagnetic solenoid.
It is fixed on the chassis 3. This electromagnetic solenoid 8
A movable rod 86a of No. 6 protrudes leftward with respect to the solenoid body, and a pin 86b extending in the front-rear direction is fitted at the tip of the movable rod. This bottle 86b is pivotally attached to the tip of a third end 83d formed on the lever [83 and extending upwardly. In addition, the movable rod 8
6a is in its protruding position (the position shown in FIG. 17), the pin 83C of the lever E83 engages with the rear end protrusion 39 (+) of the control plate 39.The electromagnetic solenoid 86 It 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 86a of the electromagnetic solenoid 86 is retracted as the movable member 81 moves to the left. Therefore, the pin 83c of the lever E83 engages with the rear end recess 39h of the control plate 39. Also, when the key is in the OFF state, the movable member 81 is The movable rod 86a is pulled out by the biasing force of the coil spring 82 biasing rightward, so that the pin 830 of the lever E83 engages with the rear end protrusion 39Q of the control plate 39.

By the above-mentioned moving member 81, coil spring 82, lever [E83, coil spring 84, electromagnetic solenoid 86, and surrounding small members related to these,
A prohibition/cancellation means is configured that prohibits the control board 39 from returning to the most backward movement position (rightward movement limit position) when the power is turned off, 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 that rotatably holds the idler gear 28 is a capstan. Note that, as shown in FIG. 10, this shaft member 30a is attached to the flywheel 2.
The rotation support of 7 is also 11. On the other hand, as is particularly clear from FIGS. 3 and 5, a pair of supports (+1189) projecting upward are provided on the chassis 3 near the capstan 30a; An arm member 91 having a pinch roller 90 rotatably attached to its free end 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 extends vertically through the arm member, and a spring 66 (for adjusting the azimuth of the magnetic head 49) is attached to the lower end of the left edge of the bottle. For example, see FIG. 5) is engaged at one end. 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 56c 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 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 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 removed from the capstan 30a. That is, the pair of pinch rollers 90 selectively move the capstan 3 due to the reciprocating movement of the slide member 56, which is a component of the head rotation mechanism described above.
This can be explained from 0a.

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 are opposed to each other. Further, on the left side of the protrusion 47a, there is a recess 4.7 continuous to the protrusion.
b is formed.

These protrusions 47a and recesses 4.7b 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. ing. When the mountain-shaped protrusion 47a engages with the bin 30d, the support lever 30 swings in the direction in which the idler gear 28 attached to the support lever separates from the double gear 5f of the reel unit 5, and the protrusion 47a Subsequently, when the recess 47b engages with the bin 30d, the support lever 30 returns to the position where the idler gear 28 meshes with the double gear 5f.

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 at the rear end is connected to the sub-chassis B95 and the support protrusion 3d provided at the left rear end of the chassis 3. It can be installed 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 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 held in the cassette holder. Further, the swinging member 9G swings downward by a predetermined angle from this state, and the position of the cullet holder 98 when the cassette half held by the cassette holder 98 is positioned at the playing position is changed to the lowered position of the cassette holder. It is called. The cassette holder 98 is movable between this lowered position and the above-mentioned raised position.

A movable member 101 is attached to the lower surface of the cassette holder 98 and is movable in the insertion and ejection direction of the cassette half, that is, in the front-rear direction, and is made up of two members, an upper surface part 99 and a right side member 100, and engages with the cassette half. (It is spelled. On the right side of the moon 100 is the bottle 100a15"
The bin is slidably fitted into a long hole 95a formed in the sub-chassis B95 extending 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 bin 1008.

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 boulder 98 falls into the 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 for biasing the swinging member clockwise in FIG. 13. As the moving member 1.01 moves rearward in the cassette half insertion direction, the cassette holder '98 is urged toward the double 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 99G protrudes 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 installation are reduced. The aim is to reduce costs.

=L 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 four part 107 called a label area formed on the cassette half. In this way, by engaging the protrusion 99e with the recess provided in the cassette half, the protrusion 99e
This makes the state of engagement of 9e with the cassette 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 3" A leaf chassis C111, which is also shown in FIG. You can take it freely.''[It's being pulled.

The front end portions, that is, the operating end portions of each of the manual operating levers are separated by a predetermined distance from side to side, and each operating end portion has an operating button 115.11 provided on the front surface of the housing 2.
6 (shown in the first diagram) has been removed and A4 has been replaced. The longitudinal operating lever 113 disposed at the bottom is for performing the FF operation by its forward movement, that is, backward movement, and the longitudinal operating lever 11/I disposed at the upper side is for forward movement. R in motion
This is for performing EW operation. Each of these longitudinal operation levers 113 and 114 is arranged above the magnetic head 49. In addition, both longitudinal operation levers 113 and 114 are
The forward thrust is controlled by coil springs 118 and 119, respectively. As is particularly clear from FIGS. 7 and 15, the longitudinal operating levers 113 and 114
Tapered portions 113a and 114a are provided on the left side of the rear end portion of the head stand 47 so as to be able to engage with the upper end portion of the longitudinal bin 121 protruding from the left end of the upper surface of the head stand 47 when the head stand is moving rightward.
is formed. That is, when the head stand 47 is moving to the right, these longitudinal operation levers 113 and 114
By pressing either of the buttons, the head stand 47 is moved to the left by a predetermined amount, thereby separating the magnetic head 49 from the magnetic tape. Further, when the head stand 47 is moved to the left by a predetermined amount by operating the longitudinal operation lever in this way, the protrusion 4.7a formed on the head stand 47 moves into the pin of the support lever 30 that holds the idler gear 28. 30d, thereby causing the idler gear 28 to move away from the double gear 5f of the reel unit 5. 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, and the reel units 1 to 1 are moved by the claw member.
The reverse rotation prevention state of 5 is canceled.

Returning to the original topic, as shown in FIG. 2, FIG. 3, and FIG. It is arranged so that it can be moved freely in any direction. Play 1-12/
A coil spring 125 is connected to the upper end protrusion 124a of the plate 4 to provide a forward bias 61 to the plate. A T-shaped lever l-1126 is rotatably attached to the front end of the plate 124 at its center. In particular, as is clear from FIG. 16, at the front edge of the first end 126a formed on the lever 1-1126 and extending downward, the longitudinal operating lever 113 described above is attached.
The rear edge of the protrusion 113C extending downwardly is brought into contact with the protrusion 113C. Further, a protrusion 1 is provided on the front edge of the second end portion 126b formed on the lever H126 and extends upward, and is provided on the longitudinal operation lever 114 so as to protrude approximately to the left.
171. The trailing edge of C is abutted. That is, by pressing the longitudinal operation levers 113 and 114, respectively,
The lever H126 rotates counterclockwise and clockwise in FIG. 16.

A lever 1129 shaped like a dogleg is disposed in front of the plate 124, and is rotatably attached to the left bent portion 3f of the chassis 3 at its central bent portion. A bottle 129b is protruded from the tip of a first pant portion 129a formed on the lever 1129 and extending rearward, and this bottle 129b is formed on a third end 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, each pair of reel units 5 and flywheels 2
A swing lever 130 is disposed extending in the left-right direction at a position sandwiched between the levers 7 and 7, and is swingably attached to the chassis 3 through a bin 130a at a substantially central portion thereof. The left end of the swinging lever 13O is the second end 1 of the lever ■129.
It is pivotally attached to the tip of 29C. Further, on the lower surface of the right end of the 1z moving lever 130, there is a gear transmission mechanism 13 consisting of three gears 132, 133 and 134 meshing in series.
5 is provided. The gear 132, which is the first stage gear of the gear transmission 1, is connected to each gear portion 2 of the pair of flywheels 27.
7a, and the final stage gear 134 is designed to be able to mesh with a small diameter gear portion formed on the double gear 5 of the reel unit 5. Namely. When the longitudinal operation levers 113 and 114 are pressed, respectively, the swinging lever 130 is activated via the lever 1-1126.
swings rearward and forward, whereby the reel units 1 to 5 arranged at the rear and front are alternatively rotated at high speed.

As shown in FIG. 2, FIG. 7, FIG. 15, and FIG. An intermediate lever 138 is provided that can reciprocate in the direction of movement (back and forth direction) of the longitudinal operation lever. A coil spring 139 is connected to the intermediate lever 138 to provide 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
is slidably engaged with. 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 is configured to be able to swing by a predetermined angle mark about the support shaft 138b on the front end side thereof. Further, a coil spring 139 that urges the intermediate lever 138 forward is tensioned so as to be inclined to the right from the rear to the front. 15
It is also biased counterclockwise in the figure. That is,
When the longitudinal operation levers 113.1'14 are simultaneously moved forward (move backward), the pin 138a of the intermediate lever 138 fits into the recess 140a of the elongated hole 14.0, and this causes the intermediate lever 130 to move backward. It is configured to move to. However, if only one of the longitudinal operating levers 113' and 114 of the controller 1 is moved forward, the elongated hole 1 formed in the other longitudinal operating lever
Since the rear right edge 1401) of the intermediate lever 138 is still in contact with the bin 138a, the intermediate lever 138 cannot be moved backward.

Although not detailed, F"longitudinal operation lever 1 for operation"
A mechanism is provided for locking either one of the longitudinal operating lever 13 and the longitudinal operating lever 114 for RFW operation in the forward movement position when the longitudinal operating lever is moved forward.

Further, when the other longitudinal operating lever is moved forward, the long 21M structure locks the longitudinal operating lever in the forward movement position, and unlocks the one longitudinal operating lever. In addition, each longitudinal operation lever 113. When one of the "ill" buttons is pressed, a lever J142 provided at the rear of the longitudinal operation lever is swung clockwise in FIG. 15, and the mute switch 143 is operated.

For example, as is clear from FIGS. 2 and 7, a bottle 138d is protruded from the upper surface of the rear end of the intermediate lever 138, and the bottle 138d is attached to the left end of the swinging member 96 (for example, shown in FIG. 6). 96a.

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 on the side of the mute switch 143 and their arrangement will be explained.

As is clear from FIGS. 2 and 6, the subchassis 8
A bracket 146 is attached to the right end surface of the switch 95, and two switches 147 and 148 are attached to the bracket. The switch 147 is used to switch the power to the cassette deck and a tuner disposed near the cassette deck. Further, the switch 148 is for operating the motor 24. Both switches 147 and 148 are both activated mechanically when the cullet half is inserted into the cullet holder 98.

As shown in FIGS. 2, 7, and 18, a switch 149 for switching between "F" and "REW" is fixed on the front surface of the left end of the sub-chassis Δ11. It operates by engaging a moving plate 52 attached to the chassis 8.

In addition, as shown in FIG.
A switch 150 for cutting off power supply to the cassette deck is fixed on top of the cassette deck 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 cassette half 155 (shown in FIG. 19) from the frontage 2a of the housing 2 shown in FIG.
The cassette half is held in a cassette holder 98 as shown in FIGS. As shown in FIG. 20, the cassette half 155 is attached to the cullet holder 98.
By being inserted inside, the right side member 100 moves rearward, thereby causing the swinging support shaft 9 of the cassette holder 98 to move.
8a falls into the recess 1001 of the right side member 100, and the cassette holder is moved to the lowered position.

Therefore, the cassette half is set at the playing position.

Along with this cassette half insertion operation, the switches 147 and 148 shown in FIG.
starts rotating. When the motor 24 rotates, as shown in FIG. 10, the small pulley 24a is rotated in the direction of arrow 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, respectively. . 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, slack in the magnetic tape in the cassette half 155 is wound up.

When the slack in the magnetic tape is wound up and a predetermined tension is applied to the magnetic tape, all parts H of the constituent members of the reel unit 5 shown in FIG. The shape of the double gear 5f is fixed by the reaction force, 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, for example, the end detection gear 171 shown in FIGS. 7 and 18 is rotated counterclockwise in FIG. 18 via the gear transmission mechanism 20 by the rotation of the motor 2/I. Therefore, the bottle 101) protruding from the end detection lever 10 is moved to the top of the mountain-like protrusion 141) 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 end detection lever 1
The bottle 10b of O has a mountain-shaped protrusion 14. It does not continue sliding along b. Therefore, the bin 1 of the end detection lever 10
0b 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 bottle 10b. Therefore, the end detection lever 10 moves upward,
The start trigger lever 73 is activated via the lever A12.
Rotate clockwise in Figure 8. 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, is now able to rotate, and due to the biasing force of the coil spring 35, the first gear 33 is rotated as shown in FIG. It can be rotated clockwise. Therefore, both partial portions 33b of the first gear 33 mesh with the gear 16, and the first gear begins to rotate. The rotation of the first gear 33 causes the control plate 39 shown in FIG. 17 to move to the left, and therefore the head stand 47 moves to the right as shown in FIG. comes into contact with. When the control plate 39 reaches the maximum forward movement position (the leftward movement limit position), the control plate 39 stops its return movement ( movement to the right) is prohibited. As the first gear 33 rotates, the moving member 81 also shown in FIG. 17 etc.
is also moved to the left as shown in Figure 23. Accordingly, the lever E83 is rotated in the yaw direction as shown in FIG. 23, and the movable rod 86a of the electromagnetic solenoid 86, which is already in the on state, is pushed in. By this operation, the pin 83c of the lever E83 comes to engage with the recess 39h formed at the right end of the control plate 39, and therefore the control plate 39
It becomes possible to move to the most backward movement position (the rightward movement limit position). Further, as the pin 39e of the control plate 39 enters the engagement recess 69a of the prohibition lever 69, the prohibition lever 69 rotates a predetermined amount clockwise as shown in FIG. Mute switch 1/13, which had been turned on via J142 (for example, see FIG. 7), is turned off.

On the other hand, as shown in FIG. 22, by moving the head stand 47 to the right, the front idler gear is separated from the double gear 5f of the front reel unit 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, it will not be explained in detail here. Further, as shown in FIG. 22, as the head stand 47 moves to the right, the rear pinch roller 90 comes into contact with the capstan 30a, and the other, that is, the front pinch roller 90, contacts the capstan 30a. Remains detached from stun. 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 were engaged with the reel unit 5 are separated 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 long door 7a of the electromagnetic solenoid is pulled. Therefore, the start trigger lever 7 is activated via the magnetic head switching command rod 75.
3 rotates clockwise as shown in FIG. The partial tooth portion 33 of the first gear 33 is rotated clockwise in FIG.
I'+ meshes with gear 16, and the first gear begins to rotate. Immediately after the 1st f4 wheel 33 starts rotating, the protrusion 33f protruding from the 1st gear moves the prohibition lever 69 (see Fig. 17).
17 to rotate the inhibiting lever counterclockwise in FIG. 17. Then, the engagement state between the engagement recess 69a of the prohibition lever and the pin 39e of the control plate 39 is released from -53~, and the control plate 39 is instantly moved to the most backward position (rightward direction) by the biasing force of the coil spring 4o. It is forced to return to the limit of movement @). 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 forced to separate from the magnetic tape.

When the control plate 39 is at its most 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 340 is regulated. 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 and the spring member 5 shown in FIG.
1b causes the second gear 34 to rotate clockwise in FIG. 18. Therefore, the toothed portion of the second gear 34 meshes with the gear 18, and the second gear begins to rotate. As the second gear 34 rotates, the stop bin 34a protruding from the second gear moves to the claw portion 52 of the moving plate 52.
a, the moving plate is moved to the left, and the magnetic head 49 connected to the moving plate moves 1 toward the REV side.
Rotated 80 degrees. Further, as the moving plate 52 moves to the left, the switch 149 is switched from the FWD side to the REV side.

The rotation of the second gear 371 causes the stop bin 371 . a is a protrusion 39 formed on three control plates
C (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 18° rotation, the stop bin 3711. a is detached from the protrusion 39c of the control plate 39, and then the pin 33 of the first gear 33
a engages with the three protrusions 39a of the control plate, and the control plate 39 is moved to the forward movement position (the leftward movement limit position) and locked by the prohibition lever 69 as described above.

As the control plate 39 moves forward, the head stand 47 moves to the right again, and the magnetic head 149 comes into contact with the magnetic tape. Furthermore, the mute switch 143 is also turned off in the same manner as described above.

Further, as the moving plate 52 moves to the left, the slide member 56 moves forward, and as a result, the head stand 47 moves to the right, the rear idler gear 28 is separated from the reel unit 5, and the front idler gear 2
8 is engaged with the reel units 1 to 5, and only the front reel unit 5 starts rotating. Further, the front pinch roller 9° 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 F:WD 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 bin 34b of the first gear 33
This operation 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 521 (shown in Figure 18) and moves the moving plate to the right. , not detailed.

Next, the operation of the sizing 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 terminal end, and the double gear 5 of the 114 components of the reel unit 5 shown in FIG.
All members except f are fixed by the reaction force of the tension. Therefore, only the double gear 5f continues idling with respect to these fixed members via the felt 1 to the plate 5h. The members are also rotating except for the arm member 51. Furthermore, the arm member 51 receives a biasing force caused by the rotational force, and moves the intermediate lever 7 via the floating lever 8 in the counterclockwise direction in FIG. As a result, the end detection lever 10, to which the rear end of the intermediate lever is pivoted, rotates in the counterclockwise direction in FIG.
= I-forced bottle 10 protruding from the end detection lever
b is the mountain-like protrusion 1/1 of the end detection gear 14. b, and the protrusion 14c of the end detection gear and the bottle 10
It is impossible for b to engage. However, when the members of the reel unit 5 except for the double gear 5f become fixed together with the tape stopper, the force that urges the end detection lever 10 also disappears, and the protrusion 14c of the end detection gear 14 moves into the bin of the end detection lever. 10b. Therefore,
The end detection lever 1o moves upward, and the start trigger lever 73 rotates clockwise in FIG. 18 via the lever AI2. The following operation is exactly the same as the operation of switching the tape transport direction from the FWD side to the REV side by pressing the switch described above. Note that automatic switching of the tape transport direction from the REV side to the FWD side is performed in the same manner as described above, and will not be described in detail.

Next, FF operation (tape fast forward operation) and REW operation (
(tape rewinding operation) will be explained.

For example, when performing FF operation during tape playback, as shown in FIGS. 24 and 25,
Press 13 to move it backwards.

Then, the mute switch 14 is activated via the lever J142.
3 is turned 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, and thereby the head stand 717 is moved to the left by a predetermined distance 4-J. , magnetic head 4
9, the contact state of the magnetic deso is loosened.

As is clear from FIG. 25, when the longitudinal operation lever 113 is moved backward, the protrusion 113C of the longitudinal operation lever
The lever H12G that engages with is swung in the counterclockwise direction in FIG. 25. In the evening, the lever 1129 also swings in the direction of the hour in FIG. 25, thereby:
As shown in FIG.
It rotates in one direction about 0a in the opposite direction in FIG. 26. Therefore, the first gear 132 of the gear transmission mechanism 135 provided on the swing lever is connected to the rear flywheel 27.
The final stage gear 134 meshes with the small diameter gear portion of the double gear 5 of the rear reel unit 5. On the other hand, when pressing the longitudinal operation lever 1113,
: By moving the head stand 47 to the left, the pair of idler gears 28 are moved 1tlf Di away from the reel unit 5. Therefore, the rear reel unit 5 rotates at high speed, and the tape is rapidly forwarded.

When performing a REW operation, this is done by pushing the REW operation longitudinal control lever 114. That is,
The projection 114C of the longitudinal operation lever 114 is connected to the lever 11.
26, the lever H engages with the 26th second @ part 126b, and the lever H
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 round unit. Note that the head stand 47 is moved to the left by the tapered portion 114a of the longitudinal operation lever 114 engaging with the longitudinal bin 121 provided on the head stand 47.

When ejecting the cassette half after tape reproduction is finished, the FF operation longitudinal operation lever 113 and the REW operation operation longitudinal operation lever 114 may be moved at the same time. Part 2
By simultaneously pressing the wooden longitudinal operating levers, the intermediate lever 138 (for example, shown in FIG. ). By the exact opposite operation of loading the cullet half 1555, the cassette half is projected into the listener's neck for collection. In addition, for example, since the switch 150 shown in FIG. 24 also operates, the electromagnetic solenoid 86 (second
3) 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 bin 83c provided on the lever F83 can engage with the convex portion 39Q formed on the right end portion of the control plate 39. This prohibits the control plate 39 from returning to the backward movement position (rightward movement limit W position).

That is, the stop bin 34 . of the second gear 34 . a is maintained in a state where it is engaged with the regulating portions 39d of the three control plates, so that when the power is turned on again, the second gear 34 does not rotate, and the tape transport direction is unnecessarily switched. This means that they are prevented from being exposed.

As mentioned above, the above-mentioned turning off operation of the electromagnetic solenoid 86 is also performed when the key of the automobile in which the cassette deck is mounted is turned off.

11. As detailed above, in the cassette deck according to the present invention, each of the reel units (5) to be engaged with the cassette reel is detachably provided to receive rotational driving force from the drive source. An idler gear (28) for transmitting data to the reel unit can be selectively removed from the reel unit by a head rotation mechanism for rotating the magnetic head (49). Therefore, compared to a cassette deck in which a mechanism for rotating the magnetic head and a mechanism for attaching and detaching the idler gear to and from the reel unit are separately provided, it is easier to reduce the size and cost of the cassette deck as a whole.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a cassette deck according to the present invention, FIG. 2 is an exploded perspective view of the internal structure of the cassette deck, and FIGS. 3 to 8 are partial detailed perspective views of the internal structure.
FIGS. 9 and 10 are plan and rear views of the internal structure, FIGS. 11 to 18 are detailed views of the internal structure, and FIGS. 19 to 26 are views of the operation of the cassette deck. FIG. Explanation of symbols of main parts 1...Cullet deck 2...Housing 2a...Front area 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 5C...Color 5d...
Bush 5e... Expanded diameter part 5f...
Double gear 5G, 5U, 30b, 35,140. /1
゜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, 130a. 138a, 13BcJ---Bin 7b, 64a... Opening 7C, 56C... Notch 8... Idle lever 10... End detection lever 10a , 14c, 33f, 39a, 39b. 39C, 42a, 47a, 49a, 56e. 81a, 99c, 99e, 113c. 114C...Protrusion 11...Sub-chassis A 12...Lever A 14...End detection gear 14a,' 39h, 47b, 100b. 140a...Protrusion 14b...Protrusion 16.17, 18.19.61, 132°133.13
4...Gear 20.135...Gear transmission machine drawing 22...
・Tsum 23...Pulley 24...
・Motor 24a...Small pulley 25...
... Belt 27 ... Flywheel 2
7a, 27b... Gear part 28... Idler gear 3o... Support lever 30a... Capstan 33. Old.
・First gear 33b...Partial tooth portions 33c, 33d, 34c, 311d-old-missing tooth portion 34・
...Second gears 34a, 34b...Stop bin 36.121
・Old...Plate 39...Control board 39d・Old...Restriction part 39C]...Protrusion 42...
・Lever B44...Lever C4,7...
- Head stand 49... Magnetic heads 51a, 123... Claw members 51b, 99d... Spring member 52... Moving plates 52a, 52b... ...Claw portion 53...Lever D 54.66...Spring 56...Slide member 56d, 113a, 114a...Tapered portion 57...・Bearing member 59... Fan-shaped gear 64... Regulation member 65...
Screw 69...Prohibition lever 69a...
・Engagement recess 69b...Engagement protrusion 73...Start trigger lever 73a...
...One end portion 73b, 83b, 126b, 129c ...Second Is portion 75...Magnetic head switching command rod 77.86
......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... Binge roller 91... Arm part + A95... Sub chassis B 96... Swinging part +1 96a... ...
・Left end portion 98...Cassette boulder 98a...
.....Owing shaft 99 .....Top member 1
00... Right side part 101... Moving member 102... Lever F106...
・Reel hole 107... recess 111...
...1 Pub chassis C 113,114...Longitudinal operation lever 115.1
16... Operation button 121... Longitudinal pin 124a... Upper end protrusion 126...
...Lever H129...Lever ■130...
... Swinging lever 138 ... Intermediate lever 14
0b... Rear right edge 142... Levy J 143... Mute switch 146... Bracket 147.1/'18, 149, 150...・・・・Switch 155・・・・・Power mouth and half procedure Neichi official book (method)

Claims (1)

[Claims] A magnetic head rotatably supported around an axis substantially perpendicular to the magnetic tape contact surface, a head rotation mechanism for rotating the magnetic head, and a pair of reel units to be engaged with the cassette reel, respectively. and an idler gear that is detachably provided to transmit rotational driving force from a drive source to the reel unit, and the idler gear is selectively detached from the reel unit by the head rotation mechanism. cassette deck.