JPH0633566Y2 - Loading mechanism of tape cassette - Google Patents

Description

The present invention relates to a loading mechanism of a rotary head type digital audio tape recorder (R-DAT), and more particularly to a mechanism capable of ensuring accuracy with a simple configuration. It is a thing.

(Prior Art) Of the digital audio tape recorders (DAT), the standardized R-DAT cassette is shown in FIG. 12 (A).
It is configured as shown in FIG.

12A is a perspective view and FIG. 12B is a perspective view seen from the bottom side. The main body 101 of the cassette 100 is composed of an upper shell 102 and a lower shell 103, and near the front edge of the upper shell 102. A grip groove 114 for loading is formed. In the figure, 104 is a lid on the front side of the main body 101, 105 is a slider that is always urged by an internal spring in the forward direction,
Slide forward to lock the lid lock 105a at the tip.
By locking and retracting the lid, the lid becomes free, and the hub hole 106 formed in the slider corresponds to the reel hub hole 107 of the main body 101. 108 is slider 1
05 is a lock claw for locking 05, 109 is a notch for unlocking the slider formed on the lid, 110 is a notch for preventing slider mis-insertion (for slider retreat), 111 is a cassette identification hole, and 112 is wrong An erasure prevention hole and 113 are positioning holes.

When the cassette deck configured as described above is loaded and loaded, the cassette can be gripped by sandwiching it from both sides, but such a clamping means has a drawback that the space factor inside the deck deteriorates. In order to reduce the size of the device, it is desirable to use the grip groove 114 provided as a standard.

On the other hand, if it is attempted to downsize the device in order to fully exert the advantages of downsizing of the cassette, it becomes difficult to secure the accuracy in the movable part such as the loading mechanism.

(Problems to be solved by the invention) As a loading mechanism which is advantageous for downsizing of a device, a cassette holder in which a cassette inserted from a loading port is gripped using the grip groove 114 and is vertically movable The cassette is set in a predetermined position by accommodating it inside and lowering the holder, and when ejecting, the holder is raised to feed the cassette to the loading port.

However, if the size of the device is reduced, it becomes difficult to ensure the accuracy of each operating portion. For example, the electric system side (driving source) that ensures the accuracy of the stop position of the movable member and the engagement position with other members ( It is extremely troublesome to do it at the position where the motor on / off microswitch is arranged, etc., and if this is done on the mechanism side, the consistency with the electric system side becomes troublesome and it does not match. May have a load on the drive source side, resulting in electromechanical variations in individual devices.

Generally, in this kind of loading mechanism, it is sufficient to secure the accuracy of the start end and the end required for the desired operation during the operation stroke of the movable part, and the accuracy is not so high after the intermediate process or after the end of the intended operation. Is often not required.

The present invention has been made from such a point of view, and its purpose is not only to be able to load the R-DAT cassette accurately but also to make the mechanism compact and to achieve the intended operation. It is an object of the present invention to provide a tape cassette loading mechanism capable of ensuring the required precision of the start and end of strokes and absorbing electrical or mechanical variations.

(Means for Solving Problems) A tape cassette loading mechanism according to the present invention stores a cassette inserted from a loading port in a cassette holder that is vertically movable, and the cassette is lowered by lowering the holder. In the loading mechanism of the rotary head type digital tape recorder configured to set the cassette to a predetermined position, the first mechanism is arranged to move the cassette holder up and down by sliding operation by the drive source.
Member, a second slide member arranged to engage with the first slide member to perform a sliding operation, and spring means for holding the engaged state of the first and second slide members. And a grip device having a rotation lever that is rotated by the sliding operation of the second slide member, a grip fitting that is slid by the rotation of the rotation lever, and is biased in a direction to engage with the grip groove of the cassette, and an engagement portion. And an engaging means arranged so as to contact the engaging portion of the grip device when the grip device slides to the most forward position on the loading port side, and the grip device is provided on the loading port side. Due to the contact between the engaging portion of the grip device and the engaging means when sliding to the most advanced position,
The grip fitting is configured to open against the elastic force.

This structure will be described with reference to the drawings. The cassette 100 inserted from the loading port is housed in a cassette holder 4 which is vertically movable, and the holder 4 is lowered to set the cassette at a predetermined position. Although configured, a first slide member 1 slidingly operated by a motor 1M as a drive source via a conversion mechanism 1G, and a second slide member 2 engaged with the first slide member and slidingly operated. Is placed on the chassis 3, and when the first slide member 1 slides to a predetermined position, the cassette holder 4 supported by the support mechanism 8 moves up and down, and the first and second slide members 1 and 2 are The engaged state is held by the spring means (12), and the rotation lever 5 which is rotated by the sliding operation of the second slide member 2 and the rotation of the rotation lever. A gripping device 6 that slides arranged Te, grip bracket provided on the gripping device 6
16 the grip groove of the cassette at all times by spring means (61)
Engaging means 7 is urged in the direction of engaging with 114, and when the grip device 6 slides to the most forward position on the loading port side, the grip fitting 16 is released against the elastic force. It is provided on the chassis 3.

(Operation) When the grip device 6 is at the most advanced position on the loading port side, the grip fitting 16 is opened by the engaging means 7, and when the cassette 100 is inserted from the loading port in this state, the grip groove 114 grips. It comes to the position corresponding to the metal fitting 16. Motor 1
By the rotation of M, the first slide member 1 slides through the conversion mechanism 1G, and when the second slide member 2 engaged with this slides, the rotary lever 5 rotates and the grip device 6 begins to retract. The grip fitting 16 which is disengaged from the engaging means 7 is engaged with the grip groove 114 by its urging force to grip the cassette, and when the grip device 6 is retracted, the cassette 100 is drawn into the holder 4.

When the cassette 100 is housed in the holder 4, the holder 4 is lowered by the first slide member 1 that has slid to a predetermined position, and the cassette is set at the predetermined position.

When ejecting, the first and second slide members 1 and 2 slide in opposite directions due to the reverse rotation of the motor 1M,
The holder 4 is raised by the slide member 1 and the rotary lever 5 is rotated by the second slide member 2 to move the grip device 6 forward. When the grip device slides to the most forward position on the loading port side, the grip fitting 16 engages with the engaging means 7 to release the engagement with the grip groove 114, and the grip fitting 16 is opened against the biasing force thereof. The cassette can be taken out from the loading port.

At this time, even if there are variations in the rotational inertia of the motor 1M, the operation of the first and second slide members 1 and 2, the operation of the rotating lever 5 and the grip device 6, and the like, the spring means (61) and the spring. It can be absorbed by means (12).

(Embodiment) An embodiment of a tape cassette loading mechanism according to the present invention will be described with reference to FIGS. 1 to 11. FIG. 1 is a plan view of the entire loading mechanism, and FIG. FIG. 3 is a right side view showing the state in which the state is raised and a raised state is seen through, FIG. 3 is a left side view showing the same, FIG. 4 is a perspective view of the cassette holder, FIG. FIG. 7 is a perspective view of an essential part of the same as above, FIG. 7 is a plan view of a main chassis showing a disposition state of a second slide member, a rotating lever and a grip device, and FIG.
FIG. 9 is a perspective view of an essential part showing the positional relationship of the slide members, FIG. 9 is a perspective view of the essential part showing the relationship between the rotary lever and the grip device, FIG. 10 is a perspective view of the grip device, and FIGS. (B) is a side view of the main part showing the operating state of the grip fitting.

First, the overall structure of the loading mechanism will be briefly described. The R-DAT cassette 100 described with reference to FIG. It is arranged. This lid
Although 11 is always urged in the closing direction, it is configured to be opened and closed by the lid opening / closing motor 2M via the conversion gear mechanism 2G, the slide lever 33, the link mechanism 34, etc. arranged on the left side surface of the chassis 3. ing.

Inside the chassis 3, a cassette holder 4 including a bottom plate 41, both side walls 42, and a guide piece 43 whose upper end is bent inward is disposed so as to be able to move up and down, and a cassette 100 inserted from a loading port is gripped by a grip device. It is configured to be gripped by 6 and accommodated in the cassette holder 4, and the cassette is set to a predetermined position by lowering the holder, and the cassette is sent out from the holder by the grip device 6 when the holder 4 is raised during ejection. ing.

Both side walls 42 of the cassette holder 4 configured as described above
A mounting plate 44 is mounted on the mounting plate 44. A notch 45 is formed on one mounting plate and a guide pin 46 having a roller 46a is arranged on the mounting plate 44, and the guide pin is formed on the chassis 3. It is adapted to move up and down along the guide groove 31.

The support mechanism 8 for supporting the cassette holder 4 so as to be lifted and lower supports the rear end portion 82 of the support frame 81 rotatably on the chassis 3 and the front end portion 83 at both side walls 42 of the cassette holder 4.
A coil spring 85 is stretched between the support frame 81 and the mounting plate 44 so that the cassette holder 4 can be pivotally pivoted. Further, a stopper portion 47 protruding upward is formed on the tip end side of the mounting plate 44, and the upper limit position of the cassette holder is regulated by contacting the stopper portion 47 with the chassis 3. Support point of the support frame 81
A guide roller 86 is arranged on the side slightly smaller than 8a and is engaged with a guide groove 13 having a bent step portion formed in the first slide member 1 described below.

The first slide member 1 is arranged on the right side surface of the chassis 3, and the roller pin 14 protruding from the chassis 3 is inserted into the guide hole 15.
It is slidably supported by engaging with, and slides through the conversion mechanism 1G by the rotation of the loading motor 1M, but the conversion mechanism 1G is engaged with the engagement pin 1P protruding from the final stage gear 1g of the reduction gear. By engaging with the rack-shaped recess 16 formed in the first slide member 1, the rotary motion is converted into the linear motion with a simple structure. Therefore, when the first slide member 1 slides in one direction (forward direction) and reaches a predetermined position, the support frame 81 supports the fulcrum 8a.
It is configured so that it rotates downward about the center and the cassette holder 4 descends accordingly.

The second slide member 2 slidably supported by the roller pin 24 and the guide hole 25 is arranged on the right upper surface of the chassis 3 in the same manner as the first slide member 1 described above.
The first slide member 1 and the second slide member 2 are engaged with each other by the engaging portions 17 and 18 which are respectively formed to project, and the first slide member 1 and the second slide member 2 are engaged with each other.
A coil spring 12 is suspended between the two, and the engaged state is elastically maintained. Therefore, the second slide member 2
Slides with the slide of the first slide member 1, but the first slide member 1 resists the elastic force of the coil spring 12 even when a large load is applied to the second slide member 2 when sliding in the backward direction. Can retreat alone.

The rotary lever 5 is placed so as to overlap the second slide member 2.
Is provided, but is supported by the pivot pin 51 projecting from the chassis 3 by protruding through the elongated hole 21 formed in the second slide member 2. A guide long hole 52 is formed on the rear end side of the rotary lever 5, and a roller pin 22 arranged on the side edge of the second slide member 2 is engaged with the guide long hole 52 to form the second slide member 2. When it slides, the rotary lever 5 rotates in conjunction with this.

An engaging pin 62 of the grip device 6 is provided on the tip side of the rotary lever 5.
An engaging elongated hole 53 that engages with the engaging elongated hole is formed, but a restricting lever 54 that rotates around a fulcrum 54a for restricting one side edge of the engaging elongated hole is arranged, and the tip of the restricting lever 54 is It is engaged with an engagement groove 55 formed at the tip and is urged by a spring 56. Therefore, even if there is variation in the engagement between the roller pin 22 and the guide elongated hole 52, this is absorbed, and the engagement state between the engagement elongated hole 53 and the engagement pin 62 of the grip device 6 is accurately ensured. You can do it.

The grip device 6 slides along the guide groove 32 formed in the chassis 3 between the loading port side, which is the most advanced position, and a predetermined position, but as shown in FIGS. The guide jetty portion 64 provided in the above is fitted in the guide groove 32, and is slidably supported by attaching a cover plate 65 from the upper surface. Legs 66 project downward from both sides of the slider body 63, and the grip fittings 16 are supported on the legs so as to rotate about a fulcrum 16a. Further, the tip of the guide jetty portion 64 extends in the forward direction, and regulation stopper portions 67 are formed on both sides thereof.

The grip metal fitting 16 is made of a metal plate and has a substantially L-shaped cross section so as to have a leaf spring effect by itself, and a claw portion 68 is formed at the end of the horizontal portion. An engaging portion 69 is formed by cutting and raising. A notch for spring placement is formed in the center of the horizontal portion, and a coil spring 61 is inserted between the notch and the tip of the slider body 63. Therefore, although the grip metal fitting 16 is always biased to rotate clockwise (direction F in FIG. 11A),
A part (inner edge) of the engaging portion 69 is the regulation stopper portion 67.
It is regulated by engaging with the rotation fulcrum 16a.
Is located below the claw 69.

The engaging means 7 is a stopper projection bent on the chassis 3 on the running track of the outer edge of the engaging portion 69, and when the grip device 6 slides to the most forward position on the loading port side. The engaging portion 69 abuts against this and the spring
The grip metal fitting 16 is pushed up against the elastic force of 61. This state is shown in FIG. 11 (B). When the cassette 100 is inserted in this state, the grip groove 1
14 is located directly below the claw portion 68, and when the grip device 6 retracts as shown in FIG. 11C, the claw portion 68 engages with the grip groove 114.

(Effect of the Invention) According to the loading mechanism of the tape cassette according to the present invention, when the grip device is at the most forward position on the loading port side, the grip fitting is opened by the engaging means and is inserted from the loading port. When loading the cassette, the cassette is provided with a first slide member, a second slide member that engages with the first slide member, slides by a rotation lever that rotates by the second slide member, and a grip device that slides by rotation of the rotation lever. Is configured to grip the cassette to accommodate the cassette in the cassette holder and to lower the holder by the slide of the first slide member to set the cassette in a predetermined position. It can be done accurately.

When ejecting, the first and second slide members slide in opposite directions to raise the holder, and the rotation of the rotary lever causes the grip device to advance to eject the cassette, but the grip device reaches the most advanced position. When sliding, the grip fitting is engaged with the engaging means to open against the biasing force of the engaging means to release the grip, and the first and second slide members are brought into the engaged state by the spring means. Since it is held, even if there are variations in the engagement and operation of the above-mentioned actuating members, they can be properly absorbed, and even if an excessive load is applied when the cassette is ejected, the spring means prevents It is suitable for this kind of loading mechanism that needs to be miniaturized because it can absorb the load and can set the settings of each part relatively roughly. .

[Brief description of drawings]

1 to 11 show an embodiment of a loading mechanism for a tape cassette according to the present invention. FIG. 1 is a plan view of the entire loading mechanism, and FIG. 2 is a perspective view of a lowered state and a raised state of a cassette holder. The same right side view, FIG. 3 is the same left side view, FIG. 4 is a perspective view of the cassette holder, and FIG. 5 is a plan view showing the cassette holder supporting mechanism.
FIG. 7 is a perspective view of an essential part of the same as above, FIG. 7 is a plan view of a main chassis showing a disposition state of a second slide member, a rotary lever and a grip device, and FIG. 8 is a disposition relation of the first and second slide members. FIG. 9 is a perspective view of an essential part showing the relation between the rotary lever and the grip device, FIG. 10 is a perspective view of the grip device, and FIGS. 11 (A) to 11 (C) are grip fittings. FIG. 6 is a side view of the main part showing the operating state of FIG. 12 (A) and (B) are perspective views showing the R-DAT cassette. 1: first slide member, 2: second slide member, 3: chassis 4: cassette holder, 5: rotary lever, 6: grip device,
7: Engaging means 12: Coil spring, 16: Grip metal fitting, 61: Coil spring, 10
0: Cassette 114: Grip groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minoru Shinkawa 2-17-5 Shibuya, Shibuya-ku, Tokyo Kenwood Co., Ltd. (56) Bibliography 60-159550 (JP, U) -194737 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A rotary head type digital tape recorder configured so that a cassette inserted from a loading port is accommodated in a cassette holder that is vertically movable, and the cassette is set at a predetermined position when the holder descends. In the loading mechanism, the first slide member is arranged so as to move up and down the cassette holder by being slid by a drive source, and the first slide member arranged so as to engage with the first slide member and slide. Second slide member, spring means for holding the engaged state of the first and second slide members, a rotary lever rotated by the sliding operation of the second slide member, and a slide by the rotation of the rotary lever. Together with a grip fitting and an engaging portion that are biased in a direction to engage with the grip groove of the cassette. Device,
Engaging means arranged so as to abut the engaging part of the grip device when the grip device slides to the most advanced position on the loading port side, and the grip device has the most advanced position on the loading port side. When the tape cassette is slid to a position, the grip portion is configured to open against the elastic force by the contact between the engaging portion of the grip device and the engaging means. Loading mechanism.