JPH079230Y2 - Grip device in loading mechanism of tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cassette gripping device in a loading mechanism of a rotary head type digital audio tape recorder (R-DAT).

(Prior Art) Among standardized digital audio tape recorders (DAT), a standard rotary head type (R-DAT) cassette is constructed as shown in FIGS. 6 (A) and 6 (B). .

FIG. 6A is a perspective view, and FIG. 6B is a perspective view seen from the bottom side. The main body 51 of the cassette 50 includes an upper shell 52 and a lower shell 53.
A grip groove 64 for loading is formed near the front edge of the upper shell 52. In the figure, 54 is a lid on the front side of the main body 51, 55 is a slider that is always biased by an internal spring in a forward direction, and the lid lock portion 55a at the tip is used to slide the lid forward. By locking and retracting, the lid becomes free, and the hub hole 56 formed in the slider corresponds to the reel hub hole 57 of the main body 51. Reference numeral 58 is a lock claw for locking the slider 55, 59 is a notch for unlocking the slider formed in the lid, 60 is a notch for preventing slider misinsertion (for slider retreat), 61 is a cassette identification hole, 62 is an erasure prevention hole, and 63 is a positioning hole.

When loading the cassette configured as described above into the deck, it is possible to grip by gripping from both sides of the cassette, but it requires a large space for arranging the clamping mechanism, and the space inside the deck Since there is a drawback that the factor deteriorates, it is desirable to use the grip groove 64 in order to downsize the device.

(Problems to be solved by the invention) However, the grip groove 64 in the R-DAT cassette
Since the groove is extremely shallow, a means for accurately gripping the cassette using the groove is required, and when a claw member or the like that engages with the grip groove is arranged, the claw is retracted when the cassette is loaded. It must be a structure and must have a structure that can release the grip properly at the time of ejection.

The present invention has been made in view of the above points, and an object of the present invention is to ensure that a grip claw is retracted when a cassette is loaded in a loading mechanism of an R-DAT cassette and a grip is reliably secured when an eject is performed. It is to provide a grip device that can be released.

(Means for Solving Problems) A grip device in a loading mechanism of a tape cassette according to the present invention is designed to grip a cassette inserted in a loading port in a loading mechanism of a rotary head type digital tape recorder. A slider disposed on the chassis so as to slide in the direction of pulling in or sending out to the cassette holder side, and a claw formed at the tip thereof is rotatably supported by the slider so as to rotate in a direction of engaging with a grip groove on the upper surface of the cassette. The claw member and a stopper provided on the chassis so that the claw member abuts and the claw at the tip end is lifted at the most advanced position of the slider.

(Operation) At the most advanced position of the slider, the claw member supported by the slider is in contact with the stopper provided on the chassis and the claw at the tip thereof is lifted up. Insert until the tip comes into contact with the slider tip.

Next, when the loading motor rotates in response to the loading command signal and the slider starts to move backwards through the lever mechanism, etc., the contact state of the pawl member with the stopper is released, and the pawl member rotates due to the urging force to lower the tip side. Then, the claw engages with the grip groove.

When the slider is retracted, the cassette is drawn into the cassette holder and the holder is lowered, but the grip groove is released from the claw when the cassette holder is lowered.

When ejecting, when the cassette holder rises and returns to the original position, the pawls come into contact with the grip groove of the cassette, and the slider moves forward to push the cassette out of the holder, and when the slider slides to the most advanced position, the pawl member Is brought into contact with the stopper, the tip side is lifted, the claw is separated from the grip groove, and the grip state is released.

(Embodiment) An embodiment of the grip device in the loading mechanism of the tape cassette according to the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a plan view of the entire loading mechanism,
2 is a left side view of the same as above, FIG. 3 is a perspective view of a grip device, FIG. 4 is a perspective view of a slider and a claw member held by the slider, and FIGS. 5 (A) to 5 (C) are views of the grip device. It is a side view which shows an operating state.

First, the overall structure of the loading mechanism 1 will be briefly described. A push-openable lid 2 composed of upper and lower flaps is arranged on the front side where the R-DAT cassette 50 explained with reference to FIG. 6 is to be loaded. There is. This lid 2 is always urged to close, but the lid opening / closing motor 2M
The gear mechanism 21, slide lever 22 and link mechanism
It can be opened and closed via 23 etc. 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 arranged.

The grip device for holding the cassette is a slider 5 that slides in the direction in which the cassette 50 is drawn into the cassette holder 4 or sent out from the holder 4, and a claw 16 formed at the tip engages with a grip groove 64 on the upper surface of the cassette. The claw member 6 supported by the slider 5 so that the rotation fulcrum 14 is positioned below the claw 16 while being biased to
And the claw member 6 at the most forward position of the slider 5.
And a stopper 7 formed on the chassis 3 so that the claw 16 at the front end can be lifted.

To explain the above configuration in detail, the chassis 3 has a guide groove 13
Is formed, and a guide projecting ridge portion 8 protruding from the upper surface of the slider 5 is fitted to this, and is fixed slidably by fixing a cover plate 9. Legs 10 project downward from both front sides of the slider 5, and the claw members 6 are supported by the legs. Further, the guide jetty portion 8 extends in the forward direction, and restriction stopper portions 11 are formed on both sides thereof. Reference numeral 12 is a spacer portion protruding from the upper surface of the slider 5 so that the contact frictional resistance to the bottom surface of the chassis 3 is reduced.

The pawl member 6 is made of a metal plate and is formed in an L-shaped cross section so as to have a leaf spring effect by itself, and a bearing portion 6a formed at the base end of the vertical portion is pivotally supported on the leg portion 10. Being a rotation fulcrum
The pawl 16 is arranged so as to rotate around the center 14, and the claw 16 is formed at the tip of the horizontal portion, and the engaging portion 15 is formed by cutting and raising both sides of the horizontal portion. A notch for spring arrangement is formed in the center of the horizontal portion, and a coil spring 17 is inserted between the notch and the tip surface of the slider 5.
Therefore, the pawl member 6 is always biased to rotate clockwise (direction F in FIG. 5A), but the engaging portion 15
Is partially regulated by engaging with the regulation stopper portion 11, so that the rotation fulcrum 14 is always located at a height h below the tip of the pawl 16. The stopper 7 is formed on the chassis 3 on the running track of the outer edge of the engaging portion 15, and is displaced from the running track of the restriction stopper section 11.

The above-mentioned slider 5 includes a rotary lever 20 at the final stage via a loading motor 1M, a gear mechanism 18, a lever mechanism 19 and the like.
To slide between positions A and B in FIG.
Although not shown, a lock release portion for pushing the lock claw 58 of the cassette 50 is provided on the bottom surface of the cassette holder 4, and a slider 55 in the unlocked state is slid on the rear edge side. Engaging claws and the like are provided for opening the slider 55 when the cassette 50 is completely drawn into the cassette holder 4. Further, the lid 54 of the cassette is opened in the process of lowering the cassette holder 4. Next, an operation example will be described. As shown in FIG. 5 (A), at the most advanced position of the slider 5, the engaging portion 15 of the claw member 6 abuts on the stopper 7 and the claw 16 at the tip thereof is moved. The cassette 50 is in a lifted state, and in this state, the cassette 50 is inserted from the loading port until its tip comes into contact with the tip of the slider 5. Then, the loading motor 1M is rotated by the loading command signal, and the slider 5 starts to retreat via the lever mechanism 19 and the like. As a result, the contact state of the engaging portion 15 with the stopper 7 is released, so that the claw member 6 is rotated in the F direction by the biasing force of the coil spring 17 and the tip side is lowered, as shown in FIG. 5 (B). Thus, the pawl 16 engages with the grip groove 64 of the cassette 50.

When the slider 5 is retracted, the cassette 50 is drawn into the cassette holder 4, the slider 55 of the cassette is slid in the process, and the lid 54 is opened in the process of lowering the holder, and the holder 4 is completely lowered. The setting of the cassette in the predetermined position is completed in this state. The grip groove 64 is released from the claw 16 when the cassette holder 4 is lowered, and the state of the claw member 6 at this time is shown in FIG. 5 (C).

When ejecting, when the cassette holder 4 rises and returns to the original position, the pawl 16 abuts and engages with the grip groove 64 of the cassette, and the slider 5 moves forward to push the cassette 50 out of the holder 4 and the slider 5 moves to the maximum position. When it slides to the forward position, the tip end side is lifted by the engagement portion 15 contacting the stopper 7, the pawl 16 is separated from the grip groove 64, and the grip state is released.

(Effects of the Invention) According to the grip device in the loading mechanism of the tape cassette according to the present invention, the R-DAT cassette can be securely gripped with a simple configuration including the slider, the claw member, and the stopper.

In particular, at the most advanced position of the slider, the structure is such that the claw at the tip of the claw member is lifted and retracts. Therefore, the claw does not hinder when the cassette is loaded, and the slider moves to the most advanced position at the time of ejection. As a result, the pawl can be lifted and the grip can be released properly, which is optimal as a grip device in this type of R-DAT loading mechanism.

[Brief description of drawings]

1 to 5 show an embodiment of a grip device in a loading mechanism of a tape cassette according to the present invention. FIG. 1 is a plan view of the entire loading mechanism, FIG. 2 is a left side view of the same as above, and FIG. FIG. 4 is a perspective view of the grip device, FIG. 4 is a perspective view of a slider and a claw member held by the slider, and FIG.
8A to 8C are side views showing the operating state of the grip device. FIGS. 6A and 6B are perspective views showing the R-DAT cassette. 1: Whole loading mechanism, 2: Lid, 3: Chassis, 4: Cassette holder, 5: Slider, 6: Claw member, 7: Stopper, 11: Restriction stopper part, 15: Engagement part, 16: Claw, 50: Cassette, 64: Grip groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minoru Shinkawa 2-17-5 Shibuya, Shibuya-ku, Tokyo Kenwood Co., Ltd. (56) Bibliography Sho 63-149447 (JP, U)

Claims (1)

[Scope of utility model registration request] In a loading mechanism of a rotary head type digital tape recorder, in order to grip a cassette inserted in a loading port, a slider arranged on a chassis so as to slide in a direction in which the cassette is pulled in or sent out to a cassette holder side. And a claw member rotatably supported by the slider so that the claw formed at the tip rotates in a direction to engage with the grip groove on the upper surface of the cassette, and the claw member abuts at the most advanced position of the slider to bring the tip into contact. And a stopper provided on the chassis so that the claws of the tape cassette can be lifted.