JPH0732764U - Tape cassette - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a tape cassette in which the brake member does not move and the hub does not rotate to loosen the magnetic tape even when a strong shock is applied while the magnetic tape is not running. [Structure] A brake member 2 for preventing rotation of the hub is slidably provided in a cassette main body accommodating a pair of hubs 5 around which a magnetic tape 4 is wound, and an opening of the lower surface is provided on the lower surface of the cassette main body. A slider for closing the slider is slidably provided, and a lid is rotatably provided on the cassette body,
When the lid is rotated while the slider is open, the tip bulge on the outer surface of the brake arm of the brake member engages with the protrusion on the inner surface of the side plate of the lid, and the brake member slides to brake the hub. To release. A protrusion 71 is provided on the inner surface side of the side frame plate 7 of the slider, and a concave portion 11 is provided on the outer surface side of the side wall of the cassette main body. It is pressed against the side wall of the main body, and the inner surface side of the tip bulging portion is fitted into the concave portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention prevents the movement of the brake member when the tape cassette, more specifically, the magnetic tape is not running and is subjected to a strong impact such as a drop of the cassette. Concerning tape cassettes that are not likely to loosen.

[0002]

[Prior art]

 As shown in FIG. 3, a tape cassette generally contains a pair of hubs 5 and 5 on which a magnetic tape 4 is wound, in a cassette body composed of an upper half and a lower half 1 (the upper half is not shown). A brake member 2 for preventing rotation of the hubs 5 and 5 is provided slidably in the front-rear direction of the cassette along the inner surface of the upper harf so that the brake member 2 serves as a brake spring when the magnetic tape 4 is not running. The hubs 5 and 5 are biased in a direction (front side in FIG. 3) that prevents the hubs 5 and 5 from rotating (not shown). In FIG. 3, the brake member 2 attached to the upper half side is shown in a form projected on the inner surface of the lower half 1.

As shown in FIG. 3, the brake member 2 is provided with a pair of engaging claws 21 and 21 which can be engaged with the hubs 5 and 5 when the magnetic tape 4 is not running, and the left and right sides of the engaging claws 21 and 21. A pair of brake arms 3 and 3 extending to the front end side of the cassette are provided at both ends, and the tip ends of the brake arms 3 and 3 respectively swell to the outside of the cassette as shown in FIG. The tip bulges 31, 31 for engagement are provided.

A slider for closing an opening (not shown) provided in the lower half 1 on the lower surface (outer surface) of the lower half 1 when the cassette is not used (when the magnetic tape 4 is not running). 6 is provided slidably in the front-back direction of the cassette. The slider 6 has side frame plates 7 and 7 on both left and right sides thereof, and has a substantially U-shaped cross section (inverted shape). The slider spring 8 constantly keeps the front end side (closed direction) of the cassette. The lock claw (not shown) protruding from the lower half 1 is configured so that it cannot be slid at the closed position.

Although not shown, a lid for opening and closing the front end of the cassette body by pivoting is provided at the front end of the upper half. A pair of side plates are provided on both left and right ends of the lid so as to contact the outside of the brake arms 3 and 3, respectively, and the central portions of the side plates are pivotally supported by the upper halves to rotate the lid. It is possible to move. In addition, a convex portion for engagement is provided at one end on the inner side of the side plate.

When the magnetic tape 4 is not running, the lid is in a closed state, and the slider 6 is in a non-slidable state by the lock claw in the closed position shown in FIGS. 3 and 4. There is. Further, in the closed state of the lid, since the slider 6 is partly moved forward within the rotation range of the lid, the rotation of the lid 6 is hindered and the lid 6 is directly rotated. It is configured so that it cannot be moved.

When the cassette is loaded in the drive, the mechanism on the drive side first releases the non-sliding state of the slider 6 by the lock claw, and then the slider 6 is attached with the slider spring 8 The cassette is slid to the rear end side (the front side in FIG. 3) against the force, and as a result, the lid can be rotated, and the lid can be rotated in the opening direction. The lid causes the convex portions of the side plates to engage with the distal end bulging portions 31, 31 of the brake arms 3, 3 by this rotation, and the lid further rotates in this state, whereby the brake member 2 Is pulled to the front end side of the cassette against the urging force of the brake spring, the brake member 2 retracts to the front end side of the cassette, and is separated from the hubs 5 and 5 as a result. The brake is designed to be released.

That is, when the magnetic tape 4 is not traveling, the rotation of the hubs 5 and 5 is blocked by the urging force of the brake spring urging the brake member 2 (broken). Also, when the magnetic tape 4 is running, the brake is released by rotating the lid against the biasing force of the brake spring. Therefore, the urging force of the brake spring cannot be increased so much. However, in normal use, it is necessary to prevent the hubs 5 and 5 from rotating when the magnetic tape 4 is not running. You can

[0009]

[Problems to be solved by the device]

 However, when a strong impact is applied to the cassette such as when the tape cassette is dropped by mistake, the brake member 2 may move. When the brake member 2 moves, the hubs 5 and 5 may rotate and the magnetic tape 4 may loosen.

Therefore, an object of the present invention is to prevent the brake member from moving even when a strong impact such as a drop of a cassette is applied when the magnetic tape is not running. Therefore, the hub rotates to cause the magnetic tape to rotate. The purpose is to provide a tape cassette that does not loosen.

[0011]

[Means for Solving the Problems]

 According to the present invention, a brake member that prevents rotation of the hub is slidably provided in a cassette body that houses a pair of hubs around which a magnetic tape is wound, and the lower surface of the cassette body has an opening on the lower surface. A slider that closes is slidably provided, and a lid that opens and closes the front end portion is rotatably provided at the front end portion of the cassette main body, and when the lid is open, the lid member is rotated to rotate the brake member. In the tape cassette configured so that the bulge on the outer surface of the brake arm engages with the protrusion on the inner surface of the side plate of the lid, the brake member slides, and the brake of the hub is released. , A protrusion is provided on the inner surface side of the side frame plate of the slider, and a concave portion is provided on the outer surface side of the side wall of the cassette body, so that the braking state of the brake member In addition, while the slider is in the closed state, the protrusion presses the tip bulging portion of the brake arm against the side wall of the cassette body, and the inner surface side of the tip bulging portion is fitted into the concave portion. The above object is achieved by providing a tape cassette characterized by the following.

[0012]

[Action]

 According to the tape cassette of the present invention, when the magnetic tape is not running (when the brake member is at the break position and the slider is at the closed position), the protrusion of the slider causes the tip bulge of the brake arm to move to the cassette. Since the brake arm is pressed against the side wall of the main body and the inner surface side of the tip bulging portion is fitted into the recessed portion of the side wall, the brake member acts on the cassette main body together with the urging force of the brake spring. The drag in the recess prevents its movement.

Further, when the cassette is used and loaded in the drive, the slider on the closed position slides to the open position by the mechanism on the drive side. As a result, the tip bulging portion of the brake arm is moved to the slider. The brake arm returns to its original shape and the tip of the brake arm is released from the recessed part of the cassette body.Under this condition, the closed lid is rotated and the brake is released. The arm is engaged with the side plate of the lid, the brake member slides to the front end side of the cassette, the brake of the hub is released, and the magnetic tape can be run.

[0014]

【Example】

 An embodiment of the tape cassette of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the lower half side of an embodiment of the tape cassette of the present invention as viewed from the inside, and FIGS. 2A and 2B are magnetic tapes of the cassette shown in FIG. It is sectional drawing which expands and shows the principal part at the time of non-traveling and traveling.

As shown in FIG. 1, the tape cassette according to the present embodiment has a pair of hubs 5 each having a magnetic tape 4 wound inside a cassette body composed of an upper half and a lower half 1 (the upper half is not shown). A brake member 2 for accommodating the hub 5 and blocking the rotation of the hubs 5, 5 is provided slidably in the front-rear direction of the cassette along the inner surface of the upper half so that the brake member 2 can be moved when the magnetic tape 4 is not running. Is urged by a brake spring (not shown) in a direction (front side in FIG. 1) that prevents rotation of the hubs 5, 5. In FIG. 1, the brake member 2 attached to the upper half side is shown as being projected on the inner surface of the lower half 1.

As shown in FIG. 1, the brake member 2 is provided with a pair of engaging pawls 21 and 21 that can engage with the hubs 5 and 5 when the magnetic tape 4 is not running, and the left and right sides are A pair of brake arms 3 and 3 extending to the front end side of the cassette are provided at both ends, and tip ends of the brake arms 3 and 3 for engagement are respectively bulged to the outside of the cassette for engagement. Outgoing parts 31, 31 are provided.

A slider for closing an opening (not shown) provided in the lower half 1 on the lower surface (outer surface) of the lower half 1 when the cassette is not used (when the magnetic tape 4 is not running). 6 is provided slidably in the front-back direction of the cassette. The slider 6 has side frame plates 7 and 7 on both left and right sides thereof, and has a substantially U-shaped cross section (inverted shape). The slider spring 8 constantly keeps the front end side (closed direction) of the cassette. The lock claw (not shown) protruding from the lower half 1 is configured so that it cannot be slid at the closed position.

Although not shown, a lid for opening and closing the front end of the cassette body by pivoting is provided at the front end of the upper half. A pair of side plates are provided on both left and right ends of the lid so as to contact the outside of the brake arms 3 and 3, respectively, and the central portions of the side plates are pivotally supported by the upper halves to rotate the lid. It is possible to move. In addition, a convex portion for engagement is provided at one end on the inner side of the side plate.

When the magnetic tape 4 is not running, the lid is in the closed state, and the slider 6 is in the non-sliding state by the lock claw in the closed position shown in FIG. In addition, in the closed state of the lid, a part of the slider 6 is advanced into the rotation range of the lid, so that the slider 6 hinders its rotation, and the slider 6 directly rotates. It is configured so that it cannot be moved.

When the cassette is loaded in the drive, the mechanism on the drive side first releases the non-sliding state of the slider 6 by the lock claw, and then the slider 6 is attached with the slider spring 8 to the slider 6. The cassette is slid to the rear end side (the front side in FIG. 1) against the force, and as a result, the lid is rotatable, and the lid is rotatable in the opening direction. The lid causes the convex portions of the side plates to engage with the distal end bulging portions 31, 31 of the brake arms 3, 3 by this rotation, and the lid further rotates in this state, whereby the brake member 2 Is pulled to the front end side of the cassette against the biasing force of the brake spring, the brake member 2 is retracted to the front end side of the cassette, and its engaging pawls 21 and 21 are separated from the hubs 5 and 5, As a result, the brakes on the hubs 5 and 5 are released, and these points are the same as those of the conventional product of this type.

Thus, in the tape cassette of this embodiment, as shown in FIG. 2, a protrusion 71 is provided on the inner surface side of the side frame plate 7 of the slider 6 and a recess is formed on the outer surface side of the side wall of the cassette body. When the brake member 2 is in the braking state and the slider 6 is in the closed state, the projection 71 presses the tip end bulging portion 31 of the brake arm 3 against the side wall of the cassette body, and the tip end is provided. The inner surface side of the bulging portion 31 is fitted in the concave portion 11.

The tape cassette of the present embodiment will be further described. As shown in FIGS. 1 and 2, the protrusion 71 is a semi-cylindrical protrusion of the inner surface side of the side frame plate 7, The portion 11 is formed by cutting out the outer surface side of the side wall of the lower half 1 in a substantially “F” shape in section (the opposite side is an inverted “F” shape), and the front end side end surface of the lower arm 1 slides the brake arm 3. It is designed to be almost perpendicular to the direction. The protrusion 71 and the recess 11 are provided so as to satisfy the following conditions.

That is, when the brake member 2 is in the braking position and the slider 6 is in the closed position, the protrusion 71 is exactly the tip bulge of the brake arm 3 as shown in FIG. 2A. Abut 31. Further, the brake arm 3 whose tip bulge 31 is pushed by the protrusion 71 bends the tip side inward of the cassette due to the elasticity of the brake arm 3, and at that time, the brake bulge 3 The inside of the cassette is just fitted into the recess 11, and the tip of the brake arm 3 contacts the end surface of the recess 11 on the front end side.

Further, as shown in FIG. 2B, when the slider 6 slides from the position shown in FIG. 2A to the open position side, the brake arm 3 returns to its original linear shape due to the restoring elastic force. The shape is restored so that the tip end thereof is separated from the inside of the recess 11.

In the tape cassette of the present embodiment configured as described above, when the magnetic tape 4 is not running (when the brake member 2 is in the brake position and the slider 6 is in the closed position). As shown in FIG. 2 (a), the front end of the brake arm 3 abuts on the front end side end surface of the recessed portion 11, and the brake member 2 causes the recessed portion of the cassette main body together with the urging force of the brake spring. The movement of the portion 11 is prevented by the drag force.

Therefore, in the tape cassette of this embodiment, when the magnetic tape 4 is not running (the above-mentioned brake member 2 is at the brake position that blocks the rotation of the hubs 5 and 5, and the slider 6 is closed). (When it is in the state position), the brake member 2 does not move even if a strong impact such as a drop of the cassette is applied, and the rotation of the hubs 5 and 5 is reliably prevented. There is no danger that the magnetic tape 4 will rotate due to the rotation of the magnetic tape 5.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and the protrusion is provided on the inner surface side of the side frame plate of the slider and the concave portion is provided on the outer surface side of the side wall of the cassette body. When the brake member is in the braking state and the slider is in the closed state, the protrusion presses the tip bulging portion of the brake arm against the side wall side of the cassette body, and the inner surface side of the tip bulging portion is in the concave portion. It only needs to be fitted. For example, the protrusion of the slider does not have to be a semi-cylindrical shape as in the above embodiment, and the cross-sectional shape of the recess does not have to be a "F" shape. Further, the normal shape of the brake arm may not be linear.

[0028]

[Effect of device]

 The tape cassette of the present invention does not cause the brake member to move even when a strong impact such as a drop of the cassette is applied when the magnetic tape is not running. Therefore, the hub does not rotate and the magnetic tape does not loosen. .

[Brief description of drawings]

FIG. 1 is a plan view of the lower half side of an embodiment of the tape cassette of the present invention as viewed from the inside.

2 (a) and 2 (b) are enlarged cross-sectional views of the main part of the cassette shown in FIG. 1 when the magnetic tape is not running and when it is running, respectively.

FIG. 3 is a view corresponding to FIG. 1 in a conventional tape cassette.

FIG. 4 is a view of a conventional tape cassette shown in FIG.
(A) It is a corresponding figure.

[Explanation of symbols]

 1 Lower Half 11 Recessed Part 2 Brake Member 3 Brake Arm 4 Magnetic Tape 5 Hub 6 Slider 7 Side Frame Plate 71 Protrusion

Claims (1)

[Scope of utility model registration request] 1. A brake member for preventing rotation of the hub is slidably provided in a cassette body accommodating a pair of hubs around which a magnetic tape is wound, and an opening portion of the lower surface is provided on a lower surface of the cassette body. A slider that closes the slider is slidably provided, and a lid that opens and closes the front end portion is rotatably provided at the front end portion of the cassette body, and the brake member is rotated by the rotation of the lid when the slider is open. In the tape cassette configured so that the tip bulging portion on the outer surface side of the brake arm engages with the protrusion on the inner surface side of the side plate of the lid, the brake member slides, and the brake of the hub is released. , A protrusion is provided on the inner surface side of the side frame plate of the slider, and a concave portion is provided on the outer surface side of the side wall of the cassette body, so that the braking state of the brake member is reduced. Further, in the closed state of the slider, the protrusion pushes the tip bulging portion of the brake arm against the side wall side of the cassette body, and the inner surface side of the tip bulging portion is fitted into the concave portion. Characteristic tape cassette.