JPH0710877U - Tape cassette - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To provide a tape cassette in which the brake member does not move and the hub does not rotate and the magnetic tape does not loosen when the magnetic tape is not running and is subjected to a strong impact such as a drop of the cassette. [Structure] When the lid 9 is rotated, a bulging end of a brake arm of a brake member engages with a convex portion of the lid, and the brake member slides to release a brake of a hub. In the tape cassette, a wedge-shaped projection 32 is provided on the inner surface side of the side frame plate 7 of the slider 6, in which the front upper edge portion or the front lower edge portion is inclined.
The side wall of the cassette body is provided with a through hole including a long hole portion 11a in the front-rear direction and a long hole portion 11b in the up-down direction, or a groove portion including a front-rear groove and a vertical groove, and the brake arm 3 has a transparent hole. Providing an engagement protrusion 32 that is fitted into the hole or groove,
When the brake member is in the braking state and the slider 6 is in the closed state, the tip end bulging portion 31 of the brake arm is moved upward or downward by the wedge-shaped projection.

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. 5, 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 urged by a not-shown direction in the direction in which the rotation of the hubs 5 and 5 is blocked (front side in FIG. 5). In FIG. 5, 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. 5, the brake member 2 is provided with a pair of engaging claws 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 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.

Further, on the lower surface (outer surface) of the lower half 1, there is provided a slider 6 that closes an opening provided in the lower half 1 when the cassette is not used (when the magnetic tape 4 is not running). It is provided so that it can slide in the front-back direction. The slider 6 has side frame plates 7 and 7 at both right and left ends thereof, and has a substantially U-shaped cross section (inverted), and a slider spring 8 constantly keeps the front end side (closed direction) of the cassette. In the closed position, the lock claw (not shown) protruding from the lower half 1 makes it impossible to slide.

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 is 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 portion of the side plates is pivotally supported by the upper half to rotate the lid. It is possible to move. In addition, an engaging convex portion is provided on each of the inner ends of the side plates.

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 pawl at the closed position shown in FIGS. 5 and 6. 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 (front side in FIG. 5) 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 urging force of the brake spring, the brake member 2 retracts to the front end side of the cassette and separates from the hubs 5 and 5, and 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 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 the front end portion of the cassette body is opened and closed. A lid is rotatably provided, and a slider for closing an opening portion of the lower surface is slidably provided on the lower surface of the cassette main body. When the lid is opened, the lid is rotated, whereby the brake member is rotated. In the tape cassette configured so that the bulging end of the brake arm engages with the convex portion of the lid and the brake member slides to release the brake of the hub, the side frame plate of the slider is A wedge-shaped protrusion is provided on the inner surface side, with the upper edge on the front side or the lower edge on the front side inclined, and a long hole in the front-rear direction and a vertical length in the side wall of the cassette body. And a groove portion consisting of a longitudinal groove and a vertical groove, and the brake arm is provided with an engagement protrusion to be fitted into the through hole or the groove portion. In this state and in the closed state of the slider, the bulge of the tip of the brake arm is moved upward or downward by the wedge-shaped protrusion, and at this time, the engaging protrusion of the through-hole or groove is moved. The above object is achieved by providing a tape cassette characterized in that it can be moved into a vertically elongated hole or groove.

[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 tip end bulging portion of the brake arm is normally moved by the wedge-shaped protrusion. It is moved above or below the level in the vertical direction, and at that time, the engaging projection is moved into the vertical hole or groove of the through hole or groove, so that the brake member is used for braking. Along with the biasing force of the spring, the vertical edge of the cassette body or the side edge of the groove prevents movement of the cassette toward the front end.

Further, when the cassette is used for loading in the drive, the slider on the closed position slides to the open position by the mechanism on the drive side, and at the same time, the wedge-shaped projection also underlies the tip bulging portion. Or, since it moves away from the upper position to the rear end side of the cassette, the tip bulge that was moved by the above-mentioned wedge-shaped projection into the vertical hole or groove of the through hole or groove is From the inside of the elongated hole portion or groove in the direction to the intersection with the elongated hole portion or groove in the front-rear direction. Then, the lid in the closed state is rotated, the bulging portion of the tip of the brake arm engages with the convex portion of the lid, and the brake member slides to the front end portion side of the cassette. The brake of the hub is released by sliding the inside of the slot or groove in the front-rear direction to the front end side of the cassette, 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 FIG. 2 shows the main part of the cassette shown in FIG. 1 when the magnetic tape is not running, with the slider open. FIG. 3 is an enlarged side view, FIG. 3 is a view corresponding to FIG. 2 showing a main part when the slider is in a closed state, and FIG. 4 is a plan sectional view of the main part in the state shown in FIG.

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 the tip ends of the brake arms 3 and 3 for engagement are bulged to the outside of the cassette. The bulging portions 31, 31 are provided.

Further, on the lower surface (outer surface) of the lower half 1, there is provided a slider 6 that closes an opening provided in the lower half 1 when the cassette is not used (when the magnetic tape 4 is not running). It is provided so that it can slide in the front-back direction. The slider 6 has side frame plates 7 and 7 at both left and right ends thereof, and has a substantially U-shaped cross section (inverted shape). The slider spring 8 constantly causes 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.

A lid 9 for opening and closing the front end portion of the cassette body by pivoting is provided at the front end portion of the upper half (see FIG. 2). A pair of side plates 91, 91 are provided at the left and right ends of the lid 9 so as to contact the outsides of the brake arms 3, 3, respectively, and the central portions of the side plates 91, 91 are respectively pivoted to the upper half. The lid 9 is supported so that it can rotate. Further, projections for engagement are provided at the rear ends on the inner side of the side plates 91, 91, respectively.

When the magnetic tape 4 is not running, the lid 9 is in the closed state, and the slider 6 is in the non-slide state by the lock claw in the closed position shown in FIG. Further, in the closed state of the lid 9, since a part of the slider 6 has advanced into the rotation range of the lid 9, the rotation of the lid 6 is hindered and the lid 6 is directly moved. It is configured so that it cannot be rotated.

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 of the cassette (toward the front side in FIG. 1) against the force, and as a result, the lid 9 can be rotated, and the lid 9 can be rotated in the opening direction. . By this rotation, the lid 9 engages the convex portions of the side plates 91, 91 with the front end bulging portions 31, 31 of the brake arms 3, 3 respectively, and further rotates the lid 9 in that state. , The above-mentioned 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 is retracted to the front end side of the cassette, and its engaging pawls 21 and 21 are engaged with the hub 5 , 5 so that the brakes on the hubs 5 and 5 are released as a result, and these points are constructed in the same manner as the conventional product of this type.

Thus, in the tape cassette of the present embodiment, as shown in FIGS. 2 to 4, a wedge shape in which the front upper edge portion 71a is inclined is provided on the inner surface side of the side frame plate 7 of the slider 6. A protrusion 71 is provided, a through hole 11 including a long hole portion 11a in the front-rear direction and a long hole portion 11b in the up-down direction is provided in the side wall of the cassette body (the lower half 1), and the brake arm 3 is provided with the above-mentioned transparent hole. An engagement protrusion 32 is provided to be inserted into the hole 11 so that the tip end bulging portion 31 of the brake arm 3 is formed by the wedge-shaped protrusion 71 under the braking state of the brake member 2 and the closed state of the slider 6. It is moved to the upper side, and at that time, the above-mentioned engaging projection 32 is moved into the vertically elongated hole portion 11b of the through hole 11.

The tape cassette of this embodiment will be further described. As shown in FIG. 2, the through hole 11 is formed in a substantially inverted L shape. Further, the wedge-shaped projection 71 is formed such that the height from the lower half 1 of the upper edge portion 71a is higher on the rear end side of the cassette, and the tip (cassette) of the upper edge portion 71a. The height of the front end of the brake arm 3 is slightly lower than the position of the lower end of the tip bulging portion 31 of the brake arm 3. When the slider 6 is in the open state, the wedge-shaped protrusion 71 is located closer to the rear end side of the cassette than the front end bulging portion 31 of the brake arm 3.

Further, as shown in FIG. 4, the engaging projection 32 is formed in a rod shape on the inside of the cassette at the tip of the brake arm 3 (the side facing the side wall of the lower half 1). When the brake member 2 slides, it is configured to slide in the longitudinal hole portion 11a of the through hole 11 in the front-rear direction.

Further, the engaging projection 32 has a slight vertical play for sliding the brake member 2, and the tip bulge 31 of the brake arm 3 rides on the upper edge 71 a of the wedge-shaped projection 71. At this time, it is configured to move together with the tip bulge 31 into the vertical slot 11b on the upper half side in the vertical direction perpendicular to the front-rear direction of the cassette. The wedge-shaped protrusion 71, the engagement protrusion 32, and the through hole 11 are preferably provided on both the left and right sides of the cassette, in which case the through hole 11 on the side opposite to the side shown in FIG. 2 of the cassette. The shape is a shape obtained by inverting the left and right of the above-mentioned inverted L-shape, that is, a substantially L-shape.

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. 3, the front end bulging portions 31, 31 of the brake arms 3, 3 are moved upward by the wedge-shaped projections 71, 71 from the normal level (the position of the cassette in the up and down direction). Since the engaging projections 32, 32 are moved into the vertical elongated holes 11b, 11b of the through holes 11, 11, the above-mentioned brake member 2 is pressed by the brake spring and the lower half 1 is pressed. By the side edges of the upward and downward elongated holes 11b and 11b, movement toward the cassette front end side (movement in the direction in which the brakes of the hubs 5 and 5 are released) is prevented.

Therefore, in the tape cassette of this embodiment, when the magnetic tape 4 is not running (the brake member 2 is in the brake position that prevents the hubs 5 and 5 from rotating and the slider 6 is closed). (When it is in the 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, so that the hubs 5 and 5 rotate. Therefore, the magnetic tape 4 does not become loose.

When the slider 6 is slid in the opening direction from the state shown in FIG. 3, the wedge-shaped projections 71, 71 are separated from the lower position of the tip bulging portions 31, 31 to the rear end side of the cassette. Along with this, the tip bulges 31, 31 return to the normal level (the intersection of the vertical elongated hole 11b and the longitudinal elongated hole 11a) together with the engaging projections 32, 32. The slider 6 shown in FIG. 2 is opened. The rotation of the lid 9 causes the tip bulges 31 and 31 of the brake arms 3 and 3 to engage with the protrusions of the lid 9, so that the brake member 2 slides toward the front end of the cassette, and the hub. The brakes 5, 5 are released, and the engaging projections 32, 32 slide to the front end side of the cassette in the elongated holes 11a, 11a in the front-rear direction.

The present invention is not limited to the above-described embodiment, but the wedge-shaped projections in which the upper edge of the front side or the lower edge of the front side is inclined are provided on the inner surface side of the side frame plate of the slider. The side wall of the cassette body is provided with a through hole formed of a long hole in the front-rear direction and a long hole formed in the up-and-down direction, or a groove formed of a groove in the front-rear direction and a groove in the up-down direction. Is provided with an engaging projection to be inserted into the through hole or groove, and when the brake member is in the brake state and the slider is in the closed state, the bulging portion of the tip end of the brake arm is above the wedge-shaped projection. Alternatively, it may be moved to the lower side, and at that time, the engaging protrusion may be moved into the slot or groove in the vertical direction of the through hole or groove.

For example, the lower edge of the front side of the wedge-shaped projection is inclined so that the height from the lower half becomes higher toward the front end side of the cassette, and is substantially inverted on the side wall of the cassette body. An inverted L-shaped (inverted L-shaped upside down) or inverted L-shaped through hole is provided, and the tip of the brake arm is under the braking condition of the brake member and the slider is closed. The bulging portion may be moved downward by the wedge-shaped protrusion, and at that time, the engaging protrusion may be moved into the vertically elongated hole portion of the through hole. Further, the shape of each of the elongated holes in the front-rear direction and the up-down direction of the through hole does not need to be a particularly elongated shape. Further, the through hole may be replaced by a groove portion (consisting of a groove in the front-rear direction and a groove in the up-down direction) provided on the outer surface side of the side wall. Other points can be appropriately changed without departing from the gist of the present invention.

[0030]

[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.

FIG. 2 is an enlarged side view showing a main part of the cassette shown in FIG. 1 when the magnetic tape is not running, with a slider in an open state.

FIG. 3 is a view corresponding to FIG. 2 showing a main part when a slider is in a closed state.

4 is a plan cross-sectional view of a main part in the state shown in FIG.

FIG. 5 is a view corresponding to FIG. 1 in a conventional tape cassette.

FIG. 6 is a view corresponding to FIG. 4 in a conventional tape cassette.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower half 11 Through hole 11a Long hole part in the front-back direction 11b Long hole part in the up-down direction 2 Brake member 3 Brake arm 31 Tip bulge part 32 Engagement protrusion 4 Magnetic tape 5 Hub 6 Slider 7 Side frame plate 71 Wedge protrusion 71a Front upper edge 9 Lid 91 Side plate

Claims (1)

[Scope of utility model registration request] 1. A brake member for preventing rotation of the hub is slidably provided in a cassette main body accommodating a pair of hubs around which a magnetic tape is wound, and the front end of the cassette main body is opened and closed. Is provided rotatably, and a slider for closing the opening of the lower surface is slidably provided on the lower surface of the cassette main body. When the slider is open, the lid is rotated to rotate the lid. In the tape cassette configured such that the front end bulging portion of the brake arm engages with the convex portion of the lid and the brake member slides to release the brake of the hub, the side frame plate of the slider is On the inner surface side, a wedge-shaped projection having an inclined upper edge portion on the front side or a lower edge portion on the front side is provided, and a long hole portion in the front-rear direction and a long hole in the vertical direction are formed on the side wall of the cassette body. Or a groove portion including a groove in the front-rear direction and a groove in the up-and-down direction, and the brake arm is provided with an engagement protrusion that is fitted into the through hole or the groove portion. In addition, when the slider is closed, the bulge of the tip of the brake arm is moved upward or downward by the wedge-shaped projection, and at that time, the engaging projection is elongated in the vertical direction of the through hole or groove. A tape cassette characterized in that it can be moved into a groove or a groove.