JPH0732782U - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] When the magnetic tape is not running, the brake member does not move even if a strong shock is applied by dropping the cassette, etc. Therefore, the hub may rotate and the magnetic tape may loosen. Providing tape cassettes without. 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 an opening of the lower surface is closed on the lower surface of the cassette main body. A slider that is slidable, and a lid that opens and closes the front end of the cassette body is rotatably provided, and the rotation of the lid causes the brake arm of the brake member to engage with the lid. In the tape cassette configured such that the brake member slides and the brake of the hub is released under the opened state of the lid, the brake arm is provided with a protrusion or a notch, and the lid is
It is characterized in that a cutout portion or a projection fitted to the projection or the cutout portion is provided in the closed state of the lid.

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. 4, a tape cassette generally has a pair of hubs 11, 11 each having a magnetic tape wound inside a cassette body consisting of an upper half 1 and a lower half (lower half is not shown). A brake member 2 which is housed in a position where the magnetic tape is not run and which is slidable in the front-rear direction of the cassette along the upper half 1 so as to prevent the hub from rotating. The hub 6 is urged in a direction to prevent rotation of the hub. The brake member 2 is provided with a pair of engaging claws 21 and 21 that can be engaged with the hubs at the positions facing the hubs, and a pair of left and right ends extending toward the front side of the cassette. The brake arms 3 and 3 are provided, and the bulging portions 32 and 32 for engagement are provided at the tips of the brake arms 3 and 3, respectively.

Further, as shown in FIGS. 4 and 5, a lid 4 for opening and closing the front end of the cassette body is provided at the front end of the upper half 1 as shown in FIGS. A pair of side plates 5 and 5 are provided at the left and right ends of the lid 4 so as to contact the outside of the brake arms 3 and 3, respectively, and the central portions of the side plates 5 and 5 are pivotally supported on the upper half 1. Therefore, the lid 4 is rotatable. Further, convex portions 52, 52 for engagement are provided at one end on the inner side of the side plates 5, 5, respectively. Further, on the lower surface (outer surface) of the lower half, as shown in FIG. 5, a slider 7 for closing the opening of the lower surface is provided so as to be slidable in the front-rear direction of the cassette. (FIG. 5 shows the slider 7 retracted to its open position.)

When the magnetic tape is not running, the lid 4 is closed and in this closed state, the lid 4 cannot rotate. That is, when the lid 4 is in the closed state, the slider 7 also slides to the closed position and a part of the slider 7 advances toward the rotation range of the lid 4. Therefore, the lid 4 is The slider 7 is so constructed that it cannot be directly rotated because its rotation is obstructed.

When the cassette is loaded into the drive, the slider 7 is first retracted by the mechanism on the drive side to the outside of the rotation range of the lid 4, as shown in FIG. 4 is rotated in the opening direction, and by this rotation, the convex portions 52, 52 are engaged with the bulging portions 32, 32 of the brake arms 3, 3, and in that state, the lid 4 When the lid 4 is further rotated, the lid 4 pulls the brake member 2 against the urging force of the spring 6 toward the front end side of the cassette, and the brake member 2 retreats toward the front end side of the cassette to move from the hub. The hubs are separated so that the brakes on the hub are released.

That is, when the magnetic tape is not running, rotation of the hub is blocked (brake) by the urging force of the spring 6 for urging the brake member 2, and the hub of the magnetic tape is stopped. When traveling, the brake is released by rotating the lid 4 against the biasing force of the spring 6. Therefore, the urging force of the spring 6 cannot be increased so much, but in normal use, it is possible to prevent the hub from rotating without any trouble when the magnetic tape is not running. .

[0007]

[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 hub rotates and the magnetic tape 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.

[0009]

[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 body, and the rotation of the lid causes the brake arm of the brake member to engage with the lid. Then, in the tape cassette configured such that the brake member slides and the brake of the hub is released when the lid is opened, the brake arm is provided with a protrusion or a notch, and the lid is Provided is a tape cassette, which is provided with a notch or a protrusion that fits into the above protrusion or the notch when the lid is closed. By, in which to achieve the above objects.

[0010]

[Action]

 According to the tape cassette of the present invention, when the magnetic tape is not running (when the lid is closed), the protrusion and the notch engage with each other, and the brake member prevents the hub from rotating. , The rearward movement of the cassette (the direction in which the brake is applied) is blocked by the hub, and the forward slide in the cassette (the direction in which the brake is released) is blocked by the lid, and the lid cannot rotate. As a result, the brake member cannot move in either of its sliding directions.

[0011]

Embodiment 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 upper half side of an embodiment of the tape cassette according to the present invention as viewed from the inside, and FIG.

As shown in FIG. 1, the tape cassette of this embodiment has a pair of hubs each having a magnetic tape wound inside a cassette body composed of an upper half 1 and a lower half (the lower half is not shown). A brake member 2 that is housed in the position indicated by the hub rings 11 and that blocks rotation of the hub is provided slidably in the front-rear direction of the cassette along the upper half 1, and when the magnetic tape is not running, The brake member 2 is biased by a spring 6 in a direction to prevent rotation of the hub. The brake member 2 is provided with a pair of engaging claws 21 and 21 that can engage with the hubs at positions facing the hubs, and a pair of left and right ends that extend toward the front side of the cassette. Brake arms 3 and 3 are provided, and bulging portions 32 and 32 for engagement that bulge outward are provided at the tips of the brake arms 3 and 3, respectively.

As shown in FIGS. 1 and 2, a lid 4 is provided at the front end of the upper half 1 to open and close the front end of the cassette body. A pair of side plates 5 and 5 are provided on the left and right ends of the lid 4 so as to contact the outside of the brake arms 3 and 3, respectively, and the central portions of the side plates 5 and 5 are pivotally supported on the upper half 1. The side plates 5 and 5 are provided with engaging protrusions 52 and 52 which are bulged inward at one end on the inner surface side of the side plates 5 and 5, respectively. On the lower surface (outer surface) of the lower half, as shown in FIG. 2, a slider 7 that closes the opening of the lower surface is provided slidably in the front-rear direction of the cassette. (Fig. 2 shows the slider 7 retracted to its open position.)

When the magnetic tape is not running, the lid 4 is in a closed state, and in this closed state, the lid 4 is not rotatable. That is, in the closed state of the lid 4, the slider 7 is also slid to the closed position and a part of the slider 7 is advanced into the rotation range of the lid 4, so that the lid 4 is moved to the closed position. The rotation of the slider 7 is obstructed so that it cannot be directly rotated unless the slider 7 is slid (retreated).

When the cassette is loaded in the drive, the slider 7 is first retracted by the mechanism on the drive side to the outside of the rotation range of the lid 4 as shown in FIG. 4 is configured to be rotated in the opening direction (clockwise in FIG. 2). By this rotation, the convex portions 52, 52 of the side plates 5, 5 of the lid 4 engage with the bulging portions 32, 32 of the brake arms 3, 3 and further rotate the lid 4 in that state. As a result, the lid 4 pulls the brake member 2 in the forward direction of the cassette against the urging force of the spring 6, and as a result, the brake member 2 is retracted toward the front end side of the cassette and moves away from the hub. It is designed to release the brake, and these points are constructed in the same way as the conventional product of this type.

Therefore, in the tape cassette of this embodiment, as shown in FIG. 2, a protrusion 31 is provided on the break arm 3 and is fitted to the lid 4 when the lid 4 is closed. A notch 51 that fits is provided.

To further explain the tape cassette of the present embodiment, as shown in FIG. 2, the cutout 51 is formed by notching the center of the lower edge of the side plate 5 of the lid 4 and in front of the cutout. The end face on the side is a vertical face. Further, the protrusion 31 is a rectangular rod-like member which is vertically erected from the upper edge of the above-mentioned brake arm 3 to the upper half 1 side, and the upper end portion thereof is slightly bent to the outside to provide a protruding portion. . Then, in the closed state of the lid 4, the side surface on the front side of the projecting portion is formed so as to contact the vertical surface of the cutout portion 51.

The cutout portion 51 and the projection 31 contact the side plate 5 when the side plate 5 is rotated 90 ° in the opening direction (clockwise in FIG. 2) to release the brake of the hub. The shape and dimensions are taken into consideration so that the protrusions 31 do not collide with each other and the slider 7 sliding in the closing direction does not collide with the protrusions 31.

In the tape cassette of the present embodiment configured as described above, when the magnetic tape is not running (when the lid 4 is closed), as shown in FIG. 2, the protrusion 31 and the notch 51 are formed. , And the brake member 2 is prevented from moving rearward of the cassette by the hub (due to the engagement of the engaging claws 21 and 21), and forward of the cassette (in the direction of releasing the brake). Is prevented by the lid 4 (due to fitting in the notch 51 of the side plate 5), and the lid 4 is in a non-rotatable state in its closed position, so that The brake member 2 is in a state in which it cannot move in either of the sliding directions when the magnetic tape is not running.

Therefore, in the tape cassette of this embodiment, when the magnetic tape is not running (when the lid 4 is in the closed state), the break member 2 may move even if a strong impact such as a drop of the cassette is applied. The rotation of the hub is prevented without fail, so that there is no risk that the hub will rotate and the magnetic tape will loosen.

FIG. 3 is a view corresponding to FIG. 2 showing a second embodiment of the tape cassette of the present invention. In the tape cassette of the second embodiment, a protrusion 51A having an inclined surface at the lower end is vertically provided above the brake arm 3 from the side plate 5 of the lid 4, and the protrusion 51A is provided above the brake arm 3. A notch 31A having a "L" shape (right and left are opposite in FIG. 3) for fitting is provided. When the protrusion 51A and the cutout portion 31A are fitted in the closed state of the lid 4, the rear side surface at the lower end portion of the protrusion 51A and the front vertical surface of the cutout portion 31A come into contact with each other. Thus, the tape cassette of the second embodiment is constructed similarly to the first embodiment except for these points. The tape cassette of the second embodiment has the same effect as that of the first embodiment, and the tape cassette of the second embodiment is similar in shape and size to the protrusion 51A and the cutout 31A. There is also the effect that there are relatively few restrictions.

It should be noted that the present invention is not limited to the above-described embodiment, and the brake arm is provided with a protrusion or a notch, and the lid is fitted to the protrusion or the notch when the lid is closed. It suffices if a notch or a protrusion is provided to match. For example, the shapes and the like of the protrusions and the notches can be appropriately determined so as not to interfere with the operation of the lid and slider.

[0023]

[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 upper 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.

FIG. 3 is a view corresponding to FIG. 2 showing a second embodiment of the tape cassette of the present invention.

FIG. 4 is a view corresponding to FIG. 1 in a conventional tape cassette.

FIG. 5 is a view corresponding to FIG. 2 in a conventional tape cassette.

[Explanation of symbols]

 1 Upper half 2 Brake member 3 Brake arm 31 Notch 4 Lid 5 Side plate 51 Protrusion 6 Spring 7 Slider

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 lid 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 the rotation of the lid causes the brake arm of the brake member to engage with the lid. In the tape cassette configured such that the brake member slides together and the brake of the hub is released under the opened state of the lid, the brake arm is provided with a protrusion or a notch, and the lid is provided with A tape cassette provided with a notch or a protrusion that fits into the protrusion or the notch when the lid is closed.