JPH0719876U - 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 lid for slidably providing a brake member for locking rotation of the hub in a cassette main body accommodating a pair of hubs around which magnetic tape is wound, and a lid for opening and closing the front end of the cassette main body. When the lid is rotated, the tip of the brake arm of the brake member is pulled toward the front end of the cassette to slide the brake member, and when the lid is opened, the hub is opened. In a tape cassette configured to be unlocked, the tip of the brake arm is rotatably locked to a side plate of the lid, and the brake arm is operated following the operation of the lid. It is characterized by doing so.

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 has a pair of magnetic tapes wound at a position indicated by hub rings 11 and 11 in a cassette body composed of an upper half 1 and a lower half (lower half is not shown). A brake member 3 for accommodating each hub and for preventing rotation of the hub is provided slidably along the upper half 1 in the front-rear direction of the cassette, and when the magnetic tape is not running, the brake member 3 is a spring. It is designed to be urged in the direction to prevent rotation of the hub by 8. The brake member 3 is provided with a pair of engaging claws 31, 31 that can engage with the hubs at the positions facing the hubs. The left and right ends extend toward the front end of the cassette. A pair of brake arms 4 and 4 are provided, and bulging portions 43 and 43 for engagement are provided at the tips of the brake arms 4 and 4, respectively.

Further, as shown in FIGS. 5 and 6, a lid 5 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 6 and 6 are provided at the left and right ends of the lid 5 so as to be substantially in contact with the outside of the brake arms 4 and 4, respectively. The lid 5 is pivotally supported and is rotatable. Further, engaging projections 62, 62 are provided on the inner end portions of the side plates 6, 6, respectively. Further, on the lower surface (outer surface) of the lower half 2, as shown in FIG. 6, a slider 9 for closing the opening portion of the lower surface is provided so as to be slidable in the front-rear direction of the cassette. (FIG. 6 shows the slider 9 retracted to its open position.)

The lid 5 is closed when the magnetic tape is not running, and the lid 5 is not rotatable in this closed state. That is, in the closed state of the lid 5, the slider 9 also slides to the closed position, and part of the slider 9 has advanced into the rotation range of the lid 5, so that the lid 5 is moved to the slider. It is configured so that its rotation cannot be directly rotated because the rotation is hindered by 9.

When the cassette is loaded into the drive, the slider 9 is first retracted by the drive side mechanism to the outside of the rotation range of the lid 5 as shown in FIG. The lid 5 is adapted to be rotated in the opening direction (clockwise), and by this rotation, the convex portions 62, 62 are engaged with the bulging portions 43, 43 of the brake arms 4, 4, When the lid 5 is further rotated in this state, the lid 5 pulls the brake member 3 against the biasing force of the spring 8 toward the front end side of the cassette, so that the brake member 3 is removed from the hub. It retreats away, so that the hub is unlocked (the hub brake is released).

That is, the hub is prevented from rotating (locked) by the urging force of the spring 8 for urging the brake member 3 when the magnetic tape is not traveling, and when the magnetic tape is traveling. In the above, the lid 5 is rotated against the biasing force of the spring 8 so that the locked state is released and the lid 5 is unlocked. Therefore, although the biasing force of the spring 8 cannot be increased so much, it is possible to keep the hub in the locked state without any trouble when the magnetic tape is not running under normal use.

[0007]

[Problems to be solved by the device]

 However, when a strong impact is applied to the tape cassette, such as when the tape cassette is accidentally dropped, the brake member 3 may move. If the brake member 3 moves, the hub may rotate 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 locks the rotation of the hub is slidably provided in a cassette body that accommodates a pair of hubs around which a magnetic tape is wound, and the front end portion of the cassette body is opened and closed. The lid is rotatably provided, and by the rotation of the lid, the tip of the brake arm of the brake member is pulled toward the front end side of the cassette, the brake member slides, and the lid is opened. At this time, in the tape cassette configured so that the hub is unlocked, the end of the brake arm is rotatably locked to the side plate of the lid, and the brake arm is moved to operate the lid. The above object is achieved by providing a tape cassette characterized in that the tape cassette is made to operate following it.

[0010]

[Action]

 In the tape cassette of the present invention, the brake arm cannot perform any movement other than the rotation around the locking position of the tip of the brake arm on the side plate of the lid, and the magnetic tape does not run. Since the lid is not rotatable when the magnetic tape is not running, the brake member keeps the hub rotation locked when the magnetic tape is not running. It is impossible to slide in the direction of.

Further, the brake member is configured such that the tip end of the brake arm is rotatably locked to the side plate of the lid and the brake arm operates following the operation of the lid. Therefore, when the lid rotates, the brake member slides by being pulled toward the front end of the cassette, and when the magnetic tape is running (when the lid is open), the hub is unlocked and is rotatable. It

[0012]

【Example】

 An embodiment of the tape cassette of the present invention will be described below with reference to the drawings. 1 is a side view showing an essential part of an embodiment of the tape cassette of the present invention when the hub is in a locked state, and FIG. 2 is an enlarged side view showing a part A of the brake member shown in FIG. FIG. 3 is a side view showing a main part of the tape cassette shown in FIG. 1 when the hub is unlocked.

As shown in FIG. 1, the tape cassette of this embodiment accommodates a pair of hubs 7 and 7 around which a magnetic tape is wound in a cassette body composed of an upper half 1 and a lower half 2 (see FIG. A brake member 3 for preventing rotation of the hubs 7, 7 is provided slidably in the front-rear direction of the cassette (left-right direction in FIG. 1). The brake member 3 is provided with a pair of engaging claws 31, 31 that can engage with the hubs 7, 7 at positions facing the hubs 7, 7, and the front and rear ends of the cassette are provided at both left and right ends. There is provided a pair of brake arms 4 and 4 extending to the side (only one of which is shown in FIG. 1).

As shown in FIG. 1, a lid 5 is provided at the front end of the upper half 1 to open and close the front end of the cassette body by rotation. A pair of side plates 6 and 6 are provided at both left and right ends of the lid 5 so as to contact the outsides of the brake arms 4 and 4, respectively, and the central portions 63 and 63 of the side plates 6 and 6 are arranged on the upper half 1. It is pivotally supported and rotatable. Further, on the lower surface (outer surface) of the lower half 2, a slider 9 for closing the opening of the lower surface is provided slidably in the front-rear direction of the cassette.

When the magnetic tape is not running, as shown in FIG. 1, the lid 5 is in a closed state, and the lid 5 is not rotatable under the closed state. That is, in the closed state of the lid 5, the slider 9 also slides to the closed position, and a part of the slider 9 has advanced into the rotation range of the lid 5. The rotation of the slider 9 is obstructed so that the slider 9 cannot be directly rotated unless the slider 9 is slid (retracted).

When the cassette is loaded in the drive, the slider 9 is first retracted to the outside of the rotation range (open position) of the lid 5 by the mechanism on the drive side, as shown in FIG. In this state, the lid 5 can be rotated in the opening direction, 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 FIGS. 1 and 3, the tip ends of the brake arms 4 and 4 are rotatably attached to the side plates 6 and 6 of the lid 5 described above. While stopping, the brake arms 4 and 4 are operated following the operation of the lid 5.

The tape cassette according to the present embodiment will be further described. As shown in FIGS. 1 and 3, the side plate 6 of the lid 5 is provided with a circular hole 61, and the tip of the brake arm 4 is provided with the circular hole 61. On the side facing the side plate 6 (outer surface side of the cassette), a short columnar shaft body 41 fitted in the hole 61 is provided in a protruding manner.

Further, as shown in FIG. 3, the brake arm 4 is provided from the lower part of the brake member main body so as to be substantially horizontal (parallel to the sliding direction of the brake member 3) when the hub 7 is unlocked. As shown in FIG. 2, the base portion 42 of the brake arm 4 is formed by cutting out the upper side of the base portion 42 to make it slightly thin, and when the lid 5 is rotated, the tip end side of the brake arm 4 can be rotated. So as a hinge.

In the tape cassette of this embodiment configured as described above, the brake member 3 cannot perform any movement other than the rotation around the hole 61 in the side plate 6 of the lid 5, In addition, since the lid 5 is in the non-rotatable state when the magnetic tape is not running (when the lid 5 is closed), the brake member 3 is, as shown in FIG. At times, it is impossible to slide the hub 7 in either the front or rear direction while keeping the rotation locked.

Therefore, in the tape cassette of this embodiment, when the magnetic tape is not running (when the lid 5 is closed), the break member 3 may move even if a strong shock is applied due to the cassette falling or the like. Therefore, the rotation of the hub 7 is reliably prevented, and therefore, there is no possibility that the hub 7 rotates and the magnetic tape loosens.

In the brake member 3, the shaft 41 at the tip of the brake arm 4 is locked in the hole 61 in the side plate 6 of the lid 5, and the brake arm 4 is connected to the shaft 41. Since the hinge 5 and the hinge 42 follow the operation of the lid 5, the rotation of the lid 5 pulls the shaft 41 toward the front end portion of the cassette to slide the brake member 3, and FIG. As shown, when the magnetic tape is running (when the lid 5 is open), the hub 7 is unlocked and is rotatable. At that time, the brake member 3 cannot move except rotation of the tip end of the brake arm 4 about the shaft body 41. Therefore, there is no risk of sliding, and the hub 7 is locked. There is no danger of becoming.

FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment of the tape cassette of the present invention. The tape cassette of the second embodiment differs from that of the first embodiment in that the brake arm 4A is braked so that it is substantially horizontal (parallel to the sliding direction of the brake member 3) when the hub 7 is locked. The tape cassette of the second embodiment has the same structure as that of the first embodiment except that it is provided from the upper portion of the member main body.

In the tape cassette of the second embodiment, the same effect as that of the first embodiment can be obtained. In addition to that, in the second embodiment, the brake arm 4A is moved in the sliding direction of the brake member 3. Since it is provided substantially in parallel with the above, there is an effect that the brake member 3 is less likely to move in the sliding direction when the hub 7 is locked.

It should be noted that the present invention is not limited to the above-described embodiment, and the tip of the brake arm is rotatably locked to the side plate of the lid, and the brake arm is attached to the lid. It suffices if it is made to operate following the operation of.

For example, the side plate portion of the lid that locks the tip of the brake arm may be a recess provided on the inner surface of the side plate instead of the through hole as in the above embodiment. Further, the root part of the brake arm does not have to be a hinge as in the above-mentioned embodiment, and for example, the brake arm is an independent member, and its tip and root are respectively attached to the side plate and the brake member body. It may be locked by a structure similar to the locking structure of the tip in the above embodiment. Further, the tape cassette of the present invention may have a built-in spring for urging the brake member in the direction to prevent rotation of the hub, and other changes may be made without departing from the spirit of the present invention. It is possible.

[0027]

[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 side view showing an essential part of a tape cassette according to an embodiment of the present invention when a hub is locked.

FIG. 2 is an enlarged side view showing a portion A of the brake member shown in FIG.

FIG. 3 is a side view showing a main part of the tape cassette shown in FIG. 1 in a case where a hub is unlocked.

FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment of the tape cassette of the present invention.

FIG. 5 is a plan view of the upper half side of a conventional tape cassette as viewed from the inside.

FIG. 6 is a view corresponding to FIG. 1 in a conventional tape cassette (however, the slider is slid to an open position).

[Explanation of symbols]

 1 Upper half 2 Lower half 3 Brake member 4 Brake arm 5 Lid 6 Side plate 7 Hub 9 Slider

Claims (2)

[Scope of utility model registration request] 1. A brake member for locking the 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. The lid is rotatably installed,
By the rotation of the lid, the tip of the brake arm of the brake member is pulled toward the front end of the cassette, the brake member slides, and the hub is unlocked when the lid is opened. In the tape cassette configured as described above, the front end of the brake arm is rotatably locked to the side plate of the lid, and the brake arm is operated following the operation of the lid. Tape cassette to do. 2. The tape cassette according to claim 1, wherein a root portion of the brake arm of the brake member is a hinge.