JP2001052464A - Tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assemblability without disengaging a brake releasing plate from the hub of a tape reel during assembling work of a cartridge. SOLUTION: One tape reel onto which a tape is wound is roatably housed in the inside of a casing main body, the tape reel is composed of upper and lower flanges and the hub 32 whose upper side is opened and whose lower surface is closed, the outer surface is provided with a metal plate in the center and the tooth engaging with the driving shaft of a device in the outer periphery, the through-hole 36 engaging with a brake releasing plate is provided in the lower surface of the hub 32, the engaging tooth part engaging with a brake lock is provided in the internal surface of the lower surface of the hub, the brake releasing plate is composed of the main surface part interposing between the brake lock and the internal surface of the hub 32 and plural leg parts fitting into the through-hole of the lower surface of the hub, a brake tooth part is provided in the outer peripheral side of the lower surface of the brake lock and the part abutting against the brake releasing plate is provided in central part, and the rotation of the tape reel is prevented by engaging the engaging tooth part of the hub with the brake tooth part of the brake lock.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a one-reel type tape cartridge used for a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 63-251983 discloses a tape cartridge of a one-reel type which has a brake lock which brakes and releases a tape reel by moving up and down inside a hub. Has been described.

FIG. 7 is an exploded perspective view of a conventional one-reel type tape cartridge. FIG. 8 is a sectional view of a main part. These figures are shown upside down for easy viewing. In the cartridge, one tape reel 3 around which a tape 14 is wound is rotatably housed in a main body case composed of an upper case 1 and a lower case 2. Openings for inserting a leader block 18 drawn out by a drive member on the apparatus side are formed between the upper and lower cases 1 and 2 by the openings 12 and 22 of the upper and lower cases. The tape reel 3 is integrally formed with a reel hub 32 integrally formed with a lower flange 33. The tape reel 3 is rotatably driven by a drive device on the device side through an opening of the case. The inner surface of the reel hub 32 has an engagement tooth portion that engages with the brake lock 5 to prevent unnecessary rotation of the tape reel 3 when not in use. The brake lock 5 has a tooth portion 51 on the lower surface side, and engages with the engagement tooth portion of the reel hub 32. The brake lock 5 is constantly pressed to the brake position by the reel spring 4. A recess 73 is formed in the guided projection 52 of the brake lock 5 so as to be slidably fitted to the guide member 13 formed on the inner surface of the upper case 1. It can move up and down between the position and the upper brake release position. A brake release projection 63 is formed on the lower surface of the brake lock 5 and is inserted into the center hole 43 at the bottom of the reel hub 32. When the brake release projection 63 is mounted on the device, the brake release projection 63 is lifted upward. 5 is lifted upward, the engagement with the tape reel 3 is released, and the tape reel 3 can rotate. The tip of the tape 14 is a pin member 20
Wrapped around. The pin member 20 is then fitted and fixed in the pin receiving recess of the leader block 18. When this cartridge is mounted on the apparatus, the leader block 18
The pull-out member on the device side enters the locking recess 19 of the device, grips the leader block 18, then pulls out and hangs the tape along the running path of the tape of the device to the tape take-up reel. Is held in a recess formed in the outer peripheral portion.

[0004]

In the conventional tape cartridge, the brake lock 5 is pressed downward by the reel spring 4 so that the engagement teeth of the reel and the teeth 51 of the brake lock are engaged. The rotation of the reel is prevented. The brake lock mechanism used in the tape cartridge according to the present invention has a brake release plate having three legs interposed between the reel hub and the brake lock as described later, and the brake lock is provided by a spring member. It is pressed downward to engage the engaging teeth of the reel with the teeth of the brake lock. When set on the recording / reproducing device side, the driving device on the recording / reproducing device side comes into contact with the leg provided with the brake releasing plate, and pushes up the brake releasing plate to a predetermined position to release the engagement between the reel teeth and the brake lock teeth. The reel is rotatable and the tape is pulled out. This brake release plate has only three legs of the spider inserted into three holes provided on the reel hub when assembling the tape cartridge. In some cases, a malfunction such as the inability to do so occurred.

[0005]

According to the present invention, a tape reel having a tape wound therein is rotatably housed in a case body, and the tape reel has an upper flange, a lower flange, and an upper opening and a lower opening. The hub has a closed bottom surface, a metal plate in the center on the outer surface of the lower surface of the hub, teeth on the outer periphery thereof for engaging with the drive shaft of the device, and a through hole on the lower surface of the hub for engaging a brake release plate. Is provided, and the inner surface of the lower surface of the hub has an engagement tooth portion that engages with a brake lock,
The brake release plate includes a main surface portion interposed between the brake lock and the inner surface of the hub, and a plurality of legs fitted into the through holes in the lower surface of the hub. There is a brake tooth part on the side and a contact part with the brake release plate at the center part, and the engaging tooth part of the hub and the brake tooth part of the brake lock engage to prevent rotation of the tape reel. In a tape cartridge provided with a spring member for urging the brake lock to a brake position between the brake lock and the upper case, a tip end of a leg of a brake release plate is provided through an engagement hole of a hub. It is characterized in that a protrusion for preventing the falling off is formed. Further, in the tape cartridge having the above configuration,
According to the present invention, the through hole with which the brake release plate is engaged has a taper portion for inserting the protrusion of the brake release plate leg on the inner surface side of the hub, and a concave portion capable of accommodating this protrusion on the outer surface side. It is characterized by being formed. According to the present invention,
During assembly of the cartridge, once the brake release plate is installed, the brake release plate does not come off the hub, so that the assemblability is improved. Further, a brake release plate can be pre-assembled on the tape reel.

[0006]

FIG. 1 is an exploded perspective view of a tape cartridge according to an embodiment of the present invention. In this cartridge, one tape reel 3 around which a tape is wound is rotatably housed in a main body case composed of an upper case 1 and a lower case 2. The lower case 2 has an opening 21 into which the drive shaft of the device is inserted. Notches 12 and 22 are formed in the upper and lower cases 1 and 2 to form an opening for drawing out the tape. The tape reel 3 includes a reel hub 32 integrally formed with an upper flange 31 and a lower flange 33, and a metal plate 34 integrally fixed to the lower surface of the reel hub 32. Engaging teeth (not shown) are provided around the metal plate 34 to engage with the drive shaft of the apparatus. The metal plate 34 is made of magnetic metal, is attracted by magnetic means provided on a drive shaft of the apparatus, and the tape reel 3 is rotated by the drive shaft. Tape 6
Is fixed directly to the outer peripheral surface of the hub by water or the like, and thus no fixing member for fixing the tape is provided. The inner surface of the reel hub 32 has an engagement tooth portion 35, and the brake lock 5
To prevent unnecessary rotation of the tape reel 3 when not in use. The brake lock 5 has a tooth portion 51 on the lower surface side,
It engages with the teeth 35 of the reel hub 32. The brake lock 5 is constantly pressed to the brake position by the reel spring 4. The guided protrusion 52 of the brake lock 5 can be reliably moved up and down between a brake position and a brake release position by a position regulating portion (not shown) provided on the inner surface of the upper case 1. A brake release plate 9 is interposed between the reel hub 32 and the brake lock 5.
The brake release plate 9 includes a main plate 91 and a plurality of legs 92. The leg portion 92 has penetrated into the through hole 36 on the lower surface (bottom wall) of the reel hub 32. When the leg portion 92 is mounted on the device, the leg portion 92 of the brake release plate 9 is lifted upward. To release the engagement with the tape reel 3 so that the tape reel 3 can rotate. The tip of the tape 6 is fixed to the leader member 8. The leader member 8 includes a pin member 81, C
It comprises a U-shaped clamp 82. The tape 6 is wound around a pin member 81, and is fixed by fitting a C-shaped clamp 82 from above. When mounted on the apparatus, the leader member 8 is held by the holding member of the apparatus, and the tape 6 is pulled out. The tape outlet is opened and closed by a door member 7. The door member 7 is constantly urged by a spring 10 in a direction to close the tape pull-out port.

FIG. 2 is a perspective view of the reel hub 32. On the lower surface of the reel hub 32, a tooth portion 35 that engages with the brake lock 5 is formed at a position avoiding the through hole 36. A concave portion 38 is formed in the center, and the concave portion 38 and each through hole 36 are connected by a concave groove 37.

FIG. 3 is a perspective view of the brake release plate 9 (a).
Is a bottom view, and (b) is a top view. The brake release plate 9 includes a main plate 91 and three legs 92. Main plate 9
1 has a central concave portion 28 and a concave groove 37 of the reel hub 32.
Ribs 93 and 94 are formed at the positions corresponding to. These ribs 93 and 94 are ribs for reinforcing the brake release plate 9. A projection 95 is formed on the outer surface of the distal end of each leg 92. These projections 95 serve as retaining portions from the through holes 36. As shown in FIG. 3B, a contact portion 96 for the brake lock 5 is provided at a central portion of the main plate 91. This contact portion is formed, for example, as a gentle convex portion or concave portion, and can act on a corresponding concave portion or convex portion on the lower surface of the brake lock 5 to perform centering.

FIG. 4A is a plan view in which the brake release plate 9 is incorporated in the reel hub 32, and FIG. 4B is a sectional view of a main part. The upper side of the through hole 36 of the reel hub 32 is a tapered portion 36a for facilitating the projection 95 of the brake release plate 9 to enter. In addition, a concave portion 39 is formed on the rear surface side so that the projection 95 can be accommodated when the brake release plate 9 is lifted when the tape cartridge is used. A vertical portion 37b for positioning the leg portion 92 is formed between the tapered portion 36a and the concave portion 39.

With this configuration, the brake release plate 9 is incorporated into the reel hub 32 and the leg 9
2 is pushed into the through-hole 36, the protrusion 95 elastically passes through the vertical portion 37b, and fits into the concave portion 39, and thereafter,
The brake release plate does not come off. Also, the protrusion 9
Even when the device 5 is provided, the recess 39 for accommodating the device 5 is formed, so that the protrusion does not become an obstacle in the apparatus.

FIGS. 5 and 6 show modified examples. The protrusions 95 are provided on both sides of the leg 92. Even in this case, the through hole 3
Reference numeral 6 denotes a tapered portion 36a, a vertical portion 36b, and a concave portion 39. As described above, the protrusion 95 can be provided at an arbitrary position of the leg, and various modifications are possible in the present invention.

[0012]

According to the present invention, since the brake release plate does not come off the hub when assembling the cartridge, the assemblability is improved. Also, if the brake release plate is installed in the hub in advance, it will be possible to handle it as an integral part of the brake release plate and the tape reel,
The cartridge assembling work becomes easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a tape cartridge according to an embodiment of the present invention.

FIG. 2 is a perspective view of a hub according to an embodiment of the present invention.

3A and 3B are perspective views of a brake release plate according to an embodiment of the present invention, wherein FIG. 3A shows a bottom surface and FIG.

4A is a plan view of a hub incorporating a brake release plate according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view of a main part of FIG.

FIG. 5 is a perspective view showing a modified example of the brake release plate of the present invention, wherein (a) shows a bottom surface portion and (b) shows an upper surface portion.

6A is a plan view of a hub incorporating a brake release plate in FIG. 5, and FIG. 6B is an enlarged sectional view of a main part of FIG.

FIG. 7 is an exploded perspective view of a conventional tape cartridge.

FIG. 8 is a sectional view of a main part of a conventional tape cartridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Tape reel 4 Reel spring 5 Brake lock 9 Brake release plate 31 Upper flange 32 Reel hub 33 Lower flange 34 Metal plate 35 Teeth 36 Through hole 36a Tapered portion 36b Vertical portion 37 Recessed groove 38 Central recess 39 Recess 51 Brake Tooth 52 Guided Protrusion 91 Main Plate 92 Leg 93 Reinforcement Rib 94 Reinforcement Rib 95 Projection

Claims (2)

[Claims] 1. A tape reel having a tape wound therein is rotatably accommodated in a case main body. The tape reel includes an upper flange, a lower flange, and a hub having an upper opening and a lower opening. A through hole is provided on the lower surface of the hub for engaging a brake release plate, and an engagement tooth portion for engaging with a brake lock is provided on the inner surface of the lower surface of the hub. The brake lock comprises a main surface portion interposed between the inner surface of the hub and a plurality of legs fitted into the through holes in the lower surface of the hub, and a brake tooth portion is provided on an outer peripheral side of a lower surface of the brake lock, in a central portion. The portion has a contact portion with a brake release plate, and the engagement teeth of the hub and the brake teeth of the brake lock engage to prevent rotation of the tape reel. Between upper case In a tape cartridge provided with a spring member for urging the brake lock to a brake position, a protrusion is formed at a tip end of a leg of a brake release plate to prevent the brake release plate from coming off from an engagement hole of a hub. Tape cartridge. 2. The tape cartridge according to claim 1, wherein the through hole with which the brake release plate is engaged has a tapered portion for inserting a protrusion of a brake release plate leg on the inner surface side of the hub, and the outer surface side. A tape cartridge formed with a recess capable of accommodating the protrusion.