JP3492939B2 - Tape cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-reel type tape cartridge used in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 63-251983 discloses a one-reel type tape cartridge which is located inside a hub for winding a tape and which moves up and down to brake and release the tape reel. The lock is listed. FIG. 6 is an exploded perspective view of a conventional one-reel type tape cartridge. FIG. 7 is a sectional view of the main part. These figures are shown inverted for clarity. Cartridge is upper case 1,
One tape reel 3 around which a tape 14 is wound is rotatably housed in a main body case composed of a lower case 2.
Between the upper and lower cases 1 and 2, openings 12 and 22 of the upper and lower cases are formed to insert the leader blocks 18 drawn out by the driving member on the apparatus side. The tape reel 3 is integrally formed with a hub 32 integrally formed with a lower flange 33, and the tape reel 3 has the opening 20 of the lower case 2.
It is adapted to be rotatably driven by a drive device on the device side via the.

The hub 32 has engaging teeth on its inner surface and engages with the brake lock 5 to prevent unnecessary rotation of the tape reel 3 when not in use.

The brake lock 5 has teeth 51 on the lower surface side and engages with the engaging teeth of the hub 32. Brake lock 5
Is constantly pressed to the braking position by the brake spring 4.

The guided projection 52 of the brake lock 5 is formed with a concave portion 73 slidably fitted to the guide member 13 formed on the inner surface of the upper case 1, whereby the concave portion 73 is formed.
The brake lock 5 can be surely moved up and down between a lower brake position and an upper brake release position.

The brake release protrusion 63 is the brake lock 5
Is formed on the lower surface of the hub 32 and has a center hole 43 at the bottom of the hub 32.
When it is inserted into the device, the brake release protrusion 63 is lifted upward, and along with this, the brake lock 5 is lifted upward, the engagement with the tape reel 3 is released, and the tape reel 3 rotates. Will be able to.

The tip of the tape 14 is wound around the pin member 8. The pin member 8 is then fitted and fixed in the pin receiving recess of the leader block 18. When this cartridge is installed in the device, the locking recess 1 of the leader block 18
The leader member of the leader block 18
Is then pulled out, hung up along the tape running path of the device to the tape take-up reel, and finally held in the recess formed in the outer periphery of the take-up reel on the device side.

[0008]

In the cartridge of the above-mentioned prior art, the brake release member of the apparatus presses the brake release protrusion 63 of the brake lock 5 to raise the brake lock, so that the brake is released from the hub 32 and the brake is released. It will be canceled. If the center of the protrusion 63 and the center of the brake releasing member of the device deviate (this may be caused by the dimensional error of the product), the brake lock does not move straight upward, or the outer periphery of the brake lock 5 and the braking At times, the inclined rib 72 (FIG. 7) for centering the brake lock 5 with respect to the hub 32 is caught, and smooth brake release may not be possible.

Therefore, it is conceivable to interpose a brake release plate between the brake release member of the device and the brake lock 5 to enable more reliable brake release. However, even in that case, since the brake release plate can push up the periphery with the center of the brake release plate in contact with the brake button, the brake release plate bends and cannot be reliably released. It is an object of the present invention to provide a brake plate structure for ensuring reliable release of the brake plate.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to rotatably accommodate one tape reel wound with a tape in a case body composed of an upper case and a lower case, and a lower case for inserting a drive shaft. The tape reel has an opening of
The hub is provided with an opening at the top and a bottom at the bottom. An engagement hole for engaging a brake release plate is provided in the bottom wall of the hub. A tooth that engages with the shaft is formed, a tooth portion that engages with a brake lock is provided on the inner bottom surface of the hub, a brake release plate is provided inside the hub , and a leg portion thereof fits into the engaging hole. There is a brake lock on this, the brake teeth that engage with the teeth are on the outer peripheral side of the lower surface, the guided projection is on the upper surface side, and the guided projection is on the upper case. is guided non-rotatably in a vertically movable by provided guide projections, also between the brake lock and upper casing in the tape cartridge spring member for urging the brake lock in the braking position is provided, wherein the blanking < br /> rake release plate Communication of the legs from the main surface portion center to the bottom surface
A taper having a convex reinforcing portion connected to the joint.
It is solved by the cartridge .

Preferably , the central bottom surface of the main surface portion preferably has an annular shape at a position corresponding to the brake lock contact portion.
Jo reinforcing portions are provided, wherein the reinforcing portion is the to the legs
It is connected to the convex reinforcement.

[0012]

FIG. 1 is an exploded perspective view of a tape cartridge showing 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 upper and lower cases 1 and 2. The lower case 2 has an opening 21 through which the drive shaft of the device is inserted.
Have. Openings 12 and 22 for drawing out the tape are formed in the upper and lower cases 1 and 2. The tape reel 3 has a hub 32 in which an upper flange 31 and a lower flange 33 are integrally formed.
The metal plate 7 is integrally formed on the lower surface of the hub 32. A drive tooth portion 39 that engages with the drive shaft of the device is provided around the metal plate (the metal plate 7 is attracted to the drive shaft of the device and the tape reel 3 rotates). Since the tape is directly adhered to the outer peripheral surface of the hub with water or the like, no fixing member for fixing the tape is provided.

On the inner surface of the hub 32, there are engaging teeth 35,
The tape reel 3 engages with the brake lock 5 when not in use
Prevents unnecessary rotation of. The brake lock 5 has teeth 51 on the lower surface side and engages with the teeth 35 of the hub 32. The brake lock 5 is constantly pressed to the brake position by the brake spring 4. The guided projection 52 of the brake lock 5 can be reliably moved up and down (brake position and brake release position) by a position restricting portion (not shown) provided on the inner surface of the upper case 1.

A brake release plate 9 is interposed between the hub 32 and the brake lock 5. The brake release plate 9 includes a main surface portion 91 and a plurality of leg portions 92. The leg 92 is the hub 32
When it is installed in the device, the leg portion 92 of the brake release plate 9 is lifted up, and the brake lock 5 is lifted up accordingly to engage with the tape reel 3. When the tape reel 3 is released, the tape reel 3 can rotate.

2A and 2B are perspective views of the hub 32. FIG. 2A shows the upper surface side and FIG. 2B shows the bottom surface side. On the lower surface of the hub 32, a tooth portion 35 that engages with the brake lock 5 is formed at a position avoiding the through hole 36. Further, a concave portion 38 is connected to this central portion, and a concave groove 37 is connected between the central portion and each through hole. On the outside of the lower surface of the hub 32, there is a drive tooth portion 39 that engages with the device, and in the center portion a recess 34 in which the metal plate 7 is incorporated
Are formed.

FIG. 3 is a perspective view of the brake lock 5,
(A) shows the upper surface side, (b) shows the bottom surface side. On the lower surface side of the brake lock 5, there is a brake tooth portion 51 which engages with the tooth portion 35 of the hub 32 to prevent the tape reel 3 from rotating.
A protrusion 53 that abuts on the brake release plate 9 is formed at the center.

FIG. 4 is a perspective view of the brake release plate 9,
(A) shows the upper surface side, (b) shows the bottom surface side. The brake release plate 9 includes three legs 92 and a substantially triangular main surface portion 91. A concave portion 93 is formed at the center of the main surface portion 91. The recess 93 is a portion where the projection 53 of the brake lock 5 abuts, and is recessed to prevent the center positions of the two from deviating from each other. A first reinforcing rib 94 is formed on the back surface of the brake release plate 9 between the center portion and the leg portion 92.

5A and 5B are sectional views of the cartridge. FIG. 5A shows a brake locked state, FIG. 5B shows a brake released state, and FIG. 5C is an enlarged sectional view of an essential part. The brake release plate 9 is constantly pressed by the brake lock 5 from above. Further, when the cartridge is used, the leg portion 92 is pushed by the brake releasing member (not shown) of the device against the pressing force, and the brake releasing plate 9 moves upward, so that the center portion and the outer edge of the brake releasing plate 9 are moved. A reverse force is applied to the leg portion 92 in the section. Therefore, the first reinforcing rib 9
4 increases the strength of the brake release plate 9.

Further, a reinforcing rib 94 is provided in the groove 37 of the hub 32.
Since it enters, the position of the brake lock 5 in the height direction does not change. If the brake release plate is thick as a whole, the reinforcing effect is high, but the material cost of the brake release plate is high, the lower surface of the hub must be entirely thinned, and the strength of the hub is reduced, which is preferable. Absent. It is more effective if the connecting portion between the leg portion 92 and the main surface portion 91 is formed with a reinforcing rib 95 having a height higher than that of the reinforcing rib 94 to enhance strength. As a result, it is possible to prevent the connection portion from warping or breaking. Further, each reinforcing rib 94 may be formed in the shape of a rib 96, which is connected at its central portion in an annular shape so as not to interfere with the contact portion of the brake lock 5.

In this embodiment, the reinforcing ribs 94 to 96 are used to reinforce the space between the main surface portion 91 and the leg portion 92. However, when the brake release plate 9 is made of metal, the reinforcing ribs are formed by drawing. May be. Further, it is possible to form a large number of protrusions to form a reinforcing structure even if the structure is not continuous.

[0021]

By providing a reinforcing structure between the center of the main surface portion of the brake release plate and the leg portion, unnecessary deformation of the brake release plate is prevented, and reliable brake release operation is possible.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a hub.

FIG. 3 is a perspective view of a brake lock.

FIG. 4 is a perspective view of a brake release plate.

FIG. 5 is a cross-sectional view of the cartridge, in which (a) is not used (when braking) and (b) is when used (when brake is released).

FIG. 6 is an exploded perspective view of a conventional tape cartridge.

FIG. 7 is a sectional view of a conventional tape cartridge.

[Explanation of symbols]

1 upper case 2 lower case 3 tape reel 31 Upper flange 32 hubs 33 Lower flange 34 (Metal plate mounting) Recess 35 teeth 36 through holes 37 groove 38 recess 39 Drive tooth 4 Brake spring 5 Brake lock 51 Brake tooth 52 Guided protrusion 53 protrusions 7 metal plate 9 Brake release plate 91 main surface 92 legs 93 recess 94 Reinforcing rib 95 ribs 96 ribs

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-260033 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 23/107

Claims (3)

(57) [Claims] 1. A single tape reel wound with a tape is rotatably housed in a case body composed of an upper case and a lower case, and the lower case has an opening for inserting a drive shaft,
The tape reel includes a hub having an opening at the top and a bottom wall at the bottom. An engagement hole for engaging a brake release plate is provided in the bottom wall of the hub, and a metal is provided on an outer surface of the lower surface of the hub. A tooth for engaging a plate and a drive shaft of the device is formed, a tooth portion for engaging a brake lock is provided on an inner bottom surface of the hub, and a brake release plate has a leg portion for engaging the inside of the hub. It is mounted so that it fits into the hole, and there is a brake lock on this, the brake teeth that engage with the teeth are on the outer peripheral side of the lower surface, and the guided projection is on the upper surface side. In a tape cartridge in which a guide protrusion provided on the upper case is non-rotatably guided in a vertically movable manner, and a spring member for urging the brake lock to the brake position is provided between the brake lock and the upper case. , The above A tape cartridge, wherein the brake release plate has a convex reinforcing portion on the bottom surface thereof , which is connected to the connecting portion of the leg portion from the center of the main surface portion. 2. A tape cartridge according to claim 1, wherein the central bottom surface of the main surface portion is provided reinforcing portion at a position corresponding to the brake lock abutment portion, reinforcing portion the
A tape cartridge characterized by being connected to a convex reinforcing portion. 3. The convex reinforcing portion has an annular shape.
Or the tape cartridge according to 2 .