JPH0447810Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a tape cartridge characterized by a reel brake means that applies rotational braking to the tape reel inside the main body case when not in use.

[Conventional technology]

As a basic conventional technology regarding this type of reel brake means, for example, as shown in FIG.
Single stopper 1 with 0,20 connected from the front end
6 is attached so as to be slidable back and forth, and the stopper 16 is always urged to slide toward the front brake position by a spring means 25. When not in use, the left and right engaging claws 2 of the stopper 16 are in the brake position.
0 and 20 abut and engage with the left and right tape reels 3A and 3B, respectively, to prevent both tape reels 3A and 3B from rotating. When the tape cartridge is loaded into the player, the brake release member on the player side comes into contact with the stopper 16, and the stopper 1
6 is slid backward to the rear brake release position, whereby both the engaging claws 20, 20 are disengaged from the tape reels 3A, 3B, respectively, and the tape reels 3A, 3B are placed in a freely rotating state. be.

In this conventional configuration, only a single stopper 16 and a single spring means 25 are required, and the number of components is small, making assembly easy. In addition, since the stopper 16 is slidably displaced in a linear manner, the moving area of the stopper 16 can be reduced, and a large installation space is not required, which has the advantage of being able to respond well to downsizing of tape cartridges.

However, there was a problem in that the brake was applied only to one of the left and right tape reels 3A and 3B, resulting in a one-handed situation. That is, not only when the tape cartridge is shipped from the factory, but also during use by the user, the tape 2 is wound onto the supply side tape reel 3A of the left and right tape reels 3A and 3B, and the tape 2 is wound onto the other take-up side tape reel 3B. is often empty. In such a case, if the supply side tape reel 3A, which has a large mass, moves backward due to an external impact, the stopper 16
is pushed in the brake release direction against the spring means 25, and the light take-up side tape reel 3B remains in the same position, the brake is released and it is allowed to rotate in the tape payout direction a, and the tape 2 is moved to the front of the case. This causes the phenomenon of loosening. This is because the tape end is slightly wound on the take-up side tape reel 3B as well.

Further, a similar phenomenon occurs when the supply tape reel 3A receives an external force that causes it to rotate in the tape feeding direction b. For example, even when the tape 2 is pulled toward the front of the case during tape inspection prior to factory shipment, torque acts preferentially on the supply side tape reel 3A, which has a larger winding diameter, due to the tape tension, and the tape reel 3A It rotates in the tape feeding direction b.

If the tape 2 comes loose toward the front of the case, it may cause deformation or flaws in the tape 2, and if the case has a front cover 9 as shown in the figure, the opening and closing operation of the front cover 9 will be impaired.

Therefore, an improved conventional reel brake means is disclosed in Japanese Utility Model Application No. 173083/1983. As shown in FIG. 6, a pair of reel stoppers 16A and 16B, which are divided symmetrically in the main body case 1, are arranged slidably between a front brake position and a rear brake release position. However, it is provided with spring means 25 for pressing and biasing the left and right stoppers 16A, 16B individually to the forward braking position, and the rest of the structure is basically the same as that of the conventional example.

According to this, the supply side tape reel 3A in which the tape 2 is fully wound moves due to inertia due to external force,
Supply side stopper 16A that abuts and engages with this
Even when the tape reel 3B is pushed back in the brake release direction against the spring means 25, the other take-up stopper 16B, which is in abutting engagement with the take-up tape reel 3B, maintains the braking position without sliding displacement. do. This is intended to prevent the tape 2 from being fed out to the front of the case from the take-up tape reel 3B and causing tape slack.

[Problem that the invention attempts to solve]

However, in the brake means shown in the above-mentioned Japanese Utility Model Publication No. 58-173083, the left and right stoppers 16A, 1
6B are arranged adjacent to each other in sliding contact with each other, and the brakes are released by directly operating the respective release operation parts 22, 22 with a brake release member on the player side. For this reason, when one of the left and right stoppers 16A, 16B slides in the brake release direction, the other stopper also moves in conjunction with this, resulting in a problem in which the brake remains in a one-handed state. For example, tape loosening occurs when large impacts or kinetic forces in the longitudinal direction are repeatedly applied to the tape cartridge.

This kind of malfunction occurs when the left and right stoppers 16A,
The biggest factor is that the release operation parts 22, 22 of 16B are always in surface contact and are linked at this contact surface. Furthermore, in order to make it more compact, the left and right stoppers 16
It is desirable that A and 16B be placed as close as possible. In addition, in order to simplify the structure, it is desirable that the brake release member on the player side be a single brake release member that can be operated in conjunction with the brakes of both tape reels 3A and 3B. Although the conventional example has been adopted to meet these demands, it can be said that there are difficulties in the means for achieving it.

[Purpose of invention]

From this point of view, the present invention basically follows the form of the conventional example shown in FIG. 6, and further develops and improves it to solve the problems of the conventional example.

The specific purpose of the present invention is to simplify the structure and improve assembly workability by reducing the number of constituent members of the reel brake means as much as possible, and to obtain one that ensures compact installation space. It is in.

Another object of the present invention is that a pair of left and right stoppers 16A, 16B constituting the reel brake means operate independently, and both tape reels 3A, 3
The purpose is to ensure that the movement of one side of B does not have an adverse effect on the other side, thereby reliably preventing the tape from becoming loose.

Still another object of the present invention is to
The purpose is to enable the rotational brakes A and 3B to be smoothly released by a single brake release member 23 on the player side.

[Means for solving problems]

That is, the present invention is constructed as follows in order to achieve the above object.

First of all, tape reels 3A and 3B, on which the tape 2 is wound, are rotatably mounted on the left and right sides of the main body case 1. More specifically, each tape reel 3A, 3B has engagement teeth 12 continuously formed on the outer periphery of a lower flange 11.

Second, it is required that the main body case 1 be provided with a pair of left and right stoppers 16A, 16B corresponding to the left and right tape reels 3A, 3B, respectively. It is most preferable that these stoppers 16A, 16B be arranged by effectively utilizing the dead space existing at the rear central part of the main body case 1 as shown in the illustrated example, but they can also be arranged at the front central part.

Thirdly, each of the left and right stoppers 16A, 16B has a brake position where the stoppers 16A, 16B engage with the corresponding tape reels 3A, 3B in a non-rotating manner, and a brake release position where the stoppers 16A, 16B are disengaged from the tape reels 3A, 3B. They must be arranged in parallel so that they can slide forward and backward independently of each other. It is noted here that the left and right stoppers 16A and 16B can normally slide in the front and back direction without contacting and interfering with each other, and are arranged in parallel on the left and right so as not to take up more installation space than necessary. be done.

Fourthly, it is required that spring means 25 be provided to press and bias each of the left and right stoppers 16A, 16B individually toward the brake position. The spring means 25 only needs to press and bias each stopper 16A, 16B individually. For example, a spring piece can be extended in a cantilever manner from each stopper 16A, 16B, and the extending end of the spring piece can be connected to the main body. It may be received and supported by a wall member on the case 1 side.

Fifth, the winding-side stopper 16B corresponding to the winding-side tape reel 3B is required to have a release operation portion 22B with which the brake release member 23 on the player side comes into contact. In other words, the brake release member 23 on the player side is the stopper 1 on the winding side.
The winding side stopper 16B can be slid in the brake release direction by contacting only the release operation portion 22B of the brake lever 6B.

Sixthly, the supply side stopper 16A corresponding to the supply side tape reel 3A has a front and rear release operation section 22B.
It is required to have a release operation part 22A that is arranged oppositely on the brake release direction side and that is pushed and moved in the brake release direction by the front and rear release operation parts 22B when the brake is released. Therefore, when the supply stopper 16A slides independently between the brake position and the brake release position, it does not interfere with the take-up stopper 16B.

[Effect]

To explain the operation of the reel brake means using the illustrated example, when normally not in use, the stoppers 16A, 16
B is pressed to the brake position in front of the case by a spring means 25, and the respective engaging claws 20, 2
0 is the engagement tooth 12, 12 of the tape reel 3A, 3B
The brake maintains a position in which it abuts and engages the brake. A supply tape reel 3 on which the tape 2 is wound by an external force acting on the main body case 1.
When a kinetic inertia force is applied to A to move it rearward or to rotate it in the tape feeding direction b, the supply side stopper 16A that is abutted and engaged with it resists the spring means 25 and releases the rear brake. being pushed back in the direction. At this time, the supply side stopper 16
A is the normal braking position and the tape reel 3A
is slidably displaced between the rear sliding limit until it is received and supported by the movement regulating wall 27 of the main body case 1,
In this standard sliding area, the supply tape reel 3
The brake state of A is still maintained.

However, since the winding side stopper 16B is arranged so as to be out of the standard sliding area of the supply stopper 16A, the winding side stopper 16B is not moved backward by the supply side stopper 16A, and the winding side stopper 16B is not moved backward by the supply side stopper 16A. The stopper 16B still maintains the normal braking state even when the tape is idly wound.

When loading the tape cartridge into the player,
As shown in FIG. 4, the brake release member 23 on the player side comes into contact only with the release operation part 22B of the winding-side stopper 16B through the release hole 24 formed in the bottom wall 4 of the case, and the stopper 16B is moved by the spring means. 25 toward the rear brake release position. Then, the release operation section 22B at the rear end of the winding-side stopper 16B is connected to the release operation section 22B at the rear end of the supply-side stopper 16A, which is located rearward.
2A, the supply stopper 16A moves in the brake release direction together with the take-up stopper 16B, and the rotational brakes of both tape reels 3A and 3B are reliably released.

[Effect of idea]

According to the present invention as described above, a pair of left and right stoppers 16A, 16B are arranged in parallel in close proximity, and a separate spring means 25 is provided to press and bias each stopper 16A, 16B to the brake position. , it has the advantage of having a simple structure with a small number of parts and requiring a small installation space.

Nevertheless, each stopper 16A on the left and right,
16B operates independently, and even if the supply stopper 16A is slid in the unlocking direction due to the free movement of the supply tape reel 3A, which has a large mass and usually winds up the tape 2, the stopper 16B operates independently. 16A, the take-up side stopper 16B is not moved at the same time, and the take-up side stopper 16B brings the take-up side tape reel 3B, in which the tape 2 is not wound (or close to an empty state), into a normal braking state. can continue to be maintained. Therefore, even when a large impact or a movement force in the longitudinal direction is repeatedly applied to the tape cartridge, the left and right tape reels 3A and 3B can be independently and reliably held in the brake state by the respective stoppers 16A and 16B. . This reliably prevents the tape from loosening toward the front of the case due to large movement of one of the tape reels 3A, 3B.

Further, when the tape cartridge is loaded into the player, the brake release member on the player side is applied to the take-up stopper 16B which is in contact with the take-up tape reel 3B where the tape 2 is almost empty or in a nearly empty state. 23, the supply side stopper 16A also slides in the brake release direction in conjunction with the sliding of the stopper 16B in the brake release direction. Both tape reels 3A,
It has the advantage of being able to easily and reliably release the 3B brake.

[Embodiment 1] Figures 1 to 4 show a first embodiment in which the present invention is applied to a small video tape cartridge (tape width: 8 mm).

The main body case 1 of this device is formed by joining upper and lower plastic cases 1a and 1b with their lids interlocked. Tape reels 3A and 3B, on which the tape 2 is wound, are rotatably mounted on the left and right sides of the interior of the main body case 1, and are positioned over respective drive shaft insertion holes formed through the bottom wall 4 of the case. The main body case 1 has tape guide members 6, 6 on the front left and right sides. The tape 2 is unwound from the supply tape reel 3A on the right side of the figure to the front of the case via these guide members 6, 6, and is wound onto the other take-up tape reel 3B.

A pocket 7 is recessed in the front surface of the main body case 1, and a front lid 9 is pivotably mounted on the front surface of the main body case 1 so as to be openable and closed. When not in use, the front cover 9 covers and protects the outer front surface of the tape 2 located between the guide members 6, 6, and when the tape cartridge is loaded into the player, the front cover 9 opens upward and the tape 2 is inserted into the pocket 7 from below. The tape 2 enters a standby state in which it can be pulled out to the front of the case by the inserted tape loading pin on the player side. 9a is the front lid 9
The camera back opens and closes in conjunction with the camera back.

Each tape reel 3A, 3B has flanges 1 on the top and bottom.
0 and 11, and engagement teeth 12 are continuously formed on the outer periphery of each lower flange 11. The rotation centers of the tape reels 3A and 3B are pressed downward.

In FIGS. 1 and 2, a reel brake means is incorporated in the rear left and right center portion of the main body case 1. As shown in FIG. In other words, a pair of plastic stoppers 16A and 16B are arranged in parallel on the left and right sides of each other in close proximity to each other on the inner surface of the case bottom wall 4 at the corresponding location, and guides 17 and 17 are provided upright from the case bottom wall 4.
The stoppers 16A and 16B are slidably mounted in the front and rear directions while being guided by the upper case 1a, and the lifting of the stoppers 16A and 16B is restricted by a presser rib 18 that is vertically disposed from the inner surface of the upper case 1a, as shown in FIG. Each stopper 16A, 16B has a left-right symmetrical shape and is formed by integrally molding a main body sliding part 19 that is F-shaped in plan view and an engaging pawl 20 extending from its front end. Each brake is individually biased toward the front brake position. Each engaging claw 20, 20 is attached to a corresponding tape reel 3.
It is bent so as to be oriented toward the A and 3B sides, and when not in use, each tip claw portion 20a engages with the engagement tooth 12 by its own elastic force.

In order to prevent the left and right stoppers 16A, 16B from moving together, the supply side stopper 16A corresponding to the supply side tape reel 3A is positioned toward the rear of the case, and both stoppers 16A, 16B
The images were placed shifted back and forth. In other words, with the supply side stopper 16A as a reference, the forward advancing position when this is in the braking position, and the tape reel 3A.
When the standard sliding area is between the retraction limit position when the case is pushed back to the rear due to the free movement of the case,
A take-up stopper 16B corresponding to the take-up tape reel 3B is arranged at a position outside this standard sliding area. In this state, the left and right stopper 16A,
16B, the release operation parts 22A and 22B formed at the rear ends of the main body sliding parts 19 and 19, respectively, are located at positions shifted back and forth with a small interval apart, and protrude toward the other side. In other words, both stoppers 16A and 16B are arranged separately in a non-contact manner in the front and rear sliding regions in the braking position.

When loading the tape cartridge into the player,
As shown in FIG. 4, the brake release member 23 on the player side enters the case through a release hole 24 formed through the bottom wall 4 of the lower case 1b. At this time, the brake release member 23 first comes into contact with the release operation portion 22B of the winding-side stopper 16B and pushes the stopper 16B toward the rear brake release position. Next, the release operation section 22B of the winding-side stopper 16B located at the front is connected to the release operation section 22A of the supply-side stopper 16A located at the rear.
The stopper 16A on the supply side is moved in the unlocking direction along with the stopper 16B on the winding side.

As shown in FIG. 3, the spring means 25 is a stamped product made from a thin metal plate such as a phosphor bronze plate or a stainless steel plate, and a spring arm 25b extends from a mounting base 25a in correspondence with each release operation part 22A, 22B. ,25
b are extended in parallel toward the front of the case.
Then, the mounting base 25b is fixed to the ceiling surface of the upper case 1a, and each spring arm 25b is connected to each release operation section 22.
By making pressure contact with the rear surfaces of A and 22B,
Each stopper 16A, 16B is independently pressed and biased to a forward braking position. In this way, when the spring means 25 is fixed to the ceiling surface of the upper case 1a, even if the sliding displacement amount is different between the left and right stoppers 16A, 16B, the spring arm 25b
By making the width and length of the left and right sides different,
The force for maintaining the brake state of both stoppers 16A and 16B can be made equal on the left and right sides. Also, spring arm 2
The displacement of 5b also makes it possible to set a large stroke.

In the figure, reference numeral 27 denotes a movement regulating wall that abuts and restricts the movement of the tape reels 3A, 3B within a certain range.

[Another example]

The spring means 25 may be a linear spring other than a leaf spring. Furthermore, the main body sliding portion 19 does not necessarily have to have a frame structure such as a F-shape or a U-shape.
For example, it may have a block shape similar to the conventional example.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a plan view of the main part showing details of the reel brake means, and FIG. 2 is a plan view showing the internal structure of the tape cartridge. 3 are exploded perspective views of essential parts, and FIG. 4 is a sectional view taken along the line A--A in FIG. 2. FIG. 5 is a plan view of the main part corresponding to FIG. 1, showing a basic conventional example, and FIG. 6 showing another improved conventional example. 1...Body case, 2...Tape, 3A, 3B
... Tape reel, 16A, 16B ... Stopper, 19 ... Main body sliding part, 20 ... Engagement claw, 22
A, 22B... Release operation section, 23... Brake release member, 25... Spring means.

Claims (1)

[Scope of Claim for Utility Model Registration] Tape reels 3A and 3B on which the tape 2 is wound are rotatably installed inside the main body case 1 on the left and right sides, and each of the left and right tape reels 3A,
A pair of left and right stoppers 1 corresponding to 3B respectively
Each of the left and right stoppers 16A, 16B has a brake position where it abuts and engages the corresponding tape reel 3A, 3B in a non-rotating manner, and the tape reel 3
A and 3B are disposed in parallel so as to be able to slide forward and backward across the brake release position where the abutting engagement is released, and springs that press and bias the left and right stoppers 16A and 16B individually toward the brake position. The take-up side stopper 16B corresponding to the take-up side tape reel 3B has a release operation part 22B with which the brake release member 23 on the player side comes into contact; The supply side stopper 16A corresponding to the reel 3A has a release operation section 22A that is arranged opposite to the brake release direction side of the release operation section 22B and is pushed and moved in the brake release direction by the release operation section 22B when the brake is released. A tape cartridge characterized by: