JP3066381U - Tape deck brake device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a brake device for a tape deck, a load applied to a tape or a brake shoe is reduced by automatically causing a slip function to act, and the life of the tape or the brake shoe is extended. SOLUTION: A first for transmitting a drive to a tape reel base 2 is provided.
, A second driven gear 5 for transmitting drive to the tape reel base 2 via a clutch mechanism 9, and a brake shoe 10 for applying a brake to the second driven gear 5. By operating the brake shoe 10 when stopping the tape feeding, the second driven gear 5 is driven.
Brake on The braking force is transmitted to the tape reel base 2 via the clutch mechanism 9. Clutch mechanism 9
, The load on the tape is reduced, and the tape is prevented from being damaged.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a brake device for stopping a tape in a tape deck, and more particularly to a brake device for stopping a tape in a fast-forward or rewind state in a video tape deck or the like.

[0002]

[Prior art]

 Conventionally, in a tape deck, the tape does not slack when shifting from the FF (fast forward) / REW (rewind) mode to the stop mode, and when shifting from the FWD (playback) / REC (recording) mode to the stop mode. In this way, brakes are applied to the tape reel base. To this end, the drive gear is removed from the tape reel base gear to free the reel base and apply the brake. As this type of brake device, there is known a brake device in which a brake member made of a brake pad or the like is pressed against a tape supply reel table and a rewind reel table to apply braking (for example, Japanese Utility Model Laid-Open No. 2-113835; See Japanese Patent Publication No. Hei 4-22418).

[0003]

[Problems to be solved by the invention]

 However, in the above-described conventional tape deck brake device, especially when the tape in a high-speed running state is stopped instantaneously, the load applied to the tape and the load applied to the brake shoe increase, and they are easily damaged. In addition, their life was shortened. In addition, there is a problem that image noise increases when the tape sags due to stress applied to the tape.

The present invention has been made to solve the above problem, and particularly, when stopping a tape in a high-speed running state, a slip function is automatically operated to reduce a load on the tape or brake shoe. It is another object of the present invention to provide a tape deck brake device capable of prolonging the service life of the tape deck and preventing the tape from sagging and suppressing the occurrence of image noise.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a tape deck brake device for stopping a tape in a feeding state, wherein a first driven gear for transmitting drive to a tape reel stand is different from the first driven gear. A second driven gear used in the operation mode and transmitting drive to the tape reel base via a clutch mechanism, and a brake shoe for applying a brake to the second driven gear.

In the configuration of the present invention, the tape driven reel is driven by driving the first driven gear or the second driven gear in accordance with the operation mode, and the tape is fed from the state where the tape is fed. When the vehicle is stopped, the brake is applied to the second driven gear by operating the brake shoe. The resulting braking force is transmitted to the tape reel base via the clutch mechanism. The cushioning action of the clutch mechanism at this time reduces the load on the tape and prevents the tape and brake shoes from being damaged. In addition, tape slack does not occur, which leads to reduction of image noise.

In the above description, the first driven gear is for FF (fast forward) or REW (rewind), the second driven gear is for reproduction or recording, and the brake shoes are on the supply side and the winding side. It is provided on each tape reel base, and it is desirable that both be braked almost simultaneously. Thus, when the tape is stopped from the mode in which the tape is running at a high speed, the clutch function is sufficiently exhibited, and the above-described operation is remarkably obtained.

Further, the brake shoe may apply a brake to an outer peripheral portion of the second driven gear. Thus, a relatively large braking force can be applied to the second driven gear only by applying a relatively small force to the brake shoe.

[0009] The clutch mechanism may include a disc-shaped part integral with the tape reel base or the first driven gear, and a coaxial fitting with the axis of the tape reel base, and a clutch mechanism opposing the disc-shaped part. 2) a disk-shaped part integral with the driven gear, a friction member inserted between the two disk-shaped parts, and an urging means for urging the respective disk-shaped parts to press each other via the friction member. What should be done. In this configuration, a structure in which the friction member and the urging means are arranged coaxially with the axis of the tape reel base can be easily adopted, so that the clutch mechanism can be configured in a relatively compact form.

[0010]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a brake device portion of a tape deck, FIG. 2 is an enlarged view of a part thereof, and FIG. 3 is a cross-sectional view of the same. A tape supply reel base 2 (hereinafter referred to as a supply reel base) and a tape take-up reel base 3 (hereinafter referred to as a take-up reel base) are arranged on a chassis 1 of the tape deck. Each of the take-up reel tables 3 is provided with a first driven gear 4 and a second driven gear 5 to which a drive from a drive system (not shown) is transmitted according to an operation mode. When the tape cassette is loaded in the tape deck, the shaft portions 2a and 3a projecting from the upper surfaces of the reel bases 2 and 3 are fitted into the holes 6a of the reel 6 (FIG. 3) of the tape cassette. Can be sent.

Each of the supply reel base 2 and the take-up reel base 3 is provided with a first driven gear 4 and a second driven gear 5 for driving each reel base. 2 and 3 show the supply reel table 2 side, which will be described below. The take-up reel table 3 also has basically the same configuration. The first driven gear 4 is provided integrally with the reel base, and the second driven gear 5 is provided below the first driven gear 4 via the clutch mechanism 9 coaxially with the axis of the reel base. . The first driven gear 4 meshes with the drive gear 7 when the tape is in REW (rewind) mode or in FF (fast-forward) mode, and directly transmits the driving force to the reel base. I have. The drive gear 8 meshes with the second driven gear 5 in each of the reproduction, recording, and cue modes, and indirectly transmits the driving force to the reel base. One of the driving gears 7 and 8 selectively meshes with one of the driven gears 4 and 5 of the supply reel table 2 or the take-up reel table 3 depending on the operation mode.

As shown in FIG. 3, the clutch mechanism 9 is fitted coaxially with the disk-shaped portion 2b of the reel base 2 or the first driven gear 4 and the shaft 2a of the reel base 2, and A disc-shaped portion 9b integrated with the second driven gear 5 disposed to face the lower side, a friction member 9a inserted between the two disc-shaped portions 2b, 9b, and the disc-shaped portions 2b, 9b are formed. And a spring 9c (biasing means) for biasing the friction members 9a to press each other.

The brake device is provided on each of the supply reel table 2 and the take-up reel table 3, and applies a brake to the second driven gear 5 to indirectly brake each reel table via the clutch mechanism 9. Is to be applied. The brake device controls a brake shoe 10 that can abut on the outer peripheral surface of the second driven gear 5, a brake lever 11 that holds the brake shoe 10, a spring 12 that applies a braking force, and a braking operation. It comprises an arm 15 and a mode switching lever 17. The brake shoe 10 is covered with a pad. The brake lever 11 is rotatably supported around a shaft 13, and a pin 15 a erected on one end of the arm 15 is engaged with a concave portion 11 a on an end opposite to one end where the spring 12 is mounted. ing. The arm 15 is rotatably supported around a shaft 19, and the pin 15b on the other end is engaged with the cam surface of the mode switching lever 17, so that the operation of the mode switching lever 17 controls the braking operation. Has become. Although the structure of the brake device on the take-up reel base 3 side is slightly different from that on the supply reel base 2 side shown in FIG. 2, it is basically the same, and the description is omitted.

Next, the operation of the brake device configured as described above will be described. When the first driven gear 4 or the second driven gear 5 is driven according to the operation mode of the tape deck, the supply reel table 2 or the take-up reel table 3 is driven, and the tape is fed. From this state, when the tape feeding is stopped, the mode switching lever 17 is slid in response to the rotation of the rotary cam (not shown), and the arm 15 is moved by the cam surface of the lever 17 via the pin 15b. Then, the brake lever 11 is turned in the brake operating direction against the force of the spring 12. As a result, the brake shoe 10 presses the outer peripheral portion of the second driven gear 5 to apply a brake. The braking force is transmitted to the reel base 2 or 3 via the clutch mechanism 9. The brake is applied to both the supply reel base 2 and the take-up reel base 3 substantially simultaneously. The cushioning action of the clutch mechanism 9 at this time reduces the load on the tape and prevents the tape and the brake shoes 10 from being damaged. At the same time, the tape does not sag, which is effective in reducing image noise. In particular, when the tape is stopped from the mode in which the tape is running at a high speed, the clutch function is sufficiently exhibited, and the above-described effects are remarkably obtained.

The brake shoe 10 applies a brake to the outer peripheral portion of the second driven gear 5, so that a relatively small force is applied to the brake shoe 10 and the brake shoe 10 is compared with the second driven gear 5. It can give a very large braking force.

Further, by employing the above-described configuration of the clutch device 9, a structure in which the friction member 9a and the spring 9c are arranged coaxially with the axes of the reel bases 2 and 3 can be easily adopted, and the clutch 9 can be easily adopted. The mechanism can be configured in a relatively compact form.

The present invention is not limited to the configuration of the above embodiment, and various modifications are possible. For example, the brake shoe 10 does not have a configuration in which it comes into contact with the outer peripheral portion of the second driven gear 5 at the time of braking. It may be in contact with the shape portion 9b.

[0018]

[Effect of the invention]

 As described above, according to the tape deck brake device of the present invention, the braking force generated by applying a brake to the second driven gear by operating the brake shoe is transmitted to the tape reel base via the clutch mechanism. The cushioning effect of the clutch mechanism reduces the load on the tape, prevents damage to the tape and brake shoe, extends the life of the tape, and reduces the occurrence of tape slack and reduces image noise.

The first driven gear is for FF (fast-forward) and REW (rewind), and the second driven gear is for reproduction and recording. By simultaneously applying the brakes to the second driven gear, when the tape is stopped from the mode in which the tape is running at a high speed, the clutch function is sufficiently exerted, and the above-mentioned effects are remarkably obtained.

In addition, since the brake shoe applies a brake to the outer peripheral portion of the second driven gear, a relatively large braking force is applied to the second driven gear only by applying a relatively small force to the brake shoe. Can be given.

Further, the clutch mechanism includes a disk-shaped portion of a first driven gear integrally formed on a tape reel base, and a disk of a second driven gear disposed to face the lower side of the disk-shaped portion. Parts, a friction member inserted between them, and an urging means for urging each disc-shaped part to press each other through the friction member, so that the whole components are coaxially arranged. By adopting the above structure, it is possible to configure a relatively compact form.

[Brief description of the drawings]

FIG. 1 is a plan view of a brake device of a tape deck according to an embodiment of the present invention.

FIG. 2 is a plan view of a brake device portion on a supply reel base side.

FIG. 3 is a side sectional view of the same part.

[Explanation of symbols]

 2 Tape supply reel base 2b Disc-shaped part 3 Tape take-up reel base 4 First driven gear 5 Second driven gear 9 Clutch mechanism 9a Friction member 9b Disk-shaped part 9c Spring (biasing means) 10 Brake shoe 11 Brake lever 12 Brake force Spring to apply

Claims (4)

[Utility model registration claims] 1. A tape deck brake device for stopping a tape in a feeding state, wherein a first driven gear for transmitting drive to a tape reel base and an operation mode different from the first driven gear are used. A brake device for a tape deck, comprising: a second driven gear that transmits drive to a tape reel base via a clutch mechanism; and a brake shoe that brakes the second driven gear. 2. The first driven gear is for FF (fast forward) or REW (rewind), the second driven gear is for reproduction or recording, and the brake shoe is on a supply side and a winding side. The brake device for a tape deck according to claim 1, wherein the brake device is provided on each of the tape reel tables on the side, and a brake is applied to both of them substantially simultaneously. 3. The tape deck brake device according to claim 1, wherein the brake shoe applies a brake to an outer peripheral portion of the second driven gear. 4. The clutch mechanism includes a disc-shaped part integral with the tape reel base or the first driven gear, and a second part coaxially fitted with an axis of the tape reel base and disposed opposite to the disc-shaped part. A disc-shaped part integral with the driven gear, a friction member inserted between the two disc-shaped parts, and urging means for urging the disc-shaped parts to press each other via the friction member. The brake device for a tape deck according to claim 1 or 2, wherein: