JP2607432Y2 - Brake device for tape recorder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive tape recorder brake device having a simple structure.

[0002]

2. Description of the Related Art In a tape recorder, when setting a stop mode from each of the reproduction, rewind, and fast-forward modes, it is desirable that the tape travel be stopped immediately upon pressing of a stop button. However, since the gears for running the tape are rotated at a high speed, even if the stop button is pressed to turn off the current to the drive motor that rotationally drives these gears,
The gears keep rotating for a while due to inertia. Also, in the fast forward and rewind modes, the tape also runs at high speed, so even if the drive mode is set to stop mode and the driving force to the reel base is removed, the reel base itself rotates for a while with the tape due to the inertia of the tape. to continue.

[0003] For this reason, conventionally, there has been proposed a brake device for immediately stopping the tape running. Such a braking device includes a mechanical device and an electric device. Of these, the mechanical brake device has a rotation stop near the tape reel reel stand. When the stop button is operated, the rotation stop comes into contact with the reel stand to stop the rotation. In addition, the electric brake device is configured to momentarily stop the drive motor by inputting a current in a direction to reversely rotate the drive motor instantaneously when the stop button is operated.

[0004]

By the way, in a general tape recorder, various parts are arranged between a reel base and a stop button. In the conventional mechanical brake device, since the rotation stop portion is arranged near the reel base, in order to operate the rotation stop portion by operating the stop button, the above various parts must be avoided. The operation mechanism was complicated, and a large number of parts had to be used.

Further, in the electric brake device, a control system is complicated, for example, a sensor for detecting that a stop button has been pressed must be provided, and it is necessary to use a reversible drive motor.

[0006] Therefore, conventionally, there is a problem that the cost is high irrespective of whether it is a mechanical brake device or an electric brake device, and there is a problem that it is difficult to apply to an inexpensive tape recorder. For this reason, there is a tape recorder which is inexpensive without providing a brake in the rotating system. However, this has a problem that the tape does not stop at a fixed position and goes excessively, especially at the time of fast forward or rewind.

The present invention solves the above-described problems, and has a simple structure, can reduce the cost, and can stop the magnetic tape at a fixed position. It is an object of the present invention to provide a brake device.

[0008]

In order to solve the above-mentioned problems, the present invention provides a brake device of a tape recorder having a stop lever for stopping each operation of a mechanism, the moving direction of the stop lever. A moving means which is reciprocally movable in a direction intersecting with the moving means and which is released from a locked state for holding the above operations by operating the stop lever, and is returned to a predetermined position by an elastic member; and When the stop lever is operated, the abutting portion of the stop lever and the inclined portion of the moving means move the moving means, and the locked state of the moving means is released. The moving means is returned to the predetermined position by the elastic force of the elastic member, and the brake means is moved between the tape winding reel and the reel driving means. In contact with the rotary member which is interposed, it is characterized in that the rotation of the reels so as to stop.

[0009]

As shown in FIG. 1, the engagement portion 50A of the brake portion 50 provided on the lock lever 28 in the stop mode.
However, they are urged by the tension spring 34 toward the intermediate gear 14 and mesh with each other. As a result, a braking force acts on the intermediate gear 14 and the respective gears and reels 11 and 12 connected thereto.

Here, when the reproduction lever 21 is operated,
As shown in FIG. 2, the lock lever 28 moves to the left by X,
The engagement portion 50A is separated from the intermediate gear 14. Thus, the braking force acting on each part is released, and the regeneration processing is performed.

When the stop lever 22 is operated in the reproduction mode, the lock lever 28 temporarily moves to the left as shown in FIG. 3, and then returns to the stopped position as shown in FIG. . When the stop lever 22 is further depressed, the lock between the vertical protruding piece 27 of the stop lever 22 and the inclined portion 40 of the lock lever 28 is released as shown in FIG. 5, and the lock lever 28 is in the stop mode shown in FIG. Return to When the operation force of the stop lever 22 is removed, the state returns to the stop mode. Thereby, a braking force acts on each part.

According to this brake device, the structure is simple, the number of parts can be reduced, and the cost can be reduced because a complicated control system and a reversible motor are not required. Further, since the brake can be reliably applied, the magnetic tape can be stopped at a fixed position.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a tape recorder according to an embodiment of the present invention;

FIG. 1 shows a rotary drive system of a tape recorder to which the present invention is applied. In addition, the position of each part in the drawing may be different from the actual one for convenience of explanation. By the way, as shown in FIG.
1 and a rewind reel 12 are rotatably arranged at appropriate intervals, and each reel 11, 12 is provided with gears 11A, 12A on the same central axis. These reels 1
An idler gear 13 is movably arranged between 1 and 12.

The idler gear 13 revolves around the intermediate gear 14 while meshing therewith. Forward reel 1
The direction change gear 15 is meshed with the first gear 11A. Thereby, the rotation directions of the forward reel 11 and the rewind reel 12 are opposite to each other. Intermediate gear 1
A drive gear 16 meshes with 4, and a pulley 17 is attached to the drive gear 16. A belt 20 is hung on the pulley 19 of the motor 18 and the pulley 17 of the drive gear 16. Thereby, the rotational force of the motor 18 is transmitted to each of the reels 11 and 12.

In the normal reproduction mode or the fast-forward mode, the idler gear 13 moves toward the forward reel 11, and the idler gear 13 meshes with the gear 11A of the forward reel 11 via the direction change gear 15. As a result, the rotational force of the motor 18 is transmitted to the gear 11A, and the forward reel 11 rotates clockwise in the drawing.

In the reverse mode or the rewind mode, the idler gear 13 moves toward the rewind reel 12 and meshes with the gear 12A. As a result, the rotational force of the motor 18 is transmitted to the gear 12A, and the rewind reel 12 rotates counterclockwise.

In the tape recorder, the various modes described above are set by lever operation. In this example, for convenience of explanation, the playback lever 21
And the stop lever 22 are shown, but a rewind lever and a fast forward lever are also provided. The reproduction lever 21 is used to set a reproduction mode, and the stop lever 2
2 is for setting a stop mode. Each of the levers 21 and 22 is long in the vertical direction in the figure, and by operating these, parts (not shown) for mode setting are operated.

Each of the levers 21 and 22 is supported by a guide portion 23 fixed to a chassis (not shown) so as to be movable only in the vertical direction, and furthermore, a compression spring 24, It is biased downward at 25. Stoppers 41 and 42 are provided at the upper ends of the levers 21 and 22 so as to be able to abut the guide portion 23, thereby restricting the downward movement of the levers 21 and 22 by the compression springs 24 and 25. ing.

A plate-like lock lever 28 is disposed on the back side of each of the levers 21 and 22. This lock lever 2
8 are provided with horizontally long guide grooves 29, 30 on which guide pins 31, 32 fixed to the chassis are provided.
Is inserted. This allows the lock lever 28 to move only in the lateral direction.

The lock lever 28 is urged rightward in the figure by a tension spring 34 attached to the chassis. A brake portion 50 protrudes from an upper side of the lock lever 28, and an engagement portion 50A is provided at an upper end thereof.
The meshing portion 50A can mesh with the above-mentioned intermediate gear 14,
In the stop mode, the engaging portion 50A is pressed against the intermediate gear 14 and meshes with the intermediate gear 14 by the urging force of the tension spring 34 acting on the lock lever 28. That is, the braking force acts on the forward reel 11 or the rewind reel 12 in accordance with the intermediate gear 14, the respective gears 11A, 12A, 13, 15, 16 and the state before the stop mode is set.

The lock lever 28 has a rectangular left opening 35 facing the reproduction lever 21.
A protrusion 36 is provided on the left side of the left opening 35, and a lower side thereof is an inclined surface 37. The amount of depression below the protrusion 36 is larger than the amount of depression above the protrusion 36 by the dimension X. At the time of the stop mode, the horizontal protruding piece 26 facing downward with respect to the paper surface provided at the intermediate portion of the reproduction lever 21 is inserted so as to come into contact with the base of the lower concave portion of the protruding portion 36.

The lock lever 28 has a right opening 38 in the shape of a right triangle so as to face the stop lever 22. A projecting portion 39 is provided on the oblique side of the right opening 38, and an inclined portion 40 having an appropriate angle is provided by raising the tip of the projecting portion upwardly with respect to the paper surface. This inclined part 4
There is a gap between the front end of the stop lever 22 and the stop lever 22 so that the stop lever 22 does not collide with the inclined portion 40 when the stop lever 22 moves up and down as described later. In the stop mode, the stop lever 2
2 is a vertical protruding piece directed downward with respect to the paper surface provided at an intermediate portion of
7 is arranged below the inclined portion 40.

In this tape recorder, in the stop mode, the lock lever 28 is pulled rightward by the urging force of the tension spring 34 as described above, and the meshing portion 50A of the brake portion 50 I agree. Therefore, a braking force acts on each gear connected to the intermediate gear 14 and the forward reel 11 or the reverse reel 12.

Here, when the reproduction lever 21 is pushed up to set the reproduction mode, the horizontal projection 2 of the reproduction lever 21 is pushed.
6 rises while contacting the inclined surface 37 of the left opening 35.
As a result, the lock lever 28 moves to the left against the urging force of the tension spring 34, and
When it is located above, the locking between the lateral protrusion 26 and the protrusion 36 is released, and the lock lever 28 moves to the right by the urging force of the tension spring 34. Then, as shown in FIG. 2, the lock lever 28 stops in a state where the horizontal projecting piece 26 has entered the upper concave portion of the projecting portion 36.

At this time, the lock lever 28 is shifted to the left by X compared to the stop mode, so that the brake 5
The zero tooth portion 50A is separated from the intermediate gear 14. Therefore, the braking force acting on each gear and the reels 11 and 12 is released, and each part becomes rotatable. Also,
The inclined portion 40 of the right opening 38 moves to the left, and is disposed immediately above the vertical projecting piece 27 of the stop lever 22. In this state, the reproduction mode is set and the reproduction process is performed. Even when the fast forward mode or the rewind mode is set, the lock lever 28 stops at the position where the lock lever 28 has moved to the left by X in the same manner as in the reproduction mode, and the braking force of each part is released.

When the stop lever 22 is depressed to set the stop mode from the operating state of FIG. 2, the vertical protruding piece 27 of the stop lever 22 moves up while contacting the inclined portion 40. As a result, the lock lever 28 moves to the left. Then, as shown in FIG.
When the second vertical projection 27 comes to the right end of the inclined portion 40, the tip of the projection 36 of the left opening 35 is located at a position separated from the horizontal projection 26 of the reproduction lever 21.

At this time, as shown in FIG.
1 is moved downward by the urging force of the compression spring 24,
The reproduction lever 21 stops at the position where 1 contacts the guide portion 23. As a result, the reproduction mode is released, and the mode becomes the stop mode.

When the stop lever 22 is further depressed from the state shown in FIG. 4, the stop lever 22 is pushed as shown in FIG.
The vertical protruding piece 27 rises away from the inclined portion 40 of the right opening 38. At this time, the lock lever 28 is pulled by the tension spring 34.
As shown in FIG. 1, the engagement portion 50A of the brake portion 50 is pressed against the intermediate gear 14 to engage with the intermediate gear 14 as shown in FIG. Thus, the intermediate gear 14, the gears 13, 15, 16 connected to the intermediate gear 14, and the forward reel 1
A braking force acts on 1 or the rewind reel 12.
Thereafter, when the operation force of the stop lever 22 is removed, the stop lever 22 returns to the stop mode by the urging force of the compression spring 25.

In this tape recorder, when the stop lever 22 is depressed, a braking effect works, and a reliable braking effect can be achieved. Then, the magnetic tape can be stopped at a fixed position. Further, in this tape recorder, it is only necessary to provide the brake unit 50 on the lock lever that moves in accordance with the operation of the stop lever 22 without providing a special brake device as in the related art.
The structure is simple and it can be manufactured at low cost.

In the above-described embodiment, a case has been described in which the intermediate gear 14 is engaged with the engagement portion 50A of the brake unit 50 to apply a brake. It is also possible to apply a brake by engaging the engagement portion 50A with the gear interposed between the gears 16.

Also, as shown in FIG.
It is also possible to apply a brake by providing a locking portion 50B on the brake portion 50 and locking it to the intermediate gear 14 or another gear. In addition, a gear having a large friction coefficient such as a felt may be used in place of the locking portion 50A as the locking means to stop the rotation of the gear.

[0033]

As described above, the present invention relates to a tape recorder brake device having a stop lever for stopping each operation of a mechanism, wherein a moving means interlocked with the stop lever, and a moving means integrated with the moving means. A brake means is provided, and when the stop lever is operated, the brake means comes into contact with the rotating body interposed between the tape winding reel and the reel driving means so that the rotation of the reel is stopped. It was done.

Therefore, according to the present invention, the structure can be simplified, the number of parts can be reduced, and the cost can be reduced because a complicated control system and a reversible motor are not required. When the stop lever is operated, the moving means returns to the predetermined position by the elastic force of the elastic member, and at the same time, the brake means comes into contact with the rotating body of the reel drive mechanism to stop the rotation of the reel. For example, at the time of pushing, the braking effect is immediately activated, a reliable braking effect can be achieved, and the magnetic tape can be stopped at a fixed position.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a drive system of a tape recorder to which a brake device for a tape recorder according to the present invention is applied.

FIG. 2 is a diagram illustrating a state during operation of the embodiment.

FIG. 3 shows a state in which the stop lever 22 is being operated (1/1).
It is a figure which shows 3).

FIG. 4 shows a state in which the stop lever 22 is being operated (2 /
It is a figure which shows 3).

FIG. 5 shows a state in which the stop lever 22 is being operated (3 /
It is a figure which shows 3).

FIG. 6 is a view showing another embodiment of the brake unit 50.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Forward reel 12 Rewind reel 13 Idler gear 14 Intermediate gear 15 Direction conversion gear 16 Drive gear 18 Motor 21 Reproduction lever 22 Stop lever 28 Lock lever 50 Brake part 50A Meshing part 50B Lock part

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 63-195632 (JP, U) Japanese Utility Model 63-2233 (JP, U) Japanese Utility Model 4-2-334 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A brake device for a tape recorder having a stop lever for stopping each operation of a mechanism, wherein the brake device is reciprocally movable in a direction intersecting a moving direction of the stop lever, and is operated by operating the stop lever. Moving means for releasing a locked state for holding each operation and returning to a predetermined position by an elastic member; and brake means integrally formed with the moving means. When the stop lever is operated, the stop lever is actuated. The moving means is moved by the contact between the abutting part of the moving means and the inclined part of the moving means, the locked state of the moving means is released, and the moving means returns to the predetermined position by the elastic force of the elastic member. At the same time, the brake means comes into contact with a rotating body interposed between the tape winding reel and the reel driving means, so that the rotation of the reel stops. A brake device for a tape recorder, wherein 2. The tape recorder brake device according to claim 1, wherein said rotating body and said brake means are gears that can mesh with each other. 3. The tape recorder brake device according to claim 1, wherein said rotating body is a gear, and said brake means is a locking portion which can be locked to said gear.