JPH0450578Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fast-forward/rewind mechanism for a tape recorder that performs fast-forward and rewind operations on a tape.

[Prior art]

Conventionally, as in Japanese Utility Model Application Publication No. 56-46064, an inverted T-shaped swinging member is swingably supported by an inverted T-shaped sliding member, and both ends of the swinging member are provided with a fast-forward operating lever and a rewind operating lever, respectively. A pin is provided at the center tip of the swinging member, and the pin is held between a U-shaped spring provided at the other end of the arm that supports the idler, and is supported by a fixed shaft. A fast-forwarding/rewinding mechanism configured such that when the arm is rotated by a fast-forwarding/rewinding operating lever via a swinging member, an idler meshes with a gear on a capstan shaft and a gear on a supply reel stand or a gear on a take-up reel stand. Return mechanisms are known.

In the above mechanism, the gap between the fast-forward operation lever and the rewind operation lever becomes wide, requiring a large space. In addition, several separate members are required to hold the swinging member in a neutral state, and the number of parts is large. There are drawbacks such as a complicated structure.

[Purpose of invention]

In view of the above drawbacks, the present invention has a small number of parts,
It is an object of the present invention to propose a fast forward/rewind mechanism for a tape recorder, etc., which has a simple structure, has a narrow gap between operating levers, and can be miniaturized.

[Structure of the idea]

The present invention has an idler supported on one end of an arm that transmits the drive of a motor to a gear on a supply reel stand and a gear on a take-up reel stand, and the other end of the arm is swingably supported on a fixed shaft. At the same time, the one end is formed with an inclined surface, which is sandwiched between elastic pieces on both sides of the U-shaped recess of the operating rod, which is selectively swung during fast forwarding and rewinding operations. The reason is that the state is maintained.

〔Example〕

Hereinafter, the present invention will be explained using an auto-reversing tape recorder as an embodiment shown in the drawings. The fast-forwarding and rewinding mechanism of a tape recorder is shown in FIGS. 1 to 4, in which chassis 1 and 2 are held in parallel with a support 10 at an interval, and another chassis 11 is placed below chassis 2.
are held in parallel at intervals. A motor 12 is fixed to the lower side of the chassis 11.
The rotation of the motor 12 is transmitted via a belt 17 to flywheels 15 and 16 of two capstan shafts 13 and 14 supported by the chassis 1 and 11. Gears 18 and 19 are fixed above the flywheels 15 and 16, respectively, and the capstan shafts 13 and
A supply reel stand 20 and a take-up reel stand 21 are fitted to shafts fixed to the chassis 2 on the front side of the chassis 14, respectively. Supply reel stand 20 and take-up reel stand 2
Gears 22 and 23 are fixed to 1, respectively.

As shown in FIGS. 1 and 4, the capstan shaft 1
3, 14, supply reel stand 20, and take-up reel stand 21
Two idlers 24 and 25 with a friction mechanism installed between them are connected to a shaft 26 at one end 3a of the arm 3.
The other end of the arm 3 is supported on a shaft 27 held by chassis 1 and 2. Slanted surfaces 3b and 3c are formed on both sides of one end 3a of the arm 3. On the front side of the arm 3, the middle of an operating rod 4 made of synthetic resin is rotatably supported on a fixed shaft 28, and one end of the operating rod 4 is formed with a U-shaped recess, and elastic pieces 4a and 4b on both sides support the above-mentioned Both sides of one end 3a of the arm 3 are sandwiched. The other end of the operating rod 4 is provided with arms 4c and 4d having inclined surfaces on both sides, and the arm 4c is a protrusion of a rewind operation lever 5 supported vertically to the planes of the chassis 1 and 2 so as to be movable up and down. It is faced so as to be pushed and rotated by the lower side of 5a. Similarly, the other arm 4d is pushed and rotated by the lower side of the protrusion 6a of the fast-forward operation lever 6, which is supported by the chassis 1 and 2 so as to be movable up and down.

The rewind operation lever 5 and the fast forward operation lever 6
have substantially the same shape as shown in FIG.
b and the plurality of bent portions 7a of the locking plate 7 are in contact with the inclined surfaces 5c, 6c and the stepped portion 5 in which the bent portions 7a are engaged.
d and 6d are formed, and the lower end is urged upward by a spring plate 29. The locking plate 7 is a spring 30 shown in FIG.
is biased to the right.

The stop operation lever 8, which releases the engagement between the stepped portions 5d and 6d of the operation levers 5 and 6 and the bent portion 7a of the locking plate 7, has a retaining arm 8a and an inclined surface on which the bent portion 7a abuts. 8b is formed.

The operation of the fast forward rewind mechanism of the tape recorder is such that when the rewind operation lever 5 is pushed in, one bent portion 7a of the locking plate 7 is engaged with the stepped portion 5d, and the lever 5
The arm 4c having the inclined surface of the operating rod 4 is pushed by the protrusion 5a, and the operating rod 4 is rotated counterclockwise as indicated by the two-dot chain line in FIG. The arm 3 is rotated clockwise by pushing the inclined surface 3c. With this rotation, the idler 24 meshes with the gear 18 of the left capstan shaft 13,
The idler 25 is meshed with the gear 22 of the supply reel stand 20 so that the rotation of the motor 12 is controlled by the supply reel stand 20.
0 as a clockwise rotation. When the stop operation lever 8 is pushed in, the locking plate 7 is pushed to the left in FIG. Will be reinstated.

Next, when the fast-forward operating lever 6 is pushed in, the protrusion 6a of the lever 6 engages the arm 4 having the inclined surface of the operating rod 4.
d is pushed, and the operating rod 4 is rotated clockwise in FIG. 1, and the left elastic piece 4a pushes the inclined surface 3b of one end 3a of the arm 3, and the arm 3 is rotated counterclockwise. . With this rotation, the idler 24 is meshed with the gear 19 of the right capstan shaft 14, and the idler 25 is meshed with the gear 23 of the take-up reel stand 21, so that the rotation of the motor 12 causes the take-up reel stand 21 to rotate counterclockwise. It is transmitted as

When the rewind operating lever 5 and the fast forward operating lever 6 are not pushed in, one end 3a of the arm 3 is in the U-shaped recess of the operating rod 4, and the elastic pieces 4a and 4 on both sides are in contact with each other.
In this state, the operating rod 4 is held in a neutral state in which it does not rotate left or right.

When the fast forward/rewind mechanism of a tape recorder is constructed as described above, the number of parts is reduced, and the rewind operation lever 5 and the fast forward operation lever 6 can be placed close to each other, making it possible to combine them into a small space. .

Moreover, arm 3 and idler 2 can be assembled with fewer parts.
5 and the operating rod 25 can automatically return to the neutral position, and the next mode setting operation can be performed quickly. Furthermore, since it can be configured with fewer parts, it is possible to save power on power batteries, reduce the weight of the tape recorder, and reduce costs.

In the above description, the operating rod 4 is made of a synthetic resin material, but it is made of a metal plate, and the elastic pieces are used as two opposing bent pieces to utilize the elasticity of the metal plate, and the arm with the inclined surface also has a bent part. It may be formed by

Further, in the above description, the tape recorder is an auto-reverse type tape recorder, but the present invention may also be implemented in a tape recorder or a video tape recorder that does not auto-reverse.

[Effect of idea]

Since the present invention is constructed as described above, the construction is simple, the number of parts is small, assembly is easy, and the distance between the operating levers can be narrowed, saving space and reducing the size. ,
Moreover, it is possible to provide a fast forward/rewind mechanism for a tape recorder that has excellent practical effects such as being able to automatically return the idler to the neutral position with a small number of parts.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the main parts of a tape recorder with the upper chassis removed; FIG. 2 is a plan view of the tape recorder as viewed from above the upper chassis; FIG. 3 4 is a front view of the tape recorder, and FIG. 4 is a right side view of the tape recorder. 3... Arm, 3b, 3c... Inclined surface, 4...
Operating rod, 4a, 4b...elastic piece, 12...motor, 20...supply reel stand, 21...take-up reel stand, 22, 23...gear, 24, 25...idler, 27...fixed shaft .

Claims (1)

[Scope of utility model registration request] An idler for transmitting motor drive to the gears of the supply reel stand and the gears of the take-up reel stand is supported on one end of an arm, and the other end of the arm is swingably supported on a fixed shaft. is formed by an inclined surface, and is held between elastic pieces on both sides of a U-shaped recess of an operating rod that is selectively swung during fast forwarding and rewinding operations, and after the biasing force of the operating rod is released, the idler is maintained in a neutral state. A fast forward/rewind mechanism for a tape recorder, characterized in that the tape recorder has a fast forward/rewind mechanism.