JPS5919963Y2 - Tape recorder switching device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switching device for a tape recorder, in which a head substrate provided with a magnetic head and a pinch roller is connected to a first, second, third
By switching to the three positions, each state of stop, fast forward or rewind, recording or playback can be obtained, and in each state, the magnetic head and tape can be brought into contact and separated, the capstan shaft and the pinch roller can be brought into contact and separated, and rotation can be performed. The contact pulley and drive pulley can be switched between contact and separation.

Conventionally, in order to obtain each state of stop, fast forward or rewind, recording or playback by switching the head board to the first, second and third positions, the contact pulley can be rotated. It is attached to one end of a movable plate that is supported so as to be able to slide freely, and its rolling pulley is biased by a spring toward the drive pulley, and the rolling pulley is separated from the driving pulley in response to the sliding movement of the head board. An oscillating repulley mechanism has been used which releases the locking means and switches the rotary pulley to be positioned between the supply reel or the take-up reel depending on the direction of rotation of the drive pulley.

However, in the above-mentioned oscillating repulley mechanism, a movable plate having a rotary pulley is supported so as to be able to slide freely on a guide pin embedded in a base material, and the oscillating repulley mechanism is caused to oscillate around the guide pin. When the rotary pulley is wedged between the drive pulley and the supply reel or the take-up reel, the guide pin is located in the long hole provided in the movable plate, and the movable plate is moved around the guide pin. It had the disadvantage that it had to be assembled in a swinging state, requiring a high level of accuracy for each member and for assembly.

The present invention eliminates these conventional drawbacks,
To provide a switching device for a tape recorder that can reliably fit a rotary pulley between a drive pulley and a supply reel or a take-up reel even if the accuracy and assembly precision of each member is slightly rough. .

An embodiment in which the present invention is applied to a cassette type tape recorder will be described below with reference to the drawings.

In the figure, 1 is a substrate, 2 is a head substrate, and the substrate 1
In contrast, it is configured to be able to slide only in the Y-Y' forward direction, and to take the first, second, and third positions.

Reference numeral 3 denotes a cassette half, which is positioned in the XX' forward direction and the YY' forward direction by inserting positioning holes 3a, 3a into guide pins 1a, 1a set up on the substrate 1.

3b is a tape stored in the cassette half 3.

Reference numeral 4 denotes a capstan shaft rotatably supported by the substrate 1.

Reference numerals 5 and 6 designate a recording head and an erasing head, which are fixed to the head substrate 2 and do not touch the tape 3b when the head substrate 2 is in the first and second positions, but contact the tape 3b when the head substrate 2 is in the third position. configured to make contact.

Reference numeral 7 denotes a pinch roller arm, which is rotatably supported by an arm shaft 1b on which the substrate 1 is mounted, and is configured to assume first, second, and third positions in response to the head substrate 2. has been done.

A pinch roller 8 is rotatably supported by the pinch roller arm 7. When the head substrate 2 is in the first and second positions, it is separated from the capstan shaft 4 and the head substrate 2 is in the first and second positions. It is configured so that it can come into contact with the capstan shaft 4 when it is in position 3.

9 is a take-up reel, which is rotatably supported by the base plate 1;
By rotating in the L9 direction in the figure, the tape 3b is made to run in the X direction.

10 is a supply reel, which is rotatably supported by the base plate 1, and R
By rotating in the 1o direction, the tape 3b is made to travel in the X' forward direction.

Reference numeral 11 denotes a drive pulley that applies rotational force to the take-up reel 9 and the supply reel 10, and is rotatably supported by the base plate 1.

Reference numeral 12 denotes a rolling pulley, which is always biased in the Y' direction by a spring to be described later, and is also biased in the Y-Y' direction by the head board 2.
The forward position is restricted.

That is, Fig. 4 a, l), and c represent the head substrate 1.
14 is a movable plate that is swingably arranged on the substrate 1, 15 is a shaft fixed to the movable plate 14, and 16 is a fer 1 to . 14 a is a pin provided at the rear end of the movable plate 14 , and 17 is engaged at its center with the pin 14 a of the movable plate 14 , and its both ends are suspended between pins 18 and 18 implanted on the substrate 1 . The movable plate 14 is always
2a is a substantially trapezoidal through hole provided at the tip of the head substrate 2, and 2b is a groove formed between the through hole 2a and the tip of the head substrate 2.

The shaft 15 is loosely fitted into the through hole 2a of the head substrate 2.

Therefore, when the head substrate 2 is in the first position, that is, when it is retreating in the Y direction, the shaft 15 comes into contact with the two tapered surfaces of the through hole 2a, as shown in FIG.
It retreats in the Y direction against the biasing force of the spring 17.

Therefore, the rolling pulley and the driving pulley 11 are separated from each other.

On the other hand, when the head substrate 2 is in the second position, the head substrate 2 moves forward in the Y' direction as shown in FIG. 4, so that the shaft 15 retreats to the vicinity of the center of the through hole 2a.

At this time, the drive boo 1111 moves in front of the head board 2.
Since the shaft of the head board 2 enters the groove 2b of the head substrate 2, the rolling pulley 12 and the driving pulley 11 are in circumscribed contact with each other.

Since the movable plate 14 is disposed on the base plate 1 so as to be able to swing freely, when the transfer pulley 11 rotates the transfer boot 1 2, the rotation reaction force causes the transfer boot 1 2 to move x in the figure. ,
x'Move forward.

The same applies when the head substrate 2 is in the third position.

Reference numerals 13 and 13 denote cassette holding springs, which are fixed to the head board 2, and when the head board 2 is in the first position, do not contact the cassette half 3, and when in the second and third positions, the cassette holding springs are fixed. It is configured to press the half 3 in the Y' direction.

In the above configuration, when the head substrate 2 is in the first position as shown in FIG. 1, the tape recorder is in a stopped state.

That is, the recording/reproducing head 5 and the erasing head 6 are connected to the tape 3b.
The pinch roller 7 is separated from the capstan shaft 4, and the rolling pulley 12 is separated from the drive pulley 11, so that the tape 3b is not run but stopped.

At this time, the cassette presser springs 13.13 are separated from the cassette half 3, as shown in FIG.

Next, as shown in FIG. 2, when the head substrate 2 is in the second position and the drive pulley 11 is rotating in the L1□ direction, the tape recorder is in a fast forward state.

That is, the recording/reproducing head 5 and the erasing head 6 are connected to the tape 3b.
The pinch roller 8 is separated from the capstan shaft 4, and the rolling pulley 12 circumscribes the drive pulley 11 and is rotated in the R12 direction, as shown by the broken line in FIG. 2 due to the rotational reaction force. The tape 3b is moved in the X direction until it circumscribes the take-up reel 9, and the take-up reel 9 is rotated in the L9 direction to cause the tape 3b to run in the X direction.

At this time, the cassette presser springs 13.13 press the cassette half 3 in the Y' direction, as shown in FIG. 6, and prevent the cassette half 3 from moving.

On the other hand, when the head substrate 2 is in the second position and the drive pulley 11 is rotating in the R11 direction, the tape recorder is in a rewinding state.

That is, the recording/reproducing head 5 and the erasing head 6 are connected to the tape 3b.
The pinch roller 8 is separated from the capstan shaft 4, and the rolling pulley 12 circumscribes the drive pulley 11 and is rotated in the L1□ direction, and the rotational reaction force causes the two points shown in FIG. Supply reel 1 as shown by the dashed line
Move the supply reel 10 in the X' force direction until it circumscribes the
The tape 3b is rotated in the 1o direction to run in the X' force direction.

At this time, as shown in FIG. 6, the cassette presser spring 13.
13 presses the cassette half 3 in the Y' direction to prevent the cassette half 3 from moving.

Next, as shown in FIG. 3, when the head substrate 2 is in the third position, the capstan shaft 4 is rotating in the L4 direction, and the drive pulley 11 is rotating in the L1 direction, the tape recorder Recording or playback status.

That is, the recording/reproducing head 5 and the erasing head 6 are connected to the tape 3.
b, the pinch roller 8 sandwiches the tape 3b and contacts the capstan shaft 4, causing the tape 3b to run in the X direction at a speed suitable for recording and playback, and the rotary pulley 12 circumscribes the drive pulley 11. It is rotated in the R direction and moved in the X direction until it circumscribes the take-up reel 9 due to the rotational reaction force, rotates the take-up reel 9 in the L9 direction, and is created by the capstan shaft 4 and the pinch roller 8. Then, the tape 3b is wound up.

At this time, the cassette presser springs 13.13 press the cassette half 3 in the Y' direction, as in FIG. 6, and prevent the cassette half 3 from moving.

In the above embodiment, the cassette presser springs 13 and 13 press the cassette half 3 in the Y' direction when the head board 2 is in the second and third positions. It is also possible to press the button only when it is in the third position where movement should be prevented.

In this way, the present invention obtains each state of stop, fast forward or rewind, recording or playback of the tape recorder by providing the first, second and third positions to the head board, and the magnetic head is controlled in each state. and the connection and separation of the tape,
Because it is designed to switch between the capstan shaft and the pinch roller, and between the rotary pulley and the drive pulley,
Reliable switching operation can be expected with a simple configuration.

Moreover, the contact pulley, which bites between the supply reel or the take-up reel depending on the direction of rotation of the drive pulley, is rotatably supported at one end of the movable plate, and the pin provided at the other end of the movable plate is connected to the board. A pair of retaining parts (pins 18 and 18
), the contact pulley is supported by the spring so as to be swingable.

Therefore, in addition to the biasing force from the spring, a winding force from the drive pulley acts on the rotary pulley to ensure that the rotary pulley is wedged between the drive pulley and the supply reel or take-up reel. This has the advantage that the accuracy and assembly accuracy of individual parts can be configured a little more roughly, making it easier to assemble, compared to the conventional case where the support is swingable using pins embedded in the board. It has the following.

[Brief explanation of the drawing]

The drawings all show one embodiment of the present invention, and FIGS. 1 to 3 are plan views showing each state of stop, fast forward or rewind, recording or playback, and FIGS. 4a and 4.
) and C are a plan view and a sectional view showing the vicinity of the rotary pulley, and FIGS. 5 and 6 are side views for explaining the operation of the cassette presser spring. 1... Board, 2... Head board, 3.
...Cassette half, 4 ... Capstan shaft, 5 ... Recording head, 6 ... Erasing head, 7 ... Pinch roller arm, 8...
... Pinch roller, 9 ... Take-up reel, 10
...... Supply reel, 11... Drive pulley, 12... Transfer pulley, 13... Cassette presser spring.

Claims (1)

[Scope of utility model registration request] A pin provided at one end of the movable plate is engaged with the center portion of a spring installed between a pair of retaining portions provided on the board, so that the movable plate can be rotated about the center portion of the spring as a fulcrum. and a first and a second tape cassette supported by the substrate so as to be movable forward and backward relative to the tape cassette mounted on the substrate.
, a through hole of a size that allows rotational movement of the movable plate is formed at the tip of the head substrate that takes the third position, and a through hole is provided at the other end of the movable plate that penetrates the through hole. A rotary contact pulley rotatably attached to the tip of the shaft is biased toward the drive pulley by the spring, and the rotary contact pulley is moved toward and away from the drive pulley in accordance with the sliding movement of the head substrate; The swinging mechanism is configured such that when the drive pulley is rotated in contact with the drive pulley, either the supply reel or the take-up reel comes into contact with one of the reels due to the rotational reaction force, and rotates the reels. When the head substrate is in the first position, the magnetic head and pinch roller on the head substrate are separated from the tape and capstan shaft, respectively, and the rotary pulley is separated from the drive pulley, and the head substrate is in the second position. In some cases, the magnetic head and the pinch roller are separated from the tape and capstan shaft, respectively, the contact pulley is in contact with the drive pulley and the supply reel or the take-up reel, and the head substrate is in a third position. A switching device for a tape recorder, wherein the magnetic head and the pinch roller are in contact with the tape and the capstan shaft, respectively, and the rotary pulley is in contact with the drive pulley and the supply reel or take-up reel.