JPH0346901B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cassette-type tape recorder.

Conventional Structures and Their Problems Generally used cassette type tape recorders have separate springs for returning the head board and springs for pressing the pinch roller against the capstan.
Therefore, in this type of device, it is necessary to provide a separate mounting structure for mounting these springs, and there are problems in that the number of parts as a whole is large and the mounting work is very troublesome.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks, and aims to provide an excellent tape recorder that has a simple structure and is easy to assemble.

Structure of the Invention The tape recorder of the present invention is constructed so that one spring can simultaneously apply an appropriate biasing force to the head board and the pinch roller.

DESCRIPTION OF EMBODIMENTS The tape recorder of the present invention will be described below with reference to drawings of one embodiment. In the figure, 1 is a tape cassette, 2 is a main board on which the tape cassette 1 is placed, 3 is an arm shaft for pivoting the pinch roller arm attached to the main board 2, and 4 is a main board near the arm shaft 3. 2 is a spring mounting shaft attached to the main board 2, 5a, 5b, 6a, and 6b are all guide pins attached to the main board 2, 7 is a capstan shaft rotatably pivoted to the main board 2, and 8 is a guide hole. 12a, 12b, 13a, 13b are slidable head boards fitted with guide pins 5a, 5b, 6a, 6b, respectively; 9 is a spring engagement pin attached to the head board 8; 10, 11 are head boards. A head for recording/playback and erasing is attached to the board 8, 14 is a pin for locking the pinch roller arm attached to the head board 8, and 15 is a coil part 15d fitted to the shaft 4 for spring attachment, and one end thereof. The portion 15a is engaged with the arm shaft 3 for attaching the pinch roller arm, and the folded portion 15b is formed at the other end.
is engaged with a spring engaging portion 16a of the pinch roller arm 16 pivotally mounted on the arm shaft 3, and a straight portion 15c extending to the folded portion 15b at the other end is a spring engaging portion attached to the head board 8. A spring 17 engaged with the pin 9 is a pivot shaft for pivotally connecting the pinch roller 18 to the pinch roller arm 16.

In the above embodiment, the spring 15 has a coil portion 15d and a folded portion 15b as described above, the coil portion 15d is fitted onto the shaft 4, and the folded portion 15b is a spring engaging portion provided on the pinch roller arm 16. 16a. One end portion 15a of the spring 15 is engaged with the arm shaft 3 for attaching the pinch roller arm, and the other end portion 15a is engaged with the arm shaft 3 for attaching the pinch roller arm.
The straight portion 15c extending up to 5b is engaged with a locking pin 9 provided on the head board 8. Therefore, in a steady state, the head substrate 8 is receiving a biasing force in the direction of arrow a, and the pinch roller arm 16
is receiving an urging force in the direction of arrow b.

Now, if the head board 8 is pressed in the direction opposite to the direction of the arrow a, the heads 10 and 11 will also be pressed in the direction of the arrow a.
and in the opposite direction, and can be switched to recording, playback, or other states. In this state, pin 14
Similarly, since the pinch roller arm 16 also moves in the direction of the arrow b by the force of the spring 15, the pinch roller 18 comes into pressure contact with the capstan shaft 7.

When the tape recorder is stopped, the head board 8 is returned to its original position by the force of the spring 15, so the pinch roller arm 16 is similarly returned to its original position by the pin 14.

Effects of the Invention As is clear from the above embodiments, the tape recorder of the present invention has a folded part integrally formed with a spring that applies a return force to the head board, and the tip of the folded part is engaged with a pinch roller arm. It is configured to apply a biasing force to the pinch roller arm at the same time in the direction of pressing against the capstan, and one spring can apply appropriate biasing force to both the head board and the pinch roller arm, which improves overall performance. Its configuration is extremely simple,
It has the advantage of being extremely easy to manufacture and assemble. In particular, according to the present invention, a coil portion is formed on the spring, and this is fitted onto a shaft provided on the main board.
One end is engaged with the main board, a folded part is formed at the other end, this folded part is engaged with the pinch roller arm, and a straight part is provided on the head board up to the folded part of the other end. Since the spring is configured to engage with a pin that has been bent, the biasing force applied to the head board and the biasing force applied to the pinch roller arm can be adjusted by arbitrarily selecting the number of turns in the coil part of the spring, the coil diameter, the shape of the folded part, etc. can be set arbitrarily and its design is very easy.

[Brief explanation of drawings]

FIG. 1 is a schematic top view of an embodiment of the tape recorder of the present invention, and FIG. 2 is a side view of the same embodiment. 1... Tape cassette, 2... Main board, 3...
Arm axis, 4... axis, 5a, 5b, 6a, 6b...
... Guide pin, 7 ... Capstan shaft, 8 ... Head board, 9 ... Locking pin, 10, 11 ... Head, 12a, 12b, 13a, 13b ... Guide hole, 14 ... Locking pin , 15... Spring, 15a... One end, 15b... Turned part, 15
c...Straight line part, 15d...Coil part, 16...Pinch roller arm, 17...Pivot shaft, 18...Pinch roller.

Claims (1)

[Claims] 1. Fit the coil part of the spring onto a shaft provided on the main board, engage one end of the spring with the main board or a pin, shaft, etc. provided on the main board, and attach a folded part to the other end of the spring. The tape recorder is constructed such that a linear portion up to a folded portion at the other end is engaged with a head substrate, and a tip end of the folded portion is engaged with a pinch roller arm.