JPS6334128Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment/detachment mechanism for a tape recorder in which a cassette is inserted almost horizontally through an insertion slot, lowered to enter a recording/playback state, and raised to enter a standby state.

Conventionally, many mechanisms such as those described above have been used, but among them, for example, as shown in FIGS. The pushed cassette container 2 is set in an upward waiting state by the roller 4 provided on the support plate 3 coming into contact with the peripheral edge of the locking plate 6, and as the cassette 1 enters, the arm 7 whose tip comes into contact with it When the lock plate 6 connected to the lock plate 6 rotates as it moves, and at this time the roller 4 moves along the arc-shaped peripheral edge while receiving the force acting on it from the spring 5, the roller 4 is moved so as to resist the frictional force of this area. The cassette 1 had to be inserted with strong force, and the usability was not necessarily good.

The present invention improves this point, and provides a good operating feeling with a light insertion force.

3 and subsequent figures show embodiments of the present invention, in which a support plate 13 supported by a shaft 11 on a side plate 10-1 provided on the side surface of the base plate 10 rotates the cassette container 12 by means of a hinge-like joint 14. I freely support it. The cassette container 12 can be raised and lowered while maintaining a substantially horizontal position using guide holes 15 provided in another side plate 10-2 and protruding pins 16 on the side as guides.
Further, a slit 17 is provided on the side surface parallel to the direction in which the cassette 31 is inserted, and a roller 18 passing through the slit faces the position where it comes into contact with the tip of the cassette. Eject arm 19 has a long slit 20
, the side pin 22 of the lock plate 21 is engaged with this slit, and the spring 23 is connected to the side plate 10-2.
It is stretched between and urged to the right in the drawing.
The lock plate 21 is rotatably supported by a shaft 24 on the side surface of the base plate 10, and is biased clockwise by a torsion spring 25.
1-2 is configured to abut and lock onto the roller 26 on the side surface of the support plate 13.

The cassette container 12 is rotated by the rotational force that the support plate 13 receives from the spring 27 provided between its vertical end 13-1 and the rear wall 10-3 of the base plate 10.
The drawing is receiving a downward biasing force. Also, the substrate 10
A roller 28 provided on the other side surface 13-2 of the support plate 13 engages with an engaging portion of an eject lever 29, and the eject lever 29
0 to the right in the drawing, and the engaging portion includes an upper engaging portion 29-1, a lower engaging portion 29-2, and a push-up oblique side 29-3.

Figures 3a and 3b show the standby state before the cassette is installed.

In this state, the cassette container 12 is held in the raised position by the roller 26 being locked to the locking step 21-1 of the locking plate 21 which is biased clockwise, even though the cassette container 12 is receiving the downward biasing force. has been done. The eject arm 19 is biased to the right in the drawing by a spring 23 to a position where the pin 22 abuts the leftmost end of the slit 20. The pin 28 on the other side surface 13-2 of the support plate 13 enters the upper engaging portion 29-1 of the eject lever 29 and engages the spring 30.
This prevents the eject lever 29 from moving to the right.

The cassette 31 is inserted from the right side in the drawing in the direction of arrow A. Its tip is a roller 18 inside the container 12.
, so the eject arm 19 presses the spring 2
It moves in the direction of arrow A against the acting force of 3. The insertion pressure progresses, and near the end, the slit 20
When the right end of the eject arm 19 comes into contact with the pin 22, the lock plate 21 is rotated against the force of the spring 25, and the roller 26 deviates from the upper peripheral edge 21-2. right corner 19
-1 is at this point the lock plate 21 as shown in Figure 3c.
The eject arm 19 and the lock plate 21 are both displaced as the roller 26 temporarily moves to this part and as the pressure of the cassette 31 progresses, the eject arm 19 and the lock plate 21 are both displaced, and eventually the roller 26
As the support plate 13 rotates along the right side 19-2 of the eject arm 19, the cassette container 12 is lowered to the recording/reproducing position.
The biasing force of the eject arm 19 to the right in the drawing by the spring 23 is stopped when the roller 26 reaches the right end side 19-2.

Since the pin 28 on the other side surface 13-1 of the support plate 13 also rotates downward, the eject lever 29 is released from the lock and moves forward, and the pin 28 engages with the lower engagement portion 29-2. This state of the lower recording/playback position is the fourth
Figures a and b.

The cassette 31 is ejected by pressing the ejector lever 29 in the direction of arrow A. As a result of this operation, the push-up oblique side 29-3 pushes up the pin 28, so that the support plate 13 rotates counterclockwise against the force of the spring 27 and lifts the cassette container 12 upward.

On the other hand, the roller 26 on the other side also reaches the right end corner 19-1 of the ejector lever 19 in the reverse process as described above, and then the peripheral edge 21-2 of the rotating plate 21 causes the torsion spring 25 acting on the locking plate 21. At the same time, the eject arm 19 is released from the lock by the roller 26 and quickly returns to the right in the drawing by the spring 23, and the eject arm 19 moves under the roller 26 and pushes it up. presses the tip of the cassette 31 and ejects it. As the ejector lever 19 returns, the locking plate 21 is further rotated by being pressed against the pin 22 at the left end of the slit 20, and the locking step 21-1
The rollers 26 are locked to hold the cassette container 12 at the upper standby position again.

The upper engaging portion 29-1 of the eject lever 29 is retained by the roller 28 and held in the retracted state.

It is desirable that the upper peripheral edge 21-2 of the lock plate 21 be very short.

By doing so, most of the process of inserting the cassette, which is the object of the present invention, can be performed with only the insertion force that stretches the spring 23, and a light insertion force can be obtained.

The ejector lever 29 is also provided with a well-known function for advancing and retracting a head and a pinch roller as the lever moves forward and backward, but since this is separate from the gist of the present invention, a description thereof will be omitted.

As described above, according to the present invention, there is a cassette container that can be raised and lowered between an upper standby position and a lower recording/reproducing position and is biased downward by a spring, and a cassette abutment facing the inside of the cassette container. an eject arm that slides in parallel to the cassette advancing and retracting direction and is biased in the cassette ejection direction;
The cassette container is engaged with a roller connected to the side surface of the cassette container to maintain its upper standby position, and a pin on the end surface is engaged with a slit provided in the eject arm, and the cassette is urged in the cassette ejection direction, and the substrate side surface is Since the end of the slit presses the pin at the end of the cassette insertion process, the insertion force required for the cassette insertion process is very light, and the insertion force is very low. Since a rapid termination state can be obtained at the end of insertion, there is a great sense of moderation, and this has great practical effects when used in small tape recorders such as cassette car stereos.

[Brief explanation of the drawing]

Figures 1 and 2 are side views explaining the operation of the conventional example;
Figure 3 is a side view of the main part of the present invention before the cassette is inserted, b is an explanatory side view of the other side, Figure 3c is a side view of the main part at the final stage of cassette insertion, and Figure 4 is the cassette installed. In the completed state, a is a side view of the main part, and b is an explanatory side view of the other side. , 19...Eject arm, 20...Slit, 21...Lock plate, 22
...Pin, 23...Spring, 25...Torsion spring, 26...Roller, 27...Spring.

Claims (1)

[Scope of utility model registration request] It is possible to move up and down between the upper standby position and the lower recording/playback position.
The cassette container has a cassette container that is biased downward by a spring and a cassette contact portion that faces the inside of the cassette container. an eject arm that engages with a roller connected to the side surface of the cassette container to maintain its upper standby position, is biased by a spring in the cassette ejection direction, and a lock rotatably supported on the side surface of the board. and a pin protruding from the lock plate faces a slit cut out in the eject arm, and at the end of the cassette insertion process,
The end of the slit presses the pin and rotates the lock plate in the cassette insertion direction against the spring, disengaging the roller and lowering the cassette container to the recording/playback position. A tape recorder cassette attachment/detachment mechanism characterized by the following.