JPH0319080Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing mechanism for a pocket that accommodates a cassette half in a cassette tape recorder used in electronic application equipment such as audio equipment or external storage for computers.

In the conventional pocket opening/closing mechanism of this type of cassette tape recorder, the half pocket is pivotally supported on the chassis, and a spring is mounted on the half pocket in a direction that always opens the half pocket.
After storing the cassette in the half pocket, push the half pocket against the spring to push the positioning pin protruding into the half pocket along the inclined part of the eject lever, and set the positioning pin deep in the inclined part. The position of the half pocket is held by locking the half pocket with the hook part, and the eject lever is further rotated in a direction in which the hook part releases engagement with the positioning pin, and the half pocket is opened by the spring. It is something.

Therefore, when pushing in the cassette half, the positioning pin must be pushed in along the slope, and if the slope is steep, force is required to push the cassette half, and the positioning pin may not enter the hook. In order to avoid such problems, the length of the slope can be reduced by making the slope gentler. As the half pocket becomes longer and protrudes from the side of the half pocket, the frictional resistance between the inclined part and the positioning pin increases, which may impair the force of the spring that opens the half pocket, or in particular use a dumping device to slow down the opening speed. In some cases, this tendency becomes stronger and there are disadvantages such as the opening operation stopping midway.

In order to eliminate the above-mentioned drawbacks, the present invention has been developed by holding the hook portion of the eject lever in a disengaged position with respect to the positioning pin when the half pocket is opened, and when the half pocket is pushed in to close it. Near the end position, the hook part is released from the non-engaging position and the hook part is engaged with the positioning pin, thereby eliminating the two-stage operation when opening the half pocket and reducing the load when closing it. The purpose of this invention is to provide an opening/closing mechanism with good feeling.

To describe the illustrated embodiment of the present invention in more detail, the support member 1 attached to the chassis
A shaft 4 of a half pocket 3 is inserted into the hole 2, and a spring 5 is mounted on the shaft 4 to bias the half pocket 3 in a direction in which it is always opened.

Two support shafts 6 and 7 are installed on the support member 1, and the support shaft 6 has a hook portion 9 that engages with the positioning pin 8 of the half pocket 3, a slope portion 10, and an operating portion that is pressed by the eject button 11. 12, and the spring 14 is moved into the support member 1 in the direction in which the hook portion 9 engages with the positioning pin 8.
It will be constructed between.

A detection lever 16 with a detection claw portion 15 at the tip and a lock lever 18 having a spring 17 mounted between it and the support member 1 are pivotally supported on the support shaft 7, and the eject lever 13 has a detection lever 16 and a hook portion. Lock pin 1 between 9
9 is inserted into the hole 21 having the locking step 20 of the lock lever 18 so that the lock pin 19 comes into contact with one side of the locking step 20 by the spring 17. The detecting lever 16 is provided with a slope 24 which is pushed by the detecting pin 23 of the eject lever 13 when the half pocket 3 is opened, and is configured to push the switch 25.

Therefore, when the eject button 11 is pressed in the closed state of the half pocket 3 shown in FIG. 2, the eject lever 13 rotates against the spring 14.
Since the hook portion 9 releases the locking of the positioning pin 8 of the half pocket 3, the half pocket 3 is pushed by the spring 5 and opened.

At the same time, lock pin 19 of eject lever 13
Press one side of the locking step 20 of the lock lever 18 to rotate the lock lever 18 and release the lock pin 19.
enters the other surface of the locking stepped portion 20 and prevents the eject lever 13 from returning to its old position by being pulled by the spring 14, thereby holding the hook portion 9 in a non-engaging position with respect to the positioning pin 8. do.

At the same time, the detection pin 23 of the eject lever 13
presses the slope 24 of the detection lever 16 and switches the switch 2.
5 is operated, and the detection claw portion 15 of the detection lever 16 is lifted to bring the detection claw portion 15 into a non-detecting state, and the half pocket 3 is brought into the open state shown in FIG.

In this state, if the cassette half is inserted into or removed from the half pocket 3 and then pushed into the case of the tape recorder so that the half pocket 3 rotates around its axis 4, the positioning pin 8 of the half pocket 3 will be Receptacle 2 of lock lever 18
2 to rotate the lock lever 18 against the spring 17, release the locking of the locking pin 19 by the other surface of the locking step 20, and release the locking lever 13.
is rotated by the spring 14, and its hook portion 9 locks the positioning pin 8, thereby holding the half pocket 3 in a closed state.

At the same time, the pressing down of the slope 24 by the detection pin 23 of the ejection lever 13 is released, and the detection claw part 15 of the detection lever 16 can be lowered, so that the state of the cassette half can be detected, and the half pocket is closed as shown in Fig. 2 of the drawing. Return to state. In the embodiment described above, the detection lever 16 and the lock lever 18 are supported by the same support shaft 7, but there is no problem even if the detection lever 16 and the lock lever 18 are supported by separate support shafts.
6 is not used, and furthermore, the support shaft 7 of the lock lever 18 is the shaft 6 of the eject lever 13.
Alternatively, the receiving part 22 of the lock lever 18 can be pressed against the half pocket 3.
Of course, various modifications can be made without changing the spirit of the present invention, such as the possibility of using a dedicated pressing section instead of the positioning pin 8.

Furthermore, the present invention can be applied not only to the opening/closing mechanism of the pocket of a cassette tape recorder but also to the locking mechanism of the hood of a record player and the locking mechanism of other operation buttons.

Since the present invention has the above-mentioned structure and operation, the operating force of the eject button is only required to rotate the eject lever against the spring force to open the half pocket, and the spring force is sufficient to close the half pocket. Since it is sufficient to rotate the lock lever against the force, only a small amount of operating force is required, and therefore the operation has a sense of moderation, and each part operates smoothly without causing wear. It does not require the strength of the half pocket and its axis like the conventional one,
Moreover, since the inclined part of the eject lever is not pressed by a positioning pin, the angle of the inclined part can be designed freely, which eliminates space limitations and increases the degree of freedom in design.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the half pocket in an exploded state, FIG. 2 is a side view of the half pocket in a closed state, and FIG. 3 is a side view of the half pocket in an open state. 1... Support member, 3... Half pocket, 5...
... Spring for half pocket biasing, 6 ... Eject lever support shaft, 7 ... Lock lever support shaft, 8
... Positioning pin, 9 ... Hook part, 13 ... Eject lever, 14 ... Spring for biasing the eject lever, 17 ... Spring for biasing the lock lever,
18... Lock lever, 20... Locking step, 22
...Ukebe.

Claims (1)

[Claims for Utility Model Registration] It has an opening rotatably supported between the support members 1 of the chassis and into which a cassette half can be inserted and a positioning pin 8, and the opening is always open. The half pocket 3 is biased; the eject lever 13 is pivotally supported on the support shaft 6, the hook portion 9 is biased to lock the positioning pin 8, and the lock pin 19 is installed; a lock lever 18 which is pivotally supported by the support member 1 and has a locking step 20 that locks the lock pin 19 of the eject lever 13 on either side and a receiving portion 22 that is pushed by the half pocket 3; A pocket opening/closing mechanism for a cassette tape recorder, comprising: a biasing member 17 that biases the lock lever 18 to lock the lock pin 19 on either surface of the lock step 20.