JPS606957Y2 - Cassette holder opening/closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening operation buffering device for an opening/closing device for a cassette holder of a recording/playback device.

A schematic diagram of a conventional shock absorber of this type of device is shown in FIG.

In the drawing, 1 is a housing of the recording/reproducing device, 2 is a cassette holder, 3 is a shaft that bears one end of the cassette holder 2 in the housing 1 so as to be openable and closable, and 4 is a spring that elastically biases the cassette holder 3.

5 is a connecting member such as a thread, and one end is connected to the cassette holder 2.
The flywheel 8 has an appropriate inertia force in the middle, and is wound around the drive shaft 6 of a flywheel 8 whose speed is appropriately increased.The other end is fixed to one end of a spring 9.

The other end of the spring 9 is fixed to a member 1o fixed to the housing 1.

7 is a bearing that supports the drive shaft 6.

If the cassette holder 2 is pressed inward against the elasticity of the spring 4, it will be locked by a locking member (not shown) and playback/recording will be possible.

It is well known that the locking member releases the cassette holder by the eject operation, and the cassette holder 2 is opened as shown in the figure by the elasticity of the spring 4.

When the cassette holder 2 is opened, the elastic force of the spring 4 rotates the flywheel 8, and the rotation speed of the flywheel 8 gradually increases due to an appropriate inertial force.

Since the opening movement of the cassette holder 2 is restricted by the rotation of the flywheel 8, the opening movement of the cassette holder 2 is slow.

The relationship between the position of the cassette holder 2 during the opening operation and the opening operation speed of the cassette holder 2 is shown in FIG.

With the opening operation of the cassette holder 2, the elasticity of the spring 4 decreases and the increase in the rotational speed of the flywheel 8 gradually decreases, but this rotational speed reaches its maximum at the end of the opening operation.

The opening speed of the cassette holder 2 is proportional to the rotational speed of the flywheel 8.

Therefore, in order to minimize the collision with the casing 1 at the end of opening, the cassette holder must be operated very slowly over the entire period of opening.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide an opening/closing device that opens the cassette holder at an appropriate speed in the middle, but at a very slow speed just before the end of opening. .

An embodiment of the present invention is shown in FIG.

An elastic coil spring 11 is interposed between the cassette holder 2 and the connecting member 5.

The opening operation of the cassette holder 2 of the present invention is shown in FIG. 4.

The cassette holder 2 is released from the lock by the eject operation, and attempts to open due to the elasticity of the spring 4.

The flywheel 8 does not rotate rapidly due to inertia,
The coil spring 11 stretches so that the elasticity of the coil spring 11 becomes equal to the elasticity of the spring 4.

Therefore, the cassette holder 2 is opened relatively quickly from the beginning to the middle of the opening operation.

When the elasticity of the spring 11 and the elasticity of the spring 4 become equal, the elasticity of the spring 4 drives the flywheel 8 to rotate.

As the flywheel 8 rotates, the cassette holder 2 is further opened.

As the spring is opened, the elasticity of the spring 4 decreases, and the coil spring 11 also contracts according to the elasticity of the spring 4.
The opening speed becomes slower.

Immediately before the end of the opening operation, the spring 4 has little elasticity.
There is no increase in the number of rotations of the flywheel 8, and the coil spring 1
1, the speed of the cassette holder 2 becomes even slower.

As described above, the opening speed of the cassette holder 2 is fast from the closed state to the halfway position, and thereafter moves slowly.

FIG. 5 shows another embodiment of the present invention, in which a connecting member 5 is wound around a rotating shaft 12 and a flywheel 8 is connected to the rotating shaft 12.
The drive shaft 6 is drivingly connected to the drive shaft 6 by a spring spring 13.

The spring spring 13 is elastically displaced by the elastic force of the spring 4 accompanying the eject operation, and then the elastic displacement of the spring spring 13 is gradually canceled as the cassette holder 2 is opened.

As a result, the opening operation shown in FIG. 4 can be obtained.

Although a thread is used as the connecting member, a chain or a rack and pinion can also be used.

In addition to the coil spring 11, an elastic body such as a rubber string can be used as the elastic connecting member, and a rubber rod or the like can also be used in place of the spring spring 13.

In the present invention, a flywheel is used as a speed governor, but a speed governor may also be used that utilizes air resistance of air blades due to rotation.

As described in detail above, the present invention can significantly reduce the opening speed of the cassette holder at the end of opening the cassette holder, reduce the impact caused by opening, and have great practical effects.

[Brief explanation of drawings]

FIG. 1 shows a conventional example, and FIG. 2 shows the opening operation of the conventional cassette holder. FIG. 3 shows an embodiment of the present invention, and FIG. 4 shows the cassette holder opening operation of the device of the present invention. FIG. 5 shows another embodiment of the invention. 1... Recording/playback device housing, 2... Cassette holder, 4... Spring, 5... Connecting member, 6... Fly Wheel drive shaft, shaft...
... Flywheel, 11... Coil spring, 12.
... Rotating shaft, 13 ... Spring spring.

Claims (1)

[Claims for Utility Model Registration] 1. One end of a cassette holder is pivotally supported in a recording/playback device so as to be freely openable and closable, and an elastic member is stretched between a part of the housing of the recording/playback device and the cassette holder, and the cassette holder is In the opening/closing device, a flywheel having an appropriate inertia is connected by a connecting member, and the flywheel is rotationally driven when the cassette holder is opened.
An opening/closing device for a cassette holder, characterized in that an elastic connecting member is interposed between the cassette holder and the flywheel of a connecting member that connects the cassette holder to a housing via a flywheel. 2. The cassette according to claim 1 of the utility model registration claim, characterized in that one end of the elastic connecting member is fixed to the cassette holder, and the other end is connected to the connecting member wound around the drive shaft of the flywheel. Holder opening/closing device. 3. The cassette holder opening/closing device according to claim 1, wherein the rotating shaft around which the connecting member is wound and the drive shaft for driving the flywheel are drivingly connected by a spring spring.