JPS599388Y2 - Cassette recorder lid opening/closing structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the lid opening/closing structure of a cassette recorder so that the lid can be opened slowly.

Conventionally, as means for gently opening this type of lid, a friction member has been provided to resist a spring member acting on the lid in the opening direction and the lid can be opened gently, or an oil damper has been used. Ta.

However, in the former case, the friction member wears out after many years of use and no longer functions as a damper, and in the latter case, the oil damper is a piston type, so it is long and can be used for small cassette recorders. It was unsuitable for.

This idea was developed in view of the above points, and its purpose is to make it possible to increase the opening and closing angle of the lid while using a rotary oil damper with a small rotation angle, and to achieve miniaturization. To provide a lid opening/closing structure for a cassette recorder.

Next, an embodiment of this invention will be described with reference to the drawings.

1 is a chassis; 2 is an upright piece 1a formed on the chassis 1;
, 1a, a shaft 3 is a lid (so-called kangaroo pocket type lid) for storing and holding a cassette 4, and support pieces 5, 5' are attached to both sides.

The support pieces 5, 5' are rotatably supported on the shaft 2.

Reference numeral 6 designates a spring member having a coil portion inserted through one end of the shaft 2, one end of which is engaged with one of the support pieces 5', and the other end of which is engaged with the chassis 1, and the lid body 3 is normally spring-loaded in the opening direction by this spring member. power is given.

Reference numeral 7 designates a stopper fixed to one end of the shaft 2 (the right end in FIG. 1) by caulking or other means, and an engaging piece 7a is shaped at one end to be engaged with the engaging piece 5a protruding from the support piece 5. At the same time, an abutment piece 7b is formed at the other end to abut against the chassis 1 when the lid body 3 is opened.

Reference numeral 8 designates a group of operating levers for performing play, stop, etc. operations, each of which is held in a horizontal state by a spring 9.

Of the group of operating levers 8, a stop lever (a two-operation type, the first operation is for stopping and the second operation is for ejecting) is designated as 8a.

Reference numeral 10 denotes a head stand having a recording/reproducing head 10a and an erasing head 10b, which moves forward by operating a play lever 8b and places the heads 10a, 10b within the window of the cassette 4.
is inserted, and the Vinci roller 11 is also inserted into the window.

Reference numeral 12 denotes an oil damper fixed to the upright piece 1b of the chassis 1, and a gear 12a is fixed to the rotating shaft so that a damper effect is exerted on the rotation of the gear 12a.

Reference numeral 13 denotes a control plate rotatably supported by the upright piece 1C of the chassis 1, and a forked retaining piece 13 whose one end is engaged with a protrusion 5a' formed on the support piece 5' described above. a, and a fan-shaped tooth portion 13b that meshes with the gear 10a described above.

Reference numeral 14 designates a lock plate pivotally supported by the upright piece 1d of the chassis 1, and a spring 15 is interposed between the rear end and the chassis 1 to apply a clockwise rotational force in FIG.

A hook portion 1Aa is formed on the front end, and this is engaged with a hook portion 3a formed on the lid body 3.

10C is a lock release piece extending from the above-mentioned head stand 10, and the rear end of the above-mentioned lock plate 14 is brought into contact with it,
When the head stand 10 moves backward, the lock plate 14 is moved by the spring 1.
Rotate counterclockwise in FIG. 3 against the spring force of 5.

Therefore, the hook portion 14a of the lock plate 14 and the hook portion 3a of the lid body 3
The engagement with is released.

Next, to explain the operation based on the above structure, when the cassette 4 is inserted into the lid 3 and closed, the lid 3 resists the spring force of the spring member 6. Lock plate 14
The hook portion 14a of the lid body 3 is engaged with the hook portion 3a of the lid body 3.

When the stop lever 8a is operated in this state, the play, rewind, or fast forward state is first released, and the next operation causes the head stand 10 to move backward, so that the lock release piece 10C locks against the spring force of the spring 15. Rotate the plate 14.

As a result, the engagement between the hook portions 14a and 3a is released, so the support piece 5 is rotated by the spring force of the spring member 6 engaged with the support piece 5', and therefore the lid body 3 is rotated in the opening direction. Let's have candy.

At this time, the engagement piece 13a of the control plate 13 and the protrusion 5a of the support piece 5
' are engaged, so the control plate 13 is rotated.

Since the tooth portion 13b of the control plate 13 is meshed with the gear 12a of the oil damper 12, the rotation of the control plate 13 is caused by the damping force acting on the oil damper 12 against the spring force of the spring member 6. , the lid body 3 is opened slowly.

When the contact piece 7b of the stopper 7 comes into contact with the chassis 1, the opening of the lid 3 is completed.

If the operating force is increased when operating the stop lever 8a, the upper part of the shaft hole 8a' of the lever 8a comes into strong contact with the shaft 2.

Here, the shaft 2 and the stopper 7 are fixed, and the stopper 7 is rotated together with the support piece 5. Therefore, when a rotation preventing force is applied to the shaft 2 by the lever 8a, the spring force by the spring member 6 is applied to the shaft 2. It acts as a force to resist.

Therefore, the lid 3 is opened by using the oil damper 12 and the lever 8a.
Due to the rotation prevention force, the opening is performed more slowly.

As mentioned above, this idea uses an oil damper that has a damping effect in the direction of rotation, and also opens the lid using a control plate that has fan-shaped teeth that mesh with a gear fixed to the rotation shaft of the damper. By doing so,
The small damper does not take up much space, and the lid body can be opened and closed at a large angle, so it is particularly effective when applied to small cassette recorders.

[Brief explanation of drawings]

The figures show an embodiment of the lid opening/closing structure of a cassette recorder according to this invention, in which Fig. 1 is a front view, Fig. 2 is a plan view of a part of the oil damper, and Fig. 3 is a side view of Fig. 1, and Fig. 3 is a side view of Fig. 1. FIG. 4 is a side view of a part of the stop lever in cross section. 1...Chassis, 2...Shaft, 3
...Lid body, 6...Spring member, 8...
...A group of operating levers, 12...Oil damper, 13
...Control board, 14...Lock board.

Claims (1)

[Scope of utility model registration request] A lid body that houses and holds a cassette, one end of which is supported by the chassis and is applied with a spring force in the opening direction; an oil damper that acts as a damper in the rotational direction; and the oil damper and fan-shaped teeth. In the lid opening/closing structure for a cassette recorder, the lid opening/closing structure includes a control plate that is engaged with the lid body and controls opening of the lid body, and the control plate is pivotally supported by the chassis at approximately the center shaft and is approximately orthogonal to the center line of the tooth portion. A lid opening/closing structure for a cassette recorder, characterized in that a retaining piece extends in the direction, and the engaging piece is engaged with a supporting piece of the lid.