JPH0565955B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a locking mechanism for locking a playback mechanism section of a vehicle-mounted CD player to a mechanical chassis except during playback.

[Summary of the Invention] A lock shaft of a regeneration mechanism is held between a lock arm driven by a swing plate and a slide plate, and is locked to a mechanical chassis, and the lock arm and slide plate are unlocked in the locked position. The force acts on the rocking plate substantially obliquely with respect to the tangential direction thereof, and the driving force acts substantially in the tangential direction of the rocking plate when the rocking plate moves the lock arm and the slide plate. This is a locking mechanism for in-vehicle CD players, and is characterized by its reliable operation and ability to be driven with relatively little force.

[Conventional technology]

Conventionally, in car-mounted CD players, in order to avoid the effects of car vibrations, the playback mechanism consisting of a turntable, clamper, pick-up, etc. is swingably supported on a mechanical chassis via a spring and damper. The regeneration mechanism is locked to the mechanical chassis by a lock mechanism at other times than during playback, and is unlocked only during playback to allow rocking. However, the strong vibrations of the car exert a large force on the lock mechanism and its drive mechanism, making the operation unstable and requiring the use of a motor with a high rating.

[Problems to be solved by the invention]

An object of the present invention is to improve the drawbacks of the conventional devices described above, and to provide a locking mechanism for a vehicle-mounted CD player that is reliable in operation and can be driven with a relatively small force.

[Means to solve the problem]

In order to achieve the above object, the present invention
The locking mechanism of a CD player includes a swinging plate provided on a mechanical chassis that rotates between a lock position and a release position, and a lock arm and a slide plate that are driven by the swinging plate and move in different directions. A direction in which the regeneration mechanism is locked to the mechanical chassis by sandwiching the lock shaft of the regeneration mechanism supported by a spring and a damper between a lock arm and a slide plate, and the lock arm and slide plate are unlocked at the locked position. The force acts on the rocking plate substantially obliquely to its tangential direction, and the driving force acts substantially tangentially to the rocking plate when the rocking plate moves the lock arm and the slide plate. ing.

【Example】

Embodiments of the invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a mechanical chassis with the loading mechanism and locking mechanism omitted. FIGS. 2 to 4 are right side views of the mechanical chassis showing the operation of the locking mechanism, and show the rocking plate in the locked position, intermediate position, and release position, respectively. A regeneration mechanism section 2 is swingably supported by a mechanical chassis 1 via a spring and a damper. In the reproduction mechanism section 2, a turntable, a clamper, a pickup, etc. are arranged in a well-known manner. In addition, lock shafts 2a are protruded from both sides of the regeneration mechanism section 2, and as shown in FIG.
This lock shaft 2a is loosely inserted into a through hole 1a formed in the side surface of the mechanical chassis 1. A swing plate 3 and a lock arm 4 are rotatably supported on the side surface of the mechanical chassis 1, and
A slide plate 5 is supported so as to be slidable in the front-rear direction (left-right direction in the figure). The swing plate 3 is driven by a lowering guide arm 6 which controls the movement of the clamper, and is pivoted between the locked position shown in FIG. 2 and the released position shown in FIG. A pin 4a of the lock arm 4 engages with a substantially L-shaped cam hole 3a formed in the swing plate 3.
As a result, the rotation of the swing plate 3 causes the lock arm 4 to rotate between the lock position and the release position. Further, the slide plate 5 is formed with an engaging portion 5a and an arcuate portion 5b continuous thereto, and when the drive pin 3b of the swing plate 3 engages with the engagement portion 5a, the swing plate 3 slides when rotated. The plate 5 moves between a front locking position and a rearward release position. A through hole 5c is formed in the slide plate 5, which almost overlaps with the through hole 1a of the mechanical chassis 1 in the released position shown in FIG. It is penetrated. Further, a holding portion 5d is formed continuously at the front end (left end in the figure) of the through hole 5c, and when the slide plate 5 is in the lock position, the regeneration mechanism portion 2
The lock shaft 2a is engaged here. Next, its operation will be explained. In the locked position shown in FIG. 2, the lock shaft 2a of the regeneration mechanism section 2 is held between the lock arm 4 and the slide plate 5 and fitted into the holding section 5d, so that the regeneration mechanism section 2 is locked to the mechanical chassis 1. At this time, the clockwise rotational force that releases the lock of the lock arm 4, that is, the force that moves the pin 4a upward, acts on the swing plate 3 substantially obliquely with respect to the tangential direction thereof, and also acts on the slide plate 5 The force directed forward (to the left in the figure) that releases the lock acts on the swing plate 3 from the circular arc portion 5b via the drive pin 3b substantially obliquely to the tangential direction of the swing plate 3. Swing plate 3
The component force that rotates the regeneration mechanism 2 is extremely small, and even if the car vibrates violently (as the oscillation plate 3 rotates), there is no risk that the regeneration mechanism section 2 will be unlocked. When the disk is inserted, the clamper is lowered, and the swing plate 3 is rotated counterclockwise, the lock arm 4 and slide plate 5 do not move from FIG. 2 to FIG. 3, and from FIG. 3 to FIG. By the final rotation of the swing plate 3 shown in FIG. 4, the lock arm 4 and slide plate 5 are moved to release the lock on the playback mechanism section 2. At this time,
Since the driving force acting from the swinging plate 3 on the lock arm 4 and the slide plate 5 is directed substantially in the tangential direction of the swinging plate 3, the lock can be released with a relatively small driving force. Conversely, when the playback mechanism section 2 is to be locked, the operation described above is completely reversed. Even in that case, the driving force acting from the swing plate 3 on the lock arm 4 and the slide plate 5 is simply reversed in direction and is oriented almost tangentially to the swing plate 3, so that the lock can be achieved with a relatively small driving force. be able to.

【Effect of the invention】

As explained above, the locking mechanism of the in-vehicle CD player of the present invention can operate reliably without fear of unlocking even if a large force is applied to the playback mechanism, and can be driven with a relatively small force. This has the effect that the mechanism and drive motor can be made smaller.

[Brief explanation of drawings]

Fig. 1: A schematic perspective view of a mechanical chassis to which a locking mechanism according to an embodiment of the invention is attached; Fig. 2: A side view showing the rocking plate of the locking mechanism in the locked position; Fig. 3: in an intermediate position. A side view showing the state, FIG. 4...A side view showing the state in the release position, 1... Mechanical chassis, 2... Regeneration mechanism section, 3...
... Swinging plate, 4... Lock arm, 5... Slide plate, 6... Lowering guide arm.

Claims (1)

[Claims] 1 A mechanical chassis is provided with a swing plate that rotates between a lock position and a release position, and a lock arm and a slide plate that are driven by the swing plate and move in different directions. By holding the lock shaft of the regeneration mechanism supported by the lock arm and slide plate, the regeneration mechanism is locked to the mechanical chassis, and at the locked position, a force is applied to the rocking plate in the direction of unlocking the lock arm and slide plate. For automotive use, the rocking plate acts substantially in a tangential direction with respect to the tangential direction thereof, and when the rocking plate moves the lock arm and the slide plate, the driving force acts substantially in the tangential direction of the rocking plate.
CD player lock mechanism.