JPS6241401Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a disc clamp mechanism that securely clamps a disc record.

Conventionally, a disc player that plays back information by rotating a disc record at high speed has the center hole of the disc record attached to a guide boss, and a fixing cap fitted to the head of the guide boss to fix the disc record to the guide boss. A disk clamp mechanism is used in which the disk is clamped by a cap, but such a conventional mechanism not only has a complicated structure, but also
If the fixing cap is fitted manually, the operation becomes troublesome.

Therefore, we would like to propose a disc clamping mechanism that clamps a disc record simply by attaching the center hole of the disc record to a guide post.

The present invention will be described below with reference to an illustrative embodiment. As shown in the figure, in conjunction with the mounting of the disc record, the plurality of fixed levers are moved 90 degrees from the retracted position in the guide boss shown in Fig. 2 to the pressed position on the disc record shown in Fig. 3. It clamps the disc record by rotating it.

As shown in exploded view in FIG. 1, the structural members of this embodiment include a guide boss 1 having eight radial grooves 1a formed at equal angular intervals and a ring mounting groove 1b formed on the outer periphery; Pressing piece 2a... and adsorption piece 2b...
are formed at both ends, and engaging protrusions 2d are formed near the through holes 2c, and fixed levers 2 made of magnetic material are arranged in the cut grooves 1a (only two are shown in FIG. 1). and a C-shaped ring 3 that pivotally supports the fixed lever 2 and fits into the ring mounting groove 1b.
The fixed lever 2 is fixed within the guide boss 1.
A second magnet 4 (see Fig. 3) that attracts ... to the pressed position, and a first magnet 5 (see Fig. 2) that attracts the fixed lever 2 fixed in the guide boss 1 to the retracted position. ) and the kerf 1a...
A centering hub 6 that fits into the guide boss 1 with claw pieces 6a inside, and a centering hub 6 that is in contact with a flange 6b of the centering hub 6.
A rotary holder 7 that prevents the centering hub 6 from coming off, a spring 8 that biases the centering hub 6 upward in the rotary holder 7, and a spring 8 that urges the centering hub 6 upward in the rotary holder 7, although not shown in FIG. It consists of a rotating shaft 9 that rotates in a fixed manner.

When assembling the mechanism of this embodiment, first, the ring-shaped magnets 4 and 5 are adhesively fixed to the inside of the guide boss 1, and the C-shaped ring 3, which pivotally supports the eight fixing levers 2, is inserted into the ring mounting groove 1c. and a fixing lever 2 is arranged inside each groove 1a. Next, with the rotary shaft 9 fixed to the guide boss 1 and the coiled spring 8 and centering hub 6 attached, the two-split rotary holder 7 is adhesively fixed to the rotary shaft 9 to complete the assembly.

In the device of this embodiment before the disk record D is installed, the fixed lever 2 is in the retracted position where it is attracted by the first magnet 4 and stands up without protruding from the outer periphery of the guide boss 1, and the centering hub 6 is also in the spring state. It is in the locking position pushed up by 8. When the disc record D is mounted in this state, the centering hub 6 inscribed in the center hole of the disc record D descends, and its claws 6a engage with the engagement protrusions 2d of the fixed lever 2, causing the fixed lever 2... Rotate to the pressed position. The rotated fixed lever 2... moves the adsorption piece 2b... to the second magnet 5.
The pressing pieces 2a are attracted to the upper surface of the disc record D, and
The disc record D is reliably held by its own weight and the adsorption force of the second magnet 5. Incidentally, the disc record D can be removed by simply lifting the disc record D against the urging force of the pressing piece 2a, and the mechanism of this embodiment can be easily attached and detached.

As described above, the present invention adds a simple structure to link the mounting of the disc record with the clamp, so the operation is simple and the effect is great.

[Brief explanation of the drawing]

Each figure shows one embodiment of the mechanism of the present invention.
The figure shows an exploded perspective view, FIG. 2 shows a sectional view before the disc record is installed, and FIG. 3 shows a sectional view after the disc record is installed. Explanation of main drawing numbers, 1... Guide boss, 2... Fixed lever, 4... First magnet, 5... Second
magnet, 6...centering hub, 8...
Spring, 9...Rotating shaft.

Claims (1)

[Scope of utility model registration request] a guide boss that is fixed to the rotating shaft by forming a plurality of radial grooves; a plurality of fixed levers that are pivotally supported within the grooves; The fixing lever is moved to the disc by a first magnet that attracts the disc record to a retracted position where it does not protrude further, and a plurality of claws formed on the inner periphery as the disc record, which is arranged on the outer periphery of the guide boss and circumscribes, descends. A centering hub that rotates to a pressed position on the top surface of the record, a spring that biases the centering hub up and down, and a second magnet that is disposed within the guide post and attracts the fixed lever to the pressed position are arranged. Disc clamp mechanism consisting of.