JPS5822250Y2 - Record player turntable touch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turntable device for a belt drive of a record player.

Conventional turntable devices for belt-drive record players include those in which the turntable section, pulley section, gears and pawls that control the operation of the automatic performance device are integrated by die-casting, and those in which the turntable and pulley sections are made of die-casting. There are models in which the gear part is molded separately from resin, and models in which the turntable part, pulley part, and gear part are made separately, but the first and second turntable devices are of high quality. The third type had drawbacks such as difficulty in achieving rotational accuracy of the pulley gear part during assembly.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a turntable device for a record player that is inexpensive and has good performance.

In order to achieve the object of the present invention, the record mounting section, pulley section, and gear section of the turntable are separated, and the pulley section and the gear section are integrally molded with resin.

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, 1 is a shaft, 2 is a bush, 3 is a resin-molded pulley, which includes a gear portion 3a, a pulley portion 3b for tensioning the belt, a plurality of boss portions 3c on the same circumference,
The shaft 1 is press-fitted into the inserted bush 2, which has a claw portion 3d, and the center spindle 4 is press-fitted into the top of the shaft 1.

The gear portion 3a and the pawl portion 3d are the operation control portion of the automatic performance device, and the pawl portion 3d is not shown in FIG.
It detects the end of the record and starts the operation, and the gear part 3a
acts to provide driving force to the automatic return device.

5 is an aluminum drawn turntable with boss part 3c
It has a plurality of holes 5a at positions facing the pulley 3, and is fixed to the pulley 3 with screws 6 to form a turntable device.

Instead of the screw 60, a pin portion 3f may be formed instead of the mold boss portion as shown in FIG. 2, and after the turntable 5 is attached, it may be welded.

In this way, in the present invention, the gear part and the pulley part are integrally molded with resin, so the turntable can be drawn from an aluminum plate, and is therefore cheaper than an aluminum die-cast turntable.

The weight of the entire turntable in the housing can be reduced, the load on the bearings can be reduced, and the starting characteristics are also good, and performance with rotational unevenness comparable to that of a die-cast turntable can be obtained.

Furthermore, for specifications with different turntable outer diameters,
Other parts can be shared, and even if the external part of the turntable is damaged during the manufacturing process, it is easy to replace and can be easily replaced, which is a great advantage.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view showing one embodiment of a turntable device for a record player according to the present invention, and FIG. 2 is a sectional side view of another embodiment. 1... Shaft, 3... Pulley, 3b... Pulley part, 5... Turntable, 5a... Multiple holes.

Claims (1)

[Scope of utility model registration request] A turntable made of an aluminum plate having a plurality of holes, and another turntable integrally molded with resin and having a belt drive pulley part, a gear part for an automatic performance device, and a connection part between the pawl part and the hole of the turntable. A turntable device for a record player, comprising a table.