CN2378805Y - Improved turntable drive - Google Patents

Abstract

The utility model relates to a disc drive device. It has a driving disk, a driving shaft and a turntable, in which one side of the driving disk and turntable is equipped with a jack, and another side opposite to said jack is equipped with a convex bolt inserted into the jack. Therefore, when the driving disc stops, the gramophone disc and the gramophone record also stop immediately, and no slippery sound occurs.

Description

Improved turntable drive

The utility model relates to a disc driving device.

At present, as shown in FIG. 1 , the conventional turntable drive device 1 is located between the bottom of the turntable 2 and the turntable body 3 , and is roughly driven by a drive disc 10 and a drive unit that is fixed in the center of the drive disc 10 and driven by the drive disc 10 . The shaft 11 is composed of a hollow inner magnet 12 and an outer magnet 13 respectively fixed on the inner peripheral side and the outer peripheral side of the bottom surface of the driving disc 10, and a magnet controlled by the PC board 30 is arranged on the top of the phono body 3 below the driving disc 10. The excitation coil 31 can generate a magnetic moment by the magnetic field produced by the excitation coil 31 and the magnetism of the inner and outer magnets 12, 13, and drive the drive disk 10 and the drive shaft 11 that is fixed in the center of the drive disk 10 to rotate to achieve The purpose of driving the turntable 2 to rotate.

However, the above-mentioned turntable drive device 1 has the following disadvantages in actual use. According to the combination of the drive shaft 11 and the turntable 2 in the traditional turntable drive device 1, the drive shaft 11 is connected to the center hole of the turntable 2. The outer wall at the junction of 20 is fixedly connected with a shaft sleeve 14 whose outer diameter is gradually pushed down from top to bottom. Cooperate, also be push-and-pull shape, can closely fit with the push-and-pull surface of the outer wall of the shaft sleeve 14, from this we can see that the turntable 2 and the drive shaft 11 are connected in a socketed manner rather than in a fixed way, so when The driving device 1 is turned off and stopped after running for a period of time (that is, the state where the driving shaft 11 and the driving disc 10 both stop rotating), and the turntable 2 will get rid of the slot 20 and the sleeve by virtue of its rotational inertia (torque force) previously driven to rotate. 14, and continue to rotate a short distance (about 1/4 turn), so that the stylus will still read the record placed on the turntable 2, because the rotation speed of this small distance is not stable, and it is not What a DJ needs, a section of unnecessary and unpleasant portamento phenomenon will be produced, which violates the purpose of the record player to provide people with music enjoyment.

In view of this, the purpose of this utility model is to provide an improved turntable drive device, which can make the turntable and the drive plate lock together and move in unison. When the drive plate stops running, the turntable and the records on it will stop rotating immediately.

The purpose of this utility model is achieved in this way: an improved disc drive device has a drive disc, a drive disc fixed in the center of the drive disc and a disc that is socketed on the drive shaft with its central hole, wherein the drive disc The bottom surface is provided with a magnet, an exciting iron and an exciting coil, and the feature is that: one side of the driving disk and the turntable is provided with a jack, and the other side of the jack is provided with a protruding bolt that is inserted into the jack; the protruding bolt A soft pad is provided between the socket and the socket.

Due to the adoption of the above scheme: the turntable stops synchronously with the turntable driving device, and the portamento phenomenon does not occur.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a combined sectional view of a conventional driving device.

Fig. 2 combined sectional view of the first embodiment of the utility model.

Fig. 3 is a combined sectional view of the second embodiment of the utility model.

In the figure: 1 driving device, 2 turntable, 3 phono body, 4 driving machine, 11 driving shaft, 12 inner magnet, 13 outer magnet, 14 bushing, 20 center hole, 30 PC board, 31 excitation coil, 4 driving device, 40 drive disc, 41 magnet, 42 control circuit, 43 excitation coil, 44 drive shaft, 45 turntable, 46, 46A jack, 47, 47A convex bolt, 48, 48A soft pad.

As shown in Figure 2, the disc drive device 4 of the first embodiment also includes a drive disc 40, the inner and outer sides of the bottom surface are respectively provided with hollow magnets 41, and the magnet 41 is provided with a control circuit 42 (such as a PC board) below the magnet 41. Exciting coil 43, so that exciting coil and magnet 41 can generate magnetic moment to drive drive disc 40 to rotate, a drive shaft 44 is worn and fixed in the center of drive disc 40 to drive and rotate with drive disc 40, and a turntable 45 is used to carry The disc, whose central hole is sleeved on the drive shaft 44, is driven to rotate by the driver 44, and then drives the carried disc to be read by the stylus, and emits continuous musical tones.

In this embodiment, a jack 46 is set at the predetermined position of the drive disc 40, and a protruding bolt 47 protruding downwards at the position corresponding to the jack 46 on the bottom surface of the turntable 45 can be inserted into the jack 46, so that the turntable 45 and the drive disc The 40 phases are locked to achieve the purpose of making the turntable 45 and the drive disk 40 (driver 4) stop running synchronously, and have the effect of eliminating portamento.

In addition, in order to prevent the combination of the protruding bolt 47 and the socket 46 from causing torsion due to the rotation of the drive plate 40, the protruding bolt 47 and the socket 46 will produce a joint gap, and between the two places where the protruding bolt 46 is combined, a positioning system is used. There is a soft pad 48 to prevent clearance between the protruding bolt 47 and the socket 46, and to prevent undue noise from being produced.

As shown in Figure 3, in the second embodiment, a jack 46A can also be provided at the predetermined position of the turntable 45, and the driving disc 40 facing the jack 46A protrudes upwards and can be plugged and combined with the jack 46A. The convex bolt 47A, and the convex bolt 47A protrudes from the top surface of the turntable 45, so that the turntable 45 and the driving disk 40 have a linkage effect, so as to have the function of synchronous movement; Clearance, be fastened on the top of protruding bolt 47A and socket a soft pad 48A, so that there will be no clearance and collision noise between the two.

In this embodiment, when the driving disc 40 is forced to stop moving by the engagement between the disc 45 and the drive disc 40 (the protruding bolt 47 and the jack 46, or the protruding pin 47A and the jack 46A), the disc 45 also stops rotating thereupon, achieving There is no purpose for the portamento phenomenon to occur when the record playback is stopped.

Claims (2)

1. An improved turntable drive device has a drive disk, a drive disk fixed in the center of the drive disk and a turntable that is sleeved on the drive shaft with its central hole, wherein the bottom surface of the drive disk is provided with magnets, exciters and The exciting coil is characterized in that: one side of the driving disc and the turntable is provided with a jack, and the other side of the jack is provided with a protruding bolt inserted into the jack. 2. The improved turntable drive device according to claim 1, characterized in that: a soft pad is provided between the protrusion and the socket.

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