JPS5916983Y2 - Vertical player - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vertically placed player which is a vertically placed player instead of a conventional horizontally placed player.

Conventional players are placed horizontally, and Figure 1 shows a vertically placed player.

In the figure, 1 is a turntable, 2 is a rotating shaft fixed at the center of the turntable 1, 3 is a stator of a motor provided near the rotating shaft 2 with the rotating shaft 2 as the center, and 4
5 is a rotor of a motor that rotates facing the stator 3 and rotates the rotating shaft 2; 5 is a bearing that rotatably supports the rotating shaft 2; and 6 is a casing of the motor.

When this conventional horizontally placed player is placed vertically, the following two problems occur.

That is, firstly, not only the weight W of the turntable 1 acts on the bearing 5, but also the weight W of the turntable 1,
Since a moment load Wx11 corresponding to the product of the distance 11 between the point of application of the weight and the center of the bearing 5 acts on the bearing 5, the shaft 2 and the bearing 5 are prevented from seizing in the areas shown in A and B in FIG. It is something that happens.

Second, the turntable 1 and rotating shaft 2 are removed in the direction of arrow C in FIG.

This idea was made to solve the above problems, and by providing a ring-shaped magnetic body on the back of the turntable at a position outside of the motor, and a permanent magnet that attracts this ring-shaped magnetic body. An object of the present invention is to provide a vertically placed player which can reduce the moment load acting on the bearing to prevent damage to the bearing, prevent the shaft from being pulled out, and which can easily be made compact.

An embodiment of this invention will be described below with reference to the drawings.

In Figure 2, 1 to 6 indicate the same things as in Figure 1, and 7
8 is an annular magnetic body provided around the rotating shaft 2 at a position close to the outer periphery of the back surface of the turntable 1 arranged in a vertical plane, and 8 is a disk-shaped mounting provided on the outer periphery of the motor housing 6. A plate 9 is a permanent magnet provided on the mounting plate 8 at a position opposite to the upper end portion 7a of the annular magnetic body 7 so as to attract the upper end portion 7a.

Next, the operation of this embodiment will be explained with reference to FIG.

Let us now assume that the weight of the turntable 1 is W, and that the attractive force applied to the upper end portion 7a of the annular magnetic body 7 by the permanent magnet 9 is F.

Further, if the distance between the point of application of the load W and the center of the bearing 5 is 11, and the distance between the center of the upper end portion 7a of the annular magnetic body 7 and the center of the rotating shaft 2 is 12, then the load applied from the bearing 5 to the rotating shaft 2 are radial load W1=W, moment load M=W11-
F12, thrust l-load F1=F.

Therefore, by selecting an appropriate value for F or 1□, the moment load M=Wl, -F12 applied to the rotating shaft 2 can be reduced to 0 or a small value, and damage to the shaft or bearing due to the moment load can be reduced. It can be prevented.

Furthermore, this magnetic attraction force F also acts to prevent the rotating shaft 2 from being pulled out.
This solution solves two problems at once.

Moreover, in this embodiment, the annular magnetic body 7 and the magnet 9 are mounted on the back side of the turntable 1 at a position outside the motor housing 6 by utilizing the space on the back side of the turntable 1. The dimensions can be reduced, and the entire device can be made smaller.

Although the mounting plate 8 is disk-shaped in the above embodiment, it may have any shape.

Further, in the above embodiment, the annular magnetic body 7 is provided near the outer periphery of the back surface of the turntable 1, but it may be provided inside the above embodiment as long as it is located outside of the motor on the back surface of the turntable 1. As described above, according to the vertically placed player of this invention, by providing an annular magnetic body at a position outside the motor on the back of the turntable, and by providing a permanent magnet that attracts this annular magnetic body, the moment applied to the bearing can be reduced. In addition to reducing the load and preventing damage to the bearings, the rotating shaft can also be prevented from coming out, and the width dimension can be reduced, making it possible to obtain a vertically placed player with the same structural space as a conventional horizontally placed player. There is.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional horizontally placed player placed vertically, Figure 2 is a sectional view of a vertically placed player according to an embodiment of this invention, and Figure 3 is a view of the rotation axis of the player shown in Figure 2. It is a figure which shows the load applied. 1... Turntable, 2... Rotating shaft, 3... Motor stator, 4... Motor rotor, 7...・Annular magnetic material, 9...
·permanent magnet. In the figures, the same symbols indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A turntable disposed in a vertical plane, a motor provided near the rotation axis of the turntable to rotate the turntable, and a position outside the motor on the back surface of the turntable. A vertically placed player comprising: an annular magnetic body provided around the rotating shaft; and a permanent magnet fixed opposite to the annular magnetic body to attract the annular magnetic body.