JPS626570Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a horizontal balance device for a disc playback device, and in particular, the side opposite to the fixed side of the arm of a loop-shaped arm moving mechanism that is fixed to the arm and moves the arm itself in a straight line. and a balancer having approximately the same weight as the arm is attached at a position 180 degrees from the arm, and the balancer is moved in a direction opposite to the direction of movement of the arm. The present invention relates to a horizontal balance device for a disc playback device, characterized in that the horizontal balance device is moved in conjunction with the main performance device to maintain the horizontal balance of the main performance device.

Conventionally, in an arm that rotates with one-point support, the weight of the cartridge side and non-cartridge side is balanced around the fulcrum, so even if the arm rotates, there is no weight imbalance and the turntable remains level. I never lost it. However, if the arm part 3, in which the weight of the cartridge side and the non-cartridge side are balanced around such a fulcrum as shown in Fig. 1, is adopted in a linear system in which the arm part 3 itself moves in a straight line, the arm part 3 With the movement of the turntable 2, the horizontality of the turntable section 2 will not be disturbed in a direction perpendicular to the direction of movement, but the horizontality of the turntable section 2 will be greatly disturbed in the direction of movement due to weight imbalance. In addition, in FIG. 1, 1 is the main performance device,
6 is a pulley, 7 is an arm moving mechanism, and 9 is an external vibration absorber.

Conventionally, in order to maintain levelness, the strength of the external vibration absorbing device 9, such as a spring, was increased to absorb the weight imbalance caused by the movement of the arm section 3 itself. There was a problem that it became ineffective.

This invention was made by focusing on the problems of the conventional technology, and it is a loop-shaped arm moving mechanism that is fixed to an arm and moves the arm itself in a straight line. At the same time, a balancer having a weight that is approximately the same as the weight of the arm is attached at a position 180 degrees from the arm, and the balancer is moved in a direction opposite to the direction of movement of the arm. The purpose of this invention is to solve the above-mentioned problems by moving the parts in conjunction with each other.

This invention will be explained below based on the drawings. FIG. 2 is a perspective view showing an embodiment of this invention.

Reference numeral 1 denotes a main performance device, which consists of a turntable section 2 and an arm section 3. On the upper surface of the turntable section 2, there is a guide 4 on which the arm section 3 itself moves linearly, and an arm section moving mechanism located at both ends of the guide 4 that fixes the guide 4 and also serves as a stopper for the linear movement of the arm section 3. A support stand 5 is provided.

The arm portion moving mechanism support stand 5 has an L-shaped vertical section.
A guide 4 is fixed on the horizontal side, and a pulley 6 is vertically projected on the vertical side. A motor M for rotating a pulley 6 is fixed to one of the arm moving mechanism support stands 5.

Reference numeral 7 denotes an arm moving mechanism, which is a belt that is hung around both pulleys 6 and forms a vertical loop. The arm part 3 is fixed to the lower part of the arm part moving mechanism 7, and the balancer 8 is attached to the upper part, which is the side opposite to the lower part, which is the arm part fixed side.

The weight of the balancer 8 is approximately the same as the weight of the arm portion 3.

9 is an external vibration absorber, which is attached to the turntable section 2.
It is attached to the lower surface of the main performance device 1 to absorb external vibrations and maintain the levelness of the main performance device 1.

The relative arrangement of the arm portion 3 and the balancer 8 in the arm portion moving mechanism 7 is made to differ by 180°. That is, when the arm part 3 comes to the center position of the guide 4, the center position of the arm part 3 and the center position of the balancer 8 are determined to coincide. Therefore, when the arm section 3 is at the right end position 5R, the balancer 8 is located at the position where the arm section 3 is at the left end position 5L, and conversely, when the arm section 3 is at the left end position 5L, the balancer 8 is located at the position where the arm section 3 is at the left end position 5L. The portion 3 is positioned at the right end position 5R. By doing this, the arm portion 3
and the balancer 8 have the same weight and their moving directions are opposite to each other, so the increase in weight in the moving direction due to the movement of the arm part 3 is offset by the movement of the balancer 8, and the horizontality is always maintained. Ru. Note that when the arm section 3 and the balancer 8 are both at the center position of the guide 4, the external vibration absorbers 9 at both ends of the arm section 3 in the moving direction are adjusted so that the main performance device 1 is horizontal.

As explained above, this invention is a loop-shaped arm moving mechanism that is fixed to an arm and moves the arm itself in a straight line. By attaching a balancer of approximately the same weight as the weight of the arm at the position of ゜, and moving the balancer in a direction opposite to the direction of movement of the arm in conjunction with the movement of the arm, It is possible to prevent horizontality in the direction of movement due to weight imbalance caused by the movement of the arm, and to maintain the horizontal balance of the main performance device at all times, and it is necessary to absorb the weight imbalance caused by the movement of the arm with an external vibration absorption device. The effect is that the original role of the external vibration absorbing device can be more than fully demonstrated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the prior art, and FIG. 2 is a perspective view showing an embodiment of this invention. 1... Main performance device, 2... Turntable section,
3... Arm part, 4... Guide, 5... Arm part moving mechanism support base, 6... Pulley, 7... Arm part moving mechanism, 8... Balancer, 9... External vibration absorber.

Claims (1)

[Scope of utility model registration request] In a linear arm type disc playback device in which a main performance device consisting of a turntable part and an arm part is supported by a plurality of external vibration absorbers, and the arm part itself moves in a straight line a disc placed on the turntable part, A loop-shaped arm moving mechanism that is fixed to the arm and moves the arm itself in a straight line is provided with a loop-shaped arm moving mechanism that is opposite to the arm-fixed side, and is located at a position 180 degrees from the arm to accommodate the weight of the arm. A disk characterized in that a balancer having approximately the same weight is attached, and the balancer is moved in a direction opposite to the direction of movement of the arm section in conjunction with the movement of the arm section to maintain the horizontal balance of the main performance device. Horizontal balance device for playback equipment.