JPS6231002A - Pickup arm device - Google Patents

Abstract

PURPOSE:To suppress the backlash of an arm body, to eliminate unnecessary resonance, and to improve the precision of the position of a stylus tip by providing the arm body with an elastic body which presses an inner ring in one direction. CONSTITUTION:The leaf spring 7 fitted to the arm body 2 presses a lateral shaft 4 as shown by (c). A cartridge 1 is moved over a record surface smoothly in a vertically and a horizontally direction and the leaf spring 7 presses the shaft 4 as shown by (c), so the inner ring 3 pressed in the lateral shaft 4 is also pressed as shown by (c) against the side wall on one side of the arm body 2, so that there is no play due to clearance. Thus, the play of the arm body 2 is prevented to eliminate unnecessary resonance and the precision of the stylus tip position is improved, so that the pickup arm device is usable for a music selection type player.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bearing structure for a pickup arm device.

2. Description of the Related Art In recent years, in order to reduce costs in low-priced record players, the structure of the bearing part of the pickup arm has changed to 1.
I was able to replace it with something fairly simple.

A conventional pickup arm device will be explained below.

FIG. 2 is a configuration diagram of a conventional pickup arm device. 1 is a cartridge, 2 is an arm body that holds the cartridge, 3 is an inner ring, and 4 is a horizontal shaft, which is press-fitted into the inner ring 3 and is attached to the arm body. It is supported by bearings installed on the sides. 5 is press-fitted into the inner ring 3 with its vertical axis, and is supported by upper and lower bearings provided on the pedestal 6.

The operation of the pickup arm device configured as described above will be explained below.

First, the T-arm body 2 is supported by the horizontal shaft 4 press-fitted into the inner ring 3 and freely rotates in the direction a. The vertical shaft 5 and the inner ring 3 rotate while being supported by the frame 6.
A horizontal shaft 4 is also press-fitted into the inner ring 3 and exerts force so that the arm body 2 can freely rotate in the direction b.

In other words, in order to play a record, it is necessary for the power cartridge to move smoothly in the vertical and horizontal directions with respect to the record surface, but by equipping the arm body with the bearing configuration described above, By simply attaching the cartridge to the arm body, the cartridge can be moved freely.

Problems to be Solved by the Invention However, in the conventional configuration described above, there is a slight clearance between the inner ring and the arm body, and a clearance between the horizontal axis and the arm body, which causes the arm body to wobble with respect to the mount. This may cause the positional accuracy of the cartridge stylus tip relative to the stand to become inaccurate (-), making it unusable for music selection type players that require high positional accuracy, or unnecessary resonance due to backlash may occur.
It had problems such as distorted sound and needle skipping when played.

The present invention solves the above-mentioned conventional problems, and provides a pickup arm device that suppresses rattling of the arm body, eliminates unnecessary resonance, improves the accuracy of the needle tip position, and can be used for music selection type players. The purpose is to

Means for Solving the Problems To achieve this object, the pickup arm device of the present invention includes an elastic body on the arm body for pressing the inner ring in one direction.

Effect: With this configuration, the inner ring is reliably pressed against the arm body in one direction, and rattling due to clearance does not occur, so unnecessary resonance can be prevented and the accuracy of the needle tip position can be improved.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a pickup arm device according to an embodiment of the present invention. In Figure 1, the second
Parts that function in the same way as in the figures are given the same numbers and their explanations are omitted.

Reference numeral 7 denotes a leaf spring attached to the arm body 2, which presses the horizontal shaft 4 in the direction of C.

The operation of the pickup arm device of this embodiment configured as described above will be described below.

In this embodiment as well, as in the conventional example, the cartridge can be smoothly moved vertically and horizontally with respect to the record surface without resistance. Furthermore, since the leaf spring is pressing the horizontal shaft 4 in the direction C, the inner ring 3 press-fitted into the horizontal shaft 4 is also pushed in the direction 4C and pressed against the side wall of one side of the arm body 2. , rattling due to clearance will no longer occur.

As described above, according to this embodiment, by simply attaching a simple elastic body called the leaf spring 7 to the arm body 2, it is possible to prevent the arm body 2 from wobbling due to the clearance, and the purpose can be achieved at low cost. It is possible to do so. By preventing the arm body 2 from wobbling, unnecessary resonance is eliminated and the accuracy of the needle tip position is increased, making it usable for music selection type players.

In this embodiment, the elastic body is a plate spring, but the elastic body may be a wire spring, a wound spring, or rubber.

Effects of the Invention The present invention provides the arm body with an elastic body.
Reduces rattling of the arm body and eliminates unnecessary resonance.
It is possible to realize an excellent pickup arm device that improves the accuracy of the needle tip position and can be used for music selection type players.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a pickup arm device according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a conventional pickup arm device. 1...Cartridge, 2...Arm body, 3...Inner ring, 4...Horizontal axis, 5...Vertical axis, 6 ...... mount, 7...
...Plate spring.

Claims (1)

[Claims] A cartridge that picks up signals recorded on a record, an arm body that holds the cartridge and gives the cartridge horizontal and vertical movement relative to the record.
With the arm body as a bearing, there is a supported horizontal shaft, an inner ring that holds the horizontal shaft, a vertical shaft that is supported by the inner ring, a frame that supports the vertical shaft, and a frame that is attached to the arm body and is aligned with the horizontal shaft. A pickup arm device characterized by comprising an elastic body that applies a directional force.