JPH0222801Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in tone arm devices.

Conventional tone arm devices are equipped with an arm height adjustment mechanism, but because they are not equipped with a tilt indicating mechanism, the horizontal balance of the tone arm is determined by visual measurement. As a result, a tracking error occurs between the record sound groove and the pickup, resulting in the disadvantage that the recorded signal cannot be faithfully reproduced.

The present invention improves on these conventional drawbacks, and will be explained below with reference to the drawings.

In the figure, 2 is the tone arm, and its base 3
A pair of arm portions 4, 5, which protrude in the horizontal direction.
Cylindrical support parts 8a and 8b integrally connected to 6 and 7
are provided symmetrically and facing each other, and on the other hand, a pair of cylindrical bearing parts 1a and 1b are provided facing each other at both ends of the bearing body 1. The base portion 3 of the tone arm 2 is positioned between the bearing portions 1a and 1b of the bearing body 1, and the bearing portions 1a and 1b and the support portions 8a and 8b are opposed to each other and are rotatably supported. A scale 9 is provided on one or both cylindrical surfaces of parts 1a and 1b,
It has a structure in which indicator lines 10 are respectively provided on the cylindrical surfaces of one or both of the support parts 8a and 8b facing the bearing part.

According to the above structure, when the tone arm 2 rotates in the vertical direction, the instruction lines 1 of the supporting parts 8a and 8b
Since the numbers 0 and 10 move along the scales 9 of the bearings 1a and 1b, the inclination of the tone arm 2 can be clearly determined. Therefore, the inclination of the tone arm 2 can be adjusted accurately without relying on visual measurement as in the past.

As described above, the present invention uses the bearing and support part of the tone arm device and provides a tilt indicating mechanism in this part, so that the tilt of the tone arm can be clearly determined at a glance, and the tilt can be adjusted accurately. It also has the advantage of being extremely simple in structure.

[Brief explanation of the drawing]

The figure shows the main structure of the tone arm device of the present invention. 1 is a bearing body, 1a and 1b are bearing parts, 2 is a tone arm, 3 is a base, 4, 5, 6, and 7 are arm parts, 8a and 8b are support parts, 9 is a scale, and 10 is an indicator line.

Claims (1)

[Scope of utility model registration request] A bearing main body 1 in which a pair of cylindrical bearing parts 1a and 1b are formed facing each other, and a cylindrical support part integrally connected to a pair of arm parts 4, 5, 6, and 7 that protrude horizontally from a base 3. The base 3 of the tone arm 2 is connected to the bearing portions 1a and 8b of the bearing body 1, and the tone arm 2 has two tone arms 8a and 8b arranged symmetrically opposite to each other.
1b, and the supporting parts 8a and 8b are rotatably supported by the bearing parts 1a and 1b, respectively, facing each other, and an indicator line 10 is provided on the cylindrical surface of one or both of the supporting parts 8a and 8b. A tone arm device characterized in that a scale 9 is provided on the cylindrical surface of one or both of the bearing parts 1a, 1b facing the support part.