JPS624888Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tone arm used in a record player.

Conventionally, tonearms have been constructed from metal tubes such as aluminum pipes, but recently, in order to lower the natural frequency of the tonearm, foamed plastic or the like has been inserted into the tonearm pipe, or high-temperature metal tubes have been added to the outer periphery of the tonearm pipe. It is known that there are layers of rigid long fibers. However, with this method,
In addition to the tone arm pipe, foamed plastic or highly rigid long fibers are required, which has disadvantages such as increased cost.

Therefore, an object of the present invention is to provide a tone arm molded from a resin material in order to solve the above-mentioned drawbacks.

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

Figure 1 shows a double-sided printed circuit board in the form of a rectangle (dimension d).
FIG. 2 is a diagram showing the double-sided printed circuit board after cutting. In FIGS. 1 and 2, 1 is a printed circuit board on which a conductive pattern 2 as a lead wire is formed on at least one surface;
solder 3 to the lead wire made of this conductive pattern 2.
This is the lead wire connected at .

The printed circuit board 1, which is the base of the tone arm of the present invention, is formed by cutting a single board into strips as shown in FIG. In the case of commercial use, two conductive patterns 2 are formed on each side.

At this time, the substrate is not limited to a normal printed circuit board with little flexibility, but a flexible substrate may also be used.

In the present invention, the outer periphery of the printed circuit board 1 formed as described above is molded with transparent resin 5 to form an arm shape.

In FIG. 5, reference numeral 9 denotes a tone arm constructed according to the present invention, to which a counterweight 6, a cartridge 7, and a cartridge mounting portion 8 are attached.

In this manner, the tone arm of the present invention may be used in areas where metal pipes such as aluminum pipes have been used in the past. Furthermore, by using a flexible substrate, an S-shaped tone arm can be easily formed.

Since the present invention is constructed as described above, the transparent resin used as the molding material can prevent warpage and deformation of the printed circuit board, protect the conductive pattern surface from the outside, and furthermore make it possible to see the conductive pattern from the outside. This makes it easy to check whether the system is monaural or stereo. Further, by changing the resin material and the amount of molding, the rigidity of the tone arm can be set arbitrarily.

Furthermore, the design effect can be improved by applying a die-cutting process to the outer resin surface or by changing the type of transparent resin and changing the color of the tone arm.

[Brief explanation of the drawing]

Figure 1 is a diagram before cutting the printed circuit board into strips (dimension d), Figure 2 is a diagram showing the double-sided printed circuit board after cutting, Figure 3 is a diagram showing the resin body integrally molded, FIG. 4 is a diagram showing a double-sided printed circuit board cut by another method, and FIG. 5 is a diagram showing a tone arm according to the present invention. 1... Printed circuit board, 2... Conductive pattern, 5
...Transparent resin.

Claims (1)

[Scope of utility model registration request] A tone characterized in that the outer periphery of a printed circuit board on which a conductive pattern as a lead wire is formed on at least one surface is molded with transparent resin to form an arm shape so that the conductive pattern is protected and visible from the outside. arm.