JPS5812405Y2 - small variable resistor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small variable resistor and relates to a terminal mounting structure.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

First, in the figure, 1 is made of insulating material and has a hole 1a in the center.
A resistor 2 made of cermet is provided around the hole 1a on the surface of the substrate 1.

A silver terminal 3 made of a conductive material is provided at one end of the resistor 2, and an extension portion 3a of the silver terminal 3 extends to the back surface of the substrate 1 through the side surface 1b of the substrate 1.

4 is a slider made of a conductive metal material with spring properties;
The slider 4 is attached to the surface of the substrate 1 by means of a metal shaft 5 inserted into the hole 1a of the substrate 1 through a donut-shaped seat plate 6 so as to be rotatable together.

The metal shaft 5 has a groove 5a for driver adjustment at the tip on the back side of the substrate 1, and 5b is a caulked portion at the tip on the front side of the substrate 1.

As described above, the slider 4 rotates together with the metal shaft 5, and the contact portion 4a at the tip slides on the resistor 2 and the silver terminal 3 to obtain an arbitrary resistance value.

7 is an extension 3 of the silver terminal 3 provided on the back surface of the substrate 1.
The first terminal maintains electrical contact with a, and has a hook part 7a at the tip for stable contact.The hook part 7a is inserted into the metal shaft 5 and is attached to the back side of the board 1 by the fixing claw 7b. installed.

In order to insulate the first terminal 7 from the metal shaft 5, the diameter of the hook portion 7a is larger than the shaft diameter of the metal shaft 5.

A second terminal 8 maintains electrical continuity with the slider 4 via the metal shaft 5, and has a hook portion 8a at the tip for stable contact, and the metal shaft 5 is connected to the hook portion 8a. It is inserted through and has a claw 8b in part for fixing to the substrate 1.

An insulating plate 9 is attached to the outer periphery of the metal shaft 5 between the first terminal 7 and the second terminal 8 in order to electrically insulate them, and is made of a highly heat-resistant insulating material.

Here, to briefly explain the assembly order (÷), insert the second terminal 8, insulating plate 9, first terminal 7, board 1, seat plate 6 and slider 4 into the metal shaft 5 in this order, and It is assembled by caulking the tip caulking portion 5b of the shaft 5.

The present invention is constructed as described above, and the first
．． Since the second terminal is configured to be attached by inserting it into the metal shaft, it has the advantage of being extremely easy to assemble and manufacture, and accordingly, it is possible to provide a product with stable quality.

[Brief explanation of the drawing]

Fig. 1 is a top view showing an embodiment of a small variable resistor according to the present invention, Fig. 2 is a sectional view of the same, and Fig. 3 is a top view and a bottom view of a board constituting the variable resistor. , Fig. 4 is a perspective view of the slider, Fig. 5 is a perspective view of the first terminal, and Fig. 6 is a perspective view of the slider.
This figure is a perspective view of the second terminal, and FIG. 7 is a front view of the same metal shaft. 1... Board, 1a... Hole, 2...
...Resistor, 3... Chain terminal, 4... Slider, 5... Rotating shaft, 6... Seat plate, 7
...First terminal, 8...Second terminal, 9.
...Insulating board.

Claims (1)

[Scope of utility model registration request] A substrate made of an insulating material with a hole in the center, a resistor provided around the hole on the front surface of this substrate, and a part of the resistor connected to one end extending to the back surface of the substrate. a silver terminal, a slider that is rotatably attached to the front side of the board via a metal shaft inserted into a hole in the board via a seat plate and slides on the resistor, and a slider that slides on the resistor; and a slider that slides on the resistor; (d) A first terminal that maintains electrical continuity with the extension of the silver terminal, and an insulating plate interposed between the first terminal and the metal shaft that is electrically connected to the slider. The second terminal maintains continuity, and the first terminal. A small variable resistor having a second terminal inserted into the metal shaft on the back side of the substrate.