JPS6016401A - High voltage variable resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-voltage variable resistor, and its purpose is to easily connect the terminal pin and the insulating case by integrating the insulating tube of the terminal pin and the lid of the insulating case. A high-voltage variable resistor that can be positioned, can be bonded to the insulating substrate, fixed to the insulated tube, and bonded to the insulated case at the same time, is simple in configuration, prevents dust from entering the interior, and maintains high reliability and safety. That's what you're trying to get.

Conventionally, in this type of resistor, an insulating substrate 15 with terminal pins 14 attached in advance is inserted into an insulating case 16 and bonded, and after hardening, a single insulating tube 17 is inserted into the terminal pin 14, and the insulating tube 17 and the terminal pin 14 are connected. The molding resin 18 such as epoxy resin is poured into the insulating case 16 in a vacuum or under normal pressure, and is cured after degassing to fix the insulating cylinder 17. It maintained high reliability and safety under high pressure. However, with such a configuration, not only does the total cost of parts for the insulating tube 17 as a single item during production and the casting process to maintain high reliability and safety due to high pressure increase, but also the total cost of the insulating tube 17 increases. 17 is cast with casting resin 18, it is necessary to bond and harden between the insulating case θ and the insulating board 15 with terminal pins in advance with adhesive resin 18, and the terminal pins 14 Surrounding insulation cylinder 17 Which air gap 2
It is difficult to maintain a constant value of 0, and it is extremely difficult to position a large number of terminals B/14.

The present invention eliminates the drawbacks of conventional products as described above.
The configuration will be explained according to the drawings shown as an example.

Reference numeral 1 denotes an insulating case, which has a through hole at the bottom, through which a rotary shaft 3 of a brush 2 having spring properties passes through in a rotatable and airtight manner. Reference numeral 4 denotes an insulating substrate, on the surface of which a variable resistance section 5 and a fixed resistance section 6 are formed, electrodes 7 are provided at both poles of each resistor and the current collecting electrode of the variable resistor, and terminal pins 8 are provided.
A terminal pin 8 is soldered through the fixing hole 9.

Reference numeral 10 denotes an adhesive made of silicone resin, epoxy resin, etc., which is applied to the periphery of the insulating substrate 4 after the terminal pins have been removed by a screen printing method or other suitable method. The insulating substrate 4 is tightly attached to the stepped portion of the inner surface of the insulating case l using the adhesive 10. The variable resistance section 5 of the insulating substrate 4 and the current collecting electrode are electrically connected by the brush 2.

Reference numeral 11 denotes an insulating case lid integrally formed with an insulating cylinder 12. After applying adhesive resin 13 to the entire bottom surface of the insulating cylinder 12, the insulating case l is inserted and fitted into the lid to complete the above-mentioned insulation. The board 4 and the insulating case 1 are brought into close contact. At this time, the predetermined position of the insulating substrate 4 is fixed by simply fitting the insulating case cover 11 while slightly adjusting the gap a between the provided terminal pin 8 and the insulating cylinder 12. The insulating substrate 4, the insulating case 1, and the insulating case ill can be hardened by pressing the insulating substrate 4, the insulating case 1, and the insulating case ill together using a suitable method such as a clip against brush pressure.

Since the present invention has the configuration as described in section 2, it is possible to easily position the terminal pin and the insulating tube, it is possible to bond the insulating substrate, fix the insulating tube, and bond the insulating case at the same time, and it is possible to bond the bottom surface of the insulating tube. By adhering with resin, electrical insulation between the terminals is also ensured. Further, it has practical effects such as being able to provide a product with high reliability and safety at a low cost without fear of dust intrusion into the interior.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a high voltage variable resistor according to the present invention, FIG. 2 is a plan view of an insulating substrate used in the product of the present invention, and FIG. 3 is a sectional view of a conventional product. ■... Insulating case 4... Insulating board 8... Terminal pin 10... Adhesive line 112... Insulating tube 13...
Adhesive Resin Agent Patent Attorney Oshima - Public Affairs Figure 1 Figure 2

Claims (1)

[Claims] (1) Inside the insulating case that rotatably and airtightly penetrates the brush rotating shaft, there is at least a variable resistance skin j1 on the negative side. An insulating substrate having a circuit including the circuit and a plurality of terminal pins is inserted and tightly bonded with adhesive, and an insulating tube is integrally formed with the insulating case lid to pass through the terminal pins with a certain gap between them. A high-voltage variable resistor in which an insulating case lid is fitted, the insulating cylinder and the insulating substrate are bonded with resin, and a sealed space insulated from air with resin is formed in the insulating case.