JPS5836110Y2 - sealed relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed relay, and particularly to an improvement in a sealed relay in which desired electronic components are additionally connected to the relay body and the relay body and electronic components are sealed within a case.

Conventionally, in the sealed relay, the relay body is electrically connected to a desired number of terminals attached through a base made of an electrically insulating material, and the relay body is mounted on one surface of the base. A desired electronic component forming an overvoltage protection circuit, etc., such as a semiconductor diode, a resistor, a capacitor, etc., is electrically connected to the main body of the relay, and the periphery of the base and the inner periphery of the opening of the case are connected. The relay main body and desired electronic components are sealed inside the case by filling the joint with a sealing material, such as an adhesive synthetic resin material.

However, the sealed relays are often used in adverse environments such as high temperatures, and are likely to accumulate heat inside them.

For this reason, electronic components that are additionally connected to the relay body, especially
There was a problem that semiconductor parts etc. were easily deteriorated.

In addition, the relay body is often subjected to vibration due to the operation of the main body and the operation of external mechanical devices, and there is a risk that the electronic components may cause short-circuit accidents or poor contact, resulting in reliability problems.

The present invention has been developed to solve the above-mentioned problems, and is particularly applicable to molds of electronic components in which a sealing material filled in the joint between the case and the base is added to the main body of the relay as desired. It was designed to also be used as a
The purpose of the present invention is to provide a sealed relay that can prolong the life of electronic components, prevent short-circuit accidents, poor contact accidents, etc., and has high reliability and equipment.

Next, the present invention will be explained with reference to the accompanying drawings, which are one embodiment.

In FIG. 1, reference numeral 1 denotes a rectangular case, and the peripheral surface 4 of a rectangular plate-shaped base 3 made of electrically insulating material is joined to the inner peripheral surface 2 of the side wall near the opening of the case 1, and the outer surface 3a of the base 3 and A recess 5 having a desired depth is formed by the inner circumferential surface 2 of the case.

Reference numeral 6 denotes electrical connection terminals that extend vertically through the base 3 (nine terminals are shown in the figure). ) is electrically connected to the terminal.

8 is a desired electronic component 10, for example, the relay main body 7
The base 3 is a printed circuit board in which semiconductor diodes, resistors, capacitors, etc. forming electronic circuits for overvoltage protection are attached to the circuit pattern 8a (conductive metal film surface) by soldering. An insertion hole 9 is provided so that the terminal 6 attached to the base 3 can be inserted therethrough and brought into close contact with the end surface of the base 3.

Further, the printed wiring board 8 has a circuit pattern 8
It is shaped so that it can be stored in the recess 5 of the case 1, with its circumferential surface 8b substantially in close contact with the inner circumferential surface 2 of the case 1, with the side a facing outward.

As shown in FIG. 2, after the printed wiring board 8 is housed in the recess 5 of the case 1 as described above, the circuit pattern 8a is aligned with a desired one of the terminals 6 inserted through each insertion hole 9. The terminal 6 is electrically connected and fixed by soldering.

Thereafter, the sealing material 11. For example, the joint between the inner circumferential surface 2 of the opening of the case 1 and the circumferential surface 4 of the base 3 is sealed by filling with adhesive synthetic resin such as epoxy resin, synthetic rubber, etc. 1
0 is molded.

Note that the electronic component 10 is soldered to a predetermined terminal 6 on the outer side (recess 5) of the base 4 so as to be electrically connected to the relay main body 7 as desired, and then the aforementioned The printed wiring board 8 may be omitted by filling the sealing material 11.

In the sealed relay configured as described above, the electronic components additionally connected to the relay body are molded with a sealant that seals the joint between the case and the base, and are isolated from the inside of the case by the base. Even if it is used in harsh environments such as high temperatures, the effects, especially the adverse effects of heat, are alleviated by the sealing material and base, so deterioration is extremely small and reliability is achieved. is in good condition.

In addition, since the electronic components are securely fixed with a sealing material, even if they are subjected to vibrations due to the operation of relays, etc., or other external vibrations, short circuit accidents, poor connections, etc. will be prevented. This can also be prevented, and the reliability of the sealed relay can be further improved.

Note that if the electronic component is printed and wired on a printed wiring board, electrical connection to the main body of the relay can be easily performed, and the manufacturing effort can be greatly reduced.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the sealed relay of the present invention, and FIG. 2 is an explanatory diagram of the assembled state. 1...Case, 2...Inner peripheral surface of side wall of case, 3...Base, 3a...Base outer surface, 5...Concave Location, 6...Terminal, 7.
... Relay body, 8 ... Printed wiring board, 10 ... Electronic components, 11 ... Sealing material.

Claims (1)

[Scope of utility model registration request] (1) In a sealed relay in which a desired electronic component is electrically connected to a relay body mounted on a base, and a sealing material is filled in the joint between the case and the base, the outer surface of the base and the vicinity of the opening of the case A recess is formed by the inner peripheral surface,
A sealed relay characterized in that the electronic component is housed in the recess and the electronic component is molded by filling the sealing material (2) The electronic component is a printed wiring board that can be stored in the recess. The sealed relay according to claim 1 of the utility model registration claim, characterized in that the relay is attached to a