JPH08138827A - Surge absorber - Google Patents

Abstract

PURPOSE: To provide an inexpensive surge absorber easy to assemble with less assembling manhours by simply assembling insulating cases except for soldering part of electric parts to form the surge absorber. CONSTITUTION: The horizontal portions 16, 21 of two approximately L-shaped terminal 15, 20 are guided to right and left opposite sides across a box B which is assembled by jointing two insulating cases 1, and the horizontal portions of the terminal guided out of the box are vertically arranged at different levels. In addition, electric parts 13, 23 including surge absorbing elements are mounted with guide strips 4, 5, 6 and guide grooves 7, 8, 9 formed in the insulating cases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surge absorber that absorbs surges such as lightning that enter a line.

[0002]

2. Description of the Related Art Conventionally, as a surge absorber using a combination of a gas arrester and a varistor, one electrode of the gas arrester and one electrode of the varistor are electrically and firmly attached with solder or the like. There is known a surge absorber in which a lead wire such as an electric wire is led out from the other electrode and the other electrode of the varistor to form a terminal, and the gas arrester and the varistor are led out and the entire terminal is insulation-coated.

[0003]

In the conventional surge absorber described above, since the gas arrester and the varistor are connected by soldering, in particular, since the soldering surface of the electrode of the gas arrester is a concave portion, When mounting a gas arrester electrode on a varistor with a flat soldering surface, the heat generated during soldering remains in the recess, and this heat is then released from the recess, creating pinholes in the soldered part There is a problem of getting worse.

Such pinholes cause pinholes even in the subsequent insulating coating, and there is a problem that corrosion is caused by the poor appearance of the finished product and moisture entering through the pinholes. Also, the lead wires that connect to the outside have a small diameter, and due to the weight of electric parts such as gas arresters and varistors, and especially when used in a vibrating place, disconnection or peeling of connection parts, etc. It is also possible that there is a risk of.

An object of the present invention is to solve the above-described problems of the conventional surge absorber, and to provide a surge absorber having a simple assembly process, high reliability and improved productivity. Especially.

[0006]

In order to achieve the above-mentioned object, the present invention provides a horizontal portion of two substantially L-shaped terminals,
Each of the terminals is led out to the left and right opposite sides of the box body assembled by joining two insulating cases, and the horizontal portions of the terminals led out of the box body are arranged so as to have a step in the vertical direction. In addition, an electric component including a surge absorbing element is attached by a guide piece and a guide groove formed in the insulating case,
Further, the gas arrester, which is the surge absorbing element, is held by a short rod and a long rod standing upright from the bottom of the insulating case.

[0007]

1 is a perspective view of an embodiment of a surge absorber of the present invention, showing the internal structure of the surge absorber, the front view of the surge absorber of the present invention with one insulating case removed. FIG. 2 is a diagram, FIG. 3 is a cross-sectional view taken along the line I-I in FIG. 2, FIG. 4 is a cross-sectional view taken along the line II-II in FIG. 2, and a connection diagram of the surge absorber of the present invention. The surge absorber of the present invention will be described with reference to FIG.
The present invention is not limited to this example as long as the gist of the present invention is not exceeded.

The basic configuration of the surge absorber of the present invention is
As will be described later, the insulating case is divided into two parts, and a varistor, a gas arrester as an electric component, a terminal, a connecting plate and the like which are mounted on the insulating case.

Reference numeral 1 denotes an insulating case of substantially the same shape in which the inside made of an insulating material is formed in a concave shape. Two insulating cases 1 are set as a set and the opening surfaces of the two insulating cases 1 are formed. Box body B in which two parts are joined, and the joined portion is adhered by an appropriate adhesive means such as an adhesive or ultrasonic welding, and electric parts such as a varistor, a gas arrester, a terminal and a connecting plate are mounted.
Is formed.

In the vicinity of the corner of one inner wall 3a of the opposing inner walls 3a, 3b of the insulating case 1, a guide piece 4 is provided.
A guide piece 5 and a guide piece 6 are provided in the vicinity of both corners of the other inner wall 3b so as to project. Further, a predetermined central portion of each of the inner walls 3a, 3b of the insulating case 1 facing each other has a predetermined shape. Two sets of protruding pieces 7a, 7b, 8 arranged at intervals
Two guide grooves 7 and 8 formed between a and 8b are provided, and further, the inner wall 3 of the insulating case 1 is provided.
In a, facing the guide piece 6 arranged on the inner wall 3b,
Two projecting pieces 9a, 9b arranged at a predetermined interval
A guide groove 9 formed between the two is provided. The guide piece 4 and the guide piece 5, the guide groove 9 and the guide piece 6, and the guide groove 7 and the guide groove 8 are configured so that the electrical components described later can be mounted substantially vertically.

From the bottom portion 10 of the insulating case 1, two long rods 11 and one short rod 12 placed between the long rods 11 and 11 are erected. Two long rods 1
When the two insulating cases 1 are joined at the opening surface 2, the lengths of the long rods 11 and 11 are such that the tips of the long rods 11 and 11 come into contact with each other. Is a surge absorber, the tip of the cylindrical gas arrester 13 is in contact with the outer peripheral surface 14 of the gas arrester 13, and the gas arrester 13 is attached to the long rod 11.
And the short rod 12 is positioned and held. As shown in FIG. 3, the tips of the two opposing short rods 12 abut the outer peripheral surface 14 of the gas arrester 13, and the four long rods 11 move toward the gas arrester 1.
3 is sandwiched by the short rod body 12 and the long rod body 11,
It is configured to hold the gas arrester 13.

Reference numeral 15 denotes a terminal used as a line terminal, which is formed by bending a single plate into a substantially L shape, and the horizontal portion 16 of the terminal 15 has a bottom portion 10 of the insulating case 1.
The insulating case 1 is inserted into the slit 10a formed in the
Further, the ascending piece 17 that is led out to the outside and is bent at a substantially right angle to the horizontal portion 16 of the terminal 15 is
It is arranged along the bottom 10 in the insulating case 1, and is attached to the insulating case 1 by being sandwiched between the bottom 10 of the insulating case 1 and the guide piece 4 and between the bottom 10 of the insulating case 1 and the guide piece 5. The rising piece 17 is connected to one electrode of the gas arrester 13.

Reference numeral 18 denotes a connecting plate formed of a single plate. The connecting plate 18 is integrally provided with a tongue piece 19 having elasticity by press working or the like. The connecting plate 18 is an insulating case. The tongue piece 19 is connected to the other electrode of the gas arrester 13 while being attached to the insulating case 1 by inserting the tip edge portion of the connecting plate 18 into the guide groove 7 and the guide groove 8 of 1.

Reference numeral 20 denotes a terminal used as a ground terminal, which has a horizontal portion 21 and a descending piece 22 formed by bending one plate into a substantially L shape, and the horizontal portion 21 is
The downward piece 22 is inserted into the slit 10a formed in the bottom portion 10 of the insulating case 1 and led out of the insulating case 1.
The insulating case 1 is arranged along the bottom portion 10 and attached to the insulating case 1 by the guide groove 9 and the guide piece 6 of the insulating case 1. And terminal 2
The tip of the down piece 22 of 0 is connected to one of the lead terminals of the varistor 23 by soldering. The other lead terminal of the varistor 23 is connected to the connection plate 18,
It is configured as in the circuit diagram shown in FIG.

As shown in FIG. 2, the terminal 15 used as a line terminal and the terminal 20 used as a ground terminal are assembled by joining the two insulating cases 1 by the respective horizontal portions 16 and 21. The box B is sandwiched between the horizontal portions 16 of the terminal 15 and the horizontal portion 21 of the terminal 20 which are horizontally led out to the left and right opposite sides of the box B. Therefore, since the surge absorber is attached to the device by inserting a screw or a bolt into the screw holes 16a and 21a formed in the terminals 15 and 20, the surge absorber is less likely to vibrate. It is possible to prevent a failure of the surge absorber caused by. Further, since the terminal 15 as a line terminal and the terminal 20 as a ground terminal are plate-shaped terminals, respectively, they have good attachment stability with respect to an attachment surface and excellent vibration resistance.

Reference numeral 24 denotes a widening portion formed by bulging a part of the bottom portion 10 of the insulating case 1 to the outside.
Of the insulating case 1 in order to dispose an electrical component larger than the width between the bottoms 10 of the two insulating cases 1 joined together in the box B assembled by joining the two insulating cases 1. In the present invention, the varistor 23 is arranged in the widened portion 24.

As described above, in the surge absorber of the present invention, one electrode of the gas arrester 13 is brought into contact with the ascending piece 17 of the terminal 15 having a substantially L-shape, and the other electrode of the gas arrester 13 is connected. Since the tongue piece 19 of the connection plate 18 is brought into contact with the tongue piece 19 to form the connection of the gas arrester 13, there is no pinhole which occurs in the conventional soldering, and the finish is good.

Further, the guide pieces 4, 5, 6 are attached to the insulating case 1.
And the guide grooves 7, 8 and 9 are provided, the guide piece 4 and the guide piece 5 form the terminal 15, and the guide groove 7 and the guide groove 8
The connection plate 18 is further fixed by the guide piece 6 and the guide groove 9 to fix the terminal 20 to the insulating case 1, and the tubular gas arrester 13 is attached to the long rod 11 and the short rod 12.
The electric components such as the gas arrester 13, the varistor 23, the terminals 15 and 20, and the connection plate 18 can be mounted in the box B formed by joining the two insulating cases 1 simply by positioning and holding them with. Therefore, the surge absorber can be configured by simply assembling the insulating case 1 except for a part of the connection by soldering. Therefore, the surge absorber is easy to assemble and has a small number of assembling steps. I have a vessel.

Further, since the gas arrester 13 is held so as to be surrounded by the two short rod bodies 12 and the four long rod bodies 11 which are opposed to each other, compared with the conventional pressing by only the tongue of the connecting plate, The gas arrester 13 can be reliably held, and therefore, the reliability of contact with the terminal is improved and the shock resistance against dropping or the like is excellent.

Furthermore, the terminals 15 and 20 are formed in a substantially L shape, and the ascending piece 17 of the terminal 15 and the descending piece 22 of the terminal 20 introduced into the box B are respectively provided on the bottom portion 10 of the insulating case 1. Since they are arranged close to each other and attached by the guide pieces 4, 5, 6 and the guide groove 9, the terminal 1
The vibration absorbers 5 and 20 do not move, and the vibration resistance of the surge absorber is improved.

Since the tips of the two short rods 12 facing each other are brought into contact with the outer peripheral surface 14 of the cylindrical gas arrester 13, the four long rods 11 are arranged so as to sandwich the gas arrester 13. The gas arrester 13 can be easily and surely mounted in the box B formed by joining the two insulating cases 1 without using a special fastener or the like.

[0022]

Since the present invention is configured as described above, it has the following effects.

Since the surge absorber can be formed only by assembling the insulating case except for the connection by soldering a part of the electric parts, the assembling is easy and the surge absorber is inexpensive and has a small number of assembling steps. Can be provided.

Since the terminals introduced into the box body are formed in a substantially L shape and the parts introduced into the box body are arranged close to each other along the bottom of the insulating case, the terminals may move due to vibration. Without increasing the vibration resistance of the surge absorber.

Since the horizontal portions of the two terminals are respectively led out to the left and right sides with the box body sandwiched therebetween, the horizontal portions of the terminals led out of the box body are arranged so as to have a step in the vertical direction. The surge absorber attached to the device via the terminal has good vibration resistance, and therefore, it is possible to prevent the failure of the surge absorber caused by vibration.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a surge absorber according to the present invention.

FIG. 2 is a front view of the inside of the surge absorber of the present invention with one insulating case removed.

FIG. 3 is a sectional view of the surge absorber of the present invention taken along the line I-I of FIG.

4 is a sectional view of the surge absorber of the present invention taken along the line II-II of FIG.

FIG. 5 is a wiring diagram of the surge absorber of the present invention.

[Explanation of symbols]

 B: Box body: Insulation case 4, 5, 6 ... Guide pieces: 7, 8, 9 ... Guide groove 11 ・ ・ ・ ・ ・ ・ Long rod 12 ・ ・ ・ ・ ・ ・ ・ ・ Short rod 13 ・ ・ ・ ・ ・ ・ Gas arrester 15, 20 ・ ・ ・ ・ ・ ・ Terminal 18: Connection plate 23: Varistor

Claims (2)

[Claims] 1. A horizontal portion of two substantially L-shaped terminals is led out to the left and right opposite sides of a box body assembled by joining two insulating cases, respectively.
The horizontal portion of the terminal led out from the box body is arranged so as to have a step in the vertical direction, and furthermore, the electric component including the surge absorbing element is attached by the guide piece and the guide groove formed in the insulating case. Surge absorber characterized by doing so. 2. The surge absorber according to claim 1, wherein the gas arrester, which is the surge absorbing element, is held by a short rod and a long rod standing from the bottom of the insulating case. .