JPS63108634A - Contactor - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] Technical Field The present invention relates to electromagnetic! The present invention relates to a contact device suitable for use in 174 devices and the like.

Prior Art FIG. 4 is a perspective view of a conventional contact device 1. The structure of the contact device 1 will be explained with reference to FIG. It should be noted that the first unit shown in FIG. At the contact, I'y, 72 position 1'c', the coil 3 is placed on the base 2, and the coil 3-\ is moved in the arrow A1 direction or the arrow A2 direction by force energization/deenergization. An amatia 4 is provided which is reciprocated and a card 5 is provided which responds to the amacia 4. This card 5 has a movable contact plate 6
A movable contact (not shown) is provided in the free end portion 32 of the movable contact plate 6. Contact plates 7 and 3 each having seven fixed contacts are provided at a position n opposite to this movable contact in the direction of the arrow A1 or the direction of the arrow A2. Further, a yoke 9 is provided to form a magnetic path for causing the reciprocating displacement of the amatia 4.

Hereinafter, with reference to FIG. 4, the operation of the contact device 1 of the heather technique will be explained. Fill 3 is energized when energized
ia, and move Ama 74 and card 5 to arrow A, for example.
Displaced in one direction, this card 5 presses the movable contact plate 6 in the direction of arrow A1, and the movable rear tip provided on the movable contact plate 6 comes into contact with the fixed contacts of the contact plate 7. Also Phil 3
When the power is turned off, the amachia 4 and the card 5 return in the direction of the arrow A2 due to the elasticity of the movable contact plate 6, and the movable contact of the α plate 6 comes into contact with the fixed contact of the contact plate 8. . After moving the movable contact plate 6 in this way, α becomes
By selectively contacting the fixed contacts of the contact plates 7 and 8, switching between the fixed contacts of the contact plates 7 and 8 is realized, and power, electrical signals, etc. are transferred to the terminal group 10 provided on the base 2. selectively taken out.

In the sealed type contact device 1 having such a configuration, as the temperature rises due to long-term use, the f, such as paraffin, applied to the coil winding of the coil 3 evaporates, causing the paraffin to evaporate. In addition, organic gases such as polymethyl phosphoric acid contained in the PBT resin used in the contact device 1 are also generated. Such a presence W1 is carbonized by the energy of the arc generated when the contacts are closed,
This carbide adheres to the contacts formed on the movable contact plate 6 and the contact plate 7.8, and the adhered carbide further adsorbs the organic gas and becomes carbonized, condensing and growing.

The presence of such carbides between the contacts increases the contact resistance between the contacts, and the gap between such contacts is set to, for example, less than 1 m+s, so that the carbides are excessively present. As it grows, it bridges the separated movable contact and fixed contact, forming a contact assembly (i!
This will impair the opening/closing operation of No. 1.

Furthermore, if such a contact device is a so-called open type that does not have the above-mentioned airtight housing, during soldering work etc., particles such as 7 lux may enter between the contacts and cause a bridging phenomenon. Put it away.

Purpose An object of the present invention is to provide a contact device that solves the above-mentioned problems, suppresses contact resistance between contacts, and improves reliability and extends life.

Embodiment FIG. 2 is a perspective view showing the structure of a contact device Wllll according to an embodiment of the present invention. The configuration of this embodiment will be explained with reference to FIG. The contact device W111 has a base 12 made of an electrically insulating material, and one side of the base 12 is provided with a plurality of terminal groups 13, and the opposite surface of the base 12 is provided with terminals 13, which will be described later. An electromagnetic device having such a configuration is provided, which is hermetically sealed by a housing 14.

A fill 15 is placed in the housing 14, and a 77-chip 716 is provided that is reciprocated in the direction of arrow B1 or B2 by energizing/deenergizing the coil 15. A card 17 made of electrically insulating material is connected to this amatia 16, and this card 17 allows the arrow B1 to be
The movable contact plate 18 is pressed in the direction shown in FIG.
is provided.

The road end g side of the movable contact plate 18 is divided in the width direction (in the vertical direction in FIG. 2) by a q notch W419 formed along its longitudinal direction, and a pair of leg portions 20° and 21 are formed. A movable contact, which will be described later, is provided near the roadside of this leg 20.21, and a fixed contact plate having fixed contacts, which will be described later, at positions facing the movable contact in the direction of arrow B1 or the direction of arrow B2, respectively. 22 and 23 are provided respectively. Also, the arrow B1 direction of the Amatia 16 or the arrow B
A yoke 34 is provided to configure a magnetic path that realizes reciprocating displacement in two directions.

Figure 1 shows the fixed contact plate 23 and the movable contact plate 1 shown in Figure 2.
8 is an enlarged perspective view of the vicinity of the leg portion 20.21 of FIG. The configuration of the contact device 11 will be described in detail with reference to FIG. As mentioned above, movable contacts 24a and 24 are provided on both surfaces of the plate-shaped leg portions 20.21 on the roadside side of the leg portions 20.21.
b; 25a, 25b (reference mark 24.' when used collectively)
251:') are respectively fixed by, for example, welding. The two movable contacts 24.25 have a so-called semicylindrical shape, and the movable contacts 24.2
Bent portions 26 and 27 are provided further toward the roadside than 5, which are curved in a convex manner toward the fixed contact plate 23.

On the other hand, the fixed contact 2 with which the movable contacts 24 and 25 come into contact/separate
8 is provided on the movable contact plate 18 side of the fixed contact plate 23. The shape of this fixed contact 28 is also so-called semicylindrical. This fixed contact 28 faces the movable contacts 25a and 25b, and the movable contact plate 18@ A convexly curved curve g toward
29 is provided.

At least one of the curved portions 26, 27; 29 is provided with an impurity gas on the side facing each other (in this embodiment, on the curved portion 29 side), as shown with double hatching in FIG. Phosphate ester P O (OH20R), which is a substance that adsorbs
An organic coating layer 30 is formed by coating POOH(OR)2, PO(OR)3, (R; alkyl group), and the like. The phosphoric acid ester may be, for example, phosphoric acid trimethyl ester PO (OCHsL't).Also, instead of forming this organic coating film 130, movable contact, α24
A contact lubricant or the like may be applied to one of the movable contacts a and 24b (in this embodiment, the movable contact 24b is shown with double hatching in FIG. 1).

In the contact device 11 having such a configuration, the arc generated when the contacts are opened and closed extends between the contacts toward the bent portions 26, 27; 29, so the bent portions 26, 27; Material coating layer 301.1 carbonizes easily. This porous material after carbonization adsorbs the above-mentioned retained gas in the housing 14, thereby preventing the problems pointed out in the prior art from occurring. Moreover, the movable contact 24a is caused by the arc.

At least any of 24b is applied to one side.jl, piq
Similar effects can be obtained even when the contact lubricant is heated.

FIG. 3 is an enlarged perspective view of a portion of a contact device according to another embodiment of the present invention. This embodiment is similar to the previous embodiment, and corresponding parts are given the same reference numerals.

The noteworthy point of this embodiment is that the bell 711 of the movable contact plate 18
The road end portion of 20.21 is bent to the fixed contact plate 23gA to form a bent portion 31.32, and the surface of the bent portion 31. A semiconductor laser element 33 is provided at a position facing the organic coating layer 30 of eight octopuses forming the organic coating layer 30 made of Ebophosphoric acid ester, etc., and the laser beam from the semiconductor laser element 33 is directed to the bent portion. 31. The organic coating layer 30 of 32 is irradiated and heated to advance the carbonization process. 6 Generation of laser light from the semiconductor laser element 33 is achieved by, for example, energizing/deenergizing the power supplied to the coil 15. The organic coating layer 30 may be carbonized in advance by the laser beam from the laser element 33, which is similar to the above. Effects similar to those described in the embodiment can be obtained.

According to the present invention as described in "Effects" 2, in a contact device in which a fixed contact and a movable contact are neatly housed in a housing,
A substance that adsorbs impurities in the housing due to the temperature increase is applied to a temperature increase region near at least one of the fixed contact and the movable contact. Therefore, even if impurities are generated in the housing due to the contact opening/closing operations of the contact device, the impurities are adsorbed by the coating material. Therefore, such impurity gas adheres to the fixed contacts and movable contacts, and is carbonized due to the temperature rise caused by the arc, and the carbonized substance is further carbonized as impurities adhere to it. It is possible to prevent the situation from repeatedly growing and deteriorating the performance of the contact device.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of the vicinity of a movable contact plate 18 and a fixed contact plate 23 according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of a contact device 11 according to an embodiment of the present invention, and FIG. The figure is an enlarged perspective view of the vicinity of the movable contact plate 18 and the fixed contact plate 23 according to another embodiment of the present invention, and FIG.
2) is a perspective view of a1. 11... Contact device, 14... Bar 7 zone, 18...
...Movable contact plate, 22.23...Fixed contact plate, 24.
25... Movable contact, 28... Fixed contact, 30...
Organic coating layer, 33... semiconductor laser element

Claims (3)

[Claims] (1) A contact device in which a fixed contact and a movable contact are hermetically housed in a housing, in which impurities in the housing are deposited in a temperature raised area near at least one of the fixed contact or the movable contact due to the temperature rise. A contact device characterized by being coated with a substance that adsorbs gas. (2) The contact device according to claim 1, wherein the substance that adsorbs the impurity gas is a phosphoric acid ester compound. (3) The contact device according to claim 1, wherein the phosphoric acid ester compound is phosphoric acid trimethyl ester PO(OCH_3)_3.