JPS617526A - Contactor unit of electromagnetic relay or like - 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 [Technical Field] The present invention relates to a contact device such as an electromagnetic relay that requires sliding between contacts, that is, a wiping operation.

This type of contact device uses a wiping operation between the fixed contact provided on the fixed contact and the movable contact provided on the movable contact to prevent them from welding. Specifically, the movable contact is made of an elastic material. However, even after the two contacts come into contact, a pressing force is further applied to the movable contact to cause it to bend, and at this time the movable contact slightly slides, thereby performing a wiping operation.

In this case, l/' depends only on the deflection of the movable contact.
kJ, the wiping amount is extremely small, and therefore not sufficient to prevent contact welding and improve contact reliability.

[Purpose of the invention]

The present invention has been made in view of the above points, and its purpose is to prevent contact welding by ensuring a sufficient amount of wiping between contacts, thereby improving contact reliability of electromagnetic relays, etc. A contact device is provided in the corner.

[Disclosure of the invention]

In the present invention, the fixed contact is made of an elastic material and a material on the tip side, and is supported so as to be able to swing freely, so that when the contacts provided on both contacts come into contact, the movable contact moves into the flexible portion of the fixed contact. It is characterized by bending and sliding both contacts.

(Example) A first example of the present invention will be described below based on FIGS. 1 and 2.

Reference numeral 1 denotes an electromagnetic relay, and a housing is constructed of a device stand 2 and a cover 3.A fixed contact terminal 4, a movable contact terminal 5, and a coil terminal 6 are coated from the device stand 2 on the outside of the housing, while a fixed relay is placed inside the housing. The fixture 2 is equipped with a fixed contact 7 and a movable contact 8 connected to the contact terminal 4, and an electromagnet device 9 which is a driving member thereof.

The fixed contact 7 is made of an elastic material, and has a proximal end 7a fixed to the base 2, and a flexible portion 7d protruding toward the movable contact 8 is formed in an intermediate portion 7C on the distal end 7b side. A fixed contact lO is provided at the center of the portion 7d. Further, the back surface of the fixed contact 7, that is, the surface opposite to the movable contact 8, comes into contact with the side surface of the receiving part 28 of the base 2.

In the electromagnet device 9, the lower leg piece Ua of the U-shaped yoke 11 is fixed to the base 2, and a fixed iron core wrapped with a coil tip is fixed to the connecting piece Llb, and is movable on the end face of the upper leg piece 11c. The iron piece 14 is hinge-supported, that is, swingably supported, and a return spring is suspended to bias the movable iron piece 14 away from the fixed iron core 4.

The movable contact 8 is made of a rigid material and has a fixed contact I at its tip 8a.
A movable contact 16 that approaches and separates from O is provided, and its base end 8b is held by an insulator 17 and fixed to the movable iron piece 14.

Therefore, the movable contact 8 is also swingably supported on the end face of the upper leg piece UC.

Reference numeral 18 denotes an electric wire, which electrically connects the movable contact terminal 5 and the base end 8b of the movable contactor 8. Reference numeral 19 denotes a coil lead wire, which electrically connects the coil terminal 6 and the coil V12.

In such a contactor device consisting of the fixed contactor 7 and the movable contactor 8, when the coil I'L/12 is excited, the movable iron piece 14 resists the spring force of the return spring and presses against the fixed iron core. As a result, the movable contact 8 rotates clockwise, and both contacts 10 and 16 first come into contact as shown in FIG. 2(b). When the movable contact 8 further rotates, the fixed contact 7 receives the pressing force of the movable contact 8 and its back side slides on the side surface of the receiving part 2a, causing the flexible part 7d to bend, and eventually the fixed contact 10 is bent at the tip 7b. The contact points 10.16 slide to perform a wiping operation. When the coil is no longer energized, the movable contact 8 rotates counterclockwise, contrary to the operation described above, as shown in Fig. 2 (
a), that is, the state returns to the state shown in FIG.

In this sliding movement of both contacts to and 16, the movement direction of the constant contact b is approximately perpendicular to the movement direction of the movable contact 16 due to the bending of the fixed contact 7, so the bending is effectively converted into a movement value. It can be converted and the wiping storm can be larger than the conventional one.

3 and 4 show a second embodiment of the invention.

Note that the same members as in the first embodiment are denoted by the same reference numerals.

In this device, the fixed contact 27 extends from the base end 27a to the distal end 27a.
7b is bent into a substantially U-shape, and a flexible portion 27 protrudes toward the movable contact armature at an opposing piece 27° on the tip 27b side.
d is formed, and a fixed contact 10 is provided at the tip 27b. On the other hand, the movable contact 10.16 extends to a position where an insulator 29, which is a part of the movable contact 10.
d so that it can be pressed.

2b has a receiving portion 2a due to the bending space of the bending portion 27d.
It is a recess created by cutting out the end of the Therefore, even in this case, after the coil v12 is excited and the movable contact 28 rotates clockwise, and both contacts to and iet come into contact, the flexible portion 27d receives the pressing force of the insulator 29 and contacts both contacts. to,
16 slides and performs a wiping operation, producing the same effects as in the first embodiment.

Although both the first and second embodiments are shown as being used in electromagnetic relays, this contact device can be applied to circuit breakers and switches in general.

〔Effect of the invention〕

As described above, in the contact device such as an electromagnetic relay of the present invention, the fixed contact is made of an elastic material and has a flexible portion formed on the tip side, and the movable contact is made of a rigid material and supported so as to be swingable. When the respective contacts come into contact, the movable contact flexes the flexible part of the fixed contact so that both contacts slide, ensuring a sufficient amount of wiping between the contacts to prevent contact welding. This has the effect of improving contact reliability.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing the first embodiment of the invention, and Fig. 2 is a diagram explaining its operation, in which (a) shows the open state, (b) shows the contact state, and (c) shows the wiping state. Main part side view shown,
FIG. 3 is a vertical cross-sectional view showing the second embodiment of the invention, and FIG. 4 is a diagram explaining its operation, in which (a) shows the open state, (b) shows the contact state, and (c) shows the wiping state. FIG. 3 is a side view of main parts. DESCRIPTION OF SYMBOLS 1... Electromagnetic relay, 2... Device stand, 7.27... Fixed contact, 8, 28... Movable contact, 9... Electromagnet device, [0... Fixed contact, 14 ...Movable iron piece, 16
...Movable contact, 17.29...Insulator. Figure 1 2 z /

Claims (1)

[Claims] (1) A contact device such as an electromagnetic relay consisting of a fixed contact with a fixed contact and whose base end is fixed to a base, and a movable contact with a movable contact that connects and separates from the fixed contact and is driven by a drive member. In the above, the fixed contact is made of an elastic material and has a flexible portion formed on the tip side, and the movable contact is made of a rigid material and supported so as to be swingable, and when the two contacts come into contact, the movable contact A contact device such as an electromagnetic relay, characterized in that the contact bends a flexible portion of a fixed contact to cause both contacts to slide.