JPS61109239A - Contact switch gear - 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 opening/closing device used in relays, contactors, switches, etc., and particularly requiring a wiping operation between contacts.

[Background Art] This type of contact switching device, especially one with a rated current of about IA to 30A, can cause contacts to weld due to inrush current when the contacts are turned on, or wear out of the contacts as the number of times they are opened and closed increases, resulting in contact failures and In order to prevent temperature rise and other malfunctions, a wiping operation is performed between the contacts. To obtain this wiping action, as seen in hinged relays,
A leaf spring movable contact having a movable contact is attached to a movable iron piece of an excitation electromagnet device, and the movable contact is deflected by the amount of movement of the movable iron piece from the time when both contacts touch, that is, overtravel, and this deflection causes the movable contact to move. Generally, the contact is fixed or slides on a fixed contact. However, with a method that relies only on the deflection of the movable contact, there is a limit to the amount of sliding between the contacts, that is, the amount of wiping, the wiping force, and the ability to ensure sufficient wiping speed. Alternatively, it is desired to improve wear resistance.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to improve the wiping operation between contacts, thereby improving the welding resistance or wear resistance of the contacts. To provide a contact switchgear that can be obtained.

[Disclosure of the Invention] A contact opening/closing device according to the present invention has a first contact made of a rigid conductive material that is driven to a contact/detach position by a driving means, and a contact that makes contact with and decomposes the contact. a second contact made of a rigid conductive material that causes the contact to operate on a trajectory different from that of the contact; and a second contact pivotably supporting one end of the second contact and engaging the other end of the second contact. The device comprises support means for the second contact that determines the normal position, and urging means that urges the second contact toward the normal position, and when the two contacts make contact, the two contacts operate in different trajectories from each other. This feature is characterized in that it makes sliding contact.

(Example) An embodiment of the present invention will be described below with reference to FIG.

The contact switching device 1 includes a first contact 2, a second contact 4, and a second contact
The basic components are a contact supporting means 6 and a second contact urging means 7.

The first contactor 2 is formed of a conductive material into a long plate shape with sufficient rigidity, has a contact 3 fixed to one end 2a, and has a rotatable pivot at the other end 2b. The first contactor 2 is rotatably driven to the contact/separation position by a known driving means (not shown) such as an electromagnetic device.

The second contact 4 is formed of a conductive material into a stepped plate shape with sufficient rigidity, consisting of a flat surface portion 4a on one end side and a flat surface portion 4b on the other end side, and is brought into contact with and separated from the contact point 3 at the flat surface portion 4a on the one end side. Contact 5 is stuck.

The support means 6 of the second contactor 4 has a cross-sectional shape and has a flange 6c at the tip of one facing piece 6a toward the other facing piece 6b.
are set up in succession. Further, one end 4c of the second contact 4 is pivotally supported at the tip of the other opposing piece 6b, and the inner surface of the collar 6C is the second contact 4.
The other end abuts and engages with the outer surface of the flat portion 4b. The support means 6 thus define the normal position of the second contact 4, which can be pivoted about one end 4c, with its contact 5 being different from the contact 3 of the first contact 2. Activate the trajectory.

The biasing means 7 of the second contact 4 is made of a spring material formed into a coil shape and is compressively loaded between the connecting piece 6d of the second contact 4 and the support means 6, and the biasing means 7 of the second contact 4 has a spring material formed in a coil shape and is compressively loaded between the connecting piece 6d of the second contact 4 and the support means 6. It is biased towards the position.

The operation of such a contact switching device 1 will be explained as shown in FIG.
) is in an open state. From this state, when the first contactor 2 is rotated counterclockwise by a driving means such as an electromagnetic device, both contacts 3.5 come into contact as shown in (b). When the first contact 2 further overcomes the spring force of the biasing means 7 and continues to rotate, the second contact 4 rotates clockwise while compressing the biasing means 7, reaching state C). During the states (b) to (C), that is, while both contacts 3, 5 are in contact, both contacts 3.5 operate on different trajectories and perform sliding contact (wiping operation).

In this embodiment, the center of rotation of both contacts 2 and 4 is at both contacts 3.
．． Since the contact points 3 and 5 are located on both sides of the contact point 5, the contact position of both contacts 3 and 5 changes sufficiently to the right in (b) and to the left in (c). The change in the contact position of both contacts 3 and 5, that is, the amount of wiping, is ensured by the fact that both contacts 2 and 4 are rigid bodies, and the wiping speed is increased because both contacts 2 and 4 do not bend. The speed is increased and the wiping force is strengthened.

Note that the first contactor 2 is not limited to one that rotates;
The shape and arrangement of other members can also be changed arbitrarily.

FIGS. 2 and 3 show an example in which the contact opening/closing device of the present invention is applied to a hinge type relay. A fixed iron core 12 is attached to the stand 11 of the relay 10. Coil 13. An electromagnetic device composed of a yoke 14 and an amatia 15 and a support means 6 for the anchor point opening/closing device 1
are mounted in close proximity. First contactor 2 of contact switching device 1
is attached to the amatia 15 at its base end 2b. The tip of the other opposing piece 6b of the support means 6 and the one end 4 of the second contactor 4
Curling-processed pivot parts 6e and 4d are formed on C, and are coaxially supported by a pivot shaft 16. Reference numeral 17 denotes a return spring that is tensioned between the yoke 14 and the amatia 15. The other members of the contact switching device 1 are the same as those shown in FIG. 1, and the same members are given the same reference numerals. Further, members not directly related to the disclosure of the present invention, such as the terminals, lead wires, and covers of the relay 10, are omitted.

Even with such a relay 10, the contact opening/closing device 1 exhibits the same effect as described based on FIG. 1, and a good wiping operation is performed.

[Effects of the Invention] The contact opening/closing device according to the present invention has a contact as described above, and a first contact made of a rigid conductive material that is driven to a contact/detach position by a driving means, and a first contact that makes contact/detachment with the contact. a second contact made of a rigid electrically conductive material having a contact and operating the contact in a trajectory different from that of the contact; a second contact pivotally supporting one end of the second contact and engaging with the other end; A support means for a second contact that determines the normal position of the contact, and an urging means that urges the second contact toward the normal position, and when the two contacts make contact, the two contacts have different trajectories from each other. Since the wiping operation is made to operate and make sliding contact, the wiping operation such as the amount of wiping between the contacts, the wiping force, and the wiping speed are improved, and the molten bridge that occurs between the contacts when the contacts are closed is reliably removed before it solidifies. It is possible to improve the welding resistance or abrasion resistance of the contacts.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically representing an embodiment of the present invention (a
) is the contact open state, and (b) is the state immediately after contact 1. (C
) shows the wiping operation state, Fig. 2 is a side view of main parts showing an example in which one embodiment of the present invention is applied to a relay, and Fig. 3 is an exploded perspective view thereof. 1 contact, 3--first contact contact, 4-second contact, 5
- contact of second contact, 6- support means of second contact, 7-
Biasing means for the second contact, 10-U Ray. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshikuro Takemitsu (two idiots) Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A first contact made of a rigid conductive material that has a contact and is driven to a contact/detach position by a driving means, and a contact that makes contact with and separates from the contact, and moves the contact on a trajectory different from that of the contact. a second contact made of a rigid conductive material actuated by a second contact; and second contact support means for pivotally supporting one end of said second contact and engaging the other end to define a normal position of said second contact. and a biasing means for biasing the second contact toward the normal position, and the contact opening/closing device operates in different trajectories and slides into contact when the two contacts contact each other.