JPH0129692Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switch used as an auxiliary switch of a high-voltage electromagnetic contactor.

As shown in conventional FIGS. 1 and 2, a pair of fixed contacts 1 are arranged, and a window hole 3 is formed in a sliding insulating support 2 that slides perpendicularly between the pair of fixed contacts 1. A movable contact 4 bridging the fixed contact 1 is inserted into the window hole 3, and a contact spring 5 is inserted into the window hole 3 to bias the movable contact 4. In the fitted switch, the support protrusion 6 of the contact spring 5 is provided protruding from the inner wall of the window hole 3 of the sliding insulating support 2, one end of the contact spring 5 is externally fitted, and the other end of the contact spring 5 is fitted. is formed into a U-shaped cross section, and is received on both sides by a spring receiver 7 guided to the side wall of the sliding insulating support 2. This spring receiver 7 is located at the center of the movable contact 4, and the movable contact 4 is biased by a contact spring 5.

This switch requires a spring receiver 7 for receiving the contact spring 5, and requires a large number of parts and is complicated to assemble. Furthermore, the center of the movable contact 4 is bent obliquely in order to position the spring receiver 7, and the gap with the fixed contact is small, making further miniaturization difficult in order to maintain current-carrying current interrupting capacity. be.
Furthermore, even if it is attempted to provide the movable contact 4 in the window hole 3 of the sliding insulating support 2 on the opposing inner wall side, the positioning of the movable contact 4 in the width direction with respect to the sliding insulating support 2 and the contact spring 5 are difficult. Since it cannot be mounted, a special sliding insulating support 2 must be manufactured separately, which is expensive. In addition, in the conventional switch, the contact 8 of the fixed contact 1, the movable contact 4
If dust or oxide film is formed on the contact surface of the contact 9, contact failure is likely to occur.

Furthermore, there is no single insulating support in which normally closed contacts and normally open contacts can be freely rearranged, and sliding insulating supports have been manufactured separately.

Therefore, in view of the above circumstances, the present invention has been devised so that the contact automatically slides on the contact surface during contact to perform self-cleaning, and is also movable to either the left or right side of the inner wall of the window hole of the sliding insulating support. In order to accommodate the contact, a support protrusion of the contact spring having a sloped tip is provided to protrude opposite the inner wall of the window hole, and the center portion of the movable contact is formed into a bent recess for receiving the contact spring. Guide pieces that slide on the side walls of the sliding insulating support are provided at both ends of the bent recess.

Hereinafter, the present invention will be explained in detail based on the drawings of FIGS. 3 to 7.

A pair of fixed contacts 11 having contacts 10 are arranged.

A sliding insulating support 12 is provided perpendicularly between the pair of fixed contacts 11 to be slidable manually or electromagnetically. A rectangular window hole 13 is bored in the sliding insulating support 12, and the inner wall of the window hole 13, on which the contact spring and movable contact come into contact, is inclined when viewed from the direction of the window hole 13, which has an open end. Support protrusions 15 formed on the slope 14 are provided to protrude in opposition to each other. A generally rectangular movable contact 16 made of sheet metal that bridges the fixed contact 11 is inserted into the window hole 13 so as to contact the slope 14 of the support protrusion 15 with both ends protruding. One end is fitted onto the support protrusion 15, and the other end is brought into contact with the center of the movable contact 16 to bias it. A contact 18 is provided at both ends of the movable contact 16 at a position opposite to the contact 10 of the fixed contact 11, and a bent recess 19 having a width approximately the same as the thickness of the sliding insulating support 12 is formed in the center thereof. Guide pieces 20 that slide on the side ends of the sliding insulating support 12 are provided in a folded manner at the upper and lower ends of both sides of the U-shaped cross section of the bent recess 19. The maximum height of the movable contactor 16 (the height of the upper and lower guide pieces 20) is higher than the height of the window hole 13, and the bent recess 19 is formed slightly lower than the height of the window hole 13. When inserting the movable contact 16 into the window hole 13, insert the movable contact 16 at an angle from vertical to nearly horizontal, and insert the movable contact 16 at an angle from the center to the sliding insulating support 1.
The guide piece 20 is placed on the thick wall portion of the sliding insulating support 12 and raised to abut against the side wall of the sliding insulating support 12. The movable contactor 16 is provided in an inclined state as shown in FIG.

Further, as shown in FIG. 7, the movable contact 16 can be easily rearranged so as to come into contact with the slope 14 of the support protrusion 15 opposite to the mounting position shown in FIG. Normally closed contact (b contact) and normally open contact (a
The recombination of the contacts is carried out using one sliding insulating support 12, with one sliding insulating support 12 being normally closed as shown in FIG. 4 and normally open as shown in FIG. This can be illustrated for ease of understanding as shown in FIGS. 8 and 9. 8 corresponds to FIG. 4, and FIG. 9 corresponds to FIG. 7.

In the switch constructed in this manner, the sliding insulating support 12 slides to connect the movable contact 16 to the fixed contact 16.
When contacting and bridging, the inclined contact 18 of the movable contact 16 contacts the contact 10 of the fixed contact 11 and slides on the contact surface.

In the present invention, as described above, a pair of fixed contacts are arranged, and a window hole is bored in a sliding insulating support that slides perpendicularly between the pair of fixed contacts,
A movable contact bridging the fixed contact is inserted into the window hole, and a contact spring is fitted into the window hole so as to bias the movable contact, the switch comprising: On the inner wall of the window hole of the sliding insulating support body where the contact spring/movable contact comes into contact, supporting protrusions of the contact spring whose tips are formed with slopes are protruded from opposite to each other to support the movable contact in an inclined state. , forming a central part of the movable contact into a bent recess for receiving a contact spring;
This switch is equipped with guide pieces that slide on the side walls of the sliding insulating support at both ends of the bent recess, and the inclined fixed contact slides on the contact surface of the contact of the fixed contact. Performs self-cleaning by removing dust and oxide film on the contact surface.

The movable contact of the present invention has a bent recess at the center to receive the end of the contact spring, and guide pieces that slide on the side walls of the sliding insulating support are provided at both ends of the bent recess. This reduces the number of parts, simplifies assembly, and reduces the cost of the switch. In addition, conventional movable contacts are formed in a diagonal manner in order to locate the spring receiver in the center, and the gap with the fixed contact is small, making it difficult to downsize in order to maintain current-carrying current interrupting capacity. In the present invention, since the central part of the movable contact is formed into a bent recess, the gap between the movable contact and the fixed contact can be increased, and the switch can be made smaller. Furthermore, since supporting protrusions are provided on the inner wall of the window hole of the sliding insulating support body to allow the contact spring to be fitted externally, movable contacts are provided on both sides of the inner wall and can be used in common. Since the opening contacts can be freely rearranged, there is no need to manufacture a separate sliding insulating support.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional switches; Figure 1 is a partially sectional plan view, Figure 2 is a perspective view, and Figures 3 to 7.
The drawings show a specific embodiment of the present invention, in which Fig. 3 is a partially sectional plan view, Fig. 4 is a side view, Fig. 5 is a perspective view of the movable contact, and Fig. 6 is a movable contact. 7 is a side view of the movable contact mounted on the other support protrusion side, FIG. 8 is a plan view of the normally closed contact (b contact) switch corresponding to FIG. 4, and FIG. 9 is a front view of the child. This figure is a plan view of a normally open contact (A contact) switch corresponding to FIG. 7. 11... Fixed contact, 12... Sliding insulating support, 13... Window hole, 17... Contact spring, 16...
Movable contact, 14... slope, 15... support protrusion,
19...Bending recess, 20...Guiding piece.

Claims (1)

[Scope of utility model registration request] A pair of fixed contacts are arranged, a window hole is bored in a sliding insulating support that slides perpendicularly between the pair of fixed contacts, and the fixed contact is bridged through the window hole. A switch is provided in which a movable contact is inserted into the window hole, and a contact spring is fitted into the window hole so as to bias the movable contact, the contact spring of the window hole of the sliding insulating support body - On the inner wall that the movable contact comes into contact with, support protrusions of the contact spring formed on slopes that are inclined when viewed from the direction of the window hole whose tip is opened are provided to protrude and support the movable contact in an inclined state. ,
The central part of the movable contact is formed into a bent recess that receives the contact spring, and folded guide pieces that slide on the side walls of the sliding insulating support are provided at both ends of the bent recess, and one sliding insulating support is used to constantly operate the movable contact. A switch characterized by the freedom to select between closed and normally open contacts.