Single-beat type double-breakpoint auxiliary group

Abstract

The utility model relates to a single-beat type double-breakpoint auxiliary group, which comprises a shell, a connecting rod and a combined normally-closed contact. Two groups of static contacts corresponding up and down are arranged in the shell, a contact support is slidably mounted between the static contacts, and a clamping groove is formed in the top of the contact support. And a spherical head at one end of the connecting rod is movably arranged in the clamping groove and can move at multiple angles to ensure that the contact system acts accurately and reliably, and a cylindrical head at the other end penetrates through the side wall of the shell to be matched with the contactor body. A bridge-shaped contact is arranged in a first rectangular window of the contact support, and contact points at four corners of the bridge-shaped contact are provided with silver wires which are in line-surface contact with a static contact, so that weak signal conduction performance is improved. The combined normally-closed contact is composed of a fixed plate and a reed type movable plate, and a silver contact is installed at one end of the movable plate and penetrates through the second rectangular window to correspond to the lower static contact. When the contactor is powered on and off, the connecting rod drives the contact support to act to realize opening and closing of the contact. In addition, the convex hulls on the reed type movable plate increase the opening distance of the normally-closed contact, thereby preventing the generation and spreading of electric arc, and improving the breaking capacity and the insulating property.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a single-step double-break auxiliary group. Background Technology

[0002] Currently, most of the traditional auxiliary contact systems produced in the domestic low-voltage electrical appliance industry are direct-acting double-break structures, with spherical and planar point contacts, resulting in poor conductivity for weak signals. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a single-shot double-break auxiliary group to solve the problem of poor weak signal conductivity in existing auxiliary group contact systems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A single-step double-break auxiliary assembly includes a housing, a connecting rod, and a combination of normally closed contacts. The housing contains two sets of stationary contacts, which are distributed vertically and vertically. A contact bracket is slidably installed between the stationary contacts, and a slot is provided on the top of the contact bracket.

[0006] One end of the connecting rod is a spherical head, and the other end is a cylindrical head. The end of the connecting rod with the spherical head is movably installed in the slot at the top of the contact bracket. The end of the connecting rod with the cylindrical head passes through the side wall of the housing and is fitted onto the contactor body. A bridge-shaped contact is installed in the first rectangular window of the contact bracket. An elastic element is installed between the bottom of the bridge-shaped contact and the first rectangular window. The contact points at the four corners of the top of the bridge-shaped contact correspond to the stationary contact in the upper part of the housing. Silver wires are provided on the contact points at the four corners of the top of the bridge-shaped contact.

[0007] The combined normally closed contact consists of a fixed plate and a spring-type movable plate. One end of the fixed plate is fixedly installed inside the housing, and the other end of the fixed plate is riveted to one end of the spring-type movable plate and then fixedly installed inside the housing. A silver contact is installed on the other end of the spring-type movable plate.

[0008] One end of the reed-type movable plate that mounts the silver contact passes through the second rectangular window of the contact bracket and corresponds to the stationary contact in the lower part of the housing.

[0009] Furthermore, the internal shape of the slot matches the external shape of the connecting rod ball head.

[0010] Furthermore, the reed-type movable plate is also equipped with a protrusion.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The fit between the connecting rod ball head and the contact bracket slot makes the transmission between the connecting rod and the contact bracket flexible and stable, and can adapt to forces of different directions and angles when the contactor body moves, ensuring that the contact bracket accurately and smoothly follows the movement of the connecting rod.

[0013] The silver wire of the bridge-shaped contact contacts the surface of the stationary contact line. When transmitting weak signals, the smaller resistance can reduce signal loss during transmission, making the signal pass through the contact system more stably and efficiently, thereby significantly improving the weak signal conduction performance.

[0014] The structure of the reed-type movable plate gives the combined normally closed contact good elasticity and mobility, enabling it to move flexibly under relatively small external forces;

[0015] Silver contacts further improve the conductivity of the contact area, enhancing the ability to conduct weak signals. The raised bulge increases the opening distance of the normally closed contacts, effectively preventing the generation and spread of electric arcs, improving the breaking capacity and insulation performance of the contacts, ensuring the safety and stability of the circuit, while also reducing contact wear and extending the service life of the combined normally closed contacts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model in its non-working state;

[0017] Figure 2 This is a schematic diagram of the working structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the combined normally closed contact structure of this utility model;

[0019] Figure 4 This is a schematic diagram of a bridge-shaped contact structure;

[0020] Figure 5 This is a schematic diagram of the contact support structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the connecting rod structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the assembly structure of this utility model.

[0023] In the diagram: 1. Housing; 2. Connecting rod; 3. Combined normally closed contact; 4. Contact support; 5. Bridge-shaped contact; 6. Stationary contact; 7. Slot; 8. First rectangular window; 9. Second rectangular window; 201. Spherical head; 202. Cylindrical head; 301. Fixed plate; 302. Spring-type movable plate; 303. Silver contact; 304. Protrusion. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0025] A single-shot double-break auxiliary assembly includes a housing 1, a connecting rod 2, and a combination normally closed contact 3. The housing 1 is provided with two sets of stationary contacts 6, which are distributed vertically and vertically. A contact bracket 4 is slidably installed between the stationary contacts 6, and a slot 7 is provided on the top of the contact bracket 4.

[0026] One end of the connecting rod 2 is a spherical head 201, and the other end is a cylindrical head 202. The end of the connecting rod 2 with the spherical head 201 is movably installed in the slot 7 on the top of the contact bracket 4. The engagement between the spherical head 201 and the slot 7 allows the connecting rod 2 to move at multiple angles within a certain range, which can better adapt to the forces of different directions and angles generated when the contactor body moves. This allows the contact bracket 4 to accurately and smoothly follow the movement of the connecting rod 2, ensuring the accuracy and reliability of the contact system's movement. The cylindrical head 202 of the connecting rod 2 passes through the side wall of the housing 1 and then engages with... Installed on the contactor body, a bridge-shaped contact 5 is installed in the first rectangular window 8 of the contact bracket 4. An elastic element is installed between the bottom of the bridge-shaped contact 5 and the first rectangular window 8. The contacts at the four corners of the top of the bridge-shaped contact 5 correspond to the stationary contacts 6 in the upper part of the housing 1. Silver wires are provided on the contacts at the four corners of the top of the bridge-shaped contact 5. The silver wires of the bridge-shaped contact 5 are in line-to-line contact with the stationary contacts 6. When transmitting weak signals, the smaller resistance can reduce the signal loss during transmission, making the signal pass through the contact system more stably and efficiently, thereby significantly improving the weak signal conduction performance.

[0027] The combined normally closed contact 3 is composed of a fixed plate 301 and a spring-type movable plate 302. One end of the fixed plate 301 is fixedly installed inside the housing 1, and the other end of the fixed plate 301 is riveted to one end of the spring-type movable plate 302 and fixedly installed inside the housing 1. When the contactor body is energized and moves downward, the connecting rod 2 drives the contact bracket 4 to move upward, so that the silver contact 303 is disconnected from its corresponding stationary contact 6, and at the same time the bridge-shaped contact 5 is closed with the upper stationary contact 6.

[0028] One end of the reed-type movable plate 302, which mounts the silver contact 303, passes through the second rectangular window 9 of the contact bracket 4 and corresponds to the stationary contact 6 in the lower part of the housing 1. The structural design of the reed-type movable plate 302 gives the combined normally closed contact 3 good elasticity and mobility, enabling flexible movement under relatively small external forces. At the same time, the reasonable opening distance also helps to reduce wear on the contact during frequent opening and closing, extending the service life of the combined normally closed contact 3, thereby improving the reliability and durability of the entire auxiliary assembly.

[0029] The internal shape of the slot 7 matches the external shape of the ball head 201 of the connecting rod 2.

[0030] The reed-type movable plate 302 is also equipped with a protrusion 304, which increases the opening distance of the normally closed contact. When the contact is broken, the larger opening distance can effectively prevent the generation and spread of electric arc, improve the breaking capacity and insulation performance of the contact, and ensure the safety and stability of the circuit.

[0031] When the contactor body is energized and attracted, it moves downward. Utilizing the lever principle, the connecting rod 2 drives the contact support 4 to slide upward, causing the silver contact 303 to disconnect from its corresponding stationary contact 6, and the contact on the bridge-shaped contact 5 to close with its corresponding stationary contact 6.

[0032] When the contactor body is de-energized and released, the contact support 4 slides downward through the connecting rod 2 under the action of the reaction force, so that the silver contact 303 and its corresponding stationary contact 6 are closed, and the contact on the bridge-shaped contact 5 is disconnected from its corresponding stationary contact 6.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-shot dual-breakpoint auxiliary group, characterized in that: Includes housing (1), connecting rod (2) and combined normally closed contact (3). The housing (1) is provided with two sets of stationary contacts (6), which are distributed vertically and vertically. A contact bracket (4) is slidably installed between the stationary contacts (6), and a slot (7) is provided on the top of the contact bracket (4). One end of the connecting rod (2) is a spherical head (201) and the other end is a cylindrical head (202). The end of the connecting rod (2) with the spherical head (201) is movably installed in the slot (7) at the top of the contact bracket (4). The end of the connecting rod (2) with the cylindrical head (202) passes through the side wall of the housing (1) and is fitted onto the contactor body. A bridge-shaped contact (5) is installed in the first rectangular window (8) of the contact bracket (4). An elastic element is installed between the bottom of the bridge-shaped contact (5) and the first rectangular window (8). The contact points at the four corners of the top of the bridge-shaped contact (5) correspond to the stationary contact (6) at the top of the housing (1). Silver wires are provided on the contact points at the four corners of the top of the bridge-shaped contact (5). The combined normally closed contact (3) consists of a fixed plate (301) and a spring-type movable plate (302). One end of the fixed plate (301) is fixedly installed inside the housing (1), and the other end of the fixed plate (301) is riveted to one end of the spring-type movable plate (302) and fixedly installed inside the housing (1). A silver contact (303) is installed on the other end of the spring-type movable plate (302). One end of the reed-type movable plate (302) that mounts the silver contact (303) passes through the second rectangular window (9) of the contact bracket (4) and corresponds to the stationary contact (6) in the lower part of the housing (1).

2. The single-shot double-breakpoint auxiliary group according to claim 1, characterized in that: The internal shape of the slot (7) matches the external shape of the ball head (201) of the connecting rod (2).

3. The single-shot double-breakpoint auxiliary group according to claim 1, characterized in that: The reed-type movable plate (302) is also equipped with a protrusion (304).

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