Contact structure of control and protection switch

Abstract

The utility model discloses a contact structure of a control and protection switch, the contact structure of the control and protection switch comprises a contact supporting piece and contact bridge groups, the contact supporting piece is provided with a plurality of through holes from top to bottom for accommodating the contact bridge groups to move up and down, and the contact structure of the control and protection switch is characterized in that two sides of one end of each through hole are provided with inclined planes; the contact bridge group comprises a plurality of stacked contact bridge sheets, each contact bridge sheet comprises a supporting part, the plurality of stacked supporting parts are connected and fixed through a spot welding process, two ends of each supporting part are provided with first bending parts, and the first bending parts are provided with first extending parts in an extending manner. When the movable contact is in contact with the static contact, the first bending parts and the second bending parts absorb counter-acting force and release elasticity, so that the movable contact is quickly pressed on the static contact, and repeated springback is avoided; and vibration energy generated by the first extension part and the second extension part is absorbed through the spring, so that springback is further reduced, and the product has the advantage that the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a contact structure of control and protection switch. BACKGROUND

[0002] The control and protection switch product adopts the single product structure type of modularization, integrates the main functions of traditional circuit breaker (fuse), contactor, overload (or overcurrent, open-phase) protection relay, starter, isolator and the like, is mainly used in the power system under the normal condition (including the prescribed overload condition) under the circuit of the rated voltage to 690V, the rated current from 0.8A to 630A, the adjustable working current from 0.8A to 630A, and can be connected, carried and broken down the circuit under the prescribed abnormal condition (such as short circuit).

[0003] The contact structure of the control and protection switch electrical apparatus provided in the market generally includes a contact support, a contact bridge is arranged on the contact support, and movable contacts are arranged on the two sides of the contact bridge. When the contact support moves, the movable contacts are closed with static contacts. The movable contacts will generate a reaction force due to the impact with the static contacts. After the contact moment, there will be multiple rebounds, and vibration or jumping will be generated. The silver layer of the movable contacts and the static contacts is easy to be ablated, and the service life of the movable and static contacts is accelerated. Therefore, the applicant has made beneficial design, found a method to solve the above problems, and the technical scheme to be introduced below is generated in this background. SUMMARY

[0004] The utility model discloses a product that improves the service life to overcome the insufficient of the contact structure design of the traditional protection switch electrical apparatus.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A contact structure of control and protection switch, including contact support, contact bridge group, the contact support is equipped with a plurality of upper and lower movable through -hole of contact bridge group from top to bottom, the both sides of one end of the through -hole are equipped with inclined plane, the contact bridge group includes a plurality of the contact bridge piece of stacking, the contact bridge piece includes support part, a plurality of the support part of stacking is connected fixed through spot welding process, the both ends of support part are equipped with first curved part, first extension is equipped with the first curved part extension, second curved part is equipped with the first extension, second extension is equipped with the second curved part extension, second extension is equipped with movable contact, support part is equipped with the pressure plate corresponding to the inclined plane, and is close to first curved part, and the spring is arranged between pressure plate and inclined plane.

[0007] Preferably, the inclined plane is provided with a first cylinder, and the inner wall of the through hole is provided with a guide block on both sides.

[0008] Preferably, the pressure bearing plate comprises a mounting portion, the bottom of the mounting portion is provided with at least two convex columns, the mounting portion is connected and fixed with the supporting portion through a spot welding process, one end of the mounting portion is provided with an inclined pressure bearing portion, and the pressure bearing portion is provided with a second cylinder, and a reinforcing portion is arranged between the mounting portion and the pressure bearing portion.

[0009] Preferably, the supporting portion is provided with a counterbore for accommodating the convex column, and both sides of the supporting portion are provided with sliding grooves for the guide blocks to pass through.

[0010] Preferably, the opposite surface of the moving contact is provided with a stationary contact, and the stationary contact is provided with a stationary spring piece.

[0011] Preferably, the spring is arranged in the first cylinder and the second cylinder.

[0012] Beneficial effects:

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] When the moving contact and the stationary contact are in contact, the multiple first bending portions and the second bending portions release elasticity after absorbing the reaction force, so that the moving contact is quickly pressed on the stationary contact, and multiple rebounds are avoided; the spring absorbs the vibration energy generated by the first extension portion and the second extension portion after the moving contact and the stationary contact are in contact, further reduces the rebound after the moving contact and the stationary contact are in contact, overcomes the problems in the background art, and makes the product have the advantage of improving the service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the contact structure of the control and protection switch of the utility model;

[0016] Figure 2 It is a control and protection switch of the utility model Figure 1 A partial enlarged view B of the contact structure of the control and protection switch of the utility model;

[0017] Figure 3 It is a side sectional structural schematic view of the contact structure of the control and protection switch of the utility model;

[0018] Figure 4 It is a control and protection switch of the utility model Figure 3 A partial enlarged view B of the contact structure of the control and protection switch of the utility model;

[0019] Figure 5 It is an exploded structural schematic view of the contact structure of the control and protection switch of the utility model;

[0020] The correspondence between the annotations of the figures in the drawings and the component names is as follows:

[0021] 1, contact support; 2, contact bridge group; 3, pressure bearing plate; 4, spring; 5, movable contact; 6, fixed contact; 7, fixed spring piece; 11, through hole; 12, inclined surface; 13, first cylinder; 14, guide block; 21, contact bridge piece; 22, support part; 23, first bending part; 24, first extension part; 25, second bending part; 26, second extension part; 221, counterbore; 222, sliding groove; 31, mounting part; 32, protruding column; 33, pressure bearing part; 34, second cylinder; 35, reinforcing part. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0024] In the embodiments of the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0025] Reference Example Figures 1 to 5A kind of contact structure of control and protection switch, including contact support 1, contact bridge group 2, contact support 1 is equipped with several upper and lower movable through hole 11 of containing contact bridge group 2 from top to bottom, the both sides of one end of through hole 11 are equipped with inclined surface 12, contact bridge group 2 includes several stacked contact bridge pieces 21, contact bridge piece 21 includes support part 22, and the support part 22 of multiple stacked is connected and fixed by spot welding process, the both ends of support part 22 are equipped with first curved part 23, first curved part 23 is extended and is equipped with first extension 24, first extension 24 is extended and is equipped with second curved part 25, second curved part 25 is extended and is equipped with second extension 26, second extension 26 is equipped with moving contact 5, support part 22 is equipped with pressure plate 3 corresponding to inclined surface 12, and is close to first curved part 23, pressure plate 3 is equipped with spring 4 between inclined surface 12, when moving contact 5 and static contact 6 contact the instant, through the first curved part 23 of multiple contact bridge pieces 21, second curved part 25 is released after absorbing reaction force, so that the moving contact 5 of second extension 26 is quickly pressed on static contact 6, avoid producing multiple rebound;

[0026] Worth mentioning is that the inclined surface 12 is equipped with the first cylinder 13, the both sides of the inner wall of the through hole 11 are equipped with guide block 14, the first cylinder 13 prevents spring 4 from being separated, and the guide block 14 prevents the support part 22 from moving left and right, so that it makes the ascending or descending action along the guide block 14;

[0027] Worth mentioning is that the pressure plate 3 includes mounting part 31, the bottom of the mounting part 31 is equipped with at least two convex columns 32, the mounting part 31 is connected and fixed with the support part 22 by spot welding process, one end of the mounting part 31 is extended and is equipped with inclined pressure part 33, and is directed to the inclined surface 12, the pressure part 33 is equipped with the second cylinder 34, the mounting part 31 and the pressure part 33 are equipped with the reinforcing part 35, the pressure part 33 changes the force direction of spring 4, the second cylinder 34 prevents spring 4 from being separated, and the reinforcing part 35 increases the structural strength of the pressure plate 3;

[0028] Worth mentioning is that the support part 22 is equipped with the counterbore 221 containing the convex column 32, the both sides of the support part 22 are equipped with the sliding groove 222 for the guide block 14 to pass through, the counterbore 221 facilitates the accurate positioning of the position of the support part 22 for the mounting part 31, the mounting part 31 is close to the first curved part 23, which is convenient for spring 4 to provide powerful support for the second extension 26, and spring 4 also makes the moving contact 5 and the static contact 6 in close contact;

[0029] Worth mentioning is that the opposite surface of the moving contact 5 is equipped with the static contact 6, and the static contact 6 is equipped with the static spring piece 7;

[0030] It is worth mentioning that the spring 4 is arranged in the first cylinder 13 and the second cylinder 34, and the vibration energy generated by the first extension 24 and the second extension 26 after the movable contact 6 is contacted is absorbed by the spring 4, so that the rebound after the movable contact 6 is contacted is further reduced.

[0031] The product can realize the advantage of prolonging the service life through the above design scheme.

[0032] The above is further detailed description of the utility model in combination with specific embodiments, and the utility model specific implementation cannot be limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A contact structure for controlling and protecting a switch, comprising a contact support (1) and a contact bridge group (2), the contact support (1) being provided with a plurality of through holes (11) from top to bottom for accommodating the contact bridge group (2) to move up and down, characterized in that: One end of the through hole (11) is provided with an inclined surface (12), the contact bridge group (2) comprises a plurality of stacked contact bridge pieces (21), the contact bridge piece (21) comprises a supporting part (22), a plurality of stacked supporting parts (22) are connected and fixed by spot welding process, both ends of the supporting part (22) are provided with a first bending part (23), the first bending part (23) is provided with a first extension (24), the first extension (24) is provided with a second bending part (25), the second bending part (25) is provided with a second extension (26), the second extension (26) is provided with a moving contact (5), the supporting part (22) is provided with a pressure plate (3) corresponding to the inclined surface (12) and close to the first bending part (23), a spring (4) is arranged between the pressure plate (3) and the inclined surface (12).

2. A contact structure of a control and protection switch according to claim 1, characterized in that: The inclined surface (12) is provided with a first cylinder (13), and both sides of the inner wall of the through hole (11) are provided with a guide block (14).

3. A contact structure of a control and protective switch according to claim 2, characterized in that: The pressure plate (3) comprises a mounting part (31), the bottom of the mounting part (31) is provided with at least two convex columns (32), the mounting part (31) is connected and fixed with the supporting part (22) by spot welding process, one end of the mounting part (31) is provided with an inclined pressure part (33) and faces the inclined surface (12), the pressure part (33) is provided with a second cylinder (34), and a reinforcing part (35) is arranged between the mounting part (31) and the pressure part (33).

4. A contact structure of a control and protective switch according to claim 3, characterized in that: The supporting part (22) is provided with a counterbore (221) for accommodating the convex column (32), and both sides of the supporting part (22) are provided with a sliding groove (222) for the guide block (14) to pass through.

5. A contact structure of a control and protective switch according to any of claims 2 to 4, characterized in that: Opposite surfaces of the moving contact (5) are provided with stationary contacts (6), and the stationary contacts (6) are provided with stationary spring pieces (7).

6. A contact structure of a control and protection switch according to claim 5, characterized in that: The spring (4) is arranged in the first cylinder (13) and the second cylinder (34).

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