Contact structure and circuit breaker

Abstract

The utility model discloses a contact structure and a circuit breaker, the contact structure comprises a contact body, and a run-on plate and a contact which are arranged on the contact body, an arc-striking part is formed at one end of the run-on plate, and the arc-striking part is provided with a protruding part which is used for being close to an arc extinguishing grid sheet of the circuit breaker so as to transfer an arc. According to the utility model, the lug boss close to the arc extinguishing grid sheet of the circuit breaker is arranged on the arc striking part of the arc striking plate, so that the arc can be conveniently transferred, and the arc extinguishing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a contact structure and a circuit breaker. Background Art

[0002] Refer to the attached Figure 3 A conventional circuit breaker contact structure includes a static contact body 1', a static contact 2', and an arc-striking plate 3'. When the circuit breaker is disconnected, the static and moving contacts separate rapidly, generating an arc. To protect the static contact 2' from arc erosion and quickly extinguish the arc, the arc is transferred from the static contact 2' to the static arc-striking plate 3'. The arc-striking plate 3' primarily guides the arc, reducing erosion of the static contact and further lengthening the arc. During use, the arc-striking plate 3' is roughly parallel to the bottom of the circuit breaker's arc-extinguishing grid. To facilitate arc movement, a certain gap is reserved between the two. However, the planar structure of the arc-striking plate is not conducive to the arc being transferred from the rear end position of the arc-striking plate 3' corresponding to the arc-extinguishing grid to the arc-extinguishing grid, thereby affecting the arc-extinguishing effect to a certain extent. Utility Model Content

[0003] In view of the deficiencies of the prior art, the present invention provides a contact structure, in which a raised portion for approaching the arc extinguishing grid of the circuit breaker is provided on the arc striking portion of the arc striking plate so as to transfer the arc and improve the arc extinguishing effect.

[0004] To achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0005] A contact structure includes a contact body, an arc-starting plate and a contact point arranged on the contact body. An arc-starting portion is formed at one end of the arc-starting plate. The arc-starting portion is provided with a protrusion for approaching an arc-extinguishing grid of a circuit breaker to transfer the arc.

[0006] Furthermore, the raised portion is a convex bud structure.

[0007] Furthermore, a guide groove is provided on the arc striking plate for guiding the arc to move toward the arc extinguishing chamber.

[0008] Furthermore, the contact structure is a static contact structure.

[0009] Furthermore, the contact body includes a first body portion, a second body portion, and a third body portion. The first body portion and the third body portion are staggered connected through the second body portion. The contact is arranged above the third body portion, and the other end of the arc-starting plate away from the raised portion is connected to the bottom of the third body portion.

[0010] Furthermore, a positioning column is provided on the other end of the arc-striking plate, and a positioning through hole corresponding to the positioning column is provided on the third main body. The mutual cooperation between the positioning column and the positioning through hole forms a positioning effect on the connection between the arc-striking plate and the third main body.

[0011] Furthermore, the positioning post and the positioning through hole are a clearance fit structure.

[0012] Furthermore, corresponding through holes are provided on the arc striking plate and the third main body portion for connecting the arc striking plate and the third main body portion with rivets.

[0013] Based on the same inventive concept, the present invention also provides a circuit breaker including the above-mentioned contact structure.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the contact structure and circuit breaker described in the present invention, a protrusion is provided on the arc striking portion of the arc striking plate, and the protrusion is provided close to the arc extinguishing grid of the circuit breaker, so that the arc can be better transferred from the position of the protrusion to the arc extinguishing grid without staying in the middle position, which is conducive to improving the arc extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the contact structure of an embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the arc striking plate in the contact structure of an embodiment of the utility model.

[0018] Figure 3 It is a three-dimensional structural diagram of the contact structure in the prior art.

[0019] Description of labels:

[0020] 1. Contact body, 2. Arc striking plate, 3. Contact, 4. Rivet, 11. First body portion, 12. Second body portion, 13. Third body portion, 21. Protrusion, 22. Guide groove, 23. Positioning column, 131. Positioning through hole. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] Please refer to the attached Figure 1 , Attachment Figure 2One embodiment of the present invention provides a contact structure, comprising a contact body 1, an arc-striking plate 2 disposed on the contact body 1, and a contact 3. An arc-striking portion is formed at one end of the arc-striking plate 2, and a protrusion 21 is provided on the arc-striking portion for approaching the arc-extinguishing grid of the circuit breaker to transfer the arc. It will be appreciated that in this embodiment, by providing the protrusion 21 on the arc-striking portion of the arc-striking plate 2, and by arranging the protrusion 21 close to the arc-extinguishing grid of the circuit breaker, the arc can be better transferred from the position of the protrusion to the arc-extinguishing grid without lingering in an intermediate position, thereby improving the arc extinguishing effect.

[0024] Please refer to the attached Figure 1 , Attachment Figure 2 In one preferred embodiment, the protrusion 21 is a bud structure. Furthermore, in some embodiments, the top of the bud structure may have a tip, so as to transfer the arc to the arc extinguishing grid more quickly.

[0025] Please refer to the attached Figure 1 , Attachment Figure 2 In one of the preferred embodiments, the arc striking plate 2 is provided with a guide groove 22 for guiding the arc to move toward the arc extinguishing chamber. The guide groove 22 can increase the moving speed of the arc on the arc striking plate 2, so that the arc stays in the middle position of the arc striking plate 2 for a shorter time, the arc is elongated faster, the arc voltage is increased, and the arc burning time is shortened, thereby solving the problems of slow arc moving speed on the existing arc striking plate, long arc stagnation time in the middle position of the arc striking plate, severe ablation in the middle position of the arc striking plate, inability to guide the arc to the rear end position, inability to further extend the arc voltage, and the arc continuous burning time being too long, resulting in severe ablation of the product.

[0026] Please refer to the attached Figure 1 , Attachment Figure 2 In one preferred embodiment, the contact structure is a static contact structure.

[0027] Please refer to the attached Figure 1 , Attachment Figure 2 In one preferred embodiment, the contact body 1 includes a first body portion 11, a second body portion 12, and a third body portion 13. The first body portion 11 and the third body portion 13 are staggeredly connected via the second body portion 12. The contact 3 is disposed above the third body portion 13, and the other end of the arc striking plate 2, away from the protrusion 21, is connected below the third body portion 13. A positioning post 23 is provided on the other end of the arc striking plate 2, and a positioning through-hole 131 is provided on the third body portion 13 corresponding to the positioning post 23. The mutual cooperation between the positioning post 23 and the positioning through-hole 131 forms a positioning function for the connection between the arc striking plate 2 and the third body portion 13.

[0028] Please refer to the attached Figure 1 , Attachment Figure 2In one preferred embodiment, the positioning column 23 and the positioning through hole 131 are a clearance fit structure.

[0029] Please refer to the attached Figure 1 , Attachment Figure 2 In one preferred embodiment, the arc-striking plate 2 and the third body portion 13 are provided with corresponding through holes for rivets 4 to securely connect the arc-striking plate 2 and the third body portion 13. The rivets 4 provide a more secure connection between the arc-striking plate 2 and the third body portion 13. The arc-striking plate 2 and the third body portion 13 may also be connected in other ways and are not limited to the specific embodiments disclosed in this embodiment.

[0030] An embodiment of the present invention further provides a circuit breaker, comprising the above-mentioned contact structure.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present invention.

Claims

1. A contact structure, characterized in that: The invention comprises a contact body (1), an arc striking plate (2) and a contact point (3) arranged on the contact body (1); an arc striking portion is formed at one end of the arc striking plate (2); and a protrusion (21) is provided on the arc striking portion for approaching an arc extinguishing grid of a circuit breaker to transfer an arc.

2. The contact structure according to claim 1, wherein: The raised portion (21) is a convex bud structure.

3. The contact structure according to claim 1, wherein: The arc striking plate (2) is provided with a guide groove (22) for guiding the movement of the arc.

4. The contact structure according to claim 1, wherein: The contact structure is a static contact structure.

5. The contact structure according to any one of claims 1 to 4, characterized in that: The contact body (1) comprises a first body portion (11), a second body portion (12), and a third body portion (13); the first body portion (11) and the third body portion (13) are staggeredly connected via the second body portion (12); the contact point (3) is arranged above the third body portion (13); and the other end of the arc-starting plate (2) away from the protrusion (21) is connected below the third body portion (13).

6. The contact structure according to claim 5, characterized in that: A positioning column (23) is provided on the other end of the arc striking plate (2), and a positioning through hole (131) corresponding to the positioning column (23) is provided on the third body part (13). The positioning column (23) and the positioning through hole (131) cooperate with each other to form a positioning effect on the connection between the arc striking plate (2) and the third body part (13).

7. The contact structure according to claim 6, characterized in that: The positioning column (23) and the positioning through hole (131) are in a clearance fit structure.

8. The contact structure according to claim 5, characterized in that: The arc striking plate (2) and the third main body (13) are provided with corresponding through holes for connecting the arc striking plate (2) and the third main body (13) with rivets (4).

9. A circuit breaker, characterized in that: The contact structure comprises the contact structure according to any one of claims 1 to 8.

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