Static contact structure and molded case circuit breaker thereof

Abstract

The utility model relates to a static contact structure and a molded case circuit breaker thereof, the static contact structure comprises a contact body, one end of the contact body is provided with a connecting end, the other end of the contact body is provided with a current carrying plate, the current carrying plate is provided with a static contact, and two sides of the contact body are provided with shielding plates. According to the utility model, the two sides of the static contact are provided with the corresponding shielding plates, thereby preventing a small part of electric arc from impacting the plastic housing, protecting the plastic housing, and improving the safety and stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a static contact structure and a molded case circuit breaker thereof. Background Art

[0002] Molded case circuit breakers typically house the contacts, arc extinguishing chamber, trip unit, and operating mechanism within a single plastic casing. Existing molded case circuit breakers lack any shielding between the stationary contacts and the circuit breaker casing. When the stationary and moving contacts separate, an arc is generated. While most of the arc flows into the arc extinguishing chamber, a small amount can impact the plastic casing, damaging it. Summary of the Invention

[0003] The purpose of the utility model is to provide a static contact structure and a molded case circuit breaker thereof to solve the above problems.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A static contact structure is characterized in that it includes a contact body, one end of the contact body is formed with a connection end, the other end is formed with a current-carrying plate, the current-carrying plate is provided with a static contact point, and shielding plates are provided on both sides of the contact body.

[0006] The utility model further provides that a magnetic conductive groove is formed on the shielding plate, a permanent magnet is arranged in the magnetic conductive groove, the shielding plates are arranged relatively, and the setting direction of the magnetic conductive groove extends from the static contact side to the connection end side.

[0007] The present invention is further provided with an arc-striking plate provided between the connecting end and the shielding plate, wherein the arc-striking plate has a mounting portion and an inclined portion, and the inclined portion is provided toward the arc-extinguishing chamber.

[0008] The present invention is further provided with that the upper end portion of the shielding plate is an inclined structure, and its inclination angle is consistent with the inclination angle of the inclined portion of the arc-starting plate.

[0009] The present invention is further provided that the magnetic conductive groove has a starting end and an ending end, the starting end is close to the static contact, and the ending end is close to the arc starting plate.

[0010] The present invention is further provided with that the inclination direction of the magnetic conductive groove is consistent with the inclination direction of the upper end portion of the shielding plate.

[0011] The utility model is further provided that the shielding plate is made of insulating material.

[0012] The utility model also provides a molded case circuit breaker having the static contact structure.

[0013] Beneficial effects of the present invention: In the present invention, corresponding shielding plates are provided on both sides of the static contact to prevent a small portion of the arc from impacting the plastic housing, thereby protecting the plastic housing and improving safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of Example 1 of the present utility model.

[0015] Figure 2 This is a three-dimensional diagram of embodiment 2 of the present utility model.

[0016] Reference numerals: 10, contact body; 20, connection end; 30, current-carrying plate; 40, static contact; 50, shielding plate; 60, magnetic guide groove; 70, permanent magnet; 80, arc-starting plate; DETAILED DESCRIPTION

[0017] The following will explain the implementation methods of the present application in detail with reference to examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] Example 1:

[0019] like Figure 1 As shown, this embodiment is a static contact structure, including a contact body 10, wherein a connection end 20 is formed at one end of the contact body 10, and a current-carrying plate 30 is formed at the other end. A static contact 40 is provided on the current-carrying plate 30, and shielding plates 50 are provided on both sides of the contact body 10.

[0020] The shielding plate 50 is formed with a magnetic groove 60, within which a permanent magnet 70 is disposed. The shielding plates 50 are disposed relative to each other, and the magnetic groove 60 extends from the static contact 40 toward the connection end 20. In this embodiment, the magnetic groove 60 has an arc-shaped waist structure. The magnetic groove 60 has a starting end and a terminal end. The starting end is adjacent to the static contact 40, and the terminal end is adjacent to the arc-starting plate 80.

[0021] An arc striking plate 80 is disposed between the connecting end 20 and the shielding plate 50 . The arc striking plate 80 has a mounting portion and an inclined portion. The inclined portion is disposed toward the arc extinguishing chamber.

[0022] The upper end portion of the shielding plate 50 is an inclined structure, and its inclination angle is consistent with the inclination angle of the inclined portion of the arc-starting plate 80. The shielding plate 50 is made of insulating material.

[0023] Example 2:

[0024] In this embodiment, the structure of the magnetic conductive groove 60 is a parallelogram structure, wherein the magnetic conductive groove 60 and the upper end portion of the shielding plate 50 are inclined in the same direction.

[0025] Example 3:

[0026] The utility model also provides a molded case circuit breaker having the static contact structure.

[0027] In the present invention, corresponding shielding plates 50 are provided on both sides of the static contact to prevent a small portion of the arc from impacting the plastic housing, thereby protecting the plastic housing and improving safety and stability.

[0028] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0029] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0030] The above description shows and describes several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A static contact structure, characterized in that: The contact body comprises a contact body, one end of which is formed with a connection end, the other end of which is formed with a current-carrying plate, the current-carrying plate is provided with a static contact point, and shielding plates are provided on both sides of the contact body.

2. A static contact structure according to claim 1, characterized in that: A magnetic conductive groove is formed on the shielding plate, and a permanent magnet is arranged in the magnetic conductive groove. The shielding plates are arranged relative to each other, and the arrangement direction of the magnetic conductive groove is extended from the static contact side to the connection end side.

3. A static contact structure according to claim 2, characterized in that: An arc striking plate is provided between the connecting end and the shielding plate. The arc striking plate has a mounting portion and an inclined portion. The inclined portion is provided toward the arc extinguishing chamber.

4. A static contact structure according to claim 3, characterized in that: The upper end portion of the shielding plate is an inclined structure, and its inclination angle is consistent with the inclination angle of the inclined portion of the arc-starting plate.

5. A static contact structure according to claim 4, characterized in that: The magnetic conductive groove has a starting end and an ending end, the starting end is close to the static contact, and the ending end is close to the arc-starting plate.

6. A static contact structure according to claim 2, characterized in that: The magnetic conductive groove and the upper end portion of the shielding plate have the same inclination direction.

7. A static contact structure according to claim 1, characterized in that: The shielding plate is made of insulating material.

8. A molded case circuit breaker, characterized in that: A static contact structure having any one of claims 1 to 7.

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