Circuit breaker contact structure
By adopting the ‘U’ type static contact and magnetic permeable plate design in the circuit breaker contact structure, the electric repulsion is enhanced, and the parts are fixed by fixing glue, the problem of insufficient breaking capacity of the circuit breaker is solved, achieving efficient power cut-off and noise-free effect.
Patent Information
- Application Number
- CN202422260567.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The breaking capacity of existing circuit breakers is insufficient, mainly due to the insufficient electric repulsion of dynamic and static contacts, which leads to the short-circuit current being unable to repel quickly, affecting the protection effect of the plastic-shell circuit breaker.
The static contact is designed as a ‘U’-shaped structure, and several side-by-side magnetic permeable sheets are provided in the static contact to enhance the electric repulsion. At the same time, the magnetic permeable sheet is fixed with fixed glue to prevent vibration, forming a contact structure with a compact structure and a large electric repulsion.
The circuit breaker breaking capability is improved, ensuring that the circuit breaker quickly cuts off the power supply in the short circuit situation, and reducing noise generation, achieving a compact and noise-free design.
Smart Images
Figure CN223155958U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliance manufacturing, and particularly relates to a contact structure of a circuit breaker. Background Art
[0002] A circuit breaker is an electrical product that can automatically cut off the power supply to protect in case of overload and short circuit. With the development of the power system, the requirements for the breaking capacity of the circuit breaker are also getting higher and higher. The high breaking capacity of the molded case circuit breaker mainly depends on that when a short-circuit current occurs, the moving and static contacts are quickly repelled under the action of the electro-dynamic repulsive force, so as to limit the continuous increase of the short-circuit current. The current-limiting ability of the contacts directly affects the breaking capacity of the molded case circuit breaker. Summary of the Invention
[0003] The utility model mainly solves the deficiencies existing in the prior art, and provides a contact structure of a circuit breaker, which has the characteristics of compact structure, large electro-dynamic repulsive force and no noise. The problem of poor breaking capacity of the circuit breaker is solved.
[0004] The above technical problems of the utility model are mainly solved by the following technical solutions:
[0005] A contact structure of a circuit breaker includes a base. At least one partition cavity is arranged in the base. A static contact is arranged in the partition cavity. A moving contact rotatably connected with the base is arranged on the static contact. The cross section of the static contact is in a "U" shape. One end of the static contact is in contact with or separated from the moving contact. A wiring row is arranged at the other end of the static contact. A plurality of magnetically conductive sheets arranged side by side are arranged in the static contact. Fixing glue adhered to the magnetically conductive sheets is arranged at the bottom of the partition cavity.
[0006] Preferably, an insulating tape for fixedly covering the magnetically conductive sheet is arranged on the outer ring of the magnetically conductive sheet.
[0007] Preferably, the magnetically conductive sheet is made of iron and has a thickness less than 3 mm.
[0008] Preferably, an arc angle integrally extending with the static contact is arranged at one end of the static contact in contact with the moving contact.
[0009] Preferably, the wiring row and one end of the static contact are in an integral structure and in a "Z" shape.
[0010] The utility model can achieve the following effects:
[0011] The utility model provides a breaker contact structure, which has the characteristics of compact structure, large electro-dynamic repulsion force and no noise compared with the prior art. The problem of poor breaking capacity of the breaker is solved. The static contact is designed in a "U" shape, so that the currents of the moving and static contacts are in opposite directions to form a repulsion force; by adding a magnetic conductive sheet, the electro-dynamic repulsion force is enhanced; through the setting of the fixing glue, the parts are strengthened to prevent the parts from vibrating due to the electromagnetic force. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic structural diagram of the utility model.
[0013] Figure 2 is a cross-sectional view of the side structure of the utility model.
[0014] In the figure: base 1, partition cavity 2, static contact 3, moving contact 4, wiring row 5, magnetic conductive sheet 6, fixing glue 7, insulating tape 8, arc angle 9. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The technical solution of the utility model will be further specifically described below through embodiments and in combination with the drawings.
[0016] Embodiment: As Figure 1 and Figure 2 shown, a breaker contact structure includes a base 1. At least one partition cavity 2 is provided inside the base 1. A static contact 3 is provided inside the partition cavity 2. A rotatable moving contact 4 is provided on the static contact 3. The static contact 3 is in a "U" shape. When the moving contact 4 rotates to contact with the static contact 3, the breaker is turned on; when the moving contact 3 rotates to separate from the static contact, the breaker is turned off. The other end of the static contact 3 extends outwards to form a wiring row 5 that is higher than one end of the static contact 3. The wiring row 5 is used for customers to connect wires. A plurality of magnetic conductive sheets 6 arranged side by side are provided inside the "U" cavity of the static contact 3. The magnetic conductive sheets 6 enhance the magnetic induction intensity between the moving contact 4 and the static contact 3, thereby enhancing the electro-dynamic repulsion force. Fixing glue 7 is provided at the bottom of the partition cavity 2. The fixing glue 7 adheres to the magnetic conductive sheets 6. The fixing glue 7 prevents parts such as the magnetic conductive sheets 6 from vibrating due to the electromagnetic force and generating noise.
[0017] The magnetic conductive sheets 6 are arranged vertically, and the outer circles of the magnetic conductive sheets 6 are fixed with insulating tape 8; the material of the magnetic conductive sheets 6 is iron, and the thickness is less than 3 mm. One end of the static contact 3 in contact with the moving contact 4 extends outwards to form an arc angle 9. The arc angle 9 and the static contact 3 are of an integral structure. The integral type of the arc angle 9 simplifies the processing technology.
[0018] In summary, the contact structure of this circuit breaker has the characteristics of being compact, having a large electro-dynamic repulsive force, and being noiseless. It solves the problem of poor breaking capacity of the circuit breaker. The static contact is designed in a "U" shape, enabling the currents of the moving and static contacts to flow in opposite directions to form a repulsive force; by adding magnetic conductive sheets, the electro-dynamic repulsive force is enhanced; through the setting of fixing glue, the parts are strengthened to prevent the parts from vibrating due to electromagnetic force.
[0019] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the basic characteristics of the utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
[0020] In short, the above are only specific embodiments of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the field of the present utility model are covered by the patent scope of the present utility model.
Claims
1. A circuit breaker contact structure, characterized in that: It includes a base (1), at least one partition chamber (2) is provided inside the base (1), a static contact (3) is provided inside the partition chamber (2), a moving contact (4) rotatably connected to the base (1) is provided on the static contact (3), the cross-section of the static contact (3) is in a "U" - shaped structure, one end of the static contact (3) is in contact with or separated from the moving contact (4), a wiring terminal (5) is provided at the other end of the static contact (3), a number of magnetically conductive sheets (6) are arranged side by side inside the static contact (3), and a fixing glue (7) adhered to the magnetically conductive sheets (6) is provided at the bottom of the partition chamber (2).
2. The contact structure of a circuit breaker according to claim 1, characterized in that: An insulating tape (8) for fixedly covering the magnetically conductive sheet (6) is provided on the outer ring of the magnetically conductive sheet (6).
3. A circuit breaker contact structure according to claim 1, characterized in that: The material of the magnetically conductive sheet (6) is iron and its thickness is less than 3 mm.
4. A circuit breaker contact structure according to claim 1, characterized in that: An arc angle (9) integrally extending with the static contact (3) is provided at the end of the static contact (3) in contact with the moving contact (4).
5. The contact structure of a circuit breaker according to claim 1, characterized in that: The wiring terminal (5) is in an integral structure with one end of the static contact (3) and is in a "Z" - shaped structure.