Static contact of circuit breaker

Abstract

The utility model relates to a static contact of a circuit breaker. The technical problem to be solved by the utility model is to provide the static contact of the circuit breaker. According to the technical scheme, the static contact comprises a static contact external connection piece, a static contact contact piece and a contact point, the static contact external connection piece comprises an external connection piece external connection part, the external connection piece external connection part is bent downwards in an inclined mode to form an external connection piece middle connection part, the external connection piece middle connection part is bent in sequence to form an external connection piece sinking part and an external connection piece limiting head, and the external connection piece sinking part and the external connection piece limiting head are connected in an inclined mode. The static contact contact piece comprises a contact piece external connection part, and the contact piece external connection part is vertically bent downwards to form a contact piece butt joint part. The utility model has the advantages that the static contact of the circuit breaker adopts a split type structure, the external connecting piece of the static contact adopts an iron material, and the contact piece of the static contact adopts a copper material, so that the material cost proportion is obviously reduced, and the resource waste is reduced; and the butt joint of the static contact external connection piece and the static contact contact piece adopts a double connection mode of welding and riveting, so that the service life of the static contact is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to a stationary contact of a circuit breaker. Background Technology

[0002] The stationary contact of a miniature circuit breaker is a core component used in conjunction with the moving contact to achieve circuit continuity. The stationary contact of a miniature circuit breaker consists of the stationary contact body and the contact point. Traditionally, the stationary contact body is mostly made of pure copper using a one-piece stamping process. Pure copper is widely used due to its high conductivity and wear resistance, but its high price leads to high manufacturing costs. With intense market competition, how to reduce product costs while ensuring product safety and compliance with regulations, and simultaneously achieving a stable, reliable structure with a long service life, is a key research and development direction in this industry. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a stationary contact for a circuit breaker.

[0004] The technical solution adopted by the stationary contact of this utility model circuit breaker is characterized by comprising a stationary contact outer component, a stationary contact contact component, and a contact point. The stationary contact outer component includes a horizontally arranged outer component portion, which is bent downwards to form a middle portion. The middle portion is then bent sequentially to form a recessed portion parallel to the middle portion and a limiting head perpendicular to the recessed portion. The stationary contact contact component includes a horizontally arranged outer contact component portion, which is bent downwards vertically to form a contact point for welding. The contact component mating portion is formed by bending inwards to form a contact component arc portion and a contact component welding portion arranged parallel to the outer component recessed portion. The contact component welding portion is bent vertically to form a contact component positioning portion. The contact component welding portion is provided with a contact component limiting port. The contact component positioning portion is provided with a positioning portion slot for locking onto the outer component recessed portion. The outer component limiting head is riveted to the contact component limiting port. The back side of the contact component welding portion is welded to the upper end face of the outer component recessed portion.

[0005] The external component of the stationary contact is made of iron, and the contact component of the stationary contact is made of copper.

[0006] The external connector limiting head has a square structure with limiting head protrusions on its front and rear sides, and the inner wall of the contact limiting opening has a contact reinforcing groove corresponding to the limiting head protrusions.

[0007] The upper end face of the recessed part of the external connector is provided with a front protruding edge and a rear protruding edge of the recessed part, and the back side of the welding part of the contact member is provided with a front groove of the welding part corresponding to the front protruding edge of the recessed part and a rear groove of the welding part corresponding to the rear protruding edge of the recessed part.

[0008] The outer part of the contact is provided with a contact guide protrusion for positioning during installation inside the circuit breaker housing.

[0009] The contact mating part is provided with a mating part positioning groove for positioning the contact point during welding.

[0010] The advantages of this utility model of the circuit breaker stationary contact are as follows: The circuit breaker stationary contact adopts a split structure. The external component of the stationary contact is made of iron, which undertakes the functions of mechanical support and installation. The contact component of the stationary contact is made of copper and is used for conductive and contact areas. The cost of iron is much lower than that of pure copper, which significantly reduces the proportion of material cost. Copper is only used in key conductive parts, which effectively reduces the overall cost of the product and reduces resource waste. The external component and the contact component of the stationary contact adopt a dual connection method of welding and riveting, which ensures the mechanical strength of the connection and the contact reliability of the welded contact surface, effectively improving the service life of the stationary contact. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of the stationary contact of the circuit breaker of this utility model;

[0013] Figure 2 This is a structural schematic diagram of the static contact external component of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of a static contact element of this utility model;

[0015] Figure 4 This is another structural schematic diagram of the static contact element of this utility model. Detailed Implementation

[0016] like Figure 1-4As shown, the circuit breaker stationary contact of this utility model includes a stationary contact outer component 1, a stationary contact contact component 2, and a contact point 3. The stationary contact outer component 1 includes a horizontally arranged outer component outer part 5, which is bent downwards to form an outer component middle part 6. The outer component middle part 6 is bent sequentially to form an outer component recessed part 7 parallel to the outer component middle part 6 and an outer component limiting head 8 perpendicular to the outer component recessed part 7. The stationary contact contact component 2 includes a horizontally arranged contact component outer part 10, which is bent vertically downwards to form a contact component mating part 11 for welding the contact point 3. The contact component mating part 11 is bent inwards to form a contact component arc part 12 and a contact component welding part 13 parallel to the outer component recessed part 7. The contact component welding part 13 is bent vertically to form a contact component positioning part 14. The circuit breaker stationary contact is provided with a contact limiting port 15 on the 13, and the contact positioning part 14 is provided with a positioning part slot 16 for locking on the external part recess 7. The external part limiting head 8 is riveted to the contact limiting port 15. The back of the contact welding part 13 is welded to the upper end face of the external part recess 7. The circuit breaker stationary contact adopts a split structure. At the joint of the stationary contact external part 1 and the stationary contact part 2, a dual connection method of welding and riveting is adopted to ensure the mechanical strength of the connection and the contact reliability of the welded contact surface, which effectively improves the service life of the stationary contact. The stationary contact external part 1 is made of iron and undertakes the mechanical support and installation functions. The stationary contact part 2 is made of copper and is used for conductive and contact areas. The cost of iron is much lower than that of pure copper, which significantly reduces the proportion of material cost. Copper is only used in key conductive parts, which effectively reduces the overall cost of the product and reduces resource waste.

[0017] The external connector limiting head 8 has a square structure with limiting head protrusions 18 on its front and rear sides. The inner wall of the contact limiting port 15 is provided with a contact reinforcing groove 19 corresponding to the limiting head protrusions 18, which makes the riveting more secure and reliable and reduces the risk of loosening.

[0018] The upper end face of the recessed part 7 of the external component is provided with a front protruding edge 20 and a rear protruding edge 21 of the recessed part. The back of the welding part 13 of the contact component is provided with a front groove 23 of the welding part corresponding to the front protruding edge 20 of the recessed part and a rear groove 24 of the welding part corresponding to the rear protruding edge 21 of the recessed part. This enhances the contact tightness of the welding point, reduces contact resistance fluctuations, effectively prevents incomplete welding, and extends the service life of the product.

[0019] The contact external portion 10 is provided with a contact guide protrusion 25 for positioning within the circuit breaker housing, simplifying the assembly process.

[0020] The contact part 11 is provided with a positioning groove 26 for positioning the contact 3 during welding, which ensures accurate positioning and facilitates welding.

[0021] 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 and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A stationary contact of a circuit breaker, characterized in that: The device includes a stationary contact external component (1), a stationary contact contact component (2), and a contact point (3). The stationary contact external component (1) includes a horizontally arranged external component external part (5), which is bent downwards to form an external component middle part (6). The external component middle part (6) is bent in sequence to form an external component recessed part (7) parallel to the external component middle part (6) and an external component limiting head (8) perpendicular to the external component recessed part (7). The stationary contact contact component (2) includes a horizontally arranged contact component external part (10), which is bent downwards vertically to form a contact component mating part for welding the contact point (3). (11) The contact part (11) is bent inward to form a contact part arc (12) and a contact part welding part (13) arranged parallel to the outer part sinking part (7). The contact part welding part (13) is bent vertically to form a contact part positioning part (14). The contact part welding part (13) is provided with a contact part limiting port (15). The contact part positioning part (14) is provided with a positioning part slot (16) for locking on the outer part sinking part (7). The outer part limiting head (8) is riveted to the contact part limiting port (15). The back of the contact part welding part (13) is welded together with the upper end face of the outer part sinking part (7).

2. The stationary contact of the circuit breaker according to claim 1, characterized in that: The stationary contact external component (1) is made of iron, and the stationary contact contact component (2) is made of copper.

3. The stationary contact of the circuit breaker according to claim 1, characterized in that: The external component limiting head (8) has a square structure, with limiting head protrusions (18) on its front and rear sides, and the inner wall of the contact component limiting port (15) is provided with a contact component reinforcing groove (19) corresponding to the limiting head protrusions (18).

4. The stationary contact of the circuit breaker according to claim 1, characterized in that: The upper end face of the recessed part (7) of the external component is provided with a front protruding edge (20) and a rear protruding edge (21). The back side of the welding part (13) of the contact component is provided with a front groove (23) corresponding to the front protruding edge (20) of the recessed part and a rear groove (24) corresponding to the rear protruding edge (21) of the recessed part.

5. The stationary contact of the circuit breaker according to claim 1, characterized in that: The contact outer portion (10) is provided with a contact guide protrusion (25) for positioning inside the circuit breaker housing.

6. The stationary contact of the circuit breaker according to claim 1, characterized in that: The contact mating part (11) is provided with a mating part positioning groove (26) for positioning the contact (3) during welding.

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