Moving contact assembly of miniature circuit breaker

Abstract

The utility model discloses a moving contact assembly of a miniature circuit breaker, and relates to the technical field of circuit breakers, the moving contact assembly comprises a linkage sheet and a moving contact sheet which are matched and abutted, one end of the moving contact sheet is integrally provided with a welding spot, the welding spot is internally provided with an accommodating groove used for accommodating a lead, the linkage sheet is internally provided with a first rivet hole, and the linkage sheet is internally provided with a second rivet hole. A second rivet hole is arranged in the moving contact piece, and a rivet is riveted between the first rivet hole of the linkage piece and the second rivet hole of the moving contact piece. According to the utility model, the welding spot is arranged on the movable contact piece, and the accommodating groove for accommodating the wire is arranged on the welding spot, so that the wire can be positioned during welding, the welding area between the wire and the movable contact piece is increased, the convenience and the stability of wire welding are further improved, the first riveting hole and the second riveting hole can be quickly aligned through the positioning mechanism, and the welding efficiency is improved. And a worker can conveniently insert rivets into the first riveting holes and the second riveting holes for riveting, and convenience and rapidness are achieved.

Description

Technical Field

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

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified timeframe. Miniature circuit breakers, a common type of circuit breaker, are widely used in homes, industries, and businesses.

[0003] The miniature circuit breaker includes a moving contact assembly and a static contact. The moving contact assembly is usually connected to the load end, and the static contact is usually connected to the power supply. When the moving contact and the static contact of the moving contact assembly are closed, the electrical switch is turned on and the load is connected to the power supply; when the moving contact and the static contact of the moving contact assembly are disconnected, the electrical switch is disconnected and the load is disconnected from the power supply.

[0004] The moving contact assembly of a circuit breaker is a key part of the circuit breaker. It is responsible for quickly disconnecting the circuit when an abnormality occurs in the circuit to protect electrical equipment from damage. Its performance directly affects the overall performance and safety of the circuit breaker. However, traditional moving contact assemblies often fail to fully consider the needs and convenience of welding wires, resulting in abnormal operation of the circuit breaker due to poor welding during actual use. There is room for improvement. Utility Model Content

[0005] The present invention addresses the drawback that conventional moving contact assemblies often fail to fully consider the requirements and convenience of welding wires, resulting in abnormal operation of the circuit breaker due to poor welding during actual use. A moving contact assembly for a miniature circuit breaker is provided. The specific technical solution is as follows:

[0006] A moving contact assembly of a small circuit breaker includes a linkage piece and a moving contact piece that are matingly abutted, a weld point integrally formed at one end of the moving contact piece, a receiving groove for accommodating a wire being provided in the weld point, a first rivet hole being provided in the linkage piece, a second rivet hole being provided in the moving contact piece, a rivet being riveted between the first rivet hole of the linkage piece and the second rivet hole of the moving contact piece, and a positioning mechanism being provided between the linkage piece and the moving contact piece for aligning the first rivet hole with the second rivet hole to facilitate riveting.

[0007] By adopting the above technical solution, by setting a welding point on the moving contact piece and opening a receiving groove for accommodating the wire on the welding point, the wire can be positioned during welding, and the welding area between the wire and the moving contact piece is increased, thereby improving the convenience and stability of wire welding. The first rivet hole and the second rivet hole can be quickly aligned through the positioning mechanism, making it convenient for the staff to insert the rivet into the first rivet hole and the second rivet hole for riveting.

[0008] Optionally, a through hole for connecting to a circuit breaker connecting rod is provided at one end of the movable contact piece.

[0009] By adopting the above technical solution, one end of the connecting rod of the small circuit breaker is inserted into the handle and the other end is inserted into the through hole, so that when the handle is rotated, the linkage piece can move accordingly, thereby causing the moving contact piece to swing toward or away from the static contact piece to realize the circuit on and off.

[0010] Optionally, a second connection hole is provided in the movable contact piece, and a first connection hole aligned with the second connection hole is provided in the linkage piece.

[0011] By adopting the above technical solution, a connecting column can be provided through the first connecting hole of the linkage piece and the second connecting hole of the movable contact piece, and the connecting column can connect the linkage piece and the movable contact piece.

[0012] Optionally, a pulling hole for a tension detection device to pass through is formed at one end of the movable contact piece away from the second connecting hole.

[0013] By adopting the above technical solution, the pulling hole can be used for the tension equipment to pass through, so as to perform tension testing on the product and determine whether the product meets the standards.

[0014] Optionally, widened portions are integrally formed on both sides of one end of the movable contact piece close to the pulling hole.

[0015] By adopting the above technical solution, the widened portion can increase the contact area between the moving contact piece and the static contact piece, thereby improving the stability of the moving contact assembly during operation.

[0016] Optionally, a limiting hole is provided in the end of the linkage piece away from the through hole, and a slot is provided on the side of the movable contact piece close to the linkage piece, and the positioning mechanism includes a limiting rod movably arranged in the corresponding limiting hole, a rubber block fixed at one end of the limiting rod and engaged in the slot, and a top block fixed at the other end of the limiting rod and engaged with the outer wall of the linkage piece.

[0017] By adopting the above technical solution, the rubber clamping block can be inserted into the clamping slot to quickly align the first rivet hole and the second rivet hole, thereby facilitating riveting.

[0018] Optionally, a notch is provided in the top block, and the surface of the top block is coated with fluorescent paint.

[0019] By adopting the above technical solution, the positioning mechanism composed of components such as the rubber clamp block can be pulled out from the linkage piece and the dynamic contact piece as a whole for reuse, thereby improving the utilization rate of resources.

[0020] In summary, the present invention has at least one of the following beneficial effects:

[0021] 1. By setting a welding point on the moving contact piece and providing a receiving groove for accommodating the wire on the welding point, the wire can be positioned during welding, and the welding area between the wire and the moving contact piece is increased, thereby improving the convenience and stability of wire welding. The first rivet hole and the second rivet hole can be quickly aligned through the positioning mechanism, making it convenient for workers to insert the rivet into the first rivet hole and the second rivet hole for riveting, which is convenient and quick.

[0022] 2. The pulling hole can be used for the insertion of tensile equipment to conduct tensile testing on the product and determine whether the product meets the standards. The widened portion can increase the contact area between the moving contact piece and the static contact piece, thereby improving the stability of the moving contact assembly during operation. The rubber card block inserted into the card slot can quickly align the first rivet hole and the second rivet hole, facilitating riveting. The positioning mechanism composed of the rubber card block and other components can be pulled out of the linkage piece and the moving contact piece as a whole for reuse, thereby improving resource utilization and reducing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the movable contact piece of the utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of the linkage piece of the utility model;

[0027] Figure 5 This utility model Figure 2 A magnified view of the structure in the middle.

[0028] Explanation of the accompanying drawings: 1. Linkage piece; 11. First rivet hole; 12. Through hole; 13. First connecting hole; 14. Limiting hole; 2. Moving contact piece; 21. Second rivet hole; 22. Second connecting hole; 23. Pull hole; 24. Widened portion; 25. Slot; 3. Welding point; 31. Accommodating slot; 4. Rivet; 5. Limiting rod; 51. Rubber block; 52. Top block; 53. Notch. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 The utility model is described in further detail.

[0030] The present invention discloses a movable contact assembly of a miniature circuit breaker. Figure 1-3 , including a linkage piece 1 and a moving contact piece 2 riveted to each other, the linkage piece 1 and the moving contact piece 2 are in contact with each other, the linkage piece 1 and the moving contact piece 2 are both made of metal, and the linkage piece 1 is a double-layer structure.

[0031] Reference Figure 1-3 One end of the moving contact piece 2 is provided with a through hole 12 for connecting the circuit breaker connecting rod. The through hole 12 can be a round hole. One end of the connecting rod of the miniature circuit breaker is inserted on the handle and the other end is inserted in the through hole 12, so that when the handle is rotated, the linkage piece 1 can move accordingly, thereby causing the moving contact piece 2 to swing toward or away from the static contact piece to realize the on and off of the circuit. The connecting rod and other components in the miniature circuit breaker are common structures in the miniature circuit breaker and belong to the public technology, so no further details will be given here.

[0032] Reference Figure 2-4 A second connecting hole 22 is provided in the movable contact piece 2, and a first connecting hole 13 aligned with the second connecting hole 22 is provided in the linkage piece 1. A connecting column can be provided through the first connecting hole 13 of the linkage piece 1 and the second connecting hole 22 of the movable contact piece 2. The connecting column can connect the linkage piece 1 and the movable contact piece 2, wherein the first connecting hole 13 can be a circular hole, and the diameter of the first connecting hole 13 is smaller than the width of the second connecting hole 22, so that the connecting column can move in a small range on the movable contact piece 2, thereby realizing a small range of rotation between the linkage piece 1 and the movable contact piece 2.

[0033] Reference Figure 1-3 A pulling hole 23 for the tension detection equipment to pass through is opened at one end of the moving contact piece 2 away from the second connecting hole 22. The pulling hole 23 on the moving contact piece 2 can be used for the tension test hook of the tension detection equipment to pass through, so as to facilitate the tension detection of the product. According to the detected tension information, it can be judged whether the product meets the standard.

[0034] Reference Figure 1 and Figure 3 The moving contact piece 2 is integrally formed with widened portions 24 on both sides of one end close to the pulling hole 23. The widened portions 24 are integrally formed on both sides of one end of the moving contact piece 2, which is beneficial to increasing the contact area between the moving contact piece 2 and the static contact piece, and improving the stability of the moving contact assembly during operation.

[0035] Reference Figure 2-4 A welding spot 3 is integrally formed at one end of the moving contact piece 2, and a receiving groove 31 for accommodating the wire is opened in the welding spot 3. By arranging the welding spot 3 on the moving contact piece 2 and opening the receiving groove 31 for accommodating the wire on the welding spot 3, the wire can be positioned during welding, and the contact area between the wire and the moving contact piece 2 during welding is increased. After the welding spot 3 melts during welding, the welding area between the wire and the moving contact piece 2 can be increased, thereby improving the convenience and stability of wire welding.

[0036] Reference Figure 1 、 Figure 2 and Figure 4A first rivet hole 11 is provided in the linkage piece 1, and a second rivet hole 21 is provided in the movable contact piece 2. A rivet 4 is riveted between the first rivet hole 11 of the linkage piece 1 and the second rivet hole 21 of the movable contact piece 2. The rivet 4 can pass through both the first rivet hole 11 and the second rivet hole 21 to rivet the linkage piece 1 and the movable contact piece 2. After riveting, due to the connection of the rivet 4, the linkage piece 1 and the movable contact piece 2 can rotate relative to each other.

[0037] Reference Figure 1 、 Figure 2 and Figure 5 A positioning mechanism is provided between the linkage piece 1 and the moving contact piece 2 for aligning the first rivet hole 11 and the second rivet hole 21 to facilitate riveting. A limiting hole 14 is provided in the end of the linkage piece 1 away from the through hole 12, and a slot 25 is provided on the side of the moving contact piece 2 close to the linkage piece 1. The first rivet hole 11 and the second rivet hole 21 are quickly aligned by the positioning mechanism, which makes it convenient for the staff to quickly insert the rivet into the first rivet hole 11 and the second rivet hole 21 for riveting, which is convenient and quick.

[0038] Reference Figure 1 、 Figure 2 and Figure 5 The positioning mechanism includes a limiting rod 5 movably arranged in the corresponding limiting hole 14, a rubber block 51 fixedly arranged at one end of the limiting rod 5 and engaged in the card slot 25, and a top block 52 fixedly arranged at the other end of the limiting rod 5 and abutting against the outer wall of the linkage piece 1. The rubber block 51 is spherical, and the diameter of the spherical rubber block 51 is larger than the diameter of the limiting rod 4. The rubber block 51 is made of rubber and has elasticity and can be inserted into the card slot 25 of the moving contact piece 2.

[0039] By inserting the rubber card block 51 into the corresponding card slot 25 and cooperating with the abutment between the linkage piece 1 and the moving contact piece 2, the linkage piece 1 and the moving contact piece 2 can be temporarily fixed, and the first rivet hole 11 and the second rivet hole 21 can be quickly aligned, making it convenient for the staff to quickly insert the rivet into the first rivet hole 11 and the second rivet hole 21 for riveting.

[0040] Reference Figure 2 、 Figure 4 and Figure 5 A notch 53 is provided in the top block 52, and the surface of the top block 52 is coated with fluorescent paint. After riveting, the staff can insert a fingernail into the notch 53 and pull the top block 52 vigorously to the side away from the linkage piece 1. At this time, the rubber block 51 will be shaped so that it can be separated from the rubber block 51 and the limiting hole 14, thereby pulling out the positioning mechanism composed of the rubber block 51, the limiting rod 5 and the top block 52 from the linkage piece 1 and the dynamic contact piece 2 as a whole. It can be reused many times, improve the utilization rate of resources, and reduce waste. The staff can use fluorescence to find the positioning mechanism composed of the top block 52 and other components in a darker setting.

[0041] The implementation principle of the movable contact assembly of a miniature circuit breaker in the embodiment of the present utility model is as follows:

[0042] During assembly, first assemble the linkage piece 1 and the movable contact piece 2, then press the top block 52 so that the rubber block 51 can be inserted into the corresponding slot 25. With the abutment of the linkage piece 1 and the movable contact piece 2, the linkage piece 1 and the movable contact piece 2 can be temporarily fixed, and the first rivet hole 11 and the second rivet hole 21 can be quickly aligned, making it easier for the staff to quickly insert the rivet into the first rivet hole 11 and the second rivet hole 21 to rivet the linkage piece 1 and the movable contact piece 2;

[0043] After riveting, the staff can insert a fingernail into the notch 53 and vigorously pull the top block 52 toward the side away from the linkage piece 1. At this time, the rubber block 51 will be shaped so that it can be separated from the rubber block 51 and the limiting hole 14. In this way, the positioning mechanism composed of the rubber block 51 and other components can be pulled out of the linkage piece 1 and the movable contact piece 2 as a whole for reuse.

[0044] Then, a connecting post is provided through the first connecting hole 13 of the linkage piece 1 and the second connecting hole 22 of the movable contact piece 2. The connecting post connects the linkage piece 1 and the movable contact piece 2, and the wire is placed in the receiving groove 31 of the solder joint 3. When the solder joint 3 melts during welding, the welding area between the wire and the movable contact piece 2 is increased, thereby improving the convenience and stability of wire welding.

[0045] Then one end of the connecting rod of the miniature circuit breaker is inserted into the handle and the other end is inserted into the through hole 12, so that when the handle is rotated, the linkage piece 1 can move accordingly, thereby causing the moving contact piece 2 to swing towards or away from the static contact piece to realize the on and off of the circuit.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A moving contact assembly of a miniature circuit breaker, comprising a linkage piece (1) and a moving contact piece (2) in abutting engagement, characterized in that: A welding point (3) is integrally formed at one end of the movable contact piece (2), and a receiving groove (31) for receiving a wire is provided in the welding point (3). A first rivet hole (11) is provided in the linkage piece (1), and a second rivet hole (21) is provided in the movable contact piece (2). A rivet (4) is riveted between the first rivet hole (11) of the linkage piece (1) and the second rivet hole (21) of the movable contact piece (2). A positioning mechanism is provided between the linkage piece (1) and the movable contact piece (2) for aligning the first rivet hole (11) and the second rivet hole (21) to facilitate riveting.

2. The movable contact assembly of a miniature circuit breaker according to claim 1, characterized in that: One end of the movable contact piece (2) is provided with a through hole (12) for connecting to a circuit breaker connecting rod.

3. The movable contact assembly of a miniature circuit breaker according to claim 2, characterized in that: A second connection hole (22) is provided in the movable contact piece (2), and a first connection hole (13) aligned with the second connection hole (22) is provided in the linkage piece (1).

4. The movable contact assembly of a miniature circuit breaker according to claim 3, characterized in that: A pulling hole (23) for a pulling force detection device to pass through is provided on one end of the movable contact piece (2) away from the second connecting hole (22).

5. The movable contact assembly of a miniature circuit breaker according to claim 4, characterized in that: Widened portions (24) are integrally formed on both sides of one end of the movable contact piece (2) close to the pulling hole (23).

6. The movable contact assembly of a miniature circuit breaker according to claim 2, characterized in that: A limiting hole (14) is provided in one end of the linkage piece (1) away from the through hole (12), and a clamping slot (25) is provided on one side of the movable contact piece (2) close to the linkage piece (1).

7. The movable contact assembly of a miniature circuit breaker according to claim 6, characterized in that: The positioning mechanism comprises a limiting rod (5) movably arranged in a matching limiting hole (14), a rubber clamping block (51) fixedly arranged at one end of the limiting rod (5) and cooperating with the clamping slot (25), and a top block (52) fixedly arranged at the other end of the limiting rod (5) and cooperating with the outer wall of the linkage piece (1).

8. The movable contact assembly of a miniature circuit breaker according to claim 7, characterized in that: A notch (53) is provided in the top block (52), and the surface of the top block (52) is coated with fluorescent paint.

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