Conductive assembly and circuit breaker

Abstract

A conductive component and circuit breaker include: a moving contact and a mounting bracket. The moving contact includes at least one contact blade. The mounting bracket includes a support and a first rotating shaft. The support includes a base and a shaft seat integrally formed at a first end of the base. The shaft seat has a shaft mounting hole, and the first rotating shaft is disposed within the shaft mounting hole. At least one contact blade is rotatably mounted on the shaft seat via the first rotating shaft. The mounting bracket also includes a first bent portion integrally formed with a second end of the base and sequentially bent and connected, a thermal element, and a terminal block. The first bent portion includes a tripping mounting structure for mounting a protection mechanism. The terminal block includes a power mounting structure for connecting to a load or power source. The integral design of the shaft seat, base, first bent portion, thermal element, and terminal block ensures the consistency of the cross-sectional area of ​​the entire mounting bracket, avoids temperature rise at the connection points of various components, and thus reduces the overall temperature rise of the mounting bracket.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a conductive component and a circuit breaker. Background Technology

[0002] The contact system of existing circuit breakers includes contact blades, bearings, and thermal elements. These components are assembled as individual parts, which makes the internal parts of the contact system complex and difficult to assemble. Moreover, due to the limitations of product size, the overall thickness of the bearing is relatively thin. After the bearing is connected to the thermal element through the base, it is prone to heat accumulation, which leads to an increase in temperature. This results in an overall increase in the temperature of the contact system, affecting the normal use of the circuit breaker. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a conductive component and circuit breaker that reduces temperature rise.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this application provides a conductive component, including: a moving contact and a mounting bracket, the moving contact including at least one contact blade, the mounting bracket including a support and a first rotating shaft, the support including a base and a shaft seat integrally formed at a first end of the base, the shaft seat having a shaft mounting hole, the first rotating shaft being disposed in the shaft mounting hole, and at least one contact blade being rotatably disposed on the shaft seat via the first rotating shaft;

[0006] The mounting bracket further includes a first bent portion integrally formed with the second end of the base and sequentially bent and connected, a heating element, and a terminal block. The first bent portion includes a tripping mounting structure, and a protection mechanism is mounted on the first bent portion through the tripping mounting structure. The protection mechanism includes a bimetallic strip, an armature, an armature frame, a second elastic element, and a magnetic yoke. The bimetallic strip and the magnetic yoke are respectively mounted on both sides of the first bent portion. The armature frame is mounted between the bimetallic strip and the first bent portion. The armature is rotatably mounted on the armature frame. The second elastic element is mounted between the armature and the armature frame. The terminal block includes a power mounting structure for connecting to a load or power source.

[0007] In one possible implementation, the base, the heating element, and the terminal block are parallel to each other, a second bend is provided between the heating element and the terminal block, the length of the heating element is greater than the length of the terminal block, and the distance between the plane of the terminal block and the plane of the base is less than the distance between the plane of the heating element and the plane of the base.

[0008] In one possible implementation, the moving contact includes at least two stacked contact blades, with a magnetic shield and a first elastic member disposed between two adjacent contact blades. The magnetic shield includes a first through hole, and the first elastic member is located within the first through hole with both ends extending out of the first through hole. The two contact blades clamp the first elastic member.

[0009] In one possible implementation, the magnetic shielding element is a sheet-like structure, the first elastic element includes two disc springs, each disc spring including a second through hole, the first rotating shaft passing through the second through hole, with both ends extending from opposite sides of the two contact blades.

[0010] In one possible implementation, the mounting bracket is formed by stacking at least two mounting bracket pieces.

[0011] In one possible implementation, the bearing includes a first sidewall and a second sidewall that are arranged opposite to each other and spaced apart in parallel, at least one contact blade is connected between the first sidewall and the second sidewall, the bearing mounting hole is provided on the first sidewall and the second sidewall, and the first sidewall and the second sidewall include contact blade arc-shaped mounting portions that extend out of the base in a direction away from the first bend.

[0012] In one possible implementation, the armature frame includes a riveting hole and a second contact spring mounting portion at both ends. The second contact spring mounting portion includes two opposing second shaft mounting plates. The second shaft passes through the two second shaft mounting plates and connects to the armature. Two first notches are provided on opposite sides of the two second shaft mounting plates. A first limiting protrusion for limiting and cooperating with the armature is provided on the outer side of the first notch near the riveting hole. A first limiting arm abuts against the first end of the second elastic member on the side of the first notch away from the riveting hole. The second end of the second elastic member abuts against the armature.

[0013] In one possible implementation, the armature includes two relatively parallel and spaced rocker arm side plates, with a first force plate connected between the two rocker arm side plates. The first force plate is located at one opposite end of the two rocker arm side plates and is perpendicular to the rocker arm side plates. The first force plate and the second end of the second elastic member abut against each other. A second pivot mounting hole is provided at one end of the two rocker arm side plates away from the first force plate, and the two second pivot mounting holes of the two rocker arm side plates are opposite each other.

[0014] A second limiting protrusion is provided between the second pivot mounting hole of the rocker arm side plate and one end connected to the first force plate. The two second limiting protrusions of the two rocker arm side plates are opposite to each other, and the two second limiting protrusions abut against the two first limiting protrusions respectively.

[0015] A tripping drive rod extends from the side of the first force plate away from the base in a direction away from the base. The length direction of the bimetallic strip is perpendicular to the base. The projections of the bimetallic strip and the tripping drive rod toward the first bend are misaligned.

[0016] Secondly, this application provides a circuit breaker, including a handle mechanism, an operating mechanism, a stationary contact, the aforementioned conductive components, and a contact shaft; the moving contact of the conductive components is connected to the contact shaft, and at least one contact spring is provided between the moving contact and the contact shaft; the operating mechanism is connected to the contact shaft, and the handle mechanism is connected to the operating mechanism. The handle mechanism drives the operating mechanism to rotate the contact shaft, thereby causing the moving contact to rotate and close or open with the stationary contact.

[0017] In one possible implementation, at least one contact spring is provided between the contact spring and the moving contact. The contact shaft includes a third through hole. One end of the contact blade for contacting the stationary contact is the contact end, and the other end for connecting with the shaft seat is the mounting end. The shaft seat extends at least partially into the third through hole. The mounting end is rotatably mounted in the contact shaft and connected to the shaft seat via a first shaft. The contact end extends out from the third through hole. A drive rod passes through the mounting end along the thickness direction of the contact blade, and both ends extend out from both sides of the mounting end and connect to the contact spring support.

[0018] In one possible implementation, the contact spring support includes a contact spring mounting portion and a contact blade driving portion located at both ends. The contact spring mounting portion is rotatably mounted in the contact shaft via a third rotating shaft. The contact blade driving portion includes two contact blade driving arms and a contact blade clearance notch located between the two contact blade driving arms. The thickness side of the contact blade can extend into the contact blade clearance notch. The two contact blade driving arms abut against both ends of the driving rod, respectively.

[0019] The contact drive arm includes a repulsion locking area and a closing / opening drive area that are bent and connected. The repulsion locking area is located at the end away from the contact spring mounting part.

[0020] When the opening and closing drive area comes into contact with the drive rod, the contact spring bracket drives the moving contact to rotate in the first direction and limit it to the contact shaft through the drive rod. The operating mechanism drives the contact shaft to rotate, and the contact shaft drives the moving contact to swing and contact and separate from the stationary contact.

[0021] When the repulsion locking zone abuts against the drive rod, the contact spring bracket drives the moving contact to rotate in the second direction via the drive rod and limits it to the contact shaft, so that the moving contact is in a state of force balance and completes self-locking; wherein, the first direction and the second direction are opposite.

[0022] In one possible implementation, the contact spring support includes at least one pressure plate. The pressure plate includes a first pressure plate wall, a second pressure plate wall, and a contact spring connecting wall that are bent and connected in sequence. The first pressure plate wall and the second pressure plate wall are spaced apart and arranged in parallel, forming a "U"-shaped groove between the first pressure plate wall and the second pressure plate wall. The second pressure plate wall and the contact spring connecting wall are perpendicularly connected and perpendicular to the top surface of the "U"-shaped groove. The mounting end of the contact blade includes a first driving part that protrudes to one side along the width direction of the contact blade. The thickness side of the first driving part extends into the "U"-shaped groove. The driving rod passes through the first pressure plate wall, the second pressure plate wall, and the first driving part. Both ends extend from opposite sides of the first pressure plate wall and the second pressure plate wall. The upper and lower sides of the contact spring connecting wall are bent toward the contact spring to form a limiting wall.

[0023] Compared to existing technologies, the mounting bracket for the conductive components in this application includes an integrally formed bearing, base, first bending portion, heating element, and terminal block. The base, first bending portion, heating element, and terminal block are sequentially bent and connected. Through the integrally formed design of the bearing, base, first bending portion, heating element, and terminal block, the consistency of the cross-sectional area of ​​the entire mounting bracket is ensured, and the temperature rise at the connection points of each component is avoided, thereby reducing the overall temperature rise of the mounting bracket.

[0024] Furthermore, the base, heating element, and terminal block are parallel to each other, and a second bending portion is provided between the heating element and the terminal block. The length of the heating element is greater than the length of the terminal block, and the distance between the plane of the terminal block and the plane of the base is less than the distance between the plane of the heating element and the plane of the base. This increases the length of the heating element, and the terminal block after being bent by the second bending portion is easier to fix and easier to connect to the conductor of the load or power supply, making assembly convenient.

[0025] Furthermore, the moving contact includes at least two stacked contact blades, with a magnetic shielding element and a first elastic element disposed between the at least two contact blades. The magnetic shielding element includes a first through hole, and the first elastic element is located within the first through hole with both ends extending out of the first through hole. The two contact blades clamp the first elastic element. The magnetic shielding element is used to reduce the temperature rise caused by the eddy current effect between the contact blades and the bearing, ensuring the reliable operation of the contact system. The magnetic shielding element prevents the two contact blades from being in contact; instead, they are connected through the first elastic element. Each contact blade individually contacts the bearing to limit the current, thereby reducing the temperature rise caused by the eddy current effect between the contact blades and the bearing, and ensuring the reliable operation of the contact system.

[0026] In addition, the mounting bracket is composed of at least two mounting bracket pieces stacked together, which helps to increase the current carrying area of ​​the entire mounting bracket and optimize the temperature rise performance of the circuit breaker without increasing the overall thickness of the mounting bracket. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the connection structure between the conductive module and the contact shaft of this utility model, and an exploded view of the conductive components;

[0028] Figure 2 This is an exploded view of the first embodiment of the mounting bracket and protective mechanism of this utility model;

[0029] Figure 3 This is an exploded view of the second embodiment of the mounting bracket and protective mechanism of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the three contact shafts when the present invention has three protection electrode units;

[0031] Figure 5 This is a schematic diagram of the installation structure of the contact blade and drive rod of this utility model;

[0032] Figure 6 This is a structural schematic diagram of the mounting bracket of this utility model;

[0033] Figure 7 This is a schematic diagram of the armature frame of this utility model;

[0034] Figure 8 This is a schematic diagram of the structure of the magnetic yoke of this utility model;

[0035] Figure 9 This is a schematic diagram of the armature structure of this utility model;

[0036] Figure 10 This is a schematic diagram of the structure of the bimetallic sheet of this utility model;

[0037] Figure 11 This is a side view of the conductive module of this utility model;

[0038] Figure 12 This is a schematic diagram of the structure of the conductive module of this utility model;

[0039] Figure 13 This is a schematic diagram of the pressure plate in one embodiment of the contact spring bracket of this utility model;

[0040] Figure 14 This is a schematic diagram of another embodiment of the contact spring bracket of this utility model;

[0041] Figure 15 This is a schematic diagram of the structure of the present invention, showing the installation of two contact blades and two pressure plates;

[0042] The reference numerals in the attached figures include:

[0043] Moving contact 1;

[0044] Tentacle 11;

[0045] First drive unit 111; drive rod 112;

[0046] Mounting bracket 2;

[0047] 21. Bracket; 22. First rotating shaft; 23. Base; 24. Shaft seat; 25. Shaft mounting hole; 26. First bent part; 27. Heating element; 28. Terminal block; 29. ​​Mounting bracket;

[0048] First sidewall 241; Second sidewall 242;

[0049] Tripping installation structure 261;

[0050] Power supply mounting structure 281;

[0051] Magnetic shielding element 31; First elastic element 32;

[0052] 41. Bimetallic strip; 42. Armature; 43. Armature frame; 44. Second elastic element; 45. Magnetic yoke; 46. Second rotating shaft;

[0053] Rocker arm side plate 421; first force plate 422; second pivot mounting hole 423; second limiting protrusion 424; release drive rod 425;

[0054] Second pivot mounting plate 431; First notch 432; First limiting protrusion 433; First limiting arm 434;

[0055] Concave surface 451;

[0056] Contact shaft 51; shaft drive unit 52; contact spring support 53; contact spring 54;

[0057] Third through hole 511; Contact spring mounting groove 512; Alignment slope 513; Strip hole 514;

[0058] Contact spring mounting part 531; Contact knife clearance notch 532; Contact knife drive arm 533; Repulsion locking area 534; Opening and closing drive area 535; Third rotating shaft 536;

[0059] Pressure plate 537;

[0060] First pressure plate wall 5371; Second pressure plate wall 5372; Contact spring connecting wall 5373; Limiting wall 5374. Detailed Implementation

[0061] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0062] The circuit breaker includes a handle mechanism, an operating mechanism, a housing, and several protective pole units disposed within the housing. The protective pole units are either phase pole units or neutral pole units. Each phase pole unit includes a moving contact 1, a stationary contact, an arc-extinguishing mechanism, and a protection mechanism. The neutral pole unit typically includes a moving contact 1 and a stationary contact, but does not include an arc-extinguishing mechanism or a protection mechanism. The moving contact 1 is mounted on a contact shaft 51 via at least one contact spring 54. The contact shafts 51 of each protective pole unit are integrally formed or fixedly connected. The operating mechanism is connected to the contact shaft 51. The handle mechanism is connected to the operating mechanism. The handle mechanism drives the operating mechanism to rotate the contact shaft 51, thereby causing the moving contact 1 to rotate and close or open with the stationary contact. The arc-extinguishing mechanism is used to extinguish the arc between the moving contact 1 and the stationary contact. When a fault exists in the circuit of the corresponding phase unit, the protection mechanism triggers the operating mechanism to trip, causing the operating mechanism to disconnect the moving contact 1 from the stationary contact. The protection mechanism includes an overload protection mechanism and / or a short-circuit protection mechanism. The overload protection mechanism is typically a bimetallic strip 41 for overload protection, and the short-circuit protection mechanism is an electromagnetic trip unit for short-circuit protection. The protection mechanism can also be a thermomagnetic trip unit integrating overload and short-circuit protection; in this embodiment, the protection mechanism is a thermomagnetic trip unit. The circuit breaker typically includes at least one phase unit, with a neutral unit provided as needed. It should be noted that the neutral unit can also be equipped with the same arc-extinguishing and protection mechanisms as the phase units. Furthermore, the neutral unit can also be a straight plate without moving and stationary contacts, connecting the incoming and outgoing terminals; this is existing technology in the field.

[0063] like Figure 1 and Figure 6 As shown, the improvement of this application lies in providing a conductive component, which includes a moving contact 1 and a mounting bracket 2. The mounting bracket 2 is connected between the moving contact 1 and a load, or between the moving contact 1 and a power source, and a protection mechanism is also mounted on the mounting bracket 2.

[0064] The moving contact 1 includes at least one contact blade 11, the mounting bracket 2 includes a bracket 21 and a first rotating shaft 22, the bracket 21 includes a base 23 and a shaft seat 24 integrally formed and connected to the base 23 at the first end of the base 23, the shaft seat 24 is provided with a shaft mounting hole 25, the first rotating shaft 22 is disposed in the shaft mounting hole 25, and at least one of the contact blades 11 is rotatably disposed on the shaft seat 24 through the first rotating shaft 22;

[0065] The mounting bracket 2 also includes a first bent portion 26, a heating element 27, and a terminal block 28, which are integrally formed with the second end of the base 23 and sequentially bent and connected. Specifically, the bearing 24, base 23, first bent portion 26, heating element 27, and terminal block 28 are integrally formed. The first bent portion 26 includes a tripping mounting structure 261 for mounting a protective mechanism; the terminal block 28 includes a power mounting structure 281 for connecting to a load or power source. In this embodiment, the tripping mounting structure 261 includes a riveting hole; the power mounting structure 281 includes a connection hole, and the power mounting structure 281 connects to a conductor to access a power source or load. The integral design of the bearing 24, base 23, first bent portion 26, heating element 27, and terminal block 28 ensures the consistency of the cross-sectional area of ​​the entire mounting bracket 2, avoids temperature rise at the connection points of various components, and thus reduces the overall temperature rise of the mounting bracket 2.

[0066] Preferred, such as Figure 6 As shown, the base 23, the heating element 27, and the terminal block 28 are parallel to each other. A second bending portion is provided between the heating element 27 and the terminal block 28. The length of the heating element 27 is greater than the length of the terminal block 28, and the distance between the plane of the terminal block 28 and the plane of the base 23 is less than the distance between the plane of the heating element 27 and the plane of the base 23. This increases the length of the heating element 27. The terminal block 28, after being bent by the second bending portion, is easier to fix and connect to the conductor of the load or power supply, making assembly convenient.

[0067] Preferred, such as Figure 1 As shown, the moving contact 1 includes at least two stacked contact blades 11. A magnetic shielding element 31 and a first elastic element 32 are disposed between two adjacent contact blades 11. The magnetic shielding element 31 includes a first through hole. The first elastic element 32 is located in the first through hole and its two ends extend out of the first through hole. The two contact blades 11 clamp the first elastic element 32.

[0068] The magnetic shielding component 31 has a sheet-like structure. The first elastic component 32 includes two disc springs, each disc spring having a second through hole through which the first rotating shaft 22 passes, with both ends extending from opposite sides of the two contact blades 11. The diameter of the second through hole is greater than or equal to the diameter of the first rotating shaft 22, allowing the disc springs to be detached and installed from the first rotating shaft 22. The diameter of the first through hole is greater than or equal to the diameter of the bottom surface of the disc spring, so that after the magnetic shielding component 31 and the two disc springs are installed, the two disc springs are located within the first through hole of the magnetic shielding component 31. The magnetic shielding component 31 is made of a non-magnetic material, which can cut off the magnetic field and reduce the temperature rise caused by the eddy current effect between the contact blades 11 and the bearing seat 24, ensuring the reliable operation of the contact system. The disc springs are made of a magnetic material. The magnetic shielding component 31 prevents the two contact blades 11 from touching each other, instead connecting them through the two disc springs. Each contact blade 11 individually contacts the bearing seat 24 to limit the current, thereby further ensuring the reduction of temperature rise.

[0069] Furthermore, the diameter of the top surface of the disc spring is smaller than the diameter of the bottom surface of the disc spring. During installation, the top surfaces of the two disc springs abut against each other, and the bottom surface of the disc spring contacts the contact blade, resulting in higher stability after the contact blade is installed.

[0070] Preferred, such as Figure 2 As shown, in the first embodiment of the mounting bracket 2 and the protective mechanism, a thicker mounting bracket 2 is included, such as... Figure 3 As shown, in the second embodiment of the mounting bracket 2 and the protection mechanism, the mounting bracket 2 is formed by stacking at least two mounting bracket pieces 29. Without increasing the overall thickness of the mounting bracket 2, it is beneficial to increase the current carrying area of ​​the entire mounting bracket 2 and optimize the temperature rise performance of the circuit breaker.

[0071] Specifically, such as Figure 6 As shown, the bearing seat 24 includes a first sidewall 241 and a second sidewall 242 that are arranged opposite to each other and parallel to each other. At least one contact blade 11 is connected between the first sidewall 241 and the second sidewall 242. The shaft mounting hole 25 is provided on the first sidewall 241 and the second sidewall 242. The first sidewall 241 and the second sidewall 242 include contact blade arc-shaped mounting portions that extend out of the base 23 in a direction away from the first bend portion 26. That is, the sides of the first sidewall 241 and the second sidewall 242 are arc-shaped, which is used to increase the rotation angle of the contact blade 11 and avoid the base 23 restricting the rotation angle of the contact blade 11.

[0072] Preferred, such as Figure 1 , Figure 2 and Figure 12As shown, the protective mechanism includes a bimetallic strip 41, an armature 42, an armature frame 43, a second elastic element 44, and a magnetic yoke 45. The bimetallic strip 41 and the magnetic yoke 45 are respectively installed on both sides of the first bent portion 26. The armature frame 43 is installed between the bimetallic strip 41 and the first bent portion 26. The armature 42 is rotatably installed on the armature frame 43. The second elastic element 44 is installed between the armature 42 and the armature frame 43. The bimetallic strip 41, the armature frame 43, and the magnetic yoke 45 are riveted to the first bent portion 26 through riveting holes. The armature 42 is installed on the armature frame 43 through a second rotating shaft 46. Of course, the riveting holes can also be screw holes or other forms of connection structures, or welding can be used instead of riveting holes, as long as the bimetallic strip 41, the armature frame 43, and the magnetic yoke 45 can be fixed on the first bent portion 26. The second elastic element 44 can be a torsion spring, a spring, a compression spring, or a tension spring, etc. In this embodiment, the second elastic element 44 is a torsion spring. When the circuit is overloaded, the temperature of the conductive components rises, and the temperature is transferred to the bimetallic strip 41 through the first bending part 26. The bimetallic strip 41 bends due to the heat, triggering the circuit breaker to trip, thus completing the overload protection of the circuit. The first bending part 26 serves as a thermal element, eliminating the need for a separate thermal element. When the circuit is short-circuited, the armature 42 swings to overcome the force of the second elastic element 44, triggering the circuit breaker to trip, thus completing the overheat protection of the circuit. Figure 12 A schematic diagram of the structure after the protective mechanism and mounting bracket 2 are installed is shown.

[0073] Furthermore, such as Figure 7 As shown, the armature frame 43 has rivet holes and second contact spring mounting parts at both ends. The second contact spring mounting parts include two opposing second shaft mounting plates 431. The second shaft 46 passes through the two second shaft mounting plates 431 and is connected to the armature 42. The two opposing sides of the two second shaft mounting plates 431 are provided with two first notches 432 to facilitate the installation and fixation of the second elastic member 44. The outer side of the first notch 432 near the rivet hole is provided with a first limiting protrusion 433 for limiting and cooperating with the armature 42. The side of the first notch 432 away from the rivet hole is provided with a first limiting arm 434 that abuts against the first end of the second elastic member 44. The second end of the second elastic member 44 abuts against the armature 42.

[0074] Furthermore, such as Figure 9As shown, the armature 42 includes two relatively parallel and spaced rocker arm side plates 421, with a first force-bearing plate 422 connected between the two rocker arm side plates 421. The first force-bearing plate 422 is located at one opposite end of the two rocker arm side plates 421 and is perpendicular to the rocker arm side plates 421. The first force-bearing plate 422 is used to abut against the second end of the second elastic member 44. A second pivot mounting hole 423 is provided at the end of the two rocker arm side plates 421 away from the first force-bearing plate 422. The two second pivot mounting holes 423 of the two rocker arm side plates 421 are opposite to each other; a second limiting protrusion 424 is provided between the second pivot mounting hole 423 of the rocker arm side plate 421 and one end connected to the first force plate 422, the two second limiting protrusions 424 of the two rocker arm side plates 421 are opposite to each other, and the two second limiting protrusions 424 abut against the two first limiting protrusions 433 respectively, and the second limiting protrusions 424 can be formed by stamping on the back of the rocker arm side plate 421; Figure 11 As shown, a tripping drive rod 425 extends from the side of the first force plate 422 away from the base 23 in a direction away from the base 23, for driving the circuit breaker to trip. The length direction of the bimetallic strip 41 is perpendicular to the base 23. The projection of the bimetallic strip 41 onto the first bend 26 is located in the middle of the first bend 26. The projection of the tripping drive rod 425 onto the first bend 26 is located on one side of the first bend 26, and the tripping drive rod 425 and the bimetallic strip 41 are spaced apart. That is, the projections of the bimetallic strip 41 and the tripping drive rod 425 onto the first bend 26 are misaligned, that is, the projections of the bimetallic strip 41 and the tripping drive rod 425 onto the first bend 26 are spaced apart.

[0075] Furthermore, such as Figure 11 As shown, the two rocker arm side plates 421 extend out of the two sides of the first bend 26. That is, the projections of the two rocker arm side plates 421 onto the first bend 26 are located on both sides of the first bend 26. When the armature 42 rotates around the second pivot 46, the first bend 26 can be located between the two rocker arm side plates 421. The two ends of the magnetic yoke 45 in the length direction extend out of the two sides of the first bend 26 and are opposite to the two rocker arm side plates 421.

[0076] Furthermore, such as Figure 8 As shown, the riveting hole of the magnetic yoke 45 includes an arc-shaped concave surface 451 on the side through which the rivet is inserted, so that the outer diameter of the riveting hole is larger than the inner diameter, and the force-bearing surface of the rivet can extend into the riveting hole but not protrude out of the riveting hole, thus enhancing the aesthetics.

[0077] Preferred, such as Figure 1As shown, the contact shaft 51 is provided with a shaft drive part 52 connected to the operating mechanism. In this embodiment, the shaft drive part 52 is a first hole. The operating mechanism is hinged to the first hole through a first connecting rod (not shown) to drive the contact shaft 51 to rotate. A contact spring bracket 53 and at least one contact spring 54 are installed inside the contact shaft 51. The contact spring bracket 53 is rotatably mounted on the contact shaft 51, and at least one contact spring 54 is connected between the contact spring bracket 53 and the contact shaft 51.

[0078] Furthermore, such as Figure 1 and Figure 4 As shown, at least one of the contact blades 11 is rotatably connected to the contact shaft 51. The contact shaft 51 includes a third through hole 511. The end of the contact blade 11 that contacts the stationary contact is the contact end, and the end that connects to the shaft seat 24 is the mounting end. The shaft seat 24 extends at least partially into the third through hole 511. The mounting end is rotatably mounted in the contact shaft 51 and connected to the shaft seat 24 via a first shaft 22. The contact end extends out from the third through hole 511. The contact blade 11 has rotational space within the third through hole 511 and can rotate relative to the contact shaft 51. The clockwise or counterclockwise rotation of the contact shaft 51 drives the contact blade 11 to rotate, thereby realizing the opening and closing of the circuit breaker.

[0079] Preferred, such as Figure 5 As shown, the contact spring 54 acts on the contact blade 11 through the contact spring bracket 53. The mounting end of the contact blade 11 includes a first driving part 111 protruding to one side along the width direction of the contact blade 11. A driving rod 112 passes through the first driving part 111 along the thickness direction of the contact blade 11. Both ends of the driving rod 112 extend from both sides of the first driving part 111 and are connected to the contact spring bracket 53. The contact spring bracket 53 and the driving rod 112 are driven together.

[0080] Furthermore, such as Figure 14 As shown, in a preferred embodiment, the contact spring bracket 53 is rotatably mounted inside the contact shaft 51 via a third rotating shaft 536. The contact spring bracket 53 includes a contact spring mounting portion 531 and a contact blade driving portion located at both ends. The contact spring mounting portion 531 is rotatably mounted to the third rotating shaft 536. The contact blade driving portion includes two contact blade driving arms 533 and a contact blade clearance notch 532 located between the two contact blade driving arms 533. The thickness side of the contact blade 11 can extend into the contact blade clearance notch 532. The two contact blade driving arms 533 respectively abut against the two ends of the driving rod 112.

[0081] The contact drive arm 533 includes a bent-connected repulsion locking area 534 and a closing / opening drive area 535. The repulsion locking area 534 is located at the end away from the contact spring mounting portion 531.

[0082] Under normal conditions, the opening and closing drive zone 535 and the drive rod 112 cooperate and abut against each other, and the contact spring bracket 53 drives the moving contact 1 to rotate in the first direction through the drive rod 112 and is limited by the contact shaft 51.

[0083] During normal opening and closing operations of the circuit breaker, the operating mechanism drives the contact shaft 51 to rotate. The contact shaft 51 drives the moving contact 1 to swing and contact and separate from the stationary contact. The moving contact 1 and the contact shaft 51 do not rotate relative to each other. The moving contact 1 will only rotate slightly relative to the stationary contact to provide overtravel when it contacts the stationary contact. The drive rod 112 also cooperates with the opening and closing drive area 535. The opening and closing drive area 535 slides within the range of the opening and closing drive area 535 and does not slide beyond the equilibrium position bending point to the repulsion locking area 534. The contact spring bracket 53 does not change the direction of the force acting on the drive rod 112 and still drives the moving contact 1 to rotate in the closing direction.

[0084] When a short-circuit fault occurs in the circuit breaker, the huge short-circuit current causes a huge electro-repulsive force between the moving contact 1 and the stationary contact. This electro-repulsive force drives the moving contact 1 to separate from the stationary contact at a faster speed, causing the moving contact 1 to rotate relative to the contact shaft 51 with the first rotating shaft 22 as the rotation center. The drive rod 112 on the moving contact 1 presses against the contact spring support 53, causing the contact spring support 53 to rotate. The drive rod 112 slides from the opening and closing drive area 535 of the contact spring support 53 to the repulsion locking area 534, that is, the drive rod 112 passes the equilibrium position bending point and changes the direction of the force exerted by the contact spring support 53 on the drive rod 112. The contact spring support 53 drives the moving contact 1 to rotate in the second direction through the drive rod 112 and limit it to the contact shaft 51, so that the moving contact 1 is in a state of force balance and completes self-locking. The first direction and the second direction are opposite, namely clockwise and counterclockwise, respectively.

[0085] After the fault is cleared, press one end of the moving contact 1 to make the moving contact 1 rotate in the direction of the stationary contact. The drive rod 112 on the moving contact 1 slides from the repulsion locking area 534 of the contact spring bracket 53 to the opening and closing drive area 535. The moving contact 1 passes the force balance point. At this time, the moving contact 1 rotates in the direction of the stationary contact under the action of the contact spring 54 and is limited by the contact shaft 51.

[0086] It should be noted that the moving contact 1 has the following three states:

[0087] In the closed state, the opening and closing drive area 535 of the contact spring bracket 53 abuts against the drive rod 112 under the action of the contact spring 54;

[0088] During the repulsion process, the drive rod 112 slides from the opening and closing drive area 535 of the contact spring support 53 to the repulsion locking area 534 of the contact spring support 53.

[0089] In the repulsion state, the drive rod 112 is located in the repulsion locking area 534 of the contact spring support 53. Under the action of the contact spring 54, the moving contact 1 is in force balance and the moving contact 1 is in a relatively stationary state relative to the contact rotation shaft 51.

[0090] When the circuit breaker is closed, the contact spring 54 also increases the contact pressure between the contact blade 11 and the stationary contact, improving the stability of the electrical connection between the moving contact 1 and the stationary contact.

[0091] Furthermore, such as Figure 13 and Figure 15 As shown, in another preferred embodiment, the contact spring support 53 is mounted on the contact blade 11. The contact spring support 53 includes at least one pressure plate 537, which is connected to the first driving part 111 of the contact blade 11. The pressure plate 537 includes a first pressure plate wall 5371, a second pressure plate wall 5372, and a contact spring connecting wall 5373, which are sequentially bent and connected. The first pressure plate wall 5371 and the second pressure plate wall 5372 are arranged parallel to each other and spaced apart. A "U"-shaped groove is formed between the first pressure plate wall 5371 and the second pressure plate wall 5372. The second pressure plate wall 5372 and the contact spring connecting wall 5373 are vertically connected. The first driving part 111 extends into the U-shaped slot on its thick side. The driving rod 112 passes through the first pressure plate wall 5371, the second pressure plate wall 5372, and the first driving part 111. Both ends extend from opposite sides of the first pressure plate wall 5371 and the second pressure plate wall 5372. The upper and lower sides of the contact spring connecting wall 5373 bend towards the contact spring 54 to form a limiting wall 5374, preventing the contact spring 54 from coming off the contact spring connecting wall 5373 during the rotation of the contact blade 11. By setting the pressure plate 537, the pressure plate 537 is directly installed on the contact blade 11, and can be installed together with the contact blade 11 during assembly, making assembly simpler.

[0092] Furthermore, such as Figure 15 As shown, in this embodiment, the moving contact 1 includes two contact blades 11 and two pressure plates 537 disposed on the two contact blades 11. The two pressure plates 537 have symmetrical structures to accommodate the stacked structure of the two contact blades 11. When more contact blades 11 are stacked, the pressure plates 537 may only include a "U" shaped structure. Only the pressure plates 537 on both sides of the multiple contact blades 11 include contact spring connecting walls 5373 for connecting with contact springs 54.

[0093] Preferred, such as Figure 4 , Figure 13 and Figure 14As shown, the side of the contact spring mounting part 531 or the contact spring connecting wall 5373 facing the contact shaft 51 includes at least one mounting protrusion. The contact shaft 51 includes at least one contact spring mounting groove 512. One end of the contact spring 54 is sleeved on the mounting protrusion, and the other end is located in the contact spring mounting groove 512.

[0094] Preferred, such as Figure 4 As shown, the contact shaft 51 includes a first mounting sidewall and a second mounting sidewall that are relatively parallel and spaced apart, as well as a first top wall, a first bottom wall, and a first mounting rear wall connected to the first mounting sidewall and the second mounting sidewall. The first bottom wall and the first mounting rear wall are connected in an arc shape. The first top wall and the first mounting rear wall are spaced apart to form the inlet or outlet of the third through hole 511, from which the contact blade 11 extends. The first top wall, the first bottom wall, the first mounting sidewall, and the second mounting sidewall are connected to form the outlet or inlet of the third through hole 511, from which the shaft seat 24 of the conductive component extends.

[0095] Furthermore, such as Figure 4 As shown, the opening of the contact shaft 51 facing the shaft seat 24 is provided with a clearance slope 513. The two clearance slopes 513 are respectively provided on the first mounting side wall and the second mounting side wall, and the distance between the two clearance slopes 513 from the opening of the shaft seat 24 to the inside of the shaft seat 24 gradually decreases, so as to facilitate the shaft seat 24 to be installed into the contact shaft 51.

[0096] Furthermore, such as Figure 1 As shown, both ends of the first rotating shaft 22 and the third rotating shaft 536 are mounted on the first mounting sidewall and the second mounting sidewall; the first mounting sidewall and the second mounting sidewall of the contact rotating shaft 51 include opposing strip grooves or strip holes 514, and both ends of the third rotating shaft 536 slide in the strip grooves or strip holes 514 to facilitate the assembly of the third rotating shaft 536.

[0097] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0098] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A conductive component, comprising: The moving contact (1) and the mounting bracket (2) are provided. The moving contact (1) includes at least one contact blade (11). The mounting bracket (2) includes a support (21) and a first rotating shaft (22). The support (21) includes a base (23) and a shaft seat (24) integrally formed at the first end of the base (23). The shaft seat (24) is provided with a shaft mounting hole (25). The first rotating shaft (22) is disposed in the shaft mounting hole (25). At least one contact blade (11) is rotatably disposed on the shaft seat (24) through the first rotating shaft (22). The mounting bracket (2) is characterized in that it further includes a first bent portion (26), a heating element (27), and a terminal block (28) integrally formed with the second end of the base (23) and sequentially bent and connected. The first bent portion (26) includes a tripping mounting structure (261), and the protection mechanism is mounted on the first bent portion (26) through the tripping mounting structure (261). The protection mechanism includes a bimetallic strip (41), an armature (42), an armature frame (43), and a second elastic element. The bimetallic strip (41) and the magnetic yoke (45) are respectively installed on both sides of the first bend (26), the armature frame (43) is installed between the bimetallic strip (41) and the first bend (26), the armature (42) is rotatably installed on the armature frame (43), and the second elastic element (44) is installed between the armature (42) and the armature frame (43); the terminal block (28) includes a power supply mounting structure (281) for connecting to a load or power source.

2. The conductive component according to claim 1, characterized in that, The base (23), the heating element (27) and the terminal block (28) are parallel to each other. A second bend is provided between the heating element (27) and the terminal block (28). The length of the heating element (27) is greater than the length of the terminal block (28), and the distance between the plane of the terminal block (28) and the plane of the base (23) is less than the distance between the plane of the heating element (27) and the plane of the base (23).

3. The conductive component according to claim 1, characterized in that, The moving contact (1) includes at least two stacked contact blades (11), and a magnetic shielding element (31) and a first elastic element (32) are provided between two adjacent contact blades (11). The magnetic shielding element (31) includes a first through hole, and the first elastic element (32) is located in the first through hole and its two ends extend out of the first through hole. The two contact blades (11) clamp the first elastic element (32).

4. The conductive component according to claim 3, characterized in that, The magnetic shielding component (31) has a sheet-like structure. The first elastic component (32) includes two disc springs. The disc springs include a second through hole. The first rotating shaft (22) passes through the second through hole and extends from the opposite sides of the two contact blades (11).

5. The conductive component according to claim 1, characterized in that, The mounting bracket (2) is composed of at least two mounting bracket pieces (29) stacked together.

6. The conductive component according to claim 1, characterized in that, The bearing seat (24) includes a first sidewall (241) and a second sidewall (242) that are arranged opposite to each other and parallel to each other. At least one contact blade (11) is connected between the first sidewall (241) and the second sidewall (242). The shaft mounting hole (25) is provided on the first sidewall (241) and the second sidewall (242). The first sidewall (241) and the second sidewall (242) include contact blade arc-shaped mounting portions that extend out of the base (23) in a direction away from the first bend (26).

7. The conductive component according to claim 1, characterized in that, The armature frame (43) has rivet holes and second contact spring mounting parts at both ends. The second contact spring mounting parts include two opposing second rotating shaft mounting plates (431). The second rotating shaft (46) passes through the two second rotating shaft mounting plates (431) and is connected to the armature (42). The two opposing sides of the two second rotating shaft mounting plates (431) are provided with two first notches (432). The outer side of the first notch (432) near the rivet hole is provided with a first limiting protrusion (433) for limiting and cooperating with the armature (42). The side of the first notch (432) away from the rivet hole is provided with a first limiting arm (434) that abuts against the first end of the second elastic member (44). The second end of the second elastic member (44) abuts against the armature (42).

8. The conductive component according to claim 7, characterized in that, The armature (42) includes two relatively parallel and spaced rocker arm side plates (421), and a first force plate (422) is connected between the two rocker arm side plates (421). The first force plate (422) is located at one end opposite to the two rocker arm side plates (421), and the first force plate (422) is perpendicular to the rocker arm side plates (421). The first force plate (422) abuts against the second end of the second elastic member (44). A second pivot mounting hole (423) is opened at one end of the two rocker arm side plates (421) away from the first force plate (422), and the two second pivot mounting holes (423) of the two rocker arm side plates (421) are opposite to each other. A second limiting protrusion (424) is provided between the second pivot mounting hole (423) of the rocker arm side plate (421) and one end connected to the first force plate (422). The two second limiting protrusions (424) of the two rocker arm side plates (421) are opposite to each other, and the two second limiting protrusions (424) and the two first limiting protrusions (433) respectively abut against each other. A tripping drive rod (425) extends from the side of the first force plate (422) away from the base (23) in a direction away from the base (23). The length direction of the bimetallic strip (41) is perpendicular to the base (23). The projections of the bimetallic strip (41) and the tripping drive rod (425) toward the first bend (26) are misaligned.

9. A circuit breaker, characterized in that, The device includes a handle mechanism, an operating mechanism, a stationary contact, a conductive component as described in at least any one of claims 1-8, and a contact shaft (51). The moving contact (1) of the conductive component is connected to the contact shaft (51), and at least one contact spring (54) is provided between the moving contact (1) and the contact shaft (51). The operating mechanism is connected to the contact shaft (51), and the handle mechanism is connected to the operating mechanism. The handle mechanism drives the operating mechanism to rotate the contact shaft (51), thereby causing the moving contact (1) to rotate and close or open with the stationary contact.

10. The circuit breaker according to claim 9, characterized in that, At least one contact spring (54) is provided with a contact spring bracket (53) between it and the moving contact (1). The contact shaft (51) includes a third through hole (511). The end of the contact blade (11) used to contact the stationary contact is the contact end, and the end used to connect with the shaft seat (24) is the mounting end. The shaft seat (24) extends at least partially into the third through hole (511). The mounting end is rotatably mounted in the contact shaft (51) and connected to the shaft seat (24) via a first shaft (22). The contact end extends out from the third through hole (511). The drive rod (112) passes through the mounting end along the thickness direction of the contact blade (11), and both ends extend out from both sides of the mounting end and are connected to the contact spring bracket (53).

11. The circuit breaker according to claim 10, characterized in that, The contact spring bracket (53) includes a contact spring mounting part (531) and a contact blade driving part located at both ends. The contact spring mounting part (531) is rotatably mounted in the contact shaft (51) via a third rotating shaft (536). The contact blade driving part includes two contact blade driving arms (533) and a contact blade clearance notch (532) located between the two contact blade driving arms (533). The contact blade (11) can extend into the contact blade clearance notch (532). The two contact blade driving arms (533) abut against the two ends of the driving rod (112) respectively. The contact drive arm (533) includes a bent-connected repulsion locking area (534) and a closing / opening drive area (535), wherein the repulsion locking area (534) is located at the end away from the contact spring mounting portion (531). When the opening and closing drive area (535) abuts against the drive rod (112), the contact spring bracket (53) drives the moving contact (1) to rotate in the first direction and limit it with the contact shaft (51) through the drive rod (112). The operating mechanism drives the contact shaft (51) to rotate, and the contact shaft (51) drives the moving contact (1) to swing and contact and separate from the stationary contact. When the repulsion locking area (534) abuts against the drive rod (112), the contact spring bracket (53) drives the moving contact (1) to rotate in the second direction and limit it with the contact shaft (51) through the drive rod (112), so that the moving contact (1) is in a state of force balance and completes self-locking; wherein, the first direction and the second direction are opposite.

12. The circuit breaker according to claim 10, characterized in that, The contact spring bracket (53) includes at least one pressure plate (537). The pressure plate (537) includes a first pressure plate wall (5371), a second pressure plate wall (5372), and a contact spring connecting wall (5373) that are bent and connected in sequence. The first pressure plate wall (5371) and the second pressure plate wall (5372) are arranged parallel to each other and spaced apart. A "U"-shaped groove is formed between the first pressure plate wall (5371) and the second pressure plate wall (5372). The second pressure plate wall (5372) and the contact spring connecting wall (5373) are vertically connected and perpendicular to the top surface of the "U"-shaped groove. The mounting end of the contact blade (11) includes a first driving part (111) protruding to one side along the width direction of the contact blade (11). The thickness side of the first driving part (111) extends into the "U"-shaped slot. The driving rod (112) passes through the first pressure plate wall (5371), the second pressure plate wall (5372) and the first driving part (111) at the same time. Both ends extend from the opposite sides of the first pressure plate wall (5371) and the second pressure plate wall (5372). The upper and lower sides of the contact spring connecting wall (5373) bend towards the contact spring (54) to form a limiting wall (5374).

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