Circuit breaker
By providing elastic parts on both sides of the support member of the circuit breaker, the solid-state switching unit and the insulating member are closely in contact, the problem of the solid-state switching unit and the heat sink is solved, and the thermal conductivity and reliability of the circuit breaker are improved.
Patent Information
- Application Number
- CN202422229549.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-11
AI Technical Summary
In a circuit breaker, the contact between the solid-state switching unit and the heat sink will decrease when the support is deformed, resulting in a decrease in thermal conductivity.
A circuit breaker is designed, wherein the support member is provided with elastic parts on both sides, which abut against the solid-state switching unit and apply pressure to it to make it in close contact with the insulating member and the heat dissipation assembly.
When the edge position of the support member is deformed, the elastic part can still maintain close contact between the solid-state switching unit and the insulator, improve the heat conduction efficiency and enhance the stability and reliability of the circuit breaker.
Smart Images
Figure CN223023176U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure generally relate to the field of electrical equipment, and more particularly to a circuit breaker. Background Art
[0002] When a solid-state switch unit is integrated into a circuit breaker, the solid-state switch unit can provide a faster response speed and higher reliability. A large amount of heat is generated when the solid-state switch unit is operating, and this heat may affect the performance of the product. In a conventional circuit breaker switch, the solid-state switch unit can be fixed to a heat dissipation component through a support member, so that the heat of the solid-state switch unit is transferred to the heat dissipation member. However, when the support member is deformed, the solid-state switch units at the edge positions cannot maintain good contact with the heat dissipation member, resulting in a problem of reduced thermal conductivity. Summary of the Utility Model
[0003] The purpose of the embodiments of the present disclosure is to provide a circuit breaker to at least partially solve the above problems and other potential problems.
[0004] The present disclosure provides a circuit breaker. The circuit breaker includes: a plurality of solid-state switch units; an insulating member abutting against the plurality of solid-state switch units; a heat dissipation assembly abutting against the insulating member on a side of the insulating member away from the plurality of solid-state switch units; and a support member disposed on a side of the plurality of solid-state switch units away from the heat dissipation assembly and coupled to the heat dissipation assembly. Elastic portions are provided on opposite sides of the support member, and the elastic portions on both sides respectively abut against the corresponding solid-state switch units. The elastic portions are configured to apply a force to the corresponding solid-state switch units to cause the solid-state switch units to abut against the insulating member.
[0005] In some embodiments, each solid-state switch unit includes two conductive busbars and a circuit board. The two conductive busbars are spaced apart from each other, and the circuit board is electrically connected to the two conductive busbars on a side of the two conductive busbars facing the support member. Two elastic portions are respectively provided on opposite sides of the support member, and the two elastic portions respectively abut against the two conductive busbars on the corresponding side.
[0006] In some embodiments, along the arrangement direction of the circuit board, the edges of the two conductive busbars extend outside the edge of the circuit board, and the two elastic portions abut against a side of the two conductive busbars facing the support member outside the edge of the circuit board.
[0007] In some embodiments, a plurality of pairs of ribs are provided on a side of the support member facing the circuit boards of the plurality of solid-state switch units, and a receiving groove is formed between each pair of ribs. The circuit boards of the plurality of solid-state switch units are respectively disposed in the receiving grooves of the plurality of pairs of ribs, and the plurality of pairs of ribs respectively support the two conductive busbars on both sides of the edge of the corresponding circuit board.
[0008] In some embodiments, a protrusion is provided on a side of the convex rib facing the two conductive busbars, and the protrusion abuts against the two conductive busbars.
[0009] In some embodiments, grooves are provided on the convex ribs on both sides of the support member, and the elastic portions are arranged in the grooves.
[0010] In some embodiments, the elastic portion is integrally formed with the convex rib.
[0011] In some embodiments, the elastic portion includes two elastic arms, and there is an included angle between the two elastic arms.
[0012] In some embodiments, the support member is coupled to the heat dissipation component at a position between two adjacent solid-state switch units.
[0013] In some embodiments, the heat dissipation component includes: a heat conducting member disposed on a side of the insulating member away from the plurality of solid-state switch units; and a heat dissipating member coupled to the insulating member and the support member on a side of the heat conducting member away from the insulating member.
[0014] In some embodiments, the circuit breaker further includes: a leakage switch unit including a plurality of terminals, and the plurality of terminals are respectively electrically connected to the plurality of solid-state switch units.
[0015] In the embodiments of the present disclosure, the circuit breaker includes an insulating member, a heat dissipation component, a support member, and a plurality of solid-state switch units. The insulating member abuts against the plurality of solid-state switch units. The heat dissipation component abuts against the insulating member on a side of the insulating member away from the plurality of solid-state switch units. The support member is coupled to the heat dissipation component on a side of the plurality of solid-state switch units away from the heat dissipation component. Elastic portions are provided on opposite sides of the support member, and the elastic portions on both sides respectively abut against the corresponding side of the solid-state switch unit. The elastic portion is configured to apply a force to the corresponding solid-state switch unit to make the solid-state switch unit abut against the insulating member. With this arrangement, the support member can make the plurality of solid-state switch units be in close contact with the insulating member and the heat dissipation component. When deformation occurs at the edge position of the support member, the elastic portion can still make the solid-state switch units on both sides be in close contact with the insulating member, so that the heat of the solid-state switch unit is efficiently conducted to the insulating member and the heat dissipation component, which helps to improve the stability and reliability of the circuit breaker.
[0016] It should be understood that the content described in this part is not intended to define the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. Description of the Drawings
[0017] Combined with the drawings and referring to the following detailed description, the above and other features, advantages, and aspects of the embodiments of the present disclosure will become more obvious. In the drawings, the same or similar reference numerals denote the same or similar elements, where:
[0018] Figure 1 Shows a perspective view of a circuit breaker according to an embodiment of the present disclosure;
[0019] Figure 2 Shows a perspective view of a circuit breaker according to an embodiment of the present disclosure, in which an elastic part is shown;
[0020] Figure 3 Shows a perspective view of a solid-state switch unit and a support according to an embodiment of the present disclosure, in which the elastic part is shown abutting against a conductive busbar;
[0021] Figure 4 Shows an exploded view of a solid-state switch unit and a support according to an embodiment of the present disclosure; and
[0022] Figure 5 Shows a perspective view of a circuit breaker according to an embodiment of the present disclosure, in which a housing is shown.
[0023] Description of reference numerals:
[0024] 100, circuit breaker;
[0025] 10, solid-state switch unit; 11, conductive busbar; 12, circuit board;
[0026] 20, heat dissipation assembly; 21, heat conducting member; 22, heat dissipating member;
[0027] 30, insulating member;
[0028] 40, support; 41, elastic part; 411, elastic arm; 42, rib; 43, receiving groove; 44, protrusion; 45, groove;
[0029] 50, leakage switch unit; 51, terminal;
[0030] 60, housing. Detailed description of the specific embodiments
[0031] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.
[0032] As used herein, the term "comprising" and its variations denote open-ended inclusion, i.e., "including but not limited to". Unless otherwise specified, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.
[0033] As described above, in a conventional circuit breaker switch, the solid-state switch unit can be fixed to the heat dissipation component by a support member, so that the heat of the solid-state switch unit is transferred to the heat dissipation member. However, when the support member is deformed, the solid-state switch units at the edge positions cannot maintain good contact with the heat sink, resulting in a problem of reduced heat conduction performance.
[0034] Embodiments of the present disclosure provide a circuit breaker. In this circuit breaker, elastic portions are provided on opposite sides of the support member, and the elastic portions on both sides respectively abut against the corresponding solid-state switch units on their respective sides. The elastic portions are configured to apply a force to the corresponding solid-state switch units to cause the solid-state switch units to abut against the insulating member. With this arrangement, when the support member deforms at its edge positions, the elastic portions can still cause the solid-state switch units on both sides to be in close contact with the insulating member, so that the heat of the solid-state switch units is efficiently conducted to the insulating member and the heat dissipation component, which helps to improve the stability and reliability of the circuit breaker. The principle of the present disclosure will be described in detail below in conjunction with Figures 1 to 5 to describe the principle of the present disclosure in detail.
[0035] As Figures 1 to 3 shown, the circuit breaker 100 includes an insulating member 30, a heat dissipation component 20, a support member 40, and a plurality of solid-state switch units 10. The solid-state switch units 10 can control the on / off of current based on the characteristics of semiconductor devices.
[0036] In some embodiments, the solid-state switch unit 10 may include a metal oxide semiconductor field effect transistor (MOSFET), such as an N-type MOSFET or a P-type MOSFET. For example, when the gate (control terminal) voltage of the N-type MOSFET reaches the threshold, the N-type MOSFET conducts, allowing current to flow from the source to the drain. When the gate voltage is lower than the threshold, the N-type MOSFET turns off, blocking the current flow. The case where the solid-state switch unit 10 includes a P-type MOSFET will not be described herein again.
[0037] It should be understood that the solid-state switch unit 10 may include other types of switching devices, and the embodiments of the present disclosure are not limited thereto.
[0038] The solid-state switch unit 10 can quickly respond to control signals under high voltage and high current conditions to achieve rapid cutting off or connection of current. In addition, compared with traditional electromechanical relays or contactors, since the solid-state switch unit 10 has no physical contact points, it will not generate electric arcs or wear, thus reducing energy loss and maintenance requirements. Moreover, the solid-state switch unit 10 can be built with an overload protection function, which can automatically turn off when overcurrent is detected to protect the circuit from damage.
[0039] As Figure 1 and Figure 2 shown, the insulating member 30 abuts against a plurality of solid-state switch units 10. By arranging insulating materials at the plurality of solid-state switch units 10, a safety barrier can be formed for the plurality of solid-state switch units 10, thereby preventing the occurrence of electrical short circuits. In addition, in some usage scenarios, the insulating member 30 also helps to reduce electromagnetic interference and can improve the stability of the circuit breaker 100.
[0040] As an example, as Figure 1 and Figure 2 shown, the number of insulating members 30 can be multiple. The multiple insulating members 30 respectively abut against the multiple solid-state switch units 10, and each insulating member 30 is only responsible for the electrical isolation of the corresponding one solid-state switch unit 10.
[0041] As another example, as Figure 1 and Figure 2 shown, the insulating member 30 is a semi-surrounding structure made of insulating material. The insulating member 30 can not only electrically isolate the bottom surface of the solid-state switch unit 10, but also electrically isolate the left and right sides of the solid-state switch unit 10, thereby avoiding interference between adjacent solid-state switch units 10.
[0042] As yet another example, the insulating member 30 can be an integral structure. In this case, the insulating member 30 is located on one side of the multiple solid-state switch units 10, and one insulating member 30 is responsible for the electrical isolation of the multiple solid-state switch units 10.
[0043] As Figures 1 to 3 shown, the heat dissipation component 20 abuts against the insulating member 30 on the side of the insulating member 30 away from the multiple solid-state switch units 10. The solid-state switch unit 10 generates heat during operation. If the heat is not dissipated in time, it may lead to too high a temperature, which may in turn affect its working performance or even cause damage.
[0044] The heat dissipation component 20 is arranged on the side of the insulating member 30 away from the solid-state switch unit 10, and the surface area of the heat dissipation component 20 can be utilized to promote the effective conduction and diffusion of heat. It should be understood that the insulating member 30 is arranged between the heat dissipation component 20 and the multiple solid-state switch units 10. The insulating member 30 can not only achieve electrical isolation, but also has good heat conduction performance.
[0045] As Figure 2 and Figure 3 shown, the support member 40 is disposed on a side of the plurality of solid-state switch units 10 away from the heat dissipation component 20 and is coupled to the heat dissipation component 20. The support member 40 and the heat dissipation component 20 can form a stable support frame, and the support frame can fix the plurality of solid-state switch units 10. When facing external impacts or vibrations, the stability of the support frame is good, and the plurality of solid-state switch units 10 can be in close contact with the insulating member 30 and the heat dissipation component 20.
[0046] As Figure 2 and Figure 3 shown, elastic portions 41 are provided on opposite sides of the support member 40. The elastic portions 41 on both sides respectively abut against the corresponding solid-state switch units 10 on their respective sides. The elastic portions 41 can apply pressure to the solid-state switch units 10, so that the solid-state switch units 10 can tightly abut against the insulating member 30. With this arrangement, the support member 40 can bring the plurality of solid-state switch units 10 into close contact with the insulating member 30. When the edge position of the support member 40 is deformed, the elastic portions 41 can still keep the solid-state switch units 10 on both sides in close contact with the insulating member 30, so that the heat of the solid-state switch units 10 can be efficiently conducted to the insulating member 30 and the heat dissipation component 20, which helps to improve the stability and reliability of the circuit breaker 100.
[0047] In some embodiments, as Figure 3 shown, each solid-state switch unit 10 includes two conductive busbars 11 and a circuit board 12. The two conductive busbars 11 are spaced apart from each other. The circuit board 12 is located on a side of the two conductive busbars 11 facing the support member 40, and the circuit board 12 is electrically connected to the two conductive busbars 11. Various electronic components for controlling the operation of the solid-state switch unit 10, such as metal-oxide-semiconductor field-effect transistors or other types of transistors, are integrated on the circuit board 12, and these components are responsible for receiving control signals and switching the on / off of the current accordingly.
[0048] On opposite sides of the support member 40, two elastic portions 41 are respectively provided. The two elastic portions 41 on each side are in contact with the two conductive busbars 11 on the same side. With this arrangement, the two elastic portions 41 can apply a preset pressure to the two conductive busbars 11 on the same side, thereby ensuring good contact between the conductive busbars 11 and the insulating member 30, which helps to improve the heat conduction performance between the solid-state switch unit 10, the insulating member 30, and the heat dissipation component 20.
[0049] In some embodiments, as Figure 2 and Figure 3As shown, along the arrangement direction of the circuit board 12, the edges of the two conductive busbars 11 extend beyond the edge of the circuit board 12. Here, the width of the conductive busbar 11 is greater than the width of the circuit board 12. A part of the side surface of the conductive busbar 11 facing the support 40 is blocked by the circuit board 12, and the other part extends outside the edge of the circuit board 12, thereby forming a stepped structure on both sides of the circuit board 12.
[0050] At the position outside the edge of the circuit board 12, the two elastic parts 41 abut against one side of the two conductive busbars 11 facing the support 40. The elastic parts 41 can apply a continuous pressure to the conductive busbars 11, so that the conductive busbars 11 are in close contact with the insulating part 30 and the heat dissipation component 20. With this arrangement, the elastic parts 41 can be in direct contact with the conductive busbars 11, and the elastic force of the elastic parts 41 can be stably transmitted to the conductive busbars 11.
[0051] In some other embodiments, the elastic parts 41 and the conductive busbars 11 can be connected by a snap structure. For example, a card slot is provided on the elastic part 41, and a hook is provided on the conductive busbar 11. The hook and the card slot cooperate to connect the elastic part 41 and the conductive busbar 11, so as to transmit the elastic force of the elastic part 41 to the conductive busbar 11.
[0052] In some embodiments, as Figure 4 shown, multiple pairs of ribs 42 are provided on the side of the support 40 facing the circuit board 12 of the multiple solid-state switch units 10. There is a certain space between each pair of ribs 42, thus forming a receiving groove 43. The size of the receiving groove 43 is adapted to the circuit board 12 of the multiple solid-state switch units 10, and the circuit board 12 of each solid-state switch unit 10 can be embedded into the corresponding receiving groove 43. With this arrangement, the ribs 42 can protect the circuit board 12, so as to avoid damaging the circuit board 12 and the electronic components on the circuit board 12 during installation by workers or accidental dropping. In addition, each pair of ribs 42 also supports the two conductive busbars 11 on both sides of the edge of the circuit board 12. Each pair of ribs 42 can apply a supporting force to the conductive busbars 11, so that the conductive busbars 11 are in close contact with the insulating part 30 and the heat dissipation component 20.
[0053] In some embodiments, as Figure 4 shown, a protrusion 44 is provided on the side of the rib 42 facing the two conductive busbars 11. The protrusion 44 is in close contact with the conductive busbar 11, so as to support and position the conductive busbar 11.
[0054] As an example, as Figure 4 shown, four protrusions 44 are provided on the ribs 42 on both sides of the support 40. The two adjacent protrusions 44 are spaced apart from each other and can support one conductive busbar 11. The four protrusions 44 can support and position the two conductive busbars 11 of the solid-state switch unit 10.
[0055] In some embodiments, as Figure 3 and Figure 4 shown, grooves 45 are provided on the convex ribs 42 on both sides of the support member 40, and the elastic portion 41 is disposed in the grooves 45. With this arrangement, the grooves 45 on the convex ribs 42 can reserve space for the arrangement of the elastic portion 41. When the elastic portion 41 is disposed in the grooves 45, along the arrangement direction of the circuit board 12, the elastic portion 41 and the convex ribs 42 partially overlap. Both the elastic portion 41 and the convex ribs 42 can support the conductive bus bar 11 outside the edge of the circuit board 12, without increasing the width of the conductive bus bar 11, which helps to save the material cost of the conductive bus bar 11 and the volume inside the circuit breaker 100.
[0056] In some embodiments, as Figure 3 and Figure 4 shown, the elastic portion 41 and the convex ribs 42 are integrally formed of the same material, which not only simplifies the manufacturing process but also effectively reduces the production cost. During the manufacturing process, there is a seamless connection between the elastic portion 41 and the convex ribs 42, which can enhance the integrity and durability of the structure. With this arrangement, additional assembly steps can be avoided, manufacturing errors are reduced, and thus the reliability of the support member 40 is improved.
[0057] When the support member 40 is tightly combined with the heat dissipation component 20, the elastic portion 41 will be compressed to generate elastic deformation. The elastic deformation will exert a pressure on the conductive bus bar 11, which can make the conductive bus bar 11 in close contact with the insulating member 30, thereby improving the thermal conductivity.
[0058] As another example, as Figure 3 and Figure 4 shown, the elastic portion 41 includes two elastic arms 411, and there is an included angle between the two elastic arms 411. With this arrangement, the two elastic arms 411 together form a bifurcated Y-shaped structure. When the elastic portion 41 is subjected to an external force, the bifurcated structure can better disperse the stress, and thus provide a stable pressure through the cooperative action of the two elastic arms 411.
[0059] As yet another example, the elastic portion 41 and the convex ribs 42 can also be separated. For example, the elastic portion 41 can be a spring. Card slots are provided on both sides of the support member 40. One end of the spring is inserted into the card slot and fixed, and the other end of the spring abuts against the conductive bus bar 11, thereby applying a force to the conductive bus bar 11 to make the conductive bus bar 11 abut against the insulating member 30. In use, the number of springs can be set as needed, such as two or four, etc., to keep the two conductive bus bars 11 in balanced force.
[0060] In some embodiments, as Figure 3 and Figure 4As shown, the support member 40 is coupled to the heat dissipation assembly 20 at a position between two adjacent solid-state switch units 10.
[0061] As Figure 3 and Figure 4 shown, a plurality of screw holes are provided at positions of the support member 40 corresponding to the positions between two adjacent solid-state switch units 10, and a plurality of screw holes are also provided on the heat dissipation assembly 20. A plurality of bolts are respectively connected to the plurality of screw holes of the support member 40 and the plurality of screw holes of the heat dissipation assembly 20, so as to fix the support member 40 and the heat dissipation assembly 20 together. The screw holes on the support member 40 are arranged relatively uniformly, so the pulling forces received by different positions of the support member 40 from the bolts are also relatively uniform. By using this arrangement, a plurality of solid-state switch units 10 can be stably fixed on the heat dissipation assembly 20, and a plurality of solid-state switch units 10 can maintain good contact with the insulating member 30.
[0062] In some embodiments, as Figure 1 shown, the heat dissipation assembly 20 includes a heat conducting member 21 and a heat dissipating member 22. The heat conducting member 21 is disposed on a side of the insulating member 30 away from the plurality of solid-state switch units 10. The heat dissipating member 22 is coupled to the insulating member 30 and the support member 40 on a side of the heat conducting member 21 away from the insulating member 30.
[0063] The heat conducting member 21 can enable heat to conduct out from the solid-state switch units 10 and be transferred to the heat dissipating member 22 through the heat conducting member 21 for final heat dissipation. The heat conducting member 21 can be a plate made of metal, such as a copper plate or an aluminum plate, and these two materials are widely used because of their excellent heat conducting properties. The copper plate has a high thermal conductivity, while the aluminum plate is known for its light weight and good processability.
[0064] The heat dissipating member 22 is located on a side of the heat conducting member 21 away from the insulating member 30 and is coupled to the insulating member 30 and the support member 40, and a complete heat conduction path can be formed. In some embodiments, the heat dissipating member 22 includes a metal block and a fin group. The metal block and the fin group are connected by a heat pipe to enhance its heat dissipation effect. The metal block is usually made of a metal material with good heat conducting properties, such as copper or aluminum, and it can serve as the core component for heat collection and quickly absorb the heat from the heat conducting member 21. The fin group is composed of a series of parallel thin sheets, and these thin sheets increase the heat dissipation area, thereby improving the effect of air convection and enabling the heat to be dissipated to the surrounding environment more quickly. As an efficient heat transfer element, the heat pipe is connected between the metal block and the fin group, and the liquid inside it evaporates at the heat absorption end and condenses at the heat release end. Through this cycle process, the heat is quickly transferred from the hot end to the cold end, greatly improving the heat dissipation efficiency.
[0065] In some embodiments, as Figure 1 and Figure 2As shown, the circuit breaker 100 also integrates a leakage switch unit 50. The leakage switch unit 50 can improve the safety of the system and prevent accidents caused by electric leakage. The leakage switch unit 50 includes a plurality of terminals 51, and these terminals 51 are respectively electrically connected to a plurality of solid-state switch units 10, so as to realize the monitoring and protection of the entire circuit. In this way, the leakage switch unit 50 can monitor the current change in the circuit in real time. Once abnormal current leakage is detected, the power supply will be immediately cut off to prevent dangerous situations that may be caused by electric leakage.
[0066] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A circuit breaker (100), characterized in that: include: A plurality of solid-state switch units (10); an insulating member (30) abutting against the plurality of solid-state switch units (10); a heat dissipation component (20) abutting against the insulating member (30) at a side of the insulating member (30) away from the plurality of solid-state switch units (10); and A support member (40) is arranged on a side of the plurality of solid-state switch units (10) away from the heat dissipation assembly (20) and is coupled to the heat dissipation assembly (20); elastic portions (41) are arranged on opposite sides of the support member (40); and the elastic portions (41) on the two sides respectively abut against the solid-state switch units (10) on corresponding sides; and the elastic portions (41) are configured to apply a force to the corresponding solid-state switch unit (10) so as to cause the solid-state switch unit (10) to abut against the insulating member (30).
2. The circuit breaker (100) according to claim 1, characterized in that: Each of the solid-state switch units (10) comprises two conductive busbars (11) and a circuit board (12); the two conductive busbars (11) are spaced apart from each other; the circuit board (12) is electrically connected to the two conductive busbars (11) on a side of the two conductive busbars (11) facing the support member (40); two elastic portions (41) are respectively provided on opposite sides of the support member (40); the two elastic portions (41) respectively abut against the two conductive busbars (11) on corresponding sides.
3. The circuit breaker (100) according to claim 2, characterized in that: Along the arrangement direction of the circuit board (12), the edges of the two conductive busbars (11) extend to the outside of the edge of the circuit board (12), and the two elastic portions (41) abut against a side of the two conductive busbars (11) facing the support member (40) on the outside of the edge of the circuit board (12).
4. The circuit breaker (100) according to claim 3, characterized in that: A plurality of pairs of convex ribs (42) are arranged on one side of the support member (40) facing the circuit board (12) of the plurality of solid-state switch units (10), and a receiving groove (43) is formed between each pair of convex ribs (42); the circuit boards (12) of the plurality of solid-state switch units (10) are respectively arranged in the receiving grooves (43) of the plurality of pairs of convex ribs (42); and the plurality of pairs of convex ribs (42) respectively support the two conductive busbars (11) on both sides of the edge of the corresponding circuit board (12).
5. The circuit breaker (100) according to claim 4, characterized in that: A protrusion (44) is provided on one side of the convex rib (42) facing the two conductive busbars (11), and the protrusion (44) abuts against the two conductive busbars (11).
6. The circuit breaker (100) according to claim 4, characterized in that: The convex ribs (42) on both sides of the support member (40) are provided with grooves (45), and the elastic portion (41) is arranged in the grooves (45).
7. The circuit breaker (100) according to claim 6, characterized in that: The elastic portion (41) and the convex rib (42) are integrally formed.
8. The circuit breaker (100) according to claim 6 or 7, characterized in that: The elastic portion (41) comprises two elastic arms (411), and an angle is formed between the two elastic arms (411).
9. The circuit breaker (100) according to any one of claims 1 to 7, characterized in that: The support member (40) is coupled to the heat dissipation assembly (20) at a position between two adjacent solid-state switch units (10).
10. The circuit breaker (100) according to any one of claims 1 to 7, characterized in that: The heat dissipation component (20) comprises: a heat conducting member (21) disposed on a side of the insulating member (30) away from the plurality of solid-state switch units (10); and A heat sink (22) is coupled to the insulating member (30) and the support member (40) on a side of the heat conducting member (21) away from the insulating member (30).
11. The circuit breaker (100) according to any one of claims 1 to 7, characterized in that: Also includes: The leakage switch unit (50) comprises a plurality of connection terminals (51), wherein the plurality of connection terminals (51) are electrically connected to the plurality of solid-state switch units (10) respectively.