Wire-locking shrapnel assembly and circuit breaker

Abstract

The present invention discloses a wire-holding spring assembly and a circuit breaker. The wire-holding spring assembly comprises a first spring body, including a first blade and a second blade connected to the first blade; a second spring body, including a third blade, a fourth blade, and a second support portion, the first spring body and the first spring body being separate components; and two spring supports, one of which abuts against one end of the second blade distal from the first blade, and the other abuts against the other end of the fourth blade distal from the third blade, thereby mounting the first and second spring bodies within the circuit breaker housing. The circuit breaker includes the wire-holding spring assembly described above.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a wire-holding spring assembly and a circuit breaker. Background Art

[0002] Existing circuit breaker wire-holding spring assemblies are typically manufactured using an integrated structure, resulting in complex structures and difficult manufacturing processes, leading to high product costs. Furthermore, when assembling the wire-holding spring assembly with the circuit breaker's terminal block, tools are required to pry the wire-holding spring assembly apart before the circuit breaker's terminal block can be installed within the wire-holding spring assembly. This makes installation more difficult and further increases product costs.

[0003] Therefore, a wire-locking spring assembly is urgently needed to solve the above problems. Summary of the Invention

[0004] The present invention aims to solve, at least to a certain extent, one of the problems existing in the existing related technologies. To this end, the present invention proposes a wire-holding spring assembly that can solve the problems of high manufacturing difficulty and high cost caused by the use of an integrally formed wire-holding spring assembly in the existing technology. It can also solve the problem in the existing technology that due to the small contact area between the conductive wire and the wire-holding spring, local heating occurs at the contact point between the conductive wire and the wire-holding spring when a large current passes through, thereby affecting the performance of the circuit breaker.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A wire clamping shrapnel assembly, comprising:

[0007] A first elastic sheet body, comprising a first blade and a second blade connected to the first blade;

[0008] The second elastic piece body includes a third blade, a fourth blade and a second support portion, and the first elastic piece body and the second elastic piece body are separately provided;

[0009] Two elastic clip supports, one end of the second blade away from the first blade abuts on one elastic clip support, and one end of the fourth blade away from the third blade abuts on the other elastic clip support, so as to install the first elastic clip body and the second elastic clip body in the housing of the circuit breaker.

[0010] Optionally, one end of the second blade away from the first blade abuts against the inner side of one of the elastic fragment supports, and one end of the fourth blade away from the third blade abuts against the inner side of another of the elastic fragment supports.

[0011] Optionally, the first elastic piece body further includes a first supporting portion, one end of the first supporting portion is provided with the first blade, and the other end of the first supporting portion is provided with the second blade, and the first supporting portion is sleeved on a rod of the housing of the circuit breaker.

[0012] Optionally, the bottom side surfaces of the first blade, the second blade and the first support portion are all on the same plane, the bottom side surfaces of the first blade, the second blade and the first support portion are all in contact with the bottom side surface inside the shell, the upper side surfaces of the first blade and the first support portion are all on the same plane and are arranged lower than the upper side surface of the second blade, the upper side surface of the second blade abuts against the inner side surface of the top of the shrapnel support, and the outer side surface of the second blade abuts against the inner side surface of the side portion of the shrapnel support.

[0013] Optionally, the second elastic sheet body further includes a second supporting portion, one end of the second supporting portion is provided with the third blade, the other end of the second supporting portion is provided with the fourth blade, and the second supporting portion is sleeved on the other support rod of the shell.

[0014] Optionally, the bottom side surfaces of the third blade, the fourth blade and the second support portion are all on the same plane, the bottom side surfaces of the third blade, the fourth blade and the second support portion are all in contact with the bottom side surface inside the shell, the upper side surfaces of the third blade and the second support portion are all on the same plane and are arranged lower than the upper side surface of the fourth blade, the upper side surface of the fourth blade abuts against the inner side surface of the top of the shrapnel support, and the outer side surface of the fourth blade abuts against the inner side surface of the side portion of the shrapnel support.

[0015] Optionally, a first groove is formed on the upper side of the first blade, and a second groove is formed on the upper side of the third blade.

[0016] Optionally, a first fool-proof mounting portion is provided on the shell, and a second fool-proof mounting portion corresponding to the first fool-proof mounting portion is provided on the spring support.

[0017] Another aspect of the present invention provides a circuit breaker, comprising a housing and the above-mentioned wire-locking spring assembly.

[0018] Optionally, the shell includes an upper cover and a lower cover, the upper cover and the lower cover are combined to form an accommodating cavity, and the wire-holding spring assembly is disposed in the accommodating cavity.

[0019] Optionally, a first load interface and a second load interface are provided at one end of the lower cover body, an end of the first blade away from the second blade is arranged on the inner side of the first load interface, and an end of the third blade away from the fourth blade is arranged on the inner side of the second load interface.

[0020] Optionally, it also includes a first terminal block and a second terminal block, both of which are arranged in the accommodating cavity, the first end of the first terminal block abuts against the inner side of one of the elastic clip supports, and the first end of the second terminal block abuts against the inner side of the other elastic clip support.

[0021] Optionally, the first end of the first terminal block and the end of the second blade away from the first blade are relatively arranged in the same elastic clip support, and the first end of the second terminal block and the end of the fourth blade away from the third blade are relatively arranged in the same elastic clip support.

[0022] Optionally, it further includes a circuit board and a power board, the circuit board and the power board are electrically connected and are both arranged in the accommodating cavity, and the second end of the first wiring board and the second end of the second wiring board are both electrically connected to the circuit board.

[0023] Optionally, it further includes a support rod, one side surface of the support rod is a first arc surface, the side surface adjacent to the first arc surface is a limiting plane, the inner side surface of the first support portion of the first elastic piece body is a second arc surface, the inner side surface of the second support portion of the second elastic piece body is a third arc surface, the second arc surface is in contact with the first arc surface of one of the support rods, the inner side surface of the second blade is in contact with the limiting plane of the support rod, the third arc surface is in contact with the first arc surface of another support rod, and the inner side surface of the fourth blade is in contact with the limiting plane of the support rod.

[0024] Optionally, a first limit member, a second limit member and a third limit member are further provided on the lower cover body, the first limit member and the second limit member are arranged opposite to each other, the third limit member is located between the first limit member and the second limit member and is arranged opposite to the side of the lower cover body, the first limit member, the second limit member, the third limit member and the side of the lower cover body are combined to form a limit frame, and the spring support is arranged and confined in the limit frame.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] The wire-holding spring assembly provided by the present invention solves the high manufacturing difficulty and high cost issues associated with the prior art use of one-piece wire-holding spring assemblies by providing a separate first and second spring body. Furthermore, the provision of a spring support not only stabilizes the first and second spring bodies within the circuit breaker housing but also compresses the conductive wire against the first and second spring bodies, effectively ensuring a sufficiently large contact area between the conductive wire and the first and second spring bodies. This solves the prior art issue of localized heating at the point of contact between the conductive wire and the wire-holding spring when high current passes, which in turn affects circuit breaker performance, due to the small contact area between the conductive wire and the wire-holding spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional structure of a circuit breaker provided by a specific embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of a circuit breaker with the upper cover removed provided by a specific embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the three-dimensional structure of a circuit breaker provided by a specific embodiment of the present invention with the upper cover, buttons and light guide column removed;

[0030] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is an assembly diagram of a wire-holding spring assembly, a first terminal block, and a second terminal block of a circuit breaker provided by a specific embodiment of the present invention at an angle;

[0032] Figure 6 This is an assembly diagram of the wire-holding spring assembly, the first terminal block, and the second terminal block of the circuit breaker provided by a specific embodiment of the present invention from another angle.

[0033] In the picture:

[0034] 11. Lower cover; 111. First load interface; 112. Second load interface; 113. Support rod; 1131. First arc surface; 1132. Limiting plane; 114. First limiting member; 115. Second limiting member; 116. Third limiting member; 117. Protrusion; 12. Upper cover;

[0035] 21. First spring piece body; 211. First blade; 2111. First groove; 212. Second blade; 213. First support portion; 2131. Second arc surface; 22. Second spring piece body; 221. Third blade; 2211. Second groove; 222. Fourth blade; 223. Second support portion; 2231. Third arc surface;

[0036] 3. Shrapnel support; 31. Slot;

[0037] 41. First wiring board; 42. Second wiring board;

[0038] 5. Circuit board;

[0039] 6. Power board;

[0040] 7. Terminal blocks;

[0041] 8. Button;

[0042] 9. Indicator;

[0043] 10. Light guide column. DETAILED DESCRIPTION

[0044] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0045] Please refer to Figures 1-6 The present invention provides a wire clamping spring assembly, comprising a first spring body 21, a second spring body 22, and two spring supports 3. The first spring body 21 comprises a first blade 211 and a second blade 212 connected to the first blade 211. The second spring body 22 comprises a third blade 221, a fourth blade 222, and a second support portion 223. The first spring body 21 and the second spring body 22 are separately provided. The end of the second blade 212 away from the first blade 211 abuts against one spring support 3, and the end of the fourth blade 222 away from the third blade 221 abuts against the other spring support 3, so that the first spring body 21 and the second spring body 22 are installed in the housing of the circuit breaker.

[0046] The wire-holding spring assembly provided by the present invention solves the problems of high manufacturing difficulty and high cost associated with the prior art use of one-piece wire-holding spring assemblies by separately providing a first spring body 21 and a second spring body 22. The provision of a spring support 3 not only achieves a limiting and fixed effect on the first and second spring bodies 21, 22 within the circuit breaker housing, but also presses the conductive wire against the first and second spring bodies 21, 22. This effectively ensures a sufficiently large contact area between the conductive wire and the first and second spring bodies 21, 22, thereby resolving the prior art problem of localized heating at the contact point between the conductive wire and the wire-holding spring when high current passes, which in turn affects circuit breaker performance, due to the small contact area between the conductive wire and the wire-holding spring.

[0047] Optionally, one elastic fragment support 3 and another elastic fragment support 3 are arranged on both sides of the shell in a mirror-symmetrical manner, so as to achieve a reasonable arrangement of the two elastic fragment supports 3 in the shell.

[0048] Optionally, the first elastic piece body 21 and the second elastic piece body 22 are arranged on both sides of the housing in a mirror-symmetrical manner, so as to achieve a reasonable arrangement of the two first elastic piece bodies 21 in the housing.

[0049] Optionally, the end of the second blade 212 away from the first blade 211 abuts against the inner side of one elastic holder 3 to achieve a limiting effect on the second blade 212. The end of the fourth blade 222 away from the third blade 221 abuts against the inner side of another elastic holder 3 to achieve a limiting effect on the fourth blade 222.

[0050] Optionally, the first spring element body 21 further includes a first support portion 213, with a first blade 211 disposed at one end of the first support portion 213 and a second blade 212 disposed at the other end. The first support portion 213 is sleeved onto a support rod 113 of the circuit breaker housing. Specifically, when the first spring element body 21 is squeezed by the load plug, the first spring element body 21 can be compressed in a predetermined direction under the guidance of the support rod 113, thereby preventing the first spring element body 21 from shifting under the action of external forces and ensuring the stability of the first spring element body 21.

[0051] Optionally, the bottom side surfaces of the first blade 211, the second blade 212 and the first support portion 213 are all on the same plane, the bottom side surfaces of the first blade 211, the second blade 212 and the first support portion 213 are all in contact with the bottom side surfaces inside the shell, the upper side surfaces of the first blade 211 and the first support portion 213 are all on the same plane and are arranged lower than the upper side surface of the second blade 212, the upper side surface of the second blade 212 abuts against the inner side surface of the top of the shrapnel support 3, and the outer side surface of the second blade 212 abuts against the inner side surface of the side of the shrapnel support 3. Specifically, because the bottom sides of the first blade 211, the second blade 212, and the first support portion 213 all fit against the bottom side of the housing, the top side of the second blade 212 abuts against the inner side of the top of the spring clip holder 3, and the outer side of the second blade 212 abuts against the inner side of the side portion of the spring clip holder 3, the first spring clip body 21 is stably installed in the housing and the contact area between the first spring clip body 21 and the spring clip holder 3 is increased, thereby avoiding the problem of overheating between the first spring clip body 21 and the spring clip holder 3 when a large current flows. Arranging the top sides of the first blade 211 and the first support portion 213 lower than the top side of the second blade 212 can prevent the elastic force of the first spring clip body 21 from being too strong, making the first spring clip body 21 more suitable for use.

[0052] Furthermore, the second blade 212 includes a first segment and a second segment, the upper side surface of the first segment and the upper side surface of the first blade 211 are located on the same plane, the upper side surface of the second segment is higher than the upper side surface of the first segment and abuts against the inner side surface of the top of the shrapnel support 3 to further reduce the elastic force of the first shrapnel body 21.

[0053] Optionally, the second elastic member 22 further includes a second support portion 223, one end of which is provided with a third blade 221, and the other end of which is provided with a fourth blade 222. The second support portion 223 is sleeved onto another support rod 113 of the housing. Specifically, when the second elastic member 22 is squeezed by the load plug, the second elastic member 22 can be compressed in a predetermined direction under the guidance of the support rod 113, thereby preventing the second elastic member 22 from shifting under the action of external forces and ensuring the stability of the second elastic member 22.

[0054] Optionally, the bottom side surfaces of the third blade 221, the fourth blade 222 and the second support portion 223 are all on the same plane, the bottom side surfaces of the third blade 221, the fourth blade 222 and the second support portion 223 are all in contact with the bottom side surfaces inside the shell, the upper side surfaces of the third blade 221 and the second support portion 223 are all on the same plane and are arranged lower than the upper side surface of the fourth blade 222, the upper side surface of the fourth blade 222 abuts against the inner side surface of the top of the shrapnel support 3, and the outer side surface of the fourth blade 222 abuts against the inner side surface of the side of the shrapnel support 3. Specifically, since the bottom sides of the third blade 221, the fourth blade 222, and the second support portion 223 all fit against the bottom side of the housing, the top side of the fourth blade 222 abuts against the inner side of the top of the spring clip holder 3, and the outer side of the fourth blade 222 abuts against the inner side of the side portion of the spring clip holder 3, the second spring clip body 22 is stably installed in the housing and the contact area between the second spring clip body 22 and the spring clip holder 3 is increased, thereby avoiding the problem of overheating between the second spring clip body 22 and the spring clip holder 3 when a large current flows. By setting the top side of the third blade 221 and the second support portion 223 lower than the top side of the fourth blade 222, the elastic force of the second spring clip body 22 is prevented from being too strong, making the second spring clip body 22 more suitable for use.

[0055] Furthermore, the fourth blade 222 includes a third segment and a fourth segment, the upper side surface of the third segment and the upper side surface of the third blade 221 are located on the same plane, the upper side surface of the fourth segment is higher than the upper side surface of the third segment and abuts against the inner side surface of the top of the shrapnel support 3 to further reduce the elastic force of the second shrapnel body 22.

[0056] Optionally, a first groove 2111 is formed on the upper side of the first blade 211 to further reduce the elastic force of the first elastic body 21, making the first elastic body 21 more suitable for use. A second groove 2211 is formed on the upper side of the third blade 221 to further reduce the elastic force of the second elastic body 22, making the second elastic body 22 more suitable for use.

[0057] Optionally, a first foolproof mounting portion is provided on the housing, and a second foolproof mounting portion is provided on the spring clip support 3, which corresponds to the first foolproof mounting portion. When installing the spring clip support 3, since the first foolproof mounting portion needs to cooperate with the second foolproof mounting portion, incorrect installation of the spring clip support 3 in the housing can be avoided.

[0058] Specifically, the first foolproof mounting portion is one of the slot 31 and the protrusion 117, and the second foolproof mounting portion is the other of the slot 31 and the protrusion 117. Only when the spring clip holder 3 is properly installed in the housing can the protrusion 117 be locked in the slot 31, thereby achieving the foolproof installation function. In this embodiment, the slots 31 are formed on both sides of the spring clip holder 3 (i.e., the structures of the two spring clip holders 3 are identical), and the protrusions 117 are also provided on the corresponding sides of the housing. This allows the spring clip holder 3 to be freely interchangeably installed in the housing, thereby reducing production costs and facilitating assembly.

[0059] Another aspect of the present invention provides a circuit breaker, comprising a housing and the above-mentioned wire-locking spring assembly.

[0060] Optionally, the housing includes an upper cover 12 and a lower cover 11 , the upper cover 12 and the lower cover 11 enclose a receiving cavity, and the wire-holding spring assembly is disposed in the receiving cavity to protect the wire-holding spring assembly.

[0061] Optionally, a first load interface 111 and a second load interface 112 are formed at one end of the lower cover 11, and an end of the first blade 211 away from the second blade 212 is disposed on the inner side of the first load interface 111, so that a plug of a load can abut against the first blade 211 after being inserted into the first load interface 111. An end of the third blade 221 away from the fourth blade 222 is disposed on the inner side of the second load interface 112, so that a plug of a load can abut against the third blade 221 after being inserted into the second load interface 112.

[0062] Specifically, one of the first blade 211 and the third blade 221 is the negative pole of the circuit breaker, and the other is the positive pole of the circuit breaker.

[0063] Optionally, the circuit breaker further includes a first terminal block 41 and a second terminal block 42, both of which are disposed within the accommodating chamber to protect the first terminal block 41 and the second terminal block 42. The first end of the first terminal block 41 abuts against the inner side of a spring holder 3, that is, by providing a spring holder 3, it is possible to achieve both the positional fixation of the first spring assembly within the housing and the positional fixation of the first terminal block 41 within the housing. The first end of the second terminal block 42 abuts against the inner side of another spring holder 3, that is, by providing another spring holder 3, it is possible to achieve both the positional fixation of the second spring assembly within the housing and the positional fixation of the second terminal block 42 within the housing. This further simplifies the structure of the circuit breaker and improves the stability of the circuit breaker. Since the first spring clip body 21, the second spring clip body 22, the conductive wire, the first terminal block 41 and the second terminal block 42 are all fixed in position within the shell by the spring clip support 3, when it is necessary to realize electrical connection between the first spring clip body 21, the second spring clip body 22, the conductive wire, the first terminal block 41 and the second terminal block 42, it is only necessary to first place the first spring clip body 21, the second spring clip body 22, the conductive wire, the first terminal block 41 and the second terminal block 42 in the shell according to the preset position, and then install the two spring clip supports 3. This can simultaneously limit and fix the first spring clip body 21, the second spring clip body 22, the conductive wire, the first terminal block 41 and the second terminal block 42 in the shell. After that, the upper cover body is installed to realize the fixation of the first spring clip body 21, the second spring clip body 22, the conductive wire, the first terminal block 41, the second terminal block 42 and the two spring clip supports 3 in the shell, making installation simple.

[0064] Optionally, the first end of the first terminal block 41 and the end of the second blade 212 away from the first blade 211 are relatively arranged in the same spring holder 3, and the first end of the second terminal block 42 and the end of the fourth blade 222 away from the third blade 221 are relatively arranged in the same spring holder 3.

[0065] Optionally, the first wiring board 41 is disposed on one side of the housing, and the second wiring board 42 is disposed on the other side of the housing and is opposite to the first wiring board 41 .

[0066] Optionally, a circuit board 5 and a power board 6 are also included. The circuit board 5 and the power board 6 are electrically connected and are both arranged in the accommodating cavity. The second end of the first wiring board 41 and the second end of the second wiring board 42 are both electrically connected to the circuit board 5.

[0067] Optionally, it further includes a support rod 113, one side surface of the support rod 113 is a first arc surface 1131, and the side surface adjacent to the first arc surface 1131 is a limiting plane 1132. The inner side surface of the first support portion 213 of the first elastic piece body 21 is a second arc surface 2131, and the inner side surface of the second support portion 223 of the second elastic piece body 22 is a third arc surface 2231. The second arc surface 2131 is in contact with the first arc surface 1131 of the support rod 113, and the inner side surface of the second blade 212 is in contact with the limiting plane 1132 of the support rod 113 to improve the matching stability between the second blade 212 and the first support portion 213 and the support rod 113, so that the first elastic piece body 21 can be more stably installed in the shell, thereby ensuring that the first elastic piece body 21 has better elastic force. The third arc surface 2231 fits with the first arc surface 1131 of the other support rod 113, and the inner side surface of the fourth blade 222 fits with the limiting plane 1132 of the support rod 113, so that the second elastic body 22 can be more stably installed in the shell, thereby ensuring that the second elastic body 22 has good elastic force.

[0068] Optionally, a first limiting member 114, a second limiting member 115 and a third limiting member 116 are further provided on the lower cover body 11. The first limiting member 114 and the second limiting member 115 are arranged opposite to each other, and the third limiting member 116 is located between the first limiting member 114 and the second limiting member 115 and is arranged opposite to the side of the lower cover body 11. The first limiting member 114, the second limiting member 115, the third limiting member 116 and the side of the lower cover body 11 are combined to form a limiting frame, and the spring holder 3 is arranged and confined in the limiting frame, thereby ensuring the installation stability of the spring holder 3 in the shell.

[0069] Optionally, the circuit board 5 and the power board 6 are arranged in parallel to reduce the volume of the circuit breaker.

[0070] Optionally, a button 8 is also included. The button 8 is arranged at the end of the lower cover 11 and extends into the accommodating cavity to be electrically connected to the circuit board 5 for controlling the opening and closing of the circuit breaker. Long pressing the button 8 can also perform address configuration.

[0071] Optionally, an indicator 9 and a light guide column 10 are further included. The indicator 9 is arranged at the end of the lower cover 11 and is electrically connected to the circuit board 5 through the light guide column 10 .

[0072] Optionally, a connection terminal 7 is further included, and the connection terminal 7 is arranged at the end of the shell.

[0073] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A circuit breaker, comprising a housing, characterized in that: It also includes a wire clamping shrapnel assembly, which includes: A first elastic sheet body (21) comprises a first blade (211) and a second blade (212) connected to the first blade (211); A second elastic sheet body (22) comprises a third blade (221), a fourth blade (222) and a second support portion (223), wherein the first elastic sheet body (21) and the second elastic sheet body (22) are separately provided; Two elastic fragment supports (3), one end of the second blade (212) away from the first blade (211) abuts against one of the elastic fragment supports (3), and one end of the fourth blade (222) away from the third blade (221) abuts against the other of the elastic fragment supports (3), so as to install the first elastic fragment body (21) and the second elastic fragment body (22) in the housing of the circuit breaker; The shell comprises an upper cover (12) and a lower cover (11), wherein the upper cover (12) and the lower cover (11) enclose a receiving cavity, and the wire clamping spring assembly is arranged in the receiving cavity; The invention also includes a support rod (113), one side surface of the support rod (113) is a first arc surface (1131), the side surface adjacent to the first arc surface (1131) is a limiting plane (1132), the inner side surface of the first supporting portion (213) of the first elastic sheet body (21) is a second arc surface (2131), the inner side surface of the second supporting portion (223) of the second elastic sheet body (22) is a third arc surface (2231), and the second arc surface (2131) is in contact with the first arc surface (1131) of one of the support rods (113), the inner side surface of the second blade (212) is in contact with the limiting plane (1132) of the support rod (113), the third arc surface (2231) is in contact with the first arc surface (1131) of another support rod (113), and the inner side surface of the fourth blade (222) is in contact with the limiting plane (1132) of the support rod (113).

2. The circuit breaker according to claim 1, wherein: One end of the second blade (212) away from the first blade (211) abuts against the inner side of one of the elastic sheet supports (3), and one end of the fourth blade (222) away from the third blade (221) abuts against the inner side of another of the elastic sheet supports (3).

3. The circuit breaker according to claim 1, wherein: The first spring body (21) further comprises a first support portion (213), one end of the first support portion (213) being provided with the first blade (211), and the other end being provided with the second blade (212), and the first support portion (213) being sleeved on a support rod (113) of the housing of the circuit breaker.

4. The circuit breaker according to claim 3, characterized in that The bottom side surfaces of the first blade (211), the second blade (212) and the first support portion (213) are all on the same plane, the bottom side surfaces of the first blade (211), the second blade (212) and the first support portion (213) are all in contact with the bottom side surface inside the shell, the upper side surfaces of the first blade (211) and the first support portion (213) are all on the same plane and are arranged lower than the upper side surface of the second blade (212), the upper side surface of the second blade (212) is in contact with the inner side surface of the top of the elastic fragment support (3), and the outer side surface of the second blade (212) is in contact with the inner side surface of the side portion of the elastic fragment support (3).

5. The circuit breaker according to claim 3, characterized in that The second elastic sheet body (22) further comprises a second supporting portion (223), one end of the second supporting portion (223) being provided with the third blade (221), and the other end being provided with the fourth blade (222), and the second supporting portion (223) being sleeved on the other support rod (113) of the housing.

6. The circuit breaker according to claim 5, characterized in that The bottom side surfaces of the third blade (221), the fourth blade (222) and the second support portion (223) are all on the same plane, and the bottom side surfaces of the third blade (221), the fourth blade (222) and the second support portion (223) are all in contact with the bottom side surface inside the shell. The upper side surfaces of the third blade (221) and the second support portion (223) are all on the same plane and are arranged lower than the upper side surface of the fourth blade (222). The upper side surface of the fourth blade (222) is in contact with the inner side surface of the top of the spring support (3), and the outer side surface of the fourth blade (222) is in contact with the inner side surface of the side portion of the spring support (3).

7. The circuit breaker according to claim 1, wherein: A first groove (2111) is provided on the upper side of the first blade (211), and a second groove (2211) is provided on the upper side of the third blade (221).

8. The circuit breaker according to any one of claims 1 to 7, characterized in that: The housing is provided with a first fool-proof mounting portion, and the spring support (3) is provided with a second fool-proof mounting portion corresponding to the first fool-proof mounting portion.

9. The circuit breaker according to claim 8, characterized in that One end of the lower cover (11) is provided with a first load interface (111) and a second load interface (112); an end of the first blade (211) away from the second blade (212) is arranged on the inner side of the first load interface (111); and an end of the third blade (221) away from the fourth blade (222) is arranged on the inner side of the second load interface (112).

10. The circuit breaker according to claim 8, wherein: The invention also includes a first wiring board (41) and a second wiring board (42), wherein the first wiring board (41) and the second wiring board (42) are both arranged in the accommodating cavity, the first end of the first wiring board (41) abuts against the inner side of one of the elastic sheet supports (3), and the first end of the second wiring board (42) abuts against the inner side of the other elastic sheet support (3).

11. The circuit breaker according to claim 10, characterized in that The first end of the first terminal block (41) and the end of the second blade (212) away from the first blade (211) are arranged relative to each other in the same spring support (3), and the first end of the second terminal block (42) and the end of the fourth blade (222) away from the third blade (221) are arranged relative to each other in the same spring support (3).

12. The circuit breaker according to claim 10, wherein: It also includes a circuit board (5) and a power board (6), wherein the circuit board (5) and the power board (6) are electrically connected and are both arranged in the accommodating cavity, and the second end of the first wiring board (41) and the second end of the second wiring board (42) are both electrically connected to the circuit board (5).

13. The circuit breaker according to claim 1, wherein: The lower cover (11) is further provided with a first limiting member (114), a second limiting member (115) and a third limiting member (116); the first limiting member (114) and the second limiting member (115) are arranged opposite to each other; the third limiting member (116) is located between the first limiting member (114) and the second limiting member (115) and is arranged opposite to the side of the lower cover (11); the first limiting member (114), the second limiting member (115), the third limiting member (116) and the side of the lower cover (11) are combined to form a limiting frame; the spring support (3) is arranged and confined within the limiting frame.

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