Turn-off device

Abstract

The utility model belongs to the field of photovoltaic technology, and discloses a turn-off device which comprises a shell body and two bases, the two bases are arranged at the two ends of the shell body in the first direction in a one-to-one correspondence mode, each base comprises a fixing face, and the fixing faces protrude out of the bottom face of the shell body in the second direction. According to the turn-off device provided by the utility model, after the turn-off device is fixed on the photovoltaic module, the fixed surface is in contact with the photovoltaic module, and the fixed surface of the base protrudes out of the bottom surface of the shell main body, so that a ventilation channel for ventilation is formed among the two bases, the bottom surface of the shell main body and the photovoltaic module; after air flows through the ventilation channel, heat emitted by the turn-off device can be taken away, the heat dissipation effect of the turn-off device is effectively improved, the shielding area of the shell body to the photovoltaic module can be reduced, and the power generation efficiency of the photovoltaic module can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic technology, in particular to a disconnector. Background Art

[0002] An intelligent disconnector is a connection product with a disconnection function used in a photovoltaic power station. When an abnormality occurs in a photovoltaic module, the disconnector can actively disconnect to avoid the failure of the entire string.

[0003] Currently, after the disconnector is fixed, there is a large contact area between the disconnector and the photovoltaic module, which is not conducive to the heat dissipation of the disconnector. Poor heat dissipation may cause the disconnector to burn out, thus triggering safety problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a disconnector, which can effectively improve the heat dissipation capacity of the disconnector.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provide a disconnector, including:

[0007] A housing main body;

[0008] Two bases, which are respectively arranged at both ends of the housing main body along the first direction in one-to-one correspondence. The base includes a fixing surface, and the fixing surface protrudes from the bottom surface of the housing main body along the second direction; wherein, the first direction and the second direction are perpendicular to each other.

[0009] Optionally, first base buckles are arranged on both sides of the base along the third direction, and corresponding card holes are arranged on the housing main body. The first base buckles are clamped with the card holes; wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0010] Optionally, a second base buckle is arranged on one side of the base protruding from the housing main body along the first direction, and the second base buckle is clamped with the top surface of the housing main body along the second direction.

[0011] Optionally, a base fence is arranged on the base, and both the first base buckle and the second base buckle are arranged on the base fence.

[0012] Optionally, the base fence includes first side plates arranged opposite to each other along the third direction;

[0013] Limiting grooves corresponding to the first side plates are arranged on the housing main body, and the first side plates are located in the limiting grooves.

[0014] Optionally, the base side plate includes an end plate protruding from the housing body along the first direction, and two second base buckles are provided on the end plate at intervals along the third direction.

[0015] Optionally, a circuit board and a wire pressing buckle are provided inside the housing body. The circuit board can be electrically connected to an external wire, and the wire pressing buckle is used to seal the gap between the external wire and the housing body.

[0016] Optionally, the housing body includes a top shell. An installation groove and a positioning groove communicating with the installation groove are provided on the top shell along the second direction. The circuit board is arranged in the installation groove, and the wire pressing buckle is arranged in the positioning groove.

[0017] Optionally, the housing body further includes a bottom cover. The bottom cover is covered on the top shell along the second direction. A bottom cover buckle is provided on the bottom cover, and a card slot is provided on the wire pressing buckle. The bottom cover buckle is snap-connected with the card slot.

[0018] Optionally, a plurality of heat dissipation grooves are provided at intervals on one side of the top shell along the second direction facing away from the bottom cover.

[0019] Beneficial effects:

[0020] For the disconnector provided by the present utility model, after the disconnector is fixed on the photovoltaic module, the fixing surface contacts the photovoltaic module. Since the fixing surface of the base protrudes from the bottom surface of the housing body, an air ventilation channel for air circulation is formed between the two bases, the bottom surface of the housing body and the photovoltaic module. After the air flows through the ventilation channel, the heat dissipated by the disconnector will be carried away, effectively improving the heat dissipation effect of the disconnector. In addition, since the fixing surface of the base protrudes from the bottom surface of the housing body, the shielding area of the housing body on the photovoltaic module can be reduced, which is beneficial to improving the power generation efficiency of the photovoltaic module. Description of the drawings

[0021] Figure 1 is a schematic structural diagram of the disconnector provided by the present utility model;

[0022] Figure 2 is an exploded structural diagram of the disconnector provided by the present utility model;

[0023] Figure 3 is a schematic structural diagram of the base provided by the present utility model;

[0024] Figure 4 is a schematic structural diagram of the wire pressing buckle provided by the present utility model;

[0025] Figure 5 is a partial structural schematic diagram of the disconnector provided by the present utility model;

[0026] Figure 6 is a schematic structural diagram of the top shell provided by the present utility modelFigure 1 ;

[0027] Figure 7 This is a schematic diagram of the structure of the top shell provided by the utility model Figure 2 ;

[0028] Figure 8 It is a structural schematic diagram of the circuit board provided by the utility model;

[0029] Figure 9 This is a structural cross-sectional view of the circuit breaker provided by the utility model. Figure 1 ;

[0030] Figure 10 This is a structural cross-sectional view of the circuit breaker provided by the utility model. Figure 2 ;

[0031] Figure 11 It is a structural schematic diagram of the bottom cover provided by the utility model;

[0032] Figure 12 This is a structural cross-sectional view of the circuit breaker provided by the utility model. Figure 3 ;

[0033] Figure 13 It is a schematic diagram of the top shell and the structure inside the top shell provided by the utility model.

[0034] In the figure:

[0035] 100, shell body; 110, top shell; 111, card hole; 112, limit groove; 113, installation groove; 1131, clearance wall; 114, positioning groove; 115, heat dissipation groove; 116, glue groove; 1161, top shell enclosure; 1162, first gap; 1163, second gap; 117, support column; 1171, positioning boss; 118, glue leakage gap; 119, clearance groove; 120, bottom cover; 121, bottom cover buckle; 122, protrusion; 123, exhaust gap;

[0036] 200, base; 201, fixing surface; 210, first base buckle; 220, second base buckle; 230, base enclosure; 231, first side plate; 232, end plate; 233, second side plate;

[0037] 300, circuit board; 310, wiring piece; 320, heating element; 330, edge surface;

[0038] 400, wire pressing buckle; 410, wire pressing groove; 411, convex rib; 420, card slot;

[0039] 500. External wire. DETAILED DESCRIPTION

[0040] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0041] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0043] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0044] Refer to Figures 1 to 3 As shown, this embodiment provides a disconnector, which includes a housing main body 100 and a base 200. There are two bases 200, and they are respectively and correspondingly arranged at both ends of the housing main body 100 along the first direction. The base 200 includes a fixing surface 201, and the fixing surface 201 protrudes from the bottom surface of the housing main body 100 along the second direction; wherein, the first direction and the second direction are perpendicular to each other. As shown in the figure, the a direction in the figure can be the first direction, the first direction can be the length direction of the disconnector, the b direction is the second direction, and the second direction can be the height direction of the disconnector.

[0045] After the circuit breaker is fixed on the photovoltaic module, the fixing surface 201 contacts the photovoltaic module. Since the fixing surface 201 of the base 200 is protruding from the bottom surface of the shell body 100, a ventilation channel for air circulation is formed between the two bases 200, the bottom surface of the shell body 100 and the photovoltaic module. After the air flows through the ventilation channel, it will take away the heat emitted by the circuit breaker, effectively improving the heat dissipation effect of the circuit breaker. And the base 200 is provided at both ends of the shell body 100 along the first direction, which effectively ensures the stable connection of the photovoltaic module. In addition, the fixing surface 201 of the base 200 is protruding from the bottom surface of the shell body 100, which can reduce the shielding area of ​​the photovoltaic module by the shell body 100, which is conducive to improving the power generation efficiency of the photovoltaic module.

[0046] In this embodiment, continue to refer to Figures 1 to 3 As shown, the base 200 is provided with first base buckles 210 on both sides along the third direction, and the shell body 100 is provided with a buckle hole 111 corresponding to the first base buckle 210, and the first base buckle 210 is buckled with the buckle hole 111 for easy disassembly and assembly; wherein, the first direction, the second direction and the third direction are perpendicular to each other, and the c direction in the figure is the third direction, and the third direction can be the width direction of the circuit breaker. In this embodiment, the buckle hole 111 can not only cooperate with the first base buckle 210, but also in some special application scenarios, the base 200 is separated, and the buckle hole 111 is passed through the cable tie to tie the circuit breaker to the bracket of the photovoltaic module to improve applicability.

[0047] In a feasible embodiment, a second base buckle 220 is provided on one side of the base 200 protruding from the shell body 100 along the first direction, and the second base buckle 220 is snap-connected with the top surface of the shell body 100 along the second direction to ensure a firm connection between the base 200 and the shell body 100.

[0048] Specifically, a base enclosure 230 is provided on the base 200, and the first base buckle 210 and the second base buckle 220 are both provided on the base enclosure 230, which effectively ensures the structural strength of the first base buckle 210 and the second base buckle 220, so that the connection between the base 200 and the shell body 100 is stable and reliable.

[0049] Exemplarily, the base enclosure 230 includes a first side plate 231 relatively arranged along a third direction, and a limiting groove 112 corresponding to the first side plate 231 is provided on the shell body 100. The first side plate 231 is located in the limiting groove 112 to realize the positioning of the base 200 along the first direction.

[0050] Exemplarily, the first base buckle 210 can be arranged on the first side plate 231 on the corresponding side, that is, the buckle hole 111 is located at the limiting groove 112, which effectively ensures the compactness of the structure of the shell body 100.

[0051] Exemplarily, the base shroud 230 includes an end plate 232 protruding from the housing body 100 along the first direction. Two second base buckles 220 are provided on the end plate 232 at intervals along the third direction, ensuring a stable and reliable connection between the base 200 and the housing body 100.

[0052] Exemplarily, the base shroud 230 includes second side plates 233 oppositely arranged along the third direction. The second side plates 233 are located between the first side plate 231 and the end plate 232. The first side plate 231 and the end plate 232 are connected into one body through the second side plates 233 to ensure the structural strength of the base 200.

[0053] In this embodiment, referring to Figure 1 、 Figure 2 、 Figures 4 to 6 As shown, a circuit board 300 and a wire pressing buckle 400 are provided in the housing body 100. The circuit board 300 can be electrically connected to an external wire 500. The wire pressing buckle 400 is used to seal the gap between the external wire 500 and the housing body 100. In this embodiment, potting glue is filled between the circuit board 300 and the housing body 100. The setting of the wire pressing buckle 400 effectively prevents the potting glue from flowing out of the installation groove 113. In addition, two second base buckles 220 are provided on the end plate 232 at intervals along the third direction, which can give way to the external wire 500 to avoid position interference. Among them, the heat dissipated by the circuit board 300 can be conducted to the housing body 100 through the potting glue, and then the housing body 100 contacts the air for heat dissipation.

[0054] Exemplarily, the wire pressing buckle 400 is provided with wire pressing grooves 410 corresponding to the external wires 500 one by one. At least one rib 411, for example two ribs, is provided in the wire pressing grooves 410. The external wire 500 is located in the corresponding wire pressing groove 410, and the external wire 500 is squeezed by the rib 411 to ensure the sealing between the external wire 500, the wire pressing buckle 400 and the housing body 100.

[0055] Exemplarily, the circuit board 300 is connected to the external wire 500 through a wiring tab 310. Optionally, at least one wiring tab 310 electrically connected to the external wire 500, for example two wiring tabs, is provided at both ends of the circuit board 300 along the first direction.

[0056] Specifically, the housing body 100 includes a top shell 110. An installation groove 113 and a positioning groove 114 communicating with the installation groove 113 are provided on the top shell 110 along the second direction. The circuit board 300 is arranged in the installation groove 113, and the wire pressing buckle 400 is arranged in the positioning groove 114 to facilitate the positioning and assembly of the circuit board 300 and the wire pressing buckle 400. Among them, card holes 111 are provided on both sides of the top shell 110 along the third direction, and the second base buckles 220 are clamped with the top shell 110.

[0057] Specifically, the housing body 100 further includes a bottom cover 120. The bottom cover 120 is covered on the top shell 110 along the second direction. A bottom cover buckle 121 is provided on the bottom cover 120, and a card slot 420 is provided on the wire pressing buckle 400. The bottom cover buckle 121 is clamped with the card slot 420 to realize the connection between the bottom cover 120 and the wire pressing buckle 400, and to realize the positioning and assembly between the bottom cover 120 and the top shell 110. Wherein, limiting grooves 112 are provided on both sides of the top shell 110 and the bottom cover 120 along the third direction.

[0058] In a feasible implementation manner, as Figure 2 and Figure 7 shown, a plurality of heat dissipation grooves 115 are spaced on the side of the top shell 110 facing away from the bottom cover 120 along the second direction to increase the surface area of heat exchange between the top shell 110 and the air and improve the heat dissipation effect of the disconnector.

[0059] Exemplarily, the heat dissipation grooves 115 can be spaced along the first direction, and the heat dissipation grooves 115 are strip-shaped and arranged at an angle with the third direction to further increase the surface area of heat exchange between the top shell 110 and the air. Optionally, the angle between the heat dissipation grooves 115 and the second direction can be 5° - 60°.

[0060] Exemplarily, both ends of the heat dissipation grooves 115 can penetrate through the top shell 110 to make the air flow smoothly in the heat dissipation grooves 115, which can further improve the heat dissipation effect of the disconnector.

[0061] In this embodiment, referring to Figure 6 、 Figures 8 to 10 shown, a heating element 320 is provided on the circuit board 300, and a glue groove 116 is provided in the installation groove 113. The heating element 320 is located in the glue groove 116. When assembling the disconnector, potting glue can be filled in the glue groove 116 first, and the circuit board 300 can be installed in the installation groove 113 of the top shell 110. The heating element 320 extrudes the potting glue in the glue groove 116 so that the potting glue in the glue groove 116 can tightly wrap the heating element 320, effectively preventing voids from being generated between the heating element 320 and the potting glue; then potting glue is filled in the installation groove 113 of the top shell 110 to make the potting glue wrap other areas of the circuit board 300 except the heating element 320; finally, the bottom cover 120 is covered on the top shell 110, and the potting glue is filled in a divided way, effectively preventing voids from being generated between the circuit board 300 and the potting glue, and further preventing the situation that the circuit board 300 is burned due to poor local heat dissipation of the circuit board 300.

[0062] In a feasible implementation, since the heat dissipated by the heating element 320 is greater than that dissipated by other areas of the circuit board 300, a highly thermally conductive potting compound can be filled in the glue groove 116 to accelerate the heat dissipation of the heating element 320, and a common thermally conductive potting compound can be filled in the installation groove 113 to assist in the heat dissipation of other areas of the circuit board 300 except the heating element 320.

[0063] Exemplarily, the heating element 320 includes but is not limited to diodes, chips, capacitors, and inductors.

[0064] Exemplarily, there is at least one glue groove 116, and each glue groove 116 can accommodate at least one heating element 320. As Figure 6 and Figure 8 shown, there are two glue grooves 116 in the installation groove 113, and there are three heating elements 320 on the circuit board 300. Two heating elements 320 are accommodated in one glue groove 116, and one heating element 320 is accommodated in the other glue groove 116.

[0065] Exemplarily, the opening of the glue groove 116 faces the second direction. Specifically, a top shell enclosing plate 1161 is provided at the bottom of the installation groove 113. The top shell enclosing plate 1161 encloses to form the glue groove 116, and a first gap 1162 is formed between the end of the top shell enclosing plate 1161 and the circuit board 300. Among them, the potting compound can be filled to the Figure 10 dotted line position in. During the assembly of the disconnector, when the circuit board 300 is installed in the installation groove 113 of the top shell 110, the heating element 320 squeezes the potting compound in the glue groove 116, and the potting compound overflows into the first gap 1162. Relying on the tension of the potting compound, the potting compound can be kept in the first gap 1162, thereby ensuring that the potting compound can tightly wrap the heating element 320 and effectively preventing voids from being generated between the circuit board 300 at the first gap 1162 and the potting compound. Optionally, the dimension h1 of the first gap 1162 in the second direction is 0.2 mm - 2 mm, such as 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, or 1.5 mm.

[0066] Exemplarily, a second gap 1163 is formed between the bottom of the glue groove 116 and the heating element 320. There may be deviations in the size of the heating element 320. Through the setting of the second gap 1163, installation interference between the heating element 320 and the bottom of the glue groove 116 can be prevented. Optionally, the dimension h2 of the second gap 1163 in the second direction is 0.2 mm - 2 mm, such as 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, or 1.5 mm. A smaller second gap 1163 can reduce the distance for the heat of the heating element 320 to be conducted out of the top shell 110 and increase the heat dissipation efficiency of the heating element 320.

[0067] Exemplarily, a plurality of support columns 117 are provided in the installation groove 113. A positioning boss 1171 is provided at the end of the support column 117. The circuit board 300 abuts against the end of the support column 117. The positioning boss 1171 can penetrate through the circuit board 300 or abut against the edge of the circuit board 300 to achieve the positioning and assembly of the circuit board 300.

[0068] In this embodiment, referring to Figures 11 to 13 as shown, a protrusion 122 is provided on one side of the bottom cover 120 facing the top shell 110 along the second direction. When assembling the disconnector, the potting glue in the installation groove 113 will not fill the entire installation groove 113. For example, the potting glue is filled to the position of the dotted line in Figure 12 . During the process of covering the bottom cover 120 on the top shell 110, the protrusion 122 will squeeze the potting glue, and the liquid level of the potting glue in the installation groove 113 will rise, so that the potting glue fills the space enclosed by the bottom cover 120 and the top shell 110, effectively preventing voids from being generated between the potting glue, the bottom cover 120 and the top shell 110, and effectively ensuring the heat dissipation effect of the disconnector. In addition, by squeezing the potting glue with the protrusion 122, it helps the potting glue to tightly wrap the entire circuit board 300; the protrusion 122 can also increase the contact area between the bottom cover 120 and the potting glue, improving the heat dissipation effect of the disconnector.

[0069] Exemplarily, a plurality of protrusions 122 are provided, and an exhaust gap 123 is formed between two adjacent protrusions 122. During the process of covering the bottom cover 120 on the top shell 110, due to the arrangement of the exhaust gap 123, it is beneficial to discharge the gas in the space enclosed by the bottom cover 120 and the top shell 110, preventing voids from being formed between the potting glue and the bottom cover 120. In addition, the exhaust gap 123 can increase the contact area between the potting glue and the bottom cover 120, improve the heat dissipation effect of the disconnector, and make the bonding between the potting glue and the bottom cover 120 firm and reliable.

[0070] Exemplarily, the plurality of protrusions 122 are arranged at intervals along the first direction.

[0071] Exemplarily, the cross-section of the protrusion 122 perpendicular to the first direction is arc-shaped, effectively preventing voids from being formed between the potting glue and the bottom cover 120. Of course, the cross-section of the protrusion 122 perpendicular to the first direction can also be polygonal or other shapes, which are not limited in this application.

[0072] Exemplarily, along the first direction, the cross-sectional area of the protrusion 122 from the middle protrusion 122 to the protrusions 122 at both ends decreases in sequence, effectively preventing the potting glue from overflowing between the top shell 110 and the bottom cover 120.

[0073] Exemplarily, along the first direction, the cross-sectional area of the protrusion 122 near the middle of the bottom cover 120 is larger than the cross-sectional area of the protrusion 122 far from the middle of the bottom cover 120, effectively preventing the potting glue from overflowing between the top shell 110 and the bottom cover 120.

[0074] In a feasible implementation, in order to ensure that the potting glue fills the space enclosed by the bottom cover 120 and the top shell 110, and to avoid the fluidity problem caused by the potting glue tension causing a gap on the side of the circuit board 300 facing the bottom of the installation groove 113, the installation groove 113 includes two relative clearance walls 1131 arranged along the third direction, and a leakage gap 118 is formed between the circuit board 300 and the two clearance walls 1131. Along the first direction, the groove width of the middle area of ​​the leakage gap 118 is greater than the groove width of the two end areas. The groove width refers to the size of the leakage gap 118 along the third direction.

[0075] For example, the cross section of the clearance wall 1131 perpendicular to the second direction may be arc-shaped to ensure that the groove width in the middle area of ​​the leakage gap 118 is greater than the groove width at both end areas. Of course, the cross section of the clearance wall 1131 perpendicular to the second direction may also be a broken line or other shapes, which is not limited in this application.

[0076] Exemplarily, the circuit board 300 includes two edge surfaces 330 arranged opposite to each other along a third direction. The edge surfaces 330 can be arranged perpendicular to the third direction, and a glue leakage gap 118 is formed between the edge surfaces 330 and the corresponding side concession walls 1131 to facilitate the molding of the circuit board 300.

[0077] In a possible implementation, Figure 12 As shown, in order to ensure the sealing and firmness of the connection between the top shell 110 and the bottom cover 120 , a clearance groove 119 is provided at one end of the top shell 110 facing the bottom cover 120 , and the bottom cover 120 is disposed in the clearance groove 119 .

[0078] In a feasible implementation, the bottom cover 120 is provided with a glue injection port and an exhaust hole that are connected to the mounting groove 113. In this embodiment, the bottom cover 120 can be firstly placed on the top shell 110, and then the mounting groove 113 is filled with potting glue through the glue injection port, and the exhaust hole is used to exhaust the gas, so that the potting glue fills the space enclosed by the bottom cover 120 and the top shell 110.

[0079] It is understandable that for connection methods not explicitly described in the text, common connection methods such as threaded connection, welding or bonding can be selected according to needs.

[0080] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker, characterized in that: include: Shell body (100); The base (200) is provided with two parts and is arranged one-to-one at the two ends of the shell body (100) along the first direction. The base (200) includes a fixing surface (201), and the fixing surface (201) is arranged to protrude from the bottom surface of the shell body (100) along the second direction; wherein the first direction and the second direction are perpendicular to each other.

2. The circuit breaker according to claim 1, characterized in that: The base (200) is provided with first base buckles (210) on both sides along the third direction, and the shell body (100) is provided with a clamping hole (111) corresponding to the first base buckle (210) one by one, and the first base buckle (210) is clamped with the clamping hole (111); wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The circuit breaker according to claim 2, characterized in that: A second base buckle (220) is provided on one side of the base (200) protruding from the shell body (100) along the first direction, and the second base buckle (220) is buckled with the top surface of the shell body (100) along the second direction.

4. The circuit breaker according to claim 3, characterized in that: The base (200) is provided with a base enclosure (230), and the first base buckle (210) and the second base buckle (220) are both provided on the base enclosure (230).

5. The circuit breaker according to claim 4, characterized in that: The base enclosure (230) comprises first side panels (231) arranged opposite to each other along the third direction; The shell body (100) is provided with a limiting groove (112) corresponding one-to-one to the first side plate (231), and the first side plate (231) is located in the limiting groove (112).

6. The circuit breaker according to claim 4, characterized in that: The base enclosure (230) comprises an end plate (232) protruding from the shell body (100) along the first direction, and two second base buckles (220) are spaced apart on the end plate (232) along the third direction.

7. The circuit breaker according to claim 1, characterized in that: A circuit board (300) and a wire pressing buckle (400) are arranged in the shell body (100); the circuit board (300) can be electrically connected to an external wire (500); and the wire pressing buckle (400) is used to seal a gap between the external wire (500) and the shell body (100).

8. The circuit breaker according to claim 7, characterized in that: The shell body (100) comprises a top shell (110), wherein the top shell (110) is provided with a mounting groove (113) and a positioning groove (114) connected to the mounting groove (113) along the second direction, wherein the circuit board (300) is arranged in the mounting groove (113), and the wire buckle (400) is arranged in the positioning groove (114).

9. The circuit breaker according to claim 8, characterized in that: The shell body (100) further comprises a bottom cover (120), wherein the bottom cover (120) is covered on the top shell (110) along the second direction, a bottom cover buckle (121) is provided on the bottom cover (120), a clamping groove (420) is provided on the wire pressing buckle (400), and the bottom cover buckle (121) is clamped with the clamping groove (420).

10. The circuit breaker according to claim 9, characterized in that: A plurality of heat dissipation slots (115) are provided at intervals on a side of the top shell (110) facing away from the bottom cover (120) along the second direction.

Images