Circuit breaker

Abstract

The utility model discloses a circuit breaker, and relates to the technical field of low-voltage electrical appliances, and the circuit breaker comprises a housing, a flash barrier, a bimetallic strip, and an adjusting part. The flash barrier is installed on the shell, the bimetallic strip is installed on the shell, the bimetallic strip is arranged on one side of the flash barrier, and the bimetallic strip and the flash barrier are arranged in a spaced mode. The adjusting piece is installed on the shell, the adjusting piece is connected with the bimetallic strip, and the adjusting piece can adjust the relative position of the bimetallic strip. The flash barrier is provided with a position indicating structure, the position indicating structure comprises at least one indicating mark, and the adjusting piece can adjust the bimetallic strip to the position matched with the indicating mark. According to the circuit breaker provided by the invention, the stability of a thermal protection function in the circuit breaker can be improved, so that the use safety of the circuit breaker is improved.

Description

Technical Field

[0001] This application relates to the technical field of low-voltage electrical appliances, and particularly relates to a circuit breaker. Background Art

[0002] In a miniature circuit breaker, a bimetal is a common thermal protection component. When an overload current passes through the circuit, the bimetal will be heated and bent, pushing the tripping mechanism in the circuit breaker to act, so that the circuit breaker trips to play a protective role.

[0003] In the design and manufacture of traditional circuit breaker products, the material of the bimetal can be selected according to parameters such as thermal conductivity, current-carrying performance, and deformation ability. After determining the material of the bimetal, the bimetal is installed in the circuit breaker to achieve the thermal protection function.

[0004] However, the bimetal in the circuit breaker is prone to abnormal operation due to inaccurate installation position, resulting in a decrease in the stability of the thermal protection performance and affecting the use safety of the circuit breaker. Summary of the Utility Model

[0005] The purpose of this application is to provide a circuit breaker, which can improve the stability of the thermal protection function in the circuit breaker, thereby improving the use safety of the circuit breaker.

[0006] In a first aspect, an embodiment of this application provides a circuit breaker, including a housing, an arc partition plate, a bimetal, and an adjusting member. The arc partition plate is installed in the housing, the bimetal is installed in the housing, the bimetal is arranged on one side of the arc partition plate, and the bimetal is spaced from the arc partition plate. The adjusting member is installed in the housing, the adjusting member is connected to the bimetal, and the adjusting member can adjust the relative position of the bimetal. The arc partition plate is provided with a position indicating structure, the position indicating structure includes at least one indicating mark, and the adjusting member can adjust the bimetal to a position adapted to the indicating mark.

[0007] Based on the above embodiment of this application, by providing a position indicating structure on the arc partition plate, installing the bimetal on one side of the arc partition plate and corresponding to the position indicating structure, on the one hand, it is convenient to adjust the position of the bimetal according to the position indicating structure by using the adjusting member, so that the bimetal is correspondingly installed at a preset position, effectively improving the accuracy of the thermal protection function. On the other hand, it can effectively prevent the arc from acting on the bimetal, enhance the protection of the bimetal, and thus avoid the problem of the circuit breaker thermal protection function failure caused by the bimetal being punctured by the arc, improving the stability of the thermal protection function.

[0008] In an optional embodiment, the position indicating structure includes a boss provided on the arc partition plate, the boss is located on the side of the arc partition plate close to the bimetal, the indicating mark is provided on the boss, and an avoidance groove is provided on the side of the bimetal close to the arc partition plate, and the avoidance groove is adapted to the boss.

[0009] Based on the above embodiments of the present application, by matching the boss in the position indicating structure with the avoidance groove provided on the bimetal sheet, the distance between the bimetal sheet and the indicating mark can be shortened, which is beneficial to improving the accuracy of the correspondence between the bimetal sheet and the indicating mark, thereby improving the accuracy of the thermal protection function.

[0010] In an alternative embodiment, at least two indicating marks are provided, and the at least two indicating marks are spaced apart.

[0011] Based on the above embodiments of the present application, at least two indicating marks can correspond to multiple installation positions of the bimetal sheet, which is convenient for determining the installation position of the bimetal sheet and for adjusting the installation position. At the same time, it can also be applicable to bimetal sheets of multiple specifications, so that bimetal sheets of multiple specifications can be accurately installed at the preset position.

[0012] In an alternative embodiment, the indicating mark is set as a scale line, and / or the indicating mark is set as a digital scale, and / or the indicating mark is set as an arrow scale.

[0013] Based on the above embodiments of the present application, the indicating mark is used to accurately indicate the position of the bimetal sheet. No matter what form the indicating mark is set, as long as there is a corresponding relationship with the bimetal sheet, it can play a role in indicating the position, which is beneficial to the accurate installation of the bimetal sheet, and further improves the reliability of the thermal protection provided by the bimetal sheet.

[0014] In an alternative embodiment, the bimetal sheet has a rotation axis for relative adjustment, and the indicating mark is set as a plurality of scale lines, and the plurality of scale lines are arranged in a circumferential pattern centered on the rotation axis.

[0015] Based on the above embodiments of the present application, the rotation axis of the bimetal sheet indicates that the bimetal sheet can rotate relative to the rotation axis to adjust the installation position. In this way, one end of the bimetal sheet can be fixed, and only the other end needs to be adjusted to adjust the bimetal sheet to the preset installation position, which simplifies the operation of adjusting the position.

[0016] In an alternative embodiment, the circuit breaker further includes an arc guiding plate. The arc guiding plate is partially connected to the arc separating plate. The arc guiding plate includes a connecting portion. The first end of the bimetal sheet is connected to the connecting portion, and the second end of the bimetal sheet corresponds to the position indicating structure

[0017] Based on the above embodiments of the present application, by connecting the first end of the bimetal sheet to the connecting portion, the installation position of the first end of the bimetal sheet can be restricted. By using the second end of the bimetal sheet to correspond to the position indicating structure, only the connecting portion needs to be adjusted to drive the first end of the bimetal sheet to change the position through the connecting portion, thereby adjusting the installation position of the entire bimetal sheet to make the second end of the bimetal sheet correspond to the indicating mark, which simplifies the operation of adjusting the position of the bimetal sheet and does not affect the thermal protection function of the bimetal sheet.

[0018] In an alternative embodiment, the circuit breaker further includes a shunt component and a contact component. The shunt component and the contact component are installed in the housing. The shunt component includes a wiring board, a first conductive member, and a second conductive member connected to the wiring board. The first conductive member is electrically connected to the contact component, the second conductive member is electrically connected to the bimetal strip, and the bimetal strip is electrically connected to the contact component.

[0019] Based on the above embodiments of the present application, the setting of the shunt component can reduce the current flowing through the bimetal strip, so as to select a more suitable bimetal strip, which is beneficial to improving the current-carrying capacity of the circuit breaker, reducing the temperature rise of the bimetal strip and the circuit breaker, and improving the stability of the thermal protection function.

[0020] In an alternative embodiment, a third conductive member is provided on the bimetal strip. The bimetal strip is electrically connected to the contact component through the third conductive member. The first end of the bimetal strip is electrically connected to the second conductive member, and the electrical connection position of the third conductive member and the bimetal strip is close to the second end of the bimetal strip.

[0021] Based on the above embodiments of the present application, the second conductive member is electrically connected to the first end of the bimetal strip, and the third conductive member is electrically connected to a position on the bimetal strip close to the second end of the bimetal strip. This can make the overload current flowing through the bimetal strip have a sufficient impact on the bimetal strip, so as to ensure that the bimetal strip can be bent and deformed to a preset angle, and further improve the reliability of the thermal protection function.

[0022] In an alternative embodiment, the wiring board includes a wiring section, a first conductive section, and a second conductive section spaced apart on the wiring section. The first conductive member is connected to the first conductive section, and the second conductive member is connected to the second conductive section.

[0023] Based on the above embodiments of the present application, the wiring section on the wiring board is used to connect to the current, the first conductive section and the second conductive section are used for current shunting. The first conductive section is bent relative to the wiring section in the direction of the contact component. The second conductive section is bent relative to the wiring section in the direction of the connection part, and the bending directions of the two relative to the wiring section are opposite. The setting of the first conductive section facilitates the electrical connection with the contact component through the first conductive member, and the setting of the second conductive section facilitates the electrical connection with the bimetal strip through the second conductive member.

[0024] In an alternative embodiment, a first positioning portion is provided on the first conductive section, and a first positioning groove adapted to the first positioning portion is provided on the housing, and / or a second positioning portion is provided on the second conductive section, and a second positioning groove adapted to the second positioning portion is provided on the housing.

[0025] Based on the above embodiments of the present application, the first conductive segment is fixed on the housing through the first positioning portion and the first positioning groove, and the second conductive segment is fixed on the housing through the second positioning portion and the second positioning groove. This cooperation form has the characteristics of simple structure and convenient assembly, which is beneficial to improving the electrical connection stability, thereby reducing the risk of failure of the shunt component and improving the use safety of the circuit breaker. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic diagram of the partial structure inside the circuit breaker provided by the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the cooperation structure between the bimetallic strip and the arc separating plate provided by the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the cooperation structure of various components inside the circuit breaker housing provided by the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the cooperation structure between the bimetallic strip and the position indicating structure provided by the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the corresponding structure between the bimetallic strip and the position indicating structure after installation provided by the embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of the shunt component provided by the embodiment of the present application.

[0033] Figure 7 It is a schematic diagram of the assembly structure between the wiring board and the housing provided by the embodiment of the present application.

[0034] Description of the Reference Numerals:

[0035] 1. Housing; 11. First positioning groove; 12. Second positioning groove; 2. Arc separating plate; 21. Position indicating structure; 211. Indication mark; 212. Boss; 3. Bimetallic strip; 31. Avoidance groove; 32. First end; 33. Second end; 34. Third conductive part; 4. Adjusting part; 5. Arc starting plate; 51. Connection part; 6. Shunt component; 61. Wiring board; 611. Wiring section; 612. First conductive section; 6121. First positioning part; 613. Second conductive section; 6131. Second positioning part; 62. First conductive part; 63. Second conductive part; 7. Contact component. Detailed implementation mode

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0038] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present application and simplifying the description, 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 therefore cannot be understood as a limitation to the present application. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] The thermal protection structure in the existing circuit breaker generally includes a bimetal strip. The bimetal strip is electrically connected to the internal circuit of the circuit breaker. When an overload current passes through the circuit, the bimetal strip will heat up and bend. When the bimetal strip bends to a preset angle, it can push the tripping mechanism in the circuit breaker to trip, so that the circuit breaker trips to play a role in thermal protection.

[0042] However, in the design and manufacture of the existing circuit breaker, the wiring board for accessing the current is directly electrically connected to the bimetal strip, and all the current accessed by the wiring board flows through the bimetal strip, making the current carried by the bimetal strip relatively large. In this case, it is easy to occur that the temperature rise of the bimetal strip is too high, and the overall temperature rise of the circuit breaker will also be relatively high, which is not conducive to the normal use of the circuit breaker. At the same time, inaccurate installation position of the bimetal strip will also lead to low reliability of the thermal protection function and affect the use safety of the circuit breaker.

[0043] Based on this, the embodiment of the present application provides a circuit breaker, which can improve the stability of the thermal protection function in the circuit breaker, thereby improving the use safety of the circuit breaker.

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0045] Please refer to Figures 1 to 3 , this embodiment provides a circuit breaker, which includes a housing 1, an arc partition plate 2, a bimetal strip 3 and an adjusting member 4. The arc partition plate 2 is installed in the housing 1, the bimetal strip 3 is installed in the housing 1, the bimetal strip 3 is arranged on one side of the arc partition plate 2, and the bimetal strip 3 is arranged at an interval from the arc partition plate 2. The adjusting member 4 is installed in the housing 1, the adjusting member 4 is connected to the bimetal strip 3, and the adjusting member 4 can adjust the relative position of the bimetal strip 3. A position indicating structure 21 is arranged on the arc partition plate 2, the position indicating structure 21 includes at least one indicating mark 211, and the adjusting member 4 can adjust the bimetal strip 3 to a position adapted to the indicating mark 211.

[0046] The housing 1 is the main body of the circuit breaker, and the arc isolation plate 2, the bimetallic strip 3 and the adjusting member 4 are all installed in the housing 1. The housing 1 can protect the aforementioned components and other components installed in the housing 1. Among them, the arc isolation plate 2 is used to block the arc to prevent the arc from damaging other components in the housing 1. The bimetallic strip 3 can carry the current connected to the circuit breaker, and when carrying the overload current for a long time, it will heat up and bend and deform to act on the tripping mechanism in the circuit breaker, and the circuit breaker will be disconnected through the tripping mechanism, thereby realizing the thermal protection function.

[0047] Reference Figure 1 and Figure 2 In the housing 1, the bimetallic strip 3 is arranged on one side of the arc isolation plate 2, specifically on the side of the arc isolation plate 2 away from the contact arc, so that the arc isolation function of the arc isolation plate 2 can be used to prevent the arc from moving to the bimetallic strip 3 and causing damage to the bimetallic strip 3, thereby ensuring the safety of the use of the bimetallic strip 3. In addition, the bimetallic strip 3 is spaced from the arc isolation plate 2, that is, there is a gap between the side of the bimetallic strip 3 close to the arc isolation plate 2 and the arc isolation plate 2, so that when the bimetallic strip 3 is bent and deformed, interference between the bimetallic strip 3 and the arc isolation plate 2 can be avoided, thereby reducing the impact on the thermal protection function.

[0048] Reference Figure 2 and Figure 3 The adjusting member 4 is used to adjust the position of the bimetal 3. After the bimetal 3 is assembled to the housing 1, the installation position of the bimetal 3 can be indirectly adjusted by adjusting the adjusting member 4, ensuring that the bimetal 3 can act on the tripping mechanism only when it is bent and deformed to a preset angle due to heat, avoiding premature or delayed disconnection of the circuit breaker due to inaccurate installation position, which is conducive to improving the accuracy of the thermal protection function.

[0049] Reference Figure 3 The position indicating structure 21 is arranged on the side of the arc isolation plate 2 close to the bimetallic strip 3, so that the bimetallic strip 3 corresponds to the position indicating structure 21. After the bimetallic strip 3 is assembled to the housing 1, the position of the bimetallic strip 3 corresponds to at least one indicating mark 211 in the position indicating structure 21, so that the installation position of the bimetallic strip 3 can be intuitively obtained.

[0050] If the installation position of the bimetallic strip 3 cannot accurately realize the thermal protection function, the position of the bimetallic strip 3 can be adjusted by the adjusting member 4 so that the bimetallic strip 3 accurately corresponds to the indication mark 211 of the preset position, so that the tripping mechanism can be driven to trip after the bimetallic strip 3 is bent and deformed to a preset angle.

[0051] Among them, the preset position is the installation position where the bimetal sheet 3 can accurately achieve overheat protection. Installing the bimetal sheet 3 at this position can avoid premature disconnection or delayed disconnection. The preset angle is the bending angle at which the bimetal sheet 3 can accurately achieve overheat protection. The bimetal sheet 3 heats up and bends and deforms to the preset angle at the preset position to disconnect the circuit breaker, which is also used to prevent premature disconnection or delayed disconnection.

[0052] Based on the above embodiments of the present application, by providing a position indicating structure 21 on the arc partition plate 2 and installing the bimetal sheet 3 on one side of the arc partition plate 2 corresponding to the position indicating structure 21, on the one hand, it is convenient to adjust the position of the bimetal sheet 3 according to the position indicating structure 21 by using the adjusting member 4, so that the bimetal sheet 3 is correspondingly installed at the preset position, effectively improving the accuracy of the thermal protection function.

[0053] On the other hand, it can effectively prevent the arc from acting on the bimetal sheet 3, enhance the protection of the bimetal sheet 3, thereby avoiding the problem of the thermal protection function of the circuit breaker failing due to the bimetal sheet 3 being punctured by the arc, and improving the stability of the thermal protection function.

[0054] Referring to Figure 4 , in some examples, the position indicating structure 21 includes a boss 212 provided on the arc partition plate 2. The boss 212 is located on the side of the arc partition plate 2 close to the bimetal sheet 3, and an indication mark 211 is provided on the boss 212. An avoidance groove 31 is provided on the side of the bimetal sheet 3 close to the arc partition plate 2, and the avoidance groove 31 is adapted to the boss 212.

[0055] Based on the above embodiments of the present application, by the cooperation of the boss 212 in the position indicating structure 21 and the avoidance groove 31 provided on the bimetal sheet 3, the distance between the bimetal sheet 3 and the indication mark 211 can be shortened, which is beneficial to improving the accuracy of the correspondence between the bimetal sheet 3 and the indication mark 211, thereby improving the accuracy of the thermal protection function.

[0056] Specifically, referring to Figure 4 , the boss 212 in the position indicating structure 21 is provided on the side wall of the arc partition plate 2 close to the bimetal sheet 3, the boss 212 protrudes towards the direction where the bimetal sheet 3 is located, and the indication mark 211 in the position indicating structure 21 is provided on the top surface of the boss 212. The bimetal sheet 3 is relatively perpendicular to the plane where the boss 212 is located, and the avoidance groove 31 is provided on the side of the bimetal sheet 3 close to the arc partition plate 2.

[0057] Among them, the depth of the avoidance groove 31 matches the height of the boss 212. After the bimetal sheet 3 and the arc separating plate 2 are assembled onto the housing 1, the boss 212 is correspondingly located within the avoidance groove 31. The avoidance groove 31 can both avoid the boss 212 to prevent interference between the bimetal sheet 3 and the boss 212, and can also shorten the distance between the indication mark 211 and the bimetal sheet 3, making the correspondence between the bimetal sheet 3 and the indication mark 211 more accurate.

[0058] In addition, the boss 212 can play a limiting role for the bimetal sheet 3. During the assembly process, the avoidance groove 31 of the bimetal sheet 3 can limit the installation position of the bimetal sheet 3 under the cooperation of the boss 212, enabling the bimetal sheet 3 to first correspond to the position indication structure 21 during the assembly process and then fix the position of the bimetal sheet 3. In this way, after the assembly is completed, the correspondence between the bimetal sheet 3 and the indication mark 211 can be adjusted only through the adjusting member 4, which is convenient and fast.

[0059] Referring to Figure 5 , in some examples, at least two indication marks 211 are provided, and the at least two indication marks 211 are spaced apart.

[0060] Based on the above embodiments of the present application, the at least two indication marks 211 can correspond to multiple installation positions of the bimetal sheet 3, facilitating the determination of the installation position of the bimetal sheet 3 and facilitating the adjustment of the installation position. At the same time, it can also be applicable to bimetal sheets 3 of multiple specifications, so that bimetal sheets 3 of multiple specifications can be accurately installed at the preset positions.

[0061] When two indication marks 211 are provided, the bimetal sheet 3 can correspond to one of the indication marks 211, or can also be installed between the two spaced-apart indication marks 211, and the installation position of the bimetal sheet 3 is indicated by the two spaced-apart indication marks 211 simultaneously.

[0062] Referring to Figure 5 , when more than two indication marks 211 are provided, the multiple indication marks 211 are spaced apart on the top surface of the boss 212. The setting of the multiple indication marks 211 can more finely indicate multiple positions, which is beneficial to improving the installation accuracy of the bimetal sheet 3. If the specification of the bimetal sheet 3 is changed, the corresponding indication mark 211 can also be selected according to the nature of the replaced bimetal sheet 3, and the applicable range is wider.

[0063] Among them, the indication mark 211 can be provided in various forms.

[0064] Exemplarily, the indication mark 211 is set as a scale line. Multiple scale lines are spaced apart on the surface of the boss 212. After the bimetal sheet 3 and the arc baffle are assembled, the side wall of the bimetal sheet 3 is perpendicular to the surface of the boss 212, and the side wall of the bimetal sheet 3 can be aligned with the scale line on the boss 212, thereby indicating the position of the bimetal sheet 3.

[0065] Exemplarily, the indicating mark 211 is set as a digital scale. Similar to the foregoing example, at least two digital scale intervals are arranged on the surface of the boss 212. After the bimetal sheet 3 and the arc shielding plate are assembled, the boss 212 is correspondingly located in the avoidance groove 31, and the bottom of the avoidance groove 31 can block the digital scale at the corresponding position, so as to indicate the position of the bimetal sheet 3.

[0066] Exemplarily, the indicating mark 211 is set as an arrow scale. Similar to the scale line, the side wall of the bimetal sheet 3 can be aligned with the vertex of the arrow in the arrow scale, so as to indicate the position of the bimetal sheet 3.

[0067] Based on the above embodiments of the present application, the indicating mark 211 is used to accurately indicate the position of the bimetal sheet 3. No matter what form the indicating mark 211 is set, as long as there is a corresponding relationship with the bimetal sheet 3, it can play a role in indicating the position, which is beneficial to the accurate installation of the bimetal sheet 3, and further improves the reliability of the thermal protection provided by the bimetal sheet 3.

[0068] Referring to Figure 5 , in some examples, the bimetal sheet 3 has a rotation axis for relative adjustment, and the indicating mark 211 is set as a plurality of scale lines, and the plurality of scale lines are arranged in a circumferential pattern centered on the rotation axis.

[0069] Based on the above embodiments of the present application, the rotation axis of the bimetal sheet 3 indicates that the bimetal sheet 3 can rotate and adjust the installation position relative to the rotation axis. In this way, one end of the bimetal sheet 3 can be fixed, and only the other end needs to be adjusted to adjust the bimetal sheet 3 to the preset installation position, which simplifies the operation of adjusting the position.

[0070] Specifically, the indicating mark 211 is set as a plurality of scale lines, and the plurality of scale lines are arranged at intervals and distributed in a circumferential pattern relative to the rotation axis of the bimetal sheet 3. Such a setting facilitates the bimetal sheet 3 to accurately correspond to the indicating mark 211 during the process of rotating and adjusting the position around the rotation axis, simplifies the adjustment operation, facilitates the realization of precise adjustment, and is beneficial to improving the installation accuracy of the bimetal sheet 3.

[0071] Referring to Figures 3 to 5 , in some examples, the circuit breaker further includes an arc guiding plate 5, the arc guiding plate 5 is partially connected to the arc shielding plate 2, the arc guiding plate 5 includes a connecting portion 51, the first end 32 of the bimetal sheet 3 is connected to the connecting portion 51, and the second end 33 of the bimetal sheet 3 corresponds to the position indicating structure 21.

[0072] Referring to Figure 4As a component for arc striking in the circuit breaker, the arc striking plate 5 can cooperate with the arc isolating plate 2 to block and guide the arc. In the embodiment of the present application, the arc striking plate 5 is partially connected to the arc isolating plate 2, and the rest of the arc striking plate 5 extends away from the arc isolating plate 2. The connecting portion 51 on the arc striking plate 5 is located away from the arc isolating plate 2, the first end 32 of the bimetallic strip 3 is connected to the connecting portion 51, and the second end 33 of the bimetallic strip 3 is close to the position indicating structure 21 on the arc isolating plate 2.

[0073] Based on the above-mentioned embodiments of the present application, by connecting the first end 32 of the bimetallic strip 3 to the connecting portion 51, the installation position of the first end 32 of the bimetallic strip 3 can be limited, and the second end 33 of the bimetallic strip 3 corresponds to the position indicating structure 21. In this way, it is only necessary to adjust the connecting portion 51 to drive the first end 32 of the bimetallic strip 3 to change its position through the connecting portion 51, thereby adjusting the installation position of the entire bimetallic strip 3 so that the second end 33 of the bimetallic strip 3 corresponds to the indicating mark 211, which simplifies the operation of adjusting the position of the bimetallic strip 3 and does not affect the thermal protection function of the bimetallic strip 3.

[0074] Among them, refer to Figure 3 and Figure 4 The arc-striking plate 5 is connected to the side of the arc-isolating plate 2 facing away from the bimetallic strip 3, the connecting portion 51 is located at the portion where the arc-striking plate 5 extends out of the arc-isolating plate 2, and the connecting portion 51 of the arc-striking plate 5 extends in a direction away from the arc-isolating plate 2 and extends to the side of the arc-isolating plate 2 close to the bimetallic strip 3.

[0075] Reference Figure 5 The first end 32 of the bimetallic strip 3 is connected to the connecting portion 51 , and the second end 33 of the bimetallic strip 3 is close to the position indicating structure 21 on the arc isolation plate 2 , and corresponds to the indicating mark 211 in the position indicating structure 21 to indicate the position of the bimetallic strip 3 .

[0076] Reference Figure 5 The adjusting member 4 is arranged in a position close to the connecting portion 51 in the shell 1. The operating adjusting member 4 can abut and push the connecting portion 51 to change the position of the connecting portion 51, thereby driving the first end 32 of the bimetallic strip 3 through the connecting portion 51. The position of the first end 32 of the bimetallic strip 3 can be changed to change the overall position of the bimetallic strip 3. Assembling and adjusting the bimetallic strip 3 in this form is convenient for installation and position adjustment.

[0077] The adjusting member 4 is usually configured as an adjusting screw, which is a prior art and will not be described in detail herein.

[0078] Reference Figure 6, in some examples, the circuit breaker further includes a shunt component 6 and a contact component 7. The shunt component 6 and the contact component 7 are installed on the housing 1. The shunt component 6 includes a wiring board 61, a first conductive member 62 and a second conductive member 63 connected to the wiring board 61. The first conductive member 62 is electrically connected to the contact component 7, the second conductive member 63 is electrically connected to the bimetal 3, and the bimetal 3 is electrically connected to the contact component 7.

[0079] The contact component 7 generally includes a moving contact and a static contact. The moving contact is electrically connected to the incoming line end of the circuit breaker, and the static contact is electrically connected to the outgoing line end of the circuit breaker. When an overload current passes through the circuit breaker, the bimetal 3 can act on the tripping mechanism to trip the tripping mechanism, and then the moving contact and the static contact are separated through the tripping mechanism to achieve the disconnection of the circuit breaker.

[0080] Refer to Figure 6 , the shunt component 6 is used to shunt the current accessing the circuit breaker. A part of the current flows from the wiring board 61 through the bimetal 3 and then accesses the moving contact of the contact component 7, and another part of the current directly accesses the moving contact of the contact component 7 from the wiring board 61.

[0081] Based on the above embodiments of the present application, the setting of the shunt component 6 can reduce the current flowing through the bimetal 3, so as to select a more suitable bimetal 3, which is beneficial to improving the current-carrying capacity of the circuit breaker, reducing the temperature rise of the bimetal 3 and the circuit breaker, and improving the stability of the thermal protection function.

[0082] Specifically, refer to Figure 6 , the wiring board 61 in the shunt component 6 is electrically connected to the moving contact in the contact component 7 through the first conductive member 62 to form a first shunt path. The wiring board 61 is electrically connected to the bimetal 3 through the second conductive member 63, and the bimetal 3 is electrically connected to the moving contact in the contact component 7 to form a second shunt path. The first shunt path and the second shunt path can divide the current accessed by the wiring board 61 into two parts. Compared with the form in which the wiring board 61 in the existing circuit breaker is separately electrically connected to the bimetal 3, the current flowing through the bimetal 3 in this embodiment is reduced, and the temperature rise of the bimetal 3 when bearing the overload current is reduced, which is beneficial to improving the use safety of the circuit breaker.

[0083] Refer to Figure 6 , in some examples, a third conductive member 34 is provided on the bimetal 3. The bimetal 3 is electrically connected to the contact component 7 through the third conductive member 34. The first end 32 of the bimetal 3 is electrically connected to the second conductive member 63, and the electrical connection position of the third conductive member 34 and the bimetal 3 is close to the second end 33 of the bimetal 3.

[0084] Based on the above embodiments of the present application, the second conductive member 63 is electrically connected to the first end 32 of the bimetal 3, and the third conductive member 34 is electrically connected to a position on the bimetal 3 near the second end 33 of the bimetal 3. In this way, the overload current flowing through the bimetal 3 can have a sufficient impact on the bimetal 3, ensuring that the bimetal 3 can be bent and deformed to a preset angle, further improving the reliability of the thermal protection function.

[0085] Referring to Figure 6 and Figure 7 , in some examples, the wiring board 61 includes a wiring section 611, and a first conductive section 612 and a second conductive section 613 that are spaced apart on the wiring section 611. The first conductive member 62 is connected to the first conductive section 612, and the second conductive member 63 is connected to the second conductive section 613.

[0086] Based on the above embodiments of the present application, the wiring section 611 on the wiring board 61 is used to access current, the first conductive section 612 and the second conductive section 613 are used for current shunting. The first conductive section 612 is bent relative to the wiring section 611 in the direction of the contact assembly 7. The second conductive section 613 is bent relative to the wiring section 611 in the direction of the connecting portion 51, and the bending directions of the two relative to the wiring section 611 are opposite. The setting of the first conductive section 612 facilitates electrical connection with the contact assembly 7 through the first conductive member 62, and the setting of the second conductive section 613 facilitates electrical connection with the bimetal 3 through the second conductive member 63.

[0087] Referring to Figure 7 , in some examples, a first positioning portion 6121 is provided on the first conductive section 612, and a first positioning groove 11 adapted to the first positioning portion 6121 is provided on the housing 1. A second positioning portion 6131 is provided on the second conductive section 613, and a second positioning groove 12 adapted to the second positioning portion 6131 is provided on the housing 1.

[0088] Based on the above embodiments of the present application, the first conductive section 612 is fixed to the housing 1 through the first positioning portion 6121 and the first positioning groove 11, and the second conductive section 613 is fixed to the housing 1 through the second positioning portion 6131 and the second positioning groove 12. This cooperation form has the characteristics of simple structure and convenient assembly, which is beneficial to improving the electrical connection stability, thereby reducing the risk of failure of the shunting assembly 6 and improving the use safety of the circuit breaker.

[0089] The first positioning portion 6121 is disposed on the side of the first conductive segment 612 close to the housing 1. The first positioning portion 6121 is configured as a positioning protrusion. The first positioning groove 11 is disposed on the housing 1 at a position corresponding to the first positioning portion 6121. The positioning protrusion can be correspondingly inserted into the first positioning groove 11 to achieve a positioning effect. Similarly, the second positioning portion 6131 is disposed on the side of the second conductive segment 613 close to the housing 1. The second positioning portion 6131 is also configured as a positioning protrusion. The second positioning groove 12 is disposed on the housing 1 at a position corresponding to the second positioning portion 6131. The positioning protrusion of the second positioning portion 6131 can be correspondingly inserted into the second positioning groove 12 to achieve a positioning effect on the second conductive segment 613.

[0090] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker, characterized in that, It includes a housing, an arc separating plate, a bimetallic strip and an adjusting member; The arc separating plate is installed on the housing, the bimetallic strip is installed on the housing, the bimetallic strip is arranged on one side of the arc separating plate, and the bimetallic strip is arranged at an interval from the arc separating plate; The adjusting member is installed on the housing, the adjusting member is connected to the bimetallic strip, and the adjusting member can adjust the relative position of the bimetallic strip; A position indicating structure is arranged on the arc separating plate, the position indicating structure includes at least one indicating mark, and the adjusting member can adjust the bimetallic strip to a position adapted to the indicating mark.

2. The circuit breaker according to claim 1, wherein, The position indicating structure includes a boss arranged on the arc separating plate, the boss is located on the side of the arc separating plate close to the bimetallic strip, the indicating mark is arranged on the boss, and an avoidance groove is arranged on the side of the bimetallic strip close to the arc separating plate, and the avoidance groove is adapted to the boss.

3. The circuit breaker according to claim 2, characterized in that, At least two indicating marks are arranged, and at least two of the indicating marks are arranged at intervals.

4. The circuit breaker according to claim 3, characterized in that, The indicating mark is set as a scale line, and / or, the indicating mark is set as a digital scale, and / or, the indicating mark is set as an arrow scale.

5. The circuit breaker according to claim 3, characterized in that, The bimetallic strip has a rotation axis for relative adjustment, and the indicating mark is set as a plurality of scale lines, and the plurality of scale lines are arranged in a circumferential manner with the rotation axis as the center.

6. The circuit breaker according to any one of claims 1-5, characterized in that, The circuit breaker further includes an arcing plate, a part of the arcing plate is connected to the arc separating plate, the arcing plate includes a connecting portion, the first end of the bimetallic strip is connected to the connecting portion, and the second end of the bimetallic strip corresponds to the position indicating structure.

7. The circuit breaker according to any one of claims 1-5, characterized in that, The circuit breaker further includes a current dividing assembly and a contact assembly, the current dividing assembly and the contact assembly are installed on the housing, the current dividing assembly includes a wiring board and a first conductive member and a second conductive member connected to the wiring board, the first conductive member is electrically connected to the contact assembly, the second conductive member is electrically connected to the bimetallic strip, and the bimetallic strip is electrically connected to the contact assembly.

8. The circuit breaker according to claim 7, characterized in that, A third conductive member is arranged on the bimetallic strip, the bimetallic strip is electrically connected to the contact assembly through the third conductive member, the first end of the bimetallic strip is electrically connected to the second conductive member, and the electrical connection position of the third conductive member and the bimetallic strip is close to the second end of the bimetallic strip.

9. The circuit breaker according to claim 7, characterized in that, The wiring board includes a wiring section and a first conductive section and a second conductive section arranged at intervals on the wiring section, the first conductive member is connected to the first conductive section, and the second conductive member is connected to the second conductive section.

10. The circuit breaker according to claim 9, characterized in that, A first positioning portion is arranged on the first conductive section, and a first positioning groove adapted to the first positioning portion is arranged on the housing; and / or, a second positioning portion is arranged on the second conductive section, and a second positioning groove adapted to the second positioning portion is arranged on the housing.

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