Circuit breaker

Abstract

A circuit breaker relates to the field of low-voltage electrical technology. The circuit breaker provided by the utility model comprises a shell, and a shunt, an operating mechanism, a moving contact group and a static contact which are arranged in the shell, the shell is provided with a wire inlet end, the wire inlet end is arranged at one end of the circuit breaker in the length direction of the circuit breaker, the other end of the circuit breaker is provided with a wire outlet end and a button, one end of the diverter is connected with the wire inlet end, the other end of the diverter is connected with the moving contact set through a plurality of flexible connections, and the static contact and the moving contact set are oppositely arranged. The moving contact group comprises a plurality of moving contacts which are arranged side by side; the static contact is connected with the wire outlet end; and the operating mechanism can drive the moving contact group to be in contact with the static contact for closing. According to the circuit breaker, the heat dissipation capability of the circuit breaker can be improved, and the use safety and reliability of the circuit breaker are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical technology field, specifically, relate to a circuit breaker. BACKGROUND

[0002] With the continuous acceleration of city modernization process, people's living standard and living level are continuously improved, and there is a higher demand for power safety, and the application of DC circuit breaker in life is more and more widely.

[0003] The existing 1U circuit breaker has only one contact, and the number of soft connections of the shunt in the circuit breaker is small, which cannot meet the current use demand. If it is applied to a large current environment, the poor heat dissipation capacity of the circuit breaker can cause the moving contact and other parts to overheat and stick to the shell, reducing the use safety. INVENTION CONTENTS

[0004] The utility model discloses a circuit breaker, which can improve the heat dissipation capacity of the circuit breaker and ensure the use safety and reliability of the circuit breaker.

[0005] The embodiment of the utility model is realized as follows:

[0006] In one aspect of the utility model, a circuit breaker is provided, which comprises a shell, a shunt, an operating mechanism, a moving contact group and a static contact arranged in the shell. The shell has a wire inlet end arranged at one end of the circuit breaker along the length direction of the circuit breaker, a wire outlet end and a button arranged at the other end of the circuit breaker, one end of the shunt connected to the wire inlet end, and the other end connected to the moving contact group through multiple soft connections. The static contact is arranged opposite to the moving contact group, and the moving contact group comprises multiple moving contacts arranged side by side. The static contact is connected to the wire outlet end. The operating mechanism can drive the moving contact group and the static contact to contact and close.

[0007] Optionally, the shunt comprises a body and connecting parts arranged on opposite sides of the body respectively. The connecting part on the side of the body close to the moving contact group is connected to the contact plate of one of the moving contacts through a first soft connection and a second soft connection. One end of the first soft connection and one end of the second soft connection are arranged side by side on the top surface of the connecting part. The other end of the first soft connection and the other end of the second soft connection are connected to one of the contact plates.

[0008] Optionally, an arc extinguishing chamber is arranged between the shunt and the moving contact group. The arc extinguishing chamber is provided with arc plates on opposite sides along the height direction of the circuit breaker. The connecting part on the side of the body close to the moving contact group is connected to the contact plate of another moving contact of the moving contact group through a third soft connection and connected to the arc plate through a fourth soft connection. One end of the third soft connection is connected to the bottom surface of the connecting part, and the other end is connected to the side of the contact plate away from the first soft connection. One end of the fourth soft connection is connected to the bottom surface of the connecting part, and the other end is connected to the bottom surface of the arc plate.

[0009] Optionally, the incoming line end is provided with a plug-in board, and the connecting part near the incoming line end side of the shunt is welded with the plug-in board.

[0010] Optionally, the shell is provided with a limiting rod extending along the width direction of the circuit breaker, the limiting rod is arranged on the side of the movable contact group away from the static contact and at the top of the movable contact group, and the movable contact group is capable of abutting against the limiting rod when moving away from the static contact.

[0011] Optionally, the circuit breaker further comprises a double-gold assembly, the double-gold assembly comprises a double-gold traction rod and a double-gold plate connected with each other, the double-gold plate is arranged on the arc striking plate, one end of the double-gold traction rod is connected with the movable contact group, the other end of the double-gold traction rod abuts against the double-gold plate, the limiting rod is arranged on one side of the double-gold traction rod, and the double-gold assembly is capable of driving the double-gold traction rod to move and abut against the limiting rod when heated, so as to drive the movable contact group to move away from the static contact.

[0012] Optionally, the movable contact group further comprises a contact support, the operating mechanism comprises a lock catch, the side of the lock catch facing the movable contact group is provided with a receiving cavity, and the contact support is arranged in the receiving cavity; the shell is provided with a mounting rod arranged along the width direction of the circuit breaker, the mounting rod is sequentially arranged through the lock catch and the contact support, so that the lock catch is hinged with the shell; the contact support comprises a receiving cavity arranged along the width direction of the circuit breaker, and a plurality of movable contacts are arranged side by side in the receiving cavity to be connected with the contact support.

[0013] Optionally, the lock catch is provided with a driving groove, one end of the double-gold traction rod is arranged in the driving groove, and the other end of the double-gold traction rod abuts against the double-gold plate; the double-gold traction rod is capable of driving the lock catch to rotate through the driving groove when heated.

[0014] Optionally, the top of the double-gold plate abuts against a fifth flexible connection, and the other end of the fifth flexible connection is connected with the side of the contact plate away from the first flexible connection.

[0015] Optionally, the operating mechanism further comprises a jump catch, the jump catch is clamped on the end of the lock catch; one end of the movable contact close to the operating mechanism is provided with a first mounting hole, and the first mounting holes of the adjacent two movable contacts are connected through a connecting shaft; the circuit breaker further comprises a reset tension spring, one end of the reset tension spring is fixedly connected with the shell, and the other end of the reset tension spring is connected with the connecting shaft, so as to provide a reset force for the operating mechanism; after the lock catch and the jump catch are unlocked, the reset tension spring drives the movable contact to move away from the static contact.

[0016] Optionally, the operating mechanism comprises a driven part and a pull rod, the driven part is connected with the shell; one end of the contact support close to the operating mechanism is provided with a second mounting hole, one end of the pull rod is connected with the driven part, and the other end of the pull rod is connected with the contact support through the second mounting hole; the driven part is capable of driving the contact support to move through the pull rod, so that the movable contact is in contact with the static contact to close the circuit breaker.

[0017] The utility model discloses beneficial effect includes:

[0018] The application provides a circuit breaker, including the shell and the shunt, operating mechanism, movable contact group and static contact that set up in the shell, the shell has the incoming line end, and the incoming line end is along the length direction of circuit breaker and is arranged at one end of circuit breaker, and the outgoing line end and button are arranged at the other end of circuit breaker, one end of shunt is connected with the incoming line end, and the other end is connected with movable contact group through a plurality of soft connections, through the setting of a plurality of soft connections, the current shunt effect can be improved, the connection area of shunt and movable contact group is prevented from overheating, and the heat dissipation effect of circuit breaker is improved, static contact is opposite to movable contact group, movable contact group includes a plurality of side -by -side movable contacts, and the setting of a plurality of movable contacts can improve the heat dissipation effect when circuit breaker closes, static contact is connected with outgoing line end, and operating mechanism can drive movable contact group and static contact contact and close. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawing needed to be used in the embodiment, should understand, the following drawing only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0020] Figure 1 The utility model provides a circuit breaker's structural schematic diagram one for embodiment of the utility model;

[0021] Figure 2 The utility model provides a circuit breaker's structural schematic diagram two for embodiment of the utility model;

[0022] Figure 3 The utility model provides a circuit breaker's structural schematic diagram three for embodiment of the utility model;

[0023] Figure 4 The utility model provides a circuit breaker's structural schematic diagram four for embodiment of the utility model;

[0024] Figure 5 It is the detail enlarged view for A place;

[0025] Figure 6 The utility model provides a circuit breaker's structural schematic diagram five for embodiment of the utility model.

[0026] Icon: 100 - circuit breaker; 110 - housing; 111 - incoming line end; 1111 - plug-in board; 112 - outgoing line end; 113 - mounting rod; 114 - limiting rod; 120 - shunt; 121 - body; 122 - connecting part; 130 - operating mechanism; 131 - driven part; 132 - pull rod; 133 - lock catch; 1331 - driving groove; 134 - trip catch; 140 - movable contact group; 141 - movable contact; 142 - contact support; 143 - connecting shaft; 150 - fixed contact; 161 - first flexible connection; 162 - second flexible connection; 163 - third flexible connection; 164 - fourth flexible connection; 165 - fifth flexible connection; 170 - arc extinguishing chamber; 171 - arc striking plate; 180 - double gold assembly; 181 - double gold pulling rod; 182 - double gold plate; 190 - reset tension spring; a - width direction; b - height direction; c - length direction. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the 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 described and shown in the drawings can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0029] It should be noted that: similar reference numerals and letters represent 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.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "set", "install", "connect" and "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0033] Please refer to Figure 1 The embodiment provides a circuit breaker 100, which comprises a shell 110, a shunt 120, an operating mechanism 130, a moving contact group 140 and a static contact 150 arranged in the shell 110; the shell 110 has a line-in end 111 arranged at one end of the circuit breaker 100 along the length direction c of the circuit breaker 100, a line-out end 112 and a button arranged at the other end of the circuit breaker 100, one end of the shunt 120 is connected with the line-in end 111, and the other end is connected with the moving contact group 140 through a plurality of flexible connections, the static contact 150 is arranged opposite to the moving contact group 140, and the moving contact group 140 comprises a plurality of moving contacts 141 arranged side by side; the static contact 150 is connected with the line-out end 112; the operating mechanism 130 can drive the moving contact group 140 to contact and close the static contact 150.

[0034] Specifically, the application provides a circuit breaker 100, as shown in Figure 1 The shell 110 is provided with a static contact 150, a moving contact group 140 capable of contacting or separating from the static contact 150, and an operating mechanism 130 in the shell 110 for driving the moving contact group 140 to move close to or away from the static contact 150; the shell 110 is also provided with a shunt 120, one end of the shunt 120 is connected with the line-in end 111 of the circuit breaker 100, and the shunt 120 is used for distributing input current;

[0035] The moving contact group 140 comprises a plurality of moving contacts 141 arranged side by side, and the moving contact 141 is relatively thin in order to improve the heat dissipation effect of the circuit breaker 100 as much as possible, as shown in Figure 6As shown, in an embodiment of the present application, the movable contact group 140 includes two movable contacts 141, which are arranged side by side and move synchronously to contact or separate from the static contact 150. Compared with the existing circuit breaker in which only a single movable contact is arranged, the present application can minimize the heat dissipation effect when the movable contact group 140 and the static contact 150 are closed, thereby improving the use safety of the circuit breaker 100.

[0036] One end of the shunt 120 is connected with the incoming line end 111, and the other end of the shunt 120 is connected with the movable contact group 140 through a plurality of flexible connections. Through the arrangement of the plurality of flexible connections, the current distribution effect can be further improved, and the overheating of the connection area between the shunt 120 and the movable contact group 140 is avoided, thereby improving the heat dissipation effect of the circuit breaker 100.

[0037] When the operating mechanism 130 drives the movable contact group 140 to contact and close the static contact 150, the incoming line end 111 and the outgoing line end 112 form an electrical circuit. Through the arrangement of the plurality of movable contacts 141 and the plurality of flexible connections, the heat dissipation effect inside the circuit breaker 100 can be effectively improved, so that the use of the circuit breaker 100 is more safe and reliable.

[0038] It should be noted that, in an embodiment of the present application, first, as shown, Figure 3 The shunt 120 includes a body 121 and a connection portion 122 arranged on each of the opposite sides of the body 121. The connection portion 122 on the side of the body 121 close to the movable contact group 140 is connected with the contact plate of one of the movable contacts 141 through a first flexible connection 161 and a second flexible connection 162. One end of the first flexible connection 161 and one end of the second flexible connection 162 are arranged side by side on the top surface of the connection portion 122. The other end of the first flexible connection 161 and the other end of the second flexible connection 162 are connected with the contact plate.

[0039] Specifically, the body 121 of the shunt 120 is used to realize the current distribution or measurement function. The opposite sides of the body 121 are respectively provided with the connection portion 122, through which the body 121 can be connected with the movable contact group 140 and the incoming line end 111. Optionally, the number of the connection portion 122 on the side of the shunt 120 close to the incoming line end 111 corresponds to the number of the plug-in boards 1111 arranged on the incoming line end 111. As shown, Figure 3 In an embodiment of the present application, the side of the body 121 close to the operating mechanism 130 is provided with one connection portion 122, and the side of the body 121 close to the incoming line end 111 is provided with two connection portions 122. Correspondingly, the incoming line end 111 is provided with two plug-in boards 1111, and the connection portion 122 on the side of the shunt 120 close to the incoming line end 111 is welded with the plug-in board 1111, so as to improve the connection stability of the internal structure of the circuit breaker 100.

[0040] As shown in Figure 3 , the connecting part 122 of the body 121 close to the moving contact group 140 is connected with the contact plate of one of the moving contacts 141 through the first soft connection 161 and the second soft connection 162. By setting the soft connection, the connection failure problem caused by the deformation or displacement of the components in the long-term operation due to rigid connection is effectively avoided. At the same time, by setting multiple soft connections, the heat dissipation effect inside the circuit breaker 100 is effectively improved, so that the use of the circuit breaker 100 is more secure, and the current path is always smooth, improving the reliability of the circuit breaker 100.

[0041] Secondly, as shown in Figure 2 , the shunt 120 and the moving contact group 140 are also provided with an arc extinguishing chamber 170, and the arc extinguishing chamber 170 is provided with arc guiding plates 171 on opposite sides along the height direction b of the circuit breaker 100. Figure 4 As shown in , the connecting part 122 of the body 121 close to the moving contact group 140 is connected with the contact plate of the other moving contact 141 of the moving contact group 140 through the third soft connection 163, and connected with the arc guiding plate 171 through the fourth soft connection 164. One end of the third soft connection 163 is connected with the bottom surface of the connecting part 122, and the other end is connected with the surface of the contact plate away from the first soft connection 161. One end of the fourth soft connection 164 is connected with the bottom surface of the connecting part 122, and the other end is connected with the bottom surface of the arc guiding plate 171.

[0042] Specifically, please refer to Figure 1 and Figure 2 , the arc chamber is provided with arc guiding plates 171 on opposite sides along the height direction b of the circuit breaker 100, so that the moving contact 141 and the static contact 150, and the moving contact group 140 and the shunt 120 have arc guiding plates 171. The arc guiding plates 171 are mainly used to guide the electric arc into the arc extinguishing chamber 170.

[0043] As shown in Figure 4 , the connecting part 122 of the body 121 close to the moving contact group 140 is connected with the contact plate of the other moving contact 141 of the moving contact group 140 through the third soft connection 163, and connected with the arc guiding plate 171 through the fourth soft connection 164. Such a connection mode can take advantage of the structural features of the connecting part 122 to achieve stable connection, and is coordinated with the first soft connection 161 and the second soft connection 162 in terms of spatial layout, avoiding confusion and interference of the connection lines. The third soft connection 163 is connected with the surface of the contact plate away from the first soft connection 161, so that the current can be uniformly distributed on the contact plate. By supplying power to the contact plate from different directions through multiple soft connections, the current-carrying capacity and current distribution uniformity of the contact plate are improved.

[0044] The fourth soft connection 164 can provide stable current supply for the arc striking plate 171 or play a role in adjusting the current distribution, thereby enhancing the guiding and control capabilities of the arc striking plate 171 on the arc, and improving the efficiency and reliability of the entire arc extinguishing system.

[0045] The circuit breaker 100 provided in the application comprises a shell 110, a shunt 120, an operating mechanism 130, a movable contact group 140 and a static contact 150 arranged in the shell 110. The shell 110 has a line inlet end 111 arranged at one end of the circuit breaker 100 along the length direction c of the circuit breaker 100, and a line outlet end 112 and a button arranged at the other end of the circuit breaker 100. One end of the shunt 120 is connected with the line inlet end 111, and the other end is connected with the movable contact group 140 through a plurality of soft connections. The arrangement of the plurality of soft connections can improve the current shunting effect, avoid overheating of the connection area between the shunt 120 and the movable contact group 140, and improve the heat dissipation effect of the circuit breaker 100. The static contact 150 is arranged opposite to the movable contact group 140. The movable contact group 140 comprises a plurality of movable contacts 141 arranged side by side. The arrangement of the plurality of movable contacts 141 can improve the heat dissipation effect of the circuit breaker 100 when the circuit breaker 100 is closed. The static contact 150 is connected with the line outlet end 112. The operating mechanism 130 can drive the movable contact group 140 to contact and close with the static contact 150. The above-mentioned circuit breaker 100 can improve the heat dissipation capacity of the circuit breaker 100, and ensure the use safety and reliability of the circuit breaker 100.

[0046] For example, referring to Figure 1 and Figure 5 , the shell 110 is provided with a limiting rod 114 extending along the width direction a of the circuit breaker 100. The limiting rod 114 is arranged on the side of the movable contact group 140 away from the static contact 150 and located at the top of the movable contact 141. When the movable contact 141 moves towards the direction away from the static contact 150, the movable contact 141 can abut against the limiting rod 114.

[0047] Specifically, one end of the contact plate of the movable contact 141 is provided with a movable contact point electrically connected with the static contact 150, and the other end is connected with the contact support 142. The contact plate has a protruding portion between the movable contact point and the contact support 142. The limiting rod 114 is located above the protruding portion of the movable contact 141 and between the top of the shell 110 and the movable contact 141. As shown in Figure 5 , when the movable contact 141 moves towards the direction away from the static contact 150, the movable contact 141 can abut against the limiting rod 114. The arrangement of the limiting rod 114 can limit the movement range of the movable contact 141.

[0048] Since the heat dissipation capacity of the existing circuit breaker is weak, when the heat generation inside the circuit breaker is large, the moving contact is prone to sticking with the shell due to high temperature. This sticking phenomenon can affect the normal operation of the circuit breaker, thereby reducing the use reliability and safety of the circuit breaker. Therefore, the application can avoid the moving contact 141 from contacting the shell 110 by setting the limiting rod 114, prevent the moving contact 141 from sticking with the shell 110, and improve the use reliability and safety of the circuit breaker 100.

[0049] Optionally, please refer to Figure 1 , Figure 2 and Figure 5 , the circuit breaker 100 further comprises a double gold assembly 180, the double gold assembly 180 comprises a double gold traction rod 181 and a double gold plate 182 connected with each other, the double gold plate 182 is arranged on the arc striking plate 171; one end of the double gold traction rod 181 is connected with the moving contact group 140, and the other end is abutted with the double gold plate 182; the limiting rod 114 is arranged on one side of the double gold traction rod 181 in a spaced manner, and the double gold assembly 180 can drive the double gold traction rod 181 to move and abut against the limiting rod 114 when heated, so as to drive the moving contact 141 to move towards the side away from the static contact 150.

[0050] Specifically, the double gold traction rod 181 can bend and deform when heated and move towards the direction of the limiting rod 114 to abut against the limiting rod 114, and at the same time, the double gold traction rod 181 can pull the lock catch 133 and the jump catch 134 to unlock, at this time, the reset tension spring 190 can pull the moving contact 141 to move towards the side away from the static contact 150. The other end of the double gold traction rod 181 abuts against the arc striking plate 171, which can improve the connection stability of the double gold traction rod 181.

[0051] In order to avoid the problem that the moving contact 141 is prone to sticking with the shell 110 due to high temperature when the heat generation inside the circuit breaker 100 is large, the application sets the limiting rod 114 on one side of the double gold traction rod 181. Due to the existence of the limiting rod 114, the movement range of the double gold traction rod 181 can be limited, and when the moving contact 141 moves away to a certain position, the double gold traction rod 181 will abut against the limiting rod 114, thereby avoiding the continuous movement of the moving contact 141, to avoid the moving contact 141 from contacting the shell 110, prevent the moving contact 141 from sticking with the shell 110, and improve the use reliability and safety of the circuit breaker 100.

[0052] Optionally, as Figure 2 and Figure 4As shown, the top of the double-gold plate 182 is connected with one end of the fifth flexible connection 165, and the other end of the fifth flexible connection 165 is connected with the side of the contact plate away from the first flexible connection 161. Through the arrangement of the fifth flexible connection 165, the multi-directional flexible connection can flow the current from different paths into the contact plate, which is beneficial to improve the current distribution uniformity of the contact plate, so that the current conduction path is established between the double-gold assembly 180 and the contact plate, and the current path network inside the circuit breaker 100 is enriched.

[0053] In an implementation of the present application, as shown in Figure 6 As shown, the movable contact group 140 further comprises a contact bracket 142, and the operating mechanism 130 comprises a lock catch 133, which has a receiving cavity on the side facing the movable contact 141, and the contact bracket 142 is arranged in the receiving cavity; the housing 110 has a mounting rod 113 arranged along the width direction a of the circuit breaker 100, the mounting rod 113 is sequentially arranged through the lock catch 133 and the contact bracket 142 to make the lock catch 133 hinged with the housing 110; the contact bracket 142 comprises a receiving cavity arranged along the width direction a of the circuit breaker 100, and a plurality of movable contacts 141 are arranged side by side in the receiving cavity to be connected with the contact bracket 142.

[0054] Specifically, as shown in Figure 6 The lock catch 133 and the contact bracket 142 stably install the contact bracket 142 in the lock catch 133 in a nested manner, so that the combination of the lock catch 133 and the contact bracket 142 is more compact, the space occupied by the movable contact group 140 in the housing 110 of the circuit breaker 100 is reduced, and the miniaturization design of the internal structure of the circuit breaker 100 is facilitated. The arrangement of the mounting rod 113 provides a stable rotating shaft for the lock catch 133 and the contact bracket 142, and ensures the accuracy and reliability of the movement of the lock catch 133.

[0055] As shown in Figure 6 The contact bracket 142 comprises a receiving cavity arranged along the width direction a of the circuit breaker 100, and a plurality of movable contacts 141 are arranged side by side in the receiving cavity to be connected with the contact bracket 142. Through the arrangement of the receiving cavity, the current density of the movable contact 141 can be effectively reduced in the application scenario of large current transmission, and the problems such as heating and electric erosion caused by current concentration are reduced, thereby prolonging the service life of the movable contact 141 and improving the safety and reliability of the circuit breaker 100.

[0056] Optionally, as shown in Figure 6 The lock catch 133 has a driving groove 1331, one end of the double-gold traction rod 181 is arranged in the driving groove 1331, and the other end abuts against the double-gold plate 182; the double-gold traction rod 181 can drive the lock catch 133 to rotate through the driving groove 1331 by being heated.

[0057] The driving slot 1331 on the lock catch 133 is used to realize the interaction between the movable contact group 140 and the double-gold traction rod 181, one end of the double-gold traction rod 181 is embedded in the driving slot 1331, so that when the double-gold traction rod 181 is deformed by heat, the force generated thereby can be quickly and effectively transmitted to the lock catch 133, improving the accuracy and timeliness of the operation of the entire circuit breaker 100.

[0058] For example, the operating mechanism 130 further includes a trip catch 134, which is clamped at the end of the lock catch 133; one end of the movable contact 141 close to the operating mechanism 130 is provided with a first mounting hole, and the other end of the movable contact 141 is provided with a second mounting hole. Figure 6 As shown, the first mounting holes of the two adjacent movable contacts 141 are connected by a connecting shaft 143; the circuit breaker 100 further has a reset tension spring 190, one end of which is fixedly connected with the shell 110 and the other end of which is connected with the connecting shaft 143, for providing a reset force to the operating mechanism 130; after the lock catch 133 and the trip catch 134 are tripped, the reset tension spring 190 drives the movable contact 141 to move towards the side away from the static contact 150.

[0059] Specifically, one end of the reset tension spring 190 is stably fixed on the top of the shell 110, and the other end is connected with the connecting shaft 143, thereby forming a force transmission relationship with the operating mechanism 130. When the operating mechanism 130 drives the movable contact group 140 to perform the opening or closing operation, the reset tension spring 190 will be stretched or compressed accordingly, storing elastic potential energy, thereby providing a reset force to the operating mechanism 130. After the circuit breaker 100 completes the opening operation, the reset tension spring 190 can ensure that the movable contact group 140 can accurately return to the closing preparation position after troubleshooting, so that the distance between the movable contact 141 and the static contact 150 returns to the normal state, so that the next closing operation can be smoothly performed, improving the convenience and automation degree of the operation of the circuit breaker 100; at the same time, the reset tension spring 190 can also buffer the impact force of the operating mechanism 130 and the movable contact group 140 during the movement process to some extent, prolonging the service life of the circuit breaker 100.

[0060] In an embodiment of the present application, as shown in Figure 2 The operating mechanism 130 includes a driven part 131 and a pull rod 132, the driven part 131 is connected with the shell 110; the contact support 142 close to one end of the operating mechanism 130 has a second mounting hole, one end of the pull rod 132 is connected with the driven part 131 and the other end is connected with the contact support 142 through the second mounting hole; the driven part 131 is driven to drive the contact support 142 to move through the pull rod 132, so that the movable contact 141 and the static contact 150 are in contact and closed.

[0061] When the external driving source acts on the driven part 131, the driven part 131 can be driven to rotate and transmit the movement to the contact support 142 through the pull rod 132, so that the contact support 142 drives the whole contactor group 140 to move, finally realizes the contact of the movable contact 141 and the static contact 150, realizes the effective control of the closing operation of the circuit breaker 100, and improves the operation efficiency and reliability of the power system.

[0062] The above only describes optional embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. 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.

[0063] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

Claims

1. A circuit breaker characterized by, The circuit breaker (100) comprises a shell (110), a shunt (120), an operating mechanism (130), a movable contact group (140) and a static contact (150) arranged in the shell (110); the shell (110) has a line-in end (111) arranged at one end of the circuit breaker (100) along the length direction (c) of the circuit breaker (100), a line-out end (112) and a button arranged at the other end of the circuit breaker (100); one end of the shunt (120) is connected with the line-in end (111), and the other end is connected with the movable contact group (140) through a plurality of flexible connections; the static contact (150) is arranged opposite to the movable contact group (140); the movable contact group (140) comprises a plurality of movable contacts (141) arranged side by side; the static contact (150) is connected with the line-out end (112); the operating mechanism (130) can drive the movable contact group (140) to contact the static contact (150) to close the circuit breaker.

2. The circuit breaker of claim 1, wherein, The shunt (120) comprises a body (121) and a connecting portion (122) arranged on each of the opposite sides of the body (121); the connecting portion (122) on the side close to the movable contact group (140) of the body (121) is connected with the contact plate of one of the movable contacts (141) through a first flexible connection (161) and a second flexible connection (162); one end of the first flexible connection (161) and one end of the second flexible connection (162) are arranged side by side against the top surface of the connecting portion (122); the other end of the first flexible connection (161) and the other end of the second flexible connection (162) are connected with the contact plate.

3. The circuit breaker of claim 2, wherein, An arc-extinguishing chamber (170) is further arranged between the shunt (120) and the movable contact group (140); the arc-extinguishing chamber (170) is provided with an arc plate (171) on each of the opposite sides along the height direction (b) of the circuit breaker (100); the connecting portion (122) on the side close to the movable contact group (140) of the body (121) is connected with the contact plate of the other movable contact (141) of the movable contact group (140) through a third flexible connection (163) and with the arc plate (171) through a fourth flexible connection (164); one end of the third flexible connection (163) is connected with the bottom surface of the connecting portion (122), and the other end is connected with the side of the contact plate away from the first flexible connection (161); one end of the fourth flexible connection (164) is connected with the bottom surface of the connecting portion (122), and the other end is connected with the bottom surface of the arc plate (171).

4. The circuit breaker of any one of claims 1-3, wherein, The line-in end (111) is provided with a wire board (1111); the connecting portion (122) on the side close to the line-in end (111) of the shunt (120) is welded with the wire board (1111).

5. The circuit breaker of claim 3, wherein, The shell (110) is provided with a limiting rod (114) extending along the width direction (a) of the circuit breaker (100), the limiting rod (114) is arranged on the side of the movable contact group (140) away from the static contact (150) and at the top of the movable contact (141), and the movable contact (141) can abut against the limiting rod (114) when moving away from the static contact (150).

6. The circuit breaker of claim 5, wherein, The circuit breaker (100) further comprises a double gold assembly (180), the double gold assembly (180) comprises a double gold traction rod (181) and a double gold plate (182) connected with each other, and the double gold plate (182) is arranged on the arc striking plate (171); one end of the double gold traction rod (181) is connected with the movable contact group (140), and the other end abuts against the double gold plate (182); the limiting rod (114) is arranged on one side of the double gold traction rod (181) in a spaced manner, and the double gold assembly (180) can drive the double gold traction rod (181) to move and abut against the limiting rod (114) when heated, so as to drive the movable contact (141) to move away from the static contact (150).

7. The circuit breaker of claim 6, wherein, The top of the double gold plate (182) is connected with one end of a fifth flexible connection (165), and the other end of the fifth flexible connection (165) is connected with the side of the contact plate away from the first flexible connection (161).

8. The circuit breaker of claim 6, wherein, The movable contact group (140) further comprises a contact support (142), the operating mechanism (130) comprises a lock catch (133), the side of the lock catch (133) facing the movable contact (141) is provided with a containing cavity, and the contact support (142) is arranged in the containing cavity; the shell (110) is provided with a mounting rod (113) arranged along the width direction (a) of the circuit breaker (100), the mounting rod (113) sequentially penetrates the lock catch (133) and the contact support (142) to make the lock catch (133) hinged with the shell (110); the contact support (142) comprises a containing cavity arranged along the width direction (a) of the circuit breaker (100), and a plurality of movable contacts (141) are arranged side by side in the containing cavity to be connected with the contact support (142).

9. The circuit breaker of claim 8, wherein, The lock catch (133) (142) is provided with a driving groove (1331), one end of the double gold traction rod (181) is arranged in the driving groove (1331), and the other end abuts against the double gold plate (182); and the double gold traction rod (181) can drive the lock catch (133) to rotate through the driving groove (1331) when heated.

10. The circuit breaker of claim 8, wherein, The operating mechanism (130) further comprises a trip catch (134) clamped on the end of the lock catch (133); the moving contact (141) is provided with a first mounting hole at one end close to the operating mechanism (130), and the first mounting holes of two adjacent moving contacts (141) are connected through a connecting shaft (143); the circuit breaker (100) further has a reset tension spring (190), one end of which is fixedly connected with the shell (110) and the other end is connected with the connecting shaft (143), for providing a reset force to the operating mechanism (130); after the lock catch (133) and the trip catch (134) are tripped, the reset tension spring (190) drives the moving contact (141) to move towards the side away from the static contact (150).

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