circuit breaker

Abstract

The present invention relates to the technical field of low-voltage terminal-side electrical appliances, and particularly to a circuit breaker. The circuit breaker casing has an on button hole and a off button hole provided thereon, a button mechanism has an on button and a off button respectively slidably provided inside the circuit breaker casing, the on button has an on button operating end provided at one end and slidably provided inside the on button hole, the off button has an off button operating end provided at one end and slidably provided inside the off button hole, and when the on button operating end is pressed inside the circuit breaker casing to drive the operating mechanism to turn on the circuit breaker, the off button operating end simultaneously moves outside the circuit breaker casing, preventing accidental operation of the circuit breaker due to accidental contact.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage terminal-side electrical appliances, particularly to circuit breakers.

Background Art

[0002] With the popularization of circuit breakers, the safety of electrical equipment has been effectively improved. However, in order to cope with the miniaturization of electrical equipment, it is necessary to continuously improve and optimize the overall structure and operation mode of circuit breakers to conform to the development trend. After thoroughly investigating the prior art, it is found that the existing circuit breakers have the following defects.

[0003] 1. Existing circuit breakers display the switching state of the circuit breaker circuit by providing many single switch-on / switch-off display structures, which causes the problems that the inner structure of the circuit breaker becomes complex and the overall volume increases. Furthermore, since many buttons of the operating mechanism protrude outside the circuit breaker housing, it is easy to cause misoperation of the circuit breaker due to accidental contact, which affects the stability and safety of power consumption.

[0004] 2. Existing plug-in circuit breakers generally have two types of locking mechanisms. One is to prevent the circuit breaker from being switched on without being installed in a predetermined position, and the other is to prevent the circuit breaker from being inserted into or pulled out of the cabinet in the switched-on state. Therefore, both structures become complex and occupy a large amount of the inner space of the circuit breaker.

[0005] 3. Existing plug-in circuit breakers usually pull out the circuit breaker from its mounting position by pulling a button. However, when the user performs a switching operation by pulling or pushing, it is impossible to grasp the operating force. Therefore, pulling the circuit breaker out of its mounting position too much will affect the stability and safety of the user's power consumption.

[0006] 4. Existing plug-in type circuit breaker enclosures have an illogical design, with scattered openings on the outer shell making it inconvenient to install the circuit breakers. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] The objective of the present invention is to overcome the shortcomings of the prior art and provide a circuit breaker. The circuit breaker is equipped with an on button and a off button, which correspond to the on and off operations of the switch, respectively. In addition, the on / off state of the circuit breaker can be determined by the state of the two buttons. Furthermore, the operating ends of the on button and the off button are provided in the holes for the off button, respectively, thus preventing accidental operation of the circuit breaker due to accidental contact. [Means for solving the problem]

[0008] To achieve the above objective, the solution of the present invention is as follows.

[0009] The circuit breaker comprises a circuit breaker housing 1, a button mechanism 2 provided inside the circuit breaker housing 1, and an operating mechanism connected to the button mechanism 2, wherein the circuit breaker housing 1 is provided with a switch-on button hole 110 and a switch-off button hole 111 provided thereon, the button mechanism 2 is provided with a switch-on button 20 and a switch-off button 21, respectively, which are slidably provided inside the circuit breaker housing 1, the switch-on button 20 is provided with an operating end at one end and slidably provided inside the switch-on button hole 110, and the switch-off button 21 is provided with an operating end at one end and slidably provided inside the switch-off button hole 111.

[0010] The circuit breaker pushes the switch-on button operating end inward into the circuit breaker housing 1 to drive the operating mechanism and switch on the circuit breaker, while the switch-off button operating end moves outward into the circuit breaker housing 1. The switch-off button operating end is then pushed inward into the circuit breaker housing 1 to drive the operating mechanism and switch off the circuit breaker, while the switch-on button operating end moves outward into the circuit breaker housing 1.

[0011] Preferably, the operating mechanism comprises a connecting rod mechanism and a transmission member 4 and a lever mechanism pivotably mounted on the circuit breaker housing 1, the connecting rod mechanism comprising a switch-on connecting rod 30, a switch-off connecting rod 31, and a transmission connecting rod 32, the other end of the switch-on button 20 being drivably connected to the transmission member 4 via the switch-on connecting rod 30, the other end of the switch-off button 21 being drivably connected to the transmission member 4 via the switch-off connecting rod 31, the transmission member 4 being drivably connected to the lever mechanism via the transmission connecting rod 32, the lever mechanism being connected to the movable contact 60 of the circuit breaker, and when the switch-on button 20 is pressed inside the circuit breaker housing 1 to switch on the circuit breaker, the switch-on button 20 drives the transmission member 4 via the switch-on connecting rod 30. As the first direction is rotated, the transmission member 4 drives the switch-off button 21 via the switch-off connecting rod 31 to move it to the outside of the circuit breaker housing 1. When the switch-off button 21 is pushed inward into the circuit breaker housing 1, the switch-off button 21 drives the transmission member 4 via the switch-off connecting rod 31 to rotate in a second direction, and at the same time, the transmission member 4 drives the switch-on button 20 via the switch-on connecting rod 30 to move it to the outside of the circuit breaker housing 1, so that the first and second directions are opposite to each other.

[0012] Preferably, the transmission member 4 comprises a transmission member shaft hole 400, a first connection hole 40, a second connection hole 41, and a third connection hole 42, the first connection hole 41, the second connection hole 41, and the third connection hole 42 each being located at the three vertices of a triangle, the transmission member shaft hole 400 being located in the middle of the transmission member 4, the transmission member 4 being pivotably mounted on the circuit breaker housing 1 via its transmission member shaft hole 400, and the transmission member 4 being connected to the switch-on connecting rod 30, the switch-off connecting rod 31, and the transmission connecting rod 32 via the first connection hole 40, the second connection hole 41, and the third connection hole 42. The lever mechanism comprises a locking element 51, a pull-out element 50, and a rotating plate 52 pivotably mounted on the circuit breaker housing 1. The locking element 51 engages with the pull-out element 50 and is pivotably mounted on the rotating plate 52. The rotating plate 52 is connected to the movable contact 60, and the transmission member 4 is drivably connected to the pull-out element 50 via the transmission connecting rod 32.

[0013] Preferably, the circuit breaker includes a first track mechanism and a second track mechanism for defining the movement paths of the switch-on button 20 and the switch-off button 21, respectively.

[0014] Preferably, the first track mechanism comprises a switch-on button track protrusion 201 provided on the switch-on button 20 and a switch-on button track groove 101 provided on the circuit breaker housing 1, wherein the switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101, and the second track mechanism comprises a switch-off button track groove provided on the circuit breaker housing 1, wherein the switch-on button 21 is slidably provided inside the switch-off button track groove.

[0015] Preferably, the first track mechanism comprises a switch-on button track protrusion 201 provided on the switch-off button 21 and a switch-on button track groove 101 provided on the circuit breaker housing 1, wherein the switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101, and the second track mechanism comprises a switch-off button track protrusion 205 provided on the switch-on button 20 and arranged along the longitudinal direction of the switch-on button 20, and a switch-off button track groove 2150 provided on the switch-off button 21, wherein the switch-off button track groove 2150 slidably cooperates with the switch-off button track protrusion 205.

[0016] Preferably, the circuit breaker further has a locking mechanism which is combined with the button mechanism 2, the locking mechanism has a first locking member 1a which has one end protruding to the outside of the circuit breaker housing 1, and the circuit breaker housing 1 has a locking member opening 17 which is combined with the first locking member 1a. When the circuit breaker is switched off, the first locking member 1a protrudes outward from the locking member opening 17 to the outside of the circuit breaker housing 1, and returns to the inside of the circuit breaker housing 1 under the action of a retracting external force. When the circuit breaker is switched on, the first locking member 1a protrudes to the outside of the circuit breaker housing 1 and is restricted in position by the switch-on button 20 and / or the switch-off button 21, and cannot return to the inside of the circuit breaker housing 1.

[0017] Preferably, the circuit breaker further comprises a lock release mechanism drivably connected to the first locking member 1a, When the circuit breaker is in the switched-off state, the first locking member 1a is returned to the inside of the circuit breaker housing 1 by operating the lock release mechanism.

[0018] Preferably, the first locking member 1a, after returning to the inside of the circuit breaker, is restricted to the switch-on button 20 and / or the switch-off button 21, and the switch-on button 20 and / or the switch-off button 21 prevent the circuit breaker from being switched on. The switch-on button 20 and / or the switch-off button 21 have a button restriction groove 216 that restricts the first locking member 1a, and the first locking member 1a has a first locking member restriction protrusion 14a that restricts the button restriction groove 216. When the circuit breaker is switched on, the button limiting groove 216 is misaligned with the first locking member limiting protrusion 14a, preventing the switch-on button 20 and / or the switch-off button 21 from moving inward into the circuit breaker housing 1. When the circuit breaker is switched off, the button limiting groove 216 is positioned opposite the first locking member limiting protrusion 14a, allowing the first locking member 1a to move inward into the circuit breaker housing 1 under the action of a retracting external force, causing the first locking member limiting protrusion 14a to slide into the button limiting groove 216 and lock the switch-on button 20 and / or the switch-off button 21.

[0019] Preferably, the switch-on button 20 is arranged parallel to the switch-off button 21 and is provided to slide linearly inside the circuit breaker housing 1, the first locking member 1a is provided to move linearly inside the housing 6, the direction of movement of the switch-on button 20 and the switch-off button 21 is perpendicular to the direction of movement of the first locking member 1a. The locking mechanism further includes a first return spring 5a provided between the first locking member 1a and the circuit breaker housing 1, the first return spring 5a applying force to the first locking member 1a, causing one end of the first locking member 1a to protrude to the outside of the circuit breaker housing 1.

[0020] Preferably, the switch-on button 20 and the first locking member 1a are located between the switch-off button 21 and the locking member opening 17, the first locking member 1a is located on one side of the switch-on button 20, the switch-off button 21 has a button limiting groove 216 that cooperates with the first locking member 1a in position limiting, the first locking member 1a has a first locking member limiting protrusion 14a that cooperates with the button limiting groove 216, and the switch-on button 20 is provided with a switch-on button avoidance groove 206 to avoid the first locking member limiting protrusion 14a of the first locking member 1a. When one end of the first locking member 1a protrudes to the outside of the circuit breaker housing 1, the first locking member limiting protrusion 14a is located inside the switch button avoidance groove 206, and the width of the switch button avoidance groove 206 is sufficiently larger than the width of the first locking member limiting protrusion 14a in the direction of movement of the switch button 20, thereby moving the switch button 20 and the switch off button 21 to operate the circuit breaker on / off. When the circuit breaker is switched on, the button restriction groove 216 is positioned offset from the first locking member restriction protrusion 14a, and the first locking member restriction protrusion 14a is located inside the switch button avoidance groove 206, so that the switch button 20 prevents the first locking member 1a from moving inside the circuit breaker housing 1. When the circuit breaker is switched off, the button restriction groove 216 is positioned opposite the first locking member restriction protrusion 14a, so that the first locking member 1a can move inside the circuit breaker housing 1 under the action of a retraction force, causing the first locking member restriction protrusion 14a to slide into the button restriction groove 216.

[0021] Preferably, the circuit breaker further comprises a locking mechanism which is combined with the button mechanism 2, the locking mechanism which comprises a second locking member 1b which is pivotably mounted on the circuit breaker housing 1, and the second locking member 1b comprises a second locking end 13b, By pressing the switch-on button 20 and driving the operating mechanism, the circuit breaker is switched on, and at the same time, the switch-off button 21 is moved to the outside of the circuit breaker housing 1, and the switch-on button 20 and / or the switch-off button 21 rotate the second locking member 1b so that the second locking end 13b protrudes to the outside of the circuit breaker housing 1, and the second locking member 1b is restricted by the switch-on button 20 and / or the switch-off button 21 and cannot return to the inside of the circuit breaker housing 1, and by pressing the switch-off button 21 and driving the operating mechanism, the circuit breaker is switched off, and at the same time, the switch-on button 20 is moved to the outside of the circuit breaker housing 1, and the switch-on button 20 and / or the switch-off button 21 drive the second locking member 1b and rotate it in the opposite direction so that the second locking end 13b returns to the inside of the circuit breaker housing 1.

[0022] Preferably, the switch-on button 20 has a switch-on button drive unit 207 that drives in conjunction with the second locking member 1b, and the switch-off button 21 has a switch-off button drive unit 217 that drives in conjunction with the second locking member 1b, and when the circuit breaker is switched on, the switch-off button 21 rotates the second locking member 1b via the switch-off button drive unit 217, causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1, and the release button drive unit 21 7 supports the second locking end 13b, preventing it from returning to the inside of the circuit breaker housing 1. When the circuit breaker is switched off, the switch button 20 rotates the second locking member 1b via the switch button drive unit 207, causing the second locking end 13b to return to the inside of the circuit breaker housing 1. The switch button drive unit 207 also restricts the second locking end 13b, thereby holding it inside the circuit breaker housing 1.

[0023] Preferably, the second locking member 1b includes a second locking member mounting portion 10b pivotally connected to the circuit breaker housing 1, a first passive portion 11b of the locking member that drives and mates with the switch-off button 21, a second passive portion 12b of the locking member that drives and mates with the switch-on button 20, and a second locking end 13b. When the circuit breaker turns on the switch, the switch-off button 21 rotates the second locking member 1b through the first passive portion 11b of the locking member, causing the second locking end 13b to protrude outside the circuit breaker housing 1. When the circuit breaker turns off the switch, the switch-on button 20 rotates the second locking member 1b through the second passive portion 12b of the locking member, causing the second locking end 13b to return to the outside of the circuit breaker housing 1. The second locking member 1b is arranged to overlap the switch-on button 20 and the switch-off button 21 along the thickness direction of the circuit breaker.

[0024] Preferably, the first passive portion 11b of the locking member has a first passive protrusion 110b of the locking member that protrudes from one side of the switch-off button 21, and the second passive portion 12b of the locking member has a second passive protrusion 120b of the locking member that protrudes from one side of the switch-on button 20. The switch-on button driving portion 207 has a switch-on button driving slope 2070 that drives and mates with the second passive protrusion 120b of the locking member, and the switch-off button driving portion 217 has a switch-off button driving slope 21700 that drives and mates with the first passive protrusion 110b of the locking member. The inclination direction of the switch-on button driving slope 2070 is opposite to the inclination direction of the switch-off button driving slope 21700. The first passive protrusion 110b of the locking member and the second passive protrusion 120b of the locking member are located between the switch-off button driving slope 21700 and the switch-off button driving slope 21700. When turning on the circuit breaker by pressing the switch-on button 20, the switch-on button driving slope 2070 moves inside the circuit breaker housing 1 together with the switch-on button 20, avoiding the second locking member 1b. At the same time, the switch-off button driving slope 21700 moves outside the circuit breaker housing 1 together with the switch-off button 21, and rotates the second locking member 1b through the first passive protrusion 110b of the locking member, causing the second locking end 13b to protrude outside the circuit breaker housing 1. Moreover, the driving slope 21700 supports the first passive protrusion 110b of the locking member to prevent the second locking member 1b from returning inside the circuit breaker housing 1. When turning off the circuit breaker by pressing the switch-off button 21, the switch-off button driving slope 21700 moves inside the circuit breaker housing 1 together with the switch-off button 21, avoiding the second locking member 1b. At the same time, the switch-on button driving slope 2070 moves outside the circuit breaker housing 1 together with the switch-on button 20, presses the second passive protrusion 120b of the locking member to return the second locking end 13b inside the circuit breaker housing 1, and restricts the second locking member 1b to hold it inside the circuit breaker housing 1.

[0025] In the circuit breaker of the present invention, the button mechanism has an on-button and a off-button. In addition to the user pressing the on-button and off-button respectively to switch the circuit breaker on / off, the direction of movement of the on-button is opposite to that of the off-button. That is, when the on-button / off-button is pushed inward towards the circuit breaker housing to switch the circuit breaker on / off, the on-button / off-button moves outward towards the circuit breaker housing. In other words, the user can determine the state of the circuit breaker (on / off state) by observing the state of the on-button / off-button. Firstly, compared to existing circuit breakers that use a pull / push mechanism to switch the circuit breaker on / off, the circuit breaker of the present invention switches the circuit breaker on / off by pressing a button, thus preventing situations in which the circuit breaker may be accidentally removed. Secondly, the state of the circuit breaker can be determined by observing the state of the switch-on and switch-off buttons, eliminating the need to individually set switch-on and switch-off indicators. This simplifies the structure of the circuit breaker, saves internal space, and is advantageous for the trend towards miniaturization of circuit breakers. Thirdly, the operating ends of the switch-on and switch-off buttons are located inside the switch-on and switch-off button holes, respectively, and do not protrude from the circuit breaker housing, preventing accidental operation of the circuit breaker due to accidental contact.

[0026] Furthermore, the first locking member retracts inward into the circuit breaker housing under the action of a retracting external force, locking the switch-on button and / or switch-off button, preventing the circuit breaker from being switched on. Therefore, if the plug-in type circuit breaker of the present invention is not assembled in the designated assembly position of the circuit breaker, the assembly housing of the circuit breaker pushes the first locking member and moves inward into the circuit breaker housing, locking the switch-on button and / or switch-off button, thereby preventing the switch-on operation from continuing even if the plug-in type circuit breaker is not installed in the designated position, and thus protecting the personal safety of the user. Also, when the circuit breaker is in the switched-on state, the switch-on button and / or switch-off button prevent the first locking member from moving inward into the circuit breaker housing. Therefore, the plug-in type circuit breaker of the present invention, once switched on, cannot be installed in its assembly position, thereby ensuring that the circuit breaker can be installed in its assembly position when switched off, and also ensuring that the circuit breaker cannot be pulled out from its assembly position when switched on, thus protecting the personal safety of the user.

[0027] Furthermore, the second locking end of the second locking member protrudes / retracts to the outside / inside of the circuit breaker housing when the circuit breaker is switched on / off, thereby preventing situations where the circuit breaker is installed in its assembly position when switched on, or pulled out from its assembly position when switched on, thus protecting the electrical and personal safety of the user. Moreover, in the plug-in type circuit breaker of the present invention, the button mechanism has a switch-on button and a switch-off button, so that in addition to the user pressing the switch-on button and the switch-off button respectively to switch the circuit breaker on / off, the direction of movement of the switch-on button is opposite to that of the switch-off button. That is, when the switch-on button / switch-off button is pressed towards the inside of the circuit breaker housing to switch the circuit breaker on / off, the switch-on button / switch-off button moves towards the outside of the circuit breaker housing. In other words, the user can determine the state of the circuit breaker (switch-on / switch-off state) by observing the state of the switch-on button / switch-off button. [Brief explanation of the drawing]

[0028] [Figure 1] This is a schematic diagram of the circuit breaker of the present invention, showing at least the structure of the operating mechanism. [Figure 2] This is an enlarged schematic diagram of portion A in Figure 1 of the present invention. [Figure 3] This is an exploded view of the structure of the circuit breaker of the present invention, showing at least a first embodiment of the first track mechanism and the second track mechanism. [Figure 4] This is a schematic diagram of the first embodiment of the switch-on button of the present invention. [Figure 5] This is a schematic diagram of the first embodiment of the switch button of the present invention. [Figure 6] This is a schematic diagram of the transmission member of the present invention. [Figure 7] This is a schematic diagram of the circuit breaker housing of the present invention, showing at least a second embodiment of the first track mechanism. [Figure 8]This is a schematic diagram of a second embodiment of the switch-on button of the present invention. [Figure 9] This is a schematic diagram of a second embodiment of the switch button of the present invention. [Figure 10] This is a schematic diagram of the assembly structure of the tensioning member and the first locking member of the present invention. [Figure 11A] This is a schematic diagram of the assembly structure of the tensioning member and the first locking member of the present invention, wherein the tensioning member holding magnet provided in the circuit breaker housing cooperates with the tensioning member operating portion of the tensioning member in a magnetically absorbable manner. [Figure 11B] This is a schematic diagram of the assembly structure of the tension member and the first locking member of the present invention, in which a tension member return spring is provided between the tension member spring limiting portion and the tension member limiting reinforcement of the tension member. [Figure 12] This is a schematic diagram of the assembly structure of the tensioning member and the first locking member of the present invention, in which case the tensioning member drive unit moves the first locking member toward the inside of the circuit breaker housing via an interlocking member. [Figure 13] This is a schematic diagram of the assembly structure of the pulling member and the first locking member of the present invention. In this case, the entire first locking member is placed inside the circuit breaker housing, and the circuit breaker is pulled out from its assembly position by continuously pulling the pulling member. [Figure 14] This is a schematic diagram of the arrangement of the first locking member and the button mechanism of the present invention. In this case, the circuit breaker is in the switched-on state, and the switch-off button prevents the first locking member from moving inward into the circuit breaker housing. [Figure 15] This is a schematic diagram of the arrangement of the first locking member and the button mechanism of the present invention. In this case, the circuit breaker is in the switched-off state, the button limiting groove of the switch-off button faces the limiting protrusion of the first locking member, and the first locking member can move inward into the circuit breaker housing. [Figure 16] This is a schematic structural diagram of a first embodiment of the first locking member of the present invention. [Figure 17] This is a schematic structural diagram of a second embodiment of the first locking member of the present invention. [Figure 18] This is a schematic diagram of the tension member of the present invention. [Figure 19] This is a schematic diagram of the circuit breaker housing of the present invention, in which the pull member extraction groove is provided between the second output wire hole and the pull member operation hole. [Figure 20] This is a schematic diagram of the circuit breaker housing of the present invention, in which the pull member extraction groove is provided between the switch release button hole and the pull member operation hole. [Figure 21] This is a schematic diagram of the assembly structure of the second locking member of the present invention. [Figure 22] This is a schematic diagram of the arrangement of the second locking member and the button mechanism of the present invention. In this case, the circuit breaker is in the off position, and the switch-on button rotates the second locking member, retracting it into the inside of the circuit breaker housing. [Figure 23] This is a schematic diagram of the switch-on button and switch-off button of the present invention, showing the structure of the switch-on button drive unit and the switch-off button drive unit. [Figure 24] This is a schematic diagram of the arrangement of the second locking member and the button mechanism of the present invention. In this case, the circuit breaker is in the switched-on state, and the switch-off button rotates the second locking member, causing the second locking member to protrude to the outside of the circuit breaker housing. [Figure 25] This is a schematic diagram of the circuit breaker housing of the present invention, showing the positional relationship between the button hole, output wire hole, wire removal hole, and pull member operation hole. [Modes for carrying out the invention]

[0029] Specific embodiments of the plug-in circuit breaker of the present invention will be further described in conjunction with the embodiment shown in Figure 1-25. The plug-in circuit breaker of the present invention is not limited to the description below.

[0030] As shown in Figure 1, the circuit breaker of the present invention, in particular a plug-in type circuit breaker, comprises a circuit breaker housing 1, a button mechanism 2 provided inside the circuit breaker housing 1, an operating mechanism connected to the button mechanism, a movable contact 60 connected to the operating mechanism, and a stationary contact 61 cooperating with the movable contact 60. By operating the button mechanism 2, the circuit breaker is driven to switch on / off via the operating mechanism, causing the movable contact 60 to close / separate from the stationary contact 61.

[0031] Of course, as required, as shown in Figure 1, the circuit breaker of the present invention further comprises a short-circuit protection mechanism 7, an overload protection mechanism and an arc extinguishing system 8, provided inside the circuit breaker housing 1. The short-circuit protection mechanism 7 and the overload protection mechanism drive their respective operating mechanisms to trip the circuit breaker when a short circuit or overload fault occurs in the circuit breaker, thereby performing basic circuit protection functions. The arc extinguishing system 8 is used to extinguish arcs generated when the movable contact 60 is separated from the stationary contact 61, which is advantageous in improving the tripping performance of the circuit breaker and improving the safety of power consumption.

[0032] As shown in Figures 1-3, the circuit breaker housing 1 includes a switch-on button hole 110 and a switch-off button hole 111 provided on it. The button mechanism 2 includes a switch-on button 20 and a switch-off release button 21, which are slidably provided on the inside of the circuit breaker housing 1. The switch-on button 20 includes a switch-on button operating end provided at one end and slidably provided inside the switch-on button hole 110. The switch-off button 21 includes a switch-off button operating end provided at one end and slidably provided inside the switch-off button hole 111. By pushing the switch-on button operating end / switch-off button operating end inward into the circuit breaker housing 1, the operating mechanism is driven to switch the circuit breaker on / off, and at the same time, the corresponding switch-off button operating end / switch-on button operating end moves to the outside of the circuit breaker housing 1.

[0033] Furthermore, as shown in Figures 1 and 2, the operating mechanism comprises a connecting rod mechanism and a transmission member 4 and lever mechanism pivotably mounted inside the circuit breaker housing 1. The connecting rod mechanism includes a switch-on connecting rod 30, a switch-off connecting rod 31, and a transmission connecting rod 32. The other end of the switch-on button 20 is drivably connected to the transmission member 4 via the switch-on connecting rod 30, and the other end of the switch-off button 21 is drivably connected to the transmission member 4 via the switch-off connecting rod 31. The transmission member 4 is drivably connected to the lever mechanism via the transmission connecting rod 32, and the lever mechanism is connected to the movable contact 60 of the circuit breaker. When the circuit breaker is switched on by pressing the switch-on button 20, the switch-on button 20 drives the transmission member 4 via the switch-on connecting rod 30 to rotate in the first direction, and at the same time, the rotation of the transmission member 4 drives the switch-off button 21 via the switch-off connecting rod 31 to move it out of the circuit breaker housing 1. When the circuit breaker is switched off by pressing the switch-off button 21, the switch-off button 21 drives the transmission member 4 via the switch-off connecting rod 31 to rotate in the second direction, and at the same time, the rotation of the transmission member 4 drives the switch-on button 20 via the switch-on connecting rod 30 to move it out of the circuit breaker housing 1. The first and second directions are opposite to each other. Here, the function of the transmission member 4 is very similar to that of the handle of a conventional small circuit breaker. The switch-on button 20 and the switch-off button 21 are interlocked with the transmission member 4 via connecting rods, and the connecting rod mechanism may employ existing solutions such as four connecting rods or multiple connecting rods.

[0034] One improvement in the circuit breaker of the present invention is that the button mechanism 2 includes a switch-on button 20 and a switch-off button 21. In addition to the user pressing the switch-on button 20 / switch-off button 21 to switch the circuit breaker on / off, the direction of movement of the switch-on button 20 is opposite to that of the switch-off button 21. That is, the user pushes the switch-on button 20 / switch-off button 21 towards the inside of the circuit breaker housing 1 to switch the circuit breaker on / off, while the corresponding switch-off button 21 / switch-on button 20 moves towards the outside of the circuit breaker housing 1. In other words, the user can determine the state of the circuit breaker (on / off state) by observing the state of the switch-on button 20 / switch-off button 21. Firstly, compared to existing circuit breakers that use a pull / push mechanism to switch the circuit breaker on / off, the circuit breaker of the present invention achieves the switch-on / switch-off operation by pressing a button, thus preventing situations in which the circuit breaker may be accidentally removed. Secondly, since the state of the circuit breaker can be determined by observing the state of the switch-on button 20 and the switch-off button 21, there is no need to individually set the switch-on and switch-off indicator devices, which simplifies the structure of the circuit breaker, saves internal space within the circuit breaker, and is advantageous for the trend towards miniaturization of circuit breakers.

[0035] Preferably, as shown in Figure 10-24, the circuit breaker of the present invention further comprises a locking mechanism and a release mechanism provided inside the circuit breaker housing 1. As shown in Figures 10-18, the locking mechanism has a first locking member 1a with one end protruding outside the circuit breaker housing 1, and in addition, a locking member opening 17 is provided in the circuit breaker housing 1 to accommodate the locking mechanism, and an assembly restriction hole is provided in the assembly position housing of the circuit breaker. After the circuit breaker is assembled in a predetermined position, the locking member opening 17 of the plug-in type circuit breaker corresponds to the assembly restriction hole. If the plug-in type circuit breaker is not assembled in a predetermined position, the locking member opening 17 of the plug-in type circuit breaker is misaligned with the assembly restriction hole, and the assembly position housing obstructs the locking member opening 17. The above is in the prior art of this field and will not be repeated here.

[0036] Another improvement in the circuit breaker of the present invention relates to the locking structure. When the circuit breaker is switched off, one end of the first member 1a protrudes from the locking member opening 17 and extends to the outside of the circuit breaker housing 1, and the first locking member 1a can be retracted to the inside of the circuit breaker housing 1 under the action of a retraction external force. Furthermore, the first locking member 1a cooperates with the switch-on button 20 and / or the switch-off button 21 in position restriction, locking the switch-on button 20 and / or the switch-off button 21 to prevent the circuit breaker from being switched on. When the circuit breaker is switched on, one end of the first locking member 1a protrudes to the outside of the circuit breaker housing 1 and is restricted in position by the switch-on button 20 and / or the switch-off button 21, and cannot be retracted to the inside of the circuit breaker housing 1. If the first locking member 1a protrudes outside the circuit breaker housing 1, the first locking member 1a does not lock the switch-on button 20 and / or the switch-off button 21, and in this case, the switch-on button 20 and / or the switch-off button 21 can perform normal switch-on / switch-off operations.

[0037] Preferably, as shown in Figures 10-17, when the circuit breaker is switched on and before it is installed in its assembly position, one end of the first locking member 1a protrudes outside the circuit breaker housing 1 and is restricted in position by the switch-on button 20 and / or the switch-off button 21, preventing it from retracting inside the circuit breaker housing 1. This prevents the circuit breaker from being inserted into its assembly position while it is switched on.

[0038] When a circuit breaker is installed in its assembly position, the assembly housing at the circuit breaker's assembly position applies a retraction force to the first locking member 1a during the assembly process, pushing the first locking member 1a inward and causing it to retract into the circuit breaker housing 1. Furthermore, the first locking member 1a cooperates with the switch-on button 20 and / or the switch-off button 21 in positional constraint, locking the switch-on button 20 and / or the switch-off button 21 to prevent the circuit breaker from being switched on, and preventing the circuit breaker from being switched on during the assembly process enhances safety.

[0039] After the circuit breaker is assembled in the predetermined position, the locking member opening 17 corresponds to the assembly restriction hole, and the assembly position housing retracts into the first locking member 1a, preventing any external force from being applied, causing the first locking member 1a to protrude outwards from the circuit breaker housing 1 again. By releasing the button mechanism 2 and cooperating the first locking member 1a with the assembly position housing to move to the restricted position, the circuit breaker can be switched on / off normally via the switch-on button 20 and / or switch-off button 21, and it is prevented from being freely pulled out from the assembly position, ensuring that the circuit breaker is not dislodged from its assembly position due to vibrations during transport.

[0040] After the circuit breaker is assembled in its designated position, if the circuit breaker is in the switched-on state, the switch-on button 20 and / or switch-off button 21 prevent the first locking member 1a from moving inward into the circuit breaker housing 1, thereby preventing the circuit breaker from being pulled out from its assembly position while in the switched-on state.

[0041] Furthermore, as shown in Figures 10-13 and 18, when the circuit breaker is switched off, the release mechanism is operated to drive the first locking member 1a to move it inward into the circuit breaker housing 1, retracting it inward into the circuit breaker housing 1, releasing the restriction between the first locking member 1a and the assembly position housing, and cooperating with the button mechanism 2 in position restriction.

[0042] The circuit breaker locking mechanism of the present invention, in cooperation with the switch-on button 20 and / or switch-off button 21, locks the switch-on button 20 and / or switch-off button 21 when the circuit breaker is installed in its assembly position, thereby preventing the circuit breaker from being accidentally switched on by user error / accidental contact during installation, and protecting the user's personal safety. Furthermore, when the circuit breaker is in the switched-on state, the switch-on button 20 and / or switch-off button 21 prevent the first locking member 1a from moving inward into the circuit breaker housing 1. In other words, once the circuit breaker is switched on, it cannot be installed in its mounting position or pulled out from its mounting position at will. Therefore, it is ensured that the circuit breaker is installed in its assembly position or pulled out from its assembly position when the switch is off, protecting the user's personal safety.

[0043] As should be noted, the "locking / unlocking button mechanism 2" is to perform / release a restrictive combination with the button mechanism 2 via the first locking member 1a, thereby preventing / allowing the switch-on button 20 and the switch-off button 21 to move in the design direction (i.e., the switch-on direction / switch-off direction).

[0044] After the circuit breaker is installed in its assembly position and assembled in the predetermined position, the first locking member 1a cooperates with the assembly position housing of the circuit breaker to restrict its position. The release mechanism has an independent pulling member 2a that cooperates movably with the first locking member 1a. When the circuit breaker is switched off, the pulling member 2a is pulled to drive the first locking member 1a inward into the circuit breaker housing 1, and by retracting it inward into the circuit breaker housing 1, the first locking member 1a releases its restrictive cooperation with the mounting position housing, allowing the circuit breaker to be pulled out from its mounting position. Furthermore, as shown in Figures 10-13, the release mechanism further has an interlocking member 3a, one end of which cooperates movably with the first locking member 1a, and the other end which cooperates movably with the pulling member 2a. The pulling member 2a is pulled to rotate the interlocking member 3a, moving the first locking member 1a inward into the circuit breaker housing 1, retracting it inward, and releasing the restriction between the assembly position housing and the locking member. Compared to existing circuit breakers that release the restriction between the assembly position housing and the locking member with a pull button, another improvement of the present invention is that the circuit breaker is equipped with a separate pulling member 2a for the release mechanism. Since a button mechanism is not used to release the first locking member, the situation of accidentally pulling out the circuit breaker by pulling the button is avoided. Furthermore, in the release mechanism of the present invention, the pulling member 2a cooperates with the first locking member 1a drivably via the interlocking member 3a, thereby improving the fault tolerance of the release mechanism, lowering the structural precision requirements for the pulling member 2a, interlocking member 3a, and first locking member 1a, reducing manufacturing difficulties, and improving manufacturing efficiency.

[0045] Preferably, as shown in Figures 21-24, the locking mechanism has a second locking member 1b pivotably mounted on the circuit breaker housing 1, and the second locking member 1b has a second locking end 13b. By pressing the switch-on button 20 and / or the switch-off button 21, the circuit breaker is switched on and at the same time the switch-off button 21 is moved to the outside of the circuit breaker housing 1. The switch-on button 20 and / or the switch-off button 21 rotate the second locking member 1b so that the second locking end 13b protrudes to the outside of the circuit breaker housing 1. Furthermore, the second locking member 1b cannot be retracted inward from the circuit breaker housing 1, as it is restricted by the switch-on button 20 and / or the switch-off button 21. When the switch-off button 21 is pressed to drive the operating mechanism and cause the circuit breaker to switch off, and at the same time the switch-on button 20 is moved to the outside of the circuit breaker housing 1, the switch-on button 20 and / or the switch-off button 21 drive the second locking member 1b and rotate in the opposite direction, causing the second locking end 13b to retract inward into the circuit breaker housing 1.

[0046] Furthermore, as shown in Figures 22 and 24, when the circuit breaker is switched on, the switch-off button 21 rotatably drives the second locking member 1b, causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1. When the circuit breaker is switched off, the switch-on button 20 rotatably drives the second locking member 1b, causing the second locking end 13b to retract to the inside of the circuit breaker housing 1. Of course, when the circuit breaker is switched on, the switch-on button 20 also drives the second locking end 13b to protrude to the outside of the circuit breaker housing 1, and when the switch is turned off, the switch-off button 21 drives the second locking end 13b to retract to the inside of the circuit breaker housing 1. In the circuit breaker of the present invention, the locking mechanism further comprises a second locking member 1b. When the circuit breaker is switched on, the second locking end 13b of the second locking member 1b protrudes to the outside of the circuit breaker housing 1, thereby preventing the circuit breaker from being installed in its assembly position or pulled out from its assembly position while switched on, thus protecting the electrical and personal safety of the user.

[0047] It should be noted that the first locking member 1a and the second locking member 1b of the locking mechanism of the present invention have both identical and different functions, and can coexist in a way that improves the electrical safety of the circuit breaker. Of course, it is also possible to provide only the first locking member 1a or only the second locking member 1b. When both the first locking member 1a and the second locking member 1b are provided simultaneously, if the circuit breaker is switched on outside its assembly position, both the first locking member 1a and the second locking member 1b will protrude from the circuit breaker housing, preventing the circuit breaker from being installed in its assembly position. If the circuit breaker is installed in its assembly position but not installed in the predetermined position, the first locking member 1a will be pushed back into the circuit breaker housing by the assembly position housing, preventing the switch button from being activated. When the circuit breaker is installed in its assembly position and the switch is turned on after it has been installed in the predetermined position, both the first locking member 1a and the second locking member 1b protrude from the circuit breaker housing and cannot be released or pulled out from the circuit breaker's assembly position. When the switch is turned off after the circuit breaker is installed in its assembly position, the second locking member 1b retracts into the circuit breaker housing 1, and the first locking member 1a still protrudes from the circuit breaker housing, preventing the circuit breaker from coming off its assembly position due to vibration during transport or other situations. When the switch is turned off after the circuit breaker is installed in its assembly position, the pull member 2a is pulled outward, and the first locking member 1a is pulled back into the circuit breaker housing by the pull member 2a, releasing the lock. The circuit breaker is moved by continuing to pull the first locking member 1a and pull it out of the cabinet.

[0048] Preferably, Figures 19, 20, and 25 show one embodiment of the circuit breaker housing 1.

[0049] The circuit breaker housing 1 has a hexahedral structure and comprises a front wall 1001 and a rear wall 1002 facing each other, an output wire hole 112, button holes 110-111 and a pull member operation hole 113 provided on the front wall 1001, and an input wire hole 14 provided on the rear wall 1002. The output wire hole 112, button holes 110-111 and the pull member operation hole 113 of the circuit breaker housing 1 are located on the front wall 1001, allowing for easier operation. The input wire hole 14 is provided on the rear wall 1002 facing the front wall 1001, increasing the creepage distance between the input wire end and the output wire end, which is advantageous in improving the insulation performance of the circuit breaker. Also, as shown in Figure 25, the button holes 110-111 include a switch-on button hole 110 and a switch-off button hole 111 provided side by side. The above structure makes it convenient to provide separate on-buttons and off-buttons for the circuit breaker, allowing the circuit breaker to be switched on / off via various mechanisms. Compared to existing circuit breakers that use a pull / push mechanism to switch on / off, this structure prevents the circuit breaker from being pulled out with excessive force when the button is pulled to switch it off.

[0050] The circuit breaker of the present invention will be further described in conjunction with the drawings and specific embodiments.

[0051] As shown in Figures 1-3, the circuit breaker of this embodiment is a plug-in type circuit breaker and comprises a circuit breaker housing 1, a button mechanism 2 provided inside the circuit breaker housing 1, an operating mechanism connected to the circuit breaker housing 1, an operating button 2, a movable contact 60 connected to the operating mechanism, and a stationary contact 61 that cooperates with the movable contact 60. When the button mechanism 2 is operated, the circuit breaker is switched on / off via the operating mechanism, and the movable contact 60 is closed / separated from the stationary contact 61. Of course, as required, as shown in Figure 1, the circuit breaker of the present invention further comprises a short-circuit protection mechanism 7 provided inside the circuit breaker housing 1, an overload protection mechanism and an arc extinguishing system 8. The short-circuit protection mechanism 7 and the overload protection mechanism drive the operating mechanism to pull off the circuit breaker, respectively, when a short circuit or overload fault occurs in the circuit breaker, thereby performing basic circuit protection functions. The arc extinguishing system 8 is used to extinguish arcs that occur when the movable contact 60 is separated from the stationary contact 61, which is advantageous in improving the tripping performance of the circuit breaker and improving the safety of power consumption. Furthermore, the short-circuit protection mechanism 7 and the overload protection mechanism are an electromagnetic releaser and a double metal piece that cooperate with the operating mechanism, respectively. The arc extinguishing system 8 is an arc extinguishing chamber provided on one side of the movable contact and the stationary contact 61. The arc extinguishing chamber comprises a side wall of the arc extinguishing chamber and a plurality of arc extinguishing thin plates provided between the side wall of the arc extinguishing chamber.

[0052] Preferably, Figure 1-9 shows one embodiment of the operating mechanism.

[0053] As shown in Figures 1 and 2, the circuit breaker housing 1 is provided with a switch-on button hole 110 and a switch-off button hole 111. The button mechanism 2 is provided with a switch-on button 20 and a switch-off button 21, which are slidably mounted inside the circuit breaker housing 1. The switch-on button 20 has a switch-on button operating end provided at one end and slidably mounted inside the switch-on button hole 110, and the switch-off button 21 has a switch-off button operating end provided at one end and slidably mounted inside the switch-off button hole 111. When the switch-on button operating end / switch-off button operating end is pushed inside the circuit breaker housing 1, the circuit breaker is switched on / off, and at the same time, the switch-on button operating end / switch-off button operating end moves outside the circuit breaker housing 1.

[0054] Furthermore, as shown in Figures 1 and 2, the operating mechanism comprises a connecting rod mechanism and a transmission member 4 and lever mechanism pivotably mounted on the circuit breaker housing 1. The connecting rod mechanism includes a switch-on connecting rod 30, a switch-off connecting rod 31, and a transmission connecting rod 32. The other end of the switch-on button 20 is drivably connected to the transmission member 4 via the switch-on connecting rod 30, and the other end of the switch-off button 21 is drivably connected to the transmission member 4 via the switch-off connecting rod 31. The transmission member 4 is drivably connected to the lever mechanism via the transmission connecting rod 32, and the lever mechanism is connected to the movable contact 60 of the circuit breaker. When the switch-on button 20 is pressed inward into the circuit breaker housing 1 to switch on the circuit breaker, the switch-on button 20 drives the transmission member 4 to rotate in the first direction via the switch-on connecting rod 30. At the same time, the rotation of the transmission member 4 drives the switch-off button 21 to move outward into the circuit breaker housing 1 via the switch-off connecting rod 31. When the switch-off button 21 is pressed inward into the circuit breaker housing 1 to switch off the circuit breaker, the switch-off button 21 drives the transmission member 4 to rotate in the second direction via the switch-off connecting rod 31. At the same time, the rotation of the transmission member 4 drives the switch-on button 20 to move outward into the circuit breaker housing 1 via the switch-on connecting rod 30. The first and second directions are opposite to each other.

[0055] Furthermore, as shown in Figures 1 and 2, the lever mechanism comprises a locking element 51, a pull-out element 50, and a rotating plate 52. The rotating plate 52 is pivotably mounted on the circuit breaker housing 1, and the locking element 51 is engaged with the pull-out element 50 and both are rotatably mounted on the rotating plate 52. The rotating plate 52 is connected to a movable contact 60, and the transmission member 4 is drivably connected to the pull-out element 50 via a transmission connecting rod 32. The transmission member 4 rotates in a first direction, driving the lever mechanism as a whole in the first direction via the transmission connecting rod 32. The lever mechanism causes the movable contact 60 to swing, thereby switching on the circuit breaker. The transmission member 4 rotates in a second direction, rotating the pull-out element 50 in the second direction via the transmission connecting rod 32, releasing the engagement between the pull-out element 50 and the locking element 51, thereby switching off the circuit breaker. In the event of a short circuit or overload failure in the circuit breaker, the short-circuit protection mechanism 7 or the overload protection mechanism activates the locking element 51 to release the locking mechanism between the pull-out element 50 and the locking element 51, thereby pulling off the circuit breaker for protection. The movable contact 60 is connected to the rotating plate 52 via an elastic member to reach the over-extension amount of the movable contact 60. Of course, the connecting rod mechanism may employ other solutions, all of which fall within the scope of protection of the present invention. Preferably, Figure 6 shows one embodiment of the transmission member 4.

[0056] As shown in Figure 6, the transmission member 4 comprises a transmission member shaft hole 400, a first connection hole 40, a second connection hole 41, and a third connection hole 42. The first connection hole 41, the second connection hole 41, and the third connection hole 42 are located at the three vertices of a triangle, and the transmission member shaft hole 400 is located in the middle of the transmission member 4. The first connection hole 40 and the third connection hole 42 are located on one side of the transmission member shaft hole 400, and the second connection hole 41 is located on the other side of the transmission member shaft hole 400. The transmission member 4 is pivotably mounted in the circuit breaker housing 1 via its transmission member shaft hole 400, and the transmission member 4 connects to the switch-on connecting rod 30, the switch-off connecting rod 31, and the transmission connecting rod 32 via the first connection hole 40, the second connection hole 41, and the third connection hole.

[0057] Specifically, as shown in Figure 1, the top, bottom, left, and right of Figure 1 correspond to the top, bottom, left, and right of the circuit breaker, and the plane of Figure 1 corresponds to the front side of the circuit breaker. The upper wall of the circuit breaker housing 1 is provided with a switch-on button hole 110 and a switch-off button hole 111. The upper end of the switch-on button 20 is a switch-on button operating end that is slidably provided inside the switch-on button hole 110. The upper end of the switch-off button 21 is a switch-off button operating end that is slidably provided inside the switch-off button hole 111. The lower end of the switch-on button 20 is drivably connected to the first connection hole 40 at the right end of the transmission member 4 via a switch-on connecting rod 30, and the lower end of the switch-off button 21 is drivably connected to the second connection hole 41 at the left end of the transmission member 4 via a switch-off connecting rod 31. The third connection hole 42 at the right end of the transmission member 4 is drivably connected to the pull-off element 50 via the transmission connecting rod 32, and the transmission member 4 is pivotally mounted on the transmission member mounting shaft 104 of the circuit breaker housing 1 via the transmission member shaft hole 400. When the switch button 20 is pressed downward, the switch button 20 rotates the transmission member 4 clockwise (first direction) via the switch connecting rod 30, and at the same time, the transmission member 4 drives the movable contact 60 to swing clockwise via the transmission connecting rod 32, the locking pull-off element 50 and locking element 51, and the rotating plate 52, closing with the stationary contact 61, and the circuit breaker enters the switched-on state. When the switch-off button 21 is pressed downwards, the switch-off button 21 rotates the transmission member 4 counterclockwise (second direction) via the switch-off connecting rod 31. At the same time, the transmission member 4 drives the pull-off element 50 counterclockwise to swing via the transmission connecting rod 32. When the locking mechanism with the locking element 51 is released, the rotating plate 52 drives the movable contact 60 counterclockwise to swing, separating it from the stationary contact 61, and the circuit breaker enters the switched-off state.

[0058] Preferably, the switch-on button end and the switch-off button end are provided with a first indicator and a second indicator for identifying the switch-on / switch-off state, respectively, and both the first and second indicators have color indicators / symbol indicators. The first indicator is used to identify the switch-on state and the corresponding second indicator is used to identify the switch-off state, or the first indicator is used to identify the switch-off state and the second indicator is used to identify the switch-on state. Furthermore, the color indicators / symbol indicators of the switch-on button end and the switch-off button end are different. For example, the color indicator / symbol indicator of the switch-on button end may be red / switch-off (O), and the color indicator / symbol indicator of the switch-off button end may be green / switch-on (I). When the circuit breaker is switched on, the switch-on button end enters the switch-on button hole 110, and the switch-off button end is highlighted on the switch-off button hole 111, and the green and / or switch-on (I) indicator allows it to be determined that the circuit breaker is in the switched-on state. Conversely, when the circuit breaker is switched off, the switch-off button operating end enters the switch-off button hole 111, and the switch-on button operating end is highlighted above the switch-on button hole 110, and the red and / or switch-off (O) indicator allows the user to determine that the circuit breaker is in the switched-off state. The first and second indicators located at the switch-on and switch-off button operating ends help the user to observe and determine the state of the circuit breaker more intuitively and improve the user's electrical safety.

[0059] Preferably, as shown in Figures 3-5 and 7-9, both the switch-on button 20 and the switch-off button 21 of the circuit breaker of the present invention are rectangular in shape as a whole, the switch-on button 20 and the switch-off button 21 are arranged in parallel and mounted linearly slidably inside the circuit breaker housing 1, and further include a first track mechanism and a second track mechanism for defining the movement paths of the switch-on button 20 and the switch-off button 21, respectively.

[0060] Figure 3-5 shows a first embodiment of the first orbital mechanism and the second orbital mechanism.

[0061] As shown in Figure 3-5, the first track mechanism comprises a switch-on button track protrusion 201 provided on the switch-on button 20 and a switch-on button track groove 101 provided on the circuit breaker housing. The switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101, and the second track mechanism comprises a switch-off button track groove provided on the circuit breaker housing 1, with the switch-on button 21 slidably provided inside the switch-off button track groove. Also, as shown in Figure 3, the circuit breaker housing 1 has a first groove 105, and the switch-on button track groove 101 and the switch-off button track groove are located on both sides of the first groove 105. The switch-on button track groove 101 is formed by being surrounded by the first groove 105 and the side wall of the circuit breaker housing 1 facing the first groove 105. The circuit breaker housing 1 further has a second groove 102 opposite to the first groove 105, and the switch button track groove is formed surrounded by the first groove 105 and the second groove 102.

[0062] Preferably, as shown in Figure 4, the switch-on button 20 comprises a switch-on button operating section 202 and a switch-on button transmission section 203. One end of the switch-on button operating section 202 is the switch-on button operating end, and the other end is connected to the switch-on button transmission section 203 by overlapping it. The other end of the switch-on button transmission section 203 is provided with a switch-on button connection hole 204 and a switch-on button track protrusion 201. The switch-on button connection hole 204 is connected to one end of the switch-on connecting rod 30 of the operating mechanism, and the switch-on button track protrusion 201 and the switch-on button operating section 202 are located on the same side of the switch-on button transmission section 203. Specifically, as shown in Figure 4, the left end of the switch-on button operating section 202 is the switch-on button operating end, and its right end is connected to the left end of the switch-on button transmission section 203 by overlapping it. The right end of the switch button transmission section 203 is provided with a switch button connection hole 204 and a switch button track protrusion 201, and the switch button track protrusion 201 and the switch button operating section 202 are located below the switch button transmission section 203. Of course, the other end of the switch button operating section 202 may also be connected horizontally to the switch button transmission section 203, and instead of an overlapping connection structure, they may be located on the same plane.

[0063] Preferably, as shown in Figure 5, the switch-off button 21 comprises a switch-off button operating section 212 and a switch-off button transmission section 213. One end of the switch-off button operating section 212 is the switch-off button operating end, and the other end is connected to one end of the switch-off button transmission section 213. A switch-off button connection hole 214 is provided at the other end of the switch-off button transmission section 213, and the switch-off button connection hole 214 is connected to one end of the switch-off connecting rod 31 of the operating mechanism. Specifically, as shown in Figure 5, the overall shape of the switch-off button 21 is rectangular, the left end of the switch-off button operating section 212 is the switch-off button operating end, its right end is connected to the switch-off button transmission section 213, and a switch-off button connection hole 214 is provided at the right end of the switch-off button transmission section 213, and the switch-off button connection hole 214 is located below the switch-off button transmission section 213.

[0064] Specifically, as shown in Figure 3, the first groove 105 is provided in the circuit breaker housing 1 and is adjacent to the left side wall of the circuit breaker housing 1 to form a switch-on button track groove 101, and the second groove 102 is provided on the left side of the circuit breaker housing 1 and the two grooves adjacent to each other to form a switch-off button track groove. The switch-on button operating end is slidably provided inside the switch-on button hole 110, and at the same time, the switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101, defining the movement path of the switch-on button 20. The switch-off button operating end is slidably provided in the switch-off button hole 111, and at the same time, the switch-off button transmission part 213 is slidably provided between the first groove 105 and the second groove 102, defining the movement path of the switch-off button 21.

[0065] Figure 7-9 shows a second embodiment of the first and second track mechanisms. As shown in Figure 7-9, the first track mechanism comprises a switch-on button track protrusion 201 provided on the switch-on button 20 and a switch-on button track groove 101 provided on the circuit breaker housing 1. The switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101. The second track mechanism comprises a switch-off button track protrusion 205 provided on the switch-on button 20 and arranged along the longitudinal direction of the switch-on button 20, and a switch-off button track groove 2150 provided on the switch-off button 21. The switch-off button track groove 2150 slidably cooperates with the switch-off button track protrusion 205.

[0066] Preferably, as shown in Figure 8, the switch-on button 20 comprises a switch-on button operating section 202, a switch-on button transmission section 203, and a switch-off button track protrusion 205. One end of the switch-on button operating section 202 is the switch-on button operating section, and the other end is superimposed on and connected to one end of the switch-on button transmission section 203. The other end of the switch-on button transmission section 203 is provided with a switch-on button connection hole 204 and a switch-on button track protrusion 201, and the switch-off button track protrusion 205 is provided on one side of the switch-on button transmission section 203, and the switch-off button track protrusion 205 and the switch-on button operating section 202 are located on the same side of the switch-on button transmission section 203, and the switch-on button connection hole is connected to one end of the switch-on connecting rod 30 of the operating mechanism. Specifically, as shown in Figure 8, the upper end of the switch-on button operating section 202 is the switch-on button operating section, and its lower end is superimposed on and connected to the upper end of the switch-on button transmission section 203. The lower end of the switch-on button transmission section 203 is provided with a switch-on button connection hole 204 and a switch-on button track protrusion 201. The switch-off button track protrusion 205 is provided between the switch-on button operating section 202 and the switch-on button connection hole 204, and is located to the right of the switch-on button transmission section 203, connecting to the switch-on button operating section 202 and the switch-on button connection hole 204. The switch-off button track protrusion 201 is provided to the left of the switch-off button transmission section 203. Furthermore, as shown in Figure 8, a switch-on button bottom foot 206 is provided to the left of the upper end of the switch-on button transmission section 203.

[0067] Preferably, as shown in Figure 9, the switch-off button 21 comprises a switch-off button operating section 212, a switch-off button transmission section 213, a switch-off button track section 215, and a switch-off button connection hole 214. One end of the switch-off button operating section 212 is the switch-off button operating end, and the other end is connected to one end of the switch-off button transmission section 213. The other end of the switch-off button transmission section 213 is provided with a switch-off button connection hole 214, the switch-off button track section 215 is provided on one side of the switch-off button transmission section 213, and a switch-off button track groove 2150 is provided on one side of the switch-off button track section 215 facing the switch-off button transmission section 203. Specifically, as shown in Figure 9, the left end of the switch-off button operating section 212 is the switch-off button operating end, and its right end is connected to the left end of the switch-off button transmission section 213. A switch button connection hole 214 is provided at the right end of the switch button transmission section 213, the switch button track section 215 is provided to the right rear of the switch button transmission section 213, and a switch button track groove 2150 is provided on the underside of the switch button track section 215.

[0068] Specifically, as shown in Figure 7, the first track mechanism has a third groove 1010 provided in the circuit breaker housing 1, and a switch-on button track groove 101 is provided along the length of the third groove 1010. As shown in Figure 8, the switch-on button 20 further has a switch-on button bottom foot 206. The switch-on button bottom foot 206 is provided at one end of the switch-on button transmission part 203 connected to the switch-on button operating part 202, and together with the switch-on button operating part 202, it is located at both ends of the switch-on button transmission part 203. The switch-off button track protrusion 205 is located between the switch-on button operating part 202 and the switch-on button connection hole 204, and is connected to both of them. The operating end of the switch-on button is slidably provided inside the switch-on button hole 110, the bottom foot 206 of the switch-on button is slidably fitted with the third groove 1010, and the switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101, defining the movement path 20 of the switch-on button. The operating end of the switch-off button is slidably provided inside the switch-off button hole 111, the switch-off button track 215 is located on one side of the switch-on button operating part 203, and the switch-off button track groove 2150 is slidably fitted with the switch-off button track protrusion 205, defining the movement path of the switch-off button.

[0069] Preferably, as shown in Figure 10-24, the circuit breaker of the present invention further includes a locking mechanism provided inside the circuit breaker housing 1, and the locking design of the locking mechanism is one of the improvements of the present invention.

[0070] Preferably, as shown in Figures 10-17, the locking mechanism has a first locking member 1a with one end protruding to the outside of the circuit breaker housing 1. The circuit breaker housing 1 has a locking member opening 17 that engages with the first locking member 1a. One end of the first locking member 1a protrudes to the outside of the circuit breaker housing 1 through the locking member opening 17. When the circuit breaker is switched off, the first locking member 1a can be retracted inward into the circuit breaker housing 1 under the action of a retraction force. For example, when installing a circuit breaker in its assembly position, during the assembly process, the assembly position housing of the circuit breaker pushes the first locking piece 1a and moves it inward into the circuit breaker housing 1 (the assembly position housing applies a retracting external force to the first locking member 1a), thereby restricting the first locking member 1a from the switch-on button 20 and / or the switch-off button 21, locking the switch-on button 20 and / or the switch-off button 21 and preventing the circuit breaker from being switched on. After assembling the circuit breaker in the predetermined position, the locking member opening 17 corresponds to the assembly restriction hole of the assembly position housing, and the first locking member 1a protrudes again from the locking member opening 17 to the outside of the circuit breaker housing 1, and the restricting relationship with the switch-on button 20 and / or the switch-off button 21 is released. By releasing the locking of the button mechanism and restricting the first locking member 1a to the assembly restriction hole of the assembly position housing, the circuit breaker can be operated normally via the switch-on button 20 and / or the switch-off button 21, and it cannot be pulled out of the assembly position at will.

[0071] Furthermore, as shown in Figure 14-17, the switch-on button 20 and / or the switch-off button 21 have a button limiting groove 216 that restricts the movement of the first locking member 1a. The first locking member 1a has a first locking member limiting protrusion 14a that restricts the movement of the button limiting groove 216. When the circuit breaker is switched on, the button limiting groove 216 is misaligned with the first locking member limiting protrusion 14a, and the switch-on button 20 and / or the switch-off button 21 prevent the first locking member 1a from moving inward into the circuit breaker housing 1. When the circuit breaker is switched off, the button limiting groove 216 is positioned opposite the first locking member limiting protrusion 14a, and the first locking member 1a can move inward into the circuit breaker housing, causing the first locking member limiting protrusion 14a to slide into the button limiting groove 216.

[0072] Preferably, as shown in Figures 10-15, the switch-on button 20 is positioned parallel to the switch-off button 21 and is linearly slidable inside the circuit breaker housing 1, and the first locking member 1a is linearly movable inside the housing 6. The direction of movement of the switch-on button 20 and the switch-off button 21 is perpendicular to the direction of movement of the first locking member 1a. Furthermore, as shown in Figures 10-15, the locking mechanism further includes a first return spring 5a provided between the first locking member 1a and the circuit breaker housing 1. The first return spring 5a applies force to the first locking member 1a, keeping one end of the first locking member 1a protruding outside the circuit breaker housing 1 without interference from other external forces. When the circuit breaker is switched off, the first locking member 1a can be retracted inside the circuit breaker housing 1 under the action of a retraction force.

[0073] Specifically, as shown in Figures 14 and 15, the switch-on button 20 and the switch-off button 21 can move left and right, both moving synchronously in opposite directions, and the first locking member 1a can move up and down. As shown in Figure 14, when the circuit breaker is in the switched-on state, the button limiting groove 216 of the switch-off button 21 is misaligned with the first locking member limiting protrusion 14a of the first locking member 1a, and the first locking member 1a cannot move downward. As shown in Figure 15, when the circuit breaker is in the switched-off state, the button limiting groove 216 of the switch-off button 21 is positioned opposite the first locking member limiting protrusion 14a of the first locking member 1a, and the first locking member 1a can move downward, thereby sliding the first locking member limiting protrusion 14a into the button limiting groove and restricting the left and right movement of the switch-off button 21 and the switch-on button 20. As should be noted, the button limiting groove 216 may be provided on the switch-on button 20, as long as the button limiting groove 216 is misaligned with the first locking member limiting protrusion 14a when the circuit breaker is switched on, or it may be provided facing the first locking member limiting protrusion 14a when the circuit breaker is switched off.

[0074] Furthermore, as shown in Figures 14 and 15, the switch-on button 20 is positioned parallel to the switch-off button 21, and the switch-on button 20 and the first locking member 1a are positioned above the switch-off button 21, that is, the switch-on button 20 and the first locking member 1a are positioned between the switch-off button 21 and the locking member opening 17. The first locking member 1a is positioned on one side of the switch-on button 20, and the switch-off button 21 has a button limiting groove 216 that cooperates with the first locking member 1a in position limiting, and the first locking member 1a has a first locking member limiting protrusion 14a that cooperates with the button limiting groove 216. The switch-on button 20 is provided with a switch-on button avoidance groove 206 to avoid the first locking member limiting protrusion 14a of the first locking member 1a. When one end of the first locking member 1a protrudes outside the circuit breaker housing 1, the first locking member limiting protrusion 14a is located inside the switch button avoidance groove 206, and the width of the switch button avoidance groove 206 is sufficiently larger than the width of the first locking member limiting protrusion 14a in the direction of movement of the switch button 20. The switch button 20 does not come into contact with the first locking member limiting protrusion 14a during switch-on / switch-off operation, thereby moving the switch button 20 and the switch-off button 21 to switch the circuit breaker on / off. When the circuit breaker is in the switched-on state, the button limiting groove 216 is positioned offset from the first locking member limiting protrusion 14a, and the first locking member limiting protrusion 14a is located inside the switch button avoidance groove 206. The switch button 21 prevents the first locking member 1a from moving inside the circuit breaker housing 1. When the circuit breaker is switched off, the button limiting groove 216 is positioned opposite the first locking member limiting protrusion 14a, and the first locking member 1a can move inward into the circuit breaker housing 1 under the action of a retracting external force, thereby causing the first locking member limiting protrusion 14a to slide into the button limiting groove 216.

[0075] In this preferred embodiment, the switch-on button 20 and the first locking member 1a are arranged on the same plane and both are located above the switch-off button 21, making the structure more compact. The switch-on button 20 is provided with a switch-on button avoidance groove 206, which avoids the first locking member limiting protrusion 14a of the first locking member 1a, so that the switch-on or switch-off operation does not affect the movement of the switch-on button 20. In addition, the first locking member 1a approaches the switch-off button 21 firmly to release and lock, thereby shortening the travel distance of the first locking member 1a. The first locking member limiting protrusion 14a corresponds to the button limiting groove 216 of the switch-off button 21 when the switch is turned off, and the first locking member 1a is pushed inward into the circuit breaker housing 1. The first locking member limiting protrusion 14a is misaligned with the button limiting groove 216 of the switch off button 21 when the switch is turned on. Because the first locking member limiting protrusion 14a is restricted by the switch off button 21, the first locking member 1a is not pushed inward into the circuit breaker housing 1 and is not pulled out from the assembly position of the circuit breaker when the switch is turned on.

[0076] Preferably, as shown in Figures 10-13 and 18, the circuit breaker of the present invention further comprises a release mechanism drivably connected to the first locking member 1a. When the circuit breaker is switched off, operating the release mechanism moves the first locking member 1a inward into the circuit breaker housing 1, retracting it inside the circuit breaker housing 1, releasing the constraint between the assembly position housing and the constraint between the button mechanism 2. When the circuit breaker is switched on, the switch-on button 20 and / or the switch-off button 21 prevent the first locking member 1a from moving inward into the circuit breaker housing 1, ensuring that the lock cannot be released when the circuit breaker is switched on, thereby maintaining electrical safety.

[0077] Furthermore, as shown in Figure 10-13, the release mechanism includes an independent pulling member 2a that is drivably coupled with the first locking member 1a. When the circuit breaker is switched off, pulling the pulling member 2a moves the first locking member 1a inward into the circuit breaker housing 1, releasing the restrictive coupling between the first locking member 1a and the housing in its assembled position. Furthermore, as shown in Figure 10-13, the release mechanism includes an interlocking member 3a and a lever support portion 4a provided on the circuit breaker housing 1. One end of the interlocking member 3a is drivably connected to the first locking member 1a, the other end is drivably connected to the pulling member 2a, and its middle portion is in contact with the lever support portion 4a. When the pulling member 2a is pulled, the interlocking member 3a is rotated using the lever support 4a as a pivot point, causing the interlocking member 3a to drive the first locking member 1a to move inward into the circuit breaker housing 1 and release the constraint between the assembly position housing and the interlocking member 3a. In another embodiment, the release mechanism does not have a lever support 4a, and the interlocking member 3a is rotatably mounted inside the circuit breaker housing 1 by the combination of a waist-shaped hole provided in the interlocking member 3a and an interlocking member rotation shaft fixed to the circuit breaker housing 1, with one end cooperating with the pulling member 2a and the other end cooperating with the first locking member 1a. When the pulling member 2a is pulled, the connecting member 3a is rotated, causing the other end of the interlocking member 3a to act on the first locking member 1a and cause the first locking member 1a to retract inward into the circuit breaker housing 1.

[0078] Compared to existing circuit breakers that release the restriction alignment with the assembly position housing using a pull button, another improvement of the present invention is that the circuit breaker is provided with a separate pull member 2a of the release mechanism. Since a button mechanism is not used to release the first locking member, the situation in which the circuit breaker is accidentally pulled out by pulling the button is avoided. As should be noted, the independent pull member 2a of the present invention is applicable not only to the switch-on button 20 and switch-off button 21 solution of the present invention, but also to situations in which a single button performs both switch-on and switch-off operations.

[0079] It should be noted that in a modified embodiment, the first locking member 1a does not have a first locking member limiting protrusion 14a, and regardless of whether the circuit breaker is switched on or off, pulling the pulling member 2a drives the first locking member 1a to move it inside the circuit breaker housing 1.

[0080] Preferably, as shown in Figure 17, this is a first embodiment of the first locking member 1a.

[0081] As shown in Figure 17, the first locking member 1a comprises a first locking member body 10a, a first locking member blocking protrusion 11a, a first locking member limiting protrusion 14a, and a locking member spring limiting structure 15a. The first locking member blocking protrusion 11a and the first locking member limiting protrusion 14a are provided on both sides of the first locking member body 10a, respectively, and the locking member spring limiting structure 15a is positioned on one side of the first locking member body 10a that is away from the locking member opening 17. One end of the first locking member body 10a protrudes to the outside of the circuit breaker housing 1 from the locking member opening 17 provided in the circuit breaker housing 1, and the other end is connected to the first return spring 5a via the locking member spring limiting structure 15a. One end of the first return spring 5a is restricted with the locking member spring restriction structure 15a, and the other end is restricted with the circuit breaker housing 1. The first locking member blocking protrusion 11a is restricted with the circuit breaker housing 1, preventing the first locking member 1a from coming out of the locking member opening 17. Furthermore, as shown in Figure 17, the first locking member 1a further includes a first locking member passive part 130a that connects to the interlocking member 3a of the release mechanism. A first locking member connection hole 13a is provided in the middle of the first locking member passive part 130a, and one end of the interlocking member 3a is inserted inside the first locking member connection hole 13a. The first locking member passive part 130a is located on one side of the first locking member body 10a and is provided between the first locking member body 10a and the lever support 4a. Furthermore, as shown in the figure, the locking member spring limiting structure 15a becomes a spring limiting groove.

[0082] Preferably, Figure 16 shows a second embodiment of the first locking member 1a.

[0083] As shown in Figure 16, the first locking member 1a in this embodiment differs from that of the first embodiment in that it does not have a protruding first locking member passive portion 130a. Instead, one end of the first locking member body 10a protrudes to the outside of the circuit breaker housing 1, and the other end is provided with a first locking member connection hole 13a, which serves as the first locking member passive portion 130a. Also, as shown in Figure 17, the locking member spring limiting structure 15 is a spring limiting structure protrusion. Clearly, the first locking member 1a may have other similar structures as required.

[0084] Preferably, Figures 10, 11A, 11B, and 18 show multiple embodiments of the tensioning member 2a.

[0085] The pulling member 2a comprises a pulling member operating section 20a, a first transition section 21a of the pulling member, and a pulling member drive section 24a. The pulling member operating section 20a is vertically connected to the first transition section 21a of the pulling member, and the pulling member drive section 24a is diagonally connected to the first transition section 21a of the pulling member. The pulling member operating section 20a constitutes an operating section convenient for pulling by hand or with a tool, the first transition section 21a of the pulling member constitutes a sliding support parallel to the direction of movement of the pulling member 2a, and the pulling member drive section 24a is provided diagonally to drive the interlocking member 3a to return the first locking member 1a to the inside of the circuit breaker housing 1. In another embodiment, the pulling member 2a comprises only a pulling member operating section 20a, a first transition section 21a of the pulling member, and a pulling member drive section 24a. In this case, the tensioning member 2a forms a roughly Z-shaped or U-shaped structure, but the Z-shaped structure occupies a relatively large space, and the sliding combination between the U-shaped structure and the locking mechanism is unstable.

[0086] Furthermore, in a preferred embodiment, as shown in Figure 11A, the tension member 2a includes a second transition portion 22a of the tension member connected between a first transition portion 21a of the tension member and a tension member drive portion 24a. The second transition portion 22a of the tension member is parallel to the tension member operating portion 20a and perpendicular to the first transition portion 21a of the tension member, and both the second transition portion 22a of the tension member and the tension member operating portion 20a are located on one side of the first transition portion 21a of the tension member and form a U-shaped structure. By bending the tension member 2a to reduce the space it occupies and pulling the second transition portion 22a of the tension member, the circuit breaker can be pulled out and the position of the tension member 2a can be restricted. The tension member drive portion 24a moves away from the tension member operating portion 20a and bends at an angle to one side of the first transition portion 21a of the tension member.

[0087] Furthermore, in a preferred embodiment, as shown in Figure 11B, the tension member 2a includes a third transition portion 23a of the tension member connected between a first transition portion 21a of the tension member and a tension member drive portion 24a. The third transition portion 23a of the tension member is positioned parallel to the first transition portion 21a of the tension member and is used to balance the sliding of the tension member 2a and to adjust the position of the tension member drive portion 24a. And / or, the tension member 2a includes a tension member holding portion 25a connected to the tension member drive portion 24a. The tension member holding portion 25a is positioned parallel to the first transition portion 21a of the tension member. After the tension member drive portion 24a tilts and gradually drives the interlocking member 3a to retract the first locking member 1a into the circuit breaker housing 1, the tension member holding portion 25a holds the first locking member 1a in the retracted position via the interlocking member 3a.

[0088] In a preferred embodiment of the tension member 2a, as shown in Figure 18, the tension member 2a comprises a tension member operating section 20a, a first transition section 21a, a second transition section 22a, a third transition section 23a, a tension member drive section 24a, and a tension member holding section 25a, all connected in sequence. The tension member operating section 20a is positioned parallel to the second transition section 22a, the first transition section 21a and the third transition section 23a are positioned parallel to the tension member holding section 25a and perpendicular to the tension member operating section 20a. The tension member drive section 24a is positioned at an angle. One end of the drive section is bent and connected to the third transition section 23a, and the other end is bent and connected to the tension member holding section 25a, which is the second end of the drive section. The first end of the drive unit is set away from the first locking member 1a relative to the second end of the drive unit. Furthermore, the tension member 2a is integrally formed by die forging or bending a metal material.

[0089] Preferably, as shown in Figures 10-13, the circuit breaker housing 1 includes a tension member limiting reinforcement 6a provided between the tension member operating section 20a and the second transition section 22a of the tension member. The tension member 2a is pulled to return the first locking member 1a to the inside of the circuit breaker housing 1, releasing the restriction between the housing and the assembly position. Then, the tension member 2a is continued to restrict its position with the tension member limiting reinforcement 6a, and the circuit breaker is pulled out from the assembly position.

[0090] Specifically, as shown in Figures 10, 11A, and 11B, the right end of the first locking member 1a protrudes outside the circuit breaker housing 1, and its left end is connected to the right end of the interlocking member 3a and connected to the circuit breaker via the first return spring 5a. The middle portion of the interlocking member 3a is in contact with a lever support 4a provided above the first locking member 1a, and its left end is movably connected to the pulling member drive unit 24a. The upper and lower ends of the pulling member drive unit 24a are the first and second ends of the drive unit, respectively. When the circuit breaker is switched off, the pulling member 2a is pulled upward until the pulling member drive unit 24a contacts the left end of the interlocking member 3a (as shown in Figure 12). As shown in Figure 13, by continuously pulling the pulling member 2a and rotating the interlocking member 3a clockwise around the lever support 4a as a pivot point, the right end of the interlocking member 3a moves the first locking member 1a to the left and completely returns the right end of the first locking member 1a to the inside of the circuit breaker housing 1, thereby restricting its position with the button mechanism 2. Thus, the restricting position between the first locking member 1a and the assembled housing is released, and the restricting position between the pulling member holding part 25a and the interlocking member 3a is formed, thereby holding the first locking member 1a inside the circuit breaker housing 1.

[0091] Preferably, as shown in Figure 11A, the pulling member 2a is made of a metallic magnetic material, and the release mechanism further comprises a pulling member retaining magnet provided inside the circuit breaker housing 1 and cooperating with the pulling member operating part 20a. The retaining magnet is provided in a groove 105 on the circuit breaker housing 1 and cooperates with the pulling member operating part 20a in a magnetically absorbable manner. The pulling member retaining magnet securely holds the pulling member operating part 20 inside the circuit breaker housing, protecting the clean and beautiful appearance of the circuit breaker when there is no need to operate the pulling member 2a, and preventing the pulling member 2a from unexpectedly protruding from the circuit breaker housing 1, which could cause malfunction or damage to the pulling member 2a. Furthermore, when the pulling member 2a is pulled out to a predetermined position, the second transition part 22a of the pulling member also cooperates with the pulling member retaining magnet in a magnetically absorbable manner, thereby holding the pulling member in the pulled-out position outside the circuit breaker housing 1.

[0092] Furthermore, it should be noted that "cooperating in a magnetically absorbable manner" means that the tension member operating part 20a is attracted under the action of the tension member holding magnet. The fact that the tension member 2a is made of a metallic magnetic material does not necessarily mean that it is a magnet itself, as it is magnetically absorbed by the tension member holding magnet.

[0093] Preferably, as shown in Figures 1, 19, 20, and 25, the circuit breaker housing 1 includes an output wire hole 112 and a pull member operation hole 113. The output wire hole 112, the pull member operation hole 113, the switch-on button hole 110, and the switch-off button hole 111 are located on the same side wall of the circuit breaker housing 1. The circuit breaker housing 1 further includes a pull member removal groove 16, and the pull member operation portion 20a of the pull member 2a is provided inside the pull member operation hole 113, so that the pull member 2a does not protrude from the circuit breaker housing 1 when it is not pulled out. The pull member removal groove 16 is in communication with the pull member operation hole 113, and the pulling operation is performed via the pull member removal groove 16.

[0094] Furthermore, as a preferred solution, the pull member removal groove 16 is provided between the output wire hole 112 and the pull member operation hole 113, and is obstructed by the output wire. Both ends of the pull member removal groove 16 communicate with the output wire hole 112 and the pull member operation hole 113, respectively. As soon as the output wire is disconnected, the pull member operation part 20a is drilled through the pull member removal groove 16 from the pull member operation hole 113. Alternatively, as another preferred solution, the pull member removal groove 16 is provided between the switch-off button hole 111 and the pull member operation hole 113. When the circuit breaker is switched on, the switch-off button 21 obstructs the pull member removal groove 16. When the circuit breaker is switched off, the switch button 21 moves inward into the circuit breaker housing 1, avoiding the pull member removal groove 16, so that the pull member operating part 20a is drilled through the pull member operating hole 113 in the pull member removal groove 16. When the output wire is disconnected, the pull member can be pulled out simply by keeping the circuit breaker switched off. The above structure ensures that the release mechanism can release the restrictive combination between the first locking member 1a and the assembly position housing simply by keeping the circuit breaker switched off. By pulling the pull member 2a while the circuit breaker is switched on, it is prevented from damaging the pull member 2a or pulling out the circuit breaker due to static electricity, thus protecting the electrical safety of the user.

[0095] Preferably, in another embodiment of the tension member, as shown in Figure 11B, the tension member 2a includes a tension member spring limiter 26a. The tension member spring limiter 26a is positioned parallel to the tension member operating portion 20a and is located at both ends of the tension member 2a. The release mechanism further includes a tension member return spring 7a provided between the tension member spring limiter 26a and the tension member limiter 6a. The tension member return spring 7a firmly holds the tension member operating portion 20a of the tension member 2a inside the circuit breaker housing. The tension member spring limiter 26a is bent and connected to the tension member operating portion 20a.

[0096] Furthermore, as shown in Figures 10-13, the tensioning member 2a is positioned along the thickness direction of the circuit breaker, overlapping the switch-on button 20 and the switch-off button 21 to save space. The direction of movement of the tensioning member 2a is parallel to the direction of movement of the switch-on button 20 and the switch-off button 21, and perpendicular to the direction of movement of the first locking member 1a, which moves along the width direction of the circuit breaker. The first transition portion 21a of the tensioning member 2a moves toward the side wall of the locking member opening 17 provided in the circuit breaker housing 1. The first transition portion 21a slides restricted between the tensioning member limiting bar 6a and the lever support 4a along the direction of movement, and is restricted by one end of the tensioning member limiting bar 6a and the circuit breaker housing 1 along the direction of vertical movement. The first transition portion 21a and the first locking member 1a are each positioned on either side of the lever support 4a, and the interlocking member 3a is located between the first locking member 1a and the lever support 4a. The tensioning member 2a, the interlocking member 3a, and the first locking member 1a are all positioned along the thickness direction of the circuit breaker, overlapping the switch-on button 20 and the switch-off button 21, and are located above the switch-on button 20 and the switch-off button 21. The first locking member limiting protrusion 14a of the first locking member 1a extends inward into the switch-on button avoidance groove 206 of the switch-on button 20.

[0097] Preferably, the interlocking member 3a is a Z-shaped or U-shaped pull rod, with one end inserted into the first locking member 1a and the other end extending to the sliding position of the pull member drive unit 24a of the pull member 2a. The interlocking member 3a has a relatively simple mounting structure, with the lever support 4a acting as a pivot point to return the first locking member 1a to the inside of the shut-off housing 1, and the lever support 4a also has the function of restricting the first locking member and supporting the interlocking member 3a.

[0098] Preferably, as shown in Figure 21-24, the locking mechanism further comprises a second locking member 1b.

[0099] As shown in Figure 21-24, the second locking member 1b is pivotably mounted on the circuit breaker housing 1 and has a second locking end 13b. When the circuit breaker is switched on, the switch-on button 20 or the switch-off button 21 rotates the second locking member 1b (rotates in the second direction), causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1. When the circuit breaker is switched off, the switch-on button 20 or the switch-off button 21 rotates the second locking member 1b (rotates in the first direction), causing the second locking end 13b to retract to the inside of the circuit breaker housing 1.

[0100] Furthermore, in the solution shown in Figures 22-24, the switch-on button 20 has a switch-on button drive unit 207 that drives in conjunction with the second locking member 1b, and the switch-off button 21 has a switch-off button drive unit 217 that drives in conjunction with the second locking member 1b. As shown in Figure 24, when the circuit breaker is switched on, the switch-off button 21 rotates the second locking member 1b via the switch-off button drive unit 217, causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1, and the release button drive unit 217 supports the second locking end 13b, preventing it from returning to the inside of the circuit breaker housing 1. As shown in Figure 22, when the circuit breaker is switched off, the switch-on button 20 rotates the second locking member 1b via the switch-on button drive unit 207, causing the second locking end 13b to retract inward into the circuit breaker housing 1, and the switch-on button drive unit 207 restricts the second locking end 13b, thereby holding it inside the circuit breaker housing 1. As shown in Figure 24, when the circuit breaker is switched on, the switch-off button 21 rotates the second locking member 1b counterclockwise (rotates in the second direction), causing the second locking end 13b to protrude outward from the circuit breaker housing 1. As shown in Figure 22, when the circuit breaker is switched off, the switch-on button 22 rotates the second locking member 1b clockwise (rotates in the first direction), causing the second locking end 13b to retract inward into the circuit breaker housing 1.

[0101] Preferably, as shown in Figure 22-24, the second locking member 1b comprises a second locking member mounting portion 10b pivotably connected to the circuit breaker housing 1, a first passive portion 11b of the locking member that drives in conjunction with the switch-off button 21, a second passive portion 12b of the locking member that drives in conjunction with the switch-on button 20, and a second locking end 13b. When the circuit breaker is switched on, the switch-off button 21 rotates the second locking member 1b via the first passive portion 11b of the locking member, causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1. When the circuit breaker is switched off, the switch-on button 20 rotates the second locking member 1b via the second passive portion 12b of the locking member, causing the second locking end 13b to retract to the outside of the circuit breaker housing 1. In this embodiment, the first passive portion 11b and the second locking end 13b are two separate ends, but in another embodiment, the first passive portion 11b and the second locking end 13b may be the same end. Also, as shown in Figures 22 and 24, the first passive portion 11b of the locking member has a first passive projection 110b of the locking member that protrudes from one side of the switch-off button 21, and the second passive portion 12b of the locking member has a second receiving projection 120b of the locking member that protrudes from one side of the switch-on button 20. The first passive projection 110b and the second receiving projection 120b of the locking member are located on the same side of the second locking member 1b. When the circuit breaker is switched on, one side of the switch-off button drive unit 217 rotates the second locking member 1b via the first passive part 11b of the locking member, causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1. When the circuit breaker is switched off, one side of the switch-on button drive unit 207 rotates the second locking member 1b via the second passive part 12b of the locking member, causing the second locking end 13b to retract to the outside of the circuit breaker housing 1.

[0102] Furthermore, as shown in Figure 22-24, the switch-on button drive unit 207 has a switch-on button drive slope 2070 that engages with the second passive projection 120b of the locking member, and the switch-off button drive unit 217 has a switch-off button drive slope 21700 that engages with the first passive projection 110b of the locking member. The inclination direction of the switch-on button drive slope 2070 is opposite to the inclination direction of the switch-off button drive slope 21700, and the first passive projection 110b and the second passive projection 120b of the locking member are located between the switch-off button drive slope 21700 and the switch-off button drive slope 21700.

[0103] When the switch-on button 20 is pressed to switch on the circuit breaker, the switch-on button drive slope 2070 moves inward with the switch-on button 20 to avoid the second locking member 1b, while the switch-off button drive slope 21700 moves outward with the switch-off button 21 to rotate the second locking member 1b via the first passive projection 110b of the locking member. The second locking end 13b protrudes outward from the circuit breaker housing 1, and the drive slope 21700 supports the first passive projection 110b of the locking member, preventing the second locking member 1b from returning to the inside of the circuit breaker housing 1.

[0104] When the switch-off button 21 is pressed to switch off the circuit breaker, the switch-off button drive slope 21700 moves inward with the switch-off button 21 to avoid the second locking member 1b. At the same time, the switch-on button drive slope 2070 moves outward with the switch-on button 20 to press the second passive projection 120b of the locking member, causing the second locking end 13b to retract inward with the circuit breaker housing 1, and restricting the second locking member 1b to hold it inside the circuit breaker housing 1. Furthermore, as shown in Figures 22 and 23, the switch-on button drive slope 2070 is formed by the switch-on button drive projection provided on the switch-on button 20, and the switch-off button drive slope 21700 is formed by the switch-off button drive groove provided on the switch-off button 21. When the circuit breaker is in the off position, the switch-on button drive slope 2070 and the switch-off button drive slope 21700 form a funnel-shaped structure.

[0105] Preferably, as shown in Figures 22-24, the switch-off button drive unit 217 comprises a first protruding stage 2170 of the switch-off button drive unit provided on one side of the switch-off button 21, and a second protruding stage 2171 of the switch-off button drive unit provided on one side of the first protruding stage 2170 that moves away from the switch-off button 21. The first protruding stage 2170 of the switch-off button drive unit has a triangular structure as a whole, and the second protruding stage 2171 of the switch-off button drive unit is positioned at one corner of the triangular structure that approaches the switch-on button 20.

[0106] Furthermore, as shown in Figures 22 and 24, the second locking member 1b has a substantially H-shaped structure. The second locking member mounting portion 10b and the first locking member receiving portion 11b are located at one end of the second locking member 1b and constitute one side of the H-shaped structure. The second receiving portion 12b and the second locking end 13b of the locking member are located at the other end of the second locking member 1b and constitute the other side of the H-shaped structure.

[0107] Furthermore, as shown in Figures 3, 21-24, the second locking member 1b is positioned overlapping the switch-on button 20 and the switch-off button 21 along the thickness direction of the circuit breaker to save space. In the thickness direction of the circuit breaker, the second locking member 11b is located above the switch-on button 20 and the switch-off button 21, and the tension member 2a is located above the second locking member 11b. The first locking member 1a is located above the second locking end 13b of the second locking member 11b, and one end of the first locking member 1a and the second locking end 13b share a large locking member opening 17, although of course, it is also possible for two independent locking member openings to share. In the direction of movement of the switch-on button 20 and the switch-off button 21, the first locking member 1a is closer to the inside of the circuit breaker housing 1 than the second locking member 11b.

[0108] Figure 25 shows one embodiment of the circuit breaker housing 1.

[0109] As shown in Figure 25, the circuit breaker housing 1 has a hexahedral structure as a whole, comprising a front wall 1001 and a rear wall 1002 facing each other, an output wire hole 112, button holes 110-111 and a pull member operation hole 113 provided in the front wall 1001, and an input wire hole 14 provided in the rear wall 1002.

[0110] Preferably, as shown in Figure 25, the button holes 110-111 comprise an adjacent switch-on button hole 110 and a switch-off button hole 111. Furthermore, the switch-on button operating end of the switch-on button 20 and the switch-off button operating end of the switch-off button 21 are slidably positioned inside the switch-on button hole 110 and the switch-off button hole 111, respectively, and do not protrude from the front wall 1001 of the circuit breaker housing 1 at all times. This prevents situations in which the circuit breaker is switched on or off by accidentally touching the switch-on button operating end / switch-off button operating end, thereby protecting the stability and safety of the user's power consumption.

[0111] Preferably, as shown in Figure 25, the button holes 110-111 and the pull member operation hole 113 are provided at one end of the front wall 1001, one output wire hole 112 is provided at the other end of the front wall and becomes the first output wire hole, and the other output wire hole 112 is provided between the first output wire hole and the button holes 110-111 and becomes the second output wire hole. The button holes 110-111 and the second output wire hole are located on the same side of the pull member operation hole 113. Furthermore, as shown in Figure 19, the circuit breaker housing 1 has a pull member removal groove 16 provided in the front wall 1001. The pull member removal groove 16 is provided between the second output wire hole and the pull member operation hole 113, and both ends there communicate with the second output wire hole and the pull member operation hole 113, respectively. The output wire inserted into the second output wire hole blocks the pull member removal groove 16. Alternatively, as shown in Figure 20, the pull member removal groove 16 is provided between the switch-off button hole 111 and the pull member operation hole 113. When the circuit breaker is switched on, the switch-off button 21 of the circuit breaker obstructs the pull member removal groove 16.

[0112] Preferably, the circuit breaker housing 1 further includes a wire removal hole 1120 provided in the front wall 1001 and a communication hole 15 provided in the rear wall 1002, as shown in Figure 25. The wire removal hole 1120 corresponds one-to-one with the output wire holes 112, and the communication hole 15 is located between the two input wire holes 14.

[0113] Preferably, as shown in Figure 25, the circuit breaker housing 1 further comprises a third side wall 1003 and a fourth side wall 1004, which are provided opposite to each other, and a fifth side wall 1005 and a sixth side wall 1006, which are provided opposite to each other. The third side wall 1003, the fourth side wall 1004, the fifth side wall 1005, and the sixth side wall 1006 are all located between the front side wall 1001 and the rear side wall 1002. Also, as shown in Figure 25, a locking member opening 17 is provided at one end of the third side wall 1003 that approaches the front side wall 1001.

[0114] As described above, the present invention will be described in detail in combination with certain preferred embodiments, but it should not be considered that the specific embodiments of the present invention are limited to these descriptions. Those skilled in the art can make several simple inferences or substitutions without departing from the concept of the present invention, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A circuit breaker comprising a circuit breaker housing (1), a button mechanism (2) provided inside the circuit breaker housing (1), and an operating mechanism connected to the button mechanism (2), wherein the circuit breaker housing (1) has a switch-on button hole (110) and a switch-off button hole (111) provided thereon, the button mechanism (2) comprises a switch-on button (20) and a switch-off button (21) respectively slidably provided inside the circuit breaker housing (1), the switch-on button (20) has a switch-on button operating end provided at one end thereof and slidably provided inside the switch-on button hole (110), and the switch-off button (21) has a switch-off button operating end provided at one end thereof and slidably provided inside the switch-off button hole (111); The switch-on button operation end is pressed toward the inside of the circuit breaker housing (1) to drive the operation mechanism and switch on the circuit breaker, and at the same time, the switch-off button operation end moves to the outside of the circuit breaker housing (1); the switch-off button operation end is pressed toward the inside of the circuit breaker housing (1) to drive the operation mechanism and switch off the circuit breaker, and at the same time, the switch-on button operation end moves to the outside of the circuit breaker housing (1); The circuit breaker further has a locking mechanism that mates with the button mechanism (2), the locking mechanism having a first locking member (1a) having one end protruding outside the circuit breaker housing (1), the circuit breaker housing (1) having a locking member opening (17) that mates with the first locking member (1a); When the circuit breaker is in a switched-off state, the first locking member (1a) protrudes from the locking member opening (17) to the outside of the circuit breaker housing (1) and returns to the inside of the circuit breaker housing (1) under the action of a retracting external force; A circuit breaker, characterized in that, when the circuit breaker is in a switched-on state, the first locking member (1a) protrudes outside the circuit breaker housing (1) and is restricted in position by the switch-on button (20) and / or the cut button (21) and cannot return to the inside of the circuit breaker housing (1).

2. The operating mechanism includes a connecting rod mechanism, a transmission member (4) pivotally mounted on the circuit breaker housing (1), and a lever mechanism. The connecting rod mechanism includes a switch-on connecting rod (30), a switch-off connecting rod (31), and a transmission connecting rod (32). The other end of the switch-on button (20) is drivably connected to the transmission member (4) via the switch-off connecting rod (30). The other end of the switch-off button (21) is drivably connected to the transmission member (4) via the switch-off connecting rod (31). The transmission member (4) is drivably connected to the lever mechanism via the transmission connecting rod (32). The lever mechanism is connected to a movable contact (60) of the circuit breaker. When the switch-on button (20) is pressed toward the inside of the circuit breaker housing (1) to switch on the circuit breaker, the switch-on button ( 2. The circuit breaker according to claim 1, wherein the switch-on connecting rod (30) drives the transmission member (4) to rotate in a first direction, and the transmission member (4) drives the switch-off button (21) to move outside the circuit breaker housing (1) through the switch-off connecting rod (31); when the switch-off button (21) is pressed inside the circuit breaker housing (1) to switch off the circuit breaker, the switch-off button (21) drives the transmission member (4) to rotate in a second direction through the switch-off connecting rod (31), and the transmission member (4) drives the switch-on button (20) to move outside the circuit breaker housing (1) through the switch-on connecting rod (30), and the first direction and the second direction are opposite to each other.

3. The transmission member (4) has a transmission member axial hole (400), a first connection hole (40), a second connection hole (41) and a third connection hole (42), the first connection hole (41), the second connection hole (41) and the third connection hole (42) are respectively located at the three vertices of a triangle, the transmission member axial hole (400) is located in the middle of the transmission member (4), the transmission member (4) is pivotally mounted on the circuit breaker housing (1) via the transmission member axial hole (400), and the transmission member (4) is connected to the switch-on connecting rod (30), the switch-off connecting rod (31) and the transmission connecting rod (32) via the first connection hole (40), the second connection hole (41) and the third connection hole (42); 3. The circuit breaker according to claim 2, wherein the lever mechanism comprises a locking element (51), a pull-off element (50), and a rotating plate (52) pivotally mounted on the circuit breaker housing (1), the locking element (51) engages with the pull-off element (50) and is pivotally mounted on the rotating plate (52), the rotating plate (52) is connected to the movable contact (60), and the transmission member (4) is drivably connected to the pull-off element (50) via the transmission connecting rod (32).

4. 2. The circuit breaker according to claim 1, characterized in that the circuit breaker comprises a first track mechanism and a second track mechanism for defining the movement paths of the switch on button (20) and the switch off button (21), respectively.

5. 5. The circuit breaker according to claim 4, wherein the first track mechanism comprises a switch-on button track protrusion (201) provided on the switch-on button (20) and a switch-on button track groove (101) provided on the circuit breaker housing (1), the switch-on button track protrusion (201) being slidably provided inside the switch-on button track groove (101), and the second track mechanism comprises a switch-off button track groove provided on the circuit breaker housing (1), and the switch-off button (21) is slidably provided inside the switch-off button track groove.

6. 5. The circuit breaker according to claim 4, wherein the first track mechanism comprises a switch-on button track protrusion (201) provided on the switch-on button (20) and a switch-on button track groove (101) provided on the circuit breaker housing (1), the switch-on button track protrusion (201) being slidably provided inside the switch-on button track groove (101), and the second track mechanism comprises a switch-off button track protrusion (205) provided on the switch-on button (20) and arranged along the length direction of the switch-on button (20) and a switch-off button track groove (2150) provided on the switch-off button (21), the switch-off button track groove (2150) slidably cooperating with the switch-off button track protrusion (205).

7. The circuit breaker further comprises an unlocking mechanism drivably connected to the first locking member (1a); 2. The circuit breaker according to claim 1, characterized in that, when the circuit breaker is in a switched-off state, the first locking member (1a) is returned to the inside of the circuit breaker housing (1) by operating the locking release mechanism.

8. After the first locking member (1a) returns to the inside of the circuit breaker, it engages with the switch-on button (20) and / or the switch-off button (21) in a restrictive manner, so that the switch-on button (20) and / or the switch-off button (21) cannot switch on the circuit breaker; The switch-on button (20) and / or the switch-off button (21) have a button limiting groove (216) that fits in a limited engagement with the first fastening member (1a), and the first fastening member (1a) has a first fastening member limiting protrusion (14a) that fits in a limited engagement with the button limiting groove (216), 2. The circuit breaker according to claim 1, characterized in that, when the circuit breaker is in a switched-on state, the button limiting groove (216) is misaligned with the first locking member limiting protrusion (14a), and the switch-on button (20) and / or the switch-off button (21) prevent the first locking member (1a) from moving inwardly into the circuit breaker housing (1); and, when the circuit breaker is in a switched-off state, the button limiting groove (216) is disposed opposite to the first locking member limiting protrusion (14a), and the first locking member (1a) can move inwardly into the circuit breaker housing (1) under the action of a retracting external force, so that the first locking member limiting protrusion (14a) slides into the button limiting groove (216) and locks the switch-on button (20) and / or the switch-off button (21).

9. the switch-on button (20) is arranged in parallel with the switch-off button (21) and is linearly slidably mounted inside the circuit breaker housing (1); the first locking member (1a) is linearly movable inside the housing (6); the moving directions of the switch-on button (20) and the switch-off button (21) are perpendicular to the moving direction of the first locking member (1a); 2. The circuit breaker according to claim 1, wherein the locking mechanism further comprises a first return spring (5a) provided between the first locking member (1a) and the circuit breaker housing (1), and the first return spring (5a) applies a force to the first locking member (1a) to cause one end of the first locking member (1a) to protrude outside the circuit breaker housing (1).

10. the switch-on button (20) and the first locking member (1a) are located between the switch-off button (21) and the locking member opening (17), the first locking member (1a) is located on one side of the switch-on button (20), the switch-off button (21) has a button limiting groove (216) that cooperates with the first locking member (1a) to limit its position, the first locking member (1a) has a first locking member limiting protrusion (14a) that cooperates with the button limiting groove (216), and the switch-on button (20) is provided with a switch-on button avoiding groove (206) for avoiding the first locking member limiting protrusion (14a) of the first locking member (1a); When one end of the first locking member (1a) protrudes outside the circuit breaker housing (1), the first locking member limiting protrusion (14a) is located inside the switch-on button avoiding groove (206), and the width of the switch-on button avoiding groove (206) becomes sufficiently larger than the width of the first locking member limiting protrusion (14a) in the moving direction of the switch-on button (20), thereby moving the switch-on button (20) and the switch-off button (21) to switch on / off the circuit breaker, 10. The circuit breaker according to claim 9, characterized in that, when the circuit breaker is in a switched-on state, the button limiting groove (216) is arranged in a position offset from the first locking member limiting protrusion (14a), and the first locking member limiting protrusion (14a) is located inside the switch-on button avoiding groove (206), and the switch-off button (21) prevents the first locking member (1a) from moving toward the inside of the circuit breaker housing (1); and, when the circuit breaker is in a switched-off state, the button limiting groove (216) is arranged opposite to the first locking member limiting protrusion (14a), and the first locking member (1a) can move toward the inside of the circuit breaker housing (1) under the action of a retracting external force, thereby causing the first locking member limiting protrusion (14a) to slide into the button limiting groove (216).

11. The circuit breaker further comprises a locking mechanism mated with the button mechanism (2), the locking mechanism comprising a second locking member (1b) pivotally mounted on the circuit breaker housing (1), the second locking member (1b) comprising a second locking end (13b); The switch-on button (20) is pressed to drive the operating mechanism to switch on the circuit breaker, and at the same time, the switch-off button (21) is moved to the outside of the circuit breaker housing (1), and the switch-on button (20) and / or the switch-off button (21) rotate the second locking member (1b) to cause the second locking end (13b) to protrude outside the circuit breaker housing (1), and the second locking member (1b) engages the switch-on button (20) and / or the switch-off button (21).

2. The circuit breaker according to claim 1, characterized in that the second engaging end (13b) cannot return to the inside of the circuit breaker housing (1) due to the restriction imposed by the switch-off button (21), and when the switch-off button (21) is pressed to drive the operating mechanism and switch off the circuit breaker, the switch-on button (20) is moved to the outside of the circuit breaker housing (1), and the switch-on button (20) and / or the switch-off button (21) drive the second engaging member (1b) to rotate in the reverse direction, thereby causing the second engaging end (13b) to return to the inside of the circuit breaker housing (1).

12. The switch-on button (20) has a switch-on button drive part (207) which drives and engages with the second locking member (1b), and the switch-off button (21) has a switch-off button drive part (217) which drives and engages with the second locking member (1b). When the circuit breaker is turned on, the switch-off button (21) rotates the second locking member (1b) via the switch-off button drive part (217) to cause the second locking end (13b) to protrude outside the circuit breaker housing (1), and the release button drive part (217) rotates the second locking member (1b) to cause the second locking end (13b) to protrude outside the circuit breaker housing (1).

12. The circuit breaker according to claim 11, characterized in that when the circuit breaker is switched off, the switch-on button (20) rotates the second locking member (1 b) via the switch-on button drive unit (207) to return the second locking end (13 b) to the inside of the circuit breaker housing (1) by supporting it, and when the circuit breaker is switched off, the switch-on button drive unit (207) restricts the second locking end (13 b) to hold the second locking end (13 b) inside the circuit breaker housing (1).

13. The second locking member (1b) includes a second locking member mounting portion (10b) pivotally connected to the circuit breaker housing (1), a first passive portion (11b) of the locking member that drives and engages with the switch-off button (21), a second passive portion (12b) of the locking member that drives and engages with the switch-on button (20), and a second locking end (13b). When the circuit breaker is switched on, the switch-off button (21) is engaged with the locking portion (10b). When the circuit breaker is switched off, the switch-on button (20) rotates the second locking member (1b) via a first passive part (11b) of the locking member, thereby causing the second locking end (13b) to protrude outside the circuit breaker housing (1), and when the circuit breaker is switched off, the switch-on button (20) rotates the second locking member (1b) via a second passive part (12b) of the locking member, thereby causing the second locking end (13b) to return inside the circuit breaker housing (1); 13. The circuit breaker according to claim 12, wherein the second engaging member (1b) is arranged to overlap the switch-on button (20) and the switch-off button (21) along the thickness direction of the circuit breaker.

14. The first passive portion (11b) of the locking member has a first passive projection (110b) of the locking member protruding on one side of the switch-off button (21), and the second passive portion (12b) of the locking member has a second passive projection (120b) of the locking member protruding on one side of the switch-on button (20); The switch-on button driving part (207) has a switch-on button driving slope (2070) which drives and engages with the second passive protrusion (120b) of the locking member, the switch-off button driving part (21700) which drives and engages with the first passive protrusion (110b) of the locking member, the inclination direction of the switch-on button driving slope (2070) is opposite to the inclination direction of the switch-off button driving slope (21700), the first passive protrusion (110b) of the locking member and the second passive protrusion (120b) of the locking member are located between the switch-off button driving slope (21700) and the switch-on button driving slope (2070), When the switch-on button (20) is pressed to switch on the circuit breaker, the switch-on button drive slope (2070) moves inwardly of the circuit breaker housing (1) along with the switch-on button (20) to avoid the second locking member (1b), and at the same time, the switch-off button drive slope (21700) moves outwardly of the circuit breaker housing (1) along with the switch-off button (21), rotating the second locking member (1b) via the first passive protrusion (110b) of the locking member, thereby causing the second locking end (13b) to protrude outwardly of the circuit breaker housing (1), and the switch-off button drive slope (21700) supports the first passive protrusion (110b) of the locking member to prevent the second locking member (1b) from returning to the inside of the circuit breaker housing (1); The circuit breaker according to claim 13, characterized in that, when the switch-off button (21) is pressed to switch off the circuit breaker, the switch-off button drive ramp (21700) moves along with the switch-off button (21) toward the inside of the circuit breaker housing (1) to avoid the second locking member (1b), and at the same time, the switch-on button drive ramp (2070) moves along with the switch-on button (20) toward the outside of the circuit breaker housing (1) to press the second passive protrusion (120b) of the locking member to return the second locking end (13b) to the inside of the circuit breaker housing (1) and restrict the second locking member (1b) to hold it inside the circuit breaker housing (1).

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