Circuit Breakers

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 end side electrical appliances, in particular to circuit breakers. [Background technology]

[0002] Although the widespread use of circuit breakers has effectively improved the safety of electrical equipment, in order to keep up with the trend of miniaturization of electrical equipment, the overall configuration and operation mode of circuit breakers must also be continually improved and refined to meet the trend of development. After thoroughly examining the prior art, it is found that the existing circuit breakers have the following defects:

[0003] 1. Existing circuit breakers have many independent switch-on / off indicator structures to indicate the switch-on / off switching state of the circuit breaker circuit, which makes the internal structure of the circuit breaker complicated and increases the overall volume. Furthermore, the buttons of the operating mechanism protrude far from the outside of the circuit breaker housing, which makes it easy for the circuit breaker to be operated erroneously due to miscontact, affecting the stability and safety of power consumption.

[0004] 2. Existing plug-in type circuit breakers generally have two kinds of locking mechanisms, one of which prevents the circuit breaker from being switched on without being installed in place, and the other of which prevents the circuit breaker from being inserted or pulled out of the cabinet in the switched-on state, so that both structures are complicated and take up a lot of the inner space of the circuit breaker.

[0005] 3. Existing plug-in type circuit breakers usually pull the button to pull the circuit breaker out of its installed position. When a user pulls or pushes the circuit breaker to turn it off, the operating force cannot be grasped. Therefore, the circuit breaker is pulled out of its installed position too much, which affects the stability and safety of the user's power consumption.

[0006] 4. The existing plug-in circuit breaker housing has an irrational design and the openings on its outer shell are scattered, which makes it inconvenient to install the circuit breaker. Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to overcome the drawbacks of the prior art and provide a circuit breaker, which is provided with an on button and a off button corresponding to on and off operation, respectively, so that the on / off state of the circuit breaker can be determined from the state of the two buttons, and the on button operating end and the off button operating end are provided in the off button hole and the off button hole, respectively, so that the erroneous operation of the circuit breaker due to erroneous contact can be prevented. [Means for solving the problem]

[0008] In order to achieve the above object, the solution of the present invention is as follows.

[0009] The circuit breaker includes 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. The circuit breaker housing 1 includes a switch-on button hole 110 and a switch-off button hole 111 provided thereon, and the button mechanism 2 includes a switch-on button 20 and a switch-off button hole 111 provided slidably inside the circuit breaker housing 1. RiboThe switch-on button 20 has an operating end provided at one end thereof and slidably arranged inside the switch-on button hole 110, and the switch-off button 21 has an operating end provided at one end thereof and slidably arranged inside the switch-off button hole 111.

[0010] The circuit breaker presses the switch-on button operating end toward the inside of the circuit breaker housing 1 to drive the operating mechanism and switch the circuit breaker on, and at the same time, the switch-off button operating end moves to the outside of the circuit breaker housing 1, and presses the switch-off button operating end toward the inside of the circuit breaker housing 1 to drive the operating mechanism and switch the circuit breaker off, and at the same time, the switch-on button operating end moves to the outside of the circuit breaker housing 1.

[0011] Preferably, the operating mechanism comprises a connecting rod mechanism, a transmission member 4 pivotally mounted on the circuit breaker housing 1, and a lever mechanism, 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 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, and the lever mechanism is connected to a movable contact 60 of the circuit breaker, and 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 20 drives the transmission member 4 via the switch-on connecting rod 30. When the switch-off button 21 is pressed toward the inside of 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, and at the same time, the transmission member 4 drives the switch-on button 20 through the switch-on connecting rod 30 to move to the outside of the circuit breaker housing 1, and the first direction and the second direction are opposite to each other.

[0012] Preferably, the transmission member 4 includes 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, the transmission member shaft hole 400 is located at the middle of the transmission member 4, the transmission member 4 is pivotally mounted on the circuit breaker housing 1 through the transmission member shaft 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 through the first connection hole 40, the second connection hole 41, and the third connection hole 42, The lever mechanism includes 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.

[0013] Preferably, 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.

[0014] Preferably, the first track mechanism includes 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, and the switch-on button track protrusion 201 is slidably provided inside the switch-on button track groove 101, and the second track mechanism includes a switch-off button track groove provided on the circuit breaker housing 1, Switch off 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, 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 longitudinal direction of the switch-on button 20, and a switch-off button track groove 2150 provided on the switch-off button 21, and the switch-off button track groove 2150 slidably cooperates with the switch-off button track protrusion 205.

[0016] Preferably, the circuit breaker further comprises 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; When the circuit breaker is in the 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.

[0017] Preferably, the circuit breaker further comprises an unlocking mechanism drivably connected to the first locking member 1a; 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.

[0018] Preferably, the first locking member 1a, after returning to the inside of the circuit breaker, engages with the switch-on button 20 and / or the switch-off button 21 in a limited engagement, 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 locking member 1a, and the first locking member 1a has a first locking member limiting protrusion 14a that fits in a limited engagement with the button limiting groove 216, 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; when the circuit breaker is in a switched-off state, the button limiting groove 216 is disposed opposite 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.

[0019] Preferably, the switch-on button 20 is arranged parallel to the switch-off button 21 and is linearly slidably mounted inside the circuit breaker housing 1, the first locking member 1a is linearly movably mounted inside the housing 6, and the moving direction of the switch-on button 20 and the switch-off button 21 is perpendicular to the moving direction of the first locking member 1a; The locking mechanism further includes a first return spring 5a arranged between the first locking member 1a and the circuit breaker housing 1, and the first return spring 5a applies an acting force to the first locking member 1a, causing one end of the first locking member 1a to protrude outside 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 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, When the circuit breaker is in a switched-on state, the button limiting groove 216 is positioned out of alignment with 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, so that the switch-on button 20 prevents the first locking member 1a from moving toward the inside of the circuit breaker housing 1; when the circuit breaker is in a switched-off state, the button limiting groove 216 is positioned opposite 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, so that the first locking member limiting protrusion 14a slides into the button limiting groove 216.

[0021] Preferably, 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; By pressing the switch-on button 20 to drive 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, causing the second locking end 13b to protrude 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 to drive 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 to rotate it in the reverse direction, causing the second locking end 13b to return to the inside of the circuit breaker housing 1.

[0022] Preferably, the switch-on button 20 has a switch-on button driving part 207 which drives and engages with the second locking member 1b, and the switch-off button 21 has a switch-off button driving 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 driving part 217 to make the second locking end 13b protrude outside the circuit breaker housing 1, and the open button driving part 21 7 supports the second locking end 13b, thereby preventing the second locking end 13b from returning to the inside of 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 the switch-on button drive unit 207, thereby causing the second locking end 13b to return to the inside of the circuit breaker housing 1, and the switch-on button drive unit 207 restricts the second locking end 13b, thereby holding the second locking end 13b 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 a locking member that drives and engages with the switch-off button 21, a second passive portion 12b of a 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 rotates the second locking member 1b via the first passive portion 11b of the locking member to cause 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 the second passive portion 12b of the locking member to cause the second locking end 13b to protrude outside the circuit breaker housing 1. Inside Return to The second locking member 1b is disposed so as 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 part 11b of the locking member has a first passive projection 110b of the locking member protruding from one side of the switch-off button 21, and the second passive part 12b of the locking member has a second passive projection 120b of the locking member protruding from 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, and the switch-off button driving part 217 has a switch-off button driving slope 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, and the first passive protrusion 110b of the locking member and the second passive protrusion 120b of the locking member are in front of the switch-off button driving slope 21700. Switch on button drive slope 2070 Located between When the switch-on button 20 is pressed to switch on the circuit breaker, the switch-on button driving slope 2070 moves toward the inside 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 driving slope 21700 moves toward the outside of the circuit breaker housing 1 along with the switch-off button 21, and rotates the second locking member 1b via the first passive protrusion 110b of the locking member, thereby causing the second locking end 13b to protrude outside the circuit breaker housing 1, and 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 the switch-off button 21 is pressed to switch off the circuit breaker, the switch-off button driving slope 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 driving slope 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, causing the second locking end 13b to return to the inside of the circuit breaker housing 1, and restricting 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 a switch-on button and a switch-off button, so that the user can press the switch-on button and the switch-off button respectively to switch on / off the circuit breaker, and the moving direction 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 toward the inside of the circuit breaker housing to switch on / off the circuit breaker, the switch-on button / switch-off button moves toward the outside of the circuit breaker housing. That is, the user can determine the state (switch-on / switch-off state) of the circuit breaker by observing the state of the switch-on button / switch-off button. Firstly, compared with the existing circuit breaker which uses a pull / push mechanism to switch on / off the circuit breaker, the circuit breaker of the present invention can achieve the switch-on / switch-off operation of the circuit breaker by pressing the button, which avoids the situation of accidentally unplugging the circuit breaker. Secondly, since the state of the circuit breaker can be determined by observing the states of the on and off buttons, there is no need to set up separate on and off indicators, which simplifies the structure of the circuit breaker, saves the internal space of the circuit breaker, and is favorable to the trend toward smaller circuit breakers. Thirdly, the operating ends of the on and off buttons are respectively disposed inside the on and off button holes and do not protrude from the circuit breaker housing, which avoids erroneous operation of the circuit breaker due to erroneous contact.

[0026] Also, the first locking member retracts into the inside of the circuit breaker housing under the action of a retracting external force to lock the switch-on button and / or the switch-off button, preventing the circuit breaker from being switched on. Therefore, when the plug-in 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 presses the first locking member to move toward the inside of the circuit breaker housing and locks the switch-on button and / or the switch-off button, thereby preventing the plug-in circuit breaker from still being turned on without being installed in the designated position while being installed, and protecting the personal safety of the user. Also, when the circuit breaker is in a switched-on state, the switch-on button and / or the switch-off button prevent the first locking member from moving toward the inside of the circuit breaker housing. Therefore, the plug-in type circuit breaker of the present invention, once switched on, cannot be installed in the circuit breaker assembly position, thereby ensuring that the circuit breaker can be installed in the circuit breaker assembly position in the switched-off state, as well as ensuring that the circuit breaker cannot be pulled out of the circuit breaker assembly position in the switched-on state, thereby protecting the personal safety of the user.

[0027] In addition, the second locking end of the second locking member protrudes / retracts outside / inside the circuit breaker housing in the on / off state of the circuit breaker, thereby avoiding the situation where the circuit breaker is installed in the assembly position of the circuit breaker in the on state or pulled out from the assembly position of the circuit breaker in the on state, thereby ensuring the electrical safety and personal safety of the user. Furthermore, 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 the user can press the switch-on button and the switch-off button respectively to switch on / off the circuit breaker, and the moving direction 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 toward the inside of the circuit breaker housing to switch on / off the circuit breaker, the switch-on button / switch-off button moves toward the outside of the circuit breaker housing. That is, the user can determine the state (on / off state) of the circuit breaker by observing the state of the switch-on button / switch-off button. [Brief description of the drawings]

[0028] [Figure 1] 1 is a schematic structural diagram of a circuit breaker according to the present invention, showing at least the structure of an operating mechanism. [Diagram 2] FIG. 2 is an enlarged schematic view of part A of FIG. 1 according to the present invention. [Diagram 3] 1 is an exploded view of a circuit breaker structure of the present invention showing at least a first track mechanism and a first embodiment of a second track mechanism; [Figure 4] FIG. 2 is a schematic structural diagram of a first embodiment of the switch-on button of the present invention; [Diagram 5] FIG. 2 is a schematic structural diagram of a first embodiment of the switch-off button of the present invention; [Figure 6] 1 is a schematic structural diagram of a transmission member according to the present invention; [Figure 7] FIG. 2 is a schematic structural view of a circuit breaker housing according to the present invention, showing at least a second embodiment of a first track mechanism; [Figure 8]FIG. 4 is a schematic structural diagram of a second embodiment of the switch-on button of the present invention; [Figure 9] FIG. 4 is a schematic structural diagram of a second embodiment of the switch-off button of the present invention; [Figure 10] 4 is a schematic diagram of an assembly structure of a tension member and a first locking member of the present invention. FIG. [Figure 11A] FIG. 2 is a schematic diagram of an assembly structure of a pulling member and a first locking member of the present invention, in which a pulling member holding magnet provided in a circuit breaker housing cooperates with a pulling member operating portion of the pulling member in a magnetically absorbable manner. [Figure 11B] FIG. 2 is a schematic diagram of an assembly structure of a tension member and a 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 bar of the tension member; [Figure 12] FIG. 2 is a schematic diagram of an assembly structure of a pulling member and a first locking member of the present invention, in which the pulling member driver moves the first locking member toward the inside of the circuit breaker housing via an interlocking member. [Figure 13] FIG. 2 is a schematic diagram of an assembly structure of the pulling member and the first locking member of the present invention, in which the entire first locking member enters inside the circuit breaker housing and continues to pull the pulling member to pull the circuit breaker out of the assembled position of the circuit breaker. [Figure 14] FIG. 2 is a schematic diagram of the combination of the first locking member and the button mechanism of the present invention, where the circuit breaker is in a switched-on state and the switch-off button prevents the first locking member from moving inwardly into the circuit breaker housing. [Figure 15] FIG. 1 is a schematic diagram of the combination of the first locking member and the button mechanism of the present invention, in which the circuit breaker is in a switched-off state, the button limiting groove of the switch-off button faces the first locking member limiting protrusion, and the first locking member can move toward the inside of the circuit breaker housing. [Figure 16] 1 is a schematic structural diagram of a first embodiment of a first fastening member of the present invention; [Figure 17] FIG. 4 is a schematic structural diagram of a second embodiment of the first fastening member of the present invention. [Figure 18] FIG. 2 is a schematic structural diagram of a tension member of the present invention; [Figure 19] FIG. 2 is a schematic structural diagram of a circuit breaker housing of the present invention, in which a tension member extraction groove is provided between the second output line hole and the tension member operation hole. [Figure 20] FIG. 2 is a schematic structural diagram of a circuit breaker housing according to the present invention, in which a tension member removal groove is provided between a switch-off button hole and a tension member operation hole. [Figure 21] 4 is a schematic diagram showing an assembly structure of a second locking member of the present invention. FIG. [Figure 22] FIG. 1 is a schematic diagram of the combination of the second locking member and button mechanism of the present invention, where the circuit breaker is in a switched-off state and the switch-on button rotates the second locking member, causing it to retract inside the circuit breaker housing. [Diagram 23] FIG. 2 is a schematic structural diagram of the switch-on button and the 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] FIG. 1 is a schematic diagram of the combination of the second locking member and the button mechanism of the present invention, in which the circuit breaker is in a switched-on state and the switch-off button rotates the second locking member, causing the second locking member to protrude outside the circuit breaker housing. [Diagram 25] 1 is a schematic structural diagram of a circuit breaker housing according to the present invention, showing the positional relationship between a button hole, an output line hole, a line removal hole, and a tension member operation hole. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The specific implementation of the plug-in type circuit breaker of the present invention will be further described below in conjunction with the embodiment shown in Figures 1-25. The plug-in type circuit breaker of the present invention is not limited to the following description.

[0030] 1, the circuit breaker of the present invention, particularly the plug-in type circuit breaker, includes 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, and the movable contact 60 is caused to close / separate from the stationary contact 61.

[0031] Of course, as required, as shown in Fig. 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 respectively drive the operating mechanism to trip the circuit breaker when a short circuit or overload fault occurs in the circuit breaker, thus achieving the basic circuit protection function. The arc extinguishing system 8 is used to extinguish an arc generated when the moving contact 60 is separated from the stationary contact 61, which is advantageous to improving the interruption performance of the circuit breaker and improving the safety of power consumption.

[0032] As shown in Figures 1 to 3, 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 includes a switch-on button 20 and a switch-off button hole 111 that are slidably provided inside the circuit breaker housing 1. Ribo The switch-on button 20 has a switch-on button operating end provided at one end thereof and slidably disposed inside a switch-on button hole 110. The switch-off button 21 has a switch-off button operating end provided at one end thereof and slidably disposed inside a switch-off button hole 111. When the switch-on button operating end / switch-off button operating end is pressed toward the inside of the circuit breaker housing 1 to drive the operating mechanism to switch on / off the circuit breaker, the corresponding switch-off button operating end / switch-on button operating end moves to the outside of the circuit breaker housing 1.

[0033] 1 and 2, the operating mechanism includes a connecting rod mechanism, a transmission member 4 pivotally provided inside 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, 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 a movable contact 60 of the circuit breaker. When the on button 20 is pressed to turn on the circuit breaker, the on button 20 drives the transmission member 4 to rotate in a first direction via the on connecting rod 30, and the rotation of the transmission member 4 drives the off button 21 to move out of the circuit breaker housing 1 via the off connecting rod 31. When the off button 21 is pressed to turn off the circuit breaker, the off button 21 drives the transmission member 4 to rotate in a second direction via the off connecting rod 31, and the rotation of the transmission member 4 drives the on button 20 to move out of the circuit breaker housing 1 via the on connecting rod 30. The first and second directions are opposite to each other. Here, the function of the transmission member 4 is very similar to the handle of a conventional small circuit breaker. The on button 20 and the off button 21 are interlocked with the transmission member 4 via connecting rods, and the connecting rod mechanism may adopt existing solutions such as four connecting rods or multiple connecting rods.

[0034] In the circuit breaker of the present invention, one improvement is that the button mechanism 2 comprises an on button 20 and a off button 21. In addition to the user pressing the on button 20 / off button 21 respectively to switch on / off the circuit breaker, the moving direction of the on button 20 is opposite to that of the off button 21, that is, the on button 20 / off button 21 is pressed toward the inside of the circuit breaker housing 1 to switch on / off the circuit breaker, and at the same time, the corresponding off button 21 / on button 20 moves toward the outside of the circuit breaker housing 1. That is, the user can determine the state (on / off state) of the circuit breaker by observing the state of the on button 20 / off button 21. Firstly, compared with the existing circuit breaker using a pull / push mechanism to switch on / off the circuit breaker, the circuit breaker of the present invention achieves the on / off operation of the circuit breaker by pressing the button, which avoids the situation of accidentally unplugging the circuit breaker. Secondly, since the state of the circuit breaker can be determined by observing the states of the switch-on button 20 and the switch-off button 21, there is no need to set up separate switch-on and switch-off indicators, which simplifies the structure of the circuit breaker, saves the internal space of the circuit breaker and is in keeping with the trend towards miniaturization of circuit breakers.

[0035] Preferably, as shown in Fig. 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 Fig. 10-18, the locking mechanism has a first locking member 1a with one end protruding outside the circuit breaker housing 1, and also provides a locking member opening 17 for accommodating the locking mechanism in the circuit breaker housing 1, and provides an assembly limiting hole 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 circuit breaker corresponds to the assembly limiting hole. If the plug-in circuit breaker is not assembled in a predetermined position, the locking member opening 17 of the plug-in circuit breaker is misaligned with the assembly limiting hole, and the assembly position housing blocks the locking member opening 17. The above belongs to the prior art in this field, so it 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 in a switched-off state, one end of the first member 1a protrudes from the locking member opening 17 and protrudes outside the circuit breaker housing 1, and the first locking member 1a can retract inside the circuit breaker housing 1 under the action of a retracting external force. In addition, the first locking member 1a cooperates with the switch-on button 20 and / or the switch-off button 21 in a position limiting manner, and locks 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 in a switched-on state, one end of the first locking member 1a protrudes outside the circuit breaker housing 1 and is limited in position by the switch-on button 20 and / or the switch-off button 21, and cannot retract inside the circuit breaker housing 1. When 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, in which case the switch-on button 20 and / or the switch-off button 21 can perform normal switch-on / switch-off operation.

[0037] Preferably, as shown in Figures 10-17, when the circuit breaker is in a switched-on state before the circuit breaker is mounted in the assembled 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 cut button 21, so that it cannot be retracted inside the circuit breaker housing 1. This makes it impossible to insert the circuit breaker into the assembled position of the circuit breaker in the switched-on state.

[0038] When the circuit breaker is mounted in the circuit breaker assembly position, the assembly position housing in the circuit breaker assembly position applies a retracting external force to the first locking member 1a during the assembly process, pushing the first locking member 1a to move toward the inside of the circuit breaker housing 1 and retract into the inside of the circuit breaker housing 1. Also, the first locking member 1a cooperates with the switch-on button 20 and / or the switch-off button 21 in a position limiting manner, locking the switch-on button 20 and / or the switch-off button 21 to prevent the circuit breaker from being switched on, and the inability to switch on the circuit breaker during the assembly process enhances safety.

[0039] After the circuit breaker is assembled in a predetermined position, the locking member opening 17 corresponds to the assembly limiting hole, and the assembly position housing does not apply a retracting external force to the first locking member 1a, so that the first locking member 1a protrudes again to the outside of the circuit breaker housing 1. By releasing the button mechanism 2 to make the first locking member 1a cooperate with the assembly position housing in the limiting position, the circuit breaker can perform normal switch-on / switch-off operation via the switch-on button 20 and / or switch-off button 21, but cannot be freely pulled out from the assembly position, ensuring that the circuit breaker is not dislodged from the assembly position of the circuit breaker due to vibration during transportation.

[0040] After the circuit breaker is assembled in position, when the circuit breaker is in the switched-on state, 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, preventing the circuit breaker from being pulled out of the assembled position in the switched-on state.

[0041] Further, as shown in Figures 10-13 and 18, when the circuit breaker is in a switched-off state, the release mechanism is operated to drive the first locking member 1a to move toward the inside of the circuit breaker housing 1, causing it to retract from the inside of the circuit breaker housing 1, releasing the restrictive engagement between the first locking member 1a and the assembly position housing, and cooperating with the button mechanism 2 to restrict the position.

[0042] The locking mechanism of the circuit breaker of the present invention cooperates with the switch-on button 20 and / or the switch-off button 21, so that when the circuit breaker is mounted in the assembly position, the first locking member 1a of the locking mechanism locks the switch-on button 20 and / or the switch-off button 21, preventing the circuit breaker from being turned on due to erroneous operation / contact by the user during the installation of the circuit breaker, and protecting the personal safety of the user. Also, when the circuit breaker is in the switched-on state, 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. That is, once the circuit breaker is switched on, it cannot be mounted in the circuit breaker mounting position or withdrawn from the circuit breaker mounting position at will. Thus, it is ensured that the circuit breaker is mounted in the circuit breaker mounting position or withdrawn from the circuit breaker mounting position in the switched-off state, and protecting the personal safety of the user.

[0043] As should be pointed out, the "lock / release button mechanism 2" executes / releases the restrictive combination with the button mechanism 2 via the first locking member 1a, thereby preventing / allowing the switch-on button 20 and / or switch-off button 21 to move in the designed direction (i.e., the switch-on direction / switch-off direction).

[0044] After the circuit breaker is mounted on the circuit breaker assembly position and assembled in a predetermined position, the first locking member 1a cooperates with the assembly position housing of the circuit breaker assembly position to limit the position. The release mechanism has an independent pulling member 2a drivably cooperating with the first locking member 1a. When the circuit breaker is in a switched-off state, the pulling member 2a is pulled to drive the first locking member 1a to move toward the inside of the circuit breaker housing 1 and retract into the inside of the circuit breaker housing 1, thereby releasing the first locking member 1a from the limiting engagement with the mounting position housing and allowing the circuit breaker to be pulled out from the mounting position of the circuit breaker. In addition, as shown in Figures 10-13, the release mechanism further has an interlocking member 3a, one end of which drivably cooperates with the first locking member 1a and the other end of which drivably cooperates with the pulling member 2a. The pulling member 2a is pulled to rotate the interlocking member 3a, which moves the first locking member 1a toward the inside of the circuit breaker housing 1, retracts it into the inside of the circuit breaker housing 1, and releases the limited combination with the assembly position housing. Compared with the existing circuit breaker that releases the limited combination with the assembly position housing by a pulling button, another improvement of the present invention is that the circuit breaker is provided with the pulling member 2a of the release mechanism alone. Since no button mechanism is used to release the first locking member, the situation of pulling the button and pulling out the circuit breaker by mistake is avoided. In addition, in the release mechanism of the present invention, the pulling member 2a drivably cooperates with the first locking member 1a via the interlocking member 3a, thereby improving the fault tolerance of the release mechanism and lowering the requirements for the structural accuracy of the pulling member 2a, the interlocking member 3a, and the first locking member 1a, thereby reducing the difficulty of manufacturing and favoring the improvement of manufacturing efficiency.

[0045] Preferably, as shown in Fig. 21-24, the locking mechanism has a second locking member 1b pivotally provided 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 to drive 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. The switch-on button 20 and / or the switch-off button 21 rotate the second locking member 1b, causing the second locking end 13b to protrude to the outside of the circuit breaker housing 1. Also, the second locking member 1b cannot be retracted inside the circuit breaker housing 1 because 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 activate the operating mechanism and switch off the circuit breaker, and at the same time the switch-on button 20 is moved outside the circuit breaker housing 1, the switch-on button 20 and / or the switch-off button 21 drives the second locking member 1b to rotate in the reverse direction, thereby retracting the second locking end 13b into the inside of the circuit breaker housing 1.

[0046] 22 and 24, when the circuit breaker is switched on, the switch-off button 21 rotatably drives the second locking member 1b, so that the second locking end 13b protrudes outside the circuit breaker housing 1. When the circuit breaker is switched off, the switch-on button 20 rotatably drives the second locking member 1b, so that the second locking end 13b retracts inside 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 outside the circuit breaker housing 1, and when the circuit breaker is switched off, the switch-off button 21 drives the second locking end 13b to retract inside the circuit breaker housing 1. In the circuit breaker of the present invention, the locking mechanism further comprises the second locking member 1b. When the circuit breaker is switched on, the second locking end 13b of the second locking member 1b protrudes outside the circuit breaker housing 1, thereby preventing the circuit breaker from being mounted in the circuit breaker assembly position in the switched-on state or being pulled out of the circuit breaker assembly position in the switched-on state, thereby ensuring the electrical safety 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 the same or different functions and can coexist to improve the electrical safety of the circuit breaker. Of course, there is also the possibility of providing only the first locking member 1a or the second locking member 1b. If the first locking member 1a and the second locking member 1b are provided at the same time, when the circuit breaker is switched on outside the assembly position of the circuit breaker, both the first locking member 1a and the second locking member 1b will protrude from the circuit breaker housing, and the circuit breaker cannot be installed in the assembly position of the circuit breaker. When the circuit breaker is installed in the assembly position of the circuit breaker and not installed in place, the first locking member 1a will be pushed back into the circuit breaker housing by the assembly position housing, preventing the switch-on button from switching on. When the circuit breaker is mounted in the circuit breaker assembly position and switched on after being mounted in a predetermined position, both the first locking member 1a and the second locking member 1b protrude from the circuit breaker housing and cannot be unlocked or pulled out from the circuit breaker assembly position. When the circuit breaker is mounted in the circuit breaker assembly position and then switched off, the second locking member 1b retracts inside the circuit breaker housing 1 and the first locking member 1a still protrudes from the circuit breaker housing, preventing the circuit breaker from coming out of the circuit breaker assembly position due to vibration in situations such as transportation. When the circuit breaker is mounted in the circuit breaker assembly position and then switched off, the pulling member 2a is pulled outward and the first locking member 1a is pulled back inside the circuit breaker housing by the pulling member 2a, thereby releasing the lock. The first locking member 1a is continued to be pulled to move the circuit breaker and pull it out of the cabinet.

[0048] Preferably, shown in Figures 19, 20 and 25 is one embodiment of a circuit breaker housing 1.

[0049] The entire circuit breaker housing 1 has a hexahedral structure, and includes a front wall 1001 and a rear wall 1002, which are provided opposite to each other, an output line hole 112, button holes 110-111, and a pulling member operation hole 113 provided in the front wall 1001, and an input line hole 14 provided in the rear wall 1002. The output line holes 112, button holes 110-111, and pulling member operation hole 113 of the circuit breaker housing 1 are gathered in the front wall 1001, which allows for easier operation. The input line hole 14 is provided in the rear wall 1002 opposite to the front wall 1001 to increase the creepage distance between the input line end and the output line end, which is advantageous for improving the insulation performance of the circuit breaker. In addition, as shown in FIG. 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 switch-on and switch-off buttons for the circuit breaker, thereby achieving the switch-on / switch-off operation of the circuit breaker through various structures. Compared with the existing circuit breaker that uses a pull / push mechanism to switch-on / switch-off the circuit breaker, the circuit breaker is prevented from being pulled out with excessive force when the button is pulled to switch off the circuit breaker.

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

[0051] As shown in Fig. 1-3, the circuit breaker of the present embodiment is a plug-in type circuit breaker, and includes 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 cooperating 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 Fig. 1, the circuit breaker of the present invention further includes 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 the operating mechanism to trip the circuit breaker, respectively, when a short circuit or overload fault occurs in the circuit breaker, thereby achieving a basic circuit protection function. The arc-extinguishing system 8 is used to extinguish an arc generated when the movable contact 60 is separated from the stationary contact 61, which is advantageous to improve the interrupting performance of the circuit breaker and improve 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, which 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 includes a side wall of the arc-extinguishing chamber and a plurality of arc-extinguishing thin plates provided between the side walls of the arc-extinguishing chamber.

[0052] Preferably, shown in Figures 1-9 is one embodiment of the operating mechanism.

[0053] 1 and 2, the circuit breaker housing 1 has a switch-on button hole 110 and a switch-off button hole 111 provided therein. The button mechanism 2 has 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 is provided at one end thereof and has a switch-on button operating end slidably provided inside the switch-on button hole 110, and the switch-off button 21 is provided at one end thereof and has a switch-off button operating end slidably provided inside the switch-off button hole 111. When the switch-on button operating end / switch-off button operating end are pressed inside the circuit breaker housing 1 to cause the circuit breaker to perform a switch-on / switch-off operation, the switch-on button operating end / switch-off button operating end move to the outside of the circuit breaker housing 1.

[0054] 1 and 2, the operating mechanism includes a connecting rod mechanism, a transmission member 4 pivotally provided on the circuit breaker housing 1, and a lever mechanism, and 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, 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 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 20 rotatably drives the transmission member 4 in a first direction via the switch-on connecting rod 30, and 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 switch-off button 21 is pressed toward the inside of the circuit breaker housing 1 to switch off the circuit breaker, the switch-off button 21 rotatably drives the transmission member 4 in a second direction via the switch-off connecting rod 31, and 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 direction and the second direction are opposite to each other.

[0055] 1 and 2, the lever mechanism includes a locking element 51, a pull-off element 50, and a rotating plate 52. The rotating plate 52 is pivotally mounted on the circuit breaker housing 1, and the locking element 51 is engaged with the pull-off element 50 and rotatably mounted on the rotating plate 52. The rotating plate 52 is connected with the movable contact 60, and the transmission member 4 is drivably connected with the pull-off element 50 via the transmission connecting rod 32. The transmission member 4 rotates in a first direction, and drivably rotates the lever mechanism as a whole in the first direction via the transmission connecting rod 32. The lever mechanism swings the movable contact 60, and achieves the switching-on operation of the circuit breaker. The transmission member 4 rotates in a second direction, and rotates the pull-off element 50 in the second direction via the transmission connecting rod 32, and releases the engagement between the pull-off element 50 and the locking element 51, and achieves the switching-off operation of the circuit breaker. When a short circuit or overload fault occurs in the circuit breaker, the short circuit protection mechanism 7 or the overload protection mechanism activates the locking element 51 to release the locking combination between the pull-off element 50 and the locking element 51, and pulls off the circuit breaker for protection. And the movable contact 60 connects to the rotating plate 52 through the elastic member, and the overtravel of the movable contact 60 is reached. Of course, the connecting rod mechanism may adopt other solutions, all of which are within the protection scope of the present invention. Preferably, what is shown in Fig. 6 is one embodiment of the transmission member 4.

[0056] 6, the transmission member 4 includes a transmission member axial hole 400, a first connecting hole 40, a second connecting hole 41, and a third connecting hole 42. The first connecting hole 41, the second connecting hole 41, and the third connecting hole 42 are located at the three vertices of a triangle, respectively, and the transmission member axial hole 400 is located in the middle of the transmission member 4. The first connecting hole 40 and the third connecting hole 42 are located on one side of the transmission member axial hole 400, and the second connecting hole 41 is located on the other side of the transmission member axial hole 400. The transmission member 4 is pivotally mounted on the circuit breaker housing 1 through 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 through the first connecting hole 40, the second connecting hole 41, and the third connecting hole.

[0057] Specifically, as shown in Fig. 1, the top, bottom, left and right of Fig. 1 correspond to the top, bottom, left and right of the circuit breaker, and the paper surface of Fig. 1 corresponds to the front side of the circuit breaker. A switch-on button hole 110 and a switch-off button hole 111 are provided on the upper wall of the circuit breaker housing 1, and the upper end of the switch-on button 20 is an operation end of the switch-on button slidably provided inside the switch-on button hole 110. The upper end of the switch-off button 21 is an operation end of the switch-off button slidably provided inside the switch-off button hole 111. The lower end of the switch-on button 20 is drivably connected to the first connecting hole 40 at the right end of the transmission member 4 via the switch-on connecting rod 30, and the lower end of the switch-off button 21 is drivably connected to the second connecting hole 41 at the left end of the transmission member 4 via the 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-on button 20 is pressed downward, the switch-on button 20 rotates the transmission member 4 clockwise (first direction) via the switch-on 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 pull-off element 50 and the locking element 51 which are engaged with each other, and the rotating plate 52 to close with the stationary contact 61, and the circuit breaker enters the switched-on state. When the switch-off button 21 is pressed downward, 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 to swing counterclockwise via the transmission connecting rod 32. When the engagement with the locking element 51 is released, the rotating plate 52 drives the movable contact 60 to swing counterclockwise and separates it from the stationary contact 61, and the circuit breaker enters the switch-off state.

[0058] Preferably, the on button operating end and the off button operating end are provided with a first mark and a second mark for identifying the on / off state, respectively, and both the first mark and the second mark have a color mark / symbol mark. The first mark is used to identify the on state and the corresponding second mark is used to identify the off state, or the first mark is used to identify the off state and the second mark is used to identify the on state. Furthermore, the color mark / symbol mark of the on button operating end and the off button operating end are different, for example, the color mark / symbol mark of the on button operating end can be red / off (O) respectively, and the color mark / symbol mark of the off button operating end can be green / on (I) respectively. When the circuit breaker is switched on, the on button operating end enters the on button hole 110, and the off button operating end is highlighted on the off button hole 111, and it can be determined that the circuit breaker is in the on state by the green and / or on (I) mark. Conversely, when the circuit breaker is switched off, the switch-off button operating end enters the switch-off button hole 111, the switch-on button operating end is highlighted on the switch-on button hole 110, and it can be determined that the circuit breaker is in a switched-off state by the red and / or switch-off (O) mark. The first and second marks located on the switch-on button operating end and the switch-off button operating end help users to more intuitively observe and judge the state of the circuit breaker and improve the electrical safety of users.

[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 generally rectangular in shape, the switch-on button 20 and the switch-off button 21 are arranged in parallel and linearly slidably mounted inside the circuit breaker housing 1, and further comprise first and second track mechanisms for defining the movement paths of the switch-on button 20 and the switch-off button 21, respectively.

[0060] Shown in Figures 3-5 is a first embodiment of the first track mechanism and the second track mechanism.

[0061] As shown in FIG. 3-5, the first track mechanism includes 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 includes a switch-off button track groove provided on the circuit breaker housing 1. , switch off button 21 is slidably provided inside the switch off button track groove. As shown in Fig. 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 a side wall of the circuit breaker housing 1 facing the first groove 105. The circuit breaker housing 1 further has a second groove 102 facing the first groove 105, and the switch off button track groove is formed by being surrounded by the first groove 105 and the second groove 102.

[0062] Preferably, as shown in Fig. 4, the on button 20 includes a on button operating part 202 and a on button transmission part 203. One end of the on button operating part 202 is a on button operating end, and the other end is overlappingly connected to the on button transmission part 203. The other end of the on button transmission part 203 is provided with a on button connecting hole 204 and a on button track protrusion 201, the on button connecting hole 204 is connected to one end of the on connecting rod 30 of the operating mechanism, and the on button track protrusion 201 and the on button operating part 202 are located on the same side of the on button transmission part 203. Specifically, as shown in Fig. 4, the left end of the on button operating part 202 is a on button operating end, and its right end is overlappingly connected to the left end of the on button transmission part 203. The right end of the on button transmission part 203 is provided with a on button connection hole 204 and a on button track protrusion 201, and the on button track protrusion 201 and the on button operation part 202 are located under the on button transmission part 203. Of course, the other end of the on button operation part 202 may also be horizontally connected to the on button transmission part 203 and located on the same plane instead of a lapped connection structure.

[0063] 5, the off button 21 preferably includes a off button operating part 212 and a off button transmission part 213. One end of the off button operating part 212 is an off button operating end, the other end is connected to one end of the off button transmission part 213, the other end of the off button transmission part 213 is provided with an off button connecting hole 214, which is connected to one end of the off connecting rod 31 of the operating mechanism. Specifically, as shown in FIG. 5, the off button 21 as a whole is in the shape of a strip, the left end of the off button operating part 212 is an off button operating end, the right end of which is connected to the off button transmission part 213, the right end of the off button transmission part 213 is provided with the off button connecting hole 214, which is located under the off button transmission part 213.

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

[0065] 7-9 shows a second embodiment of the first track mechanism and the second track mechanism. As shown in FIG. 7-9, the first track mechanism includes 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 includes 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 cooperates with the switch-off button track protrusion 205.

[0066] 8, the on button 20 preferably includes an on button operating part 202, an on button transmission part 203, and an on button track protrusion 205. One end of the on button operating part 202 is the on button operating part, and the other end is overlapped and connected to one end of the on button transmission part 203. The other end of the on button transmission part 203 is provided with an on button connecting hole 204 and an on button track protrusion 201, the on button track protrusion 205 is provided on one side of the on button transmission part 203, the on button track protrusion 205 and the on button operating part 202 are located on the same side of the on button transmission part 203, and the on button connecting hole is connected to one end of the on button connecting rod 30 of the operating mechanism. Specifically, as shown in Fig. 8, the upper end of the on button operation part 202 is the on button operation part, and its lower end is overlapped and connected to the upper end of the on button transmission part 203. The lower end of the on button transmission part 203 is provided with the on button connection hole 204 and the on button track protrusion 201, and the off button track protrusion 205 is provided between the on button operation part 202 and the on button connection hole 204, and is located on the right side of the on button transmission part 203, connecting the on button operation part 202 and the on button connection hole 204. The off button track protrusion 201 is provided on the left side of the off button transmission part 203. Furthermore, as shown in Fig. 8, the on button bottom foot 206 is provided on the left side of the upper end of the on button transmission part 203.

[0067] 9, the switch off button 21 preferably includes a switch off button operating part 212, a switch off button transmission part 213, a switch off button track part 215, and a switch off button connecting hole 214. One end of the switch off button operating part 212 is a switch off button operating end, and the other end is connected to one end of the switch off button transmission part 213. The other end of the switch off button transmission part 213 is provided with a switch off button connecting hole 214, the switch off button track part 215 is provided on one side of the switch off button transmission part 213, and a switch off button track groove 2150 is provided on one side of the switch off button track part 215 facing the switch off button transmission part 203. Specifically, as shown in FIG. 9, the left end of the switch off button operating part 212 is a switch off button operating end, and the right end thereof is connected to the left end of the switch off button transmission part 213. A switch off button connection hole 214 is provided at the right end of the switch off button transmission part 213, a switch off button track part 215 is provided at the right rear of the switch off button transmission part 213, and a switch off button track groove 2150 is provided below the switch off button track part 215.

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

[0069] Preferably, as shown in Fig. 10-24, the circuit breaker of the present invention further comprises 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, one end of which protrudes outside the circuit breaker housing 1. The circuit breaker housing 1 has a locking member opening 17 which mates with the first locking member 1a. One end of the first locking member 1a protrudes outside the circuit breaker housing 1 through the locking member opening 17. When the circuit breaker is in a switched-off state, the first locking member 1a can be retracted inside the circuit breaker housing 1 under the action of a retracting external force. For example, when the circuit breaker is mounted in the circuit breaker assembly position, during the assembly process, the assembly position housing of the circuit breaker pushes the first locking piece 1a to move it inside the circuit breaker housing 1 (the assembly position housing applies a retracting external force to the first locking member 1a), thereby causing the first locking member 1a to come into limited engagement with the switch-on button 20 and / or the switch-off button 21, and locks the switch-on button 20 and / or the switch-off button 21 to prevent the circuit breaker from being switched on. After the circuit breaker is assembled in a predetermined position, the locking member opening 17 corresponds to the assembly limit hole of the assembly position housing, and the first locking member 1a protrudes again to the outside of the circuit breaker housing 1 from the locking member opening 17, and releases the limited engagement with the switch-on button 20 and / or the switch-off button 21. By releasing the button mechanism and restricting the first locking member 1a to engage with the assembly restricting hole of the assembly position housing, the circuit breaker can be normally switched on and off via the switch-on button 20 and / or switch-off button 21, and cannot be pulled out of the assembly position at will.

[0071] Further, as shown in Fig. 14-17, the switch-on button 20 and / or the switch-off button 21 have a button limiting groove 216 that is in a limiting engagement with the first locking member 1a. The first locking member 1a has a first locking member limiting protrusion 14a that is in a limiting engagement with the button limiting groove 216. 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 prevents the first locking member 1a from moving inwardly of the circuit breaker housing 1. When the circuit breaker is in a switched-off state, the button limiting groove 216 is disposed opposite the first locking member limiting protrusion 14a, and the first locking member 1a can move inwardly of the circuit breaker housing, so that the first locking member limiting protrusion 14a slides into the button limiting groove 216.

[0072] Preferably, as shown in Fig. 10-15, the switch-on button 20 is arranged parallel to the switch-off button 21 and is linearly slidably provided inside the circuit breaker housing 1, and the first locking member 1a is linearly movably provided inside the housing 6. The moving direction of the switch-on button 20 and the switch-off button 21 is perpendicular to the moving direction of the first locking member 1a. Furthermore, as shown in Fig. 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 exerts an action force on the first locking member 1a, and keeps one end of the first locking member 1a protruding outside the circuit breaker housing 1 without the interference of other external forces. When the circuit breaker is in a switched-off state, the first locking member 1a can be retracted inside the circuit breaker housing 1 under the action of a retracting external 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, and both move 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 disposed opposite the first locking member limiting protrusion 14a of the first locking member 1a, and the first locking member 1a can move downward, so that the first locking member limiting protrusion 14a can slide into the button limiting groove to limit the left and right movements 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 or opposite the first locking member limiting protrusion 14a in the switched off state of the circuit breaker, so long as the button limiting groove 216 is misaligned with the first locking member limiting protrusion 14a in the switched on state of the circuit breaker.

[0074] 14 and 15, the switch-on button 20 is disposed parallel to the switch-off button 21, and the switch-on button 20 and the first locking member 1a are located above the switch-off button 21, i.e., 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, and the switch-off button 21 has a button limiting groove 216 that cooperates with the first locking member 1a to limit its position, 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 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 is sufficiently larger than the width of the first locking member limiting protrusion 14a in the moving direction of the switch-on button 20. The switch-on button 20 does not come into contact with the first locking member limiting protrusion 14a during the switch-on / switch-off operation, thereby moving the switch-on button 20 and the switch-off button 21 to switch on / off the circuit breaker. When the circuit breaker is in the switched-on state, the button limiting groove 216 is positioned out of alignment with 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. Switch off button 21 prevents the first locking member 1a from moving inwardly into the circuit breaker housing 1. When the circuit breaker is in a switched-off state, the button limiting groove 216 is disposed opposite 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, 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 avoiding groove 206, which avoids the first locking member limiting protrusion 14a of the first locking member 1a, so that the movement of the switch-on button 20 is not affected by the switch-on or switch-off operation. The first locking member 1a also closely approaches the switch-off button 21 to perform the release and locking, thereby shortening the movement 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 during the switch-off operation, and the first locking member 1a is pressed into the inside of 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 during switch-on operation, and as the first locking member limiting protrusion 14a is restricted by the switch-off button 21, the first locking member 1a is not pushed into the inside of the circuit breaker housing 1 and is not pulled out from the assembly position of the circuit breaker in the switch-on state.

[0076] Preferably, as shown in Figures 10-13 and 18, the circuit breaker of the present invention further comprises an unlocking mechanism drivably connected to the first locking member 1a. When the circuit breaker is in a switched-off state, the unlocking mechanism is operated to move the first locking member 1a towards the inside of the circuit breaker housing 1 and retract it into the inside of the circuit breaker housing 1, releasing the limited engagement with the assembly position housing and engaging the limited engagement with the button mechanism 2. When the circuit breaker is in a switched-on state, the switch-on button 20 and / or the switch-off button 21 prevent the first locking member 1a from moving towards the inside of the circuit breaker housing 1, ensuring that the locking cannot be released in the switched-on state and protecting electrical safety.

[0077] Further, as shown in Fig. 10-13, the release mechanism comprises an independent pulling member 2a drivably mated with the first locking member 1a. When the circuit breaker is in the switched-off state, pulling the pulling member 2a moves the first locking member 1a toward the inside of the circuit breaker housing 1, releasing the limited mating between the first locking member 1a and the assembly position housing. Further, as shown in Fig. 10-13, the release mechanism comprises an interlocking member 3a and a lever support 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 the middle part of the interlocking member 3a contacts the lever support 4a. When the pulling member 2a is pulled, the interlocking member 3a rotates around the lever support 4a as a fulcrum, so that the interlocking member 3a drives the first locking member 1a to move inside the circuit breaker housing 1 and releases the restricted engagement with the assembly position housing. In another embodiment, the release mechanism does not have the lever support 4a, and the interlocking member 3a is rotatably attached inside the circuit breaker housing 1 by engaging a waist-shaped hole provided in the interlocking member 3a with an interlocking member rotating shaft fixed to the circuit breaker housing 1, with one end of the interlocking member 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 rotates, so that the other end of the interlocking member 3a acts on the first locking member 1a and causes the first locking member 1a to retract inside the circuit breaker housing 1.

[0078] Compared with the existing circuit breaker that releases the limited engagement with the assembly position housing by a pull button, another improvement of the present invention is that the circuit breaker is provided with an independent pull member 2a of the release mechanism. Since no button mechanism is used to release the first locking member, the situation of pulling the button to pull the circuit breaker by mistake is avoided. It should be pointed out that the independent pull member 2a of the present invention is not only applicable to the solution of the switch on button 20 and the switch off button 21 of the present invention, but also to the situation where one button accomplishes the switch on / off operation.

[0079] It should be noted that in a modified embodiment, the first locking member 1a does not have the first locking member limiting protrusion 14a, and the first locking member 1a can be driven to move toward the inside of the circuit breaker housing 1 by pulling the pulling member 2a, regardless of the switching on / off operation of the circuit breaker.

[0080] A first embodiment of the first fastening member 1a is preferred, as shown in FIG.

[0081] As shown in Fig. 17, the first locking member 1a includes 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 disposed 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 in limited engagement with the locking member spring limiting structure 15a, the other end is in limited engagement with the circuit breaker housing 1, and the first locking member blocking protrusion 11a is in limited engagement with the circuit breaker housing 1 to prevent the first locking member 1a from slipping out of the locking member opening 17. As shown in FIG. 17, the first locking member 1a further includes a first locking member passive part 130a that connects with the interlocking member 3a of the release mechanism, and a first locking member connecting 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 into the first locking member connecting hole 13a. The first locking member passive part 130a is disposed on one side of the first locking member main body 10a, and is provided between the first locking member main body 10a and the lever support 4a. Also, as shown, the locking member spring limiting structure 15a is a spring limiting groove.

[0082] Preferably, the one shown in FIG. 16 is a second embodiment of the first fastening member 1a.

[0083] As shown in Fig. 16, the first locking member 1a of this embodiment is different from the first embodiment in that it is not provided with a protruding first locking member passive portion 130a, but instead one end of the first locking member body 10a protrudes outward from the circuit breaker housing 1, and the other end is provided with a first locking member connection hole 13a as the first locking member passive portion 130a. Also, as shown in Fig. 17, the locking member spring limiting structure 15 is a spring limiting structure protruding portion. Obviously, the first locking member 1a may have other similar structures as required.

[0084] Preferably, shown in Figures 10, 11A, 11B and 18 are several embodiments of tension member 2a.

[0085] The pulling member 2a includes a pulling member operating part 20a, a first transition part 21a of the pulling member, and a pulling member driving part 24a, the pulling member operating part 20a is vertically connected to the first transition part 21a of the pulling member, and the pulling member driving part 24a is diagonally connected to the first transition part 21a of the pulling member. The pulling member operating part 20a constitutes an operating part that is convenient for pulling by hand or tool, the first transition part 21a of the pulling member is parallel to the moving direction of the pulling member 2a to constitute a sliding support, and the pulling member driving part 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 only includes the pulling member operating part 20a, the first transition part 21a of the pulling member, and the pulling member driving part 24a. In this case, the tension member 2a forms a substantially Z-shaped or U-shaped structure, but the Z-shaped structure occupies a relatively large space, and the sliding compatibility between the U-shaped structure and the locking mechanism is unstable.

[0086] Further, in a preferred embodiment, as shown in FIG. 11A, the pulling member 2a includes a pulling member second transition portion 22a connected between the pulling member first transition portion 21a and the pulling member drive portion 24a. The pulling member second transition portion 22a is parallel to the pulling member operating portion 20a and perpendicular to the pulling member first transition portion 21a, and both the pulling member second transition portion 22a and the pulling member operating portion 20a are located on one side of the pulling member first transition portion 21a to form a U-shaped structure. The pulling member 2a can be bent to reduce the space occupied by it and pull the pulling member second transition portion 22a, thereby pulling out the circuit breaker and restricting the position of the pulling member 2a. The pulling member drive portion 24a bends away from the pulling member operating portion 20a and tilts to one side of the pulling member first transition portion 21a.

[0087] Further, in a preferred embodiment, as shown in FIG. 11B, the pulling member 2a includes a third transition portion 23a of the pulling member connected between the first transition portion 21a of the pulling member and the pulling member drive portion 24a. The third transition portion 23a of the pulling member is arranged parallel to the first transition portion 21a of the pulling member, and is used to balance the sliding of the pulling member 2a and adjust the position of the pulling member drive portion 24a. And / or, the pulling member 2a includes a pulling member holding portion 25a connected to the pulling member drive portion 24a. The pulling member holding portion 25a is arranged parallel to the first transition portion 21a of the pulling member. The pulling member drive portion 24a is tilted to gradually drive the interlocking member 3a to retract the first locking member 1a into the inside of the circuit breaker housing 1, and then the pulling 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 Fig. 18, the tension member 2a comprises a tension member operating part 20a, a first transition part 21a of the tension member, a second transition part 22a of the tension member, a third transition part 23a of the tension member, a tension member driving part 24a and a tension member holding part 25a, which are connected in sequence. The tension member operating part 20a is arranged parallel to the second transition part 22a of the tension member, and the first transition part 21a of the tension member and the third transition part 23a of the tension member are arranged parallel to the tension member holding part 25a and perpendicular to the tension member operating part 20a. The tension member driving part 24a is provided obliquely. One end that is bent and connected to the third transition part 23a of the tension member is the first end of the driving part, and the other end that is bent and connected to the tension member holding part 25a is the second end of the driving part. The first end of the drive portion is farther away from the first locking member 1a than the second end of the drive portion. 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 pulling member limiting bar 6a provided between the pulling member operating part 20a and the second transition part 22a of the pulling member. After pulling the pulling member 2a to return the first locking member 1a to the inside of the circuit breaker housing 1 and releasing the limiting fit with the assembly position housing, the pulling member 2a is continued to be pulled to bring it into limiting fit with the pulling member limiting bar 6a, and the circuit breaker is pulled out of 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 part of the interlocking member 3a contacts and engages with the lever support 4a provided above the first locking member 1a, and its left end is drivably engaged with the pulling member drive part 24a. The upper and lower ends of the pulling member drive part 24a are the first end of the drive part and the second end of the drive part, respectively. When the circuit breaker is in the switched-off state, the pulling member 2a is pulled upwards until the pulling member drive part 24a contacts the left end of the interlocking member 3a (as shown in Figure 12). 13, when the pulling member 2a is continued to be pulled and the interlocking member 3a is rotated clockwise around the lever support portion 4a as a fulcrum, the right end of the interlocking member 3a moves the first locking member 1a to the left, and the right end of the first locking member 1a is returned completely inside the circuit breaker housing 1 to be in limited engagement with the button mechanism 2. Thus, the limited engagement between the first locking member 1a and the assembly position housing is released, and the limited engagement between the pulling member holding portion 25a and the interlocking member 3a is formed, so that the first locking member 1a is held inside the circuit breaker housing 1.

[0091] Preferably, as shown in FIG. 11A, the pulling member 2a is made of a metal magnetic material, and the release mechanism further includes a pulling member holding magnet provided inside the circuit breaker housing 1 and cooperating with the pulling member operating part 20a. The holding 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 holding magnet can hold the pulling member operating part 20 securely inside the circuit breaker housing, and when there is no need to operate the pulling member 2a, it can protect the beautiful and beautiful appearance of the circuit breaker and prevent the pulling member 2a from unexpectedly protruding from the circuit breaker housing 1, causing 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 holding magnet in a magnetically absorbable manner, thereby holding the pulling member in the pulled out position outside the circuit breaker housing 1.

[0092] Furthermore, as should be pointed out, "magnetically cooperating" means that the pulling member operating part 20a is attracted under the action of the pulling member holding magnet. The pulling member 2a is made of a metallic magnetic material, which is magnetically attracted by the pulling member holding magnet, and is not necessarily a magnet.

[0093] 1, 19, 20 and 25, the circuit breaker housing 1 preferably includes an output line hole 112 and a pulling member operation hole 113. The output line hole 112, the pulling 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 pulling member removal groove 16, and the pulling member operation part 20a of the pulling member 2a is provided inside the pulling member operation hole 113, so that the pulling member 2a does not protrude from the circuit breaker housing 1 when not pulled out. The pulling member removal groove 16 is connected to the pulling member operation hole 113, and the pulling operation is performed via the pulling member removal groove 16.

[0094] Furthermore, as a preferred solution, the pulling member take-out groove 16 is provided between the output line hole 112 and the pulling member operation hole 113, and is blocked by the output line. Both ends of the pulling member take-out groove 16 communicate with the output line hole 112 and the pulling member operation hole 113, respectively. Just after disconnecting the output line, the pulling member operation part 20a is drilled from the pulling member operation hole 113 in the pulling member take-out groove 16. Or, as another preferred solution, the pulling member take-out groove 16 is provided between the switch-off button hole 111 and the pulling member operation hole 113. When the circuit breaker is in a switched-on state, the switch-off button 21 blocks the pulling member take-out groove 16. When the circuit breaker is switched off, the switch-off button 21 moves inwardly into the circuit breaker housing 1 to avoid the pulling member removal groove 16, and the pulling member operating part 20a is drilled through the pulling member operation hole 113 in the pulling member removal groove 16. When the output line is disconnected, the pulling member can be pulled out only when the circuit breaker is switched off. The above structure ensures that the release mechanism can release the restrictive fit between the first locking member 1a and the assembly position housing only when the circuit breaker is switched off. Pulling the pulling member 2a when the circuit breaker is switched on avoids breaking the pulling member 2a or pulling out the circuit breaker due to charging, and ensures the electrical safety of the user.

[0095] Preferably, in another embodiment of the pulling member, as shown in FIG. 11B, the pulling member 2a includes a pulling member spring limiting portion 26a. The pulling member spring limiting portion 26a is arranged parallel to the pulling member operating portion 20a, and is located at both ends of the pulling member 2a, respectively. The release mechanism further includes a pulling member return spring 7a provided between the pulling member spring limiting portion 26a and the pulling member limiting bar 6a. The pulling member return spring 7a makes the pulling member operating portion 20a of the pulling member 2a firmly held inside the circuit breaker housing. The pulling member spring limiting portion 26a is bent and connected to the pulling member operating portion 20a.

[0096] Also, as shown in Fig. 10-13, the pulling member 2a is arranged overlapping the switch-on button 20 and the switch-off button 21 along the thickness direction of the circuit breaker to save space. The moving direction of the pulling member 2a is parallel to the moving direction of the switch-on button 20 and the switch-off button 21 and perpendicular to the moving direction of the first locking member 1a, and the first locking member 1a moves along the width direction of the circuit breaker. The first transition part 21a of the pulling member 2a moves close to the side wall of the locking member opening 17 provided in the circuit breaker housing 1. The first transition part 21a slides while being restricted between the pulling member limiting muscle 6a and the lever support 4a along the moving direction, and is restricted by one end of the pulling member limiting muscle 6a and the circuit breaker housing 1 along the vertical moving direction. The first transition part 21a and the first locking member 1a are respectively arranged on both sides of the lever support 4a, and the interlocking member 3a is located between the first locking member 1a and the lever support 4a. The pulling member 2a, the interlocking member 3a and the first locking member 1a are all arranged 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 protrudes and extends into the switch-on button avoiding groove 206 of the switch-on button 20.

[0097] Preferably, the interlocking member 3a is a Z-shaped or U-shaped pulling rod, one end of which is inserted into the first locking member 1a and the other end of which extends to the sliding position of the pulling member drive part 24a of the pulling member 2a. The interlocking member 3a returns the first locking member 1a to the inside of the blocking housing 1 with the lever support 4a as a rotation fulcrum, and has a relatively simple mounting structure, and the lever support 4a also has the function of restricting the first locking member and supporting the interlocking member 3a.

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

[0099] As shown in Figures 21-24, the second locking member 1b is pivotally mounted on the circuit breaker housing 1, and the second locking member 1b 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 a second direction) to cause the second locking end 13b to protrude outside 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 a first direction) to cause the second locking end 13b to retract inside the circuit breaker housing 1.

[0100] 22-24, the switch-on button 20 has a switch-on button actuator 207 which drives and engages with the second locking member 1b, and the switch-off button 21 has a switch-off button actuator 217 which drives and engages with the second locking member 1b. As shown in FIG. 24, when the circuit breaker is turned on, the switch-off button 21 rotates the second locking member 1b via the switch-off button actuator 217 to make the second locking end 13b protrude outside the circuit breaker housing 1, and the release button actuator 217 supports the second locking end 13b to prevent the second locking end 13b from returning inside the circuit breaker housing 1. As shown in Fig. 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 to retract the second locking end 13b into the inside of the circuit breaker housing 1, and the switch-on button drive unit 207 restricts the second locking end 13b to hold the second locking end 13b inside the circuit breaker housing 1. As shown in Fig. 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) to cause the second locking end 13b to protrude outside the circuit breaker housing 1. As shown in Fig. 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) to retract the second locking end 13b into the inside of the circuit breaker housing 1.

[0101] Preferably, as shown in Fig. 22-24, 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 with the switch-off button 21, a second passive portion 12b of the locking member that drives 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, thereby causing the second locking end 13b to protrude outside 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, thereby causing the second locking end 13b to retract outside the circuit breaker housing 1. In this embodiment, the first passive part 11b and the second locking end 13b are two blending ends, but in another embodiment, the first passive part 11b and the second locking end 13b may be the same blending end. Also, as shown in Figures 22 and 24, the first passive part 11b of the locking member has a first passive protrusion 110b of the locking member protruding from one side of the switch-off button 21, and the second passive part 12b of the locking member has a second passive actuation protrusion 120b of the locking member protruding from one side of the switch-on button 20. The first passive protrusion 110b of the locking member and the second passive actuation protrusion 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, thereby causing the second locking end 13b to protrude outside 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, thereby causing the second locking end 13b to retract outside the circuit breaker housing 1.

[0102] 22-24, the switch-on button actuator 207 has a switch-on button actuator slope 2070 which is driven and mated with the second passive protrusion 120b of the locking member, and the switch-off button actuator 217 has a switch-off button actuator slope 21700 which is driven and mated with the first passive protrusion 110b of the locking member. The inclination direction of the switch-on button actuator slope 2070 is opposite to the inclination direction of the switch-off button actuator slope 21700, and the first passive protrusion 110b of the locking member and the second passive protrusion 120b of the locking member are inclined relative to the switch-off button actuator slope 21700. With the switch on button drive slope 2070 Located between.

[0103] When the switch-on button 20 is pressed to switch on the circuit breaker, the switch-on button driving slope 2070 moves inwardly of the circuit breaker housing 1 along with the switch-on button 20 to avoid the second locking member 1b, while the switch-off button driving slope 21700 moves outwardly of the circuit breaker housing 1 along with the switch-off button 21 to rotate the second locking member 1b via the first passive protrusion 110b of the locking member. The second locking end 13b protrudes outwardly of the circuit breaker housing 1, and the driving 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.

[0104] When the switch-off button 21 is pressed to switch off the circuit breaker, the switch-off button driving slope 21700 moves toward the inside of the circuit breaker housing 1 along with the switch-off button 21 to avoid the second locking member 1b, and at the same time, the switch-on button driving slope 2070 moves toward the outside of the circuit breaker housing 1 along with the switch-on button 20 to press the second passive protrusion 120b of the locking member to retract the second locking end 13b toward the inside of the circuit breaker housing 1 and restrict 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 driving slope 2070 is formed by the switch-on button driving protrusion provided on the switch-off button 20, and the switch-off button driving slope 21700 is formed by the switch-off button driving groove provided on the switch-off button 21. When the circuit breaker is in the switched off state, the switch on button actuation ramp 2070 and the switch off button actuation ramp 21700 form a funnel-shaped structure.

[0105] 22-24, the switch off button actuator 217 preferably includes a first protruding step 2170 of the switch off button actuator provided on one side of the switch off button 21, and a second protruding step 2171 of the switch off button actuator provided on one side of the first protruding step 2170 of the switch off button actuator away from the switch off button 21. The first protruding step 2170 of the switch off button actuator has a triangular structure as a whole, and the second protruding step 2171 of the switch off button actuator is disposed at one corner of the triangular structure closer to the switch on button 20.

[0106] 22 and 24, the second locking member 1b has a substantially H-shaped structure. The second locking member attachment portion 10b and the locking member first passive portion 11b are located at one end of the second locking member 1b and form one side of the H-shaped structure. The locking member second passive portion 12b and the second locking end 13b are located at the other end of the second locking member 1b and form the other side of the H-shaped structure.

[0107] 3, 21-24, 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 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 pulling 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, and of course, two independent locking member openings may be shared. In the moving direction 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] Shown in FIG. 25 is one embodiment of a circuit breaker housing 1.

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

[0110] 25, the button holes 110-111 preferably include an on button hole 110 and a off button hole 111 arranged side by side. Furthermore, the on button operation end of the on button 20 and the off button operation end of the off button 21 are slidably arranged inside the on button hole 110 and the off button hole 111, respectively, and do not always protrude from the front wall 1001 of the circuit breaker housing 1, thereby preventing the user from accidentally touching the on button operation end / off button operation end to turn the circuit breaker on / off, and ensuring the stability and safety of the user's power consumption.

[0111] Preferably, as shown in FIG. 25, the button hole 110-111 and the pulling member operation hole 113 are provided at one end of the front wall 1001, one output line hole 112 is provided at the other end of the front wall and serves as the first output line hole, and another output line hole 112 is provided between the first output line hole and the button hole 110-111 and serves as the second output line hole. The button hole 110-111 and the second output line hole are located on the same side of the pulling member operation hole 113. Furthermore, as shown in FIG. 19, the circuit breaker housing 1 has a pulling member take-out groove 16 provided in the front wall 1001. The pulling member take-out groove 16 is provided between the second output line hole and the pulling member operation hole 113, and both ends of the groove are respectively connected to the second output line hole and the pulling member operation hole 113. The output line inserted into the second output line hole blocks the pulling member take-out groove 16. 20, the pulling member outlet groove 16 is provided between the switch-off button hole 111 and the pulling member operating hole 113. When the circuit breaker is in the switched-on state, the switch-off button 21 of the circuit breaker blocks the pulling member outlet 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 Fig. 25. The wire removal hole 1120 corresponds one-to-one to the output wire hole 112, and the communication hole 15 is located between the two input wire holes 14.

[0113] Preferably, as shown in Fig. 25, the circuit breaker housing 1 further includes a third side wall 1003 and a fourth side wall 1004 provided opposite to each other, and a fifth side wall 1005 and a sixth side wall 1006 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. In addition, as shown in Fig. 25, a locking member opening 17 is provided at one end of the third side wall 1003 approaching the front side wall 1001.

[0114] As mentioned above, the present invention is further described in detail in combination with certain preferred embodiments, but the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, some simple inferences or substitutions can be made without departing from the concept of the present invention, which should be considered as belonging to the protection scope 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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