Plug-in type circuit breaker

Abstract

The plug-in circuit breaker comprises a housing, a button mechanism, and an operating mechanism, and the button mechanism has an ON position / OFF position corresponding to the ON / OFF state of the circuit breaker. The circuit breaker also comprises an interlocking member and a locking member mounted on the housing, the interlocking member having a contact boss and the locking member having a locking boss. When the button mechanism is in the ON position, the contact boss of the interlocking member protrudes from the housing and is restricted to its extended position by the button mechanism and cannot return to the housing; when the button mechanism is in the OFF position, the interlocking member retracts into the housing, and the locking boss of the locking member protrudes from the housing and is pushed back into the housing by an external force. The circuit breaker of the present invention reliably prevents insertion and removal of the switch, avoids the risk of electrostatic charging, and also prevents the circuit breaker from falling out of the cabinet due to vibration during transportation.

Description

[Technical Field]

[0001] The present invention relates to the technical field of low voltage terminal side electrical appliances, in particular to plug-in type circuit breakers. [Background technology]

[0002] With the rapid development of network communication technology, especially the widespread application of 5G networks, there is an ever-increasing demand for circuit breakers to effectively improve the safety of electrical equipment. However, the traditional power supply method of connecting multiple attachment plugs and plug plates to a single terminal circuit breaker is less likely than usual to meet the requirements for safe power consumption and equipment protection. For example, terminal circuit breakers for 5G communication equipment need to be upgraded and improved in terms of performance, such as miniaturization, intelligence, reliability, and stability. Furthermore, many new, integrated structures have also been developed to meet usage requirements, such as circuit breakers that are easy to insert and remove like an attachment plug and that need to be locked in place. These new circuit breakers are called plug-in circuit breakers, but they do not belong to the traditional insertable, removable, pull-out, or general-purpose circuit breakers. These new plug-in circuit breakers not only provide various safety protection functions that circuit breakers have to power distribution lines and electrical equipment, but also meet various electrical equipment requirements for power quality, and allow the circuit breaker itself to be easily inserted and removed from the circuit using an insert / removal mechanism. For this reason, the structure of plug-in type circuit breakers has already been diversified, but as electrical equipment tends to become smaller, it is urgent to further improve, optimize and upgrade the overall structure and operation method of circuit breakers to suit this trend.

[0003] Existing plug-in type circuit breakers are usually provided with a locking device to prevent the circuit breaker from being pulled out in the switched-on state and / or to prevent the circuit breaker from switching on while being inserted, but in the switched-off state, no locking mechanism is usually provided as the circuit breaker can be inserted into the cabinet, but vibrations due to transportation or other similar causes may cause the circuit breaker to fall out of the cabinet.

[0004] In addition, existing locking devices often do not prevent erroneous rough insertion or rough extraction when the circuit is switched on. Furthermore, mechanisms such as locking devices and unlocking devices of existing plug-in circuit breakers generally lack a design that avoids the easy loss of insertion / extraction protection function and low reliability and stability caused by structural factors of the insertion receiver. In addition, mechanisms such as locking devices and unlocking devices of existing plug-in circuit breakers cause problems such as poor interchangeability, versatility, and tolerance as mentioned above, because people are unaware of the impact that the adopted device structure has on the selection of the insertion receiver.

[0005] Furthermore, the locking device of existing plug-in circuit breakers has many components, a complex structure, and complicated functionality. Furthermore, because the sheet metal structure of the mounting cabinet has a certain degree of flexibility, the circuit breaker may be roughly attached to the mounting cabinet even when switched on, posing a risk of electrostatic discharge. This is mainly caused by the lateral force (component force) of the insertion / extraction force on the circuit breaker. For example, based on mechanical analysis, it is not difficult to conclude that the artificially applied insertion / extraction force is the main force and can be decomposed into a vertical force parallel to the insertion / extraction direction and a lateral force perpendicular to the insertion / extraction direction. The greater the internal force of the mechanism resisting insertion / extraction (frictional force, elastic force, etc., which resists the longitudinal force of insertion / extraction), the greater the required insertion / extraction force, i.e., the more force is applied. Conversely, the smaller the required insertion / extraction force, i.e., the less force is required, the easier the insertion / extraction operation. Furthermore, if the lateral force (component force) of the insertion / extraction force applied to the circuit breaker is large and the force acts on a part (or point) of the circuit breaker, the insertion receptacle is likely to deform due to stress concentration, and this deformation is directly related to the adaptability of the circuit breaker. Therefore, in terms of mechanism design, it is necessary to use as few structures as possible that are subject to lateral forces (component forces), especially structures that can amplify lateral forces (awls, wedges, inclined surfaces, levers, etc.), (avoiding them if possible), but those skilled in the art are often unaware of this with existing technology. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a plug-in type circuit breaker with a simple structure and high safety and reliability. [Means for solving the problem]

[0007] In order to achieve the above object, the solution of the present invention is as follows.

[0008] A plug-in type circuit breaker comprising a housing, a button mechanism and an operating mechanism, wherein the button mechanism moves the operating mechanism to perform a switch-on / switch-off operation, and the button mechanism has a switch-on position / switch-off position corresponding to the switch-on / switch-off state of the circuit breaker, the circuit breaker comprising an interlocking member and a locking member provided on the housing, wherein the interlocking member is provided with a contact boss and the locking member is provided with a locking boss, when the button mechanism is in the switch-on position, the contact boss of the interlocking member protrudes from the housing and is restricted to an extended position by the button mechanism and does not return to the housing; when the button mechanism is in the switch-off position, the interlocking member returns to the inside of the housing, and the locking boss of the locking member protrudes from the housing and is pushed back into the housing by a retracting external force.

[0009] Preferably, when the button mechanism is in the switch-off position, when the locking boss of the locking member returns to the inside of the housing under the action of a retracting external force, the locking member and the button mechanism come into contact with each other, thereby preventing the button mechanism from switching from the switch-off position to the switch-on position.

[0010] Preferably, when the button mechanism is in a switched-on position, the locking boss of the locking member protrudes from the housing and is restricted to an extended position by the button mechanism so as not to return to the inside of the housing.

[0011] Preferably, after the circuit breaker is switched off, the button mechanism is pulled and moves to the outside of the housing, and while the button mechanism is moving to the outside of the housing, the locking boss of the locking member is returned to the inside of the housing.

[0012] Preferably, while the button mechanism is moving to the outside of the housing, the button mechanism drives the interlocking member, which moves the locking member to release the lock, thereby causing the locking boss to return to the inside of the housing.

[0013] Preferably, the interlocking member is rotatably provided on the housing, and the interlocking member includes a release portion that cooperates with the locking member and a linking member drive portion that cooperates with the button mechanism, and when the button mechanism moves outside the housing, the interlocking member drive portion rotates the interlocking member, and the release portion applies force to the locking member to return the locking boss of the locking member to the inside of the housing.

[0014] Preferably, the button mechanism comprises a button, a connecting rod and a drive member, the button actuating the drive member via the connecting rod, the drive member being rotatably mounted within the housing and connected to the actuation mechanism.

[0015] Preferably, when the button mechanism is in a switched-on position, the locking boss of the locking member protrudes from the housing, and the outer surface of the drive member engages with the locking member to prevent the locking member from returning to the inside of the housing; when the button mechanism is in a switched-off position, the outer surface of the drive member displaces from the locking member to release the engagement.

[0016] Preferably, the locking member has an extending pillar, and the drive member has a drive stop portion that mates with the extending pillar, and when the button mechanism is in the switch-off position, the drive stop portion of the drive member faces the extending pillar of the locking member, and when the locking boss of the locking member returns to the inside of the housing, the extending pillar of the locking member mates with the drive stop portion to prevent the drive member from rotating in the switch-on direction and the button mechanism from switching from the switch-on position to the switch-off position.

[0017] Preferably, the locking member is attached to the inside of the housing via an elastic member, the elastic member being provided between the locking member and the housing, and the elastic member causing the locking boss of the locking member to protrude from the housing.

[0018] Preferably, the cross section of the locking boss of the locking member is a right-angled trapezoid or a right-angled triangle, and the locking boss has a vertical surface and an inclined surface, the vertical surface facing in the direction in which the circuit breaker is pulled out of the cabinet and perpendicular to the mounting and insertion direction of the circuit breaker, and the inclined surface facing in the direction in which the circuit breaker is inserted into the cabinet.

[0019] Preferably, the interlocking member comprises a contact boss and a passive boss, and when the switch is turned on, the button mechanism presses the passive boss so that the contact boss protrudes from the housing, and the button mechanism and the passive boss engage in a pressure relationship to prevent the contact boss from returning to the inside of the housing, and when the switch is turned off, the button mechanism releases the pressure relationship with the passive boss and displaces, so that the contact boss returns to the inside of the housing.

[0020] Preferably, the housing is provided with a fastening hole, and the contact boss of the interlocking member and the locking boss of the locking member are aligned with the same fastening hole.

[0021] Preferably, the button mechanism comprises a button, a connecting rod and a drive member, the button actuating the drive member via the connecting rod, the drive member being rotatably arranged within the housing and connected to the actuation mechanism, a first drive part cooperating with the passive boss being arranged on the button, the button and the passive boss abutting against the first drive part when the button mechanism is in a switched-on position, and the first drive part of the button being displaced and shifted from the passive boss when the button mechanism is in a switched-off position.

[0022] Preferably, the collision boss is cubic, has a left contour surface and a right contour surface, and when the collision boss is in an extended position, the left contour surface and the right contour surface are perpendicular to the mounting and inserting direction of the circuit breaker, respectively, and the left contour surface prevents the circuit breaker from being pulled out from the cabinet along the direction in which the circuit breaker is pulled out from the cabinet, and the right contour surface prevents the circuit breaker from being inserted into the cabinet along the direction in which the circuit breaker is inserted into the cabinet.

[0023] Preferably, the housing is provided with a locking hole arranged in the locking boss, the locking member is attached to the inside of the housing via a linear moving pair, the linear moving direction of which is perpendicular to the attachment and insertion direction of the circuit breaker, the locking member is provided between the button mechanism and the locking hole, the locking boss is provided at an upper part of the locking member close to the locking hole, an extending pillar is provided at a lower part of the locking member close to the button mechanism, and an interlocking step is provided on one side of the locking boss.

[0024] Preferably, the interlocking member has a rotation center in the middle, the collision boss on one side of one end, a release part cooperating with the locking member on the other side, and an interlocking member drive part on the other end, and the passive boss on the side closer to the button mechanism between the rotation center and the collision boss; the button mechanism has a drive part cooperating with the interlocking member drive part, and when the switch is turned off, the button mechanism releases the pressure engagement with the passive boss and displaces while moving outside the housing, and the drive part of the button mechanism pulls the interlocking member drive part to rotate the interlocking member and return the collision boss to the inside of the housing; when the button mechanism is in the switch-off position, the button mechanism is pulled and moves outside the housing, and while the button mechanism continues to move outside the housing, the drive part continues to move and rotate the interlocking member, causing the release part to apply a retracting external force to the locking member and return the locking member to the inside of the housing.

[0025] The plug-in circuit breaker of the present invention comprises a circuit breaker housing, a locking member mounted inside the circuit breaker housing, an interlocking member, and a button mechanism. When the button mechanism is in the on position, the contact boss of the interlocking member is held in the extended position by the button mechanism and does not return to the retracted position, thereby reliably preventing insertion and removal of the switch and avoiding the risk of electrostatic discharge. When the button mechanism is in the off position, the contact boss of the interlocking member returns to the inside of the housing, and the locking boss of the locking member protrudes from the housing but can be pushed back into the housing by the action of an external force. In other words, in addition to preventing the circuit breaker from being inserted into the cabinet in the off state, it also prevents the circuit breaker from falling out of the cabinet due to vibrations during transportation, etc.

[0026] Also, when the button mechanism is in the switch-off position, if the locking boss of the locking member returns to the inside of the cabinet, the locking member will resist the button mechanism and prevent the button mechanism from switching from the switch-off position to the switch-on position, and the circuit breaker will not be able to be switched on.If the circuit breaker is not installed in the correct working position on the cabinet, it will not be able to be switched on, but only when the circuit breaker is installed in the correct working position can the button mechanism be able to switch on / off normally.

[0027] Furthermore, when the button mechanism is in the on position, the locking member is stopped in the extended position by the driving member and does not return to the retracted position, and together with the interlocking mechanism as an auxiliary mechanism, it can reliably prevent the circuit breaker from being roughly withdrawn in the on state. Due to the feature provided in the structure that it does not return to the retracted position, the ability of the circuit breaker product to resist abnormal rough withdrawal is effectively strengthened.

[0028] Furthermore, when the button mechanism is in the switch-on position and it is necessary to remove the circuit breaker, the locking member is released via the interlocking member, causing the locking boss of the locking member to return to the inside of the housing, allowing the circuit breaker to be safely pulled out of the mounting cabinet. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a schematic structural diagram of the entire plug-in type circuit breaker of the present invention. [Figure 2] 2 is a schematic structural diagram of the button mechanism, interlocking member, and locking member in FIG. 1. FIG. [Figure 3] 3 is a partially enlarged schematic view of the interlocking member, grip, and locking member of the present invention. FIG. [Figure 4] FIG. 1 is a schematic diagram showing the structure of a plug-in circuit breaker in a state where live insertion is prevented during installation. [Figure 5] FIG. 2 is a schematic diagram showing the structural state of a plug-in type circuit breaker in a state in which withdrawal due to switching on is prevented. [Figure 6] 1 is a partially enlarged schematic view of the interlocking member, the locking member, and the grip when properly installed and in the switched-on state; [Figure 7] 10 is a partially enlarged schematic view of the switch on / off indicator and release mechanism of the button mechanism. FIG. [Figure 8] FIG. 10 is a partially enlarged schematic view of the switch on / off display and release mechanism in the switched off state. [Figure 9] FIG. 10 is a partially enlarged schematic view of the switch on / off display and release mechanism in the switched on state. [Figure 10] 10 is a partially enlarged schematic diagram of the switch on / off display and release mechanism in the switch off and switch off states. FIG. [Figure 11] 1 is a schematic structural diagram of a specific embodiment of an interlocking member and a housing of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0030] 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 to 11. The plug-in type circuit breaker of the present invention is not limited to the following description.

[0031] 1, the plug-in circuit breaker of the present invention comprises a housing 6, a button mechanism, an operating mechanism 9 drivingly connected to the button mechanism, a movable contact 9a connected to the operating mechanism 9, and a static contact 9b provided opposite the movable contact, and typically further comprises other circuit breaker components (not shown), such as (but not limited to) a short-circuit protection mechanism 11, an arc-extinguishing device 12, an overload protection mechanism 14, an output line connection device 13, and input line connection devices 1a and 1b. The button mechanism moves the operating mechanism 9 to bring the movable contact into contact with the static contacts to turn on the switch, or separate the movable contact from the static contacts to turn off the switch. The button mechanism has an on position and a off position corresponding to the on / off state of the circuit breaker.

[0032] As shown in Figure 1-2, a locking device is also provided in the plug-in type circuit breaker, a locking hole 61 arranged for the locking device is provided in the housing 6, and a cabinet locking hole B0 is provided in the sheet metal member B of the cabinet of the insertion receptacle of the plug-in type circuit breaker. When the plug-in type circuit breaker is installed in the working position, the locking hole 61 of the plug-in type circuit breaker corresponds to the cabinet locking hole B0, and when the plug-in type circuit breaker is not installed in the working position, the locking hole 61 of the plug-in type circuit breaker is offset from the cabinet locking hole B0, and the cabinet sheet metal member B blocks the cabinet locking hole B0. The above belongs to the prior art in this field, so it will not be repeated here.

[0033] As shown in Figures 1 and 4-5, the plug-in circuit breaker of the present invention includes a housing 6 with a locking hole 61, a button mechanism, and an operating mechanism 9. The button mechanism operates the operating mechanism 9 to turn the circuit breaker on and off, and has an on position and an off position corresponding to the on and off states of the circuit breaker. The button mechanism includes a button 2, a connecting rod 7, and a driving member 5. The button 2 operates the driving member 5 via the connecting rod 7, which is rotatably mounted within the housing 6 and connected to the operating mechanism 9. When the button 2 is pressed, the button 2 rotates the driving member 5 to one side via the connecting rod 7, and the driving member 5 moves the operating mechanism 9 via the U-shaped rod 8, bringing the movable contact 9a and the static contact 9b into contact with each other, thereby achieving an on-state switch. When the button 2 is pulled, the button 2 rotates the driving member 5 to the other side via the connecting rod 7, and the driving member 5 moves the operating mechanism 9 via the U-shaped rod 8, separating the movable contact 9a and the static contact 9b, thereby achieving an off-state switch. The function of the driving member 5 is similar to the grip of a conventional miniature circuit breaker. The operating mechanism usually comprises a contact support connected to the movable contact 9a, a locking element, and a pull-off element, and a short-circuit protection mechanism and an overload protection mechanism are provided corresponding to the locking element of the operating mechanism. When a short circuit or an overload occurs, the respective locking element is acted upon, causing the operating mechanism to come out and the circuit breaker to switch off, thereby realizing protection.

[0034] The improvement of the present invention is that the circuit breaker further comprises a locking device, which comprises an interlocking member 3 and a locking member 4 mounted on the housing 6, wherein the interlocking member 3 is provided with a contact boss 31, and the locking member 4 is provided with a locking boss 41 corresponding to the locking hole 61. When the button mechanism is in the on position, the contact boss 31 of the interlocking member 3 protrudes from the housing 6 and is restricted to an extended position by the button mechanism 2 and does not return to the housing. When the button mechanism is in the off position, the interlocking member 3 returns to the inside of the housing 6, and the locking boss 41 of the locking member 4 protrudes from the locking hole 61 of the housing 6. After a retracting external force is applied to the locking member 4, the locking member 4 can be pushed back into the housing 6 by the retracting external force. In one embodiment, the contact boss 31 of the interlocking member 3 is provided corresponding to the second locking hole of the housing 6, and the second locking hole and the locking hole 61 are arranged side by side. When the button mechanism is in the on position, the contact boss 31 protrudes from the second locking hole of the housing 6. In a preferred embodiment, the second fastening hole and the fastening hole 61 are the same fastening hole, and the collision boss 31 and the locking boss 41 share the same fastening hole 61. In this embodiment, the solution in which the collision boss 31 and the locking boss 41 share the same fastening hole 61 is adopted.

[0035] As shown in Figures 4 and 11, the circuit breaker is switched on before installation, and the interlocking member 3 is rotated counterclockwise by the first actuator 20 of the button 2. The contact boss 31 of the interlocking member 3 protrudes from the stop hole 61 of the housing 6 and is supported by the first actuator 20 of the button 2, restricting it to an extended position and preventing it from returning to the inside of the housing. At this time, when the circuit breaker is reinstalled in the cabinet, the right contour surface 31b of the contact boss 31 abuts against the side end surface B1 of the cabinet sheet metal member, preventing the circuit breaker from being installed in the working position. This prevents charging during the work and improves safety.

[0036] As shown in Figure 5, the circuit breaker is properly installed and switched on. The contact boss 31 of the interlocking member 3 protrudes from the locking hole 61 in the housing 6 and is supported by the first actuator 20 of the button 2, restricting it to the extended position and preventing it from returning to the inside of the housing. The left contour surface 31a of the contact boss 31 abuts against the hole wall surface B2 of the cabinet locking hole B0 in the cabinet sheet metal member. At this time, if the circuit breaker is pulled outward, it will not be pulled out of its working position. This prevents charging and improves safety.

[0037] 1 and 6, the locking member 4 is attached to the inside of the housing 6 via an elastic member, and the locking member 4 is provided with a locking boss 41 facing the locking hole 61. The elastic member is provided between the locking member 4 and the housing 6, and the locking member 4 has two operating positions: extended and retracted. The elastic member causes the locking boss 41 of the locking member 4 to protrude from the locking hole 61, and after a retracting external force is applied to the locking member 4 when the circuit breaker is switched off, the locking member 4 causes the locking boss 41 to return to the inside of the housing against the bias force of the elastic member. By having the locking boss 41 of the locking member 4 protrude from the locking hole when the circuit breaker is turned off, it is possible to effectively prevent the circuit breaker from falling out of the cabinet due to vibration during transportation, etc. In addition, an external retracting force is applied to the locking member 4, causing the locking boss 41 to return to the interior of the housing. Therefore, when the circuit breaker is inserted into the cabinet in the switched-off state, the locking boss 41 of the locking member 4 returns to the interior of the housing under the action of the external pressing force applied by the sheet metal member of the cabinet, so that the circuit breaker can be smoothly inserted into the cabinet. Preferably, the cross section of the locking boss 41 of the locking member 4 extending from the locking hole 61 is a right-angled trapezoid or a right-angled triangle, and the locking boss 41 has a vertical surface perpendicular to the side wall of the locking hole 61 and an inclined surface. The vertical surface faces the direction in which the circuit breaker is pulled out of the cabinet, and the inclined surface faces the direction in which the circuit breaker is inserted into the cabinet, making it easier to insert the circuit breaker into the cabinet when the switch is turned off. The elastic member is a compression spring 10. Of course, the elastic member may be an elastic member such as a torsion spring or a leaf spring.

[0038] More preferably, as shown in Fig. 2, when the button mechanism is in the switch-off position, after applying a retracting external force to the locking member 4, the locking boss 41 of the locking member 4 returns to the inside of the housing, and the locking member 4 and the button mechanism interlock with each other, preventing the button mechanism from switching from the switch-off position to the switch-on position, preventing the button 2 from being pressed into place and preventing charging while the circuit breaker is being installed in the cabinet. In a preferred embodiment shown in Fig. 3, the locking member 4 further includes an extending post 42, and the driving member 5 includes a driving stopper 51 that interlocks with the extending post 42. In this embodiment, the driving stopper 51 is a step provided on the side wall of the driving member 5, and of course it can also be a groove or protrusion provided on the driving member 5. When the button mechanism is in the OFF position, the drive stopper 51 of the drive member 5 rotates to a position facing the extending post 42 of the locking member 4. If the circuit breaker is inserted but not installed in the working position, the position of the locking hole 61 of the plug-in circuit breaker deviates from the position of the cabinet locking hole B0. The locking boss 41 of the locking member 4 returns to the interior of the housing under the action of the external pressing force applied by the sheet metal member of the cabinet. The extending post 42 of the locking member 4 extends inside the drive stopper 51 and engages with the drive stopper 51 to prevent the drive member 5 from rotating in the ON direction and prevent the button mechanism from switching from the ON position to the OFF position. Therefore, the circuit breaker cannot be switched on while installed in the cabinet installation position, and charging work is avoided. In this embodiment, the locking member 4 and the drive member 5 cooperate with the stopper to prevent the button mechanism from switching from the ON position to the OFF position. This results in a more optimal layout and a smaller occupied space. Of course, the locking member 4 can cooperate with the button 2 or connecting rod 7 and retainer, for example by restricting a boss or slot on the button 2 so that the button 2 cannot be pushed into the circuit breaker to turn it on. By cooperating with a hook extending on the connecting rod 7 and retainer, the connecting rod 7 cannot be moved in the turn-on direction.

[0039] 5, when the button mechanism is in the switched-on position, the locking boss 41 of the locking member 4 protrudes from the locking hole 61 of the housing 6, and is restricted to the extended position by the button mechanism and cannot return to the inside of the housing, serving as an auxiliary interlocking member to prevent the circuit breaker from being inserted into or pulled out of the cabinet in the switched-on state. (The locking member 4 plays an auxiliary role. Because there is a certain inclination angle between the inclined surface 412 of the locking boss 41 of the locking member and the outer surface of the circuit breaker, even if the locking boss 41 is always exposed, the considerable elasticity of the sheet metal structure of the cabinet will cause the circuit breaker to be pushed in roughly in the switched-on state, causing a hidden safety hazard.) In a preferred embodiment, the driving member 5 has an outer surface 52. When the button mechanism is in the switched-on position, the locking boss 41 of the locking member 4 protrudes from the housing 6, and when the drive stopper 51 of the drive member 5 is rotated and displaced from the extending post 42, the outer surface 52 of the drive member 5 is rotated to a position where it abuts against the extending post 42 of the locking member 4, preventing the locking member 4 from returning to the inside of the housing 6. When the button mechanism is in the switched-off position, the outer surface 52 of the drive member 5 displaces from the locking member 4 and releases the holding mechanism. At this time, the drive stopper 51 of the drive member 5 rotates to a position corresponding to the extending post 42.

[0040] More preferably, after the circuit breaker is switched off, the button mechanism is pulled and moves out of the housing 6. While the button mechanism is being moved out of the housing 6, it causes the locking boss 41 of the locking member 4 to return to the inside of the housing 6. Preferably, while the button mechanism is being moved out of the housing 6, it drives the interlocking member 3, which moves the locking member 4 to release the lock and cause the locking boss 41 to return to the inside of the housing 6. In the preferred embodiment of the locking member 4 shown in Figure 3, the locking member 4 is mounted inside the housing 6 via a linear moving pair, and the linear moving direction is perpendicular to the mounting and insertion direction of the circuit breaker. The locking member 4 is disposed between the button mechanism and the locking hole 61, the locking member 4 is provided with a locking boss 41 at an upper part close to the locking hole 61, an extending post 42 at a lower part close to the button mechanism, and an interlocking step 43 cooperating with the interlocking member 3 on one side of the locking boss 41, and an elastic member is attached between the lower part of the locking member 4 and the housing 6, and the elastic member causes the locking boss 41 of the locking member 4 to protrude from the interlocking hole 61. After the circuit breaker is switched off, while the button mechanism is moving out of the housing 6, the button mechanism drives the interlocking member 3, the interlocking member 3 acts on the interlocking step 43, and the locking member 4 returns the locking boss 41 to the inside of the housing 6 against the elastic force of the elastic member. Obviously, the beneficial effects of this technical means are as follows: First, the locking member 4 moves along a straight line perpendicular to the installation and insertion direction A, which effectively prevents and reduces force deformation and / or minute displacement of the locking member 4 and the sheet metal members of the insertion receiving cabinet. Second, when the driving member 5 is in the switch-on position, the direction of the force applied by the outer surface 52 to the locking member 4 is roughly parallel to its linear movement direction, making it difficult to return the locking member 4 to the retracted position by manual pulling. Second, the bed slide-moving block pair exerts a large restraining force along a direction perpendicular to the horizontal movement, so the alignment between the extending column 42 and the driving stopper 51 effectively ensures that a large restraining force against the switch-on operation is applied to the driving member 5, thereby preventing accidents of switching on the circuit breaker during insertion and extraction operations.

[0041] In a preferred embodiment of the linkage member 3 shown in FIGS. 1 and 6, the linkage member 3 is rotatably mounted on the housing 6 and positioned between the button mechanism 2 and the locking hole 61. The linkage member 3 includes a contact boss 31 and a passive boss 32. When turning on the switch, the button mechanism presses the passive boss 32 so that the contact boss 31 protrudes from the locking hole 61, and the button mechanism and the passive boss 32 engage with each other to prevent the contact boss 31 from returning to the inside of the housing 6. When turning off the switch, the button mechanism releases the engagement with the passive boss 32 and displaces, causing the contact boss 31 to return to the inside of the housing. The button mechanism includes a button 2, a connecting rod 7, and a driving member 5. The button 2 activates the driving member 5 via the connecting rod 7, which is rotatably mounted within the housing 6 and connected to the operating mechanism 9. A first driving unit 20 cooperating with the passive boss 32 is provided on the button 2, and the button 2 drives the operating mechanism via the connecting rod 7 and the driving member 5 to turn on the switch. The first drive part 20 of the button 2 rotates the interlocking member 3 counterclockwise via the passive boss 32, causing the contact boss 31 to extend from the stop hole 61. When the button mechanism is in the switch-on position, the button 2 and the passive boss 32 come into contact with the longitudinal surface 20a (meaning the surface set along the installation and insertion direction A) of the first drive part 20, causing the contact boss 31 to return to the inside of the housing 6, preventing the circuit breaker from being inserted or removed while the switch is on and preventing charging. The button 2 is pulled, driving the operating mechanism via the connecting rod 7 and drive member 5 to turn off the switch. When the button mechanism is in the switch-off position, the first drive part 20 of the button 2 displaces from the passive boss 32 and causes the contact boss 31 to return to the inside of the housing. When the button mechanism is in the switched-off position, the linkage member 3 may be driven by the button mechanism to rotate clockwise to make the contact boss 31 return to the inside of the housing, and of course, a spring may be provided to rotate it clockwise, or under the action of gravity at one end of the contact boss 31 to rotate it clockwise.

[0042] Preferably, the interlocking member 3 further includes a release portion 34 that cooperates with the locking member 4 and an interlocking member driver 33 that cooperates with the button mechanism. When the button mechanism moves out of the housing 6 after the circuit breaker is switched off, the interlocking member driver 33 rotates the interlocking member 3, and the release portion 34 applies force to the locking member 4 to return the locking boss 41 of the locking member 4 to the inside of the housing 6. Specifically, in a preferred embodiment of the interlocking member 3, the interlocking member 3 has a rotation center in the middle, a contact boss 31 on one side of one end close to the locking hole 61, a release portion 34 that cooperates with the locking member 4 on the other side, an interlocking member driver 33 that bends toward the button mechanism on the other end, a passive boss 32 on one side close to the button mechanism between the rotation center and the contact boss 31, and a driver that cooperates with the interlocking member driver 33 on the button mechanism. When the switch is turned off, the button mechanism displaces, releasing the pressing engagement with the passive boss 32 while moving out of the housing 6, and the drive unit of the button mechanism pulls the interlocking member drive unit 33 to rotate the interlocking member 3 and return the contact boss 31 to the inside of the housing. When the button mechanism is in the switch-off position, the button mechanism is pulled to move out of the housing 6, and while the button mechanism continues to move out of the housing 6, the drive unit continues to move and rotate the interlocking member 3, causing the release unit 34 to apply a retracting external force to the locking member 4, causing the locking member 4 to return to the inside of the housing 6.

[0043] In one embodiment, when the button mechanism is in the off position, the button 2 is pulled, causing the interlocking member 3 to continue to rotate clockwise via the interlocking member drive unit 33, pushing the release unit 34 against the interlocking step 43 of the locking member 4 and causing the locking boss 41 of the locking member 4 to return to the inside of the housing 6. After the switch is turned off, the circuit breaker can be smoothly removed by pulling the button 2. In one embodiment, the boss of the button 2 is used as the drive unit, and when the switch is turned off, the bent portion is pulled to return the contact boss 31 of the interlocking member 3 to the inside of the housing. In another embodiment, a return spring is used to rotate the contact boss 31 of the interlocking member 3 in the direction away from the stop hole 61. When the switch is turned off, the button mechanism releases the pressure engagement with the passive boss 32 and displaces, causing the return spring to return the contact boss 31 of the interlocking member 3 to the inside of the housing.

[0044] In a preferred embodiment, the button 2 of the button mechanism includes a button member 21 and a display member 22. The display member 22 cooperates with the interlocking member 3 to display whether the switch is on or off, and returns the locking boss 41 of the locking member 4 to the inside of the housing 6 after the switch is turned off. The display member 22 includes a rotation shaft 221, a display end face 223, and a drive boss 222 provided on the rotation shaft 221. The drive boss 222 cooperates with the interlocking member drive unit 33 of the interlocking member 3 as a drive unit. A display unit for indicating whether the switch is on or off is provided on the display end face 223, and the display unit has a color patch or characters corresponding to the switch on or off indication. A hollow mounting hole 211 is provided inside the button member 21, and an observation window 212 penetrating the mounting hole 211 is provided on the operating end face of the button member 21. The display member 22 is mounted within the mounting hole 211 of the button member 21 via a rotating shaft 22 and is swung about the shaft, causing the display portion of the display end face 223 to move below the observation window 212, thereby indicating the corresponding switch-on / off state. When the circuit breaker is switched on, the button 2 moves into the housing 6 to rotate the display member 22, and the drive boss 222 cooperates with the interlocking member drive part 33 to make the area of ​​the display portion corresponding to the switched-on state on the display end face 223 correspond to the observation window 212. When the circuit breaker is switched off, the button 2 moves out of the housing 6, and the drive boss 222 of the indicator member 22 cooperates with the interlocking member drive part 33 to rotate the indicator member 22 to make the area indicating the switched-off state on the display end face 223 correspond to the area indicating the switched-off state on the observation window 212. At the same time, the driving boss 222 rotates the interlocking member 3 via the interlocking member driving part 33, and when the contact boss 31 returns to the inside of the housing, the release part 34 of the interlocking member 3 no longer pushes the locking member 4 back into the housing 6 (the release part 34 just contacts the interlocking step 43 of the locking member 4 or leaves a gap). After the circuit breaker is switched off, if the button 2 continues to be pulled and moves out of the housing 6, the driving boss 222 rotates the interlocking member 3 via the interlocking member driving part 33, and the release part 34 applies force to the locking member 4 to return it to the inside of the housing 6.

[0045] In this embodiment, when the circuit breaker is switched on, the first driving portion 20 of the button 2 cooperates with the passive boss 32 of the interlocking member to move the contact boss 31 of the interlocking member to protrude from the housing 6. In another embodiment, the display member 22 may move the contact boss 31 of the interlocking member 3 to protrude from the housing 6. That is, when the button 2 moves into the housing 6 to switch off the circuit breaker (see FIG. 9 ), the driving boss 222 of the display member 22 cooperates with the interlocking member driving portion 33 of the interlocking member 3, the indicating member 22 rotates to make the area indicating the switched-on state on the display end face 223 correspond to the area indicating the switched-on state on the observation window 212, and the interlocking member 3 rotates to make the contact boss 31 of the interlocking member 3 protrude from the housing 6.

[0046] 7-9, the driving boss 222 is provided on one side of the rotating shaft 221, and the driving boss 222 protrudes from the button 2 to cooperate with the interlocking driving part 33. Of course, the interlocking member driving part 33 may be bent and extend into the inside of the button 2 to cooperate with the driving boss 222. In addition, the driving boss 222 may not be provided on the rotating shaft 221, but may be provided on one side of a connecting rod between the rotating shaft 221 and the display end face 223, for example.

[0047] Preferably, the left passive end 222b and the right passive end 222a are spaced apart on the drive boss 222 of the indicator 22, and the linkage member drive portion 33 of the linkage member 3 is bent to one side of the button 2 and located between the left passive end 222b and the right passive end 222a. When the button 2 is pressed toward the inside of the circuit breaker to turn on the switch, the inclined surface of the left passive end 222b rotates counterclockwise under the resistance of the linkage member drive portion 33, and a switch-on indicator of a color corresponding to the display unit on the display end surface 223 is displayed in the observation window 212. The corresponding switch-on / off state is indicated by a color patch moving into the observation window 212. This technical solution has a simple structure and, in combination with the above, can simplify the release structure. When the button 2 is pulled to turn off the switch, the right passive end 222a of the indicator acts on the right side surface of the indicator driving part 33 of the indicator 3, and the indicator 22 rotates clockwise around its axis, causing the contact boss 31 of the indicator to return to the inside of the housing. The indicator 22 rotates clockwise, and a switch-off indicator of a color corresponding to the display part on the indicator end surface 223 is displayed in the observation window 212. The release part 34 of the indicator 3 may just come into contact with the locking member 4 or may leave a gap, causing the locking boss 41 of the locking member 4 to continue protruding outside the housing 6.

[0048] 8, in the switched-off state, if the circuit breaker needs to be removed from the mounting cabinet, by continuing to pull the button mechanism away from the circuit breaker, the right passive end 222a of the indicator member will act on the right side surface of the interlocking member drive part 33 of the interlocking member 3, causing the interlocking member 3 to rotate clockwise around its axis. The release part 34 will act on the interlocking part 43 of the locking member 4, causing the locking boss 41 to slide and retract into the circuit breaker against the thrust of the spring 10, releasing the lock between the locking boss 41 and the cabinet, and allowing the circuit breaker to be removed from the working position. The beneficial effects are as follows: First, the indicator mechanism is directly interlocked with the insertion / removal safety protection mechanism, so that there is a direct and fixed correspondence between the switch-on / off indication and the extended / retracted positions of the locking boss 41 and the contact boss 31, allowing the operator to intuitively grasp the current safety state of the circuit breaker. Secondly, by allowing the contact boss 31 and the locking boss 41 on the locking member 4 to extend and retract from the common fastening hole 61, it is possible to reduce the difficulty in manufacturing the insert receptacle, thereby achieving compatibility and commonality between the circuit breaker product and the insert receptacle, thereby reducing the user's usage costs. Secondly, the simple structure and small number of parts effectively support the miniaturization and low-cost manufacturing of circuit breaker products.

[0049] Preferably, the contact boss 31 is cubic, with both side surfaces of the cubic boss perpendicular to the circuit breaker installation and insertion direction, and the side surfaces of the contact boss 31 are left contour surface 31a and right contour surface 31b, respectively. When the contact boss 31 is in the extended position, the left contour surface 31a and right contour surface 31b are perpendicular to the side walls of the fastening hole 61, i.e., perpendicular to the circuit breaker installation and insertion direction. The left contour surface 31a prevents the circuit breaker from being pulled out of the cabinet in the direction in which the circuit breaker is pulled out of the cabinet, while the right contour surface 31b prevents the circuit breaker from being inserted into the cabinet in the direction in which the circuit breaker is inserted into the cabinet. The right contour surface 31b is mated with a lateral end surface B1 of the sheet metal member of the cabinet of the insertion receptacle, and the left contour surface 31a is mated with a hole wall surface B2 of the fastening hole B0 of the sheet metal member of the cabinet of the insertion receptacle. The beneficial effects thereof are as follows. The force deformation of the insertion receptacle can be effectively reduced, and the adaptability resistance of the insertion receptacle can be effectively alleviated, which makes it more efficient and easier to use, and reduces the cost of use. Preferably, the side of the passive boss 32 that is close to the button 2 is an inclined surface.

[0050] In a preferred embodiment of the plug-in circuit breaker of the present invention, specifically shown in Figure 1, the button mechanism includes a button 2, a connecting rod 7, and a driving member 5. The button 2 operates the driving member 5 via the connecting rod 7, and the driving member 5 moves the operating mechanism 9 via the connecting rod 7 to perform on / off switching. The button mechanism and the driving member 5 each have a switch-on / off position corresponding to the on / off switching position of the circuit breaker. That is, in the on state, the button mechanism and the driving member 5 each have a specific position (on position), and in the off state, the button mechanism and the driving member 5 also have a specific position (off position). The switch-on position / off position corresponds to the opening and closing of the movable contact 9a and the fixed contact 9b.

[0051] A stop hole 61 is provided in the housing 6, the locking member 4 is slidably provided between the drive member 5 and the stop hole 61 at a position corresponding to the drive member 5, and the interlocking member 3 is rotatably provided between the button 2 and the stop hole 61. The interlocking member 3 is provided on the left side of the locking member 4 and located above the button mechanism.

[0052] One of the advantageous technical features of the present invention is that when the button mechanism is in the on position, the contact boss of the interlocking member is held in the extended position by the button mechanism and does not return to the retracted position. This advantageous effect is as follows: it reliably prevents insertion and removal of the switch on, i.e., it prevents the circuit breaker from being roughly inserted or removed when switched on. The feature provided in the structure of not returning to the retracted position effectively strengthens the circuit breaker's ability to resist abnormal and rough removal. There are various technical solutions for the position of the interlocking member 3 when the button mechanism is in the off position. One possible solution is that the interlocking member 3 is not restricted by the button mechanism and can be switched between the retracted and extended positions, which has the advantageous effect of a simple structure. Another possible solution, which is the preferred solution of the present invention, is that when the button mechanism is in the off position, the interlocking member 3 is restricted by the button mechanism to be in the retracted position. This advantageous effect directly avoids the interlocking member 3 from resisting normal insertion and removal of the circuit breaker. Another advantage of the device according to the present invention is that the interlocking member 3 is used as the release member, which simplifies the structure of the release mechanism and reduces the number of parts, and since the interlocking member 3 and the locking member 4 are retracted simultaneously, the interlocking member 3 and the locking member 4 do not provide any resistance to the normal insertion and extraction of the circuit breaker.

[0053] Another advantageous technical feature of the present invention is that when the circuit breaker is in the switched-off state, the locking boss 41 of the locking member 4 protrudes from the housing 6, but can be pushed back into the housing 6 only when it is subjected to an external retraction force (the locking member 4 cannot be retracted by horizontal force alone, but requires a vertical component of force in the retraction direction). This means that in addition to preventing the circuit breaker from being inserted into the cabinet in the switched-off state, it also prevents the circuit breaker from falling out of the cabinet due to vibration during transportation, etc. Another advantageous technical feature of the present invention is that when the button mechanism is in the switched-off position, when the locking boss 41 of the locking member 4 returns to the inside of the housing, the locking member 4 resists the button mechanism 5, preventing the button mechanism from switching from the switched-off position to the switched-on position, and the circuit breaker cannot be switched on. Another beneficial technical feature of the present invention is that when the button mechanism is in the switched-on position, the locking member 4 is stopped in the extended position by the driving member 5 and does not return to the retracted position, which together with the interlocking member 3 as an auxiliary mechanism certainly prevents the circuit breaker from being roughly withdrawn in the switched-on state. Due to the feature provided in the structure that it does not return to the retracted position, the ability of the circuit breaker product to resist abnormal rough withdrawal is effectively strengthened.

[0054] The locking member 4 of the present invention has the following beneficial effects. First, because the locking member 4 moves along a straight line perpendicular to the installation and insertion direction A, it effectively prevents force deformation and / or minute displacement of the locking member 4 and the sheet metal members of the insertion receiving cabinet. Second, when the driving member 5 is in the switched-on position, the direction of the force applied by the outer surface 52 to the locking member 4 is roughly parallel to the direction of its linear movement, making it difficult to return the locking member 4 to the retracted position by manual pulling. Second, because the bed slide-moving block pair exerts a large restraining force along a direction perpendicular to the horizontal movement, the alignment between the extending column 42 and the driving stopper 51 effectively ensures that a large restraining force against switching on is applied to the driving member 5, thereby preventing accidents of switching on the circuit breaker during insertion and extraction operations.

[0055] As mentioned above, the present invention will be further described in detail in combination with certain preferred embodiments, but the specific examples of the present invention cannot be considered 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 plug-in type circuit breaker comprising a housing (6), a button mechanism and an actuation mechanism (9), the button mechanism moving the actuation mechanism (9) for switch-on / switch-off operation, the button mechanism having switch-on / switch-off positions corresponding to switch-on / switch-off states of the circuit breaker, The circuit breaker includes an interlocking member (3) and a locking member (4) provided on the housing (6), the interlocking member (3) is provided with a contact boss (31), and the locking member (4) is provided with a locking boss (41), When the button mechanism is in the switched-on position, the contact boss (31) of the interlocking member (3) protrudes from the housing (6) and is restricted to an extended position by the button mechanism (2) and cannot return to the inside of the housing (6); When the button mechanism is in the switched-off position, the contact boss (31) of the interlocking member (3) returns to the inside of the housing (6), and the locking boss (41) of the locking member (4) protrudes from the housing (6), and after a retracting external force is applied to the locking member (4), the locking boss (41) of the locking member (4) is pushed back into the inside of the housing (6) by the retracting external force. A plug-in type circuit breaker.

2. When the button mechanism is in the switched-off position, when the locking boss (41) of the locking member (4) returns to the inside of the housing (6) under the action of a retracting external force, the locking member (4) and the button mechanism are pressed against each other to prevent the button mechanism from switching from the switched-off position to the switched-on position.

2. The plug-in type circuit breaker according to claim 1.

3. When the button mechanism is in the switched-on position, the locking boss (41) of the locking member (4) protrudes from the housing and is restricted to an extended position by the button mechanism so as not to return to the inside of the housing.

2. The plug-in type circuit breaker according to claim 1.

4. After the circuit breaker is switched off, the button mechanism is pulled and moves to the outside of the housing (6), and while the button mechanism is moving to the outside of the housing (6), the locking boss (41) of the locking member (4) is returned to the inside of the housing (6).

2. The plug-in type circuit breaker according to claim 1.

5. While the button mechanism is moving to the outside of the housing (6), the button mechanism drives the interlocking member (3), and the interlocking member (3) moves the locking member (4) to release the lock, thereby causing the locking boss (41) to return to the inside of the housing (6).

5. The plug-in type circuit breaker according to claim 4.

6. The interlocking member (3) is rotatably provided on the housing (6), and the interlocking member (3) includes a release section (34) that cooperates with the locking member (4) and an interlocking member drive section (33) that cooperates with the button mechanism. When the button mechanism moves to the outside of the housing (6), the interlocking member drive section (33) rotates the interlocking member (3), and the release section (34) applies force to the locking member (4) to return the locking boss (41) of the locking member (4) to the inside of the housing (6).

6. The plug-in type circuit breaker according to claim 5.

7. The button mechanism includes a button (2), a connecting rod (7) and a driving member (5), the button (2) operates the driving member (5) via the connecting rod (7), and the driving member (5) is rotatably provided within the housing (6) and is connected to the operating mechanism (9).

2. The plug-in type circuit breaker according to claim 1.

8. When the button mechanism is in a switched-on position, the locking boss (41) of the locking member (4) protrudes from the housing (6), and the outer surface (52) of the driving member (5) engages with the locking member (4) to prevent the locking member (4) from returning to the inside of the housing (6); when the button mechanism is in a switched-off position, the outer surface (52) of the driving member (5) displaces from the locking member (4) to release the engagement.

8. The plug-in type circuit breaker according to claim 7.

9. The locking member (4) has an extending post (42), and the driving member (5) has a drive stopper portion (51) that matches with the extending post (42). When the button mechanism is in the switched-off position, the drive stopper portion (51) of the driving member (5) faces the extending post (42) of the locking member (4). When the locking boss (41) of the locking member (4) returns to the inside of the housing (6), the extending post (42) of the locking member (4) matches with the drive stopper portion (51) to prevent the driving member (5) from rotating in the switch-on direction, and prevents the button mechanism from switching from the switched-off position to the switched-on position.

8. The plug-in type circuit breaker according to claim 7.

10. The locking member (4) is attached to the inside of the housing (6) via an elastic member, the elastic member being provided between the locking member (4) and the housing (6), and the elastic member causes the locking boss (41) of the locking member (4) to protrude from the housing.

2. The plug-in type circuit breaker according to claim 1.

11. The cross section of the locking boss (41) of the locking member (4) is a right-angled trapezoid or a right-angled triangle, and the locking boss (41) has a vertical surface and an inclined surface, the vertical surface faces the direction in which the circuit breaker is pulled out from the cabinet and is perpendicular to the mounting and insertion direction of the circuit breaker, and the inclined surface faces the direction in which the circuit breaker is inserted into the cabinet.

11. The plug-in circuit breaker according to claim 10.

12. The interlocking member (3) includes a contact boss (31) and a passive boss (32). When the switch is turned on, the button mechanism presses the passive boss (32) so that the contact boss (31) protrudes from the housing, and the button mechanism and the passive boss (32) engage in a pressing engagement to prevent the contact boss (31) from returning to the inside of the housing (6). When the switch is turned off, the button mechanism releases the pressing engagement with the passive boss (32) and displaces, and the contact boss (31) returns to the inside of the housing.

2. The plug-in type circuit breaker according to claim 1.

13. The housing (6) is provided with a stop hole (61), and the contact boss (31) of the interlocking member (3) and the locking boss (41) of the locking member (4) are aligned with the same stop hole (61).

2. The plug-in type circuit breaker according to claim 1.

14. The button mechanism includes a button (2), a connecting rod (7), and a driving member (5), the button (2) operates the driving member (5) via the connecting rod (7), the driving member (5) is rotatably provided within the housing (6) and connected to the operating mechanism (9), a first driving part (20) cooperating with the passive boss (32) is provided on the button (2), when the button mechanism is in a switched-on position, the button (2) and the passive boss (32) abut against the first driving part (20), and when the button mechanism is in a switched-off position, the first driving part (20) of the button (2) is displaced from the passive boss (32).

13. The plug-in circuit breaker according to claim 12.

15. The collision boss (31) is cubic, and has a left contour surface (31a) and a right contour surface (31b). When the collision boss (31) is in an extended position, the left contour surface (31a) and the right contour surface (31b) are perpendicular to the mounting and inserting directions of the circuit breaker, respectively, and the left contour surface (31a) prevents the circuit breaker from being pulled out of the cabinet along the direction in which the circuit breaker is pulled out of the cabinet, and the right contour surface (31b) prevents the circuit breaker from being inserted into the cabinet along the direction in which the circuit breaker is inserted into the cabinet.

13. The plug-in circuit breaker according to claim 12.

16. The housing (6) is provided with a locking hole (61) arranged on the locking boss (41), the locking member (4) is attached to the inside of the housing (6) via a linear movement pair, the linear movement direction of which is perpendicular to the mounting and insertion direction of the circuit breaker, the locking member (4) is provided between the button mechanism and the locking hole (61), the locking boss (41) is provided at an upper part of the locking member (4) close to the locking hole (61), an extending pillar (42) is provided at a lower part of the locking member (4) close to the button mechanism, and an interlocking step (43) is provided on one side of the locking boss (41).

2. The plug-in type circuit breaker according to claim 1.

17. The interlocking member (3) has a rotation center at its center, the contact boss (31) at one side of one end, a release portion (34) that cooperates with the locking member (4) at the other side, and an interlocking member drive portion (33) at the other end. The passive boss (32) is provided on one side close to the button mechanism between the rotation center and the contact boss (31); the button mechanism has a drive portion that cooperates with the interlocking member drive portion (33), and when the switch is turned off, the button mechanism releases the pressing engagement with the passive boss (32) while moving to the outside of the housing (6). The button mechanism is displaced by pulling the interlocking member driving part (33) to rotate the interlocking member (3) and return the contact boss (31) to the inside of the housing; when the button mechanism is in the switch-off position, the button mechanism is pulled to move to the outside of the housing (6), and while the button mechanism continues to move to the outside of the housing (6), the driving part continues to move and rotate the interlocking member (3), causing the release part (34) to apply a retracting external force to the locking member (4) and return the locking member (4) to the inside of the housing (6).

13. The plug-in circuit breaker according to claim 12.

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