Plug-in circuit breaker

Abstract

A plug-in circuit breaker comprises a shell, a button mechanism and an operating mechanism, wherein the button mechanism drives the operating mechanism to perform closing / opening, the button mechanism has a closing position and an opening position, a limiting hole is provided on the shell, and the circuit breaker further comprises a locking member arranged in the shell, the locking member is provided with a locking boss arranged corresponding to the limiting hole, when the button mechanism is in the closing position, the locking boss of the locking member extends out of the limiting hole, and is restricted by the button mechanism and cannot be retracted into the shell; when the button mechanism is in the opening position, the locking boss of the locking member extends out of the limiting hole, an external force is applied to the locking member, the locking boss of the locking member can be retracted into the shell, and the locking member restricts the button mechanism from performing the closing operation so that the circuit breaker cannot complete the closing action, can prevent the circuit breaker from being plugged in and out in the closed state, and the circuit breaker from being closed during the installation process, and has a simple structure and high reliability.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage terminal electrical appliances, in particular to a plug-in circuit breaker. Background Art

[0002] With the rapid development of network communication technology, especially the popularization of 5G network, the requirements for circuit breakers to effectively improve the safety of electrical equipment are getting higher and higher. The traditional power supply method of connecting many sockets and plug boards with one terminal circuit breaker is far from meeting the requirements of safe electricity use and equipment protection. For example, the terminal circuit breakers used in 5G communication equipment not only need to be upgraded and improved in terms of miniaturization, intelligence, reliability, stability and other performance, but also have developed many new matching structures in terms of usage requirements. For example, the circuit breaker is required to be easy to plug and unplug like a plug and can be locked in the installation position. This new type of circuit breaker is called a plug-in circuit breaker. The use of the new plug-in circuit breaker can not only provide various safety protection performances of the circuit breaker for power lines and electrical equipment, but also meet the power quality needs of different electrical equipment, and enable the circuit breaker to be conveniently installed / removed from the circuit in a plug-in manner.

[0003] Existing plug-in circuit breakers are usually provided with a locking device, the locking protrusion of which extends out of the circuit breaker housing when the circuit breaker is in the closed state, preventing the circuit breaker from being inserted or removed in the closed state. However, the existing locking device has many parts and a complex structure, which is not conducive to the miniaturization design and reliability of the circuit breaker. Summary of the invention

[0004] The object of the present invention is to provide a plug-in circuit breaker with simple structure and high reliability.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] A plug-in circuit breaker comprises a housing, a button mechanism and an operating mechanism, wherein the button mechanism drives the operating mechanism to execute closing / opening, the button mechanism has a closing position and an opening position corresponding to the closing / opening state of the circuit breaker, a limiting hole is provided on the housing, and the circuit breaker further comprises a locking member arranged in the housing, the locking member is provided with a locking boss arranged corresponding to the limiting hole, when the button mechanism is in the closing position, the locking boss of the locking member extends out of the limiting hole and is restricted by the button mechanism and cannot be retracted into the housing; when the button mechanism is in the opening position, the locking boss of the locking member extends out of the limiting hole, a retraction external force is applied to the locking member, the locking boss of the locking member can be retracted into the housing, and the locking member restricts the button mechanism from performing the closing operation so that the circuit breaker cannot complete the closing action.

[0007] Preferably, the locking member is installed in the shell for linear movement, and the direction of its linear movement is perpendicular to the installation and insertion direction of the circuit breaker. An elastic member is connected between the locking member and the shell, and the elastic force of the elastic member drives the locking boss of the locking member to extend out of the shell. When the button mechanism is in the opening position, a retraction force is applied to the locking member, and the locking member overcomes the elastic force of the elastic member to make the locking boss retreat into the shell.

[0008] Preferably, the button mechanism comprises a button, a connecting rod and a driving member, the button drives the driving member to move via the connecting rod, and the driving member is rotatably disposed in the housing and connected to the operating mechanism.

[0009] Preferably, a limit end is provided on the locking member, and a limit surface is provided on the driving member. When the button mechanism is in the closing position, the limit surface and the limit end are relatively resisted and cooperated, so that the locking boss of the locking member cannot be retreated into the shell; when the button mechanism is in the opening position, the limit surface and the limit end are misaligned to avoid and release the resisting cooperation, and when a retraction force is applied to the locking member, the locking boss of the locking member retreats into the shell.

[0010] Preferably, a limit end is provided on the locking member, and a drive limit portion is provided on the driving member. When the button mechanism is in the opening position, the drive limit portion is opposite to the limit end. When the locking boss of the locking member is retracted into the shell, the limit end and the drive limit portion cooperate to prevent the driving member from rotating in the closing direction, thereby preventing the button mechanism from switching from the opening position to the closing position.

[0011] Preferably, it also includes an unlocking member, on which is provided an unlocking portion cooperating with the locking member. After the circuit breaker is opened, the button continues to be pulled, and the button mechanism drives the unlocking member to move. The unlocking portion of the unlocking member applies a retraction force to the locking member to make the locking boss retreat into the shell.

[0012] Preferably, the button is provided with an unlocking arm cooperating with the locking piece. After the circuit breaker is opened, the button is continuously pulled, and the unlocking arm applies a retracting force to the locking piece to make the locking boss retreat into the housing.

[0013] Preferably, the locking member is provided with a locking boss at the upper portion close to the limiting hole, a limiting end extending downward is provided at the lower portion close to the button mechanism, and a linkage unlocking portion is provided on one side of the locking boss.

[0014] Preferably, the unlocking member is rotatably arranged in the shell, and an unlocking part cooperating with the locking member is provided in the direction of the unlocking member pointing to the locking member, and a bent end is provided at the other end of the unlocking member. The button mechanism drives the unlocking member to rotate through the bent end so that the unlocking part applies force to the locking member to make the locking boss retreat into the shell.

[0015] Preferably, the button comprises a button member for operation and an indicator member in the button member, the indicator member comprises a rotating shaft, a display end face and a driving boss arranged on the rotating shaft, an indicator portion used as a switch opening and closing mark is arranged on the display end face, a cavity-type mounting hole is arranged inside the button member, an observation window which is intersecting with the mounting hole is arranged on the operating end face of the button member, the indicator member is mounted in the mounting hole of the button member through the rotating shaft and can swing around the shaft, the swing drives the indicator portion on the display end face to move under the observation window, and the indicator portion moving into the observation window displays the corresponding The driving boss is exposed outside the button member, and the unlocking member is provided with a corresponding bent end, the bending direction of the bent end is toward the driving boss side of the indicator member. When the circuit breaker is closed, the button moves into the shell, and the driving boss cooperates with the bent end to rotate the indicator member, so that the area of ​​the indicator on the display end surface corresponding to the closing state corresponds to the observation window; after the circuit breaker is opened, the button is pulled away from the circuit breaker, and the driving boss drives the unlocking member to rotate through the bent end, and the unlocking member applies force to the locking member to make the locking boss retreat into the shell.

[0016] The plug-in circuit breaker of the present invention is provided with a locking piece. When the button mechanism is located at the closing position, the locking boss of the locking piece extends out of the limiting hole and is restricted by the button mechanism and cannot be retracted into the shell, so that the circuit breaker cannot be inserted into the cabinet in the closing state, or cannot be pulled out after being installed in the working position of the cabinet; and when the button mechanism is in the opening position, the locking boss of the locking piece extends out of the limiting hole, which can protect the circuit breaker from falling out of the cabinet due to vibration during transportation and the like. In the opening state, a retracting external force is applied to the locking piece, and the locking boss can be retracted into the shell. At the same time, the locking piece restricts the button mechanism from performing the closing operation, so that the plug-in circuit breaker can be normally inserted into the working position of the cabinet, and when the button mechanism is not installed in the correct working position during the insertion process, the button mechanism cannot complete the closing action. Multiple protections are achieved through one locking piece. Only when the circuit breaker is installed in the correct working position, the button mechanism can be normally opened and closed. The structure is simple and the reliability is high.

[0017] In addition, the plug-in circuit breaker of the present invention is also provided with an unlocking member driven by a button mechanism. If the circuit breaker is to be pulled out of the cabinet after opening, the button mechanism applies force to the locking member through the unlocking member, so that the locking boss is retracted into the housing, thereby the circuit breaker can be pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the plug-in circuit breaker of the present invention when it is installed in the working position of the cabinet.

[0019] Figure 2 It is a partial enlarged schematic diagram of the button mechanism, driving part, locking part and unlocking part in the open state.

[0020] Figure 3It is a partially enlarged schematic diagram of the locking member being forced back into the housing in the open state.

[0021] Figure 4 It is a schematic diagram of the structure of the button mechanism, the unlocking part and the locking part.

[0022] Figure 5 It is a partial enlarged schematic diagram of the unlocking member and the locking member of the first embodiment.

[0023] Figure 6 It is a partial enlarged schematic diagram of the unlocking member and the locking member of the second embodiment.

[0024] Figure 7 It is a partially enlarged schematic diagram of the cooperation between the opening state indicator and the unlocking member.

[0025] Figure 8 It is a partial enlarged schematic diagram of the coordination between the closing status indicator and the unlocking member. DETAILED DESCRIPTION

[0026] The following is combined with Figures 1 to 8 The following embodiments are provided to further illustrate the specific implementation of the plug-in circuit breaker of the present invention. The plug-in circuit breaker of the present invention is not limited to the description of the following embodiments.

[0027] like Figure 1 As shown, the plug-in circuit breaker of the present invention includes a housing 6, a button mechanism, an operating mechanism 9 driven and connected to the button mechanism, a moving contact connected to the operating mechanism 9, and a static contact arranged opposite to the moving contact, and generally also includes (but is not limited to) a short-circuit protection mechanism, an arc extinguishing device, an overload protection mechanism, an outgoing line connection device, an incoming line connection device and other parts and components of a circuit breaker (not shown in the figure). The button mechanism drives the operating mechanism 9 to drive the moving contact and the static contact to contact and close, or drives the operating mechanism 9 to drive the moving contact and the static contact to separate and open. The button mechanism has a closing position and an opening position corresponding to the closing / opening state of the circuit breaker.

[0028] The plug-in circuit breaker is also provided with a locking device, a limiting hole 61 cooperating with the locking device is provided on the housing 6, and a cabinet limiting hole is provided on the sheet metal part where the plug-in circuit breaker is inserted into the working position of the cabinet (see Figure 1 ), when the plug-in circuit breaker is installed to the working position, the limit hole 61 of the plug-in circuit breaker corresponds to the limit hole B0 of the cabinet. When the plug-in circuit breaker is not installed to the working position, the limit hole 61 of the plug-in circuit breaker is misaligned with the limit hole B0 of the cabinet, and the cabinet sheet metal part B will block the cabinet limit hole B0. This is the prior art in the field and will not be described in detail here.

[0029] like Figure 1As shown, an embodiment of the plug-in circuit breaker of the present invention comprises a housing 6 provided with a limit hole 61, a button mechanism and an operating mechanism 9. The button mechanism drives the operating mechanism 9 to perform closing / opening. The button mechanism has a closing position and an opening position corresponding to the closing / opening state of the circuit breaker. The button mechanism comprises a button 2, a connecting rod 7 and a driving member 5. The button 2 triggers the driving member 5 to move through the connecting rod 7. The driving member 5 is rotatably arranged in the housing 6 and connected to the operating mechanism 9. When the button 2 is pressed, the button 2 drives the driving member 5 to rotate to one side through the connecting rod 7. The driving member 5 drives the operating mechanism 9 through the U-shaped rod 8 to drive the moving contact to contact with the static contact to realize closing. When the button 2 is pulled out, the button 2 drives the driving member 5 to rotate to the other side through the connecting rod 7. The driving member 5 drives the operating mechanism 9 through the U-shaped rod 8 to drive the moving contact to separate from the static contact to realize opening. The function of the driving member 5 is similar to the handle of a traditional small circuit breaker. The operating mechanism usually includes a contact support, a lock and a tripping lock connected to the moving contact. The short-circuit protection mechanism and the overload protection mechanism are arranged corresponding to the lock of the operating mechanism. When a short circuit or overload occurs, they act on the lock to trip the operating mechanism and open the circuit breaker to achieve protection.

[0030] An improvement of the present invention is that the circuit breaker also includes a locking device that cooperates with the limiting hole 61, and the locking device includes a locking piece 4 arranged in the housing 6, and the locking piece 4 is provided with a locking boss 41 corresponding to the limiting hole 61. The locking piece 4 is provided with a locking boss 41 corresponding to the limiting hole 61. When the button mechanism is in the closing position, the locking boss 41 of the locking piece 4 extends out of the limiting hole 61 and is restricted by the button mechanism and cannot be retreated into the housing 6; when the button mechanism is in the opening position, the locking boss 41 of the locking piece 4 extends out of the limiting hole 61, and a retraction force is applied to the locking piece 4, so that the locking boss 41 of the locking piece 4 can be retreated into the housing 6, and the locking piece 4 restricts the button mechanism from performing the closing operation so that the circuit breaker cannot complete the closing action.

[0031] The plug-in circuit breaker of the present invention is provided with a locking piece. When the button mechanism is located at the closing position, the locking boss of the locking piece extends out of the limiting hole and is restricted by the button mechanism and cannot be retracted into the shell, so that the circuit breaker cannot be inserted into the cabinet in the closing state, or cannot be pulled out after being installed in the working position of the cabinet; and when the button mechanism is in the opening position, the locking boss of the locking piece extends out of the limiting hole, which can protect the circuit breaker from falling out of the cabinet due to vibration during transportation and the like. In the opening state, a retracting external force is applied to the locking piece, and the locking boss can be retracted into the shell. At the same time, the locking piece restricts the button mechanism from performing the closing operation, so that the plug-in circuit breaker can be normally inserted into the working position of the cabinet, and when the button mechanism is not installed in the correct working position during the insertion process, the button mechanism cannot complete the closing action. Multiple protections are achieved through one locking piece. Only when the circuit breaker is installed in the correct working position, the button mechanism can be normally opened and closed. The structure is simple and the reliability is high.

[0032] like Figure 1 As shown, the locking member 4 is linearly movable and installed in the housing 6, and the direction of its linear movement is perpendicular to the installation and insertion direction of the circuit breaker. An elastic member 44 is connected between the locking member 4 and the housing 6, and the elastic force of the elastic member 44 drives the locking boss 41 of the locking member 4 to extend out of the housing 6. When the button mechanism is in the off position, the locking member 4 is in a freely retractable position to facilitate the easy insertion of the circuit breaker into the cabinet; when a retracting external force is applied to the locking member 4, the locking member 4 overcomes the elastic force of the elastic member 44 to make the locking boss 41 retract into the housing 6, and at the same time, the locking member 4 restricts the button mechanism from performing the closing operation so that the circuit breaker cannot complete the closing action.

[0033] like Figure 2-3 As shown, the locking member 4 is provided with a locking boss 41 at the upper part near the limiting hole 61, and a limiting end 42 extending downward and protruding is provided at the lower part near the button mechanism. When the button mechanism is in the off position, the driving limiting portion 51 is opposite to the limiting end 42 (see Figure 2 ), at this time, the driving limit portion 51 and the limit end 42 are not in contact with each other, and the circuit breaker can be normally opened and closed. When the locking boss 41 of the locking member 4 is returned to the housing 6, the limit end 42 and the driving limit portion 51 are in limit cooperation (see Figure 3 ), the driving limit portion 51 is a step, and the limit end 42 extends into one side of the step to prevent the driving member 5 from rotating in the closing direction, thereby preventing the button mechanism from switching from the opening position to the closing position. At this time, the circuit breaker cannot be closed.

[0034] like Figure 2 As shown, a limiting surface 52 is also provided on the driving member 5. When the button mechanism is in the closing position, the limiting surface 52 and the limiting end 42 are relatively blocked and cooperated, so that the locking boss 41 of the locking member 4 cannot be retreated into the shell 6; when the button mechanism is in the opening position, the limiting end 42 is opposite to the driving limiting portion 51, and the limiting surface 52 and the limiting end 42 are offset to avoid and release the blocking cooperation. When a retraction force is applied to the locking member 4, the locking boss 41 of the locking member 4 can be retreated into the shell 6.

[0035] Preferably, 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 includes a straight surface and an inclined surface, the straight surface faces the direction of the circuit breaker being pulled out of the cabinet and is perpendicular to the installation and insertion direction of the circuit breaker, and the inclined surface faces the direction of the circuit breaker being inserted into the cabinet. In this embodiment, the drive limit portion 51 is a step arranged on the side wall of the drive member 5, and it is obvious that the drive member 5 can also be a groove or a protrusion. The limit end 42 is a protruding limit arm, and it is obvious that it can also be a limit groove or other structures. The elastic member 44 is a compression spring, and of course it can also be a torsion spring or an elastic member of other structures.

[0036] like Figure 1-3 In the embodiment shown, when the button mechanism is in the off position, the locking member 4 is in a freely retractable position to facilitate the easy insertion of the circuit breaker into the cabinet; during the insertion process, when the circuit breaker is inserted into the cabinet but not installed to the normal working position, the locking member 4 is restricted by the cabinet to be in a retracted position, and the locking drive member 5 cannot complete the closing action. Only when the circuit breaker is installed to the correct position, the locking member 4 is in an extended position, the restriction on the locking drive member 5 is released, and the button mechanism can perform the closing operation. If the circuit breaker is in the closed state, the locking member 4 is in the extended position and is restricted by the drive member 5 in the extended position and cannot be retracted to the retracted position, so as to ensure that when the circuit breaker is in the closed state, the locking member of the circuit breaker is restricted by the cabinet and cannot be installed in the cabinet or pulled out from the cabinet.

[0037] In this embodiment, the locking member 4 is limitedly matched with the driving member 5. As another embodiment, the locking member 4 can also be limitedly matched with the button 2 or the connecting rod 7. For example, in one embodiment, the button 2 is provided with a limit arm extending toward the locking member 4 and matched with the locking member 4. In the closed state, the limit arm is opposite to the limit end 42 of the locking member 4, so that the locking member 4 cannot be returned to the housing. In the open state, when the locking member 4 is forced to return to the housing, the limit end 42 extends to one side of the limit arm so that the button 2 cannot move in the closing direction.

[0038] Furthermore, the plug-in circuit breaker of the present invention further comprises an unlocking member 3. After the circuit breaker is opened, the button mechanism applies force to the locking member through the unlocking member, so that the locking boss returns to the housing, thereby safely pulling the circuit breaker out of the cabinet. The unlocking member 3 is provided with an unlocking portion 31 that cooperates with the locking member 4. After the circuit breaker is opened, the button 2 is continuously pulled, and the button mechanism drives the unlocking member 3 to move. The unlocking portion 31 of the unlocking member 3 applies force to the locking member 4 to return the locking boss 41 to the housing 6. As another embodiment that does not use a separate unlocking member 3, an unlocking arm that cooperates with the locking member 4 can also be provided on the button 2, and a corresponding driving inclined surface can be provided on the unlocking arm. After the circuit breaker is opened, the button 2 is continuously pulled, and the unlocking arm applies force to the locking member 4 to return the locking boss 41 to the housing 6.

[0039] like Figure 4-6 As shown, the unlocking member 3 is rotatably arranged in the shell 6, and the unlocking member 3 is provided with an unlocking portion 31 that cooperates with the locking member 4 and points to the direction of the locking member 4. The locking member 4 is provided with a linkage unlocking portion 43 that cooperates with the unlocking portion 31. The other end of the unlocking member 3 is a bent end 32 bent toward the button mechanism. The button mechanism drives the unlocking member 3 to rotate through the bent end 32 so that the unlocking portion 31 applies force to the locking member 4 to make the locking boss 41 retreat into the shell 6.

[0040] An embodiment of a button mechanism driving an unlocking member 3, wherein an unlocking protrusion is provided on the button 2. After the circuit breaker is opened, the button 2 is continued to be pulled, and the unlocking protrusion on the button 2 drives the bent end 32 to make the unlocking member 3 rotate clockwise, and the unlocking portion 31 applies force to the linkage unlocking portion 43 of the locking member 4 to compress the spring so that the locking protrusion 41 retreats into the housing 6.

[0041] like Figure 4 , 7 -8, a preferred embodiment is shown, in which the unlocking member 3 is driven to drive the locking boss 41 to retreat into the housing 6 by the indicator member 22. The button 2 includes a button member 21 for operation and an indicator member 22 in the button member 21, the indicator member 22 includes a rotating shaft 221, a display end face 223 and a driving boss 222 arranged on the rotating shaft 221, the display end face 223 is provided with an indicating portion used as a switch opening and closing mark, the button member 21 is provided with a cavity-type mounting hole 211 inside, the operating end face of the button member 21 is provided with an observation window 212 that is intersected with the mounting hole 211, the indicator member 22 is installed in the mounting hole 211 of the button member 21 through the rotating shaft 221 and can swing around the axis, the swing drives the indicating portion on the display end face 223 to move under the observation window 212, and by moving to the indicating portion in the observation window 212 The driving boss 222 is exposed outside the button 21, and the unlocking member 3 is provided with a corresponding bent end 32, the bending direction of the bent end 32 is toward the driving boss 222 side of the indicator 22. When the circuit breaker is closed, the button 2 moves into the shell 6, and the driving boss 222 cooperates with the bent end 32 to rotate the indicator 22, so that the area of ​​the indicator corresponding to the closing state on the display end face 223 corresponds to the observation window 212; after the circuit breaker is opened, the button 2 is pulled away from the circuit breaker, and the driving boss 222 drives the unlocking member 3 to rotate through the bent end 32, and the unlocking portion 31 applies force to the locking member 4 to make the locking boss 41 retreat into the shell 6.

[0042] Specific as Figure 7-Figure 8 As shown, the driving boss 222 on the rotating shaft 221 of the indicator 22 is provided with a left actuated end 222b and a right actuated end 222a bent toward the unlocking member 3, and the bent end 32 of the unlocking member 3 is bent toward the button 2 and is located between the left actuated end 222b and the right actuated end 222a. Figure 8 As shown, when the button 2 is operated to close the circuit breaker, the inclined surface of the left actuated end 222b of the indicator 22 contacts the bent end 32 of the unlocking member 3 and rotates counterclockwise due to the resistance of the bent end 32 of the unlocking member 3, so that the operator can see the area of ​​the indicator corresponding to the closed state in the observation window 212, and the opening and closing mark displayed on the indicator corresponds to the color mark representing the closed state. Figure 7As shown, when the button 2 is pulled away from the circuit breaker to perform the opening operation, when the circuit breaker is opened, the bent end 32 is located between the left actuated end 222b and the right actuated end 222a, and the inner inclined surface of the right actuated end 222a touches the right side of the bent end 32, generating a force to cause the indicator to rotate clockwise around the rotating axis, and the indicator in the button member 21 is driven by the bent end 32 of the unlocking member 3 to rotate to indicate the opening, and the area of ​​the indicator corresponding to the opening state can be seen in the observation window 212, and the opening and closing mark displayed by the indicator corresponds to the color mark representing the opening at this time. After the circuit breaker is opened, when the circuit breaker needs to be removed from the installation cabinet, the right actuated end 222a of the indicator 22 acts on the lower end surface of the bent end 32 of the unlocking member 3, and the unlocking member 3 is forced to rotate clockwise around the axis to drive its extended end 31 to act on the linkage unlocking portion 43 of the locking member 4, so that the locking boss 41 of the locking boss 41 is retracted into the circuit breaker, and the circuit breaker can be safely removed from the working position of the cabinet.

[0043] like Figure 5 As shown, a preferred embodiment of the locking member 4 and the unlocking member 3. The locking member 4 and the unlocking member 3 are arranged between the button mechanism and the limiting hole 61, the locking member 4 is arranged corresponding to the driving member 5, and the unlocking member 3 is arranged corresponding to the button 2. The locking member 4 is provided with a locking boss 41 at the upper part close to the limiting hole 61, and a convex limiting end 42 extending downward is provided at the lower part close to the button mechanism. A linkage unlocking portion 43 is provided at one side of the locking boss 41 close to the unlocking member 3, and the linkage unlocking portion 43 is a step located at one side of the locking boss 41. The locking member 4 is slidably installed in the locking member groove on the housing 6, one end of the elastic member 44 acts on the lower part of the locking member 4, and the other end acts on the housing 6. The lower part of the locking member 4 is provided with a spring connection portion, and the elastic member 44 enables the locking member 4 to be installed on the housing 6 through a linear motion pair. The movement of the locking member 4 is a non-rotational translational movement, and the direction of its linear movement is perpendicular to the installation and insertion direction of the circuit breaker. The unlocking member 3 is rotatably arranged in the shell 6, and an unlocking portion 31 cooperating with the locking member 4 is provided on the unlocking member 3 pointing in the direction of the locking member 4. A bending end 32 is provided on the other end of the unlocking member 3, and an unlocking member rotating shaft 33 is provided on one side of the bending end 32. The bending end 32 is a raised square platform structure and corresponds to the position of the unlocking member rotating shaft 33.

[0044] like Figure 6As shown, another embodiment of the locking member 4 and the unlocking member 3. The locking member 4 is provided with a locking boss 41 at the upper part close to the limiting hole 61, and a convex limiting end 42 extending downward is provided at the lower part close to the button mechanism. A linkage unlocking portion 43 is provided at one side of the locking boss 41 close to the unlocking member 3. The linkage unlocking portion 43 is a groove located at one side of the locking boss 41, and the unlocking portion of the unlocking member 3 is inserted into the groove of the linkage unlocking portion 43. The unlocking member 3 is rotatably arranged in the housing 6, and an unlocking portion 31 cooperating with the locking member 4 is provided on the unlocking member 3 pointing in the direction of the locking member 4, an unlocking member rotating shaft is provided in the middle of the unlocking member 3, and a bent end 32 is provided at the other end of the unlocking member 3.

[0045] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A plug-in circuit breaker, comprising a housing (6), a button mechanism and an operating mechanism (9), wherein the button mechanism drives the operating mechanism (9) to close / open the circuit breaker, the button mechanism having a closing position and an opening position corresponding to the closing / opening state of the circuit breaker, and a limit hole (61) is provided on the housing (6), characterized in that: The circuit breaker further comprises a locking member (4) arranged in the housing (6), the locking member (4) being provided with a locking boss (41) arranged corresponding to the limiting hole (61), and when the button mechanism is located at the closing position, the locking boss (41) of the locking member (4) extends out of the limiting hole (61) and is restricted by the button mechanism so as not to be retracted into the housing (6); When the button mechanism is in the opening position, the locking boss (41) of the locking member (4) extends out of the limiting hole (61), exerting a retracting external force on the locking member (4), so that the locking boss (41) of the locking member (4) can be retracted into the housing (6), and the locking member (4) restricts the button mechanism from performing a closing operation so that the circuit breaker cannot complete the closing action.

2. The plug-in circuit breaker according to claim 1, characterized in that: The locking member (4) is installed in a housing (6) for linear movement, and the direction of its linear movement is perpendicular to the installation and insertion direction of the circuit breaker. An elastic member (44) is connected between the locking member (4) and the housing (6). The elastic force of the elastic member (44) drives the locking boss (41) of the locking member (4) to extend out of the housing (6). When the button mechanism is in the opening position, a retracting external force is applied to the locking member (4), and the locking member (4) overcomes the elastic force of the elastic member (44) to cause the locking boss (41) to retract into the housing (6).

3. The plug-in circuit breaker according to claim 1 or 2, characterized in that: The button mechanism comprises a button (2), a connecting rod (7) and a driving member (5); the button (2) drives the driving member (5) to move via the connecting rod (7); the driving member (5) is rotatably arranged in a housing (6) and connected to an operating mechanism (9).

4. The plug-in circuit breaker according to claim 3, characterized in that: The locking member (4) is provided with a limit end (42), and the driving member (5) is provided with a limit surface (52). When the button mechanism is in the closing position, the limit surface (52) and the limit end (42) are relatively blocked and matched, so that the locking boss (41) of the locking member (4) cannot be retracted into the housing (6); when the button mechanism is in the opening position, the limit surface (52) and the limit end (42) are offset to avoid releasing the blocking cooperation, and when a retracting external force is applied to the locking member (4), the locking boss (41) of the locking member (4) is retracted into the housing (6).

5. The plug-in circuit breaker according to claim 3, characterized in that: The locking member (4) is provided with a limiting end (42), and the driving member (5) is provided with a driving limiting portion (51). When the button mechanism is in the opening position, the driving limiting portion (51) is opposite to the limiting end (42). When the locking boss (41) of the locking member (4) is retracted into the housing (6), the limiting end (42) and the driving limiting portion (51) are limitedly matched to prevent the driving member (5) from rotating in the closing direction, thereby preventing the button mechanism from switching from the opening position to the closing position.

6. The plug-in circuit breaker according to claim 1, characterized in that: The invention also comprises an unlocking member (3), wherein the unlocking member (3) is provided with an unlocking portion (31) cooperating with the locking member (4). After the circuit breaker is opened, the button (2) is continuously pulled, and the button mechanism drives the unlocking member (3) to move, and the unlocking portion (31) of the unlocking member (3) applies a retracting force to the locking member (4) so ​​that the locking boss (41) is retracted into the housing (6).

7. The plug-in circuit breaker according to claim 3, characterized in that: The button (2) is provided with an unlocking arm cooperating with the locking member (4). After the circuit breaker is opened, the button (2) is continuously pulled, and the unlocking arm applies a retracting force to the locking member (4) so ​​that the locking boss (41) is retracted into the housing (6).

8. The plug-in circuit breaker according to claim 2, characterized in that: The locking member (4) is provided with a locking boss (41) at the upper part close to the limiting hole (61), and a limiting end (42) extending downward is provided at the lower part close to the button mechanism, and a linkage unlocking portion (43) is provided at one side of the locking boss (41).

9. The plug-in circuit breaker according to claim 6, characterized in that: The unlocking member (3) is rotatably arranged in the housing (6); the unlocking member (3) is provided with an unlocking portion (31) that cooperates with the locking member (4) and points in the direction of the locking member (4); the other end of the unlocking member (3) is provided with a bent end (32); the button mechanism drives the unlocking member (3) to rotate through the bent end (32) so that the unlocking portion (31) applies force to the locking member (4) so ​​that the locking boss (41) retracts into the housing (6).

10. The plug-in circuit breaker according to claim 9, characterized in that: The button (2) comprises a button member (21) for operation and an indicator member (22) in the button member (21); the indicator member (22) comprises a rotating shaft (221), a display end surface (223) and a driving boss (222) arranged on the rotating shaft (221); the display end surface (223) is provided with an indicator portion used as a switch opening and closing mark; a cavity-type mounting hole (211) is provided inside the button member (21); an observation window (212) intersecting the mounting hole (211) is provided on the operating end surface of the button member (21); the indicator member (22) is installed in the mounting hole (211) of the button member (21) via the rotating shaft (221) and can swing around the shaft; the swing drives the indicator portion on the display end surface (223) to move under the observation window (212); and the indicator portion moves into the observation window (212). The corresponding opening and closing state is displayed; the driving boss (222) is exposed outside the button member (21); the unlocking member (3) is provided with a corresponding bent end (32); the bending direction of the bent end (32) is toward the driving boss (222) side of the indicating member (22); when the circuit breaker is closed, the button (2) moves into the housing (6); the driving boss (222) cooperates with the bent end (32) to rotate the indicating member (22), so that the area of ​​the indicating portion corresponding to the closing state on the display end surface (223) corresponds to the observation window (212); after the circuit breaker is opened, the button (2) is pulled in a direction away from the circuit breaker, the driving boss (222) drives the unlocking member (3) to rotate through the bent end (32), and the unlocking member (31) applies force to the locking member (4) to retract the locking boss (41) into the housing (6).

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