Plug-in circuit breaker

Abstract

A circuit breaker includes a housing, a button mechanism, and an operating mechanism. The button mechanism drives the operating mechanism 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. A limiting hole is provided on the housing. The circuit breaker further includes a locking member disposed inside the housing. The locking member is provided with a locking boss corresponding to the limiting hole. When the button mechanism is in the closing position, the locking boss of the locking member extends outside the housing. When a retracting pressure is applied to the locking member to retract the locking boss into the housing, the locking member drives the button mechanism to drive the operating mechanism to open. When the closed circuit breaker is inserted into the cabinet, the circuit breaker is forced to open automatically, avoiding live operation and improving safety.

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 applications, the requirements for circuit breakers to effectively improve the safety of electrical equipment are becoming increasingly higher. The traditional power supply method of connecting multiple sockets and power strips to one terminal circuit breaker is far from meeting the requirements of safe power use and equipment protection. For example, the terminal circuit breakers used in 5G communication equipment are in urgent need of upgrading and improving in terms of miniaturization, intelligence, reliability, stability and other performance. In addition, many new matching structures have been developed to meet the usage requirements. For example, the circuit breaker is required to be easy to plug and unplug like a plug and be able to 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 the various safety protection features of the circuit breaker for power lines and electrical equipment, but also meet the power quality needs of different electrical equipment. In addition, the circuit breaker can be conveniently installed and removed from the circuit in a plug-in manner.

[0003] Existing plug-in circuit breakers are usually equipped with a locking device. The locking protrusion of the locking device 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, since the sheet metal structure of the circuit breaker mounting cabinet has a certain degree of elasticity, if the insertion or removal force is large, it may still cause the circuit breaker to be inserted or removed from the mounting cabinet in the closed state, posing a risk of live operation. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] A plug-in circuit breaker includes a housing, a button mechanism, and an operating mechanism. The button mechanism drives the operating mechanism to close / open the circuit breaker. The button mechanism has a closing position and an opening position corresponding to the closing / opening state of the circuit breaker. The housing is provided with a limit hole. The circuit breaker also includes a locking member disposed within the housing. The locking member is provided with a locking boss corresponding to the limit hole. When the button mechanism is in the closing position, the locking boss of the locking member extends out of the housing. When retraction pressure is applied to the locking member to retract the locking boss into the housing, the locking member drives the button mechanism to drive the operating mechanism to open the circuit breaker.

[0007] Preferably, when the button mechanism is in the opening position, when the locking boss of the locking member is retracted into the housing, the locking member cooperates with the button mechanism to prevent the button mechanism from switching from the opening position to the closing position.

[0008] Preferably, the locking member is installed in the housing through a linear motion pair, and the direction of its linear motion is perpendicular to the installation and insertion direction of the circuit breaker.

[0009] Preferably, when the button mechanism is in the opening position, the locking boss of the locking member extends out of the housing, and the locking boss of the locking member can be pushed back into the housing by an external retracting force.

[0010] Preferably, the locking member includes a locking boss that cooperates with the limiting hole and an extension column that cooperates with the button mechanism. The locking boss is provided at the upper part of the locking member near the limiting hole, and the extension column is provided at the lower part of the locking member near the button mechanism.

[0011] Preferably, a locking member driving part is provided on the button mechanism. When the button mechanism is in its closing position, the extension column of the locking member corresponds to the locking member driving part; when the locking boss of the locking member is squeezed and retracted into the circuit breaker, the extension column of the locking member contacts and pushes the locking member driving part of the button mechanism to make the button mechanism act in the opening direction, so that the closed circuit breaker automatically opens.

[0012] Preferably, a locking member driving part is provided on the button mechanism. When the button mechanism is in the opening position, when the locking boss of the locking member is squeezed and retracted into the circuit breaker, the extension column of the locking member moves to the closing direction of the locking member driving part and faces the locking member driving part, restricting the button mechanism from acting in the closing direction and preventing the circuit breaker from completing the closing action.

[0013] Preferably, the button mechanism includes a button and a driving member. The button is drivingly connected to the driving member through a connecting rod. The driving member is rotatably arranged in the housing and is drivingly connected to the operating mechanism. A locking member driving part is provided on the driving member. When the button mechanism is in the closing position, the extension column of the locking member corresponds to the locking member driving part. When the locking boss of the locking member is squeezed and retracted into the circuit breaker, the extension column of the locking member contacts and pushes the locking member driving part of the button mechanism to make the button mechanism act in the opening direction, so that the closed circuit breaker automatically opens.

[0014] Preferably, the button mechanism includes a button and a driving member. The button is drivingly connected to the driving member through a connecting rod. The driving member is rotatably arranged in the housing and is drivingly connected to the operating mechanism; a locking member driving part is provided on the driving member. When the button mechanism is in the opening position, when the locking boss of the locking member is squeezed and retracted into the circuit breaker, the extension column of the locking member moves to the closing direction of the locking member driving part and faces the locking member driving part, restricting the button mechanism from acting in the closing direction and preventing the circuit breaker from completing the closing action.

[0015] Preferably, a spring is provided between the locking member and the housing, and its elastic force drives the locking boss of the locking member to extend out of the housing.

[0016] Preferably, an unlocking member is further included, and when the button mechanism is in the opening position, the unlocking member is used to drive the locking boss of the locking member to retract into the interior of the housing.

[0017] Preferably, when the button mechanism is in the opening position, the button mechanism is pulled outward in a direction away from the circuit breaker, and the button mechanism drives the unlocking member, so that the unlocking member drives the locking boss of the locking member to retract into the interior of the housing.

[0018] Preferably, the unlocking member is rotatably arranged in the shell, and the unlocking member is provided with a linkage end pointing in the direction of the locking member and cooperating with the linkage unlocking part on the locking member. The other end of the unlocking member is a bent end, and the button mechanism drives the unlocking member through the bent end to drive the locking boss of the locking member to retract into the shell.

[0019] Preferably, the button mechanism includes a button, a connecting rod and a driving member, the button is connected to the driving member through the connecting rod, the driving member is connected to the operating mechanism, the button includes a button member for operation and an indicator member in the button member, the indicator member includes a rotating shaft, a display end face and a driving boss arranged on the rotating shaft, an indicator portion used as an opening and closing mark is provided on the display end face, a cavity-type mounting hole is provided inside the button member, an observation window that is connected to the mounting hole is provided on the operating end face of the button member, the indicator member is installed in the mounting hole of the button member through the rotating shaft and can swing around the axis, and the swing drives the indicator portion on the display end face to move in the observation The window is moved down, and the corresponding opening and closing status is displayed by moving the indicator part in the observation window; the driving boss is exposed outside the button, and the unlocking part is provided with a corresponding bent end, and the bending direction of the bent end is toward the driving protrusion side of the indicator part. 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 part so that the area of the indicator part corresponding to the closing state on the display end surface corresponds to the observation window; after the circuit breaker is opened, the button is pulled in the direction away from the circuit breaker, and the driving boss drives the linkage part to rotate through the bent end, and the extended end applies force to the locking part to retract the locking boss into the shell.

[0020] Preferably, a left actuated end b and a right actuated end a are provided on the driving boss on the rotating shaft of the indicator, and the bent end of the linkage member is bent toward the button and located between the left actuated end b and the right actuated end a. After the circuit breaker is opened, the button is pulled away from the circuit breaker, and the right actuated end a of the indicator is driven to cooperate with the bent end of the unlocking member. When the circuit breaker is closed, the actuated end b of the indicator cooperates with the bent end of the unlocking member.

[0021] Preferably, the locking piece is provided with a locking boss at the upper part near the limiting hole, an outrigger column is provided at the lower part near the button mechanism, and a linkage unlocking part is provided on one side of the locking boss, which is a groove arranged on the side of the locking piece near the unlocking piece.

[0022] For the plug-in circuit breaker of the present invention, when the circuit breaker is closed before installation and the button mechanism is in the closed position, and then the circuit breaker is inserted into the cabinet. During the installation process, the sheet metal part of the cabinet squeezes the locking part to apply a retracting pressure, causing the locking boss of the locking part to retract into the shell. At the same time, the locking part drives the button mechanism to drive the operating mechanism to trip, avoiding live operation and improving safety. Conventional plug-in circuit breakers usually use a locking device to prevent the circuit breaker from being pulled out or inserted in the closed state by means of limiting. The present invention innovatively drives and cooperates the locking part with the button mechanism. When the circuit breaker is inserted in the closed state, the locking part drives the button mechanism to trip, adopting a completely different technical solution.

[0023] The locking part of the present invention can also lock the button mechanism of the circuit breaker. When the circuit breaker is not correctly installed at the working position of the cabinet, the button mechanism cannot complete the closing action. Only when the circuit breaker is installed at the correct working position, the button mechanism can be normally opened and closed. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the tripped state of the plug-in circuit breaker of the present invention.

[0025] Figure 2 It is a process diagram of the circuit breaker of the present invention being inserted into the cabinet when it is tripped, and it has not been installed at the working position of the cabinet at this time.

[0026] Figure 3 It is of the present invention Figure 2 Partial enlarged schematic diagram of the state.

[0027] Figure 4 It is a partial enlarged schematic diagram of the plug-in circuit breaker of the present invention being closed before installation and about to be installed in the cabinet.

[0028] Figure 5 It is Figure 4 Process diagram of the circuit breaker being inserted into the cabinet, and it has not been installed at the working position of the cabinet at this time. The locking part moves downward to push the driving part to rotate in the tripping direction.

[0029] Figure 6 It is Figure 5 Partial enlarged schematic diagram of the automatic tripping action state of the circuit breaker after the locking part 4 in it triggers the driving part to turn past the dead point.

[0030] Figure 7 It is a schematic diagram of the relevant structures of the indicating part, unlocking part and locking part of the button mechanism in the tripped state. At the same time, the indicating part in the button part is driven by the bent end of the unlocking part to rotate to display tripping.

[0031] Figure 8 It is a partial enlarged schematic diagram of the cooperation between the indicating part and the unlocking part in the tripped state.

[0032] Figure 9 It is in the closing state, and it is a partially enlarged schematic diagram of the cooperation between the indicating member and the unlocking member.

[0033] Figure 10 It is in the opening state. Continuing to pull the button mechanism, the unlocking member causes the locking member to retract into the housing, allowing the overall structural schematic diagram when the circuit breaker is removed from the cabinet. Specific embodiments

[0034] The following combines the Figures 1 to 10 given embodiments to further illustrate the specific embodiments 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.

[0035] As Figure 1 shown, the plug-in circuit breaker of the present invention includes a housing 6, a button mechanism, an operating mechanism 9 drivingly connected to the button mechanism, a moving contact connected to the operating mechanism 9, a static contact disposed opposite to the moving contact, and generally also includes (but is not limited to) a short-circuit protection mechanism 11, an arc extinguishing device 12, an overload protection mechanism 14, an outgoing line connection device 13, an incoming line connection device 15, and other components (not shown in the figure) possessed by the circuit breaker. The button mechanism drives the operating mechanism 9 to drive the moving contact to contact and close with the static contact, or drives the operating mechanism 9 to drive the moving contact to separate and open from the static contact. The button mechanism has a closing position and an opening position corresponding to the closing / opening state of the circuit breaker.

[0036] A locking device is further provided inside the plug-in circuit breaker. A limiting hole 61 cooperating with the locking device is provided on the housing 6. A cabinet limiting hole B0 is provided on the cabinet sheet metal part B of the receptor into which the plug-in circuit breaker is inserted (see Figure 2 ). When the plug-in circuit breaker is installed in the working position, the limiting hole 61 of the plug-in circuit breaker corresponds to the cabinet limiting hole B0. When the plug-in circuit breaker is not installed in the working position, the limiting hole 61 of the plug-in circuit breaker is misaligned with the cabinet limiting hole B0, and the cabinet sheet metal part B will block the cabinet limiting hole B0. This is the prior art in this field and will not be elaborated here.

[0037] As Figure 1As shown, an embodiment of the plug-in circuit breaker of the present invention includes a housing 6 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 includes a button 2, a connecting rod 7 and a driving member 5. The button 2 triggers the driving member 5 to operate 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 9a to contact with the static contact 9b to achieve closing. When the button 2 is pulled, 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 9a to separate from the static contact to achieve 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 trip lock connected to the moving contact 9a. The short-circuit protection mechanism 11 and the overload protection mechanism 14 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.

[0038] 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 member 4 arranged in the housing 6, and the locking member 4 is provided with a locking boss 41 corresponding to the limiting hole 61. The locking boss 41 can extend from or retract into the limiting hole 61 according to the installation state of the circuit breaker, thereby realizing the two working positions of extension and retraction of the locking member 4 respectively. When the button mechanism is in the closed position, the locking boss 41 of the locking member 4 extends out of the housing 6. When retraction pressure is applied to the locking member 4 to retract the locking boss 41 into the housing 6, the locking member 4 drives the button mechanism to drive the operating mechanism 9 to open the circuit.

[0039] like Figures 4 - 6 As shown, when the circuit breaker is closed before installation and the button mechanism is in the closed position, the circuit breaker is then inserted into the cabinet. During installation, the cabinet sheet metal B squeezes the locking member 4, exerting retraction pressure, causing the locking boss 41 of the locking member 4 to retract into the housing. Simultaneously, the locking member 4 drives the button mechanism to open the operating mechanism 9, preventing live operation and improving safety. Existing plug-in circuit breakers typically use a locking device to prevent the circuit breaker from being removed or inserted in the closed state through a limited position. The present invention innovatively utilizes a completely different technical solution by cooperating with the driving force of the locking member 4 and the button mechanism. When the circuit breaker is inserted in the closed state, the locking member 4 drives the button mechanism to open the circuit breaker.

[0040] Further, if Figures 2 - 3As shown, when the button mechanism is in the open position, when the locking boss 41 of the locking member 4 retracts into the housing 6, the locking member 4 abuts and cooperates with the button mechanism. The locking member 4 restricts the button mechanism from driving the operating mechanism 9 to close in the closing direction, preventing the button mechanism from switching from the open position to the closing position, so that the plug-in circuit breaker cannot be closed during the process of being installed in the working position in the cabinet, and the button 2 cannot be pressed in place, avoiding live operation. One solution for the locking member 4 is that as long as the button mechanism is in the open position, the locking boss 41 of the locking member 4 retracts into the housing 6, so that the circuit breaker can be normally plugged and unplugged from the cabinet. As another preferred solution for the locking member 4, when the button mechanism is in the open position, the locking boss 41 of the locking member 4 extends out of the housing 6, and the locking boss 41 of the locking member 4 can be pushed by an external retracting force to retract into the housing 6 (only horizontal force will not cause the locking member 4 to retract, and a vertical component force in the retracting direction is required), that is, it does not prevent the circuit breaker from being inserted into the cabinet in the open state, and can also protect the circuit breaker from falling out of the cabinet due to vibration during transportation and other processes.

[0041] As Figure 1 In the preferred embodiment shown, the locking member 4 includes a locking boss 41 that cooperates with the limiting hole 61 and an outer extension column 42 that cooperates with the button mechanism. The locking boss 41 is provided at the upper part of the locking member 4 close to the limiting hole 61, and the outer extension column 42 is provided at the lower part close to the button mechanism. A locking member driving part 51 is provided on the button mechanism. When the button mechanism is in its closing position, the outer extension column 42 of the locking member 4 corresponds to the locking member driving part 51; when the already-closed circuit breaker is inserted into the cabinet, when the locking boss 41 of the locking member 4 is compressed and retracted into the circuit breaker by the extrusion force when being inserted into the cabinet, the downward movement of the locking member 4 causes the outer extension column 42 of the locking member 4 to press against the locking member driving part of the button mechanism 51, contacting and pushing the locking member driving part 51 of the button mechanism to make the button mechanism act in the opening direction, so that the already-closed circuit breaker automatically opens. When the button mechanism is in the open position and the circuit breaker is inserted into the cabinet, when the circuit breaker is not installed in the working position of the cabinet, the locking boss 41 of the locking member 4 is compressed and retracted into the circuit breaker, and the outer extension column 42 of the locking member 4 moves to the closing direction of the locking member driving part 51 and is opposite to the locking member driving part 51 of the button mechanism. The outer extension column 42 abuts against the locking member driving part 51 in the closing direction of the button mechanism, restricting the button mechanism from acting in the closing direction and preventing the circuit breaker from completing the closing operation.

[0042] Preferably, the button mechanism includes a button 2 and a driving member 5. The button 2 is drivingly connected to the driving member 5 through a connecting rod 7. The driving member 5 is rotatably arranged in a housing 6 and is drivingly connected to an operating mechanism 9. The locking member driving portion 51 is arranged on the driving member 5. Preferably, the locking member driving portion 51 is a slope arranged on the outer side wall of the driving member 5. When the button mechanism is in the closing position, the extension column 42 of the locking member 4 corresponds to the locking member driving portion 51. When the locking boss 41 of the locking member 4 is squeezed and retracted into the circuit breaker, the extension column 42 of the locking member 4 contacts and pushes the locking member driving portion 51 of the button mechanism to make the button mechanism act in the opening direction, so that the closed circuit breaker automatically opens. When the button mechanism is in the opening position, when the locking boss 41 of the locking member 4 is squeezed and retracted into the circuit breaker, the extension column 42 of the locking member 4 moves to the closing direction of the locking member driving portion 51 and faces the locking member driving portion 51, restricting the button mechanism from acting in the closing direction and preventing the circuit breaker from completing the closing action.

[0043] Specifically, as Figures 4 - 5 shown, when the circuit breaker is closed before installation, the button mechanism and the driving member 5 are both in their closing positions. When it is installed in the cabinet, the locking boss 41 of the locking member 4 is squeezed by the cabinet and enters the circuit breaker. The extension column 42 of the locking member 4 is driven to move into the circuit breaker. It contacts and pushes the locking member driving portion 51 on the driving member 5 in the closing position to rotate in a direction opposite to the closing rotation direction. Figure 6 is Figure 4 、 5 a partially enlarged schematic view of the structural state where the operating mechanism can achieve the opening action after the driving member 5 in Figure 6 turns past the dead point. As Figure 6 shown, the driving member 5 continues to rotate in the opening direction under the action of a spring force (the spring of the driving member, not shown in the figure) until the U-shaped rod 8 disengages from the dead point position of the operating mechanism. Only when the extension column 42 of the locking member 4 disengages from the locking member driving portion 51 of the driving member 5 and the driving member 5 of the circuit breaker continues to be pushed by the spring force and rotates until the U-shaped rod 8 disengages from the dead point position of the operating mechanism, the driving member 5 completely disengages from the closing position, and the operating mechanism 9 can achieve the opening action to ensure that the circuit breaker is inserted in the open state. In other words, only when the circuit breaker is inserted into its correct installation position and is in the open state, is the button mechanism allowed to complete the closing action.

[0044] As Figures 2 - 3 shown, when the circuit breaker is not installed in the working position, the locking boss 41 changes from the protruding state to as Figure 3As shown, it is pressed into the circuit breaker by the cabinet. If the button 2 of the circuit breaker is pressed at this time, when the locking part driving portion 51 on the driving member 5 rotates to be pressed by the protruding column 42 on the locking member 4 to achieve a contact in resistance, the driving member 5 is resisted by the protruding column 42 and cannot continue to rotate to the closing position of the operating mechanism 9. Because at this time, the rotation angle of the driving member 5 is less than the rotation angle required for the operating mechanism 9 to reach the closing position, resulting in the button mechanism being unable to complete the closing stroke and the circuit breaker being unable to complete the closing action. Even if the driving member 5 has deviated in the closing direction at this time, the protruding column 42 on the locking member 4 contacts the locking part driving portion 51 on the driving member 5 to form a contact in resistance and push the driving member 5 to only rotate in the opening direction, thus restricting the driving member 5 from continuing to rotate to the closing position of the operating mechanism 9.

[0045] In this embodiment, the locking member 4 cooperates with the driving member 5, and the locking part driving portion 51 is arranged on the driving member 5. When the circuit breaker is installed for closing, the locking member 4 can trigger the rotation of the driving member 5 to switch the circuit breaker from the closing state to the opening state, and can limit the rotation of the driving member 5 during the installation process to prevent the circuit breaker from switching from the opening state to the closing state. Of course, the locking part driving portion 51 can also be arranged on the button 2 or the connecting rod 7, and the locking member 4 can also cooperate with the button 2 or the connecting rod 7. The locking part driving portion 51 is a boss or a groove on the button 2, or a hook extending on the connecting rod 7. For example, when the button mechanism is in the closing position, when the locking boss 41 of the locking member 4 is squeezed and retracted into the circuit breaker, the protruding column 42 rotates to drive the boss or groove on the button 2, causing the button 2 to move in the opening direction and making the already closed circuit breaker automatically open; when the button mechanism is in the opening position, when the locking boss 41 of the locking member 4 is squeezed and retracted into the circuit breaker, it is in a limit fit with the boss or groove on the button 2 to prevent the button mechanism from acting in the closing direction and making the circuit breaker unable to complete the closing action.

[0046] It can be seen that a feature of the present invention is that when the circuit breaker is not installed in the working position or the circuit breaker is in the closing state, due to the mutual pressing of the protruding column 42 on the locking member 4 and the locking part driving portion 51 of the driving member 5, a resistance limit to the driving member 5 is formed. In this way, although the circuit breaker can perform the insertion action, it can be ensured that the button mechanism cannot be pressed to complete the closing action during the insertion process or the already closed circuit breaker automatically opens. Only when the driving member 5 rotates past the dead point, the driving member 5 of the operating mechanism is unlocked, thereby avoiding the live insertion of the circuit breaker in the closing state.

[0047] Such as Figure 1 、 10As shown, a locking boss 41 is provided on the upper part of the locking member 4 close to the limiting hole 61, and an extension column 42 is provided on the lower part close to the button mechanism. Preferably, the locking member 4 is installed in the housing 6 through a linear motion pair, and the direction of its linear motion is perpendicular to the installation and insertion direction of the circuit breaker. Since the locking member 4 moves linearly along the direction perpendicular to the installation and insertion direction A, it can effectively prevent or reduce the force deformation and / or micro-displacement of the locking member 4 and the cabinet sheet metal part of the insertion receptor. A locking member groove for installing the locking member 4 is provided on the housing 6, and the locking member 4 is in sliding fit with the locking member groove. The locking member 4 is arranged between the button mechanism and the limiting hole 61. An elastic member is provided between the locking member 4 and the housing 6. The elastic member is a spring 10, and its elastic force drives the locking boss 41 of the locking member 4 to extend out of the housing 6. As Figure 7 shown, the spring 10 acts on the lower side surface of the locking member 4. When the circuit breaker is in the working position of the cabinet, the locking boss 41 extends out of the housing 6, and the locking boss 41 abuts against the side wall of the cabinet limiting hole B0 in the direction of the circuit breaker being removed from the cabinet to prevent the circuit breaker from being removed. Preferably, the cross-section of the locking boss 41 of the locking member 4 is a right trapezoid or a right triangle. The locking boss 41 includes a straight surface perpendicular to the side wall of the limiting hole 61 and an inclined surface. The straight 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, effectively preventing the circuit breaker from being removed and not hindering the insertion of the circuit breaker in the open state.

[0048] Further preferably, the circuit breaker further includes an unlocking member 3. When the button mechanism is in the closing position, the locking member 4 corresponds to the locking member driving part 51 of the button mechanism and is in mutual contact and cooperation. When the button mechanism is in the opening position, the locking member 4 is disengaged from the mutual contact with the button mechanism. The unlocking member 3 is used to drive the locking boss 41 of the locking member 4 to retract into the interior of the housing, so that the circuit breaker can be pulled out of the cabinet when the circuit breaker is in the working position of the cabinet. A preferred solution is that the button mechanism drives the unlocking member 3 to retract the locking boss 41 of the locking member 4 into the interior of the housing. When the button mechanism is in the opening position, the button mechanism is pulled outward in the direction away from the circuit breaker, and the button mechanism drives the unlocking member 3, so that the unlocking member 3 drives the locking boss 41 of the locking member 4 to retract into the interior of the housing.

[0049] As Figure 1 、 10As shown, the unlocking member 3 is rotatably arranged in the housing 6, and the unlocking member 3 is directed towards the locking member 4 and is provided with a linkage end 31 that cooperates with the linkage unlocking portion 43 on the locking member 4. The linkage unlocking portion 43 is a groove arranged on the side of the locking member 4 close to the unlocking member 3, and the linkage end 31 is inserted into the groove of the linkage unlocking portion 43. The linkage end 31 is arranged in the linkage unlocking portion 43 on the locking member 4 and can overlap with the linkage unlocking portion 43; the other end of the unlocking member 3 is a bent end 32, and the button mechanism drives the unlocking member 3 to retract the locking member 4 through the bent end 32.

[0050] Specifically, the button mechanism includes a button 2 and a driving member 5. In this embodiment, the button 2 is used to drive the bent end 32 of the unlocking member 3. The button 2 is arranged below the unlocking member 3, and the driving member 5 is arranged below the locking member 4. The locking member 4 is located on the right side of the unlocking member 3. The unlocking member 3 is provided with an extended linkage end 31 pointing in the direction of the locking member 4, and the linkage end 31 is arranged in the groove of the linkage unlocking portion 43 on the locking member. The locking member 4 is provided with a locking boss 41 at its upper portion near the limiting hole 61, and an outrigger 42 at its lower portion near the button mechanism. A linkage unlocking portion 43 is provided on one side of the locking boss 41. The linkage unlocking portion 43 is provided with a groove that mates with the linkage end 31 of the unlocking member 3. Alternatively, a notched step may be employed instead of a groove. The groove allows the top surface of the groove to rotate the unlocking member 3 when the locking member 4 is retracted by cabinet pressure, causing the bent end 32 to tilt clockwise, making way for the button's boss 222, allowing the button 2 to move outward. After the circuit breaker is opened, the button is pulled outward, causing the unlocking member 3 to rotate clockwise, and the linkage end 31 to press down on the bottom surface of the groove, retracting the locking member 4. When the button mechanism is in the open position, the button 2 is pulled outward away from the circuit breaker. The button 2 causes the unlocking member 3 to rotate clockwise via the bent end 32, and the linkage end 31, via the linkage unlocking portion 43, drives the locking member 4 to retract into the housing, overcoming the elastic force of the elastic member.

[0051] As another embodiment of the present invention, the locking member 4 and the unlocking member 3 can be an integrated structure, which is rotatably installed in the shell 6. One end of the unlocking member 3 is provided with a bent end 32 that cooperates with the button mechanism. The locking member 4 is provided with a locking boss 41 and an outrigger column 42. When the integrated structure is driven to rotate by an elastic member, the locking boss 41 extends out of the limiting hole 61. The elastic member can be a compression spring, a torsion spring, or a leaf spring.

[0052] One solution is to provide a driving protrusion or groove on the button 2 that cooperates with the bent end 32 to pull the bent end 32 of the unlocking member 3. As a preferred embodiment, the button 2 of the button mechanism includes a button member 21 and an indicator member 22. The indicator member 22 cooperates with the unlocking member 3 to simultaneously provide an opening and closing indication and drive the locking boss 41 of the locking member 4 to retract into the housing 6.

[0053] The described indicating member 22 includes a rotating shaft 221, a display end face 223, and a driving boss 222 provided on the rotating shaft 221. An indicating portion for making a closing and opening indication is provided on the display end face 223, and corresponding color patches or words for making a closing and opening indication are provided on the indicating portion. A cavity-type mounting hole 211 is provided inside the button member 21, and an observation window 212 communicating with the mounting hole 211 is provided on the operating end face of the button member 21. The indicating member 22 is installed in the mounting hole 211 of the button member 21 through the rotating shaft 22 and can swing around the shaft. This swing drives the indicating portion on the display end face 223 to move under the observation window 212, and the corresponding closing and opening states are displayed through the indicating portion moving into the observation window 212; the driving boss 222 is exposed outside the button 21, and a corresponding bent end 32 is provided on the unlocking member 3, and the bending direction of the bent end 32 faces the side of the driving boss 222 of the indicating member 22. When the circuit breaker is closed, the button 2 moves into the housing 6, and the driving boss 222 cooperates with the bent end 32 to rotate the indicating member 22, so that the area of the indicating portion on the display end face 223 corresponding to the closing state 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, and the driving boss 222 drives the linkage member 3 to rotate through the bent end 32, and the extending end 31 applies a force to the locking member 4 to retract the locking member 4 into the housing 6.

[0054] Specifically, as Figures 8 to 9 shown, a left receiving end 222b and a right receiving end 222a are respectively provided on the driving boss 222 on the rotating shaft 221 of the indicating member 22, and the bent end 32 of the linkage member 3 is bent toward the button 2 and is located between the left receiving end 222b and the right receiving end 222a. As Figure 9 shown, when the button 2 makes a closing operation toward the inside of the circuit breaker, the inclined surface of the left receiving end 222b of the indicating member 22 contacts the bent end 32 of the unlocking member 3 and is subjected to the resistance of the bent end of the unlocking member 3, and rotates counterclockwise. Thus, the operator can see the area of the indicating portion corresponding to the closing state in the observation window 212, and the color mark representing closing corresponding to the closing and opening mark displayed by the indicating portion at this time. As Figure 8 shown, when the button 2 is pulled in a direction away from the circuit breaker to make an opening operation, when the circuit breaker is opened, the bent end 32 is located between the left receiving end 222b and the right receiving end 222a, and the inner inclined surface of the right receiving end 222a touches the right side of the bent end 32, generating a force to make the indicating member rotate clockwise around the rotating shaft. The indicating member in the button member 21 is driven by the bent end 32 of the unlocking member 3 to rotate and display the opening, and the area of the indicating portion corresponding to the opening state can be seen in the observation window 212, and the color mark representing opening corresponding to the closing and opening mark displayed by the indicating portion at this time. After the circuit breaker is opened, when it is necessary to remove the circuit breaker from the installation cabinet, as Figure 10As shown, when the circuit breaker is in the open state, continue to pull the button 2 in the direction away from the circuit breaker, so that the right receiving end 222a of the indicating member 22 acts on the lower end surface of the bending end 32 of the unlocking member 3. The unlocking member 3 is forced to rotate clockwise around the axis, driving its extending end 31 to act on the linkage unlocking portion 43 of the locking member 4, causing the locking boss 41 of the locking member 4 to retract into the circuit breaker, and the circuit breaker can be safely removed from the working position of the cabinet.

[0055] The plug-in circuit breaker of the present invention cleverly solves the above problems of the prior art. The locking member 4 is a double-locking device, and a simplified structure design that cannot achieve closing is used to replace the structure design that cannot be inserted due to the locking member protruding and not retracting. A protection device can not only achieve double protection functions simultaneously, but also has more reliable protection. The locking member 4 has two working positions of protruding and retracting, and mainly has the following locking protection functions:

[0056] First, when the circuit breaker is in the closed state before installation, the locking member 4 touches and forcibly pushes the button mechanism, so that the circuit breaker can automatically trip.

[0057] Second, when the circuit breaker is not correctly installed in the working position of the cabinet, when the locking boss 41 of the locking member 4 is retracted into the housing 6 by the extrusion force applied by the cabinet, the locking member 4 limits the button mechanism, forcing the circuit breaker to be unable to complete closing.

[0058] Third, when the circuit breaker is installed in the correct working position of the cabinet and is in the closed working state, the locking boss 41 of the locking member 4 protrudes out of the limiting hole 61, locking the circuit breaker in its working position to prevent it from being pulled out during closing.

[0059] Fourth, when the circuit breaker is in the open state, the locking boss 41 of the locking member 4 protrudes out of the limiting hole 61, preventing the circuit breaker from falling out of the cabinet due to vibration during transportation and other processes.

[0060] Fifth, when the circuit breaker is in the open state, pull the button mechanism, and drive the locking member 4 through the unlocking member 3 to make the locking boss 41 retract into the housing 6, allowing the circuit breaker to be easily plugged and unplugged.

[0061] Sixth, the unlocking member 3 cooperates with the indicating member 22 in the button 2 at the same time, making the indicating member play a role in indicating the open and closed states of the circuit breaker.

[0062] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to 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 limiting 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); when the button mechanism is in the closing position, the locking boss (41) of the locking member (4) extends out of the housing (6); when a retraction pressure is applied to the locking member (4) to retract the locking boss (41) into the housing (6), the locking member (4) drives the button mechanism to drive the operating mechanism (9) to open the circuit.

2. The plug-in circuit breaker according to claim 1, characterized in that: When the button mechanism is in the opening position and the locking boss (41) of the locking member (4) is squeezed back into the housing (6), the locking member (4) cooperates with the button mechanism to prevent the button mechanism from switching from the opening position to the closing position.

3. The plug-in circuit breaker according to claim 1, wherein: The locking member (4) is installed in the housing (6) in a linearly movable manner, and the direction of its linear movement is perpendicular to the installation and insertion direction of the circuit breaker.

4. The plug-in circuit breaker according to claim 1, wherein: When the button mechanism is in the off position, the locking boss (41) of the locking member (4) extends out of the housing (6), and the locking boss (41) of the locking member (4) can be retracted into the housing (6) by being pushed by an external retraction force.

5. The plug-in circuit breaker according to claim 1, wherein: The locking member (4) comprises a locking boss (41) cooperating with the limiting hole (61) and an outrigger (42) cooperating with the button mechanism. The locking member (4) is provided with a locking boss (41) at an upper portion close to the limiting hole (61) and an outrigger (42) at a lower portion close to the button mechanism.

6. The plug-in circuit breaker according to claim 5, characterized in that: The button mechanism is provided with a locking member driving portion (51). When the button mechanism is in its closed position, the outward extension column (42) of the locking member (4) corresponds to the locking member driving portion (51); when the locking boss (41) of the locking member (4) is squeezed and compressed back into the interior of the circuit breaker, the outward extension column (42) of the locking member (4) contacts and pushes the locking member driving portion (51) of the button mechanism, causing the button mechanism to move in the opening direction, thereby automatically opening the closed circuit breaker.

7. The plug-in circuit breaker according to claim 5, characterized in that: The button mechanism is provided with a locking member driving portion (51). When the button mechanism is in the opening position, when the locking boss (41) of the locking member (4) is squeezed and compressed back into the interior of the circuit breaker, the outrigger (42) of the locking member (4) moves in the closing direction to face the locking member driving portion (51), thereby limiting the button mechanism from moving in the closing direction and preventing the circuit breaker from completing the closing action.

8. The plug-in circuit breaker according to claim 5, characterized in that: The button mechanism comprises a button (2) and a driving member (5). The button (2) is connected to the driving member (5) by a connecting rod (7). The driving member (5) is rotatably arranged in a housing (6) and is connected to the operating mechanism (9). A locking member driving portion (51) is provided on the driving member (5). When the button mechanism is in a closed position, the outward extension column (42) of the locking member (4) corresponds to the locking member driving portion (51). When the locking boss (41) of the locking member (4) is squeezed back into the circuit breaker, the outward extension column (42) of the locking member (4) contacts and pushes the locking member driving portion (51) of the button mechanism, causing the button mechanism to move in an opening direction, thereby automatically opening the closed circuit breaker.

9. The plug-in circuit breaker according to claim 5, characterized in that: The button mechanism comprises a button (2) and a driving member (5), wherein the button (2) is connected to the driving member (5) by a connecting rod (7), and the driving member (5) is rotatably arranged in a housing (6) and is connected to the operating mechanism (9); a locking member driving portion (51) is provided on the driving member (5), and the button mechanism is located in an opening position. When the locking boss (41) of the locking member (4) is squeezed and compressed back into the interior of the circuit breaker, the extension column (42) of the locking member (4) moves in the closing direction of the locking member driving portion (51) and faces the locking member driving portion (51), thereby limiting the button mechanism from moving in the closing direction and preventing the circuit breaker from completing the closing action.

10. The plug-in circuit breaker according to claim 1, characterized in that A spring (10) is provided between the locking member (4) and the housing (6), and its elastic force drives the locking boss (41) of the locking member (4) to extend out of the housing (6).

11. The plug-in circuit breaker according to claim 1, wherein: The invention also comprises an unlocking member (3), which is used to drive the locking boss (41) of the locking member (4) to retract into the interior of the housing when the button mechanism is in the off-switch position.

12. The plug-in circuit breaker according to claim 11, characterized in that: When the button mechanism is in the off position, the button mechanism is pulled outward in a direction away from the circuit breaker, and the button mechanism drives the unlocking member (3), so that the unlocking member (3) drives the locking boss (41) of the locking member (4) to retract into the housing.

13. The plug-in circuit breaker according to claim 12, characterized in that: The unlocking member (3) is rotatably arranged in the housing (6); the unlocking member (3) is provided with a linkage end (31) pointing in the direction of the locking member (4) and cooperating with the linkage unlocking portion (43) on the locking member (4); the other end of the unlocking member (3) is a bent end (32); the button mechanism drives the unlocking member (3) through the bent end (32) to drive the locking boss (41) of the locking member (4) to retract into the housing.

14. The plug-in circuit breaker according to claim 13, wherein: The button mechanism comprises a button (2), a connecting rod (7) and a driving member (5); the button (2) is drivingly connected to the driving member (5) via the connecting rod (7); the driving member (5) is drivingly connected to the operating mechanism (9); the button (2) comprises an operating button member (21) and an indicator member (22) in the button member (21); the indicator member (22) comprises a rotating shaft (221), a display end face (223) and a driving boss (222) arranged on the rotating shaft (221); an indicator portion used as an opening and closing mark is provided on the display end face (223); a cavity-type mounting hole (211) is provided inside the button member (21); an observation window (212) interpenetrating with the mounting hole (211) is provided on the operating end face of the button member (21); the indicator member (22) is mounted 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 display end face (223) The indicating portion on the upper portion moves under the observation window (212), and the corresponding opening and closing state is displayed by the indicating portion moving into the observation window (212); the driving boss (222) is exposed outside the button (21); the unlocking member (3) is provided with a corresponding bent end (32), and 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 indicator (22), so that the area of the indicator 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, and the driving boss (222) drives the linkage member (3) to rotate through the bent end (32), and the extended end (31) applies force to the locking member (4) to retract the locking boss (41) into the housing.

15. The plug-in circuit breaker according to claim 14, characterized in that: A left actuated end (222b) and a right actuated end (222a) are provided on the driving boss (222) on the rotating shaft (221) of the indicator (22). The bent end (32) of the linkage member (3) is bent toward the button (2) and is located between the left actuated end (222b) and the right actuated end (222a). After the circuit breaker is opened, the button (2) is pulled away from the circuit breaker, and the right actuated end (222a) of the indicator (22) is driven to cooperate with the bent end (32) of the unlocking member (3). When the circuit breaker is closed, the actuated end (222b) of the indicator (22) is engaged with the bent end (32) of the unlocking member (3).

16. The plug-in circuit breaker according to claim 13, wherein: The locking member (4) is provided with a locking boss (41) at the upper portion close to the limiting hole (61), and an outrigger (42) is provided at the lower portion close to the button mechanism. A linkage unlocking portion (43) is provided on one side of the locking boss (41), and the linkage unlocking portion (43) is a groove provided on the side of the locking member (4) close to the unlocking member (3).

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