Locking device for circuit breaker and circuit breaker

Abstract

This invention relates to the field of low-voltage electrical appliances, specifically to a locking device and a circuit breaker including the locking device, wherein: when the button is in the open position and the locking member is in the protruding position, the locking part and the button stop are misaligned, allowing the button to slide to the closed position along the closing direction; when the button is in the open position and the locking head is pressed by external force causing the locking member to slide into the housing to the retracted position, the locking part and the button stop are relatively limited to prevent the button from sliding to the closed position along the closing direction; when the button is in the closed position, the blocking part and the locking member are relatively limited to prevent the locking member from sliding into the housing to the retracted position; when the button slides to the unlocked position along the open direction from the open position, the button driving part drives the locking member to slide into the housing to the retracted position through the driven part of the locking member, with the open direction and the closing direction being opposite to each other; the locking device and the circuit breaker have good operational stability and reliability.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a locking device for a circuit breaker and a circuit breaker including the locking device. Background Technology

[0002] Existing plug-in circuit breakers are equipped with a locking device, which includes a locking element with a locking head protruding outside the circuit breaker housing. Before the plug-in circuit breaker is installed in the installation position, if the circuit breaker closes when the button is pressed, the locking element is limited by the button, preventing the locking head from moving into the circuit breaker housing. However, when the plug-in circuit breaker is inserted into the installation position, it interferes with the housing of the installation position, preventing the plug-in circuit breaker from being inserted. During the insertion process, the locking head is pressed into the circuit breaker housing by the housing of the installation position, causing the locking element to limit the button and prevent the button from being pressed to drive the plug-in circuit breaker to close. When the plug-in circuit breaker is in the installation position, pressing the button activates the circuit breaker. After closing, the button limit locking mechanism prevents the locking head from moving into the circuit breaker housing, thus ensuring reliable limiting of the locking head against the housing at the circuit breaker mounting position. This prevents the circuit breaker from being pulled out of the mounting position while closed. In this case, the button must first be pulled to open the plug-in circuit breaker, and then the button must be pulled further to drive the locking mechanism into the circuit breaker housing, releasing the limiting engagement between the locking head and the housing at the circuit breaker mounting position. Only then can the plug-in circuit breaker be pulled out of the mounting position. In summary, the locking device can prevent the plug-in circuit breaker from being accidentally closed before or during installation, and from being pulled out while closed, thus ensuring the personal safety of operators. However, existing locking devices often suffer from problems such as complex structure, cumbersome installation, and low reliability. Furthermore, due to the limited structural strength and operating characteristics of the locking mechanism, existing plug-in circuit breakers still pose a risk of being inserted into or pulled out of the mounting position while closed, even with the locking device alone. Summary of the Invention

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a locking device for a circuit breaker and a circuit breaker including the locking device, wherein the locking device has good operational stability and reliability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A locking device for a circuit breaker includes a circuit breaker housing, a locking member and a button of the circuit breaker slidably disposed on the housing, and a locking elastic member; the button is movable between a closed position and an open position to drive the circuit breaker to close and open; the locking member is slidable between a protruding position and a retracted position; when the locking member is in the protruding position, the locking head of the locking member protrudes outside the housing; the locking elastic member acts on the locking member to keep it in the protruding position.

[0006] The locking component further includes a locking component moving part and a locking part;

[0007] The button includes a button driver, a button stop, and a blocking part;

[0008] When the button is in the open position and the locking member is in the protruding position, the locking part is misaligned with the button stop, allowing the button to slide to the closed position along the closing direction.

[0009] When the button is in the open position and the locking head is squeezed by external force, causing the locking member to slide into the housing to the retracted position, the locking part and the button stop are relatively limited to prevent the button from sliding to the closed position along the closing direction.

[0010] When the button is in the closed position, the blocking part and the locking part are relatively limited to prevent the locking part from sliding into the housing to the retracted position.

[0011] When the button is slid from the open position to the unlocked position along the open direction, the button driving part drives the locking part to slide into the housing to the retracted position through the driven part of the locking part. The open direction and the close direction are opposite to each other.

[0012] Furthermore, the sliding directions of the button and the locking element are perpendicular to each other.

[0013] Furthermore, when the button is in the closed position, the blocking part and the locking part are relatively limited to prevent the locking part from sliding into the housing to the retracted position.

[0014] Furthermore, the blocking part, the button stop, and the button driving part are sequentially arranged on the button along the closing direction; the locking part and the locking member driven part are sequentially arranged on the locking member along the closing direction.

[0015] When the button is in the open position and the locking head is pressed by external force, causing the locking member to slide into the housing to the retracted position, the locking part and the button stop are relatively limited and engaged along the sliding direction of the button; when the button is in the closed position, the blocking part and the locking part are relatively limited and engaged along the sliding direction of the locking member.

[0016] Furthermore, the button and the locking member are stacked on top of each other. The button also includes a button contact surface. The locking part and the locking member driven part are disposed on the side of the locking member facing the button contact surface and slide in contact with the button contact surface respectively.

[0017] Furthermore, the button driver, button stop, and blocking part are all disposed on the button contact surface.

[0018] Furthermore, the housing includes a locking member groove, a locking hole, and a locking member guide rail structure. The locking hole is located on the side wall of the housing and communicates with the locking member groove. The locking member is slidably disposed in the locking member groove, and the locking head protrudes from the outside of the housing through the locking hole. The locking member slides in cooperation with the locking member guide rail structure to limit the sliding path of the locking member.

[0019] Furthermore, the locking element guide rail structure is disposed on the bottom wall of the locking element slide groove, and the locking element guide rail structure includes a locking element track groove and / or a locking element track rib; the locking element includes a locking element slide rib that slides with the locking element track groove and / or a locking element guide groove that slides with the locking element track rib.

[0020] Furthermore, the locking component also includes a locking component body, a locking head disposed on the outer side of the locking component body and located at one end of the locking component body, the other end of the locking component body being slidably inserted into the locking component groove, the locking component moving part and the locking part being disposed on the upper side of the locking component, and the locking component guide groove and / or the locking component sliding rib being disposed on the lower side of the locking component, the upper side and the lower side being disposed opposite to each other, and the outer side being located between the upper side and the lower side.

[0021] Furthermore, the locking elastic element is a compression spring, which is disposed between the locking element and the side wall of the locking element groove.

[0022] Furthermore, the button driving part includes a driving inclined surface, which slides in contact with the locking member driven part and moves relative to the locking member driven part in the opening direction to make the locking member slide to the retracted position.

[0023] Furthermore, the button driving part also includes a retaining side that is bent and connected to one end of the driving inclined surface. When the button is in the unlocked position, the retaining side and the moving part of the locking member are relatively limited and engaged in the sliding direction of the locking member, so as to keep the locking member in the retracted position.

[0024] Furthermore, the button driving part also includes a transition side that is bent and connected to one end of the driving inclined surface. During the process of the button sliding from the open position to the unlock position along the opening direction, the transition side slides and engages with the moving part of the locking member before the driving inclined surface.

[0025] Furthermore, the driven part of the locking member includes an arc-shaped surface that mates with the driving inclined surface.

[0026] A circuit breaker including the aforementioned locking device.

[0027] Furthermore, the circuit breaker also includes an anti-pull-out device, which includes an anti-pull-out member. The anti-pull-out member has a clearance position and a blocking position. In the blocking position, the anti-pull-out head of the anti-pull-out member protrudes outside the housing.

[0028] The button slides along the closing direction to the closing position, which drives the anti-pull-out component to slide from the avoidance position to the blocking position outside the housing.

[0029] The button slides along the opening direction to the opening position, which drives the anti-pull-out component to slide from the blocking position into the housing to the avoidance position;

[0030] When the button slides between the open and unlocked positions, the anti-pull-out component is kept in the avoidance position.

[0031] Furthermore, the housing also includes an anti-pull hole, and the anti-pull head protrudes outside the housing through the anti-pull clearance hole; the anti-pull hole and the locking hole of the housing are the same opening provided on the side wall of the housing.

[0032] The locking device and circuit breaker of the present invention, wherein the cooperation between the button and the locking member prevents the circuit breaker from being installed in the circuit breaker mounting position while closed, prevents it from being closed during installation, and prevents it from being pulled out of the circuit breaker mounting position while closed, thus avoiding the risk of electric shock during installation and removal of the circuit breaker and ensuring the personal safety of operators. Moreover, the locking member is slidably designed, requiring little installation space. Furthermore, the button and the locking member establish a first limiting cooperation through the locking part and the button stop, and a second limiting cooperation through the blocking part and the locking member. The button driving part cooperates with the locking member's driven part to drive the locking member to slide from the protruding position to the retracted position. That is, the button and the locking member achieve different cooperation methods through different structures, and the cooperation between the two is reliable and stable, ensuring the reliable and stable operation of the locking device.

[0033] Furthermore, the blocking part, button stop, and button drive part are sequentially arranged on the button along the closing direction, and the locking part and the locking member driven part are sequentially arranged on the locking member along the closing direction. The layout of each part is reasonable and orderly, which facilitates the design and manufacturing of the locking member and the button.

[0034] Furthermore, the locking element and the locking element's driven part are disposed on the side of the locking element facing the button contact surface and slide in contact with the button contact surface respectively, which further improves the stability and reliability of the locking element's sliding action.

[0035] In addition, the button works in conjunction with the anti-pull-out component to prevent the circuit breaker from being installed in the circuit breaker mounting position while it is closed, and to prevent the circuit breaker from being pulled out of the circuit breaker mounting position while it is closed, thereby avoiding the risk of electric shock when installing and removing the circuit breaker and ensuring the personal safety of the operators.

[0036] Furthermore, the anti-pull-out device, with its button cooperating with the anti-pull-out component, prevents the circuit breaker from being installed in the circuit breaker mounting position while closed, and prevents the circuit breaker from being pulled out of the circuit breaker mounting position while closed, thus avoiding the risk of electric shock during the installation and removal of the circuit breaker and ensuring the personal safety of the operators. Moreover, the anti-pull-out component is slidably designed, requiring little installation space. Furthermore, the anti-pull-out component slides between the avoidance position and the blocking position, driven by the button, ensuring the reliability of the anti-pull-out component's operation. The anti-pull-out device, in conjunction with the locking device, further improves the safety of the entire process of circuit breaker installation and removal. Attached Figure Description

[0037] Figure 1 This is a projected diagram of the circuit breaker of the present invention;

[0038] Figure 2 This is a schematic diagram of the circuit breaker of the present invention, in which the anti-pull-out component is located in the avoidance position and the locking component is located in the protruding position;

[0039] Figure 3 This is a schematic diagram of the circuit breaker of the present invention, with the anti-pull-out component located in the blocking position;

[0040] Figure 4 This is a structural schematic diagram of the button of the present invention from one viewpoint;

[0041] Figure 5 This is a structural schematic diagram of the button of the present invention from another perspective;

[0042] Figure 6 This is a schematic diagram of the locking component of the present invention;

[0043] Figure 7 This is a schematic diagram of the anti-pull-out component of the present invention;

[0044] Figure 8 This is a schematic diagram of the cooperation between the locking member and the button of the present invention, with the button in the unlocked position and the locking member in the retracted position;

[0045] Figure 9 This is a schematic diagram of the cooperation between the locking member and the button of the present invention. During the process of the button moving from the open position to the unlocked position, the driven part of the locking member and the transition side cooperate with each other.

[0046] Figure 10 This is a schematic diagram of the cooperation between the locking member and the button of the present invention. The button is in the unlocked position, and the driven part of the locking member is engaged with the retaining side.

[0047] Figure 11 This is a schematic diagram of the structure of the housing of the present invention;

[0048] Figure 12 This is a schematic diagram of the cooperation between the locking member and the button of the present invention. When the button is in the closed position, the locking part cooperates with the blocking part along the sliding direction of the locking member.

[0049] Explanation of reference numerals in the attached figures

[0050] Button 1;

[0051] Button body 10; button head 100; button drive part 11; transition side 11-1; drive slope 11-2; retaining side 11-3; button connecting hole 12; button stop 13; blocking part 17; button contact surface 18; button drive shaft 19;

[0052] Anti-pull-out component 2;

[0053] Anti-pull-out component mating part 20; mating hole 20-0; first limiting section 20-01; first limiting surface 20-010; mating section 20-02; inner mating inclined surface 20-020; outer mating inclined surface 20-021; second limiting section 20-03; second limiting surface 20-030; anti-pull-out component guide hole 20-1; anti-pull-out head 21;

[0054] Locking component 3;

[0055] Outer side 3o; Inner side 3i; Upper side 3u; Lower side 3d; Locking body 30; Locking driven part 31; Locking part 32; Locking guide groove 34; Locking sliding rib 35; Locking spring hole 36;

[0056] Locking elastic element 4;

[0057] Casing 5;

[0058] Anti-pull-out component slide groove 50; anti-pull-out component guide rail rib 51; drive shaft slide groove 52; locking component slide groove 53; locking component track groove 54; locking component track rib 55;

[0059] Link 6;

[0060] Operating mechanism o. Detailed Implementation

[0061] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions in the following embodiments.

[0062] like Figure 1-11 The diagram shows an embodiment of the circuit breaker of the present invention, which is preferably a plug-in type circuit breaker.

[0063] like Figure 1 As shown, the plug-in circuit breaker in this embodiment includes a button 1, a housing 5, a connecting rod 6, an operating mechanism o, and a contact system. The button 1 is slidably mounted on the housing 5, with one end inserted inside the housing 5 and connected to the operating mechanism o via the connecting rod 6, and the other end protruding outside the housing 5 for operation. The contact system includes a moving contact structure and a stationary contact structure that work together. The moving contact structure is connected to the operating mechanism o. The button 1 can move between the closed and open positions to drive the circuit breaker to close and open. When the button 1 is driven by an external force to slide to the closed position along the closing direction, the moving contact structure and the stationary contact structure are closed via the connecting rod 6 and the operating mechanism o, thus closing the circuit breaker; that is, pressing the button 1 closes the circuit breaker. The button 1 is driven by external force to slide to the open position along the opening direction. Through the connecting rod 6 and operating mechanism o, the moving contact structure is driven to separate from the stationary contact, thus opening the circuit breaker; that is, pulling the button 1 opens the circuit breaker. The closing direction and the opening direction are opposite to each other. Specifically, as shown... Figure 1 As shown, the closing direction is the downward movement of button 1, and the opening direction is the upward movement of button 1. The operating mechanism o can be implemented using existing technology and will not be described further here.

[0064] like Figure 1-2As shown in Figures 8-10, the circuit breaker in this embodiment also includes a locking device, which includes a button 1, a locking element 3, a locking elastic element 4, and a housing 5. The locking element 3 is slidably disposed on the housing 5. The locking element 3 has a protruding position and a retracted position. The locking element 3 switches between the protruding position and the retracted position by sliding. When the locking element 3 is in the protruding position, the locking head 33 of the locking element 3 protrudes outside the housing 5. The locking elastic element 4 acts on the locking element 3 to keep it in the protruding position. The button 1 has an unlocking position, an open position, and a closing position arranged sequentially. The button 1 switches between the unlocking position, the open position, and the closing position by sliding. When the button 1 is in the open position, it slides along the closing direction. When switching to the closing position, button 1 slides to the opening position along the opening direction. When button 1 is in the opening position and locking member 3 is in the protruding position, button 1 is allowed to slide to the closing position along the closing direction. When button 1 is in the opening position and locking head 3 is pressed by external force and slides to the retracted position, locking head 3 and button 1 establish a first limiting engagement to prevent button 1 from moving to the closing position along the closing direction. When button 1 is in the closing position, button 1 and locking member 3 establish a second limiting engagement to prevent locking member 3 from sliding into the housing 5 to the retracted position. When button 1 is in the opening position, button 1 slides to the unlocked position along the opening direction, driving locking member 3 to slide into the housing 5 to the retracted position. Furthermore, when locking member 3 is in the retracted position, locking head 33 is completely retracted into the housing 5, or at least partially retracted into the housing 5 (that is, locking head 33 is not completely retracted into the housing 5, but the portion of locking head 33 protruding outside the housing 5 is reduced compared to when locking member 3 is in the protruding position).

[0065] The locking device: When the circuit breaker is not installed in the circuit breaker mounting position (the circuit breaker mounting position is a cabinet, distribution cabinet, or distribution box), if button 1 moves from the open position to the closed position, that is, the circuit breaker is closed, button 1 and locking member 3 establish a second limit engagement. Therefore, locking member 3 cannot move from the protruding position to the retracted position within the housing 5. At this time, if the circuit breaker is inserted into the circuit breaker mounting position, the locking head 33 of locking member 3 is blocked by the housing of the circuit breaker mounting position (that is, the housing of the cabinet, distribution cabinet, or distribution box), preventing the circuit breaker from being installed in place, meaning the circuit breaker will not connect. External circuit; During the process of inserting the circuit breaker into the circuit breaker mounting position, the locking head of the locking member 3 is pressed by external force and moves from the protruding position to the retracted position from the housing 5. The locking member 3 and the button 1 establish a first limit engagement. At this time, the button 1 cannot slide to the closing position in the closing direction, that is, the circuit breaker cannot be closed. After the circuit breaker is installed in place, the locking head 33 of the locking member 3 is aligned with the clearance hole of the circuit breaker mounting position. The locking head 33 is no longer pressed by the housing of the circuit breaker mounting position, allowing the locking member 3 to slide from the clearance position to the protruding position from the housing 5. The locking member 3 and the button 1 then engage in a first limit engagement. 1. Release the first limiting engagement, thereby allowing button 1 to slide to the closing position along the closing direction, which means allowing the circuit breaker to close. When the circuit breaker is in the circuit breaker mounting position and in the closed state, button 1 establishes a second limiting engagement with locking member 3. Locking member 3 cannot slide into the housing 5 to the retracted position, so that the locking head 33 of locking member 3 maintains a limiting engagement with the housing of the circuit breaker mounting position (that is, the locking head 33 is inserted into the clearance hole of the circuit breaker mounting position). At this time, the circuit breaker cannot be pulled out of the circuit breaker mounting position. Only when button 1 finally slides to the unlocked position along the opening direction can it be driven. The locking element 3 slides into the housing 5 to the retracted position, releasing the locking head 33 from the housing of the circuit breaker mounting position, allowing the circuit breaker to be pulled out of the mounting position. Therefore, the cooperation between the button 1 and the locking element 3 prevents the circuit breaker from being installed in the circuit breaker mounting position while closed, prevents it from being closed during installation, and also prevents the circuit breaker from being pulled out of the mounting position while closed, avoiding the risk of electric shock during installation and removal of the circuit breaker and ensuring the personal safety of the operators. Moreover, the sliding locking element 3 requires little installation space.

[0066] like Figure 1 , 8 As shown in Figure -10, the sliding directions of the button 1 and the locking member 3 are perpendicular to each other.

[0067] like Figure 1-2As shown in Figures 4-6 and 8-10, the locking member 3 further includes a locking member driven part 31 and a locking part 32; the button 1 includes a button driving part 11, a button stop 13, and a blocking part 17; when the button 1 is in the open position and the locking member 3 is in the protruding position, the locking part 32 and the button stop 13 are misaligned, allowing the button 1 to slide to the closed position along the closing direction, that is, allowing the circuit breaker to close; when the button 1 is in the open position and the locking head 33 is pressed by external force and slides to the retracted position, the locking part 32 and the button stop 13 are relatively limited and engaged. That is, button 1 and locking member 3 establish a first limiting engagement, preventing button 1 from moving to the closing position along the closing direction, which also prevents the circuit breaker from closing; when button 1 is in the closing position, the blocking part 17 and locking member 3 establish a relative limiting engagement, that is, button 1 and locking member 3 establish a second limiting engagement, preventing locking member 3 from sliding into the housing 5 to the retracted position; when button 1 is in the opening position, button 1 slides along the opening direction to the unlocked position, causing the button driving part 11 to drive the locking member 3 to slide into the housing 5 to the retracted position through the locking member driven part 31. Specifically, as shown... Figure 1 As shown, button 1 slides up and down to switch between the closed and open positions, while locking member 3 slides left and right to switch between the protruding and retracted positions. Button 1 and locking member 3 establish a first limiting engagement through locking part 32 and button stop 13, and a second limiting engagement through blocking part 17. Button driving part 11 and locking member driven part 31 cooperate to drive locking member 3 to slide from the protruding position to the retracted position. That is, button 1 and locking member 3 achieve different engagement methods through different structures. Their engagement is reliable and stable, ensuring the reliable and stable operation of the locking device. Furthermore, as... Figure 8 As shown, when the button 1 and the locking member 3 establish the first limit engagement, there is a engagement gap between the locking part 32 and the button stop 13, which means that the button 1 is allowed to slide a certain distance in the closing direction but cannot slide to the closing position, thereby ensuring that the locking member 3 can smoothly slide from the protruding position to the retracted position and ensuring the reliable operation of the locking device.

[0068] like Figure 2 , 4As shown in Figures -6, 8, 10, and 12, the blocking part 17, the button stop 13, and the button drive part 11 are sequentially arranged on the button 1 along the closing direction; the locking part 32 and the locking member driven part 31 are sequentially arranged on the locking member 3 along the closing direction. The layout of each part is reasonable and orderly, which facilitates the design and manufacture of the locking member 3 and the button 1. Furthermore, when the button 1 is in the open position and the locking head 33 is squeezed by external force, causing the locking member 3 to slide into the housing 5 to the retracted position, the locking part 32 and the button stop 13 are relatively limited and engaged along the sliding direction of the button 1; when the button 1 is in the closed position, the blocking part 17 and the locking member 3 are limited and engaged along the sliding direction of the locking member 3 (not shown in the figure). Furthermore, when the button 1 is in the closed position, the blocking part 17 and the locking part 32 of the locking member 3 are relatively limited and engaged along the sliding direction of the locking member 3, preventing the locking member 3 from sliding from the protruding position into the housing to the retracted position.

[0069] Specifically, such as Figure 8 As shown, when the button 1 is in the open position and the locking member 3 is in the retracted position, the locking part 32 is perpendicular to the sliding direction of the button 1 and is relatively limited to the button stop 13 along the sliding direction of the locking member 3, preventing the button 1 from sliding from the open position to the closed position along the closing direction.

[0070] Specifically, such as Figure 12 As shown, when the button 1 is in the closed position, the side of the locking part 32 perpendicular to the sliding direction of the locking member 3 is relatively limited and engaged with the blocking part 17, preventing the locking member 3 from sliding from the protruding position to the retracted position. Furthermore, when the button 1 is in the closed position, the side of the locking member's activated part 31 perpendicular to the sliding direction of the locking member 3 is relatively limited and engaged with the button stop 13 along the sliding direction of the locking member 3, preventing the locking member 3 from sliding from the protruding position to the retracted position.

[0071] like Figure 1 , 8 As shown in Figure -10, the button 1 and the locking member 3 are stacked. The button 1 also includes a button contact surface 18. The locking part 32 and the locking member driven part 31 are disposed on the side of the locking member 3 facing the button contact surface 18 and are in sliding contact with the button contact surface 18, further improving the stability and reliability of the sliding action of the locking member 3. Furthermore, the button driving part 11, the button stop 13, and the blocking part 17 are all disposed on the button contact surface 18, and the three are located on the same side of the button contact surface 18. Furthermore, the locking member 3 is slidably disposed between the button contact surface 18 and the housing 5.

[0072] like Figure 2 and 11As shown, the housing 5 includes a locking member groove 53, a locking hole, and a locking member guide rail structure. The locking hole is located on the side wall of the housing 5 and communicates with the locking member groove 53. The locking member 3 is slidably disposed within the locking member groove 53, and the locking head 33 protrudes from the outside of the housing 5 through the locking hole. The locking member 3 slides with the locking member guide rail structure to define the sliding path of the locking member 3. Further, the locking member guide rail structure is located on the bottom wall of the locking member groove 53 and includes a locking member track groove 54 and / or a locking member track rib 55. The locking member 3 includes a locking member sliding rib 35 that slides with the locking member track groove 54 and / or a locking member guide groove 34 that slides with the locking member track rib 55. Further, the locking member guide rail structure includes both the locking member track groove 54 and the locking member track rib 55 arranged side-by-side, and the locking member 3 includes both the locking member sliding rib 35 and the locking member guide groove 34 arranged side-by-side.

[0073] like Figure 1-2 As shown in Figures 6 and 7, the locking elastic element 4 is a compression spring, which is disposed between the side walls of the locking element 3 and the locking element slide groove 53. Furthermore, the locking element 3 is provided with a locking element spring hole 36, and the side wall of the locking element slide groove 53 is provided with a housing spring groove. The two ends of the locking elastic element 4 are respectively located within the locking element spring hole 36 and the housing spring groove.

[0074] like Figure 5 , 9 As shown in Figure -10, the button driving part 11 includes a driving inclined surface 11-2. One end of the driving inclined surface 11-2 away from the open position of the button 1 is inclined away from the side where the locking head 33 is located, relative to the end of the driving inclined surface 11-2 near the open position of the button 1. The driving inclined surface 11-2 slides in contact with the locking member driven part 31 and moves relative to the locking member driven part 31 in the open direction, causing the locking member 3 to slide into the housing 5 to the retracted position. That is, when the button 1 slides from the open position to the unlocked position along the open direction, it drives the driving inclined surface 11-2 to slide relative to the locking member driven part 31, causing the locking member 3 to slide into the housing 5 to the retracted position. Furthermore, the locking member driven part 31 includes an arc-shaped surface that cooperates with the driving inclined surface 11-2, thereby reducing the sliding friction between the two.

[0075] like Figure 5 , 9 As shown in Figure -10, the button driving part 11 further includes a retaining side 11-3 that is bent and connected to one end of the driving inclined surface 11-2. When the button 1 is in the unlocked position, the retaining side 11-3 and the locking member driven part 31 are relatively limited and engaged in the sliding direction of the locking member 3, thus holding the locking member 3 in the retracted position. Furthermore, the retaining side 11-3 is parallel to the sliding direction of the button 1 and perpendicular to the sliding direction of the locking member 3.

[0076] like Figure 5 , 9 As shown in Figure -10, the button driving unit 11 further includes a transition side surface 11-1 that is bent and connected to one end of the driving inclined surface 11-2. During the sliding of the button 1 from the open position to the unlocked position along the opening direction, the transition side surface 11-1 slides and engages with the locking member's driven part 31 before the driving inclined surface 11-2, thereby ensuring that the driving inclined surface 11-2 can smoothly establish a working relationship with the locking member's driven part 31. Furthermore, the transition side surface 11-1 is parallel to the sliding direction of the button 1 and perpendicular to the sliding direction of the locking member 3. Furthermore, the transition side surface 11-1 is offset relative to the holding side surface 11-3 towards the locking head 33 of the locking member 3.

[0077] like Figure 6 As shown, this is one embodiment of the locking member 3: The locking member 3 further includes a locking member body 30, a locking head 33 is disposed on the outer side 3o of the locking member body 30 and located at one end of the locking member body 30, the other end of the locking member body 30 is slidably inserted into the locking member groove 53, the locking member driven part 31 and the locking part 32 are disposed on the upper side 3u of the locking member 3, the locking member guide groove 34 and / or the locking member sliding rib 35 are disposed on the lower side 3d of the locking member 3, the upper side 3u and the lower side 3d are arranged opposite to each other, and the outer side 3o is located between the upper side 3u and the lower side 3d. Further, the locking member spring hole 36 is disposed on the inner side 3i of the locking member body 30, the inner side 3i and the outer side 3o are arranged opposite to each other. Further, the locking member body 30 has a quadrangular prism structure.

[0078] like Figure 1-5As shown in Figures 7 and 11, the circuit breaker in this embodiment also includes an anti-pull-out device. The anti-pull-out device includes an anti-pull-out member 2, which has a clearance position and a blocking position. In the blocking position, the anti-pull-out head 21 of the anti-pull-out member 2 protrudes outside the housing 5. When the button 1 slides to the closing position along the closing direction, it drives the anti-pull-out member 2 to slide from the clearance position to the outside of the housing 5 to the blocking position. That is, when the button 1 is pressed to close the circuit breaker, the button 1 drives the anti-pull-out member 2 to slide to the blocking position. When the button 1 slides to the opening position along the opening direction, it drives the anti-pull-out member 2 to slide from the blocking position to the inside of the housing 5 to the clearance position. At the same time, the anti-pull-out member 2 drives the anti-pull-out head 2 to move inside the housing 5. That is, when the button 1 is pulled to open the circuit breaker, the button 1 drives the anti-pull-out member 2 to slide to the clearance position. The anti-pull-out device achieves the following technical effects: When the circuit breaker is not installed in the circuit breaker mounting position, the button 1 slides to the closed position, causing the anti-pull-out member 2 to slide to the blocking position. The anti-pull-out head 21 of the anti-pull-out member 2 protrudes outside the housing 5. At this time, when the circuit breaker is inserted into the circuit breaker mounting position, the anti-pull-out head 21 will be blocked by the housing of the circuit breaker mounting position, preventing the circuit breaker from being inserted into the circuit breaker mounting position. After the circuit breaker is installed in the circuit breaker mounting position, the button 1 slides to the closed position, causing the circuit breaker to close. At the same time, it drives the anti-pull-out member 2 to slide to the blocking position. The anti-pull-out head 21 of the anti-pull-out member 2 is in contact with the circuit breaker mounting position. The button 1 and the anti-pull-out component 2 are aligned and inserted into each other to prevent the circuit breaker from being pulled out of its mounting position while in the closed state. Therefore, the button 1, in conjunction with the anti-pull-out component 2, prevents the circuit breaker from being installed in its mounting position while in the closed state, and prevents it from being pulled out of its mounting position while in the closed state, thus avoiding the risk of electric shock during installation and removal of the circuit breaker and ensuring the personal safety of the operators. Moreover, the anti-pull-out component 2 is slidably designed, requiring little installation space. Furthermore, the anti-pull-out component 2 slides between the clearance position and the blocking position, driven by the button 1, ensuring the reliability of its operation. Further, when the button 1 switches between the open and unlocked positions, it keeps the anti-pull-out component 2 in the clearance position. That is, during the process of switching between the open and unlocked positions by sliding the button 1, the anti-pull-out component 2 is limited by the button 1 to the clearance position, and its position remains unchanged, so that the anti-pull-out component 2 does not affect the button 1's drive of the locking component 3 to slide from the protruding position to the retracted position. Furthermore, when the anti-pull-out member 2 is in the avoidance position, the anti-pull-out head 21 is completely retracted into the housing 5, or at least partially retracted into the housing 5 (that is, the anti-pull-out head 21 is not completely retracted into the housing 5, but the portion of the anti-pull-out head 21 protruding outside the housing 5 is reduced compared to when the anti-pull-out member 2 is in the blocking position).

[0079] like Figure 2-3 As shown, the sliding directions of the button 1 and the anti-pull-out component 2 are perpendicular to each other.

[0080] like Figure 3 and 7As shown, the anti-pull-out head 21 includes blocking surfaces disposed on both sides of it and parallel to the sliding direction of the anti-pull-out member 2, thereby ensuring that the anti-pull-out member 2 will not slide from the blocking position to the avoidance position when the blocking surfaces are squeezed. That is, when the circuit breaker is inserted into the circuit breaker mounting position in the closed state, the housing of the circuit breaker mounting position will squeeze one blocking surface; when the circuit breaker is in the circuit breaker mounting position and in the closed state, pulling the circuit breaker will cause the housing of the circuit breaker mounting position to squeeze the other blocking surface. In neither of these situations will cause the anti-pull-out member 2 to slide from the blocking position to the avoidance position. Furthermore, the anti-pull-out head 21 has a square structure.

[0081] like Figure 2-3 As shown in Figure 7, the anti-pull-out component 2 further includes an anti-pull-out component mating part 20. The anti-pull-out component mating part 20 includes a mating hole 20-0 disposed in its middle. The mating hole 20-0 includes an inner mating inclined surface 20-020 and an outer mating inclined surface 20-021 disposed on its side wall. The inner mating inclined surface 20-020 and the outer mating inclined surface 20-021 are arranged parallel to each other. The button drive shaft 19 of the button 1 is inserted into the mating hole 20-0. The button drive shaft 19 slides in contact with the inner mating inclined surface 20-020 and moves relative to the inner mating inclined surface 20-020 in the opening direction, causing the anti-pull-out component 2 to slide to the avoidance position. That is, when the button 1 moves from the opening position to the closing position in the closing direction to close the circuit breaker, the button 1 drives the button drive shaft 19. Shaft 19 moves relative to the inner mating inclined surface 20-020 in the closing direction. The button drive shaft 19 slides in contact with the inner mating inclined surface 20-020, driving the anti-pull-out member 2 to move from the blocking position into the housing 5 to the avoidance position. The button drive shaft 19 slides in contact with the outer mating inclined surface 20-021 and moves relative to the outer mating inclined surface 20-021 in the closing direction, causing the anti-pull-out member 2 to slide towards the blocking position. That is, when the button 1 moves from the closing position to the opening position in the opening direction to open the circuit breaker, the button 1 drives the button drive shaft 19 to move relative to the outer mating inclined surface 20-021 in the opening direction. The button drive shaft 19 slides in contact with the outer mating inclined surface 20-021, driving the anti-pull-out member 2 to move from the avoidance position outward from the housing 5 to the blocking position. Furthermore, the end of the inner mating inclined surface 20-020 near the opening position of button 1 is inclined towards the side where the anti-pull-out head 21 is located, relative to the end of the inner mating inclined surface 20-020 away from the opening position of button 1.

[0082] like Figure 2-3As shown in Figure 7, the mating hole 20-0 also includes a first limiting surface 20-010 disposed on its side wall. One end of the first limiting surface 20-010 is bent and connected to one end of the outer mating inclined surface 20-020. The button drive shaft 19 is limited and engaged with the first limiting surface 20-010 to limit the anti-pull-out member 2 in the blocking position. That is, when the anti-pull-out member 2 is in the blocking position, the button drive shaft 19 and the first limiting surface 20-010 are relatively limited and engaged along the sliding direction of the anti-pull-out member 2 (in the sliding direction of the anti-pull-out member 2, the button drive shaft 19 is located between the first limiting surface 20-010 and the anti-pull-out head 21), preventing the anti-pull-out member 2 from sliding into the housing 5 and limiting the anti-pull-out member 2 in the blocking position. The transmission structure between the anti-pull-out member 2 and the button 1 is simple and reliable, ensuring the reliable and stable operation of the anti-pull-out device. Furthermore, the first limiting surface 20-010 is perpendicular to the sliding direction of the anti-pull-out member 2 and parallel to the sliding direction of the button 1.

[0083] like Figure 2-3 As shown in Figure 7, the mating hole 20-0 further includes a second limiting surface 20-030 disposed on its side wall. One end of the second limiting surface 20-030 is bent and connected to one end of the inner mating inclined surface 20-020. The button drive shaft 19 and the second limiting surface 20-030 engage in a limiting fit to limit the anti-pull-out member 2 to the avoidance position. That is, when the anti-pull-out member 2 is in the avoidance position, the button drive shaft 19 and the second limiting surface 20-030 are relatively limited in the sliding direction of the anti-pull-out member 2 (in the sliding direction of the anti-pull-out member 2, the second limiting surface 20-030 is located between the button drive shaft 19 and the anti-pull-out head 21), preventing the anti-pull-out member 2 from sliding out of the housing 5 and limiting the anti-pull-out member 2 to the avoidance position. Furthermore, the second limiting surface 20-030 is perpendicular to the sliding direction of the anti-pull-out member 2 and parallel to the sliding direction of the button 1.

[0084] Specifically, such as Figure 2-3As shown in Figure 7, the mating hole 20-0, in its cross-section, includes a first limiting segment 20-01, a mating segment 20-02, and a second limiting segment 20-03 that are bent and connected in sequence. An inner mating inclined surface 20-020 and an outer mating inclined surface 20-021 are respectively disposed on a pair of sidewalls of the mating segment 20-02. A first limiting surface 20-010 is disposed on the sidewall of the first limiting segment 20-01, and a second limiting surface 20-030 is disposed on the sidewall of the second limiting segment 20-03. Further, the mating hole 20-0, in its cross-section, has a Z-shaped structure; the mating end 20-02, in the sliding direction of the anti-pull-out member 2, is located between the first limiting segment 20-01 and the second limiting segment 20-03; the angle between the mating segment 20-02 and the first limiting segment 20-01 is an obtuse angle, and the angle between the mating segment 20-02 and the second limiting segment 20-03 is also an obtuse angle. Furthermore, the first limiting surface 20-010 and the second limiting surface 20-030 are arranged parallel to each other and are both perpendicular to the sliding direction of the anti-pull-out member 2. Furthermore, the anti-pull-out member mating part 20 has a Z-shaped plate structure, comprising a first segment, a second segment, and a third segment connected by sequential bending. The first limiting segment 20-01 is located in the middle of the first segment, the mating segment 20-02 is located in the middle of the second segment, and the second limiting segment 20-03 is located in the middle of the third segment. The included angle between the first segment and the second segment is the same as the included angle between the first limiting segment 20-01 and the mating segment 20-02, and the included angle between the second segment and the third segment is the same as the included angle between the mating segment 20-02 and the second limiting segment 20-03.

[0085] like Figure 2-3 As shown in Figures 7 and 11, the housing 5 includes an anti-pull-out groove 50 and an anti-pull-out hole. The anti-pull-out hole is located on the side wall of the housing 5 and communicates with the anti-pull-out groove 50. The anti-pull-out member 2 is slidably disposed within the anti-pull-out groove 50, and the anti-pull-out head 21 protrudes from the outside of the housing 5 through the anti-pull-out hole. Further, the housing 5 also includes an anti-pull-out guide rib 51, which is located on the bottom wall of the anti-pull-out groove 50. The anti-pull-out member 2 also includes an anti-pull-out guide hole 20-1, which is slidably fitted onto the anti-pull-out guide rib 51 to limit the sliding path of the anti-pull-out member 2. Further, the anti-pull-out guide hole 20-1 is located on the anti-pull-out mating portion 20 of the anti-pull-out member 2, and the anti-pull-out guide hole 20-1 and the anti-pull-out head 21 are located at the same end of the anti-pull-out mating portion 20.

[0086] like Figure 1-3 As shown in Figure 11, the anti-pull-out hole and the locking hole are both located in the same housing opening on the side wall of the housing 5, which helps to simplify the structure of the housing 5. Furthermore, the locking head 33 of the locking member 3 and the anti-pull-out head 21 of the anti-pull-out member 2 are stacked and disposed in the aforementioned housing opening.

[0087] like Figure 11 As shown, in the housing 5, the locking member slide groove 53 and the anti-pull-out member slide groove 50 are arranged side by side along the sliding direction of the button 1. The housing 5 has a housing opening on one side of the intersection of the two.

[0088] like Figure 4-5 As shown in Figure 8, the button 1 also includes a button body 10 slidably disposed on the housing 5. One end of the button drive shaft 19 is connected to the button body 10, and the other end (that is, the free end of the button drive shaft 19) is in transmission engagement with the anti-pull-out component mating part 20. The button drive shaft 19 and the button body 10 are either an integral structure or a separate structure. In this embodiment, the button drive shaft 19 and the button body 10 are preferably separate structures.

[0089] like Figure 2-3 As shown in Figure 11, the housing 5 also includes a drive shaft groove 52. The free end of the button drive shaft 19 passes through the mating hole 20-0 and is slidably inserted into the drive shaft groove 52, thereby ensuring that the button drive shaft 19 will not deviate from its working position. Furthermore, the drive shaft groove 52 is provided on the bottom wall of the anti-pull-out member groove 50.

[0090] like Figure 4-5 As shown, this is an embodiment of the button 1: In the button 1, the button body 10 is slidably mounted on the housing 5, one end of which protrudes outside the housing 5 to form a button head 100 for operation, and the other end is inserted into the housing 5 and is used to be connected to the operating mechanism o via a connecting rod 6. The button drive shaft 19 is located in the middle of the button body 10 and is perpendicular to the sliding direction of the button 1. The button contact surface 18 is located on the end of the button body 10 away from the button head 100. The button drive part 11, the button stop 13, and the blocking part 17 are all located on the button contact surface 18 and are on the same side. The button head 100, the button drive shaft 19, the blocking part 17, the button stop 13, and the button drive part 11 are arranged sequentially along the sliding direction of the button 1. Furthermore, the button body 10 is provided with a drive shaft hole in the middle, and one end of the button drive shaft 19 is inserted into the drive shaft hole; the button body 10 is also provided with an oblong button connection hole 12 for hinged connection with the connecting rod 6. The oblong button hole 12 allows the button 1 to move from the open position to the unlocked position without moving the connecting rod 6 further.

[0091] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0092] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A locking device for a circuit breaker, comprising a circuit breaker housing (5), a locking member (3) and a button (1) of the circuit breaker respectively slidably disposed on the housing (5), and a locking elastic member (4); the button (1) is movable between a closed position and an open position for driving the circuit breaker to close and open; the locking member (3) is movable between a protruding position and a retracted position; when the locking member (3) is in the protruding position, the locking head (33) of the locking member (3) protrudes outside the housing (5); the locking elastic member (4) acts on the locking member (3) to keep it in the protruding position; characterized in that: The locking member (3) further includes a locking member driven part (31) and a locking part (32); The button (1) includes a button drive unit (11), a button stop (13), and a blocking unit (17); When the button (1) is in the open position and the locking member (3) is in the protruding position, the locking part (32) is misaligned with the button stop (13), allowing the button (1) to slide to the closed position along the closing direction; When the button (1) is in the open position and the locking head (33) is squeezed by external force, causing the locking part (3) to slide into the housing (5) to the retracted position, the locking part (32) and the button stop (13) are relatively limited to prevent the button (1) from sliding to the closed position along the closing direction; When the button (1) is in the closed position, the blocking part (17) and the locking part (3) are relatively limited to prevent the locking part (3) from sliding into the housing (5) to the retracted position; When the button (1) is slid from the open position to the unlock position along the open direction, the button driving part (11) drives the locking part (3) to slide into the housing (5) to the retracted position through the locking part driven part (31). The open direction and the close direction are opposite to each other.

2. The locking device for a circuit breaker according to claim 1, characterized in that: The sliding directions of the button (1) and the locking member (3) are perpendicular to each other.

3. The locking device for a circuit breaker according to claim 1, characterized in that: When the button (1) is in the closed position, the blocking part (17) and the locking part (32) are relatively limited to prevent the locking part from sliding into the housing (5) to the retracted position.

4. The locking device for a circuit breaker according to claim 3, characterized in that: The blocking part (17), the button stop (13), and the button driving part (11) are sequentially arranged on the button (1) along the closing direction; the locking part (32) and the locking member driven part (31) are sequentially arranged on the locking member (3) along the closing direction; When the button (1) is in the open position and the locking head (33) is squeezed by external force, causing the locking member (3) to slide into the housing (5) to the retracted position, the locking part (32) and the button stop (13) are relatively limited and engaged in the sliding direction of the button (1); when the button (1) is in the closed position, the blocking part (17) and the locking part (32) are relatively limited and engaged in the sliding direction of the locking member (3).

5. The locking device for a circuit breaker according to claim 1, characterized in that: The button (1) and the locking member (3) are stacked together. The button (1) also includes a button contact surface (18). The locking part (32) and the locking member driven part (31) are disposed on the side of the locking member (3) facing the button contact surface (18) and respectively slide in contact with the button contact surface (18).

6. The locking device for a circuit breaker according to claim 5, characterized in that: The button drive unit (11), button stop (13) and blocking part (17) are all provided on the button contact surface (18).

7. The locking device for a circuit breaker according to claim 1, characterized in that: The housing (5) includes a locking groove (53), a locking hole, and a locking guide structure. The locking hole is located on the side wall of the housing (5) and communicates with the locking groove (53). The locking member (3) is slidably disposed in the locking groove (53), and the locking head (33) protrudes out of the housing (5) through the locking hole. The locking member (3) slides and cooperates with the locking guide structure to limit the sliding path of the locking member (3).

8. The locking device for a circuit breaker according to claim 7, characterized in that: The locking guide rail structure is set on the bottom wall of the locking slide groove (53), and the locking guide rail structure includes the locking track groove (54) and / or the locking track rib (55); the locking member (3) includes the locking slide rib (35) that slides with the locking track groove (54) and / or the locking guide groove (34) that slides with the locking track rib (55).

9. The locking device for a circuit breaker according to claim 8, characterized in that: The locking member (3) further includes a locking member body (30), a locking head (33) is disposed on the outer side (3o) of the locking member body (30) and located at one end of the locking member body (30), and the other end of the locking member body (30) is slidably inserted into the locking member slide groove (53). The locking member driven part (31) and the locking part (32) are disposed on the upper side (3u) of the locking member (3), and the locking member guide groove (34) and / or the locking member slide rib (35) are disposed on the lower side (3d) of the locking member (3). The upper side (3u) and the lower side (3d) are disposed opposite to each other, and the outer side (3o) is located between the upper side (3u) and the lower side (3d).

10. The locking device for a circuit breaker according to claim 7, characterized in that: The locking elastic element (4) is a compression spring, which is disposed between the side wall of the locking element (3) and the locking element groove (53).

11. The locking device for a circuit breaker according to claim 1, characterized in that: The button drive unit (11) includes a drive ramp (11-2), which slides in contact with the locking member driven part (31) and moves relative to the locking member driven part (31) in the opening direction to make the locking member (3) slide to the retracted position.

12. The locking device for a circuit breaker according to claim 11, characterized in that: The button drive unit (11) also includes a retaining side (11-3) that is bent and connected to one end of the drive inclined surface (11-2). When the button (1) is in the unlocked position, the retaining side (11-3) and the locking member driven part (31) are relatively limited and engaged in the sliding direction of the locking member (3), so as to keep the locking member (3) in the retracted position.

13. The locking device for a circuit breaker according to claim 11, characterized in that: The button drive unit (11) also includes a transition side (11-1) that is bent and connected to one end of the drive inclined surface (11-2). During the process of the button (1) sliding from the open position to the unlock position along the opening direction, the transition side (11-1) slides and engages with the locking member driven part (31) before the drive inclined surface (11-2).

14. The locking device for a circuit breaker according to claim 11, characterized in that: The locking member driven part (31) includes an arc-shaped surface that cooperates with the driving inclined surface (11-2).

15. A circuit breaker, characterized in that: The circuit breaker includes the locking device as described in any one of claims 1-14.

16. The circuit breaker according to claim 15, characterized in that: The circuit breaker also includes an anti-pull-out device, which includes an anti-pull-out component (2). The anti-pull-out component (2) has a clearance position and a blocking position. In the blocking position, the anti-pull-out head (21) of the anti-pull-out component (2) protrudes outside the housing (5). The button (1) slides to the closing position along the closing direction, thereby driving the anti-pull-out component (2) to slide from the avoidance position to the outside of the housing (5) to the blocking position; The button (1) slides to the open position along the opening direction, thereby driving the anti-pull-out component (2) to slide from the blocking position into the housing (5) to the avoidance position; When the button (1) slides between the open and unlocked positions, the anti-pull-out component (2) is kept in the avoidance position.

17. The circuit breaker according to claim 16, characterized in that: The housing (5) also includes an anti-pull hole, and the anti-pull head (21) protrudes out of the housing (5) through the anti-pull clearance hole; the anti-pull hole and the locking hole of the housing (5) are the same opening provided on the side wall of the housing (5).

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