Auxiliary self-locking structure and circuit breaker

Abstract

And the auxiliary self-locking structure comprises a movably arranged locking piece and an auxiliary change-over switch, the cantilever can be switched between a switching-on position and a switching-off position along with rotation of the main shaft, the auxiliary change-over switch comprises a microswitch and a rotatably arranged lever, the cantilever is in driving fit with the lever and is in linkage fit with the locking piece, and the cantilever is provided with a critical position close to the switching-on position. The circuit breaker comprises the auxiliary self-locking structure. According to the auxiliary self-locking structure and the circuit breaker, the locking piece is arranged, the lever is driven by the cantilever to trigger the microswitch to switch signals of the auxiliary change-over switch, and the locking piece is unlocked with the lever under linkage of the cantilever to enable the lever to reset so as to reset the signals of the auxiliary change-over switch. When the cantilever is located between the opening position and the critical position close to the closing position, the locking piece locks the lever in the state of triggering the microswitch, and even if the cantilever rotates towards the closing position due to the springback of the contact, due to the locking effect of the locking piece on the lever, the signal of the auxiliary change-over switch cannot be reset.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an auxiliary self-locking structure and a circuit breaker. Background Art

[0002] The auxiliary transfer switch for the current frame circuit breaker needs to be linked with the main shaft of the operating mechanism, so that the auxiliary transfer switch state can be coordinated with the product opening and closing state to ensure that the auxiliary transfer switch can accurately indicate the switch state; however, since the opening and closing angle span of the main shaft of the frame circuit breaker operating mechanism is much larger than the angle required for the auxiliary transfer switch to achieve state conversion, the auxiliary transfer switch cannot normally indicate the opening position of the circuit breaker due to factors such as the main shaft rebound, resulting in incorrect indication. In addition, there are also problems such as high requirements for the matching dimensions between components, small adjustable range, and large space occupation. Utility Model Content

[0003] The utility model aims to overcome at least one defect of the prior art and provide an auxiliary self-locking structure and a circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The auxiliary self-locking structure includes a locking member that is movably arranged and an auxiliary conversion switch. The cantilever is installed on a main shaft for driving a moving contact and can be switched between a closing position and an opening position as the main shaft rotates. The auxiliary conversion switch includes a micro switch and a rotatably arranged lever. The cantilever is driven and matched with the lever and is linked with the locking member. The cantilever has a critical position between the closing position and the opening position and close to the closing position.

[0006] During the process of switching the cantilever from the closing position to the opening position, the cantilever drives the lever to rotate so that the lever triggers the microswitch to switch to the first switching state; the cantilever is separated from the locking piece when in the opening position, and the locking piece is locked with the lever; during the process of switching the cantilever from the opening position to the critical position, the locking piece remains locked with the lever; when the cantilever is in the critical position, it drives the locking piece to unlock the locking piece and the lever.

[0007] Optionally, it also includes a reset elastic member for resetting the locking member; during the process of the cantilever switching from the open position to the closed position, the cantilever drives the locking member to store energy in the reset elastic member; when the cantilever is in the open position, it separates from the locking member, causing the reset elastic member to release energy to drive the locking member to lock the lever.

[0008] Optionally, the lever is provided with a buckle portion for cooperating with the cantilever and the locking piece, and the locking piece is provided with a locking surface for lockingly cooperating with the buckle portion and a linkage surface for cooperating with the cantilever; in the process of the cantilever switching from the opening position to the critical position, the cantilever acts on the linkage surface of the locking piece to make the locking surface slide on the buckle portion; when the cantilever is at the critical position, it continues to drive the locking piece to separate the locking surface from the buckle portion.

[0009] Optionally, the axis of the cantilever is parallel to the axis of the lever, the cantilever and the locking element are stacked and spaced apart in a direction parallel to the axis of the cantilever, and the locking element is arranged on one side of a line connecting the axis of the cantilever and the axis of the lever.

[0010] Optionally, the locking piece extends in a direction close to a line connecting the axis of the cantilever and the axis of the lever to form a locking portion, and a side of the locking portion close to the line connecting the axis of the cantilever and the axis of the lever is the locking surface.

[0011] Optionally, the locking piece extends in a direction parallel to the axis of the cantilever to form a linkage portion, a side of the linkage portion facing the cantilever is the linkage surface, and the cantilever is located between the linkage portion and the buckle portion in a direction perpendicular to the axis of the cantilever.

[0012] Optionally, the locking portion has an unlocking surface connected to the locking surface, and the buckle portion is opposite to the unlocking surface after being separated from the locking surface. In the movement direction of the locking member during the process of the cantilever switching from the closing position to the opening position, the linkage surface, the locking surface, and the unlocking surface are arranged in sequence.

[0013] Optionally, the auxiliary switching switch also includes a bracket, the bracket is provided with an installation space, the lever and the micro switch are installed in the installation space, the lever is provided with a buckle portion extending out of the installation space, and the locking piece is installed on the outside of the bracket and arranged opposite to the buckle portion.

[0014] Optionally, one end of the lever is provided with a buckle portion for cooperating with the cantilever and the locking member, the middle portion of the lever is provided with a lever shaft for lever rotation, and the other end of the lever is provided with a trigger portion for cooperating with a micro switch trigger.

[0015] Optionally, the cantilever is driven and matched with the lever through a locking member, and the locking member is provided with a driven surface for driving and matching with the cantilever and a guide surface for linkage and matching with the buckle portion;

[0016] During the process of the cantilever switching from the closing position to the opening position, the cantilever acts on the actuated surface to drive the locking piece, and at the same time the guide surface abuts against the buckle part to drive the lever to rotate, so that the lever triggers the microswitch to switch to the first switching state; when the cantilever is in the opening position, it drives the locking piece to separate the guide surface from the buckle part, and the locking surface and the buckle part are locked and matched.

[0017] Optionally, the locking member is arranged to move linearly.

[0018] Optionally, the locking piece is a straight structure arranged along the moving direction of the locking piece, and a raised locking portion is provided on one edge of the locking piece, and the end face of the locking portion is a locking surface for cooperating with the lever locking, and the locking surface is parallel to the moving direction of the locking piece; a linkage portion is provided on the side of the locking piece facing the cantilever, which is formed by a protrusion in a vertical direction along the moving direction of the locking piece and is located on one side of the cantilever, and the side of the linkage portion facing the cantilever is a linkage surface for cooperating with the cantilever.

[0019] Optionally, the locking member is rotatably arranged.

[0020] Optionally, the locking piece is a fan-shaped structure centered on the axis of the locking piece, having an arcuate edge and two straight edges, the two straight edges extending outward at the connection between them to form a locking portion, the end face of the locking portion being a locking surface for cooperating with a lever lock, the locking surface being an arc surface concentric with the axis of the locking piece; one of the straight edges of the fan-shaped structure extends outward at the connection with the arcuate edge to form an extension portion, the extension portion is provided with a linkage portion on one side of the cantilever which is formed by a protrusion in a direction parallel to the axis of the locking piece, and the side of the linkage portion facing the cantilever is a linkage surface for cooperating with the cantilever.

[0021] Optionally, when the cantilever is in the closing position, the cantilever is separated from the lever and drives the locking member and the lever to be unlocked, and the micro switch is switched to the second switch state.

[0022] A circuit breaker, comprising the auxiliary self-locking structure described in any one of the above technical solutions.

[0023] The auxiliary self-locking structure and circuit breaker of the utility model are provided with a locking piece. The lever triggers the micro switch to switch the auxiliary conversion switch signal under the drive of the cantilever. The locking piece is unlocked with the lever under the linkage of the cantilever to reset the lever to realize the reset of the auxiliary conversion switch signal. When the cantilever is located between the opening position and the critical position close to the closing position, the locking piece locks the lever in the state of triggering the micro switch. Even if the cantilever rotates to the closing position due to the rebound of the contact, the auxiliary conversion switch signal will not be reset due to the locking effect of the locking piece on the lever, so as to normally indicate the opening state of the circuit breaker, and the cooperation is reliable and stable.

[0024] In addition, the reset elastic member is provided so that after the cantilever releases the restriction on the locking member, the locking member automatically locks the lever of the auxiliary switching switch under the action of the reset elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a partial structural schematic diagram of a circuit breaker in a closed state in Embodiment 1 of the utility model;

[0026] Figure 2 It is a partial structural schematic diagram of the circuit breaker in the open state of the first embodiment of the utility model;

[0027] Figure 3 It is a schematic diagram of the partial structure of the circuit breaker when the cantilever begins to drive the locking member and the lever to unlock in the first embodiment of the utility model;

[0028] Figure 4 This is a three-dimensional diagram of the auxiliary self-locking structure of the first embodiment of the utility model;

[0029] Figure 5 This is a view of the auxiliary self-locking structure of the first embodiment of the utility model;

[0030] Figure 6 This is a three-dimensional diagram of the auxiliary self-locking structure of the second embodiment of the utility model;

[0031] Figure 7 It is a partial structural schematic diagram of the circuit breaker in the closed state of the second embodiment of the utility model;

[0032] Figure 8 It is a partial structural schematic diagram of the circuit breaker in the open state of the second embodiment of the utility model;

[0033] Fig. 9 It is a schematic diagram of the partial structure of the circuit breaker when the cantilever of the second embodiment of the utility model starts to drive the locking member and the lever to unlock;

[0034] Fig.10 It is a partial structural schematic diagram of the circuit breaker in the closed state in the alternative solution of the locking member reset structure in the first embodiment of the utility model;

[0035] Fig.11 It is a schematic diagram of the partial structure of the circuit breaker when the cantilever begins to drive the locking member and the lever to lock in the alternative solution of the locking member reset structure in the first embodiment of the utility model;

[0036] Fig.12 It is a partial structural schematic diagram of the circuit breaker in the open state in the alternative solution of the locking member reset structure in the first embodiment of the utility model;

[0037] 1-locking member; 101-locking part; 101a-locking surface; 101b-unlocking surface; 101c-guiding surface; 102-linking part; 102a-linking surface; 103-locking member shaft; 104-sliding hole; 105-connecting hole; 106-actuated part; 106a-actuated surface; 2-auxiliary conversion switch; 201-micro switch; 201a-pressing plate; 201b-button; 202-lever; 202a-buckle part; 202b-trigger part; 202c-lever shaft; 203-mounting side plate; 203a-mounting shaft; 203b-fixed shaft; 3-reset elastic member; 4-operating mechanism; 401-cantilever; 401a-driving surface; 401b-actuating surface; 401c-pushing surface; 402-cantilever shaft; 5-base. DETAILED DESCRIPTION

[0038] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the auxiliary self-locking structure and circuit breaker of the utility model. The auxiliary self-locking structure and circuit breaker of the utility model are not limited to the description of the following embodiments.

[0039] like Figure 1 As shown, the circuit breaker of this embodiment includes a base 5, an operating mechanism 4 installed on the base 5, a contact system and an auxiliary self-locking structure. The operating mechanism 4 includes a main shaft and a cantilever 401 connected in linkage, and the contact system includes a matching moving contact and a static contact. The main shaft is rotatably arranged and connected to the moving contact, and is used to drive the moving contact and the static contact to open or close to realize the opening and closing of the circuit breaker. It should be noted that the structure and action principle of the operating mechanism 4 are prior art and will not be repeated here.

[0040] like Figure 1-Figure 5 or Figure 6-Figure 9As shown, the auxiliary self-locking structure of this embodiment includes a locking member 1 and an auxiliary switching switch 2, a cantilever 401 is installed on the main shaft, and can be switched between the closing position and the opening position with the rotation of the main shaft, and the auxiliary switching switch 2 includes a micro switch 201 and a lever 202 that is rotatable, and the cantilever 401 is driven and matched with the lever 202, and is linked with the locking member 1, and the cantilever 401 has a critical position between the closing position and the opening position and close to the closing position. In the process of switching the cantilever 401 from the closing position to the opening position, the cantilever 401 drives the lever 202 to rotate so that the lever 202 triggers the micro switch 201 to switch to the first switch state; the cantilever 401 is separated from the locking member 1 when in the opening position, and the locking member 1 is locked and matched with the lever 202. In the process of switching the cantilever 401 from the opening position to the closing position, the cantilever 401 is separated from the lever 202, and drives the locking member 1 and the lever 202 to unlock, so that the lever 202 is reset and the micro switch 201 is reset and switched to the second switch state, that is, when the cantilever 401 is in the closing position, the cantilever 401 is separated from the lever 202 and drives the locking member 1 and the lever 202 to unlock, and the micro switch 201 is switched to the second switch state. In particular, the locking member 1 remains locked with the lever 202 in the process of switching the cantilever 401 from the opening position to the critical position; when the cantilever 401 is in the critical position, it drives the locking member 1 to unlock the locking member 1 and the lever 202, so as to reliably indicate the opening state of the circuit breaker.

[0041] Specifically, during the switching process of the cantilever 401 from the opening position to the critical position, the cantilever 401 is separated from the lever 202, but the locking member 1 remains locked with the lever 202. If it is only caused by the rebound of the contact, it is only necessary for the contact rebound not to exceed the critical position, and the auxiliary transfer switch 2 stably outputs the opening state signal. If it is a normal closing operation, the cantilever 401 rotates from the opening position to the closing position with the main shaft. When the cantilever 401 is at the critical position, it drives the locking member 1 to unlock the locking member 1 and the lever 202, so that the lever 202 is reset and the micro switch 201 is reset to the second switch state, and then the cantilever 401 rotates to the closing position with the main shaft.

[0042] The auxiliary self-locking structure and circuit breaker of this embodiment are provided with a locking member 1. The lever 202 triggers the micro switch 201 to switch the auxiliary transfer switch 2 signal under the drive of the cantilever 401. The locking member 1 is unlocked with the lever 202 under the linkage of the cantilever 401 to reset the lever 202 to achieve the reset of the auxiliary transfer switch 2 signal. When the cantilever 401 is located between the opening position and the critical position close to the closing position, the locking member 1 locks the lever 202 in the state of triggering the micro switch 201. Even if the cantilever 401 rotates to the closing position due to the rebound of the contact, the auxiliary transfer switch 2 signal will not be reset due to the locking effect of the locking member 1 on the lever 202, thereby normally indicating the opening state of the circuit breaker, and the cooperation is reliable and stable.

[0043] It should be noted that the critical position close to the closing position means that the distance from the critical position to the closing position is less than the distance from the critical position to the opening position. The first switch state of the triggering micro switch 201 may refer to the micro switch being closed to output a signal, or the micro switch being disconnected to output a signal, and the corresponding second switch state is a switch device different from the first switch state, which may refer to the micro switch being disconnected to output a signal, or the micro switch being closed to output a signal; the micro switch may be a normally open micro switch or a normally closed micro switch as required, or a micro switch including multiple groups of normally open contacts and / or normally closed contacts. The micro switch 201 is a prior art, and usually includes a pressure plate 201a and a button 201b. The micro switch 201 has a reset structure, so that the button 201b can be automatically reset when it is released. In this embodiment, when the button 201b is pressed by the lever 202, the signal of the micro switch 201 is converted, and the auxiliary conversion switch 2 outputs an opening state signal; when the button 201b is released by the lever 202, the button 201b will automatically reset and enter the pop-up state, and the auxiliary conversion switch 2 outputs a closing state signal. It is worth noting that in this embodiment, the micro switch 201 includes a pressure plate 201a structure to increase the rotation stroke of the lever 202, and a micro switch 201 without a pressure plate 201a structure can also be selected. After the locking member 1 releases the lock on the lever 202, the reset of the lever 202 can be driven by the reset of the button 201b, or the lever 202 can be reset due to gravity. A lever reset spring can also be provided to drive the lever 202 to reset.

[0044] Further, an implementation scheme of the reset structure of the locking member 1, the auxiliary self-locking structure of this implementation also includes a reset elastic member 3 for resetting the locking member 1; in the process of the cantilever 401 switching from the open position to the closed position, the cantilever 401 drives the locking member 1 to store energy in the reset elastic member 3; the cantilever 401 is separated from the locking member 1 in the open position, so that the reset elastic member 3 releases energy to drive the locking member 1 to lock the lever 202. The reset elastic member 3 is set so that after the cantilever 401 releases the restriction on the locking member 1, the locking member 1 automatically locks the lever 202 of the auxiliary transfer switch 2 under the action of the reset elastic member 3.

[0045] like Figure 1-Figure 5 Embodiment 1 or Figure 6-Figure 9The cooperation structure among the cantilever 401, the locking member 1 and the lever 202 shown in the second embodiment, the lever 202 is provided with a buckle portion 202a for cooperating with the cantilever 401 and the locking member 1, and the locking member 1 is provided with a locking surface 101a for locking and cooperating with the buckle portion 202a and a linkage surface 102a for cooperating with the cantilever 401; in the process of the cantilever 401 switching from the opening position to the critical position, the cantilever 401 acts on the linkage surface 102a of the locking member 1 to make the locking surface 101a slide on the buckle portion 202a; when the cantilever 401 is at the critical position, it continues to drive the locking member 1 to separate the locking surface 101a from the buckle portion 202a, so that the locking member 1 and the lever 202 are unlocked.

[0046] Specifically, the axis of the cantilever 401 (the center line of the cantilever rotating shaft 402 of the main shaft) is parallel to the axis of the lever 202, and the cantilever 401 and the locking member 1 are stacked and spaced apart in a direction parallel to the axis of the cantilever 401, and the locking member 1 is arranged on one side of the line between the axis of the cantilever 401 and the axis of the lever 202, and the locking member 1 extends in a direction close to the line between the axis of the cantilever 401 and the axis of the lever 202 to form a locking portion 101, and the side of the locking portion 101 close to the line between the axis of the cantilever 401 and the axis of the lever 202 is the locking surface 101a. The locking member 1 extends in a direction parallel to the axis of the cantilever 401 to form a linkage portion 102, and the side of the linkage portion 102 facing the cantilever 401 is the linkage surface 102a. In the direction perpendicular to the axis of the cantilever 401, the cantilever 401 is located between the linkage portion 102 and the buckle portion 202a. One side of the cantilever 401 is provided with a driving surface 401a for linkage with the buckle portion 202a, and the other side of the cantilever 401 is provided with an action surface 401b for linkage with the linkage surface 102a. Preferably, the driving surface 401a is an arc-shaped convex surface.

[0047] Furthermore, the locking portion 101 has an unlocking surface 101b connected to the locking surface 101a, and the buckle portion 202a is separated from the locking surface 101a and is opposite to the unlocking surface 101b. In the process of the cantilever 401 switching from the closing position to the opening position, the linkage surface 102a, the locking surface 101a, and the unlocking surface 101b are arranged in sequence in the direction of movement of the locking member 1. The relative position of the linkage surface 102a and the locking surface 101a can be adjusted as needed to realize self-adjustment so that the angle that the cantilever 401 needs to rotate to convert the auxiliary switching switch 2 from the opening signal to the closing signal can be converted.

[0048] like Figure 4-Figure 5 or Figure 6As shown, the auxiliary conversion switch 2 of this embodiment also includes a bracket, the bracket is provided with an installation space, the lever 202 and the micro switch 201 are installed in the installation space, the lever 202 is provided with the buckle portion 202a extending out of the installation space, and the locking member 1 is installed on the outside of the bracket and arranged opposite to the buckle portion 202a. Specifically, the bracket includes two installation side plates 203, and the two installation side plates 203 are spaced to form the installation space. The locking member 1 is designed to be externally mounted, occupies little space, and will not interfere with other internal components. Of course, as other embodiments, the locking member 1 can also be arranged on the inner side of the bracket of the auxiliary conversion switch 2.

[0049] like Figure 4-Figure 5 or Figure 6 As shown, the structure of the lever 202 in this embodiment, the buckle portion 202a is provided at one end of the lever 202, the lever shaft 202c for the lever 202 to be rotatably set is provided in the middle of the lever 202, the lever shaft 202c is rotatably mounted between the two mounting side plates 203, the axis of the lever 202 refers to the center line of the lever shaft 202c, and the other end of the lever 202 is provided with a trigger portion 202b for triggering and cooperating with the micro switch 201. The trigger portion 202b of the lever 202 for triggering the micro switch 201 and the buckle portion 202a for cooperating with the locking member 1 and the cantilever 401 are arranged on both sides of the axis of the lever 202, so as to facilitate the orderly arrangement of the micro switch 201, the locking member 1 and the cantilever 401.

[0050] The reset structure of the locking member 1 may be alternatively configured as Figure 10-12 As shown, in this embodiment, the reset elastic member 3 is not provided, the cantilever 401 is driven and matched with the lever 202 through the locking member 1, the locking member 1 is provided with a driven surface 106a for driving and matching with the cantilever 401 and a guide surface 101c for linkage and matching with the buckle portion 202a, the cantilever 401 is provided with a pushing surface 401c for driving and matching with the driven surface 106a, and the pushing surface 401c is connected between the driving surface 401a and the action surface 401b. Fig.11 As shown, during the switching process of the cantilever 401 from the closing position to the opening position, the pushing surface 401c of the cantilever 401 acts on the driven surface 106a to drive the locking member 1 to translate along the arrow direction, and at the same time, the guide surface 101c abuts against the buckle portion 202a to drive the lever 202 to rotate, so that the lever 202 triggers the micro switch 201 to switch to the first switch state; Fig.12 As shown, when the cantilever 401 is in the opening position, it drives the locking member 1 to separate the guide surface 101c from the buckle portion 202a, and the locking surface 101a is locked and matched with the buckle portion 202a.

[0051] like Figure 1-Figure 5As shown, the first embodiment of the movement mode of the locking member 1, the locking member 1 is arranged to move in a straight line, and the moving direction of the locking member 1 is perpendicular to the axis of the cantilever 401. In this embodiment, the locking member 1 is a straight structure arranged along the moving direction of the locking member 1, and a protruding locking portion 101 is arranged on one edge of the locking member 1, and the end surface of the locking portion 101 is a locking surface 101a for locking and cooperating with the lever 202, and the locking surface 101a is parallel to the moving direction of the locking member 1; the locking member 1 is provided with a linkage portion 102 on one side of the cantilever 401, which is formed by protruding in a vertical direction along the moving direction of the locking member 1, and the side of the linkage portion 102 facing the cantilever 401 is a linkage surface 102a for linkage cooperation with the cantilever 401. The side of the locking portion 101 facing away from the linkage portion 102 is an unlocking surface 101b. Specifically, a mounting shaft 203a is provided on the outer side of the mounting side plate 203 of the bracket, and a sliding hole 104 is provided on the locking member 1 to slide with the mounting shaft 203a. The sliding hole 104 is preferably a waist-shaped hole, and the mounting shaft 203a is slidably inserted in the sliding hole 104 to realize the linear movement of the locking member 1. Figure 5 As shown, the reset structure of the locking member 1 adopts a reset elastic member 3, one end of the reset elastic member 3 is hung in the connecting hole 105 of the locking member 1, and the other end of the reset elastic member 3 is hung on the mounting shaft 203a. Figure 10-12 As shown, the reset structure of the locking member 1 adopts an alternative solution without the reset elastic member 3. The unlocking surface 101b of the locking portion 101 is provided with a guide surface 101c at one end connected to the locking surface 101a. The included angle between the guide surface 101c and the locking surface 101a is an obtuse angle. The other end of the unlocking surface 101b of the locking portion 101 extends in a direction perpendicular to the moving direction of the locking member 1 to form a passive portion 106. The side of the passive portion 106 facing the linkage portion 102 is the passive surface 106a. Fig.11 As shown, during the switching of the cantilever 401 from the closing position to the opening position, the guide surface 101c cooperates with the arc surface at the end of the buckle portion 202a to drive the lever 202 to rotate counterclockwise, so that the lever 202 triggers the micro switch 201 to switch to the first switch state.

[0052] The action principle of the auxiliary self-locking structure in this embodiment is to take the reset structure of the locking member 1 using the reset elastic member 3 as an example. Figure 1 The figure shows a schematic diagram of the circuit breaker closing state, in which the cantilever 401 is in the closing position, and the action surface 401b of the cantilever 401 limits the linkage part 102 of the locking member 1, so that the locking part 101 is separated from the buckle part 202a, so that the lever 202 is in a free state, the button 201b is in a pop-up state, and the auxiliary conversion switch 2 outputs a closing state signal, that is, the micro switch 201 is switched to the second switch state.

[0053] like Figure 2 The figure shows a schematic diagram of the circuit breaker opening state, at which the cantilever 401 rotates clockwise from the closing position to the opening position, and pushes the buckle part 202a to drive the lever 202 to rotate in the direction of the arrow in the figure, that is, counterclockwise, so that the trigger part 202b pushes the pressure plate 201a, so that the pressure plate 201a presses the button 201b, and at this time, the micro switch 201 undergoes signal conversion, and the auxiliary conversion switch 2 outputs an opening state signal, that is, the micro switch 201 switches to the first switch state; because the cantilever 401 loses its limiting effect on the linkage part 102 after rotating to the opening position, the locking member 1 slides upward under the action of the reset elastic member 3 to make the locking part 101 slide to the side of the buckle part 202a, and the locking surface 101a locks the buckle part 202a to limit.

[0054] When the cantilever 401 rotates slightly toward the closing position due to the rebound of the contact, that is, when the cantilever 401 switches from the opening position to the critical position, as shown in FIG. Figure 3 As shown, due to the locking and limiting effect of the locking surface 101a on the buckle portion 202a, the micro switch 201 is stably in the state where the button 201b is pressed, and the auxiliary conversion switch 2 always outputs the opening state signal. As long as the contact rebound does not exceed the critical position, the auxiliary conversion switch 2 can stably output the opening state signal.

[0055] When the main shaft drives the moving contact to perform a normal closing operation, the cantilever 401 rotates with the main shaft from the opening position to the closing position. In the process of the cantilever 401 rotating counterclockwise from the opening position to the closing position, when the cantilever 401 rotates a certain angle close to the closing position, the cantilever 401 pushes the linkage part 102, thereby driving the locking member 1 to move downward. When the cantilever 401 rotates counterclockwise to the closing position, the cantilever 401 pushes the linkage part 102 to move downward. Figure 3 When the cantilever 401 is in the critical position shown in FIG. 1 , the locking surface 101a is disengaged from the buckle portion 202a, thereby releasing the lever 202. The lever 202 rotates clockwise to reset, the button 201b pops out, the micro switch 201 signal is converted, and the auxiliary switch 2 outputs a closing state signal, that is, the micro switch 201 switches to the second switch state, and the cantilever 401 rotates with the main shaft to the closing position, and the circuit breaker enters the state as shown in FIG. Figure 1 In this embodiment, by adjusting the distance D between the unlocking surface 101b and the linkage surface 102a of the locking member 1, the angle that the cantilever 401 needs to rotate to convert the auxiliary switch 2 from an opening signal to a closing signal can be adjusted.

[0056] like Figure 6-Figure 9As shown, the second embodiment of the movement mode of the locking member 1, the locking member 1 is arranged to rotate, and the axis of the locking member 1 is parallel to the axis of the cantilever 401. In this embodiment, the locking member 1 is a fan-shaped structure centered on the axis of the locking member 1, with an arc edge and two straight edges, the connection of the two straight edges extends outward to form a locking portion 101, the end face of the locking portion 101 is a locking surface 101a for locking and cooperating with the lever 202, and the locking surface 101a is an arc surface concentric with the axis of the locking member 1; one of the straight edges of the fan-shaped structure extends outward at the connection with the arc edge to form an extension portion, and the extension portion is provided with a linkage portion 102 on one side of the cantilever 401, which is formed by protruding in a direction parallel to the axis of the locking member 1, and the side of the linkage portion 102 facing the cantilever 401 is a linkage surface 102a for linkage cooperation with the cantilever 401. The side of the locking part 101 facing away from the linkage part 102 is an unlocking surface 101b. Specifically, the locking member 1 is provided with a locking member rotating shaft 103, which is rotatably inserted into the rotating mounting hole on the mounting side plate 203 of the bracket to realize the rotational setting of the locking member 1. In this embodiment, one end of the reset elastic member 3 is hung in the connecting hole 105 of the locking member 1, and the other end of the reset elastic member 3 is hung on the fixed shaft 203b outside the mounting side plate 203. In this embodiment, the reset structure of the locking member 1 adopts the reset elastic member 3, and of course, an alternative solution without the reset elastic member 3 can also be adopted.

[0057] The working principle of the auxiliary self-locking structure in this embodiment is as follows: Figure 7 The figure shows a schematic diagram of the circuit breaker closing state, in which the cantilever 401 is in the closing position, and the action surface 401b of the cantilever 401 limits the linkage part 102 of the locking member 1, so that the locking part 101 is separated from the buckle part 202a, so that the lever 202 is in a free state, the button 201b is in a pop-up state, and the auxiliary conversion switch 2 outputs a closing state signal, that is, the micro switch 201 is switched to the second switch state.

[0058] like Figure 8The figure shows a schematic diagram of the circuit breaker opening state, at which the cantilever 401 rotates clockwise from the closing position to the opening position, and pushes the buckle part 202a to drive the lever 202 to rotate in the direction of the arrow in the figure, that is, counterclockwise, so that the trigger part 202b pushes the pressure plate 201a, so that the pressure plate 201a presses the button 201b, and at this time, the micro switch 201 undergoes signal conversion, and the auxiliary conversion switch 2 outputs an opening state signal, that is, the micro switch 201 switches to the first switch state; since the cantilever 401 loses its limiting effect on the linkage part 102 after rotating to the opening position, the locking member 1 rotates in the direction of the arrow in the figure, that is, counterclockwise, under the action of the reset elastic member 3, so that the locking part 101 slides to the side of the buckle part 202a, and the locking surface 101a locks the buckle part 202a to limit. Since the locking surface 101a is an arc surface concentric with the locking member shaft 103, the thrust of the buckle portion 202a on the locking surface 101a is perpendicular to the locking member shaft 103, so that the lever 202 cannot drive the locking member 1 to rotate, thereby realizing the locking and limiting function of the locking member 1 on the lever 202.

[0059] When the cantilever 401 rotates slightly toward the closing position due to the rebound of the contact, that is, when the cantilever 401 switches from the opening position to the critical position, as shown in FIG. Fig. 9 As shown, since the locking surface 101a has not separated from the buckle portion 202a, the locking limit function still exists, so that the micro switch 201 is stably in the state where the button 201b is pressed down, and the auxiliary conversion switch 2 always outputs the opening state signal. As long as the contact rebound does not exceed the critical position, the auxiliary conversion switch 2 can stably output the opening state signal.

[0060] When the main shaft drives the moving contact to perform a normal closing operation, the cantilever 401 rotates with the main shaft from the opening position to the closing position. In the process of the cantilever 401 rotating counterclockwise from the opening position to the closing position, when the cantilever 401 rotates a certain angle close to the closing position, the cantilever 401 pushes the linkage part 102, thereby driving the locking member 1 to rotate clockwise. When the cantilever 401 rotates counterclockwise to the closing position, the cantilever 401 pushes the linkage part 102 to drive the locking member 1 to rotate clockwise. Figure 3 When the lock surface 101a is in the critical position shown in FIG. 1 , the lock surface 101a is disengaged from the buckle portion 202a, thereby releasing the lever 202. The lever 202 rotates clockwise to reset, the button 201b pops out, the micro switch 201 signal is converted, the auxiliary transfer switch 2 outputs a closing state signal, and the circuit breaker enters the state as shown in FIG. Figure 7 In this embodiment, by adjusting the angle Φ between the unlocking surface 101b and the linkage surface 102a of the locking member 1, the angle that the cantilever 401 needs to rotate to convert the auxiliary switch 2 from an opening signal to a closing signal can be adjusted.

[0061] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0062] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An auxiliary self-locking structure, comprising a locking member (1) arranged to move, and an auxiliary transfer switch (2), wherein a cantilever (401) is mounted on a main shaft for driving a moving contact, and can be switched between a closing position and an opening position with the rotation of the main shaft, wherein the auxiliary transfer switch (2) comprises a micro switch (201) and a rotatable lever (202), characterized in that: The cantilever (401) is driven to cooperate with the lever (202) and is linked to cooperate with the locking member (1); the cantilever (401) has a critical position located between the closing position and the opening position and close to the closing position; During the process of the cantilever (401) switching from the closing position to the opening position, the cantilever (401) drives the lever (202) to rotate so that the lever (202) triggers the micro switch (201) to switch to the first switch state; when the cantilever (401) is in the opening position, it is separated from the locking member (1), and the locking member (1) and the lever (202) are locked together; during the process of the cantilever (401) switching from the opening position to the critical position, the locking member (1) remains locked together with the lever (202); when the cantilever (401) is in the critical position, it drives the locking member (1) so that the locking member (1) and the lever (202) are unlocked.

2. The auxiliary self-locking structure according to claim 1, characterized in that: It also includes a resetting elastic member (3) for resetting the locking member (1); during the process of the cantilever (401) switching from the open position to the closed position, the cantilever (401) drives the locking member (1) to store energy in the resetting elastic member (3); when the cantilever (401) is in the open position, it separates from the locking member (1), causing the resetting elastic member (3) to release energy to drive the locking member (1) to lock the lever (202).

3. The auxiliary self-locking structure according to claim 1, characterized in that: The lever (202) is provided with a buckle portion (202a) for cooperating with the cantilever (401) and the locking member (1); the locking member (1) is provided with a locking surface (101a) for lockingly cooperating with the buckle portion (202a) and a linkage surface (102a) for cooperating with the cantilever (401); during the process of the cantilever (401) switching from the opening position to the critical position, the cantilever (401) acts on the linkage surface (102a) of the locking member (1) to make the locking surface (101a) slide on the buckle portion (202a); when the cantilever (401) is at the critical position, it continues to drive the locking member (1) to separate the locking surface (101a) from the buckle portion (202a).

4. The auxiliary self-locking structure according to claim 3, characterized in that: The axis of the cantilever (401) is parallel to the axis of the lever (202), and the cantilever (401) and the locking member (1) are stacked and spaced apart in a direction parallel to the axis of the cantilever (401), and the locking member (1) is arranged on one side of the line connecting the axis of the cantilever (401) and the axis of the lever (202).

5. The auxiliary self-locking structure according to claim 4, characterized in that: The locking member (1) extends in a direction close to the line between the axis of the cantilever (401) and the axis of the lever (202) to form a locking portion (101), and the side of the locking portion (101) close to the line between the axis of the cantilever (401) and the axis of the lever (202) is the locking surface (101a).

6. The auxiliary self-locking structure according to claim 4, characterized in that: The locking member (1) extends in a direction parallel to the axis of the cantilever (401) to form a linkage portion (102); the side of the linkage portion (102) facing the cantilever (401) is the linkage surface (102a); and in a direction perpendicular to the axis of the cantilever (401), the cantilever (401) is located between the linkage portion (102) and the buckle portion (202a).

7. The auxiliary self-locking structure according to claim 5, characterized in that: The locking portion (101) has an unlocking surface (101b) connected to the locking surface (101a); the buckle portion (202a) is opposite to the unlocking surface (101b) after being separated from the locking surface (101a); and in the movement direction of the locking member (1) during the process of the cantilever (401) switching from the closing position to the opening position, the linkage surface (102a), the locking surface (101a), and the unlocking surface (101b) are arranged in sequence.

8. The auxiliary self-locking structure according to claim 1, characterized in that: The auxiliary switch (2) further comprises a bracket, the bracket being provided with an installation space, the lever (202) and the micro switch (201) being installed in the installation space, the lever (202) being provided with a buckle portion (202a) extending out of the installation space, and the locking member (1) being installed on the outer side of the bracket and arranged opposite to the buckle portion (202a).

9. The auxiliary self-locking structure according to claim 1, characterized in that: One end of the lever (202) is provided with a buckle portion (202a) for cooperating with the cantilever (401) and the locking member (1), the middle portion of the lever (202) is provided with a lever shaft (202c) for rotating the lever (202), and the other end of the lever (202) is provided with a trigger portion (202b) for cooperating with the micro switch (201) for triggering.

10. The auxiliary self-locking structure according to claim 3, characterized in that: The cantilever (401) is driven to cooperate with the lever (202) through a locking member (1), and the locking member (1) is provided with a driven surface (106a) for driving cooperation with the cantilever (401) and a guide surface (101c) for linkage cooperation with the buckle portion (202a); During the process of the cantilever (401) switching from the closing position to the opening position, the cantilever (401) acts on the driven surface (106a) to drive the locking member (1), and at the same time the guide surface (101c) abuts against the buckle portion (202a) to drive the lever (202) to rotate, so that the lever (202) triggers the micro switch (201) to switch to the first switch state; when the cantilever (401) is in the opening position, it drives the locking member (1), so that the guide surface (101c) is separated from the buckle portion (202a), and the locking surface (101a) and the buckle portion (202a) are locked and matched.

11. The auxiliary self-locking structure according to any one of claims 1 to 10, characterized in that: The locking member (1) is arranged to move linearly.

12. The auxiliary self-locking structure according to claim 11, characterized in that: The locking member (1) is a straight structure arranged along the moving direction of the locking member (1); a protruding locking portion (101) is arranged on one edge of the locking member (1); the end surface of the locking portion (101) is a locking surface (101a) for locking with the lever (202); the locking surface (101a) is parallel to the moving direction of the locking member (1); a linkage portion (102) is arranged on one side of the cantilever (401) and is formed by protruding in a direction perpendicular to the moving direction of the locking member (1); the side of the linkage portion (102) facing the cantilever (401) is a linkage surface (102a) for linkage with the cantilever (401).

13. The auxiliary self-locking structure according to any one of claims 1 to 10, characterized in that: The locking member (1) is rotatably arranged.

14. The auxiliary self-locking structure according to claim 13, characterized in that: The locking member (1) is a fan-shaped structure with the axis of the locking member (1) as the center, and has an arc-shaped edge and two straight edges. The connection between the two straight edges extends outward to form a locking portion (101). The end face of the locking portion (101) is a locking surface (101a) for locking with the lever (202). The locking surface (101a) is an arc surface concentric with the axis of the locking member (1). One of the straight edges of the fan-shaped structure extends outward at the connection with the arc-shaped edge to form an extension portion. The extension portion is provided with a linkage portion (102) on one side of the cantilever (401) and is formed by protruding in a direction parallel to the axis of the locking member (1). The side of the linkage portion (102) facing the cantilever (401) is a linkage surface (102a) for linkage with the cantilever (401).

15. The auxiliary self-locking structure according to claim 1, characterized in that: When the cantilever (401) is in the closing position, the cantilever (401) is separated from the lever (202) and drives the locking member (1) and the lever (202) to be unlocked, and the micro switch (201) is switched to the second switch state.

16. A circuit breaker, characterized in that: It comprises the auxiliary self-locking structure described in any one of claims 1-15.

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