Double-lock plug-in circuit breaker that can prevent closing and plugging

Abstract

A double-lock plug-in circuit breaker capable of preventing closing and plugging and unplugging comprises a button mechanism, a transmission disk and an operating mechanism, and further comprises a first locking piece having a first lock and a second locking piece having a second lock. A reset spring drives the first lock and the second lock to extend to their extended positions simultaneously in the closing state and the opening state; in the closing state, the transmission disk locks the second locking piece to prevent the first lock and the second lock from retreating to the retracted position; in the opening state, when the second lock is retracted to the retracted position by an external force, the second locking piece locks the transmission disk to prevent the transmission disk from rotating in the closing direction; the button mechanism can also drive the circuit breaker to switch to an unlocked state, that is, the button mechanism drives the first locking piece, and then the first locking piece drives the first lock and drives the second lock to retreat to the retracted position simultaneously, switching to an unlocked state, thereby improving the ability to resist brute force plugging and unplugging.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage terminal electrical appliances, in particular to a plug-in circuit breaker capable of reliably preventing a switch from being inserted or pulled out. Background Art

[0002] With the rapid development of network communication technology, especially the popularization of 5G network, the requirements for circuit breakers to effectively improve the safety of electrical equipment are getting higher and higher. The traditional power supply method of connecting many sockets and plug boards with one terminal circuit breaker is far from meeting the requirements of safe power use and equipment protection. For example, the terminal circuit breaker used in 5G communication equipment not only needs to be upgraded and improved in many aspects such as miniaturization, intelligence, reliability, stability, etc., but also needs to expand more matching new structures in terms of use requirements, such as requiring the circuit breaker to be easy to plug and unplug like a plug and be locked in the installation position. This new type of circuit breaker is called a plug-in circuit breaker. It can not only provide various safety protection performances of the circuit breaker for power lines and electrical equipment, but also meet the needs of different electrical equipment for power quality, and enable the circuit breaker to be conveniently installed / removed in the circuit by plugging and unplugging. For this reason, the structure of the plug-in circuit breaker has now developed into various types, but under the trend of miniaturization of electrical equipment, the overall structure, operation mode and safe use of the matching circuit breaker are still in urgent need of further improvement, optimization and upgrading.

[0003] Existing plug-in circuit breakers only have the function of preventing the circuit breaker from being pulled out in the closed state, but cannot effectively prevent brute force plugging and unplugging, and do not have the function of preventing the circuit breaker from being inserted in the closed state, nor do they have the function of preventing the circuit breaker from being accidentally closed during the plugging and unplugging process. Such existing plug-in small circuit breakers generally require the use of three parts: a lock button, a fastener, and a release member to achieve the function of preventing the circuit breaker from being pulled out after closing. Since the fastener adopts a diagonal support structure, its mechanical structure is unreasonable, which can easily lead to abnormal deformation and / or displacement of the force-bearing device, especially when brute force plugging and unplugging, it is easy for the locking boss to slip off the cabinet and become unable to lock. In addition, due to the unreasonable overall structural scheme, it is impossible to adopt a structure to prevent the locking boss from accidentally retracting in the closed state, and it is also difficult to adopt a structure to prevent the circuit breaker from accidentally closing during the plugging and unplugging process. Existing plug-in circuit breakers still have structural problems such as complex structure and large number of parts, which means that the performance levels of existing plug-in circuit breakers such as safety and reliability need to be improved. In terms of miniaturization, easy operation and other usage functions, structural constraints on manufacturing costs, and automated large-scale production, they are far from meeting market needs. Summary of the invention

[0004] The object of the present invention is to overcome the existing technical defects of the existing plug-in circuit breaker, such as the inability to prevent insertion in the closed state, the inability to prevent closing during the plugging and unplugging process, and the inability to resist brute force plugging and unplugging, and to provide a double-lock plug-in circuit breaker that can prevent closing and plugging, can prevent closing during the plugging and unplugging process, and can effectively resist brute force plugging and unplugging.

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

[0006] A double-lock plug-in circuit breaker capable of preventing closing and plugging, comprising a circuit breaker housing, a button mechanism, a transmission disc and an operating mechanism, wherein the transmission disc is rotatably mounted in the housing, the button mechanism is linked with the operating mechanism through the transmission disc, and can control the circuit breaker to switch between a closing state and an opening state, and further comprising a first locking member having a first lock, a second locking member having a second lock and a reset spring, wherein both the first lock and the second lock have an extended position extending out of the housing and a retracted position retracted into the housing, and the reset spring drives the first lock and the second lock to move in the closing state and the opening state. The two locks extend to their extended positions at the same time; in the closed state, the transmission disk locks the second locking piece to prevent the first lock and the second lock from retreating to the retracted position; in the open state, when the second lock is retracted to the retracted position by the retracting external force, the second locking piece locks the transmission disk to prevent the transmission disk from rotating in the closing direction; after opening, the button mechanism can also drive the circuit breaker to switch to the unlocked state, that is, the button mechanism drives the first locking piece, and then the first locking piece drives the first lock and drives the second lock to retreat to the retracted position at the same time, and switch to the unlocked state.

[0007] Preferably, it includes a second locking portion arranged on the first locking member, and a second stop portion arranged on the button mechanism; the second stop portion and the second locking portion abut against each other in the closed state, and are separated from each other in the open and unlocked states.

[0008] Preferably, it includes a first linkage abutment portion arranged on the first locking member and a second linkage abutment portion arranged on the second locking member, the first linkage abutment portion abuts and cooperates with the second linkage abutment portion, and the two ends of the reset spring are respectively connected to the second locking member and the shell; the second locking member drives the first locking member under the elastic force of the reset spring, so that the first lock head and the second lock head are in the extended position; when the first locking member is subjected to an external force that can overcome the elastic force of the reset spring, the second locking member, driven by the first locking member, causes the first lock head and the second lock head to retreat to the retracted position.

[0009] Preferably, it includes an unlocking drive part arranged on the button mechanism, an unlocking activated part and a first linkage abutment part arranged on the first locking member, and a second linkage abutment part arranged on the second locking member; the unlocking operation of the button mechanism causes the unlocking drive part to drive the unlocking activated part, the unlocking activated part then drives the first linkage abutment part, the first linkage abutment part drives the second linkage abutment part, and the second linkage abutment part drives the second locking member to retreat to its retracted position.

[0010] Preferably, it includes a first locking portion arranged on the second locking member and a first stop portion correspondingly arranged on the transmission disk; when the transmission disk rotates to the closing position, the first stop portion rotates with the transmission disk to a position facing the first locking portion of the second locking member, and the first stop portion blocks the first locking portion so that the second locking member cannot retreat to the retracted position.

[0011] Preferably, it includes a first locking portion arranged on the second locking member and a corresponding anti-rotation portion arranged on the transmission disc; when the transmission disc rotates to the opening position, the anti-rotation portion rotates with the transmission disc to a position facing the first locking portion; and when the second locking member retreats to the retracted position, the first locking portion blocks the first anti-retraction portion so that the transmission disc cannot rotate in the closing direction.

[0012] Preferably, the first locking member is provided with a first lock head, an unlocking actuated portion, a first linkage abutment portion and a first rotating pair; the first locking member is installed in the housing through the first rotating pair, the unlocking actuated portion and the first lock head are respectively located at two ends of the first locking member, and the first lock head and the first linkage abutment portion are located on both sides of one end of the first locking member; the unlocking actuated portion cooperates with the button mechanism to drive the first locking member to unlock and rotate; the first linkage abutment portion abuts and cooperates with the second linkage abutment portion of the second locking member to link the first lock head with the second lock head.

[0013] Preferably, the second locking piece is provided with a second lock head, a first locking portion and a second linkage abutment portion; the second locking piece is installed in the shell for linear movement, and the direction of linear movement is perpendicular to the plugging and unplugging direction of the circuit breaker, the second lock head and the first locking portion are respectively located at two ends of the second locking piece, the first locking portion is located on the side close to the inside of the shell, the second linkage abutment portion is located on one side of the second lock head, the first locking portion is blocked and matched with the transmission disk, and the second linkage abutment portion is abutted and matched with the first linkage abutment portion of the first locking piece.

[0014] Preferably, the extension / retraction movement of the first lock head of the first locking member is a swing around the rotation center of its first rotating pair, and the tangent of the movement trajectory of the swing at the extended position is perpendicular to the plugging and unplugging direction of the circuit breaker; the first rotating pair is located on the side of the first lock head facing the cabinet opening end B, so that the first rotating pair can become a hook-type fulcrum of the first lock head when the switch is closed and pulled out.

[0015] Preferably, the second locking member is installed in the shell through a linear moving pair, and the linear moving pair is a slide slot and slider type linear moving pair, which includes a guide slot arranged on the shell and a sliding block arranged on the second locking member; or, the linear moving pair is a cylindrical linear moving pair, which includes a guide hole arranged on the shell and a sliding column structure arranged on the second locking member.

[0016] Preferably, the button mechanism includes a button member, and the unlocking drive part is arranged on the button member; during the movement of the button member between the closing position and the opening position, the unlocking drive part and the unlocking driven part of the first locking member are released from the driving relationship, so that the first locking member is not restricted by the lock drive part a; during the movement of the button member from the opening position to the unlocking position, the unlocking drive part drives the unlocking driven part and causes the first locking member to unlock and rotate.

[0017] Preferably, the button mechanism includes a button member and an indicator member arranged in the button member for indicating the closing / opening state of the circuit breaker, and the unlocking drive portion is arranged on the indicator member; when the button mechanism moves from the opening position to the unlocking position, the unlocking drive portion on the indicator member drives the unlocking driven portion and causes the first locking member to unlock and rotate.

[0018] Preferably, the indicator member comprises a rotating shaft a, a display end surface b and an unlocking drive portion arranged at one end of the rotating shaft a, the display end surface b is provided with an indicating portion used as an opening and closing mark, the button member is provided with a cavity-type mounting hole inside, and an observation window which is intersecting with the mounting hole is provided on the operating end surface of the button member. The indicator member is installed in the mounting hole of the button member through the rotating shaft a and can swing around the axis, and the swing drives the indicating portion on the display end surface b to move under the observation window, and the corresponding opening and closing state is displayed by the indicating portion moved into the observation window; the unlocking drive portion is also provided with an opening indication driving surface and a closing indication driving surface arranged at intervals, and the unlocking drive portion of the first locking member is provided with an opening indication driving surface and a closing indication driving surface. The lock actuated portion extends between the opening indication driving surface and the closing indication driving surface; when the button mechanism is pressed for closing operation, the closing indication driving surface contacts and cooperates with the unlocking actuated portion to move the indicator to the closing position and maintain it in the closing indication state; when the button mechanism is pulled for opening operation, the opening indication driving surface contacts and cooperates with the unlocking actuated portion to move the indicator to the opening position and maintain it in the opening indication state; after opening, the button mechanism is continued to be pulled, and the opening indication driving surface drives the unlocking actuated portion to unlock and rotate the first locking member, and the first locking member drives the first locking head and the second locking head to retreat to the retracted position at the same time, and switch to the unlocking state.

[0019] The double-lock plug-in circuit breaker capable of preventing closing and plugging of the present invention adopts two locks, namely a first lock and a second lock, which can not only automatically prohibit the circuit breaker from being inserted into the cabinet B, but also automatically prohibit the circuit breaker from being pulled out of the cabinet B, and prevent the circuit breaker from closing during the insertion process; compared with the existing single-lock structure, the double-lock structure of the present invention can also double the ability to resist brute force plugging and pulling, or in other words, by increasing the number of locks, the problems of weak brute force resistance and easy deformation of the single lock can be effectively overcome.

[0020] In addition, the present invention can also simplify the structure. The first lock and the second lock are linked, and the first lock is also used to unlock the second lock. Moreover, the open / close indication establishes a direct interactive relationship with the working status of the two locking parts, which is easy to manufacture and convenient for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the double-lock plug-in circuit breaker capable of preventing closing and plugging in of the present invention, and the circuit breaker shown in the figure is in the closed state.

[0022] Figure 2 yes Figure 1 The schematic diagram of the opening state of the first embodiment is shown.

[0023] Figure 3 yes Figure 1 The three-dimensional schematic diagram of the first embodiment shown in the figure shows that the circuit breaker is in an unlocked state, and the transmission plate 5 is locked by the second locking member 4 in a position where it cannot rotate in the closing direction.

[0024] Figure 4 yes Figure 1 The overall structural diagram of the first embodiment is shown, in which the circuit breaker is in the process of plugging and unplugging, the first locking member 3 and the second locking member 4 are pressed by the cabinet B, and the transmission plate 5 is locked by the second locking member 4 in a position where it cannot rotate in the closing direction.

[0025] Figure 5 yes Figure 1 The overall structural schematic diagram of the first embodiment is shown in the figure, in which the circuit breaker is in the state of being inserted into the normal position and the circuit breaker is in the closed state, the second locking member 4 is locked by the transmission disk 5 and cannot be retreated to the retracted position, and the first locking member 3 is also controlled by the linkage of the second locking member 4 and cannot be retreated to the retracted position.

[0026] Figure 6 yes Figure 1 The illustrated embodiment is a partially enlarged stereoscopic schematic diagram, in which the circuit breaker is in a closed state.

[0027] Figure 7 yes Figure 2The partially enlarged stereoscopic schematic diagram of the embodiment shown in the figure shows that the circuit breaker is in the open state.

[0028] Figure 8 yes Figure 3 The partially enlarged stereoscopic schematic diagram of the embodiment shown in the figure shows that the circuit breaker is in an unlocked state.

[0029] Fig. 9 yes Figure 1 The overall structural diagram of the second implementation scheme of the unlocking driving part of the first embodiment is shown, and the unlocking driving part thereof is a composite unlocking driving part 20 b arranged on the indicating member 22 of the button mechanism 2 .

[0030] Fig.10 It is a schematic diagram of the overall structure of the second embodiment of the double-lock plug-in circuit breaker capable of preventing closing and plugging in of the present invention. The circuit breaker is in the closed state. Compared with the first embodiment, it adds a secondary stop structure consisting of a second stop portion 24 and a second locking portion 34.

[0031] Fig.11 yes Fig.10 As shown in the overall structural diagram of the second embodiment in the open state, the circuit breaker is in the open state, and the second stop portion 24 and the second locking portion 34 of the auxiliary stop structure are separated from each other.

[0032] Fig.12 yes Fig.10 In the three-dimensional schematic diagram of the unlocked state of the second embodiment shown, the transmission plate 5 is locked by the second locking member 4 in a position where it cannot rotate in the closing direction, and the second stop portion 24 and the second locking portion 34 of the auxiliary stop structure are separated from each other.

[0033] Fig.13 yes Fig.10 The illustrated embodiment is a partially enlarged three-dimensional schematic diagram of an implementation scheme of the embodiment, in which the circuit breaker is in a closed state, and the second stop portion 24 and the second locking portion 34 of the secondary stop structure abut against each other.

[0034] Fig.14 yes Fig.12 The illustrated embodiment is a partially enlarged three-dimensional schematic diagram of an implementation scheme of the embodiment, in which the circuit breaker is shown in an unlocked state, and the second stop portion 24 and the second locking portion 34 of the secondary stop structure are separated from each other.

[0035] Fig.15 yes Fig.11 The illustrated diagram is a partially enlarged stereoscopic schematic diagram of a second implementation scheme of the unlocking drive portion of the second embodiment, wherein the unlocking drive portion is a composite unlocking drive portion 20 b arranged on the indicator member 22 of the button mechanism 2 . DETAILED DESCRIPTION

[0036] The following is combined with Figures 1 to 15, further illustrating a specific implementation scheme of the double-lock plug-in type circuit breaker capable of preventing closing and plugging of the present invention. The double-lock plug-in type circuit breaker capable of preventing closing and plugging of the present invention is not limited to the description of the following embodiments.

[0037] A double-lock plug-in circuit breaker capable of preventing closing and plugging, comprising a circuit breaker housing 6, a button mechanism 2, a transmission disk 5 and an operating mechanism 9, wherein the transmission disk 5 is rotatably mounted in the housing 6, the button mechanism 2 is linked with the operating mechanism 9 through the transmission disk 5, and can control the circuit breaker to switch between a closed state and an open state, and further comprising a first locking member 3 having a first lock 31, a second locking member 4 having a second lock 41 and a reset spring 10, wherein the first lock 31 and the second lock 41 both have an extended position extending out of the housing 6 and a retracted position retracted into the housing 6, and the reset spring 10 drives the first lock 31 in the closed state and the open state. and the second lock head 41 are extended to their extended positions at the same time; in the said closed state, the transmission disk 5 locks the second locking member 4 to prevent the first lock head 31 and the second lock head 41 from retreating to the retracted position; in the said open state, when the second locking member 4 is retracted by the external force causing the second lock head 41 to retreat to the retracted position, the second locking member 4 locks the transmission disk 5 to prevent the transmission disk 5 from rotating in the closing direction; after the open state, the button mechanism 2 can also drive the circuit breaker to switch to the unlocked state, that is, the button mechanism 2 drives the first locking member 3, and then the first locking member 3 drives the first lock head 31 and the second lock head 41 to retreat to the retracted position at the same time, and switch to the unlocked state.

[0038] The double-lock plug-in circuit breaker capable of preventing closing and plugging of the present invention adopts two locks, namely the first lock 31 and the second lock 41, which can not only automatically prohibit the circuit breaker from being inserted into the cabinet B, but also automatically prohibit the circuit breaker from being pulled out of the cabinet B, and prevent the circuit breaker from closing during the insertion process; compared with the existing single-lock structure, the double-lock structure of the present invention can also double the ability to resist brute force plugging and pulling, or in other words, by increasing the number of locks, the problems of weak brute force resistance and easy deformation of the single lock can be effectively overcome.

[0039] See also Figures 1 to 8 In the first embodiment shown, the double-lock plug-in circuit breaker capable of preventing closing and plugging of the present invention comprises a circuit breaker housing 6, a button mechanism 2, a transmission disk 5 and an operating mechanism 9. The transmission disk 5 is rotatably mounted in the housing 6. The button mechanism 2 is linked with the operating mechanism 9 through the transmission disk 5. Of course, it also includes other components of the circuit breaker such as a short-circuit protection mechanism 11, an arc extinguishing device 12, an outgoing line connection device 13, an overload protection mechanism 14, and incoming line connection devices 1a, 1b.

[0040] A beneficial feature of the present invention is that it also includes a first locking member 3 having a first locking head 31, a second locking member 4 having a second locking head 41, a return spring 10, and a first linkage mechanism, a second linkage mechanism, an elastic driving structure, an unlocking structure, a shrinkage prevention structure and a rotation prevention structure constructed on the above-mentioned related parts. The above-mentioned mechanisms and structures will be specifically described one by one in conjunction with the accompanying drawings.

[0041] The first linkage mechanism of the present invention can control the button mechanism 2 to be linked with the transmission disk 5, and then drive the transmission disk 5 to be linked with the operating mechanism 9, and can also enable the button mechanism 2 to control them to switch between the closing state and the opening state. A preferred structure of the first linkage mechanism is as follows Figure 1-Figure 3 As shown: the first linkage mechanism includes a linkage rod 7 and a connecting rod 8, the two ends of the linkage rod 7 are rotatably hinged to the button mechanism 2 and the transmission disk 5, respectively, and the two ends of the connecting rod 8 are rotatably hinged to the transmission disk 5 and the operating mechanism 9, respectively. The function of the operating mechanism 9 is well known, and it is used to control the breaking (opening) and closing (closing) of its moving contact 9a and the static contact (not shown in the figure). Corresponding to the operating mechanism 9, the button mechanism 2 and the transmission disk 5 must have a closing state and an opening state, which belong to the prior art.

[0042] An improvement of the present invention is that, in order to make the circuit breaker easy to plug and unplug, an unlocking state is added to the button mechanism 2 and the transmission disk 5. The unlocking state is converted from the opening state, and in the unlocking state, the operating mechanism 9 and its moving contact 9a are still maintained in the disconnected state (i.e., the "opening state"). Pressing the button mechanism 2 can switch the circuit breaker to the closing state, and pulling the button mechanism 2 can switch the circuit breaker to the opening state. After the opening, the button mechanism 2 is continued to be pulled, and the button mechanism 2 drives the first locking member 3, and then the first locking member 3 drives the first lock 31 and drives the second lock 41 to retreat to the retracted position at the same time, and switches to the unlocking state. At this time, the operating mechanism 9 and its moving contact 9a are still maintained in the disconnected state (i.e., the "opening state").

[0043] The second linkage mechanism of the present invention can control the first lock head 31 on the first locking member 3 to be linked with the second lock head 41 on the second locking member 4, and through the linkage, they can be simultaneously switched between a stable extended position and a retracted position. The specific structure of the second linkage mechanism can be in various ways, and a preferred way is as follows: Figure 2 and Figures 4 to 6As shown: the second linkage mechanism comprises a first linkage abutment portion 33 provided on the first locking member 3, a second linkage abutment portion 43 provided on the second locking member 4 and a reset spring 10, and the two ends of the reset spring 10 are respectively connected to the second locking member 4 and the housing 6. The first linkage abutment portion 33 is in abutment with the second linkage abutment portion 43, and the second locking member 4 drives the first locking member 3 under the elastic force of the reset spring 10, so that the first lock head 31 and the second lock head 41 can be in a stable extended position when there is no other external force. Figure 2 and Figure 7 As shown in FIG. 1 , the circuit breaker is in the open state, the transmission plate 5 is not locked by the second locking member 4, and can be rotated in the closing direction, and the first locking member 3 and the second locking member 4 are kept in the extended position under the elastic force of the spring. When the first locking member 3 is subjected to a retracting external force (such as Figure 4 The compressive force from cabinet B is shown. Figure 3 and Figure 8 When the unlocking operation force from the button mechanism 2 is applied, the second locking member 4 is driven by the first locking member 3 to make the first locking head 31 and the second locking head 41 retreat to the retracted position.

[0044] The elastic drive structure includes a spring 10 whose two ends are respectively connected to the second locking member 4 and the housing 6. The elastic drive structure of the present invention can enable the reset spring 10 to drive the first lock head 31 and the second lock head 41 to extend to the extended position at the same time in the closed state and the open state (see Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 ). In other words, through the elastic drive structure, the reset spring 10 can perform elastic driving to control the first lock 31 and the second lock 41 to be normally extended, and the first lock 31 and the second lock 41 are normally extended to their stable extended positions in the absence of external force, or in the presence of external force but unable to overcome the elastic force of the spring. It should be emphasized that the above-mentioned external force should include: the normal unlocking operation force applied by the button mechanism 2 to the first locking member 3, which has been designed to overcome the elastic force of the spring 10; and the pressure of the cabinet B forcing the first lock 31 and the second lock 41 to retract due to the abnormal opening action that may occur during the plugging and unplugging process, which has been determined by the structure and must overcome the elastic force of the spring 10. However, the resistance of the cabinet B to the first lock 31 and the second lock 41 caused by the abnormal closing and plugging, the direction of its force has been designed to be perpendicular to the direction of the elastic force of the spring 10, so no matter how large the abnormal plugging and unplugging force is, it cannot overcome the elastic force of the spring 10. The specific structure of the elastic drive structure can be in various forms. A preferred form of the elastic drive structure includes a spring 10, two ends of which are respectively connected to the second locking member 4 and the housing 6; the spring 10 is a compression spring (see Figure 6 ), a tension spring (not shown in the figure) or a torsion spring (not shown in the figure).

[0045] The unlocking structure of the present invention can be used in Figure 3 , Figure 8 In the unlocking state shown, the button mechanism 2 drives the first locking member 3, and then the first locking member 3 drives the first lock head 31 and the second lock head 41 to retreat to the retracted position at the same time. In other words, the unlocking structure can execute the control of the button mechanism 2 driving the first locking member 3, and then the first locking member 3 drives the first lock head 31 and the second lock head 41 to retreat to the retracted position at the same time in the unlocking state. There are many specific forms of the unlocking structure. A preferred form of the unlocking structure includes an unlocking driving part 20 arranged on the button mechanism 2, an unlocking actuated part 32 and a first linkage abutment part 33 arranged on the first locking member 3, and a second linkage abutment part 43 arranged on the second locking member 4; the unlocking operation of the button mechanism 2 causes the unlocking driving part 20 to drive the unlocking actuated part 32, the unlocking actuated part 32 drives the first linkage abutment part 33, the first linkage abutment part 33 drives the second linkage abutment part 43, and the second linkage abutment part 43 drives the second locking member 4 to retreat to its retracted position.

[0046] Through the description of the embodiments of the second linkage mechanism, the elastic drive structure and the unlocking structure given above, the following general features can be obtained, which include: in the closed state and the open state, the elastic force of the reset spring 10 drives the first lock 31 and the second lock 41 to extend to the extended position at the same time; in the unlocked state, the button mechanism 2 drives the first locking member 3 and makes the first lock 31 and the second lock 41 retreat to the retracted position at the same time. Obviously, the beneficial effects of these features are: it can simplify the positioning structure of the first lock 31 and the second lock 41 to stabilize in the extended position and the retracted position, and can also effectively avoid the random displacement of related components due to the free gap and external force, vibration and other factors. This random displacement may affect the user's impression of the product at the least, and may cause the dislocation or failure of related parts at the worst.

[0047] like Figure 5 , Figure 6 , Figure 1As shown, the retraction structure of the present invention can make the transmission disc 5 lock the second locking member 4 in the closing state to prevent the first locking head 31 and the second locking head 41 from retreating to the retracted position. In other words, the retraction structure can make the transmission disc 5 lock the second locking member 4 in the closing state to stop the retraction of the second locking head 41 (i.e., "retraction"), and the retraction effect is not only on the second locking head 41 on the second locking member 4, but also on the first locking head 31 linked thereto. There are many specific forms of the retraction structure, and a preferred form of the retraction structure includes a first locking portion 42 arranged on the second locking member 4 and a first retraction portion 52 correspondingly arranged on the transmission disc 5. When the transmission disc 5 rotates to the closing position, the first retraction portion 52 rotates with the transmission disc 5 to the position facing the first locking portion 42 of the second locking member 4, and the first retraction portion 52 blocks the first locking portion 42, thereby locking the second locking member 4 from retreating to the retracted position.

[0048] like Figure 3 , Figure 4 , Figure 8 As shown, the anti-rotation structure of the present invention can make the second locking member 4 lock the transmission disc 5 in the said open or unlocked state to prevent the transmission disc 5 from rotating in the closing direction. In other words, the anti-rotation structure can be in the said open state (see FIG. Figure 4 ) or unlock (see Figure 3 and Figure 8 ) state, the second locking member 4 is controlled to stop the rotation of the transmission disc 5. There are many specific forms of the anti-rotation structure, and a preferred mode of the anti-rotation structure includes a first locking portion 42 arranged on the second locking member 4 and a corresponding anti-rotation portion 51 arranged on the transmission disc 5. When the transmission disc 5 rotates to the opening position, the anti-rotation portion 51 rotates with the transmission disc 5 to a position facing the first locking portion 42, and when the second locking member 4 retreats to the retracted position, the first locking portion 42 blocks the first retracting portion 52, and the transmission disc 5 is locked by the blocking so that it cannot rotate in the closing direction.

[0049] It is easy to understand that in order to stabilize the first lock head 31 and the second lock head 41 in the extended position and the retracted position at the same time, a corresponding positioning structure is required. The positioning structure can be in various forms. One of the simplest forms is as follows: Figure 1-Figure 8 As shown: When closing the circuit breaker (see Figure 1 and Figure 6 ) or open (see Figure 2 and Figure 7 ) state, the housing 6 directly blocks the body of the first locking member 3, and the elastic force of the spring 10 is transmitted from the second locking member 4 to the first locking member 3 in sequence, and finally acts on the housing 6. The abutment between the housing 6 and the body of the first locking member 3 makes the second lock head 41 and the first lock head 31 always extend and remain in a stable extended position. During the unlocking operation (see Figure 4 ), the elastic force of the spring 10 that drives the second locking member 4 and the first locking member 3 to abut in sequence still exists, but the unlocking operation can overcome the elastic force of the spring 10, so that the first lock head 31 and the second lock head 41 can retreat to the retracted position. The positioning structure is as follows: the unlocking operation force of the button mechanism 2 is transmitted from the first locking member 3 to the second locking member 4 in sequence, and finally acts on the housing 6. The abutment between the housing 6 and the second locking member 4 causes the second lock head 41 and the first lock head 31 to retreat and remain in the retracted position (see Figure 3 , 4 and Figure 8 ). Obviously, this embodiment has the advantages of simple structure, easy large-scale automated production, and no additional processing cost.

[0050] In summary, another beneficial feature of the present invention is that, since the second linkage mechanism, unlocking structure, shrinkage stop structure and rotation stop structure are directly constructed on the first locking member, the second locking member 4 and / or the transmission disk 5, while increasing the number of locks, the structure can be greatly simplified and the number of parts can be reduced. Compared with the existing plug-in miniature circuit breaker with a single lock without shrinkage stop and rotation stop function, the present invention also omits the release member. In addition, due to the adoption of the second linkage mechanism, unlocking structure, shrinkage stop structure and rotation stop structure, the first locking member, the second locking member 4 and the transmission disk 5 are added with new special functions, and their shapes, connections, drives, transmissions, linkages, controls, matching and other structures are also qualitatively changed. For example, the transmission disk 5 is not only a transmission member for realizing the linkage between the button mechanism 2 and the operating mechanism 9, but also a control member for controlling the shrinkage stop of the second locking member 4, and is also a controlled member controlled by the second locking member 4 to stop its own rotation. The first locking member 3 is not only a support member for the first lock 31, but also an unlocking transmission member.

[0051] Another beneficial feature of the present invention is the optimized structural design of the components of the first locking member 3, the second locking member 4, the transmission disk 5, and the button mechanism 2. These designs are not only for realizing new functions such as double locks, preventing closing and plugging, unlocking and easy plugging, stopping retraction, and stopping rotation, but also for simplifying and optimizing the specific structure, providing the possibility for miniaturization of the product, and further improving the quality performance and manufacturing performance of the product. Specifically, the structure of the first locking member 3 can have various forms, and a preferred solution is as follows: the first locking member 3 is provided with a first lock head 31, an unlocking actuated portion 32, a first linkage abutment portion 33 and a first rotation pair 30, and the first locking member 3 is installed in the housing 6 through the first rotation pair 30, the unlocking actuated portion 32 and the first lock head 31 are respectively located at the two ends of the first locking member 3, and the first lock head 31 and the first linkage abutment portion 33 are located on both sides of one end of the first locking member 3; the unlocking actuated portion 32 is driven and cooperated with the button mechanism 2, and the cooperation causes the first locking member 3 to unlock and rotate; the first linkage abutment portion 33 abuts and cooperates with the second linkage abutment portion 43 of the second locking member 4, and the cooperation causes the first lock head 31 to be linked with the second lock head 41. The structure of the second locking member 4 can have various forms. A preferred solution is as follows: the second locking member 4 is provided with a second locking head 41, a first locking portion 42, a second linkage abutment portion 43 and a linear motion pair 40. The second locking member 4 is linearly movable and installed in the housing 6. The direction of the linear movement is perpendicular to the plug-in and pull-out direction A of the circuit breaker. The second locking head 41 and the first locking portion 42 are respectively located at the two ends of the second locking member 4. The first locking portion 42 is located on the side close to the inside of the housing 6. The second linkage abutment portion 43 is located on one side of the second locking head 41. The second locking member 4 is installed in the housing 6 through the linear motion pair 40. The first locking portion 42 blocks and cooperates with the transmission disk 5. The second linkage abutment portion 43 abuts and cooperates with the first linkage abutment portion 33 of the first locking member 3. The structure of the transmission disc 5 can be in various forms. A preferred solution is as follows: the transmission disc 5 is provided with a rotation-stopping portion 51, a first retracting portion 52 and a second rotation pair 50, and the transmission disc 5 is installed in the housing 6 through the second rotation pair; the rotation-stopping portion 51 faces the first locking portion 42 on the second locking member 4 in the open state, and when the second locking head 41 is retracted, the rotation-stopping portion 51 is blocked and locked by the first locking portion 42, and the locking prevents the transmission disc 5 from moving in the closing direction. The first retracting portion 52 cooperates with the first locking portion 42 on the second locking member 4 in the closed state to lock the second locking member 4 and the second locking head 41 from retreating to the retracted position.

[0052] It should be understood that the existing structure that uses a locking boss to limit the closing and pulling out of the circuit breaker cannot limit the brute force pulling out (it is easy to slip when the brute force is pulled out, so that the locking boss fails to limit the restriction) because: the pulling force of the circuit breaker pulled out by brute force in the closed state causes the circuit breaker to be subjected to a lateral force, which inevitably has the effect of causing the cabinet to deform and / or the lateral displacement of the circuit breaker, and this effect enlarges the installation gap between the cabinet at the locking boss and the circuit breaker housing, and these unfavorable factors are difficult to eliminate in the structure of the existing diagonal fastener of the circuit breaker. On the contrary, another beneficial feature of the present invention is that the first locking member 3 and the second locking member 4, which are used as the supporting members of the first lock 31 and the second lock 41 respectively, have their mechanical structures significantly optimized. Specifically, with respect to the first locking member 3, the extension / retraction movement of the first lock 31 thereon is a swing around the rotation center of the first rotating pair 30, and the tangent of the motion trajectory of the swing at the extended position is perpendicular to the plug-in direction A of the circuit breaker. The first rotating pair 30 is located on the side of the first lock 31 facing the cabinet opening end B1, so that the first rotating pair 30 can become a hook-type fulcrum of the first lock 31 when the switch is closed and pulled out. The advantage of this design is that, since the tangent of the motion trajectory of the swing at the extended position is perpendicular to the plug-in and pull-out direction A of the circuit breaker, that is, the swing direction of the first lock 31 at the extended position is perpendicular to the plug-in and pull-out direction A of the circuit breaker, the direction of the external force of the cabinet B acting on the first lock 31 caused by the plug-in and pull-out force of the circuit breaker in the closed state is parallel to the plug-in and pull-out direction A, that is, the component force of the external force on the first lock 31 in the direction perpendicular to the plug-in and pull-out direction A (referred to as the lateral direction) tends to zero. Another advantage of this design is that, since the first rotating pair 30 can become a hook-type fulcrum of the first lock 31 when the switch is closed and pulled out, even if the lateral component force is not zero, the pulling force of pulling out the circuit breaker in the closed state reduces the installation gap between the cabinet B at the first lock 31 and the circuit breaker housing 6. Specifically, with respect to the second locking member 4, the extension / retraction movement of the second lock head 41 thereon is a linear movement defined by the linear motion pair 40, and the direction of the linear movement is perpendicular to the plug-in and pull-out direction A of the circuit breaker. The advantage of this design is that, since the linear movement direction of the second lock head 41 is perpendicular to the plug-in and pull-out direction A of the circuit breaker, the direction of the external force of the cabinet B acting on the second lock head 41 due to the plug-in and pull-out force of the circuit breaker in the closed state is perpendicular to the linear movement direction of the second lock head 41, that is, the lateral component of the external force on the second lock head 41 is zero.

[0053] The linear motion pair 40 of the present invention can have various forms, see Figure 1A preferred solution of the linear motion pair 40 is a slide-slider type linear motion pair, which includes a guide slot provided on the housing 6 and a sliding block provided on the second locking member 4. Of course, other available structures are not excluded, such as a cylindrical structure, that is, the linear motion pair 40 is a cylindrical linear motion pair, which includes a guide hole provided on the housing 6 and a sliding column structure provided on the second locking member 4 (not shown in the figure).

[0054] like Figure 1-8 As shown in FIG. 9 , the unlocking structure of the first embodiment of the present invention has two implementation schemes, wherein the first implementation scheme is as follows: Figures 1 to 8 As shown, the second embodiment is as follows Fig. 9 shown.

[0055] See also Figures 6 to 8 , the first implementation scheme of the unlocking structure of the first embodiment of the present invention, the button mechanism 2 includes a button member 21, the unlocking drive part 20 is arranged on the button member 21, and the unlocking drive part 20 is in the form of a single unlocking drive part 20a arranged on the button member 21, and the function of the single unlocking drive part 20a is only unlocking drive; during the movement of the button member 21 between the closing position and the opening position, the unlocking drive part 20 and the unlocking driven part 32 on the first locking member 3 are released from the driving relationship, so that the first locking member 3 is not restricted by the single unlocking drive part 20a; during the movement of the button member 21 from the opening position to the unlocking position, the single unlocking drive part 20a drives the unlocking driven part 32 and causes the first locking member 3 to unlock and rotate. The single unlocking driving portion 20a is an unlocking boss arranged on the side of the button member 21 close to the first locking member 3. When the button member 21 is pressed to close the circuit breaker, the unlocking boss is not in contact with the first locking member 3. When the button member 21 is pulled to open the circuit breaker, the unlocking boss is not in contact with the first locking member 3, or is just in contact with the first locking member 3. After opening the circuit breaker, the button member 21 is continued to be pulled, and the unlocking boss drives the unlocking driven portion 32 to unlock and rotate the first locking member 3.

[0056] like Fig. 9 As shown, the second implementation scheme of the unlocking structure of the first embodiment of the present invention, the button mechanism 2 includes a button member 21 and an indicator member 22 disposed in the button member 21 for indicating the closing / opening state of the circuit breaker, and the unlocking drive unit 20 is disposed on the indicator member 22; the unlocking drive unit 20 is in the form of a composite unlocking drive unit 20b disposed on the indicator member 22 of the button mechanism 2, and the function of the composite unlocking drive unit 20b is not only unlocking drive, but also indicator drive (driving the indicator member 22 to indicate conversion). When the button mechanism 2 moves from the opening position to the unlocking position, the unlocking drive unit 20 on the indicator member 22 drives the unlocking driven portion 32 and causes the first locking member 3 to unlock and rotate.

[0057] Specifically, Fig. 9 As shown, the indicator 22 includes a rotating shaft 22a, a display end face 22b and an unlocking drive part 20 arranged at one end of the rotating shaft 22a, the unlocking drive part 20 is a composite unlocking drive part 20b, and the display end face 22b is provided with an indicator part used as an opening and closing mark, the button member 21 is provided with a cavity-type mounting hole inside, and the operating end face of the button member 21 is provided with an observation window that penetrates the mounting hole. The indicator 22 is installed in the mounting hole of the button member 21 through the rotating shaft 22a and can swing around the axis. The swing drives the indicator on the display end face 22b to move under the observation window, and the corresponding opening and closing state is displayed by the indicator moving into the observation window.

[0058] The indicator 22 is also a moving part, which also needs a driving structure to switch between the closing and opening positions. There are many ways to construct the driving structure, including: one is to construct it between the indicator 22 and the housing 6, the indicator 22 is provided with an indicating drive part, the indicating drive part is provided with an opening indicating drive surface and a closing indicating drive surface arranged at intervals, and the housing 6 is provided with an indicating protrusion extending between the opening indicating drive surface and the closing indicating drive surface. When the button mechanism 2 is pressed to close the switch, the closing indicating drive surface contacts and cooperates with the indicating protrusion, so that the indicator The member 22 moves to the closing position and remains in the closing indication state; when the pull-button mechanism 2 is operated to open the switch, the opening indication driving surface contacts and cooperates with the indicating protrusion, and the cooperation causes the indicating member 22 to move to the opening position and remain in the opening indication state; after opening the switch, the button mechanism 2 is continued to be pulled, and the unlocking driving part 20 is a driving boss arranged on the indicating member, and the unlocking driving part 20 drives the unlocking driven part 32 to unlock and rotate the first locking member 3, and the first locking member 3 drives the first lock head 31 and drives the second lock head 41 to retreat to the retracted position at the same time, and switch to the unlocking state.

[0059] Another construction mode of the driving structure of the indicator 22 is to construct it between the indicator 22 and the first locking member 3. The indicator 22 includes a rotating shaft 22a, a display end face 22b arranged on the rotating shaft 22a, and a driving structure constructed between the indicator 22 and the first locking member 3, through which the corresponding action position relationship between the indicator 22 and the first locking member 3 can be established. The "action position relationship" is: when the first locking member 3 is in the closing position, the indicator 22 is also in the closing position; when the first locking member 3 is in the opening position, the indicator 22 is also in the opening position; when the first locking member 3 is in the unlocking position, the indicator 22 still maintains or displays the opening indication. Here, "maintaining or displaying the opening indication" may include: during the unlocking action of the first locking member 3, the indicator 22 remains stationary, that is, it still maintains the opening position; during the unlocking action of the first locking member 3, the indicator 22 moves with it, but the display end face 22b still does not move out of the display window of the opening indication, that is, it still displays the opening indication.

[0060] A preferred way of constructing the specific structure of the driving structure between the indicator 22 and the first locking member 3 is to construct it on the unlocking driving part 20, that is, the composite unlocking driving part 20b:

[0061] The unlocking drive part 20 is also provided with an opening indication drive surface and a closing indication drive surface arranged at intervals, and the unlocking actuated part 32 of the first locking member 3 extends between the opening indication drive surface and the closing indication drive surface; when the button mechanism 2 is pressed for closing operation, the closing indication drive surface contacts and cooperates with the unlocking actuated part 32, and the cooperation causes the indicator 22 to move to the closing position and remain in the closing indication state; when the button mechanism 2 is pulled for opening operation, the opening indication drive surface contacts and cooperates with the unlocking actuated part 32, and the cooperation causes the indicator 22 to move to the opening position and remain in the opening indication state; after the opening operation, the button mechanism 2 is continuously pulled, and the opening indication drive surface drives the unlocking actuated part 32 and causes the first locking member 3 to unlock and rotate, and the first locking member 3 drives the first lock head 31 and drives the second lock head 41 to retreat to the retracted position at the same time, and switch to the unlocking state. The beneficial features of this structural mode are: simplified structure, easy to manufacture, convenient for large-scale production, and at the same time, a direct interactive relationship is established between the opening / closing indication and the working state of the locking members 3 and 4.

[0062] See also Figure 10-15 The second embodiment of the double-lock plug-in circuit breaker capable of preventing closing and plugging of the present invention is different from the first embodiment in that the second embodiment is further provided with a secondary shrinkage prevention structure to further improve the reliability of locking.

[0063] See also Figures 10 to 14 The second embodiment of the present invention is given, and its overall structure is the same as Figure 1-8The first embodiment is basically the same, and its feature is that the double-lock plug-in circuit breaker further includes a secondary stop structure, which includes a second locking portion 34 provided on the first locking member 3, and a second stop 24 provided on the button mechanism 2. In the closed state, the second stop 24 abuts against the second locking portion 34 (see Fig.10 and Fig.13 ), at this time, the second locking member 4 is locked by the transmission plate 5 and cannot be retracted to the retracted position, and the first locking member 3 is also controlled by the second locking member 4 and cannot be retracted to the retracted position, and the second stop portion 24 of the secondary stop structure abuts against the second locking portion 34, so that the first locking member 3 cannot be retracted to the retracted position. Fig.11 In the open state, the transmission plate 5 is not locked by the second locking member 4 and can rotate in the closing direction. The first locking member 3 and the second locking member 4 are kept in the extended position under the elastic force of the spring 10, and the second stop portion 24 and the second locking portion 34 of the auxiliary stop structure are in a separated state. That is, in the open state, the second stop portion 24 and the second locking portion 34 are separated, and in the unlocked state, the second stop portion 24 and the second locking portion 34 are still separated (see Fig.12 and Fig.14 ).

[0064] Will Figures 10 to 14 The second embodiment shown is Figures 1 to 8 Compared with the first embodiment shown in the figure, the difference is that the secondary shrinkage structure of the second embodiment shrinks the first locking member 3, and the secondary shrinkage structure can reduce the load of the shrinkage structure on the second locking member 4 to further enhance the ability to resist brute force plugging and unplugging. It should be pointed out that due to the second linkage mechanism, the first locking member 3 still has a shrinkage function in the absence of the secondary shrinkage structure, but this function is provided by the shrinkage structure on the second locking member 4.

[0065] Figure 10-14 In the embodiment, the unlocking structure is arranged on the button member 21. Fig.15 is a second implementation scheme of the unlocking structure of the second embodiment of the present invention, which is Fig. 9 The unlocking drive unit 20 is similarly arranged on the indicator 22 and will not be described in detail again.

[0066] Combine the following Figures 1 to 15 , further illustrating how the double-lock plug-in circuit breaker capable of preventing closing and plugging in of the present invention cooperates with cabinet B to form a structure to prevent closing and plugging in, including a closing-stop insertion structure, a closing-stop pull-out structure, and a closing-stop structure during the plugging and pulling process.

[0067] The closing insertion-stop structure means that when the circuit breaker is in the closed state and has not yet been inserted for installation, the first locking head 31 of the first locking member 3 and the second locking head 41 of the second locking member 4 are both in the extended position that cannot be retracted. Figure 1 As shown, the circuit breaker is in the closed state, the second locking member 4 is locked by the transmission disc 5 and cannot be retracted to the retracted position, and the first locking member 3 is also controlled by the linkage of the second locking member 4 and cannot be retracted to the retracted position. At this time, if forced insertion is implemented, the first lock head 31 and the second lock head 41 will simultaneously contact and cooperate with the end surface of the opening end B1 of the cabinet B to double the ability of the circuit breaker to prevent brute force closing and insertion.

[0068] The closing and pulling-out preventing structure means that when the circuit breaker is inserted and installed in place and in the closing state, the first lock head 31 of the first locking member 3 and the second lock head 41 of the second locking member 4 are both in the extended position that cannot be retracted. At this time, if forced pulling is performed, the first lock head 31 and the second lock head 41 will simultaneously contact and cooperate with the hole wall surface of the limit hole B0 of the cabinet B to double the ability of the circuit breaker to prevent brute force closing and pulling.

[0069] The structure of preventing closing during the plugging and unplugging process means that during the insertion or removal of the circuit breaker, the first lock head 31 of the first locking member 3 and the second lock head 41 of the second locking member 4 are simultaneously pressed by the cabinet B in a retracted position where they cannot be extended, and the two pressing forces of the cabinet B acting on the first lock head 31 and the second lock head 41 respectively can simultaneously control the transmission disk 5 from rotating in the closing direction.

[0070] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A double-lock plug-in circuit breaker capable of preventing closing and plugging, comprising a circuit breaker housing (6), a button mechanism (2), a transmission disc (5) and an operating mechanism (9), wherein the transmission disc (5) is rotatably mounted in the housing (6), the button mechanism (2) is linked with the operating mechanism (9) through the transmission disc (5), and can control the circuit breaker to switch between a closing state and an opening state, characterized in that: The device also comprises a first locking member (3) having a first locking head (31), a second locking member (4) having a second locking head (41), and a reset spring (10); the first locking head (31) and the second locking head (41) both have an extended position extending outside the housing (6) and a retracted position retracted into the housing (6); the reset spring (10) drives the first locking head (31) and the second locking head (41) to extend to their extended positions simultaneously in a closed state and an open state; In the closed state, the transmission disc (5) locks the second locking member (4) to prevent the first locking head (31) and the second locking head (41) from retreating to the retracted position; in the open state, when the second locking member (4) is subjected to a retracting external force and causes the second locking head (41) to retreat to the retracted position, the second locking member (4) locks the transmission disc (5) to prevent the transmission disc (5) from rotating in the closing direction; after the open state, the button mechanism (2) can also drive the circuit breaker to switch to the unlocked state, that is, the button mechanism (2) drives the first locking member (3), and then the first locking member (3) drives the first locking head (31) and drives the second locking head (41) to retreat to the retracted position at the same time, thereby switching to the unlocked state.

2. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The invention comprises a second locking portion (34) arranged on a first locking member (3), and a second stop portion (24) arranged on a button mechanism (2); the second stop portion (24) and the second locking portion (34) abut against each other in a closed state, and are separated from each other in an open and unlocked state.

3. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The invention comprises a first linkage abutment portion (33) arranged on the first locking member (3) and a second linkage abutment portion (43) arranged on the second locking member (4); the first linkage abutment portion (33) is in abutment with the second linkage abutment portion (43); two ends of a reset spring (10) are respectively connected to the second locking member (4) and a housing (6); the second locking member (4) drives the first locking member (3) under the elastic force of the reset spring (10) to make the first locking head (31) and the second locking head (41) in an extended position; when the first locking member (3) is subjected to an external force that can overcome the elastic force of the reset spring (10), the second locking member (4) is driven by the first locking member (3) to make the first locking head (31) and the second locking head (41) retreat to a retracted position.

4. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The invention comprises an unlocking driving part (20) arranged on a button mechanism (2), an unlocking driven part (32) and a first linkage abutment part (33) arranged on a first locking member (3), and a second linkage abutment part (43) arranged on a second locking member (4); the unlocking operation of the button mechanism (2) causes the unlocking driving part (20) to drive the unlocking driven part (32), the unlocking driven part (32) in turn drives the first linkage abutment part (33), the first linkage abutment part (33) drives the second linkage abutment part (43), and the second linkage abutment part (43) drives the second locking member (4) to retreat to its retracted position.

5. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The invention comprises a first locking portion (42) arranged on the second locking member (4) and a first stop portion (52) correspondingly arranged on the transmission disc (5); when the transmission disc (5) rotates to a closing position, the first stop portion (52) rotates with the transmission disc (5) to a position facing the first locking portion (42) of the second locking member (4), and the first stop portion (52) blocks the first locking portion (42) so that the second locking member (4) cannot be retracted to the retracted position.

6. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The invention comprises a first locking portion (42) arranged on the second locking member (4) and a rotation-stopping portion (51) correspondingly arranged on the transmission disc (5); when the transmission disc (5) rotates to the opening position, the rotation-stopping portion (51) rotates with the transmission disc (5) to a position facing the first locking portion (42); and when the second locking member (4) retracts to the retracted position, the first locking portion (42) blocks the first retracting portion (52) so that the transmission disc (5) cannot rotate in the closing direction.

7. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The first locking member (3) is provided with a first lock head (31), an unlocking actuated portion (32), a first linkage abutment portion (33) and a first rotation pair (30); the first locking member (3) is installed in the housing (6) through the first rotation pair (30); the unlocking actuated portion (32) and the first lock head (31) are respectively located at two ends of the first locking member (3); the first lock head (31) and the first linkage abutment portion (33) are located on both sides of one end of the first locking member (3); the unlocking actuated portion (32) is driven and matched with the button mechanism (2) to unlock and rotate the first locking member (3); the first linkage abutment portion (33) is abutted and matched with the second linkage abutment portion (43) of the second locking member (4) to link the first lock head (31) with the second lock head (41).

8. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 1 is characterized in that: The second locking member (4) is provided with a second locking head (41), a first locking portion (42) and a second linkage abutment portion (43); the second locking member (4) is installed in the housing (6) for linear movement, and the direction of linear movement is perpendicular to the plugging and unplugging direction of the circuit breaker; the second locking head (41) and the first locking portion (42) are respectively located at two ends of the second locking member (4); the first locking portion (42) is located on a side close to the inside of the housing (6); the second linkage abutment portion (43) is located on one side of the second locking head (41); the first locking portion (42) blocks and cooperates with the transmission disk (5); and the second linkage abutment portion (43) abuts and cooperates with the first linkage abutment portion (33) of the first locking member (3).

9. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 7 is characterized in that: The first lock head (31) of the first locking member (3) is extended / retracted in the form of a swing around the rotation center of its first rotating pair (30), and the tangent of the movement trajectory of the swing at the extended position is perpendicular to the plugging and unplugging direction of the circuit breaker; the first rotating pair (30) is located on the side of the first lock head (31) facing the cabinet opening end B (1), so that the first rotating pair (30) can become a hook-type fulcrum of the first lock head (31) when the switch is closed and unplugged.

10. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 8, characterized in that: The second locking member (4) is installed in the housing (6) through a linear motion pair (40), and the linear motion pair (40) is a slide-slider type linear motion pair, which includes a guide groove arranged on the housing (6) and a sliding block arranged on the second locking member (4); or, the linear motion pair (40) is a cylindrical linear motion pair, which includes a guide hole arranged on the housing (6) and a sliding column structure arranged on the second locking member (4).

11. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 4, characterized in that: The button mechanism (2) comprises a button member (21), and the unlocking drive part (20) is arranged on the button member (21); when the button member (21) moves between a closing position and an opening position, the unlocking drive part (20) releases the driving relationship with the unlocking driven part (32) of the first locking member (3), so that the first locking member (3) is not restricted by the lock drive part (20a); when the button member (21) moves from the opening position to the unlocking position, the unlocking drive part (20) drives the unlocking driven part (32) and causes the first locking member (3) to rotate in an unlocking manner.

12. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 4, characterized in that: The button mechanism (2) comprises a button member (21) and an indicator member (22) arranged inside the button member (21) for indicating the closing / opening state of the circuit breaker, and the unlocking drive unit (20) is arranged on the indicator member (22); when the button mechanism (2) moves from the opening position to the unlocking position, the unlocking drive unit (20) on the indicator member (22) drives the unlocking driven unit (32) and causes the first locking member (3) to rotate in an unlocking manner.

13. The double-lock plug-in circuit breaker capable of preventing closing and plugging according to claim 12, characterized in that: The indicating member (22) comprises a rotating shaft (22a), a display end surface (22b) and an unlocking driving part (20) arranged at one end of the rotating shaft (22a); the display end surface (22b) is provided with an indicating part used as an opening and closing mark; a cavity-type mounting hole is provided inside the button member (21); an observation window which is intersecting with the mounting hole is provided on the operating end surface of the button member (21); the indicating member (22) is installed in the mounting hole of the button member (21) via the rotating shaft (22a) and can swing around the shaft; the swing drives the indicating part on the display end surface (22b) to move under the observation window, and the corresponding opening and closing state is displayed by the indicating part which moves into the observation window; The unlocking drive part (20) is also provided with an opening indication drive surface and a closing indication drive surface which are arranged at intervals, and the unlocking actuated part (32) of the first locking member (3) extends between the opening indication drive surface and the closing indication drive surface; when the button mechanism (2) is pressed to close the switch, the closing indication drive surface contacts and cooperates with the unlocking actuated part (32) to move the indicating member (22) to the closing position and maintain it in the closing indication state; when the button mechanism (2) is pulled to open the switch, the opening indication drive surface contacts and cooperates with the unlocking actuated part (32) to move the indicating member (22) to the opening position and maintain it in the opening indication state; after opening the switch, the button mechanism (2) is continuously pulled, and the opening indication drive surface drives the unlocking actuated part (32) and causes the first locking member (3) to unlock and rotate, and the first locking member (3) drives the first locking head (31) and drives the second locking head (41) to retreat to the retracted position at the same time, thereby switching to the unlocking state.

Images