Plug-in circuit breaker

Abstract

A kind of circuit breaker, including shell, button mechanism and operating mechanism, button mechanism includes button, button includes button piece, button mechanism drives operating mechanism to carry out closing / opening, the circuit breaker further includes linkage arranged in shell, the linkage is equipped with resistance to contact boss;When button drives circuit breaker closing, button mechanism drives the resistance to contact boss of linkage to extend outside shell, and button mechanism limits linkage so that resistance to contact boss cannot return to inside shell, when button drives circuit breaker opening, the resistance to contact boss of linkage returns to inside shell, simple structure, can reliably prevent closing plug, avoid the risk of live operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage terminal electrical appliances, and in particular to an insertion type circuit breaker. BACKGROUND

[0002] With the rapid development of network communication technology, especially the popularization of 5G network, the requirement for effectively improving the safety of electrical equipment by circuit breakers is getting higher and higher. The traditional power supply mode of connecting many sockets and boards under one terminal circuit breaker cannot meet the requirements of safe power utilization and equipment protection. For example, the terminal circuit breaker used for 5G communication equipment needs to be upgraded in terms of miniaturization, intelligence, reliability, stability and other performances, and many new structures are developed in terms of use requirements, such as the requirement that the circuit breaker can be conveniently plugged in and out like a plug. Such new circuit breaker is called insertion type circuit breaker, but it does not belong to the traditional insertion type, plug-in type, drawer type and universal type circuit breaker. The use of the new insertion type circuit breaker can not only provide various safety protection performances of the circuit breaker for the power line and electrical equipment, but also meet the needs of different electrical equipment for power quality, and make the circuit breaker conveniently installed / removed from the circuit in a plug-in manner. Therefore, the structure of the insertion type circuit breaker has developed in various ways, but under the trend of miniaturization of electrical equipment, the overall structure and operation mode of the matched circuit breaker still need to be further improved, optimized and upgraded.

[0003] The existing insertion type circuit breaker lacks the function of preventing plugging in the closed state, or the locking device of the anti-plugging function is too complex in structure, transmission or occupies too much space.

[0004] In addition, the locking device of the existing insertion type circuit breaker is usually driven by a button; at the same time, the opening and closing indication of the insertion type circuit breaker also needs to act and display the opening and closing state when opening and closing, and many mechanisms need to be matched and act when opening and closing, which need to be set with independent transmission matching mechanisms, thus occupying a large space and being not conducive to the production design of the miniaturization of the circuit breaker in the later period. SUMMARY

[0005] The purpose of the present application is to provide an insertion type circuit breaker which can reliably prevent plugging in the closed state.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] The utility model provides an insert type circuit breaker, including the casing, button mechanism and operating mechanism, button mechanism includes the button, and the button includes the button piece, and button mechanism drives operating mechanism to carry out the closing / opening, and the circuit breaker further includes the linkage piece arranged in the casing, and the linkage piece is equipped with the resistance and contact boss, when the button drives the circuit breaker closing, button mechanism drives the resistance and contact boss of linkage piece to stretch out the casing, and button mechanism limits the resistance and contact boss of linkage piece and cannot return to the casing, when the button drives the circuit breaker opening, the resistance and contact boss of linkage piece returns to the casing.

[0008] Preferably, the button further comprises an indicating piece arranged in the button piece for indicating the closing / opening state of the circuit breaker, when the button drives the circuit breaker opening, the indicating piece operates to indicate the opening, and drives the linkage piece to make the resistance and contact boss return to the casing.

[0009] Preferably, when the button drives the circuit breaker closing, the indicating piece operates to indicate the closing, and drives the resistance and contact boss of the linkage piece to stretch out the casing.

[0010] Preferably, when the button drives the circuit breaker closing, the button drives the resistance and contact boss of the linkage piece to stretch out the casing.

[0011] Preferably, the linkage piece is rotationally arranged on the casing, one end is equipped with the resistance and contact boss, and the other end is equipped with a linkage piece driving part extending to the direction of the button; the indicating piece comprises a rotating shaft, a display end face and a driving boss, the display end face is equipped with an indicating part serving as the opening / closing identification, the button piece is internally equipped with a cavity type mounting hole, and the operating end face of the button piece is equipped with an observation window penetrating through the mounting hole; the indicating piece is mounted in the mounting hole of the button piece through the rotating shaft and can swing around the shaft, the swing drives the indicating part on the display end face to move under the observation window, and the indicating part moving into the observation window displays the corresponding opening / closing state; when the button moves into the casing to drive the circuit breaker closing, the driving boss of the indicating piece cooperates with the linkage piece driving part of the linkage piece to make the indicating piece rotate, so that the region of the indicating part on the display end face corresponding to the closing state corresponds to the observation window; when the button moves out of the casing to drive the circuit breaker opening, the driving boss of the indicating piece cooperates with the linkage piece driving part, the indicating piece rotates so that the region of the indicating part on the display end face corresponding to the opening state corresponds to the observation window, and the driving boss drives the linkage piece to rotate through the linkage piece driving part so that the resistance and contact boss of the linkage piece returns to the casing.

[0012] Preferably, when the button moves into the casing to drive the circuit breaker closing, the driving boss of the indicating piece cooperates with the linkage piece driving part of the linkage piece to make the indicating piece rotate at the same time, so that the resistance and contact boss of the linkage piece stretches out the casing.

[0013] Preferably, the locking member is installed in the housing by an elastic member, the locking member is provided with a locking protrusion, and the elastic member makes the locking protrusion of the locking member extend out of the housing when the circuit breaker is in the open state; the linkage member is provided with an unlocking portion matched with the locking member, and the indicating member drives the linkage member to rotate when the button moves out of the housing after the circuit breaker is opened, and the unlocking portion of the linkage member exerts force on the locking member to make the locking protrusion retreat into the housing.

[0014] Preferably, the driving protrusion is provided with a left driven end and a right driven end at intervals, the linkage member driving portion of the linkage member is bent to the left driven end and the right driven end, the left driven end is matched with the linkage member driving portion when the button drives the circuit breaker to close, and the right driven end is matched with the linkage member driving portion when the button moves out of the housing.

[0015] Preferably, the button mechanism comprises a button, a connecting rod and a driving member, the button drives the driving member to act through the connecting rod, the driving member is arranged to rotate in the housing and is connected with the operating mechanism; the locking member is installed in the housing by a linear motion pair, the linear motion direction of the linear motion pair is perpendicular to the mounting insertion direction of the circuit breaker, the locking member comprises an outward extending column, the elastic member makes the locking protrusion of the locking member extend out of the housing when the circuit breaker is in the closed state, and the outer side surface of the driving member is matched with the outward extending column of the locking member to prevent the locking member from retreating into the housing.

[0016] Preferably, the housing is provided with a limiting hole, the contact protrusion of the linkage member and the locking protrusion of the locking member are matched with the same limiting hole.

[0017] Preferably, the contact protrusion is a square protrusion, and the side surfaces on both sides of the square protrusion are perpendicular to the mounting insertion direction of the circuit breaker.

[0018] The plug-in circuit breaker of the application realizes that the circuit breaker cannot be inserted into the cabinet or pulled out of the cabinet in the closed state through the cooperation of the button mechanism and the linkage member, and the structure is very simple.

[0019] In particular, the indicating member arranged in the button member is matched with the linkage member, the indicating member acts to indicate the open state when the circuit breaker is opened, and simultaneously drives the contact protrusion of the linkage member to retreat into the housing to realize the normal insertion and pulling of the plug-in circuit breaker when the circuit breaker is opened, the cooperation of the indicating member and the linkage member reduces the transmission mechanism for triggering the actions of the two, and the two occupy less space in the circuit breaker, which is beneficial to the design of miniaturization of the circuit breaker.

[0020] In addition, the indicating member acts to drive the contact protrusion of the linkage member to extend out of the housing 6 when the circuit breaker is closed, which prevents the circuit breaker from being inserted and pulled in the closed state, and improves the safety.

[0021] In addition, the linkage is also linked with the locking mechanism. When the circuit breaker needs to be removed, the linkage unlocks the locking mechanism, causing the locking boss of the locking mechanism to retract into the housing, allowing the circuit breaker to be safely pulled out of the mounting cabinet. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the plug-in circuit breaker of the present invention.

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure of the button mechanism, linkage, and locking mechanism.

[0024] Figure 3 This is a partially enlarged schematic diagram of the linkage component, handle, and locking component of the present invention.

[0025] Figure 4 This is a schematic diagram of the structural state of a plug-in circuit breaker during installation, showing its anti-energized insertion status.

[0026] Figure 5 This is a schematic diagram of the structural state of a plug-in circuit breaker in the anti-closing pull-out state.

[0027] Figure 6 This is a partially enlarged schematic diagram of the linkage, locking components, and handle in the correctly installed and closed state.

[0028] Figure 7 This is a partially enlarged schematic diagram of the button mechanism's opening and closing indication and unlocking mechanism.

[0029] Figure 8 This is a partially enlarged schematic diagram of the opening / closing indication and unlocking mechanism in the open state.

[0030] Figure 9 This is a partially enlarged schematic diagram of the opening / closing indicator and unlocking mechanism in the closed state.

[0031] Figure 10 This is a schematic diagram of the overall structure of the opening / closing indicator and unlocking mechanism in the open / disconnected state.

[0032] Figure 11 This is a structural schematic diagram of a specific embodiment of the linkage component and housing of the present invention. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1 to 11 The given embodiments further illustrate specific implementations of the plug-in circuit breaker of the present invention. The plug-in circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0034] like Figure 1As shown, the plug-in circuit breaker of the present invention includes a housing 6, a button mechanism, an operating mechanism 9 driven and connected to the button mechanism, a moving contact 9a connected to the operating mechanism 9, and a stationary contact 9b disposed opposite to the moving contact 9a. It generally also includes (but is not limited to) a short-circuit protection mechanism 11, an arc extinguishing device 12, an overload protection mechanism 14, an outgoing line connection device 13, incoming line connection devices 1a and 1b, and other components of a circuit breaker (not shown in the figure). The button mechanism drives the operating mechanism 9 to make contact with the stationary contact to close the circuit, or drives the operating mechanism 9 to separate the moving contact from the stationary contact to open the circuit. The button mechanism has a closing position and an opening position corresponding to the closing / opening state of the circuit breaker.

[0035] like Figures 1-2 As shown, the plug-in circuit breaker is also equipped with a locking device. The housing 6 has a limiting hole 61 that cooperates with the locking device. The cabinet sheet metal part B into which the plug-in circuit breaker is inserted has a cabinet limiting hole B0. When the plug-in circuit breaker is installed in the working position, the limiting hole 61 of the plug-in circuit breaker corresponds to the cabinet limiting hole B0. When the plug-in circuit breaker is not installed in the working position, the limiting hole 61 of the plug-in circuit breaker is misaligned with the cabinet limiting hole B0, and the cabinet sheet metal part B will block the cabinet limiting hole B0. This is the prior art in this field and will not be described in detail here.

[0036] like Figure 1 , 4 As shown in Figure 5, the plug-in circuit breaker of the present invention includes a housing 6 with a limiting hole 61, a button mechanism, and an operating mechanism 9. The button mechanism drives the operating mechanism 9 to perform closing / opening operations. The button mechanism has a closing position and an opening position corresponding to the closing / opening states of the circuit breaker. The button mechanism includes a button 2, a connecting rod 7, and a driving component 5. The button 2 drives the driving component 5 to operate via the connecting rod 7. The driving component 5 is rotatably disposed within the housing 6 and connected to the operating mechanism 9. When the button 2 is pressed, the button 2 drives the driving component 5 to rotate to one side via the connecting rod 7. The driving component 5 drives the operating mechanism 9 via the U-shaped rod 8 to make the moving contact 9a contact with the stationary contact 9b to achieve closing. When the button 2 is pulled, the button 2 drives the driving component 5 to rotate to the other side via the connecting rod 7. The driving component 5 drives the operating mechanism 9 via the U-shaped rod 8 to make the moving contact 9a separate from the stationary contact to achieve opening. The driving component 5 functions similarly to the handle of a traditional miniature circuit breaker. The operating mechanism typically includes a contact support, a latch, and a trip latch connected to the moving contact 9a. The short-circuit protection mechanism 11 and the overload protection mechanism 14 are correspondingly set with the latch of the operating mechanism. When a short circuit or overload occurs, they act on the latch respectively to disengage the operating mechanism and trip the circuit breaker to achieve protection.

[0037] An improved point of the application is that the circuit breaker further comprises a locking device, the locking device comprising a linkage 3 and a locking piece 4 arranged in the shell 6, the linkage 3 being provided with a resisting boss 31, and the locking piece 4 being provided with a locking boss 41 corresponding to the limiting hole 61; when the button mechanism is in the closing position, the resisting boss 31 of the linkage 3 extends out of the shell 6 and is limited in the extended position by the button mechanism 2 and cannot retreat into the shell; when the button mechanism is in the opening position, the linkage 3 retreats into the shell 6, and the locking boss 41 of the locking piece 4 extends out of the limiting hole 61 of the shell 6, and after an external force is applied to the locking piece 4 to make the locking piece 4 retreat into the shell 6. In one embodiment, the resisting boss 31 of the linkage 3 is arranged corresponding to a second limiting hole on the shell 6, and the second limiting hole is arranged side by side with the limiting hole 61, and when the button mechanism is in the closing position, the resisting boss 31 extends out of the second limiting hole of the shell 6. As another preferred embodiment, the second limiting hole and the limiting hole 61 are the same limiting hole, and the resisting boss 31 and the locking boss 41 share the same limiting hole 61. In this embodiment, the scheme that the resisting boss 31 and the locking boss 41 share the same limiting hole 61 is adopted.

[0038] As shown in Figure 4 , 11 , the circuit breaker is closed before installation, the linkage 3 is driven to rotate counterclockwise by the first driving part 20 of the button 2, the resisting boss 31 of the linkage 3 extends out of the limiting hole 61 of the shell 6 and is limited in the extended position by the first driving part 20 of the button 2 and cannot retreat into the shell, at this time, when the circuit breaker is reloaded into the cabinet, the right profile surface 31b of the resisting boss 31 is in abutment with the transverse end surface B1 of the cabinet metal part, and the circuit breaker cannot be installed to the working position, thereby avoiding live operation and improving safety.

[0039] As shown in Figure 5 , for the case that the circuit breaker is correctly installed and closed, the resisting boss 31 of the linkage 3 extends out of the limiting hole 61 of the shell 6 and is limited in the extended position by the first driving part 20 of the button 2 and cannot retreat into the shell, and the left profile surface 31a of the resisting boss 31 is in abutment with one hole wall surface B2 of the cabinet limiting hole B0 of the cabinet metal part, at this time, the circuit breaker cannot be pulled out from the working position by pulling it outward, thereby avoiding live operation and improving safety.

[0040] As shown in Figure 1 , 6As shown, the locking member 4 is mounted in the housing 6 by an elastic member, the locking member 4 is provided with a locking boss 41 opposite to the limiting hole 61, the elastic member is mounted between the locking member 4 and the housing 6, the locking member 4 has two working positions of extension and retraction, the elastic member makes the locking boss 41 of the locking member 4 extend out of the limiting hole 61, when the circuit breaker is opened, the locking member 4 is applied with a retraction external force, then the locking boss 41 is retracted into the housing by overcoming the biasing force of the elastic member. By making the locking boss 41 of the locking member 4 extend out of the limiting hole when the circuit breaker is opened, the circuit breaker can be effectively prevented from falling out of the cabinet due to vibration caused by transportation and other reasons, and since the locking boss 41 can be retracted into the housing by applying the retraction external force to the locking member 4, when the circuit breaker is inserted into the cabinet in the opened state, the locking boss 41 of the locking member 4 is retracted into the housing under the extrusion of the external force applied by the cabinet panel, so that the circuit breaker can be smoothly inserted into the cabinet. Preferably, the locking boss 41 of the locking member 4 extending out of the limiting hole 61 has a straight-angled trapezoidal or right-angled triangular cross section, the locking boss 41 includes a straight surface perpendicular to the side wall of the limiting hole 61 and an inclined surface, the straight surface is directed to the direction of pulling the circuit breaker out of the cabinet, and the inclined surface is directed to the direction of inserting the circuit breaker into the cabinet, so that the circuit breaker is easily inserted into the cabinet when opened. The elastic member is a compression spring 10, of course, the elastic member can also be a torsion spring or a leaf spring or other elastic member.

[0041] Further preferably, as shown in Figure 2 As shown, when the button mechanism is in the open position and the locking boss 41 of the locking member 4 is retracted into the housing after the locking member 4 is applied with a retraction external force, the locking member 4 is abutted and matched with the button mechanism, so that the button mechanism cannot be switched from the open position to the closed position, the plug-in circuit breaker cannot be closed during the installation into the cabinet, the button 2 cannot be pressed to the position, and the live operation is avoided. As shown in Figure 3The preferred embodiment shown, the locking member 4 also includes an overhanging column 42, the drive member 5 includes a drive limiting portion 51 cooperating with the overhanging column 42, in this embodiment, the drive limiting portion 51 is a step provided on the side wall of the drive member 5, of course, it can also be a groove or a protrusion provided on the drive member 5. When the button mechanism is in the open position, the drive limiting portion 51 of the drive member 5 is turned to the position opposite the overhanging column 42 of the locking member 4, when the plug-in circuit breaker is inserted but not installed to the working position, the limiting hole 61 of the plug-in circuit breaker is misaligned with the cabinet limiting hole B0, the locking boss 41 of the locking member 4 is withdrawn into the shell under the extrusion of the cabinet metal member, the overhanging column 42 of the locking member 4 extends into the drive limiting portion 51 and limits the cooperation with the drive limiting portion 51, resisting the rotation of the drive member 5 to the closed position, preventing the button mechanism from switching from the open position to the closed position, so that the plug-in circuit breaker cannot be closed during installation to the installation position of the cabinet, avoiding live operation. In this embodiment, the locking member 4 and the drive member 5 resist cooperation, preventing the button mechanism from switching from the open position to the closed position, which is more reasonable in layout and occupies less space. Of course, the locking member 4 can also resist cooperation with the button 2 or the connecting rod 7, for example, by limiting the button 2 on the boss or the clamping groove to prevent the button 2 from pressing the circuit breaker; by resisting cooperation with the hook extended on the connecting rod 7, the connecting rod 7 cannot act in the closed direction.

[0042] Further preferably, as shown, Figure 5 When the button mechanism is in the closed position, the locking boss 41 of the locking member 4 extends out of the limiting hole 61 of the shell 6 and is limited in the extended position by the button mechanism and cannot be withdrawn into the shell, for assisting the linkage 3, preventing the circuit breaker from being inserted into the cabinet and pulled out of the cabinet in the closed state (the locking member 4 plays an auxiliary role, because the inclined surface 412 of the locking boss 41 of the locking member is at a certain angle with the outer surface of the circuit breaker, even if the locking boss 41 is always exposed, due to the elasticity of the cabinet metal member structure, it is still possible to forcibly push the circuit breaker in the closed state, causing safety hazards). A preferred embodiment, the drive member 5 has an outer side 52, when the button mechanism is in the closed position, the locking boss 41 of the locking member 4 extends out of the shell 6, and the drive limiting portion 51 of the drive member 5 is turned away from the overhanging column 42 to misalign, so that the outer side 52 of the drive member 5 is turned to the position of resisting cooperation with the overhanging column 42 of the locking member 4, so that the locking member 4 cannot be withdrawn into the shell 6; when the button mechanism is in the open position, the outer side 52 of the drive member 5 is misaligned with the locking member 4, and the resisting cooperation is released, at this time, the drive limiting portion 51 of the drive member 5 is turned to the position corresponding to the overhanging column 42.

[0043] Further preferably, the button mechanism can be pulled to move outwardly of the housing 6 after the circuit breaker is tripped, and the locking protrusion 41 of the locking member 4 is retracted into the housing 6 during the movement of the button mechanism outwardly of the housing 6. Preferably, the button mechanism drives the linkage 3 to unlock the locking member 4 and retract the locking protrusion 41 into the housing 6 during the movement of the button mechanism outwardly of the housing 6. As shown in Figure 3 the preferred embodiment of the locking member 4 is installed in the housing 6 through a linear movement pair, and the linear movement direction of the locking member 4 is perpendicular to the installation and insertion direction A of the circuit breaker. The locking member 4 is arranged between the button mechanism and the limiting hole 61, and the locking protrusion 41 is arranged at the upper portion of the locking member 4 close to the limiting hole 61, the outward extending column 42 is arranged at the lower portion of the locking member 4 close to the button mechanism, the linkage step 43 is arranged at the side of the locking protrusion 41, and the elastic member is arranged between the lower portion of the locking member 4 and the housing 6. The elastic member extends the locking protrusion 41 of the locking member 4 outwardly of the limiting hole 61. During the movement of the button mechanism outwardly of the housing 6 after the circuit breaker is tripped, the button mechanism drives the linkage 3 to act on the linkage step 43, and the locking member 4 retracts the locking protrusion 41 into the housing 6 against the elastic force of the elastic member. Obviously, the beneficial effects of this scheme are as follows: first, since the locking member 4 moves linearly along the direction perpendicular to the installation and insertion direction A, the stress deformation and / or micro displacement of the locking member 4 and the cabinet panel of the insertion receptor can be effectively prevented or reduced. Second, since the direction of the force of the outer side 52 acting on the locking member 4 is basically parallel to the linear movement direction of the locking member 4 when the driving member 5 is in the closed position, it is difficult to drive the locking member 4 to retract into the retracted position by artificial pulling force. Third, since the slide groove—slide block pair can provide a great constraint force in the direction perpendicular to the horizontal movement, the cooperation of the outward extending column 42 and the driving limiting portion 51 can provide a great constraint force resisting the closing of the driving member 5, thereby effectively ensuring that the circuit breaker is not accidentally closed during the insertion and extraction operation.

[0044] As shown in Figure 1 , 6As shown, the preferred embodiment of the linkage 3 is rotatably arranged on the housing 6 between the button mechanism 2 and the limiting hole 61, and comprises a resisting boss 31 and a driven boss 32. During the closing process, the button mechanism pushes the driven boss 32 to make the resisting boss 31 extend out of the limiting hole 61, and the button mechanism and the driven boss 32 resist each other to make the resisting boss 31 unable to retreat into the housing 6. During the opening process, the button mechanism releases the resisting of the driven boss 32 and gives way, and the resisting boss 31 retreats into the housing. The button mechanism comprises the button 2, the connecting rod 7 and the driving member 5. The button 2 drives the driving member 5 to act through the connecting rod 7. The driving member 5 is rotatably arranged in the housing 6 and is connected with the operating mechanism 9. The button 2 is provided with the first driving part 20 matched with the driven boss 32. Pressing the button 2 drives the operating mechanism to close through the connecting rod 7 and the driving member 5. The first driving part 20 of the button 2 drives the linkage 3 to rotate counterclockwise through the driven boss 32, so that the resisting boss 31 extends out of the limiting hole 61. When the button mechanism is in the closing position, the button 2 and the driven boss 32 abut against the longitudinal face 20a (the face arranged along the mounting direction A) of the first driving part 20, so that the resisting boss 31 cannot retreat into the housing 6, preventing the plug-in and plug-out of the circuit breaker in the closed state and avoiding the live operation. Pulling the button 2 drives the operating mechanism to open through the connecting rod 7 and the driving member 5. When the button mechanism is in the opening position, the first driving part 20 of the button 2 is dislocated from the driven boss 32 to give way, so that the resisting boss 31 retreats into the housing. When the button mechanism is in the opening position, the linkage 3 can be driven by the button mechanism to rotate clockwise to make the resisting boss 31 retreat into the housing. Of course, a spring can be arranged to make it rotate clockwise, or it can rely on the gravity of one end of the resisting boss 31 to rotate clockwise.

[0045] Preferably, the linkage 3 further comprises an unlocking portion 34 cooperating with the locking member 4 and a linkage driving portion 33 cooperating with the button mechanism, when the circuit breaker is opened, the button mechanism moves outwardly from the housing 6, the linkage driving portion 33 drives the linkage 3 to rotate, the unlocking portion 34 exerts a force on the locking member 4 to make the locking protrusion 41 of the locking member 4 retreat into the housing 6. Specifically, the preferred embodiment of the linkage 3, the linkage 3 is provided with a rotating center in the middle, one end is provided with an abutting protrusion 31 near one side of the limiting hole 61, the other end is provided with the unlocking portion 34 cooperating with the locking member 4, the other end is provided with the linkage driving portion 33 bent towards the button mechanism, and the side near the button mechanism between the rotating center and the abutting protrusion 31 is provided with a driven protrusion 32. The button mechanism is provided with a driving portion cooperating with the linkage driving portion 33, during the opening process, the button mechanism removes the resistance cooperation with the driven protrusion 32 and gives way during the movement outwardly from the housing 6, and the driving portion on the button mechanism pulls the linkage driving portion 33 to drive the linkage 3 to rotate, so that the abutting protrusion 31 retreats into the housing; when the button mechanism is in the open position, the button mechanism can be pulled to move outwardly from the housing 6, and the driving portion continues to drive the linkage 3 to rotate during the continuous movement of the button mechanism outwardly from the housing 6, so that the unlocking portion 34 exerts a retraction force on the locking member 4, and the locking member 4 retreats into the housing 6.

[0046] One embodiment is that when the button mechanism is in the open position, pulling the button 2 drives the linkage 3 to continue to rotate clockwise through the linkage driving portion 33, so that the unlocking portion 34 presses on the linkage step 43 of the locking member 4, the locking protrusion 41 of the locking member 4 retreats into the housing 6, so that the circuit breaker can be smoothly pulled out of the cabinet after being opened by pulling the button 2. One embodiment is that the protrusion on the button 2 is used as the driving portion, and the abutting protrusion 31 of the linkage 3 retreats into the housing during the opening. Another embodiment can also use a reset spring to make the abutting protrusion 31 of the linkage 3 rotate away from the limiting hole 61, and after the button mechanism removes the resistance cooperation with the driven protrusion 32 and gives way during the opening, the reset spring makes the abutting protrusion 31 of the linkage 3 retreat into the housing.

[0047] As a preferred embodiment, the button 2 of the button mechanism comprises a button piece 21 and an indicating piece 22, the indication of closing and opening of the circuit breaker is realized by the cooperation of the indicating piece 22 and the linkage piece 3, and the locking boss 41 of the locking piece 4 can be driven to retreat into the housing 6 after the circuit breaker is opened. The indicating piece 22 comprises a rotating shaft 221, a display end face 223 and a driving boss 222 arranged on the rotating shaft 221, the driving boss 222 is used as a driving part to cooperate with the linkage driving part 33 of the linkage piece 3, the indicating part on the display end face 223 is provided with corresponding color blocks or words as the indication of closing and opening of the circuit breaker, the inside of the button piece 21 is provided with a cavity type mounting hole 211, the operating end face of the button piece 21 is provided with an observation window 212 which is in communication with the mounting hole 211, the indicating piece 22 is mounted in the mounting hole 211 of the button piece 21 through the rotating shaft 22 and can swing around the shaft, the swing drives the indicating part on the display end face 223 to move under the observation window 212, the indicating part moving into the observation window 212 displays the corresponding closing and opening state; when the circuit breaker is closed, the button 2 moves into the housing 6, the driving boss 222 cooperates with the linkage driving part 33 to drive the indicating piece 22 to rotate, so that the area of the indicating part on the display end face 223 corresponding to the closing state corresponds to the observation window 212; when the circuit breaker is opened, the button 2 moves out of the housing 6, the driving boss 222 of the indicating piece 22 cooperates with the linkage driving part 33, the indicating piece 22 rotates so that the area of the indicating part on the display end face 223 corresponding to the opening state corresponds to the observation window 212. At the same time, the driving boss 222 drives the linkage piece 3 to rotate through the linkage driving part 33 so that the abutting boss 31 retreats into the housing, at this time, the unlocking part 34 of the linkage piece 3 has not driven the locking piece 4 to retreat into the housing 6 (the unlocking part 34 just contacts with the linkage step 43 of the locking piece 4 or leaves a gap); after the circuit breaker is opened, the button 2 is continuously pulled, when the button 2 moves out of the housing 6, the driving boss 222 drives the linkage piece 3 to rotate through the linkage driving part 33, the unlocking part 34 drives the locking piece 4 to retreat into the housing 6.

[0048] In this embodiment, when the circuit breaker is closed, the first driving part 20 of the button 2 cooperates with the driven boss 32 of the linkage piece to drive the abutting boss 31 of the linkage piece to extend out of the housing 6. As another embodiment, the abutting boss 31 of the linkage piece 3 can also be driven to extend out of the housing 6 by the indicating piece 22, that is, when the button 2 moves into the housing 6 to drive the circuit breaker to close (see Figure 9 ), the driving boss 222 of the indicating piece 22 cooperates with the linkage driving part 33 of the linkage piece 3, the indicating piece 22 rotates so that the area of the indicating part on the display end face 223 corresponding to the closing state corresponds to the observation window 212 to indicate the closing of the circuit breaker, at the same time, the linkage piece 3 is rotated so that the abutting boss 31 of the linkage piece 3 extends out of the housing 6.

[0049] Specifically as Figures 7-9As shown, the drive boss 222 is located on one side of the rotating shaft 221. The drive boss 222 extends out of the button 2 and cooperates with the linkage drive part 33. Alternatively, the linkage drive part 33 can be bent and extended into the button 2 to cooperate with the drive boss 222. In addition, the drive boss 222 may not be located on the rotating shaft 221, for example, it can be located on the side of the connecting rod between the rotating shaft 221 and the display end face 223.

[0050] Preferably, the indicator 22 has a left driven end 222b and a right driven end 222a spaced apart on its driving boss 222. The linkage drive part 33 of the linkage 3 is bent towards the button 2 and located between the left driven end 222b and the right driven end 222a. When the button 2 is pressed to close the circuit breaker, the inclined surface of the left driven end 222b rotates counterclockwise due to the resistance of the linkage drive part 33. At this time, the corresponding color of the closing indicator on the display end face 223 can be displayed in the observation window 212. The color of the block moved into the observation window 212 indicates the corresponding opening or closing status. This solution has a simple structure and can be combined with it to simplify the unlocking structure. When the button 2 is pulled to perform the tripping operation, the right driven end 222a of the indicator acts on the right side of the linkage drive part 33 of the linkage 3. The linkage 3 rotates clockwise around the axis under force, causing the contact boss 31 of the linkage 3 to retract into the housing. The indicator 22 rotates clockwise. At this time, the tripping mark of the corresponding color on the indicator on the display end face 223 can be displayed in the observation window 212. At this time, the unlocking part 34 of the linkage 3 is just in contact with the locking part 4 or there is a gap. The locking boss 41 of the locking part 4 remains protruding outside the housing 6.

[0051] like Figure 8 As shown, in the open state, when it is necessary to remove the circuit breaker from the installation cabinet, continue to pull the button mechanism away from the circuit breaker. The right driven end 222a of the indicator acts on the right side of the linkage drive part 33 of the linkage 3. The linkage 3 is subjected to force and rotates clockwise around the axis. The unlocking part 34 acts on the linkage part 43 of the locking part 4. The locking boss 41 overcomes the thrust of the spring 10 and slides back into the circuit breaker. The locking boss 41 is released from the cabinet, and the circuit breaker can be removed from the working position. Its beneficial effects are: First, the indication and the plug-in safety protection are directly linked, so that the closing / opening display and the extended / retracted positions of the locking boss 41 and the contact boss 31 form a direct and fixed correspondence, so that the operator can intuitively grasp the current safety status of the circuit breaker. Secondly, the possibility of allowing the protruding / retracting bosses 41 on the contacting boss 31 and the locking boss 4 to extend / retract from the same common limiting hole 61 reduces the manufacturing difficulty of the insertion receiver, facilitates interchangeability and universality between circuit breaker products and insertion receivers, and reduces user costs. Thirdly, the simple structure and few parts effectively support the miniaturization and low-cost manufacturing of circuit breaker products.

[0052] Preferably, the interference boss 31 is a square boss, the side faces of the square boss are perpendicular to the installation insertion direction of the circuit breaker, the side faces of the interference boss 31 are a left profile surface 31a and a right profile surface 31b, when the interference boss 31 is in the extended position, the left profile surface 31a and the right profile surface 31b are respectively perpendicular to the side wall of the limiting hole 61, that is, perpendicular to the installation insertion direction of the circuit breaker, the left profile surface 31a prevents the circuit breaker from being pulled out of the cabinet in the direction of pulling the circuit breaker out of the cabinet, and the right profile surface 31b prevents the circuit breaker from being inserted into the cabinet in the direction of inserting the circuit breaker into the cabinet, wherein the right profile surface 31b interferes with the transverse end surface B1 of the cabinet panel of the insertion receptor to prevent the insertion of the circuit breaker, and the left profile surface 31a interferes with one hole wall surface B2 of the limiting hole B0 of the cabinet panel of the insertion receptor, which has the beneficial effect that the stress deformation of the insertion receptor can be effectively reduced, the adaptation tolerance of the insertion receptor can be effectively relaxed, the use is effectively facilitated, and the use cost is reduced. Preferably, the side of the driven boss 32 close to the button 2 is a bevel.

[0053] Specifically, as shown in the preferred embodiment of the plug-in circuit breaker of the application, Figure 1 The button mechanism includes a button 2, a connecting rod 7, and a driving member 5, the button 2 drives the driving member 5 to rotate through the connecting rod 7, and the driving member 5 drives the operating mechanism 9 to perform closing / opening through the connecting rod 8, the button mechanism and the driving member 5 have a closing position and an opening position corresponding to the closing / opening of the circuit breaker, that is, in the closing state, the button mechanism and the driving member 5 have a certain position (closing position), and in the opening state, the button mechanism and the driving member 5 also have a certain position (opening position); the closing position / opening position corresponds to the closing / opening of the moving contact 9a and the stationary contact 9b.

[0054] The shell 6 is provided with a limiting hole 61, the locking member 4 is slidingly arranged at a position corresponding to the driving member 5, between the driving member 5 and the limiting hole 61, the linkage member 3 is rotatably arranged between the button 2 and the limiting hole 61, and the linkage member 3 is arranged on the left side of the locking member 4, above the button mechanism.

[0055] An advantageous feature of the present application is that when the button mechanism is in the closed position, the linkage 3 is limited by the button mechanism to the extended position and cannot be withdrawn to the retracted position. The advantageous effect of this structure is that it can reliably prevent the closed plug-in, i.e. prevent the circuit breaker from being forcibly plugged in the closed state. Due to the feature of not being able to be withdrawn to the retracted position provided by the structure, the ability of the circuit breaker product to resist abnormal forceful plugging is effectively enhanced. When the button mechanism is in the open position, the linkage 3 can be in various technical solutions. One of the optional solutions is that the linkage 3 is not limited by the button mechanism and can be converted between the extended position and the retracted position, which has the advantage of simple structure. Another optional solution, which is also the preferred solution of the present application, is that the linkage 3 is limited by the button mechanism and is in the retracted position when the button mechanism is in the open position, which has the advantage that the linkage 3 can directly avoid resistance to the normal plugging of the circuit breaker. Another advantage of the device of the present application is that the linkage 3 is used as an unlocking member, which can simplify the structure of the unlocking mechanism, reduce the number of parts, and achieve simultaneous retraction of the linkage 3 and the driving locking member 4, so that the linkage 3 and the driving locking member 4 do not produce any resistance to the normal plugging of the circuit breaker.

[0056] Another advantageous feature of the present application is that when the circuit breaker is in the open state, the locking protrusion 41 of the locking member 4 extends out of the housing 6, but when it is subjected to a retracting external force (only horizontal force will not cause the locking member 4 to retract, and a vertical component force in the retracting direction is required), it can be pushed back into the housing 6 by the retracting external force, i.e. it does not prevent the circuit breaker from being inserted into the cabinet in the open state, and it also prevents the circuit breaker from falling out of the cabinet during transportation and the like due to receiving vibrations. Another advantageous feature of the present application is that when the button mechanism is in the open position, the locking protrusion 41 of the locking member 4 is retracted into the housing, and the locking member 4 resists the driving member 5, preventing the driving member 5 from rotating, preventing the button mechanism from switching from the open position to the closed position, and preventing the circuit breaker from being closed. Another advantageous feature of the present application is that when the button mechanism is in the closed position, the locking member 4 is limited by the driving member 5 to the extended position and cannot be withdrawn to the retracted position, which, as an auxiliary mechanism together with the linkage 3, can reliably prevent the circuit breaker from being forcibly pulled out in the closed state. Due to the feature of not being able to be withdrawn to the retracted position provided by the structure, the ability of the circuit breaker product to resist abnormal forceful plugging is effectively enhanced.

[0057] The locking member 4 has the following advantages: first, since the locking member 4 moves linearly perpendicular to the insertion direction A, the stress deformation and / or micro-displacement of the locking member 4 and the cabinet panel of the insertion receptor can be effectively prevented or reduced; second, since the force direction of the outer side 52 acting on the locking member 4 is substantially parallel to the linear moving direction when the driving member 5 is in the closed position, it is difficult to drive the locking member 4 to retreat to the retracted position by artificial pulling force; third, since the slide-groove and slide-block pair can provide a great constraint force in the direction perpendicular to the linear moving direction, the cooperation of the outer extension column 42 and the step 51 can provide a great constraint force resisting the closing of the driving member 5, thereby effectively ensuring that the circuit breaker is not accidentally closed during the insertion and extraction operation.

[0058] The above description is further detailed in combination with the specific preferred embodiments of the present application, and the specific implementation of the present application should not be limited to the description. For those skilled in the art to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as falling within the protection scope of the present application.

Claims

1. Plug-in circuit breaker comprising a housing (6), a push button mechanism and an operating mechanism (9), the push button mechanism comprising a push button (2), the push button (2) comprising a push button piece (21), the push button mechanism driving the operating mechanism (9) to perform closing / opening, characterized in that: The circuit breaker further comprises a linkage (3) and a locking member (4) arranged in the housing (6), the linkage (3) is provided with a contact protrusion (31); when the button (2) drives the circuit breaker to close, the button mechanism drives the contact protrusion (31) of the linkage (3) to extend out of the housing (6), and the button mechanism limits the linkage (3) so that the contact protrusion (31) cannot retreat into the housing; when the button (2) drives the circuit breaker to open, the contact protrusion (31) of the linkage (3) retreats into the housing; The locking member (4) is installed in the housing (6) by an elastic member, the locking member (4) is provided with a locking protrusion (41), when the circuit breaker is in the open state, the elastic member makes the locking protrusion (41) of the locking member (4) extend out of the housing (6), after an external force is applied to the locking member (4) to make it retract, the locking member (4) can be pushed back into the housing (6) by the external force.

2. Plug-in circuit breaker according to claim 1, characterized in that The button (2) further comprises an indicating member (22) arranged in the button member (21) for indicating the closing / opening state of the circuit breaker, when the button (2) drives the circuit breaker to open, the indicating member (22) operates to indicate the opening, and drives the linkage (3) to make the contact protrusion (31) retreat into the housing (6).

3. Plug-in circuit breaker according to claim 2, characterized in that: When the button (2) drives the circuit breaker to close, the indicating member (22) operates to indicate the closing, and drives the contact protrusion (31) of the linkage (3) to extend out of the housing (6).

4. The plug-in circuit breaker of claim 1, wherein: When the button (2) drives the circuit breaker to close, the button (2) drives the contact protrusion (31) of the linkage (3) to extend out of the housing (6).

5. The plug-in circuit breaker of claim 2, wherein: The linkage (3) is rotatably arranged on the housing (6), one end is provided with the contact protrusion (31), and the other end is provided with a linkage driving part (33) extending towards the button (2); The indicating member (22) comprises a rotating shaft (221), a display end face (223) and a driving protrusion (222), the display end face (223) is provided with an indicating part for indicating the opening / closing, the button member (21) is internally provided with a cavity type mounting hole (211), and the operating end face of the button member (21) is provided with an observation window (212) penetrating through the mounting hole (211); The indicating member (22) is mounted in the mounting hole (211) of the button member (21) by the rotating shaft (221) and can swing around the shaft, the swing drives the indicating part on the display end face (223) to move under the observation window (212), and the indicating part moving into the observation window (212) displays the corresponding opening / closing state; When the button (2) moves into the housing (6) to drive the circuit breaker to close, the driving protrusion (222) of the indicating member (22) cooperates with the linkage driving part (33) of the linkage (3) to make the indicating member (22) rotate, and the area of the indicating part on the display end face (223) corresponding to the closing state corresponds to the observation window (212); When the button (2) moves outwards to drive the circuit breaker to open, the driving boss (222) of the indicating member (22) cooperates with the linkage driving part (33) to rotate the indicating member (22), and the display end surface (223) of the indicating member (22) corresponds to the observation window (212) in the open state, and the driving boss (222) drives the linkage (3) to rotate through the linkage driving part (33) to make the abutting boss (31) of the linkage (3) retreat into the housing.

6. The plug-in circuit breaker of claim 5, wherein: When the button (2) moves inwards to drive the circuit breaker to close, the driving boss (222) of the indicating member (22) cooperates with the linkage driving part (33) to rotate the indicating member (22) and the linkage (3) at the same time, and the abutting boss (31) of the linkage (3) extends out of the housing (6).

7. The plug-in circuit breaker according to claim 2, characterized in that: The linkage (3) is provided with an unlocking part (34) cooperating with the locking member (4), and when the circuit breaker is opened, the button (2) moves outwards, the indicating member (22) drives the linkage (3) to rotate, and the unlocking part (34) of the linkage (3) applies force to the locking member (4) to make the locking boss (41) retreat into the housing (6).

8. The plug-in circuit breaker of claim 5, wherein: The driving boss (222) is provided with a left driven end (222b) and a right driven end (222a) at intervals, the linkage driving part (33) of the linkage (3) is bent to the left driven end (222b) and the right driven end (222a) on the side of the button (2), and when the button (2) moves inwards to drive the circuit breaker to close, the left driven end (222b) cooperates with the linkage driving part (33) of the linkage (3), and when the button (2) moves outwards, the right driven end (222a) cooperates with the linkage driving part (33) of the linkage (3).

9. The plug-in circuit breaker of claim 7, wherein: The button mechanism comprises a button (2), a connecting rod (7) and a driving member (5), the button (2) drives the driving member (5) to act through the connecting rod (7), the driving member (5) is arranged in the housing (6) and connected with the operating mechanism (9); the locking member (4) is installed in the housing (6) through a linear motion pair, and the linear motion direction is perpendicular to the installation and insertion direction of the circuit breaker, the locking member (4) comprises an outward extending column (42), when the circuit breaker is in the closed state, the elastic member makes the locking boss (41) of the locking member (4) extend out of the housing (6), and the outer side surface (52) of the driving member (5) cooperates with the outward extending column (42) of the locking member (4) to prevent the locking member (4) from retreating into the housing (6).

10. The plug-in circuit breaker of claim 7, wherein: The housing (6) is provided with a limiting hole (61), the abutting boss (31) of the linkage (3) and the locking boss (41) of the locking member (4) cooperate with the same limiting hole (61).

11. The plug-in circuit breaker of claim 1, wherein: The abutting boss (31) is a square boss, and the side surfaces on both sides of the square boss are perpendicular to the installation and insertion direction of the circuit breaker.

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