WO2022028139A1 - Mechanism assembly of pluggable circuit breaker - Google Patents

Abstract

A mechanism assembly of a pluggable circuit breaker, which is characterized in that the mechanism assembly (3) comprises an operating member (3a), wherein the operating member (3a) is connected to a contact supporting member (3c) by means of a connecting rod (3b); the operating member (3a) can rotate in a housing (1); in the process of rotating in the housing (1), the operating member (3a) can drive, by means of the connecting rod (3b), a moving contact (202) on the contact supporting member (3c) to be in contact with or separated from a corresponding static contact (201), to realize the on and off of a pluggable circuit breaker; and the contact supporting member (3c) is provided with a tripping execution mechanism (3f). A mechanism module of an existing plug-in miniature circuit breaker is redesigned, and by means of improvement in the structure of each of the connecting rod, a fixing catch, a jumping catch and a lock catch, the performance requirements of the plug-in miniature circuit breaker are met, the number of parts is reduced, and the difficulty of product assembly is also reduced, thereby reducing product costs and improving the reliability of product assembly.

Description

Mechanism components of pluggable circuit breakers technical field

The invention belongs to the field of low-voltage electrical technology, and specifically relates to a mechanism component of a plug-in circuit breaker.

Background technique

The circuit breakers are divided according to the installation method: there are plug-in, fixed and drawer types. The use of plug-in circuit breakers can effectively improve the safety of the electrical equipment industry. With the wide use of plug-in circuit breakers in various electrical equipment, In order to meet the installation needs of various electrical equipment, the structure of plug-in circuit breakers has also developed into various types. At present, in the layout of the existing traditional plug-in circuit breaker products in the installation position, the operation button is generally pressed to open the circuit. The circuit breaker is closed, the operation button of the circuit breaker bounces back to its original position after the operating force is removed, and the circuit breaker is disconnected when the button is pressed again.

Chinese patent ZL201721400674.6 discloses a plug-in miniature circuit breaker, which includes a casing, an outlet end, an inlet end, a button mechanism, an operating mechanism, an overload protection mechanism, an arc extinguishing mechanism, a short-circuit protection mechanism and a signal end. : The button mechanism is linked with the locking device and the fixed unlocking device. The plug-in miniature circuit breaker, the wiring can be directly inserted, and the operation of disconnection is simple and convenient; at the same time, the locking mechanism is improved, so that the circuit breaker cannot be closed at will outside the cabinet, but can be opened and closed freely in the cabinet. The circuit breaker cannot be pulled out from the cabinet by the components, and the circuit breaker can be easily taken out from the cabinet by pulling the button, which ensures the safety of the installation and use of the circuit breaker; the circuit breaker is suitable for a specific narrow space, and the circuit breaker can be rearranged by rearranging The internal structure of the circuit breaker solves the problem that the local temperature rise of the circuit breaker is too high. However, the plug-in circuit breaker has a large number of parts, a high product cost, and a complex assembly process, which leads to a high rework rate in the assembly process and reduces product assembly efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a mechanism component of the plug-in type circuit breaker, and redesign the mechanism module of the existing plug-in type circuit breaker in view of the defects of the above-mentioned existing plug-in type miniature circuit breaker having a large number of parts and complicated assembly process. , Through the improvement of connecting rod, fixed buckle, jump buckle and lock buckle structure, it can meet various performance requirements of plug-in miniature circuit breakers, while reducing the number of parts and the difficulty of product assembly, thereby reducing product cost and improving product assembly reliability.

Technical solutions

In order to achieve the above technical purpose, the mechanism component of the pluggable circuit breaker provided by the present invention is characterized in that: the mechanism component includes an operating member, the operating member is connected with the contact support member through a connecting rod, and the operating member is It can be rotated in the casing, and the operating member can drive the movable contact on the contact support member to contact or separate from the corresponding static contact through the connecting rod during the rotation process in the casing to realize the plug-in type circuit breaker On-off of the device, the contact support is equipped with a tripping actuator;

One end of the connecting rod connected with the operating member is also linked with a fixing buckle, and the fixing buckle is installed in the casing and can rotate. During the rotation process of the fixing buckle installed in the casing, the fixing buckle is closed. The locking bosses can be extended or retracted from the notch in the housing.

Further, the tripping actuator includes a jumping buckle and a locking buckle, the jumping buckle is rotatably mounted on the contact support member, and the end of the connecting rod connected to the contact support member is also linked to the contact support member. The jump buckle is rotatably mounted on the contact support member, and the lock buckle can lock and unlock the jump buckle so as to realize the locking and unlocking of the movement of the connecting rod. Locking and unlocking of the mechanism components.

Further, when the operating member drives the contact support member to move through the connecting rod, thereby driving the movable contact and the static contact to perform an opening and closing operation, the fixing buckle is not linked, and the fixed buckle is not linked. After the operating member is located at the opening position, it can continue to rotate counterclockwise to drive the fixing buckle to rotate counterclockwise through the connecting rod, so that the locking boss is retracted from the notch on the housing;

The fixing buckle is connected with a return spring, so that the fixing buckle has a clockwise rotation tendency so as to be reset.

Further, an operating member limiting boss is provided on the outer surface of the outer casing, which can limit the continuous clockwise rotation of the operating member after closing.

Further, a contact support member limiting boss is provided in the housing to limit the contact support member to continue to rotate counterclockwise after the switch is opened.

Further, the fixed buckle is installed in the housing to rotate coaxially with the operating member.

Further, the operating member includes an operating body, the operating body is provided with a rotation center hole 1, and the operating body is installed on a shaft in the housing through the rotation center hole 1 and can surround the shaft. Once rotated, one end of the operating body is provided with a connecting rod mounting hole, one end of the connecting rod extends from the connecting rod mounting hole into the linkage groove on the fixing buckle, and the other end of the operating body is a handle The handle end is forced to drive the operating body to rotate around the shaft to realize the opening and closing control of the switch device. The handle end is provided with a pull-out feature for installing the switch device from the switch. Pull out from the cabinet.

Further, the extraction feature is a protrusion provided on the handle end.

Further, the connecting rod mounting hole is a waist-shaped hole.

Further, a handle torsion spring is installed on the operation body, and the handle torsion spring is installed in the handle torsion spring installation groove on the operation body, so that the operation body has a clockwise rotation trend.

Further, the fixing buckle includes a fixing buckle body, and the bottom of the fixing buckle body is provided with a locking boss, and the locking boss can be extended or retracted from the notch on the casing during the rotation of the fixing buckle body. , the upper end of the fixing buckle body is provided with a spring mounting boss for hanging the return spring, the fixing buckle body is provided with a linkage groove for accommodating one end of the connecting rod passing through the connecting rod installation hole, the The upper end of the fixing buckle body is provided with a position limiting boss for limiting the movement stroke of the connecting rod.

Further, the fixed buckle body is provided with a second rotation center hole, and the fixed buckle body is installed on the second shaft in the housing through the second rotation center hole and can rotate around the second shaft.

Further, the linkage groove is an arc-shaped linkage groove.

Further, the contact support member includes a contact support body, the contact support body is provided with a rotation center hole 3, and the contact support body uses the rotation center hole 3 to install the shaft in the housing. Third, the contact support body is provided with a connecting rod groove, the other end of the connecting rod is installed in the connecting rod groove through the linkage hole on the jump buckle, and the contact support body is installed with a connecting rod groove. A moving contact accommodating groove, a torsion spring is mounted on the contact support body to abut the moving contact so that the moving contact is placed in the moving contact mounting groove, and after the moving contact and the stationary contact are in contact It can rotate relative to the contact support body in the movable contact mounting groove under the action of the torsion spring force.

Further, one end of the torsion spring sleeved on the torsion spring shaft of the contact support body presses against the movable contact.

Further, the jump buckle is rotatably mounted on the convex shaft on the contact support member, the lock buckle is rotatably mounted on the contact support member by using the lock buckle shaft, and the lock buckle includes A linkage arm and a locking arm, the locking arm is provided with a first step, the jumping buckle is provided with a second step corresponding to the first step, and the overlapping connection between the first step and the second step forms the lock buckle For the locking of the jump buckle, the linkage arm rotates counterclockwise under the action of an external force to drive the locking arm to rotate counterclockwise so that the first step is away from the second step to unlock the jump buckle.

Further, the lock catch is equipped with a lock catch reset torsion spring, which enables it to have a clockwise rotation and reset trend.

Further, one end of the return spring is hung on the spring mounting boss, and the other end is hung on the spring mounting boss on the contact support body.

Preferably, the return spring is a compression spring.

beneficial effect

The present invention provides a mechanism component of a plug-in type circuit breaker, which redesigns the existing plug-in type miniature circuit breaker mechanism module, and meets the requirements of the plug-in type miniature circuit breaker through the improvement of connecting rod, fixing buckle, tripping buckle and locking buckle structure. While meeting various performance requirements, it reduces the number of parts and the difficulty of product assembly, thereby reducing product costs and improving product assembly reliability.

Description of drawings

Accompanying drawing 1 is the schematic diagram that the mechanism component is in the state of opening in the embodiment of the present invention;

2 is a schematic structural diagram of an operating member in an embodiment of the present invention;

3 is a schematic diagram of the installation structure of the handle torsion spring in the embodiment of the present invention;

4 is a schematic structural diagram of a fixing buckle in an embodiment of the present invention;

5 is a schematic structural diagram of a contact support member in an embodiment of the present invention;

6a is a schematic structural diagram of a lock in an embodiment of the present invention;

Figure 6b is a schematic structural diagram of a jump buckle in an embodiment of the present invention;

7 is a schematic structural diagram of a moving contact in an embodiment of the present invention;

8 is a schematic diagram of the position of the contact support member limiting boss in the embodiment of the present invention;

9 is a schematic diagram of the mechanism assembly in the closed state in the embodiment of the present invention;

FIG. 10 is a schematic diagram of the mechanism component in the tripping state in the embodiment of the present invention;

FIG. 11 is a schematic diagram of the mechanism assembly in the pulled-out state according to the embodiment of the present invention;

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example

As shown in Figures 1, 9, 10 and 11, the mechanism assembly of the pluggable circuit breaker provided in this embodiment includes a housing 1, a contact system 2, and a mechanism assembly 3, and the contact system 2 includes a moving contact 202 and a static contact 201, the mechanism assembly 3 includes an operating member 3a, the operating member 3a is connected with the contact support member 3c through a connecting rod 3b, and the operating member 3a can rotate in the housing 1, as shown in the accompanying drawings As shown in Fig. 8, the outer surface of the housing 1 is provided with an operating member limiting boss 1g, which can limit the operating member 3a to continue to rotate clockwise after closing. During the rotation process of the operating member 3a in the housing 1, the movable contact 202 on the contact support member 3c can be driven by the connecting rod 3b to contact or separate from the corresponding static contact 201 to realize the plug-in disconnection. The housing 1 is provided with a contact support member limiting boss 1h, which can limit the contact support member 3c to continue to rotate counterclockwise after opening. A tripping actuator 3f is installed on the contact support 3c;

One end of the connecting rod 3b connected with the operating member 3a is also linked with a fixing buckle 3d, which is installed in the housing 1 and can be rotated. In this embodiment, the fixing buckle 3d is installed in the The casing 1 rotates coaxially with the operating member 3a. When the fixing buckle 3d is installed in the casing 1 and rotates, the locking boss 3d01 on the fixing buckle 3d can protrude or retract from the notch 1a on the casing 1 . The locking boss 3d01 on the fixing buckle 3d protrudes from the notch 1a on the casing 3a and corresponds to the notch on the switch installation cabinet to realize the locking installation of the switch device.

When the operating member 3a drives the contact support member 3c to move through the connecting rod 3b, thereby driving the movable contact 202 and the static contact 201 to perform opening and closing operations, the fixed buckle 3d is not linked. , the operating member 3a continues to rotate counterclockwise after the operating member 3a is located in the opening position, and the connecting rod 3b can drive the fixing buckle 3d to rotate counterclockwise, so that the locking boss 3d01 is retracted from the notch 1a on the housing 1;

The fixing buckle 3d is connected with a return spring 3e, which enables the fixing buckle 3d to have a clockwise rotation tendency to reset. In this embodiment, the return spring 3e is a compression spring. One end of the return spring 3e is hung on the spring mounting boss 3d0201, and the other end is hung on the spring mounting boss 3c0105 on the contact support body 3c01.

The tripping actuator 3f includes a jumper 3f01 and a lock 3f02, the jumper 3f01 is rotatably mounted on the contact support 3c, and the connecting rod 3b is connected to the contact support 3c. One end is also linked with the jump buckle 3f01, the lock buckle 3f02 is rotatably mounted on the contact support 3c, and the lock buckle 3f02 can lock and unlock the jump buckle 3f01 to realize the connection The locking and unlocking of the movement of the lever 3b realizes the locking and unlocking of the mechanism assembly 3 .

More specifically, as shown in Figures 1, 2 and 3, the operating member 3a includes an operating body 3a01, and the operating body 3a01 is provided with a rotation center hole 1 3a0101, and the operating body 3a01 rotates through the operating body 3a01. The central hole 3a0101 is installed on the shaft 1b in the casing 1 and can rotate around the shaft 1b. One end of the operating body 3a01 is provided with a connecting rod installation hole 3a0102. In this embodiment, the connecting rod is installed The hole 3a0102 is a waist-shaped hole. One end of the connecting rod 3b passes through the connecting rod mounting hole 3a0102 and protrudes into the linkage groove 3d0202 on the fixing buckle 3d, and the other end of the operating body 3a01 is the handle end 3a0103, and the handle end 3a0103 is located at the The operating end outside the casing 1, the handle end 3a0103 can drive the operating body 3a01 to rotate around the axis-1b to realize the opening and closing control of the switch device, the handle end 3a0103 is provided with a pull-out Feature 3a0103a is used to pull the switchgear out of the switch mounting cabinet. In this embodiment, the extraction feature 3a0103a is a protrusion provided on the handle end 3a0103. The operating body 3a01 is provided with a handle torsion spring 3a0104. The handle torsion spring 3a0104 is installed in the handle torsion spring mounting groove 3a0105 on the operating body 3a01 so that the operating body 3a01 has a clockwise rotation trend.

As shown in FIGS. 1 and 4 , the fixing buckle 3d includes a fixing buckle body 3d02, and a locking boss 3d01 is provided at the bottom of the fixing buckle body 3d02. The locking boss 3d01 rotates with the fixing buckle body 3d02 during the rotation process. A spring mounting boss 3d0201 is provided on the upper end of the fixing buckle body 3d02 for hanging the return spring 3e, and a linkage groove is provided on the fixing buckle body 3d02. 3d0202 is used for accommodating one end of the connecting rod 3b passing through the connecting rod mounting hole 3a0102. In this embodiment, the linkage groove 3d0202 is an arc-shaped linkage groove.

The upper end of the fixing buckle body 3d02 is provided with a position limiting boss 3d0203 for limiting the movement stroke of the connecting rod 3b. The fixing buckle body 3d02 is provided with a second rotation center hole 3d0204, and the fixing buckle body 3d02 is installed on the second shaft 1c in the housing 1 through the second rotation center hole 3d0204 and can rotate around the second shaft 1c. The second shaft 1c and the first shaft 1b realize that the fixing buckle 3d is mounted in the housing 1 and rotates coaxially with the operating member 3a.

As shown in FIGS. 1 , 5 and 7 , the contact support member 3c includes a contact support body 3c01, and the contact support body 3c01 is provided with a rotation center hole 3c02. The contact support body 3c01 utilizes the The rotation center hole 3c02 is installed on the shaft 31d in the housing 1, the contact support body 3c01 is provided with a connecting rod slot 3c0101, and the other end of the connecting rod 3b passes through the jumper 3f01. The linkage hole 3f0101 is installed in the connecting rod groove 3c0101. In this embodiment, the connecting rod groove 3c0101 is an arc-shaped groove. The movable contact 202 is pressed against the contact support body 3c01 so that the movable contact 202 is placed in the movable contact installation groove 3c0102, and the contact end of the movable contact 202 extends out of the movable contact Head Mounting Slot 3c0102. After the movable contact 202 and the stationary contact 201 are in contact, they can rotate relative to the contact support body 3c01 in the movable contact mounting groove 3c0102 under the force of the torsion spring 3c0103. In this embodiment, the torsion spring 3c0103 is sleeved on the upper end of the torsion spring shaft 3c0104 of the contact support body 3c01 to press against the movable contact 202 .

As shown in Figures 6a, 6b and 10, the jumper 3f01 is rotatably mounted on the protruding shaft 3c03 on the contact support 3c, and the lock 3f02 is rotatably mounted on the lock shaft 3f0201. On the contact support member 3c, the lock buckle 3f02 is equipped with a lock buckle reset torsion spring 3f0203, which can make it have a clockwise rotation and reset trend. In this embodiment, the lock buckle reset torsion spring 3f0203 is sleeved on the lock buckle. on axis 3f0201. As shown in FIG. 6a, the lock buckle 3f02 includes a linkage arm 3f0201 and a locking arm 3f0202. The locking arm 3f0202 is provided with a step 1 3f0202a. As shown in FIG. 6b, the jump buckle 3f01 is provided with The first step 3f0202a corresponds to the second step 3f01a, the overlapping of the first step 3f0202a and the second step 3f01a forms the locking of the jumper 3f01 by the lock 3f02, and the linkage arm 3f0201 is counterclockwise under the action of external force The rotation drives the locking arm 3f0202 to rotate counterclockwise, so that the first step 3f0202a is away from the second step 3f01a to unlock the jump buckle 3f01.

In this embodiment, the clockwise movement of the operating member causes the movable contact to move toward the closed state as shown in FIG. 9 , and the rotational force of the operating member is transmitted to the contact support member 3c through the connecting rod 3b, thereby driving the contact 202 to connect with the static state. The contact 201 is closed; after the moving contact 202 is in contact with the stationary contact 201, the mechanism components will continue to move. At this time, the moving contact 202 will no longer follow the contact support 3c, but will move around the moving contact The head 202 leans against the two arc edges of the contact support member 3c, and performs a rotary motion in the movable contact mounting groove 3c0102. At this time, the torsion spring 3c0103 provides the contact pressure required by the movable contact 202, and is used for Apply a leftward force to the moving contact 202 to maintain the balance of the force in the closed state; as shown in FIG. 1 , when the switch is opened, the contact support 3c relies on the restoring force of the return spring 3e until the contact supports The component 3c is against the limiting boss of the housing 1, and this time is the farthest point of the opening of the contact system 4, and the movable contact 202 also returns to the initial position;

The product can use the handle end to operate upward or downward to realize opening and closing conversion during closing and opening. When the switch needs to be pulled out of the switch installation cabinet by the operating member, the pull-out feature 3a0103a of the handle end can be simultaneously As the focus point of the hand, make the hand exert force to pull the switch out of the switch installation cabinet;

As shown in Figures 1 and 9, when the switch is in the opening and closing state, the fixed buckle 3d has no cooperative connection with the mechanism. When the switch is opened, the operating member 3a drives the connecting rod 3b to stay at the upper end of the linkage groove 3d0202. At the lower end, the connecting rod 3 can move in the linkage groove 3d0202. When the fixing buckle 3d does not move, the return spring 3e exerts force on the contact support member 3c to make it move in the direction of opening. When the product needs to be pulled out, the The operating member 3a is moved to the opening position, and then the operating member 3a is moved counterclockwise by applying force. At this time, the connecting rod 3b driven by the operating member 3a stays on the upper part of the fixing buckle 3d, and the operating member 3a continues to move counterclockwise to drive the connecting rod. 3b rod moves with it, then the connecting rod 3b will drive the fixing buckle 3d to move counterclockwise together, and then the locking boss 3d01 will rotate to the inside of the casing and rotate back, releasing the locking function of the switch cabinet and the casing 1 as shown in the attached figure 11, the product can be pulled out by using the pull-out feature 3a0103a of the handle end. Once the force on the operating member 3a is removed, the fixing buckle 3d will move clockwise under the action of the return spring 3e to extend out of the housing 1. on the notch 1a;

When the switch is assembled into the switch installation cabinet in place, it needs to go through the stage where the fixing buckle 3d is pressed into the casing 1 by the cabinet body. This stage is when the switch is not installed in place. The upper end of the fixing buckle body 3d02 is provided with a position limit boss 3d0203 cooperates with connecting rod 3b to prevent the transmission angle of the mechanism module from reaching the dead center position, so as to ensure that the product cannot be assembled in place, and the product cannot be closed. After it is in place, the locking boss 3d01 can reach the reserved notch position of the cabinet, so as to extend the cabinet again to lock the switch device and the cabinet;

As shown in FIG. 9 , when the circuit breaker is in the closed state, the overlapping of the first step 3f0202a and the second step 3f01a forms the locking of the locking buckle 3f02 to the tripping buckle 3f01, and the entire mechanism assembly 3 is reliable The ground is in the closed state, when a short-circuit current occurs in the circuit breaker, the latch 3f02 will rotate counterclockwise under the action of an external driving force to drive the locking arm 3f0202 to rotate counterclockwise to keep the step one 3f0202a away from the step The second 3f01a realizes the unlocking and tripping of the jumper 3f01 as shown in FIG. 10 . After the external driving force disappears, the lock buckle 3f02 will be rotated and reset clockwise under the action of the lock buckle reset torsion spring 3f0203.

In the description of this specification, description with reference to the terms "one embodiment," "example," "specific example," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention. in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-disclosed preferred embodiments of the present invention are provided only to help illustrate the present invention. The preferred embodiments do not exhaust all the details, nor do they limit the invention to only the described embodiments. Obviously, many modifications and variations are possible in light of the content of this specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is to be limited only by the claims and their full scope and equivalents.

Claims (19)

A mechanism assembly of a pluggable circuit breaker, characterized in that: the mechanism assembly (3) includes an operating member (3a), and the operating member (3a) is connected to a contact support member (3c) through a connecting rod (3b) , the operating member (3a) can be rotated in the casing (1), and the operating member (3a) can drive the contact support member ( 3c) The movable contact (202) on the corresponding static contact (201) contacts or separates to realize the on-off of the pluggable circuit breaker, and the contact support (3c) is equipped with a tripping actuator ( 3f); One end of the connecting rod (3b) connected with the operating member (3a) is further linked with a fixing buckle (3d), the fixing buckle (3d) is installed in the housing (1) and can be rotated, and the fixing buckle (3d) can rotate. (3d) During the rotation process of being installed in the casing (1), the locking boss (3d01) on the fixing buckle (3d) can protrude or retract from the notch (1a) on the casing (1). The mechanism assembly of a pluggable circuit breaker according to claim 1, characterized in that: the tripping actuator (3f) comprises a jumper (3f01) and a lock (3f02), and the jumper (3f01) can It is rotatably mounted on the contact support (3c), and the end of the connecting rod (3b) connected to the contact support (3c) is also linked to the jumper (3f01), and the lock (3f01). 3f02) is rotatably mounted on the contact support (3c), and the lock (3f02) can lock and unlock the jumper (3f01) so as to realize the movement of the connecting rod (3b). The locking and unlocking of the mechanism assembly (3) is achieved by locking and unlocking. The mechanism assembly of the pluggable circuit breaker according to claim 1, wherein the operating member (3a) drives the contact support member (3c) to move through the connecting rod (3b), thereby driving the During the opening and closing operation of the movable contact (202) and the stationary contact (201), the fixed buckle (3d) is not linked, and the operating member (3a) continues to rotate counterclockwise after it is in the opening position. The fixing buckle (3d) is driven by the connecting rod (3b) to rotate counterclockwise so that the locking boss (3d01) is retracted from the notch (1a) on the housing (1); The fixing buckle (3d) is connected with a return spring (3e), which enables the fixing buckle (3d) to have a clockwise rotation tendency to reset. The mechanism assembly of the pluggable circuit breaker according to claim 1, characterized in that: the outer surface of the casing (1) is provided with an operating member limiting boss (1g), which can limit the operating member (3a) from closing. Continue to turn clockwise after the brake. The mechanism assembly of the pluggable circuit breaker according to claim 1, characterized in that: the housing (1) is provided with a contact support member limiting boss (1h) capable of limiting the contact support member (3c) ) and continue to turn counterclockwise after opening. The mechanism assembly of the pluggable circuit breaker according to claim 1, characterized in that: the fixing buckle (3d) is installed in the casing (1) to rotate coaxially with the operating member (3a). The mechanism assembly of a pluggable circuit breaker according to claim 1, characterized in that: the operating member (3a) comprises an operating body (3a01), and the operating body (3a01) is provided with a rotation center hole 1 (3a0101). ), the operating body (3a01) is installed on the shaft one (1b) in the housing (1) through the rotation center hole one (3a0101) and can rotate around the shaft one (1b), the operation One end of the main body (3a01) is provided with a connecting rod mounting hole (3a0102), and one end of the connecting rod (3b) passes through the connecting rod mounting hole (3a0102) and protrudes into a linkage groove (3a0102) on the fixing buckle (3d). In 3d0202), the other end of the operating body (3a01) is the handle end (3a0103), and the handle end (3a0103) is forced to drive the operating body (3a01) to rotate around the axis one (1b) to achieve the For the opening and closing control of the switchgear, the handle end (3a0103) is provided with a pull-out feature (3a0103a) for pulling out the switchgear from the switch installation cabinet. The mechanism assembly of the pluggable circuit breaker according to claim 7, characterized in that: the extraction feature (3a0103a) is a protrusion provided on the handle end (3a0103). The mechanism assembly of the pluggable circuit breaker according to claim 7, wherein the connecting rod mounting hole (3a0102) is a waist-shaped hole. The mechanism assembly of the pluggable circuit breaker according to claim 7, characterized in that: a handle torsion spring (3a0104) is mounted on the operating body (3a01), and the handle torsion spring (3a0104) is mounted on the operating body The handle torsion spring installation groove (3a0105) on the (3a01) can make the operating body (3a01) have a clockwise rotation tendency. The mechanism assembly of the pluggable circuit breaker according to claim 1, characterized in that: the fixing buckle (3d) comprises a fixing buckle body (3d02), and the bottom of the fixing buckle body (3d02) is provided with a locking boss ( 3d01), the locking boss (3d01) can protrude or retract from the notch (1a) on the housing (3a) during the rotation process of the fixing buckle body (3d02), and the fixing buckle body (3d02) The upper end is provided with a spring mounting boss (3d0201) for hanging the return spring (3e), and the fixing buckle body (3d02) is provided with a linkage groove (3d0202) for accommodating the connecting rod mounting hole (3a0102) At one end of the connecting rod (3b) passing through, the upper end of the fixing buckle body (3d02) is provided with a position limiting boss (3d0203) for limiting the movement stroke of the connecting rod (3b). The mechanism assembly of the pluggable circuit breaker according to claim 11, characterized in that: the fixing buckle body (3d02) is provided with a second rotation center hole (3d0204), and the fixing buckle body (3d02) passes through the rotation center The second hole (3d0204) is mounted on the second shaft (1c) in the housing (1) and can rotate around the second shaft (1c). The mechanism assembly of the plug-in circuit breaker according to claim 7 or 11, characterized in that: the linkage groove (3d0202) is an arc-shaped linkage groove. The mechanism assembly of the pluggable circuit breaker according to claim 1, characterized in that: the contact support member (3c) comprises a contact support body (3c01), and the contact support body (3c01) ) is provided with a rotation center hole three (3c02), and the contact support body (3c01) is installed on the shaft three (1d) in the housing (1) by using the rotation center hole three (3c02). The contact support body (3c01) is provided with a connecting rod groove (3c0101), and the other end of the connecting rod (3b) is installed in the connecting rod groove (3f0101) through the linkage hole (3f0101) on the jumping buckle (3f01). 3c0101), a moving contact accommodating groove (3c0102) is installed on the contact support body (3c01), and a torsion spring (3c0103) is mounted on the contact support body (3c01) to abut the moving contact (202) The moving contact (202) is placed in the moving contact mounting groove (3c0102), and after the moving contact (202) is in contact with the stationary contact (201), the torsion spring (3c0103) can force the torsion spring (3c0103). Under the action, the movable contact mounting groove (3c0102) rotates relative to the contact support body (3c01). The mechanism assembly of the pluggable circuit breaker according to claim 14, characterized in that: the torsion spring (3c0103) is sleeved on the torsion spring shaft (3c0104) of the contact support body (3c01) and is pressed against one end of the torsion spring shaft (3c0104). the moving contact (202). The mechanism assembly of the pluggable circuit breaker according to claim 2, characterized in that: the jumper (3f01) is rotatably mounted on the protruding shaft (3c03) on the contact support (3c), The lock catch (3f02) is rotatably mounted on the contact support member (3c) by using a lock catch shaft (3f0201), and the lock catch (3f02) includes a linkage arm (3f0201) and a locking arm (3f0202), The locking arm (3f0202) is provided with a first step (3f0202a), the jump buckle (3f01) is provided with a second step (3f01a) corresponding to the first step (3f0202a), and the first step (3f0202a) is connected with the first step (3f0202a). The overlapping of the second step (3f01a) forms the locking of the jumper (3f01) by the lock (3f02), and the linkage arm (3f0201) rotates counterclockwise under the action of an external force to drive the locking arm (3f0202) ) counterclockwise to make the first step (3f0202a) away from the second step (3f01a) to unlock the jump buckle (3f01). The mechanism assembly of the pluggable circuit breaker according to claim 16, characterized in that: the lock catch (3f02) is provided with a lock catch return torsion spring (3f0203), which enables it to have a clockwise rotation and reset tendency. The mechanism assembly of the pluggable circuit breaker according to claim 3, characterized in that: one end of the return spring (3e) is hung on the spring mounting boss (3d0201), and the other end is hung on the contact support body (3d0201). 3c01) on the spring mounting boss (3c0105). The mechanism assembly of the pluggable circuit breaker according to claim 3 or 18, characterized in that: the return spring (3e) is a compression spring.

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