Wiring terminal plugging structure and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a wiring terminal plug-in structure and a circuit breaker, and the wiring terminal plug-in structure comprises a static terminal and a moving terminal. The static terminal comprises a first shell and a wiring unit arranged in the first shell, two opposite sides of the first shell are respectively provided with a wiring port and a terminal socket, and the wiring unit is provided with an elastic wire clamping part and a contact cavity; the elastic wire clamping part is used for clamping an external lead passing through the wiring port and is in conductive contact with the external lead; the moving terminal can pass through the terminal jack and can be conductively plugged in the contact cavity. The wiring terminal plugging structure is of a two-section structure, so that the use space required by the wiring terminal plugging structure can be greatly reduced, the manufacturing process is simplified, and the production cost is reduced. The wiring unit of the static terminal can clamp the external lead on one hand and can be connected with the internal movable terminal on the other hand, the manufacturing process and required materials can be simplified, and the wiring efficiency can be improved in the mode that the wiring unit and the external lead are elastically clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a wiring terminal plug-in structure and a circuit breaker. Background Art

[0002] At present, the plug-in structure of the terminal block of the drawer-type circuit breaker often adopts a three-stage structure, which includes a moving terminal structure, a transition terminal structure and a static terminal structure. The static terminal structure is connected to the external wiring on the one hand, and is conductively connected to the transition terminal structure through a soft wire on the other hand, and then plugged into the moving terminal structure through the transition terminal structure, finally realizing the conductive contact between the moving and static terminal structures. Since the transition terminal structure is added to realize the contact and separation between the moving and static terminal structures, the space required for the terminal block is greatly increased, and the process and production cost of making the transition terminal structure are also increased, resulting in the entire circuit breaker not only being larger in size and higher in cost. Moreover, the structure of the existing terminal itself is relatively complex, the production is difficult, and the operation is cumbersome when connecting with the lead wire, resulting in low efficiency during assembly.

[0003] Therefore, there is an urgent need for a terminal block plug-in structure and a circuit breaker to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a wiring terminal plug-in structure and a circuit breaker, which can greatly reduce the use space required for the wiring terminal plug-in structure, simplify the manufacturing process, reduce the production cost, and improve the assembly efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, a terminal plug-in structure is provided, comprising a static terminal and a movable terminal;

[0007] The static terminal comprises a first housing and a wiring unit arranged in the first housing, the first housing is provided with a wiring port and a terminal socket on opposite sides thereof, and the wiring unit has an elastic clamping portion and a contact cavity;

[0008] The elastic wire clamping part is used to clamp the external lead wire passing through the wiring port and is in conductive contact with the external lead wire; the movable terminal can pass through the terminal socket and can be conductively plugged into the contact cavity.

[0009] As a preferred solution of the wiring terminal plug-in structure provided by the utility model, the wiring unit includes a first static contact piece and two second static contact pieces arranged at intervals;

[0010] The first static contact piece comprises two fixed plates arranged at intervals, and the two second static contact pieces are located between the two fixed plates in a mirror-symmetrical manner;

[0011] The second static contact piece comprises a bonding plate, an elastic plate and the elastic wire clamping part which are bent and connected in sequence, the bonding plate is attached to the fixed plate, the elastic plate is opposite to the bonding plate, the elastic wire clamping part is provided with a wire clamping opening, the fixed plate is inserted into the wire clamping opening, and the external lead clamp is arranged between a side of the fixed plate facing away from the bonding plate and an inner wall of the wire clamping opening;

[0012] The wiring port and the clamping port are arranged in one-to-one correspondence, the first shell is provided with an operating port, an operating gap is formed between the elastic plates of the two second static contact pieces, and the operating port is directly opposite to the operating gap.

[0013] As a preferred solution of the terminal block plug-in structure provided by the utility model, the first static contact piece also includes a contact plate, which is bent and connected between the two fixed plates, and a bending portion is provided on the contact plate, and the bending portion is arranged on a side facing away from the second static contact piece to form the contact cavity.

[0014] As a preferred solution of the terminal block plug-in structure provided by the utility model, the first static contact piece is an integrated structure; and / or the second static contact piece is an integrated structure.

[0015] As a preferred solution of the plug-in structure of the wiring terminal provided by the utility model, the terminal socket and the contact cavity form a tapered mouth structure, and the size of the tapered mouth structure gradually decreases along the plug-in direction of the movable terminal;

[0016] One end of the movable terminal passing through the terminal socket is tapered in a gradually decreasing size along the plugging direction.

[0017] As a preferred solution of the plug-in structure of the terminal provided by the utility model, the contact cavity has two arc-shaped contact walls opposite to each other along the X direction; the terminal socket has two first guide walls opposite to each other along the X direction, and the two first guide walls gradually approach each other and tilt along the plug-in direction, and the angle is α; the plane where the two first guide walls are located is tangent to the two arc-shaped contact walls one by one, so as to form the tapered mouth structure;

[0018] The movable terminal comprises a second housing and a movable contact piece arranged on the second housing, a plug-in portion is convexly provided on the second housing, and the movable contact piece extends out of the plug-in portion; the movable contact piece comprises a first guide plate and a second guide plate opposite to each other in the X direction; the plug-in portion comprises a second guide wall and a third guide wall opposite to each other in the X direction and arranged at an angle β; the second guide wall and the first guide plate are in the same plane, and the third guide wall and the second guide plate are in the same plane; the angle β ≤ the angle α, the first guide plate and the second guide plate extend into the contact cavity, and the second guide wall and the third guide wall extend into the terminal socket;

[0019] The X direction is perpendicular to the plugging direction.

[0020] As a preferred solution of the terminal plug-in structure provided by the utility model, at least two third guide plates are convexly provided on the first housing and are spaced apart along the Y direction, and the sides of two adjacent third guide plates facing each other gradually approach each other and tilt along the plug-in direction to form a plug-in channel, and the plug-in channel and the terminal socket are sequentially arranged and face each other along the plug-in direction, and the plug-in portion is at least partially inserted into the plug-in channel;

[0021] The Y direction is perpendicular to both the X direction and the plugging direction.

[0022] As a preferred solution of the wiring terminal plug-in structure provided by the utility model, the movable terminal includes a second housing and a movable contact piece;

[0023] The second shell is provided with an insertion cavity, which includes a connected guide cavity and a limit cavity, and the cross-section of the guide cavity gradually decreases towards the limit cavity; the movable contact piece includes a connected insertion portion and a contact portion; the insertion portion is inserted through the guide cavity and limited in the limit cavity, and the contact portion extends out of the limit cavity and is plugged into and matched with the contact cavity.

[0024] As a preferred solution of the plug-in structure of the wiring terminal provided by the utility model, the cross-sectional shape of the inserting portion is consistent with the cross-sectional shape of the limiting cavity and both are non-circular.

[0025] As a preferred solution of the terminal plug-in structure provided by the utility model, a limiting protrusion and a limiting groove are provided on the inner wall of the limiting cavity at one end away from the guiding cavity;

[0026] The opposite sides of the insertion part are respectively provided with a step structure and a limiting spring sheet, and the limiting spring sheet extends obliquely in a direction away from the contact part; the step structure can be engaged with the limiting protrusion, and the limiting spring sheet can slide along the cavity wall of the limiting cavity and be clamped in the limiting clamping groove;

[0027] The limiting protrusion is close to the outer wall of the guiding cavity and the limiting groove is close to the inner wall of the guiding cavity to stop the inserting part in two opposite directions.

[0028] As a preferred solution of the plug-in structure of the wiring terminal provided by the utility model, the contact portion includes a connecting plate, an elastic abutting plate and a reinforcing plate;

[0029] The connecting plate includes a first plate segment and two second plate segments respectively arranged at both ends of the first plate segment, the first plate segment and the two second plate segments are connected to form a U-shaped structure and surround a receiving groove, and the first plate segment and the two second plate segments are both connected to the insertion portion;

[0030] The elastic abutment plate is bent and connected to the first plate segment and is opposite to the first plate segment, and both the elastic abutment plate and the first plate segment abut against the inner wall of the contact cavity;

[0031] The reinforcing plate is bent and connected to one end of the elastic abutting plate away from the first plate section, and the reinforcing plate extends into the accommodating groove and is located between the first plate section and the elastic abutting plate.

[0032] As a preferred solution of the wiring terminal plug-in structure provided by the utility model, the wiring terminal plug-in structure further includes a first mounting plate and a second mounting plate;

[0033] The first mounting plate is provided with a first cavity, a plurality of the static terminals are arranged side by side, and the plurality of static terminals are clamped in the first cavity;

[0034] The second mounting plate is provided with a second cavity, a plurality of the movable terminals are arranged side by side, and the plurality of movable terminals are clamped in the second cavity.

[0035] As a preferred solution of the terminal block plug-in structure provided by the utility model, the first shell includes a main shell frame and two cover plates, and the main shell frame is provided with installation cavities for installing the wiring unit on both sides along the arrangement direction of the static terminals, and the cover plates are detachably covered outside the installation cavities.

[0036] On the other hand, a circuit breaker is provided, comprising a body, a drawer seat and the terminal plug-in structure as described above, wherein the static terminal is fixedly arranged on the drawer seat, the movable terminal is movably connected to the body, the body is movably arranged on the drawer seat, and the body can move to a connection position relative to the movable terminal after the movable terminal is inserted into the contact cavity.

[0037] Beneficial effects of the utility model:

[0038] The utility model provides a wiring terminal plug-in structure and a circuit breaker including the wiring terminal plug-in structure, wherein the static terminal and the dynamic terminal are directly plugged in, and no additional transition terminal is required to realize the conductive contact between the dynamic terminal and the static terminal, that is, the wiring terminal plug-in structure is a two-stage structure, which can greatly reduce the space required for the wiring terminal plug-in structure, simplify the manufacturing process, and reduce the production cost. Moreover, the static terminal in the circuit breaker is provided with a wiring port for introducing an external lead on one side, and the external lead is clamped by the elastic clamping part of the wiring unit to realize a rapid conductive connection with the external lead, and the other side is conductively connected with the dynamic terminal inside the circuit breaker through the contact cavity of the wiring unit, that is, the wiring unit of the static terminal can quickly clamp and fix the external lead on the one hand, and can be connected with the internal dynamic terminal on the other hand, which can simplify the manufacturing process and the required materials, reduce the production difficulty, and the way of elastically clamping the wiring unit and the external lead can improve the wiring efficiency, thereby accelerating the assembly speed of the entire circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a drawer-type circuit breaker in the prior art;

[0040] Figure 2 It is a schematic diagram of a circuit breaker body provided by a specific embodiment of the utility model when it is in a separated position;

[0041] Figure 3 It is a schematic diagram of a circuit breaker terminal plug-in structure provided by a specific embodiment of the utility model;

[0042] Figure 4 This is a first schematic diagram of a static terminal and a dynamic terminal after being plugged in according to a specific embodiment of the utility model;

[0043] Figure 5 It is an exploded schematic diagram of the static terminal and the dynamic terminal provided by the specific implementation mode of the utility model;

[0044] Figure 6 It is an exploded schematic diagram of a static terminal provided in a specific embodiment of the utility model;

[0045] Figure 7 It is a schematic diagram of a wiring unit of a static terminal provided in a specific embodiment of the utility model;

[0046] Figure 8 This is a second schematic diagram of a static terminal and a dynamic terminal after being plugged in according to a specific embodiment of the utility model;

[0047] Fig. 9 It is an axonometric diagram of a movable terminal provided in a specific embodiment of the utility model;

[0048] Fig.10The assembly process of the movable contact piece and the second housing provided by the specific embodiment of the utility model is Figure 1 ;

[0049] Fig.11 The assembly process of the movable contact piece and the second housing provided by the specific embodiment of the utility model is Figure 2 ;

[0050] Fig.12 It is a structural schematic diagram of a dynamic contact piece provided by a specific embodiment of the utility model;

[0051] Fig.13 It is a plan view of the dynamic and static terminals when the circuit breaker body provided by the specific embodiment of the utility model is in the separated position;

[0052] Fig.14 It is a first view of the dynamic and static terminals when the circuit breaker body provided by the specific embodiment of the utility model is in the test position;

[0053] Fig.15 It is a second view of the dynamic and static terminals when the circuit breaker body provided by the specific embodiment of the utility model is in the test position;

[0054] Fig.16 It is a schematic diagram of a circuit breaker body provided by a specific embodiment of the utility model when it is in a connection position;

[0055] Fig.17 yes Fig.16 A partial view of the .

[0056] Figure 1 middle:

[0057] 10. Drawer seat structure; 20. Main body structure; 30. Moving terminal structure; 40. Transition terminal structure; 50. Static terminal structure; 60. Soft wire.

[0058] Figures 2 to 17 middle:

[0059] 100, body; 200, drawer seat; 300, terminal plug-in structure;

[0060] 1. Static terminal; 2. Moving terminal; 3. First mounting plate; 4. Second mounting plate; 5. Transmission bracket; 6. Elastic member;

[0061] 11. first housing; 12. wiring unit;

[0062] 111. main shell frame; 112. cover plate; 113. third guide plate; 114. plug-in channel;

[0063] 1110, installation cavity; 1111, wiring port; 1112, terminal socket; 1112a, first guide wall; 1113, operation port; 1114, positioning hole;

[0064] 1121, positioning column; 1131, fourth guide wall;

[0065] 121. first static contact piece; 122. second static contact piece; 123. operating gap;

[0066] 1210, contact cavity; 1210a, arc-shaped contact wall; 1211, fixing plate; 1211a, plug plate; 1212, contact plate; 12121, bending portion; 1214, first card slot;

[0067] 1221, laminating plate; 1222, elastic plate; 1223, elastic clamping part; 12231, clamping opening; 1224, arc-shaped transition plate; 1225, second clamping slot;

[0068] 21. second housing; 22. moving contact piece;

[0069] 211, plug-in portion; 212, limiting rib; 213, plug-in cavity;

[0070] 2111, second guide wall; 2112, third guide wall; 2113, fifth guide wall;

[0071] 2131, guide cavity; 2131a, first straight wall; 2131b, guide oblique wall; 2132, limit cavity; 2132a, second straight wall; 2133, limit protrusion; 2133a, stop convex surface; 2134, limit slot; 2134a, stop inner wall;

[0072] 221, insertion portion; 222, contact portion; 223, wiring portion;

[0073] 2211, step structure; 2212, limiting spring piece;

[0074] 2221, connecting plate; 2221a, first plate segment; 2221b, second plate segment; 2222, first guide plate; 2223, second guide plate; 2224, elastic abutment plate; 2225, reinforcing plate;

[0075] 2231, riveted interface; 2232, riveted plate;

[0076] 31. first cavity; 32. first clamping groove; 33. limiting flange; 331. positioning groove;

[0077] 41. second cavity; 42. second clamping groove; 43. sliding column; 44. positioning protrusion;

[0078] 51, guide hole; 511, first hole section; 512, second hole section. DETAILED DESCRIPTION

[0079] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0080] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0082] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0083] like Figure 1As shown, the drawer-type circuit breaker in the prior art includes a drawer seat structure 10 and a main body structure 20 disposed in the drawer seat structure 10, and the main body structure 20 is shaken in and out to realize the on and off of the main circuit. A wiring terminal is arranged between the main body structure 20 and the drawer seat structure 10, and the wiring terminal includes a moving terminal structure 30, a transition terminal structure 40 and a static terminal structure 50. The moving terminal structure 30 is fixedly arranged on the main body structure 20 and always remains relatively still with the main body structure 20. The transition terminal structure 40 can be arranged on the drawer seat structure 10 to move up and down and forward and backward. The static terminal structure 50 is fixedly arranged on the drawer seat structure 10. The static terminal structure 50 and the transition terminal structure 40 are connected by a soft wire 60, and the static terminal structure 50 is used to realize the connection with the external wiring. During the movement of the main body structure 20 from the separation position to the test position, the transition terminal structure 40 first moves downward to complete the plug-in action with the movable terminal structure 30; during the movement of the main body structure 20 from the test position to the connection position, the transition terminal structure 40 and the movable terminal structure 30 move forward together with the main body structure 20 until they reach the connection position and stop.

[0084] The wiring terminal plug-in structure of the above-mentioned drawer-type circuit breaker often adopts a three-section structure, which includes a moving terminal structure 30, a transition terminal structure 40 and a static terminal structure 50. The static terminal structure 50 is connected to the external wiring on the one hand, and is conductively connected to the transition terminal structure 40 through a soft wire 60 on the other hand. The transition terminal structure 40 is then plugged into the moving terminal structure 30 to finally achieve conductive contact between the moving and static terminal structures. Since the transition terminal structure 40 is added to achieve contact and separation between the moving and static terminal structures, the space required for the wiring terminal is greatly increased, and the process and production cost of making the transition terminal structure 40 are also increased, resulting in the entire circuit breaker not only being larger in size and higher in cost. Moreover, the existing terminal itself has a relatively complex structure, is difficult to produce, and is cumbersome to operate when connected to the lead wire, resulting in low efficiency during assembly.

[0085] Based on the above problems, Figure 2 As shown, this embodiment provides a circuit breaker, in particular a drawer-type circuit breaker, which includes a body 100, a drawer seat 200, and a terminal plug-in structure 300. The body 100 is movably arranged in the drawer seat 200, and can be moved out of the drawer seat 200 to disconnect the main circuit, or moved into the drawer seat 200 to connect the main circuit. When the body 100 enters the drawer seat 200, the terminal plug-in structure 300 changes from a separated state to a conductive contact state.

[0086] Combination Figure 3 and Figure 4 The terminal plug-in structure 300 includes a static terminal 1, a movable terminal 2, a first mounting plate 3, and a second mounting plate 4.

[0087] The static terminal 1 includes a first housing 11 and a wiring unit 12 installed in the first housing 11. The first housing 11 is made of plastic material, and the wiring unit 12 is made of metal material, such as copper material, so that the wiring unit 12 has good electrical conductivity. The moving terminal 2 includes a second housing 21 and a moving contact piece 22 installed on the second housing 21. The second housing 21 is made of plastic material, and the moving contact piece 22 is made of metal material, such as copper material, so that the moving contact piece 22 has good electrical conductivity.

[0088] The first mounting plate 3 is fixedly connected to the drawer seat 200 and is used to mount the static terminal 1 so that the static terminal 1 is fixed relative to the drawer seat 200. A first cavity 31 is provided on the first mounting plate 3, and multiple static terminals 1 are arranged side by side. Multiple static terminals 1 are clamped in the first cavity 31 to achieve detachable installation of multiple static terminals 1. Furthermore, multiple first clamping grooves 32 facing each other are provided on two opposite inner walls of the first cavity 31, and opposite sides of the first housing 11 of the static terminal 1 are clamped in the facing first clamping grooves 32.

[0089] The second mounting plate 4 is movably connected to the body 100 and is used to mount the movable terminal 2 so that the movable terminal 2 and the body 100 can move relative to each other. A second cavity 41 is provided on the second mounting plate 4, and a plurality of movable terminals 2 are arranged side by side. The plurality of movable terminals 2 are clamped in the second cavity 41 to realize the detachable installation of the plurality of movable terminals 2. The plurality of movable terminals 2 and the plurality of static terminals 1 are opposite to each other and can be separably plugged in to realize the on-off of the circuit. Furthermore, a plurality of second clamping grooves 42 opposite to each other are provided on the opposite inner walls of the second cavity 41, and the opposite sides of the second housing 21 of the movable terminal 2 are clamped in the opposite second clamping grooves 42.

[0090] In this embodiment, for the sake of convenience, the moving direction of the body 100 relative to the drawer seat 200 is set as the X direction, the arrangement direction of the multiple static terminals 1 and the multiple movable terminals 2 is set as the Y direction, and the height direction of the circuit breaker is set as the Z direction. The X direction, the Y direction and the Z direction are perpendicular to each other. Further, Figure 2 and Figure 3 The arrow pointing to the Z direction is defined as the positive Z direction, and the opposite direction is defined as the negative Z direction. When the movable terminal 2 and the static terminal 1 are plugged in, the static terminal 1 always remains stationary, and the movable terminal 2 can move along the positive Z direction to be plugged in with the static terminal 1. When separated, the movable terminal 2 moves along the negative Z direction.

[0091] See also Figure 4 , Figure 5 as well as Figure 6The first housing 11 is provided with a wiring port 1111 and a terminal socket 1112 on opposite sides along the Z direction, and the wiring unit 12 has an elastic clamping portion 1223 and a contact cavity 1210. The external lead from the client passes through the wiring port 1111 and is clamped and fixed by the elastic clamping portion 1223, so as to realize the conductive contact between the external lead and the wiring unit 12. The movable terminal 2 can pass through the terminal socket 1112 along the Z direction and be plugged into the contact cavity 1210, and be in conductive contact with the inner wall of the contact cavity 1210, so as to realize the conductive plug-in of the movable terminal 2 and the static terminal 1.

[0092] Specifically, during the process of the body 100 entering the drawer seat 200 along the X direction, the static terminal 1 fixed on the drawer seat 200 remains stationary, and the dynamic terminal 2 installed on the body 100 can pass through the terminal socket 1112 on the first shell 11 of the static terminal 1 along the Z direction and be clamped in the contact cavity 1210, completing the conductive connection between the dynamic terminal 2 and the wiring unit 12 of the static terminal 1. At this time, the body 100 reaches the test position (corresponding to the position where the dynamic terminal 2 and the static terminal 1 have just completed the plug-in). Afterwards, since the dynamic terminal 2 has been clamped in the contact cavity 1210, it no longer moves and remains stationary with the static terminal 1. In this embodiment, the body 100 and the dynamic terminal 2 are movably connected, and it can continue to move relative to the dynamic terminal 2 along the X direction until it reaches the connection position. During this period, the dynamic and static terminals 1 can ensure contact stability because they remain stationary. The terminal plug-in structure 300 can realize the stationary state of the moving terminal 2 and the static terminal 1 in the stage of "test position-connection position" without additionally setting up transition terminals, which can greatly reduce the space required for the terminal plug-in structure 300, simplify the manufacturing process, and reduce the production cost. In addition, the static terminal 1 in the circuit breaker has a wiring port 1111 for introducing an external lead wire on one side, and the external lead wire is clamped and fixed by the elastic clamping part 1223 of the wiring unit 12 to achieve a rapid conductive connection with the external lead wire, and the other side is conductively connected to the moving terminal 2 inside the circuit breaker through the contact cavity 1210 of the wiring unit 12, that is, the wiring unit 12 of the static terminal 1 can quickly clamp and fix the external lead wire on the one hand, and can be connected to the internal moving terminal 2 on the other hand, which can simplify the manufacturing process and required materials.

[0093] like Figure 6As shown, the first housing 11 includes a main housing frame 111 and two cover plates 112. Both sides of the main housing frame 111 along the arrangement direction of the static terminal 1 (i.e., the Y direction) are provided with installation cavities 1110 for installing the wiring unit 12. The two cover plates 112 are detachably covered on the outside of the corresponding installation cavities 1110, which is convenient for the disassembly, assembly and replacement of the wiring unit 12. The installation cavities 1110 for installing the wiring unit 12 are arranged on both sides of the first housing 11, which can increase the number of wiring units 12 in a single static terminal 1, realize the modular design of the static terminal 1, reduce the total number of parts of the circuit breaker, and improve the assembly efficiency. Furthermore, each installation cavity 1110 has two cavity positions, and each of the two cavity positions is installed with a wiring unit 12, and each static terminal 1 contains four wiring units 12. Each wiring unit 12 corresponds to two wiring ports 1111, so each main frame 111 is provided with eight wiring ports 1111; each wiring unit 12 corresponds to one terminal socket 1112, so each main frame 111 is provided with four terminal sockets 1112. Of course, only one wiring unit 12 or more than two wiring units 12 may be provided in each installation cavity 1110.

[0094] See also Figure 6 A plurality of positioning holes 1114 are provided on opposite sides of the main shell frame 111 along the Y direction, and a plurality of positioning columns 1121 are protruding from the side of each cover plate 112 facing the main shell frame 111. The plurality of positioning columns 1121 correspond to and are plugged into the plurality of positioning holes 1114 one by one, so that the cover plate 112 can be detachably installed on the main shell frame 111, which is convenient to operate and firmly connected.

[0095] like Figure 6 and Figure 7As shown, the wiring unit 12 includes a first static contact piece 121 and two second static contact pieces 122 arranged at intervals. The first static contact piece 121 and the second static contact piece 122 are both made of metal, such as copper. The first static contact piece 121 includes two fixed plates 1211 arranged at intervals, and the two second static contact pieces 122 are located between the two fixed plates 1211 in a mirror-symmetrical manner. The second static contact piece 122 includes a bonding plate 1221, an elastic plate 1222 and an elastic clamping portion 1223 that are bent and connected in sequence. The bonding plate 1221 is attached to the inner side of the fixed plate 1211, and the elastic plate 1222 is opposite to the bonding plate 1221 and there is a gap, so that the elastic plate 1222 has elastic deformation ability. One end of the elastic plate 1222 away from the bonding plate 1221 extends toward the fixed plate 1211 to form an elastic wire clamping portion 1223, and a wire clamping opening 12231 is provided on the elastic wire clamping portion 1223. The fixed plate 1211 is inserted into the wire clamping opening 12231. Under the elastic force of the elastic plate 1222, the elastic wire clamping portion 1223 is hooked on the fixed plate 1211 through the inner wall of the wire clamping opening 12231 and has a self-locking function. The elastic plate 1222 is pushed toward the direction close to the bonding plate 1221, so that an opening is formed between the inner wall of the wire clamping opening 12231 and the side of the fixed plate 1211 facing away from the bonding plate 1221; the external lead introduced into the wiring opening 1111 is passed through the opening and the elastic plate 1222 is released, so that the external lead can be clamped between the side of the fixed plate 1211 facing away from the bonding plate 1221 and the inner wall of the wire clamping opening 12231, thereby clamping and fixing the external lead, and the wiring operation is convenient and quick.

[0096] The two second static contact pieces 122 inside the fixing plate 1211 each have a wire clamping opening 12231, which is arranged corresponding to the two wiring openings 1111 on the main housing 111. Figure 4 , Figure 6 as well as Figure 7 , an operating port 1113 is provided on the main frame 111 corresponding to each wiring unit 12. Since the two second static contact pieces 122 are mirror-symmetrical, the elastic plates 1222 of the two second static contact pieces 122 push in opposite directions during wiring, and an operating gap 123 is formed between the elastic plates 1222 of the two second static contact pieces 122. The operating port 1113 is directly opposite to the operating gap 123. During wiring, the operating tool extends into the operating gap 123 between the two elastic plates 1222 through the operating port 1113, and the operating tool is rotated so that the two sides of the tool push against the two elastic plates 1222 respectively, so that an opening for clamping and fixing the external lead is formed between the inner wall of the clamping port 12231 and the fixing plate 1211. After the tool is rotated in the opposite direction, the elastic plate 1222 recovers its deformation, and the external lead is clamped and fixed.

[0097] Furthermore, the elastic plate 1222 and the elastic clamping portion 1223 are connected by an arc-shaped transition plate 1224. On the one hand, this makes the transition between the elastic plate 1222 and the elastic clamping portion 1223 smoother. On the other hand, the operating tool pushes the arc-shaped transition plate 1224 to elastically deform the elastic plate 1222. When pushing, the elastic plate 1222 is more stable due to the contact with the arc surface of the arc-shaped transition plate 1224, and scratches are avoided.

[0098] See also Figure 7 The first static contact piece 121 also includes a contact plate 1212, which is bent and connected between the two fixed plates 1211, and forms a U-shaped structure with the two fixed plates 1211. The contact plate 1212 is integrally bent to form a bending portion 12121, which is located between the two second static contact pieces 122. The bending portion 12121 is arranged on the side facing away from the second static contact piece 122 to form a contact cavity 1210 for plugging in the moving terminal 2. The cooperation between the first static contact piece 121 and the second static contact piece 122 not only realizes the clamping and fixing of the external lead wire, but also forms the contact cavity 1210 through the bending portion 12121, so that the wiring unit 12 can be used for both external wiring and plugging in with the internal moving terminal 2. It occupies a small space, has a simple manufacturing process, effectively reduces the number of parts, and realizes material saving.

[0099] See also Figure 4 and Figure 7 The fixing plate 1211 includes a straight plate and a bent plug plate 1211a, and the plug plate 1211a is connected to the contact plate 1212 through the straight plate. A limited slot is set in the installation cavity 1110, and the plug plate 1211a is clamped in the limited slot, so that the first static contact piece 121 is firmly installed in the main shell frame 111. Furthermore, the width of the plug plate 1211a is smaller than the width of the straight plate, so that a first clamping groove 1214 is formed on both sides of the straight plate along the width direction. A second clamping groove 1225 is set on both sides of the bonding plate 1221 of the second static contact piece 122 along the width direction. The elastic wire clamping part 1223 is sleeved on the outside of the plug-in plate 1211a through the wire clamping opening 12231, and is engaged with the first card slot 1214 and the second card slot 1225. The groove walls of the first card slot 1214 and the second card slot 1225 can limit the deformation of the elastic wire clamping part 1223 toward the contact plate 1212, ensuring that an opening for clamping the external lead can be formed on the outer side of the fixed plate 1211.

[0100] Preferably, the first static contact piece 121 and the second static contact piece 122 are both of an integrated structure, that is, both are integrally formed and have high strength. In particular, the integrally formed second static contact piece 122 has high elasticity and is not easy to lose elasticity after multiple deformations, ensuring that the external lead can be stably clamped. One first static contact piece 121 can be used for wiring at two wiring ports 1111, and defines a contact cavity 1210 for plugging with the moving terminal 2.

[0101] In this embodiment, see Figure 4 and Figure 5 The terminal socket 1112 and the contact cavity 1210 form a tapered mouth structure, and the size of the tapered mouth structure gradually decreases along the plug-in direction of the movable terminal 2 (i.e., the positive Z direction); one end of the movable terminal 2 passing through the terminal socket 1112 is tapered in size along the plug-in direction, and this end has a certain fault tolerance when plugged into the above-mentioned tapered mouth structure. Even if the two are slightly offset, the plug-in of the movable terminal 2 and the contact cavity 1210 can be smoothly achieved.

[0102] For more details, see Figure 4 and Figure 5 , the contact cavity 1210 has two arc-shaped contact walls 1210a opposite to each other along the X direction; the terminal socket 1112 has two first guide walls 1112a opposite to each other along the X direction, and the two first guide walls 1112a gradually approach each other and tilt along the plug-in direction, and the angle is α; the plane where the two first guide walls 1112a are located is tangent to the two arc-shaped contact walls 1210a one by one to form the above-mentioned tapered mouth structure. The arc-shaped contact wall 1210a is used for conductive contact with the moving contact piece 22 of the moving terminal 2, and while playing a guiding role, it can avoid scratching the moving terminal 2 during repeated plug-in. The design method of the first guide wall 1112a being tangent to the arc-shaped contact wall 1210a ensures that the moving terminal 2 will not be blocked by the arc-shaped contact wall 1210a when passing through the plug-in port into the contact cavity 1210, making the plug-in process smoother.

[0103] See also Figure 4 and Figure 5, a plug-in portion 211 is convexly provided on the second housing 21 of the movable terminal 2, and the movable contact piece 22 extends out of the plug-in portion 211 to make conductive contact with the contact cavity 1210; the portion of the movable contact piece 22 extending out of the plug-in portion 211 includes a first guide plate 2222 and a second guide plate 2223 opposite to each other in the X direction; the plug-in portion 211 has a second guide wall 2111 and a third guide wall 2112 opposite to each other in the X direction and at an angle of β. When the movable contact piece 22 and the contact cavity 1210 are plugged in, the first guide plate 2222 and the second guide plate 2223 extend into the contact cavity 1210, and the second guide wall 2111 and the third guide wall 2112 extend into the terminal socket 1112. The second guide wall 2111 and the first guide plate 2222 are in the same plane, and the third guide wall 2112 and the second guide plate 2223 are in the same plane. Such a design enables the plug-in portion 211 and the movable contact piece 22 to form a smoother cone, thereby improving the smoothness of plugging.

[0104] The above-mentioned angle β≤angle α can increase the tolerance space during plugging, so that the movable contact piece 22 can be more smoothly inserted into the contact cavity 1210. In addition, during the plugging process, the second guide wall 2111 and the third guide wall 2112 opposite to each other in the X direction cooperate with the two first guide walls 1112a respectively, and the first guide plate 2222 and the second guide plate 2223 cooperate with the two arc-shaped contact walls 1210a respectively, so as to achieve fine adjustment of the position of the movable terminal 2 in the X direction, so that the movable contact piece 22 can be plugged directly into the contact cavity 1210 in the X direction.

[0105] See also Figure 8 At least two third guide plates 113 spaced apart along the Y direction are convexly provided at the bottom of the main frame 111 of the first shell 11, and the sides of the two adjacent third guide plates 113 facing each other are fourth guide walls 1131, and the two fourth guide walls 1131 gradually approach each other and tilt along the plug-in direction (i.e., the positive Z direction) to form a tapered plug-in channel 114, and the plug-in channel 114 and the terminal socket 1112 are sequentially arranged and opposite to each other along the plug-in direction, and the plug-in portion 211 is at least partially inserted into the plug-in channel 114, and the movable contact piece 22 passes through the plug-in channel 114 and enters the terminal socket 1112, and is finally inserted into the contact cavity 1210.

[0106] Furthermore, the plug-in portion 211 is provided with fifth guide walls 2113 on opposite sides along the Y direction, and the fifth guide walls 2113 on both sides gradually approach each other and tilt along the positive Z direction to form a tapered structure. In the process of inserting the plug-in portion 211 into the main housing 111, the design of the fourth guide wall 1131 and the fifth guide wall 2113 not only improves the plug-in fault tolerance rate, but also can fine-tune the position of the movable terminal 2 along the Y direction through the sliding fit of the two, so that the movable contact piece 22 is plugged in with the contact cavity 1210 in the Y direction.

[0107] See also Fig. 9 The second housing 21 is provided with a limiting rib 212, which includes a cross-arranged transverse rib and a vertical rib. The limiting rib 212 also has inclined surfaces on both sides along the Y direction, and the inclined surfaces are in the same plane as the fifth guide wall 2113, which also play a plug-in guide role. Moreover, the limiting rib 212 is inserted between the two third guide plates 113, and works together with the third guide plates 113 to insulate and separate the two adjacent moving contact pieces 22.

[0108] In this embodiment, see Fig. 9 The movable terminal 2 is provided with two groups of plug-in parts 211 along the Y direction, each group includes two plug-in parts 211 spaced apart along the X direction, and a movable contact piece 22 extends from each plug-in part 211, corresponding to the four wiring units 12 on the static terminal 1 one by one. Figure 8 Three third guide plates 113 are disposed at the bottom of each main housing frame 111 to form two plug-in channels 114 for correspondingly plugging in two groups of plug-in portions 211 and the moving contact pieces 22 .

[0109] like Fig.10 and Fig.11 As shown, the movable contact piece 22 is inserted into the second housing 21, and its insertion direction is the positive Z direction. A plug-in cavity 213 is provided on the second housing 21 corresponding to each movable contact piece 22, and the plug-in cavity 213 includes a connected guide cavity 2131 and a limit cavity 2132. The cross section of the guide cavity 2131 gradually decreases toward the direction close to the limit cavity 2132, and the whole is conical. The movable contact piece 22 includes a connected insertion portion 221 and a contact portion 222; the insertion portion 221 is inserted into the limit cavity 2132 through the guide cavity 2131 and is limited in the limit cavity 2132, and the contact portion 222 extends out of the limit cavity 2132 and is plugged and matched with the contact cavity 1210. By providing a guide cavity 2131 with a variable cross-section, the movable contact piece 22 can be inserted into the plug-in cavity 213 more smoothly, thereby improving the assembly efficiency of the movable terminal 2. The insertion portion 221 can be limited in the limit cavity 2132 to ensure the assembly stability of the movable contact piece 22.

[0110] In this embodiment, the cross-sectional shape of the inserting portion 221 is consistent with the cross-sectional shape of the limiting cavity 2132 and both are non-circular, which can prevent the inserting portion 221 from rotating in the limiting cavity 2132 .

[0111] For example, see Fig.10 and Fig.11The cavity wall of the guide cavity 2131 includes a first straight wall 2131a and a plurality of guide oblique walls 2131b connected end to end in sequence, and the guide oblique walls 2131b are arranged obliquely relative to the first straight wall 2131a. The cavity wall of the limiting cavity 2132 includes at least one second straight wall 2132a, and the second straight wall 2132a and the first straight wall 2131a extend in the same direction, and at least one second straight wall 2132a and the first straight wall 2131a are in the same plane. The movable contact piece 22 slides along the first straight wall 2131a and is inserted into the limiting cavity 2132. Since the first straight wall 2131a and the second straight wall 2132a are connected in the same plane, the movable contact piece 22 slides along the plane and is inserted into the plug-in cavity 213, and the assembly process is smoother and more stable.

[0112] In this embodiment, the guide cavity 2131 has four cavity walls, which include a first straight wall 2131a and three guiding oblique walls 2131b, forming a tapered opening for the insertion portion 221 to pass through. The cavity wall of the limiting cavity 2132 includes a plurality of second straight walls 2132a connected end to end in sequence, and the outer peripheral shape of the insertion portion 221 is consistent with the cavity wall of the limiting cavity 2132, which plays an anti-rotation role. Specifically, the cavity wall of the limiting cavity 2132 includes four second straight walls 2132a, whose cross-section is square, and the cross-section of the insertion portion 221 is also square, which effectively prevents the movable contact piece 22 from rotating after assembly.

[0113] See also Fig.10 A limiting protrusion 2133 and a limiting groove 2134 are provided on the inner wall of the limiting cavity 2132 at one end away from the guiding cavity 2131. The limiting protrusion 2133 and the limiting groove 2134 are specifically provided on two opposite second straight walls 2132a. Fig.10 and Fig.12 , the opposite sides of the insertion part 221 are respectively provided with a step structure 2211 and a limiting spring piece 2212, and the limiting spring piece 2212 extends obliquely in a direction away from the contact part 222; the step structure 2211 can be engaged with the limiting protrusion 2133, and the limiting spring piece 2212 can slide along the cavity wall of the limiting cavity 2132 and elastically deform under the extrusion of the cavity wall, and restore the deformation and snap into the limiting groove 2134 when sliding to the position of the limiting groove 2134. The outer wall of the limiting protrusion 2133 close to the guide cavity 2131 is a stop convex surface 2133a, which limits the insertion part 221 to move along the positive Z direction; the inner wall of the limiting groove 2134 close to the guide cavity 2131 is a stop inner wall 2134a, which cooperates with the limiting spring piece 2212 to limit the insertion part 221 to move along the negative Z direction. That is, the stopping convex surface 2133 a and the stopping inner wall 2134 a stop the inserting portion 221 in two opposite directions respectively, so as to prevent the inserting portion 221 from slipping out of the inserting cavity 213 after being assembled.

[0114] See also Fig.12The insertion portion 221 includes two rectangular portions connected along the Z direction, and the cross-sectional dimensions of the two rectangular portions are different to form the above-mentioned step structure 2211 therebetween.

[0115] like Fig.12 As shown, the contact portion 222 includes a connecting plate 2221, an elastic abutting plate 2224 and a reinforcing plate 2225. The connecting plate 2221 includes a first plate segment 2221a and two second plate segments 2221b respectively arranged at both ends of the first plate segment 2221a. The first plate segment 2221a and the two second plate segments 2221b are connected to form a U-shaped structure and surround a receiving groove. The first plate segment 2221a and the two second plate segments 2221b are both connected to the insertion portion 221. The U-shaped connecting plate 2221 has high strength and good anti-deformation ability, which prevents the movable contact piece 22 from being excessively deformed after multiple insertions. The elastic abutting plate 2224 is bent and connected to the first plate segment 2221a and is opposite to the first plate segment 2221a. Specifically, the first plate segment 2221a is connected to the elastic abutting plate 2224 through the first guide plate 2222 and the second guide plate 2223 in sequence. After being inserted into the contact cavity 1210, the elastic abutment plate 2224 and the first plate segment 2221a are both in contact with the inner wall of the contact cavity 1210 to ensure good conductive contact. The limiting spring piece 2212 and the elastic abutment plate 2224 are respectively located on opposite sides of the first plate segment 2221a. During the insertion process into the plug-in cavity 213, the limiting spring piece 2212 and the elastic abutment plate 2224 are elastically deformed inwardly under the squeezing action of the inner wall of the limiting cavity 2132, and the deformation is restored after the insertion is completed.

[0116] The elastic abutment plate 2224 includes a connected guide section and an arc section. The guide section is connected to the second guide plate 2223 and is a straight plate. It has a guiding function during the insertion process of the plug-in cavity 213 and the contact cavity 1210. The end of the arc section away from the guide section extends toward the first plate section 2221a and extends into the receiving groove, so that the elastic abutment plate 2224 is elastically deformed within the area defined by the receiving groove, thereby avoiding the contact portion 222 from being deflected after multiple insertions.

[0117] The reinforcing plate 2225 is bent and connected to one end of the arc section away from the guiding section, and the reinforcing plate 2225 extends into the receiving groove and is located between the first plate section 2221a and the elastic abutting plate 2224. When the elastic abutting plate 2224 is deformed, the reinforcing plate 2225 can abut against the first plate section 2221a. The provision of the reinforcing plate 2225 can improve the elastic performance of the elastic abutting plate 2224, enhance the anti-deformation ability, and also make the entire contact portion 222 have a higher strength.

[0118] See also Fig.12The end of the insertion portion 221 away from the contact portion 222 is also connected to a wiring portion 223, and the wiring portion 223 is used to connect the wires led out of the body 100. Exemplarily, the wiring portion 223 is a U-shaped plate structure, which defines a wiring cavity, and two rivet ports 2231 are provided on the two opposite side plates of the U-shaped plate structure to form a riveting plate 2232. The wire is inserted into the wiring cavity, and the wire is clamped in the wiring cavity by bending the riveting plate 2232, so as to realize the connection between the movable contact piece 22 and various accessories in the body 100.

[0119] Optionally, the second housing 21 and the movable contact piece 22 are both integrally formed parts, which are easy to manufacture and have high strength.

[0120] In this embodiment, the body 100 is fixedly connected with a transmission bracket 5, and the movable terminal 2 is movably connected to the transmission bracket 5 to achieve relative movement with the body 100. When the movable terminal 2 follows the body 100 to enter the drawer seat 200 along the X direction, it first stops just below the static terminal 1 to complete the positioning of the movable terminal 2 and the static terminal 1 before plugging. Subsequently, the body 100 continues to move, and at this time the movable terminal 2 moves along the positive Z direction to plug with the static terminal 1. After plugging, the movable terminal 2 no longer moves, and the body 100 moves forward along the X direction relative to the movable terminal 2 until it reaches the connection position.

[0121] To implement the above solution, in this embodiment, see Figure 3 , a positioning protrusion 44 is provided on the first mounting plate 3, and a limiting flange 33 is provided on one side of the second mounting plate 4 along the X direction, and a positioning groove 331 is provided on the limiting flange 33. When the movable terminal 2 moves toward the static terminal 1 along the body 100, the positioning protrusion 44 can be inserted into the positioning groove 331 along the X direction, so that the position of the movable terminal 2 in the Y direction can be corrected, and the first mounting plate 3 can abut against the limiting flange 33 to stop the movable terminal 2 in the X direction, so as to realize the alignment of the movable terminal 2 and the static terminal 1 in the Z direction.

[0122] See also Figure 2 , Fig.13 as well as Fig.14 A guide hole 51 is provided on the transmission bracket 5. The guide hole 51 includes a first hole segment 511 and a second hole segment 512 connected to each other. The second hole segment 512 extends along the X direction. The extension direction of the first hole segment 511 is between the X direction and the Z direction. Fig.14In the orientation, the first hole section 511 is tilted downward relative to the second hole section 512. A sliding post 43 is provided on the second mounting plate 4. The sliding post 43 is initially located at one end of the first hole section 511 away from the second hole section 512. After the moving terminal 2 is stopped below the static terminal 1, as the body 100 moves, the sliding post 43 slides with the first hole section 511 and the second hole section 512 in sequence. Furthermore, an elastic member 6 is also connected between the transmission bracket 5 and the second mounting plate 4. During the sliding cooperation between the sliding post 43 and the guide hole 51, the elastic member 6 is stretched and deformed. The elastic member 6 is exemplarily a spring, which is hooked in the hooking groove provided in the transmission bracket 5 and the second mounting plate 4.

[0123] The following reference Figure 2 , Figures 13 to 17 The process of the main body 100 entering the drawer seat 200 is described.

[0124] When the operator puts the body 100 into the drawer seat 200 but does not start to push it, the body 100 is at the outermost position relative to the drawer seat 200, and the sliding column 43 is at the end of the first hole section 511 away from the second hole section 512. Then, the operator manually pushes the body 100 at the outermost position to move the body 100 into the drawer seat 200, and the body 100 drives the transmission bracket 5, the second mounting plate 4 and the movable terminal 2 on the second mounting plate 4 to move synchronously until the first mounting plate 3 abuts against the limit flange 33, and the movable terminal 2 is stopped at a position aligned with the static terminal 1 up and down, as shown in FIG. Figure 2 and Fig.13 At this time, the movable terminal 2 is directly below the static terminal 1, but the two are not plugged in. In the above process, the sliding post 43 is always at the end of the first hole section 511 away from the second hole section 512.

[0125] Afterwards, when the main body 100 continues to be pushed to move along the X direction, the second mounting plate 4 and the movable terminal 2 no longer move along the X direction, and the transmission bracket 5 slides relative to the second mounting bracket. The sliding column 43 moves up along the Z direction under the pushing action of the inner wall of the first hole section 511 of the guide hole 51, so that the second mounting plate 4 moves up to be close to the static terminal 1 under the drive of the sliding column 43, until the main body 100 is pushed by the operator to reach the separation position. The separation position is the limit position of manually pushing the main body 100 inward. When the separation position is reached, the main body 100 can no longer be moved into the drawer seat 200 by manual pushing. Thereafter, the shaking handle needs to be used to continue to shake the main body 100 into the drawer seat 200. The solution for shaking the main body 100 into the drawer seat 200 is well known to technicians in this field and will not be repeated here. In the separation position, the sliding column 43 is still in the first hole section 511, and the movable terminal 2 and the static terminal 1 are still not plugged in, but relative to each other. Fig.13 The distance between the two is shortened.

[0126] After the body 100 is pushed to the separation position, the body 100 is further rocked into the drawer seat 200 using the rocking handle. At this time, the static terminal 1 remains stationary, and the transmission bracket 5 continues to move forward along the X direction with the body 100. The sliding column 43 continues to drive the movable terminal 2 to move upward along the Z direction under the pushing action of the inner wall of the guide hole 51. When the sliding column 43 slides from the first hole section 511 to the second hole section 512, the movable terminal 2 is plugged into the static terminal 1. Figure 4 , Fig.14 and Fig.15 In the state shown, the plug-in portion 211 of the movable terminal 2 enters the plug-in channel 114, and the movable contact piece 22 passes through the terminal socket 1112 and is plugged into the contact cavity 1210, making conductive contact with the static terminal 1. At this time, the body 100 reaches the test position.

[0127] After the main body 100 reaches the test position, continue to shake the handle to shake the main body 100 into the drawer seat 200 until the main body 100 reaches the connection position. Fig.16 and Fig.17 As shown, in the connection position, the sliding post 43 is at the end of the second hole section 512 away from the first hole section 511. When the body 100 reaches the connection position from the test position, the sliding post 43 slides relatively in the second empty section. During this process, the movable terminal 2 and the static terminal 1 remain stationary, and only the transmission bracket 5 moves along the X direction with the body 100. Therefore, it can be ensured that the movable terminal 2 and the static terminal 1 always maintain contact and stable contact during this stage, and the relative movement stroke of the movable terminal 2 and the static terminal 1 is greatly reduced, which can reduce the copper material used to make the terminal and reduce the cost.

[0128] Furthermore, an elastic member 6 is connected between the transmission bracket 5 and the second mounting plate 4. The elastic member 6 is stretched and deformed during the sliding fit between the sliding column 43 and the guide hole 51. When the transmission bracket 5 and the second mounting plate 4 do not move relative to each other, the sliding column 43 is kept at one end of the first hole section 511 away from the second empty section under the elastic force of the elastic member 6. The elastic member 6 is exemplarily a spring, which is hooked in the hooking groove provided in the transmission bracket 5 and the second mounting plate 4.

[0129] The process of moving the main body 100 out of the drawer seat 200 is opposite to the above process and will not be described here.

[0130] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. The terminal plug-in structure is characterized in that: It comprises a static terminal (1) and a dynamic terminal (2); The static terminal (1) comprises a first shell (11) and a wiring unit (12) arranged in the first shell (11), the first shell (11) is provided with a wiring port (1111) and a terminal socket (1112) on opposite sides thereof, and the wiring unit (12) has an elastic wire clamping portion (1223) and a contact cavity (1210); The elastic wire clamping portion (1223) is used to clamp the external lead passing through the wiring port (1111) and to be in conductive contact with the external lead; the movable terminal (2) can pass through the terminal socket (1112) and can be conductively plugged into the contact cavity (1210).

2. The terminal plug-in structure according to claim 1, characterized in that: The wiring unit (12) comprises a first static contact piece (121) and two second static contact pieces (122) arranged at intervals; The first static contact piece (121) comprises two fixed plates (1211) arranged at an interval, and the two second static contact pieces (122) are located between the two fixed plates (1211) in a mirror-symmetrical manner; The second static contact piece (122) comprises a bonding plate (1221), an elastic plate (1222) and an elastic wire clamping portion (1223) which are bent and connected in sequence, the bonding plate (1221) is bonded to the fixed plate (1211), the elastic plate (1222) is opposite to the bonding plate (1221), the elastic wire clamping portion (1223) is provided with a wire clamping opening (12231), the fixed plate (1211) is inserted into the wire clamping opening (12231), and the external lead clamp is arranged between a side of the fixed plate (1211) facing away from the bonding plate (1221) and an inner wall of the wire clamping opening (12231); The wiring port (1111) and the wire clamping port (12231) are arranged in one-to-one correspondence, an operating port (1113) is arranged on the first shell (11), an operating gap (123) is formed between the elastic plates (1222) of the two second static contact pieces (122), and the operating port (1113) is directly opposite to the operating gap (123).

3. The terminal plug-in structure according to claim 2, characterized in that: The first static contact piece (121) further comprises a contact plate (1212), wherein the contact plate (1212) is bent and connected between the two fixed plates (1211), and a bending portion (12121) is provided on the contact plate (1212), and the bending portion (12121) is arranged on a side facing away from the second static contact piece (122) to form the contact cavity (1210).

4. The terminal plug-in structure according to claim 2, characterized in that: The first static contact piece (121) is an integrated structure; and / or the second static contact piece (122) is an integrated structure.

5. The terminal plug-in structure according to claim 1, characterized in that: The terminal socket (1112) and the contact cavity (1210) form a tapered mouth structure, and the size of the tapered mouth structure gradually decreases along the plugging direction of the movable terminal (2); One end of the movable terminal (2) passing through the terminal socket (1112) is tapered in a gradually decreasing size along the plugging direction.

6. The terminal plug-in structure according to claim 5, characterized in that: The contact cavity (1210) has two arc-shaped contact walls (1210a) opposite to each other along the X direction; the terminal socket (1112) has two first guide walls (1112a) opposite to each other along the X direction, the two first guide walls (1112a) gradually approach each other and tilt along the plugging direction, and the included angle is α; the plane where the two first guide walls (1112a) are located is tangent to the two arc-shaped contact walls (1210a) in a one-to-one correspondence to form the tapered mouth structure; The movable terminal (2) comprises a second housing (21) and a movable contact piece (22) arranged on the second housing (21); a plug-in portion (211) is convexly provided on the second housing (21), and the movable contact piece (22) extends out of the plug-in portion (211); the movable contact piece (22) comprises a first guide plate (2222) and a second guide plate (2223) which are opposite to each other along the X direction; the plug-in portion (211) comprises a second guide wall (2111) and a third guide wall (2123) which are opposite to each other along the X direction and form an angle β. guide wall (2112); the second guide wall (2111) and the first guide plate (2222) are in the same plane, and the third guide wall (2112) and the second guide plate (2223) are in the same plane; the angle β ≤ the angle α, the first guide plate (2222) and the second guide plate (2223) extend into the contact cavity (1210), and the second guide wall (2111) and the third guide wall (2112) extend into the terminal socket (1112); The X direction is perpendicular to the plugging direction.

7. The terminal plug-in structure according to claim 6, characterized in that: At least two third guide plates (113) are protruded from the first shell (11) and are spaced apart along the Y direction. The sides of two adjacent third guide plates (113) facing each other gradually approach each other and tilt along the plugging direction to form a plugging channel (114). The plugging channel (114) and the terminal socket (1112) are sequentially arranged and face each other along the plugging direction. The plugging portion (211) is at least partially inserted into the plugging channel (114). The Y direction is perpendicular to both the X direction and the plugging direction.

8. The terminal plug-in structure according to claim 1, characterized in that: The movable terminal (2) comprises a second housing (21) and a movable contact piece (22); The second shell (21) is provided with an insertion cavity (213), the insertion cavity (213) comprising a guide cavity (2131) and a limit cavity (2132) which are connected to each other, and the cross section of the guide cavity (2131) gradually decreases towards the direction approaching the limit cavity (2132); the movable contact piece (22) comprises an insertion portion (221) and a contact portion (222) which are connected to each other; the insertion portion (221) is inserted into and limited in the limit cavity (2132) through the guide cavity (2131), and the contact portion (222) extends out of the limit cavity (2132) and is plugged into and matched with the contact cavity (1210).

9. The terminal plug-in structure according to claim 8, characterized in that: The cross-sectional shape of the insertion portion (221) is consistent with the cross-sectional shape of the limiting cavity (2132) and both are non-circular.

10. The terminal plug-in structure according to claim 8, characterized in that: A limiting protrusion (2133) and a limiting groove (2134) are provided on the inner wall of one end of the limiting cavity (2132) away from the guiding cavity (2131); The inserting portion (221) is provided with a step structure (2211) and a limiting spring piece (2212) on opposite sides thereof, and the limiting spring piece (2212) extends obliquely in a direction away from the contact portion (222); the step structure (2211) can be engaged with the limiting protrusion (2133), and the limiting spring piece (2212) can slide along the cavity wall of the limiting cavity (2132) and be clamped in the limiting clamping groove (2134); The limiting protrusion (2133) is close to the outer wall of the guide cavity (2131) and the limiting groove (2134) is close to the inner wall of the guide cavity (2131) to stop the insertion portion (221) in two opposite directions.

11. The terminal plug-in structure according to claim 8, characterized in that: The contact portion (222) comprises a connecting plate (2221), an elastic abutting plate (2224) and a reinforcing plate (2225); The connecting plate (2221) comprises a first plate segment (2221a) and two second plate segments (2221b) respectively arranged at two ends of the first plate segment (2221a); ​​the first plate segment (2221a) and the two second plate segments (2221b) are connected to form a U-shaped structure and surround a receiving groove; the first plate segment (2221a) and the two second plate segments (2221b) are both connected to the insertion portion (221); The elastic abutment plate (2224) is bent and connected to the first plate segment (2221a) and is opposite to the first plate segment (2221a), and the elastic abutment plate (2224) and the first plate segment (2221a) both abut against the inner wall of the contact cavity (1210); The reinforcing plate (2225) is bent and connected to one end of the elastic abutment plate (2224) away from the first plate section (2221a), and the reinforcing plate (2225) extends into the accommodating groove and is located between the first plate section (2221a) and the elastic abutment plate (2224).

12. The terminal plug-in structure according to any one of claims 1 to 11, characterized in that: The wiring terminal plug-in structure also includes a first mounting plate (3) and a second mounting plate (4); The first mounting plate (3) is provided with a first cavity (31), a plurality of the static terminals (1) are arranged side by side, and the plurality of static terminals (1) are clamped in the first cavity (31); A second cavity (41) is provided on the second mounting plate (4), a plurality of movable terminals (2) are arranged side by side, and the plurality of movable terminals (2) are clamped in the second cavity (41).

13. The terminal plug-in structure according to any one of claims 1 to 11, characterized in that: The first housing (11) comprises a main housing frame (111) and two cover plates (112); both sides of the main housing frame (111) along the arrangement direction of the static terminals (1) are provided with installation cavities (1110) for installing the wiring unit (12); and the cover plates (112) are detachably covered outside the installation cavities (1110).

14. A circuit breaker, characterized in that It comprises a main body (100), a drawer seat (200) and a terminal block plug-in structure as described in any one of claims 1 to 13, wherein the static terminal (1) is fixedly arranged on the drawer seat (200), the movable terminal (2) is movably connected to the main body (100), the main body (100) is movably arranged on the drawer seat (200), and the main body (100) can be moved to a connection position relative to the movable terminal (2) after the movable terminal (2) is inserted into the contact cavity (1210).

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