Plug-in circuit breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and particularly to a plug-in circuit breaker, which includes a circuit breaker housing provided with at least one protection pole assembly cavity and at least one protection pole. One end of the operating button of the protection pole is inserted into the circuit breaker housing. The operating button, the first outgoing terminal and the first incoming terminal are respectively arranged at both ends of the circuit breaker housing. The arc extinguishing system is arranged in the middle of the protection pole assembly cavity and on one side of the first incoming terminal. The operating mechanism is arranged between the operating button and the arc extinguishing system. The protection mechanism is arranged on one side of the operating mechanism and between the first outgoing terminal and the arc extinguishing system; when the plug-in circuit breaker is in the closed state, in case of a short circuit or overload, the protection mechanism drives the operating mechanism to act, so that the plug-in circuit breaker enters the tripped state. After the fault is eliminated, pressing the operating button drives the operating mechanism to act, so that the plug-in circuit breaker enters the closed state; the plug-in circuit breaker of the present invention has a compact structure and a small volume.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and in particular to a plug-in circuit breaker. Background Art

[0002] In the communications industry, standard cabinets are 1U units, with a height of approximately 44.45mm. With the rapid development of communications technology, the components within the cabinets must be continuously miniaturized to meet the installation dimensions of the 1U unit. This increases the density of components within the cabinet and reduces the overall size of communications equipment.

[0003] Existing standard miniature circuit breakers are typically between 80mm and 90mm tall. Combined with the space required for wiring at the input and output terminals, this requires a total of 3U in height, hindering the miniaturization of communication cabinets. Furthermore, the output terminals of standard miniature circuit breakers are located inside the cabinet, making it difficult for users to connect wires. Furthermore, adding auxiliary signaling functionality to standard miniature circuit breakers often requires the addition of auxiliary contact accessories or other similar functional accessories to the side of the circuit breaker, increasing costs and occupying additional installation space, hindering the miniaturization of communication cabinets. Summary of the Invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide a plug-in circuit breaker with a compact structure and a small size.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A plug-in circuit breaker comprises a circuit breaker housing and at least one protective pole, the circuit breaker housing including at least one protective pole assembly cavity; each protective pole comprises an operating button 1d, an operating mechanism 3 disposed within the protective pole assembly cavity and connected to the operating button 1d, a protective mechanism 4 engaged with the operating mechanism 3, an arc extinguishing system 5, a first incoming terminal 110, a first outgoing terminal 11, a movable contact 61 connected to the operating mechanism 3, and a stationary contact 62 engaged with the movable contact 61; one end of the operating button 1d is inserted into the circuit breaker housing, the operating button 1d and the first outgoing terminal 11 are disposed at one end of the circuit breaker housing, and the first incoming terminal 110 is disposed at the other end of the circuit breaker housing; the arc extinguishing system 5 is disposed in the middle of the protective pole assembly cavity and on one side of the first incoming terminal 110; the operating mechanism 3 is disposed between the operating button 1d and the arc extinguishing system 5; and the protective mechanism 4 is disposed on one side of the operating mechanism 3 and between the first outgoing terminal 11 and the arc extinguishing system 5;

[0007] The plug-in circuit breaker is in the closed state. When a short-circuit fault or an overload fault occurs, the protection mechanism 4 drives the operating mechanism 3 to act, causing the plug-in circuit breaker to enter the tripped state. After the fault is eliminated, press the operating button 1d to move it in the closing direction, driving the operating mechanism 3 to act, causing the plug-in circuit breaker to enter the closed state.

[0008] Preferably, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a tripping latch 32, a locking latch 36, a locking latch return spring 37, a main pulling spring 33, and a tripping latch return spring 38;

[0009] The operating handle 30 is pivotally arranged on the circuit breaker housing. One end of the operating handle 30 is drivingly connected to the operating button 1d through the U-shaped connecting rod 35, and the other end is rotatably connected to one end of the contact support rod 31. The other end of the contact support rod 31 is provided with a moving contact 61; One end of the tripping latch 32 is pivotally arranged on the circuit breaker housing, and the middle part is connected to the end of the contact support rod 31 provided with the moving contact 61 through the main pulling spring 33; The middle part of the locking latch 36 is rotatably arranged, one end is connected to the locking latch return spring 37, and the other end is in locking cooperation with the other end of the tripping latch 32 and is in driving cooperation with the protection mechanism 4; One end of the tripping latch return spring 38 is connected to the circuit breaker housing, and the other end is connected to the tripping latch 32;

[0010] When the plug-in circuit breaker is in the closed state and a short-circuit fault or an overload fault occurs, the protection mechanism 4 drives the locking latch 36 and the tripping latch 32 to release the locking cooperation, the plug-in circuit breaker trips, and the tripping latch return spring 38 drives the tripping latch 32 to rotate, causing the tripping latch 32 and the locking latch 36 to re-lock and cooperate, and at the same time the plug-in circuit breaker enters the tripped state.

[0011] Preferably, the tripping latch 32 is of a U-shaped structure, including a relatively arranged tripping latch first arm 32a and a tripping latch second arm 32b. The bottom of the U-shaped structure of the tripping latch 32 is arranged close to the end where the operating handle 30 is connected to the contact support rod 31. One end of the tripping latch first arm 32a is pivotally arranged, and the other end is connected to the tripping latch second arm 32b. The other end of the tripping latch second arm 32b is in locking cooperation with the locking latch 36.

[0012] Preferably, the tripping latch return spring 38 is a torsion spring, which is sleeved on the tripping latch return spring shaft 380 on one side of the tripping latch first arm 32a. Both ends of the tripping latch return spring shaft 380 are fixed on the circuit breaker housing; A tripping latch return boss 323 is provided in the middle of the tripping latch first arm 32a. One end of the tripping latch return spring 38 is connected to the circuit breaker housing, and the other end is connected to the tripping latch return boss 323.

[0013] Preferably, the operating mechanism 3 further includes a linkage member 44, which includes a linkage rod 440 and a linkage shaft 441 provided at one end of the linkage rod 440. Both ends of the linkage shaft 441 are pivotally provided on the circuit breaker housing. A polygonal hole 4410 is provided in the middle of the linkage shaft 441 along its axial direction. A linkage member actuated platform 442 is provided on the side of the linkage rod 440 opposite to the tripping latch 32. A linkage member driving platform 322 is provided on the second arm 32b of the tripping latch for driving and cooperating with the linkage member actuated platform 442.

[0014] The plug-in circuit breaker includes multiple protection poles, and the linkage shafts 441 of the multiple protection poles are connected by a linkage connecting shaft. When one of the protection poles trips, the linkage driving platform 322 of the tripping buckle 32 of the protection pole drives the linkage rod 440 to swing through the linkage receiving platform 442. The linkage rod 440 drives the linkage shaft 441 to rotate, driving the linkage rods 440 of other protection poles to swing, respectively striking the lock buckle 36 of each protection pole, so that each protection pole is tripped synchronously.

[0015] Preferably, the contact support rod 31 is an overall bow-shaped structure, with a support rod rotating shaft 311 rotatably connected to the operating handle 30 at one end, and a moving contact 61 at the other end. The moving contact 61 includes a moving contact plate 610 connected to the contact support rod 31 and a moving contact point 611 arranged at one end of the moving contact plate 610, and the other end of the moving contact plate 610 is connected to the main tension spring 33; an arc isolation plate 34 is also provided in the middle of the contact support rod 31. When the plug-in circuit breaker is in the open state, the arc isolation plate 34 enters between the moving contact 61 and the static contact 62. When the plug-in circuit breaker is in the closed state, the arc isolation plate 34 moves out from between the moving contact 61 and the static contact 62.

[0016] Preferably, the protection mechanism 4 includes a yoke 40 and a bimetallic strip 42. The yoke 40 is arranged on one side of the lock 36. The bimetallic strip 42 is arranged in the middle of the yoke 40 and located between the yoke 40 and the lock 36. One end of the bimetallic strip 42 is fixedly arranged and electrically connected to the first outlet terminal 11, and the other end is driven and matched with the lock 36 and electrically connected to the moving contact 61.

[0017] When a short circuit fault occurs, the lock buckle 36 is attracted to swing toward the direction of the yoke 40, releasing the lock fit with the jump buckle 32; when an overload fault occurs, the bimetallic strip 42 drives the lock buckle 36 to swing toward the direction of the yoke 40, releasing the lock fit with the jump buckle 32.

[0018] Preferably, the middle part of the lock 36 is rotatably set on one end of the yoke 40, one end of the lock 36 is connected to the circuit breaker housing through the lock reset spring 37, and the other end is arranged opposite to the yoke 40; one end of the bimetallic strip 42 is fixedly connected to the first output terminal 11 through the first conductive plate 2b, and the other end is electrically connected to the contact support rod 31 through the soft connection 63, and the static contact 62 is electrically connected to the first input terminal 110.

[0019] Preferably, the cross-section of the yoke 40 is a U-shaped structure. Two yoke support arms 400 are provided at one end of the yoke 40, and yoke limit grooves 401 are provided on the yoke support arms 400. The latch 36 includes a latch reset end 360, a latch support arm 361, a latch body 362, a latch hole 363, and a latch actuating end 364. The latch reset end 360, the latch body 362, and the latch actuating end 364 are connected in sequence. One latch support arm 361 is provided on each side of the connection between the latch reset end 360 and the latch body 362. The latch actuating end 364 is an L-shaped structure, with one end bent and connected to the latch body 362 and the other end drivingly cooperating with the bimetal 42. The two latch support arms 361 are respectively arranged in the two yoke limit grooves 401. The latch body 362 is arranged opposite to the yoke 40, and the latch hole 363 is provided on the latch body 362 for latching and cooperating with the jump latch 32.

[0020] Preferably, the arc extinguishing system 5 includes an arc extinguishing chamber 50, a moving contact arcing plate 51, and a static contact arcing plate 52 which are respectively arranged on both sides of the arc extinguishing chamber 50. The moving contact arcing plate 51 cooperates with the moving contact 61 and is electrically connected to the first outgoing terminal 11. One end of the static contact arcing plate 52 is provided with a static contact 62, and the other end is electrically connected to the first incoming terminal 110.

[0021] Preferably, it further includes a locking mechanism. The locking mechanism includes a first locking member 9. One end of the first locking member 9 is slidably arranged inside the circuit breaker housing, and the other end is a first protrusion 90 protruding outside the circuit breaker housing.

[0022] When the plug-in circuit breaker is assembled into the circuit breaker assembly position, the housing of the circuit breaker assembly position presses the first protrusion 90, causing the entire first locking member 9 to move towards the inside of the circuit breaker housing. After the plug-in circuit breaker is assembled in place, the first protrusion 90 protrudes outside the circuit breaker housing and is in limit cooperation with the housing of the circuit breaker assembly position.

[0023] Preferably, the locking mechanism further includes a second locking member 8. The middle of the second locking member 8 is rotatably arranged. One end is drivingly cooperated with the operation button 1d, and the other end is drivingly cooperated with the first locking member 9. When the plug-in circuit breaker is in the open state, pulling the operation button 1d drives the first protrusion 90 to move towards the inside of the circuit breaker housing through the second locking member 8, releasing the limit cooperation between the first protrusion 90 and the housing of the circuit breaker assembly position.

[0024] Preferably, the second locking member 8 further includes a second protrusion 82, and the second protrusion 82 is arranged at one end of the second locking member 8 cooperating with the first locking member 9.

[0025] When the plug - in circuit breaker is in the closed state, the operation button 1d drives the second locking member 8, causing the second protrusion 82 to protrude outside the circuit breaker housing; when the plug - in circuit breaker is in the open state, the operation button 1d drives the second locking member 8, causing the second protrusion 82 to move into the circuit breaker housing.

[0026] For the plug - in circuit breaker of the present invention, the layout of its protection poles is more compact, significantly reducing the volume of the plug - in circuit breaker, which is beneficial to saving the internal space of the communication cabinet and conforming to the miniaturization development trend of the communication cabinet. In addition, the protection mechanism has a simple structure. While ensuring the functions of short - circuit protection and overload protection, it significantly reduces the assembly space it occupies, which is beneficial to reducing the volume of the plug - in circuit breaker. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the plug - in circuit breaker of the present invention, which at least shows the external structure of the plug - in circuit breaker;

[0028] Figure 2 is a schematic structural diagram of the neutral pole of the plug - in circuit breaker of the present invention;

[0029] Figure 3 is a schematic structural diagram of the protection pole of the plug - in circuit breaker of the present invention;

[0030] Figure 4 is another schematic structural diagram of the protection pole of the plug - in circuit breaker of the present invention;

[0031] Figure 5 is a schematic structural diagram of the first embodiment of the operating mechanism of the present invention, at this time the plug - in circuit breaker is in the open state;

[0032] Figure 6 is a schematic structural diagram of the first embodiment of the operating mechanism of the present invention, at this time the plug - in circuit breaker is in the closed state;

[0033] Figure 7 is a schematic structural diagram of the first embodiment of the operating mechanism of the present invention, at this time the plug - in circuit breaker is in the tripped state;

[0034] Figure 8 is a schematic structural diagram of the second embodiment of the operating mechanism of the present invention, at this time the plug - in circuit breaker is in the closed state;

[0035] Figure 9 is a schematic structural diagram of the second embodiment of the operating mechanism of the present invention, at this time the plug - in circuit breaker is in the open state;

[0036] Figure 10 is an exploded view of the locking mechanism of the present invention;

[0037] Figure 11It is another exploded view of the locking mechanism of the present invention;

[0038] Figure 12 It is a schematic structural diagram of the indicating member of the present invention, showing at least the horizontal arm and the vertical arm of the indicating member;

[0039] Figure 13 It is a schematic structural diagram of the indicating member of the present invention, showing at least the track shaft of the indicating member;

[0040] Figure 14 It is a schematic structural diagram of the first locking member of the present invention, showing at least the first protrusion, the first actuated protrusion and the second actuated protrusion;

[0041] Figure 15 It is a schematic structural diagram of the first locking member of the present invention, showing at least the spring limiting groove of the locking member and the first track groove;

[0042] Figure 16 It is a schematic structural diagram of the locking mechanism of the present invention, at this time the plug-in circuit breaker is in the open state;

[0043] Figure 17 It is a schematic structural diagram of the locking mechanism of the present invention, at this time the plug-in circuit breaker is in the closed state;

[0044] Figure 18 It is a schematic structural diagram of the locking mechanism of the present invention, showing at least the cooperation relationship between the second locking member body of the second locking member and the second actuated protrusion;

[0045] Figure 19 It is a schematic structural diagram of the first embodiment of the wiring terminal of the present invention;

[0046] Figure 20 It is another schematic structural diagram of the first embodiment of the wiring terminal of the present invention;

[0047] Figure 21 It is the third schematic structural diagram of the first embodiment of the wiring terminal of the present invention;

[0048] Figure 22 It is a schematic structural diagram of the second embodiment of the wiring terminal of the present invention;

[0049] Figure 23 It is another schematic structural diagram of the second embodiment of the wiring terminal of the present invention;

[0050] Figure 24 It is the third schematic structural diagram of the second embodiment of the wiring terminal of the present invention;

[0051] Figure 25 It is a schematic assembly structural diagram of the third embodiment of the wiring terminal of the present invention;

[0052] Figure 26It is an exploded schematic view of the third embodiment of the terminal of the present invention;

[0053] Figure 27 It is a schematic structural view of the third embodiment of the terminal of the present invention, which at least shows the positional and connection relationships of the terminal screw, nut member, pressure plate and pressure plate mounting shaft;

[0054] Figure 28 It is a schematic structural view of the nut member of the terminal of the third embodiment of the present invention;

[0055] Figure 29 It is a schematic structural view of the pressure plate of the terminal of the third embodiment of the present invention;

[0056] Figure 30 It is another schematic structural view of the pressure plate of the terminal of the third embodiment of the present invention. Detailed implementation manners

[0057] The following further illustrates the detailed implementation manners of the plug-in circuit breaker of the present invention in combination with the embodiments given in Figure 1 -30. The plug-in circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0058] The plug-in circuit breaker of the present invention includes a circuit breaker housing and at least one protection pole. The circuit breaker housing includes at least one protection pole assembly cavity, and the protection pole assembly cavity is in one-to-one cooperation with the protection pole; each said protection pole includes an operation button 1d, as well as an operating mechanism 3 arranged in the protection pole assembly cavity and drivingly connected to the operation button 1d, a protection mechanism 4 drivingly cooperating with the operating mechanism 3, an arc extinguishing system 5, a first incoming line terminal 110, a first outgoing line terminal 11, a moving contact 61 connected to the operating mechanism 3, and a static contact 62 cooperating with the moving contact 61.

[0059] It should be noted that the plug-in circuit breaker of the present invention can be configured as required: a single-pole circuit breaker (i.e., a circuit breaker with only one protection pole), or a two-pole circuit breaker with one protection pole, or a two-pole circuit breaker with two protection poles, or a three-pole circuit breaker with three protection poles, or a four-pole circuit breaker with three protection poles, or a four-pole circuit breaker with four protection poles.

[0060] Preferably, as Figure 2 and 3As shown, one end of the operation button 1d is inserted into the circuit breaker housing. The operation button 1d and the first outgoing terminal 11 are arranged at one end of the circuit breaker housing, and the first incoming terminal 110 is arranged at the other end of the circuit breaker housing. The arc extinguishing system 5 is arranged in the middle of the protection pole assembly cavity and on one side of the first incoming terminal 110. The operating mechanism 3 is arranged between the operation button 1d and the arc extinguishing system 5, and the protection mechanism 4 is arranged between the first outgoing terminal 11 and the arc extinguishing system 5 and on one side of the operating mechanism 3. For the plug-in circuit breaker of the present invention, the layout of the protection pole is more compact, significantly reducing the volume of the plug-in circuit breaker, which is beneficial to saving the internal space of the communication cabinet and conforming to the miniaturization development trend of the communication cabinet. Specifically, as Figure 2 shown in -3, from left to right, the protection mechanism 4 and the operating mechanism 3 are arranged side by side. The protection mechanism 4 occupies about 1 / 4 of the width of the circuit breaker housing, and the operating mechanism 3 occupies about 3 / 4 of the width of the circuit breaker housing. The arc extinguishing system 5 is arranged below the protection mechanism 4 and the operating mechanism 3 and occupies about 3 / 5 of the width of the circuit breaker housing.

[0061] Preferably, as Figure 6 shown, when the plug-in circuit breaker is in the closing state and the operating mechanism 3 is in the latched state, in case of a short circuit fault or an overload fault, the protection mechanism 4 drives the operating mechanism 3 to trip, the plug-in circuit breaker trips and the operating mechanism 3 enters the tripped state (as Figure 7 shown), pulling the operation button 1d to move it in the opening direction, driving the operating mechanism 3 to return to the latched state, and the plug-in circuit breaker enters the opening state (as Figure 5 shown). Further, as Figure 3 shown in -7, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a tripping latch 32, a latching latch 36, a latching return spring 37 and a main pulling spring 33. The operating handle 30 is pivotally arranged on the circuit breaker housing. One end of the operating handle 30 is drivingly connected to the operation button 1d through the U-shaped connecting rod 35, and the other end is rotatably connected to one end of the contact support rod 31. The other end of the contact support rod 31 is provided with a moving contact 61. One end of the tripping latch 32 is pivotally arranged on the circuit breaker housing, and the middle part is connected to the end of the contact support rod 31 provided with the moving contact 61 through the main pulling spring 33. The middle part of the latching latch 36 is rotatably arranged, one end is connected to the latching return spring 37, and the other end is in latching cooperation with the other end of the tripping latch 32 and is in driving cooperation with the protection mechanism 4. Further, one end of the latching latch 36 is connected to the circuit breaker housing through the latching return spring 37.

[0062] Preferably, as Figure 8 shown, when the plug-in circuit breaker is in the closing state, in case of a short circuit fault or an overload fault, the protection mechanism 4 drives the operating mechanism 3 to act, making the plug-in circuit breaker enter the opening state (as Figure 9As shown in the figure, after troubleshooting, press the operation button 1d to move it in the closing direction, drive the operation mechanism 3 to act, and the plug-in circuit breaker enters the closing state. Further, as Figure 3 、 8 -9 shows, the operation mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a tripping latch 32, a locking latch 36, a locking latch return spring 37, a main pulling spring 33 and a tripping latch return spring 38; the operating handle 30 is pivotally arranged on the circuit breaker housing, one end of the operating handle 30 is drivingly connected to the operation button 1d through the U-shaped connecting rod 35, and the other end is rotatably connected to one end of the contact support rod 31, and the other end of the contact support rod 31 is provided with a moving contact 61; one end of the tripping latch 32 is pivotally arranged on the circuit breaker housing, and the middle part is connected to the end of the contact support rod 31 provided with the moving contact 61 through the main pulling spring 33; the middle part of the locking latch 36 is rotatably arranged, one end is connected to the circuit breaker housing through the locking latch return spring 37, and the other end is in driving cooperation with the protection mechanism 4 and is in locking cooperation with the tripping latch 32; one end of the tripping latch return spring 38 is connected to the circuit breaker housing, and the other end is connected to the tripping latch 32; when the plug-in circuit breaker is in the closing state and a short-circuit fault or an overload fault occurs, the protection mechanism 4 drives the locking latch 36 to release the locking cooperation with the tripping latch 32, the plug-in circuit breaker trips, and the tripping latch return spring 38 drives the tripping latch 32 to make the tripping latch 32 and the locking latch 36 re-lock and cooperate, and at the same time the circuit breaker enters the opening state.

[0063] Preferably, as Figure 3 -9 shows, the protection mechanism 4 includes a magnetic yoke 40 and a bimetallic strip 42. The magnetic yoke 40 is arranged on one side of the locking latch 36, the bimetallic strip 42 is arranged in the middle of the magnetic yoke 40 and is located between the magnetic yoke 40 and the locking latch 36. One end of the bimetallic strip 42 is fixedly arranged and is electrically connected to the first outgoing terminal 11, and the other end is in driving cooperation with the locking latch 36 and is electrically connected to the moving contact 61; when the plug-in circuit breaker is in the closing state and a short-circuit fault occurs, the locking latch 36 is attracted and swings in the direction of the magnetic yoke 40 to release the locking cooperation with the tripping latch 32; when the plug-in circuit breaker is in the closing state and an overload fault occurs, the bimetallic strip 42 bends and drives the locking latch 36 to swing in the direction of the magnetic yoke 40 to release the locking cooperation with the tripping latch 32. The protection mechanism 4 of the present invention has both short-circuit protection and overload protection functions, is simple and compact in structure, can effectively reduce the required assembly space while reliably completing the protection function, and is beneficial to the miniaturization development trend of the plug-in circuit breaker.

[0064] Preferably, as Figure 1As shown in FIGS. -4, the plug-in circuit breaker of the present invention further includes at least two auxiliary signal terminals that are pluggably connected to an external circuit; the moving contact 61 is electrically connected to the first outgoing terminal 11, the static contact 62 is electrically connected to the first incoming terminal 110, each auxiliary signal terminal is electrically connected to the first outgoing terminal 11, and a signal processing element is connected in series between at least one auxiliary signal terminal and the first outgoing terminal 11. Further, the signal processing element includes at least one diode. Further, the plug-in circuit breaker of the present invention further includes a second incoming terminal 100 and a second outgoing terminal 10. The second incoming terminal 100 and the first incoming terminal 110 are arranged side by side at one end of the circuit breaker housing, the second outgoing terminal 10 and the first outgoing terminal 11 are arranged side by side at the other end of the plug-in circuit breaker, and the two auxiliary signal terminals are arranged side by side between the first incoming terminal 110 and the second incoming terminal 100. For the plug-in circuit breaker of the present invention, its auxiliary signal terminals generate auxiliary signals by using the moving / static contacts, saving the space and cost of installing auxiliary contacts or similar accessories, facilitating the simplification of the circuit breaker structure, and conforming to the miniaturization trend of plug-in circuit breakers; moreover, the auxiliary signal terminals output signals, which can be used to judge the opening / closing state of the plug-in circuit breaker, such as realizing remote monitoring.

[0065] Preferably, as Figure 10 As shown in FIGS. -18, for the plug-in circuit breaker of the present invention, one end of the operation button 1d is inserted into the circuit breaker housing and is the inner end of the button, and the other end of the operation button 1d protrudes outside the circuit breaker housing and is the outer end of the button; the operation button 1d includes an indicator slot provided in the middle thereof and an indicator hole 12d provided on the outer end of the button, and the indicator hole 12d is connected to one end of the indicator slot; the plug-in circuit breaker further includes an indicator 7, and one end is provided with a closing indicator surface 70 and a tripping indicator surface 71 that respectively cooperate with the indicator hole 12d; when the plug-in circuit breaker is in the tripping state, the tripping indicator surface 71 is disposed opposite to the indicator hole 12d. Press the operation button 1d to move it in the closing direction, and at the same time, the indicator 7 moves integrally in the indicator slot. After the plug-in circuit breaker enters the closing state, the closing indicator surface 70 is disposed opposite to the indicator hole 12d. Pull the operation button 1d to move it in the tripping direction, and at the same time, the indicator 7 moves integrally in the indicator slot. After the plug-in circuit breaker enters the tripping state, the tripping indicator surface 71 is disposed opposite to the indicator hole 12d.

[0066] Further, the moving direction of the operation button 1d is perpendicular to the moving direction of the indicator 7 in the indicator slot.

[0067] Further, as Figure 10 and 12As shown, the operation button 1d further includes indicating part chutes 100d respectively provided on a pair of side walls of the indicating part slot, and the extending direction of the indicating part chutes 100d is perpendicular to the moving direction of the operation button 1d; the indicating part 7 further includes two indicating part slides 72 respectively provided on a pair of its side surfaces, and the indicating part slides 72 are slidably arranged in the indicating part chutes 100d.

[0068] Further, as shown in Figure 10 and 11 and 13, the indicating part 7 further includes an indicating part track shaft 75 provided at the other end thereof; an indicating part track slot is provided on the circuit breaker housing, and the indicating part track shaft 75 is slidably arranged in the indicating part track slot. When the operation button 1d is pressed / pulled, the indicating part track slot drives the indicating part 7 to move integrally in the indicating part slot through the indicating part track shaft 75, so that the closing indicating surface 70 / the opening indicating surface 71 is oppositely arranged with the indicating hole 12d.

[0069] In the plug-in circuit breaker of the present invention, the indicating part 7 is inserted into the indicating part slot provided in the operation button 1d, occupying less space and being beneficial to the miniaturization design of the circuit breaker. The closing indicating surface 70 and the opening indicating surface 71 of the indicating part 7 can be respectively oppositely arranged with the indicating hole 12d, and the user can directly observe through the indicating hole 12d to quickly judge the opening / closing state of the circuit breaker. Moreover, the indicating part moves integrally in the indicating part slot to realize the switching of the closing indicating surface and the opening indicating surface displayed in the indicating hole. The action of the indicating part is more accurate and has less error, making the closing indicating surface or the opening indicating surface completely fill the indicating hole, avoiding the situation that the closing indicating surface and the opening indicating surface are displayed in the indicating hole at the same time, resulting in misjudgment by the user, being beneficial to improving the user's electricity use safety. The cooperation between the indicating part chute 100d and the indicating part slide 72 restricts the moving path of the indicating part 7 and ensures the reliability of the indicating result.

[0070] As shown in Figure 1 -4 is an embodiment of the plug-in circuit breaker of the present invention.

[0071] The plug-in circuit breaker of the present invention includes a circuit breaker housing and at least one protection pole. The circuit breaker housing includes at least one protection pole assembly cavity, and the protection pole assembly cavity is in one-to-one cooperation with the protection pole; each of the protection poles includes an operation button 1d, as well as an operating mechanism 3 disposed in the protection pole assembly cavity and drivingly connected to the operation button 1d, a protection mechanism 4 drivingly cooperating with the operating mechanism 3, an arc extinguishing system 5, a first incoming line terminal 110, a first outgoing line terminal 11, a moving contact 61 connected to the operating mechanism 3, and a static contact 62 cooperating with the moving contact 61; one end of the operation button 1d is inserted into the circuit breaker housing, the operation button 1d and the first outgoing line terminal 11 are disposed at one end of the circuit breaker housing, and the first incoming line terminal 110 is disposed at the other end of the circuit breaker housing; the arc extinguishing system 5 is disposed in the middle of the protection pole assembly cavity and on one side of the first incoming line terminal 110, the operating mechanism 3 is disposed between the operation button 1d and the arc extinguishing system 5, and the protection mechanism 4 is disposed between the first outgoing line terminal 11 and the arc extinguishing system 5 and on one side of the operating mechanism 3.

[0072] Specifically, as Figure 1 shown in FIG. -2, the plug-in circuit breaker of the present invention is a two-pole circuit breaker, including a protection pole and a neutral pole. The protection pole is the L pole, and the neutral pole is the N pole; the plug-in circuit breaker further includes a circuit breaker housing composed of a front cover 1c, a base 1b, and a rear cover 1a. The front cover 1c and the base 1b enclose a protection pole assembly cavity that is in one-to-one cooperation with the protection pole, and the base 1b and the rear cover 1a enclose a neutral pole assembly cavity that cooperates with the neutral pole; the circuit breaker housing includes an upper side surface 101 and a lower side surface 102, a front side surface 105 and a rear side surface 106, and a left side surface 103 and a right side surface 104. As Figure 3 [[ID=~7]]shown in FIG. -4, the lower end of the operation button 1d is inserted into the circuit breaker housing, the operation button 1d and the first outgoing line terminal 11 are disposed at the upper end of the circuit breaker housing, the first incoming line terminal 110 is disposed at the lower end of the circuit breaker housing, the arc extinguishing system 5 is disposed in the middle of the protection pole assembly cavity and above the first incoming line terminal 110, the operating mechanism 3 is disposed between the operation button 1d and the arc extinguishing system 5, and the protection mechanism 4 is disposed between the first outgoing line terminal 11 and the arc extinguishing system 5 and on the left side of the operating mechanism 3.

[0073] Preferably, as Figure 1 shown in FIG. -2, the neutral pole further includes a second incoming line terminal 100 and a second outgoing line terminal 10. The second incoming line terminal 100 and the first incoming line terminal 110 are arranged side by side at the lower end of the circuit breaker housing, the second outgoing line terminal 10 and the first outgoing line terminal 11 are arranged side by side at the upper end of the circuit breaker housing, and the second incoming line terminal 100 is electrically connected to the second outgoing line terminal 10 through a second conductive plate 2a. Specifically, as Figure 1In the shown direction, the first incoming line terminal 110 and the second incoming line terminal 100 are respectively arranged at the right and left parts of the lower end of the circuit breaker housing; the first outgoing line terminal 11 and the second outgoing line terminal 10 are both arranged on the left side of the operation button 1d.

[0074] Preferably, as Figure 2 shown, both the first incoming line terminal 110 and the second incoming line terminal 100 include a first elastic element 2c. Each first elastic element 2c includes a first reed connecting plate and two relatively arranged first reed clamping plates. The two first reed clamping plates are respectively bent and connected to both ends of the first reed connecting plate. Each first reed clamping plate is of a "<" structure, and the two first reed clamping plates form an X-shaped structure as a whole.

[0075] As Figure 3 -7 shows the first embodiment of the operating mechanism 3 of the plug-in circuit breaker of the present invention.

[0076] The operating mechanism 3 of the first embodiment includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a tripping latch 32, a locking latch 36, a locking latch return spring 37 and a main pulling spring 33; the operating handle 30 is pivotally arranged on the circuit breaker housing. One end of the operating handle 30 is drivingly connected to the operation button 1d through the U-shaped connecting rod 35, and the other end is rotatably connected to one end of the contact support rod 31. The other end of the contact support rod 31 is provided with a moving contact 61; one end of the tripping latch 32 is pivotally arranged on the circuit breaker housing, and the middle part is connected to the end of the contact support rod 31 provided with the moving contact 61 through the main pulling spring 33; the middle part of the locking latch 36 is rotatably arranged, one end is connected to the locking latch return spring 37, and the other end is in driving cooperation with the protection mechanism 4 and in locking cooperation with the other end of the tripping latch 32. Further, one end of the return spring 37 is connected to one end of the locking latch 36, and the other end is connected to the circuit breaker housing. Specifically, the return spring 37 can be a torsion spring or a straight cylindrical spring.

[0077] Further, as Figure 3 -7 shows, the tripping latch 32 is of a U-shaped structure (see Figure 6 ), and includes a relatively arranged tripping latch first arm 32a and a tripping latch second arm 32b. The bottom of the U-shaped structure of the tripping latch 32 is arranged close to the end where the operating handle 30 is connected to the contact support rod 31. One end of the tripping latch first arm 32a is pivotally arranged, and the other end is connected to one end of the tripping latch second arm 32b. The other end of the tripping latch second arm 32b is in locking cooperation with the locking latch 36.

[0078] Further, as Figure 3 -7 shows, the contact support rod 31 is of an overall bow-shaped structure, one end is provided with a support rod rotating shaft 311 rotatably connected to the operating handle 30, and the other end is provided with a moving contact 61 (see Figure 5), the moving contact 61 includes a moving contact plate 610 connected to the contact support rod 31 and a moving contact point 611 provided at one end of the moving contact plate 610. The other end of the moving contact plate 610 is connected to the main pulling spring 33. Further, an arc separating plate 34 is provided in the middle of the contact support rod 31 (see Figure 3 ). When the plug-in circuit breaker is in the open state, the arc separating plate 34 enters between the moving contact 61 and the static contact 62. When in the closed state, the arc separating plate 34 moves out between the moving contact 61 and the static contact 62.

[0079] Further, as shown in Figure 5 -7, the operating mechanism 3 further includes a linkage member 44. The linkage member 44 includes a linkage rod 440 and a linkage shaft 441 provided at one end of the linkage rod 440. Both ends of the linkage shaft 441 are pivotally provided on the circuit breaker housing. A polygonal hole 4410 is provided in the middle of the linkage shaft 441 along its axial direction. A linkage member receiving platform 442 is provided on the side of the linkage rod 440 opposite to the trip latch 32; a linkage member driving platform 322 for driving cooperation with the linkage member receiving platform 442 is provided on the second arm 32b of the trip latch; the plug-in circuit breaker includes a plurality of protection poles. The linkage shafts 441 of the plurality of protection poles are connected by a linkage member connecting shaft. The linkage member connecting shafts are respectively engaged with the polygonal holes 4410 of the respective linkage members 44. When a certain protection pole trips, the linkage member driving platform 322 of the trip latch 32 of this protection pole drives the linkage rod 440 to swing through the linkage member receiving platform 442. The linkage rod 440 drives the linkage shaft 441 to rotate. This linkage shaft 441 drives the linkage rods 440 of other protection poles to swing through the linkage member connecting shaft, respectively knocking the latches 36 of each protection pole to make each protection pole trip synchronously. Further, the linkage members 44 of each protection pole can be connected by a single linkage member connecting shaft, or the adjacent two protection poles can be connected by a single linkage member connecting shaft.

[0080] Specifically, as shown in Figure 4- In the direction shown in FIG. 7, the trip latch 32 and the contact support rod 31 are both arranged below the operating handle 30. The upper end of the operating handle 30 is drivingly connected to the operating button 1d through a U-shaped connecting rod 35, pivotally arranged in the middle on the circuit breaker housing, and the lower end is rotatably connected to the support rod rotating shaft 311 at the upper end of the contact support rod 31; the trip latch 32 is of a U-shaped structure with its opening facing downwards, including a trip latch second arm 32b and a trip latch first arm 32a respectively arranged on its left and right sides. The lower end of the trip latch first arm 32a is pivotally arranged on the circuit breaker housing, and the upper end is connected to the upper end of the trip latch second arm 32b. The lower end of the trip latch second arm 32b is in locking cooperation with the latch 36. The middle of the trip latch 32 is connected to the upper end of the moving contact plate 610 of the contact support rod 31 through a main tension spring 33; the upper end of the contact support rod 31 is stacked in front of the middle of the trip latch 32, and the lower end is provided with a moving contact 61. The moving contact 61 includes a moving contact plate 610, and a moving contact point 611 is arranged on the right side of the lower end of the moving contact plate 610, and the upper end is connected to the lower end of the main tension spring 33; the left end of the arc dividing plate 34 is rotatably connected to the lower end of the contact support rod 31, and the right end is in cooperation with the moving contact 61 and the static contact 62, extending between the moving contact 61 and the static contact 62 during opening and moving out between the moving contact 61 and the static contact 62 during closing; preferably, a support rod - arc dividing plate limiting groove is provided on the contact support rod 31. When the contact support rod 31 drives the moving contact 61 and the static contact 62 to open and close, the support rod - arc dividing plate limiting groove drives the arc dividing plate 34 to extend into and move out between the moving and static contacts and limits the swinging amplitude of the right end of the arc dividing plate 34; the latch 36 is arranged on the left side of the trip latch 32, pivotally arranged in the middle, the upper end is connected to the circuit breaker housing through a latch return spring 37, and the lower end is in locking cooperation with the lower end of the trip latch second arm 32b of the trip latch 32; the linkage 44 is arranged between the latch 36 and the trip latch 32. The upper end of the linkage rod 440 is pivotally arranged through a linkage shaft 441. A linkage receiving platform 442 is provided on the right side below the linkage shaft 441 in the middle of the linkage rod 440, and a linkage driving platform 322 for driving cooperation with the linkage receiving platform 442 is provided on the left side of the upper end of the trip latch second arm 32b. Preferably, as Figure 4 shown, the operating handle 30 is pivotally arranged on the circuit breaker housing through an operating handle mounting shaft 14. Further, both ends of the operating handle mounting shaft 14 are pivotally connected to the front cover 1c and the base 1b respectively. Further, as Figure 5 shown in FIG. 7, the operating handle 30 further includes an operating handle - connecting rod hole for cooperating with the U-shaped connecting rod 35, an operating handle - support rod hole for cooperating with the support rod rotating shaft 311 of the contact support rod 31, and an operating handle shaft hole for cooperating with the operating handle mounting shaft 14; the operating handle 30 is approximately triangular, and the operating handle - connecting rod hole, the operating handle shaft hole, and the operating handle - support rod hole are respectively arranged at three vertices of a triangle.

[0081] Preferably, as Figure 4As shown, the lower end of the first arm 32a of the trip latch 32 is pivotally arranged on the circuit breaker housing through a trip latch mounting shaft 15. Further, both ends of the trip latch mounting shaft 15 are pivotally connected to the front cover 1c and the base 1b respectively. Preferably, as Figure 5 shown, a trip latch - spring connection hole 320 connected to one end of the main pull spring 33 is provided in the middle of the trip latch 32, and a moving contact plate - spring connection hole 310 is provided at the upper end of the moving contact plate 610. Preferably, as Figure 5 shown, the lower end of the second arm 32b of the trip latch is a wedge-shaped structure, and a latch hole 363 for latch cooperation with the lower end of the second arm 32b of the trip latch is provided at the lower end of the latch 36.

[0082] As Figure 8 shown in FIG. -9, it is the second embodiment of the operating mechanism 3 of the plug-in circuit breaker of the present invention.

[0083] The difference between the operating mechanism 3 of the second embodiment and that of the first embodiment is that: it further includes a trip latch return spring 38, one end of the trip latch return spring 38 is connected to the circuit breaker housing, and the other end is connected to the trip latch 32; when the plug-in circuit breaker is in the closed state and a short circuit fault or an overload fault occurs, the protection mechanism 4 drives the latch 36 and the trip latch 32 to release the latch cooperation, the plug-in circuit breaker trips, and the trip latch return spring 38 drives the trip latch 32 to rotate, so that the trip latch 32 and the latch 36 are latched again, and at the same time the plug-in circuit breaker enters the open state. Further, the trip latch return spring 38 is a torsion spring, which is sleeved on a trip latch return spring shaft 380 on one side of the first arm 32a of the trip latch, and both ends of the trip latch return spring shaft 380 are fixed on the circuit breaker housing; a trip latch return boss 323 is provided in the middle of the first arm 32a of the trip latch, one end of the trip latch return spring 38 is connected to the circuit breaker housing, and the other end is connected to the trip latch 32.

[0084] Specifically, as Figure 8 shown in FIG. -9, after the latch 36 and the trip latch 32 release the latch cooperation, the trip latch 32 rotates counterclockwise, the contact support rod 31 rotates clockwise, after the contact support rod 31 drives the moving contact 61 into the tripping position, the trip latch return spring 38 makes the trip latch 32 rotate clockwise through the trip latch return boss 323 until the lower end of the second arm 32b of the trip latch is latched again with the latch 36.

[0085] As Figure 3 shown in FIG. -9, it is an implementation manner of the protection mechanism 4 of the plug-in circuit breaker of the present invention.

[0086] The protection mechanism 4 includes a yoke 40 and a bimetal 42. The yoke 40 is arranged on one side of the latch 36. The bimetal 42 is arranged in the middle of the yoke 40 and is located between the yoke 40 and the latch 36. One end of the bimetal 42 is fixedly arranged and electrically connected to the first outgoing terminal 11, and the other end is in driving cooperation with the latch 36 and is electrically connected to the moving contact 61. When the plug-in circuit breaker is in the closed state and a short-circuit fault occurs, the latch 36 is attracted and swings towards the direction where the yoke 40 is located, releasing the latching cooperation with the tripping latch 32. When the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetal 42 drives the latch 36 to swing towards the direction where the yoke 40 is located, releasing the latching cooperation with the tripping latch 32.

[0087] Specifically, as shown in the direction of Figure 5 -9, the yoke 40 is arranged on the left side of the latch 36. The bimetal 42 is arranged in the middle of the yoke 40 and is located between the yoke 40 and the latch 36. The upper end of the latch 36 is fixedly arranged, the middle part is rotatably arranged, and the lower end is arranged opposite to the yoke 40, is in driving cooperation with the bimetal 42 and is in latching cooperation with the tripping latch 32. When the plug-in circuit breaker is in the closed state and a short-circuit fault occurs, a short-circuit current flows through the bimetal 42, generating a magnetic field that is strengthened by the yoke 40. The lower end of the latch 36 is attracted and swings towards the direction where the yoke 40 is located, releasing the latching cooperation with the tripping latch 32. When the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetal 42 heats up and bends to the left, driving the lower end of the latch 36 to swing towards the direction where the yoke 40 is located, releasing the latching cooperation with the tripping latch 32.

[0088] Preferably, as shown in Figure 5 -9, the middle part of the latch 36 is rotatably arranged on one end of the yoke 40. One end of the latch 36 is connected to the circuit breaker housing through a latch return spring 37, and the other end is arranged opposite to the yoke 40. The fixedly arranged end of the bimetal 42 is electrically connected to the first outgoing terminal 11 through a first conductive plate 2b (see Figure 3 ), and the other end is electrically connected to the contact support rod 31 through a flexible connection 63. The static contact 62 is electrically connected to the first incoming terminal 110. Further, the protection mechanism 4 further includes an adjusting screw. The adjusting screw is in limit cooperation with the circuit breaker housing, and one end is in threaded cooperation with the end of the first conductive plate 2b connected to the bimetal 42 to adjust the position of the bimetal 42 so as to adjust the tripping threshold or parameters of the bimetal 42.

[0089] Specifically, as shown in Figure 2 -9, the middle part of the latch 36 is rotatably arranged on the upper end of the yoke 40. The upper end of the latch 36 is connected to the circuit breaker housing through a latch return spring 37, and the lower end is arranged opposite to the yoke 40. The upper end of the bimetal 42 is electrically connected to the first outgoing terminal 11 through a first conductive plate 2b, and the lower end is electrically connected to the contact support rod 31 through a flexible connection 63. The static contact 62 is electrically connected to the first incoming terminal 110.

[0090] Preferably, the first conductive plate 2b is electrically connected to the contact support rod 31 through a second flexible connection, adding a circuit from the first conductive plate 2b to the contact support rod. Thus, when a short-circuit fault occurs in a plug-in circuit breaker with a large ampere-rated current specification, the current flowing through the bimetal is reduced, avoiding the situation where the bimetal fails due to overheating caused by excessive current.

[0091] Preferably, as Figure 3 shown in FIG. -9, the cross-section of the magnetic yoke 40 is a U-shaped structure. One end of the magnetic yoke 40 is provided with two oppositely arranged magnetic yoke support arms 400 (see Figure 6 ), and the magnetic yoke support arms 400 are provided with magnetic yoke limiting grooves 401; the latch 36 includes a latch reset end 360, a latch support arm 361, a latch body 362, a latch hole 363, and a latch actuated end 364 (see Figure 5 ), the latch reset end 360, the latch body 362, and the latch actuated end 364 are connected in sequence. On both sides of the connection between the latch reset end 360 and the latch body 362, there is a latch support arm 361 each. The latch actuated end 364 is an L-shaped structure, with one end bent and connected to the latch body 362, and the other end drivingly cooperating with the bimetal 42. The two latch support arms 361 are respectively arranged in the two magnetic yoke limiting grooves 401. The latch body 362 is arranged opposite to the magnetic yoke 40, and the latch hole 363 is arranged on the latch body 362 to latch and cooperate with the trip latch 32.

[0092] Specifically, as Figure 3 shown in FIG. -9, at the upper end of the magnetic yoke 40, there are two oppositely arranged magnetic yoke support arms 400, and the magnetic yoke support arms 400 are provided with magnetic yoke limiting grooves 401; the upper end of the latch body 362 is bent and connected to the latch reset end 360, and the lower end is bent and connected to the latch actuated end 364. The latch reset end 360 is bent to the right, the latch actuated end 364 is bent to the left, and the latch hole 363 is arranged in the middle of the latch body 362 to cooperate with the magnetic yoke 40 relatively.

[0093] As Figure 3 shown in FIG. -4, it is an embodiment of the arc extinguishing system 5 of the plug-in circuit breaker of the present invention.

[0094] The arc extinguishing system 5 includes an arc extinguishing chamber 50 and a moving contact arc guiding plate 51 and a static contact arc guiding plate 52 respectively arranged on both sides of the arc extinguishing chamber 50; the moving contact arc guiding plate 51 cooperates with the moving contact 61 and is electrically connected to the first outgoing terminal 11, and one end of the static contact arc guiding plate 52 is provided with a static contact 62, and the other end is electrically connected to the first incoming terminal 110.

[0095] Specifically, as Figure 3As shown in Fig. -4, the moving contact arcing plate 51 and the static contact arcing plate 52 are respectively arranged on the left and right sides of the arc extinguishing chamber 50. The upper end of the moving contact arcing plate 51 is matched with the moving contact 61, and the moving contact arcing plate 51 is electrically connected to the first outgoing terminal 11. The upper end of the static contact arcing plate 52 is provided with a static contact 62, and the lower end is electrically connected to the first incoming terminal 110. The upper ends of the moving contact arcing plate 51 and the static contact arcing plate 52 are bent towards each other.

[0096] As Figure 1 As shown in Fig. -4, the plug-in circuit breaker of the present invention further includes at least two auxiliary signal terminals that are pluggably connected to an external circuit. Each auxiliary signal terminal is electrically connected to the first outgoing terminal 11, and a signal processing element is connected in series between at least one auxiliary signal terminal and the first outgoing terminal 11. Further, the signal processing element includes at least one diode. Further, a signal processing element is connected in series between each of the auxiliary signal terminals and the first outgoing terminal 11; or, a signal processing element is connected in series between one of the auxiliary signal terminals and the first outgoing terminal 11, and no signal processing element is provided between the other auxiliary signal terminal and the first outgoing terminal 11. The plug-in circuit breaker of the present invention preferably adopts the latter method, so that the plug-in circuit breaker can output a DC signal through one auxiliary signal terminal and an AC signal through the other auxiliary signal terminal, making the plug-in circuit breaker more adaptable and meeting the requirements of different application environments.

[0097] It should be noted that the signal processing element is not limited to a diode, and can also be other components that can convert an AC signal into a DC signal; of course, the signal processing element can also simply add functions according to user needs.

[0098] Specifically, as Figure 1 As shown in Fig. -4, the plug-in circuit breaker of the present invention includes two auxiliary signal terminals that are pluggably connected to an external circuit, namely the first auxiliary signal terminal 12 and the second auxiliary signal terminal 13. Each auxiliary signal terminal is electrically connected to the first outgoing terminal 11 through the moving contact arcing plate 51, and a diode is connected in series between the second auxiliary signal terminal 13 and the moving contact arcing plate 51. Further, as Figure 1 In the direction shown in Fig. -4, the first incoming terminal 110, the second incoming terminal 100, the first auxiliary signal terminal 12, and the second auxiliary signal terminal 13 are all arranged at the lower end of the plug-in circuit breaker. The first auxiliary signal terminal 12 and the second auxiliary signal terminal 13 are arranged side by side between the first incoming terminal 110 and the second incoming terminal 100. Further, the auxiliary signal terminal can be connected to a circuit structure such as an external control circuit board, for example, to achieve remote monitoring.

[0099] Preferably, as Figure 3 and 4As shown, each of the auxiliary signal terminals includes a second elastic element 2d. Each second elastic element 2d includes a second reed connecting plate and two relatively arranged second reed clamping plates. The two second reed clamping plates are respectively bent and connected to both ends of the second reed connecting plate. Each second reed clamping plate is in a "<" structure, and the two second reed clamping plates form an X-shaped structure as a whole.

[0100] Preferably, as Figure 3 shown, the plug-in circuit breaker of the present invention further includes an exhaust port 16. A first exhaust channel is also provided in the protection pole assembly cavity. One end of the first exhaust channel is connected to the air outlet of the arc extinguishing chamber 50 of the arc extinguishing system 5, and the other end is connected to the external environment through the exhaust port 16. Specifically, as Figure 3 shown, the exhaust port 16 is provided on the lower end surface of the circuit breaker housing, between the second auxiliary signal terminal 13 and the first incoming line terminal 110.

[0101] Preferably, as Figure 10 shown in FIGS. 12-13, for the plug-in circuit breaker of the present invention, one end of the operation button 1d is inserted into the circuit breaker housing, which is the inner end of the button, and the other end of the operation button 1d protrudes outside the circuit breaker housing, which is the outer end of the button; the operation button 1d includes an indicator slot provided in the middle thereof and an indicator hole 12d provided on the outer end of the button. The indicator hole 12d is connected to one end of the indicator slot; the plug-in circuit breaker further includes an indicator 7 slidably inserted into the indicator slot. One end of the indicator 7 is provided with a closing indicator surface 70 and a tripping indicator surface 71 respectively cooperating with the indicator hole 12d; when the plug-in circuit breaker is in the tripping state, the tripping indicator surface 71 is arranged opposite to the indicator hole 12d. Press the operation button 1d to move it in the closing direction. At the same time, the indicator 7 moves integrally in the indicator slot. After the plug-in circuit breaker enters the closing state, the closing indicator surface 70 is arranged opposite to the indicator hole 12d. Pull the operation button 1d to move it in the tripping direction. At the same time, the indicator 7 moves integrally in the indicator slot. After the plug-in circuit breaker enters the tripping state, the tripping indicator surface 71 is arranged opposite to the indicator hole 12d.

[0102] Preferably, the moving direction of the operation button 1d is perpendicular to the moving direction of the indicator 7 in the indicator slot.

[0103] Preferably, as Figure 10 shown in FIGS. 10-11, the operation button 1d further includes indicator chutes 100d respectively provided on a pair of side walls of the indicator slot. The extending direction of the indicator chutes 100d is perpendicular to the moving direction of the operation button 1d; as Figure 12 shown, the indicator 7 further includes two indicator slides 72 respectively provided on a pair of its side surfaces. The indicator slides 72 are slidably arranged in the indicator chutes 100d to limit the moving path of the indicator 7 in the indicator chutes 100d.

[0104] Preferably, as Figure 11 and 13 shown, the indicating member 7 further includes an indicating member track shaft 75 provided at the other end thereof; as Figure 10 shown, an indicating member track groove is provided on the circuit breaker housing, and the indicating member track shaft 75 is slidably provided in the indicating member track groove. By pressing / pulling the operation button 1d, the indicating member track groove drives the indicating member 7 to move integrally in the indicating member slot through the indicating member track shaft 75, so that the closing indicating surface 70 / opening indicating surface 71 is disposed opposite to the indicating hole 12d. The indicating member track groove is an inclined track groove, which can be linearly inclined or arc-shaped inclined. As another embodiment for driving the indicating member 7 to move, an inclined driving surface can also be provided on the indicating member 7, and a driving protrusion is provided on the circuit breaker housing. Through the cooperation of the inclined driving surface and the driving protrusion, when the indicating member 7 presses / pulls the operation button 1d, it moves horizontally relative to the operation button 1d.

[0105] Further, as Figure 10 shown, the indicating member track groove is an inclined track groove, which is formed by the relative cooperation of two inclined half-grooves on the relatively arranged circuit breaker housings; when the plug-in circuit breaker is in the opening state, the indicating member track shaft 75 is located at one end of the indicating member track groove, which is the first end of the track groove. When the plug-in circuit breaker is in the closing state, the indicating member track shaft 75 is located at the other end of the indicating member track groove, which is the second end of the track groove. The first end of the track groove is closer to the outer end of the button of the operation button 1d than the second end of the track groove.

[0106] It should be noted that the closing indicating surface 70 and the opening indicating surface 71 can be of different colors. For example, the closing indicating surface is green and the opening indicating surface is red; or, the closing indicating surface 70 and the opening indicating surface 71 have different text or symbol markings. For example, the closing indicating surface 70 has the word "closing" or the symbol "|", and the opening indicating surface 71 has the word "opening" or the symbol "○"; of course, the implementation forms of the two are not limited to the above two. As long as the closing indicating surface 70 and the opening indicating surface 71 can be effectively distinguished to correctly indicate the closing and opening states of the plug-in circuit breaker.

[0107] Specifically, as Figure 10 and 11 shown, the upper end of the operation button 1d is the outer end of the button, and the lower end is the inner end of the button. An indicating hole 12d is provided on the end surface of the outer end of the button, and the indicating hole 12d is connected to the upper end of the indicating member slot; the closing indicating surface 70 and the opening indicating surface 71 are arranged side by side at the upper end of the indicating member 7, and two indicating member slide platforms 72 are provided on both sides of the middle of the indicating member 7, and the indicating member track shaft 75 is provided at the lower end of the indicating member 7. As Figure 10As shown, the indicating member track groove is formed by the relative cooperation of two inclined half-grooves. One inclined half-groove is provided on the rear cover 1a and is the first half-groove 10a, and the other inclined half-groove is provided on the base 1b and is the second half-groove 10b. The upper right end of the indicating member track groove is the first end of the track groove, and the lower left end is the second end of the track groove. When the plug-in circuit breaker is tripped, the indicating member track shaft 75 is located at the first end of the track groove. When the plug-in circuit breaker is closed, the indicating member track shaft 75 is located at the second end of the track groove. As Figure 10 shown, when the plug-in circuit breaker is in the tripped state, when the operation button 1d is pressed down (even if the operation button 1d is moved in the closing direction), since the operation button 1d moves linearly and the indicating member track groove is inclined from the upper right to the lower left, the indicating member track groove will drive the indicating member 7 to move horizontally through the indicating member track shaft 75 (i.e., the overall movement of the indicating member 7 in the indicating member slot), realizing the switching from the tripping indicating surface 71 being opposite to the indicating hole 12d to the closing indicating surface 70 being opposite to the indicating hole 12d. When the plug-in circuit breaker is in the closed state, when the operation button 1d is pulled up, the indicating member 7 undergoes the reverse process described above.

[0108] Preferably, as Figure 10 shown in FIG. -18, the plug-in circuit breaker of the present invention further includes a locking mechanism. The locking mechanism includes a second locking member 8 pivotally arranged in the middle. The second locking member 8 includes a locking member upper end and a locking member lower end respectively provided at both ends thereof, and a second protrusion 82 is provided at the locking member lower end. When the plug-in circuit breaker is in the closed state, the operation button 1d drives the second locking member 8 to rotate through the locking member lower end, so that the second protrusion 82 protrudes outside the circuit breaker housing. When the plug-in circuit breaker is in the tripped state, the operation button 1d drives the second locking member 8 to rotate through the locking member upper end, so that the second protrusion 82 moves into the circuit breaker housing. Further, as Figure 11 、 12 shown in FIGS. 18, the indicating member 7 further includes an indicating member horizontal arm 74 provided at one end thereof. The second locking member 8 further includes a second locking member actuating portion 81 provided at the locking member upper end. The operation button 1d drives and cooperates with the second locking member actuating portion 81 through the indicating member horizontal arm 74 to drive the second locking member 8 to rotate, so that the second protrusion 82 moves into the circuit breaker housing. Further, as Figure 11 、 12 shown in FIGS. 17, the second locking member 8 further includes a second locking member actuating protrusion 83 provided at the locking member lower end. The second locking member actuating protrusion 83 protrudes in the opposite direction to the second protrusion 82. When the plug-in circuit breaker is in the closed state, the indicating member horizontal arm 74 is located on one side of the second locking member actuating protrusion 83 and is in limit cooperation with it, so that the second protrusion 82 remains protruding outside the circuit breaker housing.

[0109] Specifically, as Figure 18The direction shown, the horizontal arm 74 of the indicating member is provided at the lower end of the indicating member 7 and is connected to it at a right angle and protrudes to the left. The actuating part 81 of the second locking member is provided at the upper end of the second locking member 8 and is connected to it at a right angle and protrudes to the right. The second protrusion 82 ( Figure 18 In Figure 18 , the second protrusion 82 is blocked by the first locking member 9) and the actuating protrusion 83 of the second locking member are both provided at the lower end of the second locking member 8 and protrude to the left and right sides of the second locking member 8 respectively. The horizontal arm 74 of the indicating member is located below the actuating part 81 of the second locking member and is in driving cooperation with it. As Figure 18 shown, when the plug-in circuit breaker is in the open state, the operation button 1d drives the second locking member 8 to rotate counterclockwise through the cooperation of the horizontal arm 74 of the indicating member and the actuating part 81 of the second locking member, and then the second protrusion 82 moves into the circuit breaker housing; as Figure 17 shown in the direction, when the plug-in circuit breaker is in the closed state, the operation button 1d moves downward, presses the actuating protrusion 83 of the second locking member through the horizontal arm 74 of the indicating member, and makes the second locking member 8 rotate counterclockwise, then the second protrusion 82 protrudes outside the circuit breaker housing. Since the horizontal arm 74 of the indicating member is located on the left side of the actuating protrusion 83 of the second locking member and is in limiting cooperation with it, the second protrusion 82 is kept protruding outside the circuit breaker housing.

[0110] For the plug-in circuit breaker of the present invention, when it is in the closed state, the horizontal arm 74 of the indicating member 7 of the indicating member keeps the second protrusion 82 of the second locking member 8 protruding outside the circuit breaker housing, avoiding the occurrence of electric shock when the circuit breaker is installed in the closed state, which is beneficial to improving the electrical safety of users.

[0111] It should be noted that the driving of the second locking member 8 is not limited to being driven by the horizontal arm 74 of the indicating member. It can also be that a structure similar to the horizontal arm 74 of the indicating member is provided at the lower end of the operation button 1d to drive the second locking member 8.

[0112] Preferably, as Figure 10 shown in FIGS. 11-14, 15-16, 16-18, the locking mechanism further includes a first locking member 9. One end of the first locking member 9 is slidably provided in the circuit breaker housing, and the other end is a first protrusion 90 protruding outside the circuit breaker housing. When the plug-in circuit breaker is assembled into the cavity-type circuit breaker assembly position, the housing of the circuit breaker assembly position presses the first protrusion 90, causing the first locking member 9 to move integrally into the circuit breaker housing. After the plug-in circuit breaker is assembled in place, the first protrusion 90 protrudes outside the circuit breaker housing and is in limiting cooperation with the housing of the circuit breaker assembly position.

[0113] The plug-in circuit breaker of the present invention, after the first locking member 9 is assembled to the cavity-type circuit breaker assembly position and assembled in place, is in limit cooperation with the housing at the circuit breaker assembly position, ensuring the reliability of the assembly of the plug-in circuit breaker, and preventing the plug-in circuit breaker from being accidentally pulled out in the closed state, thus improving the electrical safety.

[0114] Preferably, as Figure 16 shown in FIG. -18, the lower end of the locking member of the second locking member 8 is in driving cooperation with the first locking member 9; when the plug-in circuit breaker is in the open state, pulling the operation button 1d, the operation button 1d drives the first locking member 9 to move integrally towards the inside of the circuit breaker housing through the second locking member 8, so that the first protrusion 90 is disengaged from the limit cooperation with the housing at the circuit breaker assembly position. Further, as Figure 14 shown in FIG. -18, the first sliding end 90a further includes a first driven protrusion 91 and a second driven protrusion 94; the second locking member 8 further includes a second locking member main body 84 pivotally arranged in the middle, the second locking member driven part 81 of the second locking member 8 is bent and connected to one end of the second locking member main body 84, a second protrusion 82 is provided at the other end of the second locking member main body 84 and this end is in driving cooperation with the second driven protrusion 94, the second locking member driven part 81 and the second protrusion 82 respectively protrude towards both sides of the second locking member main body 84, and the second protrusion 82 is in driving cooperation with the first driven protrusion 91.

[0115] It should be noted that the first locking member 9 may omit the first driven protrusion 91 or the second driven protrusion 94, and retain any one of them for cooperation with the second locking member 8. Of course, this improvement will reduce the stability and reliability of the operation of the first locking member 9.

[0116] Preferably, as Figure 11 and 15 shown, the first locking member 9 further includes a first sliding end 90a slidably arranged in the circuit breaker housing, one side of the first sliding end 90a is connected to the first protrusion 90, and the other side is connected to the circuit breaker housing through a first locking member return spring 9a. The first locking member return spring 9a provides a force to the first locking member 9, so that the first protrusion 90 remains protruding outside the circuit breaker housing.

[0117] Specifically, as Figure 16 and 17 shown in the direction, the upper end of the second locking member main body 84 is bent and connected to the second locking member driven part 81 (connected at a right angle or approximately at a right angle), the second protrusion 82 is arranged at one side edge of the lower end of the second locking member main body 84, the lower end of the second locking member main body 84 and the second protrusion 82 are respectively arranged on the right side of the second driven protrusion 94 and the first driven protrusion 91; as Figure 16As shown, the plug - in circuit breaker is in the tripped state. Pull up the operation button 1d upward. The operation button 1d drives the second locking member 8 to rotate clockwise through the cooperation of the indicating member horizontal arm 74 of the indicating member 7 and the actuating part 81 of the second locking member. Then, the lower end of the second locking member body 84 drives the first locking member 9 to move leftward (move into the circuit breaker housing) through the second actuating protrusion 94, and the second protrusion 82 drives the first locking member 9 to move leftward through the first actuating protrusion 91, so that the first protrusion 90 of the first locking member 9 releases the limiting cooperation with the housing at the circuit breaker assembly position.

[0118] Preferably, as Figure 10 shown, the circuit breaker housing is provided with a first opening 11a that cooperates with the first protrusion 90 and the second protrusion 82. Specifically, as Figure 1 shown, the first opening 11a is provided on the right side surface of the circuit breaker housing, and the first protrusion 90 and the second protrusion 82 respectively protrude outside the circuit breaker housing through the first opening 11a.

[0119] As Figure 11 shown in FIGS. - 18, it is an embodiment of the locking mechanism of the plug - in circuit breaker of the present invention.

[0120] As Figure 10 and 11 shown, the locking mechanism includes a first locking member 9, a second locking member 8 and an indicating member 7; one end of the indicating member 7 is inserted into the operation button 1d, and the other end is in driving cooperation with the second locking member 8. The middle of the second locking member 8 is pivotally arranged, and one end is in driving cooperation with the first locking member 9.

[0121] Preferably, as Figure 10 、 11 、14、15 shown, the first locking member 9 includes a first protrusion 90 and a first sliding end 90a respectively arranged at both ends thereof. One side of the first sliding end 90a is connected to the first protrusion 90, and the other side is connected to the circuit breaker housing through the first locking member return spring 9a. Further, as Figure 15 shown, the first sliding end 90a includes a locking member spring limiting groove 92 arranged on one side thereof. A locking member spring limiting protrusion is also provided in the middle of the locking member spring limiting groove 92. One end of the first locking member return spring 9a is inserted into the locking member spring limiting groove 92 and sleeved on the locking member spring limiting protrusion. Further, as Figure 15 shown, one end of the first sliding end 90a is provided with a first track groove 93, which cooperates with the first sliding track on the circuit breaker housing to define the sliding path of the first sliding end 90a. Further, as Figure 14As shown, the first sliding end 90a further includes a first driven protrusion 91 and a second driven protrusion 94. The first driven protrusion 91 and the first track groove 93 are respectively provided at both ends of the first sliding end 90a. The second driven protrusion 94 is provided on the upper side of the first sliding end 90a and is located between the first driven protrusion 91 and the first track groove 93.

[0122] Preferably, as Figure 10 , 11 , Figures 16 - 18 show that the second locking member 8 includes a second locking member driven part 81, a second locking member main body 84, a second locking member driven protrusion 83 and a second protrusion 82. The middle of the second locking member main body 84 is pivotally arranged on the circuit breaker housing through a second locking member mounting shaft 80. One end is bent and connected to the second locking member driven part 81, and the other end is provided with a second locking member driven protrusion 83 and a second protrusion 82. The second locking member driven part 81 and the second protrusion 82 respectively protrude to both sides of the second locking member main body 84, and the second locking member driven part 81 and the second locking member driven protrusion 83 protrude on the same side of the second locking member main body 84.

[0123] Specifically, as Figure 10 and 11 shown, the second locking member 8 includes a locking member upper end and a locking member lower end respectively provided at its upper and lower ends. The second locking member driven part 81 is bent and connected (connected at a right angle or approximately at a right angle) to the second locking member main body 84 to form the locking member upper end. The second protrusion 82 and the second locking member driven protrusion 83 are both provided at the lower end of the second locking member main body 84. The second protrusion 82 and the lower end of the second locking member main body 84 form the locking member lower end. A second locking member mounting shaft 80 is provided in the middle of the second locking member main body 84, and both ends of the second locking member mounting shaft 80 are pivotally connected to the circuit breaker housing respectively. The lower end of the second locking member main body 84 is in driving cooperation with the second driven protrusion 94. The second locking member driven protrusion 83 is provided at one side edge of the lower end of the second locking member main body 84 (as Figure 10 shown in the direction, the second locking member driven protrusion 83 is provided at the left side edge of the lower end of the second locking member main body 84), and the second protrusion 82 protrudes below the lower end of the second locking member main body 84 and is connected to the second locking member driven protrusion 83 (as Figure 10In the shown direction, the actuated part 81 of the second locking member and the main body 84 of the second locking member form an L-shaped structure as a whole. The actuated protrusion 83 of the second locking member and the second protrusion 82 are of an integral plate structure, and are located on the left side of the above L-shaped structure as a whole. The upper end is the actuated protrusion 83 of the second locking member, which is connected to the lower end of the main body 84 of the second locking member. The lower end is the second protrusion 82, which protrudes below the lower end of the main body 84 of the second locking member. The actuated part 81 of the second locking member and the second protrusion 82 protrude towards both sides of the main body 84 of the second locking member respectively. The actuated part 81 of the second locking member and the actuated protrusion 83 of the second locking member protrude towards the same side of the main body 84 of the second locking member. The second protrusion 82 is in driving cooperation with the first actuated protrusion 91.

[0124] Preferably, as Figure 10 shown in FIGS. 13 and 17 - 18, the indicating member 7 includes an indicating member main body 7-0, an indicating member horizontal arm 74, an indicating member track shaft 75, an indicating member slide 72, a closing indicating surface 70 and a tripping indicating surface 71. The indicating member horizontal arm 74 is provided at one end of the indicating member main body 7-0 and is bent and connected to the indicating member main body 7-0. The closing indicating surface 70 and the tripping indicating surface 71 are arranged side by side at the other end of the indicating member main body 7-0. Two indicating member slides 72 are respectively provided in the middle of both sides of the indicating member main body 7-0. Further, as Figure 12 shown, the indicating member 7 further includes an indicating member vertical arm 73. The indicating member vertical arm 73 and the indicating member horizontal arm 74 are provided at the same end of the indicating member main body 70, and the two form an L-shaped structure as a whole. The indicating member vertical arm 73 is beneficial to improving the structural strength of the indicating member horizontal arm 74.

[0125] Specifically, as Figure 12 and 13 shown in the direction, the closing indicating surface 70 and the tripping indicating surface 71 are arranged side by side on the upper end surface of the indicating member main body 7-0. The indicating member track shaft 75, the indicating member horizontal arm 74 and the indicating member vertical wall 73 are all provided at the lower end of the indicating member main body 7-0. The indicating member horizontal arm 74 and the indicating member vertical wall 73 are provided on the same side of the indicating member main body 7-0, and form an L-shaped structure as a whole. The indicating member track shaft 75 is provided on the other side of the indicating member main body 7-0. Two indicating member slides 72 are provided on both sides of the middle of the indicating member main body 7-0, and are both located between the tripping indicating surface 71 and the indicating member horizontal arm 74.

[0126] As Figure 10 shown, the circuit breaker housing is provided with an indicating member track groove that cooperates with the indicating member track shaft 75. The indicating member track groove is inclined. The indicating member track groove is an inclined track groove, and its upper right end inclines towards the lower left end. Further, as Figure 10As shown, the indicating member track groove includes a first vertical groove, an inclined groove, and a second vertical groove. The lower end of the first vertical groove is connected to the upper right end of the inclined groove, and the upper end of the second vertical groove is connected to the lower left end of the inclined groove. The lower end of the first vertical groove is higher than the upper end of the second vertical groove. Further, as Figure 10 shown, the indicating member track groove is composed of two relatively mating inclined half-grooves. Specifically, one inclined half-groove is provided on the rear cover 1a, and the other inclined half-groove is provided on the base 1b.

[0127] Preferably, as Figure 10 shown, the operation button 1d includes a button body 10d and a button cap provided at one end of the button body 10d. An indicating hole 12d is provided in the middle of the button cap. In the middle of the other end of the button body 10d, there is an indicating member slot, and on each of the two side walls of the indicating member slot, there is an indicating member chute 100d. Further, as Figure 10 shown, the operation button 1d further includes a button connecting platform 11d, and the button connecting platform 11d is rotatably connected to one end of the U-shaped connecting rod 35.

[0128] Combined with Figure 16 -18 shown, the working principle of the locking mechanism will be described below:

[0129] As Figure 16 shown, the plug-in circuit breaker is in the open state. The operation button 1d is driven by the indicating member horizontal arm 74 of the indicating member 7 and the second locking member receiving part 81 of the second locking member 8 to drive the second locking member 8 to rotate clockwise. The second protrusion 82 of the second locking member 8 moves into the circuit breaker housing. In this state (open state), the plug-in circuit breaker can be inserted into the circuit breaker assembly position (such as a cabinet); as Figure 18 shown, when the plug-in circuit breaker is in the open state, continue to pull the operation button 1d. The operation button 1d is driven by the indicating member horizontal arm 74 of the indicating member 7 and the second locking member receiving part 81 of the second locking member 8 to drive the second locking member 8 to continue to rotate clockwise. The lower end of the second locking member body 84 and the second protrusion 82 of the second locking member 8 respectively drive the second receiving protrusion 94 and the first receiving protrusion 91, so that the first protrusion 90 of the first locking member 9 moves into the circuit breaker housing, thereby releasing the limit fit between the plug-in circuit breaker and the housing of the circuit breaker assembly position, enabling the plug-in circuit breaker to be removed from the circuit breaker assembly position; as Figure 17As shown, when the plug - in circuit breaker is in the closed state, the operation button 1d drives the horizontal arm 74 of the indicating member to move downward. The horizontal arm 74 of the indicating member drives the second locking member 8 to rotate counterclockwise through the driven projection 83 of the second locking member, causing the second projection 82 to protrude outside the circuit breaker housing. In this state (closed state), the second projection 82 protrudes outside the circuit breaker housing. Due to the limitation of the horizontal arm 74 of the indicating member on the driven projection 83 of the second locking member, the second projection 82 cannot be pressed into the circuit breaker housing. Therefore, when the plug - in circuit breaker is in the closed state, it cannot be assembled to the circuit breaker assembly position. When the plug - in circuit breaker switches between the open state and the closed state, due to the cooperation between the indicating member track shaft 75 and the indicating member track groove, the indicating member 7 also reciprocates within the indicating member slot of the operation button 1d. Thus, when the plug - in circuit breaker is closed, the closing indicating surface 70 is opposite to the indicating hole 12d (preferably, at this time, the indicating member track shaft 75 is located at the connection of the second vertical groove and the inclined groove). When the plug - in circuit breaker is open, the opening indicating surface 71 is opposite to the indicating hole 12d (preferably, at this time, the indicating member track shaft 75 is located at the connection of the first vertical groove and the inclined groove). Continuing to pull the operation button 1d, the indicating member track shaft 75 slides along the first vertical groove until the second locking member 8 drives the first locking member 9 to release the limit fit with the housing at the circuit breaker assembly position).

[0130] The present invention also discloses a terminal.

[0131] As Figure 19 shown in Fig. - 24, it is an embodiment of the terminal of the present invention.

[0132] The terminal of the present invention includes a terminal screw 2e, a pressure plate 2g, a nut member 2f, and a terminal board 2j. The terminal screw 2e is threadedly connected to the nut member 2f. The pressure plate 2g is disposed between the nut member 2f and the nut of the terminal screw, and is inclined relative to the terminal board 2j. The terminal board 2j is fixedly disposed. One end of the pressure plate 2g is limited, and the other end is opposite to the terminal board 2j to form a space for connecting wires. Insert the wire between the pressure plate 2g and the terminal board 2j, and turn the terminal screw 2e. The nut member 2f moves axially along the terminal screw 2e. At the same time, the nut member 2f drives the end of the pressure plate 2g that cooperates with the terminal board 2j to lift, pressing the wire tightly between the pressure plate 2g and the terminal board 2j. Further, the nut member 2f is in limit fit with the terminal assembly cavity for accommodating the terminal, preventing the nut member 2f from rotating and only allowing it to move axially along the terminal screw 2e. Turning the terminal screw 2e, the nut member 2f reciprocates axially along the terminal screw 2e.

[0133] Specifically, as Figure 19In the direction shown in FIG-24, the left end of the wire pressing plate 2g is restrained, and the right end is positioned opposite and in conjunction with the terminal block 2j. The wire pressing plate 2g gradually tilts downward from the left end to the right end, with the left end of the wire pressing plate 2g higher than the right end. When the terminal screw 2e is turned, the nut 2f moves upward along the axis of the terminal screw 2e. At the same time, the nut 2f drives the right end of the wire pressing plate 2g to gradually rise, pressing the wire between the wire pressing plate 2g and the terminal block 2j. Of course, when it is necessary to remove the wire, it is necessary to turn the terminal screw 2e, causing the nut 2f to move downward along the axis of the terminal screw 2e, reducing the pressure between the wire pressing plate 2g and the wire, facilitating easier wire removal.

[0134] Preferably, Figure 19 As shown in FIG. 24 , the terminal block 2j is provided with a plurality of transverse grooves or transverse ribs arranged side by side on the side facing the wire pressing plate 2g, and the extending direction of the transverse grooves or transverse ribs is perpendicular to the direction of wire insertion.

[0135] In the wiring terminal of the present invention, the pressure applied by the wire pressing plate 2g to the wire located between the wire pressing plate 2g and the terminal plate 2j mainly includes the pressure generated by the deformation of the wire pressing plate 2g itself and the pressure applied by the nut member 2f to the wire through the wire pressing plate 2g. Compared with the existing wiring terminal that only relies on the wire pressing plate 2g to press the wire, the wiring is more reliable.

[0136] It should be noted that, in the terminal block of this embodiment, the nut member 2f may not be limited by the terminal assembly cavity that accommodates the terminal block, but instead relies solely on the friction generated by the contact between the nut member 2f and the wire pressing plate 2g to limit the nut member 2f from rotating with the terminal screw 2e. In addition, since the nut member 2f is a special-shaped member, its center of gravity is located at one end of the nut member 2f and does not coincide with the axis of the terminal screw 2e, thus generating an eccentric force that limits the nut member 2f from rotating with the terminal screw 2e. In addition, in the terminal block of this embodiment, the nut member 2f and the terminal screw 2e may also be fixedly connected (instead of a threaded connection), and the terminal screw 2e is threadedly engaged with the housing of the terminal assembly cavity. When the terminal screw 2e is turned, the terminal screw 2e moves relative to the terminal assembly cavity, simultaneously driving the nut member 2e to move, which can also drive the wire pressing plate 2g to operate.

[0137] like Figure 19 21 shows the first embodiment of the terminal block of the present invention.

[0138] The terminal includes a connection screw 2e, a pressure plate 2g, a nut member 2f, a connection plate 2j, a pressure plate mounting shaft 2h, and a pressure plate return spring 2i; the connection screw 2e is threadedly connected to the nut member 2f, and the nut member 2f is in limit fit with the terminal assembly cavity for accommodating the terminal to prevent the nut member 2f from rotating. When the connection screw 2e is screwed, the nut member 2f reciprocates axially along the connection screw 2e; the pressure plate 2g is arranged between the nut member 2f and the nut of the connection screw, and is inclined relative to the connection plate 2j, and the connection plate 2j is fixedly arranged; one end of the pressure plate 2g is provided with a pressure plate bushing 20g, and the other end is arranged opposite to and cooperates with the connection plate 2j. The pressure plate bushing 20g is sleeved on the pressure plate mounting shaft 2h, and both ends of the pressure plate mounting shaft 2h are respectively fixed on the cavity wall of the terminal assembly cavity. The pressure plate return torsion spring 2i is sleeved on the pressure plate mounting shaft 2h, with one end connected to the cavity wall of the terminal assembly cavity and the other end connected to the pressure plate 2g. For the terminal of this embodiment, the pressure plate return spring 2i can drive the raised end of the pressure plate 2g to fall while the nut member 2f moves downward, improving the wire removal efficiency and convenience.

[0139] Specifically, as Figure 19 shown in the direction of -21, the left end of the pressure plate 2g is provided with a pressure plate bushing 20g, and the right end is arranged opposite to and cooperates with the connection plate 2j. The pressure plate 2g is gradually inclined downward from the left end to the right end, and the left end of the pressure plate 2g is higher than the right end of the pressure plate 2g. As Figure 20 shown, at this time, the gap between the right end of the pressure plate 2g and the connection plate 2j is the largest, and the wire can be inserted between the pressure plate 2g and the connection plate 2j at this time. Then, the connection screw 2e is screwed to make the nut member 2f move upward along the axis of the connection screw 2e, and at the same time, the right end of the pressure plate 2g is gradually lifted, and the gap between the right end of the pressure plate 2g and the connection plate 2j gradually becomes smaller, so as to press the wire tightly; as Figure 21 shown, at this time, the gap between the right end of the pressure plate 2g and the connection plate 2j is the smallest, almost 0.

[0140] Preferably, as Figure 21 shown, the pressure plate 2g includes a pressure plate bushing 20g, a first connecting portion 21g, and a first wire pressing portion 22g. One end of the first connecting portion 21g is connected to the pressure plate bushing 20g, and the other end is bent and connected to one end of the first wire pressing portion 22g. The other end of the first wire pressing portion 22g cooperates with the connection plate 2j. Specifically, as Figure 21 shown in the direction, the left end of the first connecting portion 21g is connected to the pressure plate bushing 20g, and the right end is bent and connected to the left end of the first wire pressing portion 22g. The right end of the first wire pressing portion 22g is arranged opposite to and cooperates with the connection plate 2j. Further, as Figure 19As shown in Fig. -21, the wire pressing plate 2g is integrally in an L-shaped structure. The width of the first wire pressing part 22g is greater than the width of the first connecting part 21g, and the length of the wire pressing plate bushing 20g is the same as the width of the first connecting part 21g; the wiring screw 2e is arranged at the notch of the L-shaped structure of the wire pressing plate 2g.

[0141] Preferably, as Figure 20 shown, the nut member 2f includes a first nut member part 20f threadedly connected to the wiring screw 2e and a second nut member part 21f bent and connected to one end of the first nut member part 20f. The first nut member part 20f is arranged opposite to and used in cooperation with the first connecting part 21g, and the second nut member part 21f is arranged opposite to and used in cooperation with the first wire pressing part 22g. Specifically, as Figure 19 shown in Fig. -20, in the initial state, the second nut member part 21f is in contact and connected with the first wire pressing part 22g (the two are substantially parallel), and the right end of the first nut member part 20f is in contact and connected with the right end of the first connecting part 21g; as Figure 21 shown, after the wiring screw 2e is screwed, first, the second nut member part 21f drives the first wire pressing part 22g to gradually lift, and at the same time, the second nut member part 21f gradually separates from the first wire pressing part 22g, and then the first nut member part 20f and the first connecting part 21g cooperate to drive the first wire pressing part 22g to continue to lift.

[0142] Preferably, as Figure 20 shown, the included angle α between the first connecting part 21g and the first wire pressing part 22g is greater than the included angle β between the first nut member part 20f and the second nut member part 21f.

[0143] As Figure 22 shown in Fig. -24, it is the second embodiment of the wiring terminal of the present invention.

[0144] The wiring terminal of the present invention includes a wiring screw 2e, a wire pressing plate 2g, a nut member 2f and a wiring board 2j; the wiring screw 2e is threadedly connected to the nut member 2f, and the nut member 2f is in limit fit with the terminal assembly cavity accommodating the wiring terminal to prevent the nut member 2f from rotating. By screwing the wiring screw 2e, the nut member 2f reciprocates axially along the wiring screw 2e; the wire pressing plate 2g is arranged between the nut member 2f and the nut of the wiring screw, and is inclined relative to the wiring board 2j. The wiring board 2j is fixedly arranged, one end of the wire pressing plate 2g is limited, and the other end is arranged opposite to and used in cooperation with the wiring board 2j; the wire is inserted between the wire pressing plate 2g and the wiring board 2j, and by screwing the wiring screw 2e, the nut member 2f moves axially along the wiring screw 2e, and at the same time, the nut member 2f drives the end of the wire pressing plate 2g cooperating with the wiring board 2j to lift, and presses the wire between the wire pressing plate 2g and the wiring board 2j.

[0145] Preferably, as Figure 22As shown in FIGS. -24, the wire pressing plate 2g includes a first wire pressing plate part 200g, a second wire pressing plate part 210g, and a third wire pressing plate part 220g. The first wire pressing plate part 200g is sleeved on the wiring screw 2e through a first opening provided thereon. The second wire pressing plate part 210g is provided with a second waist-shaped hole, and the second wire pressing plate hole 210g is sleeved on the wiring screw 2e through the second waist-shaped hole. One end of the first wire pressing plate part 200g is bent and connected to one end of the second wire pressing plate part 210g. The other end of the second wire pressing plate part 210g is bent and connected to the third wire pressing plate part 220g. The other end of the third wire pressing plate part 220g is used in cooperation with the wiring board 2j. The second wire pressing plate part 210g and the third wire pressing plate part 220g are integrally inclined with respect to the wiring board 2j; the nut member 2f includes a first nut member part 20f threadedly connected to the wiring screw 2e and a second nut member part 21f bent and connected to the first nut member part 20f. The first nut member part 20f and the second wire pressing plate part 210g are oppositely arranged and used in cooperation. The second nut member part 21f and the third wire pressing plate part 220g are oppositely arranged and used in cooperation. Further, as Figure 23 shown, the connection part between the first wire pressing plate part 200g and the second wire pressing plate part 210g is an arc structure. The included angle α1 between the second wire pressing plate part 210g and the third wire pressing plate part 220g is greater than the included angle β between the first nut member part 20f and the second nut member part 21f.

[0146] Specifically, as Figure 22 shown in FIGS. -24, the first wire pressing plate part 200g and the second wire pressing plate part 210g are sequentially arranged between the nut of the wiring screw 2e and the nut member 2f. The left end of the third wire pressing plate part 220g is bent and connected to the right end of the second wire pressing plate part 210g. The right end of the third wire pressing plate 220 is oppositely arranged and used in cooperation with the wiring board 2j; as Figure 22 and 23 shown, at this time, there is no mutual force or there is a weak force between the nut of the wiring screw 2e and the first wire pressing plate part 200g, and between the third wire pressing plate part 220g and the second nut member part 21f; as Figure 24 shown, at this time, there is a large force between the nut of the wiring screw 2e and the first wire pressing plate part 200g, and between the second wire pressing plate part 210g and the first nut member part 20f (due to the compression of the connection part between the first wire pressing plate part 200g and the second wire pressing plate part 210g). When the wiring screw 2e is screwed to make the nut member 2f move downward, the connection part between the first wire pressing plate part 200g and the second wire pressing plate part 210g in the compressed state gradually expands, causing the third wire pressing plate part 220g to gradually move downward, making it more convenient to disconnect the wiring terminal.

[0147] As Figure 25 shown in FIGS. -30, another embodiment of the wiring terminal of the present invention is shown.

[0148] The terminal of the present invention includes a connection screw 2e, a pressure plate 2g, a pressure plate mounting shaft 2h, a nut member 2f and a connection board 2j; the connection screw 2e is threadedly connected to the nut member 2f; the pressure plate 2g includes an upper pressure plate 2g1 and a lower pressure plate 2g2 which are arranged oppositely, both the upper pressure plate 2g1 and the lower pressure plate 2g2 are inclined relative to the connection board 2j, a connection part where one end of the upper pressure plate 2g1 is connected to one end of the lower pressure plate 2g2 is sleeved on the pressure plate mounting shaft 2h, and free ends of the lower pressure plate 2g2 and the upper pressure plate 2g1 are both arranged oppositely to the connection board 2j and are used in cooperation; when a wire is inserted between the pressure plate 2g and the connection board 2j and the connection screw 2e is screwed, the nut member 2f moves axially along the connection screw 2e, and meanwhile, the nut member 2f drives one end of the pressure plate 2g cooperating with the connection board 2j to lift, so as to press the wire between the pressure plate 2g and the connection board 2j. Further, the pressure plate 2g is in limit cooperation with the connection screw 2e to prevent the pressure plate 2g from moving away from the connection board 2j. Further, the nut member 2f is limited to prevent it from rotating, and when the connection screw 2e is screwed, the nut member 2f reciprocates along the axial direction of the connection screw 2e.

[0149] Preferably, as Figure 26 , 27 , shown in Fig. 29, both the upper pressure plate 2g1 and the lower pressure plate 2g2 are L-shaped structures. The upper pressure plate 2g1 includes an upper connection part 2g11 and an upper pressure part 2g10. The upper pressure part 2g10 includes a first pressure end and a first connection end which are respectively arranged at both ends thereof. The first pressure end is arranged oppositely to the connection board 2j and is used in cooperation. The first connection end is connected to one end of the upper connection part 2g11, and the width of the first connection end is greater than the width of the upper connection part 2g11. The lower pressure plate 2g2 includes a lower connection part 2g21 and a lower pressure part 2g20. The lower pressure part 2g20 includes a second pressure end and a second connection end which are respectively arranged at both ends thereof. The second pressure end is arranged oppositely to the connection board 2j and is used in cooperation. The second connection end is connected to one end of the lower connection part 2g21, and the width of the second connection end is greater than the width of the lower connection part 2g21. The other end of the lower connection part 2g21 is connected to the other end of the upper connection part 2g11. The first pressure end protrudes towards the direction where the connection board 2j is located and the second pressure end, and the second connection end protrudes towards the direction where the connection screw 2g is located and the first connection end.

[0150] Specifically, as Figure 27In the shown direction, the right ends of the upper wire pressing part 2g10 and the lower wire pressing part 2g20 are respectively arranged opposite to and used in cooperation with the wiring board 2j. The right end of the lower wire pressing part 2g20 protrudes towards the direction where the wiring board 2j is located (towards the right side) from the right end of the upper wire pressing part 2g10, and the left end of the upper wire pressing part 2g10 protrudes towards the direction where the wiring screw 2e is located (towards the left side) from the left end of the lower wire pressing part 2g20. The wiring screw 2e is arranged between the wire pressing plate mounting shaft 2h and the upper wire pressing part 2g10 (and is located between the wire pressing plate mounting shaft 2h and the lower wire pressing part 2g20). When the wiring screw 2e is screwed, the nut part 2f moves upward, and at the same time, it drives the right ends of the lower wire pressing part 2g20 and the upper wire pressing part 2g10 to lift upward, pressing the wire tightly. If the outer diameter of the wire is relatively thin, only the lower wire pressing part 2g20 is needed to press the wire tightly. If the outer diameter of the wire is relatively large, the lower wire pressing part 2g20 and the upper wire pressing part 2g10 cooperate to press the wire tightly, which is beneficial to improving the wiring reliability of the wiring terminal of the present invention, enabling the wiring terminal of the present invention to be applicable to the wiring operations of wires with various outer diameters. [[ID=~1]] [[ID=~2]]

[0151] [[ID=~3]]Preferably, as [[ID=~4]] Figure 27 [[ID=~5]]shown, the lower wire pressing plate 2g2 further includes a wire removing elastic piece 2g22 arranged in the middle of the lower wire pressing part 2g20. One end of the wire removing elastic piece 2g22 is connected to the lower wire pressing part 2g20, and the other end is arranged opposite to and used in cooperation with the upper wire pressing part 2g10. Further, as [[ID=~6]] Figure 27 [[ID=~7]]shown, the included angle γ between the wire removing elastic piece 2g22 and the lower wire pressing part 2g20 is less than 90°. When it is necessary to remove the wire from the wiring terminal of the present invention, the wiring screw 2e is screwed to make the nut part 2f move downward, and the wire removing elastic piece 2g22 can provide elastic force to release the wire by the lower wire pressing part 2g20, improving the convenience and efficiency of wire removal. [[ID=~8]] [[ID=~9]]

[0152] [[ID=~10]]Preferably, as [[ID=~11]] Figure 25 [[ID=~12]]、[[ID=~13]] 26 [[ID=~14]]、28 shown, the wiring terminal of the present invention further includes two relatively arranged fixing plates 2k. The wiring screw 2e, the nut part 2f, the wire pressing plate 2g and the wiring board 2j are all arranged between the two fixing plates 2k. The two fixing plates 2k limit the nut part 2f to prevent the nut part 2f from rotating, and both ends of the wire pressing plate mounting shaft 2h are respectively connected to the two fixing plates 2k. Further, as [[ID=~15]] Figure 25 [[ID=~16]]and [[ID=~17]] 28 [[ID=~18]]shown, the fixing plate 2k is provided with a nut part sliding groove 2k1, and each end of the nut part 2f is provided with a nut part sliding platform 22f. The two nut part sliding platforms 22f are respectively slidably arranged in the two nut part sliding grooves 2k1. Further, as [[ID=~19]] Figure 26 [[ID=~20]]shown, the fixing plate 2k is further provided with a wiring board limiting hole 2k3, and each of a pair of edges of the wiring board 2j is provided with a wiring board limiting platform 2j0. The two wiring board limiting platforms 2j0 are respectively arranged in the two wiring board limiting holes 2k3. [[ID=~21]] [[ID=~22]]

[0153] As Figure 25 and 26 shown, both ends of the wire pressing plate mounting shaft 25 are respectively connected to the upper parts of one ends of two fixing plates 2k. Specifically, both ends of the wire pressing plate mounting shaft 25 are respectively connected to the upper left corners of two fixing plates 2k; the wiring board 2j is arranged between the other ends of two fixing plates 2k. Specifically, both ends of the wiring board 2j are respectively connected to the right ends of two fixing plates 2k; one end of the wire pressing plate 2g is connected to the wire pressing plate mounting shaft 2h, and the other end is arranged opposite to the wiring board 2j and used in cooperation. The wire pressing plate 2g slopes downward from the end connected to the wire pressing plate mounting shaft 2h to the other end. Specifically, the wire pressing plate 2g slopes gradually downward from its left end to its right end; the wire pressing plate 2g is integrally in an L-shaped structure. The wiring screw 2e is arranged at the notch of the L-shaped structure of the wire pressing plate 2g and is in threaded cooperation with the nut member 2f arranged below the wire pressing plate 2g. Specifically, the wiring screw 2e is arranged on the front side of the upper connecting part 2g11 (lower connecting part 2g21) and is located on the left side of the upper wire pressing part 2g10 (lower wire pressing part 2g20).

[0154] Preferably, multiple transverse grooves or transverse ribs arranged side by side are provided on one side of the wiring board 2j facing the wire pressing plate 2g, and the extending direction of the transverse grooves or transverse ribs is perpendicular to the direction of wire insertion.

[0155] It should be noted that the wiring terminal of the present invention can be used in the plug-in circuit breaker of the present invention. The first outgoing line terminal 11 and the second outgoing line terminal 10 of the plug-in circuit breaker can adopt the wiring terminal of the present invention, which not only improves the wiring efficiency but also improves the wiring reliability. Further, an auxiliary wire removing hole is also provided on the circuit breaker housing. Each outgoing line terminal corresponds to and cooperates with an auxiliary wire removing hole. The auxiliary wire removing hole is arranged on one side of the wiring screw 2e and is arranged opposite to the wire pressing plate 2g. Further, the auxiliary wire removing hole is arranged opposite to the end of the wire pressing plate 2g that cooperates with the wiring board 2j. When removing the wire, if the wire pressing plate 2g cannot automatically release the wire, pressure can be applied to the wire pressing plate 2g through the auxiliary wire removing hole, so as to make the wire pressing plate 2g release the wire, which is beneficial to improving the wire removing efficiency.

[0156] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A plug-in circuit breaker comprising a circuit breaker housing and at least one protective pole, wherein the circuit breaker housing comprises at least one protective pole assembly cavity; Each protection pole comprises an operating button (1d), an operating mechanism (3) arranged in the protection pole assembly cavity and connected to the operating button (1d), a protection mechanism (4) driven and matched with the operating mechanism (3), an arc extinguishing system (5), a first incoming terminal (110), a first outgoing terminal (11), a moving contact (61) connected to the operating mechanism (3), and a stationary contact (62) matched with the moving contact (61); one end of the operating button (1d) is inserted into the circuit breaker housing, the operating button (1d) and the first outgoing terminal (11) are arranged at one end of the circuit breaker housing, and the first incoming terminal (110) is arranged at the other end of the circuit breaker housing; the arc extinguishing system (5) is arranged in the middle of the protection pole assembly cavity and on one side of the first incoming terminal (110); the operating mechanism (3) is arranged between the operating button (1d) and the arc extinguishing system (5); and the protection mechanism (4) is arranged on one side of the operating mechanism (3) and between the first outgoing terminal (11) and the arc extinguishing system (5); When the plug-in circuit breaker is in the closed state and a short circuit fault or an overload fault occurs, the protection mechanism (4) drives the operating mechanism (3) to operate, causing the plug-in circuit breaker to enter the open state. After the fault is eliminated, the operating button (1d) is pressed to move it in the closing direction, driving the operating mechanism (3) to operate, causing the plug-in circuit breaker to enter the closed state. The operating mechanism (3) includes a locking buckle (32) and a locking buckle (36) that are locked together; the protection mechanism (4) includes a magnetic yoke (40) and a bimetallic strip (42), wherein the magnetic yoke (40) is arranged on one side of the locking buckle (36), and the bimetallic strip (42) is arranged in the middle of the magnetic yoke (40) and located between the magnetic yoke (40) and the locking buckle (36), one end of the bimetallic strip (42) is fixedly arranged and electrically connected to the first output terminal (11), and the other end is driven and matched with the locking buckle (36) and electrically connected to the moving contact (61); when a short circuit fault occurs, the locking buckle (36) is attracted to swing in the direction of the magnetic yoke (40), thereby releasing the locking buckle with the jumping buckle (32); when an overload fault occurs, the bimetallic strip (42) drives the locking buckle (36) to swing in the direction of the magnetic yoke (40), thereby releasing the locking buckle (36) from the locking buckle with the jumping buckle (32).

2. The plug-in circuit breaker according to claim 1, characterized in that: The operating mechanism (3) further comprises a U-shaped connecting rod (35), an operating handle (30), a contact support rod (31), a lock reset spring (37), a main tension spring (33) and a trip reset spring (38); The operating handle (30) is pivotally arranged on the circuit breaker housing, one end of the operating handle (30) is connected to the operating button (1d) by driving through a U-shaped connecting rod (35), and the other end is connected to one end of a contact support rod (31) by rotation, and the other end of the contact support rod (31) is provided with a moving contact (61); one end of the trip button (32) is pivotally arranged on the circuit breaker housing, and the middle part is connected to one end of the contact support rod (31) provided with a moving contact (61) through a main tension spring (33); the middle part of the lock button (36) is rotatably arranged, one end is connected to the lock button reset spring (37), and the other end is locked with the other end of the trip button (32) and is driven by the protection mechanism (4); one end of the trip button reset spring (38) is connected to the circuit breaker housing, and the other end is connected to the trip button (32); When the plug-in circuit breaker is in a closed state and a short circuit fault or an overload fault occurs, the protection mechanism (4) drives the lock catch (36) and the trip catch (32) to release the lock fit, and the plug-in circuit breaker trips. The trip catch reset spring (38) drives the trip catch (32) to rotate, so that the trip catch (32) and the lock catch (36) are locked and fit again, and the plug-in circuit breaker enters an open state.

3. The plug-in circuit breaker according to claim 2, characterized in that: The jump button (32) is a U-shaped structure, comprising a first jump button arm (32a) and a second jump button arm (32b) arranged opposite to each other. The bottom of the U-shaped structure of the jump button (32) is arranged near one end of the operating handle (30) connected to the contact support rod (31). One end of the first jump button arm (32a) is pivotally arranged, and the other end is connected to the second jump button arm (32b). The other end of the second jump button arm (32b) is locked with a lock button (36).

4. The plug-in circuit breaker according to claim 3, characterized in that: The trip latch reset spring (38) is a torsion spring, which is sleeved on a trip latch reset spring shaft (380) located on one side of the trip latch first arm (32a), and the two ends of the trip latch reset spring shaft (380) are respectively fixed on the circuit breaker housing; a trip latch reset boss (323) is provided in the middle of the trip latch first arm (32a), one end of the trip latch reset spring (38) is connected to the circuit breaker housing, and the other end is connected to the trip latch reset boss (323).

5. The plug-in circuit breaker according to claim 3, characterized in that: The operating mechanism (3) further comprises a linkage member (44), the linkage member (44) comprising a linkage rod (440) and a linkage shaft (441) arranged at one end of the linkage rod (440), the two ends of the linkage shaft (441) being pivotally arranged on the circuit breaker housing, a polygonal hole (4410) being provided in the middle of the linkage shaft (441) along its axial direction, a linkage member actuated platform (442) being provided on the side of the linkage rod (440) opposite to the trip button (32); and a linkage member driving platform (322) being provided on the second arm (32b) of the trip button for driving and cooperating with the linkage member actuated platform (442); The plug-in circuit breaker includes a plurality of protection poles, wherein the linkage shafts (441) of the plurality of protection poles are connected via a linkage connecting shaft. When one of the protection poles trips, the linkage driving platform (322) of the tripping buckle (32) of the protection pole drives the linkage rod (440) to swing via the linkage driven platform (442). The linkage rod (440) drives the linkage shaft (441) to rotate, thereby driving the linkage rods (440) of other protection poles to swing, respectively striking the lock buckles (36) of the protection poles, thereby causing the protection poles to trip synchronously.

6. The plug-in circuit breaker according to claim 2, characterized in that: The contact support rod (31) is an overall bow-shaped structure, with a support rod rotating shaft (311) rotatably connected to the operating handle (30) provided at one end, and a moving contact (61) provided at the other end. The moving contact (61) includes a moving contact plate (610) connected to the contact support rod (31) and a moving contact point (611) provided at one end of the moving contact plate (610), and the other end of the moving contact plate (610) is connected to the main tension spring (33). An arc isolation plate (34) is also provided in the middle of the contact support rod (31). When the plug-in circuit breaker is in an open state, the arc isolation plate (34) enters between the moving contact (61) and the static contact (62); when the plug-in circuit breaker is in a closed state, the arc isolation plate (34) moves out from between the moving contact (61) and the static contact (62).

7. The plug-in circuit breaker according to claim 1, characterized in that: The middle part of the lock catch (36) is rotatably arranged on one end of the yoke (40); one end of the lock catch (36) is connected to the circuit breaker housing through a lock catch reset spring (37), and the other end is arranged opposite to the yoke (40); one end of the bimetallic strip (42) is fixedly arranged and electrically connected to the first output terminal (11) through the first conductive plate (2b), and the other end is electrically connected to the contact support rod (31) through the soft connection (63), and the static contact (62) is electrically connected to the first input terminal (110).

8. The plug-in circuit breaker according to claim 1, wherein: The cross section of the magnetic yoke (40) is a U-shaped structure. One end of the magnetic yoke 40 is provided with two magnetic yoke support arms (400) arranged opposite to each other, and the magnetic yoke support arms (400) are provided with a magnetic yoke limiting groove (401); the lock (36) includes a lock reset end (360), a lock support arm (361), a lock body (362), a lock hole (363) and a lock actuated end (364), the lock reset end (360), the lock body (362) and the lock actuated end (364) are connected in sequence, and the lock reset end A lock support arm (361) is provided on each side of the connection between the (360) and the lock body (362); the lock driven end (364) is an L-shaped structure, one end is connected to the lock body (362) by bending, and the other end is driven by the bimetallic strip (42); the two lock support arms (361) are respectively arranged in the two yoke limiting grooves (401); the lock body (362) and the yoke (40) are arranged opposite to each other; the lock hole (363) is arranged on the lock body (362) and is locked with the jump buckle (32).

9. The plug-in circuit breaker according to claim 1, characterized in that: The arc extinguishing system (5) comprises an arc extinguishing chamber (50) and a movable contact arc striking plate (51) and a stationary contact arc striking plate (52) respectively arranged on both sides of the arc extinguishing chamber (50); the movable contact arc striking plate (51) cooperates with the movable contact (61) and is electrically connected to the first output terminal (11); one end of the stationary contact arc striking plate (52) is provided with a stationary contact (62), and the other end is electrically connected to the first input terminal (110).

10. The plug-in circuit breaker according to claim 1, wherein: The invention also includes a locking mechanism, the locking mechanism including a first locking member (9), one end of the first locking member (9) is slidably arranged in the circuit breaker housing, and the other end is a first protrusion (90) protruding outside the circuit breaker housing; When the plug-in circuit breaker is assembled in the circuit breaker assembly position, the housing of the circuit breaker assembly position squeezes the first protrusion (90), so that the first locking member (9) moves as a whole toward the inside of the circuit breaker housing. After the plug-in circuit breaker is assembled in place, the first protrusion (90) protrudes outside the circuit breaker housing and cooperates with the housing limit of the circuit breaker housing assembly position.

11. The plug-in circuit breaker according to claim 10, characterized in that: The locking mechanism further comprises a second locking member (8), the middle portion of which is rotatably arranged, one end of which is driven to cooperate with the operating button (1d), and the other end of which is driven to cooperate with the first locking member (9); when the plug-in circuit breaker is in an open state, the operating button (1d) is pulled out, and the first protrusion (90) is driven to move toward the inside of the circuit breaker housing through the second locking member (8), thereby releasing the limiting cooperation between the first protrusion (90) and the housing of the circuit breaker assembly position.

12. The plug-in circuit breaker according to claim 11, characterized in that: The second locking member (8) further includes a second protrusion (82), and the second protrusion (82) is provided at one end of the second locking member (8) that cooperates with the first locking member (9); When the plug-in circuit breaker is in a closed state, the operating button (1d) drives the second locking member (8) so that the second protrusion (82) protrudes outside the circuit breaker housing; when the plug-in circuit breaker is in an open state, the operating button (1d) drives the second locking member (8) so that the second protrusion (82) moves into the circuit breaker housing.

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