Plug-in circuit breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a plug-in circuit breaker, which comprises a protection pole, wherein one end of an operation button of the protection pole is inserted into a circuit breaker housing, the operation button and a first outlet terminal and a first incoming terminal are respectively arranged at two ends of the circuit breaker housing, an arc extinguishing system is arranged in the middle of a protection pole assembly cavity and is located on one side of the first incoming terminal, an operating mechanism is arranged between the operation button and the arc extinguishing system, and a protection mechanism is arranged between the first outlet terminal and the arc extinguishing system and is located on one side of the operating mechanism; the plug-in circuit breaker is in a closed state, and the operating mechanism is in a locked state; when a short circuit or overload occurs, the protection mechanism drives the operating mechanism to trip, the plug-in circuit breaker trips and the operating mechanism enters a tripped state, the operation button is pulled to move it in an opening direction, the operating mechanism is driven to return to the locked state, and the plug-in circuit breaker enters an opening state; the plug-in circuit breaker of the present invention has a compact structure and a small volume.

Description

Technical Field

[0001] The 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, a standard cabinet is a 1U working unit, and its height is about 44.45mm. With the rapid development of communications technology, the components inside the cabinet need to be continuously miniaturized to meet the installation size requirements of the 1U unit, so as to increase the density of components inside the cabinet and save the overall volume of communication equipment.

[0003] The height of existing ordinary small circuit breakers is usually between 80mm and 90mm. In addition, the space for wiring the wires at the input and output ends requires a height of 3U, which restricts the development of miniaturization of communication cabinets. In addition, the outlet end of ordinary small circuit breakers is located inside the cabinet, which is not conducive to user wiring. Furthermore, if ordinary small circuit breakers are added with auxiliary signal functions, it is often necessary to add auxiliary contact accessories or other similar functional accessories on the side of the circuit breaker to achieve this, which increases the cost of use and occupies more installation space, which is not conducive to 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, comprising a circuit breaker housing and at least one protection pole, wherein the circuit breaker housing is provided with at least one protection pole assembly cavity; each protection pole comprises an operation button 1d, and an operation mechanism 3 arranged in the protection pole assembly cavity and connected to the operation button 1d, a protection mechanism 4 driven and matched with the operation mechanism 3, an arc extinguishing system 5, a first incoming terminal 110, a first outgoing terminal 11, a moving contact 61 connected to the operation mechanism 3, and a stationary contact 62 used in match with the moving contact 61;

[0007] One end of the operation button 1d is inserted into the circuit breaker housing, the operation button 1d and the first outlet terminal are arranged at one end of the circuit breaker housing, and the first inlet 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 is located on one side of the first inlet 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 outlet terminal 11 and the arc extinguishing system 5 and is located on one side of the operating mechanism 3;

[0008] The plug-in circuit breaker is in the closed state, and the operating mechanism 3 is in the locked state. When a short circuit fault or an overload fault occurs, 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. Pulling the operating button 1d moves it in the opening direction, drives the operating mechanism 3 to return to the locked state, and the plug-in circuit breaker enters the opening state.

[0009] Preferably, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a trip buckle 32, a lock buckle 36, a lock buckle reset spring 37 and a main tension spring 33;

[0010] The operating handle 30 is pivotally set on the circuit breaker housing, one end of the operating handle 30 is connected to the operating button 1d by a 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 trip button 32 is pivotally set 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 pulling spring 33; the lock buckle 36 is rotatably set in the middle part, one end is connected to the lock buckle reset spring 37, and the other end is locked with the other end of the trip buckle 32 and driven by the protection mechanism 4.

[0011] Preferably, the jump latch 32 is a U-shaped structure, including a first jump latch arm 32a and a second jump latch arm 32b that are relatively arranged. The bottom of the U-shaped structure of the jump latch 32 is arranged near the end connected to the operating handle 30 and the contact support rod 31. One end of the first jump latch arm 32a is pivotally arranged, and the other end is connected to one end of the second jump latch arm 32b. The other end of the second jump latch arm 32b is locked with the lock 36.

[0012] 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.

[0013] Preferably, the operating mechanism 3 further includes a linkage member 44, the linkage member 44 includes a linkage rod 440 and a linkage shaft 441 arranged at one end of the linkage rod 440, both ends of the linkage shaft 441 are respectively pivotally arranged on the circuit breaker housing, a polygonal hole 4410 is arranged in the middle of the linkage shaft 441 along its axial direction, and a linkage member actuated platform 442 is arranged on the side of the linkage rod 440 opposite to the jump button 32; the jump button second arm 32b is provided with a linkage member driving platform 322 drivingly matched 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 through a linkage connecting shaft, and the linkage connecting shaft is respectively matched with the polygonal hole 4410 of each linkage 44. When a certain protection pole 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 driven platform 442, and the linkage rod 440 drives the linkage shaft 441 to rotate, driving the linkage rods 440 of other protection poles to swing, and respectively knock the lock buckle 36 of each protection pole, so that each protection pole trips synchronously.

[0015] 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 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 drivingly matched with the lock 36 and electrically connected to the moving contact 61;

[0016] When a short circuit fault occurs, the lock buckle 36 is attracted to swing in 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 in the direction of the yoke 40, releasing the lock fit with the jump buckle 32.

[0017] 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 set 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.

[0018] Preferably, the cross section of the yoke 40 is a U-shaped structure, one end of the yoke 40 is provided with two yoke support arms 400 arranged opposite to each other, and the yoke support arm 400 is provided with a yoke limit 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 360, the lock body 362 and the lock actuated end 364 are connected in sequence, and the lock reset end 360, the lock body 362 and the lock actuated end 364 are connected in sequence. A lock support arm 361 is provided on each side of the connection between the positioning end 360 and the lock body 362. The lock actuated end 364 is an L-shaped structure, one end of which is bent and connected to the lock body 362, and the other end is driven and cooperated with the bimetallic strip 42. The two lock support arms 361 are respectively arranged in the two yoke limit grooves 401, the lock body 362 is arranged opposite to the yoke 40, and the lock hole 363 is arranged on the lock body 362 to cooperate with the jump buckle 32.

[0019] Preferably, the arc extinguishing system 5 includes an arc extinguishing chamber 50 and a moving 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 moving contact arc striking plate 51 cooperates with the moving contact 61 and is electrically connected to the first output terminal 11, and the stationary contact arc striking plate 52 is provided with a stationary contact 62 at one end, and the other end is electrically connected to the first input terminal 110.

[0020] Preferably, it also includes an exhaust port 16 and an auxiliary signal terminal electrically connected to the first output terminal 11, the exhaust port 16, the auxiliary signal terminal and the first input terminal 110 are arranged at the same end of the circuit breaker housing, and a first exhaust channel is also provided in the protective pole assembly cavity, one end of the first exhaust channel is connected to the 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.

[0021] Preferably, a locking mechanism is further included, the locking mechanism comprising a first locking member 9, one end of the first locking member 9 is slidably disposed in 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 to 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 position of the circuit breaker assembly position.

[0023] Preferably, the locking mechanism also includes a second locking piece 8, which is rotatably arranged in the middle, 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 piece 9; when the plug-in circuit breaker is in the 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 piece 8, thereby releasing the limiting 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 that cooperates 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 piece 8 to rotate, so that the second protrusion 82 protrudes outside the circuit breaker housing; when the plug-in circuit breaker is in the open state, the operation button 1d drives the second locking piece 8 to rotate, so that the second protrusion 82 moves into the circuit breaker housing.

[0026] In the plug-in circuit breaker of the present invention, the protection mechanism is arranged between the first outlet terminal and the arc extinguishing system and is located on one side of the operating mechanism. The layout of the protection pole is more compact, which significantly reduces the volume of the plug-in circuit breaker, is beneficial to saving the internal space of the communication cabinet, and conforms to the miniaturization development trend of the communication cabinet.

[0027] In addition, the protection mechanism has a simple structure, and the lock is directly driven by the magnetic yoke, which ensures the short-circuit protection and overload protection functions while significantly reducing the assembly space occupied by it, which is conducive to reducing the volume of the plug-in circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a plug-in circuit breaker of the present invention, which at least shows the appearance structure of the plug-in circuit breaker;

[0029] Figure 2 It is a structural schematic diagram of a neutral pole of a plug-in circuit breaker of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the protection pole of the plug-in circuit breaker of the present invention;

[0031] Figure 4 is another structural schematic diagram of the protection pole of the plug-in circuit breaker of the present invention;

[0032] Figure 5 is a schematic structural diagram of the first embodiment of the operating mechanism of the present invention, in which the plug-in circuit breaker is in an open state;

[0033] Figure 6 is a schematic structural diagram of a first embodiment of the operating mechanism of the present invention, when the plug-in circuit breaker is in a closed state;

[0034] Figure 7 is a schematic structural diagram of a first embodiment of the operating mechanism of the present invention, in which the plug-in circuit breaker is in a tripping state;

[0035] Figure 8 is a schematic structural diagram of a second embodiment of the operating mechanism of the present invention, in which the plug-in circuit breaker is in a closed state;

[0036] Fig. 9 is a schematic structural diagram of a second embodiment of the operating mechanism of the present invention, in which the plug-in circuit breaker is in an open state;

[0037] Fig.10 is an exploded view of the locking mechanism of the present invention;

[0038] Fig.11 is another exploded view of the locking mechanism of the present invention;

[0039] Fig.12 is a schematic diagram of the structure of the indicator of the present invention, at least showing the horizontal arm of the indicator and the vertical arm of the indicator;

[0040] Fig.13 is a schematic diagram of the structure of the indicator of the present invention, at least showing the track axis of the indicator;

[0041] Fig.14 is a schematic structural diagram of a first locking member of the present invention, showing at least a first protrusion, a first actuated protrusion and a second actuated protrusion;

[0042] Fig.15 is a schematic structural diagram of the first locking member of the present invention, at least showing the locking member spring limiting groove and the first track groove;

[0043] Fig.16 is a schematic diagram of the structure of the locking mechanism of the present invention, when the plug-in circuit breaker is in the open state;

[0044] Fig.17 is a schematic diagram of the structure of the locking mechanism of the present invention, when the plug-in circuit breaker is in a closed state;

[0045] Fig.18 is a schematic structural diagram of the locking mechanism of the present invention, which at least shows the matching relationship between the second locking member driving portion of the second locking member and the second actuated protrusion;

[0046] Fig.19 is a schematic structural diagram of a first embodiment of a wiring terminal of the present invention;

[0047] Fig. 20 is another structural schematic diagram of the first embodiment of the wiring terminal of the present invention;

[0048] Fig.21 is a third structural schematic diagram of the first embodiment of the wiring terminal of the present invention;

[0049] Fig. 22 is a schematic structural diagram of a second embodiment of a wiring terminal of the present invention;

[0050] Fig.23 is another structural schematic diagram of the second embodiment of the wiring terminal of the present invention;

[0051] Fig.24 is a third structural schematic diagram of the second embodiment of the wiring terminal of the present invention;

[0052] Fig.25 is a schematic diagram of the assembly structure of a third embodiment of the wiring terminal of the present invention;

[0053] Fig.26 is an exploded schematic diagram of a third embodiment of a terminal block of the present invention;

[0054] Fig. 27 is a schematic structural diagram of a third embodiment of a terminal block of the present invention, which at least shows the positional relationship and connection relationship among a terminal screw, a nut member, a wire pressing plate, and a wire pressing plate mounting shaft;

[0055] Fig.28 is a schematic structural diagram of a nut member of a terminal block according to a third embodiment of the present invention;

[0056] Fig.29 is a schematic structural diagram of a wire pressing plate of a wiring terminal according to a third embodiment of the present invention;

[0057] Fig.30 1 is another schematic structural diagram of a wire pressing plate of a wiring terminal according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0058] The following is combined with Figure 1-30 The following embodiments are provided to further illustrate the specific implementation of the plug-in circuit breaker of the present invention. The plug-in circuit breaker of the present invention is not limited to the description of the following embodiments.

[0059] The plug-in circuit breaker of the present invention comprises a circuit breaker housing and at least one protection pole, the circuit breaker housing comprises at least one protection pole assembly cavity, and the protection pole assembly cavity cooperates with the protection pole one-to-one; each of the protection poles comprises an operation button 1d, and an operating mechanism 3 arranged in the protection pole assembly cavity and connected to the operation button 1d, a protection mechanism 4 driven and cooperated 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 used in cooperation with the moving contact 61.

[0060] It should be pointed out that the plug-in circuit breaker of the present invention can be configured as a single-pole circuit breaker (i.e., a circuit breaker with only one protective pole), or a two-pole circuit breaker with one protective pole, or a two-pole circuit breaker with two protective poles, or a three-pole circuit breaker with three protective poles, or a four-pole circuit breaker with three protective poles, or a four-pole circuit breaker with four protective poles, as required.

[0061] Preferably, Figure 2 and 3As shown, one end of the operating button 1d is inserted into the circuit breaker housing, the operating button 1d and the first outlet terminal 11 are arranged at one end of the circuit breaker housing, and the first input 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 is located on the side of the first input 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 between the first outlet terminal 11 and the arc extinguishing system 5 and is located on the side of the operating mechanism 3. The plug-in circuit breaker of the present invention has a more compact layout of the protection pole, which significantly reduces the volume of the plug-in circuit breaker, is conducive to saving the internal space of the communication cabinet, and is in line with the miniaturization development trend of the communication cabinet. Specifically, as Figure 2-3 In the direction shown, 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, occupying about 3 / 5 of the width of the circuit breaker housing.

[0062] Preferably, Figure 6 As shown, the plug-in circuit breaker is in the closed state, the operating mechanism 3 is in the locked state, and when a short circuit fault or an overload fault occurs, 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 (such as Figure 7 As shown), pull the operating button 1d to move it in the opening direction, drive the operating mechanism 3 to return to the locked state, and the plug-in circuit breaker enters the opening state (as shown Figure 5 Further, as Figure 3-7 As shown, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a tripping catch 32, a lock catch 36, a lock reset spring 37 and a main pull spring 33; 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 through the U-shaped connecting rod 35, and the other end is 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 catch 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 the moving contact 61 through the main pull spring 33; the middle part of the lock catch 36 is rotatably arranged, one end is connected to the lock reset spring 37, and the other end is locked with the other end of the tripping catch 32 and is driven and matched with the protection mechanism 4. Further, one end of the lock catch 36 is connected to the circuit breaker housing through the lock reset spring 37.

[0063] Preferably, Figure 8 As shown, the plug-in circuit breaker is in the closed state. When a short circuit fault or overload fault occurs, the protection mechanism 4 drives the operating mechanism 3 to operate, so that the plug-in circuit breaker enters the open state (such as Fig. 9As shown), after the fault is eliminated, press the operating button 1d to move it in the closing direction, drive the operating mechanism 3 to act, and the plug-in circuit breaker enters the closing state. Figure 3 , 8 -9, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a tripping buckle 32, a lock buckle 36, a lock buckle reset spring 37, a main pull spring 33 and a tripping buckle 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 through the U-shaped connecting rod 35, and the other end is 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 buckle 32 is pivotally arranged on the circuit breaker housing, and the middle part is connected to the contact support rod 31 through the main pull spring 33 and one end of the moving contact 61 is provided The lock catch 36 is rotatably arranged in the middle part, one end of which is connected to the circuit breaker housing through the lock catch reset spring 37, and the other end is driven and matched with the protection mechanism 4 and locked with the trip catch 32; one end of the trip catch reset spring 38 is connected to the circuit breaker housing, and the other end is connected to the trip catch 32; when the plug-in circuit breaker is in the closed state and a short circuit fault or overload fault occurs, the protection mechanism 4 drives the lock catch 36 to release the lock match with the trip catch 32, and the plug-in circuit breaker trips, and the trip catch reset spring 38 drives the trip catch 32 to make the trip catch 32 and the lock catch 36 lock again, and at the same time the plug-in circuit breaker enters the open state.

[0064] Preferably, Figure 3-9 As shown, the protection mechanism 4 includes a yoke 40 and a bimetal 42, the yoke 40 is arranged on one side of the lock 36, the bimetal 42 is arranged in the middle of the yoke 40 and between the yoke 40 and the lock 36, one end of the bimetal 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; when the plug-in circuit breaker is in the closed state and a short circuit fault occurs, the lock 36 is attracted to swing in the direction of the yoke 40, and the lock match with the tripping buckle 32 is released; when the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetal 42 bends and drives the lock 36 to swing in the direction of the yoke 40, and the lock match with the tripping buckle 32 is released. The protection mechanism 4 of the present invention has both short-circuit protection and overload protection functions, and has a simple and compact structure. While reliably completing the protection function, it can effectively reduce the required assembly space, which is conducive to the miniaturization development trend of plug-in circuit breakers.

[0065] Preferably, Figure 1-4As shown, the plug-in circuit breaker of the present invention further includes at least two auxiliary signal terminals pluggable and connected to the external circuit; the moving contact 61 is electrically connected to the first outlet terminal 11, the static contact 62 is electrically connected to the first input terminal 110, each auxiliary signal terminal is electrically connected to the first output terminal 11, and a signal processing element is connected in series between at least one auxiliary signal terminal and the first output 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 input terminal 100 and a second output terminal 10, the second input terminal 100 and the first input terminal 110 are arranged side by side at one end of the circuit breaker housing, the second output terminal 10 and the first output 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 input terminal 110 and the second input terminal 100. The plug-in circuit breaker of the present invention has an auxiliary signal terminal that utilizes a moving / static contact to generate an auxiliary signal, which saves space and cost for installing auxiliary contacts or similar accessories, is conducive to simplifying the structure of the circuit breaker, and conforms to the trend of miniaturization of plug-in circuit breakers; and the auxiliary signal terminal outputs a signal that can be used to determine the opening / closing state of the plug-in circuit breaker, for example, to achieve remote monitoring.

[0066] Preferably, Figure 10-18 As shown, the plug-in circuit breaker of the present invention has one end of the operation button 1d inserted in 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 arranged in the middle thereof and an indicator hole 12d arranged 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 also includes an indicator 7, one end of which is provided with a closing indicator surface 70 and an opening indicator surface 71 respectively matched with the indicator hole 12d; When the plug-in circuit breaker is in the opening state, the opening indication surface 71 is arranged opposite to the indication hole 12d. The operation button 1d is pressed to move it in the closing direction, and the indicator 7 moves as a whole in the indicator slot. After the plug-in circuit breaker enters the closing state, the closing indication surface 70 is arranged opposite to the indication hole 12d. The operation button 1d is pulled to move it in the opening direction, and the indicator 7 moves as a whole in the indicator slot. After the plug-in circuit breaker enters the opening state, the opening indication surface 71 is arranged opposite to the indication hole 12d.

[0067] Furthermore, the moving direction of the operation button 1d is perpendicular to the moving direction of the indicator 7 in the indicator slot.

[0068] Further, such as Fig.10 and 12As shown, the operation button 1d also includes an indicator slide groove 100d respectively arranged on a pair of side walls of the indicator slot, and the extension direction of the indicator slide groove 100d is perpendicular to the moving direction of the operation button 1d; the indicator 7 also includes two indicator slides 72 respectively arranged on a pair of side surfaces thereof, and the indicator slide 72 is slidably arranged in the indicator slide groove 100d.

[0069] Further, such as Fig.10 , 11 As shown in FIG. 13 , the indicator 7 also includes an indicator track shaft 75 arranged at the other end thereof; an indicator track groove is provided on the circuit breaker housing, and the indicator track shaft 75 is slidably arranged in the indicator track groove. When the operation button 1d is pressed / pulled, the indicator track groove drives the indicator 7 to move as a whole in the indicator slot through the indicator track shaft 75, so that the closing indication surface 70 / opening indication surface 71 is arranged opposite to the indication hole 12d.

[0070] The plug-in circuit breaker of the present invention has an indicator 7 inserted in an indicator slot provided in the operating button 1d, which occupies less space and is conducive to the miniaturized design of the circuit breaker. The closing indication surface 70 and the opening indication surface 71 of the indicator 7 can be respectively arranged opposite to the indication hole 12d. The user can visually observe through the indication hole 12d and quickly determine the opening / closing state of the circuit breaker. Moreover, the indicator moves as a whole in the indicator slot to realize the switching of the closing indication surface and the opening indication surface displayed in the indication hole. The movement of the indicator is more accurate and the error is small, so that the closing indication surface or the opening indication surface completely fills the indication hole, avoiding the situation where the closing indication surface and the opening indication surface are displayed in the indication hole at the same time, resulting in the user's misjudgment, which is conducive to improving the user's electricity safety. The indicator slide groove 100d cooperates with the indicator slide 72 to limit the moving path of the indicator 7 and ensure the reliability of the indication result.

[0071] like Figure 1-4 FIG. 1 is an embodiment of the plug-in circuit breaker of the present invention.

[0072] The plug-in circuit breaker of the present invention comprises a circuit breaker housing and at least one protection pole, the circuit breaker housing comprises at least one protection pole assembly cavity, and the protection pole assembly cavity is matched with the protection pole one-to-one; each of the protection poles comprises an operation button 1d, and an operation mechanism 3 arranged in the protection pole assembly cavity and connected to the operation button 1d, a protection mechanism 4 driven and matched with the operation mechanism 3, an arc extinguishing system 5, a first incoming terminal 110, a first outgoing terminal 11, a moving contact 61 connected to the operation mechanism 3, and a stationary contact 62 used in match 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 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 is located on one side of the first incoming terminal 110, the operation 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 is located on one side of the operation mechanism 3.

[0073] Specifically, Figure 1-2 As shown, 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 also 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 matches the protection pole one-to-one, and the base 1b and the rear cover 1a enclose a neutral pole assembly cavity that matches the neutral pole; the circuit breaker housing includes an upper side 101 and a lower side 102, a front side 105 and a rear side 106, and a left side 103 and a right side 104. Figure 3-4 As shown, the lower end of the operation button 1d is inserted into the circuit breaker housing, the operation button 1d and the first outlet terminal 11 are arranged at the upper end of the circuit breaker housing, the first input terminal 110 is arranged at the lower end of the circuit breaker housing, the arc extinguishing system 5 is arranged in the middle of the protection pole assembly cavity and is located on the upper side of the first input 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 outlet terminal 11 and the arc extinguishing system 5 and is located on the left side of the operating mechanism 3.

[0074] Preferably, Figure 1-2 As shown, the neutral pole 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 the lower end of the circuit breaker housing, the second outgoing terminal 10 and the first outgoing terminal 11 are arranged side by side at the upper end of the circuit breaker housing, and the second incoming terminal 100 is electrically connected to the second outgoing terminal 10 through the second conductive plate 2a. Specifically, as Figure 1In the direction shown, the first incoming terminal 110 and the second incoming terminal 100 are respectively arranged at the right and left parts of the lower end of the circuit breaker housing; the first outgoing terminal 11 and the second outgoing terminal 10 are both arranged on the left side of the operation button 1d.

[0075] Preferably, Figure 2 As shown, the first incoming terminal 110 and the second incoming terminal 100 each include a first elastic element 2c, each first elastic element 2c includes a first spring connecting plate and two first spring clamping plates arranged opposite to each other, the two first spring clamping plates are respectively connected to the two ends of the first spring connecting plate by bending, each first spring clamping plate is a "〈" structure, and the two first spring clamping plates form an X-shaped structure as a whole.

[0076] like Figure 3-7 FIG. 1 shows a first embodiment of the operating mechanism 3 of the plug-in circuit breaker of the present invention.

[0077] 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 catch 32, a lock catch 36, a lock catch reset spring 37 and a main tension spring 33; 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 through the U-shaped connecting rod 35, and the other end is 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 catch 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 the moving contact 61 through the main tension spring 33; the middle part of the lock catch 36 is rotatably arranged, one end is connected to the lock catch reset spring 37, and the other end is driven and matched with the protection mechanism 4 and locked with the other end of the tripping catch 32. Further, one end of the reset spring 37 is connected to one end of the lock catch 36, and the other end is connected to the circuit breaker housing. Specifically, the reset spring 37 can be a torsion spring or a straight spring.

[0078] Further, such as Figure 3-7 As shown, the jump buckle 32 is a U-shaped structure (see Figure 6 ), including a first arm 32a and a second arm 32b arranged opposite to each other, the bottom of the U-shaped structure of the trip latch 32 is arranged near the end connected to the operating handle 30 and the contact support rod 31, one end of the first arm 32a of the trip latch is pivotally arranged, and the other end is connected to one end of the second arm 32b of the trip latch, and the other end of the second arm 32b of the trip latch is locked with the lock 36.

[0079] Further, such as Figure 3-7 As shown, the contact support rod 31 is an overall bow-shaped structure, one end of which is provided with a support rod shaft 311 rotatably connected to the operating handle 30, and the other end of which 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 arranged at one end of the moving contact 610, and the other end of the moving contact plate 610 is connected to the main tension spring 33. Further, the middle part of the contact support rod 31 is also provided with an arc isolation plate 34 (see Figure 3 ), when the plug-in circuit breaker is in the open state, the arc isolation plate 34 enters between the moving contact 61 and the stationary contact 62, and 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 stationary contact 62.

[0080] Further, such as Figure 5-7 As shown, the contact support 3 also includes a linkage member 44, which includes a linkage rod 440 and a linkage shaft 441 arranged at one end of the linkage rod 440, and the two ends of the linkage shaft 441 are respectively pivotally arranged on the circuit breaker housing, and the middle part of the linkage shaft 441 is provided with a polygonal hole 4410 along its axial direction, and a linkage member actuated platform 442 is provided on the side of the linkage rod 440 opposite to the jump button 32; the second arm 32b of the jump button is provided with a linkage member driving platform 322 driving and cooperating with the linkage member actuated platform 442; the plug-in circuit breaker includes multiple The protection pole, the linkage shafts 441 of the multiple protection poles are connected through the linkage connecting shaft, and the linkage connecting shafts are respectively matched with the polygonal holes 4410 of each linkage 44. When a certain protection pole 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, and the linkage rod 440 drives the linkage shaft 441 to rotate. The linkage shaft 441 drives the linkage rods 440 of other protection poles to swing through the linkage connecting shaft, and respectively knocks the lock buckle 36 of each protection pole, so that each protection pole trips synchronously. Further, the linkage 44 of each protection pole can be connected through a linkage connecting shaft, or two adjacent protection poles can be connected through a linkage connecting shaft.

[0081] Specifically, Figure 4-7In the direction shown, the trip button 32 and the contact support rod 31 are both arranged below the operating handle 30. The upper end of the operating handle 30 is connected to the operating button 1d through a U-shaped connecting rod 35, the middle part is pivotally arranged 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 button 32 is a U-shaped structure with an opening facing downward, including a second trip button arm 32b and a first trip button arm 32a respectively arranged on the left and right sides thereof, and the lower end of the first trip button arm 32a is pivotally arranged on the circuit breaker housing , the upper end is connected to the upper end of the second arm 32b of the jump buckle, the lower end of the second arm 32b of the jump buckle is locked with the lock buckle 36, the middle part of the jump buckle 32 is connected to the upper end of the moving contact plate 610 of the contact support rod 31 through the main pull spring 33; the upper end of the contact support rod 31 is stacked on the front side of the middle part of the jump buckle 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 provided on the right side of the lower end of the moving contact 610, and the upper end is connected to the lower end of the main pull spring 33; the left end of the arc isolation plate 34 is connected to the lower end of the contact support rod 31 The right end is connected to the moving contact 61 and the static contact 62, and extends between the moving contact 61 and the static contact 62 when opening the switch, and moves out between the moving contact 61 and the static contact 62 when closing the switch; preferably, a support rod-arc isolation plate limiting groove is provided on the contact support rod 31, and when the contact support rod 31 drives the moving contact 61 and the static contact 62 to open and close the switch, the support rod-arc isolation plate limiting groove drives the arc isolation plate 34 to extend into and move out between the moving and static contacts and limits the swing amplitude of the right end of the arc isolation plate 34; the lock buckle 36 is arranged on the jump buckle 32 The left side of the connecting rod 440 is pivotally arranged in the middle, the upper end is connected to the circuit breaker housing through the lock reset spring 37, and the lower end is locked with the lower end of the second arm 32b of the tripping latch 32; the linkage member 44 is arranged between the lock 36 and the tripping latch 32, the upper end of the linkage rod 440 is pivotally arranged through the linkage shaft 441, and the middle part of the linkage rod 440 is provided with a linkage member actuating platform 442 on the right side below the linkage shaft 441, and the upper left side of the second arm 32b of the tripping latch is provided with a linkage member driving platform 322 drivingly matched with the linkage member actuating platform 442. Preferably, as Figure 4 As shown, the operating handle 30 is pivotally mounted on the circuit breaker housing via the operating handle mounting shaft 14. Further, the two ends of the operating handle mounting shaft 14 are pivotally connected to the front cover 1c and the base 1b respectively. Figure 5-7 As shown, the operating handle 30 also includes an operating handle-connecting rod hole that cooperates with the U-shaped connecting rod 35, an operating handle-supporting rod hole that cooperates with the support rod rotating shaft 311 of the contact support rod 31, and an operating handle shaft hole that cooperates with the operating handle mounting shaft 14; the operating handle 30 is approximately a triangle, and the operating handle-connecting rod hole, the operating handle shaft hole and the operating handle-supporting rod hole are respectively arranged at the three vertices of a triangle.

[0082] Preferably, Figure 4As shown, the lower end of the first arm 32a of the tripping latch 32 is pivotally mounted on the circuit breaker housing via the tripping latch mounting shaft 15. Further, the two ends of the tripping latch mounting shaft 15 are pivotally connected to the front cover 1c and the base 1b respectively. Figure 5 As shown, the middle of the jump button 32 is provided with a jump button-spring connecting hole 320 connected to one end of the main tension spring 33, and the upper end of the moving touch plate 610 is provided with a moving touch plate-spring connecting hole 310. Preferably, as Figure 5 As shown, the lower end of the second arm 32b of the jump buckle is a wedge-shaped structure, and the lower end of the lock buckle 36 is provided with a lock buckle hole 363 that locks with the lower end of the second arm 32b of the jump buckle.

[0083] like Figure 8-9 FIG. 2 shows a second embodiment of the operating mechanism 3 of the plug-in circuit breaker of the present invention.

[0084] The difference between the operating mechanism 3 of the second embodiment and the first embodiment is that: it also includes a trip reset spring 38, one end of which is connected to the circuit breaker housing, and the other end is connected to the trip 32; when the plug-in circuit breaker is in the closed state, and a short circuit fault or overload fault occurs, the protection mechanism 4 drives the lock 36 and the trip 32 to release the lock, the plug-in circuit breaker trips, and the trip reset spring 38 drives the trip 32 to rotate, so that the trip 32 and the lock 36 are locked again, and the plug-in circuit breaker enters the open state. Further, the trip reset spring 38 is a torsion spring, which is sleeved on the trip reset spring shaft 380 located on one side of the first arm 32a of the trip, and the two ends of the trip reset spring shaft 380 are respectively fixed on the circuit breaker housing; the middle part of the first arm 32a of the trip is provided with a trip reset boss 323, one end of the trip reset spring 38 is connected to the circuit breaker housing, and the other end is connected to the trip 32.

[0085] Specifically, Figure 8-9 As shown, after the lock catch 36 and the jump catch 32 are released from the lock fit, the jump catch 32 rotates counterclockwise and the contact support rod 31 rotates clockwise. After the contact support rod 31 drives the moving contact 61 to enter the tripped position, the jump catch reset spring 38 rotates the jump catch 32 clockwise through the jump catch reset boss 323 until the lower end of the second arm 32b of the jump catch is re-locked with the lock catch 36.

[0086] like Figure 3-9 FIG. 1 shows an implementation of the protection mechanism 4 of the plug-in circuit breaker of the present invention.

[0087] 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 is 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 output terminal 11, and the other end is driven and matched with the lock 36 and 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 lock 36 is attracted to swing in the direction of the yoke 40 to release the lock match with the tripping buckle 36. When the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetallic strip 42 drives the lock 36 to swing in the direction of the yoke 40 to release the lock match with the tripping buckle 32.

[0088] Specifically, Figure 5-9 In the direction shown, the yoke 40 is arranged on the left side of the lock 36, the bimetal 42 is arranged in the middle of the yoke 40 and is located between the yoke 40 and the lock 36, the upper end of the lock 36 is fixed, the middle part is rotatable, the lower end is arranged opposite to the yoke 40, driven and matched with the bimetal 42, and locked and matched with the trip buckle 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, and the magnetic field is strengthened by the yoke 40, and the lower end of the lock 36 is attracted to swing in the direction of the yoke 40, thereby releasing the lock and match with the trip buckle 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 lock 36 to swing in the direction of the yoke 40, thereby releasing the lock and match with the trip buckle 32.

[0089] Preferably, Figure 5-9 As shown, the middle part of the lock 36 is rotatably arranged 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 arranged and electrically connected to the first outlet terminal 11 through the first conductive plate 2b (see Figure 3 ), the other end is electrically connected to the contact support rod 31 through the flexible connection 63, and the static contact 62 is electrically connected to the first incoming terminal 110. Further, the protection mechanism 4 also includes an adjusting screw, which is limitedly matched with the circuit breaker housing, and one end of the adjusting screw is threadedly matched with one end of the first conductive plate 2b connected to the bimetallic strip 42 to adjust the position of the bimetallic strip 42 to adjust the tripping threshold or parameter of the bimetallic strip 42.

[0090] Specifically, Figure 2-9 As shown, the middle part of the lock 36 is rotatably set at the upper end of the yoke 40, the upper end of the lock 36 is connected to the circuit breaker housing through the lock reset spring 37, and the lower end is arranged opposite to the yoke 40. The upper end of the bimetallic strip 42 is electrically connected to the first output terminal 11 through the first conductive plate 2b, and the lower 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.

[0091] Preferably, the first conductive plate 2b is electrically connected to the contact support rod 31 through a second flexible connection, thereby adding a circuit from the second conductive plate 2b to the contact support rod, thereby reducing the current flowing through the bimetallic strip when a short circuit occurs in a plug-in circuit breaker with a large ampere rated current specification, thereby avoiding the bimetallic strip from failing due to heating caused by excessive current.

[0092] Preferably, Figure 3-9 As shown, the cross section of the yoke 40 is a U-shaped structure, and one end of the yoke 40 is provided with two yoke support arms 400 arranged opposite to each other (see Figure 6 ), a yoke limiting groove 401 is provided on the yoke support arm 400; 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 (see Figure 5 ), the lock reset end 360, the lock body 362 and the lock actuated end 364 are connected in sequence, and a lock support arm 361 is provided on both sides of the connection between the lock reset end 360 and the lock body 362. The lock actuated end 364 is an L-shaped structure, one end is bent and connected to the lock body 362, and the other end is driven and cooperated with the bimetallic strip 42. The two lock support arms 361 are respectively arranged in the two yoke limit grooves 401, the lock body 362 is arranged opposite to the yoke 40, and the lock hole 363 is arranged on the lock body 362 to cooperate with the jump buckle 32.

[0093] Specifically, Figure 3-9 In the direction shown, the upper end of the yoke 40 is provided with two yoke support arms 400 arranged opposite to each other, and the yoke support arms 400 are provided with a yoke limiting groove 401; the upper end of the lock body 362 is connected to the lock reset end 360 by bending, and the lower end is connected to the lock actuated end 364 by bending, the lock reset end 360 is bent to the right, and the lock actuated end 364 is bent to the left, and a lock hole 363 is provided in the middle of the lock body 362, which cooperates with the yoke 40.

[0094] like Figure 3-4 FIG. 1 shows an embodiment of an arc extinguishing system 5 of a plug-in circuit breaker of the present invention.

[0095] The arc extinguishing system 5 includes an arc extinguishing chamber 50 and a moving 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 moving contact arc striking plate 51 cooperates with the moving contact 61 and is electrically connected to the first output terminal 11, and the stationary contact arc striking plate 52 is provided with a stationary contact 62 at one end, and the other end is electrically connected to the first input terminal 110.

[0096] Specifically, Figure 3-4As shown, the moving contact arc-starting plate 51 and the static contact arc-starting plate 52 are respectively arranged on the left and right sides of the arc extinguishing chamber 50, the upper end of the moving contact arc-starting plate 51 cooperates with the moving contact 61, and the moving contact arc-starting plate 51 is electrically connected to the first output terminal 11, the upper end of the static contact arc-starting plate 52 is provided with a static contact 62, and the lower end is electrically connected to the first input terminal 110, and the upper end of the moving contact arc-starting plate 51 and the upper end of the static contact arc-starting plate 52 are bent toward each other.

[0097] like Figure 1-4 As shown, the plug-in circuit breaker of the present invention further includes at least two auxiliary signal terminals pluggably connected to the external circuit, each auxiliary signal terminal is electrically connected to the first output terminal 11, and a signal processing element is connected in series between at least one auxiliary signal terminal and the first output 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 output terminal 11; or, a signal processing element is connected in series between one of the auxiliary signal terminals and the first output terminal 11, and no signal processing element is provided between the other auxiliary signal terminal and the first output 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 the other auxiliary signal terminal outputs an AC signal, so that the plug-in circuit breaker is more adaptable and can meet the needs of different application environments.

[0098] It should be pointed out that the signal processing element is not limited to a diode, but may also be other components that can convert an AC signal into a DC signal; of course, the signal processing element may also be easily expanded with additional functions according to user needs.

[0099] Specifically, Figure 1-4 As shown, the plug-in circuit breaker of the present invention includes two auxiliary signal terminals connected to the 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 outlet terminal 11 through the moving contact arc-starting plate 51. A diode is connected in series between the second auxiliary signal terminal 13 and the moving contact arc-starting plate 51. Further, as Figure 1-4 In the direction shown, 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, and 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.

[0100] Preferably, 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 spring connecting plate and two second spring clamping plates arranged opposite to each other, the two second spring clamping plates are respectively connected to the two ends of the second spring connecting plate by bending, each second spring clamping plate is a "〈" structure, and the two second spring clamping plates form an X-shaped structure as a whole.

[0101] Preferably, Figure 3 As shown, the plug-in circuit breaker of the present invention further includes an exhaust port 16, and a first exhaust channel is further provided in the protective 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 As shown, the exhaust port 16 is disposed on the lower end surface of the circuit breaker housing, between the second auxiliary signal terminal 13 and the first incoming terminal 110 .

[0102] Preferably, Figure 10-13 As shown, the plug-in circuit breaker of the present invention has an operation button 1d with one end inserted in the circuit breaker housing, which is the button inner end, and the other end of the operation button 1d protrudes outside the circuit breaker housing, which is the button outer end; the operation button 1d includes an indicator slot arranged in the middle thereof and an indicator hole 12d arranged on the button outer end, and the indicator hole 12d is connected to one end of the indicator slot; the plug-in circuit breaker also includes an indicator 7 slidably inserted in the indicator slot, and one end of the indicator 7 is provided with a closing indicator surface 70 and a breaking indicator surface 70 respectively matched with the indicator hole 12d. When the plug-in circuit breaker is in the opening state, the opening indication surface 71 is arranged opposite to the indication hole 12d, the operating mechanism 1d is pressed to move it in the closing direction, and the indicator 7 moves as a whole in the indicator slot. After the plug-in circuit breaker enters the closing state, the closing indication surface 70 is arranged opposite to the indication hole 12d, the operating button 1d is pulled out to move it in the opening direction, and the indicator 7 moves as a whole in the indicator slot. After the plug-in circuit breaker enters the opening state, the opening indication surface 71 is arranged opposite to the indication hole 12d.

[0103] Preferably, the moving direction of the operation button 1d is perpendicular to the moving direction of the indicator 7 in the indicator slot.

[0104] Preferably, Figure 10-11 As shown, the operation button 1d further includes an indicator slide groove 100d respectively disposed on a pair of side walls of the indicator slot, and the extension direction of the indicator slide groove 100d is perpendicular to the moving direction of the operation button 1d; Fig.12 As shown, the indicator 7 further includes two indicator slides 72 respectively arranged on a pair of side surfaces thereof. The indicator slides 72 are slidably arranged in the indicator slide groove 100d to limit the moving path of the indicator 7 in the indicator slot 100d.

[0105] Preferably, Fig.11 and 13 As shown, the indicator 7 also includes an indicator track shaft 75 disposed at the other end thereof; Fig.10 As shown, the circuit breaker housing is provided with an indicator track groove, and the indicator track shaft 75 is slidably set in the indicator track groove. When the operation button 1d is pressed / pulled, the indicator track groove drives the indicator 7 to move as a whole in the indicator slot through the indicator track shaft 75, so that the closing indication surface 70 / the opening indication surface 71 is arranged relative to the indication hole 12d. The indicator track groove is an inclined track groove, which can be arranged in a straight line or in an arc. As another embodiment of driving the indicator 7 to move, an inclined driving surface can also be set on the indicator 7, and a driving protrusion can be set on the circuit breaker housing. Through the cooperation of the inclined driving surface and the driving protrusion, the indicator 7 moves horizontally relative to the operation button 1d when the operation button 1d is pressed / pulled.

[0106] Further, such as Fig.10 As shown, the indicator track groove is an inclined track groove, which is formed by the relative cooperation of two inclined half grooves on the circuit breaker housing arranged oppositely; when the plug-in circuit breaker is in the open state, the indicator track shaft 75 is located at one end of the indicator track groove, which is the first end of the track groove; when the plug-in circuit breaker is in the closed state, the indicator track shaft 75 is located at the other end of the indicator 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.

[0107] It should be pointed out that the closing indication surface 70 and the opening indication surface 71 can be in different colors, for example, the closing indication surface is green and the opening indication surface is red; or, the closing indication surface 70 and the opening indication surface 71 have different text or symbol logos, for example, the closing indication surface 70 has the word "closed" or the symbol "|", and the opening indication surface 71 has the word "open" or the symbol "○"; of course, the implementation forms of the two are not limited to the above two, as long as the closing indication surface 70 and the opening indication surface 71 can be effectively distinguished, so as to correctly indicate the closing and opening states of the plug-in circuit breaker.

[0108] Specifically, Fig.10 and 11 As shown, the upper end of the operating button 1d is the outer end of the button, and the lower end is the inner end of the button. The end surface of the outer end of the button is provided with an indication hole 12d, and the indication hole 12d is connected to the upper end of the indicator slot; the closing indication surface 70 and the opening indication surface 71 are arranged side by side at the upper end of the indicator 7, two indicator slides 72 are arranged on both sides of the middle of the indicator 7, and the indicator track shaft 75 is arranged at the lower end of the indicator 7. Fig.10As shown, the indicator track groove is formed by two inclined half grooves that cooperate with each other. One inclined half groove is set on the rear cover 1a, which is the first half groove 10a, and the other inclined half groove is set on the base 1b, which is the second half groove 10b; the upper right end of the indicator 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 opened, the indicator track shaft 75 is located at the first end of the track groove, and when the plug-in circuit breaker is closed, the indicator track shaft 75 is located at the second end of the track groove; as shown Fig.10 As shown, when the plug-in circuit breaker is in the open state, when the operating button 1d is pressed down (that is, the operating button 1d moves in the closing direction), since the operating button 1d moves in a straight line and the indicator track groove is tilted from the upper right to the lower left, the indicator track groove will drive the indicator 7 to move horizontally (that is, the overall movement of the indicator 7 in the indicator slot) through the indicator track shaft 75, thereby switching from the opening indication surface 71 being arranged relative to the indication hole 12d to the closing indication surface 70 being arranged relative to the indication hole 12d; when the plug-in circuit breaker is in the closed state, when the operating button 1d is pulled upward, the indicator 7 undergoes the above-mentioned reverse process.

[0109] Preferably, Figure 10-18 As shown, the plug-in circuit breaker of the present invention also includes a locking mechanism, which includes a second locking member 8 pivotally arranged in the middle, and the second locking member 8 includes a locking member upper end and a locking member lower end respectively arranged at both ends thereof, and the locking member lower end is provided with a second protrusion 82; when the plug-in circuit breaker is in a closed state, the operating 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 an open state, the operating 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 Fig.11 , 12 As shown in , 18, the indicator 7 also includes an indicator horizontal arm 74 disposed at one end thereof; the second locking member 8 also includes a second locking member actuated portion 81 disposed at the upper end of the locking member, and the operating button 1d drives and cooperates with the second locking member actuated portion 81 through the indicator 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 Fig.11 , 12 As shown in Figures 17, the second locking member 8 also includes a second locking member actuated protrusion 83 arranged at the lower end of the locking member, and the second locking member actuated protrusion 83 and the second protrusion 82 protrude in the opposite direction; when the plug-in circuit breaker is in the closed state, the indicator horizontal arm 74 is located on one side of the second locking member actuated protrusion 83 and cooperates with its limiting position, so that the second protrusion 82 remains protruding outside the circuit breaker housing.

[0110] Specifically, Fig.18In the direction shown, the indicator horizontal arm 74 is arranged at the lower end of the indicator 7 and connected to it at a right angle and protrudes to the left, the second locking member actuated portion 81 is arranged at the upper end of the second locking member 8 and connected to it at a right angle and protrudes to the right, and the second protrusion 82 ( Fig.18 The second protrusion 82 is blocked by the first locking member 9) and the second locking member actuated protrusion 83 are both arranged at the lower end of the second locking member 8, protruding to the left and right sides of the second locking member 8 respectively, and the indicator horizontal arm 74 is located at the lower side of the second locking member actuated portion 81 to drive and cooperate with it. Fig.18 As shown, when the plug-in circuit breaker is in the off state, the operating button 1d drives the second locking member 8 to rotate counterclockwise through the cooperation of the indicator horizontal arm 74 and the second locking member actuated portion 81, so that the second protrusion 82 moves into the circuit breaker housing; Fig.17 In the direction shown, when the plug-in circuit breaker is in the closed state, the operating button 1d moves downward, and the second locking member actuated protrusion 83 is pressed by the indicator horizontal arm 74, so that the second locking member 8 rotates counterclockwise, and the second protrusion 82 protrudes outside the circuit breaker housing. Since the indicator horizontal arm 74 is located on the left side of the second locking member actuated protrusion 83 and cooperates with its limit position, the second protrusion 82 is kept protruding outside the circuit breaker housing.

[0111] In the plug-in circuit breaker of the present invention, when in the closed state, the indicator horizontal arm 74 of the indicator 7 keeps the second protrusion 82 of the second locking member 8 protruding outside the circuit breaker housing, thereby preventing the circuit breaker from being installed in the closed state and causing electric shock, which is beneficial to improving the user's electricity safety.

[0112] It should be pointed out that the driving of the second locking member 8 is not limited to being driven by the indicator horizontal arm 74 , and a structure similar to the indicator horizontal arm 74 may also be provided at the lower end of the operation button 1d to drive the second locking member 8 .

[0113] Preferably, Figure 10-11 As shown in , 14-15, and 16-18, the locking mechanism also includes a first locking piece 9, one end of which is slidably arranged in the circuit breaker housing, and the other end is a first protrusion 90 protruding from the outside of the circuit breaker housing; when the plug-in circuit breaker is assembled to the cavity-type circuit breaker assembly position, the housing of the circuit breaker assembly position squeezes the first protrusion 90, so that the first locking piece 9 moves as a whole toward the inside of the circuit breaker housing, and 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 assembly position.

[0114] The first locking member 9 of the plug-in circuit breaker of the present invention cooperates with the housing limit of the circuit breaker assembly position after the plug-in circuit breaker is assembled to the cavity-type circuit breaker assembly position and is assembled in place, thereby 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, thereby improving the safety of electricity use.

[0115] Preferably, Figure 16-18 As shown, the lower end of the second locking member 8 is driven to cooperate with the first locking member 9; when the plug-in circuit breaker is in the off state, the operating button 1d is pulled out, and the operating button 1d drives the first locking member 9 to move as a whole into the circuit breaker housing through the second locking member 8, so that the first protrusion 90 releases the limit cooperation with the housing of the circuit breaker assembly position. Figure 14-18 As shown, the first sliding end 90a also includes a first actuated protrusion 91 and a second actuated protrusion 94; the second locking member 8 also includes a second locking member body 84 pivotally arranged in the middle, the second locking member actuated portion 81 of the second locking member 8 is connected to one end of the second locking member body 84 by a bend, and the other end of the second locking member body 84 is provided with a second protrusion 82 and the end is driven to cooperate with the second actuated protrusion 94, the second locking member actuated portion 81 and the second protrusion 82 protrude to both sides of the second locking member body 84 respectively, and the second protrusion 82 is driven to cooperate with the first actuated protrusion 91.

[0116] It should be pointed out that the first locking member 9 can omit the first actuated protrusion 91 or the second actuated protrusion 94 and retain either one of them to cooperate with the second locking member 8. Of course, this improvement will reduce the stability and reliability of the action of the first locking member 9.

[0117] Preferably, Fig.11 and 15 As shown, the first locking member 9 also includes a first sliding end 90a slidably disposed 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 reset spring 9a. The first locking member reset spring 9a provides a force to the first locking member 9 so that the first protrusion 90 remains protruding outside the circuit breaker housing.

[0118] Specifically, Fig.16 and 17 In the direction shown, the upper end of the second locking member driving portion 84 is connected to the second locking member actuated portion 81 by bending (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 body 84, and the lower end of the second locking member driving portion 84 and the second protrusion 82 are respectively arranged on the right side of the second actuated protrusion 94 and the first actuated protrusion 91; Fig.16As shown, the plug-in circuit breaker is in the off state, and the operating button 1d is pulled upward. The operating button 1d drives the second locking member 8 to rotate clockwise through the cooperation of the indicator horizontal arm 74 of the indicator 7 and the second locking member actuated portion 81. Then, the lower end of the second locking member driving portion 84 drives the first locking member 9 to move leftward (into the circuit breaker housing) through the second actuated protrusion 94 and the second protrusion 82 through the first actuated protrusion 91, so that the first protrusion 90 of the first locking member 9 releases the limit cooperation with the housing of the circuit breaker assembly position.

[0119] Preferably, Fig.10 As shown, the circuit breaker housing is provided with a first opening 11a which cooperates with the first protrusion 90 and the second protrusion 82. Figure 1 As shown, the first opening 11 a is disposed on the right side surface of the circuit breaker housing, and the first protrusion 90 and the second protrusion 82 protrude outside the circuit breaker housing through the first opening 11 a respectively.

[0120] like Figure 11-18 FIG. 1 is an embodiment of the locking mechanism of the plug-in circuit breaker of the present invention.

[0121] like Fig.10 and 11 As shown, the locking mechanism includes a first locking member 9, a second locking member 8 and an indicator member 7; one end of the indicator member 7 is inserted into the operating button 1d, and the other end is driven to cooperate with the second locking member 8. The second locking member 8 is pivotally arranged in the middle part, and one end is driven to cooperate with the first locking member 9.

[0122] Preferably, Fig.10 , 11 As shown in FIGS. 14 and 15, the first locking member 9 comprises 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 reset spring 9a. Fig.15 As shown, the first sliding end 90a includes a locking spring limiting groove 92 disposed on one side thereof, and a locking spring limiting protrusion is also disposed in the middle of the locking spring limiting groove 92. One end of the first locking return spring 9a is inserted into the locking spring limiting groove 92 and sleeved on the locking spring limiting protrusion. Fig.15 As 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. Fig.14As shown, the first sliding end 90a also includes a first actuated protrusion 91 and a second actuated protrusion 94. The first actuated protrusion 91 and the first track groove 93 are respectively arranged at the two ends of the first sliding end 90a, and the second actuated protrusion 94 is arranged on the upper side of the first sliding end 90a and is located between the first locking protrusion 91 and the first track groove 93.

[0123] Preferably, Fig.10 , 11 As shown in , 16-18, the second locking member 8 includes a second locking member actuated portion 81, a second locking member main body 84, a second locking member actuated protrusion 83 and a second protrusion 82; the middle portion of the second locking member main body 84 is pivotally arranged on the circuit breaker housing through the second locking member mounting shaft 80, one end of which is bent and connected to the second locking member actuated portion 81, and the other end is provided with the second locking member actuated protrusion 83 and the second protrusion 82; the second locking member actuated portion 81 and the second protrusion 82 respectively protrude to both sides of the second locking member main body 84, and the second locking member actuated portion 81 and the second locking member actuated protrusion 83 protrude on the same side of the second locking member main body 84.

[0124] Specifically, Fig.10 and 11 As shown, the second locking member 8 includes a locking member upper end and a locking member lower end which are respectively arranged at the upper and lower ends thereof, the second locking member actuated portion 81 is connected to the second locking member body 84 by bending (connected at a right angle or approximately at a right angle), constituting the locking member upper end, the second protrusion 82 and the second locking member actuated protrusion 83 are both arranged at the lower end of the second locking member body 84, and the second protrusion 82 and the lower end of the second locking member body 84 constitute the locking member lower end; a second locking member mounting shaft 80 is arranged in the middle of the second locking member body 84, and the two ends of the second locking member mounting shaft 80 are respectively pivotally connected to the circuit breaker housing; the lower end of the second locking member body 84 is driven and matched with the second actuated protrusion 94, and the second locking member actuated protrusion 83 is arranged at one side edge of the lower end of the second locking member body 84 (as shown in FIG. Fig.10 The second locking member actuated protrusion 83 is arranged at the left edge of the lower end of the second locking member body 84, and the second protrusion 82 protrudes below the lower end of the second locking member body 84 and is connected to the second locking member actuated protrusion 83 (as shown in FIG. Fig.10In the direction shown, the second locking member actuated portion 81 and the second locking member main body 84 form an L-shaped structure as a whole, the second locking member actuated protrusion 83 and the second protrusion 82 are an integrated plate structure, which is located on the left side of the above-mentioned L-shaped structure as a whole, the upper end is the second locking member actuated protrusion 83, which is connected to the lower end of the second locking member main body 84, and the lower end is the second protrusion 82, which protrudes below the lower end of the second locking member main body 84), the second locking member actuated portion 81 and the second protrusion 82 protrude to both sides of the second locking member main body 84 respectively, the second locking member actuated portion 81 and the second locking member actuated protrusion 83 protrude to the same side of the second locking member main body 84, and the second protrusion 82 is driven to cooperate with the first actuated protrusion 91.

[0125] Preferably, Figure 10-13 As shown in , 17-18, the indicator 7 includes an indicator body 7-0, an indicator horizontal arm 74, an indicator track shaft 75, an indicator slide 72, a closing indicator surface 70 and an opening indicator surface 71; the indicator horizontal arm 71 is arranged at one end of the indicator body 7-0 and is connected to the indicator body 7-0 by bending, the closing indicator surface 70 and the opening indicator surface 71 are arranged side by side at the other end of the indicator body 7-0, and two indicator slides 72 are respectively arranged in the middle of both sides of the indicator body 7-0. Further, as Fig.12 As shown, the indicator 7 also includes an indicator vertical arm 73. The indicator vertical arm 73 and the indicator horizontal arm 74 are arranged at the same end of the indicator body 70. The two form an L-shaped structure as a whole. The indicator vertical arm 73 is conducive to improving the structural strength of the indicator horizontal arm 74.

[0126] Specifically, Fig.12 and 13 In the direction shown, the closing indication surface 70 and the opening indication surface 71 are arranged side by side on the upper end surface of the indicator body 7-0, the indicator track shaft 75, the indicator horizontal arm 71, and the indicator vertical wall 73 are all arranged at the lower end of the indicator body 7-0, the indicator horizontal arm 71 and the indicator vertical wall 73 are arranged on the same side of the indicator body 7-0, and the whole forms an L-shaped structure, the indicator track shaft 75 is arranged on the other side of the indicator body 7-0, and the two indicator slides 72 are arranged on both sides of the middle part of the indicator body 7-0, and are both located between the opening indication surface 71 and the indicator horizontal arm 71.

[0127] like Fig.10 As shown, the circuit breaker housing is provided with an indicator track groove that cooperates with the indicator track shaft 75, and the indicator track groove is inclined. The indicator track groove is an inclined track groove, and its upper right end is inclined toward the lower left end. Fig.10As shown, the indicator 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, the upper end of the second vertical groove is connected to the lower left end of the inclined groove, and the lower end of the first vertical groove is higher than the upper end of the second vertical groove. Fig.10 As shown, the indicator track groove is composed of two inclined half grooves that cooperate with each other. Specifically, one inclined half groove is arranged on the back cover 1a, and the other inclined half groove is arranged on the base 1b.

[0128] Preferably, Fig.10 As shown, the operation button 1d includes a button body 10d and a button cap disposed at one end of the button body 10d, an indication hole 12d is disposed in the middle of the button cap, an indication member slot is disposed in the middle of the other end of the button body 10d, and an indication member slot 100d is disposed on each of the two side walls of the indication member slot. Fig.10 As 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.

[0129] Combination Figure 16-18 As shown, the working principle of the locking mechanism will be described below:

[0130] like Fig.16 As shown, the plug-in circuit breaker is in the off state, and the operation button 1d cooperates with the indicator horizontal arm 74 of the indicator 7 and the second locking member actuated portion 81 of the second locking member 8 to drive the second locking member 8 to rotate clockwise, and the second protrusion 82 of the second locking member 8 moves into the circuit breaker housing. In this state (off state), the plug-in circuit breaker can be installed in the circuit breaker assembly position (such as a cabinet); Fig.18 As shown in the figure, when the plug-in circuit breaker is in the off state, the operating button 1d is continuously pulled out, and the operating button 1d drives the second locking member 8 to continue to rotate clockwise through the cooperation of the indicator horizontal arm 74 of the indicator 7 and the second locking member actuated portion 81 of the second locking member 8, and the lower end of the second locking member body 84 of the second locking member 8 and the second protrusion 82 drive the second actuated protrusion 94 and the first actuated protrusion 91 respectively, so that the first protrusion 90 of the first locking member 9 moves into the circuit breaker housing, thereby releasing the limit cooperation between the plug-in circuit breaker and the housing of the circuit breaker assembly position, so that the plug-in circuit breaker can be removed from the circuit breaker assembly position; as shown in the figure, Fig.17As shown, when the plug-in circuit breaker is in the closed state, the operation button 1d drives the indicator horizontal arm 74 to move downward, and the indicator horizontal arm 74 drives the second locking member 8 to rotate counterclockwise through the second locking member actuated protrusion 83, so that the second protrusion 82 protrudes outside the circuit breaker housing. In this state (closed state), the second protrusion 82 protrudes outside the circuit breaker housing. Due to the limitation of the indicator horizontal arm 74 on the second locking member actuated protrusion 83, the second protrusion 82 cannot be squeezed 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 is switched between the open state and the closed state, due to the indicator With the cooperation of the track shaft 75 and the indicator track groove, the indicator 7 will also reciprocate in the indicator slot of the operating button 1d, so that when the plug-in circuit breaker is closed, the closing indication surface 70 is opposite to the indication hole 12d (preferably, the indicator track shaft 75 is located at the connection between the second vertical groove and the inclined groove at this time), and when the plug-in circuit breaker is opened, the opening indication surface 71 is opposite to the indication hole 12d (preferably, the indicator track shaft 75 is located at the connection between the first vertical groove and the inclined groove at this time, and the operating button 1d is continued to be pulled, so that the indicator 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 cooperation with the shell of the circuit breaker assembly position).

[0131] The invention also discloses a wiring terminal.

[0132] like Figure 19-24 FIG. 1 shows an implementation of the wiring terminal of the present invention.

[0133] The terminal of the present invention comprises a terminal screw 2e, a wire pressing plate 2g, a nut 2f and a terminal board 2j; the terminal screw 2e is threadedly connected with the nut 2f; the wire pressing plate 2g is arranged between the nut 2f and the nut of the terminal screw, and is arranged obliquely relative to the terminal board 2j, the terminal board 2j is fixedly arranged, one end of the wire pressing plate 2g is limited, and the other end is arranged relative to the terminal board 2j to form a space for connecting the wire; the wire is inserted between the wire pressing plate 2g and the terminal board 2j, and the terminal screw 2e is screwed, and the nut 2f moves axially along the terminal screw 2e, and at the same time, the nut 2f drives the end of the wire pressing plate 2g that cooperates with the terminal board 2j to lift up, and the wire is pressed tightly between the wire pressing plate 2g and the terminal board 2j. Further, the nut 2f is limitedly matched with the terminal assembly cavity accommodating the terminal, preventing the nut 2f from rotating, and can only move along the axial direction of the terminal screw 2e, and the nut 2f moves back and forth along the axial direction of the terminal screw 2e when the terminal screw 2e is screwed.

[0134] Specifically, Figure 19-24In the direction shown, the left end of the wire pressing plate 2g is limited, and the right end is arranged opposite to the terminal block 2j and used in conjunction with it. The wire pressing plate 2g gradually tilts downward from the left end to the right end, and the left end of the wire pressing plate 2g is higher than the right end of the wire pressing plate 2g. When the wiring screw 2e is screwed, the nut 2f moves upward along the axial direction of the wiring screw 2e, and 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 the wire needs to be removed, the wiring screw 2e needs to be screwed to make the nut 2f move downward along the axial direction of the wiring screw 2e, reducing the pressure between the wire pressing plate 2g and the wire, so as to better remove the wire.

[0135] Preferably, Figure 19-24 As shown, the terminal board 2j is provided with a plurality of transverse grooves or transverse ribs arranged side by side on the side facing the wire pressing board 2g, and the extending direction of the transverse grooves or transverse ribs is perpendicular to the direction of wire insertion.

[0136] The terminal block of the present invention has a pressure applied by the wire pressing plate 2g to the wire located between the wire pressing plate 2g and the terminal block 2j, which 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 terminal block that only relies on the wire pressing plate 2g to tighten the wire, the wiring is more reliable.

[0137] It should be pointed out that, in the wiring terminal of the present embodiment, the nut member 2f may not be limitedly matched with the terminal assembly cavity that accommodates the wiring terminal, but only relies on the friction force 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 wiring 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, which does not coincide with the axis of the wiring screw 2e, so an eccentric force is generated to limit the nut member 2f from rotating with the wiring screw 2e. In addition, in the wiring terminal of the present embodiment, the nut member 2f and the wiring screw 2e may also be fixedly connected (instead of threaded connection), and the wiring screw 2e is threadedly matched with the shell of the terminal assembly cavity. When the wiring screw 2e is screwed, the wiring screw 2e moves relative to the terminal assembly cavity, and at the same time drives the nut member 2e to move, which can also drive the wire pressing plate 2g to move.

[0138] like Figure 19-21 FIG. 1 shows a first embodiment of the wiring terminal of the present invention.

[0139] The terminal comprises a terminal screw 2e, a wire pressing plate 2g, a nut 2f, a terminal plate 2j, a wire pressing plate mounting shaft 2h and a wire pressing plate reset spring 2i; the terminal screw 2e is threadedly connected with the nut 2f, the nut 2f is limitedly matched with the terminal assembly cavity accommodating the terminal, and the nut 2f is prevented from rotating, and the terminal screw 2e is screwed, and the nut 2f reciprocates along the axial direction of the terminal screw 2e; the wire pressing plate 2g is arranged between the nut 2f and the nut of the terminal screw, and is inclined relative to the terminal plate 2j, and the terminal plate 2j is fixed; one end of the wire pressing plate 2g is provided with a wire pressing plate shaft sleeve 20g, and the other end is arranged opposite to the terminal plate 2j and used in conjunction, the wire pressing plate shaft sleeve 20g is sleeved on the wire pressing plate mounting shaft 2h, and the two ends of the wire pressing plate mounting shaft 2h are respectively fixed on the cavity wall of the terminal assembly cavity, and the wire pressing plate reset torsion spring 2i is sleeved on the wire pressing plate mounting shaft 2h, one end is connected to the cavity wall of the terminal assembly cavity, and the other end is connected to the wire pressing plate 2g. In the wiring terminal of this embodiment, the wire pressing plate return spring 2i can drive the raised end of the wire pressing plate 2g to fall down while the nut member 2f moves downward, thereby improving the efficiency and convenience of wire removal.

[0140] Specifically, Figure 19-21 In the direction shown, the left end of the wire pressing plate 2g is provided with a wire pressing plate sleeve 20g, and the right end is arranged opposite to and used in conjunction with the terminal block 2j. The wire pressing plate 2g gradually tilts downward from the left end to the right end, and the left end of the wire pressing plate 2g is higher than the right end of the wire pressing plate 2g. Fig. 20 As shown, at this time, the gap between the right end of the wire pressing plate 2g and the terminal board 2j is the largest, and the wire can be inserted between the wire pressing plate 2g and the terminal board 2j at this time, and then the terminal screw 2e is screwed to make the nut member 2f move upward along the axial direction of the terminal screw 2e, while driving the right end of the wire pressing plate 2g to gradually rise, and at the same time, the gap between the right end of the wire pressing plate 2g and the terminal board 2j gradually becomes smaller, thereby pressing the wire tightly; as shown in FIG. Fig.21 As shown, at this time, the gap between the right end of the wire pressing plate 2g and the terminal board 2j is the smallest, almost 0.

[0141] Preferably, Fig.21 As shown, the wire pressing plate 2g includes a wire pressing plate sleeve 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 wire pressing plate sleeve 20g, and the other end is bent and connected to one end of the first wire pressing portion 22g, and the other end of the first wire pressing portion 22g is matched with the terminal block 2j. Specifically, as Fig.21 In the direction shown, the left end of the first connecting portion 21g is connected to the wire pressing plate sleeve 20g, and the right end is connected to the left end of the first wire pressing portion 22g by bending, and the right end of the first wire pressing portion 22g is arranged opposite to the terminal board 2j and used in conjunction with it. Figure 19-21As shown, the wire pressing plate 2g is an L-shaped structure as a whole, the width of the first wire pressing portion 22g is greater than the width of the first connecting portion 21g, and the length of the wire pressing plate sleeve 20g is the same as the width of the first connecting portion 21g; the wiring screw 2e is arranged in the notch of the L-shaped structure of the wire pressing plate 2g.

[0142] Preferably, Fig. 20 As shown, the nut member 2f includes a first nut member 20f threadedly connected to the connection screw 2e and a second nut member 21f bent and connected to one end of the first nut member 20f. The first nut member 20f is disposed opposite to and used in conjunction with the first connecting portion 21g, and the second nut member 21f is disposed opposite to and used in conjunction with the first wire pressing portion 22g. Specifically, as Figure 19-20 As shown, in the initial state, the second portion 21f of the nut member is in contact with and connected to the first pressing portion 22g (the two are substantially parallel), and the right end of the first portion 20f of the nut member is in contact with and connected to the right end of the first connecting portion 21g; Fig.21 As shown, after the wiring screw 2e is screwed, the second portion 21f of the nut member first drives the first wire pressing portion 22g to be gradually lifted, and at the same time, the second portion 21f of the nut member gradually separates from the first wire pressing portion 22g, and then the first portion 20f of the nut member and the first connecting portion 21g cooperate to drive the first wire pressing portion 22g to continue to be lifted.

[0143] Preferably, Fig. 20 As shown, the included angle α between the first connecting portion 21g and the first pressing portion 22g is greater than the included angle β between the first portion 20f of the nut member and the second portion 21f of the nut member.

[0144] like Figure 22-24 FIG. 2 shows a second embodiment of the wiring terminal of the present invention.

[0145] The wiring terminal of the present invention comprises 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 with the nut member 2f, the nut member 2f is limitedly matched with a terminal assembly cavity accommodating the wiring terminal to prevent the nut member 2f from rotating, and the wiring screw 2e is screwed, and the nut member 2f reciprocates along the axial direction of 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, and 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 the wiring board 2j and used in combination; a wire is inserted between the wire pressing plate 2g and the wiring board 2j, and the wiring screw 2e is screwed, and 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 that cooperates with the wiring board 2j to lift up, and the wire is pressed tightly between the wire pressing plate 2g and the wiring board 2j.

[0146] Preferably, Figure 22-24As shown, the wire pressing plate 2g includes a first wire pressing plate portion 200g, a second wire pressing plate portion 210g and a third wire pressing plate portion 220g. The first wire pressing plate portion 200g is sleeved on the wiring screw 2e through a first opening arranged thereon, the second wire pressing plate portion 210g is provided with a second waist-shaped hole, the second wire pressing plate hole 210g is sleeved on the wiring screw 2e through the second waist-shaped hole, the first wire pressing plate portion 200g, one end is bent and connected to one end of the second wire pressing plate portion 210g, and the other end of the second wire pressing plate portion 210g is connected to the third wire pressing plate portion 220g The other end of the third part 220g of the wire pressing plate is used in conjunction with the terminal board 2j, and the second part 210g of the wire pressing plate and the third part 220g of the wire pressing plate are arranged obliquely relative to the terminal board 2j as a whole; the nut member 2f includes a first part 20f of the nut member threadedly connected to the terminal screw 2e and a second part 21f of the nut member bent and connected to the first part 20f of the nut member, the first part 20f of the nut member and the second part 210g of the wire pressing plate are arranged opposite to each other and used in conjunction with each other, and the second part 21f of the nut member and the third part 220g of the wire pressing plate are arranged opposite to each other and used in conjunction with each other. Further, as Fig.23 As shown, the connection between the first part 200g and the second part 210g of the wire pressing plate is an arc structure, and the angle α1 between the second part 210g and the third part 220g of the wire pressing plate is greater than the angle β between the first part 20f and the second part 21f of the nut member.

[0147] Specifically, Figure 22-24 As shown, the first part 200g of the pressing plate and the second part 210g of the pressing plate are sequentially arranged between the nut and the nut member 2f of the wiring screw 2e, the left end of the third part 220g of the pressing plate is bent and connected to the right end of the second part 210g of the pressing plate, and the right end of the third part 220 of the pressing plate is arranged opposite to the wiring board 2j and used in conjunction with it; Fig. 22 and 23 As shown, at this time, there is no interaction force or a weak interaction force between the nut of the wiring screw 2e and the first part 200g of the wire pressing plate, and between the third part 220g of the wire pressing plate and the second part 21f of the nut member; Fig.24 As shown, at this time, there is a large force between the nut of the wiring screw 2e and the first part 200g of the wire pressing plate, and between the second part 210g of the wire pressing plate and the first part 20f of the nut member (because the connection between the first part 200g of the wire pressing plate and the second part 210g of the wire pressing plate is compressed). When the wiring screw 2e is screwed to move the nut member 2f downward, the connection between the first part 200g of the wire pressing plate and the second part 210g of the wire pressing plate in a compressed state gradually relaxes, causing the third part 220g of the wire pressing plate to gradually move downward, making it more convenient to remove the wiring of the terminal.

[0148] like Figure 25-30 FIG. 2 shows another embodiment of the connecting terminal of the present invention.

[0149] The wiring terminal of the present invention comprises a wiring screw 2e, a wire pressing plate 2g, a wire pressing plate mounting shaft 2h, a nut member 2f and a wiring board 2j; the wiring screw 2e is threadedly connected with the nut member 2f; the wire pressing plate 2g comprises an upper wire pressing plate 2g1 and a lower wire pressing plate 2g2 which are arranged opposite to each other, the upper wire pressing plate 2g1 and the lower wire pressing plate 2g2 are both arranged obliquely relative to the wiring board 2j, a connection point where one end of the upper wire pressing plate 2g1 is connected to one end of the lower wire pressing plate 2g2 is sleeved on the wire pressing plate mounting shaft 2h, and the free end of the lower wire pressing plate 2g2 and the free end of the upper wire pressing plate 2g1 are both arranged opposite to the wiring board 2j and used in conjunction with each other; a wire is inserted between the wire pressing plate 2g and the wiring board 2j, the wiring screw 2e is screwed, the nut member 2f moves along the axial direction of the wiring screw 2e, and at the same time the nut member 2 drives the end of the wire pressing plate 2g that cooperates with the wiring board 2j to be lifted, and the wire is pressed tightly between the wire pressing plate 2g and the wiring board 2j. Furthermore, the wire pressing plate 2g is limitedly matched with the wiring screw 2e to prevent the wire pressing plate 2g from moving away from the wiring plate 2j. Furthermore, the nut member 2f is limitedly prevented from rotating, and the wiring screw 2e is screwed, and the nut member 2f reciprocates along the axis direction of the wiring screw 2e.

[0150] Preferably, Fig.26 , 27 As shown in Figures 29, the upper wire pressing plate 2g1 and the lower wire pressing plate 2g2 are both L-shaped structures. The upper wire pressing plate 2g1 includes an upper connecting portion 2g11 and an upper wire pressing portion 2g10. The upper wire pressing portion 2g10 includes a first wire pressing end and a first connecting end respectively arranged at both ends thereof. The first wire pressing end is arranged opposite to the terminal block 2j and used in conjunction with it. The first connecting end is connected to one end of the upper connecting portion 2g11, and the width of the first connecting end is greater than the width of the upper connecting portion 2g11; the lower wire pressing plate 2g2 includes a lower connecting portion 2g21 and a lower wire pressing portion 2g20, the lower wire-pressing part 2g20 includes a second wire-pressing end and a second connecting end respectively arranged at both ends thereof, the second wire-pressing end is arranged opposite to the terminal block 2j and used in conjunction with it, the second connecting end is connected to one end of the lower connecting part 2g21, the width of the second connecting end is greater than the width of the lower connecting part 2g21, and the other end of the lower connecting part 2g21 is connected to the other end of the upper connecting part 2g11; the first wire-pressing end protrudes toward the direction of the terminal block 2j and the second connecting end protrudes beyond the first connecting end toward the direction of the terminal screw 2g.

[0151] Specifically, Fig. 27In the direction shown, the right end of the upper wire pressing part 2g10 and the right end of the lower wire pressing part 2g20 are respectively arranged opposite to the wiring board 2j and used in conjunction with each other, the right end of the lower wire pressing part 2g20 protrudes from the right end of the upper wire pressing plate 2g10 in the direction where the wiring board 2j is located (to the right side), and the left end of the upper wire pressing part 2g20 protrudes from the left end of the lower wire pressing plate 2g20 in the direction where the wiring screw 2e is located (to the left side); 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 The wiring screw 2e is screwed, and the nut member 2f moves upward, and at the same time, the right ends of the lower wire pressing part 2g20 and the upper wire pressing part 2g10 are driven to lift upward to press the wire tightly; if the outer diameter of the wire is thin, only the lower wire pressing part 2g20 is needed to press the wire tightly, and if the outer diameter of the wire is large, the lower wire pressing part 2g20 and the upper wire pressing part 2g10 cooperate to press the wire tightly, which is beneficial to improve the wiring reliability of the wiring terminal of the present invention, so that the wiring terminal of the present invention can be suitable for wiring operations of wires with various outer diameters.

[0152] Preferably, Fig. 27 As shown, the lower wire pressing plate 2g2 also includes a wire removing spring 2g22 disposed in the middle of the lower wire pressing portion 2g20, one end of the wire removing spring 2g22 is connected to the lower wire pressing portion 2g20, and the other end is disposed opposite to and used in conjunction with the upper wire pressing portion 2g10. Fig. 27 As shown, the angle γ between the wire removal spring 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 move the nut 2f downward, and the wire removal spring piece 2g22 can provide elastic force to release the wire from the lower wire pressing part 2g20, thereby improving the convenience and efficiency of wire removal.

[0153] Preferably, Fig.25 , 26 As shown in FIG. 28, the wiring terminal of the present invention further includes two relatively arranged fixing plates 2k, the connecting screw 2e, the nut member 2f, the wire pressing plate 2g and the wiring plate 2j are all arranged between the two fixing plates 2k, the two fixing plates 2k limit the nut member 2f to prevent the nut member 2f from rotating, and the two ends of the wire pressing plate mounting shaft 2h are respectively connected to the two fixing plates 2k. Further, as Fig.25 and 28 As shown, the fixing plate 2k is provided with a nut member slide 2k1, and a nut member slide 22f is provided at each end of the nut member 2f, and the two nut member slides 22f are respectively slidably arranged in the two nut member slides 2k1. Fig.26 As shown, the fixing plate 2k is further provided with a wiring board limiting hole 2k3, and a wiring board limiting platform 2j0 is respectively provided at a pair of edges of the wiring board 2j, and the two wiring board limiting platforms 2j0 are respectively arranged in the two wiring board limiting holes 2j0.

[0154] like Fig.25 and 26 As shown, the two ends of the wire pressing plate mounting shaft 25 are respectively connected to the upper part of one end of the two fixed plates 2k, specifically, the two ends of the wire pressing plate mounting shaft 25 are respectively connected to the upper left corners of the two fixed plates 2k; the wiring board 2j is arranged between the other ends of the two fixed plates 2k, specifically, the two ends of the wiring board 2j are respectively connected to the right ends of the two fixed 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 conjunction with it, and 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 conjunction with it. The plate mounting shaft 2h is connected from one end to the other end and is tilted downward. Specifically, the wire pressing plate 2g is gradually tilted downward from its left end to the right end; the wire pressing plate 2g is an L-shaped structure as a whole, and the wiring screw 2e is arranged at the notch of the L-shaped structure of the wire pressing plate 2g, and is threadedly matched with the nut piece 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).

[0155] Preferably, the terminal board 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 extension direction of the transverse grooves or transverse ribs is perpendicular to the direction of wire insertion.

[0156] It should be pointed out that the wiring terminal of the present invention can be used for the plug-in circuit breaker of the present invention. The first outlet terminal 11 and the second outlet terminal 10 of the plug-in circuit breaker can adopt the wiring terminal of the present invention, which improves the wiring efficiency and the wiring reliability. Furthermore, an auxiliary wire removal hole is also provided on the circuit breaker housing, and each outlet terminal corresponds to an auxiliary wire removal hole. The auxiliary wire removal hole is arranged on one side of the wiring screw 2e and is arranged opposite to the wire pressing plate 2g. Furthermore, the auxiliary wire removal hole is arranged opposite to one end of the wire pressing plate 2g that cooperates with the wiring plate 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 removal hole, so that the wire pressing plate 2g releases the wire, which is beneficial to improving the wire removal efficiency.

[0157] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the 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 is provided with at least one protective pole assembly cavity; characterized in that: Each of the protection poles comprises an operating button (1d), an operating mechanism (3) arranged in a protection pole assembly cavity and connected to the operating button (1d), a protection mechanism (4) drivingly 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) used in match 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 outlet terminal are arranged at one end of the circuit breaker housing, and the first inlet 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 is located on one side of the first inlet 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 between the first outlet terminal (11) and the arc extinguishing system (5) and is located on one side of the operating mechanism (3); The plug-in circuit breaker is in a closed state, and the operating mechanism (3) is in a locked state. When a short circuit fault or an overload fault occurs, the protection mechanism (4) drives the operating mechanism (3) to trip, the plug-in circuit breaker trips and the operating mechanism (3) enters a tripped state. The operating button (1d) is pulled to move in the opening direction, and the operating mechanism (3) is driven to return to the locked state, and the plug-in circuit breaker enters an opening state. The operating mechanism (3) includes a tripping catch (32) and a lock catch (36). The protection mechanism (4) includes a yoke (40) and a bimetallic strip (42). When a short circuit fault occurs, the lock catch (36) is attracted to swing in the direction of the yoke (40) to release the lock fit with the lock catch (32). When an overload fault occurs, the bimetallic strip (42) drives the lock catch (36) to swing in the direction of the yoke (40) to release the lock fit with the tripping catch (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) and a main tension spring (33); 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 lock button (36) is rotatably arranged in the middle part, one end is connected to a 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).

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

4. The plug-in circuit breaker according to claim 2, characterized in that: The contact support rod (31) is an overall bow-shaped structure, one end of which is provided with a support rod rotating shaft (311) rotatably connected to the operating handle (30), and the other end of which is provided with a moving contact (61), the moving contact (61) comprising 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), the other end of the moving contact plate (610) being 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 stationary contact (62), and 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 stationary contact (62).

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 respectively pivotally arranged on the circuit breaker housing, a polygonal hole (4410) being arranged in the middle of the linkage shaft (441) along its axial direction, and a linkage member actuated platform (442) being arranged on the side of the linkage rod (440) opposite to the trip button (32); and a linkage member driving platform (322) drivingly matched with the linkage member actuated platform (442) being arranged on the second arm (32b) of the trip button; The plug-in circuit breaker comprises a plurality of protection poles, the linkage shafts (441) of the plurality of protection poles are connected via a linkage member connecting shaft, the linkage member connecting shafts respectively cooperate with the polygonal holes (4410) of the linkage members (44), when a certain protection pole trips, the linkage member driving platform (322) of the tripping buckle (32) of the protection pole drives the linkage rod (440) to swing via the linkage member receiving platform (442), the linkage rod (440) drives the linkage shaft (441) to rotate, drives the linkage rods (440) of other protection poles to swing, respectively strikes the lock buckles (36) of the protection poles, and causes the protection poles to trip synchronously.

6. The plug-in circuit breaker according to claim 2, characterized in that: 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 between the yoke (40) and the lock (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 drivingly matched with the lock (36) and electrically connected to the moving contact (61).

7. The plug-in circuit breaker according to claim 6, 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 outlet terminal (11) through a first conductive plate (2b), and the other end is electrically connected to the contact support rod (31) through a flexible 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 6, characterized in that: The cross section of the yoke (40) is a U-shaped structure. One end of the yoke 40 is provided with two yoke support arms (400) arranged opposite to each other. The yoke support arms (400) are provided with a yoke limit groove (401). The lock (36) comprises 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. A lock support arm (361) is provided on both sides of the connection between the lock body (360) and the lock body (362); the lock driven end (364) is an L-shaped structure, one end of which 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 two yoke limit grooves (401); the lock body (362) and the yoke (40) are arranged opposite to each other; and the lock hole (363) is arranged on the lock body (362) to lock 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 outlet 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, characterized in that: It also includes an exhaust port (16) and an auxiliary signal terminal electrically connected to the first outlet terminal (11); the exhaust port (16), the auxiliary signal terminal and the first inlet terminal (110) are arranged at the same end of the circuit breaker housing; a first exhaust channel is also arranged in the protective pole assembly cavity; one end of the first exhaust channel is connected to the exhaust port 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).

11. The plug-in circuit breaker according to claim 1, characterized in that: It also includes a locking mechanism, which includes a first locking piece (9), one end of which is slidably arranged in the circuit breaker housing, and the other end of which is a first protrusion (90) protruding outside the circuit breaker housing; When the plug-in circuit breaker is assembled to 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 of the circuit breaker assembly position.

12. The plug-in circuit breaker according to claim 11, 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 drivingly engaged with the operating button (1d), and the other end of which is drivingly engaged 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 engagement between the first protrusion (90) and the housing of the circuit breaker assembly position.

13. The plug-in circuit breaker according to claim 12, characterized in that: The second locking member (8) further comprises a second protrusion (82), and the second protrusion (82) is arranged 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 piece (8) to rotate, 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 piece (8) to rotate, so that the second protrusion (82) moves into the circuit breaker housing.

Images