CN117976483A - Tripping device and circuit breaker thereof - Google Patents

Abstract

The application discloses a tripping device which comprises a spring pull rod, a tripping rod, a counter-force spring and a pull rod, and a circuit breaker, wherein the circuit breaker comprises a pull rod, a first adjusting button, a second adjusting button, a first adjusting rod, a second adjusting rod, the tripping device, a bimetal element and an adjusting cap.

Description

Tripping device and circuit breaker thereof

Technical Field

The invention relates to the technical field of universal circuit breakers of piezoelectric devices, in particular to a tripping device and a circuit breaker thereof.

Background

The circuit breaker is used as a protective electric appliance of a low-voltage distribution and motor protection loop, and is used for bearing the functions of overload and short-circuit protection, when overload current occurs to a circuit, a tripping device of the circuit breaker can perform tripping action to push the circuit breaker to trip so as to switch the circuit, and equipment and elements in a circuit system are protected from damage. When the tripping device generates large current on a circuit, the large current exciting coil generates magnetic force to attract and actuate the armature to act, and the armature drives the tripping rod to push the traction rod of the circuit breaker to realize the tripping protection of the circuit breaker.

The utility model discloses an electromagnetic means of moulded case circuit breaker as disclosed in patent document of application publication number CN107464730A, wherein electromagnetic means includes actuating connection's electromagnetic mechanism and adjustment mechanism, electromagnetic mechanism includes the iron core, armature, rotates piece and installing support, and armature and circuit breaker's traction lever is connected for drive circuit breaker short circuit and release, and the one end elastic connection of armature is on the iron core, forms the air gap between the other end perk of armature and the iron core, the middle part pivot of rotating the piece is installed in the top of installing support upper armature, and drive end and the trigger end that are located the rotating piece both ends set up respectively on the driving face of cam and the perk end of armature, and adjustment mechanism's cam is rotatory, and the both ends of the rotating piece that drive electromagnetic mechanism use the middle part to do the luffing motion, and the trigger end of rotating the piece drives the perk end of armature reciprocate for the iron core.

However, in the above proposal, when in adjustment, the spring and the magnetic air gap are synchronously changed, and the adjustment is unreliable

Disclosure of Invention

Aiming at the defects of the prior art, the application provides a tripping device and a circuit breaker thereof, so as to solve the problem of poor adjustment reliability in the prior art.

In order to achieve the above purpose, the application is realized by the following technical scheme:

The utility model provides a trip gear, is including installing armature subassembly and quiet core subassembly between first support and second support, first support is the U-shaped, the second support is the C shape, quiet core subassembly fixed mounting is located the lower part between first support and the second support, with the U-shaped parallel and level of second support, armature subassembly one end rotatable mounting is middle part between first support and second support, and its rotation axis one end is located the non-open end middle part of second support, and the other end is located first support upper portion, the one end that the armature subassembly other end corresponds with quiet core subassembly forms the opening, trip gear still includes spring pull rod, tripping lever, reaction spring, pull rod, but second support non-open end upper portion rotatable mounting has the parallel spring pull rod of middle part rotation axis and armature subassembly rotation axis, the spring pull rod upwards and downwards extend respectively have top and bottom from the middle part rotation axis, the top in the middle of armature subassembly is provided with outstanding slot feature, the armature subassembly passes through slot feature and spring one end fixed, the spring other end is fixed in the spring bottom, the second support upper bracket is provided with the first support upper end, the upper bracket is provided with the counter-force screw to the first support, the upper end is provided with the horizontal adjustment platform vertical adjustment platform is perpendicular to the upper end of the counter-force screw, but the upper end is provided with the vertical adjustment platform is perpendicular to the upper end of the first support, the upper end of the counter-force support is bent.

Preferably, the static iron core component is formed by superposing a plurality of U-shaped sheet-shaped magnetic yokes, convex hull features are arranged at the same positions on one surface of the magnetic yokes, pit features are formed at the same positions on the back of the convex hull features, and the U-shaped sheet-shaped magnetic yokes are mutually pressed together into a whole through the convex hull features and the pit features.

Preferably, the armature assembly is formed by superposing a plurality of sheet-shaped magnet yokes II and III, a through hole for installing a pull rod is formed in the middle of the armature assembly, convex hull features are arranged on the same positions of the surfaces of the magnet yokes II and III, concave pit features are formed on the same positions of the backs of the convex hull features, and the plurality of U-shaped sheet-shaped magnet yokes II and III are mutually pressed and connected together into a whole through the convex hull features and the concave pit features.

Preferably, the top of the yoke three middle is provided with protruding groove features.

Preferably, the grooves are characterized as semi-circular.

Preferably, the first bracket, the static iron core component and the second bracket are provided with rivet holes at corresponding positions, and the static iron core component is fixedly arranged between the first bracket and the second bracket through rivets.

Preferably, the middle part of the spring pull rod is fixedly arranged on the second bracket through a rivet.

Preferably, the trip bar is fixedly mounted on the vertical bending platform of the second bracket through rivets.

Based on the same inventive concept, the application also provides a circuit breaker, which comprises a moving contact, a connecting plate, a base, a side plate and a shell, wherein a contact rod is arranged on the moving contact, the circuit breaker also comprises a traction rod, a first adjusting button, a second adjusting button, a first adjusting rod, a second adjusting rod, a tripping device, a bimetal element and an adjusting cap, wherein the tripping device and the connecting plate are arranged on the base, the connecting plate is pressed in a U-shaped opening formed by a first bracket, a second bracket and a static iron core component of the tripping device, one end of the connecting plate is connected with the moving contact, the traction rod is arranged on a horizontal shaft on the side plate and is provided with a traction arm and a contact arm which are opposite in direction, the traction arm faces to the second adjusting rod, the first adjusting button and the second adjusting button are vertically arranged on the shell and can rotate in the horizontal direction, the first adjusting rod and the second adjusting rod are horizontally arranged outside the side plates through fixing pieces and can move along the axial direction of the side plates, the first adjusting button and the first adjusting rod are linked to enable the first adjusting rod to move along the axial direction, the second adjusting button and the second adjusting rod are linked to enable the second adjusting rod to move along the axial direction, a pushing arm and a first pushing feature are arranged on the second adjusting rod, the pushing arm is arranged at the top contact position of a spring pull rod of the tripping device to push the spring pull rod to pull the counter force spring, the first pushing feature position corresponds to the bottom position of the first adjusting button, the tripping arm, the second pushing feature, the traction counter arm and the adjusting arm are arranged on the second adjusting rod, a bimetal element is arranged on the connecting plate, an adjusting cap is arranged at the top of the bimetal element, the adjusting arm is arranged at the position corresponding to the adjusting cap, the adjusting cap top is provided with the trapezoidal characteristic that the horizontal direction faces the second regulation pole, form horizontal thermal gap one between trapezoidal characteristic and the adjusting arm, pull the arm setting and just install adjusting screw above the trailing arm of trailing arm on the trailing arm of trailing arm, adjusting screw and trailing arm of trailing arm form vertically thermal gap two, tripping arm position is relative with tripping device's tripping lever top, second promotion characteristic position corresponds with second adjusting knob bottom position.

Preferably, the bottom of the first adjusting button is a cam, the first pushing feature is an upward oval boss, the edge of the first pushing feature is meshed with the outer edge of the cam, the bottom of the second adjusting button is a vertical rocker, and the second pushing feature is a parallel inverted L-shaped clamping arm and clamps the vertical rocker.

Compared with the prior art, the scheme has the beneficial effects that: according to the tripping device, when the tripping device is adjusted, only the counterforce spring is adjusted, so that the phenomenon of magnetic saturation can be effectively avoided, and the current setting range is enlarged by the same tripping structure. Reliable structure, simple and convenient adjustment, and flexible adjustment. The tripping device is of an opening structure, so that the assembly of a circuit breaker product is facilitated. Meanwhile, the application also comprises an overload tripping device, when overload current occurs in the circuit, the bimetal element bends to push the second adjusting rod, the thermal tripping gap is a first heating gap II, the second adjusting rod integrally pushes the traction rod, and the mechanism trips to switch current, so that protection is realized.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a circuit breaker according to the present application;

fig. 2a is a schematic perspective view of a trip device according to an embodiment of the present application;

FIG. 2b is a schematic perspective view of the trip device of the present application from the opposite side of FIG. 2 a;

fig. 3 is a schematic perspective view illustrating a static iron core assembly according to an embodiment of the present application;

fig. 4a is a schematic perspective view of an armature assembly according to an embodiment of the application;

Fig. 4b is a schematic perspective view of the armature assembly from the opposite side of fig. 4a in accordance with an embodiment of the application;

FIG. 5 is a schematic perspective view of a trip bar according to an embodiment of the present application;

FIG. 6 is a schematic perspective view of a spring tie rod according to an embodiment of the present application;

FIG. 7 is a schematic perspective view of a pull rod according to an embodiment of the present application;

FIG. 8 is a schematic perspective view of a first bracket according to an embodiment of the present application;

FIG. 9 is a schematic perspective view of a second bracket according to an embodiment of the present application;

FIG. 10 is a schematic perspective view of a bimetal element and an adjusting cap according to an embodiment of the present application;

FIG. 11 is a schematic view illustrating another view angle structure of rotating the second adjusting knob according to an embodiment of the present application;

FIG. 12 is a schematic view of an opening of a trip device according to an embodiment of the present application;

FIG. 13 is a schematic view showing another view angle structure of rotating the first adjusting knob according to an embodiment of the present application;

The device comprises a 1-traction rod, a 101-traction arm, a 102-contact arm, a 2-first adjusting button, a 3-second adjusting button, a 4-first adjusting rod, a 41-pushing arm, a 42-first pushing feature, a 5-second adjusting rod, a 51-tripping arm, a 52-second pushing feature, a 53-traction counter arm, a 54-adjusting arm, a 55-adjusting screw, a 6-tripping device, a 601-spring pull rod, a 602-tripping rod, a 603-armature assembly, a 6031-yoke two, a 6032-yoke three, a 60321-groove feature, a 604-static iron core assembly, a 6041-yoke one, a 605-counter spring, a 606-pull rod, a 607-first bracket, a 608-second bracket, a 609-rivet, a 610-adjusting screw, 611-convex hull feature, a 612-concave feature, a 7-bimetallic element, an 8-adjusting cap, a 9-moving contact, a 91-contact rod, a 10-connecting plate, an 11-base, a 12-side plate, a 131-magnetic gap one, a 132-thermal gap one, a 133-thermal gap two.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

The embodiment provides a technical scheme that: the trip device disclosed by the scheme comprises an armature component 603, a static iron core component 604, a spring pull rod 601, a trip rod 602, a counter-force spring 605 and a pull rod 606 which are arranged between a first bracket 607 and a second bracket 608, wherein the first bracket 607 is U-shaped, the second bracket 608 is C-shaped, the static iron core component 604 is fixedly arranged at the lower part between the first bracket 607 and the second bracket 608 and is flush with the U-shape of the second bracket 608, one end of the armature component 603 is rotatably arranged in the middle between the first bracket 607 and the second bracket 608, one end of a rotating shaft is positioned in the middle of the non-open end of the second bracket 608, the other end of the rotating shaft is positioned at the upper part of one end of the first bracket 607, one end of the other end of the armature component 603 corresponds to the static iron core component 604 to form an opening which is also the first magnetic gap 131, and the trip device adopts an opening type design, so that the main circuit of a product is more beneficial to the assembly of a connecting plate, the upper part of the non-opening end of the second bracket 608 is rotatably provided with a spring pull rod 601 with a middle rotating shaft parallel to the rotating shaft of the armature component 603, the spring pull rod 601 extends upwards and downwards from the middle rotating shaft to form a top end and a bottom end respectively, the middle top of the armature component 603 is provided with a protruding groove feature 60321, the armature component 603 is fixed with one end of a counter-force spring 605 through the groove feature 60321, the other end of the counter-force spring 605 is fixed at the bottom end of the spring pull rod 601, the upper part of the opening end of the second bracket 608 is provided with a horizontal bending platform facing the direction of the first bracket 607, the horizontal bending platform is provided with an adjusting screw 610, the bottom of the adjusting screw 610 is propped against the top of the far-end of the armature component 603, the magnetic gap one 131 can be finely adjusted through rotating the top of the adjusting screw 610, the reliability of the setting current is ensured, the universality is strong, the upper part of the non-opening end of the second bracket 608 is provided with a vertical bending platform in the direction of the first bracket 607, a tripping rod 602 with a rotating shaft perpendicular to the rotating shaft of the armature component 603 is rotatably arranged on the vertical bending platform, a pull rod 606 is arranged between the bottom of the tripping rod 602 and the middle part of the armature component 603, and the tripping rod 602 can be driven to rotate when the armature component 603 rotates.

The static iron core assembly 604 is formed by superposing seven U-shaped sheet-shaped magnetic yoke first 6041, convex hull features 611 are arranged at the same position on the surface of the magnetic yoke first 6041, pit features 612 are formed at the same position on the back of the convex hull features 611, and the U-shaped sheet-shaped magnetic yoke first 6041 is mutually pressed and connected into a whole through the convex hull features 611 and the pit features 612. Similarly, the armature assembly 603 is formed by overlapping four sheet-shaped magnet yokes two 6031 and two magnet yokes three 6032, a through hole for installing the pull rod 606 is formed in the middle of the armature assembly, the magnet yokes three 6032 on two sides are located in the middle, convex hull features 611 are arranged on the same positions of the surfaces of the magnet yokes two 6031 and three 6032, concave pit features 612 are formed on the same positions of the back surfaces of the convex hull features 611, and the four U-shaped sheet-shaped magnet yokes two 6031 and two magnet yokes three 6032 are mutually pressed and connected together into a whole through the convex hull features 611 and the concave pit features 612. The top of the middle two-piece yoke three 6032 is provided with protruding groove features 60321, the groove features 60321 being semi-circular for securing one end of the reaction spring 605.

In this embodiment, for convenience of installation, most of the components are installed by rivets, and other shaft installation modes may be used, specifically: rivet holes are formed in the corresponding positions of the first bracket 607, the static iron core assembly 604 and the second bracket 608, and the static iron core assembly 604 is fixedly arranged between the first bracket 607 and the second bracket 608 through rivets 609; the middle part of the spring pull rod 601 is fixedly arranged on the second bracket 608 through a rivet 609; the trip bar 602 is fixedly mounted to the vertically bent platform of the second bracket 608 by rivets 609.

Based on the same inventive concept, the application also provides a circuit breaker embodiment comprising three moving contact 9 assemblies, three coupling plates 10, a base 11, two side plates 12, a housing (not shown), a drawbar 1, a first adjusting knob 2, a second adjusting knob 3, a first adjusting lever 4, a second adjusting lever 5, three aforementioned trip devices 6, three bimetal elements 7 and three adjusting caps 8, said third moving contact 9 being provided with a contact rod 91, said third trip devices 6 and three coupling plates 10 being mounted on the base 11 at three mounting positions and each coupling plate 10 being pressed in a U-shaped opening formed by the corresponding trip device 6, the second bracket 608 and the stationary core assembly 604, one end of said three coupling plates 10 being connected to one end of the third moving contact 9 respectively, said drawbar 1 being mounted on a horizontal shaft on the side plate 12 and provided with a counter-directed pulling arm 101 and a contact arm 102, said pulling arm 101 being mounted for movement in the second adjusting knob 4 in the axial direction, said second adjusting lever 5 being rotatably mounted on the second adjusting knob 4 in the axial direction by means of the second adjusting lever 5, said second adjusting knob 5 being rotatably mounted on the second adjusting lever 5 and axially movable in the second adjusting knob 4 by means of the second adjusting knob 4, said second adjusting knob 5 being rotatably mounted in the axial direction of the second adjusting knob 4, the three pushing arms 41 are respectively arranged at the top end contact positions of the spring pull rods 601 of the three tripping devices 6 to push the spring pull rods 601 to pull the counter-force springs 605 of the spring pull rods, the positions of the first pushing characteristics 42 correspond to the positions of the bottoms of the first adjusting buttons 2, the second adjusting rods 5 are provided with three tripping arms 51, one second pushing characteristic 52, one traction counter-arm 53 and three adjusting arms 54, three bimetal elements 7 are respectively arranged on the three connecting plates 10, one adjusting cap 8 is arranged at the top of each bimetal element 7, each adjusting arm 54 is arranged at the position corresponding to the adjusting cap 8, the top of each adjusting cap 8 is provided with a trapezoidal characteristic facing the second adjusting rods 5 in the horizontal direction, a horizontal thermal gap one 132 is formed between the trapezoidal characteristic and each adjusting arm 54, one traction counter-arm 53 is arranged above the traction arm 11 of the traction rod 1, an adjusting screw 55 is arranged on the traction arm 53, the adjusting screw 55 and the traction arm 11 of the traction rod 1 forms a vertical thermal gap two, and the three thermal gap arms 55 correspond to the positions of the tripping devices 51 and the positions of the three tripping arms 3 correspond to the positions of the corresponding tripping devices 52 and the positions of the bottom parts of the third adjusting buttons 6. In this embodiment, both the adjustment bars are integrally injection molded with the features or arms thereon.

When the first adjusting knob 2 rotates, the first adjusting lever 4 is pushed, so that the spring levers 601 of the three trip devices 6 are pushed, and the reaction force springs 605 are elongated, so that the reaction force increases. When the second adjusting knob 3 rotates, the second adjusting rod 5 is pushed to adjust the trapezoid characteristic of the cap 8, and when the axial position of the first adjusting rod 4 is adjusted, the first thermal gap 132 can be adjusted, so that different setting currents are realized by the same thermal tripping mechanism. The adjusting screw 55 can finely adjust the second thermal gap 133, thereby improving the reliability of the setting current and having good versatility.

For the transmission mode of the first adjusting knob 2 and the first adjusting lever 4 and the transmission mode of the second adjusting knob 3 and the second adjusting lever 5, because in this embodiment, the two adjusting levers are parallel in the horizontal direction, the mode adopted in this embodiment is: the first knob 2 is a cam at the bottom, the first push feature 42 is an upward oval boss with an edge engaging the cam outer edge, the second knob 3 is a vertical rocker at the bottom, and the second push feature 52 is a parallel inverted-L shaped clamp arm and clamps the vertical rocker. The transmission mode is not unique, and can be in other modes as long as the transmission modes do not interfere with each other.

In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art should be able to substitute or change the technical solution and the inventive concept according to the present application within the scope of the present application.

Claims (10)

1. The utility model provides a trip gear, includes armature subassembly (603) and quiet iron core subassembly (604) of installing between first support (607) and second support (608), first support (607) are the U-shaped, second support (608) are the C shape, quiet iron core subassembly (604) fixed mounting is in the lower part between first support (607) and second support (608), with the U-shaped parallel and level of second support (608), armature subassembly (603) one end rotatable mounting is in the middle part between first support (607) and second support (608), and its rotation axis one end is located second support (608) non-open end middle part, and the other end is located first support (607) one end upper portion, the one end that armature subassembly (603) other end and quiet iron core subassembly (604) correspond forms the opening, its characterized in that: still include spring pull rod (601), release lever (602), reaction spring (605), pull rod (606), second support (608) non-open end upper portion rotatable mounting has middle part rotation axis and armature subassembly (603) parallel spring pull rod (601) of rotation axis, spring pull rod (601) upwards and downwards extend respectively from the middle part rotation axis has top and bottom, the top in the middle of armature subassembly (603) is provided with outstanding slot feature (60321), armature subassembly (603) are fixed with reaction spring (605) one end through slot feature (60321), reaction spring (605) other end is fixed in spring pull rod (601) bottom, second support (608) open end upper portion is provided with the horizontal bending platform to first support (607) direction, install adjusting screw (610) on the horizontal bending platform, adjusting screw (610) bottom and armature subassembly (603) far away top, second axle head (608) non-open end upper portion is provided with the vertical bending platform to first support (603) direction, vertical bending platform (603) is provided with on the vertical bending platform to the rotation axis (603) and can install between release lever (602) and the rotation axis (603) and the release lever (602).

2. The trip unit of claim 1, wherein: the static iron core assembly (604) is formed by superposing a plurality of U-shaped sheet-shaped magnet yoke I (6041), convex hull features (611) are arranged on the same positions on the surface of the magnet yoke I (6041) and pit features (612) are formed on the same positions on the back of the convex hull features (611), and the plurality of U-shaped sheet-shaped magnet yoke I (6041) are mutually pressed together into a whole through the convex hull features (611) and the pit features (612).

3. The trip unit of claim 1, wherein: the armature assembly (603) is formed by superposing a plurality of sheet-shaped magnet yoke II (6031) and magnet yoke III (6032), a through hole for installing a pull rod (606) is formed in the middle of the armature assembly, convex hull features (611) are arranged on the same positions of the surfaces of the magnet yoke II (6031) and the magnet yoke III (6032), pit features (612) are formed on the same positions of the back surfaces of the convex hull features (611), and a plurality of U-shaped sheet-shaped magnet yoke II (6031) and magnet yoke III (6032) are mutually pressed and connected together into a whole through the convex hull features (611) and the pit features (612).

4. The trip unit of claim 3, wherein: the top of the yoke tri (6032) middle is provided with protruding groove features (60321).

5. The trip unit of claim 4, wherein: the trench features (60321) are semi-circular.

6. The trip unit of claim 1, wherein: rivet holes are formed in corresponding positions of the first bracket (607), the static iron core assembly (604) and the second bracket (608), and the static iron core assembly (604) is fixedly installed between the first bracket (607) and the second bracket (608) through rivets (609).

7. The trip unit of claim 1, wherein: the middle part of the spring pull rod (601) is fixedly arranged on the second bracket (608) through a rivet (609).

8. The trip unit of claim 1, wherein: the tripping rod (602) is fixedly arranged on the vertical bending platform of the second bracket (608) through a rivet (609).

9. The utility model provides a circuit breaker, includes moving contact (9), link plate (10), base (11), curb plate (12), shell, install contact pole (91), its characterized in that on moving contact (9): the device further comprises a pull rod (1), a first adjusting knob (2), a second adjusting knob (3), a first adjusting rod (4), a second adjusting rod (5), a tripping device (6) according to one of claims 1 to 5, a bimetal element (7) and an adjusting cap (8), wherein the tripping device (6) and a connecting plate (10) are arranged on a base (11) and the connecting plate (10) is pressed in a U-shaped opening formed by a first bracket (607), a second bracket (608) and a static iron core assembly (604) of the tripping device (6), one end of the connecting plate (10) is connected with a moving contact (9), the pull rod (1) is arranged on a horizontal shaft on a side plate (12) and is provided with a pulling arm (101) and a contact arm (102) which are opposite in direction, the pulling arm (101) faces the direction of the second adjusting rod (5), the contact arm (102) is opposite to the contact rod (91), the first adjusting knob (2) is arranged on a housing vertically and can rotate in the horizontal direction, the first adjusting rod (4) can move along the axial direction of the first adjusting rod (4), the second adjusting button (3) and the second adjusting rod (5) are linked to enable the second adjusting rod (5) to move along the axial direction, a pushing arm (41) and a first pushing feature (42) are arranged on the second adjusting rod (5), the pushing arm (41) is arranged at the top end contact position of a spring pull rod (601) of the tripping device (6) to push the spring pull rod (601) to pull a counter-force spring (605), the first pushing feature (42) corresponds to the bottom position of the first adjusting button (2), a tripping arm (51), a second pushing feature (52), a traction counter-arm (53) and an adjusting arm (54) are arranged on the second adjusting rod (5), a bimetal element (7) is arranged on the connecting plate (10), an adjusting cap (8) is arranged at the top of the bimetal element (7), a trapezoid feature facing the second adjusting rod (5) in the horizontal direction is arranged at the top of the adjusting cap (8), a clearance (55) is formed between the trapezoid feature and the adjusting arm (54) and the adjusting arm (53), a traction screw (11) is arranged on the traction screw (1), the adjusting screw (55) and the traction arm (11) of the traction rod (1) form a vertical thermal clearance II (133), the tripping arm (51) is positioned opposite to the top of the tripping rod (602) of the tripping device (6), and the second pushing feature (52) is positioned corresponding to the bottom position of the second adjusting button (3).

10. The circuit breaker according to claim 9, characterized in that: the bottom of the first adjusting button (2) is a cam, the first pushing feature (42) is an upward oval boss, the edge of the first pushing feature is meshed with the outer edge of the cam, the bottom of the second adjusting button (3) is a vertical rocker, and the second pushing feature (52) is a parallel inverted L-shaped clamping arm and clamps the vertical rocker.