CN218351299U - Contact mechanism and switchgear - Google Patents

Abstract

The utility model provides a contact mechanism and switch equipment, wherein a movable main contact is provided with a second through channel, and a movable arc contact is arranged in the second through channel; the moving contact assembly also comprises an elastic piece which is arranged in the second penetrating channel; the elastic piece is located the one side that deviates from the fixed contact subassembly of moving arcing contact, and the first end and the moving arcing contact fixed connection of elastic piece. In the process that the moving contact component is far away from the static contact component to carry out brake opening, the moving arc contact does not move along with the moving main contact through the clamping and matching of the first matching part and the second matching part, and the elastic component is stretched; the first matching part and the second matching part which are abutted to each other are separated through the clamping matching of the third matching part and the fourth matching part, and then the movable arc contact is separated from the static arc contact under the elastic acting force of the elastic piece. The contact mechanism can solve the problem that the contact is seriously ablated by the electric arc due to the fact that large bus conversion current is cut in the prior art.

Description

Contact mechanism and switchgear

Technical Field

The utility model relates to a switchgear field particularly, relates to a contact mechanism and switchgear.

Background

In a high-voltage switch, a disconnector of metal enclosed switchgear has a working condition of bus-bar cut-circulation in an operation working condition, and the current and voltage values of the bus-bar cut-circulation are required to be increased along with the increase of the bus-bar length and rated current parameters of the switchgear; the maximum value of the bus conversion current value in the IEC62271-102 standard of the 2013 version is 1600A, the bus conversion current value in the IEC62271-102 standard of the 2018 version which is executed at present is 60% of the rated current, and the maximum value is 4000A; therefore, the test current calculated according to the maximum current is 2.5 times of the original test current, which is a great test for whether the static arc contact and the moving arc contact can bear the ablation of the electric arc, and the test passing difficulty is very large according to the conventional structure (the static arc contact and the moving arc contact are separated slowly).

Therefore, the contact structure of the existing switch equipment has the problem that the static arc contact and the moving arc contact are seriously ablated by electric arcs due to the fact that large bus conversion current is cut.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a contact mechanism and switchgear to solve the problem that the contact structure of switchgear in the prior art has the problem that the static arc contact and the moving arc contact are seriously ablated by the arc due to the large bus conversion current.

In order to achieve the above object, according to one aspect of the present invention, there is provided a contact mechanism including a stationary contact assembly and a movable contact assembly movably disposed in a preset direction to be close to or far from the stationary contact assembly; the moving contact component comprises a moving main contact and a moving arc contact, and the static contact component comprises a static main contact and a static arc contact; the movable main contact is provided with a second penetrating channel, the extending direction of the second penetrating channel is parallel to or the same as the preset direction, and one end of the second penetrating channel extends to the outer wall surface of the movable main contact; the moving arc contact is arranged in the second penetrating channel in a penetrating way; the movable contact assembly also comprises an elastic piece which is arranged in the second penetrating channel and is telescopically arranged along the extending direction of the second penetrating channel; the elastic part is positioned on one side of the moving arc contact, which is far away from the fixed contact component, and the first end of the elastic part is fixedly connected with the moving arc contact; the static arc contact is provided with a first matching part, the moving arc contact is provided with a second matching part, so that the moving arc contact does not move along with the moving main contact through the clamping matching of the first matching part and the second matching part in the process of opening the brake, and the elastic piece is stretched; the inner wall of the second penetrating channel is provided with a third matching portion, the peripheral wall of the moving arc contact is provided with a fourth matching portion, and the first matching portion and the second matching portion are separated through the clamping matching of the third matching portion and the fourth matching portion, so that the moving arc contact is separated from the static arc contact under the elastic action force of the elastic piece.

Furthermore, the movable arc contact is provided with a first penetrating channel for the static arc contact to penetrate through, and the extending direction of the first penetrating channel is parallel to or the same as the preset direction; a first protruding part is convexly arranged on the peripheral wall of the contact end of the static arc contact, a second protruding part is convexly arranged on the inner wall of the first penetrating channel and is used for being abutted against the first protruding part, and a first matching part and a second matching part are respectively formed by the first protruding part and the second protruding part; at least part of the surface body of the contact surface between the second protruding part and the first protruding part and the extension direction of the first penetrating channel are arranged in a preset acute angle, and the preset acute angle is arranged towards the moving contact component so that the static arc contact penetrates into the first penetrating channel or is moved out of the first penetrating channel; and/or the inner wall of the second through channel is convexly provided with a third protruding part, the outer peripheral wall of the moving arc contact is convexly provided with a fourth protruding part, the third protruding part is used for being abutted against the fourth protruding part, and the third protruding part and the fourth protruding part respectively form a third matching part and a fourth matching part.

Furthermore, the moving arc contact is of a strip structure, and the extending direction of the moving arc contact is parallel to or the same as the preset direction; one end of the first penetrating channel extends to the end face of the moving arc contact, which faces one end of the fixed contact assembly; and/or the static arc contact is in a strip structure, and the extension direction of the static arc contact is parallel to or the same as the preset direction; and/or the movable main contact is in a strip structure, and the extending direction of the movable main contact is parallel to or the same as the preset direction; one end of the second penetrating channel extends to the end face of one end, facing the fixed contact assembly, of the moving arc contact; the outer peripheral wall of the movable main contact is used for contacting with the static main contact; and/or the static main contact is provided with an accommodating cavity and a preset opening communicated with the accommodating cavity, the static arc contact is arranged in the accommodating cavity, and the contact end of the static arc contact is positioned at the preset opening; the inner wall surface of the preset opening is used for being in contact with the movable main contact.

Further, when the contact mechanism is in a closing state, the movable main contact is in contact with the static main contact to conduct electricity; part of the body of the static arc contact penetrates through the first penetrating channel, the second protruding parts and the first protruding parts are distributed at intervals along the extending direction of the first penetrating channel, and the second protruding parts are in contact conduction with the outer peripheral wall of the static arc contact; the third protruding part is positioned on one side of the fourth protruding part far away from the elastic part along the extending direction of the second penetrating channel, and the third protruding part and the fourth protruding part are distributed at intervals along the extending direction of the second penetrating channel; wherein an axial spacing between the third projection and the fourth projection is greater than an axial spacing between the first projection and the second projection.

Further, the static contact assembly further comprises a first spring contact finger, the first spring contact finger is arranged on the static main contact, and the static main contact is in contact with the movable main contact through the first spring contact finger.

Furthermore, the second penetrating channel comprises a first channel section, a second channel section and a third channel section which are sequentially arranged along the extending direction of the second penetrating channel; along the direction perpendicular to the extending direction of the second penetrating channel, the inner wall surface of the second channel section is positioned on one side, close to the central axis of the second penetrating channel, of the inner wall surface of the first channel section, and the inner wall surface of the second channel section is positioned on one side, close to the central axis of the second penetrating channel, of the inner wall surface of the third channel section; the elastic piece is arranged in the second penetrating channel, and the moving arc contact is arranged in the third channel section in a penetrating way; the moving contact subassembly still includes: the positioning plate is arranged in the first channel section, and the second end of the elastic piece is fixedly connected with the positioning plate; the plate surface of the positioning plate is abutted against the step surface formed by the first channel section and the second channel section.

Further, the contact mechanism further comprises: the conductor part is fixedly arranged and provided with a third penetrating channel, the movable main contact movably penetrates through the third penetrating channel, and the inner wall of the third penetrating channel is in contact conduction with the outer peripheral wall of the movable main contact.

Further, the contact mechanism further comprises: the third spring contact finger is arranged on the inner wall surface of the third penetrating channel, and the inner wall of the third penetrating channel is in contact with the outer peripheral wall of the movable main contact through the third spring contact finger; the guide ring is arranged between the movable main contact and the inner wall of the third through channel so as to movably arrange the movable main contact relative to the conductor part; and/or a fixedly arranged shielding cover, wherein the shielding cover is provided with a fourth penetrating channel, the conductor part is fixedly penetrated in the fourth penetrating channel, and the movable main contact is movably penetrated in the fourth penetrating channel.

Further, the moving contact subassembly still includes: the watchband touches the finger, is provided with the fourth storage tank on the fourth bulge, and watchband touches partial body of finger and fixes setting up in the fourth storage tank, and the moving arc contact touches the finger through the watchband and moves main contact electrically conductive.

According to another aspect of the present invention, a switchgear is provided, comprising a contact mechanism as described above.

Use the technical scheme of the utility model, contact mechanism includes the fixed contact subassembly of moving contact subassembly and fixed setting, the moving contact subassembly is including moving the main contact and moving the arc contact, the static contact subassembly includes quiet main contact and quiet arc contact, the moving contact subassembly is along predetermineeing the orientation movablely setting, so that it is close to or keep away from the quiet contact subassembly to make the moving contact subassembly, and then make the moving main contact be close to or keep away from quiet main contact, and make the moving arc contact be close to or keep away from quiet arc contact, thereby make moving main contact and quiet main contact or separation, and make moving arc contact and quiet arc contact or separation.

The movable main contact is provided with a second penetrating channel, the extending direction of the second penetrating channel is parallel to or the same as the preset direction, and one end of the second penetrating channel extends to the outer wall surface of the movable main contact; the moving arc contact is arranged in the second penetrating channel in a penetrating way; the movable contact assembly also comprises an elastic piece which is arranged in the second penetrating channel and is telescopically arranged along the extending direction of the second penetrating channel; the elastic piece is located the one side that deviates from the fixed contact subassembly of moving arcing contact, and the first end and the moving arcing contact fixed connection of elastic piece. The fixed arc contact is provided with a first matching part, the moving arc contact is provided with a second matching part, so that the moving arc contact and the fixed arc contact are relatively fixed through the clamping matching of the first matching part and the second matching part in the process that the moving contact component is far away from the fixed contact component to perform opening, even if the moving arc contact does not follow the movement of the moving main contact, and the elastic component is stretched; the inner wall of the second penetrating channel is provided with a third matching portion, the peripheral wall of the moving arc contact is provided with a fourth matching portion, and the first matching portion and the second matching portion are separated through the clamping matching of the third matching portion and the fourth matching portion, so that the moving arc contact is separated from the static arc contact under the elastic action force of the elastic piece. According to the structure, in the brake-separating process, the first matching part and the second matching part are in butt joint and match first, and then the third matching part and the fourth matching part are in butt joint and match.

In the process of opening the contact mechanism, the moving contact component moves along a preset direction and in the direction far away from the static contact component, and in the process of opening the contact mechanism, the moving contact component moves along the preset direction and in the direction far away from the static contact component, the moving contact component is provided with a first opening position, a second opening position and a final opening position which are sequentially distributed; when the movable contact assembly moves to the first switching-off position, the first matching part is abutted with the second matching part, so that the movable arc contact is blocked from moving continuously in the direction far away from the fixed contact assembly through the abutting matching of the first matching part and the second matching part, and the movable arc contact is kept in contact with the fixed arc contact; the movable main contact continues to move along the direction far away from the fixed contact assembly, the movable arc contact cannot move along with the movable main contact, the elastic piece begins to be stretched, and part of the body of the movable arc contact moves out of the second penetrating channel. When the movable contact assembly moves to the second switching-off position, the third matching part is abutted with the fourth matching part; when the movable main contact continues to move along the direction far away from the static contact assembly, the first matching part and the second matching part which are in butt joint can be separated through the butt joint of the third matching part and the fourth matching part, and then the movable arc contact can move along with the movable main contact and be separated from the static arc contact. When the moving arc contact is restored to the original state relative to the moving main contact, the moving contact component integrally moves to the final brake separating position along the direction far away from the static contact component, so that the brake separating operation is completed.

Therefore, the contact mechanism can realize the quick separation of the static arc contact and the moving arc contact, improves the separation speed of the static arc contact and the moving arc contact, reduces the time for the static arc contact and the moving arc contact to be ablated by electric arcs, thereby reducing the ablation phenomenon of the static arc contact and the moving arc contact, avoiding the static arc contact and the moving arc contact to be seriously ablated, and solving the problem that the static arc contact and the moving arc contact are seriously ablated by electric arcs due to the fact that the bus switching current is cut to be large in the contact structure of the switch equipment in the prior art.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic cross-sectional view of a contact mechanism according to the invention; wherein, the contact mechanism is in a closing state;

fig. 2 shows a schematic structural diagram of the moving contact assembly not yet moving to the first opening position when the contact mechanism performs the opening operation according to the present invention;

fig. 3 shows a schematic structural diagram of the movable contact assembly in the first opening position when the contact mechanism performs the opening operation according to the present invention;

fig. 4 shows a schematic structural diagram of the contact mechanism according to the present invention, in which the second protrusion abuts against the first protrusion when the opening operation is performed, and the moving arcing contact continues to move;

fig. 5 shows a schematic structural diagram of the moving contact assembly in the second opening position when the contact mechanism performs the opening operation according to the present invention;

fig. 6 shows a schematic structural view of the contact mechanism according to the present invention, when the opening operation is performed, the moving arc contact and the static arc contact are just separated;

fig. 7 shows a schematic structural diagram of the contact mechanism according to the present invention, in which the moving arcing contact is rapidly retracted to the second penetration passage after the moving arcing contact and the static arcing contact are separated during the opening operation;

fig. 8 shows a schematic structural view of the contact mechanism according to the present invention, in which the moving arcing contact is retracted into the second through passage after the moving arcing contact and the stationary arcing contact are separated during the opening operation;

fig. 9 shows a schematic structural diagram of the contact mechanism according to the present invention, when the contact mechanism performs a switching-off operation, the moving contact assembly is in a final switching-off position;

fig. 10 shows a schematic structural diagram of the movable contact assembly approaching the stationary contact assembly when the contact mechanism performs a closing operation according to the present invention;

fig. 11 shows a schematic structural view of a contact mechanism according to the invention.

Wherein the figures include the following reference numerals:

11. a movable main contact; 111. a second through passage; 1111. a first channel segment; 1112. a second channel segment; 1113. a third channel segment; 112. a third projecting portion; 113. a third mating portion; 12. a moving arc contact; 121. a first through passage; 122. a second projection; 123. a fourth projecting portion; 124. a second mating portion; 125. a fourth mating portion; 13. an elastic member; 131. a first platen; 132. a first fastener; 133. a second platen; 134. a second fastener; 14. positioning a plate; 16. a watchband contact finger;

21. a stationary main contact; 211. an accommodating chamber; 212. presetting an opening; 22. a stationary arc contact; 221. a first projecting portion; 222. a first mating portion; 23. a first spring finger;

40. a conductor part; 41. a third spring contact finger; 42. a guide ring; 50. a shield can.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The utility model provides a contact mechanism, please refer to fig. 1 to 11, contact mechanism includes the fixed contact subassembly of moving contact subassembly and fixed setting, the moving contact subassembly is including moving main contact 11 and moving arcing contact 12, the static contact subassembly includes quiet main contact 21 and quiet arcing contact 22, the moving contact subassembly is along predetermineeing the direction movablely setting up, so that make the moving contact subassembly be close to or keep away from the quiet contact subassembly, and then make moving main contact 11 be close to or keep away from quiet main contact 21, and make moving arcing contact 12 be close to or keep away from quiet arcing contact 22, thereby make moving main contact 11 and quiet main contact 21 contact or separation, and make moving arcing contact 12 and quiet arcing contact 22 contact or separation.

The movable main contact 11 is provided with a second penetrating channel 111, the extending direction of the second penetrating channel 111 is parallel to or the same as the preset direction, and one end of the second penetrating channel 111 extends to the outer wall surface of the movable main contact 11; the moving arc contact 12 is arranged in the second through channel 111 in a penetrating way; the movable contact assembly further comprises an elastic piece 13, and the elastic piece 13 is arranged in the second penetrating channel 111 and is telescopically arranged along the extending direction of the second penetrating channel 111; the elastic member 13 is located on one side of the moving arcing contact 12 away from the fixed contact assembly, and a first end of the elastic member 13 is fixedly connected with the moving arcing contact 12. The fixed arc contact 22 is provided with a first matching part 222, the moving arc contact 12 is provided with a second matching part 124, so that in the process that the moving contact component is far away from the fixed contact component to be opened, the moving arc contact 12 and the fixed arc contact 22 are relatively fixed through the clamping matching of the first matching part 222 and the second matching part 124, even if the moving arc contact 12 does not move along with the moving main contact 11, and the elastic element 13 is stretched; the inner wall of the second through channel 111 is provided with a third matching portion 113, and the outer peripheral wall of the moving arc contact 12 is provided with a fourth matching portion 125, so that the first matching portion 222 and the second matching portion 124 which are abutted against each other are separated through the clamping matching of the third matching portion 113 and the fourth matching portion 125, and further the moving arc contact 12 is separated from the stationary arc contact 22 under the elastic acting force of the elastic member 13. According to the above structure, during the opening process, the first engaging portion 222 and the second engaging portion 124 are first abutted and engaged, and then the third engaging portion 113 and the fourth engaging portion 125 are abutted and engaged.

In a specific implementation process, when the contact mechanism performs a closing operation, the movable contact assembly moves along a preset direction and along a direction close to the stationary contact assembly, so that the movable main contact 11 is close to the stationary main contact 21, and the movable arc contact 12 is close to the stationary arc contact 22; in the process that the movable contact assembly moves in the direction close to the fixed contact assembly to perform switching-on, and until the movable contact assembly completes the switching-on operation, the movable arc contact 12 and the movable main contact 11 are kept relatively fixed, namely the position of the movable arc contact 12 relative to the movable main contact 11 is kept unchanged.

When the contact mechanism is in a closing state, the movable main contact 11 is in contact with the static main contact 21 for conducting electricity, and the movable arc contact 12 is in contact with the static arc contact 22 for conducting electricity.

In the process of opening the contact mechanism, the moving contact component moves along the preset direction and along the direction far away from the static contact component, and in the process of opening the contact mechanism, the moving contact component moves along the preset direction and along the direction far away from the static contact component, the moving contact component is provided with a first opening position, a second opening position and a final opening position which are distributed in sequence; when the moving contact assembly moves to the first switching position, the first matching part 222 is abutted with the second matching part 124, so that the abutting fit of the first matching part 222 and the second matching part 124 can block the moving arc contact 12 continuously moving along the direction far away from the fixed contact assembly, and the moving arc contact 12 is kept in contact with the fixed arc contact 22; the movable contact 11 continues to move in the direction away from the fixed contact assembly, the movable arcing contact 12 cannot move along with the movable contact 11, the elastic piece 13 starts to be stretched, and part of the body of the movable arcing contact 12 moves out of the second penetrating channel 111. When the movable contact assembly moves to the second switching position, the third matching part 113 and the fourth matching part 125 are abutted; when the movable main contact 11 continues to move in the direction away from the stationary contact assembly, the third mating portion 113 and the fourth mating portion 125 are in abutting fit, so that the first mating portion 222 and the second mating portion 124 which are in abutting joint can be separated, the movable arc contact 12 can move along with the movable main contact 11 and be separated from the stationary arc contact 22, wherein a certain distance is formed between the movable main contact 11 and the stationary main contact 21 in the preset direction, and the spring acting force of the elastic member 13 is added, so that the stationary arc contact 22 and the movable arc contact 12 can be quickly separated, the movable arc contact 12 can be quickly restored to the original state relative to the movable main contact 11, an electric arc can be quickly extinguished when a bus is cut in a circulating current, and burning loss of the electric arc to the stationary arc contact 22 and the movable arc contact 12 is reduced. When the moving arc contact 12 is restored to the original state relative to the moving main contact 11, the moving contact assembly moves continuously to the final opening position along the direction away from the fixed contact assembly, so as to complete the opening operation.

It can be seen that the contact mechanism of the present application can realize the rapid separation of the static arc contact 22 and the moving arc contact 12, improve the separation speed of the static arc contact 22 and the moving arc contact 12, and reduce the time of the static arc contact 22 and the moving arc contact 12 being ablated by the electric arc, thereby reducing the ablation phenomenon of the static arc contact 22 and the moving arc contact 12, avoiding the static arc contact 22 and the moving arc contact 12 being ablated seriously, and solving the problem that the static arc contact and the moving arc contact are ablated seriously by the electric arc due to the large bus switching current in the contact structure of the switch device in the prior art.

The static arc contact 22 and the moving arc contact 12 are ablated by electric arcs, so that the test passing rate is improved, the reliability of the operation condition is improved, and the requirement in the operation condition is met.

In the present embodiment, the moving arc contact 12 has a first through channel 121 for the fixed arc contact 22 to pass through, and the extending direction of the first through channel 121 is parallel to or the same as the preset direction; a first convex part 221 is convexly arranged on the peripheral wall of the contact end of the static arc contact 22, a second convex part 122 is convexly arranged on the inner wall of the first through channel 121, the second convex part 122 is used for abutting against the first convex part 221, and the first convex part 221 and the second convex part 122 form a first matching part 222 and a second matching part 124 respectively; at least a part of the surface body of the contact surface between the second protrusion 122 and the first protrusion 221 is disposed at a predetermined acute angle with the extending direction of the first penetration passage 121, and the predetermined acute angle is disposed toward the movable contact assembly, that is, at least a part of the surface body of the contact surface between the second protrusion 122 and the first protrusion 221 is disposed obliquely with respect to the extending direction of the first penetration passage 121, so that the fixed arc contact 22 penetrates into the first penetration passage 121 or is removed from the first penetration passage 121. A third protrusion 112 is convexly arranged on the inner wall of the second through channel 111, a fourth protrusion 123 is convexly arranged on the outer peripheral wall of the moving arc contact 12, the third protrusion 112 is used for abutting against the fourth protrusion 123, and the third protrusion 112 and the fourth protrusion 123 form a third matching portion 113 and a fourth matching portion 125 respectively.

Specifically, the moving arc contact 12 is a strip-shaped structure, and the extending direction of the moving arc contact 12 is parallel to or the same as the preset direction; the first through channel 121 extends along the extending direction of the moving arc contact 12, and one end of the first through channel 121 extends to the end surface of the moving arc contact 12 facing one end of the fixed contact assembly; that is, along the extending direction of the moving arc contact 12, two ends of the moving arc contact 12 are respectively a first end and a second end, and the direction from the first end to the second end of the moving arc contact 12 is the same as the direction of the moving contact component approaching the static contact component; one end of the first through passage 121 extends to the second end face of the moving arc contact 12.

Specifically, in a direction perpendicular to the preset direction, the outer peripheral wall of the moving arc contact 12 is spaced from the inner wall of the second through passage 111, and the outer peripheral wall of the body section of the moving arc contact 12, which is located on the side of the fourth protrusion 123 close to the fixed contact assembly, is spaced from the protrusion end face of the third protrusion 112, so that the moving arc contact 12 and the moving active contact 11 can move relatively in the preset direction; wherein the third projection 112 has a projecting end in the projecting direction of the third projection 112.

Specifically, the static arcing contact 22 is a strip-shaped structure, and the extending direction of the static arcing contact 22 is parallel to or the same as the preset direction; along the extending direction of the fixed arc contact 22, two ends of the fixed arc contact 22, which are oppositely arranged, are a connecting end and a contact end respectively. Alternatively, the connecting end of the stationary arcing contact 22 is fixedly connected to the stationary main contact 21.

Specifically, the movable main contact 11 is a strip-shaped structure, and the extending direction of the movable main contact 11 is parallel to or the same as the preset direction; the second through channel 111 extends along the extending direction of the movable main contact 11, and one end of the second through channel 111 extends to the end face of the movable arcing contact 12 facing the end of the fixed contact assembly; that is, along the extending direction of the movable main contact 11, two ends of the movable main contact 11 are a first end and a second end, respectively, and the direction from the first end to the second end of the movable main contact 11 is the same as the direction in which the movable contact component approaches the stationary contact component; one end of the second penetration channel 111 extends to the second end face of the movable main contact 11; the outer peripheral wall of the movable main contact 11 is used for contacting with the static main contact 21.

In a specific implementation process, when the contact mechanism is in a closing state, the movable main contact 11 is in contact with the stationary main contact 21 for conducting electricity, a part of the body section of the stationary arc contact 22 along the extension direction thereof is arranged in the first through channel 121 in a penetrating manner, and the second protrusion 122 is in contact with the outer peripheral wall of the stationary arc contact 22 for conducting electricity; at this time, the second protruding portion 122 is located on one side of the first protruding portion 221 close to the connection end of the fixed arc contact 22 along the extending direction of the fixed arc contact 22, and the second protruding portion 122 and the first protruding portion 221 are distributed at intervals (i.e., do not contact) along the extending direction of the first penetration channel 121; at this time, the third protruding portion 112 is located on one side of the fourth protruding portion 123 far away from the elastic element 13 along the extending direction of the second penetrating channel 111, and the third protruding portion 112 and the fourth protruding portion 123 are distributed at intervals (i.e. not in contact) along the extending direction of the second penetrating channel 111; the axial distance between the third protruding portion 112 and the fourth protruding portion 123 is greater than the axial distance between the first protruding portion 221 and the second protruding portion 122, the axial distance between the third protruding portion 112 and the fourth protruding portion 123 is the distance between the third protruding portion 112 and the fourth protruding portion 123 along the extending direction of the second through passage 111, and the axial distance between the first protruding portion 221 and the second protruding portion 122 is the distance between the first protruding portion 221 and the second protruding portion 122 along the extending direction of the first through passage 121.

In the process of opening the contact mechanism, when the moving contact assembly moves to the first opening position, the second protrusion 122 abuts against the first protrusion 221, so that the first protrusion 221 generates a blocking force on the second protrusion 122, that is, the first protrusion 221 generates a blocking force on the moving arc contact 12 to block the moving arc contact 12 from continuing to move in the direction away from the fixed contact assembly, and further, the moving arc contact 12 keeps in contact with the first protrusion 221 through the second protrusion 122, but at this time, the moving main contact 11 continues to move in the direction away from the fixed contact assembly, the elastic member 13 starts to be stretched, and a part of the body of the moving arc contact 12 moves out of the second through channel 111. When the movable contact assembly moves to the second switching position, the third protrusion 112 abuts against the fourth protrusion 123, so that the movable main contact 11 generates a pulling force for pulling the movable arc contact 12 to move in a direction away from the fixed contact assembly to the movable arc contact 12, the pulling force generated by the movable main contact 11 to the movable arc contact 12 is greater than a blocking force generated by the first protrusion 221 to the movable arc contact 12, at least part of a contact surface between the second protrusion 122 and the first protrusion 221 is obliquely arranged relative to an extending direction of the first penetrating channel 121, so that the movable arc contact 12 moves in the direction away from the fixed contact assembly, the first protrusion 221 slides along the second protrusion 122, so that the fixed arc contact 22 moves out of the first penetrating channel 121, and since a certain distance exists between the movable main contact 11 and the fixed main contact 21 in a preset direction at this time, the spring acting force of the elastic member 13 can enable the fixed arc contact 22 and the movable arc contact 12 to be quickly separated, and enable the movable arc contact 12 to quickly recover to the second penetrating channel 12, and the arc contact 12 can be quickly extinguished in an arc-arcing state. After the moving arc contact 12 is restored to the original state of being inserted into the second insertion passage 111, the moving contact assembly moves continuously to the final opening position along the direction away from the static contact assembly, so as to complete the opening operation.

It should be noted that, in the process that the movable contact assembly moves from the first opening position to the second opening position, the movable main contact 11 is completely separated from the stationary main contact 21; therefore, when the opening operation is carried out, the movable main contact 11 and the static main contact 21 are separated firstly, and the static arc contact 22 and the movable arc contact 12 are separated later.

Specifically, each of first projection 221 and second projection 122 is of an annular structure, and each of third projection 112 and fourth projection 123 is of an annular structure.

Specifically, the fixed arc contact 22 and the fixed main contact 21 are connected by a screw, that is, the connection end of the fixed arc contact 22 is connected by a screw with the fixed main contact 21.

In the present embodiment, the elastic member 13 is a spring having a plurality of spring coils arranged in order along the expansion and contraction direction thereof; the movable contact assembly further comprises a first pressure plate 131; the first pressing plate 131 is arranged on the side of the spring ring of the first end of the elastic member 13 far from the moving arcing contact 12 along the expansion and contraction direction of the elastic member 13, i.e. the spring ring of the first end of the elastic member 13 is arranged between the first pressing plate 131 and the moving arcing contact 12; the first fastening member 132 is inserted into the first pressing plate 131 and the moving arcing contact 12, so that the spring ring at the first end of the elastic member 13 is fixedly clamped between the first pressing plate 131 and the moving arcing contact 12, and the first end of the elastic member 13 is fixedly connected to the moving arcing contact 12. Optionally, the first fastener 132 is a bolt or screw.

In this embodiment, the second through channel 111 includes a first channel segment 1111, a second channel segment 1112, and a third channel segment 1113 sequentially arranged along the extending direction thereof; in a direction perpendicular to the extending direction of the second penetration passage 111, the inner wall surface of the second passage segment 1112 is located on one side of the inner wall surface of the first passage segment 1111 close to the central axis of the second penetration passage 111, and the inner wall surface of the second passage segment 1112 is located on one side of the inner wall surface of the third passage segment 1113 close to the central axis of the second penetration passage 111. The first channel section 1111 to the third channel section 1113 face the same direction as the moving contact assembly approaches the stationary contact assembly.

Specifically, the elastic member 13 is disposed in the second through passage 111, and the moving arc contact 12 is disposed in the third passage segment 1113; the movable contact assembly further comprises a positioning plate 14, the positioning plate 14 is arranged in the first channel section 1111, and the second end of the elastic element 13 is fixedly connected with the positioning plate 14; the plate surface of the positioning plate 14 abuts against a stepped surface formed by the first channel section 1111 and the second channel section 1112.

Specifically, the elastic element 13 is a spring, and the moving contact assembly further includes a second pressing plate 133; the second pressing plate 133 is disposed on the side of the spring ring of the second end of the elastic member 13 away from the positioning plate 14 along the expansion and contraction direction of the elastic member 13, i.e., the spring ring of the second end of the elastic member 13 is located between the second pressing plate 133 and the positioning plate 14; the second fastening member 134 is inserted into the second pressing plate 133 and the positioning plate 14, so that the spring ring at the second end of the elastic member 13 is fixedly clamped between the second pressing plate 133 and the positioning plate 14, and the second end of the elastic member 13 is fixedly connected with the positioning plate 14. Optionally, the second fastener 134 is a bolt or screw.

In the present embodiment, the stationary main contact 21 has an accommodating cavity 211 and a preset opening 212 communicating with the accommodating cavity 211, the stationary arcing contact 22 is disposed in the accommodating cavity 211, and the contact end of the stationary arcing contact 22 is located at the preset opening 212; the inner wall surface at the preset opening 212 is used for contacting with the movable main contact 11, that is, the inner wall surface at the preset opening 212 is used for contacting with the outer peripheral wall of the movable main contact 11.

In the present embodiment, the fourth projection 123 is provided at the first end portion of the moving arc contact 12; along the extending direction of the first through channel 121, two ends of the first through channel 121 are a first end and a second end, respectively, and the direction from the first end to the second end of the first through channel 121 is the same as the direction from the first end to the second end of the moving arc contact 12; a second end of the first through channel 121 extends to a second end face of the moving arc contact 12; the second protrusion 122 is disposed at a second end of the first penetration passage 121.

In this embodiment, along the extending direction of the second penetrating channel 111, two ends of the second penetrating channel 111 are a first end and a second end, respectively, and the direction from the first end to the second end of the second penetrating channel 111 is the same as the direction from the first end to the second end of the moving main contact 11, that is, the end of the third channel segment 1113 away from the second channel segment 1112 is the second end of the second penetrating channel 111; the second end of the second through channel 111 extends to the second end face of the movable main contact 11; the third projection 112 is provided at the second end of the second penetration passage 111.

Specifically, when the contact mechanism is in a closing state or an opening state, the second end of the moving arcing contact 12 is located at the second end of the second penetration passage 111.

In this embodiment, the static contact assembly further includes a first spring contact finger 23, the first spring contact finger 23 is disposed on the static main contact 21, and the static main contact 21 is in contact with the moving main contact 11 through the first spring contact finger 23, so as to ensure a contact conductive effect between the static main contact 21 and the moving main contact 11.

Specifically, the first spring contact finger 23 is provided on the inner wall surface at the preset opening 212.

Specifically, a first receiving groove is concavely formed on an inner wall surface of the predetermined opening 212, and a part of the body of the first spring contact finger 23 is fixedly disposed in the first receiving groove.

In this embodiment, the contact mechanism further includes a fixedly disposed conductor portion 40, the conductor portion 40 has a third through channel, an extending direction of the third through channel is the same as the preset direction, the movable main contact 11 is movably through the third through channel along the preset direction, and an inner wall of the third through channel is in contact with an outer peripheral wall of the movable main contact 11 for conducting electricity.

Specifically, the contact mechanism further includes a third spring contact finger 41, the third spring contact finger 41 is disposed on an inner wall surface of the third through passage, and an inner wall of the third through passage is in contact with an outer peripheral wall of the movable main contact 11 through the third spring contact finger 41, so as to ensure a contact conductive effect of the conductor portion 40 and the movable main contact 11.

Specifically, a third accommodating groove is concavely formed on an inner wall surface of the third through passage, and a part of the body of the third spring contact finger 41 is fixedly disposed in the third accommodating groove.

Specifically, the contact mechanism further includes a guide ring 42, and the guide ring 42 is disposed between the movable main contact 11 and the inner wall of the third through channel, that is, the guide ring 42 is sleeved on the movable main contact 11, so that the movable main contact 11 is movably disposed relative to the conductor portion 40.

Specifically, a fifth accommodating groove is concavely formed on the inner wall surface of the third penetrating passage, and a part of the body of the guide ring 42 is fixedly arranged in the fifth accommodating groove.

In this embodiment, the contact mechanism further includes a fixedly disposed shielding cover 50, the shielding cover 50 has a fourth penetrating channel, an extending direction of the fourth penetrating channel is the same as the preset direction, the conductor portion 40 is fixedly penetrated in the fourth penetrating channel, and the movable main contact 11 is movably penetrated in the fourth penetrating channel along the preset direction.

In this embodiment, the movable contact assembly further includes a strap contact finger 16, a fourth accommodating groove is formed in the fourth protrusion 123, a portion of the body of the strap contact finger 16 is fixedly disposed in the fourth accommodating groove, that is, the strap contact finger 16 is movably disposed relative to the movable main contact 11, and the movable arcing contact 12 is in contact with the movable main contact 11 through the strap contact finger 16 for conducting electricity.

In particular, the moving arcing contact 12 is a self-energizing type contact.

The utility model also provides a switchgear, it includes foretell contact mechanism. In particular, the switchgear is a disconnector.

In particular, the contact mechanism of the present application may be applicable to switchgear of various voltage classes; for example, the contact mechanism of the present application is suitable for high voltage switchgear.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model provides an among the contact mechanism, contact mechanism includes the fixed contact subassembly of movable contact subassembly and fixed setting, the movable contact subassembly is including moving main contact 11 and moving arc contact 12, the fixed contact subassembly includes quiet main contact 21 and quiet arc contact 22, the movable contact subassembly is along predetermineeing the orientation movablely setting, so that the movable contact subassembly is close to or keeps away from the fixed contact subassembly, and then make movable contact 11 be close to or keep away from quiet main contact 21, and make movable arc contact 12 be close to or keep away from quiet arc contact 22, thereby make movable contact 11 and quiet main contact 21 contact or separation, and make movable arc contact 12 and quiet arc contact 22 contact or separation.

The movable main contact 11 is provided with a second penetrating channel 111, the extending direction of the second penetrating channel 111 is parallel to or the same as the preset direction, and one end of the second penetrating channel 111 extends to the outer wall surface of the movable main contact 11; the moving arc contact 12 is arranged in the second through channel 111 in a penetrating way; the movable contact assembly further comprises an elastic piece 13, and the elastic piece 13 is arranged in the second penetrating channel 111 and is telescopically arranged along the extending direction of the second penetrating channel 111; the elastic piece 13 is located on one side of the moving arc contact 12, which is far away from the fixed contact assembly, and the first end of the elastic piece 13 is fixedly connected with the moving arc contact 12. The fixed arc contact 22 is provided with a first matching part 222, the moving arc contact 12 is provided with a second matching part 124, so that in the process that the moving contact component is far away from the fixed contact component to be opened, the moving arc contact 12 and the fixed arc contact 22 are relatively fixed through the clamping matching of the first matching part 222 and the second matching part 124, even if the moving arc contact 12 does not move along with the moving main contact 11, and the elastic element 13 is stretched; the inner wall of the second through channel 111 is provided with a third mating portion 113, and the outer peripheral wall of the moving arc contact 12 is provided with a fourth mating portion 125, so that the first mating portion 222 and the second mating portion 124 which are abutted against each other are separated by the clamping and matching of the third mating portion 113 and the fourth mating portion 125, and the moving arc contact 12 is separated from the stationary arc contact 22 under the elastic force of the elastic member 13. According to the above structure, during the opening process, the first engaging portion 222 and the second engaging portion 124 are first abutted and engaged, and then the third engaging portion 113 and the fourth engaging portion 125 are abutted and engaged.

In the process of opening the contact mechanism, the moving contact component moves along a preset direction and in the direction far away from the static contact component, and in the process of opening the contact mechanism, the moving contact component moves along the preset direction and in the direction far away from the static contact component, the moving contact component is provided with a first opening position, a second opening position and a final opening position which are sequentially distributed; when the moving contact assembly moves to the first switching position, the first matching part 222 is abutted with the second matching part 124, so that the abutting fit of the first matching part 222 and the second matching part 124 can block the moving arc contact 12 continuously moving along the direction far away from the fixed contact assembly, and the moving arc contact 12 is kept in contact with the fixed arc contact 22; the movable main contact 11 continues to move along the direction far away from the fixed contact assembly, the movable arcing contact 12 can not move along with the movable main contact 11, the elastic piece 13 starts to be stretched, and part of the body of the movable arcing contact 12 moves out of the second penetrating channel 111. When the movable contact assembly moves to the second switching position, the third matching part 113 and the fourth matching part 125 are abutted; when the moving main contact 11 continues to move in the direction away from the stationary contact assembly, the abutting engagement of the third engaging portion 113 and the fourth engaging portion 125 can separate the first engaging portion 222 and the second engaging portion 124, which are abutted against each other, so that the moving arcing contact 12 can move with the moving main contact 11 and separate from the stationary arcing contact 22, wherein a certain distance is already provided between the moving main contact 11 and the stationary main contact 21 in the preset direction, and the spring action of the elastic member 13 can quickly separate the stationary arcing contact 22 from the moving arcing contact 12, so that the moving arcing contact 12 can quickly recover to the original state relative to the moving main contact 11, and further, the arc can be quickly extinguished when the bus is cut in a circulating current, thereby reducing the burning loss of the arc to the stationary arcing contact 22 and the moving arcing contact 12. When the moving arc contact 12 is restored to the original state relative to the moving main contact 11, the moving contact assembly moves continuously to the final opening position along the direction away from the fixed contact assembly, so as to complete the opening operation.

It can be seen that the contact mechanism of the present application can realize the rapid separation of the static arc contact 22 and the moving arc contact 12, improve the separation speed of the static arc contact 22 and the moving arc contact 12, and reduce the time of the static arc contact 22 and the moving arc contact 12 being ablated by the electric arc, thereby reducing the ablation phenomenon of the static arc contact 22 and the moving arc contact 12, avoiding the static arc contact 22 and the moving arc contact 12 being ablated seriously, and solving the problem that the static arc contact and the moving arc contact are ablated seriously by the electric arc due to the cut-large bus conversion current in the contact structure of the switch device in the prior art.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A contact mechanism comprises a fixed contact component and a movable contact component, wherein the movable contact component is movably arranged along a preset direction to be close to or far away from the fixed contact component; the moving contact component comprises a moving main contact (11) and a moving arc contact (12), and the static contact component comprises a static main contact (21) and a static arc contact (22); it is characterized in that the preparation method is characterized in that,

the movable main contact (11) is provided with a second penetrating channel (111), the extending direction of the second penetrating channel (111) is parallel to or the same as the preset direction, and one end of the second penetrating channel (111) extends to the outer wall surface of the movable main contact (11); the moving arc contact (12) is arranged in the second penetrating channel (111) in a penetrating way;

the moving contact assembly further comprises an elastic piece (13), and the elastic piece (13) is arranged in the second penetrating channel (111) and is telescopically arranged along the extending direction of the second penetrating channel (111); the elastic piece (13) is positioned on one side, away from the fixed contact assembly, of the moving arc contact (12), and the first end of the elastic piece (13) is fixedly connected with the moving arc contact (12);

the static arc contact (22) is provided with a first matching part (222), the moving arc contact (12) is provided with a second matching part (124), and in the process of opening the brake, the moving arc contact (12) does not move along with the moving main contact (11) through the clamping matching of the first matching part (222) and the second matching part (124), and the elastic piece (13) is stretched;

be provided with third cooperation portion (113) on the inner wall of passageway (111) is worn to establish by the second, be provided with fourth cooperation portion (125) on the periphery wall of moving arc contact (12), in order to pass through third cooperation portion (113) with the joint cooperation of fourth cooperation portion (125), make the looks butt first cooperation portion (222) with second cooperation portion (124) separation, and then make moving arc contact (12) be in under the elastic force of elastic component (13) with quiet arc contact (22) separation.

2. Contact arrangement according to claim 1,

the moving arc contact (12) is provided with a first penetrating channel (121) for the static arc contact (22) to penetrate through, and the extending direction of the first penetrating channel (121) is parallel to or the same as the preset direction; a first protruding part (221) is convexly arranged on the outer peripheral wall of the contact end of the static arc contact (22), a second protruding part (122) is convexly arranged on the inner wall of the first penetrating channel (121), the second protruding part (122) is used for being abutted against the first protruding part (221), and the first protruding part (221) and the second protruding part (122) respectively form a first matching part (222) and a second matching part (124); at least part of the surface body of the contact surface between the second protrusion part (122) and the first protrusion part (221) and the extending direction of the first penetrating channel (121) are arranged at a preset acute angle, and the preset acute angle is arranged towards the movable contact assembly, so that the fixed arc contact (22) penetrates into the first penetrating channel (121) or is moved out of the first penetrating channel (121); and/or

The inner wall epirelief that passageway (111) was worn to establish by the second is equipped with third bulge (112), the periphery wall epirelief of moving arc contact (12) is equipped with fourth bulge (123), third bulge (112) be used for with fourth bulge (123) butt, third bulge (112) with fourth bulge (123) form respectively third cooperation portion (113) with fourth cooperation portion (125).

3. Contact arrangement according to claim 2,

the moving arc contact (12) is of a strip-shaped structure, and the extending direction of the moving arc contact (12) is parallel to or the same as the preset direction; one end of the first through channel (121) extends to the end face of the movable arc contact (12) facing one end of the fixed contact assembly; and/or

The static arc contact (22) is of a strip-shaped structure, and the extension direction of the static arc contact (22) is parallel to or the same as the preset direction; and/or

The movable main contact (11) is of a strip-shaped structure, and the extending direction of the movable main contact (11) is parallel to or the same as the preset direction; one end of the second through channel (111) extends to the end face of one end of the movable arc contact (12) facing the fixed contact assembly; the peripheral wall of the movable main contact (11) is used for being in contact with the static main contact (21); and/or

The static main contact (21) is provided with an accommodating cavity (211) and a preset opening (212) communicated with the accommodating cavity (211), the static arc contact (22) is arranged in the accommodating cavity (211), and the contact end of the static arc contact (22) is positioned at the preset opening (212); the inner wall surface at the preset opening (212) is used for being in contact with the movable main contact (11).

4. Contact arrangement according to claim 2, characterized in that, when the contact arrangement is in a closed state,

the movable main contact (11) is in contact with the static main contact (21) for conducting electricity;

part of the body of the static arc contact (22) is arranged in the first penetrating channel (121) in a penetrating manner, the second protruding part (122) and the first protruding part (221) are distributed at intervals along the extending direction of the first penetrating channel (121), and the second protruding part (122) is in contact with the outer peripheral wall of the static arc contact (22) for conducting electricity;

the third protruding part (112) is located on one side, far away from the elastic part (13), of the fourth protruding part (123) along the extending direction of the second penetrating channel (111), and the third protruding part (112) and the fourth protruding part (123) are distributed at intervals along the extending direction of the second penetrating channel (111);

wherein an axial spacing between the third projection (112) and the fourth projection (123) is greater than an axial spacing between the first projection (221) and the second projection (122).

5. Contact arrangement according to claim 4,

the static contact assembly further comprises a first spring contact finger (23), the first spring contact finger (23) is arranged on the static main contact (21), and the static main contact (21) is in contact with the movable main contact (11) through the first spring contact finger (23).

6. Contact means in accordance with claim 2, characterized in that the second through channel (111) comprises a first channel section (1111), a second channel section (1112) and a third channel section (1113) arranged in succession along its extension; in a direction perpendicular to an extending direction of the second penetration channel (111), an inner wall surface of the second channel segment (1112) is located on a side of an inner wall surface of the first channel segment (1111) close to a central axis of the second penetration channel (111), and an inner wall surface of the second channel segment (1112) is located on a side of an inner wall surface of the third channel segment (1113) close to the central axis of the second penetration channel (111); the elastic piece (13) is arranged in the second penetrating channel (111), and the moving arc contact (12) penetrates through the third channel segment (1113); the moving contact subassembly still includes:

the positioning plate (14), the positioning plate (14) is arranged in the first channel section (1111), and the second end of the elastic piece (13) is fixedly connected with the positioning plate (14); the plate surface of the positioning plate (14) is abutted against the step surface formed by the first channel section (1111) and the second channel section (1112).

7. The contact mechanism as recited in claim 3, further comprising:

the conductive part (40) is fixedly arranged, the conductive part (40) is provided with a third penetrating channel, the movable main contact (11) is movably arranged in the third penetrating channel in a penetrating mode, and the inner wall of the third penetrating channel is in contact with the outer peripheral wall of the movable main contact (11) for conducting electricity.

8. The contact mechanism of claim 7, further comprising:

the third spring contact finger (41), the third spring contact finger (41) is arranged on the inner wall surface of the third penetrating channel, and the inner wall of the third penetrating channel is contacted with the outer peripheral wall of the movable main contact (11) through the third spring contact finger (41); and/or

A guide ring (42), wherein the guide ring (42) is arranged between the movable main contact (11) and the inner wall of the third through channel so that the movable main contact (11) is movably arranged relative to the conductor part (40); and/or

The shielding cover (50) is fixedly arranged, the shielding cover (50) is provided with a fourth penetrating channel, the conductor part (40) is fixedly arranged in the fourth penetrating channel in a penetrating mode, and the movable main contact (11) is movably arranged in the fourth penetrating channel in a penetrating mode.

9. The contact mechanism of claim 2, wherein the movable contact assembly further comprises:

the watch strap contact finger (16), a fourth containing groove is formed in the fourth protruding portion (123), a part of the body of the watch strap contact finger (16) is fixedly arranged in the fourth containing groove, and the movable arc contact (12) is in contact conduction with the movable main contact (11) through the watch strap contact finger (16).

10. A switchgear device, characterized in that it comprises a contact arrangement according to any of claims 1 to 9.

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