CN220171944U - Moving contact assembly and isolating switch - Google Patents

Abstract

The utility model provides a moving contact subassembly and isolator, isolator includes the moving contact subassembly, the moving contact subassembly includes moving contact and contact support, the contact support is equipped with the mounting hole that runs through, and the moving contact cartridge is in the mounting hole, be equipped with on the contact support and keep off the arc spare, the moving contact includes the contact plate and the slide that is connected with the contact plate, slide and mounting hole sliding fit, keep off the arc spare and be equipped with and be used for shielding mounting hole one end open-ended shielding structure, be equipped with on shielding structure and dodge the hole, contact plate one end is passed and is dodged the hole and stretch out the mounting hole, the mounting hole is kept away from the opening inboard of the one end that keeps off the arc spare is equipped with buckle structure, the slide can be followed the one end that is equipped with buckle structure and is inserted in the mounting hole to be blocked in the mounting hole by buckle structure, the moving contact installation of can be convenient for.

Description

Moving contact assembly and isolating switch

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a moving contact assembly and an isolating switch.

Background

In order to meet the increasing customer demands of the conventional isolating switch, the conductive loop is improved to be in soft connection, so that the assembly difficulty is high, if the conductive sheet is connected with the wiring board through the soft connection copper wire, the integrated conductive sheet, the soft connection copper wire and the wiring board are difficult to be installed into the contact support, and if the conductive sheet is installed into the contact support and then welded with the soft connection copper wire, the installation and welding difficulty is high, and the conductive sheet needs to be long enough to extend out of the contact support for welding. When the switch is closed and opened, the contact support in the isolation chamber drives the contact to rotate, and as one end of the conducting strip is in soft connection, the degree of freedom of the conducting strip can be limited only by the contact support, so that the reliability is poor, and the assembly difficulty is high.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provides a moving contact assembly isolating switch.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a moving contact assembly, includes moving contact and contact support, the contact support is equipped with the mounting hole that runs through, and the moving contact cartridge is in the mounting hole, be equipped with on the contact support and keep off the arc spare, the moving contact includes the contact plate and is connected with the contact plate's slide, slide and mounting hole sliding fit, it is equipped with and is used for sheltering from mounting hole one end open-ended shielding structure to keep off the arc spare, is equipped with on shielding structure and dodges the hole, and contact plate one end passes dodges the hole and stretches out outside the mounting hole, the mounting hole is kept away from the opening inboard of the one end that keeps off the arc spare is equipped with buckle structure, the slide can be followed the one end that is equipped with buckle structure and is inserted in the mounting hole to blocked in the mounting hole by buckle structure.

Preferably, the moving contact comprises two contact plates which are oppositely arranged, and two clamping plates which are arranged on the outer sides of the side surfaces of the two contact plates, a contact space for inserting the fixed contact is formed between the two contact plates, the sliding plates are arranged on the clamping plates, and the sliding plates are arranged corresponding to the side edges of the contact plates.

Preferably, the mounting hole comprises two sliding surfaces which are oppositely arranged, and second sliding surfaces which are respectively connected between the two sliding surfaces, wherein the buckle structure is arranged on at least one sliding surface.

Preferably, two sliding plates are respectively arranged on each clamping plate, the two sliding plates on each clamping plate are oppositely arranged on the side faces of the two sides of the contact plate, the clamping structure is matched with the two sliding plates on the same side of the two clamping plates of the moving contact, and the two sliding plates on the side, away from the clamping structure, of the two clamping plates of the moving contact are respectively matched with the other sliding surface.

Preferably, the size that the mounting hole is close to buckle structure one end is greater than the size that is close to fender arc piece one end, buckle structure is equipped with the elastic plate and gives way the slide with deformation, be equipped with the groove of giving way of dodging elastic plate deformation in the mounting hole.

Preferably, the sliding surface is provided with a yielding groove for accommodating the buckle structure, the yielding groove is provided with a yielding surface which is opposite to the other sliding surface, the buckle structure comprises an elastic plate and a limiting claw arranged on the elastic plate, the elastic plate is arranged at intervals with the yielding surface, the elastic plate is provided with a limiting surface which is opposite to the other sliding surface, the opposite limiting surface and the sliding surface are respectively limited to the moving contact from a first direction, and the limiting claw is provided with a buckle surface.

Preferably, the movable contact comprises at least two groups of movable contacts, the at least two groups of movable contacts are connected through a first shaft, the mounting hole is provided with a step surface for limiting the first shaft, the step surface and the clamping surface limit the movable contacts from a second direction respectively, and the first direction and the second direction are orthogonally arranged.

Preferably, a limiting plate extending between the at least two groups of moving contacts is arranged in the mounting hole, supporting plates are respectively arranged between the at least two groups of moving contacts, the supporting plates are sleeved on the first shaft, and the thickness of the limiting plate is smaller than that of the supporting plates.

Preferably, at least one of the clamping plates is provided with an elastic piece on the outer side, the elastic piece is used for pushing the clamping plates to push the contact plates, the elastic piece in each group of moving contacts, the two contact plates and the two clamping plates are connected through a second shaft, and a limiting piece is arranged between the two contact plates.

Preferably, the shielding structure comprises two first side plates which are oppositely arranged, and a second side plate which is respectively connected between the two first side plates, wherein the first side plates and the second side plates are connected through a top plate, the avoidance holes are formed in the top plate, and a blocking surface is arranged on the top plate.

Preferably, a second shielding structure is arranged on one side of the shielding structure, and when the contact support drives the moving contact to leave the fixed contact, the second shielding structure can be driven to move between the fixed contact and the contact support.

Preferably, the arc blocking piece is provided with a first claw and a second claw, a first clamping block matched with the first claw is arranged in the mounting hole, a second clamping block matched with the second claw is arranged on the contact support, a mounting groove is arranged on the side face of the second clamping block, the length direction of the mounting groove is parallel to the axis supported by the contact, and the second claw can drive the first claw to be limited with the second clamping block when being inserted into the mounting groove to be limited with the second clamping block.

Preferably, one end of the contact plate, which is close to the fastening structure, is connected with the movable wiring board through flexible connection, and one end of the contact plate, which is close to the fastening structure, is positioned in the mounting hole.

According to the moving contact assembly, the clamping structure is arranged in the mounting hole, so that the sliding plate can be inserted into the mounting hole from the clamping structure, the moving contact can be prevented from being inserted from one end of the mounting hole, which is provided with the arc blocking piece, interference with the arc blocking piece can be avoided, and the moving contact can be conveniently mounted, for example, the moving contact and the flexible connection are integrated, and then the moving contact and the flexible connection are mounted in the mounting hole together.

In addition, be equipped with in the mounting hole and stretch to limiting plate between two at least groups moving contact, this embodiment is equipped with the limiting plate respectively at two second sliding surfaces of mounting hole, and two limiting plates stretch to between two groups moving contact respectively, and two limiting plates can play the effect of spacing moving contact, are favorable to spacing flexibly connected's position simultaneously.

The utility model also provides an isolating switch which comprises the movable contact assembly.

Preferably, the movable contact assembly comprises a shell, a movable wiring board and a static wiring board, wherein the movable wiring board and the static wiring board are respectively arranged at two ends of the shell, a contact support of the movable contact assembly is rotatably arranged in the shell, a movable contact of the movable contact assembly is arranged on the contact support and is connected with the movable wiring board through flexible connection, a radiating fin is arranged on the side face of the movable wiring board, the static contact is connected with the static wiring board, and an arc extinguishing grid sheet is arranged on the side face of the static contact.

The isolating switch has the characteristic of convenient assembly.

Drawings

FIG. 1 is a state diagram of the disconnecting switch of the present utility model;

FIG. 2 is a closing state diagram of the isolating switch of the present utility model;

FIG. 3 is a schematic diagram of the cooperation of the moving contact and the fixed contact of the present utility model;

FIG. 4 is a schematic view of the structure of the moving contact of the present utility model;

fig. 5 is an exploded view of the moving contact of the present utility model;

FIG. 6 is a cross-sectional view of a contact support of the present utility model;

FIG. 7 is a schematic diagram of the mating of the contact support and moving contact of the present utility model;

FIG. 8 is a schematic view of the structure of the contact support of the present utility model;

FIG. 9 is a schematic view of the mating of the contact support and arc stop of the present utility model;

FIG. 10 is a schematic view of the structure of the arc baffle of the present utility model;

in the figure, 1, a moving contact; 2. a stationary contact; 3. a contact support; 30. a mounting hole; 11. a slide plate; 12. a contact plate; 41. a shielding structure; 40. avoidance holes; 5. a buckle structure; 6. a housing; 61. a movable wiring board; 62. a static wiring board; 63. soft connection; 64. a heat sink; 65. arc extinguishing grid plates; 101. a first shaft; 13. a clamping plate; 14. a spring plate; 102. a second shaft; 15. a sleeve; 16. a limiting block; 31. a sliding surface; 32. a second sliding surface; 33. a relief groove; 34. a yielding surface; 51. an elastic plate; 52. a limit claw; 53. a limiting surface; 54. a snap face; 35. a limiting plate; 10. a support plate; 42. a second shielding structure; 43. a first side plate; 44. a second side plate; 45. a top plate; 46. a blocking surface; 47. a first claw; 48. a second claw; 470. a first clamping block; 480. a second clamping block; 481. a mounting groove; 36. a step surface.

Detailed Description

Specific embodiments of the disconnector according to the utility model are further described below with reference to the examples given in the accompanying drawings. The isolating switch of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-5, the isolating switch of the utility model comprises a moving contact assembly and a fixed contact 2, wherein the moving contact assembly comprises a moving contact 1 and a contact support 3, the moving contact 1 is arranged on the contact support 3, the contact support 3 is used for driving a contact plate 12 of the moving contact 1 to contact and separate from the fixed contact 2, the contact support 3 is provided with a through mounting hole 30, the moving contact 1 is inserted into the mounting hole 30, the contact support 3 is provided with an arc blocking piece, the moving contact 1 comprises a contact plate 12 and a sliding plate 11 connected with the contact plate 12, the sliding plate 11 is in sliding fit with the mounting hole 30, the arc blocking piece is provided with a blocking structure 41 for blocking an opening at one end of the mounting hole 30, an avoiding hole 40 is arranged on the blocking structure 41, one end of the contact plate 12 passes through the avoiding hole 40 to extend out of the mounting hole 30, the inner side of the opening at one end of the arc blocking piece is provided with a fastening structure 5, and the sliding plate 11 can be inserted into the mounting hole 30 from one end provided with the fastening structure 5 and blocked in the mounting hole 30 by the fastening structure 5.

According to the moving contact assembly, the clamping structure 5 is arranged in the mounting hole 30, so that the sliding plate 11 can be inserted into the mounting hole 30 from the clamping structure 5, the moving contact 1 can be prevented from being inserted from one end of the mounting hole 30, which is provided with the arc blocking piece, interference with the arc blocking piece can be avoided, and the moving contact 1 can be conveniently mounted, for example, the moving contact 1 and the flexible connection are integrated, and then the moving contact 1 and the flexible connection are mounted in the mounting hole 30 together.

As shown in fig. 1-2, the isolating switch of the utility model comprises a shell 6, a movable wiring board 61, a fixed wiring board 62, a movable contact assembly and a fixed contact 2 which are respectively arranged at two ends of the shell 6, wherein the movable contact assembly comprises a contact support 3 and a movable contact 1, the contact support 3 is rotatably arranged in the shell 6, the movable contact 1 is arranged on the contact support 3 and is connected with the movable wiring board 61 through a flexible connection 63, a radiating fin 64 is arranged at the side surface of the movable wiring board 61, the fixed contact 2 is connected with the fixed wiring board 62, and a plurality of arc extinguishing grid pieces 65 are arranged at the side surface of the fixed contact 2.

The isolating switch has the characteristic of convenient assembly.

As shown in fig. 3-4, the moving contact assembly of the present embodiment includes at least two groups of moving contacts 1, at least two groups of moving contacts 1 are connected by a first shaft 101, the present embodiment is provided with two groups of moving contacts 1, the two groups of moving contacts 1 are stacked, each group of moving contacts 1 includes two contact plates 12 that are oppositely disposed, and two clamping plates 13 that are disposed outside the sides of the two contact plates 12, a contact space for inserting the fixed contact 2 is formed between the two contact plates 12, the fixed contact 2 can be inserted into the contact space between the two contact plates 12, the clamping plates 13 are used for pushing the contact plates 12 to compress the sides of the fixed contact 2, the clamping plates 13 are provided with sliding plates 11, the sliding plates 11 are disposed corresponding to the sides of the contact plates 12, in the present embodiment, each clamping plate 13 is provided with two sliding plates 11, and the two sliding plates 11 on each clamping plate 13 are oppositely disposed on the sides of the two sides of the contact plates 12. The sliding plate 11 of the moving contact 1 of the embodiment is arranged on the clamping plate 13 and is arranged separately from the contact plate 12, so that different materials are convenient to use, and the cost can be reduced on the basis of being convenient for improving the machining precision of the sliding plate 11. Of course, as another embodiment, the slide plate 11 may be integrally formed with the contact plate 12.

Further, at least one of the clamping plates 13 is provided with a spring plate 14 on the outer side, the spring plate 14 is used for pushing the clamping plates 13 to push the contact plates 12, the spring plate 14, the two contact plates 12 and the two clamping plates 13 in each group of moving contacts 1 are connected through the second shaft 102, a limiting piece is arranged between the two contact plates 12, in this embodiment, the limiting piece is a sleeve 15 and a limiting block 16, a sleeve 15 and/or a limiting block 16 are arranged between the two contact plates 12, the sleeve 15 is sleeved on the second shaft 102, in this embodiment, one spring plate 14 is arranged on the side, far away from the other moving contact 1, of each group of moving contacts 1, the spring plate 14 pushes the clamping plates 13 and the contact plates 12 to move along the second shaft 102 to clamp the fixed contact 2, and when the fixed contact 2 is inserted into the contact space, the fixed contact 2 can also prop up the contact space, and push the contact plates 12 to move reversely to deform the spring plate 14.

As shown in fig. 6 and 8, the mounting hole 30 includes two sliding surfaces 31 disposed opposite to each other, and a second sliding surface 32 respectively connected between the two sliding surfaces 31, wherein the fastening structure 5 is disposed on at least one sliding surface 31. Preferably, the fastening structure 5 is matched with two sliding plates 11 on the same side of two clamping plates 13 in each group of moving contacts 1, two sliding plates 11 on one side of the two clamping plates 13 far away from the fastening structure 5 in each group of moving contacts 1 are respectively matched with another sliding surface 31, and the fastening structure 5 is only arranged on one side of the mounting hole 30, so that the device has the characteristics of simple structure, compact volume and high reliability.

Preferably, one end of the moving contact 1 is matched with the fixed contact 2, the other end is connected with the moving wiring board 61 through the flexible connection 63, and in order to improve the assembly efficiency, the moving contact is welded with the flexible connection 63 and the moving wiring board 61 when being assembled, and then is inserted into the contact support 3 for internal fixation, and one end of the moving contact 1 matched with the fixed contact 2 penetrates through the arc blocking piece. Because the flexible connection 63 and the movable wiring board 61 are welded on the movable contact 1, the movable wiring board 61 is inconvenient to assemble at the end, that is, the mounting hole 30 of the contact support 3 is inconvenient to insert near one end of the arc blocking piece, preferably from one end provided with the buckle structure 5, the size of the mounting hole 30 near one end of the buckle structure 5 is larger than that near one end of the arc blocking piece, the buckle structure 5 is provided with the elastic plate 51 to deform the yielding slide plate 11, and the yielding groove 33 for avoiding deformation of the elastic plate 51 is formed in the mounting hole 30 near one end of the buckle structure 5. One end of the contact plate 12, which is close to the fastening structure 5, is connected with the movable wiring board 61 through a flexible connection 63, and one end of the contact plate 12, which is close to the fastening structure 5, is located in the mounting hole 30.

Specifically, the sliding surface 31 is provided with a yielding groove 33 for accommodating the fastening structure 5, the yielding groove 33 is provided with a yielding surface 34 opposite to the other sliding surface 31, the fastening structure 5 comprises an elastic plate 51 and a limiting claw 52 arranged on the elastic plate 51, the elastic plate 51 and the yielding surface 34 are arranged at intervals, the elastic plate 51 is provided with a limiting surface 53 opposite to the other sliding surface 31, the opposite limiting surface 53 and the sliding surface 31 are respectively used for limiting the moving contact 1 from a first direction, the limiting claw 52 is provided with a fastening surface 54, the mounting hole 30 is provided with a step surface 36 for limiting the first shaft 101, the step surface 36 and the fastening surface 54 are respectively used for limiting the moving contact 1 from a second direction, and the first direction and the second direction are orthogonally arranged.

As shown in fig. 7-8, the mounting hole 30 is provided with a limiting plate 35 extending between the at least two groups of moving contacts 1, in this embodiment, two second sliding surfaces 32 of the mounting hole 30 are respectively provided with a limiting plate 35, two limiting plates 35 extend between the two groups of moving contacts 1 respectively, and the two limiting plates 35 can play a role in limiting the moving contacts 1.

Further, as shown in fig. 10, the support plates 10 are respectively disposed between the at least two groups of moving contacts 1, in this embodiment, only one support plate 10 is disposed between the two groups of moving contacts 1, the support plate 10 is sleeved on the first shaft 101, the thickness of the limiting plate 35 is smaller than that of the support plate 10, the support plate 10 can limit the distance between the two moving contacts 1, and the effect of the limiting plate 35 on limiting the moving contacts 1 is not disabled.

As shown in fig. 6, the arc blocking member includes a second shielding structure 42 disposed at one side of the shielding structure 41, and when the contact support 3 drives the moving contact 1 to leave the fixed contact 2, the second shielding structure 42 can be driven to move between the fixed contact 2 and the contact support 3.

Further, as shown in fig. 10, the shielding structure 41 includes two first side plates 43 disposed opposite to each other, and a second side plate 44 connected between the two first side plates 43, where the first side plates 43 and the second side plates 44 are connected by a top plate 45, the shielding hole 40 is disposed on the top plate 45, and a blocking surface 46 is disposed on the top plate 45.

In this embodiment, the arc blocking piece and the contact support 3 are separately arranged and fastened, and the arc blocking piece can be made of heat-resistant materials. The moving contact 1 can also be installed from the end provided with the arc blocking piece. Of course, the arc stop may also be integrally formed with the contact support 3.

Further, the arc blocking piece is provided with a first claw 47 and a second claw 48, a first clamping block 470 matched with the first claw 47 is arranged in the mounting hole 30, a second clamping block 480 matched with the second claw 48 is arranged on the contact support 3, a mounting groove 481 is formed in the side face of the second clamping block 480, the length direction of the mounting groove 481 is parallel to the axis of the contact support 3, the first claw 47 is inserted into the mounting hole 30 and located on the side face of the first clamping block 470 during assembly, and the second claw 48 is inserted into the mounting groove 481 to drive the first claw 47 to limit the second clamping block 480 when moving along the axis of the head support 3 and limiting the second clamping block 480.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (15)

1. The utility model provides a moving contact subassembly, includes moving contact (1) and contact support (3), contact support (3) are equipped with mounting hole (30) that run through, moving contact (1) cartridge in mounting hole (30), be equipped with on contact support (3) and keep off arc piece, its characterized in that: moving contact (1) include contact plate (12) and slide (11) be connected with contact plate (12), slide (11) and mounting hole (30) sliding fit, keep off arc spare and be equipped with be used for sheltering from mounting hole (30) one end open-ended shielding structure (41), be equipped with on shielding structure (41) and dodge hole (40), contact plate (12) one end is passed and is dodged hole (40) and stretch out outside mounting hole (30), mounting hole (30) are kept away from the opening inboard of the one end of keeping off arc spare is equipped with buckle structure (5), slide (11) can insert mounting hole (30) from the one end that is equipped with buckle structure (5) to blocked in mounting hole (30) by buckle structure (5).

2. The moving contact assembly of claim 1, wherein: the movable contact (1) comprises two contact plates (12) which are oppositely arranged, and two clamping plates (13) which are arranged on the outer sides of the side surfaces of the two contact plates (12), a contact space for the insertion of the fixed contact (2) is formed between the two contact plates (12), the sliding plate (11) is arranged on the clamping plates (13), and the sliding plate (11) is arranged corresponding to the side edges of the contact plates (12).

3. The moving contact assembly of claim 2, wherein: the mounting hole (30) comprises two sliding surfaces (31) which are oppositely arranged, and second sliding surfaces (32) which are respectively connected between the two sliding surfaces (31), wherein at least one sliding surface (31) is provided with the fastening structure (5).

4. A moving contact assembly according to claim 3, wherein: two sliding plates (11) are respectively arranged on each clamping plate (13), the two sliding plates (11) on each clamping plate (13) are oppositely arranged on the side faces of the two sides of the contact plate (12), the clamping structure (5) is matched with the two sliding plates (11) on the same side of the two clamping plates (13) of the moving contact (1), and the two sliding plates (11) on the side, away from the clamping structure (5), of the two clamping plates (13) of the moving contact (1) are respectively matched with the other sliding surface (31).

5. A moving contact assembly according to claim 3, wherein: the size that mounting hole (30) is close to buckle structure (5) one end is greater than the size that is close to fender arc piece one end, buckle structure (5) are equipped with elastic plate (51) and give way slide (11) with deformation, be equipped with in mounting hole (30) and dodge groove (33) that elastic plate (51) were deformed.

6. The movable contact assembly of claim 5, wherein: the sliding surface (31) is provided with a yielding groove (33) for accommodating the clamping structure (5), the yielding groove (33) is provided with a yielding surface (34) which is arranged opposite to the other sliding surface (31), the clamping structure (5) comprises an elastic plate (51) and a limiting claw (52) which is arranged on the elastic plate (51), the elastic plate (51) is arranged at intervals with the yielding surface (34), the elastic plate (51) is provided with a limiting surface (53) which is arranged opposite to the other sliding surface (31), the limiting surface (53) and the sliding surface (31) which are arranged opposite to each other limit the moving contact (1) from the first direction, and the limiting claw (52) is provided with a clamping surface (54).

7. The movable contact assembly of claim 6, wherein: the movable contact comprises at least two groups of movable contacts (1), wherein the at least two groups of movable contacts (1) are connected through a first shaft (101), a step surface (36) for limiting the first shaft (101) is arranged in the mounting hole (30), the step surface (36) and the clamping surface (54) limit the movable contacts (1) from a second direction respectively, and the first direction and the second direction are orthogonally arranged.

8. The movable contact assembly of claim 7, wherein: the mounting hole (30) is internally provided with a limiting plate (35) extending between the at least two groups of moving contacts (1), a supporting plate (10) is respectively arranged between the at least two groups of moving contacts (1), the supporting plate (10) is sleeved on the first shaft (101), and the thickness of the limiting plate (35) is smaller than that of the supporting plate (10).

9. The moving contact assembly of claim 2, wherein: at least one clamping plate (13) outside is equipped with shell fragment (14), and shell fragment (14) are used for promoting clamping plate (13) promote contact plate (12), and shell fragment (14), two contact plate (12) and two clamping plates (13) in every group moving contact (1) link to each other through second axle (102), are equipped with the locating part between two contact plate (12).

10. The moving contact assembly of claim 1, wherein: the shielding structure (41) comprises two first side plates (43) which are oppositely arranged, and second side plates (44) which are respectively connected between the two first side plates (43), wherein the first side plates (43) and the second side plates (44) are connected through a top plate (45), the avoidance holes (40) are formed in the top plate (45), and blocking surfaces (46) are formed in the top plate (45).

11. The moving contact assembly of claim 1, wherein: and a second shielding structure (42) is arranged on one side of the shielding structure (41), and the contact support (3) can drive the second shielding structure (42) to move between the fixed contact (2) and the contact support (3) when the moving contact (1) is driven to leave the fixed contact (2).

12. The movable contact assembly of claim 11, wherein: the arc blocking piece is provided with a first clamping jaw (47) and a second clamping jaw (48), a first clamping block (470) matched with the first clamping jaw (47) is arranged in the mounting hole (30), a second clamping block (480) matched with the second clamping jaw (48) is arranged on the contact support (3), a mounting groove (481) is formed in the side face of the second clamping block (480) of the contact support (3), the length direction of the mounting groove (481) is parallel to the axis of the contact support (3), and the second clamping jaw (48) can drive the first clamping jaw (47) to be limited with the second clamping block (480) when being inserted into the mounting groove (481) to be limited with the second clamping block (480).

13. The movable contact assembly of claim 5, wherein: one end of the contact plate (12) close to the buckle structure (5) is connected with the movable wiring board (61) through a flexible connection (63), and one end of the contact plate (12) close to the buckle structure (5) is located in the mounting hole (30).

14. An isolating switch, characterized in that: comprising a moving contact assembly according to any one of claims 1-13.

15. The disconnector according to claim 14, in which: including casing (6) and install respectively at moving wiring board (61) and quiet wiring board (62) at casing (6) both ends, moving contact assembly's contact support (3) rotate install in casing (6), moving contact assembly's moving contact (1) install on contact support (3) and through flexible coupling (63) with moving wiring board (61) are connected, are equipped with fin (64) in moving wiring board (61) side, quiet contact (2) with quiet wiring board (62) are connected, are equipped with arc extinguishing bars piece (65) in quiet contact (2) side.