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 assemblies and isolating switches

Technical field

The utility model relates to the field of low-voltage electrical appliances, in particular to a moving contact assembly and an isolating switch.

Background technique

In order to meet the increasing customer demand, the existing isolation switch has a need to improve the conductive circuit to use soft connections, which makes assembly more difficult. If the conductive sheet is first connected to the wiring board through soft-connected copper wires, the integrated conductive sheet, It is difficult to install the soft-connected copper wire and wiring board into the contact support. If the conductive sheet is installed into the contact support first and then welded to the soft-connected copper wire, it is not only difficult to install and weld, but also the conductive sheet needs to be long enough to Extends beyond the contact support for welding. When closing and opening, the contact support in the isolation chamber drives the contact to rotate. Since one end of the conductive sheet is a soft connection, the degree of freedom of the conductive sheet can only be limited by the contact support, which not only results in poor reliability, but also makes assembly more difficult. .

Contents of the invention

The purpose of this utility model is to overcome at least one defect of the prior art and provide a moving contact assembly isolating switch.

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

A movable contact assembly, including a movable contact and a contact support. The contact support is provided with a through-mounting hole. The movable contact is inserted into the installation hole. The contact support is provided with an arc barrier. The movable contact includes a contact plate and a sliding plate connected to the contact plate. The sliding plate is slidably matched with the mounting hole. The arc blocking piece is provided with a shielding structure for shielding the opening at one end of the mounting hole, and an avoidance hole is provided on the shielding structure. , one end of the contact plate passes through the avoidance hole and extends out of the installation hole. A buckle structure is provided inside the opening of the end of the installation hole away from the arc-blocking member. The slide plate can be inserted into the installation hole from the end provided with the buckle structure. hole and is blocked in the mounting hole by the buckle structure.

Preferably, the movable contact includes two contact plates arranged opposite each other, and two clamping plates arranged outside the sides of the two contact plates, and a contact space for the insertion of the static contact is formed between the two contact plates. The sliding plate is provided on the plywood, and the sliding plate is arranged corresponding to the side of the contact plate.

Preferably, the mounting hole includes two sliding surfaces arranged opposite each other, and second sliding surfaces respectively connected between the two sliding surfaces, wherein at least one sliding surface is provided with the buckle structure.

Preferably, two sliding plates are provided on each plywood, and the two sliding plates on each plying plate are arranged oppositely on the two sides of the contact plate. The buckle structure and the two plying plates of the movable contact The two sliding plates on the same side cooperate with each other, and the two clamping plates of the movable contact on the side away from the buckle structure cooperate with the other sliding surface respectively.

Preferably, the size of the end of the mounting hole close to the buckle structure is larger than the size of the end close to the arc blocking piece. The buckle structure is provided with an elastic plate to deform the sliding plate, and the installation hole is provided with a spring plate to avoid deformation of the elastic plate. Give way to the slot.

Preferably, the sliding surface is provided with a relief groove for accommodating the buckle structure, and the relief groove is provided with a relief surface opposite to the other sliding surface. The buckle structure includes an elastic plate and a The limiting claw is on the elastic plate. The elastic plate is spaced apart from the giving surface. The elastic plate is provided with a limiting surface opposite to another sliding surface. The opposite limiting surface and sliding surface are respectively The movable contact is limited from the first direction, and the limiting claw is provided with a snap surface.

Preferably, it includes at least two sets of movable contacts, the at least two sets of movable contacts are connected through a first shaft, the mounting hole is provided with a stepped surface for limiting the first shaft, and the stepped surface and the said The buckling surfaces respectively limit the position of the movable contact from the second direction, and the first direction and the second direction are arranged orthogonally.

Preferably, the mounting hole is provided with a limiting plate extending between the at least two sets of movable contacts, a support plate is provided between the at least two sets of movable contacts, and the support plate is sleeved on the On the first axis, the thickness of the limiting plate is smaller than the thickness of the supporting plate.

Preferably, there is a spring piece on the outside of at least one of the clamping plates. The spring piece is used to push the clamping plate to push the contact plate. The spring piece, two contact plates and two clamping plates in each set of movable contacts are connected through a second shaft. Limiting parts are provided between the contact plates.

Preferably, the shielding structure includes two first side plates arranged opposite each other, and a second side plate respectively connected between the two first side plates, and the first side plate and the second side plate are connected through a top plate. , the escape hole is provided on the top plate, and the top plate is provided with a blocking surface.

Preferably, a second shielding structure is provided on one side of the shielding structure. When the contact support drives the moving contact away from the static contact, it can drive the second shielding structure to move between the static contact and the contact support.

Preferably, the arc blocking member is provided with a first claw and a second claw, the mounting hole is provided with a first blocking block that cooperates with the first claw, and the contact support is provided with a second claw The second clamping block is matched with the claws, and the contact support is provided with a mounting slot on the side of the second clamping block. The length direction of the mounting slot is parallel to the axis of the contact support. The second claw is inserted into the mounting slot and is in contact with the second clamping block. When the second clamping block is limited, it can drive the first claw and the second clamping block to limit the position.

Preferably, the end of the contact plate close to the buckle structure is connected to the movable terminal board through a soft connection, and the end of the contact plate close to the buckle structure is located in the installation hole.

In the movable contact assembly of the present invention, a buckle structure is provided in the installation hole, so that the slide plate can be inserted into the installation hole from the buckle structure, and the movable contact can be avoided from being inserted from the end of the installation hole with an arc blocking piece. Not only can it avoid interference with the arc baffle, but it can also facilitate the installation of the movable contact. For example, the movable contact and the soft connection can be integrated into one and then installed together into the installation hole.

In addition, the mounting hole is provided with a limiting plate extending between the at least two sets of movable contacts. In this embodiment, limiting plates are respectively provided on the two second sliding surfaces of the mounting hole. Two limiting plates Respectively extending between the two sets of movable contacts, the two limiting plates can play the role of limiting the movable contacts, and at the same time are beneficial to limiting the position of the soft connection.

The utility model also provides an isolation switch, which includes the movable contact assembly.

Preferably, it includes a housing and a movable terminal block and a static terminal block respectively installed at both ends of the housing. The contact support of the movable contact assembly is rotatably installed in the housing, and the movable contact of the movable contact assembly is installed on the contact support. and is connected to the movable terminal board through a soft connection. A heat sink is provided on the side of the movable terminal board. The static contact is connected to the static terminal board. An arc extinguishing grid is provided on the side of the static contact.

The isolating switch of the utility model has the characteristics of convenient assembly.

Description of drawings

Figure 1 is an opening state diagram of the isolating switch of the present utility model;

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

Figure 3 is a schematic diagram of the cooperation between the movable contact and the static contact of the present utility model;

Figure 4 is a schematic structural diagram of the moving contact of the present utility model;

Figure 5 is an exploded view of the movable contact of the present utility model;

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

Figure 7 is a schematic diagram of the cooperation between the contact support and the moving contact of the present utility model;

Figure 8 is a schematic structural diagram of the contact support of the present utility model;

Figure 9 is a schematic diagram of the cooperation between the contact support and the arc blocking piece of the present utility model;

Figure 10 is a schematic structural diagram of the arc blocking member of the present utility model;

In the figure, 1. Moving contact; 2. Stationary contact; 3. Contact support; 30. Mounting hole; 11. Slide plate; 12. Contact plate; 41. Shielding structure; 40. Avoidance hole; 5. Snap structure ; 6. Housing; 61. Moving terminal board; 62. Static terminal board; 63. Soft connection; 64. Heat sink; 65. Arc extinguishing grid; 101. First axis; 13. Clamp; 14. Shrapnel; 102 , second shaft; 15. sleeve; 16. limit block; 31. sliding surface; 32. second sliding surface; 33. giving way; 34. giving surface; 51. elastic plate; 52. limiting claw ; 53. Limiting surface; 54. Snap surface; 35. Limiting plate; 10. Support plate; 42. Second shielding structure; 43. First side plate; 44. Second side plate; 45. Top plate; 46 , blocking surface; 47. first claw; 48. second claw; 470. first clamping block; 480. second clamping block; 481. installation groove; 36. step surface.

Detailed ways

The specific implementation of the isolating switch of the present invention will be further described below with reference to the embodiments given in the accompanying drawings. The isolating switch of the present invention is not limited to the description of the following embodiments.

As shown in Figures 1-5, the isolating switch of the present invention includes a movable contact assembly and a static contact 2. The movable contact assembly includes a movable contact 1 and a contact support 3. The movable contact 1 is installed on the contactor. On the head support 3, the contact support 3 is used to drive the contact plate 12 of the moving contact 1 to contact and separate from the stationary contact 2. The contact support 3 is provided with a through-mounting hole 30, and the moving contact 1 is inserted into Installed in the mounting hole 30, the contact support 3 is provided with an arc blocking piece. The movable contact 1 includes a contact plate 12 and a sliding plate 11 connected to the contact plate 12. The sliding plate 11 is in sliding fit with the mounting hole 30. , the arc blocking member is provided with a shielding structure 41 for blocking the opening of one end of the installation hole 30. An escape hole 40 is provided on the shielding structure 41, and one end of the contact plate 12 passes through the escape hole 40 and extends out of the installation hole 30. The installation A buckle structure 5 is provided inside the opening of the end of the hole 30 away from the arc blocking member. The slide plate 11 can be inserted into the installation hole 30 from the end provided with the buckle structure 5 and is blocked by the buckle structure 5 during installation. Hole 30.

In the moving contact assembly of the present invention, the buckle structure 5 is provided in the mounting hole 30 so that the slide plate 11 can be inserted into the mounting hole 30 from the buckling structure 5, thereby avoiding the need for the moving contact 1 to be disposed from the mounting hole 30. Inserting one end of the arc baffle not only avoids interference with the arc baffle, but also facilitates the installation of the movable contact 1. For example, first integrate the movable contact 1 with the soft connection and then install them into the installation hole 30 together.

As shown in Figure 1-2, the isolating switch of the present invention includes a housing 6 and a movable terminal block 61, a static terminal block 62, a moving contact assembly and a static contact 2 respectively installed at both ends of the housing 6. The head assembly includes a contact support 3 and a moving contact 1. The contact support 3 is rotatably installed in the housing 6. The moving contact 1 is installed on the contact support 3 and is connected to the moving terminal board 61 through a soft connection 63. For connection, a heat sink 64 is provided on the side of the movable terminal board 61 , the static contact 2 is connected to the static terminal board 62 , and a plurality of arc extinguishing grids 65 are provided on the side of the static contact 2 .

The isolating switch of the utility model has the characteristics of convenient assembly.

As shown in Figures 3-4, the movable contact assembly of this embodiment includes at least two sets of movable contacts 1. The at least two sets of movable contacts 1 are connected through a first shaft 101. This embodiment has two sets of movable contacts 1. Moving contacts 1, two groups of moving contacts 1 are arranged in a stack. Each group of moving contacts 1 includes two contact plates 12 arranged oppositely, and two clamping plates 13 arranged on the outer sides of the two contact plates 12. Two A contact space is formed between the contact plates 12 for the insertion of the static contact 2. The static contact 2 can be inserted into the contact space between the two contact plates 12. The clamping plate 13 is used to push the contact plate 12 to press the static contact 2 in the static contact space. On the side of the contact 2, the sliding plate 11 is provided on the clamping plate 13, and the sliding plate 11 is arranged corresponding to the side of the contact plate 12. In this embodiment, two sliding plates 11 are provided on each clamping plate 13, each The two sliding plates 11 on the clamping plate 13 are arranged oppositely on the two sides of the contact plate 12 . The sliding plate 11 of the movable contact 1 in this embodiment is arranged on the clamping plate 13 and is separated from the contact plate 12, which facilitates the use of different materials, improves the processing accuracy of the sliding plate 11 and reduces the cost. Of course, as other embodiments, the sliding plate 11 can also be integrally formed with the contact plate 12 .

Furthermore, at least one of the clamping plates 13 is provided with an elastic piece 14 on the outside. The elastic piece 14 is used to push the clamping plate 13 to push the contact plate 12. The elastic piece 14, the two contact plates 12 and the two clamping plates 13 in each set of movable contacts 1 pass through. The second shaft 102 is connected, and a limiting member is provided between the two contact plates 12. In this embodiment, the limiting member is a sleeve 15 and a limiting block 16. The sleeve 15 and the limiting block 16 are provided between the two contact plates 12. / or limit block 16, the sleeve 15 is sleeved on the second shaft 102. In this embodiment, an elastic piece 14 is provided on the side of each group of movable contacts 1 away from the other movable contact 1. The elastic piece 14 pushes the clamping plate 13 and The contact plate 12 moves along the second axis 102 to clamp the static contact 2. When the static contact 2 is inserted into the contact space, the static contact 2 can also open the contact space and push the contact plate 12 to move in the reverse direction to deform the elastic piece 14.

As shown in 6 and 8, the mounting hole 30 includes two sliding surfaces 31 arranged oppositely, and a second sliding surface 32 respectively connected between the two sliding surfaces 31, wherein at least one sliding surface 31 is provided with the Described buckle structure 5. Preferably, the buckle structure 5 cooperates with the two sliding plates 11 on the same side of the two clamping plates 13 in each group of movable contacts 1, and the two clamping plates 13 in each group of movable contacts 1 are far away from the two clamping structures 5 on one side. Each slide plate 11 cooperates with the other sliding surface 31 respectively, and the buckle structure 5 is only provided on one side of the mounting hole 30, which has the characteristics of simple structure, compact size and high reliability.

Preferably, one end of the movable contact 1 is matched with the static contact 2, and the other end is connected to the movable terminal block 61 through a soft connection 63. In order to improve the installation efficiency, the movable contact is first connected to the soft connection 63 and the movable terminal block during installation. 61 is welded, and then inserted into the contact support 3 for internal fixation, and the matching end of the moving contact 1 and the static contact 2 passes through the arc blocking piece. Since the movable contact 1 has been welded with the soft connection 63 and the movable terminal block 61, it is inconvenient to assemble through the end of the movable terminal block 61, that is, it is inconvenient to insert the installation hole 30 of the contact support 3 from one end close to the arc baffle. One end of the buckle structure 5 is inserted. The size of the end of the mounting hole 30 close to the buckle structure 5 is larger than the size of the end close to the arc blocking piece. The buckle structure 5 is provided with an elastic plate 51 to deform the sliding plate 11, so A relief groove 33 is provided at one end of the mounting hole 30 close to the buckle structure 5 to avoid deformation of the elastic plate 51 . The end of the contact plate 12 close to the buckle structure 5 is connected to the movable terminal board 61 through a soft connection 63 . The end of the contact plate 12 close to the buckle structure 5 is located in the installation hole 30 .

Specifically, the sliding surface 31 is provided with a relief groove 33 for accommodating the buckle structure 5. The relief groove 33 is provided with a relief surface 34 opposite to the other sliding surface 31. The buckle The structure 5 includes an elastic plate 51 and a limiting claw 52 provided on the elastic plate 51. The elastic plate 51 is spaced apart from the displacement surface 34. The elastic plate 51 is provided with a limiter arranged opposite to the sliding surface 31. The position surface 53, the opposing limiting surface 53 and the sliding surface 31 respectively limit the position of the movable contact 1 from the first direction. The limiting claw 52 is provided with a snap surface 54, and the mounting hole 30 is provided with a The step surface 36 of the first shaft 101 is limited. The step surface 36 and the buckle surface 54 respectively limit the position of the movable contact 1 from the second direction. The first direction and the second direction are arranged orthogonally.

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

Further, as shown in Figure 10, a support plate 10 is provided between the at least two sets of movable contacts 1. In this embodiment, only one support plate 10 is provided for the two sets of movable contacts 1. The support plate 10 is sleeved on the On the first shaft 101, the thickness of the limiting plate 35 is smaller than the thickness of the supporting plate 10. The supporting plate 10 can limit the distance between the two movable contacts 1 without causing the limiting plate 35 to limit the movement. The function of contact 1 is invalid.

As shown in Figure 6, the arc blocking member includes a second shielding structure 42 arranged on one side of the shielding structure 41. When the contact support 3 drives the movable contact 1 to leave the stationary contact 2, it can drive the second shielding structure 42 The second shielding structure 42 moves between the stationary contact 2 and the contact support 3 .

Further, as shown in FIG. 10 , the shielding structure 41 includes two first side plates 43 arranged oppositely, and a second side plate 44 respectively connected between the two first side plates 43 . The first side plates 43 It is connected to the second side plate 44 through the top plate 45. The escape hole 40 is provided on the top plate 45, and the top plate 45 is provided with a blocking surface 46.

In this embodiment, the arc blocking piece and the contact support three-piece arrangement and are snap-fastened. The arc blocking piece can be made of heat-resistant material. The moving contact 1 can also be installed from the end provided with the arc-blocking piece. Of course, the arc blocking piece can also be integrally formed with the contact support 3 .

Furthermore, the arc blocking member is provided with a first claw 47 and a second claw 48. The mounting hole 30 is provided with a first clamping block 470 that cooperates with the first claw 47. The contact support 3 is There is a second clamping block 480 that cooperates with the second claw 48. The contact support 3 is provided with a mounting slot 481 on the side of the second clamping block 480. The length direction of the mounting slot 481 is parallel to the axis of the contact support 3. During assembly, first insert the first claw 47 into the mounting hole 30 and be located on the side of the first clamping block 470. The second claw 48 is inserted into the mounting groove 481 and moves along the axis of the head support 3 to align with the second clamping block. 480 to limit the position, it can drive the first claw 47 and the second clamping block 480 to limit the position.

It should be noted that in the description of the present utility model, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship, or the orientation or positional relationship commonly placed during use, is only for convenience of description, and does not indicate that the device or component referred to must have a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions and cannot be understood as indicating relative importance.

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