CN218568691U - Arc extinguishing structure of rotary switch, contact module and rotary switch - Google Patents

Abstract

The utility model discloses a rotary switch's arc extinguishing structure, contact module and rotary switch, include: one or more contact modules and operation modules stacked in sequence; the contact module includes: the arc extinguishing device comprises a shell, a contact assembly, a rotating shaft and an arc extinguishing assembly, wherein the contact assembly, the rotating shaft and the arc extinguishing assembly are arranged in the shell; the contact assembly comprises a moving contact assembly, a fixed contact assembly and a wiring assembly, the moving contact assembly is mounted on the rotating shaft, the fixed contact assembly is mounted at the periphery of the rotating shaft, and the moving contact assembly is driven to be in contact with and disconnected from the fixed contact assembly through the rotation of the rotating shaft; the rotating shaft is provided with first magnetic steel, and when the rotating shaft rotates to control the switch to be switched on and switched off, the first magnetic steel positioned on the rotating shaft can rotate along with the rotating shaft. The utility model discloses a rotary switch has better striking ability, guarantees the stable disjunction ability of product under high voltage, heavy current.

Description

Arc extinguishing structure of rotary switch, contact module and rotary switch

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to rotary switch's arc extinguishing structure, contact module and rotary switch.

Background

The existing rotary isolating switch is mostly applied to a low-power circuit with lower voltage, and the breaking capacity is often insufficient when the rotary isolating switch faces a high-power high-direct-current voltage circuit. The direct current circuit has no zero-crossing effect, and the larger the current is, the more difficult the generated arc is to extinguish.

At present, a method of increasing the opening distance of a stationary contact and connecting a plurality of stationary contacts in series is generally adopted for an isolating switch used for switching a high-power circuit. The method of increasing the open distance and the series connection of the stationary contacts can lead to the increase of the structural size of the product, occupy the installation space and increase the production cost.

In order to solve the problems, a plurality of rotary isolating switches adopt means of additional magnetic steel, an arc extinguishing chamber and the like, and the arc striking and arc extinguishing capacity of the rotary switch when the contact is disconnected is improved. Most of the existing magnetic steels are arranged below the moving and static contacts or embedded in the periphery of the shell, so that the trend of point arrangement is presented, and the arrangement mode often causes the complexity of the product assembly process and increases the cost.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a rotary switch's arc extinguishing structure, contact module and rotary switch, be favorable to simplifying switch structure, assembly process and provide more stable arc extinguishing ability.

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

the utility model provides a rotary switch's arc extinguishing structure, the arc extinguishing structure is including setting up first magnet steel and the arc extinguishing subassembly in the rotation axis, the arc extinguishing subassembly is including closing on the explosion chamber that the stationary contact subassembly set up, and the rotation axis is used for driving moving contact subassembly rotates the contact and the disconnection that realize with the stationary contact subassembly.

Preferably, an axially extending mounting hole is formed in the rotating shaft, and the first magnetic steel is arranged in the mounting hole.

Preferably, the first magnetic steel comprises a plurality of magnetic steel units stacked and combined in the same magnetic pole mode.

Preferably, the arc extinguishing component further comprises second magnetic steel, and the second magnetic steel is arranged on one side, far away from the rotating shaft, of the arc extinguishing chamber.

Preferably, one side that the rotation axis was kept away from to the explosion chamber is provided with the second magnet steel mounting groove that is used for installing the second magnet steel, the extending direction of second magnet steel mounting groove with the axis of rotation axis is parallel.

Preferably, the second magnetic steel mounting groove is of a circular groove structure, and the second magnetic steel is of a cylindrical structure.

The utility model also provides a rotary switch's contact module, including set up contact subassembly, rotation axis and any one of the arc extinguishing structure in the casing; the contact assembly comprises a moving contact assembly, a fixed contact assembly and a wiring assembly, the moving contact assembly is installed on the rotating shaft, the fixed contact assembly is installed on the periphery of the rotating shaft, an arc extinguishing assembly of an arc extinguishing structure is arranged on the periphery of the moving contact assembly, and the moving contact assembly is driven to rotate through rotation of the rotating shaft to achieve contact and disconnection with the fixed contact assembly.

Preferably, the housing is provided with a moving contact assembly mounting area, the size of the moving contact assembly mounting area is the rotation range of the moving contact assembly, the housing includes two opposite first side walls and two opposite second side walls, the two first side walls and the two second side walls are arranged on the periphery of the moving contact assembly mounting area, the first side walls and the second side walls are arranged adjacently, a square area is defined by the first side walls and the second side walls, a triangular vacant space is formed between the first side walls and the second side walls and the moving contact assembly mounting area in the four corner areas of the square area, and the two opposite first vacant spaces form an arc extinguish chamber mounting groove of the arc extinguish assembly.

Preferably, the arc extinguishing chamber of the arc extinguishing structure is a triangular arc extinguishing chamber adapted to the shape of the vacant space, and the arc extinguishing chamber comprises a first side surface arranged in parallel corresponding to the first side wall, a second side surface arranged in parallel corresponding to the second side wall, and an arc surface corresponding to the mounting area of the moving contact assembly; and a second magnetic steel mounting groove is formed in the joint of the first side surface and the second side surface of the arc extinguish chamber.

Preferably, the other two opposite second vacant spaces are communicated with the arc extinguish chamber mounting groove to form a gradually enlarged air outlet channel, and an air guide hole is formed in the second side wall on one side of the second vacant space.

Preferably, an arc-shaped arc isolating rib is further arranged between the air outlet channel and the moving contact component mounting area.

Preferably, the housing further includes a third sidewall spaced from and parallel to the second sidewall, and a wire connecting assembly mounting slot for receiving the wire connecting assembly and the stationary contact assembly is formed between the second sidewall and the third sidewall.

The utility model also provides a rotary switch, including operating module and the aforesaid arbitrary one or more contact module, operating module with one or more contact module pile up the setting in proper order, operating module's handle and one or more contact module's rotation axis linkage.

The utility model discloses a rotary switch, in its arc extinguishing structure, first magnet steel is arranged in the rotation axis at contact assembly center, along with rotation axis, keeps unchangeable with the distance of moving contact, can provide more stable even magnetic field, further improves the striking ability of product, guarantees the stable breaking capacity of product under high voltage, heavy current.

Furthermore, based on the structure and the arrangement mode of the arc extinguishing assembly in the embodiment, the breaking capacity of the arc extinguishing assembly is further improved, and the arc extinguishing assembly is suitable for circuits with higher power.

Drawings

Fig. 1 is a schematic structural view of a rotary switch body according to an embodiment of the present invention;

fig. 2 is a schematic assembly diagram of the rotary switch body according to the embodiment of the present invention;

fig. 3 is a schematic diagram of an operation module of a rotary switch according to an embodiment of the present invention;

figure 4 is a schematic view of the contact module assembly of an embodiment of the present invention;

fig. 5 is a schematic structural view of a contact module housing according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an opening state of a contact module according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a closing state of the contact module according to the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an arc extinguish chamber according to an embodiment of the present invention;

fig. 9 is a schematic view of a magnetic steel structure according to an embodiment of the present invention;

fig. 10 is a schematic structural view of another rotating shaft according to an embodiment of the present invention.

Detailed Description

The following provides an example with reference to the accompanying drawings, further illustrating the specific implementation of the rotary switch of the present invention. The rotary switch of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1 to 9, the rotary switch provided in this embodiment includes: one or more contact modules 1 and manipulator modules 2 arranged one above the other. The plurality of contact modules 1 may be fixedly connected by bolts, snaps, or other means, and the plurality of contact modules 1 may form a multi-pole combination of a rotary switch.

Wherein the contact module 1 comprises: a housing 200, a contact assembly 100 installed in the housing 200, a rotation shaft 400, and an arc extinguishing structure. The contact assembly 100 includes a moving contact assembly 120, a fixed contact assembly 130 and a wiring assembly 110, the moving contact assembly 120 is mounted on a rotating shaft 400 and driven by the rotating shaft 400 to rotate around its axis, the fixed contact assembly 130 is mounted on the periphery of the rotating shaft 400, and the moving contact assembly 120 is driven by the rotation of the rotating shaft 400 to rotate so as to be in contact with and disconnected from the fixed contact assembly 130.

As shown in fig. 2 to 3, the operation module 2 is located on the top of the rotary switch, and is composed of a handle 201, a housing 202, an operation mechanism 204, and a partition plate 203. One end of an operating mechanism 204 positioned in the center of the interior of the shell 202 can be connected with the handle 201 through a fixing mode such as a screw, and the other end is connected with a transmission shaft 205 which is slidably arranged on the middle partition plate 203; the intermediate partition 203 is fixedly connected to the housing 202, the uppermost contact module 1 is fixedly connected to the intermediate partition 203 of the operating module 2, the handle 201 is coupled to the rotary shaft 400 of the contact module 1 via the operating mechanism 20, and the rotary shafts 400 of the plurality of contact modules 1 are coupled.

Referring to fig. 4, taking one of the contact modules 1 as an example, the single-layer contact module 1 includes a contact assembly 100 installed at the center of the housing 200, a rotating shaft 400, and an arc extinguishing structure, where the arc extinguishing structure includes a first magnetic steel 500 disposed on the rotating shaft 400 and an arc extinguishing assembly 300 circumferentially disposed on the outer periphery of the contact assembly 100 and adjacent to the stationary contact assembly 130, and when the rotating shaft 400 rotates to control switching on and off, the first magnetic steel 500 on the rotating shaft 400 can rotate along with the rotating shaft 400; the contact assembly 100 comprises a moving contact assembly 120, a fixed contact assembly 130 and a wiring assembly 110; the moving contact component 120 is driven by the rotating shaft 400 to rotate around its own axis, so as to realize the contact and disconnection with the static contact component 130.

Preferably, the arc extinguishing assembly 300 includes an arc extinguishing chamber 310 disposed adjacent to the stationary contact assembly 130, and a second magnetic steel 320, and the second magnetic steel 320 is disposed on a side of the arc extinguishing chamber 310 away from the rotating shaft 400. One side that rotation axis 400 was kept away from to explosion chamber 310 is provided with the second magnet steel mounting groove 313 that is used for installing second magnet steel 320, the extending direction of second magnet steel mounting groove 313 with rotation axis 400's axis is parallel, and second magnet steel 320 is installed in second magnet steel mounting groove 313, and first magnet steel 500 and second magnet steel 320 are located the both sides of explosion chamber 310 respectively.

In this embodiment, the rotating shaft 400 is provided with an axially extending mounting hole 450, the first magnetic steel 500 is shaped to fit the mounting hole 450 and is disposed in the mounting hole 450, when the rotating shaft 400 rotates to control the switch to switch on and off, the first magnetic steel 500 on the rotating shaft 40 can rotate along with the rotating shaft 40, and in this embodiment, the first magnetic steel 500 is an integral structure. Of course, the arrangement manner of the first magnetic steel 500 is not limited to the manner provided in this embodiment, and in some possible embodiments, for example, the first magnetic steel 500 is arranged in a tubular shape and sleeved on the rotating shaft 400.

As a preferred embodiment, the first magnetic steel 500 is disposed in the central region of the rotating shaft 400, and the structure thereof also adopts a structure symmetrical to the axis of the rotating shaft 400, and it rotates in the central region along with the rotating shaft 400, so that the magnetic field generated by the magnetic steel is more stable and uniform, and the arc striking capability of the product is ensured.

As a further improvement, please refer to fig. 10, the first magnetic steel 500 may be formed by stacking and combining a plurality of magnetic steel units 501 in a manner of having the same magnetic poles, and based on the structure of the first magnetic steel 500, different height combinations of the first magnetic steel 500 may be realized, thereby satisfying the requirements of products with different specifications to control the strength of the internal magnetic field.

In this embodiment, referring to fig. 5, the housing 200 is provided with a moving contact assembly mounting area 280, and the moving contact assembly mounting area 280 is located in a central area of the housing 200 and is equal to the rotation range of the moving contact assembly 120. In addition, the housing 200 further includes two oppositely disposed first sidewalls 211 and two oppositely disposed second sidewalls 212 disposed at the periphery of the movable contact assembly mounting region 280, the first sidewalls 211 and the second sidewalls 212 are disposed adjacently, and are adjacent to the movable contact assembly mounting region 280, a square region is defined by the first sidewalls 211 and the second sidewalls 212, and a vacant space close to a triangular shape is formed between the movable contact assembly mounting region 280 and the four corner regions of the square region, wherein the two oppositely disposed first vacant spaces form the arc extinguishing chamber mounting grooves 210 and 210a of the arc extinguishing assembly 300. In this embodiment, the area surrounded by the first sidewall 211 and the second sidewall 212 is a square area as a whole, and is disposed in an area close to the moving contact assembly mounting area 280, so as to reduce the length and width of the housing 200 to the maximum extent, and meanwhile, four vacant spaces located in the corner areas are formed between the square area and the circular moving contact assembly mounting area 280, so that two of the four corner areas can be fully utilized to mount the arc extinguishing chamber, thereby making the structure of the arc extinguishing switch more compact, and facilitating miniaturization of the whole product.

The other two opposite second empty spaces are communicated with the arc extinguish chamber mounting grooves 210 and 210a to form gradually enlarged air outlet channels 220 and 220a (which are formed by the first side wall 211, the second side wall 212 and a section of arc-shaped periphery of the movable contact assembly 100 on the movable contact assembly mounting area 280, namely, the second empty spaces), and air guide holes 230 and 230a are arranged on the second side wall 212 on one side of the second empty space. When the rotary switch is disconnected, the arc led out by the arc extinguishing component 300 can be rapidly discharged from the contact module through the air outlet channels 220 and 220a and the air guide holes 230 and 230a, the air outlet channels 220 and 220a are gradually enlarged from inside to outside and are in a horn shape, the pressure difference between the inside and the outside can be effectively kept, and the exhaust is more efficient. In addition, the second vacant space is fully utilized, the space enclosed by the first side wall and the second side wall 212 is basically fully utilized, no redundant waste is generated, and the compactness of the structure is further improved.

Further, arc-shaped arc isolating ribs 270 and 270a are further arranged between the air outlet channels 230 and 230a and the moving contact assembly mounting area 280, the moving contact assembly 120 can be isolated from the air outlet channels 220 and 220a by the arc isolating ribs 270 and 270a, the moving contact assembly 120 cannot be burned by high-temperature electric arcs in an arc striking and exhausting stage, and the service life of a product is effectively prolonged.

As a specific embodiment, referring to fig. 5 to 8, the arc extinguishing assembly 300 includes: an arc extinguishing chamber 310 approximately triangular corresponding to the shape of the first empty space, and a second magnetic steel 320, wherein the arc extinguishing chamber 310 includes a first side (not labeled in the figure) disposed in parallel corresponding to the first side wall 211, a second side (not labeled in the figure) disposed in parallel corresponding to the second side wall 212, and an arc surface (not labeled in the figure) corresponding to the moving contact assembly mounting area 280. The shape of the arc-extinguishing chamber 310 in this embodiment corresponds to the shape of the first empty space, so that the internal space of the arc-extinguishing chamber 310 is maximally expanded.

The exterior of the arc extinguishing chamber 310 is an arc extinguishing cover 311 made of insulating materials, the exterior of the arc extinguishing cover 311 is an arc-shaped structure corresponding to the motion track of the moving contact component 120, a plurality of metal arc extinguishing grid pieces 312 are clamped inside the arc extinguishing cover 311, and the second magnetic steel 320 is a permanent magnet. Particularly, the magnetic steel mounting groove 313 is disposed at a corner of the arc extinguishing chamber 311, that is, the second magnetic steel mounting groove 313 is disposed at a junction of the first side surface and the second side surface of the arc extinguishing chamber 310, an extending direction of the second magnetic steel mounting groove 313 is parallel to an axis of the rotating shaft 400, the second magnetic steel 320 is disposed in the second magnetic steel mounting groove 313, and the magnetic steel mounting groove 313 and the second magnetic steel 320 can be mounted on the arc extinguishing chamber mounting groove 210 of the housing 200 in a matching manner. The second magnetic steel mounting groove 313 in this embodiment is a circular groove structure, and the second magnetic steel 320 is cylindrical, but may have other shapes. When the moving contact and the static contact are disconnected, the magnetized metal arc-extinguishing grid piece 312 is matched with the first magnetic steel and the second magnetic steel, so that electric arcs can be rapidly introduced into the arc-extinguishing chamber 310 and discharged through the air outlet channel 220 and the air guide holes 230.

In this embodiment, the housing 200 further includes a third sidewall 213 spaced apart from and parallel to the second sidewall 212, and wiring assembly mounting slots 240, 240a for accommodating the wiring assembly 110 and the stationary contact assembly 130 are formed between the second sidewall 212 and the third sidewall 213. Therefore, the wiring component 110 and the static contact component 130 can be fully arranged in the housing 200, and the neatness and the safety of the housing are further improved. Of course, a notch (not shown) is further formed on the third sidewall 213 to facilitate wiring connection and to allow the air hole 230 to communicate with the outside.

Referring to fig. 4, the wiring component 110 and the static contact component 130 are integrally formed copper sheet structures, copper sheet mounting locations 260 for mounting the copper sheet structures are disposed in the wiring component mounting grooves 240 and 240a, and the copper sheet structures are mounted in the copper sheet mounting locations 260, so that the mounting of the wiring component 110 and the static contact component 130 is completed.

Furthermore, positioning posts 250 are further disposed in the wiring assembly mounting grooves 240, 240a, and the contact modules 1 can be positioned and mounted through the positioning posts 250 on the housing 200, and finally, the contact modules 1 are fixedly connected with the operating module 2 through bolts or other means.

Referring to fig. 5-7, in the present embodiment, the contact module 100 has a pair of moving and stationary contacts and is symmetrically arranged, so that the arc extinguishing assemblies 300 inside the housing 200 are arranged in a central symmetry to ensure the arc extinguishing performance on the moving path of the moving contact assembly. Therefore, the arc extinguishing chamber mounting groove 210, the air outlet passage 220, the air guide opening 230 and the wiring member mounting groove 240 are also arranged in a central symmetry.

Referring to fig. 6-7, in the present embodiment, the contact module 100 has two states, i.e., open state and closed state. In this embodiment, when the contact module 100 is in an open state, the rotating shaft 400 rotates clockwise to drive the moving contact assembly 120 to rotate counterclockwise to implement closing; when the contact module is in a closing state, the rotating shaft 400 rotates counterclockwise to drive the moving contact assembly 120 to rotate counterclockwise to achieve opening. Therefore, to ensure effective arc extinction, the arc extinction assembly 300 is located just on the rotation path of the movable contact assembly 120.

In this embodiment, the internal structures of the contact modules 1 of the layers of the rotary switch are the same, and certainly, in some special application scenarios, a certain layer of the contact module 1 has an internal structure different from those of other layers.

Based on the above, the operation procedure of the rotary switch in the present embodiment is as follows:

the operating mechanism 204 is connected to a rotating shaft 400 in the contact module 1 through a transmission shaft 205, and the rotating shaft 400 can drive the movable contact assembly 100 to rotate in the housing 200. Therefore, when the handle 201 is rotated, the operating mechanism 204 drives the rotating shaft 400 to rotate through the transmission shaft 205, and further drives the movable contact assembly 100 to rotate, so as to control the on/off of the whole rotary switch.

The utility model discloses a rotary switch, among its contact module, first magnet steel arranges in the rotation axis at contact assembly center, can provide more stable even magnetic field, further improves the striking ability of product, guarantees the stable breaking capacity of product under high voltage, heavy current.

Furthermore, based on the structure and the arrangement mode of the arc extinguishing assembly in the embodiment, the breaking capacity of the arc extinguishing assembly is further improved, and the arc extinguishing assembly is suitable for circuits with higher power.

Based on the above embodiments, the present invention can also provide an arc extinguishing structure for a rotary switch, the arc extinguishing structure is disposed on the first magnetic steel 500 on the rotating shaft 400, when the rotating shaft 400 rotates to control the switch to open and close, the first magnetic steel 500 on the rotating shaft 400 can rotate along with the rotating shaft 400; and an arc extinguishing assembly 300 disposed at an outer periphery of the movable contact assembly 120, the arc extinguishing assembly 300 including: an arc extinguishing chamber 310 disposed adjacent to the static contact assembly 130, and a second magnetic steel 320 disposed opposite to the first magnetic steel 500.

Based on the above embodiment, the utility model also provides a contact module for rotary switch, this contact module includes: the housing 200, the contact assembly 100, the rotating shaft 400, and the arc extinguishing structure of the above embodiments.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship that is usually placed when used, and are only for convenience of description, but do not indicate that the device or element that is referred to must have a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish one description from another, and are not to be construed as indicating relative importance.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (13)

1. The arc extinguishing structure of the rotary switch is characterized by comprising first magnetic steel (500) and an arc extinguishing assembly (300), wherein the first magnetic steel and the arc extinguishing assembly (300) are arranged on a rotating shaft (400), the arc extinguishing assembly (300) comprises an arc extinguishing chamber (310) which is arranged close to a static contact assembly (130), and the rotating shaft (400) is used for driving a moving contact assembly (120) to rotate to achieve contact and disconnection with the static contact assembly (130).

2. An arc extinguishing structure of a rotary switch according to claim 1, characterized in that: the rotating shaft (400) is provided with an axially extending mounting hole (450), and the first magnetic steel (500) is arranged in the mounting hole (450).

3. An arc extinguishing structure of a rotary switch according to claim 2, characterized in that: the first magnetic steel (500) is formed by stacking and combining a plurality of magnetic steel units (501) in a magnetic pole-same mode.

4. An arc extinguishing structure of a rotary switch according to claim 1, characterized in that: the arc extinguishing component (300) further comprises second magnetic steel (320), and the second magnetic steel (320) is arranged on one side, far away from the rotating shaft (400), of the arc extinguishing chamber (310).

5. An arc extinguishing structure of a rotary switch according to claim 4, wherein: one side that rotation axis (400) were kept away from in explosion chamber (310) is provided with second magnet steel mounting groove (313) that are used for installing second magnet steel (320), the extending direction of second magnet steel mounting groove (313) with the axis of rotation axis (400) is parallel.

6. An arc extinguishing structure of a rotary switch according to claim 5, wherein: the second magnetic steel mounting groove (313) is of a circular groove structure, and the second magnetic steel (320) is of a cylindrical structure.

7. A contact module for a rotary switch, characterized by: comprising a contact assembly (100) arranged in a housing (200), a rotary shaft (400), and an arc extinguishing structure according to any of claims 1-6; the contact assembly (100) comprises a moving contact assembly (120), a fixed contact assembly (130) and a wiring assembly (110), wherein the moving contact assembly (120) is installed on the rotating shaft (400), the fixed contact assembly (130) is installed on the periphery of the rotating shaft (400), an arc extinguishing assembly (300) of an arc extinguishing structure is arranged on the periphery of the moving contact assembly (120), and the moving contact assembly (120) is driven to rotate through the rotation of the rotating shaft (400) to realize contact and disconnection with the fixed contact assembly (130).

8. A contact module of a rotary switch according to claim 7, characterized in that: the shell (200) is provided with a moving contact assembly mounting area (280), the size of the moving contact assembly mounting area (280) is the rotation range of the moving contact assembly (120), the shell (200) comprises two first side walls (211) which are oppositely arranged and two second side walls (212) which are oppositely arranged, the two first side walls (211) and the two second side walls (212) are arranged on the periphery of the moving contact assembly mounting area (280), the first side walls (211) and the second side walls (212) are adjacently arranged, a square area is defined by the first side walls (211) and the second side walls (212), and a triangular vacant space is formed between the first side walls and the moving contact assembly mounting area (280) in four corner areas of the square area, wherein the two first vacant spaces which are oppositely arranged form arc extinguishing chamber mounting grooves (210 and 210 a) of the arc extinguishing assembly (300).

9. A contact module of a rotary switch according to claim 8, characterized in that: the arc extinguishing chamber (310) of the arc extinguishing structure is a triangular arc extinguishing chamber (310) matched with the shape of the vacant space, and the arc extinguishing chamber (310) comprises a first side surface arranged in parallel corresponding to the first side wall (211), a second side surface arranged in parallel corresponding to the second side wall (212) and an arc-shaped surface corresponding to the movable contact assembly mounting area (280); and a second magnetic steel mounting groove (313) is formed in the joint of the first side surface and the second side surface of the arc extinguishing chamber (310).

10. A contact module of a rotary switch according to claim 8, characterized in that: the other two opposite second vacant spaces are communicated with the arc extinguish chamber mounting grooves (210, 210 a) to form gradually enlarged air outlet channels (220, 220 a), and air guide holes (230, 230 a) are formed in a second side wall (212) on one side of each second vacant space.

11. A contact module of a rotary switch according to claim 10, characterized in that: and an arc-shaped arc isolating rib (270, 270 a) is also arranged between the air outlet channel (230) and the moving contact component mounting area (280).

12. A contact module of a rotary switch according to claim 8, characterized in that: the housing (200) further comprises a third side wall (213) arranged in parallel and at a distance from the second side wall (212), and a wiring assembly mounting groove (240, 240 a) for accommodating the wiring assembly (110) and the static contact assembly (130) is formed between the second side wall (212) and the third side wall (213).

13. A rotary switch, characterized in that: comprising an operating module (2) and one or more contact modules (1) according to any of claims 7 to 12, the operating module (2) and the one or more contact modules (1) being arranged one above the other, the handle (201) of the operating module (2) being coupled to the axis of rotation (400) of the one or more contact modules (1).

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