A rotary switch

Abstract

The present invention discloses a rotary switch, comprising a housing, a rotating shaft and a static contact, wherein the rotating shaft comprises a driving member and an arc-isolating seat, and the driving member comprises a mounting cavity and a moving contact assembly. When assembling the rotary switch, the moving contact assembly is first inserted into the mounting cavity, and then the driving member and the arc-isolating seat are connected into one body through a connecting structure, and finally the whole is installed into the movement space of the housing. The advantage of such a design is that modular installation is achieved through the integrated installation of the driving member and the moving contact assembly, thereby improving the installation speed, and the driving member and the arc-isolating seat are arranged in a split installation structure, so that the arc-isolating seat can be quickly replaced after wear and tear, and the arc-isolating seat and the driving member can be made of different materials, such as the driving member using a high-strength material such as nylon, and the arc-isolating seat using a gas-generating material with improved arc-extinguishing performance, which can not only improve the arc-extinguishing ability of the contact structure, but also ensure the overall strength of the product and increase the service life of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of switches, and in particular to a rotary switch. Background Art

[0002] In existing photovoltaic systems, rotary disconnectors are typically used to isolate, protect, and disconnect individual photovoltaic cells. These conventional rotary disconnectors consist of a mechanism and a contact system, with the contact system housing typically constructed from multiple stacked housings. Each housing layer includes a moving contact group, its associated stationary contacts, a moving contact group bracket, and an arc-extinguishing chamber. The synchronous rotation of two adjacent moving contact groups relies on the coordination of the moving contact groups and brackets within the adjacent layers, ensuring the synchronized rotation of the moving and stationary contacts within the multi-layer housing. For example, patent CN213400978U discloses a contact bracket made of a gas-generating material to increase the gas blowing effect and improve the arc extinguishing ability, but the structural strength is low and the product service life is short. Patent CN209343975U discloses a moving contact assembly for a rotary switch, including a moving contact rotating frame, the moving contact rotating frame including a driving part, a supporting part, and an arc extinguishing part, the driving part is arranged at the center position of the supporting part, the arc extinguishing part is arranged on the periphery of the supporting part, an arc extinguishing groove for the static contact to extend into is provided on the arc extinguishing part, the supporting part is provided with at least one moving contact sleeved outside the driving part, a part of the moving contact is located in the arc extinguishing groove, and the arc extinguishing part is fixed with a magnet above and / or below the arc extinguishing groove. This type of moving contact assembly uses the magnetic force of a magnet to extinguish the arc by magnetic blowing. The arc extinguishing effect is slightly smaller than that of gas blowing, and the overall strength is higher. However, there is a problem with both of the above products. When assembling or replacing the contact bracket, the moving contact assembly needs to be installed into the contact bracket in turn for fastening. There are many installation steps, the operation is cumbersome, and modular installation cannot be achieved. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problems in the prior art of multiple installation steps of the moving contact assembly, cumbersome operation, and inability to achieve modular installation, thereby providing a rotary switch that can quickly install the moving contact assembly and achieve modular installation.

[0004] The present invention provides a rotary switch, comprising:

[0005] A multi-layer shell, each layer of the shell is provided with a movement space;

[0006] At least two static contacts are arranged in the housing around the movement space;

[0007] A rotating shaft is rotatably arranged in the movement space, and includes a driving member and an arc-isolating seat that are fixedly connected by a connecting structure; the driving member includes a mounting cavity that is radially penetrated on the driving member, and a moving contact assembly that is linked to the driving member through the mounting cavity, and two clamping openings are provided at both ends of the moving contact assembly, respectively extending out of the mounting cavity; a slot structure is provided on the arc-isolating seat, and two arc-extinguishing grooves are provided on the outer peripheral side wall of the arc-isolating seat for the static contact to extend into; the driving member is plugged and fixed in the slot structure, and at least a part of the clamping opening is located in the arc-extinguishing groove, so that when the rotating shaft rotates, the moving contact assembly is driven to contact and separate with the corresponding static contact.

[0008] In the above-mentioned rotary switch, the arc isolation seat is further provided with a slot structure that penetrates the slot hole structure in its radial direction, and the top of the driving member is provided with a baffle that shields the slot hole structure and the slot structure.

[0009] In the above-mentioned rotary switch, the connection structure includes at least two snap-on slots provided on the driving member, and elastic snaps correspondingly provided in the slot structure, with a clearance provided between the slot structure and the elastic snaps.

[0010] In the above-mentioned rotary switch, a guide structure is further provided between the driving member and the elastic buckle. The guide structure includes a guide slope provided on the elastic buckle and a guide groove provided on the driving member. The guide groove and the buckle groove are arranged in sequence along the insertion direction of the elastic buckle.

[0011] In the above-mentioned rotary switch, the slot structure is at least partially a through hole, a synchronization shaft is provided on the top of the driving member, and a synchronization groove is provided on the bottom of the driving member; the synchronization shaft of one of the rotating shafts is inserted into the synchronization groove on the rotating shaft in the adjacent layer of the shell to form a synchronous rotation fit.

[0012] In the above-mentioned rotary switch, a direction positioning component is further provided between the synchronization shaft and the synchronization groove. The direction positioning component includes a U-shaped groove provided on the synchronization shaft, and a U-shaped protrusion provided in the synchronization groove corresponding to the U-shaped groove. When the synchronization shaft is inserted into the synchronization groove, the U-shaped protrusion is clamped and fixed in the U-shaped groove.

[0013] In the above-mentioned rotary switch, the two ends of the installation cavity are respectively an inlet end and an outlet end, and a limiting structure is provided between the moving contact assembly, the driving member and the slot structure. The limiting structure includes at least one group of limiting protrusions arranged on both sides of the moving contact assembly, a first limiting retaining wall arranged on both sides of the outlet end, and a second limiting retaining wall arranged between the slot structure and the slot structure for preventing the limiting protrusion from detaching from the inlet end. When the moving contact assembly passes through the outlet end, it drives the limiting protrusion to cooperate with and abut against the first limiting retaining wall.

[0014] In the above-mentioned rotary switch, two sets of arc-extinguishing hoods and at least two permanent magnets are provided on the periphery of the motion space along the rotation path of the rotating shaft. The two sets of arc-extinguishing hoods are respectively arranged adjacent to the two static contacts, and the permanent magnets are arranged on the non-opening sides of the arc-extinguishing hoods.

[0015] In the above-mentioned rotary switch, an exhaust structure is provided between the static contact and the arc extinguishing cover, and the exhaust structure includes an exhaust area provided in the housing, an exhaust hole provided on the side wall of the exhaust area and communicating with the outside of the housing, and an extinguishing plate provided in the exhaust area.

[0016] In the above-mentioned rotary switch, the moving contact assembly includes two moving contact pieces and two metal spring pieces, and the moving contact piece is provided with a limiting boss for limiting the two ends of the metal spring pieces, and a positioning structure is respectively provided between the two metal spring pieces and the mounting cavity; the positioning structure includes a positioning hole arranged at the top of the mounting cavity, and an upper positioning protrusion corresponding to the positioning hole arranged on one of the metal spring pieces, and the upper positioning protrusion is snapped into the positioning hole; the positioning structure also includes a positioning slide groove arranged at the bottom of the mounting cavity, and a lower positioning protrusion corresponding to the positioning slide groove arranged on the other metal spring piece, and the lower positioning protrusion is slidably snapped into the positioning slide groove.

[0017] The technical solution of the present invention has the following advantages over the prior art:

[0018] 1. The rotary switch provided by the present invention completes the assembly by first inserting and fixing the moving contact assembly into the installation cavity of the driving member, so that the moving contact assembly and the driving member are connected as one, and then the driving member and the arc-isolating seat are connected as one through a connecting structure. Finally, the driving member and the arc-isolating seat are installed together into the movement space of the shell. The advantage of this design is that modular installation is achieved through the integrated installation of the driving member and the moving contact assembly, which improves the installation speed. In addition, the driving member and the arc-isolating seat are arranged in a split installation structure, so that the arc-isolating seat can be quickly replaced after wear. At the same time, the arc-isolating seat and the driving member can be made of different materials. For example, the driving member can be made of high-strength materials such as nylon, and the arc-isolating seat can be made of gas-generating materials with improved arc-extinguishing performance. This can not only improve the arc-extinguishing ability of the contact structure, but also ensure the overall strength of the product and increase the service life of the product.

[0019] 2. The rotary switch provided by the present invention provides a mounting position for the driving member by providing a slot structure on the arc isolation seat, and by providing the slot structure so that the two clamping openings respectively extend to the outer periphery of the arc isolation seat. Then, a baffle provided on the top of the driving member shields the slot structure and the slot structure, so that a large amount of high-temperature gas generated by the arc burning the arc extinguishing trough will not move toward the top of the rotating shaft, but will only move toward the surroundings of the rotating shaft. At the same time, the sealing between the two adjacent shells is also increased to prevent the arc from moving inside the shell.

[0020] 3. The rotary switch provided by the present invention utilizes the snap-fitting cooperation between the elastic clip and the clip groove, so that the driving member can be directly mounted and fixed to the arc isolation seat without the need for other riveting installation methods. The structure is simple and the installation is convenient and quick. A clearance is provided between the slot structure and the two elastic clips, thereby leaving sufficient deformation space for the elastic clip to avoid damage to the elastic clip.

[0021] 4. The rotary switch provided by the present invention, through the plug-in fit of the square synchronization shaft and the synchronization groove, enables the operating mechanism of the rotary switch to control multiple groups of rotary switches to perform synchronous opening or closing actions. At the same time, in order to ensure that the installation direction of multiple groups of rotary switches is consistent, the U-shaped groove and U-shaped protrusion are used to identify the installation direction, preventing problems such as incorrect or reverse installation of multiple groups of rotary switches.

[0022] 5. The rotary switch provided by the present invention is provided with a first limit stop wall at the outlet end of the installation cavity and a limit protrusion on the moving contact assembly. The limiting cooperation between the first limit stop wall and the limit protrusion ensures that the moving contact assembly will not be over-inserted during the process of being inserted into the installation cavity, ensuring that the moving contact assembly can be connected to the driving member as a whole to facilitate subsequent modular installation work. In addition, a second limit stop wall is provided between the slot structure and the slot structure, and the limit protrusion on the moving contact assembly is clamped against the entrance end of the installation cavity through the second limit stop plate to prevent the moving contact assembly from being pulled out from the entrance end when the driving member is fixed in the arc isolation seat, thereby improving the safety and reliability of the product during use.

[0023] 6. The rotary switch provided by the present invention utilizes the permanent magnet to attract the arc and move it into the arc extinguishing hood, so that the arc is quickly extinguished by the arc extinguishing hood, thereby improving the arc extinguishing capability of the product.

[0024] 7. In the rotary switch provided by the present invention, the gas generated by the arc-isolating seat being burned by the electric arc will be discharged outside the shell through the exhaust area and the exhaust hole. At the same time, the free-flowing plate is arranged in the exhaust area, which can effectively avoid the arc spraying problem in the shell and improve the safety of the product during use.

[0025] 8. The rotary switch provided by the present invention ensures the installation position of the metal spring by providing a limiting boss on the moving contact piece, ensuring that the biasing force applied by the metal spring piece can reliably act on the moving contact piece. At the same time, the installation position of the moving contact assembly is quickly positioned by utilizing the snap fit between the upper positioning boss on the metal spring piece and the positioning hole of the installation cavity, as well as the sliding fit between the lower positioning boss and the positioning slot, to ensure that the distances that the two ends of the moving contact assembly extend out of the installation cavity are equal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic structural diagram of a rotary switch provided by the present invention;

[0028] Figure 2 A schematic diagram of the internal structure of the housing provided by the present invention;

[0029] Figure 3 for Figure 2 A schematic structural diagram of the housing shown;

[0030] Figure 4 for Figure 2 Schematic diagram of the installation of the rotating shaft shown;

[0031] Figure 5 for Figure 4 A cross-sectional view of the rotating shaft shown;

[0032] Figure 6 for Figure 4 Exploded view of the shaft shown;

[0033] Figure 7 for Figure 4 The schematic diagram of the structure after the rotating shaft hides the arc isolation seat;

[0034] Figure 8 for Figure 4 The structural diagram of the arc isolation seat shown;

[0035] Description of the accompanying drawings:

[0036] 1-housing; 11-movement space; 12-static contact; 13-arc extinguishing cover; 14-permanent magnet; 15-exhaust area; 16-exhaust hole; 17-free plate;

[0037] 2 - rotating shaft; 21 - driving member; 22 - mounting cavity; 221 - positioning hole; 222 - positioning slot; 23 - baffle; 231 - unlocking slot; 24 - synchronization shaft; 241 - U-shaped slot; 25 - synchronization slot; 251 - U-shaped protrusion; 26 - inlet end; 27 - outlet end; 28 - first limiting retaining wall;

[0038] 3-arc isolation seat; 31-slot structure; 32-arc extinguishing groove; 33-slot structure; 34-second limit retaining wall;

[0039] 4-moving contact assembly; 41-clamping opening; 42-limiting protrusion; 43-moving contact piece; 44-metal spring; 45-limiting boss; 46-upper positioning protrusion; 47-lower positioning protrusion;

[0040] 5-connecting structure; 51-clip groove; 52-elastic clip; 53-clearance; 54-guide slope; 55-guide groove. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions of the present invention with reference to the accompanying drawings. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific manner. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0047] The present invention provides Figure 1-8 A rotary switch is shown, comprising:

[0048] A multi-layer shell 1, each layer of the shell 1 is provided with a movement space 11;

[0049] At least two static contacts 12 are arranged in the housing 1 around the movement space 11;

[0050] The rotating shaft 2 is rotatably arranged in the movement space 11, and includes a driving member 21 and an arc isolation seat 3 that are fixedly connected by a connecting structure 5; the driving member 21 includes a mounting cavity 22 that is radially penetrating the driving member 21, and a moving contact assembly 4 that is linked to the driving member 21 through the mounting cavity 22, and two ends of the moving contact assembly 4 are provided with two clamping openings 41 that extend out of the mounting cavity 22 respectively; a slot structure 31 is provided on the arc isolation seat 3, and the outer peripheral side wall of the arc isolation seat 3 is provided with two arc extinguishing grooves 32 for the static contact 12 to extend into; the driving member 21 is plugged and fixed in the slot structure 31, and at least a part of the clamping opening 41 is located in the arc extinguishing groove 32, so that when the rotating shaft 2 rotates, the moving contact assembly 4 is driven to contact and separate with the corresponding static contact 12.

[0051] The above implementation mode is the core technical solution of this embodiment. The moving contact assembly 4 is first inserted and fixed into the installation cavity 22 of the driving member 21, so that the moving contact assembly 4 and the driving member 21 are connected as one, and then the driving member 21 and the arc isolation seat 3 are connected as one through the connecting structure 5. Finally, they are installed into the movement space 11 of the shell 1 together to complete the assembly work. The advantage of this design is that modular installation is achieved through the integrated installation of the driving member 21 and the moving contact assembly 4, which improves the installation speed. In addition, the driving member 21 and the arc isolation seat 3 are arranged through a split installation structure, so that the arc isolation seat 3 can be quickly replaced after wear. At the same time, the arc isolation seat 3 and the driving member 21 can be made of different materials. For example, the driving member 21 uses high-strength materials such as nylon, and the arc isolation seat 3 uses gas-generating materials with improved arc extinguishing performance. This can not only improve the arc extinguishing ability of the contact structure, but also ensure the overall strength of the product and increase the service life of the product.

[0052] As a specific structural setting, the arc isolation seat 3 is also provided with a slot structure 33 that penetrates the slot structure 31 along its radial direction. The slot structure 31 and the slot structure 33 are provided to provide an installation position for the driving member 21 and the moving contact assembly 4. At the same time, the top of the driving member 21 is provided with a baffle 23 that blocks the slot structure 31 and the slot structure 33. The baffle 23 is used to block the slot structure 31 and the slot structure 33, so that a large amount of high-temperature gas generated by the arc burning the arc extinguishing groove 32 will not move toward the top of the rotating shaft 2, but will only move toward the surrounding areas of the rotating shaft 2. At the same time, it also increases the sealing between the two adjacent shells 1 to prevent the arc from moving inside the shell 1.

[0053] The connection structure 5 can be connected to the arc isolation seat 3 by ultrasonic welding, snap connection or riveting. As a preferred embodiment, the connection structure 5 includes two snap grooves 51 respectively provided on the side walls of the driving member 21, and two elastic snaps 52 corresponding to the two snap grooves 51 provided in the slot structure 31. The elastic snaps 52 and the snap grooves 51 are snapped together to make the driving member 21 directly installed and fixed to the arc isolation seat 3 without the need to use other riveting installation methods. The structure is simple and the installation is convenient and quick. A clearance gap 53 is provided between the slot structure 31 and the two elastic clips 52, thereby leaving sufficient deformation space for the elastic clips 52 to avoid damage to the elastic clips 52, and an unlocking groove 231 connected to the clip groove 51 is provided on the baffle 23. When disassembling the arc isolation seat 3, the operator only needs to insert a screwdriver from the unlocking groove 231 into the clip groove 51, and stir the elastic clip 52 to disengage from the clip groove 51, so that the driving member 21 can be separated from the arc isolation seat 3, and the operation is convenient and quick.

[0054] like Figure 7 As shown, a guide structure is further provided between the driving member 21 and the elastic snap 52. The guide structure includes a guide bevel 54 provided on the elastic snap 52 and a guide groove 55 provided on the driving member 21. The guide groove 55 and the snap groove 51 are arranged in sequence along the insertion direction of the elastic snap 52. The sliding fit between the guide groove 55 and the guide bevel 54 reduces the insertion resistance of the elastic snap 52, thereby improving the installation speed.

[0055] As a specific structural setting, the slot structure 31 is at least partially a through hole, the top of the driving member 21 is provided with a synchronization shaft 24, and the bottom of the driving member 21 is provided with a synchronization groove 25; the synchronization shaft 24 of the rotating shaft 2 is inserted into the synchronization groove 25 on the rotating shaft 2 in the adjacent layer of the shell 1 to form a synchronous rotation fit, and through the plug-in fit of the square synchronization shaft 24 and the synchronization groove 25, the operating mechanism of the rotary switch can control multiple groups of rotary switches to synchronously open or close the switch, and at the same time, in order to ensure the safety of multiple groups of rotary switches The installation direction is consistent, and a direction positioning component is further provided between the synchronization shaft 24 and the synchronization groove 25. The direction positioning component includes a U-shaped groove 241 provided on the synchronization shaft 24, and a U-shaped protrusion 251 provided in the synchronization groove 25 corresponding to the U-shaped groove 241. When the synchronization shaft 24 is inserted into the synchronization groove 25, the U-shaped protrusion 251 is snap-fitted and fixed in the U-shaped groove 241. The U-shaped groove 241 and the U-shaped protrusion 251 are used to identify the installation direction to prevent multiple sets of rotary switches from being installed incorrectly or reversely.

[0056] like Figure 6-8 As shown, the two ends of the mounting cavity 22 are respectively an inlet end 26 and an outlet end 27, and a limiting structure is provided between the moving contact assembly 4 and the driving member 21 and the slot structure 31. The limiting structure includes at least one set of limiting protrusions 52 arranged on both sides of the moving contact assembly 4, and a first limiting retaining wall 28 arranged on both sides of the outlet end 27, and a second limiting retaining wall 34 arranged between the slot structure 31 and the slot structure 33 for preventing the limiting protrusion 52 from escaping from the inlet end 26. When the moving contact assembly 4 passes through the outlet end 27, it drives the limiting protrusion 52 and the first limiting retaining wall 28 to move relative to each other. 8 cooperate with each other, and the limiting cooperation between the first limiting baffle 28 and the limiting protrusion 52 is utilized to ensure that the movable contact assembly 4 will not be over-inserted during the process of being inserted into the installation cavity 22, ensuring that the movable contact assembly 4 can be connected to the driving member 21 as a whole to facilitate subsequent modular installation work. At the same time, the limiting protrusion 52 on the movable contact assembly 4 is clamped against the entrance end 26 of the installation cavity 22 by the second limiting baffle 23 to prevent the movable contact assembly 4 from being pulled out from the entrance end 26 when the driving member 21 is fixed in the arc isolation seat 3, thereby improving the safety and reliability of the product during use.

[0057] As a specific structural arrangement, two sets of arc-extinguishing hoods 13 and at least two permanent magnets 14 are provided on the periphery of the motion space 11 along the rotation path of the rotating shaft 2. The two sets of arc-extinguishing hoods 13 are respectively arranged adjacent to the two static contacts 12. The permanent magnets 14 are arranged on the non-opening side surfaces of the arc-extinguishing hoods 13. The permanent magnets 14 are used to attract the arc to move into the arc-extinguishing hoods 13 so that the arc is quickly extinguished by the arc-extinguishing hoods 13, thereby improving the arc extinguishing capability of the product.

[0058] Since the arc generated when the moving and static contacts 12 are separated will burn the inner wall of the arc extinguishing groove 32, and the inner wall of the arc extinguishing groove 32 is made of a gas-generating material, a large amount of gas will be generated when burned by the arc. A large amount of gas will stretch the arc to accelerate the extinguishing speed of the arc. In order to discharge the gas, an exhaust structure is provided between the static contact 12 and the arc extinguishing cover 13. The exhaust structure includes an exhaust area 15 arranged in the shell 1, and an exhaust hole 16 arranged on the side wall of the exhaust area 15 and connected to the outside of the shell 1. The gas is discharged outside the shell 1 through the exhaust area 15 and the exhaust hole 16. At the same time, the de-ionization plate 17 is provided in the exhaust area 15, which can effectively avoid the arc spraying problem of the shell 1 and improve the safety of the product during use.

[0059] like Figure 6As shown, the moving contact assembly 4 includes two moving contact pieces 43 and two metal spring pieces 44, and the two metal spring pieces 44 apply a biasing force to the two moving contact pieces 43 to press each other. The clamping opening 41 is formed between the two moving contact pieces 43, and the moving contact piece 43 is provided with a limiting boss 45 for limiting the two ends of the metal spring piece 44 to ensure that the biasing force applied by the metal spring piece 44 can reliably act on the moving contact piece 43. At the same time, in order to ensure that the installation position of the moving contact assembly 4 will not be deflected, a positioning structure is respectively provided between the two metal spring pieces 44 and the installation cavity 22; the positioning structure includes a positioning hole 221 provided at the top of the installation cavity 22, and an upper positioning protrusion 46 provided on one of the metal spring pieces 44 corresponding to the positioning hole 221, and the upper positioning protrusion 46 is snapped into In the positioning hole 221; the positioning structure also includes a positioning slot 222 arranged at the bottom of the installation cavity 22, and a lower positioning protrusion 47 corresponding to the positioning slot 222 and arranged on the other metal spring 44. The lower positioning protrusion 47 is slidably engaged in the positioning slot 222. The upper positioning protrusion 46 on the metal spring 44 is engaged with the positioning hole 221 of the installation cavity 22, and the lower positioning protrusion 47 is engaged with the positioning slot 222 to quickly locate the installation position of the moving contact assembly 4 to ensure that the distances at both ends of the moving contact assembly 4 extending out of the installation cavity 22 are equal. At the same time, if the moving contact piece 43 is burned out and needs to be replaced, the moving contact assembly 4 can be quickly pulled out of the installation cavity 22 through the positioning slot 22, thereby improving the replacement speed.

[0060] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A rotary switch, characterized in that ,include: A multi-layer shell (1), wherein each layer of the shell (1) is provided with a movement space (11); At least two static contacts (12) are arranged in the housing (1) around the movement space (11); A rotating shaft (2) is rotatably arranged in the motion space (11), and comprises a driving member (21) and an arc-isolating seat (3) which are fixedly connected via a connecting structure (5); the driving member (21) comprises a mounting cavity (22) which is radially penetrating and arranged on the driving member (21); a moving contact assembly (4) which is linked and arranged on the driving member (21) through the mounting cavity (22); two clamping openings (41) which extend out of the mounting cavity (22) are provided at both ends of the moving contact assembly (4); a slotted hole structure (31) is provided on the arc-isolating seat (3), and two arc-extinguishing grooves (32) for the static contact (12) to extend into are provided on the outer peripheral side wall of the arc-isolating seat (3); the driving member (21) is plugged and fixed in the slotted hole structure (31), and at least a portion of the clamping opening (41) is located in the arc-extinguishing groove (32), so that when the rotating shaft (2) rotates, the moving contact assembly (4) is driven to contact and separate with the corresponding static contact (12).

2. The rotary switch according to claim 1, characterized in that The arc isolation seat (3) is further provided with a slot structure (33) that is in communication with the slot hole structure (31) in a radial direction thereof, and a baffle (23) that shields the slot hole structure (31) and the slot structure (33) is provided on the top of the driving member (21).

3. The rotary switch according to claim 2, characterized in that The connecting structure (5) comprises at least two snap-fit ​​grooves (51) provided on the driving member (21), and elastic snap-fits (52) correspondingly provided in the slot structure (31), and a clearance gap (53) is provided between the slot structure (31) and the elastic snap-fits (52).

4. The rotary switch according to claim 3, characterized in that A guide structure is further provided between the driving member (21) and the elastic snap buckle (52), the guide structure comprising a guide slope (54) provided on the elastic snap buckle (52), and a guide groove (55) provided on the driving member (21), the guide groove (55) and the snap buckle groove (51) being arranged in sequence along the insertion direction of the elastic snap buckle (52).

5. The rotary switch according to any one of claims 1 to 4, characterized in that The slot structure (31) is at least partially a through hole; a synchronization shaft (24) is provided on the top of the driving member (21); and a synchronization groove (25) is provided on the bottom of the driving member (21); the synchronization shaft (24) of the rotating shaft (2) is inserted into the synchronization groove (25) on the rotating shaft (2) in the housing (1) of the adjacent layer to form a synchronous rotation fit.

6. The rotary switch according to claim 5, characterized in that A direction positioning component is further provided between the synchronization shaft (24) and the synchronization groove (25), the direction positioning component comprising a U-shaped groove (241) provided on the synchronization shaft (24), and a U-shaped protrusion (251) provided in the synchronization groove (25) corresponding to the U-shaped groove (241); when the synchronization shaft (24) is inserted into the synchronization groove (25), the U-shaped protrusion (251) is clamped and fixed in the U-shaped groove (241).

7. The rotary switch according to claim 2, characterized in that The two ends of the installation cavity (22) are an inlet end (26) and an outlet end (27), respectively; a limiting structure is provided between the movable contact assembly (4), the driving member (21), and the slot structure (31); the limiting structure comprises at least one group of limiting protrusions (42) arranged on both sides of the movable contact assembly (4), a first limiting retaining wall (28) arranged on both sides of the outlet end (27), and a second limiting retaining wall (34) arranged between the slot structure (31) and the slot structure (33) for preventing the limiting protrusion (42) from escaping from the inlet end (26); when the movable contact assembly (4) passes through the outlet end (27), the limiting protrusion (42) is driven to cooperate with and abut against the first limiting retaining wall (28).

8. The rotary switch according to claim 1, characterized in that Two sets of arc extinguishing covers (13) and at least two permanent magnets (14) are provided on the periphery of the movement space (11) along the rotation path of the rotating shaft (2); the two sets of arc extinguishing covers (13) are respectively arranged adjacent to the two static contacts (12); and the permanent magnets (14) are arranged on the non-opening side surfaces of the arc extinguishing covers (13).

9. The rotary switch according to claim 8, characterized in that An exhaust structure is provided between the static contact (12) and the arc extinguishing cover (13), the exhaust structure comprising an exhaust area (15) provided in the housing (1), an exhaust hole (16) provided on a side wall of the exhaust area (15) and communicating with the outside of the housing (1), and an extinguishing plate (17) provided in the exhaust area (15).

10. The rotary switch according to claim 1, characterized in that The movable contact assembly (4) comprises two movable contact pieces (43) and two metal spring pieces (44); the movable contact piece (43) is provided with a limiting boss (45) for limiting the two ends of the metal spring piece (44); a positioning structure is respectively provided between the two metal spring pieces (44) and the mounting cavity (22); the positioning structure comprises a positioning hole (221) provided at the top of the mounting cavity (22), and an upper positioning protrusion (46) provided on one of the metal spring pieces (44) corresponding to the positioning hole (221), the upper positioning protrusion (46) being snapped into the positioning hole (221); the positioning structure further comprises a positioning chute (222) provided at the bottom of the mounting cavity (22), and a lower positioning protrusion (47) provided on the other metal spring piece (44) corresponding to the positioning chute (222), the lower positioning protrusion (47) being slidably snapped into the positioning chute (222).

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