Three-position change-over switch with self-locking function

Abstract

The invention relates to the technical field of change-over switches, in particular to a three-position change-over switch with a self-locking function, which comprises a bearing cover plate, a support column; an operation cover plate; the self-locking assembly is arranged on the upper end face of the operation cover plate, and the self-locking assembly comprises a self-locking knob, a rotating cam, a locking plate and a locking spring; the conversion assembly is arranged on the upper end face of the operation cover plate; the springback assembly is arranged on the conversion assembly, and the springback assembly is matched with the rotating cam; the positioning assembly is arranged on the conversion assembly, the positioning assembly is close to the springback assembly, and the positioning assembly is matched with the locking plate; an insulating component; and a communication assembly. The mechanical movement mode of the self-locking assembly is improved, and the springback assembly and the positioning assembly are added, so that the unlocking operation mode is simplified, the size of the self-locking assembly is reduced, efficient position conversion of the three-position conversion switch is finally achieved, and the operation difficulty of a user is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of transfer switches, and in particular to a three-position transfer switch with a self-locking function. Background Art

[0002] The three-position transfer switch is a transfer switch used for connecting the running circuit, grounding part of the circuit and connecting the workshop power circuit. It needs to be manually operated to realize the conversion of the three positions. The three-position transfer switch is used in the traction main circuit or auxiliary circuit of the subway or other equipment. It is used as a safety equipment and has high reliability requirements.

[0003] The existing three-position conversion switches are all provided with self-locking components, but the existing self-locking components and the conversion handle are both arranged on the cover plate, and the existing self-locking components are large in size, which makes the operating surface of the cover plate too bloated. At the same time, the existing self-locking components are unlocked by hand-pull. At the same time, the user is required to synchronously rotate the conversion handle while manually unlocking. Therefore, the unlocking procedure needs to maintain a high degree of synchronization, which has certain requirements on the user's operating proficiency. Summary of the invention

[0004] The present invention provides a three-position conversion switch with a self-locking function, improves the mechanical movement mode of the self-locking component, and adds a rebound component and a positioning component, thereby simplifying the unlocking operation mode and reducing the volume of the self-locking component, ultimately achieving efficient position conversion of the three-position conversion switch and reducing the user's operating difficulty.

[0005] To achieve the above object, the present invention provides a three-position switch with a self-locking function, comprising: Load bearing cover; Support columns, the support columns are fixedly arranged at the four corners of the upper end of the bearing cover plate; An operation cover plate, wherein the upper ends of the plurality of support columns are fixedly provided with the operation cover plate, the operation cover plate is provided with a terminal interface, a conversion interface and a locking interface, and a first limiting column is provided on the lower end surface of the operation cover plate; A self-locking component, wherein the self-locking component is arranged on the upper end surface of the operating cover plate, the self-locking component is close to the side of the terminal interface, the self-locking component comprises a self-locking knob, a rotating cam, a locking plate and a locking spring, one end of the self-locking knob passes through the operating cover plate through the locking interface, one end of the self-locking knob is fixedly connected to one end of the rotating cam, the other end of the rotating cam is provided with a fixing pin, one end of the locking plate is provided with a pin hole to cooperate with the fixing pin, the other end of the locking plate is rotatably connected to the lower end surface of the operating cover plate through a rotating shaft, the locking spring is sleeved on the rotating shaft between the locking plate and the operating cover plate, a second limiting column is provided at the center of the locking plate, and the locking spring cooperates with the first limiting column and the second limiting column respectively; A conversion assembly, the conversion assembly is arranged on the upper end surface of the operation cover, the conversion assembly is close to the self-locking assembly and away from the terminal interface; A rebound component, the rebound component is arranged on the conversion component, the rebound component cooperates with the rotating cam, and the rebound component is close to the operation cover plate; A positioning assembly, the positioning assembly is arranged on the conversion assembly, the positioning assembly is close to the rebound assembly, and the positioning assembly cooperates with the locking plate; an insulating component, one end of which is connected to the upper end of the operating cover plate, and the other end of which is connected to the lower end of the bearing cover plate, A connection component, the connection component includes a switch part and a wiring part, the wiring part is arranged on the insulating component, and the switch part is arranged on the lower end surface of the bearing cover plate.

[0006] Further, the conversion assembly includes a conversion arm, a first linkage shaft, a second linkage shaft and a contact shaft, the first linkage shaft passes through the conversion interface, both ends of the first linkage shaft are connected to the conversion arm and one end of the contact shaft, and a plurality of contact protrusions are arranged on the contact shaft, the other end of the contact shaft is connected to one end of the second linkage shaft, and the other end of the second linkage shaft passes through the bearing cover plate.

[0007] Further, the positioning assembly includes a positioning plate, a positioning column and a positioning seat, the positioning plate includes a crescent plate and a spherical tooth plate, the crescent plate is fixedly connected to the spherical tooth plate, multiple positioning grooves are arranged on the outer sides of the crescent plate and the spherical tooth plate, the spherical tooth plate is sleeved on the first linkage shaft, the positioning column is arranged on the lower end surface of the locking plate, the positioning column cooperates with the positioning groove of the spherical tooth plate, the positioning seat is arranged on the lower end surface of the operating cover plate, the positioning seat is away from the first linkage shaft, and the positioning seat cooperates with the positioning groove of the crescent plate.

[0008] Furthermore, the rebound assembly includes a limit plate and a rebound lever, the limit plate is sleeved on the first linkage shaft, the limit plate is located between the positioning plate and the operating cover plate, the limit plate is provided with a plurality of limit grooves, limit ring columns are provided at both ends of the rebound lever, the rebound lever is rotatably connected to the lower end surface of the operating cover plate, the limit ring column at one end of the rebound lever cooperates with the rotating cam, and the limit ring column at the other end of the rebound lever cooperates with the limit groove.

[0009] Furthermore, the insulating assembly includes a plurality of insulating support frames, one end of each insulating support frame is fixedly connected to the lower end surface of the operating cover plate, and the other end of each insulating support frame is fixedly connected to the upper end surface of the bearing cover plate.

[0010] Further, the wiring portion includes a first wiring member, a second wiring member, a third wiring member, a fourth wiring member and a fifth wiring member, and the first wiring member, the second wiring member, the third wiring member, the fourth wiring member and the fifth wiring member are all arranged on a plurality of insulating support frames, wherein the first wiring member and the fifth wiring member are close to the upper end surface of the bearing cover plate, the third wiring member and the second wiring member are both arranged on the same insulating support frame, the third wiring member and the fourth wiring member are both close to the lower end surface of the operating cover plate, the second wiring member is located above the third wiring member, and the first wiring member, the second wiring member, the third wiring member, the fourth wiring member and the fifth wiring member are all matched with the contact protrusion.

[0011] Furthermore, the switch part includes a contact key, a plurality of micro switches and a tie seat, the contact key is arranged at the other end of the second linkage shaft, and the plurality of micro switches cooperate with the contact key.

[0012] Furthermore, the three-position switch further comprises a connecting plate, and the connecting plate is arranged on the lower end surface of the bearing cover plate.

[0013] Compared with the prior art, a three-position switching switch with a self-locking function according to an embodiment of the present invention realizes self-locking and unlocking of the switching assembly by setting a rebound assembly and a positioning assembly that cooperate with the self-locking assembly, wherein the self-locking knob of the self-locking assembly controls the rotating cam and the locking plate, and the rotating cam is controlled to rotate by the self-locking knob, and the rotating cam can simultaneously control the rotation of the locking plate and the rebound lever of the rebound assembly, so that the locking plate cooperates with the positioning assembly, thereby ensuring that the circuit position is correct after the switching of the switching assembly, and the rebound lever is used to assist the locking plate to compress the locking spring to prevent the locking spring from popping out, thereby ensuring the successful rotation of the switching assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of a three-position switch with a self-locking function according to the present invention from a first viewing angle; Figure 2 It is a schematic diagram showing the overall structure of a three-position switching switch with a self-locking function according to the present invention when flipped from a second viewing angle; Figure 3 It is a schematic diagram showing the overall structure of a three-position switch with a self-locking function according to the present invention when flipped from a third viewing angle; Figure 4 It is a schematic diagram showing the overall structure of a three-position switch with a self-locking function according to the present invention when flipped from a fourth viewing angle; Figure 5 It is a schematic diagram of the cooperation between the self-locking component, the rebound component and the positioning component in a three-position switching switch with a self-locking function of the present invention; Figure 6 It is a structural schematic diagram of a self-locking component in a three-position switch with a self-locking function of the present invention; Figure 7 A schematic structural diagram of an unlocked self-locking component in a three-position switch with a self-locking function according to the present invention; and Figure 8 The present invention is a schematic structural diagram of an unlocked self-locking component in a three-position switch with a self-locking function.

[0015] Reference numerals: 1000. Bearing cover plate; 1100. Connecting plate; 2000. Support column; 3000. Operation cover; 3100. Terminal interface; 3200. Conversion interface; 3300. Locking interface; 3400. First limit column; 3500. Operation indicator plate; 4000. Self-locking assembly; 4100. Self-locking knob; 4200. Rotating cam; 4300. Locking plate; 4310. Second limiting column; 4400. Locking spring; 5000. conversion assembly; 5100. conversion arm; 5200. first linkage shaft; 5300. second linkage shaft; 5400. contact shaft; 5410. contact protrusion; 6000. Rebound assembly; 6100. Limiting plate; 6110. Limiting groove; 6200. Rebound lever; 6210. Limiting ring column; 7000. Positioning assembly; 7110. Crescent disk; 7120. Scalloped disk; 7130. Positioning groove; 7200. Positioning column; 7300. Positioning seat; 8000. Insulation components; 9100. switch unit; 9110. contact key; 9120. micro switch; 9130. cable tie seat; 9200. Wiring part; 9210. First wiring member; 9220. Second wiring member; 9230. Third wiring member; 9240. Fourth wiring member; 9250. Fifth wiring member; 9300. Third linkage column. DETAILED DESCRIPTION

[0016] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0017] like Figure 1-8 As shown, a three-position switch with a self-locking function provided according to an embodiment of the present invention includes: a bearing cover plate 1000, an operating cover plate 3000, a self-locking component 4000, a conversion component 5000, a rebound component 6000, an insulating component 8000 and a connecting component; Support columns 2000 are fixedly arranged at the four corners of the upper end of the bearing cover plate 1000, and an operation cover plate 3000 is arranged at the upper ends of the plurality of support columns 2000; The operation cover 3000 is provided with a terminal interface 3100, a conversion interface 3200 and a locking interface 3300, and a first limiting column 3400 is provided at the lower end of the operation cover 3000; The self-locking component 4000 is arranged on the upper end surface of the operating cover 3000, and the self-locking component 4000 is close to the terminal interface 3100. The self-locking component 4000 includes a self-locking knob 4100, a rotating cam 4200, a locking plate 4300 and a locking spring 4400, wherein one end of the self-locking knob 4100 passes through the locking interface 3300 to penetrate the operating cover 3000, and one end of the self-locking knob 4100 is fixedly connected to one end of the rotating cam 4200, and the rotating cam 4200 is fixedly connected to the terminal interface 3100. A fixing pin is arranged at the other end of the wheel 4200, a pin hole is arranged at one end of the locking plate 4300 to cooperate with the fixing pin, the other end of the locking plate 4300 is rotatably connected with the lower end surface of the operating cover plate 3000 through a rotating shaft, a locking spring 4400 is sleeved on the rotating shaft between the locking plate 4300 and the operating cover plate 3000, a second limiting column 4310 is arranged at the center of the locking plate 4300, and the locking spring 4400 cooperates with the first limiting column 3400 and the second limiting column 4310 respectively; The conversion assembly 5000 is arranged on the upper end surface of the operation cover plate 3000 , and the conversion assembly 5000 is close to the self-locking assembly 4000 and away from the terminal interface 3100 ; The rebound assembly 6000 is disposed on the conversion assembly 5000, and the rebound assembly 6000 cooperates with the rotating cam 4200; The connecting component includes a switch part 9100 and a wiring part 9200 , wherein the wiring part 9200 is arranged on the insulating component 8000 , and the switch part 9100 is arranged on the lower end surface of the bearing cover plate 1000 ; Among them, when the user uses the three-position conversion switch of the present invention to convert the power position, the user needs to operate the self-locking component 4000 to operate the conversion component 5000. First, the user rotates the self-locking knob 4100, and the self-locking knob 4100 rotates clockwise, and the self-locking knob 4100 drives the rotating cam 4200 to rotate clockwise. The fixed pin at the other end of the rotating cam 4200 drives the locking plate 4300 to rotate, and the locking plate 4300 rotates around the rotating shaft, so that the locking plate 4300 is away from the positioning component 7000 on the conversion component 5000, thereby unlocking the conversion component 5000, which is convenient for the conversion component 5000 to rotate. When the rotating cam 4200 rotates, it drives the rebound assembly 6000 to rotate, so that the rebound assembly 6000 cooperates with the rotating shaft assembly. At this time, the user rotates the conversion assembly 5000 again. After the conversion assembly 5000 rotates, the conversion assembly 5000 drives the rebound assembly 6000 to move. The rebound assembly 6000 drives the rotating cam 4200 to rotate counterclockwise, drives the self-locking knob 4100 to restore the initial position, and drives the locking plate 4300 to rotate clockwise at the same time, so that the locking plate 4300 cooperates with the positioning assembly 7000 again, thereby locking the conversion assembly 5000 that completes the position conversion. At this time, the line in the connecting assembly changes.

[0018] Furthermore, if Figure 1 , Figure 3 and Figure 5 As shown, the conversion assembly 5000 includes a conversion arm 5100, a first linkage shaft 5200, a second linkage shaft 5300 and a contact shaft 5400. The first linkage shaft 5200 passes through the conversion interface 3200. Both ends of the first linkage shaft 5200 are connected to the conversion arm 5100 and one end of the contact shaft 5400. A plurality of contact protrusions 5410 are arranged on the contact shaft 5400. The other end of the contact shaft 5400 is connected to one end of the second linkage shaft 5300. The other end of the second linkage shaft 5300 passes through the bearing cover plate 1000. When the user rotates the rotating arm, the rotating arm drives the first linkage shaft 5200 to rotate. The first linkage shaft 5200 then synchronously drives the contact shaft 5400 and the second linkage shaft 5300 to rotate, so that the position of the contact protrusion 5410 on the contact shaft 5400 changes accordingly.

[0019] Furthermore, if Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, the positioning assembly 7000 includes a positioning plate, a positioning column 7200 and a positioning seat 7300. The positioning plate includes a crescent plate 7110 and a round tooth plate 7120. The crescent plate 7110 is fixedly connected to the round tooth plate 7120. Multiple positioning grooves 7130 are arranged on the outer sides of the crescent plate 7110 and the round tooth plate 7120. The round tooth plate 7120 is sleeved on the first linkage shaft 5200. The positioning column 7200 is arranged on the lower end surface of the locking plate 4300. The positioning column 7200 cooperates with the positioning groove 7130 of the round tooth plate 7120. The positioning seat 7300 is arranged on the lower end surface of the operating cover plate 3000. The positioning seat 7300 is away from the first linkage shaft 5200, and the positioning seat 7300 cooperates with the positioning groove 7130 of the crescent plate 7110. Among them, the positioning column 7200 of the locking plate 4300 cooperates with the positioning groove 7130 on the outside of the spherical tooth plate 7120 to realize the positioning and locking of the first linkage shaft 5200, thereby locking the rotation of the contact shaft 5400, and then by setting the positioning seat 7300 and the positioning groove 7130 on the outside of the crescent plate 7110, the second positioning is realized to ensure that the self-locking component 4000 locks the conversion component 5000, wherein each positioning groove 7130 represents a different switch path position.

[0020] Furthermore, if Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, the rebound assembly 6000 includes a limit plate 6100 and a rebound lever 6200. The limit plate 6100 is sleeved on the first linkage shaft 5200. The limit plate 6100 is located between the positioning plate and the operating cover 3000. The limit plate 6100 is provided with a plurality of limit grooves 6110. Limit ring columns 6210 are provided at both ends of the rebound lever 6200. The rebound lever 6200 is rotatably connected to the lower end surface of the operating cover 3000. The limit ring column 6210 at one end of the rebound lever 6200 cooperates with the rotating cam 4200, and the limit ring column 6210 at the other end of the rebound lever 6200 cooperates with the limit groove 6110. When the self-locking assembly 4000 is in a locked state, the limiting ring column 6210 at one end of the rebound lever 6200 does not contact the protruding end of the rotating cam 4200, and the limiting ring column 6210 at the other end of the rebound lever 6200 also does not contact the limiting groove 6110 of the limiting disk 6100. When the user operates the self-locking assembly 4000, the self-locking knob 4100 rotates to the unlocking position. At this time, the protruding end of the rotating cam 4200 will contact the limiting ring column 6210 at one end of the rebound lever 6200, and the limiting ring column 6210 at the other end of the rebound lever 6200 enters the limiting groove 6110 of the limiting disk 6100, and the locking plate 4300 rotates away from the first linkage column to reach the locking position. At this time, the locking spring 4400 is between the second limiting column 4310 and the first limiting column 34 00 is compressed, and at this time the user rotates the conversion arm 5100, driving the first linkage shaft 5200 to rotate, and the first linkage shaft 5200 simultaneously drives the positioning plate and the limit plate 6100 to rotate synchronously, and the limit plate 6100 rotates, synchronously driving the limit ring column 6210 at the other end of the rebound lever 6200 to disengage from the limit groove 6110 and drive the rebound lever 6200 to rotate, so that the limit ring column 6210 at one end of the rebound lever 6200 moves the protruding end of the rotating cam 4200, driving the rotating cam 4200 to rotate, so that the self-locking knob 4100 rotates back to the initial position, and at the same time drives the locking plate 4300 to rotate, and assists the locking spring 4400 to rebound quickly, so that the positioning column 7200 on the locking plate 4300 cooperates with the positioning groove 7130 of the spherical tooth plate 7120.

[0021] Preferably, if Figure 5 , Figure 7 and Figure 8 As shown, the three-position conversion switch also includes a third linkage column 9300, and both ends of the third linkage column 9300 are fixedly connected to the limit plate 6100 and the round tooth plate 7120 to ensure that the limit plate 6100 and the round tooth plate 7120 rotate synchronously.

[0022] Furthermore, if Figure 1As shown, the insulating assembly 8000 includes a plurality of insulating support frames, one end of which is fixedly connected to the lower end surface of the operating cover plate 3000, and the other end of which is fixedly connected to the upper end surface of the bearing cover plate 1000. The insulating support frame is fastened to connect the operating cover plate 3000 and the bearing cover plate 1000 for a second time, and a wiring portion 9200 for connecting the assembly is provided on the insulating support member.

[0023] Furthermore, if Figure 1 , Figure 3 and Figure 4 As shown, the wiring portion 9200 includes a first wiring member 9210, a second wiring member 9220, a third wiring member 9230, a fourth wiring member 9240 and a fifth wiring member 9250, and the first wiring member 9210, the second wiring member 9220, the third wiring member 9230, the fourth wiring member 9240 and the fifth wiring member 9250 are all arranged on multiple insulating support frames, wherein the first wiring member 9210 and the fifth wiring member 9250 are close to the upper end surface of the bearing cover 1000, the third wiring member 9230 and the second wiring member 9220 are both arranged on the same insulating support frame, the third wiring member 9230 and the fourth wiring member 9240 are both close to the lower end surface of the operating cover 3000, the second wiring member 9220 is located above the third wiring member 9230, and the first wiring member 9210, the second wiring member 9220, the third wiring member 9230, the fourth wiring member 9240 and the fifth wiring member 9250 are all matched with the contact protrusion 5410. When the contact shaft 5400 rotates, the positions of the multiple contact protrusions 5410 on the contact shaft 5400 change, thereby contacting different wiring members, thereby connecting different circuits.

[0024] Furthermore, if Figure 2 and Figure 3 As shown, the switch part 9100 includes a contact key 9110, a plurality of micro switches 9120 and a tie seat 9130. The contact key 9110 is arranged at the other end of the second linkage shaft 5300, and the plurality of micro switches 9120 cooperate with the contact key 9110. The current passes through the contact column and is conducted to the contact key 9110 through the second linkage column. The contact key 9110 contacts a single micro switch 9120. When the conversion assembly 5000 is rotated, the contact key 9110 rotates synchronously, so that the contact key 9110 contacts another micro switch 9120, thereby controlling different circuits, and the tie seat 9130 is used to fix the wires connected to the micro switches 9120.

[0025] Furthermore, if Figure 2 and Figure 3 As shown, the three-position switch further comprises a connecting plate 1100, which is arranged on the lower end surface of the bearing cover plate 1000. Bolt holes are arranged on the connecting plate 1100 to facilitate fixing the present invention to a designated position.

[0026] Preferably, if Figure 1 As shown, the three-position switch further includes an operation indicator 3500 , and a plurality of operation indicator signs 3500 are arranged on the upper end surface of the operation cover plate 3000 . The operation indicator signs 3500 facilitate the user to operate the conversion assembly 5000 .

[0027] In the description of the present invention, it is necessary to understand that the terms “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” orientations or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0028] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention. Operation cover Operation cover.

Claims

1. A three-position switch with self-locking function, characterized in that: include: Load bearing cover; Support columns, the support columns are fixedly arranged at the four corners of the upper end of the bearing cover plate; An operation cover plate, wherein the upper ends of the plurality of support columns are fixedly provided with the operation cover plate, the operation cover plate is provided with a terminal interface, a conversion interface and a locking interface, and a first limiting column is provided on the lower end surface of the operation cover plate; A self-locking component, wherein the self-locking component is arranged on the upper end surface of the operating cover plate, the self-locking component is close to the side of the terminal interface, the self-locking component comprises a self-locking knob, a rotating cam, a locking plate and a locking spring, one end of the self-locking knob passes through the operating cover plate through the locking interface, one end of the self-locking knob is fixedly connected to one end of the rotating cam, the other end of the rotating cam is provided with a fixing pin, one end of the locking plate is provided with a pin hole to cooperate with the fixing pin, the other end of the locking plate is rotatably connected to the lower end surface of the operating cover plate through a rotating shaft, the locking spring is sleeved on the rotating shaft between the locking plate and the operating cover plate, a second limiting column is provided at the center of the locking plate, and the locking spring cooperates with the first limiting column and the second limiting column respectively; A conversion assembly, the conversion assembly is arranged on the upper end surface of the operation cover, the conversion assembly is close to the self-locking assembly and away from the terminal interface; A rebound component, the rebound component is arranged on the conversion component, the rebound component cooperates with the rotating cam, and the rebound component is close to the operation cover plate; A positioning assembly, the positioning assembly is arranged on the conversion assembly, the positioning assembly is close to the rebound assembly, and the positioning assembly cooperates with the locking plate; an insulating component, one end of which is connected to the upper end of the operating cover plate, and the other end of which is connected to the lower end of the bearing cover plate, A connection component, the connection component includes a switch part and a wiring part, the wiring part is arranged on the insulating component, and the switch part is arranged on the lower end surface of the bearing cover plate.

2. The three-position switch according to claim 1, characterized in that: The conversion assembly includes a conversion arm, a first linkage shaft, a second linkage shaft and a contact shaft, the first linkage shaft passes through the conversion interface, two ends of the first linkage shaft are connected to the conversion arm and one end of the contact shaft, and a plurality of contact protrusions are arranged on the contact shaft, the other end of the contact shaft is connected to one end of the second linkage shaft, and the other end of the second linkage shaft passes through the bearing cover plate.

3. The three-position switch according to claim 2, characterized in that: The positioning assembly includes a positioning plate, a positioning column and a positioning seat. The positioning plate includes a crescent plate and a spherical tooth plate. The crescent plate is fixedly connected to the spherical tooth plate. Multiple positioning grooves are arranged on the outer sides of the crescent plate and the spherical tooth plate. The spherical tooth plate is sleeved on the first linkage shaft. The positioning column is arranged on the lower end surface of the locking plate. The positioning column cooperates with the positioning groove of the spherical tooth plate. The positioning seat is arranged on the lower end surface of the operating cover plate. The positioning seat is away from the first linkage shaft, and the positioning seat cooperates with the positioning groove of the crescent plate.

4. The three-position switch according to claim 3, characterized in that: The rebound assembly includes a limit plate and a rebound lever, the limit plate is sleeved on the first linkage shaft, the limit plate is located between the positioning plate and the operating cover, the limit plate is provided with a plurality of limit grooves, limit ring columns are provided at both ends of the rebound lever, the rebound lever is rotatably connected to the lower end surface of the operating cover, the limit ring column at one end of the rebound lever cooperates with the rotating cam, and the limit ring column at the other end of the rebound lever cooperates with the limit groove.

5. The three-position switch according to claim 2, characterized in that: The insulating assembly includes a plurality of insulating support frames, one end of each insulating support frame is fixedly connected to the lower end surface of the operating cover plate, and the other end of each insulating support frame is fixedly connected to the upper end surface of the bearing cover plate.

6. The three-position switch according to claim 5, characterized in that: The wiring portion includes a first wiring member, a second wiring member, a third wiring member, a fourth wiring member and a fifth wiring member, wherein the first wiring member, the second wiring member, the third wiring member, the fourth wiring member and the fifth wiring member are all arranged on a plurality of insulating support frames, wherein the first wiring member and the fifth wiring member are close to the upper end surface of the bearing cover plate, the third wiring member and the second wiring member are both arranged on the same insulating support frame, the third wiring member and the fourth wiring member are both close to the lower end surface of the operating cover plate, the second wiring member is located above the third wiring member, and the first wiring member, the second wiring member, the third wiring member, the fourth wiring member and the fifth wiring member are all matched with the contact protrusion.

7. The three-position switch according to claim 2, characterized in that: The switch part comprises a contact key, a plurality of micro switches and a tie seat, the contact key is arranged at the other end of the second linkage shaft, and the plurality of micro switches cooperate with the contact key.

8. The three-position switch according to claim 1, characterized in that: It also includes a connecting plate, which is arranged on the lower end surface of the bearing cover plate.

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