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

Abstract

The utility model 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 utility model relates to the technical field of change-over switch, especially to a three-position change-over switch with self-locking function. BACKGROUND

[0002] The three-position change-over switch is used for switching on the running circuit, grounding the partial circuit and switching on the workshop power circuit, and needs manual operation to realize the conversion of three positions.

[0003] The existing three-position change-over switch is provided with a self-locking assembly, but the existing self-locking assembly and the change-over handle are arranged on the cover plate, and the existing self-locking assembly has a large volume, so that the operation surface of the cover plate is too bulky, and the existing self-locking assembly adopts hand-pulling unlocking, and the user needs to rotate the change-over handle at the same time, so that the unlocking procedure needs to maintain high synchronism, and has certain requirements on the operation proficiency of the user. UTILITY MODEL CONTENTS

[0004] The utility model provides a three-position change-over switch with self-locking function, improves the mechanical movement mode of the self-locking assembly, adds a rebound assembly and a positioning assembly, thereby simplifying the operation mode of unlocking, reducing the volume of the self-locking assembly, finally realizing efficient position conversion of the three-position change-over switch and reducing the operation difficulty of the user.

[0005] To achieve the above object, the utility model provides a three-position change-over switch with self-locking function, which comprises:

[0006] A bearing cover plate;

[0007] Supporting columns are fixedly arranged at the upper ends of the four corners of the bearing cover plate;

[0008] An operation cover plate is fixedly arranged at the upper ends of the supporting columns, the operation cover plate is provided with a terminal interface, a change-over interface and a locking interface, and the lower end surface of the operation cover plate is provided with a first limiting column;

[0009] A self-locking assembly is arranged on the upper end surface of the operation cover plate, and is close to one side of the terminal interface. The self-locking assembly comprises a self-locking knob, a rotating cam, a locking plate and a locking spring. One end of the self-locking knob penetrates the operation cover plate through the locking interface. One end of the self-locking knob is fixedly connected with one end of the rotating cam. The other end of the rotating cam is provided with a fixed pin. One end of the locking plate is provided with a pin hole matched with the fixed pin. The other end of the locking plate is rotationally connected with the lower end surface of the operation cover plate through a rotating shaft. The locking spring is sleeved on the rotating shaft between the locking plate and the operation cover plate. A second limiting column is arranged at the center of the locking plate. The locking spring is matched with the first limiting column and the second limiting column respectively.

[0010] A conversion assembly is arranged on the upper end surface of the operation cover plate, and is close to the self-locking assembly away from the terminal interface.

[0011] A rebound assembly is arranged on the conversion assembly, and is matched with the rotating cam. The rebound assembly is close to the operation cover plate.

[0012] A positioning assembly is arranged on the conversion assembly, and is matched with the locking plate. The positioning assembly is close to the rebound assembly.

[0013] An insulation assembly is connected with the upper end of the operation cover plate at one end, and is connected with the lower end of the bearing cover plate at the other end.

[0014] A communication assembly comprises a switch part and a wiring part. The wiring part is arranged on the insulation assembly. The switch part is arranged on the lower end surface of the bearing cover plate.

[0015] Further, the conversion assembly comprises a conversion arm, a first linkage shaft, a second linkage shaft and a contact shaft. The first linkage shaft penetrates the conversion interface. The first linkage shaft is connected with one end of the conversion arm and one end of the contact shaft at two ends. A plurality of contact protrusions are arranged on the contact shaft. The other end of the contact shaft is connected with one end of the second linkage shaft. The other end of the second linkage shaft penetrates the bearing cover plate.

[0016] Further, the positioning assembly comprises a positioning disc, a positioning column and a positioning seat, the positioning disc comprises a crescent disc and a circular tooth disc, the crescent disc is fixedly connected with the circular tooth disc, a plurality of positioning grooves are arranged on the outer sides of the crescent disc and the circular tooth disc, the circular tooth disc is sleeved on the first linkage shaft, the positioning column is arranged on the lower end surface of the locking plate, the positioning column is matched with the positioning grooves of the circular tooth disc, the positioning seat is arranged on the lower end surface of the operation cover plate, the positioning seat is away from the first linkage shaft, and the positioning seat is matched with the positioning grooves of the crescent disc.

[0017] Further, the rebound assembly comprises a limiting disc and a rebound lever, the limiting disc is sleeved on the first linkage shaft, the limiting disc is located between the positioning disc and the operation cover plate, the limiting disc is provided with a plurality of limiting grooves, limiting ring columns are arranged at the two ends of the rebound lever, the rebound lever is rotationally connected to the lower end surface of the operation cover plate, the limiting ring column at one end of the rebound lever is matched with the rotary cam, and the limiting ring column at the other end of the rebound lever is matched with the limiting groove.

[0018] Further, the insulation assembly comprises a plurality of insulation support frames, one end of the insulation support frame is fixedly connected to the lower end surface of the operation cover plate, and the other end of the insulation support frame is fixedly connected to the upper end surface of the bearing cover plate.

[0019] Further, the wiring part comprises a first wiring piece, a second wiring piece, a third wiring piece, a fourth wiring piece and a fifth wiring piece, the first wiring piece, the second wiring piece, the third wiring piece, the fourth wiring piece and the fifth wiring piece are arranged on a plurality of the insulation support frames, wherein the first wiring piece and the fifth wiring piece are close to the upper end surface of the bearing cover plate, the third wiring piece and the second wiring piece are arranged on the same insulation support frame, the third wiring piece and the fourth wiring piece are close to the lower end surface of the operation cover plate, the second wiring piece is located above the third wiring piece, and the first wiring piece, the second wiring piece, the third wiring piece, the fourth wiring piece and the fifth wiring piece are matched with the contact protrusions.

[0020] Further, the switch part comprises a contact key, a plurality of micro switches and a cable tie seat, the contact key is arranged at the other end of the second linkage shaft, and the plurality of micro switches are matched with the contact key.

[0021] Further, the three-position change-over switch further comprises a connecting plate, and the connecting plate is arranged on the lower end surface of the bearing cover plate.

[0022] Compared with the prior art, the three-position switch with the self-locking function has the advantages that the springback assembly and the positioning assembly matched with the self-locking assembly are arranged, the self-locking and unlocking of the conversion assembly are realized, the self-locking knob of the self-locking assembly controls the rotary cam and the locking plate, the rotary cam is controlled to rotate through the self-locking knob, the rotary cam can control the locking plate and the springback lever of the springback assembly to rotate at the same time, the locking plate is matched with the positioning assembly, the circuit position is correct after the conversion assembly is converted, the springback lever is used for assisting the locking plate to compress the locking spring, the locking spring is prevented from being popped out, and the rotation of the conversion assembly is ensured to be successful. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure first visual angle schematic view of the three-position switch with the self-locking function.

[0024] Figure 2 It is a whole structure second visual angle schematic view of the three-position switch with the self-locking function.

[0025] Figure 3 It is a whole structure third visual angle schematic view of the three-position switch with the self-locking function.

[0026] Figure 4 It is a whole structure fourth visual angle schematic view of the three-position switch with the self-locking function.

[0027] Figure 5 It is a mutual cooperation schematic view of the self-locking assembly, the springback assembly and the positioning assembly in the three-position switch with the self-locking function.

[0028] Figure 6 It is a structure schematic view of the self-locking assembly in the three-position switch with the self-locking function.

[0029] Figure 7 It is a structure schematic view of the self-locking assembly in the three-position switch with the self-locking function.

[0030] Figure 8 It is a structure schematic view of the self-locking assembly in the three-position switch with the self-locking function.

[0031] REFERENCE SIGNS:

[0032] 1000. Bearing cover plate; 1100. Connecting plate;

[0033] 2000. Support column;

[0034] 3000. Operating cover; 3100. Terminal interface; 3200. Conversion interface; 3300. Locking interface; 3400. First limit post; 3500. Operating indicator;

[0035] 4000. Self-locking assembly; 4100. Self-locking knob; 4200. Rotary cam; 4300. Locking plate; 4310. Second limit post; 4400. Locking spring;

[0036] 5000. Conversion assembly; 5100. Conversion arm; 5200. First linkage shaft; 5300. Second linkage shaft; 5400. Contact shaft; 5410. Contact protrusion;

[0037] 6000. Springback assembly; 6100. Limiting plate; 6110. Limiting groove; 6200. Springback lever; 6210. Limiting ring post;

[0038] 7000. Positioning component; 7110. Crescent-shaped disc; 7120. Geared disc; 7130. Positioning groove; 7200. Positioning post; 7300. Positioning seat;

[0039] 8000. Insulation components;

[0040] 9100. Switch section; 9110. Contact key; 9120. Micro switch; 9130. Cable tie holder;

[0041] 9200. Wiring section; 9210. First connector; 9220. Second connector; 9230. Third connector; 9240. Fourth connector; 9250. Fifth connector;

[0042] 9300. Third linkage column. Detailed Implementation

[0043] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0044] like Figures 1-8 As shown, a three-position selector switch with self-locking function provided according to an embodiment of the present utility model includes: a bearing cover plate 1000, an operating cover plate 3000, a self-locking component 4000, a selector component 5000, a spring-loaded component 6000, an insulating component 8000, and a connecting component;

[0045] Support columns 2000 are fixedly installed at the four corners of the upper end of the bearing cover plate 1000, and operating cover plates 3000 are installed at the upper ends of multiple support columns 2000.

[0046] The operating cover 3000 has a terminal interface 3100, a conversion interface 3200 and a locking interface 3300, and a first limit post 3400 is provided at the lower end of the operating cover 3000.

[0047] The self-locking assembly 4000 is arranged on the upper end surface of the operation cover plate 3000, and is close to the terminal interface 3100. The self-locking assembly 4000 comprises a self-locking knob 4100, a rotating cam 4200, a locking plate 4300 and a locking spring 4400. One end of the self-locking knob 4100 penetrates the operation cover plate 3000 through the locking interface 3300, and the one end of the self-locking knob 4100 is fixedly connected with one end of the rotating cam 4200. The other end of the rotating cam 4200 is provided with a fixed pin. One end of the locking plate 4300 is provided with a pin hole matched with the fixed pin. The other end of the locking plate 4300 is rotatably connected with the lower end surface of the operation cover plate 3000 through a rotating shaft. The locking spring 4400 is sleeved on the rotating shaft between the locking plate 4300 and the operation cover plate 3000. The second limiting column 4310 is arranged at the center of the locking plate 4300. The locking spring 4400 is matched with the first limiting column 3400 and the second limiting column 4310 respectively.

[0048] The conversion assembly 5000 is arranged on the upper end surface of the operation cover plate 3000, and is close to the self-locking assembly 4000 and away from the terminal interface 3100.

[0049] The rebound assembly 6000 is arranged on the conversion assembly 5000, and is matched with the rotating cam 4200.

[0050] The communication assembly comprises a switch part 9100 and a wiring part 9200. The wiring part 9200 is arranged on the insulation assembly 8000, and the switch part 9100 is arranged on the lower end surface of the bearing cover plate 1000.

[0051] Wherein, the user in using the three position switch of the utility model to carry out power position conversion, the user needs to operate the self-locking assembly 4000, can operate the conversion assembly 5000, first the user rotates the self-locking knob 4100, the self-locking knob 4100 rotates clockwise, the self-locking knob 4100 drives the rotary cam 4200 to rotate clockwise, the fixed pin at the other end of the rotary cam 4200 drives the locking plate 4300 to rotate, the locking plate 4300 rotates with the pivot as the center, so that the locking plate 4300 is away from the positioning assembly 7000 on the conversion assembly 5000, thereby unlocking the conversion assembly 5000, facilitate the rotation of the conversion assembly 5000, the rotary cam 4200 rotates and drives the rebound assembly 6000 to rotate, so that the rebound assembly 6000 cooperates with the pivot assembly, at this time, the user rotates the conversion assembly 5000 again, after the rotation of the conversion assembly 5000, the conversion assembly 5000 drives the rebound assembly 6000 to move, the rebound assembly 6000 drives the rotary cam 4200 to rotate counterclockwise again, drives the self-locking knob 4100 to restore the initial position, simultaneously drives the locking plate 4300 to rotate clockwise, so that the locking plate 4300 cooperates with the positioning assembly 7000 again, thereby locking the conversion assembly 5000 that completes position conversion, at this time, the circuit in the communication assembly changes.

[0052] Further, as shown in Figure 1 、 Figure 3 and Figure 5 , 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, the first linkage shaft 5200 is connected with the conversion arm 5100 and one end of the contact shaft 5400 at both ends, and a plurality of contact protrusions 5410 are arranged on the contact shaft 5400, the other end of the contact shaft 5400 is connected with one end of the second linkage shaft 5300, and the other end of the second linkage shaft 5300 passes through the bearing cover plate 1000. The user rotates the rotating arm, the rotating arm drives the first linkage shaft 5200 to rotate, and the first linkage shaft 5200 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 correspondingly.

[0053] Further, as shown in Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 8As shown, the positioning assembly 7000 comprises a positioning disc, a positioning column 7200 and a positioning seat 7300, the positioning disc comprises a crescent disc 7110 and a cogwheel disc 7120, the crescent disc 7110 is fixedly connected with the cogwheel disc 7120, a plurality of positioning grooves 7130 are arranged on the outer sides of the crescent disc 7110 and the cogwheel disc 7120, the cogwheel disc 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 is matched with the positioning grooves 7130 of the cogwheel disc 7120, the positioning seat 7300 is arranged on the lower end surface of the operation cover plate 3000, the positioning seat 7300 is away from the first linkage shaft 5200, and the positioning seat 7300 is matched with the positioning grooves 7130 of the crescent disc 7110. Wherein, the positioning column 7200 of the locking plate 4300 is matched with the positioning grooves 7130 on the outer side of the cogwheel disc 7120, the first linkage shaft 5200 is positioned and locked, so that the rotation of the contact shaft 5400 is locked, and then the positioning seat 7300 and the positioning grooves 7130 on the outer side of the crescent disc 7110 are matched to realize the second positioning, so that the self-locking assembly 4000 locks the conversion assembly 5000, and each positioning groove 7130 represents a different switch path position.

[0054] Further, as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 and Figure 8As shown, the rebound assembly 6000 includes a limiting disc 6100 and a rebound lever 6200, the limiting disc 6100 is sleeved on the first linkage shaft 5200, the limiting disc 6100 is located between the positioning disc and the operation cover plate 3000, the limiting disc 6100 is provided with a plurality of limiting grooves 6110, the rebound lever 6200 is provided with a limiting ring column 6210 at both ends, the rebound lever 6200 is rotationally connected to the lower end surface of the operation cover plate 3000, the limiting ring column 6210 at one end of the rebound lever 6200 cooperates with the rotating cam 4200, and the limiting ring column 6210 at the other end of the rebound lever 6200 cooperates with the limiting groove 6110. When the self-locking assembly 4000 is in the 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 disc 6100. When the user operates the self-locking assembly 4000, the self-locking knob 4100 is rotated 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, at the same time the limiting ring column 6210 at the other end of the rebound lever 6200 enters the limiting groove 6110 of the limiting disc 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 compressed between the second limiting column 4310 and the first limiting column 3400, at this time the user rotates the conversion arm 5100 to drive the first linkage shaft 5200 to rotate, the first linkage shaft 5200 simultaneously drives the positioning disc and the limiting disc 6100 to rotate synchronously, the limiting disc 6100 rotates to drive the limiting ring column 6210 at the other end of the rebound lever 6200 to disengage from the limiting groove 6110 and drive the rebound lever 6200 to rotate, so that the limiting ring column 6210 at one end of the rebound lever 6200 pushes the protruding end of the rotating cam 4200 to drive the rotating cam 4200 to rotate, so that the self-locking knob 4100 rotates back to the initial position, 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 cog disc 7120.

[0055] Preferably, as shown in Figure 5 , Figure 7 and Figure 8 , the three-position switch further includes a third linkage column 9300, the two ends of the third linkage column 9300 are fixedly connected with the limiting disc 6100 and the cog disc 7120, to ensure that the limiting disc 6100 and the cog disc 7120 rotate synchronously.

[0056] Further, as shown in Figure 1As shown in the drawings, the insulation assembly 8000 comprises a plurality of insulation support frames, one end of the insulation support frames is fixedly connected to the lower end surface of the operation cover plate 3000, and the other end of the insulation support frames is fixedly connected to the upper end surface of the bearing cover plate 1000. The insulation support frames are secondarily fastened to the operation cover plate 3000 and the bearing cover plate 1000, and the insulation support frames are provided with the wiring part 9200 of the communication assembly.

[0057] Further, as shown in the drawings, Figure 1 , Figure 3 and Figure 4 , the wiring part 9200 comprises a first wiring part 9210, a second wiring part 9220, a third wiring part 9230, a fourth wiring part 9240 and a fifth wiring part 9250, the first wiring part 9210, the second wiring part 9220, the third wiring part 9230, the fourth wiring part 9240 and the fifth wiring part 9250 are all arranged on the plurality of insulation support frames, wherein the first wiring part 9210 and the fifth wiring part 9250 are close to the upper end surface of the bearing cover plate 1000, the third wiring part 9230 and the second wiring part 9220 are arranged on the same insulation support frame, the third wiring part 9230 and the fourth wiring part 9240 are close to the lower end surface of the operation cover plate 3000, the second wiring part 9220 is above the third wiring part 9230, and the first wiring part 9210, the second wiring part 9220, the third wiring part 9230, the fourth wiring part 9240 and the fifth wiring part 9250 are matched with the contact protrusions 5410. When the contact shaft 5400 rotates, the positions of the plurality of contact protrusions 5410 on the contact shaft 5400 change, thereby contacting different wiring parts to communicate different circuits.

[0058] Further, as shown in the drawings, Figure 2 and Figure 3 , the switch part 9100 comprises a contact key 9110, a plurality of micro switches 9120 and a cable 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 are matched 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 is in contact with a single micro switch 9120, when the conversion assembly 5000 rotates, the contact key 9110 rotates synchronously, so that the contact key 9110 is in contact with another micro switch 9120, thereby controlling different circuits, and the cable tie seat 9130 is used for fixedly connecting the wires of the micro switches 9120.

[0059] Further, as shown in the drawings, Figure 2 and Figure 3 , the three-position conversion switch further comprises a connecting plate 1100 arranged on the lower end surface of the bearing cover plate 1000. The connecting plate 1100 is provided with a bolt hole, which facilitates fixing the utility model to a specified position.

[0060] Preferably, as Figure 1 As shown, the three-position switch further comprises operation indicators 3500, and a plurality of operation indicators 3500 are arranged on the upper end surface of the operation cover plate 3000. The operation indicators 3500 facilitate the user to operate the switching assembly 5000.

[0061] In the description of the utility model, it needs to be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" orientation or position relationship are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0062] The utility model has been described by the above related embodiments, however the above embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and refinements made without departing from the spirit and scope of the utility model are all within the scope of the patent protection of the utility model.

Claims

1. A three-position selector switch with a self-locking function, characterized in that, include: Load-bearing cover plate; Support columns are fixedly installed at the four corners of the upper end of the bearing cover plate; An operating cover plate is fixedly installed at the upper end of a plurality of support columns. The operating cover plate has a terminal interface, a conversion interface and a locking interface. A first limiting post is provided on the lower end face of the operating cover plate. A self-locking assembly is disposed on the upper surface of the operating cover, near the terminal interface. The self-locking assembly includes 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 via the locking interface. One end of the self-locking knob is fixedly connected to one end of the rotating cam. A fixing pin is provided at the other end of the rotating cam. One end of the locking plate has a pin hole that engages with the fixing pin. The other end of the locking plate is rotatably connected to the lower surface of the operating cover via a rotating shaft. The locking spring is sleeved on the rotating shaft between the locking plate and the operating cover. A second limiting post is provided at the center of the locking plate. The locking spring engages with both the first and second limiting posts. A conversion component is disposed on the upper surface of the operating cover, the conversion component being closer to the self-locking component and farther from the terminal interface; A spring-back assembly is disposed on the conversion assembly and cooperates with the rotary cam. The spring-back assembly is located near the operating cover plate. A positioning component is disposed on the conversion component, the positioning component is close to the spring-back component, and the positioning component 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 supporting cover plate. A connecting component, comprising a switch portion and a wiring portion, wherein the wiring portion is disposed on the insulating component and the switch portion is disposed on the lower end face of the bearing cover plate.

2. The three-position selector 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. Both ends of the first linkage shaft are connected to the conversion arm and one end of the contact shaft. The contact shaft is provided with multiple contact protrusions. The other end of the contact shaft is connected to one end of the second linkage shaft. The other end of the second linkage shaft passes through the bearing cover plate.

3. The three-position selector switch according to claim 2, characterized in that, The positioning assembly includes a positioning disc, a positioning post, and a positioning seat. The positioning disc includes a crescent-shaped disc and a toothed disc, which are fixedly connected. Multiple positioning grooves are provided on the outer sides of both the crescent-shaped disc and the toothed disc. The toothed disc is sleeved on the first linkage shaft. The positioning post is located on the lower end face of the locking plate and engages with the positioning groove of the toothed disc. The positioning seat is located on the lower end face of the operating cover plate, away from the first linkage shaft, and engages with the positioning groove of the crescent-shaped disc.

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

5. The three-position selector switch according to claim 2, characterized in that, The insulating assembly includes multiple insulating support frames, one end of which is fixedly connected to the lower end face of the operating cover plate, and the other end of which is fixedly connected to the upper end face of the bearing cover plate.

6. The three-position selector switch according to claim 5, characterized in that, The wiring section includes a first connector, a second connector, a third connector, a fourth connector, and a fifth connector. The first connector, the second connector, the third connector, the fourth connector, and the fifth connector are all mounted on multiple insulating support frames. The first connector and the fifth connector are located near the upper surface of the bearing cover plate. The third connector and the second connector are both mounted on the same insulating support frame. The third connector and the fourth connector are both located near the lower surface of the operating cover plate. The second connector is located above the third connector. The first connector, the second connector, the third connector, the fourth connector, and the fifth connector all engage with the contact protrusion.

7. The three-position selector switch according to claim 2, characterized in that, The switching unit includes a contact key, multiple micro switches, and a cable tie holder. The contact key is located at the other end of the second linkage shaft, and the multiple micro switches cooperate with the contact key.

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

Images