Clearance-driven torsion spring operating mechanism and three-position switch

Abstract

The utility model relates to a gap-driven torsion spring operating mechanism and a three-position switch, the gap-driven torsion spring operating mechanism comprises an output shaft, a driving disc, an operating shaft and a limiting assembly, the operating shaft is used for connecting a torsion spring assembly of the three-position switch, and the output shaft is used for driving a disconnecting link of the three-position switch to rotate to realize closing and opening. A shaft sleeve used for power transmission is arranged in the middle of the transmission disc, a connecting hole is formed in the middle of the shaft sleeve, a spline groove is formed in the connecting hole, a spline matched with the spline groove is arranged at the position, close to the front end, of the output shaft, the output shaft is connected with the transmission disc through the spline, and a small spline is arranged at the position, close to the rear end, of the operation shaft. The central angle of the small spline is alpha degrees smaller than that of a spline groove in the transmission disc, a limiting groove is formed in the periphery of the transmission disc, the limiting assembly is arranged on a rear assembly plate of the three-position switch, and a limiting piece of the limiting assembly corresponds to the limiting groove. According to the utility model, the operation of the three-position switch is smoother, and the problem that the torque of the torsion spring assembly is insufficient when the three-position switch is operated is solved.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, and in particular to a gap-driven torsion spring operating mechanism and a three-position switch. Background Technology

[0002] A three-position switch refers to a switch with a closed position, an isolated position, and a grounded position. In the closed position, the main contact is closed, and the circuit is closed. In the isolated position, the main contact is open, and the circuit is isolated, but grounding is still possible. In the grounded position, the circuit is grounded, ensuring safety. In the prior art, the output shaft of a three-position switch is operated through a torsion spring energy storage mechanism within the operating mechanism. For example, patent document CN204905076U discloses a three-position module for a solid-insulated cabinet, in which energy is stored through a torsion spring assembly on the main shaft to achieve switching operations between the three positions of the three-position switch. The disadvantage of this approach is that if the energy stored in the torsion spring is too large, it will cause significant vibration during the closing and opening operations of the circuit breaker, affecting the service life of the mechanism. If the energy stored in the torsion spring is insufficient, the torque provided by the torsion spring to the output shaft during opening will not be able to separate the switch blade from the blade head, affecting the switching function. Especially after a long closing operation time, the friction between the switch blade and the blade head is large, and the torque required to achieve smooth opening is large. The energy stored in the existing torsion spring energy storage mechanism is often insufficient to achieve smooth opening. Therefore, it is necessary to improve the existing three-position switch to ensure smooth operation of the three-position switch. Summary of the Invention

[0003] The first objective of this invention is to address the problem described in the background art that the torque provided by the torsion spring energy storage mechanism is insufficient to achieve smooth opening of the existing three-position switch during the opening process, and to provide a gap-driven torsion spring operating mechanism that can solve the aforementioned problem.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a torsion spring operating mechanism with intermittent drive, comprising an output shaft, a transmission disk, an operating shaft, and a limiting assembly. The operating shaft connects to the torsion spring assembly of a three-position switch, and the output shaft drives the knife switch of the three-position switch to rotate, thereby achieving closing and opening. A bushing for power transmission is provided in the middle of the transmission disk, and a connecting hole is provided in the middle of the bushing. A spline groove is provided in the connecting hole. A spline matching the spline groove is provided near the front end of the output shaft. The output shaft is connected to the transmission disk via a spline. A small... The spline, with the smaller spline having a central angle α° smaller than the spline groove on the transmission disc, has a limiting groove on its outer circumference. The limiting component is mounted on the rear assembly plate of the three-position switch, with the limiting element of the limiting component corresponding to the limiting groove. The position of the limiting groove on the transmission disc corresponds to the isolation position of the three-position switch. The transmission disc has an arc-shaped limiting groove, and the rear assembly plate of the three-position switch has a limiting post that passes through the arc-shaped limiting groove. The limiting post can limit the rotation angle of the transmission disc. The positions of the two ends of the arc-shaped limiting groove on the transmission disc correspond to the closed position and the connected position of the three-position switch, respectively.

[0005] In the above scheme, the limiting assembly includes a mounting shaft, a crank arm, a limiting member, and a rotating spring. The mounting shaft is fixedly connected to the rear mounting plate of the three-position switch. One end of the crank arm is rotatably connected to the mounting shaft. The limiting member is located at the other end of the crank arm, and its position corresponds to the position of the limiting groove on the transmission disk. The rotating spring is located on the mounting shaft and applies torque to the crank arm, causing the limiting member to press against the outer circumference of the transmission disk. With this configuration, when the limiting member of the limiting assembly engages with the limiting groove on the transmission disk, it can limit the transmission disk. This configuration, through the rotating spring, provides the necessary elastic force to the crank arm, allowing the limiting member to move along the outer circumference of the transmission disk. When the limiting member is aligned with the limiting groove, it can enter the limiting groove to form a limiting position.

[0006] In the above scheme, the limiting component is a roller, the limiting groove is a curved groove with an arc that matches the arc of the roller, and the rotating spring is a torsion spring. One free end of the torsion spring presses against the side of the crank arm away from the transmission disc, while the other free end rests against a positioning post next to the mounting shaft. This arrangement allows the limiting component to move along the outer circumference of the transmission disc. When the limiting groove on the transmission disc aligns with the position of the limiting component, the limiting component can enter the limiting groove to form a limiting position. Using a roller as the limiting component reduces friction during relative rotation between the limiting component and the transmission disc, thus minimizing wear.

[0007] In the above scheme, a cam is provided on the operating shaft, and the cam is fixedly connected to the operating shaft. The protruding part of the cam corresponds to the position of the limiting member. With this arrangement, when the operating shaft starts to rotate, it can drive the cam to rotate accordingly. The protruding part of the cam can push the limiting member to move, causing the limiting member to leave the limiting groove, thereby assisting in releasing the limiting member from the limiting groove. By setting the cam, when moving from the isolation position, the limiting member is in the limiting groove. When moving from the isolation position to the closing position or the contact position, the cam starts to rotate with the rotation of the operating shaft. The protruding part of the cam can push the limiting member to leave the limiting groove. When the small spline of the operating shaft contacts the spline sidewall on the transmission plate, the limiting member just disengages from the limiting groove. This arrangement can reduce the resistance when the operating shaft drives the transmission plate to rotate from a stationary state, making the operation of the three-position switch smoother.

[0008] In the above scheme, two limiting grooves are provided on the outer periphery of the transmission disk, which are respectively located at the upper and lower parts of the transmission disk. Two sets of limiting components are provided on the rear mounting plate of the three-position switch, with the positions of the two sets of limiting components corresponding to the positions of the two limiting grooves. Through this arrangement, the two sets of limiting components can limit the transmission disk in both the forward and reverse rotation directions.

[0009] In the above scheme, one side of the limiting groove is a steep slope to restrict the roller from leaving the limiting groove, and the other side of the limiting groove is a gentle slope that allows the roller to leave smoothly. The steep slope and gentle slope of the two limiting grooves are set in opposite directions. With this arrangement, each combination of limiting groove and limiting member can limit movement in only one direction. The two sets of limiting members can limit the forward and reverse rotation of the transmission disc, respectively.

[0010] The second objective of this invention is to provide a three-position switch that utilizes the aforementioned gap-driven torsion spring operating mechanism, which has the aforementioned gap-driven torsion spring operating mechanism.

[0011] This utility model has the following positive effects: 1) In the gap-driven torsion spring operating mechanism of this utility model, the operating shaft of the three-position switch is not directly connected to the output shaft, but the torque is transmitted through the transmission disk. The transmission disk and the output shaft are connected by a spline, and the operating shaft is provided with a small spline. The central angle of the small spline is smaller than that of the spline groove on the transmission disk by α°. α° can be set according to design requirements. With this setting, when the three-position switch performs a closing or opening operation, the operating shaft needs to rotate at an angle first. During this process, the rotation of the operating shaft can be increased to a higher speed. Then, its inertia helps to drive the transmission disk and the output shaft to rotate. When driving the output shaft to rotate, it already has a certain speed, so it is easier to drive the knife switch to rotate through the output shaft to realize the closing and opening operation of the three-position switch. At the same time, it can reduce the force requirement of the energy storage spring of the three-position switch, reduce the vibration during the operation of the mechanism, and extend the service life of the three-position switch. 2) The gap-driven torsion spring operating mechanism of this utility model, by setting an arc-shaped limiting groove on the transmission disc and setting a limiting post on the rear assembly plate of the three-position switch, can limit the rotation angle of the transmission disc, thereby limiting the rotation angle of the output shaft, so that when the transmission disc rotates to the closed position or the contact position, it can stop rotating, so that the knife switch can be accurately stopped at the predetermined position. 3) The gap-driven torsion spring operating mechanism of this utility model, by setting a limiting component, when the transmission disc rotates to the isolation position, the limiting component engages with the limiting groove, so that the transmission disc stops at the isolation position, so that the knife switch can be accurately stopped at the predetermined position. When the three-position switch is rotated from the isolating position to the closing or grounding position, the limiting component of the limiting assembly and the limiting groove of the transmission disk are initially engaged. There is a certain angle gap between the small spline of the operating shaft and the spline sidewall of the transmission disk. When the operating shaft starts to rotate, it will not immediately drive the transmission disk to rotate. Only when the small spline on the operating shaft abuts against the spline sidewall of the transmission disk will the transmission disk start to rotate. This setting makes the closing or grounding operation smoother. 4) The gap-driven torsion spring operating mechanism of this utility model, by setting the limiting assembly, when the three-position switch is rotated to the isolating position, the operating shaft first rotates to the predetermined position and stops rotating. The transmission disk will rotate under the elastic force of the limiting assembly until the limiting component and the limiting groove are fully engaged before stopping rotating. This makes the small spline on the operating shaft and the spline on the transmission disk spaced at a certain angle to facilitate the subsequent closing or grounding operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the gap-driven torsion spring operating mechanism of this utility model.

[0013] Figure 2 This is a schematic diagram of the assembly structure of the gap-driven torsion spring operating mechanism of this utility model on a three-position switch.

[0014] Figure 3This is a schematic diagram of the rear assembly structure of the gap-driven torsion spring operating mechanism of this utility model on a three-position switch.

[0015] Figure 4 This is a schematic diagram of the rear structure of the gap-driven torsion spring operating mechanism of this utility model (output shaft removed).

[0016] Figure 5 This is a schematic diagram of the front structure of the gap-driven torsion spring operating mechanism of this utility model (with the operating shaft removed).

[0017] Figure 6 This is a schematic diagram of the front structure of the gap-driven torsion spring operating mechanism of this utility model (cam removed).

[0018] The reference numerals in the figure are as follows: output shaft 1, transmission disc 2, bushing 21, spline groove 22, limit groove 23, steep slope 24, gentle slope 25, arc-shaped limit groove 26, operating shaft 3, small spline 31, limit assembly 4, mounting shaft 41, crank arm 42, limit piece 43, rotating spring 44, limit post 5, cam 6, protruding part 61, three-position switch 7, rear assembly plate 71, torsion spring assembly 72. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1-5 The illustrated gap-driven torsion spring operating mechanism includes an output shaft 1, a transmission disk 2, an operating shaft 3, and a limiting component 4.

[0021] like Figure 1 and 6 As shown, the operating shaft 3 can be a long strip of metal, with a small spline 31 on the outer wall of its rear end. The front end of the operating shaft 3 is fixedly connected to the torsion spring assembly 72 of the three-position switch 7. The structure of the torsion spring assembly 72 of the three-position switch 7 can adopt the structure of the torsion spring assembly of the three-position module in the patent document with publication number CN204905076U. The operating shaft 3 corresponds to the first half of the main shaft in this patent solution, and the output shaft 1 corresponds to the second half of the main shaft.

[0022] like Figure 1 and 3 As shown, the output shaft 1 can be a long strip of metal. The rear end of the output shaft 1 is used to drive the knife switch 7 of the three-position switch to rotate to achieve closing and opening. A spline is provided on the outer wall of the front end of the output shaft 1.

[0023] like Figure 1-6 As shown, the transmission disc 2 is a disc-shaped metal part. A bushing 21 for power transmission is provided in the middle of the transmission disc 2. A connecting hole is provided in the middle of the bushing 21, and a spline groove 22 is provided in the connecting hole. The spline on the output shaft 1 matches the spline in the bushing 21. The small spline 31 on the operating shaft 3 has a central angle α° smaller than the spline groove on the transmission disc 2, as shown in the attached figure. Figure 4 As shown, in the bushing 21, four sets of spline grooves 22 are distributed along the wall of the connecting hole, such as... Figure 1 As shown, four sets of splines are also provided on the output shaft 1, and the central angles of the four sets of splines on the output shaft 1 are exactly the same as those of the spline groove 22 on the bushing 21. Figure 4 and 6 As shown, four sets of small splines 31 are provided on the operating shaft 3. The four sets of small splines 31 are respectively inserted into the four spline grooves 22 on the bushing 21. However, the central angle of the small spline 31 groove is 7° smaller than the central angle of the spline groove 22.

[0024] like Figure 1-6 As shown, a limiting groove 23 is provided on the outer periphery of the transmission disk 2. The position of the limiting groove 23 on the transmission disk 2 corresponds to the isolation position of the three-position switch. The shape and number of the limiting groove 23 can be set as needed, for example, one limiting groove 23 or two limiting grooves 23 can be set. As a preferred embodiment, two limiting grooves 23 are provided on the outer periphery of the transmission disk 2. The two limiting grooves 23 are respectively set on the upper and lower parts of the transmission disk 2. One side of the limiting groove 23 is a steep slope 24 for restricting the roller from leaving the limiting groove, and the other side of the limiting groove 23 is a gentle slope 25 for the roller to leave smoothly. The steep slope 24 and gentle slope 25 of the two limiting grooves 23 are set in opposite directions. With this arrangement, each combination of limiting groove 23 and limiting member 4 can limit the transmission disk in only one direction. The two sets of limiting members can limit the forward and reverse rotation directions of the transmission disk respectively.

[0025] like Figure 4 As shown, in order to ensure that the output shaft 1 of the three-position switch 7 can accurately stop at the predetermined position during closing or grounding operations, an arc-shaped limiting groove 26 is provided on the transmission disk 2, and a limiting post 5 is provided on the rear assembly plate 71 of the three-position switch 7. The limiting post 5 passes through the arc-shaped limiting groove 26, and the rotation angle of the transmission disk 2 can be limited by the limiting post 5. The positions of the two ends of the arc-shaped limiting groove 26 on the transmission disk 2 correspond to the closing position and the grounding position of the three-position switch 7, respectively.

[0026] like Figure 1-6As shown, the limiting components 4 are mounted on the rear assembly plate 71 of the three-position switch 7. The position and number of the limiting components 4 correspond to the position and number of the limiting slots 23 on the transmission disc 2, respectively. For example, if there is one limiting slot on the transmission disc, only one set of limiting components is provided on the rear assembly plate of the three-position switch, and the position of the limiting components corresponds to the position of the limiting slot. If there are two limiting slots on the transmission disc, two sets of limiting components are provided on the rear assembly plate of the three-position switch, and the positions of the two sets of limiting components correspond to the positions of the two limiting slots, respectively.

[0027] like Figure 4-6 As shown, the limiting assembly 4 includes a mounting shaft 41, a crank arm 42, a limiting member 43, and a rotating spring 44. The mounting shaft 41 is fixedly connected to the rear mounting plate 71 of the three-position switch 7. One end of the crank arm 42 is rotatably connected to the mounting shaft 41. The limiting member 43 is located at the other end of the crank arm 42, and its position corresponds to the position of the limiting groove 23 on the transmission disk 2. The rotating spring 44 is located on the mounting shaft 41 and applies torque to the crank arm 42, causing the limiting member 43 to press against the outer periphery of the transmission disk 2. With this configuration, when the limiting member 43 of the limiting assembly 4 engages with the limiting groove 23 on the transmission disk 2, it can limit the transmission disk 2. With this configuration, the rotating spring 44 can provide the required elastic force to the crank arm 42, allowing the limiting member 43 to move along the outer periphery of the transmission disk 2. When the limiting member 43 is directly aligned with the limiting groove 23, the limiting member 43 can enter the limiting groove 23 to form a limit.

[0028] In a preferred embodiment, the limiting member 43 is a roller, and the limiting groove 23 is a curved groove with an arc that matches the arc of the roller. The rotating spring 44 is a torsion spring, with one free end pressing against the side of the crank arm 42 away from the transmission disk 2, and the other free end resting on a positioning post next to the mounting shaft 41. This arrangement allows the roller to move along the outer circumference of the transmission disk 2. When the limiting groove 23 on the transmission disk 2 is aligned with the roller, the roller can enter the limiting groove 23 to form a limiting position. Using a roller as the limiting member reduces friction during relative rotation between the limiting member and the transmission disk, thus minimizing wear.

[0029] like Figure 5As shown, in a preferred embodiment, the operating shaft 3 is provided with a cam 6, which is fixedly connected to the operating shaft 3. The cam 6 has a spline hole in its center, which matches the small spline 31 on the operating shaft 3. The protruding part 61 of the cam 6 corresponds to the position of the limiting member 43. With this arrangement, when the operating shaft 3 starts to rotate, it drives the cam 6 to rotate accordingly. The protruding part 61 of the cam 6 can push the limiting member 43 to move, causing the limiting member 43 to leave the limiting groove 23, thereby assisting in releasing the limiting member 43 from the limiting groove 23. By setting cam 6, when in the isolation position, the limiting member is in the limiting groove. When it is to switch from the isolation position to the closing position or the contact position, cam 6 starts to rotate with the rotation of the operating shaft 3. The protruding part of cam 6 can push the limiting member 43 away from the limiting groove 23. When the small spline 31 of the operating shaft 3 contacts the spline side wall on the transmission disk 2, the limiting member 43 just disengages from the limiting groove 23. Through this setting, the resistance when the operating shaft 3 drives the transmission disk 2 to start rotating from a stationary state can be reduced, making the operation of the three-position switch smoother.

[0030] The gap-driven torsion spring operating mechanism of this invention can be used for power transmission between the operating shaft and output shaft of a three-position switch in the prior art, making the operation of the three-position switch smoother.

[0031] The intermittent-driven torsion spring operating mechanism of this utility model operates on the same principle as the existing three-position switch. The difference is that when operating the three-position switch, energy is stored through the torsion spring assembly. When the energy storage is complete, the torsion spring disengages and drives the operating shaft to rotate. The small spline on the operating shaft is at a certain angle smaller than the spline groove on the transmission disk. The operating shaft will rotate first until it hits one side wall of the spline groove, at which point it can drive the transmission disk to rotate. Therefore, the operating shaft has a certain speed and initial momentum when it drives the transmission disk to rotate, making it easier to drive the transmission disk and output shaft to rotate, thus realizing the separation of the knife switch and the switch head in the three positions.

[0032] The gap-driven torsion spring operating mechanism of this utility model has an arc-shaped limiting groove on the transmission disc and a limiting post on the rear assembly plate of the three-position switch. The limiting post can limit the rotation angle of the transmission disc, thereby limiting the rotation angle of the output shaft, so that when the transmission disc rotates to the closed position or the contact position, it can stop rotating, so that the knife switch can be accurately stopped at the predetermined position.

[0033] The gap-driven torsion spring operating mechanism of this utility model has a limiting groove on the transmission plate and a limiting component on the rear assembly plate of the three-position switch. When the three-position switch is rotated to the isolation position, the operating shaft first rotates to the predetermined position. After the operating shaft stops rotating, the transmission plate will continue to rotate under the inertia of the knife switch and the elastic force of the limiting component until the limiting component and the limiting groove are fully engaged. This ensures that the small spline on the operating shaft and the spline on the transmission plate are spaced at a certain angle, so that the small spline on the operating shaft stops exactly in the middle position of the spline groove on the transmission plate, that is, the small spline and the groove wall of the spline groove are spaced at an angle of α / 2, so as to facilitate subsequent closing or grounding operations.

[0034] The gap-driven torsion spring operating mechanism of this utility model, during isolation operation, when the transmission disc rotates to the point where the limiting groove and the limiting member are exactly aligned, the limiting member enters the limiting groove, allowing the transmission disc to stop accurately in the isolation position, and the knife switch to stop accurately in the predetermined position. However, when the three-position switch is in the isolation position for closing or grounding operations, the limiting member of the limiting assembly and the limiting groove of the transmission disc are initially engaged. There is a certain angle gap between the small spline of the operating shaft and the spline sidewall of the transmission disc. When the operating shaft starts to rotate, it does not immediately drive the transmission disc to rotate; the operating shaft has an unloaded idle stroke, allowing its speed to increase rapidly. Only when the small spline on the operating shaft abuts against the spline sidewall of the transmission disc will it drive the transmission disc to start rotating. Utilizing the rotational inertia of the operating shaft assists in making the closing or grounding operation smoother.

[0035] The gap-driven torsion spring operating mechanism of this invention is applied to a three-position switch. It allows the operating shaft of the three-position switch to have a rapid acceleration idle stroke when it starts to rotate. After the speed increases, inertia is used to help open the circuit. This setting can reduce the force of the energy storage spring of the mechanism and extend the service life of the mechanism.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the scope and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsion spring operating mechanism driven by a gap, characterized in that: The system includes an output shaft, a transmission disc, an operating shaft, and a limit assembly. The operating shaft connects to the torsion spring assembly of the three-position switch. The output shaft drives the knife switch of the three-position switch to rotate, achieving closing and opening. A bushing for power transmission is located in the middle of the transmission disc, with a connecting hole in the middle and a spline groove within the connecting hole. Near the front end of the output shaft, a spline matching the spline groove is provided, connecting the output shaft and the transmission disc via a spline. Near the rear end of the operating shaft, a small spline is provided, with a central angle smaller than that of the spline groove on the transmission disc. α°, a limiting groove is provided on the outer periphery of the transmission disk, and the limiting component is set on the rear assembly plate of the three-position switch. The limiting component of the limiting component corresponds to the limiting groove. The position of the limiting groove on the transmission disk corresponds to the isolation position of the three-position switch. The transmission disk is provided with an arc-shaped limiting groove, and a limiting post is provided on the rear assembly plate of the three-position switch. The limiting post passes through the arc-shaped limiting groove and can limit the rotation angle of the transmission disk. The positions of the two ends of the arc-shaped limiting groove on the transmission disk correspond to the closed position and the connected position of the three-position switch, respectively.

2. The gap-driven torsion spring operating mechanism according to claim 1, characterized in that: The limiting assembly includes a mounting shaft, a crank arm, a limiting component, and a rotating spring. The mounting shaft is fixedly connected to the rear assembly plate of the three-position switch. One end of the crank arm is rotatably connected to the mounting shaft. The limiting component is located at the other end of the crank arm, and its position corresponds to the position of the limiting groove on the transmission disk. The rotating spring is located on the mounting shaft and is used to apply torque to the crank arm, so that the limiting component presses against the outer periphery of the transmission disk.

3. The gap-driven torsion spring operating mechanism according to claim 2, characterized in that: The limiting component is a roller, the limiting groove is a curved groove, the curvature of the curved groove is adapted to the curvature of the roller, the rotating spring is a torsion spring, one free end of the torsion spring presses on the side of the crank arm away from the transmission disc, and the other free end of the torsion spring abuts against the positioning post next to the mounting shaft.

4. The gap-driven torsion spring operating mechanism according to claim 1, characterized in that: The operating shaft is provided with a cam, which is fixedly connected to the operating shaft. The protruding part of the cam corresponds to the position of the limiting member.

5. The gap-driven torsion spring operating mechanism according to claim 1, characterized in that: The transmission disc has two limiting grooves on its outer periphery, which are respectively located at the upper and lower parts of the transmission disc. Two sets of limiting components are provided on the rear assembly plate of the three-position switch, and the positions of the two sets of limiting components correspond to the positions of the two limiting grooves.

6. The gap-driven torsion spring operating mechanism according to claim 5, characterized in that: One side of the limiting groove is a steep slope to restrict the roller from leaving the limiting groove, and the other side of the limiting groove is a gentle slope that allows the roller to leave smoothly. The steep slope and gentle slope of the two limiting grooves are set in opposite directions.

7. A three-position switch employing the gap-driven torsion spring operating mechanism according to any one of claims 1-6, characterized in that: A torsion spring operating mechanism with the aforementioned gap drive.

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