A multi-step regulating rotary switch

Abstract

The utility model discloses a kind of multi-grade adjustment rotary switches, including base, shell cover, rotating handle and contact assembly, rotating handle rotationally arranged between base and shell cover, and drive rod extending along its radial direction is provided;Contact assembly includes the multiple elastic structure's moving contact bridge of the shaft center of rotating handle as center annularly arranged in installation cavity, and multiple static contact pieces are arranged in base and respectively opposite multiple moving contact bridges, multiple moving contact bridges are connected and respectively located on the movement path of drive rod, drive rod respectively drives multiple moving contact bridges and multiple static contact pieces contact in rotating handle rotating process, by the mechanism of the wheel contact formed by drive rod and multiple moving contact bridges, operation pressure is significantly dispersed, avoid single moving contact bridge sustained stress, greatly reduce the mechanical load and fatigue degree of moving contact bridge, reduce the probability of heating, reduce wear and risk of fusion welding, extend mechanical service life.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, specifically to a multi-position adjustable rotary switch. Background Technology

[0002] A rotary switch is a product used in AC power electrical appliances to implement multi-function control. Existing patents, such as Chinese patent document CN117174522A, disclose a rotary switch including a switch body and a rotating handle rotatably mounted on the switch body. The switch body includes a cover plate and a base, with the cover plate and base forming a mounting cavity. The base has multiple first terminals spaced circumferentially around the rotating handle. A mating component is provided on the side of the cover plate facing the base, and the mating component has teeth and grooves staggered circumferentially around the rotating handle. A locking block located within the mounting cavity of the rotating handle is fixedly provided with an elastic contact bridge. A slider is fixedly provided on the elastic contact bridge, which can contact the teeth and grooves. The slider is typically a metal block riveted or welded to the contact bridge. The elastic contact bridge rotates with the rotating handle and slides sequentially along the teeth and grooves. During this process, when the elastic contact bridge presses against the teeth, it contacts and connects with the first terminals; when the elastic contact bridge abuts against the grooves, it separates from the first terminals. As can be seen from the above structure, the existing rotary switches still have the following problems in actual use: 1. The single elastic contact bridge is always in contact or switching state during the rotation of the rotary handle. Since the contact bridge is always under force, frequent operation will cause the contacts to heat up, wear continuously, or even weld, resulting in a decrease in the electrical contact reliability of the elastic contact bridge, easy to generate electric arc or poor contact, and shorten the mechanical life; 2. The slider is always elastically pressed against the tooth block and tooth groove, and sliding along the surface of the tooth block and tooth groove when the rotary handle rotates will cause rapid wear, affecting the contact pressure between the contact bridge and the first terminal, thereby reducing electrical reliability. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the problem that in the prior art, a single contact bridge is always in contact or switching state during the rotation of the operating lever, which causes the contacts to heat up, wear continuously, or even weld under frequent operation, resulting in a decrease in the electrical contact reliability of the contact bridge and a shortening of the mechanical life. Thus, a multi-level adjustable rotary switch is provided to reduce the mechanical load and fatigue of the moving contact bridge, extend the mechanical life, and improve the electrical reliability.

[0004] To solve the above-mentioned technical problems, this utility model provides a multi-level adjustable rotary switch, including a base, a cover, a rotating assembly, and a contact assembly. The base and the cover are installed to form a mounting cavity suitable for accommodating the contact assembly and the rotating assembly. The rotating assembly includes a rotating handle rotatably disposed between the base and the cover, and the rotating handle is provided with a drive rod extending radially therefrom.

[0005] The contact assembly includes multiple movable contact bridges with elastic structures arranged in a ring around the axis of the rotating handle in the mounting cavity, and multiple stationary contact pieces disposed on the base and respectively opposite to the multiple movable contact bridges. The multiple movable contact bridges are connected to each other and are respectively located on the movement path of the drive rod. During the rotation of the drive rod following the rotating handle, the drive rod drives the multiple movable contact bridges to contact the multiple stationary contact pieces respectively, and any movable contact bridge recovers its deformation and separates from the stationary contact piece after disengaging from the drive rod.

[0006] As a preferred embodiment, multiple moving contact bridges are connected by a connecting ring and distributed circumferentially around the connecting ring. The connecting ring and the rotating handle are coaxially disposed in the mounting cavity and fixed between the lower end of the rotating handle and the base.

[0007] As a preferred embodiment, one end of the multiple moving contact bridges is integrally connected to the connecting ring, and the other end of the multiple moving contact bridges is provided with contact points and extends obliquely towards the multiple stationary contact pieces.

[0008] As a preferred embodiment, the base has a positioning boss extending axially along the rotating handle, the lower end of the rotating handle is provided with a positioning recess that is rotatably connected to the positioning boss, and the connecting ring is sleeved on the positioning boss and fixed between the positioning boss and the rotating handle.

[0009] As a preferred embodiment, multiple moving contact bridges are arranged in a ring at intervals on the outer periphery of the connecting ring, with adjacent moving contact bridges arranged at an angle to each other; the connecting ring is provided with a first pin extending out of the bottom of the base, and multiple stationary contact pieces are each provided with multiple second pins extending out of the bottom of the base.

[0010] As a preferred embodiment, a corrugated bending reinforcement is provided between the moving contact bridge and the connecting ring.

[0011] As a preferred embodiment, the drive rod is integrally formed on the side wall of the rotating handle, and its end away from the rotating handle is provided with an arc-shaped protrusion that abuts against the moving contact bridge.

[0012] As a preferred embodiment, a guide structure is provided between the multiple moving contact bridges to guide the drive rod to switch motion between the multiple moving contact bridges. The guide structure includes multiple sets of guide fins that are respectively inclinedly arranged on both sides of the multiple moving contact bridges, and the multiple sets of guide fins are respectively located on the movement path of the drive rod.

[0013] As a preferred embodiment, the rotating assembly includes a shift structure disposed between the rotating handle and the housing cover. The shift structure includes: a limiting hole extending radially along the rotating handle and disposed on the side wall of the rotating handle; a shift ball and a shift spring disposed in the limiting hole; and an annular boss disposed inside the housing cover surrounding the rotating handle. The inner wall of the annular boss is provided with a plurality of shift grooves spaced circumferentially. The shift ball is positioned and abutted against one of the shift grooves under the action of the shift spring, and switches between the plurality of shift grooves when the rotating handle rotates.

[0014] As a preferred embodiment, the top of the cover is provided with a threaded joint, the threaded joint having a central hole extending axially along the rotating handle and communicating with the mounting cavity, the rotating handle having an operating end extending out of the top of the cover through the central hole, and the cover and the base being installed and connected by a snap-fit ​​structure.

[0015] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0016] 1. In the multi-position adjustable rotary switch provided by this utility model, a drive rod is introduced as an intermediate transmission structure between the rotating handle and multiple elastic moving contact bridges. Multiple elastic moving contact bridges are arranged circumferentially in the mounting cavity and are respectively located on the movement path of the drive rod. When the rotating handle rotates, the drive rod sequentially drives different moving contact bridges to contact the stationary contact piece, so that each moving contact bridge is only stressed at a specific position and is in a separated state at other times. With the design of this technical solution, the mechanism of alternating contact between the drive rod and multiple moving contact bridges significantly disperses the operating pressure, avoids continuous stress on a single moving contact bridge, greatly reduces the mechanical load and fatigue of the moving contact bridge, extends the mechanical life of the moving contact bridge, thereby reducing the probability of heat generation, reducing wear and welding risks, improving electrical reliability, and significantly extending the mechanical operating life of the overall switch. It is suitable for application scenarios that require frequent position switching.

[0017] 2. In the multi-position adjustable rotary switch provided by this utility model, multiple moving contact bridges are electrically connected to each other through a connecting ring. Since the connecting ring and the rotating handle are coaxially arranged, the multiple moving contact bridges are radially or annularly distributed around the axis of the rotating handle. When the drive rod rotates around the same axis, it can press against the multiple moving contact bridges respectively, thereby driving the multiple moving contact bridges to contact the multiple stationary contact pieces to conduct the circuit, achieving multi-loop control. This design, by having the drive rod alternately contact the multiple moving contact bridges, avoids continuous force on a single moving contact bridge and oxidation caused by long-term energization. The multiple moving contact bridges can distribute the number of contacts with the drive rod, reducing the current-carrying pressure of a single moving contact bridge, reducing heat generation, which helps reduce arc generation, improves the electrical reliability of the product, and extends its mechanical and electrical life.

[0018] 3. In the multi-position adjustable rotary switch provided by this utility model, the rotating handle and the base are connected by a positioning boss and a positioning recess, which are fitted with a shaft hole to position and rotate the rotating handle. The connecting ring is sleeved on the positioning boss and is limited between the rotating handle and the positioning boss, so that the multiple moving contact bridges connected to the connecting ring are strictly distributed with the axis of the rotating handle as the center. This design not only provides rigid support for the connecting ring and the multiple moving contact bridges, but also ensures that the multiple moving contact bridges are evenly distributed circumferentially, thereby realizing the advantages of high-precision coaxial transmission, low-wear contact, and easy assembly and maintenance of the rotary switch.

[0019] 4. In the multi-position adjustable rotary switch provided by this utility model, the end of the drive rod away from the rotating handle is provided with an arc-shaped protrusion that presses against the moving contact bridge, and multiple sets of guide fins are provided on both sides of the multiple moving contact bridges. The advantage of this design is that when the drive rod rotates and needs to contact the next moving contact bridge, it will first contact the inclined guide fins on the side of the target moving contact bridge through the arc surface of the arc protrusion. This contact between the arc protrusion and the inclined guide fins is gradual and sliding, which is also conducive to dispersing contact stress. This greatly reduces the impact resistance and frictional resistance when the drive rod cuts into the next moving contact bridge, making the switching action smoother and less strenuous, reducing the torque required by the operator, improving the feel, and thus accurately guiding the drive rod into the moving contact bridge driving position, preventing jamming or misalignment, and improving the reliability of electrical connection. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the planar structure of a multi-position adjustable rotary switch provided for utility model;

[0022] Figure 2 A cross-sectional structural schematic diagram of a multi-position adjustable rotary switch provided for utility model;

[0023] Figure 3 A schematic diagram of the internal structure of a multi-position adjustable rotary switch of a utility model;

[0024] Figure 4 This is a schematic diagram of the gear shift structure of the utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the moving contact bridge of the utility model.

[0026] Figure descriptions: 1. Base; 11. Positioning boss; 12. Threaded connector; 2. Shell cover; 3. Rotating handle; 31. Positioning recess; 4. Drive rod; 41. Arc protrusion; 5. Moving contact bridge; 51. Bending reinforcement; 52. Guide fin; 53. First pin; 6. Stationary contact piece; 61. Second pin; 7. Connecting ring; 81. Gear ball; 82. Gear spring; 83. Annular boss; 84. Gear tooth groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Example

[0031] This utility model provides, for example Figure 1-5 The multi-position adjustable rotary switch shown includes a base 1, a cover 2, a rotating assembly, and a contact assembly. The base 1 and the cover 2 are mounted to form a mounting cavity suitable for accommodating the contact assembly and the rotating assembly. The rotating assembly includes a rotating handle 3 rotatably disposed between the base 1 and the cover 2, and the rotating handle 3 is provided with a drive rod 4 extending radially therefrom.

[0032] The contact assembly includes multiple movable contact bridges 5 with elastic structures arranged in a ring around the axis of the rotating handle 3 in the mounting cavity, and multiple stationary contact pieces 6 disposed on the base 1 and respectively opposite to the multiple movable contact bridges 5. The multiple movable contact bridges 5 are connected to each other and are respectively located on the movement path of the drive rod 4. During the rotation of the drive rod 4 following the rotating handle 3, the drive rod 4 drives the multiple movable contact bridges 5 to contact the multiple stationary contact pieces 6 respectively. When the movable contact bridge 5 is driven and pressed by the drive rod 4, it elastically shifts to one side of the stationary contact piece 6. Therefore, after any movable contact bridge 5 is disengaged from the drive rod 4, it recovers its deformation and separates from the stationary contact piece 6.

[0033] The above-described implementation method is the core technical solution of this embodiment. By introducing a drive rod 4 as an intermediate transmission structure between the rotating handle 3 and multiple elastic moving contact bridges 5, multiple elastic moving contact bridges 5 are arranged circumferentially in the mounting cavity and are respectively located on the movement path of the drive rod 4. When the rotating handle 3 rotates, the drive rod 4 sequentially drives different moving contact bridges 5 to contact the stationary contact piece 6, so that each moving contact bridge 5 is only stressed at a specific gear position and is in a separated state at other times. With the design of this technical solution, the mechanism of alternating contact between the drive rod 4 and multiple moving contact bridges 5 significantly disperses the operating pressure, avoids continuous stress on a single moving contact bridge, greatly reduces the mechanical load and fatigue of the moving contact bridge 5, extends the mechanical life of the moving contact bridge 5, thereby reducing the probability of heat generation, reducing wear and welding risks, improving electrical reliability, and significantly extending the mechanical operating life of the overall switch. It is suitable for application scenarios that require frequent gear switching.

[0034] The following is combined Figure 2-5 The specific configuration of multiple moving contact bridges 5 is explained in detail:

[0035] Multiple moving contact bridges 5 are connected by a connecting ring 7 and are distributed circumferentially around the connecting ring. The connecting ring 7 and the rotating handle 3 are coaxially arranged in the mounting cavity and fixed between the lower end of the rotating handle and the base. Specifically, one end of each moving contact bridge 5 is integrally connected to the connecting ring, and the other end of each moving contact bridge 5 is provided with a contact point and extends obliquely towards each stationary contact piece 6. This allows the multiple moving contact bridges 5 and the multiple stationary contact pieces 6 to be arranged vertically opposite each other in the mounting cavity. With this structure, the multiple moving contact bridges 5 are electrically connected to each other through the connecting ring 7. Since the connecting ring 7 and the rotating handle are coaxially arranged, the multiple moving contact bridges 5 are arranged radially or in a ring around the axis of the rotating handle. When the drive rod 4 rotates around the same axis, it can press against each of the multiple moving contact bridges 5, thereby driving the multiple moving contact bridges 5 to contact the multiple stationary contact pieces 6 to conduct the circuit, realizing multi-loop control. This achieves reliable control of multiple contacts in a compact space, taking into account both mechanical transmission efficiency and electrical performance. Compared with existing technologies, this technical solution avoids oxidation caused by continuous force on a single moving contact bridge 5 and long-term energization by having the drive rod 4 alternately contact with multiple moving contact bridges 5. The multiple moving contact bridges 5 can distribute the number of contacts with the drive rod 4, reduce the current carrying pressure of a single moving contact bridge 5, reduce heat generation, reduce arc generation, and improve the electrical reliability and mechanical and electrical life of the product.

[0036] In a further preferred configuration, multiple moving contact bridges 5 are arranged in a ring at intervals on the outer periphery of the connecting ring 7, and adjacent moving contact bridges 5 are arranged at an angle to each other. The connecting ring 7 is provided with a first pin 53 extending out of the bottom of the base 1, and multiple stationary contact pieces 6 are respectively provided with multiple second pins 61 extending out of the bottom of the base 1. The first pin 53 and the second pin 61 can be used for connecting external wires, wherein the base 1 is provided with a positioning boss 11 extending along the axial direction of the rotating handle, and the lower end of the rotating handle 3 is provided with a positioning recess 31 that is rotatably connected to the positioning boss 11. The connecting ring 7 is sleeved on the positioning boss 11 and is limited and fixed between the positioning boss 11 and the rotating handle. This structural design uses the positioning boss 11 and the positioning recess 31 to position and rotate the rotating handle 3 through a shaft-hole fit. The connecting ring 7 is pressed and fixed on the positioning boss 11 by the rotating handle 3, so that the multiple moving contact bridges 5 connected to the connecting ring 7 are strictly distributed with the axis of the rotating handle 3 as the center. This design not only provides rigid support for the connecting ring 7 and the multiple moving contact bridges 5, but also ensures that the multiple moving contact bridges are evenly distributed circumferentially, thereby realizing the advantages of high-precision coaxial transmission, low-wear contact, and easy assembly and maintenance of the rotary switch.

[0037] To ensure smoother and less strenuous switching between multiple moving contact bridges, such as... Figure 2-4As shown, the drive rod 4 is integrally formed on the side wall of the rotating handle 3, and its end away from the rotating handle 3 is provided with an arc protrusion 41 that presses against the movable contact bridge 5. In a further preferred embodiment, a guide structure is provided between the multiple movable contact bridges 5 to guide the drive rod to switch between the multiple movable contact bridges 5. The guide structure includes multiple sets of guide fins 52 that are respectively inclinedly arranged on both sides of the multiple movable contact bridges 5. The multiple sets of guide fins 52 are respectively located on the movement path of the drive rod 4. The advantage of this design is that when the drive rod 4 rotates and needs to contact the next moving contact bridge 5, its arc surface through the arc protrusion 41 will first contact the inclined guide fin 52 on the side of the target moving contact bridge. This contact between the arc protrusion 41 and the inclined guide fin 52 is gradual and sliding, which is also conducive to dispersing contact stress. This greatly reduces the impact resistance and frictional resistance when the drive rod 4 cuts into the next moving contact bridge 5, making the switching action smoother and less strenuous, reducing the torque required by the operator, improving the feel, and thus accurately guiding the drive rod 4 into the driving position of the moving contact bridge, preventing jamming or misalignment, and improving the reliability of the electrical connection.

[0038] To improve the deformation resistance of the moving contact bridge 5, such as Figure 5 As shown, a corrugated bending reinforcement 51 is provided between the moving contact bridge 5 and the connecting ring 7. This bending reinforcement 51 is a structural reinforcement design for the elastic moving contact bridge 5 to withstand cyclic stress during frequent driving and resetting. It can improve the structural strength of the moving contact bridge 5 and increase its fatigue life. When the driving rod 4 presses against the moving contact bridge 5, the stress is evenly distributed along the corrugated surface, avoiding stress concentration on a single plane. This significantly delays the generation of fatigue cracks, improves the fatigue life of the moving contact bridge 5 under long-term cyclic load, and avoids deformation or even fracture failure caused by metal fatigue.

[0039] In this embodiment, the rotating assembly includes a stop structure disposed between the rotating handle 3 and the housing cover 2, such as... Figure 4As shown, the gear shift structure includes: a limiting hole extending radially along the rotating handle 3 and disposed on the side wall of the rotating handle 3; a gear shift ball 81 and a gear shift spring 82 disposed in the limiting hole; and an annular boss 83 disposed inside the housing cover 2 surrounding the rotating handle 3. The inner wall of the annular boss 83 is provided with a plurality of gear shift grooves 84 spaced circumferentially. The gear shift ball 81 is positioned and abutted against one of the gear shift grooves 84 under the action of the gear shift spring 82, and switches between the plurality of gear shift grooves 84 when the rotating handle 3 rotates. With this structural design, when the rotary handle 3 is rotated to a specific angle, the gear ball 81 is embedded in the gear tooth groove 84 under the spring force, achieving rigid positioning. When switching gears, the rotational force causes the ball to roll up along the slope of the current gear tooth groove 84. After passing the tooth tip, the ball will quickly fall into the next gear tooth groove 84 under the action of the spring, completing the switch and generating clear feedback. This gear structure, through the design of mechanical locking and elastic feedback, achieves precise positioning, clear operation experience and high reliability in the compact space of the rotary switch, improving the performance of the product.

[0040] like Figure 1-2 As shown, the top of the cover 2 is provided with a threaded connector 12. The threaded connector 12 has a central hole extending axially along the rotating handle 3 and communicating with the mounting cavity. The rotating handle 3 has an operating end that extends out of the top of the cover 2 through the central hole. The cover 2 and the base 1 are connected by a snap-fit ​​structure. The threaded connector 12 allows the cover 2 to be quickly assembled with external devices (such as panels) via threads without the need for additional fasteners, simplifying the assembly process. The operating lever extends directly to the top of the cover 2, and the user only needs a small torque to drive the rotating handle 3 to rotate, thereby driving multiple moving contact bridges 5 to contact multiple stationary contact pieces 6 to achieve circuit conduction.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A multi-step regulating rotary switch comprising a base (1), a cover (2), a rotary assembly and a contact assembly, said base (1) and cover (2) are mounted to form a mounting cavity suitable for accommodating the contact assembly and the rotary assembly, characterized in that: The rotating assembly includes a rotating handle (3) rotatably disposed between the base (1) and the shell cover (2), the rotating handle (3) being provided with a drive rod (4) extending radially thereon; The contact assembly includes multiple movable contact bridges (5) with elastic structures arranged in a ring around the axis of the rotating handle (3) in the mounting cavity, and multiple stationary contact pieces (6) disposed on the base (1) and respectively opposite to the multiple movable contact bridges (5). The multiple movable contact bridges (5) are connected to each other and are respectively located on the movement path of the drive rod (4). During the rotation of the drive rod (4) following the rotating handle (3), the drive rod (4) drives the multiple movable contact bridges (5) to contact the multiple stationary contact pieces (6) respectively. After any movable contact bridge (5) is disengaged from the drive rod (4), it recovers its deformation and separates from the stationary contact piece (6).

2. The multi-position adjustable rotary switch according to claim 1, characterized in that: Multiple moving contact bridges (5) are connected by a connecting ring (7) and are distributed circumferentially around the connecting ring. The connecting ring (7) and the rotating handle (3) are coaxially arranged in the mounting cavity and fixed between the lower end of the rotating handle (3) and the base (1).

3. A multi-position adjustable rotary switch according to claim 2, characterized in that: One end of the multiple moving contact bridges (5) is integrally connected to the connecting ring, and the other end of the multiple moving contact bridges (5) is provided with a contact point and extends tilted upwards towards the multiple stationary contact pieces (6).

4. A multi-position adjustable rotary switch according to claim 2, characterized in that: The base (1) has a positioning boss (11) extending along the axial direction of the rotating handle. The lower end of the rotating handle (3) is provided with a positioning recess (31) that is rotatably connected to the positioning boss (11). The connecting ring (7) is sleeved on the positioning boss (11) and is pressed and fixed between the positioning boss (11) and the rotating handle (3).

5. A multi-position adjustable rotary switch according to any one of claims 2-4, characterized in that: Multiple moving contact bridges (5) are arranged in a ring at intervals on the outer periphery of the connecting ring (7), and adjacent moving contact bridges (5) are arranged at an angle to each other; the connecting ring (7) is provided with a first pin (53) extending out of the bottom of the base (1), and multiple stationary contact pieces (6) are respectively provided with multiple second pins (61) extending out of the bottom of the base (1).

6. A multi-position adjustable rotary switch according to claim 5, characterized in that: A corrugated bending reinforcement (51) is provided between the moving contact bridge (5) and the connecting ring (7).

7. A multi-position adjustable rotary switch according to claim 1, characterized in that: The drive rod (4) is integrally formed on the side wall of the rotating handle, and its end away from the rotating handle (3) is provided with an arc protrusion (41) that presses against the moving contact bridge (5).

8. A multi-position adjustable rotary switch according to claim 7, characterized in that: A guide structure is provided between the multiple moving bridges (5) to guide the drive rod to switch between the multiple moving bridges (5). The guide structure includes multiple sets of guide fins (52) that are respectively inclinedly arranged on the sides of the multiple moving bridges (5). The multiple sets of guide fins (52) are respectively located on the movement path of the drive rod (4).

9. A multi-position adjustable rotary switch according to claim 1 or 7, characterized in that: The rotating assembly includes a gear shift structure disposed between the rotating handle (3) and the housing (2). The gear shift structure includes: a limiting hole extending radially along the rotating handle (3) and disposed on the side wall of the rotating handle (3); a gear shift ball (81) and a gear shift spring (82) disposed in the limiting hole; and an annular boss (83) disposed around the rotating handle (3) inside the housing (2). The annular boss (83) has multiple gear shift grooves (84) spaced circumferentially on its inner wall. The gear shift ball (81) is positioned and abuts against one of the gear shift grooves (84) under the action of the gear shift spring (82), and switches between the multiple gear shift grooves (84) when the rotating handle (3) rotates.

10. A multi-position adjustable rotary switch according to claim 9, characterized in that: The top of the cover (2) is provided with a threaded connector (12), the threaded connector (12) has a central hole extending axially along the rotating handle (3) and communicating with the mounting cavity, the rotating handle (3) has an operating end extending through the central hole to the top of the cover, and the cover (2) and the base (1) are connected by a snap-fit ​​structure.

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