Top knob of gamepad and gamepad

By incorporating a spring-loaded contact plate on the top knob of the game controller to abut against the circuit board, the problem of easy damage at the connection between the knob and the circuit board is solved, extending the lifespan of the knob and reducing costs.

CN223969460UActive Publication Date: 2026-03-06AIFRUTECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

The connection between the knobs and the circuit board on existing game controllers is easily damaged, affecting their lifespan.

Method used

Design a top knob for a game controller. By setting a spring at the bottom of the knob body, the spring abuts against and is electrically connected to the circuit board. The knob body drives the spring to rotate to adjust the gear, avoiding a fixed connection between the knob and the circuit board and reducing wear.

Benefits of technology

It improves the lifespan of the knobs, reduces the damage rate of the knobs, ensures working performance, and saves costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223969460U_ABST
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Abstract

The utility model discloses a top knob of a gamepad and the gamepad, relates to the technical field of gamepads, and solves the technical problem that the service life is affected due to the fact that the joint of a knob and a circuit board on an existing gamepad is easy to damage. The top knob comprises a knob body and an elastic piece, the elastic piece is fixed to the bottom of the knob body, and the elastic piece is arranged above a circuit board of the gamepad. The bottom plate of the knob body and the elastic sheet are abutted against the circuit board; the elastic sheet is electrically connected with the circuit board; the knob body can drive the elastic piece to rotate, so that the elastic piece is connected with different contacts on the circuit board, and the gear of the top knob is adjusted. The top knob is arranged on the top of the gamepad, the top knob abuts against the circuit board in the gamepad, the top knob is supported through the circuit board, when the elastic piece abuts against the contact of the circuit board, the corresponding gear function is triggered, the damage rate of the top knob is reduced, and the service life of the top knob is prolonged. The service life of the top knob is prolonged; and the working performance is ensured.
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Description

Technical Field

[0001] This utility model relates to the field of game controller technology, and in particular to a top knob and game controller for a game controller. Background Technology

[0002] A game controller is a common component of video game consoles, used to control virtual characters in games by manipulating its buttons and other controls. To accommodate increasingly diverse gameplay and control requirements, the functionality and user experience of game controllers are constantly being improved.

[0003] Game controllers have multiple control buttons, each with its own function. Furthermore, certain control buttons can be combined in different sequences or combinations to create shortcuts for specific controls. When controlling a virtual character using a game controller, players typically use these shortcuts to connect via Bluetooth, UWB, or access sports modes. To simplify operation, some game controllers use adjustable knobs instead of these shortcuts. However, these knobs are usually fixed to a circuit board inside the controller. Over time, this connection can be damaged, affecting the knob's lifespan.

[0004] In the process of developing this utility model, the applicant discovered at least the following problems in the prior art:

[0005] The connection between the knobs and the circuit board on existing game controllers is easily damaged, which affects their lifespan. Utility Model Content

[0006] The purpose of this utility model is to provide a top knob and a game controller to solve the technical problem in existing game controllers where the connection between the knob and the circuit board is easily damaged, thus affecting the service life. The various technical effects of the preferred solutions among the many technical solutions provided by this utility model are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides a top knob for a game controller. The top knob is located on the top of the game controller and includes a knob body and a spring. The spring is fixed to the bottom of the knob body and is positioned above the circuit board of the game controller. The bottom plate of the knob body and the spring are both in contact with the circuit board. The spring is electrically connected to the circuit board. The knob body can drive the spring to rotate, so that the spring connects to different contacts on the circuit board, thereby adjusting the position of the top knob.

[0009] Optionally, the spring includes a connecting part and two elastic parts. The connecting part is fixed to the bottom of the knob body. The first ends of the two elastic parts are fixedly connected to the connecting part, and the second ends of the two elastic parts extend to two symmetrical contacts on the circuit board.

[0010] Optionally, both elastic parts have a torsion angle with the connecting part, and the torsion angle is the angle between the surface of the elastic part and the surface of the connecting part.

[0011] Optionally, the two elastic parts are symmetrically arranged on both sides of the connecting part.

[0012] Optionally, the spring sheet has a one-piece structure.

[0013] Optionally, the knob body includes a knob switch cap and a bracket, and the knob switch cap and the bracket together form an integral structure of the knob body.

[0014] Optionally, the knob body includes a knob switch cap and a bracket. A mounting post is provided on one end of the bracket. The mounting post matches the knob switch cap. The bracket is engaged and fixed inside the knob switch cap by the mounting post, and the bracket is fixedly connected to the bottom of the knob switch cap.

[0015] Optionally, the bracket includes a mounting groove and two notches. The mounting groove matches the connecting part and is used to fix the connecting part. The two notches are symmetrically arranged on the side of the mounting groove and are used for the elastic part to extend out of the mounting groove.

[0016] Optionally, the bracket further includes a stop block and two elastic buckles. The two elastic buckles are symmetrically arranged on the periphery of the mounting groove. The elastic buckles are used to cooperate with the top shell of the game controller to provide feedback on the gear adjustment. The stop block is fixed on the periphery of the mounting groove and is used to limit and fix the knob body.

[0017] A game controller includes a top knob, a circuit board, and a top housing as described above; the circuit board is fixed inside the top housing, and the circuit board is provided with a plurality of contacts arranged in a ring, and the plurality of contacts are correspondingly disposed below the periphery of the spring piece;

[0018] The top housing includes a through-hole structure, a limiting rib, and multiple clearance zones. The first end of the top knob passes through the through-hole structure and is exposed outside the top housing. The second end of the top knob is engaged with the top housing, and the top knob is movably connected to the top housing. The limiting rib is fixed on the edge of the through-hole structure and is used to stop the top knob. The multiple clearance zones are arranged around the through-hole structure and are used to limit the gear position of the top knob and provide gear shifting feel.

[0019] Implementing one of the above-described technical solutions of this utility model has the following advantages or beneficial effects:

[0020] This invention places the top knob on the top of the game controller, which abuts against the circuit board inside the game controller. The circuit board supports the top knob, and when the spring contacts the contact point on the circuit board, it triggers the corresponding gear function, reducing the damage rate of the top knob, increasing its service life and ensuring its working performance, and saving costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is an installation diagram of an embodiment of the top knob of the game controller of this utility model;

[0023] Figure 2 This is a first exploded view of an embodiment of the top knob of the game controller of this utility model;

[0024] Figure 3 This is a second exploded view of an embodiment of the top knob of the game controller of this utility model;

[0025] Figure 4 This is a third exploded view of an embodiment of the top knob of the game controller of this utility model;

[0026] Figure 5 This is a fourth exploded view of an embodiment of the top knob of the game controller of this utility model;

[0027] Figure 6 This is the fifth exploded view of an embodiment of the top knob of the game controller of this utility model;

[0028] Figure 7 This is a first exploded view of an embodiment of the game controller of this utility model;

[0029] Figure 8 This is a second exploded view of an embodiment of the game controller of this utility model;

[0030] Figure 9 This is a structural schematic diagram of an embodiment of the game controller of this utility model.

[0031] In the diagram: 1. Knob body; 11. Knob switch cap; 12. Bracket; 121. Mounting slot; 122. Notch; 123. Stop; 124. Elastic buckle; 13. Mounting post; 2. Spring; 21. Connecting part; 22. Elastic part; 3. Circuit board; 31. Contact; 4. Top shell; 41. Through hole structure; 42. Limiting bone; 43. Clearance area. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be adopted to implement this utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of this utility model disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] To illustrate the technical solution described in this utility model, specific embodiments are described below, showing only the parts related to the embodiments of this utility model.

[0035] Example 1:

[0036] like Figure 1As shown, this utility model provides a top knob for a game controller. The top knob is located on the top of the game controller and includes a knob body 1 and a spring 2. The spring 2 is fixed to the bottom of the knob body 1 and is positioned above the circuit board 3 of the game controller. Both the bottom plate of the knob body 1 and the spring 2 abut against the circuit board 3. The spring 2 is electrically connected to the circuit board 3. The knob body 1 can drive the spring 2 to rotate, connecting the spring 2 to different contacts 31 on the circuit board 3, thereby adjusting the level of the top knob. Specifically, the top knob is located on the top of the game controller, making it convenient for users to operate and control the game controller's working mode and the connection mode between the game controller and the host, improving the user experience. The spring 2 is fixed to the bottom of the knob body 1, allowing it to be positioned adjacent to the circuit board 3 inside the game controller, facilitating the triggering of different level functions on the circuit board 3. The base plate of the knob body 1 and the spring contact 2 both abut against the circuit board 3. The circuit board 3 supports the top knob. When the top knob is rotated, since it is not fixedly connected to the circuit board 3, the connection between the top knob and the circuit board 3 is less prone to damage, thus improving service life and saving costs. The circuit board 3 has multiple exposed copper areas as contacts 31. When the spring contact 2 abuts against the contact 31 of the circuit board 3, an electrical connection is established between the spring contact 2 and the circuit board 3, triggering the corresponding gear function of the contact 31. The top knob is movably connected to the top of the game controller. When the user rotates the knob body 1, the knob body 1 drives the spring contact 2 to rotate synchronously, connecting the spring contact 2 to different contacts 31 on the circuit board 3, thereby switching between the game controller's working mode and the game controller and host connection mode.

[0037] This invention places the top knob on the top of the game controller, which abuts against the circuit board 3 inside the game controller. The circuit board 3 supports the top knob. When the spring 2 abuts against the contact 31 of the circuit board 3, the corresponding gear function is triggered, reducing the damage rate of the top knob, increasing its service life and ensuring its working performance, and saving costs.

[0038] As an optional implementation method, such as Figure 2As shown, the spring piece 2 includes a connecting part 21 and two elastic parts 22. The connecting part 21 is fixed to the bottom of the knob body 1. The first ends of the two elastic parts 22 are fixedly connected to the connecting part 21, and the second ends of the two elastic parts 22 extend to two symmetrical contacts 31 on the circuit board 3. Specifically, the connecting part 21 is provided with mounting holes and multiple positioning holes. The connecting part 21 is fitted onto the positioning post at the bottom of the knob body 1 through the multiple positioning holes, facilitating the positioning and installation of the spring piece 2. The mounting holes of the connecting part 21 are fixed to the fixing post at the bottom of the knob body 1 by cooperating with screws or bolts. The mounting holes can be set in the middle of the connecting part 21 to ensure the stability of fixing the spring piece 2. The number of positioning holes can be adaptively set according to actual needs, and can be selected as two to ensure positioning effect. The first ends of both elastic parts 22 are fixedly connected to the connecting part 21. When the knob body 1 drives the connecting part 21 to rotate, it can drive the elastic parts 22 to move synchronously, so that the second ends of the elastic parts 22 extending to the circuit board 3 come into contact with the contacts on the circuit board 3. When the second ends of the two elastic parts 22 come into contact with the contacts 31 on the circuit board 3, the corresponding gear function of the contacts 31 can be triggered.

[0039] As an optional implementation method, such as Figure 3 As shown, both elastic parts 22 have a torsional angle with the connecting part 21, which is the angle between the surface of the elastic part 22 and the surface of the connecting part 21. Specifically, the torsional angle between the two elastic parts 22 and the connecting part 21 allows the elastic parts 22 to extend towards the circuit board 3 located below the spring piece 2 when it extends, ensuring that the spring piece 2 can abut against the circuit board 3 located below it through the elastic parts 22, thereby achieving an electrical connection between the spring piece 2 and the circuit board 3 and identifying the corresponding gear position.

[0040] As an optional implementation method, such as Figure 4 As shown, two elastic parts 22 are symmetrically arranged on both sides of the connecting part 21. Specifically, the symmetrical arrangement of the two elastic parts 22 on both sides of the connecting part 21 ensures that when the knob body 1 drives the spring piece 2 to rotate, the force on both sides of the connecting part 21 is even, allowing the spring piece 2 to rotate stably. Furthermore, the symmetrical arrangement of the two elastic parts 22 on both sides of the connecting part 21 ensures that both elastic parts 22 extend in a clockwise or counterclockwise direction around the connecting part 21, guaranteeing that both elastic parts 22 move in the same direction when the spring piece 2 rotates, resulting in smoother rotation of the spring piece 2.

[0041] As an optional implementation method, such as Figure 4As shown, the spring 2 has a one-piece structure. Specifically, the spring 2 can be a one-piece structure, which facilitates processing and production, makes assembly easier, and improves the production efficiency of the top knob. At the same time, the one-piece spring 2 has strong stability, allowing it to rotate stably when the knob body 1 drives it to rotate. The material of the spring 2 should have high elastic limit, fatigue limit, impact toughness, and good heat treatment properties. The material of the spring 2 can be carbon spring 2 steel, alloy spring 2 steel, stainless steel, copper alloy, and nickel alloy, etc.

[0042] As an optional implementation method, such as Figure 3 As shown, the knob body 1 includes a knob switch cap 11 and a bracket 12. The knob switch cap 11 and the bracket 12 together form an integral structure of the knob body 1. Specifically, the integral structure of the knob body 1 facilitates processing and production, makes assembly easier, and improves the production efficiency of the top knob.

[0043] As an optional implementation method, such as Figure 4 As shown, the bracket 12 includes a mounting groove 121 and two notches 122. The mounting groove 121 matches the connecting part 21 and is used to fix the connecting part 21. The two notches 122 are symmetrically arranged on the side of the mounting groove 121 and are used for the elastic part 22 to extend out of the mounting groove 121. Specifically, the bracket 12 has a mounting groove 121 in the middle, which matches the connecting part 21. The mounting groove 121 has a fixing post and multiple positioning posts. The multiple positioning posts correspond to and match the multiple positioning holes on the spring piece 2. The spring piece 2 can be sleeved on the positioning posts, thereby being installed in the mounting groove 121. The mounting holes of the spring piece 2 and the fixing posts of the bracket 12 are connected by screws, thereby fixing the spring piece 2 to the mounting groove 121. Two notches 122 are provided on the side of the mounting groove 121, and the notches 122 are symmetrically arranged so that the two elastic parts 22 on the connecting part 21 that are centrally symmetrical can extend out of the mounting groove 121 from the notches 122 and continue to extend around the outside of the mounting groove 121.

[0044] As an optional implementation method, such as Figure 2As shown, the bracket 12 also includes a stop block 123 and two elastic buckles 124. The two elastic buckles 124 are symmetrically arranged on the periphery of the mounting groove 121. The elastic buckles 124 are used to cooperate with the top shell 4 of the game controller to provide feedback on the gear adjustment. The stop block 123 is fixed on the periphery of the mounting groove 121 and is used to limit and fix the knob body 1. Specifically, the two elastic buckles 124 are symmetrically arranged on the periphery of the mounting groove 121. The elastic buckles 124 cooperate with the clearance area 43 (described below) on the top shell 4 of the game controller. When the knob body 1 is rotated to adjust the gear, the elastic buckle 124 abuts against the side wall of the clearance area 43. The applied rotational force cooperates with the side wall of the clearance area 43 to compress the elastic buckle 124, rotating the elastic buckle 124 from the clearance area 43 to the adjacent clearance area 43. The elastic buckle 124 rebounds, limiting the bracket 12 within the clearance area 43 after gear adjustment. During this process, the user can feel the resistance and release of the elastic buckle 124, thus achieving feedback on the feel and position of each gear. The stop block 123 is set between the two elastic buckles 124, and the stop block 123 is higher than the elastic buckles 124. Through the cooperation of the stop block 123 and the limiting bone 42 on the top housing 4 (as described below), the knob body 1 is stopped within the required rotation range, preventing the knob body 1 from rotating continuously in the same direction without stopping, thus making it unclear which function gear is being adjusted.

[0045] Example 2:

[0046] like Figure 5 and Figure 6 As shown, the difference between this second embodiment and the first embodiment is that:

[0047] The knob body 1 includes a knob switch cap 11 and a bracket 12. A mounting post 13 is provided at one end of the bracket 12, which matches the knob switch cap 11. The bracket 12 is locked inside the knob switch cap 11 by the mounting post 13 and is fixedly connected to the bottom of the knob switch cap 11. Specifically, when the knob body is rotated, friction easily occurs between the bracket 12 and the top shell 4 of the game controller due to the contact between the bracket 12 and the top shell 4. By making the knob switch cap 11 and the bracket 12 of the knob body 1 detachable, the materials of the knob switch cap 11 and the bracket 12 can be selected according to actual needs. For example, the material of the knob switch cap 11 can be metal or plastic, and the material of the bracket 12 can be a material with good wear resistance, thereby improving the service life of the knob body 1. At the same time, when the bracket 12 is severely worn, it can be directly replaced, further extending the service life of the knob body 1 and saving costs. Except for the differences mentioned above, the top knob of Embodiment 2 has the same structural design as the top knob of Embodiment 1.

[0048] Example 3:

[0049] like Figures 7-9 As shown, a game controller includes a top knob, a circuit board 3, and a top housing 4, as described in Embodiment 1 and / or Embodiment 2. The circuit board 3 is fixed inside the top housing 4 and has multiple contacts 31 arranged in a ring, corresponding to the lower sides of the spring contacts 2. The top housing 4 includes a through-hole structure 41, a limiting rib 42, and multiple clearance areas 43. The first end of the top knob passes through the through-hole structure 41 and is exposed outside the top housing 4. The second end of the top knob is engaged with the top housing 4, and the top knob is movably connected to the top housing 4. The limiting rib 42 is fixed to the edge of the through-hole structure 41 and is used to stop the top knob. The multiple clearance areas 43 are arranged around the through-hole structure 41 and are used to limit the gear position of the top knob and provide a gear shifting feel. Specifically, two top knobs are located on the top of the game controller to control different operating modes. One top knob switches the connection method between the game controller and the console, allowing the game controller to connect to a game console (i.e., a Switch) or a computer (i.e., a PC). The connection method between the game controller and the game console can be Bluetooth or wired USB. The connection method between the game controller and the computer can be UWB (Ultra-Low Latency) mode, wired USB mode, or Bluetooth mode. The other top knob is used for powering on / off and switching to Sport mode. Rotating the top knob adjusts the game controller's power-on and connection status. Both top knobs can be the same as those in Embodiment 1 or Embodiment 2, or one can be the same as the other.

[0050] More specifically, the circuit board 3 is fixed inside the top housing 4, and the protection of the top housing 4 can improve the service life of the game controller. Multiple exposed copper areas are provided on the circuit board 3 to form contacts 31. The contacts 31 are arranged in a ring, corresponding to the periphery of the spring 2 of the top knob, ensuring that the spring 2 can trigger the contacts 31. The upper end of the knob body 1 passes through the through-hole structure 41 from inside the top housing 4 and is exposed outside the top housing 4, facilitating user operation of the knob body 1. The lower end of the knob body 1 is engaged in the clearance area 43. The limiting bone 42 is fixed to the edge of the through-hole structure 41. The length of the limiting bone 42 can be set according to actual needs, limiting the rotation range of the knob body 1. When the stop 123 on the knob body 1 abuts against the limiting bone 42 during rotation, the knob body 1 cannot continue to rotate in the previous direction.

[0051] The above description is merely a preferred embodiment of the present utility model. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Furthermore, under the teachings of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present utility model.

Claims

1. A top knob of a gamepad, characterized in that, The top knob is arranged on the top of the game handle, comprising a knob body (1) and a spring sheet (2), the spring sheet (2) is fixed on the bottom of the knob body (1), and the spring sheet (2) is arranged above the circuit board (3) of the game handle; the bottom plate of the knob body (1) and the spring sheet (2) are in abutment with the circuit board (3); the spring sheet (2) is electrically connected with the circuit board (3); the knob body (1) can drive the spring sheet (2) to rotate, so that the spring sheet (2) is connected with different contacts (31) on the circuit board (3), thereby adjusting the gear of the top knob; the spring sheet (2) comprises a connecting part (21) and two elastic parts (22), the connecting part (21) is fixed on the bottom of the knob body (1); the first ends of the two elastic parts (22) are fixedly connected with the connecting part (21), and the second ends of the two elastic parts (22) respectively extend to two contacts (31) on the circuit board (3) which are symmetrical to each other; the knob body (1) comprises a support (12), the support (12) comprises a mounting groove (121), two notches (122), a stop block (123) and two elastic buckles (124), the mounting groove (121) is matched with the connecting part (21), and the mounting groove (121) is used for fixing the connecting part (21); the two notches (122) are symmetrically arranged on the side edges of the mounting groove (121), and the notches (122) are used for the elastic parts (22) to extend out of the mounting groove (121); the two elastic buckles (124) are symmetrically arranged on the circumferential side of the mounting groove (121), the elastic buckles (124) are used for cooperating with the top shell (4) of the game handle to feedback that the gear is adjusted to the position, and the stop block (123) is fixed on the circumferential side of the mounting groove (121), and the stop block (123) is used for limiting and fixing the knob body (1).

2. A top knob for a gamepad as claimed in claim 1, characterized in that The two elastic parts (22) are both provided with a torsion angle between the connecting part (21), and the torsion angle is the included angle between the surface of the elastic part (22) and the surface of the connecting part (21).

3. A top knob for a gamepad as defined in claim 2, characterized in that The two elastic parts (22) are symmetrically arranged at the two sides of the connecting part (21).

4. The top knob of a gamepad according to claim 3, wherein, The structure of the spring sheet (2) is an integral structure.

5. The top knob of a gamepad according to claim 4, wherein, The knob body (1) further comprises a knob switch cap (11), and the structure of the knob body (1) composed of the knob switch cap (11) and the support (12) is an integral structure.

6. The top knob of a gamepad according to claim 4, wherein, The knob body (1) further comprises a knob switch cap (11), one end of the support (12) is provided with a mounting column (13), the mounting column (13) is matched with the knob switch cap (11), the support (12) is clamped and fixed in the knob switch cap (11) through the mounting column (13), and the support (12) is fixedly connected to the bottom of the knob switch cap (11).

7. A gamepad, characterized in that The game handle comprises a top knob, a circuit board (3) and a top shell (4) according to any one of claims 1-6; the circuit board (3) is fixed in the top shell (4), a plurality of contacts (31) are arranged on the circuit board (3), the plurality of contacts (31) are arranged in a ring, and the plurality of contacts (31) are arranged below the side of the spring sheet (2); The top shell (4) comprises a through hole structure (41), a limiting bone (42) and a plurality of empty areas (43), the first end of the top knob passes through the through hole structure (41) and is exposed outside the top shell (4), the second end of the top knob is clamped on the top shell (4), and the top knob is movably connected with the top shell (4); the limiting bone (42) is fixed on the edge of the through hole structure (41), and the limiting bone (42) is used for stopping the top knob; a plurality of empty areas (43) are arranged on the side of the through hole structure (41), and the empty areas (43) are used for gear limiting and providing gear shifting feeling.