Multi-gear knob

Abstract

The invention provides a multi-gear knob which comprises a control panel and a wiring panel, a rotating shaft is arranged on the control panel, a plurality of gears are arranged around the rotating shaft, a plurality of binding posts are arranged on the wiring panel, the multi-gear knob is externally connected to a control system through the binding posts, and the multi-gear knob further comprises a time delay circuit. A power supply end and a relay switch are arranged; the trigger device is provided with a first normally open contact and a second normally open contact corresponding to each gear, the first normally open contact is connected between the power supply end of the time delay circuit and the power supply, and the power supply is controlled to supply power to the time delay circuit through the conduction state of the first normally open contact; the second type of normally open contacts are connected between the plurality of binding posts and the relay switch; when the rotating shaft is located at the positions corresponding to different gears, the first type of normally open contacts are short-circuited, and the second type of normally open contacts corresponding to the gears are short-circuited after the time delay circuit delays the set time, so that circuit paths corresponding to the gears are formed.

Description

Technical Field

[0001] This application relates to the field of input control technology, and particularly to a multi-gear knob. Background Art

[0002] In industrial automation, control systems, and embedded applications, users often need to set parameters or select modes through physical interfaces such as knobs and buttons. Programmable Logic Controllers (PLCs) and microcontrollers, as core components in control systems, often need to cooperate with external input devices to adjust control parameters or select different operation modes. Currently, in these systems, common control interfaces include knobs, buttons, touchscreens, etc.

[0003] Most of the existing knob control methods are simple single-gear or continuously rotating designs, which are difficult to meet the requirements of multi-gear precise selection. For control systems, traditional knobs have certain deficiencies in terms of accuracy, stability, and versatility. For example:

[0004] 1) Some knobs have only a single gear and cannot conveniently switch between multiple functions;

[0005] 2) During the operation of traditional knobs, users may accidentally touch non-target gears due to inaccurate hand operations or design defects of the knobs, resulting in incorrect triggering and affecting the normal operation of the device;

[0006] 3) For the need of multi-gear adjustment, existing knobs may lack clear markings, which are prone to causing operation errors. Summary of the Invention

[0007] It would be beneficial to provide a mechanism in this application to alleviate, mitigate, or eliminate at least one of the above problems.

[0008] This application provides a multi-gear knob. The multi-gear knob includes a control panel and a wiring panel. A rotating shaft is provided on the control panel, and several gears are arranged around the rotating shaft. Several wiring terminals are provided on the wiring panel. The multi-gear knob is externally connected to a control system through the several wiring terminals. The multi-gear knob further includes:

[0009] A delay circuit, which is provided with a power supply terminal and a relay switch;

[0010] A triggering device, which is provided with a first type of normally open contact and a second type of normally open contact corresponding to each gear. The first type of normally open contact is connected between the power supply terminal of the delay circuit and the power supply, and the power supply for the delay circuit is controlled by the conduction state of the first type of normally open contact. The second type of normally open contact is connected between the several wiring terminals and the relay switch;

[0011] When the rotating shaft is at the positions corresponding to different gears, the first type of normally open contact is short-circuited. After the set time delay of the delay circuit, the second type of normally open contact corresponding to the gear is also short-circuited, forming a circuit path corresponding to the gear.

[0012] Optionally, the triggering device includes a fixed ring group and a trigger member, and the first type of normally open contact and the second type of normally open contact are arranged on the fixed ring group;

[0013] The trigger member is fixedly connected to the rotating shaft, and the rotating shaft drives the trigger member to rotate around the central axis of the fixed ring group. When the rotating shaft is at the positions corresponding to different gears, the trigger member short-circuits the first type of normally open contact and the second type of normally open contact corresponding to the gear.

[0014] Optionally, the first type of normally open contact and the second type of normally open contact have the same structure, including a static contact and a moving contact. The static contact is arranged on the fixed ring group, and the moving contact is suspended above the static contact through an elastic connecting member to form a normally open contact through the elastic connecting member.

[0015] Optionally, the trigger member is a linear trigger member, and the first type of normally open contact and the second type of normally open contact corresponding to each gear are located on the same straight line.

[0016] Optionally, the fixed ring group includes at least two concentric fixed rings. The first type of normally open contact is distributed on the inner fixed ring, and the second type of normally open contact is distributed on the outer fixed ring.

[0017] Optionally, the multi-gear knob is provided with 2 N gears, and the outer fixed ring includes N concentric sub-rings, and the second type of normally open contact is distributed on the N concentric sub-rings.

[0018] Optionally, the relay switch has N contacts. One end of the second type of normally open contact located on each concentric sub-ring is connected to one end of the corresponding contact of the relay switch, and the other end of the corresponding contact of the relay switch is connected to the corresponding terminal of the wiring panel.

[0019] Optionally, the delay circuit further includes a capacitor, a resistor, a triode, and a diode;

[0020] The emitter of the triode and one end of the capacitor are grounded. The other end of the capacitor is connected to the base of the triode. The positive electrode of the diode, the resistor, and one end of the relay switch are respectively connected to the base of the triode. The negative electrode of the diode, the resistor, and the other end of the relay switch serve as the power supply terminal and are connected to the second end of the first type of normally open contact. The power supply is connected to the first end of the first type of normally open contact.

[0021] Optionally, one of the several terminal posts on the wiring panel is the power supply common terminal, and the remaining terminal posts are respectively connected to different signal input terminals of the control system. The second end of the second type of normally open contact is connected to the power supply common terminal.

[0022] Optionally, the multi - gear knob further includes a conduction table, which records the correspondence between each gear and the conduction state of each signal input terminal of the control system.

[0023] According to an exemplary embodiment of the present application, the embodiment of the present application adopts a design scheme integrating mechanical and electronic control. Through a delay circuit, an anti - jitter function with a preset duration is realized to avoid mis - triggering problems, and the precise control ability of multiple gears is achieved. It can meet the requirements of various application scenarios such as PLC input signal selection and single - chip microcomputer working mode switching. Moreover, it adopts a modular structure design, which is convenient for installation and maintenance. The embodiment of the present application not only has strong anti - interference performance, but also realizes a stable and reliable multi - gear switching function through the cooperation of a reasonable mechanical structure and an electrical control circuit, which can significantly improve the operation efficiency and user experience of the industrial automation control system, and provides an innovative solution with strong practicability and high reliability for the field of automation control.

[0024] It should be understood that the content of the invention is not used to identify the key or basic features of the embodiments of the present application, nor is it used to limit the scope of the present application. Through the following description, other features of the present application will become easily understood. Brief Description of the Drawings

[0025] By describing some embodiments of the present application in more detail in the drawings, the above - mentioned and other objects, features, and advantages of the present application will become more obvious, where:

[0026] Figure 1 Shows a simplified block diagram of a multi - gear knob according to some embodiments of the present application;

[0027] Figure 2 Shows a schematic diagram of a control panel according to some embodiments of the present application;

[0028] Figure 3 Shows a schematic diagram of a wiring panel according to some embodiments of the present application;

[0029] Figure 4 Shows a schematic diagram of a triggering device according to some embodiments of the present application;

[0030] Figure 5 Shows a schematic diagram of a normally open contact according to some embodiments of the present application;

[0031] Figure 6 Shows a schematic diagram of a delay circuit according to some embodiments of the present application;

[0032] In the figure: 100 - control panel, 110 - panel, 111 - gear position, 120 - rotating head, 130 - rotating rod, 200 - wiring panel, 210 - terminal, 211 - first terminal, 212 - second terminal, 213 - third terminal, 300 - triggering device, 310 - trigger, 320 - inner fixing ring, 331 - outermost fixing ring, 332 - second outermost fixing ring, 333 - second innermost fixing ring, 340 - first type of normally open contact, 350 - second type of normally open contact, 400 - delay circuit, 410 - power supply terminal, 420 - first contact of relay switch KA1, 430 - second contact of relay switch KA1, 440 - third contact of relay switch KA1, 500 - power supply. Detailed implementation manners

[0033] Now, the principles of the present application will be described with reference to some embodiments. It should be understood that the description of these embodiments is only for the purpose of illustration and to help those skilled in the art understand and implement the present application, without imposing any limitation on the scope of the present application. The disclosure described herein can be implemented in a manner different from that described below.

[0034] In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0035] References to "one embodiment", "embodiment", "exemplary embodiment", etc. in the present application indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes specific features, structures or characteristics. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in connection with an exemplary embodiment, whether explicitly described or not, those skilled in the art will be aware of such feature, structure or characteristic in connection with other embodiments.

[0036] It should be understood that although terms such as "first" and "second" may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the exemplary embodiments, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. As used herein, the term "and / or" includes any and all combinations of one or more of the listed terms.

[0037] The terms used herein are only for the purpose of describing particular embodiments and are not intended to be limiting of the exemplary embodiments. The singular forms "a", "an" and "the" used herein also include the plural forms unless the context clearly indicates otherwise. As used herein, "a set of elements" or "a collection of elements" is intended to include one or more elements. It should also be understood that the terms "comprises", "comprising", "has", "having", "includes" and / or "including", when used herein, specify the presence of the stated features, elements and / or components, etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.

[0038] As used in this application, the term "circuit" may refer to one or more or all of the following:

[0039] (a) Only hardware circuit implementations (e.g., only implemented in analog and / or digital circuits)

[0040] (b) A combination of hardware circuits and software, e.g., (as applicable):

[0041] (i) A combination of analog and / or digital hardware circuits and software / firmware; and

[0042] (ii) Any portion of a hardware processor (including a digital signal processor) with software and memory, which work together to enable a device such as a mobile phone or a server to perform various functions, and

[0043] (c) A hardware circuit and / or a processor, e.g., a microprocessor or a part of a microprocessor, which requires software (e.g., firmware) to operate, but the software may be absent when it is not required to operate.

[0044] The definition of the circuit applies to all uses of the term in this application, including in any claim. As another example, as used in this application, the term circuit also includes implementations that are only hardware circuits or processors (or multiple processors) or parts of hardware circuits or processors and their (or their) accompanying software and / or firmware. The term circuit also includes, for example, a baseband integrated circuit or a processor integrated circuit for a mobile device, or a similar integrated circuit in a server, a cellular network device, or other computing network devices, if applicable to a particular claim element.

[0045] To make the objectives, features, and beneficial effects of this technical solution more obvious and understandable, a detailed description will be given below with reference to the accompanying drawings.

[0046] An embodiment of this application provides a multi-gear knob, as Figure 1 shown, the multi-gear knob includes a control panel 100 and a wiring panel 200.

[0047] A rotating shaft is provided on the control panel 100, and several gears are arranged around the rotating shaft.

[0048] In some embodiments, as Figure 2 shown, the control panel 100 includes a panel 110 and several gears 111 provided on the outer surface of the panel 110. The rotating shaft includes a rotating head 120 and a rotating rod 130. One end of the rotating head 120 is the gear control part of the control panel, which is the part contacted by the user and is used to specify the required gear 111. The other end of the rotating head 120 is fixedly connected to the rotating rod 130, and the rotating head 120 drives the rotating rod 130 to rotate around its central axis.

[0049] Several terminal posts 210 are provided on the wiring panel 200, and the multi-gear knob is externally connected to a control system through the several terminal posts 210.

[0050] In some embodiments, one of the several terminal posts 210 on the wiring panel 200 is a power common terminal, and the remaining terminal posts are respectively connected to different signal input ends of the control system. The second end of the second type of normally open contact is connected to the power common terminal.

[0051] As Figure 3As shown, four terminals 210 are provided on the wiring panel 200. One of the terminals is the power common terminal (i.e., the COM terminal), and the other three terminals are the first terminal 211, the second terminal 212, and the third terminal 213 respectively. The first terminal 211 is connected to the first signal input end of the control system. The second terminal 212 is connected to the second signal input end of the control system. The third terminal 213 is connected to the third signal input end of the control system. The COM terminal of the wiring panel 200 is connected to the power supply end of the control system.

[0052] In some embodiments, a status indicator light may also be provided on the wiring panel 200. For example, an LED light is provided to display the conduction status of each terminal through the status indicator light.

[0053] It is worth noting that the control panel and the wiring panel in the embodiments of the present application may be the side plates of the housing of the multi - gear knob. The two may be provided on the same side of the housing or on different sides.

[0054] Aiming at the problem of accidental triggering of the multi - gear knob in the prior art, the multi - gear knob in the embodiments of the present application further includes:

[0055] A delay circuit 400, provided with a power supply end 410 and a relay switch;

[0056] A trigger device 300, provided with a first type of normally open contact 340 and a second type of normally open contact 350 corresponding to each gear. The first type of normally open contact 340 is connected between the power supply end of the delay circuit 400 and the power supply 500. The power supply 500 supplies power to the delay circuit 400 through the conduction state of the first type of normally open contact 340. The second type of normally open contact 350 is connected between the several terminals and the relay switch;

[0057] When the rotating shaft is at the position corresponding to different gears, the first type of normally open contact 340 is short - circuited. After the delay circuit 400 delays for a set time, the second type of normally open contact 350 corresponding to the gear is also short - circuited, forming a circuit path corresponding to the gear.

[0058] Thus, the embodiment of the present application adopts a design scheme integrating machinery and electronic control, realizes the anti-jitter function with a preset duration through a delay circuit, avoids the problem of mis-triggering, and has achieved the precise control ability of multiple gears, which can meet the requirements of various application scenarios such as PLC input signal selection and single-chip microcomputer working mode switching. Moreover, it adopts a modular structure design, which is convenient for installation and maintenance. The embodiment of the present application not only has strong anti-interference performance, but also realizes a stable and reliable multi-gear switching function through the cooperation of a reasonable mechanical structure and an electrical control circuit, which can significantly improve the operation efficiency and user experience of the industrial automation control system, and provides an innovative solution with strong practicability and high reliability for the field of automation control.

[0059] In some embodiments, as Figure 4 shown, the triggering device 300 includes a fixed ring group (320, 331, 332, 333) and a triggering member 310, and the first type of normally open contact 340 and the second type of normally open contact 350 are arranged on the fixed ring group;

[0060] The triggering member 310 is fixedly connected to the rotating shaft, and the rotating shaft drives the triggering member 310 to rotate around the central axis of the fixed ring group. When the rotating shaft is at the position corresponding to different gears, the triggering member 310 shorts the first type of normally open contact 340 and the second type of normally open contact 350 corresponding to the gear.

[0061] In some embodiments, the first type of normally open contact 340 and the second type of normally open contact 350 have the same structure, as Figure 5 described, each normally open contact includes a stationary contact 341 and a moving contact 342. The stationary contact 341 is arranged on the fixed ring group, and the moving contact 342 is suspended above the stationary contact 341 through an elastic connecting member 343, and a normally open contact is formed through the elastic connecting member 343. Optionally, the elastic connecting member is a spring.

[0062] When the rotating shaft rotates to drive the triggering member 310 to rotate to a certain gear position, the triggering member exerts a downward force on the moving contact of the corresponding contact, and the elastic connecting member 343 is compressed under the pressure, and the moving contact contacts the stationary contact, forming a short-circuit state.

[0063] It should be noted that the fixed ring group in the embodiment of the present application is an insulator.

[0064] In some embodiments, the triggering member 310 is a linear triggering member, such as a triggering rod, a triggering column, etc., and the first type of normally open contact 340 and the second type of normally open contact 350 corresponding to each gear are on the same straight line.

[0065] In some embodiments, the fixed ring group includes at least two concentric fixed rings. The first type of normally open contacts 340 are distributed on the inner fixed ring 320, and the second type of normally open contacts 350 are distributed on the outer fixed rings (331, 332, 333).

[0066] In some embodiments, the multi - gear knob is provided with 2 N gears. The outer fixed ring includes N concentric sub - rings, and the second type of normally open contacts are distributed on the N concentric sub - rings. N is a positive integer greater than 1. Optionally, N = 3.

[0067] In some embodiments, as Figure 6 shown, the delay circuit further includes a capacitor C1, a resistor R1, a triode Q1, and a diode D1;

[0068] The emitter of the triode Q1 and one end of the capacitor C1 are grounded. The other end of the capacitor C1 is connected to the base of the triode Q1. The positive electrode of the diode D1 and one end of the resistor R1 are respectively connected to the base of the triode Q1. One end of the relay switch KA1 is connected to the collector of the triode Q1. The negative electrode of the diode D1, the other end of the resistor R1, and the other end of the relay switch KA1 serve as the power supply terminal 41 and are connected to the second end of the first type of normally open contacts 340. The power supply 500 is connected to the first end of the first type of normally open contacts 340.

[0069] In Figure 6 the shown delay circuit, if the capacitor C1 is 47 μF, the resistor R1 is 100 kΩ, the triode Q1 is S8050 (NPN, V = 0.7V), the diode D1 is 1N4007, and VCC is 12V, through the delay calculation formula t=-RCln((E - V) / E), the calculated t≈0.282 seconds.

[0070] It should be noted that the delay time of the delay circuit in this embodiment can be designed according to the control accuracy, and the delay time of the delay circuit is related to the parameters of the related electrical components of the delay circuit. In other embodiments, the delay circuit can also adopt other forms of RC delay circuits, and the embodiments of the present application do not make special restrictions on this.

[0071] Taking a knob with 8 gears as an example, the fixed ring group is provided with a total of 4 concentric rings. 7 first - type normally open contacts are arranged on the inner fixed ring 320, which are respectively denoted as N, P, Q, I, S, T, M. Among them, the 0 - gear corresponds to the non - working state, and the corresponding first - type normally open contacts and second - type normally open contacts do not need to be set. Four second - type normally open contacts A, D, G, J are arranged on the outermost fixed ring 331, four second - type normally open contacts B, C, I, K are arranged on the second - outermost fixed ring 332, and four second - type normally open contacts E, F, H, L are arranged on the second - innermost fixed ring 333.

[0072] As shown Figure 5 and Figure 6 in the figure, each normally open contact includes a first end on the left side and a second end on the right side. In the embodiments of the present application, the second ends of the above 12 second-type normally open contacts are all connected to the COM terminal of the wiring panel. The first ends of the four second-type normally open contacts on the outermost fixing ring 331 are all connected to one end of the first contact 420 of the relay switch, that is, A1, D1, G1, and J1 are all connected to the upper end of the first contact 420 of the relay switch KA1; the first ends of the four second-type normally open contacts on the second outermost fixing ring 332 are all connected to one end of the second contact 430 of the relay switch, that is, B1, C1, I1, and K1 are all connected to the upper end of the second contact 430 of the relay switch KA1; the first ends of the four second-type normally open contacts on the second innermost fixing ring 333 are all connected to one end of the third contact 440 of the relay switch, that is, E1, F1, H1, and L1 are all connected to the upper end of the third contact 440 of the relay switch KA1.

[0073] The other end of the first contact 420 of the relay switch KA1 (that is, Figure 6 the lower end of the first contact 420 shown) is connected to the first wiring terminal 211 of the wiring panel 200. The other end of the second contact 430 of the relay switch (that is, Figure 6 the lower end of the second contact 430 shown) is connected to the second wiring terminal 212 of the wiring panel 200. The other end of the third contact 440 (that is, Figure 6 the lower end of the third contact 440 shown) is connected to the third wiring terminal 213 of the wiring panel 200.

[0074] The first ends of the above 7 first-type normally open contacts are all connected to the power supply 500, and the other ends are all connected to the power supply terminal 410 of the delay circuit 400. That is, N1, P1, Q1, I1, S1, T1, and M1 are all connected to the Figure 6 500 terminal in Figure 6 and N2, P2, Q2, I2, S2, T, and M2 are all connected to the

[0075] In some embodiments, the multi-gear knob further includes a conduction table, which records the correspondence between the conduction states of each gear and each signal input terminal of the control system.

[0076] Taking the knob with 8 gears as an example, the conduction table is shown in Table 1 below:

[0077] Gear position First input terminal Second input terminal Third input terminal 0 Non-conducting Non-conducting Non-conducting 1 Conducting Non-conducting Non-conducting 2 Non-conducting Conducting Non-conducting 3 Conducting Conducting Non-conducting 4 Non-conducting Non-conducting Conducting 5 Conducting Non-conducting Conducting 6 Non-conducting Conducting Conducting 7 Conducting Conducting Conducting

[0078] Taking an eight - gear knob from 0 to 7, which is connected to three signal input terminals I0.1, I0.2, and I0.3 of the PLC control system as an example, the conduction circuit corresponding to gear 1 will be specifically described below.

[0079] Connect the three signal input terminals I0.1, I0.2, and I0.3 of the PLC to Figure 3 the first terminal 211, the second terminal 212, and the third terminal 21 of the wiring panel 200 shown respectively, and connect the common terminal of the PLC to Figure 3 the COM terminal of the wiring panel 200 shown.

[0080] Rotate Figure 2 the rotating head 120 of the control panel 100 shown, so that the rotating head 120 points to gear 1. The rotating rod 130 starts to rotate under the drive of the rotating head 120 and drives Figure 4 the trigger 310 of the trigger device 300 shown to rotate.

[0081] The trigger 310 contacts the contact A on the outermost fixed ring 331 and the contact N on the inner fixed ring 320, short - circuiting between contact A1 and A2 and between contact N1 and N2 respectively, so that the two normally - open contacts of contact A and contact N are closed. Because contact N1 and N2 are short - circuited, Figure 6 the power supply terminal 410 of the delay circuit 400 shown and the power supply 500 are conducted, and the delay circuit 400 starts to work. After delaying for t seconds, the coil of the relay switch KA1 is energized, and the first contact 420, the second contact 430, and the third contact 430 of the relay switch KA1 are closed; because contact A1 and A2 are short - circuited, the first contact 420 of the delay circuit 400 is short - circuited with Figure 3 the COM terminal of the control panel 200 shown. Therefore, the signal input terminal I0.1 of the PLC passes through Figure 3 the first terminal 211 of the wiring panel 200 shown, Figure 6 the first contact 420 of the delay circuit 400 described above, Figure 4 the contacts A1 - A2 of the trigger device 400 described above, Figure 3 the COM terminal of the wiring panel 200 shown and is connected to the common terminal of the PLC, forming a loop. Finally, the signal input terminal I0.1 of the PLC is conducted, and the signal input terminals I0.2 and I0.3 are not conducted. By analogy according to this rule, the relationship between each gear and whether each input terminal of the wiring panel is conducted is obtained, that is, the conduction table shown in Table 1 above.

[0082] Based on the above - mentioned embodiments of the present application, it can be seen that the embodiments of the present application have at least the following advantages:

[0083] 1) It combines mechanical and electronic control technologies;

[0084] 2) It has an anti-shake delay function;

[0085] 3) The LED status is indicated in real time;

[0086] 4) It is applicable to scenarios such as PLC input signal selection and single-chip microcomputer working mode switching;

[0087] 5) It has good anti-interference performance;

[0088] 6) It is convenient for installation and maintenance.

[0089] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A multi-position knob, comprising a control panel and a wiring panel, wherein the control panel is provided with a rotating shaft and a plurality of gears are arranged around the rotating shaft, and the wiring panel is provided with a plurality of wiring posts, wherein the multi-position knob is externally connected to a control system through the plurality of wiring posts, characterized in that: The multi-position knob also includes: The delay circuit is provided with a power supply terminal and a relay switch; a trigger device, provided with a first type of normally open contact and a second type of normally open contact corresponding to each gear position, the first type of normally open contact being connected between the power supply end of the delay circuit and the power supply, the power supply being controlled to supply power to the delay circuit through the conduction state of the first type of normally open contact, and the second type of normally open contact being connected between the plurality of binding posts and the relay switch; When the rotating shaft is at a position corresponding to different gears, the first type of normally open contacts is short-circuited, and after the delay circuit delays for a set time, the second type of normally open contacts corresponding to the gear is also short-circuited, forming a circuit path corresponding to the gear.

2. The multi-position knob according to claim 1, characterized in that: The trigger device comprises a fixed ring group and a trigger member, and the first type of normally open contacts and the second type of normally open contacts are arranged on the fixed ring group; The trigger member is fixedly connected to the rotating shaft, and the rotating shaft drives the trigger member to rotate around the central axis of the fixed ring group. When the rotating shaft is located at a position corresponding to different gears, the trigger member short-circuits the first type normally open contact and the second type normally open contact corresponding to the gear.

3. The multi-position knob according to claim 2, characterized in that: The first type of normally open contact and the second type of normally open contact have the same structure, including a static contact and a moving contact, the static contact is arranged on the fixed ring group, and the moving contact is suspended above the static contact through an elastic connecting member, and a normally open contact is formed by the elastic connecting member.

4. The multi-position knob according to claim 2, characterized in that: The trigger member is a linear trigger member, and the first type normally open contact and the second type normally open contact corresponding to each gear position are located on the same straight line.

5. The multi-position knob according to claim 4, characterized in that: The fixing ring group includes at least two concentric fixing rings, the first type of normally open contacts are distributed on the inner fixing ring, and the second type of normally open contacts are distributed on the outer fixing ring.

6. The multi-position knob according to claim 5, characterized in that: The multi-position knob is provided with 2 N The outer fixed ring includes N concentric sub-rings, and the second type normally open contacts are distributed on the N concentric sub-rings.

7. The multi-position knob according to claim 6, characterized in that: The relay switch has N contacts, the first end of the second type normally open contact located on each concentric sub-ring is connected to one end of the corresponding contact of the relay switch, and the other end of the corresponding contact of the relay switch is connected to the corresponding terminal of the wiring panel.

8. The multi-position knob according to claim 1, characterized in that: The delay circuit also includes a capacitor, a resistor, a triode, and a diode; The emitter of the transistor and one end of the capacitor are grounded, the other end of the capacitor is connected to the base of the transistor, the positive electrode of the diode, the resistor and one end of the relay switch are respectively connected to the base of the transistor, the negative electrode of the diode, the resistor and the other end of the relay switch are connected to the second end of the first type of normally open contact as the power supply end, and the power supply is connected to the first end of the first type of normally open contact.

9. The multi-position knob according to any one of claims 1 to 8, characterized in that: One of the plurality of terminals on the wiring panel is a common terminal of the power supply, and the other terminals are respectively connected to different signal input terminals of the control system, and the second end of the second type normally open contact is connected to the common terminal of the power supply.

10. The multi-position knob according to claim 9, characterized in that: The multi-gear knob also includes a conduction table, which records the corresponding relationship between each gear and the conduction state of each signal input terminal of the control system.

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