A potentiometer

Abstract

The present invention discloses a potentiometer, which includes a housing, a speed change mechanism disposed within the housing, a driving rotating shaft for driving the speed change mechanism, and a signal control mechanism for outputting a potential signal. The signal control mechanism includes a contact component for generating an electrical signal and a code disk for triggering the contact component. At least one of the code disks is driven by the speed change mechanism. Wherein, the code disk is provided with a plurality of signal trigger rings corresponding to the contact component one by one, and each of the signal trigger rings is respectively provided with a preset number of protrusions to press and trigger the contact component. By adopting the present invention, the structure is simple, the volume is small, it can be applied to the output of digital signals, has a large number of gears and good controllability.

Description

Technical Field

[0001] The present invention relates to the technical field of potentiometers, and particularly to a potentiometer. Background Art

[0002] Existing traditional potentiometers generally mostly adopt a structure of brush contact, which generally includes a wire-wound resistor body, a sliding brush, a rotating shaft, etc. The brush slides on it to detect and output the voltage at the position where the brush is located, so as to detect the angle information, showing a linear change, and it is difficult to be converted into the digital signal required by the user.

[0003] For existing potentiometers with gear position adjustment, generally by setting the number of additional gear position points to meet the usage requirements, but at the same time, it will increase the size of the potentiometer. And based on the conventional production size of the potentiometer, the number of additional gear position points is limited. At the same time, a large increase in the number of gear position points will cause the gear position change to be too sensitive when manually adjusting the potentiometer by turning, and the manual adjustment has poor controllability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a potentiometer with a simple structure, small size, applicable to the output of digital signals, having a large number of gear positions and good controllability.

[0005] To solve the above technical problem, the present invention provides a potentiometer, which includes a housing, a speed-changing mechanism arranged in the housing, a driving rotating shaft for driving the speed-changing mechanism, and a signal control mechanism for outputting a potential signal. The signal control mechanism includes a contact component for generating an electric signal and a code disk for triggering the contact component, and at least one of the code disks is driven by the speed-changing mechanism;

[0006] Wherein, the code disk is provided with a plurality of signal trigger circles corresponding to the contact component one by one, and each of the signal trigger circles is provided with a respective preset number of protrusions to press and trigger the contact component.

[0007] As an improvement of the above solution, at least 2 code disks are provided. One code disk is directly driven by the driving rotating shaft, and other code disks are driven by the speed-changing mechanism;

[0008] The code disk with a rotation speed greater than that of the driving rotating shaft is a high-order code disk, and other code disks are low-order code disks.

[0009] As an improvement of the above solution, the speed-changing mechanism includes a planet carrier, planet gears arranged on the planet carrier, and a gear ring meshing with the planet gears. The driving rotating shaft is provided with a gear shaft meshing with the planet gears;

[0010] The high-order code disk is arranged on the planet carrier to rotate following the planet carrier;

[0011] The low - level code disk is arranged on the gear shaft and rotates with the gear shaft.

[0012] As an improvement of the above solution, the contact component includes a normally - open contact for triggering a preset electrical signal and a reset elastic piece for being pressed by the protrusion. The reset elastic piece is provided with a moving contact for electrically connecting with the normally - open contact. The protrusion presses the reset elastic piece to electrically connect the moving contact with the normally - open contact, so as to output a preset electrical signal.

[0013] As an improvement of the above solution, a circuit board for installing the contact component is provided inside the housing, and a touch - feeling feedback mechanism for feedbacking touch feeling is provided on the circuit board;

[0014] The touch - feeling feedback includes a touch - feeling housing, a spring provided inside the touch - feeling housing, and a touch - feeling head. The low - level code disk is provided with a touch - feeling circle, and a tooth - shaped surface corresponding to the touch - feeling head is provided inside the touch - feeling circle. The touch - feeling head presses against the tooth - shaped surface through the spring.

[0015] As an improvement of the above solution, a circuit board for installing the contact component is provided inside the housing, and the circuit board is located between the high - level code disk and the low - level code disk;

[0016] Both the upper and lower surfaces of the circuit board are provided with the contact components to respectively correspond to and contact the signal trigger circles of the high - level code disk and the low - level code disk.

[0017] As an improvement of the above solution, each contact component is provided with at least 2 normally - open contacts, and the reset elastic piece is provided with moving contacts corresponding to the normally - open contacts one by one;

[0018] Or the contact component further includes a normally - closed contact. The combination of the normally - closed contact and the normally - open contact is a signal contact group. Each contact component is provided with at least 2 groups of the signal contact groups, and the reset elastic piece is provided with moving contacts corresponding to the signal contact groups one by one.

[0019] As an improvement of the above solution, the speed - change ratio of the speed - change mechanism is 2 to the power of n, and n≥1, n is an integer;

[0020] The number of protrusions of the signal trigger circle is 2 to the power of m, and m≥0, m is an integer.

[0021] As an improvement of the above solution, the code disk is provided with a plurality of signal trigger circles from the inside to the outside. A is the number of signal trigger circles provided on the code disk, and a is the sequence number of the signal trigger circles arranged in sequence from the inside to the outside on the code disk;

[0022] The number of protrusions of the a - th signal trigger circle is 2 to the power of (a - 1).

[0023] As an improvement of the above solution, the speed ratio of the speed change mechanism is B, the value of B is 2 to the power of n, and n≥1, where n is an integer;

[0024] The number of signal trigger rings provided on the high-position code disk is n.

[0025] As an improvement of the above solution, the protrusions are evenly distributed within their respective signal trigger rings, and the a-th signal trigger ring is divided into 2 to the power of a equal parts, and each protrusion provided on the a-th signal trigger ring occupies one equal part.

[0026] Whenever the a-th signal trigger ring rotates through an angle of two equal parts of it, the contact component corresponding to the (a - 1)-th signal trigger ring will pass through the pressing or releasing of the protrusion once.

[0027] As an improvement of the above solution, the code disk is provided with a code table wall for setting the signal trigger rings, and the signal trigger rings are distributed on the outer side of the code table wall from top to bottom.

[0028] Implementing the present invention has the following beneficial effects:

[0029] The present invention discloses a potentiometer, which includes a housing, a speed change mechanism, a driving rotating shaft for driving the speed change mechanism, and a signal control mechanism for outputting a potential signal. The signal control mechanism includes a contact component for generating an electrical signal and a code disk for triggering the contact component. At least one of the code disks is driven by the speed change mechanism. Therefore, when the user turns the driving rotating shaft, the speed ratio between the driving rotating shaft and the code disk can be changed, thereby solving the problem that the gear adjustment is too sensitive, and at the same time improving the controllability of the user for adjusting the potential signal.

[0030] Moreover, the code disk is provided with a plurality of signal trigger rings corresponding to the contact components one by one, and each of the signal trigger rings is respectively provided with a preset number of protrusions to press and trigger the contact component, thereby forming a change in the potential signal. Therefore, the potential signals of all the contact components can be integrated and arranged to output a string of digital control signals that can communicate with external electronic devices. Or different resistance values can be output in combination with a resistance network.

[0031] At the same time, compared with simply increasing the number of adjustment gear points in the prior art, by increasing the number of signal trigger rings, the permutation and combination results of the contact components can be geometrically increased, thereby obtaining a large adjustment range. Description of the Drawings

[0032] Figure 1 is an exploded structural schematic diagram of the potentiometer according to the first embodiment of the present invention;

[0033] Figure 2 is a structural schematic diagram of the contact component and the tactile feedback mechanism according to the first embodiment of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the contact component of the present invention;

[0035] Figure 4 It is a schematic structural diagram of the low-position code disk of the first embodiment of the present invention;

[0036] Figure 5 It is a schematic structural diagram of the low-position code disk of the first embodiment of the present invention from another angle;

[0037] Figure 6 It is a schematic structural diagram of the high-position code disk of the first embodiment of the present invention;

[0038] Figure 7 It is a schematic cross-sectional structural diagram of the tactile feedback mechanism of the first embodiment of the present invention;

[0039] Figure 8 It is an example diagram of the application circuit of the contact component of the present invention;

[0040] Figure 9 It is an example diagram of the application circuit of the contact component of the present invention

[0041] Figure 10 It is a schematic structural diagram of the interior of the housing of the second embodiment of the present invention;

[0042] Figure 11 is Figure 10 a schematic structural diagram from another angle;

[0043] Figure 12 is Figure 10 a schematic cross-sectional structural diagram. Detailed implementation manners

[0044] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Referring to Figure 1 and Figure 2 , which is the first embodiment of the present invention, a potentiometer includes a housing 1, a speed-changing mechanism 2 disposed in the housing 1, a driving rotating shaft 3 for driving the speed-changing mechanism 2, and a signal control mechanism for outputting a potential signal. The signal control mechanism includes a contact component 4 for generating an electrical signal and a code disk for triggering the contact component 4, and at least one of the code disks is driven by the speed-changing mechanism 2;

[0046] Among them, the code disk is provided with a plurality of signal trigger rings 51 corresponding one-to-one to the contact component 4, and each of the signal trigger rings 51 is provided with a respective preset number of protrusions 52 to press and trigger the contact component 4.

[0047] Specifically, in combination withFigure 4 , Figure 5 and Figure 6 , the code disk is provided with at least two. One code disk is directly driven by the driving rotating shaft 3, and the other code disks are driven by the speed change mechanism 2. All the code disks rotate around the driving rotating shaft 3.

[0048] For convenience of description, the code disk with a rotation speed greater than that of the driving rotating shaft 3 is the high-position code disk 5b, and the other code disks, that is, the code disks with a rotation speed less than or equal to that of the driving rotating shaft 3 are the low-position code disks 5a. Moreover, in order to facilitate the distinction of the setting positions of the signal trigger rings in the code disks, Figure 5 and 6 dotted lines are used for division in the figure.

[0049] The speed change mechanism 2 includes a planet carrier 21, planet gears 22 arranged on the planet carrier 21, and a ring gear 23 meshing with the planet gears 22. The driving rotating shaft 3 is provided with a gear shaft 31 meshing with the planet gears 22, and the ring gear 23 is fixed on the inner wall of the housing 1. The planet carrier 21 is provided with a planet rotating shaft 211 for installing the planet gears 22, and the planet gears 22 are installed on the planet rotating shaft 211. The high-position code disk 5b is connected to one end of the planet rotating shaft 211 to rotate following the planet carrier 21; preferably, there are 3 planet rotating shafts 211 and planet gears 22 respectively,

[0050] A driving hole 51a matching with the gear shaft 31 is provided at the center of the low-position code disk 5a, and one end of the gear shaft 31 is embedded into the driving hole 51a to drive the rotation of the low-position code disk 5a. Therefore, when the driving rotating shaft 3 rotates, the rotation speed of the high-position code disk 5b is less than that of the low-position code disk 5a, and the rotation speed ratio of the two conforms to the speed change ratio of the speed change mechanism 2.

[0051] Regarding the driving of the speed change mechanism by the driving rotating shaft 3, according to the usage requirements, the driving rotating shaft 3 can be connected to the planet carrier 21 to actively drive the rotation of the planet carrier 21, and drive the rotation of the gear shaft 31 through the speed increase of the speed change mechanism. Correspondingly, the gear shaft 31 is provided with a through hole to avoid being directly driven by the driving rotating shaft 3. Or, the driving rotating shaft 3 is connected to the gear shaft 31 to actively drive the rotation of the gear shaft 31, and drive the rotation of the planet carrier 21 through the speed reduction of the speed change mechanism.

[0052] For the control of the change of the electric signal, see Figure 3, the contact assembly 4 includes a normally closed contact 41 for triggering a preset electrical signal, a normally open contact 42, and a reset spring piece 43 for the protrusion 52 to press. The reset spring piece 43 is provided with a moving contact 44 for electrically connecting with the normally closed contact 41 or the normally open contact 42. Therefore, when the moving contact 44 contacts the normally open contact 42 or the normally closed contact 41, different electrical signals can be generated. For example, when the code disk rotates, the protrusion 52 will press the reset spring piece 43, causing the moving contact 44 to first disconnect the electrical connection with the normally closed contact 41 and then electrically connect with the normally open contact 42 to output another preset electrical signal. For the convenience of description, the electrical signals generated when the moving contact 44 contacts the normally open contact 42 or the normally closed contact 41 are respectively "1" and "0".

[0053] It should be noted that for the setting of the normally closed contact 41, it can be set or not set according to the requirements of the use function. When the normally closed contact 41 is not set, when the moving contact 44 is in a disconnected state from the normally open contact 42, the default generated electrical signal is "0" or "1". When the moving contact 44 is electrically connected to the normally open contact 42, another electrical signal state can be output.

[0054] Moreover, in order to appropriately reduce the resistance when the code disk rotates and facilitate the protrusion 52 to press down the reset spring piece 43, the reset spring piece 43 is provided with a pressing guide portion 45 for contacting the protrusion 52, and the pressing guide portion 45 is provided with an inclined guide surface 451; both sides of the protrusion 52 are provided with inclined surfaces 521 corresponding to the guide surface 451. Thus, when the pressing guide portion 45 contacts and collides with the side of the protrusion 52, the guiding between the inclined surface 521 and the guide surface 451 is beneficial to the protrusion 52 pressing down the reset spring piece 43. Preferably, the pressing guide portion 451 is in the shape of a triangular prism.

[0055] To simplify the structure of this embodiment, a circuit board 6 for mounting the contact assembly 4 is provided inside the housing 1, and the circuit board 6 is located between the high-position code disk 5b and the low-position code disk 5a; the electrical signal generated by the contact assembly 4 is transmitted to an external device through the processing of the circuit board 6. The circuit board 6 is a conventional circuit board, which is prior art, and its structural principle will not be described one by one here.

[0056] The contact assemblies 4 are provided on both the upper and lower surfaces of the circuit board 6 to respectively correspond to and contact the signal trigger rings 51 of the high-position code disk 5b and the low-position code disk 5a.

[0057] Regarding the working principle of the signal control mechanism, each signal trigger ring 51 on the code disk is equivalent to outputting one bit of electrical signal, such as Figure 5As shown, there are 6 circles of the signal trigger circles 51 on the code disk, and the circuit board 6 is correspondingly provided with 6 contact components 4 that correspond to them one by one. When the protrusion 52 of the signal trigger circle 51 of this circle presses against its corresponding contact component 4, the electrical signal of this contact component 4 will change from "0" to "1".

[0058] Furthermore, in order to enable each of the signal trigger circles 51 to combine into a string of control signals that conform to the binary system of digital communication, the number of protrusions 52 of the signal trigger circle 51 is 2 to the power of m, where m is greater than or equal to 1 and m is an integer. That is, the number of protrusions of all the signal trigger circles 51 conforms to the rule of 2 to the power of m.

[0059] The code disk is provided with multiple signal trigger circles 51 from the inside to the outside. A is the number of signal trigger circles 51 on the code disk, and a is the serial number of the signal trigger circle 51 arranged in sequence from the inside to the outside on the code disk; therefore, the number of protrusions 52 provided on the a-th signal trigger circle 51 is 2 to the power of (a - 1).

[0060] As Figure 5 shown, the low-order code disk 5a is provided with 6 circles of the signal trigger circles 51, and the numbers of protrusions 52 provided on the signal trigger circles 51 from the 1st to the 6th are 1, 2, 4, 8, 16, and 32 respectively.

[0061] As Figure 6 shown, the high-order code disk 5b is provided with 3 circles of the signal trigger circles 51, and the numbers of protrusions 52 provided on the signal trigger circles 51 from the 1st to the 3rd are 1, 2, and 4 respectively.

[0062] In order to form a binary signal change relationship among the contact components 4 on the code disk, for the position distribution of the protrusions 52, the a-th signal trigger circle 51 is divided into 2 to the power of a equal parts, and each protrusion 52 provided on the a-th signal trigger circle occupies one equal part.

[0063] Whenever the a-th signal trigger circle 51 rotates through an angle of two equal parts of it, its corresponding contact component 4 will undergo a pressing and releasing of a protrusion 52 once, and the signal of the contact component 4 of this circle will change 2 times, such as a potential change from "0" to "1" and then to "0".

[0064] At the same time, the (a - 1)-th signal trigger circle 51 will rotate through an angle of one equal part of it, and its corresponding contact component 4 will undergo a pressing or releasing of a protrusion 52 once, and the signal of the contact component 4 of this circle will change 1 time, such as a potential change from "0" to "1" or from "1" to "0".

[0065] Similarly, for the low-order code disk 5a with 6 circles of signal trigger circles as Figure 4 shown, it can arrange 64 different strings of control signals.

[0066] Furthermore, based on the above design rules, the more signal trigger circles are set on the code disk, the more numerous and dense the protrusions 52 of the signal trigger circles on its periphery are. Therefore, in order to arrange more different control signals while avoiding the protrusions 52 on the code disk from being too dense for convenient processing and production.

[0067] The speed ratio of the speed change mechanism 2 is 2 to the power of n, where n ≥ 1 and n is an integer; with such a setting of the speed ratio, the contact components 4 of the high-position code disk 5b and the contact components 4 of the low-position code disk 5a can be combined to generate a string of control signals conforming to binary in digital communication.

[0068] That is, when the speed ratio is 2, when the low-position code disk 5a rotates one full circle, the contact component 4 corresponding to the outermost signal trigger circle 51 of the high-position code disk 5b will generate a signal change, such as a potential change from "0" to "1" or from "1" to "0".

[0069] Similarly, the speed ratio of the speed change mechanism 2 is B, the value of B is 2 to the power of n, where n ≥ 1 and n is an integer; the number of signal trigger circles 51 provided on the high-position code disk 5b is n. For example, when the speed ratio of the speed change mechanism 2 is 8, the value of n is 3, the number of signal trigger circles 51 provided on the high-position code disk 5b is 3, and the number of protrusions 52 provided on the 1st to 3rd signal trigger circles 51 are 1, 2, and 4 respectively, and the circuit board 6 is correspondingly provided with 3 contact components 4. Therefore, when the low-position code disk 5a rotates one full circle, the contact component 4 corresponding to the outermost signal trigger circle 51 of the high-position code disk 5b will generate a signal change, such as a potential change from "0" to "1" or from "1" to "0".

[0070] Therefore, the control signals generated by the contact components 4 of the high-position code disk 5b and the contact components 4 of the low-position code disk 5a respectively can be combined to generate a string of control signals conforming to binary in digital communication.

[0071] On the other hand, in order to improve the user's sense of control, a touch feedback mechanism 7 for feedback touch is provided on the circuit board 6; the touch feedback mechanism 7 includes a touch housing 71, a spring 72 provided in the touch housing 71, and a touch head 73. The low-position code disk 5a is provided with a touch circle 52a, and a tooth-shaped surface 53a corresponding to the touch head 73 is provided on the inner side of the touch circle 52a. The touch head 73 is pressed against the tooth-shaped surface 53a by the spring 72. Therefore, whenever the low-position code disk 5a rotates, the teeth of the tooth-shaped surface 53a will continuously press and collide with the touch head 73, so that when the user rotates the driving rotating shaft 3, a sense of paragraph can be felt, thereby knowing the rotation amplitude. Preferably, the touch head 73 is spherical, and more preferably, the touch head is a steel ball.

[0072] Accordingly, the number of teeth of the toothed surface 53a is 2 to the power of A, that is, equal to the number of protrusions 52 on the outermost ring of the low-position code disk 5a.

[0073] In terms of application, in order to synchronously transmit the signals generated by the contact component 4 to different electronic devices, such as the left and right channel signals of a stereo. The combination of the normally closed contact 41 and the normally open contact 42 is a signal contact group, and each contact component 4 is provided with at least 2 groups of the signal contact groups. The reset spring piece 43 is provided with a moving contact 44 corresponding to each signal contact group. So that when the reset spring piece 43 is pressed or released, it can ensure that the signal changes of each signal contact group occur simultaneously.

[0074] In summary, for the convenience of understanding the control signals generated by the contact component 4 of the high-position code disk 5b and the contact component 4 of the low-position code disk 5a respectively, a string of control signals conforming to binary in digital communication is combined. When the low-position code disk 5a is provided with 6 signal trigger rings 51, the high-position code disk 5b is provided with 3 signal trigger rings. Refer to Figure 8 the circuit diagram shown. Since the high-position code disk rotates slower relative to the low-position code disk, the electrical signals generated by the high-position code disk are more in line with expressing the high bits in binary. Output a 9-bit binary string, "111 000000", where the first three bits are controlled and output by the high-position code disk, and the last 6 bits are controlled and output by the low-position code disk.

[0075] On the other hand, the contact component 4 of the high-position code disk 5b and the contact component 4 of the low-position code disk 5a each generate on-off to output different switch combination states, especially as a on-off structure for controlling a resistance network, such as Figure 9 shown, by changing the switch on-off combination to output different resistance values.

[0076] Refer to Figure 10 、 11 and 12, the present invention also discloses a second embodiment of the potentiometer. Different from the first embodiment, the installation positions of the signal trigger ring 51 and the protrusions 52 provided thereon are different.

[0077] Specifically, the code disk is provided with a code table wall 5c for setting the signal trigger ring. The signal trigger rings 51 are distributed on the outside of the code table wall 5c from top to bottom, corresponding to the order of the signal trigger rings 51 on the code disk from inside to outside in the first embodiment. Accordingly, the contact component is arranged on the inner side wall of the housing 1 to contact the protrusions 52 on the code table wall 5c when the code disk rotates.

[0078] For the speed change mechanism, differently, the speed change mechanism 2 includes a speed change gear 22A and a gear ring 22B meshing with the speed change gear 22A, and the speed change gear 22A meshes with the gear ring 22B and a gear shaft 31 respectively. Preferably, the gear ring 22B and the high-position code disk are of an integral structure and are in a cylindrical structure, so that the speed change gear 22A can be supported on the low-position code disk.

[0079] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A potentiometer, characterized in that, It includes a housing, a speed change mechanism provided in the housing, a driving rotating shaft for driving the speed change mechanism, and a signal control mechanism for outputting a potential signal. The signal control mechanism includes a contact component for generating an electrical signal and a code disk for triggering the contact component. At least one of the code disks is driven by the speed change mechanism; Wherein, the code disk is provided with a plurality of signal trigger rings corresponding to the contact component one by one, and each of the signal trigger rings is provided with a respective preset number of protrusions to press and trigger the contact component; The contact component includes a normally open contact for triggering a preset electrical signal and a reset elastic sheet for the protrusion to press. The reset elastic sheet is provided with a moving contact for electrically connecting with the normally open contact. The protrusion presses the reset elastic sheet to electrically connect the moving contact with the normally open contact to output a preset electrical signal.

2. The potentiometer according to claim 1, characterized in that, At least 2 code disks are provided. One code disk is directly driven by the driving rotating shaft, and other code disks are driven by the speed change mechanism; The code disk with a speed higher than that of the driving rotating shaft is a high-level code disk, and other code disks are low-level code disks.

3. The potentiometer according to claim 2, wherein The speed change mechanism includes a planet carrier, planet gears provided on the planet carrier, and a ring gear meshing with the planet gears. The driving rotating shaft is provided with a gear shaft meshing with the planet gears; The high-level code disk is provided on the planet carrier to rotate with the planet carrier; The low-level code disk is provided on the gear shaft to rotate with the gear shaft.

4. The potentiometer according to claim 2, wherein A circuit board for installing the contact component is provided in the housing, and a touch feedback mechanism for feedbacking touch feeling is provided on the circuit board; The touch feedback includes a touch housing, a spring provided in the touch housing, and a touch head. The low-level code disk is provided with a touch ring, and a tooth-shaped surface corresponding to the touch head is provided on the inner side of the touch ring. The touch head presses against the tooth-shaped surface through the spring.

5. The potentiometer according to claim 2, wherein, The speed ratio of the speed change mechanism is 2 to the power of n, and n≥1, n is an integer; The number of protrusions of the signal trigger ring is 2 to the power of m, and m≥0, m is an integer.

6. The potentiometer according to claim 5, wherein The code disk is provided with a plurality of the signal trigger rings from the inside to the outside. A is the number of signal trigger rings provided on the code disk, and a is the sequence number of the signal trigger rings arranged from the inside to the outside on the code disk; The number of protrusions provided on the a-th signal trigger ring is 2 to the power of (a - 1).

7. The potentiometer according to claim 5, wherein The speed ratio of the speed change mechanism is B, and the value of B is 2 to the power of n, and n≥1, n is an integer; The number of signal trigger rings provided on the high-level code disk is n.

8. The potentiometer according to claim 6 or 7, characterized in that, The protrusions are evenly distributed in their respective signal trigger rings, so that the a-th signal trigger ring is divided into 2 to the power of a equal parts, and each protrusion provided on the a-th signal trigger ring occupies one equal part; Whenever the a-th signal trigger ring rotates through an angle of two equal parts of it, the contact component corresponding to the (a - 1)-th signal trigger ring will pass through the pressing or loosening of the protrusion once.

9. The potentiometer according to claim 1, characterized in that, The code disk is provided with a code table wall for setting the signal trigger rings, and the signal trigger rings are distributed on the outside of the code table wall from top to bottom.

Images