Potentiometer type multi-position switch

Abstract

The utility model relates to a switch technical field provides a kind of potentiometer formula multi-gear switch, including adjusting mechanism;Moving contact, with the adjusting mechanism connection;Resistance body, towards the side of moving contact is equipped with multiple recess, and moving contact rotates with the adjusting mechanism and is set in the recess;PCBA board, with the resistance body connection, and the PCBA board side away from the resistance body is provided with first pin, second pin and third pin, the resistance between the first pin and the second pin is the total resistance of the resistance body, the third pin is between the first pin and the second pin, and the third pin is connected with the moving contact.The utility model provides a kind of potentiometer formula multi-gear switch, utilizes the resistance linear variation of potentiometer and exports different voltage value, and the anti-magnetic field interference performance is strong, improves the accuracy of detection.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, and in particular to a potentiometer-type multi-position switch. Background Technology

[0002] A multi-position switch is a mechanical switch that switches between different circuit connection states by rotating it. Its core function is to realize the on / off state of the circuit, function conversion or signal selection by discretely switching the positions.

[0003] In the existing technology, most sensors for multi-position switches are Hall sensors, which are often affected by magnetic fields, leading to inaccurate detection.

[0004] Therefore, how to provide a potentiometer-type multi-position switch that can improve detection accuracy is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This invention provides a potentiometer-type multi-position switch to address the shortcomings of existing Hall effect sensors that are frequently affected by magnetic fields, thereby improving detection accuracy.

[0006] This utility model provides a potentiometer-type multi-position switch, including: Adjustment mechanism; The moving contact is connected to the adjustment mechanism; The resistive element has multiple grooves on the side facing the moving contact, and the moving contact rotates with the adjusting mechanism and is engaged in the grooves; The PCBA board is connected to the resistor, and a first pin, a second pin, and a third pin are provided on the side of the PCBA board away from the resistor. The resistance between the first pin and the second pin is the total resistance of the resistor. The third pin is located between the first pin and the second pin and is connected to the moving contact.

[0007] According to the present invention, a potentiometer-type multi-position switch has two moving contacts and two third pins, and the moving contacts and the third pins are connected in a one-to-one correspondence.

[0008] According to the present invention, a potentiometer-type multi-position switch is provided, the adjusting mechanism comprising: Knob; A rotating shaft is connected to the bottom end of the knob; A rotating disk is connected to the bottom end of the rotating shaft, and the bottom of the rotating disk is connected to the moving contact.

[0009] According to the potentiometer-type multi-position switch provided by this utility model, the adjustment mechanism further includes: An elastic element, one end of which is connected to the bottom of the rotating disk, and the other end of which is connected to the moving contact.

[0010] According to the present invention, a potentiometer-type multi-position switch is provided, wherein the elastic element is a spring and the moving contact is a ball.

[0011] According to the potentiometer-type multi-position switch provided by this utility model, it also includes: The top cover has an opening at the bottom and a first inner cavity; a through hole is provided in the middle of the top cover for the rotating shaft to pass through, and the rotating disk is located in the first inner cavity; The middle cover is integrally formed with the resistor element and is located at the bottom of the upper cover; The lower cover has an opening at the top and a second inner cavity. The PCBA board is located inside the lower cover, and the first pin, the second pin, and the third pin pass through the lower cover and extend outside the lower cover.

[0012] According to the present invention, a potentiometer-type multi-position switch is provided, wherein the outer peripheries of the upper cover, the middle cover and the lower cover are flush and all are cylindrical.

[0013] According to the potentiometer-type multi-position switch provided by this utility model, it also includes: A needle roller pin is disposed on the upper cover, and the needle roller pin corresponds to the initial position of the potentiometer-type multi-position switch.

[0014] According to the present invention, a potentiometer-type multi-position switch is provided, wherein a hollow screw extends from the side of the upper cover away from the middle cover, a rotating shaft is rotatably provided on the inner side of the hollow screw, and a nut is sleeved on the outer periphery of the hollow screw.

[0015] According to the present invention, a potentiometer-type multi-position switch is provided, wherein a bushing and a sealing ring are provided between the hollow screw and the rotating shaft.

[0016] The potentiometer-type multi-position switch provided by this utility model is connected to the adjustment mechanism through a moving contact. A groove is provided on the side of the resistive element facing the moving contact. The moving contact rotates with the adjustment mechanism and is locked in the groove. The PCBA board is connected to the resistive element, and a first pin, a second pin, and a third pin are provided on the side of the PCBA board away from the resistive element. The resistance between the first pin and the second pin is the total resistance of the resistive element. The third pin is located between the first pin and the second pin and is connected to the moving contact. Different voltage values ​​are output by utilizing the linear change of the potentiometer's resistance. It has strong anti-magnetic interference performance and improves the accuracy of detection. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the potentiometer-type multi-position switch provided by this utility model.

[0019] Figure 2 This is a front view of the potentiometer-type multi-position switch provided by this utility model.

[0020] Figure 3 This is a cross-sectional view of the potentiometer-type multi-position switch provided by this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the resistor provided by this utility model.

[0022] Figure label: 1. Adjustment mechanism; 11. Knob; 12. Rotating shaft; 13. Rotating disk; 14. Elastic element; 2. Moving contact; 3. Resistor; 4. Groove; 5. PCBA board; 51. First pin; 52. Second pin; 53. Third pin; 6. Top cover; 61. Hollow screw; 62. Nut; 7. Middle cover; 8. Bottom cover; 9. Needle roller pin; 10. Bushing; 101. Sealing ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] The following is combined Figures 1-4 The present invention describes a potentiometer-type multi-position switch, which includes an adjustment mechanism 1, a moving contact 2, a resistive element 3, and a PCBA board 5.

[0025] The moving contact 2 is connected to the adjusting mechanism 1. Multiple grooves 4 are formed on the side of the resistor 3 facing the moving contact 2. The moving contact 2 rotates with the adjusting mechanism 1 and is engaged within the grooves 4. The PCBA board 5 is connected to the resistor 3, and a first pin 51, a second pin 52, and a third pin 53 are provided on the side of the PCBA board 5 away from the resistor 3. The resistance between the first pin 51 and the second pin 52 is the total resistance of the resistor 3. The third pin 53 is located between the first pin 51 and the second pin 52 and is connected to the moving contact 2. The potentiometer-type multi-position switch provided by this invention utilizes linear resistance changes to output different voltage values. It has strong anti-magnetic interference performance, improves detection accuracy, and can effectively resist the influence of external magnetic fields on the conductivity of the resistor 3 and the contact stability of the moving contact 2 in environments prone to magnetic interference, such as industrial environments with dense motors and automotive cabins with complex electromagnetic radiation, thus avoiding voltage signal disturbances or misjudgments of the position caused by interference.

[0026] In some feasible embodiments of this utility model, there are two moving contacts 2 and two third pins 53, and the moving contacts 2 and the third pins 53 are connected in a one-to-one correspondence. Using two moving contacts 2 provides smooth rotation, good feel, and clear gear position. When one set of contacts experiences a brief contact abnormality, the other set can immediately ensure the continuity of the circuit path, avoid interruption of gear position signal transmission, and significantly improve the stability and reliability of the switch in long-term use. On the other hand, dual-channel signal transmission can achieve error compensation through mutual verification of the two voltage signals. In complex electromagnetic environments, even if one signal is slightly affected by a slight magnetic field interference and produces a small deviation, the other stable signal can be used as a reference for correction, further enhancing the anti-interference performance of the switch.

[0027] In some feasible embodiments of this utility model, the adjustment mechanism 1 includes a knob 11, a rotating shaft 12, and a rotating disk 13. The rotating shaft 12 is connected to the bottom end of the knob 11. The knob 11 provides a convenient grip and operating platform. The shape of the knob 11 can be designed to conform to the ergonomic structure according to the usage scenario, improving the comfort and control during manual adjustment, and facilitating users to quickly and accurately complete gear switching. The rotating shaft 12 can stably transmit the rotation action of the knob 11 to the rotating disk 13, reducing shaking or deviation during operation, ensuring the linearity and continuity of power transmission, and avoiding misalignment between the moving contact 2 and the groove 4 due to unstable transmission. The rotating disk 13 is connected to the bottom end of the rotating shaft 12, and the moving contact 2 is connected to the bottom of the rotating disk 13. The rotating disk 13 increases the connection area with the moving contact 2, effectively preventing the moving contact 2 from loosening or falling off due to vibration and friction during long-term rotation adjustment, ensuring the reliability of contact.

[0028] In some feasible embodiments of this utility model, the adjusting mechanism 1 further includes an elastic element 14, one end of which is connected to the bottom of the rotating disk 13, and the other end of which is connected to the moving contact 2. The elastic element 14 can provide continuous and stable pressure to the moving contact 2, ensuring that the moving contact 2 is always tightly fitted with the inner wall of the groove 4 of the resistor 3, effectively avoiding poor contact caused by assembly gaps, loosening of components after long-term use, or vibration, and ensuring the continuity and stability of voltage signal transmission. The buffering characteristics of the elastic element 14 can significantly reduce the rigid collision when the moving contact 2 and the groove 4 are engaged, reduce frictional loss between them, slow down the wear rate of the moving contact 2 and the resistor 3, and greatly extend the service life of the switch, especially suitable for scenarios where the gear is frequently adjusted.

[0029] In some feasible embodiments of this utility model, the elastic element 14 is a spring. As an elastic element, the spring has a stable and lasting elastic force, which can provide uniform and adjustable pressure to the ball, ensuring that the ball always maintains close contact with the groove 4 of the resistor 3. The moving contact 2 is a ball with a spherical structure. The contact with the groove 4 of the resistor 3 is a point contact, with a small and concentrated contact area, which can reduce the contact resistance during current transmission and improve conductivity.

[0030] In some feasible embodiments of this utility model, it further includes an upper cover 6, a middle cover 7, and a lower cover 8. The upper cover 6 has an opening at the bottom and a first inner cavity; a through hole for the rotating shaft 12 to pass through is provided in the middle of the upper cover 6, and the rotating disk 13 is located in the first inner cavity. The upper cover 6 provides a closed protective space, which can effectively block external dust from the rotating shaft 12 and the rotating disk 13, and avoid impurities adhering to the surface of the rotating parts, causing jamming or wear. The middle cover 7 is integrally set with the resistor 3. The middle cover 7 is set at the bottom of the upper cover 6, which isolates the contact area between the resistor 3 and the moving contact 2 from the external environment, and avoids the stability of the resistance change caused by external interference. The lower cover 8 has an opening at the top and a second inner cavity. The PCBA board 5 is located inside the lower cover 8. The second inner cavity provides an independent protective space for the PCBA board, which can buffer the impact of external mechanical shock on the PCBA board. The first pin 51, the second pin 52, and the third pin 53 pass through the lower cover 8 and extend beyond it. This not only ensures convenient connection with external circuits, but also reduces the risk of pin deformation due to force during insertion, removal, or pulling by the fixing effect of the lower cover 8, thereby improving the reliability of the electrical connection.

[0031] In some feasible embodiments of this utility model, the outer peripheries of the upper cover 6, the middle cover 7, and the lower cover 8 are flush and all cylindrical. The cylindrical structure possesses excellent symmetry and mechanical stability, distributing external impact forces evenly across the entire cover surface, reducing deformation or damage caused by localized stress concentration. Especially when subjected to external forces such as vibration and collision, it effectively protects core components such as the internal adjustment mechanism 1, resistor 3, and PCBA board 5, improving the overall impact resistance of the switch. The cylindrical shape and flush periphery facilitate standardized installation of the switch in various devices—whether embedded in the circular mounting holes of the control panel or arranged alongside other cylindrical components, it reduces space occupation and improves the compactness and rationality of the internal structure of the device.

[0032] In some feasible embodiments of this utility model, a needle roller pin 9 is also included, which is disposed on the upper cover 6 and corresponds to the initial position of the potentiometer-type multi-position switch. The needle roller pin 9 provides a precise physical positioning reference for the initial position of the switch. When the adjustment mechanism 1 rotates to the initial position, the needle roller pin 9 can form a clear mechanical limit or engagement with the rotating disk 13 or related components, ensuring that the switch can accurately return to the preset initial state every time the device is started or reset, avoiding errors in the initial parameters of the device due to position offset. This is especially suitable for instruments, home appliances, and other scenarios that require fixed initial settings.

[0033] In some feasible embodiments of this utility model, a hollow screw 61 extends from the side of the upper cover 6 away from the middle cover 7. A rotating shaft 12 is rotatably mounted on the inner side of the hollow screw 61. The hollow screw 61 provides additional axial support and radial limiting for the rotating shaft 12. The cooperation between its inner wall and the rotating shaft 12 can further constrain the wobbling amplitude of the rotating shaft, ensuring that the adjusting mechanism 1 always maintains coaxiality during rotation, avoiding misalignment between the moving contact 2 and the groove 4 caused by rotational offset, and significantly improving the accuracy and smoothness of gear adjustment. A nut 62 is sleeved on the outer periphery of the hollow screw 61, allowing the switch to be quickly and securely installed on the control panel or mounting bracket of various devices via threaded connection.

[0034] In some feasible embodiments of this utility model, a bushing 10 and a sealing ring 101 are provided between the hollow screw 61 and the rotating shaft 12. The bushing 10, as an intermediate connecting part between the rotating shaft 12 and the hollow screw 61, can be made of a material with a high wear resistance coefficient (such as engineering plastics or metal alloys), effectively isolating the two from direct contact. This transforms the metal-to-metal friction during rotation into a low-friction fit between the bushing and the rotating shaft, and between the bushing and the hollow screw, significantly reducing the wear rate, minimizing jamming or abnormal noise during rotation, and significantly improving the smoothness and stability of the adjusting mechanism's rotation. The sealing ring 101 forms a tight sealing barrier on the outside of the bushing, closely fitting the inner wall of the hollow screw and the surface of the rotating shaft. This effectively prevents external dust, moisture, oil, and other impurities from entering the switch through the gap between them, avoiding problems such as poor contact and abnormal resistance caused by impurities adhering to the surface of the elastic element, moving contact 2, or resistive element 3, thus enhancing the switch's protective capability in complex environments such as humid and dusty conditions.

[0035] In summary, the potentiometer-type multi-position switch provided by this utility model embodiment can output different voltage values ​​by utilizing the linear change of the potentiometer's resistance, has strong anti-magnetic interference performance, and improves the accuracy of detection.

[0036] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A potentiometer-type multi-position switch, characterized in that, include: Adjustment mechanism (1); The moving contact (2) is connected to the adjustment mechanism (1); The resistor (3) has multiple grooves (4) on one side facing the moving contact (2). The moving contact (2) rotates with the adjustment mechanism (1) and is locked in the grooves (4). PCBA board (5) is connected to the resistor (3), and a first pin (51), a second pin (52) and a third pin (53) are provided on the side of the PCBA board (5) away from the resistor (3). The resistance between the first pin (51) and the second pin (52) is the total resistance of the resistor (3). The third pin (53) is located between the first pin (51) and the second pin (52), and the third pin (53) is connected to the moving contact (2).

2. The potentiometer-type multi-position switch according to claim 1, characterized in that, There are two moving contacts (2) and two third pins (53), and the moving contacts (2) and the third pins (53) are connected in a one-to-one correspondence.

3. The potentiometer-type multi-position switch according to claim 1, characterized in that, The adjustment mechanism (1) includes: Knob (11); A rotating shaft (12) is connected to the bottom end of the knob (11); A rotating disk (13) is connected to the bottom end of the rotating shaft (12), and the bottom of the rotating disk (13) is connected to the moving contact (2).

4. The potentiometer-type multi-position switch according to claim 3, characterized in that, The adjustment mechanism (1) further includes: An elastic element (14) is provided, one end of which is connected to the bottom of the rotating disk (13), and the other end of which is connected to the moving contact (2).

5. The potentiometer-type multi-position switch according to claim 4, characterized in that, The elastic element (14) is a spring, and the moving contact (2) is a ball.

6. The potentiometer-type multi-position switch according to any one of claims 3-5, characterized in that, Also includes: The top cover (6) has an opening at the bottom and a first inner cavity; the top cover (6) has a through hole in the middle for the rotating shaft (12) to pass through, and the rotating disk (13) is located in the first inner cavity; The middle cover (7) is integrally formed with the resistor (3) and is located at the bottom of the upper cover (6); The lower cover (8) has an opening at the top and a second inner cavity. The PCBA board (5) is located inside the lower cover (8), and the first pin (51), the second pin (52) and the third pin (53) pass through the lower cover (8) and extend outside the lower cover (8).

7. The potentiometer-type multi-position switch according to claim 6, characterized in that, The outer peripheries of the upper cover (6), the middle cover (7) and the lower cover (8) are flush and all are cylindrical.

8. The potentiometer-type multi-position switch according to claim 6, characterized in that, Also includes: A needle roller pin (9) is disposed on the upper cover (6), and the needle roller pin (9) corresponds to the initial position of the potentiometer-type multi-position switch.

9. The potentiometer-type multi-position switch according to claim 6, characterized in that, A hollow screw (61) extends from the side of the upper cover (6) away from the middle cover (7). The rotating shaft (12) is rotatably provided on the inner side of the hollow screw (61), and a nut (62) is sleeved on the outer periphery of the hollow screw (61).

10. The potentiometer-type multi-position switch according to claim 9, characterized in that, A bushing (10) and a sealing ring (101) are provided between the hollow screw (61) and the rotating shaft (12).

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