Adjustable potentiometer

Abstract

The invention provides an adjustable potentiometer, which belongs to the field of electronic components and specifically comprises a bearing disc and a resistor body, and the resistor body is arranged on the bearing disc and extends in an arc shape; the end position pins are connected to the two ends of the resistor body; the sliding contact arm is located above the resistor body and can do circular motion, the contact piece is connected to the sliding contact arm and abuts against the resistor body all the time, and if the sliding contact arm does circular motion, the contact piece moves on the resistor body; the adjusting mechanism is connected with the sliding contact arm and is used for enabling the sliding contact arm to do circular motion; compared with the prior art, the contact piece always abuts against the resistor body, even if the resistor body or the contact piece is abraded after the contact piece slides on the resistor body for a long time, the contact piece still abuts against the resistor body, and the condition of poor contact of the resistor body can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic components, and particularly relates to an adjustable potentiometer. Background Art

[0002] A potentiometer is an electronic component with adjustable resistance value. It is widely used in scenarios such as voltage regulation, signal control and sensor calibration in circuits. Traditional potentiometers are usually composed of a resistor body, a sliding contact and a shell. Its working principle is to change the resistance value of the connected circuit through a sliding contact, thereby achieving voltage division or resistance changing function.

[0003] However, due to the influence of internal structure design, most existing potentiometers are difficult to achieve precise fine-tuning. At the same time, during long-term use, they are easily affected by external environmental factors (such as vibration, temperature changes, etc.), resulting in poor contact, which in turn affects normal operation. Summary of the Invention

[0004] The object of the present invention is to provide an adjustable potentiometer that can accurately adjust the resistance value and has a stable connection, thereby reducing the occurrence of poor contact.

[0005] To achieve the above object, the present invention adopts a technical solution that is an adjustable potentiometer, comprising a carrier plate and a resistor body, wherein the resistor body is disposed on the carrier plate and extends in an arc shape; terminal pins are connected to both ends of the resistor body; a sliding contact arm is located above the resistor body and is capable of circular motion; The contact piece is connected to the sliding contact arm and always contacts the resistor body. If the sliding contact arm performs a circular motion, the contact piece moves on the resistor body. The adjustment mechanism is connected to the sliding contact arm and is used to make the sliding contact arm perform a circular motion.

[0006] Furthermore, the contact element includes a contact rod and an elastic component. The contact rod passes through the sliding contact arm and can move axially. The elastic component is fixed on the contact rod and its end portion abuts against the sliding contact arm.

[0007] Furthermore, it also includes a locking component, which is arranged at the end of the resistor body and is used to lock the end pin.

[0008] Furthermore, the resistor body includes a main body portion and an end extension portion, and the main body portion is an arc-shaped extension; The end extension portion is butted against the end of the main body portion, so that the locking assembly is arranged on the end extension portion.

[0009] Furthermore, the end of the resistor body is butted against a stop component, so that when the sliding contact arm performs a circular motion, it can drive the contact piece to move onto the stop component.

[0010] Furthermore, the locking assembly includes a short sleeve and a regulating disk, and the short sleeve is arranged on the carrying disk; The regulating disk is connected to the lower end of the short sleeve and can rotate; the locking rod passes through the bearing disk and the short sleeve and is screwed to the regulating disk, so that the regulating disk can drive the locking rod to move axially when it rotates.

[0011] Furthermore, the carrier plate is connected to a transmission ring, which is connected to the adjustment mechanism and the control plate. The adjustment mechanism can rotate the transmission ring, thereby driving the control plate to rotate.

[0012] Furthermore, the adjustment mechanism includes a transmission rod and a drive assembly. The transmission rod passes through the carrier plate to connect the sliding contact arm to the transmission rod, and the transmission rod can drive the sliding contact arm to move; the drive assembly is connected to the transmission rod to rotate the transmission rod.

[0013] Furthermore, the transmission rod includes an upper rod body and a lower rod body, the upper rod body is connected to the driving assembly; the lower rod body is connected to the upper rod body and can move vertically, and the lower rod body can rotate synchronously with the upper rod body.

[0014] Furthermore, the lower rod body is connected to a guide plate, which is provided with a guide track groove. The lower rod body is provided with a guide arm, which is located in the guide track groove. The guide track groove enables the lower rod body to move axially during rotation.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the contact piece in the present technical solution always contacts the resistor body. Even if the contact piece slides on the resistor body for a long time and causes wear of the resistor body or the contact piece, the contact piece still contacts the resistor body, thereby avoiding poor contact of the resistor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection between the adjustment mechanism and the carrier plate of the present invention; Figure 3 This is a schematic diagram of the connection between the contact piece and the sliding contact arm of the present invention; Figure 4 This is a schematic diagram of the connection between the transmission rod and the drive assembly of the present invention; Figure 5 This is a schematic diagram of the connection between the resistor and the shifting component of the present invention; Figure 6 This is a schematic structural diagram of the locking assembly in the present invention; Figure 7 This is a schematic diagram of the connection between the transmission ring and the carrier plate of the present invention; Figure 8 It is a schematic diagram of the transmission rod structure of the present invention; Figure 9 It is a schematic structural diagram of the guide disk of the present invention; Figure 10Schematic diagram of the cross-sectional structure of the guide disk of the present invention; Figure 11 It is a schematic diagram of the sliding contact arm structure of the present invention.

[0017] Among them, 1-outer shell, 2-carrying plate, 3-resistor, 301-main body, 302-end extension, 4-end pin, 5-middle pin, 6-middle guide, 701-transmission rod, 7011-upper rod, 7012-lower rod, 7013-guide arm, 7014-steering groove, 801-sliding contact arm, 802-touch rod, 803-elastic component, 804-blocking piece, 805-connecting port, 806-guide rod, 901-first shaft, 90 2-first gear, 903-second gear, 1001-short sleeve, 1002-control plate, 10031-straight rod, 10032-end pressure plate, 1101-transmission ring, 1102-linear groove, 1201-extension plate, 1202-extension groove, 1203-vertical block rod, 1204-pressure rod, 1301-guide plate, 1302-guide sleeve, 1303-guide track groove, 13031-horizontal track segment, 13032-spiral track segment. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] See Figures 1 to 2As shown, an adjustable potentiometer includes an outer shell 1 with a built-in cavity, a carrying disc 2 is provided in the built-in cavity, the carrying disc 2 is fixedly connected to the outer shell 1, a resistor 3 is provided on the carrying disc 2, the resistor 3 is extended in a circular arc shape, end pins 4 are provided on the carrying disc 2, there are two end pins 4 and they are respectively connected to one end of the resistor 3, an intermediate guide 6 is also provided on the carrying disc 2, the intermediate guide 6 is connected to the intermediate pin 5, a central opening is provided on the top surface of the outer shell 1, an adjustment mechanism is connected to the carrying disc 2, the outer end of the adjustment mechanism is located on the outside of the outer shell 1, and the resistance value can be adjusted by the adjustment mechanism.

[0021] See Figure 2 and Figure 4 As shown, the adjustment mechanism includes a transmission rod 701, which passes through the carrier plate 2 and the central opening. A locking assembly is provided on the transmission rod 701, which is connected to the outer shell 1. The locking assembly includes two locking discs, which are respectively located above and inside the outer shell 1. The locking assembly is used to keep the transmission rod 701 in this position so that it will not move axially. At the same time, a sliding contact arm 801 is fixed on the transmission rod 701, and the sliding contact arm 801 is located inside the outer shell 1. The intermediate guide body 6 and the resistor body 3 both have There is a working surface, and two contact pieces are provided on the sliding contact arm 801. The two contact pieces are in contact with the working surfaces of the resistor body 3 and the intermediate guide body 6 respectively. When the transmission rod 701 rotates, the sliding contact arm 801 can be moved. At this time, the contact pieces located at both ends of the sliding contact arm 801 make circular motions, one of which moves along the length direction of the resistor body 3, and the other moves along the length direction of the intermediate guide body 6. The sliding contact arm 801 and the contact pieces have conductive properties. In this way, by moving the sliding contact arm 801 around the transmission rod 701, the resistance value can be changed.

[0022] The intermediate guide body 6 is arc-shaped, and the arc center of the intermediate guide body 6 coincides with the arc center of the resistor body 3. Since the resistor body 3 is arc-shaped, the area enclosed by the resistor body 3 has an opening, and the area enclosed by the intermediate guide body 6 also has an opening, but the two openings are in opposite directions. At this time, the connection position between the sliding contact arm 801 and the transmission rod 701 is located between the two contact pieces, and the arc centers of the resistor body 3 and the intermediate guide body 6 are both located on the extension line of the transmission rod 701.

[0023] See Figure 3 As shown, the contact member includes a contact rod 802, which passes through a sliding contact arm 801. An elastic component 803 is fixed to the contact rod 802. When the sliding contact arm 801 is in a horizontal state, the contact rod 802 is in a vertical state. At this time, the elastic component 803 exerts a downward movement on the contact rod 802, so that the lower end of the contact rod 802 rests on the working surface.

[0024] The sliding contact arm 801 is provided with a through-hole for passing the contact rod 802, and the through-hole is a circular hole. Two pits are provided on the lower surface of the sliding contact arm 801, and the through-hole is located between the two pits. The elastic component 803 is a metal sheet with elasticity and conductivity, which is fixedly connected to the contact rod 802, and the end of the elastic component 803 is located in the pit on the corresponding side. The elastic component 803 is in a "V" shape. In order to increase the stability of the connection between the elastic component 803 and the sliding contact arm 801, two blocking bars 804 can be provided on the lower surface of the sliding contact arm 801. The two blocking bars 804 are arranged parallel to each other, and the elastic component 803 is located between the two blocking bars 804. At this time, the contact rod 802 cannot rotate, and thus the elastic component 803 cannot rotate. When the contact rod 802 moves in an arc trajectory, the elastic component 803 can be prevented from separating from the sliding contact arm 801. The stability of the elastic component 803 can also be increased by improving the contact rod 802. For example, the cross section of the contact rod 802 can be set to a square. In this case, the through hole of the sliding contact arm 801 is a square hole, and the contact rod 802 cannot rotate, and thus the elastic component 803 cannot rotate either.

[0025] See Figure 1 Figure 4 As shown, a driving assembly is provided on the above-mentioned outer shell 1 or the carrier plate 2, and the driving assembly includes a gear set. At this time, a mating gear 702 is fixed on the transmission rod 701, and the gear plate with the largest diameter in the gear set is engaged with the mating gear 702. Then a first shaft rod 901 is provided on the outer shell 1, and the upper end of the first shaft rod 901 can be connected to an adjusting knob. A first gear 902 is fixed on the first shaft rod 901, and the first gear 902 is engaged with the gear plate with the smallest diameter in the gear set. The transmission rod 701 can be rotated by controlling the rotation of the adjusting knob. At this time, the control of the rotation angle of the transmission rod 701 is more precise.

[0026] When controlling the transmission rod 701 to rotate, it can also be controlled electrically, for example: a micro motor is provided on the outer shell 1, and a second gear 903 is fixed on the output shaft of the micro motor, and the second gear 903 is located in the built-in cavity. The second gear 903 is also engaged with the smallest gear plate in the gear set. In this way, there are two driving modes in the present technical solution, both of which can rotate the transmission rod 701. If only one driving mode is retained, the micro motor and the adjustment knob can be replaced, that is, the output shaft of the micro motor can also be directly connected to the first shaft 901. Whether to choose a micro motor or an adjustment knob can be determined according to the actual application.

[0027] A shifting component is provided on the carrier plate 2 and is located at the end of the resistor body 3. When adjusting the resistance value, the sliding contact arm 801 moves around the transmission rod 701, and the contact rod 802 also moves accordingly. When the contact rod 802 contacts the shifting component, the sliding contact arm 801 cannot move further, thereby limiting the movement range of the sliding contact arm 801 and preventing the sliding contact arm 801 from separating from the resistor body 3 due to excessive movement.

[0028] See Figure 2 、 Figures 5 to 7 As shown, the resistor body 3 includes an arc-shaped main body 301 and an end extension 302. The end extension 302 is connected to the main body 301 near both ends. The two can be integrally formed or detachably connected. The stopper component is butted against the end of the main body 301. The end extension 302 and the main body 301 are made of the same material, while the stopper component is made of an insulating material. When the contact rod 802 moves to the stopper component, a circuit is formed. At this time, the end pin 4 can be removed and the position of the end pin 4 can be swapped. When the end pin 4 is connected to the resistor body 3, a locking component is connected to the end extension portion 302. Specifically, a hole is provided on the end extension portion 302, and a through-hole is provided on the carrier disk 2. The through-hole is coaxially arranged with the hole on the end extension portion 302. The locking component includes a short sleeve 1001 provided on the carrier disk 2. The short sleeve 1001 is a cylindrical structure. The short sleeve 1001 is coaxially arranged with the hole on the end extension portion 302. A regulating disk 1002 is connected to the lower end of the short sleeve 1001. The disk 1002 is rotatable, and a threaded hole is provided at the center of the regulating disk 1002. A locking rod passes through the hole on the end extension 302. The locking rod also passes through the threaded hole of the regulating disk 1002, and the locking rod is screwed to the threaded hole. The regulating disk 1002 is movably connected to the short sleeve 1001, so that the regulating disk 1002 can rotate. In this way, when the regulating disk 1002 rotates, the locking rod can move axially. When the locking rod moves axially to a certain distance, the end pin 4 can be locked by the locking rod. The above-mentioned locking rod includes a straight rod body 10031 and an end pressure plate 10032, the end pressure plate 10032 is fixed to the upper end of the straight rod body 10031, and the lower half of the straight rod body 10031 is provided with an external thread, that is, the lower half of the straight rod body 10031 is screwed with the regulating disk 1002, and in the process of rotating the regulating disk 1002, the straight rod body 10031 can be moved axially, thereby moving the end pressure plate 10032. In the initial state, the end of the end pin 4 is located between the end pressure plate 10032 and the end extension 302. At this time, the end extension 302 and the end pressure plate 10032 cooperate to clamp the end pin 4; and in the control The regulating disk 1002 is rotated to move the end pressure plate 10032 away from the end extension portion 302. At this time, the end pin 4 can be pulled out, so that the end pin 4 can be easily replaced. When the end pin 4 needs to be connected to the resistor body 3, it is only necessary to insert the end pin 4 through the channel at the corresponding position on the outer shell 1 so that the inner end of the end pin 4 rests on the straight rod body 10031, and then control the rotation of the regulating disk 1002. The rotation direction of the regulating disk 1002 changes, so that the end pressure plate 10032 approaches the end extension portion 302 until the two clamp the inner end of the end pin 4, thereby completing the adjustment of the position of the end pin 4.

[0029] When the control disk 1002 is controlled to rotate, the transmission rod 701 needs to be rotated, that is, the movement of the locking rod is controlled by the rotation of the transmission rod 701. Specifically, a slide is provided on the lower surface of the carrying disk 2. The slide is a closed circular ring, and the cross-section of the slide is a convex shape. The carrying disk 2 is connected to the transmission ring 1101 through the slide. The transmission ring 1101 is connected to the control disk 1002. When the transmission ring 1101 rotates, the control disk 1002 can be driven to rotate. For example, convex teeth are provided on the circumferential surface of the control disk 1002, and grooves are provided on the circumferential surface of the transmission ring 1101. The convex teeth on the control disk 1002 cooperate with the grooves on the transmission ring 1101. At this time, the transmission ring 1101 and the control disk 1002 form a meshing connection, and when the transmission ring 1101 rotates, the control disk 1002 can be rotated; The transmission ring 1101 is connected to a number of slides, which are installed on the upper surface of the transmission ring 1101. The slide includes a suspension rod fixed on the upper surface of the transmission ring 1101. A suspension plate is fixed on the upper end of the suspension rod. The suspension plate is located in the slide. When the transmission ring 1101 rotates, the suspension plate makes a circular motion in the slide. There are at least three slides, which are arranged in an array around the center of the transmission ring 1101. In this way, the transmission ring 1101 forms a movable connection with the carrier plate 2. The transmission ring 1101 can rotate after being controlled. Since the above-mentioned slide is an existing product, its structure will not be described in more detail.

[0030] See Figure 7 、 Figure 8 As shown, a linear groove 1102 is provided on the lower surface of the transmission ring 1101. The linear groove 1102 extends in an arc shape. The length of the linear groove 1102 is not less than the length of the resistor 3. A tray 1103 is fixed to the lower end of the transmission rod 701. A lever 1104 is fixed to the tray 1103. The upper end of the lever 1104 is located in the linear groove 1102. When the transmission rod 701 rotates until the contact piece on the sliding contact arm 801 enters the gear component, the lever 1104 is located at the end of the linear groove 1102. If the transmission rod 701 continues to rotate at this time, a thrust will be applied to the transmission ring 1101 through the lever 1104, thereby rotating the transmission ring 1101 and driving the rotation of the control disk 1002. See Figure 2 and Figure 5 As shown, the shifting component includes an extension plate 1201, which extends along the arc direction of the main body 301 of the resistor 3. An extension groove 1202 is provided on the extension plate 1201. When the lower end of the contact member is separated from the main body 301 of the resistor 3, the contact member enters the extension groove 1202 on the extension plate 1201. A vertical stopper 1203 is provided on the extension plate 1201. A pressure rod 1204 is fixed to the upper end of the vertical stopper 1203. The pressure rod 1204 is arc-shaped and is located above the extension plate 1201. The pressure rod 1204 is 204 extends toward the main body 301 of the resistor body 3. At this time, a vertical spacing area is formed between the pressure rod 1204 and the extension plate 1201. The sliding contact arm 801 can enter the vertical spacing area. When the sliding contact arm 801 contacts the vertical blocking rod 1203, the sliding contact arm 801 cannot move further. At this time, the pressure rod 1204 is located above the sliding contact arm 801. However, since the transmission rod 701 needs to continue to rotate, the sliding contact arm 801 cannot move accordingly. Therefore, the connection structure between the transmission rod 701 and the sliding contact arm 801 is as follows: See Figure 2 、 Figures 8 to 11As shown, the transmission rod 701 includes an upper rod body 7011 and a lower rod body 7012, the upper rod body 7011 passes through the central opening on the outer shell 1, and the lower rod body 7012 passes through the carrier plate 2 and the sliding contact arm 801. The lower rod body 7012 and the upper rod body 7011 are both cylindrical rods, and a connecting port 805 is provided on the sliding contact arm 801. The lower rod body 7012 can pass through the connecting port 805. After the upper rod body 7011 and the lower rod body 7012 are connected, a telescopic structure is formed. For example, a jack is provided on the upper rod body 7011, and the jack is connected to the upper rod body 7011. The lower end of 011 extends upward, and the upper end of the lower rod body 7012 is inserted into the socket of the upper rod body 7011. A linear groove 1102 is provided on the inner wall of the socket. A protrusion is fixed on the upper end of the lower rod body 7012. The protrusion is located in the linear groove 1102, so that the upper rod body 7011 and the lower rod body 7012 can be connected, but the two cannot be separated. A compression return spring is also provided in the socket. The compression return spring is located between the upper rod body 7011 and the lower rod body 7012. When the lower rod body 7012 is not subjected to an external force, the compression return spring causes the transmission rod 701 Maintaining the longest state, at this time, there is a certain vertical distance between the tray 1103 and the transmission rod 701, and a guide arm 7013 is fixed on the lower rod body 7012, and the guide arm 7013 extends horizontally. At the same time, a guide plate 1301 is provided in the outer shell 1, and a center opening is provided on the guide plate 1301. The center opening is a circular opening for passing the guide plate 1301, and a guide sleeve 1302 is docked at the center opening of the guide plate 1301. This guide sleeve 1302 has an inner circumferential surface, and the guide plate 1301 is fixedly connected to the inner wall of the outer shell 1. A guide track groove 1303 is provided on the inner circumferential surface of the guide sleeve 1302. The outer end of the guide arm 7013 is located in the guide track groove 1303. When the transmission rod 701 rotates, it drives the guide arm 7013 to perform a circular motion. At this time, the portion of the guide arm 7013 near the outer end moves in the guide track groove 1303. In this process, the lower rod body 7012 moves upward, that is, the overall length of the transmission rod 701 is shortened, and the tray 1103 is driven to move upward, thereby increasing the tightness of the connection between the tray 1103 and the transmission ring 1101. In order to enable the tray 1103 to move upward, the lever 1104 provided on the tray 1103 also adopts the existing elastic telescopic structure. For example, the lever 1104 includes a reference tube body and an upper insertion rod body. The reference tube body is fixed on the tray 1103, and the lower end of the upper insertion rod body is inserted by the upper end of the reference tube body. A return spring is also provided in the reference tube body. The function of the return spring is to enable the upper insertion rod body to be reset, that is, when the upper insertion rod body is subjected to pressing force, the return spring will form a compressed state. During this process, the upper insertion rod body gradually enters the reference tube body, and then when the upper insertion rod body loses its After the pressing force is removed, the upper insertion rod moves upward under the action of the reset spring, that is, the upper insertion rod can gradually extend from the reference tube body. In this way, when the contact on the sliding contact arm 801 moves on the resistor body 3, the upper end of the upper insertion rod is located in the linear groove 1102 on the transmission ring 1101 and can move in the linear groove 1102. When the tray 1103 moves upward, the upper end of the upper insertion rod is against the bottom surface of the linear groove 1102. As the tray 1103 gradually moves upward, the overall length of the shift rod 1104 is gradually shortened.

[0031] In order to enable the lower rod body 7012 to move vertically without affecting the horizontal movement of the sliding contact arm 801, a steering groove 7014 is provided on the outer wall of the lower rod body 7012. The steering groove 7014 extends spirally and is located in the middle position of the lower rod body 7012. A guide rod 806 is provided at the connection port 805 of the sliding contact arm 801. The guide rod 806 is located in the steering groove 7014 and can move in the steering groove 7014. The above-mentioned guide track groove 1303 It includes a horizontal track segment 13031 and a spiral track segment 13032. The horizontal track segment 13031 extends in an arc shape on the horizontal plane, and the spiral track segment 13032 extends in a longitudinal spiral. The lower end of the spiral track segment 13032 is connected to the end of the horizontal track segment 13031, and the extension direction of the spiral track segment 13032 is the same as that of the steering groove 7014. It should be noted that the connection port 805 on the sliding contact arm 801 has the same diameter as the central port of the guide plate 1301. The guide arm 7013 is connected to the guide plate 1301. The guide rod 806 has the same length, and the steering groove 7014 has the same depth as the guide track groove 1303. When the contact slides on the resistor body 3, the guide arm 7013 moves within the horizontal track segment 13031 of the guide track groove 1303. During this process, the guide rod 806 and the steering groove 7014 do not move relative to each other, and the guide rod 806 is located near the upper end of the steering groove 7014. When the contact moves onto the extension plate 1201, the guide arm 7013 enters from below the spiral track segment 13032. At this time, if the transmission rod 701 continues to rotate, the guide arm 7013 will move within the spiral track segment 13032. At this time, the guide rod 806 can also move within the steering groove 7014, thereby rotating the lower rod body 7012 and causing the lower rod body 7012 to move axially. In this way, even after the contact member on the sliding contact arm 801 moves from the main body 301 of the resistor 3 to the extension plate 1201, the transmission rod 701 can continue to rotate while keeping the sliding contact arm 801 stationary. When the above-mentioned contact piece slides on the resistor body 3, the lever 1104 moves in the linear groove 1102. When the contact piece is located on the extension plate 1201 and the sliding contact arm contacts the vertical blocking rod 1203, the lever 1104 contacts the end of the linear groove 1102, and then when the transmission rod 701 continues to rotate, the transmission ring 1101 rotates, so that the regulating disk 1002 can be rotated. Since the locking rod is screwed to the regulating disk 1002, the locking rod can be moved axially, and the end pressure plate 10032 on the locking rod presses the end pin 4. The transmission rod 701 is controlled to rotate in the opposite direction, so that the regulating disk 1002 can be rotated in the opposite direction, and the end pressure plate 10032 loosens the end pin 4, which is convenient for replacing the connection position of the end pin 4.

[0032] In this technical solution, the resistance value can be accurately adjusted, and the end pin 4 can be conveniently disassembled and installed, which is beneficial to the position adjustment of the end pin 4.

[0033] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An adjustable potentiometer, characterized in that: include: Carrying plate (2); The resistor (3) is arranged on the carrier plate (2) and extends in an arc shape; End pins (4) are connected to both ends of the resistor (3); A sliding contact arm (801) is located above the resistor (3) and is capable of circular motion; A contact piece is connected to the sliding contact arm (801) and is always in contact with the resistor (3). When the sliding contact arm (801) performs a circular motion, the contact piece moves on the resistor (3); The adjustment mechanism is connected to the sliding contact arm (801) and is used to make the sliding contact arm (801) perform circular motion.

2. The adjustable potentiometer according to claim 1, characterized in that: The contact element comprises: A contact rod (802) passes through the sliding contact arm (801) and is capable of axial movement; The elastic component (803) is fixed on the contact rod (802) and its end is against the sliding contact arm (801).

3. The adjustable potentiometer according to claim 1, characterized in that: Also includes: A locking assembly is provided at the end of the resistor body (3) and is used to lock the end pin (4).

4. The adjustable potentiometer according to claim 3, characterized in that: The resistor (3) includes: The main body (301) is extended in an arc shape; The end extension portion (302) is docked at the end of the main body portion (301), so that the locking assembly is arranged on the end extension portion (302).

5. The adjustable potentiometer according to claim 3, characterized in that: The end of the resistor (3) is butted against a stop component, so that when the sliding contact arm (801) performs a circular motion, it can drive the contact piece to move onto the stop component.

6. The adjustable potentiometer according to claim 3, characterized in that: The locking assembly comprises: A short sleeve (1001) is arranged on the carrier plate (2); A control disk (1002) is connected to the lower end of the short sleeve (1001) and is rotatable; The locking rod passes through the carrier disc (2) and the short sleeve (1001) and is screwed to the regulating disc (1002), so that the regulating disc (1002) can drive the locking rod to move axially when it rotates.

7. The adjustable potentiometer according to claim 6, characterized in that: The carrier plate (2) is connected to a transmission ring (1101), which is connected to an adjustment mechanism and a control plate (1002). The adjustment mechanism enables the transmission ring (1101) to rotate, thereby driving the control plate (1002) to rotate.

8. The adjustable potentiometer according to claim 1 or 7, characterized in that: The regulating mechanism comprises: A transmission rod (701), the transmission rod (701) passes through the carrier plate (2), so that the sliding contact arm (801) is connected to the transmission rod (701), and the transmission rod (701) can drive the sliding contact arm (801) to move; A drive assembly is connected to the transmission rod (701) and is used to rotate the transmission rod (701).

9. The adjustable potentiometer according to claim 8, characterized in that: The transmission rod (701) comprises: The upper rod body (7011) is connected to the drive assembly; The lower rod body (7012) is connected to the upper rod body (7011) and can move vertically. The lower rod body (7012) can rotate synchronously with the upper rod body (7011).

10. The adjustable potentiometer according to claim 9, characterized in that: The lower rod body (7012) is connected to a guide disc (1301), a guide sleeve (1302) is provided on the guide disc (1301), a guide track groove (1303) is provided on the guide sleeve (1302), and a guide arm is provided on the lower rod body (7012), and the guide arm is located in the guide track groove (1303). The guide track groove (1303) enables the lower rod body (7012) to move axially during rotation.

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