A device for fine-tuning the electrical parameters of an adjustable resistor circuit board

Abstract

This invention provides a device for fine-tuning the electrical parameters of an adjustable resistor circuit board, relating to the field of electrical performance testing technology. It includes an adjustment frame with a conveying assembly at its top, inside which a board is placed. Three sets of adjustable resistor modules are arranged on the top surface of the board. A power supply connector is fixed to the top of the board. Before actual testing, a corresponding number of adjustment components can be selected based on the number of adjustable resistor modules on the circuit board. Multiple sets of adjustment components are stacked vertically after being inserted into the slots and blocks of a vertical shaft to avoid interference during movement. By rotating the moving frame and releasing the spring clamp, the slider is moved along the inside of the moving frame, moving the vertical rod and hexagonal block to the upper end of the corresponding adjustable resistor module's connector. For different numbers and positions of adjustable resistor modules on the board, corresponding numbers and positions of adjustment components are selected and installed.

Description

Technical Field

[0001] This invention relates to the field of electrical performance testing technology, specifically to a device for fine-tuning the electrical parameters of an adjustable resistive circuit board. Background Technology

[0002] Adjustable resistors, also known as variable resistors, are a type of resistor whose resistance value can be manually adjusted to meet circuit requirements. In electronic circuit design, the accuracy of the resistance value directly affects the stability of signal processing, power management, and sensor calibration. Trimming resistors, as manually adjustable components, change the effective length of the internal conductive material through mechanical rotation, thereby achieving continuous adjustment of the resistance value. Their core applications include circuit debugging, initial calibration, and precision equipment requiring dynamic resistance adjustment. For example, the existing PT10LV10-222A2020-PM-S belongs to the PT-10 series of trimming resistors, uses through-hole mounting, and is suitable for PCB board soldering. The trimming resistor adjusts the resistance value by rotating a shaft to move the contact points of the internal conductive material (such as carbon film or metal film), changing the path length of the current.

[0003] When adjusting the resistance value and circuit board to achieve the performance of group adaptation, it is necessary to connect the adjustable resistor and the circuit board. However, when dealing with multiple adjustable resistors, it is inconvenient and inefficient to adjust them individually. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a device for fine-tuning the electrical parameters of an adjustable resistive circuit board to solve the problems mentioned in the background section. To achieve the above objectives, the present invention provides the following technical solution: a device for fine-tuning the electrical parameters of an adjustable resistor circuit board, comprising: an adjustment frame, a conveying assembly at the top of the adjustment frame, a plate being placed inside the conveying assembly, three sets of adjustable resistor modules being disposed on the top surface of the plate, a power supply plug-in terminal being fixed to the top of the plate, and a test connection terminal being fixed to one side of the plate located at the power supply plug-in terminal; a test device being fixedly installed at the tail end of the adjustment frame of the conveying assembly, an adjustment assembly being disposed at the top of the tail end of the conveying assembly, the adjustment assembly corresponding to the position of the adjustable resistor modules; a driving assembly being disposed at the top of the adjustment frame at the tail end of the conveying assembly, the driving assembly being connected to the plug-in assembly; and a plug-in assembly being disposed at the bottom of the test device, the plug-in assembly corresponding to the power supply plug-in terminal and the test connection terminal; the conveying assembly includes side rails, two sets of which are disposed on both sides of the plate, and the two sides of the plate are... The plate slides along the inside of the side rail. First spring telescopic plates are provided at the bottom of both sides of the plate, and protruding plates are fixed at both ends of the first spring telescopic plates. The protruding plates are in contact with the front and rear ends of the plate. The drive assembly includes a fixed plate, which is fixed to the top of the adjustment frame at the tail end of the side rail. A third spring telescopic plate is provided at the top of the fixed plate, and a drive motor is fixed to the top of the extended end of the third spring telescopic plate. The output end of the drive motor passes through the third spring telescopic plate and is fixed with a connecting shaft. The adjustment assembly includes a moving frame, and a slider is slidably connected inside the moving frame. A vertical rod is slidably inserted inside the slider, and a hexagonal block is fixed to the bottom of the vertical rod. The hexagonal block is snapped into the socket of the adjustable resistor module. The plugging assembly includes a first plugging device, which is located at the top of the test connection end. A second plugging device is located at the top of the power supply plugging end, and the first and second plugging devices are connected to the test device via a connecting line.

[0005] Furthermore, the conveying assembly also includes: a slide rail, a slide block, and a second electric push rod. The slide rail is fixed at the entrance end of the side rail of the adjusting frame. The two sets of side rails slide along the inside of the slide rail. The slide block is slidably installed on the adjusting frame corresponding to the two side rails, and the second electric push rod is fixed inside the slide block. The extended end of the second electric push rod is fixedly connected to the protrusion of the first spring telescopic plate. The first bidirectional electric push rod is fixed at the tail end of the two side rails of the adjusting frame, and the extended end of the first bidirectional electric push rod is fixedly connected to the two side rails. The bottom of the entrance end of the two sets of side rails is provided with a support plate. The two sets of first electric push rods are fixed at the bottom of the adjusting frame corresponding to the support plate, and the extended end of the first electric push rod is fixedly connected to the support plate.

[0006] Furthermore, a horizontal plate is fixed to the top of the convex plate, and a connecting rod is rotatably connected to the outer end of the horizontal plate. A vertical frame is provided on the top of the two sets of side rails, and a sliding sleeve is slidably connected to the two vertical surfaces of the vertical frame. Two connecting rods on the same side of the plate are rotatably connected to the sliding sleeve through a rotating shaft. The top of the vertical frame is fixedly connected to the extended end of the third spring telescopic plate.

[0007] Furthermore, the drive assembly also includes: a third electric push rod, a second spring telescopic plate, and a base. The third electric push rod is fixedly mounted on the surface of the fixed plate, and the extended end of the third electric push rod is fixedly connected to the tail end of the third spring telescopic plate. The second spring telescopic plate is fixedly mounted on the top of the fixed plate, and the base is rotatably mounted on the extended end of the second spring telescopic plate corresponding to the position of the connecting shaft. The retractable end surfaces of the second and third spring telescopic plates have movable notches, and a fourth telescopic plate is slidably connected inside the movable notches. The two ends of the fourth telescopic plate are fixedly connected to the extended ends of the second and third spring telescopic plates.

[0008] Furthermore, the adjustment assembly also includes: a drive wheel, a vertical shaft, a rotating plate, an auxiliary wheel, and a driven wheel. The vertical shaft is rotatably mounted on the moving frame at the position corresponding to the connecting shaft, and the drive wheel is rotatably sleeved on the outer surface of the vertical shaft. The driven wheel is rotatably mounted on the top of the slider. The rotating plates are rotatably mounted on both sides of the moving frame, and the auxiliary wheel is rotatably connected to the outer end of the rotating plate. An annular belt is sleeved on the outer surface of the drive wheel, the auxiliary wheel, and the driven wheel. The top of the vertical shaft and the base is fixed with a plug, and the bottom of the vertical shaft and the connecting shaft is fixed with a slot.

[0009] Furthermore, a second bidirectional electric push rod is fixed to the top surface of the drive wheel, and clamps are fixed to the two extended ends of the second bidirectional electric push rod, which are clamped on the outer surface of the drive wheel; wherein, limit posts are provided on both sides of the drive wheel, auxiliary wheel and driven wheel where the belt passes through.

[0010] Furthermore, a first spring is fixed to the top of the hexagonal block on the outer ring of the vertical rod, and the top of the first spring is fixedly connected to the bottom of the slider. A spring clip is rotatably installed on one side of the slider, and the two sides of the spring clip are clamped on the outer walls of the two sides of the moving frame. A magnet plate is rotatably installed on the hexagonal block at the position corresponding to the outer walls of the two sides of the moving frame through a rotating shaft and a torsion spring.

[0011] Furthermore, the plug-in assembly also includes: a sliding frame, a sliding plate, and a plug plate. The top of the adjustment frame is provided with a sliding frame at the front end of the testing device. Inside the sliding frame, two sets of sliding plates are slidably installed corresponding to the positions of the first plug-in device and the second plug-in device. The plug plate is slidably plugged into the inside of the sliding plate. The first plug-in device and the second plug-in device are rotatably installed at the bottom of the plug plate via a rotating shaft. The adjustment frame has a fourth electric push rod fixed inside at both ends of the sliding frame, and the extended end of the fourth electric push rod is fixedly connected to the sliding frame.

[0012] Furthermore, a first locking bolt is threaded onto the outer side of the rotating connecting shaft of the first and second plug-in devices corresponding to the plug plate, and the first locking bolt is in extrusive contact with the rotating shaft of the first and second plug-in devices.

[0013] Furthermore, a third locking bolt is threaded onto the surface of the slide corresponding to the protruding end of the insert plate, and the third locking bolt is in contact with the side of the insert plate. A second locking bolt is threaded onto the back of the slide, and the second locking bolt is in contact with the slide frame.

[0014] The beneficial effects of this invention are: 1. In this invention, a first electric push rod pushes the plate between two side rails, and a first bidirectional electric push rod drives the two side rails to slide along the slide rails. The two sides of the plate are inserted into the side rails, and the front and rear ends are clamped and limited by a first spring telescopic plate and a convex plate. A second electric push rod of the same specification drives the first spring telescopic plate to move the plate to the end of the side rail, which facilitates resistance adjustment and connection between the plate and the testing device. The length of the first spring telescopic plate is adjusted according to the size of the plate. The two connecting rods synchronously adjust the position of the vertical frame. The sliding sleeve slides along the vertical surface of the vertical frame, and the position of the automatic adjustment drive component is kept in the middle position of the plate, which facilitates subsequent adjustment of the position of the adjustment component.

[0015] 2. According to the number of adjustment components, the third electric push rod drives the third spring telescopic plate to move up and down, adjusting the distance between the connecting shaft and the base. After multiple sets of adjustment components are stacked, the connecting shaft and the base are engaged with the vertical shaft. The drive motor drives the connecting shaft to rotate, which makes the vertical shaft in the adjustment component rotate synchronously. Then, through the transmission of the driving wheel, the auxiliary wheel and the driven wheel, the resistance value of the adjustable resistor module is adjusted synchronously. The fourth telescopic plate slides along the moving notch to keep the second spring telescopic plate and the third spring telescopic plate at the same extension and retraction length.

[0016] 3. In this invention, after the magnet plate is released, the spring-loaded vertical rod of the first spring passes through the driven wheel and the slider, and the hexagonal block is inserted into the socket of the adjustable resistor module. The second bidirectional electric push rod drives the clamping plate to hold the vertical shaft, realizing the locking connection between the driving wheel and the vertical shaft. When the vertical shaft rotates under the drive component, the driving wheel will also rotate synchronously, the slider slides along the inside of the moving frame, and the rotating plate rotates to adjust the position of the two auxiliary wheels, keeping the belt taut between the driving wheel, auxiliary wheel, and driven wheel, and the limit post controls the... The belt exit position limiter ensures sufficient contact surface between the belt and the drive pulley, auxiliary pulley, and driven pulley, thereby maintaining transmission capability. The adjustment component can simultaneously adjust the adjustable resistor module. When a resistor adjustment is completed, the second bidirectional electric push rod releases its clamp on the vertical shaft. At this time, the vertical rod and hexagonal block at that position no longer adjust the adjustable resistor module. A protrusion is fixed on the surface of the vertical rod, and the slider and driven pulley are slidably engaged with the protrusion. Thus, when the vertical rod moves up and down, the transmission connection between the driven pulley and the vertical rod can be maintained.

[0017] 4. Before actual testing, the present invention can select a corresponding number of adjustment components based on the number of adjustable resistor modules on the circuit board. Multiple adjustment components are stacked on top of each other after being plugged into the vertical shaft and slot to avoid interference during movement. By rotating the moving frame and releasing the spring clip, the slider is moved along the inside of the moving frame, and the vertical rod and hexagonal block are moved to the upper end of the corresponding adjustable resistor module's socket. For different numbers and positions of adjustable resistor modules on the board, the corresponding number and position of adjustment components are selected and installed.

[0018] 5. In this invention, after the plate moves to the end of the side rail, two sliding plates move along the sliding frame to adjust the lateral position of the first and second plug-in devices. At the same time, the insert plate passes through the sliding plates to adjust the longitudinal position of the first and second plug-in devices. By rotating the first and second plug-in devices along the bottom of the insert plate, the angle of the first and second plug-in devices can be adjusted. For example, if the circuit plug-in end and the test connection end are located at different positions on both sides of the plate, this structure can be used to adjust them to correspond. Furthermore, the first, second, and third locking bolts lock the position of the sliding plate inside the sliding frame, lock the length of the insert plate extending out of the sliding plate, and lock the angle between the first and second plug-in devices and the insert plate to maintain stability during the plugging process. By driving the sliding frame to rise and fall with the fourth electric push rod, the connection between the first plug-in device and the test connection end and the connection between the second plug-in device and the power supply plug-in end can be realized, facilitating subsequent testing and power supply. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of the present disclosure; Figure 2This is a schematic diagram of the internal structure of the adjustment frame in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 3 This is a schematic diagram of the bottom structure of an adjustable resistor circuit board with fine-tuning of electrical parameters according to an embodiment of this disclosure; Figure 4 This is a schematic diagram of the transmission component structure in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 5 This is a schematic diagram showing the connection between the driving component and the conveying component in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 6 This is a schematic diagram of the drive component structure in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 7 This is a schematic diagram of the adjustment component structure in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 8 This is a schematic diagram of the connection between the active wheel and the auxiliary wheel in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 9 This is a schematic diagram of the connection between the plug rod and the slider in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 10 This is a schematic diagram of the plug-in component structure in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 11 This is a schematic diagram of the connection between the sliding plate and the sliding frame in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; Figure 12 This is a schematic diagram of the connection between the insert plate and the slide plate in an adjustable resistor circuit board electrical parameter fine-tuning device according to an embodiment of this disclosure; As shown in the figure: 1. Adjustment frame; 11. Testing device; 12. First electric push rod; 13. Support plate; 2. Conveying assembly; 21. Slide rail; 22. Side rail; 23. Slide block; 24. Second electric push rod; 25. First spring telescopic plate; 26. Convex plate; 27. Horizontal plate; 28. Connecting rod; 29. ​​Sliding sleeve; 210. Vertical frame; 211. First bidirectional electric push rod; 3. Drive assembly; 31. Fixing plate; 32. Third electric push rod; 33. Second spring telescopic plate; 34. Third spring telescopic plate; 35. Drive motor; 36. Fourth telescopic plate; 37. Moving notch; 38. Connecting shaft; 39. Base; 4. Board body; 41. Adjustable resistor module; 42. Power supply connector; 43. Test connector; 5. Plug-in assembly; 51. Fourth electric push rod; 52. Slide frame; 53. Slide plate; 54. Insert plate; 55. First plug-in device; 56. Second plug-in device; 57. First locking bolt; 58. Second locking bolt; 59. Third locking bolt; 6. Adjustment assembly; 61. Moving frame; 62. Drive wheel; 63. Vertical shaft; 64. Rotating plate; 65. Auxiliary wheel; 66. Driven wheel; 67. Vertical rod; 68. Hexagonal block; 69. First spring; 610. Insert block; 611. Slot; 612. Second bidirectional electric push rod; 613. Clamping plate; 614. Limiting post; 615. Second spring; 616. Slider; 617. Spring clip; 618. Magnetic plate. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown in the figure, this disclosure proposes a device for fine-tuning the electrical parameters of an adjustable resistor circuit board, comprising: an adjustment frame 1, a conveying assembly 2 on the top of the adjustment frame 1, and a plate 4 placed inside the conveying assembly 2. Three sets of adjustable resistor modules 41 are disposed on the top surface of the plate 4. A power supply plug-in terminal 42 is fixed to the top of the plate 4, and a test connection terminal 43 is fixed to one side of the plate 4 near the power supply plug-in terminal 42. A test device 11 is fixedly installed on the adjustment frame 1 at the tail end of the conveying assembly 2. An adjustment assembly 6 is provided at the top of the tail end of the conveying assembly 2, and the adjustment assembly 6 corresponds to the position of the adjustable resistor modules 41. A drive assembly 3 is provided on the top of the adjustment frame 1 at the tail end of the conveying assembly. The test device 11 is connected to the plug-in assembly 5. The bottom of the test device 11 is provided with the plug-in assembly 5, which corresponds to the power supply plug-in terminal 42 and the test connection terminal 43. The conveying assembly 2 includes a side rail 22. There are two sets of side rails 22, which are arranged on both sides of the plate body 4. The two sides of the plate body 4 slide along the inside of the side rails 22. The bottom of both sides of the plate body 4 is provided with a first spring telescopic plate 25, and the two ends of the first spring telescopic plate 25 are fixed with protruding plates 26. The protruding plates 26 are in contact with the front and rear ends of the plate body 4. The driving assembly 3 includes a fixing plate 31. The fixing plate 31 is fixed to the top of the adjusting frame 1 at the tail end of the side rail 22. The top of the fixing plate 31 is provided with a third spring telescopic plate 34. Furthermore, a drive motor 35 is fixed to the top of the extended end of the third spring telescopic plate 34, and the output end of the drive motor 35 passes through the third spring telescopic plate 34 and is fixed to a connecting shaft 38; the adjustment component 6 includes a movable frame 61, a slider 616 is slidably connected inside the movable frame 61, a vertical rod 67 is slidably inserted inside the slider 616, and a hexagonal block 68 is fixed to the bottom of the vertical rod 67, the hexagonal block 68 is snapped into the socket of the adjustable resistor module 41; the plugging component 5 includes a first plugging device 55, the first plugging device 55 is disposed on the top of the test connection end 43, and a second plugging device 56 is disposed on the top of the power supply plugging end 42, and the first plugging device 55 and the second plugging device 56 are connected together. 6. Connect to the testing device 11 via a connecting cable. When using the device, the board 4 is fed into the vicinity of the testing device 11 via the conveying component 2. It is connected to the adjustable resistor module 41 via the adjusting component 6. The board 4 is connected to the testing device 11 via the plug-in component 5. The driving component 3 drives the adjusting component 6 to adjust the resistance value of the adjustable resistor module 41. The signal value of the circuit board is detected by the testing device 11. This device is an electrical performance testing device that adjusts the resistance value. It can perform precise resistance adjustment on special circuit boards for electrical equipment such as intelligent large-scale transformers, DC converter transformers, intelligent reactors, transformers, rectifiers and inductors; intelligent power distribution systems, facilities and other power distribution switch control equipment.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the conveying assembly 2 further includes: a slide rail 21, a slide block 23, and a second electric push rod 24. The slide rail 21 is fixed at the entrance end of the side rail 22 of the adjusting frame 1. The two sets of side rails 22 slide along the inside of the slide rail 21. The slide block 23 is slidably installed on the adjusting frame 1 corresponding to the positions of the two side rails 22, and the second electric push rod 24 is fixed inside the slide block 23. The extended end of the second electric push rod 24 is fixedly connected to the protrusion 26 of the first spring telescopic plate 25. The first bidirectional electric push rod 211 is fixed at the tail end of the two side rails 22 of the adjusting frame 1, and the extended end of the first bidirectional electric push rod 211 is connected to the two side rails 22. Fixed connection; wherein, the bottom of the inlet end of the two sets of side rails 22 is provided with a support plate 13, the adjustment frame 1 is fixed with two sets of first electric push rods 12 corresponding to the bottom of the support plate 13, and the extended end of the first electric push rod 12 is fixedly connected to the support plate 13, the top of the convex plate 26 is fixed with a horizontal plate 27, and the outer end of the horizontal plate 27 is rotatably connected with a connecting rod 28, the top of the two sets of side rails 22 is provided with a vertical frame 210, the two vertical surfaces of the vertical frame 210 are slidably connected with a sliding sleeve 29, and the two connecting rods 28 on the same side of the plate body 4 are rotatably connected to the sliding sleeve 29 through a rotating shaft; wherein, the top of the vertical frame 210 is fixedly connected to the extended end of the third spring telescopic plate 34.

[0023] Understandably, the circuit board is placed on the tray 13 and pushed between the two side rails 22 by the first electric push rod 12. The two side rails 22 slide along the slide rail 21 by the first bidirectional electric push rod 211. The two sides of the board 4 are inserted into the side rails 22, and the front and rear ends are clamped and limited by the first spring telescopic plate 25 and the protruding plate 26. The second electric push rod 24 of the same specification drives the first spring telescopic plate 25 to move the board 4 to the end of the side rail 22, which facilitates resistance adjustment and connection of the board 4 to the test device 11. The length of the first spring telescopic plate 25 is adjusted according to the size of the board 4. The two connecting rods 28 synchronously adjust the position of the vertical frame 210. The sliding sleeve 29 slides along the vertical surface of the vertical frame 210, and the position of the automatic adjustment drive component 3 is kept in the middle position of the board 4, which facilitates subsequent adjustment of the position of the adjustment component 6.

[0024] like Figure 5 and Figure 6As shown, in some embodiments, the drive assembly 3 further includes: a third electric push rod 32, a second spring telescopic plate 33, and a base 39. The third electric push rod 32 is fixed on the surface of the fixed plate 31, and the extended end of the third electric push rod 32 is fixedly connected to the tail end of the third spring telescopic plate 34. The second spring telescopic plate 33 is fixed on the top of the fixed plate 31, and the base 39 is rotatably mounted on the extended end of the second spring telescopic plate 33 corresponding to the position of the connecting shaft 38. The second spring telescopic plate 33 and the retractable end of the second spring telescopic plate 33 are provided with a movable notch 37. A fourth telescopic plate 36 is slidably connected inside the movable notch 37, and both ends of the fourth telescopic plate 36 are fixedly connected to the extended ends of the second spring telescopic plate 33 and the third spring telescopic plate 34.

[0025] Understandably, based on the number of adjustment components 6, the third electric push rod 32 drives the third spring telescopic plate 34 to move up and down, adjusting the distance between the connecting shaft 38 and the base 39. After multiple sets of adjustment components 6 are stacked, the connecting shaft 38 and the base 39 are engaged with the vertical shaft 63. The drive motor 35 drives the connecting shaft 38 to rotate, which allows the vertical shaft 63 inside the adjustment component 6 to rotate synchronously. Then, through the transmission of the drive wheel 62, the auxiliary wheel 65 and the driven wheel 66, the resistance value of the adjustable resistor module 41 is adjusted synchronously. The fourth telescopic plate 36 slides along the moving notch 37 to keep the second spring telescopic plate 33 and the third spring telescopic plate 34 at the same extension and retraction length.

[0026] like Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, in some embodiments, the adjustment assembly 6 further includes: a drive wheel 62, a vertical shaft 63, a rotating plate 64, an auxiliary wheel 65, and a driven wheel 66. The vertical shaft 63 is rotatably mounted on the moving frame 61 corresponding to the position of the connecting shaft 38, and the drive wheel 62 is rotatably sleeved on the outer surface of the vertical shaft 63. The driven wheel 66 is rotatably mounted on the top of the slider 616. The rotating plates 64 are rotatably mounted on both sides of the moving frame 61, and the auxiliary wheel 65 is rotatably connected to the outer end of the rotating plate 64. An annular belt is sleeved on the outer surfaces of the drive wheel 62, the auxiliary wheel 65, and the driven wheel 66. A plug 610 is fixed to the top of the vertical shaft 63 and the base 39, and a slot 611 is fixedly opened at the bottom of the vertical shaft 63 and the connecting shaft 38. The top of the drive wheel 62... A second bidirectional electric push rod 612 is fixed on the surface. The two extended ends of the second bidirectional electric push rod 612 are fixed with clamping plates 613, which clamp the outer surface of the drive wheel 62. The drive wheel 62, the auxiliary wheel 65, and the driven wheel 66 are provided with limit posts 614 on both sides where the belt passes through. The top of the hexagonal block 68 is fixed with a first spring 69 on the outer ring of the vertical rod 67, and the top of the first spring 69 is fixedly connected to the bottom of the slider 616. A spring clip 617 is rotatably installed on one side of the slider 616, and the two sides of the spring clip 617 are clamped on the outer walls of both sides of the moving frame 61. A magnet plate 618 is rotatably installed on the hexagonal block 68 corresponding to the outer walls of both sides of the moving frame 61 via a rotating shaft and a torsion spring.

[0027] It should be noted that before actual testing, the corresponding number of adjustment components 6 can be selected according to the number of adjustable resistor modules 41 on the circuit board. Multiple sets of adjustment components 6 are stacked vertically after being inserted into the vertical shaft 63 via the plug 610 and slot 611 to avoid interference during movement. By rotating the moving frame 61 and releasing the spring clip 617, the slider 616 moves along the inside of the moving frame 61, moving the vertical rod 67 and hexagonal block 68 to the upper end of the corresponding adjustable resistor module 41's socket. For different numbers and positions of adjustable resistor modules 41 on the board 4, the corresponding number and position of adjustment components 6 are selected and installed. After releasing the magnet plate 618, the spring force of the first spring 69 causes the vertical rod 67 to pass through the driven wheel 66 and slider 616, and the hexagonal block 68 is inserted into the socket of the adjustable resistor module 41. The second bidirectional electric push rod 612 drives the clamping plate 613 to clamp onto the vertical shaft 63, achieving a locking connection between the driving wheel 62 and the vertical shaft 63. When the vertical shaft 63 rotates under the drive assembly 3, the drive wheel 62 also rotates synchronously. The slider 616 slides inside the moving frame 61. The rotating plate 64 rotates to adjust the position of the two auxiliary wheels 65, keeping the belt taut between the drive wheel 62, the auxiliary wheel 65 and the driven wheel 66. The belt is limited by the limit post 614 to ensure that the belt has sufficient contact surface with the drive wheel 62, the auxiliary wheel 65 and the driven wheel 66, thereby maintaining the transmission capability. The adjustment assembly 6 can adjust the adjustable resistor module 41 at the same time. When a resistor is adjusted, the second bidirectional electric push rod 612 releases the clamp on the vertical shaft 63. At this time, the vertical rod 67 and the hexagonal block 68 at this position no longer adjust the adjustable resistor module 41. A protrusion is fixed on the surface of the vertical rod 67. The slider 616 and the driven wheel 66 are both slidably engaged on the protrusion. Thus, when the vertical rod 67 moves up and down, the transmission connection between the driven wheel 66 and the vertical rod 67 can be maintained.

[0028] like Figure 10 , Figure 11 and Figure 12As shown, in some embodiments, the plug-in assembly 5 further includes: a sliding frame 52, a sliding plate 53, and a plug plate 54. The top of the adjustment frame 1 is provided with a sliding frame 52 at the front end of the testing device 11. Two sets of sliding plates 53 are slidably installed inside the sliding frame 52 corresponding to the positions of the first plug-in device 55 and the second plug-in device 56. A plug plate 54 is slidably plugged into the inside of the sliding plate 53. The first plug-in device 55 and the second plug-in device 56 are rotatably installed at the bottom of the plug plate 54 via a rotating shaft. A fourth electric push rod 51 is fixed inside the adjustment frame 1 at both ends corresponding to the sliding frame 52. The extended end of rod 51 is fixedly connected to slide frame 52. The insert plate 54 is threaded with a first locking bolt 57 on the outer side of the rotating connecting shaft 38 of the first insert device 55 and the second insert device 56. The first locking bolt 57 is in pressing contact with the rotating shaft of the first insert device 55 and the second insert device 56. The slide plate 53 is threaded with a third locking bolt 59 on the surface of the protruding end of the insert plate 54. The third locking bolt 59 is in pressing contact with the side of the insert plate 54. The back of the slide plate 53 is threaded with a second locking bolt 58. The second locking bolt 58 is in pressing contact with slide frame 52.

[0029] It should be noted that after the board 4 moves to the end of the side rail 22, the two sliding plates 53 are moved along the sliding frame 52 to adjust the lateral position of the first plug-in device 55 and the second plug-in device 56. At the same time, the plug plate 54 is passed through the sliding plates 53 to adjust the longitudinal position of the first plug-in device 55 and the second plug-in device 56. By rotating the first plug-in device 55 and the second plug-in device 56 along the bottom of the plug plate 54, the angle of the first plug-in device 55 and the second plug-in device 56 can be adjusted. For example, if the circuit plug-in end and the test connection end 43 are located at different positions on both sides of the board 4, this structure can be used to adjust the angle. Adjustments are made to ensure alignment, and the position of the slide plate 53 inside the slide frame 52 is locked by the first locking bolt 57, the second locking bolt 58, and the third locking bolt 59. The length of the insert plate 54 extending out of the slide plate 53 is locked, and the angle between the first insertion device 55 and the second insertion device 56 and the insert plate 54 is locked to maintain stability during the insertion process. The slide frame 52 is raised and lowered by the fourth electric push rod 51, which can realize the connection between the first insertion device 55 and the test connection terminal 43 and the second insertion device 56 and the power supply connection terminal 42, facilitating subsequent testing and power supply.

[0030] Working principle: When using the device, the plate 4 is fed into the vicinity of the testing device 11 via the conveying assembly 2. The circuit board is placed on the support plate 13 and pushed between the two side rails 22 by the first electric push rod 12. The two side rails 22 slide along the slide rail 21 by the first bidirectional electric push rod 211. The two sides of the plate 4 are inserted into the side rails 22, and the front and rear ends are clamped and limited by the first spring telescopic plate 25 and the protruding plate 26. The second electric push rod 24 of the same specification drives the first spring telescopic plate 25 to move, moving the plate 4 to the end of the side rail 22, which facilitates resistance adjustment and connection of the plate 4 to the testing device 11. The length of the first spring telescopic plate 25 is adjusted according to the size of the plate 4, and the two connecting rods 28 synchronously adjust the position of the vertical frame 210. The sliding sleeve 29 slides along the vertical surface of the vertical frame 210, automatically adjusting the position of the drive component 3 to remain in the middle of the board 4, facilitating subsequent adjustment of the position of the adjustment component 6. The adjustment component 6 is connected to the adjustable resistor module 41. Before actual testing, the corresponding number of adjustment components 6 can be selected according to the number of adjustable resistor modules 41 on the circuit board. Multiple sets of adjustment components 6 are stacked vertically after being inserted into the plug 610 and slot 611 of the vertical shaft 63 to avoid interference during movement. By rotating the moving frame 61 and releasing the spring clip 617, the slider 616 is moved along the inside of the moving frame 61, moving the vertical rod 67 and hexagonal block 68 to the upper end of the corresponding adjustable resistor module 41's socket. This is suitable for different numbers of adjustable resistors on the board 4. Module 41 and its position: Select and install the corresponding number and position of adjustment components 6. After releasing the magnet plate 618, the spring rod 67 of the first spring 69 passes through the driven wheel 66 and the slider 616. The hexagonal block 68 is inserted into the socket of the adjustable resistor module 41. The second bidirectional electric push rod 612 drives the clamping plate 613 to clamp onto the vertical shaft 63, realizing the locking connection between the driving wheel 62 and the vertical shaft 63. When the vertical shaft 63 is driven to rotate by the drive component 3, the driving wheel 62 will also rotate synchronously. The slider 616 slides along the inside of the moving frame 61. The rotating plate 64 rotates to adjust the position of the two auxiliary wheels 65, keeping the belt taut between the driving wheel 62, the auxiliary wheel 65 and the driven wheel 66, and through the limiting post 61 Four belt extension positions are limited to ensure sufficient contact surface between the belt and the drive pulley 62, auxiliary pulley 65, and driven pulley 66, thereby maintaining transmission capability. Adjustment component 6 can simultaneously adjust the adjustable resistor module 41. When a resistor adjustment is completed, the second bidirectional electric push rod 612 releases its clamp on the vertical shaft 63. At this time, the vertical rod 67 and hexagonal block 68 at that position no longer adjust the adjustable resistor module 41. A protrusion is fixed on the surface of the vertical rod 67, and the slider 616 and driven pulley 66 are slidably engaged with the protrusion. Thus, when the vertical rod 67 moves up and down, the transmission connection between the driven pulley 66 and the vertical rod 67 can be maintained. The plate 4 is connected to the testing device 11 through the plug-in component 5. After the plate 4 moves to the end of the side rail 22,Moving the two slide plates 53 along the slide frame 52 adjusts the lateral position of the first plug-in device 55 and the second plug-in device 56. Simultaneously, the insert plate 54 is passed through the slide plates 53 to adjust the longitudinal position of the first plug-in device 55 and the second plug-in device 56. By rotating the first plug-in device 55 and the second plug-in device 56 along the bottom of the insert plate 54, their angles can be adjusted. For example, if the circuit plug-in end and the test connection end 43 are located at different positions on both sides of the board body 4, this structure can be used to adjust them to correspond. The first locking bolt 57, the second locking bolt 58, and the third locking bolt 59 lock the position of the slide plate 53 inside the slide frame 52, lock the length of the insert plate 54 extending through the slide plate 53, and lock the angle between the first plug-in device 55 and the second plug-in device 56 and the insert plate 54, maintaining stability during the plugging process. The fourth electric push rod 51 drives the slide frame 52 to rise and fall, enabling the first plug-in device 55 to connect with the test connection end 43. The connection of terminal 43 and the connection of the second plug-in device 56 to the power supply plug-in terminal 42 facilitate subsequent testing and power supply. The driving component 3 drives the adjusting component 6 to adjust the resistance value of the adjustable resistor module 41. Based on the number of adjusting components 6, the third electric push rod 32 drives the third spring telescopic plate 34 to move up and down, adjusting the distance between the connecting shaft 38 and the base 39. After multiple sets of adjusting components 6 are stacked, they are engaged with the vertical shaft 63 via the connecting shaft 38 and the base 39. The driving motor 35 drives the connecting shaft 38 to rotate, allowing the vertical shaft 63 within the adjusting component 6 to rotate synchronously. Then, through the transmission of the driving wheel 62, the auxiliary wheel 65, and the driven wheel 66, the resistance value of the adjustable resistor module 41 is adjusted synchronously. The fourth telescopic plate 36 slides along the moving notch 37, keeping the second spring telescopic plate 33 and the third spring telescopic plate 34 at the same extension and retraction length. The signal value of the circuit board is detected by the testing device 11.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This descriptive method is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for fine-tuning the electrical parameters of an adjustable resistive circuit board, characterized in that, include: An adjustment frame (1) is provided with a conveying assembly (2) at the top of the adjustment frame (1), and a plate (4) is placed inside the conveying assembly (2). Three sets of adjustable resistor modules (41) are provided on the top surface of the plate (4). A power supply plug-in terminal (42) is fixed on the top of the plate (4), and a test connection terminal (43) is fixed on one side of the plate (4) located at the power supply plug-in terminal (42). A test device (11) is fixedly installed at the tail end of the adjustment frame (1) located at the tail end of the conveying assembly (2). An adjustment assembly (6) is provided at the top of the tail end of the conveying assembly (2). The adjustment assembly (6) corresponds to the position of the adjustable resistor module (41). A drive assembly (3) is provided at the top of the tail end of the adjustment frame (1). The drive assembly (3) is connected to the plug-in assembly (5) in a transmission manner. A plug-in assembly (5) is provided at the bottom of the test device (11). The plug-in assembly (5) corresponds to the power supply plug-in terminal (42) and the test connection terminal (43). The conveying assembly (2) includes a side rail (22), which is provided in two sets. The two sets of side rails (22) are arranged on both sides of the plate (4), and the two sides of the plate (4) slide along the inside of the side rail (22). The bottom of both sides of the plate (4) is provided with a first spring telescopic plate (25), and the two ends of the first spring telescopic plate (25) are fixed with a protruding plate (26). The protruding plate (26) is in contact with the front and rear ends of the plate (4). The drive assembly (3) includes a fixing plate (31), which is fixed to the top of the adjustment frame (1) at the tail end of the side rail (22). The top of the fixing plate (31) is provided with a third spring telescopic plate (34), and a drive motor (35) is fixed to the top of the extended end of the third spring telescopic plate (34). The output end of the drive motor (35) passes through the third spring telescopic plate (34) and is fixed with a connecting shaft (38). The adjustment component (6) includes a movable frame (61), a slider (616) is slidably connected inside the movable frame (61), a vertical rod (67) is slidably inserted inside the slider (616), and a hexagonal block (68) is fixed at the bottom of the vertical rod (67). The hexagonal block (68) is snapped into the socket of the adjustable resistor module (41). The plug-in assembly (5) includes a first plug-in device (55), which is disposed on the top of the test connection terminal (43). A second plug-in device (56) is disposed on the top of the power supply plug-in terminal (42), and the first plug-in device (55) and the second plug-in device (56) are connected to the test device (11) via a connecting line.

2. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 1, characterized in that, The conveying assembly (2) further includes: The adjustment frame (1) is fixed with a slide rail (21) at the entrance end of the side rail (22). The two sets of side rails (22) slide along the inside of the slide rail (21). The adjustment frame (1) is slidably installed with a slide seat (23) corresponding to the two side rails (22). The slide seat (23) is fixed inside the slide seat (23). The extended end of the second electric push rod (24) is fixedly connected to the protrusion plate (26) of the first spring telescopic plate (25). The adjustment frame (1) is fixed with a first bidirectional electric push rod (211) at the tail end of the two side rails (22). The extended end of the first bidirectional electric push rod (211) is fixedly connected to the two side rails (22). Among them, the bottom of the entrance end of the two sets of side rails (22) is provided with a support plate (13), and the adjustment frame (1) is fixed with two sets of first electric push rods (12) at the bottom of the support plate (13), and the extended end of the first electric push rod (12) is fixedly connected to the support plate (13).

3. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 2, characterized in that, The top of the convex plate (26) is fixed with a horizontal plate (27), and the outer end of the horizontal plate (27) is rotatably connected with a connecting rod (28). The top of the two sets of side rails (22) is provided with a vertical frame (210). The two vertical surfaces of the vertical frame (210) are slidably connected with a sliding sleeve (29). The two connecting rods (28) on the same side of the plate (4) are rotatably connected to the sliding sleeve (29) through a rotating shaft. The top of the vertical frame (210) is fixedly connected to the extended end of the third spring telescopic plate (34).

4. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 1, characterized in that, The driving component (3) also includes: The third electric push rod (32), the second spring telescopic plate (33), and the base (39) are fixed on the surface of the fixed plate (31). The third electric push rod (32) is fixedly connected to the tail end of the third spring telescopic plate (34). The second spring telescopic plate (33) is fixed on the top of the fixed plate (31). The base (39) is rotatably installed on the extended end of the second spring telescopic plate (33) corresponding to the position of the connecting shaft (38). The second spring telescopic plate (33) and the storage end surface of the second spring telescopic plate (33) are provided with a movable notch (37). A fourth telescopic plate (36) is slidably connected inside the movable notch (37). The two ends of the fourth telescopic plate (36) are fixedly connected to the extended ends of the second spring telescopic plate (33) and the third spring telescopic plate (34).

5. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 4, characterized in that, The adjustment component (6) further includes: The moving frame (61) is rotatably mounted with a vertical shaft (63) corresponding to the position of the connecting shaft (38), and the outer surface of the vertical shaft (63) is rotatably sleeved with a driving wheel (62). The top of the slider (616) is rotatably mounted with a driven wheel (66). The two sides of the moving frame (61) are rotatably mounted with rotating plates (64). The outer end of the rotating plate (64) is rotatably connected with an auxiliary wheel (65). The outer surfaces of the driving wheel (62), the auxiliary wheel (65) and the driven wheel (66) are sleeved with an annular belt. The vertical shaft (63) and the base (39) are fixed with inserts (610) at the top, and the vertical shaft (63) and the connecting shaft (38) are fixed with slots (611) at the bottom.

6. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 5, characterized in that, A second bidirectional electric push rod (612) is fixed on the top surface of the drive wheel (62), and clamps (613) are fixed on the two extended ends of the second bidirectional electric push rod (612). The clamps (613) are clamped on the outer surface of the drive wheel (62). Among them, the driving wheel (62), the auxiliary wheel (65) and the driven wheel (66) are provided with limit posts (614) on both sides of the belt.

7. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 6, characterized in that, The top of the hexagonal block (68) is fixed to the outer ring of the vertical rod (67) with a first spring (69), and the top of the first spring (69) is fixedly connected to the bottom of the slider (616). A spring clip (617) is rotatably installed on one side of the slider (616), and the two sides of the spring clip (617) are clamped on the outer walls of the two sides of the moving frame (61). Among them, the hexagonal block (68) is equipped with a magnet plate (618) at the position of the outer wall on both sides of the movable frame (61) via a rotating shaft and a torsion spring.

8. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 7, characterized in that, The plug-in assembly (5) further includes: The adjustment frame (1) is provided with a sliding frame (52) at the front end of the test device (11). Inside the sliding frame (52), two sets of sliding plates (53) are slidably installed at the positions corresponding to the first insertion device (55) and the second insertion device (56). Inside the sliding plate (53), the insertion plate (54) is slidably inserted. The first insertion device (55) and the second insertion device (56) are rotatably installed at the bottom of the insertion plate (54) through a rotating shaft. The adjustment frame (1) has a fourth electric push rod (51) fixed inside both ends of the slide frame (52), and the extended end of the fourth electric push rod (51) is fixedly connected to the slide frame (52).

9. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 8, characterized in that, The insert plate (54) has a first locking bolt (57) threaded into the outer side of the rotating connecting shaft (38) of the first plug-in device (55) and the second plug-in device (56). The first locking bolt (57) is in contact with the rotating shaft of the first plug-in device (55) and the second plug-in device (56).

10. The adjustable resistor circuit board electrical parameter fine-tuning device according to claim 9, characterized in that: The slide plate (53) has a third locking bolt (59) threadedly inserted on the surface of the protruding end of the insert plate (54), and the third locking bolt (59) is in contact with the side of the insert plate (54). The slide plate (53) has a second locking bolt (58) threadedly inserted on the back, and the second locking bolt (58) is in contact with the slide frame (52).

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