Waveform testing device of large-size control board

Abstract

A waveform testing device for a large-size control board comprises a machine base, a positioning groove is formed in the surface of the machine base, a support is arranged on one side of the machine base, a lifting pressing rod is connected to the support, a testing pressing plate is arranged at the movable end of the lifting pressing rod, an elastic pressing rod and an elastic probe are fixed to the testing pressing plate, the elastic pressing rod comprises an adjusting head, and the adjusting head is connected with a sleeve rod. One end of the sleeve rod is movably sleeved with a pressing rod, an inner spring is arranged in the position between the sleeve rod and the pressing rod for elastic connection, the extension degree of the sleeve rod and the pressing rod can be adjusted through the adjusting head, the length of the elastic pressing rod is larger than that of the elastic probe, and the lifting pressing rod and the elastic pressing rod elastically abut against the control panel for positioning and pressing. According to the waveform testing device, the elastic probes are arranged on the control panel and abut against the corresponding testing contacts on the control panel, so that waveform testing of the control panel is achieved, and the problem that the elastic probes cannot be in good electrical contact with the testing contacts on the control panel due to deformation of the large-size control panel can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of UV power supply production, and particularly relates to a waveform testing device for a large-size control board. Background Art

[0002] A UV power supply, especially an intelligent UV power supply, includes a control board, a housing, a power board, an LED shunt board, etc. The control board is used to control the power board to turn on and light up the UV lamp beads in a high-voltage state and distribute and provide stable current to each UV lamp bead after the lamp is lit. The control board, referring to Figure 10 , includes a substrate, and a plurality of ballasts are arranged on the substrate to provide stable voltage for the modular LED lamp bead group. Therefore, before the control board is assembled into the UV power supply, it is necessary to perform waveform testing on the voltages generated at both ends of the multiple ballasts installed on it, so as to evaluate the voltage stability, change range and potential problems of the control board. By analyzing the stability, change range and potential problems of the voltage waveform, engineers can optimize the system design to ensure the normal operation of the UV power supply.

[0003] In the prior art, during the increasingly widespread use of UV power supplies, the UV power supplies are developing towards larger sizes. Correspondingly, the size of the control board on the UV power supply becomes larger and larger. Especially in the waveform testing device for a large-size control board, when using a conventional waveform testing device, during the positioning of the large-size control board, the large-size control board is prone to bending deformation. After deformation, the position of the test contact point where the elastic probe presses against the control board shifts, resulting in poor contact of some elastic probes with the corresponding test contact points. Furthermore, this affects the accuracy of the voltage and current conditions of the elastic probe on the test contact point, and further affects the judgment of the test result of the waveform testing of the control board by the tester. Summary of the Invention

[0004] The purpose of the utility model is to provide a waveform testing device for a large-size control board, aiming to solve the problem that the large-size control board is prone to bending deformation during the testing process, resulting in poor contact of the elastic probe with the test contact point, making the voltage and current conditions of the test contact point inaccurate, and further affecting the judgment of the test result of the waveform testing of the control board by the tester.

[0005] In view of this, the technical solution provided by the present utility model is as follows: A waveform testing device for a large-sized control board, including a machine base, on the surface of which there is a positioning groove for positioning the control board. On one side of the machine base, there is a bracket, and a lifting and pressing rod is connected to the bracket. At the movable end of the lifting and pressing rod, there is a testing pressing plate. Fixed on the testing pressing plate are a plurality of elastic pressing rods facing downward and a plurality of elastic probes surrounding the elastic pressing rods. The elastic pressing rods are adjustably arranged on the testing pressing plate. The elastic pressing rod includes an adjusting head fixed on the testing pressing plate. The inner thread of the adjusting head is connected with a sleeve rod. One end of the sleeve rod is movably sleeved with a pressing rod. The inside of the sleeve rod is hollow, and the inside of the pressing rod is also hollow. An internal spring is elastically connected between the sleeve rod and the pressing rod. By adjusting the threaded insertion position of the sleeve rod by the adjusting head, the lengths of the sleeve rod and the pressing rod extending below the testing pressing plate can be adjusted. The length of the elastic pressing rod is greater than the length of the elastic probe. By means of the lifting and pressing rod, the elastic pressing rod elastically presses against the control board for positioning and pressing, and the elastic probe abuts against the corresponding test contacts on the control board, thereby realizing the waveform testing of the control board.

[0006] Further, a plurality of positioning posts corresponding to the positioning holes of the control board are provided on the edge of the positioning groove. Through the positioning function of the positioning posts on the control board, the positioning accuracy of the control board is further improved.

[0007] Further, the end surface of the positioning post is flush with the surface of the machine base.

[0008] Further, a pair of hand slots are opened on the side wall of the positioning groove, and the hand slots penetrate through the outer wall surface of the machine base. By using the hand slots, the control board can be placed or taken out with both hands.

[0009] Further, the testing pressing plate includes a first pressing plate and a second pressing plate. Both the first pressing plate and the second pressing plate are rectangularly arranged. The length and width dimensions of the first pressing plate are larger than those of the second pressing plate. The second pressing plate is connected to the middle of the first pressing plate. The movable end of the lifting and pressing rod is connected to the second pressing plate. When the lifting and pressing rod presses down the testing pressing plate, the force of the lifting and pressing rod pressing down is evenly distributed on the first pressing plate through the second pressing plate, so that the elastic probes and elastic pressing rods on the first pressing plate obtain a balanced downward force, thereby better ensuring that after the lifting and pressing rod presses down, the elastic probes and elastic pressing rods on the first pressing plate can more evenly press the control board, ensuring good contact between the elastic probes and the test contacts on the control board.

[0010] Further, the machine base is provided with a pair of sliding rods, and the first pressing plate is provided with linear bearings corresponding to the sliding rods, and the sliding rods are sleeved in the linear bearings. Through the linear bearings, a sliding connection is formed between the sliding rods and the first pressing plate. The up and down movement of the first pressing plate is limited and slid by the sliding rods, improving the smoothness and precision of the elastic probes and elastic pressing rods on the first pressing plate.

[0011] Further, the first pressing plate and the second pressing plate are provided with oppositely arranged sliding sleeves, the sliding sleeves correspond to the tuning control keys of the control board, and a tuning rod is sleeved inside the opposite sliding sleeves. The sliding sleeve includes a sleeve, and the inner wall surface of the sleeve is circumferentially arrayed with multiple layers of elastic beads. The tuning rod is sleeved inside the sleeve and is movably clamped with the tuning rod through the elastic beads.

[0012] Further, the tuning rod includes a rod shaft for movably clamping inside the sleeve. The end of the rod shaft is provided with a rod shaft head, and a rotating groove is provided inside the rod shaft head. By using the tuning rod clamped inside the sleeve, the tuning rod can be elastically and movably clamped tightly, and it is convenient to manually slide the tuning rod downward from the upper part through the test pressing plate onto the tuning control key of the control board. Thus, during the waveform test of the control board, the tuning control key can be rotated by the tuning rod to tune the frequency of the oscillation circuit on the control board when performing the waveform test.

[0013] In the present utility model, after the control board is positioned through the positioning groove and further positioned by the positioning posts, the test pressing plate is stably pressed down by the lifting and pressing rod, so that the elastic pressing rod connected to the test pressing plate first elastically presses and fixes the control board preliminarily, preventing the large-sized control board from deforming when the elastic probe is pressed down for measurement, resulting in poor electrical contact between the elastic probe and the test contacts on the control board. After the control board is fixed by the elastic pressing rod, the waveform test of the circuit on the control board is then performed through the elastic probe.

[0014] In the present utility model, during the test of the control board, it is also necessary to adjust the frequency of the oscillation circuit in the circuit board for waveform test. Therefore, through the tuning rod that can be movably clamped and rotated, it is very convenient to tune the circuit on the control board by using the tuning rod. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model in the front view direction.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the present utility model in the rear view direction.

[0017] Figure 3 It is a structural schematic diagram of the test device connected with the control board.

[0018] Figure 4It is a schematic three-dimensional structure diagram of a test pressing plate.

[0019] Figure 5 It is a schematic three-dimensional structure diagram of an elastic pressure rod.

[0020] Figure 6 It is a schematic three-dimensional exploded structure diagram of an elastic pressure rod.

[0021] Figure 7 It is a schematic internal cross-sectional diagram of an elastic pressure rod.

[0022] Figure 8 It is a schematic three-dimensional structure diagram of a sliding sleeve.

[0023] Figure 9 It is a schematic three-dimensional structure diagram of an adjusting rod.

[0024] Figure 10 It is a schematic three-dimensional structure diagram of a control board.

[0025] Wherein: 1 - machine base, 11 - positioning groove, 12 - relief groove, 13 - positioning post, 14 - bracket, 15 - sliding rod, 16 - control panel, 17 - sliding rod fixing seat, 18 - hand groove, 19 - switch, 2 - step-up / down pressure rod, 21 - handle, 3 - test pressing plate, 31 - first pressing plate, 32 - second pressing plate, 33 - linear bearing, 4 - elastic probe, 5 - elastic pressure rod, 51 - sleeve rod, 511 - adjusting thread, 52 - adjusting head, 521 - adjusting shaft, 522 - clamping post, 53 - pressure rod, 54 - inner spring, 6 - tuning rod, 61 - rod shaft, 62 - rod shaft head, 63 - rotating groove, 7 - sliding sleeve, 71 - sleeve, 72 - elastic clamping bead, 8 - control board, 81 - ballast, 82 - positioning hole, 83 - tuning control key, 84 - tuning display board. Specific embodiments

[0026] The following briefly describes the embodiments of the present utility model with reference to the accompanying drawings.

[0027] In this embodiment, the large-sized control board 8, referring to Figure 10 , includes a substrate, and a plurality of ballasts 81 are arranged on the substrate to provide a stable voltage for the modular LED lamp bead group. A plurality of positioning holes 82 are provided at the edge of the substrate, and a tuning control key 83 is provided in the middle of the substrate. The tuning control key 83 is used to adjust the frequency of the oscillation circuit in the control board 8. A tuning display board 84 is further provided on one side of the tuning control key 83, and the tuning display board 84 is used to display the adjustment effect after the tuning control key 83 is adjusted.

[0028] A waveform test device for a large-sized control board, referring to 1 - Figure 3, including a machine base 1. A positioning groove 11 for positioning a control board 8 is formed on the surface of the machine base 1. A relief groove 12 for the protruding parts of the control board 8 is sunken in the positioning groove 11, so that the control board 8 can be better positioned and placed in the positioning groove 11. A plurality of positioning posts 13 corresponding to the positioning holes 82 of the control board 8 are arranged on the edge of the positioning groove 11. The end surface of the positioning post 13 is flush with the surface of the machine base 1, so that the positioning post 13 further positions the control board 8, improves the positioning accuracy of the control board 8, and avoids slight deformation after the large-sized control board 8 is positioned and laid flat. For the convenience of positioning and placing the control board 8 in the positioning groove 11 or quickly taking it out after the test is completed, a pair of hand grooves 18 are formed on the side wall of the positioning groove 11. The hand grooves 18 penetrate through the outer wall surface of the machine base 1. By using the hand grooves 18, the control board 8 can be placed or taken out with both hands.

[0029] Among them, a bracket 14 is arranged on one side of the machine base 1. A step-up / step-down lever 2 is connected to the bracket 14. A test pressure plate 3 is arranged at the end of the step-up / step-down lever 2. A plurality of elastic pressure rods 5 facing downward and a plurality of elastic probes 4 surrounding the elastic pressure rods 5 are fixed on the test pressure plate 3. The elastic pressure rods 5 are adjustable on the test pressure plate 3. The step-up / step-down lever 2 is used to control the up-and-down movement of the test pressure plate 3 above the control board 8, and make the elastic probes 4 of the test pressure plate 3 in linear contact with the test contacts on the control board 8, so as to realize the waveform test of the control board 8. Refer to Figure 4 , the test pressure plate 3 includes a first pressure plate 31 and a second pressure plate 32. Both the first pressure plate 31 and the second pressure plate 32 are rectangularly arranged. The length and width dimensions of the first pressure plate 31 are larger than those of the second pressure plate 32. The second pressure plate 32 is connected to the middle of the first pressure plate 31. Among them, the movable end of the step-up / step-down lever 2 is connected to the second pressure plate 32. The elastic probes 4 and the elastic pressure rods 5 are both installed on the first pressure plate 31. The elastic probes 4 adopt common test needles and are composed of high-performance springs with an average service life of 30,000 to 100,000 times. The elastic probes 4 are electrically connected to external display devices such as oscilloscopes. When the step-up / step-down lever 2 presses down the test pressure plate 3, the force applied by the step-up / step-down lever 2 is evenly distributed on the first pressure plate 31 through the second pressure plate 32, so that the elastic probes 4 and the elastic pressure rods 5 on the first pressure plate 31 receive balanced downward pressure, so that after the step-up / step-down lever 2 presses down, the elastic probes 4 on the first pressure plate 31 and the elastic pressure rods 5 can more evenly press the control board 8, ensuring good contact between the test contacts between the elastic probes 4 and the control board 8.

[0030] A switch 19 is arranged on the machine base 1, which is used to control the power-on of the test device. A control panel 16 is also arranged on the bracket 14 of the machine base 1. The control panel 16 can well realize the input control of test conditions such as voltage and current magnitude during the product test.

[0031] Refer toFigure 5 , Figure 6 , Figure 7 , the elastic pressure rod 5 includes an adjusting head 52 fixed on the test pressing plate 3. The adjusting head 52 is provided with adjusting shafts 521 at both ends. A clamping column 522 is arranged between the adjusting shafts 521 at both ends. The inside of the adjusting head 52 is provided with internal threads. The adjusting head 52 is fixedly connected by clamping the clamping column 522 on the first pressing plate 31. A sleeve rod 51 is connected to the internal threads of the adjusting head 52. One end of the sleeve rod 51 is movably sleeved with a pressure rod 53. The inside of the sleeve rod 51 is hollow. The inside of the pressure rod 53 is hollow. An internal spring 54 is arranged inside between the sleeve rod 51 and the pressure rod 53 for elastic connection. After the elastic connection of the internal spring 54, the pressure rod 53 can be elastically movably sleeved on the sleeve rod 51. The other end of the sleeve rod 51 is provided with an adjusting thread 511, and the adjusting thread 511 and the adjusting head 52 are in threaded fit. By adjusting the threaded insertion position of the sleeve rod 51 by the adjusting head 52, the lengths of the sleeve rod 51 and the pressure rod 53 extending below the first pressing plate 31 of the test pressing plate 3 can be adjusted. After adjustment, the length of the elastic pressure rod 5 is greater than the length of the elastic probe 4. When the lifting and lowering pressure rod 2 is lifted and lowered, by rotating the movable end of the lifting and lowering pressure rod 2 through the handle 21, the movable end of the lifting and lowering pressure rod 2 drives the test pressing plate 3 to press down. Since the length of the elastic pressure rod 5 is longer than the length of the elastic probe 4, the elastic pressure rod 5 preferentially presses and controls the positioning and pressing of the control board 8 elastically. After the control board 8 is positioned and pressed by the elastic pressure rod 5, the bottom of the control board 8 can be well attached to the positioning groove 11 of the machine base 1. After the elastic pressure rod 5 presses and fixes the control board 8, the bending deformation of different parts of the large-sized control board 8 at different positions after positioning and placement is avoided, and thus the complete fixation of the control board 8 at the peripheral position of the elastic pressure rod 5 is ensured. After the control board 8 is pressed and positioned, the elastic probe 4 surrounding the elastic pressure rod 5 abuts against the corresponding test contacts on the control board 8 to realize the waveform test of the control board 8.

[0032] In this embodiment, the machine base 1 is provided with a pair of sliding rods 15. One end of the sliding rod 15 is fixed on the machine base 1, and the other end of the sliding rod 15 is fixed on the support 14 from above through a sliding rod fixing seat 17. The first pressing plate 31 is provided with a linear bearing 33 corresponding to the sliding rod 15. The sliding rod 15 is sleeved in the linear bearing 33. Through the linear bearing 33, a sliding connection is formed between the sliding rod 15 and the first pressing plate 31. The up and down movement of the first pressing plate 31 is limited and slid by the sliding rod 15, improving the smoothness and accuracy of the elastic probe 4 and the elastic pressure rod 5 of the first pressing plate 31.

[0033] In this embodiment, during the waveform test of the control board 8, it is also necessary to tune the frequency of the oscillation circuit of the control board 8. Therefore, sliding sleeves 7 are provided on the first pressing plate 31 and the second pressing plate 32 in a relative manner. The sliding sleeves 7 correspond to the tuning control keys 83 of the control board 8. A tuning rod 6 is sleeved inside the relative sliding sleeves 7. Refer toFigure 8 , Figure 9 , the sliding sleeve 7 includes a sleeve 71, and a plurality of layers of elastic beads 72 are circumferentially arrayed on the inner wall surface of the sleeve 71. The elastic beads 72 are elastically telescoped and installed on the inner wall surface of the sleeve 71. The tuning rod 6 includes a rod shaft 61 for movably clamping in the sleeve 71. A rod shaft head 62 is provided at the end of the rod shaft 61, and a rotating groove 63 is provided inside the rod shaft head 62. The tuning rod 6 is sleeved in the sleeve 71 through its rod shaft 61 and is movably clamped with the rod shaft 61 of the tuning rod 6 through the elastic beads 72. The rod shaft 61 of the tuning rod 6 can move and rotate. Before adjustment, the tuning rod 6 is located above the tuning control key 83. During adjustment, the tuning rod 6 is manually pressed down on the tuning control key 83. The rotating groove 63 cooperates with the tuning control key 83. By rotating the tuning rod 6, the tuning rod 6 can rotate the tuning control key 83, and the adjustment result is displayed through the tuning display board 84. Therefore, during the waveform test of the control board 8, the frequency of the oscillation circuit on the control board 8 can be tuned through the tuning rod 6.

[0034] The above embodiments only express the implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A waveform testing device for a large-size control panel, comprising a machine base, a positioning groove for positioning the control panel is provided on the surface of the machine base, a bracket is provided on one side of the machine base, a lifting pressure rod is connected to the bracket, a test pressure plate is provided at the movable end of the lifting pressure rod, a plurality of elastic pressure rods facing downward and a plurality of elastic probes surrounding the elastic pressure rods are fixed on the test pressure plate, characterized in that: The elastic pressure rod is adjustably arranged on the test pressure plate, and the elastic pressure rod comprises an adjusting head fixed on the test pressure plate, the internal thread of the adjusting head is connected with a sleeve rod, one end of the sleeve rod is movably sleeved with the pressure rod, the interior of the sleeve rod is hollow, the interior of the pressure rod is hollow, and an internal spring is elastically connected between the sleeve rod and the pressure rod, and the length of the sleeve rod and the pressure rod extending below the test pressure plate can be adjusted by screwing the sleeve rod into the threaded position of the adjusting head, the length of the elastic pressure rod is greater than the length of the elastic probe, and the elastic pressure rod is elastically pressed against the control plate to position and tighten it by means of the lifting and lowering pressure rod, and the elastic probe abuts against the corresponding test contact on the control plate.

2. A waveform testing device for a large-size control panel according to claim 1, characterized in that: A plurality of positioning posts corresponding to the positioning holes of the control panel are arranged on the edge of the positioning groove.

3. A waveform testing device for a large-size control panel according to claim 2, characterized in that: The end surface of the positioning column is flush with the surface of the machine base.

4. A waveform testing device for a large-size control panel according to claim 3, characterized in that: A pair of hand grooves are arranged on the side wall of the positioning groove, and the hand grooves pass through the outer wall surface of the base.

5. The waveform testing device for a large-size control panel according to claim 1, characterized in that: The test pressure plate includes a first pressure plate and a second pressure plate. The first pressure plate and the second pressure plate are both rectangular. The length and width of the first pressure plate are greater than the length and width of the second pressure plate. The second pressure plate is connected to the middle part of the first pressure plate, and the movable end of the lifting pressure rod is connected to the second pressure plate.

6. A waveform testing device for a large-size control panel according to claim 5, characterized in that: The machine base is provided with a pair of sliding rods, the first pressing plate is provided with linear bearings corresponding to the sliding rods, and the sliding rods are sleeved in the linear bearings.

7. The waveform testing device for a large-size control panel according to claim 5, characterized in that: The first pressing plate and the second pressing plate are provided with sliding sleeves arranged opposite to each other, the sliding sleeves correspond to the tuning control keys of the control panel, a tuning rod is sleeved inside the sliding sleeves, the sliding sleeves include a sleeve, a plurality of layers of elastic beads are arranged in a circular array on the inner wall surface of the sleeve, the tuning rod is sleeved in the sleeve and movably engaged with the tuning rod through the elastic beads.

8. A waveform testing device for a large-size control panel according to claim 7, characterized in that: The tuning rod comprises a rod shaft for being movably clamped in a sleeve, a rod shaft head is arranged at the end of the rod shaft, and a rotation groove is arranged inside the rod shaft head.

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