Circuit testing device for water meter processing

Abstract

The invention relates to the technical field of circuit testing, and discloses a circuit testing device for water meter processing, which comprises a working table, a vacuum box is fixedly mounted at the top of the working table, a lifting plate is mounted at the bottom of the vacuum box, and a first cylinder is fixedly mounted at the top in the working table; a telescopic rod of the first air cylinder penetrates through the inner top of the workbench and the inner bottom of the vacuum box and is fixedly connected with the bottom of the lifting plate. The mechanical stress in actual use is simulated through the clamping part, the circuit board is twisted or bent, data obtained after state change is compared with original data, the influence of bending or twisting on the performance of the circuit board is obtained, it can be ensured that the circuit board can still work normally when subjected to the stress, and the circuit board performance is improved. Therefore, the reliability and durability of the product are improved, potential defects such as solder ball cracking, circuit damage, pad tilting and substrate cracking in the design can be identified, correction is carried out before the product is put into the market, and the risk of fault occurrence is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of circuit testing, in particular to a circuit testing device for water meter processing. Background Art

[0002] The most basic function of a water meter is to measure water usage in homes, businesses or industrial applications, ensuring that users pay for water according to the actual amount of water used. By monitoring water usage, users can better manage water resources, identify and reduce waste, and thus promote sustainable development. The circuit of the water meter is responsible for processing and transmitting the meter reading data. By testing the water meter circuit, you can ensure that the circuit board accurately records and reports water usage, which is essential for the calculation of water bills and the management of water resources.

[0003] For example, Chinese patent publication number CN115877188B, this application relates to an ultrasonic water meter circuit detection device, which relates to the technical field of production detection, including: a base, a simulation component, a disassembly component and a detection component, a circuit board slot for placing a circuit board is provided on the horizontal side of the base, the disassembly component is arranged in the circuit board slot, an ammeter installation box is arranged on the vertical side of the base, an ammeter installation slot is provided on the surface of the ammeter installation box, an installation guide is provided on the side of the ammeter installation box away from the base, the simulation component is arranged in the installation guide, a terminal installation slot is provided on the side of the base away from the ammeter installation slot, and the detection component is arranged in the ammeter installation slot, the circuit board slot and the terminal installation slot respectively. This application has the effect of improving the accuracy and efficiency of circuit board testing.

[0004] When this type of circuit detection device is working, the ultrasonic transducer can be immersed in the transducer package core tube filled with water to simulate the working state of an ultrasonic water meter. However, in actual use, if the water meter casing is subjected to high water pressure for a long time, the material of the water meter casing may fatigue, resulting in accumulation of tiny deformations, thereby exerting mechanical stress on the internal circuit board, causing it to bend or twist, thereby affecting the connection and performance of the components on the circuit board. Therefore, it is necessary to perform circuit detection on the circuit board that is subjected to mechanical stress. Summary of the invention

[0005] The object of the present invention is to provide a circuit testing device for water meter processing to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a circuit testing device for water meter processing, comprising a workbench, a vacuum box is fixedly installed on the top of the workbench, a lifting plate is installed on the bottom of the vacuum box, a first cylinder is fixedly installed on the top of the workbench, a telescopic rod of the first cylinder passes through the top of the workbench and the bottom of the vacuum box and is fixedly connected to the bottom of the lifting plate, and a spring contact pin for contacting and electrifying a circuit board is fixedly installed on the top of the lifting plate;

[0007] The invention also includes a clamping assembly disposed in the vacuum box and capable of clamping the circuit board, wherein the clamping assembly includes a clamping portion, and the clamping portion can switch the circuit board between two states:

[0008] State 1: the clamping portion can change the circuit board from a straight state to a bent state;

[0009] In state two, the clamping portion can change the circuit board from a straight state to a twisted state.

[0010] Preferably, the clamping assembly comprises two mounting seats fixedly mounted on the bottom of the vacuum box and arranged opposite to each other, the clamping portion is two clamping strips, and the two clamping strips are both mounted between the outer walls of the mounting seats;

[0011] The clamping assembly also includes a transmission assembly, which has two functions:

[0012] Function 1: Make the two clamp strips move closer to or farther from each other in the horizontal direction;

[0013] Function 2: The two clamp strips are rotated and adjusted relative to each other in the horizontal direction, and the plane formed between the two clamp strips is distorted.

[0014] Preferably, the transmission assembly comprises two V-shaped frames respectively slidably mounted on the outer walls of the two mounting seats, sliding pins are installed on both sides of the two clamp strips, and two supporting walls of the V-shaped frame are provided with sliding grooves that can enable the sliding pins to slide inside, and the sliding pins on both sides of the clamp strip are respectively slidably mounted in the sliding grooves corresponding to the two V-shaped frames, and mounting frames are fixedly mounted at the folding points of the two V-shaped frames, and a transmission rod is connected between the two mounting frames through a sliding groove and sliding pin structure;

[0015] The transmission assembly also includes a drive assembly capable of switching the transmission rod between horizontal rotation adjustment and vertical up and down adjustment;

[0016] The transmission assembly also includes a limit assembly arranged on the mounting seat, and the limit assembly can switch the sliding pin and the V-shaped frame between horizontal adjustment and vertical adjustment, and the switching between the two is opposite.

[0017] Preferably, the limit assembly includes two first cross grooves and a second cross groove provided on the outer wall of the mounting seat, a first slider is slidably installed in the first cross groove, a second slider is slidably installed in the second cross groove, and the first slider is fixedly connected to one side of the sliding pin, and the second slider is fixedly connected to the bending point of the V-shaped frame, and a first telescopic protrusion that can be telescopic in the horizontal direction and a second telescopic protrusion that can be telescopic in the vertical direction are slidably installed in the first slider and the second slider;

[0018] The limit assembly also includes two electromagnets installed inside the first slider and the second slider, and magnetic cores are installed inside the first telescopic protrusion and the second telescopic protrusion. The two electromagnets can respectively control the extension and retraction of the first telescopic protrusion and the second telescopic protrusion.

[0019] Preferably, the driving assembly includes a power rod fixedly mounted on the top center of the transmission rod, the power rod is driven to adjust vertically up and down by a second cylinder mounted on the top of the vacuum box, a driven gear is fixedly mounted on the outer wall of the power rod, a transmission gear is rotatably mounted on the top of the vacuum box, and the transmission gear is driven to rotate by a motor mounted on the top of the vacuum box, and the driven gear is always in mesh with the transmission gear.

[0020] Preferably, the vacuum box is externally connected to a vacuum pump and a vacuum gauge, and a high-precision pressure sensor is installed inside the vacuum box.

[0021] Preferably, the clamp strip is composed of an elastic clamp strip and two clamping blocks fixed at both ends thereof, the clamping blocks and the elastic clamp strip are both provided with openings for inserting the circuit board, a pin shaft is rotatably mounted on the top of the clamping block for clamping the circuit board, and the elastic clamp strip can change shape as the circuit board changes.

[0022] Preferably, a circular groove is formed on the outer wall of the clamping block, the sliding pin extends into the circular groove, the portion of the sliding pin extending into the circular groove is a spherical body, and the radius of the spherical surface of the spherical body is smaller than the radius of the spherical surface of the circular groove.

[0023] Preferably, when the circuit board is in a straight state, the spring contact pin will shrink toward the lifting plate after contacting the circuit board.

[0024] Preferably, an observation glass plate is installed on the outer wall of the vacuum box.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention simulates the mechanical stress in actual use through the clamping part, causing the circuit board to twist or bend, and compares the data after the state is changed with the original data to obtain the influence of the bending or twisting on the performance of the circuit board, which can ensure that the circuit board can still work normally when subjected to these stresses, thereby improving the reliability and durability of the product, and can help identify potential defects in the design, such as solder ball cracking, circuit damage, pad lift and substrate cracking, so as to make corrections before the product is put on the market and reduce the risk of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A perspective view of the present invention;

[0028] Figure 2 It is a front view of the present invention;

[0029] Figure 3 It is a front cross-sectional view of the present invention;

[0030] Figure 4 This is a three-dimensional diagram of the present invention after removing the workbench and the vacuum box;

[0031] Figure 5 This is a front view of the present invention after removing the workbench and the vacuum box;

[0032] Figure 6 It is a cross-sectional schematic diagram of the sliding pin and the clamping block of the present invention;

[0033] Figure 7 It is a schematic diagram of the first telescopic protrusion and the second telescopic protrusion in the first sliding block of the present invention after being extended;

[0034] Figure 8 Schematic diagram of the V-shaped frame and the cross groove in the present invention;

[0035] Fig. 9 A schematic diagram of a twisted state of a circuit board of the present invention;

[0036] Fig.10 It is a schematic diagram of the circuit board of the present invention in a bent state.

[0037] In the figure: 1. workbench; 2. vacuum box; 3. observation glass plate; 4. mounting seat; 5. V-shaped frame; 6. lifting plate; 7. first cylinder; 8. spring contact pin; 9. circuit board; 10. clamping block; 11. elastic clamping strip; 12. latch; 13. slide groove; 14. second cross groove; 15. first cross groove; 16. first slider; 17. transmission rod; 18. mounting frame; 19. second slider; 20. power rod; 21. driven gear; 22. transmission gear; 23. sliding pin; 24. circular groove; 25. spherical body; 26. first telescopic protrusion; 27. second telescopic protrusion; 28. second cylinder. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figures 1 to 10 The present invention provides a technical solution: a circuit testing device for water meter processing, comprising a workbench 1, a vacuum box 2 is fixedly installed on the top of the workbench 1, a lifting plate 6 is installed on the bottom of the vacuum box 2, a first cylinder 7 is fixedly installed on the top of the workbench 1, a telescopic rod of the first cylinder 7 passes through the top of the workbench 1 and the bottom of the vacuum box 2 and is fixedly connected to the bottom of the lifting plate 6, and a spring contact pin 8 for contacting and electrifying a circuit board 9 is fixedly installed on the top of the lifting plate 6;

[0040] The invention also includes a clamping assembly disposed in the vacuum box 2 and capable of clamping the circuit board 9. The clamping assembly includes a clamping portion, and the clamping portion can switch the circuit board 9 between two states:

[0041] State 1: the clamping portion can change the circuit board 9 from a straight state to a bent state;

[0042] In state 2, the clamping portion can change the circuit board 9 from a straight state to a twisted state.

[0043] When the device is used, the vacuum box 2 is opened, and the circuit board 9 to be tested is fixed by the clamping assembly. Figure 3 , start the first cylinder 7, so that the lifting plate 6 rises and moves towards the circuit board 9, so that the spring contact pin 8 contacts the circuit board 9, is energized and records data, and this data is used as the original data. After the recording is completed, the first cylinder 7 is driven to separate the spring contact pin 8 from the circuit board 9.

[0044] In actual use, since the water meter shell is subjected to high water pressure for a long time, the material of the water meter shell may fatigue, resulting in the accumulation of small deformations, thereby applying mechanical stress to the internal circuit board 9 to cause it to bend or twist. Therefore, when testing the circuit board 9, it is necessary to perform performance tests when it is subjected to different mechanical stresses. The specific detection method is as follows:

[0045] When it is necessary to test the performance of the circuit board 9 when it is bent, the circuit board 9 is changed from a straight state to a bent state through the clamping portion. Fig.10In the state shown, the first cylinder 7 drives the spring contact pin 8 to detect the bent circuit board 9 and record the data; when it is necessary to test the performance of the circuit board 9 after the distortion, the circuit board 9 is changed from the straight state to the distorted state through the clamping part, that is, Fig. 9 In the state shown, the first cylinder 7 drives the spring contact pin 8 to detect the bent circuit board 9 and record the data. The data after the circuit board 9 changes state is compared with the original data to obtain the influence of bending or twisting on the performance of the circuit board 9. The clamping part simulates the mechanical stress in actual use to make the circuit board 9 twisted or bent, which can ensure that the circuit board 9 can still work normally when subjected to these stresses, thereby improving the reliability and durability of the product, and can help identify potential defects in the design, such as solder ball cracking, circuit damage, pad lift and substrate cracking, so as to make corrections before the product is put on the market and reduce the risk of failure.

[0046] It is worth mentioning that when the circuit board 9 is changed in state by the clamping portion, the degree of change of the state of the circuit board 9 can be controlled to record the performance of the circuit board 9 under different deformation degrees.

[0047] Furthermore, the clamping assembly includes two mounting seats 4 fixedly mounted on the bottom of the vacuum box 2 and arranged opposite to each other, and the clamping portion is two clamping strips, and the two clamping strips are both mounted between the outer walls of the mounting seats 4;

[0048] The clamping assembly also includes a transmission assembly, which has two functions:

[0049] Function 1: Make the two clamp strips move closer to or farther from each other in the horizontal direction;

[0050] Function 2: The two clamp strips are rotated and adjusted relative to each other in the horizontal direction, and the plane formed between the two clamp strips is distorted.

[0051] See also Figure 3 as well as Figure 4 When the circuit board 9 needs to be inspected, the circuit board 9 is fixed by two clamp bars. When the bent circuit board 9 needs to be inspected, the two clamp bars are brought close to each other in the horizontal direction by the transmission component, so that the circuit board 9 is bent, and then the spring contact pin 8 is driven to contact the circuit board 9 and power on for inspection;

[0052] When the twisted circuit board 9 needs to be tested, the two clamp bars are rotated and adjusted relative to each other in the horizontal direction through the transmission component, so that the circuit board 9 between the two clamp bars is twisted, and then the spring contact pin 8 is driven to contact the circuit board 9 and power on for testing. Through the two functions of the transmission component, the circuit board 9 can be changed from a straight state to a bent state or a twisted state to simulate the slight deformation that may occur in the use of the water meter, causing the circuit board 9 to deform, and then the spring contact pin 8 is brought into contact with the circuit board 9 and powered on for testing, so as to detect the circuit stability of the circuit board 9 when it is subjected to mechanical stress and monitor the changes in its electrical performance.

[0053] Further, the transmission assembly includes two V-shaped frames 5 respectively slidably mounted on the outer walls of the two mounting seats 4, sliding pins 23 are installed on both sides of the two clamp strips, and the two supporting walls of the V-shaped frame 5 are provided with sliding grooves 13 that enable the sliding pins 23 to slide inside, and the sliding pins 23 on both sides of the clamp strip are respectively slidably mounted in the sliding grooves 13 corresponding to the two V-shaped frames 5, and the two V-shaped frames 5 are fixedly mounted with mounting frames 18 at the folding points, and the two mounting frames 18 are connected with a transmission rod 17 through a sliding groove and sliding pin structure;

[0054] The transmission assembly also includes a drive assembly that enables the transmission rod 17 to switch between horizontal rotation adjustment and vertical up and down adjustment;

[0055] The transmission assembly also includes a limit assembly arranged on the mounting seat 4, and the limit assembly can switch the sliding pin 23 and the V-shaped frame 5 between horizontal adjustment and vertical adjustment, and the switching between the two is opposite.

[0056] When the two clamp strips need to be moved closer to or farther from each other in the horizontal direction, that is, to achieve the above-mentioned function 1, the states of the sliding pin 23 and the V-shaped frame 5 are first switched through the limit assembly, that is, the sliding pin 23 can only be slid and adjusted in the horizontal direction, and the V-shaped frame 5 can only be slid and adjusted in the vertical direction. At this time, the driving assembly is used to move the transmission rod 17 vertically downward, thereby driving the V-shaped frame 5 to move downward. Under the action of the two slide grooves 13, the two sliding pins 23 move closer to each other, thereby making the two clamp strips closer to each other, so as to complete the above-mentioned switching of the bending state of the circuit board 9;

[0057] When it is necessary to transform the circuit board 9 from a straight state to a twisted state, that is, to realize the above-mentioned function 2, firstly, the states of the sliding pin 23 and the V-shaped frame 5 are switched through the limit assembly, that is, the sliding pin 23 can only be slid and adjusted in the vertical direction, and the V-shaped frame 5 can only be slid and adjusted in the horizontal direction. At this time, the transmission rod 17 is rotated in the horizontal direction through the driving assembly, thereby driving the V-shaped frame 5 to move in the horizontal direction. Under the action of the two slide grooves 13, the two adjacent sliding pins 23 move in opposite directions in the vertical direction. Since the moving directions of the two V-shaped frames 5 are opposite, the moving directions of the sliding pins 23 on both sides are also opposite, thereby distorting the plane formed by the two clamp strips, that is, twisting the circuit board 9, so as to complete the above-mentioned switching of the twisted state of the circuit board 9.

[0058] Among them, it is worth noting that Figure 4 The purpose of the slide groove and slide pin structure is to avoid travel interference between the transmission rod 17 and the V-shaped frame 5 during the rotation process. Its specific structure is that the outer wall of the mounting frame 18 is provided with an opening for the transmission rod 17 to be inserted, and a pin shaft is installed through the outer wall of the transmission rod 17. The mounting frame 18 is provided with a notch that passes through the top and the bottom, and the pin shaft on the outer wall of the transmission rod 17 can slide in the notch, so the transmission rod 17 can drive the two V-shaped frames 5 to move relative to or away from each other when rotating and adjusting.

[0059] Further, the limit assembly includes two first cross grooves 15 and a second cross groove 14 provided on the outer wall of the mounting seat 4, a first slider 16 is slidably installed in the first cross groove 15, a second slider 19 is slidably installed in the second cross groove 14, and the first slider 16 is fixedly connected to one side of the sliding pin 23, and the second slider 19 is fixedly connected to the bending point of the V-shaped frame 5, and a first telescopic protrusion 26 that can be telescopic in the horizontal direction and a second telescopic protrusion 27 that can be telescopic in the vertical direction are slidably installed in the first slider 16 and the second slider 19;

[0060] The limit assembly also includes two electromagnets installed inside the first slider 16 and the second slider 19. The first telescopic protrusion 26 and the second telescopic protrusion 27 are both installed with magnetic cores. The two electromagnets can control the extension and retraction of the first telescopic protrusion 26 and the second telescopic protrusion 27 respectively.

[0061] See also Figure 4 , Figure 7 as well as Figure 8When the circuit board 9 is changed from a straight state to a bent state, the first telescopic protrusion 26 in the first slider 16 is horizontally telescoped outward by the electromagnet, so that the first slider 16 is extended to a certain extent in the horizontal direction, and the first slider 16 can only slide in the transverse groove of the first cross groove 15. At the same time, the second telescopic protrusion 27 in the second slider 19 is vertically telescoped outward, so that the second slider 19 is extended to a certain extent in the vertical direction, and the second slider 19 can only slide in the vertical groove of the second cross groove 14. The transmission rod 17 is moved downward by the driving assembly, and under the cooperation of the slide groove 13 and the sliding pin 23, the two clamp strips are brought close to each other, thereby achieving the purpose of bending the circuit board 9.

[0062] On the contrary, when the circuit board 9 needs to be transformed from a straight state to a twisted state, the second telescopic protrusion 27 in the first slider 16 is vertically telescoped outward by the electromagnet, so that the first slider 16 is extended to a certain extent in the vertical direction, and the first slider 16 can only slide in the vertical groove of the first cross groove 15. At the same time, the first telescopic protrusion 26 in the second slider 19 is horizontally telescoped outward, so that the second slider 19 is extended to a certain extent in the horizontal direction, and the second slider 19 can only slide in the transverse groove of the second cross groove 14. The transmission rod 17 is rotated in the horizontal direction by the driving assembly, and with the cooperation of the slide groove 13 and the sliding pin 23, the plane formed by the two clamp strips will be distorted, thereby causing the circuit board 9 to be distorted.

[0063] In this way, by controlling the extension and retraction of the telescopic protrusions in the two sliders in different directions, the sliding limit of the two sliders in different directions can be controlled, thereby achieving the above-mentioned switching between different states of the circuit board 9.

[0064] Furthermore, the driving assembly includes a power rod 20 fixedly installed on the center top of the transmission rod 17. The power rod 20 is driven to adjust vertically up and down by a second cylinder 28 installed on the top of the vacuum box 2. A driven gear 21 is fixedly installed on the outer wall of the power rod 20. A transmission gear 22 is rotatably installed on the top of the vacuum box 2, and the transmission gear 22 is driven to rotate by a motor installed on the top of the vacuum box 2. The driven gear 21 and the transmission gear 22 are always in meshing relationship.

[0065] See also Figure 3 When the transmission rod 17 needs to be moved downward or moved upward to reset, the second cylinder 28 drives the power rod 20 to move vertically, thereby causing the transmission rod 17 to move up and down; when the transmission rod 17 needs to be rotated in the horizontal direction, the motor drives the transmission gear 22 to rotate, thereby causing the driven gear 21 to rotate, thereby driving the power rod 20 and the transmission rod 17 to rotate. By driving the transmission rod 17 to move up and down and rotate horizontally, the circuit board 9 can be transformed from a straight state to a bent or twisted state.

[0066] Furthermore, the vacuum box 2 is externally connected to a vacuum pump and a vacuum gauge, and a high-precision pressure sensor is installed inside the vacuum box 2 .

[0067] In a highly vacuum environment, if there are tiny holes or gaps on the circuit board 9, very few gas molecules in the vacuum box 2 may still enter the circuit board 9 through these holes. These tiny leaks can be detected by monitoring the slight changes in pressure in the vacuum box 2 with precise sensors, thereby evaluating the sealing performance of the circuit board 9. The vacuum environment is used to simulate the underwater environment. By placing the circuit board 9 in the vacuum chamber and creating a vacuum, it is detected whether there is gas penetrating into the circuit board 9. If the circuit board 9 can remain stable for a long time in the vacuum environment, it can be determined that it has good waterproof performance.

[0068] Furthermore, the clamp strip is composed of an elastic clamp strip 11 and two clamping blocks 10 fixed at both ends thereof. The clamping blocks 10 and the elastic clamp strip 11 are both provided with openings for inserting the circuit board 9. A pin 12 is rotatably installed on the top of the clamping block 10 for clamping the circuit board 9. The elastic clamp strip 11 can change shape as the circuit board 9 changes.

[0069] See also Figure 4 The clamp strip is composed of an elastic clamp strip 11 and two clamping blocks 10 fixed at both ends thereof. When the circuit board 9 needs to be inspected, the pin 12 on the top of the clamping block 10 is first unscrewed, the circuit board 9 is placed in the opening formed by the clamping block 10 and the elastic clamp strip 11, and then the pin 12 is screwed in to complete the purpose of clamping the circuit board 9.

[0070] It is worth mentioning that the elastic clamping strip 11 can change shape as the circuit board 9 changes, so that the circuit board 9 can be subjected to more uniform force when twisted or bent.

[0071] Furthermore, a circular groove 24 is formed on the outer wall of the clamping block 10 , and the sliding pin 23 extends into the circular groove 24 . The portion of the sliding pin 23 extending into the circular groove 24 is a spherical body 25 , and the radius of the spherical surface of the spherical body 25 is smaller than the radius of the spherical surface of the circular groove 24 .

[0072] When the V-shaped frame 5 moves in the horizontal direction, the two clamping blocks 10 near the mounting seat 4 will move in the opposite direction in the vertical direction, so that the distance between the two clamping blocks 10 becomes farther, and then the circuit board 9 gradually escapes from the clamping of the clamping blocks 10. Figure 6 There is a certain gap between the spherical body 25 and the circular groove 24. Through the cooperation between the circular groove 24 and the spherical body 25, when the two clamping blocks 10 move in opposite directions in the vertical direction, the circular groove 24 will move in the spherical body 25, thereby compensating for the distance between the two clamping blocks 10 and preventing the circuit board 9 from escaping from the clamping of the clamping blocks 10.

[0073] Furthermore, when the circuit board 9 is in a straight state, the spring contact pins 8 will shrink toward the lifting plate 6 after contacting the circuit board 9 .

[0074] When the circuit board 9 needs to be bent, the circuit board 9 may be bent upward. When the circuit board 9 is in a straight state, the spring contact pin 8 will shrink toward the lifting plate 6 after contacting the circuit board 9 to ensure that the spring contact pin 8 can still contact the circuit board 9 after the circuit board 9 is bent upward.

[0075] Furthermore, an observation glass plate 3 is installed on the outer wall of the vacuum box 2 .

[0076] See also Figure 1 , it is possible to observe the glass plate 3 to see whether the circuit board 9 will cause the connection points or solder joints on the circuit board 9 to be displaced due to bending or twisting.

[0077] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit testing device for water meter processing, comprising a workbench (1), characterized in that: A vacuum box (2) is fixedly mounted on the top of the workbench (1), a lifting plate (6) is mounted on the bottom of the vacuum box (2), a first cylinder (7) is fixedly mounted on the top of the workbench (1), a telescopic rod of the first cylinder (7) passes through the top of the workbench (1) and the bottom of the vacuum box (2) and is fixedly connected to the bottom of the lifting plate (6), and a spring contact pin (8) for contacting and energizing a circuit board (9) is fixedly mounted on the top of the lifting plate (6); It also includes a clamping assembly arranged in the vacuum box (2) and capable of clamping the circuit board (9), wherein the clamping assembly includes a clamping portion, and the clamping portion is capable of switching the circuit board (9) between two states: State one, the clamping portion can change the circuit board (9) from a straight state to a bent state; In state two, the clamping portion can change the circuit board (9) from a straight state to a twisted state.

2. A circuit testing device for water meter processing according to claim 1, characterized in that: The clamping assembly comprises two mounting seats (4) fixedly mounted on the bottom of the vacuum box (2) and arranged opposite to each other, the clamping portion is two clamping strips, and the two clamping strips are both mounted between the outer walls of the mounting seats (4); The clamping assembly also includes a transmission assembly, which has two functions: Function 1: Make the two clamp strips move closer to or farther from each other in the horizontal direction; Function 2: The two clamp strips are rotated and adjusted relative to each other in the horizontal direction, and the plane formed between the two clamp strips is distorted.

3. A circuit testing device for water meter processing according to claim 2, characterized in that: The transmission assembly comprises two V-shaped frames (5) respectively slidably mounted on the outer walls of the two mounting seats (4), a sliding pin (23) is mounted on both sides of the two clamp strips, a sliding groove (13) is provided on the two supporting walls of the V-shaped frame (5) for the sliding pin (23) to slide inside, and the sliding pins (23) on both sides of the clamp strip are respectively slidably mounted in the sliding grooves (13) corresponding to the two V-shaped frames (5), a mounting frame (18) is fixedly mounted at the folding points of the two V-shaped frames (5), and a transmission rod (17) is connected between the two mounting frames (18) via a sliding groove and sliding pin structure; The transmission assembly also includes a driving assembly capable of switching the transmission rod (17) between horizontal rotation adjustment and vertical up and down adjustment; The transmission assembly also includes a limit assembly arranged on the mounting seat (4), and the limit assembly can switch the sliding pin (23) and the V-shaped frame (5) between horizontal adjustment and vertical adjustment, and the switching between the two is opposite.

4. A circuit testing device for water meter processing according to claim 3, characterized in that: The limit assembly comprises two first cross grooves (15) and a second cross groove (14) provided on the outer wall of the mounting seat (4); a first slider (16) is slidably mounted in the first cross groove (15); a second slider (19) is slidably mounted in the second cross groove (14); the first slider (16) is fixedly connected to one side of a sliding pin (23); the second slider (19) is fixedly connected to a folding point of the V-shaped frame (5); a first telescopic protrusion (26) that can be telescoped in a horizontal direction and a second telescopic protrusion (27) that can be telescoped in a vertical direction are slidably mounted in the interior of the first slider (16) and the second slider (19); The limit assembly further comprises two electromagnets installed inside the first slider (16) and the second slider (19), and magnetic cores are installed inside the first telescopic protrusion (26) and the second telescopic protrusion (27), and the two electromagnets can respectively control the extension and retraction of the first telescopic protrusion (26) and the second telescopic protrusion (27).

5. A circuit testing device for water meter processing according to claim 3, characterized in that: The driving assembly comprises a power rod (20) fixedly mounted on the center top of the transmission rod (17); the power rod (20) is driven to adjust vertically up and down by a second cylinder (28) mounted on the top of the vacuum box (2); a driven gear (21) is fixedly mounted on the outer wall of the power rod (20); a transmission gear (22) is rotatably mounted on the top of the vacuum box (2); and the transmission gear (22) is driven to rotate by a motor mounted on the top of the vacuum box (2); the driven gear (21) and the transmission gear (22) are always in meshing engagement.

6. A circuit testing device for water meter processing according to claim 5, characterized in that: The vacuum box (2) is externally connected to a vacuum pump and a vacuum gauge, and a high-precision pressure sensor is installed inside the vacuum box (2).

7. A circuit testing device for water meter processing according to claim 3, characterized in that: The clamp strip is composed of an elastic clamp strip (11) and two clamping blocks (10) fixed at both ends thereof. The clamping blocks (10) and the elastic clamp strip (11) are both provided with openings for inserting a circuit board (9). A latch (12) capable of clamping the circuit board (9) is rotatably mounted on the top of the clamping block (10). The elastic clamp strip (11) can change shape as the circuit board (9) changes.

8. A circuit testing device for water meter processing according to claim 7, characterized in that: The outer wall of the clamping block (10) is provided with a circular groove (24), the sliding pin (23) extends into the circular groove (24), the part of the sliding pin (23) extending into the circular groove (24) is a spherical body (25), and the radius of the spherical surface of the spherical body (25) is smaller than the radius of the spherical surface of the circular groove (24).

9. A circuit testing device for water meter processing according to any one of claims 1 to 8, characterized in that: When the circuit board (9) is in a straight state, the spring contact pin (8) will shrink towards the lifting plate (6) after contacting the circuit board (9).

10. A circuit testing device for water meter processing according to any one of claims 1 to 8, characterized in that: An observation glass plate (3) is installed on the outer wall of the vacuum box (2).

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