A circuit board vibration durability testing device

Abstract

The present invention relates to the technical field of circuit board testing, and discloses a circuit board vibration durability testing device, including: an operating table; a vibration test component, used for performing a vibration test on a circuit board; a hot and cold component, used for alternately blowing hot and cold air during the vibration test; and an anti-falling component, used for preventing the circuit board from falling off during vibration. Through the setting of the vibration test component, after the circuit board vibrates for a period of time, multiple probes can automatically descend to test the circuit board. After completing a cycle of vibration and testing, the circuit board enters the next cycle of vibration and testing. When the test results show that the circuit board fails, the staff can judge how many cycles of vibration the circuit board has completed in total, thereby obtaining the vibration duration experienced by the circuit board before the failure, further improving the accuracy of the vibration test data, and facilitating the analysis of the circuit board's anti-vibration durability.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board testing, and in particular to a circuit board vibration durability testing device. Background Art

[0002] Circuit boards need to undergo vibration testing during the production process. The main purpose of vibration testing circuit boards is to ensure their reliability and durability in actual use environments. Vibration testing can test the structural stability of circuit boards under vibration conditions and check whether solder joints and connections are loose or broken. It can also evaluate the tolerance of components on circuit boards in vibration environments to ensure that they do not fail or malfunction due to vibration, and to ensure that vibration does not affect the electrical performance of the circuit board, avoiding problems such as short circuits, open circuits, or performance degradation. In the prior art, when performing vibration testing on circuit boards, the circuit board is usually placed on a vibration test device, vibrated for a period of time, and then the circuit board is tested.

[0003] However, the prior art has the following problems:

[0004] 1. In the prior art, when performing vibration testing on a circuit board, after the vibration of the circuit board is completed, a worker needs to manually take the circuit board for subsequent testing, which results in low work efficiency.

[0005] 2. The prior art usually adopts the method of vibrating the circuit board for a period of time before testing. Since the vibration may last for a long time, when the circuit board fails, it is not easy to determine how long the circuit board vibrates before the failure occurs, and thus it is not easy to evaluate the vibration durability of the circuit board. Summary of the invention

[0006] The purpose of the present invention is to provide a circuit board vibration durability testing device in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A circuit board vibration durability test device provided by the present invention comprises: an operating table; a vibration test component for performing a vibration test on a circuit board; a hot and cold component for alternately blowing hot and cold air during the vibration test; an anti-falling component for preventing the circuit board from falling off during vibration; the vibration test component is arranged on the operating table, the hot and cold component is arranged on the operating table, the anti-falling component is arranged on the hot and cold component, a base and a tester are installed on the operating table; the vibration test component comprises a motor, the motor is installed on the operating table, a residual gear is connected to the output end of the motor, the residual gear is provided with teeth, a chassis is rotatably installed on the base, and the outer wall of the chassis is connected with a gear Ring, the gear ring is meshed with the teeth on the residual gear, a plurality of inclined blocks are installed on the chassis, an elastic rod is connected to the base, a vibration disk is connected to the elastic rod, three vibration blocks are slidably installed on the inner wall of the vibration disk, and the plurality of inclined blocks contact the three vibration blocks during movement, a short shaft is connected to the vibration disk, a mounting disk is connected to the top of the short shaft, a clamp is installed on the mounting disk, a plurality of clamps are installed on the clamp through a spring, a rebound frame is installed on the operating table, a mounting arm is rotatably connected to the rebound frame, two slot rods are slidably installed on the mounting arm, two probes are slidably installed on the slot rod, and the four probes are connected to the tester through wires.

[0009] Preferably, the bottom of the residual gear is connected to an arc surface block, the rebound frame is connected to a roller, and the arc surface block contacts the roller during movement.

[0010] Preferably, the cross-sectional height of one end of the inclined surface block close to the elastic rod is smaller than the cross-sectional height of the other end away from the elastic rod, the outer wall of the short shaft is rotatably connected to an adjusting disk, and the outer wall of the adjusting disk is connected to a lever.

[0011] Preferably, three arc grooves are provided on the adjusting disk, and the tops of the three vibration blocks are slidably connected to the three arc grooves on the adjusting disk through rollers respectively.

[0012] Preferably, the hot and cold components include a bevel shaft with an annular bevel groove formed on the bevel shaft, two slide rail frames are installed on the operating table, a ball slide is slidably installed between the two slide rail frames, and the inner wall of the ball slide is slidably connected to the annular bevel groove of the bevel shaft through balls.

[0013] Preferably, two airbags are installed on the operating table, and pressure blocks are respectively connected to the two ends of the ball slide. The two pressure blocks are respectively in contact with the two airbags. The airbags are connected with air pipes. Two fixed tubes are installed on the operating table, and the ends of the two air pipes away from the airbags are respectively connected to the two fixed tubes.

[0014] Preferably, the upper sliding connection of the fixed tube is connected to a movable tube, the outer wall of the movable tube is connected to a counterweight block, the top of the movable tube is connected to a blow hood, the two blow hoods are respectively located above both sides of the clamp, and one of the blow hoods is equipped with a heating wire.

[0015] Preferably, the outer wall of the chassis is connected with a semicircular ring, the outer wall of the movable tube is connected with a round rod, and the semicircular ring contacts with two round rods in sequence during the movement.

[0016] Preferably, the anti-falling assembly includes a sliding seat, which is installed on two slide rail frames. A sliding rod is slidably installed on the sliding seat, one end of the sliding rod is connected to a baffle, and two connecting rods are hinged on the sliding rod, and the ends of the two connecting rods away from the sliding rod are hinged to the mounting arm.

[0017] The beneficial effects are:

[0018] 1. The circuit board vibration durability test equipment, through the setting of the vibration test component, enables the circuit board to vibrate for a period of time, and then multiple probes can automatically descend to test the circuit board. After completing one cycle of vibration and testing, the circuit board enters the next cycle of vibration and testing. When the test results show that the circuit board has failed, the staff can judge how many cycles of vibration the circuit board has completed in total, and thus obtain the vibration duration experienced by the circuit board before the failure, further improving the accuracy of the vibration test data and facilitating the analysis of the circuit board's anti-vibration durability; through the cooperation of three vibration blocks, multiple inclined blocks and an adjustment disk, the effect of adjusting the vibration amplitude is achieved, and the staff can adjust the vibration amplitude according to different test requirements, thereby improving the applicability of the vibration test component.

[0019] 2. The circuit board vibration durability test equipment, through the setting of hot and cold components, allows the circuit board to be alternately disturbed by cold and hot air during the vibration process, which more realistically simulates the actual working environment of the circuit board. The alternating interference of cold and hot can accelerate the thermal expansion and contraction frequency of components on the circuit board, thereby being able to test the circuit board's resistance to temperature and vibration at the same time, further optimizing the test data of the circuit board's durability.

[0020] 3. The circuit board vibration durability test equipment, through the setting of the anti-falling component, enables the baffle to play a certain protective role on the circuit board in the fixture to prevent the circuit board from falling off during the vibration test. The baffle can also avoid the movement trajectory of the four probes when they move downward to avoid interference with the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the vibration test assembly of the present invention;

[0024] Figure 3 It is a schematic diagram of the residual gear structure of the present invention;

[0025] Figure 4 is a schematic diagram of the probe structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the elastic rod structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the vibration plate of the present invention;

[0028] Figure 7 It is a schematic diagram of the chassis structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the adjustment disk of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the hot and cold components of the present invention;

[0031] Fig.10 It is a schematic diagram of the semicircular ring structure of the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of the anti-falling component of the present invention.

[0033] The reference numerals are as follows: 1. operating table; 2. base; 3. vibration test assembly; 31. motor; 32. residual gear; 33. chassis; 331. inclined block; 34. gear ring; 35. elastic rod; 36. vibration plate; 37. vibration block; 38. short shaft; 39. adjustment plate; 310. lever; 311. mounting plate; 312. fixture; 313. arc block; 314. roller; 315. rebound frame; 316. mounting arm; 3 17. Slot rod; 318. Probe; 4. Hot and cold components; 41. Bevel slot shaft; 42. Slide rail frame; 43. Ball slide frame; 44. Pressure block; 45. Air bag; 46. Air pipe; 47. Fixed pipe; 48. Movable pipe; 49. Counterweight; 410. Blowing hood; 411. Heating wire; 412. Semicircular ring; 413. Round rod; 5. Anti-falling component; 51. Slide seat; 52. Sliding rod; 53. Baffle; 54. Connecting rod; 6. Tester. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0035] Example 1

[0036] See also Figure 1 - Figure 8A circuit board vibration durability test device comprises: an operating table 1, on which a base 2 and a tester 6 are installed; a vibration test assembly 3, used for performing a vibration test on a circuit board, the vibration test assembly 3 is arranged on the operating table 1, and the vibration test assembly 3 comprises a motor 31, the motor 31 is arranged on the operating table 1, the output end of the motor 31 is connected to a residual gear 32, the residual gear 32 is provided with teeth, a chassis 33 is rotatably installed on the base 2, the outer wall of the chassis 33 is connected to a gear ring 34, the gear ring 34 is meshed with the teeth on the residual gear 32, when the teeth on the residual gear 32 are meshed with the gear ring 34, the residual gear 32 drives the gear ring 34 to rotate, when the teeth on the residual gear 32 are not meshed with the gear ring 34, the gear ring 34 does not rotate, and the chassis 33 A plurality of inclined plane blocks 331 are installed on the base 2, an elastic rod 35 is connected to the base 2, a vibration plate 36 is connected to the elastic rod 35, and three vibration blocks 37 are slidably installed on the inner wall of the vibration plate 36. The plurality of inclined plane blocks 331 are in contact with the three vibration blocks 37 during movement, and the plurality of inclined plane blocks 331 are driven to rotate when the base 33 rotates. Since the elastic rod 35 on the base 2 applies a downward pulling force to the vibration plate 36, the three vibration blocks 37 on the vibration plate 36 apply downward pressure to the base 33 and the plurality of inclined plane blocks 331. When the inclined plane block 331 contacts the vibration block 37, the vibration block 37 moves upward along the inclined surface of the inclined plane block 331. When the inclined plane block 331 does not contact the vibration block 37, the vibration block 37 is reset downward, so that the plurality of inclined plane blocks 331 rotate. When the gear 32 is in motion, the three vibration blocks 37 can drive the vibration plate 36 to continuously vibrate up and down, thereby achieving a vibration effect. The vibration plate 36 is connected to a short shaft 38, and the top of the short shaft 38 is connected to a mounting plate 311, and a clamp 312 is installed on the mounting plate 311. The staff manually turns the mounting arm 316 to place the circuit board in the clamp 312 on the mounting plate 311. The multiple clamps and springs on the clamp 312 can exert a certain elastic force on the edge of the circuit board to achieve a clamping effect. The clamp 312 is equipped with multiple clamps through springs, and a rebound frame 315 is installed on the operating table 1. The bottom of the residual gear 32 is connected to an arc block 313, and the rebound frame 315 is connected to a roller 314. The arc block 313 is connected to the roller 314 during the movement. 4, the springback frame 315 is rotatably connected with the mounting arm 316, when the teeth on the residual gear 32 are not meshed with the gear ring 34, the arc block 313 contacts the roller 314, the roller 314 slides along the arc surface of the arc block 313 and moves upward due to the reverse thrust of the arc block 313, because the springback frame 315 can be extended and retracted, so that when the roller 314 moves upward, the springback frame 315 is driven to retract downward, and the springback frame 315 drives the mounting arm 316 to move downward, and two slot rods 317 are slidably mounted on the mounting arm 316, and two probes 318 are slidably mounted on the slot rod 317, and the four probes 318 are connected to the tester 6 through wires, and after the probes 318 contact the circuit board, the circuit board is energized and tested by cooperating with the tester 6,The tester 6 displays the test results on the display of the tester 6. Since the two slot rods 317 can slide on the mounting arm 316 and the four probes 318 can slide on the two slot rods 317, the staff can manually adjust the positions of the four probes 318 to match the test points of the circuit board to be tested. The staff can also increase or decrease the number of probes 318 according to actual needs to meet different test needs. When the residual gear 32 drives the gear ring 34 to rotate, the circuit board vibrates. When the residual gear 32 does not drive the gear ring 34 to rotate, the four probes 318 move downward to power on the circuit board for testing. After the tester 6 obtains the test data, the four probes The pin 318 is reset, and the residual gear 32 meshes with the gear ring 34 again, so that the circuit board vibrates again. The circuit board can be tested every time it vibrates for a period of time, achieving the effect of automatic testing. When the test data shows that the circuit board fails, it can be judged that the circuit board failed during the last vibration process, so that the approximate duration of the circuit board vibration before the failure can be judged, and the vibration resistance durability of the circuit board can be obtained; the cross-sectional height of the end of the inclined plane block 331 close to the elastic rod 35 is less than the cross-sectional height of the end away from the elastic rod 35, the outer wall of the short shaft 38 is rotatably connected to the adjusting disk 39, the outer wall of the adjusting disk 39 is connected to the lever 310, and the adjusting disk Three arc grooves are arranged on 39, and the tops of the three vibration blocks 37 are respectively connected to the three arc grooves on the adjustment disk 39 through rollers for sliding. When the vibration block 37 moves toward the short axis 38, the contact surface height between the vibration block 37 and the inclined surface block 331 decreases. When the vibration block 37 moves away from the short axis 38, the contact surface height between the vibration block 37 and the inclined surface block 331 increases. The height of the contact surface between the vibration block 37 and the inclined surface block 331 determines the vibration amplitude of the vibration block 37. By adjusting the position of the vibration block 37, the effect of adjusting the vibration amplitude can be achieved. By setting the vibration test component 3, after the circuit board vibrates for a period of time, the multiple probes 31 8 can automatically descend to test the circuit board. After completing one cycle of vibration and testing, the circuit board enters the next cycle of vibration and testing. When the test results show that the circuit board has failed, the staff can determine how many cycles of vibration the circuit board has completed in total, thereby obtaining the vibration duration experienced by the circuit board before the failure, further improving the accuracy of the vibration test data and facilitating the analysis of the vibration resistance and durability of the circuit board; through the cooperation of three vibration blocks 37, multiple inclined blocks 331 and adjustment disk 39, the effect of adjusting the vibration amplitude is achieved. The staff can adjust the vibration amplitude according to different test requirements, which improves the applicability of the vibration test assembly 3. ,

[0037] For further information, see Fig. 9 - Fig.10The hot and cold assembly 4 is used to alternately blow hot and cold air during the vibration test. The hot and cold assembly 4 is arranged on the operating table 1. The hot and cold assembly 4 includes an inclined slot shaft 41. An annular inclined slot is opened on the inclined slot shaft 41. Two slide rail frames 42 are installed on the operating table 1. A ball slide 43 is slidably installed between the two slide rail frames 42. The inner wall of the ball slide 43 is slidably connected with the annular inclined slot of the inclined slot shaft 41 through a ball. When the inclined slot shaft 41 rotates, the ball slide 43 is driven by the annular inclined slot to slide back and forth on the two slide rail frames 42. Two air bags 45 are installed on the operating table 1. The two ends of the ball slide 43 are respectively connected to pressure blocks 44. The two pressure blocks 44 are divided into The two air bags 45 are not in contact with each other, and the air bags 45 are connected with an air pipe 46. Two fixed pipes 47 are installed on the operating table 1. The ends of the two air pipes 46 away from the air bags 45 are respectively connected with the two fixed pipes 47. The upper sliding of the fixed pipe 47 is connected with a movable pipe 48. The outer wall of the movable pipe 48 is connected with a counterweight 49. The top of the movable pipe 48 is connected with a blow hood 410. The two blow hoods 410 are respectively located above the two sides of the clamp 312. A heating wire 411 is installed on one of the blow hoods 410. The outer wall of the chassis 33 is connected with a semicircular ring 412. Both ends of the semicircular ring 412 are provided with inclined surfaces. The outer wall of the movable pipe 48 is connected with a round rod 4 13. The semicircular ring 412 contacts the two round rods 413 in sequence during the movement. When the semicircular ring 412 contacts the round rod 413, the round rod 413 drives the movable tube 48 to move upward, and the movable tube 48 drives the blowing hood 410 to move upward. When the round rod 413 is not in contact with the semicircular ring 412, the movable tube 48 is reset downward by the gravity of the counterweight block 49, and the blowing hood 410 is reset downward accordingly. Since only one round rod 413 contacts the semicircular ring 412 at the same time, the two blowing hoods 410 can move upward alternately. When the blowing hood 410 moves upward, it can blow air onto the circuit board in the fixture 312. Since one of the blowing hoods 410 is equipped with a heating wire 411, one of the blowing hoods 410 blows out hot air, so that the circuit board in the fixture 312 can be alternately blown by hot air and cold air, so that the circuit board is subjected to certain hot and cold temperature interference; through the setting of the hot and cold component 4, the circuit board can also be alternately disturbed by cold air and hot air during the vibration process, which more realistically simulates the actual working environment of the circuit board. The alternating hot and cold interference can accelerate the thermal expansion and contraction frequency of the components on the circuit board, so that the circuit board's resistance to temperature and vibration can be tested at the same time, further optimizing the test data of the circuit board's durability.

[0038] Further, see Fig.11The anti-falling component 5 is used to prevent the circuit board from falling off during vibration. The anti-falling component 5 is arranged on the hot and cold component 4. The anti-falling component 5 includes a slide seat 51, which is installed on two slide rail frames 42. A sliding rod 52 is slidably installed on the slide seat 51. One end of the sliding rod 52 is connected to a baffle 53. The baffle 53 can block a part of the circuit board in the clamp 312. When the circuit board is released from the clamp 312 during vibration and pops out, the baffle 53 can block the circuit board to prevent the circuit board from falling and being damaged. Two connecting rods 54 are hinged on the sliding rod 52. One end of the two connecting rods 54 away from the sliding rod 52 is hinged to the mounting arm 316. When the mounting arm When 316 moves downward, the mounting arm 316 drives the sliding rod 52 to slide on the slide seat 51 in the direction away from the fixture 312 through the two connecting rods 54. When the sliding rod 52 moves, it drives the baffle 53 to move synchronously. After the baffle 53 slides in the direction away from the fixture 312, it can avoid the baffle 53 blocking the movement path of the four probes 318; through the setting of the anti-falling component 5, the baffle 53 can play a certain protective role on the circuit board in the fixture 312, avoiding the circuit board from falling off during the vibration test. The baffle 53 can also avoid the movement trajectory of the probes 318 when the four probes 318 move downward, avoiding interference with the test process.

[0039] With the above structure, the working principle of this case is that the mounting arm 316 can rotate, and the staff manually turns the mounting arm 316 to place the circuit board in the clamp 312 on the mounting plate 311. The multiple clamps and springs on the clamp 312 can exert a certain elastic force on the edge of the circuit board to achieve a clamping effect. After starting the motor 31, the motor 31 drives the residual gear 32 to rotate. When the teeth on the residual gear 32 are engaged with the gear ring 34, the residual gear 32 drives the gear ring 34 to rotate. When the teeth on the residual gear 32 are not engaged with the gear ring 34, the gear ring 34 does not rotate. When the gear ring 34 rotates, it drives the chassis 33 to rotate. When the chassis 33 rotates, it drives the multiple inclined blocks 331 to rotate. Since the elastic rod 35 on the base 2 exerts a downward force on the vibration plate 36 The pulling force causes the three vibration blocks 37 on the vibration disk 36 to apply downward pressure to the chassis 33 and the multiple inclined blocks 331. When the inclined block 331 contacts the vibration block 37, the vibration block 37 moves upward along the inclined surface of the inclined block 331. When the inclined block 331 does not contact the vibration block 37, the vibration block 37 resets downward, so that when the multiple inclined blocks 331 rotate, the three vibration blocks 37 can drive the vibration disk 36 to continuously vibrate up and down, thereby achieving a vibration effect. The vibration disk 36 drives the mounting plate 311 and the clamp 312 to vibrate through the short shaft 38. The clamp 312 and the mounting plate 311 transmit the vibration to the circuit board, so that the circuit board can continue to vibrate for a period of time. While the teeth on the residual gear 32 are not engaged with the gear ring 34, the arc The surface block 313 contacts the roller 314, and the roller 314 slides along the arc surface of the arc surface block 313 and moves upward due to the reverse thrust of the arc surface block 313. Since the rebound frame 315 can be retracted, the roller 314 drives the rebound frame 315 to shrink downward when moving upward, and the rebound frame 315 drives the installation arm 316 to move downward. The installation arm 316 drives the four probes 318 to move downward through the two slot rods 317, so that the four probes 318 contact the circuit board. After the probes 318 contact the circuit board, they are powered on and tested by the tester 6. The tester 6 displays the test results on the display of the tester 6. When the arc surface block 313 is about to lose contact with the roller 314, the roller 314 is rebounded by the rebound frame 315. The springback frame 315 is reset by elastic force, and the mounting arm 316 is reset at the same time; when the residual gear 32 drives the gear ring 34 to rotate, the circuit board vibrates, and when the residual gear 32 does not drive the gear ring 34 to rotate, the four probes 318 move downward to conduct a power-on test on the circuit board. After the tester 6 obtains the test data, the four probes 318 are reset, and the residual gear 32 meshes with the gear ring 34 again, so that the circuit board vibrates again. The circuit board can be tested once after vibrating for a period of time, achieving the effect of automatic testing. When the test data shows that the circuit board fails, it can be judged that the circuit board failed during the last vibration process, so that the approximate duration of the circuit board vibration before the failure can be judged, and the vibration resistance durability of the circuit board can be obtained;Since the two slot rods 317 can slide on the mounting arms 316 and the four probes 318 can slide on the two slot rods 317, the staff can manually adjust the positions of the four probes 318 to match the test points of the circuit board to be tested. The staff can also increase or decrease the number of probes 318 according to actual needs to meet different test needs. When the staff rotates the lever 310, the lever 310 drives the adjustment disk 39 to rotate. When the adjustment disk 39 rotates, the three vibration blocks 37 are driven to move synchronously in the direction close to the short axis 38 through the three arc grooves. Similarly, when the adjustment disk 39 rotates in the opposite direction, the three vibration blocks 37 move synchronously in the direction away from the short axis 38. Since the cross-sectional height of the end of the inclined surface block 331 close to the elastic rod 35 is less than the cross-sectional height of the end away from the elastic rod 35, the height of the inclined surface block 331 gradually decreases from the outside to the inside. When the vibration block 37 moves close to the short axis 38, the contact surface height of the vibration block 37 and the inclined surface block 331 decreases. When the vibration block 37 moves away from the short axis 38, the contact surface height of the vibration block 37 and the inclined surface block 331 decreases. , the height of the contact surface between the vibration block 37 and the inclined surface block 331 is increased, and the height of the contact surface between the vibration block 37 and the inclined surface block 331 determines the vibration amplitude of the vibration block 37. The effect of adjusting the vibration amplitude can be achieved by adjusting the position of the vibration block 37; through the setting of the vibration test assembly 3, after the circuit board vibrates for a period of time, multiple probes 318 can automatically descend to test the circuit board. After completing a cycle of vibration and testing, the circuit board enters the next cycle of vibration and testing. When the test results show that the circuit board fails, the staff can judge how many cycles of vibration the circuit board has completed in total, so as to obtain the vibration duration experienced by the circuit board before the failure, further improving the accuracy of the vibration test data, and facilitating the analysis of the anti-vibration durability of the circuit board; through the cooperation of three vibration blocks 37, multiple inclined surface blocks 331 and the adjustment disk 39, the effect of adjusting the vibration amplitude is achieved. The staff can adjust the vibration amplitude according to different test requirements, which improves the applicability of the vibration test assembly 3. ;

[0040] When the residual gear 32 rotates, the residual gear 32 drives the inclined groove shaft 41 to rotate. When the inclined groove shaft 41 rotates, it drives the ball slide 43 to slide up and down on the two slide rail frames 42 through the annular inclined groove. The ball slide 43 drives the two pressing blocks 44 to move up and down. When the two pressing blocks 44 move downward, they squeeze the two air bags 45. After being squeezed, the air bags 45 transport the air to the fixed pipe 47 through the air pipe 46. The air in the fixed pipe 47 is transported to the blowing hood 410 through the movable pipe 48. The two blowing hoods 410 are respectively from both sides of the circuit board to the clamp 31. 2 direction of blowing air; when the chassis 33 rotates, the semicircular ring 412 is driven to rotate, and both ends of the semicircular ring 412 are provided with inclined surfaces. When the semicircular ring 412 contacts one of the round rods 413 during the rotation process, the round rod 413 slides along the inclined surface of the semicircular ring 412 to the top surface of the semicircular ring 412. During this process, the round rod 413 moves upward for a distance, so that when the semicircular ring 412 contacts the round rod 413, the round rod 413 drives the movable tube 48 to move upward, and the movable tube 48 drives the blowing hood 410 to move upward. When the round rod 413 is not in contact with the semicircular ring 412 When the movable tube 48 is reset downward by the gravity of the counterweight 49, the blowing hood 410 is reset downward accordingly. Since only one round rod 413 is in contact with the semicircular ring 412 at the same time, the two blowing hoods 410 can move upward alternately. When the blowing hood 410 moves upward, the wind can be blown onto the circuit board in the fixture 312. When the blowing hood 410 is reset downward, the contact area between the wind blown out of the blowing hood 410 and the circuit board is greatly reduced due to the shielding of the fixture 312. Since one of the blowing hoods 410 is equipped with a heating wire 411, One of the blowing hoods 410 blows out hot air, so that the circuit board in the fixture 312 can be alternately blown with hot air and cold air, so that the circuit board is subjected to certain hot and cold temperature interferences; through the setting of the hot and cold component 4, the circuit board can be alternately disturbed by cold air and hot air during the vibration process, which more realistically simulates the actual working environment of the circuit board. The alternating hot and cold interference can accelerate the thermal expansion and contraction frequency of the components on the circuit board, so that the circuit board's resistance to temperature and vibration can be tested at the same time, further optimizing the test data of the circuit board's durability.

[0041] When the mounting arm 316 moves downward, the mounting arm 316 drives the sliding rod 52 to slide on the slide seat 51 in a direction away from the fixture 312 through the two connecting rods 54, and the sliding rod 52 drives the baffle 53 to move synchronously when moving. After the baffle 53 slides in the direction away from the fixture 312, it can prevent the baffle 53 from blocking the movement path of the four probes 318. When the mounting arm 316 moves upward, the mounting arm 316 drives the sliding rod 52 to reset through the two connecting rods 54, and the baffle 53 is reset accordingly. Through the setting of the anti-falling component 5, the baffle 53 can play a certain protective role on the circuit board in the fixture 312, preventing the circuit board from falling off during the vibration test. The baffle 53 can also avoid the movement trajectory of the probes 318 when the four probes 318 move downward, so as to avoid interference with the test process.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A circuit board vibration durability testing device, characterized in that: include: Operation table (1); A vibration test assembly (3), used for performing a vibration test on a circuit board; A hot and cold assembly (4) for alternately blowing hot and cold air during vibration testing; An anti-falling component (5) is used to prevent the circuit board from falling off when vibrating; The vibration test component (3) is arranged on the operating table (1), the hot and cold component (4) is arranged on the operating table (1), the anti-falling component (5) is arranged on the hot and cold component (4), and a base (2) and a tester (6) are installed on the operating table (1); The vibration test assembly (3) comprises a motor (31), the motor (31) being mounted on an operating table (1), the output end of the motor (31) being connected to a residual gear (32), the residual gear (32) being provided with teeth, a chassis (33) being rotatably mounted on the base (2), the outer wall of the chassis (33) being connected to a toothed ring (34), the toothed ring (34) being meshed with the teeth on the residual gear (32), a plurality of inclined plane blocks (331) being mounted on the chassis (33), an elastic rod (35) being connected to the base (2), a vibration disk (36) being connected to the elastic rod (35), three vibration blocks (37) being slidably mounted on the inner wall of the vibration disk (36), and a plurality of the inclined plane blocks (331) being mounted on the inner wall of the vibration disk (36). The inclined block (331) contacts three vibration blocks (37) when in motion; the vibration disk (36) is connected to a short shaft (38); the top of the short shaft (38) is connected to a mounting disk (311); a clamp (312) is mounted on the mounting disk (311); a plurality of clamps are mounted on the clamp (312) via a spring; a rebound frame (315) is mounted on the operating table (1); a mounting arm (316) is rotatably connected to the rebound frame (315); two slot rods (317) are slidably mounted on the mounting arm (316); two probes (318) are slidably mounted on the slot rod (317); the four probes (318) are connected to the tester (6) via wires; The hot and cold assembly (4) comprises an inclined groove shaft (41), an annular inclined groove is formed on the inclined groove shaft (41), two slide rail frames (42) are installed on the operating table (1), a ball bearing slide (43) is slidably installed between the two slide rail frames (42), and the inner wall of the ball bearing slide (43) is slidably connected to the annular inclined groove of the inclined groove shaft (41) through balls; The anti-falling component (5) comprises a sliding seat (51), wherein the sliding seat (51) is mounted on two slide rail frames (42), a sliding rod (52) is slidably mounted on the sliding seat (51), one end of the sliding rod (52) is connected to a baffle (53), and two connecting rods (54) are hinged on the sliding rod (52), and the ends of the two connecting rods (54) away from the sliding rod (52) are hinged to the mounting arm (316).

2. A circuit board vibration durability testing device according to claim 1, characterized in that: The bottom of the residual gear (32) is connected to a curved surface block (313), the rebound frame (315) is connected to a roller (314), and the curved surface block (313) is in contact with the roller (314) during the movement.

3. A circuit board vibration durability testing device according to claim 2, characterized in that: The cross-sectional height of one end of the inclined surface block (331) close to the elastic rod (35) is smaller than the cross-sectional height of the other end away from the elastic rod (35); the outer wall of the short shaft (38) is rotatably connected to an adjusting disk (39); and the outer wall of the adjusting disk (39) is connected to a lever (310).

4. A circuit board vibration durability testing device according to claim 3, characterized in that: The adjusting disk (39) is provided with three arc grooves, and the tops of the three vibration blocks (37) are respectively slidably connected to the three arc grooves on the adjusting disk (39) through rollers.

5. A circuit board vibration durability testing device according to claim 4, characterized in that: Two air bags (45) are installed on the operating table (1), and pressure blocks (44) are respectively connected to the two ends of the ball bearing slide (43), and the two pressure blocks (44) are respectively in contact with the two air bags (45). The air bags (45) are connected to air pipes (46), and two fixed pipes (47) are installed on the operating table (1), and the ends of the two air pipes (46) away from the air bags (45) are respectively connected to the two fixed pipes (47).

6. A circuit board vibration durability testing device according to claim 5, characterized in that: The upper part of the fixed tube (47) is slidably connected to a movable tube (48), the outer wall of the movable tube (48) is connected to a counterweight block (49), the top of the movable tube (48) is connected to a blowing hood (410), and the two blowing hoods (410) are respectively located above the two sides of the clamp (312), and a heating wire (411) is installed on one of the blowing hoods (410).

7. A circuit board vibration durability testing device according to claim 6, characterized in that: The outer wall of the chassis (33) is connected with a semicircular ring (412), and the outer wall of the movable tube (48) is connected with a round rod (413). The semicircular ring (412) contacts the two round rods (413) in sequence during the movement.

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