Withstand voltage test clamp for circuit board

Abstract

The utility model belongs to the field of test fixtures, and particularly relates to a withstand voltage test fixture for a circuit board, which comprises a fixture seat, the upper end of the fixture seat is connected with a movable seat in a sliding manner, the lower end of the fixture seat is fixedly connected with two symmetrically distributed mounting racks, the interiors of the two mounting racks are jointly provided with a positive and negative screw rod through a bearing, and the positive and negative screw rod is fixedly connected with the movable seat. And the lower end of the moving seat is fixedly connected with a threaded seat. The rotary knob, the square rod nail, the tooth groove and other structures are additionally arranged on the positive and negative screw rod, the positive and negative screw rod can be driven to rotate through the rotary knob and the square rod nail in the using process, and the position of the movable base can be adjusted through threaded fit between the positive and negative screw rod and the threaded base in the rotating process; after adjustment is completed, a tooth groove in the outer side of the rotary knob can be driven by the elastic force of a second spring to slide to the outer side of a tooth strip, the rotary knob and the positive and negative screw rod can be locked, and therefore the adjusted movable base can be more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a withstand voltage test fixture for a circuit board. Background Art

[0002] The withstand voltage test of a circuit board (also known as a high voltage test or an insulation withstand voltage test) is an important link for detecting its insulation performance and electrical safety. It is mainly used to verify the insulation strength of the circuit board under different voltages to ensure that it will not break down or leak electricity during normal or abnormal operation. During the process of performing the withstand voltage test on the circuit board, in order to improve the stability of the circuit board, it is necessary to clamp it with a fixture. However, in the existing technology, in order to improve the diversity of clamping, the range of the clamping seat can be adjusted by a positive and negative screw rod. However, the screw rod adjustment method is prone to cause clamping looseness during vibration, affecting the clamping stability. Moreover, in the clamping method through screw thread cooperation, the screw rod needs to be rotated repeatedly, further causing screw thread wear and resulting in more unstable clamping. Therefore, it is necessary to improve the existing technology. Content of the Utility Model

[0003] The purpose of the utility model is to provide a withstand voltage test fixture for a circuit board, which solves the problem that the clamping method through screw thread cooperation is prone to cause unstable clamping.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A withstand voltage test fixture for a circuit board, including a fixture seat, a moving seat is slidably connected to the upper end of the fixture seat, two symmetrically distributed mounting frames are fixedly connected to the lower end of the fixture seat, a positive and negative screw rod is installed inside the two mounting frames through bearings together, a threaded seat is fixedly connected to the lower end of the moving seat, a knob is slidably connected to the left part of the outer side of the positive and negative screw rod, a locking mechanism is arranged inside the positive and negative screw rod, a support bar is fixedly connected to the middle of the upper end of the fixture seat, three uniformly distributed connecting rods are slidably connected inside the moving seat, a clamping bar is fixedly connected to one end of the connecting rod far away from the moving seat, a rubber strip is fixedly connected to the outer side of the clamping bar, a pull rod frame is fixedly connected to one end of the connecting rod far away from the clamping bar, and a first spring is arranged on the outer side of the connecting rod.

[0005] Preferably, the threaded seat is slidably connected to the fixture seat, the threaded seat is threadedly connected to the positive and negative screw rod, a support seat is fixedly connected to the middle of the lower end of the fixture seat, and the support seat is connected to the middle of the positive and negative screw rod through a bearing. The support seat can support the positive and negative screw rod, making the rotation of the positive and negative screw rod more stable.

[0006] Preferably, the rubber strip is slidably connected to the support strip, the moving seat is slidably connected to the support strip, and the clamping strip is slidably connected to the support strip. The rubber strip can increase the friction between the clamping strip and the circuit board, thereby improving the clamping stability.

[0007] Preferably, one end of the first spring is fixedly connected to the moving seat, and the other end of the first spring is fixedly connected to the clamping strip. The first spring can support the clamping strip through its elastic force.

[0008] Preferably, the locking mechanism includes a fixed column. The middle part of the left end of the fixture seat is fixedly connected to the fixed column. A toothed bar is fixedly connected to the lower end of the fixed column. A plurality of annularly distributed tooth grooves are formed on the outer side of the knob. A square rod nail is fixedly connected to the inner wall of the knob. A square hole plate is fixedly connected to the inner part of the left end of the positive and negative screw rod. A second spring is arranged on the outer side of the square rod of the square rod nail. The knob can drive the square rod nail to move.

[0009] Preferably, the square rod of the square rod nail is slidably connected to the square hole plate, the square hole plate is in sliding contact with the knob, and the toothed bar is slidably connected to the tooth groove. The toothed bar can limit the position of the knob through the tooth groove.

[0010] Preferably, one end of the second spring is fixedly connected to the square hole plate, and the other end of the second spring is fixedly connected to the square rod nail. The second spring can drive the square rod nail to automatically reset through its elastic force.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By adding structures such as a knob, a square rod nail, and a tooth groove to the positive and negative screw rod, the present utility model can drive the positive and negative screw rod to rotate through the knob and the square rod nail during use. During the rotation of the positive and negative screw rod, the position of the moving seat can be adjusted through the thread fit with the thread seat. After the adjustment is completed, the tooth groove on the outer side of the knob can be driven to slide to the outer side of the toothed bar through the elastic force of the second spring, so as to lock the knob and the positive and negative screw rod, thereby making the adjusted moving seat more stable.

[0013] 2. By adding structures such as a clamping strip, a connecting rod, and a pull rod frame to the moving seat, after adjusting the position of the moving seat, the rubber strip on the outer side of the clamping strip can be driven to press against the outer side of the circuit board through the elastic force of the first spring, so as to stably clamp the circuit board. And during the detection of circuit boards of the same model, only by pulling the pull rod frame to drive the clamping strip to move, the circuit board can be conveniently clamped and disassembled, which can further improve the detection efficiency. Description of the Drawings

[0014] Figure 1The three-dimensional view of the overall structure of the present utility model Figure 1 ;

[0015] Figure 2 The three-dimensional view of the overall structure of the present utility model Figure 2 ;

[0016] Figure 3 For the present utility model Figure 1 The three-dimensional enlarged view of the moving seat;

[0017] Figure 4 For the present utility model Figure 1 The front view sectional enlarged view of the partial structure;

[0018] Figure 5 For the present utility model Figure 1 The three-dimensional enlarged view of the knob;

[0019] Figure 6 For the present utility model Figure 1 The enlarged view of the structure of part A.

[0020] In the figure: 1. Fixture seat; 2. Moving seat; 3. Mounting frame; 4. Right and left screw; 5. Threaded seat; 6. Knob; 7. Locking mechanism; 8. Support seat; 9. Support bar; 10. Connecting rod; 11. Clamping bar; 12. Rubber strip; 13. Tie rod frame; 14. Spring 1; 71. Fixed column; 72. Tooth bar; 73. Tooth groove; 74. Square rod nail; 75. Square hole plate; 76. Spring 2. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6, A voltage withstand test fixture for a circuit board, comprising a fixture base 1. A moving seat 2 is slidably connected to the upper end of the fixture base 1. Two symmetrically distributed mounting frames 3 are fixedly connected to the lower end of the fixture base 1. A forward and reverse screw rod 4 is installed inside the two mounting frames 3 through bearings. A threaded seat 5 is fixedly connected to the lower end of the moving seat 2. A knob 6 is slidably connected to the left part of the outer side of the forward and reverse screw rod 4. A locking mechanism 7 is arranged inside the forward and reverse screw rod 4. A support bar 9 is fixedly connected to the middle of the upper end of the fixture base 1. Three uniformly distributed connecting rods 10 are slidably connected inside the moving seat 2. One end of the connecting rod 10 far from the moving seat 2 is fixedly connected to a clamping bar 11. A rubber strip 12 is fixedly connected to the outer side of the clamping bar 11. One end of the connecting rod 10 far from the clamping bar 11 is fixedly connected to a pull rod frame 13. A first spring 14 is arranged on the outer side of the connecting rod 10.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 , The threaded seat 5 is slidably connected to the fixture base 1. The threaded seat 5 is threadedly connected to the forward and reverse screw rod 4. A support seat 8 is fixedly connected to the middle of the lower end of the fixture base 1. The support seat 8 is connected to the middle of the forward and reverse screw rod 4 through a bearing. The support seat 8 can support the forward and reverse screw rod 4, making the rotation of the forward and reverse screw rod 4 more stable. The rubber strip 12 is slidably connected to the support bar 9. The moving seat 2 is slidably connected to the support bar 9. The clamping bar 11 is slidably connected to the support bar 9. The rubber strip 12 can increase the friction between the clamping bar 11 and the circuit board, improving the stability of clamping. One end of the first spring 14 is fixedly connected to the moving seat 2, and the other end of the first spring 14 is fixedly connected to the clamping bar 11. The first spring 14 can support the clamping bar 11 through elastic force.

[0024] Please refer to Figure 1 , Figure 4 , Figure 5 , The locking mechanism 7 includes a fixed column 71. The fixed column 71 is fixedly connected to the middle of the left end of the fixture base 1. A toothed bar 72 is fixedly connected to the lower end of the fixed column 71. A plurality of annularly distributed tooth grooves 73 are opened on the outer side of the knob 6. A square rod nail 74 is fixedly connected to the inner wall of the knob 6. A square hole plate 75 is fixedly connected to the left end inside the forward and reverse screw rod 4. A second spring 76 is arranged on the outer side of the square rod of the square rod nail 74. The knob 6 can drive the square rod nail 74 to move. The square rod of the square rod nail 74 is slidably connected to the square hole plate 75. The square hole plate 75 is in sliding contact with the knob 6. The toothed bar 72 is slidably connected to the tooth grooves 73. The toothed bar 72 can limit the knob 6 through the tooth grooves 73. One end of the second spring 76 is fixedly connected to the square hole plate 75, and the other end of the second spring 76 is fixedly connected to the square rod nail 74. The second spring 76 can drive the square rod nail 74 to automatically reset through elastic force.

[0025] The specific implementation process of the present utility model is as follows: When in use, pull the knob 6, the knob 6 drives the square rod nail 74 to move and compresses the second spring 76. When the tooth groove 73 on the outer side of the knob 6 disengages from the tooth bar 72, the limit on the knob 6 can be released. Then rotate the knob 6, and the knob 6 drives the positive and negative screw rod 4 to rotate through the square rod nail 74 and the square hole plate 75. During the rotation of the positive and negative screw rod 4, it can drive the moving seat 2 to move through the thread fit with the thread seat 5. During the movement of the moving seat 2, the clamping range can be adjusted. After the adjustment is completed, release the knob 6, and the second spring 76 resets. The second spring 76 drives the square rod nail 74 to drive the knob 6 to slide back to its original position through the elastic force. During the reset process of the knob 6, it can drive the tooth groove 73 to slide to the outer side of the tooth bar 72, thus completing the locking of the knob 6 and the positive and negative screw rod 4, and making the adjustment of the moving seat 2 more stable;

[0026] Then pull the pull rod frame 13, the pull rod frame 13 drives the clamping strip 11 and the rubber strip 12 to move through the connecting rod 10 and compresses the first spring 14. When pulled a certain distance, place the circuit board between the rubber strips 12, and then release the pull rod frame 13. The first spring 14 resets, and the first spring 14 can drive the rubber strip 12 on the outer side of the clamping strip 11 to squeeze against the outer side of the circuit board through the elastic force, thus completing the clamping of the circuit board. And because the circuit board only receives the pressure transmitted from above during the detection process, the circuit board can be clamped stably.

[0027] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A withstand voltage test fixture for a circuit board, comprising a fixture seat (1), characterized in that: The upper end of the clamp seat (1) is slidably connected to a movable seat (2), and the lower end of the clamp seat (1) is fixedly connected to two symmetrically distributed mounting frames (3), and the interiors of the two mounting frames (3) are commonly installed with forward and reverse screws (4) through bearings. The lower end of the movable seat (2) is fixedly connected to a threaded seat (5), and the outer left part of the forward and reverse screws (4) is slidably connected to a knob (6), and the interior of the forward and reverse screws (4) is provided with a locking mechanism (7). The middle part of the upper end of the clamp seat (1) is fixedly connected to a support bar (9), and the interior of the movable seat (2) is slidably connected to three evenly distributed connecting rods (10), and the end of the connecting rod (10) away from the movable seat (2) is fixedly connected to a clamping bar (11), and the outer side of the clamping bar (11) is fixedly connected to a rubber strip (12), and the end of the connecting rod (10) away from the clamping bar (11) is fixedly connected to a pull rod frame (13), and the outer side of the connecting rod (10) is provided with a spring 1 (14).

2. A circuit board withstand voltage test fixture according to claim 1, characterized in that: The threaded seat (5) is slidably connected to the clamp seat (1), and the threaded seat (5) is connected to the forward and reverse screw rods (4) via threads. A support seat (8) is fixedly connected to the middle part of the lower end of the clamp seat (1), and the support seat (8) is connected to the middle part of the forward and reverse screw rods (4) via bearings.

3. A circuit board withstand voltage test fixture according to claim 1, characterized in that: The rubber strip (12) is slidably connected to the support strip (9), the movable seat (2) is slidably connected to the support strip (9), and the clamping strip (11) is slidably connected to the support strip (9).

4. A circuit board withstand voltage test fixture according to claim 1, characterized in that: One end of the spring one (14) is fixedly connected to the movable seat (2), and the other end of the spring one (14) is fixedly connected to the clamping strip (11).

5. The circuit board withstand voltage test fixture according to claim 1, characterized in that: The locking mechanism (7) comprises a fixing column (71), the middle part of the left end of the clamp seat (1) is fixedly connected to the fixing column (71), the lower end of the fixing column (71) is fixedly connected to a toothed bar (72), the outer side of the knob (6) is provided with a plurality of tooth grooves (73) distributed in an annular shape, the inner wall of the knob (6) is fixedly connected to a square rod nail (74), the left end of the forward and reverse screw rods (4) is fixedly connected to a square hole plate (75), and the outer side of the square rod of the square rod nail (74) is provided with a second spring (76).

6. A circuit board withstand voltage test fixture according to claim 5, characterized in that: The square rod of the square rod nail (74) is slidably connected to the square hole plate (75), the square hole plate (75) is in slidable contact with the knob (6), and the tooth bar (72) is slidably connected to the tooth groove (73).

7. The circuit board withstand voltage test fixture according to claim 5, characterized in that: One end of the second spring (76) is fixedly connected to the square hole plate (75), and the other end of the second spring (76) is fixedly connected to the square rod nail (74).

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