LED test fixture

Abstract

The utility model relates to the technical field of LED testing, and discloses an LED testing jig which comprises a base box, the upper surface of the base box is fixedly connected with an installation shell, the front face of the installation shell is fixedly provided with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a lifting plate, and the lifting plate is fixedly connected with an LED lamp. And four positioning buffer columns are fixedly connected to the lower surface of the lifting plate. According to the utility model, the surface of the movable pressing plate is provided with the positioning buffer column and the compression spring, when the electric telescopic rod drives the lifting plate to move downwards, the movable pressing plate on the surface of the positioning buffer column can be driven to move towards the surface of the circuit board, and then the positioning pressing rod on the lower surface of the movable pressing plate is driven to contact with the surface of the circuit board; and meanwhile, a movable pressing plate is pushed to move on the surface of a positioning buffer column by utilizing the counter-acting force borne by a positioning pressing rod, and a compression spring on the surface of the positioning buffer column is extruded, so that the thrust borne by the circuit board by the positioning pressing rod can be buffered, and the effect of protecting the circuit board is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED testing, and more specifically to an LED testing fixture. Background Art

[0002] LED devices are semiconductor devices with sensitive characteristics and have relatively poor surge resistance, especially the ability to resist reverse voltage. Existing LED device testing fixtures generally have an operating table for detection. The LED device is placed in a placement groove on the operating table, and the LED device is tested by means of a detection pressure head.

[0003] An LED lamp testing fixture with the publication number of CN218546967U includes a base. A top frame is fixedly connected to the top of the base. A pushing cylinder is fixedly connected to the top of the top frame. The output end of the pushing cylinder is fixedly connected to a pushing plate. A fixing plate is fixedly connected to the bottom of the pushing plate. A test probe is fixedly connected to the bottom of the fixing plate. By driving the rotation of the rotating shaft through a servo motor and making the movable rod rotate around the turntable through the rotation of the rotating shaft, the utility model has the advantages of high test accuracy and solves the problem of low test accuracy of existing LED lamp testing fixtures when in use.

[0004] When the LED lamp testing fixture proposed in the above patent document is actually used, when driving the test probe to contact the circuit board downward by means of a cylinder, when the test probe contacts the circuit board, it is easy to generate a certain impact force on the circuit board, resulting in a certain pressure on the surface of the circuit board and easily causing damage to the surface of the circuit board. Therefore, it is necessary to improve the disadvantages of the above testing fixture. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an LED testing fixture to solve the problems existing in the above background art.

[0006] The utility model provides the following technical solution: an LED testing fixture, including a base box. An installation shell is fixedly connected to the upper surface of the base box. An electric telescopic rod is fixedly installed on the front surface of the installation shell. The telescopic end of the electric telescopic rod is fixedly connected to a lifting plate. Four positioning buffer columns are fixedly connected to the lower surface of the lifting plate. A movable pressing plate is slidably sleeved on the surfaces of the four positioning buffer columns, and a compression spring is sleeved on the surfaces of the positioning buffer columns. A plurality of positioning pressing rods are installed on the surface of the movable pressing plate;

[0007] The top end of the positioning pressing rod is fixedly connected with a rubber limiting ring. A plurality of positioning insertion holes are formed on the surface of the movable pressing plate. The rubber limiting ring is matched with the positioning insertion holes. The positioning pressing rod is fixedly installed on the lower surface of the movable pressing plate through the rubber limiting ring and the positioning insertion holes;

[0008] A limiting mechanism is provided on the upper surface of the base box. The limiting mechanism includes a limiting round box. A bidirectional lead screw is rotatably connected to the inner wall of the limiting round box, and two limiting clamping blocks are threadedly connected to the surface of the bidirectional lead screw.

[0009] Furthermore, an adjustment groove is formed in the front surface of the limiting round box. An adjustment rod is rotatably connected to the inner wall of the adjustment groove. The rear end of the adjustment rod extends into the interior of the limiting round box and is fixedly connected to a driving gear.

[0010] Furthermore, an adjustment knob is fixedly connected to the front end of the adjustment rod. A driven gear is fixedly connected to the surface of the bidirectional lead screw. The position of the driving gear corresponds to that of the driven gear, and the driving gear meshes with the driven gear.

[0011] Furthermore, two symmetrically arranged strip-shaped guide grooves are formed in the upper surface of the limiting round box. The limiting clamping blocks are slidably connected to the inner walls of the strip-shaped guide grooves. Arc-shaped limiting grooves are formed in the opposite surfaces of the two limiting clamping blocks.

[0012] Furthermore, four support columns are fixedly connected to the upper surface of the limiting round box. The tops of the four support columns are fixedly connected to a limiting support plate, and the limiting support plate is made of transparent plastic material.

[0013] Furthermore, two clamping holes are formed in the surface of the limiting support plate. The positions of the clamping holes correspond to those of the limiting clamping blocks, and the sizes of the clamping holes match those of the limiting clamping blocks.

[0014] Furthermore, the bottom end of the compression spring is fixedly connected to the upper surface of the movable pressing plate, and the top end of the compression spring is fixedly connected to the lower surface of the lifting plate. A limiting stop block is fixedly connected to the top end of the positioning buffer post.

[0015] Furthermore, guide columns are fixedly provided on the left and right inner sides of the installation shell. Guide blocks are fixedly connected to the left and right sides of the lifting plate. The guide blocks are slidably connected to the surfaces of the guide columns.

[0016] The technical effects and advantages of the present utility model:

[0017] 1. By providing a positioning buffer post and a compression spring on the surface of the movable pressing plate in the present utility model, when the lifting plate is driven by the electric telescopic rod to move downward, the movable pressing plate on the surface of the positioning buffer post can be driven to move towards the surface of the circuit board, and then the positioning pressing rod on the lower surface of the movable pressing plate contacts the surface of the circuit board. At the same time, the reaction force received by the positioning pressing rod is used to push the movable pressing plate to move on the surface of the positioning buffer post, and the compression spring on the surface of the positioning buffer post is squeezed, so that the thrust of the circuit board received by the positioning pressing rod can be buffered, playing a role in protecting the circuit board.

[0018] 2. The utility model is provided with a plurality of positioning jacks on the surface of the movable pressure plate. According to the distribution of the component positions on the surface of the circuit board, the positioning pressure rods can be installed in the positioning jacks at different positions on the surface of the movable pressure plate, so as to facilitate the adaptive adjustment of the positions of the positioning pressure rods, and further be applicable to the testing of circuit boards with different surface structures, improving the practicability of the testing fixture.

[0019] 3. By setting a limiting mechanism, the utility model can drive the bidirectional lead screw to rotate by means of an adjusting rod, and then drive two limiting clamping blocks to move in the strip-shaped guide grooves on the surface of the limiting round box. The two limiting clamping blocks are used to clamp and fix both sides of the circuit board, which is applicable to circuit boards of different lengths. Moreover, the arc-shaped limiting grooves on the surface of the limiting clamping blocks can be used to clamp and limit circular circuit boards, improving the application range of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view structural schematic diagram of the utility model;

[0021] Figure 2 is a structural schematic diagram of the bottom view of the movable pressure plate of the utility model;

[0022] Figure 3 is a front view structural schematic diagram of the movable pressure plate and the lifting plate of the utility model;

[0023] Figure 4 is a front sectional structural schematic diagram of the positioning jack of the utility model;

[0024] Figure 5 is a top view structural schematic diagram of the limiting mechanism of the utility model;

[0025] Figure 6 is a top sectional structural schematic diagram of the limiting round box of the utility model.

[0026] The reference numerals are: 1, base box; 2, mounting shell; 3, electric telescopic rod; 4, limiting mechanism; 5, positioning buffer column; 6, movable pressure plate; 7, compression spring; 8, positioning pressure rod; 9, rubber limiting ring; 10, positioning jack; 11, limiting stop block; 12, guide post; 13, guide block; 14, lifting plate.

[0027] 401, limiting round box; 402, bidirectional lead screw; 403, limiting clamping block; 404, adjusting groove; 405, adjusting rod; 406, driving gear; 407, adjusting knob; 408, driven gear; 409, strip-shaped guide groove; 410, arc-shaped limiting groove; 411, support column; 412, limiting support plate; 413, clamping hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. In addition, the forms of each structure described in the following embodiments are merely examples. An LED test fixture related to the present utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0029] Referring to Figures 1-6 , the present utility model provides an LED test fixture, which includes a base box 1. The upper surface of the base box 1 is fixedly connected with an installation shell 2. The front surface of the installation shell 2 is fixedly installed with an electric telescopic rod 3. The telescopic end of the electric telescopic rod 3 is fixedly connected with a lifting plate 14. Guide columns 12 are fixedly arranged on the left and right inner sides of the installation shell 2. Guide blocks 13 are fixedly connected to the left and right sides of the lifting plate 14. The guide blocks 13 are slidably connected to the surfaces of the guide columns 12.

[0030] Through the above technical solutions, the guide columns 12 and the guide blocks 13 can play a role in limiting and guiding the lifting plate 14, and improve the stability of the lifting plate 14 during the up and down movement.

[0031] Four positioning and buffer columns 5 are fixedly connected to the lower surface of the lifting plate 14. An activity pressing plate 6 is slidably sleeved on the surfaces of the four positioning and buffer columns 5. A compression spring 7 is sleeved on the surface of the positioning and buffer columns 5. A number of positioning pressing rods 8 are installed on the surface of the activity pressing plate 6.

[0032] The bottom end of the compression spring 7 is fixedly connected to the upper surface of the activity pressing plate 6, and the top end of the compression spring 7 is fixedly connected to the lower surface of the lifting plate 14. A limit stop block 11 is fixedly connected to the top end of the positioning and buffer column 5.

[0033] It should be noted that a control panel is arranged on the front surface of the base box 1. The control panel is electrically connected to the electric telescopic rod 3. The staff can control the electric telescopic rod 3 through the control panel.

[0034] It is worth noting that by arranging the positioning and buffer columns 5 and the compression spring 7 on the surface of the activity pressing plate 6, during the process of testing the circuit board, the electric telescopic rod 3 drives the lifting plate 14 to move downward, and at the same time drives the activity pressing plate 6 on the surface of the positioning and buffer column 5 to move towards the surface of the circuit board. Then, a number of positioning pressing rods 8 on the lower surface of the activity pressing plate 6 contact the surface of the circuit board. At the same time, the reaction force received by the positioning pressing rods 8 drives the activity pressing plate 6 to move upward on the surface of the positioning and buffer column 5, and at the same time squeezes the compression spring 7 on the surface of the positioning and buffer column 5. Thus, the thrust of the positioning pressing rods 8 on the circuit board can be buffered, the impact force generated by the positioning pressing rods 8 on the circuit board can be reduced, and the circuit board can be protected.

[0035] The top end of the positioning pressure rod 8 is fixedly connected with a rubber limiting ring 9. A plurality of positioning jacks 10 are formed on the surface of the movable pressing plate 6. The plurality of positioning jacks 10 are evenly distributed in a rectangular array on the surface of the movable pressing plate 6. The rubber limiting ring 9 is matched with the positioning jacks 10. The positioning pressure rod 8 is fixedly installed on the lower surface of the movable pressing plate 6 through the rubber limiting ring 9 and the positioning jacks 10. By providing the positioning jacks 10, the rubber limiting ring 9 can be inserted into the positioning jacks 10, and the upper and lower ring surfaces of the rubber limiting ring 9 are used to limit the movable pressing plate 6, improving the stability of the positioning pressure rod 8.

[0036] It should be noted that by providing a plurality of positioning jacks 10 on the surface of the movable pressing plate 6, according to the distribution of the components on the surface of the circuit board, the rubber limiting ring 9 at the top end of the positioning pressure rod 8 can be inserted into the positioning jacks 10 at different positions on the surface of the movable pressing plate 6, so as to facilitate the adaptive adjustment of the position of the positioning pressure rod 8, and further be applicable to the testing of circuit boards with different surface structures, improving the practicability of the testing fixture.

[0037] A limiting mechanism 4 is arranged on the upper surface of the base box 1. The limiting mechanism 4 includes a limiting round box 401. Four support columns 411 are fixedly connected to the upper surface of the limiting round box 401. The top ends of the four support columns 411 are fixedly connected with a limiting support plate 412. The limiting support plate 412 is made of transparent plastic material.

[0038] A bidirectional lead screw 402 is rotatably connected to the inner wall of the limiting round box 401. Two limiting clamping blocks 403 are threadedly connected to the surface of the bidirectional lead screw 402. Arc-shaped limiting grooves 410 are formed on the opposite surfaces of the two limiting clamping blocks 403.

[0039] Two clamping holes 413 are formed on the surface of the limiting support plate 412. The positions of the clamping holes 413 correspond to the limiting clamping blocks 403, and the sizes of the clamping holes 413 match the limiting clamping blocks 403.

[0040] Two symmetrically arranged strip-shaped guide grooves 409 are formed on the upper surface of the limiting round box 401. The limiting clamping blocks 403 are slidably connected to the inner walls of the strip-shaped guide grooves 409.

[0041] An adjustment groove 404 is formed on the front surface of the limiting round box 401. An adjustment rod 405 is rotatably connected to the inner wall of the adjustment groove 404. The rear end of the adjustment rod 405 extends into the limiting round box 401 and is fixedly connected with a driving gear 406.

[0042] An adjustment knob 407 is fixedly connected to the front end of the adjustment rod 405. A driven gear 408 is fixedly connected to the surface of the bidirectional lead screw 402. The position of the driving gear 406 corresponds to the driven gear 408, and the driving gear 406 meshes with the driven gear 408.

[0043] It should be noted that by providing a limiting mechanism 4 on the surface of the base box 1, when testing the circuit board, first place the circuit board on the surface of the limiting round box 401, then rotate the adjustment knob 407 to drive the adjustment rod 405 to rotate, thereby driving the driving gear 406 and the driven gear 408 to rotate, and further driving the bidirectional lead screw 402 to rotate. The bidirectional lead screw 402 drives the two limiting clamping blocks 403 to move in the strip-shaped guide groove 409 on the surface of the limiting round box 401, and the two limiting clamping blocks 403 are used to clamp and fix both sides of the circuit board, which is applicable to circuit boards of different lengths. Moreover, the arc-shaped limiting groove 410 on the surface of the limiting clamping block 403 can be used to clamp and limit the circular circuit board, improving the applicable range of the jig.

[0044] Finally, it should be noted that in the drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An LED test fixture, comprising a base box (1), characterized in that: The upper surface of the base box (1) is fixedly connected with a mounting shell (2). The front surface of the mounting shell (2) is fixedly installed with an electric telescopic rod (3). The telescopic end of the electric telescopic rod (3) is fixedly connected with a lifting plate (14). The lower surface of the lifting plate (14) is fixedly connected with four positioning and buffering columns (5). The surfaces of the four positioning and buffering columns (5) are slidably sleeved with a movable pressing plate (6), and a compression spring (7) is sleeved on the surface of the positioning and buffering column (5). A plurality of positioning pressing rods (8) are installed on the surface of the movable pressing plate (6). The top end of the positioning pressing rod (8) is fixedly connected with a rubber limiting ring (9). A plurality of positioning insertion holes (10) are formed in the surface of the movable pressing plate (6). The rubber limiting ring (9) is matched with the positioning insertion holes (10). The positioning pressing rod (8) is fixedly installed on the lower surface of the movable pressing plate (6) through the rubber limiting ring (9) and the positioning insertion holes (10). A limiting mechanism (4) is arranged on the upper surface of the base box (1). The limiting mechanism (4) includes a limiting round box (401). The inner wall of the limiting round box (401) is rotatably connected with a bidirectional lead screw (402). Two limiting clamping blocks (403) are threadedly connected to the surface of the bidirectional lead screw (402).

2. The LED test fixture according to claim 1, wherein: An adjustment groove (404) is formed in the front surface of the limiting round box (401). The inner wall of the adjustment groove (404) is rotatably connected with an adjustment rod (405). The rear end of the adjustment rod (405) extends into the interior of the limiting round box (401) and is fixedly connected with a driving gear (406).

3. The LED testing fixture according to claim 2, wherein: The front end of the adjustment rod (405) is fixedly connected with an adjustment knob (407). A driven gear (408) is fixedly connected to the surface of the bidirectional lead screw (402). The position of the driving gear (406) corresponds to that of the driven gear (408), and the driving gear (406) meshes with the driven gear (408).

4. The LED test fixture according to claim 3, wherein: Two symmetrically arranged strip-shaped guide grooves (409) are formed in the upper surface of the limiting round box (401). The limiting clamping blocks (403) are slidably connected to the inner walls of the strip-shaped guide grooves (409). Arc-shaped limiting grooves (410) are formed in the opposite surfaces of the two limiting clamping blocks (403).

5. The LED testing fixture according to claim 4, wherein: Four support columns (411) are fixedly connected to the upper surface of the limiting round box (401). The top ends of the four support columns (411) are fixedly connected with a limiting support plate (412). The limiting support plate (412) is made of transparent plastic material.

6. The LED testing fixture according to claim 5, wherein: Two clamping holes (413) are formed in the surface of the limiting support plate (412). The positions of the clamping holes (413) correspond to those of the limiting clamping blocks (403), and the sizes of the clamping holes (413) match those of the limiting clamping blocks (403).

7. The LED test fixture according to claim 1, characterized in that: The bottom end of the compression spring (7) is fixedly connected with the upper surface of the movable pressing plate (6), and the top end of the compression spring (7) is fixedly connected with the lower surface of the lifting plate (14). The top end of the positioning and buffering column (5) is fixedly connected with a limiting block (11).

8. The LED testing fixture according to claim 7, wherein: Guide posts (12) are fixedly arranged on the left and right inner sides of the installation shell (2), guide blocks (13) are fixedly connected to the left and right sides of the lifting plate (14), and the surfaces of the guide blocks (13) are slidably connected to the guide posts (12).

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