Test fixture special for SMT (Surface Mount Technology) of electronic industrial equipment
By using a three-axis moving mechanism and an adjustment mechanism to drive the synchronous and equidistant movement of the test probes, the problem of existing SMT test fixtures being unable to adapt to different PCB designs is solved. This enables flexible adjustment and convenient replacement of the test probes, improving test accuracy and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-03-24
AI Technical Summary
Existing SMT test fixtures lack flexibility and are difficult to adapt to the testing needs of different PCB designs, resulting in decreased test accuracy and reliability. At the same time, frequent fixture changes increase production costs and time.
The test stylus is driven by a three-axis moving mechanism, combined with an adjustment mechanism and lifting components, to achieve synchronous and equidistant movement and convenient replacement of the test stylus. The stylus spacing can be flexibly adjusted through the L-shaped plate and guide rail slider structure, and the threaded connection between the test stylus and the L-shaped plate facilitates maintenance.
It improves the versatility and accuracy of testing fixtures, reduces the cost and time of fixture replacement, and increases the efficiency of equipment use and production.
Smart Images
Figure CN224035556U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to SMT test fixture technical field, specifically, relate to a kind of electronic industrial equipment SMT special test fixture. BACKGROUND
[0002] In the field of surface mount technology (SMT) of electronic industry, with the development of electronic products towards miniaturization, high density and multifunction, higher and higher requirements are put forward for the testing link in SMT production process. SMT test fixture is a testing equipment used in SMT production line, which is used to detect the performance and function of printed circuit board (PCB).
[0003] Although the traditional SMT test fixture can move flexibly by the three-axis moving mechanism to drive the test needle, it can realize testing in different areas. However, different PCB designs may have different test point spacing and layout methods. Many existing test fixtures lack flexibility, and the position of the test needle is relatively fixed, which is difficult to adapt to the testing needs of different PCB products. For example, when a new type of PCB design is encountered, the test point spacing does not match the test needle layout of the traditional fixture, which may cause the test needle to fail to accurately contact the test point, thereby affecting the accuracy and reliability of the test. In addition, in the mass production process, frequent replacement of different test fixtures to adapt to the testing needs of different products will increase the production cost and production time, and reduce the production efficiency. SUMMARY
[0004] The utility model aims at solving the shortcomings in the prior art and proposes an electronic industrial equipment SMT special test fixture.
[0005] To solve the above background technical problems, the utility model adopts the following technical scheme:
[0006] An electronic industrial equipment SMT special test fixture, comprising a test table, a three-axis moving mechanism is provided on the test table, a shell is provided at the bottom of the three-axis moving mechanism, a strip-shaped opening is formed at the bottom of the shell, a plurality of equidistantly arranged test needles are inserted into the strip-shaped opening, a tester is provided on the surface of the shell, a plurality of test needles are respectively connected to the tester through wires, and an adjusting mechanism for driving the plurality of test needles to move synchronously and equidistantly is provided in the shell.
[0007] As a further description of the above technical solution: the adjusting mechanism comprises L-shaped plates, the number of the L-shaped plates is consistent with the number of the test needles, the test needles are installed on the L-shaped plates, a transversely arranged guide rail is fixedly connected to the rear inner wall of the shell, a sliding block is fixedly connected to the rear side of each L-shaped plate, all the L-shaped plates are equidistantly and slidably connected to the guide rail through the sliding blocks, a lifting plate is arranged in the shell and located at the front side of the L-shaped plates, a guide hole is formed in the surface of the lifting plate and corresponds to the L-shaped plate, a limiting shaft is slidably connected in each guide hole, and each limiting shaft is rotatably connected to the corresponding L-shaped plate, and all the guide holes are equidistantly and obliquely upwardly arranged from the middle to both sides.
[0008] As a further description of the above technical solution: the lifting assembly comprises connecting sleeves fixed to the left and right sides of the lifting plate, a threaded hole is formed in one of the connecting sleeves and a threaded rod is threadedly connected to the threaded hole, a limiting rod is slidably connected to the other connecting sleeve, the top end and the bottom end of the threaded rod are rotatably connected to the shell, the top end and the bottom end of the limiting rod are fixedly connected to the shell, a servo motor is fixedly installed at the top of the shell, and the output shaft of the servo motor is fixedly connected to the threaded rod.
[0009] As a further description of the above technical solution: the number of the guide rails is two, and the two guide rails are arranged in parallel.
[0010] As a further description of the above technical solution: a mounting threaded hole is formed in the L-shaped plate, and an external thread matched with the threaded hole is arranged on the surface of the test needle, and the test needle is threadedly connected to the L-shaped plate.
[0011] As a further description of the above technical solution: the bottom of the test table is provided with an anti-skid pad, and the bottom of the anti-skid pad is provided with anti-skid patterns.
[0012] Compared with the prior art, the utility model has the advantages that:
[0013] Firstly, the adjusting mechanism can drive multiple test needles to move synchronously and equidistantly, so that the spacing of the test needles can be adjusted according to the layout of test points of different PCBs. This greatly improves the universality of the test fixture, can adapt to the test requirements of PCBs of various types and specifications, and reduces the cost and time of redesigning the test fixture for different PCBs.
[0014] Secondly, since the test needles are threadedly connected to the L-shaped plates, when the test needles are worn, damaged or need to be replaced with test needles of different specifications, the test needles can be conveniently disassembled from the L-shaped plates for maintenance or replacement operation. This helps to shorten the maintenance time of the test fixture and improve the use efficiency of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic view of the utility model;
[0016] Figure 2 It is a structural schematic view of the adjusting mechanism of the utility model;
[0017] Figure 3 It is a structural schematic view of the L-shaped plate of the utility model.
[0018] Mark explanation in the drawing:
[0019] 1, test platform; 2, three-axis moving mechanism; 3, shell; 4, strip-shaped mouth; 5, test needle; 6, tester; 7, adjusting mechanism; 71, L-shaped plate; 711, threaded hole; 72, guide rail; 73, sliding block; 74, lifting plate; 75, guide hole; 76, limiting shaft; 8, lifting assembly; 81, connecting sleeve; 82, threaded rod; 83, limiting rod; 84, servo motor. Specific implementation
[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.
[0021] Please refer to Figures 1-3 A kind of electronic industry equipment SMT special test fixture, including test platform 1, test platform 1 is provided with three-axis moving mechanism 2, the bottom of three-axis moving mechanism 2 is provided with shell 3.Test platform 1 on three-axis moving mechanism 2 can drive the shell 3 at the bottom in three-dimensional space moves, this makes test fixture can be accurately positioned to the area that needs to be tested on PCB board, adapt to different size and layout PCB board.
[0022] The bottom of shell 3 is provided with strip-shaped mouth 4, a plurality of equidistantly arranged test needles 5 are inserted in strip-shaped mouth 4, the surface of shell 3 is provided with tester 6, a plurality of test needles 5 are connected with tester 6 by wire respectively, adjusting mechanism 7 for driving a plurality of test needles 5 to move equidistantly synchronously is arranged in shell 3.This design makes the position of test needle 5 can be adjusted according to the test point layout of different PCB, simultaneously, test needle 5 is connected with tester 6 by wire respectively, so as to accurately carry out various test operations, thereby effectively improve the accuracy, flexibility and efficiency of SMT test.
[0023] As Figure 2 , 3As shown, the adjusting mechanism 7 comprises L-shaped plates 71, the number of the L-shaped plates 71 is consistent with the number of the test needles 5, the test needles 5 are installed on the L-shaped plates 71, transversely arranged guide rails 72 are fixedly connected to the rear inner wall of the shell 3, the rear side of each L-shaped plate 71 is fixedly connected with a sliding block 73, all the L-shaped plates 71 are equidistantly and slidingly connected to the guide rails 72 through the sliding blocks 73 respectively, a lifting plate 74 is arranged in the shell 3 and located at the front side of the L-shaped plates 71, guide holes 75 are formed in the surface of the lifting plate 74 and correspond to the L-shaped plates 71, a limiting shaft 76 is slidingly connected in each guide hole 75, and each limiting shaft 76 is rotationally connected with the corresponding L-shaped plate 71 respectively, all the guide holes 75 are equidistantly and obliquely upwardly arranged from the middle to both sides, and a lifting assembly 8 for driving the lifting plate 74 to lift is arranged in the shell 3. The lifting plate 74 is driven to lift by the lifting assembly 8, and when the lifting plate 74 lifts, the limiting shaft 76 in the guide hole 75 on the surface of the lifting plate 74 will drive the corresponding L-shaped plate 71 to move, because all the guide holes 75 are equidistantly and obliquely upwardly arranged from the middle to both sides, when the lifting plate 74 rises, the L-shaped plates 71 will equidistantly slide outward along the guide rails 72, and when the lifting plate 74 descends, the L-shaped plates 71 will equidistantly slide inward along the guide rails 72. Since the test needles 5 are installed on the L-shaped plates 71, the test needles 5 will move equidistantly synchronously with the L-shaped plates 71, so that the adjustment of the distance between the test needles 5 is realized.
[0024] In addition, the number of the guide rails 72 is two, and the two guide rails 72 are arranged in parallel from top to bottom, so that the stability of sliding is enhanced.
[0025] As shown in the figure, Figure 2 The lifting assembly 8 comprises connecting sleeves 81 fixedly connected to the left and right sides of the lifting plate 74, one of the connecting sleeves 81 is provided with a thread and is threadedly connected with a threaded rod 82, the other connecting sleeve 81 is provided with a limiting rod 83 slidingly connected therewith, the top end and the bottom end of the threaded rod 82 are rotationally connected with the shell 3 respectively, the top end and the bottom end of the limiting rod 83 are fixedly connected with the shell 3 respectively, a servo motor 84 is fixedly installed on the top of the shell 3, and the output shaft of the servo motor 84 is fixedly connected with the threaded rod 82. When the servo motor 84 on the top of the shell 3 is started, the output shaft drives the threaded rod 82 to rotate. Since one of the connecting sleeves 81 on the left and right sides of the lifting plate 74 is threadedly connected with the threaded rod 82, and the other is slidingly connected with the limiting rod 83, when the threaded rod 82 rotates, the threadedly connected connecting sleeve 81 will move up and down along the threaded rod 82, and the slidingly connected connecting sleeve 81 will move up and down along the limiting rod 83, so that the lifting movement of the lifting plate 74 is realized.
[0026] As shown in the figure, Figure 3As shown, the L-shaped plate 71 is provided with a mounting threaded hole 711, and the surface of the test needle 5 is provided with an external thread matched with the threaded hole 711, and the test needle 5 is screwed on the L-shaped plate 71. Since the test needle 5 is screwed on the L-shaped plate 71, when the test needle 5 is worn, damaged or needs to be replaced with a test needle 5 of different specifications, the test needle 5 can be conveniently disassembled from the L-shaped plate 71 for maintenance or replacement operation. This helps to shorten the maintenance time of the test fixture and improve the use efficiency of the equipment.
[0027] In addition, the bottom of the test table 1 is provided with a non-slip pad, and the bottom of the non-slip pad is provided with non-slip lines to increase the stability of the test table 1.
[0028] The above is only a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited thereto. Any skilled person in the art, according to the technical scheme and improvement concept of the present application, should be covered within the protection scope of the present application.
Claims
1. An electronic industry equipment SMT special test fixture, comprising a test table (1), a three-axis moving mechanism (2) is arranged on the test table (1), characterized in that: The bottom of the three-axis moving mechanism (2) is provided with a shell (3), the bottom of the shell (3) is provided with a strip-shaped opening (4), a plurality of equidistantly arranged test needles (5) are arranged in the strip-shaped opening (4), the surface of the shell (3) is provided with a tester (6), a plurality of test needles (5) are connected with the tester (6) through wires respectively, and the shell (3) is provided with an adjusting mechanism (7) for driving the plurality of test needles (5) to move equidistantly and synchronously.
2. The electronic industry equipment SMT special test fixture of claim 1, wherein: The adjusting mechanism (7) comprises L-shaped plates (71), the number of the L-shaped plates (71) is consistent with the number of the test needles (5), the test needles (5) are installed on the L-shaped plates (71), the rear inner wall of the shell (3) is fixedly connected with transversely arranged guide rails (72), the rear side of each L-shaped plate (71) is fixedly connected with a sliding block (73), all the L-shaped plates (71) are equidistantly and slidably connected to the guide rails (72) through the sliding blocks (73), the front side of the L-shaped plate (71) in the shell (3) is provided with a lifting plate (74), the surface of the lifting plate (74) is provided with a guide hole (75) corresponding to the L-shaped plate (71), each guide hole (75) is slidably connected with a limiting shaft (76), each limiting shaft (76) is rotatably connected with the corresponding L-shaped plate (71), and all the guide holes (75) are equidistantly and obliquely arranged upwards from the middle to both sides.
3. The electronic industry equipment SMT special test fixture according to claim 2, characterized in that: The lifting assembly (8) comprises a connecting sleeve (81) fixed on the left and right sides of the lifting plate (74), one of the connecting sleeves (81) is provided with a threaded hole and is threadedly connected with a threaded rod (82), the other connecting sleeve (81) is provided with a limiting rod (83) slidably connected therewith, the top end and the bottom end of the threaded rod (82) are rotatably connected with the shell (3), the top end and the bottom end of the limiting rod (83) are fixedly connected with the shell (3), the top of the shell (3) is fixedly installed with a servo motor (84), and the output shaft of the servo motor (84) is fixedly connected with the threaded rod (82).
4. The electronic industry equipment SMT special test fixture of claim 2, wherein: The number of the guide rails (72) is two, and the two guide rails (72) are arranged in parallel.
5. The electronic industry equipment SMT special test fixture according to claim 2, characterized in that: The L-shaped plate (71) is provided with a mounting threaded hole (711), the surface of the test needle (5) is provided with an external thread matched with the threaded hole (711), and the test needle (5) is threadedly connected with the L-shaped plate (71).
6. The electronic industry equipment SMT special test fixture of claim 1, wherein: The bottom of the test table (1) is provided with an anti-skid pad, and the bottom of the anti-skid pad is provided with anti-skid lines.