PCB (Printed Circuit Board) test fixture

Abstract

The utility model discloses a PCB circuit board test tool. The PCB circuit board test tool comprises an equipment box body; the working table is arranged on one side of the equipment box body, two moving tables are arranged at the top of the working table in a sliding mode, driving parts are arranged in the middles of the two moving tables and used for driving the two moving tables to be pushed out alternately, and testing needles are installed at the tops of the moving tables. The beneficial effects of the utility model are that through the arrangement of the gas collection box and the positioning through hole, when the mobile station carries the circuit board to be tested to enter a test position, the solenoid valve of the gas inlet pipe controls the gas to be emitted through the gas collection box and the positioning through hole, so that dust and foreign matters on the surface of the circuit board are effectively removed, and the accuracy and stability of the test are ensured; a plurality of positioning through holes are formed in the acrylic plate at equal intervals and are used for fixing and positioning the pressing needles; according to different to-be-tested circuit boards, the positioning pressing needles can be inserted into different positioning through holes to adjust the fixing position of the jig, the acrylic plate does not need to be disassembled and replaced, and the testing flexibility and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PCB circuit board test technical field, concretely is a kind of PCB circuit board test fixture. BACKGROUND

[0002] PCB circuit board test is the key step to ensure the quality and performance of printed circuit board (PCB). Through various test methods, the electrical connectivity of the circuit board, component function, soldering quality and overall performance can be checked. PCB testing can be carried out at different production stages to ensure that the product meets the expected quality standards during design and production.

[0003] When testing PCB circuit boards of different shapes and specifications, the fixture needs to be disassembled and replaced before testing due to different fixed and compressed positions, which is tedious and makes the adjustment of the fixture not convenient. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of PCB circuit board test fixture to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of PCB circuit board test fixture, comprising:

[0006] Equipment box;

[0007] Workbench, workbench is placed in the side of the equipment box, the top of the workbench is slidably provided with two moving tables, the middle part of two moving tables is provided with driving part, for driving two moving tables alternately push out, the top of the moving table is installed with test needle;

[0008] Acrylic plate, acrylic plate is lifted and set in the upper of moving table, the middle part of the acrylic plate is provided with positioning press needle, the middle part of the acrylic plate is equidistantly provided with a plurality of positioning through holes for fixing positioning press needle;

[0009] Gas collection box, gas collection box is placed in the top of acrylic plate, for introducing gas through positioning through hole to clean circuit board.

[0010] As preferred, the top of the workbench is fixedly connected with gantry, the middle part of the gantry is fixedly connected with double-shaft air cylinder, and the output end of the double-shaft air cylinder is fixedly connected with gas collection box.

[0011] As preferred, the top of the gas collection box is connected with air inlet pipe through electromagnetic valve, and the air inlet pipe is connected with gas source.

[0012] As preferred, the top of the workbench is symmetrically provided with two groups of guide rails, each group of guide rails is provided with two and is slidably connected with moving table.

[0013] As preferred, the driving part comprises a driving gear rotatably installed on the top of the workbench, two driving racks are connected with the outer side of the driving gear in engagement, the two driving racks coincide about the driving gear by 180°, and the driving racks are fixedly connected with the moving tables.

[0014] As preferred, a driving cylinder is fixedly connected on the top of the workbench and between the two moving tables, and the output end of the driving cylinder is fixedly connected with one of the moving tables.

[0015] As preferred, a mounting plate is detachably installed on the top of the moving table, a limiting plate is fixedly connected on the bottom of the mounting plate, and the test needle is fixedly connected on the top of the mounting plate.

[0016] Compared with the prior art, the utility model has the advantages that: through the setting of the gas collecting box and the positioning through hole, the circuit board can be efficiently cleaned before testing, and the test effect is prevented from being affected by foreign matters; when the moving table with the circuit board to be tested enters the testing position, the electromagnetic valve of the air inlet pipe controls the gas to be diffused through the gas collecting box and the positioning through hole, dust and foreign matters on the surface of the circuit board are effectively removed, and the accuracy and stability of the test are ensured; a plurality of positioning through holes are equidistantly arranged on the acrylic plate and used for fixing the positioning pressure needle; according to different circuit boards to be tested, the positioning pressure needle can be inserted into different positioning through holes to adjust the fixing position of the jig, the acrylic plate does not need to be disassembled and replaced, and the flexibility and efficiency of the test are improved; through the setting of the driving part and the guide rail, the two moving tables are alternately pushed out and reset, the test process is more coherent and efficient; the driving cylinder drives one of the moving tables to slide along the guide rail, drives the driving rack to move at the same time, the synchronous movement of the driving rack and the moving table on the other side is realized through the driving gear, and the automation degree of the test is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a structural schematic view of the portal frame of the utility model;

[0019] Figure 3 It is a structural schematic view of the positioning through hole of the utility model;

[0020] Figure 4 It is a structural schematic view of the guide rail of the utility model;

[0021] Figure 5 It is a structural schematic view of the driving gear of the utility model.

[0022] In the figure: 1, equipment box; 2, gantry; 3, double-shaft air cylinder; 4, gas collecting box; 5, air inlet pipe; 6, acrylic plate; 7, positioning through hole; 8, positioning pressure pin; 9, driving gear; 10, moving table; 11, driving rack; 12, driving cylinder; 13, guide rail; 14, workbench; 15, test needle; 16, mounting plate; 17, limiting plate. DETAILED DESCRIPTION

[0023] The technical solutions 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 part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figure 1 、 2 , 3, 4, 5, the utility model provides a technical scheme: a kind of PCB circuit board test fixture, comprising: equipment box 1;Workbench 14 is fixedly connected in the side of equipment box 1, the top of workbench 14 is slidably provided with two moving tables 10, the middle part of two moving tables 10 is provided with driving part, for driving two moving tables 10 alternately push out, the top of moving table 10 is provided with test needle 15, test needle 15 is connected with test system;Acrylic plate 6 is arranged above moving table 10, and positioning pressure pin 8 is inserted in the middle part of acrylic plate 6, the outer side of positioning pressure pin is provided with limiting ring, to prevent positioning pressure pin from completely sinking into positioning through hole 7, and a plurality of positioning through holes 7 for fixing positioning pressure pin 8 are equidistantly formed in the middle part of acrylic plate 6;Gas collecting box 4 is placed on the top of acrylic plate 6, for introducing gas to clean circuit board through positioning through hole 7.

[0025] It should be noted that the utility model places the circuit board to be tested on the top of test needle 15, when driving part drives the circuit board to be tested to enter below acrylic plate 6, another moving table 10 is pushed out under the action of linkage, when moving table 10 with the circuit board to be tested contacts corresponding travel switch, electromagnetic valve of air inlet pipe 5 controls air inlet pipe 5 to ventilate, air inlet pipe 5 is scattered through positioning through hole 7 after passing through gas collecting box 4, to clean the circuit board below, prevent foreign matter from contacting positioning pressure pin 8, so that the circuit board is unevenly stressed when being pressed, affect the test effect, according to different circuit boards to be tested, positioning pressure pin 8 can be inserted into different positioning through holes 7 to adjust the fixing position of fixture, without disassembling and replacing multiple acrylic plates 6.

[0026] Please refer to Figure 1 、 2As shown in Figure 3, a gantry frame 2 is fixedly connected to the top of the workbench 14, and a dual-axis cylinder 3 is fixedly connected to the middle of the gantry frame 2. The output end of the dual-axis cylinder 3 is fixedly connected to the air collection box 4. The top of the air collection box 4 is connected to the air inlet pipe 5 through a solenoid valve, and the air inlet pipe 5 is connected to the air source.

[0027] It should be noted that when the moving stage 10 is resetting with the circuit board under test, when the moving stage 10 contacts the corresponding limit switch, the solenoid valve of the air inlet pipe 5 opens, and high-pressure air enters the air collection box 4 through the air inlet pipe 5 and is blown downward through the positioning through hole 7 to clean the circuit board and prevent foreign objects from causing uneven force. Under the action of the timer, the dual-axis cylinder 3 drives the acrylic plate 6 to move downward through the air collection box 4. The acrylic plate 6 drives the positioning pin 8 to press firmly on the circuit board, so that the test pin 15 can be used to test it.

[0028] Please see Figure 4 , 5 As shown, two sets of guide rails 13 are symmetrically arranged on the top of the worktable 14. Each set of guide rails 13 has two rails and is slidably connected to the moving platform 10. The drive unit includes a drive gear 9 rotatably mounted on the top of the worktable 14. Two drive racks 11 are meshed on the outer side of the drive gear 9. The two drive racks 11 are rotated 180° about the drive gear 9 and coincide. The drive racks 11 are fixedly connected to the moving platform 10. A drive cylinder 12 is fixedly connected on the top of the worktable 14 and between the two moving platforms 10. The output end of the drive cylinder 12 is fixedly connected to one of the moving platforms 10.

[0029] It should be noted that when the present invention drives the moving stage 10, the driving cylinder 12 drives one of the moving stages 10 to slide along the guide rail 13. When the moving stage 10 slides along the guide rail 13, it drives the driving rack 11 to move. The driving rack 11 drives the driving rack 11 on the other side to move through the driving gear 9, thereby realizing that the two moving stages 10 alternately enter the test position.

[0030] Please see Figure 2 , 3 As shown in Figure 4, a mounting plate 16 is detachably mounted on the top of the moving stage 10, a limiting plate 17 is fixedly connected to the bottom of the mounting plate 16, and the test probe 15 is fixedly connected to the top of the mounting plate 16.

[0031] It should be noted that the movable stage 10 of this utility model has a wire connected to the test probe 15 inside. Different mounting plates 16 can be used to test different circuit boards. Multiple limiting pins are fixed to the top of the mounting plate 16 to position the circuit board from the outside. When replacing, the screws between the limiting plate 17 and the movable stage 10 are removed. After replacing the mounting plate 16, the limiting plate 17 is connected to the side of the movable stage 10 by bolts to complete the installation.

[0032] In the description of the utility model, need understanding is, the term "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as a restriction on the utility model.

[0033] In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features limited by "first", "second", "third", "fourth" can be explicitly or implicitly include at least one of the features.

[0034] In the utility model, unless otherwise expressly provided and limited, the terms "installation", "arrangement", "connection", "fixing", "screw connection" and so on should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrated, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise expressly limited, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] Although the embodiments of the utility model have been shown and described, for ordinary skilled in the art, it can be understood that the embodiments can be changed, modified, replaced and changed in various ways without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A PCB circuit board testing fixture, characterized in that: include: Equipment enclosure (1); Workbench (14) is placed on one side of the equipment box (1). Two movable stages (10) are slidably arranged on the top of the workbench (14). A drive unit is provided in the middle of the two movable stages (10) to drive the two movable stages (10) to push out alternately. A test needle (15) is installed on the top of the movable stage (10). Acrylic plate (6), the acrylic plate (6) is raised and lowered above the moving platform (10), the middle part of the acrylic plate (6) is provided with a positioning pin (8), and the middle part of the acrylic plate (6) is provided with a plurality of positioning through holes (7) for fixing the positioning pin (8) at equal intervals. Gas collection box (4) is placed on top of the acrylic plate (6) and is used to introduce gas through the positioning through hole (7) to clean the circuit board.

2. The PCB circuit board testing fixture according to claim 1, characterized in that: A gantry frame (2) is fixedly connected to the top of the workbench (14), and a dual-axis cylinder (3) is fixedly connected to the middle of the gantry frame (2). The output end of the dual-axis cylinder (3) is fixedly connected to the air collection box (4).

3. A PCB circuit board testing fixture according to claim 2, characterized in that: The top of the gas collection box (4) is connected to an air inlet pipe (5) via a solenoid valve, and the air inlet pipe (5) is connected to an air source.

4. A PCB circuit board testing fixture according to claim 1, characterized in that: The top of the worktable (14) is symmetrically provided with two sets of guide rails (13), each set of guide rails (13) has two rails and is slidably connected to the moving table (10).

5. A PCB circuit board testing fixture according to claim 4, characterized in that: The drive unit includes a drive gear (9) rotatably mounted on the top of the worktable (14). Two drive racks (11) are meshed on the outer side of the drive gear (9). The two drive racks (11) rotate 180° about the drive gear (9) to coincide. The drive racks (11) are fixedly connected to the corresponding moving table (10).

6. A PCB circuit board testing fixture according to claim 5, characterized in that: A drive cylinder (12) is fixedly connected to the top of the worktable (14) and between the two moving platforms (10), and the output end of the drive cylinder (12) is fixedly connected to one of the moving platforms (10).

7. A PCB circuit board testing fixture according to claim 6, characterized in that: The top of the mobile stage (10) is detachably mounted with an installation plate (16), and the bottom of the installation plate (16) is fixedly connected with a limiting plate (17). The test needle (15) is fixedly connected to the top of the installation plate (16).

Images