Precise combined type PCB (Printed Circuit Board) test fixture
By designing a precision composite PCB test fixture with a buffer structure and detachable test probes, the problem of damage during PCB board testing is solved, and convenient repair and replacement of test probes are achieved, improving the safety and efficiency of testing.
Patent Information
- Application Number
- CN202520490346.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing PCB testing fixtures are prone to damaging PCB boards during testing, and the repair and replacement of test probes are inconvenient.
A precision composite PCB test fixture was designed, which adopts a buffer structure and detachable test probes. The buffer structure prevents the contact rod from directly impacting and damaging the PCB board, and the slider facilitates the maintenance and replacement of the test probes.
It effectively protects the PCB board from damage, while facilitating the repair and replacement of test probes, thus improving the safety and efficiency of testing.
Smart Images
Figure CN223955656U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a circuit board test fixture technical field, specifically a kind of precision composite PCB test fixture. BACKGROUND
[0002] PCB board Chinese name is printed circuit board, also called printed circuit board, printed circuit board, is important electronic component, and the quality of PCB largely determines the quality of electronic components, so in the process of producing PCB board, detection is a very important link, and through detection, usually can find the open circuit, short circuit and other functional defects that are not easy to find visually.
[0003] In the detection process of PCB board, it is generally pressed by contact lever to PCB board, and then PCB board and test needle are contacted to detect, however, when pressing PCB board, the bottom end of contact lever is directly contacted with PCB board, and the surface of PCB board is provided with more lines, so that the downward pressing of contact lever can easily cause impact damage to PCB board, and when downward pressing for testing, since the back of PCB board is also provided with more lines, the impact of placing plate and PCB board back during pressing by contact lever can also easily cause damage to the back of PCB board, and the test needle for testing PCB board is not convenient to maintain and replace when it needs to be maintained and replaced. UTILITY MODEL CONTENTS
[0004] Therefore, the present scheme provides a kind of precision composite PCB test fixture, which can prevent damage to PCB board during testing, and also facilitate maintenance and replacement of test needle.
[0005] The technical scheme for solving the above technical problems of the utility model is as follows:
[0006] The precision composite PCB test fixture comprises a workbench, a fixed frame is installed at the top end of the workbench, a guide rod is fixedly connected between the workbench and the fixed frame, a pressing plate is slidably connected to the guide rod, a clamping device is installed on the fixed frame, the bottom end of the clamping device is fixedly connected to the pressing plate, a placing plate is installed at the top end of the workbench, a buffer structure is installed on the pressing plate, the buffer structure comprises a sliding rod, the sliding rod is slidably connected inside the pressing plate, a contact lever is detachably connected to the bottom end of the sliding rod, a fixed ring is fixedly connected to the top end of the sliding rod, a first spring is fixedly connected between the pressing plate and the fixed ring, a second spring is fixedly connected between the pressing plate and the workbench, a sliding block is slidably connected to the top end of the workbench, and a detachable test needle is installed on the sliding block.
[0007] Optionally, in an embodiment of the utility model, the guide rod is arranged in parallel and symmetrically, and the placing plate and the workbench are in parallel.
[0008] Optionally, in an embodiment of the utility model, the slide bar and the contact rod are provided with multiple, the contact rod is soft rubber material.
[0009] Optionally, in an embodiment of the utility model, the workbench is installed with the limiting structure, the limiting structure includes fixed column, the fixed column is fixedly connected at the bottom end of the placing plate, and the fixed column and the workbench are slidingly connected.
[0010] Optionally, in an embodiment of the utility model, the workbench top is rectangular array relation and is connected with multiple limiting bolts, and the limiting bolt and the placing plate contact.
[0011] Optionally, in an embodiment of the utility model, the placing plate is fixedly connected with multiple limiting columns, and the limiting column and the PCB board are inserted.
[0012] Optionally, in an embodiment of the utility model, the placing plate front end and rear end are provided with recess, and the recess is horn structure.
[0013] Optionally, in an embodiment of the utility model, the sliding block both ends are fixedly connected with limiting block, and the limiting block and the workbench are slidingly connected.
[0014] Optionally, in an embodiment of the utility model, the slide bar is fixedly connected with limiting ring, and the limiting ring and the pressing plate are slidingly connected.
[0015] Optionally, in an embodiment of the utility model, the contact rod top is fixedly connected with the plug rod, the plug rod and the slide bar are inserted, and the plug rod is rubber material.
[0016] The utility model discloses the beneficial effects are:
[0017] The utility model provides a kind of precision composite PCB test fixture, test, PCB board is placed in placing plate, then pull down clamping device, by clamping device can drive pressing plate on guide rod and slide down, after contact rod contacts PCB board, by the buffering of first spring, it can prevent contact rod directly impacting and damaging PCB board, therefore, it can prevent contact rod from damaging PCB board, by the buffering of second spring, it can prevent placing plate from damaging the back of PCB board when contact rod contacts PCB board, therefore, it can well protect PCB board, when test needle and PCB board contact, PCB board can be tested, when test needle needs to be overhauled, slide out slider, so as to facilitate the replacement and maintenance of test needle, therefore, not only can prevent PCB board from being damaged when testing PCB board, but also facilitate the maintenance and replacement of test needle. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 It is the overall structure schematic view of the embodiment 1 of the present application.
[0020] Figure 2 It is the overall structure schematic view of the embodiment 1 of the present application. Figure 1 It is the enlarged structure schematic view of A part shown in the figure.
[0021] Figure 3 It is the enlarged structure schematic view of B part shown in the figure. Figure 1 It is the enlarged structure schematic view of B part shown in the figure.
[0022] Figure 4 It is the connection structure schematic view of the slide rod and the limiting ring of the embodiment 1 of the present application.
[0023] Figure 5 It is the overall structure schematic view of the limiting block of the embodiment 1 of the present application.
[0024] The drawings are as follows: workbench 1, fixed frame 2, guide rod 3, pressing plate 4, placing plate 5, buffer structure 6, slide rod 601, abutting rod 602, fixed ring 603, first spring 604, second spring 605, slide block 606, test needle 607, limiting structure 7, fixed column 701, limiting bolt 702, limiting column 703, groove 704, limiting block 705, limiting ring 706, plug rod 707, clamping device 8. DETAILED DESCRIPTION
[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions of the present application will be further described below in combination with the drawings of the embodiments of the present application. The present application is not limited to the following specific embodiments.
[0026] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts. In the description of the present application, it should be understood that if the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0027] Embodiment 1
[0028] The existing test fixture is easy to damage the PCB, therefore, a precision composite PCB test fixture is designed, the specific scheme is as follows:
[0029] As shown in Figures 1-5 , the precision composite PCB test fixture comprises a workbench 1, a fixed frame 2 is installed at the top end of the workbench 1, a guide rod 3 is fixedly connected between the workbench 1 and the fixed frame 2, a pressing plate 4 is slidably connected on the guide rod 3, a clamping device 8 is installed on the fixed frame 2, the bottom end of the clamping device 8 is fixedly connected with the pressing plate 4, a placing plate 5 is installed at the top end of the workbench 1, a buffer structure 6 is installed on the pressing plate 4, the buffer structure 6 comprises a sliding rod 601, the sliding rod 601 is slidably connected inside the pressing plate 4, a contact rod 602 is detachably connected at the bottom end of the sliding rod 601, a fixed ring 603 is fixedly connected at the top end of the sliding rod 601, a first spring 604 is fixedly connected between the pressing plate 4 and the fixed ring 603, a second spring 605 is fixedly connected between the pressing plate 4 and the workbench 1, a sliding block 606 is slidably connected at the top end of the workbench 1, a test needle 607 is installed on the sliding block 606, in this embodiment, a test instrument is integrated in the workbench 1, the front side of the workbench 1 is a control panel, the test can be completed by controlling the control panel, in other schemes, the workbench 1 is only used as a base, the test needle 607 is electrically connected with an external test instrument, and the test of the PCB is completed by operating the test instrument.
[0030] As shown in Figure 1 , the guide rod 3 is arranged in parallel and symmetrically, in this embodiment, two guide rods 3 are arranged, the placing plate 5 and the workbench 1 are in parallel, so that the pressing plate 4 can be guided.
[0031] As shown in Figure 3 , 4 , the sliding rod 601 and the contact rod 602 are provided in plurality, the contact rod 602 is made of soft rubber material, so that damage to the PCB caused by the contact rod 602 can be prevented.
[0032] AsFigure 1 As shown, the workbench 1 is mounted with a limiting structure 7, the limiting structure 7 comprises a fixed column 701, the bottom end of the placing plate 5 is fixedly connected with the fixed column 701, the fixed column 701 and the workbench 1 are slidingly connected, the placing plate 5 can be guided through the fixed column 701, so that the placing plate 5 will not be deviated when the height of the placing plate 5 is adjusted.
[0033] As shown in the figure, Figure 1 The top end of the workbench 1 is screw-connected with a plurality of limiting bolts 702 in a rectangular array relationship, the limiting bolts 702 abut against the placing plate 5, and the placing plate 5 can be kept at a fixed horizontal height through the limiting bolts 702.
[0034] As shown in the figure, Figure 2 , 3 The placing plate 5 is fixedly connected with a plurality of limiting columns 703, the limiting columns 703 and the PCB board are inserted, and the PCB board can be positioned and placed through the limiting columns 703.
[0035] As shown in the figure, Figure 2 The front end and the rear end of the placing plate 5 are both provided with a groove 704, the groove 704 is a horn-shaped structure, and the operator can take out or put in the PCB board from the placing plate 5 through the groove 704.
[0036] As shown in the figure, Figure 2 The both ends of the sliding block 606 are fixedly connected with a limiting block 705, the limiting block 705 and the workbench 1 are slidingly connected, the sliding block 606 can be limited through the limiting block 705, and the limiting block 705 is made of rubber material and can play a certain buffering role.
[0037] As shown in the figure, Figure 4 The limiting ring 706 and the pressing plate 4 are slidingly connected, the limiting ring 706 slides inside the pressing plate 4, the pressing plate 4 is provided with a cavity, and the sliding stroke of the limiting ring 706, i.e. the extension and contraction of the sliding rod 601, can limit the sliding of the sliding rod 601.
[0038] As shown in the figure, Figure 4 The top end of the abutting rod 602 is fixedly connected with a plug rod 707, the plug rod 707 and the sliding rod 601 are inserted, the plug rod 707 is made of rubber material, and the abutting rod 602 can be positioned through the plug rod 707 after the plug rod 707 is inserted into the sliding rod 601.
[0039] Usage:
[0040] When the PCB is tested, the PCB is first placed in the placing plate 5, then the clamping device 8 is pulled down, the pressing plate 4 is driven to slide down on the guide rod 3, after the abutting rod 602 abuts against the PCB, the first spring 604 fixed between the fixed ring 603 and the pressing plate 4 can prevent the abutting rod 602 from damaging the PCB, the second spring 605 fixed between the placing plate 5 and the workbench 1 can prevent the placing plate 5 from damaging the PCB, thus the PCB can be well protected.
[0041] When the test needle 607 abuts against the PCB, the PCB can be tested, when the test needle 607 needs to be maintained and repaired, the sliding block 606 is slid outward, thus the test needle 607 can be conveniently replaced and repaired, thus not only can the PCB be prevented from being damaged when the PCB is tested, but also the test needle 607 can be conveniently repaired and replaced, the placing plate 5 can be guided by the fixed column 701, the placing plate 5 can be limited by the limiting bolt 702, the PCB can be positioned by the limiting column 703, the PCB can be taken out from the placing plate 5 by the recess 704, the sliding block 606 can be limited by the limiting block 705, the limiting block 705 is made of rubber, the sliding rod 601 can be limited by the limiting ring 706, the abutting rod 602 can be positioned after the insertion rod 707 is inserted into the sliding rod 601.
[0042] Embodiment 2
[0043] In the embodiment, the structure of the test fixture is basically same as that of the embodiment 1, the difference is that the test needle is also arranged on the pressing plate 4, for testing the upper layer circuit of the PCB, and the test needle structure is same as that of the embodiment 1, which can be used for testing the upper and lower double sides of the double layer or composite PCB at the same time, improving the test efficiency.
[0044] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A precision composite PCB test fixture, characterized in that, Include: Workbench, the workbench top is equipped with fixed frame, the workbench and fixed frame are fixedly connected with guide rod, the guide rod is slidably connected with the pressing plate, the fixed frame is installed with the clamping device, the clamping device bottom and the pressing plate are fixedly connected, the workbench top is installed with the placement plate, characterized by: the pressing plate is installed with buffer structure, the buffer structure includes slide rod, the slide rod is slidably connected in the pressing plate, the slide rod bottom is detachably connected with the resistance rod, the slide rod top is fixedly connected with the fixed ring, the pressing plate and fixed ring are fixedly connected with the first spring, the pressing plate and workbench are fixedly connected with the second spring, the workbench top is slidably connected with the sliding block, the sliding block is installed with the detachable test needle.
2. The precision compound PCB test fixture of claim 1, wherein: The guide rod is parallel and symmetrically arranged, and the placement plate and the workbench are in parallel relationship.
3. The precision compound PCB test fixture of claim 1, wherein: The slide rod and the resistance rod are provided with a plurality of, the resistance rod is soft rubber material.
4. The precision compound PCB test fixture of claim 1, wherein: The workbench is installed with a limiting structure, the limiting structure includes a fixed column, the placement plate bottom is fixedly connected with the fixed column, and the fixed column and the workbench are slidably connected.
5. The precision compound PCB test fixture of claim 1, wherein: The workbench top is screw-connected with a plurality of limiting bolts in rectangular array relationship, and the limiting bolt and the placement plate are in contact.
6. The precision compound PCB test fixture of claim 1, wherein: The placement plate is fixedly connected with a plurality of limiting columns, and the limiting column and the PCB board are inserted.
7. The precision compound PCB test fixture of claim 1, wherein: The front end and the rear end of the placement plate are provided with grooves, and the grooves are in horn structure.
8. The precision compound PCB test fixture of claim 1, wherein: The both ends of the sliding block are fixedly connected with the limiting block, and the limiting block and the workbench are slidably connected.
9. The precision compound PCB test fixture of claim 1, wherein: The slide rod is fixedly connected with the limiting ring, and the limiting ring and the pressing plate are slidably connected.
10. The precision compound PCB test fixture of claim 1, wherein: The top end of the resistance rod is fixedly connected with the insertion rod, the insertion rod and the slide rod are inserted, and the insertion rod is rubber material.