Automatic limiting mechanism for expanded PCB

Abstract

The utility model discloses an automatic limiting mechanism of expansion type PCB board, it includes: fixed base, first slide rail, second slide rail, expansion sleeve and pull rod, be provided with probe avoidance groove in fixed base, first slide rail transverse setting is in fixed base and is located probe avoidance groove both sides, is provided with first sliding block on first slide rail, second slide rail vertical setting is on first sliding block, is provided with second sliding block on second slide rail, is provided with mounting seat on second sliding block, is provided with the support corresponding with pull rod on mounting seat, pull rod vertical setting is in support, expansion sleeve concentric setting is on pull rod and is located the top of support, pull rod top is provided with the pressure head in expansion sleeve top, pull rod bottom is provided with floating plate, one side of mounting seat vertical setting is connected with the lifting drive mechanism of floating plate, can carry out the automatic limiting fixing of PCB board, has improved the position adaptability to the mounting hole on PCB board.

Description

Technical Field

[0001] This utility model relates to the field of probe station technology, and in particular to an expansion type PCB board automatic limiting mechanism. Background Technology

[0002] A probe station is needed to test the electrical parameters of circuits or transistors on a PCB. The probe station extends probes to designated locations on the PCB via a driver board, and the electrical parameters of the circuits or transistors are then tested using test instruments connected to the probes.

[0003] Before the probe station can perform testing, the PCB board needs to be fixed in place. Since the mounting hole positions on different batches of PCBs vary, this increases the difficulty of positioning the PCB board by the probe station. Furthermore, pressure blocks or plates are usually required to fix and secure the PCB board, which is cumbersome and can easily lead to pressure damage. Improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to provide an expansion-type PCB board automatic limiting mechanism for automatic limiting and fixing of PCB boards, thereby improving the adaptability to the position of mounting holes on different batches of PCB boards.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An expansion-type automatic limiting mechanism for a PCB board includes: a fixed base, a first slide rail, a second slide rail, an expansion sleeve, and a pull rod. The fixed base has a probe clearance groove. The first slide rail is horizontally disposed in the fixed base and located on both sides of the probe clearance groove. A first slider is disposed on the first slide rail. The second slide rail is vertically disposed on the first slider. A second slider is disposed on the second slide rail. A mounting base is disposed on the second slider. A bracket corresponding to the pull rod is disposed on the mounting base. The pull rod is vertically disposed in the bracket. The expansion sleeve is concentrically disposed on the pull rod and located above the bracket. A pressure head is disposed at the top of the pull rod and located at the top of the expansion sleeve. A floating plate is disposed at the bottom of the pull rod. A lifting drive mechanism connected to the floating plate is vertically disposed on one side of the mounting base.

[0007] The first slider is provided with a first fastening screw pointing to the first slide rail.

[0008] The second slider is provided with a second fastening screw that points to the second slide rail.

[0009] The bracket adopts a right-angle bent plate structure.

[0010] The pressure head has a cylindrical structure, and its diameter corresponds to the outer diameter of the expansion sleeve.

[0011] The top of the pressure head is chamfered.

[0012] The lifting drive mechanism is a cylinder.

[0013] The expansion sleeve is made of elastic rubber, and the PCB board is provided with mounting holes, the diameter of which corresponds to the outer diameter of the expansion sleeve.

[0014] The beneficial effects of this utility model are as follows: An expansion-type automatic PCB board limiting mechanism uses a pull rod to engage with the mounting holes on the PCB board for rapid positioning. The expansion sleeve is pressed down and expanded by a pressure head to limit and fix the PCB board, preventing loosening and improving stability during probe detection. Furthermore, the position of the pull rod can be changed by moving the first and second sliders, improving adaptability to the position of the mounting holes on the PCB board. This makes it widely applicable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A magnified view of part A in the middle. Detailed Implementation

[0017] The following is combined with Figures 1-2 The technical solution of this utility model will be further illustrated through specific embodiments.

[0018] like Figure 1 and Figure 2 The expansion-type PCB board automatic limiting mechanism shown is used for limiting and fixing the PCB board 2. It includes: a fixing base 1, a first slide rail 9, a second slide rail 10, an expansion sleeve 16, and a pull rod 14. The fixing base 1 is provided with a probe clearance groove 3, which facilitates the insertion of the probe into the fixing base 1 through the probe clearance groove 3 to detect the electrical parameters of the circuit or transistor core at a specified position on the PCB board.

[0019] The first slide rail 9 is horizontally positioned in the fixed base 1 and located on both sides of the probe clearance groove 3. A first slider 11 is provided on the first slide rail 9, and the first slider 11 can slide horizontally to adjust the horizontal position of the pull rod 14. In this embodiment, a first fastening screw 8 is provided on the first slider 11, pointing towards the first slide rail 9, to fix the first slider 11 after adjustment.

[0020] The second slide rail 10 is longitudinally mounted on the first slider 11, and a second slider 12 is mounted on the second slide rail 10. Mounting holes 18 are provided on the PCB board. By sliding the second slider 12 longitudinally on the second slide rail 10, the longitudinal position of the pull rod 14 can be adjusted, improving adaptability to the position of the mounting holes on the PCB board. A second fastening screw 6 is provided on the second slider 12, pointing towards the second slide rail. The second fastening screw 6 secures the adjusted second slider 12, making operation simple and providing high stability.

[0021] A mounting base 4 is provided on the second slider 12, such as Figure 2 As shown, the mounting base 4 is provided with a bracket 13 corresponding to the pull rod 14. The pull rod 14 is vertically arranged in the bracket 13. The bracket 14 adopts a right-angle bent plate structure. The bracket 14 is provided with a guide hole corresponding to the pull rod 14 to realize the vertical movement guidance of the pull rod 14.

[0022] The expansion sleeve 16 is concentrically mounted on the pull rod 14 and positioned above the bracket 13. The expansion sleeve 16 is made of elastic rubber and can expand under pressure. The diameter of the mounting hole 18 corresponds to the outer diameter of the expansion sleeve 16. The PCB board 2 is placed in the fixing base 1, and the PCB board 2 is positioned by inserting the pull rod 14 and the expansion sleeve 16 into the mounting hole 18. The bottom of the PCB board 2 contacts the bracket 13, which supports the PCB board 2.

[0023] A pressure head 5 is provided at the top of the pull rod 14, located at the top of the expansion sleeve 16. The top of the pressure head 5 has a chamfer 17 to facilitate the penetration of the mounting hole 18, improving the ease of placing the PCB board 2. In this embodiment, the pressure head 5 adopts a cylindrical structure, and the diameter of the pressure head 5 corresponds to the outer diameter of the expansion sleeve 16. The pressure head 5 is connected to the pull rod 14 by welding or threading. The pull rod 14 pulls down the pressure head 5 to press down and expand the expansion sleeve 16, thereby limiting and fixing the PCB board 2, preventing loosening during the testing process, and ensuring high stability.

[0024] like Figure 2 As shown, a floating plate 15 is provided at the bottom of the pull rod 14, and a lifting drive mechanism 7 connected to the floating plate 15 is vertically provided on one side of the mounting base 4. In this embodiment, the lifting drive mechanism 7 is a cylinder, and the extension and retraction of the cylinder can be controlled by a PLC to realize the lifting drive of the floating plate 15. The lifting and retraction of the pull rod 14 driven by the floating plate 15 realizes the downward expansion and reset of the expansion sleeve 16, which is easy to operate.

[0025] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An expansion-type automatic limiting mechanism for PCB boards, used for limiting and fixing PCB boards, characterized in that, include: The device comprises a fixed base, a first slide rail, a second slide rail, an expansion sleeve, and a pull rod. The fixed base has a probe clearance groove. The first slide rail is horizontally disposed in the fixed base and located on both sides of the probe clearance groove. A first slider is disposed on the first slide rail. The second slide rail is vertically disposed on the first slider. A second slider is disposed on the second slide rail. A mounting base is disposed on the second slider. A bracket corresponding to the pull rod is disposed on the mounting base. The pull rod is vertically disposed in the bracket. The expansion sleeve is concentrically disposed on the pull rod and located above the bracket. A pressure head is disposed at the top of the pull rod and located at the top of the expansion sleeve. A floating plate is disposed at the bottom of the pull rod. A lifting drive mechanism connected to the floating plate is vertically disposed on one side of the mounting base.

2. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The first slider is provided with a first fastening screw pointing to the first slide rail.

3. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The second slider is provided with a second fastening screw that points to the second slide rail.

4. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The bracket adopts a right-angle bent plate structure.

5. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The pressure head has a cylindrical structure, and the diameter of the pressure head corresponds to the outer diameter of the expansion sleeve.

6. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The top of the pressure head is chamfered.

7. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The lifting drive mechanism uses a cylinder.

8. The expansion-type PCB board automatic limiting mechanism according to claim 1, characterized in that, The expansion sleeve is made of elastic rubber, and the PCB board is provided with mounting holes, the diameter of which corresponds to the outer diameter of the expansion sleeve.

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