PCB testing fixture

Abstract

The utility model discloses a PCB board test fixture, include: test frame is equipped with the tooling fixture for placing PCB board on the test frame, the tooling fixture passes through fixed assembly and is fixedly connected with test frame, the upper portion of tooling fixture is equipped with the down pressure subassembly, the down pressure subassembly passes through guide component and is connected with test frame sliding, and the upper portion of down pressure subassembly still is connected with drive mechanism, wherein, the down pressure subassembly includes the pressing plate and spring pressure stick, spring pressure stick sets up the lower surface of pressing plate, and the down pressure is applied to PCB board. The utility model discloses drive mechanism and make down pressure subassembly exert pressure on the PCB board on tooling fixture, realize automatic to PCB board and test, and the setting of fixed assembly can carry out quick replacement, fixed to tooling fixture, improve the test efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of testing, and in particular relates to a PCB board testing fixture. Background Technology

[0002] PCB board testing fixtures are specialized equipment used to test the performance of PCB boards. They can test various performance parameters of the circuit board, such as continuity, current, voltage, and pressure, to ensure the quality and reliability of the circuit board. In the field of electronics manufacturing, it is an important tool to ensure the quality and reliability of circuit boards. By simulating the actual working environment, the testing fixture can perform rigorous testing on the circuit board, thereby identifying problems in a timely manner during the production process.

[0003] For example, application number CN202120256223.X discloses a PCB board testing fixture, including a fixture body, a vertical plate, a pressure plate, and a pressure plate driving mechanism. The top surface of the fixture body has a PCB board receiving slot for accommodating the PCB board to be tested, and the PCB board receiving slot has at least one probe insertion hole. The vertical plate is fixedly installed on the top surface of the fixture body, and the pressure plate is slidably connected to the vertical plate. The pressure plate driving mechanism is fixedly installed on the vertical plate, and its output end is fixedly connected to the pressure plate to drive the pressure plate to press the PCB board to be tested placed in the PCB board receiving slot. At least one electrical signal input device is installed on the fixture body, and each electrical signal input device is connected to a probe via a wire. The probe is inserted into the probe insertion hole from one side of the bottom surface of the fixture body. This solution has a simple structure and can test PCB boards, but manual pressing is required when pressing down, and the fixture can only test one type of PCB board, making rapid model changeover impossible and affecting testing efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a PCB board testing fixture that can automatically test PCB boards and allows for quick replacement of the fixture, thereby improving testing efficiency.

[0005] Specifically, this utility model discloses a PCB board testing fixture, comprising:

[0006] A test rack is provided with a fixture for placing PCB boards, and the fixture is fixedly connected to the test rack by a fixing component;

[0007] A pressing component is provided above the tooling fixture. The pressing component is slidably connected to the test frame through a guide component, and a driving mechanism is also connected above the pressing component.

[0008] The pressing assembly includes a pressure plate and a spring bar. The spring bar is located on the lower surface of the pressure plate and applies downward pressure to the PCB board.

[0009] Furthermore, the spring pressure rod includes a pressure rod sleeve and a pressure rod core. The pressure rod core penetrates the pressure rod sleeve. A pressure rod end cap is also provided above the pressure rod sleeve. The pressure rod end cap is threadedly connected to the pressure rod sleeve, and a pressure spring is also provided between the pressure rod end cap and the pressure rod core.

[0010] Furthermore, the longitudinal section of the pressure rod sleeve is U-shaped, the longitudinal section of the pressure rod core is T-shaped, and the inner diameter of the pressure rod sleeve matches the outer diameter of the pressure rod core.

[0011] Furthermore, the tooling fixture includes an upper support plate and a lower support plate, which are connected by a guide pin, and the guide pin has a return spring on its outside.

[0012] Furthermore, the upper support plate is provided with positioning guide posts for restricting the movement of the PCB board, and the lower support plate is provided with probes for contacting the PCB board, with wires connected to the bottom of the probes.

[0013] Furthermore, the fixing assembly includes a fixing cylinder, a hinge, and a flip plate. The hinge is fixedly connected to the test frame, the fixing cylinder is connected to the test frame and is disposed on one side of the flip plate, and the flip plate is fixedly connected to the hinge's pivot.

[0014] Furthermore, the longitudinal section of the flip plate is V-shaped.

[0015] Furthermore, a fixing groove is provided on one side of the lower support plate, and the width of the fixing groove matches the width of the flip plate.

[0016] Furthermore, the guiding assembly includes a guide post and a guide sleeve, and the pressure plate is slidably connected to the guide post through the guide sleeve.

[0017] Furthermore, the driving mechanism is a servo electric cylinder.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention can automatically test PCB boards and quickly replace and fix tooling fixtures, thus improving testing efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0021] Figure 1 This is a schematic diagram of a PCB board testing fixture;

[0022] Figure 2 This is a magnified view of a portion of the upper support plate;

[0023] Figure 3 This is a test diagram of a PCB board test fixture;

[0024] Figure 4 This is a half-section view of the PCB board testing fixture;

[0025] Figure 5 This is a schematic diagram of the test frame and tooling fixtures;

[0026] Figure 6 This is a cross-sectional view of the spring compression rod.

[0027] The reference numerals in the attached drawings are as follows: test frame 1, tooling fixture 2, upper support plate 21, lower support plate 22, guide pin 23, return spring 24, positioning guide post 25, probe 26, fixing groove 27, fixing assembly 3, fixing cylinder 31, hinge 32, flip plate 33, pressing assembly 4, pressure plate 41, spring pressure rod 42, pressure rod sleeve 421, pressure rod core 422, pressure rod end cap 423, pressure spring 424, guide assembly 5, guide post 51, guide sleeve 52, drive mechanism 6. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] like Figure 1-6 As shown, this utility model discloses a PCB board testing fixture, comprising:

[0030] Test rack 1, the test rack 1 is provided with tooling fixture 2 for placing PCB board, the tooling fixture 2 is fixedly connected to the test rack 1 through fixing component 3;

[0031] A pressing component 4 is provided above the tooling fixture 2. The pressing component 4 is slidably connected to the test frame 1 through the guide component 5, and a drive mechanism 6 is also connected above the pressing component 4.

[0032] The pressing assembly 4 includes a pressure plate 41 and a spring bar 42. The spring bar 42 is located on the lower surface of the pressure plate 41 and applies downward pressure to the PCB board.

[0033] This utility model uses a drive mechanism 6 to apply pressure to the PCB board on the tooling fixture 2 by the pressing component 4, so as to realize automatic testing of the PCB board. The setting of the fixing component 3 can quickly replace and fix the tooling fixture 2, thereby improving the testing efficiency.

[0034] Among them, the drive mechanism 6 is a servo electric cylinder. Servo electric cylinders have high motion precision, simple structure, and are easy to maintain.

[0035] In some embodiments of this utility model, the spring pressure rod 42 includes a pressure rod sleeve 421 and a pressure rod core 422. The pressure rod core 422 passes through the pressure rod sleeve 421. A pressure rod end cap 423 is also provided above the pressure rod sleeve 421. The pressure rod end cap 423 is threadedly connected to the pressure rod sleeve 421, and a pressure spring 424 is provided between the pressure rod end cap 423 and the pressure rod core 422. The spring pressure rod 42 can avoid rigid impact on the PCB board and damage to the PCB board. In addition, an insulating pad can be provided at the bottom end of the pressure rod core 422 to prevent electrostatic discharge from damaging the electronic components on the PCB board.

[0036] The longitudinal section of the pressure rod sleeve 421 is U-shaped, the longitudinal section of the pressure rod core 422 is T-shaped, and the inner diameter of the pressure rod sleeve 421 matches the outer diameter of the pressure rod core 422.

[0037] In some embodiments of this utility model, the tooling fixture 2 includes an upper support plate 21 and a lower support plate 22. The upper support plate 21 and the lower support plate 22 are connected by a guide pin 23, and the guide pin 23 has a return spring 24 on its outside. The upper support plate 21 moves downward along the guide pin 23. The upper support plate 21 is provided with a positioning guide post 25 for limiting the movement of the PCB board, and the lower support plate 22 is provided with a probe 26 for contacting the PCB board. The bottom of the probe 26 is connected to a wire (not shown). When the PCB board is placed on the positioning guide post 25, the spring pressure bar 42 applies pressure to the PCB board on the upper support plate 21, causing the upper support plate 21 to move downward along the positioning guide post 25, so that the pads on the bottom surface of the PCB board contact the probe 26, and the PCB board is functionally tested.

[0038] In some embodiments of this utility model, the fixing component 3 includes a fixing cylinder 31, a hinge 32, and a flipping plate 33. The hinge 32 is fixedly connected to the test frame 1, and the fixing cylinder 31 is connected to the test frame 1 and located on one side of the flipping plate 33. The flipping plate 33 is fixedly connected to the rotating shaft (not shown) of the hinge 32. The flipping plate 33 has a V-shaped longitudinal section, and a fixing groove 27 is provided on one side of the lower support plate 22. The width of the fixing groove 27 matches the width of the flipping plate 33. When installing the tooling fixture 2, the installation fixture is placed in the installation position, and then the flipping plate 33 is moved to rotate the rotating shaft around the hinge 32, causing one end of the flipping plate 33 to be inserted into the fixing groove 27. Then, the fixing cylinder 31 extends and abuts against the flipping plate 33, thereby fixing the tooling fixture 2.

[0039] In some embodiments of this utility model, the guide assembly 5 includes a guide post 51 and a guide sleeve 52, and the pressure plate 41 is slidably connected to the guide post 51 through the guide sleeve 52. The arrangement of the guide post 51 and the guide sleeve 52 facilitates the movement of the pressing assembly 4 and improves the docking accuracy between the pressing assembly 4 and the tooling fixture 2.

[0040] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A PCB board testing fixture, characterized in that, include: A test rack (1) is provided with a fixture (2) for placing PCB boards. The fixture (2) is fixedly connected to the test rack (1) by a fixing component (3). The tooling fixture (2) is provided with a pressing component (4) above it. The pressing component (4) is slidably connected to the test frame (1) through a guide component (5). A driving mechanism (6) is also connected above the pressing component (4). The pressing assembly (4) includes a pressure plate (41) and a spring bar (42). The spring bar (42) is located on the lower surface of the pressure plate (41) and applies downward pressure to the PCB board.

2. The PCB board testing fixture according to claim 1, characterized in that, The spring pressure bar (42) includes a pressure bar sleeve (421) and a pressure bar core (422). The pressure bar core (422) passes through the pressure bar sleeve (421). A pressure bar end cap (423) is also provided above the pressure bar sleeve (421). The pressure bar end cap (423) is threadedly connected to the pressure bar sleeve (421). A pressure spring (424) is also provided between the pressure bar end cap (423) and the pressure bar core (422).

3. The PCB board testing fixture according to claim 2, characterized in that, The longitudinal section of the pressure bar sleeve (421) is U-shaped, and the longitudinal section of the pressure bar core (422) is T-shaped. The inner diameter of the pressure bar sleeve (421) matches the outer diameter of the pressure bar core (422).

4. The PCB board testing fixture according to claim 1, characterized in that, The tooling fixture (2) includes an upper support plate (21) and a lower support plate (22). The upper support plate (21) and the lower support plate (22) are connected by a guide pin (23), and the guide pin (23) has a return spring (24) on its outside.

5. The PCB board testing fixture according to claim 4, characterized in that, The upper support plate (21) is provided with positioning guide posts (25) for restricting the movement of the PCB board, and the lower support plate (22) is provided with probes (26) for contacting the PCB board, and the bottom of the probes (26) is connected with wires.

6. The PCB board testing fixture according to claim 5, characterized in that, The fixing component (3) includes a fixing cylinder (31), a hinge (32) and a flip plate (33). The hinge (32) is fixedly connected to the test frame (1). The fixing cylinder (31) is connected to the test frame (1) and is located on one side of the flip plate (33). The flip plate (33) is fixedly connected to the pivot of the hinge (32).

7. The PCB board testing fixture according to claim 6, characterized in that, The longitudinal section of the flip plate (33) is V-shaped.

8. The PCB board testing fixture according to claim 7, characterized in that, The lower support plate (22) has a fixing groove (27) on one side, and the width of the fixing groove (27) matches the width of the flip plate (33).

9. The PCB board testing fixture according to claim 1, characterized in that, The guide assembly (5) includes a guide post (51) and a guide sleeve (52), and the pressure plate (41) is slidably connected to the guide post (51) through the guide sleeve (52).

10. The PCB board testing fixture according to claim 1, characterized in that, The drive mechanism (6) is a servo electric cylinder.

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