Pressure adjusting device for PCB (Printed Circuit Board) test fixture

Abstract

The utility model relates to the technical field of circuit board manufacturing engineering, and discloses a pressure adjusting device for a PCB (printed circuit board) test fixture, which comprises a top plate, an air cylinder is fixedly connected to the outer wall of the top plate, a pressure rod is fixedly connected to the output end of the air cylinder, a pressing plate is slidably connected to the bottom end of the pressure rod, a second sliding groove is formed in the pressure rod, and the second sliding groove is communicated with the pressure rod. And one end of each third spring is fixedly connected with a pushing block, the outer wall of each pushing block is slidably connected to the inner wall of the corresponding clamping shell, the outer wall of each pushing block is slidably connected to the outer wall of the corresponding clamping block, the outer wall of each clamping block is slidably connected to the interior of the corresponding second sliding groove, and a mounting assembly is arranged on the lower surface of the top plate. According to the quick mounting and dismounting device, when a clamping shell is inserted into a first sliding groove and a second sliding groove, a handle is rotated to drive a first threaded rod to extrude a clamping block out of the clamping shell and clamp the clamping block into the second sliding groove through a third spring and a push block, and the effect of quickly mounting and dismounting the pressing plate in the using process is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board manufacturing engineering, in particular to a pressure regulating device for a PCB board testing fixture. Background Art

[0002] A PCB test fixture is a device designed specifically for testing printed circuit boards (PCBs). It plays a key role in the electronics manufacturing and testing process to ensure the functionality, performance, and quality of the circuit boards. The size and thickness of PCB boards may vary greatly. The clamping pressure of the test fixture can be adjusted using a pressure regulator to ensure a stable clamping force when testing circuit boards of different sizes and thicknesses. This helps prevent movement or instability of the circuit board during testing and ensures a reliable electrical connection.

[0003] However, most pressure devices do not have the effect of regulating pressure during use. Therefore, during use, the tested PCB board may be broken due to excessive pressure or the PCB board may be deformed due to excessive pressure. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a PCB board test fixture pressure regulating device, which aims to improve the problem that the tested PCB board may be broken due to excessive pressure or the PCB board may be deformed due to excessive pressure during use.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, and the plurality of springs are provided with a plurality of springs, each of which is provided with a plurality of springs.

[0007] Preferably, the mounting assembly includes a mounting plate, the upper surface of the mounting plate is fixedly connected to the lower surface of the top plate, the lower surface of the mounting plate is fixedly connected to a leg, a third slide groove is opened inside the mounting plate, the upper surface of the mounting plate is slidably connected to a slide box, the lower surface of the slide box is fixedly connected to a slide bar, and the outer wall of the slide bar is slidably connected to the inside of the third slide groove.

[0008] Preferably, an air pipe is fixedly connected to the outer wall of the top plate, a closing valve is fixedly connected to the inner wall of the air pipe, and a valve housing is fixedly connected to the outer wall of the air pipe.

[0009] Preferably, the inner wall of the valve housing is threadedly connected to a second threaded rod, the top end of the second threaded rod is fixedly connected to a turntable, and the outer wall of the second threaded rod is fixedly connected to a baffle.

[0010] Preferably, the outer wall of the baffle is slidably connected to the inner wall of the valve housing, the outer wall of the air pipe is fixedly connected to a first spring, and one end of the first spring is fixedly connected to the lower surface of the baffle.

[0011] Preferably, the bottom end of the second threaded rod is slidably connected to a sealing plug, the outer wall of the second threaded rod is slidably connected to the inner wall of the trachea, and the outer wall of the sealing plug is slidably connected to a ventilation shell.

[0012] Preferably, the outer wall of the ventilation shell is fixedly connected to the outer wall of the trachea, the inner wall of the ventilation shell is fixedly connected with a second spring, one end of the second spring is fixedly connected to the bottom end of the sealing plug, the outer wall of the sealing plug is slidably connected to the inner wall of the trachea, and the outer wall of the closing valve is slidably connected to the inner wall of the sealing plug.

[0013] Preferably, the top end of the air pipe is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to the rear of the cylinder, the bottom end of the air pipe is fixedly connected to an air compressor, and the outer wall of the air compressor is fixedly connected to the outer wall of the support leg.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, when the card shell is inserted into the first slide groove and the second slide groove, the handle is rotated to drive the first threaded rod to squeeze the third spring and the push block out of the card shell and into the second slide groove, so that the pressure plate can be quickly installed and disassembled during use.

[0016] 2. In the utility model, the first spring is compressed by rotating the turntable through the baffle plate, and the sealing plug is squeezed out from the inside of the air pipe through the second threaded rod during use. The second spring is squeezed by the sealing plug during use, and the closing valve slides out from the inner wall of the sealing plug to allow air to pass through. According to the size of the movement of the sealing plug, the air pressure can be adjusted during use, and the downward pressure of the cylinder can be adjusted during use.

[0017] 3. In the utility model, when the slide box drives the slide bar to slide into the third slide groove, the mold can be replaced according to the size of the PCB board during use, and the legs and the mounting plate provide support for the slide box during use, so that the slide box can be used more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a pressure regulating device for a PCB board test fixture proposed by the utility model;

[0019] Figure 2 This is a cross-sectional view of a pressure plate of a pressure regulating device for a PCB board test fixture proposed by the utility model;

[0020] Figure 3 A schematic diagram of a mounting plate of a PCB board test fixture pressure regulating device proposed by the utility model;

[0021] Figure 4 This is a cross-sectional view of an air pipe of a pressure regulating device for a PCB board test fixture proposed by the utility model.

[0022] Legend:

[0023] 1. Top plate; 2. Cylinder; 3. First slide groove; 4. Second slide groove; 5. Card shell; 6. Card block; 7. Push block; 8. Third spring; 9. Handle; 10. First threaded rod; 11. Pressure plate; 12. Mounting plate; 13. Leg; 14. Slide box; 15. Slide bar; 16. Third slide groove; 17. Air pipe; 18. Valve housing; 19. Second threaded rod; 20. Turntable; 21. Baffle; 22. First spring; 23. Close valve; 24. Sealing plug; 25. Vent shell; 26. Second spring; 27. Air compressor; 28. Connecting pipe; 29. ​​Pressure rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-3 The utility model provides an embodiment: a PCB board test fixture pressure regulating device, comprising a top plate 1, the outer wall of the top plate 1 is fixedly connected to a cylinder 2, the output end of the cylinder 2 is fixedly connected to a pressure rod 29, the bottom end of the pressure rod 29 is slidably connected to a pressing plate 11, the inside of the pressure rod 29 is provided with a second slide groove 4, the inside of the pressing plate 11 is provided with a first slide groove 3, the insides of the first slide groove 3 and the second slide groove 4 are both slidably connected to a card shell 5, a card block 6 is arranged inside the card shell 5, the inner wall of the card shell 5 is threadedly connected to a first threaded rod 10, the top end of the first threaded rod 10 is fixedly connected to a handle 9, and the bottom end of the first threaded rod 10 is fixedly connected to a third spring 8, One end of the third spring 8 is fixedly connected to a push block 7, the outer wall of the push block 7 is slidably connected to the inner wall of the card shell 5, the outer wall of the push block 7 is slidably connected to the outer wall of the card block 6, the outer wall of the card block 6 is slidably connected to the inside of the second slide groove 4, and a mounting assembly is provided on the lower surface of the top plate 1; the mounting assembly includes a mounting plate 12, the upper surface of the mounting plate 12 is fixedly connected to the lower surface of the top plate 1, the lower surface of the mounting plate 12 is fixedly connected to the support leg 13, the inside of the mounting plate 12 is provided with a third slide groove 16, the upper surface of the mounting plate 12 is slidably connected to the slide box 14, the lower surface of the slide box 14 is fixedly connected to the slide bar 15, and the outer wall of the slide bar 15 is slidably connected to the inside of the third slide groove 16;

[0026] Specifically, the card shell 5 can slide into the first slide groove 3 and the second slide groove 4 by turning the handle 9. At this time, the first threaded rod 10 rotates on the inner wall thread of the card shell 5, and the card block 6 is pushed out from the inside of the card shell 5 by the third spring 8 and the push block 7, and is stuck in the inside of the second slide groove 4. During use, the pressure plate 11 can be quickly replaced. During use, when the slide box 14 drives the slide bar 15 to slide into the inside of the third slide groove 16, the slide box 14 can be quickly replaced.

[0027] Reference Figure 4The outer wall of the top plate 1 is fixedly connected with an air pipe 17, the inner wall of the air pipe 17 is fixedly connected with a closing valve 23, and the outer wall of the air pipe 17 is fixedly connected with a valve housing 18; the inner wall of the valve housing 18 is threadedly connected with a second threaded rod 19, the top of the second threaded rod 19 is fixedly connected with a rotating disk 20, and the outer wall of the second threaded rod 19 is fixedly connected with a baffle 21; the outer wall of the baffle 21 is slidably connected to the inner wall of the valve housing 18, the outer wall of the air pipe 17 is fixedly connected with a first spring 22, one end of the first spring 22 is fixedly connected to the lower surface of the baffle 21 The bottom end of the second threaded rod 19 is slidably connected with a sealing plug 24, the outer wall of the second threaded rod 19 is slidably connected to the inner wall of the trachea 17, and the outer wall of the sealing plug 24 is slidably connected to a ventilation shell 25; the outer wall of the ventilation shell 25 is fixedly connected to the outer wall of the trachea 17, and the inner wall of the ventilation shell 25 is fixedly connected to a second spring 26, one end of the second spring 26 is fixedly connected to the bottom end of the sealing plug 24, the outer wall of the sealing plug 24 is slidably connected to the inner wall of the trachea 17, and the outer wall of the closing valve 23 is slidably connected to the inner wall of the sealing plug 24;

[0028] Specifically, when the turntable 20 drives the second threaded rod 19 to rotate on the inner wall of the valve housing 18, the first spring 22 is pressed downward through the baffle 21, and the sealing plug 24 is pushed out from the outer wall of the closed valve 23 through the second threaded rod 19. When the sealing plug 24 squeezes the second spring 26 downward and slides inside the vent shell 25, the air flow can pass through the gap between the sealing plug 24 and the closed valve 23. By adjusting the downward pressure of the sealing plug 24, the downward pressure of the cylinder 2 can be adjusted, and the effect of adjusting the downward pressure is achieved during use, which increases controllability.

[0029] Reference Figure 1 The top of the air pipe 17 is fixedly connected to a connecting pipe 28, one end of the connecting pipe 28 is fixedly connected to the rear of the cylinder 2, the bottom of the air pipe 17 is fixedly connected to an air compressor 27, and the outer wall of the air compressor 27 is fixedly connected to the outer wall of the leg 13;

[0030] Specifically, during use, the installation component can enhance the overall support and stability. During use, the air compressor 27 and the connecting pipe 28 can better deliver air to the interior of the cylinder 2 and the delivery pressure can be adjusted by rotating the turntable 20.

[0031] Working principle: When the device is needed, the PCB board can be fixed by placing it into the slide box 14 during use. The slide box 14 can be replaced according to the different sizes of PCB boards, and the legs 13 and the mounting plate 12 can provide a better support effect during use. During use, the first slide slot 3 and the second slide slot 4 can be inserted into the card shell 5 by sliding the handle 9. At this time, the first threaded rod 10 can be threadedly rotated on the inner wall of the card shell 5, and the card block 6 can be removed from the card shell 5 through the third spring 8 and the push block 7. The second spring 26 is pushed out from the inside of the valve housing 23 and is stuck in the inside of the second slide groove 4. During use, the pressure plate 11 can be quickly replaced because the clamp for the downward pressure test can be replaced according to the size of the PCB. During use, the second threaded rod 19 is driven to rotate on the inner wall of the valve housing 18 by rotating the turntable 20, and the first spring 22 is pressed down through the baffle 21. At this time, the sealing plug 24 is pushed out from the outer wall of the closed valve 23 by the second threaded rod 19. When the sealing plug 24 squeezes the second spring 26 downward and slides inside the vent shell 25, the airflow can pass through the gap between the sealing plug 24 and the closed valve 23. During the process, by adjusting the downward pressure of the sealing plug 24, the downward pressure of the cylinder 2 can be adjusted, and the effect of adjusting the downward pressure is achieved during use. During use, the air is compressed by the air compressor 27 and sent to the inside of the air pipe 17, and then delivered to the cylinder 2 through the connecting pipe 28. During use, the output force of the cylinder 2 can be adjusted by the turntable 20, and when the turntable 20 is turned outward, the second spring 26 pushes the sealing plug 24 back to make the closing valve 23 stuck in the inner wall of the sealing plug 24 to achieve the sealing effect. During use, the device not only achieves the effect of turning the handle 9 to drive the first screw The grooved rod 10 uses the third spring 8 and the push block 7 to squeeze the block 6 out of the inside of the card shell 5 and into the inside of the second slide groove 4. During use, the pressure plate 11 can be quickly installed and disassembled, and the closing valve 23 can slide out from the inner wall of the sealing plug 24 to allow air to pass through. According to the movement of the sealing plug 24, the air pressure can be adjusted during use, and the downward pressure of the cylinder 2 can be adjusted during use. It also has the effect of driving the slide bar 15 to slide into the inside of the third slide groove 16 through the slide box 14, and the mold can be replaced according to the size of the PCB board during use.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PCB board test fixture pressure regulating device, comprising a top plate (1), characterized in that: The outer wall of the top plate (1) is fixedly connected to a cylinder (2), the output end of the cylinder (2) is fixedly connected to a pressure rod (29), the bottom end of the pressure rod (29) is slidably connected to a pressure plate (11), a second slide groove (4) is provided inside the pressure rod (29), a first slide groove (3) is provided inside the pressure plate (11), the first slide groove (3) and the second slide groove (4) are both slidably connected to a card shell (5), a card block (6) is provided inside the card shell (5), and the inner wall of the card shell (5) is threadedly connected to A first threaded rod (10) is provided, the top end of the first threaded rod (10) is fixedly connected to a handle (9), the bottom end of the first threaded rod (10) is fixedly connected to a third spring (8), one end of the third spring (8) is fixedly connected to a push block (7), the outer wall of the push block (7) is slidably connected to the inner wall of the card shell (5), the outer wall of the push block (7) is slidably connected to the outer wall of the card block (6), the outer wall of the card block (6) is slidably connected to the inside of the second slide groove (4), and a mounting assembly is provided on the lower surface of the top plate (1).

2. A PCB board test fixture pressure regulating device according to claim 1, characterized in that: The mounting assembly comprises a mounting plate (12), the upper surface of the mounting plate (12) is fixedly connected to the lower surface of the top plate (1), the lower surface of the mounting plate (12) is fixedly connected to a leg (13), a third slide groove (16) is provided inside the mounting plate (12), the upper surface of the mounting plate (12) is slidably connected to a slide box (14), the lower surface of the slide box (14) is fixedly connected to a slide bar (15), and the outer wall of the slide bar (15) is slidably connected to the inside of the third slide groove (16).

3. A PCB board test fixture pressure regulating device according to claim 1, characterized in that: The outer wall of the top plate (1) is fixedly connected to an air pipe (17), the inner wall of the air pipe (17) is fixedly connected to a closing valve (23), and the outer wall of the air pipe (17) is fixedly connected to a valve housing (18).

4. A PCB board test fixture pressure regulating device according to claim 3, characterized in that: The inner wall of the valve housing (18) is threadedly connected to a second threaded rod (19), the top end of the second threaded rod (19) is fixedly connected to a rotating disk (20), and the outer wall of the second threaded rod (19) is fixedly connected to a blocking sheet (21).

5. A PCB board test fixture pressure regulating device according to claim 4, characterized in that: The outer wall of the baffle (21) is slidably connected to the inner wall of the valve housing (18), and the outer wall of the air pipe (17) is fixedly connected to a first spring (22), one end of the first spring (22) is fixedly connected to the lower surface of the baffle (21).

6. A PCB board test fixture pressure regulating device according to claim 5, characterized in that: The bottom end of the second threaded rod (19) is slidably connected to a sealing plug (24), the outer wall of the second threaded rod (19) is slidably connected to the inner wall of the air pipe (17), and the outer wall of the sealing plug (24) is slidably connected to a ventilation shell (25).

7. A PCB board test fixture pressure regulating device according to claim 6, characterized in that: The outer wall of the ventilation shell (25) is fixedly connected to the outer wall of the air pipe (17), the inner wall of the ventilation shell (25) is fixedly connected to a second spring (26), one end of the second spring (26) is fixedly connected to the bottom end of the sealing plug (24), the outer wall of the sealing plug (24) is slidably connected to the inner wall of the air pipe (17), and the outer wall of the closing valve (23) is slidably connected to the inner wall of the sealing plug (24).

8. A PCB board test fixture pressure regulating device according to claim 7, characterized in that: The top end of the air pipe (17) is fixedly connected to a connecting pipe (28), one end of which is fixedly connected to the rear of the cylinder (2), the bottom end of the air pipe (17) is fixedly connected to an air compressor (27), and the outer wall of the air compressor (27) is fixedly connected to the outer wall of the support leg (13).

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