A test fixture for FPC flexible circuit boards

Abstract

This utility model provides a test fixture for FPC flexible circuit boards, belonging to the field of test fixture technology, to solve the problem of dust easily adhering to the guide rail of the linear module, causing jamming during pressure head movement. It includes a test machine body, a dustproof protective cover, a position adjustment screw, a reciprocating self-locking drive component, a linear module guide rail, and a limiting slider. The dustproof protective cover is slidably connected vertically to the inner sides of the guide grooves on the left and right sides of the test machine body; the position adjustment screw is rotatably connected to the left and right sides of the test machine body; the reciprocating self-locking drive component is bolted to the left and right sides of the test machine body; the linear module guide rail is bolted to the left side of the test machine body; and the limiting slider is slidably connected to the front side of the linear module guide rail. This utility model avoids dust and impurities in the air adhering to the surface of the linear module guide rail, reducing the jamming phenomenon during pressure head movement.

Description

Technical Field

[0001] This utility model belongs to the field of testing fixture technology, and more specifically, it relates to a testing fixture for FPC flexible circuit boards. Background Technology

[0002] When testing the bending resistance of an FPC flexible circuit board using an FPC bending tester, the FPC flexible circuit board needs to be clamped and fixed first using pneumatic clamps. Then, the pressure head moves to push the FPC flexible circuit board to bend. When the resistance value exceeds the set threshold, the FPC bending tester will automatically stop the test and record the current number of bends to evaluate the electrical stability and service life of the FPC flexible circuit board during the bending process.

[0003] For example, CN222689565U discloses a temperature and humidity bending durability testing machine, including an environmental chamber. The environmental chamber contains the main body of the temperature and humidity bending durability testing machine, and a durability testing component is installed on the top of the main body. The durability testing component contains a positioning component, and a fixing component is installed on top of the positioning component. A cabinet door switch component is installed on the outer wall of the environmental chamber, and a base is fixedly connected to the bottom of the environmental chamber. An electrical control cabinet is installed on the side of the base, and an operation panel is installed on the top of the electrical control cabinet. The durability testing component includes a high and low temperature servo motor, a first synchronous toothed belt, a front flip plate, a second synchronous toothed belt, and a rear flip plate. This utility model facilitates bending durability testing of flexible materials such as flexible screens and FPCs under temperature and humidity conditions, ensuring the accuracy of the test data.

[0004] Based on the above, after prolonged use, dust tends to adhere to the guide rails of the linear module of the FPC bending tester, affecting the stability of the fit between the slider and the guide rail. This can cause the pressure head to jam, affecting the bending effect on the FPC flexible circuit board, and consequently impacting the testing efficiency and accuracy of the FPC flexible circuit board. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a testing fixture for FPC flexible circuit boards. This fixture addresses the issue that after prolonged use, dust easily adheres to the guide rails of the linear module in the FPC bending tester, affecting the stability of the fit between the slider and the guide rails. This leads to jamming of the pressure head, impacting the bending effect on the FPC flexible circuit board and consequently affecting the testing efficiency and accuracy of the results.

[0006] The purpose and effect of this utility model's testing fixture for flexible printed circuit boards (FPCs) are achieved through the following specific technical means: A test fixture for FPC flexible circuit boards includes a test machine body, a dustproof protective cover, position adjustment screws, a positioning structure, a lubrication structure, a reciprocating self-locking drive component, a linear module guide rail, and a limit slider. Guide grooves are provided on both the left and right sides of the test machine body. The dustproof protective cover is slidably connected to the inner side of the guide grooves on both sides of the test machine body. A bellows dust cover is provided inside the guide grooves. Two position adjustment screws are provided, each rotatably connected to the left and right sides of the test machine body. All rods are threadedly connected to the dustproof protective cover via threaded pairs; the positioning structure is located on the front side of the main body of the testing machine; two reciprocating self-locking drive components are provided, and the two reciprocating self-locking drive components are respectively bolted to the left and right sides of the main body of the testing machine, and the output shafts of the two reciprocating self-locking drive components are respectively coaxially fixedly connected to the two position adjusting screws; the linear module guide rail is bolted to the left side of the main body of the testing machine; the limiting slider is slidably connected to the front side of the linear module guide rail; the lubrication structure is located on the front side of the linear module guide rail.

[0007] Furthermore, the positioning structure includes a limiting electric push rod and a sliding mounting base; the limiting electric push rod is bolted to the front side of the main body of the testing machine; the sliding mounting base is slidably connected to the front side of the main body of the testing machine, and the sliding mounting base is fixedly connected to the piston rod of the limiting electric push rod; a fixed mounting base is bolted to the right side of the main body of the testing machine, and a pneumatic clamp is set on the upper part of the fixed mounting base; a guide mounting cylinder is fixedly connected to the front side of the limiting slider, a guide electric push rod is bolted inside the guide mounting cylinder, and a pressure head is slidably connected to the inner side of the guide mounting cylinder, and the pressure head is fixedly connected to the piston rod of the guide electric push rod.

[0008] Furthermore, the positioning structure also includes circuit board clamping blocks and clamping electric push rods; two circuit board clamping blocks are provided, and the two circuit board clamping blocks are slidably connected to the upper and lower sides of the sliding mounting base respectively; multiple clamping electric push rods are provided, and the multiple clamping electric push rods are evenly distributed and fixedly connected to the upper and lower sides of the sliding mounting base, and the piston rods of the multiple clamping electric push rods are fixedly connected to the two circuit board clamping blocks respectively.

[0009] Furthermore, the lubrication structure includes a swing pressure plate and an oil-absorbing sponge block; multiple swing pressure plates are provided, and the multiple swing pressure plates are evenly distributed and hinged to the left and right sides of the linear module guide rail by torsion springs; the oil-absorbing sponge block is located inside the limiting slider.

[0010] Furthermore, the lubrication structure also includes a sliding extrusion plate, a sealing rubber pad, and a reset elastic element; the sliding extrusion plate is slidably connected to the inner side of the limiting slider; the sealing rubber pad is bonded to the outer side of the sliding extrusion plate; multiple reset elastic elements are provided, and the sliding extrusion plate is elastically connected to the limiting slider through multiple reset elastic elements.

[0011] Furthermore, the lubrication structure also includes a pressure-bearing guide rod and an oil injection check valve; two pressure-bearing guide rods are provided, and both pressure-bearing guide rods are fixedly connected to the lower part of the sliding extrusion plate; the oil injection check valve is fixedly connected to the upper part of the limiting slider.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention uses a dustproof protective cover to shield the test area, preventing dust and impurities from adhering to the surface of the linear module guide rail and the FPC flexible circuit board. This avoids the problem of decreased stability in the fit between the limit slider and the linear module guide rail caused by dust adhesion, reduces jamming during pressure head movement, and ensures the bending effect on the FPC flexible circuit board, thereby guaranteeing test efficiency and result accuracy. At the same time, the dustproof protective cover can continuously protect each test component, reducing the impact of heat dissipation when components are covered by dust, extending the service life of the equipment. It can automatically apply lubricating oil to the surface of the linear module guide rail, ensuring the lubrication effect between the slider and the guide rail, reducing mechanical wear, and avoiding the inconvenience of manual periodic lubrication, effectively reducing the workload of workers and improving the efficiency of lubricating oil addition. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram showing the disassembled structure of the main body of the testing machine, the dustproof protective cover, the position adjustment screw, and the reciprocating self-locking drive component of this utility model.

[0015] Figure 3 This is a schematic diagram showing the positional relationship between the main body of the testing machine, the limit electric push rod, the sliding mounting base, and the linear module guide rail of this utility model.

[0016] Figure 4 This is a schematic diagram showing the disassembled structure of the sliding mounting base, circuit board clamp, and clamping electric push rod of this utility model.

[0017] Figure 5 This is a structural schematic diagram of the linear module guide rail of this utility model.

[0018] Figure 6 This is a schematic diagram showing the disassembled structure of the linear module guide rail and the limiting slider of this utility model.

[0019] Figure 7 This is a schematic diagram showing the positional relationship between the limiting slider and the oil-absorbing sponge block of this utility model.

[0020] Figure 8 This is a schematic diagram showing the disassembled structure of the limiting slider, oil-absorbing sponge block, and sliding extrusion plate of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Test machine body; 101. Limiting electric push rod; 102. Sliding mounting base; 103. Circuit board clamping block; 104. Clamping electric push rod; 2. Dustproof protective cover; 3. Position adjusting screw; 4. Reciprocating self-locking drive component; 5. Linear module guide rail; 501. Swinging pressure plate; 6. Limiting slider; 601. Oil-absorbing sponge block; 602. Sliding extrusion plate; 603. Sealing rubber gasket; 604. Reset elastic component; 605. Pressure-bearing guide rod; 606. Oil injection check valve. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. Example 1

[0023] As attached Figure 1 To be continued Figure 4 As shown: This utility model provides a test fixture for FPC flexible circuit boards, including a test machine body 1, a dustproof protective cover 2, a position adjustment screw 3, a positioning structure, a reciprocating self-locking drive component 4, a linear module guide rail 5, and a limiting slider 6. Guide grooves are provided on both the left and right sides of the test machine body 1. The dustproof protective cover 2 is slidably connected to the inner side of the guide grooves on both sides of the test machine body 1, and a bellows dust cover is provided on the inner side of the guide grooves. Two position adjustment screws 3 are provided, rotatably connected to the left and right sides of the test machine body 1 respectively, and both position adjustment screws 3 are threadedly connected to the dustproof protective cover 2 via threaded pairs. The positioning structure is located on the front side of the test machine body 1. Two reciprocating self-locking drive components 4 are provided, bolted to the left and right sides of the test machine body 1 respectively, and the output shafts of the two reciprocating self-locking drive components 4 are coaxially fixedly connected to the two position adjustment screws 3 respectively. The linear module guide rail 5 is bolted to the left side of the test machine body 1. The limiting slider 6 is slidably connected to the front side of the linear module guide rail 5.

[0024] The positioning structure includes a limiting electric push rod 101 and a sliding mounting base 102. The limiting electric push rod 101 is bolted to the front of the main body 1 of the testing machine. The sliding mounting base 102 is slidably connected to the front of the main body 1 of the testing machine, and the sliding mounting base 102 is fixedly connected to the piston rod of the limiting electric push rod 101. A fixed mounting base is bolted to the right side of the main body 1 of the testing machine, and a pneumatic clamp is set on the upper part of the fixed mounting base. A guide mounting cylinder is fixedly connected to the front of the limiting slider 6, and a guide electric push rod is bolted inside the guide mounting cylinder. The pressure head is slidably connected to the inner side of the guide mounting cylinder, and the pressure head is fixedly connected to the piston rod of the guide electric push rod.

[0025] The positioning structure also includes a circuit board clamping block 103 and a clamping electric push rod 104. There are two circuit board clamping blocks 103, which are slidably connected to the upper and lower sides of the sliding mounting base 102 respectively. There are multiple clamping electric push rods 104, which are evenly distributed and fixedly connected to the upper and lower sides of the sliding mounting base 102. The piston rods of the multiple clamping electric push rods 104 are fixedly connected to the two circuit board clamping blocks 103 respectively.

[0026] The specific usage and function of this embodiment are as follows: When testing the bending resistance of the FPC flexible circuit board, the FPC flexible circuit board is first placed above the fixed mounting base by passing it between the two circuit board clamps 103. The FPC flexible circuit board is then clamped by pneumatic clamps. After the FPC flexible circuit board is placed, the reciprocating self-locking drive 4 is activated, causing the reciprocating self-locking drive 4 to rotate the position adjustment screw 3, causing the dustproof protective cover 2 to slide upward along the main body 1 of the testing machine, blocking the outside of the testing area and preventing dust and impurities in the air from adhering to the linear module guide rail 5 and the outside of the FPC flexible circuit board. At this time, the clamping electric push rod 104 pushes the two circuit board clamps 103 to slide inward along the sliding mounting base 102, so that the two circuit board clamps 103 clamp the FPC flexible circuit board. At this time, the guide electric push rod pushes the pressure head to slide to the right along the guide mounting cylinder, so that the pressure head applies pressure to the FPC flexible circuit board. The flexible circuit board will bend. After bending, the pressure head returns to its original position, and the limit electric push rod 101 drives the sliding mounting base 102 to slide to the left. At this time, the two circuit board clamping blocks 103 will flatten the FPC flexible circuit board. After flattening, the clamping electric push rod 104 pulls the two circuit board clamping blocks 103 to move outward. At the same time, the limit electric push rod 101 pushes the sliding mounting base 102 back. After the sliding mounting base 102 returns to its original position, the two circuit board clamping blocks 103 clamp the FPC flexible circuit board again. The pressure head repeats the action to make the FPC flexible circuit board bend again. After the test is completed, the reciprocating self-locking drive 4 reverses to move the dust cover 2 downward, which makes it convenient for the staff to replace the FPC flexible circuit board. Before the FPC bending tester is used up, the dust cover 2 is moved to the outside of the test area and then the power of the FPC bending tester is turned off so that the dust cover 2 continues to protect each test component. Example 2

[0027] As attached Figure 3 To be continued Figure 8 As shown: Based on Embodiment 1, a lubrication structure is also included; the lubrication structure is disposed on the front side of the linear module guide rail 5.

[0028] The lubrication structure includes a swing pressure plate 501 and an oil-absorbing sponge block 601. Multiple swing pressure plates 501 are provided, and the multiple swing pressure plates 501 are evenly distributed and hinged to the left and right sides of the linear module guide rail 5 by torsion springs. The oil-absorbing sponge block 601 is located inside the limit slider 6.

[0029] The lubrication structure also includes a sliding extrusion plate 602, a sealing rubber pad 603, and a reset elastic element 604. The sliding extrusion plate 602 is slidably connected to the inner side of the limiting slider 6. The sealing rubber pad 603 is bonded to the outer side of the sliding extrusion plate 602. Multiple reset elastic elements 604 are provided, and the sliding extrusion plate 602 is elastically connected to the limiting slider 6 through multiple reset elastic elements 604.

[0030] The lubrication structure also includes a pressure-bearing guide rod 605 and an oil injection check valve 606; there are two pressure-bearing guide rods 605, both of which are fixedly connected to the lower part of the sliding extrusion plate 602; the oil injection check valve 606 is fixedly connected to the upper part of the limiting slider 6.

[0031] The specific usage and function of this embodiment are as follows: When the linear module drives the limiting slider 6 to slide downwards along the linear module guide rail 5 to change the pressure head height, the pressure guide rod 605 will contact the swing pressure plate 501. At this time, the swing pressure plate 501 will apply a reverse force to the pressure guide rod 605, causing the pressure guide rod 605 to drive the sliding extrusion plate 602 to slide upwards. At this time, the sliding extrusion plate 602 will squeeze the oil-absorbing sponge block 601, causing the lubricating oil in the oil-absorbing sponge block 601 to seep out and coat the outside of the linear module guide rail 5. The sealing rubber gasket 603 can resist the sliding extrusion plate 602. The gap between 02 and the limiting slider 6 is compensated. After the limiting slider 6 contacts the swing pressure plate 501, the limiting slider 6 will push the swing pressure plate 501 to swing downward along the hinge point. After the limiting slider 6 passes the swing pressure plate 501, the torsion spring will cause the swing pressure plate 501 to automatically reset. At this time, the pressure guide rod 605 will no longer contact the swing pressure plate 501. The reset elastic element 604 will pull the sliding compression plate 602 to reset. After the lubricating oil in the oil-absorbing sponge block 601 decreases, lubricating oil is added to the oil-absorbing sponge block 601 through the oil injection check valve 606.

[0032] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0033] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0034] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A test fixture for a flexible printed circuit board (FPC), comprising a test machine body (1), a dustproof protective cover (2), a position adjustment screw (3), a positioning structure, a lubrication structure, a reciprocating self-locking drive component (4), a linear module guide rail (5), and a limiting slider (6); guide grooves are provided on both the left and right sides of the test machine body (1), and the dustproof protective cover (2) is slidably connected to the inner side of the guide grooves on the left and right sides of the test machine body (1), and a bellows dustproof cover is provided on the inner side of the guide groove; characterized in that: Two position adjustment screws (3) are provided, and the two position adjustment screws (3) are rotatably connected to the left and right sides of the main body (1) of the testing machine respectively. Both position adjustment screws (3) are threadedly connected to the dustproof protective cover (2) through a threaded pair. The positioning structure is provided on the front side of the main body (1) of the testing machine. Two reciprocating self-locking drive components (4) are provided, and the two reciprocating self-locking drive components (4) are bolted to the left and right sides of the main body (1) of the testing machine respectively. The output shafts of the two reciprocating self-locking drive components (4) are coaxially fixedly connected to the two position adjustment screws (3) respectively. The linear module guide rail (5) is bolted to the left side of the main body (1) of the testing machine. The limiting slider (6) is slidably connected to the front side of the linear module guide rail (5) up and down. The lubrication structure is provided on the front side of the linear module guide rail (5).

2. The test fixture for FPC flexible circuit board of claim 1, wherein: The positioning structure includes a limiting electric push rod (101) and a sliding mounting seat (102); the limiting electric push rod (101) is bolted to the front side of the test machine body (1); the sliding mounting seat (102) is slidably connected to the front side of the test machine body (1), and the sliding mounting seat (102) is fixedly connected to the piston rod of the limiting electric push rod (101); a fixed mounting seat is bolted to the right side of the test machine body (1), and a pneumatic clamp is set on the upper part of the fixed mounting seat; a guide mounting cylinder is fixedly connected to the front side of the limiting slider (6), a guide electric push rod is bolted inside the guide mounting cylinder, and the pressure head is slidably connected to the inner side of the guide mounting cylinder, and the pressure head is fixedly connected to the piston rod of the guide electric push rod.

3. The test fixture for FPC flexible circuit board of claim 2, wherein: The positioning structure further includes a circuit board clamp (103) and a clamping electric push rod (104); there are two circuit board clamps (103), which are slidably connected to the upper and lower sides of the sliding mounting base (102); there are multiple clamping electric push rods (104), which are evenly distributed and fixedly connected to the upper and lower sides of the sliding mounting base (102), and the piston rods of the multiple clamping electric push rods (104) are fixedly connected to the two circuit board clamps (103) respectively.

4. The test fixture for FPC flexible circuit board of claim 3, wherein: The lubrication structure includes a swing pressure plate (501) and an oil-absorbing sponge block (601); multiple swing pressure plates (501) are provided, and the multiple swing pressure plates (501) are evenly distributed and hinged to the left and right sides of the linear module guide rail (5) by torsion springs; the oil-absorbing sponge block (601) is located inside the limiting slider (6).

5. The test fixture for FPC flexible circuit board of claim 4, wherein: The lubrication structure further includes a sliding extrusion plate (602), a sealing rubber pad (603), and a reset elastic element (604); the sliding extrusion plate (602) is slidably connected to the inner side of the limiting slider (6); the sealing rubber pad (603) is bonded to the outer side of the sliding extrusion plate (602); multiple reset elastic elements (604) are provided, and the sliding extrusion plate (602) is elastically connected to the limiting slider (6) through multiple reset elastic elements (604).

6. The test fixture for FPC flexible circuit board of claim 5, wherein: The lubrication structure also includes a pressure-bearing guide rod (605) and an oil injection check valve (606); there are two pressure-bearing guide rods (605), both of which are fixedly connected to the lower part of the sliding extrusion plate (602); the oil injection check valve (606) is fixedly connected to the upper part of the limiting slider (6).

Images