Real four-wire test fixture structure for detecting pressure and distance of flexible printed circuit (FPC) in real time
By designing a FPC soft plate test fixture structure including movable plate, clamping detection component, pressure measurement component and distance measurement component, the problem of inability to detect probe pressure and compression distance in real time in the prior art is solved, and the further improvement is achieved Stable and accurate test results improve production efficiency and product quality.
Patent Information
- Application Number
- CN202420988386.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing FPC soft board test devices cannot detect the pressure and compression distance of the probe in real time, resulting in unstable test results and the compression amount of the probe cannot be accurately controlled, which affects production efficiency and product quality.
A real-time pressure detection and distance real four-wire test fixture structure of FPC soft board is designed, using a combination of movable plate, clamping detection component, pressure measurement component and distance measurement component, and real-time monitoring and detection through pressure sensor and laser rangefinder Pressure and compression distance of the needle.
Real-time detection of the pressure and distance of the FPC soft board is achieved, which improves the stability and accuracy of testing, reduces the faults and repair requirements in production, and reduces the cost of module modification and test verification.
Smart Images
Figure CN222506503U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic product detection, in particular to a true four-wire test fixture structure for real-time detection of pressure and distance of an FPC soft board. Background Art
[0002] The existing FPC soft board test fixture only tests the function and resistance of the FPC soft board, and the test methods include accordion wire needle, double-headed probe, spring-type probe, etc. The pressure between the probe and the gold surface test point of the FPC soft board is kept within a certain range, so that the probe elasticity is not too large to damage the gold surface of the FPC soft board, and the contact resistance is in a relatively stable range; the compression distance between the probe and the gold surface of the FPC soft board is an empirical value for test verification. In the actual production process, it is impossible to ensure that the first-time pass rate is stable at more than 99.5%. There is still a risk of damage to the gold surface of different batches of FPC. Changing the compression amount of the probe requires changing the module test verification, which is costly and time-consuming to improve. Each test cannot monitor whether the actual compression amount of the probe is within the design range.
[0003] Based on this, a true four-wire test fixture structure for real-time detection of pressure and distance of an FPC soft board is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content
[0004] The utility model aims to provide a true four-wire test fixture structure for real-time pressure and distance detection of an FPC soft board, so as to solve the problems in the background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A true four-wire test fixture structure for real-time pressure and distance detection of an FPC soft board comprises a movable plate, a first connecting component is arranged at the center of the movable plate, a plurality of clamping detection components are arranged at the center of the first connecting component, a pressure measuring component is arranged below the clamping detection component, a power component is installed on the surface of the clamping detection component which is the same as the mounting surface of the pressure measuring component, and a distance measurement component is arranged at one end of the power component.
[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:
[0008] In an optional solution: the first connecting component includes a WB positioning block fixedly connected to the center of the movable plate, a double-piece module is arranged on the surface of the movable plate on one side of the WB positioning block, and a floating plate is arranged on one end surface of the WB positioning block.
[0009] In an optional solution: the clamping detection assembly includes a needle module set at the center position of the floating plate, the needle module is fixedly connected to the surface of one end of the WB positioning block, a lower template is set under the movable plate, the lower template is connected to the end of the floating plate away from the WB positioning block and is fixedly connected to the lower template, an FPC board is clamped between the needle module and the lower template, and a window is opened at the center position of the lower template.
[0010] In an optional solution: the pressure measurement assembly includes a pressure sensor fixedly connected to one end of the lower template, the pressure sensor is arranged corresponding to the WB positioning block, the pressure sensor is connected to one end of the needle module, and a first mounting plate is arranged at the other end of the pressure sensor.
[0011] In an optional solution: the power component includes a second mounting plate fixedly connected to the lower template located on the pressure sensor mounting surface, an electric cylinder is mounted on the surface of the second mounting plate, and the distance measurement component is fixedly connected to the other end surface of the electric cylinder.
[0012] In an optional solution: the distance measuring component includes a third mounting plate fixedly connected to the surface of one end of the electric cylinder, the third mounting plate is fixedly connected to the surface of one side of the first mounting plate, and a laser rangefinder is fixedly connected to the surface of the third mounting plate.
[0013] In an optional solution: the needle module can float up and down and be limited by equal height screws.
[0014] In an optional solution: the pressure sensor directly presses against the needle module.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0016] The utility model achieves the purpose of real-time detection of pressure and distance of FPC soft board through testing components. Each test data can monitor pressure and probe compression distance to facilitate fault analysis and maintenance when testing NG, and adjust the probe compression distance according to the hardness of the gold surface of each batch of products (whether needle marks will appear). BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0018] Figure 2 It is a front structural schematic diagram of the test assembly of the utility model.
[0019] Figure 3 It is a side structural schematic diagram of the test assembly of the utility model.
[0020] Figure 4 It is a front structural schematic diagram of the lower mold assembly of the utility model.
[0021] Figure 5 It is a schematic diagram of the overall structure of the lower mold assembly of the utility model.
[0022] Notes on figure numbers: 1. movable plate; 2. WB positioning block; 3. lower template; 4. pressure sensor; 5. laser rangefinder; 6. third mounting plate; 7. FPC board; 8. floating plate; 9. needle module; 10. first mounting plate; 11. second mounting plate; 12. electric cylinder. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0024] Example 1
[0025] In one embodiment, Figure 1-Figure 5 As shown, it includes a movable plate 1, a first connecting component is arranged at the center position of the movable plate 1, a plurality of clamping detection components are arranged at the center position of the first connecting component, a pressure measuring component is arranged below the clamping detection component, a power component is installed on the surface of the clamping detection component which is the same as the mounting surface of the pressure measuring component, and a distance measurement component is arranged at one end of the power component.
[0026] In one embodiment, Figure 2 and Figure 3 As shown, the first connection component includes a WB positioning block 2 fixedly connected to the center position of the movable plate 1, a double-piece module is arranged on the surface of the movable plate 1 on one side of the WB positioning block 2, and a floating plate 8 is arranged on the surface of one end of the WB positioning block 2. The clamping detection component includes a needle module 9 arranged at the center position of the floating plate, and the needle module 9 can float up and down, and is limited by equal height screws. The up and down floating of the needle module 9 can achieve the control of the wall thickness of different parts of the FPC board 7 by adjusting the design and position of the needle module 9 to meet the product design and requirements. The group 9 is fixedly connected to the surface of one end of the WB positioning block 2, and a lower template 3 is arranged under the movable plate 1. The lower template 3 is connected to the end of the floating plate 8 away from the WB positioning block 2 and is fixedly connected to the lower template 3. The FPC board 7 is clamped between the needle module group 9 and the lower template 3. A window is opened at the center position of the lower template 3. The WB positioning block 2 is used to bond and fix the FPC board 7. At this time, the FPC board 7 matches the groove of the WB positioning block 2, and at the same time provides precise alignment and stable support, ensuring the accuracy and reliability of the bonding of the FPC board 7.
[0027] Example 2
[0028] In one embodiment, Figure 4As shown, the pressure measurement assembly includes a pressure sensor 4 fixedly connected to one end of the lower template 3, the pressure sensor 4 is arranged corresponding to the WB positioning block 2, the pressure sensor 4 is connected to one end of the needle module 9, and the other end of the pressure sensor 4 is provided with a first mounting plate 10, and the power assembly includes a second mounting plate 11 fixedly connected to the lower template 3 and located on the mounting surface of the pressure sensor 4, and an electric cylinder 12 is installed on the surface of the second mounting plate 11. After the FPC board 7 is fixedly positioned, the needle module 9 is allowed to float, and the electric cylinder 12 is added to provide pressure to the needle module 9; A pressure sensor 4 is added between 9 and the electric cylinder 12; one end of the pressure sensor 4 is fixed on the electric cylinder 12, and the other end is directly in contact with the needle module 9; a laser rangefinder 5 is added, and the laser rangefinder 5 and the pressure sensor 4 are relatively fixed on the electric cylinder 12; the electric cylinder 12 moves to make the pressure sensor 4 contact the needle module 9, and when the module moves to the point where the probe just contacts the FPC soft gold surface, the readings of the pressure sensor 4 and the laser rangefinder 5 are recorded as 0 point, and thereafter, when the electric cylinder 12 moves again, the increased pressure of the pressure sensor 4 is recorded as the total pressure of the probe being compressed.
[0029] In one embodiment, Figure 1 and Figure 5 As shown, a distance measuring component is provided on the other end surface of the electric cylinder 12, and the distance measuring component includes a third mounting plate 6 fixedly connected to the surface of one end of the electric cylinder 12, and the third mounting plate 6 is fixedly connected to the surface of one side of the first mounting plate 10. A laser rangefinder 5 is fixedly connected to the surface of the third mounting plate 6, and the distance increased by the laser rangefinder 5 is recorded as the probe compression distance.
[0030] The above embodiment discloses a real-time detection pressure and distance true four-wire test fixture structure for FPC soft board, wherein the up and down floating of the needle module 9 can realize the control of the wall thickness of different parts of the FPC board 7 by adjusting the design and position of the needle module 9 to meet the product design and requirements, and the FPC board 7 is bonded and fixed by the WB positioning block 2. At this time, the FPC board 7 matches the groove of the WB positioning block 2, and provides precise alignment and stable support, ensuring the accuracy and reliability of the bonding of the FPC board 7. After the FPC board 7 is fixed and positioned, the needle module 9 is allowed to float to increase the electrical The cylinder 12 provides pressure to the needle module 9; a pressure sensor 4 is added between the needle module 9 and the electric cylinder 12; one end of the pressure sensor 4 is fixed on the electric cylinder 12, and the other end is directly in contact with the needle module 9; a laser rangefinder 5 is added, and the laser rangefinder 5 and the pressure sensor 4 are relatively fixed on the electric cylinder 12; the electric cylinder 12 moves to make the pressure sensor 4 contact the needle module 9, and when the module moves to the point where the probe just touches the FPC soft gold surface, the readings of the pressure sensor 4 and the laser rangefinder 5 are recorded as 0 points, and thereafter, when the electric cylinder 12 moves again, the increased pressure of the pressure sensor 4 is recorded as the total pressure of the probe being compressed.
[0031] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A true four-wire test fixture structure for real-time pressure and distance detection of FPC soft board, comprising a movable plate (1), characterized in that: A first connection component is arranged at the center of the movable plate (1), a plurality of clamping detection components are arranged at the center of the first connection component, a pressure measurement component is arranged below the clamping detection component, a power component is installed on the surface of the clamping detection component which is the same as the mounting surface of the pressure measurement component, and a distance measurement component is arranged at one end of the power component.
2. According to claim 1, a true four-wire test fixture structure for real-time pressure and distance detection of FPC soft board, characterized in that: The first connection assembly comprises a WB positioning block (2) fixedly connected to the center position of the movable plate (1), a double-piece module is arranged on the surface of the movable plate (1) on one side of the WB positioning block (2), and a floating plate (8) is arranged on the surface of one end of the WB positioning block (2).
3. A true four-wire test fixture structure for real-time pressure and distance detection of FPC soft board according to claim 2, characterized in that: The clamping detection component comprises a needle module (9) arranged at the center position of the floating plate (8), the needle module (9) is fixedly connected to the surface of one end of the WB positioning block (2), a lower template (3) is arranged below the movable plate (1), the lower template (3) is connected to the end of the floating plate (8) away from the WB positioning block (2) and is fixedly connected to the lower template (3), an FPC board (7) is clamped between the needle module (9) and the lower template (3), and a window is opened at the center position of the lower template (3).
4. A true four-wire test fixture structure for real-time pressure and distance detection of FPC soft board according to claim 3, characterized in that: The pressure measurement assembly comprises a pressure sensor (4) fixedly connected to one end of the lower template (3), the pressure sensor (4) being arranged corresponding to the WB positioning block (2), the pressure sensor (4) being connected to one end of the needle module (9), and the other end of the pressure sensor (4) being provided with a first mounting plate (10).
5. According to claim 3, a true four-wire test fixture structure for real-time pressure and distance detection of FPC soft board, characterized in that: The power assembly comprises a second mounting plate (11) fixedly connected to the lower template (3) and located on the mounting surface of the pressure sensor (4); an electric cylinder (12) is mounted on the surface of the second mounting plate (11); and the distance measuring assembly is fixedly connected to the other end surface of the electric cylinder (12).
6. A true four-wire test fixture structure for real-time pressure and distance detection of FPC soft board according to claim 5, characterized in that: The distance measuring assembly comprises a third mounting plate (6) fixedly connected to a surface of one end of the electric cylinder (12); the third mounting plate (6) is fixedly connected to a surface of one side of the first mounting plate (10); and a laser rangefinder (5) is fixedly connected to the surface of the third mounting plate (6).
7. The real-time detection pressure and distance true four-wire test fixture structure of FPC soft board according to claim 3 is characterized in that: The needle module (9) can float up and down and is limited by equal height screws.
8. The real-time detection pressure and distance true four-wire test fixture structure of FPC soft board according to claim 4 is characterized in that: The pressure sensor (4) directly contacts the needle module (9).