Electrical testing jig for rigid-flex board
By designing an electrical testing fixture for rigid-flex PCBs and utilizing spring pins to achieve conductivity between the pads of the rigid-flex PCBs, the problem of traditional electrical testing fixtures being unable to measure network relationships is solved, thus achieving efficient electrical testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI WLCP ELECTRICAL & TECH
- Filing Date
- 2025-04-03
- Publication Date
- 2026-05-12
AI Technical Summary
Conventional electrical testing fixtures cannot effectively measure the logical relationship between two independent networks in a rigid-flex PCB, and require a medium such as solder paste to achieve the connection, resulting in a complicated and inefficient electrical testing process.
A rigid-flex board electrical testing fixture was designed, including an upper template and a lower template, a testing structure, a support structure, and a transmission system. Spring pins are used to achieve conductivity between the rigid-flex board pads, and electrical test signals are transmitted through signal lines and data lines to achieve efficient testing of network relationships.
This method achieves high efficiency and accuracy in the electrical testing process of rigid-flex boards, avoids the complicated dielectric connection steps in traditional methods, and improves electrical testing efficiency.
Smart Images
Figure CN224231804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic technology, specifically to a rigid-flex board electrical testing fixture. Background Technology
[0002] The circuit boards used in automotive lights are often designed as rigid boards to support the mounting of electronic components. However, rigid boards cannot be bent in three dimensions. When the headlight module has many functions and limited installation space, and bending is required, flexible circuit boards with aluminum reinforcing plates are often chosen to achieve bending and heat conduction. However, the cost of flexible circuit boards is generally 30-40% higher than that of rigid boards. Therefore, flexible-rigid composite boards have emerged.
[0003] However, conventional electrical testing fixtures can only measure open and short circuits in a single, complete network, point-to-point. They cannot measure the logical relationship between two independent networks. Rigid-flex PCBs, as a special structure, are products combining two types of boards (two independent networks). The combined product cannot fully guarantee the connectivity of its networks; a dielectric medium (solder paste) is needed to connect the two networks. Electrical testing can only be performed after solder paste is applied to the corresponding areas to establish network conductivity between the flexible and rigid PCB pads. Before solder paste is applied, the flexible and rigid PCB networks are not conductive, making it impossible to measure the normality of the network relationship between them.
[0004] To address the aforementioned issues, we have made a series of improvements. Utility Model Content
[0005] The purpose of this utility model is to provide a rigid-flex plate electrical testing fixture to overcome the above-mentioned shortcomings and deficiencies of the prior art.
[0006] A rigid-flex plate electrical testing fixture includes an upper template and a lower template, which are fixed to an electrical testing machine. The lower template includes a test structure, a base, a support structure, and a transmission system. The test structure, base, and support structure are connected to the electrical testing machine via guide posts. The test structure is connected to the support structure at its lower end, and the support structure is connected to the base. The transmission system is located below the base, with one end connected to the test structure and the other end connected to the electrical testing machine.
[0007] The test structure includes: a fixed plate, fixed holes, spring pins, left and right positioning holes, a middle positioning hole, and a positioning post. The fixed holes are located around the perimeter of the fixed plate. The fixed plate is connected to the guide post through the fixed holes. The fixed plate is also connected to the base and support structure through the fixed holes. The spring pins are located in the left and right positioning holes and the middle positioning hole. The spring pins are connected to the transmission system. The left and right positioning holes are located on both sides of the fixed plate. The middle positioning hole is located in the middle of the fixed plate. One end of the positioning post is connected to the base, and the other end of the positioning post passes through the fixed plate.
[0008] Furthermore, the support structure includes: a support plate, pads, and rubber pads. The support plates are interconnected by the pads, the support plates are connected to the guide posts, and the support plates are connected to the test structure and the base respectively by the rubber pads.
[0009] Furthermore, the transmission system includes: a transmission fixing plate, a signal line, an output port, and a data line. The transmission fixing plate is provided with an output port. One end of the signal line is connected to a spring pin, and the other end of the signal line is connected to the output port. The output port is connected to an electrical testing machine via a data line.
[0010] The beneficial effects of this utility model are:
[0011] Compared with traditional technologies, this utility model addresses the problem of complicated and inefficient electrical testing of rigid-flex boards by designing an electrical testing fixture to achieve a highly efficient electrical testing process. Attached image description:
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Figure 2 This is a schematic diagram of the spring needle.
[0014] Figure 3 This is a schematic diagram of the transmission system.
[0015] Figure label:
[0016] Upper template 100 and lower template 200.
[0017] Test structure 210, fixing plate 211, fixing hole 212, spring pin 213, left and right positioning holes 214, middle positioning hole 215 and positioning post 216.
[0018] Base 220, support structure 230, support plate 231, pad 232 and rubber pad 233.
[0019] The transmission system 240, the transmission mounting plate 241, the signal line 242, the output port 243, and the data line 244.
[0020] Electrical testing machine 1 and guide post 2. Detailed Implementation
[0021] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.
[0022] Example 1
[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a schematic diagram of the spring needle. Figure 3 This is a schematic diagram of the transmission system.
[0024] like Figure 1-3 As shown, a rigid-flex plate electrical testing fixture includes an upper template 100 and a lower template 200, which are fixed to an electrical testing machine 1. The lower template 200 includes a test structure 210, a base 220, a support structure 230, and a transmission system 240. The test structure 210, the base 220, and the support structure 230 are connected to the electrical testing machine 1 via guide posts 2. The test structure 210 is connected to the support structure 230 at its lower end, and the support structure 230 is connected to the base 220. The transmission system 240 is located below the base 220, with one end connected to the test structure 210 and the other end connected to the electrical testing machine 1.
[0025] The test structure 210 includes: a fixing plate 211, fixing holes 212, spring pins 213, left and right positioning holes 214, a middle positioning hole 215, and a positioning post 216. The fixing holes 212 are located around the fixing plate 211. The fixing plate 211 is connected to the guide post 2 through the fixing holes 212. The fixing plate 211 is connected to the base 220 and the support structure 230 through the fixing holes 212. The spring pins 213 are located in the left and right positioning holes 214 and the middle positioning hole 215. The spring pins 213 are connected to the transmission system 240. The left and right positioning holes 214 are located on both sides of the fixing plate 211. The middle positioning hole 215 is located in the middle of the fixing plate 211. One end of the positioning post 216 is connected to the base 220, and the other end of the positioning post 216 passes through the fixing plate 211.
[0026] The support structure 230 includes: a support plate 231, a pad 232 and a rubber pad 233. The support plates 231 are connected to each other through the pads 232. The support plates 231 are connected to the guide post 2. The support plates 231 are connected to the test structure 210 and the base 220 respectively through the rubber pads 233.
[0027] The transmission system 240 includes: a transmission fixing plate 241, a signal line 242, an output port 243, and a data line 244. The transmission fixing plate 241 is provided with an output port 243. One end of the signal line 242 is connected to the spring pin 213, and the other end of the signal line 242 is connected to the output port 243. The output port 243 is connected to the electrical tester 1 through the data line 244.
[0028] The method of using this utility model is as follows: the upper template 100 is installed on the lower pressing structure of the electrical testing machine 1, and the lower template 200 is installed on the testing station of the electrical testing machine 1. When electrical testing of the rigid-flex board is required, the rigid-flex board is placed on the testing structure 210, and the positioning holes of the rigid-flex board are aligned with the positioning posts 216 to complete the position calibration. At this time, the left and right positioning holes 214 and the middle positioning hole 215 are respectively aligned with the corresponding pad positions on the rigid-flex board, so that the spring pin 213 contacts the pad. Then, the lower pressing structure is activated, so that the flat upper template 100 presses the rigid-flex board, so that the pads of the rigid-flex board make full contact with the spring pin 213. Due to the characteristics of the spring pin 213, there is no need to worry that the hard pressing will damage the pad or the spring pin 213 itself.
[0029] The principle of this invention is as follows: Flexible and rigid boards are interconnected via spring pins 213. After the above process, when testing begins, the spring pins 213 contact the flexible board pads and the rigid board pads respectively. The interconnected spring pins 213 establish communication between the flexible and rigid board pads, thus achieving network connectivity between the two boards. At this point, an electrical testing fixture can be used to test whether the network relationship between the flexible and rigid boards is normal. Network connectivity and electrical testing are performed simultaneously, achieving two goals at once. The spring pins 213 transmit signal data to the output port 243 via signal line 242, and the output port 243 then transmits the data to the electrical testing machine 1 via data line 244.
[0030] Compared with traditional technologies, this utility model addresses the problem of complicated and inefficient electrical testing of rigid-flex boards by designing an electrical testing fixture to achieve a highly efficient electrical testing process.
[0031] The specific embodiments of this utility model have been described above, but this utility model is not limited thereto. Various changes can be made to this utility model as long as they do not depart from its spirit.
Claims
1. A rigid-flex PCB electrical testing fixture, comprising: An upper template (100) and a lower template (200) are fixed on an electrical testing machine (1). The lower template (200) comprises a test structure (210), a base (220), a support structure (230), and a transmission system (240). The test structure (210), the base (220), and the support structure (230) are connected to the electrical testing machine (1) via guide posts (2). The test structure (210) is connected to the support structure (230) at its lower end. The support structure (230) is connected to the base (220). The transmission system (240) is located below the base (220). One end of the transmission system (240) is connected to the test structure (210), and the other end of the transmission system (240) is connected to the electrical testing machine (1). The test structure (210) includes: a fixing plate (211), fixing holes (212), spring pins (213), left and right positioning holes (214), a middle positioning hole (215), and a positioning post (216). The fixing holes (212) are located around the fixing plate (211). The fixing plate (211) is connected to the guide post (2) through the fixing holes (212). The fixing plate (211) is connected to the base (220) and the support structure (2) through the fixing holes (212). 30) Connection, the spring pin (213) is located in the left and right positioning holes (214) and the middle positioning hole (215), the spring pin (213) is connected to the transmission system (240), the left and right positioning holes (214) are located on both sides of the fixing plate (211), the middle positioning hole (215) is located in the middle of the fixing plate (211), one end of the positioning post (216) is connected to the base (220), and the other end of the positioning post (216) passes through the fixing plate (211).
2. The rigid-flex PCB electrical testing fixture according to claim 1, characterized in that, The support structure (230) includes: a support plate (231), a pad (232) and a rubber pad (233). The support plates (231) are connected to each other through the pads (232). The support plates (231) are connected to the guide post (2). The support plates (231) are connected to the test structure (210) and the base (220) respectively through the rubber pads (233).
3. The rigid-flex PCB electrical testing fixture according to claim 1, characterized in that, The transmission system (240) includes: a transmission fixing plate (241), a signal line (242), an output port (243), and a data line (244). The transmission fixing plate (241) is provided with an output port (243). One end of the signal line (242) is connected to a spring pin (213), and the other end of the signal line (242) is connected to the output port (243). The output port (243) is connected to the electrical tester (1) through the data line (244).