Circuit board detection tool

Abstract

The utility model discloses a circuit board detection tool which comprises a detection box body and a support assembly, the detection box body is provided with a detection interface which can be connected with a detection pen and is used for analyzing a detection signal of the detection pen, a hidden space which is concavely arranged is formed on the surface of the detection box body, and the support assembly is arranged on the surface of the detection box body. The adjusting device can be accommodated in the hidden space in a lodging manner and comprises an adjusting rod and a supporting frame, one end of the adjusting rod is arranged in the hidden space and is movably hinged to the detection box body, and the supporting frame is movably hinged to the other end of the adjusting rod and is provided with a positioning part for supporting the circuit board upwards; the positioning part is used for deflecting relative to the adjusting rod under the condition that the adjusting rod is switched from the lodging state to the vertical state and can horizontally support the circuit board, the tool integrates the detection box body and the support assembly, the tool is convenient for a maintainer to carry, and the maintainer can quickly build a rack for detecting the circuit board through the tool, so that the detection efficiency of the circuit board is improved. And the detection efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment repair technology, specifically relating to a circuit board testing fixture. Background Technology

[0002] With the increasing number of cars on the road in China, the functions of in-vehicle information systems are becoming more and more diverse, leading to a relative increase in the frequency of after-sales malfunctions. This necessitates technicians to quickly and accurately identify failures in these systems. Currently, technicians need to bring the necessary signal acquisition devices and tooling to 4S stores or the fault location for verification, requiring the temporary setup of a testing platform, resulting in low testing efficiency. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, this utility model provides a circuit board testing fixture, which aims to solve the technical problem that technicians need to temporarily set up a test bench in the prior art, resulting in low testing efficiency.

[0004] To achieve the above objectives, this utility model provides a circuit board testing fixture, which includes a testing box body and a support assembly. The testing box body has a testing interface for connecting a testing pen and can analyze the testing signal of the testing pen. The surface of the testing box body has a recessed hidden space. The support assembly can be folded down and housed in the hidden space and includes an adjusting rod and a support frame. One end of the adjusting rod is placed in the hidden space and is movably hinged to the testing box body. The support frame is movably hinged to the other end of the adjusting rod and has a positioning part for supporting the circuit board upward. The positioning part is used to deflect relative to the adjusting rod when the adjusting rod switches from a folded state to an upright state, so as to horizontally support the circuit board.

[0005] In this embodiment of the utility model, the support frame includes a connecting rod, a mounting plate, and two support rods constituting a positioning part. One end of the connecting rod is movably hinged to the adjusting rod, and the other end of the connecting rod is provided with the mounting plate. The deflection angle of the connecting rod relative to the adjusting rod is set to 90°. The two support rods are sequentially spaced along the length direction of the mounting plate and are movably disposed on the mounting plate.

[0006] In this embodiment of the invention, both support rods have stepped portions to allow the two ends of the circuit board to be positioned in a corresponding manner.

[0007] In this embodiment of the utility model, the support frame further includes a first limiting member rotatably disposed on the support rod. The first limiting member is used to rotate to be disposed opposite to the step portion so as to lock the circuit board on the step portion.

[0008] In this embodiment of the utility model, a limiting groove extending along the length direction is also formed on the stepped portion, and the support frame also includes a second limiting member slidably disposed in the limiting groove. The second limiting member is used to press the circuit board onto the mounting plate.

[0009] In this embodiment of the utility model, the connecting rod includes a first rod segment and a second rod segment connected in sequence. The first rod segment is movably hinged to the adjusting rod, and the second rod segment is provided with a mounting plate. The second rod segment is rotatably arranged relative to the first rod segment.

[0010] And / or, the mounting plate is used to form an adjustment groove on one side facing the circuit board, one end of each support rod extends into the adjustment groove from the side opening of the adjustment groove, and the mounting plate is also provided with a position adjustment opening communicating with the adjustment groove, the position adjustment opening allowing fasteners to extend into the adjustment groove and fix the support rods.

[0011] In this embodiment of the utility model, the top surface of the adjusting rod extends out to form a first ear plate and a second ear plate that are relatively spaced apart. The end of the connecting rod near the adjusting rod extends out to form a middle ear plate. The middle ear plate is connected in series between the first ear plate and the second ear plate through a connecting shaft. The middle ear plate is used to abut against the top surface of the adjusting rod when the connecting rod is deflected 90° relative to the adjusting rod.

[0012] In this embodiment of the utility model, the adjusting rod includes a fixed rod part and a lifting rod part passing through the fixed rod part. The fixed rod part is movably hinged to the detection box body, and the end of the lifting rod part away from the fixed rod part is movably hinged to the support frame. A fixing member is provided on the side wall of the fixed rod part. The fixing member can be screwed on and is used to abut against and fix the lifting rod part.

[0013] In this embodiment of the invention, the testing box body is further provided with a testing pen placement area for accommodating testing pens. The testing pen placement area is located near one of the side panels of the testing box, and the side panel is provided with a door panel that can open or close the testing pen placement area.

[0014] In this embodiment of the invention, the detection box body is also used to send analog signals to the circuit board. A simulation output interface is provided at the bottom of the hidden space. The simulation output interface is used for the circuit board and the detection box body to communicate and connect via signal lines.

[0015] Through the above technical solution, the circuit board testing fixture provided by this utility model embodiment has the following beneficial effects:

[0016] When using the aforementioned circuit board testing fixture, which includes a testing box body and a support assembly, the testing box body has a testing interface for connecting testing pens. The testing pens communicate with the analysis module inside the testing box body through the testing interface. Maintenance personnel use the testing pens to test different electronic components on the circuit board and analyze the signals through the analysis module to determine the cause of the circuit board fault. In the support assembly, one end of an adjusting rod is placed in a hidden space within the testing box body and is hinged to the testing box body. During testing, the maintenance personnel set the adjusting rod to an upright position and deflect the positioning part of the support frame relative to the adjusting rod to horizontally support the circuit board. After maintenance, the support assembly can be folded down and stored in the hidden space. This fixture integrates the testing box body and the support assembly, making it easy for maintenance personnel to carry. Furthermore, this fixture allows maintenance personnel to quickly build a test bench for circuit board testing, thereby improving testing efficiency.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the circuit board testing fixture according to one embodiment of the present utility model;

[0020] Figure 2 This is a side view of a circuit board inspection fixture according to an embodiment of the present invention;

[0021] Figure 3 This is a partial schematic diagram of the support rod according to one embodiment of the present utility model;

[0022] Figure 4 This is a partial schematic diagram of the bracket assembly according to one embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the circuit board testing fixture in its stored state according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the front side of the mounting plate according to one embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the rear side of the mounting plate according to one embodiment of the present utility model;

[0026] Figure 8This is a schematic diagram of the internal space of the detection box body according to an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached figures

[0028] 1. Detection box body; 10. Hidden space

[0029] 101 Simulation Output Interface 11 Logic Analyzer

[0030] 12 Oscilloscope 13 Chip Emulator

[0031] 14 CAN tool 15 Power supply

[0032] 16 Battery 17 Test pen placement area

[0033] 18 Handle 19 Detection Interface

[0034] 2. Bracket assembly 21. Adjustment rod

[0035] 211 Fixed rod section 212 Lifting rod section

[0036] 213 Fastener 214 First Ear Plate

[0037] 215 Second Ear Plate 216 Top Surface

[0038] 22 Support frame 221 Connecting rod

[0039] 2211 First segment 2212 Second segment

[0040] 2213 Middle Ear Plate 222 Mounting Plate

[0041] 2221 Adjusting slide 2222 Connecting hole

[0042] 223 Support rod 2231 Step section

[0043] 2232 Limiting groove 224 First limiting component

[0044] 225 Second limit component Detailed Implementation

[0045] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0046] The circuit board testing fixture of this utility model is described below with reference to the accompanying drawings.

[0047] like Figure 1As shown, this utility model provides a circuit board testing fixture, wherein the circuit board testing fixture includes:

[0048] The detection box body 1 has a detection interface 19 for connecting to the detection pen and can analyze the detection signal of the detection pen. The surface of the detection box body 1 has a recessed hidden space 10.

[0049] The bracket assembly 2 can be folded down and housed in the hidden space 10 and includes an adjustment rod 21 and a support frame 22. One end of the adjustment rod 21 is placed in the hidden space 10 and is movably hinged to the detection box body 1. The support frame 22 is movably hinged to the other end of the adjustment rod 21 and has a positioning part that supports the circuit board upward. The positioning part is used to deflect relative to the adjustment rod 21 when the adjustment rod 21 is switched from the folded state to the upright state, so as to horizontally support the circuit board.

[0050] When using the aforementioned circuit board testing fixture, which includes a testing box body 1 and a support assembly 2, the testing box body 1 has a testing interface 19 for connecting a testing pen. The testing pen communicates with the analysis module inside the testing box body 1 through the testing interface 19. Maintenance personnel use the testing pen to test different electronic components on the circuit board and analyze the signals through the analysis module to determine the cause of the circuit board failure. In the support assembly 2, one end of the adjusting rod 21 is placed in the hidden space 10 of the testing box body 1 and is hinged to the testing box body 1. During testing, the maintenance personnel set the adjusting rod 21 to an upright position and deflect the positioning part of the support frame 22 relative to the adjusting rod 21 to horizontally support the circuit board. After maintenance, the support assembly 2 can be folded down and stored in the hidden space 10. This fixture integrates the testing box body 1 and the support assembly 2 into one unit, making it easy for maintenance personnel to carry. Furthermore, maintenance personnel can quickly build a test bench for circuit board testing using this fixture, thereby improving testing efficiency.

[0051] like Figure 1 and Figure 2 As shown in the embodiment of this utility model, the support frame 22 includes a connecting rod 221, a mounting plate 222, and two support rods 223 constituting a positioning part. One end of the connecting rod 221 is movably hinged to the adjusting rod 21, and the other end of the connecting rod 221 is provided with the mounting plate 222. The deflection angle of the connecting rod 221 relative to the adjusting rod 21 is set to 90°. The two support rods 223 are sequentially spaced along the length direction of the mounting plate 222 and are movably disposed on the mounting plate 222.

[0052] like Figure 3As shown, in this embodiment of the invention, each of the two support rods 223 has a stepped portion 2231 for correspondingly positioning the two ends of the circuit board. The stepped portion 2231 supports the circuit board, while the main body of the support rod 223 provides lateral positioning of the circuit board. By moving the two support rods 223, the circuit board is secured between the main bodies of the two support rods 223, thereby preventing the circuit board from slipping off the support rods 223 during testing. Specifically, see... Figure 3 The support rod 223 is L-shaped, with the vertical part being the main body and the horizontal part being the step 2231.

[0053] like Figure 3 As shown in this embodiment of the invention, the support frame 22 further includes a first limiting member 224 rotatably disposed on the support rod 223. The first limiting member 224 is used to rotate to be opposite to the step portion 2231 to lock the circuit board onto the step portion 2231. The first limiting member 224 and the step portion 2231 cooperate to limit the circuit board from the height direction, preventing the circuit board from falling off the support rod 223 during the inspection process due to maintenance personnel touching the circuit board from below.

[0054] Specifically, the first limiting member 224 is elongated. During testing, the first limiting member 224 can be rotated to face the step portion 2231. Before or after testing, the first limiting member 224 can be rotated to rest completely on the platform of the main body, allowing maintenance personnel to insert or remove the circuit board. Furthermore, there are multiple first limiting members 224, arranged at intervals along the length of the support rod 223. In a specific embodiment of this utility model, each support rod 223 is provided with four first limiting members 224.

[0055] like Figure 3As shown in this embodiment of the invention, a limiting groove 2232 extending along the length direction is also formed on the step portion 2231. The support frame 22 also includes a second limiting member 225 slidably disposed within the limiting groove 2232. The second limiting member 225 is used to press the circuit board onto the mounting plate 222. By adjusting the position of the second limiting member 225 and the relative distance between the two support rods 223, rectangular spaces of different lengths and widths can be formed to accommodate different circuit boards, thereby limiting the circuit board in the horizontal direction and ensuring the stability of the circuit board during the testing process. Specifically, the limiting groove 2232 passes through the step portion 2231. The second limiting member 225 includes a limiting block and a fixing bolt, which are respectively disposed on the upper and lower sides of the step portion 2231. The limiting block is used to abut against the circuit board, and the fixing bolt is threadedly connected to the limiting block. By turning the fixing bolt, the relative distance between the limiting block and the fixing bolt can be adjusted, thereby fixing and loosening the limiting block. After placing the circuit board, the limiting block is abutted against the circuit board, and then the fixing bolts are tightened to fix the limiting block, thereby ensuring the stability of the circuit board during the testing process. Of course, this utility model is not limited to this. The second limiting member 225 can also be connected to the step part 2231 through a compression spring, and the circuit board is pressed tightly onto the mounting plate 222 by the elastic force of the compression spring.

[0056] like Figure 2 As shown in this embodiment of the invention, the connecting rod 221 includes a first rod segment 2211 and a second rod segment 2212 connected in sequence. The first rod segment 2211 is movably hinged to the adjusting rod 21, and the second rod segment 2212 is provided with a mounting plate 222. The second rod segment 2212 is rotatably configured relative to the first rod segment 2211. This tooling is mainly used for maintenance personnel to carry when going out. Unlike general laboratories, outdoor sites lack flat surfaces, and the test box body 1 may tilt. Therefore, the tilt angle of the positioning part relative to the test box body 1 can be adjusted by the rotatably configured second rod segment 2212 to keep the positioning part horizontal, so that maintenance personnel can test the circuit board. In addition, if the test box body 1 is placed in a high position, the circuit board can be made to face the maintenance personnel by rotating the second rod segment 2212 to facilitate testing. Furthermore, due to the provision of the first limiting member 224 and the second limiting member 225, even if the circuit board is flipped by the second rod segment 2212, the stability of the circuit board will not be affected.

[0057] In this embodiment of the utility model, one end of each support rod 223 extends into the adjustment groove 2221 from the lateral opening of the adjustment groove 2221, and the mounting plate 222 is also provided with a position adjustment opening communicating with the adjustment groove 2221. The position adjustment opening allows fasteners to extend into the adjustment groove 2221 and fix the support rod 223.

[0058] like Figure 6 and Figure 7As shown in this embodiment of the invention, the support rod 223 is detachably connected to the mounting plate 222. The mounting plate 222 has an adjusting groove 2221 on the side facing the circuit board for moving the two support rods 223, and two connecting holes 2222 on the side facing away from the circuit board for inserting the two support rods 223. When storing the bracket assembly 2, the support rods 223 can be inserted into the connecting holes 2222, thereby reducing the overall length of the bracket assembly 2. Correspondingly, the length of the test box body 1 and the hidden space 10 only needs to meet the total length from the adjusting rod 21 to the mounting plate 222 in the bracket assembly 2. Before testing, the support rods 223 can be removed from the connecting holes 2222 and placed in the adjusting groove 2221. Specifically, the top of the mounting plate 222 is provided with a slot, and one end of the support rod 223 that extends into the adjusting slide 2221 has a threaded hole aligned with the slot. The bracket assembly 2 also includes a bolt that passes through the slot and connects to the support rod 223. The support rod 223 can be fixed or loosened by turning the bolt. When storing, the bolt is removed and the support rod 223 is taken out from the adjusting slide 2221.

[0059] Specifically, the shape of the hidden space 10 is based on the shape of the bracket assembly 2, see [reference]. Figure 1 and Figure 5 The hidden space 10 includes a first hidden slot, a second hidden slot, and a third hidden slot connected in sequence. The first hidden slot is opened along the length of the detection box body 1 to accommodate the adjusting rod 21 and the connecting rod 221. The second hidden slot extends from the first hidden slot away from the hinge point between the adjusting rod 21 and the detection box body 1 along the width of the detection box body 1 to both sides to accommodate the mounting plate 222. There are two third hidden slots, which are located on both sides of the first hidden slot and are arranged parallel to the first hidden slot to accommodate two support rods 223.

[0060] like Figure 4 As shown in this embodiment of the invention, the top surface 216 of the adjusting rod 21 extends to form a first ear plate 214 and a second ear plate 215 that are spaced apart from each other. A middle ear plate 2213 extends from the end of the connecting rod 221 near the adjusting rod 21. The middle ear plate 2213 is connected in series between the first ear plate 214 and the second ear plate 215 via a connecting shaft. The middle ear plate 2213 is used to abut against the top surface 216 of the adjusting rod 21 when the connecting rod 221 is deflected 90° relative to the adjusting rod 21. Specifically, the end of the middle ear plate 2213 away from the first rod segment 2211 is set in an arc shape to ensure that the first rod segment 2211 can rotate smoothly around the connecting shaft.

[0061] like Figure 4As shown in this embodiment of the invention, the adjusting rod 21 includes a fixed rod portion 211 and a lifting rod portion 212 passing through the fixed rod portion 211. The fixed rod portion 211 is movably hinged to the test box body 1, and the end of the lifting rod portion 212 away from the fixed rod portion 211 is movably hinged to the support frame 22. A fixing member 213 is provided on the side wall of the fixed rod portion 211. The fixing member 213 can be screwed on and used to abut against and fix the lifting rod portion 212. By adjusting the lifting rod portion 212, the height of the circuit board can be freely raised or lowered within a certain range. The testing personnel can adjust the circuit board to a suitable height according to the placement position of the test box body 1 and their own operating habits to facilitate their testing operations.

[0062] Specifically, a threaded hole is provided on the side wall of the fixed rod 211, and the fixing member 213 is a threaded member. By turning the threaded member, the lifting rod 212 can be fixed or loosened, thereby adjusting the height of the circuit board. Of course, this utility model is not limited to this. The upper end of the fixed rod 211 can be set as a retractable and expandable threaded tube. A nut is fitted on the threaded tube. The inner diameter of the nut is set in a gradually decreasing manner. By turning the nut, the diameter of the threaded tube can be adjusted, thereby pressing or loosening the lifting rod 212.

[0063] In this embodiment of the invention, the testing box body 1 is further provided with a testing pen placement area 17 for accommodating testing pens. The testing pen placement area 17 is located near one of the side panels of the testing box, and the side panel is provided with a door panel that can open or close the testing pen placement area 17. By providing the testing pen placement area 17, the testing pens can be stored separately, which is convenient for preservation and transportation. Furthermore, the testing pen placement area 17 can be opened or closed separately through the door panel on the side panel, and the process of taking out and putting in the testing pens does not affect the placement of the circuit boards.

[0064] In this embodiment of the invention, a chip emulator 13 is also provided inside the detection box body 1. The chip emulator 13 is used to send analog signals to the circuit board. An analog output interface 101 is provided at the bottom of the hidden space 10. The analog output interface 101 is used for communication between the circuit board and the chip emulator 13 via signal lines. Thus, this fixture integrates simulation and detection. By sending analog signals to trigger different electronic components on the circuit board, and then using directional detection signals, it can help maintenance personnel determine the cause of the circuit board failure. The analog output interface 101 is located at the bottom of the hidden space 10, and the signal lines are connected to the circuit board from below, avoiding the signal lines from being laid on the front of the circuit board (i.e., the side where the main electronic components are located), thereby reducing interference to maintenance personnel.

[0065] Specifically, see Figure 1 and Figure 8In a specific embodiment of this utility model, the detection box body 1 is a plastic box design with a high-strength ABS blister shell. One side panel has a handle 18 for handling. The dimensions of the detection box body 1 are L470.00×W370.00×H330.00. The interior of the detection box body 1 is hollowed out and houses a logic analyzer 11, an oscilloscope 12, a chip emulator 13, a CAN tool 14, a battery 16, a power supply 15 (including a 13.5V 10A boost power supply 15 and an AC-DC 200W charging power supply 15), and a small signal transmitter. The test box body 1 features a generator and a USB 3.0 hub. The top panel has a hidden space 10 and an emulation output interface 101. The emulation output interface 101 includes multiple standard interfaces, compatible with various signal lines used in automotive information system domain controller PCBAs on the market. The front panel of the test box body 1 houses a test interface 19, which includes four oscilloscope probe interfaces 12, five logic analyzer interfaces 11, a USB 3.0 communication interface (for connecting the test box body 1 to a laptop computer), and a USB 3.0 charging interface. The rear panel of the test box body 1 has a door panel and a power interface 15.

[0066] The onboard information system domain controller PCBA in the testing station is powered on after being connected to the simulation output interface 101; the USB 3.0 communication interface is connected to the computer's USB 3.0 interface, and the USB 3.0 charging connector is connected to a 13.5V 10.5A 130W charger to provide power to the testing box body 1; the oscilloscope 12 can be used to test the waveforms on the PCBA and display the waveforms on the laptop computer screen; the logic analyzer 11 can be used to test the logic signals on the PCBA and display the waveforms on the laptop computer screen.

[0067] This circuit board testing fixture can basically realize the functional verification of the vehicle information system domain controller host PCBA, thereby helping after-sales technicians to quickly and accurately determine whether the vehicle information system domain controller host and its peripheral components are good products. The scope covers the peripheral components of the current mainstream automotive vehicle information system domain controller host, greatly reducing the volume burden of peripheral components carried by technicians and the time spent setting up temporary test bench platforms, saving 90% of the judgment time.

[0068] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A circuit board testing fixture, characterized in that, The circuit board testing fixture includes: The detection box body (1) has a detection interface (19) for connecting to the detection pen and can analyze the detection signal of the detection pen. The surface of the detection box body (1) has a recessed hidden space (10). The bracket assembly (2) can be folded down and housed in the hidden space (10) and includes an adjusting rod (21) and a support frame (22). One end of the adjusting rod (21) is placed in the hidden space (10) and is movably hinged to the detection box body (1). The support frame (22) is movably hinged to the other end of the adjusting rod (21) and has a positioning part for supporting the circuit board upward. The positioning part is used to deflect relative to the adjusting rod (21) when the adjusting rod (21) switches from a folded state to an upright state, so as to horizontally support the circuit board.

2. The circuit board testing fixture according to claim 1, characterized in that, The support frame (22) includes a connecting rod (221), a mounting plate (222), and two support rods (223) constituting the positioning part. One end of the connecting rod (221) is movably hinged to the adjusting rod (21), and the other end of the connecting rod (221) is provided with the mounting plate (222). The deflection angle of the connecting rod (221) relative to the adjusting rod (21) is set to 90°. The two support rods (223) are sequentially spaced along the length direction of the mounting plate (222) and are movably disposed on the mounting plate (222).

3. The circuit board testing fixture according to claim 2, characterized in that, Both of the support rods (223) have stepped portions (2231) formed on them, so that the two ends of the circuit board can be positioned in a corresponding manner.

4. The circuit board testing fixture according to claim 3, characterized in that, The support frame (22) further includes a first limiting member (224) rotatably disposed on the support rod (223), the first limiting member (224) being used to rotate to be disposed opposite to the step portion (2231) to lock the circuit board onto the step portion (2231).

5. The circuit board testing fixture according to claim 3, characterized in that, The stepped portion (2231) is also provided with a limiting groove (2232) extending along the length direction. The support frame (22) also includes a second limiting member (225) slidably disposed in the limiting groove (2232). The second limiting member (225) is used to press the circuit board onto the mounting plate (222).

6. The circuit board testing fixture according to claim 2, characterized in that, The connecting rod (221) includes a first rod segment (2211) and a second rod segment (2212) connected in sequence. The first rod segment (2211) is movably hinged to the adjusting rod (21). The second rod segment (2212) is provided with the mounting plate (222), and the second rod segment (2212) is rotatably disposed relative to the first rod segment (2211). And / or, the mounting plate (222) is used to form an adjustment groove (2221) on one side facing the circuit board, one end of each support rod (223) extends into the adjustment groove (2221) from the lateral opening of the adjustment groove (2221), and the mounting plate (222) is also provided with a position adjustment opening communicating with the adjustment groove (2221), the position adjustment opening allowing fasteners to extend into the adjustment groove (2221) and fix the support rod (223).

7. The circuit board testing fixture according to claim 2, characterized in that, The top surface (216) of the adjusting rod (21) extends to form a first ear plate (214) and a second ear plate (215) that are spaced apart from each other. The connecting rod (221) has an intermediate ear plate (2213) extending from one end near the adjusting rod (21). The intermediate ear plate (2213) is connected in series between the first ear plate (214) and the second ear plate (215) via a connecting shaft. The intermediate ear plate (2213) is used to abut against the top surface (216) of the adjusting rod (21) when the connecting rod (221) is deflected 90° relative to the adjusting rod (21).

8. The circuit board testing fixture according to any one of claims 1 to 7, characterized in that, The adjusting rod (21) includes a fixed rod part (211) and a lifting rod part (212) passing through the fixed rod part (211). The fixed rod part (211) is movably hinged to the detection box body (1). The end of the lifting rod part (212) away from the fixed rod part (211) is movably hinged to the support frame (22). A fixing member (213) is provided on the side wall of the fixed rod part (211). The fixing member (213) can be screwed on and is used to abut and fix the lifting rod part (212).

9. The circuit board testing fixture according to any one of claims 1 to 7, characterized in that, The detection box body (1) is also provided with a detection pen placement area (17) for accommodating the detection pen. The detection pen placement area (17) is located near one of the side panels of the detection box body (1), and the side panel is provided with a door panel that can open or close the detection pen placement area.

10. The circuit board testing fixture according to any one of claims 1 to 7, characterized in that, The detection box body (1) is also used to send analog signals to the circuit board. The bottom of the hidden space (10) is provided with an analog output interface (101), which is used to allow the circuit board and the detection box body (1) to communicate and connect via signal lines.

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