A positioning device for circuit board testing

Abstract

This utility model discloses a positioning device for testing circuit boards, including a protective plate with an upward-opening receiving groove for accommodating the circuit board to be tested; an upper pressure plate, which is vertically oriented and switchable between a first position and a second position; a probe adapter plate located below the protective plate; a probe, which is vertically inserted through the protective plate; and a support block, which is vertically slidably disposed inside the receiving groove and has a first elastic element between it and the inner wall of the receiving groove. When placing the circuit board, the support block in the receiving groove first supports the circuit board, leaving a gap between the circuit board and the probe. When the upper pressure plate switches from the first position to the second position, it presses the circuit board down, squeezing it until it comes into contact with the probe. This design prevents the circuit board from contacting the probe during circuit board transfer, ensuring that the probe position remains unchanged during each circuit board test and guaranteeing the accuracy of each test result.

Description

Technical Field

[0001] This utility model belongs to the field of circuit board testing technology, and specifically relates to a positioning device for circuit board testing. Background Technology

[0002] To test the functionality of circuit boards, testing devices have been designed. Current testing devices typically include a protective plate, a pressure plate, and probes. The protective plate is made of insulating material and has an upward-opening receiving slot to hold the circuit board to be tested. The pressure plate, also made of insulating material, is located above the protective plate and presses the circuit board firmly against the bottom of the receiving slot. The probes, made of conductive material, extend vertically; their upper ends protrude from the bottom of the receiving slot and are used for electrical connection with the circuit board, while their lower ends are electrically connected to an external testing device. However, the following problems exist: when the circuit board is placed in the testing position, it directly contacts the probes, and friction exists between them. Repeated replacement of the circuit board can affect the probe position due to friction, ultimately affecting the accuracy of the test results. Utility Model Content

[0003] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a positioning device for circuit board testing.

[0004] The technical solution adopted in this utility model is as follows: A positioning device for testing circuit boards includes a protective plate with an upwardly opening receiving groove for accommodating the circuit board to be tested; an upper pressure plate positioned above the protective plate and switchable between a first position and a second position along a vertical direction; a probe adapter plate located below the protective plate; a probe vertically penetrating the protective plate, with one end of the probe placed in the receiving groove and the other end electrically connected to the probe adapter plate; and a support block slidably disposed vertically inside the receiving groove, with a first elastic element disposed between the support block and the inner wall of the receiving groove for supporting the circuit board to be tested; wherein, when the upper pressure plate is switched to the second position, the circuit board, the probe, the probe adapter plate, and an external testing device form a test circuit.

[0005] For example, it also includes a lower pressure plate, which is disposed below the guard plate and connected to the guard plate through a second elastic member; and a positioning structure, which is disposed between the upper pressure plate and the guard plate so that when the upper pressure plate switches from the first position to the second position, the upper pressure plate and the guard plate are docked.

[0006] For example, the positioning structure includes a positioning post and a positioning hole, wherein the outer peripheral wall of the positioning post cooperates with the inner peripheral wall of the positioning hole and allows the positioning post to slide vertically within the positioning hole.

[0007] For example, the positioning post extends vertically and is fixedly connected to the upper pressure plate, and the positioning hole extends vertically through the guard plate.

[0008] For example, the positioning post has a guide portion, which is truncated conical in shape and has its smaller diameter side close to the guard plate.

[0009] For example, the positioning hole includes a first through hole and a second through hole. The first through hole is disposed on the guard plate, and the second through hole is disposed on the lower pressure plate. The first through hole and the second through hole are concentrically disposed in the vertical direction.

[0010] For example, the projection of the first through hole on the upper pressure plate in the vertical direction is completely within the projection of the second through hole on the upper pressure plate in the vertical direction.

[0011] For example, the upper pressure plate includes a plurality of clamping posts, each of which extends vertically so that the upper pressure plate presses against the circuit board when switched to the second position.

[0012] For example, the cover has a connecting groove that communicates with the receiving groove to provide operating space for picking up and putting down the circuit board.

[0013] The beneficial effects of this utility model are as follows: When placing the circuit board, the device first supports the circuit board with a support block in the receiving groove. Under the action of the first elastic element, a gap is left between the circuit board and the probe. When the upper pressure plate switches from the first position to the second position, it presses the circuit board and squeezes it downward to make it contact the probe. This setting can prevent the circuit board from contacting the probe during the transfer of the circuit board, thus not affecting the position of the probe. This ensures that the position of the probe does not change when the circuit board is tested, and ensures the accuracy of the test results. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 This is a schematic diagram of the upper pressure plate of this utility model in the first position; Figure 2 This is a schematic diagram of the upper pressure plate of this utility model located in the second position; Figure 3 This is a schematic diagram of the overall structure of this utility model; Figure 4 This is a structural schematic diagram of the protective plate, the lower pressure plate, and the probe connecting plate of this utility model; Figure 5 This is a structural schematic diagram of the upper pressure plate, the pressing column and the positioning column (810) of this utility model.

[0016] In the diagram: 100-Guard plate; 110-Receiving groove; 120-Connecting groove; 200-Upper pressure plate; 300-Probe connecting plate; 400-Probe; 500-Supporting block; 600-First elastic element; 700-Lower pressure plate; 710-Second elastic element; 800-Positioning structure; 810-Positioning post; 811-Guide part; 820-Positioning hole; 821-First through hole; 822-Second through hole; 900-Clamping post. Detailed Implementation

[0017] In the following description, numerous details are provided to enable a thorough understanding of this application. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the application, and that the application can be implemented without one or more of these details. Furthermore, to avoid confusion with this application, some technical features well-known in the art have not been described in detail.

[0018] To fully understand the embodiments of this application, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0019] This application provides a positioning device for testing circuit boards, including a protective plate 100 with an upwardly opening receiving groove 110 for accommodating the circuit board to be tested; an upper pressure plate 200 positioned above the protective plate 100 and switchable between a first position and a second position along the vertical direction; a probe 400 adapter plate positioned below the protective plate 100; a probe 400 penetrating through the protective plate 100 along the vertical direction, with one end of the probe 400 placed in the receiving groove 110 and the other end of the probe 400 electrically connected to the probe 400 adapter plate; and a support block 500 slidably disposed within the receiving groove 110 along the vertical direction, with a first elastic member 600 between the support block 500 and the inner wall of the receiving groove 110 for supporting the circuit board to be tested; wherein, when the upper pressure plate 200 is switched to the second position, the circuit board, the probe 400, the probe 400 adapter plate, and the external testing device form a test circuit.

[0020] During use, when the upper pressure plate 200 is in its first position, the circuit board can be placed on the support block 500. The first elastic element 600, located between the protective plate 100 and the support block 500, provides elasticity to the support block 500, and the elasticity is greater than the weight of the circuit board. At this time, there is a certain distance between the circuit board and the probe 400, and the circuit board cannot form a test circuit with the probe 400, the probe 400 adapter board, and the external testing device. When the upper pressure plate 200 is switched to the second position, the upper pressure plate 200 will act on the upper surface of the circuit board. Under the action of external force, the support block 500 will also compress the first elastic element 600 between itself and the protective plate 100. At this time, the circuit board will just be in contact with the probe 400, so that the circuit board, the probe 400, the probe 400 adapter board, and the external testing device form a test circuit, which can be used to test the circuit board with external testing devices from various countries. This device design prevents the circuit board from contacting the probe 400 during circuit board transfer, thus preventing friction between the circuit board and the probe 400 from affecting the position of the probe 400 during the transfer process. This ensures that the position of the probe 400 remains unchanged each time the circuit board is tested. Furthermore, even when the external testing device is not turned off, it will not directly contact the unpressed circuit board, thus affecting the testing structure. This provides better protection for both the circuit board and the probe 400, and is more conducive to improving testing efficiency.

[0021] In some embodiments, the system further includes a lower pressure plate 700 disposed below the guard plate 100 and connected to the guard plate 100 via a second elastic member 710; and a positioning structure 800 disposed between the upper pressure plate 200 and the guard plate 100, so that when the upper pressure plate 200 is switched from the first position to the second position, the upper pressure plate 200 docks with the guard plate 100.

[0022] Due to prolonged use of the equipment, and the fact that the upper pressure plate 200 switches between the first and second positions after each circuit board test, the parallelism between the upper pressure plate 200, the guard plate 100, and the lower pressure plate 700 cannot be guaranteed. This means that when the upper pressure plate 200 switches to the second position, it cannot accurately press the circuit board, affecting the test results. This device addresses this by setting a second elastic element 710 between the lower guard plate 100 and the guard plate 100, and a positioning mechanism between them. This design allows the upper pressure plate 200 to be positioned correctly even when it is not in the lower position. When the circuit board is lowered to the second position (without pressing it down), under the action of the positioning structure 800, the second elastic element 710 can extend or contract to different degrees, adjusting the guard plate 100 to be parallel to the upper pressure plate 200. This allows for precise docking between the upper pressure plate 200 and the guard plate 100. This design ensures that the circuit board is accurately pressed each time it is tested, preventing the circuit board from failing to contact the probe 400 due to uneven force. This enhances the stability and reliability of the device.

[0023] In some embodiments, the positioning structure 800 includes a positioning post 810 and a positioning hole 820. The outer peripheral wall of the positioning post 810 cooperates with the inner peripheral wall of the positioning hole 820, allowing the positioning post 810 to slide vertically within the positioning hole 820.

[0024] After the positioning pin 810 is inserted into the positioning port, the outer peripheral wall of the positioning pin 810 will act on the inner peripheral wall of the positioning hole (820), generating a force perpendicular to the vertical direction, thereby adjusting the position of the guard plate 100 in the vertical direction. Since the positioning pin 810 and the positioning hole 820 can only slide relative to each other in the vertical direction, the guard plate 100 and the upper pressure plate 200 can be kept in a parallel state.

[0025] In some embodiments, the positioning post 810 extends vertically and is fixedly connected to the upper pressure plate 200, and the positioning hole 820 penetrates vertically through the guard plate 100.

[0026] In another embodiment, the positioning post 810 extends vertically and is fixedly connected to the guard plate 100, and the positioning hole 820 extends vertically through the upper pressure plate 200.

[0027] Regardless of the configuration of either of the two embodiments described above, the positioning pin 810 and the positioning hole 820 can be used to adjust the parallelism between the guard plate 100 and the upper pressure plate 200. Therefore, the specific configuration of the positioning pin 810 and the positioning hole 820 is not limited. The mechanism in the figure and the embodiments described below are based on one of the two embodiments described above.

[0028] In some embodiments, the positioning post 810 has a guide portion 811, which is truncated cone-shaped and has the side with the smaller cross-sectional diameter close to the guard plate 100.

[0029] The guide part 811 in the positioning post 810 can first act on the positioning hole 820 when the upper pressure plate 200 and the guard plate 100 are not parallel. By using the outer surface of the truncated cone structure of the guide part 811, the concentricity of the positioning hole 820 and the positioning post 810 can be adjusted, thereby making the guard plate 100 parallel to the upper pressure plate 200.

[0030] In some embodiments, the positioning hole 820 includes a first through hole 821 and a second through hole 822. The first through hole 821 is disposed on the guard plate 100, and the second through hole 822 is disposed on the lower pressure plate 700. The first through hole 821 and the second through hole 822 are concentrically disposed in the vertical direction.

[0031] The concentric arrangement of the first through hole 821 and the second through hole 822 allows the positioning rod to pass smoothly through the first through hole 821 and the second through hole 822, thereby allowing the positioning post 810 to cooperate with the positioning hole 820 to complete the precise docking of the upper pressure plate 200 and the guard plate 100.

[0032] In some embodiments, the projection of the first through hole 821 on the upper pressure plate 200 in the vertical direction is completely within the projection of the second through hole 822 on the upper pressure plate 200 in the vertical direction.

[0033] The device is designed so that the projection of the first through hole 821 on the upper pressure plate 200 in the vertical direction is completely within the projection of the second through hole 822 on the upper pressure plate 200 in the vertical direction. This indicates that the diameter of the second through hole is larger than that of the first through hole 821. When the positioning pin 810 is inserted into the positioning hole 820, it will cooperate with the inner wall of the first through hole 821 to achieve precise docking between the upper pressure plate 200 and the guard plate 100. The fact that the diameter of the second through hole 822 is larger than that of the first through hole 821 can avoid the phenomenon that the positioning pin 810 cannot be fully inserted due to the guard plate 100 and the lower pressure plate 700 not being completely parallel.

[0034] In some embodiments, the upper pressure plate 200 includes a plurality of clamping posts 900, each clamping post 900 extending vertically so that the upper pressure plate 200 presses against the circuit board when switched to the second position.

[0035] The clamping column 900 can be fixedly connected to the upper pressure plate 200. During the process of switching the upper pressure plate 200 from the first position to the second position, it presses on the top of the circuit board. When the upper pressure plate 200 is in the second position, the clamping column 900 can cooperate with the support block 500 to clamp the circuit board on the upper and lower sides respectively, thereby achieving the effect of fixing the circuit board.

[0036] In embodiments not shown, the connection between the clamping post 900 and the upper pressure plate 200 can also be detachable, and the position of the clamping post 900 can be changed according to different circuit boards. This setting can effectively allow the clamping post 900 to avoid electronic components on the circuit board, making the device more practical and also preventing the clamping post 900 from damaging the electronic components.

[0037] In some embodiments, the guard plate 100 has a connecting groove 120 communicating with the receiving groove 110 to provide operating space for picking up and putting down the circuit board.

[0038] During use, to better secure the circuit board, the contour of the receiving groove 110 is typically designed to match the outer contour of the circuit board. This ensures better fixation of the circuit board. Furthermore, to provide space for gripping the circuit board, a connecting groove 120 is provided at the edge of the receiving groove 110. This device can be used with automatic or manual feeding methods. For example, with an automatic feeding mechanism using a robotic arm, the robotic arm grips the edge of the circuit board and places it onto the support block 500 in the receiving groove 110. The connecting groove 120 provides space for the robotic arm's gripping components to perform the gripping action, facilitating circuit board loading. In a manual feeding method, the operator grips the circuit board with their fingers, placing it in the receiving groove 110. The connecting groove 120 provides space for the operator's fingers, allowing them to easily reach the edge of the circuit board for gripping.

[0039] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A positioning device for testing a circuit board, characterized by: include A protective plate (100) having an upwardly opening receiving groove (110) for accommodating a circuit board to be tested; An upper pressure plate (200) is positioned above the guard plate (100) and is switchable between a first position and a second position along the vertical direction. The probe (400) adapter plate is located below the protective plate (100); A probe (400) is disposed through the guard plate (100) along the vertical direction, with one end of the probe (400) placed in the receiving groove (110) and the other end of the probe (400) electrically connected to the probe (400) adapter plate. A support block (500) is slidably disposed inside the receiving groove (110) along the vertical direction, and a first elastic element (600) is provided between the support block (500) and the inner wall of the receiving groove (110) for supporting the circuit board to be tested. When the upper pressure plate (200) is switched to the second position, the circuit board, probe (400), probe (400) adapter board and external test device form a test circuit.

2. The positioning device for testing a circuit board according to claim 1, wherein: The positioning device also includes A lower pressure plate (700) is disposed below the guard plate (100) and is connected to the guard plate (100) via a second elastic member (710); A positioning structure (800) is disposed between the upper pressure plate (200) and the guard plate (100) so that when the upper pressure plate (200) switches from the first position to the second position, the upper pressure plate (200) and the guard plate (100) are docked.

3. The positioning device for testing a circuit board according to claim 2, wherein: The positioning structure (800) includes a positioning post (810) and a positioning hole (820). The outer peripheral wall of the positioning post (810) cooperates with the inner peripheral wall of the positioning hole (820) and allows the positioning post (810) to slide in the vertical direction within the positioning hole (820).

4. The positioning device for testing a circuit board according to claim 3, wherein: The positioning post (810) extends along the vertical direction and is fixedly connected to the upper pressure plate (200), and the positioning hole (820) penetrates through the guard plate (100) along the vertical direction.

5. The positioning device for testing a circuit board according to claim 3 or 4, wherein: The positioning post (810) has a guide portion (811), which is truncated cone-shaped and has its smaller diameter side close to the guard plate (100).

6. The positioning device for testing a circuit board according to claim 3, wherein: The positioning hole (820) includes a first through hole (821) and a second through hole (822). The first through hole (821) is disposed on the guard plate (100), and the second through hole (822) is disposed on the lower pressure plate (700). The first through hole (821) and the second through hole (822) are concentrically disposed in the vertical direction.

7. The positioning device for testing a circuit board according to claim 6, wherein: The projection of the first through hole (821) on the upper pressure plate (200) along the vertical direction is completely within the projection of the second through hole (822) on the upper pressure plate (200) along the vertical direction.

8. The positioning device for testing a circuit board according to claim 1, wherein: The upper pressure plate (200) includes a plurality of pressure posts (900), each of the pressure posts (900) extending along the vertical direction so that when the upper pressure plate (200) is switched to the second position, it presses on the circuit board.

9. The positioning device for testing a circuit board according to claim 1, wherein: The protective plate (100) has a connecting groove (120) that communicates with the receiving groove (110) to provide operating space for taking out and placing the circuit board.

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