PCB voltage test tool

Abstract

The utility model discloses a PCB voltage testing tool in the technical field of circuit testing, and aims to solve the problem that the existing voltage testing tool is inconvenient to operate in the prior art. The device comprises a positioning plate and a test pen assembly, the positioning plate comprises a substrate and an adsorption groove formed in the substrate and used for adsorbing a PCB, the adsorption groove is communicated with the air exhaust end of a negative pressure generation device, and the test pen assembly comprises two test rods and a U-shaped reed used for connecting the two test rods. One end, far away from the U-shaped reed, of each test rod is provided with a connecting contact chip, and the two connecting contact chips are used for connecting a test circuit; the lead-out wire testing device is used for carrying out resistance circuit testing on the lead-out wire of the PCB, can be used for conveniently carrying out single-hand testing on various small lead-out wires, is helpful for testing personnel to carry out other auxiliary operations without hands, and avoids inconvenience in the measuring process.

Description

Technical Field

[0001] This utility model relates to a PCB board voltage testing fixture, belonging to the field of PCB circuit testing technology. Background Technology

[0002] In some existing PCB products, to facilitate the encapsulation of resistors on the PCB, a method of integrating corresponding resistor circuits on the PCB using carbon film printing and drying is proposed. However, due to the instability of the printing process and the accuracy requirements of actual use, laser trimming is used to laser-etch the dried carbon film resistor circuit to adjust the resistance value of the carbon film resistor. To confirm the effect of laser trimming or to confirm the actual resistance value of a section of carbon film resistor, a multimeter or other testing equipment is required to position and measure on the carbon film. However, due to the unstable contact between the test contacts and the carbon film surface, measurement deviations can easily occur and damage the surface of the carbon film resistor. To reduce this test deviation, additional lead-out lines can be set on the PCB for convenient testing. However, the area required for these lead-out lines is relatively small and cannot affect the layout of the PCB and the normal use of the product. Therefore, to facilitate stable testing of these lead-out lines, a testing fixture is urgently needed to facilitate personnel operation and optimize the measurement process. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a PCB voltage testing fixture for testing the resistance circuit of PCB leads. It can facilitate one-handed testing of various small leads, freeing up the tester's hands to perform other auxiliary tasks and avoiding inconvenience to the measurement process.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] This utility model provides a PCB board voltage testing fixture, including a positioning plate and a test pen assembly. The positioning plate includes a base plate and an adsorption groove formed on the base plate for adsorbing the PCB board. The adsorption groove is connected to the suction end of a negative pressure generating device. The test pen assembly includes two test rods and a U-shaped spring for connecting the two test rods. Each of the two test rods has a connecting contact at the end away from the U-shaped spring, and the two connecting contacts are used to connect the test circuit.

[0006] Specifically, each of the two test rods has a positioning groove on its opposite side, and a limit ring is engaged on the two positioning grooves located on different sides.

[0007] Specifically, each of the two test rods is provided with a limiting groove at its end, and the two connecting contact pieces are slidably disposed in the corresponding limiting grooves. A push plate and an elastic element for driving the push plate to abut against the connecting contact piece are also slidably disposed in the limiting groove.

[0008] Specifically, the upper surface of the substrate is provided with an adjustment groove that extends horizontally through both sides of the substrate. Two opposing positioning blocks are slidably disposed in the adjustment groove. Mounting plates are provided on both sides of the substrate, and each mounting plate is threaded with an adjustment bolt that can abut against the corresponding positioning block.

[0009] Specifically, it also includes a test integrated packaging box, which includes a box body and a cover. The positioning plate is installed inside the box body, and the cover is provided with a packaging test circuit and wiring terminals for connecting the packaging test circuit. The test pen assembly is also provided with test wires that can be connected to the wiring terminals.

[0010] Specifically, a display is also installed on the cover, a battery is installed inside the box, and a charging port for connecting the battery is provided on the outside of the box.

[0011] Specifically, the box is equipped with an air inlet pipe and the outside of the box is equipped with an air inlet pipe that communicates with the air inlet pipe.

[0012] Specifically, the box body and the cover body are hinged together, and the box body is provided with a telescopic rod for driving the cover body to open.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0014] The PCB voltage testing fixture provided by this utility model uses a U-shaped spring to drive two test rods to move away from each other. This allows personnel to control the distance between the test points at the ends of the two test rods by gripping them during manual testing. This facilitates the matching of the test ends with the small leads on the PCB, making it easier for testing personnel to operate, improving testing speed and accuracy, and to some extent avoiding scratches on the carbon film resistors caused by misoperation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the testing fixture provided in this embodiment of the utility model;

[0016] Figure 2 This is a utility model Figure 1 Enlarged view of section A of the test fixture provided in the embodiment;

[0017] Figure 3 This is a utility model Figure 1Enlarged view of section B of the test fixture provided in the embodiment;

[0018] Figure 4 This is another schematic diagram of the testing fixture provided in this embodiment of the utility model;

[0019] Figure 5 This is a partial front structural cross-sectional view of the test fixture provided in this embodiment of the utility model;

[0020] Figure 6 This is a partial sectional view of the side structure of the test fixture provided in this embodiment of the utility model;

[0021] Figure 7 This is a top view schematic diagram of a partial structure of the testing fixture provided in this embodiment of the utility model;

[0022] Reference numerals: 1. Positioning plate; 101. Base plate; 102. Adsorption groove; 103. Adjustment groove; 104. Positioning block; 105. Mounting plate; 106. Adjustment bolt; 2. Test pen assembly; 201. Test rod; 202. U-shaped spring; 203. Connecting contact piece; 204. Positioning groove; 205. Limiting ring; 206. Push plate; 207. Elastic element; 3. Test integrated packaging box; 301. Box body; 302. Cover; 303. Wiring terminal; 304. Display; 305. Telescopic rod; 4. Battery; 5. Air inlet pipe; 6. Air inlet; 7. Charging port. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., 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. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example:

[0026] This utility model provides a PCB voltage testing fixture for testing the resistance circuit of PCB leads. It facilitates one-handed testing of various small leads, freeing up the tester's hands for other auxiliary tasks and avoiding inconvenience during the measurement process. To achieve this convenient testing function, the fixture includes a positioning plate 1 and a test pen assembly 2. Specifically, the positioning plate 1 includes a substrate 101 and an adsorption groove 102 formed on the substrate 101 for adsorbing the PCB. The adsorption groove 102 is connected to the suction end of a negative pressure generating device, allowing it to fit the PCB surface for adsorption. Negative pressure is applied within the adsorption groove 102, generating suction on the PCB to prevent slippage during testing, thus ensuring the stability of the PCB during testing. To simplify operation, the test pen assembly 2 includes two test rods 201 and a U-shaped spring 202 connecting the two test rods 201. Figure 2 As shown, with this setup, the two test rods 201 open under the automatic rebound of the U-shaped spring 202. During use, the operator can control the two test rods to close and retract with one hand. By directly controlling the closing force, the distance between the ends of the two test terminals 201 is ensured during testing. To achieve resistance measurement, connecting contacts 203 are provided at the ends of the two test rods 201 furthest from the U-shaped spring 202. These two connecting contacts 203 are configured to connect the test circuit. When using this fixture, the PCB board can be positioned first, and then manually operated. The operator can control the position and distance between the two connecting contacts 203 with one hand, ensuring they correspond to the test leads on the PCB board. This frees up the operator's hand to hold the reader or stabilize the circuit board, simplifying the testing process, preventing test position deviation, improving measurement accuracy, and to some extent avoiding accidental contact that could scratch the carbon film resistor.

[0027] This utility model provides a PCB board voltage testing fixture. To facilitate the adjustment of the two connecting contact pieces 203 to two relatively stable gap positions, positioning grooves 204 are provided on the opposite sides of the two test rods 201, and limit rings 205 are engaged on the two positioning grooves 204 located on different sides. Figure 2 As shown, with this design, after the tester has pre-controlled the included angle of the two test rods 201, the limiting ring 205 matches the position of the appropriate positioning groove 204, and the rebound of the U-shaped spring 202 is used to achieve snap-fit ​​positioning, which helps to ensure the stability of the distance between the two connecting contact pieces 203 in different positions.

[0028] This utility model provides a PCB board voltage testing fixture. To avoid scratches caused by hard contact, or to ensure normal measurement even with certain positional deviations, limit grooves can be provided at the ends of both test rods 201. Figure 2 As shown, two connecting contact pieces 203 are slidably disposed in corresponding limiting grooves. At the same time, a push plate 206 and an elastic element 207 for driving the push plate 206 to abut against the connecting contact piece 203 are also slidably disposed in the limiting groove. The elastic element 207 is like a spring, used to drive the push plate 206 to drive the connecting contact piece 203 to contact the circuit board. That is, the connecting contact piece 203 can elastically contact the test position line, which can meet certain positional requirements and avoid damage to the line or the contact piece itself caused by hard contact.

[0029] This utility model provides a PCB board voltage testing fixture. To further stabilize and fix a small PCB board, an adjustment groove 103 can be provided on the upper surface of the substrate 101. Figure 3 As shown, specifically, an adjustment groove 103 can be set to extend horizontally through both sides of the substrate 101, and two opposing positioning blocks 104 can be slidably arranged in the adjustment groove 103. Mounting plates 105 are provided on both sides of the substrate 101, and adjusting bolts 106 that can abut against the corresponding positioning blocks 104 are threadedly connected to both mounting plates 105. When positioning a small PCB board, it can be placed on the substrate 101 for adsorption, or it can be positioned by multiple positioning blocks 104 as described above. The method of using adjusting bolts 106 to abut against the PCB board can effectively improve the fixing stability of the PCB board.

[0030] This utility model provides a PCB board voltage testing fixture. To facilitate timely access to the fixture during PCB board testing, the device further includes a test integrated packaging box 3. Specifically, the test integrated packaging box 3 includes a box body 301 and a cover 302. Figure 1As shown, the positioning plate 1 is installed inside the housing 301, and the cover 302 is provided with a packaging test circuit and a wiring terminal 303 for connecting the packaging test circuit. The test pen assembly 2 is also provided with test leads that can be connected to the wiring terminal 303. With the above configuration, the integrated housing 301 structure can be directly used when testing is required, providing stable placement and effective testing. By configuring relevant integrated circuits on the cover 302, it is convenient to open and maintain the circuit components, and also convenient to plug in the test pen assembly 2. In order to facilitate the observation of test readings, a display 304 can be directly installed on the cover 302. In order to facilitate high-capacity power supply, a battery 4 can be provided inside the housing 301 for easy carrying. Considering the charging problem, a charging port 7 for connecting the battery 4 can be provided on the outside of the housing 301.

[0031] This utility model provides a PCB board voltage testing fixture. To facilitate the connection of the housing 301 structure to an external negative pressure generating device for adsorption and positioning of the PCB board, an air inlet pipe 5 is provided inside the housing 301, and an air inlet port 6 communicating with the air inlet pipe 5 is provided on the outside of the housing 301. (See reference...) Figures 4-6 As shown.

[0032] This utility model provides a PCB board voltage testing fixture. To facilitate the opening of the integrated package box 3, the box body 301 and the cover 302 can be hinged. A telescopic rod 305 for driving the cover 302 to open is provided on the box body 301. The telescopic rod 305 can be electrically connected to the control unit. To facilitate the placement of the test pen assembly 2, a corresponding receiving groove can also be provided on the cover 302 for placement and installation.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A PCB board voltage test tool, characterized in that, The utility model provides a test pen assembly (2) and positioning plate (1) are included, the positioning plate (1) includes base plate (101) and the adsorption groove (102) for adsorbing PCB board opened on base plate (101), the adsorption groove (102) is connected with the air exhaust end of negative pressure generating device, the test pen assembly (2) includes two test rods (201) and the U type spring leaf (202) for connecting two test rods (201), two test rods (201) are provided with connecting contact piece (203) at the end away from U type spring leaf (202), and two connecting contact pieces (203) are used to communicate test circuit.

2. The PCB voltage test tool of claim 1, wherein, Two test rods (201) are provided with positioning groove (204) on the opposite side, and the positioning ring (205) is clamped on the positioning groove (204) on the opposite side.

3. The PCB voltage test tool of claim 1, wherein, The end of two test rods (201) is provided with limiting sliding slot, and two connecting contact pieces (203) are slidingly arranged in the corresponding limiting sliding slot, the limiting sliding slot is also slidingly provided with push plate (206) and elastic element (207) for driving push plate (206) to abut against connecting contact piece (203).

4. The PCB voltage test tool of claim 1, wherein, The upper surface of base plate (101) is also provided with adjusting groove (103), the adjusting groove (103) transversely penetrates the two sides of base plate (101), the adjusting groove (103) is slidingly provided with two oppositely arranged positioning blocks (104), and the two sides of base plate (101) are provided with mounting plates (105), and the two mounting plates (105) are threadedly connected with adjusting bolts (106) capable of abutting on the corresponding positioning blocks (104).

5. The PCB voltage test tool of claim 1, wherein, The utility model also includes a test integrated packaging box (3), the test integrated packaging box (3) includes a box body (301) and a cover body (302), the positioning plate (1) is installed in the box body (301), the cover body (302) is provided with a packaging test circuit and a wiring terminal (303) connected with the packaging test circuit, and the test pen assembly (2) is also provided with test leads capable of being connected with the wiring terminal (303).

6. The PCB voltage test tool of claim 5, wherein, The cover body (302) is also provided with a display (304), the box body (301) is provided with a battery (4), and the box body (301) is provided with a charging port (7) connected with the battery (4).

7. The PCB voltage test tool of claim 5, wherein, The box body (301) is provided with an air connection pipe (5), and the box body (301) is provided with an air connection port (6) communicated with the air connection pipe (5).

8. The PCB voltage test tool of any one of claims 5-7, wherein, The box body (301) and the cover body (302) are hingedly arranged, and the box body (301) is provided with a telescopic rod (305) for driving the cover body (302) to open.

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