A contact electrostatic voltage tester
By employing a contact adjustment structure and a design with multiple contact heads, the measurement deviation problem of contact-type electrostatic voltage testers in complex scenarios has been solved, achieving efficient and accurate electrostatic measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGJING HUIHE ELECTRONIC TECH (DONGGUAN) CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-21
AI Technical Summary
Existing contact-type static voltage testers have fixed contact head types, which cannot adapt to complex scenarios such as curved surfaces, uneven surfaces, or narrow gaps, resulting in measurement data deviations.
A contact-type static voltage tester was designed, which enables detachable connection and position adjustment of the contact head through a contact adjustment structure. It supports the replacement of various contact heads and distance adjustment, including components such as a rotating adjustment wheel, a rotating shaft, a moving rod, and a telescopic rod, to adapt to different testing scenarios.
It improves measurement accuracy and efficiency, reduces costs for multi-scenario applications, ensures the accuracy and stability of measurement data, and allows for flexible adjustments to complex shapes and spatial positions.
Smart Images
Figure CN224536091U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of antistatic technology, and in particular to a contact-type static voltage tester. Background Technology
[0002] Static electricity is prevalent in industrial production, scientific research, and daily life, and can cause numerous hazards. For example, in the electronics industry, static electricity can cause electronic components to break down, affecting product quality and production efficiency; in industries such as chemicals and petroleum, accumulated static electricity can lead to safety accidents such as fires or explosions. Therefore, accurately measuring the static voltage of an object's surface is crucial for implementing effective electrostatic protection measures. Contact-type static voltage testers measure the electrostatic potential of the object by directly contacting its surface. Compared to non-contact testers, they offer higher measurement accuracy and stability, and can more accurately acquire static voltage data, especially for weak static signals. They are suitable for high-precision scientific research experiments and industrial production scenarios.
[0003] However, the contact head types of existing contact-type static voltage testers cannot be changed for different application scenarios. If the contact head type is fixed (e.g., only a flat contact head), insufficient contact may lead to measurement data deviations when facing curved surfaces, uneven surfaces, or narrow gaps (such as electronic component pins, pipe inner walls, or precision instrument grooves). For example, when measuring the static electricity on the surface of a cylindrical conductor, the flat contact head cannot fully fit, which will affect the measurement accuracy. Utility Model Content
[0004] The purpose of this invention is to provide a contact-type static voltage tester to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A contact-type static voltage tester includes a tester body and a contact head. The front of the tester body is provided with a mounting block, and the mounting block is provided with a contact adjustment structure. The contact adjustment structure is rotatably connected to the mounting block, and the contact head is detachably connected to the contact adjustment structure. The contact adjustment structure can adjust the distance and position of the contact head.
[0006] A further technical solution includes a contact adjustment structure comprising a rotating adjustment wheel, a rotating shaft, a moving rod, and a telescopic rod. The rotating shaft is horizontally mounted on the rotating adjustment wheel, and the rotating adjustment wheel is rotatably connected to the mounting block via the rotating shaft. The rotating adjustment wheel has a plurality of equally spaced teeth. The moving rod is slidably connected to the mounting block and has a plurality of grooves that mesh with the teeth. The moving rod has a circular groove inside, and one end of the telescopic rod is fixedly connected inside the circular groove and is electrically connected to the tester body.
[0007] In a further technical solution, the telescopic rod is a three-stage telescopic moving rod.
[0008] In a further technical solution, the contact head includes a connecting part and a test head, the connecting part being detachably connected to the moving rod, and the test head being located on the connecting part.
[0009] In a further technical solution, the connecting part includes a connecting ring, on which four connecting blocks are provided at equal intervals. The end of the moving rod is provided with a connecting ring groove, and a notch is provided on the side wall of the connecting ring groove. An arc-shaped guide groove is provided at the notch, and the connecting block is screwed into the arc-shaped guide groove and locked in place.
[0010] In a further technical solution, the test head is a planar contact head.
[0011] In a further technical solution, the test head is a probe contact.
[0012] A further technical solution is that the test head is a roller-type contact head. In a further technical solution, the test head is a flexible probe contact head.
[0013] In a further technical solution, the end of the tester body away from the contact head is provided with a first connecting end, and also includes a test pen tip. The end of the test pen tip is provided with a second connecting end that matches the first connecting end, and the test pen tip is detachably connected to the tester body.
[0014] The beneficial effects of this utility model are: In this invention, when replacing the contact head, rotating the contact head causes the four connecting blocks on the connecting ring to rotate within the four arc-shaped guide grooves, moving the four connecting blocks to the notch. Then, the contact head is pulled outwards, thus replacing it. This replacement method is simple and convenient to use. For different application scenarios, different contact heads can be selected through differentiated designs in shape, material, and structure, achieving full coverage of scenarios such as "planar / curved surfaces, static / dynamic, small / large areas, rigid / flexible". Testers supporting contact head replacement can improve measurement accuracy and efficiency through "on-demand adaptation," while reducing the cost of multi-scenario applications.
[0015] This invention allows for adjustment of the contact head's position during electrostatic testing, tailored to different test locations. Manually rotating the adjusting wheel causes its teeth to rotate within the grooves on the moving rod, moving the rod within the mounting block. This allows for flexible adjustment of the contact head's position, adapting to complex scenarios: the contact head distance can be flexibly adjusted based on the shape and spatial position of the object being measured, ensuring precise contact with the measurement point even in narrow gaps, large curved surfaces, or high-altitude equipment. It improves operational convenience and efficiency: the manual adjustment wheel is simple to operate, requiring no tools for quick adjustment, shortening measurement preparation time, and is particularly suitable for multi-station, diverse measurement needs on production lines. It also ensures measurement accuracy and stability: precise control of the distance between the contact head and the object being measured avoids electrostatic field distortion or signal attenuation caused by improper distance, ensuring the accuracy and reliability of the measurement data.
[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0017] Figure 1 : A three-dimensional structural diagram of this utility model.
[0018] Figure 2 : A three-dimensional structural diagram of the contact adjustment structure of this utility model.
[0019] Figure 3 : A cross-sectional view of the contact adjustment structure of this utility model.
[0020] Figure 4 : A three-dimensional structural diagram of the movable rod of this utility model.
[0021] Figure 5 : A three-dimensional structural diagram of the contact head of this utility model.
[0022] Figure 6 : A three-dimensional structural schematic diagram of Embodiment 1 of this utility model.
[0023] Figure 7 : A three-dimensional structural schematic diagram of Embodiment 2 of this utility model.
[0024] Figure 8 : A three-dimensional structural schematic diagram of Embodiment 3 of this utility model.
[0025] Figure 9 : A three-dimensional structural schematic diagram of Embodiment 4 of this utility model.
[0026] Figure 10 : A diagram showing the connection structure between the tester body and the test pen tip of this utility model.
[0027] Figure 11: Disassembly diagram of the tester body and test pen tip of this utility model.
[0028] Reference numerals: 1. Tester body; 11. Mounting block; 2. Contact head; 21. Connecting part; 211. Connecting ring; 212. Connecting block; 221. Planar contact head; 222. Probe contact head; 223. Roller-type contact head; 224. Flexible probe contact head; 32. Contact adjustment structure; 31. Adjusting wheel; 32. Rotating shaft; 33. Moving rod; 34. Telescopic rod; 35. Tooth; 36. Gap; 37. Notch; 38. Arc-shaped guide groove; 39. Connecting ring groove; 41. Test pen tip; 42. First connecting end; 43. Second connecting end. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0030] Please refer to Figure 1-9 As shown; this utility model provides a technical solution for a contact-type static voltage tester: a contact-type static voltage tester includes a tester body 1 and a contact head 2. The front part of the tester body 1 is provided with a mounting block 11. The mounting block 11 is provided with a contact adjustment structure 3. The contact adjustment structure 3 is rotatably connected to the mounting block 11. The contact head 2 is detachably connected to the contact adjustment structure 3. The contact adjustment structure 3 can drive the distance position of the contact head 2 to be adjusted.
[0031] In this embodiment, refer to Figure 2 and Figure 3 As shown, the contact adjustment structure 3 includes a rotating adjustment wheel 31, a rotating shaft 32, a moving rod 33, and a telescopic rod 34. The rotating shaft 32 is horizontally arranged on the rotating adjustment wheel 31. The rotating adjustment wheel 31 is rotatably connected to the mounting block 11 through the rotating shaft 32. The rotating adjustment wheel 31 is provided with a plurality of teeth 35 arranged at equal intervals. The moving rod 33 is slidably connected to the mounting block 11. The moving rod 33 is provided with a plurality of grooves 36 that mesh with the teeth 35. The moving rod 33 is provided with a circular groove. One end of the telescopic rod 34 is fixedly connected to the inside of the circular groove and the telescopic rod 34 is electrically connected to the tester body 1.
[0032] During electrostatic discharge (ESD) testing, the position and distance of the contact head 2 can be adjusted according to the different test locations. This is achieved by manually rotating the adjusting wheel 31, causing the teeth 35 on the adjusting wheel 31 to rotate within the grooves 36 on the moving rod 33. This allows the moving rod 33 to move within the mounting block 11, enabling the contact head 2 to be adjusted as needed. This allows for flexible adaptation to complex scenarios: the distance of the contact head 2 can be flexibly adjusted according to the shape and spatial position of the object being measured, ensuring accurate contact with the measurement point even in narrow gaps, large curved surfaces, or high-altitude equipment. Improved operational convenience and efficiency: Manually rotating the adjusting wheel 31 is simple and requires no tools for quick adjustment, shortening measurement preparation time. This is especially suitable for multi-station and diverse measurement needs on production lines. Guaranteed measurement accuracy and stability: Precise control of the distance between the contact head 2 and the object being measured avoids electrostatic field distortion or signal attenuation caused by improper distance, ensuring the accuracy and reliability of the measurement data.
[0033] In this embodiment, the telescopic rod 34 is a three-stage telescopic moving rod. When the contact head 2 moves, the telescopic rod 34 can move in three stages, moving the contact head 2 to the position required for testing, and performing electrostatic testing.
[0034] In this embodiment, the contact head 2 includes a connecting part 21 and a test head. The connecting part 21 is detachably connected to the moving rod 33, and the test head is located on the connecting part 21.
[0035] In this embodiment, refer to Figure 4 and Figure 5 As shown, the connecting part 21 includes a connecting ring 211, and four connecting blocks 212 are provided on the connecting ring 211 at equal intervals. The end of the moving rod 33 is provided with a connecting ring groove 39. The side wall of the connecting ring groove 39 is provided with a notch 37, and an arc-shaped guide groove 38 is provided at the notch 37. The connecting block 212 is screwed into the arc-shaped guide groove 38 and locked in place.
[0036] When replacing contact head 2, rotating contact head 2 causes the four connecting blocks 212 on the connecting ring 211 to rotate within the four arc-shaped guide grooves 38, moving the four connecting blocks 212 to the notch 37. Then, contact head 2 is pulled outwards, thus replacing it. This replacement method is simple and convenient. For different application scenarios, different contact heads 2 can be selected, with differentiated designs in shape, material, and structure, achieving full coverage of scenarios such as "planar / curved surfaces, static / dynamic, small / large areas, rigid / flexible". Testers that support contact head 2 replacement can improve measurement accuracy and efficiency through "on-demand adaptation," while reducing the cost of multi-scenario applications.
[0037] Reference Figure 6As shown in Embodiment 1: In this embodiment, the test head is a planar contact head 221.
[0038] Structural features: Circular or rectangular metal / conductive rubber surfaces (5-50mm in diameter), with smooth or textured surfaces (to increase friction).
[0039] Applicable scenarios: Flat surfaces (such as metal plates, glass, PCB pads) provide a large contact area and stable measurement values. Scenarios where uniform collection of static electricity over a large area is required (such as the surface of a thin film roll).
[0040] Typical Case: When measuring the glass substrate of an LCD screen, use a gold-plated flat head with a diameter of 20mm to ensure complete contact with the surface.
[0041] Reference Figure 7 As shown in Embodiment 2: In this embodiment, the test head is a probe contact 222. Structural features: Metal needles (tungsten steel or gold-plated) with a tip diameter of 0.05-1mm, some with an insulating sleeve (only the needle tip is exposed).
[0042] Applicable scenarios: Measurement of minute areas (such as IC chip pins and solder joints of precision electronic components); Penetration measurements (such as electrostatic testing of the inner layers of multilayer circuit boards, which requires piercing the surface coating).
[0043] Key points of operation: Pressure must be controlled during contact (≤0.1N) to avoid deformation of the needle tip or damage to the component being measured (a micro-adjustment bracket can be used).
[0044] Reference Figure 8 As shown in Embodiment 3: In this embodiment, the test head is a roller-type contact head 223. Structural features: Metal or conductive rubber rollers (10-30mm in diameter) can rotate around an axis, and internal wires are connected by slip rings.
[0045] Applicable scenarios: Electrostatic monitoring during high-speed transport of films, paper, and plastic sheets in dynamic production lines; For curved objects (such as cylindrical containers or rollers), the rollers maintain contact with the surface as they roll.
[0046] Advantages: It reduces the interference of triboelectricity on measurements (rolling contact has less electrostatic interference than sliding contact), making it suitable for continuous online detection.
[0047] Reference Figure 9As shown in Embodiment 4: In this embodiment, the test head is a flexible probe contact head 224. Structural features: Conductive rubber strips / carbon fiber bundles are combined with a flexible substrate and can be bent into any shape (such as L-shape or U-shape).
[0048] Applicable scenarios: Complex curved surfaces (such as grooves / corners in automotive interior parts and aerospace components); Narrow spaces (such as gaps inside equipment or the inner walls of pipes) allow for the reaching into hard-to-access areas.
[0049] In another embodiment of this utility model, referring to Figure 10 and Figure 11 The tester body 1 has a first connection end 42 at the end away from the contact head 2, and also includes a test pen 41. The end of the test pen 41 has a second connection end 43 that matches the first connection end 42. The test pen 41 is detachably connected to the tester body 1. In the above embodiment, the contact head 2 is installed in the mounting block 11 and cannot be replaced as a whole. However, there are many testing scenarios and different problems may be encountered. At this time, different test ends need to be used. For example, the testing position is relatively narrow. At this time, the test pen 41 can be inserted into it to contact the object. However, such scenarios are relatively rare. Also, the test pen 41 is relatively thin and long, which is not convenient to use. Therefore, the test pen 41 can be selected as an accessory and communicates through the first connection end 42 and the second connection end 43. It can be disassembled when not in use.
[0050] Preferably, a second control panel is provided on the back of the tester body 1, which displays information from the test pen tip 41 as a separate part.
[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A contact-type static voltage tester, characterized in that: The tester includes a tester body (1) and a contact head (2). The front of the tester body (1) is provided with a mounting block (11). The mounting block (11) is provided with a contact adjustment structure (3). The contact adjustment structure (3) is rotatably connected to the mounting block (11). The contact head (2) is detachably connected to the contact adjustment structure (3). The contact adjustment structure (3) can adjust the distance position of the contact head (2).
2. The contact-type static voltage tester according to claim 1, characterized in that: The contact adjustment structure (3) includes a rotating adjustment wheel (31), a rotating shaft (32), a moving rod (33), and a telescopic rod (34). The rotating shaft (32) is horizontally arranged on the rotating adjustment wheel (31). The rotating adjustment wheel (31) is rotatably connected to the mounting block (11) through the rotating shaft (32). The rotating adjustment wheel (31) is provided with a number of teeth (35) arranged at equal intervals. The moving rod (33) is slidably connected to the mounting block (11). The moving rod (33) is provided with a number of tooth grooves (36) that mesh with the teeth (35). The moving rod (33) is provided with a circular groove. One end of the telescopic rod (34) is fixedly connected to the inside of the circular groove and the telescopic rod (34) is electrically connected to the tester body (1).
3. The contact-type static voltage tester according to claim 2, characterized in that: The telescopic rod (34) is a three-stage telescopic moving rod.
4. A contact-type static voltage tester according to claim 2, characterized in that: The contact head (2) includes a connecting part (21) and a test head. The connecting part (21) is detachably connected to the moving rod (33), and the test head is located on the connecting part (21).
5. A contact-type static voltage tester according to claim 4, characterized in that: The connecting part (21) includes a connecting ring (211), on which four connecting blocks (212) are provided at equal intervals. The end of the moving rod (33) is provided with a connecting ring groove (39). The side wall of the connecting ring groove (39) is provided with a notch (37). An arc-shaped guide groove (38) is provided at the notch (37). The connecting block (212) is screwed into the arc-shaped guide groove (38) and locked in place.
6. A contact-type static voltage tester according to claim 4, characterized in that: The test head is a planar contact head (221).
7. A contact-type static voltage tester according to claim 4, characterized in that: The test head is a probe contact (222).
8. A contact-type static voltage tester according to claim 4, characterized in that: The test head is a roller-type contact head (223).
9. A contact-type static voltage tester according to claim 4, characterized in that: The test head is a flexible probe contact head (224).
10. A contact-type static voltage tester according to claim 1, characterized in that: The tester body (1) has a first connection end (42) at the end away from the contact head (2), and also includes a test pen tip (41). The end of the test pen tip (41) is provided with a second connection end (43) that matches the first connection end (42). The test pen tip (41) is detachably connected to the tester body (1).