Capacitance and inductance tester
Patent Information
- Application Number
- CN202521238230.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-17
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-06-17
AI Technical Summary
[0003]电容电感测试仪的显示屏显示检测参数，显示屏大都依赖背光显示数据，但是环境光（如强烈阳光）较大时，会覆盖屏幕亮度，导致对比度下降，内容难以辨识，影响设备的使用效果，为此我们提出电容电感测试仪来解决现有的问题
本实用新型电容电感检测用测试仪箱体使用时，通过转动开启测试仪顶盖，电流钳（卡在测试回路当中）和电夹钳（接电容器或电控器电连接）通过接线插头与箱体内部的对应的插孔插接，检测时通过显示屏了解检测数据的参数情况，在光线影响显示屏的观看时，侧幕布与顶幕布展开，使得显示屏遮蔽在半敞开式的空间中，抵消大部分外界的光线，使得显示屏在昏暗的环境中显示的更加清楚，提升电容电感测试仪使用的效果。
Smart Images
Figure CN224888760U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing instrument technology, and in particular to a capacitance and inductance tester. Background Technology
[0002] A capacitance and inductance tester is an electronic instrument used to accurately measure the parameters of capacitors and inductors. It is widely used in circuit design, component testing, and equipment maintenance. Its core function is to quickly determine the capacitance and inductance values by applying an AC test signal and analyzing the impedance characteristics of the components. It can also display key parameters such as equivalent series resistance and quality factor.
[0003] The display screen of a capacitance and inductance tester shows the test parameters. Most of the screens rely on backlight to display the data. However, when the ambient light (such as strong sunlight) is high, it will cover the screen brightness, resulting in a decrease in contrast and making the content difficult to read, which will affect the use of the equipment. Therefore, we propose a capacitance and inductance tester to solve the existing problems. Summary of the Invention
[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a capacitance and inductance tester.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a capacitance and inductance tester, comprising a tester housing, a tester top cover, side walls, a slider, a shaft, and a retaining sleeve. The tester top cover is rotatably mounted on the upper end of the tester housing. A display screen is provided inside the tester housing. A rotating shaft is rotatably mounted inside the tester top cover. Side arms are sleeved on the outer walls of the rotating shaft. A side curtain is provided at the lower end of the side wall, with its rear end connected to the inner wall of the tester top cover. A side groove is provided at one opposite end of the side wall. A slider is slidably mounted inside the side groove. A top curtain is provided at the lower end of the slider, with one end connected to the inner wall of the tester top cover.
[0006] Preferably, the upper sides of the tester housing are provided with bottom grooves, which support one end of the clamping arm. The bottom grooves support the unfolded clamping arm, thereby fixing the rotatably mounted tester top cover above the tester housing.
[0007] Preferably, both ends of the tester housing have sliding sleeves embedded in the bottom grooves. A slidable shaft is installed inside each sliding sleeve. A positioning hole is provided on one side of the lower end of the side arm. A slidable shaft, with one end inserted into the positioning hole, is installed inside the sliding sleeve. The slidable shaft is inserted into the positioning hole located inside the bottom groove, locking the side arm and applying a lateral limiting force to it.
[0008] Preferably, a positioning block is provided at one end of the insertion shaft, and a pull handle is provided at one end of the positioning block. A compression spring is provided between the positioning block and the inner wall of the tester housing, which is sleeved on the outside of the insertion shaft. The clamping shaft is elastically supported by the compression spring, thereby improving the stability of the clamping shaft, and gripping the pull handle makes it easier to apply a pulling force to the clamping shaft.
[0009] Preferably, anti-slip pads are provided at the four corners of the lower end of the tester housing, a handle is provided at the top of the tester cover, a locking pin is provided on the outer wall of the tester cover, and a locking pin is provided on the outer wall of the tester housing. The four corners of the lower end of the tester housing are treated with anti-slip material, which also prevents the support platform from directly abrading the lower end of the tester housing. The handle makes it easy to lift and use the closed tester cover and tester housing.
[0010] Preferably, a retaining sleeve is fitted onto the outer side of the second retaining shaft, a retaining block is provided at one end of the first retaining shaft, and a retaining block is provided at one end of the second retaining shaft. The retaining sleeve has an internal groove that fits onto the outer side of the retaining block and is rotatably fitted with the retaining block. A semi-circular spring sheet is provided between the inner wall of the retaining sleeve and the outer wall of the retaining shaft. When compressed, the retaining sleeve fits onto the outer side of the retaining block, supported by the elastic force of the spring sheet. This allows the retaining sleeve to fit onto the outer sides of both retaining blocks, thus fixing the top cover of the tester and the tester housing together.
[0011] Preferably, a limiting block is sleeved on the outer wall of the rotating shaft, and symmetrically distributed bearing brackets that are rotatably mounted with the rotating shaft are provided on the upper inner wall of the tester housing. A torsion spring sleeved on the outside of the rotating shaft is provided between the bearing brackets and the limiting block. The rotating shaft is subjected to torsional elastic force by the torsion spring, so that when the side arm is disengaged from the bottom groove, it is automatically rotated into the top cover of the tester by the torsional elastic force of the torsion spring, which facilitates the storage of the side curtain and the fixed curtain.
[0012] Preferably, magnetic blocks are provided on the inner walls of both the upper and lower ends of the side groove, and the slider is a magnetic structure. The slider is magnetically attracted and positioned inside both the upper and lower ends of the side groove, which helps to position the top screen.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When using the capacitor and inductance testing instrument housing of this utility model, the top cover of the testing instrument is opened by rotating it. The current clamp (which is locked in the test circuit) and the electric clamp (which is connected to the capacitor or the controller) are plugged into the corresponding sockets inside the housing through the wiring plugs. During testing, the parameters of the test data can be viewed on the display screen. When the light affects the viewing of the display screen, the side screen and the top screen are unfolded, so that the display screen is shielded in a semi-open space, canceling most of the external light, making the display screen clearer in a dim environment, and improving the effect of the capacitor and inductance testing instrument. Attached Figure Description
[0014] Figure 1 This is a front-view three-dimensional structural diagram of the present invention; Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention; Figure 3 This is a side view three-dimensional structural diagram of the side curtain of this utility model; Figure 4 This is a top-view perspective view of the three-dimensional structure of the pin of this utility model; Figure 5 This is a top-view three-dimensional structural diagram of the spring sheet in the compressed state of this utility model.
[0015] Reference numerals in the attached diagram: 1. Tester housing; 2. Tester top cover; 3. Side arm; 4. Side curtain; 5. Top curtain; 6. Locking shaft one; 7. Locking block one; 8. Handle; 9. Anti-slip pad; 10. Rotating shaft; 11. Limiting block; 12. Torsion spring; 13. Slider; 14. Side groove; 15. Positioning hole; 16. Magnetic block; 17. Bearing bracket; 18. Bottom groove; 19. Positioning block; 20. Pull handle; 21. Compression spring; 22. Sliding sleeve; 23. Insert shaft; 24. Sleeve; 25. Spring plate; 26. Locking shaft two; 27. Locking block two; 28. Slot. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] like Figures 1-5 As shown, the capacitance and inductance tester proposed in this utility model includes a tester housing 1, a tester top cover 2, a side wall, a slider 13, a plug shaft 23, and a ferrule 24. The tester top cover 2 is rotatably mounted on the upper end of the tester housing 1. A display screen is provided inside the tester housing 1. A rotating shaft 10 is rotatably mounted inside the tester top cover 2. Side arms 3 are sleeved on the outer wall of the rotating shaft 10. A side curtain 4 is provided at the lower end of the side wall, and its rear end is connected to the inner wall of the tester top cover 2. A side groove 14 is opened at one end of the side wall. A slider 13 is slidably mounted inside the side groove 14. A top curtain 5 is provided at the lower end of the slider 13, and one end of the top curtain 5 is connected to the inner wall of the tester top cover 2. The tester housing 1 has bottom grooves 18 on both sides of the upper end, and the bottom grooves 18 support one end of the clamping arm; Both ends of the tester housing 1 are fitted with sliding sleeves 22 that penetrate the bottom groove 18. A plug shaft 23 is slidably installed inside the sliding sleeve 22. A positioning hole 15 is opened on one side of the lower end of the side arm 3. A plug shaft 23 with one end inserted into the positioning hole 15 is slidably installed inside the sliding sleeve 22. A positioning block 19 is provided at one end of the insertion shaft 23, and a pull handle 20 is provided at one end of the positioning block 19. A compression spring 21 is provided between the positioning block 19 and the inner wall of the tester housing 1 and sleeved on the outside of the insertion shaft 23. Anti-slip pads 9 are provided at the four corners of the lower end of the tester housing 1, a handle 8 is provided at the upper end of the tester top cover 2, a locking shaft 6 is provided on the outer wall of the tester top cover 2, and a locking shaft 26 is provided on the outer wall of the tester housing 1. A sleeve 24 is fitted on the outside of the second 26. A first 7 is provided at one end of the first 6 and a second 27 is provided at one end of the second 26. A groove 28 is provided inside the sleeve 24, which is fitted on the outside of the second 27 and rotates with the first 7. A semi-circular spring piece 25 is provided between the inner wall of the sleeve 24 and the outer wall of the 26. A limiting block 11 is sleeved on the outer wall of the rotating shaft 10. The upper inner wall of the tester housing 1 is provided with symmetrically distributed bearing brackets 17 that are rotatably installed with the rotating shaft 10. A torsion spring 12 sleeved on the outside of the rotating shaft 10 is provided between the bearing brackets 17 and the limiting block 11. The inner walls of the upper and lower ends of the side groove 14 are provided with magnetic blocks 16, and the slider 13 is a magnetic structure. Based on the implementation steps of Embodiment 1: Hold the handle 8 at the top of the tester top cover 2 and place the closed tester housing 1 flat on the operating table. Press the clasp 24 to disengage it from the first clasp 7 and the second clasp 27, thereby releasing the lock between the tester top cover 2 and the tester housing 1. Flip the tester top cover 2 upward to a vertical position and pull the side arm 3 to rotate the shaft 10. One end of the side arm 3 is located inside the bottom groove 18. At this time, the bottom groove 18 provides support for the lower end of the side arm 3. At the same time, pull the handle 20 outward to drive the insertion shaft 23. After the insertion shaft 23 corresponds to the positioning hole 15, it is inserted into the insertion hole through the elastic support force of the compression spring 21, positioning the side arm 3 and causing the side wall to unfold to both sides of the tester top cover 2. Then, the slider 13 is pressed down, disengaging from the magnetic block 16 inside the upper end of the side groove 14 and magnetically adhering to the magnetic block 16 on the lower end of the side groove 14. The fixed curtain unfolds by the downward movement of the slider 13. Connect the current clamp to the circuit under test, connect the clamp to both ends of the capacitor or inductor, insert the wiring plug into the corresponding socket of the tester housing 1, turn on the power of the equipment, set the test parameters through the control panel of the tester housing 1, and the display screen displays data such as capacitance value, inductance value, equivalent series resistance and quality factor in real time. By unfolding the combination of the side curtain 4 and the top curtain 5, a semi-enclosed dark chamber is constructed above the display screen. The top curtain 5 covers most of the space above the display screen and together with the two side curtains 4, forms a semi-enclosed light-blocking structure. The diffuse reflection characteristics of the curtains are used to eliminate ambient light interference. The side curtains 4 are made of dark light-blocking fabric, which can absorb most of the light. Observe the display screen through the space between the slider 13 and the tester housing 1.
[0018] After the test is completed, push the slider 13 to the upper end of the side groove 14 and attach it to the magnetic block 16 on the inner wall of the upper end of the side groove 14 to release the unfolded state of the top screen 5. Pull out the pin from the positioning hole 15 and manually rotate the side arm 3 to disengage it from the bottom groove 18. The rotating shaft 10 automatically rotates under the torsional elastic force of the torsion spring 12. The sleeve 24 is elastically engaged with the first slot 7 and the second slot 27 by the spring plate 25 to realize the overall storage of the equipment. The side screen 4 and the top screen 5 are unfolded by combination. The rotating shaft 10 has a built-in torsion spring 12 to realize the automatic storage of the side arm 3. The spring plate 25 of the sleeve 24 supports quick opening and closing with one hand. The compression value of the spring plate 25 is 45°. The handle 8 adopts an ergonomic arc design for easy carrying for a long time. After the screen is unfolded, the contrast of the display screen area is improved to ensure that the data is clear and readable in strong light environment. Traditional test instrument displays suffer from blurred data due to reflection in outdoor or strong light environments. This design addresses the core pain point of reduced contrast by using a physical light-shielding structure to control the illuminance of the display area within the visible threshold. While retaining the core functions of the capacitance and inductance tester, it specifically solves the display problem in strong light environments, significantly improving the equipment's environmental adaptability and operational efficiency.
[0019] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
[0020] 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.
Claims
1. A capacitance and inductance tester, comprising a tester housing (1), a tester top cover (2), side walls, a slider (13), a insertion shaft (23), and a retaining sleeve (24), characterized in that: The tester housing (1) is rotatably mounted with a tester top cover (2) on its upper end. The tester housing (1) is equipped with a display screen inside. The tester top cover (2) is rotatably mounted with a rotating shaft (10). The outer wall of the rotating shaft (10) is fitted with a side arm (3). The lower end of the side wall is provided with a side curtain (4) whose rear end is connected to the inner wall of the tester top cover (2). The opposite end of the side wall is provided with a side groove (14). The side groove (14) is slidably mounted with a slider (13) inside. The lower end of the slider (13) is provided with a top curtain (5) whose end is connected to the inner wall of the tester top cover (2).
2. The capacitance and inductance tester according to claim 1, characterized in that: The tester housing (1) has bottom grooves (18) on both sides of the upper end, and the bottom grooves (18) support one end of the clamping arm.
3. The capacitance and inductance tester according to claim 2, characterized in that: The tester housing (1) has a sliding sleeve (22) with a through bottom groove (18) embedded in both ends. A plug shaft (23) is slidably installed inside the sliding sleeve (22). A positioning hole (15) is opened on one side of the lower end of the side arm (3). A plug shaft (23) with one end inserted into the positioning hole (15) is slidably installed inside the sliding sleeve (22).
4. The capacitance and inductance tester according to claim 3, characterized in that: A positioning block (19) is provided at one end of the insertion shaft (23), and a pull handle (20) is provided at one end of the positioning block (19). A compression spring (21) sleeved on the outside of the insertion shaft (23) is provided between the positioning block (19) and the inner wall of the tester housing (1).
5. The capacitance and inductance tester according to claim 1, characterized in that: Anti-slip pads (9) are provided at the four corners of the lower end of the tester housing (1), a handle (8) is provided at the upper end of the tester top cover (2), a locking shaft one (6) is provided on the outer wall of the tester top cover (2), and a locking shaft two (26) is provided on the outer wall of the tester housing (1).
6. The capacitance and inductance tester according to claim 5, characterized in that: A sleeve (24) is fitted on the outside of the second clamping shaft (26). A first clamping block (7) is provided at one end of the first clamping shaft (6). A second clamping block (27) is provided at one end of the second clamping shaft (26). A groove (28) is provided inside the sleeve (24) that fits on the outside of the second clamping block (27) and is rotatably fitted with the first clamping block (7). A semi-circular spring sheet (25) is provided between the inner wall of the sleeve (24) and the outer wall of the clamping shaft.
7. The capacitance and inductance tester according to claim 1, characterized in that: The outer wall of the rotating shaft (10) is fitted with a limiting block (11), and the upper inner wall of the tester housing (1) is provided with symmetrically distributed bearing brackets (17) that are rotatably installed with the rotating shaft (10). A torsion spring (12) fitted on the outside of the rotating shaft (10) is provided between the bearing bracket (17) and the limiting block (11).
8. The capacitance and inductance tester according to claim 1, characterized in that: The inner walls of the upper and lower ends of the side groove (14) are provided with magnetic blocks (16), and the slider (13) is a magnetic structure.