Probe grounding device and oscilloscope
By designing a flexible adjustment grounding device on the oscilloscope probe, the problems of signal interference and interface damage in the prior art are solved, and the flexible position adjustment of the grounding pin is realized, which improves measurement accuracy and efficiency.
Patent Information
- Application Number
- CN202420605239.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The grounding method of existing oscilloscope probes has problems of signal interference and interface damage, especially when the measurement point is far away from the interface, the interference is more serious, affecting the measurement accuracy.
Design a probe grounding device, including a rotating member and a grounding pin. Through the adjustment groove, limit module, spring plunger and adjustment screw, the grounding pin can be adjusted flexibly, and the position can be adjusted in horizontal and vertical directions. Meet different measurement needs.
It improves the convenience of position adjustment of the grounding pin, can quickly move to the closest test point, ensures measurement accuracy and efficiency, avoids the problems of interface damage and too far distance, and significantly improves the accuracy and efficiency of the test.
Smart Images
Figure CN222338503U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oscilloscopes, in particular to a probe grounding device and an oscilloscope. Background Art
[0002] When using an oscilloscope to measure signals, it must be grounded to eliminate interference and present a clear and complete waveform. There are two existing ways to ground oscilloscope probes, but both have disadvantages: the first grounding method is to use the ground wire that comes with the oscilloscope when you buy it. The ground wire in this method has a certain length, and the signal will be interfered to a certain extent, affecting the accuracy of the signal measurement results, especially at the level of design quality verification, where there are strict requirements for signal accuracy; the second grounding method is to use a single-core wire. Although it can solve the interference caused by the ground wire being too long, the single-core wire needs to be clamped on the interface of the board. Not every model has an interface, and it is easy to cause interface damage when clamping. The distance between the measurement point and the interface is very far, and if the distance between the measurement point and the interface is very far, the ground wire needs to be extended, causing the signal to be increasingly interfered with during measurement.
[0003] Therefore, it is necessary to develop a new type of probe grounding device for oscilloscopes. Utility Model Content
[0004] The utility model aims to provide a probe grounding device and an oscilloscope to solve the deficiencies existing in the background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A probe grounding device is connected to the probe of an oscilloscope, comprising: a rotating member having an annular sleeve, the annular sleeve is sleeved on the probe to electrically connect the rotating member to the probe, the rotating member is also provided with an adjustment groove, the adjustment groove is spaced apart from the annular sleeve, a plurality of limiting gears are provided in the adjustment groove along the radial direction of the adjustment groove; and a grounding pin, movably mounted on the adjustment groove in the horizontal direction through the plurality of limiting gears.
[0007] Preferably, a plurality of groups of limit modules are provided in the adjustment groove, and the plurality of limit modules are arranged at intervals in the adjustment groove, and the limit module includes two symmetrically arranged positioning columns, and an installation gap is formed between two adjacent positioning columns, and the two relatively arranged installation gaps and the area in the adjustment groove cooperate to form the limit gear.
[0008] Preferably, the positioning column is a spring plunger, and the spring plunger has a movably arranged ball head, the ball head is hemispherical, and the ball head is arranged on the inner side of the adjustment groove.
[0009] Preferably, the grounding pin is movably mounted on the adjusting groove via a connecting ring, and the connecting ring is matched with the limiting gear position.
[0010] Preferably, an adjusting sleeve is provided between the connecting ring and the grounding pin, the adjusting sleeve is embedded in the connecting ring, and the grounding pin is movably provided on the adjusting sleeve in a vertical direction by providing a movable member.
[0011] Preferably, the movable part is an adjusting screw, the adjusting sleeve is provided with an adjusting opening for installing the adjusting screw, the adjusting screw is movably installed in the adjusting sleeve along the adjusting opening and is arranged to abut against the outer wall of the grounding pin.
[0012] Preferably, the adjusting screw is a machine screw.
[0013] In order to further achieve the above purpose, the utility model also provides the following technical solutions:
[0014] An oscilloscope comprises a host and a probe connected to the host, wherein the probe is connected to the probe grounding device as described above.
[0015] Preferably, the probe is further provided with a supporting bracket, and the supporting bracket is provided with two supporting feet.
[0016] Compared with the prior art, the beneficial effects of the utility model are: the position adjustment of the grounding pin is very convenient, which can meet the installation requirements of different positions on the circuit board, and the grounding pin can be easily and quickly moved to the GND end closest to the test point to ensure accurate waveform measurement. Finally, by installing the probe grounding device on the oscilloscope probe, it is no longer restricted by whether there is an interface on the circuit board, whether the component is damaged, and whether the location is too far from the measurement point. It can be easily moved to each test point on the circuit board that needs to be measured for analysis and measurement, which greatly improves the accuracy and efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is the installation diagram between the probe grounding device and the probe of the oscilloscope;
[0018] Figure 2 It is a schematic diagram of the installation between the probe, support bracket and probe grounding device in the oscilloscope. DETAILED DESCRIPTION
[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0023] See also Figure 1 The utility model provides a probe grounding device 100, which is connected to a probe 200 of an oscilloscope. The probe grounding device 100 includes a rotating member 1 and a grounding pin 2. The rotating member 1 is provided with an annular sleeve 101 sleeved on the probe 200, and the annular sleeve 101 is electrically connected to the probe 200 so that the entire rotating member 1 is electrically connected to the probe 200. Then, the grounding pin 2 is also movably connected to the rotating member 1. The grounding pin 2 can move freely on the rotating member 1. In addition, the rotating member 1 can be rotated on the probe 200 through the annular sleeve 101, so that the position adjustment of the grounding pin 2 is very convenient, which can meet the installation requirements of different positions on the circuit board. The grounding pin 2 can be easily and quickly moved to the GND end (grounding end) closest to the test point to ensure the measurement of accurate waveforms. Finally, by installing the probe grounding device 100 on the oscilloscope probe 200, it is no longer restricted by whether there is an interface on the circuit board, whether the components are damaged, and whether the location is too far from the measurement point. It can be easily moved to each test point on the circuit board that needs to be measured for analysis and measurement, which greatly improves the accuracy and efficiency of the test.
[0024] Next, in this embodiment, refer to Figure 1 and Figure 2, the rotating member 1 is provided with an adjustment groove 102, the adjustment groove 102 is spaced apart from the annular sleeve 101, a plurality of limit gear 10 positioning posts 3 are provided in the adjustment groove 102 along the radial direction of the adjustment groove 102, the grounding pin 2 is movably mounted on the adjustment groove 102 in the horizontal direction through the plurality of limit gear 10 positioning posts 3, that is, the grounding pin 2 can adjust its position in the horizontal direction through the plurality of limit gear 10 positioning posts 3, so as to meet different usage needs. Secondly, the grounding pin 2 is arranged to abut against the inner wall of the rotating member 1 in the adjustment groove 102, so as to ensure that the grounding pin 2 and the probe 200 of the oscilloscope can be connected through the rotating member 1, and the grounding function is realized after the probe 200 is connected to the grounding pin 2 on the rotating member 1.
[0025] Next, in this embodiment, refer to Figure 1 and Figure 2 , a plurality of limit modules are provided in the adjustment groove 102, and a plurality of the limit modules are arranged at intervals in the adjustment groove 102, the limit module includes two symmetrically arranged positioning columns 3, and an installation gap 104 is formed between two adjacent positioning columns 3, and the two relatively arranged installation gaps 104 and the area in the adjustment groove 102 cooperate to form the limit gear 10 positioning column 3. Assuming that four groups of limit modules are provided in the adjustment groove 102, there are three corresponding installation gaps 104 formed by the positioning columns and positioning columns 3. Two relative installation gaps 104 will form a limit gear 10 positioning column 3 in the adjustment groove 102, so three limit gears 10 positioning columns 3 will be formed at this time, and each limit gear 10 positioning column 3 is temporarily clamped and installed with the grounding pin 2 through the positioning column and positioning column 3. The grounding pin 2 can be moved to the corresponding limit gear 10 positioning column 3 according to actual needs. For example, assuming that the grounding point is closer to the oscilloscope probe 200 at this time, the grounding pin 2 can be moved to the limit gear 10 positioning column 3 in the adjustment groove 102 that is closest to the annular sleeve 101; if the grounding point is far away from the oscilloscope probe 200 at this time, the grounding pin 2 can be moved to the limit gear 10 positioning column 3 in the adjustment groove 102 that is farthest from the annular sleeve 101.
[0026] Next, in this embodiment, refer to Figure 1 and Figure 2, the positioning column 3 is a spring plunger, and the spring plunger has a movably arranged ball head 301, the ball head 301 is hemispherical, and the ball head 301 is arranged inside the adjustment groove 102. When the grounding pin 2 is set on the positioning column 3 of the limit gear 10, the grounding pin 2 will be temporarily limited on the positioning column 3 of the limit gear 10 under the clamping of the ball heads 301 on both sides, so as to realize the installation of the grounding pin 2 on the positioning column 3 of the limit gear 10. In addition, since the ball head 301 is movably arranged, when the position of the grounding pin 2 needs to be adjusted, it only needs to be moved along the radial direction of the adjustment groove 102, that is, the grounding pin 2 is pushed in the horizontal direction to realize the position adjustment of the grounding pin 2 between multiple positioning columns 3 of the limit gear 10. In addition, the spring plunger is also called a ball head plunger, or a positioning bead / column, which is a component in which a spring is installed inside the screw thread to adjust the preload force and realize the positioning function by controlling the screw-in depth.
[0027] Next, in this embodiment, refer to Figure 1 and Figure 2 , the grounding pin 2 is movably mounted on the adjustment slot 102 through a connecting ring 201, and the connecting ring 201 is matched with the positioning column 3 of the limit gear 10. When the user moves the grounding pin 2, the connecting ring 201 will move synchronously on the adjustment slot 102. Since the connecting ring 201 itself and the positioning column 3 of the limit gear 10 are matched, the width between them is consistent to meet the installation conditions, that is, after the connecting ring 201 is set on the positioning column 3 of the limit gear 10, the connecting ring 201 will be set against the inner wall of the adjustment slot 102 and the positioning column 3.
[0028] Next, in this embodiment, refer to Figure 1 and Figure 2 , an adjusting sleeve 202 is provided between the connecting ring 201 and the grounding pin 2, the adjusting sleeve 202 is embedded in the connecting ring 201, and the grounding pin 2 is movably provided on the adjusting sleeve 202 in the vertical direction by providing a movable member 203. First, when the connecting ring 201 moves, it will synchronously drive the adjusting sleeve 202 on which the grounding pin 2 is installed to move, and a movable member 203 for adjusting the position of the grounding pin 2 in the vertical direction is provided in the adjusting sleeve 202, under the action of the movable member 203, the position of the grounding pin 2 in the vertical direction can be adjusted, and the adjusting slot 102 can adjust the position of the grounding pin 2 in the horizontal direction. In this embodiment, the position of the grounding pin 2 in the vertical and horizontal directions can be adjusted, further improving the adjustment range of the grounding pin 2 in the grounding device, so that the scenes to which it can be applied are more extensive and diverse, and can meet most of the detection needs, and it is simple, convenient and practical to use, and at the same time, it well solves the shortcomings existing in the background technology, and the user experience is excellent.
[0029] Next, in this embodiment, refer to Figure 1 and Figure 2 , the movable part 203 is an adjusting screw, and the adjusting sleeve 202 is provided with an adjusting opening for installing the adjusting screw. The adjusting screw is movably installed in the adjusting sleeve 202 along the adjusting opening and is arranged against the outer wall of the grounding pin 2. The adjusting screw can be extended into the adjusting sleeve 202 along the adjusting opening and is arranged against the grounding pin 2. When it is necessary to adjust the position of the grounding pin 2 in the vertical direction, the adjusting screw is first loosened, and then the position of the grounding pin 2 is adjusted according to actual needs. After the position of the grounding pin 2 is adjusted, the adjusting screw is tightened to fix the position of the grounding pin 2, that is, the position of the grounding pin 2 is adjusted once. Among them, as a preferred embodiment, the adjusting screw is a machine screw. The machine screw is also known as a set screw or a stop screw, and its function is to fix.
[0030] Also, see Figure 1 The utility model also provides an oscilloscope, which includes a host and a probe 200 connected to the host, and the probe 200 is connected to the probe grounding device 100 in any of the above-mentioned embodiments. By setting the probe grounding device 100, the oscilloscope is very convenient to adjust the position of the grounding pin 2, which can meet the installation requirements of different positions on the circuit board, and can easily and quickly move the grounding pin 2 to the GND end closest to the test point to ensure accurate waveform measurement. Finally, by installing the probe grounding device 100 on the oscilloscope probe 200, it is no longer restricted by whether there is an interface on the circuit board, whether the component is damaged, and whether the location is too far from the measurement point. It can be easily moved to each test point on the circuit board that needs to be measured for analysis and measurement, which greatly improves the accuracy and efficiency of the test.
[0031] Moreover, in this embodiment, a supporting bracket is further provided on the probe 200, and two supporting feet 311 are provided on the supporting bracket. The two supporting feet 311 cooperate with the probe 200 and the grounding pin 2 to form a four-corner positioning structure, which can improve the stability of the grounding pin 2 and the probe 200 during operation and improve the detection accuracy.
[0032] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.
Claims
1. A probe grounding device, connected to a probe of an oscilloscope, characterized in that: include: The rotating member has an annular sleeve, the annular sleeve is sleeved on the probe to electrically connect the rotating member to the probe, the rotating member is also provided with an adjustment groove, the adjustment groove is spaced apart from the annular sleeve, and a plurality of limiting gears are provided in the adjustment groove along the radial direction of the adjustment groove; and The grounding pin is movably mounted on the adjusting slot in the horizontal direction through a plurality of limiting positions.
2. The probe grounding device according to claim 1, characterized in that: A plurality of groups of limit modules are arranged in the adjustment groove, and the plurality of limit modules are arranged at intervals in the adjustment groove. The limit module includes two symmetrically arranged positioning columns, and an installation gap is formed between two adjacent positioning columns. The two relatively arranged installation gaps and the area in the adjustment groove cooperate to form the limit gear.
3. The probe grounding device according to claim 2, characterized in that: The positioning column is a spring plunger, and the spring plunger is provided with a movably arranged ball head, the ball head is hemispherical, and the ball head is arranged on the inner side of the adjustment groove.
4. The probe grounding device according to claim 1, characterized in that: The grounding pin is movably mounted on the adjusting groove through a connecting ring, and the connecting ring is matched with the limiting gear position.
5. The probe grounding device according to claim 4, characterized in that: An adjusting sleeve is arranged between the connecting ring and the grounding pin. The adjusting sleeve is embedded in the connecting ring. The grounding pin is movably arranged on the adjusting sleeve in a vertical direction by arranging a movable part.
6. The probe grounding device according to claim 5, characterized in that: The movable part is an adjusting screw. The adjusting sleeve is provided with an adjusting opening for installing the adjusting screw. The adjusting screw is movably installed in the adjusting sleeve along the adjusting opening and is arranged to abut against the outer wall of the grounding pin.
7. The probe grounding device according to claim 6, characterized in that: The adjusting screw is a machine screw.
8. An oscilloscope, characterized in that: It comprises a host and a probe connected to the host, wherein the probe is connected to the probe grounding device according to any one of claims 1 to 7.
9. The oscilloscope according to claim 8, characterized in that: The probe is also provided with a supporting bracket, and the supporting bracket is provided with two supporting legs.