Sample resistor with easy resistance adjustment

Abstract

This invention discloses a sampling resistor for easy resistance adjustment, comprising a mounting component, a strip-shaped resistor, and an operating component. The operating component has a clamping part and is movably inserted into the mounting component along its length. The clamping part clamps and cooperates with the strip-shaped resistor. By operating the operating component, the clamping part can be switched between a first position and a second position. In this invention, when the resistance value needs to be adjusted, by switching the clamping part from the first position to the second position and then back to the first position, the length of the strip-shaped resistor can be quantitatively adjusted, thereby easily and accurately adjusting the resistance value. Compared with the traditional mode of switching between multiple fixed resistance values, this resistance adjustment method is more versatile. At the same time, compared with the sliding variable resistor mode, it can achieve the calibrated resistance value more easily and accurately, greatly improving the efficiency and accuracy of resistance adjustment.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, specifically to a sampling resistor that is easy to adjust. Background Technology

[0002] As a key component in electronic circuits used to acquire electrical signals such as current and voltage, the performance and adjustment method of sampling resistors have a crucial impact on the overall performance of electronic devices. Currently available sampling resistors have many shortcomings in implementing resistance adjustment functionality.

[0003] Sampling resistors that switch between multiple fixed resistance values ​​have poor versatility. Different electronic devices or circuits often have specific and diverse requirements for the resistance value of the sampling resistor, and this fixed resistance value switching method can only provide a limited number of preset resistance values, making it difficult to flexibly meet various complex and changing practical application scenarios. While sampling resistors using a sliding variable resistance mode can achieve continuous resistance value changes to some extent, in actual testing, they suffer from cumbersome operation and difficulty in accurately achieving the calibrated resistance value. In practice, operators need to repeatedly adjust the position of the sliding component, relying on experience and multiple attempts to approximate the required resistance value. This not only consumes a lot of time and effort, but also, due to the instability of manual operation, it is difficult to accurately adjust the resistance value to the ideal calibrated state every time. Utility Model Content

[0004] To solve the above-mentioned technical problems, the main objective of this utility model is to provide a sampling resistor that is versatile and has a simpler and more accurate resistance adjustment method.

[0005] To achieve the above objectives, this utility model proposes a sampling resistor that is easy to adjust, comprising:

[0006] The mounting component has a limiting groove, and the mounting component is connected to the first sampling point;

[0007] A strip-shaped resistor having a first end and a second end arranged opposite each other along its length, the first end constituting a second sampling point, the strip-shaped resistor being movably inserted into the mounting member along its length; and...

[0008] An operating member having a clamping portion, the operating member being relatively movable along its length through the mounting member, such that the clamping portion has a first position located within the limiting groove and a second position located outside the limiting groove;

[0009] Specifically, when the clamping part is in the first position, its outer periphery is limited by the mounting member, and it clamps the strip-shaped resistor at any point between the first end and the second end, so that the strip-shaped resistor conducts the first sampling point; when the clamping part is in the second position, it is no longer limited by the mounting member, and it releases the strip-shaped resistor; during the process of the clamping part moving from the first position to the second position, it drives the strip-shaped resistor to move relative to the mounting member along its length direction; during the process of the clamping part moving from the second position to the first position, it moves relative to the strip-shaped resistor, thereby changing the clamping position of the strip-shaped resistor.

[0010] Optionally, the sampling resistor further includes a resilient reset element disposed between the operating element and the mounting element, the resilient reset element providing a reset force that returns the clamping portion from the second position to the first position.

[0011] Optionally, the operating member has a guide channel extending along its length, and the strip-shaped resist passes through the guide channel.

[0012] Optionally, the operating member includes the clamping part and the first sleeve part arranged sequentially along the length direction, wherein the clamping part is relatively close to the first end, the limiting groove has an opening facing the first end, the bottom wall of the limiting groove opposite to the opening is provided with an opening, the first sleeve part passes through the opening, and the outer diameter of the first sleeve part is smaller than that of the clamping part, and the elastic reset member is a compression spring sleeved on the outer periphery of the first sleeve part.

[0013] Optionally, the operating member further includes a second sleeve portion disposed at one end of the first sleeve portion away from the clamping portion, the outer diameter of the second sleeve portion being larger than that of the first sleeve portion, such that the outer periphery of the operating member forms a stepped surface facing the bottom wall, one end of the compression spring abutting against the bottom wall, and the other end abutting against the stepped surface.

[0014] Optionally, the first socket and the second socket are made of insulating material.

[0015] Optionally, the operating component further includes a handle portion disposed at one end of the second socket portion away from the first socket portion, wherein the outer diameter of the handle portion is larger than that of the first socket portion.

[0016] Optionally, the sampling resistor further includes a housing, which is cylindrical in shape, and the mounting member is fixed inside the housing. A guide groove is provided at the end of the housing in the length direction, and the first sleeve is slidably fitted in the guide groove along the length direction.

[0017] Optionally, the outer casing has an installation port at one end opposite to the guide groove, and the sampling resistor further includes a cover portion that blocks the installation port. One end of the cover portion is inserted into the outer casing and abuts against the mounting component, and the end of the cover portion that extends out of the outer casing constitutes the first sampling point.

[0018] Optionally, the clamping part includes a plurality of jaws, which remain in an open position that is far apart from each other when no external force is applied.

[0019] The technical solution provided by this utility model has the following beneficial effects:

[0020] This utility model provides an easily adjustable sampling resistor comprising a mounting component, a strip-shaped resistor, and an operating component. The operating component has a clamping part, which is movably inserted into the mounting component along its length. The clamping part engages with the strip-shaped resistor. By operating the operating component, the clamping part can switch between a first position and a second position. During the movement of the clamping part from the first position to the second position, the clamping part disengages from the limiting groove, causing the strip-shaped resistor to move relative to the mounting component along its length. During the movement of the clamping part from the second position to the first position, it moves relative to the strip-shaped resistor and returns to the limiting groove, thereby changing the clamping position on the strip-shaped resistor. In other words, the operator can operate the operating component according to adjustment needs. When the resistance value needs adjustment, by switching the clamping part from the first position to the second position and back to the first position, the length of the strip-shaped resistor can be quantitatively adjusted, thus easily and accurately adjusting the resistance value. Compared to the traditional method of switching between multiple fixed resistance values, this resistance adjustment method is more versatile and can meet the diverse needs for resistance values ​​in different scenarios. Meanwhile, compared with the sliding resistance mode, there is no need to repeatedly operate during the test. By precisely controlling the position of the clamping part, the calibrated resistance value can be achieved more easily and accurately, which greatly improves the efficiency and accuracy of resistance adjustment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 A cross-sectional schematic diagram of an embodiment of the adjustable sampling resistor provided by this utility model, wherein the clamping part is located in the first position;

[0023] Figure 2 for Figure 1 A cross-sectional view of the sampling resistor, with the clamping part located in the second position;

[0024] Figure 3 for Figure 1 Enlarged schematic diagram of the mounting components;

[0025] Figure 4 for Figure 1 Enlarged schematic diagram of the central operating component;

[0026] Figure 5 for Figure 1 Enlarged schematic diagram of the inner and outer shell;

[0027] Figure 6 for Figure 1 Enlarged schematic diagram of the middle cover body.

[0028] Explanation of icon numbers:

[0029] 100 - Sampling resistor; 101 - First sampling point; 102 - Second sampling point; 10 - Mounting component; 11 - Limiting groove; 111 - Opening; 112 - Bottom wall; 113 - Opening; 20 - Strip-shaped resistor; 21 - First end; 22 - Second end; 30 - Operating component; 31 - Clamping part; 311 - Claw; 32 - Guide channel; 33 - First socket part; 34 - Second socket part; 341 - Stepped surface; 35 - Handle part; 40 - Elastic reset component; 50 - Housing; 51 - Guide groove; 52 - Mounting port; 60 - Cover part.

[0030] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0031] 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.

[0032] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] Please see Figures 1 to 6 This utility model provides a sampling resistor 100 that is easy to adjust. Please refer to [link / reference]. Figure 1 and Figure 2 The sampling resistor 100 includes a mounting member 10, a strip resistor 20, and an operating member 30. The mounting member 10 has a limiting groove 11 and connects to a first sampling point 101. The strip resistor 20 has a first end 21 and a second end 22 arranged opposite each other along its length. The first end 21 forms a second sampling point 102. The strip resistor 20 is movably inserted into the mounting member 10 along its length. The operating member 30 has a clamping portion 31, which is movably inserted into the mounting member 10 along its length, such that the clamping portion 31 has a first position located within the limiting groove 11 and a second position located outside the limiting groove 11. It is understood that the mounting part 10 and the clamping part 31 are generally made of conductive materials such as brass. The limiting groove 11 is used to limit the clamping part 31 in the circumferential direction. When the clamping part 31 is located in the limiting groove 11, it clamps the strip-shaped resistor 20. The current flowing through the resistor can be conducted through the clamping part 31 and the mounting part 10 to the first sampling point 101. When the position of the clamping part 31 clamping the strip-shaped resistor 20 changes, the range of values ​​of the strip-shaped resistor 20 can be adjusted.

[0035] In this embodiment, when the clamping part 31 is in the first position, its outer periphery is limited by the mounting member 10, and it clamps the strip-shaped resistor 20 at either end 21 or the second end 22, so that the strip-shaped resistor 20 conducts the first sampling point 101. When the clamping part 31 is in the second position, it is no longer limited by the mounting member 10, and it releases the strip-shaped resistor 20. During the movement of the clamping part 31 from the first position to the second position, it causes the strip-shaped resistor 20 to move relative to the mounting member 10 along its length. During the movement of the clamping part 31 from the second position to the first position, it moves relative to the strip-shaped resistor 20, thereby changing the clamping position of the strip-shaped resistor 20.

[0036] In this embodiment, the length direction refers to the length extension direction of the strip resistor. When the resistance value needs to be adjusted, the clamping part 31 can be switched to the second position by operating the operating member 30, and the strip resistor can be pulled to adjust its clamping position by the clamping part 31 so that the resistance value is close to the target resistance value. Then, by operating the operating member 30 once or multiple times, by switching the clamping part 31 from the first position to the second position and then back to the first position, the length of the strip resistor 20 can be quantitatively adjusted, thereby easily and accurately adjusting the resistance value. Compared with the traditional mode of switching between multiple fixed resistance values, this resistance adjustment method is more versatile and can meet the diverse needs for resistance values ​​in different scenarios. At the same time, compared with the sliding variable resistance mode, there is no need to repeatedly operate during the test. By precisely controlling the position of the clamping part 31, the calibrated resistance value can be achieved more easily and accurately, greatly improving the efficiency and accuracy of resistance adjustment.

[0037] The structure of the clamping part 31 can be designed according to needs, as long as it can be clamped under the action of the limiting groove 11 and open when it is disengaged from the limiting groove 11. In this embodiment, please continue to refer to Figure 4 The clamping part 31 consists of multiple jaws 311, which remain open when no external force is applied. Specifically, the number, shape, and elasticity of the jaws 311 can be designed according to the characteristics of the strip-shaped resist 20. The design of multiple jaws 311 can better adapt to strip-shaped resist 20s of different sizes, providing a more stable clamping force. This design enhances the clamping stability and reliability of the clamping part 31 for the strip-shaped resist 20, further improving the accuracy and effect of resistance adjustment.

[0038] Furthermore, the sampling resistor 100 also includes an elastic reset member 40, which is disposed between the operating member 30 and the mounting member 10. The elastic reset member 40 provides a reset force to return the clamping part 31 from the second position to the first position. In specific implementation, the elastic coefficient of the elastic reset member 40 can be selected according to the force required for actual operation. For example, a spring with a smaller elastic coefficient is selected when gentle operation is required. When high operational stability is required, a spring with a larger elastic coefficient is selected. In this embodiment, the operator applies external force to operate the operating member 30, causing the clamping part 31 to move from the first position to the second position, driving the strip-shaped resistor 20 to move. The elastic reset member 40 then provides a reset force to return the clamping part 31 to the first position, changing the clamping position of the strip-shaped resistor 20, and facilitating the next resistance adjustment operation. This design makes the resistance adjustment operation more convenient, eliminating the need to manually reset the operating member 30 each time, improving work efficiency, and also reducing the possibility of the operating member 30 not returning to its original position due to improper operation, which could affect the subsequent resistance adjustment accuracy.

[0039] Furthermore, the operating member 30 has a guide channel 32 extending along its length, through which the strip-shaped resist 20 passes. Specifically, the dimensions of the guide channel 32 can be precisely designed according to the diameter of the strip-shaped resist 20, ensuring that the strip-shaped resist 20 can move freely within it without excessive swaying. In this embodiment, the guide channel 32 provides a stable guide for the movement of the strip-shaped resist 20, ensuring that the strip-shaped resist 20 moves in a predetermined direction under the action of the operating member 30, avoiding deviation, thereby improving the accuracy of resistance adjustment.

[0040] Please continue to refer to the following: Figure 3 and Figure 4 The operating component 30 includes a clamping portion 31 and a first sleeve portion 33 arranged sequentially along its length. The clamping portion 31 is relatively close to the first end 21. The limiting groove 11 has an opening 111 facing the first end 21. An opening 113 is formed on the bottom wall 112 of the limiting groove 11 opposite to the opening 111. The first sleeve portion 33 passes through the opening 113, and the outer diameter of the first sleeve portion 33 is smaller than that of the clamping portion 31. The elastic reset component 40 is a compression spring sleeved on the outer periphery of the first sleeve portion 33. In this embodiment, the length and outer diameter of the first sleeve portion 33 need to be precisely designed according to the specifications of the compression spring and the structure of the mounting component 10 to ensure that the compression spring can be stably installed and function. This structural design not only makes the installation of the elastic reset component 40 more stable, but also realizes the elastic reset function of the operating component 30 by utilizing the characteristics of the compression spring, thereby enhancing the reliability and ease of operation of the sampling resistor 100.

[0041] Furthermore, the operating member 30 also includes a second sleeve portion 34 disposed at the end of the first sleeve portion 33 away from the clamping portion 31. The outer diameter of the second sleeve portion 34 is larger than that of the first sleeve portion 33, so that the outer periphery of the operating member 30 forms a stepped surface 341 facing the bottom wall 112. One end of the compression spring abuts against the bottom wall 112, and the other end abuts against the stepped surface 341. In this embodiment, the presence of the stepped surface 341 provides a stable abutment position for the compression spring, ensuring that the compression spring will not be displaced during operation, thereby ensuring the stable realization of the elastic reset function. This design further enhances the working effect of the elastic reset member 40 and improves the stability and reliability of the sampling resistor 100 operation.

[0042] Preferably, the first socket 33 and the second socket 34 are made of insulating material. This effectively prevents current leakage between the operating member 30 and the mounting member 10, avoiding any impact on the normal operation and safety of the sampling resistor 100 due to leakage.

[0043] Please continue reading. Figure 4 The operating component 30 further includes a handle portion 35 disposed at the end of the second socket portion 34 away from the first socket portion 33, the outer diameter of the handle portion 35 being larger than that of the first socket portion 33. Thus, the design of the handle portion 35 facilitates user operation of the operating component 30; by holding the handle portion 35, the user can more easily and accurately press the operating component 30 to achieve the resistance adjustment function.

[0044] Please continue to refer to the following: Figure 5 The sampling resistor 100 also includes a housing 50, which is cylindrical in shape, and the mounting member 10 is fixed within the housing 50. The housing 50 should be made of an insulating and robust material, such as engineering plastic. A guide groove 51 is provided at the longitudinal end of the housing 50, and the first sleeve portion 33 is slidably fitted into the guide groove 51 along its length. The housing 50 protects the internal mounting member 10, strip-shaped resistor 20, and operating member 30 from external environmental influences. Furthermore, the guide groove 51 guides the movement of the first sleeve portion 33, ensuring more stable movement of the operating member 30. This design improves the protective performance and operational stability of the sampling resistor 100, enabling it to operate reliably in various environments.

[0045] For further information, please refer to [link / reference]. Figure 6The outer casing 50 has a mounting port 52 at one end opposite to the guide groove 51. The sampling resistor 100 also includes a cover portion 60 that seals the mounting port 52. One end of the cover portion 60 is inserted into the outer casing 50 and abuts against the mounting member 10. The end of the cover portion 60 extending out of the outer casing 50 constitutes the first sampling point 101. Specifically, the shape and size of the cover portion 60 need to be precisely matched with the mounting port 52 to ensure a good sealing effect. For example, a sealing gasket can be provided at the contact point between the cover portion 60 and the mounting port 52 to enhance waterproof and dustproof performance. In this embodiment, the cover portion 60 not only seals the mounting port 52 of the outer casing 50 and protects the internal structure, but also serves as the first sampling point 101 to realize the electrical connection function. This design makes the structure of the sampling resistor 100 more compact and reasonable, and also facilitates the installation and maintenance of the internal structure.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A sampling resistor that is easy to adjust, characterized in that, include: The mounting component has a limiting groove, and the mounting component is connected to the first sampling point; A strip-shaped resistor having a first end and a second end arranged opposite each other along its length, the first end constituting a second sampling point, the strip-shaped resistor being movably inserted into the mounting member along its length; and... An operating member having a clamping portion, the operating member being relatively movable along its length through the mounting member, such that the clamping portion has a first position located within the limiting groove and a second position located outside the limiting groove; Specifically, when the clamping part is in the first position, its outer periphery is limited by the mounting member, and it clamps the strip-shaped resistor at any point between the first end and the second end, so that the strip-shaped resistor conducts the first sampling point; when the clamping part is in the second position, it is no longer limited by the mounting member, and it releases the strip-shaped resistor; during the process of the clamping part moving from the first position to the second position, it drives the strip-shaped resistor to move relative to the mounting member along its length direction; during the process of the clamping part moving from the second position to the first position, it moves relative to the strip-shaped resistor, thereby changing the clamping position of the strip-shaped resistor.

2. The easily adjustable sampling resistor as described in claim 1, characterized in that, The sampling resistor further includes an elastic reset element disposed between the operating element and the mounting element, the elastic reset element providing a reset force that returns the clamping portion from the second position to the first position.

3. The easily adjustable sampling resistor as described in claim 2, characterized in that, The operating element has a guide channel extending along its length, and the strip-shaped resist passes through the guide channel.

4. The easily adjustable sampling resistor as described in claim 3, characterized in that, The operating component includes a clamping portion and a first sleeve portion arranged sequentially along the length direction, wherein the clamping portion is relatively close to the first end, the limiting groove has an opening facing the first end, the bottom wall of the limiting groove opposite to the opening is provided with an opening, the first sleeve portion passes through the opening, and the outer diameter of the first sleeve portion is smaller than that of the clamping portion, and the elastic reset member is a compression spring sleeved on the outer periphery of the first sleeve portion.

5. The easily adjustable sampling resistor as described in claim 4, characterized in that, The operating component further includes a second sleeve portion disposed at one end of the first sleeve portion away from the clamping portion. The outer diameter of the second sleeve portion is larger than that of the first sleeve portion, so that the outer periphery of the operating component forms a stepped surface facing the bottom wall. One end of the compression spring abuts against the bottom wall, and the other end abuts against the stepped surface.

6. The easily adjustable sampling resistor as described in claim 5, characterized in that, The first socket and the second socket are made of insulating material.

7. The easily adjustable sampling resistor as described in claim 5, characterized in that, The operating component further includes a handle portion disposed at one end of the second socket portion away from the first socket portion, wherein the outer diameter of the handle portion is larger than that of the first socket portion.

8. The easily adjustable sampling resistor as described in claim 5, characterized in that, The sampling resistor also includes a housing, which is cylindrical in shape. The mounting component is fixed inside the housing. A guide groove is provided at the end of the housing in the length direction, and the first sleeve is slidably fitted in the guide groove along the length direction.

9. The easily adjustable sampling resistor as described in claim 8, characterized in that, The outer casing has an installation port at one end opposite to the guide groove. The sampling resistor also includes a cover portion that blocks the installation port. One end of the cover portion is inserted into the outer casing and abuts against the mounting component. The end of the cover portion that extends out of the outer casing constitutes the first sampling point.

10. The easily adjustable sampling resistor as described in any one of claims 2 to 9, characterized in that, The clamping part includes multiple jaws, which remain in an open position that is far apart from each other when no external force is applied.

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