Resistance value detection device for low-resistance chip resistor

Abstract

The utility model discloses a resistance value detection device for a low-resistance chip resistor. The resistance value detection device comprises a support frame; the beneficial effects of the utility model are that through the arrangement of the adjusting support plate, the support side support plate and the limiting plate, the support side support plate at one side of the adjusting support plate can limit and support the low-resistance chip resistor with resistance detection; the low-resistance chip resistor placed on the supporting side supporting plate is placed in a limited mode through the limiting plate sliding on the top of the supporting side supporting plate, and the placement position is adjusted according to the contact position of a probe on the top of the PCB and the bottom of the low-resistance chip resistor; the first adjusting bolt of the supporting bottom frame is rotated, the supporting heights of the supporting plate, the PCB and the probe are adjusted through the first adjusting bolt, the probe on the top of the PCB makes contact with the bottom of the low-resistance chip resistor, and resistance detection of the low-resistance chip resistor is completed.

Description

Technical Field

[0001] This utility model relates to the field of resistance detection technology, specifically a low-resistance chip resistor resistance detection device. Background Technology

[0002] Low-resistance chip resistors, as a type of electronic component, have unique characteristics and a wide range of applications. Low-resistance chip resistors, also known as low-resistance surface mount resistors, are a type of metal-glass axial resistor. Their resistance value is usually less than 1 ohm, or even lower to the milliohm level. These resistors are fabricated on a substrate using screen printing or thin-film technology, featuring miniaturization and surface mounting. Detecting the resistance of low-resistance chip resistors is a crucial electronic measurement process, and its accuracy is vital to circuit performance. A dual-arm bridge tester is specifically designed for measuring low resistance values, offering high precision and stability. Its measurement principle is based on the Wheatstone bridge; by adjusting the resistance of the bridge arms to achieve balance, the resistance value of the resistor under test can be calculated. However, when using a dual-arm bridge tester to test low-resistance chip resistors, the resistance is very small (often below 1Ω, even 1mΩ). The impedance generated by the probe contact may be similar to or greater than the measured resistance value, leading to large and unreliable measurement results. Furthermore, changes in the probe contact position significantly affect the consistency of resistance measurement results for milliohm-level resistors, reducing the accuracy and reliability of the measurement. Traditional methods share current and voltage detection points, effectively still involving two-wire measurements, which introduces contact impedance issues, affecting the accurate detection of low-resistance values. Utility Model Content

[0003] The purpose of this invention is to provide a low-resistance chip resistor value detection device to solve the problem mentioned in the background art that the traditional method uses the same current and voltage detection points, which is actually a two-wire measurement and has contact impedance problems, affecting the accurate detection of low-resistance values.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-resistance chip resistor value detection device, comprising:

[0005] Support frame;

[0006] The No. 3 adjusting bolt is symmetrically threaded inside the support frame;

[0007] The adjusting support plate is rotatably mounted on one end of the No. 3 adjusting bolt.

[0008] A limiting component is provided, which is located on one side of the adjusting support plate. The limiting component includes a supporting side plate, which is disposed on one side of the adjusting support plate. A limiting plate is symmetrically and slidably disposed on the top of the supporting side plate.

[0009] A support base frame is installed at the bottom of the support frame;

[0010] The No. 1 adjusting bolt has its thread located inside the support base frame.

[0011] The support plate is rotatably mounted on the top of the No. 1 adjusting bolt;

[0012] A PCB board is mounted on top of a support plate, and four probes are symmetrically arranged on the top of the PCB board.

[0013] As a preferred embodiment of this utility model: the interior of the supporting side plate is symmetrically provided with T-shaped grooves, and a T-shaped slider is slidably connected inside the T-shaped groove. The top of the T-shaped slider is fixedly connected to the limiting plate, and a fixed side block is fixedly connected to one side of the limiting plate. A tightening bolt is threaded inside the fixed side block.

[0014] As a preferred embodiment of this utility model: an outer sliding frame is slidably provided on the top of the support frame, a limiting block is symmetrically fixed to the inner side of the outer sliding frame, a limiting groove is symmetrically provided on the outer side of the support frame, the limiting block is slidably connected to the limiting groove, a second adjusting bolt is threadedly connected to the inner side of the outer sliding frame, and a rubber pressure block is rotatably provided at the bottom end of the second adjusting bolt.

[0015] As a preferred embodiment of this utility model: a second limiting slide rod is symmetrically fixed to one side of the adjusting support plate, the second limiting slide rod is slidably connected to the support frame, and a scale is fixed to one side of the adjusting support plate, the scale is slidably connected to the support frame.

[0016] As a preferred embodiment of this utility model: a first limiting slide rod is symmetrically fixed to the bottom of the support plate, the first limiting slide rod is slidably connected to the support base, and a wire is installed at the bottom of the PCB board, one end of the wire is connected to a double-arm bridge tester.

[0017] As a preferred embodiment of this utility model: an outer fixing plate is symmetrically fixed to the outer side of the support frame, and the outer fixing plate is installed with the support base frame by bolts.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting an adjusting support plate, a supporting side support plate, and a limiting plate, realizes that the supporting side support plate on one side of the adjusting support plate provides limiting support for the low-resistance chip resistor for resistance value detection. The limiting plate sliding on the top of the supporting side support plate limits the placement of the low-resistance chip resistor placed on the supporting side support plate. The placement position is adjusted according to the contact position between the probe on the top of the PCB board and the bottom of the low-resistance chip resistor. By setting an adjusting bolt and a supporting plate, the adjusting bolt of the supporting base can be rotated. The supporting height of the supporting plate, PCB board, and probe is adjusted by the adjusting bolt, and the contact between the probe on the top of the PCB board and the bottom of the low-resistance chip resistor is completed. Two of the probes are current probes, used to provide constant current to the chip resistor, and the other two probes are voltage probes, used to detect the voltage across the chip resistor. The connection method of the four probes to the double-arm bridge tester is the prior art, which completes the resistance value detection of the low-resistance chip resistor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the support frame and support base structure of this utility model;

[0021] Figure 3 This is a top view of the support frame of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall structure of the support frame of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the support side plate of this utility model.

[0024] In the diagram: 1. Support frame; 2. Support base; 3. Adjusting bolt No. 1; 4. Support plate; 5. Limiting slide rod No. 1; 6. PCB board; 7. Probe; 8. Wire; 9. Outer sliding frame; 10. Limiting block; 11. Limiting slide groove; 12. Adjusting bolt No. 2; 13. Rubber pressure block; 14. Adjusting bolt No. 3; 15. Support side plate; 16. Limiting plate; 17. Adjusting support plate; 18. T-shaped slide groove; 19. T-shaped slider; 20. Fixed side block; 21. Tightening bolt; 22. Limiting slide rod No. 2; 23. Scale; 24. Outer fixing plate; 25. Double-arm bridge tester. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1 to 5 This utility model provides a technical solution: a low-resistance chip resistor resistance detection device, comprising: a support frame 1; three adjusting bolts 14 symmetrically threaded inside the support frame 1; an adjusting support plate 17 rotatably disposed at one end of the three adjusting bolts 14; a limiting component disposed on one side of the adjusting support plate 17, the limiting component including a supporting side support plate 15, the supporting side support plate 15 being fixedly connected to one side of the adjusting support plate 17, and a limiting plate 16 symmetrically slidably disposed on the top of the supporting side support plate 15; a support base 2 installed at the bottom of the support frame 1; a first adjusting bolt 3 threaded inside the support base 2; a support plate 4 rotatably disposed at the top of the first adjusting bolt 3; and a PCB board 6 installed on the top of the support plate 4 by bolts, with four probes 7 symmetrically disposed on the top of the PCB board 6.

[0027] It is understood that, by rotating the tightening bolt 21 upwards, the tightening bolt 21 releases the tightening of the support side plate 15, thereby adjusting the limiting plate 16 and the T-shaped slider 19. The two limiting plates 16 limit the low-resistance chip resistor above the support side plate 15. By rotating the third adjusting bolt 14, the third adjusting bolt 14 moves, driving the adjusting plate 17, the support side plate 15, and the limiting plate 16 at one end to move. The limiting plate 16, the adjusting plate 17, and the support side plate 15 limit the placement of the low-resistance chip resistor. The outer fixing plates 24 on both sides of the support frame 1 are installed with bolts to the support base frame 2. The bolts are removed to remove the support frame 1, and the PCB board 6 and probe 7 adapted to the low-resistance chip resistor are replaced and installed. The PCB board 6 is installed on the support plate 4 with bolts, and then the support frame 1 is installed on the support base frame 2, driving the outer sliding frame 9 to move. The outer sliding frame 9 drives... The limiting block 10 slides within the limiting groove 11. By rotating the second adjusting bolt 12 downwards, the second adjusting bolt 12 drives the rubber pressure block 13 to move downwards, pressing the low-resistance chip resistor and limiting the detection position. By rotating the first adjusting bolt 3, the height of the top support plate 4 is adjusted. The support plate 4 drives the PCB board 6 and probes 7 to move upwards. The probes 7 contact the bottom detection position of the low-resistance chip resistor, completing the contact between the top probes 7 of the PCB board 6 and the bottom of the low-resistance chip resistor. Two of the probes 7 are current probes, used to provide constant current to the chip resistor, and the other two probes 7 are voltage probes, used to detect the voltage across the chip resistor. The connection method of the four probes 7 to the double-arm bridge tester 25 is existing technology, completing the resistance value detection of the low-resistance chip resistor. The resistance value detection is performed by connecting to the external double-arm bridge tester 25 through the wire 8.

[0028] Please see Figures 1 to 5 The support side plate 15 has symmetrically opened T-shaped grooves 18 inside, and T-shaped sliders 19 are slidably connected inside the T-shaped grooves 18. The top of the T-shaped sliders 19 is fixedly connected to the limiting plate 16. A fixed side block 20 is fixedly connected to one side of the limiting plate 16, and a tightening bolt 21 is threadedly connected inside the fixed side block 20.

[0029] It is understood that this utility model limits the sliding of the T-shaped slider 19 within the T-shaped groove 18, and the limiting plate 16 slides on the top of the supporting side plate 15 to limit the low-resistance chip resistor placed on the supporting side plate 15, thereby improving the positional stability of the low-resistance chip resistor during resistance detection.

[0030] Please see Figures 1 to 5The top of the support frame 1 is slidably provided with an outer sliding frame 9. The inner side of the outer sliding frame 9 is symmetrically fixed with a limiting block 10. The outer side of the support frame 1 is symmetrically provided with a limiting groove 11. The limiting block 10 and the limiting groove 11 are slidably connected. The inner thread of the outer sliding frame 9 is connected with a second adjusting bolt 12. The bottom end of the second adjusting bolt 12 is rotatably provided with a rubber pressure block 13.

[0031] It is understood that this utility model adjusts the height of the rubber pressure block 13 by means of the No. 2 adjusting bolt 12 connected by the internal thread of the outer sliding frame 9, and presses the position of the low resistance plate resistor by means of the rubber pressure block 13, thereby improving stability.

[0032] Please see Figures 1 to 5 A second limiting slide rod 22 is symmetrically fixed to one side of the adjusting support plate 17. The second limiting slide rod 22 is slidably connected to the support frame 1. A scale 23 is fixed to one side of the adjusting support plate 17. The scale 23 is slidably connected to the support frame 1.

[0033] It is understood that, in this utility model, when the adjusting support plate 17 at one end is adjusted by the adjusting bolt 14, the adjusting support plate 17 drives the second limiting slide rod 22 to slide against the support frame 1, thereby improving the stability of the adjustment of the adjusting support plate 17. The position of the adjusting support plate 17 is monitored by the scale 23.

[0034] Please see Figures 1 to 5 A first limiting slide rod 5 is symmetrically fixed to the bottom of the support plate 4. The first limiting slide rod 5 is slidably connected to the support base 2. A wire 8 is installed at the bottom of the PCB board 6. One end of the wire 8 is connected to a double-arm bridge tester 25.

[0035] It is understood that the connection method of the four probes 7 to the double-arm bridge tester 25 is the existing technology to complete the resistance value detection of the low-resistance chip resistor. The resistance value detection is performed by connecting the double-arm bridge tester 25 to the outside through the wires 8.

[0036] Please see Figures 1 to 5 An outer fixing plate 24 is symmetrically fixed to the outside of the support frame 1, and the outer fixing plate 24 is installed with the support base frame 2 by bolts.

[0037] It is understood that the present invention uses an external fixing plate 24 connected to the support base 2 by bolts to install and fix the support frame 1 on the support base 2.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-resistance chip resistor resistance detection device, characterized in that, include: Support frame (1); Adjusting bolt No. 3 (14) is symmetrically threaded inside the support frame (1); Adjusting support plate (17), which is rotatably mounted on one end of the No. 3 adjusting bolt (14); A limiting component is placed on one side of the adjusting support plate (17). The limiting component includes a supporting side support plate (15), which is disposed on one side of the adjusting support plate (17). A limiting plate (16) is symmetrically slidably disposed on the top of the supporting side support plate (15). Support base frame (2) is installed at the bottom of support frame (1); Adjusting bolt No. 1 (3) has its thread set inside the support base frame (2); Support plate (4), which is rotatably mounted on the top of the first adjusting bolt (3); PCB board (6) is mounted on top of support plate (4), and four probes (7) are symmetrically arranged on the top of PCB board (6).

2. The low-resistance chip resistor resistance detection device according to claim 1, characterized in that: The support side plate (15) is symmetrically provided with T-shaped grooves (18) inside. A T-shaped slider (19) is slidably connected inside the T-shaped groove (18). The top of the T-shaped slider (19) is fixedly connected to the limiting plate (16). A fixed side block (20) is fixedly connected to one side of the limiting plate (16). A tightening bolt (21) is threadedly connected inside the fixed side block (20).

3. The low-resistance chip resistor resistance detection device according to claim 1, characterized in that: The top of the support frame (1) is slidably provided with an outer sliding frame (9), and the inner side of the outer sliding frame (9) is symmetrically fixed with a limiting block (10). The outer side of the support frame (1) is symmetrically provided with a limiting groove (11). The limiting block (10) is slidably connected with the limiting groove (11). The inner side of the outer sliding frame (9) is threaded with a second adjusting bolt (12), and the bottom end of the second adjusting bolt (12) is rotatably provided with a rubber pressure block (13).

4. The low-resistance chip resistor resistance detection device according to claim 1, characterized in that: A second limiting slide rod (22) is symmetrically fixed to one side of the adjusting support plate (17). The second limiting slide rod (22) is slidably connected to the support frame (1). A scale (23) is fixed to one side of the adjusting support plate (17). The scale (23) is slidably connected to the support frame (1).

5. The low-resistance chip resistor resistance detection device according to claim 1, characterized in that: A first limiting slide rod (5) is symmetrically fixed to the bottom of the support plate (4). The first limiting slide rod (5) is slidably connected to the support base (2). A wire (8) is installed at the bottom of the PCB board (6). One end of the wire (8) is connected to a double-arm bridge tester (25).

6. The low-resistance chip resistor resistance detection device according to claim 1, characterized in that: An outer fixing plate (24) is symmetrically fixed to the outside of the support frame (1), and the outer fixing plate (24) is installed with the support base frame (2) by bolts.

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