CN222774604U - Reed body resistance measuring clamp - Google Patents
Reed body resistance measuring clamp Download PDFInfo
- Publication number
- CN222774604U CN222774604U CN202421139848.8U CN202421139848U CN222774604U CN 222774604 U CN222774604 U CN 222774604U CN 202421139848 U CN202421139848 U CN 202421139848U CN 222774604 U CN222774604 U CN 222774604U
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- probe
- cover plate
- resistance
- reed body
- base
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Abstract
The utility model discloses a reed body resistance measuring clamp which is characterized by comprising a positioning block, a base, a probe, a guide seat, a positioning plate and a cover plate, wherein the positioning block is connected with the base, the base is connected with the guide seat, the probe penetrates through the guide seat, the probe is connected with the cover plate, and the positioning plate is connected with the cover plate. The utility model provides a measuring clamp for measuring the resistance of a reed body, which can accurately and efficiently measure the resistance of the reed body, saves cost, ensures that a probe of the clamp moves up and down in a guide hole, ensures that the position of a contact point measured each time is the same and the surface of a detection part is not damaged, can apply the same pressure from the upper part of a cover plate, eliminates measurement errors caused by the contact pressure, and has higher measurement accuracy by using a 4-terminal resistance test method.
Description
Technical Field
The utility model belongs to the technical field of resistance measurement, and particularly relates to a reed body resistance measurement clamp.
Background
With the wide application of relays, the size of the relay body resistance directly affects the performance of the product. The relay body resistance is the sum of the body resistances of a plurality of reed and connecting rod parts. In order to ensure the stability of the overall performance of the relay, the bulk resistances of all parts in the relay must be basically consistent in batches.
The reed in the relay has smaller size, more number and higher measurement difficulty, and a great deal of time and labor are consumed when the reed body resistance is required to be measured with high precision. Therefore, there is a need for a measuring fixture that can fix the reed and measure the body resistance of the reed conveniently and quickly, saving time and human resources, but the prior art does not have a measuring fixture designed for the reed.
The patent publication No. CN211206625U discloses a resistance measuring clamp, which comprises a shell, a micro-distance sliding block, a first metal sliding block and a second metal sliding block, wherein the micro-distance sliding block, the first metal sliding block and the second metal sliding block are all arranged in the shell, a guide rib with a triangular cross section is arranged on the upper side of the micro-distance sliding block, a guide opening is arranged on the shell and opposite to the edge of the guide rib, the first metal sliding block and the second metal sliding block are respectively arranged on two sides of the guide rib and can be respectively connected with two poles of a resistance measuring instrument, a first electric wire and a second electric wire of a resistance to be measured are mutually separated under the action of the guide rib after entering from the guide opening, the first electric wire is clamped between the guide rib and the first metal sliding block, and the second electric wire is clamped between the guide rib and the second metal sliding block. However, the clamping force of the patent cannot be fixed, the contact pressure is different, the resistance is possibly caused to be different, the accuracy of the measurement result is not high enough, the clamping position is difficult to accurately locate at one position each time, the damage of parts is possibly caused, and the method is not suitable for the body resistance measurement of the reed.
The utility model discloses a chinese patent of publication No. CN204439671U, discloses a novel high tension switch return circuit resistance measurement anchor clamps, including chuck and the handheld pole that is equipped with the U-shaped clamp mouth, handheld pole with the chuck is with contained angle adjustable mode fixed connection, the inside of U-shaped clamp mouth is provided with along the bellied arc preforming of centre gripping direction, the outer end of arc preforming with be equipped with the spring that is used for providing clamping force for the arc preforming between chuck articulated and arc preforming and the chuck. However, the U-shaped clamp is provided with a clamping force by using a spring, the clamping force cannot be accurately controlled, the part to be measured is easy to damage, and the spring is not suitable for measuring the volume resistance of the reed.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a reed body resistance measuring clamp.
The utility model is realized by the following technical scheme.
The utility model provides a reed body resistance measuring clamp which comprises a positioning block, a base, a probe, a guide seat, a positioning plate and a cover plate, wherein the positioning block is connected with the base, the base is connected with the guide seat, the probe penetrates through the guide seat, the probe is connected with the cover plate, and the positioning plate is connected with the cover plate.
Preferably, the positioning block is connected with the base through a screw A.
Preferably, the positioning block is connected with a power supply.
Preferably, the base is connected with the guide seat through a screw B.
Preferably, a guide hole is formed in the guide seat, and the probe penetrates through the guide hole.
Preferably, a screw C is arranged on the positioning plate, a screw hole is arranged on the cover plate, and the screw C is connected with the screw hole.
Preferably, the probe is slidably connected to the guide holder.
Preferably, a wiring hole is formed in the cover plate, and the probe is communicated with the wiring hole.
The utility model has the beneficial effects that:
The measuring clamp for measuring the sheet resistance of the spring can accurately and efficiently measure the sheet resistance of the spring, saves cost, ensures that the probe of the clamp moves up and down in the guide hole, ensures that the positions of contact points measured each time are the same and the surface of a detected part is not damaged, can apply the same pressure from the upper part of the cover plate, eliminates measurement errors caused by the contact pressure, and has higher measurement accuracy by using a 4-terminal resistance test method.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a measuring jig according to an embodiment of the present utility model;
FIG. 2 is a schematic view of the internal structure of a measuring jig according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a back structure of a measuring fixture according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a 2-terminal test method according to an embodiment of the present utility model;
fig. 5 is a schematic circuit diagram of a 4-terminal test method according to an embodiment of the present utility model.
In the figure, a 1-positioning block, a 2-base, a 3-probe, a 4-guide seat, a 5-positioning plate, a 6-cover plate, a 7-screw A, an 8-screw B, a 10-screw C, an 11-screw hole and a 12-wiring hole are shown.
Detailed Description
The technical solution of the present utility model is further described below, but the scope of the claimed utility model is not limited to the above.
As shown in figures 1-3, the reed body resistance measuring clamp comprises a positioning block 1, a base 2, a probe 3, a guide seat 4, a positioning plate 5 and a cover plate 6, wherein the positioning block 1 is connected with the base 2, the base 2 is connected with the guide seat 4, the probe 3 penetrates through the guide seat 4, the probe 3 is connected with the cover plate 6, and the positioning plate 5 is connected with the cover plate 6.
The positioning block 1 is connected with the base 2 through a screw A7. The size of the positioning part is determined according to the size of the reed, if the reed is flat, the positioning part is processed into a step shape, and if the reed is round, the positioning part is processed into a V shape.
In the embodiment, the number of the positioning blocks 1 is two, the positioning positions are in a step shape, and the reed in a flat shape is measured.
The positioning block 1 is connected with a power supply.
The positioning block 1 is connected with a power supply through a screw A7 so as to electrify the tested part, and a 4-terminal test method can be realized.
The body resistance of the relay has a critical influence on the performance of the relay, and when the reed resistance is measured with high accuracy, the contact resistance between the probe and between the probe and the object to be measured becomes the biggest obstacle when the reed resistance in the relay is small by about 5mm×0.7mm×0.1 mm. The wiring resistance varies greatly depending on the thickness and length, and the contact resistance is greatly affected by probe wear, contact pressure, or measurement current, and may be several mΩ even in a good contact state, or may be several Ω.
As shown in fig. 4, when measured with the 2-terminal, the current I flows into the measured resistor R 0 and the wiring resistor R 1、r2. Therefore, the voltage to be measured is obtained from e=ir 1+R0+r2, and is a value including the wiring resistance r 1、r2. The conductor resistance of the test line itself is added to the resistance of the object to be tested, thereby causing an error.
Therefore, in order to measure the resistance of the reed reliably and with high accuracy, a 4-terminal test method is adopted.
As shown in fig. 5, the 4-terminal measurement adopts a configuration of a current source terminal for supplying a constant current and a voltage detection terminal for detecting a voltage drop. Since the input impedance of the voltmeter is high, the voltage detection terminal side wire connected to the object to be measured hardly flows a current, so that accurate measurement can be performed without being affected by the resistance of the test line or the contact resistance.
The current I flows from R 2 into R 1 through the measured resistor R 0. Because of the large input resistance of the voltmeter, current does not flow into r 3、r4. Thus the voltages of r 3 and r 4 drop to 0. The voltage E to be measured is equal to the voltage drop E 0 across the measured resistor R 0, and therefore the measured resistor is not affected by R 1～r4.
The base 2 is connected with the guide seat 4 through a screw B8. The guide seat 4 is connected by the screw B8, so that the guide seat 4 is ensured to be stable and can not shake.
The guide seat 4 is provided with a guide hole, and the probe 3 passes through the guide hole.
The probe 3 passes through the guide hole and can accurately contact with the measured point of the measured part to accurately measure the resistance of the measured part.
The probe 3 moves up and down in the guide hole, so that the same position of the contact point measured each time is ensured, and the surface of the detection part is not damaged.
The locating plate 5 is provided with a screw C10, the cover plate 6 is provided with a screw hole 11, and the screw C10 is connected with the screw hole 11.
The locating plate 5 is used for locating the cover plate 6, weights are added on the cover plate 6 to apply pressure, the cover plate 6 contacts the probe 3 to apply pressure to the probe 3, and the probe 3 contacts the tested part downwards.
It is thus possible to eliminate measurement errors due to contact pressure by applying the same pressure to the cover plate 6.
The locating plate 5 is also used for limiting the probe 3, so that the probe 3 cannot drop too much to damage parts and cannot easily deviate.
The cover plate 6 is provided with a wiring hole 12, and the probe 3 is communicated with the wiring hole 12.
The wiring hole is used for connecting the voltmeter to the probe 3, the pen point of the voltmeter is removed, and the connecting wire is welded on the probe 3.
The probe 3 is in sliding connection with the guide seat 4.
The probe 3 moves up and down in the guide hole, so that the same position of the contact point measured each time is ensured, and the surface of the detection part is not damaged.
The utility model provides a measuring clamp for measuring the resistance of a reed body, which can accurately and efficiently measure the resistance of the reed body, saves cost, ensures that a probe of the clamp moves up and down in a guide hole, ensures that the position of a contact point measured each time is the same and the surface of a detection part is not damaged, can apply the same pressure from the upper part of a cover plate, eliminates measurement errors caused by the contact pressure, and has higher measurement accuracy by using a 4-terminal resistance test method.
Claims (8)
1. The reed body resistance measuring clamp is characterized by comprising a positioning block (1), a base (2), a probe (3), a guide seat (4), a positioning plate (5) and a cover plate (6), wherein the positioning block (1) is connected with the base (2), the base (2) is connected with the guide seat (4), the probe (3) penetrates through the guide seat (4), the probe (3) is connected with the cover plate (6), and the positioning plate (5) is connected with the cover plate (6).
2. A reed body resistance measuring clamp as in claim 1, wherein the positioning block (1) is connected to the base (2) by a screw a (7).
3. A reed body resistance measuring clamp as in claim 1, wherein the positioning block (1) is connected to a power source.
4. A reed body resistance measuring clamp as in claim 1, wherein the base (2) is connected to the guide holder (4) by screws B (8).
5. A reed body resistance measuring clamp as in claim 1, wherein the guide holder (4) is provided with a guide hole through which the probe (3) passes.
6. A reed body resistance measuring clamp as claimed in claim 1, wherein the positioning plate (5) is provided with a screw C (10), the cover plate (6) is provided with a screw hole (11), and the screw C (10) is connected with the screw hole (11).
7. A reed body resistance measuring clamp as in claim 1, wherein the probe (3) is slidably connected to the guide holder (4).
8. A reed body resistance measuring clamp as claimed in claim 1, wherein the cover plate (6) is provided with a wiring hole (12), and the probe (3) is communicated with the wiring hole (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421139848.8U CN222774604U (en) | 2024-05-23 | 2024-05-23 | Reed body resistance measuring clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421139848.8U CN222774604U (en) | 2024-05-23 | 2024-05-23 | Reed body resistance measuring clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222774604U true CN222774604U (en) | 2025-04-18 |
Family
ID=95354302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421139848.8U Active CN222774604U (en) | 2024-05-23 | 2024-05-23 | Reed body resistance measuring clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222774604U (en) |
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2024
- 2024-05-23 CN CN202421139848.8U patent/CN222774604U/en active Active
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