Detection device for measuring resistance value of silver layer

Abstract

A detection device for measuring the resistance value of a silver layer comprises a detection table, the detection table is provided with a base and a guide column installed at the front end of the base, the guide column is movably connected with a resistance measuring instrument, and the resistance measuring instrument is provided with an ejector pin extending downwards, and is characterized in that the base is provided with a limiting seat arranged at the lower end of the resistance measuring instrument; a clamp capable of moving transversely and longitudinally is arranged in the limiting base, a clamping cavity is formed in the clamp, and the clamping cavity can contain a plurality of electrical contacts coated with silver layers at the same time. The beneficial effects of the utility model lie in that a plurality of electrical contacts to be detected can be simultaneously clamped by using the specially-made clamp, the resistance values of the silver layers of the plurality of electrical contacts to be detected can be rapidly detected by moving the clamp left and right, the working efficiency is improved, the spacing of the clamping cavities of the clamp is adjustable, and the clamp is suitable for the silver layers with various thicknesses.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a detection device for measuring the resistance value of a silver layer. Background Art

[0002] The finished composite contact is assembled through several parts (such as the copper base and two silver layers of the three-composite rivet contact). When conducting electricity, several parts need to contact each other, which will cause contact resistance problems at the contact points. If the resistance value of the silver layer is too large or too small, it will directly affect the heat generation and service life of the silver layer. That is, the resistance value of the silver layer must be within a certain range. Therefore, surface resistance detection is required.

[0003] Publication No. CN203376401U discloses a surface resistance detection device for detecting the surface resistance of a composite contact, which includes a force gauge and a fixture that can move relatively therewith, wherein the measuring head of the force gauge is arranged opposite to the fixture; and the positive and negative electrodes of a resistance tester are arranged correspondingly on the relative inner sides of the measuring head and the fixture. This detection device is used to detect the resistance value of the contact, and it sets the contact in the fixture and then detects the contact through the force gauge, but there are defects, which are mainly reflected in the fixture. The fixture can only clamp a single contact at a time, so that only one can be detected at a time, thereby reducing the detection efficiency. Utility Model Content

[0004] The utility model aims to provide a detection device for measuring the resistance value of a silver layer to solve the above problem.

[0005] In order to solve the above problems, the utility model provides a detection device for measuring the resistance value of a silver layer, comprising a detection platform, the detection platform is provided with a base and a guide column installed at the front end of the base, a resistance measuring instrument is movably connected to the guide column, a downwardly extending ejector pin is installed on the resistance measuring instrument, and the utility model is characterized in that a limit seat is installed on the base and is placed at the lower end of the resistance measuring instrument, a clamp which can move laterally and longitudinally is arranged in the limit seat, a clamp cavity is arranged in the clamp, and the clamp cavity can simultaneously accommodate a plurality of electrical contacts coated with a silver layer.

[0006] To be further improved, the clamp includes a front plate and a rear plate, and a group of protrusions spaced from left to right are arranged on the inner end surface of the front plate and the inner end surface of the rear plate, and a groove is formed between two adjacent protrusions. The protrusions arranged on the front plate and the protrusions arranged on the rear plate are staggered to the left and right, so that the protrusions arranged on the front plate are inserted into the grooves formed on the rear plate, and the protrusions arranged on the rear plate are inserted into the grooves formed on the front plate.

[0007] For further improvement, a terminal extending into the front splint is provided at the side end of the front splint, and shunt needles matching the number of the protrusions are provided on the terminal post. The shunt needles extend through the protrusions to the rear splint and contact the electrical contacts.

[0008] For further improvement, an insulating sticker is attached to the surface of the protrusion arranged on the front clamping plate, and the shunt needle passes through the insulating sticker.

[0009] For further improvement, the front end of the limit seat is provided with a limit plate for limiting the clamp to be in the detection position, and the rear end is provided with a mounting plate. A threaded hole is provided at the center position of the mounting plate, and an adjustable screw is provided in the threaded hole. One end of the screw is against the clamp and cooperates with the limit plate to generate a restraining force to prevent the clamp from moving.

[0010] For further improvement, the mounting plate is movably connected to two guide posts symmetrically distributed on both sides of the screw rod, a push plate is provided at one end of the guide post close to the clamp, and one end of the screw rod rests on the push plate.

[0011] The beneficial effects of the utility model are as follows: a plurality of electrical contacts to be tested can be clamped at the same time by using a special clamp, and the resistance values ​​of the silver layers of the plurality of electrical contacts to be tested can be quickly detected by moving the clamp left and right, thereby improving work efficiency; at the same time, the spacing of the clamp cavities is adjustable, and is suitable for silver layers of various thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a structural schematic diagram of a silver layer resistance value detection device.

[0013] Figure 2 It is a structural schematic diagram of the detection component fixture and the limit platform of the utility model.

[0014] Figure 3 It is a schematic diagram of the internal detection circuit structure of the front clamping plate of the utility model. DETAILED DESCRIPTION

[0015] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0016] In a typical implementation of the present application, Figure 1-3As shown, a detection device for measuring the resistance value of a silver layer includes a detection platform 30, the detection platform 30 is provided with a base 12 and a guide column 11 installed at the front end of the base 12, a resistance measuring instrument 8 is movably connected to the guide column 11, a downwardly extending ejector pin 7 is installed on the resistance measuring instrument 8, a limit seat 20 is installed on the base 12 and is placed at the lower end of the resistance measuring instrument 8, a clamp 10 that can move both laterally and longitudinally is arranged in the limit seat 20, a clamp cavity is arranged in the clamp 10, and the clamp cavity can accommodate multiple electric contacts coated with a silver layer at the same time. The principle of the utility model is that the clamp cavity forms multiple detection positions, and multiple electric contacts to be tested can be placed at the same time. When measuring, it is only necessary to adjust the position of the clamp 10 to the left and right so that the electric contacts at different positions are respectively in contact with the ejector pin 7 of the resistance measuring instrument 8, which greatly improves the work efficiency of the detection.

[0017] The clamp 10 includes a front plate 1 and a rear plate 2. A group of protrusions 101 are arranged on the inner end surfaces of the front plate 1 and the rear plate 2, and are spaced from left to right, and a groove 201 is formed between two adjacent protrusions 101. The protrusions 101 arranged on the front plate 1 and the protrusions 101 arranged on the rear plate 2 are staggered left and right, so that the protrusions 101 arranged on the front plate 1 are inserted into the grooves 201 formed on the rear plate 2, and the protrusions 101 arranged on the rear plate 2 are inserted into the grooves 201 formed on the front plate 1. The setting makes the clamp cavity present a corrugated configuration with crests and troughs, so that the position of the crest or trough can be used as the position for setting the electric contact, and the pin 7 of the resistance measuring instrument 8 matches the position of the crest or trough, so that the position of the electric contact in the clamp 10 can be quickly determined, and the cooperation of the protrusion 101 and the groove 201 can also be used as a positioning structure, which can quickly realize the combination of the clamp 10, and when the rear clamp plate 2 is moved to increase the width of the clamp cavity, the position of the rear clamp plate 2 will not be shifted, so that the replacement of the electric contact can be quickly completed.

[0018] The side end of the front splint 1 is provided with a terminal 102 extending into the front splint 1, and the terminal 102 is provided with shunt needles 103 whose number matches the bump 101. The shunt needles 103 extend through the bump 101 to the rear splint 2 and contact the electrical contact. The terminal 102 is externally connected to a power line and is connected to the shunt needles 103. When performing testing, a passage is formed with the silver layer of the electrical contact to be tested and the ejector pin 7 of the resistance measuring instrument 8, so as to measure the resistance value of the silver layer of the electrical contact.

[0019] The surface of the protrusion 101 disposed on the front clamping plate 1 is attached with an insulating sticker 104 , and the shunt needle 103 passes through the insulating sticker 104 . The insulating sticker 104 can improve the accuracy of resistance measurement and reduce damage to the silver layer during the clamping process.

[0020] The front end of the limit seat 20 is provided with a limit plate 3 for limiting the clamp 10 in the detection position, and the rear end is provided with a mounting plate 5. A threaded hole 501 is provided at the center position of the mounting plate 5, and an adjustable screw 6 is provided in the threaded hole 501. One end of the screw 6 is against the clamp 10 and cooperates with the limit plate 3 to generate a restraining force to prevent the clamp 10 from moving. The contact between the limit plate 3 and the front plate 1 of the clamp 10 can quickly limit the final detection position of the clamp 10 on the limit seat 20. The screw 6 adjusts its use length in the limit seat 20 by rotation, and also generates or releases the restraining force on the clamp 10 according to the change of the use length.

[0021] There are two guide columns 11 symmetrically distributed on both sides of the screw rod 6 and movably connected to the mounting plate 5. A push plate 4 is provided at one end of the guide column 11 close to the clamp 10. One end of the screw rod 6 rests on the push plate 4. There is a sufficient contact area between the push plate 4 and the clamp 10, so that the clamp 10 will not be offset when the clamp 10 is pushed to move. The guide column 11 is used to maintain the presentation state of the push plate 4 and can also increase the stability of the push plate 4 when moving.

[0022] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A detection device for measuring the resistance value of a silver layer, comprising a detection platform (30), the detection platform (30) being provided with a base (12) and a guide column (11) mounted on the front end of the base (12), a resistance measuring instrument (8) being movably connected to the guide column (11), and a downwardly extending ejector pin (7) being mounted on the resistance measuring instrument (8), characterized in that: A limit seat (20) is mounted on the base (12) and is disposed at the lower end of the resistance measuring instrument (8). A clamp (10) that can move laterally and longitudinally is disposed in the limit seat (20). A clamp cavity is disposed in the clamp (10), and the clamp cavity can simultaneously accommodate a plurality of electrical contacts coated with a silver layer.

2. The detection device for measuring the resistance value of the silver layer according to claim 1, characterized in that: The clamp (10) comprises a front plate (1) and a rear plate (2); a group of protrusions (101) spaced from left to right are arranged on the inner end surface of the front plate (1) and the inner end surface of the rear plate (2), and a groove (201) is formed between two adjacent protrusions (101); the protrusions (101) arranged on the front plate (1) and the protrusions (101) arranged on the rear plate (2) are arranged in a left-right offset manner, so that the protrusions (101) arranged on the front plate (1) are inserted into the grooves (201) formed on the rear plate (2), and the protrusions (101) arranged on the rear plate (2) are inserted into the grooves (201) formed on the front plate (1).

3. The detection device for measuring the resistance value of the silver layer according to claim 2, characterized in that: The side end of the front clamping plate (1) is provided with a terminal (102) extending into the front clamping plate (1), and the terminal (102) is provided with shunt pins (103) whose number matches the number of the protrusions (101), and the shunt pins (103) pass through the protrusions (101) to extend toward the rear clamping plate (2) and contact the electrical contacts.

4. The detection device for measuring the resistance value of the silver layer according to claim 3, characterized in that: An insulating sticker (104) is attached to the surface of the protrusion (101) disposed on the front clamping plate (1), and the shunt needle (103) passes through the insulating sticker (104).

5. The detection device for measuring the resistance value of the silver layer according to claim 1, characterized in that: The front end of the limit seat (20) is provided with a limit plate (3) for limiting the clamp (10) to be in a detection position, and the rear end is provided with a mounting plate (5), a threaded hole (501) is provided at a central position of the mounting plate (5), an adjustable screw rod (6) is provided in the threaded hole (501), one end of the screw rod (6) abuts against the clamp (10) and cooperates with the limit plate (3) to generate a restraining force to prevent the clamp (10) from moving.

6. The detection device for measuring the resistance value of the silver layer according to claim 5, characterized in that: The mounting plate (5) is movably connected to two guide posts (11) symmetrically distributed on both sides of the screw rod (6); a push plate (4) is provided at one end of the guide post (11) close to the clamp (10), and one end of the screw rod (6) abuts against the push plate (4).

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