Low resistance alloy resistance test fixture

Abstract

The utility model provides a kind of low resistance alloy resistance test fixture, it includes: bakelite base, push rod, two sliding covers, multiple nylon sliding blocks and test copper sheet.Bakelite base is equipped with positioning groove and sliding slot, push rod is slidably arranged in bakelite base, nylon sliding block is arranged in sliding slot, and clamping spring is arranged between the inner wall of sliding slot and nylon sliding block;Sliding cover is slidably arranged on bakelite base, and sliding cover is located at the opening position of sliding slot, and sliding cover is used to shield opening or avoid opening;Test copper sheet is in the form of sheet, and test copper sheet is equipped with contact part and main body, and wiring terminal is arranged at the connecting position of main body and nylon sliding block.The position of resistance to be measured is fixed by positioning groove and test copper sheet cooperation, and resistance can be avoided to jump during clamping process;Test copper sheet is in the form of sheet, and the width of power connection position is large, and the heat dissipation area is increased, the temperature rising amplitude during testing can be reduced, temperature interference test result is avoided, and test precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of alloy resistor production, and in particular to a low-resistance alloy resistor testing fixture. Background Technology

[0002] After a resistor is packaged, its resistance value needs to be tested to confirm that it matches its nominal value. During testing, the electrodes of the target resistor are connected to a testing instrument. After power is applied, the actual resistance value is calculated based on the input voltage and the measured actual current. Electronic modules in products such as mobile phones, smart bracelets, computers, and automobiles, which strive for thinner and lighter designs and have high motherboard integration, require small-sized components. Small-sized, low-resistance resistors are commonly used in these applications.

[0003] The resistors mentioned above are small in size, and the probe is prone to deflection when it comes into contact with the resistor. The deflection of the test point will interfere with the measurement of the resistance value. In addition, the test requires power, and the probe in the existing test instrument is prone to heat up due to the current. The resistor being measured is a low-resistance resistor, and the accuracy of the measured resistance value is large under temperature interference. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-resistance alloy resistance test fixture to avoid resistance deviation during the test process and to prevent probe heating from interfering with the test values.

[0005] The objective of this utility model is achieved through the following technical solution: A low-resistance alloy resistance test fixture includes: a bakelite base, a push rod, two sliding covers, multiple nylon sliders, and a test copper sheet disposed on the nylon sliders; The bakelite base is provided with a positioning groove and a sliding groove. The positioning groove is used to accommodate the resistor to be tested. The push rod is slidably disposed in the bakelite base. The nylon slider is disposed in the sliding groove. A clamping spring is provided between the inner wall of the sliding groove and the nylon slider. The push rod is used to drive the nylon slider away from the resistor to be tested, and the clamping spring is used to drive the nylon slider closer to the resistor to be tested. The sliding cover is slidably disposed on the bakelite base, the sliding cover is located at the opening of the slide groove, and the sliding cover is used to cover the opening or avoid the opening; The test copper sheet is thin and has a contact portion and a main body. The width of the main body is greater than the width of the contact portion. A wiring terminal is provided at the connection position between the main body and the nylon slider. The contact portion faces the positioning groove.

[0006] In one embodiment, the push rod has a guide surface, and the nylon slider has an inclined surface that matches the guide surface.

[0007] In one embodiment, the position on the contact portion that contacts the resistor to be measured is tapered.

[0008] In one embodiment, a limiting groove is formed on the bakelite base, the limiting groove is connected to the positioning groove, and the contact portion is fitted with the inner wall of the limiting groove.

[0009] In one embodiment, there are four nylon sliders, which are arranged in pairs, with the two pairs of nylon sliders distributed on both sides of the push rod.

[0010] In one embodiment, the bakelite base is provided with a limiting track that matches the sliding cover. The limiting track wraps around both ends of the sliding cover and is used to limit the sliding distance of the sliding cover.

[0011] In one embodiment, the push rod portion is exposed outside the bakelite base.

[0012] In one embodiment, a return spring is provided in the inner cavity of the bakelite base, and the return spring abuts against the push rod.

[0013] In one embodiment, a clearance portion is provided at the corner of the slide.

[0014] In one embodiment, the nylon slider is provided with a heat sink, and the main body is attached to the heat sink.

[0015] The above-mentioned low-resistance alloy resistance test fixture has the following beneficial effects: 1. The clamping spring provides elastic force to clamp the resistor under test from both sides. The positioning groove cooperates with the test copper sheet to fix the position of the resistor under test, which can prevent the resistor from jumping during the clamping process and is less likely to damage the external package of the resistor. 2. The test copper sheet is thin and has a wide contact area, which increases the heat dissipation area, reduces the temperature rise during the test, avoids temperature interference with the test results, and improves the test accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a low-resistance alloy resistance testing fixture; Figure 2This is a schematic diagram showing the fit between the nylon slider and the groove; Figure 3 A schematic diagram for testing the resistance to be measured by clamping a copper sheet; Figure 4 This is a schematic diagram showing the connection between the nylon slider and the push rod. Figure 5 This is a structural diagram of the bakelite base.

[0018] Reference numerals: 10, Low-resistance alloy resistance test fixture; 20, Resistor to be tested; 100, Bakelite base; 110, Positioning groove; 120, Slide groove; 121, Clearance part; 130, Limiting groove; 140, Limiting track; 200, Push rod; 210, Guide surface; 300, Sliding cover; 400, Nylon slider; 410, Inclined surface; 420, Heat sink; 500, Test copper sheet; 510, Contact part; 520, Main body; 521, Terminal block; 610, Clamping spring; 620, Return spring. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figure 1 This utility model provides a low-resistance alloy resistance test fixture 10, which includes: a bakelite base 100, a push rod 200, two sliding covers 300, multiple nylon sliders 400, and a test copper sheet 500 disposed on the nylon sliders 400.

[0023] Please see Figure 4 and Figure 5 The bakelite base 100 is provided with a positioning groove 110 and a sliding groove 120. The positioning groove 110 is used to accommodate the resistor to be tested 20. The push rod 200 is slidably disposed in the bakelite base 100. The nylon slider 400 is disposed in the sliding groove 120. A clamping spring 610 is provided between the inner wall of the sliding groove 120 and the nylon slider 400. The push rod 200 is used to drive the nylon slider 400 away from the resistor to be tested 20, and the clamping spring 610 is used to drive the nylon slider 400 closer to the resistor to be tested 20. Please see Figure 2 and Figure 3 The sliding cover 300 is slidably mounted on the bakelite base 100. The sliding cover 300 is located at the opening of the slide groove 120. The sliding cover 300 is used to block or avoid the opening. During the test, the sliding cover 300 blocks the opening and restricts the nylon slider 400 within the slide groove 120. When it is necessary to maintain or replace the accessories on the nylon slider 400, the sliding cover 300 can be moved away from the opening, and the nylon slider 400 and the accessories fixed on it can be directly removed together. This allows the nylon slider 400 and its accessories to be quickly disassembled, reducing the difficulty of maintenance.

[0024] Please see Figure 2 The test copper sheet 500 is thin and has a contact portion 510 and a main body 520. The width of the main body 520 is greater than the width of the contact portion 510. A terminal 521 is provided at the connection position between the main body 520 and the nylon slider 400. The contact portion 510 faces the positioning groove 110. Preferably, the position on the contact portion 510 that contacts the resistor 20 under test is tapered. The terminal 521 is electrically connected to the test instrument via a wire and is a energized part.

[0025] It should be noted that due to the thermal effect of electric current, the conductor heats up when current passes through a blocking conductor, and this heat can interfere with the resistance test results. In this application, the test copper sheet 500 is thin and has a larger area compared to existing probes. The temperature rise when current passes through it is lower, and the increased surface area in contact with air facilitates heat dissipation, which helps to improve the accuracy of the resistance test.

[0026] Please see Figure 2 Preferably, the nylon slider 400 is provided with a heat sink 420, and the main body 520 is attached to the heat sink 420. The heat sink 420 further improves the heat dissipation efficiency of the test copper sheet 500.

[0027] The working principle of the low-resistance alloy resistance testing fixture 10 is as follows: Terminal 521 is electrically connected to the tester via a wire.

[0028] First, press the push rod 200, which will push open the nylon slider 400, allowing the test copper plates 500 on both sides to move away from each other and create space. Then, place the resistor to be tested 20 into the positioning groove 110. After releasing the push rod 200, the nylon sliders 400 will move closer together under the action of the clamping spring 610 until the test copper plates 500 on them contact the resistor to be tested 20, and the elastic force provided by the clamping spring 610 fixes them in the positioning groove 110. At this point, power can be applied to detect the resistance value of the resistor to be tested 20. After the test is completed, press the push rod 200 again to release the test copper plates 500 from locking the resistor to be tested 20.

[0029] When testing resistors of other sizes, the nylon slider 400 needs to be replaced. Simply slide the cover 300 to open the opening of the groove 120, and the nylon slider 400 can be removed. The test copper piece 500 fixed on the nylon slider 400 is also removed. After replacing the test copper piece 500 and the nylon slider 400, slide the cover 300 to cover the opening of the groove 120 to complete the assembly. The assembly and disassembly process is convenient.

[0030] Please see Figure 4 In one embodiment, the push rod 200 is provided with a guide surface 210, and the nylon slider 400 is provided with an inclined surface 410 that matches the guide surface 210. The guide surface 210 and the inclined surface 410 cooperate to guide the nylon slider 400 to slide. There are four nylon sliders 400, which are arranged in pairs, and the two pairs of nylon sliders 400 are distributed on both sides of the push rod 200. When the push rod 200 is pushed, the guide surface 210 and the inclined surface 410 cooperate to push the nylon sliders 400 on both sides apart, so that the test copper plates 500 on both sides of the positioning groove 110 are separated to provide space for clamping the resistor to be tested.

[0031] Please see Figure 2 and Figure 5 In one embodiment, a limiting groove 130 is provided on the bakelite base 100. The limiting groove 130 is connected to the positioning groove 110. The contact part 510 is in contact with the inner wall of the limiting groove 130. The limiting groove 130 guides the movement trajectory of the contact part 510, so that the contact part 510 slides stably.

[0032] Please see Figure 5 In one embodiment, the bakelite base 100 is provided with a limiting track 140 that matches the sliding cover 300. The limiting track 140 wraps around both ends of the sliding cover 300 and is used to limit the sliding distance of the sliding cover 300.

[0033] Please see Figure 1 and Figure 3In one embodiment, the push rod 200 is partially exposed outside the bakelite base 100. When clamping the resistor to be tested 20, simply pressing the exposed part of the push rod 200 moves the test copper plate 500, making operation simple. A return spring 620 is provided in the inner cavity of the bakelite base 100, and the return spring 620 abuts against the push rod 200. After releasing the push rod 200, the return spring 620 automatically drives the push rod 200 to return to its original position, eliminating the need for the operator to pull it out, which simplifies the testing process.

[0034] Please see Figure 5 In one embodiment, a clearance part 121 is provided at the corner position of the slide 120 to prevent the nylon slider 400 from getting stuck during the sliding process.

[0035] The aforementioned low-resistance alloy resistance test fixture 10 has the following beneficial effects: 1. The clamping spring 610 provides elastic force so that the test copper sheet 500 clamps the resistor under test 20 from both sides. The positioning groove 110 cooperates with the test copper sheet 500 to fix the position of the resistor under test 20, which can prevent the resistor from jumping during the clamping process and is less likely to damage the external package of the resistor. 2. The 500 copper sheet used for testing is thin and has a wide contact area, which increases the heat dissipation area, reduces the temperature rise during testing, avoids temperature interference with test results, and improves test accuracy.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A low-resistance alloy resistance testing fixture, characterized in that, include: Bakelite base, push rod, two sliding covers, multiple nylon sliders, and test copper sheet disposed on the nylon sliders; The bakelite base is provided with a positioning groove and a sliding groove. The positioning groove is used to accommodate the resistor to be tested. The push rod is slidably disposed in the bakelite base. The nylon slider is disposed in the sliding groove. A clamping spring is provided between the inner wall of the sliding groove and the nylon slider. The push rod is used to drive the nylon slider away from the resistor to be tested, and the clamping spring is used to drive the nylon slider closer to the resistor to be tested. The sliding cover is slidably disposed on the bakelite base, the sliding cover is located at the opening of the slide groove, and the sliding cover is used to cover the opening or avoid the opening; The test copper sheet is thin and has a contact portion and a main body. The width of the main body is greater than the width of the contact portion. A wiring terminal is provided at the connection position between the main body and the nylon slider. The contact portion faces the positioning groove.

2. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The push rod is provided with a guide surface, and the nylon slider is provided with an inclined surface that matches the guide surface.

3. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The contact portion that contacts the resistor under test is tapered.

4. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The bakelite base has a limiting groove, which is connected to the positioning groove, and the contact part is in contact with the inner wall of the limiting groove.

5. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The nylon slider is provided in four groups of two, with the two groups of nylon sliders distributed on both sides of the push rod.

6. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The bakelite base is provided with a limiting track that matches the sliding cover. The limiting track wraps around both ends of the sliding cover and is used to limit the sliding distance of the sliding cover.

7. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The push rod portion is exposed outside the bakelite base.

8. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, A return spring is provided in the inner cavity of the bakelite base, and the return spring abuts against the push rod.

9. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The chute is provided with a clearance section at the corner.

10. The low-resistance alloy resistance testing fixture according to claim 1, characterized in that, The nylon slider is provided with a heat sink, and the main body is attached to the heat sink.

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