Resistance test fixture and resistance tester

Abstract

The utility model provides a resistance test fixture and a resistance tester, and the resistance test fixture comprises a pedestal, the pedestal is provided with a supporting member, the supporting member is connected with a mechanical arm, one end, facing the pedestal, of the mechanical arm is provided with a clamping mechanism, a spring is connected between the supporting member and the mechanical arm, and the clamping mechanism is connected with the supporting member. One end of the spring is connected to the side, close to the base, of the supporting piece, the other end of the spring is connected to the lower side, close to the clamping mechanism, of the mechanical arm, and the spring is in a tightened state all the time, so that the spring applies elastic force to the mechanical arm, and the mechanical arm has the tendency of pressing downwards towards the base all the time. According to the resistance test fixture provided by the invention, test result deviation caused by human factors during on-resistance change rate test can be improved, and the resistance test precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance detection, in particular to a resistance test fixture and a resistance tester. Background Art

[0002] At present, in the FCBGA carrier board and PCB industries, in order to strengthen the monitoring of the quality of copper plating, each company will design a ten-thousand-hole board pattern to test the resistance change rate after simulated reflow soldering of through-holes / blind holes, so as to ensure that the through-holes and blind holes of copper plating will not break or have micro-cracks after the product expands thermally in a high-temperature environment, affecting the conduction performance. Since it is necessary to manually test the resistance twice during the test process to finally calculate the resistance change rate, during the manual test process, if there is a difference in the force applied in the two tests, it will greatly affect the size of the test value, resulting in distortion of the finally calculated resistance change rate. Summary of the Utility Model

[0003] In order to overcome the defects in the prior art, the embodiments of the utility model provide a resistance test fixture and a resistance tester, which can improve the deviation of the test results caused by human factors when testing the resistance and improve the accuracy of the resistance value test.

[0004] To achieve the above object, the technical solution adopted by the utility model is:

[0005] The first aspect of the utility model discloses a resistance test fixture, including: a base, a support member is provided on the base, a robotic arm is connected to the support member, a clamping mechanism is provided at one end of the robotic arm facing the base, a spring is connected between the support member and the robotic arm, one end of the spring is connected to the side of the support member close to the base, and the other end is connected to the lower side of the robotic arm close to the clamping mechanism. The spring is always in a taut state, so that the spring exerts an elastic force on the robotic arm, making the robotic arm always have a tendency to press down towards the base.

[0006] By setting a spring between the robotic arm and the support member in the above technical solution, since the spring is taut, when the spring returns to its deformed state, it exerts a mechanical force on the robotic arm and the support member, driving the robotic arm to press down. Since the position of the spring remains unchanged, the mechanical force exerted on the robotic arm and the support member remains unchanged. When measuring the resistance value, the change in the applied pressure borne by the resistance value is small, and the influence on the resistance value test result is small, which can improve the accuracy of the resistance value test.

[0007] Preferably, at least two support members are provided on the base, the at least two support members are spaced apart on the base, at least one robotic arm is connected to each support member, and at least one spring is connected between each support member and the robotic arm.

[0008] Preferably, when the robotic arm is flush with the horizontal plane, the angle between the spring and the lower side of the robotic arm is 30 to 60°. By applying pressure to the robotic arm through the restoring elastic force of the spring to drive the robotic arm downward, when connecting the spring, the effect is better when the angle between the spring and the horizontal plane is 30 to 60°.

[0009] Preferably, a fixing member is further provided on the base. The fixing member includes a fixing post and fixing blocks. The fixing blocks are arranged at both ends of the fixing post. The fixing post and the fixing blocks form a bayonet, and the bayonet clamps the base to movably connect the fixing member and the base.

[0010] The fixing member is used to fix the sample with the resistance value to be measured. It is necessary to maintain the stability of the fixing member itself. The fixing blocks provided on the fixing member can be stuck on both sides of the base to stably fix the fixing member on the base to maintain the stability of the sample to be measured. At the same time, the fixing member is movably arranged on the base and can adjust the width between the two fixing members according to the sample size to adapt to samples with different sizes to be measured.

[0011] Preferably, at least two fixing members are provided on the base. The at least two fixing members are arranged in the same direction on the base and are arranged at intervals along the width direction or the length direction of the base. Arranging at least two fixing members on the base can maintain the stability of the sample with the resistance value to be measured, and the setting direction and the distance between the fixing members can be adjusted to adapt to samples with different sizes to be measured.

[0012] Preferably, a through hole is provided on the support member. The robotic arm passes through the through hole and is movably connected to the support member, so that the robotic arm moves along the length direction of the base. The robotic arm has a certain length and is movably connected to the support member at the same time, which can adapt to samples with different sizes to be measured. The setting is simple and the operation is flexible.

[0013] Preferably, the support member is rotatably connected to the base. When the support member is rotated, the support member drives the robotic arm to rotate along the width direction of the base, and the robotic arm rotates left and right with the through hole as the center, and the rotation angle is 0 to 180°. The support member is rotatably arranged on the base, which can adapt to samples with different sizes and different shapes to be measured and increase the resistance measurement range of the test fixture.

[0014] Preferably, the clamping mechanism is connected to the robotic arm through a pin shaft, and the pin shaft is rotatable to clamp or loosen the clamping structure. The clamping mechanism can clamp or loosen, which is convenient for setting the resistance test probe and adapting to resistance test probes with different sizes.

[0015] Preferably, the material of the base is an insulating material.

[0016] The second aspect of the present utility model discloses a resistance tester, which includes a low-resistance meter and a resistance value test probe, and also includes a resistance test fixture as disclosed in the first aspect. When in use, the resistance value test probe is connected to the low-resistance meter, the clamping mechanism clamps the resistance value test probe, the spring applies an elastic force to the robotic arm, causing the robotic arm to press downward towards the base, and the resistance value test probe contacts the sample with the resistance value to be measured to measure the resistance.

[0017] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0018] In this application, a taut spring is arranged between the support member and the robotic arm. By using the mechanical force exerted by the spring during its restoration of deformation to replace the manual pressure application method, the unstable factors of manual force application during resistance measurement are excluded from the test process, which can improve the deviation of test results caused by human factors during the test of the conduction resistance change rate and enhance the accuracy of resistance value measurement.

[0019] To make the above and other objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, provides a detailed description as follows. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic cross-sectional structure diagram of a resistance test fixture in this application;

[0022] Figure 2 is a schematic top view structure diagram of a resistance test fixture in this application;

[0023] Figure 3 is a schematic cross-sectional structure diagram of an overall resistance tester in this application.

[0024] The reference numerals of the above drawings: 1, base; 2, support member; 3, robotic arm; 4, clamping mechanism; 5, spring; 6, fixing member; 7, sample to be measured; 8, resistance value test probe; 9, low-resistance meter. Detailed Embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Additionally, the accompanying drawings of the present utility model are only for simple schematic illustration and are not drawn according to actual dimensions. This is stated in advance.

[0026] In the present utility model, it should be noted that the orientation or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "frontward", "backward", "between", "close to", "far from", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. It should also be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] It should be understandable that although terms such as "first", "second", "third", etc. may be used in this article to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another, or one signal from another. Additionally, the term "or" used in this article should, depending on the actual situation, possibly include any one or a combination of more of the related listed items.

[0028] See Figure 1 As shown, the embodiment of the present application provides a schematic cross-sectional structure diagram of a resistance test fixture, including a base 1, a support member 2, a robotic arm 3, and a spring 5. The support member 2 is disposed on the base 1, the robotic arm 3 is connected to the support member 2, and the spring 5 is connected between the support member 2 and the robotic arm 3 and is always in a taut state.

[0029] With the above structure, the resistance test fixture of the present application applies mechanical forces to the robotic arm and the support member when the spring returns to its deformed state. When measuring the resistance value, a pressure is applied to the sample to be measured, and the change in the applied pressure received by the resistance value is relatively small, having little impact on the resistance value test result, and can improve the accuracy of the resistance value test.

[0030] Specifically, as Figure 1 shown, the resistance test fixture includes a base 1. The base 1 is a carrier for setting other components. The base 1 is made of an insulating material to avoid affecting the resistance value test result during the test. In a possible embodiment, the base 1 is set as a cuboid structure.

[0031] like Figure 1 As shown, in a possible embodiment, two support members 2 are installed on the base 1, and the two support members 2 are spaced apart on both sides of the base 1. Each support member 2 is connected to a robotic arm 3, and the end of the robotic arm 3 facing the base 1 is connected to a clamping mechanism 4. The clamping mechanism 4 is used to clamp the resistance test probe 8 when measuring the resistance. In a possible embodiment, the clamping mechanism 4 and the robotic arm 3 are fixed by a pin shaft, and the pin shaft can be rotated to adjust the clamping mechanism 4 so that the clamping structure 4 clamps or releases the resistance test probe 8, thereby facilitating the resistance test.

[0032] In one possible embodiment, support member 2 is rotatably mounted on base 1 and is configured as a cylinder for easy rotation. A through-hole is defined in support member 2, and robotic arm 3 is disposed within the through-hole and movably connected to support member 2. Robotic arm 3 can move within the through-hole along the length of base 1 to adjust the length of robotic arm 3 extending inward from base 1 to accommodate samples of varying sizes.

[0033] In a possible embodiment, when the robotic arm 3 is inserted into the through hole, the robotic arm 3 can be fixed by a pin or a bolt. There are many fixing methods, which are not described in detail in this application.

[0034] like Figure 2 As shown, the present application provides a schematic diagram of the top structure of a resistance testing fixture. Since the two support members 2 are rotatably connected to the base 1, when different positions on the sample 7 to be tested need to be tested, the support member 2 can be rotated, and the support member 2 drives the robotic arm 3 to rotate left and right along the width direction of the base 1. When rotating, the robotic arm 3 rotates left and right with the through hole as the center of the circle, and the rotation angle is 0 to 180°.

[0035] A spring 5 is connected between the support member 2 and the robotic arm 3, and is always in a taut state. In one possible embodiment, one end of the spring 5 is connected to the end of the support member 2 near the base 1, and the other end is connected to the underside of the robotic arm 3 near the clamping mechanism 4. When connected, the spring 5 is always in a taut state, so that the spring 5 is always in a state of recovery, exerting a rebound force on the robotic arm 3 and the support member 2, so that the robotic arm 3 always tends to press downward toward the base 1.

[0036] When the spring 5 is connected between the support 2 and the robotic arm 3, the robotic arm 3 remains level with the horizontal plane, and the angle between the spring 5 and the horizontal plane is 30 to 60 degrees, which can keep the spring 5 in a taut state. The elastic tension of the spring is used to apply pressure to press the robotic arm 3 downward, driving the resistance test probe 8 to press down and contact the sample to be tested 7 to test the resistance.

[0037] In a possible embodiment, two fixing members 6 are further provided on the base 1. The fixing members 6 are used to fix the sample to be measured 7 to keep the sample to be measured 7 stable during the resistance value measurement process. The two fixing members 6 are arranged in the same direction on the base 1 and are arranged at intervals along the width direction or the length direction of the base 1 to adapt to samples to be measured 7 of different sizes. The fixing member 6 includes a fixing column and a fixing block. The fixing column is arranged on the base 1. According to the arrangement direction of the fixing member 6, the length of the fixing column is consistent with the length or width of the base 1. The fixing block is arranged at both ends of the fixing column. The fixing column and the fixing block form a bayonet, and the bayonet is used to clamp the base 1 to fix the fixing member 6 on the base 1. The fixing member 6 is movable, and the position of the fixing member 6 on the base can be adjusted according to samples to be measured 7 of different sizes, and the operation is simple.

[0038] In a possible embodiment, a pin shaft is connected to the fixing block, and the fixing member 6 is fixed on the base 1 through the pin shaft, which can further improve the stability.

[0039] In a possible embodiment, the support member 2, the robotic arm 3, the spring 5 and the fixing member 6 provided on the base 1 are all symmetric structures, which is convenient for measuring resistance and adjusting the position according to the size of the sample to be measured 7 during the test process. In other possible embodiments, the components provided on the base 1 may also be asymmetric, and can be specifically set according to the actual situation, and the present application will not be described in detail herein.

[0040] Referring to Figure 3 , the embodiment of the present application also provides a schematic diagram of the overall sectional structure of a resistance tester. As Figure 3 shown, two clamping mechanisms 4 respectively clamp a resistance value test probe 8, and the two resistance value test probes 8 are connected to a low-resistance meter 9. The method of using the resistance tester to test the resistance value is as follows: when the resistance value needs to be tested, the sample to be measured 7 is placed on the base 1, and the two fixing members 6 are moved to fix the sample to be measured 7. The two clamping mechanisms 4 clamp the two resistance value test probes 8, and the positions of the robotic arms 3 at both ends are adjusted so that the resistance value test probes 8 on the robotic arms 3 are all in the position of the resistance value to be measured. The human hand releases the robotic arms 3, so that the robotic arms 3 are pressed down towards the base 1 under the action of the spring 5, so that the resistance value test probes 8 are in contact with the sample to be measured 7, and the resistance value is tested.

[0041] It should be noted that at least two support members 2 can be provided on the base 1. At least one robotic arm 3 is connected to each support member 2, and at least one spring 5 is connected between each support member 2 and the robotic arm 3. The above embodiments of the present application are only described by taking two support members 2, two robotic arms 3 and two springs 5 provided on the base 1 as preferred examples, and do not limit the specific setting quantity. In other possible embodiments, the support member 2, the robotic arm 3, the spring 5 and the fixing member 6 can all be set according to the actual situation, and the present application will not be described in detail herein.

[0042] In this application, a tightened spring is arranged between the support member and the robotic arm. When the spring restores its deformation, the mechanical force exerted is used to replace the manual pressure application method by humans, excluding the unstable factors of the force applied by humans during the resistance measurement process. This can improve the deviation of the test results caused by human factors during the test of the change rate of the on-resistance and enhance the accuracy of the resistance measurement.

[0043] Specific embodiments are applied in the present utility model to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A resistance test fixture, characterized in that, Comprising: A base, on which a support is provided. A robotic arm is connected to the support. At one end of the robotic arm facing the base, a clamping mechanism is provided. A spring is connected between the support and the robotic arm. One end of the spring is connected to the side of the support close to the base, and the other end is connected to the lower side of the robotic arm close to the clamping mechanism. The spring is always in a taut state, applying an elastic force to the robotic arm, so that the robotic arm always has a tendency to press down towards the base. The clamping mechanism is connected to the robotic arm through a pin shaft, and the pin shaft is rotatable to make the clamping mechanism clamp or loosen.

2. The resistance test fixture according to claim 1, wherein At least two supports are provided on the base. The at least two supports are spaced apart on the base. At least one robotic arm is connected to each support, and at least one spring is connected between each support and the robotic arm.

3. The resistance testing fixture according to claim 1, characterized in that, When the robotic arm is flush with the horizontal plane, the included angle between the spring and the lower side of the robotic arm is 30 to 60°.

4. A resistance test fixture according to claim 1, characterized in that, A fixing member is further provided on the base. The fixing member includes a fixing column and a fixing block. The fixing block is provided at both ends of the fixing column. The fixing column and the fixing block form a bayonet, and the bayonet clamps the base to movably connect the fixing member and the base.

5. The resistance test fixture according to claim 4, wherein, At least two fixing members are provided on the base. The at least two fixing members are arranged in the same direction on the base and are spaced apart along the width direction or the length direction of the base.

6. The resistance testing fixture according to claim 1, wherein A through hole is formed in the support. The robotic arm passes through the through hole and is movably connected to the support, so that the robotic arm moves along the length direction of the base.

7. The resistance testing fixture according to claim 6, characterized in that, The support is rotatably connected to the base. When the support is rotated, the support drives the robotic arm to rotate along the width direction of the base, and the robotic arm rotates left and right with the through hole as the center, and the rotation angle is 0 to 180°.

8. A resistance test fixture according to claim 1, characterized in that, The material of the base is an insulating material.

9. A resistance tester, including a low-resistance meter and a resistance value test probe, is characterized in that It further includes a resistance test fixture according to any one of claims 1 to 8. When in use, the resistance value test probe is connected to the low resistance meter. The clamping mechanism clamps the resistance value test probe. The spring applies an elastic force to the robotic arm, so that the robotic arm presses down towards the base direction, and the resistance value test probe abuts against the sample with the resistance value to be measured to measure the resistance.

Images