Surface resistance tester

Abstract

The utility model relates to the technical field of laboratory test equipment, in particular to a surface resistance tester, which comprises a base, an objective table, a linear driving source, a pressing block, a control test component, a connecting wire and a switch key, according to the utility model, the control test component and the objective table are integrated on the base, and the connecting line between the electrode plate and the control test component can be hidden at the rear side of the control test component and is positioned in the base, so that the equipment is ensured to be beautiful, and the connecting line is not messy; during use, a worker flatly puts a to-be-tested spline on the objective table and then presses the switch key, the switch key transmits a signal to the control test component to control the linear driving source to drive the pressing block to descend, the electrode strip abuts against or slightly crimps the upper surface of the spline, the problem of poor contact caused by rough surface of the spline is avoided, and the test accuracy is improved. The operation of the whole equipment is controlled through one switch key, the pressing block and the resistance testing equipment do not need to be operated in sequence, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory testing equipment, in particular to a surface resistance tester. Background Art

[0002] A surface resistance tester is an instrument for testing the surface resistance of an object. It is mostly used in the fields of microelectronics, medicine, aerospace, precision machinery, etc. At present, in order to accurately measure the surface resistance of a sample with a high surface roughness, two spaced electrode strips are usually set on the loading platform. A pressure block that can move up and down is set above the loading platform. The electrode strip is connected to an external resistance testing device through a connecting wire. When in use, the pressure block is lowered to make the sample close to the electrode strip, and then the resistance testing device is turned on to wait for the data results. This method has the following problems: 1. The resistance testing device and the loading platform are designed separately, resulting in the connection line between the electrode strip and the resistance testing device being exposed, affecting the appearance of the laboratory; 2. When in use, the switch for operating the lifting of the pressure block and the on-off switch of the resistance testing device need to be operated separately, and they also need to be closed separately after use, which is cumbersome to operate. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a surface resistance tester, comprising:

[0004] Pedestal;

[0005] A stage, fixedly mounted on the base;

[0006] A linear drive source is vertically mounted downward on the upper end of the base;

[0007] A pressing block, fixedly mounted at the lower end of the pressing block, wherein the lower end surface of the pressing block is provided with two spaced-apart electrode strips;

[0008] A control test component is fixedly mounted on the upper end of the base, and the linear drive source is connected to the control test component;

[0009] A connecting wire, arranged at the rear end of the control test component, one end of which is connected to the electrode strip, and the other end of which passes through the upper end of the pressing block and is connected to the control test component;

[0010] A switch button is arranged on the base, and the switch button is connected to the control test component. In some possible embodiments, a positioning groove for accommodating the spline is arranged on the stage, and the groove depth of the positioning groove is less than the thickness of the spline.

[0011] In some possible embodiments, at least one vertical guide rod is further provided on the base, the output end of the linear drive source is connected to a movable plate, the vertical guide rod passes through the movable plate, and the pressure block is fixedly installed at the lower end of the movable plate.

[0012] In some possible embodiments, the electrode strip is adhered and fixed to the lower end surface of the pressing block.

[0013] In some possible embodiments, the electrode strip is a spring structure, and one end of the electrode strip is bent and passes vertically upward from the lower end surface of the pressing block.

[0014] In some possible embodiments, a pressure switch is further provided on the lower end surface of the pressing block, the pressure switch is located on a side of the electrode strip away from the sample strip, and the pressure switch is connected to the control test component.

[0015] In some possible embodiments, the connecting wire is a spring wire.

[0016] In some possible embodiments, the control test component includes a face shell, and also includes a control component and a test display component installed on the face shell, the switch button and the linear drive source are both connected to the control component, and the pressure switch is connected to the test display component.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The surface resistance tester of the utility model integrates the control test component and the stage on the base to make it an integral device, and the connecting wire between the electrode sheet and the control test component can be hidden behind the control test component and located inside the base, ensuring the beauty of the device and the tidy connection wire; and the control test component is installed on the upper end of the base, and the electrode sheet is arranged on the pressing block located on the upper end of the base, which can reduce the length of the connection wire;

[0019] 2. The surface test resistance tester of the utility model can control the operation of the entire device through a switch button, and there is no need to operate the pressure block and the resistance test device in sequence, which is easy to operate; the switch button of the present application can have a variety of logics to control the entire device, such as setting the opening and closing of the linear drive source and the opening and closing of the control test component on one switch, and operating the switch can simultaneously operate the opening and closing of the linear drive source and the control test component, and for example, when the pre-descent stroke of the linear drive source is set in the control test component, the switch button controls the opening and closing of the linear drive source, and when the linear drive source drives the pressure block to move to a stroke equal to the pre-descent stroke, the control test component automatically opens. The above two logic controls are only conventional operating methods, and more innovative structures and methods will be listed in the specific implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a three-dimensional structural diagram of the surface resistance tester of the embodiment of the utility model at a first angle;

[0022] Figure 2 It is a three-dimensional structural diagram of the surface resistance tester of the embodiment of the utility model at a second angle;

[0023] Figure 3 It is a structural cross-sectional view of the pressing block part of an embodiment of the utility model.

[0024] Description of the accompanying drawings: base 10, stage 11, positioning groove 111, linear drive source 12, pressure block 13, pressure switch 131, electrode strip 14, control test component 15, connecting line 16, switch button 17, vertical guide rod 18, moving plate 19. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] Reference Figure 1 and Figure 2The surface resistance tester shown in the figure comprises a base 10, on which a stage 11 is fixedly mounted, a sample to be tested can be placed flat on the upper end surface of the stage 11, a linear driving source 12 is arranged vertically downward above the stage 11, an output end of the linear driving source 12 is connected to a pressing block 13, and two spaced electrode strips 14 are arranged on the lower end surface of the pressing block 13, and a control test component 15 is also arranged at the upper end of the base 10. The control test component 15 of this embodiment integrates conventional resistance test equipment in the industry and a control test component for controlling the resistance test. The control component for controlling the opening and closing of the linear drive source 12 can be specifically a resistance test device and a control component installed in a shell, wherein the resistance test device and the control component do not need to be connected, thereby reducing the complexity of the improvement of the present application. A connecting wire 16 is arranged between the electrode strip 14 and the control test component 15, and the connecting wire 16 is located at the rear end of the control test component 15. One end of the connecting wire 16 is connected to the electrode strip 14, and the other end passes through the upper end of the pressing block 13 and is connected to the control test component 15. When viewed from the front of the tester, the connecting wire 16 is hidden behind the control test component 15 to maintain the beauty of the device. It should be noted that the electrode strip 14 is lifted and lowered with the pressing block 13 during operation. To ensure that the connecting wire 16 is not pulled and broken, the length of the connecting wire 16 should be greater than the distance between the connecting port of the control test component 15 and the upper end surface of the pressing block 13. A switch button 17 is also arranged on the base 10, and the switch button 17 is connected to the control test component 15. In this embodiment, there can be multiple control logics for the switch button 17, and two conventional logics can be listed here: 1. The linear drive source The opening and closing of 12 and the opening and closing of the control test component 15 are both set on a switch. By operating the switch, the opening and closing of the linear drive source 12 and the control test component 15 can be operated at the same time. 2. The pre-descending stroke of the linear drive source 12 is set in the control test component 15, and the switch button 17 controls the opening and closing of the linear drive source 12. When the linear drive source 12 drives the moving stroke of the pressure block 13 to be equal to the pre-descending stroke, the control test component 15 is automatically opened; further, the switch button 17 is set on the control test component 15 to facilitate the operation of the staff.

[0027] The working process of the utility model is: the staff puts the sample to be tested flat on the stage 11 and presses the switch button 17, and the switch button 17 transmits the signal to the control test component 15 to control the linear drive source 12 to drive the pressing block 13 to descend, so that the pressing block 13 / electrode strip 14 can abut or slightly press the upper surface of the sample, thereby avoiding the problem of poor contact caused by the rough surface of the sample.

[0028] In some possible embodiments, a positioning groove 111 for accommodating the spline is provided on the stage 11, and the groove depth of the positioning groove 111 is less than the thickness of the spline, ensuring that the upper surface of the spline is higher than the upper end surface of the stage 11, so that the electrode strip 14 can contact the upper surface of the spline.

[0029] In some possible embodiments, at least one vertical guide rod 18 is further provided on the base 10, the output end of the linear drive source 12 is connected to the movable plate 19, the vertical guide rod 18 passes through the movable plate 19, and the pressure block 13 is fixedly installed on the lower end of the movable plate 19. This embodiment is illustrated by taking the two vertical guide rods 18 symmetrically arranged at the opposite ends of the movable plate 19 as an example. The vertical guide rods 18 can guide the stability of the lifting and lowering of the movable plate 19 to ensure that the two electrode heads can abut or slightly press the spline. At the same time, when the pressure block 13 is away from the stage 11, the loose connecting wire 16 can also be placed on the movable plate 19 to avoid its exposure and affecting the appearance.

[0030] In some possible embodiments, the electrode strip 14 is adhered and fixed to the lower end surface of the pressing block 13, and the lower surface of the electrode strip 14 can be flush with the lower end surface of the pressing block 13 or protrude from the lower end surface of the pressing block 13 to ensure that the electrode strip 14 can stably contact / pressed to the spline.

[0031] In some possible embodiments, the electrode strip 14 is a spring structure, one end of the electrode strip 14 is bent and passes vertically upward from the lower end surface of the pressing block 13, the passing end is connected to the resistance testing equipment through the connecting line 16, and the other end of the electrode strip 14 is a free end. The electrode strip 14 gradually contacts / crimps the spline as the pressing block 13 descends. In this embodiment, the electrode strip 14 is ensured to always contact the surface of the spline through the elastic restoring force of its own material.

[0032] In some possible embodiments, a pressure switch 131 is further provided on the lower end surface of the pressing block 13. The pressure switch 131 is located on the side of the electrode strip 14 away from the spline. The pressure switch 131 is connected to the control test component 15. Specifically, the pressure switch 131 is a switch of the resistance test device. When working, the pressing block 13 descends and causes the electrode strip 14 to press against the upper surface of the spline. At the same time, the pressure switch 131 is also subjected to a certain pressure. When the pressure on the pressure switch 131 reaches a threshold, a switch signal is output to the electronic test device, and the resistance test device can Start the resistance test. In this embodiment, the resistance test equipment can be turned on only after the electrode strip 14 is stably in contact / crimped with the spline. Power can be supplied between the two electrode strips 14. Compared with the existing method of supplying power to the two electrode strips 14 and then contacting them, this method can avoid arcing that may occur at the moment when the electrode strip 14 contacts the spline, thereby damaging the equipment / spline. It should be noted that the sensing end of the pressure switch 131 contacts the upper surface of the electrode strip 14, and the sensing end is insulated and shielded, such as a conventional design scheme in which the sensing end is covered with a silicone sleeve.

[0033] In some possible embodiments, the connecting wire 16 is a spring wire that can naturally retract in a relaxed state, thereby avoiding the problem that the connecting wire 16 is exposed or entangled at the output end of the linear drive source 12 .

[0034] In some possible embodiments, the control test component 15 includes a face shell, and also includes a control component and a test display component installed on the face shell. The test display component of this embodiment is a common resistance testing device in the industry, which usually has a display that can display the results. The control component can also adopt a conventional design in the industry, which usually includes a programmable controller. The switch button 17 and the linear drive source 12 are both connected to the control component. The staff presses the switch button 17 to control the opening and closing of the linear drive source 12 through the control component. The pressure switch 131 is connected to the test display component. The pressure switch 131 descends with the pressure block 13 and presses the spline to achieve conduction. The test display component is turned on and the resistance test is performed.

[0035] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A surface resistance tester, characterized in that: include: Base (10); A loading platform (11) is fixedly mounted on the base (10); A linear drive source (12) is mounted vertically downward on the upper end of the base (10); A pressing block (13) is fixedly mounted on the lower end of the pressing block (13), and the lower end surface of the pressing block (13) is provided with two spaced-apart electrode strips (14); A control test component (15) is fixedly mounted on the upper end of the base (10), and the linear drive source (12) is connected to the control test component (15); A connecting wire (16) is arranged at the rear end of the control test component (15), one end of which is connected to the electrode strip (14), and the other end of which passes through the upper end of the pressing block (13) and is connected to the control test component (15); A switch button (17) is arranged on the base (10), and the switch button (17) is connected to the control test component (15).

2. A surface resistance tester according to claim 1, characterized in that: The object carrier (11) is provided with a positioning groove (111) capable of accommodating the spline, and the groove depth of the positioning groove (111) is less than the thickness of the spline.

3. A surface resistance tester according to claim 1, characterized in that: At least one vertical guide rod (18) is also provided on the base (10), the output end of the linear drive source (12) is connected to a movable plate (19), the vertical guide rod (18) passes through the movable plate (19), and the pressing block (13) is fixedly mounted on the lower end of the movable plate (19).

4. A surface resistance tester according to claim 1, characterized in that: The electrode strip (14) is glued and fixed to the lower end surface of the pressing block (13).

5. A surface resistance tester according to claim 1, characterized in that: The electrode strip (14) is a spring sheet structure, and one end of the electrode strip (14) is bent and passes vertically upward from the lower end surface of the pressing block (13).

6. A surface resistance tester according to claim 1, characterized in that: The lower end surface of the pressing block (13) is also provided with a pressure switch (131), the pressure switch (131) is located on the side of the electrode strip (14) away from the sample strip, and the pressure switch (131) is connected to the control test component (15).

7. A surface resistance tester according to claim 1, characterized in that: The connecting wire (16) is a spring wire.

8. A surface resistance tester according to claim 6, characterized in that: The control test component (15) includes a housing, and also includes a control component and a test display component installed on the housing. The switch button (17) and the linear drive source (12) are both connected to the control component, and the pressure switch (131) is connected to the test display component.

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