A multi-mode finger rub experimental device

Abstract

The application discloses a multi-mode finger friction experiment device, which comprises a finger clamping device and a pressure sensor, the finger clamping device is used for fixing a finger, and the pressure sensor is used for placing a sample for a friction test, the finger clamping device is movably connected to an active friction guide rail, the pressure sensor is movably connected to a passive friction guide rail, the active friction guide rail and the passive friction guide rail are parallel to each other and are arranged along a horizontal direction, and the active friction guide rail is further movably connected to an adjusting guide rail in a vertical design. The application provides a multi-mode finger friction experiment device which can not only complete active friction and active static friction experiment measurement data, but also complete passive friction and passive static friction experiment measurement data.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of friction experiment, in particular to a multi-mode finger friction experiment device. BACKGROUND

[0002] Finger friction is an important research topic of biological tribology of body surface. In human life activities, finger contact friction behavior can be seen everywhere, such as operation of buttons, operation rods, touch operation of touch screens, unscrewing of bottle caps, use of keyboards, mouse and other actions. In these behaviors, the fingers will be in contact with various materials due to touch and sliding, which will produce friction and affect the fingers, causing deformation of the skin on the surface of the fingers, such as: finger and labor production tools, sports goods and other friction and blistering phenomena; comfort of finger and touch screen and other materials in contact with friction, etc. Therefore, it is necessary to test and study the rules of finger contact friction, i.e. the friction mechanics characteristics of fingers, so as to guide the design and manufacture of related products according to the measured friction mechanics characteristics of fingers, so as to improve the reliability and sensitivity of product operation, and improve the comfort and health of human finger operation.

[0003] In many finger friction experiment devices, the active friction and active static friction characteristics of fingers are mainly studied, such as the operation of buttons and unscrewing of bottle caps, while the passive friction and passive static friction characteristics of fingers are ignored, such as the passive static friction caused by the inertia of tools when performing hand tool work, and the passive friction when the tool is dropped. Active friction and active static friction can only evaluate the comfort of use, but cannot accurately evaluate the discomfort of passive friction and passive static friction when used. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a multi-mode finger friction experiment device which can not only complete the experimental measurement data of active friction and active static friction, but also complete the experimental measurement data of passive friction and passive static friction.

[0005] The technical scheme adopted by the present application to solve the above problems is: a multi-mode finger friction experiment device, comprising a finger clamping device and a pressure sensor, the finger clamping device is used to fix the finger, and the pressure sensor is used to place the sample for friction test, the finger clamping device is movably connected to an active friction guide rail, the pressure sensor is movably connected to a passive friction guide rail, the active friction guide rail and the passive friction guide rail are parallel to each other and are arranged in the horizontal direction, and the active friction guide rail is further movably connected to an adjusting guide rail designed vertically; when the finger clamping device is fixed and the pressure sensor is moved, the passive friction reaction of the finger is observed; when the finger clamping device is moved and the pressure sensor is fixed, the active friction reaction of the finger is observed; and the distance between the active friction guide rail and the passive friction guide rail is used to control the pressing force between the finger and the sample.

[0006] Compared with the prior art, the present application has the advantages that before the experiment, the finger is placed in the finger clamping device, and the sample to be tested is placed on the pressure sensor, the distance between the active friction guide rail and the passive friction guide rail is adjusted according to the finger of the experimenter, so that the finger is in contact with the sample; when active friction experiment is needed, the pressure sensor is stationary on the passive friction guide rail, and the finger clamping device is moved on the active friction guide rail, so that the finger performs active friction on the sample, and the active friction characteristics of the finger on the sample are obtained; when active static friction experiment is needed, the pressure sensor is in a free state, and the finger clamping device is moved on the active friction guide rail, so that the finger drives the pressure sensor and the sample to move together, so that the finger performs active static friction on the sample, and the active static friction characteristics of the finger on the sample are obtained; when passive friction experiment is needed, the finger clamping device is stationary on the active friction guide rail, and the pressure sensor is moved on the passive friction guide rail or the pressure sensor is rotated, so that the sample performs active friction on the finger, that is, the finger performs passive friction, and the passive friction characteristics of the finger on the sample are obtained; when passive static friction experiment is needed, the finger clamping device is in a free state, and the pressure sensor is moved on the passive friction guide rail, so that the sample drives the finger clamping device and the finger to move together, so that the sample performs active static friction on the finger, that is, the finger performs passive static friction, and the passive static friction characteristics of the finger on the sample are obtained. Therefore, through the design of the present application, four kinds of finger friction experiment can be performed, and the experimental data is more comprehensive and accurate compared with the traditional experimental device. At the same time, the distance between the active friction guide rail and the passive friction guide rail can be used to adjust the pressure between the finger and the sample, so as to obtain friction experimental data under different pressures.

[0007] As an improvement of the present application, the finger clamping device comprises two clamping finger plates, the two clamping finger plates are provided with clamping finger holes for preventing finger retraction, the two clamping finger plates are arranged in parallel, and the two clamping finger holes are coaxially arranged. Through the improvement, during the finger rubbing experiment, the finger will perform the subconscious behavior of self-protection, such as retraction, bending and the like. Through the design of the clamping finger hole, the finger can be fixed on the clamping finger plate, the subconscious retraction of the finger is avoided, the contact force and the contact area between the finger and the sample are ensured, and the two coaxially arranged clamping finger holes can ensure that the finger is in a straight state on the clamping finger plate, avoid the subconscious bending of the finger during the experiment and the stress bending during the rubbing process, and thus the accuracy of the experiment is ensured.

[0008] As an improvement of the present application, the finger clamping device further comprises a connecting plate and a rotating plate, the connecting plate is movably connected to the driving friction guide rail, one side of the rotating plate is adjustably connected to the connecting plate, and the other side of the rotating plate is used for fixedly connecting the two clamping finger plates. Through the improvement, during the finger rubbing experiment, the placement angle of the finger is also one of important variable parameters. The normal force between the finger and the sample will be different at different finger contact angles, so that the friction characteristics of the finger will change. Therefore, through the design of the rotating plate, the experimental angle of the finger can be adjusted during each experiment, different experimental data can be obtained, and the comprehensiveness and accuracy of the experimental data are ensured.

[0009] As an improvement of the present application, the connecting portion of the connecting plate and the rotating plate is provided with positioning holes which are uniformly arranged along the circumference of the rotating plate, the rotating plate is provided with positioning shafts matched with the positioning holes, and the connecting portion of the connecting plate and the rotating plate is further provided with fixing bolts for fixing the two. Through the improvement, when the finger can perform experiments at different angles, the experimental angle of the rotating plate each time can be determined, the deviation of the experimental angle of the rotating plate is avoided, the systematic error of the experiment is reduced, and the experimental data is more accurate.

[0010] As an improvement of the present application, the rotating plate is arranged at one end of the connecting plate, and a supporting part for supporting the arm is further arranged on the connecting plate, the supporting part is arranged at the bottom end of the connecting plate and extends to the other end of the connecting plate along the rotating plate, through the improvement, the supporting part is used for supporting the arm, and in the friction process, the arm is prone to experimental fatigue, although the experimental data are not affected due to the design of the clamping finger plate, but the experimenter is too tired, which is not conducive to the long-term and effective experiment, thereby greatly reducing the experimental volume and the experimental efficiency, and through the design of the supporting part, the fatigue of the experimenter can be reduced, the experimental volume and the experimental efficiency are improved, and meanwhile, the design of the supporting part can make the finger experimental action of the experimenter more smooth, and in the experiment, the arm can be moved together to avoid the wrist joint and the finger joint sprain in the finger friction experiment, so that the experimenter is more relaxed, and meanwhile, the experimenter can keep the arm in a relaxed state in the experiment, avoid tension, reduce the subconscious resistance behavior of the experimenter, reduce the human interference factor, and ensure the accuracy of the experiment.

[0011] As an improvement of the present application, the active friction guide rail is provided with a limiting probe, and the connecting plate is provided with a limiting sheet, when the limiting sheet reaches the position of the limiting probe, the connecting plate stops moving, through the improvement, the stroke of the friction experiment can be avoided to be too large, and the movement stroke of the arm of the experimenter is avoided to be exceeded, so that the experimenter is avoided to be hurt.

[0012] As an improvement of the present application, the clamping finger hole is provided with a clamping finger air bag in the circumferential direction, through the improvement, when the finger is clamped by the clamping finger hole, because the thicknesses of different fingers are different, the thicknesses of the front end and the tail end of the same finger are different, and the thicknesses of the fingers of different experimenters are also different, so that the clamping work of all fingers cannot be performed by using the clamping finger hole with a fixed hole diameter, and meanwhile, the hard clamping mode also causes the clamping damage to the experimenter in the experiment, which is not conducive to the protection of the body safety of the experimenter, and through the design scheme of the clamping finger air bag, the coaxiality of the finger clamping and the clamping damage to the experimenter can be avoided, the clamping force can be adjusted by controlling the air pressure of the clamping finger air bag, the clamping is avoided to be not firm for the person with thin fingers, and the clamping is avoided to be too tight for the person with thick fingers, the clamping not firm is easy to cause the finger deviation in the experiment process, and form the experimental error, and the clamping too tight causes the blood flow of the finger of the experimenter to be not smooth in the experiment process, and the long-term experiment cannot be performed.

[0013] As an improvement of the application, the middle part of the active friction guide rail is movably connected to the adjusting guide rail, the two ends of the active friction guide rail are movably connected to the two balance guide rails respectively, one side of the adjusting guide rail is provided with a height scale, the active friction guide rail is provided with an indicating arrow, the adjusting guide rail comprises an adjusting screw, the active friction guide rail is movably connected to the adjusting screw through a connecting block, and the top end of the adjusting screw is provided with a screw micrometer, through the improvement, the design of the two balance guide rails can ensure the horizontal arrangement of the active friction guide rail and the stability of the movement of the active friction guide rail, the height scale can be used to quickly position the height of the active friction guide rail during the accurate experimental stage, and the height scale is convenient for reading the experimental height during the experiment, and the screw micrometer is manufactured by adopting the principle similar to that of a screw micrometer, the active friction guide rail moves 1mm downward or upward when the screw micrometer rotates one round, a large number of scale lines are arranged on the screw micrometer to ensure the high accuracy of adjustment, compared with the thickness of the skin surface, 1mm is a relatively large stroke, and the thickness of the finger deformation caused by extrusion is determined according to the body shape of the experimenter, which is also less than 5mm in the conventional state, so the precision requirement of the finger friction experiment is very high, and high-precision experimental parameter adjustment is required to make accurate experimental data judgment.

[0014] As an improvement of the application, the adjusting screw is further connected with a lock catch, and the lock catch is used for fixing the adjusting screw, through the improvement, because the active friction guide rail moves along the vertical direction, the adjusting screw needs to be responsible for the support of the active friction guide rail, that is, the active friction guide rail has a downward movement tendency due to gravity, after the height adjustment of the active friction guide rail is completed, the adjusting screw needs to be fixed by the lock catch to avoid the downward deviation of the active friction guide rail.

[0015] As an improvement of the application, the top of the pressure sensor is provided with a tray, the upper end face of the tray is provided with a camera hole, and a camera is arranged in the camera hole, through the improvement, in the conventional finger friction experiment process, the finger state can only be observed from the side and obliquely above during the experiment, and the finger state after the experiment is observed after the experiment, and it is difficult to observe the finger contact surface of the finger in the friction experiment process in real time, and through the design of the tray and the camera, the friction state of the finger can be observed from below in the friction experiment of the transparent sample, so that more accurate finger friction experiment data can be obtained, such as the stress deformation state of the finger skin surface and the wear phenomenon of the finger skin surface. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the application.

[0017] Figure 2 Figure 3 is a cross-sectional view of the connecting structure of the rotating plate according to the present application.

[0018] Figure 3 Figure 4 is a schematic view of the partial connecting structure of the connecting plate according to the present application (without the rotating plate).

[0019] Figure 4 Figure 5 is a schematic view of the structure of the present application from another perspective.

[0020] Figure 5 Figure 6 is a schematic view of the internal connecting structure of the adjusting guide rail according to the present application.

[0021] Figure 6 Figure 7 is a cross-sectional view of the connecting structure of the pressure sensor according to the present application.

[0022] In the figure: 1, finger clamping device, 1.1, connecting plate, 1.1.1, positioning hole, 1.1.2, limiting piece, 1.2, rotating plate, 1.2.1, positioning shaft, 1.3, finger clamping plate, 1.3.1, finger clamping hole, 1.3.2, finger clamping air bag, 1.4, fixing bolt, 1.5, support part, 2, pressure sensor, 3, active friction guide rail, 3.1, limiting probe, 3.2, indicating arrow, 4, passive friction guide rail, 5, adjusting guide rail, 5.1, height scale, 5.2, adjusting screw, 5.3, connecting block, 5.4, screw micrometer, 5.5, lock catch, 6, balancing guide rail, 7, tray, 7.1, camera hole, 8, camera, 9, sample, 10, motor. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be further described below with reference to the accompanying drawings.

[0024] As Figure 1As shown, a multi-mode finger rubbing experiment device includes a finger clamping device 1 for fixing a finger and a pressure sensor 2 for placing a sample 9 for rubbing test, the finger clamping device 1 is movably connected to an active rubbing guide rail 3, the pressure sensor 2 is movably connected to a passive rubbing guide rail 4, the active rubbing guide rail 3 and the passive rubbing guide rail 4 are parallel to each other and are arranged in a horizontal direction, and the active rubbing guide rail 3 is further movably connected to an adjusting guide rail 5 designed vertically; when the finger clamping device 1 is fixed and the pressure sensor 2 is moved, the passive rubbing reaction of the finger is observed; when the finger clamping device 1 is moved and the pressure sensor 2 is fixed, the active rubbing reaction of the finger is observed; the spacing between the active rubbing guide rail 3 and the passive rubbing guide rail 4 is used to control the pressing force between the finger and the sample 9, one side of the active rubbing guide rail 3 is provided with a motor 10 for driving the finger clamping device 1 to move on the active rubbing guide rail 3, one side of the passive rubbing guide rail 4 is provided with a motor 10 for driving the pressure sensor 2 to move on the passive rubbing guide rail 4, and a motor 10 is arranged below the pressure sensor 2 for driving the pressure sensor 2 to rotate.

[0025] As Figures 1-3As shown, the finger clamping device 1 comprises two clamping finger plates 1.3, two clamping finger holes 1.3.1 for preventing finger retraction are arranged on the two clamping finger plates 1.3, the two clamping finger plates 1.3 are arranged in parallel, and the two clamping finger holes 1.3.1 are coaxially arranged, the finger clamping device 1 further comprises a connecting plate 1.1 and a rotating plate 1.2, the connecting plate 1.1 is movably connected to the driving friction guide rail 3, one side of the rotating plate 1.2 is adjustably connected to the connecting plate 1.1 at a fixed angle, and the other side of the rotating plate 1.2 is used for fixedly connecting the two clamping finger plates 1.3, a plurality of positioning holes 1.1.1 are uniformly arranged on the connecting plate 1.1 along the circumferential direction of the rotating plate 1.2 at the connection between the connecting plate 1.1 and the rotating plate 1.2, a plurality of positioning shafts 1.2.1 are arranged on the rotating plate 1.2 and matched with the positioning holes 1.1.1, a plurality of fixing bolts 1.4 are arranged at the connection between the connecting plate 1.1 and the rotating plate 1.2 for fixing the two, the rotating plate 1.2 is arranged at one end of the connecting plate 1.1, a supporting portion 1.5 for supporting an arm is further arranged on the connecting plate 1.1, the supporting portion 1.5 is arranged at the bottom end of the connecting plate 1.1 and is arranged along the rotating plate 1.2 towards the other end of the connecting plate 1.1, a limiting probe 3.1 is arranged on the driving friction guide rail 3, a limiting sheet 1.1.2 is arranged on the connecting plate 1.1, when the limiting sheet 1.1.2 reaches the position of the limiting probe 3.1, the movement of the connecting plate 1.1 is stopped, a plurality of clamping finger air bags 1.3.2 are arranged along the circumferential direction of the clamping finger hole 1.3.1, when the clamping finger air bags 1.3.2 are inflated, the clamping finger air bags 1.3.2 apply the same force to the fingers in the circumferential direction, can automatically adjust the fingers to be located on the axis of the clamping finger hole 1.3.1, ensure the relative position relationship between the fingers and the sample 9, the clamping finger air bags 1.3.2 are connected with an external air pump through an air flow pipeline, a switch for adjusting the air pressure is arranged in the air flow pipeline, so that the clamping force of the clamping finger air bags 1.3.2 can be adjusted according to the finger condition of each experimenter, the fingers of the experimenter are fixed at the same time, the fingers are protected, the axial arrangement of the fingers in the clamping finger hole 1.3.1 is ensured, the appropriateness of the clamping of the clamping finger air bags 1.3.2 to the fingers is ensured, the experimental quality is ensured, and harm to the experimenter is avoided.

[0026] As Figures 4-5As shown, the middle of the active friction guide rail 3 is movably connected to the adjusting guide rail 5, and the two ends of the active friction guide rail 3 are movably connected to two balance guide rails 6 respectively, one side of the adjusting guide rail 5 is provided with a height scale 5.1, the active friction guide rail 3 is provided with an indicating arrow 3.2, the adjusting guide rail 5 comprises an adjusting screw 5.2, the active friction guide rail 3 is movably connected to the adjusting screw 5.2 through a connecting block 5.3, the top end of the adjusting screw 5.2 is provided with a screw micrometer 5.4, the screw micrometer 5.4 is designed by using the principle similar to that of a screw micrometer, and the active friction guide rail 3 moves 1mm downward or upward when the screw micrometer 5.4 rotates one turn, a large number of scale lines are arranged on the screw micrometer 5.4 to ensure the high accuracy of adjustment, compared with the thickness of the skin surface, 1mm is a relatively large stroke, and the thickness of the finger deformation is determined according to the body type of the experimenter, which is also less than 5mm in the conventional state, so the precision requirement of the finger rubbing experiment is very high, and high-precision experimental parameter adjustment is required to make accurate experimental data judgment, the adjusting screw 5.2 is further connected to a lock catch 5.5, the lock catch 5.5 is used to fix the adjusting screw 5.2, and the lock catch 5.5 comprises two clamping blocks and a control switch, the control switch is used to control the two clamping blocks to move away from or close to each other, when the two clamping blocks move close to each other, the two clamping blocks fix the adjusting screw 5.2, and when the two clamping blocks move away from each other, the adjusting screw 5.2 can rotate.

[0027] As shown in Figure 1 , Figure 6 , the upper end of the pressure sensor 2 is square, the lower end surface of the tray 7 is sleeved on the pressure sensor 2, no matter whether the pressure sensor 2 moves or rotates, the synchronism between the tray 7 and the pressure sensor 2 can be ensured, the upper end surface of the tray 7 is also square, and the sample 9 is placed on the tray 7, so that the synchronism between the sample 9 and the tray 7 can be ensured. When the sample 9 is a transparent material, the camera 8 can timely feedback the rubbing state of the finger, such as the deformation degree of the finger and the wear condition of the finger, and through the design of the finger clamping air bag 1.3.2, the contact position between the finger and the sample can be ensured to be directly above the camera 8.

[0028] Before the experiment, the finger is placed in the finger clamping device 1, the sample 9 to be tested is placed on the pressure sensor 2, the distance between the active friction guide rail 3 and the passive friction guide rail 4 is adjusted according to the finger of the experimenter, the finger is abutted against the sample 9; when the active friction experiment is needed, the pressure sensor 2 is stationary on the passive friction guide rail 4, and the finger clamping device 1 is moved on the active friction guide rail 3, so that the finger performs active friction on the sample 9, so as to obtain the active friction characteristics of the finger on the sample 9; when the active static friction experiment is needed, the pressure sensor 2 is in a free state, the finger clamping device 1 is moved on the active friction guide rail 3, so that the finger drives the pressure sensor 2 and the sample 9 to move together, so as to achieve the effect that the finger performs active static friction on the sample 9, so as to obtain the active static friction characteristics of the finger on the sample 9; when the passive friction experiment is needed, the finger clamping device 1 is stationary on the active friction guide rail 3, and the pressure sensor 2 is moved on the passive friction guide rail 4 or the pressure sensor 2 is rotated, so as to achieve the effect that the sample 9 performs active friction on the finger, that is, the finger performs passive friction, so as to obtain the passive friction characteristics of the finger on the sample 9; when the passive static friction experiment is needed, the finger clamping device 1 is in a free state, the pressure sensor 2 is moved on the passive friction guide rail 4, so that the sample 9 drives the finger clamping device 1 and the finger to move together, so as to achieve the effect that the sample 9 performs active static friction on the finger, that is, the finger performs passive static friction, so as to obtain the passive static friction characteristics of the finger on the sample 9. Therefore, through the design of the application, four kinds of finger friction experiment can be performed, compared with the traditional experimental device, the experimental data is more comprehensive and accurate. At the same time, the pressure between the finger and the sample 9 can be adjusted by the distance between the active friction guide rail 3 and the passive friction guide rail 4, so as to obtain the friction experimental data under different pressures.

[0029] The above only describes the best embodiments of the application, but cannot be understood as limiting the claims. The application is not limited to the above embodiments, and the specific structure allows changes. Any changes made within the protection scope of the independent claims of the application are within the protection scope of the application.

Claims

1. A multi-mode finger rub experiment apparatus, characterized by: The device comprises a finger clamping device (1) for fixing fingers and a pressure sensor (2) for placing samples (9) for friction test, the finger clamping device (1) is movably connected to an active friction guide rail (3), the pressure sensor (2) is movably connected to a passive friction guide rail (4), the active friction guide rail (3) and the passive friction guide rail (4) are parallel to each other and are arranged in the horizontal direction, and the active friction guide rail (3) is further movably connected to an adjusting guide rail (5) arranged vertically, when the finger clamping device (1) is fixed and the pressure sensor (2) is moved, the passive friction reaction of the fingers is observed, when the finger clamping device (1) is moved and the pressure sensor (2) is fixed, the active friction reaction of the fingers is observed, the distance between the active friction guide rail (3) and the passive friction guide rail (4) is used to control the pressing force between the fingers and the sample (9), the finger clamping device (1) comprises two finger clamping plates (1.3), the two finger clamping plates (1.3) are provided with finger clamping holes (1.3.1) for preventing the fingers from retracting, the two finger clamping plates (1.3) are arranged in parallel, and the two finger clamping holes (1.3.1) are coaxially arranged, the finger clamping device (1) further comprises a connecting plate (1.1) and a rotating plate (1.2), the connecting plate (1.1) is movably connected to the active friction guide rail (3), one side of the rotating plate (1.2) is adjustably connected to the connecting plate (1.1) at an angle, the other side of the rotating plate (1.2) is used for fixedly connecting the two finger clamping plates (1.3), the rotating plate (1.2) is arranged at one end of the connecting plate (1.1), the connecting plate (1.1) is further provided with a supporting portion (1.5) for supporting the arm, the supporting portion (1.5) is arranged at the bottom end of the connecting plate (1.1), the supporting portion (1.5) is arranged along the rotating plate (1.2) to the other end of the connecting plate (1.1), the upper side of the pressure sensor (2) is provided with a tray (7), the upper end surface of the tray (7) is provided with a camera hole (7.1), and the camera hole (7.1) is provided with a camera (8).

2. A multi-mode finger rub experiment apparatus as claimed in claim 1, wherein: The connecting portion of the connecting plate (1.1) and the rotating plate (1.2) is provided with a positioning hole (1.1.1) arranged uniformly in the circumferential direction of the rotating plate (1.2), The rotating plate (1.2) is provided with a positioning shaft (1.2.1) matched with the positioning hole (1.1.1), and the connecting portion of the connecting plate (1.1) and the rotating plate (1.2) is further provided with a fixing bolt (1.4) for fixing the two.

3. The multi-mode finger rub experiment apparatus of claim 1, wherein: The active friction guide rail (3) is provided with a limiting probe (3.1), and the connecting plate (1.1) is provided with a limiting sheet (1.1.2), when the limiting sheet (1.1.2) reaches the position of the limiting probe (3.1), the connecting plate (1.1) stops moving.

4. The multi-mode finger rub experiment apparatus of claim 1, wherein: The circumferential direction of the finger clamping hole (1.3.1) is provided with a finger clamping air bag (1.3.2).

5. The multi-mode finger rub experiment apparatus of claim 1, wherein: The middle part of the active friction guide rail (3) is movably connected to the adjusting guide rail (5), and the two ends of the active friction guide rail (3) are movably connected to two balance guide rails (6), one side of the adjusting guide rail (5) is provided with a height scale (5.1), the active friction guide rail (3) is provided with an indicating arrow (3.2), the adjusting guide rail (5) comprises an adjusting screw rod (5.2), the active friction guide rail (3) is movably connected to the adjusting screw rod (5.2) through a connecting block (5.3), and the top end of the adjusting screw rod (5.2) is provided with a screw micrometer (5.4).

6. A multi-mode finger rub experiment apparatus as claimed in claim 5, wherein: The adjusting screw rod (5.2) is also connected with a lock catch (5.5), and the lock catch (5.5) is used for fixing the adjusting screw rod (5.2).

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