Sliding block for measuring surface friction coefficient of medical hydrogel

Abstract

The utility model discloses a medical hydrogel surface friction coefficient measuring sliding block which comprises a base and further comprises a pressing block arranged at the lower end of the base. The simulation soft cushion is installed at the lower end of the pressing block, and the area of the simulation soft cushion is not larger than 200 mm < 2 >; the counterweight assembly is mounted at the upper end of the base; the at least one sensor connecting column is installed on the base, the simulation soft cushion can simulate the condition that biological tissue makes contact with measured medical hydrogel, the whole friction coefficient measurement is more accurate, the pressing block with the small bottom face area is adopted, and the device is suitable for friction coefficient measurement of small-area medical hydrogel. The test slide block can solve the problems that the test slide block of the existing friction coefficient instrument cannot simulate the real contact condition of medical hydrogel and biological tissues and cannot be applied to the lubricity test of small-area materials.

Description

TECHNICAL FIELD

[0001] The utility model relates to material friction coefficient determination technical field, concretely is a medical water gel surface friction coefficient determination sliding block. BACKGROUND

[0002] The commercially available friction coefficient instrument can be used for measuring the static friction coefficient and the dynamic friction coefficient of materials such as plastic film and sheet, rubber, paper, paperboard, woven bag, fabric style, metal material composite belt for communication cable optical cable, conveying belt, wood, coating, brake pad, windshield wiper, shoe material, tire and the like when sliding, and by measuring the friction coefficient (smoothness) of the materials, the production quality process indicators of the materials can be controlled and adjusted to meet the product use requirements. In addition, the friction coefficient instrument can also be used for measuring the smoothness of daily chemical products such as cosmetics and eye drops. However, the sliding blocks in the related friction coefficient instrument products are all for the standard size (67*67mm) and weight (200g, 500g, 1000g) of the film, and there is no corresponding sliding block for the lubricity test of small-size materials such as medical water gel materials. Moreover, the existing sliding blocks cannot simulate the real contact between the medical water gel and the biological tissue, which affects the authenticity and accuracy of the lubricity test of high-value medical materials such as medical water gel. SUMMARY

[0003] The utility model provides a kind of medical water gel surface friction coefficient determination sliding block, can solve the problem that the test sliding block of existing friction coefficient instrument cannot simulate the real contact between medical water gel and biological tissue, and cannot be applied to the lubricity test of small-area material.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of medical water gel surface friction coefficient determination sliding block, including pedestal, further including pressing block, setting in the lower end of the pedestal;Simulate soft pad, is installed in the lower end of the pressing block, the area of the simulate soft pad is not more than 200mm 2 ; Counterweight assembly is installed in the upper end of the pedestal;At least one sensor connecting column is installed on the pedestal, simulate soft pad can simulate the contact between biological tissue and the medical water gel to be measured, so that the whole friction coefficient determination is more accurate, using the pressing block with smaller bottom area, suitable for the friction coefficient determination of small-area medical water gel.

[0005] As preferred, the simulate soft pad is soft silicone pad, which can effectively simulate biological tissue.

[0006] As preferred, the bottom of the pressing block is square, and the bottom area is 100mm 2 , the shape of the simulate soft pad is the same as the bottom of the pressing block, which is convenient to manufacture and small in area.

[0007] As preferred, the counterweight assembly comprises a sleeve joint column arranged at the upper end of the base, and a plurality of detachable counterweight blocks are sleeved on the sleeve joint column, which facilitates the placement and removal of the counterweight blocks, and the whole is stable.

[0008] As preferred, the sensor connecting column has two, and is respectively arranged at the two sides of the counterweight assembly on the base, and any one of the sensor connecting columns can be selected for use.

[0009] As preferred, the sensor connecting column comprises a screw part and a connecting part arranged at the lower end of the screw part, the screw part is fixed through the base, and the connecting part is provided with a connecting ring groove, the sensor connecting column is fixed, and the connecting ring groove facilitates the connection and fixation of the sensor pull rope on the friction coefficient instrument.

[0010] Compared with the prior art, the medical hydrogel surface friction coefficient measuring slide block has the advantages that:

[0011] The structure is simple, the base of the slide block has a small bottom area in contact with the sample, and a small amount of sample can be measured; the base of the slide block is light in weight, and the weight can be adjusted, so that the base of the slide block can be used for testing hydrogel samples; the soft silica gel pad simulating the flesh of a living body is arranged on the bottom surface of the base of the slide block, so that the contact interface between the medical hydrogel and the organism can be effectively simulated. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional structure diagram of the utility model;

[0013] Figure 2 It is a use state schematic diagram of the utility model.

[0014] REFERENCE SIGNS:

[0015] 1, base, 2, sleeve joint column, 3, counterweight block, 4, sensor connecting column, 5, connecting part, 6, connecting ring groove, 7, pressing block, 8, simulated soft pad. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0017] The utility model discloses a medical hydrogel surface friction coefficient measuring slide block, which can simulate the real contact between medical hydrogel and biological tissue, and can be applied to the lubricity test of small-area materials. Figures 1-2 As shown in the drawings, the following technical scheme is provided: a medical hydrogel surface friction coefficient measuring slide block, comprising a base 1, a pressing block 7 arranged at the lower end of the base 1, a simulated soft pad 8 installed at the lower end of the pressing block 7, and the area of the simulated soft pad 8 is not greater than 200mm 2The weight assembly is installed on the upper end of the base 1; at least one sensor connecting column 4 is installed on the base 1, and the simulation soft pad 8 can simulate the condition that the biological tissue is in contact with the measured medical hydrogel, so that the whole friction coefficient measurement is more accurate, and the pressing block 7 with a smaller bottom area is adopted, and is suitable for the friction coefficient measurement of the medical hydrogel with a small area.

[0018] Specifically, when in use, as shown in the figure, Figure 2 the measured medical hydrogel is laid on the test table of the friction coefficient instrument. Since the medical hydrogel has a relatively high value and its material characteristics make it unable to be laid on a relatively large area, the slider in the embodiment is placed on the measured medical hydrogel, the simulation soft pad 8 is in contact with the measured medical hydrogel, the weight value of the weight assembly is adjusted according to the test requirement, the pulling rope of the sensor on the friction coefficient instrument is connected to the sensor connecting column 4, and then the test can be started. The slider is pulled by the pulling rope to make the simulation soft pad 8 relatively slide with the measured medical hydrogel, so that the real friction coefficient between the medical hydrogel and the biological tissue can be tested.

[0019] In the embodiment, the simulation soft pad 8 is a soft silica gel pad, which can effectively simulate the biological tissue. As a preferred embodiment, the bottom surface of the pressing block 7 is a square, the bottom surface area is 100mm 2 , and the simulation soft pad 8 has the same shape as the bottom surface of the pressing block 7, which is convenient to manufacture and has a small area.

[0020] In the embodiment, as a specific embodiment of the weight assembly, as shown in the figure, Figure 1 the weight assembly includes a sleeve joint column 2 arranged on the upper end of the base 1, and a plurality of weight blocks 3 detachably sleeved on the sleeve joint column 2. The weight blocks 3 are convenient to place and take away, the structure is stable as a whole, and the overall height of the weight assembly is not too high, which can affect the balance of the slider.

[0021] In the embodiment, the sensor connecting column 4 has two and is respectively installed on the base 1 at the two sides of the weight assembly, and any one of the sensor connecting columns 4 can be selected for use.

[0022] As a specific structure of the sensor connecting column 4, as shown in the figure, Figure 1 the sensor connecting column 4 includes a screw part and a connecting part 5 arranged at the lower end of the screw part, the screw part penetrates through the base 1 and is fixed, and the connecting part 5 is provided with a connecting ring groove 6. The sensor connecting column 4 is installed firmly, and the connecting ring groove 6 is convenient to connect and fix with the sensor pulling rope on the friction coefficient instrument.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, rear, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0025] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A medical hydrogel surface coefficient of friction measuring sled comprising a base (1), characterised in that, Also include: Briquettes (7) are arranged in the lower end of the base (1); A simulation soft pad (8) is installed at the lower end of the pressing block (7), and the area of the simulation soft pad (8) is not greater than 200 mm 2 ; Counterweight assembly installed on the upper end of the base (1); At least one sensor connecting column (4) is installed on the base (1).

2. The medical hydrogel surface coefficient of friction measurement sled of claim 1, wherein: The simulated soft pad (8) is a soft silica gel pad.

3. The medical hydrogel surface coefficient of friction measurement sled of claim 2, wherein: The bottom surface of the pressing block (7) is square, and the bottom surface area is 100 mm 2 The shape of the simulated soft pad (8) is the same as the bottom surface of the pressing block (7).

4. The medical hydrogel surface coefficient of friction measurement sled of claim 1, wherein: The counterweight assembly includes a sleeve column (2) arranged at the upper end of the base (1), and a plurality of detachable counterweight blocks (3) are sleeved on the sleeve column (2).

5. The medical hydrogel surface coefficient of friction measurement sled of claim 1, wherein: The sensor connecting column (4) has two, and is respectively installed on the base (1) on both sides of the counterweight assembly.

6. The medical hydrogel surface coefficient of friction measurement sled of claim 5, wherein: The sensor connecting column (4) includes a screw part and a connecting part (5) arranged at the lower end of the screw part, the screw part passes through the base (1) and is fixed, and the connecting part (5) is provided with a connecting ring groove (6).

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