Automatic detection device for initial viscous force of medical application and use method of automatic detection device

Abstract

The invention relates to the technical field of medical instrument detection, and provides a medical application initial viscous force automatic detection device and a use method thereof.The device comprises a base platform, a test plate, a positioning mechanism, a ball storage disc, a release mechanism and a slideway, the test plate is obliquely arranged, the inclination angle is adjustable, the positioning mechanism is used for fixing and releasing a to-be-detected steel ball, and the ball storage disc is used for storing the to-be-detected steel ball; the ball storage disc is provided with ball storage frames of various specifications, the ball storage frames of various specifications are divided into a left row and a right row, the sliding way is arranged between the ball storage frames of the left row and the right row, the bottom of the end, close to the sliding way, of each ball storage frame is provided with a storage position used for temporarily storing steel balls, and the releasing mechanism is installed on the ball storage disc and used for pushing the steel balls located on the storage positions into the sliding way. And the slideway is used for guiding the steel ball falling from the storage position to the test plate so as to be fixed at the starting position of the steel ball by the positioning mechanism. According to the invention, adhesion environments in different application scenes can be simulated, the test angle of the test board is adjusted according to actual conditions, the test efficiency is improved, and the test cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical device testing technology, and more specifically, to an automatic detection device for the initial adhesion of medical dressings and a method for using the device. The device can be used to evaluate the initial adhesion performance of materials such as medical dressings and pressure-sensitive tapes, and is particularly suitable for quality control and R&D optimization during the production process of medical patches. Background Art

[0002] The initial adhesion test device for medical dressings or tapes often uses the inclined surface rolling ball method, which evaluates the adhesion of the material surface by the rolling behavior of a steel ball on an inclined plate. For example, the first method "Determination of Initial Adhesion" in Part IV of the 2020 edition of the Chinese Pharmacopoeia, Part 0952 "Determination of Adhesion," and the method A "Inclined Surface Rolling Ball Method" in GB / T4852-2002 "Test Method for Initial Adhesion of Pressure-Sensitive Adhesive Tapes (Rolling Ball Method)" have similar test principles. In both cases, a suitable series of steel balls are rolled over the sticky surface of the test sample placed on an inclined plate, and the initial adhesion is evaluated based on the maximum steel ball size that can be adhered to the sticky surface of a specified length.

[0003] At present, the initial adhesion test device based on the inclined ball rolling method generally includes an inclined plate, a base, a stainless steel ball and a ball box. During the test, the steel ball is placed on the inclined plate manually, and the initial adhesion is tested by the natural rolling of the steel ball on the sticky surface of the test sample. However, it has the following problems: 1. The operation is dependent on manual labor: the steel ball needs to be placed manually, which easily introduces the initial force of the steel ball's natural rolling, causing human error; 2. Insufficient positioning accuracy: the initial position of the steel ball is difficult to maintain consistency, affecting the repeatability of the test results; 3. Low test efficiency: in the process of screening the largest steel ball that can stick, the steel ball needs to be replaced manually many times for retesting, which has high labor costs and low efficiency; 4. Limited angle adjustment: the traditional equipment has a fixed tilt angle and cannot simulate the adhesion environment under different application scenarios; 5. Low degree of automation: the detection cost is high, the efficiency is low, and it is difficult to meet the needs of batch testing;

[0004] Therefore, there is an urgent need for a high-precision, automated and adaptable initial adhesion detection device. Summary of the Invention

[0005] Based on this, in order to solve the problems existing in the existing initial adhesion test device, the present invention provides a medical dressing initial adhesion automatic detection device and a method of use thereof, and its specific technical solution is as follows:

[0006] The test plate is tilted and has an adjustable inclination angle, and the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate; the medical dressing is arranged on the test plate

[0007] The automatic detection device for the initial adhesion of a medical dressing can simulate the adhesion environment in different application scenarios by setting a test plate with an adjustable inclination angle, and adjust the test angle of the test plate according to actual conditions, thereby solving the problem that the traditional equipment has a fixed inclination angle and cannot simulate the adhesion environment in different application scenarios; by setting a positioning mechanism, a ball storage plate, a release mechanism and a slide, the release mechanism automatically pushes the steel ball into the slide, and then the slide guides the steel ball to fall into the test plate and is fixed at the starting position of the steel ball by the positioning mechanism, and finally the positioning mechanism releases the steel ball, allowing the steel ball to roll freely on the test plate from a stationary state, which not only ensures the consistency of the initial position of the steel ball when it rolls freely on the test plate, but also does not introduce the initial force of the steel ball rolling naturally, thereby solving the problem that the existing initial adhesion test device relies on manual placement of the steel ball, which is easy to introduce the initial force of the steel ball rolling naturally and causes human error, as well as insufficient positioning accuracy, and it is difficult for the initial position of the steel ball to remain consistent, thereby affecting the repeatability of the test results.

[0008] In addition, since the ball storage tray is equipped with ball storage frames of various specifications, the steel balls located in the storage position can be automatically pushed into the slide through the release mechanism. The automatic detection device for the initial adhesion of medical dressings does not require manual replacement of steel balls for retesting multiple times. Secondly, it can meet batch testing needs, improve testing efficiency, and reduce testing costs.

[0009] Preferably, it also includes an adjustable support structure for supporting and adjusting the inclination angle of the test board. The base platform includes a horizontal plane and a vertical plane at right angles to each other. One end of the adjustable support structure is vertically installed on the horizontal plane, and the other end of the adjustable support structure is fixedly installed on the test board.

[0010] Preferably, the adjustable support structure includes a first support rod, a second support rod and a ball hinge, one end of the first support rod is vertically installed on a horizontal plane and the other end is connected to one end of the second support rod through a ball hinge, the other end of the second support rod is fixedly installed on the test board, and the ball hinge is provided with a locking mechanism.

[0011] Preferably, the ball storage frame is rectangular and each ball storage frame stores multiple steel balls of the same specifications. The storage positions are holes with diameters matching the diameters of the steel balls stored in the corresponding ball storage frame, and the center points of the holes on the same row of ball storage frames are on the same axis.

[0012] Preferably, the bottom of the ball storage frame has an inclined slope and the height of one end close to the slide is less than the height of the other end away from the slide, and the edge of the ball storage frame close to the slide is used as a blocking portion.

[0013] Preferably, the release mechanism includes a guide rail, a swing arm, a push rod and a driving component. The guide rail is fixedly mounted on the ball storage tray and is located on the back of the slide. The guide rail is parallel to the slide. The swing arm is slidably connected to the guide rail and is configured to move back and forth along the slide and swing 90 degrees relative to the slide. The push rod is installed on the end of the swing arm away from the guide rail and is configured to be driven by the driving component to move relative to the hole, so as to pass through the hole and push the steel ball in the hole into the slide.

[0014] Preferably, a damping rubber sheet is provided at the exit of the slideway near the test plate for slowing down the speed of the steel ball when it falls into the test plate.

[0015] Preferably, two parallel horizontal lines are provided on the surface of the test plate. The horizontal line close to the positioning mechanism is used to mark the starting position of the steel ball, and the horizontal line away from the positioning mechanism is used to mark the fixed position of the medical dressing to be tested.

[0016] A method for using a device for automatically detecting the initial adhesion of a medical dressing is provided, and is applied to the device for automatically detecting the initial adhesion of a medical dressing, and comprises the following steps:

[0017] Adjust the inclination of the test board according to the test requirements, fix the medical dressing to be tested on the test board with the adhesive surface facing upwards;

[0018] Steel balls of different specifications are placed in the corresponding ball storage frames. The release mechanism pushes the steel balls in the storage position into the slideway one by one in descending order of diameter. The slideway guides the steel balls falling from the storage position to the test plate and is fixed at the starting position of the steel balls by the positioning mechanism.

[0019] The positioning mechanism releases the steel ball to be tested fixed at the starting position of the steel ball, so that the steel ball to be tested rolls freely to the medical dressing to be tested;

[0020] The initial adhesion force of the medical dressing to be tested is evaluated by the maximum diameter of the steel ball that can be adhered to the adhesive surface of the medical dressing to be tested.

[0021] Preferably, the method for using the device for automatically detecting the initial adhesion of a medical patch further comprises the following steps:

[0022] The test is started by the PLC controller, and the light sensor installed in the ball receiving box is turned on and the timing begins;

[0023] If the steel ball to be tested is sensed to fall into the ball receiving box within the preset time, the PLC controller determines that the steel ball to be tested does not meet the requirements and controls the release mechanism to push a smaller steel ball into the slideway. If the steel ball to be tested does not fall into the ball receiving box within the preset time, the PLC controller determines that the steel ball to be tested meets the requirements.

[0024] The ball receiving box is installed on the horizontal surface of the base platform and is located directly below the end of the test board. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but rather the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0026] Figure 1 This is a schematic diagram of the overall structure of an automatic detection device for the initial adhesion of a medical dressing according to one embodiment of the present invention;

[0027] Figure 2 This is a structural diagram of a ball storage tray in one embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the structural relationship between the ball storage tray and the release mechanism in one embodiment of the present invention;

[0029] Figure 4 is a schematic structural diagram of a test board in one embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall process of using a device for automatically detecting the initial adhesion of a medical patch according to one embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the overall process of using a device for automatically detecting the initial adhesion of a medical patch in another embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Base platform; 2. Test plate; 3. First support rod; 4. Second support rod; 5. Ball hinge; 6. Positioning mechanism; 7. Ball storage tray; 8. Release mechanism; 9. Slide; 10. Horizontal plane; 11. Vertical plane; 12. Ball receiving box; 13. Steel ball to be tested; 14. Upper line; 15. Lower line; 16. Test sample; 17. Rubber sheet; 70. Ball storage frame; 71. Storage position; 72. Groove; 80. Guide rail; 81. Pulley; 82. Swing arm; 83. Drive component; 90. Horizontal section; 91. Vertical section. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0038] like Figures 1-4 As shown, an automatic detection device for the initial adhesion of a medical dressing in one embodiment of the present invention comprises a base platform (1) and a test plate (2) mounted on the base platform (1), wherein the test plate (2) is tilted and the tilt angle is adjustable, and a test sample (16) (medical dressing) is placed on the test plate (2) with the adhesive surface facing upward.

[0039] As a preferred technical solution, the medical dressing initial adhesion automatic detection device also includes an adjustable support structure for supporting and adjusting the inclination angle of the test plate (2); the base platform (1) adopts an aluminum alloy frame and includes a horizontal surface (10) and a vertical surface (11) at right angles to each other; one end of the adjustable support structure is vertically mounted on the horizontal surface (10), and the other end of the adjustable support structure is fixedly mounted on the test plate (2), for example, at the middle position.

[0040] The adjustable support structure includes a first support rod (3), a second support rod (4) and a ball hinge (5), one end of the first support rod (3) is vertically mounted on a horizontal plane (10) and the other end is connected to one end of the second support rod (4) through the ball hinge (5), the other end of the second support rod (4) is fixedly mounted on the test plate (2), and the ball hinge (5) is provided with a locking mechanism. The locking mechanism includes but is not limited to bolt locking and snap locking to prevent the change of the inclination angle of the test plate (2). When the inclination angle of the test plate (2) needs to be adjusted, the ball hinge (5) is loosened, and then the test plate (2) is adjusted up and down. After the inclination angle of the test plate (2) is adjusted, the ball hinge (5) is locked by the locking mechanism.

[0041] Angle scale lines are provided on the outer wall surface of the ball head of the ball hinge (5) for technicians to refer to when adjusting the inclination angle of the test plate (2), so as to better achieve accurate adjustment of the inclination angle (15° to 45°) of the test plate (2) within the range of ±1°.

[0042] The test plate (2) is made of stainless steel having a thickness greater than 2 mm, preferably 3 mm. The test surface of the test plate (2) is smooth, and has two horizontal lines spaced 10 mm apart and parallel to each other. The horizontal line (upper line (14)) closer to the positioning mechanism (6) is used to mark the starting position of the steel ball, and the horizontal line (lower line (15)) farther from the positioning mechanism (6) is used to mark the fixed position of the medical dressing to be tested.

[0043] The medical patch initial adhesion automatic detection device further comprises a positioning mechanism (6), a ball storage tray (7), a release mechanism (8) and a slideway (9); a steel ball starting position is provided on the test plate (2); the positioning mechanism (6) is used to fix the steel ball (13) to be tested at the steel ball starting position and to release the steel ball (13) to be tested fixed at the steel ball starting position; the ball storage tray (7) is fixedly mounted on the base platform (1) and is located above the adjustable inclination test plate (2); the ball storage tray (7) is provided with ball storage frames (70) of various specifications; Ball storage frames (70) of various specifications are divided into two left and right columns, and slideways (9) are arranged in the middle of the two left and right columns of ball storage frames (70). A storage position (71) for temporarily storing steel balls is provided at the bottom of the ball storage frame (70) near one end of the slideway (9). A release mechanism (8) is installed on the ball storage tray (7) and is used to push the steel balls located on the storage position (71) into the slideway (9). The slideway (9) is used to guide the steel balls falling from the storage position (71) to the test plate (2) so as to be fixed at the starting position of the steel balls by the positioning mechanism (6).

[0044] The positioning mechanism (6) is preferably an electromagnetic positioning coil arranged at the starting position of the steel ball. The electromagnetic positioning coil uses electromagnetic adsorption force to position the steel ball (13) to be tested at the starting position of the steel ball, ensuring that the starting point of each test is consistent. After the test is started, the electromagnetic positioning coil automatically cuts off power and releases the steel ball, so that the steel ball (13) to be tested begins to roll freely from a static state. In this way, the positioning mechanism (6) reduces errors caused by human operation.

[0045] The diameter of the coil in the electromagnetic positioning coil can be changed to adapt to steel balls of different specifications.

[0046] The ball storage tray (7), the release mechanism (8) and the slideway (9) constitute a steel ball sequence delivery system. The ball storage tray (7) is fixedly mounted on the vertical surface (11) of the base platform (1). The ball storage frame (70) is rectangular and each ball storage frame (70) stores a plurality of steel balls of the same specification. The storage position (71) is a hole whose diameter matches the diameter of the steel balls stored in the corresponding ball storage frame (70). The center points of the holes on the same row of ball storage frames (70) are on the same axis. Specifically, the number and size of the ball storage frames (70) can be designed according to demand. Each size of the ball storage frame (70) stores steel balls of the same specification, and the number of steel balls is not less than 3. The ball storage tray (7) is made of 3D printed plastic as a whole to ensure a smooth inner wall and reduce friction.

[0047] The diameter of the hole is about two-thirds of the diameter of the steel ball in the ball storage frame (70). The bottom of the ball storage frame (70) has an inclined slope and the height of the end close to the slideway (9) is less than the height of the end away from the slideway (9). The edge of the end of the ball storage frame (70) close to the slideway (9) is used as a blocking part. Specifically, the inclined slope can be set to 5°, and its main function is to make the steel balls in the ball storage frame (70) automatically roll down to the storage position (71).

[0048] The blocking portion can be set as a groove (72), the diameter of the groove (72) is consistent with the diameter of the steel ball in the ball storage frame (70) corresponding to the groove (72), and the height of the lowest point of the groove (72) relative to the lowest point of the bottom of the ball storage frame (70) is equal to the radius of the corresponding steel ball, so as to prevent the steel ball in the storage position (71) from rolling down the slideway (9) and waiting for the release mechanism (8) to be ejected. The grooves (72) corresponding to the multiple ball storage frames (70) are not required to be on the same axis. The distance between the groove (72) and the center point of the hole can be designed according to the specifications of the steel ball to ensure that the steel ball is located in the middle of the hole.

[0049] The slideway (9) is composed of two sections at right angles to each other, one of which is a horizontal section (90) located in the middle of the ball storage tray (7), and the other is a vertical section (91) located above the ball storage tray (7) near the test plate (2) and connected to the horizontal section (90). The cross section of the horizontal section (90) is arc-shaped, and its bottom surface has a 5° slope to guide the steel balls to slide down to the vertical section (91) by gravity. When the width of the horizontal section (90) gradually decreases from the end close to the test plate (2) to the end away from the test plate (2), the radius of the smallest part of the arc is 1.1 times the diameter of the largest steel ball in the ball storage tray (7).

[0050] The vertical section (91) is a circular pipe, the diameter of which is 1.1 times the diameter of the largest steel ball in the ball storage tray (7). Damping rubber sheets (17) are provided on the left and right sides of the exit of the slideway (9) to control the speed at which the steel balls slide down and slow down the speed at which the steel balls fall into the test plate (2).

[0051] As a preferred technical solution, the release mechanism (8) includes a guide rail (80), a swing arm (82), a push rod and a driving component (83), wherein the guide rail (80) is fixedly mounted on the ball storage tray (7) and is located on the back of the slideway (9), the guide rail (80) is parallel to the slideway (9), the swing arm (82) is slidably connected to the guide rail (80) and is configured to move back and forth along the slideway and to swing 90 degrees relative to the slideway, and the push rod is mounted on one end of the swing arm (82) away from the guide rail (80) and is configured to be driven by the driving component (83) to move relative to the hole, so as to pass through the hole and push the steel ball located in the hole into the slideway (9).

[0052] The center point of the push rod aligns with the center axis of the hole to ensure it can pass through the hole. The tip of the push rod is wrapped with a silicone pad to prevent damage to the ball. The inner wall of the ball receiving box is lined with a soft material to prevent the steel ball from bouncing when it rolls into the box.

[0053] Specifically, the swing arm (82) is slidably connected to the guide rail (80) via a pulley (81). A micro-cylinder for driving the swing arm (82) to move back and forth along the guide rail (80) is fixedly installed on the surface of the ball storage tray (7) away from the ball storage frame (70). The PLC controller is connected to the micro-cylinder signal and drives the micro-cylinder to move by sending a positioning movement instruction to the micro-cylinder. When the micro-cylinder receives the positioning movement instruction, it drives the swing arm (82) to move to the set position of the ball storage frame (70), and then drives the push rod to move, so that the steel ball located in the hole falls into the slideway (9). The micro-cylinder drives the swing arm (82) to move back and forth along the guide rail (80) by driving the pulley (81). A rotating cylinder for driving the swing arm (82) to swing 90 degrees is installed between the swing arm (82) and the pulley (81).

[0054] A cylindrical housing is fixedly mounted on one end of the swing arm (82) away from the guide rail (80), with the housing's axis perpendicular to the ball storage tray (7). A motor (i.e., the drive component (83) includes the motor) is mounted at the bottom of the push rod. The push rod is sleeved within the housing, and the motor is connected to the push rod to drive the push rod to extend and retract within the housing. It is understood that the motor, housing, and push rod constitute a motor telescopic rod structure. Since the specific motor telescopic rod structure is a conventional technical means in this field, it will not be described in detail here.

[0055] The rod body of the push rod is circular and perpendicular to the ball storage tray (7). The diameter gradually increases from one end close to the ball storage tray (7) to the other end. When the swing arm (82) slides to the set position, the motor drives the push rod to extend and pass through the hole to push the steel ball up. The raised steel ball slides through the groove (72) and falls onto the slideway (9) under the action of inertia. Here, the diameter of the part of the rod body passing through the hole is about two-thirds of the diameter of the smallest hole on the ball storage tray (7).

[0056] The automatic detection device further comprises a ball receiving box (12), which is mounted on the horizontal surface (10) of the base platform (1) and is located at the rightmost end of the base platform (1), below the falling ball of the test plate (2). Light sensors are mounted on the left and right sides of the ball receiving box, forming a symmetrical cross-beam arrangement. The light sensors are provided with filters to form an anti-interference design to prevent false triggering. The response time parameter of the light sensor is ≤0.1s, and the light sensor has the function of sensing the rolling of the steel ball and transmitting the signal to the PLC controller.

[0057] The PLC controller has a programming function for controlling the automatic placement of steel balls according to a preset diameter sequence and determining the initial adhesion result based on the feedback signal of the light-sensitive sensor, thereby realizing a fully automated test. In addition, the PLC controller is also used to control the operation of the electromagnetic positioning coil on the test board (2), the micro cylinder and motor of the release mechanism (8), and the light-sensitive sensor of the ball receiving box (12).

[0058] In summary, the automatic detection device for the initial adhesion of medical dressings can simulate the adhesion environment in different application scenarios by setting a test plate (2) with an adjustable inclination angle, and adjust the test angle of the test plate (2) according to actual conditions, thereby solving the problem that the inclination angle of traditional equipment is fixed and cannot simulate the adhesion environment in different application scenarios; by setting a positioning mechanism (6), a ball storage plate (7), a release mechanism (8) and a slide (9), the release mechanism (8) automatically pushes the steel ball into the slide (9), and then the slide (9) guides the steel ball to fall into the test plate (2) and be The positioning mechanism (6) is fixed on the starting position of the steel ball, and finally the positioning mechanism (6) releases the steel ball, allowing the steel ball to roll freely on the test plate (2) from a stationary state. This not only ensures that the initial position of the steel ball when rolling freely on the test plate (2) is consistent, but also does not introduce the initial force of the steel ball rolling naturally. This solves the problem that the existing initial adhesion test device relies on manual placement of the steel ball, which is easy to introduce the initial force of the steel ball rolling naturally and causes human error, as well as insufficient positioning accuracy, and the initial position of the steel ball is difficult to maintain consistency, thereby affecting the repeatability of the test results.

[0059] In addition, since the ball storage tray (7) is provided with ball storage frames (70) of various specifications, the steel balls located on the storage position (71) can be automatically pushed into the slideway (9) through the release mechanism (8). The automatic detection device for the initial adhesion of medical dressings not only eliminates the need for manual replacement of steel balls for retesting, but also meets the needs of batch testing, thereby improving testing efficiency and reducing testing costs.

[0060] like Figure 5 As shown, one embodiment of the present invention further provides a method for using a medical dressing automatic initial tack detection device, which is applied to the medical dressing automatic initial tack detection device, and includes the following steps:

[0061] S1, adjusting the inclination angle of the test plate (2) according to test requirements, fixing the medical dressing to be tested on the test plate (2) with the adhesive surface of the medical dressing to be tested facing upward;

[0062] S2, steel balls of different specifications are placed in corresponding ball storage frames (70), and the release mechanism (8) pushes the steel balls located on the storage positions (71) into the slideway (9) one by one according to the decreasing diameter sequence, and the slideway (9) guides the steel balls falling from the storage positions (71) to the test plate (2) to be fixed at the starting position of the steel balls by the positioning mechanism (6);

[0063] S3, the positioning mechanism (6) releases the steel ball (13) to be tested fixed at the starting position of the steel ball, so that the steel ball (13) to be tested rolls freely onto the medical dressing to be tested;

[0064] The initial adhesion force of the medical dressing to be tested is evaluated by the maximum diameter of the steel ball that can be adhered to the adhesive surface of the medical dressing to be tested.

[0065] Preferably, if Figure 6 As shown, the method for using the automatic detection device for initial adhesion of a medical dressing further includes the following steps:

[0066] S4, the PLC controller starts the test, and at the same time turns on the light sensor installed in the ball receiving box (12) and starts timing;

[0067] S5, if the steel ball (13) to be tested is sensed to fall into the ball receiving box (12) within the preset time, the PLC controller determines that the steel ball (13) to be tested does not meet the requirements and controls the release mechanism (8) to push a smaller steel ball into the slideway (9); if the steel ball (13) to be tested is not sensed to fall into the ball receiving box (12) within the preset time, the PLC controller determines that the steel ball (13) to be tested meets the requirements;

[0068] The ball receiving box (12) is installed on the horizontal surface (10) of the base platform (1) and is located directly below the end of the test plate (2).

[0069] A method for using a device for automatically detecting the initial adhesion of a medical patch according to an embodiment of the present invention includes the following steps:

[0070] S1, adjusting the inclination angle of the test plate (2) according to the required test angle, and fixing the medical patch to be tested on the test plate (2) with the adhesive surface facing upwards.

[0071] S2, put the side opening of the steel ball storage tray (7) into the ball storage frame (70) of corresponding specifications, and slide one of the steel balls above the hole.

[0072] S3, under the control of the PLC controller, the swing arm (82) of the release mechanism (8) is driven by a micro cylinder to slide on the guide rail (80) to the designated position of the ball storage frame (70), at which time the swing arm (82) swings to the corresponding side, forming a 90-degree angle with the guide rail (80).

[0073] S4, the motor drives the push rod to extend and pass through the hole to push the steel ball up.

[0074] S5, the top steel ball slides down onto the horizontal slideway (9) through the groove (72) under the action of inertia, and falls down to the vertical section (91) along the horizontal section (90) of the slideway (9) under the action of gravity, and is decelerated by the damping rubber sheet (17) and falls onto the test plate (2).

[0075] S6, the electromagnetic positioning coil of the test board (2) attracts the steel ball when it is powered on.

[0076] S7, PLC control starts the test, the light-sensitive sensor of the ball box is turned on, the electromagnetic positioning coil is automatically powered off to release the steel ball, and the steel ball rolls over the medical patch to be tested on the test surface.

[0077] S8, when the light sensor senses that the steel ball rolls down to the ball receiving box within the specified time, the trigger signal is transmitted to the PLC controller, and the PLC controller determines that the steel ball of the ball number does not meet the requirements based on the signal, and issues a control instruction to release a steel ball of a smaller ball number to drive the release mechanism (8) to operate and start the next test step; when the steel ball does not roll down to the ball receiving box within the specified time, it is determined that the steel ball of the ball number meets the requirements, and the test of releasing the steel ball of the same ball number is sent until the judgment requirement is met and the test is stopped. The judgment requirement here can be understood as that multiple consecutive steel balls of the same ball number can be stuck by the sticky surface.

[0078] Specifically, the PLC controller records the automatic placement of the steel ball, collects relevant data and records the test results. The PLC controller is equipped with a data processing unit, which has a built-in algorithm to automatically calculate the initial adhesion level according to the Chinese Pharmacopoeia 2020 Edition Part IV 0952 or GB / T4852 standards. Specifically, the inclined ball rolling method can be understood as rolling the steel ball over the sticky surface of the sample on the inclined plate, and recording the maximum steel ball diameter (or ball number) that can be stuck. The larger the diameter, the higher the initial adhesion level. The grade judgment rule of the Chinese Pharmacopoeia 0952 is: among the three samples, if 2 or 3 reach the maximum ball number, or 1 maximum ball number and the other 2 are only 1 smaller, then it is judged to be qualified, and the grade corresponds to the maximum ball number; the grade judgment rule of GB / T4852 is: if all three samples stick to the same maximum ball number, or 2 maximum ball numbers + 1 smaller ball number 1, then it is judged to be qualified.

[0079] Assuming that the largest ball that sticks in the test results is No. 20 (diameter 20 / 32 inches), the No. 20 ball corresponds to the initial adhesion level 20. If all three specimens stick to the No. 20 ball, it meets the requirements of the Pharmacopoeia and GB / T4852.

[0080] The specific operation process is as follows:

[0081] (1) Parameter setting: Input the test standard (such as inclination angle 30°, steel ball diameter 1 inch) through the touch screen;

[0082] (2) Specimen installation: Fix the medical dressing with the adhesive side facing upwards to the test area of ​​the test plate (2);

[0083] (3) Start the test: the system automatically releases the steel ball and records the rolling steel ball number, and the data is displayed and stored in real time;

[0084] (4) Result output: Generate a comprehensive report including initial adhesion value, test curve and qualification judgment.

[0085] As a preferred technical solution, the method for using the automatic detection device for the initial adhesion force of medical patches also includes the following steps: converting the kinetic energy of the rolling steel ball into the adhesion work of the patch, calculating the initial adhesion force, and then dividing it into levels based on the needs of medical scenarios.

[0086] Specifically, when the steel ball rolls down the inclined plane, the kinetic energy (translation + rotation) is converted into the adhesion work of the application (the work done to overcome the initial adhesion force), and the total kinetic energy of the steel ball is Where v is the translational velocity, I is the moment of inertia, w is the angular velocity, and m is the mass of the steel ball. The steel ball is made of GCr15 bearing steel (in accordance with GB / T 308-2013). The mass is calculated from the diameter. ρ is the density of the steel ball.

[0087] For solid steel balls, Substituting into

[0088] When the steel ball slides down, the gravitational potential energy is converted into kinetic energy: Where g represents the acceleration due to gravity, h = Lsinθ is the height of the test plate's slope, L and θ are the distance the ball rolls down the test plate's slope (e.g., the standard rolling section is 100 mm + the first 50 mm of the test section, for a total of 0.15 m) and the slope's inclination angle. The final solution is:

[0089] Adhesion work W 粘 =F 粘 s, s is the rolling distance of the steel ball on the dressing (for example, if the medical dressing is 100 mm long and the steel ball stops at 50 mm, then s = 0.05 m; if the steel ball rolls away from the dressing, then s = 0.1 m). Convert the kinetic energy into adhesion work (ignoring air resistance), and we get E k =W 粘 =F 粘 ·s, that is

[0090]

[0091] Because the thickness h of the adhesive layer of a medical dressing, surface roughness Ra, and environmental factors (temperature T and humidity RH) significantly affect initial tack, correction factors are required. These correction factors include thickness correction, roughness correction, and environmental correction.

[0092] As for the thickness correction factor, it can be understood that the thicker the adhesive layer, the larger the contact area and the higher the initial adhesion. Let k h is the thickness correction factor, which is calibrated experimentally, such as k h =0.1m -1 .

[0093] For roughness correction, it can be understood that the rougher the adhesive surface, the stronger the mechanical interlocking effect and the higher the initial adhesion force. ra is the roughness correction coefficient, which can be calibrated experimentally, such as k ra =0.05μm -1 .

[0094] For environmental correction, it can be understood that increasing temperature will reduce viscosity (intensified molecular motion), and increasing humidity will change viscosity (hydration). The corresponding correction function is f(T,RH)=1-k T (T-T0)-k RH (RH-RH0). T and T0 represent the current ambient temperature and the standard ambient temperature respectively, RH and RH0 represent the current ambient humidity and the standard ambient humidity respectively, k T 、k RH The temperature and humidity represent the set viscosity variation coefficient and the humidity and viscosity variation coefficient respectively. Preferably, the standard ambient temperature can be set to 23 degrees Celsius, the standard ambient humidity can be set to 50%, and k T 、k RH Set to 0.01℃ respectively -1 and 0.5% -1 , that is, for every 1°C increase in temperature, the viscosity decreases by 1%, and for every 1% increase in humidity, the viscosity decreases by 0.5%.

[0095] After correction, the final calculation function of the initial adhesion force of the medical dressing is: Wherein, h represents the thickness of the adhesive layer of the medical dressing, which can be measured with a thickness meter (such as a micrometer) and the average value of three points is taken.

[0096] Based on the applicable parts of medical dressings (sensitivity, activity level), initial adhesion is divided into four levels. Each level corresponds to a clear initial adhesion value range and application scenario, as shown in the following table:

[0097]

[0098] The medical patch initial adhesion force calculation function quantifies the initial adhesion force through a kinetic energy-adhesion work conversion model. Combined with the special parameters (thickness, roughness, and environment) of the medical patch for correction, it can improve the accuracy of initial adhesion force detection, realize scenario-based grading, and solve the problem of the traditional inclined ball rolling method of "mainly qualitative and ignoring material properties". It is suitable for the research and development, quality control, and clinical application of medical patches.

[0099] In addition, the correction coefficient in the function formula can be calibrated experimentally, and multi-parameter correction (temperature, humidity, thickness of the adhesive layer, surface roughness) can be introduced, as well as graded according to the applicable parts of the medical patch (such as sensitive skin and joint activities). This also makes the method for using the automatic detection device for the initial adhesion of the medical patch have good scalability and practicality.

[0100] In general, the beneficial effects of using the method for automatically detecting the initial adhesion force of a medical dressing include:

[0101] 1. Realize automatic control: The PLC controller manages the steel ball delivery and data collection, which can replace manual operation and is suitable for continuous detection of production lines.

[0102] 2. High precision: The electromagnetic positioning coil can make the initial position error of the steel ball less than ±0.1mm, eliminating the initial driving force of the steel ball rolling, reducing human error and improving test repeatability.

[0103] 3. Multifunctional adaptability: Through the test plate (2) with adjustable inclination and the ball storage tray (7) of various specifications, it is compatible with the testing requirements of steel balls of different sizes (0.794mm to 50.8mm) and various materials (such as tapes, medical dressings, and protective films).

[0104] 4. From qualitative to quantitative: Converting the classic "steel ball size" into "initial adhesion value" better meets the precise needs of industrial quality control and medical evaluation.

[0105] 5. Multi-parameter correction: Introducing the thickness of the adhesive layer of the medical dressing, surface roughness and environmental factors solves the problem of traditional methods ignoring material properties and environmental influences.

[0106] 6. Scenario-based level: The medical patch is graded based on its applicable parts, so that the grade results can directly guide clinical application (e.g., level 1 for sensitive parts and level 3 for active parts).

[0107] 7. Scalability: The correction coefficient in the formula can be calibrated through experiments and is applicable to different brands and types of medical dressings (such as Babu plaster, hydrogel patch, etc.).

[0108] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0109] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A device for automatically detecting the initial adhesion of a medical patch, comprising a base platform and a test plate mounted on the base platform, wherein the test plate is tilted and the tilt angle is adjustable, and the medical patch is placed on the test plate, characterized in that: The ball storage tray is fixedly mounted on the base platform and is located above the adjustable inclination test plate. The ball storage tray is provided with ball storage frames of various specifications. The ball storage frames of various specifications are divided into two columns on the left and right, and the slide is arranged in the middle of the ball storage frames in the left and right columns. A storage position for temporarily storing steel balls is provided at the bottom of the ball storage frame near one end of the slide. The release mechanism is installed on the ball storage tray and is used to push the steel ball located at the storage position into the slide. The slide is used to guide the steel ball falling from the storage position to the test plate to be fixed at the steel ball starting position by the positioning mechanism.

2. The automatic detection device for initial adhesion of a medical dressing according to claim 1, characterized in that: It also includes an adjustable support structure for supporting and adjusting the inclination of the test board. The base platform includes a horizontal plane and a vertical plane at right angles to each other. One end of the adjustable support structure is vertically installed on the horizontal plane, and the other end of the adjustable support structure is fixedly installed on the test board.

3. The automatic detection device for initial adhesion of a medical dressing according to claim 2, characterized in that: The adjustable support structure includes a first support rod, a second support rod and a ball hinge. One end of the first support rod is vertically installed on a horizontal plane and the other end is connected to one end of the second support rod through a ball hinge. The other end of the second support rod is fixedly installed on the test board, and the ball hinge is provided with a locking mechanism.

4. The automatic detection device for initial adhesion of a medical dressing according to claim 1, characterized in that: The ball storage frame is rectangular and each ball storage frame stores multiple steel balls of the same specifications. The storage positions are holes with diameters matching the diameters of the steel balls stored in the corresponding ball storage frame. The center points of the holes on the same row of ball storage frames are on the same axis.

5. The automatic detection device for initial adhesion of a medical dressing according to claim 4, characterized in that: The bottom of the ball storage frame has an inclined slope and the height of one end close to the slide is smaller than the height of the other end away from the slide. The edge of the ball storage frame close to the slide is used as a blocking part.

6. The automatic detection device for the initial adhesion of a medical dressing according to claim 5, characterized in that: The release mechanism includes a guide rail, a swing arm, a push rod and a driving component. The guide rail is fixedly mounted on the ball storage tray and is located on the back of the slide. The guide rail is parallel to the slide. The swing arm is slidably connected to the guide rail and is configured to move back and forth along the slide and swing 90 degrees relative to the slide. The push rod is installed on the end of the swing arm away from the guide rail and is configured to be driven by the driving component to move relative to the hole, so as to pass through the hole and push the steel ball in the hole into the slide.

7. The automatic detection device for initial adhesion of a medical dressing according to claim 6, characterized in that: A damping rubber sheet is provided at the exit of the slideway near the test plate to slow down the speed of the steel ball when it falls into the test plate.

8. The automatic detection device for initial adhesion of a medical dressing according to claim 7, characterized in that: Two parallel horizontal lines are provided on the surface of the test plate. The horizontal line close to the positioning mechanism is used to mark the starting position of the steel ball, and the horizontal line away from the positioning mechanism is used to mark the fixed position of the medical dressing to be tested.

9. A method for using a device for automatically detecting the initial tack of a medical dressing, applied to the device for automatically detecting the initial tack of a medical dressing according to any one of claims 1 to 8, characterized in that: The steps include: Adjust the inclination of the test board according to the test requirements, fix the medical dressing to be tested on the test board with the adhesive surface facing upwards; Steel balls of different specifications are placed in the corresponding ball storage frames. The release mechanism pushes the steel balls in the storage position into the slideway one by one in descending order of diameter. The slideway guides the steel balls falling from the storage position to the test plate and is fixed at the starting position of the steel balls by the positioning mechanism. The positioning mechanism releases the steel ball to be tested fixed at the starting position of the steel ball, so that the steel ball to be tested rolls freely to the medical dressing to be tested; The initial adhesion force of the medical dressing to be tested is evaluated by the maximum diameter of the steel ball that can be adhered to the adhesive surface of the medical dressing to be tested.

10. The method for using the device for automatically detecting the initial adhesion of a medical patch according to claim 9, wherein: The following steps are also included: The test is started by the PLC controller, and the light sensor installed in the ball receiving box is turned on and the timing begins; If the steel ball to be tested is sensed to fall into the ball receiving box within the preset time, the PLC controller determines that the steel ball to be tested does not meet the requirements and controls the release mechanism to push a smaller steel ball into the slideway. If the steel ball to be tested does not fall into the ball receiving box within the preset time, the PLC controller determines that the steel ball to be tested meets the requirements. The ball receiving box is installed on the horizontal surface of the base platform and is located directly below the end of the test board.

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