Stretch sock tester and pressure performance testing device of stretch socks

Abstract

The invention relates to a stretch sock tester and a stretch sock pressure performance testing device.The stretch sock tester comprises an upper bearing pedestal and a lower bearing pedestal which are oppositely arranged in parallel, a lead screw is movably connected with the upper bearing pedestal and the lower bearing pedestal, an upper lead screw nut is arranged at the end, close to the upper bearing pedestal, of the lead screw, and a lower lead screw nut is arranged at the end, close to the lower bearing pedestal, of the lead screw; the end, close to the lower bearing seat, of the lead screw is provided with a lower lead screw nut, and the thread directions of the upper lead screw nut and the lower lead screw nut are opposite. A plurality of pressure sensors are arranged in the circumferential direction of the lead screw, the pressure sensing sides of the pressure sensors are fixedly connected with supporting plates, the lead screw is driven by the motor to rotate so as to drive the upper lead screw nut and the lower lead screw nut to move in the opposite direction or the opposite direction, and the sock supporting sleeve composed of the supporting plates is opened or tightened. Therefore, the stress state of the sock is changed. The stretch sock tester can continuously measure the pressure borne by the sock, and the accuracy of the measurement result is high.

Description

Technical Field

[0001] The invention relates to the technical field of pressure testing equipment, in particular to a compression stocking tester and a compression performance testing device for compression stockings. Background Art

[0002] The methods of sock testing cover many aspects to ensure the quality, safety and comfort of socks. For example, the sock size specification detection generally uses measuring tools (such as rulers, tape measures) to measure the length, tube circumference and other dimensions of the socks to ensure that the size of the socks meets the design requirements and avoids being too large or too small to affect the wearing experience. For surface defect detection, the surface of the socks is observed with the naked eye to check for holes, snagging, stains, uneven pattern printing and dyeing, and other problems. The tensile strength test generally uses a tensile testing machine to perform tensile tests along the longitudinal and transverse directions of the socks to test the socks' ability to withstand the stretching process and ensure that the socks are not easy to break during wearing and washing. The bursting strength test is for socks with a certain degree of elasticity. It tests its strength when it is subjected to top pressure and simulates the force of the socks when the feet are moving. The elastic recovery test is to test whether the socks can quickly restore their original shape after being stretched, evaluate the elastic recovery ability of the socks, and avoid the socks from becoming loose after long-term wear.

[0003] Medical elastic stockings, also known as medical graduated decompression elastic stockings, are a product that promotes venous blood return to the heart. Medical elastic stockings establish the highest support pressure at the ankle and gradually decrease upward along the leg. The pressure is reduced to 70%-90% of the maximum value at the calf and 25%-45% of the maximum value at the thigh. This decreasing change in pressure can make the venous blood return to the lower limbs, effectively relieve or improve the pressure on the lower limb veins and venous valves. Therefore, the pressure index of medical elastic stockings is its key performance parameter.

[0004] Chinese invention patent CN116165371A discloses a sock performance detection device and detection method, wherein the detection device includes a detection device and a pneumatic device, the detection device includes a detection head, a connection port is provided on the lower side of the detection head, detection ports are arranged at equal arc intervals in the detection head along the circumferential direction of the connection port at 3 / 4 of the height of the connection port, a sliding groove is provided on the inner side of the detection port, a detection rod is arranged in the detection port, an embedding pin is arranged on the inward end of the detection rod, each embedding pin is completely embedded in the corresponding sliding groove, thereby realizing the sliding connection between the detection rod and the detection port, a detection support rod is arranged on the circular surface of the outward end of the detection rod, and a detection support rod is arranged on the inner side of the detection rod. A pressure sensor is arranged on the circular surface of the outward end of each detection support rod, each pressure sensor is connected to the computing unit for communication, the computing unit is connected to the display unit for communication, the pneumatic device includes an air inlet pipe, the upper port of the air inlet pipe is fixedly connected to the lower end of the connecting port of the detection head, the other end of the air inlet pipe is connected to the pneumatic pressure pump, a fixed sleeve is sleeved on the outside of the air inlet pipe, an air inlet pipe extension port is opened on the side of the fixed sleeve near the lower end, a fixed seat is arranged at the lower end of the fixed sleeve, a fixed port is arranged at the center of the upper side of the fixed seat, a left fixed arc and a right fixed arc are arranged on the inner side of the upper end of the fixed sleeve, and the left fixed arc and the right fixed arc include a fixed arc and a fixed rod. The device uses a pneumatic pressure pump to pass compressed air into the detection head to achieve the pushing of the detection rod, and then exerts a force on the socks. This method has a limited force range and cannot be well applied to medical elastic stockings. At the same time, it is difficult for the compressed air to maintain a stable push during the process of pushing the detection rod, and position deviation is prone to occur, thereby reducing the accuracy of the detection. Summary of the invention

[0005] The purpose of the present invention is to overcome the existing method of indirectly measuring the compression force of medical elastic stockings, and to provide an elastic stocking tester and a direct pressure performance testing device for elastic stockings. The motor controls the movement of the lead screw nut, and the pressure sensor is combined to record the magnitude of the force applied to the socks, thereby achieving accurate measurement of the pressure of the elastic stockings.

[0006] The specific plan is as follows:

[0007] A compression stocking tester, comprising an upper bearing seat and a lower bearing seat arranged relatively parallel, a support rod fixedly connected between the upper bearing seat and the lower bearing seat, a lead screw movably connecting the upper bearing seat and the lower bearing seat, an upper lead screw nut is provided at the end of the lead screw close to the upper bearing seat, the upper lead screw nut is fixedly connected to a plurality of upper hinges, a lower lead screw nut is provided at the end of the lead screw close to the lower bearing seat, the lower lead screw nut is fixedly connected to a plurality of lower hinges, and the thread directions of the upper lead screw nut and the lower lead screw nut are opposite;

[0008] A plurality of pressure sensors are arranged along the circumference of the screw rod, the pressure sensing side of the pressure sensor is fixedly connected to the support plate, and the other side of the pressure sensor opposite to the support plate is respectively fixedly connected to the first hinge and the second hinge, wherein the first hinge is connected to the upper hinge through an upper support rod, and the second hinge is connected to the lower hinge through a lower support rod;

[0009] The free end of the screw rod passes through the lower bearing seat and is connected to the motor through a coupling. The lower bearing seat is fixedly connected to a connecting seat. The motor drives the screw rod to rotate, thereby driving the upper screw rod nut and the lower screw rod nut to move towards or in opposite directions. The sock support sleeve composed of the support plate is opened or tightened to change the stress state of the tested socks.

[0010] Furthermore, 3 to 6 pressure sensors are evenly distributed around the screw rod.

[0011] Furthermore, the plurality of upper hinges are symmetrically fixedly connected to the upper screw nuts with the screw as the central axis; and the plurality of lower hinges are symmetrically fixedly connected to the lower screw nuts with the screw as the central axis.

[0012] Furthermore, the central axes of the support plate and the pressure sensor coincide with each other.

[0013] Furthermore, the support plate is rectangular or square, and the pressure sensor is a cylindrical pressure sensor.

[0014] Furthermore, the connecting seat is conical, and the motor connecting seat for installing the motor and the motor are located in the conical cavity of the connecting seat, and the outer wall of the connecting seat is connected to a clamp for fixing the opening of the sock.

[0015] Furthermore, the connection seat is fixedly connected to a base, and the base is provided with a transparent cover for forming a closed test space.

[0016] Furthermore, the transparent cover is fixedly connected to the base, and the transparent cover is provided with a switchable test door.

[0017] The present invention also protects a device for testing the pressure performance of elastic stockings, comprising the elastic stockings tester.

[0018] Furthermore, the compression performance testing device for elastic stockings also includes a host computer, which is electrically connected to the elastic stocking tester to achieve drive control of the motor in the elastic stocking tester and collect test data of the pressure sensor.

[0019] Beneficial effects: The elastic socks tester provided by the present invention drives the lead screw to rotate through a motor, so as to drive the upper lead screw nut and the lower lead screw nut to move toward or in opposite directions, so that the support plate is opened or tightened, and can stably support the socks mounted on the support plate to make continuous deformation. The pressure on the socks during the change process is collected and recorded in real time by the pressure sensor, and the test of pressure changes is convenient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] Figure 1 It is a schematic structural diagram of a pressure performance testing device for elastic stockings provided in Embodiment 1 of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a compression stockings tester provided by Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the initial state structure of a compression stockings tester provided by Embodiment 1 of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the elastic stocking tester in the unfolded state provided by Embodiment 1 of the present invention. DETAILED DESCRIPTION

[0025] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be appreciated by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work, all belong to the scope of protection of the present invention. If the specific conditions are not indicated in the embodiments, they are carried out according to the normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not indicated in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] A device for testing the pressure performance of elastic stockings, such as Figure 1 As shown, it includes a placement platform 100, the elastic stocking tester 200 and the host computer 300 are arranged on the placement platform 100, the host computer 300 can be an existing computer, and the host computer 300 is electrically connected to the elastic stocking tester 200 to form a set of testing and data parallel input and output system.

[0030] refer to Figure 2 The elastic stocking tester 200 includes a base 201, a tester 202 and a transparent cover 203. The tester 202 is installed on the base 201 and covered by the transparent cover 203 to form a closed test space. Usually, elastic stockings need to be tested under a certain temperature and humidity environment, and the transparent cover 203 can form a test environment that meets the requirements. The transparent cover 203 can be a transparent plastic box with a closed top surface, which is inverted on the base 201 and opened when the sample to be tested is placed; it can also be fixedly installed on the base 201, and a test door 204 that can be opened and closed is designed on one side.

[0031] refer to Figure 3 and Figure 4 The elastic stocking tester further comprises an upper bearing seat 1 and a lower bearing seat 3 arranged relatively parallel to each other, a support rod 2 is fixedly connected between the upper bearing seat 1 and the lower bearing seat 3, and a screw rod 7 movably connects the upper bearing seat 1 and the lower bearing seat 3. In order to improve the stability of the device, two support rods 2 arranged relatively to each other are connected between the upper bearing seat 1 and the lower bearing seat 3.

[0032] The lower bearing seat 3 is fixedly connected to the connecting seat 4 located below the lower bearing seat 3. The connecting seat 4 is a hollow cone. A motor connecting seat 6 for fixing the motor 16 is provided in the conical cavity. A coupling 5 is provided on the top of the motor connecting seat 6. One end of the coupling 5 is connected to the output shaft of the motor 16, and the other end is connected to the screw 7.

[0033] The end of the screw rod 7 close to the upper bearing seat 1 is provided with an upper screw rod nut 8, and the upper screw rod nut 8 is fixedly connected to a plurality of upper hinges 9. The end of the screw rod 7 close to the lower bearing seat 3 is provided with a lower screw rod nut 15, and the lower screw rod nut 15 is fixedly connected to a plurality of lower hinges 10. The thread directions of the upper screw rod nut 8 and the lower screw rod nut 15 are opposite. The screw rod 7 passes through the free end of the lower bearing seat 3 and is connected to the coupling 5.

[0034] like Figure 4 As shown, six cylindrical pressure sensors 13 are symmetrically arranged along the circumference of the screw rod 7. The pressure sensors 13 are evenly distributed. The pressure sensing side of each pressure sensor 13 is fixedly connected to a rectangular support plate 14. The central axis of the support plate 14 and the pressure sensor 13 coincide with each other, so that the pressure sensor 13 can accurately adopt the pressure value on the support plate 14.

[0035] The other side of the pressure sensor 13 opposite to the support plate 14 is fixedly connected to the first hinge 11 and the second hinge 17 respectively, wherein the first hinge 11 is connected to the upper hinge 9 through an upper support rod 18, and the second hinge 17 is connected to the lower hinge 10 through a lower support rod 19. The opening and tightening of the support plate 14 are achieved through the above structure.

[0036] In order to improve the stability of the support plate during opening or tightening, the multiple upper hinges 9 are symmetrically fixedly connected to the upper screw nuts 8 with the screw rod 7 as the center axis; the multiple lower hinges 10 are symmetrically fixedly connected to the lower screw nuts 15 with the screw rod 7 as the center axis.

[0037] A motor 16 is arranged in the connecting seat 4 below the lower bearing seat 3, and the motor 16 drives the screw rod 7 to rotate, thereby driving the upper screw rod nut 8 and the lower screw rod nut 15 to move towards or in the opposite direction, and the sock support sleeve composed of the support plate 14 is opened or tightened to change the stress state of the tested socks.

[0038] The test process is described below: The initial state is as follows: Figure 3 As shown, at this time, the motor is not powered on, the support plate is tightened, the upper support rod and the lower support rod are parallel to the screw rod, the elastic stocking to be tested is put into the sleeve formed by the support plate, and the value of the pressure sensor is set to zero to prepare for starting the instrument.

[0039] Then, the motor is powered on. At this time, because the screw rod is a through shaft connected to the output shaft of the motor, and the upper screw nut at the upper end is right-handed and the lower screw nut at the lower end is left-handed, the upper screw nut and the lower screw nut will move at the same time. At this time, if the upper screw nut is controlled to move downward, the lower screw nut will move upward, and the support plate will be opened, similar to opening an umbrella. At the same time, the elastic stocking will be opened by the support plate. The pressure sensor will continuously display the force value at each state, and the data will be stored through the data acquisition device and displayed through the host computer. This movement will continue until the elastic force extreme value of the elastic stocking is opened and stops. After the value is taken or the maintenance time is completed, the motor will be controlled to run in the opposite direction. At this time, the upper screw nut is used upward, and the lower screw nut moves downward, and the elastic stocking returns to the previous state. Through repeated movement operations, the elastic stocking can be compared with the standard data according to the read data to determine whether its elastic performance meets the requirements.

[0040] Example 2

[0041] This embodiment is modified on the basis of the embodiment 1. In the embodiment 1, the 6 cylindrical pressure sensors 13 are symmetrically arranged along the circumference of the screw rod 7. In this embodiment, the number of pressure sensors is 3, and they are all symmetrically distributed around the screw rod as the central axis. Since the number of pressure sensors is reduced, the number of connecting parts is correspondingly reduced, thereby reducing the manufacturing cost of the equipment, and it is suitable for elasticity testing of socks with low elasticity requirements.

[0042] Example 3

[0043] This embodiment is modified on the basis of Embodiment 1. A clamp for fixing the opening of the sock is connected to the outer wall of the connecting seat 4. After the elastic sock to be tested is put into the sleeve formed by the support plate, the opening of the sock is clamped by the clamp. This can prevent the sock from loosening or even falling out of the sleeve after the sleeve is opened, thereby improving the efficiency and accuracy of the detection, and is suitable for testing scenarios of socks with longer lengths.

[0044] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0046] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A compression stockings tester, characterized in that: It comprises an upper bearing seat (1) and a lower bearing seat (3) which are arranged relatively parallel, a support rod (2) fixedly connected between the upper bearing seat (1) and the lower bearing seat (3), a screw (7) movably connecting the upper bearing seat (1) and the lower bearing seat (3), an upper screw nut (8) being provided at the end of the screw (7) close to the upper bearing seat (1), the upper screw nut (8) being fixedly connected to a plurality of upper hinges (9), a lower screw nut (15) being provided at the end of the screw (7) close to the lower bearing seat (3), the lower screw nut (15) being fixedly connected to a plurality of lower hinges (10), and the thread directions of the upper screw nut (8) and the lower screw nut (15) are opposite; A plurality of pressure sensors (13) are arranged along the circumference of the screw rod (7), the pressure sensing side of the pressure sensor (13) is fixedly connected to the support plate (14), and a first hinge (11) and a second hinge (17) are respectively fixed to the other side of the pressure sensor (13) opposite to the support plate (14), wherein the first hinge (11) is connected to the upper hinge (9) via an upper support rod (18), and the second hinge (17) is connected to the lower hinge (10) via a lower support rod (19); The screw rod (7) passes through the free end of the lower bearing seat (3) and is connected to the motor (16) through a coupling (5). The lower bearing seat (3) is fixedly connected to a connecting seat (4). The motor (16) drives the screw rod (7) to rotate, thereby driving the upper screw rod nut (8) and the lower screw rod nut (15) to move towards or in opposite directions. The sock support sleeve formed by the support plate (14) is opened or tightened to change the stress state of the tested socks.

2. The elastic stocking tester according to claim 1, characterized in that: Three to six pressure sensors (13) are evenly distributed around the screw rod (7).

3. The elastic stockings tester according to claim 2, characterized in that: The plurality of upper hinges (9) are symmetrically fixedly connected to the upper screw nuts (8) with the screw (7) as the central axis; the plurality of lower hinges (10) are symmetrically fixedly connected to the lower screw nuts (15) with the screw (7) as the central axis.

4. The elastic stocking tester according to any one of claims 1 to 3, characterized in that: The central axes of the support plate (14) and the pressure sensor (13) coincide with each other.

5. The elastic stocking tester according to claim 4, characterized in that: The support plate (14) is rectangular or square, and the pressure sensor (13) is a cylindrical pressure sensor.

6. The elastic stocking tester according to any one of claims 1 to 3, characterized in that: The connecting seat (4) is conical, and the motor connecting seat (6) for mounting the motor (16) and the motor (16) are located in the conical cavity of the connecting seat (4), and the outer wall of the connecting seat (4) is connected to a clamp for fixing the opening of the sock.

7. The elastic stocking tester according to claim 6, characterized in that: The connecting seat (4) is fixedly connected to a base (201), and the base (201) is provided with a transparent cover (203) for forming a closed test space.

8. The elastic stocking tester according to claim 7, characterized in that: The transparent cover (203) is fixedly connected to the base (201), and the transparent cover (203) is provided with a test door (204) that can be opened and closed.

9. A device for testing the pressure performance of elastic stockings, comprising the elastic stocking tester according to any one of claims 1 to 8.

10. The pressure performance testing device for elastic stockings according to claim 9, characterized in that: It also comprises a host computer (300), which is electrically connected to the elastic stocking tester to realize drive control of the motor in the elastic stocking tester and collect test data of the pressure sensor.

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