In vivo testing equipment for dynamic measurement of mechanical properties of skin materials

Abstract

The present invention provides an in-body detection device for dynamically measuring the mechanical properties of skin materials, which has the following characteristics: a horizontal reciprocating tensile stress-strain detection unit, which is used to contact the surface of the skin to be tested and detect displacement data and tensile pressure data, and the horizontal reciprocating tensile stress-strain detection unit includes at least two contact heads; a driving unit, which is used to drive the contact head to move, and the driving unit includes a driving motor that outputs reciprocating linear motion perpendicular to the surface of the skin to be tested; and a reversing unit, which is used to convert the reciprocating linear motion into a horizontal reciprocating tensile motion of the contact head on the surface of the skin to be tested, wherein the reversing unit includes at least one right-angle reversing rod, and the right-angle reversing rod is used to connect the driving unit and the horizontal reciprocating tensile stress-strain detection unit. In short, the present method can be used to evaluate the dynamic characteristics of the skin.

Description

Technical Field

[0001] The invention relates to an in-body detection device, in particular to an in-body detection device for dynamically measuring the mechanical properties of skin materials. Background Art

[0002] The mechanical properties of skin can be tested using a variety of techniques, which can be mainly divided into two categories: ex vivo and in vivo.

[0003] For in vitro experiments, the skin to be tested is usually removed from a living body or replaced by imitation skin made of animal tissue, gelatin and polyurethane. The mechanical properties of the skin measured in this way are not only different from those of the skin in its natural state, but may also be ethically controversial. For in vivo experiments, it is non-destructive, which ensures the reliability, repeatability and availability of samples. Experimental techniques such as indentation, torsion, stretching, suction, dynamic testing and optical methods can be used to characterize the mechanical properties of the skin.

[0004] In classical material mechanics, viscoelasticity is usually characterized by dynamic mechanical analysis, which involves applying small cyclic strains to a sample and measuring the resulting stress response. Therefore, direct measurements of periodicity and continuity are essential if this principle technology is to be applied to testing living tissue. Existing skin mechanical testing equipment focuses mainly on measuring skin elasticity and the mechanical properties of the skin at quasi-static strain rates, and is not specifically designed to evaluate the dynamic properties of the skin.

[0005] In addition, existing in-body detection devices have the problem of being large and difficult to carry and use. Summary of the invention

[0006] The present invention is made to solve the above-mentioned problem, and aims to provide an in-body detection device for dynamically measuring the mechanical properties of skin materials.

[0007] The present invention provides an in-body detection device for dynamically measuring the mechanical properties of skin materials, having the following characteristics, including: a horizontal reciprocating tensile stress-strain detection unit, used to contact the surface of the skin to be tested and detect displacement data and tensile pressure data, the horizontal reciprocating tensile stress-strain detection unit comprising at least two contact heads; a driving unit, used to drive the contact head to move, the driving unit comprising a driving motor that outputs reciprocating linear motion perpendicular to the surface of the skin to be tested; and a reversing unit, used to convert the reciprocating linear motion into horizontal reciprocating tensile motion of the contact head on the surface of the skin to be tested, wherein the reversing unit comprises at least one right-angle reversing rod, and the right-angle reversing rod is used to connect the driving unit and the horizontal reciprocating tensile stress-strain detection unit.

[0008] In the in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein, the driving motor has an output shaft that outputs reciprocating linear motion along a first direction, the right-angle reversing rod is composed of a first rod portion and a second rod portion that are perpendicular to each other and connected at their ends, the end of the first rod portion away from the second rod portion is rotatably connected to the end of the output shaft, and the reversing unit also includes: a first steering limiting slide rail, extending along a second direction having a certain angle with the first direction; a first steering limiting slider, slidably arranged on the first steering limiting slide rail, and rotatably connected to the connecting part between the first rod portion and the second rod portion; a second steering limiting slide rail, extending along a third direction perpendicular to the first direction; a second steering limiting slider, slidably arranged on the second steering limiting slide rail, and rotatably connected to the end of the second rod portion away from the first rod portion.

[0009] In the in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein, the reversing unit also includes a first rotating connection assembly for connecting the second steering limiting slider and the end of the second rod portion away from the first rod portion, and the number of contact heads is two, and the horizontal reciprocating tensile stress-strain detection unit also includes: a detection slider, slidably set on the second steering limiting slide rail; a contact head mounting plate, used to install two contact heads set along the first direction, the two contact heads are parallel to each other and are located at the same height plane; a tension and pressure sensor, used to detect tension and pressure data generated along a third direction; a detection connecting piece, fixedly set on the detection slider, used to connect the contact head mounting plate and one end of the tension and pressure sensor; a displacement sensor, used to detect displacement data, and its shell is set along the third direction; a displacement sensor mounting frame, set next to the detection connecting piece, used to fix the shell, the other end of the tension and pressure sensor is fixedly connected to the second steering limiting slider, and the moving core of the displacement sensor is connected to the detection connecting piece.

[0010] The in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention may also have the following features: wherein the driving motor has an output shaft that outputs reciprocating linear motion along a first direction, the reversing unit includes two right-angle reversing rods, recorded as a first right-angle reversing rod and a second right-angle reversing rod, the right-angle reversing rods are composed of a first rod portion and a second rod portion that are perpendicular to each other and connected at their ends, an end of the first rod portion of the first right-angle reversing rod away from the second rod portion and an end of the first rod portion of the second right-angle reversing rod away from the second rod portion are respectively rotatably connected to the end of the output shaft, the reversing unit also includes: a first steering limiting slide rail, extending along a second direction having a certain angle with the first direction; a first steering limiting slider, slidably arranged on the first steering limiting slide rail, And it is rotationally connected with the connecting part between the first rod portion and the second rod portion of the first right-angle reversing rod; the second steering limiting slide rail extends along a third direction perpendicular to the first direction; the second steering limiting slider is slidably arranged on the second steering limiting slide rail and is rotationally connected with the end of the second rod portion of the first right-angle reversing rod away from the first rod portion; the third steering limiting slide rail extends along a fourth direction having a certain angle with the first direction; the third steering limiting slider is slidably arranged on the third steering limiting slide rail and is rotationally connected with the connecting part between the first rod portion and the second rod portion of the second right-angle reversing rod; the fourth steering limiting slider is slidably arranged on the second steering limiting slide rail and is rotationally connected with the end of the second rod portion of the second right-angle reversing rod away from the first rod portion.

[0011] In the in-vivo detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein the reversing unit also includes a first rotating connection assembly for connecting the second steering limiting slider and the second rod portion of the first right-angle reversing rod at one end away from the first rod portion, and a second rotating connection assembly for connecting the fourth steering limiting slider and the second right-angle reversing rod at one end away from the first rod portion. The horizontal reciprocating tensile stress-strain detection unit includes two contact heads, recorded as the first contact head and the second contact head. The horizontal reciprocating tensile stress-strain detection unit also includes: a first detection slider, slidably set on the second steering limiting slide rail; a first contact head mounting plate, used to mount the first contact head set along the first direction; a first tension and pressure sensor, used to detect the tension and pressure data generated by the first contact head along the third direction; a first detection connector, fixedly set on the first detection slider, used to connect the first contact head mounting plate and one end of the first tension and pressure sensor; a first displacement sensor, used to detect the displacement data of the first contact head, and its shell is set along the third direction; A displacement sensor mounting frame is arranged beside the first detection connecting piece and is used to fix the shell of the first displacement sensor; a second detection slider is slidably arranged on the second steering limiting slide rail; a second contact head mounting plate is used to mount the second contact head arranged along the first direction; a second tension and pressure sensor is used to detect the tension and pressure data generated by the second contact head along the third direction; a second detection connecting piece is fixedly arranged on the second detection slider and is used to connect the second contact head mounting plate and one end of the second tension and pressure sensor; the second displacement sensor is used to detect the displacement data of the second contact head, and its shell is arranged along the third direction; a second displacement sensor mounting frame is arranged beside the second detection connecting piece and is used to fix the shell of the second displacement sensor, the other end of the first tension and pressure sensor is fixedly connected to the second steering limiting slider, the moving core of the first displacement sensor is connected to the first detection connecting piece, the other end of the second tension and pressure sensor is fixedly connected to the fourth steering limiting slider, the moving core of the second displacement sensor is connected to the second detection connecting piece, and the first contact head and the second contact head are parallel to each other and located at the same height plane.

[0012] In the in-vivo detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein, the reversing unit also includes a first connecting plate fixedly connected to the end of the first rod portion of the first right-angle reversing rod away from the second rod portion, and a second connecting plate fixedly connected to the end of the first rod portion of the second right-angle reversing rod away from the second rod portion, the driving unit also includes a driving connection assembly, the driving connection assembly includes a connecting shaft, and a first fastener, a first driving connecting member, a first positioning sleeve, a first bearing cover plate, a first bearing, a shaft ring, a second bearing, a second bearing cover plate, a second positioning sleeve, a second driving connecting member and a second fastener sequentially sleeved on the connecting shaft, the first connecting plate is provided with a through hole for embedding the first bearing, the second connecting plate is provided with a through hole for embedding the second bearing, one end of the first driving connecting member is provided with a through hole for sleeved on the connecting shaft, the other end of the first driving connecting member is connected to the output shaft, one end of the second driving connecting member is provided with a through hole for sleeved on the connecting shaft, and the other end of the second driving connecting member is connected to the output shaft.

[0013] In the in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein, the driving unit also includes: a driving limiting slide rail, extending along the first direction and arranged below the output shaft; a driving limiting slider, slidingly arranged on the driving limiting slide rail; an L-shaped driving connecting plate, fixedly arranged on the driving limiting slider, for connecting the output shaft, and the other end of the first driving connecting member and the other end of the second driving connecting member; a fixed bracket, fixedly connected to the bottom of the housing of the driving motor.

[0014] In the in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein, the first fastener and the second fastener are locking nuts, or double nuts, or on the basis of the single nut, a double-ear stop washer or Nord-Lock or a thread locking agent is used for further locking.

[0015] In the in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention, it can also have the following characteristics: wherein, the vertical effective right-angle side lengths corresponding to the first rod portion and the second rod portion of the right-angle reversing rod are respectively the first preset length and the second preset length, and through the first preset length, the second preset length and the angle, the displacement of the contact head and the displacement of the output shaft are in a fixed geometric numerical relationship.

[0016] The in-body detection device for dynamically measuring the mechanical properties of skin materials provided by the present invention may also have the following characteristics: wherein the angle is 45 degrees, and the first preset length and the second preset length are equal, so that the displacement of the contact head is equal to the displacement of the output shaft.

[0017] Functions and Effects of the Invention

[0018] According to the in-body detection device for dynamically measuring the mechanical properties of skin materials involved in the present invention, the reciprocating linear motion of the driving motor perpendicular to the surface of the skin to be measured is converted into the horizontal reciprocating tensile motion of the contact head on the surface of the skin to be measured by the right-angle reversing rod, thereby realizing the measurement of the mechanical properties of the skin material. Therefore, the in-body detection device for dynamically measuring the mechanical properties of skin materials of the present invention can be used to evaluate the dynamic characteristics of the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an in-body detection device for dynamically measuring the mechanical properties of skin materials in an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the driving unit in the embodiment of the present invention.

[0021] Figure 3 is an exploded view of a drive connection assembly in an embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the structure of the reversing unit in the embodiment of the present invention.

[0023] Figure 5 is an exploded view of the first position-limiting connection assembly in an embodiment of the present invention.

[0024] Figure 6 is an exploded view of the first rotating connection assembly in an embodiment of the present invention.

[0025] Figure 7 Schematic diagram of the structure of a horizontal reciprocating tensile stress-strain detection unit in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments and accompanying drawings specifically illustrate the in-vivo detection device for dynamically measuring the mechanical properties of skin materials of the present invention.

[0027] Figure 1 Schematic diagram of the structure of an in-body detection device for dynamically measuring the mechanical properties of skin materials in an embodiment of the present invention.

[0028] like Figure 1 As shown, the in-body detection device 100 for dynamically measuring the mechanical properties of skin materials includes a base plate 10 , a driving unit 20 , a switching unit 30 and a horizontal reciprocating tensile stress-strain detection unit 40 .

[0029] Figure 2 Schematic diagram of the structure of the driving unit in the embodiment of the present invention.

[0030] like Figure 2 As shown, the driving unit 20 includes a driving motor 201 , a driving limiting slide rail 202 , a driving limiting slider 203 , an L-shaped driving connecting plate 204 , a fixing bracket 205 and a driving connecting assembly 206 .

[0031] The driving motor 201 includes a housing 2011 and an output shaft 2012 that outputs reciprocating linear motion in a first direction, i.e., perpendicular to the surface of the skin to be tested. In this embodiment, the driving motor 201 is a voice coil motor, and the output shaft 2012 has a forward and backward displacement range of ±5 mm and a periodic frequency of no more than 100 Hz.

[0032] The drive limiting rail 202 extends along the first direction and is disposed below the output shaft 2012 and fixedly connected to the bottom plate 10. In this embodiment, a positioning groove is preset on the bottom plate 10 for placing the drive limiting rail 202, and the drive limiting rail 202 is fixedly connected to the bottom plate 10 by screws.

[0033] The driving limiting slider 203 is slidably disposed on the driving limiting slide rail 202 .

[0034] One side of the L-shaped driving connection plate 204 is fixedly arranged on the driving limiting slider 203, and the other side of the L-shaped driving connection plate 204 is fixedly connected to the output shaft 2012. In this embodiment, threaded holes are respectively arranged on the two sides of the L-shaped driving connection plate 204, and are respectively fixedly connected to the output shaft 2012 and the driving limiting slider 203 by screws. In this embodiment, the output trajectory of the output shaft 2012 is corrected by the driving limiting slide rail 202, the driving limiting slider 203 and the L-shaped driving connection plate 204, so that it can accurately reciprocate linearly along the first direction.

[0035] The fixing bracket 205 is disposed on the bottom plate 10 and fixedly connected to the bottom of the housing 2011 .

[0036] Figure 3 is an exploded view of a drive connection assembly in an embodiment of the present invention.

[0037] like Figure 3 As shown, the drive connection assembly 206 includes a connecting shaft 20601, and a first fastener 20602, a first drive connection member 20603, a first positioning sleeve 20605, a first bearing cover plate 20604, a first bearing 20606, a collar 20607, a second bearing 20608, a second bearing cover plate 20610, a second positioning sleeve 20609, a second drive connection member 20611 and a second fastener 20612, which are sequentially sleeved on the connecting shaft 20601. In this embodiment, the collar 20607 is integrally formed with the connecting shaft 20601.

[0038] One end of the first driving connector 20603 is provided with a through hole for sleeved on the connecting shaft 20601, and the other end of the first driving connector 20603 is fixedly connected to the L-shaped driving connecting plate 204. One end of the second driving connector 20611 is provided with a through hole for sleeved on the connecting shaft 20601, and the other end of the second driving connector 20611 is fixedly connected to the L-shaped driving connecting plate 204.

[0039] The first fastener 20602 and the second fastener 20612 are locking nuts, or double nuts, or on the basis of a single nut, a double-ear retaining washer or Nord-Lock or a drip-applied thread locking agent is used for further locking.

[0040] Figure 4 Schematic diagram of the structure of the reversing unit in the embodiment of the present invention.

[0041] like Figure 4 As shown, the reversing unit 30 includes a first right-angle reversing rod 3001, a first connecting plate 3002, a first steering limiting slide rail 3003, a first steering limiting slider 3004, a first position-limiting connection assembly 3005, a second steering limiting slide rail 3006, a second steering limiting slider 3007, a first rotation connection assembly 3008, a second right-angle reversing rod 3009, a second connecting plate 3010, a third steering limiting slide rail 3011, a third steering limiting slider 3012, a second position-limiting connection assembly 3013, a fourth steering limiting slider 3014, and a second rotation connection assembly 3015. In this embodiment, the first right-angle reversing rod 3001 and the second right-angle reversing rod 3009 have the same thickness and are located at the same plane height, so as to minimize possible data errors.

[0042] The first right angle reversing rod 3001 is composed of a first rod portion 30011 and a second rod portion 30012 which are perpendicular to each other and connected at the ends. In this embodiment, the first rod portion 30011 and the second rod portion 30012 are integrally formed to form the first right angle reversing rod 3001.

[0043] One end of the first connecting plate 3002 is fixedly connected to one end of the first rod portion 30011 of the first right-angle reversing rod 3001 away from the second rod portion 30012, and the other end is provided with a through hole for embedding the first bearing 20606, so that the first connecting plate 3002 is rotatably connected to the output shaft 2012. In this embodiment, the upper surface of the first connecting plate 3002 is flush with the upper surface of the first rod portion 30011, and the thickness of the first connecting plate 3002 is half the thickness of the first rod portion 30011. In this embodiment, the first bearing 20606 is a flange bearing, and the shaft rings at both ends have different diameters, so the through hole on the first rod portion is a stepped hole that matches the diameter of the corresponding shaft ring.

[0044] In this embodiment, after the shaft ring on the larger diameter side of the first bearing 20606 is embedded in the first connecting plate 3002, the shaft ring is slightly higher than the surface of the first connecting plate. A through hole is provided on the first bearing cover plate 20604, and the through hole is large enough to pass through the first positioning sleeve 20605, but cannot pass through the shaft ring of the first bearing 20606, so that the first bearing cover plate 20604 is fixedly connected to the first connecting plate 3002 by screws, so that the first bearing 20606 is fixedly connected to the first connecting plate 3002. In this embodiment, the first bearing cover plate 20604 is rhombus-shaped, so that the screws fixing the first bearing cover plate 20604 do not interfere with the various moving connecting parts. In each rotating connection structure using a bearing in this embodiment, a sleeve, a bearing cover plate and a stepped hole with the same settings as above are used, and will not be repeated later, wherein the shape of the bearing cover plate is adaptively adjusted according to the movement trajectory of the part, so that the bearing cover plate does not interfere with the movement of the corresponding connecting part.

[0045] The first steering limiting slide rail 3003 extends along a second direction having a certain angle with the first direction, and is fixedly arranged on the bottom plate 10. In this embodiment, the preferred range of the angle is 44.5 to 45.5 degrees. In this embodiment, a positioning groove is preset on the bottom plate 10 for placing the first steering limiting slide rail 3003, and the first steering limiting slide rail 3003 is fixedly connected to the bottom plate 10 by a screw.

[0046] The first steering limiting slider 3004 is slidably disposed on the first steering limiting slide rail 3003 .

[0047] Figure 5 is an exploded view of the first position-limiting connection assembly in an embodiment of the present invention.

[0048] like Figure 5 As shown, the first limiting connection assembly 3005 includes a first connection seat 30051 , a third bearing 30052 , a third bearing cover plate (not shown in the figure), a third positioning sleeve 30053 and a third fastener 30054 .

[0049] The first connection seat 30051 includes a base portion 300511 fixedly connected to the first steering limiting slider 3004 and a columnar portion 300512 fixed at one end to the base portion 300511. In this embodiment, the base portion 300511 and the columnar portion 300512 are integrally formed to form the first connection seat 30051.

[0050] The third positioning sleeve 30053 is embedded in the through hole of the connecting portion between the first rod portion 30011 and the second rod portion 30012 , that is, the third positioning sleeve 30053 is arranged at a right angle to the first right-angle reversing rod 3001 through the through hole.

[0051] The third bearing 30052, the third bearing cover plate, the third positioning sleeve 30053 and the third fastener 30054 are sequentially sleeved on the columnar portion 300512. The diameter of the upper portion of the columnar portion 300512 is smaller than the diameter of the lower portion of the columnar portion 300512, and the inner diameter of the third bearing 30052 is smaller than the diameter of the lower portion of the columnar portion 300512, and the outer diameter of the lower portion of the third bearing 30052 is larger than the diameter of the lower portion of the columnar portion 300512, so that the first right angle reversing rod 3001 is fixed at a certain height and is rotatably connected to the first steering limiting slider 3004.

[0052] The second steering limiting slide rail 3006 extends along a third direction perpendicular to the first direction and is fixedly disposed on the bottom plate 10. In this embodiment, a positioning groove is preset on the bottom plate 10 for placing the second steering limiting slide rail 3006, and the second steering limiting slide rail 3006 is fixedly connected to the bottom plate 10 by screws.

[0053] The second steering limiting slider 3007 is slidably disposed on the second steering limiting slide rail 3006 .

[0054] Figure 6 is an exploded view of the first rotating connection assembly in an embodiment of the present invention.

[0055] like Figure 6 As shown, the first rotating connection assembly 3008 includes a second connection seat 30081 , a connection column 30082 , a fourth bearing 30083 , a fourth bearing cover plate 30084 , a fourth positioning sleeve 30085 and a fourth fastener 30086 .

[0056] The second connecting seat 30081 is fixedly connected to the second steering limiting slider 3007 . The second connecting seat 30081 is L-shaped, and a hole is provided on one side of the L-shape for inserting the connecting column 30082 .

[0057] The diameter of the upper part of the connecting column 30082 is smaller than the diameter of the lower part of the connecting column 30082, and the lower part is provided with a groove. In this embodiment, the side of the second connecting seat 30081 provided with the hole is also provided with a fixing hole with a thread. After the connecting column 30082 is inserted into the second connecting seat 30081, the bolt abuts against the groove through the fixing hole, so that the connecting column 30082 is fixedly connected to the second connecting seat 30081.

[0058] The fourth bearing 30083, the fourth bearing cover plate 30084, the fourth positioning sleeve 30085 and the fourth fastener 30086 are sequentially sleeved on the connecting column 30082, and the inner diameter of the fourth bearing 30083 is smaller than the diameter of the lower part of the connecting column 30082, and the outer diameter of the lower part of the fourth bearing 30083 is larger than the diameter of the lower part of the connecting column 30082, so that the first right angle reversing rod 3001 is fixed at a certain height and is rotatably connected to the second steering limiting slider 3007. In this embodiment, by adjusting the height of the intersection of the upper and lower parts of the columnar portion 300512 and the upper and lower parts of the connecting column 30082, the entire first right angle reversing rod 3001 is maintained at the same horizontal plane.

[0059] The second connecting plate 3010 is fixedly connected to one end of the second right-angle reversing rod 3009 close to the driving unit 20. In this embodiment, the lower surface of the second connecting plate 3010 is flush with the lower surface of the second right-angle reversing rod 3009, and the thickness of the second connecting plate 3010 is half the thickness of the second right-angle reversing rod 3009. When the first right-angle reversing rod 3001 and the second right-angle reversing rod 3009 are connected together by the driving connection assembly 206, the first right-angle reversing rod 3001 and the second right-angle reversing rod 3009 are in the same horizontal plane.

[0060] The second right-angle reversing rod 3009, the third steering limiting slide rail 3011, the third steering limiting slider 3012, the second limit connection assembly 3013, the fourth steering limiting slider 3014 and the second rotating connection assembly 3015 correspond one to one with the first right-angle reversing rod 3001, the first steering limiting slide rail 3003, the first steering limiting slider 3004, the first limit connection assembly 3005, the second steering limiting slider 3007 and the first rotating connection assembly 3008 respectively, and are mirror-imaged along the first direction, and the specific structure will not be repeated.

[0061] Figure 7 Schematic diagram of the structure of a horizontal reciprocating tensile stress-strain detection unit in an embodiment of the present invention.

[0062] like Figure 7 As shown, the horizontal reciprocating tensile stress-strain detection unit 40 includes a first detection slider 4001, a first detection connector 4002, a first contact head mounting plate 4003, a first contact head 4004, a first tension and pressure sensor 4005, a first displacement sensor mounting bracket 4006, a first displacement sensor 4007, a second detection slider 4008, a second detection connector 4009, a second contact head mounting plate 4010, a second contact head 4011, a second tension and pressure sensor 4012, a second displacement sensor mounting bracket 4013 and a second displacement sensor 4014.

[0063] The first detection slider 4001 is slidably disposed on the second steering limiting slide rail 3006 .

[0064] The first detection connecting member 4002 includes a first detection connecting sub-member 40021 and a second detection connecting sub-member 40022. The first detection connecting sub-member 40021 and the second detection connecting sub-member 40022 are both L-shaped plates consisting of two mutually perpendicular straight plate portions. One straight plate portion of the first detection connecting sub-member 40021 is fixedly arranged on the first detection slider 4001, and the side surface of the straight plate portion is fixedly connected to one straight plate portion of the second detection connecting sub-member 40022.

[0065] The first contact head mounting plate 4003 is an L-shaped plate composed of two mutually perpendicular straight plate parts. One straight plate part of the first contact head mounting plate 4003 is fixedly connected to the straight plate part of the first detection connecting sub-component 40021 fixedly arranged on the first detection slider 4001, and the other straight plate part is provided with a through hole, so that the first contact head 4004 is fixedly connected to the first contact head mounting plate 4003 arranged along the first direction through the through hole.

[0066] One end of the first tension and pressure sensor 4005 is fixedly connected to the first detection connection sub-component 40021 by means of threaded fastening through a through hole on the straight plate portion of the first detection connection sub-component 40021, and the other end is fixedly connected to the second connection seat 30081 by means of threaded fastening through a through hole on a side of the second connection seat 30081 away from the connection column 30082. The straight plate portion of the first detection connection sub-component 40021 is not fixedly connected to the first detection slider 4001. The first tension and pressure sensor 4005 is used to detect the tension and pressure data generated by the first contact head 4004 along the third direction.

[0067] The first displacement sensor mounting bracket 4006 is disposed beside the first detection connecting member 4002 and is fixedly connected to the bottom plate 10 for fixing the housing of the first displacement sensor 4007 , which is disposed along the third direction.

[0068] The first displacement sensor 4007 is used to detect the displacement data of the first contact head 4004. Its moving core passes through the through hole provided on the straight plate portion of the second detection connecting sub-component 40022 and is fixedly connected to the second detection connecting sub-component 40022 by screws. The straight plate portion of the second detection connecting sub-component 40022 is not connected to the first detection connecting sub-component 40021.

[0069] The second detection slider 4008 is slidably disposed on the second steering limiting slide rail 3006 .

[0070] The second detection connecting member 4009 includes a third detection connecting member 40091 and a fourth detection connecting member 40092. The third detection connecting member 40091 and the fourth detection connecting member 40092 are both L-shaped plates consisting of two mutually perpendicular straight plate portions. A straight plate portion of the third detection connecting member 40091 is fixedly arranged on the second detection slider 4008, and the side surface of the straight plate portion is fixedly connected to a straight plate portion of the fourth detection connecting member 40092.

[0071] The second contact head mounting plate 4010 is an L-shaped plate composed of two mutually perpendicular straight plate parts. One straight plate part of the second contact head mounting plate 4010 is fixedly connected to the straight plate part of the third detection connecting sub-component 40091 fixedly arranged on the second detection slider 4008, and the other straight plate part is provided with a through hole, so that the second contact head 4011 is fixedly connected to the second contact head mounting plate 4010 arranged along the first direction through the through hole.

[0072] One end of the second tension and pressure sensor 4012 is fixedly connected to the third detection connection sub-component 40091 by means of threaded fastening through the through hole on the straight plate portion of the third detection connection sub-component 40091, and the other end is fixedly connected to the second rotation connection component 3015 by means of threaded fastening through the through hole on the second rotation connection component 3015. The straight plate portion of the third detection connection sub-component 40091 is not fixedly connected to the second detection slider 4008. The second tension and pressure sensor 4012 is used to detect the tension and pressure data generated by the second contact head 4011 along the third direction. In this embodiment, the plane of the bottom of the screw near the welding seam of the first tension and pressure sensor 4005 and the second tension and pressure sensor 4012 is directly attached to the parts beside it, and a certain gap is reserved between the plane of the bottom of the screw far from the welding seam and the parts beside it, and they are not directly attached.

[0073] The second displacement sensor mounting bracket 4013 is disposed beside the second detection connecting member 4009 and is fixedly connected to the bottom plate 10 for fixing the housing of the second displacement sensor 4014 , which is disposed along the third direction.

[0074] The second displacement sensor 4014 is used to detect the displacement data of the second contact head 4011, and its moving core passes through the through hole set on the straight plate portion of the fourth detection connecting sub-component 40092, and is fixedly connected to the fourth detection connecting sub-component 40092 by screws. The straight plate portion of the fourth detection connecting sub-component 40092 is not connected to the third detection connecting sub-component 40091. In this embodiment, since the displacement generated by the first contact head 4004 and the second contact head 4011 is the same, only the second displacement sensor 4014 or the first displacement sensor 4007 can be retained as needed, and the displacement collected by the retained displacement sensor is used as the displacement generated by any contact head.

[0075] The first contact head 4004 and the second contact head 4011 are parallel to each other and are located at the same height plane. In this embodiment, the first contact head 4004 and the second contact head 4011 are both in contact with the surface of the skin to be tested through an adsorption head with a diameter of 8 mm, and the initial spacing between the adsorption head center of the first contact head 4004 and the adsorption head center of the second contact head 4011 is 25 mm.

[0076] The lengths of the vertical effective right-angle sides corresponding to the two rods of the first right-angle reversing rod 3001 and the second right-angle reversing rod 3009 are respectively the first preset length and the second preset length. Through the first preset length, the second preset length and the included angle, the displacement of the first contact head 4004 and the second contact head 4011 are both in a fixed geometric numerical relationship with the displacement of the output shaft 2012. For example, the displacement of the first contact head 4004 and the second contact head 4011 are both in a relationship of approximately 1 times the displacement of the output shaft 2012. In this embodiment, the included angle is 45 degrees, and the first preset length and the second preset length are equal to 8 cm, so that the displacement of the first contact head 4004 and the second contact head 4011 are both approximately equal to the displacement of the output shaft 2012. In this embodiment, when the included angle is 45 degrees, the range of the included angle between the second rod portion 30012 and the second steering limiting slide rail 3006 during movement is 86.52 to 93.7 degrees. Through the above arrangement, the overall length and width of the in-body detection device 100 for dynamically measuring the mechanical properties of skin materials in this embodiment are both 20 cm, and the height is 8 cm, thereby effectively achieving portability.

[0077] The following describes a process of dynamically measuring the mechanical properties of skin materials on the facial skin of a subject using the in-body detection device 100 for dynamically measuring the mechanical properties of skin materials.

[0078] In the measurement preparation stage, the subject sits on a chair, with the body close to the head fixing brace fixed on the table, the forehead is against the arc frame at the top of the head fixing brace, the chin is against the chin rest, facing forward, and remains motionless. The head fixing brace can be adjusted in size and height according to the actual situation of the subject. In addition, the subject's tested part needs to be shaved and cleaned to remove grease and mark the tested part, and then the first contact head 4004 and the second contact head 4011 are aligned with the mark in parallel, and slowly fit and fixed with the facial skin, and after fixing, the surface of the skin to be tested does not produce too many wrinkles, that is, the surface of the skin to be tested is still in a natural state, and the mechanical properties of the skin in the natural state can be obtained. Finally, the position of the base plate 10 is fixed by an electromagnet to obtain an initial state to ensure that the test is carried out in a stable state. In this initial state, the two right-angle rods of the first right-angle reversing rod 3001 and the second right-angle reversing rod 3009 are strictly parallel to the two sides of the base plate 10 respectively. In this embodiment, the first contact head 4004 and the second contact head 4011 are both vacuum suction cups, and the suction cups are adsorbed on the skin surface by adjusting the suction force of the vacuum pump. In other embodiments, the first contact head 4004 and the second contact head 4011 can be rigid planes, and the rigid planes are bonded to the skin surface with a non-biotoxic and easy-to-clean adhesive.

[0079] In the test phase, the output shaft 2012 of the driving motor 201 performs reciprocating linear motion along the first direction, i.e., continuous sinusoidal periodic motion forward and backward, and performs reversal through the reversing unit 30, so that the first contact head 4004 and the second contact head 4011 simultaneously move toward each other in a third direction perpendicular to the first direction, for example, when the first contact head 4004 moves to the right, the second contact head 4011 moves to the left, and the influence of the subcutaneous tissue is offset by the opposite motion, so that the properties of the living skin can be characterized separately, and the displacement of the first contact head 4004 and the second contact head 4011 is approximately the same as the displacement of the output shaft 2012. In this process, periodic stress-strain data are obtained through the first tension and pressure sensor 4005, the first displacement sensor 4007, the second tension and pressure sensor 4012, and the second displacement sensor 4014, and the obtained periodic data are analyzed by the classical DMA method, so as to obtain the tangential stress-strain mechanical properties of the skin.

[0080] In this embodiment, the first right-angle reversing rod 3001, the second right-angle reversing rod 3009 and the output shaft 2012 of the driving motor 201 are connected through the driving connection assembly 206, and the first right-angle reversing rod 3001 and the second right-angle reversing rod 3009 are located at the same height plane. Through the reciprocating motion of the output shaft 2012 along the first direction, the first right-angle reversing rod 3001 drives the first contact head 4004 slidably connected to the second steering limiting slide rail 3006 to reciprocate along the third direction perpendicular to the first direction, and the second right-angle reversing rod 3009 drives the second contact head 4011 slidably connected to the second steering limiting slide rail 3006 to reciprocate along the third direction. During the reciprocating motion, the first contact head 4004 and the second contact head 4011 move toward each other with the same displacement, thereby offsetting the influence of the subcutaneous tissue, and then the tensile pressure and displacement data collected by the first tensile pressure sensor 4005, the first displacement sensor 4007, the second tensile pressure sensor 4012 and the second displacement sensor 4014 are used to individually characterize the properties of the living skin.

[0081] <Example 2>

[0082] For the convenience of expression, in this embodiment, the same symbols are given to the same structures as those in the first embodiment, and the same descriptions are omitted.

[0083] The structures of the driving motor 201, the driving limiting slide rail 202, the driving limiting slider 203, the L-shaped driving connecting plate 204 and the fixing bracket 205 of the driving unit 20 in this embodiment are the same as those in the first embodiment and will not be described again.

[0084] The drive connection assembly 206 of this embodiment includes a connection shaft 20601, and a first fastener 20602, a first drive connection member 20603, a first positioning sleeve 20605, a first bearing cover plate 20604, a first bearing 20606, a collar 20607, a second drive connection member 20611, and a second fastener 20612, which are sequentially sleeved on the connection shaft 20601. In this embodiment, the thickness of the collar 20607 is adjusted to tightly fix the various parts of the drive connection assembly 206 together. In this embodiment, the collar 20607 is integrally formed with the connection shaft 20601.

[0085] In this embodiment, the reversing unit 30 only includes a first right-angle reversing rod 3001, a first connecting plate 3002, a first steering limiting slide rail 3003, a first steering limiting slider 3004, a first limiting connection assembly 3005, a second steering limiting slide rail 3006, a second steering limiting slider 3007 and a first rotating connection assembly 3008, and its structure is the same as that of the first embodiment, which will not be repeated here.

[0086] In this embodiment, the horizontal reciprocating tensile stress-strain detection unit 40 only includes a first detection slider 4001, a first detection connector 4002, a first contact head mounting plate 4003, a first contact head 4004, a first tension and pressure sensor 4005, a first displacement sensor mounting frame 4006, a first displacement sensor 4007, and a second contact head 4011. The structures and arrangements of the first detection slider 4001, the first detection connector 4002, the first tension and pressure sensor 4005, the first displacement sensor mounting frame 4006, and the first displacement sensor 4007 are the same as those in the first embodiment, and are not described in detail herein.

[0087] The structures of the first contact head 4004 and the second contact head 4011 in this embodiment are the same as those in the first embodiment, but the arrangement of the first contact head 4004 and the second contact head 4011 and the first contact head mounting plate 4003 are changed, specifically:

[0088] The first contact head mounting plate 4003 is an L-shaped plate composed of two mutually perpendicular straight plate parts. One straight plate part of the first contact head mounting plate 4003 is fixedly connected to the straight plate part of the first detection connecting sub-component 40021 fixedly set on the first detection slider 4001, and the other straight plate part is provided with two through holes, corresponding to the first contact head 4004 and the second contact head 4011 respectively. The first contact head 4004 and the second contact head 4011 arranged along the first direction are fixedly connected to the first contact head mounting plate 4003 through the corresponding through holes respectively. There is a certain interval between the first contact head 4004 and the second contact head 4011, which are arranged parallel to each other and are located at the same height plane. In this embodiment, the distance between the center of the circle of the first contact head 4004 and the center of the circle of the second contact head 4011 is 25mm.

[0089] In this embodiment, the first right-angle reversing rod 3001 and the output shaft 2012 of the driving motor 201 are connected by the driving connection assembly 206. Through the reciprocating motion of the output shaft 2012 along the first direction, the first right-angle reversing rod 3001 drives the first contact head 4004 and the second contact head 4011 slidably connected to the second steering limiting slide rail 3006 to reciprocate along the third direction perpendicular to the first direction. During the reciprocating motion, since the first contact head 4004 and the second contact head 4011 are both arranged on the first detection slider 4001, the first contact head 4004 and the second contact head 4011 move in the same direction with the same displacement. The same direction motion data is obtained through the same direction motion detection, and the dynamic characteristics of the skin in the same downward direction can be analyzed separately, or compared with the data detected by the opposite motion in the first embodiment, and the real material mechanical properties of the skin can be further obtained.

[0090] Functions and Effects of the Embodiments

[0091] According to the in-body detection device for dynamically measuring the mechanical properties of skin materials involved in this embodiment, the reciprocating linear motion of the driving motor perpendicular to the surface of the skin to be measured is converted into the horizontal reciprocating tensile motion of the contact head on the surface of the skin to be measured by the right-angle reversing rod, thereby realizing the measurement of the mechanical properties of the skin material. In short, this method can be used to evaluate the dynamic characteristics of the skin.

[0092] Furthermore, by moving the steering limiting slide rail to move the right-angle reversing rod in a preset direction, the movement of the output shaft of the drive motor in a first direction can be converted into reciprocating movement of the contact head in a third direction perpendicular to the first direction.

[0093] Furthermore, the driving limiting slide rail extending along the first direction enables the output end of the driving motor to stably move along the first direction.

[0094] Furthermore, by setting the length of the vertical effective right-angle side of the right-angle reversing rod and the angle of the included angle, the displacement of the contact head and the displacement of the output shaft are in a fixed geometric numerical relationship.

[0095] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An in-vivo detection device for dynamically measuring the mechanical properties of skin materials, characterized in that: include: A horizontal reciprocating tensile stress-strain detection unit, used for contacting with the surface of the skin to be tested and detecting displacement data and tensile pressure data, the horizontal reciprocating tensile stress-strain detection unit comprising at least two contact heads; A driving unit, used for driving the contact head to move, the driving unit comprising a driving motor for outputting a reciprocating linear motion perpendicular to the surface of the skin to be measured, the driving motor having an output shaft for outputting the reciprocating linear motion along a first direction; as well as A reversing unit is used to convert the reciprocating linear motion into a horizontal reciprocating stretching motion of the contact head on the surface of the skin to be tested, The reversing unit comprises at least one right-angle reversing rod, which is composed of a first rod portion and a second rod portion which are perpendicular to each other and connected at their ends. The right-angle reversing rod is used to connect the driving unit and the horizontal reciprocating tensile stress-strain detection unit, and the horizontal reciprocating tensile stress-strain detection unit includes a tensile pressure sensor, a displacement sensor and at least two contact heads.

2. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 1, Features: Wherein, one end of the first rod portion away from the second rod portion is rotatably connected to the end of the output shaft, The switching unit further comprises: A first turning limiting slide rail extending along a second direction having a certain angle with the first direction; A first steering limiting sliding block is slidably disposed on the first steering limiting sliding rail and is rotationally connected to a connecting portion between the first rod portion and the second rod portion; a second turning limiting slide rail extending along a third direction perpendicular to the first direction; The second steering limiting sliding block is slidably arranged on the second steering limiting sliding rail and is rotationally connected to an end of the second rod portion away from the first rod portion.

3. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 2, Features: The reversing unit further comprises a first rotation connection assembly for connecting the second steering limiting slider and an end of the second rod away from the first rod. The number of the contact heads is two, The horizontal reciprocating tensile stress-strain detection unit also includes: A detection slider, slidably disposed on the second steering limiting slide rail; A contact head mounting plate, used for mounting the two contact heads arranged along the first direction, the two contact heads being parallel to each other and located at the same height plane; A tension and pressure sensor, used for detecting the tension and pressure data generated along the third direction; A detection connecting piece, fixedly arranged on the detection slider, used to connect the contact head mounting plate and one end of the tension and pressure sensor; A displacement sensor, used for detecting the displacement data, wherein the housing of the displacement sensor is arranged along the third direction; The displacement sensor mounting frame is arranged beside the detection connecting piece and is used to fix the housing. The other end of the pulling pressure sensor is fixedly connected to the second steering limiting slider. The moving core of the displacement sensor is connected to the detection connecting piece.

4. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 1, Features: in, The reversing unit comprises two right-angle reversing rods, which are referred to as a first right-angle reversing rod and a second right-angle reversing rod. One end of the first rod portion of the first right-angle reversing rod away from the second rod portion and one end of the first rod portion of the second right-angle reversing rod away from the second rod portion are respectively rotatably connected to the end of the output shaft. The switching unit further comprises: A first turning limiting slide rail extending along a second direction having a certain angle with the first direction; A first steering limiting sliding block is slidably disposed on the first steering limiting sliding rail and is rotationally connected to a connecting portion between the first rod portion and the second rod portion of the first right-angle reversing rod; a second turning limiting slide rail extending along a third direction perpendicular to the first direction; A second steering limiting sliding block is slidably disposed on the second steering limiting sliding rail and is rotatably connected to an end of the second rod portion of the first right-angle reversing rod away from the first rod portion; A third turning limiting slide rail extends along a fourth direction having a certain angle with the first direction; a third steering limiting sliding block, slidably disposed on the third steering limiting sliding rail, and rotatably connected to a connecting portion between the first rod portion and the second rod portion of the second right-angle reversing rod; The fourth steering limiting sliding block is slidably arranged on the second steering limiting sliding rail and is rotationally connected to an end of the second rod portion of the second right-angle reversing rod away from the first rod portion.

5. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 4, Features: in, The reversing unit further comprises a first rotation connection assembly for connecting the second steering limiting slider and an end of the second rod portion of the first right-angle reversing rod away from the first rod portion, and a second rotation connection assembly for connecting the fourth steering limiting slider and an end of the second rod portion of the second right-angle reversing rod away from the first rod portion. The horizontal reciprocating tensile stress-strain detection unit comprises two contact heads, which are referred to as a first contact head and a second contact head. The horizontal reciprocating tensile stress-strain detection unit also includes: a first detection sliding block, slidably disposed on the second steering limiting sliding rail; A first contact head mounting plate, used for mounting the first contact head arranged along the first direction; A first tension and pressure sensor, used for detecting the tension and pressure data generated by the first contact head along the third direction; A first detection connecting member, fixedly disposed on the first detection slider, and used to connect the first contact head mounting plate and one end of the first tension and pressure sensor; A first displacement sensor, used for detecting the displacement data of the first contact head, wherein the housing of the first displacement sensor is arranged along the third direction; A first displacement sensor mounting frame, arranged beside the first detection connecting member, and used for fixing the housing of the first displacement sensor; a second detection slider, slidably disposed on the second steering limiting slide rail; A second contact head mounting plate, used for mounting the second contact head arranged along the first direction; A second tension and pressure sensor, used for detecting the tension and pressure data generated by the second contact head along the third direction; A second detection connecting member, fixedly disposed on the second detection slider, and used to connect the second contact head mounting plate and one end of the second tension and pressure sensor; A second displacement sensor, used for detecting the displacement data of the second contact head, wherein the housing of the second displacement sensor is arranged along the third direction; The second displacement sensor mounting frame is arranged beside the second detection connecting member and is used to fix the housing of the second displacement sensor. The other end of the first tension pressure sensor is fixedly connected to the second steering limiting slider. The moving core of the first displacement sensor is connected to the first detection connecting piece. The other end of the second tension pressure sensor is fixedly connected to the fourth steering limiting slider. The moving core of the second displacement sensor is connected to the second detection connecting piece. The first contact head and the second contact head are parallel to each other and located at the same height plane.

6. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 4, characterized in that: in, The reversing unit further comprises a first connecting plate fixedly connected to one end of the first rod portion of the first right-angle reversing rod away from the second rod portion, and a second connecting plate fixedly connected to one end of the first rod portion of the second right-angle reversing rod away from the second rod portion. The drive unit further comprises a drive connection assembly, The drive connection assembly includes a connecting shaft, and a first fastener, a first drive connection member, a first positioning sleeve, a first bearing cover plate, a first bearing, a collar, a second bearing, a second bearing cover plate, a second positioning sleeve, a second drive connection member and a second fastener, which are sequentially sleeved on the connecting shaft. The first connecting plate is provided with a through hole for embedding the first bearing. The second connecting plate is provided with a through hole for embedding the second bearing. One end of the first driving connecting member is provided with a through hole for being sleeved on the connecting shaft, and the other end of the first driving connecting member is connected to the output shaft. One end of the second driving connecting member is provided with a through hole for being sleeved on the connecting shaft, and the other end of the second driving connecting member is connected to the output shaft.

7. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 6, Features: Wherein, the driving unit further includes: A driving limiting slide rail extending along the first direction and arranged below the output shaft; A driving limiting sliding block, slidably disposed on the driving limiting sliding rail; An L-shaped driving connection plate, fixedly disposed on the driving limiting slider, and used to connect the output shaft, and the other end of the first driving connection member and the other end of the second driving connection member; The fixed bracket is fixedly connected to the bottom of the housing of the driving motor.

8. The in-body detection device for dynamically measuring the mechanical properties of skin materials according to claim 6, characterized in that: in, The first fastener and the second fastener are locking nuts, or double nuts, or on the basis of a single nut, double-ear locking washers, Nord-Lock, or thread locking agents are used for further locking.

9. The in-vivo detection device for dynamically measuring the mechanical properties of skin materials according to claim 2 or 4, characterized in that: in, The lengths of the vertical effective right-angle sides corresponding to the first rod portion and the second rod portion of the right-angle reversing rod are respectively a first preset length and a second preset length, Through the first preset length, the second preset length and the included angle, the displacement of the contact head and the displacement of the output shaft are in a fixed geometric numerical relationship.

10. The in-body detection device for dynamically measuring the mechanical properties of skin materials according to claim 9, characterized in that: in, The included angle is 45 degrees, and the first preset length is equal to the second preset length, so that the displacement of the contact head is equal to the displacement of the output shaft.

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