Skin soft tissue expander

Abstract

Disclosed in the present invention is a skin soft tissue expander. The expander comprises: a first stretching assembly comprising a first base plate that can be fixed on the skin and a first connecting member arranged on the first base plate; a second stretching assembly comprising a second base plate that can be fixed on the skin and a second connecting member arranged on the second base plate; and a telescopic rod assembly arranged between the first connecting member and the second connecting member to connect the first connecting member and the second connecting member and configured for driving the second stretching assembly to move toward or away from the first stretching assembly. Compared with skin soft tissue expanders in the prior art, the expander of the present application features a simple structure, fewer parts and components, and a low overall weight, and does not exert pressure on the skin or cause secondary damage when worn on the skin, thereby better meeting the requirements for lightweight wearable devices on the human body. In addition, the operation is convenient, and users can operate by themselves, thereby significantly enhancing the safety and reducing the difficulty of use.

Description

Skin soft tissue extender TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, more particularly to a skin soft tissue extender. BACKGROUND

[0002] The current clinical mainstream method is still to use subcutaneous expansion (skin soft tissue expander), which principle is to bury the expander under the skin, and to inject normal saline into the expansion capsule regularly, so as to generate tension (biological stress) on the surface skin of the expansion capsule, promote cell proliferation and fiber extension, and thus obtain additional skin tissue, which is widely used in clinical scar repair, skin defect, organ reconstruction and other aspects.

[0003] However, the expander still has some shortcomings: 1. Time-consuming: requires multiple operations, first implantation and then expansion; 2. Higher complication: rejection, expansion device rupture and exposure, infection risk, etc.; 3. High cost: high economic cost of implant materials; 4. Complex use, patients need to come to the hospital for expansion device water treatment every week. In view of these problems, a skin soft tissue extender is developed to provide a more convenient, safer and more effective solution.

[0004] The present application provides a skin soft tissue extender to solve the above-mentioned defects of the prior art.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a skin soft tissue extender is constructed, which includes:

[0006] A first stretching assembly including a first bottom plate that can be fixed to the skin, and a first connecting piece provided on the first bottom plate;

[0007] A second stretching assembly including a second bottom plate that can be fixed to the skin, and a second connecting piece provided on the second bottom plate;

[0008] A telescopic rod assembly is provided between the first connecting piece and the second connecting piece to connect the first connecting piece and the second connecting piece, and is used to drive the second stretching assembly to approach or move away from the first stretching assembly. SUMMARY

[0009] In the skin soft tissue extender described in the present application, the telescopic rod assembly includes a first sleeve, a first connecting column fixed to the first end of the first sleeve, and a first screw column inserted into the second end of the first sleeve and threadedly connected with the first sleeve, the first connecting piece is provided with a first adapter hole for the first connecting column to be rotatably inserted and connected, the second end of the first sleeve is provided with a first threaded hole for the first end of the first screw column to be inserted and screwed, and the second end of the first screw column is fixedly connected with the second connecting piece.

[0010] In the skin soft tissue expander, the first end of the first connecting column is fixed with a limiting ball which can rotate in the first adapter hole, and the inner wall of the first adapter hole is provided with a spherical groove corresponding to the position of the limiting ball.

[0011] In the skin soft tissue expander, the diameter of the limiting ball is greater than the diameter of the first connecting column.

[0012] In the skin soft tissue expander, the first sleeve surface is provided with anti-skid lines.

[0013] In the skin soft tissue expander, the telescopic rod assembly includes a second sleeve, a second connecting column fixed to the second end of the second sleeve, and a second screw column inserted into the first end of the first sleeve and threadedly connected with the first sleeve, the second connecting member is provided with a second adapter hole for the second connecting column to rotate and insert, the first end of the second sleeve is provided with a second threaded hole for the second end of the second screw column to insert and screw, and the first end of the second screw column is fixedly connected with the first connecting member.

[0014] In the skin soft tissue expander, the telescopic rod assembly includes a third sleeve, a third screw column inserted into the first end of the third sleeve and threadedly connected with the third sleeve, and a fourth screw column inserted into the second end of the third sleeve and threadedly connected with the third sleeve, the first end of the third sleeve is provided with a third threaded hole for the second end of the third screw column to insert and screw, the second end of the third sleeve is provided with a fourth threaded hole for the first end of the fourth screw column to insert and screw, the first end of the third screw column is fixedly connected with the first connecting member, and the second end of the fourth screw column is fixedly connected with the second connecting member.

[0015] In the skin soft tissue expander, the third screw column and the fourth screw column have the same diameter, and the thread direction of the external thread of the third screw column and the external thread of the fourth screw column is opposite and the pitch is the same.

[0016] In the skin soft tissue expander, the first bottom plate is provided with a first reinforcing beam protruding from the top surface of the first bottom plate, the first connecting member is fixedly connected with the middle part of the first reinforcing beam, the second bottom plate is provided with a second reinforcing beam protruding from the top surface of the second bottom plate, and the second connecting member is fixedly connected with the middle part of the second reinforcing beam.

[0017] In the skin soft tissue expander, the first reinforcing beam is arranged along the length direction of the first bottom plate, and the first reinforcing beam is perpendicular to the length direction of the telescopic rod assembly, the second reinforcing beam is arranged along the length direction of the second bottom plate, and the second reinforcing beam is perpendicular to the length direction of the telescopic rod assembly.

[0018] The skin soft tissue extender of the present application has the following advantages: when the skin soft tissue extender of the present application is used, the first base plate and the second base plate are respectively fixed to the skin surface at different positions, then the first base plate and the second base plate are adjusted to approach or move away from each other by controlling the extension or shortening of the telescopic rod assembly, in the process of the first base plate and the second base plate approaching or moving away from each other, the first base plate and the second base plate drive the skin connected thereto to shift to both sides, giving the skin between the first base plate and the second base plate slow and persistent stress, ultimately promoting skin cell proliferation and fiber elongation, and obtaining additional skin soft tissue. Thus, the obtained additional skin tissue is used for tissue repair and reconstruction.

[0019] Compared with the skin soft tissue extender in the prior art, the extender of the present application has simple structure, fewer parts, and lighter overall weight, and when worn on the skin, it will not cause pressure or secondary damage to the skin, and is more in line with the light requirements of human wearable devices. And convenient to operate, users can operate by themselves, greatly increasing safety and reducing use difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and examples, wherein:

[0021] Fig. 1 is a structural schematic diagram of a first embodiment of the skin soft tissue extender of the present application;

[0022] Fig. 2 is a structural schematic diagram of a first sleeve in the first embodiment of the skin soft tissue extender of the present application;

[0023] Fig. 3 is a structural schematic diagram of a second embodiment of the skin soft tissue extender of the present application;

[0024] Fig. 4 is a structural schematic diagram of the first embodiment of the skin soft tissue extender of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below in conjunction with the drawings.

[0026] As shown in Figs. 1-4, in the first embodiment of the skin soft tissue extender of the present application, the extender 10 comprises:

[0027] a first stretching assembly 11 comprising a first base plate 13 that can be fixed on the skin, and a first connecting piece 15 arranged on the first base plate 13;

[0028] a second stretching assembly 12 comprising a second base plate 14 that can be fixed on the skin, and a second connecting piece 16 arranged on the second base plate 14;

[0029] A telescopic rod assembly 17 is arranged between the first connecting member 15 and the second connecting member 16 to connect the first connecting member 15 and the second connecting member 16 and to drive the second stretching assembly 12 and the first stretching assembly 11 to approach or move away from each other.

[0030] The bottom surfaces of the first bottom plate 13 and the second bottom plate 14 are flat, which facilitates the fixation of the first bottom plate 13 and the second bottom plate 14 to the skin. Specifically, the first bottom plate 13 and the second bottom plate 14 can be fixed to the skin surface by adhesion, or can be fixed to the skin by invasive methods such as piercing the skin with a Kirschner wire or a suture. In other embodiments, the bottom surfaces of the first bottom plate 13 and the second bottom plate 14 are provided with negative pressure suction cups, and the first bottom plate 13 and the second bottom plate 14 are fixed to the skin by negative pressure.

[0031] In one embodiment, the first connecting member 15 is fixed to the first bottom plate 13, and the second connecting member 16 is fixed to the second bottom plate 14. In one embodiment, the telescopic rod assembly 17 can be a telescopic screw assembly, which will be described in detail later. In other embodiments, the telescopic rod assembly 17 can also be a gear and rack or other forms, and can also be a pneumatic, electric or hydraulic telescopic rod, or other telescopic devices that can be extended or shortened.

[0032] When using the skin soft tissue expander of the present application, the first bottom plate 13 and the second bottom plate 14 are fixed to the skin surfaces at different positions, and then the extension or shortening of the telescopic rod assembly 17 is controlled to adjust the approach or movement away of the first bottom plate 13 and the second bottom plate 14. During the approach or movement away of the first bottom plate 13 and the second bottom plate 14, the first bottom plate 13 and the second bottom plate 14 drive the skin connected thereto to move to both sides, giving the skin between the first bottom plate 13 and the second bottom plate 13 a slow and persistent stress, which ultimately promotes the proliferation of skin cells and the elongation of fibers, and additional skin soft tissue is obtained. Thus, the additional skin tissue obtained can be used for tissue repair and reconstruction.

[0033] Compared with the skin soft tissue expander in the prior art, the expander 10 of the present application has a simple structure, fewer parts, and a lighter overall weight. When worn on the skin, it does not produce pressure or secondary damage to the skin, and is more in line with the requirement of lightness of wearable devices. It is also convenient to operate, and users can operate it themselves, greatly increasing safety and reducing the difficulty of use.

[0034] As shown in Fig. 1, it is a first embodiment of the extender 10, in which the telescopic rod assembly 17 comprises a first sleeve 18, a first connecting post 19 fixed to a first end of the first sleeve 18, and a first screw post 20 inserted into a second end of the first sleeve 18 and screwed with the first sleeve 18, the first connecting member 15 is provided with a first adapter hole 21 for the first connecting post 19 to be inserted and connected, the second end of the first sleeve 18 is provided with a first threaded hole 22 for the first end of the first screw post 20 to be inserted and screwed, and the second end of the first screw post 20 is fixedly connected with the second connecting member 16.

[0035] Specifically, the first sleeve 18 and the first connecting post 19 are made of a high molecular material (such as PE material or other high molecular medical material). The second end of the first screw post 20 is fixed with the second connecting member 16, and the first end is inserted into the second end of the first sleeve 18 and screwed with the first threaded hole 22. In a preferred embodiment, the first bottom plate 13, the second bottom plate 14, the first connecting member 15, the second connecting member 16, the first sleeve 18, the first connecting post 19, and the first screw post 20 are all made of medical-grade PC material to reduce the overall weight of the extender 10.

[0036] Preferably, the diameter of the first sleeve 18 is greater than the diameter of the first connecting post 19, and the diameter of the first connecting post 19 is comparable or equal to the diameter of the first screw post 20.

[0037] Further, as shown in Fig. 2, to limit the movement of the first end of the first connecting post 19 in the first adapter hole 21, the first end of the first connecting post 19 is fixedly provided with a limiting ball 23 that can rotate in the first adapter hole 21, and the inner side wall of the first adapter hole 21 is provided with a spherical groove (not shown) at a position corresponding to the limiting ball 23, which can be rotatably embedded with the limiting ball 23.

[0038] When the first end of the first connecting post 19 is inserted into the first adapter hole 21, the limiting ball 23 needs to be embedded into the spherical groove with force. When the first connecting post 19 is rotated, the first connecting post 19 can rotate in the first adapter hole 21, and the limiting ball 23 can rotate in the spherical groove. However, during the rotation process, since the limiting ball 23 is embedded in the spherical groove, it can prevent the first connecting post 19 from moving outwardly or inwardly in the first adapter hole 21, thereby achieving the purpose that the first connecting post 19 and the first adapter hole 21 can only rotate relative to each other and cannot displace relative to each other.

[0039] Specifically, the diameter of the limiting ball 23 is greater than the diameter of the first connecting post 19.

[0040] When the first base plate 13 and the second base plate 14 need to be controlled to approach each other, the first sleeve 18 is rotated in the first direction, the first sleeve 18 drives the first connecting column 19 to rotate in the first adapter hole 21, but the limiting ball 23 is embedded into the spherical groove, so that the first connecting column 19 cannot move left and right in the first adapter hole 21. At the same time, the first sleeve 18 rotates relative to the first screw column 20, so that the first screw column 20 gradually inserts into the first threaded hole 22 under the action of threaded connection, thereby driving the second base plate 14 to move towards the first base plate 13, thereby generating a pulling force (biological stress) on the skin between the first base plate 13 and the second base plate 14, promoting skin cell proliferation and fiber elongation.

[0041] When the first base plate 13 and the second base plate 14 need to be controlled to move away from each other, the first sleeve 18 is rotated in the second direction, the first sleeve 18 drives the first connecting column 19 to rotate in the first adapter hole 21, but the limiting ball 23 is embedded into the spherical groove, so that the first connecting column 19 cannot move left and right in the first adapter hole 21. At the same time, the first sleeve 18 rotates relative to the first screw column 20, so that the first screw column 20 gradually exits from the first threaded hole 22 under the action of threaded connection, thereby driving the second base plate 14 to move away from the first base plate 13, thereby generating a pulling force (biological stress) on the skin between the first base plate 13 and the second base plate 14, promoting skin cell proliferation and fiber elongation.

[0042] In order to facilitate the rotation of the first sleeve 18, the first sleeve 18 is provided with anti-skid lines 24 on the surface.

[0043] The following are the animal in-vitro experimental data of the skin soft tissue expander of the application:

[0044] Expansion time Pigskin length (before expansion) Pigskin length (after expansion) Expansion distance 7 days 20.00 cm 20.95 cm 0.95 cm 7 days 10.5 cm 11.10 cm 0.60 cm 15 days 20.00 cm 22.10 cm 2.10 cm 15 days 10.50 cm 11.50 cm 1.00 cm

[0045] (Note: Pigskin is selected as the experimental model, which meets the ethical requirements and is highly similar to human skin in terms of biomechanical properties)

[0046] From the above data, it can be seen that the skin soft tissue expander of the application can achieve good expansion effect.

[0047] As shown in Fig. 3, the second embodiment of the extender 10 is shown, in which the telescopic rod assembly 17 comprises a second sleeve 25, a second connecting column 26 fixed to the second end of the second sleeve 25, and a second screw column 27 inserted into the first end of the first sleeve 18 and screwed with the first sleeve 18, the second connecting member 16 is provided with a second adapter hole 28 for the second connecting column 26 to be inserted and connected, the first end of the second sleeve 25 is provided with a second threaded hole 29 for the second end of the second screw column 27 to be inserted and screwed, and the first end of the second screw column 27 is fixedly connected with the first connecting member 15.

[0048] Specifically, the second sleeve 25 and the second connecting column 26 are made of a high molecular material (such as PE material or other high molecular medical material). The first end of the second screw column 27 is fixed with the first connecting member 15, and the second end is inserted into the first end of the first sleeve 18 and screwed with the second threaded hole 29. In a preferred embodiment, the first bottom plate 13, the second bottom plate 14, the first connecting member 15, the second connecting member 16, the second sleeve 25, the second connecting column 26, and the second screw column 27 are all made of medical-grade PC material to reduce the overall weight of the extender 10.

[0049] Preferably, the diameter of the second sleeve 25 is greater than the diameter of the second connecting column 26, and the diameter of the second connecting column 26 is comparable or equal to the diameter of the second screw column 27.

[0050] The same as the first embodiment, in order to limit the movement of the second end of the second connecting column 26 in the second adapter hole 28, the second end of the second connecting column 26 is fixedly provided with a limiting ball 23 that can rotate in the second adapter hole 28, and the inner side wall of the second adapter hole 28 is provided with a spherical groove at a position corresponding to the limiting ball 23, which can be rotatably embedded and connected with the limiting ball 23.

[0051] When the second end of the second connecting column 26 is inserted into the second adapter hole 28, the limiting ball 23 needs to be embedded into the spherical groove with force. When the second connecting column 26 is rotated, the second connecting column 26 can rotate in the second adapter hole 28, and the limiting ball 23 can rotate in the spherical groove. However, during the rotation process, since the limiting ball 23 is embedded in the spherical groove, the second connecting column 26 cannot move outwardly or inwardly in the second adapter hole 28, thereby achieving the purpose that the second connecting column 26 and the second adapter hole 28 can only rotate relative to each other and cannot displace relative to each other.

[0052] Specifically, the diameter of the limiting ball 23 is greater than the diameter of the first connecting column 19.

[0053] When it is needed to control the first base plate 13 and the second base plate 14 to approach each other, the second sleeve 25 is rotated in the first direction, the second sleeve 25 drives the second connecting column 26 to rotate in the second adapter hole 28, but the limiting ball 23 is embedded into the spherical groove, so that the second connecting column 26 cannot move left and right in the second adapter hole 28. At the same time, the second sleeve 25 rotates relative to the second screw column 27, so that the second screw column 27 gradually inserts into the second threaded hole 29 under the action of threaded connection, thereby driving the first base plate 13 to move towards the second base plate 14, thereby generating a pulling force (biological stress) on the skin between the first base plate 13 and the second base plate 14, promoting skin cell proliferation and fiber elongation.

[0054] When it is needed to control the first base plate 13 and the second base plate 14 to move away from each other, the second sleeve 25 is rotated in the second direction, the second sleeve 25 drives the second connecting column 26 to rotate in the second adapter hole 28, but the limiting ball 23 is embedded into the spherical groove, so that the second connecting column 26 cannot move left and right in the second adapter hole 28. At the same time, the second sleeve 25 rotates relative to the second screw column 27, so that the second screw column 27 gradually exits from the second threaded hole 29 under the action of threaded connection, thereby driving the first base plate 13 to move away from the second base plate 14, thereby generating a pulling force (biological stress) on the skin between the first base plate 13 and the second base plate 14, promoting skin cell proliferation and fiber elongation.

[0055] As shown in FIG. 4, the third embodiment of the stretcher 10 is shown, in which the telescopic rod assembly 17 includes a third sleeve 30, a third screw column 31 inserted into a first end of the third sleeve 30 and threaded with the third sleeve 30, a fourth screw column 32 inserted into a second end of the third sleeve 30 and threaded with the third sleeve 30, the first end of the third sleeve 30 is provided with a third threaded hole 33 for the second end of the third screw column 31 to be inserted and screwed, the second end of the third sleeve 30 is provided with a fourth threaded hole 34 for the first end of the fourth screw column 32 to be inserted and screwed, the first end of the third screw column 31 is fixedly connected with the first connecting piece 15, and the second end of the fourth screw column 32 is fixedly connected with the second connecting piece 16.

[0056] In order to better control the first base plate 13 and the second base plate 14 to approach or move away from each other synchronously, the third screw column 31 and the fourth screw column 32 have the same diameter, the outer thread of the third screw column 31 and the outer thread of the fourth screw column 32 have opposite thread directions and the same pitch.

[0057] When it is needed to control the first base plate 13 and the second base plate 14 to approach each other, the third sleeve 30 is rotated in the first direction. Since the first end of the third stud 31 is fixedly connected with the first connecting piece 15, the third stud 31 cannot rotate with the third sleeve 30. During the rotation of the third sleeve 30, the third threaded hole 33 drives the third stud 31, the first connecting piece 15 and the first base plate 13 to move in the direction approaching the second base plate 14. At the same time, since the second end of the fourth stud 32 is fixedly connected with the second connecting piece 16, the fourth stud 32 cannot rotate with the third sleeve 30. During the rotation of the third sleeve 30, the fourth threaded hole 34 drives the fourth stud 32, the second connecting piece 16 and the second base plate 14 to move in the direction approaching the first base plate 13. Thus, the first base plate 13 and the second base plate 14 approach each other, and the skin connected with the first base plate 13 and the second base plate 14 is moved and stretched to the middle by the first base plate 13 and the second base plate 14, so as to promote the proliferation of skin cells and the elongation of fibers.

[0058] When it is needed to control the first base plate 13 and the second base plate 14 to move away from each other, the third sleeve 30 is rotated in the second direction. Since the first end of the third stud 31 is fixedly connected with the first connecting piece 15, the third stud 31 cannot rotate with the third sleeve 30. During the rotation of the third sleeve 30, the third threaded hole 33 drives the third stud 31, the first connecting piece 15 and the first base plate 13 to move in the direction moving away from the second base plate 14. At the same time, since the second end of the fourth stud 32 is fixedly connected with the second connecting piece 16, the fourth stud 32 cannot rotate with the third sleeve 30. During the rotation of the third sleeve 30, the fourth threaded hole 34 drives the fourth stud 32, the second connecting piece 16 and the second base plate 14 to move in the direction moving away from the first base plate 13. Thus, the first base plate 13 and the second base plate 14 move away from each other, and the skin connected with the first base plate 13 and the second base plate 14 is moved and stretched to the two sides by the first base plate 13 and the second base plate 14, so as to promote the proliferation of skin cells and the elongation of fibers.

[0059] Further, the first base plate 13 is provided with a first reinforcing beam 35 protruding from the top surface of the first base plate 13, the first connecting piece 15 is fixedly connected with the middle part of the first reinforcing beam 35, the second base plate 14 is provided with a second reinforcing beam 36 protruding from the top surface of the second base plate 14, and the second connecting piece 16 is fixedly connected with the middle part of the second reinforcing beam 36.

[0060] When the telescopic rod assembly 17 is used to pull the first base plate 13 and the second base plate 14, the pulling force is uniformly transmitted to the first base plate 13 and the second base plate 14 through the first reinforcing beam 35 and the second reinforcing beam 36, so as to generate a uniform and effective pulling force. At the same time, the first reinforcing beam 35 and the second reinforcing beam 36 can also increase the stress intensity of the first base plate 13 and the second base plate 14.

[0061] Preferably, the first reinforcing beam 35 is arranged along the length direction of the first bottom plate 13 and is perpendicular to the length direction of the telescopic rod assembly 17, and the second reinforcing beam 36 is arranged along the length direction of the second bottom plate 14 and is perpendicular to the length direction of the telescopic rod assembly 17.

[0062] In the present application, in order to prevent the first bottom plate 13 and the second bottom plate 14 from injuring the skin, the two ends of the first bottom plate 13 are arc-shaped end portions, and the two ends of the second bottom plate 14 are also arc-shaped end portions.

[0063] A plurality of first air holes 37 are arranged on the first bottom plate 13 and penetrate the first bottom plate 13, and a plurality of second air holes 38 are arranged on the second bottom plate 14 and penetrate the second bottom plate 14.

[0064] In the present application, in order to prevent the first screw rod and the first sleeve 18 from rotating relative to each other during the pulling process, the first sleeve 18 is provided with a first locking screw hole and a first locking screw bolt which can abut against the first screw rod and penetrate the first locking screw hole, and the first locking screw bolt can be screwed with the first locking screw hole. Similarly, in order to prevent the second screw rod and the second sleeve 25 from rotating relative to each other during the pulling process, the second sleeve 25 is provided with a second locking screw hole and a second locking screw bolt which can abut against the second screw rod and penetrate the second locking screw hole, and the second locking screw bolt can be screwed with the second locking screw hole. Similarly, in order to prevent the third screw rod, the fourth screw rod and the third sleeve 30 from rotating relative to each other during the pulling process, the first end of the third sleeve 30 is provided with a third locking screw hole and a third locking screw bolt which can abut against the third screw rod and penetrate the third locking screw hole, and the second end of the third sleeve 30 is provided with a fourth locking screw hole and a fourth locking screw bolt which can abut against the fourth screw rod and penetrate the fourth locking screw hole, and the third locking screw bolt can be screwed with the third locking screw hole, and the fourth locking screw bolt can be screwed with the fourth locking screw hole.

[0065] In other embodiments, a locking screw hole and a locking screw bolt which can abut against the first connecting column 19 or the second connecting column 26 and penetrate the locking screw hole can also be arranged on the first connecting piece 15 or the second connecting piece 16, and the locking screw bolt can be screwed with the locking screw hole.

[0066] In addition, in the present application, unless otherwise specifically specified and limited, the terms "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or can be integrated; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made according to the content of the present application, is also included in the patent protection scope of the present application.

[0068]

Claims

1. A skin soft tissue expander, comprising: The extender (10) comprises: a first stretching assembly (11) comprising a first base plate (13) fixable to the skin, and a first connecting member (15) arranged on the first base plate (13); a second stretching assembly (12) comprising a second base plate (14) fixable to the skin, and a second connecting member (16) arranged on the second base plate (14); a telescopic rod assembly (17) arranged between the first connecting member (15) and the second connecting member (16) to connect the first connecting member (15) and the second connecting member (16), and to drive the second stretching assembly (12) to approach or move away from the first stretching assembly (11).

2. The skin soft tissue spreader of claim 1 wherein, The telescopic rod assembly (17) comprises a first sleeve (18), a first connecting column (19) fixed to a first end of the first sleeve (18), and a first screw column (20) inserted into a second end of the first sleeve (18) and threadedly connected with the first sleeve (18), the first connecting member (15) is provided with a first adapter hole (21) for rotatable insertion and connection of the first connecting column (19), the second end of the first sleeve (18) is provided with a first threaded hole (22) for screw connection of the first end of the first screw column (20), and the second end of the first screw column (20) is fixedly connected with the second connecting member (16).

3. The skin soft tissue spreader of claim 2, wherein, A limiting ball (23) is fixed to the first end of the first connecting column (19) and can rotate in the first adapter hole (21), and an inner side wall of the first adapter hole (21) is provided with a spherical groove corresponding to the limiting ball (23) and capable of rotatably embedding the limiting ball (23).

4. The skin soft tissue spreader of claim 3, wherein, The diameter of the limiting ball (23) is greater than the diameter of the first connecting column (19).

5. The skin soft tissue spreader of claim 2, wherein, The surface of the first sleeve (18) is provided with anti-skid lines (24).

6. The skin soft tissue spreader of claim 1 wherein, The telescopic rod assembly (17) comprises a second sleeve (25), a second connecting column (26) fixed to a second end of the second sleeve (25), and a second screw column (27) inserted into a first end of the first sleeve (18) and threadedly connected with the first sleeve (18), the second connecting member (16) is provided with a second adapter hole (28) for rotatable insertion and connection of the second connecting column (26), the first end of the second sleeve (25) is provided with a second threaded hole (29) for screw connection of the second end of the second screw column (27), and the first end of the second screw column (27) is fixedly connected with the first connecting member (15).

7. The skin soft tissue spreader of claim 1 wherein, The telescopic rod assembly (17) comprises a third sleeve (30), a third stud (31) inserted into a first end of the third sleeve (30) and threadedly connected with the third sleeve (30), and a fourth stud (32) inserted into a second end of the third sleeve (30) and threadedly connected with the third sleeve (30), the first end of the third sleeve (30) is provided with a third threaded hole (33) for inserting and threadedly connecting the second end of the third stud (31), the second end of the third sleeve (30) is provided with a fourth threaded hole (34) for inserting and threadedly connecting the first end of the fourth stud (32), the first end of the third stud (31) is fixedly connected with the first connecting piece (15), and the second end of the fourth stud (32) is fixedly connected with the second connecting piece (16).

8. The skin soft tissue spreader of claim 7, wherein, The third stud (31) and the fourth stud (32) have the same diameter, the external threads of the third stud (31) and the fourth stud (32) have opposite thread directions and the same pitch.

9. The skin soft tissue spreader of claim 1 wherein, The first bottom plate (13) is provided with a first reinforcing beam (35) protruding from a top surface of the first bottom plate (13), the first connecting piece (15) is fixedly connected with a middle portion of the first reinforcing beam (35), and the second bottom plate (14) is provided with a second reinforcing beam (36) protruding from a top surface of the second bottom plate (14), and the second connecting piece (16) is fixedly connected with a middle portion of the second reinforcing beam (36).

10. The skin soft tissue spreader of claim 9, wherein, The first reinforcing beam (35) is arranged along a length direction of the first bottom plate (13) and is perpendicular to a length direction of the telescopic rod assembly (17), and the second reinforcing beam (36) is arranged along a length direction of the second bottom plate (14) and is perpendicular to the length direction of the telescopic rod assembly (17).

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