Traction device of drag hook and tissue retraction device

Abstract

The embodiment of the utility model provides a traction device of a drag hook and a tissue traction device. The traction device of the drag hook comprises a shell, a winding assembly and a flexible traction piece, a containing cavity and a mounting hole are formed in the shell, the winding assembly comprises a pressing piece and a winding rotating wheel, the winding assembly has a locking state and an unlocking state which are mutually converted, the winding rotating wheel is rotatably arranged in the containing cavity, and the flexible traction piece is arranged in the containing cavity. The winding rotating wheel and the pressing piece are matched through the limiting protrusion and the limiting hole, the flexible traction piece is wound on the winding rotating wheel, in the locking state, the limiting protrusion is clamped in the limiting hole, in the unlocking state, the limiting protrusion is disengaged from the limiting hole, and the pressing piece penetrates into the mounting hole. And the leading-out length of the flexible traction piece is changed through the rotation of the winding rotating wheel. Therefore, the traction device of the drag hook has the advantages that the tension direction and the acting force stability are good, the cost is reduced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a retractor's traction device and the tissue retractor device with the traction device. BACKGROUND

[0002] In the surgical open operation, need to expand the surgical incision and keep the incision open, so as to provide enough surgical site for the surgeon to operate. At present, surgical retractor is usually used to achieve this purpose. The retractor plays an indispensable role in hip arthroplasty, which helps to improve the safety and accuracy of the operation. In the related art, the retractor cannot be fixed on the equipment during use, and always needs to be pulled and fixed by a dedicated person. For example, the number of retractors used in a hip arthroplasty is usually about 3-5. In the case of dealing with severe acetabular bone defect, additional retractors may be needed to better expose the defect area; or in the case of dealing with severe adhesion of soft tissue around the hip joint, more retractors of different types and angles are needed to fully release and expose, and 1-2 assistants are usually needed to hold the retractor during hip arthroplasty. Because a dedicated person is needed to pull the retractor, as the operation time increases, the operator may become tired, causing the retractor to be unstable, affecting the operation of the operator, and wasting the operating room resources, which greatly increases the work difficulty of medical staff. SUMMARY

[0003] The utility model aims at at least in a certain extent solve one of the technical problems in the related art. For this purpose, the embodiment of the utility model proposes a retractor's traction device. The retractor's traction device has the advantages of good tensioning direction and acting force stability and cost reduction and efficiency increase.

[0004] The embodiment of the utility model also proposes a tissue retractor device.

[0005] The retractor's traction device of the utility model embodiment comprises a shell, a winding assembly and a flexible traction member.

[0006] The shell has a containing cavity and a mounting hole communicating with the containing cavity, the winding assembly includes a pressing piece and a winding rotating wheel fitted in the containing cavity, the winding assembly has a locked state and an unlocked state, the winding rotating wheel is rotatably arranged in the containing cavity, the winding rotating wheel has one of a limiting protrusion and a limiting hole, the pressing piece is arranged in the containing cavity and has the other of the limiting protrusion and the limiting hole, the flexible traction piece is wound on the winding rotating wheel, and the other end of the flexible traction piece is led out of the shell to form a free end for connecting a pulling hook, in the locked state, the limiting protrusion is engaged in the limiting hole, in the unlocked state, the limiting protrusion is disengaged from the limiting hole, and the pressing piece is arranged in the mounting hole to drive the limiting protrusion to disengage from the limiting hole to change the length of the flexible traction piece led out by rotating the winding rotating wheel.

[0007] The pulling device of the pulling hook has the advantages of stable tension direction and acting force and cost reduction and efficiency increase.

[0008] Therefore, the pulling device of the pulling hook has the advantages of stable tension direction and acting force and cost reduction and efficiency increase.

[0009] In some embodiments, the shell includes a base and a cover, the cover is buckled on the base to form the containing cavity, the mounting hole is arranged on the cover, and a part of the pressing piece is led out of the containing cavity through the mounting hole of the cover.

[0010] In some embodiments, the pulling device of the pulling hook further includes a locking piece, the side wall of the base is provided with a limiting groove, and the locking piece is arranged in the area of the shell with the limiting groove.

[0011] In some embodiments, the base is provided with a positioning slot on one side of the containing cavity, and one end of the winding rotating wheel is rotatably arranged in the positioning slot.

[0012] In some embodiments, the shell further comprises an inner cover, the inner cover covers outside of the winding roller, and an outer wall surface of the inner cover is in contact with a side wall of the positioning slot, and the pressing rod passes through the inner cover.

[0013] In some embodiments, the winding roller comprises a wheel body and a roller panel extending inward along an inner wall surface of the wheel body, the roller panel has a through hole, the wheel body has a threading hole, the pressing member passes through the through hole, and one of the limiting protrusion and the limiting hole is on one side of the roller panel in a thickness direction, and in the locked state, the pressing member is in abutment with the roller panel.

[0014] In some embodiments, the winding roller further comprises a flexible coiled tape, the roller panel extends radially along the wheel body inside the wheel body to separate an inner part of the wheel body into a first cavity and a second cavity, the flexible coiled tape is coiled in the first cavity, an inner end of the flexible coiled tape is engaged on the pressing member, and an outer end of the flexible coiled tape is engaged on the wheel body, so as to drive the flexible coiled tape to be wound and unwound by rotation of the winding roller, in a relaxed state of the flexible coiled tape, the flexible traction member is coiled on the winding roller, and in a coiled state of the flexible coiled tape, the flexible traction member is elongated and released.

[0015] In some embodiments, the pulling device of the pull hook further comprises a reset member arranged in the second cavity, the pressing member comprises a pressing rod and a locking boss connected with each other, a cross section of the pressing rod is smaller than a cross section of the locking boss to form a limiting abutment surface at a connection between the two, the limiting protrusion is arranged on the limiting abutment surface, the pressing rod passes through the through hole, the reset member is in abutment between the base and the locking boss, an elastic force of the reset member can force the limiting protrusion to engage with the limiting hole, and the inner end of the flexible coiled tape is engaged on the pressing rod.

[0016] In some embodiments, the wheel body is provided with a notch groove, and the outer end of the flexible coiled tape is engaged on the notch groove.

[0017] In some embodiments, the base has a positioning slot on one side of the containing cavity, the positioning slot, the locking boss and the winding roller each have a plurality of, a plurality of the winding rollers are arranged in the positioning slots one by one, the pressing rod comprises a pressing table and a plurality of rod bodies, one end of each of the plurality of rod bodies is connected with the pressing table, one end of the pressing table can extend out of the mounting hole, and the other end of each of the plurality of rod bodies is connected with one of the plurality of locking bosses one by one.

[0018] In some embodiments, the limiting protrusions and the limiting holes are provided in plurality, and the plurality of limiting protrusions are arranged on the rotating panel in a circumferential direction.

[0019] In some embodiments, the pressing rod has an embedded slot, and the inner end of the elastic band is clamped on the embedded slot of the pressing rod.

[0020] In some embodiments, the bottom of each positioning slot has a limiting ring plate, and an outer ring accommodating slot is formed between the limiting ring plate and the positioning slot, and an inner ring accommodating slot is enclosed by the limiting ring plate, the winding rotating wheel is rotatably arranged in the outer ring accommodating slot, and the locking boss is slidably arranged in the inner ring accommodating slot, so that the limiting protrusion and the limiting hole are disengaged.

[0021] In some embodiments, the bottom of each positioning slot is provided with a positioning hole, one end of the reset member is arranged in the positioning hole, and the other end of the reset member abuts against the locking boss.

[0022] In some embodiments, the pressing table comprises a pressing rod and an expansion boss extending outward from one end of the pressing rod, the expansion boss is connected with the one end of the plurality of rod bodies, and the other end of the pressing rod can extend out of the mounting hole.

[0023] The tissue retractor device of the embodiment of the utility model comprises a retractor and the tissue retractor device according to any one of the preceding embodiments, the retractor is used for being placed at the edge of a wound or tissue, the retractor is used for keeping the wound open during surgery, and the free end of the flexible traction member is connected with the retractor. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a use state diagram of the tissue retractor device of the embodiment of the utility model.

[0025] Figure 2 It is a perspective view of the tissue retractor device of the embodiment of the utility model, and the flexible traction member is in a winding state.

[0026] Figure 3 It is a perspective view of the tissue retractor device of the embodiment of the utility model, and the flexible traction member is in a traction state.

[0027] Figure 4 It is a perspective view of the traction device of the retractor of the embodiment of the utility model.

[0028] Figure 5 It is a top view of the traction device of the retractor of the embodiment of the utility model.

[0029] Figure 6 It is Figure 5A-A direction section view.

[0030] Figure 7 Is the pulling device of the draw hook of the utility model embodiment, omit the outer cover.

[0031] Figure 8 Is the pulling device of the draw hook of the utility model embodiment, omit the outer cover and press the platform.

[0032] Figure 9 Is the three-dimensional view of the locking piece, base and reset piece cooperation of the utility model embodiment.

[0033] Figure 10 Is the three-dimensional view of the base of the utility model embodiment.

[0034] Figure 11 Is the partial section view of the pulling device of the draw hook of the utility model embodiment.

[0035] Figure 12 Is the three-dimensional view of the winding rotary wheel, elastic disc winding tape and press rod cooperation of the utility model embodiment.

[0036] Figure 13 Is the top view of the winding rotary wheel, elastic disc winding tape and press rod cooperation of the utility model embodiment.

[0037] Figure 14 Is the three-dimensional view of the winding rotary wheel and press rod cooperation of the utility model embodiment from the top view angle.

[0038] Figure 15 Is the three-dimensional view of the winding rotary wheel and press rod cooperation of the utility model embodiment from the bottom view angle.

[0039] Figure 16 Is the top view of the winding rotary wheel and press rod cooperation of the utility model embodiment.

[0040] Figure 17 Is the front view of the press rod of the utility model embodiment.

[0041] Figure 18 Is the top view of the press rod of the utility model embodiment.

[0042] Figure 19 Is the three-dimensional view of the elastic disc winding tape of the utility model embodiment.

[0043] Reference signs:

[0044] Tissue retractor device 1000;Operation bed 2000;

[0045] Pulling device 100;Draw hook 200;

[0046] Shell 1;

[0047] Base 11; accommodating cavity 111; limiting groove 112; positioning slot 113; outer ring accommodating groove 114; inner ring accommodating groove 115; positioning hole 116; threaded hole 117;

[0048] Outer cover 12; mounting hole 121; inner cover 13; limiting ring plate 14;

[0049] Winding assembly 2; pressing piece 21; pressing table 211; pressing section 2111; expansion boss 2112;

[0050] Rod body 212;

[0051] Locking boss 213; limiting abutting surface 2131; limiting convex 2132;

[0052] Winding rotating wheel 22;

[0053] Wheel body 221; first cavity 2211; second cavity 2212; threading hole 2213; notch groove 2214;

[0054] Rotating wheel panel 222; via hole 2221; limiting hole 2222;

[0055] Elastic disc coiled tape 223; inner end 2231; outer end 2232;

[0056] Flexible traction member 3;

[0057] Locking member 4;

[0058] Reset member 5. DETAILED DESCRIPTION

[0059] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0060] Reference is made below Figures 1-19 The traction device 100 of the retractor and the tissue retractor device 1000 of the embodiments of the present application are described.

[0061] The traction device 100 of the retractor of the embodiments of the present application comprises a shell 1, a winding assembly 2 and a flexible traction member 3.

[0062] The shell 1 has a containing cavity 111 and a mounting hole 121 communicated with the containing cavity 111, the winding assembly 2 comprises a pressing piece 21 and a winding rotating wheel 22 fitted in the containing cavity 111, the winding assembly 2 has a locked state and an unlocked state, the winding rotating wheel 22 is rotatably arranged in the containing cavity 111, the winding rotating wheel 22 has one of a limiting protrusion 2132 and a limiting hole 2222, the pressing piece 21 is arranged in the containing cavity 111 and has the other of the limiting protrusion 2132 and the limiting hole 2222, a flexible traction piece 3 is wound on the winding rotating wheel 22, and the other end of the flexible traction piece 3 is led out of the shell 1 to form a free end for connecting the pulling hook 200, in the locked state, the limiting protrusion 2132 is clamped in the limiting hole 2222, in the unlocked state, the limiting protrusion 2132 is disengaged from the limiting hole 2222, the pressing piece 21 is arranged in the mounting hole 121 to drive the limiting protrusion 2132 to disengage from the limiting hole 2222, so that the length of the flexible traction piece 3 led out is changed by rotating the winding rotating wheel 22.

[0063] It can be understood that the winding rotating wheel 22 has the limiting protrusion 2132, and the pressing piece 21 has the limiting hole 2222; or the winding rotating wheel 22 has the limiting hole 2222, and the pressing piece 21 has the limiting protrusion 2132.

[0064] The pulling device 100 of the pulling hook can save the labor cost and improve the medical efficiency.

[0065] Therefore, the pulling device 100 of the pulling hook has the advantages of good tension direction and force stability and cost reduction and benefit increase.

[0066] As shown in the accompanying drawings, Figures 4 to 10 The shell 1 comprises a base 11 and a cover 12, the cover 12 is buckled on the base 11 to form the containing cavity 111 between the cover 12 and the base 11, the mounting hole 121 is formed in the cover 12, and a part of the pressing piece 21 is led out of the containing cavity 111 through the mounting hole 121 of the cover 12.

[0067] The pulling device 100 of the draw hook has the advantages of simple structure and high assembly convenience.

[0068] As shown in Figures 4 to 10 The pulling device 100 of the draw hook further comprises a locking piece 4, a limiting groove 112 is arranged on the side wall of the base 11, the locking piece 4 is arranged on the area of the limiting groove 112 of the shell 1, specifically, the third draw hook 200 can be placed at the position of the limiting groove 112, and the third draw hook 200 can be locked through the locking piece 4, the orientation of the third draw hook 200 is opposite to the orientation of the draw hook 200 connected with the flexible traction member 3, and the third draw hook 200 can play a role of fixing the pulling device 100.

[0069] The pulling device 100 of the draw hook can be fixed on the operating bed 200 through the draw hook 200 as a whole by cooperation of the locking piece 4 and the limiting groove 112, and the pulling device 100 has the advantage of high operation convenience.

[0070] Further, as shown in Figure 6 , Figures 9 to 10 The base 11 has a threaded hole 117, the locking piece 4 can be a locking bolt, one end of the locking bolt is arranged in the threaded hole 117, and the one end of the locking bolt can extend into the limiting groove 112. During installation, the draw hook 200 is clamped through the limiting groove 112, and the draw hook 200 is fixed through the locking bolt. Specifically, the draw hook 200 is first placed in the limiting groove 112, and then the locking bolt is screwed to fix the draw hook 200.

[0071] As shown in Figures 8 to 10 The base 11 has a positioning slot 113 on one side of the accommodating cavity 111, and one end of the winding rotating wheel 22 is rotatably arranged in the positioning slot 113.

[0072] The pulling device 100 of the draw hook can make the winding rotating wheel 22 rotatably fixed on the base 11, and further avoid the problem of displacement of the winding rotating wheel 22 when the winding rotating wheel 22 is subjected to the traction force of the flexible traction member 3. Therefore, the pulling device 100 of the draw hook has the advantage of good structural stability.

[0073] As shown in Figure 14 and Figure 16As shown in the drawings, the winding rotating wheel 22 comprises a wheel body 221 and a rotating panel 222 extending inward along the inner wall of the wheel body 221, the rotating panel 222 is provided with a through hole 2221, the wheel body 221 is provided with a threading hole 2213, the pressing piece 21 passes through the through hole 2221, and one of a limiting convex 2132 and a limiting hole 2222 is arranged on one side of the rotating panel 222 in the thickness direction, and the pressing piece 21 abuts against the rotating panel 222 in the locked state.

[0074] The pulling device 100 of the draw hook has the advantages of simple structure and good stability.

[0075] Preferably, the wheel body 221 and the rotating panel 222 can be integrally formed. For example, the wheel body 221 and the rotating panel 222 can be integrally injection molded. Thus, the pulling device 100 of the draw hook has the advantage of good structural integrity.

[0076] As shown in the drawings, Figure 6 , Figure 8 , Figure 12 , Figure 13 and Figure 19 , the winding rotating wheel 22 further comprises a spring-shaped coiled band 223, the rotating panel 222 extends in the radial direction of the wheel body 221 to the inside of the wheel body 221 to divide the inside of the wheel body 221 into a first cavity 2211 and a second cavity 2212, the spring-shaped coiled band 223 is coiled in the first cavity 2211, one of the limiting convex 2132 and the limiting hole 2222 is arranged on the side of the rotating panel 222 forming the second cavity 2212, the inner end 2231 of the spring-shaped coiled band 223 is clamped on the pressing piece 21, and the outer end 2232 of the spring-shaped coiled band 223 is clamped on the wheel body 221, so as to drive the spring-shaped coiled band 223 to be wound and unwound by relying on the rotation of the winding rotating wheel 22, in the relaxed state of the spring-shaped coiled band 223, the flexible traction member 3 is coiled on the winding rotating wheel 22, and in the coiled state of the spring-shaped coiled band 223, the flexible traction member 3 is elongated and released.

[0077] The pulling device 100 of the draw hook has the advantages of simple structure and good stability.

[0078] As shown in the drawings, Figure 6 andFigure 11 As shown, the pulling device 100 of the hook in this embodiment of the present invention also includes a reset member 5 disposed in the second cavity 2212. The pressing member 21 includes a pressing rod and a locking boss 213 connected together. The cross section of the pressing rod is smaller than the cross section of the locking boss 213, and a limiting abutment surface 2131 is formed at the connection between the two. The limiting protrusion 2132 is disposed on the limiting abutment surface 2131. The pressing rod passes through the through hole 2221. The reset member 5 abuts between the base 11 and the locking boss 213. The elastic force of the reset member 5 can force the limiting protrusion 2132 to engage with the limiting hole 2222. The inner end of the elastic coiled tape 223 engages with the pressing rod.

[0079] The traction device 100 of the hook in this embodiment of the invention can automatically unlock the pressing member 21 and the winding wheel 22 through the provided reset member 5, avoiding manual locking of the flexible traction member 3 during surgery. Therefore, the traction device 100 of the hook further improves the ease of operation.

[0080] like Figure 14 As shown, the wheel body 221 is provided with a notch 2214, and the outer end 2232 of the elastic coiled belt 223 passes through the notch 2214 and is engaged with the connection port near the notch 2214.

[0081] like Figures 6 to 11 As shown, there are multiple positioning slots 113, locking bosses 213, and winding wheels 22. The multiple winding wheels 22 are arranged one-to-one in the positioning slots 113. The pressing rod includes a pressing platform 211 and multiple rods 212. One end of each rod 212 is connected to the pressing platform 211. One end of the pressing platform 211 can extend out of the mounting hole 121. The other end of each rod 212 is connected one-to-one with the multiple locking bosses 213.

[0082] Furthermore, the inner end 2231 of the elastic coiled tape 223 is engaged with the rod 212.

[0083] The traction device 100 of this utility model has multiple positioning grooves 113, locking bosses 213, and winding wheels 22. One end of the pressing platform 211 can extend out of the mounting hole 121, and the other ends of multiple rods 212 are connected to multiple locking bosses 213 in a one-to-one correspondence. This enables control of multiple flexible traction members 3, thereby reducing the number of traction devices 100 used. Therefore, the traction device 100 of this traction device has the advantage of reducing surgical costs.

[0084] For example, such as Figures 6 to 11 As shown, there are two of each of the positioning groove 113, the locking boss 213, and the winding roller 22. The two winding rollers 22 are arranged in the positioning groove 113 in a one-to-one correspondence.

[0085] like Figures 14 to 18 As shown, there are multiple limiting protrusions 2132 and multiple limiting holes 2222. The multiple limiting protrusions 2132 are arranged at intervals along the circumference of the rotating plate 222. This allows for locking of different lengths of the flexible traction member 3, and the length of the flexible traction member 3 can be locked according to the traction process during surgery, thus improving the applicability during traction.

[0086] like Figures 6 to 11 As shown, each positioning groove 113 has a limiting ring plate 14 at its bottom. The limiting ring plate 14 and the positioning groove 113 form an annular outer ring receiving groove 114. The limiting ring plate 14 surrounds the inner ring receiving groove 115. The winding wheel 22 is rotatably disposed in the outer ring receiving groove 114. The locking boss 213 is slidably disposed in the inner ring receiving groove 115 so that the limiting boss 2132 disengages from the limiting hole 2222.

[0087] The hook pulling device 100 of this embodiment of the invention, by setting an outer ring receiving groove 114 and an inner ring receiving groove 115 formed by a limiting ring plate 14 at the bottom of the positioning groove 113, can limit the winding wheel 22 and the locking boss 213. Therefore, the hook pulling device 100 has the advantage of good structural stability.

[0088] Furthermore, the cross-section of the inner ring receiving groove 115 can be triangular, quadrilateral, or pentagonal, or it can be other receiving grooves with anti-rotation protrusions or anti-rotation grooves.

[0089] like Figures 6 to 11 As shown, each positioning groove 113 has a positioning hole 116 at its bottom. One end of the reset member 5 is disposed in the positioning hole 116, and the other end of the reset member 5 abuts against the locking boss 213 to limit the position of the reset member 5. Therefore, the pulling device 100 of the hook in this embodiment of the present invention has the advantage of good structural stability.

[0090] Optionally, the reset element 5 can be a compression spring.

[0091] like Figure 11 As shown, the pressing platform includes a pressing section 2111 and an extension boss 2112 extending outward from one end of the pressing section 2111. One end of the extension boss 2112 is connected to one end of a plurality of rods 212, and the other end of the pressing rod can protrude from the mounting hole. Thus, multiple rods 212 can be moved simultaneously by one pressing section 2111 to achieve the extension of multiple flexible traction members 3, making operation simple and convenient.

[0092] like Figures 6 to 11As shown, the pulling device 100 of the hook in this embodiment of the present invention also includes an inner cover 13. The inner cover 13 covers the outside of the winding wheel 22, and the outer wall surface of the inner cover 13 contacts the side wall of the positioning groove 113. The pressing rod passes through the inner cover 13.

[0093] The hook pulling device 100 of this embodiment uses an inner cover 13 located outside the winding roller 22 to position the winding roller 22, thus preventing the winding roller 22 from shifting. Therefore, the hook pulling device 100 has the advantage of good structural stability.

[0094] The tissue retraction device 1000 according to an embodiment of the present invention includes a hook 200 and a tissue retraction device 1000 according to any one of the above. The hook 200 is used to be placed at the edge of the wound or tissue and is used to keep the wound open during surgery. The free end of the flexible traction member 3 is connected to the hook 200.

[0095] The tissue retraction device 1000 of this utility model has the advantages of good stability in tension direction and force, as well as cost reduction and efficiency improvement.

[0096] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0098] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0099] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0100] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0101] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pulling device for a retractor, characterized in that The shell has a receiving cavity and a mounting hole communicating with the receiving cavity; The winding assembly includes a pressing member and a winding roller fitted in the receiving cavity, the winding roller is rotatably arranged in the receiving cavity, the winding roller has one of a limiting protrusion and a limiting hole, the pressing member is arranged in the receiving cavity and has the other of the limiting protrusion and the limiting hole, the flexible traction member is wound on the winding roller, and the other end of the flexible traction member is led out of the shell to form a free end for connecting a pulling hook, in the locked state, the limiting protrusion is engaged in the limiting hole, in the unlocked state, the limiting protrusion is disengaged from the limiting hole, and the pressing member is inserted in the mounting hole to drive the limiting protrusion to disengage from the limiting hole. The shell includes a base and a cover, the cover is buckled on the base to form the receiving cavity, the cover is provided with the mounting hole, and a part of the pressing member is inserted out of the receiving cavity through the mounting hole of the cover.

2. The pulling device of a drag hook according to claim 1, characterized in that The base is further provided with a limiting groove on the side wall, and the locking member is inserted in the limiting groove of the shell.

3. The pulling device of a drag hook according to claim 2, characterized in that The base is provided with a positioning slot on one side of the receiving cavity; 4. The draw set of claim 2, wherein, One end of the winding roller is rotatably arranged in the positioning slot; And / or, the shell further includes an inner cover, the inner cover covers the outside of the winding roller, the outer wall surface of the inner cover is in contact with the side wall of the positioning slot, and the pressing member passes through the inner cover. The winding roller includes a wheel body and a roller panel extending inward along the inner wall surface of the wheel body, the roller panel is provided with a through hole, the wheel body is provided with a threading hole, the pressing member passes through the through hole, one of the limiting protrusion and the limiting hole is arranged on one side of the roller panel in the thickness direction, and the pressing member is in abutment with the roller panel in the locked state.

5. The draw set of claim 2, wherein, The winding roller further includes a resiliently coiled winding tape, the roller panel extends in the radial direction of the wheel body to divide the inside of the wheel body into a first cavity and a second cavity, the resiliently coiled winding tape is coiled in the first cavity, the inner end of the resiliently coiled winding tape is engaged on the pressing member, and the outer end of the resiliently coiled winding tape is engaged on the wheel body, so that the resiliently coiled winding tape is driven to be wound and unwound by the rotation of the winding roller, in the relaxed state of the resiliently coiled winding tape, the flexible traction member is wound on the winding roller, and in the coiled state of the resiliently coiled winding tape, the flexible traction member is elongated and released.

6. The pulling device of a drag hook according to claim 5, characterized in that ​ 7. The pulling device of a drag hook according to claim 6, characterized in that Further comprising a reset member arranged in the second cavity, the pressing member comprises a pressing rod and a locking boss connected with each other, a cross section of the pressing rod is smaller than that of the locking boss, a limiting abutting surface is formed at a joint of the two, a limiting convex is arranged on the limiting abutting surface, the pressing rod is arranged on the through hole, the reset member is arranged between the base and the locking boss, a spring force of the reset member can force the limiting convex to engage with the limiting hole, an inner end of the elastic winding tape is engaged with the pressing rod; And / or, a notch groove is arranged on the wheel body, an outer end of the elastic winding tape is engaged with the notch groove.

8. The pulling device of the drag hook according to claim 7, characterized in that The base forms a side of the accommodating cavity, the side is provided with positioning grooves, the positioning grooves, the locking bosses and the winding wheels are provided in plurality, the winding wheels are arranged in the positioning grooves one by one, the pressing rod comprises a pressing table and a plurality of rod bodies, one end of the rod bodies is connected with the pressing table, one end of the pressing table can extend out of the mounting hole, the other ends of the rod bodies are connected with the locking bosses one by one; And / or, the limiting convexes and the limiting holes are provided in plurality, the limiting convexes are arranged on the rotating plate in a circumferential direction and are spaced apart from each other; And / or, the pressing rod is provided with an embedded groove, the inner end of the elastic winding tape is engaged with the embedded groove of the pressing rod.

9. The retractor device of claim 8, wherein A limiting ring plate is arranged at a bottom of the positioning groove, an outer ring accommodating groove is formed between the limiting ring plate and the positioning groove, the limiting ring plate encloses an inner ring accommodating groove, the winding wheel is rotatably arranged in the outer ring accommodating groove, the locking boss is slidably arranged in the inner ring accommodating groove, so that the limiting convex is disengaged from the limiting hole; And / or, a positioning hole is arranged at the bottom of each positioning groove, one end of the reset member is arranged in the positioning hole, the other end of the reset member is abutted with the locking boss; And / or, the pressing table comprises a pressing section and an expansion boss extending outward from one end of the pressing section, one end of the expansion boss is connected with the one end of the rod bodies, the other end of the pressing rod can extend out of the mounting hole.

10. A tissue retraction device, comprising: The retractor device comprises a retractor and the tissue retractor device according to any one of claims 1-9, the retractor is arranged at an edge of a wound or tissue, the retractor is used to keep the wound open during an operation, a free end of the flexible traction member is connected with the retractor.

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