Laparoscopic tissue retractor with bent front end

Abstract

The invention discloses a laparoscopic tissue retractor with a bent front end, which relates to the technical field of medical instruments and comprises an outer sheath, a push tube, a flexible tube, an assembly strip, a plurality of elastic strips and a push mechanism. The front end of the outer sheath is of a bent structure. The pushing tube is arranged in the outer sheath in a sliding mode, the flexible tube is arranged between the pushing tube and the assembling strip, and the elastic strips are arranged on the assembling strip and are symmetrically arranged; the pushing mechanism is arranged in the outer sheath and used for pushing and pulling the push tube to move in the outer sheath, and when the assembly strips move to the outside of the outer sheath, the elastic strips are unfolded towards the two sides of the outer sheath, so that in the laparoscopic surgery, a large stress face can be provided, the tissue damage risk is reduced, the front end of the laparoscopic surgery is bent, and therefore the laparoscopic surgery is more flexible. The device can effectively push parts such as a kidney upper electrode and a kidney lower electrode which are difficult to touch away towards the side direction, and can also carry out moderate pull-back operation in the axial direction of the device, so that tissue separation or traction failure cannot be caused.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and more particularly to a laparoscopic tissue retractor with a curved front end. Background Art

[0002] During laparoscopic surgery, it is often necessary to retract tissues and organs to make enough space for surgical operations. Commonly used retraction tools, such as aspirators and non-destructive forceps, are simple in design and mainly rely on linear force transmission, but when a large pulling force is applied, they may pose a risk of damage to the retracted tissues or organs. As for the existing fan-shaped retractors, although they can provide a wider force-bearing area, they also use a straight rod design and can only achieve lateral pushing movements, but cannot be pulled back in the axial direction of the retractor, otherwise it will cause tissue detachment or loss of traction effect. Especially in operations with extremely limited space such as adrenal surgery via the retroperitoneal route, resection of lesions in the upper or lower pole of the kidney, etc., existing tissue retraction instruments are difficult to meet ideal operating requirements.

[0003] Based on this, we provide a laparoscopic tissue retractor with a curved front end. Summary of the invention

[0004] In order to solve the technical problem that the existing tissue retraction instruments mentioned in the above background technology are difficult to achieve ideal operation requirements, the present invention provides a laparoscopic tissue retractor with a curved front end.

[0005] The present invention provides a laparoscopic tissue retractor with a curved front end, which adopts the following technical solution:

[0006] A laparoscopic tissue retractor with a curved front end comprises an outer sheath, a push tube, a flexible tube, an assembly strip, a plurality of elastic strips and a pushing mechanism; the front end of the outer sheath is a curved structure; the push tube is slidably arranged inside the outer sheath, the flexible tube is arranged between the push tube and the assembly strip, and each of the elastic strips is arranged on the assembly strip and is symmetrically arranged; the pushing mechanism is arranged inside the outer sheath and is used to push and pull the push tube to move inside the outer sheath, and when the assembly strip moves to the outside of the outer sheath, each of the elastic strips unfolds to both sides of the outer sheath.

[0007] By adopting the above technical solution, a larger force-bearing surface can be provided during laparoscopic surgery to reduce the risk of tissue damage. The front end adopts a curved design, which can effectively push the difficult-to-reach parts such as the upper pole and lower pole of the kidney to the side, while also performing moderate pulling back operations along the axis of the instrument without causing tissue detachment or traction failure.

[0008] Preferably, the pushing mechanism includes a sliding sleeve fixedly arranged inside the outer sheath, the sliding sleeve is slidably connected to a moving rod inside, a tooth groove is provided on one side of the moving rod, the inner part of the outer sheath is rotatably connected to a gear, the gear is meshingly connected to the tooth groove, and a driving member is also provided inside the outer sheath for driving the gear to rotate.

[0009] Preferably, the driving member comprises a motor assembled in an outer sheath, the output end of the motor is connected to a worm, a worm wheel is arranged on the top of the gear, and the worm wheel is meshingly connected to the worm.

[0010] Preferably, the driving member further comprises a control switch arranged outside the outer sheath for controlling the start and forward and reverse rotation of the motor.

[0011] Preferably, the push tube is completely matched with the inner wall of the outer sheath, and the cross-sectional shape of the outer sheath is elliptical.

[0012] Preferably, the number of the elastic strips on one side is 3-5.

[0013] In summary, the present invention includes the following beneficial technical effects:

[0014] 1. The push tube is pushed to move inside the outer sheath by the push mechanism, and the flexible tube moves at the bend of the outer sheath, so that the assembly strip is arranged outside the outer sheath, thereby releasing the restriction of each elastic strip, so that it is spread out to both sides outside the outer sheath. Similarly, the push tube is pulled back by the push mechanism, so that the elastic strip can enter the outer sheath again. Through this structural design, a larger force-bearing surface can be provided in laparoscopic surgery to reduce the risk of tissue damage;

[0015] 2. The front end is designed to be curved, which can effectively push the hard-to-reach parts of the kidney, such as the upper and lower poles, to the side, while also performing a moderate pullback operation along the axis of the instrument without causing tissue detachment or traction failure;

[0016] 3. The motor drives the worm to rotate, and the rotation of the worm causes the worm wheel to rotate, thereby driving the gear to rotate. The self-locking of the worm wheel and the worm can ensure the stability of the position of the push tube after it moves.

[0017] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a laparoscopic tissue retractor with a curved front end in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of a laparoscopic tissue retractor with a curved front end in use according to an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure inside a laparoscopic tissue retractor with a curved front end in an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a cross-section of an assembly strip in an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the outer sheath and the push tube in an embodiment of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a pushing mechanism in an embodiment of the present invention;

[0024] Figure 7 is a structural schematic diagram of the other side of the pushing mechanism in an embodiment of the present invention;

[0025] Figure 8 yes Figure 7 The enlarged structural diagram at A in the middle;

[0026] Fig. 9 2 is a schematic cross-sectional view of an assembly strip according to an embodiment of the present invention.

[0027] Explanation of the reference numerals: 1. outer sheath; 2. push tube; 3. flexible tube; 4. assembly strip; 5. elastic strip; 6. pushing mechanism; 600. sliding sleeve; 601. moving rod; 602. tooth groove; 603. gear; 604. motor; 605. worm; 606. worm wheel; 607. control switch; 7. movable slot. DETAILED DESCRIPTION

[0028] The following is combined with Figures 1 to 9 The present invention is described in further detail.

[0029] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0030] The embodiment of the present invention discloses a laparoscopic tissue retractor with a curved front end. Figures 1 to 5A laparoscopic tissue retractor with a curved front end comprises an outer sheath 1, a push tube 2, a flexible tube 3, an assembly strip 4, a plurality of elastic strips 5 and a pushing mechanism 6; the front end of the outer sheath 1 is a curved structure; the push tube 2 is slidably arranged inside the outer sheath 1, the flexible tube 3 is arranged between the push tube 2 and the assembly strip 4, and each elastic strip 5 is arranged on the assembly strip 4 and is symmetrically arranged; the pushing mechanism 6 is arranged inside the outer sheath 1, and is used to push and pull the push tube 2 to move inside the outer sheath 1, and when the assembly strip 4 moves to the outside of the outer sheath 1, each elastic strip 5 unfolds to both sides of the outer sheath 1.

[0031] Specifically, the push tube 2 is pushed to move inside the outer sheath 1 by the pushing mechanism 6, and the flexible tube 3 moves at the bend of the outer sheath 1, so that the assembly strip 4 is arranged outside the outer sheath 1, thereby releasing the restriction of each elastic strip 5, and thus expanding to both sides outside the outer sheath 1. Similarly, the push tube 2 is pulled back by the pushing mechanism 6, so that the elastic strip 5 can enter the outer sheath 1 again. Through this structural design, a larger force-bearing surface can be provided during laparoscopic surgery to reduce the risk of tissue damage. The front end adopts a curved design, which can effectively push the hard-to-reach parts such as the upper pole and lower pole of the kidney to the side, and can also perform a moderate pullback operation along the axial direction of the instrument without causing tissue detachment or traction failure.

[0032] This bidirectional control capability optimizes the exposure of the surgical field, provides surgeons with a more spacious and safe operating environment, and solves the space limitation problem in traditional laparoscopic surgery.

[0033] It is worth noting that: Fig. 9 As shown, one end of the elastic strip 5 is fixedly arranged on the mounting strip 4, and a movable groove 7 is opened on the side of the mounting strip 4. The other end of the elastic strip 5 is slidably arranged in the movable groove 7. When the mounting strip 7 is arranged outside the outer sheath 1, the elastic strip 5 is not restricted and is reset to restore the arc shape. At this time, the two ends of the elastic strip 5 are close to each other. When inside the outer sheath 1, the other end of the elastic strip 5 is away from the fixed end of the elastic strip 5.

[0034] like Figure 6 and Figure 7 as well as Figure 8 As shown, the pushing mechanism 6 includes a sliding sleeve 600 fixedly arranged inside the outer sheath 1, and the sliding sleeve 600 is slidably connected to a moving rod 601 inside. A tooth groove 602 is provided on one side of the moving rod 601. The outer sheath 1 is rotatably connected to a gear 603 inside, and the gear 603 is meshed with the tooth groove 602. A driving member is also provided inside the outer sheath 1 for driving the gear 603 to rotate.

[0035] Specifically, the push mechanism 6 is used by driving the gear 603 to rotate through the driving member, so that the gear 603 cooperates with the tooth groove 602 to drive the movable rod 601 to move inside the outer sheath 1, thereby pushing the push tube 2 to move, and completing the expansion and storage of the elastic strip 5.

[0036] like Figure 7 and Figure 8 As shown, the driving member includes a motor 604 assembled in the outer sheath 1, the output end of the motor 604 is connected to a worm 605, a worm wheel 606 is provided on the top of the gear 603, the worm wheel 606 is meshedly connected with the worm 605, and the motor 604 is a servo motor.

[0037] Specifically, the driving member is used by the motor 604 to drive the worm 605 to rotate, and the rotation of the worm 605 causes the worm wheel 606 to rotate, thereby driving the gear 603 to rotate, and the self-locking of the worm wheel 606 and the worm 605 can ensure the stability of the position of the push tube 2 after moving.

[0038] like Figure 6 As shown, the driving member also includes a control switch 607 arranged outside the outer sheath 1 for controlling the start and forward and reverse rotation of the motor 604.

[0039] Specifically, the control method of the present invention is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field, and the control method and circuit connection are not explained in detail here.

[0040] By pressing the control switch 607 forward and backward, the forward and reverse rotation of the motor 604 is completed, thereby completing the forward and backward movement of the push tube 2.

[0041] like Figure 5 and Figure 6 As shown, the push tube 2 is completely matched with the inner wall of the outer sheath 1, and the cross-sectional shape of the outer sheath 1 is elliptical.

[0042] Specifically, the number of the elastic strips 5 on one side is 3-5.

[0043] Specifically, the control method of the present invention is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field, and the control method and circuit connection are not explained in detail here.

[0044] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0045] The implementation principle of the laparoscopic tissue retractor with a curved front end in an embodiment of the present invention is as follows: the push tube 2 is pushed to move inside the outer sheath 1 by the pushing mechanism 6, and the flexible tube 3 moves at the curved part of the outer sheath 1, so that the assembly strip 4 is arranged outside the outer sheath 1, thereby releasing the restriction of each elastic strip 5, and thus expanding to both sides outside the outer sheath 1. Similarly, by pulling and retracting the push tube 2 through the pushing mechanism 6, the elastic strip 5 can be allowed to enter the outer sheath 1 again. Through this structural design, a larger force-bearing surface can be provided during laparoscopic surgery to reduce the risk of tissue damage. In addition, its front end adopts a curved design, which can effectively push the difficult-to-reach parts such as the upper pole and lower pole of the kidney to the side, and can also perform a moderate pullback operation along the axial direction of the instrument without causing tissue detachment or traction failure.

[0046] The push mechanism 6 is used by driving the gear 603 to rotate through the driving member, so that the gear 603 cooperates with the tooth groove 602 to drive the movable rod 601 to move inside the outer sheath 1, thereby pushing the push tube 2 to move, and completing the expansion and storage of the elastic strip 5.

[0047] The driving member is used by driving the worm 605 to rotate through the motor 604, and the rotation of the worm 605 causes the worm wheel 606 to rotate, thereby driving the gear 603 to rotate. The self-locking of the worm wheel 606 and the worm 605 can ensure the stability of the position of the push tube 2 after moving.

[0048] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0052] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laparoscopic tissue retractor with a curved front end, characterized in that: include: An outer sheath (1), a push tube (2), a flexible tube (3), a mounting strip (4), a plurality of elastic strips (5) and a push mechanism (6); The front end of the outer sheath (1) is a curved structure; The push tube (2) is slidably arranged inside the outer sheath (1), the flexible tube (3) is arranged between the push tube (2) and the assembly strip (4), and each of the elastic strips (5) is arranged on the assembly strip (4) in a symmetrical manner; The pushing mechanism (6) is arranged inside the outer sheath (1) and is used to push and pull the push tube (2) to move inside the outer sheath (1). When the assembly strip (4) moves to the outside of the outer sheath (1), each of the elastic strips (5) unfolds to both sides of the outer sheath (1).

2. The laparoscopic tissue retractor with a curved front end according to claim 1, characterized in that: The pushing mechanism (6) comprises a sliding sleeve (600) fixedly arranged inside the outer sheath (1); a movable rod (601) is slidably connected inside the sliding sleeve (600); a tooth groove (602) is provided on one side of the movable rod (601); a gear (603) is rotatably connected inside the outer sheath (1); the gear (603) is meshedly connected with the tooth groove (602); and a driving member is also provided inside the outer sheath (1) for driving the gear (603) to rotate.

3. The laparoscopic tissue retractor with a curved front end according to claim 2, characterized in that: The driving member comprises a motor (604) assembled in the outer sheath (1), the output end of the motor (604) is connected to a worm (605), a worm wheel (606) is arranged on the top of the gear (603), and the worm wheel (606) is meshingly connected with the worm (605).

4. The laparoscopic tissue retractor with a curved front end according to claim 3, characterized in that: The driving member also includes a control switch (607) arranged outside the outer sheath (1) and used for controlling the start and forward and reverse rotation of the motor (604).

5. The laparoscopic tissue retractor with a curved front end according to claim 1, characterized in that: The push tube (2) is completely matched with the inner wall of the outer sheath (1), and the cross-sectional shape of the outer sheath (1) is elliptical.

6. The laparoscopic tissue retractor with a curved front end according to claim 1, characterized in that: The number of the elastic strips (5) on one side is 3-5.

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