Tissue retractor for tiny deep incision

Abstract

The invention discloses a tissue retractor for a tiny deep incision, which relates to the technical field of medical instruments and comprises a first vertical arm, a second vertical arm, a pair of traction arms, a pair of handles and a hinge piece, the hinge piece comprises a ball sleeve and a ball shaft, the ball sleeve is arranged in the middle of the first vertical arm, the ball shaft is arranged in the middle of the second vertical arm, and the ball sleeve and the ball shaft are rotationally connected to complete assembly between the first vertical arm and the second vertical arm; the first vertical arm and the second vertical arm form a Y shape; the two handles are assembled at the bottoms of the side ends of the first vertical arm and the second vertical arm respectively; the two traction arms are assembled at the top of the other end of the first vertical arm and the top of the other end of the second vertical arm respectively, through the structural design, the traction device can easily go deep into an incision, deep tissue is effectively pulled open, meanwhile, operation of other surgical instruments is not hindered, and therefore the efficiency and safety of an operation are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more particularly to a tissue retractor for micro deep incision. Background Art

[0002] Laparoscopic surgery is a procedure in which surgical instruments are operated outside the abdomen under the monitoring and guidance of a high-tech display screen through a laparoscope in a closed abdominal cavity to complete the exploration of diseased tissues, electrocoagulation, hemostasis, tissue separation and incision, suturing, etc. It uses a laparoscope, a medical device with a miniature camera, to enter the abdominal cavity through a tiny incision in the abdominal wall, and displays the situation in the abdominal cavity on a TV screen in real time. The doctor performs the surgery based on the images on the screen.

[0003] For severely obese patients, when establishing the first channel during laparoscopic surgery, a small and deep incision needs to be made, which makes it extremely difficult to operate deep inside the incision. Traditional skin hooks often cannot provide ideal visual exposure. Based on this, we provide a tissue retractor with a small deep incision. Summary of the invention

[0004] In order to solve the technical problem that for severely obese patients raised in the above background technology, when establishing the first channel during laparoscopic surgery, a small and deep incision needs to be made, which makes it extremely difficult to operate deep inside the incision, and traditional skin hooks often cannot provide ideal visual exposure, the present invention provides a tissue retractor with a tiny deep incision.

[0005] The micro deep incision tissue retractor provided by the present invention adopts the following technical solution:

[0006] A tissue retractor for a tiny deep incision comprises a first vertical arm, a second vertical arm, a pair of pulling arms, a pair of handles and a hinge; the hinge comprises a ball sleeve and a ball shaft, the ball sleeve is arranged in the middle of the first vertical arm, the ball shaft is arranged in the middle of the second vertical arm, the ball sleeve and the ball shaft are rotatably connected to complete the assembly between the first vertical arm and the second vertical arm; the first vertical arm and the second vertical arm form a Y shape; the two handles are respectively assembled at the bottom of the side ends of the first vertical arm and the second vertical arm; the two pulling arms are respectively assembled at the top of the other end of the first vertical arm and the second vertical arm.

[0007] By adopting the above technical solution, it is possible to easily penetrate deep into the incision and effectively pull open the deep tissue without hindering the operation of other surgical instruments, thereby greatly improving the efficiency and safety of the operation.

[0008] Preferably, a pair of track grooves are formed on the outer side surface of the ball shaft relative to the position of the ball sleeve, and two limiting columns are fixedly connected to the inner wall of the ball sleeve, and the side ends of the limiting columns are arranged in the track grooves.

[0009] By adopting the above technical solution, the horizontality between the first vertical arm and the second vertical arm can be ensured, and the first vertical arm and the second vertical arm can be prevented from being misaligned.

[0010] Preferably, a cavity is provided inside the limiting column, a partition is provided inside the cavity, a moving rod is slidably inserted in the middle of the partition, a plug is fixedly connected to the bottom end of the moving rod, the bottom end of the plug is arranged at the bottom of the limiting column, a magnet is fixedly connected to the top of the moving rod, and the magnet is arranged at the top of the partition; a spring is passed through the middle of the moving rod between the plug and the partition; an electromagnet is provided on the top of the partition, the magnet is in compression contact with the electromagnet, and the plug is in compression contact with the track groove; the electromagnet is energized to separate the plug from the track groove; a pressing mechanism for controlling the operation of the electromagnet is provided on the handle.

[0011] By adopting the above technical solution, the surgeon can flexibly adjust the opening and closing degree of the patient's incision, and can position and limit the size of the incision after opening and closing, maintain the stability of the incision after opening and closing, and avoid the rotation of the first arm and the second arm affecting the surgeon's subsequent operations.

[0012] Preferably, the inner wall of the track groove is provided with a plurality of limiting openings, and the plug can be inserted into the limiting openings.

[0013] Preferably, the distance between the limiting openings decreases equidistantly from the inside of the ball sleeve to the outside of the ball sleeve.

[0014] Preferably, the pressing mechanism includes a chamber opened inside the handle, the interior of the chamber is equipped with a first contact piece, a push rod is slidably inserted into the side of the handle, the side end of the push rod is equipped with a second contact piece, and the interior of the chamber is also equipped with a telescopic rod, the side end of the telescopic rod is in contact with the side end of the second contact piece, and the second contact piece can contact the first contact piece when moving and energize the electromagnet to work.

[0015] Preferably, when the second contact piece moves to contact the first contact piece, the current passing through the electromagnet gradually increases.

[0016] By adopting the above technical solution, the collision impact between the plug and the limiting port can be reduced, the wear between the plug and the limiting port can be reduced, and at the same time, the collision impact between the plug and the limiting port can be avoided, which affects the surgeon's surgical feel.

[0017] Preferably, the telescopic rod is a damping spring telescopic rod.

[0018] In summary, the present invention includes the following beneficial technical effects:

[0019] 1. By inserting two traction arms into the incision, the surgeon clamps the two handles to expand the front ends of the first vertical arm and the second vertical arm, so that the two traction arms can retract the incision, and then the surgeon can perform subsequent surgical operations. The first vertical arm and the second vertical arm are hinged and expanded through the ball sleeve and the ball shaft. The setting of the ball shaft and the ball sleeve can provide axial rotation force to the vertical arm to a certain extent, so that the traction arm rotates outward, and its head end generates additional retraction force. Through this structural design, it is easy to penetrate into the incision and effectively retract the deep tissue without hindering the operation of other surgical instruments, thereby greatly improving the efficiency and safety of the operation.

[0020] 2. By setting the track groove and the limiting column, when the ball shaft and the ball sleeve rotate, the horizontality between the first vertical arm and the second vertical arm can be ensured, avoiding the first vertical arm and the second vertical arm from being misaligned.

[0021] 3. When the pressing mechanism is pressed, the electromagnet is energized and works. At this time, the magnetic poles of the electromagnet are the same as those of the magnet, so the electromagnet can push the magnet to move up in the cavity. At this time, the plug is separated from the track groove, and the limiting column can move in the track groove. When the plug moves up, the spring will contract. When the clamping position of the two handles is determined, the pressing mechanism is released. At this time, the electromagnet loses its magnetic force, and the spring will stretch to complete the extrusion contact between the plug and the track groove again, thereby completing the locking of the ball sleeve and the ball shaft. Through this structural design, the operator can flexibly adjust the opening and closing degree of the patient's incision, and can position and limit the size of the incision after opening and closing, maintain the stability of the incision after opening and closing, and avoid the rotation of the first vertical arm and the second vertical arm to affect the operator's subsequent operations.

[0022] 4. The operator presses the push rod, so that the push rod drives the second contact piece to move, and the second contact piece moves and gradually contacts the first contact piece, thereby the current passing through the electromagnet becomes larger, and the magnetic force of the electromagnet gradually becomes larger, so that the electromagnet can slowly push the magnet up, and similarly, the magnet can also be slowly moved down. Through this structural design, the collision impact between the plug and the limiting port can be reduced, and the wear between the plug and the limiting port can be reduced. At the same time, the collision impact between the plug and the limiting port can be avoided, which affects the operator's surgical feel.

[0023] 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

[0024] Figure 1 is a schematic structural diagram of a tissue retractor for a small deep incision in an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the other side structure of the tissue retractor for a small deep incision in an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the structure of the ball shaft, the track groove and the plug in an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a structure defining the interior of a column in an embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of a cross-section of a limiting column in an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the pressing mechanism in the embodiment of the present invention.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. first vertical arm; 2. second vertical arm; 3. pulling arm; 4. handle; 500. ball sleeve; 501. ball shaft; 6. track groove; 7. limiting column; 700. cavity; 701. partition; 702. moving rod; 703. plug; 704. magnet; 705. spring; 706. electromagnet; 707. limiting opening; 800. first contact piece; 801. push rod; 802. second contact piece; 803. telescopic rod. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 to 6 The present invention is described in further detail.

[0032] 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.

[0033] Embodiment 1

[0034] The present invention discloses a tissue retractor for a small deep incision. Figures 1 to 6 , a tissue retractor for a tiny deep incision comprises a first vertical arm 1, a second vertical arm 2, a pair of pulling arms 3, a pair of handles 4 and a hinge; the hinge comprises a ball sleeve 500 and a ball shaft 501, the ball sleeve 500 is arranged in the middle of the first vertical arm 1, the ball shaft 501 is arranged in the middle of the second vertical arm 2, the ball sleeve 500 and the ball shaft 501 are rotatably connected to complete the assembly between the first vertical arm 1 and the second vertical arm 2; the first vertical arm 1 and the second vertical arm 2 form a Y shape; the two handles 4 are respectively assembled at the bottom of the side ends of the first vertical arm 1 and the second vertical arm 2; the two pulling arms 3 are respectively assembled at the top of the other end of the first vertical arm 1 and the second vertical arm 2.

[0035] Specifically, when a severely obese patient undergoes laparoscopy, a very small and deep incision needs to be made when making the first channel. After the incision is made, the two traction arms 3 are inserted into the incision, and then the surgeon clamps the two handles 4 to expand the front ends of the first vertical arm 1 and the second vertical arm 2, so that the two traction arms 3 retract the incision, and then the surgeon can perform subsequent surgical operations. The first vertical arm 1 and the second vertical arm 2 are hingedly expanded by the ball sleeve 500 and the ball shaft 501. The setting of the ball shaft 501 and the ball sleeve 500 can provide axial rotational force to the vertical arm to a certain extent, so that the traction arm 3 rotates outward, and its head end generates additional retraction force. Through this structural design, it is easy to penetrate into the incision and effectively retract the deep tissue without hindering the operation of other surgical instruments, thereby greatly improving the efficiency and safety of the operation.

[0036] Embodiment 2

[0037] This embodiment is further optimized on the basis of the above embodiment, and the same parts as the above technical solution will not be repeated here. Figure 3 As shown, in order to better realize the present invention, the following setting is particularly adopted: in this embodiment, a pair of track grooves 6 are opened on the outer side surface of the ball shaft 501 relative to the position of the ball sleeve 500, and two limiting columns 7 are fixedly connected to the inner wall of the ball sleeve 500, and the side ends of the limiting columns 7 are arranged in the track grooves 6.

[0038] Specifically, by providing the track groove 6 and the limiting column 7, when the ball shaft 501 and the ball sleeve 500 rotate, the horizontality between the first vertical arm 1 and the second vertical arm 2 can be ensured, thereby avoiding the first vertical arm 1 and the second vertical arm 2 from being misaligned.

[0039] Reference Figure 4 and Figure 5 A cavity 700 is provided inside the limiting column 7, a partition 701 is provided inside the cavity 700, a movable rod 702 is slidably inserted in the middle of the partition 701, a plug 703 is fixedly connected to the bottom end of the movable rod 702, the bottom end of the plug 703 is arranged at the bottom of the limiting column 7, a magnet 704 is fixedly connected to the top of the movable rod 702, and the magnet 704 is arranged at the top of the partition 701; a spring 705 is passed through the middle of the movable rod 702 between the plug 703 and the partition 701; an electromagnet 706 is provided on the top of the partition 701, the magnet 704 is in pressure contact with the electromagnet 706, and the plug 703 is in pressure contact with the track groove 6; the electromagnet 706 is energized to separate the plug 703 from the track groove 6; a pressing mechanism for controlling the operation of the electromagnet 706 is provided on the handle 4.

[0040] Specifically, when the operator clamps the two handles 4, he needs to press the pressing mechanism with his fingers before the rotation between the first vertical arm 1 and the second vertical arm 2 can be completed. When the pressing mechanism is pressed, the electromagnet 706 is energized and works. At this time, the magnetic poles of the electromagnet 706 are the same as the magnetic poles of the magnet 704, so that the electromagnet 706 can push the magnet 704 to move upward in the cavity 700. At this time, the plug 703 is separated from the track groove 6, and the limiting column 7 can move in the track groove 6. When the plug 703 moves upward, the spring 705 will contract. After the clamping position of the two handles 4 is determined, the pressing mechanism is released, and the electromagnet 706 loses its magnetic force, so that the spring 705 will stretch, and the plug 703 and the track groove 6 will be squeezed and contacted again, thereby completing the locking of the ball sleeve 500 and the ball shaft 501. Through this structural design, the operator can flexibly adjust the opening and closing degree of the patient's incision, and can position and limit the size of the incision after opening and closing, maintain the stability of the incision after opening and closing, and avoid the rotation of the first vertical arm 1 and the second vertical arm 2 to affect the operator's subsequent operations.

[0041] Reference Figure 3 The inner wall of the track groove 6 is provided with a plurality of limiting openings 707 , into which the plug 703 can be inserted. The plug 703 is inserted into the limiting opening 707 , which can increase the stability of the locking between the ball sleeve 500 and the ball shaft 501 .

[0042] Specifically, the distance between the limiting openings 707 decreases uniformly from the inside of the ball sleeve 500 to the outside of the ball sleeve 500. This design can help the operator to make slight adjustments to the opening and closing size of the incision.

[0043] Embodiment 3

[0044] This embodiment is further optimized on the basis of the above embodiment, and the same parts as the above technical solution will not be repeated here. Figure 6 As shown, in order to better realize the present invention, the following setting is particularly adopted: in this embodiment, the pressing mechanism includes a chamber opened inside the handle 4, the interior of the chamber is equipped with a first contact piece 800, a push rod 801 is slidably inserted on the side of the handle 4, and the side end of the push rod 801 is equipped with a second contact piece 802, and the interior of the chamber is also equipped with a telescopic rod 803, the side end of the telescopic rod 803 is in contact with the side end of the second contact piece 802, and the second contact piece 802 can contact the first contact piece 800 when moving, and enable the electromagnet 706 to be energized and work.

[0045] Specifically, when the second contact piece 802 moves to contact the first contact piece 800 , the current passing through the electromagnet 706 gradually increases.

[0046] Specifically, the pressing mechanism is used by the operator pressing the push rod 801, so that the push rod 801 drives the second contact piece 802 to move, and the second contact piece 802 moves and gradually contacts the first contact piece 800 (the cross-sectional area (thickness) increases, and its resistance will decrease, thereby causing the current passing through it to increase). As a result, the current passing through the electromagnet 706 becomes larger, and the magnetic force of the electromagnet 706 gradually increases, so that the electromagnet 706 can slowly push the magnet 704 upward, and similarly, the magnet 704 can also be slowly moved downward. Through this structural design, the collision impact between the plug 703 and the limiting port 707 can be reduced, and the wear between the plug 703 and the limiting port 707 can be reduced. At the same time, the collision impact between the plug 703 and the limiting port 707 can be avoided, which affects the operator's surgical feel.

[0047] Specifically, the telescopic rod 803 is a damping spring telescopic rod. This design can slowly separate the second contact piece 802 from the first contact piece 800 .

[0048] 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.

[0049] The implementation principle of the tissue retractor for a tiny deep incision in the embodiment of the present invention is as follows: when a severely obese patient undergoes laparoscopy, a very small and deep incision needs to be made when making the first channel. After the incision is made, two traction arms 3 are inserted into the incision, and then the surgeon clamps the two handles 4 to unfold the front ends of the first vertical arm 1 and the second vertical arm 2, so that the two traction arms 3 retract the incision, and then the surgeon can perform subsequent surgical operations. The first vertical arm 1 and the second vertical arm 2 are hingedly unfolded by the ball sleeve 500 and the ball shaft 501. The arrangement of the ball shaft 501 and the ball sleeve 500 can provide axial rotational force to the vertical arm to a certain extent, so that the traction arm 3 rotates outward, and its head end generates additional traction force.

[0050] By providing the track groove 6 and the limiting column 7 , when the ball shaft 501 and the ball sleeve 500 rotate, the horizontality between the first vertical arm 1 and the second vertical arm 2 can be ensured, thereby avoiding the first vertical arm 1 and the second vertical arm 2 from being misaligned.

[0051] When the operator clamps the two handles 4, he needs to press the pressing mechanism with his fingers before completing the rotation between the first vertical arm 1 and the second vertical arm 2. When the pressing mechanism is pressed, the electromagnet 706 is energized and works. At this time, the magnetic poles of the electromagnet 706 are the same as the magnetic poles of the magnet 704, so that the electromagnet 706 can push the magnet 704 to move upward in the cavity 700. At this time, the plug 703 is separated from the track groove 6, and the limiting column 7 can move in the track groove 6. When the plug 703 moves upward, the spring 705 will contract. When the clamping position of the two handles 4 is determined, the pressing mechanism is released. At this time, the electromagnet 706 loses its magnetic force, so the spring 705 will stretch, completing the extrusion contact between the plug 703 and the track groove 6 again, thereby completing the locking of the ball sleeve 500 and the ball shaft 501.

[0052] The pressing mechanism is used by the operator pressing the push rod 801, so that the push rod 801 drives the second contact piece 802 to move, and the second contact piece 802 moves and gradually contacts the first contact piece 800 (the cross-sectional area (thickness) increases, and its resistance will decrease, thereby causing the current passing through it to increase). As a result, the current passing through the electromagnet 706 becomes larger, and the magnetic force of the electromagnet 706 gradually increases, so that the electromagnet 706 can slowly push the magnet 704 to move upward, and similarly, the magnet 704 can also be slowly moved downward.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 tissue retractor for micro deep incision, characterized in that: include: A first vertical arm (1), a second vertical arm (2), a pair of pulling arms (3), a pair of handles (4) and a hinged member; The hinged component comprises a ball sleeve (500) and a ball shaft (501), wherein the ball sleeve (500) is arranged in the middle of the first vertical arm (1), and the ball shaft (501) is arranged in the middle of the second vertical arm (2), and the ball sleeve (500) and the ball shaft (501) are rotatably connected to complete the assembly between the first vertical arm (1) and the second vertical arm (2); The first vertical arm (1) and the second vertical arm (2) form a Y shape; The two handles (4) are respectively mounted on the bottom of the side ends of the first vertical arm (1) and the second vertical arm (2); The two pulling arms (3) are respectively mounted on the top of the other end of the first vertical arm (1) and the second vertical arm (2).

2. The micro deep incision tissue retractor according to claim 1, characterized in that: A pair of track grooves (6) are provided on the outer side surface of the ball shaft (501) relative to the position of the ball sleeve (500); two limiting columns (7) are fixedly connected to the inner wall of the ball sleeve (500); and the side ends of the limiting columns (7) are arranged in the track grooves (6).

3. The micro deep incision tissue retractor according to claim 2, characterized in that: The limiting column (7) has a cavity (700) formed inside, a partition (701) is provided inside the cavity (700), a movable rod (702) is slidably inserted in the middle of the partition (701), a plug (703) is fixedly connected to the bottom end of the movable rod (702), the bottom end of the plug (703) is arranged at the bottom of the limiting column (7), a magnet (704) is fixedly connected to the top end of the movable rod (702), and the magnet (704) is arranged at the top of the partition (701); A spring (705) is inserted through the middle of the movable rod (702) between the plug (703) and the partition (701); An electromagnet (706) is disposed on the top of the partition (701), the magnet (704) is in press contact with the electromagnet (706), and the plug (703) is in press contact with the track groove (6); The electromagnet (706) is energized to separate the plug (703) from the track groove (6); The handle (4) is provided with a pressing mechanism for controlling the operation of the electromagnet (706).

4. The tissue retractor for micro deep incision according to claim 3, characterized in that: The inner wall of the track groove (6) is provided with a plurality of limiting openings (707), and the plug (703) can be plugged into the limiting openings (707).

5. The tissue retractor for micro deep incision according to claim 4, characterized in that: The distance between the limiting openings (707) decreases equidistantly from the inside of the ball sleeve (500) to the outside of the ball sleeve (500).

6. The tissue retractor for micro deep incision according to claim 3, characterized in that: The pressing mechanism comprises a chamber opened inside the handle (4), the interior of the chamber is equipped with a first contact piece (800), a push rod (801) is slidably inserted into the side of the handle (4), the side end of the push rod (801) is equipped with a second contact piece (802), and the interior of the chamber is also equipped with a telescopic rod (803), the side end of the telescopic rod (803) is in contact with the side end of the second contact piece (802), and the second contact piece (802) can contact the first contact piece (800) when moving, and make the electromagnet (706) energized to work.

7. The tissue retractor for micro deep incision according to claim 6, characterized in that: When the second contact piece (802) moves to contact the first contact piece (800), the current passing through the electromagnet (706) gradually increases.

8. The tissue retractor for micro deep incision according to claim 6, characterized in that: The telescopic rod (803) is a damping spring telescopic rod.

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