Puncture core and gastrointestinal surgery laparoscope puncture outfit

Abstract

The puncture core comprises a puncture rod, a fixing base, a puncture head, a cutting edge and a driving part, the fixing base is fixedly arranged at the upper end of the puncture rod, the upper end of the puncture head is fixedly connected with the lower end of the puncture rod, the tip end of the puncture head faces downwards, a cavity is formed in the puncture head, and the two opposite side faces of the puncture head are sunken inwards to form mounting holes communicated with the cavity. The number of the cutting edges is two, the two cutting edges are in sliding fit in the two mounting holes in a one-to-one correspondence and horizontal sliding mode, the driving part is arranged in the puncture rod and the fixing base, the driving part is used for fixing the two cutting edges to the puncture head, and the driving part is further used for driving the two cutting edges to move inwards so that the outer edges of the cutting edges can move to the inner side of the outer surface of the puncture head. Due to the adoption of the technical scheme, the puncture core can reduce the possibility that a worker accidentally touches a cutting edge and is injured, and can reduce the possibility of cross infection. The invention further relates to a gastrointestinal surgery laparoscope puncture outfit which comprises the puncture core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a puncture core and a laparoscopic puncture device for gastrointestinal surgery. BACKGROUND

[0002] The laparoscopic puncture device is a commonly used medical device for gastrointestinal surgery, which is used to puncture the abdominal wall tissue of the human body to establish a working channel for abdominal surgery during laparoscopic examination and surgery. A currently used disposable laparoscopic puncture device is composed of a puncture sheath and a puncture core, wherein the puncture core includes a puncture rod, a fixing seat, and a puncture head. The fixing seat is fixedly arranged at one end of the puncture rod, and the puncture head is fixedly arranged at the other end of the puncture rod. The puncture head is in a conical structure with a sharp end facing away from the fixing seat, and the two opposite sides of the puncture head are outwardly convex to form a cutting edge. After the use of the disposable laparoscopic puncture device, the puncture head contaminated with body fluids is exposed to the outside, and the staff may accidentally touch the sharp end or the cutting edge of the puncture head and be injured, which may cause cross infection. SUMMARY

[0003] Therefore, the present application aims to provide a puncture core and a laparoscopic puncture device for gastrointestinal surgery to solve the technical problem that after the use of the currently used disposable laparoscopic puncture device, the staff may accidentally touch the sharp end or the cutting edge of the puncture head and be injured, which may cause cross infection.

[0004] The present application is achieved by the following technical solutions: A puncture core includes a puncture rod, a fixing seat, a puncture head, a cutting edge, and a driving part. The fixing seat is fixedly arranged at the upper end of the puncture rod. The upper end of the puncture head is fixedly connected to the lower end of the puncture rod, and the puncture head is in a structure with a sharp end facing downward. A cavity is formed in the puncture head. The two opposite sides of the puncture head are inwardly recessed to form mounting holes communicating with the cavity. The cutting edge is in two, and the two cutting edges are correspondingly and horizontally slidably fitted in the two mounting holes. The driving part is arranged in the puncture rod and the fixing seat. The driving part is used to fix the two cutting edges on the puncture head. The driving part is also used to drive the two cutting edges to move inwardly, so that the outer edge of the cutting edge moves to the inner side of the outer surface of the puncture head.

[0005] Further, the puncture head includes a puncture seat and a puncture cone. The puncture seat is in a circular table shape with a large end facing upward. The cavity is formed in the puncture seat and penetrates the upper and lower end faces of the puncture seat. The puncture cone is in a conical structure with a sharp end facing downward. The puncture cone is coaxially arranged with the puncture seat, and the upper part of the puncture cone is located in the cavity, and the lower part of the puncture cone penetrates the lower end of the cavity to the lower part of the puncture seat. The upper part of the puncture cone cooperates with the lower part of the cavity. The driving unit is used to fix the puncture cone on the puncture seat, and the driving unit is also used to drive the puncture cone to move upward and fully enter the cavity.

[0006] Furthermore, an installation cavity is formed within the fixing seat, and a channel is formed in the middle of the puncture rod, with the upper end of the channel communicating with the installation cavity and the lower end communicating with the cavity body; The driving unit includes a connecting block, a sliding rod, a pushing part, a first limiting part, and two first slide rails. The connecting block is located in the cavity. The connecting block has a first sliding groove at the position corresponding to the two cutting blades. The groove opening size of the first sliding groove is smaller than the cavity size. The two first sliding grooves gradually open from bottom to top. The sliding rod slides in the channel. The lower end of the sliding rod is fixedly connected to the connecting block. The outer circumference of the sliding rod is recessed inward to form a groove. The pushing part is located in the groove and provides an upward elastic force to the sliding rod. The first limiting part is located in the mounting cavity and limits the position of the upper end of the sliding rod. The first limiting part can also release the limit on the upper end of the sliding rod. The two first slide rails are fixedly connected to the two cutting blades one-to-one and slide in the two first sliding grooves one-to-one.

[0007] Furthermore, the inner sidewalls of both first slide rails are recessed to form strip grooves, which are arranged along the length of the first slide rails. The driving unit also includes two limiting rods, which are fixed to the inner sidewalls of the two first sliding grooves in a one-to-one correspondence. The two limiting rods are slidably engaged in the two strip grooves in a one-to-one correspondence. When the limiting rods abut against the upper sidewall of the corresponding strip groove, the projections of the two cutting blades on a horizontal plane are completely within the range of the projection of the channel on the horizontal plane. The lower ends of both first slide rails are connected to the upper ends of the puncture cone in a manner that allows them to slide horizontally along an orientation parallel to the mounting hole; neither of the two first slide rails can move up or down relative to the puncture cone.

[0008] Furthermore, the groove has an annular structure arranged coaxially with the sliding rod; The pushing part includes a fixing ring and a helical spring. The fixing ring is disposed in the middle of the portion of the sliding rod surrounded by the groove. The fixing ring is fixed to the side wall of the channel. The helical spring is sleeved on the portion of the sliding rod surrounded by the groove. The upper end of the helical spring abuts against the upper side wall of the groove, and the lower end abuts against the fixing ring.

[0009] Furthermore, the first limiting part includes a limiting seat and an ice column. The limiting seat is fixed on the lower side wall of the mounting cavity. A receiving cavity is formed inside the limiting seat. The lower end of the receiving cavity is connected to the upper end of the channel. The ice column is disposed in the receiving cavity, and the lower end of the ice column abuts against the upper end of the sliding rod.

[0010] Furthermore, the receiving cavity is cylindrical and communicates with the upper side of the limiting seat; The first limiting part further includes a circular plate, which cooperates with the receiving cavity. The circular plate is fixed at the upper end of the receiving cavity. A first through hole is formed in the middle of the circular plate. The wall of the first through hole is conical. The lower end of the wall of the first through hole opens outward and connects with the lower end of the outer peripheral surface of the circular plate. The mounting base has a discharge hole, which is positioned opposite the first through hole, and the diameter of the discharge hole is larger than the diameter of the first through hole.

[0011] Furthermore, the upper end of the sliding rod protrudes upward to form a first protrusion, the cross-section of the first protrusion is not circular, and the first protrusion is embedded in the icicle; The limiting seat includes a first cylinder, a second cylinder, a sealing cylinder, and a rotating part. The inner cavity of the first cylinder is the receiving cavity. Multiple second protrusions protrude inward from the inner circumference of the first cylinder. The distance from the inner side of the second protrusion to the axis of the first cylinder is less than the distance from the upper edge of the first through hole to the axis of the first cylinder. The second protrusions are embedded in the icicle. Multiple second through holes are formed on the wall of the first cylinder. The lower end of the second cylinder is fixed to the lower side wall of the mounting cavity. The second cylinder is arranged around the first cylinder, and an annular cavity is formed inside the second cylinder. The annular cavity contains a substance that releases heat upon contact with water. Multiple third through holes are formed on the inner sidewall of the annular cavity, and each of the multiple third through holes corresponds to a multiple of the second through holes. The sealing cylinder is disposed between the first cylinder and the second cylinder, and the inner side of the sealing cylinder is bonded and fixed to the outer side of the first cylinder. The sealing cylinder seals the gap between the first cylinder and the second cylinder. A fourth through hole is formed on the sealing cylinder at the position corresponding to each of the second through holes. When the ice column melts and detaches from the second protrusion, the rotating part drives the first cylinder to rotate so that the second through hole aligns with the corresponding third through hole.

[0012] Furthermore, the upper end of the first cylinder is located above the second cylinder, and the outer circumference of the upper part of the first cylinder is recessed inward to form an annular groove. The rotating part includes a third cylinder, a torsion spring, and a second limiting part. The upper end of the third cylinder is fixedly connected to the top wall of the mounting cavity. The upper part of the first cylinder is rotatably fitted inside the third cylinder. The torsion spring is sleeved on the third cylinder. The upper end of the torsion spring is fixedly connected to the third cylinder, and the lower end is fixedly connected to the first cylinder. The second limiting part is used to limit the rotation angle of the first cylinder so that when the second through hole is aligned with the corresponding third through hole, the first cylinder cannot rotate.

[0013] The present invention also provides a laparoscopic trocar for gastrointestinal surgery, including the aforementioned trocar core.

[0014] The beneficial effects of this invention are as follows: After inserting the end of the puncture sheath of the laparoscopic trocar into the patient's abdominal cavity, the puncture core of the present invention is pulled out from the puncture sheath. Then, the two cutting blades are driven to move inward by the drive unit, so that the outer edge of the cutting blade moves to the inner side of the outer surface of the puncture head, so that the two cutting blades are no longer exposed. This can reduce the possibility of staff accidentally touching the blade and getting injured, and can reduce the possibility of cross-infection.

[0015] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the puncture core of the present invention; Figure 2 for Figure 1 Enlarged view of 'a' in the middle; Figure 3 This is a top view of the puncture core of the present invention; Figure 4 for Figure 3 AA section view; Figure 5 for Figure 4 Enlarged view of b in the middle; Figure 6 for Figure 5 Enlarged view of C in the middle; Figure 7 This is an enlarged view of d in section 4; Figure 8 for Figure 4 Enlarged view of 'e' in the middle; Figure 9This is a schematic diagram of the combined structure of the connecting block, cutting blade, first slide rail, puncture cone, slider, second slide rail and baffle in the puncture core of the present invention; Figure 10 for Figure 9 Enlarged view of f in the middle; Figure 11 This is a front view of the combined structure of the connecting block, cutting blade, first slide rail, puncture cone, slider, second slide rail, and baffle in the puncture core of the present invention; Figure 12 for Figure 11 Enlarged view of g in the middle; Figure 13 for Figure 11 BB section view; Figure 14 This is a schematic diagram of the combined structure of the cutting blade, the first slide rail, and the limiting rod in the piercing core of the present invention; Figure 15 This is a schematic diagram of the structure of the first limiting part in the puncture core of the present invention; Figure 16 This is a front view of the first limiting part in the puncture core of the present invention; Figure 17 for Figure 16 CC section view; Figure 18 for Figure 16 DD sectional view.

[0017] In the diagram: 1. Piercing rod; 2. Fixing seat; 3. Cutting blade; 4. Piercing seat; 5. Piercing cone; 6. Rubber ring; 7. Mounting cavity; 8. Channel; 9. Connecting block; 10. Sliding rod; 11. First slide rail; 12. Groove; 13. Strip groove; 14. Limiting rod; 15. First frustum section; 16. Second frustum section; 17. Sliding block; 18. Second slide rail; 19. Baffle; 20. Fixing ring; 11. Spiral Spring-21; Icicle-22; Circular plate-23; First through hole-24; Discharge hole-25; First protrusion-26; First cylinder-27; Second cylinder-28; Sealing cylinder-29; Second protrusion-30; Second through hole-31; Annular cavity-32; Third through hole-33; Fourth through hole-34; Sealing ring-35; Third cylinder-36; Torsion spring-37; Limiting groove-38; Limiting block-39. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0023] Please see Figures 1-18 This invention provides a technical solution: a puncture core, comprising a puncture rod 1, a fixing seat 2, a puncture head, a cutting blade 3, and a driving part. The fixing seat 2 is fixedly disposed on the upper end of the puncture rod 1. The upper end of the puncture head is fixedly connected to the lower end of the puncture rod 1, with the tip pointing downwards. A cavity is formed inside the puncture head. Two opposite sides of the puncture head are recessed inward to form mounting holes communicating with the cavity. There are two cutting blades 3, which are horizontally slidably fitted into the two mounting holes. The driving part is disposed in the puncture rod 1 and the fixing seat 2. The driving part is used to fix the two cutting blades 3 to the puncture head. The driving part is also used to drive the two cutting blades 3 to move inwards, so that the outer edge of the cutting blade 3 moves to the inner side of the outer surface of the puncture head.

[0024] When the puncture core of the present invention is in the initial state, the driving part fixes the two cutting blades 3 to the puncture head, and the cutting edge of the cutting blade 3 is exposed. At this time, the cutting blade 3 cannot slide into the cavity, so as to facilitate subsequent puncture of the abdominal wall.

[0025] The puncture core described in this invention, when used in conjunction with an existing puncture sheath, can be used to puncture the abdominal wall. The puncture method for the abdominal wall is the same as that of the existing puncture core used in conjunction with a puncture sheath. Therefore, the specific operation procedure for puncturing the abdominal wall using the puncture core described in this invention in conjunction with an existing puncture sheath will not be described in detail here.

[0026] After inserting the end of the puncture sheath of the laparoscopic trocar into the patient's abdominal cavity, the puncture core described in this invention is pulled out of the puncture sheath. Then, the two cutting blades 3 are driven to move inward by the drive unit, so that the outer edge of the cutting blade 3 moves to the inner side of the outer surface of the puncture head, so that the two cutting blades 3 are no longer exposed. This can reduce the possibility of staff accidentally touching the blade and getting injured, and can reduce the possibility of cross-infection.

[0027] In this embodiment, the puncture head includes a puncture seat 4 and a puncture cone 5. The puncture seat 4 is a frustum-shaped structure with the larger end facing upward. The cavity is formed inside the puncture seat 4 and extends through the upper and lower end faces of the puncture seat 4. The puncture cone 5 is a cone-shaped structure with the tip facing downward. The puncture cone 5 is coaxially arranged with the puncture seat 4, and the upper part is located inside the cavity, while the lower part passes through the lower end of the cavity to the bottom of the puncture seat 4. The upper part of the puncture cone 5 cooperates with the lower part of the cavity. The driving unit is used to fix the puncture cone 5 to the puncture seat 4, and the driving unit is also used to drive the puncture cone 5 to move upward and completely enter the cavity.

[0028] When the puncture core described in this invention is in its initial state, the driving part fixes the puncture cone 5 to the puncture seat 4, and the tip of the puncture cone 5 is exposed. At this time, the puncture cone 5 cannot slide into the cavity, so as to facilitate subsequent puncture of the abdominal wall.

[0029] After inserting the end of the puncture sheath of the laparoscopic trocar into the patient's abdominal cavity, the puncture core described in this invention is pulled out from the puncture sheath. Then, the puncture cone 5 is driven upward by the drive unit and completely enters the cavity, so that the tip of the puncture cone 5 is no longer exposed. This reduces the possibility of staff accidentally touching the tip of the puncture head and getting injured, and further reduces the possibility of cross-infection.

[0030] In this embodiment, the puncture head includes a rubber ring 6, which is annularly disposed on the puncture cone 5. The puncture cone 5 mates with the annular hole of the rubber ring 6, and the tip of the puncture cone 5 extends below the rubber ring 6. The upper edge of the rubber ring 6 connects with the lower edge of the puncture seat 4. The outer circumferential surface of the rubber ring 6 gradually tapers inward from top to bottom, and the lower end of the outer circumferential surface of the rubber ring 6 connects with the outer circumferential surface of the puncture cone 5. This arrangement ensures that there are no steps between the outer circumferential surface of the puncture cone 5 and the outer circumferential surface of the puncture seat 4, allowing for a smoother transition and reducing the increase in resistance when the puncture head punctures the abdominal wall.

[0031] In this embodiment, an installation cavity 7 is formed inside the fixing seat 2, and a channel 8 is formed in the middle of the piercing rod 1. The upper end of the channel 8 is connected to the installation cavity 7, and the lower end is connected to the cavity body. The driving unit includes a connecting block 9, a sliding rod 10, a pushing part, a first limiting part, and two first slide rails 11. The connecting block 9 is located in the cavity. The connecting block 9 has a first sliding groove formed at the position corresponding to the two cutting blades 3. The groove opening size of the first sliding groove is smaller than the cavity size. Specifically, the cross-section of the first sliding groove is L-shaped. With this structure, the groove opening size of the first sliding groove can be smaller than the cavity size. The two first sliding grooves gradually open from bottom to top. The sliding rod 10 is slidably engaged in the channel 8. The lower end of the sliding rod 10 is fixedly connected to the connecting block 9. The outer circumference of the sliding rod 10 is recessed inward to form a groove 12. The pushing part is provided in the groove 12. The pushing part is used to provide an upward elastic force to the sliding rod 10. The first limiting part is provided in the mounting cavity 7. The first limiting part is used to limit the position of the upper end of the sliding rod 10. The first limiting part can also release the limitation on the upper end of the sliding rod 10. The two first sliding rails 11 are fixedly connected to the two cutting blades 3 one-to-one. The two first sliding rails 11 are slidably engaged in the two first sliding grooves one-to-one.

[0032] When the puncture core of the present invention is in its initial state, the first limiting part limits the position of the upper end of the sliding rod 10, preventing the sliding rod 10 from sliding upward. Under the upward elastic force provided by the pushing part, the sliding rod 10 cannot slide downward. At this time, the positions of the two first sliding grooves are fixed, the positions of the two first sliding rails 11 are fixed, and the positions of the two cutting blades 3 are fixed, allowing the cutting edges of the cutting blades 3 to remain exposed. At this time, the driving part can fix the two cutting blades 3 to the puncture head.

[0033] The first limiting part releases its restriction on the upper end of the sliding rod 10, and the pushing part pushes the sliding rod 10 upward, causing the sliding rod 10 to move the connecting block 9 upward. Since the opening size of the first sliding groove is smaller than the cavity size, the two first sliding grooves gradually open from bottom to top, and the two first slide rails 11 slide in corresponding fit within the two first sliding grooves. For clarity, in this paragraph, the two first sliding grooves are referred to as first sliding groove I and first sliding groove II, the two first slide rails 11 are referred to as first slide rail I and first slide rail II, and the two cutting blades 3 are referred to as cutting blade I and cutting blade II. During the upward movement of the connecting block 9, the first slide groove I can move upward relative to the first slide rail I. The groove wall of the first slide groove I can generate a component force on the first slide rail I towards the side where the first slide rail II is located, causing the first slide rail I to move towards the side where the first slide rail II is located. This, in turn, drives the cutting blade I to move towards the side where the cutting blade II is located. After the cutting blade I moves a certain distance towards the side where the cutting blade II is located, the outer edge of the cutting blade I can move to the inner side of the outer surface of the puncture head. At the same time, the first slide groove II can move upward relative to the first slide rail II. The groove wall of the first slide groove II can generate a component force on the first slide rail II towards the side where the first slide rail I is located, causing the first slide rail II to move towards the side where the first slide rail I is located. This, in turn, drives the cutting blade II to move towards the side where the cutting blade I is located. After the cutting blade II moves a certain distance towards the side where the cutting blade I is located, the outer edge of the cutting blade II can move to the inner side of the outer surface of the puncture head. With this structure, the driving unit can drive the two cutting blades 3 to move inward, that is, the outer edge of the cutting blades 3 can move to the inner side of the outer surface of the puncture head.

[0034] In this embodiment, the two first slide rails 11 are staggered (please refer to...). Figure 13 As shown), this ensures that the two first slide rails 11 do not obstruct each other during their relative movement.

[0035] In this embodiment, the inner sidewalls of both first slide rails 11 are recessed to form strip grooves 13, and the strip grooves 13 are arranged along the length direction of the first slide rails 11. The driving unit also includes two limiting rods 14, which are fixed to the inner sidewalls of the two first sliding grooves in a one-to-one correspondence. The two limiting rods 14 are slidably engaged in the two strip grooves 13 in a one-to-one correspondence. When the limiting rods 14 abut against the upper sidewall of the corresponding strip groove 13, the projections of the two cutting blades 3 on a horizontal plane are completely within the range of the projection of the channel 8 on the horizontal plane. The lower ends of both first slide rails 11 are connected to the upper ends of the puncture cone 5 in a manner that allows them to slide horizontally along an orientation parallel to the mounting hole; neither of the two first slide rails 11 can move up or down relative to the puncture cone 5.

[0036] When the puncture core of the present invention is in its initial state, the first limiting part limits the position of the upper end of the sliding rod 10, preventing the sliding rod 10 from sliding upward. Under the upward pushing force provided by the pushing part, the sliding rod 10 cannot slide downward. At this time, the positions of the two first sliding grooves are fixed, the positions of the two first sliding rails 11 are fixed, and the puncture cone 5 cannot move up or down. At this time, the driving part can fix the puncture cone 5 on the puncture seat 4.

[0037] After the sliding rod 10 and connecting block 9 move upward a certain distance, that is, after the upper end of the first slide rail 11 moves downward and inward a certain distance relative to the corresponding first slide groove, the limiting rod 14 abuts against the upper side wall of the corresponding strip groove 13. At this time, the first slide rail 11 can no longer move downward and inward relative to the first slide groove. At this time, the projections of the two cutting blades 3 on a horizontal plane are completely within the range of the projection of the channel 8 on the horizontal plane. As the sliding rod 10 and connecting block 9 continue to move upward, the connecting block 9 drives the two first slide rails 11 to move upward, and the two first slide rails 11 drive the piercing cone 5 to move upward. After the piercing cone 5 moves upward a certain distance, the piercing cone 5 can completely enter the cavity. The driving part can thus drive the piercing cone 5 to move upward and completely enter the cavity.

[0038] In this embodiment, the cavity includes a first frustum section 15 and a second frustum section 16. The smaller end of the first frustum section 15 faces upward, and its upper edge connects to the lower edge of the channel 8. The lower end of the first frustum section 15 is flush with the upper end of the mounting hole. The larger end of the second frustum section 16 faces upward, and its upper edge connects to the lower edge of the first frustum section 15. The lower end of the second frustum section 16 communicates with the lower end face of the puncture seat 4. The mounting hole is specifically formed on the side wall of the second frustum section 16. The upper part of the puncture cone 5 is specifically located inside the second frustum section 16, and the lower part specifically extends through the lower end of the second frustum section 16 to below the puncture seat 4. The upper part of the puncture cone 5 specifically mates with the lower part of the second frustum section 16.

[0039] In this embodiment, the lower ends of the two first slide rails 11 are each fixed with a slider 17, and the lower sides of the two sliders 17 are recessed upward to form a second slide groove. The groove opening size of the second slide groove is smaller than the groove cavity size. Specifically, the edge of the cross-section of the second slide groove is composed of a large arc and a straight line segment, so that the groove opening size of the second slide groove can be smaller than the groove cavity size.

[0040] Two second slide rails 18 are fixedly provided on the upper side of the puncture cone 5. Both second slide rails 18 are horizontally arranged parallel to the orientation of the mounting hole, and the two second slide rails 18 are slidably engaged in the two second slide grooves in a one-to-one correspondence. With this structure, the lower end of the first slide rail 11 can be connected to the upper end of the puncture cone 5 in a manner that allows it to slide horizontally along the orientation parallel to the mounting hole; the first slide rail 11 cannot move up and down relative to the puncture cone 5.

[0041] In this embodiment, baffles 19 are formed on the upper sides of both ends of the second slide rail 18. The baffles 19 can block the slider 17, preventing the slider 17 from detaching from the second slide rail 18, thereby preventing the piercing cone 5 from falling from the lower end of the two first slide rails 11.

[0042] In this embodiment, the groove 12 is an annular structure arranged with the center line of the sliding rod 10 coaxially; The pushing part includes a fixing ring 20 and a helical spring 21. The fixing ring 20 is arranged around the middle of the portion of the sliding rod 10 surrounded by the groove 12. The fixing ring 20 is fixed to the side wall of the channel 8. The helical spring 21 is sleeved on the portion of the sliding rod 10 surrounded by the groove 12. The upper end of the helical spring 21 abuts against the upper side wall of the groove 12, and the lower end abuts against the fixing ring 20.

[0043] When the puncture core described in this invention is in its initial state, the helical spring 21 is compressed, thereby providing an upward elastic force to the sliding rod 10. After the first limiting part releases its restriction on the upper end of the sliding rod 10, the helical spring 21 can elastically extend and push the sliding rod 10 upward within the channel 8. The pushing part can thus push the sliding rod 10 upward.

[0044] In this embodiment, the first limiting part includes a limiting seat and an ice column 22. The limiting seat is fixed on the lower side wall of the mounting cavity 7. A receiving cavity is formed in the limiting seat. The lower end of the receiving cavity is connected to the upper end of the channel 8. The ice column 22 is disposed in the receiving cavity. The lower end of the ice column 22 abuts against the upper end of the sliding rod 10.

[0045] After the puncture core of the present invention is manufactured in the factory, it is stored in a refrigerator to prevent the ice column 22 from melting. At this time, the first limiting part can limit the position of the upper end of the sliding rod 10. Before using the puncture core of the present invention, it is taken out of the refrigerator. Since the time taken from the start of puncturing the patient's abdominal wall to inserting the end of the puncture sheath into the patient's abdominal cavity is short, the amount of ice column 22 melting is small, the ice column 22 can keep abutting the upper end of the sliding rod 10, so that the sliding rod 10 hardly slides upward. The cutting blade 3 and the puncture cone 5 can both be kept fixed on the puncture seat 4, so that the puncture core of the present invention can smoothly puncture the patient's abdominal wall.

[0046] After the end of the laparoscopic trocar's sheath is inserted into the patient's abdominal cavity and the puncture core described in this invention is withdrawn from the puncture sheath, the ice column 22 gradually melts. During the melting process of the ice column 22, the pushing part gradually pushes the sliding rod 10 upward, and the cutting blade 3 and the puncture cone 5 gradually move into the cavity. After the ice column 22 has melted for a certain period of time, the outer edge of the cutting blade 3 can move to the inner side of the outer surface of the puncture head, and the puncture cone 5 can then completely enter the cavity. The first limiting part can thus release the restriction on the upper end of the sliding rod 10.

[0047] After the icicle 22 has melted for a period of time, the first limiting part can release its restriction on the upper end of the sliding rod 10, enabling automatic release of the restriction on the upper end of the sliding rod 10. This allows the outer edge of the cutting blade 3 to move to the inner side of the puncture head's outer surface without additional operator intervention, and allows the puncture cone 5 to fully enter the cavity. This avoids situations where the outer edge of the cutting blade 3 is not moved to the inner side of the puncture head's outer surface due to operator negligence, or the puncture cone 5 is not fully entered into the cavity. It further reduces the possibility of operators accidentally touching the tip of the puncture head and the cutting blade 3 and being injured, and further reduces the possibility of cross-infection.

[0048] In this embodiment, the receiving cavity is cylindrical and the receiving cavity is connected to the upper side of the limiting seat; The first limiting part also includes a circular plate 23, which cooperates with the receiving cavity. The circular plate 23 is fixed at the upper end of the receiving cavity. A first through hole 24 is formed in the middle of the circular plate 23. The hole wall of the first through hole 24 is conical. The lower end of the hole wall of the first through hole 24 opens outward and connects with the lower end of the outer peripheral surface of the circular plate 23. The fixing base 2 has a discharge hole 25, which is positioned opposite the first through hole 24, and the diameter of the discharge hole 25 is larger than the diameter of the first through hole 24.

[0049] After the icicle 22 melts for a certain period of time, its diameter becomes smaller than the diameter of the first through hole 24. At this point, the first limiting part can release the restriction on the upper end of the sliding rod 10, and the pushing part can push the sliding rod 10 upward. The sliding rod 10 can push the icicle 22 upward, causing it to exit from the upper end of the first through hole 24. During the upward movement of the icicle 22, its upper end can pass through the discharge hole 25 to prevent the upper sidewall of the mounting cavity 7 from obstructing its upward movement. This allows for faster and more automatic movement of the outer edge of the cutting blade 3 to the inner side of the puncture head's outer surface, and faster and more automatic entry of the puncture cone 5 into the cavity. This reduces the time the cutting blade 3 and puncture cone 5 are exposed, further reducing the possibility of workers accidentally touching the tip of the puncture head and the cutting blade 3 and getting injured, and further reducing the possibility of cross-infection.

[0050] In this embodiment, the upper end of the sliding rod 10 protrudes upward to form a first protrusion 26. The cross-section of the first protrusion 26 is not circular. In this embodiment, the first protrusion 26 is cuboid in shape. It can be understood that in other embodiments, the first protrusion 26 may also be triangular prism in shape. The first protrusion 26 is embedded in the icicle 22. The limiting seat includes a first cylinder 27, a second cylinder 28, a sealing cylinder 29, and a rotating part. The inner cavity of the first cylinder 27 is the receiving cavity. Multiple second protrusions 30 are formed protruding inward from the inner circumference of the first cylinder 27. The distance from the inner side of the second protrusion 30 to the axis of the first cylinder 27 is less than the distance from the upper edge of the first through hole 24 to the axis of the first cylinder 27. The second protrusions 30 are embedded in the icicle 22. Multiple second through holes 31 are formed on the cylinder wall of the first cylinder 27. The lower end of the second cylinder 28 is fixed to the lower side wall of the mounting cavity 7. The second cylinder 28 is arranged around the first cylinder 27. An annular cavity 32 is formed inside the second cylinder 28. The cavity 32 contains a substance that releases heat upon contact with water. Multiple third through holes 33 are formed on the inner sidewall of the annular cavity 32, and the multiple third through holes 33 correspond one-to-one with the multiple second through holes 31. The sealing cylinder 29 is disposed between the first cylinder 27 and the second cylinder 28. The inner side of the sealing cylinder 29 is bonded and fixed to the outer side of the first cylinder 27. The sealing cylinder 29 seals the gap between the first cylinder 27 and the second cylinder 28. A fourth through hole 34 is formed on the sealing cylinder 29 at the position corresponding to each of the second through holes 31. When the ice column 22 melts and detaches from the second protrusion 30, the rotating part drives the first cylinder 27 to rotate so that the second through hole 31 is aligned with the corresponding third through hole 33.

[0051] The sealing cylinder 29 is made of rubber or silicone material, and the substance that releases heat when it comes into contact with water can be calcium oxide, anhydrous ethanol, or cement.

[0052] When the puncture core of the present invention is in its initial state, the first protrusion 26 and the second protrusion 30 are both embedded in the ice column 22. The connecting block 9 and the sliding rod 10 cannot rotate under the restriction of the cooperation between the cutting blade 3 and the mounting hole. The ice column 22 cannot rotate, the first cylinder 27 cannot rotate, the second through hole 31 and the third through hole 33 are in a staggered state, and the annular cavity 32 is in a sealed state.

[0053] After the icicle 22 has melted for a certain period of time, when it detaches from the second protrusion 30, the rotating part drives the first cylinder 27 to rotate so that the second through hole 31 aligns with the corresponding third through hole 33. At this time, the second through hole 31, the third through hole 33, and the fourth through hole 34 connect the inner cavity of the first cylinder 27 and the annular cavity 32. Some of the water formed by the melting of the icicle 22 can sequentially enter the annular cavity 32 through the second through hole 31, the fourth through hole 34, and the third through hole 33. The water in the annular cavity 32 releases heat upon contact with the water. The substance comes into contact with water and releases heat. The released heat can enter the first cylinder 27, allowing the ice column 22 to melt more quickly. It can also move the outer edge of the cutting blade 3 to the inner side of the outer surface of the puncture head more quickly and automatically, and allow the puncture cone 5 to fully enter the cavity more quickly and automatically. This can further reduce the time that the cutting blade 3 and the puncture cone 5 are exposed to the outside, further reduce the possibility that the staff may accidentally come into contact with the tip of the puncture head and the cutting blade 3 and be injured, and further reduce the possibility of cross-infection.

[0054] In this embodiment, a sealing groove is formed by an inward recess on the upper outer circumference of the sliding rod 10. A sealing ring 35 is provided in the sealing groove. The sealing ring 35 is made of rubber or silicone and is press-fitted with the sealing groove. The outer circumferential surface of the sealing ring 35 abuts against the wall of the channel 8. The sealing ring 35 can seal the gap between the inner wall of the channel 8 and the outer circumferential surface of the sliding rod 10, preventing water formed after the ice column 22 melts from entering the cavity inside the puncture head through the gap between the inner wall of the channel 8 and the outer circumferential surface of the sliding rod 10. This also prevents water formed after the ice column 22 melts from entering the patient's abdominal cavity through the installation hole.

[0055] In this embodiment, the upper end of the first cylinder 27 is located above the second cylinder 28, and the outer periphery of the upper part of the first cylinder 27 is recessed inward to form an annular groove. The rotating part includes a third cylinder 36, a torsion spring 37, and a second limiting part. The upper end of the third cylinder 36 is fixedly connected to the top wall of the mounting cavity 7. The upper part of the first cylinder 27 is rotatably fitted inside the third cylinder 36. The torsion spring 37 is sleeved on the third cylinder 36. The upper end of the torsion spring 37 is fixedly connected to the third cylinder 36, and the lower end is fixedly connected to the first cylinder 27. The second limiting part is used to limit the rotation angle of the first cylinder 27 so that when the second through hole 31 is aligned with the corresponding third through hole 33, the first cylinder 27 cannot rotate.

[0056] When the piercing cone 5 of the present invention is in its initial state, the torsion spring 37 is in a state of torsional storage. After the icicle 22 has melted for a certain period of time, when the icicle 22 detaches from the second protrusion 30, the first cylinder 27 loses the restraining effect of the icicle 22. At this time, under the elastic force of the torsion spring 37, the first cylinder 27 can rotate. After the first cylinder 27 rotates a certain angle, when the second through hole 31 aligns with the corresponding third through hole 33, the second limiting part limits the rotation angle of the first cylinder 27, and the first cylinder 27 cannot continue to rotate. When the icicle 22 melts to the point of detaching from the second protrusion 30, the rotating part can thus drive the first cylinder 27 to rotate, and the second through hole 31 can thus align with the corresponding third through hole 33. After the icicle 22 has melted for a certain period of time, the rotating part can automatically drive the first cylinder 27 to rotate, and can automatically align the second through hole 31 with the corresponding third through hole 33, making it very convenient to align the second through hole 31 with the corresponding third through hole 33.

[0057] In this embodiment, the inner circumferential surface of the second cylinder 28 is recessed to form an arc-shaped limiting groove 38. The length direction of the limiting groove 38 is arranged along the circumferential direction of the second cylinder 28. The outer circumferential surface of the sealing cylinder 29 is fixedly provided with a limiting block 39. The limiting block 39 is slidably engaged in the limiting groove 38. When the first cylinder 27 rotates and drives the limiting block 39 to slide to abut against one end face of the limiting groove 38, the second through hole 31 is aligned with the corresponding third through hole 33.

[0058] After the first cylinder 27 rotates a certain angle, the second through hole 31 aligns with the third through hole 33. At this time, the limiting block 39 slides to abut against one end face of the limiting groove 38, preventing the first cylinder 27 from continuing to rotate. The second limiting part thus limits the rotation angle of the first cylinder 27, ensuring that when the second through hole 31 aligns with the corresponding third through hole 33, the first cylinder 27 cannot rotate.

[0059] The present invention provides another technical solution: a laparoscopic trocar for gastrointestinal surgery, comprising the above-mentioned trocar core.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A piercing core characterized by: The puncture rod, the fixed seat, the puncture head, the cutting blade and the driving part, the fixed seat is fixed on the upper end of the puncture rod, the upper end of the puncture head is fixedly connected with the lower end of the puncture rod, and the tip is downward, the cavity is formed in the puncture head, the two opposite sides of the puncture head are recessed to form the mounting hole communicating with the cavity, the cutting blade is two, the two cutting blades are correspondingly and horizontally slidably slid in the two mounting holes, the driving part is arranged in the puncture rod and the fixed seat, the driving part is used for fixing the two cutting blades on the puncture head, and the driving part is also used for driving the two cutting blades to move inward, so that the outer edge of the cutting blade moves to the inside of the outer surface of the puncture head.

2. The puncture core according to claim 1, characterized in that: The puncture head includes a puncture seat and a puncture cone, the puncture seat is a circular table shape with a large end upward, the cavity is formed in the puncture seat and penetrates the upper and lower end faces of the puncture seat, the puncture cone is a conical structure with a tip downward, the puncture cone is coaxially arranged with the puncture seat, and the upper part is located in the cavity, and the lower part penetrates the lower end of the cavity to the lower part of the puncture seat, the upper part of the puncture cone is matched with the lower part of the cavity; The driving part is used for fixing the puncture cone on the puncture seat, and the driving part is also used for driving the puncture cone to move upward and completely enter the cavity.

3. The puncture core according to claim 2, characterized in that: The fixed seat is formed with an installation cavity, the middle part of the puncture rod is formed with a hole channel, the upper end of the hole channel communicates with the installation cavity, and the lower end communicates with the cavity; The driving part includes a connecting block, a sliding rod, a pushing part, a first limiting part and two first sliding rails, the connecting block is located in the cavity, the first sliding groove is formed in the connecting block corresponding to the position of the two cutting blades, the slot size of the first sliding groove is smaller than the cavity size, the two first sliding grooves are gradually opened from bottom to top, the sliding rod is slidably connected in the hole channel, the lower end of the sliding rod is fixedly connected with the connecting block, the outer circumferential surface of the sliding rod is recessed to form a groove, the pushing part is arranged in the groove, the pushing part is used for providing upward elastic force to the sliding rod, the first limiting part is arranged in the installation cavity, the first limiting part is used for limiting the position of the upper end of the sliding rod, the first limiting part can also release the limitation of the upper end of the sliding rod, and the two first sliding rails are fixedly connected with the two cutting blades one by one.

4. The puncture core according to claim 3, characterized in that: The inner side wall of the two first sliding rails is recessed to form a strip-shaped groove, and the strip-shaped groove is arranged along the length direction of the first sliding rail; The driving part further includes two limiting rods, the two limiting rods are fixedly arranged on the inner side wall of the two first sliding grooves one by one, and the two limiting rods are slidably connected in the two strip-shaped grooves one by one; when the limiting rod abuts against the upper side wall of the corresponding strip-shaped groove, the projection of the two cutting blades on a horizontal plane is completely located in the projection range of the hole channel on the horizontal plane; The lower ends of the two first sliding rails are connected to the upper end of the puncture cone in a manner that can slide horizontally along a direction parallel to the mounting hole; neither of the two first sliding rails can move up and down relative to the puncture cone.

5. The puncture core according to claim 3, characterized in that: The recess is in the form of an annular structure coaxial with the sliding rod; The pushing part comprises a fixing ring and a spiral spring, the fixing ring is annularly arranged at the middle part of the portion of the sliding rod surrounded by the recess, the fixing ring is fixedly arranged on the side wall of the hole, and the spiral spring is sleeved on the portion of the sliding rod surrounded by the recess, the upper end of the spiral spring abuts against the upper side wall of the recess, and the lower end of the spiral spring abuts against the fixing ring.

6. The puncture core according to claim 3, characterized in that: The first limiting part comprises a limiting seat and an ice column, the limiting seat is fixedly arranged on the lower side wall of the mounting cavity, an accommodating cavity is formed in the limiting seat, the lower end of the accommodating cavity is connected with the upper end of the hole, the ice column is arranged in the accommodating cavity, and the lower end of the ice column abuts against the upper end of the sliding rod.

7. The piercing core of claim 6, wherein: The accommodating cavity is in the form of a cylinder, and the accommodating cavity is connected with the upper side of the limiting seat; The first limiting part further comprises a circular plate, the circular plate is matched with the accommodating cavity, the circular plate is fixedly arranged on the upper end of the accommodating cavity, a first through hole is formed in the middle part of the circular plate, the hole wall of the first through hole is in the form of a conical surface, the lower end of the hole wall of the first through hole is outwardly flared and connected with the lower end of the outer circumferential surface of the circular plate; An exhaust hole is formed in the fixing seat, the exhaust hole is arranged opposite to the first through hole, and the diameter of the exhaust hole is larger than the diameter of the first through hole.

8. The puncture core according to claim 7, characterized in that: The upper end of the sliding rod protrudes upward to form a first protrusion, the cross section of the first protrusion is non-circular, and the first protrusion is embedded in the ice column; The limiting seat comprises a first cylinder, a second cylinder, a sealing cylinder and a rotating part, the inner cavity of the first cylinder is the accommodating cavity, a plurality of second protrusions are protruded inward from the inner circumferential surface of the first cylinder, the distance from the inner side surface of the second protrusion to the axis of the first cylinder is smaller than the distance from the upper end edge of the first through hole to the axis of the first cylinder, the second protrusion is embedded in the ice column, a plurality of second through holes are formed in the cylinder wall of the first cylinder, the lower end of the second cylinder is fixedly arranged on the lower side wall of the mounting cavity, the second cylinder is annularly arranged around the first cylinder, an annular cavity is formed in the second cylinder, the annular cavity contains a substance that generates heat when meeting water, a plurality of third through holes are formed in the inner side wall of the annular cavity, the plurality of third through holes correspond to the plurality of second through holes one by one, the sealing cylinder is arranged between the first cylinder and the second cylinder, the inner side surface of the sealing cylinder is fixedly bonded to the outer side surface of the first cylinder, the sealing cylinder seals the gap between the first cylinder and the second cylinder, a fourth through hole is formed in the sealing cylinder opposite to the position of each second through hole, when the ice column melts to separate from the second protrusion, the rotating part drives the first cylinder to rotate, so that the second through hole is aligned with the corresponding third through hole.

9. The puncture core of claim 8, wherein: The upper end of the first cylinder is located above the second cylinder, and the outer circumferential surface of the upper part of the first cylinder is recessed inward to form an annular groove. The rotating part comprises a third cylinder, a torsion spring and a second limiting part, the upper end of the third cylinder is fixedly connected with the top wall of the mounting cavity, the upper part of the first cylinder is rotationally fitted in the third cylinder, the torsion spring is sleeved on the third cylinder, the upper end of the torsion spring is fixedly connected with the third cylinder and the lower end is fixedly connected with the first cylinder, and the second limiting part is used for limiting the rotation angle of the first cylinder, so that the first cylinder cannot rotate when the second through hole is aligned with the corresponding third through hole.

10. A laparoscopic trocar for gastrointestinal surgery, characterized in that: A piercing core according to any one of claims 1 to 9.

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