CN213249541U - Pushing mechanism and disposable circumcision anastomat - Google Patents

Abstract

The utility model discloses a pushing mechanism and disposable circumcision anastomat, this circumcision anastomat still includes the nail storehouse subassembly, interior ring base subassembly and girdling sword, the nail storehouse subassembly includes a nail section of thick bamboo, install in the nail storehouse of nail section of thick bamboo distal end, and the nail section of thick bamboo that pushes away in the nail section of thick bamboo is located in the activity, interior ring base subassembly includes the inner ring seat, install in the needle hammering block of inner ring seat near-end edge, the sword hammering block of embedding needle hammering block, pushing mechanism includes the casing, the nail pushing rod, guide rail and gear, the guide rail has the rack, the gear is fixed in the casing through the round pin axle, and wheel and rack toothing, the gear is equipped with the handle, the nail pushing rod cover is equipped with reset spring, the nail pushing rod near-end is connected in the guide rail, the nail section of thick bamboo is connected to the distal end, reset spring and nail section of. The utility model discloses but the singlehanded percussion through gear formula pushing mechanism, ensures that the drive ratio is invariable in the twinkling of an eye, and the at utmost guarantees the identical nail shaping, and the circular cutting precision is high, almost do not have and bleed, the incision levels beautifully.

Description

Pushing mechanism and disposable circumcision anastomat

Technical Field

The utility model relates to the technical field of medical equipment, more specifically relates to a pushing mechanism and disposable circumcision anastomat.

Background

The prepuce is too long and phimosis is a common reproduction problem for men. With the continuous improvement of living standard and health consciousness of people, higher requirements are put forward on self reproductive health. The prepuce is too long and easy to store dirt and dirt, and if it is not cleaned in time, it will cause inflammation, even cause cancer of penis, cause sterility and premature ejaculation. Most people are willing to accept circumcision at present, and the treatment effect is good. At present, the surgery mainly comprises the traditional ring cutting, laser surgery and the like. The traditional circular incision operation is easy to bleed, long in operation time, uneven in incision, unattractive in wound, long in recovery time, low in operation success rate and needs doctors with abundant experience to perform the operation. Laser surgery tends to scorch the foreskin.

At present, the circumcision anastomat is also proposed clinically for operation, most of the circumcision anastomats are triggered by a double handle, but the circumcision anastomat has some defects: on one hand, the handle has large gear span, can be operated by both hands of a doctor, and is easy to cause uneven force application of both hands to influence the operation; on the other hand, because of adopting a surface contact pushing structure, the patient needs to be fired forcibly, and the operation difficulty is increased; and the existing instrument has short stroke and small stress after being fired, so that the nail forming is not ideal enough.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a convenient operation, but one-hand firing, ring cutting precision height, incision level and smooth pleasing to the eye disposable circumcision anastomat, its pushing mechanism can guarantee that the anastomotic nail shaping is more excellent.

According to the utility model discloses an aspect provides an pushing mechanism, this pushing mechanism is used for circumcision anastomat, this pushing mechanism includes casing, ejector pin pole, guide rail and gear, the guide rail is equipped with the rack, the center of gear is equipped with the round pin hub fixation casing, and gear and rack toothing, the gear is equipped with the eccentric orfice, the eccentric orfice is connected with the handle, ejector pin pole cover is equipped with reset spring, the near-end of ejector pin pole is connected in the ejector pin section of thick bamboo of guide rail, ejector pin pole's distal end connection circumcision anastomat, reset spring's distal end and circumcision anastomat's nail section of thick bamboo butt. Therefore, the pushing mechanism is applied to the circumcision anastomat and used for driving the nail pushing barrel to realize the ejection forming suture of the anastomosis nail and the ejection cutting of the girdling knife; the far end of the reset spring props against the nail barrel, an operator applies force to the handle, the gear rotates around a pin shaft at the center of the gear, the gear is meshed with the rack, the guide rail advances to drive the nail pushing barrel, the nail pushing barrel pushes an anastomosis nail of the circumcision anastomat to enable the anastomosis nail to be ejected out for forming so as to realize suturing on the physiological tissue, and the ring cutter also cuts redundant physiological tissue along with the advance of the nail pushing barrel; the pushing mechanism adopts a gear type, the instantaneous transmission ratio is constant, the transmission precision is high, the working stability is high, the transmission power is high, the bearing capacity is high, the percussion hand feeling is improved, the structural stroke of the gear type pushing mechanism can be designed to be large, the extrusion forming effect of the anastomosis nail can be better, and the cut is smooth and attractive.

In some embodiments, the distal end of the guide rail is provided with a connecting rod, the connecting rod is connected with the proximal end of the nail pushing rod through threads, the connecting rod is provided with a first through hole, the proximal end of the guide rail is provided with a second through hole, the centers of the first through hole and the second through hole are positioned on the same axis, and the nail pushing rod is provided with a third through hole. From this, the guide rail is through the connecting rod of taking the screw thread and the installation of nail pushing rod, and simple structure sets up the first through-hole and the second through-hole of aligning and the third through-hole of nail pushing rod, is convenient for install fixed ring base subassembly in the tissue of waiting to cut, when the guide rail drive nail pushing barrel, ensures the stability of ring base subassembly in.

In some embodiments, the main body section of the guide rail adopts a hollow kidney-shaped structure, the upper plane and the lower plane of the guide rail are both provided with kidney-shaped holes, the center of the gear is provided with an avoiding groove, so that the gear forms a double-row gear structure, and correspondingly, the racks are in a double-row rack structure. Therefore, the waist-shaped hole on the lower plane of the guide rail leaves enough movable space for the handle, the avoidance groove on the gear can facilitate the installation of the inner ring seat component, and the double-row tooth structural design is adopted, so that the transmission precision during driving can be improved, and the stability of the equipment is improved.

In some embodiments, a first horizontal baffle and a second horizontal baffle are arranged in the machine shell, the first horizontal baffle is abutted against the upper plane of the guide rail, and the second horizontal baffle is abutted against the edge of the nail pushing rod. Therefore, the first horizontal baffle and the second horizontal baffle are arranged, the guide rails of the double rows of racks can be ensured to be always in a horizontal state in the advancing process, and the working stability of the anastomosis nail and the ring cutter is ensured to be pushed.

In some embodiments, the housing is provided with a hand-held portion, the handle is provided with an extension portion, and a safety mechanism is arranged between the hand-held portion and the extension portion. Therefore, the circumcision anastomat applied to the pushing mechanism is pistol-shaped in appearance, single-hand percussion is adopted, the distance of handle opening is reduced, the percussion hand feeling is improved by matching with the gear type pushing mechanism, when the fixed handheld part is held, error percussion caused by misoperation can be avoided, and the safety is further ensured through the safety mechanism.

According to another aspect of the present invention, there is provided a disposable circumcision anastomat, comprising the pushing mechanism according to any one of the above technical solutions; the nail bin assembly comprises a nail bin, a nail barrel and a nail pushing barrel, the nail bin is in a boss ring shape and is provided with nail grooves distributed annularly, anastomotic nails can be installed in the nail grooves, the nail bin is installed at the far end of the nail barrel, the nail pushing barrel can be movably arranged in the nail barrel, and nail pushing sheets distributed annularly are arranged at the far end of the nail pushing barrel; the inner ring seat assembly comprises an inner ring seat, a central screw rod, a needle anvil and a knife anvil, wherein the inner ring seat is provided with an accommodating cavity, the edge of the near end of the inner ring seat is provided with an installation surface for installing the needle anvil, the needle anvil is in a concave ring shape, the knife anvil is embedded in the needle anvil, the end surface of the near end of the needle anvil is provided with forming grooves which are distributed annularly, the far end of the central screw rod is connected with the inner ring seat, and the near end of the central screw rod penetrates through the nail pushing cylinder and the machine shell to be connected with an adjusting nut through threads; and the ring-cutting knife is arranged on the nail pushing barrel.

Therefore, the inner ring seat is detachably connected with the far end of the machine shell, the inner ring seat assembly is taken out, the protected physiological tissue (glans penis) is placed in the containing cavity of the inner ring seat, the operated target physiological tissue (foreskin) is fixed outside the inner ring seat, the far end of the central screw rod sequentially passes through the nail pushing barrel, the third through hole of the nail pushing rod, the first through hole of the connecting rod, the second through hole of the guide rail and the tail end of the machine shell, the central screw rod is connected through the adjusting nut, the adjusting nut is screwed, so that the needle anvil and the nail bin clamp the target physiological tissue, the handle is pulled, the gear rotates around the central pin shaft of the gear and is meshed with the rack through the gear, the guide rail advances, the return spring is compressed, the nail pushing barrel connected with the nail pushing rod advances along with the guide rail, the ring cutter advances along with the nail pushing barrel to cut the target physiological tissue, the ring cutter cuts the target, meanwhile, a nail pushing sheet of the nail pushing barrel is inserted into a nail groove of the nail bin, anastomotic nails in the nail groove are pushed to a needle anvil by the nail pushing sheet and are formed at a forming groove through extrusion, and suturing of target physiological tissues is achieved. After the circumcision anastomat is triggered, the handle is released, the reset spring is released to a free state, the guide rail drives the nail pushing cylinder to retreat, and the nail pushing sheet and the circular cutter are restored to the initial positions; and the adjusting nut is rotated reversely, the central screw rod drives the inner ring seat to move towards one side far away from the machine shell, the nail bin and the needle anvil are in a far-away state, and the cut and sutured target physiological tissues are separated from the inner ring seat at the moment.

In some embodiments, the far end of the nail barrel is provided with a limiting protruding buckle, the nail bin is provided with a limiting clamping groove matched with the limiting protruding buckle, the near end of the nail barrel is provided with a cross-shaped limiting block, the nail pushing barrel is provided with a limiting groove matched with the cross-shaped limiting block, the far end of the nail pushing rod is provided with a limiting lug, the nail pushing barrel is provided with a tail clamping groove matched with the limiting lug, the side edge of the nail groove is provided with a positioning groove, and the side edge of the nail pushing piece is provided with a positioning protrusion matched with the positioning groove. Therefore, the nail bin and the nail barrel are mounted through the limiting protrusion buckle and the limiting clamping groove, and the mounting is very quick; the working stability of the nail pushing barrel in the moving process can be ensured by the matching of the cross-shaped limiting block and the limiting groove; when the anastomotic nail in the nail groove is pushed, when the nail pushing sheet is inserted into the nail groove, the stability of the anastomotic nail extruded by the nail pushing sheet can be ensured through the guiding of the positioning bulge and the positioning groove.

In some embodiments, the inner wall of the needle anvil is provided with an annular clamping groove, the outer wall of the knife anvil is provided with a buckle matched with the annular clamping groove, the near end of the inner annular seat is provided with a connecting rod, the near end of the connecting rod and the far end of the central screw rod are both provided with anti-slip grooves, and the near end of the connecting rod and the far end of the central screw rod are connected through rubber coating. From this, the sword hammering block passes through the buckle and imbeds in the ring groove of needle hammering block, and the installation is convenient and stable.

In some embodiments, the disposable circumcision anastomat further comprises an auxiliary sheet, the auxiliary sheet is made of elastic materials, a positioning clamping groove is formed in the far end surface of the nail bin, and a positioning buckle matched with the positioning clamping groove is arranged on the auxiliary sheet. Therefore, the elastic auxiliary sheet is arranged on the end face of the nail bin, the target biological tissue is clamped between the needle anvil and the auxiliary sheet, when the extrusion anastomosis nail is formed and the cutting target biological tissue is cut by the girdling knife, the damage to the peripheral biological tissue can be reduced through the auxiliary sheet, and the extrusion hemostasis effect can be achieved.

In some embodiments, the maximum stroke of the pushing mechanism driving the nail pushing barrel to advance is 7 mm. Therefore, the stroke of the nail pushing cylinder is large, the extrusion force is large, complete cutting can be guaranteed when the ring cutter cuts target biological tissues, the cut is guaranteed to be flat and attractive, and meanwhile, the formation of anastomosis nails is guaranteed to the maximum extent.

Compared with the prior art, the beneficial effects of the utility model are that: the pushing mechanism and the disposable circumcision anastomat using the same provided by the utility model can be triggered by one hand, the operation is convenient, the gear type pushing mechanism ensures constant instantaneous transmission ratio, high bearing capacity and good stability, simultaneously increases the motion stroke of the nail pushing cylinder, ensures the formation of anastomotic nails to the maximum extent and also ensures the cutting of the ring cutter in place; the circumcision anastomat is used for surgery, the surgery time is short, the circumcision precision is high, almost no bleeding exists, the incision is flat and attractive, and the postoperative recovery is fast.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the disposable circumcision anastomat of the invention;

FIG. 2 is an exploded view of the disposable circumcision stapler;

FIG. 3 is a schematic structural view of a needle magazine, wherein FIG. 3A is a left side view of the needle magazine and FIG. 3B is a right side view of the needle magazine;

FIG. 4 is a schematic structural view of the cartridge, wherein FIG. 4A is a left side view of the cartridge and FIG. 4B is a front view of the cartridge;

FIG. 5 is a schematic structural view of the staple pusher, wherein FIG. 5A is a front view of the staple pusher, FIG. 5B is a left side view of the staple pusher, and FIG. 5C is a top view of the staple pusher;

FIG. 6 is a schematic structural view of the needle anvil, wherein FIG. 6A is a schematic right side view of the needle anvil, and FIG. 6B is a schematic perspective view of the needle anvil;

FIG. 7 is a schematic structural view of an anvil, wherein FIG. 7A is a schematic right side view of the anvil, and FIG. 7B is a schematic perspective view of the anvil;

FIG. 8 is a schematic view of the construction of a sub-sheet, wherein FIG. 8A is a left side view of the sub-sheet, FIG. 8B is a right side view of the sub-sheet, and FIG. 8C is a side view of the sub-sheet;

FIG. 9 is a schematic view of the construction of a ring cutter;

FIG. 10 is a schematic structural view of the inner housing assembly;

FIG. 11 is a schematic view of the adjusting nut;

FIG. 12 is an exploded view of the guide rail and the ejector pin shank;

FIG. 13 is a top view of the guide rail;

FIG. 14 is a schematic structural view of the ejector pin shank;

FIG. 15 is a schematic view of the installation of the gear and handle, wherein FIG. 15A is an exploded schematic view of the gear and handle, FIG. 15B is a front view of the gear, and FIG. 15C is a side view of the gear;

FIG. 16 is a schematic structural view of a staple;

FIG. 17 is a schematic view of the structure of the housing;

FIG. 18 is a schematic view of the installation of the inner ring seat, needle anvil and knife anvil.

Detailed Description

The present invention will be further described with reference to the following embodiments.

The words expressing the position and direction described in the utility model are all referred by the operator of the instrument, the end close to the operator is the near end, and the end far away from the operator is the far end.

In the embodiment of the present invention, the pushing mechanism and the disposable circumcision stapler using the pushing mechanism are specifically explained by taking the circumcision stapler as an example, but it should be noted that the technical spirit involved in the following embodiment may be alternatively utilized to other types of staplers.

As shown in fig. 1 and 2, in one embodiment of the present invention, the disposable circumcision stapler is used to apply a plurality of staples to the physiological tissue of the human body (herein, foreskin) while correspondingly cutting the excess biological tissue.

A disposable circumcision anastomat comprises a pushing mechanism 1, a nail bin assembly 2, an inner ring base assembly 3 and a girdling knife 4. The distal end of the inner ring base assembly 3 can receive protected tissue (glans), and the inner ring base assembly 3 can slightly move towards the proximal end or the distal end relative to the nail cartridge assembly 2. The pushing mechanism 1 is used for pushing staples in the staple cartridge assembly 2 to form and suture, and can drive the girdling knife 4 to cut operated target physiological tissues (foreskin).

The cartridge module 2 includes a cartridge 21, a cartridge 22, and a staple pusher 23. The distal end of the nail-pushing cylinder 23 is provided with nail-pushing sheets 230 distributed annularly, and the nail-pushing cylinder 23 can be movably arranged in the nail cylinder 22. The cutting ring cutter 4 is arranged in the nail pushing barrel 23 through the clamping piece 41 and the small hole 42 (shown in figure 9), and the cutting ring cutter 4 is positioned at the inner side of the nail pushing piece 230. As shown in fig. 3, the staple cartridge 21 is in the shape of a circular boss, and the staple cartridge 21 is provided with staple grooves 210 distributed annularly, and staples 100 (shown in fig. 16) can be placed in the staple grooves 210. The distal end of the nail barrel 22 is provided with a limit protrusion buckle 221 (as shown in fig. 4), the nail bin 21 is provided with a limit clamping groove 211 matched with the limit protrusion buckle 221, and the nail bin 21 is arranged at the distal end of the nail barrel 22. The nail bin 21 and the nail barrel 22 are mounted through the limiting protrusion fastener 221 and the limiting clamping groove 211, and the mounting is very quick.

As shown in fig. 2, 12 to 15, the pushing mechanism 1 includes a housing 10, a nail pushing bar 11, a guide rail 12, and a gear 13. The guide rail 12 is provided with a rack 120, the center of the gear 13 is fixed to the housing 10 by a pin 131, and the gear 13 is engaged with the rack 120. The gear 13 is provided with an eccentric hole 132, and the handle 133 is connected to the eccentric hole 132. The proximal end of the nail pushing rod 11 is connected to the guide rail 12, the distal end of the nail pushing rod 11 is connected to a nail pushing cylinder 23 of the circumcision anastomat, specifically, the distal end of the nail pushing rod 11 is provided with a limiting projection 112, and the nail pushing cylinder 23 is provided with a tail clamping groove 231 matched with the limiting projection 112. The nail pushing rod 11 is sleeved with a return spring 14, and the distal end of the return spring 14 is abutted with a nail barrel 22 of the circumcision anastomat.

The pushing mechanism 1 is applied to a circumcision anastomat and used for driving the nail pushing barrel 23 to realize ejection forming suturing of anastomosis nails and ejection cutting of the girdling knife 4. The distal end of the return spring 14 props against the nail barrel 22, an operator applies force to the handle 133, the gear 13 rotates around the central pin shaft 131, the gear 13 is meshed with the rack 120, the guide rail 12 advances to drive the nail pushing barrel 23, the nail pushing barrel 23 pushes staples of the circumcision anastomat to enable the staples to be ejected out for forming, so that the suturing tissue is sutured, and the ring-cutting knife 4 cuts redundant tissue along with the advancing of the nail pushing barrel 23. This pushing mechanism 1 adopts the gear 13 formula, and instantaneous drive ratio is invariable, and transmission precision is high, and job stabilization nature is high, and transmission power is big, and bearing capacity is high, has improved the percussion and has felt, and gear formula pushing mechanism's structure stroke can be designed greatly, enables that the anastomotic nail extrusion effect is more excellent, and the incision is level and smooth pleasing to the eye.

As shown in FIGS. 4 and 5, the proximal end of the staple cartridge 22 has a cross-shaped stopper 222, and the staple pusher 23 has a stopper groove 232 that mates with the cross-shaped stopper 222. The working stability of the nail pushing barrel 23 in the moving process can be ensured by the matching of the cross-shaped limiting block 222 and the limiting groove 232. A positioning groove 2101 is arranged on the side edge of the nail groove 210, and a positioning projection 2301 matched with the positioning groove 2101 is arranged on the side edge of the nail pushing sheet 230. When pushing staples in the staple groove 210, the stability of the staple sheet 230 pressing the staples can be ensured by the guide of the positioning protrusions 2301 and the positioning recesses 2101 when the staple sheet 230 is inserted into the staple groove 210.

As shown in fig. 2, the inner ring holder assembly 3 includes an inner ring holder 31, a center screw 32, a needle anvil 33, and a knife anvil 34.

As shown in fig. 10, the main body of the inner ring seat 31 has a conical shape, a receiving cavity 310 for receiving the glans penis is formed at the distal end of the inner ring seat 31, and the receiving cavity 310 has a hollow structure. The far end of the central screw rod 32 is connected with the inner ring seat 31, specifically, the near end of the inner ring seat 31 is provided with a connecting rod 311, the near end of the connecting rod 311 and the far end of the central screw rod 32 are both provided with anti-slip grooves, and the near end of the connecting rod 311 and the far end of the central screw rod 32 are connected through an encapsulation 321. The proximal end of the central screw 32 passes through the staple pusher 23 and the housing 10 and is threadedly connected with an adjusting nut 35 (shown in fig. 11). The adjusting nut 35 is conical with two protruding flats and is integrally formed by encapsulating a threaded member.

As shown in fig. 2 and 18, the proximal edge of the inner ring seat 31 forms a mounting surface 312 for mounting the needle anvil 33, the mounting surface 312 has a circumferential positioning catch (not shown), and the end surface of the needle anvil 33 has a catching groove 331 (shown in fig. 6) for cooperating with the circumferential positioning catch. The needle anvil 33 has a concave circular ring shape, and the knife anvil 34 is fitted into the needle anvil 33. Specifically, as shown in fig. 6 and 7, an annular groove 332 is formed in the inner wall of the needle anvil 33, a buckle 341 engaged with the annular groove 332 is formed in the outer wall of the knife anvil 34, and the knife anvil 34 is embedded into the annular groove 332 of the needle anvil 33 through the buckle 341, so that the installation is convenient and stable. The proximal end face of the needle anvil 33 has a ring-shaped profile groove 330.

As shown in fig. 2 and 8, the disposable circumcision stapler further includes an auxiliary plate 5. The auxiliary sheet 5 is made of elastic material, the far end surface of the nail bin 21 is provided with a positioning clamping groove 212, and the auxiliary sheet 5 is provided with a positioning buckle 51 matched with the positioning clamping groove 212. The elastic auxiliary sheet 5 is arranged on the end face of the nail bin 21, the target biological tissue is clamped between the needle anvil 33 and the auxiliary sheet 5, when the extrusion anastomosis nail is formed and the girdling knife 4 cuts the target biological tissue, the damage to the peripheral biological tissue can be reduced through the auxiliary sheet 5, and the extrusion hemostasis effect can be achieved.

As shown in fig. 12 to 14, the distal end of the guide rail 12 is provided with a connecting rod 121, and the connecting rod 121 is connected to the proximal end of the pusher rod 11 by screw threads. The connecting rod 121 is provided with a first through hole 1211, the proximal end of the guide rail 12 is provided with a second through hole 122, the centers of the first through hole 1211 and the second through hole 122 are located on the same axis, and the center of the nail pushing rod 11 is provided with a third through hole 111. The guide rail 12 is installed with the nail pushing rod 11 through the connecting rod 121 with threads, and the structure is simple. The first and second through holes 1211 and 122 aligned with each other and the third through hole 111 of the staple pushing lever 11 are provided to facilitate installation of the center screw 32 for fixing the inner ring holder assembly 3 for tissue to be cut, and to ensure stability of the inner ring holder assembly 3 when the guide rail 12 drives the staple pusher 23.

The main section of the guide rail 12 adopts a hollow kidney-shaped structure. Waist-shaped holes 123 are arranged on the upper plane and the lower plane of the guide rail 12. As shown in fig. 15, the gear 13 is provided with an avoiding groove 134 at the center thereof to form the gear 13 into a double-row gear structure, and correspondingly, the rack 120 has a double-row rack structure. The kidney-shaped aperture 123 in the lower plane of the rail 12 allows sufficient room for the handle 133 to move. The avoiding groove 134 on the gear 13 can facilitate the installation of the inner ring seat component 3, and the double-row tooth structure design is adopted, so that the transmission precision during driving can be improved, and the stability of the equipment is improved.

As shown in fig. 17, a first horizontal baffle 101 and a second horizontal baffle 102 are provided in the casing 10, the first horizontal baffle 101 abuts against the upper plane of the guide rail 12, and the second horizontal baffle 102 abuts against the edge of the nail pushing bar 11. The arrangement of the first horizontal baffle 101 and the second horizontal baffle 102 can ensure that the guide rails 12 of the double rows of racks are always in a horizontal state in the advancing process, and ensure the working stability of pushing the staples and the ring cutter 4.

As shown in fig. 2, the handle 133 of the lower hand-held portion 103 of the housing 10 is provided with an extension portion 1331, and a safety mechanism 104 is provided between the hand-held portion 103 and the extension portion 1331. The disposable circumcision anastomat is pistol-shaped in appearance, single-hand percussion is adopted, the distance of the handle 133 in opening is reduced, the percussion hand feeling is improved by matching with the gear type pushing mechanism, error percussion caused by misoperation can be avoided when the fixed handheld part 103 is held, and the safety is further ensured through the safety mechanism 104.

The utility model discloses in, can set for the biggest stroke that pushing mechanism 1 drive pushed away a nail section of thick bamboo 23 and go forward and be 7 mm. The nail pushing cylinder 23 has a large stroke and a large extrusion force, can ensure that the cutting knife 4 can cut target biological tissues completely, ensures that cuts are smooth and attractive, and simultaneously ensures that anastomotic nails are formed to the maximum extent.

The working process of the disposable circumcision anastomat comprises the following steps: the inner ring seat 31 is detachably connected to the far end of the casing 10, the inner ring seat assembly 3 is taken out, the protected tissue (glans penis) is placed in the containing cavity 310 of the inner ring seat 31, and the operated target tissue (foreskin) is fixed outside the inner ring seat 31. The distal end of the central screw 32 passes through the nail pushing cylinder 23, the third through hole 111 of the nail pushing rod 11, the first through hole 1211 of the connecting rod 121, the second through hole 122 of the guide rail 12 and the end of the housing 10 in sequence, and the central screw 32 is connected through the adjusting nut 35. The adjustment nut 35 is screwed so that the needle anvil 33 and the staple cartridge 21 clamp the target tissue. When the handle 133 is pulled, the gear 13 rotates around the central pin 131, the gear 13 is engaged with the rack 120, the guide rail 12 advances, the return spring 14 is compressed, and the staple pushing cylinder 23 connected with the staple pushing rod 11 advances along with the guide rail 12. The cutting knife 4 cuts the target physiological tissue along with the advance of the staple pushing cylinder 23, the cutting knife 4 cuts the target physiological tissue and then is abutted against the knife anvil 34, meanwhile, the staple pushing sheet 230 of the staple pushing cylinder 23 is inserted into the staple groove 210 of the staple cartridge 21, the anastomotic staples in the staple groove 210 are pushed to the needle anvil 33 by the staple pushing sheet 230, and the staple staples are formed at the forming groove 330 through extrusion, so that the target physiological tissue is sutured. After the circumcision anastomat is fired, the handle 133 is released, the return spring 14 is released to a free state, the guide rail 12 drives the nail pushing cylinder 23 to retreat, and the nail pushing sheet 230 and the girdling knife 4 return to the initial positions. When the adjusting nut 35 is rotated reversely, the central screw 32 drives the inner ring seat 31 to move towards the side away from the casing 10, the nail bin 21 and the needle anvil 33 are in a separated state, and at this time, the cut and sutured target physiological tissues are separated from the inner ring seat 31.

The utility model provides a pushing mechanism 1 and the disposable circumcision anastomat who uses thereof can the one-hand percussion, convenient operation. Through gear formula pushing mechanism, guarantee that transmission ratio is invariable, bearing capacity is high, stability is good in the twinkling of an eye, increases the motion stroke of pushing away nail section of thick bamboo 23 simultaneously, and the at utmost guarantees the anastomotic nail shaping, also guarantees that the cutting of girdling sword 4 targets in place. The circumcision anastomat is used for surgery, the surgery time is short, the circumcision precision is high, almost no bleeding exists, the incision is flat and attractive, and the postoperative recovery is fast.

The foregoing is only a few embodiments of the present invention, and it should be noted that, for those skilled in the art, other modifications and improvements can be made without departing from the inventive concept of the present invention, and all of them belong to the protection scope of the present invention.

Claims (10)

1. The pushing mechanism is used for a circumcision anastomat and is characterized by comprising a casing, a nail pushing rod, a guide rail and a gear, wherein the guide rail is provided with a rack, the center of the gear is provided with a pin shaft fixed on the casing and meshed with the rack, the gear is provided with an eccentric hole, the eccentric hole is connected with a handle, a reset spring is sleeved on the nail pushing rod, the near end of the nail pushing rod is connected with a nail pushing barrel of the circumcision anastomat through the far end of the guide rail and the nail pushing rod, and the far end of the reset spring is abutted to the nail barrel of the circumcision anastomat.

2. The pushing mechanism as claimed in claim 1, wherein the distal end of the guide rail is provided with a connecting rod, the connecting rod is connected with the proximal end of the nail pushing rod through a screw thread, the connecting rod is provided with a first through hole, the proximal end of the guide rail is provided with a second through hole, centers of the first through hole and the second through hole are on the same axis, and the nail pushing rod is provided with a third through hole.

3. The pushing mechanism as claimed in claim 2, wherein the main body of the guide rail has a hollow kidney-shaped structure, the upper and lower planes of the guide rail are provided with kidney-shaped holes, the center of the gear is provided with an avoiding groove, so that the gear forms a double-row gear structure, and correspondingly, the rack has a double-row rack structure.

4. The pushing mechanism as claimed in claim 3, wherein a first horizontal baffle and a second horizontal baffle are provided in the housing, the first horizontal baffle abuts against the upper plane of the guide rail, and the second horizontal baffle abuts against the edge of the nail pushing rod.

5. The pushing mechanism as recited in claim 4 wherein the housing has a handle portion, the handle has an extension portion, and a safety mechanism is disposed between the handle portion and the extension portion.

6. The disposable circumcision anastomat is characterized by comprising

The pushing mechanism of any one of claims 1 to 5;

the nail bin assembly comprises a nail bin, a nail barrel and a nail pushing barrel, the nail bin is in a boss ring shape and is provided with nail grooves distributed annularly, anastomotic nails can be installed in the nail grooves, the nail bin is installed at the far end of the nail barrel, the nail pushing barrel is movably arranged in the nail barrel, and nail pushing sheets distributed annularly are arranged at the far end of the nail pushing barrel;

the inner ring seat assembly comprises an inner ring seat, a central screw rod, a needle anvil and a knife anvil, wherein the inner ring seat is provided with an accommodating cavity, the edge of the near end of the inner ring seat is provided with an installation surface for installing the needle anvil, the needle anvil is in a concave ring shape, the knife anvil is embedded in the needle anvil, the end surface of the near end of the needle anvil is provided with forming grooves which are distributed annularly, the far end of the central screw rod is connected with the inner ring seat, and the near end of the central screw rod penetrates through the nail pushing cylinder and the shell to be connected with an adjusting nut through threads;

and the ring-cutting knife is arranged on the nail pushing barrel.

7. The disposable circumcision anastomat as claimed in claim 6, wherein the distal end of the nail barrel is provided with a limit protrusion buckle, the nail bin is provided with a limit clamping groove matched with the limit protrusion buckle, the proximal end of the nail barrel is provided with a cross-shaped limit block, the nail pushing barrel is provided with a limit groove matched with the cross-shaped limit block, the distal end of the nail pushing rod is provided with a limit lug, the nail pushing barrel is provided with a tail clamping groove matched with the limit lug, the side edge of the nail groove is provided with a positioning groove, and the side edge of the nail pushing sheet is provided with a positioning protrusion matched with the positioning groove.

8. The disposable circumcision anastomat as claimed in claim 6, wherein the needle anvil is provided with a ring-shaped slot on the inner wall, the knife anvil is provided with a buckle on the outer wall for matching with the ring-shaped slot, the inner ring seat is provided with a connecting rod on the near end, the connecting rod is provided with an anti-slip slot on the near end and the far end of the central screw rod, and the near end of the connecting rod and the far end of the central screw rod are connected by encapsulation.

9. The disposable circumcision anastomat as claimed in claim 6, further comprising an auxiliary sheet, wherein the auxiliary sheet is made of elastic material, the distal surface of the nail bin is provided with a positioning slot, and the auxiliary sheet is provided with a positioning buckle matched with the positioning slot.

10. The disposable circumcision stapler according to claim 6, wherein the maximum stroke of the pushing mechanism driving the staple pushing cylinder to advance is 7 mm.

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