TWI690295B - Surgical clip applier with automatic unhooking function - Google Patents

Abstract

A surgical clip applier with automatic unhooking function has a outer tube, a jaw structure being placed to a front end of the outer tube, clips being placed behind the jaw, a reciprocating pushing assembly and a clip pushing assembly being placed inside the outer tube, a sliding sleeve being placed on a back end of the outer tube to mount two sliding devices used for controlling the reciprocating pushing assembly and the clip pushing assembly, a spring being compressed and clipped by the two sliding devices. The reciprocating pushing assembly and a second sliding device of the two sliding devices form an automatically unhooking structure.. The second sliding device can be driven backward by the spring when the first sliding device is driven forward. Since the operation only needs to drive the first sliding device to complete all the actions, rotation amplitude of a trigger is not limited while using a handle. A better experience of pressing the trigger is achieved.

Description

Blood vessel clip applying device with automatic decoupling

The invention relates to a structure of a surgical instrument, in particular to a blood vessel clip applying device capable of retreating an upper nail push rod by an automatic decoupling structure.

In the course of laparoscopic surgery, the blood vessel needs to be closed to avoid blood loss from the incision at the surgical site. At this time, a surgical instrument that closes the blood vessel, such as a vascular clip applier, is used to close the blood vessel. The above-mentioned blood vessel clip applier is mainly used to extend the long rod-shaped clip applier unit of the blood vessel applier into the human body through the opening cut out from the surface of the human body, and then operate the grip part to drive the clip applier unit to apply the clip The clamping portion at the front end of the unit clamps the blood vessel clamp that is sequentially delivered to the inside of the clamping portion, and the blood vessel clamp is pressed against the blood vessel to close the blood vessel.

The existing vascular clip applier is used to protrude a long rod-shaped clip applicator unit into the human body during surgery. For example, TW Patent Application No. 104118985 "Automatic Clip Applicator" invention patent application (Publication No. 201642812 ), a clip applying unit is provided inside the outer sleeve, a clip portion is provided at the front end of the clip application unit, and a clip entry unit for pushing forward each blood vessel clip is provided in cooperation with the clip portion. At the rear end of the clip application unit A first sleeve and a second sleeve are set at the front and rear positions, and the clamping part is clamped by the action of the first sleeve moving forward, and the front part of the first sleeve moving process will drive the second sleeve When the pipe moves forward, the second casing will move out of the state of co-movement with the first casing at the later stage of the advancement process of the first casing. At this time, the second casing is driven to move backward, and the second casing is used to move forward and backward. The clamping unit can be driven to advance a blood vessel clamp into the inner side of the clamping part for clamping the clamping part.

The clip applying unit of the above-mentioned existing automatic clip applier is installed in a holding unit, pressing the trigger of the holding unit to link a link mechanism, and driving the first sleeve and the second sleeve through the link mechanism The tube performs all the above-mentioned actions, but because the link mechanism needs to drive the first and second sleeves at the same time, the mutual influence of the movement strokes of the first and second sleeves must be considered, so the action stroke of the trigger, such as the trigger pivot The position connected to the grip unit and the amplitude of the trigger swing are limited. In addition to the fact that the trigger cannot be designed as an efficient lever structure, the structure that requires the second sleeve to move backward through the link mechanism in the second half of the stroke is also allowed to use The person cannot press the trigger smoothly to apply force. On the whole, since the clip application unit of the existing automatic clip applier is almost designed to use a trigger to control the movement of all operating rods or sleeves, it is difficult to avoid the above-mentioned problem of the limited trigger action design.

Because the existing clip applying unit is installed when the holding unit is in use, a link mechanism is used to simultaneously drive the first and second sleeves of the clip applying unit. Therefore, the design of the trigger structure of the holding unit is limited and the force applied by pressing the trigger is uneven The problem. For this reason, the design of the present invention uses a decoupling structure and a spring so that all operations need only be driven by the first sleeve. The trigger design of the matched grip unit is not limited and the user has a better experience when pressing the trigger Effect.

In order to achieve the above object, the present invention provides an automatic decoupling vascular clip applicator. Its structure includes: an outer tube, a sliding sleeve is connected to the rear end of the outer tube, and the front and rear sides of the sliding sleeve Each of them penetrates a long hole of a push pin and a long hole of a decoupling pin in the radial direction, a slope is formed at the front end of the long hole of the decoupling pin; a nail assembly on the pliers mouth is inserted in the outer tube and is provided with a pliers at the front end Mouth, a jaw portion is formed at the front end of the jaw mouth, and a track is formed behind the jaw portion, and more than two clip nails are successively provided in the track from front to back; An upper nail push rod, the upper nail push rod is penetrated in the outer tube and is provided with a nail pick at the front end, and the nail push push rod can drive the frontmost nail to enter the jaw portion with the nail pick A rear long hole of the upper nail push rod and a hole of the upper nail push rod are respectively penetrated at the front and rear positions of the rear end portion of the upper nail push rod; a covering push rod assembly, the covering push rod assembly is passed through the outer tube Inside and capable of driving the jaw portion of the jaws to be clamped, the covering push rod assembly is provided with a covering push rod, cooperating with the position of the long hole behind the nail push rod, at the rear end of the covering push rod A covering push rod hole is penetrated, a recess is formed inwardly at the rear end side of the covering push rod, a barb is formed adjacent to the rear side of the notch, the barb and the opening of the notch are formed The edges on the same side are inclined edges; and an engagement drive assembly is that a first sleeve and a second sleeve are sleeved on the front and back positions of the sliding sleeve, respectively, on the first sleeve and the second sleeve There is a drive spring in a compressed state between the abutment; a push pin is combined with the first sleeve, the push pin passes through the long hole behind the push rod of the upper nail and is inserted in the hole of the push rod; Two sleeves penetrate a second positioning pin hole, the second positioning pin hole is an elongated hole extending in the same direction as the tangent direction of the sliding sleeve, and a decoupling pin is movably inserted in the second positioning pin hole. The hook pin passes through the long hole of the decoupling pin and the notch and is inserted into the hole of the push rod of the upper nail, and the decoupling pin is hooked by the barb.

Further, the rear end of the upper nail push rod of the present invention is shifted toward the inner side of the notch, so that the upper nail push rod hole is located within the range of the inner side of the notch, so that the decoupling pin falls to the notch Inside.

Further, the height of the barb of the present invention is narrower than the depth of the front side of the notch.

Furthermore, in the present invention, a spring positioning pin hole is inserted into the rear end of the sliding sleeve, a spring positioning pin is inserted and fixed in the spring positioning pin hole, and a spring hook hole is inserted in the barb. The hook between the spring hook hole and the spring positioning pin is provided with a covering spring, so that the propelling pin abuts against the rear end of the long hole of the propelling pin.

When used in the present invention, the first sleeve is used to drive the covering push rod forward through the push pin. In the process, because the back hook of the covering push rod rear hooks the uncoupling pin, the second sleeve and the upper nail can be driven simultaneously The push rod advances together. When the first sleeve continues to advance, the decoupling pin will touch the slope of the front end of the long hole of the decoupling pin and move, so it automatically escapes from the barb, and the drive spring returns to its original state. And the second sleeve is driven to move backward, so that the first sleeve gradually advances the jaw portion of the jaw, the upper nail push rod can advance and retreat once to feed the nail into the jaw portion To complete the clip application operation of the blood vessel clip application device.

The effect of the present invention is that because the action of feeding the nail into the mouth of the jaw and clamping the mouth of the present invention benefits from the automatic decoupling structure between the first and second sleeves, it only needs to go forward The first sleeve can be driven to complete all operations on the push rod and the push rod. When the present invention is installed in the grip unit, only the first sleeve needs to be driven to complete all the actions, so that the trigger function of the grip unit of the present invention is not limited by the need to drive two sleeves at the same time. According to the requirements, the design of the trigger pivot point and the action range is designed, and because the power of the second sleeve to be driven backward is provided by the driving spring, it has nothing to do with the force of the trigger, so the user presses the trigger to drive the first sleeve There is no sudden resistance during the process, so it can apply force smoothly and provide users with a better clip operation experience.

10: Outer tube

11: Outer tube fixing long hole

20: Nail assembly

21: Nozzle lever

211: long hole of the lever of the pliers

212: fixed hole

22: jaws

221: Chuck

222: Jaw ribs

23: nail groove

231: Orbit

232: Stop

233: Positioning hole for nail pusher

234: Stop

24: Clip nail

25: nail pusher

251: positioning shrapnel

252: Push shrapnel

30: Nail push rod

31: Push hole

32: nail clip

33: Long hole after nailing the push rod

34: Nail push rod hole

35: Long hole in front of push rod

40: cover push rod assembly

41: Overlay putter

411: Cover the push rod hole

412: Cover long hole of push rod

413: Hook section

414: Notch

415: Barb

416: Spring hook hole

42: Jaw clamp

421: clamping groove

50: Connect drive assembly

501: Drive spring

51: sliding sleeve

511: Insert

512: fixed latch hole

513: Push pin long hole

514: Long hole for decoupling pin

515: Bevel

516: Spring positioning pin hole

52: fixed latch

53: First casing

531: First positioning pin hole

54: Push pin

55: second casing

551: Second positioning pin hole

56: Uncoupling

57: fixed sleeve

571: Bolt hole

58: Spring positioning pin

59: Overlap spring

A: Half tube shell

60: Holding unit

61: trigger

62: connecting rod

63: Drive seat

FIG. 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is an exploded view of a preferred embodiment of the present invention.

FIG. 3 is an exploded view of the articulated drive assembly of the preferred embodiment of the present invention.

4 is a top view of the preferred embodiment of the present invention.

5 is a bottom view of the preferred embodiment of the present invention.

6 is a schematic diagram of the implementation of the latter stage of the preferred embodiment of the present invention.

FIG. 7 is a schematic diagram of the implementation of pushing the nail pusher according to the preferred embodiment of the present invention.

FIG. 8 is a schematic diagram of the implementation of the preferred embodiment of the present invention to drive the clamping of the jaw portion.

9 is a partial cross-sectional view of a preferred embodiment of the present invention installed in the grip unit.

In order to understand the technical features and practical effects of the present invention in detail, and can be implemented in accordance with the content of the specification, the preferred embodiments shown in the drawings are further described in detail below.

Please refer to the preferred embodiment of the present invention shown in FIGS. 1 to 5. The present invention provides an automatic decoupling vascular clip applicator, which includes an outer tube 10 and a jaw that is inserted into the outer tube 10 Nail assembly 20, an upper nail push rod 30 inserted in the outer tube 10, a covered push rod assembly 40 inserted in the outer tube 10, and an articulated drive assembly connected to the rear end of the outer tube 10 50 of which:

The outer tube 10 is a circular long tube body extending in the front-rear direction, and a rear end of the outer tube 10 penetrates an outer tube fixing long hole 11 in the radial direction of the outer tube 10, and the outer tube fixing long hole 11 is A long hole extending in the front-rear direction.

Please refer to FIG. 2 and FIG. 3, the jaw assembly 20 has a jaw puller 21 fixed in the outer tube 10, the jaw puller 21 is a long piece extending in the front-back direction, and the jaw puller The rear end of 21 passes backward through the rear end of the outer tube 10, and a long hole 211 for a pliers nozzle rod is formed at the rear end of the pliers nozzle rod 21, corresponding to the position of the outer tube fixing long hole 11, at the pliers nozzle rod 21 is provided with a jaw pull rod fixing hole 212, a jaw 22 is connected to the front end of the jaw pull rod 21, the front end of the jaw 22 passes through the front end of the outer tube 10, and a front end of the jaw 22 is formed The jaw portion 221 is formed with two jaw ribs 222 on the left and right sides of the bottom surface of the jaw portion 221, and a nail groove 23 is fixedly arranged on the top surface of the jaw lever 21, and the nail groove 23 is a long length extending in the front-rear direction Groove, a rail 231 extending in the front-rear direction is formed in the nail groove 23, and the front end of the rail 231 A stopper 232 is formed on the top of the front end of the rail 231 facing the rear end of the jaw part 221, and a plurality of nail pusher positioning holes are provided on the bottom surface of the nail groove 23 at equal intervals 233.

More than two nails 24 are successively arranged in the track 231 from front to back, and a nail pusher 25 is slidably arranged in the track 231, and a rear end at the bottom of the nail pusher 25 and a rear side at the top A positioning elastic piece 251 and a propelling elastic piece 252, the free end of the positioning elastic piece 251 snaps against one of the nail pusher positioning holes 233 of the plurality of nail pusher positioning holes 233, and the free end of the pushing elastic piece 252 faces upward and backward Protruding from the nail groove 23, a front side of the top of the nail pusher 25 protrudes upward to form a stopper 234, the width of the stopper 234 is narrower than the width of the stopper 232, so that the stopper 232 can block The stopper 234 prevents the nail pusher 25 from moving forward out of the track 231. The front end of the nail pusher 25 is used to push the rearmost nail 24.

The upper nail push rod 30 is an elongated piece extending in the front-rear direction. The upper nail push rod 30 is inserted into the outer tube 10 and abuts against the top surface of the nail groove 23. The upper nail push rod 30 The front half of the 30 is provided with a plurality of advancing holes 31 in an equally spaced arrangement, and the free end of the advancing shrapnel 252 of the nail pusher 25 is located in one of the advancing holes 31 of the plurality of advancing holes 31. The front end of the push rod 30 is provided with a nail pulling piece 32, the rear end of the upper nail push rod 30 penetrates rearwardly of the rear end of the outer tube 10, and a front and rear positions of the rear end portion of the upper nail push rod 30 are respectively provided with The rear long hole 33 of the upper push rod and the upper hole 34 of the upper push rod, the rear long hole 33 of the upper push rod is a long hole extending in the front-rear direction, and the rear long hole 33 of the upper push rod is longer than the tie rod The positions of the holes 211 are overlapped up and down, corresponding to the position of the outer tube fixing the long hole 11, a front long hole 35 of the upper nail push rod is perforated in the upper nail push rod 30, and the front long hole 35 of the upper nail push rod is located on the upper In front of the rear long hole 33 of the nail push rod, the aforementioned jaw lever fixing hole 212 is located below the front end portion of the front long hole 35 of the upper nail push rod.

The covering push rod assembly 40 is provided with a covering push rod 41 in the outer tube 10. The covering push rod 41 is an elongated piece extending in the front-rear direction and abuts against the bottom surface of the jaw puller 21 , The rear end of the covering push rod 41 penetrates the rear end of the outer tube 10 backwards, cooperates with the position of the rear long hole 33 of the nail push rod, a covering is inserted in the rear end of the covering push rod 41 The push rod hole 411 corresponds to the position where the outer tube fixes the long hole 11, and a penetration push rod long hole 412 is formed in the covering push rod 41, and the aforementioned jaw pull rod fixing hole 212 is located in the covering Above the front end of the push rod long hole 412, a hook piece portion 413 extends rearward at the rear end of the covering push rod 41, and a recess 414 is formed inwardly on the side of the hook piece portion 413. The front and rear positions of the upper nail pusher hole 34 are located within the range of the recess 414, and the rear end of the upper nail pusher 30 is offset toward the inner side of the recess 414, so that the upper nail pusher hole 34 is located in the recess Within the range of the inside of 414, a barb 415 is formed at the rear end of the hook piece portion 413 adjacent to the rear side of the notch 414, the height of the barb 415 is narrower than the depth of the front side of the notch 414, and the barb 415 The edge on the same side as the opening of the recess 414 is an inclined edge, and a spring hook hole 416 is formed in the barb 415.

A jaw clamp 42 is provided at the front end of the push rod 41, and the jaw clamp 42 is an elongated block extending in the front-rear direction. A jaw clamp 42 is formed on the top of the jaw clamp 42 In the clamping groove 421 opened at the front, the front end of the clamping groove 421 is sleeved on the rear ends of the two clamping ribs 222.

The connecting drive assembly 50 is provided with a sliding sleeve 51, which is a circular tube body extending in the front-rear direction and includes two half-shells A which are fastened up and down, matching the shape of the outer tube fixing slot 11 An insert block 511 is formed on opposite sides of the inner circumferential surface of the front end portion of the outer tube 10, and the insert block 511 is inserted into the outer tube fixing slot 11 for positioning, so that the front end of the sliding sleeve 51 is fitted and fixed on the outer tube 10 The rear end of the sliding tube 51 is connected to the rear end of the outer tube 10, and the sliding block 51 is provided with the insert block 511 through a fixed pin hole 512, and the fixed pin hole 512 passes through A fixed bolt 52 is disposed, the fixed bolt 52 passes through the front end portion of the front long hole 35 of the upper push rod and the front end portion of the covered push rod long hole 412, the middle of the fixed plug 52 is inserted in the jaw pull rod 21, the jaw pull rod fixing hole 212 fixes the jaw pull rod 21 in the outer tube 10.

Cooperating with the position of the long hole 33 of the upper push rod, the long hole 211 of the jaw pull rod, and the position of the covered push rod hole 411, a push pin long hole 513 is penetrated in the radial direction of the sliding sleeve 51, and the push pin is long The hole 513 is a long hole extending in the front-rear direction, and cooperates with the position of the upper push rod hole 34 and the notch 414, and a sliding pin long hole 514 is penetrated in the radial direction of the sliding sleeve 51, and the unhooking pin long hole 514 It is a long hole extending in the front-rear direction, and a slope 515 is formed at the front end of the unhook pin long hole 514.

A first sleeve 53 capable of moving forward and backward is sleeved at the position where the sliding pin 51 is provided with the push pin long hole 513, and a first positioning pin hole 531 is penetrated in the first sleeve 53 in the radial direction. A push pin 54 is inserted and fixed in the first positioning pin hole 531. The push pin 54 passes through the rear long hole 33 of the upper nail push rod and the long hole 211 of the jaw pull rod. The push pin 54 is inserted into the pusher The covering push rod hole 411 of the rod 41 can drive the covering push rod 41 forward through the push pin 54 when the first sleeve 53 advances.

Please refer to FIG. 2 to FIG. 5, a second sleeve 55 that can move forward and backward is sleeved on the position of the sliding sleeve 51 where the uncoupling pin long hole 514 is provided, on the first sleeve 53 and the second A driving spring 501 in a compressed state is disposed between the sleeves 55, and a second positioning pin hole 551 is penetrated in the radial direction of the second sleeve 55. The second positioning pin hole 551 is the extending direction and the sliding sleeve A long hole with the same direction in the tangent direction of 51, a decoupling pin 56 is inserted in the second positioning pin hole 551, and the decoupling pin 56 can extend along the extending direction of the second positioning pin hole 551 in the second positioning pin hole 551 Moving, the decoupling pin 56 passes through the decoupling pin long hole 514 and the notch 414, and the decoupling pin 56 is inserted into the upper nail pusher hole 34 at the rear end of the upper nail pusher 30.

As shown in FIG. 6, the decoupling pin 56 leans toward the inside of the recess 414, so that the barb 415 covering the rear end of the push rod 41 hooks the decoupling pin 56 to keep the driving spring 501 in a compressed state . When the push rod 41 is pushed forward by the first sleeve 53, since the uncoupling pin 56 is hooked by the barb 415, the upper push rod 30 combined with the uncoupling pin 56 will be provided with the The overhanging push rod 41 of the barb 415 advances together. When the decoupling pin 56 advances to the inclined surface 515, it will move along the inclined surface 515 and disengage from the barb 415, at which time the second sleeve 55 is restored to the shape The driving spring 501 is pushed backwards from the rear end position of the first sleeve 53 to produce uncoupling and being driven backward. The second sleeve 55 that moves backward relative to the first sleeve 53 is driven by the uncoupling pin 56 The upper nail push rod 30 moves backward, so that the upper nail push rod 30 moves back and forth once while the first sleeve 53 continues to advance. When the push rod 41 returns back to its original position, the first sleeve 53 compresses backward against the drive spring 501 in front of the second sleeve 55, and returns the barb 415 to catch the disengagement Undo 56 position.

A spring positioning pin hole 516 is penetrated at the rear end of the sliding sleeve 51, the spring positioning pin hole 516 is penetrated at the rear end of the two shell halves A, and a fixing is sleeved at the rear end of the two shell halves A A sleeve 57, a bolt hole 571 is penetrated in the fixing sleeve 57, a spring positioning pin 58 is inserted in the bolt hole 571, the spring positioning pin 58 is inserted in the spring positioning pin hole 516, after the push rod 41 is overlaid Between the spring hook hole 416 at the end and the spring positioning pin hole 516, a cover spring 59 is provided so that the push pin 54 abuts the rear end of the push pin long hole 513.

When the aforementioned first preferred embodiment of the present invention is used, the first sleeve and the second sleeve 55 are driven by a driving mechanism such as a grip unit of an existing automatic clip applier, but this preferred embodiment is driven The driving mechanism of the operation is not limited to the existing gripping unit, as long as it can drive the covering push rod 41 and the upper nail push rod 30 in a manner consistent with the operation mode of the preferred embodiment, it can drive the preferred embodiment. In the present invention, a compressed driving spring 501 is provided between the first sleeve 53 for controlling the push rod 41 and the second sleeve 55 for controlling the push rod 30 to cooperate with the push The barb 415 at the rear end of the push rod 41 can hook or automatically decouple the decoupling pin 56, so that the second sleeve 55 can be pushed back by the driving spring 501 and drive the upper nail to push during the advancement of the first sleeve 53 The retracted structure of the rod 30 can be applied not only to the vascular clip applicator of the first preferred embodiment described above, but also to other two types of joysticks with a push rod 30 and a push rod 41. Vascular clip applicator for clip operation.

Please refer to FIG. 9, the first preferred embodiment of the present invention is to install the part of the sliding sleeve 51 in the grip unit 60 of the automatic clip applier, so that the outer tube 10 passes forward through the grip In the unit 60, a trigger 61 is provided on the holding unit 60. The trigger 61 is pivotally connected to a connecting rod 62, and the top end of the connecting rod 62 is pivotally connected to a driving seat 63 embedded and combined with the first sleeve 53, when used When a person presses the trigger 61 backward, the driving base 63 and the first sleeve 53 are moved forward through the connecting rod 62.

Please refer to FIG. 6, when the first sleeve 53 is driven forward, the first sleeve 53 drives the advancement rod 41 forward by the push pin 54, and the advancement rod 41 advances During the movement, the uncoupling pin 56 and the second sleeve 55 caught by the barb 415 overlying the rear end of the push rod 41 will interact with The first sleeve 53 moves forward together, so that the upper nail pusher 30 and the covering pusher 41 advance together. When the uncoupling pin 56 advances to the inclined surface 515, it will move along the inclined surface 515 and automatically disengage from the Barb 415, at this time the driving spring 501 will return to shape, and while the covering push rod 41 continues to move forward, the second sleeve 55 is driven to move backward relative to the rear end of the first sleeve 53 so that the second The sleeve 55 drives the upper nail push rod 30 to move backward with the uncoupling pin 56. During the whole process of advancing the push rod 41, the upper nail pusher 30 automatically moves back and forth once. During the process, the actions of the second sleeve 55 and the upper nail pusher 30 are automatically performed. The external force of the grip unit 60 is driven.

When the upper push rod 30 moves forward and backward once, please refer to FIG. 7, the pushing hole 31 where the free end of the pushing shrapnel 252 is located will advance, and the rear end edge of the pushing hole 31 will bear against the pushing shrapnel At the free end of 252, the nail pusher 25 is pushed forward together, so that the nail pusher 25 pushes a nail 24 at the forefront from the rear to the mouth portion 221 of the clamp, and then the nail pusher 30 Move backward so that the free end of the pushing dome 252 of the nail pusher 25 that has moved forward is located in the previous pushing hole 31 of the pushing hole 31 that pushes the nail pusher 25 forward. During the advancement of the plunger 41, please refer to FIG. 8, when the frontmost pin 24 is sent into the jaw portion 221, the plunger 41 continues to push the jaw forward The clamping device 42 moves forward, and the clamping slot 221 clamps the clamping nail 24 so that the clamping groove 421 of the jaw clamping device 42 presses the two clamping ribs 222 against each other.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of the claimed rights of the present invention. Any other equivalent changes or modifications made without departing from the spirit of the present invention should be included in the present invention Within the scope of patent application.

10: Outer tube

22: jaws

50: Connect drive assembly

Claims (4)

A blood vessel clip applying device with automatic decoupling includes an outer tube, a sliding sleeve is connected to the rear end of the outer tube, and a push pin slot is penetrated in the radial direction on the front and rear sides of the sliding sleeve And a long hole of the decoupling pin, a slope is formed at the front end of the long hole of the decoupling pin; a nail assembly on the jaw is penetrated in the outer tube and is provided with a jaw at the front, forming a The jaw part forms a track behind the jaw part, and more than two nails are successively arranged in the track from front to back; an upper nail push rod, the upper nail push rod penetrates the outer tube Inside and at the front end, there is a nail pull piece, and the upper nail push rod can drive the most forward nail into the mouth of the clamp with the nail push piece, and a front and rear position at the rear end of the upper nail push rod A long hole behind the nail push rod and an upper nail push rod hole; an overlay push rod assembly, the overlay push rod assembly is penetrated in the outer tube and can drive the jaw portion of the jaw to be clamped, the overlay The push rod assembly is provided with a push rod, which is matched with the position of the long hole behind the upper push rod, and a push rod hole is drilled at the rear end of the push rod, after the push rod A recess is formed inwardly from the end side, and a barb is formed adjacent to the rear side of the notch. The edge of the barb on the same side as the opening of the notch is a slanted edge; and an engagement drive assembly is located in the A first sleeve and a second sleeve are sleeved at the front and back positions of the sliding sleeve respectively, and a drive spring in a compressed state is placed against the first sleeve and the second sleeve; The tube is combined with a push pin, the push pin passes through the long hole of the upper push rod and is inserted into the hole of the push rod; the second sleeve penetrates a second positioning pin hole, and the second positioning pin hole It is a long hole extending in the same direction as the tangent direction of the sliding sleeve. A decoupling pin is movably inserted in the second positioning pin hole, and the decoupling pin passes through the long hole of the decoupling pin and the notch and is inserted in the The push rod hole is nailed, and the decoupling pin is hooked by the barb. The automatic decoupling blood vessel clip applying device according to claim 1, wherein the rear end of the upper nail push rod is offset toward the inner side of the notch, so that the upper nail push rod hole is located in the range inside the notch Inside, let the decoupling pin fall to the inside of the notch. The automatic decoupling blood vessel clip applying device according to claim 1 or 2, wherein the height of the barb is narrower than the depth of the front side of the notch. A blood vessel clip applying device according to claim 3, wherein a spring positioning pin hole is inserted through the rear end of the sliding sleeve, and a spring positioning pin is inserted and fixed in the spring positioning pin hole. The hook is provided with a spring hook hole, and a hook spring is provided between the spring hook hole and the spring positioning pin, so that the push pin abuts against the rear end of the push pin long hole.

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