CN110279453B - Cutter-carrying stopper with self-locking function and puncture outfit - Google Patents
Cutter-carrying stopper with self-locking function and puncture outfit Download PDFInfo
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- CN110279453B CN110279453B CN201910521263.XA CN201910521263A CN110279453B CN 110279453 B CN110279453 B CN 110279453B CN 201910521263 A CN201910521263 A CN 201910521263A CN 110279453 B CN110279453 B CN 110279453B
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- 230000001681 protective effect Effects 0.000 claims abstract description 68
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 206010052428 Wound Diseases 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 210000003815 abdominal wall Anatomy 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 210000000683 abdominal cavity Anatomy 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000029663 wound healing Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a cutter-carrying stopper with a self-locking function, which comprises a cutter component, a self-locking mechanism, an unlocking mechanism, a supporting component and a handle, wherein the self-locking mechanism realizes the mutual conversion between the movement along the length direction of a cutter bar and the movement perpendicular to the length direction of the cutter bar through a spring and a direction conversion mechanism, thereby realizing the self-locking function of a protective sleeve. The invention also provides a puncture outfit with the knife with the self-locking function. The essence of the invention is that the fixing and the movement of the protective sleeve are realized through a mechanical mechanism, and after a trigger button is started, the restriction of the protective sleeve is released and the protective sleeve can move up and down; after the trigger button is restored to the original position, the protective sleeve is limited again and cannot move.
Description
Technical Field
The invention belongs to the field of minimally invasive surgical instruments, and particularly relates to a stopper with a puncture blade and a self-locking function and a puncture outfit.
Background
The disposable puncture outfit product is mainly applied to minimally invasive surgery and mainly comprises two large components, namely a sleeve component and an occluder component. Wherein the occluder assembly is further divided into a bladeless occluder and a bladed occluder. The knife-free stopper is generally injection molded from a plastic material, without a metal blade; the band knife occluder comprises a metal blade. The puncture outfit using the knife-less stopper is a knife-less puncture outfit, as shown in fig. 1 to 4 of chinese patent publication No. CN1689531a, and the puncture outfit using the knife-less stopper is a knife-less puncture outfit, as shown in fig. 2 of chinese patent publication No. CN 204768521U.
When in clinical use, the whole puncture outfit is inserted into the abdomen of a human body, the stopper component is pulled out after penetrating through abdominal tissues, and the sleeve component is reserved on the human body, so that the abdominal cavity of the human body is communicated with the outside through the sleeve. The surgeon may perform the surgical procedure on the patient through a passageway such as the cannula. Compared with open operation, the minimally invasive operation has the characteristics of small wound, no suture, quick wound recovery and the like. The puncture outfit with the knife has the advantages of being provided with the metal blade, being rapid in puncture process, small in wound, rapid in wound healing and the like.
The puncture outfit with the knife has a certain danger in use due to the metal blade, and has higher safety requirement. It is required that the blade cannot be exposed (the blade is protected) before use, but only by activating the trigger button. When penetrating the abdominal wall tissue of the human body during surgical penetration, the blade is required to be protected again immediately (preventing the blade from damaging the human body organs).
The total requirements for the puncture outfit with knife are as follows: before use, in order to prevent misoperation, the blade is required to be unable to be exposed; the blade is exposed when in use; the blade is protected again after penetrating the abdominal wall of the human body. The protection function is called the self-locking function of the puncture outfit with the knife. I.e. after the trigger button is started, the blade acts; after the trigger button returns, the blade is protected.
The knife-equipped puncture outfit in the prior art has no self-locking function, and the knife blade is triggered due to misoperation in the operation process, so that accidents are easy to cause.
Based on this, the present invention has been made.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a knife-carrying stopper with a self-locking function, which has a unique self-locking mechanism and can stably and reliably trigger and protect a knife blade. When the trigger button is not started, the blade of the blocking device with the blade is limited in the protective sleeve and cannot penetrate out of the protective sleeve, so that the protective effect is achieved; when the trigger button is started, the protective sleeve retracts after being subjected to resistance until the blade is gradually exposed, so that a puncture cutting effect can be achieved; when the resistance acting on the protective sleeve is gradually reduced, the protective sleeve can return to the original position, so that the blade is protected.
The essence of the invention is that the fixing and the movement of the protective sleeve are realized through a mechanical mechanism, and after a trigger button is started, the restriction of the protective sleeve is released and the protective sleeve can move up and down; after the trigger button is restored to the original position, the protective sleeve is limited again and cannot move.
The invention provides a cutter-carrying blocker with a self-locking function, which comprises a cutter component, a self-locking mechanism, an unlocking mechanism, a supporting component and a handle, wherein the cutter component comprises a cutter bar, a protective sleeve and a blade, the cutter bar is fixedly connected to the handle, the protective sleeve is connected to the self-locking mechanism, the unlocking mechanism and the handle are all arranged on the supporting component,
the self-locking mechanism realizes the mutual conversion between the movement along the length direction of the cutter bar and the movement perpendicular to the length direction of the cutter bar through the spring and the direction conversion mechanism, and when the resistance encountered on the protective sleeve (12) is smaller than the elastic force provided by the self-locking spring (24) on the premise that the button (31) of the unlocking mechanism (30) is already activated, the self-locking mechanism (20) fixes the protective sleeve (12) so that the blade (13) cannot be exposed out of the protective sleeve (12);
the unlocking mechanism is used for providing a pressing force along the length direction of the cutter bar, unlocking of the protective sleeve is achieved, and the cutter blade is exposed out of the protective sleeve.
Further, the self-locking mechanism comprises an elastic arm assembly, a sliding part, a rotating part, a self-locking spring and a second spring, wherein the elastic arm assembly, the sliding part and the rotating part form the direction conversion mechanism, and the elastic arm assembly is fixedly connected with one end of the protective sleeve;
the elastic arm component can form sliding surface contact with the sliding part and the rotating part in the length direction of the cutter bar through different parts;
the rotating piece is contacted with the elastic arm assembly through the rotating arm and contacted with the sliding piece through the shifting block, and the rotating arm and the shifting block form a vertical angle;
the second spring is sleeved on the sliding piece and provides pressure for the sliding piece;
the self-locking spring is arranged between the elastic arm assembly and the handle, and the elastic direction of the self-locking spring is parallel to the length direction of the cutter bar.
Further, the elastic arm assembly comprises an elastic arm base and an elastic arm, the elastic arm is made of elastic materials and is vertically arranged on the elastic arm base, a through hole for sleeving a protective sleeve is formed in the middle of the elastic arm base, and a first passive clamping surface matched with the sliding piece is arranged at the edge of the elastic arm base.
Further, the distal end of the elastic arm is provided with a projection having a first driving surface contacting the rotating arm of the rotating member and a second driving surface intersecting the first driving surface.
Further, the sliding piece comprises a D-shaped block, a square block, a guide post and two U-shaped forks which are arranged in parallel, wherein the arc-shaped end of the D-shaped block is arranged at the upper end of one face of the square block, the guide post and the two U-shaped forks are arranged on the other face of the square block, the two U-shaped forks are respectively arranged at the opposite ends of the lower end of the face of the square block, and the guide post is arranged in the middle of the face of the square block.
Further, a first active clamping surface is arranged below the square block and is used for being in sliding fit with a first passive clamping surface of the elastic arm base.
Further, a third driven surface for matching with the unlocking mechanism is arranged on both short arms of the D-shaped block, and an angle formed by the third driven surface and the upper surface of the D-shaped block is larger than 45 degrees and smaller than 90 degrees.
Further, a limit bump is arranged at the lower part of the U-shaped fork.
Further, the rotating piece comprises a rotating shaft, a shifting block and a rotating arm, wherein the shifting block and the rotating arm are fixedly connected with the rotating shaft, and a certain angle is formed between the shifting block and the rotating arm in the circumferential direction along the rotating shaft. Preferably a vertical angle.
Further, the end of the rotating arm far away from the rotating shaft is provided with a first driven surface and a second driven surface which are respectively matched with the first driving surface and the second driving surface in the elastic arm assembly.
Further, the unlocking mechanism comprises a button and a return spring, a third driving surface and a second passive clamping surface which is intersected with the third driving surface are arranged on the button, the third driving surface is used for being in sliding fit with the third driven surface on the sliding piece, and the second passive clamping surface is used for being in sliding fit with the second active clamping surface on the sliding piece; the cylinder at the lower part of the button is used for accommodating the return spring.
Further, the supporting component comprises a base, a sliding piece supporting table, a rotating piece supporting table, a second spring baffle and a return spring guide post, wherein a through hole is formed in the center of the base and used for the passing of the cutter component, the elastic arm component and the self-locking spring; the sliding piece supporting table, the rotating piece supporting table, the second spring baffle plate and the return spring guide post are all arranged on the base.
Further, the handle comprises a buckle and screw hole columns, the two buckles are respectively used for installing the handle in the two slotted holes of the supporting component, and the screw hole columns are used for being in threaded connection with the tail end of the cutter bar.
The invention also provides a knife puncture outfit with a self-locking function, which comprises the knife stopper with the self-locking function.
The invention has the advantages that: 1. the mutual conversion between the motion along the length direction of the cutter bar and the motion perpendicular to the length direction of the cutter bar is realized through the spring and the direction conversion mechanism, so that the self-locking function of the protective sleeve is realized; 2. after the button is excited, when the resistance on the protective sleeve is smaller than the elastic force provided by the spring, the self-locking mechanism fixes the protective sleeve, so that the blade is not exposed out of the protective sleeve any more; 3. through setting up elastic arm subassembly, slider and rotor for can lock each other between these three parts, thereby ensure that the protective sheath can in time cover the blade.
Drawings
FIG. 1 is a schematic view of an embodiment of a knife obturator with self-locking function according to the present invention, wherein (a) is the state when the trigger button is not pressed, and the blade is not exposed; (b) To trigger the state when the button is pressed, the blade is exposed.
Fig. 2 is an enlarged schematic view of fig. 1.
Fig. 3 is a schematic exploded view of one embodiment of the knife obturator with self-locking function of the present invention.
Fig. 4 is an enlarged schematic view of a partial structure of one embodiment of the knife obturator with self-locking function of the present invention with the handle removed.
Fig. 5 is a schematic structural view of a self-locking mechanism of one embodiment of the knife obturator with self-locking function of the present invention.
FIG. 6 is a schematic view of the spring arm assembly of the self-locking mechanism of FIG. 5.
Fig. 7 is a schematic view of a slider structure of the self-locking mechanism of fig. 5.
Fig. 8 is a schematic view of the rotating member of the self-locking mechanism of fig. 5.
Fig. 9 is a schematic structural view of an unlocking mechanism of one embodiment of the knife blocking device with self-locking function of the present invention.
Fig. 10 is a schematic structural view of a support assembly of one embodiment of the knife obturator with self-locking function of the present invention.
Fig. 11 is a schematic view of the handle of one embodiment of the knife obturator with self-locking function of the present invention.
Wherein 10-knife assembly, 11-knife bar, 12-protective sleeve, 121-knife slit, 122-first part, 123-second part, 13-knife blade, 20-self-locking mechanism, 21-elastic arm assembly, 211-elastic arm base, 2111-first passive detent surface, 212-elastic arm, 213-protrusion, 2131-first driving surface, 2132-second driving surface, 22-slider, 221-D-shaped block, 2211-short arm, 2212-third driven surface, 2213-second active detent surface, 222-square block, 2221-first active detent surface, 223-guide post, 224-U-shaped fork, 2241-limit bump, 23-rotating member, 231-rotating shaft, 232-shifting block, 233-rotating arm, 2331-first driven surface, 2332-second driven surface, 24-self-locking spring, 25-second spring, 30-unlocking mechanism, 31-button, 311-third driving surface, 312-second passive clamping surface, 313-cylinder, 32-return spring, 40-support assembly, 41-base, 42-sliding member support table, 43-rotating member support table, 44-second spring baffle, 45-return spring guide post, 46-slotted hole, 47-positioning post, 50-handle, 51-buckle, 52-screw post, 60-stopper cap.
Detailed Description
The invention will be further described with reference to fig. 1-11.
As shown in fig. 1 to 4, the cutter-carrying stopper with self-locking function of the present invention comprises a cutter assembly 10, a self-locking mechanism 20, an unlocking mechanism 30, a supporting assembly 40 and a handle 50, wherein the cutter assembly 10 comprises a cutter bar 11, a protective sleeve 12 and a blade 13, the cutter bar 11 is fixedly connected to the handle 50, the protective sleeve 12 is connected to the self-locking mechanism 20, and the self-locking mechanism 20, the unlocking mechanism 30 and the handle 50 are all arranged on the supporting assembly 40.
The self-locking mechanism 20 realizes the mutual conversion between the movement along the length direction of the cutter bar 11 and the movement perpendicular to the length direction of the cutter bar through springs (24, 25) and a direction conversion mechanism, thereby realizing the self-locking function of the protective sleeve 12; when the resistance on the protective sheath 12 is less than the spring force provided by the spring 24, the self-locking mechanism 20 secures the protective sheath 12 such that the blade 13 is no longer exposed outside the protective sheath 12.
The unlocking mechanism 30 is used for providing a pressing force along the length direction of the cutter bar 11 to unlock the protective sleeve 12, so that the blade 13 is exposed out of the protective sleeve 12.
The top end of the cutter bar 11 is provided with a blade 13, the cutter bar 11 and the blade 13 are both arranged inside the protective sleeve 12, one end of the protective sleeve 12 is conical, and the conical end is provided with a cutter slot 121 for penetrating out of the blade 13.
In a preferred embodiment, the protective sleeve 12 is modular and includes a first portion 122 and a second portion 123, the first portion 122 being threadably connected or snapped into place with the second portion 123.
The end of the first portion 122 is provided with a knife slit 121; the end of the second portion 123 is connected to the self-locking mechanism 20.
As shown in fig. 5 to 8, the self-locking mechanism 20 includes a resilient arm assembly 21, a slider 22, a rotator 23, a self-locking spring 24, and a second spring 25, wherein the resilient arm assembly 21, the slider 22, and the rotator 23 constitute a direction switching mechanism.
The elastic arm assembly 21 is fixedly connected with one end of the protective sleeve 12, and the elastic arm assembly and the protective sleeve move in the same direction along the length direction of the cutter bar 11 under the action of the self-locking spring 24. The spring arm assembly 21 may be integrally manufactured with the protective sleeve 12.
The elastic arm assembly 21 can form sliding surface contact with the slider 22 and the rotator 23 in the length direction of the cutter bar by different portions (i.e., the first passive clamping surface 2111, the first driving surface 2131, and the second driving surface 2132 in fig. 6).
The rotating member 23 contacts the elastic arm assembly 21 through the rotating arm 233 (i.e., contacts the first driving surface 2131 and the second driving surface 2132 of fig. 8 through the first driven surface 2331 and the second driven surface 2332 of fig. 6, respectively), and contacts the sliding member 22 through the shifting block 232 (i.e., contacts the shifting block 232 of fig. 8 and the U-shaped fork 224 of fig. 7), and the rotating arm 233 is at a substantially vertical angle, preferably at a vertical angle, to the shifting block 232.
The second spring 25 is sleeved on the sliding member 22 to provide pressure for the sliding member 22.
The self-locking spring 24 is disposed between the elastic arm assembly 21 and the handle 50, and the elastic direction of the self-locking spring 24 is parallel to the length direction of the cutter bar, so that the protective sleeve 12 can be pushed by the elastic force of the self-locking spring 24 to move along the length direction of the cutter bar.
As shown in fig. 6, the elastic arm assembly 21 includes an elastic arm base 211 and an elastic arm 212, the elastic arm base 211 has a cross structure with a through hole, the two elastic arms 212 are respectively disposed on two opposite sides of the elastic arm base 211, the elastic arm base 211 is provided with a through hole and a self-locking spring mounting limiting surface, the through hole is in a truncated circular shape, and is of foolproof design, so that the elastic arm base 211 is conveniently and unrotatably mounted on the end of the protective sleeve 12, and the working surfaces of the two elastic arms 212 face the rotating member 23 exactly. The elastic arm 212 is made of an elastic material and can be elastically deformed by a small amount in a direction perpendicular to the length direction of the cutter bar, thereby allowing the rotating arm 233 of the rotating member 23 to slide to a position where the elastic arm assembly 21 is locked. The elastic arm 212 is vertically disposed on the elastic arm base 211, and a first passive clamping surface 2111 matched with the sliding piece 22 is disposed at the edge of the elastic arm base 211, and the first passive clamping surface 2111 is matched with a first active clamping surface 2221 on the sliding piece 22 for locking the elastic arm assembly 21, and is also used for locking the protective sleeve 12.
The distal end of the elastic arm 212 is provided with a protrusion 213, and the protrusion 213 is provided with a first driving surface 2131 contacting the rotating arm 233 of the rotating member 23 and a second driving surface 2132 intersecting the first driving surface 2131, and the first driving surface 2131 is generally provided with an inclined curved surface, which is advantageous for reducing friction between curved surfaces, and the second driving surface 2132 is generally provided with an inclined flat surface, which is advantageous for increasing friction corresponding to the inclined surface.
As shown in fig. 7, the slider 22 includes a D-shaped block 221, a square block 222, a guide post 223 and two parallel U-shaped prongs 224, wherein the arc-shaped end of the D-shaped block 221 is disposed at the upper end of one face of the square block 222, the guide post 223 and the two U-shaped prongs 224 are disposed on the other face of the square block 222, and the two U-shaped prongs 224 are disposed at opposite ends of the lower end of the face of the square block 222, respectively, and the guide post 223 is disposed in the middle of the face of the square block 222, which is advantageous for the balanced pushing of the slider 22 by the second spring 25.
The square block 222 has 6 faces, including a left plane, a right plane, a top plane, a bottom plane, a front plane, a back plane, a front plane, a rear plane, wherein the upper end of one plane is fixedly connected with the arc end of the D-shaped block 221, the middle part of the other opposite plane is fixedly provided with a guide post 223, and the lower end of the face is provided with two U-shaped forks 224 in front-back parallel. A first active clamping surface 2221 is provided under the square block 222 for sliding engagement with the first passive clamping surface 2111 of the resilient arm base 211. When the two are overlapped, the locking of the elastic arm assembly 21 can be realized; when the elastic arm assembly 21 and the elastic arm assembly are separated, unlocking of the elastic arm assembly can be achieved.
The short arm 2211 of the D-shaped block 221 is provided with a third driven surface 2212 for cooperating with the unlocking mechanism 30, and an angle formed by the third driven surface 2212 and the upper surface of the D-shaped block 221 is larger than 45 degrees and smaller than 90 degrees, preferably 50-75 degrees.
The lower part of the U-shaped fork 224 is provided with a limit bump 2241. The main function of the limiting bump 2241 is to limit the contact area between the first active clamping surface 2221 and the first passive clamping surface 2111, so as to avoid the situation that the pair of clamping surfaces (2221,2111) cannot be separated in operation.
As shown in fig. 8, the rotating member 23 includes a rotation shaft 231, a dial 232 and a rotating arm 233, both of which are fixedly coupled to the rotation shaft 231, and the dial 232 and the rotating arm 233 are at an angle to each other in a circumferential direction of the rotation shaft 231. Preferably a vertical angle.
The end of the swivel arm 233 remote from the swivel shaft 231 has a first driven surface 2331 and a second driven surface 2332 that mate with the first driving surface 2131 and the second driving surface 2132, respectively, in the resilient arm assembly 21.
As shown in fig. 9, the unlocking mechanism 30 includes a button 31 and a return spring 32, wherein the button 31 is provided with a third driving surface 311 and a second passive clamping surface 312 intersecting with the third driving surface 311, wherein the third driving surface 311 is used for sliding fit with a third driven surface 2212 on the slider 22, and the second passive clamping surface 312 is used for sliding fit with a second active clamping surface 2213 of the slider 22; a cylinder 313 at the lower part of the button 31 is used to accommodate the return spring 32. Pressing the button 31 will drive the slider 22 in the self-locking mechanism 20 to move, thereby causing the first active clamping surface 2221 to separate from the first passive clamping surface 2111, so that the protective sleeve 12 is unlocked and can move along the length direction of the cutter bar, thereby exposing the blade 13 hidden therein.
As shown in fig. 10, the supporting assembly 40 includes a base 41, a sliding member supporting table 42, a rotating member supporting table 43, a second spring baffle 44 and a return spring guide post 45, wherein a through hole is formed in the center of the base 41 for the passage of the cutter assembly 10, the elastic arm assembly 21 and the self-locking spring 24, the sliding member supporting table 42 is used for supporting the sliding member 22, a parallel semicircular groove 431 is formed in the rotating member supporting table 43 for supporting the rotating shaft 231 of the rotating member 23, the second spring baffle 44 is used for blocking the second spring 25, and the return spring guide post 45 is used for positioning and guiding the return spring 32; the slider support table 42, the rotor support table 43, the second spring shutter 44, and the return spring guide post 45 are all provided on the base 41. The base 41 is also provided with a slot 46 for mounting the handle 50 and a locating post 47 for mounting the stopper cap 60.
As shown in fig. 11, the handle 50 includes a snap 51 and screw posts 52, the two snap 51 being used to mount the handle 50 in the two slots 46 of the support assembly 40, respectively, and the screw posts 52 being used to threadedly engage the ends of the knife bar 11.
The invention also provides a knife puncture outfit with a self-locking function, which comprises the sleeve and the knife stopper with the self-locking function.
It should be noted that, in the present invention, the driving surface and the driven surface are corresponding, the driving surface is generally active, and the driven surface is generally passive; the active clamping surface and the passive clamping surface are corresponding, the active clamping surface is the surface for actively realizing clamping and positioning, and the passive clamping surface is the surface for passively realizing clamping and positioning.
The implementation principle of the knife-equipped stopper and the puncture outfit with the self-locking function is as follows: in the initial state, the button 31 is not pressed, the first active clamping surface 2221 at the bottom end of the slider 22 blocks the first passive clamping surface 2111 on the elastic arm base 211, and the movement of the protective sleeve 12 is blocked, so that the blade 13 is protected inside the protective sleeve 12 and is not exposed. When the button 31 is pressed, the third driving surface 311 on the button 31 presses the third driven surface 2212 on the slider 22, causing the slider 22 to move. When the button 31 is pressed to the bottommost position, the movement amount of the slider 22 reaches the maximum, and at the same time, the third driving surface 311 on the button 31 no longer drives the third driven surface 2212 on the slider 22, and the slider 22 moves reversely under the action of the second spring 25 until the limited surface (the second passive stop surface 312) of the button 31 is pressed. So that the button 31 remains at the bottommost position (rather than being returned to its original position by the return spring 32). At the same time, the locking of the first passive clamping surface 2111 on the elastic arm base 211 is released, that is, after the sliding member 22 moves, the first active clamping surface 2221 at the bottom end of the sliding member no longer limits the movement of the protective sleeve 12, and the protective sleeve 12 is unlocked.
Before clinical use, the button 31 is pressed down, at this time, the protective sleeve 12 is unlocked, the puncture outfit can penetrate into human tissues of a patient in the operation process, the protective sleeve 12 can move to the puncture reverse direction due to resistance, and the blade 13 can be gradually exposed in the movement process of the protective sleeve 12, so that the human tissues can be cut more conveniently, and the puncture is facilitated. Meanwhile, in the process of moving the protective cover 12, the first driving surface 2131 of the elastic arm assembly 21 mounted on the protective cover 12 is in sliding contact with the first driven surface 2331 of the rotating member 23 until the protrusion 213 of the elastic arm assembly 21 moves to break through the second driven surface 2332 of the rotating member 23 (at this time, the second driven surface 2332 is attached to the second driving surface 2132 of the protrusion 213), as the puncture outfit gradually penetrates into human tissue, the resistance acting on the protective cover 12 gradually decreases, when the resistance is smaller than the elastic force of the self-locking spring 24 acting on the protective cover 12, the protective cover 12 moves forward under the action of the self-locking spring 24, and the second driving surface 2132 of the elastic arm assembly 21 drives the second driven surface 2332 of the rotating member 23, so as to further drive the rotating member 23 to rotate along the rotating shaft 231, and the shifting block 232 on the rotating member 23 shifts the U-shaped fork 224 on the sliding member 22, so as to drive the sliding member 22 to move; when the second driving surface 2132 on the elastic arm assembly 21 rotates the rotating member 23 to the maximum rotation angle, the shifting block 232 also shifts the sliding member 22 to the maximum displacement, at this time, the sliding member 22 will unlock the limited surface (the second passive clamping surface 312) of the button 31, the button 31 will restore to the initial position under the action of the elastic force of the return spring 32, meanwhile, the protecting sleeve 12 will also restore to the initial position under the action of the self-locking spring 24, and the first active clamping surface 2221 at the bottom end of the sliding member 22 blocks the first passive clamping surface 2111 on the elastic arm base 211, thus preventing the recovering movement of the protecting sleeve 12, the protecting sleeve 12 is locked again, and the blade 13 cannot be exposed, thus playing a role of self-locking.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention in further detail, and are not to be construed as limiting the scope of the invention, but are merely intended to cover any modifications, equivalents, improvements, etc. based on the teachings of the invention.
Claims (6)
1. The utility model provides a take sword stopper with self-locking function, includes cutter package spare (10), self-locking mechanism (20), release mechanism (30), supporting component (40) and handle (50), cutter package spare (10) are including cutter arbor (11), protective sheath (12) and blade (13), cutter arbor (11) fixed connection on handle (50), protective sheath (12) are connected on self-locking mechanism (20), release mechanism (30) and handle (50) all set up on supporting component (40), its characterized in that:
the self-locking mechanism (20) realizes the mutual conversion between the movement along the length direction of the cutter bar and the movement perpendicular to the length direction of the cutter bar through the spring and the direction conversion mechanism, and when the resistance encountered on the protective sleeve (12) is smaller than the elastic force provided by the self-locking spring (24) on the premise that the button (31) of the unlocking mechanism (30) is activated, the self-locking mechanism (20) fixes the protective sleeve (12) so that the blade (13) cannot be exposed out of the protective sleeve (12);
the unlocking mechanism (30) is used for providing a pressing force along the length direction of the cutter bar to unlock the protective sleeve (12) so that the blade (13) is exposed out of the protective sleeve (12);
the self-locking mechanism (20) comprises an elastic arm assembly (21), a sliding part (22), a rotating part (23), a self-locking spring (24) and a second spring (25), wherein the elastic arm assembly (21), the sliding part (22) and the rotating part (23) form the direction conversion mechanism,
the elastic arm component (21) is fixedly connected with one end of the protective sleeve (22);
the elastic arm assembly (21) can form sliding surface contact with the sliding part (22) and the rotating part (23) in the length direction of the cutter bar through different parts;
the rotating piece (23) is contacted with the elastic arm assembly (21) through the rotating arm (233) and contacted with the sliding piece (22) through the shifting block (232), and the rotating arm (233) and the shifting block (232) form a substantially vertical angle;
the second spring (25) is sleeved on the sliding piece (22) and provides pressure for the sliding piece (22);
the self-locking spring (24) is arranged between the elastic arm assembly (21) and the handle (50), and the elastic direction of the self-locking spring (24) is parallel to the length direction of the cutter bar;
the elastic arm assembly (21) comprises an elastic arm base (211) and an elastic arm (212), the elastic arm (212) is made of elastic materials and is vertically arranged on the elastic arm base (211), a through hole for sleeving a protective sleeve (12) is formed in the middle of the elastic arm base (211), and a first passive clamping surface (2111) matched with the sliding piece (22) is formed in the edge of the elastic arm base (211);
the sliding piece (22) comprises a D-shaped block (221), a square block (222), a guide column (223) and two U-shaped forks (224) which are arranged in parallel, wherein the arc-shaped end of the D-shaped block (221) is arranged at the upper end of one face of the square block (222), the guide column (223) and the two U-shaped forks (224) are arranged on the other face of the square block (222), the two U-shaped forks (224) are respectively arranged at two opposite ends of the lower end of the face of the square block (222), and the guide column (223) is arranged in the middle of the face of the square block (222).
2. The knife blocker with self-locking function according to claim 1, characterized in that the rotating member (23) comprises a rotating shaft (231), a shifting block (232) and a rotating arm (233), both the shifting block (232) and the rotating arm (233) being fixedly connected with the rotating shaft (231), the shifting block (232) and the rotating arm (233) being at an angle to each other, preferably at a vertical angle, in the circumferential direction along the rotating shaft (231).
3. The self-locking knife blocker according to claim 1, characterized in that the unlocking mechanism (30) comprises a button (31) and a return spring (32), the button (31) is provided with a third driving surface (311) and a second active clamping surface (312) intersecting with the third driving surface, wherein the third driving surface (311) is used for sliding fit with a third driven surface (2212) on the slider (22), and the second active clamping surface (312) is used for sliding fit with a second passive clamping surface (2213) of the slider (22); a cylinder (313) at the lower part of the button (31) is used for accommodating a return spring (32).
4. The self-locking knife blocker, as claimed in claim 1, wherein the support assembly (40) comprises a base (41), a slider support (42), a rotor support (43), a second spring baffle (44) and a return spring guide post (45), wherein a through hole is formed in the center of the base (41) for the passage of the knife assembly (10), the elastic arm assembly (21) and the self-locking spring (24), the slider support (42) is used for supporting the slider (22), parallel semicircular grooves (431) are formed in the rotor support (43) for supporting the rotating shaft (231) of the rotor (23), the second spring baffle (44) is used for blocking the second spring (25), and the return spring guide post (45) is used for positioning and guiding the return spring (32); the sliding piece supporting table (42), the rotating piece supporting table (43), the second spring baffle plate (44) and the return spring guide post (45) are all arranged on the base (41).
5. The self-locking knife stopper according to claim 1, wherein the handle (50) comprises a clasp (51) and a screw post (52), the clasp (51) being respectively adapted to mount the handle (50) in two slots (46) of the support assembly (40), the screw post (52) being adapted to be screwed with the end of the knife bar (11).
6. A knife-equipped puncture outfit with self-locking function, which is characterized by comprising a sleeve and the knife-equipped stopper with self-locking function as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910521263.XA CN110279453B (en) | 2019-06-17 | 2019-06-17 | Cutter-carrying stopper with self-locking function and puncture outfit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910521263.XA CN110279453B (en) | 2019-06-17 | 2019-06-17 | Cutter-carrying stopper with self-locking function and puncture outfit |
Publications (2)
| Publication Number | Publication Date |
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| CN110279453A CN110279453A (en) | 2019-09-27 |
| CN110279453B true CN110279453B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910521263.XA Active CN110279453B (en) | 2019-06-17 | 2019-06-17 | Cutter-carrying stopper with self-locking function and puncture outfit |
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| CN (1) | CN110279453B (en) |
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| CN109223127A (en) * | 2018-09-07 | 2019-01-18 | 天津优外医疗器材制造有限公司 | A kind of lock ring structure, sheath assembly and the puncture outfit of singlehanded unlock |
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| US5538509A (en) * | 1994-01-31 | 1996-07-23 | Richard-Allan Medical Industries, Inc. | Trocar assembly |
| CN101366633A (en) * | 2001-01-19 | 2009-02-18 | 松下电器产业株式会社 | Lancet-integrated sensor, measuring device for lancet-integrated sensor, and cartridge |
| KR101243381B1 (en) * | 2011-09-30 | 2013-03-13 | 주식회사 세종메디칼 | Trocar assembly |
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| Publication number | Publication date |
|---|---|
| CN110279453A (en) | 2019-09-27 |
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