CN107898491B - Safety puncture core - Google Patents
Safety puncture core Download PDFInfo
- Publication number
- CN107898491B CN107898491B CN201711329320.1A CN201711329320A CN107898491B CN 107898491 B CN107898491 B CN 107898491B CN 201711329320 A CN201711329320 A CN 201711329320A CN 107898491 B CN107898491 B CN 107898491B
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- China
- Prior art keywords
- puncture
- sleeve
- locking
- outer sleeve
- push rod
- Prior art date
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Links
- 230000007246 mechanism Effects 0.000 claims abstract description 57
- 229920001971 elastomer Polymers 0.000 claims description 31
- 239000000806 elastomer Substances 0.000 claims description 31
- 238000003825 pressing Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 210000000683 abdominal cavity Anatomy 0.000 description 7
- 210000003815 abdominal wall Anatomy 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000002357 laparoscopic surgery Methods 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000002674 endoscopic surgery Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 206010022653 Intestinal haemorrhages Diseases 0.000 description 1
- 208000005646 Pneumoperitoneum Diseases 0.000 description 1
- 206010053649 Vascular rupture Diseases 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000012084 abdominal surgery Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 206010022694 intestinal perforation Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
Classifications
-
- 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
-
- 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
- A61B17/3496—Protecting sleeves or inner probes; Retractable tips
Abstract
The invention relates to a puncture core, in particular to a safe puncture core, and belongs to the technical field of medical appliances. According to the technical scheme provided by the invention, the safe puncture core comprises a puncture body and an outer sleeve sleeved on the head of the puncture body, wherein a puncture tip for puncture is arranged at the head end of the puncture body, the outer sleeve can move along the length direction of the puncture body at the head of the puncture body, and the puncture tip can be exposed from the head end of the outer sleeve when the outer sleeve and the puncture body move relatively; the puncture needle also comprises a cannula motion driving mechanism for pushing the cannula to move when the puncture tip penetrates through the puncture area and a cannula locking mechanism for locking the position between the cannula and the puncture body; the puncture needle has a compact structure, can meet the puncture requirement, can realize protection after puncture, and is convenient to use and operate, safe and reliable.
Description
Technical Field
The invention relates to a puncture core, in particular to a safe puncture core, and belongs to the technical field of medical appliances.
Background
Puncture outfits are indispensable surgical instruments in laparoscopy, abdominal surgery, and other minimally invasive or surgical procedures. The penetrator may create an access passageway in the abdominal wall of a person for laparoscopic or other surgical instruments (e.g., endoscopes, scissors, staplers, guidewires, catheters, filters, stents, etc.) to access the abdominal cavity and provide access for gases to and from the abdominal cavity to control the pneumoperitoneum required for an operation for examination or a surgical procedure. When minimally invasive laparoscopic surgery begins, a doctor usually makes a small incision in the abdomen of a patient, then aligns the vertex of the puncture end with the made small incision to puncture the abdominal wall with force, and carbon dioxide gas is filled into the abdominal cavity to manufacture a laparoscopic surgery cavity.
In the puncture core assembly in the prior art, the separating structure of the puncture end is generally a sheet structure, both sides are sharp, and the puncture device is reciprocally rotated during puncture and is simultaneously moved downwards while being reciprocally rotated left and right. When the abdominal wall is punctured, the operator can hardly stop due to the inertia force, the operator can not puncture the abdominal cavity too deeply due to the careless action, and the sharp puncture head can cause intestinal canal rupture and even vascular rupture, so that complications such as intestinal perforation, bleeding and the like are caused, and even life is endangered. Such events occur in the clinic of various endoscopic surgeries, which brings disadvantages to the popularization of endoscopic surgeries and threatens the safety of patients.
Clinically, a laparoscope puncture outfit is needed, when the puncture outfit pierces the abdominal wall, the sharp puncture head immediately retracts into the outer sleeve, so that damage to organs, viscera or blood vessels in the abdominal cavity is avoided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a safe puncture core which is compact in structure, can meet the puncture requirement, can realize protection after puncture, is convenient to use and operate, and is safe and reliable.
According to the technical scheme provided by the invention, the safe puncture core comprises a puncture body and an outer sleeve sleeved on the head of the puncture body, wherein a puncture tip for puncture is arranged at the head end of the puncture body, the outer sleeve can move along the length direction of the puncture body at the head of the puncture body, and the puncture tip can be exposed from the head end of the outer sleeve when the outer sleeve and the puncture body move relatively;
the puncture needle also comprises a cannula motion driving mechanism for pushing the cannula to move when the puncture tip penetrates through the puncture area and a cannula locking mechanism for locking the position between the cannula and the puncture body;
pressing the tail of the puncture body to enable the outer sleeve to move relative to the puncture body and enable the puncture tip to be exposed from the head end of the outer sleeve so as to perform required puncture by using the puncture tip; when the puncture tip penetrates through the region to be punctured, the sleeve motion driving mechanism drives the outer sleeve to move relative to the puncture body, so that the puncture tip is positioned in the outer sleeve, and when the puncture tip enters the outer sleeve, the outer sleeve and the puncture body are locked and kept in the current position state through the sleeve locking mechanism.
The sleeve motion driving mechanism comprises a sleeve elastic body sleeved on the puncture body, one end of the sleeve elastic body is connected with an elastic body connecting step on the puncture body, and the other end of the sleeve elastic body is connected with an inner resistance connecting body in the outer sleeve; when the puncture tip is exposed from the head end of the outer sleeve, the sleeve elastomer is in a compressed state; when the puncture tip penetrates through the region to be punctured, the sleeve elastomer can push the outer sleeve to move so that the puncture tip is positioned in the outer sleeve.
The sleeve locking mechanism comprises a spring pin body arranged at the head part of the puncture body, a spring pin mounting hole allowing the spring pin body to be embedded is arranged at the head end of the puncture body, the spring pin mounting hole penetrates through the puncture body, and the length direction of the spring pin mounting hole is perpendicular to the length direction of the puncture body;
the outer sleeve is provided with a sleeve positioning hole, the elastic pin body can move in the elastic pin mounting hole, the head end of the elastic pin body can extend into the sleeve positioning hole, and when the head end of the elastic pin body extends into the sleeve positioning hole, the outer sleeve and the puncture body can be locked with each other.
The elastic pin body comprises a locking pipe and a locking head arranged outside the head end of the locking pipe, the locking pipe is arranged in the elastic pin mounting hole, and the locking head can extend into the sleeve positioning hole;
the locking head pushing mechanism is used for pushing the locking head to move towards the sleeve positioning hole of the outer sleeve all the time, and when the locking head is aligned with the sleeve positioning hole of the outer sleeve, the locking head pushing mechanism can push the locking head to extend into the sleeve positioning hole.
The locking head pushing mechanism comprises a locking pipe elastomer arranged in the locking pipe and a locking bolt with one end extending into the locking pipe, and one end of the locking bolt can be in contact with the locking pipe elastomer.
The external diameter of locking head is less than the external diameter of locking pipe, and locking head and locking pipe are coaxial distribution, and the locking bolt includes the bolt pole and is located the bolt pole piece of bolt pole tip, the bolt pole piece is located outside the locking pipe, and the bolt pole stretches into the locking pipe and can make locking pipe elastomer in compression state.
The device also comprises a locking release mechanism which is matched with the elastic pin body, so that the head end of the elastic pin body extending into the sleeve positioning hole can withdraw from the sleeve positioning hole, and the outer sleeve can move relative to the puncture body at the head of the puncture body after the head end of the elastic pin body withdraws from the sleeve positioning hole.
The locking release mechanism comprises a push rod which is used for pushing the bullet pin body to move so that the head end of the bullet pin body exits from the sleeve positioning hole, one end of the push rod stretches into the puncture body, the push rod can move along the length direction of the puncture body in the puncture body, and the end part of the push rod stretching into the puncture body can be connected with the bullet pin body in an adapting way.
The push rod is coaxially distributed in the puncture body, the end part of the push rod, which extends into the puncture body, is provided with a pushing contact inclined plane, the elastic pin body is provided with a pushing connecting block which is matched with the pushing contact inclined plane, and when the push rod is pushed towards the direction close to the puncture tip after the pushing contact inclined plane of the push rod contacts with the pushing connecting block, the head end of the elastic pin body can be led to exit from the sleeve positioning hole.
Still include push rod motion canceling release mechanical system, push rod motion canceling release mechanical system is including the push rod elastomer of cover on locating the push rod and set up the elastomer connecting block on the push rod, and push rod elastomer is located the puncture internal, and the one end of push rod elastomer is connected with the internal push rod elastomer step of puncture, when the push rod moves to being close to puncture tip direction, and push rod elastomer is in compression state.
The invention has the advantages that: when the puncture tip penetrates through the region to be punctured, the sleeve motion driving mechanism drives the outer sleeve to move relative to the puncture body, so that the puncture tip is positioned in the outer sleeve, and when the puncture tip enters the outer sleeve, the outer sleeve and the puncture body are locked and kept in the current position state through the sleeve locking mechanism; after the outer sleeve and the puncture body are locked in position through the sleeve locking mechanism, the outer sleeve and the puncture body can not move relatively any more when the puncture handle is used for pressing the puncture body, namely, the puncture tip can be always positioned in the outer sleeve, and the purpose of stable and effective protection is achieved. When the secondary puncture is needed, the contact of the movable state can be realized by the locking release mechanism, the requirement of multiple punctures is met, and the device is convenient to use, safe and reliable.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of an outer sleeve according to the present invention.
Fig. 3 is a schematic view of a piercing tip of the present invention.
Fig. 4 is a schematic structural view of the latch body of the present invention.
FIG. 5 is a schematic view of the structure of the puncture body according to the present invention.
Fig. 6 is a schematic structural view of the push rod of the present invention.
Reference numerals illustrate: 1-puncture body, 2-outer cannula, 3-puncture tip, 4-puncture handle, 5-push rod elastomer, 6-cannula end limit step, 7-cannula elastomer, 8-elastomer connection step, 9-bullet pin body, 10-push rod, 11-cannula locating hole, 12-internal resistance connector, 13-tip connector, 14-tip connection locating hole, 15-bullet pin mounting hole, 16-push rod hole, 17-push rod elastomer step, 18-locking tube, 19-push connection block, 20-locking head, 21-locking tube elastomer, 22-bolt rod, 23-bolt rod block, 24-elastomer connection block and 25-push contact slope.
Detailed Description
The invention will be further described with reference to the following specific drawings and examples.
As shown in fig. 1: in order to meet the requirements of puncture, realize protection after puncture and improve the convenience of use and operation, the invention comprises a puncture body 1 and an outer sleeve 2 sleeved on the head of the puncture body 1, wherein the head end of the puncture body 1 is provided with a puncture tip 3 for puncture, the outer sleeve 2 can move along the length direction of the puncture body 1 at the head of the puncture body 1, and the puncture tip 3 can be exposed from the head end of the outer sleeve 2 when the outer sleeve 2 and the puncture body 1 relatively move;
the puncture needle also comprises a cannula motion driving mechanism for pushing the cannula 2 to move when the puncture tip 3 passes through the puncture area and a cannula locking mechanism for locking the position between the cannula 2 and the puncture body 1;
pressing the tail of the puncture body 1 causes the outer sleeve 2 to move relative to the puncture body 1 and enables the puncture tip 3 to be exposed from the head end of the outer sleeve 2 so as to perform the required puncture by using the puncture tip 3; when the puncture tip 3 penetrates through the region to be punctured, the sleeve motion driving mechanism drives the outer sleeve 2 to move relative to the puncture body 1, so that the puncture tip 3 is positioned in the outer sleeve 2, and when the puncture tip 3 enters the outer sleeve 2, the outer sleeve 2 and the puncture body 1 are locked and kept in the current position state through the sleeve locking mechanism.
Specifically, the puncture body 1 and the outer sleeve 2 are made of materials meeting medical standards, the puncture body 1 is in a rod-like structure, the outer diameter of the outer sleeve 2 is larger than the outer diameter of the head end of the puncture body 1, and therefore the outer sleeve 2 can be sleeved on the puncture body 1. The puncture tip 3 is positioned at the head end of the puncture body 1, and the puncture operation can be completed by using the puncture tip 3. In general, the puncture tip 3 and the puncture body 1 are coaxially distributed, the outer sleeve 2 is sleeved on the puncture body 1, the outer sleeve 2 and the puncture body 1 are coaxially distributed, and the length direction of the puncture body 1 is consistent with the axis of the puncture body 1, so that the outer sleeve 2 can move on the puncture body 1 along the axis of the puncture body 1. When the outer sleeve 2 moves towards the tail end of the puncture body 1, the puncture tip 3 can be exposed from the head end of the outer sleeve 2, and the puncture operation cannot be influenced after the puncture tip 3 is exposed from the head end of the outer sleeve 2; when the outer sleeve 2 moves towards the head end of the puncture body 1, the puncture tip 3 can be positioned in the outer sleeve 2, and when the puncture tip 3 is positioned in the outer sleeve 2, the damage to the organ tissue caused by the contact of the puncture tip 3 can be avoided.
The tail end of the puncture body 1 is provided with a puncture handle 4, the puncture body 1 forms the outer diameter of the puncture handle 4 larger than the outer diameters of other positions of the puncture body 1, and the whole puncture body 1 is convenient to hold through the puncture handle 4. Before the puncturing operation, the puncture body 1 is sleeved with a curved road card, and the curved road card is used for contacting the skin of the region to be punctured. After the position of the puncture area is determined, the puncture tip 3 is positioned by the curved road card, the puncture tip 3 is ensured to penetrate out of the head end of the outer sleeve 2, the puncture body 1 is pressed by the puncture handle 4, the puncture tip 3 at the head end of the puncture body 1 is contacted with the skin of the area to be punctured, and the puncture tip 4 can penetrate through the area to be punctured along with the continuous pressing of the puncture body 1 by the puncture handle 4.
When penetrating through the region to be punctured, the puncture tip 3 and the outer sleeve 2 can enter the abdominal cavity, in order to avoid unnecessary damage to the puncture tip 3, the sleeve motion driving mechanism simultaneously pushes the outer sleeve 2 to move, after the outer sleeve 2 moves, the puncture tip 3 is positioned in the outer sleeve 2, and at the moment, the puncture tip 3 is in a non-exposure state. In order to ensure the reliability of shielding protection of the puncture tip 3 by the outer sleeve 2, the position state of the outer sleeve 2 and the puncture body 1 is locked by the sleeve locking mechanism, and after the outer sleeve 2 and the puncture body 1 are locked by the sleeve locking mechanism, the outer sleeve 2 and the puncture body 1 do not move relatively when the puncture body 1 is pressed by the puncture handle 4, so that the puncture tip 3 can be always positioned in the outer sleeve 2, and the purpose of stable and effective protection is achieved.
As shown in fig. 2, the sleeve motion driving mechanism comprises a sleeve elastic body 7 sleeved on the puncture body 1, one end of the sleeve elastic body 7 is connected with an elastic body connecting step 8 on the puncture body 1, and the other end of the sleeve elastic body 7 is connected with an internal resistance connecting body 12 in the outer sleeve 2; when the puncture tip 3 is exposed from the head end of the outer cannula 2, the cannula elastic body 7 is in a compressed state; when the puncture tip 3 penetrates the region to be punctured, the sleeve elastic body 7 can push the outer sleeve 2 to move so that the puncture tip 3 is positioned in the outer sleeve 2.
In the embodiment of the invention, the sleeve elastic body 7 can be made of elastic components such as a spring, the sleeve elastic body 7 can be sleeved on the puncture body 1, one end of the sleeve elastic body 7 is connected with the elastic body connecting step 8, the other end of the sleeve elastic body 7 is connected with the inner resistance connecting block 12 in the outer sleeve 2, and the inner resistance connecting block 12 is in a bump form in an annular shape or symmetrical distribution in the outer sleeve 2. Before the puncture body 1 is pressed and the region to be punctured is not penetrated, the head end of the outer sleeve 2 is propped against the region to be punctured, and the puncture tip 3 is exposed from the head end of the outer sleeve 2 and punctures the region to be punctured; since the head end of the outer sleeve 2 abuts the region to be pierced and before being pierced, the sleeve elastomer 7 is compressed within the outer sleeve 2 between the elastomer connection step 8 and the inner resistance connector 12. When the puncture tip 3 penetrates through the region to be punctured, the interaction force of the head end of the outer sleeve 2 disappears as the outer sleeve 2 enters the abdominal cavity, the sleeve elastic body 7 in a compressed state can push the outer sleeve 2 to move towards the tail end direction far away from the puncture body 1, and the puncture tip 3 can be enclosed in the outer sleeve 2 after the outer sleeve 2 moves. Because the head end of the outer sleeve 2 is in a passivation state, compared with the puncture tip 3, no damage is caused to organ tissues.
Of course, in the specific implementation, the cannula motion driving mechanism may take other forms, as long as the cannula motion driving mechanism can push the outer cannula 2 to move after the puncture tip 3 is penetrated, so that the puncture tip 3 is located in the outer cannula 2, and the specific forms can be selected according to needs and are not listed here.
As shown in fig. 2, 3 and 5, the sleeve locking mechanism comprises a pin body 9 arranged at the head of the puncture body 1, a pin mounting hole 15 allowing the pin body 9 to be embedded is arranged at the head end of the puncture body 1, the pin mounting hole 15 penetrates through the puncture body 1, and the length direction of the pin mounting hole 15 is perpendicular to the length direction of the puncture body 1;
the outer sleeve 2 is provided with the sleeve positioning hole 11, the elastic pin body 9 can move in the elastic pin mounting hole 15, the head end of the elastic pin body 9 can extend into the sleeve positioning hole 11, and when the head end of the elastic pin body 9 extends into the sleeve positioning hole 11, the outer sleeve 2 and the puncture body 1 can be locked with each other.
In the embodiment of the invention, the elastic mounting hole 15 is arranged at the head end of the puncture body 1 in a penetrating way, and the axis of the elastic mounting hole 15 is mutually perpendicular to the axis of the puncture body 1. The sleeve positioning hole 11 penetrates through the side wall of the outer sleeve 2, and when the outer sleeve 2 is sleeved on the puncture body 1, the inner blocking connecting block 12 is positioned between the sleeve positioning hole 11 and the elastic body connecting step 8. In addition, still set up sleeve end spacing step 6 on puncture body 1, sleeve end spacing step 6 is located the elastomer and connects between step 8 and the tail end of puncture body 1, utilizes sleeve end spacing step 6 to carry out spacingly to outer sleeve pipe 2 motion on puncture body 1.
When the outer sleeve 2 moves on the puncture body 1, the movement of the elastic pin body 9 on the puncture body 1 is perpendicular to the length direction of the puncture body 1, while the movement of the elastic pin body is along the length direction of the puncture body 1. After the outer sleeve 2 moves, the head end of the elastic pin body 9 stretches into the sleeve positioning hole 11, and the length direction of the elastic pin body 9 is perpendicular to the movement direction of the outer sleeve 2, so that the outer sleeve 2 and the puncture body 1 can be locked through the elastic pin body 9, and the current position state between the outer sleeve 2 and the puncture body 1 can not be kept.
In the concrete implementation, the head end of the elastic pin body 9 stretches into the sleeve positioning hole 11 of the outer sleeve 2 to lock the position states of the outer sleeve 2 and the puncture body 1, so that in order to ensure the matching reliability of the elastic pin body 9 and the sleeve positioning hole 11 of the outer sleeve 2, a guide mechanism is further arranged between the outer sleeve 2 and the puncture body 1, and when the outer sleeve 2 moves on the puncture body 1, the sleeve positioning hole 11 on the outer sleeve 2 can be matched with the head end of the elastic pin body 9. The guide mechanism can adopt the matching form of the guide block and the guide groove, or other needed forms, and can be selected according to the needs, and the details are not repeated here.
As shown in fig. 3, the puncture body 1 and the puncture tip 3 may have an integral structure or a split structure, and when the puncture tip 3 and the puncture body 1 have an integral structure, only the spring pin mounting hole 5 may be provided in the puncture body 1. When the puncture tip 3 and the puncture body 1 adopt a split type connecting structure, the puncture tip 3 is connected with the head end of the puncture body 1 in an adaptive manner through the tip connecting body 13, in order to meet the installation and matching of the bullet pin body 9, a tip connecting positioning hole 14 can be formed in the tip connecting body 13, and when the tip connecting body 13 is sleeved on the puncture body 1, the tip connecting positioning hole 14 is in positive correspondence with the bullet pin installation hole 5 and meets the installation of the bullet pin body 9. Of course, when the puncture tip 3 and the puncture body 1 adopt a split type connection structure, the spring pin mounting hole 5 can still be only arranged on the puncture body 1, so long as the installation of the spring pin body 9 and the matching process of the sleeve positioning hole 11 of the outer sleeve 2 are ensured.
As shown in fig. 4, the latch body 9 includes a locking tube 18 and a locking head 20 disposed outside the head end of the locking tube 18, the locking tube 18 is disposed in the latch mounting hole 15, and the locking head 20 can extend into the sleeve positioning hole 11;
and a locking head pushing mechanism for pushing the locking head 20 to move towards the sleeve positioning hole 11 of the outer sleeve 2 all the time, wherein when the locking head 20 is aligned with the sleeve positioning hole 11 of the outer sleeve 2, the locking head pushing mechanism can push the locking head 20 to extend into the sleeve positioning hole 11.
In the embodiment of the invention, the locking head 20 is always pushed to the sleeve positioning hole 11 of the outer sleeve 2 by the locking head pushing mechanism, so that the locking head 20 can be pushed into the sleeve positioning hole 11 by the locking head pushing mechanism when the outer sleeve 2 moves relative to the puncture body 1 and the sleeve positioning hole 11 is aligned with the locking head 20. The locking head 20 extends into the sleeve positioning hole 11, so that the state between the outer sleeve 2 and the puncture body 1 can be locked.
In particular, the locking head pushing mechanism includes a locking tube elastic body 21 disposed in the locking tube 18 and a locking bolt having one end extending into the locking tube 18, and one end of the locking bolt can be in contact with the locking tube elastic body 21.
In this embodiment of the present invention, the outer diameter of the locking head 20 is smaller than the outer diameter of the locking tube 18, the locking head 20 and the locking tube 18 are coaxially distributed, the locking bolt includes a bolt rod 22 and a bolt rod block 23 located at the end of the bolt rod 22, the bolt rod block 23 is located outside the locking tube 18, and the bolt rod 22 stretches into the locking tube 18 to enable the locking tube elastomer 21 to be in a compressed state.
Through the setting of the direct external diameter of locking head 20 and locking tube 18, can carry out spacingly to the motion of bullet pin body 9, promptly after locking head 20 stretches into sleeve pipe locating hole 11, through the contact of locking tube 18 and outer tube 2 inner wall, realize spacingly to the motion of whole bullet pin body 9, avoid the separation of locking tube 18 and outer tube 2, puncture body 1. The outer diameter of the bolt block 23 is larger than the outer diameter of the bolt 22, and the outer diameter of the bolt block 23 is larger than the inner diameter of the locking tube 18, i.e. the length of the bolt 22 entering the locking tube 18 can be limited by the bolt block 23. The locking tube elastic body 21 is compressed by the bolt 22, so that the locking elastic body 21 can always push the locking tube 18 and the locking head 20 to move in a direction approaching the outer sleeve 2.
When the outer sleeve 2 is sleeved on the puncture body 1, the outer sleeve 2 can only move along the length direction of the puncture body 1 by utilizing the guide mechanism and cannot rotate, namely, after the outer sleeve 2 moves, the locking head 20 can be aligned with the sleeve positioning hole 11 and then extend into the sleeve positioning hole 11. The locking head 20 is close to a side wall of the sleeve positioning hole 11 formed in the outer sleeve 2, the bolt rod block 23 is located between the puncture body 1 and the outer sleeve 2, the bolt rod block 23 is far away from the side wall of the sleeve positioning hole 11, and a gap between the outer sleeve 2 and the puncture body 1 meets the movement requirements among the locking head 20, the locking pipe 18 and the locking bolt.
Further, the puncture needle also comprises a locking release mechanism, wherein the locking release mechanism is matched with the bullet pin body 9, so that the head end of the bullet pin body 9 extending into the sleeve positioning hole 11 exits from the sleeve positioning hole 11, and after the head end of the bullet pin body 9 exits from the sleeve positioning hole 11, the outer sleeve 2 moves relative to the puncture body 1 at the head of the puncture body 1.
In the specific implementation, after the outer sleeve 2 and the puncture body 1 are locked by the elastic pin body 9, when the puncture body 1 is pressed again, the outer sleeve 2 and the puncture body 1 cannot move relatively again, and the puncture tip 3 is always positioned in the outer sleeve 2. In the puncture process, in some cases, it is necessary to perform the puncture twice or more, and when the puncture twice or more is performed, it is necessary to release the lock state of the latch body 9 with respect to the outer tube 2 and the puncture body 1. As is clear from the above description, in order to release the lock state between the outer sleeve 2 and the puncture body 1 by the latch body 9, the tip end of the latch body 9 needs to be withdrawn from the sleeve positioning hole 11, and when the latch body 9 adopts the embodiment of fig. 4, the lock head 20 needs to be withdrawn from the sleeve positioning hole 11.
Further, the unlocking mechanism comprises a push rod 10 used for pushing the elastic pin body 9 to move so that the head end of the elastic pin body 9 exits from the sleeve positioning hole 11, one end of the push rod 10 extends into the puncture body 1, the push rod 10 can move along the length direction of the puncture body 1 in the puncture body 1, and the end part of the push rod 10 extending into the puncture body 1 can be connected with the elastic pin body 9 in an adapting way.
In the embodiment of the invention, the push rod 10 is coaxially distributed with the puncture body 1 in the puncture body 1, a push contact inclined plane 25 is arranged at the end of the push rod 10 extending into the puncture body 1, a push connecting block 19 matched with the push contact inclined plane 25 is arranged on the elastic pin body 9, and when the push contact inclined plane 25 of the push rod 10 contacts with the push connecting block 19 and pushes the push rod 10 towards the direction approaching to the puncture tip 3, the head end of the elastic pin body 9 can be withdrawn from the sleeve positioning hole 11.
The pin body 9 may adopt fig. 4 or other structural forms, taking the test structure of fig. 4 as an example, as shown in fig. 6, the pushing contact inclined plane 25 is inclined, the pushing connection block 19 is disposed on the outer wall of the locking tube 18, the contact surface of the pushing connection block 19 and the pushing contact inclined plane 25 also needs to adopt an inclined state, when the push rod 10 is pushed toward the direction close to the puncture tip 3, the head end of the pin body 9 can be made to withdraw from the sleeve positioning hole 11, i.e., the locking tube 18 moves toward the direction close to the bolt rod block 23 of the locking bolt. In particular, when the push rod 10 is placed in the puncture body 1 and contacts with the push connection block 19, the inclined direction of the push contact inclined surface 25 gradually increases along the direction in which the tail end of the puncture body 1 points to the head end. Thus, when pushing the push rod 10, the locking tube 18 can stretch and retract along the direction perpendicular to the axis of the puncture body 1 by being matched with the pushing connection block 19, so that the locking head 20 can withdraw from the sleeve positioning hole 11. In a specific implementation, the pushing connection blocks 19 may be symmetrically disposed on the locking tube 18, and when the pushing connection blocks 19 are symmetrically distributed on the locking tube 18, the end of the push rod 10 has two pushing contact inclined planes 25 that can be respectively in contact with the pushing connection blocks 19, and after the two pushing contact inclined planes 25 are matched with the pushing connection blocks 19, stability and reliability of movement of the pushing locking tube 18 can be ensured.
Further, the puncture needle also comprises a push rod movement reset mechanism, wherein the push rod movement reset mechanism comprises a push rod elastic body 5 sleeved on the push rod 10 and an elastic body connecting block 24 arranged on the push rod 10, the push rod elastic body 5 is positioned in the puncture body 1, one end of the push rod elastic body 5 is connected with a push rod elastic body step 17 in the puncture body 1, and when the push rod 10 moves towards the direction close to the puncture tip 3, the push rod elastic body 5 is in a compressed state.
In the embodiment of the invention, when the push contact inclined surface 25 of the push rod 10 is matched with the push connecting block 19, so that the locking head 20 is withdrawn from the sleeve positioning hole 11, and the outer sleeve 2 moves, the sleeve positioning hole 11 and the locking head 20 are not aligned any more, at this time, the locking of the outer sleeve 2 and the puncture body 1 cannot be realized. At this time, the push rod 10 is reset by the push rod movement reset mechanism.
As shown in fig. 1 and 5, the push rod elastic body 5 is in the puncture body 1, the elastic body connecting block 24 is convexly arranged on the push rod 10, when the push rod 10 is pushed to move towards the direction close to the puncture tip 3, the push rod elastic body 5 can be compressed, and after the push rod 10 is loosened, the push rod elastic body 5 can enable the push rod 10 to move away from the direction of the puncture tip 3, so that the push rod 10 can be reset. In addition, in order to ensure the stability and reliability of the connection and the cooperation between the pushing contact inclined plane 25 of the push rod 10 and the pushing connection block 19, a push rod motion guiding mechanism can be arranged between the puncture body 1 and the push rod 10, and the push rod motion guiding mechanism can ensure that the push rod 10 always performs linear motion in one direction in the puncture body 1 and cannot rotate in the puncture body 1. The push rod motion guiding mechanism can adopt the matching form of the convex blocks and the guiding grooves, and the specific form can be selected according to the needs, and is not repeated here.
Claims (6)
1. A safety puncture core, which is characterized in that: the puncture needle comprises a puncture body (1) and an outer sleeve (2) sleeved on the head of the puncture body (1), wherein a puncture tip (3) for puncture is arranged at the head end of the puncture body (1), the outer sleeve (2) can move along the length direction of the puncture body (1) at the head of the puncture body (1), and when the outer sleeve (2) and the puncture body (1) relatively move, the puncture tip (3) can be exposed from the head end of the outer sleeve (2);
the puncture needle also comprises a cannula motion driving mechanism for pushing the outer cannula (2) to move when the puncture tip (3) passes through the puncture area and a cannula locking mechanism for locking the position between the outer cannula (2) and the puncture body (1);
pressing the tail of the puncture body (1) to enable the outer sleeve (2) to move relative to the puncture body (1) and enable the puncture tip (3) to be exposed from the head end of the outer sleeve (2) so as to perform required puncture by using the puncture tip (3); when the puncture tip (3) penetrates through the region to be punctured, the sleeve motion driving mechanism drives the outer sleeve (2) to move relative to the puncture body (1) so that the puncture tip (3) is positioned in the outer sleeve (2), and when the puncture tip (3) enters the outer sleeve (2), the outer sleeve (2) and the puncture body (1) are locked and kept in the current position state through the sleeve locking mechanism;
the sleeve motion driving mechanism comprises a sleeve elastic body (7) sleeved on the puncture body (1), one end of the sleeve elastic body (7) is connected with an elastic body connecting step (8) on the puncture body (1), and the other end of the sleeve elastic body (7) is connected with an internal blocking connecting body (12) in the outer sleeve (2); when the puncture tip (3) is exposed from the head end of the outer sleeve (2), the sleeve elastomer (7) is in a compressed state; when the puncture tip (3) penetrates through the region to be punctured, the sleeve elastic body (7) can push the outer sleeve (2) to move so that the puncture tip (3) is positioned in the outer sleeve (2);
the sleeve locking mechanism comprises a bullet pin body (9) arranged at the head of the puncture body (1), a bullet pin mounting hole (15) allowing the bullet pin body (9) to be embedded is arranged at the head end of the puncture body (1), the bullet pin mounting hole (15) penetrates through the puncture body (1) and the length direction of the bullet pin mounting hole (15) is perpendicular to the length direction of the puncture body (1);
the outer sleeve (2) is provided with a sleeve positioning hole (11), the elastic pin body (9) can move in the elastic pin mounting hole (15), the head end of the elastic pin body (9) can extend into the sleeve positioning hole (11), and when the head end of the elastic pin body (9) extends into the sleeve positioning hole (11), the outer sleeve (2) and the puncture body (1) can be mutually locked;
the elastic pin body (9) comprises a locking pipe (18) and a locking head (20) arranged outside the head end of the locking pipe (18), the locking pipe (18) is arranged in the elastic pin mounting hole (15), and the locking head (20) can extend into the sleeve positioning hole (11);
the locking head pushing mechanism is used for pushing the locking head (20) to move towards the sleeve positioning hole (11) of the outer sleeve (2) all the time, and when the locking head (20) is aligned with the sleeve positioning hole (11) of the outer sleeve (2), the locking head pushing mechanism can push the locking head (20) to extend into the sleeve positioning hole (11);
the device further comprises a locking release mechanism, wherein the locking release mechanism is matched with the elastic pin body (9), so that the head end of the elastic pin body (9) extending into the sleeve positioning hole (11) can withdraw from the sleeve positioning hole (11), and after the head end of the elastic pin body (9) withdraws from the sleeve positioning hole (11), the outer sleeve (2) moves relative to the puncture body (1) at the head of the puncture body (1).
2. The safety puncture core of claim 1, wherein: the locking head pushing mechanism comprises a locking pipe elastomer (21) arranged in the locking pipe (18) and a locking bolt with one end extending into the locking pipe (18), wherein one end of the locking bolt can be in contact with the locking pipe elastomer (21).
3. The safety puncture core of claim 2, wherein: the outer diameter of the locking head (20) is smaller than that of the locking pipe (18), the locking head (20) and the locking pipe (18) are coaxially distributed, the locking bolt comprises a bolt rod (22) and a bolt rod block (23) positioned at the end part of the bolt rod (22), the bolt rod block (23) is positioned outside the locking pipe (18), and the bolt rod (22) stretches into the locking pipe (18) to enable the locking pipe elastomer (21) to be in a compressed state.
4. The safety puncture core of claim 1, wherein: the unlocking mechanism comprises a push rod (10) used for pushing the elastic pin body (9) to move so that the head end of the elastic pin body (9) exits from the sleeve positioning hole (11), one end of the push rod (10) stretches into the puncture body (1), the push rod (10) can move in the length direction of the puncture body (1) in the puncture body (1), and the end part of the push rod (10) stretching into the puncture body (1) can be connected with the elastic pin body (9) in an adapting mode.
5. The safety puncture core of claim 4, wherein: push rod (10) in puncture body (1) with puncture body (1) is coaxial distribution, and push rod (10) stretch into the tip of puncture body (1) and have and promote contact inclined plane (25), set up on bullet round pin body (9) with promote the promotion connecting block (19) of contact inclined plane (25) adaptation, after push rod (10) promote contact inclined plane (25) and promote connecting block (19) contact, when pushing push rod (10) to being close to puncture pointed end (3) direction, can make the head end of bullet round pin body (9) withdraw from in sleeve pipe locating hole (11).
6. The safety puncture core of claim 5, wherein: still include push rod motion canceling release mechanical system, push rod motion canceling release mechanical system is including cover push rod elastomer (5) on push rod (10) and set up elastomer connecting block (24) on push rod (10), push rod elastomer (5) are located puncture body (1), one end of push rod elastomer (5) is connected with push rod elastomer step (17) in puncture body (1), when push rod (10) are to being close to puncture pointed end (3) direction motion, push rod elastomer (5) are in compression state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329320.1A CN107898491B (en) | 2017-12-13 | 2017-12-13 | Safety puncture core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329320.1A CN107898491B (en) | 2017-12-13 | 2017-12-13 | Safety puncture core |
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| CN107898491A CN107898491A (en) | 2018-04-13 |
| CN107898491B true CN107898491B (en) | 2023-11-24 |
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| CN201711329320.1A Active CN107898491B (en) | 2017-12-13 | 2017-12-13 | Safety puncture core |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108852472A (en) * | 2018-06-18 | 2018-11-23 | 无锡圣诺亚科技有限公司 | From locking safety-type veress needle |
| CN108938056B (en) * | 2018-08-01 | 2024-04-09 | 四川省医学科学院·四川省人民医院 | Telescopic fixed type endoscopic puncture outfit |
| CN109009251B (en) * | 2018-09-12 | 2024-01-23 | 南京医科大学附属逸夫医院 | Intravascular positioning biopsy device |
| CN111772741A (en) * | 2020-07-07 | 2020-10-16 | 无锡圣诺亚科技有限公司 | Safety pneumoperitoneum needle capable of self-locking |
| CN111658096B (en) * | 2020-07-14 | 2021-11-09 | 青岛市市北区蓝天心理研究所 | Puncture needle for medical treatment |
| CN112545701B (en) * | 2020-12-03 | 2023-03-24 | 苏州大学 | Wire bolt, fixer, wire bolt operating device and using method |
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| US5318584A (en) * | 1992-04-13 | 1994-06-07 | Boehringer Mannheim Gmbh | Blood lancet device for withdrawing blood for diagnostic purposes |
| CN101953706A (en) * | 2009-07-16 | 2011-01-26 | 上海交通大学医学院附属新华医院 | Special puncture outfit for single-pore peritoneoscope |
| CN107320161A (en) * | 2017-08-30 | 2017-11-07 | 无锡圣诺亚科技有限公司 | Core is punctured from retraction |
| CN107361829A (en) * | 2017-08-30 | 2017-11-21 | 无锡圣诺亚科技有限公司 | Cored structure is punctured from retraction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013173617A1 (en) * | 2012-05-16 | 2013-11-21 | The Seaberg Company, Inc. | Safety needle |
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| US5318584A (en) * | 1992-04-13 | 1994-06-07 | Boehringer Mannheim Gmbh | Blood lancet device for withdrawing blood for diagnostic purposes |
| CN101953706A (en) * | 2009-07-16 | 2011-01-26 | 上海交通大学医学院附属新华医院 | Special puncture outfit for single-pore peritoneoscope |
| CN107320161A (en) * | 2017-08-30 | 2017-11-07 | 无锡圣诺亚科技有限公司 | Core is punctured from retraction |
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| CN107898491A (en) | 2018-04-13 |
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