CN111658096B - Puncture needle for medical treatment - Google Patents
Puncture needle for medical treatment Download PDFInfo
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- CN111658096B CN111658096B CN202010672272.1A CN202010672272A CN111658096B CN 111658096 B CN111658096 B CN 111658096B CN 202010672272 A CN202010672272 A CN 202010672272A CN 111658096 B CN111658096 B CN 111658096B
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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
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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
- A61B17/3403—Needle locating or guiding means
-
- 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
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
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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
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
-
- 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
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
-
- 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
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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
- A61B17/3403—Needle locating or guiding means
- A61B2017/3405—Needle locating or guiding means using mechanical guide means
-
- 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
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Gastroenterology & Hepatology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A medical puncture needle relates to the technical field of medical treatment and comprises a handle, a fixed block, a linking part, a limiting part, a first sleeve, a second sleeve and a needle head, wherein the rear end of the needle head is connected with a hard flow guide pipe; a compression spring is arranged between the fixing block and the first sleeve, and a limiting part is further arranged on the limiting part. The puncture needle has a simple structure, is convenient to use, and can easily shield the sharp puncture part by the second sleeve pipe while puncturing; meanwhile, the movable second sleeve is arranged, so that puncture positioning can be facilitated, the puncture process is delayed, the controllable feeling of an operator is increased, and puncture errors are greatly reduced.
Description
Technical Field
The invention relates to the technical field of medical treatment, in particular to a medical puncture needle.
Background
Clinically, a puncture needle is often used for infusion, blood drawing and drainage, after the puncture needle is usually punctured, the sharp part of the needle head moves to easily puncture other tissues and organs, so that medical accidents are caused, small medical accidents can be solved by puncturing again, and great medical accidents are easy to cause dangers.
In the conventional patent documents, there is a proposal of providing a sleeve at a sharp part of a needle and shielding the needle after puncturing to prevent the sharp part from puncturing, however, most of the proposals have complicated structures and poor practicability, and are not wide in practical application.
In addition, in the process of puncturing by an operator, because the sharp part of the needle head is very sharp, the needle head is easy to puncture a blood vessel or be separated from a preset position, so that the needle bulging phenomenon is caused, the repositioning or the re-puncturing is needed, the pain of a patient is increased, the puncturing difficulty is improved, for some old patients with thin blood vessels or a plurality of old patients, the puncturing is often completed by operators with experience for many years, and common operators are difficult to perform.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a medical puncture needle, aiming at improving the use convenience of the puncture needle on the basis of protecting the sharp part of a needle head, so that the puncture needle capable of protecting a patient from accidental puncture has higher practicability, and in addition, the puncture needle can not deviate from a preset position due to over sharp during puncture through a special design.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a medical puncture needle comprises a handle, a fixed block, a joint part, a limiting part, a first sleeve, a second sleeve and a needle head, wherein the front end of the needle head is provided with a spine part, the rear end of the needle head is connected with a hard guide tube, the second sleeve is sleeved on the front part of the needle head and is in sliding connection with the outer wall surface of the needle head, the front end of the first sleeve is fixedly connected with the rear end of the second sleeve, the rear end of the needle head extends into the first sleeve, the inner wall surface of the first sleeve is in sliding connection with the outer wall surface of the hard guide tube, the front end of the handle is fixedly connected with the rear end of the fixed block, the front end of the fixed block is fixedly connected with the rear end of the joint part, the front end of the joint part and the rear end of the limiting part are integrally formed, a slide hole is formed in the center of the joint part and the limiting part, the rear end of the first sleeve extends into the slide hole, the rear end of the hard guide pipe penetrates through the rear end of the first sleeve, extends backwards through the fixed block and the rear end face of the handle and forms a hose joint, and the hard guide pipe is fixedly connected with the fixed block and the handle; the hard guide pipe is characterized in that a compression spring is further sleeved on the periphery of the hard guide pipe between the front end face of the fixed block and the rear end of the first sleeve, a limiting part used for locking, releasing and positioning the first sleeve is further arranged on the limiting part, and the front end of the second sleeve partially or completely shields the spine part.
Preferably, the limiting part comprises a first sliding groove which is located on the surface of the outer wall of the first sleeve and is arranged along the axis direction of the first sleeve, the rear end of the first sliding groove extends into the sliding hole, a first positioning hole is formed in the limiting part along the direction perpendicular to the first sleeve, a first positioning rod is arranged in the first positioning hole, and the lower end of the first positioning rod is inserted into the first sliding groove and is connected with the first sliding groove in a sliding mode.
Preferably, the front end of the second sleeve completely shields the spine portion, and when the second sleeve is not punctured, the lower end of the first positioning rod is located in the middle of the first sliding groove and can slide back and forth along the groove bottom of the first sliding groove.
Preferably, when the puncture needle is not punctured, the lower end of the rear side wall of the first locating rod abuts against the rear groove wall of the first sliding groove, part of the end part of the spine part of the needle head extends out of the front end of the second sleeve, the first locating rod can move up and down along the first locating hole, when the needle head moves upwards, the first locating rod is separated from the first sliding groove, the compression spring pushes the first sleeve to move forwards, and the spine part of the needle head is shielded by the second sleeve.
Preferably, the limiting part further comprises a second sliding groove which is located on the surface of the outer wall of the first sleeve and is arranged along the axis direction of the first sleeve, the rear end of the second sliding groove extends into the sliding hole, a second positioning hole is formed in the limiting part in the direction perpendicular to the first sleeve, a second positioning rod is arranged in the second positioning hole, the bottom of the second positioning rod is inserted into the second sliding groove and is in sliding connection with the second sliding groove, a limiting hole is further formed in the bottom of the second sliding groove on the rear side of the second positioning rod, when the first positioning rod is separated from the first sliding groove, the compression spring pushes the first sleeve to move forwards, the bottom of the second positioning rod can be inserted into the limiting hole, when the bottom of the second positioning rod is inserted into the limiting hole, the sharp thorn of the needle head is shielded by the front end of the second sleeve, and the front end of the second sleeve is flushed with the front end of the sharp thorn.
Preferably, the first positioning rod is in threaded connection with the first positioning hole.
Preferably, a second mounting groove coaxial with the second positioning hole is formed in the second positioning hole, a second reset spring is arranged in the second mounting groove, the second reset spring is sleeved outside the second positioning rod, one end of the second reset spring is fixedly connected with the inner groove wall of the second mounting groove, the other end of the second reset spring is connected with the side groove wall of the second mounting groove in a sliding mode through a second annular sliding block, and the surface of the inner side wall of the second annular sliding block is fixedly connected with the surface of the outer wall of the second positioning rod.
Preferably, first locating hole in seted up with the coaxial first mounting groove of first locating hole, first mounting groove in be equipped with first reset spring, first reset spring cover locate outside first locating rod, and the inner cell wall fixed connection of one end and first mounting groove, the other end passes through the side cell wall sliding connection of first annular slider and first mounting groove, the inside wall surface fixed connection of first annular slider and the outer wall surface of first locating rod.
Preferably, the front end of the first sleeve is provided with a chamfer matched with the sharp-pointed part for use.
Preferably, the handle, the hard guide pipe, the connecting part and the limiting part are made of transparent medical pvc materials.
The medical puncture needle has the following beneficial effects: the puncture needle has a simple structure, is convenient to use, can easily shield the sharp-pointed part by the second sleeve while puncturing, and avoids the damage caused by the displacement of the sharp-pointed part; meanwhile, the movable second sleeve is arranged, so that puncture positioning can be facilitated, the puncture process is delayed, the controllable feeling of an operator is increased, and puncture errors are greatly reduced.
Drawings
FIG. 1: front view of the invention;
FIG. 2: a cross-sectional view of the present invention;
FIG. 3: the invention A is a schematic diagram of a local enlarged structure;
FIG. 4: the invention B is a schematic diagram of a local enlarged structure;
FIG. 5: a schematic structural diagram of another embodiment of the present invention;
FIG. 6: the invention C is a partial enlarged structure schematic diagram;
FIG. 7: the second sleeve shields the spine part;
FIG. 8: the invention D is a partial enlarged structure diagram;
1: a handle, 2: engagement portion, 3: spacing portion, 4: first sleeve, 5: second sleeve, 6: spine portion, 7: first positioning rod, 8: second positioning rod, 9: fixed block, 10: hose coupler, 11: needle, 12: mount pad, 13: hard guide pipe, 14: through hole, 15: compression spring, 16: first positioning hole, 17: second positioning hole, 18: second mounting groove, 19: second ring-shaped slider, 20: second return spring, 21: first mounting groove, 22: first return spring, 23: first annular slider, 24: slide hole, 4-1: first sleeve inner hole, 4-2: first runner, 4-3: second runner, 4-4: limiting hole, 5-1: and (6) chamfering.
Detailed Description
In the following, embodiments of the present invention are described in detail in a stepwise manner, which is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only used for describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, the present invention is not to be construed as being limited thereto.
For convenience of understanding, the present invention is based on the principle that the spike 6 shown in fig. 1 is oriented forward, the hose connector 10 is oriented backward, and the rest is analogized based on the above.
Examples 1,
As shown in fig. 1 and 2, a medical puncture needle comprises a handle 1, a fixed block 9, a joint part 2, a limit part 3, a first sleeve 4, a second sleeve 5 and a needle 11, wherein the front end of the needle 11 is provided with a spine part 6, the rear end of the needle is connected with a hard guide tube 13, the second sleeve 5 is sleeved on the front part of the needle 11 and is in sliding connection with the outer wall surface of the needle, the front end of the first sleeve 4 is fixedly connected with the rear end of the second sleeve 5, the rear end of the needle extends into the first sleeve 4, the inner wall surface of the first sleeve 4 is in sliding connection with the outer wall surface of the hard guide tube 13, the front end of the handle 1 is fixedly connected with the rear end of the fixed block 9 and can be integrally formed, the front end of the fixed block 9 is fixedly connected with the rear end of the joint part 2 and can be integrally formed, the front end of the joint part 2 is integrally formed with the rear end of the limit part 3, as shown in fig. 3, a sliding hole 24 is formed in the center of the connecting part 2 and the limiting part 3, the rear end of the first sleeve 4 extends into the sliding hole 24 and is slidably connected with the sliding hole 24, as shown in fig. 2, the rear end of the hard guide tube 13 passes through the rear end of the first sleeve 4 and extends backwards through the fixed block 9 and the rear end surface of the handle 1 to form a hose joint 10, and the hard guide tube 13 is fixedly connected with the fixed block 9 and the handle 1; as shown in fig. 3, a compression spring 15 is further sleeved on the periphery of the hard flow guide tube 13 between the front end surface of the fixed block and the left end of the first sleeve 4, a limiting component for locking, releasing and positioning the first sleeve 4 is further arranged on the limiting portion 3, and the front end of the second sleeve 5 partially or completely shields the spine portion 6.
In this embodiment, the second sleeve 5 is sleeved outside the needle 11, during puncturing, the resistance of puncturing is increased due to the blocking of the front end of the second sleeve 5, the puncturing process is delayed, so that the defect that the blood vessel is completely punctured (the blood vessel is partially or completely separated from the blood vessel to cause a drumhead) in the instant when the sharp part 6 is too sharp is avoided, when the sharp part 6 punctures the blood vessel, blood flashback occurs, the puncturing is in place, the force is stopped at the moment, and the second sleeve 5 enters the blood vessel along the puncture hole of the sharp part on the surface of the skin under the thrust of the compression spring 15 and shields the sharp part.
It should be understood that the elastic force range of the compression spring 15 is adapted to the stress of the skin of the human body, so that the compression spring can be retracted under the resistance of the skin, and when the puncture hole of the spine portion 6 on the skin surface is about to be formed or formed, the puncture hole can break through the obstruction of the skin and enter the blood vessel, and the specific value of the elastic force range can be determined according to clinical tests.
Examples 2,
On the basis of embodiment 1, the present embodiment is further improved, specifically:
as shown in fig. 3, the limiting component includes a first sliding groove 4-2 located on the outer wall surface of the first sleeve 4 and arranged along the axis direction of the first sleeve 4, the rear end of the first sliding groove 4-2 extends into the sliding hole 24, a first positioning hole 16 is formed in the limiting portion 3 along the direction perpendicular to the first sleeve 4, a first positioning rod 7 is arranged in the first positioning hole, and the lower end of the first positioning rod 7 is inserted into the first sliding groove 4-2 and is slidably connected with the first sliding groove 4-2.
Examples 3,
On the basis of embodiment 2, the present embodiment makes further improvements, specifically:
the front end of the second sleeve 5 completely shields the spine 6, and when the puncture is not performed, the lower end of the first positioning rod 7 is located in the middle of the first sliding groove 4-2 and can slide back and forth along the bottom of the first sliding groove 4-2 (not shown in the figure, the shape is similar to the position relation between the bottom of the second positioning rod 8 and the second sliding groove 4-3, except that the first sliding groove 4-2 is not provided with a limiting hole).
In this embodiment, when puncturing, the handle 1 is held, the two side edges of the second cannula 5 are firstly abutted against the two sides of the blood vessel, so that the spine portion 6 included in the second cannula is positioned at the position aligned with the center line of the blood vessel, then the handle 1 is lightly pushed to perform puncturing action, the skin extrudes the second cannula 5, the spine portion 6 is exposed and pierces the blood vessel, the puncturing is stopped at the moment of blood flashback, and the second cannula 5 enters the blood vessel under the extrusion of the compression spring 15, and the spine portion is completely shielded. It can be seen that this embodiment provides the simplest puncture using structure, and both can pinpoint the puncture position, use second sleeve 5 to support the blood vessel both sides promptly, avoided during the puncture, the shake of staff, especially hand shake in the twinkling of an eye when nervous and the deviation of puncture point position that leads to, when the puncture was accomplished, second sleeve 5 was in the twinkling of an eye completely shielded point thorn portion 6, had avoided the damage that point thorn portion activity brought. Meanwhile, as the second cannula 5 enters the blood vessel, the possibility that the spike 6 completely pierces the blood vessel is greatly reduced due to the damping effect of the second cannula itself.
In the present embodiment, only the blood vessel puncture is taken as an example for explanation, and the rest may be done in the same way.
Examples 4,
On the basis of embodiment 2, the present embodiment makes further improvements, specifically:
as shown in fig. 2 and 3, when the puncture is not performed, the lower end of the rear side wall of the first positioning rod 7 abuts against the rear groove wall of the first sliding groove 4-2, and a part of the end of the spike portion 6 of the needle 11 extends out of the front end of the second sleeve 5, the first positioning rod 7 can move up and down along the first positioning hole 16, when the puncture is performed, the first positioning rod 7 is separated from the first sliding groove, the compression spring 15 pushes the first sleeve 4 to move forward, and the second sleeve 5 shields the spike portion 6 of the needle.
In this embodiment, some operators prefer to directly view the spine portion 6 for puncturing, so the front end of the second sleeve 5 shields the spine portion 6, when the spine portion 6 partially pierces the blood vessel, the operator can feel a resistance obviously due to the blockage of the second sleeve 5, and at this time, the speed should be reduced until the spine portion completely enters the blood vessel, blood instantly flashes back to stop puncturing, the second sleeve 5 enters the blood vessel as described above, the spine portion 6 is partially shielded, then the first positioning rod 7 is moved upwards to release the blockage of the first sliding groove 4-2, and the second sleeve 5 is moved forwards continuously under the pushing force of the compression spring 15 to completely shield the spine portion.
It should be understood that the compression spring 15 may be fully extended without allowing excessive extension travel of the compression spring 15 by fully shielding the spike.
Example 5:
on the basis of embodiment 4, this embodiment makes further improvements, specifically:
as shown in fig. 3, the position-limiting component further includes a second sliding groove 4-3 located on the outer wall surface of the first sleeve 4 and arranged along the axial direction of the first sleeve 4, the rear end of the second sliding groove 4-3 extends into the sliding hole 24, a second positioning hole 17 is arranged on the position-limiting portion 3 along the direction perpendicular to the first sleeve 4, a second positioning rod 8 is arranged in the second positioning hole 17, the bottom of the second positioning rod 8 is inserted into the second sliding groove 4-3 and is connected with the second sliding groove 4-3 in a sliding manner, a position-limiting hole 4-4 is further arranged at the bottom of the second sliding groove 4-3 at the rear side of the second positioning rod 8, when the first positioning rod 7 is separated from the first sliding groove and the compression spring 15 pushes the first sleeve 4 to move forward, the bottom of the second positioning rod 8 can be inserted into the position-limiting hole 4-4, and when the bottom of the second positioning rod 8 is inserted into the position-limiting hole 4-4, the forward end of the second sleeve 5 shields the spike 6 of the needle and the forward end of the second sleeve 5 is flush with the forward end of the spike 6.
In this embodiment, the second positioning rod 8 is locked by the limiting holes 4-4, so that the second sleeve 5 cannot be displaced when the spike part 6 is completely shielded, and the spike part 6 is ensured not to be exposed again, and in cooperation with embodiment 4, after the first positioning rod 7 is unlocked, the second positioning rod 8 is locked and positioned again, and the positioning conversion of the spike part 6 being completely shielded is completed.
Example 6:
on the basis of embodiment 5, the present embodiment is further improved, specifically:
the first positioning rod 7 is in threaded connection with the first positioning hole 16.
Example 7:
on the basis of embodiment 5, the present embodiment is further improved, specifically:
as shown in fig. 4 to 6, a second mounting groove 18 coaxial with the second positioning hole is formed in the second positioning hole 17, a second return spring 20 is arranged in the second mounting groove 18, the second return spring 20 is sleeved outside the second positioning rod 8, one end of the second return spring is fixedly connected with the inner end groove wall of the second mounting groove 18, the other end of the second return spring is slidably connected with the side groove wall of the second mounting groove 18 through a second annular sliding block 19, and the surface of the inner side wall of the second annular sliding block 19 is fixedly connected with the surface of the outer wall of the second positioning rod 8;
first locating hole 16 in seted up with the coaxial first mounting groove 21 of first locating hole, first mounting groove 21 in be equipped with first reset spring 22, first reset spring 22 cover locate first locating rod 7 outside, and one end and the inner cell wall fixed connection of first mounting groove 21, the other end is through the side wall sliding connection of first annular slider 23 and first mounting groove 21, the inside wall surface of first annular slider 23 and the outer wall fixed surface of first locating rod 7 be connected.
In this embodiment, under the pulling of the return spring, the first positioning rod 7 and the second positioning rod 8 respectively abut against the first sliding groove 4-2 and the second sliding groove 4-3, when in use, the first positioning rod 7 can be pulled up to be separated from the first sliding groove 4-2, and the second positioning rod 8 can automatically enter the limiting hole 4-4 under the pulling of the return spring.
Example 8:
on the basis of the above embodiments, the present embodiment is further improved, specifically:
as shown in fig. 8, a chamfer 5-1 used in cooperation with the spike 6 is arranged at the front end of the first sleeve 5;
the handle 1, the hard guide pipe 13, the connecting part 2 and the limiting part 3 are made of transparent medical pvc materials.
In this embodiment, the handle 1, the rigid duct 13, the connecting portion 2, and the limiting portion 3 made of transparent medical pvc material can facilitate observation of the flashback phenomenon of blood, and the chamfer 5-1 can make the first cannula 5 better fit with the spine portion 6.
Claims (6)
1. A medical puncture needle characterized by: comprises a handle, a fixed block, a joint part, a limit part, a first sleeve, a second sleeve and a needle head, wherein the front end of the needle head is provided with a spine part, the rear end of the needle head is connected with a hard guide pipe, the second sleeve is sleeved on the front part of the needle head and is in sliding connection with the outer wall surface of the needle head, the front end of the first sleeve is fixedly connected with the rear end of the second sleeve, the rear end of the needle head extends into the first sleeve, the inner wall surface of the first sleeve is in sliding connection with the outer wall surface of the hard guide pipe, the front end of the handle is fixedly connected with the rear end of the fixed block, the front end of the fixed block is fixedly connected with the rear end of the joint part, the front end of the joint part and the rear end of the limit part are integrally formed, a slide hole is arranged at the center of the joint part and the limit part, the rear end of the first sleeve extends into the slide hole and is in sliding connection with the slide hole, the rear end of the hard guide pipe penetrates through the rear end of the first sleeve, extends backwards through the fixed block and the rear end face of the handle and forms a hose joint, and the hard guide pipe is fixedly connected with the fixed block and the handle; a compression spring is further sleeved between the front end face of the fixed block and the rear end of the first sleeve and on the periphery of the hard guide pipe, a limiting part used for locking, releasing and positioning the first sleeve is further arranged on the limiting part, and the front end of the second sleeve partially or completely shields the spine part;
the limiting part comprises a first sliding groove which is positioned on the surface of the outer wall of the first sleeve and is arranged along the axis direction of the first sleeve, the rear end of the first sliding groove extends into the sliding hole, a first positioning hole is formed in the limiting part along the direction vertical to the first sleeve, a first positioning rod is arranged in the first positioning hole, and the lower end of the first positioning rod is inserted into the first sliding groove and is in sliding connection with the first sliding groove;
the front end of the second sleeve completely shields the spine part, and when the second sleeve is not punctured, the lower end of the first positioning rod is positioned in the middle of the first sliding groove and can slide back and forth along the groove bottom of the first sliding groove;
when the puncture needle is not punctured, the lower end of the outer surface of one side, facing the connecting part, of the first positioning rod is abutted against the rear groove wall of the first sliding groove, part of the end part of the spine part of the needle head extends out of the front end of the second sleeve, the first positioning rod can move up and down along the first positioning hole, when the first positioning rod moves up, the first positioning rod is separated from the first sliding groove, the compression spring pushes the first sleeve to move forward, and the second sleeve shields the spine part of the needle head;
the limiting component further comprises a second sliding groove which is located on the surface of the outer wall of the first sleeve and is arranged along the axis direction of the first sleeve, the rear end of the second sliding groove extends into the sliding hole, a second positioning hole is formed in the limiting portion in the direction perpendicular to the first sleeve, a second positioning rod is arranged in the second positioning hole, the bottom of the second positioning rod is inserted into the second sliding groove and is connected with the second sliding groove in a sliding mode, a limiting hole is further formed in the bottom of the second sliding groove in the rear side of the second positioning rod, when the first positioning rod is separated from the first sliding groove, the compression spring pushes the first sleeve to move forwards, the bottom of the second positioning rod can be inserted into the limiting hole, when the bottom of the second positioning rod is inserted into the limiting hole, the sharp thorn portion of the needle head is shielded by the front end of the second sleeve, and the front end of the second sleeve is flushed with the front end of the sharp thorn portion.
2. A medical needle in accordance with claim 1, wherein: the first positioning rod is in threaded connection with the first positioning hole.
3. A medical needle according to claim 2 wherein: the second positioning hole is internally provided with a second mounting groove coaxial with the second positioning hole, a second reset spring is arranged in the second mounting groove, the second reset spring is sleeved outside the second positioning rod, one end of the second reset spring is fixedly connected with the inner groove wall of the second mounting groove, the other end of the second reset spring is connected with the side groove wall of the second mounting groove in a sliding mode through a second annular sliding block, and the surface of the inner side wall of the second annular sliding block is fixedly connected with the surface of the outer wall of the second positioning rod.
4. A medical needle in accordance with claim 3, wherein: first locating hole in seted up with the coaxial first mounting groove of first locating hole, first mounting groove in be equipped with first reset spring, first reset spring cover locate outside first locating rod, and the inner cell wall fixed connection of one end and first mounting groove, the other end is through the side wall sliding connection of first annular slider and first mounting groove, the inside wall surface fixed connection of first annular slider and the outer wall surface of first locating rod.
5. A medical needle in accordance with claim 4, wherein: the front end of the second sleeve is provided with a chamfer matched with the spine part for use.
6. A medical needle in accordance with claim 5, wherein: the handle, the hard guide pipe, the connecting part and the limiting part are made of transparent medical pvc materials.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010672272.1A CN111658096B (en) | 2020-07-14 | 2020-07-14 | Puncture needle for medical treatment |
Applications Claiming Priority (1)
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CN202010672272.1A CN111658096B (en) | 2020-07-14 | 2020-07-14 | Puncture needle for medical treatment |
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CN111658096A CN111658096A (en) | 2020-09-15 |
CN111658096B true CN111658096B (en) | 2021-11-09 |
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CN202010672272.1A Active CN111658096B (en) | 2020-07-14 | 2020-07-14 | Puncture needle for medical treatment |
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CN113081189B (en) * | 2021-03-02 | 2022-11-01 | 安徽合众智信科技咨询有限公司 | A portable cricothyroid membrane puncture needle subassembly for cricothyroid membrane puncture art |
CN115919431B (en) * | 2023-03-09 | 2023-06-09 | 上海微创电生理医疗科技股份有限公司 | Atrial septum puncture device |
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Effective date of registration: 20220902 Address after: No. 23, North Section, East Gate, Yuncheng Town, Yuncheng County, Heze City, Shandong Province, 274700 Patentee after: Pang Aijun Address before: 679 Tongle Road, Shibei District, Qingdao, Shandong Province Patentee before: QINGDAO SHIBEI INSTITUTE OF BLUE SKY PSYCHOLOGY |