CN108852371B - Safety blood taking needle - Google Patents
Safety blood taking needle Download PDFInfo
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- CN108852371B CN108852371B CN201810863636.7A CN201810863636A CN108852371B CN 108852371 B CN108852371 B CN 108852371B CN 201810863636 A CN201810863636 A CN 201810863636A CN 108852371 B CN108852371 B CN 108852371B
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- 239000008280 blood Substances 0.000 title claims abstract description 51
- 210000004369 blood Anatomy 0.000 title claims abstract description 51
- 230000001681 protective effect Effects 0.000 claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 6
- 238000010241 blood sampling Methods 0.000 description 24
- 230000009471 action Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 208000012266 Needlestick injury Diseases 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150541—Breakable protectors, e.g. caps, shields or sleeves, i.e. protectors separated destructively, e.g. by breaking a connecting area
- A61B5/150549—Protectors removed by rotational movement, e.g. torsion or screwing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/15058—Joining techniques used for protective means
- A61B5/150603—Joining techniques used for protective means by rotation, e.g. bayonet or screw
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150664—Pivotable protective sleeves, i.e. sleeves connected to, or integrated in, the piercing or driving device, and which are pivoted for covering or uncovering the piercing element
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150694—Procedure for removing protection means at the time of piercing
- A61B5/150717—Procedure for removing protection means at the time of piercing manually removed
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a safety blood taking needle which comprises a needle core and a protective cover sleeved outside the needle core, wherein a first clamping part is arranged on the needle core, and a second clamping part is arranged on the protective cover; the first clamping part can be clamped on the second clamping part to realize locking, and the first clamping part can rotate out of the second clamping part to realize unlocking. According to the invention, the first clamping part and the second clamping part cannot rotate or slide relatively under the locking state, so that the blood collection process cannot be interrupted in advance due to the movement of the protective cover, and the blood collection process is safer; the method accords with the behavior habit of people, and greatly reduces the work error rate; simple structure, the industrial quantitative production and the assembly of being convenient for, manufacturing cost satisfies medical low consumption material's actual demand.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a safe blood taking needle.
Background
Needlestick injury is an accidental injury deep in the skin sufficient to cause bleeding in the victim, and is one of the occupational hazards faced by clinical staff. This hazard is mainly manifested in three aspects of physical, psychological and social hazards. In terms of bodily hazards, it has now been demonstrated that more than 20 pathogens, including HBV, HIV, can be transmitted through needle sticks; in psychological harm, medical staff can bear fear, anxiety and psychological stress in different degrees after being subjected to needle-stick injuries; in terms of social hazards, many countries currently agree on a way to limit medical staff suffering from HBV from performing invasive operations for patients.
Therefore, the safety blood sampling technology is a clear requirement of the current medical and clinical detection institutions on the protection of medical staff.
The Chinese patent with the publication number of CN107212893A discloses a spring-pressed blood taking needle, and the blood taking needle mainly comprising a spring or other ejection devices has stronger self-destruction and needling prevention functions, but has the problems of more parts, complex structure and the like in the ejection structure; and meanwhile, the device is directly ejected on the body of a patient, and the flying bullet of the blood sample and discomfort of the patient caused by vibration exist.
Chinese patent with publication number CN206007256U discloses a retractable safety blood taking needle, which relies on the mutual cooperation of parts such as a buckle, a clamping groove and the like, so that a sleeve expanding tube slides relative to a needle core along the axial direction of the needle core in the blood taking process, and the safety of the blood taking process is ensured. In order to avoid the blocking, the clamping force between the clamping buckle and the clamping groove is not set to be larger generally, so that the false operation of a worker can cause the sliding of the sleeve tube relative to the needle core in the blood sampling process, thereby causing difficult blood sampling and even interruption of the blood sampling process.
Disclosure of Invention
The invention aims to provide a safe blood taking needle, which solves the problems that the blood taking needle in the prior art is complex in structure and difficult to produce and assemble in volume, and the risk of sliding of a protective cover relative to a needle core exists in the blood taking process.
The invention is realized by the following technical scheme:
the safety blood taking needle comprises a needle core and a protective cover sleeved outside the needle core, wherein a first clamping part is arranged on the needle core, and a second clamping part is arranged on the protective cover; the first clamping part can be clamped on the second clamping part to realize locking, and the first clamping part can rotate out of the second clamping part to realize unlocking.
In the prior art, a spring or other ejection device is arranged on one type of safety blood taking needle, the components are more, the structure is complex, the production and the assembly of the safety blood taking needle are more complex, and the safety blood taking needle is used as a low-value consumable material and is usually used once, so that the safety blood taking needle has no advantages in mass production and application. The other type of safety blood taking needle only relies on the buckle, the draw-in groove realizes that the protection casing can not slide relative the needle core under the blood sampling state, but in industrial manufacturing, in order to avoid this kind of disposable consumptive material card to die, generally can not set up very big with the block strength between buckle, the draw-in groove, in the transportation, the protection casing also can slide for many times for the needle core, cause buckle and draw-in groove not hard up, the block strength reduces, finally lead to in the blood sampling process, any problem appears in the effort point of staff's gripping, the size of force, the direction of force etc. all probably lead to the relative needle core of protection casing to slide in the blood sampling process, cause blood sampling process interruption, blood sampling difficulty, cause uncomfortable feeling to the patient.
In order to solve the problems, the invention provides a safety blood taking needle with a rotary clamping function.
The safety blood taking needle comprises a needle core and a protective cover, wherein the front end of the needle core is used for installing a steel needle, and the rear end of the needle core is used for connecting a hose. The shield is rotatable and slidable relative to the needle. Under the blood sampling state, the front end of protection casing coincides with the front end of needle core, and the steel needle exposes in order to be used for the blood sampling this moment, and the direction of back to the needle core front end promotes the protection casing after the blood sampling is accomplished for the rear end of protection casing coincides with the front end of needle core, and the steel needle is located the protection casing this moment completely, plays the effect of avoiding the needle to stab, and preferably, after the use was accomplished, the distance that the protection casing was pulled to its front end direction was 30mm.
The invention improves the needle core and the protective cover, so that the needle core and/or the protective cover can be fixed relatively by rotating, thereby preventing the protective cover from moving relative to the needle core in a blood sampling state.
Specifically, be provided with first joint portion on the needle core, be provided with second joint portion on the shield, first joint portion and second joint portion are joint cooperation relation. The first clamping part can be arranged at any position on the needle core, and the second clamping part can be arranged at any position on the protective cover. The needle core and/or the protective cover are/is rotated, so that the needle core rotates relative to the protective cover, and the first clamping part is driven to rotate to the second clamping part, the locking state of the first clamping part on the second clamping part is realized, and the protective cover is fixed relative to the needle core at the moment; when the unlocking is needed, the first clamping part is rotated, so that the first clamping part is rotated out of the second clamping part, and the protective cover can slide relative to the needle core. Preferably, the locking and unlocking are achieved in opposite rotational directions, so as to avoid unlocking caused by continued rotation in the locked state.
When the blood sampling device is used, the front end of the protective cover is overlapped with the front end of the needle core, the needle core is rotated clockwise to enable the first clamping part and the second clamping part to be locked, preferably, the rotation angle is 80-110 degrees, so that the relative fixation of the needle core and the protective cover is realized, blood sampling is started, and the first clamping part and the second clamping part cannot rotate or slide relatively in the blood sampling process. After blood sampling is accomplished, anticlockwise rotation needle core makes first joint portion and second joint portion unblock to realize the relative slip of needle core and protection casing, later slide the protection casing and make the rear end of protection casing and the front end coincidence and the joint of needle core, can protect the steel needle, avoid relevant personnel to be injured by the acupuncture.
Therefore, through the mechanism, the first clamping part and the second clamping part cannot rotate or slide relatively under the locking state, so that the blood collection process cannot be interrupted in advance due to the movement of the protective cover, and the blood collection process is safer; meanwhile, due to the behavior habit of people, people usually exert force towards the direction of the people to be sampled when blood is sampled, so that the protective cover of the traditional blood sampling needle can slide towards the people to be sampled in advance, namely the front end of the protective cover, and the unlocking of the first clamping part and the second clamping part can be realized through the rotating direction, so that the protective cover moves relative to the needle core due to the faults of the action point, the action size and the action direction of the staff is fundamentally avoided in the rotating locking/unlocking step, and after the blood sampling end is confirmed, the protective cover can be unlocked only by two hands, so that the working error rate is greatly reduced; moreover, need not to use devices such as spring when making the blood taking needle, simple structure, the industry quantization production of being convenient for and assembly, manufacturing cost satisfies medical low-consumption material's actual demand to in-process, need not to consider the axial draw-in groove of protection casing and needle core and the cooperation elasticity problem of buckle itself, also need not protection casing and needle core relatively fixed in the transportation, only need rotatory first joint portion and second joint portion to locking state can when using, make this kind of low value consumable material can adapt to fast, efficient medical environment more.
Further, a steel needle positioning table is arranged at the front end of the needle core, and a first clamping part is arranged on the outer wall of the steel needle positioning table; the second clamping part is positioned on the inner wall of the front end of the protective cover. The inside steel needle locating bench that is provided with is used for installing the steel needle locating hole, the steel needle locating hole includes straight section and reducing section, the reducing section is located the one end that the steel needle locating bench kept away from the nook closing member, along the direction of the one end that the steel needle locating bench kept away from the nook closing member to the one end that is close to the nook closing member, the diameter of reducing section increases gradually, and the gluing agent of design's aim at coating in the steel needle locating hole can not get into the cavity region of nook closing member inside through the straight section of steel needle locating hole and cause the pollution. The first clamping part is arranged on the outer wall of the steel needle positioning table and matched with the second clamping part arranged on the inner wall of the front end of the protective cover.
As a preferred embodiment of the first clamping portion and the second clamping portion of the present invention, the first clamping portion includes a first clamping table, and the second clamping portion includes a second clamping table. The first clamping table and the second clamping table are perpendicular to the axial direction of the needle core. Preferably, the first clamping table and the second clamping table are both in a sheet-shaped structure, and further preferably, the areas of the first clamping table and the second clamping table are approximately equal, so that the second clamping table can form good blocking for the first clamping table and is uniformly stressed. When the protective cover is used, the needle core is pushed towards the front end of the protective cover, the steel needle positioning table of the needle core is finally propped against the inner surface of the front end face of the protective cover or other parts on the outer wall of the needle core are propped against the inner wall of the protective cover, so that the needle core cannot continuously move towards the front end, at the moment, the cross section of the first clamping table is positioned between the cross section of the second clamping table and the front end face of the protective cover, but the first clamping table is not contacted with the second clamping table; and then rotating the needle core to enable the first clamping table to be in contact with the second clamping table, wherein the second clamping table prevents the first clamping table from moving towards the rear end of the needle core, so that the needle core cannot move towards the rear end of the needle core, and further, the locking of the first clamping table and the second clamping table and the relative fixation of the needle core and the protective cover are realized. After the needle core and the protective cover are relatively fixed, blood collection can be started. The blood sampling is accomplished, and rotatory needle core to opposite direction for first cassette is not contacted with the second cassette, realizes the unblock of first cassette and second cassette promptly, can easily promote the protection casing after the unblock in order to reach the protection state.
As another preferred embodiment of the first clamping part and the second clamping part, the first clamping part further comprises an anti-rotation clamping protrusion, and the second clamping part further comprises an anti-rotation clamping groove which is matched with the anti-rotation clamping protrusion. The anti-rotation clamping protrusions and the anti-rotation clamping grooves are used for limiting the rotation angle of the needle core and the first clamping table during locking, and further preventing the first clamping table from rotating relative to the second clamping table in a blood sampling state. Preferably, the anti-rotation locking protrusion is perpendicular to the first locking platform, the anti-rotation locking groove is perpendicular to the second locking platform, and the anti-rotation locking protrusion and the anti-rotation locking groove are configured such that the anti-rotation locking protrusion is located in the anti-rotation locking groove when in a locking state, i.e. when the first locking platform is completely rotated onto the second locking platform. When the first clamping table rotates clockwise to the second clamping table to realize locking, the anti-rotation clamping groove can limit the anti-rotation clamping protrusion to rotate continuously, so that the needle core and the first clamping table are prevented from rotating continuously in the clockwise direction, the first clamping table is separated from the second clamping table again to unlock, and the reliability of the locking/unlocking function is further improved.
As a further preferred embodiment of the first and second clamping portions of the present invention, the second clamping portion further includes a limit stop, the limit stop being perpendicular to the axial direction of the needle core, the first clamping stage being capable of passing through an area between the second clamping stage and the limit stop. The limiting baffle is used for limiting the rotation angle of the needle core and the first clamping table during unlocking. That is, the final core, the first detent, is rotatable through an angle between the anti-rotation detent and the limit stop, preferably through 90 °. The limit baffle is perpendicular to the first clamping table, when the anti-clockwise unlocking is carried out, after the first clamping table is completely separated from the second clamping table, the end face of the first clamping table is in contact with the limit baffle, the needle core and the first clamping table are prevented from continuing to rotate along the anti-clockwise direction, and then the first clamping table can pass through the area between the second clamping table and the limit baffle, so that the protective cover can move relative to the needle core.
As a clamping structure in the protection state, the rear end of the protection cover is provided with a second boss and a clamping groove, the outer wall of the needle core is provided with a first boss and a clamping buckle, and the first boss and the clamping buckle are close to the front end of the needle core; wherein, buckle and buckle groove phase-match, first boss and second boss phase-match. After the use is completed, the protective cover is pushed towards the front end of the needle core, and finally, on one hand, the first boss is abutted against the second boss, and the second boss prevents the first boss from moving further towards the rear of the first boss, namely, the protective cover is prevented from moving towards the front end of the needle core; on the other hand, the buckle falls into the clamping groove, and the clamping groove limits the buckle to prevent the protective cover from moving towards the rear end of the needle core. At this time, the protective cover is clamped on the needle core, and the steel needle falls into the protective cover completely to form a protective state.
Further, the number of the second bosses is two, and the two second bosses are symmetrical relative to the buckling groove; the number of the first bosses is two, and the two first bosses are symmetrical with respect to the buckle. Namely, the two second bosses and the clamping groove are arranged along the circumferential direction of the inner wall of the protective cover, meanwhile, the clamping groove is positioned between the two second bosses, and the central angle between the clamping groove and the second bosses is 90 degrees. Similarly, in order to match with the second boss and the buckle groove, the two first bosses and the buckle are arranged along the circumference of the outer wall of the needle core, the buckle is positioned between the two first bosses, and the central angle between the buckle and the first bosses is 90 degrees. The arrangement makes two three clamping points form an isosceles triangle, the clamping structure is more stable, the protective cover is not easy to move relative to the needle core under the protection state, the protective cover can always protect the steel needle inside the blood taking needle after the blood taking needle is used in the later period, and the safety of the blood taking needle in the later period is improved. Preferably, two mutually symmetrical planes are cut on the side surface of the needle core, a first boss is respectively arranged on the two cutting surfaces, and meanwhile, the inner wall of the protective cover is arranged into a diameter-variable section with increased diameter. On the one hand, the needle core is easier to move in the protective cover, and on the other hand, when the rotation of the needle core in the protective cover enables the first boss not to be aligned with the second boss and the buckle not to be aligned with the buckle groove, the reducing section of the inner wall of the protective cover can play a role in limiting the first boss on the cutting surface, the needle core is prevented from moving relative to the protective cover, the function of guiding and aligning is achieved, and the reliability and safety of blood taking needle operation are improved. Further preferably, the outer wall of the upper rear end of the needle core is provided with a needle core reducing section, the diameter of the needle core reducing section is smaller than that of the needle core, and the needle core reducing section is beneficial to the rotation of the needle core in the protective cover when passing through the reducing section of the inner wall of the protective cover.
Further, a hose positioning table is arranged at the rear end of the needle core. The hose positioning holes are arranged in the hose positioning table and used for coating the adhesive and fixing the hose.
Further, the device also comprises a steel needle and a hose, wherein the steel needle is installed in the steel needle positioning table, and the hose is installed in the hose positioning table. The steel needle, the needle core and the hose form a blood sampling passage.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, the first clamping part and the second clamping part cannot rotate or slide relatively under the locking state, so that the blood collection process cannot be interrupted in advance due to the movement of the protective cover, and the blood collection process is safer;
2. because the behavior habit of people usually applies force towards the direction of the person to be sampled when blood is sampled, the protective cover of the traditional blood sampling needle can slide towards the person to be sampled in advance, namely the front end of the protective cover, and the unlocking of the first clamping part and the second clamping part can be realized through the rotating direction, so that the protective cover moves relative to the needle core due to the faults of the action point, the action size and the action direction of a worker is fundamentally avoided in the rotating locking/unlocking step, and after the blood sampling end is confirmed, the protective cover can be unlocked only by two hands, so that the working error rate is greatly reduced;
3. the invention does not need to apply devices such as a spring and the like when manufacturing the blood taking needle, has simple structure, is convenient for industrial quantitative production and assembly, and has the production cost meeting the actual requirement of medical low consumable, and in the manufacturing process, the problem of the matching tightness of the axial clamping grooves of the protective cover and the needle core and the buckle is not needed to be considered, and the protective cover and the needle core are not needed to be relatively fixed in the transportation process, and only the first clamping part and the second clamping part are needed to be rotated to be in a locking state when in use, so that the low-value consumable material can be more suitable for a rapid and efficient medical environment;
4. according to the invention, the rotation angle of the first clamping table is limited through the limiting baffle and the anti-rotation clamping groove, and meanwhile, the locking/unlocking directions are opposite, so that the use method of the blood taking needle is simplified, and the use reliability and safety of the blood taking needle are improved;
5. according to the invention, the clamping structure is more stable by the isosceles triangle clamping point mode of the second boss, the first boss, the clamping buckle and the clamping buckle groove, the protective cover is not easy to move relative to the needle core in the protection state, the protective cover can always protect the steel needle in the post-treatment blood taking needle when the post-treatment blood taking needle is used, and the safety of the post-treatment blood taking needle is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is an exploded assembly view of an embodiment of the present invention;
FIG. 2 is a schematic view of the blood collection device of the present invention;
FIG. 3 is a schematic cross-sectional view showing a blood collection state of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic view of the protection state of the present invention;
FIG. 6 is a cross-sectional view taken along the a-a plane in FIG. 5;
FIG. 7 is a partial enlarged view at B in FIG. 6;
FIG. 8 is a cross-sectional view taken along the b-b plane of FIG. 5;
FIG. 9 is an enlarged view of a portion of FIG. 8 at C;
FIG. 10 is a schematic view of the stylet in a rotationally unlocked state;
FIG. 11 is a schematic view of the structure of the front end of the shield;
FIG. 12 is a schematic view of the structure of the front end of the needle core;
in the drawings, the reference numerals and corresponding part names:
1-steel needle, 2-needle core, 201-first clamping table, 202-anti-rotation clamping protrusion, 203-first boss, 204-buckle, 205-hose positioning table, 206-steel needle positioning table, 207-needle core variable diameter section, 3-protective cover, 301-second clamping table, 302-anti-rotation clamping groove, 303-limit baffle, 304-second boss, 305-buckle groove and 4-hose.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.
Example 1:
the safety blood taking needle as shown in fig. 1 to 12 comprises a needle core 2 and a protective cover 3 sleeved outside the needle core, wherein a first clamping part is arranged on the needle core 2, and a second clamping part is arranged on the protective cover 3; the first clamping part can be clamped on the second clamping part to realize locking, and the first clamping part can rotate out of the second clamping part to realize unlocking; the front end of the needle core 2 is provided with a steel needle positioning table 206, and a first clamping part is arranged on the outer wall of the steel needle positioning table 206; the second clamping part is positioned on the inner wall of the front end of the protective cover 3; the first clamping part comprises a first clamping table 201, and the second clamping part comprises a second clamping table 301; the first clamping table 201 and the second clamping table 301 are perpendicular to the axial direction of the needle core 2.
In the blood collection state, as shown in fig. 3 and 4, the first clamping table 201 is located in front of the second clamping table 301, the second clamping table 301 prevents the first clamping table 201 from moving backward, and meanwhile, the front end of the needle core 2 abuts against the inner wall of the protective cover 3, so that the needle core 2 cannot move continuously to the front end, and the needle core 2 and the protective cover 3 are relatively fixed in the blood collection state. After the worker confirms that blood collection is completed, the needle core 2 is rotated until the first clamping table 201 is completely separated from the second clamping table 301, unlocking of the first clamping table 201 and the second clamping table 301 is achieved, and at the moment, the protective cover 3 can slide and rotate relative to the needle core 2.
Example 2:
on the basis of embodiment 1, the first clamping part further comprises an anti-rotation clamping protrusion 202, the second clamping part further comprises an anti-rotation clamping groove 302, and the anti-rotation clamping groove 302 is matched with the anti-rotation clamping protrusion 202; the second clamping portion further comprises a limit baffle 303, the limit baffle 303 is perpendicular to the axial direction of the needle core 2, and the first clamping table 201 can pass through the area between the second clamping table 301 and the limit baffle 303.
As shown in fig. 10, when unlocking, after the first clamping table 201 rotates to be separated from the second clamping table 301, the first clamping table continues to rotate and finally contacts with the limit baffle 303, and thus unlocking is completed. The first clamping table 201 can then pass through the gap between the second clamping table 301 and the limit baffle 303, so that the protective cover 3 moves towards the front end of the needle core 2.
Example 3:
on the basis of embodiment 1 and embodiment 2, the rear end of the protective cover 3 is provided with a second boss 304 and a buckle groove 305, the outer wall of the needle core 2 is provided with a first boss 203 and a buckle 204, and the first boss 203 and the buckle 204 are both close to the front end of the needle core 2; wherein, the buckle 204 is matched with the buckle groove 305, and the first boss 203 is matched with the second boss 304; the number of the second bosses 304 is two, and the two second bosses 304 are symmetrical with respect to the fastening groove 305; the number of the first bosses 203 is two, and the two first bosses 203 are symmetrical with respect to the buckle 204.
After blood collection is completed and the needle core 2 is unlocked, the protective cover 3 moves towards the front end of the needle core 2, and finally the rear end of the protective cover 3 coincides with the front end of the needle core 2. As shown in fig. 6 and 7, the buckle 204 is locked in the buckle groove 305, and the buckle groove 305 prevents the buckle 204 from moving forward. As shown in fig. 8 and 9, the two first bosses 203 respectively abut against the two second bosses 304, and the second bosses 304 prevent the first bosses 203 from moving rearward. Through above-mentioned isosceles triangle's joint structure for under the protection state, the protection casing 3 is more firm with the fixed of needle core 2, ensures that later stage when handling the blood taking needle after the use, protection casing 3 can protect steel needle 1 in its inside all the time, has improved the security of later stage treatment blood taking needle.
Example 4:
on the basis of the embodiment 1 to the embodiment 3, a hose positioning table 205 is arranged at the rear end of the needle core 2; also included are steel needle 1 and hose 4, steel needle 1 being mounted in steel needle positioning stage 206 and hose 4 being mounted in hose positioning stage 205.
The steel needle positioning hole of the steel needle positioning table 206 is used for installing and positioning the steel needle 1, the funnel-shaped structure at the front end of the steel needle positioning hole is favorable for coating the adhesive, and the adhesive is not easy to enter the straight section of the steel needle positioning hole. The hose 4 is also secured by adhesive within the hose positioning hole in the hose positioning table 205.
The use of "first," "second," etc. (e.g., first detent, second detent, first boss, second boss, etc.) in the present invention is merely for clarity of description to distinguish corresponding components and is not intended to limit any order or emphasize importance, etc. In addition, the term "coupled" as used herein may be directly coupled or indirectly coupled via other components, unless otherwise indicated.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The safe blood taking needle comprises a needle core (2) and a protective cover (3) sleeved outside the needle core (2), and is characterized in that a first clamping part is arranged on the needle core (2), and a second clamping part is arranged on the protective cover (3); the first clamping part can be clamped on the second clamping part to realize locking, and the first clamping part can rotate out of the second clamping part to realize unlocking;
the front end of the needle core (2) is provided with a steel needle positioning table (206), and a first clamping part is arranged on the outer wall of the steel needle positioning table (206); the second clamping part is positioned on the inner wall of the front end of the protective cover (3);
the first clamping part comprises a first clamping table (201), and the second clamping part comprises a second clamping table (301);
the first clamping part further comprises an anti-rotation clamping protrusion (202), the second clamping part further comprises an anti-rotation clamping groove (302), and the anti-rotation clamping groove (302) is matched with the anti-rotation clamping protrusion (202);
the second clamping part further comprises a limit baffle (303), the limit baffle (303) is perpendicular to the axial direction of the needle core (2), and the first clamping table (201) can pass through the area between the second clamping table (301) and the limit baffle (303);
the first clamping part can be rotated to the second clamping part to realize locking, the first clamping table (201) is positioned in front of the second clamping table (301) after locking, the second clamping table prevents the first clamping table from moving backwards, and the front end of the needle core (2) is abutted against the inner wall of the protective cover (3); the first clamping table (201) can be rotated to be completely separated from the second clamping table (301) to unlock, and the protective cover (3) can slide and rotate relative to the needle core (2) after unlocking; the locking and unlocking are realized in opposite rotation directions, and the rotation angle is 80-110 degrees.
2. A safety lancet according to claim 1, wherein the first (201) and second (301) clamping stations are each perpendicular to the axial direction of the needle core (2).
3. The safety lancet according to claim 1, wherein the rear end of the protective cover (3) is provided with a second boss (304) and a buckle groove (305), the outer wall of the needle core (2) is provided with a first boss (203) and a buckle (204), and the first boss (203) and the buckle (204) are both close to the front end of the needle core (2); wherein, buckle (204) and buckle groove (305) phase-match, first boss (203) and second boss (304) phase-match.
4. A safety lancet according to claim 3, wherein the number of the second bosses (304) is two, and the two second bosses (304) are symmetrical with respect to the catch groove (305); the number of the first bosses (203) is two, and the two first bosses (203) are symmetrical relative to the buckle (204).
5. The safety lancet according to any one of claims 1 to 4, wherein a hose positioning table (205) is provided at the rear end of the needle core (2).
6. The safety lancet of claim 5, further comprising a steel needle (1) and a hose (4), wherein the steel needle (1) is mounted in a steel needle positioning stage (206), and the hose (4) is mounted in a hose positioning stage (205).
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CN201810863636.7A CN108852371B (en) | 2018-08-01 | 2018-08-01 | Safety blood taking needle |
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CN201810863636.7A CN108852371B (en) | 2018-08-01 | 2018-08-01 | Safety blood taking needle |
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CN108852371B true CN108852371B (en) | 2024-04-12 |
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WO2003041766A2 (en) * | 2001-11-14 | 2003-05-22 | Sherwood Services Ag | Safety needle apparatus |
FR2922112B1 (en) * | 2007-10-11 | 2009-12-04 | Rexam Pharma La Verpilliere | SAFETY DEVICE FOR A LIQUID INJECTION SYRINGE AND SYRINGE ASSEMBLY COMPRISING SAID DEVICE |
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CN1635919A (en) * | 2001-03-15 | 2005-07-06 | Mdc投资控股公司 | Retractable needle medical device for injecting fluid from a pre-filled cartridge |
CN101657226A (en) * | 2006-09-28 | 2010-02-24 | 摩根医疗科技公司 | Intravenous cannula assembly |
CN102974009A (en) * | 2012-09-28 | 2013-03-20 | 林作钱 | Pin head protective device and safety pin assembly |
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