CN110840465B - Automatic retraction blood taking needle - Google Patents
Automatic retraction blood taking needle Download PDFInfo
- Publication number
- CN110840465B CN110840465B CN201911208733.3A CN201911208733A CN110840465B CN 110840465 B CN110840465 B CN 110840465B CN 201911208733 A CN201911208733 A CN 201911208733A CN 110840465 B CN110840465 B CN 110840465B
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- sliding
- sliding block
- steel needle
- blood
- clamping seat
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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
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
- A61B5/154—Devices using pre-evacuated means
-
- 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
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- 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)
Abstract
The invention relates to the field of medical instruments, in particular to an automatic retraction blood taking needle. The blood-feeding device comprises a clamping seat, wherein a containing cavity is formed in the clamping seat, a steel needle is arranged in the containing cavity and is connected with a sliding block in a sliding mode, a blood-feeding blood; a push rod is arranged in the accommodating cavity, the push rod penetrates through the side wall of the accommodating cavity, and an inclined plane is arranged on the side wall of the sliding block; the steel needle overcoat is equipped with the flexible cover, and the flexible cover both ends respectively with the slider with hold the intracavity wall and fix, the flexible cover is equipped with the pressure spring outward, the pressure spring both ends are fixed respectively on the slider with hold the intracavity wall. The needle point of the blood taking needle can automatically retract after being used, so that medical staff are prevented from being punctured.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an automatic retraction blood taking needle.
Background
When the existing blood taking needle is used, the tip end of the blood taking needle needs to pierce into a blood vessel, and during blood taking, blood flows into the vacuum blood taking tube from the blood taking needle. When blood collection is finished and the blood taking needle is pulled out of the blood vessel, the tip end of the blood taking needle is still exposed outside, when medical workers discard and recover medical waste, the medical workers are easily stabbed by the tip end when carelessly touching the needle tip of the blood taking needle, the blood of a patient still remains on the used blood taking needle, the blood is easily infected by viruses in the blood after being stabbed by the used blood taking needle, and the safety is poor.
Disclosure of Invention
The invention aims to provide a blood taking needle with a needle tip capable of automatically retracting after use so as to prevent the needle tip from stabbing medical staff.
In order to achieve the purpose, the technical scheme of the invention is as follows: an automatic retraction blood taking needle comprises a clamping seat, wherein a containing cavity is formed in the clamping seat, a steel needle is arranged in the containing cavity along the length direction of the clamping seat and is connected with a sliding block in a sliding mode, the steel needle is fixed with the sliding block, a blood inlet channel communicated with the steel needle is formed in the sliding block, a guide rod is fixed at one end, away from the steel needle, of the sliding block, one end, away from the steel needle, of the guide rod penetrates through the clamping seat and is connected with the clamping seat in a sliding mode, a connecting channel communicated with the blood inlet channel is formed in the guide rod, a sliding-out opening with the diameter larger than the outer diameter of the steel needle is formed in one end, away from the sliding block, of the clamping seat, a sealing sheet for sealing the sliding-out opening is fixed on the clamping seat, and the strength of the sealing sheet is smaller than that of the steel needle; a push rod perpendicular to the sliding direction of the sliding block is arranged in the accommodating cavity, one end, far away from the sliding block, of the push rod penetrates through the side wall of the accommodating cavity and is in sliding connection with the side wall of the accommodating cavity, an inclined surface abutting against the push rod is arranged on the side wall of the sliding block, and the inclined surface is obliquely arranged, wherein the distance between one end, close to the sliding-out opening, of the inclined surface and the blood inlet channel is larger than the distance between one end, far away from the sliding-out opening, of the inclined surface and the blood inlet channel; the steel needle overcoat is equipped with annular flexible cover, and flexible cover both ends respectively with the slider with hold the intracavity wall and fix, the flexible cover is equipped with the pressure spring outward, the pressure spring both ends are fixed respectively on the slider with hold the intracavity wall.
The beneficial effect of this scheme does:
1. after the blood taking needle in this scheme was used and is accomplished, the slider slides to holding the intracavity under the effect of pressure spring, drives the steel needle and slides in and hold the chamber to avoid the pointed end of steel needle to expose outside the cassette, avoid pointed end to stab medical staff and retrieve personnel.
2. The processing method of pressure spring is different with the method of cassette, and the steel needle overcoat in this scheme establishes the flexible cover and plays the separated effect to steel needle and pressure spring, avoids causing the pollution to the steel needle because of the pressure spring disinfection is incomplete, makes the patient infect when the steel needle pierces the patient internal.
Furthermore, one end of the push rod facing the sliding block is a spherical surface.
The beneficial effect of this scheme does: in the sliding process of the sliding block, the contact position of the end part of the push rod and the sliding block is changed, and when the end part of the push rod is a spherical surface, the contact between the sliding block and the lateral edge of the push rod can be avoided, so that the deformation of the push rod towards one end of the sliding block is avoided.
Further, the push rod comprises a sphere and a rod body which are fixedly connected, the sphere is abutted to the inclined plane, the rod body is connected with the side wall of the accommodating cavity in a sliding mode, and the diameter of the sphere is larger than that of the rod body.
The beneficial effect of this scheme does: the diameter of the ball body is larger than that of the rod body, so that the ball body can be prevented from sliding out of the accommodating cavity, and the rod body is prevented from falling off from the clamping seat.
Furthermore, the inclined plane is provided with a guide groove which is abutted against the ball body, and the section of the guide groove is in an arc shape which is attached to the surface of the ball body.
The beneficial effect of this scheme does: the contact area of the guide groove and the ball body is larger, and deformation of the inclined plane and the ball body under the action of pressure is avoided.
Furthermore, the clamping seat is provided with a containing groove at one end far away from the sliding-out opening, and the guide rod is located in the containing groove at one end far away from the sliding block.
The beneficial effect of this scheme does: during the use, the vacuum test tube can with the holding tank joint to make cassette and vacuum test tube connected, and need not artifical handheld vacuum test tube again, reduce the use degree of difficulty.
Furthermore, the clamping seat is far away from one end of the sliding-out opening and is detachably connected with a cover body, and the cover body seals the accommodating groove.
The beneficial effect of this scheme does: the opening and the roll-off mouth of lid and gasket to the holding tank are sealed respectively to avoid holding the steel needle of intracavity and receive external pollution.
Furthermore, a piston is connected in the connecting channel in a sliding mode, a pull rod is fixed to one end, far away from the steel needle, of the piston, and one end, far away from the piston, of the pull rod is located outside the connecting channel.
The beneficial effect of this scheme does: the piston can be quickly slid out through the pull rod, so that the blood inlet channel can be quickly communicated with the vacuum blood collection tube.
Further, can dismantle in the holding tank and be connected with vacuum heparin tube, heparin tube is equipped with the connector towards the one end of piston, the guide bar is kept away from piston one end and is stretched into in the heparin tube from the connector.
The beneficial effect of this scheme does: when in use, the vacuum blood collection tube can be directly used without connecting an external vacuum blood collection tube with the clamping seat, thereby further simplifying the use method of medical personnel.
Furthermore, a clamping block is detachably connected to the clamping seat and clamped with the connecting port.
The beneficial effect of this scheme does: after the blood sampling is finished, the connector can be quickly sealed by taking out the clamping block, and the blood sample in the blood sampling tube is prevented from being leaked.
Further, be equipped with the draw-in groove on the lateral wall that holding tank and heparin tube are relative, the fixture block is located the draw-in groove.
The beneficial effect of this scheme does: when the clamping block is not used, the clamping block is positioned in the clamping groove and cannot be polluted by the outside; after the blood sampling is finished, the blood sampling tube needs to be taken down for storage, and when the blood sampling tube is taken down, the clamping block is exposed, so that the blood sampling tube is more convenient to take out.
Drawings
FIG. 1 is a front longitudinal sectional view of example 1 of the present invention;
FIG. 2 is a schematic view of the needle of FIG. 1 in a completely slid-out state;
FIG. 3 is a front longitudinal sectional view of embodiment 2 of the present invention;
FIG. 4 is a schematic view of the steel pin of FIG. 3 in a partially slid-out state;
fig. 5 is a schematic view showing a state in which the steel needle of fig. 4 is completely slid out.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the blood collection device comprises a clamping seat 1, a containing cavity 11, a flexible sleeve 12, a pressure spring 13, a sealing sheet 14, a rod body 15, a ball 16, a cover body 17, a sliding block 2, a guide groove 21, a blood inlet channel 22, a guide rod 23, a connecting channel 24, a piston 25, a pull rod 26, a steel needle 3, a vacuum blood collection tube 4, a blood collection tube 5, a sealing ring 51 and a clamping block 52.
Example 1
The utility model provides an automatic retraction blood taking needle, as shown in figure 1 and figure 2, including cassette 1, slider 2, steel needle 3 and push rod, be equipped with in the cassette 1 and hold chamber 11, steel needle 3 sets up along 1 length direction of cassette, slider 2 is along the length direction sliding seal who holds chamber 11, 3 left ends of steel needle are most advanced, be equipped with into blood passageway 22 in the slider 2, and the diameter of advancing blood passageway 22 equals the external diameter of 3 right-hand members of steel needle, 3 right-hand members of steel needle are located into blood passageway 22 left ends, and splice with advancing blood passageway 22 left end, steel needle 3 and the intercommunication of advancing blood passageway 22. The right end of the slide block 2 is integrally provided with a guide rod 23.
A connecting channel 24 is arranged in the guide rod 23 along the axial direction of the guide rod 23, and a piston 25 is sealed in the connecting channel 24 in a sliding way; the right-hand member of cassette 1 is equipped with the holding tank that the opening went right, and guide bar 23 right-hand member runs through the holding tank left side wall and lies in the holding tank, and the length that guide bar 23 lies in the holding tank is greater than 2 gliding lengths left of slider to make guide bar 23 can continuously play the guide effect. 1 right-hand member threaded connection of cassette has lid 17, lid 17 seals the opening of holding tank, 1 left end of cassette is equipped with the smooth export relative with steel needle 3, the aperture of smooth export is greater than the external diameter of steel needle 3, 1 right-hand member of cassette is glued and is had gasket 14, gasket 14 in this embodiment adopts medical rubber material, gasket 14 seals smooth export, avoid holding tank inner chamber and steel needle 3 to be contaminated by external germ, sliding seal has piston 25 in the guide bar 23, be used for sealing connecting channel 24, avoid blood to reveal from connecting channel 24 right-hand member, piston 25 right side wall integrated into one piece has pull rod 26, pull rod 26 right-hand member stretches out connecting channel 24 from connecting channel 24 right-hand member.
3 overcoat of steel needle is equipped with annular flexible cover 12, and both ends splice respectively with holding chamber 11 left wall and slider 2 left wall about flexible cover 12, and flexible cover 12 is equipped with pressure spring 13 outward, and pressure spring 13 both ends splice respectively with holding chamber 11 left wall and slider 2 left wall.
The top of slider 2 is equipped with the inclined plane, and the inclined plane is the slope form of height from left to right low, and the inclined plane top is equipped with the push rod, the slip direction of push rod perpendicular to slider 2, the push rod including the body of rod 15 of vertical setting and with body of rod 15 lower extreme integrated into one piece's spheroid 16, the diameter of spheroid 16 is greater than the diameter of the body of rod 15, the vertical lateral wall that holds chamber 11 that runs through of the body of rod 15 to can hold chamber 11 lateral wall relatively and slide. The inclined plane is provided with a guide groove 21 extending from left to right, the guide groove 21 is arc-shaped and is attached to the outer wall of the sphere 16, the lower end of the sphere 16 is attached to the guide groove 21, the sphere 16 is in surface contact with the guide groove 21, and the sphere 16 and the guide groove 21 are prevented from deforming under the action of pressure.
The specific implementation process of this embodiment is as follows:
when the blood vessel puncture sealing device is used, the clamping seat 1 is manually held, the rod body 15 is pushed into the accommodating cavity 11, the ball 16 slides relative to the guide groove 21, the sliding block 2 is pushed leftwards, so that the steel needle 3 slides outwards from the accommodating cavity 11, the sealing sheet 14 is punctured by the steel needle 3 in the sliding process and slides outwards from the clamping seat 1, so that the steel needle 3 can puncture a blood vessel, and the pressure spring 13 is compressed at the moment.
After the steel needle 3 pierces the human body, keep the body of rod 15 to holding the posture that promotes in the chamber 11, the manual work takes off lid 17 and piston 25 to in going into the holding tank with vacuum blood collection tube 4 card that uses at present, guide bar 23 stretches into vacuum blood collection tube 4, blood in the blood vessel flows into vacuum blood collection tube 4 in through steel needle 3, blood inlet channel 22 and connecting channel 24 from the blood vessel under vacuum blood collection tube 4's negative pressure effect.
After the blood sampling is accomplished, the manual work loosens the body of rod 15, and slider 2 slides to the right under the effect of pressure spring 13, and the body of rod 15 slides outside to holding chamber 11 simultaneously, and steel needle 3 slides into to hold chamber 11 in to the right, avoids stabbing medical personnel and recovery personnel. Then the vacuum blood collection tube 4 is taken down to finish blood collection.
Example 2
In addition to embodiment 1, as shown in fig. 3, 4 and 5, in this embodiment, a vacuum blood collection tube 5 is provided in the holding tank, the diameter of the outer wall of the blood collection tube 5 is slightly smaller than the diameter of the holding tank, a connection port is provided at the left end of the blood collection tube 5, the right end of the guide rod 23 extends into the blood collection tube 5 from the connection port, an annular seal ring 51 is sleeved on the outer periphery of the guide rod 23, and the seal ring 51 is bonded to the connection port to seal the gap between the guide rod 23 and the connection port. The right end of the pull rod 26 is glued to the right wall of the blood collection tube 5, and the piston 25 in this embodiment is located on the right side of the connection port. The clamping groove with the rightward opening is formed in the left wall of the accommodating groove, the clamping block 52 is arranged in the clamping groove, the clamping block 52 in the embodiment is a medical rubber plug, the diameter of the clamping block 52 is slightly larger than the aperture of the connecting port and the diameter of the clamping groove, and the clamping block 52 slightly deforms when sliding into the connecting port, so that the clamping block is not prone to falling out of the connecting port.
When the blood taking needle in the embodiment is used for taking blood, in the process of sliding out the steel needle 3, the rod body 15 stops being pushed inwards before the piston 25 slides to the right side of the guide rod 23, then the steel needle 3 penetrates into a blood vessel, the rod body 15 continues to be pushed inwards until the piston 25 slides to the right side of the guide rod 23, at the moment, the connecting channel 24 is communicated with the blood taking tube 5, blood in the blood vessel enters the blood taking tube 5 under the action of negative pressure in the blood taking tube 5, and the vacuum blood taking tube 4 does not need to be additionally installed. When the blood sampling is completed, the rod body 15 is loosened, the cover body 17 is taken down, the blood sampling tube 5 and the fixture block 52 are taken down after the clamping base 1 is rotated to the vertical state, the fixture block 52 slides into the connector to seal the connector, and therefore blood is prevented from leaking from the connector.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these should be construed as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.
Claims (6)
1. An automatic retraction blood taking needle is characterized in that: the blood transfusion device comprises a clamping seat, wherein a containing cavity is arranged in the clamping seat, a steel needle is arranged in the containing cavity along the length direction of the clamping seat and is connected with a sliding block in a sliding manner, the steel needle is fixed with the sliding block, a blood inlet channel communicated with the steel needle is arranged in the sliding block, a guide rod is fixed at one end, away from the steel needle, of the sliding block, one end, away from the steel needle, of the guide rod penetrates through the clamping seat and is connected with the clamping seat in a sliding manner, a connecting channel communicated with the blood inlet channel is arranged in the guide rod, a sliding-out opening with the diameter larger than the outer diameter of the steel needle is arranged at one end, away from the sliding block, of the clamping seat, a sealing sheet for sealing the sliding-out opening is fixed on the clamping seat, and the strength of the sealing sheet is smaller than that of the steel needle; a push rod perpendicular to the sliding direction of the sliding block is arranged in the accommodating cavity, one end, far away from the sliding block, of the push rod penetrates through the side wall of the accommodating cavity and is in sliding connection with the side wall of the accommodating cavity, an inclined surface abutting against the push rod is arranged on the side wall of the sliding block, and the inclined surface is obliquely arranged in a manner that the distance between one end, close to the sliding-out opening, of the inclined surface and the blood inlet channel is larger than the distance between one end, far away from the sliding-out opening, of the inclined surface and the blood inlet channel; the steel needle is sleeved with an annular flexible sleeve, two ends of the flexible sleeve are respectively fixed with the sliding block and the inner wall of the accommodating cavity, a pressure spring is arranged outside the flexible sleeve, and two ends of the pressure spring are respectively fixed on the sliding block and the inner wall of the accommodating cavity;
an accommodating groove is formed in one end, far away from the sliding-out opening, of the clamping seat, and one end, far away from the sliding block, of the guide rod is located in the accommodating groove; one end of the clamping seat, which is far away from the sliding outlet, is detachably connected with a cover body, and the cover body seals the accommodating groove; a piston is connected in the connecting channel in a sliding manner, a pull rod is fixed at one end of the piston, which is far away from the steel needle, and one end of the pull rod, which is far away from the piston, is positioned outside the connecting channel; can dismantle in the holding tank and be connected with vacuum heparin tube, heparin tube is equipped with the connector towards the one end of piston, piston one end is kept away from to the guide bar stretches into in the heparin tube from the connector.
2. The self-retracting lancet of claim 1, wherein: one end of the push rod facing the sliding block is a spherical surface.
3. The self-retracting lancet according to claim 2, wherein: the push rod comprises a sphere and a rod body which are fixedly connected, the sphere is abutted to the inclined plane, the rod body is connected with the side wall of the accommodating cavity in a sliding mode, and the diameter of the sphere is larger than that of the rod body.
4. The self-retracting lancet of claim 3, wherein: the inclined plane is provided with a guide groove which is abutted against the ball body, and the section of the guide groove is in an arc shape which is attached to the surface of the ball body.
5. The self-retracting lancet of claim 1, wherein: the clamping seat is detachably connected with a clamping block, and the clamping block is clamped with the connecting port.
6. The self-retracting lancet of claim 5, wherein: be equipped with the draw-in groove on the lateral wall that holding tank and heparin tube are relative, the fixture block is located the draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911208733.3A CN110840465B (en) | 2019-11-30 | 2019-11-30 | Automatic retraction blood taking needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911208733.3A CN110840465B (en) | 2019-11-30 | 2019-11-30 | Automatic retraction blood taking needle |
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| Publication Number | Publication Date |
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| CN110840465A CN110840465A (en) | 2020-02-28 |
| CN110840465B true CN110840465B (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911208733.3A Active CN110840465B (en) | 2019-11-30 | 2019-11-30 | Automatic retraction blood taking needle |
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| CN107929927A (en) * | 2017-12-16 | 2018-04-20 | 嘉兴新博信息科技有限公司 | A kind of quick comfortable anorectal surgical drug delivery device |
| CN208769793U (en) * | 2018-04-02 | 2019-04-23 | 胡蓉 | A kind of automatic retracted blood taking needle |
| WO2019203496A1 (en) * | 2018-04-17 | 2019-10-24 | 최민기 | Blood lancet device |
| CN208892604U (en) * | 2018-06-05 | 2019-05-24 | 合肥市第二人民医院 | A kind of Anti-stabbing blood taking needle |
| CN209285526U (en) * | 2018-06-13 | 2019-08-23 | 河南省中秀医疗器械有限公司 | New intravenous blood collecting equipment |
| CN208468646U (en) * | 2018-06-25 | 2019-02-05 | 何有明 | A kind of fluting apparatus for suit doors doorjamb |
| CN109999279A (en) * | 2019-05-05 | 2019-07-12 | 河南省中医院（河南中医药大学第二附属医院） | Needle inserting device for anesthesia department |
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