CN111528864B - Vein blood taking needle with needle point capable of being blocked - Google Patents
Vein blood taking needle with needle point capable of being blocked Download PDFInfo
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- CN111528864B CN111528864B CN202010407776.0A CN202010407776A CN111528864B CN 111528864 B CN111528864 B CN 111528864B CN 202010407776 A CN202010407776 A CN 202010407776A CN 111528864 B CN111528864 B CN 111528864B
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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
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
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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
- 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
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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
- 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
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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
- 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
- A61B5/150633—Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
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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
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Abstract
The invention relates to a vein blood taking needle with a needle tip capable of being blocked, which comprises a blood taking needle, a transparent hose, a tail needle, a front needle holder and a rear needle holder, wherein the front needle holder and the rear needle holder are respectively provided with a front blocking device and a rear blocking device; the front plugging device consists of a front plugging device and a push plate, wherein the front plugging device consists of a cylindrical body, an upper spring piece and a lower spring piece; the upper spring piece and the lower spring piece press one end of the blood taking needle to have a tendency of moving to the other side under the condition that the blood taking needle is not blocked; the front needle cap seat is provided with a slot, and the push plate is connected with the cylinder body through an L-shaped plate positioned in the slot. According to the vein blood taking needle, after the blood taking needle is used, the front and rear occluders are moved, the upper spring piece and the lower spring piece on the occluder can be connected together to block the needle tip, so that the needle tips of the blood taking needle and the tail needle are occluded in the cylindrical body, the situation that the existing blood taking needle stabs medical staff after being used is avoided, and the infection probability of the medical staff is reduced.
Description
Technical Field
The invention relates to a vein blood taking needle with a sealable needle point, in particular to a vein blood taking needle with a sealable needle point.
Background
The skin injury caused by medical sharp instruments such as blood taking needles, syringe needles, puncture needles, scissors and the like is called sharp injury, the sharp injury seriously threatens the life health and safety of medical personnel, and the blood source infection caused by the sharp injury is also gradually serious. Medical staff are high risk groups affected by sharp injuries, and the needle stick injury is the highest rate of sharp injuries. The blood taking needle is one of the most used instruments of medical institutions, a large number of patients can collect blood every day, and after the blood collection is finished, medical workers need to discard the blood taking needle into a sharp instrument box so as to perform centralized processing. However, in the process that the medical care personnel holds the used blood taking needle to walk and discard, the needle point of the blood taking needle and the needle point of the tail needle are exposed, and the accident that the medical care personnel are hurt by the needle points occurs. If the exposed needle tip of the blood taking needle and the exposed needle tip of the tail needle can be blocked, the accident that medical staff are punctured by the needle tips can be avoided, and the spread of blood diseases caused by the accident can be reduced.
Disclosure of Invention
In order to overcome the defects of the technical problems, the invention provides a vein blood taking needle with a needle point capable of being blocked.
The invention relates to a needle point blocking type venous blood taking needle, which comprises a blood taking needle, a transparent hose, a tail needle, a front needle holder and a rear needle holder, wherein the blood taking needle is communicated with the tail needle through the transparent hose; the method is characterized in that: the front needle holder is provided with a front plugging device for plugging the needle tip of the used blood taking needle, and the rear needle holder is provided with a rear plugging device for plugging the needle tip of the used tail needle; the front plugging device consists of a front plugging device and a push plate, the front end of the front needle holder is fixed with a front needle cap seat, the rear end of the front needle cap is sleeved on the front needle cap seat, the front plugging device is positioned at the front end of the front needle cap seat, and the front plugging device consists of a cylindrical body, an upper spring piece and a lower spring piece;
the inner part of the cylindrical body is a cavity, the upper spring piece and the lower spring piece are positioned in the inner cavity of the cylindrical body and are respectively positioned at two sides of the blood taking needle, one ends of the upper spring piece and the lower spring piece are fixedly fixed on the side wall of the cylindrical body, the other ends of the upper spring piece and the lower spring piece are pressed on the blood taking needle, and the upper spring piece and the lower spring piece press one ends of the blood taking needle to have the tendency of moving to one side of the other side under the condition that the blood taking needle is not blocked; a first spherical part is arranged on the blood taking needle close to the needle point, the maximum diameter of the spherical part is larger than that of the blood taking needle, a front through hole and a rear through hole through which the blood taking needle passes are respectively formed in the front wall and the rear wall of the cylindrical body, the diameter of the front through hole is larger than that of the spherical part, and the diameter of the rear through hole is smaller than that of the spherical part; the front needle cap seat is provided with a slot, the push plate is connected with the cylindrical body through an L-shaped plate positioned in the slot, and the L-shaped plate and the slot are in interference fit.
The invention relates to a needle point blocking type venous blood taking needle, wherein an upper spring piece and a lower spring piece are respectively composed of a first arc-shaped part, a second arc-shaped part and a third arc-shaped part which are sequentially connected, the end part of the first arc-shaped part is fixed on the side wall of a cylindrical body, the end part of the third arc-shaped part is pressed against the blood taking needle, and a folding stop block is fixed on the surface of the top end of the third arc-shaped part, which is back to the needle point; when the top of the third arc-shaped part is propped against the blood taking needle, the first arc-shaped part and the third arc-shaped part are bent towards the direction of the needle point.
The invention relates to a needle point blocking type venous blood taking needle, wherein a rear blocking device consists of a rear blocking device, a pulling block and a connecting strip 26, and the structure of the rear blocking device is the same as that of a front blocking device; the rear stopper is positioned at the outer end of the rear needle holder, a tail needle cap seat is fixed at the outer end of the rear stopper, a needle sleeve seat is fixed at the outer end of the tail needle cap seat, the rear end of the tail needle cap is sleeved on the tail needle cap seat, and a rubber needle sleeve is sleeved on the needle sleeve seat; the cylindrical body of the rear plugging device is connected with the rear needle holder through a connecting strip, and welding points respectively connected with the needle holder and the cylindrical body of the rear plugging device are arranged on two sides of the connecting strip;
the tail needle is provided with a second spherical part at a position close to the needle point, the centers of the tail needle cap seat and the needle sleeve seat are provided with a cavity through which the tail needle penetrates and the diameter of which is larger than the maximum diameter of the second spherical part, the rear plugging device is provided with an upper spring piece and a lower spring piece for plugging the needle point of the tail needle, the diameter of a through hole formed in the body wall of the rear plugging device close to the needle point of the tail needle is larger than the maximum diameter of the second spherical part, and the diameter of the through hole formed in the body wall of the needle point of the tail needle is smaller than the maximum diameter of the second spherical part.
The invention relates to a vein blood taking needle with a sealable needle tip, wherein a front needle holder is composed of an outer tube fixed at the periphery of the blood taking needle and a single plate fixed on the outer tube, and the single plate and a push plate on the front needle holder are respectively positioned at two sides of the blood taking needle; the rear needle holder is composed of an outer tube fixed on the tail needle and two plates fixed on the outer tube.
The invention relates to a needle point blocking type venous blood taking needle, wherein a first spherical part and a second spherical part are formed by flattening operation on the blood taking needle and a tail needle.
The beneficial effects of the invention are: the invention relates to a vein blood taking needle with a sealable needle point, which is characterized in that compared with the existing vein blood taking needle, the front end of the vein blood taking needle is provided with a front sealing device consisting of a front sealing device, an L-shaped plate, a push plate, an upper spring leaf and a lower spring leaf.
Similarly, by arranging the rear plugging device formed by the rear plugging device, the pulling block and the connecting strip, after the blood taking needle is used, the connecting strip is disconnected from welding points on the rear needle holder and the rear plugging device by the aid of the handheld pulling block, and then the blood taking needle is continuously pulled towards the needle point direction of the tail needle, so that the second spherical part on the tail needle penetrates out of through holes in the front ends of the needle sleeve seat, the tail needle cap seat and the rear plugging device, and along with continuous outward movement of the rear plugging device, the upper spring piece and the lower spring piece on the rear plugging device are separated from the needle point of the tail needle and are jointed together to plug the needle point of the tail needle, and the rear through hole on the rear plugging device blocks the second spherical part to prevent the second spherical part from penetrating out, so that the rear plugging device realizes wrapping type plugging of the needle point of the tail needle, and the needle point of the tail needle cannot injure medical personnel.
In conclusion, after the blood taking needle is used, the front plugging device and the rear plugging device are respectively moved towards two sides, so that the upper spring piece and the lower spring piece on the plugging devices are jointed together to block the needle point, the needle points of the blood taking needle and the tail needle are plugged in the cylindrical body, the situation that the existing blood taking needle stabs medical staff after being used is avoided, the infection probability of the medical staff is reduced, and the blood taking needle has remarkable beneficial effects.
Drawings
FIG. 1 is a schematic view showing a structure of a conventional intravenous blood collection needle;
FIG. 2 is an enlarged view of a portion of the area A in FIG. 1;
FIG. 3 is a schematic structural view of a needle point blockable type venous blood taking needle of the invention;
FIG. 4 is an enlarged view of a portion of the area D in FIG. 3;
FIG. 5 is an enlarged view of a portion of area E in FIG. 4;
FIG. 6 is an enlarged view of section B-B in FIG. 3;
FIG. 7 is an enlarged view of section C-C of FIG. 3;
FIG. 8 is an enlarged view of a portion of the area F in FIG. 3;
FIG. 9 is a schematic structural view of the front occluder of the present invention occluding the needle tip of the blood collection needle;
FIG. 10 is a schematic structural view of the rear occluder plugging the needle tip of the tail needle in the present invention;
FIG. 11 is a view showing a state of use of the lancet with a needle-point blockable type according to the present invention.
In the figure: 1, a blood taking needle, 2 transparent hoses, 3 tail needles, 4 front needle holders, 5 rear needle holders, 6 front needle caps, 7 rubber needle sleeves, 8 tail needle caps and 9 grooves; the blood sampling device comprises a front plugging device 10, a front needle cap seat 11, a cylindrical body 12, a cavity 13, an upper spring leaf 14, a lower spring leaf 15, a first spherical part 16, a front through hole 17, a slot 18, a 19L-shaped plate, a push plate 20, a first arc part 21, a second arc part 22, a third arc part 23, a folded stop block 24, a rear plugging device 25, a connecting strip 26, a welding point 27, a pulling block 28, a rear needle cap seat 29, a needle sleeve seat 30, a second spherical part 31, a rear through hole 32 and a blood sampling hollow needle 33.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, a schematic structural view of a conventional venous blood collection needle is shown, and fig. 2 is a partial enlarged view of an area a in fig. 1, the conventional venous blood collection needle is composed of a blood collection needle 1, a transparent hose 2, a tail needle 3, a front needle holder 4, a rear needle holder 5, a front needle cap 6, a rubber needle guard 7 and a tail needle cap 8, the blood collection needle 1 is communicated with the tail needle 3 through the transparent hose 2, and the front needle holder 4 is fixed at the rear part of the blood collection needle and is composed of an outer tube positioned on the blood collection needle and a single-piece or double-piece plate fixed on the outer tube, so that the blood collection needle 1 is inserted into a vein of a human body by holding the front needle holder 4 by hand. The rear needle holder 5 is shown fixed to the rear of the tail needle 3 and is composed of an outer tube fixed to the tail needle 3 and a single or double plate fixed to the outer tube so that the rear needle holder 5 can be held by hand to insert the tail needle 3 into the vacuum blood collection tube 33.
The front needle cap 6 is positioned at the periphery of the blood taking needle 1, and the rear end of the front needle cap 6 is inserted on the front needle holder 4 to realize the protection effect on the blood taking needle 1 and avoid the blood taking needle 1 from hurting medical care personnel; when in use, the front needle cap 6 needs to be pulled out. The rubber needle sleeve 7 is wrapped on the periphery of the tail needle 3, and the tail needle 3 is inserted into the negative pressure blood collection tube 33 and wrapped by the rubber needle sleeve 7, so that the tail needle 3 can be prevented from being polluted. The tail needle cap 8 is located the periphery of rubber needle cover 7, and the tail needle cap 8 cover is on back needle holder 5, realizes the guard action to the tail needle, avoids the needle point of tail needle 3 to hinder the people after wearing out from rubber needle cover 7.
For the existing blood taking needle, before the blood taking needle is used, the blood taking needle 1 and the tail needle 3 can be wrapped due to the existence of the front needle cap 6 and the tail needle cap 8, so that the injury of people is avoided; when the blood sampling device is used, the front needle cap 6, the tail needle cap 8 and the rubber needle sleeve 7 need to be pulled out, after blood sampling is finished, the front needle cap 6 and the tail needle cap 8 cannot be sleeved again, because the sleeving is an action with a great risk, if the mode of sleeving again is adopted, the risk that medical staff are punctured is greatly increased.
As shown in fig. 3, a schematic structural view of the vein blood taking needle with a needle point capable of being blocked according to the present invention is given, and a front blocking device and a rear blocking device are respectively arranged on the front needle holder 4 and the rear needle holder 5, so as to block the needle point of the blood taking needle 1 and the needle point of the tail needle 3. As shown in fig. 4 and 5, a partial enlarged view of the area A in fig. 3 and a partial enlarged view of the area E in fig. 4 are respectively given, and fig. 6 and 7 are respectively given an enlarged view of the section B-B and the section C-C in fig. 3, the front anti-blocking device is composed of a front stopper 10, a push plate 20 and an L-shaped plate 19, the front end of the front needle holder 4 is fixed with a front needle cap seat 11, the front needle cap seat 11 is cylindrical, the rear end of the front needle cap 6 is sleeved on the front needle cap seat 11, and when in use, the front needle cap 6 is pulled out from the front needle cap seat 11. The front occluder 10 is composed of a cylindrical body 12, an upper spring piece 14 and a lower spring piece 15, the inside of the cylindrical body 12 is a cavity 13, the upper spring piece 14 and the lower spring piece 15 are both positioned in the cavity 13 and respectively positioned at two ends of the blood taking needle 1, one end parts of the upper spring piece 14 and the lower spring piece 15 are fixed on the side wall of the cylindrical body 12, and the other end parts are pressed on the blood taking needle 1. When the blood taking needle 1 is arranged between the upper spring piece 14 and the lower spring piece 15, the upper spring piece 14 and the lower spring piece 15 are both in a bent state, and when the blood taking needle 1 is removed from the position between the upper spring piece 14 and the lower spring piece 15, the end parts of the upper spring piece 14 and the lower spring piece 15, which are pressed on the blood taking needle 1, are both provided with an impelling moving to the other side so as to realize the plugging of the blood taking needle 1.
The illustrated front needle cap base 11 is provided with a slot 18, and an L-shaped plate 19 is positioned in the slot 18 so as not to influence the insertion of the front needle cap 6 on the front needle cap base 11. The front end of the L-shaped plate 19 is fixed with the cylindrical body 12, and the part of the L-shaped plate 19 penetrating through the slot 18 is fixedly connected with the push plate 20. The L-shaped plate 19 is in interference fit with the slot 18, and the L-shaped plate 19 can be pushed out of the slot 18 only when the push plate 20 is pushed by force. The front end face and the rear end face of the cylindrical body 12 are respectively provided with a front through hole 17 and a rear through hole 32, the blood taking needle 1 penetrates out of the front through hole 17 and the rear through hole 32, a first spherical part 16 is arranged at a position, close to a needle point, on the blood taking needle 1, the first spherical part 16 can be formed in a pressing mode, and the aperture of the front through hole 17 is larger than the maximum diameter of the first spherical part 16, so that the first spherical part 16 can penetrate out of the front through hole 17. The aperture of the rear through hole 32 is smaller than the maximum diameter of the first spherical part 16 so that the rear through hole 32 achieves a blockage of the first spherical part 16.
As a specific structural form, the upper spring plate 14 and the lower spring plate 15 are composed of a first arc-shaped portion 21, a second arc-shaped portion 22 and a third arc-shaped portion 23 which are connected in sequence, the end portion of the first arc-shaped portion 21 is fixed on the side wall of the cylindrical body 12, the included angle between the first arc-shaped portion 21 and the second arc-shaped portion 22 and the included angle between the second arc-shaped portion 22 and the third arc-shaped portion 23 are all obtuse angles, a folding stop block 24 is arranged on the face of the third arc-shaped portion 23, which faces away from the needle point, and the folding stop block 24 can be formed in a manner that the end portion of the third arc-shaped portion 23 is folded. When the blood taking needle 1 is removed, the stop block 24 can realize the blocking and limiting functions of the upper spring leaf 14 or the lower spring leaf 15. When the blood collection needle 1 is present between the upper spring plate 14 and the lower spring plate 15, the first arc-shaped part 21 and the third arc-shaped part 23 are both in a bent state, so that the ends of the upper spring plate 14 or the lower spring plate 15 can be handed over together after the blood collection needle 1 is removed.
As shown in fig. 9, which shows a schematic structural diagram of the front occluder of the present invention when occluding the needle tip of the blood taking needle, after use, one hand holds the front needle holder 4, the other hand pushes the plate 20 towards the needle tip of the blood taking needle 1, the l-shaped plate 19 moves out of the slot 18, as the cylindrical body 12 moves towards the needle tip of the blood taking needle 1, the first spherical part 16 on the blood taking needle 1 first passes through the front through hole 17, then the needle tip of the blood taking needle 1 moves out from between the upper spring leaf 14 and the lower spring leaf 15, after the blood taking needle 1 moves out, the lower ends of the upper spring leaf 14 and the lower spring leaf 15 move towards each other and are jointed together; as the cylindrical body 12 moves continuously, the rear through hole 32 in the cylindrical body 12 blocks the first spherical part 16; in this way, the needle tip of the blood taking needle 1 is blocked in the cylindrical body 12 by the upper spring piece 14 and the lower spring piece 15 which limit and connect the first spherical part 16 through the rear through hole 32 and the needle tip of the blood taking needle 1 is blocked, and the accident that the needle tip of the blood taking needle 1 hurts people is avoided.
As shown in fig. 8, which shows a partial enlarged view of the region F in fig. 3, the rear occlusion device shown is composed of a rear occlusion device 25, a connecting strip 26 and a pulling block 28, the rear occlusion device 25 is located at the outer end of the rear needle holder 5, and the structure of the rear occlusion device 5 is the same as that of the front occlusion device 10. The outer end of the rear plugging device 5 is fixed with a tail needle cap seat 29, the outer end of the tail needle cap seat 29 is fixed with a needle sleeve seat 20, the rubber needle sleeve 7 is fixed on the needle sleeve seat 30, the tail needle cap 8 is sleeved on the tail needle cap seat 29, and when the device is used, the rubber needle sleeve 7 and the tail needle cap 8 are pulled out, so that the tail needle 3 can be exposed so as to be inserted into the negative pressure blood sampling tube 33.
The tail needle 3 is provided with a second spherical part 31 at a position close to the needle tip, the diameter of the second spherical part 31 is larger than that of other parts of the tail needle 3, and the second spherical part 31 can be formed by adopting a pressing method. The centers of the tail needle cap seat 29 and the needle sleeve seat 30 are both provided with through holes through which tail needles pass, and the size of the through holes is larger than the maximum diameter of the second spherical part 31. So that the second spherical portion 31 on the trailing needle 3 can pass through the through holes of the trailing needle cap mount 29 and the needle hub mount 30. The cylindrical body 12 of the rear occluder 25 is shown connected to the rear needle holder 5 via a connecting strip 26 in the following way: both sides of connecting strip 26 all are provided with a plurality of welding points 27 that are connected with cylindricality 12 and back needle holder 5 respectively, and the joint strength of welding point 27 should satisfy, when pulling out rubber needle cover 7 and tail needle cap 8, can not destroy welding point 27, only when holding between the fingers pull piece 28 and tear connecting strip 26, just can break away from back plugging device 25 and back needle holder 5 and come.
As shown in fig. 10, which shows a schematic structural diagram of the rear stopper of the present invention when the needle tip of the tail needle is blocked, after the vein blood taking needle is used, the blood taking needle 1 is blocked, then the rear needle holder 5 is held by one hand, the pull block 28 is held by the other hand, the welding point 27 on the connecting strip 26 is torn off from the rear stopper 25 and the rear needle holder 5, then the rear stopper 25 is continuously pulled to move towards the needle tip of the tail needle 3, the second spherical portion 31 on the tail needle 3 sequentially penetrates through the needle hub 30 and the through hole on the needle cap hub 29, and then penetrates through the through hole on the rear stopper 25 near one side of the tail needle 3, and along with the continuous movement of the rear stopper 25, when the tail needle 3 moves out from between the upper spring leaf 14 and the lower spring leaf 15 on the rear stopper 25, the tail end of the upper spring leaf 14 and the tail end of the lower spring leaf 15 are jointed together, so as to block the needle tip of the tail needle 3; at the same time, the through hole provided on the left side of the rear stopper 25 blocks the second spherical portion 31, so that the needle tip of the tail needle 3 is blocked in the rear stopper 25.
As shown in figure 11, the using state diagram of the vein blood taking needle with a needle point capable of being blocked of the invention is given, when in use, the front needle cap 6 is firstly pulled out, and the blood taking needle 1 is inserted into the vein of a patient; then the rubber needle sleeve 7 and the needle cap 8 are pulled out, and the tail needle 3 is inserted into the negative pressure blood collection tube 33 to realize the collection of the venous blood of the patient; after blood collection is finished, the needle tip of the blood taking needle 1 is blocked by pushing the push plate 20 and utilizing the front blocking device 10, then the needle tip of the tail needle 3 is blocked by pulling the pull block 28 and utilizing the rear blocking device 25, and the accident that the blood taking needle hurts people is effectively avoided.
Claims (3)
1. A vein blood taking needle with a sealable needle tip comprises a blood taking needle (1), a transparent hose (2), a tail needle (3), a front needle holder (4) and a rear needle holder (5), wherein the blood taking needle is communicated with the tail needle through the transparent hose, the front needle holder and the rear needle holder are respectively fixed at the rear parts of the blood taking needle and the tail needle, a front needle cap (6) capable of being pulled out is arranged at the periphery of the blood taking needle, a rubber needle sleeve (7) capable of being pulled out is wrapped at the periphery of the tail needle, and a tail needle cap (8) capable of being pulled out is arranged at the periphery of the rubber needle sleeve; the method is characterized in that: the front end of the front needle holder is provided with a front plugging device for plugging the needle tip of the blood taking needle after use, and the rear end of the rear needle holder is provided with a rear plugging device for plugging the needle tip of the tail needle after use; the front plugging device consists of a front plugging device (10) and a push plate (20), the front end of the front needle holder is fixed with a front needle cap seat (11), the rear end of the front needle cap is sleeved on the front needle cap seat, the front plugging device (10) is positioned at the front end of the front needle cap seat, and the front plugging device consists of a cylindrical body (12), an upper spring piece (14) and a lower spring piece (15);
the inside of the cylindrical body (12) is a cavity (13), the upper spring piece and the lower spring piece are positioned in the inner cavity of the cylindrical body and are respectively positioned at two sides of the blood taking needle, one end of the upper spring piece and one end of the lower spring piece are fixed on the side wall of the cylindrical body, the other end of the upper spring piece and the other end of the lower spring piece are pressed towards the blood taking needle, and the upper spring piece and the lower spring piece press towards one end of the blood taking needle and have the tendency of moving to one side of the other side under the condition that the blood taking needle is not blocked; a first spherical part (16) is arranged on the blood taking needle close to the needle point, the maximum diameter of the spherical part is larger than that of the blood taking needle, a front through hole (17) and a rear through hole (32) through which the blood taking needle passes are respectively formed in the front wall and the rear wall of the cylindrical body, the diameter of the front through hole is larger than that of the spherical part, and the diameter of the rear through hole is smaller than that of the spherical part; a notch (18) is formed in the front needle cap seat, the push plate is connected with the cylindrical body through an L-shaped plate (19) in the notch, and the L-shaped plate is in interference fit with the notch;
the upper spring piece (14) and the lower spring piece (15) are respectively composed of a first arc-shaped part (21), a second arc-shaped part (22) and a third arc-shaped part (23) which are sequentially connected, the end part of the first arc-shaped part is fixed on the side wall of the cylindrical body (12), the end part of the third arc-shaped part is abutted against the blood taking needle (1), and a folding stop block (24) is fixed on the surface of the top end of the third arc-shaped part, which is back to the needle point; when the top of the third arc-shaped part is pressed against the blood taking needle, the first arc-shaped part and the third arc-shaped part are bent towards the direction of the needle point;
the rear plugging device consists of a rear plugging device (25), a pulling block (28) and a connecting strip (26), and the structure of the rear plugging device is the same as that of the front plugging device (10); the rear stopper is positioned at the outer end of the rear needle holder (5), a tail needle cap seat (29) is fixed at the outer end of the rear stopper, a needle sleeve seat (30) is fixed at the outer end of the tail needle cap seat, the rear end of the tail needle cap (8) is sleeved on the tail needle cap seat, and a rubber needle sleeve is sleeved on the needle sleeve seat; the cylindrical body of the rear plugging device is connected with a rear needle holder through a connecting strip, and welding points (27) respectively connected with the needle holder and the cylindrical body of the rear plugging device are arranged on two sides of the connecting strip;
the tail needle is characterized in that a second spherical part (31) is arranged at a position, close to the needle point, of the tail needle (3), a cavity, through which the tail needle penetrates and of which the diameter is larger than the maximum diameter of the second spherical part, is formed in the centers of the tail needle cap seat and the needle sleeve seat, an upper spring piece (14) and a lower spring piece (15) for plugging the needle point of the tail needle are arranged on the rear plugging device, the diameter of a through hole formed in the body wall, close to the needle point of the tail needle, of the rear plugging device is larger than the maximum diameter of the second spherical part, and the diameter of a through hole formed in the body wall of the needle point of the tail needle is smaller than the maximum diameter of the second spherical part.
2. The needle-tip-blockable venous blood collection needle according to claim 1, characterized in that: the front needle holder (4) is composed of an outer tube fixed on the periphery of the blood taking needle (1) and a single plate fixed on the outer tube, and the single plate and the push plate (20) on the front needle holder are respectively positioned on two sides of the blood taking needle (1); the rear needle holder (5) is composed of an outer tube fixed on the tail needle (3) and two plates fixed on the outer tube.
3. The needle-tip-blockable venous blood collection needle according to claim 1, characterized in that: the first spherical portion (16) and the second spherical portion (31) are formed by a flattening operation on the lancet (1) and the tail needle (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010407776.0A CN111528864B (en) | 2020-05-14 | 2020-05-14 | Vein blood taking needle with needle point capable of being blocked |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010407776.0A CN111528864B (en) | 2020-05-14 | 2020-05-14 | Vein blood taking needle with needle point capable of being blocked |
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| Publication Number | Publication Date |
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| CN111528864A CN111528864A (en) | 2020-08-14 |
| CN111528864B true CN111528864B (en) | 2023-02-03 |
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| CN202010407776.0A Active CN111528864B (en) | 2020-05-14 | 2020-05-14 | Vein blood taking needle with needle point capable of being blocked |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112220991B (en) * | 2020-10-16 | 2023-01-31 | 临沂市中心医院(临沂市沂水中心医院) | Medical needle head with puncture-proof structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6224576B1 (en) * | 1999-11-04 | 2001-05-01 | Specialized Health Products, Inc. | Safety device for a needle having two sharpened ends |
| WO2014063347A1 (en) * | 2012-10-26 | 2014-05-01 | Zhang Jianming | Automatic needle withdrawing integral vacuum blood sampling apparatus with needle tip protective sleeve |
| CN104856703A (en) * | 2015-05-12 | 2015-08-26 | 黄彦召 | Rapid blood glucose monitoring needle |
| CN106691464B (en) * | 2016-12-30 | 2023-06-13 | 河南曙光汇知康生物科技股份有限公司 | Needling prevention device and blood taking needle manufactured by same |
| CN108937962A (en) * | 2018-07-31 | 2018-12-07 | 四川普瑞斯生物科技有限公司 | A kind of disposable safety type blood-taking needle |
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