CN216535299U - Hepatitis B inspection blood collection system - Google Patents

Abstract

The utility model discloses a hepatitis B examination blood sample collecting device, which comprises a collecting cylinder, an absorption assembly, a hose and a control assembly, wherein the collecting cylinder is arranged in the middle of the collecting cylinder; the inner cavity of the collecting cylinder is provided with a guide cylinder, and a first telescopic assembly is fixedly connected to the guide cylinder; the absorption assembly comprises sterilized cotton and a guide pipe, a second telescopic assembly is fixedly connected to the guide pipe, the sterilized cotton is detachably connected to the movable end of the second telescopic assembly, and a cover cap is detachably connected to the bottom of the guide pipe; a blood drawing needle and a blood collection tube are fixedly connected to two ends of the hose respectively, the blood drawing needle is fixedly connected with the telescopic end of the first telescopic assembly, the blood drawing needle is in sliding connection with the guide cylinder, the collection cylinder and the guide tube, and the top of the blood collection tube penetrates through the guide cylinder and the collection cylinder; the control assembly comprises a first connecting rod, a second connecting rod and a limiting block, the first connecting rod is detachably connected with the movable end of the first telescopic assembly, and the end part of the first connecting rod is fixedly connected with an operating handle. The utility model can reduce occupational exposure of medical personnel for blood sample collection and improve safety.

Description

Hepatitis B inspection blood collection system

Technical Field

The utility model relates to the field of medical instruments, in particular to a blood sample collecting device for hepatitis B examination.

Background

Hepatitis B generally refers to chronic viral hepatitis B, which is caused by Hepatitis B Virus (HBV) infection, hepatitis B virus infectors and HBV carriers are the main infection sources of the disease, and HBV can be transmitted by mother and baby, blood and blood products, damaged skin mucosa and sexual contact. Occupational exposure appears when medical personnel extract the blood for hepatitis B virus infector is the most common occupational exposure of clinical, especially in the in-process of drawing blood needle and drawing out aftertreatment, detect hepatitis B infection and need gather blood inspection viral load and hepatitis B two and half usually, need blood sampling in addition in the treatment process often, need highly to pay attention to the security to this type of hepatitis B virus infector blood sample collection.

When an existing blood sample collecting device is used for collecting blood samples, particularly in the process of after-treatment after a blood drawing needle is pulled out, blood easily splashes out to cause infection to medical workers, the exposed blood drawing needle easily causes puncture wound of the medical workers to cause cross infection, and the safety is low.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve or ameliorate at least one of the above problems.

In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a blood sample collecting device for hepatitis B examination, which comprises a collecting cylinder, an absorption assembly, a hose and a control assembly, wherein the collecting cylinder is arranged on the upper part of the collecting cylinder;

the inner cavity of the collecting cylinder is provided with a guide cylinder, and the bottom wall of the inner side of the guide cylinder is fixedly connected with a first telescopic assembly;

the absorption assembly comprises sterilized cotton and a guide pipe fixedly connected to the bottom end of the collection cylinder, the bottom of the guide pipe is open, a second telescopic assembly is fixedly connected to the inner top wall of the guide pipe, the sterilized cotton is detachably connected to the movable end of the second telescopic assembly, and the bottom of the guide pipe is detachably connected with a cover cap;

the flexible tube is positioned in the guide cylinder, a blood drawing needle and a blood collection tube are fixedly connected to two ends of the flexible tube respectively, the blood drawing needle is fixedly connected with the telescopic end of the first telescopic assembly, the bottom of the blood drawing needle sequentially penetrates through the guide cylinder, the collection cylinder and the guide tube and extends out of the sterilized cotton, the blood drawing needle is slidably connected with the guide cylinder, the collection cylinder and the guide tube, the top of the blood collection tube penetrates through the guide cylinder and the collection cylinder, a collection assembly is fixedly connected to the top of the blood collection tube, and the blood collection tube is fixedly connected with the collection cylinder;

the control assembly comprises a first connecting rod and a fixedly connected second connecting rod on the first connecting rod and a limiting block fixedly connected at the end part of the second connecting rod, the first connecting rod runs through the collecting cylinder and extends into the inner cavity of the guide cylinder, the first connecting rod is detachably connected with the movable end of the first telescopic assembly, the limiting block runs through the catheter and is detachably connected with the movable end of the second telescopic assembly, and an operating handle is fixedly connected with the end part of the first connecting rod.

Preferably, first flexible subassembly includes the rigid coupling is in a plurality of first springs of guide cylinder inside wall bottom, the rigid coupling is in the first piston piece at first spring top, first through-hole has been seted up at the middle part of first piston piece, it runs through to take out the blood needle first through-hole, and take out the blood needle with first through-hole rigid coupling, the lateral wall of first piston piece with the inside wall sliding connection of guide cylinder, it is a plurality of first spring sets up take out the blood needle with between the inside wall of guide cylinder, first connecting rod with the collection section of thick bamboo guide cylinder sliding connection, the tip of first connecting rod stretch into to in the inner chamber of guide cylinder, and with the top butt of first piston piece.

Preferably, the flexible subassembly of second includes the rigid coupling is in a plurality of second springs, rigid coupling on the inboard roof of pipe are in the second piston piece of second spring bottom, the second through-hole has been seted up at the middle part of second piston piece, it runs through to take out the blood needle the second through-hole, and take out the blood needle with second piston piece sliding connection, the lateral wall of second piston piece with the inside wall sliding connection of pipe, it is a plurality of the second spring sets up take out the blood needle with between the inside wall of pipe, the aseptic cotton can be dismantled and connect and be in the bottom of second piston piece, the stopper with pipe sliding connection, the tip of stopper stretch into in the pipe and with the bottom butt of second piston piece.

Preferably, the first connecting rod is fixedly connected with an anti-drop ring, and the anti-drop ring is positioned between the inner side wall of the collecting cylinder and the outer side wall of the guide cylinder.

Preferably, the bottom end face center of the collection cylinder, the bottom end face center of the guide cylinder and the top end face center of the guide pipe are all provided with connecting through holes, sealing rings are fixedly connected in the connecting through holes, and the blood drawing needle penetrates through the connecting through holes and is in sliding connection with the sealing rings.

Preferably, the bottom of the blood drawing needle extends into the cap, and the cap is in threaded connection with the outer side wall of the catheter.

Preferably, a clamping handle is fixedly connected to the outer side wall of the collecting cylinder.

Preferably, the inner wall of the collecting cylinder is fixedly connected with an upper limiting ring, the upper limiting ring is fixedly connected with the guide cylinder, the upper limiting ring extends into the inner cavity of the guide cylinder, the upper limiting ring is located at the top of the first piston sheet, a third through hole is formed in the upper limiting ring, and the hose penetrates through the third through hole.

The utility model discloses the following technical effects:

the cap can protect the blood drawing needle before blood drawing, and blood can be collected by disassembling the cap; the blood drawing needle is fixedly connected with the first telescopic component, the operating handle is pulled out after collection is finished, the operating handle drives the first connecting rod and the second connecting rod to be drawn out synchronously, so that the first telescopic component is separated from the first connecting rod, the second telescopic component is separated from the limiting block, the first telescopic component and the second telescopic component release elasticity, the first telescopic component drives the blood drawing needle upwards into the inner cavity of the collection cylinder, the leakage of the blood drawing needle infected with the blood sample of a hepatitis B virus infected person is avoided, the potential safety hazard to medical personnel is avoided, and the occupational exposure of the medical personnel is reduced; simultaneously the flexible subassembly of second drives the aseptic cotton and pushes down, disinfect to hepatitis B virus infector blood drawing department, absorb outer splash and remain the bloodstain of blood drawing department, medical personnel reuse tools such as medical sticky tape with the aseptic cotton fix hepatitis B virus infector blood drawing department can, not only can push the aseptic cotton when retracting the blood drawing needle, shorten the time of drawing blood, improve the blood drawing efficiency, can also effectively avoid the blood drawing needle to extract the back blood outer splash and remain medical personnel's that causes occupation expose, security when improving medical personnel's blood sampling.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a blood sample collection device for hepatitis B test according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

wherein, 1, collecting cylinder; 2. a guide cylinder; 3. sterilizing cotton; 4. a conduit; 5. capping; 6. a hose; 7. blood drawing needle; 8. a blood collection tube; 9. a first link; 10. a second link; 11. a limiting block; 12. an operating handle; 13. a first spring; 14. a first piston plate; 15. a second spring; 16. a second piston plate; 17. the anti-drop ring; 18. a seal ring; 19. a clamping handle; 20. an upper limiting ring; 21. a blood collection tube needle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-3, the utility model provides a blood sample collecting device for hepatitis b test, comprising a collecting cylinder 1, an absorption component, a hose 6 and a control component;

the inner cavity of the collecting cylinder 1 is provided with a guide cylinder 2, and the bottom wall of the inner side of the guide cylinder 2 is fixedly connected with a first telescopic component;

the absorption assembly comprises sterilized cotton 3 and a conduit 4 fixedly connected to the bottom end of the collection cylinder 1, the bottom of the conduit 4 is open, a second telescopic assembly is fixedly connected to the inner top wall of the conduit 4, the sterilized cotton 3 is detachably connected to the movable end of the second telescopic assembly, and the bottom of the conduit 4 is detachably connected with a cover cap 5; with the arrangement, the cap 5 can carry out sealing protection on the blood drawing needle 7 before blood collection, and blood collection can be carried out by disassembling the cap 5;

the flexible tube 6 is positioned in the guide cylinder 2, two ends of the flexible tube 6 are respectively and fixedly connected with a blood drawing needle 7 and a blood drawing tube 8, the blood drawing needle 7 is fixedly connected with the telescopic end of the first telescopic component, the bottom of the blood drawing needle 7 sequentially penetrates through the guide cylinder 2, the collection cylinder 1 and the guide tube 4 and extends out of the sterilized cotton 3, the blood drawing needle 7 is slidably connected with the guide cylinder 2, the collection cylinder 1 and the guide tube 4, the top of the blood drawing tube 8 penetrates through the guide cylinder 2 and the collection cylinder 1, the top of the blood drawing tube 8 is fixedly connected with the collection component, and the blood drawing tube 8 is fixedly connected with the collection cylinder 1; with the arrangement, after the medical staff finishes blood drawing, the first telescopic assembly is driven to release by pulling out the operating handle 12, so that the blood drawing needle 7 slides along the collection cylinder 1 and the guide cylinder 2 and retracts into the inner cavity of the collection cylinder 1, the needle head of the blood drawing needle 7 after blood drawing is prevented from being exposed, and occupational exposure of the medical staff is reduced;

the control assembly comprises a first connecting rod 9, a second connecting rod 10 fixedly connected to the first connecting rod 9 and a limiting block 11 fixedly connected to the end part of the second connecting rod 10, the first connecting rod 9 penetrates through the collecting cylinder 1 and extends into the inner cavity of the guide cylinder 2, the first connecting rod 9 is detachably connected with the movable end of the first telescopic assembly, the limiting block 11 penetrates through the guide pipe 4 and is detachably connected with the movable end of the second telescopic assembly, and the end part of the first connecting rod 9 is fixedly connected with an operating handle 12; according to the arrangement, the first telescopic assembly and the second telescopic assembly are in a compressed state during blood collection, after a medical worker finishes blood collection, the operating handle 12 is pulled out outwards, the operating handle 12 drives the first connecting rod 9 and the second connecting rod 10 to be synchronously pulled outwards, so that the first telescopic assembly is separated from the first connecting rod 9, the second telescopic assembly is separated from the limiting block 11, the first telescopic assembly and the second telescopic assembly release elasticity, the first telescopic assembly drives the blood drawing needle 7 upwards into the inner cavity of the collection cylinder 1, potential safety hazards to the medical worker due to the fact that the blood drawing needle 7 which is infected with the hepatitis B virus infectious blood sample leaks outwards are avoided, and occupational exposure of the medical worker is reduced; simultaneously the flexible subassembly of second drives aseptic cotton 3 and pushes down, disinfect to hepatitis B virus infector blood drawing department, absorb outer splash and remain the bloodstain of blood drawing department, medical personnel reuse tools such as medical sticky tape with aseptic cotton 3 fix hepatitis B virus infector blood drawing department can, not only can push out aseptic cotton when retracting blood drawing needle 7, shorten the time of drawing blood, improve the efficiency of drawing blood, can also effectively avoid blood 7 to extract the back blood and splash and remain medical personnel's that causes occupation expose, security when improving medical personnel's blood sampling.

According to a further optimization scheme, the first telescopic assembly comprises a plurality of first springs 13 fixedly connected to the bottom of the inner side wall of the guide cylinder 2, a first piston sheet 14 fixedly connected to the top of the first springs 13, a first through hole is formed in the middle of the first piston sheet 14, the blood drawing needle 7 penetrates through the first through hole, the blood drawing needle 7 is fixedly connected with the first through hole, the outer side wall of the first piston sheet 14 is slidably connected with the inner side wall of the guide cylinder 2, the plurality of first springs 13 are arranged between the blood drawing needle 7 and the inner side wall of the guide cylinder 2, the first connecting rod 9 is slidably connected with the collection cylinder 1 and the guide cylinder 2, and the end portion of the first connecting rod 9 extends into the inner cavity of the guide cylinder 2 and abuts against the top of the first piston sheet 14; so set up, when medical personnel took operating handle 12 out, drive first connecting rod 9 along gathering section of thick bamboo 1, guide cylinder 2 slides to the outside for first connecting rod 9 and the separation of first piston piece 14, a plurality of first springs 13 that are in compression state drive first piston piece 14 jack-up upwards, first piston piece 14 drives and takes out blood needle 7 upwards displacement, and then realizes taking out blood needle 7 and retract to gathering section of thick bamboo 1 inner chamber in, avoid taking out blood needle 7 needle point and leak outward.

According to a further optimization scheme, the second telescopic assembly comprises a plurality of second springs 15 fixedly connected to the top wall of the inner side of the conduit 4 and a second piston sheet 16 fixedly connected to the bottom of the second springs 15, a second through hole is formed in the middle of the second piston sheet 16, the blood drawing needle 7 penetrates through the second through hole, the blood drawing needle 7 is in sliding connection with the second piston sheet 16, the outer side wall of the second piston sheet 16 is in sliding connection with the inner side wall of the conduit 4, the plurality of second springs 15 are arranged between the blood drawing needle 7 and the inner side wall of the conduit 4, the sterile cotton 3 is detachably connected to the bottom of the second piston sheet 16, the limiting block 11 is in sliding connection with the conduit 4, and the end portion of the limiting block 11 extends into the conduit 4 and abuts against the bottom of the second piston sheet 16; so set up, medical personnel takes out when operation handle 12, drive first connecting rod 9, second connecting rod 10, stopper 11 slides to the outside, make stopper 11 and the separation of second piston piece 16, a plurality of second springs 15 that are in compression state drive second piston piece 16 ejecting downwards, second piston piece 16 drives aseptic cotton 3 and pushes out downwards, the realization is disinfected to hepatitis B virus infector the department of drawing blood, absorb outer splash and the bloodstain of remaining in the department of drawing blood, medical personnel reuse tools such as medical sticky tape with aseptic cotton 3 fix hepatitis B virus infector the department of drawing blood can, not only can push out aseptic cotton when retracting blood drawing needle 7, shorten the time of drawing blood, improve the efficiency of drawing blood, can also effectively avoid blood splash and remain medical personnel's that causes occupation to expose after blood drawing needle 7 extracts, security when improving medical personnel take a blood sample.

According to a further optimized scheme, the first connecting rod 9 is fixedly connected with an anti-drop ring 17, and the anti-drop ring 17 is positioned between the inner side wall of the collecting cylinder 1 and the outer side wall of the guide cylinder 2; the distance between the terminal surface that anticreep ring 17 is close to guide cylinder 2 and the terminal surface that the operation handle 12 was kept away from to first connecting rod 9 is less than anticreep ring 17 and keeps away from the terminal surface of guide cylinder 2 and the distance between the inside wall of collection section of thick bamboo 1, anticreep ring 17 keeps away from the terminal surface of guide cylinder 2 and the distance between the inside wall of collection section of thick bamboo 1 is greater than the length of stopper 11, so set up, when taking out operation handle 12, first connecting rod 9 is along collection section of thick bamboo 1, guide cylinder 2 slides to the outside and deviates from, anticreep ring 17 can avoid first connecting rod 9 to deviate from completely, and can make first connecting rod 9 and first piston piece 14 complete separation, also make stopper 11 and second piston piece 16 complete separation.

According to a further optimized scheme, connecting through holes are formed in the center of the bottom end face of the collecting cylinder 1, the center of the bottom end face of the guide cylinder 2 and the center of the top end face of the guide pipe 4, a sealing ring 18 is fixedly connected in each connecting through hole, the blood drawing needle 7 penetrates through each connecting through hole, and the blood drawing needle 7 is connected with the sealing ring 18 in a sliding mode; so set up, sealing washer 18 seals the slip department of taking a blood sample needle 7 and gathering section of thick bamboo 1, guide cylinder 2, pipe 4, effectively reduces the danger that blood leaks outward.

In a further optimized scheme, the bottom of the blood drawing needle 7 extends into the cap 5, and the cap 5 is in threaded connection with the outer side wall of the catheter 4; so set up, block 5 can carry out sealed the saving to drawing blood needle 7, when needs draw blood, unscrew block 5 and pipe 4 to the separation and can use.

Further optimize the scheme, the outer side wall of the collecting cylinder 1 is fixedly connected with a clamping handle 19, so that the medical personnel can conveniently carry out conventional blood drawing operation.

According to a further optimization scheme, an upper limiting ring 20 is fixedly connected to the inner wall of the collecting cylinder 1, the upper limiting ring 20 is fixedly connected with the guide cylinder 2, the upper limiting ring 20 extends into an inner cavity of the guide cylinder 2, the upper limiting ring 20 is located at the top of the first piston sheet 14, a third through hole is formed in the upper limiting ring 20, and the hose 6 penetrates through the third through hole; so set up, go up spacing ring 20 on the one hand can fix guide cylinder 2 in the inner chamber of collection section of thick bamboo 1, and on the other hand can restrict the position of first piston piece 14 for first piston piece 14 drives the steady retraction of blood drawing needle 7 to collection section of thick bamboo 1 in.

Further optimize the scheme, the collection subassembly includes the blood collection tube needle 21 with 8 top rigid couplings of blood collection tube, and the end connection of blood collection tube needle 21 has external vacuum blood collection tube (not shown in the figure), and blood collection tube needle 21 is used for exporting the blood sample of gathering, and vacuum blood collection tube (not shown in the figure) is saved the blood sample of gathering.

The working principle is as follows:

when the blood sampling device for hepatitis B examination is used, a medical worker firstly unscrews the cap 5 and the catheter 4 to separate, then holds the collecting barrel 1 and the clamping handle 19 outside the blood drawing needle 7 for conventional puncture, after the blood drawing needle 7 is punctured into a blood vessel, blood is conveyed to the blood drawing needle 21 at the tail part along the blood drawing needle 7, the hose 6 and the blood drawing tube 8, finally enters an externally connected vacuum blood drawing tube (not shown in the figure), the blood drawing needle 7 is pulled out after blood drawing is completed, the operating handle 12 is quickly pulled out, the blood drawing needle 7 is quickly retracted into the collecting barrel 1, the sterilized cotton 3 is quickly pushed out to the blood drawing part for hemostasis and disinfection, blood stains left at the blood drawing part are absorbed, and the medical worker fixes the sterilized cotton 3 at the blood drawing part of a hepatitis B virus infected person by using tools such as medical adhesive tapes and the like to finish the blood drawing operation process.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (8)

1. A device for collecting a blood sample for hepatitis b test, comprising:

the collecting device comprises a collecting cylinder (1), wherein a guide cylinder (2) is arranged in an inner cavity of the collecting cylinder (1), and a first telescopic assembly is fixedly connected to the bottom wall of the inner side of the guide cylinder (2);

the absorption assembly comprises sterilized cotton (3) and a conduit (4) fixedly connected to the bottom end of the collection cylinder (1), the bottom of the conduit (4) is open, a second telescopic assembly is fixedly connected to the top wall of the inner side of the conduit (4), the sterilized cotton (3) is detachably connected to the movable end of the second telescopic assembly, and the bottom of the conduit (4) is detachably connected with a cover cap (5);

the flexible tube (6), the flexible tube (6) is located in the guide cylinder (2), two ends of the flexible tube (6) are fixedly connected with a blood taking needle (7) and a blood taking tube (8) respectively, the blood taking needle (7) is fixedly connected with a telescopic end of the first telescopic assembly, the bottom of the blood taking needle (7) sequentially penetrates through the guide cylinder (2), the collection cylinder (1) and the guide tube (4) and extends out of the sterilized cotton (3), the blood taking needle (7) is slidably connected with the guide cylinder (2), the collection cylinder (1) and the guide tube (4), the top of the blood taking tube (8) penetrates through the guide cylinder (2) and the collection cylinder (1), the top of the blood taking tube (8) is fixedly connected with a collection assembly, and the blood taking tube (8) is fixedly connected with the collection cylinder (1);

control assembly, control assembly includes that first connecting rod (9), rigid coupling are in second connecting rod (10), rigid coupling on first connecting rod (9) are in stopper (11) of second connecting rod (10) tip, first connecting rod (9) run through collection section of thick bamboo (1) and stretch into extremely in the inner chamber of guide cylinder (2), first connecting rod (9) with the connection can be dismantled to the expansion end of first flexible subassembly, stopper (11) run through pipe (4) and with the connection can be dismantled to the expansion end of the flexible subassembly of second, the tip rigid coupling of first connecting rod (9) has handle (12).

2. A device for collecting a blood sample for hepatitis b test according to claim 1, wherein: the first telescopic component comprises a plurality of first springs (13) fixedly connected with the bottom of the inner side wall of the guide cylinder (2) and a first piston sheet (14) fixedly connected with the tops of the first springs (13), a first through hole is arranged in the middle of the first piston sheet (14), the blood drawing needle (7) penetrates through the first through hole, the blood drawing needle (7) is fixedly connected with the first through hole, the outer side wall of the first piston sheet (14) is in sliding connection with the inner side wall of the guide cylinder (2), a plurality of first springs (13) are arranged between the blood drawing needle (7) and the inner side wall of the guide cylinder (2), the first connecting rod (9) is connected with the collecting cylinder (1) and the guide cylinder (2) in a sliding way, the end part of the first connecting rod (9) extends into the inner cavity of the guide cylinder (2) and is abutted against the top part of the first piston sheet (14).

3. A device for collecting a blood sample for hepatitis b test according to claim 1, wherein: the second telescopic component comprises a plurality of second springs (15) fixedly connected on the inner top wall of the conduit (4) and a second piston sheet (16) fixedly connected at the bottom of the second springs (15), a second through hole is arranged in the middle of the second piston sheet (16), the blood drawing needle (7) penetrates through the second through hole, the blood drawing needle (7) is connected with the second piston plate (16) in a sliding way, the outer side wall of the second piston plate (16) is connected with the inner side wall of the guide pipe (4) in a sliding way, a plurality of second springs (15) are arranged between the blood drawing needle (7) and the inner side wall of the guide pipe (4), the sterilizing cotton (3) is detachably connected with the bottom of the second piston sheet (16), the limiting block (11) is connected with the guide pipe (4) in a sliding mode, and the end portion of the limiting block (11) extends into the guide pipe (4) and is abutted to the bottom of the second piston piece (16).

4. A device for collecting a blood sample for hepatitis b test according to claim 1, wherein: an anti-drop ring (17) is fixedly connected to the first connecting rod (9), and the anti-drop ring (17) is located between the inner side wall of the collecting cylinder (1) and the outer side wall of the guide cylinder (2).

5. A device for collecting a blood sample for hepatitis b test according to claim 1, wherein: the bottom end face center department of collection section of thick bamboo (1), the bottom end face center department of guide cylinder (2), connecting hole has all been seted up to the top end face center department of pipe (4), the rigid coupling has sealing washer (18) in the connecting hole, draw blood needle (7) run through connecting hole and draw blood needle (7) with sealing washer (18) sliding connection.

6. A device for collecting a blood sample for hepatitis b test according to claim 1, wherein: the bottom of the blood drawing needle (7) extends into the cap (5), and the cap (5) is in threaded connection with the outer side wall of the guide tube (4).

7. A device for collecting a blood sample for hepatitis b test according to claim 1, wherein: the outer side wall of the collecting cylinder (1) is fixedly connected with a clamping handle (19).

8. A device for collecting a blood sample for hepatitis b test according to claim 2, wherein: the rigid coupling has last spacing ring (20) on the inner wall of collection section of thick bamboo (1), go up spacing ring (20) with guide cylinder (2) rigid coupling, and go up spacing ring (20) stretch into to in the inner chamber of guide cylinder (2), it is located to go up spacing ring (20) the top of first piston piece (14), last spacing ring (20) is gone up and has been seted up the third through-hole, hose (6) run through the third through-hole.

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