CN109663178B

CN109663178B - Automatic safe vacuum anti-needle-punching syringe and needle head returning method

Info

Publication number: CN109663178B
Application number: CN201811583326.6A
Authority: CN
Inventors: 曹耀锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2021-06-18
Anticipated expiration: 2038-12-24
Also published as: CN109663178A

Abstract

The invention discloses an automatic safe vacuum anti-needle-punching injector and a needle head retraction method, comprising an injector outer sleeve with a hollow cavity, wherein a core bar is arranged in the injector outer sleeve; the end part of the core rod is provided with a pull-back mechanism matched with the injection mechanism; a needle protection cap is sleeved outside the fixed needle base; can be through the principle of cavity pressure differential, design the pull-back mechanism in the core bar, and install the collet in the stationary needle file, collet cavity is hung back device and syringe needle, make after the injection, can be smooth return the syringe needle to the core bar smoothly through the pull-back mechanism in, the improvement of this structure, the requirement of syringe disposable has both been improved, the syringe needle exposes medical personnel's injury after having reduced the injection and accomplished, the injury of syringe needle to treatment staff when having solved again and handling medical waste product, the drawback of the sharp injury of syringe needle after the non-used repeatedly of syringe and use has been solved effectively.

Description

Automatic safe vacuum anti-needle-punching syringe and needle head returning method

Technical Field

The invention relates to the technical field of medical instruments, in particular to an automatic safe vacuum anti-needle-prick syringe and a needle head retraction method.

Background

As early as the 15 th century, kathler, italian, proposed the principle of the syringe. The first human trials were not performed until 1657 in the british boyle and rayne. Abel, a surgeon in the French Queen Louis sixteen (in 1774 and 1792) military, has also conceived a piston syringe. Prasutz in france is generally considered the inventor of the syringe. He manufactured the syringe in 1853, which was made of silver and had a volume of only 1 ml and a threaded plunger rod.

The first Fragren of England used a glass syringe. The glass has good transparency, and the condition of the injected medicine can be seen. The syringe made of glass tube metal can be used for sterilization by boiling, and the needle can be used for sharpening and sterilization. The existing syringe is made of plastic and is thrown away once, so that the risk of infection during injection is greatly reduced. In order to ensure hygiene and prevent cross-infection, modern syringes are often made of plastic.

Because the existing disposable sterile syringe has the phenomenon of repeated use, the cross infection of germs is increased, and potential harm is brought to users. Meanwhile, after the injection of the injector is finished, the phenomenon that the clinical user is injured by the exposed needle head is also not fresh. This causes great harm to medical work.

Disclosure of Invention

Aiming at the defects or shortcomings, the invention aims to provide an automatic safe vacuum anti-needle-punching syringe, which not only improves the requirement of the syringe on one-time use, reduces the injury of the exposed needle head to medical care personnel after injection is finished, but also solves the problem of the injury of the needle head to treatment personnel when medical waste is treated.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

an automatic safe vacuum anti-acupuncture injector comprises an injector outer sleeve with a hollow cavity, wherein a core bar is arranged in the injector outer sleeve, a fixed needle seat is arranged at the end part of the injector outer sleeve, and a retractable injection mechanism is arranged in the fixed needle seat; the end part of the core rod is provided with a pull-back mechanism matched with the injection mechanism; a needle protection cap is sleeved outside the fixed needle base;

the inner part of the core rod is a hollow cavity, and the pull-back mechanism is arranged at the end part of the hollow cavity to form a sealed vacuum sealed cavity;

the injection mechanism comprises a bottom support, a bottom support hollow hanging device and a needle head, one end of the bottom support is clamped at the end part of the fixed needle seat, the other end of the bottom support is sleeved with a moving part, and a vacuum sealing structure is arranged between the end part of the moving part and the fixed needle seat; the syringe needle passes behind the collet front end, and fixed mounting is in the collet, and the collet cavity is hung back the device and is installed in the syringe needle end to with collet sealing connection.

The auto-safety vacuum anti-needle-stick injector in claim, wherein the end of the bottom support is a reverse cone structure, and the needle head is fixed in the bottom support after passing through the reverse cone mechanism.

An auto-safety vacuum anti-needle-stick syringe according to claim or claim, wherein the collet hollow retraction device is of a pyramidal configuration and engages the end of a retraction mechanism.

An auto-safety vacuum anti-needle-stick syringe according to claim, wherein the moving part is clamped and fixed by clamping rings on the mounting and the fixed needle holder.

An auto-safety vacuum anti-needle-stick syringe according to claim or claim, wherein the moving part is of elastomeric construction.

The auto-safety vacuum anti-needle-stick injector in accordance with claim, wherein the opening of the bottom bracket is provided with a bottom bracket gap of 0.5mm-3 mm.

The auto-safety vacuum anti-needle-stick syringe of claim, wherein the retraction mechanism comprises a pointed retraction device mounted at the end of the core rod and a plunger sleeved on the outer wall of the end of the core rod; the end part of the sharp convex pull-back device is a sharp convex locking device which extends out of the end part of the core rod and is matched with the bottom support hollow hanging-back device; the tail end of the piston is fixed and limited through the initial piston limiting step, and the front end of the piston is fixed and limited through the core rod locking ring.

The auto-safety vacuum spike resistant syringe of claim wherein the outer wall of the middle portion of the spike pullback device is sealingly engaged with the inner wall of the core rod by a sealing clamp.

The auto-safety vacuum anti-needle-stick syringe of claim, wherein the vacuum pressure in the core rod is between-3 KPa and-30 KPa.

An automatic safe vacuum needle-prick prevention syringe needle withdrawing method comprises the following steps:

1) when in an initial state, a gap is arranged between the pull-back mechanism and the injection mechanism;

2) when the liquid medicine is sucked, the injection mechanism is fixed, the core rod is pulled up, and the liquid medicine enters the outer sleeve of the injector under the action of pressure difference;

3) when in injection, the core rod is pushed to move forwards, the pull-back mechanism is clamped with the bottom support hollow hanging-back device, the core rod continues to move forwards, the moving part is pushed to move forwards, and the core rod is clamped into the fixed needle seat;

4) and after the injection is finished, the pull-back mechanism and the bottom support are released, and the pull-back mechanism drives the bottom support, the hollow hanging-back device of the bottom support and the needle head to return to the inside of the core rod.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides an automatic safe vacuum anti-acupuncture syringe, which can design a pull-back mechanism in a core bar according to the principle of hollow pressure difference, and a bottom support, a bottom support hollow hanging-back device and a needle head are arranged in a fixed needle seat, so that the needle head can be smoothly returned to the core bar through the pull-back mechanism after injection is finished.

The invention further provides an automatic safe vacuum anti-needle-prick syringe needle head returning method, the pulling mechanism and the bottom support can be released after injection is finished through the pulling mechanism and the injection mechanism, the pulling mechanism drives the bottom support, the bottom support hollow hanging device and the needle head to return to the core rod, and needle head recovery is finished.

Drawings

FIG. 1 is a cross-sectional view of an automatic safety vacuum anti-needle-stick syringe of the present invention;

FIG. 2 is a cross-sectional view of the core rod of the automatic safety vacuum anti-needlestick syringe of the present invention;

FIG. 3 is a cross-sectional view of the automatic safety vacuum anti-needle-stick syringe pull-back mechanism of the present invention;

FIG. 4 is a cross-sectional, exploded view of the injection mechanism of the auto-safety vacuum anti-needle-stick syringe;

FIG. 5 is a schematic view of the automatic safety vacuum anti-needle-prick syringe according to the present invention in an initial state;

FIG. 6 is a schematic view of the automatic safety vacuum anti-needle-stick syringe of the present invention during the drawing of liquid medicine;

FIG. 7 is a schematic view of the automatic safety vacuum anti-needle-prick syringe according to the present invention;

FIG. 8 is a schematic view of the automatic safety vacuum anti-needle-stick syringe of the present invention with the needle retracted.

In the figure, 1000-core rod; 2000-injector jacket; 3000-pointed convex pull back device; 4000-a piston; 5000-bottom support; 6000-moving parts; 7000-fixing the needle seat; 8000-needle tip; 9000-needle protection cap; 1001-vacuum gas; 1002-sealing the clamping device; 1003-core bar press; 1004-piston initial limit step; 1005-core rod position locking ring; 3001-a pointed male locking device; 5001-bottom support hollow hanging device; 5002-bottom support fixing step; 5003-bottom support gap; 7001-core bar fixing position; 7002-fixing step of needle seat.

Detailed Description

The present invention will now be described in detail with reference to the drawings, wherein the described embodiments are only some, but not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.

Example one

As shown in fig. 1, the present invention provides an automatic safety vacuum anti-acupuncture injector, which comprises an injector outer sleeve 2000 with a hollow cavity, wherein a core bar 1000 is installed in the injector outer sleeve 2000, a fixed needle seat 7000 is installed at the end part of the injector outer sleeve 2000, and a retractable injection mechanism is installed in the fixed needle seat 7000; the end of the core rod 1000 is provided with a pull-back mechanism matched with the injection mechanism; a needle protection cap 9000 is sleeved outside the fixed needle base 7000;

specifically, as shown in fig. 2 and 3, a hollow cavity is arranged inside the core rod 1000, and the pull-back mechanism is installed at an end of the hollow cavity to form a sealed vacuum sealed cavity; the pull-back mechanism comprises a pointed convex pull-back device 3000 arranged at the end part of the core rod 1000 and a piston 4000 sleeved on the outer wall of the end part of the core rod 1000; the tip convex pull-back device 3000 has a tip convex locking device 3001 at the end, and the tip convex locking device 3001 extends out of the end of the core rod 1000 and is matched with the collet hollow hanging-back device 5001; the tail end of the piston 4000 is fixedly limited by a piston initial limiting step 1004, and the front end of the piston 4000 is fixedly limited by a core rod locking ring 1005. The outer wall of the middle part of the pointed convex pull-back device 3000 is hermetically clamped with the inner wall of the core rod 1000 through a sealing and clamping device 1002.

It should be noted that the interior of the core rod 1000 is of a vacuum structure, and the vacuum pressure is-3 KPa to-30 KPa; a core rod capture ring 1005 is designed on the head of the core rod 1000 so that the core rod 1000 of the syringe cannot be moved again after use. The plunger initial limit step 1004 is designed at the head of the core rod 1000 of the syringe, so that the plunger 4000 cannot move when the syringe sucks and injects the liquid medicine, and after the use is finished, the plunger 4000 moves to the rear of the core rod 1000 across the limit step.

Specifically, as shown in fig. 4, the injection mechanism includes a bottom support 5000, a bottom support hollow hanging device 5001 and a needle 8000, one end of the bottom support 5000 is clamped at the end of a fixed needle seat 7000, the other end of the bottom support 5000 is sleeved with a moving part 6000, and a vacuum sealing structure is formed between the end of the moving part 6000 and the fixed needle seat 7000; the needle 8000 passes through the front end of the bottom support 5000, and is fixedly arranged in the bottom support 5000, and the hollow hanging device 5001 in the bottom support is arranged at the tail end of the needle 8000 and is connected with the bottom support 5000 in a sealing way.

The end part of the bottom support 5000 is internally provided with an inverted cone structure, the needle 8000 passes through the inverted cone mechanism and then is fixedly arranged in the bottom support 5000, and the hollow hanging-back device 5001 of the bottom support is in the cone structure and is matched with the end part of the pull-back mechanism. The opening part of the bottom support 5000 is provided with a bottom support gap 5003 of 0.5mm-3mm, so that the sharp convex pull-back device 3000 of the core rod 1000 can easily enter. The bottom of the bottom support 5000 is provided with a bottom support fixing step 5002, and a needle seat fixing step 7002 clamped with the bottom support fixing step 5002 is arranged in the fixing needle seat 7000.

Further, the moving member 6000 is clamped and fixed by the collet 5000 and the clamping ring on the fixing needle base 7000, and the moving member 6000 is of an elastomer structure, so that the syringe product keeps a seal when in use.

The bottom end of the injection needle fixing needle seat 7000 is provided with a core bar 1000 fixing snap ring, so that the moving part 6000 and the bottom support 5000 can be clamped initially; when the piston retreats, the core rod can be clamped at the clamping ring and cannot move.

Example two

The invention provides an automatic safe vacuum anti-acupuncture syringe needle head retraction method based on embodiment one, which comprises the following steps:

1) as shown in fig. 5, in the initial state, a gap is provided between the retraction mechanism and the injection mechanism;

specifically, the pointed locking device 3001 is not in contact with the collet hollow hang back device 5001.

2) As shown in fig. 6, when the medical liquid is sucked, the injection mechanism is fixed, the core rod 1000 is pulled, and the medical liquid enters the syringe jacket 2000 under the action of pressure difference;

specifically, the annular piston 4000 is caught by the rings at the front and rear ends of the core rod 1000, and the piston 4000 does not move when the core rod 1000 is pulled to pump liquid. The acuate retraction device 3000 is caught by a step inside the core rod, and the position of the core rod 1000 does not change when drawing the medical solution and injecting the medicine. The needle 8000 and shoe 5000 are secured together by glue and thus remain stationary.

3) As shown in fig. 7, when injecting, the core rod 1000 is pushed to move forward, the pull-back mechanism is clamped with the collet hollow hanging-back device 5001, the core rod 1000 continues to move forward, the moving part 6000 is pushed to move forward, and the core rod 1000 is clamped into the fixed needle seat 7000;

specifically, the pointed locking device 3001 of the pointed drawing device 3000 in the drawing mechanism is clamped with the opening of the collet hollow hanging device 5001, the piston 4000 is blocked by the fixed needle seat 7000 and cannot move continuously, and only the core rod 1000 moves continuously at this time, and the moving part 6000 is pushed to move forwards.

4) As shown in FIG. 8, after the injection is completed, the retraction mechanism and the collet 5000 are released, and the retraction mechanism drives the collet 5000, the collet hollow retraction device 5001, and the needle 8000 back into the core rod 1000.

Specifically, the tab locking device 3001 on the tab retractor 3000 is inserted into a hole in the shoe 5000 for hanging;

core rod 1000 will push forward under the force of the pushing force, pushing moving part 6000 in the injection needle forward, but collet 5000 and fixed needle seat 7000 will not move.

The shoe 5000 does not move and pushes the inside nib pull-back device 3000 of the core rod 1000 towards the back of the core rod 1000.

Retaining needle hub 7000 will push plunger 4000 out of mandrel 1000 to move toward the rear of mandrel 1000.

The nib retracting device 3000 retracts inside the stem 1000 and is released from the position where it is stuck to the head of the stem 1000.

The collet hollow retractor 5001 is pulled by the collet locking device 3001 in front of the collet retractor 3000.

The locked collet 5000 is released due to the forward movement of the moving part 6000 in the injection needle, and the suction collet hollow hanging-back device 5001, the collet 5000 together with the needle 8000 and the pointed convex pulling-back device 3000 are retracted into the purple core rod 1000 due to the negative pressure inside the core rod 1000, thereby completing the retraction of the needle.

EXAMPLE III

An injection method of an automatic safety vacuum anti-acupuncture injector specifically comprises the following steps:

1. the product package is opened and the needle guard 9000 is removed.

2. The syringe plunger 4000 cannot move due to the plunger initial limit step 1004 of the core bar 1000 of the syringe by puncturing the needle 8000 into the medical fluid and sucking back the core bar 1000. As the plunger 1000 grips the seal 1002, fluid is drawn into the syringe jacket 2000 under negative pressure.

3. The needle 8000 is ejected upward to expel air bubbles inside the syringe jacket 2000.

4. Sterilizing the injection site of human body.

5. The injection site is pierced with an injection needle 8000, and the core rod 1000 is pressed to perform injection.

6. After the injection of the liquid medicine is completed, the acuate locking device 3001 on the acuate retraction device 3000 in the syringe core rod 1000 is easily inserted into the hollow collet retraction device 5001 of the needle collet 5000 due to the gap 5003 of the needle collet 5000.

7. The plunger 4000 is retracted toward the stem presser 1003 by pressing the stem 1000 again. Collet 5000 is immovable due to collet retention step 5002 being fixed with needle mount retention step 7002 of retention needle mount 7000.

8. At the same time, the core rod 1000 will press the moving part 6000 to move towards the needle 8000.

9. At the same time, the shoe 5000 will compress the male pullback device 3000 in the core rod 1000 towards the plunger rod 1000 where the hand is pressed 1003, disengaging the sealing jaw 1002 of the plunger rod 1000.

10. The forward movement of the moving part 6000 releases the clamped needle shoe 5000.

11. After the retraction device 3000 in the core rod 1000 moves towards the grip portion 1003 of the core rod 1000, the clamping function of the clamping and sealing device 1002 is released, but the sealing function is still maintained, and under the suction of the vacuum gas 1001 inside the core rod 1000, the retraction device 6000 in the core rod 1000 moves towards the grip portion 1003 of the core rod 1000.

12. Because the acuate convex pull-back device 3000 in the core bar 1000 is locked with the cork base 5000, when the acuate convex pull-back device 3000 in the core bar 1000 moves towards the core bar pressing part 1003, the cork base 5000 and the needle 8000 are driven to move towards the core bar 1000, thereby completing the retraction of the needle 8000 inside the core bar 1000.

13. As the locking ring 1005 for fixing the front end of the core rod 1000 is arranged in the core rod fixing position 7001 of the fixing needle seat 7000, the core rod 1000 cannot be moved again.

It will be appreciated by those skilled in the art that the above embodiments are merely preferred embodiments of the invention, and thus, modifications and variations may be made in the invention by those skilled in the art, which will embody the principles of the invention and achieve the objects and objectives of the invention while remaining within the scope of the invention.

Claims

1. An automatic safe vacuum anti-acupuncture syringe is characterized by comprising a syringe jacket (2000) with a hollow cavity, wherein a core bar (1000) is installed in the syringe jacket (2000), a fixed needle seat (7000) is installed at the end part of the syringe jacket (2000), and a retractable injection mechanism is installed in the fixed needle seat (7000); the end part of the core rod (1000) is provided with a pull-back mechanism matched with the injection mechanism; a needle protection cap (9000) is sleeved outside the fixed needle base (7000);

the interior of the core rod (1000) is a hollow cavity, and the pull-back mechanism is arranged at the end part of the hollow cavity to form a sealed vacuum sealed cavity;

the injection mechanism comprises a bottom support (5000), a bottom support hollow hanging and returning device (5001) and a needle head (8000), one end of the bottom support (5000) is clamped at the end part of a fixed needle seat (7000), the other end of the bottom support (5000) is sleeved with a moving part (6000), and a vacuum sealing structure is arranged between the end part of the moving part (6000) and the fixed needle seat (7000); the needle head (8000) penetrates through the front end of the bottom support (5000) and is fixedly arranged in the bottom support (5000), and the bottom support hollow hanging device (5001) is arranged at the tail end of the needle head (8000) and is in sealing connection with the bottom support (5000); the end part of the bottom support (5000) is internally provided with an inverted cone structure, and the needle head (8000) passes through the inverted cone structure and then is fixedly arranged in the bottom support (5000); the collet hollow hanging-back device (5001) is of a cone structure and is matched with the end part of the pull-back mechanism; the moving part (6000) is of an elastomer structure; the pull-back mechanism comprises a sharp convex pull-back device (3000) arranged at the end part of the core rod (1000) and a piston (4000) sleeved on the outer wall of the end part of the core rod (1000); the end part of the sharp convex pull-back device (3000) is a sharp convex locking device (3001), and the sharp convex locking device (3001) extends out of the end part of the core rod (1000) and is matched with the bottom support hollow hanging-back device (5001); the tail end of the piston (4000) is fixedly limited through a piston initial limiting step (1004), and the front end of the piston (4000) is fixedly limited through a core rod locking ring (1005).

2. An auto-safety vacuum anti-needle-stick syringe according to claim 1, characterized in that the moving part (6000) is clamped and fixed by clamping rings on the mounting (5000) and the fixed needle hub (7000).

3. The auto-safety vacuum anti-needle-stick injector according to claim 1, characterized in that the opening of the bottom support (5000) is provided with a bottom support gap (5003) of 0.5mm-3 mm.

4. An auto-safety vacuum anti-needle-stick syringe according to claim 1, wherein the outer wall of the middle part of the tip-convex pull-back means (3000) is sealingly engaged with the inner wall of the core rod (1000) by means of a sealing clamp means (1002).

5. An auto-safety vacuum anti-needle-stick syringe according to claim 1, characterized in that the vacuum pressure in the core rod (1000) is-30 KPa-3 KPa.