CN109200396B

CN109200396B - Needleless injection connection device

Info

Publication number: CN109200396B
Application number: CN201810769773.4A
Authority: CN
Inventors: 覃万翔; 李雪薇
Original assignee: First Affiliated Hospital of PLA Military Medical University
Current assignee: First Affiliated Hospital of PLA Military Medical University
Priority date: 2018-07-13
Filing date: 2018-07-13
Publication date: 2020-12-01
Anticipated expiration: 2038-07-13
Also published as: CN109200396A

Abstract

The invention relates to the field of needleless injection, in particular to a needleless injection connecting device, which comprises a connecting pipe, a push-pull plate and a pushing and rotating mechanism, wherein two first arc-shaped grooves are formed in the inner pipe wall of the connecting pipe, and a first bayonet is formed in the wall of each first arc-shaped groove; the push-pull plate is provided with a second arc-shaped groove and a second bayonet; the rotary mechanism comprises a plurality of rotary units, each rotary unit comprises a connecting rod, a first rotary claw and a second rotary claw, the first rotary claw is fixed at one end of the connecting rod, the second rotary claw is fixed at the other end of the connecting rod, the first rotary claw and the second rotary claw are different in surface, the connecting rod is rotatably arranged in the pipe wall of the connecting pipe, a torsional spring is arranged between the connecting rod and the connecting pipe, when the torsional spring is in a natural state, the first rotary claw is located in the first bayonet, and the second rotary claw is located on one side of the second bayonet. When the technical scheme is adopted, the injector is conveniently connected to the injection pen, and the cost burden of a patient is reduced.

Description

Needleless injection connection device

Technical Field

The invention relates to the field of needleless injection, in particular to a needleless injection connecting device.

Background

Syringes have been used officially for over 300 years to date in medicine. The traditional syringe brings a lot of convenience to human beings, but along with the improvement of the living standard of human beings, the traditional syringe has some problems, such as easily causing the spread of infectious diseases, needle infection, sharing needle, pain, subcutaneous nodules and other adverse factors caused by long-term injection.

The foreign reports show that the number of medical staff stabbed by needles or medical sharp instruments reaches 80 million and nurses stab 80 to 100 million times each year among 440 million medical staff in the United states; the situation in China is not optimistic: the increasing number of cases of infection due to unsafe injections causes a direct economic loss, and 87.5% of nurses experience sharp-needle puncture. Meanwhile, the diabetes patients need to supplement insulin regularly to reduce blood sugar, injection is undoubtedly the best mode, and due to frequent injection, intramuscular injection is easy to cause adverse reactions such as inflammation, allergy, muscular atrophy and the like.

Safe injections have been a social concern worldwide, and in developing countries, children receive 55 hundred million injections per year, of which 10% of immune injections are unsafe. Each injection including immunization is about 30 hundred million times every year in China, and in some areas, the phenomenon that the injector and the needle which are used repeatedly without disinfection and the disposable injector return to the market after use exists, which poses a great threat to patients needing injection.

The existing needleless injector well solves the problem, and comprises an injection pen, a medicine tube and a medicine taking interface, wherein a piston at the tail part of the medicine tube is fixed on a push rod of the injection pen when the needleless injector is used, the head part of the medicine tube is connected with the medicine taking interface to adsorb liquid medicine from a medicine bottle, after the medicine taking interface is detached, the head part of the medicine tube is pressed on an injection part of a human body, the injection pen is vertical to the surface of skin, and the liquid medicine in the medicine tube is injected into the human body through high pressure in the injection pen.

In the case of replacing the injection liquid medicine, in order to ensure safety, a new medicine tube needs to be replaced before the next use; the cost of the medicine tube is expensive, which is a burden for patients, and the medicine tube needs to be discarded after each use, which is a waste of resources.

Disclosure of Invention

The invention aims to provide a connecting device for conveniently connecting an injector to an injection pen.

In order to achieve the above purpose, the technical scheme of the invention provides a needleless injection connecting device, which comprises a connecting pipe, a push-pull plate and a rotary pushing mechanism, wherein two first arc-shaped grooves are arranged on the inner pipe wall of the connecting pipe, and a first bayonet is arranged on the groove wall of each first arc-shaped groove; the push-pull plate is arranged in the connecting pipe in a sliding mode, one end of the push-pull plate is fixedly connected with a push rod of the injection pen, the other end of the push-pull plate is provided with a through groove, a baffle is fixed on the side wall of the through groove, one end of the baffle and the side wall of the through groove form a second arc-shaped groove, and a second bayonet is formed between the baffle and the bottom of the through groove;

the rotary mechanism comprises a plurality of rotary units, each rotary unit comprises a connecting rod, a first rotary claw and a second rotary claw, the first rotary claw is fixed at one end of the connecting rod, the second rotary claw is fixed at the other end of the connecting rod, the first rotary claw and the second rotary claw are arranged on different surfaces of the rotary claw, the connecting rod is arranged in the pipe wall of the connecting pipe in a rotating mode, a torsional spring is arranged between the connecting rod and the connecting pipe, the torsional spring is in a natural state, the first rotary claw is located in the first bayonet, and the second rotary claw is located on one side of the second bayonet.

The technical effect of the scheme is as follows: 1. through fixed connecting pipe on the injection pen, when needs injection liquid medicine, push into first arc wall with the turn-up department of cylinder in, then rotate the cylinder, can block the cylinder into first bayonet socket internal fixation. In the process of rotating the syringe, the curled edge of the syringe contacts with the first scraping and rotating claw and pushes the first scraping and rotating claw to rotate, so that the second scraping and rotating claw is driven to rotate through the connecting rod, when the second scraping and rotating claw contacts with the core rod of the injector, the core rod is driven to rotate, and the core rod is clamped into the second clamping opening, so that the injector is connected with the injection pen, the substitution of the injector for the medicine tube is realized, and the payment cost of a patient is reduced.

2. The first rotary claw drives the second rotary claw to rotate through the connecting rod, and drives the core rod to rotate along with the needle cylinder, so that the effect of preventing the core rod of the injector from being twisted off is achieved.

3. In the process of injecting the liquid medicine, the second rotary claw can limit the push-pull plate, so that a piston of the injector is prevented from breaking through the needle cylinder, and the body of a patient is prevented from being damaged.

4. When the first rotary claw is contacted with the curled edge of the needle cylinder and the second rotary claw is contacted with the core rod of the injector, marks are marked on the needle cylinder and the core rod, and when the injector is taken down and not discarded in time, whether the injector is used or not is easily distinguished, so that the injector is effectively prevented from being repeatedly used, and the body health of a patient is ensured.

Further, be equipped with the bar hole on the pipe wall of connecting pipe, be equipped with the recess on the push-and-pull plate, be equipped with locking mechanism in the recess, locking mechanism includes spring and locking strip, the tank bottom fixed connection of one end and the recess of spring, the other end and the locking strip fixed connection of spring, the locking strip can be followed the recess and bounced to the bar downthehole. The technical effect of the scheme is as follows: after the injector extracts the liquid medicine, the push-pull plate is locked through the locking mechanism, so that the core rod is locked, and the injection is unlocked after the needle cylinder is aligned to the skin.

Furthermore, a through hole is formed in the pipe wall of the connecting pipe, the through hole is close to one end of the second bayonet, and the through hole and the strip-shaped hole are located on the same straight line. The technical effect of the scheme is as follows: after the injection is finished, the locking strip is bounced into the through hole under the action of the spring, so that the push-pull plate is prevented from moving continuously, the piston is prevented from breaking the needle cylinder, and the patient is prevented from being injured.

Furthermore, a sliding hole is formed in the tube wall of the connecting tube, a push-pull rod is fixed on a push rod of the injection pen, and the push-pull rod penetrates through the sliding hole and is slidably arranged in the sliding hole. The technical effect of the scheme is as follows: the sliding hole can limit the moving path of the push-pull rod, so that the push-pull plate and the core rod can stably move, and smooth injection can be realized.

Furthermore, a sliding groove is formed in the outer pipe wall of the connecting pipe, a blocking block is arranged in the sliding groove in a sliding mode, and the blocking block can block the sliding of the push-pull rod. The technical effect of the scheme is as follows: when a patient needs to inject for multiple times, the push-pull rod is blocked by poking the blocking block, so that the push rod, the push-pull plate and the core rod are blocked, and then a cylinder of liquid medicine is injected for multiple times.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

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

FIG. 3 is a schematic view of a single-use syringe during dispensing;

FIG. 4 is a left side view of the connecting tube of FIG. 1;

FIG. 5 is a schematic view of the needle cylinder entering the first arcuate slot;

FIG. 6 is a schematic view of the syringe being engaged in the first bayonet;

FIG. 7 is a schematic view of the core pin entering the second arcuate slot;

FIG. 8 is a schematic view of a core rod entering a second bayonet;

FIG. 9 is a schematic view of the flipping unit;

fig. 10 is a right side view of the connection tube of fig. 1.

Detailed Description

The following is further detailed by the specific embodiments:

reference numerals in the drawings of the specification include: the pen comprises a connecting pipe 1, a push-pull plate 2, a needle cylinder 3, a piston 4, a core rod 5, a pen body 6, a first spring 7, a push rod 8, a first arc-shaped groove 9, a first bayonet 10, a push-pull rod 11, a through groove 12, a baffle 13, a second arc-shaped groove 14, a second bayonet 15, a groove 16, a second spring 17, a locking strip 18, a through hole 19, a strip-shaped hole 20, a connecting rod 21, a first pushing and rotating claw 22, a second pushing and rotating claw 23, a torsion spring 24, a sliding groove 25 and a blocking block 26.

The needleless injection connecting device shown in fig. 1, 2 and 3 comprises a connecting pipe 1, a push-pull plate 2 and a scraping and rotating mechanism, wherein the left end of the connecting pipe 1 is connected with a disposable injector, the disposable injector comprises a needle cylinder 3, a piston 4 and a core rod 5, and the part of the right end of the needle cylinder 3 protruding upwards and downwards is called a needle cylinder curled edge; the piston 4 is arranged in the needle cylinder 3 in a sliding way, the core rod 5 is fixedly connected with the piston 4, and the right end of the core rod 5 is also curled towards the core rod which protrudes up and down. The right end of the connecting pipe 1 is connected with the injection pen, in the embodiment, the injection pen comprises a pen body 6, a first spring 7 and a push rod 8, the pen body 6 is fixedly connected with the right end of the connecting pipe 1, the right end of the first spring 7 is fixedly connected with the pen body 6, and the left end of the first spring 7 is fixedly connected with the push rod 8; of course other pressurizing means known in the art can be used with the injection pen.

As shown in fig. 4, 5 and 6, the inner wall of the connecting pipe 1 is provided with an upper first arc-shaped groove 9 and a lower first arc-shaped groove 9, the right wall of the first arc-shaped groove 9 at the upper end is provided with a first bayonet 10, and the left wall of the first arc-shaped groove 9 at the lower end is also provided with a first bayonet 10. As shown in fig. 2, the push-pull plate 2 is circular, the push-pull plate 2 is slidably disposed in the connecting pipe 1, the right end of the push-pull plate 2 is fixedly connected to the left end of the push rod 8, the push-pull rods 11 are fixed to the front and rear sides of the push rod 8, and a through groove 12 is formed in the left end of the push-pull plate 2. As shown in fig. 7 and 8, a baffle 13 is fixed on the left side wall of the lower end of the through groove 12, a second arc-shaped groove 14 is formed between the right end of the baffle 13 and the right side wall of the through groove 12, and a second bayonet 15 is formed between the baffle 13 and the bottom of the through groove 12 (the second bayonet 15 is shown in fig. 2); similarly, a baffle 13 is fixed on the right side wall at the upper end of the through groove 12, a second arc-shaped groove 14 is formed between the left end of the baffle 13 and the left side wall of the through groove 12, and a second bayonet 15 is formed between the baffle 13 and the bottom of the through groove 12.

As shown in fig. 2, the side wall of the push-pull plate 2 is provided with an upper groove 16 and a lower groove 16, each groove 16 is internally provided with a locking mechanism, the locking mechanism comprises a second spring 17 and a locking bar 18, one end of the spring is fixedly connected with the bottom of the groove 16, and the other end of the spring is fixedly connected with the locking bar 18. The wall of the connecting pipe 1 is provided with a through hole 19, and the locking strip 18 can be sprung into the through hole 19 from the groove 16. As shown in fig. 3, a strip-shaped hole 20 is formed in the wall of the connecting tube 1, the strip-shaped hole 20 and the through hole 19 are located on a horizontal line, and the locking strip 18 can also be sprung into the strip-shaped hole 20 from the groove 16.

The raking and rotating mechanism comprises two raking and rotating units, as shown in fig. 9, each raking and rotating unit comprises a connecting rod 21, a first raking and rotating claw 22 and a second raking and rotating claw 23, the first raking and rotating claw 22 is fixed at the left end of the connecting rod 21, the second raking and rotating claw 23 is fixed at the right end of the connecting rod 21, the first raking and rotating claw 22 inclines forwards relative to a vertical plane where the connecting rod 21 is located, and the second raking and rotating claw 23 inclines backwards. As shown in fig. 2, the connecting rod 21 is rotatably disposed in the pipe wall of the connecting pipe 1, and a torsion spring 24 is disposed between the connecting rod 21 and the connecting pipe 1; when the torsion spring 24 is in a natural state, as shown in fig. 4, the first rotating claw 22 is located in the first bayonet 10; as shown in fig. 7, the second claw 23 is located behind the second arc-shaped groove 14 and at the same time on the side of the second bayonet 15.

In addition, as shown in fig. 10, a sliding hole is formed on the tube wall of the connection tube 1, the push-pull rod 11 passes through the sliding hole, the push-pull rod 11 is slidably disposed in the sliding hole, and the free end of the push-pull rod 11 is located outside the connection tube 1. The outer wall of the connecting pipe 1 is provided with a sliding groove 25 shaped like a Chinese character 'tu', in this embodiment, the sliding groove 25 is provided in the middle of the connecting pipe 1, a stop block 26 is slidably provided in the sliding groove 25, and when the stop block 26 in fig. 10 is moved downwards, the stop block 26 can stop the push-pull rod 11 from sliding backwards.

As shown in fig. 1, the cylinder 3 of the disposable syringe is fixed on the connecting tube 1, and at the same time, the core rod 5 is fixed on the push-pull plate 2, and when the fixing is performed, as shown in fig. 5, the cylinder crimping is aligned with the first arc-shaped groove 9, and at the same time, as shown in fig. 7, the core rod crimping is aligned with the second arc-shaped groove 14; then the needle cylinder 3 shown in fig. 5 is moved backwards, the core rod 5 shown in fig. 7 moves backwards with the needle cylinder 3, and when the core rod 5 abuts against the through slot 12, the needle cylinder 3 shown in fig. 5 is rotated clockwise into the first bayonet 10 shown in fig. 6.

During the clockwise rotation of the needle cylinder 3, as shown in fig. 5, the rolled edge of the needle cylinder contacts the first claw 22, thereby pushing the first claw 22 to rotate against the needle to the position shown in fig. 6. As shown in fig. 9, in the process that the first rotary claw 22 rotates counterclockwise, the connecting rod 21 drives the second rotary claw 23 to rotate counterclockwise; when the second claw 23 is brought into contact with the core pin crimp as shown in fig. 7, the core pin 5 is thereby rotated counterclockwise into the second bayonet 15 as shown in fig. 8 (see fig. 2 for the second bayonet 15).

Then the left end of the needle cylinder 3 shown in fig. 1 is inserted into a bottle filled with a liquid medicine, the push-pull rod 11 shown in fig. 10 is pulled to move forward, that is, the push-pull rod 11 shown in fig. 1 is pulled to move rightward, so that the push-pull plate 2 is driven to move rightward, and further the core rod 5 and the piston 4 are driven to move rightward (in the process, the first spring 7 is compressed), when the core rod 5 and the piston 4 move to the positions shown in fig. 3, the locking strip 18 is sprung into the strip-shaped hole 20 from the groove 16 under the action of the second spring 17 to lock the push-pull plate 2, and at the moment, the liquid medicine is sucked into the needle cylinder 3.

When injecting the liquid medicine, the syringe 3 is vertically pressed against the skin as shown in fig. 3, then the locking strip 18 is pressed, after the locking strip 18 completely enters the groove 16, the push-pull plate 2 moves rapidly to the left under the strong pressure generated by the first spring 7, and drives the core rod 5 and the piston 4 to move to the left, so that the liquid medicine in the syringe 3 penetrates through the skin and is injected into the body without a needle.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these should be construed as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.

Claims

1. The needleless injection connecting device comprises a connecting pipe and a push-pull plate, wherein the push-pull plate is arranged in the connecting pipe in a sliding manner, and one end of the push-pull plate is fixedly connected with a push rod of an injection pen; the method is characterized in that: the inner pipe wall of the connecting pipe is provided with two first arc-shaped grooves, and the wall of each first arc-shaped groove is provided with a first bayonet; a through groove is formed in the other end of the push-pull plate, a baffle is fixed on the side wall of the through groove, a second arc-shaped groove is formed between one end of the baffle and the side wall of the through groove, and a second bayonet is formed between the baffle and the bottom of the through groove;

2. The needle-free injection connection of claim 1 wherein: the pipe wall of the connecting pipe is provided with a strip-shaped hole, the push-pull plate is provided with a groove, the groove is internally provided with a locking mechanism, the locking mechanism comprises a spring and a locking strip, one end of the spring is fixedly connected with the bottom of the groove, the other end of the spring is fixedly connected with the locking strip, and the locking strip can be bounced into the strip-shaped hole from the groove.

3. The needle-free injection connection of claim 2 wherein: the pipe wall of the connecting pipe is provided with a through hole, the through hole is close to one end of the second bayonet, and the through hole and the strip-shaped hole are located on the same straight line.

4. The needle-free injection connection of claim 3 wherein: the tube wall of the connecting tube is provided with a sliding hole, a push-pull rod is fixed on a push rod of the injection pen, and the push-pull rod penetrates through the sliding hole and is arranged in the sliding hole in a sliding mode.

5. The needle-free injection connection of claim 4 wherein: the outer pipe wall of the connecting pipe is provided with a sliding groove, a blocking block is arranged in the sliding groove in a sliding mode, and the blocking block can block the sliding of the push-pull rod.