CN114392427A - Injector with medicine and manufacturing method thereof - Google Patents

Abstract

The invention provides an injector with medicine and a manufacturing method thereof, belonging to the technical field of medical appliances. It has solved the current syringe structure of taking medicine complicated, the more troublesome problem of operation. The injector with the medicine comprises a barrel, a push rod and a needle head, wherein the barrel is filled with the medicine and provided with a piston and push rod assembly, a needle sleeve is sleeved outside the needle head, and the other end of the push rod is sleeved with a top sleeve; the manufacturing method of the injector with the medicine is sequentially carried out according to the following steps: the first step is as follows: installing the extruded parison tube on a die; the second step is that: installing a needle head; the third step: blow molding or plastic molding; the fourth step: adding medicine and installing a piston push rod assembly; the fifth step: sealing and forming; and a sixth step: and (5) opening the mold. The injector with the medicine is simpler in structure, the needle sleeve, the top sleeve and the barrel form a sealed space, the medicine is effectively protected, the top sleeve and the needle sleeve can be removed to inject, and the injector is more convenient to use.

Description

Injector with medicine and manufacturing method thereof

Technical Field

The invention belongs to the technical field of medical appliances, and relates to an injector, in particular to an injector with medicine.

The invention belongs to the technical field of medical appliances, relates to a manufacturing method of an injector, and particularly relates to a manufacturing method of an injector with medicine.

Background

The syringe is a common medical appliance, mainly extracts or injects gas or liquid with the syringe needle, and traditional glass syringe and disposable plastic syringe must break off the glass ampule neck that contains the liquid medicine earlier before using, and the reuse syringe draws the liquid medicine, and glass particle and the bacterium in the air easily fall into and pollute the liquid medicine in the operation process, and is great to the human body harm.

The traditional syringe needs to be additionally matched with a liquid medicine bottle when being used for injecting a patient, the liquid medicine can be injected after being drawn by the syringe, and some liquid medicine is easy to react with a container, so that the syringe and the liquid medicine bottle which are made of special materials are needed, and the material is wasted.

Chinese patent (application number: 93242461.9) discloses a disposable syringe with medicine, which comprises a syringe tube, a needle head sleeve and a propeller, wherein a glass piston is filled after the medicine liquid is pre-filled in the syringe tube, a rubber plug seals the tail part and is sealed by an aluminum cover, and the syringe can store the medicine liquid and can be used for disposable direct injection; however, the technical scheme does not provide a method for manufacturing the syringe with the medicine, the structure for sealing the inner space of the syringe is complex, the piston is positioned outside the syringe, the piston is plugged into the syringe after the aluminum cover is unsealed during use, the matched piston is easy to lose during transportation and storage, the use steps are more, and the operation is more troublesome.

Disclosure of Invention

The invention provides a syringe with medicine, and aims to solve the technical problem of simplifying the structure of the syringe with medicine, so that the syringe with medicine is more convenient to operate, and the medicine in the syringe can be better protected.

The invention provides a manufacturing method of a syringe with medicine, and aims to solve the technical problem of how to industrially produce the syringe with medicine.

The technical problem to be solved by the invention can be realized by the following technical scheme: a syringe with medicine comprises a barrel body, a push rod and a needle head, wherein the barrel body comprises a main body part, a needle head seat part and a lug part, the needle head seat part is positioned at the front end of the main body part, the lug part is positioned at the rear end of the main body part, the main body part is filled with medicine, a piston is arranged in the main body part, one end of the push rod is connected with the piston, the other end of the push rod is positioned at the rear side of the barrel body, the needle head is fixedly connected with the needle head seat part, a needle sleeve is sleeved outside the needle head, the needle sleeve is connected with the needle head seat part into a whole, and the needle sleeve is connected with the needle head seat part through a first easily-broken structure; the other end of the push rod is sleeved with a top sleeve, the top sleeve and the lug part are connected into a whole, and the top sleeve and the lug part are connected through a second easily-broken structure; the first easy-to-break structure is broken by rotating the needle sleeve, the second easy-to-break structure is broken by rotating the top sleeve, the needle sleeve and the top sleeve can be conveniently taken down, the needle sleeve is connected with the needle head seat portion into a whole, and the top sleeve is connected with the lug portion into a whole, so that a sealing space is formed among the needle sleeve, the top sleeve and the barrel body, and the medicine in the barrel body is protected.

Preferably, the first easily-breaking structure is a first thickness-reducing annular notch, and the first thickness-reducing annular notch is used for reducing the wall thickness of the joint of the needle sleeve and the needle head seat part; or the first easy-to-break structure is a cutting dotted line positioned at the joint of the needle sleeve and the needle seat part.

Preferably, the second easily-broken structure is a second thickness-reduced annular notch, and the second thickness-reduced annular notch is used for reducing the wall thickness of the joint of the top sleeve and the lug part; or the second easily-broken structure is a cutting dotted line positioned at the joint of the reduced top sleeve and the lug part.

Compared with the prior art, hold the medicine in this barrel of taking medicine syringe, and push rod and piston are all in the barrel, and the needle cover of protection syringe needle and the top cover structure of protection piston push rod subassembly are simpler, and needle cover, top cover and barrel form confined space, and difficult push rod, piston and the medicine in the barrel that influence when transporting, depositing, it is more convenient to use, only needs to remove top cover and needle cover and just can inject.

A manufacturing method of an injector with medicine is sequentially carried out according to the following steps:

the first step is as follows: installing the extruded parison tube on a die; the mould includes bottom segment moulded die, middle section moulded die, seals mould and parison tube centre gripping subassembly, and the top section of extrusion molding parison tube is cliied to the parison tube centre gripping subassembly, and the extrusion molding parison tube is located the die cavity of mould, and the top mouth of extrusion molding parison tube is in the state of opening, has the EVOH layer in the extrusion molding parison tube.

The second step is that: installing a needle head; firstly, placing the needle head into an extrusion molding blank tube from top to bottom, then closing a bottom section forming die, forming the bottom section of the extrusion molding blank tube into a needle sleeve and a needle head seat part which are matched with an inner cavity of the bottom section forming die, and wrapping the needle head seat part on the needle head;

the third step: blow molding or plastic molding; expanding the middle section of the extrusion molding blank pipe to form a main body part, a lug part and a lower section of the top sleeve which are matched with the inner cavity of the middle section molding die;

the fourth step: adding medicine and installing a piston push rod assembly; the medicine is added into the main body part and the piston push rod assembly is arranged in the main body part in sequence under the condition that the inner cavity of the main body part is in a negative pressure state;

the fifth step: sealing and forming; closing the sealing die, forming the upper section of the extruded parison tube into an upper section of a top sleeve matched with the inner cavity of the closing die of the sealing die, wherein the inner cavity of the top sleeve is a closed cavity;

and a sixth step: and opening the mold, taking out the injector with the medicine and removing the flash.

Preferably, the needle comprises a needle tube part and a needle seat part made of plastic, the needle seat part is wrapped on the needle seat part, a connecting groove is formed in the outer side surface of the needle seat part, and a corresponding connecting convex block is formed on the inner wall of the needle sleeve after die assembly forming, so that the needle sleeve can be fixed on the needle seat part through interference fit; the first easy-to-break structure is positioned outside the needle seat part.

Preferably, the bottom section forming die is provided with a first annular cutting edge part; and (3) closing the bottom section forming die, and forming a first thickness-reducing annular notch matched with the first annular cutting edge part on the extrusion molding blank pipe.

Preferably, in the fourth step, the vacuum suction pipe extends into the lower section of the top sleeve from top to bottom, the end face of the vacuum suction pipe abuts against the lug part to form sealing, and the vacuum suction pipe is communicated with the vacuum pump; the side wall of the top of the vacuum suction pipe is also provided with a vent hole, the work of the vacuum pump is stopped after the piston is abutted against the end face of the top end of the main body part, outside air enters the vacuum suction pipe through the vent hole, so that the air pressure in the vacuum suction pipe is recovered to be normal, at the moment, the inside of the main body part is in a vacuum state, and the piston push rod assembly is sucked into the main body part until the top surface of the piston is completely contacted with the medicine due to the air pressure difference between the inside of the main body part and the outside.

Preferably, the middle section forming die is provided with a second annular cutting edge part; the vacuum suction pipe is pressed on the lug part to form a second thickness-reduced annular notch matched with the first annular cutting edge part on the bottom surface of the lug part.

Preferably, a medicine injection tube is installed in the vacuum suction tube, a control valve is installed on the medicine injection tube, and medicines are added into the main body part through the medicine injection tube.

Preferably, the vacuum sucker is internally provided with a grasping assembly, the grasping assembly can grasp a piston push rod assembly arranged in the medicine injection tube, and the grasping assembly can also release the piston push rod assembly.

Compared with the prior art, the manufacturing method of the injector with the medicine comprises the steps of installing the extrusion molding blank pipe on a mold, forming the extrusion molding blank pipe at different sectional mold positions into the needle sleeve, the needle head seat part, the main body part, the lug part and the top sleeve in an extrusion and blow molding mode, adding the medicine into the extrusion molding blank pipe in the forming process, and enabling the piston push rod assembly to enter the barrel body due to the air pressure difference in a vacuumizing mode, so that the formed injector is provided with the medicine and the piston push rod assembly; the EVOH layer is arranged in the extrusion molding blank tube, so that the whole injection syringe with the medicine after molding has EVOH layering, the external air can be effectively blocked, the barrel body is vacuumized before the medicine is added, the possibility of deterioration of the medicine due to contact with the air is reduced, and the quality guarantee period of the medicine is greatly prolonged; the needle sleeve, the top sleeve and the barrel form a sealed space, so that the medicine and the piston push rod assembly in the barrel are protected, annular notches are formed in the joint of the needle sleeve and the needle head seat portion and the joint of the top sleeve and the lug portion, the top sleeve and the needle sleeve can be rotated when the syringe is used, the top sleeve and the needle sleeve can fall off, the syringe is more convenient to use, the time is saved, and the medicine in the barrel can be effectively protected by the syringe with the medicine, and the overall operation efficiency can be greatly improved.

Drawings

Fig. 1 is an exploded view of a syringe with a drug.

Fig. 2 is a sectional view of the second step in the method of making the syringe with drug.

Fig. 3 is a sectional view of the third step in the manufacturing method of the syringe with medicine.

Fig. 4 is a sectional view of the fourth step in the manufacturing method of the syringe with medicine.

Fig. 5 is a sectional view II of the fourth step in the method of manufacturing the syringe with medicine.

Fig. 6 is a sectional view of the fifth step in the manufacturing method of the syringe with medicine.

The labels in the figure are: 1. a main body portion; 2. a push rod; 3. a needle tube portion; 4. a needle hub portion; 5. a lug portion; 6. a piston; 7. a needle sleeve; 8. jacking and sleeving; 9. a first annular lip portion; 10. a second annular lip portion; 11. forming a bottom section mould; 12. forming a middle section mould; 13. sealing the mold; 14. extruding a blank pipe; 15. a vacuum suction pipe; 16. a medicine injection tube; 17. a control valve; 18. a vent hole; 3a, a needle seat part.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

The first embodiment is as follows: as shown in figure 1, the syringe with the medicine comprises a barrel body, apush rod 2 and a needle head, wherein the barrel body comprises amain body part 1, a needlehead seat part 4 located at the front end of themain body part 1 and alug part 5 located at the rear end of themain body part 1, themain body part 1 is filled with the medicine, apiston 6 is installed in themain body part 1, one end of thepush rod 2 is connected with thepiston 6, and the other end of thepush rod 2 is located on the rear side of the barrel body.

The needle is fixedly connected with theneedle seat part 4, aneedle sleeve 7 is sleeved outside the needle, theneedle sleeve 7 is connected with theneedle seat part 4 into a whole, theneedle sleeve 7 is connected with theneedle seat part 4 through a first thickness reduction annular notch, and the first thickness reduction annular notch is used for reducing the wall thickness of the joint of theneedle sleeve 7 and theneedle seat part 4; the other end of thepush rod 2 is sleeved with atop sleeve 8, thetop sleeve 8 is connected with thelug part 5 into a whole, thetop sleeve 8 is connected with thelug part 5 through a second thickness-reducing annular notch, and the second thickness-reducing annular notch is used for reducing the wall thickness of the joint of thetop sleeve 8 and thelug part 5; a sealed space is formed among theneedle sleeve 7, the barrel body and thetop sleeve 8 to protect the medicine in the barrel body, and thetop sleeve 8 can also protect the piston push rod assembly from being pushed by external force to prevent the piston push rod assembly from being forced to extrude the medicine forwards.

In the in-service use process, rotateapical cap 8 andneedle cover 7 earlier, because the junction ofneedle cover 7 and syringeneedle seat portion 4 and the junction ofapical cap 8 andlug part 5 all have the annular recess that reduces thickness, makeapical cap 8 andneedle cover 7 easily receive the manpower influence to drop, just can carry out injection work after taking awayapical cap 8 andneedle cover 7.

A manufacturing method of an injector with medicine is sequentially carried out according to the following steps: the first step is as follows: the extrudedraw pipe 14 is mounted on the die; the second step is that: installing a needle head; the third step: blow molding; the fourth step: adding medicine and installing a piston push rod assembly; the fifth step: sealing and forming; and a sixth step: and (5) opening the mold.

The first step is as follows: the extrudedraw pipe 14 is mounted on the die; the die comprises a bottom section forming die 11, a middle section forming die 12, asealing die 13 and a blank tube clamping assembly, wherein an extrusion moldingblank tube 14 is firstly installed in a die cavity of the die, the blank tube clamping assembly is used for clamping the top section of the extrusion moldingblank tube 14 to fix the extrusion molding blank tube, and the top opening of the extrusion moldingblank tube 14 is in an open state at the moment.

The second step is that: installing a needle head; as shown in fig. 2, the needle head comprises aneedle tube part 3 and aneedle seat part 3a made of plastic, and a connecting groove is arranged on the outer side surface of theneedle seat part 3 a; the needle is firstly placed into the extrusion moldingblank pipe 14 from top to bottom, then the bottom section forming die 11 is matched with the die, the bottom section of the extrusion moldingblank pipe 14 is formed into theneedle sleeve 7 and theneedle seat portion 4 which are matched with the inner cavity of the bottom section forming die 11, theneedle seat portion 4 is wrapped on theneedle seat portion 3a, the connecting convex block corresponding to the connecting groove is formed on the inner wall of theneedle sleeve 7, and theneedle sleeve 7 is conveniently sleeved with theneedle seat portion 3a again after being separated.

In the second step, the bottom section forming die 11 is provided with a firstannular blade part 9, after the bottom section forming die 11 is closed, a first thickness-reducing annular notch matched with the firstannular blade part 9 is formed on the extrusion moldingblank pipe 14, and the first thickness-reducing annular notch is positioned on the outer side of theneedle seat part 3 a.

The third step: blow molding; as shown in fig. 3, the middle section forming die 12 is divided into a barrel forming die and atop sleeve 8 forming die, high-pressure gas is injected into the extrudedraw pipe 14, the middle section of the extrudedraw pipe 14 is expanded and formed into amain body portion 1 matched with the inner cavity of the barrel forming die and a lower section of thetop sleeve 8 matched with the inner cavity of thetop sleeve 8 forming die, and the extrudedraw pipe 14 corresponding to the position between the barrel forming die and thetop sleeve 8 forming die is expanded and formed into alug portion 5.

And in the third step, a middlesection forming die 12 is provided with a second annularcutting edge part 10, and after the middlesection forming die 12 is assembled, a second thickness-reducing annular notch matched with the second annularcutting edge part 10 is formed on the bottom surface of thelug part 5.

The fourth step: adding medicine and installing a piston push rod assembly; as shown in fig. 4, avacuum suction pipe 15 extends into the lower section of thetop sleeve 8 from top to bottom, so that the end surface of thevacuum suction pipe 15 abuts against and forms a seal with thelug part 5, thevacuum suction pipe 15 is communicated with a vacuum pump, the vacuum pump is turned on to form a vacuum state in themain body part 1 and thetop sleeve 8, amedicine injection pipe 16 is installed in thevacuum suction pipe 15, acontrol valve 17 is installed on themedicine injection pipe 16, and then thecontrol valve 17 is turned on to enable medicine to be added into themain body part 1 through themedicine injection pipe 16; thevacuum suction tube 15 is pressed against thelug part 5 to make the secondannular blade part 10 fully extrude thelug part 5, so as to avoid that the second thickness-reducing annular notch can not be formed.

As shown in fig. 5, a grasping assembly is further installed in thevacuum suction tube 15, the grasping assembly grasps the piston and push rod assembly, the piston and push rod assembly extends into the lower section of thetop sleeve 8 from top to bottom, thepiston 6 abuts against the top end face of themain body portion 1, avent hole 18 is further formed in the side wall of the top of thevacuum suction tube 15, then the vacuum pump stops working, outside air enters thevacuum suction tube 15 through thevent hole 18, the air pressure inside thevacuum suction tube 15 is recovered to be normal, at the moment, the inside of themain body portion 1 is in a vacuum state, the piston and push rod assembly is sucked into themain body portion 1 until the top face of thepiston 6 completely contacts with the medicine due to the air pressure difference between the inside of themain body portion 1 and the outside, and then the grasping assembly releases the piston and push rod assembly.

The fifth step: sealing and forming; as shown in fig. 6, the sealing die 13 is closed, the upper section of the extrudedparison 14 is formed into the upper section of thetop sleeve 8 which is matched with the closed cavity of the sealing die 13, the cavity of thetop sleeve 8 forms a closed cavity, and a sealed space is formed among theneedle sleeve 7, thetop sleeve 8 and the barrel.

And a sixth step: opening the mold; taking out the syringe with the medicine and removing the flash.

Example two: the structure and principle of the present embodiment are substantially the same as those of the first embodiment, and the substantially same parts are not described redundantly, but only different parts are described, and the different parts are: a syringe with medicine comprises a barrel body, apush rod 2 and a needle head, wherein the barrel body comprises amain body part 1, a needlehead seat part 4 positioned at the front end of themain body part 1 and alug part 5 positioned at the rear end of themain body part 1, the needle head is fixedly connected with the needlehead seat part 4, aneedle sleeve 7 is sleeved outside the needle head, theneedle sleeve 7 is connected with the needlehead seat part 4 into a whole, and theneedle sleeve 7 is connected with the needlehead seat part 4 through a first cutting dotted line; another tip cover ofpush rod 2 is equipped withtop cover 8, andtop cover 8 is even as an organic whole withlug portion 5, is connected through second cutting dotted line betweentop cover 8 and thelug portion 5.

A manufacturing method of an injector with medicine is sequentially carried out according to the following steps: the first step is as follows: the extrudedraw pipe 14 is mounted on the die; the second step is that: installing a needle head; the third step: blow molding; the fourth step: adding medicine and installing a piston push rod assembly; the fifth step: sealing and forming; and a sixth step: opening the mold; the seventh step: and (5) laser cutting.

The bottomsection forming die 11 in the second step does not have the firstannular lip portion 9, and the middlesection forming die 12 in the third step does not have the secondannular lip portion 10.

The seventh step: laser cutting; and after demoulding, laser cutting a first cutting dotted line at the joint of theneedle sleeve 7 and theneedle seat part 4, and laser cutting a second cutting dotted line at the joint of thetop sleeve 8 and thelug part 5.

Example three: the structure and principle of the present embodiment are substantially the same as those of the first embodiment, and the substantially same parts are not described redundantly, but only different parts are described, and the different parts are: the third step: plastic suction molding; themain body part 1 and the lower section of thetop sleeve 8 are formed by plastic suction.

Claims (10)

1. The utility model provides a syringe with medicine, including the barrel, push rod (2) and syringe needle, the barrel includes main part (1), be located syringe needle seat (4) of main part (1) front end and lug portion (5) that are located main part (1) rear end, the splendid attire has the medicine in main part (1), install piston (6) in main part (1), the one end of push rod (2) is connected with piston (6), the other end of push rod (2) is located the rear side of barrel, a serial communication port, the syringe needle is connected with syringe needle seat (4) fixed, the syringe needle overcoat is equipped with needle cover (7), needle cover (7) and syringe needle seat (4) are even as an organic whole, be connected through first easy fracture structure between needle cover (7) and syringe needle seat (4); the other end of the push rod (2) is sleeved with a jacking sleeve (8), the jacking sleeve (8) is connected with the lug part (5) into a whole, and the jacking sleeve (8) is connected with the lug part (5) through a second easily-broken structure.

2. The medicated syringe of claim 1 wherein the first frangible structure is a first reduced thickness annular recess for reducing the wall thickness at the junction of the needle hub (7) and the needle hub (4); or the first easy-breaking structure is a cutting dotted line positioned at the joint of the needle sleeve (7) and the needle seat part (4).

3. The medicated injector of claim 1, wherein the second breakable structure is a second reduced thickness annular recess for reducing the wall thickness at the junction of the top case (8) and the lug portion (5); or the second easily-broken structure is a cutting dotted line positioned at the joint of the reduced top sleeve (8) and the lug part (5).

4. A method of manufacturing a syringe with drug according to claim 1, 2 or 3, characterized in that the following steps are carried out in sequence:

the first step is as follows: mounting the extruded parison tube (14) on a die; the die comprises a bottom section forming die (11), a middle section forming die (12), a sealing die (13) and a parison tube clamping assembly, wherein the parison tube clamping assembly clamps a top section of an extrusion parison tube (14), the extrusion parison tube (14) is positioned in a die cavity of the die, and a top opening of the extrusion parison tube (14) is in an open state;

the second step is that: installing a needle head; firstly, the needle head is placed into an extrusion molding blank pipe (14) from top to bottom, then a bottom section forming die (11) is closed, the bottom section of the extrusion molding blank pipe (14) is formed into a needle sleeve (7) and a needle head seat part (4) which are matched with the inner cavity of the bottom section forming die (11), and the needle head seat part (4) is wrapped on the needle head;

the third step: blow molding or plastic molding; the middle section of the extrusion molding blank pipe (14) is expanded and formed into a main body part (1), a lug part (5) and a lower section of the top sleeve (8) which are matched with the inner cavity of the middle section forming die (12);

the fourth step: adding medicine and installing a piston push rod assembly; the medicine is added into the main body part (1) and the piston push rod assembly is arranged in the main body part (1) in sequence under the condition that the inner cavity of the main body part (1) is in a negative pressure state;

the fifth step: sealing and forming; closing the sealing die (13), forming the upper section of the extrusion molding parison tube (14) into the upper section of the top sleeve (8) matched with the closing inner cavity of the sealing die (13), wherein the inner cavity of the top sleeve (8) is a closed cavity;

and a sixth step: opening the mold; taking out the syringe with the medicine and removing the flash.

5. The manufacturing method of the syringe with medicine according to claim 4, characterized in that the needle comprises a needle tube part (3) and a needle seat part (3 a) made of plastic, the needle seat part (4) is wrapped on the needle seat part (3 a); the first breakable structure is located outside the needle seat (3 a).

6. The manufacturing method of the syringe with medicine according to claim 4, characterized in that the bottom section forming die (11) has a first annular lip portion (9); and (3) closing the bottom section forming die (11), and forming a first thickness-reducing annular notch matched with the first annular cutting edge part (9) on the extrusion molding blank pipe (14).

7. The method for manufacturing the injector with medicine according to claim 4, characterized in that in the fourth step, a vacuum suction pipe (15) extends into the lower section of the top sleeve (8) from top to bottom, the end surface of the vacuum suction pipe (15) is abutted against the lug part (5) to form a seal, and the vacuum suction pipe (15) is communicated with a vacuum pump.

8. The method for manufacturing an injector with medicine according to claim 4, wherein the intermediate section forming die (12) has a second annular cutting edge portion (10); the vacuum suction pipe (15) is pressed on the lug part (5) to form a second thickness-reduced annular notch matched with the second annular cutting edge part (10) on the bottom surface of the lug part (5).

9. The method for manufacturing the syringe with medicine according to claim 4, wherein the vacuum suction tube (15) is provided with a medicine injection tube (16), the medicine injection tube (16) is provided with a control valve (17), and the medicine is added into the main body part (1) through the medicine injection tube (16).

10. The method of claim 4, wherein the vacuum suction tube (15) has a gripping assembly mounted therein, the gripping assembly being capable of gripping a plunger rod assembly disposed within the drug injection tube (16), the gripping assembly being further capable of releasing the plunger rod assembly.

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