CN212699941U

CN212699941U - Double-cavity automatic mixing injection device

Info

Publication number: CN212699941U
Application number: CN202021781458.2U
Authority: CN
Inventors: 范晓逶; 黄传伟; 刘学; 李斯伟; 冯雁峰; 郭剑; 李如华; 高艳艳; 孙中杰; 程亮
Original assignee: Institute of Pharmacology and Toxicology of AMMS
Current assignee: Institute of Pharmacology and Toxicology of AMMS; Academy of Military Medical Sciences AMMS of PLA
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-03-16
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses a double-cavity automatic mixing injection device, which comprises a shell, an injection part and a firing part, wherein the injection part and the firing part are arranged in the shell; a first cavity and a second cavity are arranged in the injection part, the first cavity and the second cavity are coaxially arranged, the diameter of the second cavity is larger than that of the first cavity, a first piston is arranged at the position, close to the second cavity, of the first cavity, a sealing plug is arranged at one side, far away from the first cavity, of the second cavity, and a needle head device is arranged at one side, far away from the second cavity, of the sealing plug; a push rod, a spring and a safety device are arranged in the percussion part; the first cavity is filled with liquid medicament, the second cavity is filled with liquid medicament or powder medicament, and the first piston separates the medicaments in the first cavity from the medicaments in the second cavity; the utility model discloses after safeties opens, the push rod wholly moves forward after promoting under the effect of spring, and the liquid medicament in the first cavity mixes with the second cavity to pour into through the syringe needle device. The utility model discloses a safe injection is mixed to two-chamber.

Description

Double-cavity automatic mixing injection device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a two-chamber automatic mixing injection device.

Background

The injection administration process involves risks and challenges from various aspects including mental or physical aspects of the user and the subject, and the use of an automatic injection needle simplifies the self-administration process, reduces patient anxiety, and improves safety, while the automatic needle designs the injection process as a standard motion to ensure that each injection is inserted to the proper depth and an accurate dose is administered. The administration mode is more controllable than manual injection administration, the process is continuous and smooth, and the compliance of the automatic needle is higher than that of manual injection.

Existing automatic injection devices, are only single vial designs, such as patent numbers: 201480048472.2, 201480048985.3, an autoinjector comprising: a housing adapted to hold a medicament container having a needle; a needle shield telescopically coupled to the housing and movable between a First Extended Position (FEP) relative to the housing, in which the needle is covered, and a Retracted Position (RP) relative to the housing, in which the needle is exposed; and a plunger rotatably and slidably disposed in the housing 41. The plunger is rotatable relative to the housing between a first rotational position in which the plunger is engaged to the housing and a second rotational position in which the plunger is disengaged from the housing. A needle shield is operably coupled to the plunger. The plunger rotates from the first rotational position to the second rotational position when the needle shield translates from the First Extended Position (FEP) to the Retracted Position (RP).

However, the above patent technologies cannot mix the medicines, and some medicines cannot be stored for a long time after being mixed, and need to be stored separately and mixed for use temporarily.

Accordingly, there is a need in the art for a dual chamber automatic mixing injection device.

Disclosure of Invention

In view of this, the utility model provides an easy operation, use convenient two-chamber automatic mixing injection device.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a double-cavity automatic mixing injection device comprises a shell, an injection part and a firing part, wherein the injection part and the firing part are arranged in the shell;

a first cavity and a second cavity are arranged in the injection part, the first cavity and the second cavity are coaxially arranged, the diameter of the second cavity is larger than that of the first cavity, a first piston is arranged at the position, close to the second cavity, of the first cavity, a sealing plug is arranged at one side, far away from the first cavity, of the second cavity, and a needle head device is arranged at one side, far away from the second cavity, of the sealing plug;

a push rod, a spring and a safety device are arranged in the firing part, the spring is sleeved on the push rod, one end of the push rod is provided with a second piston, and the second piston is in sealing sliding connection with the first cavity; a first through hole is formed in one end, far away from the second piston, of the inner side of the shell, a clamping jaw is arranged at the other end of the push rod, and the clamping jaw can penetrate through the first through hole and can be clamped on the outer edge of the first through hole; the safety device is connected to the end part of the shell, and an inserted rod is arranged on the safety device; the end of the housing is provided with a second through hole aligned with the first through hole, and when the safety device is connected to the end of the housing, the inserted rod of the safety device is inserted into the first through hole through the second through hole and forces the jaws to spread outwards and thus to be more tightly clamped to the outer edge of the first through hole;

the first cavity is internally provided with a liquid medicament, the second cavity is internally provided with a liquid medicament or a powder medicament, and the first piston enables the medicaments in the first cavity and the second cavity to be separated.

When the safety device is opened, the push rod pushes the sealing plug to move integrally forward under the action of the spring, the needle head device preferentially punctures the sealing plug to enable the sealing plug to be communicated with the second cavity, the spring continues to release elasticity, the second piston continues to be pushed to move towards the first cavity and drives the first piston to move towards the second cavity, liquid medicine in the first cavity is mixed with the second cavity, the spring continues to release elasticity, the second piston pushes the sealing plug end of the second cavity to move, and the mixed medicine is injected through the needle head device.

Further, a safety device is connected to the end of the housing by means of a screw connection or a snap connection.

Furthermore, the clamping jaws are four and four, and the clamping jaws are symmetrically arranged.

Further, the insertion rod includes a first thick portion received in the second through hole and a second thin portion closely interposed between the four jaws when the safety device is coupled to the end of the housing.

The utility model discloses because the last inserted bar that is provided with of safeties, when safeties is connected to the rear end of shell, the inserted bar passes the second through-hole of shell rear end and inserts the inboard first through-hole of shell to force the jack catch outwards to open and consequently block more closely arrives the outer edge of first through-hole, thereby play the guard action to this automatic injection device, only can arouse this automatic injection device after extracting safeties promptly, therefore avoided this automatic injection device by the condition of mistake arousing.

Furthermore, the one end of push rod is kept away from the jack catch is provided with the arch, the second piston towards the one end of push rod be provided with the protruding matched with recess of push rod front end, the push rod with the second piston passes through groove combination mode block.

Furthermore, be equipped with on the lateral wall of first piston along the logical groove that radially sets up, lead to the groove middle part degree of depth and be less than the both sides degree of depth, the shell inner wall corresponds lead to the groove middle part and be equipped with the fixture block, first piston seal joint with in the shell.

The first piston of the utility model is provided with the through groove, when the first piston and the first cavity generate a certain distance displacement under the action of the spring, the first piston is separated from the clamping block, a small amount of liquid medicament in the first cavity starts to enter the second cavity to be primarily mixed with the medicament in the second cavity, then the first piston is separated from the first cavity to enter the second cavity, the liquid medicament in the first cavity is secondarily mixed with the second cavity in a large amount, the mixing is more uniform,

furthermore, the needle device comprises a needle fixing shell in threaded connection with the shell, a guide sleeve arranged in the needle fixing shell, a needle and a telescopic sleeve;

the utility model discloses a syringe needle, including the shell, the uide bushing is equipped with the syringe needle set casing, the uide bushing one end is inserted and is located the shell inboardly, and the other end by the syringe needle set casing is fixed, the syringe needle is fixed to be worn to establish the middle part of uide bushing, the flexible cover with the uide bushing is kept away from one side of sealing the stopper fixed, and is used for holding the syringe needle, the syringe needle sets up the tip type for both ends, and its one end is located seal the front end of stopper.

Further, the anti-skid device further comprises an outer sleeve, the outer sleeve is sleeved outside the outer shell and the outer sleeve, and anti-skid grains are arranged on the outer side of the outer sleeve.

This embodiment makes the user hold the outer sleeve, reduces the landing scheduling problem, guarantees the convenient performance of use.

Drawings

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

Fig. 1 is a schematic view of the overall structure of a dual-chamber automatic mixing and injecting device of the present invention;

fig. 2 is an enlarged schematic view of a portion a of a dual chamber automatic mixing and injecting device of the present invention;

fig. 3 is a schematic diagram of a safety device of a dual chamber automatic mixing injection device of the present invention;

in the figure: 1 is a shell; 2 is a first cavity; 3 is a second cavity; 4 is a first piston; 5 is a sealing plug; 6 is a pillow device; 7 is a push rod; 8 is a spring; 9 is a safety device; 10 is a second piston; 11 is a first through hole; 21 is a second through hole; 71 is a claw; 91 is an insert rod; 911 is the first thick part; 912 is a second detail; 61 is a needle head fixing shell; 62 is a guide sleeve; 63 is a needle head; 64 is a telescopic sleeve; 100 is an outer sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3: the embodiment provides a double-cavity automatic mixing injection device, which comprises a shell 1, an injection part and a firing part, wherein the injection part and the firing part are arranged in the shell 1;

a first cavity 2 and a second cavity 3 are arranged in the injection part, the first cavity 2 and the second cavity 3 are coaxially arranged, the diameter of the second cavity 3 is larger than that of the first cavity 2, a first piston 4 is arranged at the position, close to the second cavity 3, of the first cavity 2, a sealing plug 5 is arranged at one side, far away from the first cavity 2, of the second cavity 3, and a needle head device 6 is arranged at one side, far away from the second cavity 3, of the sealing plug 5;

a push rod 7, a spring 8 and a safety device 9 are arranged in the triggering part, the spring 8 is sleeved on the push rod 7, a second piston 10 is arranged at one end of the push rod 7, and the second piston 10 is in sealing sliding connection with the first cavity 2; a first through hole 21 is formed in one end, far away from the second piston 10, of the inner side of the shell 1, a clamping jaw 71 is arranged at the other end of the push rod 7, and the clamping jaw 71 can penetrate through the first through hole 21 and can be clamped on the outer edge of the first through hole 21; the safety device 9 is connected to the end part of the shell 1, and the safety device 9 is provided with an insert rod 91; the end of the housing 1 is provided with a second through hole 11 aligned with the first through hole 21, and when the safety 9 is connected to the end of the housing 1, the plunger 91 of the safety 9 is inserted into the first through hole 21 through the second through hole 11 and forces the jaws 71 to spread outwardly and thus more tightly snap to the outer edge of the first through hole 21;

the first cavity 2 is filled with liquid medicament, the second cavity 3 is filled with liquid medicament or powder medicament, and the first piston 4 separates the medicaments in the first cavity from the medicaments in the second cavity.

After the safety device 9 is opened, the push rod 7 is pushed by the spring 8 to move forward integrally, the needle head device 6 firstly penetrates the sealing plug 5 to be communicated with the second cavity 3, the spring 8 continuously releases the elastic force to continuously push the second piston 10 to move towards the first cavity 2 and drive the first piston 4 to move towards the second cavity 3, the liquid medicament in the first cavity 2 is mixed with the second cavity 4, the spring 8 continuously releases the elastic force, the second piston 10 is pushed to move towards the sealing plug end 5 of the second cavity 4, and the mixed medicament is injected through the needle head device 6.

More specifically, the housing 1 is composed of two parts screwed together, the firing part occupying a portion and the injection part occupying a portion.

In this embodiment, the safety device 9 is screwed or engaged to the end of the housing 1.

In this embodiment, the number of the claws 71 is four, and the four claws 71 are symmetrically arranged.

In this embodiment, the insertion rod 91 includes a first thick portion 911 and a second thin portion 912, and when the safety device 9 is connected to the end of the housing 1, the first thick portion 911 is received in the second through hole 11 and the second thin portion 912 is closely inserted between the four jaws 71.

In the embodiment, the safety device 9 is provided with the inserted rod 7, when the safety device 9 is connected to the rear end of the housing 1, the inserted rod is inserted into the first through hole 21 on the inner side of the housing 1 through the second through hole 11 on the rear end of the housing 1, and the clamping jaws 71 are forced to be outwards opened and are accordingly clamped to the outer edge of the first through hole 21 more tightly, so that the automatic injection device is protected, namely, the automatic injection device can be activated only after the safety device 9 is pulled out, and the situation that the automatic injection device is activated by mistake is avoided.

In this embodiment, a protrusion is disposed at an end of the push rod 7 away from the claw 71, a groove matched with the protrusion at the front end of the push rod 7 is disposed at an end of the second piston 10 facing the push rod 7, and the push rod 7 and the second piston 10 are engaged with each other in a groove coupling manner.

In other embodiments, the push rod 7 and the second piston 10 may be fixed by screwing.

In this embodiment, be equipped with on the lateral wall of first piston 4 along the logical groove of radial setting, lead to the groove middle part degree of depth and be less than the both sides degree of depth, 1 inner wall of shell corresponds logical groove middle part and is equipped with the fixture block, first piston 4 sealed joint and shell 1 in.

In the embodiment, the through groove is arranged on the first piston 4, when a certain distance displacement is generated between the first piston 4 and the first cavity 2 under the action of the spring 8, the first piston 4 is separated from the fixture block, a small amount of liquid medicament in the first cavity 2 begins to enter the second cavity 3 to be primarily mixed with medicament in the second cavity 3, then the first piston 4 is separated from the first cavity 2 to enter the second cavity 4, the liquid medicament in the first cavity 2 is secondarily mixed with a large amount of liquid medicament in the second cavity 4, and the mixing is more uniform,

in this embodiment, the needle device 6 includes a needle fixing housing 61 screwed to the housing 1, a guide sleeve 62 disposed inside the needle fixing housing 61, a needle 63, and a telescopic sleeve 64;

one end of the guide sleeve 62 is inserted into the inner side of the outer shell 1, the other end of the guide sleeve is fixed by the needle fixing shell 61, the needle 63 is fixedly arranged in the middle of the guide sleeve 62 in a penetrating mode, the telescopic sleeve 64 and one side, far away from the sealing plug 5, of the guide sleeve 62 are fixed and used for containing the needle 63, the needle 63 is of a tip type, two ends of the needle are located at the front end of the sealing plug 5, and one end of the needle can penetrate through the sealing plug 5 to be in contact with the medicament in the second cavity 3.

In this embodiment, the outer sleeve 100 is further included, the outer sleeve 100 is sleeved outside the housing 1, and the outer side of the outer sleeve 100 is provided with anti-slip threads.

This embodiment enables a user to hold outer sleeve 100, reduces problems such as slipping, and ensures ease of use.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments.

Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The double-cavity automatic mixing injection device is characterized by comprising a shell (1), an injection part and a firing part, wherein the injection part and the firing part are arranged in the shell (1);

a first cavity (2) and a second cavity (3) are arranged in the injection part, the first cavity (2) and the second cavity (3) are coaxially arranged, the diameter of the second cavity (3) is larger than that of the first cavity (2), a first piston (4) is arranged at the position, close to the second cavity (3), of the first cavity (2), a sealing plug (5) is arranged at one side, far away from the first cavity (2), of the second cavity (3), and a needle device (6) is arranged at one side, far away from the second cavity (3), of the sealing plug (5);

a push rod (7), a spring (8) and a safety device (9) are arranged in the triggering part, the spring (8) is sleeved on the push rod (7), a second piston (10) is arranged at one end of the push rod (7), and the second piston (10) is in sealing sliding connection with the first cavity (2); a first through hole (21) is formed in one end, far away from the second piston (10), of the inner side of the shell (1), a clamping jaw (71) is arranged at the other end of the push rod (7), and the clamping jaw (71) can penetrate through the first through hole (21) and can be clamped on the outer edge of the first through hole (21); the safety device (9) is connected to the end part of the shell (1), and an insert rod (91) is arranged on the safety device (9); the end of the housing (1) is provided with a second through hole (11) aligned with the first through hole (21), when the safety device (9) is connected to the end of the housing (1), the insert rod (91) of the safety device (9) is inserted into the first through hole (21) through the second through hole (11) and forces the jaws (71) to spread outwards and thus to be more tightly snapped to the outer edge of the first through hole (21);

the first cavity (2) is filled with liquid medicament, the second cavity (3) is filled with liquid medicament or powder medicament, and the first piston (4) separates the medicaments in the first cavity from the medicaments in the second cavity.

2. A dual chamber automatic mixing and injection device according to claim 1 wherein the safety means (9) is attached to the end of the housing (1) by means of a screw or snap connection.

3. The dual chamber automatic mixing injection device according to claim 1 wherein said jaws (71) are four and four of said jaws (71) are symmetrically disposed.

4. A dual chamber automatic mixing injection device according to claim 3, characterized in that said plunger (91) comprises a first thick portion (911) and a second thin portion (912), said first thick portion (911) being housed in said second through hole (11) when said safety means (9) is connected to the end of said housing (1), said second thin portion (912) being tightly interposed between said four jaws (71).

5. The dual-chamber automatic mixing and injecting device according to claim 4, wherein a protrusion is disposed at an end of the push rod (7) away from the claw (71), a groove matched with the protrusion at the front end of the push rod (7) is disposed at an end of the second piston (10) facing the push rod (7), and the push rod (7) and the second piston (10) are engaged in a groove-engaging manner.

6. The dual-chamber automatic mixing and injecting device according to claim 1, wherein the sidewall of the first piston (4) is provided with a radially disposed through groove, the depth of the middle portion of the through groove is less than the depth of the two sides, the inner wall of the housing (1) is provided with a clamping block corresponding to the middle portion of the through groove, and the first piston (4) is clamped in the housing (1) in a sealing manner.

7. The dual chamber automatic mixing injection device of claim 1 wherein said needle assembly (6) comprises a needle mounting housing (61) threadably connected to said housing (1), a guide sleeve (62) disposed within said needle mounting housing (61), a needle (63) and a telescoping sleeve (64);

uide bushing (62) one end is inserted and is located shell (1) inboard, the other end by syringe needle set casing (61) is fixed, syringe needle (63) are fixed to be worn to establish the middle part of uide bushing (62), flexible cover (64) with uide bushing (62) are kept away from the one side of sealing stopper (5) and are fixed, and are used for holding syringe needle (63), syringe needle (63) set up the tip type for both ends, and its one end is located seal the front end of stopper (5), and can pierce through seal the medicament contact in stopper (5) and second cavity (3).

8. The dual chamber automatic mixing injection device according to any of claims 1 to 7, further comprising an outer sleeve (100), wherein the outer sleeve (100) is sleeved outside the housing (1) and the outer sleeve (100) has anti-slip threads on the outer side.