CN215653116U

CN215653116U - Injection device

Info

Publication number: CN215653116U
Application number: CN202120660462.1U
Authority: CN
Inventors: 王五星; 钟华钻; 王德忍
Original assignee: Shenzhen Antmed Co ltd
Current assignee: Shenzhen Antmed Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-01-28
Anticipated expiration: 2031-03-31

Abstract

The utility model discloses an injection device which comprises a needle cylinder and a push rod. A containing cavity is formed inside the needle cylinder, the needle cylinder is provided with two opposite ends, wherein one end of the needle cylinder is open, and the other end of the needle cylinder is provided with a liquid outlet communicated with the containing cavity; one end of the push rod extends into the containing cavity through the opening, the push rod is matched with the cavity wall of the containing cavity to form a limiting structure, and when the push rod moves relative to the needle cylinder, the limiting structure is used for limiting the separation of the push rod and the needle cylinder. The technical scheme of the utility model aims to improve the use safety of the injection device.

Description

Injection device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an injection device.

Background

The injection device comprises a puncture needle, a needle cylinder and a push rod, and is mainly used for clinical transfusion, vaccine injection, exhaust and other purposes. The prior injection device has various problems in clinical use, for example, a limit structure is not arranged between the push rod and the syringe, so that when liquid medicine is sucked, the push rod is separated from the syringe easily due to too fast pulling or too large force application on the back side of the push rod, and the injection device is unsafe to use.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide an injection device, which aims to improve the safety of the use of the injection device.

To achieve the above object, the present invention provides an injection device comprising:

the needle cylinder is internally provided with a containing cavity and is provided with two opposite ends, wherein one end of the needle cylinder is open, and the other end of the needle cylinder is provided with a liquid outlet communicated with the containing cavity; and

one end of the push rod extends into the containing cavity through the opening, the push rod is matched with the cavity wall of the containing cavity to form a limiting structure, and when the push rod moves relative to the needle cylinder, the limiting structure is used for limiting the separation of the push rod and the needle cylinder.

In an embodiment of the present invention, the limiting structure includes a clamping table and a limiting rib, one of the side wall surface of the push rod and the inner wall surface of the accommodating cavity is provided with the clamping table, the other of the side wall surface of the push rod and the inner wall surface of the accommodating cavity is provided with the limiting rib, and the clamping table is abutted against the limiting rib to limit the push rod to move towards a direction away from one end of the liquid outlet.

In an embodiment of the present invention, the limiting rib is convexly disposed on an inner wall surface of the accommodating cavity, the limiting rib is disposed at an end close to the opening, the side wall surface of the push rod is provided with the clamping table, and the clamping table is disposed at an end of the push rod close to the liquid outlet.

In an embodiment of the present invention, the limiting rib is disposed around the radial direction of the cavity.

In an embodiment of the present invention, the limiting ribs are multiple segments arranged at intervals, or the limiting ribs are annularly arranged.

In an embodiment of the utility model, the cross section of the limiting rib is arc-shaped, and the minimum inner diameter of the limiting rib is smaller than the outer diameter of the clamping table.

In an embodiment of the present invention, the volume of the cavity is 1 ml.

In an embodiment of the present invention, the injection device further includes a puncture assembly, the puncture assembly is detachably connected to the needle cylinder and is connected to an end of the needle cylinder, where the liquid outlet is disposed, and the puncture assembly is further communicated with the liquid outlet.

In an embodiment of the present invention, the puncture assembly includes a puncture needle and a base, the base is detachably connected to the needle cylinder through a connecting cylinder, and the puncture needle is fixedly connected to the base and is communicated with the liquid outlet.

In an embodiment of the present invention, a side wall surface of the base is provided with a first thread, a side wall surface of the syringe is provided with a second thread, and the first thread is engaged with the second thread;

or the side wall surface of the needle cylinder is provided with a buckling position, the side wall surface of the base is provided with a buckle, and the buckle is matched with the buckling position.

The injection device in the technical scheme of the utility model comprises a needle cylinder and a push rod. Wherein, the inside appearance chamber that is used for the holding liquid medicine that is formed with of cylinder, the one end of cylinder is the opening setting, and the other end is equipped with the liquid outlet with holding the chamber intercommunication, and wherein, the pjncture needle can be connected to the one end of liquid outlet. The push rod can stretch into the containing cavity through the opening end of the push rod, and the push rod is matched with the inner wall surface of the containing cavity to form a limiting structure. During the use, the push rod drives the piston and moves towards the one end of keeping away from the liquid outlet to inhale the inside that leads the appearance chamber with the liquid medicine, inhale to holding the chamber after the liquid medicine is complete, at this moment, limit structure can restrict the push rod and continue to move relatively the cylinder, so that avoid push rod and cylinder separation, in order to promote injection device's security. Compared with the injection device in the prior art, the injection device in the technical scheme of the utility model has safe use and is beneficial to clinical popularization and use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an injection device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the injection device of FIG. 1;

FIG. 3 is a cross-sectional view of the injection device of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Injection device	20	Push rod
10	Needle cylinder	21	Card table
				11	Main cylinder	23	Fixing column
111	Containing chamber	231	Limiting table
				113	Opening of the container	30	Piston
115	Spacing rib	31	Main body part
				13	Conical cylinder	311	Fixing hole
131	Conical cavity	313	Extrusion strip
				133	Liquid outlet	33	Extension part
15	Connecting cylinder	40	Base seat
				151	Buckling position	41	Buckle
17	Handle (CN)

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides an injection device 100.

Referring to fig. 1 to 4, an injection device 100 according to an embodiment of the present invention includes:

the syringe 10, a cavity 111 is formed inside the syringe 10, the syringe 10 has two opposite ends, wherein one end of the syringe 10 is provided with an opening 113, and the other end is provided with a liquid outlet 133 communicated with the cavity 111; and

one end of the push rod 20 extends into the cavity 111 through the opening 113, a limit structure (not shown) is formed by matching the push rod 20 and the cavity wall of the cavity 111, and the limit structure is used for limiting the separation of the push rod 20 and the syringe 10 when the push rod 20 moves relative to the syringe 10.

The injection device 100 according to the present invention includes a syringe 10 and a plunger 20. Wherein, the inside appearance chamber 111 that is used for holding the liquid medicine that is formed with of cylinder 10, the one end of cylinder 10 is opening 113 and sets up, and the other end is equipped with the liquid outlet 133 with holding chamber 111 intercommunication, and wherein, the pjncture needle can be connected to one end of liquid outlet 133. The push rod 20 can extend into the cavity 111 through the opening 113 end of the push rod 20, and the push rod 20 is further matched with the inner wall surface of the cavity 111 to form a limiting structure. During the use, push rod 20 drives piston 30 and moves towards the one end of keeping away from liquid outlet 133 to inhale the inside that holds chamber 111 with the liquid medicine, after the liquid medicine inhales to holding chamber 111 completely, at this moment, limit structure can restrict push rod 20 and continue to move relatively cylinder 10, so that avoid push rod 20 and cylinder 10 to separate, in order to promote injection device 100's security. Compared with the injection device 100 in the prior art, the injection device 100 in the technical scheme of the utility model has safe use and is beneficial to clinical popularization and use.

It should be noted that, compared with the injection device 100 in the existing scheme, the injection device 100 in the technical scheme of the present invention has the advantages of safe use, no waste of liquid medicine, and the like, and is beneficial to clinical popularization and use. It is understood that the injection device 100 of an embodiment of the present invention may be used for injection of various vaccines, such as new coronary pneumonia vaccine, other infectious disease vaccine, and the like.

Further, the injection device 100 further includes a piston 30, the piston 30 is disposed in the cavity 111 and connected to the push rod 20, and the piston 30 may be made of rubber or soft material such as silica gel. The piston 30 abuts against a side wall surface of the receptacle 111 to seal the opening 113.

Specifically, the piston 30 includes a main body portion 31 and an extension portion 33 connected to each other, wherein the main body portion 31 is provided with a fixing hole 311, the end portion of the push rod 20 is provided with a fixing column 23, and the fixing column 23 is inserted into the fixing hole 311, so as to fix the piston 30 to the end portion of the push rod 20. Further, the end of the fixing column 23 is further provided with a limiting table 231, and the outer diameter of the limiting table 231 is larger than that of the fixing column 23, so that the piston 30 is limited from moving relative to the push rod 20. The surface of the body 31 is further protruded with an extrusion strip 313 to increase the contact area of the piston 30 with the cylinder 10, thereby improving the sealability of the piston 30 with the cylinder 10.

The needle cylinder 10 comprises a conical cylinder 13 and a main cylinder 11 which are connected, wherein a containing cavity 111 is formed inside the main cylinder 11, a conical cavity 131 is formed inside the conical cylinder 13, the conical cavity 131 is communicated with the containing cavity 111, and a liquid outlet 133 is formed in the end part, far away from the main cylinder 11, of the conical cylinder 13. The extension of the piston 30 can extend into the tapered cavity 131 to push out the liquid medicine retained in the tapered cavity 131 to the liquid outlet 133. Near one end, the main cylinder 11 is further provided with a handle 17 at the end away from the liquid outlet 133, so that the user can hold the injection device 100 by hand, and the use convenience of the injection device is improved.

Referring to fig. 2, in an embodiment of the present invention, the limiting structure includes a clamping table 21 and a limiting rib 115, the clamping table 21 is disposed on one of a side wall surface of the push rod 20 and an inner wall surface of the accommodating cavity 111, the limiting rib 115 is disposed on the other of the side wall surface of the push rod 20 and the inner wall surface of the accommodating cavity 111, and the clamping table 21 abuts against the limiting rib 115 to limit the push rod 20 to move toward a direction away from the liquid outlet 133.

In the technical solution of an embodiment of the present invention, the limiting structure has various forms, for example, the limiting rib 115 may be matched with the clamping table 21, for example, the limiting rib 115 may be disposed on the push rod 20, or may be disposed on an inner wall surface of the cavity 111, and similarly, the clamping table 21 may also be disposed on the push rod 20 or on an inner wall surface of the cavity 111, as long as the limiting rib 115 and the clamping table 21 can be abutted to each other, so as to limit the push rod 20 from being separated from the main cylinder 11.

Further, in an embodiment, a limiting rib 115 may be protruded on an inner wall surface of the accommodating cavity 111, the limiting rib 115 is further disposed near the opening 113, a side wall surface of the push rod 20 is provided with a clamping table 21, and the clamping table 21 is disposed near an end of the push rod 20. Thus, when the end of the plunger 20 is close to the opening 113 of the syringe 10 during the liquid suction operation, the stopper 21 abuts against the stopper rib 115 to limit the abutment of the plunger 20, thereby restricting the separation of the plunger 20 from the syringe 10. Further, the limiting structure is not limited to the form of the limiting boss and the limiting rib 115, and may be the matching between the limiting member and the cavity 111, and the like, and is not limited herein.

Referring to fig. 3 and 4, in an embodiment of the present invention, the limiting rib 115 is circumferentially disposed along a radial direction of the receiving cavity 111.

In the technical solution of an embodiment of the present invention, the limiting rib 115 is arranged to extend along the radial direction of the cavity 111. Specifically, the limiting rib 115 may be a whole circle around the radial direction of the cavity 111, or may be a plurality of segments of limiting ribs 115 arranged at intervals, as long as the limiting rib 115 can abut against the clamping table 21 to limit the separation of the plunger 20 from the syringe 10, which is not limited herein. Specifically, the cross section of the limiting rib 115 is also arc-shaped, so that the processing difficulty of the needle cylinder 10 can be reduced, and the rotating and matching difficulty of the push rod 20 and the needle cylinder 10 can also be reduced. The minimum inner diameter of the limiting rib 115 is smaller than the outer diameter of the clamping table 21, so that the limiting rib 115 can prevent the limiting boss from moving.

Referring to fig. 1, in an embodiment of the present invention, the volume of the cavity 111 is 1 ml.

In the technical solution of an embodiment of the present invention, the volume of the injection device 100 is smaller and is 1 ml, and the structure of the piston 30 is improved to a structure including the main body portion 31 and the extending portion 33, so that the piston 30 can push all the liquid medicine in the cavity 111 to the liquid outlet 133, and the liquid medicine is completely sent out through the liquid outlet 133, thereby avoiding that a part of the liquid medicine stays in the cavity 111 and waste of the liquid medicine is caused. The liquid medicine is not wasted, so that the vaccine can be completely injected into the body of a user, and the epidemic prevention effect of the vaccine is ensured. Further, the main cylinder 11 may be transparent to facilitate observation of the amount of the liquid in the cavity 111 and operation of medical workers. Furthermore, the surface of the main cylinder 11 is provided with volume graduation lines to further help the medical work observe the residual medicament in the volume

Referring to fig. 1 and 2, in an embodiment of the present invention, the injection device 100 further includes a piercing assembly (not labeled), the piercing assembly is detachably connected to the cylinder 10 and is connected to an end of the cylinder 10 where the liquid outlet 133 is disposed, and the piercing assembly is further communicated with the liquid outlet 133.

In one embodiment of the present invention, the puncture assembly includes a base 40 and a puncture needle (not shown), wherein the base 40 and the puncture needle are an integral structure. The base 40 is a plastic material, the puncture needle is a metal material, and the puncture needle can be embedded into an integral structure in the injection molding process of the base 40. The lateral wall of base 40 is equipped with buckle 41, and the lateral wall of connecting cylinder 15 is equipped with detains position 151, and base 40 and the cooperation of buckle 41 realize base 40 and the removable of cylinder 10 to be connected between realization puncture subassembly and the cylinder 10.

Further, in one embodiment, the sidewall surface of the base 40 is further provided with a first thread (not shown) and the sidewall surface of the syringe 10 is provided with a second thread (not shown), the first thread and the second thread being engaged to allow the base 40 and the syringe 10 to be removably coupled.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An injection device, comprising:

2. The injection device as claimed in claim 1, wherein the limiting structure comprises a clamping table and a limiting rib, one of the side wall surface of the push rod and the inner wall surface of the accommodating cavity is provided with the clamping table, the other one of the side wall surface of the push rod and the inner wall surface of the accommodating cavity is provided with the limiting rib, and the clamping table is abutted against the limiting rib to limit the push rod to move towards one end of the push rod departing from the liquid outlet.

3. The injection device as claimed in claim 2, wherein the limiting rib is protruded from an inner wall surface of the cavity, the limiting rib is disposed at an end close to the opening, the clamping table is disposed on a side wall surface of the push rod, and the clamping table is disposed at an end of the push rod close to the liquid outlet.

4. The injection device as defined in claim 3, wherein said stopper rib is circumferentially disposed along a radial direction of said cavity.

5. The injection device as defined in claim 4, wherein said stopper rib is a plurality of segments arranged at intervals, or said stopper rib is arranged in a ring shape.

6. The injection device as claimed in claim 4, wherein the limiting rib has an arc-shaped cross section, and the minimum inner diameter of the limiting rib is smaller than the outer diameter of the clamping table.

7. The injection device as defined in claim 1, wherein said reservoir has a volume of 1 ml.

8. The injection device as claimed in any one of claims 1 to 7, further comprising a spike assembly removably connected to said barrel at an end thereof at which said liquid outlet is provided, said spike assembly further communicating with said liquid outlet.

9. The injection device as defined in claim 8, wherein said piercing assembly includes a piercing needle and a base, said base being removably connected to said barrel via a connector, said piercing needle being fixedly connected to said base and communicating with said liquid outlet.

10. The injection device as defined in claim 9, wherein a sidewall surface of said base is provided with a first thread, a sidewall surface of said barrel is provided with a second thread, and said first thread and said second thread are engaged;