CN219271788U - Injection syringe - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to an injector, wherein one end of a needle is provided with a puncture end, the other end of the needle is inserted into a first end of an injection cylinder, a needle cap is arranged on the outer side of the needle, and a cap opening end of the needle cap is sleeved on the outer peripheral side of the injection cylinder; a guide hole is arranged at the position of the top end of the needle cap, which is opposite to the needle head, the needle cap can move along the axial direction of the injection tube, and a locking mechanism for locking the needle cap and the injection tube is arranged between the needle cap and the injection tube; before use, the needle head is arranged in the needle cap, so that the needle head is prevented from being polluted or injuring human bodies by mistake before use; when the puncture needle is used, the puncture end of the needle head extends out of the needle cap from the guide hole by a certain length, and the length of the puncture end extending out of the needle cap is the puncture depth, so that a diabetic patient can conveniently control the puncture depth of the needle head; moreover, the needle head is guided and arranged in the guide hole, so that the needle head is prevented from bending in the puncturing process.

Description

Injection syringe

Technical Field

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

Background

At present, the incidence rate of diabetes rises year by year, wherein type II diabetes is mostly treated by diet control and medicines so as to control the blood sugar level to be close to a normal value, and the occurrence of complications can be slowed down; type I diabetics must control blood glucose by injecting insulin. Insulin is a protein and is currently administered to the human body by syringe injection.

Insulin is injected subcutaneously to ensure its stable absorption, so that the depth of needle penetration is a requirement during insulin injection; if the needle is inserted too deeply into the muscle layer, the pain of injection is increased, and the absorption of insulin is accelerated, so that the blood sugar control is unstable; if the injection depth is too shallow, only the epidermis is reached, which in turn leads to insulin exudation and possibly pain or immune response.

Insulin is injected into the patients with diabetes every day, so that most patients inject the insulin by themselves, and the inserting needle force and the force application direction are controlled in the injection process to control the inserting depth of the needle. Specifically, the insulin injection is ensured by adopting ampoule bottles made of hard neutral glass, so that the injection is conveniently sucked from the ampoule bottles, and the needle heads of the injectors are designed longer, so that the application direction of force is required to be ensured to be parallel to the axial direction of the needle heads in the injection process of diabetics, the needle heads are prevented from bending in the skin penetrating process, and meanwhile, the diabetics also need to master the application force in the injection process, so that the proper penetration depth of the needle heads is ensured.

However, it is difficult for diabetics to accurately grasp the force of the needle during insulin injection, resulting in difficulty in reaching the desired site for the depth of insertion of the needle when the patient inserts the needle into the skin; and the length of the needle is longer, so that the needle is easy to bend due to the fact that the force application direction is different from the axis of the needle in the process of puncturing.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: in the process of insulin injection, a diabetic patient is difficult to accurately master the needle inserting force, so that the needle penetration depth is difficult to control; the needle is longer, resulting in the needle being prone to bending during penetration.

In order to solve the technical problems, an object of the present utility model is to provide an injector, including a syringe, a needle and a needle cap, wherein one end of the needle has a piercing end, the other end of the needle is inserted into a first end of the syringe, the needle cap is covered on the outer side of the needle, a cap opening end of the needle cap is sleeved on the outer circumference side of the syringe, a guide hole for guiding the piercing end of the needle to pass through is provided at a position of the cap top end of the needle cap opposite to the needle, and the needle cap can move along the axial direction of the syringe; a locking mechanism for locking the needle cap and the injection cylinder is arranged between the needle cap and the injection cylinder.

Preferably, the locking mechanism comprises an external thread arranged on the outer side of the injection cylinder and an internal thread arranged on the inner side of the cap opening end, and the internal thread is matched with the external thread;

the syringe, the needle cap, the needle head and the guide hole are all coaxially arranged.

Preferably, an annular flange protruding inwards in the radial direction of the needle cap is arranged on the inner side of the cap opening end, and the internal thread is arranged on the inner side of the annular flange.

As a preferable scheme, the inner side of the cap opening end is provided with a groove at the middle part of the internal thread, a rubber piece is embedded in the groove, and one end of the rubber piece, which faces the inner side of the needle cap, is elastically abutted to the external thread.

Preferably, the groove is annular, the rubber piece is a rubber ring matched with the groove, the outer side of the rubber ring is embedded in the groove, and the inner side of the rubber ring is elastically abutted to the external thread.

As a preferable scheme, the outer side of the puncture end of the needle head is provided with a scale mark.

Preferably, a sealing film is attached to the outer side of the top end of the needle cap, and the sealing film is covered on the guide hole.

Preferably, the needle cap is made of transparent plastic.

Preferably, the locking mechanism comprises a fastening screw and a threaded hole arranged at the end of the cap opening, the threaded hole is arranged along the radial direction of the end of the cap opening, and the threaded end of the fastening screw penetrates through the threaded hole and is abutted with the outer side wall of the injection cylinder.

Preferably, the outer side wall of the injection cylinder is provided with a plurality of positioning grooves which are arranged at intervals along the axial direction of the injection cylinder, and the end part of the fastening screw is abutted with the groove wall of one of the positioning grooves.

Compared with the prior art, the utility model has the beneficial effects that:

the injector comprises an injection tube, a needle head and a columnar needle cap, wherein one end of the needle head is provided with a puncture end, the other end of the needle head is inserted into the first end of the injection tube, the needle cap is covered on the outer side of the needle head, and the cap opening end of the needle cap is sleeved on the outer peripheral side of the injection tube; the needle cap can move along the axial direction of the injection cylinder, and a locking mechanism for locking the needle cap and the injection cylinder is arranged between the needle cap and the injection cylinder, so that the position between the needle cap and the injection cylinder can be locked; before use, the needle head is arranged in the needle cap, so that the needle head is prevented from being polluted or injuring human bodies by mistake before use; when the puncture needle is used, the puncture end of the needle head extends out of the needle cap from the guide hole by a certain length, and the length of the puncture end extending out of the needle cap is the puncture depth, so that a diabetic patient can conveniently control the puncture depth of the needle head; in addition, the needle head is guided and arranged in the guide hole, and the guide hole can apply radial constraint force to the side wall of the needle head, so that the needle head is prevented from bending in the puncturing process; therefore, the injector is convenient for diabetics to control the puncture depth, and can avoid the bending of the needle head in the puncture process.

Drawings

FIG. 1 is a schematic view of the structure of the syringe of the present utility model prior to use;

FIG. 2 is a schematic view of the structure of the syringe of the present utility model when drawing an injection;

FIG. 3 is a schematic view of the structure of the inventive injector during penetration;

FIG. 4 is a schematic view of the structure of the inventive syringe after penetration;

FIG. 5 is a schematic view of the structure when the locking mechanism is provided as a set screw;

in the figure, 1, a syringe; 11. a needle cylinder; 111. a positioning groove; 12. a piston; 13. a piston rod; 2. a needle cylinder; 3. a needle cap; 31. a guide hole; 32. an annular flange; 321. a groove; 33. a rubber member; 34. a threaded hole; 4. a sealing film; 5. and (5) fastening a screw.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the utility model.

As shown in fig. 1 to 4, an injector according to an embodiment of the present utility model includes a syringe 1, a needle 2, and a columnar needle cap 3, wherein one end of the needle 2 has a piercing end, the other end of the needle 2 is inserted into the first end of the syringe 1, the needle cap 3 is covered outside the needle 2, the cap opening end of the needle cap 3 is sleeved on the outer peripheral side of the syringe 1, a guide hole 31 through which the piercing end of the needle 2 is guided is provided at a position of the cap top of the needle cap 3 opposite to the needle 2, and the needle cap 3 is movable along the axial direction of the syringe 1; a locking mechanism for locking the needle cap 3 and the injection tube 1 is arranged between the needle cap 3 and the injection tube 1.

Specifically, as shown in fig. 1, the injection cartridge 1 comprises a cylinder 11, a piston 12 and a piston rod 13, and the cap opening end of the needle cap 3 is sleeved on the outer peripheral side of the cylinder 11; before use, the needle head 2 is arranged in the needle cap 3, so that the needle head 2 is prevented from being polluted or injuring a human body by mistake before use; as shown in fig. 2, when the needle head 2 is used for extracting injection, the needle cap 3 is moved towards the direction close to the needle cylinder 11, so that the inner wall of the cap top end of the needle cap 3 is moved to be attached to the end part of the needle cylinder 11, and the needle head 2 is fully extended out of the needle cap 3, thereby being convenient for the needle head 2 to suck the injection from an ampoule bottle; after the injection is completely sucked into the needle cylinder 11, as shown in fig. 3, the needle cap 3 is moved in a direction away from the needle cylinder 11, so that the puncture end of the needle head 2 extends out of the needle cap 3 by a certain length from the guide hole 31, the length of the puncture end extending out of the needle cap 3 is the puncture depth, which is convenient for diabetics to control the puncture depth of the needle head, and the needle head 2 is guided and arranged in the guide hole 31, and the guide hole 31 can apply radial constraint force to the side wall of the needle head 2, so that the needle head 2 is prevented from bending in the puncture process; after the insulin injection is finished, as shown in fig. 4, the needle cap 3 is moved away from the needle cylinder 11, so that the puncture end of the needle head 2 is retracted into the needle cap 3, and if the exposed needle head is pricked to the hand of a garbage disposal person, the garbage disposal person is injured, and even infectious diseases are transmitted; in the embodiment, the needle head 2 after use is retracted into the needle cap 3, so that the needle head 2 can be prevented from accidentally injuring garbage disposal personnel, and even causing disease transmission to the garbage disposal personnel; therefore, the injector is convenient for diabetics to control the puncture depth, can avoid the bending of the needle in the puncture process, and can avoid the accidental injury of the used needle 2 to garbage disposal personnel.

The locking mechanism comprises an external thread arranged on the outer side of the injection tube 1 and an internal thread arranged on the inner side of the cap opening end of the needle cap 3, and the internal thread is matched with the external thread; the injection tube 1, the needle cap 3, the needle head 2 and the guide hole 31 are all coaxially arranged, and the locking between the needle cap 3 and the needle cylinder 11 is realized by friction self-locking of a thread pair. Specifically, the inside of the cap mouth end is provided with an annular flange 32 protruding in the radial direction of the needle cap 3, the internal thread is provided inside the annular flange 32, and the annular flange 32 protrudes inward in the radial direction of the needle cap 3.

Further, a groove 321 is arranged at the position of the inner side of the cap opening end, which is positioned in the middle of the internal thread, a rubber piece 33 is embedded in the groove 321, and one end of the rubber piece 33, which faces the inner side of the needle cap 3, is elastically abutted with the external thread. The rubber member 33 is provided to increase the friction of the screw pair formed between the internal screw and the external screw, thereby improving the locking force between the cylinder 11 and the cap 3; moreover, the provision of the rubber member 33 does not affect the up-and-down movement between the cylinder 11 and the needle cap 3.

Further, the groove 321 is annular, the rubber member 33 is a rubber ring matched with the groove 321, the outer side of the rubber ring is embedded in the groove 321, and the inner side of the rubber ring is elastically abutted with the external thread. Thereby increasing the contact area between the rubber member 33 and the external thread.

Specifically, the inner diameter of the rubber ring is larger than the small diameter of the internal thread and smaller than the large diameter of the internal thread, the elasticity of the rubber ring is larger, when the external thread is in threaded connection with the internal thread, the needle cylinder 11 is arranged in the internal thread in a penetrating way, the large radial rubber ring of the external thread applies radial compression force, so that the inner hole of the rubber ring is increased, the inner side of the rubber ring is elastically abutted against the thread surface of the external thread, the friction force between the external thread and the internal thread is increased, and locking of a thread pair is realized; when the needle cap 3 needs to be moved, a user can move the needle cap 3 to other positions by overcoming the friction force between the internal thread and the external thread.

In this embodiment, the outer side of the piercing end of the needle 2 is provided with scale marks, so that the patient can accurately position the extending length of the needle 2.

In this embodiment, the outside subsides of the cap top of needle cap 3 are equipped with sealing membrane 4, and sealing membrane 4 lid is established on guiding hole 31, and sealing membrane can guarantee the leakproofness of syringe needle 2 before the storage environment of use, avoids syringe needle 2 to receive external pollution before the injection. Moreover, when in use, the sealing film 4 is punctured by the puncture end of the needle head 2, so that the use is convenient.

Wherein, the needle cap 3 is transparent plastic, and the transparent plastic is adopted to facilitate the user to observe the position of the needle head 2 in the using process.

In other embodiments of the present utility model, as shown in fig. 5, the locking mechanism includes a fastening screw 5 and a screw hole 34 provided at the cap end, the screw hole 34 being arranged in the radial direction of the cap end, the screw end of the fastening screw 5 passing through the screw hole 34 and abutting against the outer side wall of the syringe 1.

Further, the outer side wall of the syringe 1 is provided with a plurality of positioning grooves 111 arranged at intervals in the axial direction of the syringe 1, and the end of the fastening screw 5 abuts against the groove wall of one of the positioning grooves 111.

In summary, the syringe of the utility model, before using, the needle head 2 is set up in the needle cap 3, avoid the needle head 2 from being polluted or injuring the human body by mistake before using; when the needle head 2 is used for extracting injection, the needle cap 3 is moved towards the direction close to the needle cylinder 11, so that the inner wall of the cap top end of the needle cap 3 is moved to be attached to the end part of the needle cylinder 11, and the needle head 2 can conveniently extract the injection from the ampoule bottle; after the injection is completely sucked into the needle cylinder 11, the puncture end of the needle head 2 extends out of the needle cap 3 by a certain length from the guide hole 31, so that a diabetics can conveniently control the puncture depth of the needle head, in addition, the needle head 2 is arranged in the guide hole 31 in a guiding way, and the guide hole 31 can apply radial constraint force to the side wall of the needle head 2, so that the needle head 2 is prevented from bending in the puncture process; after the insulin injection is finished, the puncture end of the needle head 2 is retracted into the needle cap 3, so that the used needle head 2 can be prevented from injuring garbage clearance personnel by mistake.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (9)

1. The syringe is characterized by comprising a syringe barrel (1), a needle head (2) and a needle cap (3), wherein one end of the needle head (2) is provided with a puncture end, the other end of the needle head (2) is inserted into the first end of the syringe barrel (1), the needle cap (3) is covered on the outer side of the needle head (2), the cap opening end of the needle cap (3) is sleeved on the outer peripheral side of the syringe barrel (1), a guide hole (31) for the puncture end of the needle head (2) to guide and pass through is formed in the position, opposite to the needle head (2), of the cap top end of the needle cap (3), and the needle cap (3) can move along the axial direction of the syringe barrel (1); a locking mechanism for locking the needle cap (3) and the injection cylinder (1) is arranged between the needle cap (3) and the injection cylinder (1); the locking mechanism comprises an external thread arranged on the outer side of the injection cylinder (1) and an internal thread arranged on the inner side of the cap opening end, and the internal thread is matched with the external thread;

the injection tube (1), the needle cap (3), the needle head (2) and the guide hole (31) are all coaxially arranged.

2. Syringe according to claim 1, characterized in that the inside of the cap mouth end is provided with an annular flange (32) protruding radially of the needle cap (3), the internal thread being provided inside the annular flange (32).

3. The syringe according to claim 1, characterized in that a groove (321) is arranged at a position, located in the middle of the internal thread, of the inner side of the cap opening end, a rubber piece (33) is embedded in the groove (321), and one end, facing the inner side of the needle cap (3), of the rubber piece (33) is elastically abutted with the external thread.

4. A syringe according to claim 3, wherein the groove (321) is annular, the rubber member (33) is a rubber ring matched with the groove (321), the outer side of the rubber ring is embedded in the groove (321), and the inner side of the rubber ring is elastically abutted against the external thread.

5. Syringe according to claim 1, characterized in that the outside of the piercing end of the needle (2) is provided with graduation marks.

6. The syringe according to claim 1, characterized in that a sealing film (4) is attached to the outer side of the cap tip of the needle cap (3), and the sealing film (4) is covered on the guide hole (31).

7. Syringe according to claim 1, characterized in that the needle cap (3) is a transparent plastic.

8. The syringe according to claim 1, characterized in that the locking mechanism comprises a fastening screw (5) and a threaded hole (34) provided at the cap end, the threaded hole (34) being arranged in the radial direction of the cap end, the threaded end of the fastening screw (5) passing through the threaded hole (34) and abutting against the outer side wall of the syringe barrel (1).

9. The syringe according to claim 8, characterized in that the outer lateral wall of the syringe (1) is provided with a plurality of positioning grooves (111) arranged at intervals along the axial direction of the syringe (1), and the end of the fastening screw (5) abuts against the groove wall of one of the positioning grooves (111).

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