CN213852528U

CN213852528U - Safety disposable syringe

Info

Publication number: CN213852528U
Application number: CN202021965909.8U
Authority: CN
Inventors: 郑晓波
Original assignee: Changzhou Huichun Medical Equipment Co ltd
Current assignee: Changzhou Huichun Medical Equipment Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-08-03
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to the technical field of syringes, in particular to a safe disposable syringe, which comprises a needle cylinder, a needle head, a piston, a core rod and a protective sleeve, wherein the protective sleeve is sleeved outside the needle head and is connected with the needle head in a sliding way, the protective sleeve is sleeved outside the needle head, a spring is arranged between the protective sleeve and the needle cylinder, so that the protective sleeve can automatically elastically stretch out and draw back, when liquid medicine is extracted from different medicine bottles, the protective sleeve can be directly propped against a bottle stopper of the liquid medicine, then the syringe is pushed towards the direction of the medicine bottles, the protective sleeve overcomes the elasticity of the spring and moves backwards relative to the needle head, the needle head pierces the medicine bottles to extract the liquid medicine, after the extraction is finished, the protective sleeve resets under the action of the spring, the needle head is re-protected at the outer side of the needle head, and the needle head can not touch other objects when the syringe is shaken, thereby effectively avoiding the situation that medical staff are stabbed by the needle head or the needle head is bent by other objects in the operation process, the safety performance is improved.

Description

Safety disposable syringe

Technical Field

The utility model belongs to the technical field of the syringe technique and specifically relates to a safe type disposable syringe.

Background

The injector is a common medical appliance, and consists of a syringe with a small hole at the front end, a piston matched with the syringe and a core rod, and is used for injecting a small amount of liquid or extracting the liquid or the liquid from an inaccessible area by other methods, sucking the liquid or gas from the small hole at the front end of the syringe when the core rod is pulled out, and extruding the liquid or gas when the core rod is pushed in, and is particularly used for intravenous injection of liquid medicine;

in order to prevent a needle from stabbing a person, a protective sleeve is directly sleeved outside the needle, before the syringe starts to inject liquid medicine to a patient, the protective sleeve needs to be removed to expose the needle at the front end of the syringe, then the liquid medicine in a plurality of different medicine bottles needs to be extracted into the syringe, the syringe is shaken to uniformly mix the liquid medicine in the medicine bottles, and then the injection is started to the patient; however, in the process of drawing liquid medicine from different medicine bottles and shaking the syringe to mix the liquid medicine therein uniformly, the needle of the syringe loses the protection of the protective sleeve, so that medical staff is easily stabbed by the needle or the needle is bent by other objects.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problems that in the prior art, when the injector extracts liquid medicines from different medicine bottles and shakes the injector to uniformly mix the liquid medicines in the injector, the needle head of the injector loses the protection of the protective sleeve, so that medical personnel are easily stabbed by the needle head or the needle head is bent by other objects, the safe disposable injector is provided.

The utility model provides a technical scheme that its technical problem adopted is: a safe disposable injector comprises a needle cylinder, a needle head, a piston, a core rod and a protective sleeve, wherein the piston is arranged in the needle cylinder in a sliding manner, the core rod is fixed on the piston, and the needle head is fixed at the front end of the needle cylinder and is communicated with the inside of the needle cylinder;

the utility model discloses a syringe needle, including syringe needle, protective sheath, syringe needle, protective sheath cover, syringe needle, protective sheath, syringe needle, protective sheath and syringe needle, the axis direction of syringe needle with the slip direction between protective sheath and the syringe needle is unanimous, the thin rear end of front end of syringe needle is thick, the rear end inner peripheral surface of protective sheath and the laminating of the rear end outer peripheral surface of syringe needle, the outer peripheral surface of cylinder is fixed with the support, be fixed with the guide bar on the support, the tail end fixing of protective sheath have the flange ring, set up on the flange ring with guide bar assorted arc hole, the guide bar passes the arc hole of flange ring, the front end threaded connection of guide bar has stop nut, the cover is equipped with the spring on the guide bar, the one end of spring is supported on the support, the other end is supported on the flange ring, the flange ring is located between stop nut and the spring, the syringe needle is whole to be located in the protective sheath.

Establish outside the syringe needle through protecting jacket cover in this scheme, and dispose the spring between protecting jacket and cylinder, it is flexible to make the protecting jacket can automatic elasticity, so that when extracting the liquid medicine in the follow different medicine bottles, can directly support the protecting jacket on the bottle plug of liquid medicine, then promote the syringe towards the medicine bottle direction, the relative syringe needle of elasticity that the spring was overcome to the protecting jacket moves backward, the syringe needle then pierces and extracts the liquid medicine in the medicine bottle, after the extraction is accomplished, the protecting jacket resets under the effect of spring, protect the outside at the syringe needle again, and ensure when rocking the syringe, other objects can not touched to the syringe needle, thereby effectually avoid in above-mentioned operation process that medical personnel are stabbed by the syringe needle or the syringe needle is bumped curved the condition emergence by other article, and the safety performance is improved, stop nut's setting then can prevent that the protecting jacket from coming off from the guide bar.

Furthermore, a bulge protrudes inwards from the inner peripheral surface of the rear end of the protective sleeve, a sliding groove is formed in the outer peripheral surface of the tail end of the needle head along the axis direction of the needle head, the bulge is located in the sliding groove, and when the protective sleeve slides backwards until the bulge is separated from the sliding groove, the front end of the needle head protrudes out of the protective sleeve; after all the required liquid medicines in the medicine bottles are extracted and the liquid medicines in the injector are uniformly mixed, the protective sleeve is moved backwards to enable the bulge on the protective sleeve to be separated from the sliding groove, then the protective sleeve is rotated to enable the bulge to abut against the rear end face of the needle head, and therefore the protective sleeve is positioned, the needle head is ensured to be exposed outside the protective sleeve, and the injection is conveniently carried out on a patient.

Further, the front end of the protective sleeve is provided with a conical section, and the front end of the conical section is small and the rear end of the conical section is large; the needle can be protected better.

Further, the rear end of the needle head is in threaded connection with the front end of the needle cylinder.

The utility model has the advantages that: the safety disposable syringe of the utility model is characterized in that the protective sleeve is sleeved outside the syringe needle, and the spring is arranged between the protective sleeve and the syringe cylinder, so that the protective sleeve can automatically and elastically stretch, so that the protective sleeve can be directly propped against the bottle stopper of the liquid medicine when the liquid medicine is extracted from different medicine bottles, then the injector is pushed towards the direction of the medicine bottle, the protective sleeve moves backwards relative to the needle head by overcoming the elasticity of the spring, the needle head pierces into the medicine bottle to extract the medicine liquid, after the extraction is finished, the protective sleeve is reset under the action of the spring and is protected outside the needle again, and the needle is ensured not to touch other objects when the injector is shaken, thereby effectual avoiding medical personnel to be stabbed by the syringe needle or the syringe needle is bumped curved condition by other article and takes place in above-mentioned operation process, improves the security performance, and stop nut's setting then can prevent that the protective sheath from droing from the guide bar.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of a safety single use syringe of the present invention;

FIG. 2 is an enlarged partial schematic view of A of FIG. 1;

FIG. 3 is a schematic side view of the safety single use syringe of the present invention;

FIG. 4 is a schematic view of the safety disposable syringe of the present invention with its protective sheath moved backward;

FIG. 5 is an enlarged partial schematic view of B in FIG. 4;

fig. 6 is a schematic view of the safety disposable syringe of the present invention, wherein the protrusion is abutted against the rear end face of the needle.

In the figure: 1. the device comprises a needle cylinder, 2, a needle head, 201, a sliding groove, 3, a piston, 4, a core rod, 5, a protective sleeve, 501, a flange ring, 5011, an arc-shaped hole, 502, a protrusion, 503, a conical section, 6, a support, 601, a guide rod, 7, a limiting nut, 8 and a spring.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1-6, a safety disposable injector comprises a syringe 1, a needle 2, a piston 3, a core bar 4 and a protective sleeve 5, wherein the piston 3 is slidably mounted in the syringe 1, the core bar 4 is fixed on the piston 3, and the needle 2 is fixed at the front end of the syringe 1 and is communicated with the inside of the syringe 1;

the utility model discloses a syringe needle, including syringe needle 2, protective sheath 5, syringe needle 2, the axis direction of syringe needle 2 and the slip direction between protective sheath 5 and the syringe needle 2 are unanimous, the thin rear end of front end of syringe needle 2 is thick, the rear end inner peripheral surface of protective sheath 5 and the laminating of the rear end outer peripheral surface of syringe needle 2, the outer peripheral surface of cylinder 1 is fixed with support 6, be fixed with guide bar 601 on the support 6, the tail end of protective sheath 5 end fixing has flange ring 501, set up on the flange ring 501 with guide bar 601 assorted arc hole 5011, guide bar 601 passes the arc hole 5011 of flange ring 501, the front end threaded connection of guide bar 601 has stop nut 7, the cover is equipped with spring 8 on the guide bar 601, the one end of spring 8 is supported on support 6, and the other end supports on flange ring 501, flange ring 501 is located between stop nut 7 and spring 8, the needle 2 is entirely located within the protective sheath 5.

A protrusion 502 protrudes inwards from the inner circumferential surface of the rear end of the protective sleeve 5, a sliding groove 201 is formed in the outer circumferential surface of the tail end of the needle head 2 along the axial direction of the needle head, the protrusion 502 is located in the sliding groove 201, and when the protective sleeve 5 slides backwards until the protrusion 502 is separated from the sliding groove 201, the front end of the needle head 2 protrudes out of the protective sleeve 5; after all the required liquid medicines in the medicine bottles are extracted and the liquid medicines in the injector are mixed uniformly, the protective sleeve 5 is moved backwards to enable the bulge 502 on the protective sleeve to be separated from the sliding groove 201, then the protective sleeve 5 is rotated to enable the bulge 502 to abut against the rear end face of the needle head 2, so that the protective sleeve 5 is positioned, and the needle head 2 is ensured to be exposed out of the protective sleeve 5, so that the injection can be carried out on a patient.

The front end of the protective sleeve 5 is provided with a tapered section 503, and the front end of the tapered section 503 is small and the rear end is large; a better protection of the needle 2 is obtained.

The rear end of the needle head 2 is in threaded connection with the front end of the needle cylinder 1.

In the embodiment, the protective sleeve 5 is sleeved outside the needle head 2, and the spring 8 is arranged between the protective sleeve 5 and the needle cylinder 1, so that the protective sleeve 5 can automatically and elastically stretch, so that when the liquid medicine is extracted from different medicine bottles, the protective sleeve 5 can be directly propped against the bottle stopper of the liquid medicine, then the injector is pushed towards the direction of the medicine bottle, the protective sleeve 5 overcomes the elasticity of the spring 8 and moves backwards relative to the needle head 2, the needle head 2 pierces into the medicine bottle to extract the medicine liquid, after the extraction is finished, the protective sleeve 5 is reset under the action of the spring 8, protects the outside of the needle 2 again, and ensures that when the syringe is shaken, the needle 2 does not touch other objects, therefore, the medical staff is effectively prevented from being stabbed by the needle head 2 or the needle head 2 is prevented from being bent by other objects in the operation process, the safety performance is improved, and the protective sleeve 5 can be prevented from falling off from the guide rod 601 due to the arrangement of the limiting nut 7;

after all the required liquid medicines in the medicine bottles are extracted and the liquid medicines in the injector are mixed uniformly, the protective sleeve 5 is moved backwards to enable the bulge 502 on the protective sleeve to be separated from the sliding groove 201, then the protective sleeve 5 is rotated to enable the bulge 502 to abut against the rear end face of the needle head 2, so that the protective sleeve 5 is positioned, and the needle head 2 is ensured to be exposed out of the protective sleeve 5, so that the injection can be carried out on a patient.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A safety type disposable syringe is characterized in that: the needle comprises a needle cylinder (1), a needle head (2), a piston (3), a core rod (4) and a protective sleeve (5), wherein the piston (3) is slidably mounted in the needle cylinder (1), the core rod (4) is fixed on the piston (3), and the needle head (2) is fixed at the front end of the needle cylinder (1) and is communicated with the interior of the needle cylinder (1);

the needle is characterized in that the protective sleeve (5) is sleeved outside the needle (2) and is in sliding connection with the needle (2), the axis direction of the needle (2) is consistent with the sliding direction between the protective sleeve (5) and the needle (2), the thin rear end of the front end of the needle (2) is thick, the inner peripheral surface of the rear end of the protective sleeve (5) is attached to the outer peripheral surface of the rear end of the needle (2), a support (6) is fixed to the outer peripheral surface of the needle cylinder (1), a guide rod (601) is fixed to the support (6), a flange ring (501) is fixed to the end of the tail end of the protective sleeve (5), an arc-shaped hole (5011) matched with the guide rod (601) is formed in the flange ring (501), the guide rod (601) penetrates through the arc-shaped hole (5011) of the flange ring (501), a limiting nut (7) is in threaded connection with the front end of the guide rod (601), and a spring (8) is sleeved on the guide rod (601), one end of the spring (8) is abutted on the support (6), the other end of the spring is abutted on the flange ring (501), the flange ring (501) is located between the limiting nut (7) and the spring (8), and the needle head (2) is completely located in the protective sleeve (5).

2. The safety single use syringe of claim 1, wherein: the inner peripheral surface of the rear end of the protective sleeve (5) protrudes inwards to form a protrusion (502), the outer peripheral surface of the tail end of the needle (2) is provided with a sliding groove (201) along the axis direction, the protrusion (502) is positioned in the sliding groove (201), and when the protective sleeve (5) slides backwards to the protrusion (502) to be separated from the sliding groove (201), the front end of the needle (2) protrudes out of the protective sleeve (5).

3. The safety single use syringe of claim 1, wherein: the front end of the protective sleeve (5) is provided with a tapered section (503), and the front end of the tapered section (503) is small and the rear end is large.

4. The safety single use syringe of claim 1, wherein: the rear end of the needle head (2) is in threaded connection with the front end of the needle cylinder (1).