CN215024054U - Safety syringe - Google Patents

Abstract

The utility model relates to the technical field of medical syringes, in particular to a safety syringe. The injection needle protection device at least comprises a needle seat and a needle head protection device fixedly connected with the needle seat, wherein an injection needle is arranged on the needle seat, and the needle head protection device at least comprises a plug body, a sliding sleeve and a check piece; it is characterized in that an elastic buckle mechanism is arranged between the plug body and the needle base. The safety syringe of this embodiment, through elasticity buckle mechanism fixed connection between cock body and the needle file, has changed the form of current cementing, in the assembling process, only need the two press relatively can, assembly process is simpler, and the process is still less, and assembly efficiency is higher.

Description

Safety syringe

Technical Field

The utility model relates to the technical field of medical syringes, concretely relates to safety syringe.

Background

Disposable safety syringe is common medical instrument, in order to prevent syringe needle accidental injury user after the use and prevent syringe secondary use, this type of syringe is provided with needle protection device usually, covers the needle after using in order to prevent that the needle from accidental injury user, and this needle protection device still has the non return structure simultaneously to prevent that needle protection device from recovering to initial position again after covering the needle, thereby solve and prevent the problem of secondary use.

The utility model discloses a syringe needle protection device and safety syringe, its have simple structure, convenient operation, with low costs, the part that constitutes syringe needle protection device is less, convenient assembling, technical advantage such as avoiding the maloperation that chinese utility model patent with publication number CN111529825A discloses a syringe needle protection device.

However, there is still room for improvement, specifically as follows:

(1) the plug body and the needle seat in the needle head protection device are fixed in a gluing mode, a gluing process is needed in the fixing mode in the assembling process, and the plug body and the needle seat are quickly combined in a certain time after gluing, which is equivalent to two processes;

(2) in the process that the check piece is pushed out, continuous resistance exists between the rod-shaped body of the check piece and the elastic limiting piece of the plug body, so that the pushed-out hand feeling is poor;

(3) the opening direction of the through hole on the disc-shaped body is positioned on the side surface, so that the difficulty of processing the die is increased;

(4) when the sliding sleeve is pushed, the hand-push position on the sliding sleeve, which is in contact with fingers, is positioned at the approximate middle position of the sliding sleeve, and because the thickness of the sliding sleeve is limited, the radial height of the hand-push position is smaller, force application is inconvenient when the sliding sleeve is pushed;

(5) the tip of second sliding sleeve and patient direct contact is the plane, and it is relatively poor to press the in-process travelling comfort.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a structure improved generation's safety syringe to solve the technical defect among the prior art.

In order to solve the technical problem, the utility model provides a technical scheme as follows: the utility model provides a safety syringe, at least including the needle file and with needle file fixed connection's syringe needle protection device, be provided with the syringe needle on the needle file, syringe needle protection device includes cock body, sliding sleeve and non return spare at least, be provided with elasticity buckle mechanism between cock body and the needle file.

According to a preferred embodiment, a clamping groove is formed in one end, away from the needle point, of the needle seat, at least two penetrating grooves which axially extend from one side end face of the clamping groove and penetrate through the wall of the plug body are formed in the plug body, elastic arms are formed on the plug body wall between the adjacent penetrating grooves and provided with buckles which radially extend inwards and are matched with the clamping groove, and the elastic buckles, the buckles and the clamping groove form the elastic buckle mechanism.

In a preferred embodiment, the free end of the resilient arm is provided with a guiding cone.

In a preferred embodiment, the check member includes a disk-shaped body and at least one rod-shaped body connected to an edge of the disk-shaped body and extending axially toward one side of the disk-shaped body, the disk-shaped body is provided with a through hole, the through hole is provided with an opening, and the check member is symmetrical with respect to a symmetry plane of the rod-shaped body and a symmetry plane of the opening.

In a preferred embodiment, the plug body is provided with an elastic limiting part, and a limiting groove adapted to the elastic limiting part is arranged at a position, close to the disc-shaped body, of the inner side surface of the rod-shaped body of the check member.

In a preferred embodiment, the rod-shaped body is provided at an inner side thereof with a clearance groove adapted to the elastic stopper.

In a preferred embodiment, the outer wall of the sliding sleeve is provided with a convex part corresponding to the position of the check piece, the convex part axially extends to the end part of the sliding sleeve on the side far away from the injection needle, and the end part of the convex part forms a hand-push part.

In a preferred embodiment, the hand-push portion is provided with a hand-push slope.

In a preferred embodiment, the push inclined plane is provided with damping lines.

In a preferred embodiment, an end of the sliding sleeve close to the injection needle is provided with an arc-shaped end surface.

Compared with the prior art, the safety syringe of the embodiment has the following beneficial effects:

(1) the plug body and the needle seat are fixedly connected through the elastic buckle mechanism, the existing gluing mode is changed, only the two are needed to be pressed relatively in the assembling process, the assembling process is simpler, the processes are fewer, and the assembling efficiency is higher.

(2) The non-return piece is designed into a symmetrical structure, and compared with an asymmetrical structure in the prior art, the non-return piece has the advantages that after the non-return piece is pushed out, the opening side is directly coated with the needle tube and does not topple to two sides, and the supporting effect is better; and secondly, the symmetrical structure enables the die to be more convenient to process and facilitates the feeding of the assembling machine.

(3) The clearance groove is arranged on the inner side of the rod-shaped body of the check piece, and in the process that the check piece is pushed out, the resistance of the elastic limiting piece in the clearance groove can be almost ignored, so that the force required to be applied in the pushing-out process is smaller, and the experience is better.

(4) The hand-pushing part is arranged at the end part of the convex part corresponding to the check piece, and the radial height of the hand-pushing part is larger, so that an operator can apply pushing force more conveniently.

(5) The one end that the sliding sleeve is close to the syringe needle is provided with the arc terminal surface, and is contacting and pressing the in-process with patient's skin, and patient's travelling comfort is better.

Drawings

FIG. 1 is a schematic view of the external structure of the safety syringe of the present embodiment;

FIG. 2 is a schematic structural view of the safety syringe hidden needle protection device according to the present embodiment;

FIG. 3 is a schematic structural diagram of the plug body of the present embodiment;

FIG. 4 is a schematic sectional view of the connection state of the stopper body and the needle holder in the present embodiment;

FIG. 5 is a schematic cross-sectional structural view of the needle protection device in the safety syringe of the present embodiment;

FIG. 6 is a perspective view of the check member in the present embodiment;

fig. 7 is a side view of the check member in the present embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

A safety syringe according to the present embodiment, as shown in fig. 1 and 2, includes a barrel 40, a needle holder 50 is provided at a front end of the barrel 40, and an injection needle 60 is mounted on the needle holder 50. The front end of the syringe is provided with a needle head protection device sleeved outside the needle seat and the injection needle, and the needle head protection device has the functions of preventing the injection needle after use from accidentally stabbing users and preventing the safe injector from being used for the second time.

The needle protecting device of the present embodiment, as shown in fig. 5, includes a plug 10, a check member 20 and a sliding sleeve 30, wherein the sliding sleeve 30 is composed of a first sliding sleeve 31 and a second sliding sleeve 32 which are engaged with each other.

As a modification of this embodiment, an elastic snap mechanism is provided between the plug body 10 and the needle seat 50. The structure is as follows, as shown in fig. 2, a clamping groove 51 is arranged at one end of the needle seat 50 away from the needle point of the injection needle 60, as shown in fig. 3, two through grooves 14 extending axially from one side end surface of the clamping groove and penetrating through the wall of the stopper body are arranged on the stopper body 10, an elastic arm is formed on the stopper body wall between the adjacent through grooves 14, the elastic arm is provided with a buckle 15 extending radially inwards and matched with the clamping groove 51, and the elastic arm, the buckle 15 and the clamping groove 51 form the elastic buckle mechanism.

In the embodiment, as shown in fig. 4, in the assembling process, the plug body and the needle base are fixedly connected through the elastic buckle mechanism, the existing gluing mode is changed, only the two are needed to be pressed relatively in the assembling process, the assembling process is simpler, the working procedures are fewer, and the assembling efficiency is higher.

Preferably, as shown in fig. 3, the free end of the elastic arm is provided with a guiding tapered surface 16, and the guiding tapered surface 16 is arranged, so that the assembly efficiency is higher in the assembly process.

The check member of the present embodiment includes a disk-shaped body 21 and a rod-shaped body 22 connected to an edge of the disk-shaped body and extending axially toward one side of the disk-shaped body, as shown in fig. 6 and 7, wherein a through hole 23 is formed in the disk-shaped body 21, the through hole 23 is provided with an opening, and the check member is symmetrical with respect to a symmetry plane of the rod-shaped body and a symmetry plane of the opening. Compared with the asymmetric structure with the opening positioned on the side surface in the prior art, the symmetric structure has the advantages that after the non-return piece is pushed out, the needle tube is directly coated on the side surface of the opening, the needle tube does not topple to two sides, and the supporting effect is better; and secondly, the symmetrical structure enables the die to be more convenient to process and facilitates the feeding of the assembling machine.

In this embodiment, as shown in fig. 3 and 5 to 7, the plug body 10 is provided with an elastic limiting member 12, and a limiting groove 25 adapted to the elastic limiting member 12 is provided at a position on an inner side surface of the rod-shaped body 22 of the check member 20 close to the disk-shaped body 21.

Preferably, a first inclined surface 13 and a second inclined surface 26 which interact with each other are arranged between the elastic limiting member 12 and the limiting groove 25.

As a modification of this embodiment, as shown in fig. 6 and 7, a clearance groove 24 adapted to the elastic stopper 12 is provided inside the rod-shaped body 22. This keep away the setting of dead slot, at the in-process that the non return spare was released, the resistance that elasticity locating part received at this keep away the dead slot can be neglected almost for it is littleer to push out the in-process and need exert force, experiences better.

Preferably, the end of the clearance groove 24 remote from the disc-shaped body is provided with a third inclined surface 27 for interacting with the first inclined surface 13 to facilitate the ejection of the check.

As a modification of this embodiment, as shown in fig. 1, the outer wall of the sliding sleeve 30 is provided with a convex portion 33 corresponding to the position of the check 20, the convex portion 33 extends axially to the end of the sliding sleeve on the side away from the injection needle, and the end of the convex portion 33 forms a pushing portion 34. Preferably, the hand-push part is provided with a hand-push inclined surface. The hand-pushing part is arranged at the end part of the convex part corresponding to the check piece, and the radial height of the hand-pushing part is larger, so that an operator can apply pushing force more conveniently.

In order to make the finger more comfortable to press and better exert force, damping lines can be arranged on the inclined plane of the hand push.

As a modification of this embodiment, as shown in FIG. 1, the sliding sleeve 30 has an arc-shaped end surface 35 at the end near the injection needle, so that the comfort of the patient is better during the contact and pressing process with the skin of the patient.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. A safety syringe at least comprises a needle seat and a needle head protection device fixedly connected with the needle seat, wherein an injection needle is arranged on the needle seat, and the needle head protection device at least comprises a plug body, a sliding sleeve and a check piece; it is characterized in that an elastic buckle mechanism is arranged between the plug body and the needle base.

2. The safety syringe according to claim 1, characterized in that the needle holder is provided with a clamping groove at one end away from the needle tip of the injection needle, the plug body is provided with at least two through grooves axially extending from one side end surface of the clamping groove and penetrating through the wall of the plug body, the wall of the plug body between the adjacent through grooves forms an elastic arm, the elastic arm is provided with a radially inwardly extending buckle matched with the clamping groove, and the elastic arm, the buckle and the clamping groove form the elastic buckle mechanism.

3. A safety syringe according to claim 2 wherein the free end of the resilient arm is provided with a guide taper.

4. A safety syringe according to claim 1, wherein said check member comprises a disk-shaped body and at least one rod-shaped body connected to an edge of the disk-shaped body and extending axially toward one side of the disk-shaped body, said disk-shaped body being provided with a through hole provided with an opening, and said check member being symmetrical with respect to a plane of symmetry of said rod-shaped body and a plane of symmetry of said opening.

5. The safety syringe according to claim 4, wherein the plug body is provided with an elastic stopper, and the inner side surface of the rod-shaped body of the check member adjacent to the disk-shaped body is provided with a stopper groove adapted to the elastic stopper.

6. A safety syringe according to claim 5, characterized in that the inside of said rod-shaped body is provided with a clearance groove adapted to said elastic stopper.

7. A safety syringe according to claim 1, characterized in that the outer wall of the sliding sleeve is provided with a protrusion corresponding to the position of the non-return element, said protrusion extending axially to the end of the sliding sleeve on the side remote from the needle, the end of the protrusion forming a push-button.

8. A safety syringe according to claim 7 wherein the push portion is provided with a push ramp.

9. A safety syringe according to claim 8 wherein the push ramp is provided with a damping texture.

10. A safety syringe according to any one of claims 1 to 9 wherein the end of the sleeve adjacent the needle is provided with an arcuate end surface.

Images