CN210750666U

CN210750666U - Needle head with protective sleeve

Info

Publication number: CN210750666U
Application number: CN201920452232.9U
Authority: CN
Inventors: 朱平南
Original assignee: Jiangsu Jichun Medical Devices Co ltd
Current assignee: Jiangsu Jichun Medical Devices Co ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-06-16
Anticipated expiration: 2029-04-03

Abstract

The utility model belongs to injection transfusion system field aims at providing a take syringe needle of protective sheath, and its technical scheme main points include the syringe needle, can overlap the protective sheath of locating on the syringe needle, can dismantle between protective sheath and the syringe needle and be connected, mutually independent between the syringe three of protective sheath, syringe needle adaptation, or mutually independent between protective sheath, the syringe needle, the protective sheath is applicable to any kind of national standard syringe. In different use scenes, the protective sleeve can be connected with the injection needle and the injector to be matched according to actual requirements, or the injection needle and the injector can be matched to be used. Because the protective sheath can be applicable to all syringes of the national standard production on the market, consequently application scope is wide, under the operating mode that does not need the protective sheath, also can the exclusive use syringe and syringe needle.

Description

Needle head with protective sleeve

Technical Field

The utility model relates to the field of medical injector transfusion systems, in particular to a needle head with a protective sleeve.

Background

The injector and the infusion set are common products in medical appliances, and the working principle of the injector and the infusion set is to input liquid medicine into a patient body in a pressurizing mode.

At present, chinese patent with publication number CN106031806A discloses a needle safety protection sleeve structure, which is mounted on a needle base, and includes a bending connection mechanism including a first bending member and a second bending member, the first bending member is connected to the needle base, and further includes a protection sleeve, and the protection sleeve has a sleeving space.

In the structure, the needle head seat and the needle tube are arranged integrally, and the needle point and the first bending piece in the protective sleeve are arranged integrally. In many medical settings, syringes are used for a short period of time, and disposable syringes are removed from the time they are needed for injection, injected into a patient after drawing the medical fluid, take little time, and are discarded immediately after injection. The protective sheath in the above-mentioned file can protect the syringe when putting the syringe temporarily, nevertheless in the in-service use process, if all have the protective sheath on each syringe needle, and the part that protective sheath and syringe needle linked firmly compares in the syringe needle great, convenience when influencing the injection easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a take syringe needle of protective sheath has application scope extensively, is difficult for influencing the advantage of injection work.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a take syringe needle of protective sheath, includes the syringe needle, can overlap the protective sheath of locating on the syringe needle, can dismantle between protective sheath and the syringe needle and be connected, mutual independence between the syringe three of protective sheath, syringe needle adaptation, or mutual independence between protective sheath, the syringe needle, the protective sheath is applicable to any kind of national standard syringe.

Through adopting above-mentioned technical scheme, in the use scene of difference, can be according to actual need, connect the cooperation with protective sheath and syringe needle, syringe and use, or only use syringe needle and syringe cooperation. Because the protective sheath can be applicable to all syringes of the national standard production on the market, consequently application scope is wide, under the operating mode that does not need the protective sheath, also can the exclusive use syringe and syringe needle.

Further, the protective sheath includes the cover chamber that is used for holding the syringe needle, is located cover chamber tip and rotates the connecting piece that links to each other with the syringe needle, the syringe needle can be dismantled with the one end that the syringe links to each other and be connected.

Through adopting above-mentioned technical scheme, can dismantle the structure of connecting and let cooperation between syringe needle, syringe and the protective sheath three use more in a flexible way, in process of production, batch production national standard syringe, batch production protective sheath alone loads onto the protective sheath for the syringe that needs the installation protective sheath again. The detachable and adaptable structure can effectively improve the mass production efficiency, is not limited to injectors produced by different manufacturers, and has wide application range.

Further, the connecting piece includes the connector that cup joints with syringe needle bottom base, the elastic component of drawing forth from the connector side, the cover chamber is deviated from connector one side with the elastic component and is linked firmly.

Through adopting above-mentioned technical scheme, syringe and syringe needle that have the protective sheath when giving the patient acupuncture, do not influence each other between cover chamber and the syringe needle, when having used up need cover the cover chamber cover on the syringe needle and prevent secondary pollution, exert external force to the cover chamber, the elastic component takes place deformation this moment.

Further, the inner wall of the connector is an arc surface in interference fit with the bottom of the injection needle, a sealing thread used for improving the sealing degree is arranged on the outer wall of one end, away from the injection needle, of the connector, and the inner wall of the connector with the sealing thread part is matched with the liquid outlet position of the injector in shape.

By adopting the technical scheme, if the injection needle and the injector are connected only by adopting a conventional sleeving connection mode, when the liquid medicine in the injector is pushed out, the generated pressure is easily transmitted to the injection needle, and the reliability of sleeving connection is influenced; threaded connection can improve joint strength, effectively reduces the influence degree of syringe axial effort to the syringe needle.

Further, the elastic component includes at least one elastic sheet that is located between connector and the cover chamber, still is equipped with spacing card group between connector and the cover chamber, spacing card group is including the first card body of drawing forth from the connector lateral wall, the second card body of drawing forth from the cover chamber, and the cover chamber rotates the in-process around the connector, and first card body and second card body contradict once each other at least.

By adopting the technical scheme, when the sleeve cavity is rotated and sleeved on the injection needle, in the process, when the first clamping body and the second clamping body are mutually collided, the first clamping body and the second clamping body can be continuously rotated until the sleeve cavity falls on the injection needle after the first clamping body and the second clamping body are collided under the action of external force; if no external force exists, when the first clamping body and the second clamping body are mutually abutted, the rotation of the sleeve cavity is subjected to resistance and is not easy to continue rotating, so that the probability that the sleeve cavity rotates to be close to the injection needle and the injection of the injection needle is influenced during injection is reduced.

Furthermore, the surface of the second clamping body contacted with the first clamping body is an arc surface.

By adopting the technical scheme: the arc surface can reduce the damage produced when the first card body and the second card body conflict each other, if the contact position is sharp edges and corners, then probably make first card body or second card body cracked in the conflict in-process.

Furthermore, a shaft shoulder type structure is arranged between the part of the connector with the sealing thread and the part of the arc surface of the outer wall of the connector.

Through adopting above-mentioned technical scheme, the great part of size in the shoulder formula structure can improve overall structure's stability, and back on the syringe was installed to the connector, shoulder department just in time can be inconsistent with the tip of syringe, has improved connection structure's reliable degree.

Furthermore, the sleeve cavity is open, the injection needle falls into the sleeve cavity through the open part, the size of the sleeve cavity is narrowest near the needle tip of the injection needle, and the surface of the sleeve cavity, which is close to the connecting piece, is vertical to the infusion needle when the sleeve cavity is used.

By adopting the technical scheme, the sleeve cavity is sleeved on the injection needle so as to prevent the injection needle from being discarded and secondarily polluted, and the injection needle does not need to be taken down after being sleeved; after the sleeve cavity is sleeved, the plane of the bottom of the sleeve cavity is parallel to the cross section of the connector, and compared with a structure that the two planes are arranged at an included angle, the sleeve cavity has a more stable relative position relation.

Furthermore, a plurality of mutually staggered limiting teeth are arranged in the sleeve cavity, and included angles are formed between the limiting teeth and the side wall of the sleeve cavity.

Through adopting above-mentioned technical scheme, spacing tooth is used for blocking the syringe needle, hinders that the syringe needle deviates from the cover chamber.

Furthermore, the axial length of the sleeve cavity is suitable for any infusion needle meeting the industrial standard, one group of the limiting teeth which is farthest away from the injector is clamped at the needle point of the injection needle when in use, and the oblique cut of the needle point of the injection needle is exposed out of the limiting teeth.

Through adopting above-mentioned technical scheme, the effect in cover chamber plays the guard action to the syringe needle, consequently should have even spacing power to exert to each part of syringe needle, and the array of spacing tooth is arranged, is spacing at syringe needle or the needle tail of syringe needle to be the mode of effectively fixing the syringe needle.

Drawings

FIG. 1 is a schematic view of the components of a syringe with a protective sheath and needle;

fig. 2 is an enlarged view of fig. 1 for embodying the structure of the connection head;

FIG. 3 is a schematic view of the relative position between the needle and the sheath;

fig. 4 is a schematic structural view of the enlarged view of the portion B of fig. 3 for showing the elastic member.

In the figure, 1, an injection needle; 2. a protective sleeve; 21. a sleeve cavity; 22. a connecting member; 23. sealing the threads; 24. limiting teeth; 221. a connector; 222. an elastic member; 222-1, an elastic sheet; 222-2, a limit card group; 222-21, a first card body; 222-22 and a second card body.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The utility model provides a take syringe needle of protective sheath, as shown in figure 1, is used to on the syringe mostly, including syringe needle 1, can the cover locate the protective sheath 2 on the syringe needle 1, syringe and syringe needle 1 can be any one according to national standard production on the market, homoenergetic and protective sheath 2 supporting use.

The protective sleeve 2 is detachably connected with the injection needle 1, the protective sleeve 2, the injection needle 1 and the injector matched with the injection needle 1 are mutually independent, for example, the protective sleeve 2, the injection needle 1 and the injector come from different manufacturers, but as long as the injection needle 1 and the injector meet the national standard, the protective sleeve 2 can be matched with the injection needle 1 and the injector which are assembled for use in the last installation procedure; or the protective sleeve 2 and the injection needle 1 are independent from each other, in this case, the assembled semi-finished products can be selected for the injector and the injection needle 1, and then the protective sleeve 2 is additionally arranged on the tools which can meet the injection requirements when needed.

As shown in fig. 1, the protective sheath 2 comprises a sheath cavity 21 for accommodating the injection needle 1, and a connecting member 22 located at the end of the sheath cavity 21 and rotatably connected with the injection needle 1, and since the injection needle 1 is detachably connected with the end connected with the injector and is mostly directly sleeved, the connecting member 22 of the protective sheath 2 is located between the injection needle 1 and the injector when being installed, and two ends of the connecting member are respectively sleeved with the liquid outlet of the injector and the needle seat of the injection needle 1.

As shown in fig. 2 and 3, the connecting member 22 includes a connecting head 221 sleeved on the base of the bottom of the injection needle 1, and an elastic member 222 led out from the side of the connecting head 221, and the sleeve cavity 21 is fixedly connected with the elastic member 222 on the side away from the connecting head 221. The connector 221 is provided with two cylindrical pipe fittings with different sizes, the two cylindrical pipes are communicated with each other, the inner walls of the two cylindrical pipes are smooth arc surfaces, the end with the larger diameter is in interference fit with the needle seat of the injection needle 1, and the needle seat is arranged in the connector 221; the inner wall of the part with the smaller diameter is an arc surface, so that the part is conveniently sleeved with the cylindrical pipe fitting part at the liquid outlet position of the injector, and the liquid outlet position of the injector is positioned in the connector 221. When the protective sleeve 2 with the structure is installed, only the sleeve is needed to be sleeved.

As shown in fig. 2, in order to improve the sealing performance, a sealing thread 23 is further provided on the outer circumferential surface of the smaller diameter end of the connection head 221, and the sealing thread 23 is structurally adapted to the syringe with a threaded port. The threaded port is a cylindrical tube which is led out from the injector and has a diameter larger than that of the original liquid outlet, and the inner wall of the cylindrical tube is provided with internal threads matched with the sealing threads 23. When the protective cover 2 having such a structure is mounted, the injection needle 1 is fitted to the connector 221, and the syringe is screwed to the connector 221.

Therefore, two sections of parts with different diameters are coaxially connected on the connector 221, a shaft shoulder structure is arranged at the connection position, and after the connector is installed, the plane at the shaft shoulder can just abut against the end face of the cylindrical pipe at the original liquid outlet position.

As shown in fig. 3 and 4, the elastic member 222 includes at least one elastic piece 222-1 located between the connector 221 and the housing 21, in this embodiment, two elastic pieces 222-1 are provided, and the elastic piece 222-1 is a thin plastic piece that is led out from the housing 21 and is integrally provided with the housing 21 and the connector 221, and the thin plastic piece can bear a certain degree of bending and is not easily deformed when no external force is applied.

As shown in fig. 3 and 4, a limit card set 222-2 is further disposed between the connector 221 and the sleeve cavity 21, the limit card set 222-2 is located between the two elastic pieces 222-1, the limit card set 222-2 includes a first card body 222-21 led out from a side wall of the connector 221 and a second card body 222-22 led out from the sleeve cavity 21, and the first card body 222-21 and the second card body 222-22 are abutted against each other at least once during rotation of the sleeve cavity 21 around the connector 221. The contact parts of the first and second clamping bodies 222-21 and 222-22 are arc surfaces, when the first and second clamping bodies 222-21 and 222-22 contact each other, the sleeve cavity 21 can continue to rotate by means of external force, if no external force acts, the sleeve cavity 21 is blocked in the rotation process and then rebounds to the initial state, the initial state of the sleeve cavity 21 is perpendicular to the axis of the connector 221, and the play range of the sleeve cavity 21 is only 15-30 degrees, so that the interference of the sleeve cavity 21 on the injection needle 1 during injection is reduced.

The sleeve cavity 21 is open, when the sleeve cavity 21 rotates to be close to the injection needle 1, the injection needle 1 falls into the sleeve cavity 21 through the open part, the sleeve cavity 21 is conical as a whole, the size of the sleeve cavity 21 is narrowest at the position close to the needle point of the injection needle 1, a plurality of mutually staggered limiting teeth 24 are arranged in the sleeve cavity 21, and an included angle is formed between each limiting tooth 24 and the side wall of the sleeve cavity 21, in the embodiment, the included angle between each limiting tooth 24 and the side wall where the limiting tooth is located is 45 degrees, when the injection needle 1 falls between the limiting teeth 24, every two limiting teeth 24 are in one group, one group of limiting teeth 24 are in a mutually crossed position, namely, one end of each limiting tooth 24 departing from the side wall of the sleeve cavity 21 exceeds the middle position of the bottom wall of the sleeve cavity 21 and is not connected with the bottom wall of the sleeve cavity 21, so that the injection needle 1 firstly collides with the limiting teeth 24 and continues to be pressed downwards until the limiting teeth 24, namely, the limit teeth 24 and the triangular area formed by the bottom wall of the sleeve cavity 21 are not easy to be separated.

After the sleeve cavity 21 limits the injection needle 1, the surface of one end of the sleeve cavity, which is close to the connecting piece 22, is vertical to the infusion needle, namely the surface of the larger end of the sleeve cavity 21 is parallel to the axial cross section of the injector.

The axial length of cover chamber 21 is applicable to any kind of transfusion needle that accords with the industry standard, and the one set that deviates from the syringe farthest in spacing tooth 24 blocks in the department of syringe needle 1 needle point when using, and the chamfer of syringe needle 1 needle point exposes outside this department spacing tooth 24, that is to say, after syringe needle 1 was covered cover chamber 21, three linear array's of group spacing tooth 24 just fell near the trisection point of syringe needle 1 in this embodiment, and when national standard syringe needle 1 was spacing, the needle point position can have spacing tooth 24 to carry out spacing.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a take syringe needle of protective sheath, includes syringe needle (1), can overlap protective sheath (2) of locating on syringe needle (1), its characterized in that: the protective sleeve (2) is detachably connected with the injection needle (1), the protective sleeve (2), the injection needle (1) and the injector matched with the injection needle (1) are mutually independent, or the protective sleeve (2) and the injection needle (1) are mutually independent, and the protective sleeve (2) is suitable for any national standard injector;

the protective sleeve (2) comprises a sleeve cavity (21) for accommodating the injection needle (1) and a connecting piece (22) which is positioned at the end part of the sleeve cavity (21) and is rotationally connected with the injection needle (1), and one end of the injection needle (1) connected with the injector is detachably connected;

the connecting piece (22) comprises a connecting head (221) sleeved with a base at the bottom of the injection needle (1) and an elastic piece (222) led out from the side edge of the connecting head (221), and the sleeve cavity (21) is fixedly connected with one side, away from the connecting head (221), of the elastic piece (222);

the inner wall of the connector (221) is an arc surface in interference fit with the bottom of the injection needle (1), a sealing thread (23) for improving the sealing degree is arranged on the outer wall of one end, away from the injection needle (1), of the connector (221), and the inner wall of the part, with the sealing thread (23), of the connector (221) is matched with the liquid outlet position of the injector in shape;

the elastic piece (222) comprises at least one elastic piece (222-1) positioned between the connector (221) and the sleeve cavity (21), a limiting clamping set (222-2) is further arranged between the connector (221) and the sleeve cavity (21), the limiting clamping set (222-2) comprises a first clamping body (222-21) led out from the side wall of the connector (221) and a second clamping body (222-22) led out from the sleeve cavity (21), and the first clamping body (222-21) and the second clamping body (222-22) are mutually abutted at least once in the rotation process of the sleeve cavity (21) around the connector (221);

the surface of the second card body (222-22) contacted with the first card body (222-21) is a circular arc surface;

and a shaft shoulder type structure is arranged between the part of the connector (221) with the sealing thread (23) and the arc surface part of the outer wall of the connector (221).

2. A needle with a protective cover according to claim 1, wherein: the sleeve cavity (21) is arranged to be open, the injection needle (1) falls into the sleeve cavity (21) through the open part, the size of the sleeve cavity (21) is the narrowest near the needle point of the injection needle (1), and when the sleeve cavity (21) is used, the surface of one end of the sleeve cavity, which is near the connecting piece (22), is vertical to the infusion needle.

3. A needle with a protective cover according to claim 1, wherein: a plurality of mutually staggered limiting teeth (24) are arranged in the sleeve cavity (21), and included angles are formed between the limiting teeth (24) and the side wall of the sleeve cavity (21).

4. A needle with a protective cover according to claim 3, wherein: the axial length of the sleeve cavity (21) is suitable for any one type of infusion needle meeting the industrial standard, one group of the limiting teeth (24) which is farthest away from the injector is clamped at the needle point of the injection needle (1) when in use, and the oblique notch of the needle point of the injection needle (1) is exposed out of the limiting teeth (24).