CN210472152U

CN210472152U - Safety blood taking needle

Info

Publication number: CN210472152U
Application number: CN201920654484.XU
Authority: CN
Inventors: 周娜; 杨丽黎; 居敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-05-08
Anticipated expiration: 2029-05-08

Abstract

The utility model discloses a safety blood taking needle, it includes the cylinder, the syringe needle, needle file and needle cap, syringe needle fixed mounting is on the needle file, the cylinder has the opening and holds the chamber, opening appearance chamber both sides have flexible arm along cylinder axial extension, the terminal surface that the flexible arm in both sides is relative is equipped with draw-in groove and last draw-in groove respectively down, the needle file assembles in the lower draw-in groove of flexible arm through buckle subassembly, the needle cap cover is established on the needle head, needle cap outer cup has cup jointed outer strut, install the butt spring between outer strut and the needle file, outer strut both sides wall is equipped with outer expanding tip respectively, outer expanding tip's part and flexible arm go up the draw-in groove inlay and establish the cooperation, outer expanding tip can follow flexible arm medial surface axial under external drive and expand the flexible arm free end and form outer expanding opening structure makes the needle. The blood taking needle of the utility model can return the needle head into the needle cylinder after the use, is safer and more reliable in use, and reduces the risk of infection of medical staff.

Description

Safety blood taking needle

Technical Field

The utility model belongs to the technical field of medical instrument, especially, safe blood taking needle.

Background

In medical work, the operation of blood sampling inspection is often required, a common blood sampling needle consists of a needle cap, a needle base and a needle body, and during operation, the needle cap is taken off, and the needle body is used for sampling blood from a minimally invasive laceration of human skin. After the operation is finished, the needle body is exposed, so that if the operation is not careful, the needle body is easy to be punctured, or if the needle cap is not covered on the needle body again or falls off during recovery, recovery personnel can be punctured; the common blood taking needle is simple in structure and convenient to use, but in use or after use, medical staff are easily injured by pricking, and the risk of infection is brought to the medical staff.

In the prior art, in the field of disposable syringes, for the sake of safety use, the inventor designs a safety self-destruction syringe, as disclosed in the publication: CN1977990A patent document discloses that the needle is mounted on a retractable needle seat, after the injection is finished, the plastic push rod and the retractable needle seat are connected into a whole, and the retractable needle seat and the needle are retracted into the plastic syringe together by pulling the plastic push rod leftwards with force, so that the needle cannot stab others. Based on the above structure, the utility model designs a section can return the syringe needle to the safe blood taking needle structure in the cylinder after the operation.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a safe blood taking needle which can return the needle head into the needle cylinder after the use is finished, is safer and more reliable in use and reduces the risk of infection of medical staff.

In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a safe blood taking needle, includes cylinder, syringe needle, needle file and needle cap, and syringe needle fixed mounting is on the needle file, and the cylinder has the opening and holds chamber, its characterized in that: the needle holder is assembled in the lower clamping groove of the flexible arm through a buckle assembly, a needle cap is sleeved on a needle head, an outer support frame is sleeved outside the needle cap, a butt spring is installed between the outer support frame and the needle holder, outer expanding end portions are arranged on two side walls of the outer support frame respectively, the part of each outer expanding end portion is in embedded fit with the corresponding clamping groove in the flexible arm, and the outer expanding end portions can slide axially along the inner side surface of the flexible arm to drive the free ends of the flexible arms to expand outwards under the driving of external force so that the needle holder and the lower clamping groove are disengaged and matched in a clamping mode.

In the structure, the needle head is assembled at the lower end of the flexible arm of the needle cylinder through the needle seat, the needle cap cover is arranged on the needle head, the needle cap is externally sleeved with the outer support frame, the lower end of the outer support frame is buckled at the upper end of the flexible arm of the needle cylinder, when the needle cap is used, the needle head is pulled out, blood can be collected, after the operation is completed, the outer support frame is pushed to move downwards to drive the flexible arm to open outwards, the needle seat and the flexible arm of the needle cylinder are disengaged and buckled, the needle head and the needle seat fall into the needle cylinder, the outer support frame is continuously pushed to enable the outer support frame to also fall into the needle cylinder, the outer support frame and the needle seat are tensioned through the abutting spring, the needle head and the needle seat can be prevented from shaking.

Further, the needle file includes the mount pad body, and the syringe needle is fixed in mount pad body upper end, and mount pad body both sides are equipped with the extension wall, and the extension wall up end flushes with mount pad body up end, and the terminal surface is longer than mount pad body lower extreme terminal surface under the extension wall, and the terminal surface is equipped with the toper stabilizer blade under this extension wall, and the toper face of toper stabilizer blade is towards the extension wall lateral projection.

In the structure, the extension wall is splayed and extends from two sides of the mounting seat body, and the conical support leg is mounted at the extension end of the extension wall.

Furthermore, the outer side surface of the extension wall is outwards inclined from the lower end surface of the upper end surface of the mounting seat body.

In the structure, the outer side of the extension wall extends obliquely, so that a channel between the flexible arm and the mounting seat body is in a structure with a large upper part and a narrow lower part, and the flexible arm is easier to drive to open and the buckling structure of the needle seat and the flexible arm is opened in the gliding process of the outer support frame.

Furthermore, the outer support frame comprises an outer support sleeve sleeved outside the needle cap, the upper end face of the outer support sleeve is provided with a boss end part, two sides of the lower end face of the outer support sleeve extend to form axial side walls, and the outer expansion end part is arranged at the free end of the axial side wall.

In the structure, the boss end part of the upper end surface of the outer support sleeve forms spacing fit with the annular sheet on the inner wall of the opening end of the opening cavity after sliding into the opening cavity of the needle cylinder to prevent the outer support sleeve from falling off, and the axial side wall of the outer support sleeve enables the outer support sleeve to have micro elasticity when being acted by external force, can deform slightly and enters the opening cavity of the needle cylinder.

Furthermore, the needle cap comprises a needle body sleeve, the upper end of the needle body sleeve is connected with a needle head cap body, the width of the needle head cap body is larger than that of the needle body sleeve, the needle body sleeve is positioned in an outer support sleeve inner hole of the outer support frame, the needle head cap body is positioned above the outer support frame, and the lower end face of the needle head cap body is provided with an annular groove which is in splicing fit with the end part of the boss of the outer support sleeve.

In the structure, the needle body sleeve covers the outside of the needle body, the needle head cap body covers the outside of the needle head to prevent the needle head from being exposed, and the annular groove on the lower end face of the needle head cap body is mainly used for tightly buckling the boss end part of the outer support frame after the outer support frame returns to the needle cylinder to completely cover and retain the needle head in the needle cylinder.

Further, expand the tip outward and include the rectangle tip that extends along axial lateral wall direction, rectangle tip thickness is greater than the axial lateral wall, and rectangle tip lateral surface is equipped with the flange that expands outwards, and the transition department of flange and rectangle tip is equipped with the annular groove, goes up the draw-in groove inner wall and has the fixture block with annular groove complex.

In the structure, in order to facilitate downward movement of the outward-expanding end part, the lower end face of the rectangular end part is designed into an arc-shaped surface structure, the rectangular end part and the flange structure both play a role in driving the flexible arm to expand outward, and the outward-expanding end part forms fixed fit with a convex block on the upper clamping groove wall through the annular groove.

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

Drawings

FIG. 1 is a view showing an appearance structure of a specific embodiment of the present invention before use;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a sectional view of the structure of the embodiment of the present invention before use;

FIG. 4 is a cross-sectional view of the structure of the embodiment of the present invention after use;

the needle comprises a needle 11, a needle handle 12, a groove 121, a needle holder 2, a mounting seat body 21, an extending wall 22, a tapered support 23, a needle cylinder 3, an open cavity 31, an annular sheet 311, a flexible arm 32, an upper clamping groove 321, a clamping block 321a, a lower clamping groove 322, a needle cap 4, a needle body sleeve 41, a needle cap body 42, an annular groove 421, a salient point structure 411, an outer support frame 5, an outer support sleeve 51, an axial side wall 52, an outer expanding end part 53, a rectangular end part 531, a flange 532, an annular groove 533, a boss end part 54 and an abutting spring 6.

Detailed Description

The utility model discloses not confine the following embodiment to, general technical personnel in this field can adopt other multiple embodiment to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.

The utility model discloses a specific embodiment is shown in fig. 1-4 is safe blood taking needle, it is by cylinder 3, syringe needle 11, needle file 2, needle cap 4 and outer strut 5 are constituteed, syringe needle 11 fixed mounting is on needle file 2, needle file 2 includes mount pad body 21, syringe needle 11 is fixed in mount pad body 21 upper end, mount pad body 21 both sides are equipped with extension wall 22, extend wall 22 up end and flush with mount pad body 21 up end, the terminal surface extension forms the both sides of splayed structure distribution under mount pad body 21 under the extension wall 22, the extension section free end of terminal surface is equipped with toper stabilizer blade 23 under this extension wall 22, the toper face of toper stabilizer blade 23 is towards extending the outside of wall 22. The needle holder 2 is snap-fixedly assembled to the cylinder 3 by the tapered leg 23. Specifically, the needle cylinder 3 has an open cavity 31, flexible arms 32 extend axially along the needle cylinder 3 on both sides of the open cavity 31, lower engaging grooves 322 and upper engaging grooves 321 are respectively formed on opposite end surfaces of the flexible arms 32 on both sides, and the needle holder 2 is installed in the lower engaging grooves 322.

The upper clamping groove 321 of the flexible arm 32 is matched with the outward-expanding end part 53 of the outer support frame 5, the outer support frame 5 comprises an outer support sleeve 51, the upper end surface of the outer support sleeve 51 is provided with a boss end part 54, the inner hole of the outer support sleeve 51 extends to the boss end part 54, two sides of the lower end surface of the outer support sleeve 51 extend to form axial side walls 52, and the outward-expanding end part 53 is arranged at the free end of the axial side walls 52. The outer supporting sleeve 51 is arranged outside the needle cap 4 in a penetrating mode, the needle cap 4 is sleeved on the needle head 11, the outer expanding end portion 53 of the outer supporting sleeve 51 is fixedly connected in the upper clamping groove 321 of the needle cylinder 3 in a buckling mode, the abutting spring 6 is installed between the outer supporting sleeve 5 and the needle seat 2, and the abutting spring 6 is located between the axial side walls 52 on the two sides of the outer supporting sleeve 51. The outward-expanding end portion 53 comprises a rectangular end portion 531 extending along the direction of the axial side wall 52, the thickness of the rectangular end portion 531 is larger than that of the axial side wall 52, an outward-expanding flange 532 is arranged on the outer side surface of the rectangular end portion 531, an annular groove 533 is arranged at the transition position of the flange 532 and the rectangular end portion 531, and a clamping block 321a matched with the annular groove 533 is arranged on the inner wall of the upper clamping groove 321. In order to facilitate the outer bracket 5 to expand the space between the flexible arm 32 and the outer wall of the needle holder 2, the outer side surface of the extending wall 22 of the needle holder 2 is inclined outwards from the upper end surface to the lower end surface of the mounting seat body 21, i.e. a channel between the flexible arm 32 and the extending wall 22 of the needle holder 2 is formed, which has a large top and a small bottom, so that the buckling structure between the lower clamping groove 322 of the flexible arm 32 and the needle holder 2 is more easily expanded in the downward sliding process of the outer bracket 5.

The needle cap 4 is mainly used for covering the needle 11 to prevent the needle 11 from being exposed, and structurally comprises a needle body sleeve 41, wherein the upper end of the needle body sleeve 41 is connected with a needle head cap body 42, the width of the needle head cap body 42 is larger than that of the needle body sleeve 41, the needle body sleeve 41 is positioned in an inner hole of an outer support sleeve 51 of an outer support frame 5, the needle head cap body 42 is positioned above the outer support frame 5, and the lower end face of the needle head cap body 42 is provided with an annular groove 421 which is matched with a boss end part 54 of the. In the initial state, the needle head cap body 42 is located above the boss end 54 of the outer supporting sleeve 51 and the needle head cap body 42 still leaves a space after covering the needle head 11, the inner hole wall of the lower end of the needle body casing tube 41 is provided with a plurality of bump structures 411, the bump structures 411 are buckled with the outer wall groove 121 of the needle handle 12 at the lower end of the needle body, after the use is finished, after the needle head 11, the needle seat 2 and the outer support frame 5 are all retreated into the opening containing cavity 31 of the needle tube, the needle cap 4 is pushed along the direction of the outer support frame 5 to enable the annular groove 421 at the lower end face of the needle head cap body 42 to be tightly buckled on the boss end 54 of the outer supporting sleeve 51, and the inner hole wall of the lower end of the needle body casing tube 41 is buckled with the outer wall groove 121 of the needle handle 12.

The utility model discloses a concrete use as follows: when the blood sampling operation is performed, the needle cap 4 is detached, the needle head 11 of the blood sampling needle is exposed, the needle cylinder 3 is held, the normal blood sampling operation can be performed, after the operation is completed, the front end and the rear end of the outer support frame 5 are pinched by two fingers, the outer support frame 5 is forced to slide towards the needle cylinder 3, the outer support frame 5 props the flexible arms 32 at two sides of the needle cylinder 3 through the outer expanding end part 53, so that the needle seat 2 is disengaged from the lower clamping groove 322 to form a buckling structure, the needle seat 2 and the needle head 11 fall into the open containing cavity 31 of the needle cylinder 3 together, the depth of the open containing cavity 31 is larger than the length of the needle seat 2 and the needle head 11 which are connected together, the annular sheet 311 at the opening end of the open containing cavity 31 plays a limiting role, after the needle seat 2 and the needle head 11 fall into, the outer support frame 5 continues to move along the inner side surface of the flexible, the tension of the abutting spring 6 between the outer support frame 5 and the needle base 2 keeps the outer support frame 5 and the needle base 2 at a stable distance, and the needle 11 can be accommodated in the inner hole of the outer support sleeve 51 and is not exposed outside the needle cylinder 3, so that even if the needle cap 4 is lost, the needle 11 is not exposed, and if the needle cap 4 is not lost, the needle cap 4 is pressed downwards to be tightly buckled on the lug boss end part 54 of the outer support sleeve 51, so that the needle tip is covered in the needle cap 4.

Claims

1. The utility model provides a safe blood taking needle, includes cylinder, syringe needle, needle file and needle cap, and syringe needle fixed mounting is on the needle file, and the cylinder has the opening and holds chamber, its characterized in that: the needle holder is assembled in the lower clamping groove of the flexible arm through a buckle assembly, a needle cap is sleeved on a needle head, an outer support frame is sleeved outside the needle cap, a butt spring is installed between the outer support frame and the needle holder, outer expanding end portions are arranged on two side walls of the outer support frame respectively, the part of each outer expanding end portion is in embedded fit with the corresponding clamping groove in the flexible arm, and the outer expanding end portions can slide axially along the inner side surface of the flexible arm to drive the free ends of the flexible arms to expand outwards under the driving of external force so that the needle holder and the lower clamping groove are disengaged and matched in a clamping mode.

2. A safety lancet according to claim 1, wherein: the needle file comprises a mounting seat body, the needle head is fixed at the upper end of the mounting seat body, extension walls are arranged on two sides of the mounting seat body, the upper end face of each extension wall is flush with the upper end face of the mounting seat body, the lower end face of each extension wall is longer than the lower end face of the mounting seat body, conical support legs are arranged on the lower end faces of the extension walls, and the conical surfaces of the conical support legs protrude towards the outer side of the extension walls.

3. A safety lancet according to claim 2, wherein: the outer side surface of the extension wall is outwards inclined from the lower end surface of the upper end surface of the mounting seat body.

4. A safety lancet according to any one of claims 1 to 3, characterised in that: the outer support frame comprises an outer support sleeve sleeved on the outer side of the needle cap, a boss end portion is arranged on the upper end face of the outer support sleeve, axial side walls extend from two sides of the lower end face of the outer support sleeve, and the outer expansion end portion is arranged at the free end of the axial side wall.

5. A safety lancet according to claim 4, wherein: the needle cap comprises a needle body sleeve, the upper end of the needle body sleeve is connected with a needle head cap body, the width of the needle head cap body is larger than that of the needle body sleeve, the needle body sleeve is positioned in an outer support sleeve inner hole of an outer support frame, the needle head cap body is positioned above the outer support frame, and the lower end face of the needle head cap body is provided with an annular groove which is in insertion fit with the end part of a boss of the outer support sleeve.

6. A safety lancet according to claim 4, wherein: the outer expanding end part comprises a rectangular end part extending along the direction of the axial side wall, the thickness of the rectangular end part is larger than that of the axial side wall, an outward expanding flange is arranged on the outer side face of the rectangular end part, an annular groove is formed in the transition position of the flange and the rectangular end part, and a clamping block matched with the annular groove is arranged on the inner wall of the upper clamping groove.

7. A safety lancet according to claim 5, wherein: the outer expanding end part comprises a rectangular end part extending along the direction of the axial side wall, the thickness of the rectangular end part is larger than that of the axial side wall, an outward expanding flange is arranged on the outer side face of the rectangular end part, an annular groove is formed in the transition position of the flange and the rectangular end part, and a clamping block matched with the annular groove is arranged on the inner wall of the upper clamping groove.