CN110354342A

CN110354342A - A kind of safe injection needle

Info

Publication number: CN110354342A
Application number: CN201910093549.2A
Authority: CN
Inventors: 张亚平
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2019-10-22

Abstract

A kind of safe injection needle is made of needle stand, needle tubing, limit plate, sheath；Be characterized in that: needle tubing is bonded in the inner hole of needle stand front end；Sheath divide upper-lower section, between connected by thin-walled；Sheath lower section be inlaid in needle stand appearance, upper section in a tubular form, length is slightly larger than needle tubing length, upper section has longitudinal latasuture, slit width degree is equal to or less than upper section internal diameter, the locking plate that two panels is inside, tilts down is equipped in upper section inside middle portion wall, locking plate is opposite to intersect cross center line, and crosspoint is located at the lower section of upper section middle line；Postive stop baffle is installed using the preceding bottom in sheath upper section, the inclined bottom surface of postive stop baffle can be such that the middle line of sheath upper-lower section deviates outward, and injection needle axis is made to be in the outer upper side of locking plate；Because postive stop baffle falls off after use, the axis of sheath upper-lower section deviates again, and injection needle axis is made to be biased to the interior side-lower of sheath upper section middle line, intersects masking limitation by locking plate.The second slot of tooth socket of the teeth of sheath lower section upper limb and upper section bottom forms build-in locking simultaneously, prevents from being reused.Due to using single sheath, component is reduced, packaging volume is reduced, reduces cost, be readily produced, be easy to use, is conducive to promote and apply.

Description

A kind of safe injection needle

Technical field

The present invention relates to the lancet devices, in particular to a kind of safe injection needle in medical instruments field.

Background technique

After U.S.'s eighties in last century finds Patient With Aids, World Health Organization WHO proposes that " safety injection three is former Then ", it is desirable that research and use safety needle, but for technical reasons, international community be mostly by syringe outer cylinder with The limit method of push rod punctures piston or self-destruction syringe is made in the modes such as the push rod that fractures, and limitation syringe, which is repeated, to be made With；But due to injection needle point it is still exposed, not can avoid needle stick injury, still cause blood borne disease (AIDS, hepatitis B, Hepatitis etc.) infection and propagation；The requirement of in the 21st century, national governments and international community for safe injection needle is more compeled It cuts；There is the safety injector of multiple technologies scheme in international community, is mostly using manually pulling or mechanical (compressed spring) power Make in injection needle restoring to outer cylinder or push rod inner cavity shields, while injection needle ruins the not reproducible use of type.But due to cost Increase several times compared with ordinary syringe, affect the universal of safety injector and limits its scope of application；Furthermore due to being to utilize The technical solution of syringe protection injection needle causes the serious wasting of resources so that the syringe of devoid of risk is largely destroyed.

Chinese patent: CN103432657 B discloses " a kind of safe injection needle ", and technical characteristic is: including syringe needle, needle End protective cover, needle holder and safe needle shield composition.Safe needle sleeve, which is equipped with, to be set cylinder on sleeve and its sleeve and clasps syringe needle Locking plate；Needle holder borrows interconnecting piece to connect with safe needle sleeve；Sleeve is connected with snak link with cylinder；There are grab, cylinder on sleeve On have corresponding card hole.

Chinese patent: 104069568 B of CN discloses " a kind of safety device that can lock injection needle ", and structure is It is made of safety guard and the locking boss being arranged on safety guard, locking plate, location hole, location hole step and injection needle；Its technology Be characterized in: the needle point after use is firmly locked in safety guard after entering locking plate by locking boss.Injection needle is by needle stand, needle Pipe and sheath composition.Locking plate at least two panels extends to central point；It is outer that slotted cone is corresponding on locking boss The smaller small cylinder of diameter.

Foregoing invention patent is all to increase a protective jacket on the outside of current injection needle (needle stand, needle tubing, sheath), is used When, it removes former sheath and exposes needle point, safe needle sleeve is covered into needle point after use, needle point is blocked with locking plate or card, and with card The cylindrical body and the mutual interlocking of small cylinder of hook and card hole or fluting, complete the masking and locking to needle point, it are prevented to be repeated It uses.

Above-mentioned technical proposal Shortcomings: increase a sheath compared with injection needle original component；Because of the presence of former sheath, so that peace Full sheath is in (half mulching) position of one side, has both increased the volume of packaging in this way, wastes a sheath, increases cost, increases Operation link；Has there are more than ten years in Europe in the design scheme, is not generalizable in clinical application at home and abroad.

Therefore, design a kind of participation for not needing syringe, do not increase Package size and reduce to the greatest extent cost, have from My safe injection needle of safeguard function is necessary.

Summary of the invention

Goal of the invention: being for deficiency present in current all technologies, research and develop a kind of succinct, low cost, be conducive to produce and Meet the safe injection needle of clinical use regulation.

A kind of safe injection needle is made of needle stand, needle tubing, limit plate, sheath；It is characterized by: before needle tubing is bonded in needle stand In the inner hole at end, the taper hole of needle stand lower end can be screwed on syringe conehead；The lower section of sheath is inlaid in needle stand appearance can not pull-off； It is connected between sheath upper section, lower section with the interconnecting piece of thin-walled；Sheath upper section be U-tube be equipped with latasuture, latasuture inner sidewall extremely It is equipped with the thin-walled locking plate that two panels is inside, tilts down less, locking plate is opposite to intersect the middle line for crossing U-tube, and crosspoint is located at middle line Lower section be close to the bottom of U-tube；Postive stop baffle is installed in the semicircular groove of the bottom of sheath upper section.

The sheath is divided into upper section and lower section, is equipped with side opening or inside prominent ridge in the lower edge of sheath lower section, can be with needle The corresponding protrusion of seat appearance or groove and barb form chimeric fastening；The upper limb side of the sheath lower section is equipped with the company of thin-walled Socket part, upper limb other side are equipped with the monodentate tooth of protrusion.

Respectively there is the limit tooth socket extended downwardly at the bottom of sheath upper section both ends of cracking, and the first tooth socket is that arc can Tooth socket is slipped, the second tooth socket is barb tooth socket；Inner wall in the bottom of sheath upper section is formed with a ring wall groove.In sheath upper section Bottom plane is thinned from originating at connection thin-walled to the inclination of limit tooth socket direction, thickness, plane and primary plane angle a after being thinned 1 ° of >.

The postive stop baffle is the round-meshed baffle being in U-shape, and is mounted in the ring wall groove of the bottom of sheath upper section, It is formed with outwardly extending circular step corresponding with circular hole in the side of baffle, which becomes starting point to opposite side with U-shaped straight line It tilts down, thickness is thinned, gradient b > 2a °；It is formed in the other side of baffle outward, to the inclined arcs of round hole axial, the arc Piece can also be deformed into outward, to the inclined round tube of round hole axial, an or only baffle is not provided with arcs and is not provided with Round tube.

The present invention no longer uses common sheath, reduces component, reduce product packaging due to using single sheath Volume reduces costs, and is readily produced, is easy to use, and is conducive to promote and apply.

Detailed description of the invention

It illustrates: 1- needle stand；The upper end 11- pin hole；The lower end 12- Rule taper hole；13- exterior annular protrusion or groove；14- Barb protrusion；2- helmet；21- lower section；211- crimping；The prominent ridge of 212- annular or side opening；213- mesoporous；Limit teeth 214；Connection Thin-walled 215；22- upper section bottom；221- latasuture；222- ring wall groove；223- bottom bevel；224- limits tooth socket；

Locking plate 225；3- postive stop baffle；31- inner hole；32- tilts closed loop；33- is to axis arcs

Fig. 1 is a kind of integrally-built decomposition diagram of safe injection needle；

Fig. 2 is a kind of jacket structure schematic diagram of safe injection needle；

Fig. 3 is a kind of postive stop baffle structural schematic diagram of safe injection needle；

Fig. 4 is a kind of overall structure diagram of safe injection needle；

Fig. 5 is a kind of using state structure diagram of safe injection needle；

Fig. 6 be a kind of safe injection needle use after blocking structural schematic diagram.

Specific embodiment

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

Shown in Fig. 1, the present invention is made of needle stand 1, needle tubing 15, sheath 2, postive stop baffle 3；Needle tubing 15 is inserted into needle stand upper end Hole 11 is bonded into injection needle；Needle stand lower end has Rule inner hole 12 of standard that can be screwed on syringe conehead；It is formed in needle stand appearance The prominent ridge 13(of annular or annular groove), several barb-like protrusions 14 are formed with above the prominent ridge of annular.

Shown in Fig. 2, sheath 2 divide for upper section 22 and lower section 21, between there is thin-walled 215 to be connected；Lower section 21 has an inner hole 213,1 appearance of needle stand can be sleeved on；It is formed with the prominent ridge of annular or aperture 212 in the bottom outside wall of lower section, it can be with needle stand appearance The prominent ridge 13 of annular or barb 14 form chimeric fastening；A limit teeth 214 are formed in the upper limb side of upper section 21, opposite side is Thin-walled interconnecting piece 215；The bottom side of the other end connection sheath upper section of thin-walled interconnecting piece.

The upper section 22 of sheath is in U-shape pipe, and the straight line side wall of pipe is longitudinally formed with a latasuture 221, and slit width degree is equal to or less than The internal diameter of pipe；The length of pipe is greater than the length of needle tubing 15；The bottom of sheath upper section 22 crack 221 two sides, be respectively formed with one A limit tooth socket 224 bent downward, the first tooth socket of the tooth socket are arc, and the second tooth socket is barb-shaped；The tooth socket is to U-tube The limit teeth (214) that the distance of center line is equal to or slightly less than 21 upper limb of sheath lower section arrive the distance of lower section middle line.

Subtracted in 22 bottom plane of sheath upper section from originating at connection thin-walled 215 to the inclination of limit 224 direction of tooth socket, thickness It is thin, 1 ° of plane and primary plane angle a > after being thinned.

Be formed in the middle part of the upper section 22 of sheath it is a pair of extend downwards, to the midline along the inner wall that cracks and cross center line it is relatively thin Locking plate 225；The crosspoint of two locking plates is located at the lowest point that U-tube is close to below 22 axis of upper section sheath.

Postive stop baffle is the round-meshed baffle being in U-shape as shown in Figure 1；Shown in Fig. 3, it is formed in the side of baffle 3 Outwardly extending circular step 32 corresponding with circular hole 31, the step become starting point with U-shaped straight line and tilt to opposite side, gradient > 2a ° of thickness is thinned；Upward, inside arcs 33 inclined (by axial ray) are formed in the other side of baffle 3, which can become Property for upwards to the inclined round tube of axis, or only a baffle is not provided with arcs and is not provided with round tube.

Fig. 4 is the overall structure diagram of safe injection needle, and in unused state, postive stop baffle 3 is mounted on sheath upper section In the ring wall groove 222 of 22 bottoms, due to the effect on baffle lower edge inclined-plane 32, so that the outside run-off the straight of sheath upper section 22, makes The axis of needle tubing axis runout sheath upper section 22 is obtained, 15 axis of needle tubing is in the top of locking plate 225, and due to postive stop baffle 3 Arcs 33(or round tube) isolation position-limiting action so that sheath 2 is during production and assembly, needle tubing 15 can only according to baffle 3 and Its arcs 33(round tube) direction of guidance covers by sheath upper section 22 and wraps up, and needle tubing 15 cannot be introduced into the lower section of locking plate 225. At this time: sheath lower section 21, which is set with, is mounted in the appearance of needle stand 1, the limiting tooth dental inlay of sheath lower section 21 enter sheath upper section bottom to In first slot of the limit tooth socket of lower bending.

As shown in Figure 5, when in use, with finger pinch sheath upper section 22 to crack 221 to side direction bend sheath, gram The frictional resistance of clothes limit teeth and tooth socket, sheath upper section 22 are opened, and injection needle 15 exposes, meanwhile, needle tubing 15 is limit Position baffle 3 takes half ring groove 222 out of and falls off.

Injecting needle base spinning can be used on syringe conehead.

After injecting diagnosis and treatment, injection needle is extracted, stirs the U-tube back side of sheath upper section 22, to injection needle side with finger To reset, firmly by 225 lower section of intersection locking plate at 22 middle part of needle tubing indentation sheath upper section, shielded completely by sheath upper section 22, together When sheath lower section upper limb limit teeth 214 and sheath upper section bottom limit tooth socket 224 the second barb tooth socket be intermeshed, Stable chimeric locking is formed, being again turned on for sheath upper section 22 is prevented.

The present invention is mounted between the upper section of sheath and lower section using postive stop baffle and its inclined-plane, so that sheath is before use With use rear upper section to change with lower section axis: use before due to baffle ramp effect, sheath upper section axis deviates outward, Injection needle axis is set to be in the outer upper side of locking plate；After use, falling off due to postive stop baffle, the upper section and lower section of sheath Axis generation deviate again so that needle tubing axis be biased to sheath upper section interior side-lower, by the completely obscured limitation of intersection locking plate； Meanwhile the second slot of the limit tooth socket of the limit teeth of sheath lower section upper limb and sheath upper section bottom forms build-in locking, prevents It is reused.

Claims

1. a kind of safe injection needle is made of needle stand (1), needle tubing (15), limit plate (3), sheath (2)；It is characterized by: needle tubing (15) it is bonded in the inner hole (11) of needle stand front end, the taper hole (12) of needle stand lower end can be screwed on syringe conehead；Under sheath Section (21) is inlaid in needle stand (1) appearance can not pull-off；With the interconnecting piece (215) of thin-walled between sheath upper section (22), lower section (21) It is connected；Sheath upper section (22) is U-tube, is equipped with longitudinal latasuture (221) along straight line, and side wall is inside at least provided with two panels, downward Inclined locking plate (225), locking plate is opposite to intersect cross center line, and crosspoint, which is located at below middle line, is close to sheath upper section U-shaped bottom； Postive stop baffle (3) are installed in the semicircular groove (222) of the bottom of sheath upper section.

2. a kind of safe injection needle according to claim 1, it is characterised in that: sheath is divided into upper section (22) and lower section (21), Be equipped with side opening or inside prominent ridge (212) in the lower edge of sheath lower section, can protrusion corresponding with needle stand appearance or groove (13) and Barb (14) forms chimeric fastening；The upper limb side of the sheath lower section (21) is equipped with the interconnecting piece (215) of thin-walled, and upper limb is another Outer side is equipped with the monodentate tooth (214) of protrusion.

3. a kind of safe injection needle according to claim 1, it is characterised in that: opened in the bottom of the sheath upper section (22) Respectively there is the limit tooth socket (224) for bending downward extension at the both ends of seam, and the first tooth socket is that arc can slip tooth socket, the second tooth socket For barb tooth socket；Inner wall in the bottom of sheath upper section (22) is formed with a ring wall groove (222)；In sheath upper section (22) bottom Plane is thinned from originating at connection thin-walled (215) to the inclination of limit tooth socket (224) direction, thickness, plane and Yuanping City after being thinned 1 ° of face angle a >.

4. a kind of safe injection needle according to claim 1, it is characterised in that: what the postive stop baffle (3) was in U-shape has circle The baffle in hole (31), in the mountable ring wall groove (222) in sheath upper section (22) bottom, the side of baffle (3) be formed with The corresponding outwardly extending circular step (32) of circular hole (31), the step with U-shaped straight line become starting point to be sloped downwardly, it is thick Degree is thinned, gradient b > 2a °；Outside, the inclined arcs of Xiang Yuankong (31) axis (33), the arc are formed in the other side of baffle (3) Piece can also be deformed into outside, the inclined round tube of Xiang Yuankong (31) axis (33), or an only baffle (3), be not provided with Arcs and it is not provided with round tube.