CN201290968Y

CN201290968Y - Simple self-destruction type syringe

Info

Publication number: CN201290968Y
Application number: CNU2008201788322U
Authority: CN
Inventors: 冯忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-16
Filing date: 2008-11-16
Publication date: 2009-08-19
Anticipated expiration: 2018-11-16

Abstract

The utility model relates to a simple self-destructive syringe which comprises a protective cover, a needle seat, a tube, a push rod and a sealing plug; the parts of the simple self-destructive syringe are the same with the common disposable syringe, and the self-destructive function is realized by the structure design improvement of the parts; the needle seat is adhered with a needle tip, provided with a needle seat plug, a concave ring and a circular ring edge; the tube is provided with a large through hole, a tube body, a convex ring, a small through hole, a tube guiding arc, a circular arc-shaped elastic trip, a protective edge, a rear terrace and a press handle D1; the push rod is provided with an elastic slot, an elastic hook, a sealing cylinder, a positioning bar A, a positioning bar B, a vent groove, a sealing plug pulling ring, a retaining ring, a break point, an elastic occulting bar, and a push rod press handle D2; the sealing plug is provided with a small central through hole, a sealing plug guiding arc, a large central through hole and a sealing plug terrace; and the simple self-destructive syringe is convenient to be used, has low manufacturing cost, can be fully automatically assembled, and realizes industrial production.

Description

Simple self-destruction syringe

Technical field

The present invention relates to a kind of simple self-destruction syringe, belong to medical syringe.

Background technology

At present, domestic and international manufacturing enterprise, medical institutions or individual are in order to want to stop to reuse syringe, reach the requirement of safety injection, simultaneously in World Health Organization (WHO), world United Nations Children's Fund and world population are organized the foundation joint statement: require the whole world to use self-destruction syringe as early as possible, a lot of enterprises or individual have designed various not in specie self-destruction syringes, locking type is arranged, the spring chip, puncture type a lot of, but to make the medical worker easy to use, and low cost of manufacture, can form production in enormous quantities again, technology is simple, and the self-destruction syringe that production efficiency is high haves much room for improvement.The patent No. of China's Wuxi Yushou Medical Equipment Co., Ltd design is that this self-destruction syringe of ZL200520011459.8 uses in the many provinces and cities of China, and a lot of in the world simultaneously countries use.But owing on the push rod stainless steel spring non return part will be installed, recruitment is more, and it is just big to reach 500,000,000,1,000,000,000 or greater number difficulty, it is few to solve personnel selection, and cost is low, and output is big, and the self-destruction syringe that the medical worker is easy to use with the automatic equipment assembling, haves much room for improvement fully.For solving above deficiency, the invention provides a kind of simple self-destruction syringe, can satisfy above insufficient requirement.

Summary of the invention

The object of the present invention is to provide a kind of simple self-destruction syringe, more particularly it and general expression disposable syringe parts are much at one.It is made up of sheath, needle stand, cylindrical shell, push rod, sealing-plug, and the self-destruction form is to be improved on the functional structure, and manufacturing cost is reduced greatly.

In order to solve above whole rational overall process, the present invention is achieved by the following technical solutions: a kind of simple self-destruction syringe, this syringe comprises the needle stand part, be stained with needle point on the needle stand, there is the needle stand plug of a through hole at the needle ingot shaft center, in the middle of the needle stand inwall needle stand scrobicular ring is arranged, there is an annulus edge rear end; Shell portion, cylindrical shell is the hollow syringe of the medial wall of a cylinder, top axial has a large through-hole less than the cylindrical shell external diameter, one circle cylindrical shell bulge loop is arranged on the large through-hole outer wall, large through-hole rear end connecting cylinder body portion axially has a small through hole less than large through-hole excessively to connect with cylindrical shell guiding arc, be provided with the arc-shaped elastic sheet before the small through hole, barrel front end is parallel to large through-hole and greater than the large through-hole edge of encircling for protection, its height that protects the edge is lower than the ring edge of needle stand, protect along inner ring and needle ring along external diameter close-fitting or bonding mutually, cylinder back-end has a backward step by the hands place, backward step can be set on the intravital a certain position of tube according to specified liquid dose, be printed with graduation mark on the cylinder body outer wall and observe boost line, the rearmost end inwall is provided with certain angle D1; Pusher section, described push rod top is provided with elastic groove, elastic hook, sealing cylinder, sealing cylinder is connected with positioning strip A, positioning strip B, positioning strip A, positioning strip B are connected on the sealing-plug draw ring of push rod, and an air channel is arranged on the sealing-plug draw ring, and ring is moved back in the resistance that is provided with a slice circle near sealing-plug draw ring place, move back the ring place near resistance and be provided with a snap point, be provided with two elasticity blend stops by the rear end by the hands place, elasticity blend stop fore-end is provided with certain angle D2, and is identical with the angle of D1 on the cylindrical shell; The sealing-plug part, the sealing-plug top is provided with an axial little central through hole, little central through hole links to each other with sealing-plug guiding arc, the bottom is provided with an axially big central through hole, be provided with the sealing-plug step simultaneously, its sealing-plug is installed on the top of push rod, and the little central through hole of sealing-plug is fastened on the sealing cylinder on the push rod and seals, be positioned at cylindrical shell with push rod, stop forward impelling when the D2 place contacts with cylindrical shell D1 place on the push rod during assembling, another kind of its needle stand of style of this plain type syringe is provided with the needle stand plug, its push rod head does not have elastic groove, the sealing cylinder front end is formed with a circle or two circle rings, more reasonable with two circle rings, can be safer be repeated used, because when injecting liquid drug also has a certain amount of medicinal liquid, first ring has entered the large through-hole of barrel front end by the circular arc flexure strip, as embraced by the circular arc flexure strip of barrel front end when wanting to pull back, positioning strip A when pulling at, positioning strip B can break, injecting liquid drug finishes, second ring is same as described above equally, it should be noted that in addition, the medical worker draws and requires is that specified nominal capacity can be according to the syringe of different size milliliter, draw the nominal capacity that has satisfied regulation when medicinal liquid is extremely assisted observation line, this simple self-destruction syringe is rational in infrastructure, and is easy to use, low cost of manufacture, assembling can form industrialization production fully automatically.

Description of drawings

Fig. 1 is an overall structure sketch map of the present invention

Fig. 2 is the sketch map of needle stand part

Fig. 3 is the sketch map of shell portion

Fig. 4 is the sketch map of pusher section

Fig. 5 is Fig. 4 push rod head view

Fig. 6 is the enlarged drawing of Figure 1A portion

Fig. 7 is the sketch map of sealing-plug part

Fig. 8 is the enlarged drawing of Figure 1B portion

Fig. 9 is that medicinal liquid has been injected the sketch map that finishes

Figure 10 is the sketch map that sealing cylinder has ruptured and broken away from the push rod

Figure 11 is the sketch map of cylindrical shell appearance printing scale line

Figure 12 is the sketch map of another kind of needle stand

Figure 13 is the sketch map of another kind of push rod

1 sheath among the figure, 2 needle stands, 3 cylindrical shells, 4 push rods, 5 sealing-plugs, 6 large through-holes, 7 cylindrical shell bulge loops, 8 arc-shaped elastic sheets, 9 protect the edge, 10 small through hole, 11 cylindrical shells guiding arc, 12 backward steps, 13 press hands, 14 sealing cylinders, 15 air channels, 16 sealing-plug draw rings, 17 elasticity blend stops, 18 push rods are pressed hands, 19 little central through holes, 20 sealing-plugs guiding arc, 21 big central through holes, 22 sealing-plug steps, ring is moved back in 23 resistances, 24 elastic hooks, 25 elastic grooves, 26 needle stand plugs, 27 needle stand scrobicular rings, 28 annulus edges, 29 needle points, 30 ring steps, 31 snap point, 32 auxiliary observation lines

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples, and referring to accompanying drawing: simple self-destruction syringe of the present invention has: sheath 1, needle stand 2, cylindrical shell 3, push rod 4, plug 5 are formed.Be stained with needle point 29 on its needle stand 2, be provided with needle stand plug 26, needle stand scrobicular ring 27, annulus simultaneously along 28, cylindrical shell 3 is provided with large through-hole 6, cylindrical shell bulge loop 7, arc-shaped elastic sheet 8, protect along 9, small through hole 10, cylindrical shell guiding arc 11, backward step 12, press hands 13 and D1, push rod 4 is provided with positioning strip A and positioning strip B, air channel 15, sealing-plug draw ring 16, elasticity blend stop 17, push rod move back ring 23, elastic hook 24, elastic groove 25, snap point 31 and D2 by hands 18, resistance, and sealing-plug 5 is provided with little central through hole 19, sealing-plug guiding arc 20, big central through hole 21 and sealing-plug step 22

During assembling, needle stand 2 is stained with needle point 29, packages sheath 1 and is installed in cylindrical shell 3 heads together, and its needle stand scrobicular ring 27 is tight with on the cylindrical shell bulge loop 7, because ring is higher than the height that protects on the cylindrical shell along 9 along 28 height on the needle stand, so compacting fully during assembling.Encircling along 28 outsides owing to protecting along 9 armfuls in addition, needle stand is difficult for being removed, if add the more firm safety of binding agent, needle stand and cylindrical shell almost completely are integral.The elastic hook 24 of push rod 4 heads is by the little central through hole 19 of sealing-plug 5 then, because sealing-plug is provided with sealing-plug guiding arc 20, so elastic hook 24 is easy to be passed through during assembling.Again because sealing-plug is an elastomeric material, so sealing-plug draw ring 16 also is easy to enter sealing-plug step 22 on the push rod, at this moment, the little central through hole 19 of sealing-plug has been fastened on the sealing cylinder 14 on the push rod, is installed into together when D1 contacts with D2 on the push rod to cylindrical shell in the cylindrical shell to have become certain frictional force to stop inside propelling.

Because the little central through hole 19 of sealing-plug hugs on push rod seal cylinder 14, both seal, when so medical personnel use directly the imbibition push rod pull back, can not push ahead, to cause self-destruction in case push ahead, can directly inject after waiting to have drawn required medicinal liquid deaeration, because certain pressure is arranged during the injection human body, the patient has no way of and strengthens pain in unexpected acceleration so injecting liquid drug finishes, reason is: one, since on elastic groove 25 on the push rod and the cylindrical shell arc-shaped elastic sheet 8 the two all playing an elastic variation, so frictional force is very little; Two, the elasticity blend stop on the push rod is strain equally, and pressure is minimum.The power that one and two has added the almost pressure when the human injection equates, so injection is very steady, what solved many other self-destruction syringes strengthens the difficult problem that the patient keenly feels because acceleration causes.Because the patent of other self-destruction syringes all adds the location screening glass on push rod, to pull out the location screening glass during use and just can inject simultaneously, strengthen medical personnel's labor intensity and operating procedure.

This simple self-destruction syringe, when elastic hook 24 or ring step 30 (the another kind of pattern push rod of simple self-destruction syringe, see Figure 13) enter in the large through-hole 6 by arc-shaped elastic sheet 8 in the cylindrical shell, it is the onset of self-destruction performance, if this moment, push rod was thought to pull back once more, because the diameter of arc-shaped elastic sheet 8 is less than the diameter of elastic hook 24 or ring step 30 on the cylindrical shell, add arc-shaped elastic sheet 8 to intracardiac inclination of week, draw and more be out of shape and hug small column positioning strip A after certain strength, sealing-plug draws 16 ring fractures to break away from positioning strip B and the push rod, this moment, sealing cylinder 14 and elastic hook 24 were locked in the large through-hole 6, push rod also can be fractureed and can not be reused, and sees Figure 10.

The another kind of pattern of simple self-destruction syringe, its push rod and needle stand such as Figure 12, Figure 13, other parts are the same with first kind of pattern.

Claims

1, a kind of simple self-destruction syringe comprises: the needle stand part, be stained with needle point on the described needle stand, and there is the needle stand plug of a through hole at the needle ingot shaft center, and a circle scrobicular ring is arranged in the middle of the needle stand inwall, and there is an annulus edge rear end; Shell portion, described cylindrical shell is the hollow syringe of the medial wall of a cylinder, top axial has a large through-hole less than the cylindrical shell external diameter, one circle cylindrical shell bulge loop is arranged on the large through-hole outer wall, large through-hole rear end connecting cylinder body portion axially has a small through hole less than large through-hole, its small through hole excessively connects with cylindrical shell guiding arc, the small through hole front end is provided with the arc-shaped elastic sheet, barrel front end is parallel to large through-hole and greater than the large through-hole edge of encircling for protection, its height that protects the edge is lower than the ring edge of needle stand, protect along inner ring and needle ring along external diameter close-fitting or bonding mutually, cylinder back-end is near by the hands place one backward step being arranged, backward step can be set on the intravital a certain position of tube according to specified liquid dose, and the rearmost end inwall is provided with certain angle D1; Pusher section, described push rod top is provided with elastic groove, elastic hook, sealing cylinder, sealing cylinder and positioning strip A, positioning strip B is connected, and positioning strip A, B are connected on the sealing-plug draw ring of push rod, one air channel is arranged on the sealing-plug draw ring, be provided with the circular resistance of a slice near sealing-plug draw ring place and move back ring, move back the ring place by circular resistance and be provided with a snap point, be provided with two elasticity blend stops by the hands place by the rear end, elasticity blend stop fore-end is provided with certain angle D2, and is identical with the angle of D1 on the cylindrical shell; The sealing-plug part, the sealing-plug top is provided with an axial little central through hole, little central through hole links to each other with sealing-plug guiding arc, the bottom is provided with an axially big central through hole, be provided with the sealing-plug step simultaneously, its sealing-plug is installed on the top of push rod, and the little central through hole of sealing-plug is fastened on its sealing function on the sealing cylinder on the push rod, be positioned at cylindrical shell with push rod, stop forward impelling when the D2 place contacts with cylindrical shell D1 place on the push rod.

2, according to claim 1, described simple self-destruction syringe, it is characterized in that: arc-shaped elastic sheet bottom is greater than the vertical diameter dimension of arc-shaped elastic sheet with the diameter dimension of small through hole junction, and the arc-shaped elastic sheet is centroclinal to axle, and flexure strip can be that two lobes or many lobes are formed.

3, according to claim 1, described simple self-destruction syringe, it is characterized in that: positioning strip A and positioning strip B that the sealing-plug draw ring upper end on push rod is connected with sealing cylinder, positioning strip A forms by two, positioning strip B is a wall scroll, be provided with an air channel on the opposite in positioning strip B axle center, air channel extends to the axle center from sealing-plug draw ring edge.

4, according to claim 3, described simple self-destruction syringe is characterized in that: positioning strip A becomes vertical direction with positioning strip B, and promptly positioning strip B is perpendicular to positioning strip A.

5, according to claim 3, described simple self-destruction syringe, it is characterized in that: the inclined to one side centrage of crossing of positioning strip A, one side by air channel, and positioning strip B is at the another side of this centrage, positioning strip A and positioning strip B make positioning strip more stable with being connected of push rod with head portion not on same straight line.

6, according to claim 1, described simple self-destruction syringe, it is characterized in that: it is to be linked to be an auxiliary observation line with several points that barrel outer surface is printed with scale line, scale line the last item line, and this straight line is that the push rod that expression has a sealing-plug can determine to have reached nominal capacity backward during imbibition.

7, according to claim 1, described simple self-destruction syringe is characterized in that: front end also can have one or two ring steps on the push rod positioning strip forward end seal cylinder.