CN1252311A

CN1252311A - Safety syringe with improved structure

Info

Publication number: CN1252311A
Application number: CN 99125178
Authority: CN
Inventors: 黄吴顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-29
Filing date: 1999-11-29
Publication date: 2000-05-10
Anticipated expiration: 2019-11-29
Also published as: CN1127358C

Abstract

The invention relates to a safety syringe with an improved structure, which comprises a needle cover, a needle cylinder, a needle seat, a piston, a push rod and an injection needle. The syringe needle is fixed on the needle seat, the needle seat is sleeved on the top end of the syringe, the neck part of the front end of the push rod in the syringe is sleeved with a hollow soft piston, and the piston is slightly deformed when being pushed to the bottom of the syringe, so that the push rod can be continuously pushed to release the syringe liquid from the needle seat completely. The front end of the push rod is provided with an elastic hook, the inner edge of the bottom end of the needle seat is provided with a pawl, and when the push rod is pushed, the side edge of the hook is smoothly embedded with the pawl, so that the push rod can be pulled back by force, and the needle seat and the needle head can be retracted into the needle cylinder. Safe use, no residual injection or blood, and effective overcoming of secondary pollution.

Description

Improve the safety injector of structure

The present invention relates to a kind of medical equipment, a kind of more precisely safety injector.

Employed syringe in the medical treatment, former is to reclaim to use, though sterilize completely through strictness with finishing at every turn, the incomplete phenomenon of sterilization is always arranged unavoidably, thereby has the hidden danger of superinfection.At present, the disposable syringe that employed syringe has promptly abandoned after having developed into and having used in the medical treatment, but a large amount of depleted syringes have then produced the problem of new environmental pollution and safety aspect again, and the syringe needle of discarded syringe, it is exposed outside not add any disposal, scratch easily medical care or cleanup crew, cause virus or antibacterial with the syringe infection etc.The various syringe needles of studying for addressing the above problem can be destroyed the syringe of formula, and its major function also is for the needle sting personnel's that prevent discarded syringe.As a kind of safety injector, establish an outstanding trip at the plunger place, trip is engaged with the needle stand afterbody, again needle stand and entry needle are returned in the syringe together, and destroy after making the entry needle bending.This design, though improved the deficiency of stabbing the personnel aspect easily, but produced shortcoming on the other hand, the trip of promptly working as plunger is fashionable with the needle stand trailer card, toward contact remnants a small amount of medicinal liquid is arranged between plunger and syringe, and trip formed airtight space when contacting with the needle stand afterbody, will cause being hooked in and the fashionable formation obstacle of needle stand trailer card of plunger, can't engage smoothly, so when clinical use, medical personnel must extract entry needle out earlier in patient's body, trip propelling with plunger engages with the needle stand afterbody again, but between this moment syringe with entry needle in remaining medicinal liquid and patient's blood, also can and take out of, thereby form another kind of pollution channel along with the propelling action of plunger.

The objective of the invention is to design a kind of safety injector that improves structure, can make and not stay remaining injection in the syringe, get rid of blood fully and reflux, to prevent secondary pollution, also needn't earlier entry needle be extracted from human body and push against push rod again, and can improve the vibrations that produce because of firmly.

The object of the present invention is achieved like this: a kind of safety injector that improves structure, comprise pin lid, syringe, needle stand, piston, push rod and syringe needle, described needle stand is the pedestal of fixed needle, needle stand is set in the top end of syringe, described push rod is inserted in the syringe, it is characterized in that: the exhausted portion of the upper end inner edge place handicapping of described syringe, the needle cylinder type of the exhausted portion of approaching group is jaw portion circlewise; Needle stand tail end inner edge forms the sour jujube of pulling of arcuation; Described push rod forms cervical region in leading portion, and the elasticity that the cervical region top is formed with taper is pulled and colluded; Described piston is a flexible material, is provided with the accommodation space that runs through in the piston, and piston is set on the cervical region of push rod.

Also include capel on the described needle stand, needle stand is set in the syringe top end, and capel blocks mutually with the portion of blocking of syringe.

The elasticity of described taper is pulled to collude and is provided with groove.

The elasticity of described taper is pulled and is colluded inner hollow.

The present invention improves the safety injector of structure, utilize the cervical region of syringe inner push-rod to wear piston, piston then can adopt the soft rubber material, when piston is pushed to the syringe afterbody, push rod can push against to the previous crops secondary in piston once more, injection in the syringe is injected fully, and the pulling of push rod colluded the sour jujube of pulling with needle stand through the secondary pushing and pressing and tabling is fixed, not travelling backwards again, can get rid of blood fully refluxes, so can be on pin prop up remained blood, it is clean keeping pin to prop up, to prevent secondary pollution.

The present invention improves the safety injector of structure, its push rod front end cervical region place is worn by a piston, and piston is when being pushed to the syringe afterbody, push rod can push against to the previous crops secondary in piston once more, make pulling on the push rod collude with needle stand in the sour jujube tabling of pulling fix, the syringe that can prevent traditional structure forms airtight phenomenon when arriving at the bottom, make push rod be subjected to the medicinal liquid can not compressed resistant function in the syringe endogenous cause of ill, and the shortcoming that medicinal liquid can't be injected fully.

The present invention improves the safety injector of structure, pulling of its push rod front end colluded, because of offering groove or hollow has telescopic resilience, collude when pulling will with pull the sour jujube tabling fixedly the time, pull the groove that colludes or ducted body can in contract, pull that colluding takes advantage of a situation with its conical surface and enter pull sour jujube and with it tabling fix, therefore needn't strengthen the application of force, also need not entry needle extracted from human body in advance and push against push rod again, also can improve the shock conditions because of firmly producing when using the traditional structure syringe.

Further specify technology of the present invention below in conjunction with embodiment and accompanying drawing.

Fig. 1 is the three-dimensional appearance structural representation of safety injector of the present invention

Fig. 2 is the three-dimensional decomposition texture sketch map of safety injector needle stand of the present invention, piston, push rod

Fig. 3 is the combinative structure enlarged diagram of safety injector needle stand of the present invention, piston, push rod

Fig. 4 is the combinative structure sketch map of safety injector needle stand of the present invention, piston, push rod

Fig. 5 is the combinative structure sketch map of safety injector of the present invention

Fig. 6 is another example structure sketch map of pulling in the safety injector of the present invention and colluding

In the diagram, the 10th, pin lid, the 11st, syringe, the 12nd, support portion, the 13rd, block portion, the 14th, ring-type jaw portion, the 15th, prominent ring, the 20th, needle stand, the 21st, through hole, the 22nd, piston part, the 23rd, capel, the 24th, the sour jujube of pulling, the 30th, piston, the 31st, accommodation space, the 40th, push rod, the 41st, push away the portion of holding, the 42nd, cervical region, the 43rd, pull and collude, the 44th, groove, the 50th, entry needle.

Referring to Fig. 1, Fig. 2, the safety injector of improvement structure of the present invention comprises pin lid 10, syringe 11, needle stand 20, piston 30, push rod 40 and entry needle 50 (see figure 5)s.Wherein pin lid 10 and entry needle 50 are identical with the syringe of traditional structure, repeat no more.

Referring to Fig. 3 to Fig. 6, and combination is referring to Fig. 1, Fig. 2.The bottom of syringe 11 is support portions 12 among Fig. 1, Fig. 5, and the inner edge place of syringe 11 upper ends is portions of blocking 13 among Fig. 4, Fig. 5, forms ring-type jaw portion 14 near the syringe 11 that blocks portion 13 places, establishes prominent ring 15 in the bottom of syringe 11 inner radius.Among Fig. 2 to Fig. 5, needle stand 20 is fixing pedestals of entry needle 50, be set in the top end of syringe 11, block mutually with the portion of blocking 13 with capel 23, constitute a through hole 21 and a piston part 22 on it, be fixing entry needle 50 and for the current part of injection, 22 tail end place forms the overhead kick shape sour jujube 24 of pulling in the piston part.Piston 30 among Fig. 2, Fig. 3 is made by the soft rubber material, and its inside is an accommodation space that runs through 31.The tail end of push rod 40 is the portions of holding 41 (seeing Fig. 2, Fig. 5) that push away, and constitutes cervical region 42 near the front end place, forms pulling of taper in cervical region 42 upper ends and colludes 43, pulls to collude and establishes groove 44 on 43, as shown in Figure 3.

Said elements is when combination, needle stand 20 is set on the top of syringe 11, block the location with capel 23 mutually with the portion of blocking 13, entry needle 50 is set on needle stand 20 simultaneously, piston 30 then is sheathed on cervical region 42 places of push rod 40 in advance, 40 whole ground of push rod are inserted by syringe 11 rear ends, and always with piston 30 pushing and pressing to the position of fitting with ring-type jaw portion 14, form resting state.

After entry needle 50 thrusts in the human body, utilize the portion of holding 41 that pushes away of push rod 40 slowly to bestow thrust, liquid medicine injection is injected in the human body, when piston 30 is pushed to ring-type jaw portion 14 places, the pulling of push rod 40 front ends colluded 43 and also is positioned at sour jujube 24 outsides of pulling, as shown in Figure 3, at this moment, liquid medicine injection major part enters in the human body (and the piston of traditional structure entry needle, at this moment because of forming airtight space between residual liquor and syringe, medicinal liquid can't be compressed, push rod also can't readvance, when will being fastened with the needle stand afterbody, the trip of plunger forms obstacle, can't engage smoothly, so remake engaging after entry needle need being extracted in advance, the significant drawback that promptly causes residual liquor thereupon to be taken out of), because the present invention improves the piston 30 of structure, it is the cervical region 42 of being located at push rod 40 in the mode of wearing, so push rod 40 still can be carried out forward, entry needle need not to extract human body and implements pushing and pressing action for the second time, residual injection just can be injected in the human body, and piston 30 slightly by compression, to pull simultaneously and collude 43 and be embedded to sour jujube 24 inboards of pulling, as Fig. 4, shown in Fig. 5, make the push rod 40 can travelling backwards by chimeric location, this moment, entry needle 50 was when extracting, collude 43 because of pulling and engaged with the sour jujube 24 of pulling, do not take out of so just do not have residue liquid medicine injection and blood on the entry needle 50, and can not cause secondary pollution.

When push rod 40 is implemented the secondaries pushing and pressing, mainly be that order is pulled and colluded 43 and embed the inboard of sour jujube 24 of pulling, and utilize designed groove 44, order is pulled and is colluded 43 and have elasticity, be easy to enter and pull in the sour jujube 24, and make push rod 40 be the stable shape that advances, can not produce unexpected impulse force, make patient's discomfort, also not can because of entry needle 50 when extracting, because of push rod 40 is pulled back slightly, and with suctioned blood to entry needle 50, can get rid of secondary pollution fully, keep syringe 11 cleanings.Particularly, this is pulled and colludes 43 and adopt tapers and be provided with groove 44, making pulls collude 43 laborsaving and smooth and easy when inboard pull sour jujube 24 of embedding.On the other hand, the inner edge of sour jujube 24 of pulling is made as the circular arc limit, outer rim is made as flat condition, make and pull when colluding 43 inlay cards, easily go into difficulty and go out, can direct inlay card so need not that entry needle is extracted human body, and behind the inlay card, as long as the application of force just can be returned to needle stand 20 in the syringe a little, as shown in Figure 5, form the syringe of an overall safety.

Pull and collude on 43 except can designing groove 44, also can be designed to the taper of inner hollow, as shown in Figure 6, pull with order and to collude 43 and have elasticity, can be laborsaving smooth and easy in the time of in entering the sour jujube 24 of pulling, then engaging is firmly behind the inlay card.Therefore, according to this design philosophy, also can design with pulling and collude 43 and have the structure that equates effect.

The safety injector of improvement structure of the present invention also is applicable to the syringe of subcutaneous tissue or blood vessel formula.

In sum, the structure of needle stand, piston and push rod etc. need not entry needle is pulled out in advance in the syringe of the present invention Go out human body and just can directly carry out the secondary pushing and pressing, the parenteral solution in the syringe can be injected fully, can be not residual, and Can because the application of force produces the human body discomfort or take soup out of when extracting, not compare its technology with the syringe of traditional structure Obvious progress is arranged.

Claims

1, a kind of safety injector that improves structure, comprise pin lid, syringe, needle stand, piston, push rod and syringe needle, described needle stand is the pedestal of fixed needle, needle stand is set in the top end of syringe, described push rod is inserted in the syringe, it is characterized in that: the exhausted portion of the upper end inner edge place handicapping of described syringe, the needle cylinder type of the exhausted portion of approaching group is jaw portion circlewise; Needle stand tail end inner edge forms the sour jujube of pulling of arcuation; Described push rod forms cervical region in leading portion, and the elasticity that the cervical region top is formed with taper is pulled and colluded; Described piston is a flexible material, is provided with the accommodation space that runs through in the piston, and piston is set on the cervical region of push rod.

2, a kind of safety injector that improves structure according to claim 1, it is characterized in that: also include capel on the described needle stand, needle stand is set in the syringe top end, and capel blocks mutually with the portion of blocking of syringe.

3, a kind of safety injector that improves structure according to claim 1 and 2 is characterized in that: the elasticity of described taper is pulled to collude and is provided with groove.

4, a kind of safety injector that improves structure according to claim 1 and 2, it is characterized in that: the elasticity of described taper is pulled and is colluded inner hollow.