The overall plastic pin syringe needle that makes up a prescription
Technical field
This utility model belongs to technical field of medical instruments, relates to a kind of overall plastic pin syringe needle that makes up a prescription
Background technology
Medical personnel are when infusing to patient, need configuration medicinal liquid earlier, at present, preparating liquid uses disposable syringe mostly clinically, be that the hand-held disposable syringe of medical personnel extracts water for injection or diluent, inject dissolving or dilution medicine in the medicine bottle, after medicine is fully dissolved, draw again and inject in the infusion bottle.In the suction process, owing to dose in the medicine bottle reduces to produce negative pressure, the difficulty of extraction also increases gradually, and the medicinal liquid in the bottle is difficult for draining only, and reality has reduced the injection dose, does not reach due therapeutic effect.In addition, when injecting medicinal liquid toward infusion bottle, along with the increase of dose, its pressure is also increasing in the infusion bottle, so the strength of medical personnel's injection liquid also needs and then to increase, and has brought very big difficulty for the work of making up a prescription.
And, at present the employed syringe needle that makes up a prescription mainly is that plastic spike seat and metal needle tubing are adhesively fixed and form, but the complex manufacturing technology of metal needle tubing wherein, plastic spike seat and the needed adhering and solidifying time between it have not only restricted output, and do not satisfy and make requirement cheaply, the metal needle tubing uses and also is difficult for later reclaiming, and also is unfavorable for environmental protection.
Summary of the invention
The purpose of this utility model is at the existing the problems referred to above of the existing syringe needle that makes up a prescription, and has proposed a kind of low-cost production that realizes, makes the overall plastic simply and easily pin syringe needle that makes up a prescription.
The purpose of this utility model can realize by following technical proposal: a kind of overall plastic pin syringe needle that makes up a prescription, comprise that one had the spike body of liquid passage, one end of described spike body is piped needle section, the other end is to be used for the needle stand portion that is connected with dispensing instrument, have on the needle section when making up a prescription and to make the air guide channel that gas communicates with ambient atmos in the medicine bottle, it is characterized in that described spike body adopts plastic material to be made, above-mentioned needle section and needle stand portion are integral structure.
The whole syringe needle that makes up a prescription adopts plastic material to make, and needle section wherein and needle stand portion are integral structure and can reach low-cost production and make purpose simply and easily.Medicine bottle internal gas pressure and ambient pressure kept relative equilibrium when air guide channel can guarantee to make up a prescription again.
In above-mentioned overall plastic pin made up a prescription syringe needle, described air guide channel was an air slot, axially is opened in the needle section surface.
In above-mentioned overall plastic pin makes up a prescription syringe needle, described spike body also comprises protrudes the socket part that is arranged on the needle section outer surface, this socket part adopts plastic material to make equally, and be integral structure with above-mentioned needle section and needle stand portion, have on the described socket part and can make things convenient for the socket part together to insert spigot surface in the medicine bottle with needle section.
In the process of making up a prescription, the gas in the medicine bottle can communicate with the external world by air guide channel.When extracting medicinal liquid in medicine bottle, the pressure in the medicine bottle can reduce, and this moment, ambient atmosphere added in the medicine bottle by air guide channel, makes air pressure and ambient pressure in the medicine bottle keep balance.When injecting medicinal liquid in medicine bottle, the pressure in the medicine bottle can increase, and the interior gas of medicine bottle this moment is discharged by air guide channel, makes air pressure and ambient pressure in the medicine bottle keep balance.The plug of needle section penetration of vials is inserted into when carrying out dispensing operation in the medicine bottle, and the spigot surface on the socket part can make things convenient for the socket part together to insert in the medicine bottle with needle section, plays the effect that reduces resistance.
In above-mentioned overall plastic pin made up a prescription syringe needle, described air guide channel was an air slot, and this air slot axially is opened in the outer surface of socket part.Because air slot is opened in the outer surface of socket part, air slot all can carry out exchanging into and out of gas with the part that needle section is inserted in the medicine bottle.So, even if an end of air slot is inserted into the work that also can not have influence on equilibrium air pressure in the medicinal liquid.
In above-mentioned overall plastic pin made up a prescription syringe needle, described air guide channel was a vent cap, and this vent cap axially is opened in inside, socket part, and surface, above-mentioned socket part offers passage one and the passage two that is communicated with this vent cap.Vent cap is arranged on inside, socket part, and after medicine bottle was inserted in the socket part, two of vent cap was communicated with passage one and passage two respectively, and passage one and passage two lay respectively at inside and outside the medicine bottle, and gas in the medicine bottle and ambient atmos are conducted.And because vent cap is opened in the inside of socket part, so the outer wall of socket part is more smooth, the resistance in the time of can reducing socket part insertion medicine bottle.
In above-mentioned overall plastic pin makes up a prescription syringe needle, have the shoulder block that protrudes laterally in the described needle stand portion, offer one on the shoulder block and cross the gas passage, this end of crossing the gas passage is communicated with described air guide channel, and the opening of the other end is positioned at the sidepiece of needle stand portion.
Shoulder block plays position-limiting action, prevents that the socket part from inserting when inserting medicine bottle deeply and whole section air guide channel all is inserted in the medicinal liquid.When the socket part was inserted medicine bottle to the shoulder block of needle stand portion and leaned on plug, the air guide channel on the socket part all was inserted in the medicine bottle, and gas communication is finished in crossing the gas passage and air guide channel and atmosphere can be communicated with on this moment shoulder block.Because an opening crossing the gas passage is positioned at the sidepiece of needle stand portion, therefore when shoulder block leans on plug, on this opening can not be blocked, can guarantee that air guide channel is communicated with atmosphere all the time.
In above-mentioned overall plastic pin made up a prescription syringe needle, described spigot surface was tapered, and was positioned at the end that an end of medicine bottle is inserted in the socket part.
Compared with prior art, this overall plastic pin syringe needle that makes up a prescription all adopts plastic material to make, so production cost is lower.Needle section, needle stand portion and socket part etc. all are integral structure, and processing technology is simple and convenient.Simultaneously, can carry out gas communication with extraneous conducting with medicine bottle is inner when making up a prescription, make air pressure and ambient pressure in the medicine bottle remain balance, the work of making up a prescription saves time, laborsaving, greatly facilitates medical personnel, alleviated their labor intensity.During dispensing operation the situation that overflow of drug fluid causes drug waste and pollution can not appear.
Description of drawings
Fig. 1 is the make up a prescription sectional structure sketch map of syringe needle of this overall plastic pin among the embodiment one.
Fig. 2 is the make up a prescription side-looking structural representation of syringe needle of this overall plastic pin among the embodiment one.
Fig. 3 is this overall plastic pin sketch map of syringe needle when carrying out dispensing operation that make up a prescription among the embodiment one.
Fig. 4 is the make up a prescription sectional structure sketch map of the another kind of scheme of syringe needle of this overall plastic pin among the embodiment one.
Fig. 5 is the make up a prescription sectional structure sketch map of syringe needle of this overall plastic pin among the embodiment two.
Fig. 6 is the make up a prescription side-looking structural representation of syringe needle of this overall plastic pin among the embodiment two.
Fig. 7 is this overall plastic pin sketch map of syringe needle when carrying out dispensing operation that make up a prescription among the embodiment two.
Among the figure, 1, needle section; 11, cross the liquid passage; 2, socket part; 22, spigot surface; 23, air slot; 3, needle stand portion; 31, shoulder block; 31a, mistake gas passage; 4, plug; 5, medicine bottle; 6, vent cap; 61, passage one; 62, passage two.
The specific embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but this utility model be not limited to these embodiment.
Embodiment one
As depicted in figs. 1 and 2, this overall plastic pin syringe needle that makes up a prescription comprises that one had the spike body of liquid passage 11, and the inner of spike body is piped needle section 1, and the outer end is to be used for the needle stand portion 3 that is connected with dispensing instrument, and the outer surface of needle section 1 also has socket part 2.In the present embodiment, needle section 1, socket part 2 and needle stand portion 3 all adopt plastic material to be made, and are integral structure.
The inner of socket part 2 has the spigot surface 22 of taper, and the outer surface of socket part 2 axially offers an air slot 23.When making up a prescription, air slot 23 can communicate gas in the medicine bottle 5 with ambient atmos, and spigot surface 22 then can make things convenient for socket part 2 together to insert in the medicine bottle 5 with needle section 1.Have the shoulder block 31 that protrudes laterally in the needle stand portion 3, offer one on the shoulder block 31 and cross gas passage 31a, this end of crossing gas passage 31a is communicated with described air slot 23, and the opening of the other end is positioned at the sidepiece of needle stand portion 3.
As shown in Figure 2, when making up a prescription, having this overall plastic pin will make up a prescription needle section 1 of syringe needle of the dispensing instrument of syringe needle of making up a prescription is inserted in the medicine bottle 5, socket part 2 on the needle section 1 also is inserted in the medicine bottle 5 with the plug 4 of needle section 1 penetration of vials 5, and the tapered guide surface 22 of 2 the inners, socket part can help socket part 2 to pierce through plug 4 smoothly to be inserted in the medicine bottle 5 well.Needle section 1 end extend in the medicinal liquid, and socket part 2 is positioned at the upper end of needle section 1, does not extend in the medicinal liquid.Air slot 23 parts on the socket part 2 are positioned at medicine bottle 5, and a part is positioned at outside the medicine bottle 5, so, just gas and ambient atmos in the medicine bottle 5 have been communicated with.
When injecting waters for injection or diluent in the past medicine bottle 5 of dispensing instrument, water for injection or diluent passed through liquid passage 11 and were injected in the medicine bottle 5, and the medicinal liquids in the medicine bottle 5 increase, and compress air in the medicine bottle 5.By air slot 23 gases at high pressure are discharged when producing malleation in the medicine bottle 5, up to bottle internal gas pressure and ambient pressure balance.When dispensing instrument extracts medicinal liquid in medicine bottle 5, produce negative pressure in the needle stand portion 3, gas is pressed into medicinal liquid the dispensing instrument from crossing liquid passage 11 in the medicine bottle 5, and medicine bottle 5 giving drugs into nose liquid measures reduce, and the pressure in the medicine bottle 5 reduces.When producing negative pressure in the medicine bottle 5, ambient atmos replenishes in the medicine bottle 5 by air slot 23, with balance medicine bottle 5 inner and outer air pressures.
Inserted when dark when needle section 1 and socket part 2, when just the air slot 23 of socket part 2 all was positioned at medicine bottle 5, the shoulder block 31 that plays position-limiting action leaned on plug 4.The opening of crossing the gas passage 31a other end that is communicated with air slot 23 on the shoulder block 31 is positioned on the lateral surface of needle stand portion 3 all the time, even if therefore the inner face and the plug 4 of shoulder block 31 lean, the opening of crossing gas passage 31a still has with the external world and communicates.By this opening with cross gas passage 31a with air slot 23 with extraneously be communicated with to get up.
As a kind of preferred version, can save socket part 2 as Fig. 4 institute, directly air slot 23 is opened in the outer surface of needle section 1.Certainly, it is thicker to offer the sidewall thickness of needle section 1 of air slot 23 this time.
Embodiment two
As shown in Figure 5 and Figure 6, similar among the structure of the syringe needle that makes up a prescription in the present embodiment and the embodiment one, difference is, the air guide channel that is communicated with medicine bottle 5 inside and outside gases is a vent cap 6, this vent cap 6 is axially disposed within 2 inside, socket part, and 2 surfaces, socket part offer passage 1 and the passage 2 62 that is communicated with this vent cap 6.When socket part 2 and needle stand portion 3 directly linked together, passage 2 62 just was equal to the opening of gas passage 31a at needle stand portion 3 sidepieces.In the present embodiment, the quantity of vent cap 6 is four, circumferentially uniform distribution.
As shown in Figure 7, when making up a prescription, to the make up a prescription needle section 1 of syringe needle of the dispensing instrument that has a syringe needle that originally makes up a prescription is inserted in the medicine bottle 5, socket part 2 on the needle section 1 also is inserted in the medicine bottle 5 with the plug 4 of needle section 1 penetration of vials 5, the tapered guide surface 22 of 2 the inners, socket part can help socket part 2 to pierce through plug 4 smoothly to be inserted in the medicine bottle 5 well, and socket part 2 outer walls are smooth, also can reduce the resistance when inserting.Needle section 1 end extend in the medicinal liquid, and socket part 2 is positioned at the upper end of needle section 1, does not extend in the medicinal liquid.The passage 1 of the vent cap 6 on the socket part 2 is positioned at medicine bottle 5, and the 31a of gas passage excessively of shoulder block 31 is communicated with vent cap 6, and the lateral surface that 2 62 of the passages of vent cap 6 are positioned at needle stand portion 3 is communicated with mistake gas passage 31a.
When injecting waters for injection or diluent in the past medicine bottle 5 of dispensing instrument, water for injection or diluent passed through liquid passage 11 and were injected in the medicine bottle 5, and the medicinal liquids in the medicine bottle 5 increase, and compress air in the medicine bottle 5.When producing malleation in the medicine bottle 5 successively by passage 1, vent cap 6, cross gas passage 31a and passage 2 62 is discharged gases at high pressure, up to bottle internal gas pressure and ambient pressure balance.When dispensing instrument extracts medicinal liquid in medicine bottle 5, produce negative pressure in the needle stand portion 3, gas is pressed into medicinal liquid the dispensing instrument from crossing liquid passage 11 in the medicine bottle 5, and bottle giving drugs into nose liquid measure reduces, and the pressure in the medicine bottle 5 reduces.When producing negative pressure in the medicine bottle 5, ambient atmos passes through passage 2 62, mistake gas passage 31a and vent cap 6 successively and replenishes in the medicine bottle 5, with balance medicine bottle 5 inner and outer air pressures.
Inserted when dark when needle section 1 and socket part 2, when just the vent cap 6 of socket part 2 all was positioned at medicine bottle 5, the shoulder block 31 that plays position-limiting action leaned on plug 4.Passage 2 62 in the needle stand portion 3 still is positioned at outside the medicine bottle 5, does not influence in the medicine bottle 5 and extraneous gas exchange.
Specific embodiment described herein only is that this utility model spirit is illustrated.This utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.