CN1861206A - Safety injector and its operating method - Google Patents
Safety injector and its operating method Download PDFInfo
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- CN1861206A CN1861206A CN 200510069456 CN200510069456A CN1861206A CN 1861206 A CN1861206 A CN 1861206A CN 200510069456 CN200510069456 CN 200510069456 CN 200510069456 A CN200510069456 A CN 200510069456A CN 1861206 A CN1861206 A CN 1861206A
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- syringe
- injection rod
- accommodation space
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Abstract
A high-safety injector is composed of tube body, holding part, metallic needle and injecting rod. Its operation method is also disclosed. Its advantages are simple structure, easy assembling and automatic withdraw of needle.
Description
Technical field
The invention relates to a kind of safety injector and operational approach thereof, particularly safety injector and the operational approach thereof that can withdraw automatically about a kind of syringe needle.
Background technology
In the process of medical treatment, the medicine injection is a kind of common medical act, but medical personnel are often stung by injection needle accidentally, cause being infected, so must be quite careful when handling syringe needle, prevent that medical personnel or offal treatment personnel from being stabbed by unclean syringe needle.
TaiWan, China M249673 patent case has disclosed a kind of retractable safety injector with flexible drag hook, it comprises syringe, syringe needle and injection rod, this injection rod is by cork, the push rod body reaches the drag hook assembly that connects this cork and this push rod body separably and forms, this drag hook assembly is formed with drag hook at this cork front end, draw the negative pressure that forms in the injection process and bestow the pulling force of this injection rod by the structure utilization of non-return trip, this drag hook assembly and this push rod body are moved a certain distance to the direction that is separated from each other, make this cork and this push rod body separate, and utilize injection process to bestow the thrust of this injection rod and the frictional force of cork and syringe inwall periphery, make this cork and this push rod body recover engagement state, thereby make part drag hook assembly protrude in this cork front end, when this cork touches inside to this syringe front end, make this drag hook assembly combine with syringe needle, with the past post-tensioning of this injection rod, can take in syringe needle in the accommodation space of syringe this moment again.
But, above-mentioned retractable safety injector with flexible drag hook provide a kind of can be with the safety injector of needle retractable in the syringe, avoid medical personnel in the process of using syringe, to be taken place, but this retractable safety injector member complexity, assembling with flexible drag hook is difficult for and syringe needle can't be retracted in the syringe automatically by the accident of pricking wound.
Therefore, how to make that a kind of member is simple, assembling easily and syringe needle can be retracted to safety injector in the syringe automatically, be mainly to deal with problems at present.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, main purpose of the present invention is to provide a kind of metal needle to be collapsible to the interior safety injector of syringe, it is provided with magnet assembly in injection rod, by this injection rod of withdrawing, make this magnet assembly attract this metal needle, make metal needle be retracted in the syringe, avoid causing the pollution of environment and medical personnel's infection.
Another object of the present invention is to provide a kind of metal needle can be retracted to the interior safety injector of syringe automatically, by magnet assembly and hook portion are set at injection rod, establish elastic component at syringe, make this elastic component produce elastic force, the magnet assembly of this injection attracts this metal needle, make metal needle be retracted to automatically in this syringe, increase medical personnel's safety.
A further object of the present invention is to provide a kind of simple structure and assembling to be easy to safety injector, medical personnel can not stab by contaminated syringe metal needle after having injected, the danger of the source of disease of avoiding infection reaches the practicality that increases syringe, safeguards healthcare givers's personal safety.
For reaching above-mentioned and other purpose, safety injector of the present invention comprises: syringe, have needle cylinder main body and syringe needle socket, this needle cylinder main body and syringe needle socket are ducted body, this ducted body comprises first accommodation space that is formed on needle cylinder main body successively and second and third accommodation space that is formed on this syringe needle socket, and the 3rd accommodation space is expanded laterally from second accommodation space; Holding parts places the hollow tubular body in this syringe needle socket, and this holding parts has first fixed part and second fixed part, and this first fixed part is expandable shape; Metal needle has the stop section, and this metal needle closely places in the hollow tubular body of this holding parts, and supports second fixed part that terminates in this holding parts by this stop section; And injection rod, place in this injection tube, and this injection rod end having magnet assembly, this injection rod of withdrawing makes the magnet assembly of this injection rod attract this metal needle, and metal needle is retracted in this syringe.
In addition, the rear end of this syringe stretches out and is formed with catch, is used on this catch elastic component being set, and is provided with a plurality of hook portions at the axial location of this injection rod, when injecting, hook this elastic component by this hook portion, and push this injection rod, make this elastic component produce elastic force, after discharging this injection rod, make this elastic component produce elastic-restoring force, make the magnet assembly of this injection rod attract this metal needle, it is retracted in this syringe automatically.
The operational approach of safety injector of the present invention may further comprise the steps: according to the dosage that will inject injection is contained in this syringe by this metal needle; Push this injection rod, an end that makes this injection rod have magnet assembly pushes this injection, carries out the injection of injection in the syringe; Make first fixed part of this holding parts enter the open-shaped attitude of the 3rd accommodation space, make this metal needle present loosening state; And the magnet assembly that makes this injection rod attracts this metal needle, and this injection rod of withdrawing, and this metal needle is received in this syringe.
In addition, to should injection rod be axially arranged with hook portion and this syringe when being provided with elastic component, can make the hook portion of this injection rod hook the elastic component of this syringe; Push this injection rod to inject, make this elastic component produce an elastic force, and make first fixed part of this holding parts enter the 3rd accommodation space and open-shaped attitude makes this metal needle present loosening state by second accommodation space to this injection rod; Make this elastic component be subjected to discharging and produce elastic-restoring force, this injection rod is flicked toward the direction that breaks away from this first accommodation space; Make the magnet assembly of this injection rod attract this metal needle also to move, thereby this metal needle is received to this syringe automatically to the direction of withdrawing.
In sum, safety injector of the present invention and operational approach thereof have solved member complexity in the prior art effectively, assembling is difficult for and syringe needle can't be retracted to problems such as syringe automatically, avoid causing the pollution of environment and medical personnel's infection, increase medical personnel's safety, really ensure that medical personnel are not stabbed by the metal needle of syringe, because this syringe has simple structure and assembling is easy, increase the practicality of syringe simultaneously, safeguard healthcare givers's personal safety.
Description of drawings
Fig. 1 is the exploded perspective view of safety injector of the present invention.
Fig. 2 is the combination stereogram of safety injector of the present invention.
Fig. 3 is the combination section of the safety injector of the embodiment of the invention 1.
Fig. 4 is the cutaway view that the safety injector of the embodiment of the invention 1 draws injection.
Fig. 5 A and Fig. 5 B are the cutaway views of the safety injector safe retraction metal needle of the embodiment of the invention 1.
Fig. 6 is the cutaway view of the safety injector of the embodiment of the invention 2.
Fig. 7 is the cutaway view of the safety injector of the embodiment of the invention 2 when drawing injection.
Fig. 8 is the cutaway view in safety injector when injection of the embodiment of the invention 2.
Fig. 9 A and Fig. 9 B are the cutaway views of the safety injector safe retraction metal needle of the embodiment of the invention 2.
The specific embodiment
Below by specific instantiation explanation embodiments of the present invention.
Embodiment 1
Fig. 1 is the exploded perspective view of safety injector of the present invention.Safety injector 1 of the present invention comprises: syringe 10, and this syringe 10 has needle cylinder main body 11 and syringe needle socket 12; Holding parts 20, this holding parts 20 have first fixed part 21 and second fixed part 22; Metal needle 30, this metal needle 30 has stop section 31; And injection rod 40, this injection rod 40 has cork 41, magnet assembly 42 and injection rod body 43.
Please refer to Fig. 1 and with reference to figure 2, Fig. 2 is the combination stereogram of safety injector of the present invention.A catch 13 is outwards respectively extended in the both sides, rear end of this syringe 10, these catch 13 substantially oblong-shaped bodies, and this needle cylinder main body 11 is a ducted body, and this ducted body forms first accommodation space 14, first accommodation space 14 of this needle cylinder main body 11 is used to place this injection rod 40.
This syringe needle socket 12 also is the ducted body that is communicated with this needle cylinder main body 11, the ducted body of this syringe needle socket 12 is to should needle cylinder main body 11, be formed with second accommodation space 15 and the 3rd accommodation space 16 successively, the 3rd accommodation space 16 is expanded laterally from second accommodation space 15, makes the internal diameter of the 3rd accommodation space 16 internal diameters greater than this second accommodation space 15.Second accommodation space 15 and the 3rd accommodation space 16 of this syringe needle socket 12 are used to place this holding parts 20, be provided with chamfered design 17 between this second accommodation space 15 and the 3rd accommodation space 16, this chamfered design 17 makes the 3rd accommodation space 16 to the second accommodation spaces 15 big, make in this syringe needle socket 12 and form shape wide at the top and narrow at the bottom, this chamfered design 17 is used to guide first fixed part 21 of this holding parts 20, makes this first fixed part 21 conveniently enter the 3rd accommodation space 16 in the syringe needle socket 12 of this syringe 10.
This holding parts 20 is a hollow tubular body, this hollow tubular body is used to place this metal needle 30, first fixed part 21 of this holding parts 20 is expandable shape in the naturalness that is not subjected to external force, and be provided with chamfered design 23 between this first fixed part 21 and second fixed part 22, the external diameter that makes first fixed part 21 of this holding parts is to stretch to extending out along this chamfered design 23 from this second fixed part 22, and then make the internal diameter of the external diameter of this first fixed part 21 greater than these syringe needle socket 12 second accommodation spaces 15, the external diameter of this second fixed part 22 is less than the internal diameter of these syringe needle socket 12 second accommodation spaces 15, during this holding parts 20 closely is contained in second accommodation space 15 in this syringe needle socket 12 by this first fixed part 21, and make this first fixed part 21 be subjected to the crowded closure state that presents of external force.The chamfered design 23 of this holding parts 20 is the chamfered design 17 that cooperate this second accommodation space 15 and the 3rd accommodation space 16, when being pushed, first fixed part 21 of this holding parts 20 more easily enters the 3rd accommodation space 16, the internal diameter of the 3rd accommodation space 16 is greater than the external diameter of this first fixed part 21, no longer is subjected to external force pressure when making this first fixed part 21 enter the 3rd accommodation space 16 and presents open configuration.The internal diameter of the little hollow tubular body greater than this holding parts 20 of the internal diameter of this metal needle 30 in addition, and this holding parts 20 and syringe 10 can adopt compliant plastic material, this metal needle 30 closely is contained in this holding parts 20 of (second accommodation spaces 15) in this syringe needle socket 12, avoids injection to penetrate in this holding parts 20 simultaneously or 12 of this holding parts 20 and syringe needle sockets.
Second fixed part, 22 bottoms of this holding parts 20 are provided with groove 24, and this groove 24 leans for the stop section 31 of these metal needles 30, make this metal needle 30 can be toward front slide.But these second fixed part, 22 dimplings extend in first accommodation space 14 in this needle cylinder main body 11, when follow-up the injection, make effectively this holding parts 20 of pushing of this injection rod 40, and this holding parts 20 is pushed ahead, this first fixed part is entered in the 3rd accommodation space 16 in the syringe socket 12, present open configuration.
The end of this injection rod 40 has cork 41, and is formed with accommodation space 45 in this cork 41, and this accommodation space 45 is used to place this magnet assembly 42, and this injection rod body 43 is shapes of cross axial rib, but non-as limit.The cork 41 of these injection rod 40 ends can be formed with dimpling portion 44, is interposed in the holding parts 20 in second accommodation space 15 of this syringe needle socket 12 with effective pushing.
This safety injector also comprises lid 50 in addition, and this lid 50 is attached on this syringe needle socket 12, is used to coat this metal needle 30.
This metal needle 30 also can be one-body molded with this stop section 31, or the one-body molded stop section 31 that stretches out of the tail end of this metal needle 30.The composition of this injection rod 40 also can utilize the casting mode to pour into the cork 41 of the material that is magnetic earlier, pours into the injection rod body 43 of plastic material again, can realize the injection rod 40 with magnet assembly of the present invention.
See also Fig. 3, it is the combination section of safety injector of the present invention.In the safety injector 1 of the present invention, this metal needle 30 is via the rear end of this holding parts 20, place in the hollow tubular body of this holding parts 20, withstand the groove 24 of this holding parts 20 in by the stop section 31 of this metal needle 30 this moment, this metal needle 30 can not placed in this holding parts 20 to front slide, this holding parts 20 places in second accommodation space 15 of this syringe needle socket 12, and the rear end that makes this holding parts 20 protrudes in this needle cylinder main body 11, this moment former first fixed part 21 of answering the holding parts 20 of open configuration, firmly place in this syringe needle socket 12 because of placing first fixed part 21 that makes holding parts 20 in second accommodation space 15 of this syringe needle socket 12 to combine closely, and this metal needle 30 also firmly placed in this holding parts 20 and can not slide this moment.This magnet assembly 42 places in this cork 41 and combines with this injection rod body 43, and this injection rod 40 after this combination places in this first accommodation space 14 via the rear end insertion of needle cylinder main body 11.
See also Fig. 4, it is the cutaway view that safety injector of the present invention draws injection.When safety injector 1 of the present invention extracts injection 60, at first with the direction withdrawing of this injection rod 40 to this first accommodation space 14 of disengaging, make in this syringe 10 and form negative pressure, injection 60 is sucked in this syringe 10, this moment, this holding parts 20 still placed in second accommodation space 15 of this syringe needle socket 12, and this metal needle 30 firmly places on this holding parts 20 by the clamping of this holding parts 20.When the syringe 10 that injection 60 will be housed is injected, by slowly pushing this injection rod 40, these injection 60 injections are finished, this injection rod 40 is shifted the bottom of this holding parts 20 just onto, this moment, this holding parts 20 can guarantee to be positioned at second accommodation space 15 of this syringe needle socket 12, and this metal needle 30 firmly places on this holding parts 20 by the clamping of this holding parts 20.
See also Fig. 5 A and Fig. 5 B, it is the cutaway view of the safe retraction metal needle of safety injector of the present invention.After injection is finished, stabbed by injection needle accidentally for fear of the injector, at first to apply the strength of pushing forward to this injection rod 40 that withstands these holding parts 20 bottoms, this holding parts 20 is by this holding parts 20 of protuberance 44 pushing tows of injection rod 40 at this moment, first fixed part 21 of this holding parts 20 is pushed through the 3rd bigger accommodation space 16 of space, make this first fixed part 21 be open state, this moment, this metal needle 30 presented loosening state because of opening of this first fixed part 21, relend by this injection rod 40 of withdrawing this moment, make the magnet assembly 42 of this injection rod 40 attract this metal needle 30 also to move to the direction of withdrawing, make this metal needle 30 be retracted in this syringe 10, reach the effect of safety injector.
In addition, if when injection, because of push injection bar 40 strength excessive, first fixed part 21 of this holding parts 20 is pushed through the 3rd bigger accommodation space 16 of space, when making this first fixed part 21 be open state, though this metal needle 30 can present loosening state because of opening of this first fixed part 21, but because of the bottom of this metal needle 30 is provided with stop section 31, so still can make metal needle 30 by this stop section, support effectively and end on second fixed part 22 of this holding parts 20, therefore when thing to be injected removes this safety injector, metal needle 30 can not take place be retained in problem on the thing to be injected, this metal needle 30 there is no to ending effect with respect to injection rod 40 withdrawing directions simultaneously, can attract this metal needle 30 because of the magnet assembly 42 of this injection rod 40, this metal needle 30 is moved to the withdrawing direction of injection rod 40 equally, and then be received in this syringe 10, reach the effect of safety injector.
The operational approach of safety injector may further comprise the steps:
According to the dosage that will inject injection 60 is contained in this syringe 10 by this metal needle 30; Push this injection rod 40, an end that makes this injection rod 40 have magnet assembly 42 pushes this injection 60, carries out the injection of injection 60 in the syringe 10; Make first fixed part 21 of this holding parts 20 enter the 3rd accommodation space 16 open-shaped attitudes, make this metal needle 30 present loosening state; And make the magnet assembly 42 of this injection rod 40 attract this metal needle 30, and this injection rod 42 of withdrawing, this metal needle 30 is received in this syringe 10.
Embodiment 2
Please refer to Fig. 6, it is the cutaway view of the safety injector of the embodiment of the invention 2.Wherein, represent with identical or proximate element numbers with the foregoing description 1 identical or proximate assembly, and being described in detail of existing together mutually in the elliptical structure.
Safety injector of the present invention comprises: syringe 10, and this syringe 10 has needle cylinder main body 11 and syringe needle socket 12, and the rear end of this syringe 10 is provided with elastic component 18; Holding parts 20, this holding parts 20 have first fixed part 21 and second fixed part 22; Metal needle 30, this metal needle 30 has stop section 31; And injection rod 40, this injection rod 40 has cork 41, magnet assembly 42 and injection rod body 43, and axially is provided with a plurality of hook portions 46 along this injection rod body 11.
A catch 13 is outwards respectively extended in the both sides, rear end of this syringe 10, and this catch 13 is provided with elastic component 18, this needle cylinder main body 11 is a ducted body, and this ducted body forms first accommodation space 14, and first accommodation space 14 of this needle cylinder main body 11 is used to place this injection rod 40.
This syringe needle socket 12 also is a ducted body, and ducted body is formed with second accommodation space 15 and the 3rd accommodation space 16, second accommodation space 15 and the 3rd accommodation space 16 of this syringe needle socket 12 are used to place this holding parts 20, be provided with chamfered design 17 between this second accommodation space 15 and the 3rd accommodation space 16, this chamfered design 17 makes the 3rd accommodation space 16 big than second accommodation space 15, makes in this syringe needle socket 12 and forms shape wide at the top and narrow at the bottom.
This holding parts 20 is a hollow tubular body, this hollow tubular body is used to place this metal needle 30, cooperate the chamfered design 17 of this second accommodation space 15 and the 3rd accommodation space 16 also to be provided with chamfered design 23 between this first fixed part 21 and second fixed part 22, make first fixed part 21 of this holding parts 20 enter the 3rd accommodation space 16 of this syringe needle socket 12 easily, first fixed part 21 of this holding parts 20 is expandable shapes under naturalness, the bottom of this second fixed part 22 is provided with groove 24, this groove 24 leans for the stop section 31 of these metal needles 30, makes this metal needle 30 can be toward front slide.The chamfered design 17 of above-mentioned in addition this syringe needle socket 12 is used to guide first fixed part of this holding parts 20 to insert in the 3rd accommodation space 16 of this syringe needle socket 12.One end of this metal needle 30 has a stop section 31, and this stop section 31 is connected to second fixed part 22 of holding parts.
The external diameter of this first fixed part 21 is greater than the internal diameter of these syringe needle socket 12 second accommodation spaces 15, the external diameter of this second fixed part 22 is less than the internal diameter of these syringe needle socket 12 second accommodation spaces 15, make during this holding parts 20 closely is contained in second accommodation space 15 in this syringe needle socket 12 by this first fixed part 21, and make this first fixed part 21 be subjected to the crowded closure state that presents of external force.The chamfered design 23 of this holding parts 20 is the chamfered design 17 that cooperate this second accommodation space 15 and the 3rd accommodation space 16 in addition, when being pushed, first fixed part 21 of this holding parts 20 more easily enters the 3rd accommodation space 16, the internal diameter of the 3rd accommodation space 16 no longer is subjected to external force pressure to present open configuration greater than the external diameter of this first fixed part 21 when making this first fixed part 21 enter the 3rd accommodation space 16.The internal diameter of the little hollow tubular body greater than this holding parts 20 of the internal diameter of this metal needle 30 in addition, and this holding parts 20 and syringe 10 can adopt compliant plastic material, this metal needle 30 closely is contained in this holding parts 20 of (second accommodation spaces 15) in this syringe needle socket 12, avoids injection to penetrate in this holding parts 20 simultaneously or 12 of this holding parts 20 and syringe needle sockets.
The front end of this injection rod 40 has cork 41, forms accommodation space 45 in this cork 41, and this accommodation space 45 is used to place this magnet assembly 42, and this injection rod body 43 is the shape of cross axial rib.The cork 41 of these injection rod 40 ends can form dimpling portion 44, is interposed in the holding parts 20 in second accommodation space 15 of this syringe needle socket 12 with effective pushing.
Moreover, one side of this injection rod 40 (cross axial rib) is provided with a plurality of hook portions 46, the distribution of these a plurality of hook portions 46 is the different injected dose according to when injection, be provided with a plurality of hook portions 46 at different interval length place respectively, for example according to scale 5cc, 10cc, 15cc, 20cc or the like of this syringe stack shell, being positioned at this cross axial rib hook portion 46 foremost is the hook portions 46 that cooperate the injected dose design of 5cc, the hook portion 46 of this cross axial rib arrangement second is the hook portion 46 that cooperates the injected dose design of 10cc, the rest may be inferred, and this hook portion 46 is used to hook this elastic component 18.The design of this hook portion 46 is to present barb inclination angle state, makes this injection rod 40 extract injection when this syringe aperture position moves, and can not hook this elastic component 18 and hinders the action of this injection rod 40; Relative to injecting when this syringe opening opposite location moves at this injection rod 40, can make this injection rod 40 hook elastic component 18 by this hook portion 46, when injection is finished, utilize the elastic-restoring force of this elastic component 18 to shrink back automatically.
Please continue to consult Fig. 6 and cooperate with reference to figure 7, this Fig. 7 is the cutaway view of the safety injector of the embodiment of the invention 2 when drawing injection.When the safety injector 1 of present embodiment extracts injection 60, at first with the direction withdrawing of this injection rod 40 to this first accommodation space 14 of disengaging, make in this syringe 10 and form negative pressure, injection 60 is sucked in this syringe 10, this moment, this holding parts 20 still placed in second accommodation space 15 of this syringe needle socket 12, and this metal needle 30 firmly places on this holding parts 20 by the clamping of this holding parts 20.
See also Fig. 8, it is the cutaway view in safety injector when injection of the embodiment of the invention 2.When the syringe 10 that injection 60 is housed is injected, adjust the angle of this injection rod 40, the side and this catch 13 that make this injection rod 40 have hook portion 46 form the friendship of hanging down, and select the position of this hook portion 46 according to the injected dose of want injection, make the hook portion 46 of this injection rod 40 of selection hook the elastic component 18 of this catch 13, this moment is when if the scale that 46 pairs of the hook portions of this injection rod 40 should the syringe stack shell is provided with, promptly this hook portion 46 can be over against hooking this elastic component 18, then pushing this injection rod 40 again injects fully up to this injection 60 and finishes, this moment, this elastic component 18 produced an elastic force because of being subjected to pushing, and this injection rod 40 is shifted the bottom of this holding parts 20 just onto, finish action of injection, this moment, this holding parts 20 still placed in second accommodation space 15 of this syringe needle socket 12, and this metal needle 30 firmly places on this holding parts 20 by the clamping of this holding parts 20.
See also Fig. 9 A and Fig. 9 B, it is the cutaway view of safe retraction metal needle of the safety injector of the embodiment of the invention 2.After the injector finishes injection, at first this injection rod 40 that withstands these holding parts 20 bottoms is just applied the power of pushing forward, this holding parts 20 is by this holding parts 20 of protuberance 44 pushing tows of injection rod 40 at this moment, or because of these holding parts 20 dimplings to syringe inside, first fixed part 21 of this holding parts 20 is pushed through the 3rd bigger accommodation space 16 of space, make this first fixed part 21 no longer be subjected to external force bundle system to be open state, this moment, this metal needle 30 presented loosening state because of this first fixed part 21 opens, this moment, the injector can decontrol the finger of this injection rod 40 of pushing, make this elastic component 18 be subjected to discharging and produce elastic-restoring force, this injection rod 40 is flicked toward the direction that breaks away from this first accommodation space 14, the magnet assembly 42 of this injection rod 40 attracts this metal needle 30 to move to the direction of withdrawing simultaneously, this metal needle 30 is received in this syringe 10, automatically metal needle 30 is retracted in the syringe 10.
Claims (10)
1. a safety injector is characterized in that, this syringe comprises:
Syringe, have needle cylinder main body and syringe needle socket, this needle cylinder main body and syringe needle socket are ducted body, this ducted body comprises first accommodation space that is formed on needle cylinder main body successively and second and third accommodation space that is formed on this syringe needle socket, and the 3rd accommodation space is expanded laterally from second accommodation space;
Holding parts places the hollow tubular body in this syringe needle socket, and this holding parts has first fixed part and second fixed part, and this first fixed part is expandable shape;
Metal needle has the stop section, and this metal needle closely places in the hollow tubular body of this holding parts, and supports second fixed part that terminates in this holding parts by this stop section; And
Injection rod places in this injection tube, and this injection rod end has magnet assembly, and this injection rod of withdrawing makes the magnet assembly of this injection rod attract this metal needle, and metal needle is retracted in this syringe.
2. safety injector as claimed in claim 1 is characterized in that, the rear end of this syringe stretches out and is formed with catch.
3. safety injector as claimed in claim 1, it is characterized in that, be provided with chamfered design between this second accommodation space and the 3rd accommodation space, the 3rd accommodation space is expanded outwardly from this second accommodation space, between this first fixed part and second fixed part chamfered design is arranged also, make first fixed part of this holding parts be easy to enter the 3rd accommodation space of this syringe needle socket and open-shaped attitude.
4. safety injector as claimed in claim 1, it is characterized in that, second fixed part of this holding parts is that dimpling extend in the first interior accommodation space of this needle cylinder main body, this injection rod end has protuberance, when pushing this holding parts for this injection rod, make first fixed part of this holding parts be easy to enter in the 3rd interior accommodation space of syringe socket, and present open configuration.
5. safety injector as claimed in claim 1 is characterized in that, this syringe also comprises:
Elastic component is arranged on the first accommodation space opening part of syringe; And
A plurality of hook portions, axially be provided with along this injection rod, hook this elastic component by this hook portion, and push this injection rod, make this elastic component produce an elastic force, and discharge this injection rod, make this elastic component produce elastic-restoring force, make the magnet assembly of this injection rod attract this metal needle simultaneously, metal needle is retracted in this syringe automatically.
6. safety injector as claimed in claim 5, it is characterized in that, the distribution of these a plurality of hook portions is to arrange according to the dose calibration of injection, and the design of this hook portion is barb inclination angle state, make this injection rod when this syringe aperture position moves, can not hook this elastic component and hinder the action of this injection rod, relative at this injection rod when this syringe opening opposite location moves, can make this injection rod hook elastic component by this hook portion.
7. safety injector as claimed in claim 1, it is characterized in that, the internal diameter of this metal needle is greater than the internal diameter of the hollow tubular body of this holding parts, and the external diameter of first fixed part of this holding parts is stretched to extending out along chamfered design from this second fixed part, and then make the internal diameter of the external diameter of this first fixed part greater than this syringe needle socket second accommodation space, the external diameter of this second fixed part is less than the internal diameter of this syringe needle socket second accommodation space, make this holding parts borrow this first fixed part closely to be contained in second accommodation space of this syringe needle socket, and make this first fixed part be subjected to the crowded closure state that presents of external force, and this holding parts and syringe can adopt compliant plastic material, this metal needle are clamped in be contained in this holding parts in second accommodation space of this syringe needle socket.
8. the operational approach of a safety injector as claimed in claim 1 is characterized in that, this method may further comprise the steps:
According to the dosage that will inject injection is contained in this syringe by this metal needle;
Push this injection rod, an end that makes this injection rod have magnet assembly pushes this injection, carries out the injection of injection in the syringe;
Make first fixed part of this holding parts enter the open-shaped attitude of the 3rd accommodation space, make this metal needle present loosening state; And
Make the magnet assembly of this injection rod attract this metal needle, and this injection rod of withdrawing, this metal needle is received in this syringe.
9. operational approach as claimed in claim 8, it is characterized in that, this safety injector also comprises elastic component and a plurality of hook portion that axially is provided with along this injection rod of the first accommodation space opening part that is arranged on syringe, hook this elastic component by this hook portion, when this injection rod of pushing, make this elastic component produce an elastic force, and discharge this injection rod, make this elastic component produce elastic-restoring force, make the magnet assembly of this injection rod attract this metal needle simultaneously, metal needle is retracted in this syringe automatically.
10. operational approach as claimed in claim 9, it is characterized in that, the distribution of these a plurality of hook portions be according to when injection injected dose scale arrange, and the design of this hook portion presents barb inclination angle state, make this injection rod when this syringe aperture position moves, can not hook this elastic component and hinder the action of this injection rod, relative at this injection rod when this syringe opening opposite location moves, can make this injection rod hook elastic component by this hook portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100694564A CN100411698C (en) | 2005-05-09 | 2005-05-09 | Safety injector and its operating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100694564A CN100411698C (en) | 2005-05-09 | 2005-05-09 | Safety injector and its operating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1861206A true CN1861206A (en) | 2006-11-15 |
| CN100411698C CN100411698C (en) | 2008-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100694564A Expired - Fee Related CN100411698C (en) | 2005-05-09 | 2005-05-09 | Safety injector and its operating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100411698C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963046A (en) * | 2016-06-06 | 2016-09-28 | 济宁医学院 | Trace drug administration device special for medical detection of behavior of laboratory rodent in waking state |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1238143B (en) * | 1990-01-09 | 1993-07-09 | SYRINGE FOR HYPODERMIC INJECTIONS EQUIPPED WITH A PISTON SUITABLE FOR WITHDRAWING AND CONTAINING THE HYPODERMIC NEEDLE AFTER ITS USE | |
| GB2342047A (en) * | 1998-09-25 | 2000-04-05 | Charles Mcnairn | Single use syringe |
-
2005
- 2005-05-09 CN CNB2005100694564A patent/CN100411698C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963046A (en) * | 2016-06-06 | 2016-09-28 | 济宁医学院 | Trace drug administration device special for medical detection of behavior of laboratory rodent in waking state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100411698C (en) | 2008-08-20 |
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