CN101898002A - Retraction structure of safety syringe - Google Patents
Retraction structure of safety syringe Download PDFInfo
- Publication number
- CN101898002A CN101898002A CN2009101453525A CN200910145352A CN101898002A CN 101898002 A CN101898002 A CN 101898002A CN 2009101453525 A CN2009101453525 A CN 2009101453525A CN 200910145352 A CN200910145352 A CN 200910145352A CN 101898002 A CN101898002 A CN 101898002A
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- China
- Prior art keywords
- needle stand
- needle
- push rod
- cylindrical shell
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5066—Means for preventing re-use by disconnection of piston and piston-rod
- A61M2005/5073—Means for preventing re-use by disconnection of piston and piston-rod by breaking or rupturing the connection parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a retraction structure of a safety syringe, in particular to an innovative design which is used for safely retracting a syringe needle into a cylinder body. The retraction structure mainly comprises the cylinder body, an upper needle seat, a lower needle seat, a push rod, a rotation limit unit, an L-shaped locking unit and a quick guide braking unit; therefore, the retraction structure leads a rotating seat of the push rod to be rapidly aligned and meshed with a rotating groove relatively to the needle seats by the L-shaped locking unit and the quick guide braking unit, so that the user can conveniently circularly rotate the push rod and lead the needle seat to be aligned in the next step, and open retraction mode of the syringe needle can be available; furthermore, as the quick guide braking unit is closely meshed and contacted, the residual liquid medicine is greatly reduced, the safety and environmental protection quality of the retraction structure of the safety syringe can be improved, and the syringe needle is convenient for retraction use and has progressive practicability.
Description
Technical field
The present invention relates to a kind of safety injector, especially a kind of entry needle that can bounce back safely is in the intravital retraction structure of tube.
Background technology
Syringe major part in the market is all traditional type, comprises that entry needle all is not have any safety device, not only can reuse, and cause medicine and blood contamination easily, add the exposed of entry needle, more cause stabbing of medical personnel and cleanup crew, deepen the popular of infectious disease.At the existing problem points of above-mentioned known syringe construction, how to develop and a kind ofly avoid reusing and cause the syringe of secondary pollution, use the ardent hope of institute of consumer in fact, also be that relevant dealer must make great efforts target and the direction that research and development break through.
In view of this, the ZL2008201079735 injection needle restoring formula safety injector of the previous application of the applicant, its characteristic mainly is that the outer rim precalculated position that is a needle stand offers L shaped groove, wherein this L shaped groove is generally to be divided into translot section and pod section, and the L shaped geosynclinal convex of the corresponding needle stand of inner barrel is provided with fixedly salient point, and fixedly salient point just cooperates the slide guide group to go into the translot section and the pod section of L shaped groove; Only, this kind conventional construction kenel finds still to exist following problem points in actual use experience: this known safety injector inside mainly is that single needle seat form collocation cylindrical shell and push rod are formed, yet when being applied in the needle changeable entry needle, be everlasting and extract when changing more tiny entry needle behind the medicinal liquid, dismantle radial force and the axial force that entry needle produced because of changing in the entry needle process by the rotation of syringe front end, and make this needle stand be destroyed with the adaptation of cylindrical shell and engaging property.
Summary of the invention
At the deficiencies in the prior art part, the invention provides a kind of retraction structure of safety injector, it can effectively improve needle stand and the adaptation of cylindrical shell and engaging property.
For achieving the above object, technical solution of the present invention is:
A kind of retraction structure of safety injector, it comprises a cylindrical shell, last needle stand, following needle stand and push rod; Wherein this inner barrel room one end is formed with opening, and should go up needle stand is to slide to be limited in the opening of cylindrical shell, this time needle stand is that the closed loop group is in last needle stand, this push rod is that predetermined segment is provided with the place of fractureing and an end is provided with clamping end, before when pushing away this clamping end be airtightly to be embedded in down needle stand or to go up the needle stand location, make needle stand, play between needle stand and push rod three to be axial interlock state each other; Arbitrary relative position between this cylindrical shell and the last needle stand is provided with limit switch unit, and wherein this limit switch unit is to comprise limited swivel base and block face, and is embedded in limit swivel base block in the limit rotor of block face; Arbitrary relative position between following needle stand and the cylindrical shell is provided with L shaped lock catch unit, and this L shaped lock catch unit is patent part and the limiting section that includes L groove shape, and slide guide is in the guide block of aforementioned patent part and limiting section; Relative position between push rod and the following needle stand is provided with quick guiding brake unit, it includes rotating seat and swivelling chute, aforementioned the two include three groups of above just relatively closely staggered engagements at least revolve pawl and Ka Gou, and each end end of respectively revolving pawl and Ka Gou is respectively equipped with the guiding incline that is easy to mesh para-position.
The usefulness of technique scheme is:
It is existing when being applied in the needle changeable entry needle to the present invention is directed to known injection needle restoring formula safety injector, be everlasting and extract when changing more tiny entry needle behind the medicinal liquid, dismantle radial force and the axial force that entry needle produced because of changing in the entry needle process by the rotation of syringe front end, improved breakthrough and make this needle stand be destroyed problem points with the adaptation of cylindrical shell and engaging property.By L shaped lock catch unit and quick guiding brake unit, and the quick para-position of rotating seat energy that can make push rod is engaged in the swivelling chute of relative needle stand, be user-friendly for next step ring switch and needle stand para-position, to be open retraction entry needle pattern, and by the tight engagement contact of push rod with the quick guiding brake unit of relative needle stand, and it is residual significantly to reduce medicinal liquid, and then make the present invention can reach the lifting of safety, environment-friendly quality, and facility and the practical improvement of entry needle on retraction uses.
Description of drawings
Fig. 1 is the exploded perspective view of safety injector of the present invention;
Fig. 2 is the decomposition generalized section of safety injector of the present invention;
Fig. 3 moves sketch map one for the present invention, and it shows this push rod state towards the needle stand pushing tow in cylindrical shell;
Fig. 4 moves sketch map two for the present invention, and it shows that the chimeric needle stand of this push rod is in the state of inner barrel;
Fig. 5 moves sketch map three for the present invention, and it shows not turn state of this push rod;
Fig. 6 moves sketch map four for the present invention, and it shows state after this push rod turn;
Fig. 7 moves sketch map five for the present invention, and it shows the state that fractures behind this push rod retraction;
Fig. 8 is the generalized section of second embodiment of the invention;
Fig. 9 is the three-dimensional exploded view of third embodiment of the invention;
Figure 10 is the three-dimensional exploded view of fourth embodiment of the invention;
Figure 11 is the decomposition generalized section of fourth embodiment of the invention;
Figure 12 is the entry needle of fourth embodiment of the invention and the view sub-anatomy of last needle stand;
Figure 13 is the action sketch map one of fourth embodiment of the invention, and it shows this push rod state towards the needle stand pushing tow in cylindrical shell;
Figure 14 is the action sketch map two of fourth embodiment of the invention, and it shows that the chimeric needle stand of this push rod is in the state of inner barrel;
Figure 15 is the action sketch map three of fourth embodiment of the invention, and it shows the state after this push rod turn;
Figure 16 is the action sketch map four of fourth embodiment of the invention, and it shows the state that fractures after this push rod bounces back;
Figure 17 is the combination generalized section of fifth embodiment of the invention.
The specific embodiment
The present invention now is described in conjunction with the accompanying drawings and embodiments.
The primary clustering symbol description is as follows:
Cylindrical shell (10), room (11), opening (12), last needle stand (20), entry needle (21), connection terminal (22), O shape ring (23), clamping groove (24), following needle stand (30), tank (31), group-connecting groove (32), through hole (33, retaining edge (34), only unload ring (35), push rod (40), place (41) fractures, plug (42), transfer end (43), Extendible flake (44), clamping end (45), oblique cone edge (451), ring shoulder (452), limit switch unit (50), limit swivel base (51), block face (511), limit rotor (52), L shaped lock catch unit (60), patent part (61), limiting section (62), guide block (63), rotating seat (70), revolve pawl (71), Ka Gou (72), guiding incline (73), swivelling chute (75), revolve pawl (76), Ka Gou (77), guiding incline (78), block (80), cylindrical shell (10A), room (11A), opening (12A), last needle stand (20A), entry needle (21A), connection terminal (22A), O shape ring (23A), stretch hole (24A), linking part (26A), following needle stand (30A), tank (31A), restriction retaining edge (32A), open port (33A), winding edge (34A), only unload ring (35A), check valve block (36A), push rod (40A), place (41A) fractures, plug (42A), transfer end (43A), Extendible flake (44A), clamping end (45A), extension (46A), rotating seat (70A), revolve pawl (71A), Ka Gou (72A), guiding incline (73A), swivelling chute (75A), revolve pawl (76A), Ka Gou (77A), guiding incline (78A).
The retraction structure that sees also the safety injector shown in Fig. 1～7 comprises a cylindrical shell (10), goes up needle stand (20), needle stand (30) and push rod (40) down, and is to be glutinous pin type entry needle (21) kenel in this entry needle of present embodiment (21).Wherein:
One cylindrical shell (10) internal capacity room (11) front end is formed with opening (12).
Needle stand on one (20) is the opening (12) that is limited in cylindrical shell (10), and should go up glutinous entry needle (21) and the cap (80) of being provided with of needle stand (20) front end, the end is provided with the connection terminal (22) of convex ring edge form, and inside, connection terminal (22) is formed with clamping groove (24), inner tool one perforation of this clamping groove (24) is communicated in entry needle (21), and these connection terminal (22) one sides are arranged with O shape ring (23).
Be provided with the tank (31) of closed loop group once in the needle stand (30) in the O shape ring (23) of last needle stand (20), tank (31) neighboring terminal is communicated with a group-connecting groove (32), this group-connecting groove (32) is closely to encircle the connection terminal (22) that embedding is sleeved on needle stand (20), the commentaries on classics of needle stand (20) ring can airtightly relatively be close in order needle stand (30) down, can not make medicinal liquid residue in group-connecting groove (32), and the adjacent side of this group-connecting groove (32) is provided with the retaining edge (34) in the through hole (33) and through hole (33) outside, the outer rim of this time needle stand (30) is arranged with and only unloads ring (35) again, with airtight slide guide in cylindrical shell (10).
The outer ring edge predetermined section of one push rod (40) is arranged with plug (42), in order to airtight slide guide in cylindrical shell (10), and the body of rod of this push rod (40) partly is cylinder hollow form (or ribbed) again, push rod (40) is turned in the journey at ring can not produce torsional deflection, and can reach certain rotation condition, and this push rod (40) rear end face is established the transfer end (43) of the more large stretch of volume morphing of tool, and transfer end (43) adjacent lateral deviation and move the Extendible flake (44) that disposes with the sheet volume morphing, can increase the hand-held area that tunes by the two lateral margin faces of transferring end (43) and Extendible flake (44), be beneficial to user and conveniently tune this push rod (40) rotation, this push rod (40) is provided with through hole (33) position male that should play needle stand (30) clamping end that wears (45) is provided again, wherein clamping end (45) outer ring surface has oblique cone edge (451), when push rod (40) when advancing forward, the scalene cone that utilizes clamping end (45) packing smoothly imports the through hole (33) of needle stand (30) down, and other end of this clamping end (45) is formed with ring shoulder (452), after clamping end (45) enters through hole (33), get further to make and encircle the retaining edge (34) of shoulder (452) block, and then reach push rod (40) in following needle stand (30), be axial interlock state each other between following needle stand (30) and last needle stand (20) three.
And the present invention is characterized in:
This cylindrical shell (10) and the relative position of going up between the needle stand (20) are provided with limit switch unit (50), and this limit switch unit (50) is to include Contraband shape limit swivel base (51) and just can be inserted in the interior limit rotor (52) of limit swivel base (51), wherein this limit swivel base (51) is the outer ring edge wall that ring-type is laid in needle stand (20) in present embodiment, this limit swivel base (51) is provided with enclosed card block face (511) in rear end, moreover this limit rotor (52) is that the opening (12) that ring-type is laid in cylindrical shell (10) is located the internal ring wall, respectively limit swivel base (51) towards the opening (12) of cylindrical shell (10) when advancing when last needle stand (20), each limit swivel base (51) just one by one insert group respectively limit rotor (52) in cylindrical shell (10), needle stand in the order (20) is ring with cylindrical shell (10) changes interlock, and goes up the axial limiting between needle stand (20) and cylindrical shell (10).
Then the relative position of this time needle stand (30) and cylindrical shell (10) is provided with L shaped lock catch unit (60), and this L shaped lock catch unit (60) is to include the patent part (61) of y direction in the L groove and the limiting section (62) of transverse diameter direction, but and just slide guide in the convex guide block (63) of aforementioned patent part (61) and limiting section (62); Wherein longitudinal axis patent part (61) in this L groove shape and transverse diameter limiting section (62) are the outer shroud wall precalculated positions that the groove shape is laid in down needle stand (30), sliding relatively the group in the guide block (63) of aforementioned patent part (61) and limiting section (62) then is to be convexly set in cylindrical shell (10) inwall to play needle stand (30) position relatively, whereby, make guide block (63) enter via the opening slide guide of vertical patent part (61) of playing needle stand (30), after guide block (63) cunning is pushed into base, patent part (61), further revolve the position again and be pushed into the lowest limit towards limiting section (62) direction, make this guide block (63) together with the limiting section (62) of this cylindrical shell (10) axial restraint in following needle stand (30), that is this time needle stand (30) reaches the purpose of axial limiting in cylindrical shell (10), and then makes down needle stand (30) and last needle stand (20) be able to the opening (12) that firm limit locks in cylindrical shell (10) to locate.When needle stand (30) is towards the rotation of the patent part (61) of L shaped lock catch unit (60) instantly, the inner guide block (63) of this cylindrical shell (10) then can encircle changes para-position to the patent part (61) of needle stand (30) down, make the entry needle (21) of needle stand (20) must be together with following needle stand (30) in cylindrical shell (10) opening (12) retraction displacement to cylindrical shell (10) inside.
Relative position is provided with quick guiding brake unit between push rod (40) and the following needle stand (30), and the guiding brake unit is to include rotating seat (70) and the swivelling chute (75) that is easy to the para-position engagement fast, wherein this swivelling chute (75) is the terminus inner of being located at down needle stand (30) in present embodiment, and this rotating seat (70) is located at push rod (40) to relative position that should swivelling chute (75), aforementioned include at least between the two four groups just relatively closely staggered engagement revolve pawl (76,71) and Ka Gou (77,72), and respectively four revolve pawl (76,71) and four Ka Gou (77,72) each end end is respectively equipped with the guiding incline (78.73) that is easy to mesh para-position, in order to its relative position of engagement of quick guiding and make the two ring and change interlock, and by the rotating seat (70) of this push rod (40) tight engagement with the swivelling chute (75) of following needle stand (30), can eliminate the two between crack and then to reduce medicinal liquid residual, so that the inside medicinal liquid of this cylindrical shell (10) can almost reach injection fully during preceding the pushing away of push rod (40), when injection was finished soon, push rod (40) rotating seat (70) was sliding automatically along importing the swivelling chute (75) of needle stand (30) down; In addition fast the rotating seat (70) of guiding brake unit and swivelling chute (75) in present embodiment be for can be just, contrary two-way ring changes the form that is engaged and linked, its main composition mode is that this revolves pawl (76,71), Ka Gou (77,72) and the symmetric each other pattern of guiding incline (78,73) are the continuous annular laying.
By above-mentioned structure, composition design, see also Fig. 3～7 with regard to use start situation of the present invention now and be described as follows:
When user when using this syringe, should go up needle stand (20) is the opening (12) that is limited in cylindrical shell (10) in advance, and this time needle stand (30) is to fasten by L shaped lock catch unit (60) to be limited in the interior also block of cylindrical shell (10) in last needle stand (20) rear end, when push rod (40) is the injection propelling, the oblique cone edge (451) of the clamping end (45) of this push rod (40) is by the through hole that is forced into down needle stand (30) (33), after treating that clamping end (45) enters this through hole (33), this clamping end (45) is that the comprehensive engagement clamping groove (24) that is sleeved on needle stand (20) is residual to reduce medicinal liquid, and it is the retaining edge (34) that block is limited in down needle stand (30) that this clamping end (45) enters its ring shoulder (452) of through hole (33) back, needle stand (30) constitutes axial interlock state so that push rod (40) reaches down, and simultaneously when the rotating seat (70) of push rod (40) desires to be engaged in down the swivelling chute (75) of needle stand (30), if the correct para-position of the Ka Gou (77) that revolves pawl (71) and swivelling chute (75) of this rotating seat (70), by the guiding incline that revolves pawl (71) (73) of rotating seat (70) and the quick each other inclined-plane guidance function of the guiding incline that revolves pawl (76) (78) of swivelling chute (75), and make the two revolve pawl (76,71) can revolve the Ka Gou (77 that the position is directed in the staggered engagement of institute's desire automatically, 72) position, be beneficial to go when user does not cost the para-position engagement, and the rotating seat (70) of this push rod (40) is the swivelling chute (75) of tight engagement in following needle stand (30), and the connection terminal (22) that should go up needle stand (20) is closely to encircle the group-connecting groove (32) that is embedded in down needle stand (30), the clamping end (45) of this push rod (40) is in the clamping groove (24) that closely is placed in needle stand (20) again, makes outside push rod (40) can be injected in medicinal liquid fully.
See also shown in Fig. 5～6, when injection back desire retraction entry needle (21) enters in the cylindrical shell (10), need manually to tune earlier push rod (40), make hand be gripped on the transfer end (43) and Extendible flake (44) rotation of push rod (40) rear end, each scalene cone cant by rotating seat (70) and swivelling chute (75), and the rotating seat (70) that makes push rod (40) fast para-position and tight engagement in the swivelling chute (75) of needle stand (30) down, the plural number of this rotating seat (70) revolves the staggered plural Ka Gou (77) that is engaged in swivelling chute (75) that embeds of pawl (71) when the two tight engagement, and the plural Ka Gou (72) of each rotating seat (70) be inlay card be engaged in each swivelling chute (75) revolve pawl (76), aforementioned the two plural number revolves pawl (76,71) end end and Ka Gou (77,72) the formed guiding incline (78 between, 73) also fit tightly contact relatively, it is residual to reduce medicinal liquid, this push rod (40) can be rotated and needle stand (30) ring commentaries on classics under the synchronous interlock by external force, through the external force ring change the back and the guide block (63) that makes cylindrical shell (10) by originally to limiting section (62) conversion that is positioned at needle stand (30) down patent part (61) to needle stand (30) under being positioned at, and the user push rod (40) that can be again contracts after further, ring shoulder (452) block of clamping end (45) that makes push rod (40) is in the following retaining edge (34) of needle stand (30), and down group-connecting groove (32) ring of needle stand (30) is embedded in to condense behind connection terminal (22) interlock of needle stand (20) and moves, treat to contract behind the place of fractureing (41) of push rod (40) be exposed to cylindrical shell (10) outer after, the application of force this place (41) (shown in the 7th figure) that fractures that fractures again, after making that push rod (40) is disconnected and being cut into two-stage nitration, and then reach needle stand (30) down and go up needle stand (20) entry needle of establishing (21) that sticks and keep somewhere security purpose in cylindrical shell (10).
This push rod (40) and following needle stand (30) are when doing the engagement para-position in addition, easily because of guiding the guiding incline (78 of brake unit fast, 73) order needle stand (30) ring commentaries on classics down, because of the relative position that should go up needle stand (20) and cylindrical shell (10) is provided with limit switch unit (50), relending by the connection terminal (22) of last needle stand (20) and the group-connecting groove (32) of following needle stand (30) is to belong to ring-type inlay card configuration, so that this time needle stand (30) only can rotate work relative to going up needle stand (20) generation ring, in order to prevent that user is when advancing this push rod (40) injection near the lowest limit, the rotating seat (70) of this push rod (40) can be by the guidance function of guiding incline (73), make the rotating seat (70) of push rod (40) rotate the swivelling chute (75) that is engaged in down needle stand (30), instantly needle stand (30) is via para-position and rotation, also as easy as rolling off a log needle stand (20) and the entry needle (21) of affecting of this time needle stand (30) rotates, and then entry needle (21) takes place easily inject the accident of rotating in human body, so design by the limit switch unit (50) between last needle stand (20) and cylindrical shell (10), and effective head it off.
Whereby, the present invention is by L shaped lock catch unit (60) and quick guiding brake unit, and the quick para-position of rotating seat (70) energy that can make push rod (40) is engaged in the swivelling chute (75) of relative needle stand, be user-friendly for next step ring switch (40) and needle stand para-position, to be open retraction entry needle (21) pattern, and by the tight engagement contact of push rod (40) with the quick guiding brake unit of relative needle stand, and it is residual significantly to reduce medicinal liquid, and then make the present invention can reach safety, the lifting of environment-friendly quality, and facility and the practical improvement of entry needle (21) on retraction uses.Supplementary notes is in addition, the limit swivel base (51) of this limit switch unit (50) also can be laid in opening (12) the inwall ring edge position of cylindrical shell (10), and this limit rotor (52) also can be laid in needle stand (20) outer wall ring edge and with respect to limit swivel base (51) position of cylindrical shell (10).
See also shown in Figure 8, it is the second embodiment of the present invention, L groove limiting section (62) and patent part (61) of the L shaped lock catch unit (60) that is oppositely arranged between following needle stand (30) that wherein should glutinous needle injector and cylindrical shell (10), also can be laid in opening (12) inwall of cylindrical shell (10), and the open slot end that makes patent part (61) is to being positioned at cylindrical shell (10) end, and this guide block (63) also can be laid in down the outside wall surface of needle stand (30), user can enter the base, patent part (61) of L shaped lock catch unit (60) by the guide block (63) of following needle stand (30), rotate to the lowest limit towards limiting section (62) direction again and be axial block state, and can reach needle stand (30) and the purpose of last needle stand (20) synchronizing shaft down to the opening that is limited in cylindrical shell (10) (12).
See also shown in Figure 9, it is the third embodiment of the present invention, the wherein rotating seat (70A) of set quick guiding brake unit and swivelling chute (75A) form between this push rod (40) and the following needle stand (30), only can be forward or reverse unidirectional ring quotes and leads the engagement para-position, described rotating seat (70A) and swivelling chute (75A) forward or reverse unidirectional ring are each other quoted the mode of leading the engagement para-position, what can be this rotating seat (70A) and swivelling chute (75A) respectively revolves pawl (76A, 71A), Ka Gou (77A, 72A) and guiding incline (78A 73A) lays for asymmetrical pattern is continuous annular.
See also shown in Figure 10～16, it is the 4th embodiment that the present invention also can be interchangeable needle injection kenel, wherein should go up needle stand (20A) front end inner edge wall is provided with in order to make up the linking part (26A) of needle changeable entry needle (21A), and be provided with the microscler hole (24A) of stretching of tubulose form in the linking part (26A), wherein this linking part (26A) inner edge is formed with the female thread section, connecting end (211A) for needle changeable entry needle (21A) is screwed in the linking part (26A) of needle stand on this (20A), and this microscler hole (24A) outer ring surface of stretching also can make up for the packing of needle changeable entry needle (21A), and this time needle stand (30A) this is stretched inner edge position, hole (24A) and cuts open and be provided with the elastic check valve block of inclination tool (36A) relatively, needle stand (20A) end then is provided with restriction retaining edge (32A) on this check valve block (36A) correspondence, end then is provided with open port (33A) in addition, and the outer rim that should go up needle stand (30A) end under the relative inlay card combination of needle stand (20A) then is provided with connection terminal (22A), following needle stand (30A) the inner edge inlay card position location of this connection terminal (22A) relatively then is provided with winding edge (34A), wherein should go up the outer O shape ring (23A) that is arranged with in connection terminal (22A) of needle stand (20A), and should go up needle stand (20A) the outer wall ring relative cylindrical shell of edge face (10A) inwall ring edge face and be provided with limit switch unit (50), wherein the limit swivel base (51) of this limit switch unit (50) is the outer wall ring edge that is laid in needle stand (20A), and the limit swivel base of needle stand (20A) is then laid limited rotor (52) on opening (12A) the inwall ring edge correspondence of this cylindrical shell (10A), the needle changeable entry needle of present embodiment mainly is by limit switch unit (50) the L shaped lock catch unit (60) of arranging in pairs or groups, can effectively prevent to cause the damage of syringe because of user of service's improper operation, as: engaging property and sealing destruction etc., and needle changeable entry needle (21) is after the extraction medicinal liquid is in cylindrical shell (10A), must change more tiny entry needle (21) injection human body, when limit switch unit (50) can prevent to change dismounting entry needle (21) because of rotation, what produced radially reached axial force and makes the sealing of syringe and engaging power be destroyed.
Hold above-mentioned, but this time needle stand (30A) is gone up needle stand (20A) relatively is provided with the tank (31A) of closed loop group in O shape ring (23A), the adjacent side of tank (31A) is communicated with swivelling chute (75), and be provided with L shaped lock catch unit (60) in the relative cylindrical shell of this time needle stand (30A) outside wall surface (10A), wherein the L shaped groove patent part (61) of this L shaped lock catch unit (60) and limiting section (62) are the outer ring edge walls that is laid in down needle stand (30A), and guide block (63) is to be laid in cylindrical shell (10A) the interior ring edge wall position of this L shaped lock catch unit (60) relatively, corresponding needle stand (30A) end down of this push rod (40A) is provided with rotating seat (70) in regular turn in addition, extension (46A) and ring shoulder (45A), when push rod (40A) propelling is organized into when playing needle stand (30A) and going up needle stand (20A), its rotating seat (70) is to close the swivelling chute (75) that is engaged in down needle stand (30A), and the extension (46A) of this push rod (40A) is to be set in the stretching in the hole (24A) of needle stand (20A), this ring shoulder (45A) has the open port (33A) that the oblique cone edge can pass through the elastic check valve block of tool (36A) smoothly again, and block is limited in the restriction retaining edge (34A) of end in addition, make its ring shoulder (45A) block in the restriction retaining edge (32A) of stretching outer end, hole (24A) after making extension (46A) enter smoothly stretching hole (24A), and the guiding brake unit is a relative position of being located at push rod (40A) end and following needle stand (30A) fast, wherein the guiding brake unit is to include the rotating seat (70) of being located at push rod (40A) front end fast, and the swivelling chute (75) of being located at down needle stand (30A), aforementioned the two be include four groups just relatively closely staggered engagement revolve pawl (76,71) and Ka Gou (77,72), and respectively four revolve pawl (76,71) and four Ka Gou (77,72) each end end is respectively equipped with the guiding incline (78 that is easy to mesh para-position, 73), in order to its relative position of engagement of quick guiding and make the two ring and change interlock, and by the tight engagement of rotating seat (70) with the swivelling chute (75) of following needle stand (30A) of this push rod (40A); In addition fast the rotating seat (70) of guiding brake unit and swivelling chute (75) in present embodiment be for can be just, contrary two-way ring changes engagement to configuration state, its main composition mode is that this revolves pawl (76,71), Ka Gou (77,72) and the symmetric each other pattern of guiding incline (78,73) are the continuous annular laying.
See also shown in Figure 17, it is the fifth embodiment of the present invention, wherein L groove limiting section (62) and patent part (61) of the L shaped lock catch unit (60) that is oppositely arranged between the following needle stand (30A) of this needle changeable syringe and cylindrical shell (10A), also can be laid in opening (12A) inwall of cylindrical shell (10A), and the open slot end that makes patent part (61) is to being positioned at cylindrical shell (10A) end, and this guide block (63) also can be laid in down the outside wall surface of needle stand (30A), user can enter the base, patent part (61) of L shaped lock catch unit (60) by the guide block (63) of following needle stand (30A), rotate to the lowest limit towards limiting section (62) direction again and be axial block state, and can reach needle stand (30A) and the purpose of last needle stand (20A) synchronizing shaft down to the opening that is limited in cylindrical shell (10A) (12A).
Claims (9)
1. the retraction structure of a safety injector, it comprises a cylindrical shell, goes up needle stand, needle stand and push rod down; Wherein this inner barrel room one end is formed with opening, and should go up needle stand is to slide to be limited in the opening of cylindrical shell, this time needle stand is that the closed loop group is in last needle stand, this push rod is that predetermined segment is provided with the place of fractureing and an end is provided with clamping end, before when pushing away this clamping end be airtightly to be embedded in down needle stand or to go up the needle stand location, make needle stand, play between needle stand and push rod three to be axial interlock state each other; It is characterized in that: the arbitrary relative position between this cylindrical shell and the last needle stand is provided with limit switch unit, and wherein this limit switch unit is to comprise limited swivel base and block face, and is embedded in limit swivel base block in the limit rotor of block face; Arbitrary relative position between following needle stand and the cylindrical shell is provided with L shaped lock catch unit, and this L shaped lock catch unit is patent part and the limiting section that includes L groove shape, and slide guide is in the guide block of aforementioned patent part and limiting section; Relative position between push rod and the following needle stand is provided with quick guiding brake unit, it includes rotating seat and swivelling chute, aforementioned the two include three groups of above just relatively closely staggered engagements at least revolve pawl and Ka Gou, and each end end of respectively revolving pawl and Ka Gou is respectively equipped with the guiding incline that is easy to mesh para-position.
2. the retraction structure of a kind of safety injector as claimed in claim 1 is characterized in that: wherein this limit switch unit, L shaped lock catch unit and fast the syndeton of guiding brake unit can be used in glutinous pin type entry needle structure.
3. the retraction structure of a kind of safety injector as claimed in claim 1 is characterized in that: wherein this limit switch unit, L shaped lock catch unit and fast the syndeton of guiding brake unit can be used in needle changeable entry needle structure.
4. the retraction structure of a kind of safety injector as claimed in claim 1, it is characterized in that: wherein this limit switch unit room inwall of can be cylindrical shell is provided with the limit rotor near open end, and the outside wall surface that should go up needle stand provides limit swivel base spacing and that restriction is rotated relative to limitting rotor then to be provided with.
5. the retraction structure of a kind of safety injector as claimed in claim 1, it is characterized in that: wherein this limit switch unit can be cylinder inboard wall and is provided with the limit swivel base near open end, should go up the needle stand outside wall surface and provide limit rotor spacing and that restriction is rotated relative to limitting swivel base then to be provided with.
6. the retraction structure of safety injector as claimed in claim 1, it is characterized in that: wherein play needle stand outside wall surface precalculated position to can be patent part and the limiting section that is provided with L groove shape, and this cylinder inboard wall patent part that should L groove shape and limiting section are provided with can be for slide guide in interior guide block.
7. the retraction structure of a kind of safety injector as claimed in claim 1, it is characterized in that: wherein play needle stand outside wall surface precalculated position can be and be provided with guide block, and this cylinder inboard wall can be to be provided with to the guide block that should play needle stand and provides slide guide in interior L groove shape patent part and limiting section.
8. the retraction structure of a kind of safety injector as claimed in claim 1 is characterized in that: wherein the rotating seat of guiding brake unit and swivelling chute are each other just fast, contrary two-way ring changes and be engaged and linked.
9. the retraction structure of a kind of safety injector as claimed in claim 1 is characterized in that: wherein fast the rotating seat of guiding brake unit and swivelling chute only forward or only reverse unidirectional ring are quoted and are led the engagement para-position each other.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101453525A CN101898002B (en) | 2009-05-26 | 2009-05-26 | Retraction structure of safety syringe |
| PCT/CN2009/075580 WO2010135895A1 (en) | 2009-05-26 | 2009-12-15 | Retracting structure of a safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101453525A CN101898002B (en) | 2009-05-26 | 2009-05-26 | Retraction structure of safety syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101898002A true CN101898002A (en) | 2010-12-01 |
| CN101898002B CN101898002B (en) | 2012-06-13 |
Family
ID=43222126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101453525A Expired - Fee Related CN101898002B (en) | 2009-05-26 | 2009-05-26 | Retraction structure of safety syringe |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101898002B (en) |
| WO (1) | WO2010135895A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102652849A (en) * | 2011-03-02 | 2012-09-05 | 张淑茗 | Needle base assembly rotating and retracting structure of safety injector |
| CN102836485A (en) * | 2012-09-28 | 2012-12-26 | 徐雪花 | Self-destructive injector |
| WO2016058278A1 (en) * | 2014-10-14 | 2016-04-21 | 洪志华 | Rotary safety syringe |
| WO2018076133A1 (en) * | 2016-10-24 | 2018-05-03 | 洪志华 | Rotary safety syringe |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5106379A (en) * | 1991-04-09 | 1992-04-21 | Leap E Jack | Syringe shielding assembly |
| EP1593404A1 (en) * | 2004-05-05 | 2005-11-09 | Chang-Tzu Chen | Syringe protective structure |
| CN2719326Y (en) * | 2004-06-17 | 2005-08-24 | 罗瑞钟 | Human body safety syringe |
| CN1911464A (en) * | 2005-08-12 | 2007-02-14 | 吴渭水 | Safety injector capable of recovering needle |
| CN2863143Y (en) * | 2005-12-07 | 2007-01-31 | 林作钱 | Safe self-destruction syringe |
| CN2920268Y (en) * | 2006-05-19 | 2007-07-11 | 林秀枝 | Simple type safety injector |
| CN201213945Y (en) * | 2008-03-28 | 2009-04-01 | 张淑茗 | Needle retraction type safety injector |
| CN201168290Y (en) * | 2008-03-28 | 2008-12-24 | 张淑茗 | Safety syringe with retractable injection needle |
-
2009
- 2009-05-26 CN CN2009101453525A patent/CN101898002B/en not_active Expired - Fee Related
- 2009-12-15 WO PCT/CN2009/075580 patent/WO2010135895A1/en active Application Filing
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102652849A (en) * | 2011-03-02 | 2012-09-05 | 张淑茗 | Needle base assembly rotating and retracting structure of safety injector |
| WO2012116596A1 (en) * | 2011-03-02 | 2012-09-07 | Chang Shu-Ming | Autorotating retraction structure of needle seat components of safe syringe |
| CN102652849B (en) * | 2011-03-02 | 2013-12-25 | 张淑茗 | Needle base assembly rotating and retracting structure of safety injector |
| EP2682144A1 (en) * | 2011-03-02 | 2014-01-08 | Shu-Ming Chang | Autorotating retraction structure of needle seat components of safe syringe |
| EP2682144A4 (en) * | 2011-03-02 | 2015-03-18 | Shu-Ming Chang | Autorotating retraction structure of needle seat components of safe syringe |
| CN102836485A (en) * | 2012-09-28 | 2012-12-26 | 徐雪花 | Self-destructive injector |
| WO2016058278A1 (en) * | 2014-10-14 | 2016-04-21 | 洪志华 | Rotary safety syringe |
| WO2018076133A1 (en) * | 2016-10-24 | 2018-05-03 | 洪志华 | Rotary safety syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101898002B (en) | 2012-06-13 |
| WO2010135895A1 (en) | 2010-12-02 |
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Granted publication date: 20120613 Termination date: 20190526 |