CN101732785A

CN101732785A - Safety injector

Info

Publication number: CN101732785A
Application number: CN200810180454A
Authority: CN
Inventors: 方振熠
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2010-06-16

Abstract

The invention discloses a safety injector which comprises an injection barrel, a push rod, a needle stand, a needle head and a needle head cover, wherein the injection barrel is provided with a medicine storage space, the push rod is arranged in the medicine storage space in a penetrating way, and the needle stand is connected to the front end of the injection barrel; a jointing space is arranged at the bottom of the needle stand and sequentially provided with a first large-diameter, a third necking part and a second inner-diameter part which are in a preset shape; a pushing part which is in a hollow circular protrusion shape is arranged at the top end of the push rod, when the push rod is pushed forwards, the first large-diameter part of the needle stand guides the pushing part to enter into the second inner-diameter part, the outer diameter of the pushing part is extruded into the second inner-diameter part and is blocked at the third necking part as the pushing part is compressed to deform and become small, and the needle stand and the need head are both pulled back and accommodated in the medicine storage space when the push rod is pulled to return. The invention provides the safety injector structure which is simple in action and precise in safety operation and reclaiming effect.

Description

A kind of safety injector

Technical field

The present invention relates to a kind of syringe needle later that can use and reclaim the safety injector of inserting in injection tube, it is remaining to provide minimum medicinal liquid by structure special between its push rod and needle stand when combining, making has more correct dosage can be injected in the health of user, provides that an action is simple, the safety injector of accurate safe operation and recovering effect.

Background technology

Along with the progress of science and technology and the lifting of medical skill, human importance for medical safety has more further understanding, no matter be more careful in use for the use of medical apparatus therefore also, or the processing procedure after use is all quite paid attention to; And at present; use for injection device focuses on the problem that prevention repeatability is used and syringe needle is accidentally injured; except used injection device is destroyed it can't be provided the use once more; in its destructive process, more need protection operator's security protection structure; there is the possible situation of being wounded by stabbing to produce when placing safe location, therefore the appearance of safety syringe-drum is arranged to avoid the Needle removing of medical personnel after will using to reclaim.

Summary of the invention

For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that a kind of safety injector, for the sheathed needle stand of a syringe needle, wherein the top of this push rod is provided with a pertusate pushing part at this injection tube front end to include push rod, the device that an injection tube, is set in this injection tube; And the rear end of this needle stand is provided with a winding space, this pushing part can be advanced in this winding space, because of this pushing part can utilize perforation when the pressurized, dwindle its outer circle footpath, can provide therefore that an action is simple, the safety injector structure of accurate safe operation and recovering effect.

Description of drawings

Fig. 1 is the perspective exploded view of a preferred embodiment of the present invention;

Figure 1A is another sketch map of pushing part embodiment illustrated in fig. 1;

Fig. 2 is a cross-sectional schematic for plane combination embodiment illustrated in fig. 1;

Fig. 3 is that this push rod forward impelling arrives the planar gesture sketch map in the winding space of this needle stand;

Fig. 4 retracts this push rod and related this needle stand, syringe needle are down drawn in the floor map in this injection tube in the lump;

Fig. 5 fractures behind the cervical region of this push rod needle stand and syringe needle are retained in floor map in the injection tube.

Description of reference numerals:

Injection tube 11 needle stands perforation 111

Grip flaps 112 drug storage spaces 113

Stop section 114 push rods 12

Pushing part 121 perforation 1211

Center pillar position 122 retaining edge portions 123

Cervical region 124 ribs 125

Push jack 126 needle stands 13

Sleeve through part 131 flanges 132

Location division 133 passages 134

Winding space 135 first large-diameter portions 1351

Second inside diameter 1352 the 3rd necking part 1353

The concave ring groove 136 leakproof collars 137

Syringe needle 14 needle covers 15

Ring set 19 ring protuberances 191,192

Concave ring groove 193

The specific embodiment

See also Fig. 1 and shown in Figure 2, the invention provides a kind of safety injector, it includes the needle cover 15 that an injection tube 11, a push rod 12, a needle stand 13, a syringe needle 14 and a cover are placed on these syringe needle 14 outsides; Wherein

This injection tube 11 is mainly a columnar object, the front end center is provided with the needle stand perforation 111 of a tool than the roundlet footpath, the bottom, rear end then is provided with a grip flaps 112 that can supply the staff thumb to grasp, this injection tube 11 inner drug storage spaces 113 that form are formed with one with this 111 of needle stand perforation and dwindle circle stop section 114 directly in that the front end in this drug storage space 113 is inner;

The top of this push rod 12 is provided with the predetermined circle footpath of a tool (less than drug storage space 113 internal diameters of this injection tube 11), and the pushing part 121 that is the prominent shape of hollow circle, and on the surface of pushing part 121, be provided with the perforation 1211 of a connection hollow inside, the bore of this perforation 1211 is the flaring shape in end face one side of pushing part 121, then be gradually-reducing shape at different opposite side, extend outside below this pushing part 121 and establish a center pillar position 122, then be coated with a ring set 19 at these 122 places, center pillar position, and being shaped as of this ring set 19 has the drug storage space 113 internal diameters big circlet protuberance 191 of two circle footpaths corresponding to this injection tube 11,192, and the boundary in these two the ring protuberance between 191, a concave ring groove 193 of 192, with a retaining edge portion 123 set below this center pillar portion 122, can provide airtight drug storage space 113 to prevent the effect that medicament exosmoses, and have between concave ring groove 193 and two ring protuberance 191,192 ring set 19 designs make this push rod 12 have again and are easy to be pushed, retract mobile effect; This retaining edge portion 123 and connecing below this retaining edge portion 123 establishes one section cervical region 124 that dwindles the circle footpath, it is the effect that its position of cervical region more than 124 can be retained in for injection finishes back twisting push rod 12 in the injection tube 11, below this cervical region 124, be equipped with some microscler ribs 125, be provided with for the staff thumb at the end of these ribs 125 and push firmly a push jack 126 designs, then the pusher structure with general is similar, non-principal character of the present invention does not repeat them here.And this pushing part 121 of push rod 12 of the present invention with connect the form that is connected that this center pillar position 122 that is located at its below is the predetermined angular that tilts, its purpose and purposes are then at the back detailed description;

This needle stand 13 is to establish one with its front end to dwindle circle sleeve through part 131 directly, at the appropriate location of this sleeve through part 131 and be equipped with a flange 132, have and prevent that this needle stand 13 can be toward the effect of withdrawal in the needle stand perforation 111 of injection tube 11 when injecting, its sleeve through part 131 passes outside the needle stand perforation 111 of this injection tube 11, support in location, 114 places, stop section of this injection tube 11 and below its sleeve through part 131, have a location division 133, these sleeve through part 131 centers are equipped with a passage 134, place for this syringe needle 14, be provided with a winding space 135 in the rear end of this passage 134, below the outside in this winding space 135, be provided with a concave ring groove 136 for a leakproof collar 137 is set, with with this sleeve through part 131 on flange 132 and this ring set 19 on this push rod 12 and retaining edge portion 123, providing fully, airtight this drug storage space 113 can prevent the effect that medicament leaks out outward, and with this drug storage space 113, winding space 135, the path that passage 134 and syringe needle 14 are communicated, pushed forward by this push rod 12 as the medicinal liquid that in the drug storage space 113 of this injection tube 11, is installed in, and enter intravital path by injection behind these syringe needle 14 insertion human bodies; And the open end in this winding space 135 is established one first large-diameter portion 1351, its circle footpath is the external diameter greater than the pushing part 121 of this push rod 12, then toward interior deep, and one second inside diameter 1352 that this passage 134 is communicated with, it is the external diameter size corresponding to the pushing part 121 of this push rod 12, the internal diameter that then is provided with the 3rd necking part 1353, the three necking parts 1353 in tool smallest circle footpath between this first large-diameter portion 1351 and this second inside diameter 1352 then is corresponding to the circle footpath size of these push rod 12 its pushing parts 121 with 122 junctions, center pillar position.

A kind of safety injector according to the present invention as described hereinbefore, user extracts medicinal liquid and packs in the injection tube 11 and syringe needle 14 inserted human bodies and the actions of injecting are same as the prior art, and see also shown in Figure 3, when action of injection draws to an end, when medicament is left some, the pushing part 121 that its push rod 12 is had is because of being to be the prominent shape structure of hollow circle, when push rod 12 is continued to promote to advance, this pushing part 121 that is the predetermined angular that tilts at first will touch this first large-diameter portion 1351 of these needle stand 13 its winding space 135 bottom open end, and will be by the guiding of this first large-diameter portion 1351, make the caliber size of pushing part 121 limits perforation, take advantage of a situation and pulled direct join and more in depth continue toward its second inside diameter 1352 to advance, though the circle footpath of this second inside diameter 1352 is less, but because this pushing part 121 is a perforation structure, pressurized diminishes in good time, and got into this second inside diameter 1352 just when inner, again because of these pushing part 121 elastic restoring forces that had own, be subject to the shape in this winding space 135 conversely when making its desire return original state again and be fastened on its 3rd necking part 1353, as shown in Figure 3, then this push rod 12 is tight with this needle stand winding, and can with in the drug storage space 113 remaining all medicaments inject fully and finish, do not have in the prior art and borrow to collude pawl because between push rod and needle stand be, structures such as caulking groove are colludes the form of holding winding mutually, cause closely winding between push rod and the needle stand, collude pawl and there is suitable medicament to residue in this, in the shared drug storage space of structures such as caulking groove, can't be pushed and flow to syringe needle 14 places and inject human body, therefore cause injection not exclusively, dosage is incorrect and defective that may influence therapeutic effect produces;

After injection finishes, when drawing back this push rod 12, because this needle stand 13 is quite tight with the connecting structure of this push rod 12, to relatedly in the lump draw in this needle stand 13 in the drug storage space 113 of this injection tube 11 with syringe needle 14 at this push rod 12 when pulling back, and because this pushing part 121 itself promptly is the state of the predetermined angular that tilts with this center pillar position 122, in case enter in this drug storage space 113, promptly also enter in the lump because of this needle stand 13, do not bore a hole 111 o'clock at the needle stand of this injection tube 11 and there is its sleeve through part 131 to stretch through, stretching by force makes pushing part 121 be the active force of stretching shape, so also being with syringe needle 14, this needle stand 13 is in the drug storage space 113 skewedly, can't be more successfully by fight back and pass this needle stand perforation 111 and be used again, as shown in Figure 4; When the cervical region 124 for the treatment of this push rod 12 retreats to the tail end in this drug storage space 113, a left side, right this push rod 12 of twisting fractures its cervical region 124, then as shown in Figure 5, can be with the used syringe needle 14 of injection, comprise needle stand 13, and preceding half section of push rod 12 is retained in the injection tube 11 together, among the process, medical personnel do not have the chance that touches syringe needle 14 again, be unlikely the possible situation of being wounded by stabbing so can guarantee medical personnel when being captured in safe location carrying out Needle removing returned, last will hold again to receive have the injection tube 11 that used syringe needle 14 to lose in the syringe retracting device to regain destruction, reach the present invention and guarantee the safety of syringe use and the intended purposes of health.

Claims

1. safety injector, comprise: one have the drug storage space be set in for the injection tube that holds medicament, the push rod that is used for pushing medicament in the drug storage space of described injection tube, a device at described injection tube front end for the sheathed needle stand of a syringe needle, and one upper shield at the needle cover of described needle stand and syringe needle outside, it is characterized in that:

The top of described push rod is provided with a tool reservation shape and circle footpath, is the pushing part of the prominent shape of hollow circle, the below of described pushing part is provided with a center pillar position, the center pillar position be coated with a ring set with center pillar portion below a retaining edge portion, the effect that can prevent that medicament from exosmosing is provided, the below of this retaining edge portion connects establishes one section cervical region that dwindles its circle footpath, and the body of rod with some ribs is set under this cervical region;

The set sleeve through part that dwindles the circle footpath of the front end of this needle stand stretches out in outside the needle stand perforation of this injection tube, wear a passage places for syringe needle at the center of this sleeve through part, and be provided with a winding space in the rear end of this passage, the spatial open end of this winding is established one first large-diameter portion, its circle footpath is greater than the external diameter of the pushing part of this push rod, one has the position that then is positioned at this winding space and channel connection than second inside diameter in roundlet footpath, one the 3rd necking part is connected in this first large-diameter portion and this second inside diameter, be advanced in this winding space by guiding this pushing part to take advantage of a situation with this first large-diameter portion, again because of this pushing part can suffer oppression elongate dwindle its outer circle footpath after, get into its second inside diameter, and when returning original state again, desire is stuck close in the 3rd necking part by the elastic restoring force that this pushing part itself is had, enter human body so can all push medicament to this syringe needle with injection, can be related this needle stand and syringe needle be retracted appearance in the lump and be received in the drug storage space of injection tube when drawing when receiving this push rod, again push rod is fractureed from its cervical region toward rollback.

2. safety injector according to claim 1 is characterized in that, the pushing part of this push rod with connect the form that is connected that this center pillar position that is located at its below is the predetermined angular that tilts.

3. safety injector according to claim 1, it is characterized in that, this ring set that this push rod is worn outside the post position therein has two the ring protuberances of two circle footpaths corresponding to the drug storage space internal diameter size of this injection tube, and the concave ring grooves of boundary between these two ring protuberances.

4. safety injector according to claim 1 is characterized in that, this needle stand is provided with a concave ring groove in its outside, winding space, for a sheathed leakproof collar.(seeing description page 4 the 6th row)

5. safety injector according to claim 1 is characterized in that, this needle stand also is provided with a flange at the outside appropriate location of its sleeve through part, has to prevent that this needle stand can be toward the effect of withdrawal in the needle stand perforation of injection tube when injecting.

6. safety injector according to claim 1 is characterized in that, this needle stand has a location division below its sleeve through part, supports needle stand perforation and location, the formed stop section of drug storage interior volume at this injection tube.

7. safety injector according to claim 1 is characterized in that, on the surface of this pushing part, is provided with the perforation of a connection hollow inside.

8. safety injector according to claim 7 is characterized in that, the bore of this perforation is a flaring shape in pushing part one side, then is a gradually-reducing shape at the pushing part opposite side.