CN2453936Y - Self-destroyed syringe capable of changing needle - Google Patents

Abstract

The utility model relates to a self-destroying type syringe capable of changing needle heads, which belongs to medical appliances. The utility model comprises an elliptic needle cylinder, a needle bar, a needle bar hook, a hook containing cavity, and a needle holder, wherein, one end of the needle bar is provided with a handle, the other end of the needle bar is provided with a piston, and the handle is connected with the piston through a bar body; the center of the bottom of the needle cylinder is provided with an assembling hole which is used for installing the needle holder, and the needle holder is assembled on the needle cylinder through a needle holder piston at the inner bottom of the needle cylinder; the bar body is provided with an easy-broken-off and easy-destroying structure; the needle cylinder and a needle cap are in an integral forming and are provided with a disposable destroying device. The syringe has the advantages of reliable connection, convenient use for medical staff, and fast and simple operation, and can effectively control the circulation of disease sources which are brought by a used syringe with an exposed needle head.

Description

A kind of self-destructive syringe of replaceable syringe needle

This utility model relates to medical apparatus and instruments, is a kind of self-destruction novel injector of replaceable syringe needle.

Conventional injector, great majority are made up of syringe, shank and entry needle.Syringe is a cylindrical shape, and pin is sleeved on the overhanging needle adapter of syringe bottom separably.Shank one end has piston, is used for the injection in the tube is passed through tube head, pin, is expelled in the human body; The other end of shank has handle, and there is the outer hand rest of opening the syringe end in addition, when injection by handle and hand rest with the injecting liquid drug in the syringe in human body.There is following defective in use in this syringe: 1, because curative activity is a rigorous job of preventing and curing diseases, and prophylactic propagation, especially Bing Du immediate contagion can not be ignored.But in the society often some undesirable reclaim or collect exhausted disposable syringe for the personal interests of oneself, sell through packing again because existing syringe itself does not have mandatory breaking-up device, the lawless person is had an opportunity to take advantage of.2, existing syringe is owing to use its pin of back to be positioned on the injector syringe, and syringe needle is exposed to be made the not guilty third party come to harm easily and infect.Particularly medical personnel and post processing personnel.

This utility model is a kind ofly can be in use just can carry out destructive one by one to its parts and handle, prevent to be utilized and can to make needle retractable to be shielded once more effectively and prevent that source of disease from spreading, easy to use and reliable novel injector according to what the existing existing defective of syringe provided.

Syringe of the present utility model is realized in the following manner: this syringe includes oval syringe, shank, shank hook, hook cavity volume, needle stand; One end of shank has handle, and handle has symmetrical flap, and the other end has piston.Handle is connected with piston by the body of rod; The syringe bottom center has the pilot hole that is used to install needle stand, and needle stand is assemblied on the syringe by the needle stand piston of syringe inner bottom part, has frangibility and destructible structure on the above-mentioned body of rod.

Described body of rod cross section is " ten " font structure, the perforate of the frangibility structure on the body of rod on four faces of body of rod middle part " ten " font structure or the snap slot that has at the suitable position of the body of rod.Destructible device on the body of rod is offered weak ring and is realized on the oval piston seat.For making things convenient for the destructible device to come into force, the junction at shank and shank piston seat is provided with breach; This breach is connected with the interior circle of annular destructible device.

Syringe of the present utility model is compared with existing syringe has following significant advantage: 1, this syringe uses the back only to need the medical worker that the shank hook is inserted the hook cavity volume, needle stand can be withdrawn in the syringe together with pin after shank rotated to an angle, in this simultaneously, by the rotation of shank, the weakness ring of shank piston seat is destroyed; The self-destruction clamp of shank hook enters in the corresponding duck eye on hook cavity volume surface, reaches the purpose of structure self-destruction.It is simple to operate fast and can control the source of disease that the syringe after the use brings because of syringe needle is exposed effectively and spread.2, has weak destructible structure between pin medicated cap and the syringe; before using its destruction can be carried out normal injection operation; like this syringe being carried out the destructiveness protection handles; easy folded structure on the body of rod and destructible structure in addition; recycle to stop the lawless person, guarantee that curative activity normally carries out.

Below in conjunction with accompanying drawing to technical scheme further instruction of the present invention:

Fig. 1 is an overall structure sketch map of the present utility model;

Fig. 2 is the structural representation of syringe and pin medicated cap, and wherein Fig. 2 a is a front view, Fig. 2 b be B-B to view, Fig. 2 c is that A-A is to view.

Fig. 3 is the structural representation of shank, and wherein Fig. 3 a is a front view, and Fig. 3 b is a left view, and Fig. 3 c, 3d are cutaway view, and Fig. 3 e is a right view.

Fig. 4 is the structural representation of shank hook, and wherein Fig. 4 a is a front view, and Fig. 4 b is a left view, and Fig. 4 c is a vertical view.

Fig. 5 is a shank piston structure sketch map, and wherein Fig. 5 a is a front view, and Fig. 5 b is a vertical view, and Fig. 5 c is a upward view.

Fig. 6 is a needle stand piston structure sketch map, and wherein Fig. 6 a is a front view, and Fig. 6 b is a left view, and Fig. 6 c is a right view.

Fig. 7 is the structural representation of hook cavity volume, and wherein Fig. 7 a is a front view, and Fig. 7 b is a left view, and Fig. 7 c is a right view, and Fig. 7 d is that A-A is to view.

Fig. 8 is the needle stand structural representation, and wherein Fig. 8 a is a front view, and Fig. 8 b is a left view, and Fig. 8 c is a vertical view.

Referring to Fig. 1, syringe of the present utility model includes syringe (1), shank (2), shank hook (8), hook cavity volume (6), needle stand (7); One end of shank (2) has handle (21), and handle has symmetrical flap (29), and the other end has shank piston (3), and handle (21) is connected with shank piston (3) by the body of rod (22); The bottom center of syringe (1) has the pilot hole (13) that is used to install needle stand (7), and needle stand (7) is positioned on the syringe (1) by needle stand piston (4).Pin medicated cap (16) is one-body molded with syringe (1), and weak destructible device (17) is arranged, and uses preceding with its destruction, to reach disposable application target.Have frangibility and destructible structure on the above-mentioned body of rod (22), this easy folded structure is the perforate at body of rod middle part and the groove easy to break that body of rod suitable position has, so that syringe fractures after using up, reaches the purpose of destructive protection.

Referring to Fig. 3 a, Fig. 3 c and Fig. 3 d, the cross section of the above-mentioned body of rod is " ten " font structure again, on this body of rod on four faces of the perforate of frangibility structural formula (23) " ten " font structure in the middle part of the body of rod (22); According to circumstances also can adopt other frangibility structure, the breach or the like that fractures that the suitable position that is the body of rod as its frangibility structure has.

Above-mentioned said perforate (23) is a slot, and perforated area is the 30%-80% of body of rod cross-sectional area.

Referring to Fig. 3 b, the destructible device on the piston seat of the above-mentioned body of rod (25) is offered weak ring (26) and is realized on the oval piston seat again.Breach on the shank (20), be exactly on four faces of shank (22) " ten " font with the junction of piston seat (25), be provided with vee (20); This breach (20) is connected with the interior circle of annular destructible device (26).This breach (20) can be arbitrary shape, as rectangle.

Referring to Fig. 3 a, Fig. 3 b, the small column on the above-mentioned body of rod (27) is used for giving and shank piston (3) and shank (2) position relation again

Referring to Fig. 2 a, Fig. 2 b and Fig. 2 c, above-mentioned syringe (1) is an ellipticity, and its end has the outer hand rest of opening (11).Syringe (1) inwall front end has the annular protrusion (14) that increases needle stand piston (4) tightness.Pin medicated cap (16) is one-body molded with syringe (1), is provided with weak destructible device (17).

Referring to Fig. 1, Fig. 3 and Fig. 4, piston seat (25) front end of described shank (2) has the nut (24) that is connected with shank hook (8).There is the screw thread (81) that matches with nut (24) at shank hook (8) rear portion.Shank hook (8) middle part has the outstanding disk (82) of a fastening piston (3).Shank hook (8) front end has the rectangle drag hook (85) that matches with hook cavity volume (6).The clamp (83) that has self-desttruction equipment on the rectangle drag hook (85).Shank hook (8) is a triangle drag hook (84) foremost.

Referring to Fig. 5, has the through hole (32) that the nut (24) that can make shank (2) front end is inserted in the described shank piston (3); This shank piston (3) is oval column.The round hole (31) of matching with small column (27) on the shank piston seat (25) is arranged on the shank piston (3).Shank piston (3) can adopt thermoplastic elastomer (s); Above-mentioned piston hole (32) appropriate section is slightly less than nut (24), can pass through the external force suit, to guarantee and firmly installation of shank (2).

Referring to Fig. 7, the surface of described hook cavity volume (6) has the rectangle perforate (66) similar to rectangle drag hook (85); Rectangle perforate (66) is goed deep into forming a cavity (61) that can allow rectangle drag hook (85) rotate to an angle behind drag hook cavity volume (6) certain depth.The round hole (64) of matching with self-destruction clamp (83) on the rectangle drag hook (85) is arranged on drag hook cavity volume (6) surface.Cavity (61) front end is reduced into a long and narrow narrow slit (65) that can allow shank hook (6) triangle drag hook (84) foremost pass through by two bluff pieces (62).This slit also is the path of medicinal liquid.The front end of hook cavity volume (6) is the nut (63) that matches with needle stand (7) rear end screw thread (71).

Referring to the nut (63) of Fig. 7, described hook cavity volume (6) front end, it is the manhole (69) of hollow, and the rear portion is reduced into a long and narrow narrow slit (65) that can allow shank hook (6) triangle drag hook (84) foremost pass through by two bluff pieces (62).This through hole (69) not only is the path of medicinal liquid, also is the cavity of triangle drag hook (84) rotation.

Again referring to Fig. 8, described needle stand (7) rear end screw thread (71) is the manhole of the hollow that matches with the nut (63) of hook cavity volume (6) front end.

Referring to Fig. 6, Fig. 8, the center of described needle stand (7) has through hole (74), its middle part has a round pin card (73), and again referring to Fig. 1 and Fig. 2, the pilot hole (13) of described syringe (1) bottom center is the circular hole that a circular pricker card (73) that can make needle stand (7) can pass after a little firmly.Needle stand piston (4) is oval column, and its external diameter and syringe (1) internal diameter matches, and its center has needle stand hole (41), and this needle stand hole (41) can close fit needle stand (7).For preventing needle stand piston (4) slippage when retracting, has catch (72) on the pricker seat (7).Needle stand (7) front end is the screw thread (75) that pin is installed.

Referring to Fig. 1 and Fig. 2, pin medicated cap (16) is formed in one with syringe (1) again, and the centre has weak destructible device (17), and it is uncovered that its end has and syringe (1) bottom circular aperture (13) matches, and has the circular slotted hole that can hold pin in it.

Return Fig. 1, during this utility model assembling, needle stand piston (4) is nested on the nut (63) of hook cavity volume (6) earlier, again syringe needle is installed needle stand (7), screw on needle stand (7) again, make four to become one.Because needle stand piston (4) is made for thermoplastic elastomer (s), it cooperates the back is tight fit.The part that will assemble is inserted in to the syringe front portion from the rear portion of syringe (1) then, and the round pin card (73) of needle stand (7) is also tightened from the bottom surface that syringe bottom pilot hole (13) stretches out syringe (1); Shank piston (3) is nested on the front end nut (24) of shank (2) again, screws on shank hook (8) again, the three is become one; It being inserted in the syringe part that assembles gets final product again.During use, earlier pin medicated cap (16) is separated with syringe (1), drawn needle bar outward again, the suction medicinal liquid is injected then, and it uses with to have syringe now identical.After injection finishes, because oval-shaped positioning function, the rectangle drag hook (85) of shank is just in time aligned with the rectangle perforate (66) of linking up with cavity volume (6), drag hook (85) is entered in the cavity (61) of hook cavity volume (6), shank hook (8) triangle drag hook (84) foremost then enters in the slit (65) that is formed by bluff piece (62) in the hook cavity volume (6), rotates shank (2) then; This moment, the weakness ring (26) of shank was also destroyed; And shank is linked up with the self-destruction clamp (83) that makes rectangle drag hook (85) that also rotates to an angle and is entered into the circular hole (64) of linking up with the cavity volume surface, finishes the structure self-destruction; In this simultaneously, triangle drag hook (84) is angled with slit (65).Drawn needle bar (2) outward then; shank this moment (2) draws syringe (1) inside together with shank hook (8), needle stand piston (4), hook cavity volume (6), needle stand (7) and pin; reuse power fractures shank (2); perhaps shank is reversed; connecting screw between shank (2) and the shank hook (8) can be turned on; can withdraw from shank (2), and remainder just is left in the syringe, reaches the purpose of destructive protection.

Claims (6)

1, a kind of utility model self-destroyed syringe of replaceable syringe needle includes oval syringe (1), shank (2), shank hook (8), hook cavity volume (6), needle stand (7); One end of shank (2) has handle (21), and handle (21) has symmetrical flap (29), and the other end has piston (3), and handle (21) is connected with shank piston (3) by the body of rod (22); It is characterized in that: the bottom center of syringe (1) has the pilot hole (13) that is used to install needle stand (7), and needle stand (7) and rear portion are assemblied on the syringe (1) by the hook cavity volume (6) that the is threaded needle stand piston (4) by the syringe inner bottom part with it; Has frangibility structure (23) on the above-mentioned body of rod (22); The cross section of the described body of rod is " ten " font structure, the groove easy to break that this easy folded structure has for perforate and body of rod suitable position at the body of rod (22) middle part.For making things convenient for shank piston seat (25) breaking plant (26) to come into force, shank is provided with weak spot (20).Pin medicated cap (16) is one-body molded with syringe (1), is provided with weak destructible device (17).

2, syringe according to claim 1 is characterized in that: the cross section of the above-mentioned body of rod is " ten " font structure, on this body of rod on four faces of the perforate of frangibility structural formula (23) " ten " word structure in the middle part of the body of rod (22); Said perforate (23) is a slot, and its perforated area is the 30%-80% of body of rod cross-sectional area.Breach on the shank (20), be exactly on four faces of shank (22) " ten " font with the junction of piston seat (25), be provided with vee (23); This breach (23) is connected with the interior circle of annular destructible device (26).

3, syringe according to claim 1 is characterized in that: the described shank body of rod (22) front end is connected with oval-shaped piston seat (25), has circular destructible device (26) on it and reaches the fixedly small column of oval piston (27).Have on the shank piston (3) and the corresponding round hole of small column (27) (31).This shank piston seat (25) front end has the nut (24) that is connected with shank hook (8).The through hole (32) that matches with nut (24) is arranged on the shank piston (3).There is the screw thread (81) that matches with nut (24) at shank hook (8) rear portion.Shank hook (8) middle part has the outstanding disk (82) of a fastening shank piston (3).Shank hook (8) front end has the rectangle drag hook (85) that matches with hook cavity volume (6).Has self-destruction clamp (83) on the rectangle drag hook (85).Shank hook (8) is a triangle drag hook (84) foremost.

4, according to claim 1 or 2 or 3 described syringes, it is characterized in that: described shank hook (8) part is stretched out shank piston (3), have a rectangle drag hook (85) in the end of stretching out piston portion, this rectangle drag hook (85) is symmetrically distributed around central shaft.Surface at hook cavity volume (6) has the rectangle perforate (66) similar to rectangle drag hook (85), and rectangle perforate (66) is goed deep into forming a cavity (61) that can allow rectangle drag hook (85) rotate to an angle behind drag hook cavity volume (6) certain depth.The round hole (64) of matching with self-destruction clamp (83) on the rectangle drag hook (85) is arranged on hook cavity volume (6) surface.Cavity (61) front end is reduced into a long and narrow narrow slit (65) that can allow shank hook (6) triangle drag hook (84) foremost pass through by two bluff pieces (62).This slit also is the path of medicinal liquid.The front end of hook cavity volume (6) is the nut (63) that matches with needle stand (7) rear end screw thread (71).Has the through hole (41) that matches with this nut (63) on the needle stand piston (4).

5, syringe according to claim 4, it is characterized in that: the center of needle stand (7) has through hole (74), its middle part has a round pin card (73), and the pilot hole (13) of described syringe (1) bottom center is the circular hole that a round pin card (73) that can make needle stand (7) can pass after a little firmly.Needle stand piston (4) is oval column, and its external diameter and syringe (1) internal diameter matches, and its center has needle stand hole (41), and this needle stand hole (41) can close fit needle stand (7).When preventing to retract, needle stand piston (4) slippage has catch (72) on the needle stand (7).Needle stand (7) front end is the screw thread (75) that pin is installed.

6, syringe according to claim 5 is characterized in that: for oval, pilot hole (13) is arranged at the syringe bottom at above-mentioned syringe (1).Syringe (1) inwall has the fixed annular protrusion of needle stand piston (4) (14) of increasing.Pin medicated cap (16) is formed in one with syringe (1), and the centre has weak destructible device (17).Its end has uncovered that pilot hole (13) matches bottom syringe (1), has the circular slotted hole that can hold in it.

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