CN2434000Y

CN2434000Y - Novel syringe

Info

Publication number: CN2434000Y
Application number: CN 00243818
Authority: CN
Inventors: 谢先明; 宋刚
Original assignee: 李赛玲
Current assignee: Li Sailing
Priority date: 2000-07-25
Filing date: 2000-07-25
Publication date: 2001-06-13
Anticipated expiration: 2010-07-25

Abstract

The utility model relates to a syringe belonging to medical appliances, which comprises an elliptic needle cylinder, a needle bar, a needle holder and a needle, 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 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, benefit to curative work, fast and simple operation, and capability of effectively controlling the circulation of disease sources which are brought by a used syringe because a needle head is exposed outside; therefore, the final purpose of disposable syringes is truly achieved.

Description

A kind of novel injector

This utility model relates to medical apparatus and instruments, is a kind of novel syringe.

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 the injection 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 lawless person 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 can carry out destructive to it after a kind of use that provides according to the existing existing defective of syringe to 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.

Syringe of the present utility model is realized in the following manner: this syringe includes syringe, shank, needle stand and pin; One end of shank has handle, and two ends have symmetrical flap, and its 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 its needle stand is assemblied on the syringe by the needle stand piston of syringe inner bottom part, has the frangibility 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.

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 shank is inserted needle stand, needle stand is rotated an angle can connect pin and withdraw in syringe together, 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; can firmly shank be twisted off after easy folded structure on the body of rod uses 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:

Installation diagram is an overall structure sketch map of the present utility model; Fig. 1 is the structural representation of syringe and pin medicated cap, and wherein Fig. 1 a is a left view, and Fig. 1 b is a front view, Fig. 1 c be B-B to view, Fig. 1 d is that A-A is to view.Fig. 2 is the structural representation of shank, and wherein Fig. 2 a is a front view, and Fig. 2 b is a top view, and Fig. 2 c, 2d are cutaway view, and Fig. 2 e is that A-A is to view.Fig. 3 is a shank piston structure sketch map, and wherein Fig. 3 c is the left view of piston, and Fig. 3 b is a front view, and Fig. 3 a is a vertical view.Fig. 4 is a needle stand piston structure sketch map, and wherein Fig. 4 a is a front view, and Fig. 4 b is a vertical view, and Fig. 4 c is a left view.Fig. 5 is the structural representation of pin, and wherein Fig. 5 a is a front view, and Fig. 5 b is a vertical view.Fig. 7 is the needle stand structural representation, and wherein Fig. 7 a is a front view, and Fig. 7 b is a vertical view, and Fig. 7 c is a upward view, and Fig. 7 d is that A-A is to view.Fig. 8 is the structural representation of back pad, and wherein Fig. 8 a is a vertical view, and Fig. 8 b is a front view.Fig. 9 is the structural representation of front pad, and wherein Fig. 9 a is a front view, and Fig. 9 b is a vertical view.

Referring to installation diagram, syringe of the present utility model includes syringe (1), shank (2), needle stand (7) and pin (5); One end of shank (2) has handle (21), and its two ends have symmetrical flap (29), and its other end has shank piston (3), and handle (21) is connected with piston (3) by the body of rod (22); The bottom center of syringe (1) has the pilot hole that is used to install needle stand (7), and needle stand (7) is positioned on the syringe (1) by the needle stand piston (4) of syringe inner bottom part.Pin medicated cap (6) is one-body molded with syringe (1), and weak destructible device (61) is arranged, and uses preceding with its destruction, to reach disposable application target.The above-mentioned body of rod has the frangibility structure on (22), and 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. 2 a, Fig. 2 c and Fig. 2 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. 1 a, Fig. 1 b and Fig. 1 d, above-mentioned syringe (1) is an ellipticity, and its end has the outer hand rest of opening (11).

Referring to Fig. 2, the described shank body of rod (22) bottom is connected with circular piston seat (25), the center of this piston seat (25) has the axis of the piston (28) that is used for suit shank piston (3), has a disk (26) that is used for fixing shank piston (3) on this axis of the piston (28).Referring to figure (3), has the through hole (33) that the axis of the piston (28) and disk (26) are inserted in the described shank piston (3) again; The similar oval column of this piston (3), its elliptic cylinder mid portion indent and one bottom surface are to central evagination.Piston (3) front end has rectangle perforate (31), and this piston (3) can adopt thermoplastic elastomer (s); Above-mentioned piston hole (33) appropriate section is slightly less than the axis of the piston (28) and disk (26), can pass through the external force suit, firmly installs to guarantee piston.The axis of the piston (28) bottom has groove (24), and back pad (8) can easily be assembled.Have fluting (82) and perforate (81) on the back pad (8).

Referring to figure (7), described needle stand (7) has the annular pin card (72) of mounting of syringe syringe needle, and the center of this needle stand (7) has through hole (74).Its middle part has a pair of fan-shaped catch (75), and the arc chord angle of this fan-shaped catch (75) is most preferably less than 45 degree, and the arc chord angle of selecting for use among the figure is 30 degree, and its bottom has chuck (71).Again referring to installation diagram and Fig. 1, the pilot hole of described syringe (1) bottom center is can make center hole (13) that the pin card (72) of needle stand (7) passes and communicate with circular hole (13) and can make constituting around the symmetric a pair of scallop hole of central shaft (14) that fan-shaped catch (75) passes by one, therefore this center hole (13) can guarantee that the pin card (72) of needle stand (7) passes, and the arc chord angle of this scallop hole (14) be not less than at least needle stand catch (75) arc chord angle so that a pair of catch (75) of needle stand pass smoothly, the arc chord angle that is reflected among the figure is bigger than the arc chord angle of needle stand catch (75), and its arc chord angle is 45 degree.Again referring to figure (4), have the needle stand piston (4) that needle stand is installed at the syringe inner bottom part in addition, this needle stand piston (4) is oval column, and its external diameter and syringe internal diameter match; The center of described needle stand piston (4) has the needle stand hole, and this needle stand hole has the expansion of energy close fit needle stand chuck (71).

Referring to scheming (4), above-mentioned described needle stand hole is by making needle stand chuck (71) and shank latch (27) pass end hole (43), can holding and block the mider hole (42) and and identical base apertures (41) the three parts formation in needle stand middle part of needle stand chuck (71) again.

Referring to installation diagram and Fig. 2, described the axis of the piston (28) stretches out piston (3), has a pair of latch (27) in the end of the axis of the piston that stretches out piston portion, this latch (27) is fan-shaped and is symmetrically distributed around its central shaft, the arc chord angle of fan-shaped latch (27) is generally less than 45 degree, and the arc chord angle of the fan-shaped latch (27) shown in the figure is 30 degree.Again referring to Fig. 7 a, Fig. 7 c and Fig. 7 d, similar and the bigger fan-shaped perforate (76) of latch (27) that has a contrast pistons end place in the bottom surface of chuck (71), the arc chord angle of the fan-shaped perforate (76) shown in the figure is 45 degree, and latch (27) is inserted in the perforate (76); Perforate (76) is goed deep into holding the cavity volume (73) of latch (27) around its center rotation expansion formation one behind chuck (71) certain depth, this cavity volume (73) foot can make latch (27) rotate the angle that is not less than the latch arc chord angle, and the arc chord angle of the cavity volume shown in the figure (73) is 90 degree.

Again referring to installation diagram, Fig. 1 and Fig. 4, a pair of in above-mentioned syringe bottom have female parts (12) on the appearance wall of adjacent in the same way with scallop hole (14), its female parts (12) is 1/4th oval and its arc chord angle is bigger than needle stand catch, is convenient to needle stand and is installed in syringe bottom back rotation needle stand catch with fixing needle stand.

Referring to installation diagram and Fig. 1, pin medicated cap (6) is formed in one with syringe (1) again, and the centre has weak destructible device (61), 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 (5) in it.

Return installation diagram, during this utility model assembling, earlier needle stand (7) is inserted in the needle stand piston (4), needle stand chuck (71) just places the mider hole (42) in needle stand hole, because the needle stand piston is that thermoplastic elastomer (s) is made, it cooperates the back is tight fit, installs front pad (9) additional at needle stand piston (4) front end again, goes up assembling pin (5) at pin card (72); Then the needle stand (7) that assembles is inserted in to the syringe bottom from the open top of syringe (1), makes the fan-shaped catch (75) of needle stand make fan-shaped catch (75) place the female parts (12) of syringe bottom from bottom surface and the rotation that syringe bottom pilot hole (13) stretches out syringe (1); Being inserted in the shank (2) that assembles again gets final product.During use, earlier pin medicated cap (6) 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; make fan-shaped perforate (76) on shank latch (27) and the needle stand chuck just in time to good; make its latch (27) enter needle stand cavity volume (73); rotating needle stand (7) to certain angle then aligns the scallop hole (14) of fan-shaped catch (75) bottom syringe of needle stand; at this moment shank latch (27) is owing to the rotation of needle stand cavity volume (73) enters draw-in groove; drawn needle bar (2) outward then; shank this moment (2) is together with needle stand piston (4); needle stand (7) and pin (5) enter in the syringe (1) together, and reuse power fractures shank (2) can reach the purpose of destructive protection.

Claims

1, a kind of novel syringe includes oval syringe (1), shank (2), needle stand (7) and pin (5); One end of shank (2) has handle (21), and its two ends have symmetrical flap (29), and its other end has piston (3), and handle (21) is connected with piston (3) by the body of rod (22); It is characterized in that: the bottom center of syringe (1) has the pilot hole that is used to install needle stand (7), and needle stand (7) is assemblied on the syringe (1) by the needle stand piston (4) of syringe inner bottom part; The above-mentioned body of rod has the frangibility structure on (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.Pin (5) closely cooperates by the syndeton and the needle stand (7) of needle stand (7) front end.Pin medicated cap (6) is one-body molded with syringe (1), is provided with weak destructible device (61).

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 30%～80% of a body of rod cross-sectional area.

3, syringe according to claim 1, it is characterized in that: the described shank body of rod (22) bottom is connected with circular piston seat (25), the center of this piston seat (25) has the axis of the piston (28) that is used for suit oval piston (3), has an outstanding disk (26) that is used for fixing piston (3) on this axis of the piston (28).The axis of the piston (28) front end has the wing dish (27) that matches with needle stand (7).

4, according to claim 1 or 2 or 3 described syringes, it is characterized in that: described needle stand (7) has the annular pin card (72) of mounting of syringe syringe needle, tool screw thread in it.The center of this needle stand (7) has through hole (74), and its middle part has a pair of fan-shaped catch (75), and its bottom has chuck (71); The pilot hole of described syringe (1) bottom center is can make the annular pin card (72) of needle stand (7) pass center hole (13) and communicate with circular hole (13) and can make constituting around the symmetric a pair of scallop hole of central shaft (14) that fan-shaped catch (75) passes by one; Said needle stand piston (4) is oval column, and its external diameter and syringe internal diameter match, and its center has the needle stand hole, and this middle part, needle stand hole has the expansion of energy close fit needle stand chuck (71).Needle stand piston (4) front end has a front pad (9) during assembling.

5, syringe according to claim 4 is characterized in that: the arc chord angle of described fan-shaped catch (75) is for spending less than 30; The arc chord angle of scallop hole (14) is less than 45 degree.

6, syringe according to claim 4, it is characterized in that: the axis of the piston of described shank (2) stretches out piston (3), have a pair of latch (27) in the end of the axis of the piston that stretches out piston portion, this latch (27) is fan-shaped and is symmetrically distributed around its central shaft; Bottom surface at the chuck (71) of above-mentioned needle stand (7) has a pair of fan-shaped perforate (76) similar to the latch (27) at pistons end place, and perforate (76) gos deep into forming one around its center rotation expansion behind chuck (71) certain depth can hold the cavity volume (73) of latch (27).Above-mentioned the axis of the piston (3) bottom has the groove (24) that matches with back pad (8).

7, syringe according to claim 6 is characterized in that: the arc chord angle of above-mentioned fan-shaped latch (27) is less than 30 degree, and the arc chord angle of described fan-shaped perforate (76) is less than 45 degree, and the arc chord angle of described cavity volume (73) is less than 90 degree.

8, syringe according to claim 4 is characterized in that: be ellipse at above-mentioned syringe.A pair of scallop hole (14) is arranged at syringe bottom, and it has female parts (12) on appearance wall of adjacent in the same way, and its female parts (12) also is 1/4th ellipticities.

9, syringe according to claim 1 is characterized in that: be formed in one at described pin medicated cap (6) and syringe (1), the centre has weak destructible device (61).What its end had and syringe (1) bottom circular aperture (13) matches is uncovered, has the circular slotted hole that can hold pin (5) in it.