CN101318040B - Improved barrel type push bar for needle whip-back type safety syringe and syringe thereof - Google Patents

Improved barrel type push bar for needle whip-back type safety syringe and syringe thereof Download PDF

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CN101318040B
CN101318040B CN 200810111535 CN200810111535A CN101318040B CN 101318040 B CN101318040 B CN 101318040B CN 200810111535 CN200810111535 CN 200810111535 CN 200810111535 A CN200810111535 A CN 200810111535A CN 101318040 B CN101318040 B CN 101318040B
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needle
ro
sleeve
bump
barrel
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CN 200810111535
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Chinese (zh)
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CN101318040A (en )
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刘文杰
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刘文杰
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Abstract

本发明涉及一种改进的用于针头回缩式安全注射器的筒式推杆,该筒式推杆包括筒体、针头回缩触发器和支撑件,所述筒体头部套有密封胶垫,其中,所述针头回缩触发器设在筒体的筒腔的前端;所述支撑件设置在所述筒体内,其前端支承所述针头回缩触发器;所述筒体和所述支撑件上设有相互适配的卡合结构,组装时,支撑件可脱开地卡接在筒体内;所述支撑件在脱开与筒体的卡接后,能够在针头回缩力的作用下与所述针头回缩触发器一起向后位移,以使所述针头回缩至筒体或针座套筒内。 The present invention relates to an improved cartridge for needle-retracting safety syringe plunger, the pusher comprising a cartridge barrel, a needle retracted trigger and a supporting member, said cylinder head cover a sealing pad , wherein said needle retracted trigger is provided at the front end of the cylinder barrel chamber; said support member disposed within said barrel, the front end of the support which the needle retracted trigger; said tubular body and said support an engaging structure adapted to each other member of the assembly, the support member may be releasably locked to the barrel; disengaged from the support cylinder after snap acting member can be a needle retraction force in the displacement of the needle retraction trigger back together, so that the needle retraction or a needle sleeve barrel to barrel. 本发明还涉及一种包含上述改进的筒式推杆的回缩式安全注射器。 The present invention further relates to a retractable safety syringe comprising the above-described improved cartridge plunger.

Description

一种改进的用于针头回缩式安全注射器的筒式推杆及注射器 The plunger of the syringe barrel and an improved method for the needle-retracting safety syringe

技术领域 FIELD

[0001] 本发明涉及一种医疗器械,特别是一种改进的用于针头回缩式安全注射器的筒式推杆,以及一种包含有上述筒式推杆的注射器。 [0001] The present invention relates to a medical instrument, particularly to an improved needle for retracting safety syringe plunger of a cartridge, and a cartridge comprising the above-described syringe plunger.

背景技术 Background technique

[0002] 注射器是医疗领域中需要经常并且大量使用的医疗器械。 [0002] The syringe is a medical instrument in the medical field require frequent and extensive use. 如果注射器被重复使用,就很容易造成疾病在不同患者间的传播,造成交叉感染,危及公众的健康。 If the syringe is reused, it is likely to cause the spread of diseases between different patients, resulting in cross-infection and endanger public health. 一些人为了谋取非法利益,收集已经使用过的废弃的一次性注射器,并再次投入医疗市场,为许多疾病的扩散和传播埋下了巨大的隐患。 Some people in order to reap illegal profits, have been used to collect discarded disposable syringes, and put into the health care market again, it planted a huge risk for the proliferation and spread of many diseases. 同时,医务人员在注射完毕后,由于针头外露,可能会刺伤医务人员或者废物收集人员, 造成疾病感染或者传染。 Meanwhile, medical personnel after injection, due to the exposed needle could hurt medical personnel or waste collection personnel, infection or disease caused by infection.

[0003] 为了阻止注射器被重复使用,使其在经过一次使用后即自行毁坏,真正做到只能一次性使用,并防止被使用过的注射器刺伤的意外发生,有人提出了关于针头回缩式一次性注射器的技术方案,并在此基础上对注射器的筒式推杆进行了改进,以实现注射器的自毁和针头回缩的可控性。 [0003] In order to prevent the syringe is reused, it destroyed itself through after a single use, truly a one-time use only, and to prevent the use of syringes stabbed accident, was raised on needle retraction disposable syringes aspect, and on this basis, of the plunger of the syringe barrel has been improved to achieve a self-destruction of the syringes and the controllability of the needle retraction.

[0004] 如ZL200520015704.2号中国发明专利,提出了新的用于针头回缩式安全注射器的筒式推杆,同时提出了使用上述筒式推杆的安全注射器,该技术方案通过筒式推杆的外筒和内筒的配合关系来控制承托片,并利用承托片来控制推柱及其所松脱的针座的回缩,从而实现注射器在注射完毕时的针头回缩的可控性,同时避免重复使用,并消除了因注射完毕后针头暴露在外面而容易发生刺伤事故的风险。 [0004] The Chinese patent No. ZL200520015704.2, proposes a new cartridge for needle-retracting safety syringe plunger, while using the proposed safety syringe cartridge push rod, pushing this solution through a cartridge relationship with the outer cylinder and inner cylinder rod supporting sheet is controlled, using a control push pin supporting plate to the hub and the retraction of the release, enabling the syringe at the completion of the injection needle can be retracted control, while avoiding re-use, and eliminates the risk of needle after the injection is completed exposed and prone to stab accident.

[0005] 该技术方案虽然能实现注射器的针头在注射后回缩的可控性,但其技术方案存在以下缺陷:第一,该筒式推杆技术方案的结构比较复杂,加工难度较大,组装程序也相对比较复杂,因而加工成本较高;第二,由于该筒式推杆的结构比较复杂,难以适用于小毫升的注射器如Iml注射器。 [0005] Although this solution enables the controllability of the syringe needle retraction after the injection, but there are technical scheme following defects: first, the structure of the cartridge plunger aspect is more complicated, difficult processing, assembling procedure is relatively complex and therefore high processing cost; second, since the push rod cartridge structure is complicated, it is difficult for small syringes as Iml ml syringe.

发明内容 SUMMARY

[0006] 本发明的目的在于克服现有技术中的上述缺陷,提供一种结构简单、易于加工组装并能实现针头可控式回缩的筒式推杆,同时提供一种装有这种筒式推杆的注射器。 [0006] The object of the present invention is to overcome the above drawbacks of the prior art, provide a simple, easy to process and assemble can be realized controllable retraction of the needle cartridge pusher, this also provides a cartridge containing putter syringe.

[0007] 为实现上述发明目的,本发明提供一种改进的用于针头回缩式安全注射器的筒式推杆,它包括筒体、针头回缩触发器和支撑件,所述筒体头部套有密封胶垫,其中,所述针头回缩触发器设在筒体的筒腔的前端,所述支撑件设置在所述筒体内,其前端支承所述针头回缩触发器,所述筒体和所述支撑件上设有相互适配的卡合结构。 [0007] In order to achieve the above object, the present invention provides an improved cartridge for needle-retracting safety syringe plunger, comprising a barrel, a needle retracted trigger and a supporting member, said cylinder head a sealing sleeve pad, wherein the front end of the needle retracted trigger is provided in the cylinder chamber of the cylinder, the support member disposed within said barrel, the front end of the needle bearing retraction trigger, the cartridge an engaging structure adapted to each other on the body and the support member. 组装时,支撑件可脱开地卡接在筒体内,所述支撑件在脱开与筒体的卡接后,能够在针头回缩力的作用下与所述针头回缩触发器一起向后位移,以使所述针头回缩至筒体或针座套筒内。 In assembly, the support member may be releasably locked to the barrel, said supporting member of the barrel after disengagement card into contact with the needle can be retracted under the action of a needle retraction trigger force rearwardly with displacement, so that the needle retraction or a needle sleeve barrel to barrel.

[0008] 所述支撑件为一个前端封闭的筒状体,所述针头回缩触发器承托在所述支撑件的前端面上。 [0008] The front end of the support member is a tubular body closed, said needle retracted trigger supporting the front face of the support member. [0009] 所述支撑件还可以为一个前端开口的筒状体,,该筒状体的前端支承所述一承托片,所述针头回缩触发器承托在所述承托片上。 [0009] The support member may also be a front end opening of the cylindrical body supports the front end ,, said tubular body supporting a sheet, said needle retracted trigger supporting said supporting sheet.

[0010] 所述针头回缩触发器为一前部封闭的推柱。 [0010] The needle retracted trigger is a pushing post front portion closed. 组装后,推柱的前端突出于筒体前端的筒腔开口和密封胶垫之外,且突出部分呈端部平齐的管状结构,或呈端部具有纵向齿状凸起的管状结构。 After assembly, the front end of the push pin cylinder projecting in the front end opening of the barrel chamber and the outside of the sealing pad, and the projecting end portion of tubular configuration flush, or in a tubular structure having a longitudinal end portion of the serrations.

[0011] 所述支撑件后部的筒壁上开有至少一个开口,每一开口后沿的筒壁上设有一根沿筒状体的轴向向前延伸的弹性条,所述弹性条外壁上设有一个第一凸块,所述第一凸块为半球形、三角形或顶端面为斜面的其他形状。 [0011] The cylindrical wall of the rear support member has at least one opening is open, the rear opening of each cylinder wall is provided with an elastic strip along the axial direction of the cylindrical body, a forwardly extending, outer wall of the elastic strip It is provided with a first bump on the first bump hemispherical, triangular, or other shapes to the top surface of the inclined surface. 所述筒体的筒壁在与所述第一凸块适配的位置上开有窗口。 Cylindrical wall of the barrel in the first bump on the fitting position with a window opening. 组装时,第一凸块支承在窗口的后沿上,并凸出于窗口之外,从而使所述的支撑件可脱开地卡接在筒体内。 In assembly, the first projection is supported at the rear edge of the window, and protrudes outside the window so that said supporting member can be releasably locked to the barrel.

[0012] 所述的开口和窗口可以均为相对设置的两个,每一开口中均设有一根弹性条,在每根弹性条的外壁上相同位置处均设有一个第一凸块。 [0012] The opening and window are two oppositely disposed, each opening has an elastic strip, the same position at the outer wall of each elastic strip are provided with a first bump.

[0013] 所述两个相对的窗口设置在筒体中后部的筒壁上,所述的支撑件包括一个底座、两根弹性条和一根“T”型支撑条,“T”型支撑条的前端面呈“ + ”型、“X”型、“又”型或圆面型,弹性条和支撑条均设置在底座的前端面上,并沿筒体的轴向向前延伸,两根弹性条的外壁上各设有一个第一凸块,第一凸块为半球形、三角形或顶端面为斜面的其他形状。 [0013] The two opposing windows disposed on the rear wall of the cylinder barrel, said support member comprises a base, two elastic strips and a "T" shaped supporting bar, the "T" support appear before the front end of article "+" type, "X-," type "and" type or a round face, the elastic strip and the support bar are provided on the front end surface of the base and extend forwardly along the axial direction of the cylinder, two an outer wall of elastic strips each provided with a first bump, the bump is a first hemispherical, triangular, or other shapes to the top surface of the inclined surface. 所述支撑条的前端面支承所述针头回缩触发器。 The front end of the support surface of the support bar the needle retracted trigger. 组装时,第一凸块支承在窗口的后沿上,并凸出于窗口外,从而使支撑件可脱开地卡接在筒体内。 In assembly, the first projection is supported at the rear edge of the window, and protrude from the window, so that the support member may be releasably locked to the barrel.

[0014] 所述筒体后`部的内壁上设有一圈凸起的止退环,以使所述支撑件和所述推柱向后位移至使所述针头回缩至筒体或针座套筒内后被再次卡阻在所述的止退环上。 [0014] After the cartridge is provided with a ridge around the retaining ring portion on the inner wall ', so that the column support member and said rearwardly displaced to push the needle retraction or a needle holder to the barrel after the inner sleeve again jammed in said retaining ring.

[0015] 所述的弹性条的外壁上还设有一个第二凸块,第二凸块设在所述第一凸块的后方,第一凸块的后端面与第二凸块的后端面之间的距离,等于或大于所述支撑件和所述推柱为了使针头能够回缩至筒体或针座套筒内所需要的向后位移距离。 An outer wall of the elastic strip [0015] The further provided with a second bump, the second bump disposed behind the first bump, the rear end surface of the first bump and a second bump rear end the distance between equal to or greater than said support member and a rearward displacement distance of said push pin to the barrel to the needle or needle-retractable sleeve barrel required. 第二凸块的凸起高度小于或等于第一凸块的凸起高度。 A second projection bump height less than or equal to the height of the first raised bumps. 组装时,第一凸块和第二凸块安装在所述的窗口中并凸出于窗口之外,第二凸块支承在所述窗口的后沿上,从而使支撑件可脱开地卡接在筒体内。 In assembly, the first bump and the second bump mounted in the window and protrudes outside the window, the second projection is supported on the trailing edge of the window, so that the support may disengageably connected to the cylinder body.

[0016] 所述筒体中后部的筒壁上开有至少一个窗口。 [0016] The rear wall of the cartridge barrel has at least one window opening. 所述支撑件中后部的筒壁在与每个窗口适配的位置上均开有开口,开口的前沿的筒壁上设有一条沿该筒状体的轴向向后延伸的弹性条,在弹性条的外壁上设有第一凸块,该第一凸块的形状、组装时的位置和作用与前述第一凸块相似。 The rear support member are cylindrical wall having an opening opened at a position adapted to each window on the leading edge of the cylinder wall is provided with an opening along the axial direction of the elastic strip of the tubular body extends rearwardly, in the outer wall of the elastic strip provided with a first protrusion, a shape of the first bump, the position and functions similar to the first bump during assembly.

[0017] 所述筒体的筒壁上设置的窗口和支撑件的筒壁上设置的开口可以均为对称的两个,所述的弹性条及其上设置的第一凸块也分别为对称的两组。 [0017] The cylindrical wall of the opening window provided in the cylinder wall and the support member may be provided two cylinder, said first bump and the elastic strip are symmetrically arranged respectively on the symmetrical the two groups. 在弹性条上还设有位于第一凸块后方的第二凸块,所述第二凸块的后端面与第一凸块的后端面之间的距离,等于或大于支撑件和所述推柱为了使针头能够回缩至筒体或针座套筒内所需要的向后位移距离,第二凸块的凸起高度等于或小于第一凸块的凸起高度,组装时,第一凸块和第二凸块均安装在窗口中并凸出于窗口之外,且第二凸块支承在窗口的后沿上,从而使支撑件可脱开地卡接在筒体内。 The resilient strip also has a second protrusion located behind the first bump, the distance between the rear end surface of the second bump rear end face of the first bump, and is equal to or greater than said push member support in order to retract the needle can be displaced rearwardly from the needle cylinder or barrel sleeve required, a second protrusion or bump height less than the height of the protrusion is equal to the first bump, in assembly, the first boss block and the second bump are mounted in the window and projects outside the window, and the second projection is supported on the trailing edge of the window, so that the support member may be releasably locked to the barrel.

[0018] 所述支撑件可以由一个前筒和一个后筒套接而成。 [0018] The support member may be a socket formed by a front barrel and a rear barrel. 所述前筒的后端与所述后筒的前端分别设有相互适配的套接结构,所述开口设在所述后筒的与所述前筒套接部位后方的 The rear end of the front barrel and the front end of the rear barrel are provided with a socket structure adapted to each other, the opening provided in the rear cylinder and said front cylinder portion of the rear socket

筒壁上。 Tube wall. [0019] 所述后筒前端的与所述前筒套接的部位的外径小于后筒的其他部分的外径,并与所述前筒的内径适配,所述后筒前端的与所述前筒套接的部位上设有一个定位块。 [0019] The outer diameter of the other portions of the outer diameter of the front cylindrical portion of the socket is smaller than the cylinder after the front end of the rear barrel, and adapted to the inner diameter of said front barrel, and the front end of the rear barrel a positioning block is provided with said front barrel portion of the socket. 所述前筒后端的与所述后筒套接的部位的筒壁上设有一个与所述定位块适配的定位槽或定位孔。 The tube wall and the rear portion of the cylindrical socket is provided with a rear end of the front barrel positioning groove or a positioning hole with the positioning block adapted. 所述第一凸块后方还设有一个第二凸块,且第一凸块的凸起高度大于或等于第二凸块的凸起高度,第一凸块的后端面与第二凸块的后端面之间的距离,大于或等于支撑件和所述推柱为了使针头能够回缩至筒体或针座套筒内所需要的向后位移距离。 The first projection has a rear block further second bump, and the bump height of the first projections is greater than or equal to the projection height of the second bump, the rear end face of the first bump and the second bump the distance between the rear end surface, is greater than or equal to the rearward displacement of the support member and the column to push the needle or needle-retractable sleeve to the cylinder barrel required distance. 组装时,第一凸块和第二凸块均安装在所述的窗口中并凸出于窗口之外,且第二凸块支承在窗口的后沿上,从而使所述的支撑件可脱开地卡接在筒体内。 In assembly, the first bump and the second bump are mounted in said window and protrudes outside the window, and the second projection is supported on the trailing edge of the window, so that the detachable support member snap apart in the barrel.

[0020] 本发明还包括一保护套筒,所述的保护套筒由一粗筒和一细筒连接而成。 [0020] The present invention further comprises a protective sleeve, said protective sleeve is connected to each other by a thick cylinder and a thin cylinder. 粗筒的内径大于或等于所述注射器的针筒外径,所述筒体后部的外壁上设有一圈凸缘,细筒的内径与筒体的外径适配,细筒的内壁上设有一圈能够与所述的凸缘卡合的凹槽。 Crude inner diameter of the barrel outside diameter greater than or equal to the syringe barrel, the outer wall of the rear portion of the cylindrical body provided with a ring flange, the inner diameter and the outer diameter of the narrow cylindrical barrel adapter, provided on the inner wall of the narrow cylindrical there circumferential groove of the flange can be engaged with said. 组装时,保护套筒套接于筒体的后端,通过凹槽与凸缘之间的卡合而固定,并使粗筒包围着所述筒体和所述支撑件之间的卡合部位。 In assembly, the rear end of the protective sleeve sleeved on the cylinder, is fixed by flanges between the groove and engaging, and the crude tube surrounds the engagement portion between said cylindrical body and said support member .

[0021] 可以用一针头承托件取代所述的针头回缩触发器,所述筒体在套装密封胶垫后露出一端部平齐或者端部具有纵向齿状凸起的管状前端。 [0021] The supporting member may be substituted by a needle retraction of the needle trigger, the barrel after the sealing pad set flush with the exposed end portion or distal end of the tubular portion having a longitudinal serrations.

[0022] 本发明还提供一种针头回缩可控式安全注射器,该注射器包含本发明的筒式推杆。 [0022] The present invention also provides a needle retraction controllable safety syringe according to the present invention comprises a cartridge plunger.

[0023] 本发明还提供一种针头回缩可控式安全注射器,该注射器包括针筒、固定有针头的针座、针座套筒、弹簧、0型密封圈和推杆,其中,所述推杆可采用上述筒式推杆中的任一种。 [0023] The present invention also provides a needle retraction controllable safety syringe comprising a barrel, a needle secured to the needle holder, the needle holder sleeve, springs, 0-rings and the push rod, wherein said can be any of the above tappet push rod in the cartridge. 所述针筒在其前端形成一向针筒的轴线方向收缩的肩部,再从所述肩部向前延伸出一个套管,套管在与所述肩部相连处的内壁上设有凸缘,套管的外壁上设有卡合、插接或螺纹连接结构。 Forming said syringe barrel has been contracted in the axial direction of a shoulder at its front end, and then extending forwardly from said shoulder a sleeve that is connected to a flange on the inner wall at the shoulder , the outer wall of an engaging sleeve, the plug or screw connection. 所述针座为一管状体,中间有一贯通孔,针头固定在针座的贯通孔中,针座的后端设有一喇叭形底座,针座安装在套管内。 The hub is a tubular body having a center through hole, the through hole in the needle hub fixed to the rear end of the needle hub is provided with a flared base, the needle hub is mounted within the sleeve. 所述0型密封圈套置在针座的喇叭形底座的窄部上,并与套管内壁上的凸缘配合,使针座可脱开地固定安装在套管内。 The 0-type seal ring disposed in the flared portion of the narrow base of the hub, and cooperate with a flange on the casing wall, the needle holder can be mounted releasably secured within the sleeve. 所述弹簧套置在针座上,其后端支承于针座的喇叭形底座上。 The spring sleeve disposed in the hub, which is supported on the rear end of the flared base of the needle hub. 所述针座套筒具有一向后开口的空腔,其内径与套管的外径适配,针座套筒的内壁上设有能`够与套管外壁上的卡合、插接或螺纹结构配合的卡合、插接或螺纹结构,针座套筒的闭合前端设有一针孔。 Said mounting sleeve has a rearwardly open cavity, which is adapted to the outer diameter of the inner diameter of the sleeve, it can 'be provided with an outer wall of the sleeve engaging the inner wall of the needle holder sleeve, the plug or screw mating engagement structure, the plug or screw structure, the closed front end of the needle holder sleeve is provided with a pinhole. 当针座套筒卡接、插接或螺纹连接在已安装有针座的套管上时,针头从所述针孔中伸出,针座套筒的闭合前端顶压着弹簧的前端,并将弹簧预压紧在该闭合前端与针座的喇叭形底座之间。 When the needle hub detent sleeve, the plug or screw connection has been installed on the cannula hub, the needle extending from the needle hole, the closed front end of the top front end of the needle hub sleeve pressing spring, and the spring pre-compressed between the closed front end of the needle hub flared base. 所述筒式推杆装在针筒内,当筒式推杆被推至针筒的筒腔尽头时,筒式推杆的管状前端推动0型密封圈进行整体或局部位移,从而松脱针座与套管之间的固定关系,同时,针筒的后端松脱所述筒式推杆中支撑件与筒体的卡接关系,并释放支撑件。 The push rod is mounted within the syringe cartridge, the cartridge when the plunger is pushed to the end of the syringe barrel chamber, the front end of the tubular barrel 0-ring pushing the plunger whole or partial displacement, thereby releasing the needle fixed relationship between the seat and the sleeve, while the rear end of the barrel support member releasably connected relationship with the cartridge plunger barrel card and releases the support member.

[0024] 所述针座套筒也可以包括一个第一套筒和一个第二套筒,第一套筒的前端闭合并设有针孔,第二套筒的后端内壁上设有凸缘,第二套筒与第一套筒通过螺纹连接、插接或卡接方式连接为一体,或者通过粘接或超声波焊接方式进行固定连接;所述0型密封圈套置在针座的喇叭形底座的窄部上,并与第二套筒后端内壁上的的凸缘配合,使针座可脱开地固定安装在针座套筒内;所述弹簧套置在针座上,其后端支承于针座的喇叭形底座上;针座安装在针座套筒内,针头从第一套筒前端的针孔中伸出,第一套筒的闭合前端顶压着弹簧的前端,并将弹簧预压紧在该闭合前端与针座的喇叭形底座之间;针座套筒与针筒的套管通过螺纹连接、插接或卡接方式可脱开地连接。 [0024] The hub sleeve may also include a first sleeve and a second sleeve, the sleeve distal end is closed and provided with a first pin hole, a flange of the rear end wall of the second sleeve , the second sleeve to the first sleeve by screwing, snap or plug integrally connected, or connected by an adhesive or fixed by ultrasonic welding; the 0-type seal ring disposed in the flared base of the needle hub the narrow portion, and cooperate with the flange on the inner wall of the rear end of the second sleeve, the needle holder may be releasably secured in the needle mounting cylinder sleeve; the spring is sleeved on the needle seat, the rear end a hub supported on the base of the horn; needle hub sleeve mounted on the barrel, the needle extends from the needle hole in the front end of the first sleeve, the closed front end of the top spring pressing the first sleeve distal end, and spring-pressed between the closure base flared distal end of the needle hub; the hub sleeve and the barrel sleeve by screwing, snap or plug releasably coupled manner.

[0025] 所述的第一套筒前端的针孔具有向内的喇叭形结构,所述针座的前部也设有与所述喇叭形结构形状相配的锥形结构,组装后,所述针孔的喇叭形结构通过与针座前部的锥形结构相互配合而固定针座。 [0025] The front end of the first sleeve having a pinhole according inwardly flared structure, the front portion of the hub structure is also provided with a shape matching the flared conical configuration, after assembly, the pinholes horn structure is fixed by the tapered structure of the front hub portion cooperating hub.

附图说明 BRIEF DESCRIPTION

[0026] 下面将通过附图对本发明进行说明,其中: [0026] Next will be described the present invention by the accompanying drawings, wherein:

[0027] 图1为本发明的筒式推杆的实施例1的剖视图; Example 1 is a sectional view [0027] FIG pusher cartridge 1 of the present invention embodiment;

[0028] 图2为本发明的筒式推杆的实施例2的剖视图; Example 2 a sectional view of the [0028] present invention. FIG. 2 cartridge pusher embodiment;

[0029] 图3为本发明的筒式推杆的实施例1-4中的推柱的剖视图; Push column cross-sectional view of Example 1-4 cartridge plunger [0029] FIG. 3 of the present invention;

[0030] 图4为一支撑件的剖视图,该支撑件可适用于本发明的筒式推杆的实施例1 ; [0030] FIG. 4 is a sectional view of a support member, the support member may be applied to the embodiment of Example 1 of the present invention, cartridge plunger;

[0031] 图5为图4中所示支撑件的立体图; [0031] FIG. 5 is a perspective view of the support shown in Figure 4;

[0032]图6为另一支撑件的剖视图,该支撑件可适用于本发明的筒式推杆的实施例1 ; [0032] FIG. 6 is a cross-sectional view of another support member, the support member may be applied to the embodiment of Example 1 of the present invention, cartridge plunger;

[0033] 图7为另一支撑件的剖视图,该支撑件可适用于本发明的筒式推杆的实施例1 ; [0033] FIG. 7 is a cross-sectional view of another support member, the support member may be applied to the embodiment of Example 1 of the present invention, cartridge plunger;

[0034] 图8为本发明的筒式推杆的实施例1、2和4中的筒体的剖视图; 2 and a cross-sectional view of the barrel Example 4 [0034] FIG. 8 of the present invention, cartridge plunger embodiment;

[0035] 图9为本发明的筒式推杆的实施例1中的支撑件的剖视图; A cross-sectional view of a support member according to embodiment 1 of the cartridge push rod [0035] FIG. 9 of the present invention;

[0036] 图10为本发明的筒式推杆的实施例1 -3中的筒体的剖视图; Sectional view of the barrel in Example 1-3 cartridge plunger [0036] FIG. 10 of the present invention;

[0037] 图11为本发明的筒式推杆的实施例2中的支撑件的剖视图; [0037] FIG. 11 is a sectional view of the support member in the plunger barrel 2 of the present embodiment of the invention;

[0038] 图12为本发明的筒式推杆的实施例4中的支撑件的剖视图; [0038] sectional view of the support member 12 in FIG. 4 of the present invention, cartridge plunger embodiment;

[0039] 图13为图12所示支撑件的立体分解图; [0039] FIG. 13 is an exploded perspective view of the support member 12 as shown;

[0040] 图14为本发明的筒式推杆的实施例3中的支撑件的立体图; A perspective view of a support member 3 [0040] FIG cartridge plunger 14 of the present invention embodiment;

[0041] 图15为本发明的筒式推杆的实施例5中的支撑件的立体图; A perspective view of the support of Example 5 [0041] FIG cartridge plunger 15 of the present invention embodiment;

[0042] 图16为本发明的筒式推杆的保护套筒的剖视图; [0042] FIG. 16 is a cross-sectional view of the protective sleeve of the present invention, cartridge plunger;

[0043] 图17为本发明的注射器的实施例1的剖视图; Example 1 is a sectional view of Embodiment [0043] FIG syringe 17 of the present invention;

[0044] 图18为本发明的注射器的实施例2的剖视图; Example 2 a sectional view of the embodiment [0044] FIG. 18 of the present invention, the syringe;

[0045] 图19为本发明的注射器的实施例2中的针座套筒的剖视图。 Sectional view of the needle holder sleeve of Example 2 [0045] FIG. 19 is the syringe of the present invention.

具体实施方式 detailed description

[0046] 本发明提供一种改进的用于针头回缩式安全注射器的筒式推杆。 [0046] The present invention provides an improved cartridge for the needle-retracting safety syringe plunger. 下面通过以下示例性实施例对本发明的筒式推杆进行说明。 Here will be described the present invention by the cartridge push rod following exemplary embodiments.

[0047] 实施例1: [0047] Example 1:

[0048] 图1、3_10和16示出本发明的筒式推杆的实施例1。 [0048] FIG. 16 shows a cartridge and 1,3_10 putter of the present invention in Example 1. 该筒式推杆包括筒体1、针头回缩触发器、支撑件3和一承托片4,所述筒体I头部套有密封胶垫5,其中,所述针头回缩触发器设在筒体I的筒腔的前端,所述支撑件3设置在所述筒体I内。 The cartridge includes a plunger barrel 1, a needle retracted trigger and a supporting member 3 supporting plate 4, the cylinder head cover I sealing pad 5, wherein said needle retracted trigger is provided in the front end of the cylinder barrel chamber I of the support member 3 disposed within the barrel I. 所述支撑件3为一个前端开口的筒状体,该筒状体3的前端支承所述承托片4,所述针头回缩触发器承托在所述承托片4上。 The support member 3 is a front end opening of the tubular body, the front end of the support body 3 of the tubular supporting sheet 4, said needle retracted trigger supporting sheet 4 on said support. 所述筒体I和所述支撑件3上设有相互适配的卡合结构。 Said support member and said tubular body I is provided with mutually adapted engaging structure 3. 组装时,支撑件3可脱开地卡接在筒体I内,所述支撑件3在脱开与筒体I的卡接后,能够在针头回缩力的作用下与所述针头回缩触发器一起向后位移,以使所述针头回缩至针座套筒19内。 In assembly, the support member 3 can be releasably locked to the inner barrel I, the support member 3 in the cylindrical body I disengaged card into contact with the needle can be retracted under the action of a needle retraction force rearward displacement of trigger together, so that the needle is retracted into the needle holder sleeve 19.

[0049] 所述针头回缩触发器为一前部封闭的推柱2。 [0049] The needle retracted trigger is a pushing post a closed front portion 2. 组装后,推柱2的前端突出于筒体I前端的筒腔开口和密封胶垫5之外,且突出部分呈端部平齐的管状结构。 After assembly, the front end than the push pin cylinder cavity opening seal pad 5 and the front end of the cylindrical body protrudes I 2, and the projecting end portion of tubular configuration flush. 根据本实施例的一变型,所述突出部分也可呈端部具有纵向齿状凸起的管状结构。 According to a variant of the embodiment according to the present embodiment, the projecting portion may also be in an end portion of a tubular structure having a longitudinal serrations.

[0050] 所述筒体I中后部的筒壁上开有两个窗口101,所述支撑件3中后部的筒壁在与每个窗口101适配的位置上均开有开口302,开口302的前沿的筒壁上设有一条沿该筒状体的轴向向后延伸的弹性条6,在每根弹性条6的外壁上都设有第一凸块601和第二凸块602,其中,第一凸块601为半球形、三角形或顶端面为斜面的其他形状。 [0050] The cylindrical rear portion of the cylinder wall I opened two windows 101, the support member in the cylindrical wall of the rear portion 3 has an opening 302 in the adapter 101 are apart from the position of each window, the leading edge 302 of the cylinder wall is provided with an opening along an axial direction of the elastic strip of the tubular body 6 extending rearward in the outer wall of each of the elastic strip 6 is provided with the first protrusion 601 and second protrusion 602 wherein the first hemispherical protrusion 601, triangle or other shapes to the top surface of the inclined surface. 组装时,第一凸块601支承在窗口101的后沿上,并凸出于窗口101之外,从而使支撑件3可脱开地卡接在筒体I内。 In assembly, the first projection 601 is supported on the trailing edge of the window 101, and protrudes outside the window 101, so that the supporting member 3 can be releasably locked to the inner barrel I. 第二凸块602设在所述第一凸块601的后方,第一凸块601的后端面与第二凸块602的后端面之间的距离,等于或大于所述支撑件3和所述推柱2为了使针头能够回缩至针座套筒19内所需要的向后位移距离,第二凸块602的凸起高度小于或等于第一凸块601的凸起高度。 A second bump 602 provided in the rear of the first protrusion 601, the distance between the rear end surface of the first bump 601 and the rear end surface of the second protrusion 602, is equal to or larger than the support member 3 and the column 2 in order to push the needle to the needle holder retractable sleeve 19 rearward displacement distance required, a second protrusion 602 is equal to or less than the height of the first convex protrusion height of the protrusion block 601. 组装时,第一凸块601和第二凸块602均安装在所述的窗口101中并凸出于窗口101之外,且第二凸块602支承在所述窗口101的后沿上,从而使支撑件3可脱开地卡接在筒体I内。 In assembly, the first bump 601 and a second bump 602 are mounted in the window 101 and protrudes outside the window 101, and the second projection 602 is supported on the trailing edge of the window 101 to the support member 3 can be releasably locked to the inner barrel I. 根据本实施例的一变型,第一凸块601的后端面与第二凸块602的后端面之间的距离,可以等于或大于所述支撑件3和所述推柱2为了使针头能够回缩至筒体I内所需要的向后位移距离。 According to a variant of the embodiment according to the present embodiment, the distance between the rear end surface of the rear end face 601 of the first bump and the second bump 602, may be equal to or larger than the support member 3 and the push pin 2 to be able to return the needle reduced to the inner cylinder rearward displacement distance I needed.

[0051] 所述筒体I后部的内壁上设有一圈凸起的止退环,以使所述支撑件3和所述推柱2向后位移至使所述针头回缩至针座套筒19内后被再次卡阻在所述的止退环上。 [0051] The retaining ring is provided with a ridge around the inner wall of the rear portion of the barrel I, so that the support member 3 and the push pin 2 is displaced to rearward retraction of the needle to the needle sleeve after the inner cylinder 19 again jammed in said retaining ring.

[0052] 所述筒式推该还包括一保护套筒9。 The [0052] The cartridge pushing 9 further comprising a protective sleeve. 所述的保护套筒9由一粗筒901和一细筒902连接而成,粗筒901的内径大于或等于所述注射器的针筒外径,所述筒体I后部的外壁上设有一圈凸缘104。 An outer wall of said protective sleeve 9 is connected by a coarse and a fine cylindrical tube 901 from 902, the inner diameter of the barrel of crude 901 greater than or equal to the outer diameter of the syringe barrel, the barrel is provided with a rear I ring flange 104. 细筒902的内径与筒体I的外径适配,细筒902的内壁上设有一圈能够与所述的凸缘104卡合的凹槽903。 Small of inner diameter of the outer diameter of the barrel I adapter 902, the inner wall of the narrow cylindrical component 902 provided with a ring flange 104 engageable with recess 903 of the card. 组装时,保护套筒9套接于筒体I的后端,通过凹槽903与凸缘104之间的卡合而固定,并使粗筒901包围着所述筒体I和所述支撑件3之间的卡合部位。 In assembly, the rear end of the protective sleeve 9 is sleeved on the cylinder I, is fixed by flanges between the grooves 903 and 104 engaged and the crude barrel 901 surrounding the cylindrical member and the support I 3 the engagement portion between.

[0053] 根据本实施例的一变型,如图4、5和8所示,所述支撑件3只设置有一个开口302,该开口302后沿的筒壁上设有一根沿筒状体的轴向向前延伸的弹性条6。 [0053] According to a variant embodiment of the present embodiment, as shown in Figures 4, 5 and 8, the support member 3 is provided with an opening 302, the opening 302 in the cylinder wall is provided along a cylindrical body the elastic strip 6 extends axially forwardly. 所述弹性条6外壁上设有一个第一凸块601,该第一凸块`601为半球形、三角形或顶端面为斜面的其他形状。 The outer wall of the elastic strip 6 is provided with a first bump 601, the first protrusion 601 'hemispherical, triangular, or other shapes to the top surface of the inclined surface. 所述筒体I的筒壁在与所述第一凸块601适配的位置上开有窗口101。 The cylindrical body of the cylindrical wall I in block 601 the position of the first projection adapted on the window 101 is opened. 组装时,第一凸块601支承在窗口101的后沿上,并凸出于窗口101之外,从而使所述的支撑件3可脱开地卡接在筒体I内。 In assembly, the first projection 601 is supported on the trailing edge of the window 101, and protrudes outside the window 101, such that the support member 3 can be releasably locked to the inner barrel I.

[0054] 根据本实施例的另一变型,如图6所示,将所述的开口302和窗口101设置为均为相对的两个,每一开口302中均设有一根向前延伸的弹性条6,该弹性条6上设置有第一凸块601和第二凸块602,其中,所述第一凸块601和第二凸块602的形状、相对位置以及组装位置与上述描述相同。 [0054] According to a further variant of the embodiment shown in Figure 6, the window openings 302 and 101 are provided to two opposed, each opening 302 has a forwardly extending resilient Article 6, the resilient strip 601 is provided with a first bump and a second bump 602 6, wherein the first bump 601 and a second convex shape relative position and the assembly position of the block 602 is the same as that described above.

[0055] 实施例2: [0055] Example 2:

[0056] 图2、3、8、10、11和16示出本发明的筒式推杆的实施例2。 [0056] FIGS. 2,3,8,10,11 and 16 show the push rod cartridge according to the present invention Example 2. 该实施例和实施例1的主要区别在于,所述支撑件3为一个前端封闭的筒状体,所述针头回缩触发器承托在所述支撑件3的前端面上。 Example 1 The main difference between this embodiment and the embodiment in that the front end of the support member 3 is a cylindrical closed body, said needle retracted trigger supporting the front face of the support member 3. 一底座301以粘接、焊接、铆钉连接、螺纹连接等方式连接在所述支撑件3的后端上。 A base 301 to bonding, welding, riveting, threaded connection or the like connected to the rear end of the support member 3.

[0057] 实施例3:[0058] 图3、10、14和16示出本发明的筒式推杆的实施例3。 [0057] Example 3: [0058] FIG. 3,10,14 and 16 show an embodiment of the present invention, cartridge plunger 3. 该实施例和前述实施例的主要区别在于,所述的支撑件3包括一个底座301、两根弹性条6和一根“T”型支撑条303。 The main difference between this embodiment and the preceding embodiment in that the support member 3 includes a base 301, two resilient strip 6 and a "T" shaped support bar 303. “T”型支撑条303的前端面呈“ + ”型、“X”型、“又”型或圆面型。 "T" type-section distal end 303 of support bar "+" type, "X-," type "and" type or a round face. 所述支撑条303的前端面支承所述针头回缩触发器。 The support bar 303 supporting a front end surface of the needle retracted trigger. 弹性条6和支撑条303均设置在底座301的前端面上,并沿筒体I的轴向向前延伸。 The elastic strip 6 and the support bar 303 are provided on the front end surface of the base 301 and extend forwardly along the axial direction of the barrel I. 两根弹性条6的外壁上各设有一个第一凸块601和第二凸块602,其中,所述第一凸块601和第二凸块602的形状、相对位置以及组装位置与实施例1相同。 6 two resilient strips each provided with an outer wall of a first bump 601 and a second protrusion 602, wherein the first bump 601 and a second convex shape relative position and the assembly position of the block 602 Example the same 1.

[0059] 根据本实施例的一变型,可以在弹性条6上仅设置第一凸块601,该第一凸块601为半球形、三角形或顶端面为斜面的其他形状。 [0059] According to a variant of the embodiment according to the present embodiment, the first bumps 601 may be provided only on the elastic strip 6, the first protrusion 601 is a hemispherical, triangular, or other shapes to the top surface of the inclined surface. 组装时,第一凸块601支承在窗口101的后沿上,并凸出于窗口101外,从而使支撑件3可脱开地卡接在筒体I内。 In assembly, the first projection 601 is supported on the trailing edge of the window 101, and 101 protrude from the window, so that the supporting member 3 can be releasably locked to the inner barrel I.

[0060] 实施例4: [0060] Example 4:

[0061] 图3、5、8、12、13和16示出本发明的筒式推杆的实施例4。 [0061] FIGS. 3,5,8,12,13 and 16 show the push rod cartridge according to the present invention Example 4. 该实施例和前述实施例的主要区别在于, 所述支撑件3由一个前筒和一个后筒套接而成,所述前筒的后端与所述后筒的前端分别设有相互适配的套接结构。 The main difference between this embodiment and the preceding embodiment in that the support member 3 by the front end and rear end of said rear barrel a front barrel and a rear barrel Taojie, said front cylinder is provided respectively interfitting the socket structure. 所述开口302设在所述后筒的与所述前筒套接部位后方的筒壁上。 The opening 302 provided in the rear wall of the front barrel portion of the cylindrical socket of the rear cylinder.

[0062] 所述后筒前端的与所述前筒套接的部位的外径小于后筒的其他部分的外径,并与所述前筒的内径适配,所述后筒前端的与所述前筒套接的部位上设有一个定位块305。 [0062] The outer diameter of the other portions of the outer diameter of the front cylindrical portion of the socket is smaller than the cylinder after the front end of the rear barrel, and adapted to the inner diameter of said front barrel, and the front end of the rear barrel said front portion is provided with a cylindrical positioning block 305 of the socket. 所述前筒后端的与所述后筒套接的部位的筒壁上设有一个与所述定位块305适配的定位槽或定位孔304。 The tube wall and the rear portion of the cylindrical socket is provided with a rear end of the front cylinder and the positioning block 305 is adapted positioning groove or positioning holes 304. 所述支撑条3上设有一个第一凸块601和第二凸块602,其中,所述第一凸块601和第二凸块602的形状、相对位置以及组装位置与实施例1相同。 The support bar 601 is provided with a first bump 602 and a second bump 3, wherein the first bump 601 and a shape, relative position and the assembly position and the second bump 602 in Example 1 of the same.

[0063] 实施例5: [0063] Example 5:

[0064] 该实施例和前述实施例的主要区别在于,采用图15所示的支撑件。 [0064] The main difference between this embodiment and the foregoing embodiments in that Example, using the support member 15 shown in FIG.

[0065] 实施例6: [0065] Example 6:

[0066] 该实施例和前述实施例的主要区别在于,用一针头承托件取代所述的针头回缩触发器,所述筒体I在套装密封胶垫5后露出一端部平齐的管状前端。 [0066] The main difference between this embodiment and the preceding embodiment in that Example, a needle supporting member with said needle retracted trigger substituted, an end portion of the cylindrical body flush I exposing a tubular package after sealing pad 5 front end. 根据本实施例的另一变型,所述管状前端的端部具有纵向齿状凸起。 According to another variant of the embodiment according to the present embodiment, the tubular distal end portion having a longitudinal serrations.

[0067] 本发明还提供一种包含上述改进的筒式推杆的回缩式安全注射器,该注射器可以采用上述任一种筒式推杆及其变型。 [0067] The present invention further provides a retractable safety syringe comprising the above-described improved cartridge plunger, the syringe barrel may be employed any of the above ram and variations.

[0068] 本发明还提供这样一种回缩式安全注射器,即除了采用上述任一种筒式推杆及其变型之外,还对注射器的其他部分进行了创新。 [0068] The present invention further provides a retracting safety syringes, i.e. plunger barrel except that any of the above and variations thereof, but also other parts of the syringe were innovation. 下面通过以下示例性实施例对该注射器进行说明。 The syringe will be described below by the following exemplary embodiments.

[0069] 实施例1: [0069] Example 1:

[0070] 图17示出本发明的注射器的实施例1。 [0070] FIG. 17 shows an embodiment of the syringe of the present invention. 所述注射器包括针筒17、固定有针头的针座18、针座套筒19、弹簧20、0型密封圈21和推杆,其中,所述针筒17在其前端形成一向针筒17的轴线方向收缩的肩部,再从所述肩部向前延伸出一个套管1701。 The syringe comprises a barrel 17, a needle hub fixed to the needle 18, the needle holder sleeve 19, spring 20, 0-ring 21 and the push rod, wherein said syringe barrel 17 has been formed at the front end 17 of contraction in the axial direction of the shoulder portion, and then extends forwardly from the shoulder 1701 a cannula. 套管1701在与所述肩部相连处的内壁上设有凸缘1702,套管1701的外壁上设有卡合、插接或螺纹连接结构1703。 Sleeve 1701 is provided on an inner wall connected to said shoulder portion of the flange 1702, the outer wall of the sleeve 1701 is provided with engagement, the plug or screw connection structure 1703. 所述针座18为一管状体,中间有一贯通孔,针头固定在针座18的贯通孔中,针座18的后端设有一喇叭形底座,针座18安装在套管1701内。 The hub 18 is a tubular body having a center through-hole, the through hole is fixed to the needle hub 18, the rear end of the needle hub 18 is provided with a flared base, the hub 18 is mounted within the sleeve 1701. 所述0型密封圈21套置在针座18的喇叭形底座的窄部上,并与套管1701内壁上的凸缘1702配合,使针座18可脱开地固定安装在套管1701内。 The 0-ring 21 is sleeved on the narrow portion of the flared base of the needle hub 18, and mating with the flange 1702 on the inner wall of the cannula 1701 so that the needle hub 18 may be releasably secured within the sleeve 1701 mounted . 所述弹簧20套置在针座18上,其后端支承于针座18的喇叭形底座上。 The spring 20 is sleeved on the needle hub 18, which is supported on the rear end of the base hub 18 of the horn. 所述针座套筒19具有一向后开口的空腔,其内径与套管1701的外径适配,针座套筒19的内壁上设有能够与套管1701外壁上的卡合、插接或螺纹结构1703配合的卡合、插接或螺纹结构1901,针座套筒19的闭合前端设有一针孔,当针座套筒19卡接、插接或螺纹连接在已安装有针座18的套管1701上时,针头从所述针孔中伸出,针座套筒19的闭合前端顶压着弹簧20的前端,并将弹簧20预压紧在该闭合前端与针座18的喇叭形底座之间。 The hub sleeve 19 has a rearwardly opening cavity, which inner and outer diameters of the adapter sleeve 1701, the needle hub is provided on the inner wall of the sleeve 19 can be engaged with the outer wall of the sleeve 1701 inserted or screw structure 1703 mating engagement, the plug or screw structure 1901, the closed front end of the needle holder sleeve 19 is provided with a pinhole, the needle hub when the sleeve 19 snapped, plugged or screwed with a hub 18 installed when the sleeve 1701, a needle extending from the needle hole, the closed front end of the needle hub spring 20 pressing against the distal end of the sleeve 19 and the horn 20 is pressed against the spring pre-closed distal end 18 of needle hub formed between the base. 所述筒式推杆装在针筒17内,当筒式推杆被推至针筒17的筒腔尽头时,筒式推杆的管状前端推动O型密封圈21进行整体或局部位移,从而松脱针座18与套管1701之间的固定关系,同时,针筒17的后端松脱所述筒式推杆中支撑件3与筒体I的卡接关系,并释放支撑件3。 The push rod is mounted within the syringe cartridge 17, the cartridge when the plunger is pushed to the end of the syringe barrel chamber 17, the front end of the tubular cartridge plunger pushes the O-ring 21 for a total or partial displacement, whereby releasably fixed relationship between the needle hub 18 and the sleeve 1701, while the rear end of the barrel 17 and release the support member 3 in the cylindrical body I snap relationship of the cartridge plunger and releases the support member 3.

[0071] 实施例2: [0071] Example 2:

[0072] 图18和19示出本发明的注射器的实施例2。 [0072] FIGS. 18 and 19 show the syringe according to the present invention Example 2. 该实施例和实施例1的主要区别在于,所述针座套筒19包括一个第一套筒1902和一个第二套筒1903,第一套筒1902的前端闭合并设有针孔,第二套筒1903的后端内壁上设有凸缘1904,第二套筒1903与第一套筒1902通过螺纹连接、插接或卡接方式连接为一体,或者通过粘接或超声波焊接方式进行固定连接。 Example 1 The main difference between this embodiment and the embodiment in that the hub sleeve 19 comprises a first sleeve a second sleeve 1902 and 1903, the closed front end of the first sleeve 1902 and a pinhole, a second the rear end of the inner wall of the sleeve 1903 is provided with an upper flange 1904, a first sleeve a second sleeve 1903 and 1902 by a threaded connection, snap or plug integrally connected, or connected by an adhesive or fixed by ultrasonic welding . 所述0型密封圈21套置在针座18的喇叭形底座的窄部上,并与第二套筒1903后端内壁上的的凸缘1904配合,使针座18可脱开地固定安装在针座套筒19内。 The 0-ring 21 is sleeved on the narrow portion of the flared base of the needle hub 18, and mating with the flange 1904 on the rear end wall of the second sleeve 1903, so that the needle hub 18 may be releasably secured to install sleeve 19 in the hub. 所述弹簧20套置在针座18上,其后端支承于针座18的喇叭形底座上。 The spring 20 is sleeved on the needle hub 18, which is supported on the rear end of the base hub 18 of the horn. 针座18安装在针座套筒19内,针头从第一套筒1902前端的针孔中伸出,第一套筒1902的闭合前端顶压着弹簧20的前端,并将弹簧20预压紧在该闭合前端与针座18的喇叭形底座之间。 Hub 18 is mounted on the hub sleeve 19, the needle 1902 protrudes from the needle hole in the front end of the first sleeve, the first sleeve distal end pressing against the closed distal end 1902 of the spring 20 and the compression spring 20 pre- between the closure base flared distal end 18 of the needle hub. 针座套筒19与针筒17的套管1701通过螺纹连接、插接或卡接方式可脱开地连接。 Hub sleeve 19 screwed to the barrel through the cannula 170 117, the plug or snap mode can be detachably connected.

[0073] 所述的第一套筒1902前端的针孔具有向内的喇叭形结构,所述针座18的前部也设有与所述喇叭形结构形状相配的锥形结构,组装后,所述针孔的喇叭形结构通过与针座18前部的锥形结构相互配合而固定针座18。 The leading end of the first sleeve 1902 pinhole [0073] The structure having inwardly flared front portion of the hub 18 is also provided with a conical flared shape of the structure and the mating structure after assembly, the pinhole flared structure 18 fixed to the hub structure by cooperating with the tapered portion 18 of the front hub.

[0074] 虽然以上仅仅描述了一些示例性的实施例,但本领域的技术人员将容易认识到的是,在不从本质上脱离本发明的新颖的技术内容和优点的情况下,上述示例性实施例可以有多种变型。 [0074] Although the above merely describes some exemplary embodiments, those skilled in the art will readily be appreciated that, without departing from the present invention essentially novel techniques and advantages of the exemplary Example embodiments may have various modifications. 因此,所有这样的变型都应包括在随后的本发明权利要求所限定的范围内。 Accordingly, all such modifications are intended to be included within the following claims of the invention as defined in the scope.

Claims (20)

  1. 1.一种改进的用于针头回缩式安全注射器的筒式推杆,包括筒体(I)、针头回缩触发器和支撑件(3),所述筒体(I)头部套有密封胶垫(5),其特征在于,所述针头回缩触发器设在筒体(I)的筒腔的前端;所述支撑件(3)设置在所述筒体(I)内,其前端支承所述针头回缩触发器;所述筒体(I)和所述支撑件(3)上设有相互适配的卡合结构,组装时,支撑件(3)可脱开地卡接在筒体(I)内;所述支撑件(3)在脱开与筒体(I)的卡接后,在针头回缩力的作用下与所述针头回缩触发器一起向后位移,使得所述针头回缩至筒体(I)或针座套筒(19)内,且所述支撑件(3)不接纳所述针头回缩触发器和所述针头。 1. An improved barrel for needle-retracting safety syringe plunger, comprising a tubular body (I), a needle retracted trigger and a supporting member (3), the cylinder (I) has a head cover seal pad (5), characterized in that said needle retracted trigger is provided at the front end of the cylinder barrel chamber (I) of; the support member (3) disposed within the cylinder (I), which the front end of the needle bearing retraction trigger; said tubular body (I) and the support member is provided with mutually adapted engaging structure (3), in assembly, the support member (3) can be releasably snap in the cylinder (I); the support member (3), after disengagement with the cylinder (I) is snapped, under the action of a needle retraction force to the needle retracted trigger displaced rearwardly together, such that the needle retracted into the cylinder (I) or a hub sleeve (19), and the support member (3) does not receive said needle retracted trigger and said needle.
  2. 2.如权利要求1所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述支撑件(3)为ー个前端封闭的筒状体,所述针头回缩触发器承托在所述支撑件(3)的前端面上。 2. A cartridge for a needle-retracting safety syringe according to claim 1, wherein the push rod, characterized in that the support member (3) is closed ー front-end cylindrical body, said needle retracted trigger is supporting front face of the support member (3).
  3. 3.如权利要求1所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,还包括一承托片(4),所述支撑件(3)为ー个前端开ロ的筒状体,该筒状体(3)的前端支承所述承托片(4),所述针头回缩触发器承托在所述承托片(4)上。 3. The cartridge push rod for needle-retracting safety syringe according to claim 1, characterized by further comprising a supporting plate (4), said support member (3) is a front-end open ro ーthe cylindrical body supports the front end of the cylindrical body (3) of said support sheet (4), supporting said needle retracted trigger on said support sheet (4).
  4. 4.如权利要求2或3所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述针头回缩触发器为一前部封闭的推柱(2),组装后,推柱(2)的前端突出于筒体(I)前端的筒腔开口和密封胶垫(5)之外,且突出部分呈端部平齐的管状结构,或呈端部具有纵向齿状凸起的管状结构。 4. The cartridge for a needle-retracting safety syringe of claim 2 or claim 3, wherein the push rod, wherein said needle retracted trigger is a pushing post closed front portion (2), the assembly , push the front end of the column (2) projecting outside the cylindrical body (I) and the front end of a cylindrical cavity opening seal pad (5), and the tubular projecting portion flush with the ends of the structure, or in an end portion having a longitudinal toothed raised tubular structure.
  5. 5.如权利要求4所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述支撑件(3)后部的筒壁上开有至少ー个开ロ(302),每ー开ロ(302)后沿的筒壁上设有ー根沿筒状体的轴向向前延伸的弹性条(6),所述弹性条(6)外壁上设有ー个第一凸块(601),所述第一凸块(601)为半球形、三角形或顶端面为斜面的其他形状;所述筒体(I)的筒壁在与所述第一凸块(601)适配的位置上开有窗ロ(101);组装时,第一凸块(601)支承在窗ロ(101)的后沿上,并凸出于窗ロ(101)之外,从而使所述的支撑件(3)可脱开地卡接在筒体(I)内。 5. The cartridge as claimed in claim for the needle-retracting safety syringe ram of claim 4, characterized in that the cylindrical wall of said support member (3) has a rear opening at least one opening ー ro (302) each open ro ー rear cylinder wall (302) along an elastic strip (6) along the axial root ー cylindrical body extending forwardly, the elastic strip (6) is provided with an outer wall of a first ーbumps (601), said first bump (601) is hemispherical, triangular, or other shapes to the top surface of the inclined surface; said tubular body (I) with a cylindrical wall of said first bump (601) ro window is opened (101) adapted on position; assembly, the first bump (601) mounted on the window ro (101) of the trailing edge and projects outside the window ro (101), so that the said support member (3) releasably locked to the inner cylinder (I).
  6. 6.如权利要求5所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述的开ロ(302)和窗ロ(101)均为相对设置的两个,每ー开ロ(302)中均设有ー根弹性条(6),在姆根弹性条(6)的外壁上相同位置处均设有一个第一凸块(601)。 6. The cartridge push rod for needle-retracting safety syringe according to claim 5, wherein said ro opening (302) and the window ro (101) are two oppositely disposed, each ro ー opening (302) are each provided with ー of elastic strips (6), in the same position of the outer wall of Mu of elastic strips (6) are provided with a first bump (601).
  7. 7.如权利要求1所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述针头回缩触发器为一前部封闭的推柱(2),组装后,推柱(2)的前端突出于筒体(I)前端的筒腔开口和密封胶垫(5)之外,且突出部分呈端部平齐的管状结构,或呈端部具有纵向齿状凸起的管状结构;所述筒体(I)中后部的筒壁上设有两个相对的窗ロ(101);所述的支撑件(3)包括一个底座(301)、两根弹性条(6)和一根“T”型支撑条(303),“T”型支撑条(303)的前端面呈“ + ”型、“X”型、“入”型或圆面型,弹性条(6)和支撑条(303)均设置在底座(301)的前端面上,并沿筒体(I)的轴向向前延伸,两根弹性条出)的外壁上各设有ー个第ー凸块¢01),第一凸块¢01)为半球形、三角形或顶端面为斜面的其他形状;所述支撑条(303)的前端面支承所述针头回缩触发器;组装时,第一凸块(601)支承在窗ロ(101)的后 7. The cartridge for needle-retracting safety syringe according to claim 1, wherein the push rod, wherein said needle retracted trigger is a pushing post closed front portion (2), is assembled, push outside the side of the stem (2) protruding from the cylindrical body (I) and the front end of a cylindrical cavity opening seal pad (5), and the tubular projecting portion flush with the ends of the structure, or in an end portion having a longitudinal serrations tubular structure; cylinder wall (I), the rear portion of the barrel is provided with two opposed windows ro (101); said support member (3) comprises a base (301), two resilient strip ( 6) and a "T" shaped supporting bar (303), the "T" support bars (303) of the distal end-section "+" type, "X-" type, "the" type or a round face, the elastic strip ( an outer wall 6) and the support bar (303) are provided on the front end surface of the base (301) and axially forwardly extending tubular body (I), the two elastic strips shown) each provided with a first ー ー¢ bumps 01), the first bump 01 ¢) hemispherical, triangular, or other shapes to the top surface of the inclined surface; supporting surface of the distal end of the support bar (303) of said needle retracted trigger; when assembled, the first a projection (601) supported in the rear window ro (101) 上,并凸出于窗ロ(101)タト,从而使支撑件(3)可脱开地卡接在筒体(I)内。 Upper and protruding from the window ro (101) Suites ta, so that the support member (3) releasably locked to the inner cylinder (I).
  8. 8.如权利要求6所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述筒体⑴后部的内壁上设有ー圈凸起的止退环,以使所述支撑件⑶和所述推柱⑵向后位移至使所述针头回缩至筒体(I)或针座套筒(19)内后被再次卡阻在所述的止退环上。 8. The cartridge push rod for needle-retracting safety syringe according to claim 6, wherein said rear tubular body is provided on the inner wall ⑴ retaining ring ー ring projection, so that said support member and said push pin ⑵ ⑶ rearwardly displaced to the cylinder to retract the needle (I) or a hub sleeve (19) again after the jamming in of the retaining ring.
  9. 9.如权利要求6所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述的弹性条(6)的外壁上还设有ー个第二凸块¢02),第二凸块(602)设在所述第一凸块(601)的后方,第一凸块(601)的后端面与第二凸块(602)的后端面之间的距离,等于或大于所述支撑件⑶和所述推柱⑵为了使针头能够回缩至筒体⑴或针座套筒(19)内所需要的向后位移距离,第二凸块(602)的凸起高度小于或等于第一凸块(601)的凸起高度,组装吋,第一凸块(601)和第二凸块(602)安装在所述的窗ロ(101)中并凸出于窗ロ(101)之外,第二凸块(602)支承在所述窗ロ(101)的后沿上,从而使支撑件(3)可脱开地卡接在筒体(I)内。 9. The cartridge for needle-retracting safety syringe according to claim 6, wherein the push rod, characterized in that the outer wall of the resilient strip (6) is further provided with the second bumps ー ¢ 02) , the second bump (602) disposed behind said first projection (601), the distance between the first bump (601) and the rear end surface of the second bump (602) of the rear end, is equal to or is greater than the support member and the push pin ⑶ ⑵ retractable needle in order to enable the barrel or hub ⑴ rearward displacement distance in the sleeve (19) required, the second bump (602) of the projection height is less than or equal to the first bump (601) of the bump height, inches assembly, the first bump (601) and the window ro (101) a second bump (602) mounted in said window and is projecting to the ro outside (101), the second bump (602) supported on said window ro (101) trailing edge, so that the support member (3) releasably locked to the inner cylinder (I).
  10. 10.如权利要求4所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述筒体(I)中后部的筒壁上开有至少ー个窗ロ(101);所述支撑件(3)中后部的筒壁在与每个窗ロ(101)适配的位置上均开有开ロ(302),开ロ(302)的前沿的筒壁上设有一条沿该筒状体的轴向向后延伸的弹性条出),在弹性条出)的外壁上设有第一凸块¢01),第一凸块(601)为半球形、三角形或顶端面为斜面的其他形状,组装时,第一凸块¢01)支承在窗ロ(101)的后沿上,并凸出于窗ロ(101)之外,从而使支撑件(3)可脱开地卡接在筒体(I)内。 10. A cartridge for a needle-retracting safety syringe as claimed in claim 4, wherein the push rod, characterized in that said tubular body (I) in the cylinder wall of the rear opening at least one window ro ー (101 ); tubular wall (3) in the rear of the support member and adapted ro each window (101) opened position to open both ro (302), ro opening (302) of the leading edge of the cylinder wall is provided there is a flexible strip that extends axially rearward out of the cylindrical body), an elastic strip) is provided with an outer wall of the first bump 01 ¢), a first bump (601) is hemispherical, triangular, or top bevel surface other shapes, in assembly, the first bump ¢ 01) supported on the rear edge of the window ro (101), and protruding from the window ro (101) outside, so that the support member (3) can be disengageably connected to the cylinder (I).
  11. 11.如权利要求10所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述筒体(I)的筒壁上设置的窗ロ(101)和支撑件(3)的筒壁上设置的开ロ(302)均为对称的两个,所述的弹性条(6)及其上设置的第一凸块¢01)也分别为对称的两组;在弹性条(6)上还设有位于第一凸块(601)后方的第二凸块¢02),所述第二凸块(602)的后端面与第一凸块(601)的后端面之间的距离,等于或大于支撑件(3)和所述推柱(2)为了使针头能够回缩至筒体(I)或针座套筒(19)内所需要的向后位移距离,第二凸块(602)的凸起高度等于或小于第一凸块(601)的凸起高度,组装时,第一凸块(601)和第二凸块(602)均安装在窗ロ(101)中并凸出于窗ロ(101)之外,且第二凸块(602)支承在窗ロ(101)的后沿上,从而使支撑件(3)可脱开地卡接在筒体(I)内。 11. A cartridge for a needle-retracting safety syringe according to claim 10, wherein the push rod, characterized in that the window ro (101) and the support member (3 of the tubular body (I) of the tube wall provided ) a cylindrical opening provided on the wall ro (302) are two symmetrical, said resilient strip (6) and provided on the first bump 01 ¢) are also symmetrical groups; elastic strip (6) it is also provided with a second protrusion ¢ located behind a first projection (601) 02), between the second bump (602) and the rear end surface of the first bump (601) of the rear end distance is equal to or greater than the support member (3) and said pushing post (2) in order to be able to retract the needle into the barrel (I) or the hub distance in the rearward displacement of the sleeve (19) required, the second bumps (602) is less than or equal to the height of projection of the first projection (601) of the projection height of the assembly, the first bump (601) and the second bumps (602) are mounted ro window (101) ro and protrude window (101) outside, and the second bump (602) mounted on the window ro (101) trailing edge, so that the support member (3) can be releasably locked to the barrel ( I) inside.
  12. 12.如权利要求5所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述支撑件(3)由一个前筒和一个后筒套接而成;所述前筒的后端与所述后筒的前端分别设有相互适配的套接结构;所述开ロ(302)设在所述后筒的与所述前筒套接部位后方的筒壁上。 12. A cartridge for a needle-retracting safety syringe as claimed in claim 5, wherein the push rod, characterized in that the support member (3) consists of a front barrel and a rear barrel Taojie; the front the rear end of the barrel with the front end of the rear barrel are provided with a socket structure adapted to each other; ro the opening behind the front cylinder and the cylinder wall portion of the cylindrical socket (302) provided at the rear.
  13. 13.如权利要求12所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,所述后筒前端的与所述前筒套接的部位的外径小于后筒的其他部分的外径,并与所述前筒的内径适配,所述后筒前端的与所述前筒套接的部位上设有ー个定位块(305);所述前筒后端的与所述后筒套接的部位的筒壁上设有ー个与所述定位块(305)适配的定位槽或定位孔(304);所述第一凸块(601)后方还设有ー个第二凸块¢02),且第一凸块¢01)的凸起高度大于或等于第二凸块(602)的凸起高度,第一凸块(601)的后端面与第二凸块(602)的后端面之间的距离,大于或等于支撑件(3)和所述推柱(2)为了使针头能够回缩至筒体(I)或针座套筒(19)内所需要的向后位移距离;组装时,第一凸块(601)和第二凸块(602)均安装在所述的窗ロ(101)中并凸出于窗ロ(101)之外,且第二凸块(602)支承在窗ロ(101)的后沿上,从而使 Other cartridge 13 for needle-retracting safety syringe as claimed in claim 12, wherein the push rod, wherein an outer diameter of said front cylinder with said rear portion of tube distal end of the socket is smaller than the rear barrel an outer diameter portion, and adapted to the inner diameter of said front barrel, provided ー positioning blocks (305) on said front cylinder with said rear portion of socket tube distal end; and said front and rear end of the barrel the wall of said rear barrel cylindrical portion of the socket is provided with a ー the positioning block (305) adapted positioning holes or the positioning grooves (304); the first bump (601) is also provided with a rear one ー¢ second bump 02), and the first bump 01 ¢) is greater than or equal to the height of the protrusion of the second bump (602) the height of projections, a first projection (601) of the rear end surface of the second protrusion the distance between (602) of the rear end surface, is greater than or equal to the support member (3) and said pushing post (2) in order to be able to retract the needle into the barrel (I) or a hub sleeve (19) of the desired rearward displacement distance; ro window assembly, the first bump (601) and the second bumps (602) are mounted in one of (101) and protruding from the window ro (101), the first and two projections (602) mounted on the window ro (101) trailing edge, so that 述的支撑件(3)可脱开地卡接在筒体(I)内。 Said support member (3) releasably locked to the inner cylinder (I).
  14. 14.如权利要求11所述的用于针头回缩式安全注射器的筒式推杆,其特征在于,还包括一保护套筒(9),所述的保护套筒(9)由一粗筒(901)和ー细筒(902)连接而成;粗筒(901)的内径大于或等于所述注射器的针筒外径;所述筒体(I)后部的外壁上设有ー圈凸缘(104);细筒(902)的内径与筒体⑴的外径适配,细筒(902)的内壁上设有ー圈能够与所述的凸缘(104)卡合的凹槽(903),组装时,保护套筒(9)套接于筒体(I)的后端,通过凹槽(903)与凸缘(104)之间的卡合而固定,并使粗筒(901)包围着所述筒体(I)和所述支撑件(3)之间的卡合部位。 14. The cartridge push rod for needle-retracting safety syringe according to claim 11, characterized in that, further comprising a protective sleeve (9), said protective sleeve (9) consists of a thick cylinder (901) and a fine ー cylinder (902) connected to each other; an inner diameter of the barrel of crude (901) is greater than or equal to the outer diameter of the syringe barrel; the rear wall of the outer cylinder (I) is provided with a convex ring ーedge (104); thin cylinder (902) with an inner diameter adapted to the outer diameter of the cylindrical body ⑴ provided on the inner wall of the fine tube (902) ー ring groove engageable with said flange (104) ( 903), in assembly, the protective sleeve (9) is sleeved on the cylinder (I), a rear end, together with the engagement between the fixed flange (104) by a groove (903), and the crude cylinder (901 ) surrounding the tubular engaging portion between (I) and said support member (3).
  15. 15.如权利要求1、2或3所述的用于针头回缩式安全注射器的筒式推杆,其特征在干,用一针头承托件取代所述的针头回缩触发器,所述筒体(I)在套装密封胶垫(5)后露出一端部平齐或者端部具有纵向齿状凸起的管状前端。 15. A cartridge for a needle-retracting safety syringe of claim 1, 2 or claim 3 tappet, characterized in that dry, with a needle retracted trigger substituted supporting said needle member, said cylinder (I) after the sealing pad set (5) is flush with the exposed end portion or distal end of the tubular portion having a longitudinal serrations.
  16. 16.一种针头回缩可控式安全注射器,包括针筒(17)、固定有针头的针座(18)、针座套筒(19)、弹簧(20)、O型密封圈(21)和推杆,其特征在于,所述推杆采用如权利要求14所述的筒式推杆;所述针筒(17)在其前端形成一向针筒(17)的轴线方向收缩的肩部,再从所述肩部向前延伸出一个套管(1701),套管(1701)在与所述肩部相连处的内壁上设有凸缘(1702),套管(1701)的外壁上设有卡合、插接或螺纹连接结构(1703);所述针座(18)为ー管状体,中间有ー贯通孔,针头固定在针座(18)的贯通孔中,针座(18)的后端设有ー喇叭形底座,针座(18)安装在套管(1701)内;所述O型密封圈(21)套置在针座(18)的喇叭形底座的窄部上,并与套管(1701)内壁上的凸缘(1702)配合,使针座(18)可脱开地固定安装在套管(1701)内;所述弹簧(20)套置在针座(18)上,其后端支承于针座(18)的喇叭形底座上;所述针座套筒(19 16. A needle retraction controllable safety syringe, comprising a syringe (17), is fixed to the needle hub (18), the hub sleeve (19), a spring (20), O-ring (21) and the push rod, characterized in that the pusher using the cartridge plunger as claimed in claim 14; said barrel (17) has been formed in the syringe (17) in the axial direction at its front end a shoulder shrinkage, extending forwardly from the shoulder and then a cannula (1701), cannula (1701) is provided with a flange (1702), cannula (1701) of the outer wall is provided on the inner wall is connected at the shoulder engagement, the plug or screw connection structure (1703); the hub (18) of the tubular body ー, ー middle through hole, the through hole is fixed to the needle hub (18), a needle hub (18)ー flared rear end is provided with a base, the needle hub (18) mounted within the sleeve (1701); the O-ring (21) sleeved on the narrow portion of the needle hub (18) of the flared base, and a flange on the inner wall (1702) with the sleeve (1701), the needle holder (18) can be mounted releasably secured within the sleeve (1701); (20) sleeved on the spring hub (18 a), at its rear end in the hub (18) of the flared base; said hub sleeve (19 )具有一向后开ロ的空腔,其内径与套管(1701)的外径适配,针座套筒(19)的内壁上设有能够与套管(1701)外壁上的卡合、插接或螺纹结构(1703)配合的卡合、插接或螺纹结构(1901),针座套筒(19)的闭合前端设有ー针孔,当针座套筒(19)卡接、插接或螺纹连接在已安装有针座(18)的套管(1701)上吋,针头从所述针孔中伸出,针座套筒(19)的闭合前端顶压着弹簧(20)的前端,并将弹簧(20)预压紧在该闭合前端与针座(18)的喇叭形底座之间;所述筒式推杆装在针筒(17)内,当筒式推杆被推至针筒(17)的筒腔尽头时,筒式推杆的管状前端推动O型密封圈(21)进行整体或局部位移,从而松脱针座(18)与套管(1701)之间的`固定关系,同时,针筒(17)的后端松脱所述筒式推杆中支撑件(3)与筒体(I)的卡接关系,并释放支撑件(3)。 ) Having a rearwardly open cavity ro, an inner diameter of the sleeve (1701) adapted to the outer diameter, it can be provided with a cannula (1701) engage an outer wall of the needle hub on the inner wall of the sleeve (19), plug bonding or screw structure (1703) mating engagement, the plug or screw structure (1901), the hub sleeve (19) is provided with a closed distal ー pinhole, the needle hub when the sleeve (19) snap, plug the front end or threaded hub (18) of the sleeve has been installed on inch (1701), the needle extends from the needle hole, the needle hub sleeve (19) pressing against the closed front end of the spring (20) and a spring (20) pre-compressed between the closed front end of the needle hub (18) of the flared base; said cartridge within the syringe pusher means (17), when the cartridge is pushed to the push rod `when the barrel chamber between the end of the syringe (17), the front end of the tubular cartridge plunger pushes the O-ring (21) for whole or partial displacement, thereby releasing the needle holder (18) and the sleeve (1701) fixed relationship, while the rear end of the syringe (17) to release said cartridge pushrod supporting member (3) and the cylinder (I) in snap relation, and release the support member (3).
  17. 17.一种针头回缩可控式安全注射器,包括针筒(17)、固定有针头的针座(18)、针座套筒(19)、弹簧(20)、O型密封圈(21)和推杆,其特征在于,所述推杆采用如权利要求14所述的筒式推杆;所述针筒(17)在其前端形成一向针筒(17)的轴线方向收缩的肩部,再从所述肩部向前延伸出一个套管(1701);所述针座(18)为ー管状体,中间有ー贯通孔,针头固定在针座(18)的贯通孔中,针座(18)的后端设有ー喇叭形底座;所述针座套筒(19)包括ー个第一套筒(1902)和ー个第二套筒(1903),第一套筒(1902)的前端闭合并设有针孔,第ニ套筒(1903)的后端内壁上设有凸缘(1904),第二套筒(1903)与第一套筒(1902)通过螺纹连接、插接或卡接方式连接为一体,或者通过粘接或超声波焊接方式进行固定连接;所述O型密封圈(21)套置在针座(18)的喇叭形底座的窄部上,并与第二套筒(1903)后端内壁上的的凸缘(190 17. A needle retraction controllable safety syringe, comprising a syringe (17), is fixed to the needle hub (18), the hub sleeve (19), a spring (20), O-ring (21) and the push rod, characterized in that the pusher using the cartridge plunger as claimed in claim 14; said barrel (17) has been formed in the syringe (17) in the axial direction at its front end a shoulder shrinkage, extending forwardly from the shoulder and then a cannula (1701); the hub (18) of the tubular body ー, ー middle through hole, the through hole is fixed to the needle hub (18), a needle hub (18) is provided with a rear end ー flared base; said hub sleeve (19) comprises a first sleeve ー (1902) and ー second sleeve (1903), a first sleeve (1902) the front end is closed and has a pin hole, a flange (1904), a second sleeve (1903) and the first sleeve (1902) by screwing the rear end of the inner wall of the sleeve ni (1903), the plug snap or integrally connected, or connected by an adhesive or fixed by ultrasonic welding; the O-ring (21) sleeved on the narrow portion of the needle hub (18) of the flared base, and the second a sleeve (1903) of a flange (190 on the rear end of the inner wall 4)配合,使针座(18)可脱开地固定安装在针座套筒(19)内;所述弹簧(20)套置在针座(18)上,其后端支承于针座(18)的喇叭形底座上;针座(18)安装在针座套筒(19)内,针头从第一套筒(1902)前端的针孔中伸出,第一套筒(1902)的的闭合前端顶压着弹簧(20)的前端,并将弹簧(20)预压紧在该闭合前端与针座(18)的喇叭形底座之间;针座套筒(19)与针筒(17)的套管(1701)通过螺纹连接、插接或卡接方式可脱开地连接;所述筒式推杆装在针筒(17)内,当筒式推杆被推至针筒(17)的筒腔尽头时,筒式推杆上的管状前端推动O型密封圈(21)进行整体或局部位移,从而松脱针座(18)与针座套筒(19)之间的固定关系,同时,针筒(17)的后端松脱筒式推杆中支撑件(3)与筒体⑴的卡接关系,并释放支撑件(3)。 4) with the needle hub (18) releasably secured to the sleeve mounted on the hub (19); (20) the spring sleeved on the needle seat (18) at its rear end to a needle hub ( 18) of the flared base; needle hub (18) mounted on the hub sleeve (19), the needle extends from the needle hole of the first sleeve (1902) in the front end of the first sleeve (1902) is a spring pressing against the closed distal end (20) of the front end, and a spring (20) pre-compressed between the closed front end of the needle hub (18) of the flared base; needle hub sleeve (19) with the barrel (17 ) of the sleeve (1701) by a threaded connection, snap or plug releasably coupled manner; the cartridge within the syringe pusher means (17), when the cartridge is pushed to the syringe plunger (17 fixed relationship between) when the barrel chamber end, the distal end of the tubular push O-ring (21) on a cartridge pusher whole or partial displacement, thereby releasing the needle holder (18) and the hub sleeve (19) Meanwhile, the rear end of the syringe (17) of the support member release pusher drum (3) relation with a barrel ⑴ card and release the support member (3).
  18. 18.如权利要求17所述的针头回缩可控式安全注射器,其特征在于,所述支撑件(3)后部的筒壁上开有至少ー个开ロ(302),每ー开ロ(302)后沿的筒壁上设有ー根沿筒状体的轴向向前延伸的弹性条出),所述弹性条(6)外壁上设有ー个第一凸块¢01),所述第一凸块(601)为半球形、三角形或顶端面为斜面的其他形状;所述筒体(I)的筒壁在与所述第一凸块(601)适配的位置上开有窗ロ(101);组装时,第一凸块(601)支承在窗ロ(101)的后沿上,并凸出于窗ロ(101)之外,从而使所述的支撑件(3)可脱开地卡接在筒体(I)内; 所述支撑件(3)由一个前筒和一个后筒套接而成;所述前筒的后端与所述后筒的前端分别设有相互适配的套接结构;所述开ロ(302)设在所述后筒的与所述前筒套接部位后方的筒壁上; 所述后筒前端的与所述前筒套接的部位的外径小于后筒的其他部分的外径,并与所述前 18. The needle according to claim 17 retracted controllable safety syringe, characterized in that the support cylinder wall element (3) has a rear opening at least one opening ー ro (302), each open ro ーafter the (302) along the cylinder wall is provided with an elastic strip ー root extending forwardly along the axial direction of the cylindrical body), the elastic strip (6) is provided with an outer wall of a first bump ー ¢ 01), the first bump (601) is hemispherical, triangular, or other shapes to the top surface of the inclined surface; said tubular body (I) with a cylindrical wall open at the first bump (601) adapted to position ro with windows (101); upon assembly, the first bump (601) mounted on the window ro (101) of the trailing edge and projects outside the window ro (101), such that said support member (3 ) releasably locked to the inner cylinder (the I); the support member (3) consists of a front barrel and a rear barrel Taojie; rear end of the rear barrel front end of the front cylinder, respectively, with each socket structure adapted; ro said opening (302) provided in the tube wall of the front cylinder and the rear socket portion of said rear barrel; after the front end of the cylinder barrel and the front sleeve an outer diameter smaller than the outer diameter of the contact portion of the other tubular portion, and with the front 的内径适配,所述后筒前端的与所述前筒套接的部位上设有ー个定位块(305);所述前筒后端的与所述后筒套接的部位的筒壁上设有ー个与所述定位块(305)适配的定位槽或定位孔(304);所述第一凸块¢01)后方还设有ー个第二凸块¢02),且第一凸块(601)的凸起高度大于或等于第二凸块(602)的凸起高度,第一凸块(601)的后端面与第二凸块(602)的后端面之间的距离,大于或等于支撑件(3)和所述推柱(2)为了使针头能够回缩至筒体(I)或针座套筒(19)内所需要的向后位移距离;组装时,第一凸块(601)和第二凸块(602)均安装在所述的窗ロ(101)中并凸出于窗ロ(101)之外,且第二凸块(602)支承在窗ロ(101)的后沿上,从而使所述的支撑件(3)可脱开地卡接在筒体(I)内; 所述的第一套筒(1902)前端的针孔具有向内的喇叭形结构,所述针座(18)的前部也设有与所述喇叭形结构形状相配的锥形结构 The inner diameter of the adapter is provided ー positioning blocks (305) on a portion of said front barrel telescoped front end of the rear cylinder; cylinder wall and the rear portion of the cylindrical socket of the rear end of front barrel is provided with the positioning ー a block (305) adapted positioning holes or the positioning grooves (304); the first bump ¢ 01) is also provided with a rear second bumps ー ¢ 02), and the first bumps (601) is equal to or greater than a second height of the protrusions bump (602) of the bump height, the distance between the first bump (601) and the rear end surface of the second bump (602) of the rear end face, greater than or equal to the support member (3) and said pushing post (2) in order to be able to retract the needle into the barrel (I) or a hub sleeve (19) within the rearward displacement distance required; when assembled, the first bumps (601) and a second window ro bumps (602) are mounted in one of (101) and protrude ro window (101) outside, and the second bump (602) is supported on the window ro ( 101) trailing edge, such that said support member (3) releasably locked to the inner cylinder (I); (1902) of the front end of said first sleeve having a pinhole inwardly horn shaped structure, the front portion of said needle seat (18) is also provided with the structural shape of the flared mating tapered structure ,组装后,所述针孔的喇叭形结构通过与针座(18)前部的锥形结构相互配合而固定针座(18)。 After assembly, the pinhole fixed by flared structure (18) structure of the front tapered portion cooperating with the needle hub the needle hub (18).
  19. 19.如权利要求17所述的针头回缩可控式安全注射器,其特征在于,所述支撑件(3)后部的筒壁上开有至少ー个开ロ(302),每ー开ロ(302)后沿的筒壁上设有ー根沿筒状体的轴向向前延伸的弹性条出),所述弹性条(6)外壁上设有ー个第一凸块¢01),所述第一凸块(601)为半球形、三角形或顶端面为斜面的其他形状;所述筒体(I)的筒壁在与所述第一凸块(601)适配的位置上开有窗ロ(101);组装时,第一凸块(601)支承在窗ロ(101)的后沿上,并凸出于窗ロ(101)之外,从而使所述的支撑件(3)可脱开地卡接在筒体(I)内; 所述的开ロ(302)和窗ロ(101)均为相对设置的两个,每ー开ロ(302)中均设有ー根弹性条(6),在姆根弹性条(6)的外壁上相同位置处均设有ー个第一凸块(601); 所述筒体(I)后部的内壁上设有ー圈凸起的止退环,以使所述支撑件(3)和所述推柱(2)向后位移至使所述针头回缩至筒体(I) 19. The needle according to claim 17 retracted controllable safety syringe, characterized in that the support cylinder wall element (3) has a rear opening at least one opening ー ro (302), each open ro ーafter the (302) along the cylinder wall is provided with an elastic strip ー root extending forwardly along the axial direction of the cylindrical body), the elastic strip (6) is provided with an outer wall of a first bump ー ¢ 01), the first bump (601) is hemispherical, triangular, or other shapes to the top surface of the inclined surface; said tubular body (I) with a cylindrical wall open at the first bump (601) adapted to position ro with windows (101); upon assembly, the first bump (601) mounted on the window ro (101) of the trailing edge and projects outside the window ro (101), such that said support member (3 ) releasably locked to the inner cylinder (the I); ro said opening (302) and the window ro (101) are two oppositely disposed, each ー ro opening (302) have a root ーan elastic strip (6), in the same position of the outer wall of Mu of elastic strips (6) are provided ー of first bumps (601); said tubular body (I) is provided on the inner wall of the rear portion of the ring projecting ーsince the retaining ring, so that the support member (3) and said pushing post (2) is displaced to rearward to retract the needle cylinder (I) 或针座套筒(19)内后被再次卡阻在所述的止退环上; 所述的第一套筒(1902)前端的针孔具有向内的喇叭形结构,所述针座(18)的前部也设有与所述喇叭形结构形状相配的锥形结构,组装后,所述针孔的喇叭形结构通过与针座(18)前部的锥形结构相互配合而固定针座(18)。 Hub or sleeve (19) again after the jamming in of the retaining ring; (1902) of the front end of said first sleeve having a pinhole structure flared inwardly, said needle hub ( 18) it is also provided with a conical front portion structure and shape of the flared mating structure after assembly, the pinhole horn structure by fixing pins (18) structure of the front tapered portion cooperating with the needle hub Block (18).
  20. 20.一种针头回缩可控式安全注射器,其特征在于,包括一个根据权利要求15所述的筒式推杆。 20. A needle retraction controllable safety injector, wherein the cartridge comprises a push rod according to claim 15. ` `
CN 200810111535 2008-06-05 2008-06-05 Improved barrel type push bar for needle whip-back type safety syringe and syringe thereof CN101318040B (en)

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CN101480511B (en) 2009-02-08 2011-10-05 浙江康康医疗器械有限公司 Disposable safety syringe with syringe needle capable of automatically retracting

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US5171300A (en) 1988-02-01 1992-12-15 Medtech Group, Inc. Disposable hypodermic syringe
US5997512A (en) 1998-03-04 1999-12-07 Shaw; Thomas J. Retractable dental syringe
CN2486160Y (en) 2001-04-13 2002-04-17 双鸽集团有限公司 Safety seld damage disposable aseptic syringe
CN1748807A (en) 2005-04-26 2006-03-22 刘文杰 Tubular push rod for needle retractable safety injector and needle retractable controllable safety injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5171300A (en) 1988-02-01 1992-12-15 Medtech Group, Inc. Disposable hypodermic syringe
US5997512A (en) 1998-03-04 1999-12-07 Shaw; Thomas J. Retractable dental syringe
CN2486160Y (en) 2001-04-13 2002-04-17 双鸽集团有限公司 Safety seld damage disposable aseptic syringe
CN1748807A (en) 2005-04-26 2006-03-22 刘文杰 Tubular push rod for needle retractable safety injector and needle retractable controllable safety injector

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