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CN100394991C - Retraction type safety syringe - Google Patents

Retraction type safety syringe Download PDF

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Publication number
CN100394991C
CN100394991C CN 200410085934 CN200410085934A CN100394991C CN 100394991 C CN100394991 C CN 100394991C CN 200410085934 CN200410085934 CN 200410085934 CN 200410085934 A CN200410085934 A CN 200410085934A CN 100394991 C CN100394991 C CN 100394991C
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CN
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retraction
type
safety
syringe
retraction type
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CN 200410085934
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Chinese (zh)
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CN1765427A (en )
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罗锦荣
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镱钛科技股份有限公司
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Abstract

本发明提供一种回缩式安全注射针筒,包含一外筒、一盖头套筒、一连接座、一推杆及一注射针,该外筒管体的前端与盖头套筒套合,盖头套筒的内腔与连接座相套合,且该连接座衔接注射针;该推杆装置于该外筒内腔,供抽取注射液或注射,并拉引该连接座。 The present invention provides a retractable safety syringe, comprising an outer tube, a lid sleeve connected to a housing, a plunger and an injection needle, the distal end of the outer barrel body and the lid sleeve is nested, lid sleeve lumen connector housing engaged with sleeve, and the adapter connected to the injection needle holder; the plunger to the outer cylinder chamber means for extracting injectable solutions, and pulling the connector holder. 该盖头套筒内壁设有双头螺纹,筒身的另端热融接合一密封环圈,该连接座由一凸出小管及一座身部构成,装设于该盖头套筒内,该座身部设有一与推杆卡扣的装置,供推杆拉引该连接座回缩进入该外筒内部。 The lid has a double threaded sleeve inner wall, the other end of the barrel engages a hot melt seal ring, the connection consists of a base and a projecting tubular body portion, the lid mounted to the inner sleeve, the base body It means a portion of the push rod is provided with a snap for pulling the pusher connector holder is retracted into the interior of the outer cylinder. 本发明使连接座连同注射针可以回缩进入外筒腔内,实现安全防护,还可确保注射液防漏的可靠度。 The present invention together with the connector holder can retract the needle into the outer cylindrical cavity, to achieve security, reliability injection also ensures a leakproof. 使盖头套筒、连接座自外筒前端塞入组合,可提高组装的方便性。 That the lid sleeve, inserted into the connector housing from the front end of the outer cylinder combination, can improve the ease of assembly.

Description

回縮式安全注射针筒 Retractable safety syringe

【技术领域】 TECHNICAL FIELD

本发明涉及一种回缩式安全注射针筒。 The present invention relates to a retractable safety syringe. 【背景技术】 【Background technique】

请参阅图l,传统的注射针筒主要是由一中空外筒、 一推杆及一注射针所组成,其中,该外筒的前端是一体连接一外圆周呈锥柱状且中心设有中空流道的凸出小管,当装置注射针时,用手捏持注射针的针座插于凸出小管,通过凸出小管外周圆的锥柱面与注射针的针座手压而接合;又该推杆轴向是装设于该外筒腔内,通过该推杆抽拉动作, 使注射液经由针管、针座、凸出小管而被抽吸至筒腔。 Referring to FIG. L, the conventional syringe is mainly composed of a hollow outer cylinder, a plunger and an injection needle, where the tip of the outer cylinder is integrally connected to an outer circumference of a cone shape and a center pillar provided with a hollow flow projecting tubular passage, when the needle means, Yong Shounie needle holder holding the needle inserted in tubular projections, are joined by projecting the outer circumference of the tubular tapered cylindrical injection needle and needle hub hand pressure; should the push rod is axially mounted to the outer cylinder chamber, through which the push rod pulling operation, the injection fluid through the needle, the needle hub, the projecting tube is drawn into the small cylinder chamber. 当注射液抽吸至预定的剂量后,可进行注射作业,或是套回针盖,用手松弛与凸出小管紧迫压合的注射针,将该注射针卸除,换装新的注射针,再进行注射作业。 When the injection pumped to a predetermined dose, the injection operation can be, or set the needle cover back, relaxation of the needle by hand and pressing nip tubular projection of the injection needle removed, fitted with new injection needle , then injection operations. 注射作业是通过该推杆推送动作,将注射液由外筒内腔经凸出小管、针座、针管而注入体内。 Injection operation is pushed through the push rod operation, the injection pipe projecting from the small outer cylinder chamber through the needle hub, the needle cannula into the body. 由于该注射针筒的注射针与凸出小管的接合,仅依赖用手给予压迫注射针使其套于凸出小管,在操作的实务中,容易因操作人员不确实的紧压动作而造成注射针在操作中意外脱落的危睑。 Since the injection needle of the syringe engages with the projecting tubules, depends only on the given hand compression sleeve so as to protrude the needle tubules, in practical operation, it is easy because the operator does not squeeze operation caused by injection risk of accidental removal of the needle in the eyelid operation.

为了防止操作人员该不确实的紧压动作而造成注射针在操作中脱落的意外,请参阅图2,是另一传统的注射针筒,主要是由--中空外筒、 一推杆及一注射针所组成,其中,该外筒的前端设有一螺管及一凸出小管,且该外筒、螺管及凸出小管为一体成型。 In order to prevent the operator does not squeeze action of accidental needle detached in operation, see FIG. 2, another conventional syringe, mainly by - an outer hollow cylinder, a plunger and a the composition of the injection needle, wherein the distal end of the outer cylinder is provided with a solenoid and a tubular projection, and the outer tube, spiral tube and projecting integrally formed tubules. 欲将注射针组装于针筒前端时,将注射针的针座内腔套入凸出小管,用手顺时针旋转该注射针,则针座腔体的凸缘受到该螺管螺纹的导引,即可紧密地套于该凸出小管,且通过该螺管螺纹的牙沟与该针座腔体凸缘的卡制,使注射针不会有意外脱落的情形发生。 When wishing injection needle assembly to the front end of the syringe, the injection needle into the needle holder projecting tubular sheath lumen, the needle is rotated clockwise by hand, the hub flange cavity is guided to the screw thread of the tube can closely to the projecting tubular sleeve and screwed through the threaded tube sulcus with the hub flange cavity card system, the injection needle will not accidentally fall off happens. 当进行注射针筒操作时, When the operation of the syringe,

通过抽拉该推杆后退,进行注射液的抽吸作业。 By pulling back the tappet, suction operation of the injection. 当注射液抽吸至预定的剂量后,可进行注射作业,或是套回针盖,用手反时针旋转该注射针,将该注射针卸除,换装新的注射针后,再进行注射作业。 When the injection pumped to a predetermined dose, the injection operation can be carried out, or set the needle cover back, counterclockwise rotation of the needle, the needle removed, fitted with new injection needle by hand, and then injection operation.

由于传统的注射针筒的外筒、凸出小管或螺管皆是形成一体,其注射针无安全回縮收纳的功能,为了解决这个问题,近年来遂发展出一种专用注射针的回縮式安全注射针筒,其主要是由一外筒组配一可往复移动的推杆所组成,且该外筒内腔于前端处直接接装一特殊制作的专用注射针,当注射完成并将该推杆向该注射针方向位移至行程终点时,通过该推杆前端与该专用注射针的构成,可使该推杆与该专用注射针卡接,此时,向后抽拉该推杆,即可引带该专用注射针位移进入该外筒内腔,如此一来,当注射作业完成后,该专用注射针可回縮进入该外筒内腔,而得以避免该注射针裸露于外部所形成的刺伤危害,但由于该专用注射针的回縮式安全注射针筒不具有更换注射针的功能,在操作实务中造成安全卫生和操作不便的顾虑。 Since the conventional syringe outer cylinder, and the projecting small tubes or coils are all formed integrally, which needle retraction accommodated without safety features, in order to solve this problem, then developed in recent years a special needle retraction safety syringe, which is mainly composed of a outer cylinder with a reciprocable group consisting ram, and the front end of the outer cylinder chamber directly to a dedicated tipping a special production of the needle, when the injection is completed and when the push rod is displaced to a direction to the needle end of travel, by the front end of the push rod constituting the specific injection needle, and the push rod allows the dedicated snap needle, this time, pull the plunger rearward , lead to displacement of the needle with the dedicated access to the outer cylinder chamber, this way, when the injection operation is completed, the dedicated retractable needle enters the outer cylinder chamber, and avoided the needle exposed to the outside stab formed hazards, but safety retracting needle syringe that does not have a specific injection needle replacement function, causing inconvenience and health and safety concerns in the operation of the operation practice.

又该专用注射针的回縮式安全注射针筒仅适用其特殊制作的专用注射针,故无法达到广泛普遍应用的效果,故有必要作进一步研究改良。 Should the special needle retraction safety syringes is only its special needle specially made, it can not achieve the universal application of a wide range of effects, so there is need for further research and improvements. 【发明内容】 [SUMMARY]

本发明主要目的在于提供一种回縮式安全注射针筒,可依需要方便地换装各种不同规格的注射针,并使连接座连同注射针可以回缩进入外筒腔内,实现安全防护。 The main object of the present invention to provide a retractable safety syringe, can also need to be easy to dress different specifications of the needle, and together with the connector holder can be retracted into the outer needle cylinder chamber, to achieve security .

发明另一目的在于提供一种回縮式安全注射针筒,其通过盖头套筒与密封环圈热融接合成一体,以及连接座与外筒的分离构成,得以确保注射液防漏的可靠度。 Another object of the invention to provide a retractable safety syringe which integrally with the sleeve by the lid sealing collar heat fusion, and the connecting base constituting the separator outer cylinder, to ensure a leak-proof reliability Injection .

本发明又一目的在于提供一种回縮式安全注射针筒,其通过盖头套筒与密封环圈热融接合成一体,以及连接座与外筒的分离构成,使盖头套筒、连接座与外筒的构成得以自外筒前端塞入组合,以提高组 A further object of the present invention to provide a retractable safety syringe which integrally with the sleeve by the lid sealing collar heat fusion, and the connecting base and separation of the outer cylinder constitutes the lid sleeve connected to the base constituting the outer tube from the distal end is inserted into the outer cylinder combination, to improve the group

本发明的一种回縮式安全注射针筒,包含一外筒、 一盖头套筒、 一连接座、 一推杆及一注射针;该外筒为中空管体,其前端内腔与盖头套筒套合,该盖头套筒的内腔又与该连接座相套合,使该连接座置于外筒内腔前端;该推杆装置于该外筒内腔,该推杆可拉引该连接座连同注射针进入该外筒内部;其特征在于: A recoil safety syringe according to the present invention, comprises an outer tube, a lid sleeve connected to a housing, a plunger, and a needle; the outer cylinder is a hollow tubular body, with its front lid lumen fit the sleeve, the sleeve lumen lid and the base is connected with nested, so that the connector seated in the front end of the outer cylinder chamber; means the push rod chamber to the outer cylinder, the push rod can be pulled the connecting base along with the injection needle into the interior of the outer cylinder; characterized in that:

该盖头套筒是呈管状体,于该盖头套筒的内壁设有双头螺纹,通过该双头螺纹与注射针的针座凸缘相卡制,据以推进注射针紧套于连 The sleeve is a tubular lid body inner wall of the lid is provided with a double threaded sleeve, threaded through the double needle and the needle holder with clamping flange, according to advance the needle even in tight

接座所设的凸出小管的锥柱面上;于该盖头套筒的内壁双头螺纹末端毗邻并设数个环状配置的凸齿: The projecting tubular cylindrical socket of taper of the set; two-start thread in the inner wall of the lid and the adjacent end of the sleeve is provided a plurality of teeth arranged annularly:

该连接座包括一体构成的凸出小管及座身部,以该座身部与该推杆卡扣结合;该凸出小管是一外圆周呈锥柱状且中心设有中空流道, 且该凸出小管是容置于该盖头套筒的筒身内,该凸出小管前瑞与注射针的针座相接合,而该凸出小管后端延伸至与该连接座的座身部衔接;该座身部外周环状配设数个扣齿,藉该扣齿与盖头套筒腔内的凸齿相互卡制。 The protruded connecting base includes a base body and a tubular portion integrally formed to the body portion of the seat is combined with the locking ram; the projection is a tubular cylindrical outer circumference has a tapered flow passage and provided with a hollow center, and the projection within the tubular sleeve received in the barrel lid, the front tubular projection of the injection needle Swiss needle holder engages, and the projection extends to a rear end of the tubular body portion of the adapter connected to the seat base; the seat an annular body portion disposed on an outer periphery a plurality of sprocket, the sprocket by the sleeve and the lid each cavity clamping teeth.

所述的回缩式安全注射针筒,其特征在于:该盖头套筒、连接座是与该外筒呈三者分离的构件。 Retracting safety syringe according to, characterized in that: the lid sleeve connected to the holder with three separate outer cylindrical member has.

所述的回縮式安全注射针筒,其特征在于:该双头螺纹的有效螺牙长度等于或少于全螺牙长度的二分之一。 Said retracting safety syringe, wherein: the effective thread length equal to or less than half of the whole length of the thread is double threaded.

所述的回縮式安全注射针筒,其特征在于:该盖头套筒后段加设一密封环圈,该密封环圈与外筒内腔以及该密封环圈与连接座之间呈过盈配合。 Said retracting safety syringe, wherein: the lid rear sleeve section plus a sealing ring is provided, this sealing ring chamber between the outer cylinder and the seal ring and to form an interference connection base cooperation.

所述的回縮式安全注射针筒,其特征在于:该密封环圈是由弹性材料成型的管状体,且该密封环圈与该盖头套筒是热融结合形成--体状。 Said retracting safety syringe, wherein: the sealing ring is formed from an elastic material of the tubular body, and the seal ring and the lid sleeve is hot-melt bonded to form - like body.

本发明的回縮式安全注射针筒,该外筒的前端是与盖头套筒套 Retracting safety syringe according to the present invention, the distal end of the outer cylinder is set with the lid sleeve

合,盖头套筒的内腔又与连接座相套合,且该连接座的凸出小管设于该外筒内腔前端处,藉以衔接注射针;又该推杆装置于该外筒内腔, 可进行抽拉和推送运动,可进行药液抽取或注射,并拉引该连接座连同注射针进入该外筒内部。 Together, and the sleeve lumen lid and base are connected with nested, and the connector holder projecting tubular cavity is provided at the front end of the outer cylinder, whereby the injection needle adapter; should the plunger means to the outer cylinder chamber , push and pull motion may be performed, or the extraction liquid may be injected, and pulling the connector holder along with the injection needle into the interior of the outer cylinder.

该盖头套筒是套于该外筒内腔前端,该盖头套筒的筒身一端内壁设有半圈的双头螺纹,筒身的另端热融接合一密封环圈形成一体,通过筒身的外圆周面与外筒内腔紧密配合,藉以防制注射液自外筒前端内腔泄出,产生防漏的效果。 The lid sleeve is fitted onto the distal end of the outer cylinder chamber, one end of the inner wall of the barrel lid is provided with a double threaded sleeve half revolution, the other end of the barrel engages a hot melt sealing collar is formed integrally, by barrel the outer circumferential surface of the outer cylinder chamber close fit, thereby Prevention injection lumen escape from the outer tube distal end, an effect leakproof.

该连接座是装设于该盖头套筒内,该连接座包括一体构成的凸出小管及座身部,以该座身部与该推杆卡扣结合;该凸出小管是一外圆周呈锥柱状且中心设有中空流道,且该凸出小管是容置于该盖头套筒的筒身内,该凸出小管前瑞与注射针的针座相接合,而该凸出小管后端延伸至与该连接座的座身部衔接;该座身部外周环状配设数个扣齿,藉该扣齿与盖头套筒腔内的凸齿相互卡制,连接座的座身部的外圆周面与盖头套筒的密封环圈内腔紧密配合,藉以防止注射液自盖头套筒内壁泄出,产生防漏的效果。 The connection base is mounted inside the lid sleeve connected to the tubular holder comprises a convex portion formed integrally and the seat body to the base body in combination with the push rod locking portion; the projection is in the form a tubular outer circumferential and a center pillar provided with a hollow cone flow passage, and the tubular projection of the lid is received in the barrel sleeve, the front tubular projection of the injection needle Swiss needle holder engages, and the rear end of the tubular projection extending to interface with the connecting seat body base portion; the peripheral annular seat is provided with a plurality of body portions sprocket, the fastener by projecting teeth and scarf each clamping sleeve cavity, the seat body connected to the outer portion of the seat circumferential surface of the lid sleeve seal ring coil lumen tight fit, thereby preventing the lid from the injection sleeve the inner wall of overflow, generation of leak-proof effect.

以上是本发明结构的概述,而以下更举较佳可行的具体实施例, 并配合图式详细说明。 The above is an overview of the structure of the present invention and the following more preferred lift possible embodiment, and the detailed description with drawings. 【附图说明】 BRIEF DESCRIPTION

图1是现有的注射针筒结构示意图。 Figure 1 is a schematic view of a conventional syringe structure.

图2是另一种现有注射针筒结构示意图。 FIG 2 is a schematic diagram of another conventional syringe structure.

图3是本发明第一实施例的立体分解图。 FIG 3 is an exploded perspective view of a first embodiment of the present invention.

图4本发明第一实施例的轴向剖视图。 Axial direction of the first embodiment of the present invention a cross-sectional view of FIG.

图5是图4的2—2剖面图。 FIG 5 is a sectional view 2-2 of FIG.

图6本发明第一实施例使用状态的轴向剖视图。 The state of using an axial sectional view of a first embodiment of the present invention embodiment of FIG.

图7本发明第二实施例的轴向剖视图。 An axial sectional view of a second embodiment of the present invention FIG. 【具体实施方式】 【detailed description】

请参阅图3〜6,本发明回缩式安全注射针筒,主要包含一外筒10、 一盖头套筒40、 一连接座30、 一推杆20及一注射针90,其中, 该外筒10为中空管体,且该外筒10内腔于邻近前端处径向凸出形成一凸起环圈13,而使该外筒10内腔形成一前腔12及一后腔14。 Refer to FIG. 3 ~ 6, the retractable safety syringe according to the present invention, comprises a main outer cylinder 10, a lid sleeve 40, a connecting base 30, a plunger 20 and a needle 90, wherein the outer cylinder 10 is a hollow tube, and the lumen of the outer tube 10 adjacent to the front end of a protrusion is formed at a radially projecting collar 13, the lumen 10 of the outer cylinder 12 is formed a front chamber and a rear chamber 14.

该盖头套筒40是筒身400与密封环圈50的热融接合形成的管状体,是紧压配装于该前腔12;该盖头套筒40其筒身400的外周与该外筒10的前腔12呈过盈配合,供固定该盖头套筒40;该密封环圈50是由弹性材料(如:橡胶)成型的管状体,并通过该密封环圈50 外周圆与该外筒10前腔12内壁的紧密配合,据以形成前腔12与该盖头套筒40间形成密合效果,可提高注射液防漏的可靠度。 The lid 40 is a sleeve barrel 400 of the tubular body and the heat seal ring 50 is joined to form a melt, is pressed fitted to the front chamber 12; an outer periphery of the lid sleeve 40 with its barrel 400 of the outer cylinder 10 the front chamber 12 has an interference fit, for fixing the lid sleeve 40; the sealing collar 50 is made of an elastic material (eg: rubber) molded in the tubular body, and a circular through 50 the outer periphery of the seal ring and the outer cylinder 10 closely with the inner wall of the front chamber 12, to form a front chamber 12 according to the sleeve 40 is formed with the lid adhesion effect, can improve the reliability of injection leakproof. 于该盖头套筒40的内壁螺牙末端毗邻并另设数个环状配置的凸齿45。 Lid inner wall of the sleeve to the end of the thread 40 separate adjacent teeth 45 and a plurality of annular configuration.

该盖头套筒40于筒身400内壁设有双头螺纹46,该各螺纹46 彼此相位角互为180度,且该双头螺纹的各有效螺牙长度等于或少于全牙的一半长度,藉以防止双头螺纹的牙沟卡制注射针的针座92凸缘921,使注射针无法回縮至外筒10腔内。 The lid 400 of the sleeve 40 to the inner wall of the barrel is provided with a threaded stud 46, the threads 46 of each phase angle of 180 degrees from each other to each other, and each of the effective thread length of the stud is equal to or less than half of the thread length of the whole tooth, hub flange 92 so as to prevent the stud 921 threaded clamping sulcus injection needle, the injection needle 10 can not be retracted into the outer cylinder chamber.

该连接座30是由一凸出小管32及一座身部34 —体构成,且容置于该盖头套筒40的腔内;该连接座30的座身部34的末端与外筒10内腔的凸起环圈13形成抵持状,供抵制该连接座30退入外筒10 的后腔14;又该连接座30的凸出小管32亦容置于盖头套筒40的腔内,并自盖头套筒40的管口处向盖头套筒40内部呈锥形状扩张延伸, 与该座身部34衔接;又该座身部34外圆周与盖头套筒40的密封环圈50呈过盈配合,以形成该盖头套筒40与连接座30间的密合效果, 可提高注射液防漏的可靠度。 The connecting base 30 is formed by a projection 34 and a tubular body portion 32 - construct, the lid and received in the cavity 40 of the sleeve; end of the connector body portion 30 of the seat base 34 and the outer tube 10 of the lumen the projection 13 is formed resisting loop shape for resisting the connector holder 30 back into the chamber 14 after the outer cylinder 10; should the connecting base 30 projecting tubular sleeve 32 is also housed in the cavity 40 of the lid, and the lid from the nozzle into the interior of sleeve 40 as a lid expandable sleeve 40 extending tapered shape, the seat 34 engaged with the body portion; should the seat body portion 34 and the outer circumference of the lid sealing collar 40 of the sleeve 50 has an interference cooperate to form the lid sleeve 40 and the adhesion effect between the connector holder 30, can improve the reliability of injection leakproof.

又该座身部34外周环状配设数个扣齿362,藉该扣齿362与盖头套筒40腔内所设的凸齿45相互卡制,并据以限制该连接座30形成止旋,以提高连接座30与注射针接合的可靠度。 Should the peripheral annular seat 34 is provided with a plurality of body portions sprocket 362, the sprocket 362 and by the lid 40 of the sleeve cavity established by mutual clamping teeth 45, and accordingly forms a stop to limit rotation of the connecting base 30 to improve the reliability of the connection base 30 is engaged with the injection needle.

本发明通过外筒10、盖头套筒40及连接座30等分离式组态的 By the present invention, the outer cylinder 10, lid 40 and sleeve 30, split connector holder configured

构成,当操作注射针筒时,用手取一注射针卯将其针座92内腔套进凸出小管32,并顺时针旋转注射针90,针座92的凸缘921将卡制于盖头套筒40内腔嫘牙的牙沟内,且因顺时针旋转注射针90,使针座腔体的凸缘921受到该螺管螺纹的推引,即可确实密接地套紧于该凸出小管32,且通过该螺管螺纹与该针座92腔体凸缘921的止退作用, 使注射针不会发生意外脱落。 Configuration, when the operation of the injection syringe by hand to take a needle hub which mortise 92 set into the lumen of tubular projections 32, clockwise rotation of the needle 90 and needle hub 921 of the flange 92 on the lid clamping sleeve Lei lumen tube 40 teeth tooth groove, and because the injection needle 90 is rotated clockwise, the flange of the cavity of the needle hub 921 by pushing the lead screw threads tube can indeed close contact tightly to the sleeve projecting tubules 32, and is screwed through the threaded tube 92 with the hub flange cavity 921 retaining action, the injection needle does not come off accident. 当进行注射针筒操作时,通过抽拉该推杆20后退,进行注射液的抽吸作业。 When the operation of the syringe, by pulling back the plunger 20, sucking injection operation. 当注射液抽吸至预定的剂量后, 可进行注射作业,或是套回针盖,用手反时针旋转该注射针,将该注射针卸除,换装新的注射针后,再进行注射作业。 When the injection pumped to a predetermined dose, the injection operation can be carried out, or set the needle cover back, counterclockwise rotation of the needle, the needle removed, fitted with new injection needle by hand, and then injection operation. 当推杆20推送注射液前进至行程接近终点时,通过该推杆20前端与该连接座30的座身部34的卡扣结合,供该推杆20引带连接座30连同注射针90回縮进入该外筒10内部,达到针尖防护的安全目的;由于该推杆20及该连接座30的座身部34的构成与本发明在技术上并无必然关联,故不详述。 When the injection plunger 20 advances to push the seat body portion near the end of the stroke, the tip of the push rod 20 and the connecting seat 30 snap binding 34, the push rod 20 for connecting base 30 together with the pulley 90 back to the injection needle condensing into the interior of the outer cylinder 10, the needle tip protection security purposes; Since the push rod 20 and the connecting base body portion 30 constituting the seat 34 of the present invention is not necessarily associated with technically, it is not described in detail.

前述第一实施例于组装时,可先将该连接座30置入该盖头套筒40,再将该盖头套筒40连同连接座30自该外筒10前端直接插于外筒10前腔12接设,即可完成组装作业,由此可知,本发明由于组装程序上是可直接将该连接座30自该外筒10前端装入完成该连接座30的组装作业,故可提高该连接座30组装的方便性。 In the foregoing first embodiment, when assembled, is connected to the base of the lid 30 into the sleeve 40, the sleeve 40 together with the lid and then the front chamber 10 is connected to the base 30 from the front end of the outer cylinder 10 is directly inserted in the outer tube 12 then set, to complete the assembly work, can be seen, since the present invention is connected directly to the seat assembly 10 from the front end program 30 loaded into the outer tube to complete the assembly work of the connector holder 30, it can increase the connecting base ease of assembly 30.

再者,当注射针90装设时,其针座92凸缘921因手旋转而受到该螺纹46的推移,而旋入该盖头套筒40内部,待该针座92末端凸缘921到达接近该螺纹46末端时,该针座92即与该小管32相紧密套接,即可利用推杆抽取注射液进入外筒内腔至预定的剂量,进行注射作业。 Further, when the injection needle 90 is mounted, which needle hub flange 92 due to hand 921 by rotation of the threaded passage 46 and screwed into the inside of the lid sleeve 40 until the hub 92 reaches the close end flange 921 when the threaded end 46, i.e., the hub 92 and the socket 32 ​​close to the small tube, can be extracted using the injection ram into the outer cylinder chamber to a predetermined dose, the injection operation. 或,当注射液进入外筒内腔达预定的剂量时,套回针盖于针座,用手反时针旋转针座,将该己使用过的注射针卸下,用同样的操作方法更换新的注射针,再进行注射作业。 Or, when the injection fluid into the outer cylinder chamber of a predetermined dose, the needle cover to back cover needle hub, the needle hub hand rotates counterclockwise, the already used needle removed, replaced with a new method of operating the same an injection needle, then the injection operation.

本发明第二实施例是由前述第一实施例变化而得,二者相同之处 The second embodiment of the present invention is obtained by variation of the first embodiment from the foregoing embodiments, both the similarities

不再重复赘述;请参阅图9,本发明第二实施例,主要包含一外筒10'、 一推杆20'、 一连接座30'、 一盖头套筒40,及一密封环圈50',其 Are not repeated herein; see FIG. 9, a second embodiment of the present invention mainly comprises an outer cylinder 10 ', a pusher 20', a connecting base 30 ', a lid sleeve 40, and a seal ring 50' ,its

中,该密封环圈50'环束于该连接座30,的座身部36'外周并形成过盈配合,可提高止泄的可靠度。 , The seal ring 50 'is connected to the base ring beam 30, the seat body portion 36' and an outer periphery of an interference fit, the reliability can be improved vent stop.

前述为本发明具体可行的较佳实施例及其附图,但该等实施例仅是举例说明,并非用于限制本发明的保护范围。 The possible specific embodiments and the accompanying drawings of the preferred embodiment of the present invention, but these examples are only illustrative and not intended to limit the scope of the present invention.

Claims (5)

  1. 1.一种回缩式安全注射针筒,包含一外筒、一盖头套筒、一连接座、一推杆及一注射针;该外筒为中空管体,其前端内腔与盖头套筒套合,该盖头套筒的内腔又与该连接座相套合,使该连接座置于外筒内腔前端;该推杆装置于该外筒内腔,该推杆可拉引该连接座连同注射针进入该外筒内部;其特征在于: 该盖头套筒是呈管状体,于该盖头套筒的内壁设有双头螺纹,通过该双头螺纹与注射针的针座凸缘相卡制,据以推进注射针紧套于连接座所设的凸出小管的锥柱面上;于该盖头套筒的内壁双头螺纹末端毗邻并设数个环状配置的凸齿: 该连接座包括一体构成的凸出小管及座身部,以该座身部与该推杆卡扣结合;该凸出小管是一外圆周呈锥柱状且中心设有中空流道,且该凸出小管是容置于该盖头套筒的筒身内,该凸出小管前瑞与注射针的针座相接合,而 A retractable safety syringe, comprising an outer tube, a lid sleeve connected to a housing, a plunger, and a needle; the outer cylinder is a hollow tube, which sleeve distal lumen veil fit the cartridge, the lid and the sleeve lumen connector holder with nested, so that the connector seated in the distal end of the outer cylinder chamber; means the push rod chamber to the outer cylinder, the push rod which can be pulled connecting base along with the injection needle into the interior of the outer cylinder; characterized in that: the lid is a tubular sleeve body, on the inner wall of the lid has a double threaded sleeve, threaded stud by the needle hub and the needle flange phase card system, according to advance the needle to a tight seat connection established by projecting tubular cylindrical cone; double threaded inner wall of the lid to sleeve end and located adjacent a plurality of teeth arranged annularly: the connection base comprises a projecting tubular portion formed integrally and the seat body to the base body in combination with the push rod locking portion; the projection is a tubular cylindrical outer circumference has a tapered flow passage and provided with a hollow center, and the projection tubules lid inner sleeve received in the barrel, the front tubular projection of the injection needle Swiss needle seat engaged, and 该凸出小管后端延伸至与该连接座的座身部衔接;该座身部外周环状配设数个扣齿,藉该扣齿与盖头套筒腔内的凸齿相互卡制。 The rear end of the tubular projection extending into engagement with the connecting base body portion of the seat; the seat body is provided with an annular outer peripheral portion a plurality of sprocket, the sprocket by the sleeve and the lid each cavity clamping teeth.
  2. 2、 如权利要求1所述的回縮式安全注射针筒,其特征在于:该盖头套筒、连接座是与该外筒呈三者分离的构件。 2, as claimed in retracting safety syringe according to claim 1, wherein: the lid sleeve connected to the holder with three separate outer cylindrical member has.
  3. 3、 如权利要求1所述的回縮式安全注射针筒,其特征在于:该双头螺纹的有效螺牙长度等于或少于全螺牙长度的二分之一。 3. The retractable safety syringe as claimed in claim 1, wherein: the effective thread length equal to or less than half of the whole length of the thread is double threaded.
  4. 4、 如权利要求1所述的回縮式安全注射针筒,其特征在于:该盖头套筒后段加设一密封环圈,该密封环圈与外筒内腔以及该密封环圈与连接座之间呈过盈配合。 4. The retractable safety syringe as claimed in claim 1, wherein: the lid rear sleeve section plus a sealing ring is provided, the sealing ring and the outer cylinder chamber is connected with the sealing ring was an interference fit between the seats.
  5. 5、 如权利要求4所述的回縮式安全注射针筒,其特征在于:该密封环圈是由弹性材料成型的管状体,且该密封环圈与该盖头套筒是热融结合形成一体状。 5. The retractable safety syringe as claimed in claim 4, wherein: the sealing ring is formed from an elastic material of the tubular body, and the seal ring and the lid sleeve are integrally formed hotmelt binding shape.
CN 200410085934 2004-10-25 2004-10-25 Retraction type safety syringe CN100394991C (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4986813A (en) 1988-02-01 1991-01-22 The MadTech Group, Inc. Disposable hypodermic syringe
CN2423897Y (en) 2000-02-24 2001-03-21 王希平 Self-destroyed safety syringe
US6599268B1 (en) 2000-06-27 2003-07-29 Becton Dickinson And Company Hypodermic syringe with a selectively retractable needle
CN2744356Y (en) 2004-10-27 2005-12-07 镱太科技股份有限公司 Retraction type safety syringe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4986813A (en) 1988-02-01 1991-01-22 The MadTech Group, Inc. Disposable hypodermic syringe
CN2423897Y (en) 2000-02-24 2001-03-21 王希平 Self-destroyed safety syringe
US6599268B1 (en) 2000-06-27 2003-07-29 Becton Dickinson And Company Hypodermic syringe with a selectively retractable needle
CN2744356Y (en) 2004-10-27 2005-12-07 镱太科技股份有限公司 Retraction type safety syringe

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