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Número de publicaciónCN102631732 A
Tipo de publicaciónSolicitud
Número de solicitudCN 201210089838
Fecha de publicación15 Ago 2012
Fecha de presentación30 Mar 2012
Fecha de prioridad30 Mar 2012
También publicado comoCN102631732B
Número de publicación201210089838.3, CN 102631732 A, CN 102631732A, CN 201210089838, CN-A-102631732, CN102631732 A, CN102631732A, CN201210089838, CN201210089838.3
Inventores朱乔平, 陈巧芳
Solicitante杭州龙德医用器械有限公司
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos:  SIPO, Espacenet
Low-resistance piston component of syringe
CN 102631732 A
Resumen
The invention discloses a low-resistance piston component of a syringe, which comprises a piston and a connector. The piston is provided with a piston inner hole, and the connector is sleeved in the piston inner hole; at least the front end of the piston is provided with a recess; the connector is provided with a press plate corresponding to the recesses and a neck corresponding to the piston inner hole; the press plate is provided with a conical peripheral surface with the large outer end and the small inner end, and the diameter of the outer end of the press plate is larger than that of a front port of each recess; the depth of each recess is equal to the thickness of the press plate; the length difference between the connector and the piston is equal to the depth of each recess; and a lip is arranged on the outer peripheral edge of each end, with the corresponding recess, of the piston. Due to expansion of air pressure in cavities at front and rear ends of the piston during pushing and pulling and squeezing of the press plate, the piston is adaptive to the pressure of a hole wall in a jacket, and push-and-pull resistance of the syringe is reduced.
Reclamaciones(10)  traducido del chino
1. 一种注射器低阻力活塞组件,其特征在于:包括设有一活塞内孔的活塞和套设在所述活塞内孔中的连接头;至少在所述活塞的前端设有一凹陷;所述连接头设有一对应所述凹陷的压板和对应所述活塞内孔的颈部;所述压板设有外端大内端小的圆锥周面,并且压板的外端直径大于所述凹陷的前端口直径;所述凹陷的深度等于所述压板的厚度;所述连接头与所述活塞的长度差等于所述凹陷的深度;在所述活塞设有凹陷端的外周边上设有一唇边。 A low resistance syringe piston assembly comprising: a piston provided with a piston bore and a sleeve disposed in the bore of the piston head connected; at least at the front end of the piston is provided with a recess; said connecting head is provided with a recess corresponding to said platen and corresponding to the neck portion of the piston bore; said pressure plate provided with a large outer end of the inner circumferential surface of the conical end of the small, and the diameter of the outer end of the front plate port is greater than the diameter of the recess ; the recess depth equal to the thickness of the plate; the difference in length between the connection head and the piston is equal to the depth of the depressions; provided with a lip on the piston with a recessed end of the outer periphery.
2.根据权利要求I所述的低阻力活塞组件,其特征在于:所述凹陷呈倒圆锥台,该凹陷的圆锥角小于所述压板的圆锥角,其角度差为5〜15度。 According to claim I wherein the low resistance of the piston assembly, wherein: the recessed inverted truncated cone, the cone angle of the recess is smaller than the cone angle of the plate, which angle difference is 5 to 15 degrees.
3.根据权利要求I或2所述的低阻力活塞组件,其特征在于:在所述活塞另一端面上设有一端面凸环;所述端面凸环的高度小于所述凹陷的深度。 According to claim I or 2 wherein the low resistance of the piston assembly, characterized in that: the other end face of the piston ring is provided with a convex end surface; the height of the end face of the rim is less than the depth of the recess.
4.根据权利要求I或2所述的低阻力活塞组件,其特征在于:所述唇部截面包括靠近所述活塞前端面的弧形段和远离所述活塞前端面的平直段;所述平直段与所述活塞的外周面的夹角为120〜160度。 According to claim I or 2, wherein the low resistance of the piston assembly, wherein: said cross section comprises a lip proximate said arcuate section and the front end face of the piston away from the straight section of the front face of the piston; the the angle between the straight section of the outer circumferential surface of the piston is 120~160 degree.
5.根据权利要求3所述的低阻力活塞组件,其特征在于:所述唇部截面包括靠近所述活塞前端面的弧形段和远离所述活塞前端面的平直段;所述平直段与所述活塞的外周面的夹角为120〜160度。 Low resistance according to claim 3, wherein the piston assembly, wherein: said cross section comprises a lip proximate said arcuate section of the piston and the front end face of the straight section of the piston away from the front face; the straight section and the angle between the outer circumferential surface of the piston is 120~160 degree.
6.根据权利要求I或2所述的低阻力活塞组件,其特征在于:所述活塞内孔中设有至少一道与所述颈部密封接触的密封凸环。 According to claim I or 2 wherein the low resistance of the piston assembly, characterized in that: said piston bore is provided with at least a neck portion in sealing contact with the sealing rim.
7.根据权利要求3所述的低阻力活塞组件,其特征在于:所述活塞内孔中设有至少一道与所述颈部密封接触的密封凸环。 Low resistance according to claim 3, wherein the piston assembly, wherein: the inner bore of the piston is provided with at least a sealing contact with the neck portion of the sealing rim.
8.根据权利要求4所述的低阻力活塞组件,其特征在于:所述活塞内孔中设有至少一道与所述颈部密封接触的密封凸环。 Low resistance according to claim 4, wherein the piston assembly, wherein: the inner bore of the piston is provided with at least a sealing contact with the neck portion of the sealing rim.
9.根据权利要求5所述的低阻力活塞组件,其特征在于:所述活塞内孔中设有至少一道与所述颈部密封接触的密封凸环。 Low resistance according to claim 5, wherein the piston assembly, wherein: the inner bore of the piston is provided with at least a sealing contact with the neck portion of the sealing rim.
10.根据权利要求5所述的低阻力活塞组件,其特征在于:所述连接头后端设有一轴向的连接孔,连接孔中设有一内凸环;在所述注射器的注射杆头端设有一与所述内凸环卡接的外凸环。 10. The low resistance of the piston assembly of claim 5, wherein: the rear end of the connector connecting hole has an axial connection hole has an inner rim; at the head end of the syringe injection There is a projection of the inner convex ring snap ring.
Descripción  traducido del chino

一种注射器低阻力活塞组件 A syringe low resistance of the piston assembly

技术领域 Technical Field

[0001] 本发明涉及一种注射装置,特别是涉及一种注射器的低阻力活塞组件,其与注射器外套和推杆配合形成低阻力注射器。 [0001] The present invention relates to an injection device, particularly to a low resistance syringe piston assembly jacket and putting the syringe with the formation of a low resistance syringe.

背景技术 Background

[0002] 注射器是一种常用的医疗器械。 [0002] The injector is a commonly used medical devices. 通常注射器包括外套和活塞推杆。 Typically syringe including coats and piston putter. 为了得到一个较好的密封效果,活塞需要与外套内壁进行较紧的贴合。 In order to get a good seal, the Pistons need to coat the inner wall of a tight fit. 其结果是操作者操作非常困难,极大地增加了使用者的劳动强度。 As a result, the operator is very difficult to operate, greatly increases the user's labor intensity. 公告号为CN100435871C的中国发明专利公开了一种低阻力注射器,包括注射筒身和在筒身内滑动的推液柱塞,活塞为环形密封圈,密封圈的端面沿其圆周方向设有一圈开口槽;活塞固定装置具有设置在密封圈上方的嵌合部件和设置在密封圈下方的支撑部件,嵌合部件的边沿设有一圈下端正好嵌在密封圈端面开口槽内的凸缘,支撑部件将密封圈固定在嵌合部件下方。 Bulletin No. CN100435871C the Chinese invention patent discloses a low resistance syringe comprising a syringe body in the barrel and slide piston to push the liquid, an annular piston seals, face seals are provided around opening groove along the circumferential direction ; fixing device having a piston disposed above the seal ring fitting member and disposed below the support member, rim engaging member is provided around the lower end of the flange is embedded in the right end surface of the seal ring groove of the opening, the supporting sealing member ring in the bottom of the fitting parts. 采用这种结构的注射器,密封圈会随筒体内空气压力的改变挤开涨大或回弹缩小,它与注射筒体内壁间的接触面就会随筒体内空气压力的改变而改变,用该种密封圈作注射器活塞,其灵敏度较高,筒体内压力一有变化,密封圈就会挤开涨大或回弹缩小,从而达到低阻力、强密封的目的。 With this structure, a syringe, seals vary with changes in air pressure in the cylinder body squeeze shrink swollen or rebound, it syringe body wall of the contact surface will change with the barrel of the air pressure changed, with the Species syringe piston seal for high sensitivity, the body changes a pressure tube, seal it will open up the big squeeze or rebound reduced, so as to achieve low resistance, strong sealing purposes. 由于该注射器的活塞是采用其上的一圈开口槽和一嵌合部件实现的。 As the plunger of the syringe is to use the open slot on the circle and a fitting member implementation. 嵌合部件在将活塞向外撑开的同时也向内撑开,使活塞的内孔缩紧在推杆的外周。 Engaging member in the outward but also inward piston distraction distraction, so that the hole in the outer periphery of the piston tightening putter. 因此,该活塞结构的注射器在推杆拉动时会与活塞扣紧锁死,嵌件也不再使活塞向外撑开,不能达到与筒身的密封。 Thus, the syringe when the plunger structure will pull the plunger and the piston fastening lock, insert the piston outwardly no longer distraction, can not achieve a seal with the barrel of.

发明内容 DISCLOSURE

[0003] 本发明要解决的技术问题是提供一种注射器低阻力活塞组件,其通过对该组件的结构进行改进,使注射器在推杆推动时活塞与外套的密封压力取决于外套前腔内的压力,因此,当注射器缓慢推动时具有较小的阻力。 [0003] The technical problem to be solved by the present invention is to provide a low resistance syringe piston assembly through the structural components to improve, the syringe when the plunger to push the piston seal and coat the cavity pressure depends on the jacket front pressure, therefore, has less resistance when slowly pushing the syringe. 而采用一连接头与活塞配合的活塞组件结构,使推杆在拉动时,活塞只向外撑开与外套产生有效密封,同样,该密封压力取决于推杆拉动时的速度。 The use of a coupling head and piston with a piston assembly structure, the push rod is pulled, stretched out and coat the piston only produce an effective seal, the same, the sealing pressure is dependent on the speed of the plunger is pulled. 因此,当使用者缓慢拉动推杆时,具有较小的阻力。 Thus, when the user slowly pulling the plunger has a small resistance. 从而利用本发明的注射器可实现减轻使用者的劳动强度的目的。 To take advantage of the present invention can be achieved to reduce the user's syringe labor intensity.

[0004] 本发明的上述技术问题主要是通过下述技术方案得以解决的:一种注射器低阻力活塞组件,包括设有一活塞内孔的活塞和套设在所述活塞内孔中的连接头;至少在所述活塞的前端设有一凹陷;所述连接头设有一对应所述凹陷的压板和对应所述活塞内孔的颈部;所述压板设有外端大内端小的圆锥周面,并且压板的外端直径大于所述凹陷的前端口直径;所述凹陷的深度等于所述压板的厚度;所述连接头与所述活塞的长度差等于所述凹陷的深度;在所述活塞设有凹陷端的外周边上设有一唇边。 [0004] The above-mentioned technical problem of the invention is mainly solved by the following technical solutions: one low resistance syringe piston assembly includes a piston bore has a piston and sleeve disposed within the bore of the piston in the connector; at least at the front end of the piston is provided with a depression; the connection head is provided with a recess corresponding to said platen and a corresponding internal bore of the piston neck; the plate with an outer end of a large conical inner circumferential surface of the small end, and the platen is larger than the outer diameter of the front end of the diameter of the port recess; said recess of a depth equal to the thickness of the plate; the difference in length between the piston head and the connection is equal to the depth of the recess; said piston is provided There is a lip on the end of the outer periphery of a depression. 通过活塞在推拉时前后端腔室的空气压力胀开和压板挤压,使活塞自适应与注射器的外套内孔壁的压力,减少了注射器的推拉阻力。 By sliding piston in air pressure before and after the end of the expansion chamber opening and the pressure plate squeezed the syringe piston adaptive coat the walls of the bore pressure to reduce the sliding resistance of the syringe.

[0005] 为了使压板有效挤压活塞前端上的凹陷并防止压板与凹陷挤压咬死,所述凹陷呈倒圆锥台,该凹陷的圆锥角小于所述压板的圆锥角,其角度差为5〜15度。 [0005] In order to effectively squeeze recessed plate on the front end of the piston and prevents extrusion plate with recessed killed, said recess inverted truncated cone, the cone angle of the recess is smaller than the cone angle of the plate, and the angle deviation of 5 ~ 15 degrees. [0006] 作为进一步的优选技术方案,在所述活塞另一端面上设有一端面凸环;所述端面凸环的高度小于所述凹陷的深度。 [0006] As a further preferred aspect, the other end face of the piston ring is provided with a convex end surface; the height of the end face of the rim is less than the depth of the recess. 当推杆推动时用于与推杆的密封,并使连接头在推杆推动下压板从凹陷中脱出,由活塞前端腔室的压力对活塞作自适应胀开,实现低阻力注射。 When the rod is used to seal and push the plunger, and the connector plate at the push rod driven emerge from the depression, the pressure piston front end of the piston chamber open for adaptive inflation, low resistance injection.

[0007] 作为进一步的优选技术方案,所述唇部截面包括靠近所述活塞前端面的弧形段和远离所述活塞前端面的平直段;所述平直段与所述活塞的外周面的夹角为120〜160度。 [0007] As a further preferred aspect, the cross-section comprises a lip proximate said arcuate section of the piston and away from the front end face of the straight section of the front end surface of the piston; the straight section of the outer circumferential surface of the piston The angle of 120~160 degree. 通过该结构的唇部设置,使活塞在推动和拉动时与外套内孔壁具有较一致的压力。 Set by the lip of the structure, the piston in the pushing and pulling with the outer wall of the hole has a more consistent pressure.

[0008] 为了进一步增强连接头与活塞的密封性,所述活塞内孔中设有至少一道与所述颈部密封接触的密封凸环。 [0008] In order to further enhance the connection head and the tightness of the piston, the piston bore is provided with at least a sealing contact with the neck of the sealing rim.

[0009] 作为进一步的优选技术方案,所述连接头后端设有一轴向的连接孔,连接孔中设有一内凸环;在所述注射器的注射杆头端设有一与所述内凸环卡接的外凸环。 [0009] As a further preferred aspect, the rear end of the connector connecting hole has an axial connection hole has an inner rim; at the head end of the injection syringe provided with a projection of the inner ring convex snap ring. 通过该卡接结构,推杆可较容易地卡入连接头中,实现活塞在外套中的推拉动作。 With this card access structure, putter can be more easily snaps into the connector, the realization of a piston sliding action of the jacket.

[0010] 本发明的技术方案,采用活塞前端上的凹陷和连接头上的压板,实现对活塞在推拉时与外套内孔壁的挤压压力自适应,实现注射器在使用时的低阻力。 [0010] aspect of the present invention, a plate on the front end of the recess and the connection of the piston head, to achieve the sliding piston in the extrusion pressure jacket bore wall adaptive achieve syringe during use low resistance. 同时,通过唇部的结构优化,使注射器在推动和拉动动作时具有较一致的挤压压力。 At the same time, through the lips structure optimization, the syringe having a relatively uniform nip pressure at pushing and pulling movements.

附图说明 Brief Description

[0011] 图I为包括本发明的注射器结构示意图。 [0011] Figure I is a structure of the present invention comprises a syringe Fig.

[0012] 图2为本发明的结构示意图。 [0012] The structure of Figure 2 of the present invention.

[0013] 图3为本发明中活塞的结构示意图。 [0013] FIG. 3 is a schematic structural diagram of the piston of the invention.

[0014] 图4为本发明中连接头的结构示意图。 [0014] FIG. 4 is a schematic structural view of the connector of the invention.

[0015] 图5为本发明中外套的结构示意图。 [0015] FIG. 5 is a schematic structural view of the invention coat.

[0016] 图6为本发明中推杆的结构示意图。 [0016] FIG. 6 is a schematic diagram of the structure of the invention putter.

[0017] 其中,外套I、前腔101、前腔端面1011、后腔102、推杆2、连接部201、外凸环202、肩胛部203、折断口204、活塞3、凹陷301、凹陷周面3011、凹陷端口3012、唇部302、弧形段3021、平直段3022、活塞内孔303、密封凸环304、端面凸环305、凹陷圆锥角α、连接头4、压板401、压板周面4011、压板端面4012、压板圆锥角β、颈部402、连接孔403、内凸环404。 [0017] where coat I, before the chamber 101, the front end surface of the cavity 1011, after the chamber 102, the plunger 2, the connecting portion 201, a convex ring 202, scapular 203, broken port 204, the piston 3, the recess 301, the recess week 3011 face, sunken port 3012, the lip 302, a curved section 3021, straight section 3022, bore piston 303, sealing rim 304, end protruding ring 305, recessed cone angle α, connector 4, plate 401, the platen week surface 4011, the end face plate 4012, plate cone angle β, neck 402, connecting holes 403, 404 in the rim.

[0018] 下面通过实施例,并结合附图,对本发明的技术方案作进一步具体的说明。 [0018] The following examples are by, in conjunction with the accompanying drawings, the technical aspect of the present invention will be more specifically described.

具体实施方式 DETAILED DESCRIPTION

[0019] 参见图I和图2,一种注射器低阻力活塞组件,其用于与之配套使用的外套I和与活塞组件连接的推杆2组成低阻力注射器。 [0019] 2. A low resistance syringe piston assembly for use with matching coat I and a push rod connected to the piston assembly see Figure I and Figure 2 form a low resistance syringe. 其中,活塞组件包括活塞3和套设在活塞3中的连接头4。 Wherein the piston assembly includes a piston 3 and a piston sleeve disposed in the connector 3 4. 活塞组件与外套I内孔作密封滑动连接,在外套I内孔中形成位于活塞组件前端的前腔101和位于活塞组件后端的后腔102。 Piston assembly and the jacket I bore for sealing slide connected to form the front end of the piston assembly 101 and the front chamber after the rear end of the piston assembly chamber 102 in the hole in the jacket I.

[0020] 参见图3和图4,活塞3通过活塞中间的活塞内孔303套设在连接头4的一颈部402上。 [0020] Referring to Figure 3 and Figure 4, the piston 3 in the middle of the hole through the piston sleeve piston 303 is located in the connector 4 of a neck 402. 在活塞3头端设有一凹陷301,在活塞3该凹陷端的外周边上设有一唇部302。 3 end of the piston has a depression 301 has a lip 302 on the outer periphery of the recessed side of the piston 3. 在活塞内孔303靠近凹陷处设有二道密封凸环304,在活塞3后端面上靠近活塞内孔303处设有一道端面凸环305。 Near depression has two channels in the piston bore 303 sealing rim 304, the rear end surface of the piston 3 is close to the piston end face of the hole 303 has a rim 305. 该凹陷301设有一圆锥的凹陷周面3011,其凹陷圆锥角α为50度。 The recess 301 has a conical recess peripheral surface 3011, which depressed the cone angle α is 50 degrees.

[0021] 连接头4的如端为一压板401,在压板401的后端为颈部402,在颈部402中间为一连接孔403,连接孔403中靠近口端处设有一内凸环404。 [0021] As the tip 4 is connected to a pressure plate 401, 401 at the rear end of the neck plate 402, 402 in the neck in the middle of a connection hole 403, a connection hole 403 is provided near the outlet end of an inner rim 404 . 在连接头4的压板401外周上设有一个压板周面4011。 In the connector 401 of the platen 4 is provided with an outer peripheral surface of the platen week 4011. 该压板周面4011为一锥面,设有一个压板圆锥角β,该压板圆锥角β为60度。 The peripheral surface of the platen 4011 as a cone with a cone angle plate β, the plate cone angle β is 60 degrees.

[0022] 凹陷301的凹陷端口3012直径略小于连接头压板401前的直径。 [0022] depressed recess 301 3012 port connector diameter slightly smaller than the diameter of the front plate 401. 连接头4通过颈部402套设在活塞内孔303中,通过活塞内孔303中的密封凸环304作密封滑动连接。 4 neck connector 402 is arranged around the piston bore 303 through the hole 303 in the piston sealing rim 304 for sealing the sliding connection. 连接头4的压板401配合在活塞3的凹陷301中。 Connecting plate 401 with the head 4 in the recess 301 of the piston 3. 由于压板401前端的直径略大于活塞凹陷301端口的直径,并且,压板周面4011的压板圆锥角β大于凹陷周面3011的凹陷圆锥角α,所以压板401的压板周面4011与凹陷端口3012接触,并在连接头4带动下作轴向运动时,压板周面4011挤压凹陷301,使活塞3靠近凹陷端的外周面向外胀开,使唇部302与外套I内孔壁形成密封。 Since the plate 401 is slightly larger than the diameter of the front end of the recess diameter piston 301 port, and the peripheral surface of the platen plate is larger than the cone angle β 4011 recessed circumferential surface 3011 of the recessed cone angle α, so the platen peripheral surface of the platen 401 4011 contact with the depressed port 3012 and when the drive connector 4 mainly as an axial movement, pressing plate recess peripheral surface 4011 301, the outer periphery of the piston 3 is close to the end of the recess opening outwardly bulging, so that the lip 302 and the outer wall of the inner bore I form a seal.

[0023] 活塞的唇部302的截面包括位于活塞3前端的弧形段3021和紧接弧形段后的平直段3022。 [0023] The cross section of the lip of the piston 302 includes a curved front end of the piston section 3 straight section immediately following the 3021 and 3022 after the arcuate segment. 该平直段3022与活塞3外周面的夹角为140度。 The angle of the straight section 3022 and the outer circumferential surface of the piston 3 is 140 degrees. 当活塞组件在推杆2推动下进行推动时,由于该唇部302仅靠前腔101中的压力胀开;而活塞组件在推杆2作用下拉动时,活塞唇部302主要是通过压板401对凹陷301的挤压,其压力往往大于活塞组件在推动时的压力。 When the piston assembly in pushing the plunger 2 were driven, as the lip 302 alone in front of pressure expansion chamber 101 open; and when the piston assembly under the action of pulling the plunger 2, piston lip 302 mainly through the platen 401 301 to sag squeeze, the pressure is often greater than the pressure in the piston assembly when pushed. 因此,该结构的唇部302可使活塞组件不管在推动还是拉动时均具有较一致的压力,实现在推拉均具有低阻力的注射器。 Thus, the lip 302 of the piston assembly structure can have more consistent pressure regardless of the push or pull, the realization of the syringe have low resistance to sliding.

[0024] 参见图5,在外套前腔101有一个前腔端面1011,端面中间设有一注射出口。 [0024] Referring to FIG. 5, the jacket front chamber 101 has a front end face of the cavity 1011, end in the middle has a shot outlet. 该前腔端面1011为一大锥角的锥面。 The front chamber end surface 1011 is a large cone angle of the cone. 在连接头4的前端也设有一个压板端面4012,该压板端面4012设有一个与前腔端面1011配合的锥面。 In the front end of the connector 4 is also provided with a pressure plate end face 4012, 4012 of the plate end face is provided with a tapered end surface 1011 and the front chamber. 使推杆2向前推动后,连接头4的压板端面4012与外套I的前腔端面1011贴合,实现注射或用以排出外套前腔101中的空气。 The push rod 2 is pushed forward, the connection end face of the first four plate front chamber 4012 and the jacket I end face of 1011 together, the injectable or jacket for discharging air in the front chamber 101.

[0025] 参见图6,推杆2的截面呈十字形,在头端设有一个连接部201,在连接部201的稍后位置设有一折断口204。 [0025] Referring to Figure 6, the push rod 2 is cross-shaped cross-section, is provided at the head end a connection portion 201, the connecting portion 201 is provided with a position later broken port 204. 该连接部201包括可插入连接头4的连接孔403中的半球头结构,在该连接部201上设有一外凸环202。 The connecting portion 201 may be inserted into the connection hole includes a head 4 of the hemispherical head structure 403, on which the connecting portion 201 is provided with a convex ring 202. 该连接部201截面也呈十字形,外凸环202呈断续的四个部分。 The connecting portion 201 also was a cross-sectional, convex ring 202 was four parts intermittent. 推杆2通过该连接部201上的外凸环202与连接头4连接孔403中的内凸环404配合与连接头4连接。 The plunger 2 by the convex portion 201 of the connecting ring 202 and connector 4 connecting hole 403 of the inner rim 404 mating connection with the connector 4. 在连接部201的后端设有一肩胛部203,当推杆2在外套I中推动时与活塞3上的端面凸环305相抵,形成端面密封。 At the rear end of the connecting portion 201 is provided with a shoulder portion 203, when the plunger 2 in the jacket I push with the end face of the projection 3 on the balance piston ring 305, formed seal. 注射器在使用完后,可通过推杆2上的折断口204折断推杆,防止注射器的重复使用。 Syringe after use, can break through the plunger opening 204 break on the plunger 2 to prevent reuse of the syringe.

[0026] 注射器在使用时,通过推动推杆2使活塞组件沿外套I内孔壁向前移动,由于在前腔101中存在空气,活塞组件移动时产生的空气压力在凹陷301中挤压,使活塞唇部302与外套I内孔壁贴紧,形成密封。 [0026] When using the syringe, so that by pushing the push rod 2 moves forward along the outer piston assembly I bore wall, due to the presence of air in the front chamber 101, the air pressure generated when the movement of the piston assembly 301 in the recess extrusion, the piston lip 302 and the jacket I bore wall snapping, forming a seal. 由于该唇部302与外套I内孔壁的密封压力来自前腔101的空气压力,因此,使活塞组件在外套I内孔壁中的移动具有较小的阻力。 Since the lip 302 and the outer wall of the inner hole I seal pressure from the air pressure of the front chamber 101, and therefore, the piston assembly in the housing bore wall I having less resistance movement. 而当通过推杆2拉动活塞组件进行抽取动作时,推杆2通过内凸环404和外凸环202拉动连接头4,使连接头4上的压板401挤压凹陷301,与活塞凹陷处形成有效密封,同时,活塞3上的唇部302向外胀开与外套I内孔壁形成有效密封。 When decimating action by pulling the piston assembly plunger 2, the plunger 2 through the inner rim 404 and convex ring 202 to pull the connector 4, the connecting plate 401 on the extrusion head 4 depressions 301, and the piston depression formed effective seal, while the lip 3 on the outward expansion piston 302 and the jacket I open the hole wall to form an effective seal. 唇部302向外胀开的程度取决于压板401对凹陷301的挤压程度。 Lip 302 open outward expansion depends on the extent of 401 pairs of extruded plate depressions 301. 因此,速度越慢则该活塞组件与外套I内孔壁的阻力就越小。 Thus, the slower the piston assembly and the jacket I bore wall resistance is smaller. 压力取决于活塞组件在外套I中的移动速度。 Pressure depends on the speed of movement of the piston assembly of the jacket I.

[0027] 上述实施例是为了更清楚地理解本发明,并不作为对本发明权利的一种限制,在不脱离本发明宗旨的前提下,可以有各种各样的变化,所有这些对所述领域技术人员显而易见的修改将包括在本权利要求的范围之内。 [0027] The above examples are provided to more clearly understand the present invention, and not as a limitation on the rights of the present invention without departing from the spirit of the invention premise, you can have a variety of changes, all of which the those skilled in the obvious modifications be included within the scope of the claims.

Citas de patentes
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CN1736501A *9 Sep 200522 Feb 2006余利荣Injection with low resistance
CN201143332Y *27 Ene 20085 Nov 2008房东森Disposable syringe piston
CN202605444U *30 Mar 201219 Dic 2012杭州龙德医用器械有限公司Low-resistance piston assembly of syringe
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Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
CN104759005A *21 Abr 20158 Jul 2015山东淄博山川医用器材有限公司Low-resistance injector piston and injector
Clasificaciones
Clasificación internacionalA61M5/315
Eventos legales
FechaCódigoEventoDescripción
15 Ago 2012C06Publication
3 Oct 2012C10Entry into substantive examination
13 Nov 2013C14Grant of patent or utility model