WO2016179719A1 - 手动式静脉留置针组 - Google Patents

手动式静脉留置针组 Download PDF

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Publication number
WO2016179719A1
WO2016179719A1 PCT/CN2015/000118 CN2015000118W WO2016179719A1 WO 2016179719 A1 WO2016179719 A1 WO 2016179719A1 CN 2015000118 W CN2015000118 W CN 2015000118W WO 2016179719 A1 WO2016179719 A1 WO 2016179719A1
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WO
WIPO (PCT)
Prior art keywords
indwelling needle
fixing cylinder
needle fixing
puncture needle
cylinder
Prior art date
Application number
PCT/CN2015/000118
Other languages
English (en)
French (fr)
Inventor
洪志华
Original Assignee
洪志华
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 洪志华 filed Critical 洪志华
Priority to US15/572,403 priority Critical patent/US10653865B2/en
Priority to CN201580079618.4A priority patent/CN107921240B/zh
Priority to EP15891427.5A priority patent/EP3295984A4/en
Priority to PCT/CN2015/000118 priority patent/WO2016179719A1/zh
Publication of WO2016179719A1 publication Critical patent/WO2016179719A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0631—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0113—Mechanical advancing means, e.g. catheter dispensers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel

Definitions

  • the invention relates to medical devices, and in particular to a manual venous indwelling needle set.
  • Intravenous injection is a medical procedure that injects blood, liquid medicine, nutrient solution or other medical fluid into the vein. It can be divided into two types: transient and continuous.
  • transient intravenous injection known as Injection is to insert the needle directly into the patient's vein to achieve the infusion effect
  • continuous intravenous injection (known as the drip) is inserted into the patient's vein through a venous indwelling needle, and then replaced with a replaceable or supplemental
  • the medical fluid allows the medical fluid to be continuously replenished into the patient's body.
  • the conventional intravenous indwelling needle has a metal needle and a set of soft indwelling needles arranged on the metal needle.
  • the metal needle is inserted into the vein together with the soft indwelling needle by the hardness of the metal needle, and then extracted.
  • the metal needle allows the soft indwelling needle to remain on the human body, and finally the soft indwelling needle is attached to the medical fluid required by the patient, so that the soft indwelling needle can provide a continuous infusion effect.
  • the caregiver must first use the sheath to cover the metal needle before discarding, but in the process of setting, it may still be due to personal negligence or improper external force.
  • the safety indwelling needle disclosed in the CN100536944 patent uses a needle sleeve member and an extensible outer casing assembly to cover the entire metal needle, but the multi-layer sleeve design adopted in this conventional patent case The problem is that there are too many components in the structure and the assembly is not easy.
  • the main object of the present invention is to provide a manual venous indwelling needle set which is simple in structure and convenient to assemble, so as to increase the convenience in use.
  • the present invention provides a manual venous indwelling needle set, comprising: an indwelling needle fixing cylinder, wherein one end of the indwelling needle fixing cylinder has a set of joints and one adjacent to the a first positioning recess of the socket portion, the other end of the indwelling needle fixing cylinder has an outer flange and a second positioning recess adjacent to the outer flange; an indwelling needle detachably sleeved in the a socket portion of the indwelling needle fixing cylinder; a puncture needle fixing cylinder capable of being sleeved on the indwelling needle fixing cylinder between an injection position and a retracting position; a puncture needle fixed to the puncture needle One end of the fixed cylinder; a positioning ring seat, The positioning ring seat has a stopping step and at least one positioning elastic piece adjacent to the stopping step; wherein, when When the puncture needle fixing cylinder is located at the injection position, the puncture needle is located
  • the puncture needle fixing cylinder has an inner cylinder body and an outer cylinder body, and the outer cylinder body surrounds the circumference of the inner cylinder body to form a space with the inner cylinder body.
  • An axial passage the puncture needle fixing cylinder is sleeved on the indwelling needle fixing cylinder through the axial passage, and the puncture needle is fixed to one end of the inner cylinder of the puncture needle fixing cylinder, the positioning ring seat One end of the outer cylinder fixed to the puncture needle fixing cylinder.
  • One end of the outer cylinder of the puncture needle fixing cylinder has a buckle portion, the positioning ring seat has a snap groove, and the positioning ring seat is fastened to the puncture needle fixing cylinder through the snap groove The buckle portion of the outer cylinder.
  • the outer cylinder of the puncture needle fixing cylinder and the positioning ring seat are ultrasonically welded together.
  • the outer circumferential surface of the outer cylinder of the puncture needle fixing cylinder has a plurality of anti-slip ribs arranged side by side.
  • the positioning ring seat has a hollow groove adjacent to the stopping step, and the positioning elastic piece is located in the hollow groove and extends obliquely from the stopping step toward the indwelling needle.
  • the indwelling needle has a set of ends, and the sleeve end has an pressing ring.
  • the locking ring is movably disposed on the barrel of the indwelling needle fixing cylinder, wherein the inner side wall mask has an internal thread; the indwelling needle further has a set of ends, the sleeve end has An external thread; when the puncture needle fixing cylinder is in the injection position, the internal thread of the locking ring and the external thread of the indwelling needle are screwed together, when the puncture needle fixing cylinder is located in the retracting position The internal thread of the locking ring is disengaged from the external thread of the indwelling needle.
  • the locking ring further has a first opening and a second opening.
  • the first opening can be separately sleeved on the sleeve end of the indwelling needle, and the inner diameter of the second opening is slightly larger than The outer diameter of the first positioning recess of the indwelling needle fixing cylinder.
  • a first positioning recess of the indwelling needle fixing cylinder forms an abutting step near an end of the socket; when the first opening of the locking ring is sleeved at the socket end of the indwelling needle, Locking ring through The second opening abuts against the abutting step of the first positioning recess.
  • the invention has the advantages that when the puncture needle fixing cylinder is located at the injection position, the puncture needle is located in the indwelling needle, so that the indwelling needle can be inserted into the vein of the patient through the hardness of the puncture needle, and the positioning ring seat
  • the positioning elastic piece is disposed in the first positioning concave portion of the indwelling needle fixing cylinder, so that the positioning elastic piece of the positioning ring seat can maintain the inwardly folded state, and the puncture needle is disengaged when the puncture needle fixing cylinder is in the retracting position.
  • the needle is received in the indwelling needle fixing cylinder to avoid exposure.
  • the stopping step of the positioning ring seat abuts against the outer flange of the indwelling needle fixing cylinder to prevent mutual retention between the indwelling needle fixing cylinder and the puncture needle fixing cylinder
  • the positioning elastic piece of the positioning ring seat is embedded and embedded in the second positioning concave portion of the indwelling needle fixing cylinder to prevent the indwelling needle fixing cylinder from being arbitrarily moved by the improper external force, so that the puncture needle can be surely kept
  • the indwelling needle is fixed in the barrel.
  • the invention is applicable to various medical and health institutions such as hospitals and health centers.
  • Figure 1 is a perspective view of the present invention
  • Figure 2 is an exploded perspective view of the present invention
  • Figure 3 is a sectional view of the combination of the present invention, mainly showing the state in which the puncture needle fixing cylinder is at the injection position
  • Figure 4 is similar to Figure 3, mainly showing the state in which the puncture needle fixing cylinder is in the retracted position.
  • Figure 5 is a partial enlarged view of Figure 4.
  • Fig. 6 is similar to Fig. 4, and mainly shows the state in which the indwelling needle is removed from the indwelling needle fixing cylinder.
  • Figure 7 is a perspective view of another embodiment of the present invention.
  • Figure 8 is an exploded perspective view of another embodiment of the present invention.
  • Figure 9 is a sectional view showing a combination of the embodiment of the present invention, mainly showing the state in which the puncture needle fixing cylinder is at the injection position.
  • Figure 10 is similar to Figure 9 and mainly shows the state in which the puncture needle fixing cylinder is in the retracted position.
  • Figure 11 is similar to Figure 10, mainly showing the state of the indwelling needle after the self-retaining needle fixing cylinder is removed.
  • the manual venous indwelling needle set 10 of the present invention comprises an indwelling needle fixing cylinder 20, an indwelling needle 30, a puncture needle fixing cylinder 40, a puncture needle 50, and a positioning ring seat 60. .
  • One end of the indwelling needle fixing cylinder 20 has a set of connecting portions 21 and a first positioning adjacent to the socket portion 21
  • the recess 22 has a pressing ring 211 on the socket portion 21.
  • the other end of the indwelling needle holding cylinder 20 has an outer flange 23 and a second positioning recess 24 adjacent to the outer flange 23.
  • the indwelling needle 30 is made of a soft material (such as rubber), and is sleeved on the socket portion 21 of the indwelling needle fixing cylinder 20 during assembly, and the indwelling needle 30 is clamped by the pressing ring 211, so that the indwelling needle 30 does not It is easily detached from the socket portion 21.
  • the puncture needle fixing cylinder 40 has an inner cylinder 41 and an outer cylinder 42. As shown in FIGS. 3 and 4, the outer cylinder 42 surrounds the circumference of the inner cylinder 41 to form an axis with the inner cylinder 41.
  • the puncture needle fixing cylinder 40 is sleeved in the indwelling needle fixing cylinder 20 through the axial passage 43 during assembly, so that the inner cylinder 41 is housed in the indwelling needle fixing cylinder 20, and after the sleeve is set, the puncture needle fixing cylinder 40 is movable relative to the indwelling needle holding cylinder 20 between an injection position P1 and a withdrawal position P2. Further, as shown in FIG.
  • one end of the outer cylinder 42 of the puncture needle fixing cylinder 40 has two opposite locking portions 44, and the outer circumferential surface of the outer cylinder 42 of the puncture needle fixing cylinder 40 has a plurality of side-by-side arrangements.
  • the sliding ribs 45 and the plurality of anti-slip ribs 45 are adjacent to the two latching portions 44.
  • One end of the puncture needle 50 is fixed to one end of the inner cylinder 41 of the puncture needle fixing cylinder 40.
  • the puncture needle fixing cylinder 40 is located at the injection position P1 as shown in FIG. 3, the puncture needle 50 is inserted into the indwelling needle 30 when the puncture is performed.
  • the needle fixing cylinder 40 is located at the needle withdrawal position P2 as shown in FIG. 4, the needle 50 is detached from the indwelling needle 30 and accommodated in the indwelling needle fixing cylinder 20.
  • the positioning ring seat 60 has a large ring portion 61 and a small ring portion 62.
  • the large ring portion 61 is connected to one end surface of the small ring portion 62 and forms a stop step portion with the small ring portion 62.
  • the small ring portion 62 has two hollow slots 64 and two positioning elastic pieces 65.
  • the two hollow slots 64 are disposed adjacent to the blocking step 63 and are oppositely disposed.
  • the two positioning elastic pieces 65 are respectively located in a hollow slot 64 and are respectively self-stopping.
  • the step portion 63 is obliquely extended toward the direction of the indwelling needle 30 (as shown in FIG. 3), whereby when the puncture needle fixing cylinder 40 is located at the injection position P1 as shown in FIG.
  • the positioning elastic piece 65 of the positioning ring seat 60 is located.
  • the positioning elastic piece 65 of the positioning ring seat 60 is retracted and embedded in the indwelling needle fixing cylinder.
  • the second positioning recess 24 of the 20 is located.
  • the small ring portion 62 of the positioning ring base 60 further has two locking grooves 66 which are oppositely disposed adjacent to the stopping step portion 63. The positioning ring seat 60 is fastened to the puncture through the two locking grooves 66.
  • the locking portion 44 of the outer cylinder 42 of the needle fixing cylinder 40 is fixed to the outer cylinder 42 of the puncture needle fixing cylinder 40.
  • the positioning ring seat 60 can also be coupled to the puncture needle by ultrasonic welding.
  • the outer cylinder 42 of the cylinder 40 does not require the arrangement of the buckle portion 44 and the snap groove 66 at this time.
  • the puncture needle fixing cylinder 40 is first kept as shown in FIG.
  • the injection position P1 is shown, so that the indwelling needle 30 can pierce the skin through the hardness of the puncture needle 50.
  • the positioning elastic piece 65 of the positioning ring seat 60 is located in the first positioning concave portion 22 of the indwelling needle fixing cylinder 20 to maintain the orientation.
  • the inner collapsible state, and the bottom of the indwelling needle fixing cylinder 20 abuts against the bottom of the axial passage 43 of the puncture needle fixing cylinder 40, so that the puncture needle 50 does not retract into the indwelling needle 30 during the piercing of the skin.
  • the indwelling needle 20 can be fixed in a pressing manner, and the puncture needle fixing cylinder 40 is pulled backward, so that the puncture needle 50 is driven by the puncture needle fixing cylinder 40 to gradually withdraw from the indwelling needle 30.
  • the puncture needle fixing cylinder 40 is located at the retracting position P2.
  • the positioning elastic piece 65 of the positioning ring seat 60 is embedded in the second positioning concave portion 24 of the indwelling needle fixing cylinder 20 so that the puncture needle fixing cylinder 40 can no longer be pushed forward to ensure that the puncture needle 50 can be completely completed. It is housed in the indwelling needle fixing cylinder 20 without being exposed.
  • the indwelling needle 30 is separated from the indwelling needle fixing cylinder 20, the puncture needle 50, and the puncture needle fixing cylinder 40. As shown in Fig. 6, the indwelling needle 30 remaining on the patient's body can be used with the medical fluid required by the patient. Further connections.
  • the manual venous indwelling needle set 10 of the present invention is slidably designed by the puncture needle fixing cylinder 40, and is further matched between the positioning elastic piece 65 of the positioning ring seat 60 and the second positioning concave portion 24 of the indwelling needle fixing cylinder 20.
  • the inlaid relationship and the snap-fit relationship between the stop step 63 of the retaining ring seat 60 and the outer flange 23 of the indwelling needle retaining barrel 20 provide a more compact structure of the present invention than conventional techniques.
  • the user can simultaneously collect the puncture needle 50 into the indwelling needle fixing cylinder 20 during the process of disassembling the indwelling needle 30, thereby achieving the effect of one step operation, and being simple and convenient to use, thereby achieving the object of the present invention.
  • FIG. 7 to FIG. 11 are another embodiment of the present invention.
  • the manual venous indwelling needle set 70 provided by this embodiment has the same structure and components as the previous embodiment, and the difference lies in the embodiment.
  • the manual venous indwelling needle set 70 further includes a locking ring 80 movably disposed on the barrel of the indwelling needle fixing barrel 90, having an internal thread 81, a first opening 82 and a first Two openings 73.
  • the first positioning recess 92 of the indwelling needle fixing cylinder 90 forms an abutting step 921 near one end of the socket portion 91.
  • the indwelling needle 100 further has a set of ends 101, and the socket end 101 has an external thread 102.
  • the internal thread 81 is located on the inner wall surface of the locking ring 80, and the first opening 82 is detachably sleeved on the socket end 101 of the indwelling needle 100, so that the internal thread 81 of the locking ring 80 and the external thread 102 of the indwelling needle 100 can Screw together.
  • the inner diameter of the second opening 82 is slightly larger than the outer diameter of the first positioning recess 92 of the indwelling needle holding cylinder 90 such that the locking ring 80 is restricted from moving within the first positioning recess 92.
  • the locking ring 80 is abutted against the first positioning recess 92 of the indwelling needle fixing cylinder 90 through the second opening 83.
  • the sleeve portion 921 of the portion 91, and the first opening 82 of the locking ring 80 is sleeved on the sleeve end 101 of the indwelling needle 100, so that the internal thread 81 of the locking ring 80 and the external thread 102 of the indwelling needle 100 are screwed together.
  • the indwelling needle 100 is locked to the socket portion 91 of the indwelling needle fixing cylinder 90 so that the puncture needle 120 does not retract into the indwelling needle 100 during piercing of the skin.
  • the puncture needle fixing cylinder 110 is located at the retracting position P2 as long as the locking ring 80 is rotated to disengage the internal thread 81 of the locking ring 80 from the external thread 102 of the indwelling needle 100, as shown in FIG. 11, the locking ring 80 can be made.
  • the internal thread 81 and the external thread 102 of the indwelling needle 100 are separated from each other. Thereby, the indwelling needle 100 can be fixed more stably.
  • the manual venous indwelling needle set provided by the invention is suitable for use by a large number of medical and health institutions, and has a very broad industrial application prospect.

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Abstract

一种手动式静脉留置针组（10），具有留置针固定筒（20）、设于留置针固定筒（20）的留置针（30）、可移动地套设于留置针固定筒（20）的穿刺针固定筒（40）、固定于穿刺针固定筒（40）的穿刺针（50），以及固定于穿刺针固定筒（40）且环绕穿刺针（50）的定位环座（60）。当穿刺针固定筒（40）位于退针位置时，拉动穿刺针（50）脱离留置针（30），使穿刺针（50）位于留置针固定筒（20）内而避免外露，同时定位环座（60）会抵靠且嵌卡于留置针固定筒（20），防止留置针固定筒（20）与穿刺针固定筒（40）之间相互分离，达到简化结构以及组装方便的效果。

Description

手动式静脉留置针组 技术领域
本发明与医疗器材有关，特别是指一种手动式静脉留置针组。
现有技术
静脉注射是一种将血液、药液、营养液或其他医疗液体注入静脉内的医疗行为，在实施上主要可以区分为短暂性与连续性两种形式，所谓的短暂性静脉注射(即俗称的打针)是以针头直接插入病患的静脉内来达到输液效果，而连续性静脉注射(即俗称的打点滴)是通过一静脉留置针插入病患的静脉之后，然后再接上可更换或补充的医疗液体，使医疗液体能够持续补充至病患的身体内。
一般来说，传统的静脉留置针具有一金属针与一套设于金属针的软质留置针，在操作时通过金属针的硬度将金属针与软质留置针一起插入静脉内，接着再抽出金属针而让软质留置针留在人体上，最后再将软质留置针接上病患所需要的医疗液体，使软质留置针能够提供连续输液效果。然而在抽出金属针之后，为了避免金属针刺伤他人，护理人员必须先使用护套将金属针套住之后才能进行丢弃动作，不过在套设过程中仍然有可能因为个人的疏忽或不当外力的碰撞而发生被金属针刺伤的意外。为了解决上述问题，CN100536944号专利案所揭示的安全留置针是使用针套部件与可伸长的外壳组件将整根金属针覆盖住，但是此一习用专利案所采用的多层套筒设计会造成在结构上具有零组件过多及组装不易的问题。
发明内容
本发明的主要目的是提供一种手动式静脉留置针组，其结构简单且组装方便，以增加使用上的便利性。
为达到上述目的，本发明提供的一种手动式静脉留置针组，其特征在于包含有：一留置针固定筒，所述留置针固定筒的一端具有一套接部及一邻设于所述套接部的第一定位凹部，所述留置针固定筒的另一端具有一外凸缘与一邻设于所述外凸缘的第二定位凹部；一留置针，能拆卸地套设于所述留置针固定筒的套接部；一穿刺针固定筒，能在一注射位置与一退针位置之间移动地套设于所述留置针固定筒；一穿刺针，固定于所述穿刺针固定筒的一端；一定位环座， 设于所述穿刺针固定筒的一端且环绕于所述穿刺针，所述定位环座具有一挡止阶部及至少一邻设于所述挡止阶部的定位弹片；其中，当所述穿刺针固定筒位于所述注射位置时，所述穿刺针位于所述留置针内，所述定位环座的定位弹片位于所述留置针固定筒的第一定位凹部内，当所述穿刺针固定筒位于所述退针位置时，所述穿刺针脱离所述留置针且位于所述留置针固定筒内，所述定位环座的挡止阶部抵靠于所述留置针固定筒的外凸缘，所述定位环座的定位弹片内收而嵌设于所述留置针固定筒的第二定位凹部内。
上述本发明的技术方案中，所述穿刺针固定筒具有一内筒体及一外筒体，所述外筒体环绕于所述内筒体的周围而与所述内筒体之间形成一轴向通道，所述穿刺针固定筒通过所述轴向通道套设于所述留置针固定筒，所述穿刺针固定于所述穿刺针固定筒的内筒体的一端，所述定位环座固定于所述穿刺针固定筒的外筒体的一端。
所述穿刺针固定筒的外筒体的一端具有一卡扣部，所述定位环座具有一卡扣槽，所述定位环座通过所述卡扣槽扣接于所述穿刺针固定筒的外筒体的卡扣部。
所述穿刺针固定筒的外筒体与所述定位环座之间以超声波熔接方式结合在一起。
所述穿刺针固定筒的外筒体的外周面具有多个呈并排设置的止滑凸条。
所述定位环座具有一邻设于所述挡止阶部的镂空槽，所述定位弹片位于所述镂空槽内且自所述挡止阶部朝所述留置针的方向倾斜延伸而出。
所述留置针具有一套接端，所述套接端具有一紧迫环。
更包含有一锁定环，所述锁定环能移动地设于所述留置针固定筒的筒身，其内侧壁面具有一内螺纹；所述留置针更具有一套接端，所述套接端具有一外螺纹；当所述穿刺针固定筒位于所述注射位置时，所述锁定环的内螺纹与所述留置针的外螺纹相互螺合，当所述穿刺针固定筒位于所述退针位置时，所述锁定环的所述内螺纹与所述留置针的所述外螺纹相互脱离。
所述锁定环更具有一第一开孔以及一第二开孔，所述第一开孔能分离地套设于所述留置针的套接端，所述第二开孔的内径略大于所述留置针固定筒的第一定位凹部的外径。
所述留置针固定筒的第一定位凹部靠近所述套接部的一端形成一抵靠阶部；所述锁定环的第一开孔套设在所述留置针的套接端时，所述锁定环通过所 述第二开孔抵靠在所述第一定位凹部的抵靠阶部。
采用上述技术方案，本发明的优点在于：当穿刺针固定筒位于注射位置时，穿刺针会位于留置针内，使留置针能通过穿刺针的硬度插入病患的静脉内，而且，定位环座的定位弹片会位设于留置针固定筒的第一定位凹部内，使定位环座的定位弹片能维持向内收合的状态，当穿刺针固定筒位于退针位置时，穿刺针会脱离留置针且容纳于留置针固定筒内，以避免外露，此外，定位环座的挡止阶部会抵靠于留置针固定筒的外凸缘，以防止留置针固定筒与穿刺针固定筒之间互相分离，而且，定位环座的定位弹片会内收而嵌设于留置针固定筒的第二定位凹部内，以防止留置针固定筒受到不当外力的作用而任意移动，使穿刺针能够确实保持在留置针固定筒内。
本发明适用于医院、卫生所等各种医疗卫生机构。
附图说明
图1  是本发明的立体图
图2  是本发明的立体分解图
图3  是本发明的组合剖视图，主要显示穿刺针固定筒位于注射位置的状态
图4  类同于图3，主要显示穿刺针固定筒位于退针位置的状态
图5  为图4的局部放大图。
图6  类同于图4，主要显示留置针自留置针固定筒拆下后的状态。
图7  是本发明另一实施例的立体图。
图8  是本发明另一实施例的立体分解图。
图9  是本发明另一实施例的组合剖视图，主要显示穿刺针固定筒位于注射位置的状态
图10  类同于图9，主要显示穿刺针固定筒位于退针位置的状态
图11  类同于图10，主要显示留置针自留置针固定筒拆下后的状态
本发明最佳实施方式
请先参阅图1及图2，本发明的手动式静脉留置针组10包含有一留置针固定筒20、一留置针30、一穿刺针固定筒40、一穿刺针50，以及一定位环座60。
留置针固定筒20的一端具有一套接部21及一邻设于套接部21的第一定位 凹部22，其中套接部21上具有一紧迫环211。留置针固定筒20的另一端具有一外凸缘23与一邻设于外凸缘23的第二定位凹部24。
留置针30由软质材料(如橡胶)所制成，在组装时套设于留置针固定筒20的套接部21，并且通过紧迫环211卡撑住留置针30，使留置针30不会轻易的脱离套接部21。
穿刺针固定筒40具有一内筒体41及一外筒体42，如图3及图4所示，外筒体42环绕于内筒体41的周围而与内筒体41之间形成一轴向通道43，穿刺针固定筒40在组装时通过轴向通道43套设于留置针固定筒20，使内筒体41容纳于留置针固定筒20内，而且在套设之后，穿刺针固定筒40能相对留置针固定筒20在一注射位置P1与一退针位置P2之间移动。此外，如图2所示，穿刺针固定筒40的外筒体42的一端具有二相对的卡扣部44，穿刺针固定筒40的外筒体42的外周面具有多个呈并排设置的止滑凸条45，多个止滑凸条45邻设于二卡扣部44。
穿刺针50的一端固定于穿刺针固定筒40的内筒体41的一端，当穿刺针固定筒40位于如图3所示注射位置P1时，穿刺针50穿设于留置针30内，当穿刺针固定筒40位于如图4所示的退针位置P2时，穿刺针50脱离留置针30而容纳于留置针固定筒20内。
如图2所示，定位环座60具有一大环部61与一小环部62，大环部61连接于小环部62的一端面而与小环部62之间形成一挡止阶部63，小环部62具有二镂空槽64及二定位弹片65，二镂空槽64邻设于挡止阶部63且呈相对设置，二定位弹片65分别位于一个镂空槽64内且分别自挡止阶部63朝留置针30的方向倾斜延伸而出(如图3所示)，由此，当穿刺针固定筒40位于如图3所示注射位置P1时，定位环座60的定位弹片65位于留置针固定筒20的第一定位凹部22内，当穿刺针固定筒40位于如图4所示的退针位置P2时，定位环座60的定位弹片65内收而嵌设于留置针固定筒20的第二定位凹部24内。此外，如图2所示，定位环座60的小环部62更具有二相对地邻设于挡止阶部63的卡扣槽66，定位环座60通过二卡扣槽66扣接于穿刺针固定筒40的外筒体42的卡扣部44而固定于穿刺针固定筒40的外筒体42，然而需要补充说明的是，定位环座60也可以利用超声波熔接方式结合于穿刺针固定筒40的外筒体42，这时候就不需要卡扣部44与卡扣槽66的设置。
经由上述结构可知，当要注射时，首先将穿刺针固定筒40保持在如图3所 示的注射位置P1，使留置针30能通过穿刺针50的硬度刺穿皮肤，这时候的定位环座60的定位弹片65会位于留置针固定筒20的第一定位凹部22内，以维持向内收合的状态，而留置针固定筒20的底部会抵顶于穿刺针固定筒40的轴向通道43的底部，使得穿刺针50在刺穿皮肤的过程中不会缩入留置针30内，当留置针30顺利插入静脉内之后，便可以按压的方式固定留置针20，并将穿刺针固定筒40往后拉动，使穿刺针50被穿刺针固定筒40所带动而逐渐退出留置针30，如图4、图5所示，直到定位环座60的挡止阶部63抵靠于留置针固定筒20的外凸缘23时，穿刺针固定筒40即位于退针位置P2，此时的定位环座60的定位弹片65会顺势内收而嵌设于留置针固定筒20的第二定位凹部24内，使穿刺针固定筒40无法再被往前推动，以确保穿刺针50能完全容纳于留置针固定筒20内而不外露，这时候即可顺势将留置针30与留置针固定筒20、穿刺针50及穿刺针固定筒40分离，如图6所示，留在病患身体上的留置针30即可与病患所需要的医疗液体作进一步的连接。
综上所述，本发明的手动式静脉留置针组10通过穿刺针固定筒40的可滑动设计，再搭配定位环座60的定位弹片65与留置针固定筒20的第二定位凹部24之间的嵌设关系及定位环座60的挡止阶部63与留置针固定筒20的外凸缘23之间的卡接关系，使本发明相较于习用技术具有更加简洁的结构。再者，使用者只要在拆卸留置针30的过程中，便可同时将穿刺针50收入留置针固定筒20，而达到一步操作的效果，在使用上较为简单方便，进而达到本发明的目的。
图7至图11为本发明的另一实施例，此一实施例所提供的手动式静脉留置针组70，其大部分结构与组件均与前述实施例相同，其不同之处在于本实施例所提供的手动式静脉留置针组70更包含有一锁定环80，锁定环80可移动地设于留置针固定筒90的筒身，其具有一内螺纹81、一第一开孔82以及一第二开孔73。留置针固定筒90的第一定位凹部92靠近套接部91的一端形成一抵靠阶部921。留置针100更具有一套接端101，套接端101具有一外螺纹102。其中，内螺纹81位于锁定环80的内侧壁面，第一开孔82可分离地套设于留置针100的套接端101，使得锁定环80的内螺纹81与留置针100的外螺纹102能够相互螺合。第二开孔82的内径略大于留置针固定筒90的第一定位凹部92的外径，使得锁定环80被限制在第一定位凹部92内移动。
通过上述结构，当穿刺针固定筒110位于注射位置P1时，如图9所示，锁定环80通过第二开孔83抵靠在留置针固定筒90的第一定位凹部92靠近套接 部91的套接部921，并且锁定环80的第一开孔82套设在留置针100的套接端101，让锁定环80的内螺纹81与留置针100的外螺纹102相互螺合而将留置针100锁固在留置针固定筒90的套接部91，使得穿刺针120在刺穿皮肤的过程中不会缩入留置针100内。当穿刺针固定筒110位于退针位置P2时，只要转动锁定环80让锁定环80的内螺纹81与留置针100的外螺纹102相互脱离，如图11所示，便可让锁定环80的内螺纹81与留置针100的外螺纹102相互脱离。由此，能够更稳定的固定留置针100。
工业应用性
本发明提供的手动式静脉留置针组适合广大医疗、卫生机构使用，具有非常广阔的工业应用前景。

Claims (10)

  1. 一种手动式静脉留置针组，其特征在于包含有：
    一留置针固定筒，所述留置针固定筒的一端具有一套接部及一邻设于所述套接部的第一定位凹部，所述留置针固定筒的另一端具有一外凸缘与一邻设于所述外凸缘的第二定位凹部；
    一留置针，能拆卸地套设于所述留置针固定筒的套接部；
    一穿刺针固定筒，能在一注射位置与一退针位置之间移动地套设于所述留置针固定筒；
    一穿刺针，固定于所述穿刺针固定筒的一端；
    一定位环座，设于所述穿刺针固定筒的一端且环绕于所述穿刺针，所述定位环座具有一挡止阶部及至少一邻设于所述挡止阶部的定位弹片；
    其中，当所述穿刺针固定筒位于所述注射位置时，所述穿刺针位于所述留置针内，所述定位环座的定位弹片位于所述留置针固定筒的第一定位凹部内，当所述穿刺针固定筒位于所述退针位置时，所述穿刺针脱离所述留置针且位于所述留置针固定筒内，所述定位环座的挡止阶部抵靠于所述留置针固定筒的外凸缘，所述定位环座的定位弹片内收而嵌设于所述留置针固定筒的第二定位凹部内。
  2. 如权利要求1所述的手动式静脉留置针组，其特征在于：所述穿刺针固定筒具有一内筒体及一外筒体，所述外筒体环绕于所述内筒体的周围而与所述内筒体之间形成一轴向通道，所述穿刺针固定筒通过所述轴向通道套设于所述留置针固定筒，所述穿刺针固定于所述穿刺针固定筒的内筒体的一端，所述定位环座固定于所述穿刺针固定筒的外筒体的一端。
  3. 如权利要求2所述的手动式静脉留置针组，其特征在于：所述穿刺针固定筒的外筒体的一端具有一卡扣部，所述定位环座具有一卡扣槽，所述定位环座通过所述卡扣槽扣接于所述穿刺针固定筒的外筒体的卡扣部。
  4. 如权利要求2所述的手动式静脉留置针组，其特征在于：所述穿刺针固定筒的外筒体与所述定位环座之间以超声波熔接方式结合在一起。
  5. 如权利要求2所述的手动式静脉留置针组，其特征在于：所述穿刺针固定筒的外筒体的外周面具有多个呈并排设置的止滑凸条。
  6. 如权利要求1所述的手动式静脉留置针组，其特征在于：所述定位环座 具有一邻设于所述挡止阶部的镂空槽，所述定位弹片位于所述镂空槽内且自所述挡止阶部朝所述留置针的方向倾斜延伸而出。
  7. 如权利要求1所述的手动式静脉留置针组，其特征在于：所述留置针具有一套接端，所述套接端具有一紧迫环。
  8. 如权利要求1所述的手动式静脉留置针组，其特征在于：更包含有一锁定环，所述锁定环能移动地设于所述留置针固定筒的筒身，其内侧壁面具有一内螺纹；所述留置针更具有一套接端，所述套接端具有一外螺纹；当所述穿刺针固定筒位于所述注射位置时，所述锁定环的内螺纹与所述留置针的外螺纹相互螺合，当所述穿刺针固定筒位于所述退针位置时，所述锁定环的所述内螺纹与所述留置针的所述外螺纹相互脱离。
  9. 如权利要求8所述的手动式静脉留置针组，其特征在于：所述锁定环更具有一第一开孔以及一第二开孔，所述第一开孔能分离地套设于所述留置针的套接端，所述第二开孔的内径略大于所述留置针固定筒的第一定位凹部的外径。
  10. 如权利要求9所述的手动式静脉留置针组，其特征在于：所述留置针固定筒的第一定位凹部靠近所述套接部的一端形成一抵靠阶部；所述锁定环的第一开孔套设在所述留置针的套接端时，所述锁定环通过所述第二开孔抵靠在所述第一定位凹部的抵靠阶部。
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US10653865B2 (en) 2020-05-19
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EP3295984A4 (en) 2018-11-07
CN107921240A (zh) 2018-04-17

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