WO2023272435A1 - 一种卡片锁止式防针刺伤留置针 - Google Patents

一种卡片锁止式防针刺伤留置针 Download PDF

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Publication number
WO2023272435A1
WO2023272435A1 PCT/CN2021/102757 CN2021102757W WO2023272435A1 WO 2023272435 A1 WO2023272435 A1 WO 2023272435A1 CN 2021102757 W CN2021102757 W CN 2021102757W WO 2023272435 A1 WO2023272435 A1 WO 2023272435A1
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WO
WIPO (PCT)
Prior art keywords
needle
locking
card
housing
needle tube
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Application number
PCT/CN2021/102757
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English (en)
French (fr)
Inventor
陈永曦
Original Assignee
福建省百仕韦医用高分子股份有限公司
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 福建省百仕韦医用高分子股份有限公司 filed Critical 福建省百仕韦医用高分子股份有限公司
Priority to CN202180101972.8A priority Critical patent/CN117940178A/zh
Priority to PCT/CN2021/102757 priority patent/WO2023272435A1/zh
Publication of WO2023272435A1 publication Critical patent/WO2023272435A1/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
    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Definitions

  • the invention relates to an indwelling needle, in particular to a card-locking indwelling needle for preventing needle-puncture injury.
  • the anti-needle indwelling needle used in the existing clinical medical treatment adopts a method of wrapping the needle tip.
  • the needle tube is placed at a certain distance from the needle tip to flatten the needle tube to form a protrusion with a width greater than the outer diameter of the needle tube, or close to the needle tip.
  • the needle tube is divided into two sections at a certain distance.
  • the needle tip section is welded to form a bulge with an outer diameter larger than the needle tube section. It is equipped with a closed metal reed with a certain length enough to wrap from the bulge to the needle tip.
  • the reed is another One end is provided with a needle hole that is slightly larger than the outer diameter of the needle tube but less than the width of the protrusion.
  • the purpose of the present invention is to overcome the disadvantages of the prior art, and provide a card-locking anti-needle indwelling needle which can prevent the needle tip from penetrating and hurting people without special treatment of the needle tube.
  • a card-locking anti-needle indwelling needle including a catheter assembly and a puncture needle assembly
  • the catheter assembly includes a catheter base and a catheter connected to it, and is characterized in that: the puncture needle assembly includes a needle assembly and needle tip locking connector, the needle tube assembly includes a needle tube, an operation sleeve, a needle seat and an exhaust plug, and the needle tip locking connector includes a locking connector cover and a locking connector mounting seat, inside the locking connector mounting seat It is equipped with a top pressure compression spring, a toggle block, a needle tube detection swing piece and a card locking piece.
  • the locking connector mounting seat is a square open shell, and one is provided in the middle of the longitudinal two walls of the shell.
  • the toggle block In the arc-shaped needle-passing groove passing through the needle tube, the toggle block is arranged along the side wall of the bottom of the housing, and the mode of sliding block and track is adopted between the toggle block and the housing along the bottom of the housing.
  • a top pressure compression spring is set between the toggle block and one end wall of the housing, one end of the top pressure compression spring is connected to the end wall of the housing, and the other end of the top pressure compression spring is connected to the
  • the toggle block on the side of the toggle block facing the open side of the housing, is provided with a first push groove for accommodating the push arm of the pendulum detecting pendulum, and on the side of the toggle block facing the other side wall of the housing There is a second push groove for accommodating the card locking piece.
  • the needle tube detection swing member is an arc-shaped horn-shaped member.
  • a swing shaft is arranged on the needle tube detection swing member.
  • the swing shaft is separately arranged in the horn-shaped member On both sides, the swing shaft on one side is supported by the locking connector mounting seat, and the swing shaft on the other side is supported by the locking connector head cover.
  • the swing shaft deviates from the center of the horn-shaped component, and the horn-shaped component is divided into two parts: one long and one short on the left and right.
  • the long section is used as the needle tube detection arm, and the short section is used as the swing member push arm.
  • the thickness of the needle tube detection arm in the direction parallel to the swing axis is greater than the corresponding thickness of the swing piece push arm.
  • the upper end of the card locking piece is embedded in the second push groove of the toggle block, and the lower part of the card locking piece is positioned on the lower side wall of the housing
  • the card hole on the card locking piece is located on the line connecting the two needle grooves of the housing, that is, the needle tube longitudinal passageway.
  • the needle tube detection arm of the needle tube detection swing member swings into the housing when there is no needle tube in the locking connector.
  • the longitudinal passage of the needle tube blocks the longitudinal passage of the needle tube.
  • the locking connection head cover and the locking connection head mounting seat are snap-fitted.
  • the conical protrusion is matched with the inner cavity of the catheter base, and a protrusion convenient for pushing the handle is provided on the outer side of the locking connection cover, and the operation sleeve is set on the needle tip locking connector
  • one end of the operation sleeve is an open end, and the operation sleeve is inserted into the locking connector from the open end, and the diameter of the other end of the operation sleeve matches the outer diameter of the small end of the needle holder, and the small diameter of the needle holder
  • the head end is embedded in the operation sleeve, the needle
  • the seat is a stepped structure, the inner cavity of the small end is provided with a certain depth of needle tube fixed glue dispensing point,
  • the card lock type anti-needle indwelling needle of the present invention after the indwelling needle is successfully punctured and placed in the catheter, the index finger of the operator pushes the hand against the locking connector, the thumb and middle finger pinch and clamp the operation sleeve, and pull it away from the catheter.
  • the operation sleeve, the puncture needle tube fixed on it is withdrawn from the catheter assembly, and the needle tip of the needle tube retreats into the locking connector.
  • the detection arm is no longer constrained by the needle tube , in a free state, and at the same time, the upper push arm of the needle tube detection oscillating part also loses the constraint on the hooking of the toggling block, and the toggling block slides along the direction of the elastic force under the action of the top pressure compression spring, but passes through the swinging part on the toggling block
  • the pusher arm is pushed by the toggle groove, so that the needle tube detection swing part swings, and the needle tube detection arm tilts to the needle tube longitudinal passage to block the passage.
  • the slide of the toggle block also presses the card locking piece longitudinally through the second push groove.
  • the positioning restriction of the positioning groove at the lower part of the card locking piece cannot slide, so that the card locking piece can only ride around the outer surface of the needle tube through the upper card hole, and tilts towards the axis of the needle tube, so that the sharp edge on the side of the card hole on the card is tight. Pinch the outer surface of the needle tube and pin the needle tube, so that the needle tip of the needle tube is locked between the needle tube detection arm and the locking card, and the needle tube can no longer slide forward and backward relative to the locking connector, achieving the purpose of wrapping the needle tip and preventing the needle tip from hurting people.
  • An arc-shaped flange is arranged on the outer side of the tapered protrusion of the locking connection head cover, and the arc-shaped flange matches with the outer periphery of the conduit seat.
  • An arc-shaped flange is added on the locking connection head cover, and the catheter base is installed between the arc-shaped flange and the tapered protrusion, which can play a role in supporting the catheter base.
  • the ribs provided can improve the support strength of the arc flange and the matching degree with the catheter base.
  • a limiting boss for limiting excessive lateral deviation of the card locking piece is arranged on the inner side of the locking connection head cover.
  • the positioning of the card locking piece in the positioning groove on the lower side wall of the housing is that after the card locking piece is inserted into the positioning groove, the elastic block acts as a positioning block for positioning.
  • This connection mode is adopted between the card locking piece and the positioning slot, so that the gap between the two In fact, it is a kind of soft connection to avoid damage to the card caused by hard connection.
  • the positioning groove on the lower side wall of the housing is either two positioning protrusions arranged at intervals and extending toward the upper side wall of the housing on the lower side wall of the housing, and the distance between the two protrusions is the positioning groove; or A positioning protrusion extending toward the upper side wall of the housing is provided on the lower side wall of the housing, and a groove is opened on the upper part of the protrusion.
  • the top of the positioning protrusion is located at the lower edge of the needle tube longitudinal passage in the housing to support the needle tube. effect.
  • a plurality of needle retaining ribs are arranged at intervals on the upper edge of the needle tube longitudinal passage in the housing, and the needle retaining ribs are perpendicular to the bottom surface of the housing.
  • the upper end surface of the positioning protrusion is either a plane or a rib, and the rib is parallel to the pin retaining rib.
  • a needle stopper is also arranged on the side of the needle tube longitudinal passageway close to the locking connection head cover, and the needle stopper is parallel to the bottom surface of the housing.
  • the needle retainer is arranged on the needle retainer rib.
  • the needle retaining rib and the needle retaining piece can improve the positioning of the needle tube.
  • the specific structure of the slider and the track between the toggle block and the housing is that a section of arc-shaped outer cylinder is set on the contact surface where the toggle block contacts the housing, and the rest is set as an arc-shaped inner groove.
  • On the surface where the shell is in contact with the toggle block there is a chute that is used in conjunction with the arc-shaped outer cylinder on the toggle block.
  • the arc-shaped outer cylinder slides in the chute, and the other arc-shaped
  • the inner groove and the chute on the housing form a cavity for installing the top pressure compression spring.
  • An arc-shaped stop end is arranged on the end surface of the second pushing groove of the toggle block.
  • the present invention has the following advantages:
  • the needle tip of the needle tube gradually withdraws from the catheter assembly and retreats into the locking connector.
  • the combined effect of the moving block, the needle tube detection swing member and the card locking piece makes the needle tube stuck in the card hole of the card locking piece, so that the needle tip of the needle tube is locked between the needle tube detection arm and the locking card, and the needle tube is connected to the locking card.
  • the head can no longer slide forward and backward, achieving the purpose of wrapping the needle point and preventing the needle point from hurting people.
  • Fig. 1 is a schematic diagram of the card-locking needle-stick prevention indwelling needle of the present invention.
  • Fig. 2 is a partial cross-sectional schematic diagram of the card-locking needle-stick prevention indwelling needle of the present invention.
  • Fig. 3 is a schematic diagram of the mounting seat of the locking connector.
  • Fig. 4 is a partial schematic view of the mounting seat of the locking connector.
  • Fig. 5 is a schematic diagram of the locking connection head cover.
  • Fig. 6 is a schematic diagram of another angle of the locking connection head cover.
  • Fig. 7 is a schematic diagram of the card locking piece.
  • Fig. 8 is a schematic diagram of a toggle block.
  • Fig. 9 is a schematic diagram of another angle of the toggle block.
  • Fig. 10 is a schematic diagram of a pendulum detecting pendulum.
  • Fig. 11 is a schematic diagram of another angle of the pendulum detecting pendulum.
  • Figure 12 is a schematic diagram of the needle seat.
  • Fig. 13 is a schematic diagram of the operation sleeve.
  • Fig. 14 is a schematic sectional view of the operation sleeve.
  • Fig. 15 is a schematic diagram of the needle tube retreating into the locking connector.
  • Fig. 16 is a schematic diagram of the exit of the puncture needle tube assembly from the catheter base.
  • a card-locking needlestick-proof indwelling needle comprising a catheter assembly 1 and a puncture needle assembly 2, the catheter assembly includes a catheter base and a catheter connected thereto, the puncture needle assembly includes a needle assembly and Needle tip locking connector, the needle tube assembly includes a needle tube 2.1, an operation sleeve 2.9, a needle seat 2.10 and an exhaust plug 2.11, the needle tip locking connector includes a locking connector cover 2.2 and a locking connector mounting seat 2.3, in the locking connection
  • the head mounting seat is provided with a top pressure compression spring 2.4, a toggle block 2.5, a needle tube detection swing member 2.6 and a card locking piece 2.8.
  • the locking connection head mounting seat is a square open shell with a longitudinal An arc-shaped needle-passing groove for passing through the needle tube is provided in the middle part of the wall at both ends.
  • the toggle block is arranged along the side wall of the bottom of the housing, and a slider and a slider are used between the toggle block and the housing.
  • the pattern of the track reciprocates along the longitudinal direction of the bottom of the housing, and a top-pressing compression spring is arranged between the toggle block and one end wall of the housing. One end of the top-pressing compression spring is connected to the end wall of the housing. The other end of the compression spring is connected to the toggle block.
  • the needle tube detection swing member is an arc-shaped horn-shaped member, and a swing shaft is arranged on the needle tube detection swing member.
  • the swing shafts are respectively arranged on the two sides of the horn-shaped member.
  • the swing shaft on one side is supported on the locking connector installation seat, and the swing shaft on the other side is supported on the locking connector head cover.
  • the swing shaft deviates from the center of the horn-shaped member, and the horn-shaped
  • the components are divided into two sections, one long and one short on the left and right.
  • the long section is used as the needle tube detection arm, and the short section is used as the swing piece push arm.
  • the thickness of the needle tube detection arm parallel to the swing axis is greater than the corresponding thickness of the swing piece push arm, and the card locking piece is an elastic sheet.
  • a card hole for passing through the needle tube is provided on the sheet, at least one sharp non-chamfered edge is provided on the edge of the card hole, the upper end of the card lock piece is embedded in the second push groove of the toggle block, and the card lock piece
  • the lower part is positioned in the positioning groove on the lower side wall of the housing.
  • the card hole on the card locking piece is located on the line connecting the two needle grooves of the housing, that is, the longitudinal passage of the needle tube.
  • the locking connection head cover and the locking connection head installation seat are snap-fit connections, which are set at corresponding positions on the locking connection head cover.
  • the protrusion extends through the needle groove to the end of the tapered protrusion, the tapered protrusion matches the inner cavity of the catheter adapter, and a protrusion for facilitating the push handle is provided on the outer side of the locking connection cover.
  • the operating sleeve is set outside the needle point locking connector, one end of the operating sleeve is an open end, and the operating sleeve is inserted into the locking connector from the open end, the diameter of the other end of the operating sleeve is the same
  • the outer diameter of the small end of the needle seat matches the outer diameter of the small end of the needle seat, and the small end of the needle seat is embedded in the operation sleeve.
  • the needle seat is a stepped structure. There is an open blood return cavity in the cavity, and a needle insertion hole is set between the small end and the large end to connect the dispensing point and the blood return cavity.
  • the protrusion on the locking connection cover used as a push handle is exposed to the operation sleeve, and the needle tube
  • the tail end is set in the needle insertion hole of the needle holder, and the needle tube passes through the inner cavity of the small end of the needle holder, through the locking connector mounting seat and the needle passage groove of the locking connector head cover, and the tapered protrusion of the locking connector head cover.
  • the needle tube After passing through the needle groove on the top, the needle tube passes through the card hole at the same time and is supported on the top surface of the needle tube detection arm of the needle tube detection swing member.
  • the needle tip is exposed at the end of the tube, and the exhaust plug is installed in the lumen of the large end of the needle hub.
  • the mounting seat of the locking connector is a rectangular open shell.
  • 2.3.4.1 2.3.4.6 the other end hole is used to pass through the pinhole 2.3.4.6.
  • Groove 2.3.1, and the upper spring installation semicircle groove 2.5.3 of the toggle block 2.5 form a spring installation cavity, and the semicircle arc chute 2.3.1 is used to install and accommodate the top pressure compression spring 2.4, and for toggle
  • the upper outer cylindrical guide surface 2.5.4 of the block 2.5 slides in it; on the side of the semicircular arc-shaped chute on the bottom surface of the casing, there are a plurality of horizontal needle retaining ribs 2.3 perpendicular to the bottom surface of the casing .4.2, 2.3.4.3, 2.3.4.4, 2.3.4.5, the pin retaining ribs are all reinforced by rib plates, and the pin retaining ribs are between 2.3.4.2 and 2.3.4.3, and between 2.3.4.4 and 2.3.4.5.
  • a needle retaining piece 2.3.4.7 connected with the rib plate and parallel to the bottom surface of the housing is provided near the needle retaining rib 2.3.4.3.
  • 2.3.4.4 and 2.3.4.5 are respectively provided with a support platform 2.3.4.8 at a certain distance below.
  • the needle piece, the end surface of the support platform and the semicircular needle holes at both ends of the housing together form a needle tube passing channel 2.3.4, which is used to restrain the excessive lateral swing of the needle tube;
  • the space between .4.3 is used as the installation position 2.3.2 of the needle tube detection swing part, which is used to install the needle tube detection swing part.
  • the shaft hole 2.3.2 of the swing part is set in the appropriate position of the space, and the needle retaining platform and the needle retaining rib 2.3 .
  • the space between 4.4 and 2.3.4.5 is used as the installation position 2.3.3 of the locking card and the righting elastic piece.
  • the locking connection head cover 2.2 is a rectangular cover similar to the shape of the installation seat.
  • a conical boss 2.2.1 is provided at one end of the cover.
  • a plurality of raised fitting ribs 2.2.8 are provided on the arc surface, and a raised push handle 2.2.7 vertical to the cover is provided on the back of the flange close to the end surface of the cover.
  • a shaft hole 2.2.2 is provided at the corresponding position of the shaft hole on the seat, and a cover fixing hook 2.2.3 is provided on both sides of the needle groove at both ends of the cover body.
  • Covering positioning notch 2.2.4 is used to position the positioning projection on the mounting seat when the mounting seat is closed.
  • the cover surface in the cover is also provided with a plane boss 2.2.5 to limit excessive lateral swing of the locking card.
  • the card locking piece has a metal sheet with a certain width and length. There is a card hole 2.8.2 on the sheet. Edges shall be sharp on at least one side without chamfers.
  • the toggle block 2.5 is a block with a certain width, length and thickness, and one side of the long and narrow side of the block is provided with a semi-arc inner groove 2.5.3 from the short and narrow end.
  • the remaining section is set as a semi-arc to guide the outer cylindrical surface 2.5.4, and the short narrow surface at the other end is set as the stop end 2.5.5, and a U-shaped card pushing groove 2.5.2 in the width direction is set at a certain distance from the stop end.
  • a swing member pushing groove 2.5.1 with a rectangular notch in the thickness direction at a certain distance.
  • the pendulum detection pendulum 2.6 is a similar two-horn-like decoration 2.6.1, the horns are connected to the bottom side by a certain thickness of ribs, and a swing shaft 2.6.4 is set at the bottom to connect the ribs.
  • the swing axis is a little shorter on the side of the lateral connecting rib, and the center of the swing axis deviates from the center of the bottom end of the ornament, forming the top of the horn and the center of the axis, one side is longer and the other is shorter, the long side is used as the needle tube detection arm 2.6. .2.
  • the needle holder 2.10 is a stepped revolving body made of transparent material. There is a certain depth needle tube fixing glue dispensing hole 2.10.2 in the middle of the small end, and an open blood return cavity 2.10.3 is set in the middle of the big end. A needle tube insertion hole 2.10.1 is set between the small end and the large end to connect the dispensing point and the blood return cavity.
  • the operation sleeve 2.9 is made of transparent material. It is a rectangular long shell, one of the two ends is open, and the other end is a conical cover, and a needle seat fixing hole 2.9 is opened in the middle of the cover. 2.
  • the operating pinch position 2.9.1 is arranged symmetrically on the outer surface of the shell.
  • the detection arm is no longer constrained by the needle tube and is in a free state
  • the push arm on the needle tube detection swing piece also loses the constraint on the hooking of the toggle block, and the toggle block slides along the direction of the elastic force under the action of the top pressure compression spring, and instead pushes through the toggle groove of the swing piece on the toggle block Push the arm to make the pendulum detection pendulum swing, and the detection arm tilts toward the longitudinal channel of the needle tube to block the channel.
  • the sliding block also presses and locks the long end of the card through the card toggle slot longitudinally, while the short end of the card is in the
  • the gap between the righting elastic part and the needle tube holder is restricted by longitudinal sliding, so that the locking card can only ride around the outer surface of the needle tube through the upper card hole, and tilts towards the axis of the needle tube, so that the sharp edges on both sides of the card hole on the card, among which The upper edge of one side edge and the lower edge of the other side pinch the outer surface of the needle tube tightly and pin the needle tube, so that the needle tip of the needle tube is locked between the needle tube detection arm and the locking card, and the needle tube can no longer go forward relative to the locking connector
  • the purpose of wrapping the needle point and preventing the needle point from hurting people is achieved.
  • the locking member of the locking connector is assembled, and the top pressure compression spring 2.4 and the toggle block 2.5 are first installed and locked with the inner circular arc chute 2.3 of the connector mounting seat 2.3 .1
  • the upper outer circular arc guide surface 2.5.4 of the toggle block 2.5 fits with the inner arc chute 2.3.1 of the locking connector mounting seat 2.3, and presses the compression spring 2.4
  • the outer surface and the upper inner circle of the toggle block 2.5 The arc groove 2.5.3 fits together, with one end abutting against the inner end surface of the locking connector installation seat 2.3, and the other end abutting against the bottom of the inner arc groove on the toggle block 2.5.
  • the needle tube detection swing part 2.3.2 into the needle tube detection swing part installation position 2.3.2 on the mounting base 2.3, insert the long axis end of the swing part into the upper shaft hole 2.3.2.1 of the mounting base 2.3, push the needle tube detection swing part 2.6 to push the arm 2.6. It is embedded in the first push groove 2.5.1, which is the first push groove 2.5.1, which is the first push groove 2.5. At this time, the toggle block 2.5 is affected by the elastic force of the top pressure compression spring 2.4, and the toggle block 2.5 slides to its upper stop end 2.5.
  • the card toggle groove 2.5.2 is also in the pushing and pushing state, so that the needle tube detection arm 2.6.3 on the needle tube detection swing member 2.6 swings into the needle tube longitudinal passageway to block the passageway, and the locking card 2.8 is also tilted, its The axis of the upper clamping hole intersects with the longitudinal passage of the needle tube.
  • the tail end of the needle tube away from the needle tip is inserted semicircularly from the mounting base 2.3 through the needle hole 2.3.4.1 into the longitudinal channel of the needle tube, and then through the card hole 2.8.2 on the locking card, and semicircularly from the mounting base Go out through the needle hole 2.3.4.6 and go out to expose a certain length of needle tube.
  • the toggle block slides under the spring action of the top pressure compression spring, but the side wall of the pushing groove of the upper swinging part hits the pushing arm of the needle tube detection swinging part, driving the needle tube detection swing
  • the detection arm of the needle tube swings towards the needle tube, and the top surface of the detection arm is against the needle tube, which constrains the swinging part to continue to swing.
  • the pushing arm of the swinging part hooks the toggle part in turn, preventing the toggle part from continuing to slide, so that the needle tube detection arm If there is needle contact on the top surface, the toggle piece is stationary, and without needle contact, the needle tube detects that the swing piece is not constrained to swing, and naturally the hooking stop on the toggle piece is released.
  • the toggle piece It can slide so as to touch the long end of the locking card, causing the card to swing and tilt.
  • the needle tube is inserted as above, the needle is in the state, so that the long end of the locking card is still in a free state from being pushed by the toggle member, and the needle tube and the locking hole on the locking card are also in a free contact state.
  • the locking connection head cover 2.2 with a tapered boss towards the upper semicircle of the mounting seat and pass through the side of the pinhole 2.3.4.1, and hook it up with the mounting seat to fix the cover, and insert the short shaft end of the needle tube detection swing part into the lock Connect the upper shaft hole 2.2.2 of the head cover 2.2, so far the assembly of the locking connector is completed.
  • the large port of the operation sleeve 2.9 is directed towards the tail end of the needle tube, and the locking connector is inserted into the inner cavity of the operation sleeve until it cannot be further advanced, and the tail end of the needle tube exposes the socket socket hole 2.9.2 on the operation sleeve.

Abstract

一种卡片锁止式防针刺伤留置针，通过设置针尖锁定连接头，利用针尖锁定连接头内的拨动块（2.5）、针管检测摆动件（2.6）及卡片锁止片（2.8），实现将针管（2.1）针尖锁定在针管检测臂（2.6.3）与锁定卡片之间，针管（2.1）相对于针尖锁定连接头无法再往前往后滑动，达到了包裹针尖，防止针尖伤人目的。

Description

一种卡片锁止式防针刺伤留置针 技术领域
本发明涉及一种留置针，特别是一种卡片锁止式防针刺伤留置针。
背景技术
在现有临床医疗上使用的防针刺伤留置针，有采用一种包裹针尖的方式进行，针管采取靠近针尖一定距离位置将针管压扁构成一宽度大过针管外径凸起，或靠近针尖一定距离位置将针管分成两段，针尖段采用外径大于针管段外径方式焊接而成构成凸起，再配上有一定长度足够包裹从凸起到针尖的合拢式五金簧片，簧片另一头设有比针管外径稍大但小于凸起宽度的过针孔，设有过针孔一端装配于远离针尖凸起一侧，这样在穿刺完成撤针，针管撤至针管上凸起与过针孔相抵卡住，簧片另一端正好合拢包住针尖。这种方式防针刺伤最大不足是压扁凸起构造会令针管内通道变得狭窄，尤其是小规格针管更是，使得穿刺时回血缓慢，观察等待时间延长，另一种分段焊接凸起构造针管制造困难，成本高。
发明内容
本发明的目的在于克服现有技术的不足之处，而提供一种无需对针管作特殊处理的，就可防止针尖外穿伤人的卡片锁止式防针刺伤留置针。
一种卡片锁止式防针刺伤留置针，包括有导管组件及穿刺针管组件，所述的导管组件包括有导管座和与其相连的导管，其特征在于：所述的穿刺针管组件包括有针管组件和针尖锁定连接头，所述的针管组件包括有针管、操作套、针座及排气塞，针尖锁定连接头包含有锁定连接头盖及锁定连接头安装座，在锁定连接头安装座内设置有顶压压缩弹簧、拨动块、针管检测摆动件及卡片锁止片，所述的锁定连接头安装座为一种方形敞口壳体，在壳体纵向两端壁中部各设一个用于穿过针管的弧形的过针凹槽，所述的拨动块沿着壳体底部的一侧壁设置，拨动块与壳体之间采用滑块与轨道的模式沿着壳体底部的纵长方向做往复运动，在拨动块与壳体的一端壁之间设置有顶压压缩弹簧，顶压压缩弹簧的一端连接于壳体的端壁，顶压压缩弹簧的另一端连接于拨 动块，在拨动块面向壳体敞口侧的那一面上设置有一个用于容纳针管检测摆动件推动臂的第一推动槽，在拨动块朝向壳体另一侧壁的那一面上设置有一个用于容纳卡片锁止片的第二推动槽，针管检测摆动件为一种弧形的犄角状构件，在针管检测摆动件上设置有摆动轴，摆动轴分设于犄角状构件的两侧面，一侧的摆动轴支撑于锁定连接头安装座，另一侧的摆动轴支撑于锁定连接头盖，摆动轴偏离犄角状构件的中心部位，将犄角状构件分成左右一长一短两段，长段作为针管检测臂，短段作为摆动件推动臂，针管检测臂平行摆动轴方向的厚度大于摆动件推动臂的相应厚度，卡片锁止片为弹性薄片，在薄片上设置有一用于穿过针管的卡孔，卡孔边缘至少设置有一处的锐利无倒角，卡片锁止片上端嵌入到拨动块的第二推动槽中，卡片锁止片的下部定位于壳体下侧壁的定位槽中，卡片锁止片上的卡孔处于壳体两过针凹槽的连线即针管纵向穿行通道上，针管检测摆动件的针管检测臂在锁定连接头内没有针管时摆进壳体针管纵向穿行通道阻断针管纵向穿行通道，所述的锁定连接头盖与锁定连接头安装座之间为卡扣式连接，在锁定连接头盖上相应位置处设置有与锁定连接头安装座上的过针凹槽相匹配的过针凹槽，在锁定连接头盖的一端部的过针凹槽处设置有沿着壳体纵长方向向外延伸的锥状凸起，过针凹槽延伸到锥状凸起的未端，所述的锥状凸起与导管座内腔相匹配，在锁定连接盖的外侧上还设置有方便推手的凸起，所述的操作套套在针尖锁定连接头外，操作套的一端为敞口端，所述的操作套由敞口端套入到锁定连接头，操作套的另一端的口径与针座的小头端外径相匹配，针座的小头端嵌入到操作套内，所述的针座为一阶梯状构体，小端内腔设有一定深度针管固接点胶穴，大端内腔设一开口回血空腔，在小端与大端之间设一针管插针孔用于联通点胶穴与回血腔，锁定连接盖上的用于充当推手的凸起外露于操作套，针管尾端设置于针座的针管插针孔中，针管穿过针座的小端内腔、穿过锁定连接头安装座及锁定连接头盖的过针凹槽、锁定连接头盖的锥状凸起上的过针凹槽后由导管穿出，针管同时穿过卡片锁止片上的卡孔并支撑在针管检测摆动件的针管检测臂的顶面，针尖外露于导管未端，排气塞安装于针座的大端内腔。
本发明的卡片锁止式防针刺伤留置针，留置针在穿刺置管成功后，操作手的食指抵住锁定连接头上推手，拇指与中指捏持夹住操作套，往远离导管方向拉动操作套，固接其上的穿刺针管撤出导管组件，针管针尖退入锁定连接头，当针管继续退入，针尖一旦滑过针管检测摆动件上检测臂顶面，检测臂不再受到针管约束，呈自由状态， 同时针管检测摆动件上推动臂亦失去对拨动块勾接约束，拨动块在顶压压缩弹簧弹开作用下顺着弹力方向滑移，反而通过拨动块上摆动件拨动槽推动推动臂，令针管检测摆动件发生摆动，针管检测臂翘向针管纵向穿行通道，阻断通道，同时拨动块滑移亦通过第二推动槽纵向顶压卡片锁止片，由于卡片锁止片下部定位槽的定位制约无法滑移，令卡片锁止片只能通过其上卡孔骑绕针管外表面，往针管轴线倾斜，使得卡片上卡孔侧的锐利边缘，紧紧得掐住针管外表面，别住针管，这样针管针尖被锁定在针管检测臂与锁定卡片之间，针管相对于锁定连接头无法再往前往后滑动，达到了包裹针尖，防止针尖伤人目的。当针管被锁定后，由于卡孔边缘掐住针管的摩擦力远大于导管座与锁定连接头之间的插接配合摩擦力，继续拉动操作套，通过被锁定的针管带动连接头脱离导管座，如此穿刺撤针操作完成。
在锁定连接头盖的锥状凸起的外侧设置有一弧形的凸缘，该弧形凸缘与导管座外周相配合。
在锁定连接头盖上增设弧形凸缘，将导管座安装于弧形凸缘与锥状凸起之间，可起到支撑导管座的作用。
在锁定连接头盖的弧形凸缘与导管座相接触的内侧面上设置有增强两者配合的凸筋。
设置凸筋可提高弧形凸缘的支撑强度及与导管座的配合度。
在锁定连接头盖的内侧设置有用于限定卡片锁止片横向过多偏移的限位凸台。
所述的卡片锁止片在壳体下侧壁的定位槽中的定位为将卡片锁止片插入到定位槽后，用弹性块充当定位块进行定位。
将卡片锁止片插入到定位槽后，卡片锁止片与定位槽之间的间隙塞入弹性块进行定位，将卡片锁止片与定位槽之间采用这种连接模式，使得两者之间实际上为一种软连接，避免硬连接造成卡片损坏。
所述的壳体下侧壁的定位槽或为在壳体下侧壁设置两间隔排列的向着壳体上侧壁延伸的定位凸起，两凸起之间的间隔即为定位槽；或为在壳体下侧壁设置一个向着壳体上侧壁延伸的定位凸起，在凸起的上部开设一个凹槽，定位凸起的顶部位于壳体内针管纵向穿行通道的下边沿起到支撑针管的作用。
在壳体内针管纵向穿行通道的上边沿间隔设置有多个的挡针筋，所述的挡针筋垂直壳体底面。
所述的定位凸起的上端面或为平面，或为凸筋，所述的凸筋平行于挡针筋。
在针管纵向穿行通道靠近锁定连接头盖的那一侧还设置有挡针片，所述的挡针片平行于壳体底面。
所述的挡针片设置于挡针筋上。
设置挡针筋，挡针片可提高针管的穿行定位性。
所述的拨动块与壳体之间的滑块与轨道的具体结构为在拨动块与壳体接触的那个接触面设置一段的弧形外柱面、其余部分设置成弧形内凹槽面，在壳体与拨动块相接触的那个面设置有与拨动块上的弧形外柱面相配合使用的滑槽，弧形外柱面在滑槽内的滑动，另一段的弧形内凹槽与壳体上的滑槽构成安装顶压压缩弹簧的空腔。
在拨动块的第二推动槽的那一端的端面设置成弧形的止动端。
综上所述的，本发明相比现有技术如下优点：
本发明的卡片锁止式防针刺伤留置针，由于在置管完毕后，在往外撤出针管时，针管针尖陆续退出导管组件、退入锁定连接头，在针尖锁定连接头内，由于拨动块、针管检测摆动件及卡片锁止片的共同作用，使得针管被卡在卡片锁止片的卡孔内，这样针管针尖被锁定在针管检测臂与锁定卡片之间，针管相对于锁定连接头无法再往前往后滑动，达到了包裹针尖，防止针尖伤人目的。当针管被锁定后，由于卡孔两侧边缘掐住针管的摩擦力远大于导管座与锁定连接头之间的插接配合摩擦力，继续拉动操作套，通过被锁定的针管带动锁定连接头脱离导管座，实现撤针，这种卡片锁止式防针刺伤留置针，无需对针管进行特别的改造，就可实现将使用后的针尖牢牢的封闭在锁定连接内，避免了伤人的情况发生。
附图说明
图1是本发明的卡片锁止式防针刺伤留置针示意图。
图2是本发明的卡片锁止式防针刺伤留置针局部剖视示意图。
图3是锁定连接头安装座示意图。
图4是锁定连接头安装座的局部示意图。
图5是锁定连接头盖示意图。
图6是锁定连接头盖另一角度示意图。
图7是卡片锁止片示意图。
图8是拨动块示意图。
图9是拨动块另一角度示意图。
图10是针管检测摆动件示意图。
图11是针管检测摆动件另一角度示意图。
图12是针座示意图。
图13是操作套示意图。
图14是操作套剖视示意图。
图15是针管退入锁定连接头示意图。
图16穿刺针管组件退出导管座示意图。
具体实施方式
下面结合实施例对本发明进行更详细的描述。
实施例1
一种卡片锁止式防针刺伤留置针，包括有导管组件1及穿刺针管组件2，所述的导管组件包括有导管座和与其相连的导管，所述的穿刺针管组件包括有针管组件和针尖锁定连接头，所述的针管组件包括有针管2.1、操作套2.9、针座2.10及排气塞2.11，针尖锁定连接头包含有锁定连接头盖2.2及锁定连接头安装座2.3，在锁定连接头安装座内设置有顶压压缩弹簧2.4、拨动块2.5、针管检测摆动件2.6及卡片锁止片2.8，所述的锁定连接头安装座为一种方形敞口壳体，在壳体纵向两端壁中部各设一个用于穿过针管的弧形的过针凹槽，所述的拨动块沿着壳体底部的一侧壁设置，拨动块与壳体之间采用滑块与轨道的模式沿着壳体底部的纵长方向做往复运动，在拨动块与壳体的一端壁之间设置有顶压压缩弹簧，顶压压缩弹簧的一端连接于壳体的端壁，顶压压缩弹簧的另一端连接于拨动块，在拨动块面向壳体敞口侧的那一面上设置有一个用于容纳针管检测摆动件推动臂的第一推动槽，在拨动块朝向壳体另一侧壁的那一面上设置有一个用于容纳卡片锁止片的第二推动槽，针管检测摆动件为一种弧形的犄角状构件，在针管检测摆动件上设置有摆动轴，摆动轴分设于犄角状构件的两侧面，一侧的摆动轴支撑于锁定连接头安装座，另一侧的摆动轴支撑于锁定连接头盖，摆动轴偏离 犄角状构件的中心部位，将犄角状构件分成左右一长一短两段，长段作为针管检测臂，短段作为摆动件推动臂，针管检测臂平行摆动轴方向的厚度大于摆动件推动臂的相应厚度，卡片锁止片为弹性薄片，在薄片上设置有一用于穿过针管的卡孔，卡孔边缘至少设置有一处的锐利无倒角，卡片锁止片上端嵌入到拨动块的第二推动槽中，卡片锁止片的下部定位于壳体下侧壁的定位槽中，卡片锁止片上的卡孔处于壳体两过针凹槽的连线即针管纵向穿行通道上，针管检测摆动件的针管检测臂在锁定连接头内没有针管时摆进壳体针管纵向穿行通道阻断针管纵向穿行通道，所述的锁定连接头盖与锁定连接头安装座之间为卡扣式连接，在锁定连接头盖上相应位置处设置有与锁定连接头安装座上的过针凹槽相匹配的过针凹槽，在锁定连接头盖的一端部的过针凹槽处设置有沿着壳体纵长方向向外延伸的锥状凸起，过针凹槽延伸到锥状凸起的未端，所述的锥状凸起与导管座内腔相匹配，在锁定连接盖的外侧上还设置有方便推手的凸起，所述的操作套套在针尖锁定连接头外，操作套的一端为敞口端，所述的操作套由敞口端套入到锁定连接头，操作套的另一端的口径与针座的小头端外径相匹配，针座的小头端嵌入到操作套内，所述的针座为一阶梯状构体，小端内腔设有一定深度针管固接点胶穴，大端内腔设一开口回血空腔，在小端与大端之间设一针管插针孔用于联通点胶穴与回血腔，锁定连接盖上的用于充当推手的凸起外露于操作套，针管尾端设置于针座的针管插针孔中，针管穿过针座的小端内腔、穿过锁定连接头安装座及锁定连接头盖的过针凹槽、锁定连接头盖的锥状凸起上的过针凹槽后由导管穿出，针管同时穿过卡片锁止片上的卡孔并支撑在针管检测摆动件的针管检测臂的顶面，针尖外露于导管未端，排气塞安装于针座的大端内腔。
如图3、4，锁定连接头安装座是一矩形敞口壳体，壳体纵向两端壁中间各设一个开口半圆形过针孔，其中一端孔作为针管穿入过针孔2.3.4.1，另一端孔作为穿出过针孔2.3.4.6，在过针孔两侧各设有盖合定位凸起及凸缘；在壳体底部紧贴壳体长侧壁内侧设有一半圆弧形滑槽2.3.1，与拨动块2.5上弹簧安装半圆弧凹槽2.5.3构成一弹簧安装腔位，半圆弧形滑槽2.3.1用于安装容纳顶压压缩弹簧2.4，并供拨动块2.5上外圆柱导向面2.5.4在其内滑移；在壳体底面半圆弧形滑槽边缘靠向壳体中心面一侧设有复数个垂直于壳体底面的横向挡针筋条2.3.4.2、2.3.4.3、2.3.4.4、2.3.4.5，挡针筋皆通过筋板增强刚性，其中挡针筋条2.3.4.2与2.3.4.3之间、2.3.4.4与2.3.4.5之间具有一定距离断开空间，供针管检测摆动臂和锁定卡片在此 间活动；在挡针筋2.3.4.3附近设一与筋板相连并平行于壳体底面的挡针片2.3.4.7，在挡针筋2.3.4.4和2.3.4.5下方一定距离各设有一托台2.3.4.8，托台朝向挡针筋端面可以是平面，也可以是一种与挡针筋平行的凸筋；由挡针筋、挡针片、托台端面以及壳体两端半圆形过针孔共同构成一针管穿行通道2.3.4，用于约束针管横向过多摆动；在挡针托台与挡针筋2.3.4.2、2.3.4.3之间空位作为安装针管检测摆动件安装位2.3.2，用于安装针管检测摆动件，在空位适当位置设置设有摆动件轴孔2.3.2，在挡针托台与挡针筋2.3.4.4、2.3.4.5之间空位作为锁定卡片及扶正弹性件的安装位2.3.3。
如图5、6锁定连接头盖2.2是一与安装座外形相仿的矩形盖体，在盖体一端设有锥形凸台2.2.1，凸台外观大小可以与导管座内腔插接，沿锥形凸台中心线开设有U形过针槽2.2.6，槽口背向盖体盖面，贯穿盖体两端面，在距离凸台一定距离设有一定宽度内弧形凸缘，凸缘圆弧面设有复数条凸起配合筋2.2.8，在凸缘背面靠近盖体端面处设有垂直盖面的凸起推手2.2.7，在盖顶上与安装座盖合后，与安装座上轴孔相对应处设有一轴孔2.2.2，在盖体两端过针槽两侧各设有盖合固定钩2.2.3，在盖体两端内侧壁设有一定宽度和深度的盖合定位缺口2.2.4，用于同安装座盖合时定位安装座上定位凸起，盖体内盖面还设有平面凸台2.2.5，用于限制锁定卡片横向过多摆动。
如图7卡片锁止片一具有一定宽度和长度五金薄片，薄片上开有卡孔2.8.2，卡孔中心偏向一端，构成卡片短端2.8.1和长端2.8.3，卡孔两侧边缘至少有一侧锐利无倒角。
如图8、9拨动块2.5是一具有一定宽度、长度和厚度的块状体，在块体长窄面其中一侧设有从短窄端起一段半弧形内凹槽2.5.3，余下一段设成半弧形导向外柱面2.5.4，另一端短窄面设成止动端2.5.5，在距离止动端一定距离位置设一宽度方向U形卡片推动槽2.5.2，紧接U形槽一定距离设有厚度方向矩形缺口的摆动件推动槽2.5.1。
如图10、11针管检测摆动件2.6是一类似两犄角样摆件2.6.1，犄角侧向与底端通过一定壁厚筋连成一体，在底端连接筋壁设一摆动轴2.6.4，摆动轴在侧向连接筋一侧短一点，摆动轴中心偏离摆件底端中心，形成犄角顶端与轴中心一边长一边短，长边作为针管检测臂2.6.3，短边作为摆动件推动臂2.6.2。
如图12针座2.10是一阶梯形回转体，由透明材料制成，小端头中间设有一定深度针管固接点胶穴2.10.2，大端中间设一开口回血空腔2.10.3，在小端与大端之间设一针管插针孔2.10.1，联通点胶穴与回血腔。
如图13、14操作套2.9是由透明材料制成，是一矩形长壳体，两端面其中一端开口，另一端是一锥面封盖，封盖正中间开设一针座固接孔2.9.2，在壳体外表对称设有操作捏持位2.9.1。
如图15、16是留置针在穿刺置管成功后，操作手的食指抵住锁定连接头上推手，拇指与中指捏持夹住操作套捏持位，往远离导管方向拉动操作套，而固接其上的穿刺针管撤出导管组件，针管针尖退入锁定连接头，当针管继续退入，针尖一旦滑过针管检测摆动件上检测臂顶面，检测臂不再受到针管约束，呈自由状态，同时针管检测摆动件上推动臂亦失去对拨动块勾接约束，拨动块在顶压压缩弹簧弹开作用下顺着弹力方向滑移，反而通过拨动块上摆动件拨动槽推动推动臂，令针管检测摆动件发生摆动，检测臂翘向针管纵向穿行通道，阻断通道，同时拨动块滑移亦通过卡片拨动槽纵向顶压锁定卡片长端，而卡片短端却在扶正弹性件与针管托台缝隙中受到纵向滑移制约无法滑移，令锁定卡片只能通过其上卡孔骑绕针管外表面，往针管轴线倾斜，使得卡片上卡孔两侧锐利边缘，其中一侧边缘上缘和另一侧边缘下缘紧紧得掐住针管外表面，别住针管，这样针管针尖被锁定在针管检测臂与锁定卡片之间，针管相对于锁定连接头无法再往前往后滑动，达到了包裹针尖，防止针尖伤人目的。当针管被锁定后，由于卡孔两侧边缘掐住针管的摩擦力远大于导管座与锁定连接头之间的插接配合摩擦力，继续拉动操作套，通过被锁定的针管带动连接头脱离导管座，如此穿刺撤针操作完成。
本发明的卡片锁止式防针刺伤留置针在装配时，锁定连接头锁定构件装配，先将顶压压缩弹簧2.4和拨动块2.5安装与锁定连接头安装座2.3内圆弧滑槽2.3.1内，拨动块2.5上外圆弧导向面2.5.4与锁定连接头安装座2.3内圆弧滑槽2.3.1贴合，顶压压缩弹簧2.4外表面与拨动块2.5上内圆弧槽2.5.3贴合，一端抵在锁定连接头安装座2.3内端面，另一端抵在拨动块2.5上内圆弧槽底。接着在锁定卡片安装位2.3.3下段压入锁定卡片扶正弹性件2.7，再嵌入锁定卡片2.8，卡片长端端头2.8.3安装于拨动块2.5上卡片拨动槽即第二推动槽2.5.2内，短端2.8.1压入扶正弹性件2.7与靠近安装座2.3端部的针管托台2.3.4.8之间夹缝中，同时令卡片上卡孔2.8.2处 于安装座2.3内各挡针筋条、托台及挡片构成的针管纵向穿行通道内。再接着在安装座2.3上针管检测摆动件安装位2.3.2插入针管检测摆动件2.6，摆动件长轴端插入安装座2.3上轴孔2.3.2.1，针管检测摆动件2.6上推动臂2.6.2嵌入拨动块2.5上摆动件推动槽即第一推动槽2.5.1内。此时拨动块2.5受到顶压压缩弹簧2.4弹开弹力作用，拨动块2.5滑移至其上止动端2.5.5与安装座2.3内端面相抵，其上检测摆动件推动槽2.5.1和卡片拨动槽2.5.2亦处于拨动推止状态，令针管检测摆动件2.6上针管检测臂2.6.3摆进针管纵向穿行通道，阻断穿行通道，而且锁定卡片2.8亦处于倾斜，其上卡孔轴线与针管纵向穿行通道成交叉状态。
穿刺针管组件装配，在上述装配完成后，首先推动拨动块2.5，压缩顶压压缩弹簧2.4，带动针管检测摆动件2.6上针管检测臂2.6.3摆离针管纵向穿行通道，同时卡片长端端头2.8.3不再受到拨动块2.5上卡片拨动槽2.5.2推压，处于自由状态，在扶正弹性件2.7弹性作用下，锁定卡片复位摆正，其上卡孔轴线与针管穿行通道纵向平行，保持拨动块2.5这种状态不动。然后将针管远离针尖的尾端从安装座2.3上半圆形穿入过针孔2.3.4.1穿入针管纵向穿行通道，接着穿过锁定卡片上卡孔2.8.2，从安装座上半圆形穿出过针孔2.3.4.6穿出，露出一定长度针管。针管穿出后，放开推压拨动块，拨动块在顶压压缩弹簧弹开作用下滑移，然而其上摆动件推动槽侧壁碰抵针管检测摆动件推动臂，带动针管检测摆动件针管检测臂摆向针管，检测臂顶面与针管相抵，约束了摆动件继续摆动，这时摆动件推动臂反过来勾住拨动件，制止了拨动件继续滑移，如此针管检测臂顶面有针接触，拨动件静止不动，无针接触，针管检测摆动件摆动就不受约束，自然亦解除了对拨动件勾住止动，在压缩弹簧弹力作用下，拨动件能够滑动，从而与锁定卡片长端碰触，带动卡片摆动倾斜。如上述插入针管后，有针状态，使得锁定卡片长端仍然处于不受拨动件推压自由状态，针管与锁定卡片上卡孔亦处于自由接触状态。将锁定连接头盖2.2具锥形凸台一端朝向安装座上半圆形穿入过针孔2.3.4.1一侧，与安装座定位勾接固定盖合，针管检测摆动件短轴端亦插入锁定连接头盖2.2上轴孔2.2.2，至此锁定连接头装配完成。接着将操作套2.9大端口朝向针管尾端，将锁定连接头插入操作套内腔至无法再进为止，针管尾端露出操作套上针座插接孔2.9.2。再接着将针管尾端插入针座插针孔2.10.1，至所需深度，与针座固接，再将针座小端插入操作套上针座插接孔2.9.2，至两者端面相抵后，固接两者插接，然后在针座回血仓开口端插上所需排气塞。最后，将所需导管组件套入 针管，锁定连接头上锥形凸台插入导管座内腔，导管座上外圆柱面与锁定连接头盖上配合凸筋2.2.8相卡接，针管尖端露出导管先端，至此装配完成。
本实施例未述部分与现有技术相同。

Claims (10)

  1. 一种卡片锁止式防针刺伤留置针，包括有导管组件及穿刺针管组件，所述的导管组件包括有导管座和与其相连的导管，其特征在于：所述的穿刺针管组件包括有针管组件和针尖锁定连接头，所述的针管组件包括有针管、操作套、针座及排气塞，针尖锁定连接头包含有锁定连接头盖及锁定连接头安装座，在锁定连接头安装座内设置有顶压压缩弹簧、拨动块、针管检测摆动件及卡片锁止片，所述的锁定连接头安装座为一种方形敞口壳体，在壳体纵向两端壁中部各设一个用于穿过针管的弧形的过针凹槽，所述的拨动块沿着壳体底部的一侧壁设置，拨动块与壳体之间采用滑块与轨道的模式沿着壳体底部的纵长方向做往复运动，在拨动块与壳体的一端壁之间设置有顶压压缩弹簧，顶压压缩弹簧的一端连接于壳体的端壁，顶压压缩弹簧的另一端连接于拨动块，在拨动块面向壳体敞口侧的那一面上设置有一个用于容纳针管检测摆动件推动臂的第一推动槽，在拨动块朝向壳体另一侧壁的那一面上设置有一个用于容纳卡片锁止片的第二推动槽，针管检测摆动件为一种弧形的犄角状构件，在针管检测摆动件上设置有摆动轴，摆动轴分设于犄角状构件的两侧面，一侧的摆动轴支撑于锁定连接头安装座，另一侧的摆动轴支撑于锁定连接头盖，摆动轴偏离犄角状构件的中心部位，将犄角状构件分成左右一长一短两段，长段作为针管检测臂，短段作为摆动件推动臂，针管检测臂平行摆动轴方向的厚度大于摆动件推动臂的相应厚度，卡片锁止片为弹性薄片，在薄片上设置有一用于穿过针管的卡孔，卡孔边缘至少设置有一处的锐利无倒角，卡片锁止片上端嵌入到拨动块的第二推动槽中，卡片锁止片的下部定位于壳体下侧壁的定位槽中，卡片锁止片上的卡孔处于壳体两过针凹槽的连线即针管纵向穿行通道上，针管检测摆动件的针管检测臂在锁定连接头内没有针管时摆进壳体针管纵向穿行通道阻断针管纵向穿行通道，所述的锁定连接头盖与锁定连接头安装座之间为卡扣式连接，在锁定连接头盖上相应位置处设置有与锁定连接头安装座上的过针凹槽相匹配的过针凹槽，在锁定连接头盖的一端部的过针凹槽处设置有沿着壳体纵长方向向外延伸的锥状凸起，过针凹槽延伸到锥状凸起的未端，所述的锥状凸起与导管座内腔相匹配，在锁定连接盖的外侧上还设置有方便推手的 凸起，所述的操作套套在针尖锁定连接头外，操作套的一端为敞口端，所述的操作套由敞口端套入到锁定连接头，操作套的另一端的口径与针座的小头端外径相匹配，针座的小头端嵌入到操作套内，所述的针座为一阶梯状构体，小端内腔设有一定深度针管固接点胶穴，大端内腔设一开口回血空腔，在小端与大端之间设一针管插针孔用于联通点胶穴与回血腔，锁定连接盖上的用于充当推手的凸起外露于操作套，针管尾端设置于针座的针管插针孔中，针管穿过针座的小端内腔、穿过锁定连接头安装座及锁定连接头盖的过针凹槽、锁定连接头盖的锥状凸起上的过针凹槽后由导管穿出，针管同时穿过卡片锁止片上的卡孔并支撑在针管检测摆动件的针管检测臂的顶面，针尖外露于导管未端，排气塞安装于针座的大端内腔。
  2. 根据权利要求1所述的卡片锁止式防针刺伤留置针，其特征在于：在锁定连接头盖的锥状凸起的外侧设置有一弧形的凸缘，该弧形凸缘与导管座外周相配合。
  3. 根据权利要求2所述的卡片锁止式防针刺伤留置针，其特征在于：在锁定连接头盖的弧形凸缘与导管座相接触的内侧面上设置有增强两者配合的凸筋。
  4. 根据权利要求3所述的卡片锁止式防针刺伤留置针，其特征在于：在锁定连接头盖的内侧设置有用于限定卡片锁止片横向过多偏移的限位凸台。
  5. 根据权利要求1至4任何一项所述的卡片锁止式防针刺伤留置针，其特征在于：所述的卡片锁止片在壳体下侧壁的定位槽中的定位为将卡片锁止片插入到定位槽后，用弹性块充当定位块进行定位。
  6. 根据权利要求5所述的卡片锁止式防针刺伤留置针，其特征在于：所述的壳体下侧壁的定位槽或为在壳体下侧壁设置两间隔排列的向着壳体上侧壁延伸的定位凸起，两凸起之间的间隔即为定位槽；或为在壳体下侧壁设置一个向着壳体上侧壁延伸的定位凸起，在凸起的上部开设一个凹槽，定位凸起的顶部位于壳体内针管纵向穿行通道的下边沿起到支撑针管的作用。
  7. 根据权利要求6所述的卡片锁止式防针刺伤留置针，其特征在于：在壳体内针管纵向穿行通道的上边沿间隔设置有多个的挡针筋，所述的挡针筋垂直壳体底面。
  8. 根据权利要求7所述的卡片锁止式防针刺伤留置针，其特征在于：在针管纵向穿行通道靠近锁定连接头盖的那一侧还设置有挡针片，所述的挡针片平行于壳体底面。
  9. 根据权利要求8所述的卡片锁止式防针刺伤留置针，其特征在于：所述的挡针片设置于挡针筋上。
  10. 根据权利要求1所述的卡片锁止式防针刺伤留置针，其特征在于：所述的拨动块与壳体之间的滑块与轨道的具体结构为在拨动块与壳体接触的那个接触面设置一段的弧形外柱面、其余部分设置成弧形内凹槽面，在壳体与拨动块相接触的那个面设置有与拨动块上的弧形外柱面相配合使用的滑槽，弧形外柱面在滑槽内的滑动，另一段的弧形内凹槽与壳体上的滑槽构成安装顶压压缩弹簧的空腔。
PCT/CN2021/102757 2021-06-28 2021-06-28 一种卡片锁止式防针刺伤留置针 WO2023272435A1 (zh)

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JP2007143828A (ja) * 2005-11-28 2007-06-14 Nippon Sherwood Medical Industries Ltd 留置針
CN101822858A (zh) * 2009-11-25 2010-09-08 上海普益医疗器械有限公司 一种防针刺伤留置针
US20110213307A1 (en) * 2008-10-03 2011-09-01 Nipro Corporation Needle tip protector and indwelling needle assembly
CN204121525U (zh) * 2014-09-05 2015-01-28 广东百合医疗科技股份有限公司 双安全型静脉留置针
CN209916919U (zh) * 2019-03-14 2020-01-10 江西丰临医用器械有限公司 留置针
CN213100049U (zh) * 2020-07-31 2021-05-04 天津迪玛克医药科技有限公司 一种防针刺伤静脉留置针

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007143828A (ja) * 2005-11-28 2007-06-14 Nippon Sherwood Medical Industries Ltd 留置針
US20110213307A1 (en) * 2008-10-03 2011-09-01 Nipro Corporation Needle tip protector and indwelling needle assembly
CN101822858A (zh) * 2009-11-25 2010-09-08 上海普益医疗器械有限公司 一种防针刺伤留置针
CN204121525U (zh) * 2014-09-05 2015-01-28 广东百合医疗科技股份有限公司 双安全型静脉留置针
CN209916919U (zh) * 2019-03-14 2020-01-10 江西丰临医用器械有限公司 留置针
CN213100049U (zh) * 2020-07-31 2021-05-04 天津迪玛克医药科技有限公司 一种防针刺伤静脉留置针

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