TWI640335B - Safety syringe - Google Patents

Safety syringe Download PDF

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Publication number
TWI640335B
TWI640335B TW105142782A TW105142782A TWI640335B TW I640335 B TWI640335 B TW I640335B TW 105142782 A TW105142782 A TW 105142782A TW 105142782 A TW105142782 A TW 105142782A TW I640335 B TWI640335 B TW I640335B
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Taiwan
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needle
hook
syringe
needle base
safety syringe
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TW105142782A
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TW201725058A (zh
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呂文進
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呂文進
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3232Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221Constructional features thereof, e.g. to improve manipulation or functioning
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M2005/31516Piston or piston-rod constructions, e.g. connection of piston with piston-rod reducing dead-space in the syringe barrel after delivery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M2005/3206Needle or needle hub disconnecting devices forming part of or being attached to the hub or syringe body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3223Means impeding or disabling repositioning of used needles at the syringe nozzle
    • A61M2005/3224Means to disalign the needle tip and syringe nozzle
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/323Connection between plunger distal end and needle hub proximal end, e.g. stud protruding from the plunger
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3231Proximal end of needle captured or embedded inside piston head, e.g. by friction or hooks
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/34Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/348Constructions for connecting the needle, e.g. to syringe nozzle or needle hub snap lock, i.e. upon axial displacement of needle assembly

Abstract

一種安全注射器,包含有一針筒,具有一筒身,一容室,一裝座孔,一卡座槽;一針座,具有一座身裝設於該針筒的裝座孔,一針孔,一勾桿,一連動變形部連接於該勾桿,及一卡筒部接於該連動變形部受其連動並可卡止於該針筒的卡座槽;一桿塞,具有一桿身,以及一插勾孔可套接該針座的勾桿並壓縮該連動變形部彈性變形使該針座的卡筒部不卡止於該針筒的卡座槽,該插勾孔可卡勾該針座的勾桿使移動該針座。

Description

安全注射器
本發明係與醫療器具有關,特別是指一種安全注射器。
習知安全注射器,如美國US20060106339公開專利,其仍有針座之固定及回拉不確實,以及葯液殘留量較多的問題。
因此,所述已知安全注射器的缺失仍然有待改進。
有鑑於此,本發明之主要目的在於提供一種安全注射器,其可穩固定位針座,方便快速回拉針座,並有效減少葯液的殘留者。
為達成上述目的,本發明即提供一種安全注射器,包含有一針筒,具有一筒身,一容室,一裝座孔,一卡座槽;一針座,具有一座身裝設於該針筒的裝座孔,一針孔,一勾桿,一連動變形部連接於該勾桿,及一卡筒部接於該連動變形部受其連動並可卡止於該針筒的卡座槽;一桿塞,具有一桿身,以及一插勾孔可套接該針座的勾桿並壓縮該連動變形部彈性變形使該針座的卡筒部不卡止於該針筒的卡座槽,該插勾孔可卡勾該針座的勾桿使移動該針座。
本發明安全注射器,利用該針座的連動變形部與該桿塞的插勾孔配合,以及該卡座槽與卡筒部的關係,可使針座回拉方便快速確實,並有效減少葯液的殘留。
較佳地,該針座具有一凹室相通該針孔與連動變形部。
較佳地,該針座具有一導流面相接於該凹室。
較佳地,該針座具有一內縮面對應該連動變形部。
較佳地,該針座中心線到勾桿外緣的垂直距離小於該針座中心線到連動變形部外緣的垂直距離。
較佳地,該卡筒部延伸一部分長度與該連動變形部相連接。
較佳地,其更包含一密封環設在該針筒與針座之間。
較佳地,該針筒具有一主筒及一前套套接於該主筒。
較佳地,其更包含一密封環設於該前套與針座的座身之間。
較佳地,該針筒具有一沉孔,該針座具有一座肩配合定位於該針筒的沉孔。
有關本發明所提供之安全注射器的詳細構造及特點,將於後續的實施方式中予以詳盡描述。然而,本技術領域中具有通常知識者理應瞭解,該等詳細說明以及實施本發明所列舉的特定實施例,僅用於說明本發明,並非用以限制本發明的專利申請範圍。
(1)‧‧‧針筒
(10)‧‧‧主筒
(11)‧‧‧筒身
(12)‧‧‧容室
(13)‧‧‧裝座孔
(14)‧‧‧卡座槽
(15)‧‧‧沉孔
(20)‧‧‧針座
(21)‧‧‧座身
(22)‧‧‧針孔
(23)‧‧‧座肩
(24)‧‧‧勾桿
(25)‧‧‧連動變形部
(26)‧‧‧卡筒部
(27)‧‧‧凹室
(28)‧‧‧環槽
(29)‧‧‧接針部
(3)‧‧‧桿塞
(30)‧‧‧推桿
(31)‧‧‧桿身
(40)‧‧‧封塞
(41)‧‧‧插勾孔
(50)‧‧‧前套
(211)‧‧‧內縮面
(212)‧‧‧導流面
(N)‧‧‧針頭
(N1)‧‧‧接件
(R)‧‧‧密封環
第1圖係本發明一較佳實施例的立體圖。
第2圖係本發明一較佳實施例的一操作狀態剖視圖。
第3圖係本發明一較佳實施例另一操作狀態剖視圖。
第4圖係本發明一較佳實施例針座的立體圖。
第5圖係本發明另一較佳實施例的立體圖。
第6圖係本發明另一較佳實施例的一操作狀態剖視圖。
第7圖係本發明另一較佳實施例另一操作狀態剖視圖。
第8圖係本發明另一較佳實施例針座的立體圖。
第9圖係本發明再一較佳實施例的立體圖。
第10圖係本發明再一較佳實施例的一操作狀態剖視圖。
第11圖係本發明再一較佳實施例另一操作狀態剖視圖。
第12圖係本發明再一較佳實施例針座的立體圖。
第13圖係本發明又一較佳實施例的立體圖。
第14圖係本發明又一較佳實施例的一操作狀態剖視圖。
第15圖係本發明又一較佳實施例另一操作狀態剖視圖。
第16圖係本發明又一較佳實施例針座的立體圖。
申請人首先在此說明,於通篇說明書中所指之內、外、上、下等有關方向性的形容詞,皆是以本發明圖式中的方向為基準。
以下將藉由所列舉之實施例配合隨附之圖式,詳細說明本發明的技術內容及特徵,其中:如第1圖至第4圖所示,本發明一較佳實施例之安全注射器,包含有:於本實施例中,該主筒(10)單獨即可構成一針筒(1);即,廣義而言,本發明安全注射器包含有一針筒(1),該針筒(1)具有一主筒(10)。
該主筒(10)具有一筒身(11),一容室(12)連通一裝座孔(13),一卡座槽(14)位於該裝座孔(13)的內緣,一沉孔(15)在該容室(12)與卡座槽(14)之間。
一針座(20),具有一座身(21)裝設於該主筒(10)的裝座孔(13),一針孔(22),一座肩(23)配合定位於該針筒(1)的沉孔(15),一勾桿(24)其桿身較佳略呈錐形,一連動變形部(25)呈凸弧形片狀連接於該勾桿(24),以及一卡筒部(26)接於該連動變形部(25)受其連動並可卡止於該針筒(1)的卡 座槽(14)。
該針座(20)還具有一內縮面(211)對應配合該連動變形部(25);即,該座身(21)及/或勾桿(24)對應該連動變形部(25)處係形成略成削除之表面,以提供該連動變形部(25)更多變形空間。
其中,該針座(20)還具有一凹室(27)開通於該針孔(22)與連動變形部(25)之間,該針座(20)還具有一環槽(28)可供裝設一密封環(R)密封該針筒(1)與針座(20)之間。
該針座(20)還具有一導流面(212)相接於該凹室(27),該導流面(212)也相接於該內縮面(211),其可使葯液更容易流到該凹室(27)。
此外,該卡筒部(26)的另端還連接於其座身(21)。
於本實施例中,該針座(20)係在其針孔(22)直接裝設一針頭(N)。
本實施例中,該針座(20)中心線到勾桿(24)外緣的垂直距離(L1)小於該針座(20)中心線到連動變形部(25)外緣的垂直距離(L2)。
一桿塞(3),具有一推桿(30)有一桿身(31),以及一封塞(40)接設於該推桿(30)之桿身(31)。
該封塞(40)具有一插勾孔(41)可套接該針座(20)的勾桿(24)並壓縮該連動變形部(25)彈性變形使該針座(20)的卡筒部(26)不卡止於該針筒(1)的卡座槽(14),該插勾孔(41)可卡勾該針座(20)的勾桿(24)使移動該針座(20)。
該針座(20)的卡筒部(26)與針筒(1)的卡座槽(14)可有效卡合。
而當該桿塞(3)向前推抵使其封塞(40)的插勾孔(41)套入該針座(20)的勾桿(24)與連動變形部(25)時,即可控制該針座(20)的卡筒部(26)離開該針筒(1)的卡座槽(14)而不再卡合,即可順利回拉。該連動變形部(25)彈性 變形時與該座身(21)及勾桿(24)間的空隙變小,則可減少其間的葯液殘留。
最後,該針座(20)與針頭(N)也因該針座(20)的連動變形部(25)與該桿塞(3)的插勾孔(41)之配合關係而歪斜向一側,該針座(20)與針頭(N)即不容易再被推出該針筒(1)。
藉此,該實施例即達成本發明之目的。
而本發明的重點更在於,藉由該針座(20)的連動變形部(25)與凹室(27)配合,其設計還可有效減少注射藥液殘留量。
如第5圖至第8圖所示,本發明提供一種使用所述安全注射器,係與前述實施例大致相同,其主要不同點在於:該針座(20)還具有一接針部(29)形成在前段。
該針頭(N)係設於一接件(N1),該接件(N1)再接設於該針座(20)的接針部(29)。
藉此,該實施例同樣可以達成本發明之目的。
如第9圖至第12圖所示,本發明另一較佳實施例之安全注射器,係與前述實施例大致相同,其主要不同點在於: 該針筒(1)具有一主筒(10)及一前套(50)可密封地套接於該主筒(10)共同形成該裝座孔(13),該密封環(R)設於該前套(50)與針座(20)的座身(21)之間。
即,該主筒(10)還具有一前套(50)套接於該主筒(10)前端,本例中該卡座槽(14)及沉孔(15)係形成在主筒(10),當然也可改為形成在該前套(50)。利用兩個構件組合而成,其可使針筒(1)的製造更為簡單,且使增加其使用態樣。
藉此,該實施例同樣可以達成本發明之目的。
如第13圖至第16圖所示,本發明另一較佳實施例之安全注 射器,係與前述實施例大致相同,其主要不同點在於:該針座(20)係較大尺寸而另形成一外筒部供裝設該針頭(N)。
該卡筒部(26)可延伸一部分長度再與該連動變形部(25)相連接。因此,仍能以該封塞(40)之插勾孔(41)壓縮該針座(20)的連動變形部(25)彈性變形,而以帶動該卡筒部(26)卡合與不卡合。
藉此,該實施例同樣可以達成本發明之目的。
本發明該推桿(30)與封塞(40)可為組合的之外,或也可為一體的。
本發明該密封環(R)除了如前述為獨立構件之外,其也可為一體成形於該針筒(1)或一體成形於該針座(20)。
以上所述的任何實施態樣均可一者或多者互相搭配使用,均可達成本發明之目的。
綜合前述,本發明安全注射器其確實可穩固定位針座,方便快速回拉針座,並有效減少葯液的殘留,因此確實達成本發明之目的。

Claims (10)

  1. 一種安全注射器,包含有:一針筒(1),具有一筒身(11),一容室(12),一裝座孔(13),一卡座槽(14);一針座(20),具有一座身(21)裝設於該針筒(1)的裝座孔(13),一針孔(22),一勾桿(24),一連動變形部(25)連接於該勾桿(24),及一卡筒部(26)一端一體接於該連動變形部(25)受其連動並可卡止於該針筒(1)的卡座槽(14);此外,該卡筒部(26)另一端一體連接於該座身(21);一桿塞(3),具有一桿身(31),以及一插勾孔(41)可套接該針座(20)的勾桿(24)並壓縮該連動變形部(25)彈性變形使該針座(20)的卡筒部(26)不卡止於該針筒(1)的卡座槽(14),該插勾孔(41)可卡勾該針座(20)的勾桿(24)使移動該針座(20)。
  2. 如請求項1所述的安全注射器,其中該針座(20)具有一凹室(27)相通該針孔(22)與連動變形部(25)。
  3. 如請求項2所述的安全注射器,其中該針座(20)具有一導流面(212)相接於該凹室(27)。
  4. 如請求項1所述的安全注射器,其中該針座(20)具有一內縮面(211)對應該連動變形部(25)。
  5. 如請求項1所述的安全注射器,其中該針座(20)中心線到勾桿(24)外緣的垂直距離(L1)小於該針座(20)中心線到連動變形部(25)外緣的垂直距離(L2)。
  6. 如請求項1所述的安全注射器,其中該卡筒部(26)延伸一部分長度與該連動變形部(25)相連接。
  7. 如請求項1所述的安全注射器,其更包含一密封環(R)設在該針筒(1)與針座(20)之間。
  8. 如請求項1所述的安全注射器,其中該針筒(1)具有一主筒(10)及一前套(50)套接於該主筒(10)。
  9. 如請求項8所述的安全注射器,其更包含一密封環(R)設於該前套(50)與針座(20)的座身(21)之間。
  10. 如請求項1所述的安全注射器,其中該針筒(1)具有一沉孔(15),該針座(20)具有一座肩(23)配合定位於該針筒(1)的沉孔(15)。
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