JP6975042B2 - 注射装置用の注射針アセンブリおよびかかるアセンブリを備える注射装置 - Google Patents
注射装置用の注射針アセンブリおよびかかるアセンブリを備える注射装置 Download PDFInfo
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Description
針ハブに取り付けられた、針ハブから自由端に向かう軸に沿って延在する針カニューレと、
針カニューレを収容する軸方向に延在する細長いエンクロージャを形成する、可撓性の針カバーであって、針ハブに対して装着された針ハブ端部と、針カニューレの自由端を超えて延在する自由端とを有し、軸方向に向けられた貫通力が針ハブに向かって針カバーの自由端に対して加えられたとき、針カニューレを貫通させるために軸方向に潰れるように構成された、針カバーとを備え、針カバーは、
針カニューレを取り囲み、針ハブにある第1の軸方向端部と、針ハブと針カニューレの自由端との間に軸方向に位置する第2の軸方向端部とを有する細長いシャフト区画であって、針カニューレと当接するように径方向に変形可能である潰れ可能な壁区域を備え、潰れ可能な区域が、予め定義された壁厚t1,lim未満の壁厚t1を有する区域を備える、シャフト区画と、
シャフト区画の第2の軸方向端部に接続され、針カバーの自由端にある閉じた端面まで延在するバルブ区画であって、針カニューレの自由端と軸方向に重なり合うとともにそれを取り囲むバルブ壁区域を画定し、バルブ壁区域が少なくともt2の壁厚の壁区域を備え、t2が前記予め定義された壁厚範囲t1,limよりも厚く、壁厚t2よりも薄い壁厚t3を有する中央端壁区域を画定する、バルブ区画とを画定し、
針カバーは、初期の非貫通状態では、バルブ区画の壁区域およびシャフト区画の壁区域が針カニューレから離間された第1の構成をとる。
針ハブと、
針ハブに取り付けられた、針ハブから尖った先端に向かう針軸に沿った第1の方向に延在する細長い形状の針カニューレと、
針カニューレの少なくとも一部分を収容する、軸方向に延在する細長いエンクロージャを形成する可撓性の針カバーであって、針ハブに対して装着された第1の端部と針カニューレの尖った先端を越えて延在する第2の端部とを有し、針カニューレの尖った先端によって針カバーの第2の端部を貫通するため、針カバーの第2の端部に対して針ハブに向かって貫通力が加えられたとき、軸方向に潰れるように構成された、針カバーとを備え、
針カバーは、
針カニューレを取り囲むとともに、第1の端部から離れる方向に前記針軸に沿って延在する、最小壁厚t1の壁区域を備えるシャフト区画と、
針カニューレの尖った先端と軸方向に位置合わせされるとともに尖った先端を取り囲むバルブ壁区域を有し、閉じた中央端面を有し、前記最小壁厚t1よりも厚い壁厚を有する壁区域を備える、バルブ区画とを画定し、
シャフト区画は1つ以上の補強リブを備え、各補強リブは、針カニューレを少なくとも部分的に取り囲むように針軸に対して非平行で延在し、各補強リブは、バルブ区画と針ハブとの間に軸方向に配設されて、シャフト区画の隣接した潰れ領域を分割する。
後部針カバーは、
後部針を取り囲み、後部針カバーの第1の端部から離れる方向に前記針軸に沿って延在し、最小壁厚t1の壁区域を備えるシャフト区画と、
後部針の尖った先端と軸方向に位置合わせされ、尖った先端を取り囲むバルブ壁区域を有し、閉じた中央端面を有し、前記最小壁厚t1よりも厚い壁厚を有する壁区域を備える、バルブ区画とを画定し、
シャフト区画は1つ以上の補強リブを備え、各補強リブは、針カニューレを少なくとも部分的に取り囲むように針軸に対して非平行で延在し、各補強リブは、バルブ区画と針ハブとの間に軸方向に配設されて、シャフト区画の隣接した潰れ領域を分割する。
Claims (13)
- 針ハブ(4)に取り付けられ、前記針ハブから自由端(3a、3b)に向かう軸に沿って延在する、針カニューレ(3)と、
前記針カニューレ(3)を収容する、軸方向に延在する細長いエンクロージャを形成する可撓性針カバー(10、10a、10b)であって、前記針ハブ(4)に対して装着された第1の軸方向端部と前記針カニューレの前記自由端(3a、3b)を越えて延在する自由端とを有し、前記針カニューレ(3)によって貫通するため、前記針カバーの前記自由端に対して前記針ハブ(4)に向かって軸方向に向けられた貫通力が加えられたとき、軸方向に潰れるように構成された、針カバー(10、10a、10b)と、を備え、前記針カバー(10、10a、10b)が、
前記針カニューレ(3)を取り囲むとともに、前記針ハブ(4)側の前記第1の軸方向端部と、前記針ハブ(4)と前記針カニューレの前記自由端(3a、3b)との間に軸方向に位置する第2の軸方向端部とを有する、細長いシャフト区画(11a)であって、前記針カニューレ(3)と当接するように径方向に変形可能である潰れ可能な壁区域(15)を備え、前記潰れ可能な壁区域(15)が、予め定義された壁厚t1,limよりも薄い壁厚t1を有する区域を備える、シャフト区画(11a)と、
前記シャフト区画(11a)の前記第2の軸方向端部に接続され、前記針カバー(10、10a、10b)の前記自由端にある閉じた端面(18)まで延在するバルブ区画(11b)であって、軸方向に重なり合うとともに前記針カニューレ(3)の前記自由端を取り囲むバルブ壁区域(17a、19、17b)を画定し、前記バルブ壁区域が少なくともt2の壁厚を有する壁区域(17a、17b)を備え、t2が前記予め定義された壁厚t1,limよりも厚く、また、前記壁厚t2よりも薄い壁厚t3を有する中央端壁区域(20)を画定する、バルブ区画(11b)とを画定し、
前記針カバー(10、10a、10b)が、初期の非貫通状態では、前記バルブ区画(11b)の前記壁区域および前記シャフト区画(11a)の前記壁区域が前記針カニューレ(3)から離間された第1の構成をとり、
前記バルブ壁区域(17a、19、17b)が第1の環状のバルブ領域(17a)および第2の環状のバルブ領域(17b)を画定し、前記第1および前記第2の環状のバルブ領域(17a、17b)が少なくともt2の壁厚を有する壁区域を備え、0.15〜0.35mmの低減された壁厚の環状領域(19)が、前記第1の環状のバルブ領域(17a)および前記第2の環状のバルブ領域(17b)を分離する、注射装置用の注射針アセンブリ。 - 前記針カニューレ(3)の前記自由端(3a、3b)が、尖った先端およびヒールを画定する斜角部分を備え、少なくともt2の壁厚を有する前記バルブ区画(11b)の前記バルブ壁区域が、前記針カバー(10、10a、10b)が前記第1の構成をとると前記斜角部分の前記ヒールに軸方向に重なり合う、環状のバルブ領域(17a)を備える、請求項1に記載の注射針アセンブリ。
- 前記針カバー(10、10a、10b)が前記第1の構成をとると、前記シャフト区画(11a)の前記第2の軸方向端部が、前記ヒールから0.2〜2.0mmに位置し、少なくともt2の壁厚を有する前記環状のバルブ領域(17a)が、前記シャフト区画(11a)の前記第2の軸方向端部から軸方向に延在し、前記斜角部分の前記ヒールに軸方向に重なり合う、請求項2に記載の注射針アセンブリ。
- 前記予め定義された壁厚t1,limよりも薄い壁厚t1を有する前記シャフト区画(11a)の前記壁区域(15)が、前記環状のバルブ領域(17a)に接続する、請求項2または3に記載の注射針アセンブリ。
- t2が、0.4mm超過の壁厚を画定する、請求項2から4のいずれか一項に記載の注射針アセンブリ。
- 低減された壁厚を有する前記バルブ区画(11b)の前記環状領域(19)が、前記斜角部分の前記尖った先端に軸方向に重なり合う、請求項2から5のいずれか一項に記載の注射針アセンブリ。
- 前記バルブ区画(11b)が、前記針カバー(10、10a、10b)の前記自由端に向かってより大きい直径へとテーパー状になっている、径方向外側に面する表面を有する環状領域(19、17b)を備え、全体的に平坦な端面(18)が前記針カバー(10、10a、10b)の前記自由端の最外端面に配置される、請求項1から6のいずれか一項に記載の注射針アセンブリ。
- 前記針カバー(10、10a、10b)が、前記第1の構成では、1.5〜4mmの範囲内の直径を有する径方向内側に面する表面を備える、請求項1から7のいずれか一項に記載の注射針アセンブリ。
- 前記予め定義された壁厚t1,limが、0.12〜0.3mmで選択される、請求項1から8のいずれか一項に記載の注射針アセンブリ。
- 前記シャフト区画(11a)が、t1,limの1.5倍超の壁厚を有する1つ以上の補強リブ(16)を備える、請求項1から9のいずれか一項に記載の注射針アセンブリ。
- 前記バルブ区画(11b)の中央端壁区域(20)が、0.20〜0.35mmで選択される壁厚t3を有する、請求項1から10のいずれか一項に記載の注射針アセンブリ。
- 前記バルブ区画(11b)の中央端壁区域(20)が、0.23〜0.28mmで選択される壁厚t3を有する、請求項1から10のいずれか一項に記載の注射針アセンブリ。
- 請求項1から12のいずれか一項に記載の注射針アセンブリ(50)を備える注射装置(1)であって、針開口部を有する針シールド(5)を更に備え、前記針シールド(5)および前記注射針アセンブリ(50)が互いに対して軸方向に摺動可能に配置されて、前記針カニューレ(3)に前記針カバー(10b)を貫通させ、前記針シールド(5)の前記針開口部を通して突出させる、注射装置(1)。
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PCT/EP2016/051369 WO2016116614A1 (en) | 2015-01-22 | 2016-01-22 | An injection needle assembly for an injection device and an injection device comprising such assembly |
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US20170361029A1 (en) | 2017-12-21 |
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