发明名称 |
Dial-down mechanism for wind-up pen |
摘要 |
<p>The invention relates to a torsion spring driven injection device having a dial-down mechanism for dialling down a selected dose size. The torsion spring (2) is strained when setting a dose by rotating a proximally located dose setting button(30) relatively to the housing in a first direction and unstrained when rotating the same dose setting button (30) in a second direction opposite the first direction. In order to secure the torsion spring (2) in its strained position a one-way ratchet mechanism is provided. This one-way ratchet mechanism comprises a fixation element (1) coupled to the housing and having a toothing (6) and a ratchet element (20) having at least one ratchet arm (22) engaging the fixation element (1) and which ratchet element (20) is operational coupled to the dose setting button (30). The dose setting button (30) directly engages the at least one ratchet arm (22) when the dose setting button (30) is rotated in the second direction which releases the at least one ratchet arm (22) from the toothing (6) of the fixation element (1) and allows the ratchet element (20) to rotate relatively to the fixation element (1) in the second direction under influence of the torsion spring (2).</p> |
申请公布号 |
AU2013269952(A1) |
申请公布日期 |
2014.11.13 |
申请号 |
AU20130269952 |
申请日期 |
2013.03.15 |
申请人 |
NOVO NORDISK A/S |
发明人 |
PEDERSEN, SIMON MUNCH;RORVIG, SIMON |
分类号 |
A61M5/20;A61M5/315 |
主分类号 |
A61M5/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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