| 摘要 |
<p>The present invention relates to a device and method for alternately holding and releasing a metallic sample holder, in particular a metallic cap closing a sample containing vial to be transferred to or maintained in a location for analysis or preparation of the sample. The device (1) comprises:
- a support member (6) provided with a pin, which is provided with a magnet at its free end for holding the sample holder,
- an outer fixed tubular body (10) which is mounted on the support member around and along the pin, and
- an inner tubular guide (11) movably mounted inside the body and able to occupy a releasing position where its outer end (11 a) surrounds the magnet, and a holding position where the guide is retracted inwards the body so that the magnet may hold the sample holder.
At least one cam (18) is formed on the guide and cooperates with a cam follower (17) movably through the body upon movement of the guide and with elastic means biasing the guide towards its releasing position, to reversibly lock the follower in said holding position when the guide is moved inwards the body and to retrieve said initial releasing position, after further moving the guide inwards and releasing this movement.</p> |
