| 摘要 |
<p>A small-sized air pump of simple construction, an air chamber provided therewith, and a wrist watch provided with an air chamber device and well fittable to the arm. A through hole (1a) is provided on an air pump (1) in the position where the pump is pressed by a finger so that any valve for introducing outside air into the pump can be dispensed with. An air chamber device (10) that ensures easy introduction and discharge of air is mounted on the back cover side of the wrist watch. The air chamber device is provided at one end thereof with the air pump (1) and at the other end thereof with an air discharge valve (3).</p> |
