| 摘要 |
PURPOSE: To provide a lock mechanism by which a coupling protrusion is inserted surely into a lock hole so as to be set to a lock state and by which the lock state is not released carelessly. CONSTITUTION: A lock mechanism 25 is provided with a coupling protrusion 31 which is installed at one out of a main body 27 and a cover 29 and with a flexible lock arm 35 which is installed at the other and in which a lock hole 33, to which the coupling protrusion 31 is fitted, is made. In the lock mechanism, a guide and holding means 37 by which, when the coupling protrusion 31 is fitted to the lock hole 33, the lock arm 35 is guided to a fitting direction, in which the coupling protrusion 31 is fitted to the lock hole 33, and which holds the fitting state of the coupling protrusion 31 to the lock hole 33 is installed. |
