| 摘要 |
<p>PURPOSE:To ensure to avoid malfunction of the operating button, by the constitution that the operating buttons are classified into three groups depending on functions and they can be locked to the pushed-in position with separate lock mechanism on each group. CONSTITUTION:The operating buttons are classified into the three goups on functions, the reproduction operating button 7-4 as the first group, rewinding and fast winding buttons 7-2, 7-3 as the second group, and recording and post recording buttons 7-5, 7-6 as the third group. Further, on each group, the buttons are locked to the pushed-in position with the separate lock mechanisms 13, 14, 15, enabling to avoid the effect between the buttons belonging to the second and third groups. Accordingly, when the second group, e.g., the fast winding button 7-3 is locked to the pushed-in position, even if the button of other group (i.e., 7-5) is pushed by mistake, the malfunction such as out-of-lock of the button at the pushed-in position due to the shock of pushed-in operation can surely be avoided.</p> |
