| 摘要 |
<p>PURPOSE:To prevent an auto cassette changer for a recording and reproducing device, such as a VTR, from malfunction by detecting the operation of a push button of said changer by a detection switch and by holding an operation state by a detection lever locked at the operation position. CONSTITUTION:When a click recording button 59a to be locked or unlocked rotates as shown by an arrow P, a recording button 59 is pushed in the same direction to push a projection 248 with the reverse surface of the lever part 247 of the recording button 59a, and then a push-button detection lever 216 rotates in the same direction, so that the projection 249 of the lever 216 pushes the hook projection 250 of a switch operating lever 222. Consequently, the lever 222 rotates as shown by an arrow R and the pin 252 of the lever 222 press-contacts reaf contacts 253a and 253b of a push-button detection switch 226, thereby turning on the switch. When the recording button 59 is pushed completely, the projection 249 of the lever 216 moves over the conner part of the hook projection 250 as shown by the arrow P for enough clicking, and the elastic engagement between the projection 249 and hook projection 250 holds the lever 216 at the position. Then, the switch 226 detects the recording button 59 being pushed.</p> |
