| 摘要 |
PURPOSE:To make an overstroke unnecessary, when a case is mounted, by mounting a lock lever upon a second lever such that it is biased counter-clockwise by a second spring, and by biasing a second lever clockwise. CONSTITUTION:A lever 16 coacts with a cassette case 11, when the case 11 is turned manually counter-clockwise, and has its action regulated when a guide pin 17b is retained in the step 18a of a cam 18. When the case 11 further rotates so that the retaining portion 12a of a link 12 is turned to a position below a lock claw 17a, a projection 11a abust abainst the lock lever 17 so that this lever 17 is turned clockwise against the biasing force of a spring 19 to release the engagement between the guide pin 17b of the lock lever 17 and the step 18a of the cam 18. Then, the lever 16 is turned clockwise by the spring 19 so that the lock claw 17a of the lock lever 17 is brought into abutment engagement with the retaining portion 12a of the link 12 to bring the cassette case 11 into its mounted condition. |
