| 摘要 |
PURPOSE:To reduce the push stroke of a cartridge ejection button by providing a carrier receding at the time of loading a cartridge with a return spring and constituting a slide plate so that an ejection button and a lock part lock said plate. CONSTITUTION:The carrier 110 moves backward as the cartridge 134 inserts into a carrier aperture 118, and simultaneously the carrier 110 falls down due to the energizing force of a spring 128. As a result the engagement of an engagement part 150 with a bearing 152 is released, and rollers 120 and 122 fall in grooves 124 and 126. The slide plate 116 recedes against a spring 162, and the lock part 160 installed on a cartridge ejection button 114 turns to lock the plate 116. The plate 116 returns due to return force accumulated in a return spring 154 at the time of ejecting the cartridge. Accordingly only the slight depressing the button 114 improves the sense of operation.
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