| 摘要 |
PROBLEM TO BE SOLVED: To make improvements in operability over a push button by forming a guide projecting part in and around this push button operating a detent rod, and making up a guide groove, where the guide projecting part engages, in a push-button setup member inserting this push button retractably. SOLUTION: At the time of assembly of a knob body 1 being equipped with a push-button setup member 4 and those of a push button 5, a switch 6, a detent rod 7 and a connecting member 8 to be engaged with the former, respective members of the switch 6 are inserted into the push-button setup member 4 from the backside, and the push button 5 is also inserted from the backside of a first tubular part 4d of this member 4. Then a stopper 5a and a guide projecting part 5c both are formed in and around this push button 5, and those of first to fourth width parts 4g1 to 4g4 are formed in a guide groove 4g of the first tubular part 4d of the push-button setup member 4. In addition, this push button 5 prevents the stopper 5a from falling off the push-button setup member 4 upon colliding with the falling preventing part 4f, while it makes the guide projecting part 5c plunge into a setup hole 2d straight by way of making it engage with the guide groove 4g, and thus its operation feeling will be made better. |
