| 摘要 |
A knob body of a rigid resin is divided at a generally central portion thereof in front and rear directions into a first knob division portion and a second knob division portion. A button insertion tubular portion and a mounting tubular portion are formed integrally with the first knob division portion, and a shell is provided to cover the outer periphery of the knob body. The first and second knob division portions are molded separately from each other, and by doing so, the thickness can be made thin.
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