| 摘要 |
In a switch in which an operation knob is rockable in an optional direction, the fluffy unsteady feeling is removed from the operation. A pair of engaging projections 25 is provided on a periphery of a knob mounting section 20 projecting from an upper case 13. A substantially octagonal annular joint member 21 is engaged with the engaging projections 25 and has a pair of engaging projections 23 provided in the direction of 90 degrees off the engaging projections 25 so as to be relatively rockably engaged with the operation knob 15, whereby the operation knob 15 is universally jointed through the joint member 21 with the knob mounting section 20. The operation knob 15 is capable of being rocked by pressing an optional position thereof in the circumferential direction, and by being pivoted on two axes (23, 25) meeting at right angles, properly controlled steady operation can be performed. A seal plate 22 is placed on a concave portion 14 of the upper case 13. Lift springs 17 are projectingly formed on the seal plate 22 at intervals of about 45 degrees in the circumferential direction. When pressing the optional position in the circumferential direction of the operation knob 15, any of the lift springs 17 is compressed such that a switch element located below the lift springs is turned on or off.
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