| 摘要 |
PURPOSE:To set operation power even over a whole operation range by setting the height of the top part of an uneven part in an intermediate part of the operation range from a lever surface higher than those of both side parts. CONSTITUTION:In the uneven part 12, the height from the surface of the lever 1 of the top part is set larger than that from both side parts to the intermediate part of the operation range of the lever 1. In such a case, the height from the bottom is constant over the whole operation range and each uneven shape is the same. Thus, the height of a projecting part 9 in the lever 1, which is engaged with the uneven part 12 in the intermediate part from the surface of the lever 1 is higher than those of the both side parts, whereby the bending of a flat spring 8 comes to bend wide and its energizing power increases. Consequently, the power in an operation direction, which the projecting part 9 needs to get over the projecting part of the uneven part 12, becomes larger, and the control power must be strengthened accordingly. For operating the operation lever 1 from both side parts to the intermediate part, the operation power does not change but in becomes constant.
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