Shaft slip-off stopping structure and switch having the same
AssigneeToyo Denso Kabushiki Kaisha
InventorsYukiyoshi Takatsu, Shingo Miyayama
Life of this patent
Estimating the term…
Abstract
Disclosed is a shaft inserted member into which a shaft is inserted in a relatively movable manner, and a locking mechanism provided in the shaft inserted member. The tip portion of the shaft includes a locking step portion formed by providing an annular groove or a ring-shaped projection portion. The locking mechanism includes at least two locking pieces arranged around the shaft at an equal interval. The shaft is stopped from slipping off by a tip portion of each of the tip locking portions abutting on the locking step portion. The locking piece can receive the force in a pulling direction in a length direction of the locking piece, whereby a load can be reduced. That is, sufficient strength can be maintained.
Claims5
A shaft slip-off stopping structure comprising:
- (a) a shaft inserted member into which a shaft is inserted in a relatively movable manner;
- (b) a locking mechanism being provided in the shaft inserted member;
- (c) the shaft slip-off stopping structure being configured between a tip portion of the shaft and the locking mechanism in a direction opposite to an insertion direction, wherein the tip portion of the shaft includes the following portions towards a tip thereof in order:
- a base shaft portion having a diameter R1;
- a tapered portion in which the diameter R1 is gradually reduced to a diameter R2, the diameter R2 being less than the diameter R1, a locking step portion being formed by providing an annular groove or a ring-shaped projection portion, and a locking portion having a diameter R3, the diameter R3 being greater than the diameter R2;
- (d) the locking mechanism including at least two locking pieces arranged around the shaft at an equal interval, and each of the locking pieces including a base part extending along a length direction of the shaft, and a tip locking portion bending from the base part and extending toward a center direction;
- (e) an inner surface of a base shaft clamping portion being formed into a shape along an outer periphery surface of the base shaft portion of the shaft and an inner surface of a taper clamping portion being formed into a shape along the tapered portion respectively, and;
- (f) the shaft being stopped from slipping off by a tip portion of each of the tip locking portions abutting on the locking step portion.
Dependencies are inferred from the claim text.