| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for preventing a motor shaft from coming out, where a rotor can be perfectly prevented from coming out by putting a clip in a fully engaged state by using effectively the amount of force in the direction almost rectangular in the direction of the amount of a pushing force in the vertical direction in the longitudinal direction of a motor shaft by inserting the tip of the shaft of the rotor, and plastic deformation of the clip due to an overload is not caused. SOLUTION: This structure is provided with a clip 4 for maintaining the motor shaft in a state for preventing the coming-out and is constituted of a thrust washer 3 arranged on the closed-end part of a housing body to support a load in the thrust direction of the motor shaft 6, and a metal bearing 5 which supports pivotally the motor shaft in the radial direction. An abutting end portion 62 having an abutting surface 62a abutting against the thrust washer 3, and a small diameter trench part 61 made small in diameter are formed in the motor shaft 5. The clip 4 is formed from a cylinder base 41, plural stretching parts 42 which are stretched and can be deformed elastically, and a tip form part 43 which is formed in a unified body with a tip of the stretched part 42. The inner diameter size of the tip form part 43 is made at least the diameter size of the small diameter trench and at most into a diameter d1 size of the abutting end portion 62 in a free state, and made at least the diameter size of the abutting end portion with elastic deformation.
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