Bearing unit, and motor and electronic equipment, both equipped with the bearing unit

Abstract

In the present invention, a bearing unit comprises a shaft, a radial bearing for supporting a peripheral rotation direction of the shaft, a thrust bearing for supporting one end of the shaft in a thrust direction, a housing having the radial bearing and the thrust bearing, both arranged therein, and being formed in a structure being sealed except for a shaft insertion hole, through which the shaft is inserted, and a viscous fluid to be filled in the housing, and the housing is provided with a locking portion for preventing shaft slip-out on an inner surface side thereof, which is a peripheral portion of the shaft insertion hole, in a state of abutting a part of the shaft. This arrangement makes it possible to reduce the length of the bearing unit in its shaft direction and to enhance versatility and selectivity of the bearing unit.

Description

Technical field [0001] The present invention relates to a bearing unit that rotatably supports a rotating shaft or rotatably supports a rotating body to the shaft, and a motor and electronic equipment equipped with the bearing unit. Background technique [0002] As a bearing unit that rotatably supports a rotating shaft, a bearing unit configured as shown in FIG. 21 is conventionally known. [0003] The bearing unit 100 shown in FIG. 21 rotatably supports the rotating shaft 101, and is equipped with a radial bearing 104, a space forming member 119 integrally formed with the thrust bearing 110, and accommodating the radial bearing 104 and the space forming member 119 The radial bearing 104 is used to support the rotating shaft 101 in its circumferential direction, and the thrust bearing 110 supports one end of the rotating shaft 101 in the thrust direction. [0004] In the bearing unit 100, the radial bearing 104 constitutes a hydrodynamic bearing together with lubricating oil fil...

AI Technical Summary

Problems solved by technology

[0041] However, since the protruding block 177 is formed on one side of the bottom seal portion 167 or on one side of the seal portion of the housing 165 for preventing the shaft from slipping out, it is difficult for the above-mentioned bearing unit 160 to reduce its position on the shaft. upward length

[0042] Therefore, in these bearing units 100, 130, and 160, general versatility and selectivity are limited due to the length of the bearing units in the axial direction, and the degree of freedom in designing products using these bearing units is also limited.

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