Abstract: A motor includes a rotor, a stator, a first substrate, a second substrate, and an electronic component arranged at the second substrate. The stator includes a stator core, an insulator, and a coil wound around the stator core via the insulator. The insulator includes a coupling part connected to an external device. The first substrate is fixed to the insulator. The second substrate is fixed to the first substrate. The first substrate and the second substrate are spaced apart in a rotation axis direction of the rotor.

Abstract: A motor includes a rotor, a stator, a first substrate, a second substrate, and an electronic component arranged at the second substrate. The stator includes a stator core, an insulator, and a coil wound around the stator core via the insulator. The insulator includes a coupling part connected to an external device. The first substrate is fixed to the insulator. The second substrate is fixed to the first substrate. The first substrate and the second substrate are spaced apart in a rotation axis direction of the rotor.

Abstract: A motor includes a rotor, a stator, a first substrate, a second substrate, and an electronic component arranged at the second substrate. The stator includes a stator core, an insulator, and a coil wound around the stator core via the insulator. The insulator includes a coupling part connected to an external device. The first substrate is fixed to the insulator. The second substrate is fixed to the first substrate. The first substrate and the second substrate are spaced apart in a rotation axis direction of the rotor.

Abstract: A motor including: a frame having an inner peripheral portion; a holder configured to be supported by the frame; a shaft passing through the inner peripheral portion of the frame; and a bearing configured to support the shaft, and the holder includes: a tubular portion configured to hold the bearing; and an outer peripheral portion provided with a plurality of hole portions arranged in a circumferential direction, and each of portions of the inner peripheral portion of the frame are inserted into a distinct one of the plurality of hole portions.

Abstract: A rotating device has a housing having an opening portion opened to one side in a rotor axis direction, a rotor accommodated in the housing, a substrate coupling to the opening portion, and a cover covering a part of the substrate, and a snap portion and a loop portion are provided on an end portion, in the housing, forming the opening portion and are arranged in a radial direction. The substrate has an engaged portion engaging with the snap portion, and the cover has an engaged portion engaging with the loop portion.

Abstract: A motor including: a frame having an inner peripheral portion; a holder configured to be supported by the frame; a shaft passing through the inner peripheral portion of the frame; and a bearing configured to support the shaft, and the holder includes: a tubular portion configured to hold the bearing; and an outer peripheral portion provided with a plurality of hole portions arranged in a circumferential direction, and each of portions of the inner peripheral portion of the frame are inserted into a distinct one of the plurality of hole portions.

Abstract: A rotating device has a housing having an opening portion opened to one side in a rotor axis direction, a rotor accommodated in the housing, a substrate coupling to the opening portion, and a cover covering a part of the substrate, and a snap portion and a loop portion are provided on an end portion, in the housing, forming the opening portion and are arranged in a radial direction. The substrate has an engaged portion engaging with the snap portion, and the cover has an engaged portion engaging with the loop portion.

Abstract: There is provided a fluid bearing including: a sleeve having a bearing hole; a shaft being inserted into the bearing hole to be rotatable with respect to the sleeve; a thrust portion that is fixed to the sleeve and covers one end portion of the bearing hole; and a liquid filled in a gap between the sleeve and the shaft. The bearing hole is configured to have a first portion having a first diameter; a second portion that is located at an end portion that is closer to the thrust portion than the first portion, the second portion having a second diameter that is substantially the dame with the first diameter; and a groove that is located at a position between the first portion and the second portion.

Abstract: There is provided a fluid bearing including: a sleeve having a bearing hole; a shaft being inserted into the bearing hole to be rotatable with respect to the sleeve; a thrust portion that is fixed to the sleeve and covers one end portion of the bearing hole; and a liquid filled in a gap between the sleeve and the shaft. The bearing hole is configured to have a first portion having a first diameter; a second portion that is located at an end portion that is closer to the thrust portion than the first portion, the second portion having a second diameter that is substantially the dame with the first diameter; and a groove that is located at a position between the first portion and the second portion.

Abstract: Fluid bearing equipment which is free from lockup or seizure which may occur due to a deficiency of a lubricating fluid when the equipment is operated at a high rotation speed in a high temperature environment. The fluid bearing equipment is arranged such that maximum pressure generating portions 23 of dynamic pressure generating grooves 15, 16 provided in a thrust-side dynamic pressure generating portion are located closer to the outer circumference of a stationary thrust plate 9 than a radially middle position of the thrust-side dynamic pressure generating portion. With this arrangement, the lockup and seizure of a motor can be prevented which may otherwise occur due to a deficiency of the lubricating fluid when the equipment is operated at a high rotation speed in a high temperature environment.

Abstract: In a spindle device mounted to a disc driving apparatus, a mist seal which blocks a mist of lubricating fluid, an oil seal which prevents the lubricating fluid from flowing out, and an oil pool which prevents surplus fluid from flowing out, are combined and disposed so that the lubricating fluid from a dynamic-pressure-fluid bearing is prevented from flowing out or splashing into a clean space. As a result, inconveniences such as a head crush or a head absorption can be avoided, and a reliable spindle device is realized.

Abstract: A hydrodynamic bearing which prevents a lubricating fluid from scattering out of the dynamic pressure generating portion. The bearing includes radial spacing d of a gap at an open end of the thrust-side dynamic pressure generating portion, whose value is greater than a spacing of the thrust-side dynamic pressure generating portion, as measured relative to the thrust direction. Scattering of lubricating fluid from the open end of the thrust-side dynamic pressure generating portion is therefore prevented even when the bearing rotates at a high speed in a high temperature envivronent.

Abstract: In a spindle device mounted to a disc driving apparatus, a mist seal which blocks a mist of lubricating fluid, an oil seal which prevents the lubricating fluid from flowing out, and an oil pool which prevents surplus fluid from flowing out, are combined and disposed so that the lubricating fluid from a dynamic-pressure-fluid bearing is prevented from flowing out or splashing into a clean space. As a result, inconveniences such as a head crush or a head absorption can be avoided, and a reliable spindle device is realized.

Abstract: An object of the present invention is to provide a hydrodynamic bearing device which has an improved construction to prevent a lubricating fluid from scattering out of a dynamic pressure generating portion. The hydrodynamic bearing device of the present invention is characterized in that a radial spacing &Dgr;d of a gap at an open end of a thrust-side dynamic pressure generating portion is set greater than a spacing 26 of the thrust-side dynamic pressure generating portion as measured with respect to the thrust direction. With this arrangement, the scattering of the lubricating fluid from the open end of the thrust-side dynamic pressure generating portion is prevented even when the hydrodynamic bearing device is operated at a high rotation speed in a high temperature environment.

Abstract: In a spindle device mounted to a disc driving apparatus, a mist seal which blocks a mist of lubricating fluid, an oil seal which prevents the lubricating fluid from flowing out, and an oil pool which prevents surplus fluid from flowing out, are combined and disposed so that the lubricating fluid from a dynamic-pressure-fluid bearing is prevented from flowing out or splashing into a clean space. As a result, inconveniences such as a head crush or a head absorption can be avoided, and a reliable spindle device is realized.

Abstract: An object of the present invention is to provide a fluid bearing equipment which is free from lockup or seizure which may occur due to a deficiency of a lubricating fluid when the equipment is operated at a high rotation speed in a high temperature environment. The fluid bearing equipment is arranged such that maximum pressure generating portions 23 of dynamic pressure generating grooves 15, 16 provided in a thrust-side dynamic pressure generating portion are located closer to the outer circumference of a stationary thrust plate 9 than a radially middle position of the thrust-side dynamic pressure generating portion. With this arrangement, the lockup and seizure of a motor can be prevented which may otherwise occur due to a deficiency of the lubricating fluid when the equipment is operated at a high rotation speed in a high temperature environment.

Abstract: In a spindle device mounted to a disc driving apparatus, a mist seal which blocks a mist of lubricating fluid, an oil seal which prevents the lubricating fluid from flowing out, and an oil pool which prevents surplus fluid from flowing out, are combined and disposed so that the lubricating fluid from a dynamic-pressure-fluid bearing is prevented from flowing out or splashing into a clean space. As a result, inconveniences such as a head crush or a head absorption can be avoided, and a reliable spindle device is realized.

Abstract: A brushless motor includes (a) a rotor magnet having plural magnetic polarities and (b) a stator core facing the rotor magnet via an annular space. The stator core has plural teeth wound by coils, and a teeth width ranges from not less than 1.7 mm to not more than 2.2 mm, or an outer diameter of the rotor core vs. the teeth width ranges from not less than 8 to not more than 12. This structure allows the brushless motor to rotate with less vibrations, lower noise and lower current consumption.

Abstract: In a spindle device mounted to a disc driving apparatus, a mist seal which blocks a mist of lubricating fluid, an oil seal which prevents the lubricating fluid from flowing out, and an oil pool which prevents surplus fluid from flowing out, are combined and disposed so that the lubricating fluid from a dynamic-pressure-fluid bearing is prevented from flowing out or splashing into a clean space. As a result, inconveniences such as a head crush or a head absorption can be avoided, and a reliable spindle device is realized.

Abstract: It is an object of the present invention to provide a hydrodynamic bearing which is highly reliable and capable of preventing a lubricant contained therein from flowing out of the bearing. In the hydrodynamic bearing, lower and upper end portions of a stationary shaft are properly spaced from a sleeve and a thrust plate, respectively, and an air channel is provided inside the stationary shaft with one end thereof opening to a space defined between an outer circumferential portion of the stationary shaft and the sleeve and with the other end thereof communicating with the outside. Thus, the hydrodynamic bearing has a highly reliable construction which can assuredly prevent the flow-out of the lubricant.