JP2013183628A

JP2013183628A - Motor

Info

Publication number: JP2013183628A
Application number: JP2012249735A
Authority: JP
Inventors: Shintaro Saeki; 信太郎佐伯; Atsushi Hachiman; 篤志八幡
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2012-03-01
Filing date: 2012-11-13
Publication date: 2013-09-12

Abstract

PROBLEM TO BE SOLVED: To provide a structure which obtains the rigidity of a base member while reducing a height of an entire motor.SOLUTION: A base member 21 includes: a cylinder part 211; a first housing part 212; coil housing parts 213; a second housing part 214; and a third housing part 215. The cylindrical shaped cylinder part extends in an axial direction. The first housing part may house at least a part of a stator around the cylinder part. The multiple coil housing parts are arranged in a circumferential direction around the cylinder part at the first housing part. Each coil may be housed in each coil housing part. The second housing part is arranged in the first housing part and extends along the cylinder part in the circumferential direction. A part of a wiring board may be housed in the second housing part. The third housing part extends from the second housing part in a radial outer direction. The third housing part may house a part of the wiring board. An opening 24 penetrating through the base member is arranged in the third housing part.

Description

本発明は、モータおよびディスク駆動用装置等に用いられるベース部材に関する。 The present invention relates to a base member used for a motor and a disk drive device.

従来、ハードディスク駆動装置等のディスク駆動装置では、ディスクを回転するスピンドルモータが搭載される。ディスク駆動装置は、ディスク、ハウジング、ステータ、ＦＰＣ（Flexible Printed Circuit）などを有する。ハウジングは、カバー部材やベース部材などを有する。
特開２００７−２９５６６６号公報特開平８−２３７８９９号公報 Conventionally, a disk drive device such as a hard disk drive device is equipped with a spindle motor that rotates the disk. The disk drive device includes a disk, a housing, a stator, an FPC (Flexible Printed Circuit), and the like. The housing includes a cover member, a base member, and the like.
JP 2007-295666 A JP-A-8-237899

近年、ディスク駆動装置には、より薄型かつ小型化が求められている。特に、ディスク駆動装置の中でも小型の類に属する、２．５型かつ７ｍｍ厚以下や２．５型かつ５ｍｍ厚以下のディスク駆動装置を薄型化するためには、ハウジングやハウジング内部に配置されるモータ自体を薄くする必要がある。一般に、モータは、ハブ、コイル、ステータコア、配線基板、ベース部材などを有する。モータの組み立て時において、これらの部材は、軸方向にそれぞれ重なるように配置される。モータ自体を薄くするためには、これらの各部材をそれぞれ薄くする必要がある。しかし、コイルのターン数やステータコアの積み厚を減らしてモータ全体を薄型化しようすると、モータの駆動時にステータから生じる磁束が減少してしまう。すなわち、トルク定数などが減少することになり、ハブに取り付けられたディスクを回転させるために必要なトルクが、得られなくなってしまう。 In recent years, disk drives have been required to be thinner and smaller. In particular, in order to reduce the thickness of a disk drive device of 2.5 type and 7 mm thickness or less, or 2.5 type and 5 mm thickness or less, which belongs to a small type among disk drive devices, the disk drive device is disposed inside a housing or a housing. The motor itself needs to be thin. Generally, a motor has a hub, a coil, a stator core, a wiring board, a base member, and the like. When the motor is assembled, these members are arranged so as to overlap each other in the axial direction. In order to make the motor itself thinner, it is necessary to make each of these members thinner. However, if the number of turns of the coil and the thickness of the stator core are reduced to reduce the thickness of the entire motor, the magnetic flux generated from the stator when the motor is driven decreases. That is, the torque constant or the like is reduced, and the torque necessary for rotating the disk attached to the hub cannot be obtained.

ゆえに、モータを薄型化するためには、モータを構成する部材の中でも、モータの軸方向寸法において大きなウェイトを占めるベース部材に着目する必要がある。しかし、単にベース部材を薄くするだけでは、ベース部材の剛性が大幅に低下してしまう。その結果、ベース部材に外部から衝撃が加わった場合には、ベース部材が破損し、ハウジング内に配置されるディスクが破損する虞がある。 Therefore, in order to reduce the thickness of the motor, it is necessary to pay attention to the base member that occupies a large weight in the axial dimension of the motor among the members constituting the motor. However, simply thinning the base member significantly reduces the rigidity of the base member. As a result, when an impact is applied to the base member from the outside, the base member may be damaged, and the disk disposed in the housing may be damaged.

したがって、モータ全体の高さを押さえつつ、ベース部材の剛性が得られるような構造が求められている。 Therefore, there is a demand for a structure that can obtain the rigidity of the base member while suppressing the height of the entire motor.

本願発明にかかる例示的な一実施形態は、薄板状のベース部材に関する。ベース部材は、ステータや配線基板が配置され、ディスク駆動装置に用いられる。ステータは、複数のコイルを有する。配線基板は、ステータに電気的に接続される。ベース部材は、筒部と、第１収容部と、コイル収容部と、第２収容部と、第３収容部と、を備える。筒部は、中心軸を中心とする円筒状であり、軸方向に向かって伸びる。第１収容部は、筒部の周りにステータの少なくとも一部が収容可能である。複数のコイル収容部は、第１収容部内において筒部周りに周方向に配置される。各コイル収容部内には、コイルがそれぞれ収容可能である。第２収容部は、第１収容部内に配置され、筒部に沿って周方向に伸びる。第２収容部内には、配線基板の一部が収容可能である。第３収容部は、第２収容部から径方向外方に向かって伸びる。第３収容部は、配線基板の一部が収容可能である。第３収容部には、ベース部材を貫通する開口部が配置される。 An exemplary embodiment according to the present invention relates to a thin plate-like base member. The base member is provided with a stator and a wiring board, and is used in a disk drive device. The stator has a plurality of coils. The wiring board is electrically connected to the stator. The base member includes a tube portion, a first housing portion, a coil housing portion, a second housing portion, and a third housing portion. The cylindrical portion has a cylindrical shape centered on the central axis and extends in the axial direction. The first accommodating portion can accommodate at least a part of the stator around the cylindrical portion. The plurality of coil housing portions are arranged in the circumferential direction around the cylindrical portion in the first housing portion. Each coil accommodation part can accommodate a coil. A 2nd accommodating part is arrange | positioned in a 1st accommodating part, and is extended in the circumferential direction along a cylinder part. A part of the wiring board can be accommodated in the second accommodating portion. The third housing portion extends radially outward from the second housing portion. A part of the wiring board can be accommodated in the third accommodating portion. An opening that penetrates the base member is disposed in the third housing portion.

本発明の一実施形態によれば、モータ全体の高さを押さえつつ、ベース部材の剛性を保つことができる。 According to one embodiment of the present invention, the rigidity of the base member can be maintained while suppressing the height of the entire motor.

図１は、本発明の例示的な一の実施形態に係るモータの断面図である。FIG. 1 is a cross-sectional view of a motor according to an exemplary embodiment of the present invention. 図２は、本発明の例示的な一の実施形態に係るベース部材の上面側の斜視図である。FIG. 2 is a perspective view of the upper surface side of the base member according to an exemplary embodiment of the present invention. 図３は、本発明の例示的な一の実施形態に係るベース部材の下面側の斜視図である。FIG. 3 is a perspective view of the lower surface side of the base member according to an exemplary embodiment of the present invention. 図４は、本発明の例示的な一の実施形態に係る配線基板の平面図である。FIG. 4 is a plan view of a wiring board according to an exemplary embodiment of the present invention. 図５は、本発明の例示的な一の実施形態に係る配線基板が引き回された状態を示すベース部材の平面図である。FIG. 5 is a plan view of the base member showing a state in which the wiring board according to the exemplary embodiment of the present invention is routed. 図６は、本願発明にかかる変形例のモータの部分的な断面図である。FIG. 6 is a partial cross-sectional view of a modified motor according to the present invention. 図７は、本願発明にかかる変形例におけるベース部の斜視図である。FIG. 7 is a perspective view of a base portion in a modification according to the present invention. 図８は、本願発明にかかる変形例におけるベース部の斜視図である。FIG. 8 is a perspective view of a base portion in a modification according to the present invention. 図９は、本願発明にかかる変形例におけるベース部の部分拡大図である。FIG. 9 is a partially enlarged view of the base portion in a modification according to the present invention.

本明細書では、モータの中心軸方向における図１の上側を単に「上側」と呼び、下側を単に「下側」と呼ぶ。なお、上下方向は、実際の機器に組み込まれたときの位置関係や方向を示すものではない。また、中心軸に平行な方向を「軸方向」と呼び、中心軸を中心とする径方向を単に「径方向」と呼び、中心軸を中心とする周方向を単に「周方向」と呼ぶ。 In the present specification, the upper side of FIG. 1 in the direction of the central axis of the motor is simply referred to as “upper side”, and the lower side is simply referred to as “lower side”. Note that the vertical direction does not indicate the positional relationship or direction when incorporated in an actual device. A direction parallel to the central axis is referred to as an “axial direction”, a radial direction centered on the central axis is simply referred to as “radial direction”, and a circumferential direction centered on the central axis is simply referred to as “circumferential direction”.

図１は、本願発明にかかる好ましい実施形態におけるスピンドルモータ１の断面図である。以下の説明では、スピンドルモータ１を、単にモータ１と呼ぶ。モータ１は、２．５型かつ７ｍｍ厚以下や２．５型かつ５ｍｍ厚以下などのディスク駆動装置（例えば、ハードディスク駆動装置）などに用いられる。ディスク駆動装置は、モータ１、ハウジング（図示省略）、少なくとも１枚のディスク（図示省略）、アクセス部（図示省略）、コネクタ（図示省略）、などを有する。ディスクは、モータ１に取り付けられる。アクセス部は、ディスクに対して、情報の「読み出し」および「書き込み」の少なくとも一方を行う。ハウジングは、ベース部材２１とカバー部材を有する。ベース部材２１は、カバー部材（図示省略）とともに、ハウジングの一部を構成する。 FIG. 1 is a cross-sectional view of a spindle motor 1 in a preferred embodiment according to the present invention. In the following description, the spindle motor 1 is simply referred to as the motor 1. The motor 1 is used for a disk drive device (for example, a hard disk drive device) of 2.5 type and 7 mm thickness or less, or 2.5 type and 5 mm thickness or less. The disk drive device includes a motor 1, a housing (not shown), at least one disk (not shown), an access unit (not shown), a connector (not shown), and the like. The disk is attached to the motor 1. The access unit performs at least one of “reading” and “writing” information on the disk. The housing has a base member 21 and a cover member. The base member 21 constitutes a part of the housing together with a cover member (not shown).

図１に示すように、モータ１は、アウタロータ型である。本実施形態においては、モータ１は、３つの相（Ｕ相、Ｖ相、およびＷ相）をもつ３相モータである。モータ１は、固定組立体である静止部２と、回転組立体である回転部３と、流体動圧軸受機構（以下、「軸受機構４」という）と、を有する。回転部３は、軸受機構４により、モータ１の中心軸Ｊ１を中心として静止部２に対して回転可能に支持される。 As shown in FIG. 1, the motor 1 is an outer rotor type. In the present embodiment, the motor 1 is a three-phase motor having three phases (U phase, V phase, and W phase). The motor 1 includes a stationary part 2 that is a fixed assembly, a rotating part 3 that is a rotating assembly, and a fluid dynamic bearing mechanism (hereinafter referred to as “bearing mechanism 4”). The rotating portion 3 is supported by the bearing mechanism 4 so as to be rotatable with respect to the stationary portion 2 around the central axis J1 of the motor 1.

静止部２は、ベース部材２１と、環状のステータ２２と、配線基板１４と、を有する。ベース部２１は、板状の部材である。ベース部２１は、筒部２１１と開口部２４とを有する。筒部２１１は、略円筒状である。ベース部２１は、ベース部材２１の略中央に配置される。開口部２４は、ベース部２１を軸方向に貫通する。ステータ２２は、筒部２１１の周囲に配置される。ステータ２２は、ステータコア２２１と、コイル２２２と、を有する。コイル２２２は、ステータコア２２１に配置される。ステータ２２では、各相（Ｕ相、Ｖ相、およびＷ相）のコイル２２２から引き出された複数（ここでは３本）の引出線２２２１が、配線基板１４に、それぞれ、半田付けによって接続される。 The stationary part 2 includes a base member 21, an annular stator 22, and a wiring board 14. The base part 21 is a plate-like member. The base part 21 has a cylindrical part 211 and an opening part 24. The cylinder part 211 is substantially cylindrical. The base portion 21 is disposed at the approximate center of the base member 21. The opening 24 penetrates the base portion 21 in the axial direction. The stator 22 is disposed around the cylindrical portion 211. The stator 22 has a stator core 221 and a coil 222. The coil 222 is disposed on the stator core 221. In the stator 22, a plurality of (here, three) lead wires 2221 drawn from the coils 222 of each phase (U phase, V phase, and W phase) are connected to the wiring board 14 by soldering. .

配線基板１４の好ましい一例として、フレキシブルプリント基板（Flexible Printed Circuit Board）が挙げられる。配線基板１４は、ベース部材２１の上面に位置し、回転部３側から開口部２４側に向かって延びる。 A preferred example of the wiring board 14 is a flexible printed circuit board. The wiring board 14 is located on the upper surface of the base member 21 and extends from the rotating part 3 side toward the opening part 24 side.

ステータコア２２１は、コアバック（図示省略）と、複数のティース（図示省略）と、を有する。コアバックは、中心軸Ｊ１を中心とする環状である。ティースは、コアバックの外縁部から径方向外方に延びる。ティースは、巻線部と、先端部と、を有する。巻線部には、導線が巻回されて、コイル２２２が形成される。先端部は、巻線部の外縁部から周方向両側に広がる。 Stator core 221 has a core back (not shown) and a plurality of teeth (not shown). The core back has an annular shape centered on the central axis J1. The teeth extend radially outward from the outer edge of the core back. The teeth have a winding part and a tip part. A conductive wire is wound around the winding portion to form a coil 222. The tip portion extends from the outer edge of the winding portion to both sides in the circumferential direction.

図１に示すように、回転部３は、ロータハブ３１と、ロータマグネット３２１と、を有する。ロータハブ３１は、ハブ本体３１１と、円筒部３１２と、環状のディスク載置部３１３と、を有する。円筒部３１２は、ハブ本体３１１の外縁部から下方へと突出する。ディスク載置部３１３は、円筒部３１２の下部から径方向外方に広がる。ディスク載置部３１３上には、ディスクが載置される。ロータマグネット３２１は、中心軸Ｊ１を中心とする環状である。ロータマグネット３２１は、円筒部３１２の内側に配置される。ロータマグネット３２１の下部の径方向外方には、ディスク載置部３１３が位置する。ロータマグネット３２１は、ステータ２２の径方向外側に配置される。ロータマグネット３２１は、ステータ２２と、径方向に対向する。モータ１では、ロータマグネット３２１とステータ２２との間にて、トルクが発生する。 As shown in FIG. 1, the rotating unit 3 includes a rotor hub 31 and a rotor magnet 321. The rotor hub 31 includes a hub body 311, a cylindrical portion 312, and an annular disk mounting portion 313. The cylindrical portion 312 protrudes downward from the outer edge portion of the hub body 311. The disk mounting portion 313 extends radially outward from the lower portion of the cylindrical portion 312. A disk is placed on the disk placement unit 313. The rotor magnet 321 has an annular shape centered on the central axis J1. The rotor magnet 321 is disposed inside the cylindrical portion 312. A disk mounting portion 313 is located outside the rotor magnet 321 in the radial direction at the bottom. The rotor magnet 321 is disposed on the radially outer side of the stator 22. The rotor magnet 321 faces the stator 22 in the radial direction. In the motor 1, torque is generated between the rotor magnet 321 and the stator 22.

図１に示すように、軸受機構４は、流体動圧軸受である。軸受機構４は、潤滑油、スリーブ４１、およびブッシュ４２を有する。スリーブ４１は、略円筒状の部材である。スリーブ４１は、粉末金属を焼き固めた焼結金属である。スリーブ４１は、スリーブ４１を上下方向に連通する連通孔４１１を有する。スリーブ４には、潤滑油が含浸される。ブッシュ４２は、略円筒形状である。ブッシュ４２の内側面は、スリーブ４１を支持する。ブッシュ４２の外側面には、ステータコア２２１が圧入やかしめなどによって固定される。さらにブッシュ４２は、筒部２１１の内側面において、圧入などによって固定される。 As shown in FIG. 1, the bearing mechanism 4 is a fluid dynamic pressure bearing. The bearing mechanism 4 includes lubricating oil, a sleeve 41, and a bush 42. The sleeve 41 is a substantially cylindrical member. The sleeve 41 is a sintered metal obtained by baking and solidifying a powder metal. The sleeve 41 has a communication hole 411 that allows the sleeve 41 to communicate in the vertical direction. The sleeve 4 is impregnated with lubricating oil. The bush 42 has a substantially cylindrical shape. The inner surface of the bush 42 supports the sleeve 41. A stator core 221 is fixed to the outer surface of the bush 42 by press-fitting or caulking. Further, the bush 42 is fixed on the inner surface of the cylindrical portion 211 by press-fitting or the like.

図２は、ベース部材２１の斜視図であり、ベース部材２１の上面側を示す。図３は、ベース部材２１の斜視図であり、ベース部材２１の下面側を示す。上述したように、ベース部材２１には、筒部２１１が配置される。筒部２１１の周りには、第１収容部２１２が配置される。軸方向から見たときに、第１収容部２１２は、略円環状である。第１収容部２１２は、ベース部２１の上面において、ベース部材２１の下面側に向かって凹む部位である。複数のコイル収容部２１３は、第１収容部２１２内に配置される。各コイル収容部２１３は、筒部２１１の周りに、周方向に等間隔に配置される。なお、各コイル収容部２１３は、必ずしも等間隔に配置される必要なく、不等配に配置されてもよい。コイル収容部２１３は、ベース部材２１の上面において、ベース部材２１の下面側に向かって凹む部位である。第２収容部２１４は、第１収容部２１２内に配置される。第２収容部２１４は、ベース部材２１の上面において、ベース部２１の下面側（軸方向下側）に向かって凹む部位である。第２収容部２１４は、軸方向から見たときに略円弧状である。第２収容部２１４は、筒部２１１の外側面に沿って、周方向に伸びる。第３収容部２１５は、第１収容部２１２内において、ベース部２１の下面側に向かって凹む部位である。第３収容部２１５は、第１収容部２１２内において、第２収容部２１４から径方向外方に向かって伸びる。第３収容部２１５の径方向外側には、ベース部材２１を軸方向に貫通する開口部２４が配置される。 FIG. 2 is a perspective view of the base member 21 and shows the upper surface side of the base member 21. FIG. 3 is a perspective view of the base member 21 and shows the lower surface side of the base member 21. As described above, the cylindrical portion 211 is disposed on the base member 21. A first accommodating portion 212 is disposed around the cylindrical portion 211. When viewed from the axial direction, the first housing portion 212 is substantially annular. The first housing portion 212 is a portion that is recessed toward the lower surface side of the base member 21 on the upper surface of the base portion 21. The plurality of coil housing portions 213 are disposed in the first housing portion 212. Each coil accommodating part 213 is arrange | positioned around the cylinder part 211 at equal intervals in the circumferential direction. In addition, each coil accommodating part 213 does not necessarily need to be arrange | positioned at equal intervals, and may be arrange | positioned unevenly. The coil housing portion 213 is a portion that is recessed toward the lower surface side of the base member 21 on the upper surface of the base member 21. The second storage part 214 is disposed in the first storage part 212. The second accommodating portion 214 is a portion that is recessed toward the lower surface side (the lower side in the axial direction) of the base portion 21 on the upper surface of the base member 21. The second accommodating portion 214 has a substantially arc shape when viewed from the axial direction. The second accommodating portion 214 extends in the circumferential direction along the outer surface of the cylindrical portion 211. The third accommodating portion 215 is a portion that is recessed toward the lower surface side of the base portion 21 in the first accommodating portion 212. The third housing part 215 extends radially outward from the second housing part 214 in the first housing part 212. An opening 24 that penetrates the base member 21 in the axial direction is disposed outside the third housing portion 215 in the radial direction.

図１、図２および図３に示すように、第２収容部２１４内には、複数の貫通孔２１２１が配置される。各貫通孔２１２１は、ベース部材２１を軸方向に貫通する。この好ましい実施形態では、ベース部２１に、３つの貫通孔２１２１が配置される。貫通孔２１２１は、第２収容部内２１２内に、周方向に等間隔に配置される。なお、各貫通孔２１２１は、必ずしも等間隔に配置される必要はない。そして、少なくとも１つのコイル収容部２１３は、第２収容部２１４内に配置される。少なくとも一つの貫通孔２１２１の周方向における位置は、少なくとも一つの第３収容部２１５の周方向における位置と等しい。第２収容部２１４内において、少なくとも１つの貫通孔２１２１は、少なくとも一つのコイル収容部２１３を貫通する。 As shown in FIGS. 1, 2, and 3, a plurality of through holes 2121 are arranged in the second housing portion 214. Each through hole 2121 penetrates the base member 21 in the axial direction. In this preferred embodiment, three through holes 2121 are arranged in the base portion 21. The through holes 2121 are arranged in the second housing portion 212 at equal intervals in the circumferential direction. Note that the through holes 2121 are not necessarily arranged at equal intervals. The at least one coil housing part 213 is disposed in the second housing part 214. The position in the circumferential direction of at least one through-hole 2121 is equal to the position in the circumferential direction of at least one third housing part 215. In the second housing part 214, at least one through hole 2121 passes through at least one coil housing part 213.

第３収容部２１５における開口部２４には、段部２４１が配置される。図３に示すように、ベース部材２１の下面側において、溝部２６が開口部２４の端部に配置される。溝部２６は、第１収容部２１２と、軸方向に対向する。溝部２６は、開口部２４から径方向外方に向かって伸びる。溝部２６の延伸方向は、第３収容部２１５の延伸方向と平行である。 A stepped portion 241 is disposed in the opening 24 in the third accommodating portion 215. As shown in FIG. 3, the groove 26 is disposed at the end of the opening 24 on the lower surface side of the base member 21. The groove portion 26 faces the first housing portion 212 in the axial direction. The groove portion 26 extends outward in the radial direction from the opening 24. The extending direction of the groove part 26 is parallel to the extending direction of the third housing part 215.

図４は、配線基板１４の平面図である。図４に示すように、配線基板１４は、円弧部１４１と延伸部１４２と、を有する。円弧部１４１は、軸方向から見たときに第２収容部２１４に対応する略円弧状である。モータ１が組み立てられた際、円弧部１４１は、第２収容部２１４内に配置される。円弧部１４１の厚みは、第２収容部２１４の軸方向深さと同じ、または、第２収容部２１４の軸方向深さよりも小さい。延伸部１４２は、円弧部１４１から伸びる。延伸部１４２は、外部電源等と接続される給電部１４３を、有する。延伸部１４２の厚みは、第３収容部２１５の軸方向深さと同じ、または、第３収容部２１５の軸方向深さよりも小さい。さらに、延伸部１４２の厚みは、溝部２１６の軸方向深さと同じ、または、溝部２１６の軸方向深さよりも小さい。 FIG. 4 is a plan view of the wiring board 14. As shown in FIG. 4, the wiring board 14 includes an arc portion 141 and an extending portion 142. The arc portion 141 has a substantially arc shape corresponding to the second accommodating portion 214 when viewed from the axial direction. When the motor 1 is assembled, the arc portion 141 is disposed in the second housing portion 214. The thickness of the arc portion 141 is the same as the axial depth of the second housing portion 214 or smaller than the axial depth of the second housing portion 214. The extending part 142 extends from the arc part 141. The extending part 142 has a power feeding part 143 connected to an external power source or the like. The thickness of the extending portion 142 is the same as the axial depth of the third housing portion 215 or smaller than the axial depth of the third housing portion 215. Furthermore, the thickness of the extending portion 142 is the same as the axial depth of the groove portion 216 or smaller than the axial depth of the groove portion 216.

図５は、ベース部材２１の平面図であり、配線基板１４がベース部材２１に配置されたときの状態を示す。図１および図５に示すように、配線基板１４がベース部材２１に配置されると、円弧部１４１は第２収容部２１４内に配置される。延伸部１４２は、第３収容部２１５内に配置される。さらに、延伸部１４２は、段部２４１を介して開口部２４を通って、ベース部材２１の下面に配置される。ベース部２１の下面側に配置された延伸部１４２の少なくとも一部は、溝部２６にも配置される。すなわち、延伸部１４２は、第２収容部２１４、第３収容部２１５、および開口部２４を介して、ベース部材２１の上面からベース部２１の下面にわたって這わされる。 FIG. 5 is a plan view of the base member 21 and shows a state where the wiring board 14 is disposed on the base member 21. As shown in FIGS. 1 and 5, when the wiring substrate 14 is disposed on the base member 21, the arc portion 141 is disposed in the second housing portion 214. The extending part 142 is disposed in the third housing part 215. Further, the extending portion 142 is disposed on the lower surface of the base member 21 through the opening portion 24 via the step portion 241. At least a part of the extending portion 142 disposed on the lower surface side of the base portion 21 is also disposed in the groove portion 26. That is, the extending portion 142 is rolled from the upper surface of the base member 21 to the lower surface of the base portion 21 via the second storage portion 214, the third storage portion 215, and the opening 24.

上述したように、円弧部１４１の形状は、第２収容部２１４に対応する形状である。そのため、円弧部１４１が第２収容部２１４から周方向または径方向にはみ出すことが、抑えられる。円弧部１４１の厚みは、第２収容部２１４の軸方向深さと同じ、または、第２収容部２１４の軸方向深さよりも小さい。そのため、円弧部１４１が第２収容部２１４から軸方向に突出することが抑えられる。これにより、円弧部１４１がステータ２２と接触することが抑えられるとともに、モータ１の軸方向寸法を小さくすることができる。 As described above, the arc portion 141 has a shape corresponding to the second accommodation portion 214. Therefore, the arc portion 141 can be prevented from protruding from the second housing portion 214 in the circumferential direction or the radial direction. The thickness of the arc portion 141 is the same as the axial depth of the second housing portion 214 or smaller than the axial depth of the second housing portion 214. Therefore, it is possible to prevent the arc portion 141 from protruding in the axial direction from the second housing portion 214. Thereby, it is possible to suppress the arc portion 141 from coming into contact with the stator 22 and to reduce the axial dimension of the motor 1.

また、図１や図５に示すように、延伸部１４２は、第３収容部２１５に収容される。そのため、ベース部材２１の上面よりも上側に突出することが抑えられる。さらに、延伸部１４２の厚みが第３収容部２１５の軸方向深さと同じ、または、第３収容部２１５の軸方向深さよりも小さいことから、延伸部１４２が第３収容部２１５から軸方向に突出することが防止される。これにより、延伸部２１５がモータ１の他の部位と接触することが抑えられ、モータ１の軸方向寸法を小さく抑えることができる。そして、延伸部１４２の厚みは、溝部２６の軸方向深さと同じ、または、溝部２６の軸方向深さよりも小さい。そのため、溝部２６に這わされた延伸部１４２は、ベース部材２１の下面から軸方向下側へと突出することがなく、薄板状のベース部材２１の厚み（軸方向寸法）内に延伸部１４２が収まる。よって、配線基板１４の厚み分だけ、モータ１全体を軸方向に小さくすることが可能となる。 In addition, as illustrated in FIGS. 1 and 5, the extending portion 142 is accommodated in the third accommodating portion 215. Therefore, it is possible to prevent the base member 21 from protruding above the upper surface. Further, since the thickness of the extending portion 142 is the same as the axial depth of the third accommodating portion 215 or smaller than the axial depth of the third accommodating portion 215, the extending portion 142 extends from the third accommodating portion 215 in the axial direction. Protruding is prevented. Thereby, it is suppressed that the extending | stretching part 215 contacts the other site | part of the motor 1, and the axial direction dimension of the motor 1 can be suppressed small. The extending portion 142 has the same thickness as the axial depth of the groove 26 or smaller than the axial depth of the groove 26. Therefore, the extending portion 142 passed over the groove portion 26 does not protrude downward in the axial direction from the lower surface of the base member 21, and the extending portion 142 is within the thickness (axial dimension) of the thin plate-like base member 21. It will fit. Therefore, the entire motor 1 can be reduced in the axial direction by the thickness of the wiring board 14.

図３に示すように、第４収容部２１６は、ベース部材２１の下面に配置され、第１収容部２１２とは軸方向反対側に位置する。第４収容部２１６は、ベース部材２１の下面に向かって凹む部位である。軸方向から見たときに、第４収容部２１６は、中心軸Ｊ１を中心とした略円環状となっている。第２収容部２１４を貫通する貫通孔２１２１は、第４収容部２１６も貫通する。径方向において、第４収容部２１６は、溝部２６と筒部２１１の開口との間に配置される。 As shown in FIG. 3, the fourth storage portion 216 is disposed on the lower surface of the base member 21 and is positioned on the opposite side to the first storage portion 212 in the axial direction. The fourth housing portion 216 is a portion that is recessed toward the lower surface of the base member 21. When viewed from the axial direction, the fourth housing portion 216 has a substantially annular shape centered on the central axis J1. The through hole 2121 that penetrates the second accommodating portion 214 also penetrates the fourth accommodating portion 216. In the radial direction, the fourth accommodating portion 216 is disposed between the groove portion 26 and the opening of the cylindrical portion 211.

また、図１に示すように、ベース部材２１にステータ２２等を取り付けてベースユニットを組み立てる際には、第４収容部２１６は、略平板状のシール部材５０によって封止される。シール部材５０は、第４収容部２１６の形状に対応した形状となっている。第４収容部２１６の軸方向深さは、シール部材５０の軸方向寸法と同じ、または、シール部材５０の軸方向寸法よりも大きい。シール部材５０が第４収容部２１６を封止した際には、シール部材５０が第４収容部２１６から軸方向に突出することが抑えられる。これにより、モータ１またはディスク駆動装置の軸方向寸法を小さくすることができる。 As shown in FIG. 1, when the base unit is assembled by attaching the stator 22 or the like to the base member 21, the fourth housing portion 216 is sealed by a substantially flat seal member 50. The seal member 50 has a shape corresponding to the shape of the fourth housing portion 216. The axial depth of the fourth housing portion 216 is the same as the axial dimension of the seal member 50 or larger than the axial dimension of the seal member 50. When the seal member 50 seals the fourth housing portion 216, the seal member 50 is prevented from protruding in the axial direction from the fourth housing portion 216. Thereby, the axial direction dimension of the motor 1 or the disk drive device can be reduced.

配線基板１４の円弧部１４１には、コイル２２２から引き出される複数の引出線２２２１が接続される。この好ましい実施形態においては、モータ１が３相モータであるため、３本の引出線２２２１が円弧部１４１に接続される。また、この好ましい実施形態においては、引出線２２２１は、半田付けによって円弧部１４１に接続される。なお、他の方法によって、引出線２２２１が円弧部１４１に接続されていてもよい。 A plurality of lead wires 2221 drawn from the coil 222 are connected to the arc portion 141 of the wiring board 14. In this preferred embodiment, since the motor 1 is a three-phase motor, three lead wires 2221 are connected to the arc portion 141. Moreover, in this preferable embodiment, the leader line 2221 is connected to the circular arc part 141 by soldering. Note that the leader line 2221 may be connected to the arc portion 141 by other methods.

円弧部１４１と引出線２２２１との接続部５１は、それぞれ、第２収容部２１４の貫通孔２１２１内に配置される。接続部５１の軸方向下側の部位は、第４収容部２１６の底部よりも、軸方向上側に位置する。そのため、シール部材５０によって第４収容部２１６が封止された際に、接続部５１がシール部材５０に当たることが防止されている。同様に、接続部５１がベース部材２１の下面よりも、軸方向下側に突出することが防止される。シール部材５０によって第４収容部２１６および貫通孔２１２１がそれぞれ封止されるため、第４収容部２１６や貫通孔２１２１を介してモータ１の内部に、外部から塵などが入ることが防止される。 The connecting portions 51 between the arc portion 141 and the lead wire 2221 are respectively disposed in the through holes 2121 of the second housing portion 214. A portion on the lower side in the axial direction of the connecting portion 51 is located on the upper side in the axial direction with respect to the bottom portion of the fourth housing portion 216. Therefore, the connection portion 51 is prevented from hitting the seal member 50 when the fourth housing portion 216 is sealed by the seal member 50. Similarly, the connecting portion 51 is prevented from projecting downward in the axial direction from the lower surface of the base member 21. Since the 4th accommodating part 216 and the through-hole 2121 are each sealed by the sealing member 50, it is prevented that dust etc. enter the inside of the motor 1 through the 4th accommodating part 216 and the through-hole 2121 from the outside. .

ベース部材２１は、プレス加工を含む工程により、形成される。まず、板状の元部材が順送式の金型内に配置される。元部材に対して一連のプレス加工が行われることにより、筒部２１や第１収容部２１２、第２収容部２１４、第３収容部２１５、開口部２４、貫通孔２１２１、コイル収容部２１３などを有するベース部材２１の形状が成形される。 The base member 21 is formed by a process including press working. First, a plate-shaped original member is placed in a progressive die. By performing a series of press processing on the original member, the cylindrical portion 21, the first accommodating portion 212, the second accommodating portion 214, the third accommodating portion 215, the opening 24, the through hole 2121, the coil accommodating portion 213, and the like. The shape of the base member 21 having is formed.

プレス加工が行われたベース部材２１において、筒部２１１の内側面に切削加工が行われる。これにより、筒部２１１の内側面が滑らかになり、スリーブ４１の挿入を滑らかにすることができるとともに、スリーブ４１の圧入時における変形やスリーブ４１の目詰まり等を防止することができる。なお、筒部２１１以外の箇所において、切削加工が施されてもよい。例えば、金型内において、ベース部材２１の上面全体や下面全体、第１収容部２１２、第２収容部２１４、第３収容部２１５、第４収容部２１６など、筒部２１１以外の箇所に対しても、プレス加工とともに切削加工が行われるようにしてもよい。 In the base member 21 that has been pressed, cutting is performed on the inner surface of the cylindrical portion 211. As a result, the inner surface of the cylindrical portion 211 is smoothed, the sleeve 41 can be smoothly inserted, and deformation when the sleeve 41 is press-fitted and clogging of the sleeve 41 can be prevented. In addition, cutting may be performed in places other than the cylinder part 211. For example, in the mold, the entire upper surface and the lower surface of the base member 21, the first housing portion 212, the second housing portion 214, the third housing portion 215, the fourth housing portion 216, etc. Alternatively, cutting may be performed together with press working.

なお、プレス加工後におけるベース部材２１では、金型による元部材の打ち抜きにより、ダレやバリが、筒部２１１の開口の周縁部、貫通孔２１２１の端部、開口部２４、またはベース部材２１の外周縁などに、形成される。特に、プレス加工によって形成されたバリに対して、切削加工が行われてもよい。切削加工によってバリを除去することにより、筒部２１１の周縁部や開口部２４の端部などが滑らかになり、ベース部材２１の組み立て時等において、ステータ２２などの部品を傷つけることなく取り付けることが可能となる。また、プレス加工が行われたことにより、ベース部材２１下面側における筒部２１１の端部には、ダレが形成されている。 In addition, in the base member 21 after the press working, sagging and burrs are caused by punching of the original member with a mold, so that the peripheral portion of the opening of the cylindrical portion 211, the end portion of the through hole 2121, the opening portion 24, or the base member 21 It is formed on the outer periphery. In particular, cutting may be performed on burrs formed by pressing. By removing burrs by cutting, the peripheral edge of the cylindrical portion 211, the end of the opening 24, and the like become smooth, and the base member 21 can be attached without damaging components such as the base member 21 during assembly. It becomes possible. Moreover, sagging is formed in the edge part of the cylinder part 211 in the lower surface side of the base member 21 by performing the press work.

プレス加工および切削加工が行われたベース部材２１に対しては、さらに、メッキ加工が施される。メッキとしては、例えば、ニッケル系のものが用いられる。メッキ加工によって、メッキの薄膜によって、ベース部材２１全体が覆われることになる。薄膜の厚みは、例えば、２〜１０μｍとすることができる。そのため、軸受機構４の潤滑油や外部環境によるベース部材２１の腐食を、防止することができる。 The base member 21 that has been subjected to pressing and cutting is further subjected to plating. For example, nickel-based plating is used. By plating, the entire base member 21 is covered with a thin film of plating. The thickness of the thin film can be set to 2 to 10 μm, for example. Therefore, corrosion of the base member 21 due to the lubricating oil of the bearing mechanism 4 and the external environment can be prevented.

メッキ加工が施されたベース部材２１において、開口部２４の段部における薄膜の厚みは、ベース部材２１の上面の薄膜の厚みよりも、厚い。これにより、配線基板１４が開口部２４を通ってベース部材２１の上面および下面に這わされる場合に、開口部２４の端部や段部２４１において、配線基板１４が傷つくことが防止される。 In the plated base member 21, the thickness of the thin film at the step portion of the opening 24 is thicker than the thickness of the thin film on the upper surface of the base member 21. This prevents the wiring board 14 from being damaged at the end of the opening 24 and the stepped portion 241 when the wiring board 14 is passed over the upper surface and the lower surface of the base member 21 through the opening 24.

以上、本発明にかかる好ましい実施形態について説明してきたが、上記以外にも本発明はさまざまな変形が可能である。 As mentioned above, although preferred embodiment concerning this invention has been described, in addition to the above, this invention can be variously modified.

例えば、第２収容部２１４に配置される貫通孔２１２１は、一つのみ配置されてもよい。この場合、各コイル２２２からの各引出線２２２１は、それぞれ、１つの貫通孔２１２１へと導かれ、円弧部１４１に半田付け等によって接続される。これにより、複数の貫通孔２１２１を設ける場合と比べて、ベース部材２１の剛性を向上させることができる。 For example, only one through hole 2121 may be disposed in the second storage unit 214. In this case, each lead wire 2221 from each coil 222 is led to one through hole 2121 and connected to the arc portion 141 by soldering or the like. Thereby, the rigidity of the base member 21 can be improved as compared with the case where the plurality of through holes 2121 are provided.

また、第２収容部２１４に複数の貫通孔２１２１が配置される場合であっても、複数の貫通孔２１２１のうち、複数の引出線２２２１が導かれる貫通孔２１２１と、引出線２２２１が導かれない貫通孔２１２１が存在してもよい。 In addition, even when the plurality of through holes 2121 are arranged in the second accommodating portion 214, among the plurality of through holes 2121, the through holes 2121 through which the plurality of lead lines 2221 are guided and the lead lines 2221 are guided. There may be no through-hole 2121.

第２収容部２１４は、凹部形状ではなく、ベース部材２１を軸方向に貫通する貫通部であってもよい。この場合、庇部が、第２収容部２１４の内側面の少なくとも一部に、配置されることが望ましい。庇部は、第２収容部２１４の内側面において、径方向などに突出する。庇部は、第２収容部２１４の周縁部に、少なくとも１つ配置されてもよい。複数の庇部が、第２収容部２１４の周縁部に、配置されてもよい。少なくとも１つの庇部は、第２収容部２１４を囲むように配置されてもよい。これにより、配線基板１４がベース部材２１に配置されるときに、庇部は、配線基板１４の円弧部１４１を軸方向に支持することができる。 The 2nd accommodating part 214 may not be a recessed part shape but the penetration part which penetrates the base member 21 to an axial direction. In this case, it is desirable that the flange portion is disposed on at least a part of the inner side surface of the second accommodating portion 214. The flange portion protrudes in the radial direction or the like on the inner side surface of the second housing portion 214. At least one collar may be disposed on the peripheral edge of the second housing 214. A plurality of flanges may be disposed on the peripheral edge of the second housing part 214. The at least one flange may be arranged so as to surround the second accommodating portion 214. Thereby, when the wiring board 14 is arrange | positioned at the base member 21, the collar part can support the circular arc part 141 of the wiring board 14 to an axial direction.

図６は、モータ１の部分的な断面図である。図７は、ベース部２１Ａの平面図であり、筒部２１１の周囲を示す。以下の説明では、図１に示すベース部２１と同じ構成については、同じ番号を付し、その説明を省略する。 FIG. 6 is a partial cross-sectional view of the motor 1. FIG. 7 is a plan view of the base portion 21 A and shows the periphery of the cylindrical portion 211. In the following description, the same number is attached | subjected about the same structure as the base part 21 shown in FIG. 1, and the description is abbreviate | omitted.

図６および図７に示されるように、ベース部２１Ａは、第２貫通部２１４Ａを有する。第２貫通部２１４Ａは、ベース部２１を軸方向に貫通する。第２貫通部２１４Ａは、筒部２１１の径方向外側に配置される。軸方向から見たときに、第２貫通部２１４Ａの外形は、略円弧状である。第２貫通部２１４Ａの外形は、筒部２１１に沿って周方向に伸びる。 As shown in FIGS. 6 and 7, the base portion 21A has a second through portion 214A. The second penetration part 214A penetrates the base part 21 in the axial direction. The second penetration part 214A is disposed on the radially outer side of the cylindrical part 211. When viewed from the axial direction, the outer shape of the second through portion 214A is substantially arc-shaped. The outer shape of the second through portion 214 A extends in the circumferential direction along the cylindrical portion 211.

図６および図７に示されるように、少なくとも１つの庇部２１４１が、第２貫通部２１４Ａを構成する内側面２１４Ａ１に、配置される。モータ１が組み立てられた際に、庇部２１４１は、配線基板１４の円弧部１４１を軸方向に支持する。この変形例では、２つの庇部２１４１が、内側面２１４Ａ１の径方向外側の部位および径方向内側の部位に、それぞれ配置される。言い換えると、内側面２１４Ａ１には、互いに径方向に対向する１組の庇部２１４１が、配置される。１組の庇部２１４１は、それぞれ、内側面２１４Ａ１に沿って、周方向に伸びる。軸方向から見たときに、周方向に伸びる各庇部２１４１の外形は、それぞれ、略円弧状である。 As shown in FIGS. 6 and 7, at least one flange portion 2141 is disposed on the inner side surface 214A1 constituting the second penetration portion 214A. When the motor 1 is assembled, the flange portion 2141 supports the arc portion 141 of the wiring board 14 in the axial direction. In this modified example, the two flange portions 2141 are respectively disposed on the radially outer portion and the radially inner portion of the inner side surface 214A1. In other words, on the inner side surface 214A1, a pair of flange portions 2141 that are opposed to each other in the radial direction are arranged. Each of the pair of flange portions 2141 extends in the circumferential direction along the inner side surface 214A1. When viewed from the axial direction, the outer shape of each flange portion 2141 extending in the circumferential direction is substantially arc-shaped.

また、内側面２１４Ａ１上の周方向一方側の部位および周方向他方側の部位にも、庇部２１４１は、それぞれ配置される。言い換えると、内側面２１４Ａ１には、周方向に対向する少なくとも１組の庇部２１４１が配置される。軸方向から見たときに、周方向に対向する庇部２１４１の外形は、略矩形である。 In addition, the flange portions 2141 are also arranged on the circumferential side on one side and the circumferential side on the other side of the inner side surface 214A1. In other words, at least one set of flange portions 2141 facing the circumferential direction is disposed on the inner side surface 214A1. When viewed from the axial direction, the outer shape of the flange portion 2141 facing the circumferential direction is substantially rectangular.

各庇部２１４１は、内側面２１４Ａ１から、中心軸Ｊ１に対して垂直な方向に向かって、伸びる。図７に示される例では、複数の庇部２１４１は、径方向または周方向の少なくともいずれか一方に、伸びる。 Each flange portion 2141 extends from the inner side surface 214A1 in a direction perpendicular to the central axis J1. In the example shown in FIG. 7, the plurality of flange portions 2141 extend in at least one of the radial direction and the circumferential direction.

少なくとも１つの庇部２１４１は、少なくとも一つのコイル２２２と、間隙を介して対向する。図６に示される例では、庇部２１４１は、コイル２２２と、軸方向に対向する。さらに、内側面２１４Ａ１において、各庇部２１４１の軸方向の位置は、それぞれ同じである。これにより、配線基板１４が第２貫通部２１４Ａに配置された際に、配線基板１４は、中心軸Ｊ１に対して垂直な方向と略平行に、配置される。 At least one flange 2141 is opposed to at least one coil 222 via a gap. In the example shown in FIG. 6, the flange portion 2141 faces the coil 222 in the axial direction. Further, on the inner side surface 214A1, the positions of the flange portions 2141 in the axial direction are the same. Thereby, when the wiring board 14 is arrange | positioned in 214 A of 2nd penetration parts, the wiring board 14 is arrange | positioned substantially parallel to the direction perpendicular | vertical with respect to the central axis J1.

また、庇部２１４１の数、位置、および形状は、特に限定されるものではない。複数の庇部２１４１が、第２貫通部２１４Ａの内側面２１４Ａ１に、周方向に間隔をおいて配置されてもよい。軸方向から見たときに、一つの庇部２１４１が、第２貫通部２１４Ａの内側面２１４１Ａに沿う略環状であってもよい。複数の庇部２１４１の形状は、それぞれ、異なっていてもよく、同じであってもよい。庇部２１４１の形状は、円弧状、多角形、円形、楕円、これらの組み合わせた形状であってもよく、特に限定されるものではない。 Further, the number, position, and shape of the collar portions 2141 are not particularly limited. The plurality of flange portions 2141 may be disposed on the inner side surface 214A1 of the second through portion 214A at intervals in the circumferential direction. When viewed from the axial direction, the one flange portion 2141 may be substantially annular along the inner side surface 2141A of the second penetration portion 214A. The shapes of the plurality of flange portions 2141 may be different or the same. The shape of the collar portion 2141 may be an arc shape, a polygonal shape, a circular shape, an elliptical shape, or a combination thereof, and is not particularly limited.

さらに、第２収容部２１４が第２貫通部２１４Ａであり、かつ、第３収容部２１５もベース部材２１Ａを軸方向に貫通する貫通部であってもよい。図７に示される例では、ベース部２１Ａが第３貫通部２１５Ａを有する。第３貫通部２１５Ａを構成する内側面２１５Ａ１には、少なくとも１つの庇部２１５１が配置される。庇部２１５１は、第３貫通部２１５Ａの内側面２１５Ａ１から周方向に突出し、かつ、径方向に伸びる。図７では、２つの庇部２１５１が、間隙を介して周方向に対向する。軸方向から見たときに、庇部２１５１の外形は、略矩形である。内側面２１５Ａ１上において、これらの庇部２１５１の軸方向の位置は、それぞれ同じである。これにより、配線基板１４がベース部材２１Ａに配置される際に、延伸部１４２が、中心軸Ｊ１に対して略垂直な方向と略平行に配置される。さらに、図７に示される例では、第２第２貫通部２１４Ａは、第３第３貫通部２１５Ａと接続され、ひとつの貫通部を構成する。なお、第２貫通部２１４Ａは、第３貫通部２１５Ａと、必ずしも接続される必要はない。 Further, the second accommodating portion 214 may be the second penetrating portion 214A, and the third accommodating portion 215 may also be a penetrating portion that penetrates the base member 21A in the axial direction. In the example shown in FIG. 7, the base portion 21A has a third through portion 215A. At least one flange 2151 is disposed on the inner side surface 215A1 constituting the third through portion 215A. The flange portion 2151 protrudes in the circumferential direction from the inner side surface 215A1 of the third penetration portion 215A and extends in the radial direction. In FIG. 7, the two flange portions 2151 are opposed to each other in the circumferential direction via a gap. When viewed from the axial direction, the outer shape of the flange portion 2151 is substantially rectangular. On the inner side surface 215A1, the positions of these flange portions 2151 in the axial direction are the same. Thereby, when the wiring board 14 is disposed on the base member 21A, the extending portion 142 is disposed substantially parallel to the direction substantially perpendicular to the central axis J1. Furthermore, in the example shown in FIG. 7, the second second penetration part 214 A is connected to the third third penetration part 215 A to constitute one penetration part. Note that the second through portion 214A is not necessarily connected to the third through portion 215A.

また、庇部２１５１の数、位置、および形状は、特に限定されるものではない。複数の庇部２１５１が、第３貫通部２１５Ａの内側面２１５Ａ１に、周方向一方側または他方側の面の少なくともいずれか一方に、間隔をおいて配置されてもよい。第３貫通部２１５Ａ内に配置される庇部２１５１は、第２貫通部２１４Ａ内に配置される庇部２１４１と、接続されてもよい。この場合、軸方向から見たときに、庇部２１５１は、庇部２１４１と接続して、略環状を構成してもよい。庇部２１５１の少なくとも一部は、庇部２１４１の少なくとも一部と、接続されてよい。また、庇部２１５１は、庇部２１４１と、間隔をあけて配置されてもよい。庇部２１５１の形状は、それぞれ、異なっていてもよく、同じであってもよい。庇部２１５１の形状は、円弧状、多角形、円形、楕円、これらの組み合わせた形状であってもよく、特に限定されるものではない。庇部２１５１の形状は、庇部２１４１の形状と、同じであってもよく、異なっていてもよい。 Further, the number, position, and shape of the flanges 2151 are not particularly limited. The plurality of flange portions 2151 may be disposed on the inner side surface 215A1 of the third penetration portion 215A at intervals on at least one of the circumferential one side surface and the other side surface. The flange portion 2151 disposed in the third penetration portion 215A may be connected to the flange portion 2141 disposed in the second penetration portion 214A. In this case, when viewed from the axial direction, the flange portion 2151 may be connected to the flange portion 2141 to form a substantially annular shape. At least a part of the flange part 2151 may be connected to at least a part of the flange part 2141. Moreover, the collar part 2151 may be arrange | positioned with the collar part 2141 at intervals. The shapes of the flange portions 2151 may be different or the same. The shape of the flange portion 2151 may be an arc shape, a polygonal shape, a circular shape, an elliptical shape, or a combination thereof, and is not particularly limited. The shape of the flange portion 2151 may be the same as or different from the shape of the flange portion 2141.

さらに、図２および図３では、開口部２４の周方向の幅が、溝部２６の周方向の幅と、略等しい。しかし、開口部２４の周方向幅は、溝部２６の周方向の幅と、必ずしも同じにする必要はない。開口部２４の周方向の幅が、溝部２６の周方向の幅と異なっていてもよい。 Further, in FIGS. 2 and 3, the circumferential width of the opening 24 is substantially equal to the circumferential width of the groove 26. However, the circumferential width of the opening 24 is not necessarily the same as the circumferential width of the groove 26. The circumferential width of the opening 24 may be different from the circumferential width of the groove 26.

図８は、本発明にかかる変形例の一つを示す図であり、ベース部２１Ｂを軸方向下側から見たときの斜視図である。図８では、開口部２４Ｂが、周方向に伸びる。開口部２４Ｂの周方向の幅が、溝部２６の周方向の幅よりも広い。これにより、モータ１の組み立ての際に、配線基板１４の延伸部１４２が開口部２４Ｂに通りやすくなる。その結果、モータ１の組み立てにかかる時間を削減することができる。 FIG. 8 is a view showing one of the modifications according to the present invention, and is a perspective view when the base portion 21B is viewed from the lower side in the axial direction. In FIG. 8, the opening 24B extends in the circumferential direction. The circumferential width of the opening 24 B is wider than the circumferential width of the groove 26. Thereby, when the motor 1 is assembled, the extending portion 142 of the wiring board 14 can easily pass through the opening 24B. As a result, the time required for assembling the motor 1 can be reduced.

また、図２および図３に示されるように、軸方向から見たときに、複数の貫通孔２１２１の外形は、それぞれ、同じ形状となっている。しかしながら、複数の貫通孔２１２１の外形は、それぞれ、異なる形状であってもよい。複数の貫通孔２１２１の大きさ及び向きも、互いに異なるものとしてよい。 As shown in FIGS. 2 and 3, the outer shapes of the plurality of through holes 2121 are the same when viewed from the axial direction. However, the external shapes of the plurality of through holes 2121 may be different from each other. The sizes and directions of the plurality of through holes 2121 may also be different from each other.

図９は、ベース部２１の平面図であり、ベース部２１を部分的に拡大した図である。図９に示すように、軸方向から見たときに、複数の貫通孔２１２１は、中心軸Ｊ１に対して垂直な方向における方向の寸法が最も大きくなる部位を、有している。言い換えると、軸方向から見たときに、各貫通孔２１２１は、少なくとも一の方向に伸びる外形を有する。図９では、軸方向から見たときに、貫通孔２１２１の外形の寸法が最も大きくなる方向が、長手方向となる。貫通孔２１２１において、この方向を長手方向と呼ぶ。軸方向から見たときに、複数の貫通孔２１２１は、それぞれ、筒部２１１に向かう方向がおよそ長手方向となる。図９では、複数の貫通孔２１２１の長手方向は、破線Ｌで、それぞれ示されている。軸方向から見たときに、各貫通孔２１２１の長手方向（各破線Ｌの向き）は、互いに略平行である。これにより、モータ１の組み立て時において、各相の引出線２２２１を、各貫通孔２１２１から、それぞれ、平行に引き出すことができる。その結果、モータ１の組み立てにかかる時間を削減することができる。 FIG. 9 is a plan view of the base portion 21 and is a partially enlarged view of the base portion 21. As shown in FIG. 9, when viewed from the axial direction, the plurality of through holes 2121 have a portion where the dimension in the direction perpendicular to the central axis J1 is the largest. In other words, each through hole 2121 has an outer shape extending in at least one direction when viewed from the axial direction. In FIG. 9, the direction in which the dimension of the outer shape of the through hole 2121 is the largest when viewed from the axial direction is the longitudinal direction. In the through hole 2121, this direction is called a longitudinal direction. When viewed from the axial direction, in each of the plurality of through holes 2121, the direction toward the cylindrical portion 211 is approximately the longitudinal direction. In FIG. 9, the longitudinal directions of the plurality of through holes 2121 are indicated by broken lines L, respectively. When viewed from the axial direction, the longitudinal directions of the through holes 2121 (directions of the broken lines L) are substantially parallel to each other. Thereby, when the motor 1 is assembled, the lead wires 2221 of the respective phases can be drawn out in parallel from the respective through holes 2121. As a result, the time required for assembling the motor 1 can be reduced.

なお、各貫通孔２１２１の外形が伸びる方向（長手方向）は、それぞれ同じであってもよく、全てが異なってもよい。さらには、複数の貫通孔２１２１のうち、外形の伸びる方向が同じである複数の貫通孔２１２１が含まれてもよい。複数の貫通孔２１２１のうち、伸びる方向が異なる複数の貫通孔２１２１があってもよい。各貫通孔２１２１の長手方向における幅は、互いに同じであってもよく、それぞれ異なっていてもよい。また、複数の貫通孔２１２１のうち、長手方向における幅が同じものと長手方向における幅が異なるものとが、含まれていてもよい。さらに、中心軸J1に対して垂直な平面なおいて、複数の貫通孔２１２１の長手方向に対して垂直な方向における幅は、それぞれ、同じであってもよいし、異なっていてもよい。中心軸J1に対して垂直な平面なおいて、貫通孔２１２１の案が手方向における幅は、貫通孔２１２１の長手方向に対して垂直な方向における幅と、同じであってもよいし、異なっていてもよい。 In addition, the direction (longitudinal direction) in which the outer shape of each through-hole 2121 extends may be the same, or all may be different. Furthermore, among the plurality of through holes 2121, there may be included a plurality of through holes 2121 having the same outer shape extending direction. Among the plurality of through holes 2121, there may be a plurality of through holes 2121 having different extending directions. The widths of the through holes 2121 in the longitudinal direction may be the same or different from each other. In addition, among the plurality of through holes 2121, those having the same width in the longitudinal direction and those having different widths in the longitudinal direction may be included. Further, on the plane perpendicular to the central axis J1, the widths of the plurality of through holes 2121 in the direction perpendicular to the longitudinal direction may be the same or different. In the plane perpendicular to the central axis J1, the width of the through hole 2121 in the hand direction may be the same as or different from the width in the direction perpendicular to the longitudinal direction of the through hole 2121. May be.

上記実施形態においては、３つの相（Ｕ相、Ｖ相、およびＷ相）の各引出線２２２１が、配線基板１４に、それぞれ接続される。この場合、コモン線は、ステータ２２側において３つの引出線２２２１と接続され、配線基板１４に直接接続されていない。しかし、コモン線がステータ２２側ではなく、配線基板１４上に接続されてもよい。この場合、第２収容部２１４に配置される貫通孔２１２１の数は、３つの引出線２１２１用とコモン線用のあわせて４つとすることができる。なお、短絡や引出線２１２１同士の互いの接触が防止されるのであれば、コモン線または３つの引出線２１２１のうちのいずれか１つが、他の引出線２１２１と同じ貫通孔２１２１内に配置されてもよい。このような構成とすることにより、貫通孔２１２１の数を少なくすることができる。その結果、貫通孔２１２１が配置されることによってベース部材２１の剛性が低下することが、抑えられる。 In the above embodiment, each lead wire 2221 of three phases (U phase, V phase, and W phase) is connected to the wiring board 14. In this case, the common line is connected to the three lead lines 2221 on the stator 22 side, and is not directly connected to the wiring board 14. However, the common line may be connected to the wiring board 14 instead of the stator 22 side. In this case, the number of the through holes 2121 arranged in the second accommodating portion 214 can be four in total for the three lead wires 2121 and the common wires. If a short circuit or contact between the lead wires 2121 is prevented, any one of the common wire or the three lead wires 2121 is disposed in the same through hole 2121 as the other lead wires 2121. May be. With this configuration, the number of through holes 2121 can be reduced. As a result, it is possible to suppress the rigidity of the base member 21 from being lowered due to the arrangement of the through holes 2121.

また、上記実施形態におけるモータ１は、３相モータである。しかし、モータの相数は特に限定される必要はなく、例えば、単相、２相、５相や７相などの多相モータであってもよい。この場合、引出線２２２１の本数やコモン線の処理方法にあわせて、第２収容部２１４に配置される貫通孔２１２１の数が変更されてもよい。 Further, the motor 1 in the above embodiment is a three-phase motor. However, the number of phases of the motor is not particularly limited, and may be, for example, a single-phase, two-phase, five-phase, or seven-phase multiphase motor. In this case, the number of through-holes 2121 arranged in the second housing portion 214 may be changed according to the number of lead wires 2221 and the common wire processing method.

本発明は、ディスク駆動装置用のモータに利用可能であり、ディスク駆動装置以外の用途のモータにも利用可能である。 The present invention can be used for a motor for a disk drive device, and can also be used for a motor for purposes other than the disk drive device.

上記実施形態および各変形例における構成は、相互に矛盾しない限り適宜組み合わされてよい。 The configurations in the above embodiment and each modification may be combined as appropriate as long as they do not contradict each other.

Ｊ１中心軸
１モータ
１４配線基板
１４１円弧部
１４２延伸部
１４３給電部
２静止部
２１ベース部
２１１筒部
２１２第１収容部
２１３コイル収容部
２１４第２収容部
２１５第３収容部
２１６第４収容部
２１２１貫通孔
２２ステータ
２２１ステータコア
２２２コイル
２２２１引出線
２４開口部
２４１段部
２６溝部
３回転部
３１ロータハブ
３１１ハブ本体
３１２円筒部
３１３ディスク載置部
３２１ロータマグネット
４軸受機構
４１スリーブ
４２ブッシュ
５０シール部材
５１接続部 J1 Central axis 1 Motor 14 Wiring board 141 Arc portion 142 Extending portion 143 Power feeding portion 2 Stationary portion 21 Base portion 211 Tube portion 212 First housing portion 213 Coil housing portion 214 Second housing portion 215 Third housing portion 216 Fourth housing portion 2121 Through-hole 22 Stator 221 Stator core 222 Coil 2221 Lead wire 24 Opening 241 Step part 26 Groove part 3 Rotating part 31 Rotor hub 311 Hub body 312 Cylindrical part 313 Disk mounting part 321 Rotor magnet 4 Bearing mechanism 41 Sleeve 42 Bush 50 Seal member 51 Connection

Claims

A stator having a plurality of coils and a wiring board electrically connected to the stator are arranged, and is a thin plate-like base member used for a disk drive device,
The base member is
A cylindrical tube portion extending in the axial direction around the central axis;
A first accommodating portion capable of accommodating at least a part of the stator around the cylindrical portion;
A plurality of coil housing portions arranged in the circumferential direction around the cylindrical portion in the first housing portion and capable of housing the coils, respectively;
A second accommodating portion that is disposed in the first accommodating portion and extends in the circumferential direction along the cylindrical portion, and is capable of accommodating a part of the wiring board;
A third accommodating portion that extends radially outward from the second accommodating portion and that can accommodate a part of the wiring board;
With
A base member in which an opening that penetrates the base member is disposed in the third housing portion.

The base member according to claim 1,
A base member in which at least one through hole is disposed in the second housing part.

The base member according to claim 2,
A base member in which a part of at least one of the plurality of coils is disposed in the through hole.

The base member according to any one of claims 1 and 3,
A plurality of through holes are arranged in the second housing part,
When viewed from the axial direction, the plurality of through holes each have an outer shape extending in at least one direction, and the directions of the through holes are substantially parallel to each other.

The base member according to any one of claims 1 and 3,
A plurality of through holes are arranged in the second housing part,
When viewed from the axial direction, each of the plurality of through holes has an outer shape extending in at least one direction,
A base member including at least one of the through holes having a different direction.

The base member according to any one of claims 1 to 5,
The second accommodating portion is a recess;
A base member in which a lower surface of the base portion is provided with a fourth housing portion that is a recess connected to the front through hole.

The base member according to claim 6,
A base member in which the fourth housing portion is sealed by a seal member.

The base member according to claim 7,
A base member having an axial dimension of the fourth housing portion equal to or greater than a thickness of the seal member.

The base member according to any one of claims 6 to 8,
The second housing part has at least one coil housing part,
A base member positioned so that the fourth housing portion faces the coil housing portion in the axial direction.

The base member according to any one of claims 1 to 8,
A base member having at least one coil housing portion in the second housing portion.

The base member according to any one of claims 1 to 10,
A base member in which the coil housing portions are arranged at equal intervals in the circumferential direction.

The base member according to any one of claims 1 to 11,
A base member having a depth in the axial direction of the second housing portion equal to or greater than a thickness of the wiring board.

The base member according to any one of claims 1 to 12,
A base member in which a step is disposed in the opening.

The base member according to any one of claims 1 to 12,
A base member in which an end of the opening on the lower surface is provided with a groove that faces the first housing portion in the axial direction and extends radially outward.

The base member according to claim 14,
The base member has a circumferential width different from the circumferential width of the groove.

A base member according to any one of claims 14 and 15,
The depth of the groove in the axial direction is the same as the thickness of the wiring board or a base member larger than the thickness of the wiring board.

The base member according to claim 1,
The second accommodating portion is a second penetrating portion penetrating the base member;
A base member in which at least one collar portion capable of supporting the wiring board is disposed on an inner surface constituting the through portion.

The base member according to any one of claims 1 and 16,
The third housing portion is a third penetration portion that penetrates the base member in the axial direction and is integral with the opening;
The inner surface that constitutes the third through portion is a base member on which at least one flange portion that can support a part of the wiring board is disposed.

The base member according to claim 1,
The wiring board has a plurality of power feeding sections;
A base member in which the plurality of power feeding sections can be arranged in the second housing section.

The base member according to claim 1,
The wiring board is
An arc portion disposed in the second recess portion and an extension portion connected to the arc portion and disposed in the third recess portion;
A base member.

The base member according to claim 20, wherein
A base member in which at least a part of a connecting portion between the lead wire of the coil and the extending portion is located in the through hole.

The base member according to any one of claims 20 and 21,
A base member in which, in a radial direction, the arc portion contacts an outer surface of the cylindrical portion.

The base member according to any one of claims 1 to 22,
The base member is formed by a process including at least press working.

A motor,
A stationary part having the stator;
A rotating part having a rotor magnet opposed to the stator in the radial direction;
A bearing mechanism for rotatably supporting the rotating part with respect to the stationary part about the central axis;
The stationary part is
A base member according to any one of claims 1 to 23;
A wiring board disposed on the upper surface of the base portion;
Having a motor.

A disk drive device of 2.5 type and 7 mm thickness or less,
A motor according to claim 24;
A housing having at least a cover portion and the base member;
At least one disk held by the rotating part;
A disk drive device having: