JP2009247103A - Spindle motor and disc drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spindle motor capable of preventing coming-off and deviation by achieving a rigid fixing structure of a connector to a base member for temporary fixing, and to provide a disc drive device. <P>SOLUTION: A diameter a of an outer-circumferential surface portion 603c that forms an outer diameter of a boss portion 603 is set to be larger than an inner diameter b of an inner wall surface portion 313a of a base member 31 which forms an insertion hole 313. When the boss portion 603 of the connector 60 is pressed and engaged in the insertion hole 313 of the base member 31, the boss portion 603 is engaged and fixed in a bent and contracted state and hence a reaction force of attempting to recovering the bent state outward works on the inner wall surface portion 313a of the base member 31 that forms the insertion hole 313. As a result, a retaining force to the connector 60 of the base member 31 is strong and hence the connector 60 is rigidly fixed at the base member 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spindle motor and a disk drive device including the spindle motor.

  A hard disk device used for a personal computer, a car navigation system or the like is equipped with a spindle motor for rotating a magnetic disk around its central axis. The spindle motor has a stator portion that is fixed to the housing of the hard disk device, and a rotor portion that is mounted with a magnetic disk and rotates relative to the stator portion.

  There are various types of spindle motors, but a so-called shaft-fixed type spindle motor has a structure in which a shaft is fixedly disposed as a part of a stator portion, and the rotor portion rotates around the shaft. In such a fixed shaft type spindle motor, a stator core having a coil formed by winding a conducting wire is fixed to a base member and is disposed to face a rotor magnet which is a permanent magnet. The coil is electrically connected by a connector having electrode terminals for supplying power to the coil, and the connector is fixed to the base member on the lower side. Holes are formed in the connector and the base member, respectively, and lead wires drawn from the coils extend through the holes and are connected to the electrode terminals of the connectors, respectively, and the coils are connected to an external power supply device via the connectors. .

  Such a conventional spindle motor is disclosed in Patent Document 1, for example.

JP-A-11-150901

  However, in the conventional spindle motor, when the connector is fixed to the back surface of the base member with an adhesive during the assembly process of the spindle motor, the adhesive is cured in a state of being positioned on the back surface of the base member after applying the adhesive. However, since it takes time for the adhesive to cure, temporary fixing before curing is important in the assembly process. At this time, the connector may be detached from the base member or may be displaced. For this reason, when assembling, it was necessary to mount and fix a weight or the like in order to avoid displacement of the connector.

  Accordingly, in order to solve the above problems, the present invention provides a spindle motor and a disk drive device that are configured to make the connector firmly fixed to the base member at the time of temporary fixing, and can prevent detachment and displacement. The purpose is to provide.

  In order to solve the above-mentioned problems, the invention according to claim 1 is a stator core having a coil formed by winding a conducting wire, a base member positioned on one end face side of the stator core, and one end face of the base member. A spindle motor provided on a side and fixed to the base member, wherein the base member has a plurality of insertion holes penetrating from one end surface side to the other end surface side of the base member, The connector has the same number of first communication holes as the insertion holes of the base member, a fixed portion having a surface that contacts the one end surface side of the base member, and an outer peripheral surface portion whose outer diameter is larger than the inner diameter of the insertion hole And a substantially hollow cylindrical boss provided in each of the plurality of first communication holes, the boss having a second communication hole communicating with the first communication hole. Part The conductive wire that is fitted and fixed in a state of being in contact with the inner wall surface of the base member constituting the insertion hole by reducing the diameter in the hole, and the lead wire drawn out from the coil is connected to the first communication hole and the second communication hole. It passes through a communication hole made up of a hole and is electrically connected to the connector.

  According to a second aspect of the present invention, there is provided a stator core having a coil formed by winding a conducting wire, a base member positioned on one end surface side of the stator core, and the base member positioned on one end surface side of the base member The base member has a plurality of insertion holes penetrating from one end surface side to the other end surface side of the base member, and the connector includes the connector of the base member. There are as many first communication holes as there are insertion holes, a fixing part having a surface that contacts the one end face side of the base member, an outer peripheral surface part having one or more ribs protruding outward, and the first An inner peripheral surface portion constituting a second communication hole communicating with the communication hole, and a substantially hollow cylindrical boss portion provided in each of the plurality of first communication holes, and the boss portion and the rib Of the circumscribed virtual circle The diameter is larger than the inner diameter of the insertion hole of the base member, and the boss portion and the rib are in contact with the inner wall surface portion of the base member that is reduced in diameter into the insertion hole and constitutes the insertion hole. The conductive wire that is fitted and fixed by the coil and drawn out from the coil passes through the communication hole formed by the first communication hole and the second communication hole, and is electrically connected to the connector. To do.

  The invention according to claim 3 is the spindle motor according to claim 2, wherein the plurality of ribs are arranged on the outer peripheral surface of the boss portion and along the circumferential direction at intervals. To do.

  The invention according to claim 4 is the spindle motor according to claim 2 or 3, wherein the plurality of ribs are arranged at equal intervals on the outer peripheral surface of the boss portion and along the circumferential direction. It is characterized by.

  The invention according to claim 5 is the spindle motor according to any one of claims 2 to 4, wherein each of the plurality of boss portions has a function as a positioning boss portion or a rotation boss portion. The positioning boss part includes at least three ribs, and the rotation-stopping boss part includes at least two ribs.

  The invention according to claim 6 is the spindle motor according to claim 1 or 5, wherein the tip of the boss portion is tapered from the outer peripheral end to the inner peripheral end of the boss portion. And

  According to a seventh aspect of the present invention, in the spindle motor according to the second or sixth aspect, the tip of the rib is tapered from the outer peripheral end to the inner peripheral end. .

  According to an eighth aspect of the present invention, in the spindle motor according to any one of the first to seventh aspects, the opening of the insertion hole of the base member on the side in contact with the connector is gradually formed on the connector side. It is characterized by a taper that spreads out.

  According to a ninth aspect of the present invention, in the spindle motor according to the first or eighth aspect, the second communication hole of the boss portion is configured to be fitted and fixed in the insertion hole of the base member. An inner diameter of the peripheral surface portion is larger than an outer diameter of the conducting wire.

  The invention according to claim 10 is a disk drive device for rotating a disk, wherein the apparatus housing, the spindle motor according to any one of claims 1 to 9 fixed inside the apparatus housing, And an access unit that reads and / or writes information from and to the disk.

  According to the invention described in claims 1 to 10, the base member has a plurality of insertion holes penetrating from one end surface side to the other end surface side of the base member, and the connector is an insertion hole of the base member. A fixed portion having the same number of first communication holes and a surface abutting on one end surface side of the base member, an outer peripheral surface portion having an outer diameter larger than the inner diameter of the insertion hole, and communicating with the first communication hole And a substantially hollow cylindrical boss portion provided in each of the plurality of first communication holes, the boss portion being contracted in the insertion hole. The lead wire that is fitted and fixed in a state of being in contact with the inner wall surface of the base member that forms a diameter of the insertion hole and that is drawn out of the coil includes the first communication hole and the second communication hole. It passes through the communication hole and is electrically connected to the connector. With this configuration, the connector can be temporarily fixed to the base member, and when the boss portion of the connector is press-fitted into the insertion hole of the base member, the boss portion is bent and contracted. Since it is fitted and fixed in a diameter state, the repulsive force to return the deflection acts outward on the inner wall surface of the base member constituting the insertion hole, and as a result, the holding force of the base member to the connector is strong. The connector is firmly fixed to the base member. By adopting such a configuration, the connector is firmly fitted and fixed even to the thin base member, so that the spindle motor can be reduced in thickness and size. In addition, since the boss part is bent and reduced in diameter and press-fitted into the insertion hole of the base member, the tolerance of fitting required for forming the holding position with the base member can be increased, and the manufacturing can be performed. Cost can be lowered. Further, it is possible to prevent the connector from coming off (floating) or to be displaced in the assembly process of the spindle motor, and is less susceptible to external impacts on the spindle motor after assembly, for example, impact such as dropping. It can be a structure.

  In particular, according to the invention described in claim 2, a stator core having a coil formed by winding a conducting wire, a base member positioned on one end surface side of the stator core, and an end surface side of the base member A spindle motor that is positioned and fixed to the base member, wherein the base member has a plurality of insertion holes penetrating from one end surface side to the other end surface side of the base member, The outer peripheral surface portion having the same number of first communication holes as the insertion holes of the base member, the fixing portion having a surface contacting the one end surface side of the base member, and one or more ribs protruding outward And a substantially hollow cylindrical boss provided in each of the plurality of first communication holes, the boss having a second communication hole communicating with the first communication hole. Part and outside on the rib A diameter of a virtual circle that is larger than an inner diameter of the insertion hole of the base member, and the boss portion and the rib are reduced in diameter into the insertion hole to constitute the insertion wall and the inner wall surface portion of the base member The conductive wire that is fitted and fixed in a contact state and drawn out from the coil passes through the communication hole formed by the first communication hole and the second communication hole, and is electrically connected to the connector. . With such a configuration, the connector can be temporarily fixed to the base member, and the ribs protruded from the outer peripheral surface of the boss portion abut against the inner wall surface portion of the base member constituting the insertion hole. Thus, it is possible to prevent the lower surface of the base member from rotating in the circumferential direction of the connector. Also, when the boss part of the connector is press-fitted into the insertion hole of the base member, the boss part and the rib are fitted and fixed in a state of being bent and reduced in diameter, so that a repulsive force to return the bending is inserted. It acts outward on the inner wall surface of the base member constituting the hole, and as a result, the holding force of the base member to the connector is strong, and the connector is firmly fixed to the base member. By adopting such a configuration, the connector is firmly fitted and fixed even to the thin base member, so that the spindle motor can be reduced in thickness and size. Further, since the boss part and the rib are bent and reduced in diameter and press-fitted into the insertion hole of the base member, the tolerance of fitting required for forming the holding position with the base member can be increased. Manufacturing costs can be reduced. Further, it is possible to prevent the connector from coming off (floating) or to be displaced in the assembly process of the spindle motor, and is less susceptible to external impacts on the spindle motor after assembly, for example, impact such as dropping. It can be a structure. In addition, since the rib itself is not crushed and is bent inward to be press-fitted into the insertion hole of the base member, the shape of the rib does not change before and after the press-fitting. Can be used.

  In particular, according to the invention described in claim 3, the plurality of ribs are arranged on the outer peripheral surface of the boss portion and in the circumferential direction at intervals. For this reason, rotation of the connector is restricted, and the ribs are arranged on the outer peripheral surface of the boss part and along the circumferential direction, so that it is difficult to remove from the insertion hole of the base member.

  Particularly, according to the invention described in claim 4, the plurality of ribs are arranged at equal intervals on the outer peripheral surface of the boss portion and along the circumferential direction. For this reason, by arranging the ribs at equal intervals, the connector can be most stably held on the base member with the minimum number of ribs.

  In particular, according to the invention described in claim 5, each of the plurality of boss portions has a function as a positioning boss portion or a rotation boss portion, and the positioning boss portion has at least three ribs, At least two ribs of the rotation-stop boss portion are provided. For this reason, the connector can be positioned and fixed at a predetermined position on the surface of the base member. Further, by providing the rotation-stop boss portion, the connector cannot be rotated in the circumferential direction of the base member.

  In particular, according to the invention described in claim 6, the tip end portion of the boss portion is tapered from the outer peripheral end to the inner peripheral end of the boss portion. For this reason, it becomes easy to press-fit into the insertion hole of the base member.

  In particular, according to the seventh aspect of the present invention, the tip portion of the rib is tapered from the outer peripheral end to the inner peripheral end of the rib. For this reason, it becomes easy to press-fit into the insertion hole of the base member.

  In particular, according to the invention described in claim 8, the opening of the insertion hole of the base member on the side in contact with the connector is tapered so as to gradually spread toward the connector. For this reason, it becomes easy to press-fit the boss part and / or the rib into the insertion hole of the base member.

  In particular, according to the ninth aspect of the present invention, the inner diameter of the inner peripheral surface portion constituting the second communication hole of the boss portion in a state of being fitted and fixed in the insertion hole of the base member is It is larger than the outer diameter. For this reason, even if the boss portion is bent (reduced in diameter) and press-fitted into the insertion hole of the base member, the second communication hole is not closed by the reduced diameter, and the conductor is passed through the second communication hole of the boss portion. It can be pulled out.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following description, for convenience of description, along the central axis L, the rotor portion 4 side is “upper” and the stator portion 3 side is “lower”. However, this does not limit the installation posture of the spindle motor and the disk drive device according to the present invention.

<1. Configuration of disk drive>
FIG. 1 is a longitudinal sectional view of a disk drive device 2 provided with a spindle motor 1 according to an embodiment of the present invention. The disk drive device 2 is a hard disk device that reads information from the magnetic disk 22 and writes information to the magnetic disk 22 while rotating the two magnetic disks 22. As shown in FIG. 1, the disk drive 2 mainly includes an apparatus housing 21, two recording disks (hereinafter simply referred to as “disks”) 22 such as a magnetic disk and an optical disk, an access unit 23, and a spindle motor 1. It has.

  The device housing 21 includes a cup-shaped first housing member 211 and a plate-shaped second housing member 212. The first housing member 211 has an opening in the upper part, and the spindle motor 1 and the access unit 23 are installed on the bottom surface inside the first housing member 211. The second housing member 212 is joined to the first housing member 211 so as to cover the upper opening of the first housing member 211, and the interior of the device housing 21 surrounded by the first housing member 211 and the second housing member 212. In the space 213, two disks 22, the access unit 23, and the spindle motor 1 are accommodated. The internal space 213 of the device housing 21 is a clean space with less dust and dirt.

  Each of the two disks 22 is a disc-shaped information recording medium having a hole in the center. The respective disks 22 are mounted on the hub 42 of the spindle motor 1 and are stacked in parallel with each other at regular intervals via spacers 425. On the other hand, the access unit 23 includes four heads 231 facing the upper and lower surfaces of two disks, an arm 232 that supports each head 231, and a swing mechanism 233 that swings the arm 232. . The access unit 23 swings the four arms 232 along the disk 22 by the swing mechanism 233 and causes the four heads 231 to access a required position of the disk 22, thereby recording the recording surface of each rotating disk 22. Read and write information. The head 231 may perform only one of reading and writing of information with respect to the recording surface of the disk 22.

<2. Spindle motor configuration>
Next, a detailed configuration of the spindle motor 1 will be described. FIG. 2 is a longitudinal sectional view of the spindle motor 1. As shown in FIG. 2, the spindle motor 1 mainly includes a rotor portion 4 that is mounted with a disk 22 and rotates around a predetermined central axis L, and a stator portion that is fixed to the device housing 21 of the disk drive device 2. 3 is provided.

<2-1. Configuration of rotor section>
The rotor unit 4 includes a sleeve 41, a hub 42, and a rotor magnet 43.

  The hub 42 is a member that is fixed or integrally formed on the outer peripheral surface of the sleeve 41 (the outer peripheral surface with respect to the central axis L; the same applies hereinafter) via a minute gap and rotates together with the sleeve 41. The hub 42 has a shape that extends in the radial direction (a direction orthogonal to the central axis L; the same applies hereinafter) around the central axis L. More specifically, the hub 42 includes a first cylindrical portion 421 that is fixed to the outer peripheral surface of the sleeve 41 by shrink fitting or the like, and a flat portion 422 that extends radially outward from the upper end portion of the first cylindrical portion 421. And a second cylindrical part 423 depending from the outer peripheral edge of the flat part 422. The outer peripheral surface 42 a of the second cylindrical portion 423 serves as a contact surface that contacts the inner peripheral portion (the inner peripheral surface or the inner peripheral edge) of the disk 22. Further, a base portion 424 is formed near the lower end portion of the second cylindrical portion 423 so as to protrude outward in the radial direction and whose upper surface serves as a flange surface 42b on which the disk 22 is placed.

  The two disks 22 are stacked in a horizontal posture on the flange surface 42 b of the hub 42. That is, the disk 22 is placed on the flange surface 42b, and the other disk 22 is placed on the top. The upper surface of the upper disk 22 is pressed and fixed by a pressing member 426 attached to the flat portion 422 of the hub 42. Further, the inner peripheral portion of each disk 22 is in contact with the outer peripheral surface 42a of the second cylindrical portion 423, thereby restricting the radial movement of each disk 22. In the present embodiment, both the disk 22 and the hub 42 are mainly made of aluminum. For this reason, the linear expansion coefficients of the disk 22 and the hub 42 are the same or similar, and no excessive stress is generated between the disk 22 and the hub 42 even when the temperature changes.

  On the outer peripheral surface of the second cylindrical portion 423 below the base portion 424, a balance ring 44 for correcting the mass distribution deviation of the rotor portion 4 is attached.

  The inner peripheral surface of the upper portion of the first cylindrical portion 421 of the hub 42 is opposed to the outer peripheral surface of the upper thrust washer 351, which will be described later, with a minute gap therebetween, and the lubricating oil 51 leaks between the outer peripheral surface of the upper thrust washer 351. It is a pumping seal surface that constitutes a pumping seal portion for preventing the above. The pumping seal surface of the hub 42 is formed with a row of pumping grooves for generating a downward dynamic pressure on the lubricating oil 51 mixed between the outer peripheral surface of the upper thrust washer 351 and the pumping seal surface of the hub 42 ( (Not shown). When the hub 42 rotates with respect to the upper thrust washer 351, the lubricating oil 51 is pressurized by the pumping groove array, and the downward fluid dynamic pressure generated in the lubricating oil 51 prevents the lubricating oil 51 from leaking.

  An upper thrust washer 351 and a lower thrust washer 352, which will be described later, are formed of a metal material (for example, an alloy containing aluminum as a main component or an alloy containing copper as a main component) or a resin material having a linear expansion coefficient close to that of the hub. Yes. For this reason, even when the temperature changes, the gap between the outer peripheral surface of the upper thrust washer 351 and the pumping seal surface of the hub 42 becomes extremely large, or the outer peripheral surface of the upper thrust washer 351 and the pumping seal of the hub 42 There is no contact with the surface. Therefore, the leakage of the lubricating oil 51 can be satisfactorily prevented between the outer peripheral surface of the upper thrust washer 351 and the pumping seal surface of the hub 42.

  A cap 427 having a shaft hole at the center is attached to the upper surface of the first cylindrical portion 421 of the hub 42. The cap 427 covers the upper thrust washer 351 and is fixed to the hub 42 with an adhesive applied to the outer periphery of the cap 427.

  The rotor magnet 43 is attached to the lower surface of the flat portion 422 of the hub 42 via a yoke 431. The rotor magnet 43 is arranged in an annular shape so as to surround the central axis L. The inner peripheral surface of the rotor magnet 43 is a magnetic pole surface and faces the outer peripheral surfaces of a plurality of teeth portions 332 of the stator core 33 described later.

  The sleeve 41 is a substantially cylindrical member that is disposed on the outer peripheral surface 35 a of the shaft 35, and the inner peripheral surface 41 a surrounds the shaft 35. An axial direction of the shaft 35 (a direction along the central axis L. The same applies hereinafter) A sleeve 41 having a bearing hole through which the shaft 35 is inserted through a minute gap is provided at an approximately central portion, and an upper thrust washer 351 and a lower portion. It is arranged between the thrust washer 352 and is supported so as to be rotatable relative to the shaft 35.

  Further, the spindle motor 1 according to the present embodiment has a radial dynamic pressure bearing portion formed in a minute gap between a shaft radial bearing surface positioned on the radially outer side of the shaft 35 and a sleeve radial bearing surface of the sleeve 41 facing the shaft radial bearing surface. A radial dynamic pressure groove array 45 that induces fluid dynamic pressure in the lubricating oil 51 during relative rotation is formed on at least one of the shaft radial bearing surface and the sleeve radial bearing surface.

  In the present embodiment, herringbone-shaped radial dynamic pressure groove rows 45 and 45 are formed on the outer peripheral surface 35a of the shaft 35 in the vertical direction at intervals in the axial direction.

  For this reason, when the hub 42 and the sleeve 41 are integrally rotated with respect to the shaft 35 by the rotation of the motor 1, the lubricating oil filled in the minute gap is pumped by the radial dynamic pressure groove rows 45 and 45. The sleeve 41 fixed or integrally processed with the hub 42 by inducing fluid dynamic pressure in the shaft 51 is supported in the radial direction while being in non-contact with the shaft 35 and is rotatably supported with respect to the shaft 35.

  In this embodiment, the radial dynamic pressure groove array 45 is formed in a herringbone shape. However, the present invention is not limited to this, and a spiral shape or a tapered land shape may be used. Any groove pattern may be used as long as it functions as a fluid dynamic pressure bearing. Good. Further, although the radial dynamic pressure groove array 45 is formed on the outer peripheral surface 35a of the shaft 35, it may be formed on the inner peripheral surface 41a of the sleeve 41 which is a sleeve radial bearing surface.

  Further, the spindle motor 1 according to the present embodiment has a small gap between the sleeve thrust bearing surface located above or below the sleeve 41 and the washer thrust bearing surface of the upper thrust washer 351 or the lower thrust washer 352 facing the sleeve thrust bearing surface. A thrust dynamic pressure bearing portion, and at least one of the washer thrust bearing surface and the sleeve thrust bearing surface, a thrust dynamic pressure groove array 46 (upper thrust motion described later) that induces fluid dynamic pressure in the lubricating oil 51 during relative rotation. The pressure groove row 46a and the lower thrust dynamic pressure groove row 46b are collectively referred to as 46).

  In the present embodiment, as shown in FIG. 3A, a spiral thrust dynamic pressure groove array 46a is formed on the upper surface 41b of the sleeve 41 so as to spread radially outward from the central axis L side. . Further, as shown in FIG. 3B, a spiral thrust dynamic pressure groove array 46b is formed on the lower surface 41c of the sleeve 41 so as to spread radially outward from the central axis L side.

  Therefore, when the hub 42 and the sleeve 41 are integrally rotated with respect to the shaft 35 by the rotation of the motor 1, the lubricating oil filled in the minute gaps is pumped by the thrust dynamic pressure groove rows 46a and 46b. The sleeve 41 fixed to or integrated with the hub 42 by inducing fluid dynamic pressure in the shaft 51 is supported in the axial direction while being in non-contact with the upper and lower thrust washers 351 and 352, and is rotatable with respect to them. Supported.

  In this embodiment, the thrust dynamic pressure groove array 46 is formed in a spiral shape. However, the present invention is not limited to this, and may be a herringbone shape or a tapered land shape, and any groove pattern may be used as long as it functions as a fluid dynamic pressure bearing. Good. Further, although the upper thrust dynamic pressure groove array 46a is formed on the upper surface 41b of the sleeve 41, it may be formed on the lower surface of the upper thrust washer 351 which is a washer thrust bearing surface. Further, although the lower thrust dynamic pressure groove array 46b is formed on the lower surface 41c of the sleeve 41, it may be formed on the upper surface of the lower thrust washer 352 which is a washer thrust bearing surface.

  Also, as shown in FIGS. 2 and 3, one or more oil grooves 41d are formed on the outer peripheral surface of the sleeve 41 along the axial direction as a flow path through which the lubricating oil 51 flows from above to below. (In FIG. 3A and FIG. 3B, there are three oil grooves 41d). In the present embodiment, one or a plurality of oil grooves 41 d are formed on the outer peripheral surface of the sleeve 41, but the inner peripheral surface of the hub 42 and the outer peripheral surface of the sleeve 41 and the inner peripheral surface of the hub 42 are formed. It may be.

<2-2. Configuration of stator section>
Returning to FIG. The stator unit 3 includes a shaft 35, a base member 31, a stator 32, and a coil 34.

  The shaft 35 is a substantially columnar member disposed along the central axis L. The shaft 35 is fixed to the base member 31 in a state where the lower end portion is fitted into the through hole 311 of the base member 31.

  An annular upper thrust washer 351 and lower thrust washer 352 projecting radially outward are fixed or integrally processed to the outer peripheral surface 35a of the shaft 35 by an adhesive, press-fitting, or the like. The upper and lower thrust washers 351 and 352 are arranged in a pair on the outer peripheral surface of the shaft 35 with an interval in the axial direction so as to sandwich the sleeve 41 from above and below. Specifically, the upper thrust washer 351 is disposed above the sleeve 41 via a minute gap, and the lower thrust washer 352 is disposed below the sleeve 41 via a minute gap.

  The base member 31 is formed of a metal material such as aluminum, and is fixed to the device housing 21 of the disk drive device 2 with screws. A through hole 311 that penetrates the base member 31 along the central axis L is formed at the center of the base member 31. Further, a substantially cylindrical holder portion 312 protruding in the axial direction is formed on the outer peripheral side of the through hole 311 of the base member 31.

  Next, the stator 32 fitted and fixed to the base member will be described with reference to FIGS. The stator 32 is fitted to the outer peripheral surfaces of the plurality of teeth portions 331 and the holder portions 312 of the base member 31 that protrude radially outwardly from the tips and are centered on the central axis. A stator core 33 having an annular core back 332 that connects the radially inner ends of 331 at equal intervals, and a coil formed by winding a conductive wire (coil wire) 341 around each of the plurality of tooth portions 331 34. The stator core 33 is formed of a laminated steel plate in which a plurality of electromagnetic steel plates such as substantially annular silicon steel plates are laminated in the axial direction.

  The spindle motor 1 according to the present embodiment is a three-phase (U-phase, V-phase, and W-phase) motor, and has 12 teeth portions 332u1, 332u2, 332u3, 332u4, 332v1, 332v2, arranged in the circumferential direction, 332v3, 332v4, 332w1, 332w2, 332w3, 332w4 (generally called teeth portion 332) are assigned to three phases so as to have four teeth portions 332 per phase, and each of these teeth portions 332 has a U phase. Conductive wire 341u, V-phase conductive wire 341v, and W-phase conductive wire 341w (generally referred to as conductive wire 341) are wound to provide U-phase, V-phase, and W-phase coils 34u, 34v, and 34w ( The generic name is a coil 34).

  Here, since the conducting wires 341u, 341v, and 341w wound around the teeth portion 332 belonging to the same phase need to be electrically connected, first, one conducting wire 341u is connected to the teeth portion 332u1. After being wound around, it is routed to the adjacent tooth portion 332u2, and then wound around the tooth portion 332u2. Similarly, by winding the conductive wire 341u around the teeth portions 332u3 and 332u4, the four U-phase coils 34u are electrically connected to each other. The same applies to the other two phases, in which one conductive wire 341v and 341w is wound around the teeth portions 332v1 and 332w1, respectively, and then routed to the adjacent teeth portions 332v2 and 332w2, and then wound around the teeth portions 332v2 and 332w2. It is turning. Therefore, the four V-phase coils 34v and the four W-phase coils 34w are electrically connected to each other.

  In order to supply power to the coils 34u, 34v, and 34w for the three phases, a plurality of insertion holes 313 that penetrate from the upper surface to the lower surface of the base member 31 are formed. In this embodiment, since it is a three-phase motor, three insertion holes 313u, 313v, and 313w (generally called insertion holes 313) are formed, and each insertion hole 313u, 313v, and 313w has a U phase and a V phase. , W-phase coils 34u, 34v, 34w are opened in the base member 31 so as to be located in the vicinity of the lower part of each. With such a configuration, for example, a conducting wire 341u that feeds power to the U-phase coil 34u is drawn out of the insertion hole 313u and connected to an electrode plate 604 of the connector 60 described later, and indirectly connected to an external not shown. It becomes the structure connected to this power supply device. Note that the conductive wire 341 drawn from the coil 34 is preferably coated with an insulating film or the like in order to prevent short circuit with other members.

  In the present embodiment, the number of insertion holes 313 is three for a three-phase motor. However, the number of insertion holes 313 is not limited to three, and the insertion holes 313u, 313v, U-phase, V-phase, and W-phase are not limited to this. The structure which forms the penetration hole for common wires besides 313w may be sufficient. It can also be applied to motors other than three-phase motors.

<3. First Embodiment>
Next, the connector 60 according to the first embodiment will be described with reference to FIGS.

<3-1. Connector configuration: fixed part and boss part>
FIG. 6A is a top view of the connector 60, and FIG. 6B is an exploded perspective view of the main part of the connector 60. FIG. 7 is a cross-sectional view taken along line BB of the connector 60 in FIG. Electrical connection of the conducting wire 341 is performed by a connector 60 including an electrode plate 604. The connector 60 according to the present embodiment has the same number of first communication holes 602a as the insertion holes 313 of the base member 31, and has a fixed portion 602 having a surface that comes into contact with the lower surface of the base member 31, and a first communication hole 602a. And a boss portion 603 having a substantially hollow cylindrical shape provided at a position corresponding to each of the plurality of first communication holes 602a. The fixed portion 602 and the boss portion 603 (connector 60) are molded from an insulating material such as a flexible resin material. As the resin material used for the fixing portion 602 and the boss portion 603, a material having heat resistance such as engineer plastic, a low thermal expansion coefficient, and excellent dimensional stability against heat is preferable. Examples thereof include polybutadiene terephthalate (PBT), polyethylene terephthalate (PET), and liquid crystal polymer (LCP). Moreover, what strengthened resin with glass fiber etc. may be used. Here, the connector 60 is described by being divided into the fixing portion 602 and the boss portion 603, but this is divided for convenience of explanation, and in the embodiment, the fixing portion 602 and the boss portion 603 are made of molten resin. The material is integrally molded by injection molding or the like.

  The first communication hole 602a and the second communication hole 603a will be described in detail later. When the boss portion 603 of the connector 60 is press-fitted into the insertion hole 313 of the base member 31 and the connector 60 is fixed to the lower surface of the base member 31. The communication hole 601 including the first communication hole 602 a and the second communication hole 603 a is formed so as to overlap with the insertion holes 313 of the base member 31 in the axial direction. In addition, an electrode plate 604 made of a flat conductive material is disposed and fixed on the lower surface of the fixing portion 602 as an energizing means, and a lead-out hole 604a through which the conducting wire 341 is drawn out is also connected to the electrode plate 604. The same number of communication holes 601 are formed at positions overlapping the holes 601. With this configuration, the terminals of the conductive wires 331u, 331v, and 331w drawn from the U-phase, V-phase, and W-phase coils 33u, 33v, and 33w are connected to the communication hole 601 of the connector 60 (the base member 31). The insertion hole 313) and the lead-out hole 604a of the electrode plate 604 pass in order, and are fixed to the electrode plate 604 with an adhesive or the like and electrically connected thereto. Thus, when a predetermined power is applied from an external power supply device (not shown), the conductive wire 341 is energized through the electrode plate 604 of the connector 60. When a drive current flows through the coil 34, a radial magnetic flux is generated in the tooth portion 332. The magnetic flux generated in the tooth portion 332 interacts with the magnetic flux of the rotor magnet 43 to generate torque for rotating the rotor portion 4 about the central axis L.

<3-2. Boss configuration>
The shape of the insertion hole 313 of the base member 31 and the shape of the boss portion 603 of the connector 60 are not particularly limited, but each of the insertion holes of the base member 31 can be configured to be easily press-fitted as follows. The boss portion 603 of the connector 60 can be easily press-fitted into the 313.

  For example, as shown in FIG. 7, the upper end surface of the boss portion 603 is formed in a tapered shape having a gradually decreasing diameter from the outer peripheral surface portion 603 c to the inner peripheral surface portion 603 b of the boss portion 603. Specifically, a configuration is adopted in which a tapered inclined surface 603d is inclined from a predetermined position of the outer peripheral surface portion 603c extending from below to the inside of the second communication hole 603a. With such a configuration, when the boss portion 603 of the connector 60 is reduced in diameter (bent) and press-fitted into the insertion hole 313 of the base member 31, the inclined surface 603d of the tip portion of the boss portion 603 is It functions as a guide surface for guiding the boss portion 603 into the insertion hole 313, and the boss portion 603 of the connector 60 can be easily press-fitted into the insertion hole 313 of the base member 31.

  Further, the case where the opening of the insertion hole 313 of the base member 31 on the connector 60 side is formed in a tapered shape that gradually spreads toward the connector 60 side will be described with reference to FIG. Specifically, as shown in FIG. 8 (a), an inclined surface 313b that is inclined outward from the insertion hole 313 from a predetermined position of the inner wall surface portion 313a extending downward from above is used. Further, as shown in FIG. 8B, the tapered shape may be formed not only in the vicinity of the opening of the insertion hole 313 but also in the entire insertion hole 313. That is, the inner wall surface 313a of the base member 31 constituting the insertion hole 313 can be configured as a tapered inclined surface 313b that gradually spreads from the upper opening to the lower opening of the insertion hole 313. With such a configuration, when the boss portion 603 of the connector 60 is reduced in diameter (bent) and press-fitted into the insertion hole 313 of the base member 31, the inclined surface 313 b of the opening portion of the insertion hole 313 is formed. The boss portion 603 functions as a guide surface for guiding the boss portion 603 into the insertion hole 313, and the boss portion 603 of the connector 60 is easily press-fitted into the insertion hole 313 of the base member 31.

  The “predetermined position” in the description of the tapered inclined surface 603 d of the boss portion 603 and the tapered inclined surface 313 b of the inner peripheral surface portion 313 a of the base member 31 refers to the boss portion into the insertion hole 313 of the base member 31. It refers to a position where it is possible to form an inclined surface sufficient to facilitate the press-fitting of 603 and guide the boss portion 603.

  Next, a configuration in which the boss portion 603 of the connector 60 is press-fitted and fixed in the insertion hole 313 of the base member 31 will be described with reference to FIGS. 9 and 10. FIG. 9 is a longitudinal sectional view (AA sectional view in FIG. 5) of the configuration in which the stator 32 is fitted to the holder portion 312 of the base member 31, and the outer diameter a of the boss portion 603 and the insertion hole 313. It is a figure explaining the relationship with the internal diameter b. FIG. 10A is a diagram illustrating the press-fitting and FIG. 10B is a diagram illustrating a state in which the press-fitting is fixed.

  First, a magnitude relationship is set between the outer diameter a of the boss part 603 and the inner diameter b of the insertion hole 313 so that the boss part 603 of the connector 60 is press-fitted into the insertion hole 313 of the base member 31. Specifically, as shown in FIG. 9, the diameter a of the outer peripheral surface portion 603 c constituting the outer diameter of the boss portion 603 is set to be larger than the inner diameter b of the inner wall surface portion 313 a of the base member 31 constituting the insertion hole 313. To do. As shown in FIG. 8B, when the inner wall surface 313a of the base member 31 is a tapered inclined surface 313b that gradually spreads from the upper opening to the lower opening of the insertion hole 313, the upper opening The inner wall surface 313a on the side portion side has an inner diameter smaller than that of the inner wall surface portion 313a on the lower opening side, and the inner wall surface 313a on the upper opening side has the inner diameter b of the inner wall surface portion 313a of the base member 31 described above. Is equivalent to. That is, the minimum inner diameter of the inner wall surface portion 313a of the base member 31 constituting the insertion hole 313 corresponds to the inner diameter b.

  Next, the boss portion 603 of the connector 60 is press-fitted into the insertion hole 313 of the base member 31. At this time, since the outer diameter a of the boss portion 603 is larger than the inner diameter b of the insertion hole 313, the boss portion 603 is bent inwardly and reduced in diameter in the second communication hole 605a as shown in FIG. The outer peripheral surface portion 603c of the boss portion 603 is pressed into the inner wall surface portion 313a of the base member 31 constituting the insertion hole 313 and is fitted and fixed. The configuration after being press-fitted and fixed is shown in FIG.

  As described above, the connector 60 can be temporarily fixed to the base member 31, and when the boss portion 603 of the connector 60 is press-fitted into the insertion hole 313 of the base member 31, the boss portion 603 is bent. Since it is fitted and fixed in a reduced diameter state, a repulsive force to return bending acts on the inner wall surface 313a of the base member 31 constituting the insertion hole 313, and as a result, the base member 31 with respect to the connector 60 The holding force is strong, and the connector 60 is firmly fixed to the base member 31. By adopting such a configuration, the connector 60 is firmly fitted and fixed to the base member 31 having a small thickness, so that the spindle motor 1 can be reduced in thickness and size. Further, since the boss portion 603 is bent and reduced in diameter and is press-fitted into the insertion hole 313 of the base member 31, the tolerance for fitting required for forming the holding position with the base member 31 is increased. Manufacturing costs can be reduced. Furthermore, it is possible to prevent the connector 60 from coming off (floating) or being displaced from the base member 31 in the assembly process of the spindle motor 1, so that the external impact on the spindle motor 1 after the assembly, for example, an impact such as a drop, can be prevented. The structure can be made less susceptible to influence.

  In the state where the boss portion 603 of the connector 60 is bent and contracted in the insertion hole 313 of the base member 31, the inner diameter c of the inner peripheral surface portion 603b constituting the second communication hole 603a of the boss portion 603 is the same. The outer diameter d of the conducting wire 341 is set to be larger. With such a configuration, even when the boss portion 603 has a reduced diameter and is fitted in the insertion hole 313, the second communication hole 603a is not closed by the reduced diameter, and the second communication hole 603a of the boss portion 603 is not closed. The conducting wire 341 can be pulled out.

  The height of the boss portion 603 (the size in the axial direction) protrudes from the upper opening of the insertion hole 313 when the boss portion 603 of the connector 60 is press-fitted into the insertion hole 313 of the base member 31. The size is such that it does not contact the coil 34, and preferably the size corresponding to the axial width of the inner wall surface 313 a of the base member 31 that constitutes the insertion hole 313.

  The thickness (diameter in the radial direction) of the boss portion 603 is sufficient to be able to bend and reduce the diameter, and the repulsive force (the inner wall surface portion of the base member 31) to return the deflection. This is a thickness that can be generated during press-fitting.

<4. Second Embodiment>
Next, a second embodiment in which ribs 605 are provided around the boss portion 603 will be described with reference to FIGS. In addition, about the position of the boss | hub part 603 of the connector 60, and another member, while omitting the detailed description of the structure equivalent to the said 1st Embodiment, it demonstrates using the same code | symbol.

<4-1. Structure of rib>
The boss portion 603 of the connector 60 according to the present embodiment has one or a plurality of ribs 605 projecting outward on the outer peripheral surface portion 603c. The rib 605 is made of a single material with the connector 60.

  Next, the case where there are a plurality of ribs 605 formed on the outer peripheral surface portion 603c of the boss portion 603 of the connector 60 will be described. As shown in FIGS. 12A and 13, the diameter e of a virtual circumscribed circle T1 (indicated by a two-dot chain line in the figure) circumscribing the outer peripheral surface portion 605a of the two ribs 605 is larger than the inner diameter of the insertion hole of the base member. Is set to be larger. With such a configuration, the boss portion 603 and the rib 605 are bent and reduced in diameter, and are press-fitted with the outer peripheral surface portion 605a of the rib 605 in contact with the inner wall surface portion 313a of the base member 31 constituting the insertion hole 313. And fixed. The configuration after being press-fitted and fixed is shown in FIG.

  The case where there is one rib 605 formed on the outer peripheral surface portion 603c of the boss portion 603 of the connector 60 will be described. As shown in FIG. 12B, the diameter f of a virtual circumscribed circle T2 (indicated by a two-dot chain line in the figure) that inscribes the outer peripheral surface portion 603c of the boss portion 603 and the outer peripheral surface portion 605a of the rib 605 is formed in the insertion hole 313. It sets so that it may become larger than the internal diameter b of the inner wall face part 313a of the base member 31 to comprise. With such a configuration, the boss portion 603 and the rib 605 are bent and reduced in diameter, and are press-fitted with the outer peripheral surface portion 605a of the rib 605 in contact with the inner wall surface portion 313a of the base member 31 constituting the insertion hole 313. And fixed.

  First, the arrangement positions of the plurality of ribs 605 on the outer peripheral surface portion 603c of the boss portion 603 will be described. As shown in FIG. 11, the plurality of ribs 605 are arranged at intervals on the outer peripheral surface of the boss portion 603 and along the circumferential direction. Therefore, when the boss portion 603 having a plurality of ribs 605 arranged on the outer peripheral surface thereof is press-fitted into the insertion hole 313 of the base member 31, it is difficult to come out from the insertion hole 313 and the connector on the lower surface of the base member 31 is used. The rotation of 60 is restricted. The plurality of ribs 605 are desirably arranged at equal intervals on the outer peripheral surface of the boss portion 603 and along the circumferential direction. With such a configuration, the connector 60 can be held on the base member 31 most stably with the minimum number of ribs.

  Further, by making a difference in the number of ribs 605 provided on each of the plurality of boss portions 603, each boss portion 603 can be given a function as a positioning boss portion or a rotation boss portion. Specifically, providing at least two ribs 605 serves as a rotation boss, and providing at least three ribs 605 serves as a positioning boss. With this configuration, the connector 60 can be positioned and fixed at a desired position on the lower surface of the base member 31. Further, by providing the rotation-stop boss portion, the connector 60 can be prevented from rotating in the circumferential direction on the lower surface of the base member 31. In FIG. 11, two ribs 605 are provided on the boss portions 603, 603 at both ends of the three boss portions 603, 603, 603 arranged as rotation boss portions, and the middle boss portion 603 is also provided. Is provided with six ribs 605 as positioning bosses.

  The shape of the rib 605 is not particularly limited, but it is easy to press-fit and fit the boss portion 603 of the connector 60 into the insertion hole 313 of the base member 31 by configuring each of the ribs 605 to be easily press-fitted as follows. Become.

  For example, as shown in FIG. 14, the upper end surface of the rib 605 is formed in a tapered shape having a gradually decreasing diameter from the outer peripheral surface portion 605 a to the inner peripheral surface portion 605 b of the rib 605. Specifically, a configuration is adopted in which a tapered inclined surface 605c is inclined from a predetermined position of the outer peripheral surface portion 605a extending upward from below to inward of the second communication hole 603a. With such a configuration, when the boss portion 603 and the rib 605 of the connector 60 are reduced in diameter (bent) and press-fitted into the insertion hole 313 of the base member 31, the inclined surface 605c of the tip portion of the rib 605 is fitted. However, it functions as a guide surface for guiding the boss portion 603 and the rib 605 into the insertion hole 313, and the boss portion 603 and the rib 605 of the connector 60 are easily press-fitted into the insertion hole 313 of the base member 31.

  The “predetermined position” in the description of the tapered inclined surface 605c of the rib 605 is to facilitate press-fitting of the boss portion 603 into the insertion hole 313 of the base member 31 and to guide the boss portion 603. It refers to a position where a sufficient inclined surface can be formed.

  Further, as shown in FIG. 15, a tapered inclined surface 605c is formed on the upper end surface of the rib 605, and a tapered inclined surface 603d is also formed on the upper end surface of the boss portion 603 shown in the first embodiment. A configuration is also possible. At this time, the inclined surface 605c of the rib 605 and the inclined surface 603d of the boss portion 603 can be configured to be substantially on the same plane. With this configuration, when the boss portion 603 and the rib 605 of the connector 60 are reduced in diameter (bent) and press-fitted into the insertion hole 313 of the base member 31, the inclined surface 605c of the tip portion of the rib 605 is formed. The boss portion 603 and the rib 605 serve as a guide surface for guiding the boss portion 603 and the rib 605 into the insertion hole 313, and the boss portion 603 and the rib 605 of the connector 60 are easily press-fitted into the insertion hole 313 of the base member 31.

  As described above, the connector 60 can be temporarily fixed to the base member 31, and the rib 605 protruded from the outer peripheral surface of the boss portion 603 contacts the inner wall surface portion 313 a of the base member 31 constituting the insertion hole 313. In contact therewith, it is possible to prevent the base member 31 from rotating in the circumferential direction of the connector 60 on the lower surface. Further, when the boss portion 603 of the connector 60 is press-fitted into the insertion hole 313 of the base member 31, the boss portion 603 and the rib 605 are fitted and fixed in a state of being bent and reduced in diameter, so that the bending is returned. The repulsive force to be exerted acts outward on the inner wall surface 313a of the base member 31 constituting the insertion hole 313. As a result, the holding force of the base member 31 to the connector 60 is strong, and the connector 60 is firmly attached to the base member 31. Fixed. By adopting such a configuration, the connector 60 is firmly fitted and fixed to the base member 31 having a small thickness, so that the spindle motor 1 can be reduced in thickness and size. Further, since the boss portion 603 and the rib 605 are bent and reduced in diameter and are press-fitted and fitted into the insertion hole 313 of the base member 31, the fitting tolerance required for forming the holding position with the base member 31 is increased. The size can be increased, and the manufacturing cost can be reduced. Furthermore, it is possible to prevent the connector 60 from coming off (floating) or being displaced from the base member 31 in the assembly process of the spindle motor 1, so that the external impact on the spindle motor 1 after the assembly, for example, an impact such as a drop, can be prevented. The structure can be made less susceptible to influence. In addition, since the rib 605 itself is not crushed and is bent inwardly to be press-fitted and fitted into the insertion hole 313 of the base member 31, the shape of the rib 605 does not change before and after the press-fitting. The provided connector 60 can be reused.

<5. Modification>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, as shown in FIG. 1, the base member 31 and the first housing member 211 are separate members, the insertion hole 313 is formed in the base member 31, and the boss portion 603 is fitted therein. Although the structure to fix together was described, as shown in FIG. 17, the base member 31 and the 1st housing member 211 may be comprised by the single member. In this case, the insertion hole 313 is formed at the same position as the position formed in the base member 31 in the above embodiment of the first housing member 211.

  In the above embodiment, the configuration in which the fixing portion 602 and the boss portion 603 are integrally formed is described. However, the present invention is not limited to this, and the fixing portion 602 and the boss portion 603 are separately molded. , It may be configured integrally later.

  Moreover, in the said embodiment, although the shape of the boss | hub part 603 was made into the substantially hollow cylindrical shape, it is not limited to this, As shown in FIG. 18, it is good also as a hollow polygonal cylinder shape. In this case, the hollow polygonal cylindrical boss portion 603 forms a polygonal shape of the outer peripheral surface portion 603b constituting the outer diameter of the boss portion 603 and / or the inner peripheral surface portion 603c constituting the second communication hole 603a ( In FIG. 18, the outer peripheral surface portion 603b and the inner peripheral surface portion 603c of the boss portion are both formed in a hexagonal shape.

  Further, in the first embodiment, the case of the boss portion 603 without the rib 605 and the case of the boss portion 603 with the rib 605 are described in the second embodiment, respectively. For example, as shown in FIG. These may be combined.

  Further, as shown in FIG. 19, by providing a notch portion 603 e at the lower end portion of the boss portion 603 and / or the lower end portion of the rib 605, it becomes easy to press fit into the insertion hole 313 of the base member 31. In this case, when the boss portion 603 and the rib 605 are press-fitted into the insertion hole 313 of the base member 31, the boss portion 603 and the rib 605 are directed inward of the second communication hole 603a with the notch portion 603e as a fulcrum. To bend and bend.

  Further, the size of the axial width g of the rib 605 formed on the outer peripheral surface of the boss portion 603 is not particularly limited as long as it can be press-fitted into the insertion hole 313 of the base member 31. Good. As shown in FIG. 20, the axial width g of the rib 605 can be set smaller than the axial size h of the boss portion 603.

<6. Other>
In the above embodiment, the shaft-fixed outer rotor motor has been described. However, the present invention can also be applied to a shaft rotation type motor and an inner rotor motor. In addition, in the case of a shaft rotation type motor, there is a configuration in which a sleeve housing is sandwiched between a sleeve and a hub, but in that case, the sleeve, the hub, and the sleeve housing may be configured from the same member. These may be manufactured separately and then fixed or integrally processed.

  Moreover, in the said embodiment, although the structure which forms the rib 605 on the outer peripheral surface of the boss | hub part 603 and press-fits it in the insertion hole 313 of the base member 31, it was not limited to this, The insertion hole 313 is not limited to this. A rib may be formed on the inner wall surface portion 313a of the base member 31 to be configured, and the boss portion 603 not provided with the rib 605 may be reduced in diameter and press-fitted. Also in this case, it is possible to form a tapered inclined surface on the end surface of the rib on the connector side 60.

It is a longitudinal cross-sectional view of a disk drive device. It is a longitudinal cross-sectional view of a spindle motor. (A) is a top view of the sleeve, and (b) is a bottom view of the sleeve. It is explanatory drawing of a stator. It is the top view which fitted the stator to the base member. (A) is a top view of the connector, and (b) is an exploded perspective view of the main part of the connector 60. It is BB sectional drawing of the connector in Fig.6 (a). FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5, where (a) is a view when a part of the inner wall surface is tapered, and (b) is a view when the entire inner wall surface is tapered. It is a figure explaining the relationship between the outer diameter of a boss | hub part, and the internal diameter of an insertion hole. (A) It is the figure which showed a mode that the boss | hub part of a connector reduced in diameter in the insertion hole of a base member, and was press-fitted and fitted, (b) is a figure which shows the state press-fitted and fixed. (A) is a top view of a connector, (b) is a principal part disassembled perspective view of a connector. (A) It is a figure which defines the outer diameter of the virtual circumscribed circle in case of two ribs (plural), (b) is a figure which defines the outer diameter of the virtual circumscribed circle in the case of one rib. It is a figure explaining the relationship between the outer diameter of the virtual circumscribed circle which two ribs formed, and the inner diameter of an insertion hole. It is CC sectional drawing in FIG. 12, and is a figure in case the front-end | tip of a rib is a taper shape. It is CC sectional drawing in FIG. 12, and is a figure in case the front-end | tip of a rib and the front-end | tip of a boss | hub part are taper-shaped. (A) It is the figure which showed a mode that the boss | hub part and rib of a connector reduced in diameter in the insertion hole of a base member, and it was a press-fit fitting, (b) is a figure which shows the state by which the press-fit fitting was fixed. . It is a longitudinal cross-sectional view of a disk drive device in case the 1st housing member and a base member are comprised from the single member. It is a top view of the connector which concerns on a modification. It is a longitudinal cross-sectional view of the connector which concerns on a modification, and is a figure at the time of providing a notch part in the lower end part of a boss | hub part and a rib. It is a longitudinal cross-sectional view of the connector which concerns on a modification, and is a figure in case the width of the axial direction of a rib is smaller than the magnitude | size of the axial direction of a boss | hub part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spindle motor 2 Disk drive device 3 Stator part 31 Base member 313 Insertion hole 313a Inner wall surface part 313b Inclined surface 34 Coil 341 Conductor 4 Rotor part 60 Connector 601 Communication hole 602 Fixed part 602a 1st communication hole 603 Boss part 603a 2nd communication hole 603b Inner peripheral surface portion 603c Outer peripheral surface portion 603d Inclined surface 604d Notch portion 604 Electrode plate 604a Lead-out hole 605 Rib 605a Outer peripheral surface portion 605b Inner peripheral surface portion 605c Inclined surface T1, T2 Virtual circumscribed circle L Central axis outer diameter a Boss portion Diameter of outer peripheral surface portion b Inner diameter of inner wall surface portion of base member constituting insertion hole c Inner diameter of inner peripheral surface portion constituting second communication hole of boss portion d Outer diameter of conductive wire e Outer peripheral surface portion of boss portion and outer peripheral surface portion of rib Diameter of the virtual circumscribed circle inscribed in the circle f circumscribes the outer peripheral surface of the plurality of ribs Axial dimensions of width h boss portion in the axial direction of the diameter g ribs virtual circumscribing circle

Claims (10)

A stator core having a coil formed by winding a conducting wire;
A base member located on one end face side of the stator core;
A connector positioned on one end surface side of the base member and fixed to the base member;
A spindle motor comprising:
The base member has a plurality of insertion holes penetrating from one end surface side to the other end surface side of the base member,
The connector is
A fixing portion having the same number of first communication holes as the insertion holes of the base member, and having a surface in contact with one end surface side of the base member;
It has an outer peripheral surface portion whose outer diameter is larger than the inner diameter of the insertion hole, and an inner peripheral surface portion constituting a second communication hole communicating with the first communication hole, and is provided in each of the plurality of first communication holes. A hollow cylindrical boss,
With
The boss portion is fitted and fixed in a state of being in contact with an inner wall surface portion of the base member that is reduced in diameter in the insertion hole and constitutes the insertion hole,
The spindle motor according to claim 1, wherein the conductive wire drawn out from the coil passes through a communication hole including the first communication hole and the second communication hole and is electrically connected to the connector. A stator core having a coil formed by winding a conducting wire;
A base member located on one end face side of the stator core;
A connector positioned on one end surface side of the base member and fixed to the base member;
A spindle motor comprising:
The base member has a plurality of insertion holes penetrating from one end surface side to the other end surface side of the base member,
The connector is
A fixing portion having the same number of first communication holes as the insertion holes of the base member, and having a surface in contact with one end surface side of the base member;
An outer peripheral surface portion having one or a plurality of ribs protruding outward and an inner peripheral surface portion constituting a second communication hole communicating with the first communication hole are provided in each of the plurality of first communication holes. A substantially hollow cylindrical boss part,
With
The diameter of the virtual circle circumscribing the boss part and the rib is larger than the inner diameter of the insertion hole of the base member,
The boss part and the rib are fitted and fixed in a state in which the boss part and the rib are contracted in the insertion hole and contact the inner wall surface part of the base member constituting the insertion hole,
The spindle motor according to claim 1, wherein the conductive wire drawn out from the coil passes through a communication hole including the first communication hole and the second communication hole and is electrically connected to the connector. The spindle motor according to claim 2, wherein
The spindle motor according to claim 1, wherein the plurality of ribs are arranged at intervals on the outer peripheral surface of the boss portion and along the circumferential direction. In the spindle motor according to claim 2 or 3,
The spindle motor, wherein the plurality of ribs are arranged at equal intervals on the outer peripheral surface of the boss portion and along the circumferential direction. The spindle motor according to any one of claims 2 to 4,
Each of the plurality of boss portions has a function as a positioning boss portion or a rotation-stop boss portion, the positioning boss portion has at least three ribs, and the rotation-stop boss portion has at least two ribs, A spindle motor characterized by comprising each. In the spindle motor according to claim 1 or 5,
A spindle motor characterized in that a tip end portion of the boss portion is tapered from an outer peripheral end to an inner peripheral end of the boss portion. In the spindle motor according to claim 2 or 6,
The spindle motor according to claim 1, wherein a tip end portion of the rib is tapered from an outer peripheral end to an inner peripheral end of the rib. The spindle motor according to any one of claims 1 to 7,
The spindle motor characterized in that the opening of the insertion hole of the base member on the side in contact with the connector has a tapered shape that gradually spreads toward the connector side. The spindle motor according to claim 1 or 8,
A spindle motor characterized in that an inner diameter of an inner peripheral surface portion constituting a second communication hole of the boss portion in a state of being fitted and fixed in the insertion hole of the base member is larger than an outer diameter of the conducting wire. A disk drive for rotating the disk,
A device housing;
The spindle motor according to any one of claims 1 to 9, which is fixed inside the device housing;
An access unit for reading and / or writing information to and from the disk;
A disk drive device comprising:

Images