KR20140087163A - Base for motor and motor including the same - Google Patents

Base for motor and motor including the same Download PDF

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Publication number
KR20140087163A
KR20140087163A KR1020120155769A KR20120155769A KR20140087163A KR 20140087163 A KR20140087163 A KR 20140087163A KR 1020120155769 A KR1020120155769 A KR 1020120155769A KR 20120155769 A KR20120155769 A KR 20120155769A KR 20140087163 A KR20140087163 A KR 20140087163A
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KR
South Korea
Prior art keywords
coil
motor
substrate
base
lead
Prior art date
Application number
KR1020120155769A
Other languages
Korean (ko)
Inventor
황성수
송승열
곽재환
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020120155769A priority Critical patent/KR20140087163A/en
Publication of KR20140087163A publication Critical patent/KR20140087163A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a motor base and a motor having the same, which can improve assemblability and reliability in manufacturing a motor, and a motor according to an embodiment of the present invention includes a core, A base on which a groove-shaped substrate accommodating portion is formed; And a connecting board inserted into the board receiving portion and having the coil connected to an outer surface thereof, wherein the connecting board has a lead ball formed at a portion where the coil is joined, and the lead ball is disposed within a range of the receiving hole .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a base for a motor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a motor, and more particularly, to a motor base and a motor having the same, which can improve assemblability and reliability in manufacturing a motor.

The small spindle motor used in the recording disk driving apparatus is required to have a low current, a low non-repeatable run out (NRRO), an impact resistance and a vibration resistance as the performance of the recording disk driving apparatus is improved.

Particularly, as a spindle motor for a hard disk drive (HDD) is applied to various portable products such as a netbook, a mobile phone, a PMP, and a game machine, research on miniaturization is being actively performed.

In such a hard disk drive, a head driving unit, that is, an HSA (Head Stack Assembly) is installed in the base so that the magnetic head can be moved on the disk, and the magnetic head is lifted by a predetermined height from the recording surface of the disk And performs the function while moving to the position.

The hard disk drive also has a spindle motor for rotating the disk.

Generally, a spindle motor includes a stator in which a coil is wound around a core, and a rotor rotatably installed in the stator. When a voltage is applied to the coil of the stator, the rotor is rotated by the electromagnetic force generated thereby to provide the rotational force.

In such a spindle motor, a coil of a stator provided inside is drawn out to the outside of the spindle motor and is electrically connected to a drive circuit provided outside the spindle motor.

Here, the lead wire of the coil passes through a hole formed in the base, is drawn out to the outside, and is electrically connected to a connection board (for example, a flexible board). The connecting board is electrically connected to the driving circuit of the motor.

However, in the conventional motor, the lead wire of the coil is bonded to the connection board by the soldering method using the conductive solder. Therefore, the connecting board is formed in such a shape that a lead ball protrudes from a joint pad portion to which a lead wire is connected.

If such a lead ball protrudes to the outside of the motor, it will act as a factor to increase the thickness of the motor. Accordingly, there is a demand for a method of preventing the lead ball from protruding to the outside of the motor, thereby minimizing the thickness of the motor.

Japanese Patent Application Laid-Open No. 2009-110611

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a motor base and a motor having the same, which can minimize the thickness of the motor by preventing the lead ball from protruding to the outside .

A base for a motor according to the present invention comprises: a protrusion formed on an inner surface and to which a coil-wound core is coupled; And at least one receiving hole, which is a path through which the coil is drawn out to the outside of the base, is formed in the substrate receiving portion, the substrate receiving portion being formed on an outer surface of the substrate receiving portion to which the connecting substrate to which the coil is connected is coupled .

In the present embodiment, the receiving hole may be formed with a chamfered surface at a corner of a portion in contact with the connecting substrate.

In the present embodiment, the receiving hole may be formed as a sloped surface having a gentle edge at a portion contacting the connecting substrate.

In the present embodiment, the diameter of the receiving hole may be larger than the diameter of the opposite edge formed by the edge of the connecting portion.

According to another aspect of the present invention, there is provided a motor comprising: a base having a core in which a coil is wound on an inner surface thereof, And a connecting board inserted into the board receiving portion and having the coil connected to an outer surface thereof, wherein the connecting board has a lead ball formed at a portion where the coil is joined, and the lead ball is disposed within a range of the receiving hole .

In this embodiment, a portion of the lead board formed on the connecting board due to the load of the lead ball may be disposed inside the receiving hole.

In this embodiment, the receiving hole may be formed to have a diameter larger than the diameter of the lead ball.

In the present embodiment, the connection board may have a lead-out hole at a portion where the lead ball is formed, and the coil may be drawn out to the outside of the base through the lead-out hole.

In the present embodiment, the receiving hole may be formed with a chamfered surface at a corner of a portion in contact with the connecting substrate.

In this embodiment, the substrate may further include a filler filled in the substrate receiving portion of the base.

The motor according to the present invention has a groove-shaped substrate accommodating portion in which a connecting substrate is disposed on a base, and a receiving hole is formed in the substrate accommodating portion. At this time, when the size of the receiving hole is formed to be larger than the size of the lead ball, and a lead ball is formed on the connecting board, a portion of the connecting board where the lead ball is formed is sagged downward due to the load of the lead ball.

Therefore, it is possible to prevent the lead ball from protruding to the outside of the substrate accommodating portion, thereby minimizing the thickness of the motor.

1 is a cross-sectional view schematically illustrating a motor according to an embodiment of the present invention;
2 is an exploded perspective view schematically showing a core in which a base and a coil are wound according to an embodiment of the present invention;
3 is an exploded bottom perspective view schematically showing a connecting substrate and a base according to an embodiment of the present invention;
FIG. 4 is a partial perspective view of the X portion of FIG. 3 where the connecting substrate is coupled to the base; FIG.
5 is a perspective view schematically showing a connecting board according to an embodiment of the present invention.
FIG. 6 is a partial perspective view of the Y portion of FIG. 4 in an enlarged manner; FIG.
7 is a cross-sectional view taken along line AA in Fig.
8 to 9 are diagrams according to other embodiments of the present invention, respectively.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. In addition, the shape and size of elements in the figures may be exaggerated for clarity.

1 is a cross-sectional view schematically showing a motor according to an embodiment of the present invention.

Referring to FIG. 1, a motor 10 according to an embodiment of the present invention is a spindle motor. The motor 100 includes a motor 100 for driving a coil, a base 200 to which the connection board 100 is coupled, A core 250, a hub 340, a shaft 310, and a sleeve 320.

The base 200 may be a fixing member for supporting the rotation of the rotating member including the hub 340 and the core 250 to which the coil 240 is wound may be coupled.

The base 200 may include a protrusion 210 and a body 220. An inner circumferential surface of the protrusion 210 may engage with an outer circumferential surface of the sleeve 320 supporting the shaft 310 to support the sleeve 320 can do.

The protruding portion 210 may have a hollow and protrude upward in the axial direction. A sleeve 320 supporting the shaft 310 may be inserted into the hollow and joined by welding, bonding or press fitting.

The core 250, on which the coil 240 is wound, may be coupled to the outer circumferential surface of the protrusion 210. The rigidity of the protrusion 210 should be secured in order to secure the rotation stability of the motor 10 according to the present embodiment.

The body 220 constituting the base 200 may extend radially outward from the protrusion 210 and may form an internal space of the base 200.

The inner space of the base 200 may be provided as a space in which the core 250 and the hub 340 in which the coil 240 is wound are disposed.

The body portion 220 includes a groove-shaped substrate receiving portion 230 formed by embedding a portion of the body portion 220, that is, the bottom surface of the portion where the core 250 is disposed, toward the core 250 ).

At least one receiving hole 235 may be formed in the substrate receiving portion 230 to form a space through which the lead wire 245 passes and a lead ball is disposed. The configuration of the receiving hole 235 will be described later with reference to Figs. 2 to 7.

The shaft 310 may be supported by the sleeve 320 with a rotating member that rotates in conjunction with the hub 340 in combination with the hub 340.

The hub 340 is a rotating structure rotatably provided with respect to a stationary member including the base 200. The hub 340 has a circular ring-shaped magnet 350 may be provided on the inner circumferential surface.

Here, the magnet 350 can generate the rotational driving force of the motor 10 according to the present embodiment by electromagnetic interaction with the coil 240 wound on the core 250. [

The sleeve 320 is a component for supporting the shaft 310 and can support the shaft 310 such that the upper end of the shaft 310 protrudes axially upward. The sleeve 320 can be formed by forging Cu or Al, or sintering a Cu-Fe alloy powder or SUS powder.

Also, the sleeve 320 may have a shaft hole 310 inserted therein to have a shaft hole having a minute gap with the shaft 310. The oil gap O is filled in the minute gap. Accordingly, the sleeve 320 can stably support the shaft 310 by the radial dynamic pressure through the oil O. [

The radial dynamic pressure through the oil O may be generated by the fluid dynamic pressure portion 322 formed in the inner peripheral surface of the sleeve 320 and the groove of the fluid dynamic pressure portion 322 may be formed in a herringbone shape, Or a bent line shape.

As described above, the fluid dynamic pressure portion 322 is not limited to the one formed on the inner circumferential surface of the sleeve 320, but may be formed on the outer circumferential surface of the shaft 310, which is a rotating member, Leave.

A thrust dynamic pressure portion 324 may be formed on the upper surface of the sleeve 320 to generate a thrust dynamic pressure through the oil O. A thrust dynamic pressure portion 324 may be formed on the upper surface of the sleeve 320, The member can be rotated with a certain levitation force secured.

The shape of the thrust dynamic pressure portion 324 may be a herringbone shape, a spiral shape, or a screw groove shape like the fluid dynamic pressure portion 322, but is not limited thereto and may be a shape capable of providing thrust dynamic pressure All of which can be applied.

The thrust dynamic pressure portion 324 is not limited to the one formed on the upper surface of the sleeve 320 but may be formed on one surface of the hub 340 corresponding to the upper surface of the sleeve 320.

In addition, a base cover 330 may be coupled to the lower portion of the sleeve 320 to seal the lower portion of the sleeve 320.

FIG. 2 is an exploded perspective view schematically showing a core in which a base and a coil are wound according to an embodiment of the present invention, and FIG. 3 is an exploded bottom perspective view schematically showing a connection board and a base according to an embodiment of the present invention.

FIG. 4 is a partial perspective view showing an X portion of the connection board coupled to the base in FIG. 3, in which a filler is omitted, and FIG. 5 is a schematic view of a connection board according to an embodiment of the present invention It is a perspective view. FIG. 6 is a partially enlarged perspective view of the Y portion in FIG. 4, and FIG. 7 is a sectional view taken along line AA in FIG.

2 and 3, a base 200 according to an embodiment of the present invention includes a protrusion 210 on which a core 250 is installed and a body 210 extending radially outward from the protrusion 210. [ (Not shown).

As described above, the body 220 may include a substrate receiving part 230 formed in a predetermined area, that is, the bottom surface of the area facing the core 250 is embedded in the core 250 side.

The substrate receiving portion 230 may be an arc-shaped groove formed along the circumferential direction as a whole. The substrate receiving part 230 provides a predetermined space for accommodating the connection substrate 100 for applying power to the coil 240. Therefore, the connection board 100 can be coupled to the base 200 without protruding to the outside by the board receiving portion 100.

Also, the substrate receiving part 230 may have at least one receiving hole 235 therein. The receiving hole 235 is used as a path through which the lead wire 245 of the coil passes and can be used as a space in which the lead ball P attached to the connecting board 100 is accommodated. This will be described later.

Meanwhile, as shown in FIGS. 1 and 6, the substrate accommodating unit 100 may be filled with a filler (B). That is, when the outgoing line 245 of the coil passes through the receiving hole 235 and is bonded to the bonding pad 112 of the connection substrate 100, the receiving hole 235 and the substrate receiving portion 230 ) May be filled with a filler (B) such as a UV bond.

The filler B can be filled all over the space formed by the substrate receiving portion 230 so as to cover the lead balls P formed by soldering the lead wires 245 and the bonding pads 112.

The connection substrate 100 may be partly coupled to the substrate receiving part 230 formed on the bottom surface of the base 200 and may be a component for applying power to the coil 240 wound on the core 250 .

5, the connecting board 100 includes a coil connecting portion 110 through which a lead wire 245 of a coil is electrically connected, an external connecting portion 130 which is electrically connected to a driving circuit of the base, And an extension part 120 for electrically connecting the external connection part 110 and the external connection part 130.

Here, the coil connecting part 110 may include at least one bonding pad 112 which is a terminal electrically connected to the lead wire 245. 5, a lead-out hole 113 through which the lead wire 245 of the coil is drawn may be formed at the center of the bonding pad 112. [

The lead wire 245 of the coil passes through the receiving hole 235 of the board receiving portion 230 and the lead-out hole 113 of the connecting board 100 in order, To the bonding pad 112 of the semiconductor wafer. At this time, soldering may be used for the bonding, but the present invention is not limited thereto.

On the other hand, as lead wires 245 are bonded to the bonding pads 112, lead balls are formed on the bonding pads 112. Here, the lead ball is formed to have a smaller size than the receiving hole 235 of the base 200, and a part of the lead ball can be received in the receiving hole 235 by the load.

The external connection part 130 may be formed in a terminal shape like the coil connection part 110 and may be connected to a driving circuit by soldering or the like.

The extension portion 120 is provided to electrically connect the coil connection portion 110 and the external connection portion 130. Therefore, when the coil connecting portion 110 and the external connecting portion 130 are disposed very close to each other, the extending portion 120 can be omitted.

The connection substrate 100 according to the present embodiment may be a flexible PCB or a film substrate. However, the present invention is not limited thereto.

The motor 10 according to the present embodiment is configured such that the lead wire 245 passes through the receiving hole 235 of the base 200 and the connecting hole 113 of the connecting board 100 and is drawn out to the outside of the motor, The lead wires 245 and the bonding pads 112 of the connection substrate 100 are bonded to each other through soldering. At this time, a solder ball P is formed on the bonding pad 112 of the connection substrate 100 by soldering.

Since the lead-free ball P is protruded to the outside, the lead-out ball P may be protruded to the outside of the board-receiving portion 230 according to its size. In order to prevent this, the motor 10 according to the present embodiment uses a receiving hole 235.

7, when the diameter of the receiving hole 235 is larger than the diameter of the lead ball P and the lead ball P is formed in the range of the receiving hole 235, 100, the portion where the lead ball P is formed is sagged downward due to the load of the lead ball P.

When the filler B is filled in the remaining space of the substrate accommodating portion 230 in this state, the lead ball P can be fixed in the substrate accommodating portion 230 in a completely accommodated state.

As described above, the motor 10 according to the present embodiment accommodates the lead ball P and a part of the connecting board 100 in the receiving hole 235, so that the height of the end of the lead ball P can be minimized. Therefore, it is possible to prevent the lead ball P from protruding out of the board receiving portion 230, thereby minimizing the thickness of the motor 10.

Meanwhile, the motor base and the motor having the motor base according to the present invention are not limited to the above-described embodiments, and various applications are possible.

8 to 9 are diagrams according to other embodiments of the present invention, respectively.

Referring to FIG. 8, the motor according to the present embodiment has a chamfered surface S formed in the receiving hole 235 of the base 200. The chamfered surface S may be formed at the edge of the portion where the connecting substrate 100 contacts. When the chamfered surface P is formed large, the entire inner peripheral surface of the receiving hole 235 may be formed as the chamfered surface P as shown in FIG.

However, the present invention is not limited thereto, and various applications such as forming only a part of the inner circumferential surface of the receiving hole 235 as a chamfered surface are possible.

Due to such a chamfered surface, the receiving hole 235 of the base 200 according to the present invention may be formed such that the diameter formed by the edge of the portion contacting the connecting substrate 100 is larger than the diameter formed by the opposite edge.

Referring to FIG. 9, the motor according to the present embodiment is configured so that the chamfered surface disclosed in FIG. 8 is expanded to form a very gentle slope S as shown in FIG. When the chamfered surface S is formed in the receiving hole 235, the receiving hole 235 can be enlarged on the surface of the connecting base 100 where the lead ball P is formed, Is located in the receiving hole 235 along a gentle slope of the chamfered surface S so that a larger volume of the lead ball P can be positioned inside the receiving hole 235. [

The above-described motor base and the motor having the motor according to the present invention are not limited to the above-described embodiments, and various applications are possible. Although the motor and the connection board included in the hard disk drive have been described in the above embodiments, the present invention is not limited thereto. Various electronic apparatuses may be used as long as they include a base and a connection board attached thereto.

10: motor 100: connecting substrate
112: bonding pad
200: Base
230: substrate receiving portion 235: receiving hole
240: coil 245: lead wire
250: core 310: shaft
P: Lead ball

Claims (10)

A protrusion formed on the inner surface and to which the core wound with the coil is coupled; And
A substrate-receiving portion formed on an outer surface of the substrate and having a coupling substrate to which the coil is connected;
/ RTI >
Wherein at least one receiving hole, which is a path through which the coil is drawn out of the base, is formed in the substrate accommodating portion.
[2] The apparatus according to claim 1,
And a chamfered surface is formed at an edge of a portion in contact with the connecting board.
[2] The apparatus according to claim 1,
Wherein a corner of the portion contacting the connecting substrate is formed as a gentle slope.
[2] The apparatus according to claim 1,
Wherein a diameter of an edge of a portion contacting the connection substrate is larger than a diameter of an opposite edge formed by the edge.
A base coupled to a core having a coil wound on an inner surface thereof and having a groove-shaped substrate receiving portion formed on an outer surface thereof; And
A connection board inserted into the board receiving portion and connected to the outer surface of the coil;
/ RTI >
Wherein the connecting board is formed with a lead ball at a portion where the coil is joined, and the lead ball is disposed within the range of the receiving hole.
6. The display device according to claim 5,
And a part of the portion where the lead ball is formed due to the load of the lead ball is disposed inside the receiving hole.
6. The apparatus according to claim 5,
And the diameter of the lead ball is larger than the diameter of the lead ball.
6. The display device according to claim 5,
Wherein a lead-out hole is formed at a portion where the lead ball is formed, and the coil is drawn out to the outside of the base through the lead-out hole.
6. The apparatus according to claim 5,
And a chamfered surface is formed at an edge of a portion in contact with the connecting board.
6. The method of claim 5,
And a filler filled in the substrate receiving portion of the base.
KR1020120155769A 2012-12-28 2012-12-28 Base for motor and motor including the same KR20140087163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120155769A KR20140087163A (en) 2012-12-28 2012-12-28 Base for motor and motor including the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120155769A KR20140087163A (en) 2012-12-28 2012-12-28 Base for motor and motor including the same

Publications (1)

Publication Number Publication Date
KR20140087163A true KR20140087163A (en) 2014-07-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022048369A (en) * 2017-12-27 2022-03-25 ミネベアミツミ株式会社 Spindle motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022048369A (en) * 2017-12-27 2022-03-25 ミネベアミツミ株式会社 Spindle motor

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