WO2009120046A2 - 무브러시 진동모터 - Google Patents
무브러시 진동모터 Download PDFInfo
- Publication number
- WO2009120046A2 WO2009120046A2 PCT/KR2009/001585 KR2009001585W WO2009120046A2 WO 2009120046 A2 WO2009120046 A2 WO 2009120046A2 KR 2009001585 W KR2009001585 W KR 2009001585W WO 2009120046 A2 WO2009120046 A2 WO 2009120046A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vibration motor
- bracket
- cogging torque
- rotor
- coil
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses
- H02K7/063—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses integrally combined with motor parts, e.g. motors with eccentric rotors
Definitions
- the present invention relates to a brushless vibration motor, and more particularly, an object of the present invention relates to a vibration motor capable of forming a cogging torque generating portion in the thickness of a non-magnetic body.
- BLDC brushless DC
- the brushless vibration motor includes a case 10, a bracket 20 ′, a stator 30, a rotor 40, a fixed shaft 50, and a cogging torque generator 62.
- the case 10 is configured to cover the bracket 20 'and the fixed shaft 50 in the form of a cap.
- the bracket 20 ' is made of a nonmagnetic material, and a rib 22 in which the fixed shaft 50 is inserted is formed at the center thereof.
- the stator 30 has a structure fixed to the upper surface of the bracket 20 ', which has a trapezoidal shape on the upper surface of the circuit board 31 and generates one or more coils 32 and a Hall element. And a controller 33 in the form of a chip which functions as a driving IC.
- control unit 33 is configured to detect the polarity of the magnet 42 to be described later to generate an electrical signal, and determine the current direction of the coil 32 according to the polarity of the magnet 42.
- the rotor 40 is provided with a rotor yoke 44, a magnet 42 having a predetermined number of poles, a weight 43, and a metal bearing 52 on a rotor body 41 made of a resin material. It is rotated by an action and provided in the case 10.
- the magnet 42 is configured to interact with the electromagnetic force generated in the coil 32 to generate a force such as attractive force and repulsive force and to rotate at a predetermined speed by this force.
- the metal bearing 52 is coupled to the center of the rotor yoke 44 and fitted to the fixed shaft 40 to minimize frictional resistance when the rotor 40 rotates.
- the weight 43 functions to generate an oscillation force by providing an eccentric mass when the rotor 40 rotates.
- One end of the fixed shaft 50 is fitted into the rib 22 provided at the 20 ', and the other end is fixed between the shaft grooves of the case 10, so that the rotor 40 can be rotated.
- the slide is supported by the washer 51.
- the cogging torque generation unit 62 serves to smoothly start the engine without stopping the starting point by stopping the rotor 40 at a predetermined position, so that a predetermined equal interval is maintained on the upper surface of the bracket 20 '. Bound and made of soft magnetic material.
- the cogging torque generating unit 62 is designed to have a number (two) maintaining equal intervals of 180 °, and when the magnets 42 are six poles, the cogging torque generating unit ( 62) is designed as a number (three) to maintain an equal interval of 120 °.
- each cogging torque generating unit 62 maintaining a predetermined equal interval is provided with a protrusion 61 'for reinforcing the strength of the cogging torque, while the central portion of the coiling coil 32 is wound.
- the installation position is configured to deviate by a predetermined angle from the central portion of the.
- the conventional brushless vibration motor includes a non-magnetic bracket 20 'and a soft magnetic material (or ferromagnetic material) having a cogging torque generating portion 62 as a separate component, and these are laminated by welding or adhesive to be bonded. Therefore, the number of parts, accordingly, it is difficult to thin, there is a problem that the assembly process is complicated.
- the circuit board 31 has a problem in that it is inconvenient to handle, such as the part price increases according to the width, the thin and flexible film form easily bent during handling in the motor assembly process, considering that the price is expensive.
- the present invention has been made to solve the above problems, an object of the present invention to provide a vibration motor that can form a cogging torque generating portion in the thickness of the non-magnetic body.
- Another object of the present invention is to fix the coil to the bracket so as not to overlap the circuit board to reduce the material cost according to the size reduction of the circuit board, the process is simplified by fixing the coil directly to the bracket, the thickness of the coil by the thickness of the circuit board It can be increased to generate a higher rotational torque and thereby to provide a vibration motor that can improve the rotational vibration force.
- the vibration motor according to the present invention includes a stator, a rotor, and a case.
- the stator includes a nonmagnetic body and a cogging torque, which is a magnetic body accommodated within the thickness of the body.
- a bracket configured to be negative, at least one coil fixed to an upper surface of the bracket to generate an electromagnetic force so that the rotor rotates, and a circuit board fixed directly to the upper surface of the bracket without overlapping the coil.
- the body is formed of austenitic stainless steel that is a nonmagnetic material
- the cogging torque generating portion is preferably formed by transforming to a magnetic material by reducing the thickness by cold processing a specific portion of the body.
- the body is formed with an opening
- the cogging torque generating unit is preferably a plurality of cogging torque pieces coupled to the opening.
- the cogging torque segment is made of a linear
- the cogging torque segment and the opening may be formed in the concave-convex shape of the mutual coupling surface.
- circuit board is preferably formed in the shape of any one of a semi-circular, rectangular or polygonal within half of the area of the upper surface of the bracket is located inside the bracket.
- the rotor may include a disc-shaped rotor yoke having a shaft coupling portion through which a fixed shaft penetrates at a center thereof, and a protrusion protruding upwardly; A metal bearing inserted into the shaft coupling part; A weight through which the protrusion penetrates and is coupled to one side of the upper surface of the rotor yoke; And a magnet provided on the bottom surface of the rotor yoke.
- the protrusion of the rotor yoke is preferably riveted or caulking (coulking) in the state penetrating the through hole of the weight.
- At least one stopper is formed at an upper end or a lower end of the axial coupling part to protrude inward to prevent separation of the metal bearing.
- a jaw is formed at the top or bottom of the metal bearing in close contact with the stopper.
- the process is simplified by fixing the coil directly to the bracket, and the thickness of the coil can be increased by the thickness of the circuit board. There is an effect that can generate a higher rotational torque and thereby improve the rotational vibration force.
- the weight can also be easily coupled to the rotor yoke.
- 1 and 2 show a conventional brushless vibration motor.
- 3 to 5 show an embodiment according to the present invention.
- FIG. 6 shows the rotor of the embodiment shown in FIG. 3.
- Figure 11 shows the production rate of processed organic martensite according to the cold rolling rate for each stainless steel type.
- an embodiment 100 according to the present invention includes a stator 130, a rotor 120, and a case 110.
- the case 110 is configured to cover the stator 130 and the rotor 120 in the form of a cap.
- the stator 130 includes a bracket 131, a cogging torque segment 132, an insulating coating layer 133, a circuit board 134, a coil 136, and a fixed shaft 137.
- the bracket 131 has ribs 138 through which the fixed shaft 137 penetrates at the center of the upper surface thereof, and a plurality of openings are formed around the fixed shaft 137 and a cogging torque segment is formed in the opening. 132 is joined by indentation, welding or adhesive.
- the rib 138 is integrally formed in the body of the bracket 131, the structural strength is improved, slimming is possible, and cogging torque is smoothly generated.
- bracket 131 has a body having an opening formed of a nonmagnetic material, and the cogging torque segment 132 is formed of a magnetic material.
- the cogging torque segment 132 and the opening are two linearly arranged at equal distances from the center of the rib 138 of the bracket 131, and the extension lines thereof are arranged in parallel.
- the circuit board 134 is fixed to the upper surface of the bracket 131 so as not to overlap with the coils 136, and the shape of the circuit board 131 is formed in any one of a quadrangle or a polygon. In this embodiment, the rectangular shape is formed. At this time, the use area of the circuit board 134 has an advantage that can be reduced by more than half.
- the circuit board 134 is provided with a driving IC (Integrated Circuit) (135) having a built-in hall sensor except for the coil 136 on the upper surface and a hole corresponding to the rib 138 is formed through the circuit board.
- a driving IC Integrated Circuit
- the substrate 134 is fixed, a hole is inserted into the rib 138 to fix the position.
- the coil 136 is not bonded to the circuit board 134, the area is reduced, and thus the material cost can be reduced even when using a flexible PCB. This makes it easy to reduce the material cost.
- At least one coil 136 is fixed to the upper surface of the bracket 131 without overlapping the circuit board 134 so that at least one of the coils 136 may be generated to generate an electromagnetic force to rotate the rotor 120, in this embodiment Illustrates that two are provided.
- the coil 136 is first coated with an insulating paint or an adhesive on the upper surface of the bracket 131 and then adhesively fixed.
- the stator 130 of the vibration motor of the present embodiment reduces the size of the circuit board 134 by attaching and fixing the circuit board 134 and the coil 136 so as not to overlap each other when they are attached to the upper surface of the bracket 131. This reduces material costs.
- This part of the circuit board 134 excluding the coil 136 is not limited by the thickness of the circuit board 134, which is relatively economical because it uses a relatively inexpensive thick hard PCB instead of the expensive thin flexible PCB. This is a benefit.
- the process is simplified by directly adhering the coil 136 to the bracket 131, and since the height is removed by the thickness of the circuit board 134 at the bottom of the coil 136, the thickness of the coil and the circuit board is reduced. There is a margin to increase the winding thickness of the coil 136 to generate a higher rotational torque thereby improving the rotational vibration force.
- the rotor 120 of the present embodiment includes a rotor yoke 123, a metal bearing 122 inserted into an axial coupling part, and a weight coupled to one side of an upper surface of the rotor yoke 123. 124 and the magnet 121.
- the rotor yoke 123 is formed in a disc shape, and the shaft coupling portion through which the fixed shaft 137 passes is formed integrally with the rotation center.
- the metal bearing 122 is fitted to the fixed shaft 137 in a state of firmly press-fitting the shaft coupling portion to minimize frictional resistance when the rotor 120 rotates.
- the stopper 123b is formed at the upper end of the shaft coupling part to protrude inwardly (inner diameter direction) to prevent the metal bearing 122 from being separated upward by an external impact.
- the stopper 123b may be formed in various ways. However, in the present embodiment, the stopper 123b may be formed by pressing a predetermined portion of the round part with a press while the round part is formed at the upper end of the shaft coupling part. Can be.
- a jaw 122a is formed at an upper end of the metal bearing 122 to correspond to the stopper 123b to which the stopper 123b is in close contact.
- the shaft coupling portion is formed such that its inner circumferential surface has a sufficient height to cover the entire outer circumferential surface of the metal bearing 122.
- the metal bearing 122 and the axial coupling portion has a large adhesion area, so that the metal bearing 122 can be more firmly coupled and fixed.
- the rotor yoke 123 and the shaft coupling portion is formed integrally, it can be seen that the rotor yoke 123 is connected to the upper end of the shaft coupling portion, it is formed stepped downward.
- the reason for forming in this way is to provide a coupling space of the weight 124.
- the weight 124 may be provided within the thickness of the shaft coupling portion, thereby making it possible to reduce the thickness and improve the bonding strength.
- the rotor yoke 123 and the weight 124 are formed with rivet holes 123a and 124a at corresponding positions, respectively. According to the present embodiment, the weights 124 can be easily coupled by riveting the rivet holes 123a and 124a.
- a rib through which a fixed shaft penetrates is integrally formed, and is press-fitted to the opening 131a of the body 131 and the opening 131a of the body 131.
- Cogging torque intercept 132a.
- the openings 131a and the cogging torque segments 132a each have three linear shapes, and the extension lines of the cogging torque segments 132a are arranged in a triangular shape.
- the body 131 is made of a nonmagnetic material, and the cogging torque segment 132a is formed of a magnetic material.
- the cogging torque segment 132a and the opening 131a are formed in a concave-convex shape with each other. That is, a protrusion is formed at the edge of the cogging torque segment 132a, and a groove is formed in the opening 131a of the body 131 corresponding to the shape and size of the protrusion.
- the coupling strength between the cogging torque segment 132a and the opening 131a is improved. Therefore, the separation can be prevented even during an external impact such as a drop.
- the magnetic flux density is higher than when the uneven surface is not formed in the cogging torque segment 132a, thereby improving the cogging torque.
- the opening 131b and the cogging torque segment 132b each have four linear shapes, and the extension lines of the cogging torque segments 132b are arranged in a quadrangular shape.
- the non-magnetic body 131 is formed of austenitic stainless steel, the cogging torque generating portion 131c by cold-processing a specific portion of the body 131 to reduce the thickness It is formed by transforming into a magnetic body.
- austenitic stainless steel is a nonmagnetic material having a permeability of 2 or less, although there is a difference for each grade.
- some metastable austenite is transformed into strain-induced martensite and becomes magnetic. It is known that the processed organic martensite phase is generated as the austenite becomes unstable, and the austenitic stainless steel increases with the amount of deformation when deformed by external stress, and the permeability also increases.
- FIG. 11 shows the processing organic martensite generation rate for each steel type according to cold rolling rate.
- SUS304 Cr-8Ni-Fe alloy
- the processing organic martensite production rate is changed according to the thickness reduction by cold rolling. It can be seen that the investment rate increases with the increase.
- the present embodiment uses the characteristics of the austenitic stainless steel, and forms the body 131 of austenitic stainless steel and cold forges a specific portion of the body 131 to form a magnetic material.
- the cogging torque generation unit 131c is formed by transforming.
- the formation of the cogging torque generating unit 131c as described above is to cold-form due to compression, tension, etc. by pressing a specific portion of the body 131.
- the press working is performed at a temperature below room temperature to reduce the thickness by 30% or more.
- the magnetic body portion and the non-magnetic body portion may be integrally formed as the same material.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims (10)
- 스테이터와, 로터와, 케이스를 포함하는 진동모터에 있어서,상기 스테이터는,비자성체인 몸체와, 상기 몸체의 두께 내에 수용되는 자성체인 코깅토크 발생부로 구성되는 브라켓과,상기 브라켓의 상면에 고정되어 상기 로터가 회전되도록 전자기력을 발생하는 적어도 하나의 코일과,상기 코일과 중첩되지 않으면서 상기 브라켓의 상면에 직접 고정되는 회로기판을 포함하는 것을 특징으로 하는 진동모터.
- 제1항에 있어서,상기 몸체는 비자성체인 오스테나이트계 스테인리스강으로 형성되며, 상기 코깅토크 발생부는 상기 몸체의 특정부위를 냉간가공하여 두께를 감소시킴으로써 자성체로 변태되어 형성되는 것을 특징으로 하는 진동모터.
- 제1항에 있어서,상기 몸체에는 개구부가 형성되며, 상기 코깅토크 발생부는 상기 개구부에 결합되는 복수의 코깅토크 절편인 것을 특징으로 하는 진동모터.
- 제3항에 있어서,상기 코깅토크 절편은 선형으로 이루어지는 것을 특징으로 하는 진동모터.
- 제4항에 있어서,상기 코깅토크 절편과 개구부는 상호 결합면이 요철형상으로 이루어지는 것을 특징으로 하는 진동모터.
- 제1항에 있어서,상기 회로기판은 상기 브라켓의 내부에 위치되는 형상이 상기 브라켓 상면의 면적 절반 이내에서 반원형 또는 사각형 또는 다각형 중 어느 하나의 형태로 형성되는 것을 특징으로 하는 진동모터.
- 제1항에 있어서,상기 로터는,중심에 고정축이 관통하는 축결합부가 형성되고, 상방으로 돌출된 돌출부가 구비되는 원판형의 로터요크;상기 축결합부에 삽입되는 메탈베어링;상기 돌출부가 관통하는 관통홀이 형성되어 상기 로터요크의 상면 일측에 결합되는 웨이트; 및상기 로터요크의 저면에 구비되는 마그네트;를 포함하는 것을 특징으로 하는 진동모터.
- 제7항에 있어서,상기 로터요크의 돌출부가 상기 웨이트의 관통홀을 관통한 상태에서 리벳결합 또는 코킹(caulking)결합되는 것을 특징으로 하는 진동모터.
- 제7항에 있어서,상기 축결합부의 상단 또는 하단에는 내측으로 돌출형성되어 상기 메탈베어링의 이탈을 방지하는 적어도 1 이상의 스토퍼가 형성되는 것을 특징으로 하는 진동모터.
- 제9항에 있어서,상기 메탈베어링의 상단 또는 하단에는 상기 스토퍼가 밀착되는 턱이 형성되는 것을 특징으로 하는 진동모터.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980111938.8A CN101981788B (zh) | 2008-03-28 | 2009-03-27 | 直流无刷振动电机 |
JP2011501725A JP2011516021A (ja) | 2008-03-28 | 2009-03-27 | ブラシレス振動モータ |
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2008-0029061 | 2008-03-28 | ||
KR1020080029061A KR100979954B1 (ko) | 2008-03-28 | 2008-03-28 | 무브러시 진동모터의 브라켓 및 그 제조방법 |
KR1020080050527A KR100992100B1 (ko) | 2008-05-30 | 2008-05-30 | 진동모터의 로터 |
KR10-2008-0050527 | 2008-05-30 | ||
KR10-2008-0050528 | 2008-05-30 | ||
KR10-2008-0051155 | 2008-05-30 | ||
KR1020080050528A KR100992099B1 (ko) | 2008-05-30 | 2008-05-30 | 진동모터의 로터 |
KR1020080051155A KR101011444B1 (ko) | 2008-05-30 | 2008-05-30 | 진동모터의 브라켓 |
KR1020080080327A KR100979720B1 (ko) | 2008-08-18 | 2008-08-18 | 진동모터의 스테이터 |
KR10-2008-0080327 | 2008-08-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009120046A2 true WO2009120046A2 (ko) | 2009-10-01 |
WO2009120046A3 WO2009120046A3 (ko) | 2010-01-14 |
Family
ID=41114477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2009/001585 WO2009120046A2 (ko) | 2008-03-28 | 2009-03-27 | 무브러시 진동모터 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2011516021A (ko) |
CN (1) | CN101981788B (ko) |
WO (1) | WO2009120046A2 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11843294B2 (en) * | 2018-04-13 | 2023-12-12 | Koninklijke Philips N.V. | Motor for a personal care device |
CN109038939B (zh) * | 2018-07-13 | 2021-04-20 | 浙江省东阳市东磁诚基电子有限公司 | 一种永磁交流扁平振动马达及使用方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040060154A (ko) * | 2002-12-30 | 2004-07-06 | 삼성전기주식회사 | 브러시리스 진동모터 |
KR20060022932A (ko) * | 2004-09-08 | 2006-03-13 | 자화전자 주식회사 | 편평형 브러시리스 진동모터 |
KR20070046307A (ko) * | 2005-10-31 | 2007-05-03 | 주식회사 모아텍 | 브러시리스 타입 편평형 진동모터 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0969422A (ja) * | 1995-08-31 | 1997-03-11 | Fujitsu Shintaa Kk | 金属磁性材及びその製造方法 |
CN1592047A (zh) * | 2003-09-05 | 2005-03-09 | 英福特伦株式会社 | 扁平型无芯振动电机 |
-
2009
- 2009-03-27 JP JP2011501725A patent/JP2011516021A/ja active Pending
- 2009-03-27 CN CN200980111938.8A patent/CN101981788B/zh not_active Expired - Fee Related
- 2009-03-27 WO PCT/KR2009/001585 patent/WO2009120046A2/ko active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040060154A (ko) * | 2002-12-30 | 2004-07-06 | 삼성전기주식회사 | 브러시리스 진동모터 |
KR20060022932A (ko) * | 2004-09-08 | 2006-03-13 | 자화전자 주식회사 | 편평형 브러시리스 진동모터 |
KR20070046307A (ko) * | 2005-10-31 | 2007-05-03 | 주식회사 모아텍 | 브러시리스 타입 편평형 진동모터 |
Also Published As
Publication number | Publication date |
---|---|
WO2009120046A3 (ko) | 2010-01-14 |
CN101981788B (zh) | 2013-03-27 |
JP2011516021A (ja) | 2011-05-19 |
CN101981788A (zh) | 2011-02-23 |
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