WO2016017584A1 - リニア振動モータ - Google Patents
リニア振動モータ Download PDFInfo
- Publication number
- WO2016017584A1 WO2016017584A1 PCT/JP2015/071254 JP2015071254W WO2016017584A1 WO 2016017584 A1 WO2016017584 A1 WO 2016017584A1 JP 2015071254 W JP2015071254 W JP 2015071254W WO 2016017584 A1 WO2016017584 A1 WO 2016017584A1
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- shaft
- vibration motor
- linear vibration
- magnet
- fixed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
- B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
Definitions
- the present invention relates to a linear vibration motor that generates vibration by linearly reciprocating a mover by signal input.
- Vibration motors (or vibration actuators) generate vibrations by receiving incoming communications equipment or sending alarms from various electronic devices, etc. It is communicated and is equipped in various electronic devices such as portable information terminals including mobile phones.
- linear vibration motors that can generate relatively large vibrations by linear reciprocating vibration are known.
- This linear vibration motor is provided with a linear fixed shaft, and by adopting a configuration that vibrates the mover along this, it is possible to obtain stable vibration with little sound generation due to one piece of contact, etc. Since the mover can be held by this, damage resistance during a drop impact can be obtained.
- a drive unit is configured by a coil fixed to a casing and a magnet disposed in the coil, and a weight is connected to the magnet along the vibration direction to move the mover.
- the movable member is formed with a through hole along the vibration direction, and a single fixed shaft is passed through the through hole (see Patent Document 1 below), or two along the vibration direction.
- a fixed shaft is provided, and a drive unit composed of a coil and a magnet is arranged between the two fixed shafts, and a mover that is provided with a weight portion and is driven by the drive unit is slidably supported by the two fixed shafts.
- the thing (refer the following patent document 2) etc. are proposed.
- a coil spring is provided around the fixed shaft, and the mover is moved along the fixed shaft by the driving force directed in one direction by the driving unit and the elastic force of the coil spring repelling the driving force. To reciprocate.
- vibration motors equipped with them are required to be further reduced in size and thickness.
- the space in the device in the thickness direction perpendicular to the display surface is limited. There is.
- a through-hole along the vibration direction is formed in a mover having a weight portion coupled to a magnet along the vibration direction.
- a through hole is formed in the magnet itself, and in order to secure a sufficient volume of the magnet to obtain a desired driving force, the thickness of the magnet is sufficiently increased with respect to the diameter of the fixed shaft. It becomes necessary to do.
- the drive unit is configured by further arranging a coil around the magnet, there is a problem that it cannot sufficiently cope with the reduction in thickness.
- the present invention is an example of a problem to deal with such a problem.
- it is possible to reduce the thickness of a linear vibration motor equipped with a shaft, and further to reduce the volume of the magnet without increasing the number of magnet parts, and to ensure a stable vibration and to reduce the thickness. This is the purpose of the present invention.
- a linear vibration motor has the following configuration.
- a linear vibration motor comprising: an elastic member that imparts an elastic force repelling the driving force to the movable element.
- FIG. 1 is an exploded perspective view showing an overall configuration of a linear vibration motor according to an embodiment of the present invention.
- Explanatory drawing which showed the whole structure of the linear vibration motor based on embodiment of this invention ((a) is a top view in the state except a cover board, (b) is A1-A1 sectional drawing in (a), (c).
- (A) is a sectional view taken along line A2-A2 in FIG. BRIEF DESCRIPTION OF THE DRAWINGS
- It is explanatory drawing ((a) is BB sectional drawing in (b),
- (b) is a front view) which showed the whole structure of the linear vibration motor which concerns on embodiment of this invention. It is the disassembled perspective view which showed the whole linear vibration motor structure concerning other embodiment of this invention.
- 1 to 3 show the overall configuration of a linear vibration motor according to an embodiment of the present invention.
- the X direction in each figure indicates the vibration direction (uniaxial direction), the Y direction indicates the width direction, and the Z direction indicates the thickness (height) direction.
- the linear vibration motor 1 according to the embodiment of the present invention has a problem of thinning in the Z direction.
- the linear vibration motor 1 includes a frame 2, a fixed shaft 3 fixed to the frame 2 and extending in a uniaxial direction (X direction in the drawing), and a uniaxial direction (X direction in the drawing) by the fixed shaft 3.
- a movable element 20 that is slidably supported, a drive unit 10 that drives the movable element 20 in a uniaxial direction (X direction in the drawing), and an elastic member 8 are provided.
- the frame 2 only needs to have a frame configuration that can fix the single fixed shaft 3 and can accommodate the above-described parts.
- the periphery of the rectangular bottom surface 2A is provided.
- Side walls 2B, 2C, 2D, 2E are provided, and shaft fixing portions 2B1, 2C1 for fixing both ends of the fixed shaft 3 are provided on the side walls 2B, 2C facing each other.
- the frame body 2 is provided with a cover plate 2Q that covers the contents in the frame body 2 as required.
- the lid plate 2Q is formed in a rectangular plate shape attached to the upper end surfaces of the side walls 2B to 2E.
- the frame 2 can be formed by processing (pressing or the like) a metal plate.
- the fixed shaft 3 is a linear cylinder or prism member having rigidity necessary to stably vibrate the mover 20.
- the fixed shaft 3 is used as a single unit in order to eliminate the need for axis adjustment.
- the driving unit 10 includes a magnet 4 constituting a part of the mover 20 and a coil 6 fixed to the frame 2.
- the magnet 4 is arranged in parallel with the fixed shaft 3 in the frame 2, and the fixed shaft 3 extends along a uniaxial direction (X direction in the drawing) without penetrating the magnet 4.
- the magnet 4 is formed by arranging two flat rectangular magnet pieces 4A and 4B having a polarity along a uniaxial direction (X direction in the drawing) so that the same poles face each other and sandwiching the spacer yoke 4C therebetween. Is. A reinforcing plate 5 is fixed to the side surface of the magnet 4 as necessary, thereby increasing the rigidity of the magnet 4.
- the coil 6 is obtained by winding a wire around the magnet 4 with the direction of the magnetic pole in the X direction along the Y and Z directions, and one or both of the upper surface and the lower surface, and further, if necessary, the side surface. It is fixed to the inner surface of the frame 2.
- the coil 6 may be fixed to the frame 2 directly, or the coil 6 may be wound around a coil bobbin and the coil bobbin may be fixed to the frame 2.
- the magnet 4 is driven along the X direction by passing a current through the coil 6.
- the magnet 4 and the fixed shaft 3 are arranged inside the coil 6. However, if there is a space in the Y direction shown in the figure, the fixed shaft 3 may be arranged outside the coil 6. Good.
- the mover 20 includes a magnet 4 and a weight portion 7 connected to the magnet 4.
- the weight portion 7 is connected to both sides of the uniaxial direction (X direction in the drawing) of the magnet 4.
- the movable shaft 20 is slidably supported in one axial direction (X direction in the drawing) by allowing the fixed shaft 3 to pass through the guide hole 7A formed in the weight portion 7.
- the weight portion 7 can be made of a metal material having a high specific gravity and has a substantially rectangular parallelepiped shape having a height in the Z direction larger than the thickness of the magnet 4 in the illustrated example.
- a bearing may be connected to the mover 20 and the bearing may be slidably supported by the fixed shaft 3.
- the guide hole is directly formed in the weight portion 7.
- the space efficiency in the Y direction can be increased, and the width of the linear vibration motor 1 can be made compact.
- the guide hole 7A is provided directly in the weight portion 7, the bearing and the connecting member for connecting the guide hole 7A to the mover 20 can be omitted, so that the number of parts can be reduced.
- the elastic member 8 is arranged non-coaxially with the fixed shaft 3 in the frame 2 and applies an elastic force repelling the driving force of the driving unit 10 to the movable element 20.
- a coil spring that expands and contracts along the uniaxial direction (X direction) is used as the elastic member 8, and the elastic member 8 is disposed coaxially on both sides in the vibration direction of the mover 20.
- two elastic members 8 are interposed between the weight portion 7 and the side walls 2B and 2C, respectively.
- the central axis of the elastic member 8 is arranged in parallel with the central axis of the fixed shaft 3.
- One end of the elastic member 8 is locked to the support protrusion 2P provided on the side walls 2B and 2C, and the other end of the elastic member 8 is inserted into the attachment recess 7C provided on the weight portion 7 to enter the attachment recess 7C.
- the support protrusion 7C1 is engaged.
- the operation of such a linear vibration motor 1 will be described.
- the mover 20 When not driven, the mover 20 is stationary at the vibration center position where the elastic forces of the two elastic members 8 are balanced.
- a vibration generation signal current is input to the coil 6, a driving force in the X direction is applied to the magnet 4, and the mover 20 moves along the fixed shaft 3 by this driving force and the elastic repulsive force of the elastic member 8. Vibrates back and forth.
- the vibration generation signal is preferably an alternating current having a resonance frequency determined by the mass of the mover 20 and the elastic coefficient of the elastic member 8.
- the linear vibration motor 1 since the linear vibration motor 1 according to the embodiment of the present invention has the magnet 4 arranged in parallel on one side of the fixed shaft 3, a magnet volume for obtaining a sufficient driving force without dividing the magnet 4 is ensured. can do. As a result, the linear vibration motor 1 that slides and supports the movable element 20 on the fixed shaft 3 can be obtained with a structure that suppresses the volume reduction of the magnet 4 without increasing the number of parts of the magnet 4.
- the elastic member 8 is arranged non-coaxially with respect to the fixed shaft 3, the diameter of the elastic member 8 can be reduced regardless of the diameter of the fixed shaft 3.
- the setting of the elastic force when the diameter of the elastic member 8 is reduced can be appropriately set by selecting the material of the elastic member 8 or arranging a large number of elastic members 8 in parallel. This also makes it possible to reduce the thickness of the linear vibration motor 1 provided with the fixed shaft 3.
- the fixed shaft 3 is arranged on one side of the left and right of the movable element central axis O along the one axial direction (the X direction shown in the figure) of the movable element 20. ing.
- the fixed shaft 3 close to one side of the mover 20
- the Y-direction space for arranging the magnet 4 can be widened.
- the magnet 4 can increase the width in the Y direction even when the thickness in the Z direction is reduced, and can secure a volume for obtaining a desired driving force.
- the mover 20 is rotated around the fixed shaft 3 arranged so as to be shifted to one of the left and right sides, and the other side of the mover 20 is swung up and down.
- a slide receiving portion 21 is provided on the inner surface of the frame 2 on the other side of the left and right sides so that the mover 20 is in sliding contact, and the surface of the weight portion 7 of the mover 20 is in contact with the slide receiving portion 21.
- a sliding projection 7B is provided. According to this, by forming the sliding receiving portion 21 with a resin material or the like, even when the left and right other sides of the mover 20 are in contact with the inner surface of the frame 2, it is possible to suppress the generation of abnormal noise and the like. Vibration can be maintained.
- the mover 20 When the position of the magnet 4 connected to the weight portion 7 of the mover 20 is shifted either up or down, the mover 20 is moved up or down one side of the frame 2 by the magnetic attractive force acting between the magnet 4 and the frame 2. Therefore, when such a coupling position of the magnet 4 is employed, the above-described sliding receiving portion 21 and the sliding projection 7B may be provided only on one of the upper and lower sides.
- the linear vibration motor 1 shown in FIGS. 4 and 5 includes a moving shaft 30 fixed to the movable element 20 side in the frame 2 in place of the fixed shaft 3 described above.
- the moving shaft 30 is fixed to the movable element 20 and moves along the uniaxial direction together with the movable element 20.
- the frame 2 is provided with a bearing 31 that supports the movable shaft 30 in a slidable manner.
- the bearing 31 is attached to the bearing support member 32 and is fixed to the bottom surface 2 ⁇ / b> A of the frame body 2.
- the moving shaft 30 is fixed to the weight portion 7 of the mover 20.
- the moving shaft 30 is a single shaft, and both ends thereof are pivotally supported by the bearing 31.
- the magnet 4 serving as the driving unit 10 is arranged in parallel with the moving shaft 30 in the frame 2.
- the magnet 4 is composed of three magnet pieces 4X, 4Y and 4Z, which are connected via a spacer yoke 4C.
- the magnet pieces 4X, 4Y, 4Z are magnetized along the axial direction of the moving shaft 30, and adjacent magnet pieces 4X, 4Y (4Y, 4Z) are magnetized in opposite directions.
- two coils 6 serving as the drive unit 10 are wound in series and in reverse around the two spacer yokes 4C.
- the elastic member 8 arranged non-coaxially with the moving shaft 30 has four central axes arranged in parallel with the central axis of the moving shaft 30, two on one side.
- One end (fixed end) of each of the plurality of elastic members 8 is supported by a support protrusion 2P provided on the side walls 2B and 2C of the frame body 2, and the other end (moving end) is provided on an end portion of the weight portion 7. 7D is supported.
- the example shown in FIG. 6 is a modification of the example shown in FIGS. 4 and 5, and the linear vibration motor 1 is divided into two shafts 30 ⁇ / b> A and 30 ⁇ / b> B in which the moving shaft 30 is arranged along one axis direction.
- the central axes of the shafts 30A and 30B coincide.
- the movable shaft 30 is divided so that one shaft 30A is fixed to one weight portion 7 and the other shaft 30B is fixed to the other weight portion 7, thereby being arranged between the pair of weight portions 7.
- the magnet 4 can be provided wide in the Y direction intersecting the moving shaft 30, thereby increasing the driving force.
- the example shown in FIG. 7 is an example in which the example shown in FIG. 6 is further modified, and the linear vibration motor 1 includes a fixed shaft in which shafts 3A and 3B divided along a uniaxial direction are fixed to the frame 2. It is three. That is, the central axes of the shafts 3A and 3B coincide. One end of each of the shafts 3A and 3B is supported by the side walls 2B and 2C of the frame body 2, the other end is a free end, and the free end is slidable in a guide hole 7A formed in the weight portion 7. It is inserted.
- the fixed end portions of the shafts 3A and 3B are stably supported by support portions 2B1 and 2C1 that are separated from the side walls 2B and 2C of the frame 2 in the axial direction.
- the linear vibration motor 1 vibrates the mover 20 along the shaft (the fixed shaft 3 or the moving shaft 30) that extends in the uniaxial direction on the frame 2.
- stable vibration can be obtained and damage resistance during a drop impact can be obtained.
- the elastic member 8 is arranged non-coaxially with the shaft (the fixed shaft 3 or the moving shaft 30) in the frame 2, the diameter of the elastic member 8 formed by the coil spring is set to be larger than the shaft diameter. Therefore, it is possible to reduce the thickness. Thereby, in the linear vibration motor 1 including the shaft (the fixed shaft 3 or the moving shaft 30), it is possible to reduce the thickness of the magnet 4 without increasing the number of parts of the magnet 4 and suppressing the volume reduction of the magnet 4.
- FIG. 8 shows a portable information terminal 100 as an example of an electronic apparatus equipped with the linear vibration motor 1 according to the embodiment of the present invention.
- the portable information terminal 100 including the linear vibration motor 1 that can obtain a stable vibration and can be thinned is a user with stable vibration that is unlikely to generate abnormal noise at the start and end of operations such as incoming calls and alarm functions in communication functions. Can tell.
- the portable information terminal 100 pursuing high portability or design can be obtained by thinning the linear vibration motor 1.
- the linear vibration motor 1 has a compact shape in which each part is housed in a rectangular parallelepiped frame 2 with a reduced thickness, the linear vibration motor 1 can be efficiently installed inside the thinned portable information terminal 100. .
Abstract
Description
枠体と、該枠体に一軸方向に沿って延設されるシャフトと、マグネットと前記枠体に固定されるコイルを備え、前記マグネットを前記一軸方向に沿って駆動する駆動部と、前記マグネットと当該マグネットに連結される錘部とを備え、前記シャフトによって前記一軸方向に沿って摺動自在に支持される可動子と、前記枠体内で前記シャフトとは非同軸に配置され、前記駆動部の駆動力に反発する弾性力を前記可動子に付与する弾性部材とを備えることを特徴とするリニア振動モータ。
2:枠体,2A:底面,2B,2C,2D,2E:側壁,
2B1,2C1:シャフト固定部,2P:支持突起,
2Q:蓋板,21:摺動受け部,
3:固定シャフト,10:駆動部,
4:マグネット,4A,4B,4X,4Y,4Z:マグネット片,
4C:スペーサヨーク,
5:補強板,6:コイル,20:可動子,
7:錘部,7A:ガイド孔,7B:摺動突起,7C:取り付け凹部,
7C1,7D:支持突起,8:弾性部材,
30:移動シャフト,31:軸受,32:軸受支持部材,
3A,3B,30A,30B:シャフト,
100:携帯情報端末
Claims (12)
- 枠体と、
該枠体内で一軸方向に沿って延設されるシャフトと、
マグネットと前記枠体に固定されるコイルを備え、前記マグネットを前記一軸方向に沿って駆動する駆動部と、
前記マグネットと当該マグネットに連結される錘部とを備え、前記シャフトによって前記一軸方向に沿って摺動自在に支持される可動子と、
前記枠体内で前記シャフトとは非同軸に配置され、前記駆動部の駆動力に反発する弾性力を前記可動子に付与する弾性部材とを備えることを特徴とするリニア振動モータ。 - 前記シャフトの中心軸と前記弾性部材の中心軸が平行に配置されていることを特徴とする請求項1記載のリニア振動モータ。
- 前記弾性部材は、前記可動子の振動方向両側にて同軸上に配置されることを特徴とする請求項1又は2記載のリニア振動モータ。
- 前記シャフトは、前記可動子の前記一軸方向に沿った可動子中心軸に対して左右一方にシフトした位置に配置されていることを特徴とする請求項1~3のいずれか1項に記載のリニア振動モータ。
- 前記可動子中心軸に対して左右他方側における前記枠体の内面に前記可動子が摺動接触する摺動受け部を設けたことを特徴とする請求項4記載のリニア振動モータ。
- 前記可動子における前記錘部の表面に、前記摺動受け部に接触する摺動突起を設けたことを特徴とする請求項5記載のリニア振動モータ。
- 前記シャフトは、前記枠体に固定され一軸方向に沿って延設される固定シャフトであり、
前記マグネットは、前記固定シャフトに並列して配置されることを特徴とする請求項1~6のいずれか1項記載のリニア振動モータ。 - 前記固定シャフトは、前記錘部に形成されたガイド孔を貫通することで前記可動子を摺動自在に支持することを特徴とする請求項7記載のリニア振動モータ。
- 前記枠体は、矩形状の底面の周辺に側壁を備え、互いに対面する前記側壁に前記固定シャフトの両端がそれぞれ固定されていることを特徴とする請求項7又は8に記載のリニア振動モータ。
- 前記シャフトは、前記可動子に固定されて前記可動子と共に前記一軸方向に沿って移動する移動シャフトであり、
前記枠体には、前記移動シャフトを摺動自在に支持する軸受が設けられることを特徴とする請求項1~6のいずれか1項記載のリニア振動モータ。 - 前記移動シャフトは、前記可動子の前記錘部に固定され、
前記マグネットは、前記移動シャフトに並列して配置されることを特徴とする請求項10記載のリニア振動モータ。 - 請求項1~11のいずれか1項に記載のリニア振動モータを備える携帯情報端末。
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JP2016538340A JPWO2016017584A1 (ja) | 2014-07-28 | 2015-07-27 | リニア振動モータ |
US15/500,280 US10270326B2 (en) | 2014-07-28 | 2015-07-27 | Linear vibration motor |
CN201580040312.8A CN106537742B (zh) | 2014-07-28 | 2015-07-27 | 线性振动马达 |
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- 2015-07-27 JP JP2016538340A patent/JPWO2016017584A1/ja active Pending
- 2015-07-27 WO PCT/JP2015/071254 patent/WO2016017584A1/ja active Application Filing
- 2015-07-27 CN CN201580040312.8A patent/CN106537742B/zh not_active Expired - Fee Related
- 2015-07-27 US US15/500,280 patent/US10270326B2/en not_active Expired - Fee Related
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WO2017164397A1 (ja) * | 2016-03-25 | 2017-09-28 | 日本電産コパル株式会社 | リニア振動モータ |
JP2017175879A (ja) * | 2016-03-25 | 2017-09-28 | 日本電産コパル株式会社 | リニア振動モータ |
JP2019518592A (ja) * | 2016-05-11 | 2019-07-04 | ロフェルト・ゲーエムベーハー | 振動アクチュエータ |
US11192141B2 (en) | 2016-05-11 | 2021-12-07 | Lofelt Gmbh | Vibrating actuator |
JP2018001108A (ja) * | 2016-07-05 | 2018-01-11 | 日本電産コパル株式会社 | リニア振動モータ |
WO2018008280A1 (ja) * | 2016-07-05 | 2018-01-11 | 日本電産コパル株式会社 | リニア振動モータ |
US20190165662A1 (en) * | 2016-07-05 | 2019-05-30 | Nidec Copal Corporation | Linear vibration motor |
US20230086204A1 (en) * | 2021-09-22 | 2023-03-23 | Apple Inc. | Haptic Engine Based on an Angular Resonant Actuator |
US11936269B2 (en) * | 2021-09-22 | 2024-03-19 | Apple Inc. | Haptic engine based on angular resonant actuator with pivot axis and mass center that differ |
Also Published As
Publication number | Publication date |
---|---|
JPWO2016017584A1 (ja) | 2017-04-27 |
CN106537742A (zh) | 2017-03-22 |
US10270326B2 (en) | 2019-04-23 |
CN106537742B (zh) | 2019-03-05 |
US20170214307A1 (en) | 2017-07-27 |
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