WO2006070610A1 - インナーロータ型振動モータ - Google Patents
インナーロータ型振動モータ Download PDFInfo
- Publication number
- WO2006070610A1 WO2006070610A1 PCT/JP2005/023048 JP2005023048W WO2006070610A1 WO 2006070610 A1 WO2006070610 A1 WO 2006070610A1 JP 2005023048 W JP2005023048 W JP 2005023048W WO 2006070610 A1 WO2006070610 A1 WO 2006070610A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- rotor
- vibration motor
- weight
- inner rotor
- Prior art date
Links
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
- H02K7/075—Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics
-
- 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 small-diameter cylindrical vibration motor, and more particularly to an inner rotor type DC brushless motor for generating vibration in which an eccentric weight is attached to a rotor magnet.
- vibration a small motor for generating vibration (hereinafter referred to as vibration) that informs the user of incoming notification by vibration.
- the vibration motor is used as necessary.
- an eccentric weight that becomes an eccentric center of gravity is attached to one end of an output rotating shaft to be driven, and the position of the center of gravity such as the weight swings with the rotation of the rotor. It uses the same centrifugal force to vibrate the entire mobile phone. As the mobile phones become more widespread, their mounting rate and frequency of use increase daily.
- vibration motors have the eccentric weight placed on one end of the output rotation shaft outside the motor housing case, but some of them are placed on a part of the rotor inside the housing case.
- the permanent magnet rotor itself has an unbalanced weight structure that uses an inertial body, and the rotating motor has an unbalanced moment of the permanent magnet rotor.
- a vibration motor can be provided with the simple eccentric gravity center structure of a permanent magnet rotor without attaching an extra inertia body on the shaft extension that is the end of the rotating shaft of the rotor.”
- Patent Document 1 Japanese Patent Laid-Open No. 5-304743
- Patent Document 2 JP-A-5-304744
- the vibration motors described in Patent Documents 1 and 2 are constituted by an unbalanced weight structure having a magnet (indicated as a permanent magnet in the patent document) and the rotor itself as an inertial body, and the rotor magnet is unbalanced.
- a magnet indicated as a permanent magnet in the patent document
- the rotor magnet is unbalanced.
- the vibration action can be obtained to some extent by the moment, the smaller the diameter of the motor body, the smaller the diameter of the magnet, and considering the magnetic imbalance of the magnet itself, the rotor magnet structure
- the magnetic starting force cannot be obtained, and the effect of the rotor itself as a weight inertial body is reduced even when viewed from the specific gravity of the magnet material.
- the rotor magnet placed inside the cylindrical housing case itself has a structure that is not magnetically unbalanced and does not have a high specific gravity, and the current outer size of the motor is reduced to about ⁇ 4 mm.
- the rotor magnet itself cannot obtain a sufficient starting force for driving the motor, and there is a fear that it hardly starts.
- the present invention has been made to solve the above-described problems, and always maintains the magnetic balance of the rotor magnet and rotates while effectively using the magnetic flux between the field coils.
- the object of the present invention is to provide a vibration motor having a rotor structure and an eccentric weight which becomes a heavy inertial body having a high specific gravity at an eccentric position of the rotor effective for obtaining a vibration force. It is another object of the present invention to provide a vibration motor that can be further reduced in diameter and size without reducing the rotational efficiency of the small motor.
- Magnetic field coils for generating an electric magnetic field are arranged on the inner wall of the housing case of the cylindrical motor, and the stator side bearings arranged at both ends of the cylindrical housing case are magnets.
- an inner rotor type cylindrical motor that supports and supports a rotor part composed of a shaft and a rotating shaft,
- the rotor-shaped magnet supported by the rotating shaft has a substantially rectangular cross-sectional plate magnet in which the ineffective magnetic flux range portion located in a direction orthogonal to the magnetic pole direction of the radially anisotropic magnet is evenly cut at both ends. And the rotor is balanced with respect to the rotation center axis.
- a weight inertial body which is a non-magnetic material force filling one side of the evenly cut space of the magnet, is separately provided as an eccentric weight and eccentric to the rotor part. It is a featured inner rotor type vibration motor.
- the vibration motor is driven by a two-phase or three-phase DC brushless drive system.
- the combined force of the magnet constituting the rotor portion and the heavy inertial body is an Nd magnet or Sm magnet, respectively.
- the inner rotor type vibration motor is characterized by an eccentric weight made of a rare earth magnet made of a non-magnetic material and a tungsten alloy with a specific gravity of 12 or more.
- a rotating shaft is arranged at the center of gravity of the rotor magnet, and an eccentric weight, which is a heavy inertia body, is fixedly attached to the magnet side by being directly bonded to the outer peripheral surface of the magnet or covered with a resin mold.
- This is an inner rotor type vibration motor characterized by The invention's effect
- the dynamic rotor balance of the rotating rotor magnet is maintained while starting up. Do not impair the effective magnetic flux to obtain the required torque.
- the basic operational characteristics of the drive output as a small motor can be sufficiently obtained.
- a weight inertial body made of a non-magnetic material having a specific gravity higher than that of the magnet material can be arranged as a weight that makes the center of gravity eccentric in a portion that has been cut off and lightened separately.
- the center of gravity radius from the center of the rotation axis of the entire rotor portion is increased, and more efficient vibration force can be obtained during operation.
- a rotor portion having an eccentric center of gravity with excellent space efficiency can be configured.
- the drive system of the vibration motor is based on the two-phase or three-phase DC brushless drive system.
- brushless there is no physical electric rectification mechanism consisting of brushes and commutators, and a long-life motor structure is possible.
- the electrical rectification mechanism is electrically processed by a driving circuit called a driver.
- the design of the driving circuit is easy, but the power of the position at which the rotor is stopped can be fixed. Mechanical means are required.
- the design phase of the drive circuit for starting the rotor section is larger in the three-phase than in the two-phase, and in the case of the three-phase, the sensor driving force using the Hall element etc. It affects the number of parts and development costs in terms of circuit design.
- the power to incorporate a part of the dedicated drive circuit on the drive circuit board side of the basic base, or whether it is mounted on the vibration motor as an external drive circuit depends largely on the development design.
- the combined force of the magnet that constitutes the rotor part and the heavy inertial body Each is a rare earth magnet made of Nd magnet or Sm magnet, and an eccentric weight made of tandastene alloy with a specific gravity of 12 or more.
- the rotation required by a small and small rotor magnet is required.
- the rotating magnetic flux can be used effectively while making the magnet a small diameter.
- a specific gravity in the range of 13 to 16 within the range that can be produced with a sintered alloy can be used sufficiently.
- materials with a specific gravity of 12 or more and less than 13 that can be mixed and molded with other resin components can be used as a weight inertia body to some extent, but materials with a specific gravity of less than 12 are small products. Considering this, sufficient vibration force cannot be obtained.
- a rotating shaft is arranged at the center of gravity of the rotor magnet itself, and an eccentric weight, which is a heavy inertial body, is directly bonded to the outer peripheral surface of the magnet or entirely covered with a resin mold to be integrated. It is possible to assemble the entire rotor section that applies mechanical stress to the rotating shaft. Also, as the rotor part, the magnet and the eccentric weight can be attached to and integrated with the shaft that is the rotating shaft, and the productivity and cost can be reduced by the resin molding method using injection molding technology. .
- the rare earth magnet can be integrally formed with a resin magnet in addition to a sintered magnet, and the degree of freedom in designing the combined shape is expanded in combination with the shape of the eccentric weight.
- FIGS. 1 to 3 the configuration of an embodiment according to the present invention will be described with reference to FIGS. 1 to 3.
- a brushless drive cylindrical vibration motor in which an eccentric weight is attached to a rotor magnet will be described as an example.
- FIG. 1 is a schematic cross-sectional view showing an example of the best embodiment of the present invention.
- the shape of the magnet 2 of the inner rotor part is an ineffective magnetic flux located in a direction perpendicular to the magnetic pole direction of the anisotropic magnet material oriented in the radial direction with N'S magnetic field.
- Range part It is a plate-shaped magnet with a substantially rectangular cross section cut at both ends equally.
- the rare earth magnets preferred by Nd-Fe-B or Sm-Co rare earth magnets are excellent in magnetic properties and can be reduced in size due to a smaller diameter.
- the magnet 2 itself has a symmetrical cross-sectional shape with respect to the rotation center axis 6, and the rotor balance is dynamically maintained.
- a circular portion of the base of the magnet 2 that has been made into a substantially rectangular shape is cut out separately, and one portion lightened (that is, one region cut out of an arc)
- a rod-shaped eccentric weight 3 is attached integrally with the magnet 2 as a weight inertial body having a non-magnetic material force having a higher specific gravity than the magnet material, and a weight that causes the rotor portion to have an eccentric center of gravity.
- an eccentric weight 3 made of a material with a high specific gravity to a part of one side of the magnet 2 that is effective for eccentric gravity while maintaining the magnetic characteristics of the magnet 2 in a small motor.
- the center-of-gravity radius can be increased, and an eccentric rotor section with excellent space can be configured as an inner rotor type vibration motor.
- the rotor portion On the outer periphery of the rotor portion, it is accurately arranged via a field coil 4 force magnetic gap fixedly arranged on the inner wall of the housing case 5.
- the rotor portion includes a bearing 8 on the side of the small diameter portion where the rotating shaft 6 is narrowed down in the housing case 5, and a bearing on the end flange 7 on the other end of the housing case 5. 8 and are supported by both shafts.
- the support in the thrust direction of the port portion is regulated and held by the thrust receiver 9 on the end flange 7 side and the liner 10 on the other side.
- a terminal 11 for connecting and relaying the tap wire of the field coil 4 is attached to one end of the cylindrical field coil 4 in the power feeding section of the field coil 4, and a power feeding terminal using a flexible substrate is provided. 12 is pulled out of the end flange 7.
- the power supply terminal 12 is connected to a drive circuit (not shown) on the device body side.
- the drive system in this embodiment is a brushless motor of a three-phase sensorless drive system.
- a brushless design eliminates the need for a physical commutation mechanism consisting of brushes and rectifiers, and enables a long-life motor structure.
- the brushless design substantially supports the wear of the sliding part of the bearing, which means that the rotor part is supported at both ends.
- the service life of the parts of the bearing part is longer than that of the brush commutator as the electric sliding contact part, and as a result, the reliability of the motor is improved.
- the physical rectification mechanism is electrically processed instead by a drive circuit called a driver. ,
- the output shaft is externally attached to the outside of the housing case 5 like the conventional vibration motor 100 shown in FIG. It is also different in appearance from the vibration motor structure of the type to which the semi-cylindrical eccentric weight 103 formed from a high specific gravity sintered alloy such as tungsten is attached.
- the effective magnetic flux range (R) for the opposing field coil 24 is one. Generally, it is about 100 to 130 degrees on one side, and about 50 to 80 degrees on the other side is the ineffective magnetic flux range part (W).
- the ineffective magnetic flux range part (W) of this magnet 22 This is a part that has little to do with the effect.
- the shape of the magnet 2 is processed into a plate-shaped magnet having a substantially rectangular cross section, and the balance of the rotation during rotation with respect to the rotation shaft 6 which is the rotation center axis. It was attached to keep it.
- FIG. 2 shows an example of another embodiment of the present invention.
- the shape of the magnet 2 of the inner rotor section in FIG. 2 (a) shown in the schematic cross-sectional view is the same as that shown in FIG. 1 in the magnetic pole direction of the anisotropic magnet material oriented in the N'S magnetic field in the same radial direction. In contrast, ineffective in the orthogonal direction It is a plate-like magnet having a substantially rectangular cross section in which the magnetic flux range portion (w) is cut out evenly at both ends.
- the material composition is also a Nd—Fe—B or Sm—Co rare earth magnet, which is suitable for downsizing.
- the magnet 2 itself has a symmetrical cross-sectional shape with respect to the rotation center axis 6 as described above, and the rotor balance is maintained dynamically.
- the unbalance means of the rotor section is the same as that shown in FIG.
- the only difference from FIG. 1 is that the magnet 2 and the eccentric weight 3 are integrally joined to the rotating shaft 6 by the resin mold 20.
- This is a structure that reduces the number of processes in the assembly manufacturing process and improves mass productivity.
- simply setting each part in the molding die simplifies the series of operations from positioning the dimensions to fixing the bonding mold, and at the same time reduces costs in the rotor assembly process. This also leads to an increase in impact resistance of the entire rotor.
- the rotating shaft is arranged at the center of gravity of the rotor magnet 2 itself, and the eccentric weight 3 which is a weight inertial body is entirely covered with a resin mold and integrated with the outer peripheral surface of the magnet 2.
- the eccentric weight 3 which is a weight inertial body is entirely covered with a resin mold and integrated with the outer peripheral surface of the magnet 2.
- a vibration motor in which an eccentric weight, which is a heavy inertial body having a high specific gravity, is arranged at an eccentric position of the rotor effective for obtaining a vibration force. Further, as the motor, an inner rotor type vibration motor that can be further reduced in diameter and size without lowering the rotation efficiency can be provided.
- FIG. 1 is a schematic cross-sectional view taken along the line AA showing the internal structure of the inner rotor type vibration motor according to the present invention, and a schematic cross-sectional view taken along the line BB (b).
- FIG. 2 is an AA cross-sectional schematic diagram (a) and a BB cross-sectional schematic diagram (b) showing the internal structure of the inner rotor type vibration motor according to the present invention.
- FIG. 3 is an explanatory schematic diagram showing a magnet effective magnetic flux range (R) and an ineffective magnetic flux range (W) of the inner rotor portion according to the present invention.
- FIG. 4 is a cross-sectional reference diagram showing an example of a modified combination of the magnet and the eccentric weight shape of the inner rotor portion according to the present invention.
- FIG. 5 Cross-sectional reference diagram showing an example of the structure of a conventional vibration motor with an eccentric weight attached to the tip of the output shaft.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Brushless Motors (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006550672A JP4822214B2 (ja) | 2004-12-28 | 2005-12-15 | インナーロータ型振動モータ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004380448 | 2004-12-28 | ||
JP2004-380448 | 2004-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006070610A1 true WO2006070610A1 (ja) | 2006-07-06 |
Family
ID=36614730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/023048 WO2006070610A1 (ja) | 2004-12-28 | 2005-12-15 | インナーロータ型振動モータ |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP4822214B2 (ja) |
KR (1) | KR100884063B1 (ja) |
CN (1) | CN100583599C (ja) |
TW (1) | TW200635186A (ja) |
WO (1) | WO2006070610A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106655693A (zh) * | 2016-09-27 | 2017-05-10 | 上海泉源机电有限公司 | 一种磁平衡直线振动马达 |
CN109638992A (zh) * | 2017-10-05 | 2019-04-16 | 德国福维克控股公司 | 外转子电机 |
WO2020201194A1 (de) * | 2019-04-02 | 2020-10-08 | Wacker Neuson Produktion GmbH & Co. KG | Schwingungserregervorrichtung zum erzeugen von schwingungen und/oder vibrationen |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015102207A1 (de) * | 2015-02-16 | 2016-08-18 | Oase Gmbh | Pumpe mit Elektromotor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04108368U (ja) * | 1991-02-28 | 1992-09-18 | 並木精密宝石株式会社 | ペイジヤー用偏平振動モータ |
JPH0549211A (ja) * | 1991-08-09 | 1993-02-26 | Tokin Corp | 振動モータ |
JPH05304743A (ja) * | 1992-04-25 | 1993-11-16 | Sayama Seimitsu Kogyo Kk | 永久磁石ロータを慣性体とした振動モータ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05304744A (ja) * | 1992-04-25 | 1993-11-16 | Sayama Seimitsu Kogyo Kk | Dcブラシレス振動モータ及びその駆動回路 |
JP2002247794A (ja) * | 2001-02-15 | 2002-08-30 | Namiki Precision Jewel Co Ltd | 小型振動モータ |
-
2005
- 2005-12-13 TW TW094144059A patent/TW200635186A/zh not_active IP Right Cessation
- 2005-12-15 WO PCT/JP2005/023048 patent/WO2006070610A1/ja not_active Application Discontinuation
- 2005-12-15 JP JP2006550672A patent/JP4822214B2/ja not_active Expired - Fee Related
- 2005-12-15 KR KR1020077005550A patent/KR100884063B1/ko not_active IP Right Cessation
- 2005-12-15 CN CN200580038475A patent/CN100583599C/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04108368U (ja) * | 1991-02-28 | 1992-09-18 | 並木精密宝石株式会社 | ペイジヤー用偏平振動モータ |
JPH0549211A (ja) * | 1991-08-09 | 1993-02-26 | Tokin Corp | 振動モータ |
JPH05304743A (ja) * | 1992-04-25 | 1993-11-16 | Sayama Seimitsu Kogyo Kk | 永久磁石ロータを慣性体とした振動モータ |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106655693A (zh) * | 2016-09-27 | 2017-05-10 | 上海泉源机电有限公司 | 一种磁平衡直线振动马达 |
CN109638992A (zh) * | 2017-10-05 | 2019-04-16 | 德国福维克控股公司 | 外转子电机 |
CN109638992B (zh) * | 2017-10-05 | 2022-09-20 | 德国福维克控股公司 | 外转子电机 |
WO2020201194A1 (de) * | 2019-04-02 | 2020-10-08 | Wacker Neuson Produktion GmbH & Co. KG | Schwingungserregervorrichtung zum erzeugen von schwingungen und/oder vibrationen |
Also Published As
Publication number | Publication date |
---|---|
KR100884063B1 (ko) | 2009-02-19 |
TW200635186A (en) | 2006-10-01 |
JP4822214B2 (ja) | 2011-11-24 |
KR20070065320A (ko) | 2007-06-22 |
TWI327406B (ja) | 2010-07-11 |
JPWO2006070610A1 (ja) | 2008-06-12 |
CN100583599C (zh) | 2010-01-20 |
CN101057384A (zh) | 2007-10-17 |
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