WO2010075660A1 - 电动牙刷驱动程序 - Google Patents

电动牙刷驱动程序 Download PDF

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Publication number
WO2010075660A1
WO2010075660A1 PCT/CN2009/000896 CN2009000896W WO2010075660A1 WO 2010075660 A1 WO2010075660 A1 WO 2010075660A1 CN 2009000896 W CN2009000896 W CN 2009000896W WO 2010075660 A1 WO2010075660 A1 WO 2010075660A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating shaft
shoe
fixing
coil
magnet
Prior art date
Application number
PCT/CN2009/000896
Other languages
English (en)
French (fr)
Inventor
黄拔梓
Original Assignee
Huang Bazi
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 Huang Bazi filed Critical Huang Bazi
Publication of WO2010075660A1 publication Critical patent/WO2010075660A1/zh

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K33/00Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16Motors 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278Surface mounted magnets; Inset magnets
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16Power-driven cleaning or polishing devices
    • A61C17/22Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3472Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body with combined movements of the brush body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16Power-driven cleaning or polishing devices
    • A61C17/22Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3418Rotation around the axis of the toothbrush handle
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16Power-driven cleaning or polishing devices
    • A61C17/22Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3445Translation along the axis of the toothbrush handle
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • H02K1/146Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1672Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor

Definitions

  • the present invention relates to personal cleaning articles, and more particularly to an electric toothbrush driving device.
  • the rotational motion of the drive shaft of the motor is converted into a reciprocating linear motion or a reciprocating rotational motion by the motion conversion mechanism, and the drive shaft mounted on the motion conversion mechanism is a toothbrush head reciprocating in the axial direction of the drive shaft or Rotating reciprocally around the central axis of the drive shaft.
  • the conversion mechanism is often a gear mechanism or a cam mechanism to convert the continuous rotational motion of the drive shaft of the motor into a reciprocating linear motion of the drive shaft of the motion conversion mechanism or reciprocating around the central axis of the drive shaft.
  • Rotating motion due to the existence of the conversion mechanism, it is difficult to move the brush head at high speed, thereby limiting the effect of removing plaque.
  • the electric toothbrush comprises a toothbrush head and an actuator for moving the toothbrush head, the actuator is a driving device of the electric toothbrush, a drive shaft, a first magnetic circuit for reciprocating the drive shaft up and down, and a second magnetic circuit for reciprocally rotating the drive shaft; and the second magnetic circuit is mainly generated by an inverter in the circuit
  • the periodically varying voltage drives the coil to produce a periodically varying current.
  • the turns are solenoid structures in which the current in the coil produces a varying magnetic field that is magnetized through the solenoid-shaped shoe yoke.
  • An object of the present invention is to overcome the deficiencies of the prior art and to provide an electric toothbrush driving device which is low in loss, high in efficiency, and simple in structure.
  • An electric toothbrush driving device comprises a driving circuit and an outer casing for sealing dustproof and supporting functions, and further comprising a driving rotating shaft, wherein the two ends of the rotating shaft are respectively provided with a bearing, and the bearing is fixed Mounted in the inner cavity of the outer casing; a coil holder is sleeved in the inner cavity of the outer casing, and four inner surfaces of the coil holder are uniformly protruded inwardly, and each of the shoe-shaped yokes has a winding a driving coil, a driving coil and the driving circuit electrode are connected, an end of each of the shoe-shaped yokes is further connected with an arc-shaped pole yoke, and the four arc-shaped pole yokes form a certain sub-cavity; a magnet magnet positioning post, a magnet fixing groove is respectively defined on opposite ends of the outer edge of the magnet positioning post, and each magnet fixing groove is fixedly connected with a permanent magnet, and the magnet positioning post is installed
  • the damper device includes an electric device having a damper member, and a rear end of the rotating shaft is coupled to the damper member.
  • the other end of the cover is connected to a fixing seat fixed in the rotating shaft.
  • the damper device includes a fixing head fixedly sleeved in the inner cavity of the outer casing, and one end end surface of the fixing head is provided with two studs, and a through hole is arranged in the middle portion thereof.
  • a rotating member is fixedly connected to one end of the through hole, and a follower is disposed on the end surface of the fixing head; the four cards are arranged in a cross shape.
  • the damper device includes a fixing sleeve that is connected to the inner cavity of the outer casing, and one end of the outer end of the fixing head has a post protruding from opposite ends, wherein a through hole is defined in the end of the through hole, and a follower is fixedly connected to the opposite end of the outer end of the fixed end of the fixed end; a "ten"-shaped spring fixing shell is disposed between the fixing head and the driven member, and an outer side of the protruding "ten"-shaped protruding portion is engaged between the four pillars The four "ten"-shaped protruding portions are respectively provided with a damping spring on the inner side.
  • the shock absorbing member is a strip or a rod of a spring.
  • the magnet fixing groove and the permanent magnet are equal in size, and the cross-sectional shapes of the two are fan-shaped.
  • the two permanent magnets have opposite magnetic directions in the same radial cross section.
  • the coil fixing is a member in which two coil-fixed semi-circular iron cores are butted together, and the coil-fixed semi-circular iron core, the shoe-shaped pole yoke, and the curved pole yoke are integrally formed members. .
  • the coil holder, the shoe-shaped pole yoke, and the arc-shaped pole yoke are integrally formed and stacked by a plurality of magnetic conductive elements having the same shape.
  • the common rotor and stator are used to control the current direction of the coil in the stator, thereby changing the direction of the magnetic field, so that the rotor performs high-frequency reciprocating rotational motion.
  • the alternating magnetic field in the stator is generated by using alternating square wave current, and the driving circuit is generated.
  • the setting is simpler and more convenient for control;
  • the coil holder is made up of two semi-circular cores, which makes the winding process of the coil simple, and the fixing frame is guided by multiple layers.
  • the magnetic components are superimposed, so that the magnetic resistance and eddy current of the middle magnetic circuit are relatively small, the magnetic field loss is reduced, the efficiency is improved, the structure is simple, and the cost is low; and an auxiliary side magnetic field action is also installed in the rotating shaft.
  • the device makes the reciprocating motion of the shaft smoother and greatly improves the efficiency of the system.
  • Figure 1 is a perspective view of a brake structure of the prior art
  • FIG. 2 is a schematic exploded view of a specific embodiment 1 of the present invention.
  • Figure 3 is a schematic cross-sectional view of Figure 2;
  • Figure 4 is a schematic cross-sectional view taken along line A-A of Figure 2;
  • Figure 5 is a schematic cross-sectional view taken along line B-B of Figure 2;
  • Figure 6 is a schematic exploded view of a second embodiment of the present invention.
  • Figure 7 is a cross-sectional view of Figure 5;
  • Figure 8 is a schematic cross-sectional view taken along line C-C of Figure 6;
  • Figure 9 is a schematic cross-sectional view taken along line D-D of Figure 6;
  • Figure 10 is a schematic view of the magnetic direction of Figures 2 and 6;
  • Figure 11 is a schematic exploded view of a third embodiment of the present invention.
  • Figure 12 is a schematic vertical sectional view of Figure 11;
  • Figure 13 is a schematic cross-sectional view of the magnetic pole of Figure 11;
  • Figure 14 is a schematic cross-sectional structural view of the rotating shaft of Figure 13;
  • Figure 15 is a schematic view showing another structure of the rotating shaft of Figure 13;
  • Figure 16 is a bottom view of Figure 13;
  • Figure 17 is a plan view of Figure 13;
  • Figure 18 is a bottom view of Figure 14.
  • an electric toothbrush driving device includes a driving circuit and a casing 1 for sealing dustproof and supporting functions together, and further comprising a driving device.
  • the rotating shaft 2, the two ends of the rotating shaft 2 are respectively provided with a bearing 3, the bearing 3 is fixedly mounted in the inner cavity of the outer casing 1; a coil fixing frame 4 is sleeved in the inner cavity of the outer casing 1, and the coil fixing frame 4 is
  • the inner surface is inwardly projecting with four shoe-shaped pole yokes 5, each of which has a drive coil 6 around which a drive coil 6 and said drive circuit electrodes are connected, said shoe-shaped poles
  • An arc-shaped pole yoke 7 is further connected to the end of the yoke 5, and the four arc-shaped pole yokes 7 form a certain sub-cavity; the middle portion of the rotating shaft 2 is fixedly connected with a circular magnet positioning post 8, and the outer side of the magnet positioning
  • a magnet fixing groove 9 is defined in each of the two ends, and each of the magnet fixing grooves 9 is fixedly connected with a permanent magnet 10, and the magnet fixing groove 9 and the permanent magnet 10 are equal in size, and the cross-sectional shape of the two is a fan shape; Magnet positioning column 8 In the stator inner cavity, the two permanent magnets 10 are opposite in magnetic polarity in the same radial section; a shell-shaped end cap 11 is mounted on one end of the rotating shaft 2, the end cap 11 and the end The outer casing 1 is sealed and fixedly connected; a damping device for reciprocating rotation of the auxiliary rotating shaft is disposed in the inner cavity of the end cover 11; the coil fixing frame 4 is a member formed by the two coil-fixed semi-circular iron cores 41 being butted together.
  • the coil-fixed semi-circular core 41, the shoe-shaped pole yoke 5, and the arc-shaped pole yoke 7 are integrally formed members.
  • the driving circuit emits a periodic oscillating current, so that the direction of the current flowing through the four driving coils 6 sequentially changes, causing a periodic change of the magnetic field in the inner cavity of the stator, and the permanent magnet located in the inner cavity of the stator
  • the magnet 10 generates a driving force according to the changed magnetic field, the driving The driving force rotates the rotating shaft 2 clockwise or counterclockwise.
  • the driving circuit emits a periodic oscillating current in the opposite direction
  • the changing magnetic field generated by the driving coil 6 drives the rotating shaft 1 to rotate in the reverse direction, so that the rotating shaft is a kind of cyclical change. Periodic reciprocating rotation.
  • the damper device at the end of the rotating shaft can make the reciprocating rotation smoother.
  • the driven member 15a When the rotating shaft 2 ⁇ rotates in the forward direction, the driven member 15a is rotated, and the position of the post 13a on the follower 15a is shifted.
  • the extension damper spring 17a is pressed, thereby deforming the damper tension spring 17a, and the damper tension spring 17a generates a force in a direction opposite to the direction of rotation of the motor, hindering the rotation of the motor; when the balance of the force is reached, the movement speed of the rotation shaft 2 is not increased.
  • an electric toothbrush driving device includes a driving circuit and a casing 1 for sealing dustproof and supporting functions together, and further comprising a driving device
  • the rotating shaft 2, the two ends of the rotating shaft 2 are respectively provided with a bearing 3, the bearing 3 is fixedly mounted in the inner cavity of the outer casing 1; a coil fixing frame 4 is sleeved in the inner cavity of the outer casing 1, and the coil fixing frame 4 is The inner surface uniformly protrudes inwardly with four shoe-shaped pole yokes 5, each of which has a drive coil 6 around which the drive coil 6 and the drive circuit are electrically connected, each of the shoe-shaped pole yokes 5
  • the end of the rotating shaft 2 is fixedly connected with a circular magnet positioning post 8 and the opposite ends of the outer contour side of the magnet positioning post 8
  • Upper score A magnet fixing groove 9 is defined, and each of the magnet fixing grooves 9 is fixedly connected with a permanent magnet 10, and the magnet fixing groove 9 and
  • the magnet positioning post 8 is a member formed by stacking a plurality of magnetically-shaped components of the same shape; the coil holder 4, the shoe-shaped pole yoke 5 and the arc-shaped pole yoke 7 are integrally formed and have a plurality of shapes A member in which the same magnetically conductive elements are stacked.
  • the damper device includes a fixing head 12 fixedly sleeved in the inner cavity of the outer casing 1.
  • the outer end of the end surface of the fixing head 12 has a post 13 extending from the opposite ends, and a through hole is formed in the middle portion.
  • the rotating shaft 2 is fixedly connected to the end of one end of the through hole 14 with a follower 15 , and the follower 15 protrudes from the outer end of the end surface of the fixed end 12
  • the utility model further includes a "ten"-shaped spring fixing shell 16 which is installed between the fixing head 12 and the driven member 15, and the outer side of the protruding "ten"-shaped protruding portion is engaged at the outer side. Between the four posts 13, a damping spring 17 is respectively disposed inside the four "ten" shaped protruding portions.
  • the driving circuit emits a periodic oscillating current, so that the direction of the current flowing through the four driving coils 6 sequentially changes, causing a periodic change of the magnetic field in the inner cavity of the stator, and the permanent magnet located in the inner cavity of the stator 10 will generate a driving force according to the changed magnetic field, the driving force drives the rotating shaft 2' to rotate clockwise or counterclockwise.
  • the driving circuit emits a periodic oscillating current in the opposite direction
  • the changing magnetic field generated by the driving coil 6 drives the rotating shaft 2 to do
  • the reverse rotation which changes periodically, causes the shaft to make a periodic reciprocating rotation.
  • the damper device at the end of the rotating shaft can make the reciprocating rotation smoother.
  • the damper spring 17 When the rotating shaft 2 rotates in the forward direction, the driven member 15 is driven to rotate, and the damper spring is pressed by the follower 15 and the damper spring 17, thereby making the damper spring 17 is deformed, the damper spring 17 generates a force in a direction opposite to the direction of rotation of the motor, hinders the rotation of the motor; when the balance of the force is reached, the speed of movement of the shaft 2 does not increase, but the deformation of the damper spring 17 is further increased, damping The force generated by the deformation of the spring 17 is increasing, and the speed of the movement of the rotating shaft 2 is decreasing until the motor speed is reduced to zero. At this time, the driving circuit starts to reversely output the current of the driving coil 6, so that the rotating shaft 3 is reversely rotated.
  • the magnetic properties of the two permanent magnets 10 are opposite in the same radial section (see FIG. 10), and in other embodiments of the invention, the two permanent magnets 10 are The magnetic properties may be the same in the same radial section, and accordingly, the driving magnetic field may also have a corresponding change, that is, the four driving coils 6 are driven into the driving currents of different combinations in the above embodiments, and are driven.
  • the combination of currents is a general technique in the art and will not be described in detail herein.
  • an electric toothbrush driving device includes a driving circuit and sealing together
  • the dust and the supporting outer casing 1 further includes a driving shaft 2, and the two ends of the rotating shaft 2 are respectively provided with a bearing 3, and the bearing 3 is fixedly mounted in the inner cavity of the outer casing 1; in the inner cavity of the outer casing 1 A coil holder 4 is sleeved, and the inner surface of the coil holder 4 uniformly protrudes inwardly with four shoe-shaped pole yokes 5, each of which has a drive coil 6, a drive coil 6 and the drive circuit Electrically connected, an end of each shoe-shaped yoke 5 is also connected with an arc-shaped pole yoke 7 and four arc-shaped pole yokes 7 Forming a certain sub-cavity; four fan-shaped magnets 10 are fixedly connected to the middle portion of the rotating shaft 2, and the outer contours of the four magnet
  • the magnet fixing sleeve 8 is installed in the stator inner cavity, and the four permanent magnets 10 have the same magnetic force in the same radial section; and a cylindrical fixing seat is arranged at one end of the rotating shaft 2 12, the fixing seat 12 is connected with the spring 17, and the other end is connected with the fixing seat 13.
  • the fixing seat 13 is fixedly connected with the end cover 15.
  • the inner cavity of the end cover 15 is provided with a damping device for reciprocating rotation of the auxiliary rotating shaft.
  • the coil holder 4, the shoe-shaped pole yoke 5, and the arc-shaped pole yoke 7 are integrally formed and laminated by a plurality of magnetically-shaped members having the same shape.
  • the damper device comprises a rear end of the rotating shaft (2) connected with a damper member (17), the damper member (17) is fixedly connected to the rear end end cover (15) of the rotating shaft (2), The other end is connected to a fixing seat (12) fixed in the rotating shaft (2).
  • the driving circuit emits a periodic oscillating current, so that the direction of the current flowing through the four driving coils 6 sequentially changes, causing a periodic change of the magnetic field in the inner cavity of the stator, and the permanent magnet located in the inner cavity of the stator 10 will generate a driving force according to the changed magnetic field, the driving force drives the rotating shaft 2 to rotate clockwise or counterclockwise.
  • the driving circuit emits a periodic oscillating current in the reverse direction
  • the changing magnetic field generated by the driving coil 6 drives the rotating shaft 2 to reverse
  • the rotation of the direction such as periodic changes, causes the shaft to make a periodic reciprocating rotation.
  • the damper device at the end of the rotating shaft can make the reciprocating rotation smoother.
  • the driven member 17 When the rotating shaft 2 rotates in the forward direction, the driven member 17 is rotated, and the follower 17 and the fixing base B (13) are pressed.
  • the damping spring 17 is deformed, and the damping spring 17 generates a force in a direction opposite to the direction of rotation of the motor, hindering the rotation of the motor; when the balance of the force is reached, the moving speed of the rotating shaft 2 does not increase, but the deformation of the damping spring 17 is further increased. , the deformation of the damping spring 17 is generated
  • the force is increasing, and the speed of the movement of the shaft 2 is decreasing until the motor speed is reduced to zero.
  • the driving circuit starts to reversely output the current of the driving coil 6, so that the rotating shaft 3 rotates in the reverse direction, repeating the foregoing actions;
  • the driving circuit In order to maximize the efficiency of the motor, it is necessary to accurately select the time of the direction change of the output current of the drive circuit. Experiments have shown that when the shaft 2 moves between the maximum speed and zero, the direction change of the current will make the reciprocating rotation action smoother and more efficient.
  • the magnetic properties of the four permanent magnets 10 are different in the same radial cross section (see FIG. 14), and accordingly, the driving magnetic field also has a corresponding change, that is,
  • the four drive coils 6 are connected to the drive currents of different combinations in the above embodiments, and the combination of the drive currents belongs to the general art in the art, and will not be described in detail herein.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Brushes (AREA)

Description

电动牙刷驱动装置
技术领域
本发明涉及个人清洁用品, 具体涉及一种电动牙刷驱动装置。
背景技术
在传统的电动牙刷中,电动机的驱动轴的旋转运动被运动转换机构转换 成往复直线运动或往复旋转运动, 安装在运动转换机构的驱动轴是牙刷头在 驱动轴的轴向方向做往复运动或围绕驱动轴的中心轴往复地旋转.
在传统的电动牙刷中,这种转换机构常常是齿轮机构或是凸轮机构,以将 电动机的驱动轴的连续旋转运动转换成运动转换机构的驱动轴的往复直线运 动或围绕驱动轴的中心轴往复旋转运动,由于转换机构的存在,难以高速的移 动牙刷头,从而限制了去除齿菌斑的效果.
而现有技术中, 如中国专利 "电动牙刷", 申请号是: 200380100676.8, 该电动牙刷包括牙刷头和用于移动该牙刷头的致动器, 该致动器即该电动牙 刷的驱动装置, 包括有驱动轴、 用于上下往复移动所述驱动轴的第一磁路以 及用于往复旋转所述驱动轴的第二磁路; 而该第二磁路主要是通过电路中的 逆变器产生的周期变化的电压来驱使线圈产生周期变化的电流, 从该专利的 结构可知,线 ή是螺线管结构,线圈中电流产生变化的磁场,从而磁化通过螺线 管的靴形极轭,进而使螺线管靴形极轭产生交变的磁极, 从而与转子相作用, 使驱动轴产生往复旋转运动;由于线圈电流是磁化螺线管通过螺线管的靴形 极轭,由于两靴形极轭为分开设置,其一装配时工艺复杂,其二吏磁路的结构变 的复杂,且磁阻很大,使得磁场能量损耗较大, 效率降低。 发明内容
本发明的目的在于克服现有技术的缺陷, 提供一种损耗低、 效率高, 结 构简单的电动牙刷驱动装置。
本发明提供的技术方案如下: 一种电动牙刷驱动装置, 包括有一驱动电 路以及一起密封防尘及支撑作用的外壳, 还包括有一驱动转轴, 转轴的两 端颈部分别装设有一轴承, 轴承固定装设在所述外壳内腔; 在所述外壳内 腔中套接有一线圈固定架, 线圈固定架内表面向内均匀伸出有四个靴形极 轭, 每个靴形极轭绕有一个驱动线圈, 驱动线圈和所述驱动电路电极连接, 所述每个靴形极轭的末端还连接有一弧形极轭, 四个弧形极轭形成一定子 内腔; 所述转轴中段固定连接有一圆形磁铁定位柱, 磁铁定位柱外轮廓边 的相对两端上分别开设有一磁铁固定槽, 每个磁铁固定槽上固定连接有一 永磁磁铁, 所述磁铁定位柱装设在所述定子内腔中; 在所述转轴的一端端 部装设有一壳状端盖, 该端盖和所述外壳密封式固定连接; 在所述端盖的 内腔中装设有一辅助转轴往复转动的阻尼装置。 '
作为优选, 上述电动牙刷驱动装置中, 所述阻尼装置包括一种具有减 震件的电动装置, 所述转轴的后端连接有一减震件所述减震件一端固定连 接在转轴的后端端盖, 其另一端连接于固定在转轴内的固定座上。
作为优选, 上述电动牙刷驱动装置中, 所述阻尼装置包括有一固定套 接在所述外壳内腔中的固定头, 固定头的一端端面装设有两个卡柱, 其中 部设有一通孔, 所述转轴穿过该通孔的一端端部固定连接有一从动件, 从 动件相对所述固定头一端端面装设有两个卡柱; 该四个卡 ¾成十字形布置, 作为优选, 上述电动牙刷驱动装置中, 所述阻尼装置包括有一固定套' 接在所述外壳内腔中的固定头, 固定头的一端端面外轮廓相对两端分别伸 出有一个卡柱, 其中部设有一通孔, 所述转轴穿过该通孔的一端端部固定 连接有一从动件, 从动件相对所述固定头一端端面的外轮廓相对两端分别 伸出有一卡柱; 还包括有一 "十"字型弹簧固定壳, 该固定壳装设在所述 固定头和从动件之间, 其伸出的 "十"字型突出部位外侧卡接在所述四个 卡柱之间, 该四个 "十"字型突出部位内侧分别装设有一阻尼弹簧。
作为优选, 所述的减震件为弹簧的条形体或棒形体。
作为优选, 上述电动牙刷驱动装置中, 所述磁铁固定槽和永磁磁铁大 小相等, 两 的截面型状是扇形。
作为优选, 上述电动牙刷驱动装置中, 所述两个永磁磁铁在同一个径 向截面的磁性相反。
- 作为优选, 上述电动牙刷驱动装置中, 所述线圈固定 是由两个线圈 固定半圆铁芯对接而成的构件, 线圈固定半圆铁芯、 靴形极轭和弧形极轭 是一体成型的构件。
作为优选, 上述电动牙刷驱动装置中, 所述线圈固定架、 靴形极轭和 弧形极轭是一体成型、 且由若干个形状相同的导磁元件叠置而成的构件。
本发明具有以下优点:
采用普通的转子和定子, 配合控制定子中线圈的电流方向, 从而变动磁 场方向, 使得转子做高频往复的旋转运动, 定子中交变磁场是由于采用交 变的方波电流产生的, 驱动电路设置更加简单利于控制; 线圈固定架由两 个半圆铁芯对接而成, 使线圈的绕制工艺变的简单,且该固定架是由多层导 磁元件叠加而成,使得中间的磁回路的磁阻和涡流相对较少,减少了磁场损 耗, 提高效率且结构简单, 成本低廉; 在所述转轴中还装设有一辅助交边 磁场动作的 fe尼装置, 使得转轴的往复动作更为流畅, 大大提高系统的效 率。
附图说明
图 1是现有技术的制动器结构立体图;
图 2是本发明具体实施例一的爆炸示意图;
图 3是图 2的剖面示意图;
图 4是图 2中 A-A剖面示意图;
图 5是图 2中 B-B剖面示意图;
图 6是本发明具体实施例二的爆炸示意图;
- 图 7是图 5剖面示意图;
图 8是图 6中 C-C剖面示意图;
图 9是图 6中 D-D剖面示意图;
图 10是图 2与图 6的磁力方向示意图;
图 11是本发明具体实施例三的爆炸示意图;
图 12是图 11中竖剖面示意图;
图 13是图 11的磁极横剖面示意图;
图 14是图 13的转轴横剖面结构示意图;
图 15是图 13的的另一种转轴结构示意图;
图 16是图 13的仰视图;
图 17是图 13的俯视图; 图 18是图 14的仰视图。
具体实施方式
下面结合附图对具体的实施方式加以说明:
本发明的具体实施例一, 如图 2、 图 3、 图 4和图 5所示, 一种电动牙 刷驱动装置,包括有一驱动电路以及一起密封防尘及支撑作用的外壳 1,还 包括有一驱动转轴 2, 转轴 2的两端颈部分别装设有一轴承 3, 轴承 3固定 装设在所述外壳 1内腔;在所述外壳 1内腔中套接有一线圈固定架 4,线圈 固定架 4内表面向内均勾伸出有四个靴形极轭 5,每个靴形极轭 5绕有一个 驱动线圈 6,'驱动线圈 6和所述驱动电路电极连接,所述每个靴形极轭 5的 末端还连接有一弧形极轭 7, 四个弧形极轭 7形成一定子内腔; 所述转轴 2 中段固定连接有一圆形磁铁定位柱 8,磁铁定位柱 8外轮廓边的相对两端上 分别开设有一磁铁固定槽 9, 每个磁铁固定槽 9上固定连接有一永磁磁铁 10, 所述磁铁固定槽 9和永磁磁铁 10大小相等, 两者的截面型状是扇形; 所述磁铁定位柱 8装设在所述定子内腔中, 该两个永磁磁铁 10在同一个径 向截面的磁性相反; 在所述转轴 2的一端端部装设有一壳状端盖 11, 该端 盖 11和所述外壳 1密封式固定连接; 在所述端盖 11的内腔中装设有一辅 助转轴往复转动的阻尼装置; 所述线圈固定架 4是由两个线圈固定半圆铁 芯 41对接而成的构件,线圈固定半圆铁芯 41、靴形极轭 5和弧形极轭 7是 一体成型的构件。
动作时, 驱动电路发出周期性的振荡电流, 使得流经四个驱动线圈^ 6 的电流方向依次顺序变化, 引起了所述定子内腔内的磁场周期变化, 而位 于该定子内腔的永磁磁铁 10会根据该变化的磁场产生一个驱动力, 该驱动 力驱使转轴 2顺时针或逆时针转动, 当驱动电路发出反方向的周期振荡电 流时, 驱动线圈 6产生的变化磁场会驱使转轴 1做反向的旋转, 如此周期 性变化, 使得转轴做一种周期性的往复转动。
而位于转轴末端的阻尼装置可以使得在做往复转动时更为顺畅, 当转 轴 2·正向转动时, 会带动从动件 15a转动, 由于从动件 15a上的卡柱 13a 位置偏移, 拉伸阻尼拉簧 17a紧压, 从而使阻尼拉簧 17a产生变形, 阻尼 拉簧 17a产生产生与马达转动方向相反方向的力, 阻碍马达转动; 当达到 力的平衡时, 转轴 2的运动速度不在增大, 但由于阻尼拉簧 17a的形变在 进一步增加, 阻尼拉簧 17a的形变产生的力在增加, 这时转轴 2运动的速 度在减少, 直到电机速度减为零, 这个时候, 驱动电路开始反向输出驱动 线圈 6的电流, 使得转轴 3反向转动, 重复前述动作; 当然, 为使得电机 效率-最大, 必需准确选取驱动电路输出电流方向转变的时间, 实验证明, 当转轴 2运动到最大速度和零之间, 电流方向转变会使得往复转动动作更 为顺畅, 效率最大。
本发明的具体实施例二, 如图 6、 图 7、 图 8和图 9所示, 一种电动牙 刷驱动装置,包括有一驱动电路以及一起密封防尘及支撑作用的外壳 1,还 包括有一驱动转轴 2, 转轴 2的两端颈部分别装设有一轴承 3, 轴承 3固定 装设在所述外壳 1内腔;在所述外壳 1内腔中套接有一线圈固定架 4,线圈 固定架 4内表面向内均匀伸出有四个靴形极轭 5,每个靴形极轭 5绕有一个 驱动线圈 6,驱动线圈 6和所述驱动电路电连接,所述每个靴形极轭 5的末 端还连接有一弧形极轭 7, 四个弧形极轭 7形成一定子内腔;所述转轴 2中 段固定连接有一圆形磁铁定位柱 8,磁铁定位柱 8外轮廓边的相对两端上分 别开设有一磁铁固定槽 9, 每个磁铁固定槽 9上固定连接有一永磁磁铁 10, 所述磁铁固定槽 9和永磁磁铁 10大小相等, 两者的截面型状是扇形; 所述 磁铁定位柱 8装设在所述定子内腔中, 该两个永磁磁铁 10在同一个径向截 面的磁性相反; 在所述转轴 2的一端端部装设有一壳状端盖 11, 该端盖 11 和所述外壳 1密封式固定连接; 在所述端盖 11的内腔中装设有一辅助转轴 往复转动的阻尼装置。 所述磁铁定位柱 8是由若干片形状相同的导磁元件 叠置而成的构件;所述线圈固定架 4、靴形极轭 5和弧形极轭 7是一体成型、 且由若干个形状相同的导磁元件叠置而成的构件。
所述阻尼装置包括有一固定套接在所述外壳 1内腔中的固定头 12, 固 定头 12的一端端面外轮廓相对两端分别伸出有一个卡柱 13,其中部设有一 通孔.14, 所述转轴 2穿过该通孔 14的一端端部固定连接有一从动件 15, 从动件 15相对所述固定头 12—端端面的外轮廓相对两端分别伸出有一卡 柱 13; 还包括有一 "十"字型弹簧固定壳 16, 该固定壳 16装设在所述固 定头 12和从动件 15之间, 其伸出的 "十"字型突出部位外侧卡接在所述 四个卡柱 13之间, 该四个 "十"字型突出部位内侧分别装设有一阻尼弹簧 17。
动作时, 驱动电路发出周期性的振荡电流, 使得流经四个驱动线圈 6 的电流方向依次顺序变化, 引起了所述定子内腔内的磁场周期变化, 而位 于该定子内腔的永磁磁铁 10会根据该变化的磁场产生一个驱动力, 该驱动 力驱使转轴 2 '顺时针或逆时针转动, 当驱动电路发出反方向的周期振荡电 流时, 驱动线圈 6产生的变化磁场会驱使转轴 2做反向的旋转, 如此周期 性变化, 使得转轴做一种周期性的往复转动。 而位于转轴末端的阻尼装置可以使得在做往复转动时更为顺畅, 当转 轴 2正向转动时, 会带动从动件 15转动, 由于从动件 15与阻尼弹簧 17紧 压, 从而使阻尼弹簧 17产生变形, 阻尼弹簧 17产生产生与马达转动方向 相反方向的力, 阻碍马达转动; 当达到力的平衡时, 转轴 2的运动速度不 在增大, 但由于阻尼弹簧 17的形变在进一步增加, 阻尼弹簧 17的形变产 生的力在增加, 这时转轴 2运动的速度在减少, 直到电机速度减为零, 这 个时候, 驱动电路开始反向输出驱动线圈 6的电流, 使^得转轴 3反向转动, 重复前述动作; 当然, 为使得电机效率最大, 必需准确选取驱动电路输出 电流方向转变的时间, 实验证明, 当转轴 2运动到最大速度和零之间, 电 流方向转变会使得往复转动动作更为顺畅, 效率最大。
在上述实施例中, 所述两个永磁磁铁 10的磁性在同一个径向截面上是 相反的 (见图 10), 而在本发明的其他实施例中, 该两个永磁磁铁 10的磁 性在同一个径向截面上可以是相同的, 与此相应, 其驱动磁场也会有相应 的变化, 即所述四个驱动线圈 6通入于上述实施例中组合方式不同的驱动 电流, 驱动电流的组合方式属于本领域的一般技术, 这里不做详细说明。
本发明的具体实施例三, 如图 10、 图 11、 图 12、 图 14、 图 15、 图 16、 图 17、 图 18所示, 一种电动牙刷驱动装置, 包括有一驱动电路以及一起密 封防尘及支撑作用的外壳 1, 还包括有一驱动转轴 2, 转轴 2的两端颈部分 别装设有一轴承 3,轴承 3固定装设在所述外壳 1内腔;在所述外壳 1内腔 中套接有一线圈固定架 4,线圈固定架 4内表面向内均匀伸出有四个靴形极 轭 5, 每个靴形极轭 5绕有一个驱动线圈 6, 驱动线圈 6和所述驱动电路电 连接, 所述每个靴形极轭 5的末端还连接有一弧形极轭 7, 四个弧形极轭 7 形成一定子内腔;所述转轴 2中段固定连接有四块扇形磁铁 10,, 四块磁铁 外轮廓镶嵌一磁铁固定套 8, 所述永磁磁铁 10大小相等, 四者的截面型状 是扇形; 所述磁铁固定套 8装设在所述定子内腔中, 该四个永磁磁铁 10在 同一个径向截面的磁性相同; 在, 所述转轴 2的一端端部装设有一柱状固 定座 12, 该固定座 12和弹簧 17连接, 另一头与固定座 13连接, 固定座 13与端盖 15固定连接; 在所述端盖 15的内腔中装设有一辅助转轴往复转 动的阻尼装置。 所述线圈固定架 4、 靴形极轭 5和弧形极轭 7是一体成型、 且由若干个形状相同的导磁元件叠置而成的构件。 所述阻尼装置包括有所 述转轴 (2) 的后端连接有一减震件(17)所述减震件(17)—端固定连接 在转轴 (2) 的后端端盖(15), 其另一端连接于固定在转轴 (2) 内的固定 座 (12)上。
动作时, 驱动电路发出周期性的振荡电流, 使得流经四个驱动线圈 6 的电流方向依次顺序变化, 引起了所述定子内腔内的磁场周期变化, 而位 于该定子内腔的永磁磁铁 10会根据该变化的磁场产生一个驱动力, 该驱动 力驱使转轴 2顺时针或逆时针转动, 当驱动电路发出反方向的周期振荡电 流时, 驱动线圈 6产生的变化磁场会驱使转轴 2做反向的旋转, 如此周期 性变化, 使得转轴做一种周期性的往复转动。
而位于转轴末端的阻尼装置可以使得在做往复转动时更为顺畅, 当转 轴 2正向转动时, 会带动从动件 17转动, 由于从动件 17与固定座 B (13) 紧压, 从而使阻尼弹簧 17产生变形, 阻尼弹簧 17产生与马达转动方向相 反方向的力, 阻碍马达转动; 当达到力的平衡时, 转轴 2的运动速度不在 增大, 但由于阻尼弹簧 17的形变在进一步增加, 阻尼弹簧 17的形变产生 的力在增加, 这时转轴 2运动的速度在减少, 直到电机速度减为零, 这个 时候, 驱动电路开始反向输出驱动线圈 6的电流, 使得转轴 3反向转动, 重复前述动作; 当然, 为使得电机效率最大, 必需准确选取驱动电路输出 电流方向转变的时间, 实验证明, 当转轴 2运动到最大速度和零之间, 电 流方向转变会使得往复转动动作更为顺畅, 效率最大。
在上述实施例中, 所述四个永磁磁铁 10的磁性在同一个径向截面上是 相异的(见图 14), 与此相应, 其驱动磁场也会有相应的变化, 即所述四个 驱动线圈 6通入于上述实施例中组合方式不同的驱动电流, 驱动电流的组 合方式属于本领域的一般技术, 这里不做详细说明。
当然, 以上的实施例只是在于说明而不是限制本发明, 以上所述仅是 本发明的较佳实施例, 故凡依本发明专利申请范围所述的构造、 特征及原 理所做的等效变化或修饰, 均包括于本发明专利申请范围内。

Claims

1、 一种电动牙刷驱动装置, 包括有一驱动电路以及一起密封防尘及支 撑作用的外壳(1 ), 其特征在于: 还包括有一驱动转轴(2), 转轴(2) 的 两端颈部分别装设有一轴承权(一3), 轴承 (3) 固定装设在所述外壳(1 ) 内 腔; 在所述外壳 (1 ) 内腔中套接有一线圈固定架 (4), 线圈固定架 (4)
;利
由两个半圆铁芯 (41 )对接而成, 半圆铁芯 (41 )的内表面向内均匀伸出有两 个靴形极轭(5),每个靴形极轭(5)绕有一个驱动线圈(0),驱动线圈(6) 和所述驱动电路电极连接, 所述每个靴形极轭求(5) 的末端还连接有一弧形 靴形极轭 (7), 两个靴形极轭 (7) 形成一定子内腔; 所述转轴 (2) 中段 固定连接有四块扇形磁铁 10,, 四块磁铁外轮廓镶嵌一磁铁固定套 8, 所述 永磁磁铁 10四者的截面型状是扇形, 大小相等, 该四个永磁磁铁 10在同 一个径向截面的磁性相同; (10), 所述磁铁固定套(8)装设在所述定子内 腔中; 圆形衬套(16)用以控制线圈固定架(4) 的位置。 在所述转轴(2) 的一端端部装设固定座(12), 该固定座(12)其另一端连接于固定在端盖
( 15.) 内的固定座 (13)上。
2、一种电动牙刷驱动装置, 包括有一驱动电路以及一起密封防尘及支 撑作用的外壳(1), 其特征在于: 还包括有一驱动转轴(2), 转轴 (2) 的 两端颈部分别装设有一轴承 (3), 轴承 (3) 固定装设在所述外壳 (1) 内 腔; 在所述外壳 (1 ) 内腔中套接有一线圈固定架 (4), 线圈固定架 (4) 由两个半圆铁芯 (41)对接而成, 半圆铁芯 (41)的内表面向内均匀伸出有两个 靴形极轭(5), 每个靴形极轭(5)绕有一个驱动线圈 (6), 驱动线圈 (6) 和所述驱动电路电极连接, 所述每个靴形极轭(5) 的末端还连接有一弧形 靴形极轭(7), 两个靴形极轭 (7)形成一定子内腔; 所述转轴 (2) 中段 固定连接有一圆形磁铁定位柱(8), 磁铁定位柱(8)外轮廓边的相对两端 上分别开设有一磁铁固定槽(9), 每个磁铁固定槽(9)上固定连接有一永 磁磁铁 (10), 所述磁铁定位柱 (8) 装设在所述定子内腔中; 在所述转轴 (2) 的一端端部装设有一壳状端盖 (11), 该端盖 (11)和所述外壳(1) 密封式固定连接; 在所述端盖 (11) 的内腔中装设有一辅助转轴往复转动 的阻尼装置。
3、 根据权利要求 1所述的一种具有减震件的电动装置, 其特征在于: 所述转轴 (2) 的后端连接有一减震件(17)所述减震件(17)—端固定连 接在转轴(2) 的后端端盖 (15), 其另一端连接于固定在转轴 (2) 内的固 定座 (12)上。 所述的减震件 (3) 为弹簧的条形体或棒形体。
4、 根据权利要求 2所述的电动牙刷驱动装置, 其特征在于: 所述磁铁 固定槽 (9)和永磁磁铁(10) 大小相等, 两者的截面型状是扇形。
5、 根据权利要求 2所述的电动牙刷驱动装置, 其特征在于: 所述两个 永磁磁铁(10)在同一个径向截面的磁性相反。
6、 根据权利要求 1与 2所述的电动牙刷驱动装置, 其特征在于: 所述 线圈固定架(4)是由两个半圆铁芯(41)对接而成的构件,半圆铁芯(41)、 靴形极轭(5)和弧形极轭(7) 是一体成型的构件。
7、 根据权利要求 1所述的电动牙刷驱动装置, 其特征在于: 所述线圈 固定架 (4)、 靴形极轭 (5)和弧形极轭 (7) 是一体成型、 且由若干个形 状相同的导磁元件叠置而成的构件。 8、 根据权利要求 2所述的电动牙刷驱动装置, 其特征在于: 所述阻尼 装置包括有一固定套接在所述外壳(1 )内腔中的固定头(12a),固定头(12a) 的一端端面装设有两个卡柱 (13a), 其中部设有一通孔 (14a), 所述转轴
(2a) 穿过该通孔(14a) 的一端端部固定连接有一从动件(15a), 从动件 ( 15a) 相对所述固定头 (12a) —端端面装设有两个卡柱 (13a); 该四个 卡柱 (13a) 成十字形布置, 相邻的两个卡柱(13a) 上分别装设有一阻尼 拉簧(17a)。
9、 根据权利要求 2所述的电动牙刷驱动装置, 其特征在于: 所述阻尼 装置包括有一固定套接在所述外壳(1)内腔中的固定头(12), 固定头(12) 的一端端面外轮廓相对两端分别伸出有一个卡柱(13), 其中部设有一通孔
( 14), 所述转轴 (2) 穿过该通孔 (14) 的一端端部固定连接有一从动件
( 15), 从动件(15)相对所述固定头(12) —端端面的外轮廓相对两端分 别伸出有一卡柱(13 ); 还包括有一 "十"字型弹簧固定壳 (16), 该固定 壳 (16) 装设在所述固定头 (12) 和从动件 (15) 之间, 其伸出的 "十" 字型突出部位外侧卡接在所述四个卡柱 (13) 之间, 该四个 "十"字型突 出部位内侧分别装设有一阻尼弹簧(17)。
PCT/CN2009/000896 2009-01-05 2009-08-07 电动牙刷驱动程序 WO2010075660A1 (zh)

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