CN1266302A

CN1266302A - Hexahedron shaped vibration motor

Info

Publication number: CN1266302A
Application number: CN99126640A
Authority: CN
Inventors: 严成起; 李禹范; 黄庠文
Original assignee: HYESUNG INDUSTRY Co Ltd
Current assignee: HYESUNG INDUSTRY Co Ltd
Priority date: 1998-11-10
Filing date: 1999-11-10
Publication date: 2000-09-13
Also published as: KR19990014446A; JP3310248B2; JP2000279885A; KR100283495B1

Abstract

To reduce design defects, and to lower manufacturing cost by miniaturizing a vibrating motor by using quadripole, externally rectangular and internally circular permanent magnet, generating sufficient torque and making it easy to secure a space for mounting the motor in an appliance. This motor comprises square cases 11, 13 in which holes 38, 39 are formed to install bearings 12, 14 and recessed grooves 35, 36 are formed in one side of the side faces, a permanent magnet, a holder 24 capable of rotating in the inside of the magnet, a washer 15 installed between the bearing 12 and a weight 16, and a shaft 30 penetrating the bearing 14 fixed in a plurality of brushes 32, 23 having elasticity as to be brought into contact with PCB, the washer, the weight 16, a rotor holder 24, and a PCB 34. The permanent magnet is made up of a plurality of magnets having a rectangular outer shape and a circular inner shape and installed in the square case 11, and the holder 24 comprises a coils 26a-c wound on a plurality of winding projected parts 25a formed in a side face and an internally installed weight 16, terminal 18, and PCB.

Description

Hexahedron shaped vibration motor

The present invention relates generally to vibrating motor, relate in particular to and be installed in mobile communication terminal that for example the hexahedron shaped vibration motor in cell phone, pcs telephone or the Pocket Bell is used for producing vibration when receiving signal.

Motor is a kind of machine that is used for mechanical energy is converted into electric energy.Motor also is motor.Motor is converted into a kind of torque as mechanical energy to electric energy by generating an electromagnetic field in the air gap between stator and rotor.Like this, according to not coming bright left hand rule, promptly when the conductor by electric current was arranged in magnetic field, a power just was applied on conductor, and bearing just is rotated.

Have the dissimilar motor and the motor of different size.Motor is used to various fields.The application of motor can be determined according to the equipment that links to each other with the axle of motor.This motor is used in the different Electrical and Electronic equipment.For example, can enumerate and be used for, the motor that is used for making the motor of fan rotation and is installed in massager at Pocket Bell and the vibrative motor of portable radiotelephone phone.

Specifically, the vibrating motor that is used for common portable radiotelephone phone or Pocket Bell can be divided into cylindrical motor, clavate motor and coin shape motor.

Conventional cylindrical vibrating motor has been shown in Fig. 1 a and Fig. 1 b.This vibrating motor comprises eccentrically mounted weight 2, bearing 4, permanent magnet 5, motion coil 6 and housing 7.Different with common vibrating motor, conventional cylindrical vibrating motor does not have steel-tooth, but has motion coil 6.In the air gap of motion coil 6 between permanent magnet 5 and housing 7.This vibrating motor is a kind of radial air gap type vibrating motor.In addition, the housing of this motor outside has eccentrically mounted weight.That is, eccentrically mounted weight 2 is installed on the rotor coil axle.

About permanent magnet 5, can use the rare-earth permanent magnet of columniform diametrical magnetization.About the commutation of motor, undertaken by mechanical brush (its contact angle is 180 degree) and commutator (3 sections).The input three-phase current is used for commutation, and commutation is carried out under the angle of 60 degree.

Fig. 2 a and the conventional coin shape vibrating motor of Fig. 2 b explanation.Conventional coin shape vibrating motor has and the conventional identical structure of cylindrical vibrating motor, does not have steel-tooth in its housing.But and conventional cylindrical vibrating motor be that in difference its air gap is formed by vertically (vertically), and a plurality of coil 10 is set in the capacity eccentric bearing 8.Bearing 8 is also as eccentrically mounted weight.When the position according to the gap this motor is carried out the branch time-like, this motor can be classified as axial air-gap motor.This motor magnetic pole 9 is annular, and is magnetized vertically.About magnet 9, can use four utmost points or ends of the earth rare-earth permanent magnet.About the commutation of motor, commutate by mechanical brush (contact angle 90 degree) and commutator (6 sections).The input three-phase current is used for commutation, and commutation is carried out when 30 degree angles.

Be restricted and the cost height when but, the cylindrical and coin shape motor of routine is installed to communication terminal.Promptly under the situation of cylindrical motor, because eccentrically mounted weight is set at the outside of housing, so motor should be installed in the position that does not have interference with other parts, thereby this motor has the shortcoming that needs enough installing spaces.Under the situation of coin shape motor,, make it can not be installed in the narrow space or the position at turning because coin shape motor has wide shape.

In addition, conventional vibrating motor is not suitable for the communicator of miniaturization, and because its more weak oscillation power, the user is not easy to aware the vibration of motor.

About cylindrical vibrating motor, because it has radial air gap and its magnet is a diametrical magnetization, thus the magnetic flux density deficiency of its magnet, thereby its revolving force deficiency.About coin shape vibrating motor, it uses four utmost points or ends of the earth permanent magnet, but has end play, thereby the torque deficiency that produces.

In sum, the size of conventional vibrating motor is big, the cost height, and the torque that produces is little.

Thereby, owing to the problem that occurs in the above-mentioned prior art has been made the present invention, the object of the present invention is to provide a kind of vibrating motor, it can produce enough torques and can install in limited space.

Another object of the present invention is, a kind of vibrating motor that can reduce manufacturing defect and cost is provided.

To achieve these goals, the invention provides a kind of hexahedron shaped vibration motor, it comprises: have centre bore on its roof, and have the lid of breach at the center of the lower limb of sidewall; Be installed in the inside of lid and the permanent magnet that partly is made of a plurality of magnetic, 4 magnetic partly are designed to have square shape, when they are set in the lid, and the described square central opening that has; Be set at the rotor block of the inside of permanent magnet, it has weight mounting groove and terminal mounting groove, and has a plurality of projectioies, is wound with a plurality of coils on described projection; Eccentrically mounted weight is installed in the weight mounting groove of rotor block; Public terminal is set in the mounting groove of rotor block, and links to each other with each overhang; Be fixed on the lower surface of rotor block and comprise a plurality of PCB parts segmentation PCB, a plurality of PCB parts are selecteed to be equipped with a plurality of contact chips, makes to contact with wound coil, thereby can pass through electric current; Flexible PCB is set at below the rotor block, be connected the end of each cable, flow into by the outside of described cable current from motor, and has a brush, first end of each brush is fixed on the circuitous pattern of upper surface of flexible PCB, and second end of each brush is contacted with segmentation PCB flexiblely; Assembling and that the have centre bore together base plate of quilt and lid; And be inserted into described lid, eccentrically mounted weight, rotor body, flexible PCB and base plate and be fixed on the armature spindle that makes in the eccentrically mounted weight that rotor block rotates.

Above and other objects of the present invention, characteristics and advantage will be understood more fully by the detailed description of carrying out below in conjunction with accompanying drawing, wherein:

Fig. 1 a is the perspective view of the cylindrical vibrating motor of routine;

Fig. 1 b is the sectional view of the motor of Fig. 1 a;

Fig. 2 a is the perspective view of the coin shape vibrating motor of routine;

Fig. 2 b is the sectional view of the motor of Fig. 2 a;

Fig. 3 is the perspective view according to the hexahedron shaped vibration motor of the preferred embodiments of the present invention;

The perspective view of taking apart of the motor of Fig. 4 presentation graphs 3;

Fig. 5 is the perspective view of upper shell of the motor of Fig. 3;

Fig. 6 is the sectional view of the motor of Fig. 3; And

Fig. 7 is the bottom view of rotor subject of the motor of Fig. 3.

The external structure lid 11 and the base plate 13 of vibrating motor, and form hexahedron.

Lid 11 has centre bore 38 on roof, have a breach 35 at the lower limb center of sidewall.

Metal bearing 12 is assembled in the centre bore 38.Hollow pad 21 is assembled in the top of covering 11 inside.

Permanent magnet 20 is set at the below of the pad 21 that covers 11 inside.As shown in Figure 5, permanent magnet 20 comprises 4

magnetic part

20a, 20b, 20c, 20d.4

magnetic part

20a, 20b, 20c, 20d are designed to have the square of central opening, make when they are set at when covering 11 inside, contact with inside surface of side wall.Permanent magnet 20 radially is magnetized from centre bore.

Referring to Fig. 4 and Fig. 6, pad 21 is set between the lower surface and permanent magnet 20 that covers 11 roof, and provides an interval between the lower surface of the roof of lid 11 and permanent magnet 20.

The rotor block of being made by synthetic resin 24 is set at the inside of permanent magnet 20.Rotor block 24 is equipped with shallow fitting recess 28 and dark fitting recess 29.

Eccentrically mounted weight 16, a plurality of coil 26a, 26b, and 26c, the PCB 22 of public terminal 18 and segmentation is set in the rotor block 24.Eccentrically mounted weight 16 is semicircular, and is assembled in the dark fitting recess 29 of rotor block 24, thereby makes rotor block 24 obtain eccentrically mounted weight.Eccentrically mounted weight 16 is preferably made by heavy material, for example tungsten.3 protruding 25a, 25b, and 25c is formed near the outer surface of a part of the rotor body 24 the set eccentrically mounted weight 16.3 coiler part 26a, 26b, and 26c with the predetermined number of turn by respectively around protruding 25a, 25b, and on the 25c.Projection 25a, 25b, and 25c preferably is separated from each other the angle of 60 degree.

Semicircular public terminal 18 is assembled in the shallow fitting recess 28.Each coil 26a, 26b, an end that reaches 26c is fixedly joined on the public terminal 18, so that ground connection.Projection 19 is formed on the upper surface of public terminal 18.Each coil 26a, 26b, and 26c the end can be soldered on the projection 19 of public terminal 18.

As shown in Figure 7, the PCB22 of segmentation is bonded in the lower surface of rotor block 24, and the PCB22 of segmentation comprises a plurality of PCB parts.The PCB22 of segmentation is preferably made by electric conducting material, and preferably includes 6 PCB part 23a-23f.Each of a plurality of contact chip 27a-27c is selectively formed the radially outward edge at PCB part 23a-23f.The coil 26a-26c of a plurality of contact chip 27a-27c and coiling contacts, and makes it possible to flow through electric current.A plurality of contact chip 27a-27c preferably are formed on each other PCB part.

Pad 15 is set between metal bearing 12 and the eccentrically mounted weight 16.Pad 15 is sealed in the fitting recess that the top of eccentrically mounted weight 16 forms.Pad 15 is used to reduce the eccentrically mounted weight 16 of rotation and is assembled in friction between the metal bearing 12 that covers on 11.

Flexible PCB34 is fixed on the upper surface of base plate 13 of rotor block 24 belows.A pair of flat cable links to each other with flexible PCB34.Direct current is fed to flexible PCB34 by flat cable.A pair of brush 32 and 33 is installed on the upper surface of flexible PCB34.Each brush 32 and an end of 33 are soldered on the circuit plate on the upper surface of flexible PCB34, and each brush 32 contacts with the PCB22 of segmentation with 33 the other end flexiblely.That is, brush 32 or an end of 33 link to each other with flexible PCB34, and the other end extends upward, and flexible up being remained on the lower surface of rotor body 24.

Be used for to finish the connection processing that brush 32 and 33 is connected on the flexible PCB34 by the brush parts of single structure being welded on the flexible PCB34 and the brush parts being cut into two brushes.Utilize this processing, can simplify connection processing, and brush 32 and 33 is provided with symmetrically.

Base plate 13 has breach 13, seal groove 37 and centre bore 39, and breach 36 is formed like this, makes the horizontal external world of seal groove 37 and base plate 13 communicate.Metal bearing 14 is assembled in the centre bore 39, and flexible PCB34 is sealed in the seal groove 37.

The breach 36 of base plate 13 has the size identical with covering 11 breach 35, and is used to provide a space, and when lid 11 was assembled on the base plate 13, the cable of flexible PCB34 was through described space.

The assembling of lid 11 and base plate 13 is preferably undertaken by riveting process.

Armature spindle 30 is inserted into metal bearing 12 and 14, pad 15, eccentrically mounted weight 16, rotor block 24 and flexible PCB34, thus and be fixed to rotor block 24 is rotated.

Electric current is sent to brush 32 and 33 from flexible PCB 34.Then, electric current is sent to the PCB part that contacts with brush 32,33 from brush 32 and 33.After this, the PCB of contact part is delivered to electric current the coil that partly links to each other with the PCB that contacts.As a result, rotor body 24 rotates with certain orientation and speed according to the direction of magnetization of magnet 20.

At this moment, rotor block 24 is owing to the eccentrically mounted weight 16 of installing is vibrated.The vibration of rotor block 24 is delivered to by armature spindle 30 and covers 11 and base plate 13, thereby makes and cover 11 and base plate 13 vibrations.

As mentioned above, motor 100 utilizes the out-of-balance force operation that is produced by the rotation of the rotor of eccentrically mounted weight.According to this operating feature, rotor 100 of the present invention is different with conventional coin shape rotor 2.

Because hexahedron shaped vibration motor of the present invention has the gap of radially extending, so motor 100 is the same classified in the radial gap type motor with conventional cylindrical electrical machine 1 according to the method for sorting out according to the shape in gap.But, conventional cylindrical electrical machine 1 has eccentrically mounted weight in its outside, and hexahedron shaped vibration motor of the present invention 100 within it portion have the coil of wire-wound and have the rotor of eccentrically mounted weight.

Because rotor plays eccentrically mounted weight, so the Coin shape motor 2 with routine is the same in this for hexahedron shaped vibration motor of the present invention 100.But, the difference of the Coin shape motor 2 of hexahedron shaped vibration motor 100 and routine is that hexahedron shaped vibration motor 100 uses radial clearances, and conventional Coin shape motor 2 uses end plays.

Magnet 20 in this hexahedron shaped vibration motor 100 has the square configuration that comprises central opening, and the magnet 5 in cylindrical electrical machine 1 is columniform, and magnet 9 is arches.Thereby they are different on shape and function.In addition, each magnet 5 and 9 of conventional motor is monolithic entitys, and the magnet 20 of motor of the present invention is divided into a plurality of magnetic part 20a-20d.Therefore, use 4 utmost point magnets 20 in the present invention.

About the commutation of motor, its commutation realizes by mechanical brush 32 and 33 (contact angle is 90 degree) and commutator (6).The input three-phase current commutates, and commutation is carried out when 30 degree angles.

Because hexahedron motor of the present invention has little size, best 10mm * 10mm * 4mm so this motor can vertically be installed on the sidewall of device, and can be installed on the corner of device.Thereby can be easily motor is installed in the device and does not have spatial limitation.In addition, do not need independent lead-in wire, because flexible PCB34 and lead-in wire are installed in the inside of motor 100.In addition, coil 26a-26c can be easily on motor 100.

In having the motor of radial clearance, the size of the magnet of motor can be less.On the other hand, the magnetic flux density of motor, torque and speed size direct and magnet is proportional.When the shape of motor was designed to hexahedron, magnet can be have centre bore square.As a result, because magnet has big width, so can produce big magnetic flux density.Say that concisely the shape of motor is designed to square, making increases the size that the torque of motor reduces motor simultaneously.

Additional disclosure, the magnet 20 of this motor 100 is anisotropy magnets of being made by the rubidium of sintering, thereby has reduced the manufacturing cost of motor, and accelerates the response to electric current.

Though the quantity of above-mentioned coil 26a-26c is 3, the quantity of coil can be 2 or 3.In this case, only change the quantity of the PCB of projection, segmentation and brush and the quantity that angle just is enough to change coil is set simply.

In addition, motor 100 of the present invention can be designed to have steel-tooth.In addition, motor 100 of the present invention just can be designed to drive motors 100 by axle 30 being extended to the outside of covering 11 outside or being lengthened to base plate 13.

As mentioned above, the invention provides a kind of vibrating motor, it produces enough torques, can be installed in the limited space, and can reduce manufacturing cost and manufacturing defect.

Though disclose the preferred embodiments of the present invention for illustrative purposes, it will be understood by those of skill in the art that not breaking away from scope of the present invention and the design that claims limit can make various changes and remodeling.

Claims

1, a kind of hexahedron shaped vibration motor comprises:

The lid that has breach at the center of the lower limb of sidewall;

Be installed in the inside of lid and the permanent magnet that partly is made of a plurality of magnetic, 4 magnetic partly are designed to have square shape, when they are set in the lid, and the described square central opening that has;

Be set at the rotor block of the inside of permanent magnet, it has weight mounting groove and terminal mounting groove, and has a plurality of projectioies, is wound with a plurality of coils on described projection;

Be installed in the eccentrically mounted weight in the weight mounting groove of rotor block;

Be set at public terminal in the mounting groove of rotor block and that link to each other with each overhang;

Be fixed on the lower surface of rotor block and comprise a plurality of PCB parts segmentation PCB, a plurality of PCB parts are selecteed to be equipped with a plurality of contact chips, makes to contact with wound coil, thereby can pass through electric current;

Be set at the flexible PCB below the rotor block, it is connected the end of each cable, flow into by the outside of described cable current from motor, and has a brush, first end of each brush is fixed on the circuit plate of upper surface of flexible PCB, and second end of each brush is contacted with segmentation PCB flexiblely;

Assembling and that the have centre bore together base plate of quilt and lid; And

Be inserted into described lid, eccentrically mounted weight, rotor block, flexible PCB and base plate and be fixed on the armature spindle that makes in the eccentrically mounted weight that rotor block rotates.

2, motor as claimed in claim 1, wherein said permanent magnet comprise 4 magnet part, and a pad is set between described lid and the described permanent magnet.

3, motor as claimed in claim 1, wherein radially extend in the gap between described permanent magnet and described coil.