CN1420599A - Small outer diameter flat coreless vibration motor - Google Patents
Small outer diameter flat coreless vibration motor Download PDFInfo
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- CN1420599A CN1420599A CN 02100139 CN02100139A CN1420599A CN 1420599 A CN1420599 A CN 1420599A CN 02100139 CN02100139 CN 02100139 CN 02100139 A CN02100139 A CN 02100139A CN 1420599 A CN1420599 A CN 1420599A
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- circular magnet
- rotor
- outer diameter
- vibration motor
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Abstract
The present invention pertains to small outer diameter flat coreless vibration motors, especially relating to a small outer diameter flat coreless vibration motor, which is an electronic device used inside various mobile communication terminals similar to mobile phones. A circular magnet of the present invention is disposed opposite to a brush the bracket, the coil center is consistent to the center of the outer diameter and the inner diameter of the magnet, and high-density loads are disposed at one side of the printed circuit board in the commutator. Thus the present invention improves the performance of the vibration motors, increases efficiency of mobile communication terminals using this kinds of motors, and increases user's reliability and satisfaction.
Description
The invention belongs to the core-free vibration motor of small outer diameter flat type, particularly a kind of small outer diameter flat coreless vibration motor.
The core-free vibration motor of platypelloid type is the electronic device that is used for the various mobile communication terminals inside of similar mobile phone, and it exports vibration signal according to mobile communication terminal user's needs.Along with the various mobile communication terminal miniaturizations of similar mobile phone, lightweight and ultrathin trend, the external diameter of platypelloid type vibration motor is more and more littler, but the shaking force of above-mentioned vibration motor will remain on the previous level; The external diameter of platypelloid type vibration motor reduces to cause magnet, brush and rotor also along with diminishing, and to subtract the limit little and diminish when brush is positioned at the inner external diameter of magnet; When the internal diameter of magnet, when external diameter reduces, the effective area of magnet is also just unavoidably along with reducing, and the internal diameter of magnet reduce the gradient of brush is increased, thereby the brush elasticity is increased, cause the rising of starting resistor and rated current and the minimizing of revolution.So in order to obtain good brush elasticity, the contact angle of brush and commutator will maintain enough low position, need sufficient brush external diameter, bring difficulty also for the design of outer diameter flat type vibration motor; Reduce magnet causes effective flux again inevitably for the footpath minimizing.Vibration motor structure is in the past generally followed the content of the relevant patent documentation of Korea S and Japan, and when the external diameter of this type of patent vibration motor reduced, the external diameter of rotor and magnet was also along with reducing, and the shift in position by coil and magnet is difficult to obtain bigger torque.When the center of the external diameter of hub of a spool, circular magnet and internal diameter is consistent, can obtain maximum interlock flux.The top of the central shaft of vibration motor is fixed on the groove of top end cap, and the end of its bar and the contact area of groove be minimum when causing that masterpiece is used for vibration motor outside, and the distortion and the central shaft of central shaft comes off from the groove of top end cap easily.In sum, platypelloid type vibration motor in the past has certain limit on efficient, to such an extent as to the reduction of commercial viability and economic feasibility is unavoidable, the mobile phone of this type of vibration motor and the value of other mobile communication terminal make to be installed can't be embodied to greatest extent, makes user's reliability and satisfaction also along with reduction.In order to overcome above-mentioned defective, the present invention proposes a kind of small outer diameter flat coreless vibration motor, its circular magnet is arranged on the opposite of brush carriage, effective flux of supplying with rotor is increased, and simultaneously, the external diameter of hub of a spool and magnet and the center of internal diameter are consistent, directly in the face of coil, increase the interlock flux of coil, and increase torque force, keep the stability of electric current, starting resistor and revolution.Specific brush external diameter can keep the brush elasticity, the short circuit phenomenon the during brush of prevention welding simultaneously, and set circular magnet is provided with aperture, and central shaft is connected, in case central shaft breaks away from original position when being subjected to external impact.The minimizing of the shaking force of vibration motor is directly proportional with the construction of the external diameter of vibration motor, in order to compensate above-mentioned shaking force, is provided with the high density weight in the one side of the printed circuit board (PCB) of commutator.The present invention has improved the performance of vibration motor, has improved the efficient of the mobile communication terminal that uses this kind motor, has improved user's reliability and satisfaction.
The purpose of this invention is to provide a kind of small outer diameter flat coreless vibration motor, its circular magnet is arranged on the opposite of brush carriage, effective flux of supplying with rotor is increased, simultaneously, the external diameter of hub of a spool and magnet and the center of internal diameter are consistent, directly in the face of coil, increase the interlock flux of coil, and the increase torque force, keep the stability of electric current, starting resistor and revolution; The objective of the invention is; The minimizing of the shaking force of vibration motor is directly proportional with the construction of the external diameter of vibration motor, in order to compensate above-mentioned shaking force, is provided with the high density weight in the one side of the printed circuit board (PCB) of commutator.Improve the performance of vibration motor, improved the efficient of the mobile communication terminal that uses this kind motor, improved user's reliability and satisfaction.
The objective of the invention is to be achieved through the following technical solutions: a kind of small outer diameter flat coreless vibration motor, two coils of not overlapping arrangement, install the oil-containing metal bearing on its central shaft, contact with the central shaft rotation that is fixed, vibration motor by metal bearing one side and circular magnet counterparty to the convex contact contact with the rotor rotation, produce the upper end cover that flux forms magnetic circuit with the coil of rotor, form by the carriage that connects a pair of brushgear, the upper end cover on carriage opposite is provided with circular magnet makes rotor directly relative with coil, aperture is left at the center of circular magnet, central axle sleeve is loaded among the aperture, makes that central shaft is unlikely to break away from effective track when external impact is arranged; The diameter of the aperture at circular magnet center is consistent with the internal diameter of the metal bearing of central shaft contact rotation; Increase the adhesive force of circular magnet in the bottom of circular magnet with polyvinyl resin, do not produce bubble for making it, the surface roughness of the bonded part of circular magnet should be greater than 0.7S (is 0.7S＜=surface roughness＜=1.5S) less than 1.5S; The external diameter thickness of circular magnet is less than its internal diameter thickness, make it have from inside to outside gradient, the mechanical friction that causes with the metal bearing that reduces the rotor center axle and the slit between the central shaft, the thickness of centre of rotor and external diameter is by outside the successively decreasing in center, form horn-like, to increase shaking force; Be connected with the high density weight on the printed circuit board (PCB) of the commutator of rotor bottom to increase shaking force.
Above-mentioned small outer diameter flat coreless vibration motor reduces in order to compensate because of reducing the shaking force that external diameter causes, the method of generally taking to thicken vibration motor increases the offset of rotor, but the thickening vibration motor must reduce the effective area of flux, minimizing is by the flux of rotor coil, also must cause the rising of electric current and starting resistor and the minimizing of torque, and reduce the performance of vibration motor.By the flux of rotor coil, the relational expression of torque and electric current such as formula 1:
[formula 1]
T＝kΦI
Here k is a constant, and Φ is the interlock flux by coil, and I is the electric current by coil.
When the torque that produces when rotor was constant, interlock flux phi by coil and the electric current I by coil were inversely proportional to.
The present invention is in order to address the above problem, cast magnet in the past is changed to circular magnet, increased the effective area of flux, show at the interior external diameter center one of hub of a spool and magnet increases the flux that produces torque, improves the performance of small outer diameter flat type vibration motor; In the vibration motor in the past, printed circuit board (PCB) is relative with magnet to be arranged, and magnet arrangement is on the opposite of carriage among the present invention, and the upper end cover that makes coil reduces the air gap between magnet and the coil with relative, leaks flux to reduce; The vibration motor external diameter reduces, and the external diameter of brush also along with reducing, causes that the contact angle of brush and commutator strengthens, and the brush elasticity reduces, and becomes the main cause that starting resistor and electric current rise.Among the present invention in order to ensure enough big brush external diameter with magnet arrangement on the upper end cover on the opposite of the carriage at brush place; Vibration motor in the past covers the fluting fixed center axis in upper end, miniaturization along with vibration motor, the thickness of upper end cover reduces to cause that the contact area that prevents the central shaft disengaging reduces, when external force acts on vibration motor, the central shaft easy deformation also comes off from groove, among the present invention circular magnet is arranged on the upper end cover, and open aperture perforation central shaft to obtain stable support at the center of circular magnet; Among the present invention, circular magnet is not only the means to rotor supply magnetic, also be fixed center axis the end be unlikely to be broken away from the means of effective track by external impacts; The inside of vibration motor is printed on the printed circuit board (PCB) homonymy of commutator the high density weight is installed, and is used for compensating the shaking force that reduces to cause because of the awl external diameter and reduces, and the thickness of centre of rotor and external diameter is by outside the successively decreasing in center, forms horn-like; The external diameter thickness of circular magnet is less than its internal diameter thickness, makes it have from inside to outside gradient, and the mechanical friction so that the metal bearing that reduces the rotor center axle and the slit between the central shaft cause reduces shaking force as much as possible and descends.
Be described with reference to the accompanying drawings embodiments of the invention down:
The section intention of accompanying drawing 1 vibration motor:
Accompanying drawing 2 vibration motor structural representations;
Accompanying drawing 3 vibration motor structural representations;
Accompanying drawing 4 vibration motors form trumpet type rotor schematic diagram;
In the accompanying drawing: 10 vibration motors, 11 rotors, 11a commutator, 11b printed circuit board (PCB), 12 coils, 13 metal bearings, 14 central shafts, 15 circular magnet, 15a aperture, 16 upper end covers, 17 brushes, 18 carriages, 19 polyvinyl resins, 20 high density weights.
A kind of small outer diameter flat coreless vibration motor as shown in the figure, by two coils 12 of not overlapping arrangement, install oil-containing metal bearing 13 on its central shaft 14, contact with central shaft 14 rotations that are fixed, vibration motor 10 by metal bearing 13 1 sides and circular magnet 15 counterparties to the convex contact contact with rotor 11 rotations, produce the upper end cover 16 that flux forms magnetic circuit with the coil 12 of rotor 11, form by the carriage 18 that connects a pair of brush 17 devices, the upper end cover 16 on carriage 18 opposites is provided with circular magnet 15 makes rotor 11 directly relative with coil 12, aperture 15a is left at the center of circular magnet 15, central shaft 14 is set among the aperture 15a, makes that central shaft 14 is unlikely to break away from effective track when external impact is arranged; The diameter of the aperture 15a at circular magnet 15 centers is consistent with the internal diameter of the metal bearing 13 of central shaft 14 contact rotations; Increase the adhesive force of circular magnet 15 in the bottom of circular magnet 15 with polyvinyl resin 19, do not produce bubble for making it, the surface roughness of the bonded part of circular magnet 15 should be greater than 0.7S less than 1.5S (that is 0.7S＜=surface roughness＜=1.5S); The external diameter thickness of circular magnet 15 is less than its internal diameter thickness, make it have from inside to outside gradient, the mechanical friction that causes with the metal bearing 13 that reduces rotor 11 central shafts and the slit between the central shaft 14, the center of rotor 11 and the thickness of external diameter are by outside the successively decreasing in center, form horn-like, to increase shaking force; Be connected with high density weight 20 on the printed circuit board (PCB) 11b of the commutator 11a of rotor 11 bottoms to increase shaking force.
Above-mentioned small outer diameter flat coreless vibration motor reduces in order to compensate because of reducing the shaking force that external diameter causes, the method of generally taking to thicken vibration motor increases the offset of rotor 11, but thickening vibration motor 10 must reduce the effective area of flux, minimizing is by the flux of rotor coil, also must cause the rising of electric current and starting resistor and the minimizing of torque, and reduce the performance of vibration motor.By the flux of rotor coil, the relational expression of torque and electric current such as formula 1:
[formula 1]
T＝kΦI
Here k is a constant, and Φ is the interlock flux by coil, and I is the electric current by coil.
When the torque that produces when rotor was constant, interlock flux phi by coil and the electric current I by coil were inversely proportional to.
The present invention is in order to address the above problem, cast magnet in the past is changed to circular based magnet, increased the effective area of flux, show at the interior external diameter center one of coil 12 centers and circular magnet 15 increases the flux that produces torque, improves the performance of small outer diameter flat type vibration motor; In the vibration motor in the past, printed circuit board (PCB) is relative with magnet to be arranged, and circular magnet 15 is arranged in the opposite of carriage 18 among the present invention, and the upper end cover 16 that makes coil 12 is with relative, reduces the air gap between circular magnet 15 and the coil 12, to reduce the leakage flux; The vibration motor external diameter reduces, and the external diameter of brush also along with reducing, causes that the contact angle of brush and commutator strengthens, and the brush elasticity reduces, and becomes the main cause that starting resistor and electric current rise.Among the present invention in order to ensure enough big brush external diameter with magnet arrangement on the upper end cover 16 on the opposite of the carriage 18 at brush 17 places; The fixed center axis 14 of on upper end cover 16, slotting of vibration motor in the past, miniaturization along with vibration motor 10, the thickness of upper end cover 16 reduces to cause that the contact area that prevents central shaft 14 disengagings reduces, when external force acts on vibration motor 10, central shaft 14 easy deformation also come off from groove, among the present invention circular magnet 15 is arranged on the upper end cover 16, and open aperture 15a perforation central shaft 14 to obtain stable support at the center of circular magnet 15; Among the present invention, circular magnet 15 is not only the means to rotor 11 supply fluxs, also be fixed center axis 14 the end be unlikely to be broken away from the means of effective track by external impacts; The inside of vibration motor is provided with the printed circuit board (PCB) 11b homonymy of commutator 11a high density weight 20 is installed, and is used for compensating the shaking force that reduces to cause because of rotor 11 external diameters and reduces; The center of rotor 11 and the thickness of external diameter are by outside the successively decreasing in center, form horn-like; The external diameter thickness of circular magnet 15 is less than its internal diameter thickness, makes it have from inside to outside gradient, to reduce the metal bearing 13 and the mechanical friction that the slit between the central shaft 14 causes of the central shaft 14 that rotor 11 establishes, reduces shaking force decline as much as possible.
Claims (5)
1 one kinds of small outer diameter flat coreless vibration motors, it is characterized in that: two coils of not overlapping arrangement, install the oil-containing metal bearing on its central shaft, contact with the central shaft rotation that is fixed, vibration motor by metal bearing one side and circular magnet counterparty to the convex contact contact with the rotor rotation, produce the top end cap that flux forms magnetic circuit with the coil of rotor, form by the carriage that connects a pair of brushgear, the upper end cover on carriage opposite is provided with circular magnet makes rotor directly relative with coil, aperture is left at the center of circular magnet, central axle sleeve is loaded among the aperture, makes that central shaft is unlikely to break away from effective track when external impact is arranged.
2 a kind of small outer diameter flat coreless vibration motors as claimed in claim 1 is characterized in that: the diameter of the aperture at circular magnet center is consistent with the internal diameter of the metal bearing of central shaft contact rotation.
3 a kind of small outer diameter flat coreless vibration motors as claimed in claim 1, it is characterized in that: the adhesive force that increases circular magnet in the bottom of circular magnet with polyvinyl resin, for making it not produce bubble, the surface roughness of the bonded part of circular magnet should be greater than 0.7S less than 1.5S (be 0.7S＜=surface roughness＜=16.18S).
4 a kind of small outer diameter flat coreless vibration motors as claimed in claim 1, it is characterized in that: the external diameter thickness of circular magnet is less than its internal diameter thickness, make it have from inside to outside gradient, the mechanical friction that causes with the metal bearing that reduces the rotor center axle and the slit between the central shaft, the thickness of centre of rotor and external diameter is by outside the successively decreasing in center, form horn-like, to increase shaking force.
5 as claimed in claim a kind of small outer diameter flat coreless vibration motors is characterized in that: be connected with the high density weight on the printed circuit board (PCB) of the commutator of rotor bottom to increase shaking force.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-007112 | 2001-11-15 | ||
| KR20010007112 | 2001-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1420599A true CN1420599A (en) | 2003-05-28 |
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ID=19705693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02100139 Pending CN1420599A (en) | 2001-11-15 | 2002-01-14 | Small outer diameter flat coreless vibration motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1420599A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171735B (en) * | 2005-05-09 | 2011-04-20 | 索尼计算机娱乐公司 | Vibration device |
| CN1751809B (en) * | 2004-09-24 | 2012-03-21 | 三星电机株式会社 | Multi-mode vibration generator for communication terminal |
-
2002
- 2002-01-14 CN CN 02100139 patent/CN1420599A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1751809B (en) * | 2004-09-24 | 2012-03-21 | 三星电机株式会社 | Multi-mode vibration generator for communication terminal |
| CN101171735B (en) * | 2005-05-09 | 2011-04-20 | 索尼计算机娱乐公司 | Vibration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CI01 | Correction of invention patent gazette |
Correction item: Priority number Correct: 2001-0071122 False: 10-2001-007112 Number: 22 Page: 164 Volume: 19 |
|
| CI02 | Correction of invention patent application |
Correction item: Priority number Correct: 2001-0071122 False: 10-2001-007112 Number: 22 Page: The title page Volume: 19 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: NUMBER OF PRIORITY; FROM: 10-2001-007112 TO: 2001-0071122 |
|
| ERR | Gazette correction |
Free format text: CORRECT: NUMBER OF PRIORITY; FROM: 10-2001-007112 TO: 2001-0071122 |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |