CN104333193B - Moving-magnetic type linear motor with cooling - Google Patents
Moving-magnetic type linear motor with cooling Download PDFInfo
- Publication number
- CN104333193B CN104333193B CN201410510156.4A CN201410510156A CN104333193B CN 104333193 B CN104333193 B CN 104333193B CN 201410510156 A CN201410510156 A CN 201410510156A CN 104333193 B CN104333193 B CN 104333193B
- Authority
- CN
- China
- Prior art keywords
- mover
- iron core
- groove
- coil
- electric motors
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Landscapes
- Linear Motors (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The present invention relates to a kind of moving-magnetic type linear motor with cooling, including mover, stator and shell.Wherein, mover includes yoke and is symmetrically distributed in the permanent magnet of the upper and lower both sides of yoke；Stator includes two groups of identical units, is symmetrically distributed in the both sides up and down of mover；The unit of the stator includes iron core, coil and heat abstractor；Shell is provided with opening in one end of the mover direction of motion, and one end of mover is stretched out in outside shell aperture；Motion platform is provided with outside shell aperture, one end that the motion platform is located at outside shell with mover is fixedly connected.The New Type Linear Motor is direct current generator, using moving magnet and bilateral flat-plat type scheme, motion parts do not have cable and drag chain, iron core does not have teeth groove, simple and compact for structure, fast response time, high precision, small volume, lightweight with compared with high thrust and higher motion frequency, and carry heat abstractor, good cooling results, reliability is high, extends the linear electric motors life-span.
Description
Technical field
The invention belongs to technical field of motors, and in particular to a kind of moving-magnetic type linear motor with cooling.
Background technology
Single-phase DC linear electric motors have fast response time, and high precision, small volume is lightweight, are capable of achieving high-frequency high-speed fortune
Dynamic the features such as, it is widely used in precise control system.But its thrust is smaller, the poor reliability in high frequency motion.It is more prominent
The problem for going out is, DYN dynamic single-phase DC linear electric motors temperature rise, and temperature distributing disproportionation, can cause the deformation of mover even
Burning out for motor, has a strong impact on performance and the life-span of motor.
The content of the invention
The purpose of the embodiment of the present invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of thrust is big, good heat dissipation, can
By property New Type Linear Motor high.
The technical scheme of the embodiment of the present invention is such：
Moving-magnetic type linear motor with cooling, including mover, stator and shell, the mover and stator are arranged on described outer
Inside shell；The mover includes one piece of yoke and multiple permanent magnets, and the permanent magnet is symmetrically distributed in up and down the two of the yoke
Side；The stator includes two groups of identical units, is symmetrically distributed in the both sides up and down of the mover；The unit of the stator includes
Iron core, coil and heat abstractor；Coil one side is close to the iron core, another side towards the permanent magnet, with the permanent magnetism
Air gap is left between body；The coil accesses direct current, produces magnetic field, promotes mover to be moved along a straight line；The heat abstractor
It is arranged on the iron core, it is relative with the coil；The shell is provided with opening in one end of the mover direction of motion, described
One end of mover is stretched out in outside the shell aperture；Motion platform, the motion platform are provided with outside the shell aperture
The one end being located at outside shell with the mover is fixedly connected.
Further illustrate, the motion platform includes support base, guide rail and slide unit；The guide rail is arranged on the support base
On, its bearing of trend is consistent with the mover direction of motion；The slide unit be arranged on the guide rail on, one end of the slide unit with
One end that the mover is located at outside shell is fixedly connected.
Further illustrate, the shell includes base and upper lid, and the base and upper lid are equipped with square groove, described square
The opening of groove accommodates the unit of stator described in a group, the coil, iron core and heat abstractor towards the mover, each square groove
It is sequentially located at from outside to inside in the square groove, is fixedly connected on the base is next with upper lid one.
Further illustrate, the one side of the iron core dorsad coil is provided with groove；The heat abstractor is radiating tube, institute
State radiating tube to be embedded in groove, be in close contact with the iron core；The two ends of the radiating tube are respectively the entrance of cooling medium
And outlet.
Further illustrate, the canal shape structure that the groove is parallel to each other for multiple tracks, through the opposite sides of the iron core；Institute
The opening direction and the direction of motion of the mover for stating groove are mutually perpendicular to；The radiating tube is penetrated from one end of the groove,
The other end is passed, and is distributed on the iron core in the waveform for bending back and forth.
Further illustrate, the groove is the corrugated canal shape structure for bending back and forth, and its two ends is through the iron core
Side forms two openings；The radiating tube is penetrated from an opening of groove, and another opening passes, its shape and groove phase
Agree with.
Further illustrate, the number of the coil and permanent magnet, size and location are corresponding.
Further illustrate, insulating barrier is provided between the iron core and coil, the insulating barrier is the good insulation material of heat conduction
Material.
Further illustrate, the iron core is the rectangular structure being formed by stacking by silicon steel sheet.
Further illustrate, the permanent magnet positioned at described yoke phase the same side is N poles and the arrangement of S poles alternate intervals；The magnetic
The magnetic pole of the permanent magnet of yoke opposite sides is opposite.
The beneficial effect that New Type Linear Motor provided by the present invention brings is：The linear electric motors are direct current generator, are had
The characteristics of fast response time and high precision, it is capable of achieving high-frequency high-speed motion；It uses moving magnet structure, and motion parts do not have cable
And drag chain, simple structure, lighter in weight, larger acceleration can be obtained；Stator is reacted on comprising two groups of same units one
The bilateral flat-plat type scheme of mover substantially increases the thrust and motion frequency of linear electric motors；Iron core does not have teeth groove so that straight line
Motor is exerted oneself steady without fluctuation；Two groups of units of stator are respectively an entirety with base and upper lid embedding by epoxy resin,
Improve the reliability of linear electric motors；Heat abstractor is circulated by cooling medium, takes away the heat of linear electric motors, it is ensured that
The stabilization of motor performance, extends the life-span of motor.
Brief description of the drawings
Fig. 1 is the structural representation of mover in the embodiment of the present invention；
Fig. 2 is one group of structural representation of unit of stator in the embodiment of the present invention；
Fig. 3 is the scheme of installation of iron core, heat abstractor and base in the embodiment of the present invention；
Fig. 4 is the scheme of installation of base, one group of unit of stator and mover in the embodiment of the present invention；
Fig. 5 is the structural representation of the moving-magnetic type linear motor with cooling provided by the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The embodiment of the present invention provides a kind of moving-magnetic type linear motor of band cooling, including mover, stator and shell, mover with
Stator is set inside the housing, and is short stator, the structure of mover long.
As shown in figure 1, mover includes yoke 1 and multiple permanent magnets 2, permanent magnet 2 is symmetrically distributed in up and down the two of yoke 1
Side.Specifically, the permanent magnet 2 positioned at the phase the same side of yoke 1 is N poles and the arrangement of S poles alternate intervals；The opposite sides of yoke 1
The magnetic pole of permanent magnet 2 is opposite.
In the present embodiment, it is parallel to each other between two adjacent permanent magnets 2, the long side direction side of moving of permanent magnet 2
To being mutually perpendicular to.Permanent magnet 2 is bonded in yoke 1 by super glue.
In the present embodiment, yoke is the good material of magnetic property, such as DT4E, No. 10 steel, A3 steel etc..
In the present embodiment, the material of permanent magnet is neodymium iron boron, it is also possible to substituted with permanent-magnet materials such as SmCo, ferrites.
Compared with traditional moving-coil structure, the linear electric motors that the present embodiment is provided are moving magnet structure, motion parts
There is no cable and drag chain, simple structure, compact, lighter in weight can obtain larger acceleration.
In the present embodiment, shell is provided with opening in one end of the mover direction of motion, and one end of mover stretches out in shell and opens
Outside mouthful.Motion platform (not shown) is provided with outside shell aperture, the motion platform is located at the one end outside shell with mover
It is fixedly connected.
Specifically, the motion platform includes support base, guide rail and slide unit.Its middle guide is arranged on support base, and it prolongs
It is consistent with the direction that mover is moved to stretch direction；Slide unit is arranged on guide rail, and one end of slide unit is located at outside shell with mover
End is fixedly connected.Under the driving of mover, slide unit can be for linear motion along guide rail.
As shown in Fig. 2 stator includes two groups of identical units, the both sides up and down of mover are symmetrically distributed in.Every group of unit is all
Including iron core 3, coil 4 and heat abstractor 5.In the bilateral flat-plat type scheme, two groups of units one of stator react on mover,
Compared to unilateral flat plate type linear motor, with bigger thrust and motion frequency.
Specifically, the one side of coil 4 is close to iron core 3, and another side leaves air gap towards permanent magnet 2 between permanent magnet；Line
Circle 4 accesses direct current, produces magnetic field, promotes mover to be moved along a straight line；Heat abstractor 5 is arranged on iron core 3, with the phase of coil 4
It is right.
In the present embodiment, the one side of the dorsad coil 4 of iron core 3 is provided with groove.Heat abstractor 5 is radiating tube, the radiating tube
It is embedded in groove, is in close contact with iron core 3.The two ends of radiating tube are respectively the entrance and exit of cooling medium.
In the present embodiment, the canal shape structure that groove is parallel to each other for multiple tracks, it is through the opposite sides of iron core 3 and recessed
The opening direction of groove is mutually perpendicular to the direction of motion of mover.Radiating tube is penetrated from one end of groove, and the other end is passed, in back and forth
The waveform of bending is distributed on iron core 3.Corrugated radiating tube is larger with the contact area of iron core, it is ensured that heat transfer is good, plus
Strong cooling effect, while so that motor volume is compact and pushing force density is big.
As an alternative, groove can also be the corrugated canal shape structure for bending back and forth.Iron is run through at the two ends of groove
The side of core 3 forms two openings, and radiating tube is penetrated from an opening of groove, and another opening passes.Wherein, radiating tube
Shape is mutually agreed with groove..
In the present embodiment, cooling medium is water or oil；Radiating tube is copper pipe, it is also possible to the good metal of other heat conduction
Tubes of material is substituted.
When linear electric motors work, radiating tube is docked with cooling water pipeline, cooling water is flowed into from radiating tube inlet, from radiating
Pipe outlet outflow, takes away the heat that linear electric motors are passed over by radiating tube.The continuous iterative cycles flowing of cooling water, to straight line
Motor is effectively radiated.Compared with prior art, the linear electric motors that the present embodiment is provided can bear bigger electric current, enter
And obtain bigger thrust.
In the present embodiment, coil 4 is entwined by copper cash, and multiple coils 4 connect into a rectangle circle cake side by side.
Certainly, coil 4 can also use other wire producings, such as aluminum steel, copper-clad aluminum conductor, gold thread etc..
In the present embodiment, the number of coil 4 and permanent magnet 2, size and location are corresponding.Wherein, respectively positioned at yoke 1
The size of the permanent magnet at two ends can be designed to it is smaller than other permanent magnets, so can with material-saving cost, while mitigate mover
Overall weight, improves motion frequency.
In the present embodiment, insulating barrier is provided between iron core 3 and coil 4, the insulating barrier is the good insulating materials of heat conduction,
Ensure that linear electric motors insulation is good, improve reliability.
In the present embodiment, iron core 3 is the rectangular structure being formed by stacking by silicon steel sheet.It is of course also possible to be led with other
The good material substitution silicon steel sheet of magnetic property.Iron core 3 is prevented effectively from the generation of reluctance force without the conventional teeth groove of linear electric motors,
So that linear electric motors are exerted oneself steadily without fluctuation.
As shown in Figures 3 to 5, shell includes base 6 and upper lid 7.Wherein, base 6 and upper lid 7 are equipped with square groove, side
Towards mover, each square groove accommodates one group of unit of stator for the opening of shape groove, coil 4, iron core 3 and heat abstractor 5 from outward to
Inside it is sequentially located in square groove.It is fixedly connected on base 6 is next with upper lid 7 one.
In the present embodiment, every group of unit of stator is respectively one whole with base 6 and the embedding of upper lid 7 by epoxy resin
Body, improves the reliability of linear electric motors.
In the present embodiment, the material of base 6 and upper lid 7 is stainless steel or aluminium alloy, it is also possible to good with other intensity
Material processing.
In the present embodiment, the side relative with shell aperture is provided with fan, is filled by air-cooled mode auxiliary heat dissipation
5 are put, the heat-sinking capability of linear electric motors is improved.
The linear electric motors that the present embodiment is provided are direct current generator, with fast response time and the characteristics of high precision, can be real
Existing high-frequency high-speed motion.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1., with the moving-magnetic type linear motor of cooling, including mover, stator and shell, the mover and stator are arranged on the shell
It is internal, it is characterised in that：The mover includes one piece of yoke and multiple permanent magnets, and the permanent magnet is symmetrically distributed in the yoke
Both sides up and down；The stator includes two groups of identical units, is symmetrically distributed in the both sides up and down of the mover；The stator
Unit includes iron core, coil and heat abstractor；The coil is that it is simultaneously close to institute by the circle cake of wire winding, encapsulation
Iron core is stated, another side leaves air gap towards between the permanent magnet, with the permanent magnet；The coil accesses direct current, produces
Magnetic field, promotes mover to be moved along a straight line；The one side that the iron core is close to the coil does not have teeth groove, i.e., both are mutually close to
It is simultaneously even curface；The heat abstractor is arranged on the iron core, and the opposite side relative with the coil；It is described outer
Shell is provided with opening in one end of the mover direction of motion, and one end of the mover is stretched out in outside the shell aperture；It is described
Motion platform is provided with outside shell aperture, one end that the motion platform is located at outside shell with the mover is fixedly connected.
2. linear electric motors according to claim 1, it is characterised in that：The motion platform includes support base, guide rail and cunning
Platform；The guide rail is arranged on the support base, and its bearing of trend is consistent with the mover direction of motion；The slide unit is arranged on
On the guide rail, the one end outside one end of the slide unit is located at shell with the mover is fixedly connected.
3. linear electric motors according to claim 1, it is characterised in that：The shell includes base and upper lid, the base
Square groove is equipped with upper lid, towards the mover, each square groove accommodates stator described in a group for the opening of the square groove
Unit, the coil, iron core and heat abstractor are sequentially located in the square groove from outside to inside, and the base and upper lid one are next
On be fixedly connected.
4. linear electric motors according to claim 1, it is characterised in that：The one side of the iron core dorsad coil is provided with recessed
Groove；The heat abstractor is radiating tube, and the radiating tube is embedded in groove, is in close contact with the iron core；The radiating tube
Two ends be respectively the entrance and exit of cooling medium.
5. linear electric motors according to claim 4, it is characterised in that：The canal shape knot that the groove is parallel to each other for multiple tracks
Structure, through the opposite sides of the iron core；The opening direction of the groove is mutually perpendicular to the direction of motion of the mover；It is described
Radiating tube is penetrated from one end of the groove, and the other end is passed, and is distributed on the iron core in the waveform for bending back and forth.
6. linear electric motors according to claim 4, it is characterised in that：The groove is the corrugated canal shape for bending back and forth
Structure, its two ends form two openings through the side of the iron core；The radiating tube is penetrated from an opening of groove, another
Individual opening is passed, and its shape is mutually agreed with groove.
7. linear electric motors according to claim 1, it is characterised in that：The number of the coil and permanent magnet, size and position
Put corresponding.
8. linear electric motors according to claim 1, it is characterised in that：Insulating barrier, institute are provided between the iron core and coil
It is the good insulating materials of heat conduction to state insulating barrier.
9. linear electric motors according to claim 1, it is characterised in that：The iron core be by silicon steel sheet be formed by stacking it is rectangular
Body structure.
10. linear electric motors according to claim 1, it is characterised in that：Permanent magnet positioned at described yoke phase the same side is N
Pole and the arrangement of S poles alternate intervals；The magnetic pole of the permanent magnet of the yoke opposite sides is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510156.4A CN104333193B (en) | 2014-09-28 | 2014-09-28 | Moving-magnetic type linear motor with cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510156.4A CN104333193B (en) | 2014-09-28 | 2014-09-28 | Moving-magnetic type linear motor with cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104333193A CN104333193A (en) | 2015-02-04 |
| CN104333193B true CN104333193B (en) | 2017-07-07 |
Family
ID=52407866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410510156.4A Active CN104333193B (en) | 2014-09-28 | 2014-09-28 | Moving-magnetic type linear motor with cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104333193B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533057A (en) * | 2016-12-23 | 2017-03-22 | 大族激光科技产业集团股份有限公司 | Linear motor and cooling device thereof |
| DE102017131324A1 (en) | 2017-12-27 | 2019-06-27 | Beckhoff Automation Gmbh | Stator module and planar drive system |
| CN110061582A (en) * | 2019-06-04 | 2019-07-26 | 恩普齐斯智能装备(苏州)有限公司 | A kind of structure and its cooling means that linear motor is quickly cooled down |
| CN110247498B (en) * | 2019-07-03 | 2020-12-04 | 珠海格力电器股份有限公司 | Cooling assembly of linear motor rotor, linear motor and machine tool |
| CN213072404U (en) * | 2020-09-04 | 2021-04-27 | 瑞声科技（南京）有限公司 | Linear motor |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000333438A (en) * | 1999-05-19 | 2000-11-30 | Mirae Corp | Linear motor |
| JP2001103726A (en) * | 1999-09-30 | 2001-04-13 | Toyoda Mach Works Ltd | Cooling device of electromagnetic coil in linear motor |
| JP2001128438A (en) * | 1999-10-28 | 2001-05-11 | Sodick Co Ltd | Linear motor and manufacturing method therefor |
| JP2002027730A (en) * | 2001-04-09 | 2002-01-25 | Yaskawa Electric Corp | Canned linear motor and armature thereof |
| JP2004040874A (en) * | 2002-07-01 | 2004-02-05 | Nikon Corp | Linear motor, stage arrangement, and aligner |
| CN1933304A (en) * | 2006-09-28 | 2007-03-21 | 哈尔滨工业大学 | Horizontal flux flat-plate type permanent-magnetic linear electric machine |
| JP2008035698A (en) * | 2000-09-29 | 2008-02-14 | Sanyo Denki Co Ltd | Armature for linear motor |
| JP2008061458A (en) * | 2006-09-01 | 2008-03-13 | Fuji Mach Mfg Co Ltd | Cylindrical linear motor |
| KR20080044574A (en) * | 2006-11-16 | 2008-05-21 | 두산인프라코어 주식회사 | A cooling device for linear motor |
| CN101888164A (en) * | 2010-07-26 | 2010-11-17 | 东南大学 | Low-speed high-thrust single-air gap magnetic gear composite linear electric motor |
-
2014
- 2014-09-28 CN CN201410510156.4A patent/CN104333193B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000333438A (en) * | 1999-05-19 | 2000-11-30 | Mirae Corp | Linear motor |
| JP2001103726A (en) * | 1999-09-30 | 2001-04-13 | Toyoda Mach Works Ltd | Cooling device of electromagnetic coil in linear motor |
| JP2001128438A (en) * | 1999-10-28 | 2001-05-11 | Sodick Co Ltd | Linear motor and manufacturing method therefor |
| JP2008035698A (en) * | 2000-09-29 | 2008-02-14 | Sanyo Denki Co Ltd | Armature for linear motor |
| JP2002027730A (en) * | 2001-04-09 | 2002-01-25 | Yaskawa Electric Corp | Canned linear motor and armature thereof |
| JP2004040874A (en) * | 2002-07-01 | 2004-02-05 | Nikon Corp | Linear motor, stage arrangement, and aligner |
| JP2008061458A (en) * | 2006-09-01 | 2008-03-13 | Fuji Mach Mfg Co Ltd | Cylindrical linear motor |
| CN1933304A (en) * | 2006-09-28 | 2007-03-21 | 哈尔滨工业大学 | Horizontal flux flat-plate type permanent-magnetic linear electric machine |
| KR20080044574A (en) * | 2006-11-16 | 2008-05-21 | 두산인프라코어 주식회사 | A cooling device for linear motor |
| CN101888164A (en) * | 2010-07-26 | 2010-11-17 | 东南大学 | Low-speed high-thrust single-air gap magnetic gear composite linear electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104333193A (en) | 2015-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104333193B (en) | Moving-magnetic type linear motor with cooling | |
| US10491069B2 (en) | Electric motor with laminated sheet windings | |
| US7750515B1 (en) | Industrial air core motor-generator | |
| CN104967276A (en) | Liquid-cooling iron-coreless permanent-magnet linear motor | |
| CN108418388A (en) | Synthesize winding non iron-core linear permanent magnet synchronous motor | |
| JP2009545939A (en) | Linear motor with force pulsation compensation | |
| US9960647B2 (en) | Enhanced flux-density magnet | |
| CN204794640U (en) | Linear motor | |
| CN107347242A (en) | A kind of heat abstractor and communication equipment | |
| CN107681868B (en) | Efficient high starting torque desk permanent-magnet eddy-current coupling | |
| US20200350800A1 (en) | System and method for cooling an electric machine | |
| Chulaee et al. | Torque and power capabilities of coreless axial flux machines with surface PMs and halbach array rotors | |
| CN107947526B (en) | High-efficiency axial flux permanent magnet eddy current coupler with slit groove structure | |
| CN102611276B (en) | High-temperature liquid metal magnetic force driving pump | |
| CN108574391A (en) | Linear motor | |
| CN103532346A (en) | Air-gap armature motor | |
| RU2570834C1 (en) | Stator magnetic circuit for electromechanical energy converters with blast cooling (versions) and method of its manufacturing | |
| CN212162946U (en) | Linear motor and transportation system | |
| JPWO2018216304A1 (en) | Rotating electric machine | |
| CN107124086A (en) | Mixed winding linear electromagnetic brake | |
| CN208158267U (en) | The mover coil component of linear motor | |
| CN209659088U (en) | One kind being directed to coreless permanent magnet linear motor air cooling structure | |
| KR101464646B1 (en) | Eddy-current braking system with thermoelectric generator | |
| US7687960B2 (en) | Pigtailed stator windings for electrical generator | |
| Aziz | Small and high-temperature electrical machine for vehicle applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 518055 Shenzhen Province, Nanshan District high tech park, North West New Road, No. 9 Applicant after: HANS LASER TECHNOLOGY INDUSTRY GROUP CO., LTD. Applicant after: Shenzhen Hans Electric Motor Co., Ltd. Address before: 518055 Shenzhen Province, Nanshan District high tech park, North West New Road, No. 9 Applicant before: Dazu Laser Sci. & Tech. Co., Ltd., Shenzhen Applicant before: Shenzhen Hans Electric Motor Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: DAZU LASER SCI. + TECH. CO., LTD., SHENZHEN TO: HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |