CN103929915B - Waterproof metal outer shell of electronic product and manufacturing method thereof - Google Patents
Waterproof metal outer shell of electronic product and manufacturing method thereof Download PDFInfo
- Publication number
- CN103929915B CN103929915B CN201410132407.XA CN201410132407A CN103929915B CN 103929915 B CN103929915 B CN 103929915B CN 201410132407 A CN201410132407 A CN 201410132407A CN 103929915 B CN103929915 B CN 103929915B
- Authority
- CN
- China
- Prior art keywords
- waterproof
- silica gel
- sealing boss
- metal
- metal shell
- 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
Abstract
The invention discloses a waterproof metal outer shell of an electronic product and a manufacturing method of the waterproof metal outer shell. According to the manufacturing method, a metal shell provided with a protrusive waterproof rib on the inner surface is formed, and the positions, spaced by a preset distance, on the two sides of the waterproof rib respectively protrude upwards to form a sealant boss; a mold is directly pressed on the sealant bosses, so that the sealant bosses deform, at least a part of each sealant boss is pressed in a containing groove, then a closed cavity is formed by the mold and the metal shell through the sealant bosses, then silica gel is injected to the cavity, the mold is opened after the silica gel is heated and vulcanized, a waterproof silica gel part integrated with the metal shell is formed on the waterproof rib, and the side surface or the top of the waterproof silica gel part is provided with a protrusive part. According to the waterproof metal outer shell, due to the design of the sealant bosses, when the waterproof metal outer shell is manufactured, silica gel overflowing and scratches on the surface of the metal product are not prone to occurring in the injection molding process, and compression or damage to the mold is also avoided.
Description
Technical field
The present invention relates to electronic product casing, the metal waterproof case of more particularly, to a kind of electronic product and its manufacturer
Method.
Background technology
Increasing 3c product (computer (computer), communication (communication) and consumer electronics product
(consumerelectronics) triplicity, also known as " information household appliances "), particularly smart mobile phone product, require have anti-
Water dust reduction capability.
Traditional waterproof type is installing silica gel ring in plastic shell, after assembling by assembly parts, reaches water-proof function,
The classification of waterproof of this kind of mode is limited, typically in ipx5, and dismantles and ressembles rear water resistance and easily change, typically
For dismantling in structure that is less or not dismantling.
A kind of now popular way is to be integrally formed mode, plastic parts and silicon using in plastic cement liquid feeding state Silicon moulds
Glue is directly formed to an entirety, realizes waterproof by the elastic conjunction with component, and classification of waterproof is higher, achievable ipx7
Waterproof effect more than level, and can again dismantle assembling, do not affect water resistance.But adopt this kind of mode, the design of mould, system
Make that required precision is higher, have certain technical difficulty；On the other hand, the aestheticly tired to plastic parts with people, to 3c product
It is also proposed that the requirement of higher and higher outward appearance, structure and performance.So, it is used metalwork also to get over as the product of surface structure part
Come more, and existing by plastic parts and silica gel injection mo(u)lding be an entirety to reach the mould-injection process of waterproof effect,
The waterproof construction not being suitable for metalwork makes, and can produce in mould and weigh wounded, damages product, mould, in addition, easily overflowing in injection
Glue.
Content of the invention
One of purpose of the present invention is to provide a kind of metal waterproof case of electronic product, to solve metal waterproof
Shell, in manufacturing process, weighs, using in excessive glue during in-mould injection moulding process and mould, the technology leading to mould, damaged products wounded
Problem.
The technical scheme that the present invention provides is as follows:
A kind of metal waterproof case of electronic product, including metal shell and silica gel waterproof portion, described metal shell includes
Protrude from the waterproof position of bone of inner surface, described metal shell inner surface position spaced a predetermined distance in the both sides of the described waterproof position of bone
Put the formation sealing boss that raises up respectively, the inner surface concave shape of the described metal shell of at least side of described sealing boss
Become containing groove；Described silica gel waterproof portion is taken shape on the described waterproof position of bone by in-mould injection；The side in described silica gel waterproof portion
Surface or top have protuberance, to realize the elastic conjunction with described electronic product assembly parts.Based on sealing boss so that in film
During interior shaping forms silica gel waterproof portion, during matched moulds, mould is contacted with sealing boss first, sealing boss compressive deformation, rises
Effect to sealing die cavity, it is to avoid excessive glue, meanwhile, because mould directly applies pressure to sealing boss, and containing groove can be
Sealing boss provides deformation space, and sealing boss at least partly can enter containing groove after being squeezed, so can subtract further
Pressure transmission suffered by little sealing boss is to metal shell, so the pressure being applied on metal shell mitigates significantly, Neng Gouyou
Effect avoids the mould causing because pressure is larger between mould and metal shell and/or metal shell to damage.
Preferably, the material of described metal shell is that metallic aluminium, magnesium metal, metallic copper, aluminium alloy, magnesium alloy or copper close
Gold.
Preferably, the width of described sealing boss is 0.05～1mm, is highly 0.05～0.2mm, described containing groove
Width 0.05～1mm, depth are 0.05～0.2mm.
Preferably, the volume of described containing groove is more than or equal to the volume of described sealing boss.The volume of containing groove
More than or equal to the volume of sealing boss, it is partly all can to enter into containing groove in order to what sealing boss was deformed
In.
Preferably, the material in described silica gel waterproof portion is two-part liquid silica gel.
Preferably, the material in described silica gel waterproof portion is self-adhering-type liquid-state silicon gel.
Preferably, at least side angle of falling c of described sealing boss or fillet.
Preferably, the c angle of described sealing boss or fillet are located at the side away from containing groove for the described sealing boss.It is based on
It is somebody's turn to do the angle of falling c or fillet, sealing boss is easier the opposite side deformation to chamfering when being squeezed, thus crushed element more holds
Easily enter in containing groove, the stress of metal shell can be reduced while die cavity seals further.
The metal waterproof case that the present invention provides, because the design of shell inner surface sealing boss is so that in manufacturing process
In, do not result in mould and weigh wounded, be not in excessive glue, and the outward appearance of this kind of metal waterproof case, feel and heat dispersion all than
Plastic shell is more preferably.
Further object is that providing a kind of method manufacturing aforementioned electronic resultant metal waterproof case, to solve
The certainly existing Shooting Technique manufacturing metalwork waterproof part can cause product surface to weigh the problem with silica gel excessive glue wounded.
The manufacture method that the present invention provides includes:
S1, formation metal shell: described metal shell includes the waterproof position of bone protruding from inner surface, described metal shell
Inner surface raises up formation sealing boss respectively in the both sides of described waterproof position of bone position spaced a predetermined distance, described sealing
The inner surface depression of the described metal shell of at least side of boss forms containing groove；
S2, in-mould injection shaping: during matched moulds, mould is pressed on described sealing boss so that described sealing boss occurs
At least a portion of deformation and sealing boss is pressed in described containing groove, so that mould passes through institute with described metal shell
State sealing boss and form near closed hollow ring, then to described cavity injection silica gel, mold after heating sulfuration, the waterproof position of bone is formed with
The silica gel waterproof portion of described metal shell one, and the side surface in described silica gel waterproof portion or top have protuberance.
Preferably, processed by punching press or cnc in described step s1 or die casting mode forms described metal shell.
The method of the manufacture aforementioned metal waterproof case that the present invention provides, when making metal shell, makes in metal shell
Surface is protruded and is formed sealing boss, and when carrying out injection mo(u)lding to form silica gel waterproof portion, mould directly applies pressure to sealing boss
And non-metal shell, on the one hand, because sealing boss can be deformed by mould extruding, therefore form the die cavity of sealing, inject silica gel
Shi Buhui excessive glue；On the other hand, after being squeezed for sealing boss offer deformation space, sealing boss due to containing groove extremely
Small part can enter containing groove, so can reduce the suffered pressure transmission of sealing boss further to metal shell, because
This pressure being applied on metal shell mitigates significantly, thus avoid causing because pressure is larger between mould and metal shell
Mould and/or shell damage.
Brief description
Fig. 1 is a kind of structural representation of mobile phone metal waterproof case provided in an embodiment of the present invention；
Fig. 2 is the metal waterproof case of Fig. 1 along the sectional view of a-a ' line and partial enlarged drawing；
Fig. 3 is that the matched moulds in the silica gel waterproof portion in injection mo(u)lding Fig. 1 starts schematic diagram；
Fig. 4 is sealing boss compressive deformation schematic diagram during the matched moulds in silica gel waterproof portion in injection mo(u)lding Fig. 1；
Fig. 5 is the schematic diagram after injection silica gel after matched moulds in Fig. 4；
Fig. 6 is the schematic diagram with mobile phone assembly parts elastic conjunction for the metal waterproof case of Fig. 1.
Specific embodiment
Below against accompanying drawing and with reference to preferred embodiment the invention will be further described.
The specific embodiment of the present invention provides a kind of metal waterproof case of mobile phone as shown in Figure 1, and it includes metal
Housing 10 and silica gel waterproof portion 20.As shown in Fig. 2 described metal shell 10 includes the waterproof position of bone 11 protruding from its inner surface,
In the both sides of the described waterproof position of bone 11, position spaced a predetermined distance raises up and is formed described metal shell 10 inner surface respectively
Sealing boss 30, the inner surface depression of the described metal shell 10 of at least side of described sealing boss 30 forms containing groove
40；Described silica gel waterproof portion 20 is taken shape on the described waterproof position of bone 11 by in-mould injection, and the side in described silica gel waterproof portion 20
Surface has protuberance, as shown in fig. 6, to realize the elastic conjunction with mobile phone assembly parts 200, wherein said protuberance can also basis
Assembling needs, and is the top in described silica gel waterproof portion 20, and is not limited in side surface.As shown in Fig. 3 is to 5, based on described
Sealing boss 30, when silica gel waterproof portion 20 described in injection mo(u)lding, mould 100 directly presses on described sealing boss 30, and not
Directly apply pressure to described metal shell 10.
Make metal waterproof case as shown in Figure 1, first: (cnc cost is relatively by way of cnc, die casting or punching press
Height, preferably after both) formed metal shell 10, and this metal shell 10 inner surface (i.e. with mobile phone assembly parts assembling after the completion of, no
The visible side) convex to form the waterproof position of bone 11, it is spaced the position convex-shaped respectively of pre- spacing in the both sides of the waterproof position of bone 11
Become sealing boss 30 it is preferable that being to form this sealing boss 30 beyond the edge in silica gel waterproof portion to be formed, meanwhile,
The one side of sealing boss 30 or both sides, metal shell 10 inner surface depression forms containing groove 40, sees Fig. 2；
Secondly, carry out in-mould injection and form described silica gel waterproof portion 20: as shown in figure 3, mould 100 directly press on described
On sealing boss 30；Complete as shown in figure 4, mould 100 extrudes described sealing boss 30 to deformation during matched moulds, and squeezed buckling
Being partially in described containing groove 40 of shape, now passes through sealing boss 30 and forms envelope between mould 100 and metal shell 10
The die cavity closing, then toward cavity injection liquid-state silicon gel, gel coated is in the outside of the waterproof position of bone 11.It is less prone to excessive in the process
Glue, and mould 100 directly presses is sealing boss 30, it is to avoid lead to because of larger pressure between mould and metal shell
Weigh wounded in mould, mould and/or metal shell damage, and see Fig. 5.After silica gel after sulfidization molding in die cavity, die sinking ejection, obtain final product
To silica gel waterproof portion 20 as shown in Figure 2, the side surface in this silica gel waterproof portion 20 or top (are specifically made according to different assemblings
Make) there is protuberance, described metal waterproof case is made when assembling with mobile phone assembly parts by this protuberance, realizes as shown in Figure 6
Elastic conjunction, reach and effectively prevent the water etc. in the external world from entering interior of mobile phone.
Wherein metal shell 10 can be selected for flexible metal, for example metallic aluminium, magnesium metal, metallic copper, aluminium alloy, magnesium alloy or
Copper alloy etc., the material in silica gel waterproof portion 20 can be selected for two-part liquid silica gel, it is preferred to use self-adhering-type liquid-state silicon gel.
In actual fabrication, can as needed, by sealing boss 30 be designed as wide 0.05～1mm, high by 0.05～
0.2mm, and containing groove 40 is designed as wide 0.05～1mm, deep 0.05～0.2mm, and the volume of preferably containing groove is not little
Volume in sealing boss.Note: the width on section that " wide " described herein refers in Fig. 2.Separately, sealing boss 30
Unilateral or both sides can be with chamfering, the angle of falling c or fillet, and chamfering is located at the side away from containing groove on sealing boss, based on this
The angle of falling c or fillet, sealing boss is easier the opposite side deformation to chamfering when being squeezed, thus crushed element is more prone to
Enter in containing groove, the stress of metal shell can be reduced while die cavity seals further.
The mobile phone metal waterproof case that the specific embodiment of the invention provides, due to the design of shell inner surface sealing boss,
So that in manufacturing process, do not easily cause product and weigh wounded and excessive glue, and the outward appearance of this kind of metal waterproof case, feel and thermal diffusivity
Can all than plastic shell more preferably.
Above content is to further describe it is impossible to assert with reference to specific preferred embodiment is made for the present invention
Being embodied as of the present invention is confined to these explanations.For those skilled in the art, do not taking off
On the premise of present inventive concept, some equivalent substitutes or obvious modification can also be made, and performance or purposes are identical, all answer
When being considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of electronic product metal waterproof case it is characterised in that: include metal shell and silica gel waterproof portion, described metal
Housing includes the waterproof position of bone protruding from inner surface, and described metal shell inner surface is predetermined at the both sides of described waterproof position of bone interval
The position of distance raises up respectively and forms sealing boss, the interior table of the described metal shell of at least side of described sealing boss
Face depression forms containing groove；Described silica gel waterproof portion is taken shape on the described waterproof position of bone by in-mould injection；Described silica gel is prevented
The side surface in water portion or top have protuberance, to realize the elastic conjunction with described electronic product assembly parts.
2. metal waterproof case as claimed in claim 1 it is characterised in that: the material of described metal shell be metallic aluminium, gold
Belong to magnesium, metallic copper, aluminium alloy, magnesium alloy or copper alloy.
3. metal waterproof case as claimed in claim 2 it is characterised in that: the width of described sealing boss be 0.05～1mm,
It is highly 0.05～0.2mm, the width 0.05～1mm of described containing groove, depth are 0.05～0.2mm.
4. metal waterproof case as claimed in claim 3 it is characterised in that: the volume of described containing groove be more than or equal to institute
State the volume of sealing boss.
5. metal waterproof case as claimed in claim 1 it is characterised in that: the material in described silica gel waterproof portion be bi-component liquid
State silica gel.
6. metal waterproof case as claimed in claim 5, rises and is characterised by: the material in described silica gel waterproof portion is self-adhering-type liquid
State silica gel.
7. metal waterproof case as claimed in claim 1 it is characterised in that: at least side angle of falling c of described sealing boss or
Fillet.
8. metal waterproof case as claimed in claim 7 it is characterised in that: the c angle of described sealing boss or fillet are located at institute
State the side away from containing groove for the sealing boss.
9. the manufacture method of the electronic product metal waterproof case as described in a kind of any one as claim 1 to 8, its feature exists
In comprising the following steps:
S1, formation metal shell: described metal shell includes the waterproof position of bone protruding from inner surface, described metal shell inner surface
Raise up respectively in the both sides of described waterproof position of bone position spaced a predetermined distance and form sealing boss, described sealing boss
The inner surface depression of at least described metal shell of side forms containing groove；
S2, in-mould injection shaping: during matched moulds, mould is directly pressed on described sealing boss so that described sealing boss is sent out
At least a portion of raw deformation and sealing boss is pressed in described containing groove, so that mould is passed through with described metal shell
Described sealing boss forms near closed hollow ring, then to described cavity injection silica gel, molds, formed on the waterproof position of bone after heating sulfuration
With the silica gel waterproof portion of described metal shell one, and the side surface in described silica gel waterproof portion or top have protuberance.
10. manufacture method as claimed in claim 9 it is characterised in that: in described step s1 pass through punching press or cnc processing or press
Casting mode forms described metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132407.XA CN103929915B (en) | 2014-04-02 | 2014-04-02 | Waterproof metal outer shell of electronic product and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132407.XA CN103929915B (en) | 2014-04-02 | 2014-04-02 | Waterproof metal outer shell of electronic product and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103929915A CN103929915A (en) | 2014-07-16 |
| CN103929915B true CN103929915B (en) | 2017-01-18 |
Family
ID=51147938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410132407.XA Active CN103929915B (en) | 2014-04-02 | 2014-04-02 | Waterproof metal outer shell of electronic product and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103929915B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484584A (en) * | 2016-01-28 | 2016-04-13 | 恩坦华汽车零部件（镇江）有限公司 | Waterproof mechanism for automobile side door lock |
| CN105643214B (en) * | 2016-03-25 | 2017-08-29 | 广东欧珀移动通信有限公司 | The processing method of the rear case component of mobile terminal |
| CN105965777A (en) * | 2016-05-16 | 2016-09-28 | 宁波瑞元模塑有限公司 | Overflowing preventing mechanism of PU mold |
| WO2018016261A1 (en) * | 2016-07-19 | 2018-01-25 | 日立オートモティブシステムズ株式会社 | Electronic control apparatus and method for assembling electronic control apparatus |
| CN107139386A (en) * | 2017-03-23 | 2017-09-08 | 捷开通讯(深圳)有限公司 | The housing and its equipment and preparation method of a kind of achievable high leakproofness |
| CN107498886B (en) * | 2017-07-31 | 2024-03-26 | 东莞市那宏五金科技有限公司 | Silica gel and metal combined treatment process |
| CN107896267A (en) * | 2017-12-22 | 2018-04-10 | 东莞市辰荣硅胶电子有限公司 | A kind of mobile phone silica gel waterproof sleeve |
| CN111271452A (en) * | 2018-12-05 | 2020-06-12 | 众鼎瑞展电子科技(深圳)有限公司 | Waterproof sealing ring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05245942A (en) * | 1992-03-09 | 1993-09-24 | Fujikura Rubber Ltd | Rubber-resin combined product and production of the same |
| JPH07336950A (en) * | 1994-06-14 | 1995-12-22 | Shibaura Eng Works Co Ltd | Mold electric motor |
| CN201490450U (en) * | 2009-08-26 | 2010-05-26 | 合兴集团汽车电子有限公司 | Control system connector of automobile engine |
| KR100992638B1 (en) * | 2010-02-05 | 2010-11-05 | 마주영 | Two step in-mold of injection mold |
| CN102529028A (en) * | 2010-12-30 | 2012-07-04 | 先锋材料科技股份有限公司 | Mold assembly |
| CN102892272A (en) * | 2012-10-17 | 2013-01-23 | 东莞劲胜精密组件股份有限公司 | Electronic product waterproof structure |
| CN202817018U (en) * | 2012-09-06 | 2013-03-20 | 深圳市灏天光电有限公司 | Excessive-glue-proof disposable mold strip |
| CN203141756U (en) * | 2013-01-14 | 2013-08-21 | 东莞华清光学科技有限公司 | Glue overflow preventing structure of silica gel injection mould |
-
2014
- 2014-04-02 CN CN201410132407.XA patent/CN103929915B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05245942A (en) * | 1992-03-09 | 1993-09-24 | Fujikura Rubber Ltd | Rubber-resin combined product and production of the same |
| JPH07336950A (en) * | 1994-06-14 | 1995-12-22 | Shibaura Eng Works Co Ltd | Mold electric motor |
| CN201490450U (en) * | 2009-08-26 | 2010-05-26 | 合兴集团汽车电子有限公司 | Control system connector of automobile engine |
| KR100992638B1 (en) * | 2010-02-05 | 2010-11-05 | 마주영 | Two step in-mold of injection mold |
| CN102529028A (en) * | 2010-12-30 | 2012-07-04 | 先锋材料科技股份有限公司 | Mold assembly |
| CN202817018U (en) * | 2012-09-06 | 2013-03-20 | 深圳市灏天光电有限公司 | Excessive-glue-proof disposable mold strip |
| CN102892272A (en) * | 2012-10-17 | 2013-01-23 | 东莞劲胜精密组件股份有限公司 | Electronic product waterproof structure |
| CN203141756U (en) * | 2013-01-14 | 2013-08-21 | 东莞华清光学科技有限公司 | Glue overflow preventing structure of silica gel injection mould |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103929915A (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103929915B (en) | Waterproof metal outer shell of electronic product and manufacturing method thereof | |
| CN203942731U (en) | A kind of metal waterproof case of electronic product | |
| CN105813412B (en) | Electronic device and preparation method thereof | |
| TWI514946B (en) | Housing and method for making same | |
| CN102202477B (en) | Electronic device shell | |
| US8528376B2 (en) | Mold set for manufacturing case and the method thereof | |
| CN102264198A (en) | Electronic product shell structure and processing technique thereof | |
| CN107116747A (en) | A kind of manufacture method of intelligent chopsticks and intelligent chopsticks | |
| CN108162302B (en) | Injection molding piece, injection molding method thereof and waterproof equipment | |
| CN107801334B (en) | Shell manufacturing method, shell and mobile terminal | |
| CN110722736A (en) | Shell, electronic device and manufacturing method of shell | |
| WO2008126618A1 (en) | Irregularly shaped gasket temporarily integral with film and method of producing the same | |
| CN104416915B (en) | Make the device and method of housing | |
| CN203876132U (en) | Waterproof molding structure of plastic component | |
| CN206011605U (en) | A kind of sealing structure of liquid silica gel injection | |
| CN107846487B (en) | A kind of method for producing shell, shell and mobile terminal | |
| CN102104013B (en) | Data card and assembling method thereof | |
| CN106064486B (en) | The method of moulding and electronic equipment of fiber molded product | |
| CN110900945B (en) | Manufacturing method of structural member, mold, shell and electronic equipment | |
| CN102202471A (en) | Electronic apparatus and manufacturing method thereof | |
| CN101653973A (en) | Rubber coating forming mould | |
| CN208478201U (en) | The double-layer plastic and plastics button cap structure on the surface with text or figure | |
| CN207170609U (en) | A kind of cell phone rear cover pressing equipment with the device that reports an error | |
| CN211591129U (en) | Injection mold | |
| CN102527110B (en) | Controllable high-density constant-temperature membrane filter plate and formation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523878 Changan City, Guangdong Province town on the corner management area Co-patentee after: Dongguan Hua Jing powder metallurgy company limited Patentee after: Guangdong wins smart group Limited by Share Ltd Address before: 523878 Changan City, Guangdong Province town on the corner management area Co-patentee before: Dongguan Hua Jing powder metallurgy company limited Patentee before: Dongguan Janus Precision Components Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210107 Address after: 644000 Hengxu science and Technology Industrial Park, west section of Gangyuan Road, Lingang Economic Development Zone, Yibin City, Sichuan Province Patentee after: Yibin Chuangshi Machinery Co.,Ltd. Address before: 523878 corner management area, Changan Town, Guangdong, Dongguan Patentee before: GUANGDONG JANUS INTELLIGENT GROUP Corp.,Ltd. Patentee before: DONGGUAN HUAJING POWDER METALLURGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |