CN105304377B - Button assembly and electronic installation - Google Patents
Button assembly and electronic installation Download PDFInfo
- Publication number
- CN105304377B CN105304377B CN201410238993.6A CN201410238993A CN105304377B CN 105304377 B CN105304377 B CN 105304377B CN 201410238993 A CN201410238993 A CN 201410238993A CN 105304377 B CN105304377 B CN 105304377B
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- CN
- China
- Prior art keywords
- contact
- circuit board
- axostylus axostyle
- button assembly
- perforation
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Abstract
The present invention discloses a kind of button assembly and electronic installation.Button assembly is arranged at the housing of electronic installation.Button assembly includes circuit board, axostylus axostyle, limiting section, contact and elastic component.Circuit board is arranged in housing, and with the first contact and the second contact.Axostylus axostyle passes through housing and circuit board, and with first end and the second end.Limiting section is located at the second end of axostylus axostyle.Contact is located between housing and circuit board.Elastic component is coupled between axostylus axostyle and circuit board, wherein when axostylus axostyle drives contact to be moved towards circuit board, and when contact is contacted the second contact, the second contact electrically connects the first contact to produce electric signal by contact.
Description
Technical field
The present invention relates to a kind of button assembly, and more particularly to a kind of electronic installation of this button assembly of application.
Background technology
In recent years, sci-tech product is main demand more with mobility and feature, therefore portable electronic devices are for example
The products such as intelligent mobile phone, panel computer and notebook computer have turned into the main flow of electronic consumer markets now.
In general, portable electronic devices are commonly provided with button on housing, and have in casing and correspond to this button
Switch element.Button is mutually coupled with switch element, and user by pressing keys come controlling switch element, and then can reach
The switch of control power supply, bluetooth or Wi-Fi, or be regulation volume, shoot with video-corder image or scroll the functions such as the page.
Typically, the housing of portable electronic devices must be provided with corresponding perforate to install switch element, in order to user
Operation.Because the overall volume of existing switch element is larger, and in order to be able to switch element being placed in foregoing perforate or being incited somebody to action
The partial component of switch element passes through foregoing perforate, therefore cannot effectively reduce the size of foregoing perforate.Consequently, it is possible to dust,
The gap that aqueous vapor is easy between switch element and foregoing perforate is entered into inside electronic installation so that the work(of electronic component
Can be affected, and reduce its service life.And, it is difficult to meet the design requirement of the slimming of portable electronic devices.
The content of the invention
It is an object of the invention to provide a kind of button assembly, its design requirement for meeting slimming.
It is an object of the invention to provide a kind of electronic installation, its using aforementioned keys assembly with save inside with being empty
Between, therefore may conform to the design requirement of slimming.
It is that, up to above-mentioned purpose, the present invention proposes a kind of button assembly, its housing for being arranged at electronic installation.Housing has the
One perforation.Button assembly includes circuit board, axostylus axostyle, limiting section, contact and elastic component.Circuit board is arranged at the interior of housing
Side, wherein circuit board have the second perforation, and circuit board has the first contact and the second contact.Axostylus axostyle have first end and
The second relative end.Through the first perforation and the second perforation, first end protrudes from the outside of housing to axostylus axostyle, and the second distal process goes out
In circuit board.Limiting section is located at the second end of axostylus axostyle, so that the second distal process is for circuit board.Contact is located at housing and circuit board
Between and be arranged at axostylus axostyle.Elastic component is coupled between axostylus axostyle and circuit board, wherein when axostylus axostyle drives contact towards circuit board
It is mobile, and when contact is contacted the second contact, the elastic potential energy of elastic component storage, and contact electrically connects the first contact, so that
Second contact electrically connects the first contact to produce electric signal by contact.
The present invention separately proposes a kind of electronic installation, and it includes body, housing and button assembly.Housing coats body, and
With the first perforation.Button assembly is arranged at housing.Button assembly includes circuit board, axostylus axostyle, limiting section, contact and elasticity
Part.Circuit board is arranged at the inner side of housing, and with the second perforation.Circuit board has the first contact and the second contact.Axostylus axostyle
With first end and the second relative end.Axostylus axostyle protrudes from the outer of housing through the first perforation and the second perforation, first end
Side, and the second distal process is for circuit board.Limiting section is located at the second end of axostylus axostyle, so that the second distal process is for circuit board.Contact
Between housing and circuit board and it is arranged at axostylus axostyle.Elastic component is coupled between axostylus axostyle and circuit board, wherein when axostylus axostyle drives
Contact is moved towards circuit board, and when contact is contacted the second contact, elastic component stores elastic potential energy, and contact is electrically connected
The first contact is connect, so that the second contact electrically connects the first contact to produce electric signal by contact.
Of the invention to propose a kind of button assembly and the electronic installation using this button assembly based on above-mentioned, wherein button is total
Into axostylus axostyle through housing first perforation, the components such as its limiting section, contact and elastic component are arranged in housing, and
Making the size of the first perforation can be reduced.So for it, the design requirement of the slimming of electronic installation is not only may conform to, also may be used
The probability entered into inside electronic installation via the first perforation from extraneous aqueous vapor or dust is reduced, for lifting electronic installation
Service life and reliability.
Specifically, axostylus axostyle is perforated also cross the second of circuit board, and contact is located between housing and circuit board and detains
It is held on axostylus axostyle, and elastic component is coupled between axostylus axostyle and circuit board.When user's pressing axostylus axostyle protrudes from the outside of housing
During part, axostylus axostyle can drive contact to be moved towards circuit board, and contact is contacted the second contact of circuit board.Now, electricity
Second contact of road plate can be by the first contact of contact electrical connection circuit plate producing electric signal, and then actuation electronics
Respective control function.Because button assembly degree of integration of the invention is high, therefore can effectively reduce its overall volume, and cause to answer
With the electronic installation of aforementioned keys assembly, the purpose for saving its internal configuration space is can reach, and then meet setting for slimming
Meter demand.
It is that features described above of the invention and advantage can be become apparent, special embodiment below, and coordinate appended attached
Figure is described in detail below.
Brief description of the drawings
Fig. 1 is the schematic diagram of the electronic installation of one embodiment of the invention；
Fig. 2 is the electronic installation of Fig. 1 along the generalized section of A-A hatching lines；
Fig. 3 is the schematic diagram of the button assembly of Fig. 1；
Fig. 4 is the exploded view of the button assembly of Fig. 3；
Fig. 5 is the fragmentary, perspective view at the button assembly place of the electronic installation of Fig. 1；
Fig. 6 is the schematic diagram after the button assembly start of Fig. 5；
Fig. 7 is the partial cutaway schematic of another embodiment of the present invention electronic installation.
Symbol description
10：Electronic installation
11：Body
12：Housing
12a：First perforation
12b、123：Groove
12s：Side wall
100：Button assembly
110：Circuit board
111：Second perforation
112：First surface
113：First contact
114：Second contact
115：Second surface
120：Axostylus axostyle
121：First end
122：Second end
130：Limiting section
140：Sealing material
150：Contact
151：Fixing end
152：Free end
160：Elastic component
170：Pad
Specific embodiment
Fig. 1 is the schematic diagram of the electronic installation of one embodiment of the invention.Fig. 2 is electronic installation the cuing open along A-A hatching lines of Fig. 1
Face schematic diagram.Fig. 3 is the schematic diagram of the button assembly of Fig. 1, wherein to clearly show that, Fig. 2 is omitted to illustrate and is arranged in housing 12
Partial component.Fig. 1 to Fig. 3 is refer to, in the present embodiment, electronic installation 10 includes that body 11, housing 12 and button are total
Into 100.Housing 12 coats body 11 and with the first perforation 12a, and button assembly 100 is arranged at housing 12.Electronic installation 10
E.g. mobile phone, intelligent mobile phone or panel computer, and housing 12 is, for example, plastic casing or carbon fiber shell, it is also possible to
The combined housing that to be plastic cement constituted with metal.Here, the quantity of the first perforation 12a is, for example, one and positioned at the side of housing 12
On wall 12s, but the present invention does not limit the first perforation 12a in the position on housing 12, and the number of the first perforation 12a is not limited yet
Amount, end has adjusted depending on actual design demand.
Thin portion structure below for button assembly 100 is further described.In this embodiment, button assembly 100
Housing 12 is arranged at, it may include circuit board 110, axostylus axostyle 120, limiting section 130, seal 140, contact 150 and elasticity
Part 160.Circuit board 110 is arranged at the inner side of housing 12, and with the second perforation 111.In general, circuit board 110 can be
Rigid printed circuit board (PCB) or combined type circuit board, and the second perforation 111 is, for example, shape by the manufacture craft such as etching or drilling
Into in circuit board 110, the present invention is not any limitation as to this.
Fig. 4 is the exploded view of the button assembly of Fig. 3.Refer to 2 to Fig. 4, circuit board 110 also has the towards housing 12
One surface 112 and the first contact 113 and the second contact 114 on first surface 112.Specifically, the second perforation
111 position substantially with the first perforation 12a is corresponding, and the first contact 113 is, for example, around the second perforation 111
Annular patterns, and the second contact 114 is, for example, rectangular patterns, but the invention is not restricted to this, the first contact 113 and the second contact
114 types of patterns end has adjusted depending on actual design demand.In general, the first contact 113 and the second contact 114 are for example
It is to be printed by plating, wire mark or spray the methods such as printing and be formed at the circuit pattern on circuit board 110, its material can be
The good metal of the electric conductivity such as copper, gold, silver or nickel.Although being herein to be arranged on same surface (that is, first surface 112)
First contact 113 and the second contact 114 are for example, but the invention is not restricted to this.Therefore in other embodiments, first connects
The contact 114 of point 113 and second can also be respectively arranged at the different surfaces on circuit board 110.
Axostylus axostyle 120 is each passed through the perforation of the first perforation 12a and second 111, and with first end 121 and relative the
Two ends 122, wherein first end 121 protrude from the outside of housing 12, as button so that user presses.Second end 122 protrudes
In the second surface 115 relative to first surface 112 of circuit board 110, wherein limiting section 130 is located at the second end of axostylus axostyle 120
122, and limiting section 130 size more than second perforation 111 size so that the second end 122 can be limited in phase in circuit board 110
For the side of the second contact 114, that is, second surface 115 place side.In general, limiting section 130 is, for example, to be locked in
Nut on second end 122 of axostylus axostyle 120, also or be shaped in axostylus axostyle 120 the second end 122 position limiting structure, this hair
It is bright that this is not any limitation as.
Because the first perforation 12a is only for setting used by axostylus axostyle 120, therefore compared in the prior art for housing overall opening
Close for the perforate of element, the first perforation 12a's can effectively reduce, to meet the design requirement of miniaturization, and can reduce
From the probability that extraneous aqueous vapor or dust are entered into inside electronic installation 10 via the first perforation 12a, for lifting electronic installation
10 service life and reliability.
Due to the size of the size more than the second perforation 111 of limiting section 130, therefore when axostylus axostyle 120 towards the outer of housing 12
When portion moves, the interference that limiting section 130 will be produced in structure with circuit board 110 so that second end 122 of axostylus axostyle 120 is permanent prominent
In second surface 115, and outside falling out housing 12 from the first perforation 12a after preventing axostylus axostyle 120 from being separated with circuit board 110.
Seal 140 is arranged between the inwall of the perforation of axostylus axostyle 120 and first 12a, and is fixed on axostylus axostyle 120, its
Middle seal 140 can be o-ring (O ring), but the invention is not restricted to this.Specifically, ring on the outer peripheral face of axostylus axostyle 120
The groove 123 for placing o-ring is provided with, so that groove 123 can be limited in after o-ring is arranged on axostylus axostyle 120, and is difficult from axle
Bar 120 departs from.Also, o-ring is abutted against with the inwall of the first perforation 12a, therefore can be by O from extraneous aqueous vapor or dust
Type ring is intercepted in outer, service life and reliability for lifting electronic installation.
Contact 150 is located between housing 12 and circuit board 110, and its material can be the electric conductivity such as copper, gold, silver or nickel
Good metal.In the present embodiment, contact 150 have be fixed on the fixing end 151 of axostylus axostyle 120 and relative free end
152, wherein fixing end 151 is, for example, C-shaped clasp (C-type retaining ring), so that contact 150 can be by C-shaped
Clasp securely clasp (clamp) on axostylus axostyle 120.On the other hand, free end 152 is in place corresponding to the institute of the second contact 114
Put, and elastic component 160 is coupled between axostylus axostyle 120 and circuit board 110.Here, elastic component 160 is, for example, conductive spring pad
Circle (spring washer) is arranged between the fixing end 151 of contact 150 and the first contact 113 of circuit board 110, and axle
Bar 120 passes through spring washer.
On the other hand, button assembly 100 also includes pad 170, and pad 170 is arranged at spring washer with circuit board 110
Between first contact 113.Wherein, the fixing end 151 of contact 150, between elastic component 160 and the three of pad 170 each other electricity
Connection, and pad 170 is electrically connected to the first contact 113.That is, in the present embodiment, the contact of contact 150 and first
Electric connection mode between 113 is, for example, that the fixing end 151 and pad of abutting contact part 150 are distinguished by elastic component 160
170, and pad 170 contacts the connection relationship such as the first contact 113 and reached, now, axostylus axostyle 120 can be non-conductive material, for example
Plastic cement, acryl or other appropriate materials are constituted, and contact 150 can be first not against in elastic component 160, but work as axostylus axostyle
When 120 drive contacts 150 are moved towards circuit board 110 and are resisted against elastic component 160, contact 150 is just electrically connected to first
Contact 113, but the present invention is not any limitation as to this.Herein, elastic component 160 is illustrated as above, for reaching with spring washer
The purpose of the configuration space inside to saving electronic installation 10, and meet the design requirement of slimming, but the invention is not restricted to this.
In other embodiments, elastic component 160 can also be compression spring or other appropriate elastic constructions.And it is being not provided with pad
In the case of 170, can also make elastic component 160 abut the first contact 113 and contact 150 respectively so that the first contact 113 with connect
Contact element 150 is electrically connected to each other.
Although above-described embodiment is the axostylus axostyle 120 constituted with non-conductive material explaining, in other embodiments, axle
Bar 120 or conductive material, such as metal are constituted.That is, contact 150 still can be by conductive axostylus axostyle 120
Electrically connected with the first contact 113 with elastic component 160.Now, the fixing end 151 of contact 150 can abut or not be connected to bullet
Property part 160, the present invention this is not any limitation as.For example, the fixing end 151 in contact 150 is not connected to elastic component 160
In the case of, contact 150 is, for example, with the conducting path of the first contact 113：The conductive axostylus axostyle 120- bullets of contact 150-
The first contacts of property part 160- pads 170- 113, wherein may be selected to be not provided with pad 170, and make elastic component 160 be connected to first
Contact 113.
Fig. 5 is the fragmentary, perspective view at the button assembly place of the electronic installation of Fig. 1.Fig. 6 is the button assembly start of Fig. 5
Schematic diagram afterwards.Fig. 5 and Fig. 6 is refer to, when axostylus axostyle 120 drives contact 150 to be moved towards circuit board 110, and makes contact
When 150 free end 152 contacts the second contact 114, elastic component 160 is subject to the pushing and pressing of the fixing end 151 of contact 150 and deforms
And store elastic potential energy.The fixing end 151 and pad of abutting contact part 150 can be still distinguished due to the elastic component 160 after deformation
170, therefore the second contact 114 still can electrically connect the first contact 113 by contact 150.Here, the first contact 113 with contact
The conducting path of part 150 is and the pad 170 with the fixing end 151 and pad 170 of the difference of elastic component 160 abutting contact part 150
The first contact 113 is contacted to illustrate.Now, axostylus axostyle 120 can be non-conductive material, such as plastic cement, acryl or other are appropriate
Material is constituted, but the present invention is not any limitation as to this.
In the second contact 114 by contact 150, elastic component 160 and pad 170 with can after electrically connecting the first contact 113
Produce electric signal, and the second contact 114, contact 150, elastic component 160, the contact of pad 170 and first being electrically connected to each other
113 may make up conductive loops, and because circuit board 110 is electrically connected with body 10, therefore foregoing electric signal can further be sent to machine
Body 11 so that in body 11 corresponding processing unit (not illustrating) can according to foregoing electric signal output control signal, it is and foregoing
Control signal is, for example, power cut signal, volume adjustment signal or picture rolling signal etc..In the electronics of electronic installation 10
After element (not illustrating) receives aforementioned control signals, electronic component (not illustrating) can be actuated to perform corresponding function, for example
The lifting of the switch, volume of power supply or scrolling etc. up and down of the picture of display screen.
Then, when the removal of the external force of first end 121 of axostylus axostyle 120 is put on, the bullet stored when deforming of elastic component 160
Property potential energy is released, and is ordered about elastic component 160 and returned back to original state as shown in Figure 5.Now, contact 150 can be received
The direction movement of circuit board 110 is directed away to the pushing and pressing of elastic component 160 so that free end 152 separates with the second contact 114
Come.Now, first end 121 possesses spacing with housing 12, so that user subsequently uses.Specifically, in the second contact 114
Not via contact 150, elastic component 160 and pad 170 to electrically connect the first contact 113 in the case of, have no foregoing electric signal
Generation and foregoing conductive loops interrupt, therefore electronic installation 10 can be stopped and perform above-mentioned corresponding function, the switch of such as power supply,
The lifting of volume or scrolling etc. up and down of the picture of display screen.The first end 121 of person for later use pressing axostylus axostyle 120 with
Drive contact 150 to be moved towards circuit board 110, the free end 152 of contact 150 is contacted the second contact 114, to make second
When contact 114 produces electric signal with pad 170 via contact 150, elastic component 160 to electrically connect the first contact 113, electronics
Device 10 can again perform above-mentioned corresponding function.
Fig. 7 is the partial cutaway schematic of another embodiment of the present invention electronic installation, its profile position generally with Fig. 2 institutes
It is consistent at the partial enlargement for showing.Refer to Fig. 7, the set-up mode of the seal 140 of electronic installation and the sealing of above-described embodiment
The set-up mode of part 140 is slightly different, and is at its difference：The seal 140 of the electronic installation of Fig. 7 is for example affixed to first
The inwall of perforation 12a, for example, seal 140 can be fixed in the groove 12b on the inwall of the first perforation 12a, and in axle
Bar 120 can be limited in groove 12b after being arranged on the first perforation 12a, and be difficult to depart from from groove 12b.Also, seal
140 abut against with the outer peripheral face of axostylus axostyle 120, therefore can be intercepted in outer by seal 140 from extraneous aqueous vapor or dust, use
In the service life and reliability of lifting electronic installation.
In sum, the present invention proposes the electronic installation of a kind of button assembly and this button assembly of application, and wherein button is total
Into axostylus axostyle through housing first perforation, the components such as its limiting section, contact and elastic component are arranged in housing, and
Making the size of the first perforation can be reduced.So for it, the design requirement of the slimming of electronic installation is not only may conform to, also may be used
The probability entered into inside electronic installation via the first perforation from extraneous aqueous vapor or dust is reduced, for lifting electronic installation
Service life and reliability.
Specifically, axostylus axostyle is perforated also cross the second of circuit board, and contact is located between housing and circuit board and detains
It is held on axostylus axostyle, and elastic component is coupled between axostylus axostyle and circuit board.When user's pressing axostylus axostyle protrudes from the outside of housing
During part, axostylus axostyle can drive contact to be moved towards circuit board, and make the second contact of the free end in contact circuit board of contact.
Now, the second contact of circuit board by the first contact of contact electrical connection circuit plate to produce electric signal, and then can be activated
The respective control function of electronic installation.Because button assembly degree of integration of the invention is high, therefore can effectively reduce its overall volume,
And cause to can reach the purpose for saving its internal configuration space using the electronic installation of aforementioned keys assembly, and then meet slim
The design requirement of change.
Although disclosing the present invention with reference to above example, but it is not limited to the present invention, any affiliated technology
Have usually intellectual in field, without departing from the spirit and scope of the present invention, a little change can be made with retouching, therefore this hair
Bright protection domain should be by being defined that the claim enclosed is defined.
Claims (10)
1. a kind of button assembly, is arranged at the housing of electronic installation, and the housing has the first perforation, it is characterised in that the button
Assembly includes：
Circuit board, is arranged at the inner side of the housing, the circuit board have second perforation, and the circuit board have the first contact and
Second contact；
Axostylus axostyle, with first end and the second relative end, through first perforation and second perforation, this first for the axostylus axostyle
, for the outside of the housing, and second distal process is for the circuit board for distal process；
Limiting section, positioned at second end of the axostylus axostyle, so that second distal process is for the circuit board；
Contact, between the housing and the circuit board, the contact is arranged at the axostylus axostyle；And
Elastic component, is coupled between the axostylus axostyle and the circuit board, and wherein the contact is two separate elements with the elastic component,
And the elastic component is arranged between the contact and the circuit board, wherein when the axostylus axostyle drives the contact to be moved towards the circuit board
It is dynamic, and when the contact is contacted second contact, the elastic potential energy of elastic component storage, and the contact electrically connects this and first connects
Point, so that second contact electrically connects first contact to produce electric signal by the contact.
2. button assembly as claimed in claim 1, it is characterised in that the circuit board has the first table towards first perforation
Face, and first contact and second contact are on the first surface.
3. button assembly as claimed in claim 1, it is characterised in that also include：
Seal, is arranged between the inwall of the axostylus axostyle and first perforation, and wherein the seal includes o-ring.
4. button assembly as claimed in claim 3, it is characterised in that the seal is fixed on the axostylus axostyle, the axostylus axostyle it is outer
The groove for placing the seal is equipped with side face.
5. button assembly as claimed in claim 1, it is characterised in that the size of the limiting section is more than biperforate chi
It is very little.
6. button assembly as claimed in claim 3, it is characterised in that the seal is fixed on the inwall of first perforation, should
The groove for placing the seal is equipped with the inner edge surface of inwall.
7. button assembly as claimed in claim 1, it is characterised in that the contact has the fixing end for being fixed on the axostylus axostyle,
And relative free end, and wherein when the axostylus axostyle drives the contact to be moved towards the circuit board, the free end in contact should
Second contact.
8. button assembly as claimed in claim 7, it is characterised in that the fixing end of the contact includes C-shaped clasp, the C
Shape clasp is held on the axostylus axostyle.
9. button assembly as claimed in claim 1, it is characterised in that the elastic component is spring washer, and the axostylus axostyle was through should
Spring washer.
10. button assembly as claimed in claim 9, it is characterised in that also include：
Pad, is arranged between the spring washer and first contact of the circuit board, and is electrically connected to the contact and is somebody's turn to do
First contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410238993.6A CN105304377B (en) | 2014-05-30 | 2014-05-30 | Button assembly and electronic installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410238993.6A CN105304377B (en) | 2014-05-30 | 2014-05-30 | Button assembly and electronic installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105304377A CN105304377A (en) | 2016-02-03 |
| CN105304377B true CN105304377B (en) | 2017-06-06 |
Family
ID=55201494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410238993.6A Expired - Fee Related CN105304377B (en) | 2014-05-30 | 2014-05-30 | Button assembly and electronic installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105304377B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107770971B (en) * | 2017-08-31 | 2020-04-03 | 努比亚技术有限公司 | Paster conductive gasket, circuit board and mobile terminal |
| CN107680857A (en) * | 2017-11-03 | 2018-02-09 | 上海摩软通讯技术有限公司 | Button assembly and the mobile terminal for including it |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4007347A (en) * | 1975-07-28 | 1977-02-08 | Haber Terry M | Simplified actuating switch for electronic timepieces |
| JP3731739B2 (en) * | 2001-10-31 | 2006-01-05 | 日本精機株式会社 | Vehicle meter |
| US6570105B1 (en) * | 2002-05-06 | 2003-05-27 | Lear Corporation | Retractable rotary switch cell |
| CN102403147B (en) * | 2010-09-10 | 2014-03-26 | 富泰华工业（深圳）有限公司 | Press key structure and electronic device comprising same |
| CN103578822B (en) * | 2012-07-27 | 2016-05-11 | 富泰华工业（深圳）有限公司 | Electronic installation and power knob module thereof |
-
2014
- 2014-05-30 CN CN201410238993.6A patent/CN105304377B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105304377A (en) | 2016-02-03 |
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