CN206977903U - Configure the vehicle-mounted middle control guider of high-fidelity power amplifier - Google Patents
Configure the vehicle-mounted middle control guider of high-fidelity power amplifier Download PDFInfo
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- CN206977903U CN206977903U CN201720843771.6U CN201720843771U CN206977903U CN 206977903 U CN206977903 U CN 206977903U CN 201720843771 U CN201720843771 U CN 201720843771U CN 206977903 U CN206977903 U CN 206977903U
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Abstract
A kind of vehicle-mounted middle control guider for configuring high-fidelity power amplifier, including navigation circuit plate, power amplifier circuit board and radiation shell.Heating element is all disposed within the one side of power amplifier circuit board.Power amplifier circuit board is arranged in power discharging device installation cavity room, make shell wall of the heating element in power amplifier circuit board both facing to radiation shell, it is also filled with using insulating heat-conductive film made of insulating heat-conduction material between heating element and the shell wall of radiation shell, to make the heat of heating element to conduct to radiation shell.The utility model enables heat caused by high-power heating element to distribute rapidly, to meet the radiating requirements of high-fidelity Hi Fi power amplifiers, allows on-vehicle navigation apparatus to reach high-fidelity Hi Fi audios.
Description
Technical field
Electrical appliance radiator structure is the utility model is related to, more particularly to high-power on low-power electrical device to fit in
Component and the radiator structure set.
Background technology
As vehicle mounted guidance product function is constantly expanded, navigation product is generally equipped with the function of video and audio broadcasting, enters
And higher and higher demand is proposed to the audio of navigation product, i.e. market is needed with high-fidelity High-Fidelity audios
Guider.The power amplifier assembly that prior art reaches high-fidelity Hi-Fi audios is built using discrete component mostly, because of it
Power is big, it is high to produce heat and requires that radiating is good, should have enough spaces and cooling measure to distribute high heat, otherwise easily
Cause the damage of power amplification component.On-vehicle navigation apparatus is arranged on vehicle centre console position, console energy by prior art
Enough it is supplied to the installing space of the on-vehicle navigation apparatus very limited, and the on-vehicle navigation apparatus can be circuit board
It is just more limited that the space provided is installed.On-vehicle navigation apparatus is in order to be adapted to limited interior space, often using more compact
Structure, be difficult in limited guider space arrange high-fidelity Hi-Fi power amplifier assemblies.Although prior art has
The scheme of high-fidelity Hi-Fi power amplifier devices is separately configured outside guider to improve audio, but the program also suffers from
Interior space limits, and has a very big layout difficulty, and the layout scheme of different automobile types is incompatible；In addition, vehicle power uses 12V
Low-voltage DC supply, to be applicable requirement of the high-fidelity Hi-Fi power amplifications to power supply, it is necessary to be made to in-car original circuit structure
Adjustment, repacking, reduce in-car circuit safety.Therefore prior art there is not yet the car of configuration high-fidelity Hi-Fi power amplifiers
Guider is controlled in load.
Utility model content
The technical problems to be solved in the utility model is to avoid the deficiencies in the prior art part and propose one kind by changing
Enter the vehicle-mounted middle conduct boat dress that high-fidelity power discharging device is integrated into the configuration high-fidelity power amplifier of guider by radiator structure
Put.
The utility model, which solves the technical problem, to be realized by using following technical scheme：
Design, manufacture a kind of vehicle-mounted middle control guider of configuration high-fidelity power amplifier, including be mainly used in completion and lead
The navigational material for function of navigating.The navigational material includes at least navigation circuit plate for being provided with navigation electric device.Configuration is high
The vehicle-mounted middle control guider of fidelity power amplifier also includes being mainly used in the power discharging device for completing high-fidelity power amplification function, and
The radiation shell made of good heat conductive material.The power discharging device includes at least power amplifier for being provided with power amplifier electric device
Plate.The radiation shell sets navigational material installation chamber independent mutually and power discharging device installation chamber.The power amplifier electric device
Including heating element and non-heating element, all heating elements are all disposed within the one side of power amplifier circuit board, all non-hairs
Hot component is all disposed within the another side of power amplifier circuit board.The navigation circuit plate is arranged in navigational material installation cavity room, institute
Power amplifier circuit board is stated in power discharging device installation cavity room, makes the heating element in power amplifier circuit board both facing to radiation shell
Shell wall, it is also filled with using insulating heat-conductive film made of insulating heat-conduction material between heating element and the shell wall of radiation shell,
To make the heat of heating element to conduct to radiation shell.
To improve area of dissipation, the power discharging device installation chamber includes bottom of chamber wall, and connects the bottom of chamber wall and surround
Power discharging device installs the chamber leg of chamber.Connected on the chamber leg at least one with made of good heat conductive material, from chamber leg
The radiating fin stretched out to outside power discharging device installation cavity room.
Good heat conductive material described above is cast aluminium.
For further improving radiating effect, an at least radiator fan is set in radiation shell, to accelerate power discharging device to install
Cross-ventilation in chamber.
Specifically, configuring the vehicle-mounted middle control guider of high-fidelity power amplifier also includes capping power discharging device installation cavity
First capping plate of room, and the second capping plate of capping navigational material installation chamber.
Specifically, the navigational material includes navigation system core component, electrically connects the electricity of the navigation system core component
Source component, input/output interface component, radio reception component, touch panel unit, video output component and screen drive component.The screen drives
Dynamic component is also electrically connected with display screen component.Electric device in each component of navigational material includes being arranged on navigation circuit plate
Navigate electric device outside navigation electric device and the plate being arranged on outside navigation circuit plate.The power discharging device includes power amplification core group
Part, and electrically connect the DC-DC voltage transmissions component of the power amplification core component, preposition amplifier module, microcontroller, protection
Circuit unit and equalizer element.The equalizer element also electrically connects navigation system core component.Each component of power discharging device
In electric device include the power amplifier electric device that is arranged in power amplifier circuit board and the plate external work being arranged on outside power amplifier circuit board electric discharge
Element.
The plate external work arresting element includes non-heating element outside the outer heating element of plate and plate；The outer heating element of plate
Set all along the shell wall of radiation shell, and be also filled with being led with insulation between heating element and the shell wall of radiation shell outside plate
Insulating heat-conductive film made of hot material, to make the heat of heating element outside plate to conduct to radiation shell.
Insulating heat-conduction material described above is insulating heat-conductive silicon.
Specifically.Bulk in the navigational material installation cavity room be it is long 177.4 millimeters, wide 148.3 millimeters and
It is high 54.8 millimeters either long 178.6 millimeters, wide 100.5 millimeters and high 71.5 millimeters；And in the power discharging device installation cavity room
Bulk be it is long 177.4 millimeters, it is wide 148.3 millimeters and high 54.8 millimeters or long 178.6 millimeters, wide 100.5 millimeters
With it is high 71.5 millimeters.
Compared with the existing technology compared with the skill of the utility model " the vehicle-mounted middle control guider of configuration high-fidelity power amplifier "
Art effect is：
Radiator structure of the utility model by improvement installed in the on-vehicle navigation apparatus of vehicle centre console, makes high-power hair
Heat can distribute rapidly in the space of finite capacity caused by hot component, to meet the radiating of high-fidelity Hi-Fi power amplifiers
Demand, make power discharging device to be incorporated into security and stability in guider, allow guider to reach high-fidelity Hi-Fi sounds
Effect；
The utility model will be whole installed in the on-vehicle navigation apparatus of vehicle centre console and high-fidelity Hi-Fi power amplifying devices
Close, make repacking without the circuit to former car and structure, without professional complete installation, realize lossless installation, avoid because
Vehicle refitting causes potential safety hazard, and consumer can save money, be time saving and laborsaving.
Brief description of the drawings
Fig. 1 is the back of the utility model " the vehicle-mounted middle control guider of configuration high-fidelity power amplifier " preferred embodiment
Axonometric projection schematic diagram；
Fig. 2 is preferred embodiment longitudinal direction schematic cross-sectional view；
Fig. 3 is the preferred embodiment decomposing state axonometric projection schematic diagram；
Fig. 4 is the back axonometric projection schematic diagram of the power amplifier circuit board 2 of the preferred embodiment；
Fig. 5 is the positive axonometric projection schematic diagram that the preferred embodiment removes the first capping plate；
Fig. 6 is the circuit theory schematic block diagram of the preferred embodiment.
Embodiment
It is described in further detail below in conjunction with preferred embodiment shown in accompanying drawing.
It is described the utility model proposes a kind of heat dissipating method for the vehicle-mounted middle control guider for configuring high-fidelity power amplifier
Vehicle-mounted middle control guider is arranged on the console of vehicle, including is mainly used in completing the navigational material 3 of navigation feature and main
For completing the power discharging device 2 of high-fidelity power amplification function.Due to the component and element in navigational material 3 and power discharging device 2
There are some to be individually used for completing navigation feature；There are some to be individually used for completing power amplification function；It can either more also be used for
Navigation feature is completed, and can, which is enough in, completes power amplification function, such as belongs to the input/output interface component 34 of navigational material 3
It is not only to complete navigation feature to provide interface, such as wired communication interface, storage expansion interface, is also provided to complete power amplifier function
Interface, such as audio input interface, audio output interface；The generic configuration for there are some to be intended only as power device in addition, have no bright
Really it is used to complete navigation feature or power amplification function, such as power supply module 33.Therefore navigational material 3 and power discharging device 2 are all
It is mainly to complete respective function, without being only capable of completing respective function.The navigational material 3 includes being provided with navigation electricity
An at least navigation circuit plate 31 for element.The power discharging device 2 includes at least power amplifier electricity for being provided with power amplifier electric device
Road plate 21.It is described configuration high-fidelity power amplifier it is vehicle-mounted it is middle control guider heat dissipating method comprise the following steps,
Manufactured with good heat conductive material and installed with the navigational material installation chamber 13 being independently arranged mutually and power discharging device
The radiation shell 1 of chamber 12.The utility model preferred embodiment, good heat conductive material use cast aluminium.Power amplifier electric device includes heating
Component 28 and non-heating element, all heating elements 28 are all disposed within to the one side of power amplifier circuit board 21, will be all non-
Heating element is all disposed within the another side of power amplifier circuit board 21.The installation navigation circuit plate in navigational material installation chamber 13
31, the installation power amplifier circuit board 21 in power discharging device installation chamber 12, make the heating element 28 in power amplifier circuit board 21
Both facing to the shell wall of radiation shell 1, between the shell wall of heating element 28 and radiation shell 1 made of filling insulating heat-conduction material
Insulating heat-conductive film 6, to make the heat of heating element 28 to conduct to radiation shell 1.
The heating element 28 be refer to because temperature rise is too high and caused by its damage component.For example, it is used for power
The transistor of amplification, IGCT, integrated circuit, data processor etc..It is tolerable that heating element 28 generally can all limit its
Limit of temperature rise, in order to meet the limit of temperature rise, it is necessary to do radiating treatment to heating element 28.The non-heating element is
Refer to its work is not influenceed by temperature rise, or the component that the temperature rise being resistant to is very big.Such as inductance, resistance etc..
Based on above method, the utility model also proposes a kind of vehicle-mounted middle conduct boat dress for configuring high-fidelity power amplifier
Put, as shown in Figures 1 to 6, including be mainly used in completing the navigational material 3 of navigation feature.The navigational material 3 includes setting thereon
There is an at least navigation circuit plate 31 for navigation electric device.Also include being mainly used in completing high-fidelity Hi-Fi power amplification functions
Power discharging device 2, and radiation shell 1 made of good heat conductive material.The utility model preferred embodiment, good heat conductive material are adopted
Use cast aluminium.The power discharging device 2 includes being provided with an at least power amplifier circuit board 21 for power amplifier electric device.Such as Fig. 3 and Fig. 5 institutes
Show, the radiation shell 1 sets navigational material installation chamber 13 independent mutually and power discharging device installation chamber 12.As shown in figure 4,
The power amplifier electric device includes heating element 28 and non-heating element, and all heating elements 28 are all disposed within power amplifier
The one side of plate 21, all non-heating elements are all disposed within the another side of power amplifier circuit board 21.Heating element 28 and non-heating
Component is separately positioned on the two sides of power amplifier circuit board 21, can use the circuit that is printed on one side, simultaneously directly weld, another side is worn
The mode that eyelet welding connects is realized, or using circuitron, the mode that two sides is each directly welded is realized.The navigation circuit
Plate 31 is arranged in navigational material installation chamber 13, and the power amplifier circuit board 21 is arranged in power discharging device installation chamber 12, is made
Heating element 28 in power amplifier circuit board 21 both facing to radiation shell 1 shell wall, in heating element 28 and the shell wall of radiation shell 1
Between be also filled with using insulating heat-conductive film 6 made of insulating heat-conduction material, to make the heat of heating element 28 to conduct
To radiation shell 1.The utility model said structure in the same side of power amplifier circuit board 21, borrows the concentrated setting of heating element 28
Helping the power amplifier circuit board 21 of fixed installation makes heating element 28 be arranged close to radiation shell 1；Radiation shell 1 had both been used for device and installed,
Also radiation efficiency is improved using its surface area much larger than the heating surface of heating element 28, to distribute heating element 28 rapidly
Caused heat.
For suitable for installing the vehicle-mounted middle control guider in console position, and in order to meet professional standard, this reality
With new preferred embodiment, the bulk in the navigational material installation cavity room be long 177.4 millimeters, wide 148.3 millimeters and
It is high 54.8 millimeters or long 178.6 millimeters, wide 100.5 millimeters and high 71.5 millimeters；In the power discharging device installation cavity room
Bulk be it is long 177.4 millimeters, wide 148.3 millimeters and high 54.8 millimeters, or long 178.6 millimeters, wide 100.5 millimeters and
It is high 71.5 millimeters.
The utility model preferred embodiment, as shown in figure 5, power discharging device installation chamber 12 includes bottom of chamber wall, and
Connect the bottom of chamber wall and surround the chamber leg 122 of power discharging device installation chamber 12.The bottom of chamber wall is the place of heating element 28
The shell wall of the radiation shell 1 of the one side institute face of power amplifier circuit board 21, that is, the shell of the radiation shell 1 of 28 directions of heating element
Wall.At least one is connected on the chamber leg 122 to use made of good heat conductive material, from chamber leg 122 to power discharging device installation cavity
The radiating fin 123 that room 12 is overhang.The utility model preferred embodiment, good heat conductive material use cast aluminium.Radiating fin 123
Play a part of increasing cooling surface area in same volume.It can also be increased by the air gap between adjacent two radiating fin 123
Strong cross-ventilation effect and further enhance radiating effect.
The utility model preferred embodiment, the insulating heat-conduction material use insulating heat-conductive silicon, and insulating heat-conductive film 6 is exactly
Insulating heat-conductive silica gel piece.
The utility model preferred embodiment, as shown in figure 3, an at least radiator fan 7 is set in radiation shell 1, to accelerate
Cross-ventilation in power discharging device installation chamber 12, further optimizes radiating effect.
The utility model preferred embodiment, as shown in figure 3, the vehicle-mounted middle control guider of configuration high-fidelity power amplifier is also
Include the first capping plate 4 of capping power discharging device installation chamber 12, and the second capping of capping navigational material installation chamber 13
Plate 5.The utility model preferred embodiment, it is provided with two in the one side of the first capping plate 4 towards power discharging device installation chamber 12 and dissipates
Hot-air fan 7, the radiator fan 7 are more than the axial cooling fan of axial dimension using radial dimension.
The utility model preferred embodiment, as shown in fig. 6, the navigational material 3 includes navigation system core component 32, electricity
Connect power supply module 33, input/output interface component 34, radio reception component 35, the touch panel unit of the navigation system core component 32
36th, video output component 37 and screen drive component 38.The screen drive component 38 also electrically connects display screen component 39.Navigational material
Electric device in 3 each component includes the navigation electric device being arranged on navigation circuit plate 31 and is arranged on outside navigation circuit plate
Navigate electric device outside plate.The navigation system core component 32 includes the Wireless Fidelity Wireless- of abbreviation Wi-Fi communication modules
Fidelity communication modules, third generation 3G wireless communication modules, forth generation 4G wireless communication modules, and bluetooth Bluetooth
Wireless communication module.The utility model preferred embodiment, as shown in figure 3, Wi-Fi communication modules, third generation 3G radio communication molds
The respective antenna of block, forth generation 4G wireless communication modules and bluetooth Bluetooth wireless communication modules is arranged on antenna circuit
On plate 8, the antenna circuit board 8 is arranged on the second capping plate 5.The power discharging device 2 includes power amplification core component 22, with
And electrically connect DC-DC voltage transmissions component 23, preposition amplifier module 24, the microcontroller of the power amplification core component 22
25th, protection circuit component 26 and equalizer element 27.The equalizer element 27 also electrically connects navigation system core component 32.Institute
It is that DC voltage change one of sending component, its specific implementation is inverter component to state DC-DC voltage transmissions component 23.It is described
Power amplification core component 22 is formed with discrete component, and the utility model preferred embodiment is discrete using four 60W power amplifications
Element is formed, i.e. 4 × 60W power amplification discrete components.Electric device in each component of power discharging device 2 includes being arranged on power amplifier electricity
Power amplifier electric device on road plate 21 and the plate external work arresting element being arranged on outside power amplifier circuit board.
The plate external work arresting element includes non-heating element outside the outer heating element of plate and plate；The outer heating element of plate
It is also filled with using insulating heat-conductive all along the shell wall setting of radiation shell, and outside plate between heater element and the shell wall of radiation shell
Insulating heat-conductive film made of material, to make the heat of heating element outside plate to conduct to radiation shell.
The utility model preferred embodiment, the insulating heat-conduction material use insulating heat-conductive silicon, and insulating heat-conductive film 6 is exactly
Insulating heat-conductive silica gel piece.
Radiator structure of the utility model by improvement installed in the on-vehicle navigation apparatus of vehicle centre console, makes high-power hair
Heat caused by hot component 28 can distribute rapidly, to meet the radiating requirements of high-fidelity Hi-Fi power amplifiers, make power discharging device 2
It can be incorporated into security and stability in guider, allow guider to reach high-fidelity Hi-Fi audios.Meanwhile this practicality
It is new to integrate guider and high-fidelity Hi-Fi power amplifying devices 2, repacking is made without the circuit to former car and structure,
Complete to install without professional, realize lossless installation, avoid the potential safety hazard caused by vehicle refitting, consumer can save
It is money, time saving and laborsaving.
Claims (9)
1. the vehicle-mounted middle control guider of high-fidelity power amplifier is configured a kind of, including is mainly used in completing the navigation of navigation feature
Device；The navigational material includes at least navigation circuit plate for being provided with navigation electric device；It is characterized in that：
Also include being mainly used in the power discharging device for completing high-fidelity power amplification function, and dissipated made of good heat conductive material
Hot shell；The power discharging device includes being provided with an at least power amplifier circuit board for power amplifier electric device；
The radiation shell sets navigational material installation chamber independent mutually and power discharging device installation chamber；
The power amplifier electric device includes heating element and non-heating element, and all heating elements are all disposed within power amplifier
The one side of plate, all non-heating elements are all disposed within the another side of power amplifier circuit board；
The navigation circuit plate is arranged in navigational material installation cavity room；The power amplifier circuit board is arranged on power discharging device installation cavity
Interior, make shell wall of the heating element in power amplifier circuit board both facing to radiation shell, in heating element and the shell wall of radiation shell
Between be also filled with using insulating heat-conductive film made of insulating heat-conduction material, with make the heat of heating element can conduct to dissipate
Hot shell.
2. the vehicle-mounted middle control guider of configuration high-fidelity power amplifier according to claim 1, it is characterised in that：
The power discharging device installation chamber includes bottom of chamber wall, and connects the bottom of chamber wall and surround the chamber of power discharging device installation chamber
Leg；
At least one is connected on the chamber leg to stretch to outside power discharging device installation cavity room made of good heat conductive material, from chamber leg
The radiating fin gone out.
3. the vehicle-mounted middle control guider of the configuration high-fidelity power amplifier according to claims 1 or 2, its feature exist
In：
The good heat conductive material is cast aluminium.
4. the vehicle-mounted middle control guider of configuration high-fidelity power amplifier according to claim 1, it is characterised in that：
An at least radiator fan is set in radiation shell, to accelerate the cross-ventilation in power discharging device installation cavity room.
5. the vehicle-mounted middle control guider of configuration high-fidelity power amplifier according to claim 1, it is characterised in that：
Also include the first capping plate of capping power discharging device installation chamber, and the second capping of capping navigational material installation chamber
Plate.
6. the vehicle-mounted middle control guider of configuration high-fidelity power amplifier according to claim 1, it is characterised in that：
The navigational material includes navigation system core component, electrically connects power supply module, the input of the navigation system core component
Output interface component, radio reception component, touch panel unit, video output component and screen drive component；The screen drive component is also electric
It is connected with display screen component；Electric device in each component of navigational material includes the navigation electric device being arranged on navigation circuit plate
Navigate electric device outside with the plate being arranged on outside navigation circuit plate；
The power discharging device includes power amplification core component, and electrically connects the DC-DC voltages of the power amplification core component
Become sending component, preposition amplifier module, microcontroller, protection circuit component and equalizer element；The equalizer element is also electrically connected
Connect navigation system core component；Electric device in each component of power discharging device includes the power amplifier electricity member being arranged in power amplifier circuit board
Part and the plate external work arresting element being arranged on outside power amplifier circuit board.
7. the vehicle-mounted middle control guider of configuration high-fidelity power amplifier according to claim 6, it is characterised in that：
The plate external work arresting element includes non-heating element outside the outer heating element of plate and plate；The outer heating element all edges of plate
The shell wall for radiation shell is set, and is also filled between heater element and the shell wall of radiation shell outside plate using insulating heat-conduction material
Manufactured insulating heat-conductive film, to make the heat of heating element outside plate to conduct to radiation shell.
8. the vehicle-mounted middle control guider of the configuration high-fidelity power amplifier according to claim 1 or 7, its feature exist
In：
The insulating heat-conduction material is insulating heat-conductive silicon.
9. the vehicle-mounted middle control guider of configuration high-fidelity power amplifier according to claim 1, it is characterised in that：
Bulk in the navigational material installation cavity room be it is long 177.4 millimeters, wide 148.3 millimeters and high 54.8 millimeters, or
Person be it is long 178.6 millimeters, wide 100.5 millimeters and high 71.5 millimeters；
Bulk in the power discharging device installation cavity room be it is long 177.4 millimeters, wide 148.3 millimeters and high 54.8 millimeters, or
Person is long 178.6 millimeters, wide 100.5 millimeters and 71.5 millimeters of length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720843771.6U CN206977903U (en) | 2017-07-12 | 2017-07-12 | Configure the vehicle-mounted middle control guider of high-fidelity power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720843771.6U CN206977903U (en) | 2017-07-12 | 2017-07-12 | Configure the vehicle-mounted middle control guider of high-fidelity power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206977903U true CN206977903U (en) | 2018-02-06 |
Family
ID=61401719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720843771.6U Active CN206977903U (en) | 2017-07-12 | 2017-07-12 | Configure the vehicle-mounted middle control guider of high-fidelity power amplifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN206977903U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645885A (en) * | 2017-07-12 | 2018-01-30 | 深圳市驹安保电子科技有限公司 | Configure the vehicle-mounted middle control guider and its heat dissipating method of high-fidelity power amplifier |
-
2017
- 2017-07-12 CN CN201720843771.6U patent/CN206977903U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645885A (en) * | 2017-07-12 | 2018-01-30 | 深圳市驹安保电子科技有限公司 | Configure the vehicle-mounted middle control guider and its heat dissipating method of high-fidelity power amplifier |
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Effective date of registration: 20200220 Address after: 518000 Guangdong Province, Shenzhen City Shilong Baoan District Shiyan Street Community Yihe Road No. 2 Building 1 floor, 2 floor, A-B area, D area 2 floor building -9 Patentee after: SUNWODA ELECTRONICS Co.,Ltd. Address before: Two road 518057 in Guangdong province Shenzhen city Nanshan District District Science and technology science and Technology Park Xili Street No. 25 North Aerospace micromotor building D Building 5 floor B district to the West Patentee before: Shenzhen foal Security Electronic Technology Co., Ltd. |