CN214375914U - Level cooperative conversion circuit and device - Google Patents
Level cooperative conversion circuit and device Download PDFInfo
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- CN214375914U CN214375914U CN202120080521.8U CN202120080521U CN214375914U CN 214375914 U CN214375914 U CN 214375914U CN 202120080521 U CN202120080521 U CN 202120080521U CN 214375914 U CN214375914 U CN 214375914U
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Abstract
The utility model discloses a level cooperative switching circuit and a device, wherein the cooperative switching circuit comprises a Bluetooth sending circuit and a Bluetooth receiving circuit; the Bluetooth transmitting circuit is respectively connected with a transmitting end of the Bluetooth module and a receiving end of the micro-control module, and the Bluetooth receiving circuit is respectively connected with the receiving end of the Bluetooth module and the transmitting end of the micro-control module; the Bluetooth transmitting circuit converts the Bluetooth electric signal into a control electric signal and transmits the control electric signal to the micro control module; the Bluetooth receiving circuit converts the control electric signal into a Bluetooth electric signal and sends the Bluetooth electric signal to the Bluetooth module. The utility model discloses in, convert the bluetooth signal of telecommunication into the control signal of telecommunication through bluetooth transmitting circuit to with control signal of telecommunication send to little control module, bluetooth receiving circuit converts the control signal of telecommunication into the bluetooth signal of telecommunication, and with bluetooth signal of telecommunication send to bluetooth module, realize that level between bluetooth module and the little control module is in coordination with conversion and the effectual wasting of resources of avoiding.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a level is converting circuit and device in coordination.
Background
In circuit design, communication is often required to be carried out between the MCU and the Bluetooth module so as to complete instruction sending and receiving to realize various functions, but voltages used in the MCU and the Bluetooth module are not necessarily the same, the MCU and the Bluetooth module cannot be normally cooperated when the voltages are different, and level conversion is required to be carried out at the moment so that the MCU and the Bluetooth module reach the same voltage.
Among the level conversion schemes that are common today are low dropout linear regulation and DC-DC buck-boost. The MCU and the Bluetooth module circuit which only need to transmit and receive communication commands are low-current circuits, large current is not needed, and the two schemes can cause resource waste of the level cooperative switching circuit and the device. How to provide a simple level conversion circuit to realize level conversion and avoid resource waste becomes an urgent problem to be solved.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a level cooperative switching circuit and device, which solves the technical problem of the prior art that the resource waste cannot be avoided under the condition of level switching.
In order to achieve the above object, the present invention provides a level cooperative conversion circuit, the circuit includes: the Bluetooth receiving circuit is connected with the Bluetooth transmitting circuit;
the Bluetooth transmitting circuit is respectively connected with a transmitting end of a Bluetooth module and a receiving end of a micro-control module, and the Bluetooth receiving circuit is respectively connected with the receiving end of the Bluetooth module and the transmitting end of the micro-control module;
the Bluetooth sending circuit is used for converting a Bluetooth electric signal into a control electric signal and sending the control electric signal to the micro control module;
the Bluetooth receiving circuit is used for converting the control electric signal into the Bluetooth electric signal and sending the Bluetooth electric signal to the Bluetooth module.
Optionally, the level coordination conversion circuit further includes: a first power supply and a second power supply;
the first power supply is connected with the Bluetooth module, and the second power supply is connected with the micro-control module;
the first power supply is used for supplying power to the Bluetooth module;
and the second power supply is used for supplying power to the micro control module.
Optionally, the bluetooth transmitting circuit includes: the circuit comprises a first resistor, a second resistor, a third resistor and a triode;
the first end of the first resistor is connected with the first power supply, the second end of the first resistor is connected with the base electrode of the triode, the first end of the second resistor is connected with the second power supply, the second end of the second resistor is respectively connected with the collector electrode of the triode and the first end of the third resistor, the emitting electrode of the triode is connected with the transmitting end of the Bluetooth module, and the second end of the third resistor is connected with the receiving end of the micro control module.
Optionally, the first power supply is further configured to provide a voltage to a base of the triode through the first resistor;
the second power supply is also used for providing voltage for the collector electrode of the triode through the second resistor;
the second power supply is also used for providing voltage for the power supply through the third resistor.
Optionally, the bluetooth transmitting circuit is further configured to, when a transmitting end of the bluetooth module is in a low level state, enable the triode to be in a conducting state, enable the second power source to flow to the bluetooth module through the second resistor and the triode, and enable a second end of the third resistor to be in the low level state to provide a low level signal for the micro control module;
the bluetooth sending circuit is further configured to enable the triode to be in a cut-off state when the bluetooth module sending end is in a high level state, and the second power supply provides a high level signal for the micro control module through the third resistor.
Optionally, the bluetooth receiving circuit includes: a fourth resistor;
the first end of the fourth resistor is connected with the sending end of the micro control module, and the second end of the fourth resistor is connected with the receiving end of the Bluetooth module.
Optionally, the bluetooth receiving circuit is further configured to step down through the fourth resistor to provide a high level signal for the bluetooth module when a transmitting end of the microcontroller module is in a high level state;
the Bluetooth receiving circuit is further configured to provide a low level signal for the Bluetooth module through the fourth resistor when the transmitting end of the micro control module is in a high and low level state.
In order to achieve the above object, the present invention further provides a level cooperative conversion apparatus, which includes the above circuit.
The utility model provides a level cooperative switching circuit and a device, wherein the cooperative switching circuit comprises a Bluetooth sending circuit and a Bluetooth receiving circuit; the Bluetooth transmitting circuit is respectively connected with a transmitting end of the Bluetooth module and a receiving end of the micro-control module, and the Bluetooth receiving circuit is respectively connected with the receiving end of the Bluetooth module and the transmitting end of the micro-control module; the Bluetooth transmitting circuit converts the Bluetooth electric signal into a control electric signal and transmits the control electric signal to the micro control module; the Bluetooth receiving circuit converts the control electric signal into a Bluetooth electric signal and sends the Bluetooth electric signal to the Bluetooth module. The utility model discloses in, convert the bluetooth signal of telecommunication into the control signal of telecommunication through bluetooth transmitting circuit to with control signal of telecommunication send to little control module, bluetooth receiving circuit converts the control signal of telecommunication into the bluetooth signal of telecommunication, and with bluetooth signal of telecommunication send to bluetooth module, realize that level between bluetooth module and the little control module is in coordination with conversion and the effectual wasting of resources of avoiding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a level cooperative conversion circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a level cooperative conversion circuit according to an embodiment of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a structure of a level cooperative conversion circuit according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a circuit of a level cooperative conversion circuit according to an embodiment of the present invention, which provides a first embodiment of a level cooperative conversion circuit according to the present invention.
As shown in fig. 1, in the present embodiment, the level coordination conversion circuit includes: a bluetooth transmitting circuit 10 and a bluetooth receiving circuit 20;
the bluetooth transmitting circuit 10 is connected to a first transmitting terminal TX1 of the bluetooth module BLE and a receiving terminal of the MCU, and the bluetooth receiving circuit 20 is connected to the receiving terminal of the bluetooth module BLE and a second transmitting terminal TX2 of the MCU.
It should be noted that the level cooperative conversion circuit is a circuit that converts signals sent by a sending device or module between signals with different levels to obtain signals suitable for a signal receiving device or module to receive. For example, there are many different modules on the multifunctional operation panel, the voltages used by the modules are different, and when data is transmitted between the modules with different voltages, voltage conversion is required to be performed on the transmitted signals, so as to avoid the influence on each module caused by too high or too low voltage.
It should be understood that the bluetooth transmission circuit 10 is a circuit for transmitting bluetooth electric signals. The bluetooth transmitting circuit 10 can convert the level of the bluetooth electric signal, and the micro control module MCU can receive the electric signal after level conversion, thereby avoiding the influence of different voltages on the transmission of the signal. Similarly, the bluetooth receiving circuit 20 is a circuit for receiving a control electrical signal sent by the MCU to bluetooth. Bluetooth receiving circuit 20 can convert the level of the control signal of telecommunication, and bluetooth module BLE can receive the control signal of telecommunication of advancing the step-down, avoids the voltage of the signal of telecommunication too high to cause the influence to bluetooth module BLE's performance.
In a specific implementation process, the bluetooth transmitting circuit 10 may receive a bluetooth electrical signal transmitted by the bluetooth module BLE, convert the bluetooth electrical signal into a control electrical signal, and transmit the control electrical signal to the MCU. Wherein the level of control signal of telecommunication is the level signal that control module normally deems, and the high level signal that little control module MCU deems for example is 3.5V ~ 5V, and the voltage that bluetooth equipment normally used probably is 3.3V, and under this condition, bluetooth equipment can't carry out the level to the signal of bluetooth equipment output for little control module MCU provides the high point level signal and draws high. The bluetooth receiving circuit 20 converts the control electrical signal into the bluetooth electrical signal, and sends the bluetooth electrical signal to the bluetooth module BLE. Wherein the level of the bluetooth signal is the level asserted by the bluetooth signal. As in the above case, the high level signal generated by the microcontroller may be a control electrical signal of 5V, while the normal operating voltage of the bluetooth module BLE may be 3.3V, and the control electrical signal of 5V may affect part of the performance of the bluetooth module BLE, and the control signal needs to be stepped down by the bluetooth receiving circuit 20.
In the present embodiment, a level cooperative conversion circuit is provided, which includes a bluetooth transmitting circuit 10 and a bluetooth receiving circuit 20; the bluetooth transmitting circuit 10 is respectively connected with a first transmitting end TX1 of the bluetooth module BLE and a receiving end of the micro control module MCU, and the bluetooth receiving circuit 20 is respectively connected with the receiving end of the bluetooth module BLE and a second transmitting end TX2 of the micro control module MCU; the Bluetooth transmitting circuit 10 converts the Bluetooth electric signal into a control electric signal and transmits the control electric signal to the MCU; the bluetooth receiving circuit 20 converts the control electrical signal into a bluetooth electrical signal, and transmits the bluetooth electrical signal to the bluetooth module BLE. The utility model discloses in, convert the bluetooth signal of telecommunication into the control signal of telecommunication through bluetooth transmitting circuit 10 to with control signal of telecommunication send to little control module MCU, bluetooth receiving circuit 20 converts the control signal of telecommunication into the bluetooth signal of telecommunication, and with bluetooth signal of telecommunication send to bluetooth module BLE, realize that level between bluetooth module BLE and the little control module MCU changes in coordination and the effectual wasting of resources of avoiding.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a structure of a level cooperative conversion circuit according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a circuit of a level cooperative conversion circuit according to an embodiment of the present invention, which is provided based on a first embodiment of the level cooperative conversion circuit according to a second embodiment of the present invention.
In this embodiment, the level coordination conversion circuit further includes: a first power supply VCC1 and a second power supply VCC 2.
The first power supply VCC1 is connected with the Bluetooth module BLE, and the second power supply VCC2 is connected with the MCU.
It should be noted that the first power source VCC1 is a power source for supplying power to the bluetooth module BLE, and the second power source VCC2 is a power source for supplying power to the MCU. Since the functions or functions of the bluetooth module BLE and the MCU are different, the voltage of the first power VCC1 is different from the voltage of the second power VCC 2. For example, one end of the micro control module MCU is often directly connected to a power supply through devices such as a charger and a current condenser, the micro control module MCU is powered by the power supply, and the other end of the micro control module MCU is grounded to GND. The bluetooth module BLE may be powered by the module connected thereto. One end of the Bluetooth module BLE is connected with a first power supply VCC1, and the other end is grounded GND. The micro control module MCU needs to control a plurality of modules to work cooperatively, so that a plurality of voltages may be required inside the micro control module MCU, for example, a part of the main board may be powered by 24V voltage, and output 5V voltage to other functional modules.
In this embodiment, the bluetooth transmission circuit 10 includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3 and a triode Q;
the first end of the first resistor R1 is connected to the first power VCC1, the second end of the first resistor R1 is connected to the base of the transistor Q, the first end of the second resistor R2 is connected to the second power VCC2, the second end of the second resistor R2 is connected to the collector of the transistor Q and the first end of the third resistor R3, the emitter of the transistor Q is connected to the first transmitting end TX1 of the bluetooth module BLE, and the second end of the third resistor R3 is connected to the receiving end of the MCU.
It should be noted that the first resistor R1 is connected to the first power source VCC1, and the first resistor R1 may step down the voltage of the first power source VCC1 to provide an input current to the base of the transistor Q. The second power VCC2 may be connected to the emitter of the transistor Q through a second resistor R2, and may provide an input current to the emitter of the transistor Q through a second resistor R2. Of course, the second power VCC2 is also connected to the receiving terminal of the MCU through the second resistor R2 and the third resistor R3. The second power VCC2 may provide a high level signal to the receiving terminal of the MCU through the second resistor R2 and the third resistor R3. An emitter of the triode Q is connected with the first transmitting terminal TX1 of the bluetooth module BLE, and whether the triode Q is conducted is determined according to a level signal provided by the first transmitting terminal TX1 of the bluetooth module BLE.
It should be understood that, in this embodiment, the first power source VCC1 is further configured to provide a voltage to the base of the transistor Q through the first resistor R1; the second power source VCC2 is further configured to provide a voltage to the collector of the transistor Q through the second resistor R2; the second power source VCC2 is further configured to provide the voltage through the third resistor R3.
The bluetooth transmitting circuit 10 may be configured to, when the first transmitting terminal TX1 of the bluetooth module BLE is in a low level state, turn on the transistor Q, allow the second power source VCC2 to flow to the bluetooth module BLE through the second resistor R2 and the transistor Q, and allow the second terminal of the third resistor R3 to be in a low level state to provide a low level signal for the MCU. The bluetooth transmitting circuit 10 may be configured to, when the first transmitting terminal TX1 of the bluetooth module BLE is in a high level state, turn off the transistor Q, and provide the high level signal to the MCU through the third resistor R3 by the second power source VCC 2.
In a specific implementation, if the first transmitting terminal TX1 of the bluetooth module BLE sends a high level signal, the emitter of the transistor Q is connected to the first transmitting terminal TX1 of the bluetooth module BLE and is also in a high level state, at this time, the transistor Q is in a cut-off state, the second terminal power supply provides the high level signal to the receiving terminal of the MCU through the second resistor R2 and the third resistor R3, and the high level signal is provided by the second power supply VCC2, and the second power supply VCC2 also provides voltage to the MCU at the same time, so that the second power supply VCC2 completes level coordination conversion when providing the high level signal to the MCU. If the first transmitting terminal TX1 of bluetooth module BLE sends a low level signal, the triode Q is in a conducting state according to the characteristics of the triode Q, the voltage of the second power VCC2 flows to the first transmitting terminal TX1 of the bluetooth module BLE through the emitting electrode of the triode Q, at this time, the second power VCC2 cannot provide a high level signal for the receiving terminal of the MCU through the second resistor R2 and the third resistor R3, and the receiving terminal of the MCU is in a low level state at this time.
In this embodiment, the bluetooth receiving circuit 20 includes: a fourth resistor R4;
a first end of the fourth resistor R4 is connected to a second transmitting end TX2 of the MCU, and a second end of the fourth resistor R4 is connected to a receiving end of the bluetooth module BLE.
It should be noted that the fourth resistor R4 may be a voltage dropping resistor. The first end of fourth resistance R4 is connected with the second sending end TX2 of little control module MCU, and the second end is connected with the receiving terminal of bluetooth module BLE, and fourth resistance R4 can step down the control signal of telecommunication that little control module MCU sent to make the control signal of telecommunication after stepping down be in the voltage range of bluetooth module BLE work. For example, the microcontroller module MCU outputs a 5V high level signal, the fourth resistor R4 may reduce the voltage of the high level signal to below 3.3V, and the bluetooth module BLE receives the high level signal after voltage reduction, which may not only receive the control electrical signal sent by the microcontroller module MCU, but also not affect the performance of the bluetooth module BLE and the control electrical signal.
It should be understood that, in this embodiment, the bluetooth receiving circuit 20 may step down through the fourth resistor R4 to provide a high level signal for the bluetooth module BLE when the second transmitting terminal TX2 of the MCU is in a high level state; the bluetooth receiving circuit 20 may provide a low level signal for the bluetooth module BLE through the fourth resistor R4 when the second transmitting terminal TX2 of the MCU is in a high-low level state.
In specific implementation, when the MCU sends the control electrical signal as a high-level signal, the high-level signal passes through the voltage reduction effect of the fourth resistor R4, and the voltage of the high-level signal is cooperatively converted to obtain a high-level signal within the range determined by the bluetooth module BLE, and the bluetooth module BLE receives the high-level signal and performs subsequent processing according to the high-level signal. When the micro control module MCU sends the control electrical signal as a low level signal, the low level signal passes through the fourth resistor R4 and is still output at the receiving end of the bluetooth module BLE.
In the present embodiment, a level cooperative conversion circuit is provided, which includes a bluetooth transmitting circuit 10 and a bluetooth receiving circuit 20; the bluetooth transmitting circuit 10 is respectively connected with a first transmitting end TX1 of the bluetooth module BLE and a receiving end of the micro control module MCU, and the bluetooth receiving circuit 20 is respectively connected with the receiving end of the bluetooth module BLE and a second transmitting end TX2 of the micro control module MCU; the Bluetooth transmitting circuit 10 converts the Bluetooth electric signal into a control electric signal and transmits the control electric signal to the MCU; the bluetooth receiving circuit 20 converts the control electrical signal into a bluetooth electrical signal, and transmits the bluetooth electrical signal to the bluetooth module BLE. The utility model discloses in, convert the bluetooth signal of telecommunication into the control signal of telecommunication through bluetooth transmitting circuit 10 to with the control signal of telecommunication through second power VCC2 transmission to little control module MCU, bluetooth receiving circuit 20 converts the control signal of telecommunication into the bluetooth signal of telecommunication, and convert the level through the fourth resistance and send the bluetooth signal of telecommunication to bluetooth module, realize level between bluetooth module BLE and the little control module BLE conversion in coordination and the effectual wasting of resources of avoiding.
In order to achieve the above object, the present invention further provides a level cooperative conversion apparatus, which includes the circuit as described above. The specific structure of the circuit refers to the above embodiments, and since the present device adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A level cooperative conversion circuit, comprising: the Bluetooth receiving circuit is connected with the Bluetooth transmitting circuit;
the Bluetooth transmitting circuit is respectively connected with a transmitting end of a Bluetooth module and a receiving end of a micro-control module, and the Bluetooth receiving circuit is respectively connected with the receiving end of the Bluetooth module and the transmitting end of the micro-control module;
the Bluetooth sending circuit is used for converting a Bluetooth electric signal into a control electric signal and sending the control electric signal to the micro control module;
the Bluetooth receiving circuit is used for converting the control electric signal into the Bluetooth electric signal and sending the Bluetooth electric signal to the Bluetooth module.
2. The circuit of claim 1, wherein the level-coordinated conversion circuit further comprises: a first power supply and a second power supply;
the first power supply is connected with the Bluetooth module, and the second power supply is connected with the micro-control module;
the first power supply is used for supplying power to the Bluetooth module;
and the second power supply is used for supplying power to the micro control module.
3. The circuit of claim 2, wherein the bluetooth transmit circuit comprises: the circuit comprises a first resistor, a second resistor, a third resistor and a triode;
the first end of the first resistor is connected with the first power supply, the second end of the first resistor is connected with the base electrode of the triode, the first end of the second resistor is connected with the second power supply, the second end of the second resistor is respectively connected with the collector electrode of the triode and the first end of the third resistor, the emitting electrode of the triode is connected with the transmitting end of the Bluetooth module, and the second end of the third resistor is connected with the receiving end of the micro control module.
4. The circuit of claim 3, wherein the first power supply is further configured to provide a voltage to a base of the transistor through the first resistor;
the second power supply is also used for providing voltage for the collector electrode of the triode through the second resistor;
the second power supply is also used for providing voltage for the power supply through the third resistor.
5. The circuit of claim 4, wherein the bluetooth transmitting circuit is further configured to enable the transistor to be in a conducting state when a transmitting end of the bluetooth module is in a low state, the second power flows to the bluetooth module through the second resistor and the transistor, and a second end of the third resistor is in the low state to provide a low signal to the microcontroller module;
the bluetooth sending circuit is further configured to enable the triode to be in a cut-off state when the bluetooth module sending end is in a high level state, and the second power supply provides a high level signal for the micro control module through the third resistor.
6. The circuit of claim 5, wherein the Bluetooth receiving circuit comprises: a fourth resistor;
the first end of the fourth resistor is connected with the sending end of the micro control module, and the second end of the fourth resistor is connected with the receiving end of the Bluetooth module.
7. The circuit of claim 6, wherein the bluetooth receiving circuit is further configured to step down through the fourth resistor to provide a high level signal to the bluetooth module when a transmitting end of the micro control module is in a high level state;
the Bluetooth receiving circuit is further configured to provide a low level signal for the Bluetooth module through the fourth resistor when the transmitting end of the micro control module is in a high and low level state.
8. A level co-operating converting device, characterized in that the device comprises a circuit as claimed in any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120080521.8U CN214375914U (en) | 2021-01-12 | 2021-01-12 | Level cooperative conversion circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120080521.8U CN214375914U (en) | 2021-01-12 | 2021-01-12 | Level cooperative conversion circuit and device |
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| CN214375914U true CN214375914U (en) | 2021-10-08 |
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| CN202120080521.8U Active CN214375914U (en) | 2021-01-12 | 2021-01-12 | Level cooperative conversion circuit and device |
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| CN (1) | CN214375914U (en) |
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- 2021-01-12 CN CN202120080521.8U patent/CN214375914U/en active Active
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Address after: 528311 No. 1, DUYE South Road, duning Industrial Zone, Bijiang community, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Shangyan Electronic Technology Co.,Ltd. Address before: 528311 Shunde Innovation Industrial Park No. 25 Sanle East Road, Shunjiang Residential Committee, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee before: Guangdong Shangyan Electronic Technology Co.,Ltd. |
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