CN212163602U - Energy-saving clock Bluetooth sound box - Google Patents
Energy-saving clock Bluetooth sound box Download PDFInfo
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- CN212163602U CN212163602U CN202021143290.2U CN202021143290U CN212163602U CN 212163602 U CN212163602 U CN 212163602U CN 202021143290 U CN202021143290 U CN 202021143290U CN 212163602 U CN212163602 U CN 212163602U
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Abstract
The utility model discloses an energy-conserving clock bluetooth speaker, including the casing, set up main control circuit in the casing, battery and loudspeaker of being connected with the main control circuit electricity, housing face exposes and is provided with interface and the button that charges, housing face still is provided with the display part that is used for the display time, interface, button and display part that charge all are connected with the main control circuit electricity, the main control circuit plays through bluetooth wireless reception audio frequency and through loudspeaker, housing face still exposes and is provided with the inductive element who is connected with the main control circuit electricity, inductive element is used for the response to detect the human body and generates inductive signal and send to the main control circuit, the main control circuit switches on the display part according to inductive signal and carries out time display or turn-off the display part. The utility model discloses make clock bluetooth speaker can show the time intelligently or close the demonstration, save the electric energy.
Description
Technical Field
The utility model relates to a bluetooth speaker technical field especially relates to an energy-conserving clock bluetooth speaker.
Background
The existing Bluetooth sound box product of the clock on the market can receive the audio frequency of intelligent electronic equipment such as a mobile phone through Bluetooth to play music on one hand, and can display time to be used as a clock on the other hand. The music playing device is in a Bluetooth mode when playing music, and is in a standby state after the music playing is stopped, and the Bluetooth mode and the standby state both display time.
Because the time display of the clock Bluetooth sound box product in the prior art is normally open, namely no matter whether a user watches the time in front of the clock Bluetooth sound box, the display circuit is always opened to always display the time, the clock Bluetooth sound box is easy to exhaust the electric energy when in standby, and the electric energy is wasted, if the standby power consumption of the existing clock Bluetooth sound box is generally 25 mA-100 mA, and the electric quantity is generally exhausted in less than one week when the sufficient battery capacity of 2000 milliampere is in a standby state.
Therefore, the prior art has yet to be improved.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing deficiencies of the prior art, an object of the present invention is to provide an energy-saving clock bluetooth speaker, which can intelligently display time or close display, and save electric energy.
In order to achieve the purpose, the utility model adopts the following technical proposal:
an energy-saving clock Bluetooth sound box comprises a shell, a main control circuit arranged in the shell, a battery and a loudspeaker which are electrically connected with the main control circuit, wherein a charging interface and a button are exposed on the surface of the shell, a display part for displaying time is also arranged on the surface of the shell, the charging interface, the button and the display part are all electrically connected with the main control circuit, the main control circuit wirelessly receives audio through Bluetooth and plays the audio through the loudspeaker, wherein,
the shell surface still exposes and is provided with the inductive element who is connected with the master control circuit electricity, inductive element is used for the response to detect the human body and generates the sensing signal and send to master control circuit, master control circuit switches on the display portion according to the sensing signal and carries out time display or turn-off the display portion.
The master control circuit comprises a Bluetooth chip, a power amplifier chip electrically connected with the Bluetooth chip and a power supply management unit for supplying power to the Bluetooth chip and the power amplifier chip;
the Bluetooth chip is also electrically connected with the charging interface, the key, the display part and the induction element, the power management unit is also electrically connected with the battery, the charging interface and the induction element, and the power amplifier chip is also electrically connected with the loudspeaker;
the sensing element senses and detects a human body and generates a sensing signal to be sent to the Bluetooth chip, and the Bluetooth chip conducts the display part to display time or switch off according to the existence of the sensing signal.
The Bluetooth chip is AC6956C in model, and the power amplifier chip is MIX2018A in model.
The sensing element is an infrared probe, and the surface of the shell is covered with a focusing lens outside the infrared probe.
The infrared probe is T31 in model and comprises a power supply pin, a grounding pin and an induction signal output pin, wherein the power supply pin is connected with the output end of the power supply management unit;
the bluetooth chip is provided with awakening pin, still be provided with awakening converting circuit between infrared probe and the bluetooth chip, awakening converting circuit includes a triode Q4, resistance R35, R36 and R37, Q4's base parallel resistance R35 and R36 to the inductive signal output pin of connecting infrared probe through resistance R35, resistance R36's other end ground connection, Q4's collecting electrode passes through resistance R37 and connects the awakening pin of bluetooth chip, Q4's projecting pole ground connection.
The power management unit comprises a charge and discharge management chip, the type is LTC4054, the input end of the charge and discharge management chip is connected with the charge interface, and the output end of the charge and discharge management chip is connected with the battery.
The power management unit comprises a battery protection chip, the model is PT8201, and the battery protection chip is electrically connected with the positive electrode and the negative electrode of the battery.
The display part comprises a nixie tube display circuit consisting of a plurality of light emitting diodes.
The main control circuit is further connected with a storage card interface circuit, and a storage card socket is exposed out of the surface of the shell.
The main control circuit is further connected with an MIC circuit, and an MIC hole is exposed on the surface of the shell.
The utility model discloses an energy-conserving clock bluetooth speaker, be connected through the master control circuit electricity that sets up sensing element and casing on housing face, sensing element is used for the response to detect the human body and generates the sensing signal and send to master control circuit, master control circuit switches on the display portion according to the sensing signal and carries out time display or turn-off display portion, like this when clock bluetooth speaker does not play the music when standby state, if sensing element does not detect the human body before clock bluetooth speaker, then turn-off display portion, if sensing element detects the human body before clock bluetooth speaker, then switch on display portion and show current time so that the user looks over the time. The utility model discloses a clock bluetooth speaker can open or close time display intelligently, so greatly reduced the power consumption of battery when standby state in the clock bluetooth speaker, saved the electric energy.
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 view of a first embodiment of the energy-saving clock bluetooth sound box of the present invention;
FIG. 2 is a schematic backside view of the structure of FIG. 1;
FIG. 3 is an exploded view of the structure of FIG. 1;
fig. 4 is a schematic structural view of a second embodiment of the energy-saving clock bluetooth sound box of the present invention;
FIG. 5 is a schematic backside view of the structure of FIG. 4;
FIG. 6 is an exploded view of the structure of FIG. 4;
fig. 7 is a schematic circuit diagram of the first embodiment of the energy-saving clock bluetooth sound box of the present invention;
fig. 8 is a schematic circuit connection diagram of a bluetooth chip in the main control circuit of the present invention;
fig. 9 is a schematic circuit connection diagram of the power amplifier chip in the main control circuit of the present invention;
fig. 10 is a schematic circuit diagram of a second embodiment of the energy-saving clock bluetooth sound box of the present invention;
fig. 11 is a schematic diagram of the connection between the sensing element and the wake-up switching circuit according to the present invention;
FIG. 12 is a schematic circuit diagram of a power management unit in a master control circuit according to the present invention;
fig. 13 is a schematic circuit diagram of the display portion of the present invention;
FIG. 14 is a schematic circuit diagram of a memory card interface circuit in a host circuit according to the present invention;
fig. 15 is a schematic circuit connection diagram of an MIC circuit connected in a main control circuit according to the present invention;
fig. 16 is a schematic circuit diagram of the FM receiver circuit in the main control circuit according to the present invention.
Description of reference numerals:
100-sound box, 1-shell, 11-front shell, 12-rear shell, 13-protective cover, 14-storage card socket, 15-MIC hole, 16-sound outlet mesh, 17-top cover, 2-main control circuit, 21-Bluetooth chip, 22-power amplifier chip, 23-power management unit, 231-charge and discharge management chip, 232-battery protection chip, 233-Bluetooth chip power switch, 24-wake-up conversion circuit, 25-storage card interface circuit, 251-voltage conversion chip, 26-MIC circuit, 27-FM receiving circuit, 3-battery, 4-loudspeaker, 5-charge interface, 6-key, 7-display part, 8-induction element and 9-focusing lens.
Detailed Description
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 the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Please refer to fig. 1 to 6, the utility model provides an energy-saving clock bluetooth speaker 100, including casing 1, set up main control circuit 2 in the casing, battery 3 and loudspeaker 4 be connected with main control circuit 2 electricity, the casing 1 surface exposes and is provided with interface 5 and the button 6 that charges, casing 1 surface still is provided with the display part 7 that is used for the display time, interface 5, button 6 and display part 7 that charge all are connected with main control circuit 2 electricity, main control circuit 2 plays through bluetooth wireless reception audio frequency and through loudspeaker 4. The key 6 includes a plurality of keys for setting or adjustment. Fig. 1 and 4 show two example structures of an energy-saving clock bluetooth sound box 100, and a housing 1 of the two structures includes a front case 11, a rear case 12, and a light-transmitting protective cover 13 for protecting a display 7 from a user. The surface of the shell 1 with the structure of fig. 1 is provided with a sound outlet mesh 16 at the position of the loudspeaker 4, and the energy-saving clock bluetooth sound box 100 with the structure of fig. 4 is further provided with a top cover 17.
The surface of the shell 1 is also exposed and provided with an induction element 8 electrically connected with the main control circuit 2, the induction element 8 is used for inducing and detecting a human body and generating an induction signal to be sent to the main control circuit 2, and the main control circuit 2 conducts time display or turn-off of the display part 7 according to the induction signal.
The display part 7 of the utility model can be LED display or LCD display. The sensing element 8 may be an electronic element such as an infrared sensor or an image sensor or a laser sensor that detects a human body signal.
The utility model discloses a clock bluetooth speaker 100 gets into the bluetooth mode after the start or plays the music through RAM card (SD \ TF). The utility model discloses a clock bluetooth speaker 100 is through the audio frequency of bluetooth wireless reception upper intelligent equipment like smart mobile phone in master control circuit 2 under the bluetooth mode, then plays through loudspeaker 4. And when not playing the music when standby state promptly, the utility model discloses a clock bluetooth speaker 100 gets into the clock mode, under this mode, whether the human body has before this set-up time interval of sensing element 8 detects clock bluetooth speaker 100, if someone is before clock bluetooth speaker 100, then send the human body sensing signal of high level to master control circuit 2, master control circuit 2 receives the high level signal and then judges someone, switches on display portion 7 and shows current time for the user to look over the time; if no one is in front of the clock Bluetooth sound box 100, the sensing element 8 sends a low-level human body sensing signal to the main control circuit 2, the main control circuit 2 judges that no one is present after receiving the low-level signal, the display part 7 is turned off, the power supply of the display part 7 is stopped to enter a human body sensing sleep waiting mode, and when a human body approaches the sound box, the clock Bluetooth sound box is immediately awakened to directly enter a clock mode.
The utility model discloses can not get into human response mode if getting into the bluetooth mode or when playing music through the RAM card after clock bluetooth speaker 100 starts, play music when disconnection bluetooth or RAM card and suspend to reach and predetermine data can jump to the clock mode automatically if after 10 minutes, if still do not carry out any operation and unmanned at product induction range at this moment, then this product can be in scheduled time as 30 seconds after automatic human response dormancy waiting mode that gets into, the electric current consumption can be low to about 20ua/h this moment, reach the effect of power saving. When a human body approaches to the sound box, the voice box is immediately awakened to directly enter a clock mode, and after 10 seconds, the voice box enters a human body induction sleep waiting mode.
The utility model discloses a clock bluetooth speaker 100 is when human response dormancy waiting mode, gets into degree of depth sleep mode in other words, only just awaken up display portion 7 when clock bluetooth speaker 100 has the people before and carry out the time demonstration, can show the time or close the time demonstration intelligently. Therefore, the utility model discloses a clock bluetooth speaker 100 greatly reduced the power consumption of battery 3 when standby state, reached energy-conserving purpose.
The utility model discloses a clock bluetooth speaker 100 is when human response dormancy waiting mode, and the electric current can be maintained within 20uA/h hour to set up 10 seconds time normal bright mode as an example, automatic entering dormant state again after 10 seconds to human awaken up 20 times every day and calculate the continuation of the journey, if: the rechargeable lithium battery with the capacity of 1200mA can stand by for about 2 years without being charged.
Specifically, as shown in fig. 7 to fig. 9, the utility model discloses clock bluetooth speaker 100's master control circuit 2 includes bluetooth chip 21, power amplifier chip 22 of being connected with bluetooth chip 21 electricity to and be bluetooth chip 21, power amplifier chip 22 power supply's power management unit 23.
The bluetooth chip 21 is further electrically connected with the charging interface 5, the key 6, the display part 7 and the inductive element 8, the power management unit 23 is further electrically connected with the battery 3, the charging interface 5 and the inductive element 8, and the power amplifier chip 22 is further electrically connected with the horn 4. The power supply management unit 23 manages charging and discharging of the battery 3.
The sensing element 8 senses and detects a human body and generates a sensing signal to be sent to the Bluetooth chip 21, and the Bluetooth chip 21 conducts the display part 7 to display time or switch off the display part 7 according to the sensing signal.
Preferably, the bluetooth chip 21 model of the embodiment of the present invention is AC6956C, and the power amplifier chip 22 model is MIX 2018A.
The bluetooth chip AC6956C is connected with two crystal oscillators Y1 and Y2 to provide an operating frequency and a bluetooth signal frequency.
As an embodiment, the sensing element 8 of the present invention is an infrared probe, and as shown in fig. 3, the focusing lens 9 is covered on the surface of the housing 1 outside the infrared probe.
Specifically, referring to fig. 10 and 11, the infrared probe has a model T31, and includes a power pin VDD, a ground pin GND and an inductive signal output pin REL, where the power pin VDD is connected to an output terminal BAT _ VCC of the power management unit 23. The output terminal BAT _ VCC of the power management unit 23 outputs the battery voltage.
As shown IN FIG. 8, the Bluetooth chip 21 is provided with a wake-up pin R-KEY for receiving the sensing signal, and the 9 th pin LDO _ IN/PB5 of the Bluetooth chip is used as the wake-up pin R-KEY. Still be provided with wake-up converting circuit 24 between infrared probe and bluetooth chip 21, as shown in fig. 11, wake-up converting circuit 24 includes a triode Q4, resistance R35, R36 and R37, resistance R35 and R36 are connected in parallel to the base of Q4 to the inductive signal output pin REL that connects infrared probe through resistance R35, and the base of Q4 and the inductive signal output pin REL of infrared probe pass through the OUT link and connect.
The other end of the resistor R36 is grounded, the collector of the Q4 is connected with the wake-up pin R-KEY of the Bluetooth chip 21 through a resistor R37, and the emitter of the Q4 is grounded. The wake-up switching circuit 24 is configured to amplify the sensing signal output by the infrared probe, and generate a wake-up signal that can be detected by the bluetooth chip 21.
The infrared probe sends a high level signal to the Q4 after detecting the infrared signal of the human body, and the high level signal is amplified by the Q4 to the R-KEY pin of the Bluetooth chip. And the infrared probe sends a low level signal when not detecting the human body infrared signal.
Preferably, as shown in fig. 12, the utility model discloses clock bluetooth speaker 100's power management unit 23 includes charge and discharge management chip 231, and the model is LTC4054, charge and discharge management chip 231's input is connected interface 5 charges, and the output is connected battery 3. The charge/discharge management chip 231 performs intelligent charge/discharge management of the battery 3. The utility model discloses a power management unit 23 still is provided with bluetooth chip switch 233, opens bluetooth chip switch 233 back, and battery 3 could be for bluetooth chip 21 supplies power. The utility model discloses an interface 5 that charges adopts USB _ MICRO interface, and power output BAT _ VCC is connected jointly to battery 3 and LTC4054 chip. The external power supply is connected with a VDD pin of the LTC4054 through a VUSB pin of the USB _ MICRO, and then is output to the battery 3 through the BAT pin of the LTC4054 to be charged or directly outputs voltage through a power output terminal BAT _ VCC.
Further, as shown in fig. 12, the power management unit 23 further includes a battery protection chip 232, the model of which is PT8201, and the battery protection chip 232 is electrically connected to the positive electrode and the negative electrode of the battery 3. The VDD pin of the PT8201 chip is connected with the positive electrode of the battery 3, namely a BAT _ VCC end, and the GND pin of the PT8201 chip is connected with the negative electrode of the battery 3, namely a B-end. The PT8201 chip can protect the battery 3 from overcharge, overdischarge, overcurrent, short circuit and the like.
As shown in fig. 13, the display portion 7 of the bluetooth clock speaker 100 of the present invention includes a nixie tube display circuit composed of a plurality of light emitting diodes. In this embodiment, an eight-digit seven-segment digital tube display circuit is used, and is connected through the joints J3 and J2, the J3 is connected with the 20 th to 22 th and 25 th to 28 th ports of the bluetooth chip AC6956C as I/O ports, and then the J2 is connected with each light emitting diode. The utility model discloses display portion 7 of fig. 1 has 4 eight seven-segment digital tube and identifications such as "24 h", "AM", "PM", "° C", "%" and has given one of them eight seven-segment digital tube display circuit and the display circuit of identifications such as "24 h", "AM", "PM" in fig. 13.
Preferably, as shown in fig. 14, the main control circuit 2 is further connected with a memory card interface circuit 25, and as shown in fig. 1 and 5, the surface of the housing 1 is further exposed and provided with a memory card socket 14. The memory card interface circuit 25 may be an SD card or a TF card interface circuit. As shown in fig. 14, in this embodiment, a TF card interface circuit is adopted, and a TF card interface voltage conversion circuit is further provided, where the TF card interface voltage conversion circuit is provided with a voltage conversion chip 251, the model of the voltage conversion chip is 251RT9313, which converts the 4.2V voltage of the bluetooth chip into a 3.3V voltage for the TF card to use. Thus, the utility model discloses a clock bluetooth speaker 100 can play music through the storage card.
Preferably, as shown in fig. 15, the main control circuit 2 is further connected with an MIC circuit 26, and as shown in fig. 1, the surface of the housing 1 is also exposed and provided with an MIC hole 15. The MIC circuit 26 is configured to allow the clocked bluetooth speaker 100 to be controlled acoustically.
Preferably, as shown in fig. 16, an FM receiving circuit 27 is further connected to the main control circuit 2. The setting of FM receiving circuit 27 makes the utility model discloses a clock bluetooth speaker 100 has the radio reception function.
The embodiment of the utility model provides an energy-conserving clock bluetooth speaker 100, be connected through 2 electricity of master control circuit in 1 surface setting induction element 8 and casing 1 at the casing, induction element 8 is used for the response to detect the human body and generates induction signal and send to master control circuit 2, master control circuit 2 switches on display portion 7 according to induction signal and carries out time display or turn-off display portion 7, when clock bluetooth speaker 100 does not have the broadcast music to be in standby state like this, if induction element 8 does not detect the human body before clock bluetooth speaker 100, then turn-off display portion 7, if induction element 8 detects the human body 100 before clock bluetooth speaker, then switch on display portion 7 and show current time so that the user looks over the time. The utility model discloses a clock bluetooth speaker 100 can open or close the time display intelligently, so greatly reduced the power consumption of battery 3 when standby state in clock bluetooth speaker 100, saved the electric energy.
The above only for the purpose of clearly illustrating the examples of the present invention, not limiting the scope of the present invention, can't be exhausted to all the embodiments, all the concepts of the present invention, utilize the equivalent structure transformation of the content of the technical solution of the present invention, or directly/indirectly use in other related technical fields and are all included in the protection scope of the present invention.
Claims (10)
1. An energy-saving clock Bluetooth sound box comprises a shell, a main control circuit arranged in the shell, a battery and a loudspeaker which are electrically connected with the main control circuit, wherein a charging interface and a button are exposed on the surface of the shell, a display part for displaying time is also arranged on the surface of the shell, the charging interface, the button and the display part are all electrically connected with the main control circuit, the main control circuit wirelessly receives audio through Bluetooth and plays the audio through the loudspeaker, and the energy-saving clock Bluetooth sound box is characterized in that,
the shell surface still exposes and is provided with the inductive element who is connected with the master control circuit electricity, inductive element is used for the response to detect the human body and generates the sensing signal and send to master control circuit, master control circuit switches on the display portion according to the sensing signal and carries out time display or turn-off the display portion.
2. The energy-saving clock Bluetooth sound box of claim 1, wherein the main control circuit comprises a Bluetooth chip, a power amplifier chip electrically connected with the Bluetooth chip, and a power management unit for supplying power to the Bluetooth chip and the power amplifier chip;
the Bluetooth chip is also electrically connected with the charging interface, the key, the display part and the induction element, the power management unit is also electrically connected with the battery, the charging interface and the induction element, and the power amplifier chip is also electrically connected with the loudspeaker;
the sensing element senses and detects a human body and generates a sensing signal to be sent to the Bluetooth chip, and the Bluetooth chip conducts the display part to display time or switch off according to the existence of the sensing signal.
3. The energy-saving clock Bluetooth sound box of claim 2, wherein the Bluetooth chip is AC6956C, and the power amplifier chip is MIX 2018A.
4. The energy-saving clock Bluetooth sound box of claim 3, wherein the sensing element is an infrared probe, and a focusing lens is covered on the surface of the shell outside the infrared probe.
5. The energy-saving clock Bluetooth sound box of claim 4, wherein the infrared probe is T31 in model, and comprises a power pin, a ground pin and an induction signal output pin, wherein the power pin is connected with the output end of the power management unit;
the bluetooth chip is provided with awakening pin, still be provided with awakening converting circuit between infrared probe and the bluetooth chip, awakening converting circuit includes a triode Q4, resistance R35, R36 and R37, Q4's base parallel resistance R35 and R36 to the inductive signal output pin of connecting infrared probe through resistance R35, resistance R36's other end ground connection, Q4's collecting electrode passes through resistance R37 and connects the awakening pin of bluetooth chip, Q4's projecting pole ground connection.
6. The energy-saving clock Bluetooth sound box of claim 2, wherein the power management unit comprises a charge and discharge management chip with a model of LTC4054, an input end of the charge and discharge management chip is connected to the charge interface, and an output end of the charge and discharge management chip is connected to the battery.
7. The Bluetooth sound box with the energy-saving clock as claimed in claim 6, wherein the power management unit further comprises a battery protection chip with a model number of PT8201, and the battery protection chip is electrically connected with the positive electrode and the negative electrode of the battery.
8. The bluetooth speaker for energy saving clock according to claim 2, wherein the display portion comprises a nixie tube display circuit composed of a plurality of light emitting diodes.
9. The bluetooth sound box of claim 2, wherein the main control circuit is further connected to a memory card interface circuit, and a memory card socket is exposed from the surface of the housing.
10. The energy-saving clock Bluetooth sound box of claim 2, wherein the master control circuit is further connected with an MIC circuit, and an MIC hole is exposed on the surface of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021143290.2U CN212163602U (en) | 2020-06-18 | 2020-06-18 | Energy-saving clock Bluetooth sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021143290.2U CN212163602U (en) | 2020-06-18 | 2020-06-18 | Energy-saving clock Bluetooth sound box |
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| Publication Number | Publication Date |
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| CN212163602U true CN212163602U (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021143290.2U Active CN212163602U (en) | 2020-06-18 | 2020-06-18 | Energy-saving clock Bluetooth sound box |
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| CN (1) | CN212163602U (en) |
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