A CD player with human body sensing function

Abstract

The utility model relates to a CD player with human body induction function, including CD play subassembly and human body induction component, human body induction component includes ultrasonic wave radar module and main control circuit, the ultrasonic wave radar module includes ultrasonic wave radar probe and ultrasonic wave radar drive interface circuit, when the human body is located in the effective distance range of ultrasonic wave signal, the ultrasonic wave radar drive interface circuit sends the interrupt signal to main control circuit, main control circuit drives CD play module and plays music to work. Through the ultrasonic wave radar module realizes human body induction, when personnel appears in the predetermined range, the ultrasonic wave radar module detects the human body and sends digital level signal to main control circuit, makes main control circuit control CD play module and plays music or predetermined content, realizes the function that music or broadcast content is automatically played when personnel passes, saves the energy.

Description

Technical Field

[0001] This utility model relates to the field of CD player technology, specifically to a CD player with human body sensing function. Background Technology

[0002] A CD player, also known as a laser disc player or CD player, is an intelligent, high-fidelity stereo audio device controlled by a microcomputer. It employs advanced laser technology, digital technology, computer technology, and various new components, offering advantages such as high-density recording, long playback time (60-75 minutes), ease of operation, and fast track selection. CD players can realistically reproduce recorded content with clear layers and a sense of presence. Their high audio specifications, wide dynamic range, broad frequency response, and low distortion have made them widely popular.

[0003] In public places such as train stations and shopping malls, when broadcast announcements with predetermined content need to be played on a loop, they should only be played when people are passing by and should stop playing when no one is passing by to save energy. Existing CD players require manual control to turn music on and off, and cannot automatically play music when people are passing by, as they cannot detect whether people are in a specific location. Utility Model Content

[0004] In view of this, it is necessary to provide a CD player with human body sensing function that can recognize human body and automatically play music.

[0005] A CD player with human body sensing function includes a chassis housing, within which a CD playback component and a human body sensing component are housed. The CD playback component includes a CD playback mechanism and multiple function buttons for playing music or songs recorded on CD discs. The human body sensing component includes an ultrasonic radar module and a main control circuit. The ultrasonic radar module includes an ultrasonic radar probe and an ultrasonic radar drive interface circuit. The ultrasonic radar probe is installed through the side wall of the chassis housing. The ultrasonic radar drive interface circuit is electrically connected to the ultrasonic radar probe. The ultrasonic radar drive interface circuit is used to drive the ultrasonic radar probe to emit ultrasonic signals, receive echo signals, and amplify, filter, and shape the echo signals, and output digital level signals to the interrupt pin of the main control circuit.

[0006] Preferably, the chassis housing is provided with a PCB main board and a PCB sub-board. The main control circuit and the ultrasonic radar drive interface circuit are located on the PCB main board. The main control circuit is electrically connected to the ultrasonic radar drive interface circuit to receive the digital level signal transmitted by the ultrasonic radar drive interface circuit.

[0007] Preferably, the human body sensing component further includes a touch screen, which is electrically connected to the main control circuit and is used to set the effective distance range of the ultrasonic signal.

[0008] Preferably, the chassis housing includes a top cover, a middle frame, and a bottom cover. The middle frame is located between the top cover and the bottom cover, and has side walls of a predetermined height. The top cover and the bottom cover are fastened to the side walls of the middle frame. The top cover is an upwardly convex arc shape, and the top cover and the middle frame form a player compartment for holding CD discs. The middle frame is located at the top of the bottom cover, and the middle frame and the bottom cover form a closed receiving space. The receiving space contains a PCB circuit board and the CD player mechanism.

[0009] Preferably, the top cover is rotatably connected to the top edge of the side wall of the middle frame, the CD player mechanism is attached to the bottom surface of the middle frame, and the CD player mechanism is used to drive the CD disc to rotate and read the music information recorded on the CD disc.

[0010] Preferably, the side wall of the middle frame has multiple mounting through holes, in which the ultrasonic radar probe, volume adjustment knob and multiple external interfaces are respectively installed. The multiple external interfaces include fiber optic interfaces, coaxial interfaces and XLR XLR interfaces. The multiple external interfaces are used to connect to external power amplifier devices and provide digital audio signals or analog audio signals to the external power amplifier devices.

[0011] Preferably, the touch screen is mounted on the top cover, and multiple function buttons are mounted around the touch screen. The PCB circuit sub-board is mounted on the inside of the top cover, and the touch screen and each of the function buttons are electrically connected to the PCB circuit sub-board. The PCB circuit sub-board is connected to the PCB circuit main board via a ribbon cable.

[0012] Preferably, the plurality of function buttons are located on the outer surface of the upper cover, and the plurality of function buttons are used to control the music playback function of the CD disc; the touch screen is used to receive the human body sensing setting parameter value of the ultrasonic radar module, and to display the working status of the player or the duration of the playback track when playing music.

[0013] Preferably, the main control circuit includes a CD player servo and audio codec system chip, which is connected to the CD player mechanism via a motor drive circuit. The CD player servo and audio codec system chip is used to drive the CD player mechanism to rotate and decode the received digital music signals.

[0014] Preferably, the main control circuit further includes a stereo headphone amplifier chip, the input terminal of which is connected to the CD player servo and audio codec system chip, and the output terminal of which is connected to stereo headphones.

[0015] In the aforementioned CD player with human body sensing function, the ultrasonic radar module realizes human body sensing. When a person appears within a predetermined range, the ultrasonic radar module detects the person and sends a digital level signal to the main control circuit, causing the main control circuit to control the CD playback module to play music or predetermined content. This achieves automatic playback of music or broadcast content when someone passes by, saving energy. The device structure of this utility model is simple, easy to implement, low in cost, and easy to promote. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a CD player with human body sensing function according to an embodiment of the present invention.

[0017] Figure 2 This is an exploded view of the structure of a CD player with human body sensing function according to an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the circuit structure of a CD player with human body sensing function according to an embodiment of the present invention. Detailed Implementation

[0019] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0020] Please see Figure 1 and Figure 2 This illustration shows a CD player 100 with human body sensing function, including a chassis housing 10, within which a CD playback component and a human body sensing component are housed. The CD playback component includes a CD playback mechanism 21 and multiple function buttons 22, used to play music or songs recorded on the CD disc 200. The human body sensing component includes an ultrasonic radar module and a main control circuit. The ultrasonic radar module includes an ultrasonic radar probe 26 and an ultrasonic radar drive interface circuit 27. The ultrasonic radar probe 26 is installed through the side wall of the housing 10. The ultrasonic radar drive interface circuit 27 is electrically connected to the ultrasonic radar probe 26. The ultrasonic radar drive interface circuit 27 is used to drive the ultrasonic radar probe 26 to emit ultrasonic signals, receive echo signals, and amplify, filter, and shape the echo signals, and output digital level signals to the interrupt pin of the main control circuit.

[0021] Specifically, the ultrasonic radar module is used to scan moving targets, sense the presence or absence of a human body, and send corresponding signals to the CD player to perform operations such as music playback or pause.

[0022] Preferably, the chassis housing 10 is provided with a PCB circuit main board 25 and a PCB circuit sub-board 24. The main control circuit and the ultrasonic radar drive interface circuit 27 are located on the PCB circuit main board 25. The main control circuit is electrically connected to the ultrasonic radar drive interface circuit 27 to receive the digital level signal transmitted by the ultrasonic radar drive interface circuit 27.

[0023] Specifically, when someone approaches the CD player, the ultrasonic radar probe 26 receives an echo signal. The ultrasonic radar drive interface circuit 27 amplifies, filters, and shapes the received echo signal. When the distance between the person and the CD player is calculated to be within a predetermined distance, an interrupt signal is sent to the main control circuit.

[0024] Preferably, the human body sensing component further includes a touch screen 23, which is electrically connected to the main control circuit and is used to set the effective distance range of the ultrasonic signal.

[0025] Specifically, the detection range of ultrasonic radar is typically 1 to 15 meters. The effective detection range can be set according to the environment of the place where the CD player is placed. When a person appears within the predetermined range, the main control circuit activates the CD playback component.

[0026] The touch display enters parameter setting mode, sets and saves the effective range value of the ultrasonic radar signal. When the ultrasonic radar drive interface circuit 27 detects that the distance to the human body is within the predetermined range through the received report signal, it sends a digital level signal to the main control circuit.

[0027] Specifically, in this embodiment, the effective range of the ultrasonic signal is 1-3 meters. When a human body is within the effective range of the ultrasonic signal, the ultrasonic radar drive interface circuit 27 sends an interrupt signal to the main control circuit. The main control circuit then drives the CD playback module to work and play music. This enables the CD player to play music or pre-defined content, such as advertisements or broadcast announcements, when it detects someone approaching.

[0028] Specifically, the ultrasonic radar module adopts the MS24-2020D12M4 radar sensor module, which operates at a frequency of 24~24.25GHz and has a detection angle of 120 degrees.

[0029] Preferably, the chassis housing 10 includes an upper cover 11, a middle frame 12, and a bottom cover 13. The middle frame 12 is disposed between the upper cover 11 and the bottom cover 13. The middle frame 12 has a side wall of a predetermined height. The upper cover 11 and the bottom cover 13 are fastened to the side wall of the middle frame 12. The upper cover 11 is an upwardly convex arc shape. The upper cover 11 and the middle frame 12 form a player compartment for placing CD discs 200. The middle frame 12 is located at the top of the bottom cover 13. The middle frame 12 and the bottom cover 13 form a closed receiving space. The receiving space contains a PCB circuit board and the CD player mechanism 21.

[0030] Preferably, the upper cover 11 is rotatably connected to the top edge of the side wall of the middle frame 12, and the CD player mechanism 21 is attached to the bottom surface of the middle frame 12. The CD player mechanism 21 is used to drive the CD disc 200 to rotate and read the music information recorded on the CD disc 200.

[0031] Preferably, the sidewall of the middle frame 12 has multiple mounting through holes, in which the ultrasonic radar probe 26, a volume adjustment knob, and multiple external interfaces are respectively installed. The multiple external interfaces include fiber optic interfaces, coaxial interfaces, and XLR XLR interfaces. The multiple external interfaces are used to connect to external power amplifier devices and provide digital audio signals or analog audio signals to the external power amplifier devices.

[0032] Preferably, the touch display screen 23 is mounted on the upper cover 11, and a plurality of function buttons 22 are mounted around the touch display screen 23. The PCB circuit sub-board 24 is mounted on the inner side of the upper cover 11, and the touch display screen 23 and each of the function buttons 22 are electrically connected to the PCB circuit sub-board 24. The PCB circuit sub-board 24 is connected to the PCB circuit main board 25 via a ribbon cable.

[0033] Specifically, the ribbon cable passes through the middle frame 12, and the two ends of the ribbon cable are respectively connected to the PCB circuit sub-board 24 and the PCB circuit main board 25, connecting the touch screen 23 and each of the function buttons 22 to the control circuit.

[0034] The PCB circuit motherboard 25 is also equipped with a Bluetooth module and a WIFI module to enable wireless connection between Bluetooth speakers and smart speakers, so as to enable music playback.

[0035] Specifically, in this embodiment, the CD player does not have a built-in speaker; instead, it connects to an external speaker or amplifier via wired or wireless means to play music. In other embodiments, the CD player may have one or more built-in speakers to achieve music playback functionality.

[0036] Preferably, a plurality of function buttons 22 are disposed on the outer surface of the upper cover 11, and the plurality of function buttons 22 are used to control the music playback function of the CD disc 200; the touch screen 23 is used to receive the human body sensing setting parameter value of the ultrasonic radar module, and to display the working status of the player or the duration of the playback track when playing music.

[0037] Specifically, the multiple function buttons 22 include, but are not limited to, a power button, a previous track button, a play / pause button, a next track button, a stop button, and a mode switch button. The mode switch button is used to control the playback mode of the CD player, such as sequential playback, loop playback, or random playback.

[0038] Preferably, the PCB circuit board is further provided with a power management module, which is used to provide working power for the CD player and is connected to a rechargeable battery.

[0039] Specifically, the power management module is connected to an external power source via a USB interface or a TYPE-C interface to enable the charging process of the rechargeable battery.

[0040] Preferably, the main control circuit includes a CD player servo and audio codec system chip, which is connected to the CD player mechanism 21 via a motor drive circuit. The CD player servo and audio codec system chip is used to drive the CD player mechanism 21 to rotate and decode the received music digital signals.

[0041] Preferably, the main control circuit further includes a stereo headphone amplifier, the input of which is connected to the CD player servo and audio codec system chip, and the output of which is connected to stereo headphones.

[0042] Specifically, please refer to Figure 3 This diagram illustrates the device and circuit connection structure of the CD player 100 with human body sensing function in this embodiment. The CD player servo and audio codec system chip uses the SC6137D audio decoding chip, the motor drive circuit uses the YD5901 four-channel motor drive chip, the CD player mechanism 21 uses the M93BG6 chip, and the stereo headphone amplifier uses the HT97226 headphone amplifier chip. The CD player servo and audio codec system chip has a memory chip for storing the setting parameter values ​​of the CD player.

[0043] The ultrasonic radar module MS24-2020D12M4 scans for moving targets. When it detects the presence of a human body, it sends an interrupt signal to the CD player servo and audio codec system chip. The CD player servo and audio codec system chip drives the CD player mechanism 21 to rotate the CD disc 200 through the motor drive circuit and reads the music data signal. Then, the decoded music signal is sent to stereo headphones or speakers through the stereo headphone amplifier.

[0044] In the aforementioned CD player 100 with human body sensing function, human body sensing is achieved through the ultrasonic radar module. When a person appears within a predetermined range, the ultrasonic radar module detects the person and sends a digital level signal to the main control circuit, causing the main control circuit to control the CD playback module to play music or predetermined content. This achieves automatic playback of music or broadcast content when someone passes by, saving energy. The device structure of this utility model is simple, easy to implement, low in cost, and easy to promote.

[0045] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. A CD player with human body sensing function, characterized in that, The system includes a chassis housing, within which a CD playback assembly and a human body sensor assembly are housed. The CD playback component includes a CD playback mechanism and multiple function buttons for playing music or songs recorded on CD discs. The human body sensing component includes an ultrasonic radar module and a main control circuit. The ultrasonic radar module includes an ultrasonic radar probe and an ultrasonic radar drive interface circuit. The ultrasonic radar probe is installed through the side wall of the chassis housing. The ultrasonic radar drive interface circuit is electrically connected to the ultrasonic radar probe. The ultrasonic radar drive interface circuit is used to drive the ultrasonic radar probe to emit ultrasonic signals, receive echo signals, and amplify, filter, and shape the echo signals, and output digital level signals to the interrupt pin of the main control circuit.

2. The CD player with human body sensing function as described in claim 1, characterized in that, The chassis housing contains a PCB main board and a PCB sub-board. The main control circuit and the ultrasonic radar drive interface circuit are located on the PCB main board. The main control circuit is electrically connected to the ultrasonic radar drive interface circuit to receive the digital level signal transmitted by the ultrasonic radar drive interface circuit.

3. The CD player with human body sensing function as described in claim 2, characterized in that, The human body sensing component also includes a touch screen, which is electrically connected to the main control circuit and is used to set the effective distance range of the ultrasonic signal.

4. The CD player with human body sensing function as described in claim 3, characterized in that, The chassis housing includes a top cover, a middle frame, and a bottom cover. The middle frame is located between the top cover and the bottom cover and has side walls of a predetermined height. The top cover and the bottom cover are fastened to the side walls of the middle frame. The top cover is an upwardly convex arc shape. The top cover and the middle frame form a player compartment for holding CD discs. The middle frame is located at the top of the bottom cover and forms a closed receiving space with the bottom cover. The receiving space contains a PCB circuit board and the CD player mechanism.

5. The CD player with human body sensing function as described in claim 4, characterized in that, The top cover is rotatably connected to the top edge of the side wall of the middle frame, and the CD player mechanism is attached to the bottom surface of the middle frame. The CD player mechanism is used to drive the CD disc to rotate and read the music information recorded on the CD disc.

6. The CD player with human body sensing function as described in claim 4, characterized in that, The sidewall of the middle frame has multiple mounting holes, in which the ultrasonic radar probe, volume control knob, and multiple external interfaces are respectively installed. The multiple external interfaces include fiber optic interfaces, coaxial interfaces, and XLR XLR interfaces. The multiple external interfaces are used to connect to external power amplifier devices and provide digital audio signals or analog audio signals to the external power amplifier devices.

7. The CD player with human body sensing function as described in claim 4, characterized in that, The touch screen is mounted on the top cover, and multiple function buttons are installed around the touch screen. The PCB circuit sub-board is mounted on the inside of the top cover, and the touch screen and each of the function buttons are electrically connected to the PCB circuit sub-board. The PCB circuit sub-board is connected to the PCB circuit main board via a ribbon cable.

8. The CD player with human body sensing function as described in claim 7, characterized in that, Multiple function buttons are located on the outer surface of the top cover, and these function buttons are used to control the music playback function of the CD disc; the touch screen is used to receive the human body sensing setting parameter values ​​of the ultrasonic radar module, and to display the working status of the player or the duration of the playback track when playing music.

9. The CD player with human body sensing function as described in claim 1, characterized in that, The main control circuit includes a CD player servo and audio codec system chip. The CD player servo and audio codec system chip is connected to the CD player mechanism through a motor drive circuit. The CD player servo and audio codec system chip is used to drive the CD player mechanism to rotate and decode the received music digital signals.

10. The CD player with human body sensing function as described in claim 9, characterized in that, The main control circuit also includes a stereo headphone amplifier chip, the input of which is connected to the CD player servo and audio codec system chip, and the output of which is connected to stereo headphones.

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