TWI823094B - Earphone charging box and projection control method thereof - Google Patents

Abstract

The invention provides an earphone charging box and a projection control method thereof. The earphone charging box includes: a box body for accommodating earphones, the box body is provided with a light source; a box cover detachably connected with the box body, the box cover is provided with a visual window, the inner wall of the box cover corresponding to the position of the viewing window is detachably embedded with a projection sheet; when the light source illuminates the projection sheet, the earphone charging box projects a preset pattern. The earphone charging box and the projection control method of the present invention enable the projection sheet to project a preset pattern under the illumination of the light source through the light source and the projection sheet respectively arranged on the box body and the box cover, thereby increasing the functionality of the earphone charging box. In addition, the projection sheet can be detachably set, and the user can flexibly replace the projection sheet in need to improve the experience of using the earphone charging box.

Description

Headphone charging box and projection control method thereof

The present invention relates to the technical field of earphone equipment, and specifically, to an earphone charging box and a projection control method thereof.

The headphone charging box is used to store and charge the headphones. At present, most of the headphone charging boxes have a relatively single function, and users cannot use the headphone charging box to achieve other functions.

For example, the currently popular TWS (True Wireless Stereo) headphone charging box has a box body for placing headphones and a brand name printed on the cover. The entire headphone charging box has no other additional functions. As electronic products become increasingly intelligent, users usually hope to use one device to achieve more functions. Single-function headphone charging boxes lead to poor user experience.

In view of this, the present invention provides an earphone charging box and a projection control method thereof, which can enable the earphone charging box to have a projection function, increase the functionality of the earphone charging box, and improve the use experience of the earphone charging box.

One aspect of the present invention provides an earphone charging box, which includes: a box body for accommodating earphones; a light source is provided in the box body; a box cover is releasably connected to the box body; The box cover is provided with a visual window, and a projection film is detachably embedded in the inner wall of the box cover corresponding to the position of the visual window; when the light source illuminates the projection film, the headphone charging box projects a preset pattern.

Another aspect of the present invention provides a projection control method for an earphone charging box. The projection control method includes: detecting a signal from the earphone charging box; when a projection trigger signal is detected, controlling the light source to emit light so that the projection film is illuminated by the light source. Project a preset pattern.

The headphone charging box and its projection control method of the present invention use a light source and a projection film respectively provided on the box body and the lid, so that the projection film projects a preset pattern under the illumination of the light source, thereby increasing the functionality of the headphone charging box; projection The film is detachable, and the user can flexibly replace the projection film according to needs and change the projection effect of the headphone charging box; the light source can be controlled in various ways, and the user can easily achieve and adjust the desired projection effect according to his or her own habits; and the headphone charging box It can automatically adjust the projection effect in different scenes, greatly enhancing the practicality and fun, and improving the experience of using the headphone charging box.

In order to have a better understanding of the above and other aspects of the present invention, examples are given below and are described in detail with reference to the accompanying drawings:

1: Box body

2: Box lid

10: Headphones

11:Light source

20:Visual window

21:Slideshow

221:Lower ladder

222: Upper ladder

223: Groove

23:Seals

230:Lug

24:Touch sensing device

24’:Touch sensing area

11a,11b,11c,11d,11e: lamp beads

Figure 1 shows a schematic structural view of the headphone charging box in the embodiment of the present invention; Figure 2 shows a schematic exploded structure of the headphone charging box in the embodiment of the present invention; Figure 3 shows the exploded structure of the box cover in the embodiment of the present invention. Schematic diagram; Figure 4 shows a schematic diagram of touch adjustment of the earphone charging box in an embodiment of the present invention; Figure 5 shows a schematic diagram of an earphone charging box provided with physical buttons in an embodiment of the present invention; Figure 6 shows a schematic diagram of a box equipped with multiple light sources in an embodiment of the present invention; Figure 7 shows another embodiment of the present invention. A schematic diagram of the exploded structure of the headphone charging box; Figure 8 shows a schematic step diagram of the projection control method of the headphone charging box in an embodiment of the present invention; Figure 9 shows a projection control method of the headphone charging box in another embodiment of the present invention. Step diagram.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments to Persons skilled in the art. The described features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and/or processor devices and/or microcontroller devices. these functional entities.

It should be noted that, as long as there is no conflict, the embodiments of the present invention and features in different embodiments can be combined with each other.

Figure 1 shows the main structure of the headphone charging box in one embodiment. Figure 2 shows the decomposed structure of the headphone charging box. As shown in Figure 1 and Figure 2, the headphone charging box in this embodiment includes: box body 1. Used to accommodate earphones 10. The box body 1 is provided with a light source 11; the box cover 2 is releasably connected to the box body 1. The box cover 2 is provided with a visual window 20, and the inner wall of the box cover 2 corresponds to the visual window 20. A projection film 21 is detachably embedded in the position; when the light source 11 illuminates the projection film 21, the earphone charging box projects a preset pattern.

The light source 11 shown in Figures 1 and 2 includes one, but is not limited to this. In different embodiments, the number of light sources 11 can be adjusted as needed.

The light source may specifically be an LED (Light Emitting Diode, light-emitting diode) lamp bead, or other equipment capable of illumination. The transparency of the projection film 21 is higher than the threshold, such as transparent, translucent or matte, so that the preset pattern can be projected under the illumination of the light source 11 . The projection film 21 can be colorless or colored, specifically selected from any of the following: film, lenses, light-transmitting plates with hollow patterns, plastic sheets, glass sheets, metal sheets, or other sheets with patterns that can be projected. .

In this embodiment, a light source 11 and a projection film 21 are respectively provided in the box body 1 and the lid 2 of the headphone charging box, so that the headphone charging box has a projection function and a lighting function. When the light source 11 illuminates the projection film 21, the headset can be charged. The box projects the preset pattern of the slide 21. When the slide 21 is made of transparent glass or frosted glass, the headphone charging box can be used as a night light or light, increasing the functionality of the headphone charging box; and the slide 21 is detachable. The setting facilitates the user to flexibly change the projection film 21 according to needs, change the projection effect of the headphone charging box, and enhance the user experience.

In one embodiment, as shown in Figure 2, a stepped recessed structure is formed on the inner wall of the box cover 2, and the bottom surface of the recessed structure corresponds to the visual window 20; the projection film 21 is engaged with the lower step 221 of the recessed structure, and Partially protruding from the lower step 221, a sealed space is formed between the protruding part of the projection film 21 and the upper step 222 of the recessed structure; the earphone charging box also includes a sealing member 23, and as the sealing member 23 is engaged in the sealed space, the projection film 21 is fixed.

In this embodiment, the projection film 21 is a circular sheet, adapting to the shape of the projection film 21. The viewing window 20 is formed into a circular viewing window, the lower step 221 of the recessed structure is formed into an annular step, and the sealing member 23 is formed into an annular sealing ring. The upper step 222 of the structure is also generally circular.

The inner diameter of the lower step 221 of the recessed structure is roughly equal to the diameter of the projection film 21, so that the projection film 21 can be locked and fixed on the lower step 221; the inner diameter of the upper step 222 of the recessed structure is slightly larger than the inner diameter of its lower step 221, so that When the projection film 21 is engaged with the lower step 221, the projection film 21 protrudes between the outer edge of the lower step 221 and the upper step 222 to form an annular narrow slit-shaped sealing space for the sealing member 23 to engage and fix. When the sealing member 23 is engaged in the sealed space, the projection film 21 is firmly embedded in the inner wall of the box cover 2 .

Further, in one embodiment, continuing to refer to Figure 2, the outer periphery of the seal 23 is provided with a lug 230, and the upper step 222 is provided with a groove 223 matching the lug 230. The lug 230 and the groove 223 can be respectively Multiple ones are provided at intervals. When the sealing member 23 is engaged in the sealing space, the lugs 230 are embedded in the grooves 223 to enhance the stabilizing effect.

When the sealing member 23 is engaged in the sealed space and partially protrudes from the upper step 222 for replacing the projection film 21 , the sealing member 23 can be easily removed through the portion of the sealing member 23 that protrudes from the upper step 222 , thereby realizing Replace the slide 21.

In one embodiment, a certain gap may be left between a lug 230 of the sealing member 23 and the corresponding groove 223 to facilitate loosening of the sealing member 23 through the gap when replacing the projection film 21 .

In one embodiment, a touch sensing device can be provided on the inner wall of the box cover 2 to adjust the light source 11 . Referring to FIG. 2 , the touch sensing device 24 is formed into an annular sheet structure that fits the inner wall of the box cover 2 , and the inner ring of the annular sheet structure forms an upper step 222 . That is, as shown in combination with Figures 2 and 3 (Figure 3 only schematically shows the exploded structure of the box cover 2 and does not fully show the specific structure and shape characteristics of each exploded component), this embodiment , the inner wall of the box cover 2 is provided with an annular groove, and the bottom surface is provided with a viewing window 20, such as transparent glass, and the side walls of the annular groove form a lower step 221; the touch sensing device 24 with an annular sheet structure is attached to the box. The inner wall and inner ring of the cover 2 form an upper step 222. Therefore, through the box cover 2 and the touch sensing device 24, a recessed structure for the projection film 21 and the sealing member 23 to be assembled is formed.

The touch sensing device 24 can be used to trigger the light source 11 to emit light according to a preset touch action. Specifically, the touch sensing device 24 and the light source 11 are both connected to the control motherboard (not specifically shown in the figure) of the earphone charging box. The touch sensing device 24 is used to generate a projection trigger signal when a preset touch action is detected, and control the The main board is used to control the light source 11 to emit light according to the projection trigger signal.

In this embodiment, function reuse is realized through the touch sensing device 24. Its structure facilitates the assembly of the projection film 21, and it has the function of triggering the light source 11, so that the overall structure of the headphone charging box is simple and compact, and its functions are integrated.

The control motherboard is specifically arranged in the box body 1. The touch sensing device 24 can be made of copper foil, PCB (Printed Circuit Board, printed circuit board) and other metal materials. Between the touch sensing device 24 and the control motherboard, a gap can be passed through the box. At the connection between the body 1 and the box cover 2, a pogo pin or other connector, a spring piece or an FPC (Flexible Printed Circuit, flexible circuit board) is provided to realize the connection.

Combining Figures 2 and 4, Figure 4 is a schematic diagram of touch adjustment of the earphone charging box, in which a touch-sensing area 24' is marked on the outer wall of the box cover 2 at a position corresponding to the touch-sensing device 24. The specific implementation method of triggering the projection or illumination of the earphone charging box through the touch sensor device 24 is as follows. If you click twice in succession on the touch sensor area 24', the touch sensor device 24 will send out a projection trigger signal indicating on/off, and the control motherboard will receive the signal. After projecting the trigger signal, if the light source 11 is in the off state at this time, the light source 11 is turned on, and if the light source 11 is in the on state, the light source 11 is turned off. When the light source 11 is turned on and the projection film 21 is illuminated, the earphone charging box displays a preset projection effect. At this time, the user can further perform a preset touch action on the touch sensing area 24' to adjust the light source 11. For example, when the touch sensing device 24 detects a clockwise touch, it emits a signal indicating an increase in brightness. According to the signal, the control motherboard can increase the brightness of the light source 11 by increasing the current flowing through the light source 11; when the touch When the sensing device 24 detects a counterclockwise touch action, it emits a signal indicating a decrease in brightness. According to the signal, the control motherboard can reduce the brightness of the light source 11 by reducing the current flowing through the light source 11 .

In other embodiments, the light source 11 can also be adjusted through other touch actions, such as up and down/left and right sliding. The headphone charging box can be configured with a setting button. The user can trigger the setting button to enter the setting mode, or enter the setting mode in the APP (Application) corresponding to the headphone charging box, and configure the preset touch actions according to their own usage habits.

Furthermore, in addition to the above-mentioned touch sensing device 24, in one embodiment, in conjunction with Figure 1 or Figure 2, the headphone charging box can also be provided with other projection triggering devices, both through the control motherboard of the headphone charging box and The light source 11 is connected, and the projection trigger device generates a projection trigger signal when detecting a preset condition, so that the control motherboard controls the light source 11 to emit light according to the projection trigger signal. Among them, the preset conditions can be configured by users according to actual needs. The projection trigger device may specifically include any one or more of the following.

The Bluetooth module is located in the box 1. The Bluetooth module is used to communicate with a terminal, such as a mobile phone. When a projection trigger signal from the terminal is detected, it is transmitted to the control motherboard to trigger the light source 11 to emit light. For example, the headphone charging box communicates with the mobile phone through a Bluetooth module, and the mobile phone is equipped with an APP corresponding to the headphone charging box. Users can send a projection trigger signal through the APP interface through buttons, voice, etc., so that the headphone charging box enters the projection state.

The timing module is installed in the box 1. The timing module is used to generate a projection trigger signal to trigger the light source 11 to emit light when it detects that the preset opening period has entered. For example, the user can configure the projection time period from 21:00 to 22:00 every day, which is the default start time. Then, when the timing module detects that the current time is within the preset opening period, it generates a projection trigger signal, causing the headphone charging box to enter the projection state.

The motion sensing device is provided in the box 1. The motion sensing device is used to generate a projection trigger signal to trigger the light source 11 to emit light when a preset gesture is detected. For example, the default gesture action configured by the user is to flick left and right three times. When the user holds the headphone charging box and shakes it left and right three times, the motion sensing device responds and generates a projection trigger signal, triggering the headphone charging box to enter the projection state. Specifically, the motion sensing device may be a G-sensor (acceleration sensor), a gyroscope, or other devices capable of detecting motion.

The physical button is provided on the outer wall of the box cover 2. When a preset button operation is detected, the physical button is used to generate a projection trigger signal for controlling the motherboard to control the light source 11 to emit light. For example, consider the physical buttons "+" and "-" provided on the outer wall of the box cover 2 as shown in Figure 5 . The user can adjust the light source 11 through preset different key pressing modes, number of key presses, key press intervals, etc. for the "+" key and/or "-" key.

The above-mentioned projection triggering device includes a touch sensing device 24, a Bluetooth module, a timing module, a motion sensing device and physical buttons, and can be used in a mixed manner, so that the user can flexibly choose to use the earphone charging box and/or mobile phone according to usage habits. The APP controls the projection and lighting of the headset charging box and adjusts its projection and lighting effects.

In one embodiment, a storage chip can be provided in each slide 21 , and the pattern number of the slide 21 is stored in the storage chip. When the projection film 21 is assembled to the box cover 2, it can be connected to the control motherboard through the circuit on the inner wall of the box cover 2. Multiple sets of track bank numbers corresponding to multiple pattern numbers are stored in the control main board. The control main board is also used to play the tracks under the track bank numbers corresponding to the pattern numbers of the slides through the headphones according to the projection trigger signal, so that the user can Readers experience a matching visual and auditory experience. Of course, users can turn off or adjust the tracks played in the headphones according to their own needs.

In the above embodiments, the color and brightness of the light source 11 are also adjustable, and the user can set multiple sets of preset conditions to realize the on/off, color and brightness adjustment of the light source 11 . Moreover, as shown in FIG. 6 , in one embodiment, the light source 11 includes a plurality of lamp beads distributed at different positions of the box 1 , for example, including 5 lamp beads, respectively labeled 11a, 11b, 11c, 11d and 11e. The projection trigger signal emitted by the projection trigger device may specifically include one or more of a color signal, a brightness signal and a lighting sequence signal to achieve flexible adjustment of the on/off, brightness and color changes of the light source 11, and to realize the headphone charging box dynamic projection effect.

Figure 7 shows that in one embodiment, the projection film 21 of the headphone charging box is set as a light-transmitting plate with a special hollow pattern. The light source 11 includes a plurality of multi-color LED lamp beads distributed in different positions, and the headphone charging box is provided with Touch sensing device 24. In this embodiment, the user can use the touch sensing device 24 to trigger the control motherboard to control the LED lamp beads to alternately change color and light up, so that the projection of the earphone charging box presents a dynamic effect.

In summary, the earphone charging box described in the above embodiments uses a light source and a projection film respectively provided on the box body and the box cover, so that the projection film projects a preset pattern under the illumination of the light source, thereby increasing the functionality of the earphone charging box; The projection film is detachable, and users can flexibly replace the projection film and change the projection effect of the headset charging box as needed; and the light source control methods are diverse, so users can easily achieve and adjust the desired projection and lighting effects according to their own habits. .

The present invention also provides a projection control method for an earphone charging box, which can be applied to the earphone charging box described in any of the above embodiments. The features and principles of the headphone charging box described in any of the above embodiments can be applied to the following embodiments of the projection control method. Therefore, below In the above-mentioned embodiment of the projection control method, the features and principles of the earphone charging box that have been explained will not be repeated again.

The flowcharts shown in the following embodiments are only illustrative and do not necessarily include all steps. For example, some steps can be decomposed, and some steps can be combined or partially combined. Therefore, the actual execution order may change according to the actual situation.

For the projection control method in the following embodiment, the execution body is the control motherboard of the earphone charging box.

Figure 8 shows the main steps of the projection control method of the headphone charging box in one embodiment. Referring to Figure 8, the projection control method in this embodiment includes the following steps. Step S810: Detect the signal of the earphone charging box. Step S820: When the projection trigger signal is detected, the light source is controlled to emit light, so that the projection film projects a preset pattern under the illumination of the light source.

The conditions for the control motherboard to detect the projection trigger signal include one or more of the following: detecting touch actions through the touch sensing device of the headphone charging box, and generating a projection trigger signal when a preset touch action is detected; through the Bluetooth module of the headphone charging box Communicate with the terminal and transmit the projection trigger signal from the terminal; time the timing through the timing module of the headphone charging box, and generate the projection trigger signal when entering the preset opening period; detect gesture movements through the motion sensing device of the headphone charging box, and when the The projection trigger signal is generated when the preset gesture is performed; the button operation is detected through the physical buttons of the earphone charging box, and the projection trigger signal is generated when the preset button operation is detected.

Therefore, through the mixed control of light sources, users can easily realize and adjust the required projection effects and lighting effects according to their own habits, improving the user experience.

In one embodiment, after controlling the main board to control the light source to emit light, it also includes: obtaining the pattern number of the slide and the track library number corresponding to the pattern number; retrieving the track under the repertoire library number, and playing the retrieved track through the headphones, In order to enable users to experience a matching visual and auditory experience. For example, the pattern number of the slide is 002, which means that the pattern of the slide is about the starry sky. In the control main board, there are many songs related to the starry sky stored, and their track library number is 0020. The motherboard is controlled to play the track library number corresponding to the pattern number through the headphones according to the pattern number of the slide, so that the user can simultaneously watch the starry sky-related projection effects and listen to the starry sky-related songs.

Furthermore, in one embodiment, the headphone charging box can also automatically adjust the projection effect in different scenes, greatly enhancing the practicality and fun.

Specifically, referring to the projection control method shown in Figure 9, after controlling the light source to emit light, it also includes: step S830, when the music rhythm signal is detected, dynamically adjust the light emitting state of the light source so that the projection state of the earphone charging box is consistent with the music. Rhythm matching, the lighting state includes one or more of brightness state, color state and lighting sequence state.

The conditions for the control motherboard to detect the music rhythm signal are: through the sound detection device of the earphone charging box, detect whether the earphones are playing music; if so, detect the music played by the earphones and generate a music rhythm signal; if not, detect the environmental sound , and generate a musical rhythm signal when valid audio of ambient sounds is detected.

The sound detection device can be installed in the earphone to detect the sound in the earphone and in the environment. When it is detected that the headphones are playing music, a music rhythm signal is generated according to the rhythm of the music played in the headphones, thereby controlling the motherboard to dynamically adjust the light emission of the light source accordingly. status, such as accelerating the flickering transformation of the projection effect when the music rhythm is cheerful, allowing users to enjoy the matching music rhythm and projection effect at the same time, increasing the fun.

When the earphones are not playing music, the sound detection device generates a music rhythm signal based on the effective audio with a certain sense of rhythm detected in the environment, so that the earphone charging box changes the projection effect according to the fluctuation of the music.

The above-mentioned music rhythm is not limited to the rhythm of songs, but also includes other sounds with a certain rhythm, such as alarm bells. Specific rhythm detection can use existing technology, and will not be described here. In one embodiment, when the headphone charging box is in the projection state, it can control the lights to slowly turn on in conjunction with the alarm sound in the environment to create a natural sunrise projection effect.

Continuing to refer to Figure 9, in one embodiment, after controlling the light source to emit light, it also includes: step S840, when an incoming call signal is detected, determining whether the calling user has a classification identification; step S850, if so, based on the classification identification corresponding to the calling user. Classification mark, adjust the lighting state of the light source so that the projection state of the headphone charging box matches the classification mark corresponding to the incoming call user; step S860, if not, turn off the light source to facilitate the user to concentrate on the call.

Classification labels are labels added by users when saving, such as "family", "friends", "customers", etc. When it recognizes that the classification mark corresponding to the incoming call user is "Family", the control main board can adjust the projection state of the headset charging box to gradually increase and darken the yellow light to create a warm projection effect; when it recognizes that the incoming call user When the corresponding classification mark is "Friends", the control motherboard can adjust the projection state of the headset charging box to colorful light pulses to create a lively projection effect; when it recognizes that the corresponding classification mark of the incoming call user is "Customer", Controlling the motherboard can adjust the projection status of the headphone charging box to blue static light to facilitate the user's thinking.

When the call ends, you can return to the state before the call and adjust the projection state of the headphone charging box according to the music rhythm signal sent by the sound detection device; or you can also pause the projection and wait for the user to trigger the next projection of the headphone charging box.

In summary, the headphone charging box and its projection control method of the present invention use a light source and a projection film respectively provided on the box body and the lid, so that the projection film projects a preset pattern under the illumination of the light source, thereby increasing the functions of the headphone charging box. The projector is detachable and the user can flexibly replace the projector and change the projection effect of the headset charging box as needed; the light source can be controlled in various ways, and the user can easily achieve and adjust the desired projection effect and lighting according to their own habits. effect; and the headphone charging box can automatically adjust the projection effect in different scenes, greatly enhancing the practicality and fun, and improving the use experience of the headphone charging box.

In summary, although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the appended patent application scope.

1: Box body

2: Box lid

10: Headphones

11:Light source

21:Slideshow

Claims (13)

An earphone charging box includes: a box body for accommodating an earphone, the box body is provided with a light source; a box cover, the box cover is releasably connected to the box body, the box cover is provided with a visual window, A projection film is detachably embedded in the inner wall of the box cover corresponding to the position of the visual window. The projection film is provided with a storage chip; and a control motherboard is connected to the projection film to read the information stored in the storage chip. The pattern number of the slide and the track library number corresponding to the pattern number; when the light source illuminates the slide, the headphone charging box projects a preset pattern, wherein the headphone charging box includes one or more of the following projection triggering devices: 1. A Bluetooth module is located in the box. The Bluetooth module is used to trigger the light source to emit light when a control signal from the terminal is detected. A timing module is located in the box. The timing module is used to detect When the preset opening period is entered, the light source is triggered to emit light; a motion sensing device is provided in the box, and the motion sensing device is used to trigger the light source to emit light when a preset gesture action is detected; a physical button is provided in On the outer wall of the box cover, the physical button is used to trigger the light source to emit light when a preset button operation is detected. The headphone charging box as claimed in claim 1, wherein the inner wall of the box cover is formed with a stepped recessed structure, and the bottom surface of the recessed structure corresponds to the viewing window; The projection film is engaged with the lower step of the recessed structure and partially protrudes from the lower step. A sealed space is formed between the protruding part of the projection film and an upper step of the recessed structure; the headphone charging box also includes A sealing member is engaged with the sealed space, and the projection film is fixed. The earphone charging box according to claim 2, wherein the sealing member is provided with a lug on its outer periphery, and the upper step is provided with a groove matching the lug. When the sealing member is engaged in the sealed space, the lug Embedded in the groove; and when the sealing member is engaged in the sealed space, the sealing member partially protrudes from the upper step. The headphone charging box according to claim 3, further comprising: a touch sensing device formed as an annular sheet structure that fits the inner wall of the box cover, and the inner ring of the annular sheet structure forms the upper step; The touch sensing device and the light source are both connected to the control motherboard of the headphone charging box. The touch sensing device is used to generate a projection trigger signal when a preset touch action is detected. The control motherboard is used to control the projection trigger signal. The light source emits light. The headphone charging box of claim 4, wherein the control motherboard is provided in the box, and the touch sensing device is connected to the control motherboard through a connector, a spring piece or a flexible circuit board. The headphone charging box as claimed in claim 5, wherein the pattern number of the slide is stored in the storage chip; The control main board stores multiple sets of track bank numbers corresponding to multiple pattern numbers. The control main board is also used to play the track bank numbers corresponding to the pattern numbers of the slides through the headphones according to the projection trigger signal. repertoire. The headphone charging box according to claim 1, wherein the projection triggering device is connected to the light source through a control motherboard of the headphone charging box, and the projection triggering device generates a projection trigger signal when detecting a preset condition, and the control host The board is used to control the light source to emit light according to the projection trigger signal. The headphone charging box as described in claim 5 or 7, wherein the color and brightness of the light source are adjustable, and the light source includes a plurality of lamp beads distributed at different positions of the box; the projection trigger signal includes a color signal, a brightness signal and one or more of the lighting sequence signals. The headphone charging box as described in claim 1, wherein the transparency of the transparency is higher than a threshold, the transparency is colorless or colored, and the transparency is selected from any of the following: film, lenses, light-transmitting films with hollow patterns Board, plastic sheet, glass sheet, metal sheet. A projection control method for an earphone charging box. The projection control method includes: detecting a signal from an earphone charging box; when a projection trigger signal is detected, controlling a light source to emit light so that a projection film is projected under the illumination of the light source. a preset pattern; Among them, a control motherboard is connected to the slide, and reads a storage chip in the slide to obtain the pattern number of the slide and the track library number corresponding to the pattern number; and retrieve the track library number. The track is played through the earphone, and the conditions for detecting the projection trigger signal include one or more of the following: detecting a touch action through a touch sensing device of the earphone charging box, when a preset touch is detected The projection trigger signal is generated during action; it communicates with the terminal through a Bluetooth module of the headphone charging box, and transmits the projection trigger signal from the terminal; timing is performed through a timing module of the headphone charging box, and when the preset opening period is entered The projection trigger signal is generated when the gesture is detected; the gesture action is detected through a motion sensing device of the earphone charging box, and the projection trigger signal is generated when the preset gesture action is detected; the button operation is detected through a physical button of the earphone charging box, and when the preset gesture action is detected, the projection trigger signal is generated; The projection trigger signal is generated when a preset key is pressed. The projection control method as described in claim 10, wherein after controlling the light source to emit light, it further includes: when a music rhythm signal is detected, dynamically adjusting the illumination state of the light source so that the projection state of the earphone charging box matches the music rhythm, The lighting state includes one or more of a brightness state, a color state, and a lighting sequence state. The projection control method as described in claim 11, wherein the condition for detecting the music rhythm signal is: Through a sound detection device of the earphone charging box, it is detected whether the earphone plays music; if so, the music played by the earphone is detected and the music rhythm signal is generated; if not, the ambient sound is detected, and when the ambient sound is detected The music rhythm signal is generated when there is valid audio. The projection control method as described in claim 10, wherein after controlling the light source to emit light, it also includes: when an incoming call signal is detected, determining whether the incoming caller has a classification identifier corresponding to it; if so, according to the classification identifier corresponding to the incoming caller, Adjust the lighting state of the light source so that the projection state of the headphone charging box matches the classification mark corresponding to the incoming call user; if not, turn off the light source.

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