Hand warmer integrated with mirror display 3D pattern

Abstract

The utility model discloses a kind of hand warmer integrated with mirror display 3D pattern, including middle frame;Mirror component is arranged in the one side of the middle frame, the mirror component is integrated with digital display component and image display component in, the digital display component is used to show temperature data, the image display component is used to show photo image;Heating component is arranged in the other side of the middle frame;PCB board is arranged in the middle frame, the PCB board is integrated with control circuit and the battery for the control circuit power supply, the battery is pasted on the back of PCB board by back force glue;The utility model is by setting photo in reflector back, and cooperate with specific back light circuit, user can easily control the same area between clear mirror and bright photo display Switching;When not lighting back light, reflector provides perfect daily mirror function;When lighting back light, light ray penetrates reflector and illuminates rear photo, so that it is clearly displayed through light-transmitting lens, realizes personalized display.

Description

Technical Field

[0001] This utility model relates to the field of hand warmer technology, specifically to a hand warmer integrated with a mirrored display of 3D patterns. Background Technology

[0002] Traditional hand warmers have relatively simple functions, primarily focusing on heating to meet users' warmth needs. With rising living standards and the widespread use of portable electronic devices, users demand greater functionality and convenience from everyday items. When applying makeup, skincare, or grooming, users often need to use both a mirror and a hand warmer simultaneously, but carrying multiple separate items is inconvenient. While existing technologies have attempted to combine mirrors with hand warmers, these typically involve simply attaching the mirror to the hand warmer's outer shell, offering limited functionality and lacking interactivity and information display capabilities. Furthermore, the temperature displays on existing hand warmers are often rudimentary or poorly positioned, failing to meet users' needs for real-time, clear temperature information. In addition, users increasingly demand personalized displays (such as showing favorite photos), but currently, there is a lack of solutions that effectively integrate personalized image display functionality into such everyday items as hand warmers. Existing hand warmers with integrated display technologies often have complex display component structures, low reliability, or interference with the mirror display effect, making it difficult to achieve clear, non-interfering temperature information and image display while maintaining good mirror functionality. Therefore, there is an urgent need for an innovative hand warmer solution that is compact, feature-rich, provides a good user experience, and seamlessly integrates heating, mirroring, digital information display, and personalized image display. Utility Model Content

[0003] In view of this, the main purpose of this utility model is to provide a hand warmer that integrates a mirror display of 3D patterns.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] This utility model embodiment provides a hand warmer integrated with a mirror-display 3D pattern, including:

[0006] Mid-frame;

[0007] A mirror assembly is disposed on one side of the middle frame. The mirror assembly integrates a digital display assembly and an image display assembly. The digital display assembly is used to display temperature data, and the image display assembly is used to display photographic images.

[0008] A heating element is located on the other side of the middle frame;

[0009] A PCB board is disposed within the middle frame. The PCB board integrates a control circuit and a battery that powers the control circuit. The battery is attached to the back of the PCB board with a rebound adhesive.

[0010] The control circuit is electrically connected to the heating component, the digital display component, and the image display component, respectively, and is used to control the working state of the heating component, transmit temperature signals to the digital display component, and transmit image control signals to the image display component.

[0011] In the above solution, the mirror assembly includes:

[0012] The light-transmitting mirror has its light-transmitting surface facing the outside of the middle frame;

[0013] A reflector is disposed behind the light-transmitting mirror, with its reflective surface facing the light-transmitting mirror, and a photograph is printed on the side of the reflector away from the light-transmitting mirror;

[0014] The main body front cover covers the edge of the light-transmitting mirror, pressing and fixing the light-transmitting mirror and the reflector into the middle frame;

[0015] The digital display component includes a digital display sticker and a digital display frame. The digital display sticker is mounted in the mounting holes provided on the reflector and the middle frame through the digital display frame. The image display component includes a light guide sheet that guides light to the reflector to display the photo on the reflector, thus forming the display interface of the mirror component.

[0016] In the above solution, the heating component includes:

[0017] The main body back cover is fixed to the side of the middle frame facing away from the mirror assembly;

[0018] The heating module is fitted onto the inner surface of the back cover of the main body;

[0019] The heating cover is fastened to the rear cover of the main body, and the heating module is encapsulated in the accommodating space formed between the rear cover of the main body and the heating cover.

[0020] In the above scheme, the control circuit includes a battery charging and discharging management circuit, a main control circuit, a front-view backlight circuit, a side-view backlight circuit, and a RGB lighting circuit. The battery charging and discharging management circuit is powered through a TYPE-C interface. The battery charging and discharging management circuit outputs voltage to the main control circuit, and the main control circuit charges the battery. The signal output terminal of the main control circuit is connected to the signal output terminals of the front-view backlight circuit, the side-view backlight circuit, the RGB lighting circuit, and the heating module, respectively. The front-view backlight circuit, the side-view backlight circuit, and the RGB lighting circuit are all mounted on a PCB board.

[0021] In the above scheme, the main control circuit includes a main control chip, an eighth resistor, a ninth capacitor, and a twelfth capacitor. The eighth terminal of the main control chip is connected to the first terminal of the eighth resistor, the first terminal of the ninth capacitor, and the first terminal of the twelfth capacitor, respectively. The second terminal of the eighth resistor is connected to the second terminal and the fourth terminal of the battery, respectively. The second terminals of the ninth capacitor and the twelfth capacitor are both grounded. The S1 terminal of the main control chip is connected to the first terminal of the switch, and the second terminal of the switch is grounded.

[0022] In the above scheme, the battery charge / discharge management circuit includes a battery charge / discharge management chip, a second resistor, a fifteenth resistor, a first capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a first inductor. The VIN terminal of the battery charge / discharge management chip is connected to the first terminal of the second resistor, the first terminal of the fourth capacitor, and the VBUS terminal of the TYPE-C interface, respectively. The second terminal of the second resistor is connected to ground after being connected in series with the first capacitor. The LX terminal of the battery charge / discharge management chip is connected to the first terminal of the fifteenth resistor and the first terminal of the first inductor, respectively. The second terminal of the first inductor is connected to the second terminal and the fourth terminal of the battery, respectively. The second terminal of the fifteenth resistor is connected to ground after being connected in series with the sixth capacitor. The BAT terminal of the battery charge / discharge management chip is connected to the second terminal, the fourth terminal of the battery, and the first terminal of the fifth capacitor, respectively. The second terminal of the fifth capacitor is grounded. The LED1 terminal of the battery charge / discharge management chip is connected to the CH_DET2 terminal of the main control chip.

[0023] In the above scheme, the heating module includes an eleventh resistor, a twelfth resistor, a second transistor, and a heating element. The first end of the eleventh resistor is connected to the PWM_heat terminal of the main control chip. The second end of the eleventh resistor is connected to the first end of the twelfth resistor and the base of the second transistor. The second end of the twelfth resistor is connected to the collector of the second transistor and then grounded. The emitter of the second transistor is connected to the first end of the heating element. The second end of the heating element is connected to the V_BAT terminal of the battery.

[0024] In the above scheme, the front-facing backlight circuit includes a first string group consisting of multiple first light-emitting diodes connected in parallel, a fourth transistor, a twentieth resistor, and a twenty-first resistor. The positive terminal of the first string group is connected to the V_BAT terminal of the battery, and the negative terminal of the first string group is connected to the emitter of the fourth transistor. The collector of the fourth transistor is connected to the first terminal of the twenty-first resistor and then grounded. The second terminal of the twenty-first resistor is connected to the base of the fourth transistor and the first terminal of the twenty resistor, respectively. The second terminal of the twenty resistor is connected to the PWM_LED terminal of the main control chip.

[0025] In the above scheme, the side-view backlight circuit includes a second string group consisting of multiple second light-emitting diodes connected in parallel. The positive terminal of the second string group is connected to the V_BAT terminal of the battery, and the negative terminal of the second string group is connected to the emitter of the fourth transistor.

[0026] In the above scheme, the RGB light circuit includes multiple RGB lights, a 23rd resistor, and a 22nd resistor. The second and fourth terminals of the multiple RGB lights are connected in sequence to form a RGB light string. The third terminal of each RGB light is grounded. The first terminal of each RGB light is connected to the V_BAT terminal of the battery. The fourth terminal of the first RGB light is connected in series with the 23rd resistor and then connected to the RGB terminal of the main control chip. The second terminal of the last RGB light is connected to the 22nd resistor.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] This invention allows users to easily switch between a clear mirror surface and a bright photo display in the same area by placing a photo on the back of a reflector and using a specific backlight circuit (front-view backlight or side-view backlight). When the backlight is off, the reflector provides a perfect everyday mirror function; when the backlight is on, light passes through the reflector to illuminate the photo behind it, allowing it to be clearly displayed through a translucent mirror for personalized display. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this invention, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a hand warmer integrated with a mirrored 3D pattern, as described in an embodiment of this utility model.

[0031] Figure 2 This is a schematic diagram of the TYPE-C interface in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the battery charging and discharging management circuit in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the main control chip in a hand warmer with integrated mirror display 3D patterns, as described in an embodiment of this utility model.

[0034] Figure 5 This is a schematic diagram of the circuit structure of the heating module in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the circuit structure of the front-view backlight circuit in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present utility model;

[0036] Figure 7 This is a schematic diagram of the circuit structure of a side-view backlight circuit in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present utility model.

[0037] Figure 8 This is a schematic diagram of the circuit structure of the switch in a hand warmer with an integrated mirror display of 3D patterns, as described in an embodiment of this utility model.

[0038] Figure 9 This is a schematic diagram of the structure of the iridescent circuit in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the circuit structure of the battery in a hand warmer with a mirrored 3D pattern integrated according to an embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0041] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0043] This utility model embodiment provides a hand warmer integrated with a mirror-display 3D pattern, such as... Figures 1-10 As shown, it includes:

[0044] Mid-frame 3;

[0045] A mirror assembly is disposed on one side of the middle frame 3. The mirror assembly integrates a digital display assembly and an image display assembly. The digital display assembly is used to display temperature data, and the image display assembly is used to display photographic images.

[0046] A heating element is disposed on the other side of the middle frame 3;

[0047] The PCB board 9 is disposed within the middle frame 3. The PCB board 9 integrates a control circuit and a battery 11 that powers the control circuit. The battery 11 is attached to the back of the PCB board 9 by a rebound adhesive 10.

[0048] The control circuit is electrically connected to the heating component, the digital display component, and the image display component, respectively, and is used to control the working state of the heating component, transmit temperature signals to the digital display component, and transmit image control signals to the image display component.

[0049] In the above solution, the mirror assembly includes:

[0050] The light-transmitting mirror 1 has its light-transmitting surface facing the outside of the middle frame 3;

[0051] A reflector 2 is disposed behind the light-transmitting mirror 1, with its reflective surface facing the light-transmitting mirror 1. A photograph is printed on the side of the reflector 2 away from the light-transmitting mirror 1.

[0052] The main body front cover 4 covers the edge of the light-transmitting mirror 1 and presses and fixes the light-transmitting mirror 1 and the reflector 2 into the middle frame 3;

[0053] The digital display component includes a digital display sticker 7 and a digital display frame 8. The digital display sticker 7 is installed in the mounting holes 12 provided on the reflector 2 and the middle frame 3 through the digital display frame 8. The image display component includes a light guide plate 6, which is located behind the reflector 2 and guides light to the reflector 2 to display the photo on the reflector 2, thus forming the display interface of the mirror component.

[0054] like Figure 1 , Figure 4 and Figure 5 As shown, the heating component includes:

[0055] The main body back cover 14 is fixed to the side of the middle frame 3 facing away from the mirror assembly;

[0056] A heating module is fitted onto the outer surface of the main body rear cover 14;

[0057] The heating cover 13 is fastened to the main body rear cover 14, and the heating module is encapsulated in the accommodating space formed between the main body rear cover 14 and the heating cover 13.

[0058] like Figure 1-10 As shown, the control circuit includes a battery charging and discharging management circuit, a main control circuit, a front-view backlight circuit, a side-view backlight circuit, and a RGB lighting circuit. The battery charging and discharging management circuit is powered through a TYPE-C interface USB1. The battery charging and discharging management circuit outputs voltage to the main control circuit, which charges the battery 11. The signal output terminal of the main control circuit is connected to the signal output terminals of the front-view backlight circuit, the side-view backlight circuit, the RGB lighting circuit, and the heating module, respectively. The front-view backlight circuit, the side-view backlight circuit, and the RGB lighting circuit are all mounted on the PCB board 9.

[0059] like Figure 3 , Figure 4 , Figure 8 , Figure 9 and Figure 10 As shown, the main control circuit includes a main control chip U5, an eighth resistor R8, a ninth capacitor C9, and a twelfth capacitor C12. The eighth terminal of the main control chip U5 is connected to the first terminal of the eighth resistor R8, the first terminal of the ninth capacitor C9, and the first terminal of the twelfth capacitor C12, respectively. The second terminal of the eighth resistor R8 is connected to the second terminal and the fourth terminal of the battery 11, respectively. The second terminals of the ninth capacitor C9 and the twelfth capacitor C12 are both grounded. The S1 terminal of the main control chip is connected to the first terminal of the switch SW1, and the second terminal of the switch SW1 is grounded.

[0060] like Figure 2-4As shown, the battery charge / discharge management circuit includes a battery charge / discharge management chip U0, a second resistor R2, a fifteenth resistor R15, a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a first inductor L1. The VIN terminal of the battery charge / discharge management chip U0 is connected to the first terminal of the second resistor R2, the first terminal of the fourth capacitor C4, and the VBUS terminal of the TYPE-C interface USB1. The second terminal of the second resistor R2 is connected to ground in series with the first capacitor C1. The LX terminal of the battery charge / discharge management chip U0 is connected to... The first end of the fifteenth resistor R15 is connected to the first end of the first inductor L1. The second end of the first inductor L1 is connected to the second end and the fourth end of the battery 11, respectively. The second end of the fifteenth resistor R15 is connected in series with the sixth capacitor C6 and then grounded. The BAT terminal of the battery charge and discharge management chip U0 is connected to the second end, the fourth end of the battery 11, and the first end of the fifth capacitor C5, respectively. The second end of the fifth capacitor C5 is grounded. The LED1 terminal of the battery charge and discharge management chip U0 is connected to the CH_DET2 terminal of the main control chip U5.

[0061] like Figure 1-5 As shown, the heating module includes an eleventh resistor R11, a twelfth resistor R12, a second transistor Q2, and a heating element 15. The first end of the eleventh resistor R11 is connected to the PWM_heat terminal of the main control chip U5. The second end of the eleventh resistor R11 is connected to the first end of the twelfth resistor R12 and the base of the second transistor Q2. The second end of the twelfth resistor R12 is connected to the collector of the second transistor Q2 and then grounded. The emitter of the second transistor Q2 is connected to the first end of the heating element 15. The second end of the heating element 15 is connected to the V_BAT terminal of the battery 11.

[0062] like Figure 4 , Figure 6 , Figure 7 and Figure 10 As shown, the front-facing backlight circuit includes a first string group consisting of multiple first light-emitting diodes (LEDs) connected in parallel, a fourth transistor (Q4), a twentieth resistor (R20), and a twenty-first resistor (R21). The positive terminal of the first string group is connected to the V_BAT terminal of the battery 11, and the negative terminal of the first string group is connected to the emitter of the fourth transistor (Q4). The collector of the fourth transistor (Q4) is connected to the first terminal of the twenty-first resistor (R21) and then grounded. The second terminal of the twenty-first resistor (R21) is connected to the base of the fourth transistor (Q4) and the first terminal of the twenty-first resistor (R20). The second terminal of the twenty-first resistor (R20) is connected to the PWM_LED terminal of the main control chip U5.

[0063] like Figure 4 , Figure 6 , Figure 7 and Figure 10 As shown, the side-view backlight circuit includes a second string group consisting of multiple second light-emitting diodes (LEDs) connected in parallel. The positive terminal of the second string group is connected to the V_BAT terminal of the battery 11, and the negative terminal of the second string group is connected to the emitter of the fourth transistor Q4.

[0064] like Figure 4 , Figure 9 and Figure 10 As shown, the RGB lighting circuit includes multiple RGB lights, a 23rd resistor R23, and a 22nd resistor R22. The second and fourth terminals of the multiple RGB lights are connected in sequence to form a string of lights. The third terminal of each RGB light is grounded. The first terminal of each RGB light is connected to the V_BAT terminal of the battery 11. The fourth terminal of the first RGB light is connected in series with the 23rd resistor R23 and then connected to the RGB terminal of the main control chip U5. The second terminal of the last RGB light is connected to the 22nd resistor R22.

[0065] The working principle of this utility model is as follows:

[0066] like Figure 1-9 As shown, the working principle of this hand warmer revolves around the collaborative operation of its core components. After the user starts the device via switch 5, the control circuit on the PCB board 9 built into the middle frame 3 begins to work. The main control chip U5, as the core controller, first manages the charging and discharging of the battery 11: when an external power source is connected via the TYPE-C interface USB1, the battery charging and discharging management circuit starts working, charging the battery 11 and supplying the converted voltage to the main control chip U5 and other circuits. The main control chip U5 controls the working state of the heating module according to the preset program or user operation instructions. The main control chip U5 sends a control signal (such as a high level), which drives the base of the transistor through the current-limiting resistor, causing the transistor to conduct, thereby connecting the circuit between the heating element 15 and the battery 11 (V_BAT terminal). The heating element 15 is powered on and generates heat, which is transferred to the outside through the attached main body back cover 14 to warm the user.

[0067] In terms of display, the main control chip U5 transmits the processed temperature signal to the digital display component. Supported by the digital display frame, the digital display panel (such as a digital tube or a specific display area) clearly displays the temperature information through the mounting holes 12 on the reflector 2. Users can observe these numbers through the light-transmitting mirror 1. For image display, users can place the selected photo behind the reflector 2. When an image needs to be displayed, the main control chip U5 controls either the side-view backlight circuit or the front-view backlight circuit (depending on the design, side-view is more commonly used to illuminate photos). Taking the side-view backlight circuit as an example: the main control chip U5 outputs a control signal, which drives a transistor (such as the fourth transistor Q4) to conduct through a resistor, causing the second series group to be energized and illuminate. The light shines on the light guide plate 6, uniformly illuminating the photo on the reflector 2. The light then passes through the reflector 2 (at this time, the reflector exhibits a certain degree of light transmittance under specific lighting conditions) and the light-transmitting mirror 1, clearly presenting the photo image in 3D form on the mirror area, thus forming an image display. Throughout the entire operation, the reflector 2 mainly functions as a reflector when the backlight is off, and simultaneously serves as a display image carrier when the backlight is on.

[0068] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A hand warmer integrated with a mirror display 3D pattern, characterized in that, include: Mid-frame; A mirror assembly is disposed on one side of the middle frame. The mirror assembly integrates a digital display assembly and an image display assembly. The digital display assembly is used to display temperature data, and the image display assembly is used to display photographic images. A heating element is located on the other side of the middle frame; A PCB board is disposed within the middle frame. The PCB board integrates a control circuit and a battery that powers the control circuit. The battery is attached to the back of the PCB board with a rebound adhesive. The control circuit is electrically connected to the heating component, the digital display component, and the image display component, respectively, and is used to control the working state of the heating component, transmit temperature signals to the digital display component, and transmit image control signals to the image display component.

2. The hand warmer integrated with a mirror display 3D pattern according to claim 1, wherein, The mirror assembly includes: The light-transmitting mirror has its light-transmitting surface facing the outside of the middle frame; A reflector is disposed behind the light-transmitting mirror, with its reflective surface facing the light-transmitting mirror, and a photograph is printed on the side of the reflector away from the light-transmitting mirror; The main body front cover covers the edge of the light-transmitting mirror, pressing and fixing the light-transmitting mirror and the reflector into the middle frame; The digital display component includes a digital display sticker and a digital display frame. The digital display sticker is mounted in the mounting holes provided on the reflector and the middle frame through the digital display frame. The image display component includes a light guide sheet that guides light to the reflector to display the photo on the reflector, thus forming the display interface of the mirror component.

3. The hand warmer integrated with a mirror display 3D pattern according to claim 2, characterized in that, The heating component includes: The main body back cover is fixed to the side of the middle frame facing away from the mirror assembly; A heating module is fitted onto the inner surface of the back cover of the main body; The heating cover is fastened to the rear cover of the main body, and the heating module is encapsulated in the accommodating space formed between the rear cover of the main body and the heating cover.

4. The hand warmer integrated with a mirror display 3D pattern according to claim 3, characterized in that, The control circuit includes a battery charging and discharging management circuit, a main control circuit, a front-view backlight circuit, a side-view backlight circuit, and a RGB lighting circuit. The battery charging and discharging management circuit is powered through a TYPE-C interface. The battery charging and discharging management circuit outputs voltage to the main control circuit, which then charges the battery. The signal output terminals of the main control circuit are connected to the signal output terminals of the front-view backlight circuit, the side-view backlight circuit, the RGB lighting circuit, and the heating module, respectively. The front-view backlight circuit, the side-view backlight circuit, and the RGB lighting circuit are all mounted on a PCB board.

5. The hand warmer integrated with a mirror display 3D pattern according to claim 4, wherein, The main control circuit includes a main control chip, an eighth resistor, a ninth capacitor, and a twelfth capacitor. The eighth terminal of the main control chip is connected to the first terminal of the eighth resistor, the first terminal of the ninth capacitor, and the first terminal of the twelfth capacitor, respectively. The second terminal of the eighth resistor is connected to the second terminal and the fourth terminal of the battery, respectively. The second terminals of the ninth capacitor and the twelfth capacitor are both grounded. The S1 terminal of the main control chip is connected to the first terminal of the switch, and the second terminal of the switch is grounded.

6. The hand warmer integrated with a mirror display 3D pattern according to claim 5, wherein, The battery charge / discharge management circuit includes a battery charge / discharge management chip, a second resistor, a fifteenth resistor, a first capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a first inductor. The VIN terminal of the battery charge / discharge management chip is connected to the first terminal of the second resistor, the first terminal of the fourth capacitor, and the VBUS terminal of the TYPE-C interface, respectively. The second terminal of the second resistor is connected to ground after being connected in series with the first capacitor. The LX terminal of the battery charge / discharge management chip is connected to the first terminal of the fifteenth resistor and the first terminal of the first inductor, respectively. The second terminal of the first inductor is connected to the second terminal and the fourth terminal of the battery, respectively. The second terminal of the fifteenth resistor is connected to ground after being connected in series with the sixth capacitor. The BAT terminal of the battery charge / discharge management chip is connected to the second terminal, the fourth terminal of the battery, and the first terminal of the fifth capacitor, respectively. The second terminal of the fifth capacitor is grounded. The LED1 terminal of the battery charge / discharge management chip is connected to the CH_DET2 terminal of the main control chip.

7. A hand warmer integrating a mirrored 3D pattern display according to claim 6, characterized in that, The heating module includes an eleventh resistor, a twelfth resistor, a second transistor, and a heating element. The first end of the eleventh resistor is connected to the PWM_heat terminal of the main control chip. The second end of the eleventh resistor is connected to the first end of the twelfth resistor and the base of the second transistor. The second end of the twelfth resistor is connected to the collector of the second transistor and then grounded. The emitter of the second transistor is connected to the first end of the heating element. The second end of the heating element is connected to the V_BAT terminal of the battery.

8. A hand warmer integrating a mirrored 3D pattern display according to claim 7, characterized in that, The front-facing backlight circuit includes a first string group consisting of multiple first light-emitting diodes connected in parallel, a fourth transistor, a twentieth resistor, and a twenty-first resistor. The positive terminal of the first string group is connected to the V_BAT terminal of the battery, and the negative terminal of the first string group is connected to the emitter of the fourth transistor. The collector of the fourth transistor is connected to the first terminal of the twenty-first resistor and then grounded. The second terminal of the twenty-first resistor is connected to the base of the fourth transistor and the first terminal of the twenty resistor, respectively. The second terminal of the twenty resistor is connected to the PWM_LED terminal of the main control chip.

9. A hand warmer integrating a mirrored 3D pattern display according to claim 8, characterized in that, The side-view backlight circuit includes a second string group consisting of multiple second light-emitting diodes connected in parallel. The positive terminal of the second string group is connected to the V_BAT terminal of the battery, and the negative terminal of the second string group is connected to the emitter of a fourth transistor.

10. A hand warmer integrating a mirrored 3D pattern display according to claim 9, characterized in that, The RGB lighting circuit includes multiple LEDs, a 23rd resistor, and a 22nd resistor. The second and fourth terminals of the multiple LEDs are connected in sequence to form an LED string. The third terminal of each LED is grounded. The first terminal of each LED is connected to the V_BAT terminal of the battery. The fourth terminal of the first LED is connected in series with the 23rd resistor and then connected to the RGB terminal of the main control chip. The second terminal of the last LED is connected to the 22nd resistor.

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