Pressed powder box
By adopting the cushioning design of spring and rubber pads in the powder box, the problem of easy damage during carrying the powder box is solved, effective cushioning protection and intelligent functions are achieved, and user experience is improved.
Patent Information
- Application Number
- CN202510411954.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-07-01
AI Technical Summary
Existing powder boxes are easily bumped or fallen by external items during carrying, resulting in damage to the powder and affecting the user experience.
A powder box is designed, the inner liner is flexiblely connected to the shell through a spring, and the inner liner is cushioned elastically in the shell, combining the cushioning structure of the rubber pad and the spring to prevent the powder from being damaged, and is equipped with intelligent functions such as weight sensors and ultraviolet lamps.
Effectively prevent powder from being damaged during bumps or falling, improve user experience, and also has intelligent functions to improve user convenience and safety.
Smart Images

Figure CN120226852A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cosmetics, and particularly to a powder compact case. Background Art
[0002] Powder compacts are favored by users for their excellent effects such as covering, modifying, fat absorption, and sun protection. They have almost become essential items for users when traveling, so that they can be used at any time. Powder compacts are usually packed in powder compact cases. When carried around, they are easily bumped or dropped by external objects, resulting in damage to the powder in the powder compact case and affecting the user experience. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a powder compact case in view of the deficiencies of the prior art.
[0004] The technical solution of the present invention for solving the above technical problem is as follows: A powder compact case includes: an upper cover, an outer shell, a lining, and a spring. The upper cover is hinged to the outer shell. The lining is located in the outer shell. Two ends of the spring are respectively connected to the outer shell and the lining.
[0005] The beneficial effect of adopting the technical solution of the present invention is that: the lining is flexibly connected to the outer shell through the spring, so that when the powder compact case is bumped or dropped by external objects, the lining elastically sways in the outer shell, thereby buffering the powder in the lining, preventing the powder from being damaged, and improving the user experience.
[0006] Further, a first rubber pad is installed at the bottom of the lining, and a second rubber pad is installed at the bottom of the outer shell. One end of the spring penetrates through the first rubber pad and is connected to the bottom end of the lining, and the other end of the spring penetrates through the second rubber pad and is connected to the bottom of the outer shell.
[0007] The beneficial effect of adopting the above further technical solution is that: the setting of the first rubber pad and the second rubber pad enables the lining to be in flexible contact with the outer shell through the first rubber pad and the second rubber pad when the up-and-down swaying reaches the limit, further buffering the powder in the lining, preventing the powder from being damaged, and improving the user experience.
[0008] Further, there is a gap between the lining and the outer shell. A plurality of tension springs are connected to the peripheral side of the lining, and the plurality of tension springs are respectively connected to the outer shell.
[0009] The beneficial effect of adopting the above further technical solution is that: the setting of the gap facilitates the up-and-down and left-and-right swaying of the lining relative to the outer shell. The left-and-right swaying of the lining is buffered by a plurality of tension springs, thereby buffering the powder in the lining, preventing the powder from being damaged, and improving the user experience.
[0010] Further, the number of the tension springs is 4. The plurality of tension springs are evenly distributed on the circumferential side of the top of the inner lining, and the plurality of tension springs are respectively connected to the inner wall of the top of the outer shell.
[0011] The beneficial effects of adopting the above further technical solution are as follows: The plurality of tension springs are evenly distributed on the circumferential side of the top of the inner lining, so that the inner lining is balanced in force. The left and right shaking of the inner lining is buffered by the plurality of tension springs, so as to buffer the powder cake in the inner lining, prevent the powder cake from being damaged, and improve the user experience.
[0012] Further, a circuit board and an intermediate partition are installed on the upper cover. The upper cover is provided with a plurality of protrusions for installing the intermediate partition and the circuit board and a camera slot for installing a camera. The intermediate partition is connected to the upper cover through the plurality of protrusions. The circuit board is installed between the intermediate partition and the upper cover; A battery slot is installed at the bottom of the outer shell, a battery is installed in the battery slot, and the battery is connected to the circuit board.
[0013] The beneficial effects of adopting the above further technical solution are as follows: The structural design of the upper cover, the circuit board and the intermediate partition facilitates the installation and maintenance of the upper cover, the circuit board and the intermediate partition. It is convenient for the installation and maintenance of the camera, the structure is simple and compact, the integration degree is improved, and the space occupancy rate is reduced. The battery is used to supply power to the circuit board. The battery slot facilitates the stable installation of the battery at the bottom of the outer shell.
[0014] Further, a camera, a display screen, a power switch key and a TYPE-C charging port are installed on the upper cover. A processor and a wireless communication device are installed on the circuit board. The camera, the display screen, the power switch key, the TYPE-C charging port and the wireless communication device are all connected to the processor.
[0015] The beneficial effects of adopting the above further technical solution are as follows: The settings of the camera, the display screen, the power switch key, the TYPE-C charging port, the processor and the wireless communication device facilitate the powder compact box to realize intelligent functions. Improve the user experience.
[0016] Further, the camera is installed in the camera slot; The display screen is installed on the intermediate partition through a third rubber pad; The intermediate partition and the display screen are both provided with a camera opening and a power switch key opening. The camera is located in the camera opening, and the power switch key is located in the power switch key opening; The TYPE-C charging port is located on the side wall of the upper cover, and a dust-proof plug is installed in the TYPE-C charging port. The dust-proof plug is rotatably installed on the upper cover.
[0017] The beneficial effects of adopting the above further technical solutions are as follows: It is convenient for the camera to be stably installed in the upper cover through the camera slot, preventing the camera from shaking. The setting of the third rubber pad enables the display screen to be flexibly connected to the middle partition, preventing the display screen from squeezing the powder puff and having a buffering effect on both the display screen and the powder puff. The settings of the camera opening and the power switch key opening prevent the camera from being blocked and facilitate the user to operate the power switch key. The setting of the TYPE-C charging port facilitates the user to charge the powder puff case. The setting of the dust plug prevents external dust from entering the TYPE-C charging port, improving the stability and reliability of the powder puff case.
[0018] Further, a weight sensor and a support plate for placing the powder puff and the cushion are installed on the inner side of the bottom of the inner liner. The weight sensor is connected to the processor, and the support plate is connected to the weight sensor.
[0019] The beneficial effects of adopting the above further technical solutions are as follows: The weight sensor is used to detect the weight of the powder puff, facilitating the user to be reminded of the remaining amount of the powder puff.
[0020] Further, a timer, a humidity sensor, and a speaker are installed on the circuit board. The timer, the humidity sensor, and the speaker are all connected to the processor. An ultraviolet lamp is installed on the upper cover, and the ultraviolet lamp opening is connected to the processor. Ultraviolet lamp openings are provided on both the middle partition and the display screen, and the ultraviolet lamp is located in the ultraviolet lamp opening.
[0021] The beneficial effects of adopting the above further technical solutions are as follows: The timer and the speaker are used to remind the user of the makeup replenishment time. The humidity sensor and the speaker are used to remind the user whether the storage environment meets the standards, preventing the powder puff from getting damp. The ultraviolet lamp is used to disinfect the powder puff, improving the user experience.
[0022] Further, a vacant cavity for placing the powder puff and the cushion is provided in the inner liner. The bottom of the outer shell is connected to a bottom shell, and the inner wall of the bottom shell is covered with a fourth rubber pad. Magnets are provided at positions on the upper cover away from the hinged position and on the outer shell away from the hinged position. A rubber sealing ring is installed at the docking position between the top of the outer shell and the upper cover.
[0023] The beneficial effects of adopting the above further technical solutions are as follows: The vacant cavity is used to place the powder puff and the cushion. The bottom shell is used to support the outer shell. The fourth rubber pad plays a buffering role for the outer shell. The rubber sealing ring is used to seal the docking position between the outer shell and the upper cover.
[0024] Advantages of additional aspects of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 One of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0026] Figure 2 Two of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0027] Figure 3 Three of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0028] Figure 4 Four of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0029] Figure 5 Five of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0030] Figure 6 Six of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0031] Figure 7 Seven of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0032] Figure 8 Eight of the structural schematic diagrams of a powder puff box provided by an embodiment of the present invention.
[0033] Explanation of the reference numerals in the drawings: 1. Upper cover; 2. Outer shell; 3. Inner lining; 4. Spring; 5. First rubber pad; 6. Second rubber pad; 7. Tensile spring; 8. Circuit board; 9. Intermediate partition; 10. Protrusion; 11. Camera; 12. Camera card slot; 13. Display screen; 14. Power on / off key; 15. TYPE-C charging port; 16. Third rubber pad; 17. Dust plug; 18. Weight sensor; 19. Support plate; 20. Humidity sensor; 21. Ultraviolet lamp; 22. Bottom shell; 23. Fourth rubber pad; 24. Rubber sealing ring; 25. Battery card slot; 26. Battery. Detailed implementation manners
[0034] The principles and features of the present invention will be described below with reference to the accompanying drawings. The illustrated embodiments are only used to explain the present invention and are not intended to limit the scope of the present invention.
[0035] As Figures 1 to 8 shown, an embodiment of the present invention provides a powder puff box, including: an upper cover 1, an outer shell 2, an inner lining 3 and a spring 4. The upper cover 1 is hinged to the outer shell 2. The inner lining 3 is located in the outer shell 2. Two ends of the spring 4 are respectively connected to the outer shell 2 and the inner lining 3.
[0036] The beneficial effects of adopting the technical solution of the present invention are as follows: The inner lining is flexibly connected to the outer shell through a spring. When the powder puff case is bumped or dropped by an external object, the inner lining elastically shakes inside the outer shell, thereby buffering the powder puff in the inner lining and preventing the powder puff from being damaged, improving the user experience.
[0037] Among them, the upper cover, the outer shell, and the inner lining can all be in a cylindrical structure.
[0038] An RFID tag can be installed on the upper cover. Through the RFID tag or other intelligent technologies, the traceability and anti-counterfeiting functions of the powder puff case can be realized.
[0039] The number of springs can be one, and the spring can be in the middle of the outer shell.
[0040] Connection columns for connecting the spring can be provided at the bottom of the inner lining and the bottom of the outer shell, and the spring is connected to the connection column.
[0041] The powder puff case can be composed of three-layer structures: an upper cover, a main body, and a bottom shell; there is a hollow rotating shaft on one side of the upper cover, and 4 bolt structure protrusions (protrusions) and a camera card slot point (camera card slot) are provided on the inner side wall of the upper cover; the circuit board is attached to the upper cover, and the circuit board is fixed at a specific position through the bolt protrusion structure point (protrusion) and the camera card slot point (camera card slot); the upper cover structure (upper cover) is provided with an intermediate partition, and the intermediate partition is combined with the upper cover through bolts to fix the circuit board therein and provide a flat fitting environment for the glass mirror surface (display screen) on the outermost layer of the upper cover; a camera opening and a power on / off key opening are provided on the intermediate partition; a TYPE-C charging port is provided on the outside of the upper cover.
[0042] The main body is composed of two parts: an outer shell and an inner lining.
[0043] One side of the outer shell is connected to the hollow rotating shaft of the upper cover through an opening; at the same time, the inner lining forms a vacant cavity, and powder puffs and cushions can be placed inside the vacant cavity.
[0044] A layer of isolation structure is provided at the bottom of the outer shell, and a snap fastener is provided. The bottom shell of the powder puff case (bottom shell) is fixedly connected to the main body outer shell (outer shell) through the snap fastener.
[0045] The bottom shell is snap-fitted with the main body outer shell (outer shell).
[0046] As Figures 1 to 8 shown, further, a first rubber pad 5 is installed at the bottom of the inner lining 3, a second rubber pad 6 is installed at the bottom of the outer shell 2, one end of the spring 4 penetrates through the first rubber pad 5 and is connected to the bottom end of the inner lining 3, and the other end of the spring 4 penetrates through the second rubber pad 6 and is connected to the bottom of the outer shell 2.
[0047] The beneficial effects of adopting the above further technical solution are as follows: The provision of the first rubber pad and the second rubber pad enables the inner lining to be in flexible contact with the outer shell through the first rubber pad and the second rubber pad when the up-and-down shaking reaches the limit, further buffering the powder cake in the inner lining, preventing the powder cake from being damaged, and improving the user experience.
[0048] As Figures 1 to 8 shown, further, there is a gap between the inner lining 3 and the outer shell 2, and a plurality of tension springs 7 are connected to the peripheral side of the inner lining 3, and the plurality of tension springs 7 are respectively connected to the outer shell 2.
[0049] The beneficial effects of adopting the above further technical solution are as follows: The provision of the gap facilitates the up-and-down and left-and-right shaking of the inner lining relative to the outer shell. The left-and-right shaking of the inner lining is buffered by a plurality of tension springs, thereby buffering the powder cake in the inner lining, preventing the powder cake from being damaged, and improving the user experience.
[0050] Among them, connection rings for connecting the tension springs can be provided on the upper cover and the outer shell, and the tension springs are connected to the connection rings.
[0051] As Figures 1 to 8 shown, further, the number of the tension springs 7 is 4, and the plurality of tension springs 7 are equidistantly distributed on the peripheral side of the top of the inner lining 3, and the plurality of tension springs 7 are respectively connected to the inner wall of the top of the outer shell 2.
[0052] The beneficial effects of adopting the above further technical solution are as follows: The plurality of tension springs are equidistantly distributed on the peripheral side of the top of the inner lining, enabling the inner lining to be balanced in force. The left-and-right shaking of the inner lining is buffered by a plurality of tension springs, thereby buffering the powder cake in the inner lining, preventing the powder cake from being damaged, and improving the user experience.
[0053] As Figures 1 to 8 shown, further, a circuit board 8 and an intermediate partition 9 are installed on the upper cover 1. A plurality of protrusions 10 for installing the intermediate partition 9 and the circuit board 8 and a camera card slot 12 for installing a camera 11 are provided on the upper cover 1. The intermediate partition 9 is connected to the upper cover 1 through the plurality of protrusions 10. The circuit board 8 is installed between the intermediate partition 9 and the upper cover 1. A battery card slot 25 is installed at the bottom of the outer shell 2, and a battery 26 is installed in the battery card slot 25. The battery 26 is connected to the circuit board 8.
[0054] The beneficial effects of adopting the above further technical solution are as follows: The structural design of the upper cover, the circuit board, and the intermediate partition facilitates the installation and maintenance of the upper cover, the circuit board, and the intermediate partition. It is convenient for the installation and maintenance of the camera. The structure is simple and compact, improving the integration degree and reducing the space occupancy rate. The battery is used to supply power to the circuit board. The battery card slot facilitates the stable installation of the battery at the bottom of the outer shell.
[0055] Among them, the battery slot can be located between the fourth rubber pad 23 and the housing 2.
[0056] As Figures 1 to 8 shown, further, a camera 11, a display screen 13, a power on / off key 14, and a TYPE-C charging port 15 are installed on the upper cover 1, and a processor and a wireless communication device are installed on the circuit board 8. The camera 11, the display screen 13, the power on / off key 14, the TYPE-C charging port 15, and the wireless communication device are all connected to the processor.
[0057] The beneficial effects of adopting the above further technical solution are: the settings of the camera, the display screen, the power on / off key, the TYPE-C charging port, the processor, and the wireless communication device facilitate the powder puff box to achieve intelligent functions and improve the user experience.
[0058] Among them, the display screen can be a mirror display screen. Through the design of the circuit structure, it is convenient for the powder puff box to access AI in the prior art and realize more extended functions.
[0059] It should be noted that the control method, analysis method, judgment method, and processing method of the processor are all prior art. According to actual needs, those skilled in the art can easily figure out how to program and implement them, which will not be elaborated here.
[0060] As Figures 1 to 8 shown, further, the camera 11 is installed in the camera slot 12; the display screen 13 is installed on the middle partition 9 through the third rubber pad 16; camera openings and power on / off key openings are provided on both the middle partition 9 and the display screen 13. The camera 11 is located in the camera opening, and the power on / off key 14 is located in the power on / off key opening; the TYPE-C charging port 15 is located on the side wall of the upper cover 1, and a dust-proof plug 17 is installed in the TYPE-C charging port 15. The dust-proof plug 17 is rotatably installed on the upper cover 1.
[0061] The beneficial effects of adopting the above further technical solution are: it is convenient for the camera to be stably installed in the upper cover through the camera slot to prevent the camera from shaking. The setting of the third rubber pad makes the display screen and the middle partition flexibly connected, preventing the display screen from squeezing the powder puff and having a buffering effect on the display screen and the powder puff. The settings of the camera opening and the power on / off key opening prevent the camera from being blocked and facilitate the user to operate the power on / off key. The setting of the TYPE-C charging port facilitates the user to charge the powder puff box. The setting of the dust-proof plug prevents external dust from entering the TYPE-C charging port and improves the stability and reliability of the powder puff box.
[0062] As Figures 1 to 8As shown, further, a weight sensor 18 and a support plate 19 for placing powder puffs and cushions are installed on the inner side of the bottom of the inner liner 3. The weight sensor 18 is connected to the processor, and the support plate 19 is connected to the weight sensor 18.
[0063] The beneficial effect of adopting the above further technical solution is that the weight sensor is used to detect the weight of the powder puff, facilitating the reminder to the user of the remaining amount of the powder puff.
[0064] Through the built-in weight sensor, the remaining amount of the powder puff is monitored, and the user is reminded when it is nearly exhausted.
[0065] As Figures 1 to 8 shown, further, a timer, a humidity sensor 20 and a speaker are installed on the circuit board 8. The timer, the humidity sensor 20 and the speaker are all connected to the processor; a UV lamp 21 is installed on the upper cover 1, and the UV lamp opening is connected to the processor. UV lamp openings are provided on both the intermediate partition 9 and the display screen 13, and the UV lamp 21 is located in the UV lamp opening.
[0066] The beneficial effect of adopting the above further technical solution is that the timer and the speaker are used to remind the user of the makeup replenishment time. The humidity sensor and the speaker are used to remind the user whether the storage environment meets the standard to prevent the powder puff from getting damp. The UV lamp is used to disinfect the powder puff, improving the user experience.
[0067] The environmental humidity, temperature, etc. are monitored through sensors to remind the user to use the powder puff in a suitable environment. The inside of the powder puff case is regularly disinfected through the UV lamp or other disinfection technologies.
[0068] As Figures 1 to 8 shown, further, a vacant cavity for placing powder puffs and cushions is provided in the inner liner 3; the bottom of the outer shell 2 is connected to a bottom shell 22, and a fourth rubber pad 23 is coated on the inner wall of the bottom shell 22; magnets are provided at positions on the upper cover 1 and the outer shell 2 far from the hinged position; a rubber sealing ring 24 is installed at the docking position between the top end of the outer shell 2 and the upper cover 1.
[0069] The beneficial effect of adopting the above further technical solution is that the vacant cavity is used to place powder puffs and cushions. The bottom shell is used to support the outer shell. The fourth rubber pad plays a buffering role for the outer shell. The rubber sealing ring is used to seal the docking position between the outer shell and the upper cover.
[0070] Innovative design of the upper cover: On the basis of the hollow rotating shaft, a magnetic attraction type (magnet) design is added, making the opening and closing of the upper cover more convenient and stable.
[0071] The camera card slot point (camera card slot), in addition to being used to fix the circuit board, can also be designed to be detachable, facilitating consumers to replace camera decorative parts of different styles according to their personal preferences.
[0072] A waterproof and dustproof plug (dustproof plug) is added to the TYPE-C charging port to improve the durability of the product.
[0073] Innovative design of the main body: A shock-absorbing buffer layer is added between the inner lining and the main body of the outer shell (outer shell) to effectively protect the powder puff from external impacts.
[0074] An adjustable partition is added to the empty cavity, allowing consumers to freely adjust the space according to the sizes of products such as powder puffs and cushions, improving the space utilization rate.
[0075] The isolation structure at the bottom of the outer shell is upgraded to a detachable cleaning box, facilitating consumers to clean the residues inside the powder puff box.
[0076] Innovative design of the bottom shell: A hidden LED light strip is added to the bottom shell, which is controlled by a touch switch, providing soft light for makeup and enhancing the makeup experience.
[0077] The snap-fastening combination method between the bottom shell and the main body of the outer shell (outer shell) is upgraded to a dual locking of magnetic attraction + snap-fastening to ensure the stability of the powder puff box during carrying.
[0078] The environmentally friendly and durable ABS material (Acrylonitrile Butadiene Styrene) is selected as the material for the outer shell and inner lining of the powder puff box to ensure the safety and durability of the product.
[0079] High-precision injection molding technology and laser cutting technology are adopted to ensure the precise docking of each component of the powder puff box, improving the overall texture and aesthetics of the product.
[0080] ·Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A powder box, characterized in that: include: An upper cover, an outer shell, an inner lining and a spring, wherein the upper cover is hinged to the outer shell, the inner lining is located in the outer shell, and two ends of the spring are respectively connected to the outer shell and the inner lining.
2. A powder box according to claim 1, characterized in that: A first rubber pad is installed at the bottom of the lining, a second rubber pad is installed at the bottom of the shell, one end of the spring passes through the first rubber pad and is connected to the bottom end of the lining, and the other end of the spring passes through the second rubber pad and is connected to the bottom of the shell.
3. A powder box according to claim 1, characterized in that: There is a gap between the liner and the outer shell, and a plurality of tension springs are connected to the peripheral side of the liner, and the plurality of tension springs are respectively connected to the outer shell.
4. A powder box according to claim 3, characterized in that: The number of the tension springs is 4, and the plurality of tension springs are distributed at equal intervals around the top of the liner, and the plurality of tension springs are respectively connected to the top inner wall of the outer shell.
5. A powder box according to claim 1, characterized in that: A circuit board and a middle partition are installed on the upper cover. The upper cover is provided with a plurality of protrusions for installing the middle partition and the circuit board and a camera slot for installing a camera. The middle partition is connected to the upper cover through a plurality of the protrusions. The circuit board is installed between the middle partition and the upper cover. A battery slot is installed at the bottom of the outer shell. A battery is installed in the battery slot, and the battery is connected to the circuit board.
6. A powder box according to claim 5, characterized in that: A camera, a display screen, a power switch and a TYPE-C charging port are installed on the upper cover, a processor and a wireless communication device are installed on the circuit board, and the camera, the display screen, the power switch, the TYPE-C charging port and the wireless communication device are all connected to the processor.
7. A powder box according to claim 6, characterized in that: The camera is installed in the camera slot; The display screen is mounted on the middle partition through a third rubber pad; a camera opening and a power switch key opening are provided on the middle partition and the display screen, the camera is located in the camera opening, and the power switch key is located in the power switch key opening; the TYPE-C charging port is located on the side wall of the upper cover, and a dust plug is installed in the TYPE-C charging port, and the dust plug is rotatably mounted on the upper cover.
8. A powder box according to claim 6, characterized in that: A weight sensor and a support plate for placing powder cakes and air cushions are installed on the inner side of the bottom of the liner, the weight sensor is connected to the processor, and the support plate is connected to the weight sensor.
9. A powder box according to claim 6, characterized in that: A timer, a humidity sensor and a speaker are installed on the circuit board, and the timer, the humidity sensor and the speaker are all connected to the processor; an ultraviolet lamp is installed on the upper cover, and the ultraviolet lamp opening is connected to the processor. The middle partition and the display screen are both provided with ultraviolet lamp openings, and the ultraviolet lamp is located in the ultraviolet lamp openings.
10. A powder box according to claim 1, characterized in that: The inner lining is provided with an empty cavity for placing powder and air cushion; the bottom of the outer shell is connected to the bottom shell, and the inner wall of the bottom shell is covered with a fourth rubber pad; magnets are provided at the upper cover away from the hinge position and at the outer shell away from the hinge position; a rubber sealing ring is installed at the joint between the top of the outer shell and the upper cover.