charging case
By setting a limiting area on the inner wall of the lower shell of the charging box to limit the magnetic shielding sheet, the problem of difficult installation of wireless charging module is solved, and more convenient assembly and miniaturization design are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SHOKZ CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-29
Smart Images
Figure CN224305458U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic device technology, and in particular to charging boxes. Background Technology
[0002] With the increasing popularity of electronic devices, they have become indispensable social and entertainment tools in people's daily lives, and people's demands for electronic devices are also getting higher and higher. Electronic devices such as headphones and smart glasses are also widely used in people's daily lives. They can be used in conjunction with terminal devices such as mobile phones and computers to provide users with an auditory feast.
[0003] Currently, charging cases for headphones, smartwatches, or smart glasses are usually equipped with wireless charging modules. However, due to the large number of components inside the charging case, the installation of these wireless charging components is often quite difficult. Utility Model Content
[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a charging case, which includes a shell, a battery, a magnetic shielding sheet, and a charging coil. The shell includes a lower shell and a tray, and the lower shell and the tray cooperate to form an accommodating space. The tray has a recessed area for accommodating earphones on the side away from the accommodating space. The battery, the magnetic shielding sheet, and the charging coil are stacked sequentially in the accommodating space along the depth direction of the lower shell. The charging coil is fixed to the side of the magnetic shielding sheet away from the tray, and the battery is fixed to the side of the magnetic shielding sheet facing the tray. A limiting area is provided on the inner wall surface of the lower shell to limit the magnetic shielding sheet.
[0005] In some embodiments, the inner wall surface of the lower housing includes a peripheral region surrounding the limiting region, and a portion of the limiting region is lower than the peripheral region to form a limiting groove. The magnetic shielding sheet includes a main body portion disposed within the limiting groove.
[0006] In some embodiments, a limiting post is provided at the bottom of the limiting groove, and a limiting hole matching the limiting post is provided on the main body.
[0007] In some embodiments, the limiting groove includes a first sub-region, a second sub-region surrounding the periphery of the first sub-region, and a third sub-region surrounding the outer ring of the second sub-region. The second sub-region is lower than the first sub-region and the third sub-region to form a receiving groove. The charging coil is disposed in the receiving groove, and the main body is supported and fixed on the first sub-region and the third sub-region.
[0008] In some embodiments, the charging case includes a circuit board disposed within a receiving space, the circuit board being fixed relative to the lower housing, the circuit board having a mounting notch with an opening at one end, the battery being at least partially located within the mounting notch, and the movable gap between the battery and the circuit board being less than or equal to 0.5 mm in at least one direction perpendicular to the depth direction.
[0009] In some embodiments, the battery has a first end and a second end disposed opposite to each other, the first end being away from the opening end of the mounting notch, and the second end being close to the opening end of the mounting notch, and a limiting baffle for limiting the second end is further provided on the limiting area of the lower housing.
[0010] In some embodiments, the magnetic shielding sheet includes a first extension that extends to a limiting baffle that limits the first extension.
[0011] In some embodiments, the first extension extends between the support platform and the battery.
[0012] In some embodiments, the battery is cuboid, and there are two sets of limiting baffles. The two sets of limiting baffles are respectively arranged corresponding to the two right-angled portions at the second end. Each set of limiting baffles includes a first stop portion and a second stop portion that are perpendicular to each other and used to stop the corresponding right-angled portions.
[0013] In some embodiments, the ratio of the overlap area of the battery and the magnetic shielding sheet to the area of the battery along the depth direction is 1.
[0014] In some embodiments, the charging box further includes a first support pad disposed between the battery and the magnetic shielding sheet, and a second support pad disposed between the charging coil and the magnetic shielding sheet. The two sides of the first support pad are respectively adhered and fixed to the battery and the magnetic shielding sheet, and the two sides of the second support pad are respectively adhered and fixed to the charging coil and the magnetic shielding sheet. The thickness of the first support pad is greater than the thickness of the second support pad.
[0015] In some embodiments, the magnetic shielding sheet includes a first extension, and a support platform for supporting the second end of the battery is provided on the limiting area of the lower housing. The first extension extends between the support platform and the battery, and the first extension and the support platform cooperate with each other so that the side of the first extension facing the battery is flush with the side of the first support pad facing the battery.
[0016] The beneficial effects of this application are as follows: a limiting area is provided on the inner wall surface of the lower housing, the limiting area limits the magnetic shielding sheet, and the battery and charging coil are fixed on the magnetic shielding sheet, so that the lower housing can limit the battery and charging coil by limiting the magnetic shielding sheet, thereby simplifying the installation method of the battery and charging coil, reducing the installation difficulty of the battery and charging coil, and making the charging box easier to assemble. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the overall assembly of the charging box embodiment of this application;
[0018] Figure 2 This is a three-dimensional structural diagram of the charging case embodiment of this application for placing the earphones;
[0019] Figure 3 yes Figure 1 An exploded view of the charging box embodiment shown below;
[0020] Figure 4 yes Figure 1 A schematic diagram of the structure of some components in the charging case embodiment shown, viewed along the depth direction;
[0021] Figure 5 yes Figure 4 A schematic diagram of the cross-section of a portion of the components shown along section line AA;
[0022] Figure 6 yes Figure 4 The diagram shown is an exploded view of some of the components.
[0023] Figure 7 yes Figure 5 A proportionally enlarged structural diagram of region O in some of the components shown;
[0024] Figure 8 yes Figure 3 The diagram shows the assembly structure of the lower shell and the magnetic shielding sheet in the embodiment of the charging box. Detailed Implementation
[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0026] The reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.
[0027] The following is an exemplary description of the charging case in the embodiments.
[0028] Please combine Figure 1 as well as Figure 2The charging case 1 is a device that can be used with other electronic devices and can charge those devices. These other electronic devices can be earphones 2, smartwatches, or smart glasses, etc. For example, the electronic device can be earphones 2. The charging case 1 is compatible with earphones 2, and earphones 2 can be placed in the charging case 1 when the battery is low or they are not in use. The charging case 1 can accommodate the corresponding earphones 2 and charge them.
[0029] In some embodiments, such as Figure 2 as well as Figure 3 As shown, the charging box 1 may include a housing 10, a battery 20, a magnetic shielding sheet 30, and a charging coil 40.
[0030] Among them, such as Figure 2 as well as Figure 3 As shown, the housing 10 may include a lower housing 110 and a tray 120. The lower housing 110 and the tray 120 can cooperate to form a receiving space 101. The tray 120 may have a recessed area 121 for receiving the earphone 2 on the side opposite to the receiving space 101. The recessed area 121 may be adapted to the shape of the earphone 2 so that the earphone 2 can be stably placed in the recessed area 121.
[0031] Battery 20 is an energy storage device that converts internal chemical energy into electrical energy. Battery 20 can power other components inside the charging case 1, and can also charge devices such as earphones 2 or smartwatches placed in the charging case 1. Other components can supply power to battery 20 so that battery 20 can store electrical energy.
[0032] The charging coil 40 is a component located inside the charging case 1 used to implement the wireless charging function. In wireless charging mode, the charging case 1 can be placed on a compatible charging base. The lower shell 110 of the charging case 1 contacts the charging base, and the coil of the charging base generates a corresponding interferometric electromagnetic field. This interferometric electromagnetic field acts on the charging coil 40 inside the charging case 1, causing the charging coil 40 to generate an induced current, thereby enabling the charging coil 40 to charge the battery 20 in the charging case 1. Specifically, the charging coil 40 can be positioned on the side of the magnetic shielding sheet 30 away from the tray 120, so that the charging coil 40 is closer to the lower shell 110. This ensures that when the charging case 1 is placed on the corresponding charging base, the charging coil 40 is within the interferometric electromagnetic field generated by the charging base, making it easier for the charging coil 40 to generate an induced current.
[0033] The magnetic shielding sheet 30 is a component with excellent magnetic permeability. Through its high permeability, it can effectively guide magnetic field lines, thereby effectively blocking or weakening magnetic field leakage and reducing electromagnetic interference. Specifically, the magnetic shielding sheet 30 can be placed between the charging coil 40 and the battery 20, forming a structure in which the charging coil 40, the magnetic shielding sheet 30, and the battery 20 are stacked. The placement of the magnetic shielding sheet 30 can separate the interferometric electromagnetic field located on one side of the charging coil 40 from the battery 20, thereby reducing the interaction between the interferometric electromagnetic field and the surrounding metallic environment, which would cause eddy currents in the surrounding metal and release heat, affecting the battery 20 and reducing the problem of reduced charging efficiency caused by increased temperature around and within the battery 20.
[0034] It should be noted that the stacked arrangement described in this application refers to the parallel central axes of the components on the side with the largest surface area. Specifically, the battery 20, the magnetic shielding sheet 30, and the charging coil 40 are stacked sequentially along the depth direction B of the lower housing 110. That is to say, the outer surfaces of the battery 20, the magnetic shielding sheet 30, and the charging coil 40 with the largest surface areas are parallel to each other, and each of the battery 20, the magnetic shielding sheet 30, and the charging coil 40 has a central axis perpendicular to the outer surface with the largest surface area. These three central axes are arranged in parallel.
[0035] In some embodiments, the magnetic shielding sheet 30 can be made of nanocrystalline materials, such as copper, aluminum, or iron-based nanocrystalline materials. Nanocrystalline materials are composed of crystals with nanoscale dimensions (1–10 nm). They possess excellent magnetic properties, effectively isolating magnetic fields and reducing magnetic interference. Furthermore, nanocrystalline materials exhibit higher hardness and strength, making the magnetic shielding sheet 30 less prone to breakage under stress. Of course, in other embodiments, the magnetic shielding sheet 30 can also be made of non-magnetic or weakly magnetic materials such as plastic or rubber; these will not be specifically listed here.
[0036] like Figures 3 to 5 As shown, the battery 20, the magnetic shielding sheet 30, and the charging coil 40 can be sequentially stacked in the receiving space 101 along the depth direction of the lower housing 110. The tray 120 can overlap the opening end of the lower housing 110. The depth direction of the lower housing 110 is the direction away from the opening of the lower housing 110 in the spacing direction between the lower housing 110 and the tray 120. As an example, the depth direction of the lower housing 110 can be as follows: Figure 5 The direction indicated by the middle arrow B.
[0037] like Figure 5As shown, the charging coil 40 can be located on the side of the magnetic shielding sheet 30 away from the tray 120. The battery 20 can be located on the side of the magnetic shielding sheet 30 facing the tray 120. In other words, the charging coil 40 and the battery 20 are located on opposite sides of the magnetic shielding sheet 30 along the depth direction of the lower housing 110.
[0038] When the charging box 1 is placed on the corresponding charging base, the electromagnetic field generated by the charging base will generate electron eddy currents when it encounters the surrounding metal environment, and then release heat by interacting with the surrounding metal environment. Therefore, the electromagnetic field generated by the charging base will not only cause the charging coil 40 to generate induced current, but also cause the temperature of the battery 20 and the area around the battery 20 to rise, thereby affecting the charging efficiency of the battery 20.
[0039] The charging coil 40 is usually located on the side of the AC electromagnetic field near the charging base. Therefore, by placing the battery 20 on the side of the magnetic shielding sheet 30 away from the charging coil 40, the magnetic shielding sheet 30 can block or weaken the AC electromagnetic field transmitted to the battery 20, thereby reducing the impact of the AC electromagnetic field on the battery 20 and preventing it from heating up. This reduces the possibility of the battery 20 being damaged due to excessive temperature or affecting charging efficiency.
[0040] In some embodiments, such as Figure 6 As shown, a limiting area 111 can be provided on the inner wall surface of the lower housing 110, and the limiting area 111 can limit the magnetic shielding sheet 30.
[0041] Since the charging coil 40 and the battery 20 are respectively fixed on both sides of the magnetic shielding sheet 30, and the magnetic shielding sheet 30 can be limited to the inner wall surface of the lower housing 110 by the limiting area 111, the charging coil 40 and the battery 20 can be limited to the inner wall surface of the lower housing 110 by the magnetic shielding sheet 30 and the limiting area 111.
[0042] Specifically, during the assembly of the charging box 1, the charging coil 40 and the battery 20 can be fixed to both sides of the magnetic shielding sheet 30 to form a wireless charging module. Then, the wireless charging module is installed on the inner wall of the lower housing 110. The limiting area 111 of the inner wall limits the magnetic shielding sheet 30, thereby limiting the charging coil 40 and the battery 20, so as to fix the magnetic shielding sheet 30, the charging coil 40 and the battery 20 to the inner wall of the lower housing 110.
[0043] Alternatively, during the assembly of the charging case 1, the charging coil 40 can be placed in the corresponding position on the lower housing 110 along the depth direction B. Then, the magnetic shielding sheet 30 can be placed on the limiting area 111, and the charging coil 40 can be fixed to the magnetic shielding sheet 30. Next, the battery 20 can be placed along the depth direction B on the side of the magnetic shielding sheet 30 away from the charging coil 40, and the battery 20 can be fixed to the magnetic shielding sheet 30. Therefore, the limiting area 111 can limit the battery 20 and the magnetic shielding sheet 30 by limiting the magnetic shielding sheet 30. Moreover, since the battery 20 and the charging coil 40 are fixed to the magnetic shielding sheet 30, the magnetic shielding sheet 30 and the limiting area 111 can limit the battery 20 and the charging coil 40 in the depth direction B and in the direction perpendicular to the depth direction B.
[0044] This configuration allows the lower housing 110 to limit the battery 20 and the charging coil 40 by limiting the magnetic shielding sheet 30, thereby simplifying the installation of the battery 20 and the charging coil 40, reducing the installation difficulty of the battery 20 and the charging coil 40, and making the charging box 1 easier to assemble.
[0045] In some embodiments, such as Figure 5 as well as Figure 6 As shown, the inner wall surface of the lower housing 110 may include a peripheral region 112 surrounding the limiting region 111. A portion of the limiting region 111 may be lower than the peripheral region 112 to form a limiting groove 1111. The magnetic shielding sheet 30 may include a main body 310, which may be disposed within the limiting groove 1111.
[0046] The shape of the main body 310 can be adapted to the shape of the limiting groove 1111, so that the limiting groove 1111 can limit the main body 310, thereby facilitating the installation of the magnetic shielding sheet 30. In some embodiments, the charging coil 40 can also be installed in the limiting groove 1111. The shape of the charging coil 40 can also be further adapted to the shape of the limiting groove 1111, so that the limiting groove can limit the charging coil 40, and also facilitate the installation of the charging coil 40.
[0047] This design allows the inner wall of the lower housing 110 to accommodate the magnetic shielding sheet 30 without excessively increasing the volume of the charging case 1 along its depth. This reduces the space occupied by the magnetic shielding sheet 30, improves the space utilization within the housing, and makes the charging case 1 more compact. This makes the charging case 1 easier for users to handle and carry, thus enhancing the user experience. Furthermore, the lower housing 110 itself can limit the movement of the magnetic shielding sheet 30, simplifying the limiting structure within the lower housing 110 and thus simplifying the structure of the charging case 1. This makes the charging case 1, which contains the wireless charging module, easier to assemble.
[0048] In some embodiments, please combine Figure 6 A limiting post 11111 can be provided at the bottom of the limiting groove 1111, and a limiting hole 311 matching the limiting post 11111 can be provided on the main body 310. When the main body 310 is accommodated in the limiting groove 1111, the limiting post 11111 is set in the limiting hole 311. The limiting post 11111 can further limit the main body 310, and at the same time, it can play a positioning role when installing the magnetic shielding sheet 30, so that the magnetic shielding sheet 30 is not easy to shift, so that the wireless charging function of the charging box 1 is more stable.
[0049] In some embodiments, the number of limiting posts 11111 can be multiple, and the number of limiting holes 311 can also be multiple. For example, the number of limiting posts 11111 can be 2, 3, 4, or 5, and the number of limiting holes 311 can also be 2, 3, 4, or 5, respectively. By setting multiple limiting posts 11111 and multiple limiting holes 311, the magnetic shielding sheet 30 can be better fixed in the lower housing 110, preventing the magnetic shielding sheet 30 from shifting, thereby further improving the structural stability of the charging box 1.
[0050] In some embodiments, such as Figure 6 as well as Figure 7 As shown, the limiting groove 1111 may include a first sub-region 11112, a second sub-region 11113 surrounding the periphery of the first sub-region 11112, and a third sub-region 11114 surrounding the outer ring of the second sub-region 11113.
[0051] The second sub-region 11113 may be lower than the first sub-region 11112 and the third sub-region 11114 to form a receiving groove 11115. The charging coil 40 may be disposed in the receiving groove 11115, and the main body 310 is supported and fixed on the first sub-region 11112 and the third sub-region 11114.
[0052] Specifically, the first sub-region 11112 is located in the middle of the limiting groove 1111, and the third sub-region 11114 is located at the outermost edge of the limiting groove 1111. Therefore, when the main body 310 of the magnetic shielding sheet 30 is accommodated in the limiting groove 1111, the central region of the main body 310 can be supported on the first sub-region 11112, and the edge region of the main body 310 can be supported on the third sub-region 11114, thereby reducing or avoiding the occurrence of depression deformation at the middle and edge positions of the main body 310.
[0053] The charging coil 40 can be disposed in the receiving groove 11115 formed in the second sub-region 11113, and the receiving groove 11115 can limit the charging coil 40 so that the charging coil 40 is more firmly fixed to the bottom surface of the inner wall of the lower housing 110, while reducing the amount of internal space occupied by the charging coil 40.
[0054] Furthermore, a portion of the main body 310 can also be supported on the charging coil 40, thereby ensuring good stability and consistency of the main body 310 as a whole, stably shielding electromagnetic interference, ensuring the normal operation of the wireless charging function of the charging box 1, and improving the user experience.
[0055] In some embodiments, such as Figure 5 As shown, the lower housing 110 may include a bottom wall 114 and a side wall 115, with the side wall 115 surrounding the periphery of the bottom wall 114. The inner wall surface of the lower housing 110 is disposed on the side of the bottom wall 114 facing the receiving space 101. A limiting area 111 on the inner wall surface is located in the middle of the bottom wall 114, and a portion of the peripheral area 112 surrounds the periphery of the limiting area 111 on the inner wall surface. The peripheral area 112 extends from the bottom wall 114 to the side wall 115.
[0056] In some embodiments, such as Figure 7 As shown, to ensure that the magnetic shielding sheet 30 can better shield electromagnetic interference located on one side of the charging coil 40, the projected edge of the magnetic shielding sheet 30 on the reference plane can extend beyond the projected edge of the charging coil 40 on the reference plane. In other words, when viewed along the depth direction B, the magnetic shielding sheet 30 can completely cover the charging coil 40. Furthermore, the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 is not less than 2mm. For example, the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, or 5.5mm, etc.
[0057] The reference plane FH is perpendicular to the depth direction B of the lower housing 110. As an example, the reference plane can be as follows: Figure 7 As shown in the middle surface FH. The minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 can be as follows: Figure 7 The mid-distance L1 is shown.
[0058] It should be noted that the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 on the reference plane FH refers to the closest distance between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 on the reference plane FH.
[0059] In some embodiments, the projected shapes of the magnetic shielding sheet 30 and the charging coil 40 on the reference plane can be approximately circular or annular. In this case, the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 can be the radius difference of the circle or the annular shape.
[0060] In some embodiments, the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 can be between 2 mm and 5.5 mm.
[0061] If the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 on the reference plane FH is less than 2mm, it means that the edge of the magnetic shielding sheet 30 is very close to the edge of the charging coil 40. In this case, the shielding function of the magnetic shielding sheet 30 on the magnetic field located on the side of the charging coil 40 is weak, which can easily have an adverse effect on the battery 20 and circuit board located on the side of the magnetic shielding sheet 30 away from the charging coil 40, such as the temperature rising leading to a decrease in the charging efficiency of the battery 20.
[0062] Considering the miniaturization of the charging case 1 and user experience requirements, the shape of the lower shell 110 is typically configured such that the shell gradually rises from the outer perimeter area 112 on the bottom wall 114 along the opposite direction of the depth B to form the side wall 115. Furthermore, to avoid stress concentration, such as... Figure 5 As shown, the outer perimeter 112 of the bottom wall 114 and the outer perimeter 112 of the side wall 115 of the lower housing 110 are typically rounded. When the magnetic shielding sheet 30 and the charging coil 40 are stacked along the depth direction B on the inner wall surface of the bottom wall 114, the edges of the magnetic shielding sheet 30 and the charging coil 40 are typically positioned at the corresponding rounded corners of the lower housing 110.
[0063] If the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 on the reference plane FH exceeds 5.5mm, it indicates that the area of the magnetic shielding sheet 30 is large. In this case, to ensure the installation requirements of the magnetic shielding sheet 30, the shell size of the charging box 1 in the direction perpendicular to the depth direction B needs to be increased, or the shell thickness of the rounded corner area needs to be thinned. The former will increase the volume of the charging box 1, affecting the user experience, while the latter will make the rounded corner area of the lower shell 110 thinner, affecting the shell rigidity and deformation resistance in this area.
[0064] Therefore, setting the minimum difference between the projected edge of the magnetic shielding sheet 30 and the projected edge of the charging coil 40 to be between 2mm and 5.5mm not only increases the shielding effect of the magnetic shielding sheet 30 on the magnetic field located on one side of the charging coil 40, thereby reducing the impact of the magnetic field located on one side of the charging coil 40 on the battery 20 and circuit board 50, but also eliminates the need to thin the rounded corner area in the lower housing 110, thus ensuring the thickness of the lower housing 110 and increasing its rigidity and resistance to deformation. It also reduces the size of the lower housing 110, making it easier to miniaturize the charging box 1.
[0065] In some embodiments, the magnetic shielding sheet 30 may include multiple layers of sub-magnetic shielding sheets. The number of sub-magnetic shielding sheets may be between 3 and 8 layers. For example, the number of sub-magnetic shielding sheets may be 3, 4, 5, 6, 7, or 8 layers.
[0066] If the number of sub-magnetic shielding sheets is less than 3 layers, the overall thickness of the magnetic shielding sheet 30 will be too thin, resulting in poor magnetic shielding effect. If the number of sub-magnetic shielding sheets is greater than 8 layers, the thickness of the magnetic shielding sheet 30 will be too thick, causing it to occupy a large space in the accommodating space 101, affecting the dimensions of the lower housing 110 in the depth direction B, and also increasing the manufacturing cost of the charging box 1.
[0067] Therefore, setting the number of sub-magnetic shielding sheets between 3 and 8 layers can not only ensure that the magnetic shielding effect of the magnetic shielding sheet 30 is strong enough, but also reduce the situation where the size of the magnetic shielding sheet 30 in the depth direction B is too large and affects the size of the charging box 1 in the depth direction B, and also reduce the manufacturing cost of the charging box 1.
[0068] In some embodiments, the thickness of the magnetic shielding sheet 30 can be between 0.05mm and 0.25mm. For example, the thickness of the magnetic shielding sheet 30 can be 0.05mm, 0.07mm, 0.1mm, 0.15mm, 0.2mm, or 0.25mm.
[0069] If the thickness of the magnetic shielding sheet 30 is less than 0.05mm, it will be too thin and its magnetic shielding effect will be poor. If the thickness of the magnetic shielding sheet 30 is greater than 0.25mm, it will be too thick and occupy a large space in the accommodating space 101, affecting the dimensions of the lower housing 110 in the depth direction B, and also increasing the manufacturing cost of the charging box 1.
[0070] Therefore, setting the thickness of the magnetic shielding sheet 30 between 0.05mm and 0.25mm can not only enhance the magnetic shielding effect of the magnetic shielding sheet 30, but also reduce the space occupied by the magnetic shielding sheet 30 in the accommodating space 101, and also reduce the manufacturing cost of the charging box 1.
[0071] In some embodiments, such as Figure 3 , Figure 4 as well as Figure 5 As shown, the charging box 1 may include a circuit board 50 disposed within the receiving space 101.
[0072] Circuit board 50 refers to the control core inside the charging box 1. Circuit board 50 can be a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit Board), etc. Circuit board 50 can be electrically connected to battery 20, and battery 20 can supply power to circuit board 50.
[0073] like Figure 3 , Figure 4 as well as Figure 6 As shown, in order to ensure the miniaturization of the charging case 1 and improve space utilization, the circuit board 50 can be arranged along the circumference of the battery 20 and at least partially surround the battery 20.
[0074] In some embodiments, such as Figure 3 , Figure 5 as well as Figure 6 As shown, the magnetic shielding sheet 30 may include a first extension 320. The projection of the battery 20 and the peripheral region 112 on the reference plane FH partially overlaps, and the first extension 320 may extend between the battery 20 and the peripheral region 112. The first extension 320 may be connected to the main body 310 and extends from the connection end with the main body 310 in a direction away from the main body 310.
[0075] Specifically, such as Figure 5 As shown, when viewed along the depth direction B, a portion of the battery 20 overlaps with the limiting region 111, and another portion of the battery 20 extends to the peripheral region 112. The portion of the battery 20 that overlaps with the limiting region 111 can be separated from the magnetic field of the side of the magnetic shielding sheet 30 opposite to the support plate 120 by the main body 310 of the magnetic shielding sheet 30, and the portion of the battery 20 that overlaps with the peripheral region 112 can be separated from the magnetic field of the side of the magnetic shielding sheet 30 opposite to the support plate 120 by the first extension 320 of the magnetic shielding sheet 30.
[0076] This setup further enhances the shielding effect on the magnetic field on one side of the charging coil 40, thereby reducing the adverse effects of the AC electromagnetic field on the battery 20, preventing the temperature on one side of the battery 20 and the circuit board 50 from becoming too high, thus improving the charging efficiency of the battery 20 and ensuring the normal operation of the circuit board 50.
[0077] In some embodiments, along the depth direction B, the ratio of the overlapping area of the battery 20 and the magnetic shielding sheet 30 to the area of the battery 20 is 1. In other words, the projection of the battery 20 onto the reference plane FH falls within the projection of the magnetic shielding sheet 30 onto the reference plane FH. This configuration enhances the magnetic shielding effect of the magnetic shielding sheet 30 on the battery 20, reduces the impact of the AC electromagnetic field on the side of the magnetic shielding sheet 30 facing away from the battery 20, and thus reduces the possibility of heating the battery 20, thereby improving the charging efficiency of the battery 20.
[0078] In some embodiments, such as Figure 5 As shown, the connection between the outer periphery 112 and the projection overlap area of the battery 20 and the limiting area 111 can be inclined, and the connection between the first extension 320 and the main body 310 can be inclined (not shown in the figure).
[0079] As an example, the inclined transition can be an arc transition. Of course, in other embodiments, the inclined transition can be an irregularly shaped inclined transition, or a sloped inclined transition, etc.
[0080] Specifically, along the depth direction B, since the limiting area 111 in the lower housing 110 is lower than the peripheral area 112, the inner wall surface of the lower housing 110 exhibits a configuration where the middle limiting area 111 is sunken while the surrounding peripheral area 112 is raised. The first extension 320 needs to extend in the area of the peripheral area 112 corresponding to the battery 20, which causes the lower housing 110 at the connection between the limiting area 111 and the peripheral area 112 to present a sharp right angle area, resulting in stress concentration problems.
[0081] Therefore, by setting the connection between the overlapping area of the projection of the outer perimeter 112 corresponding to the battery 20 and the limiting area 111 as an inclined transition, it can be ensured that the lower housing 110 area at the connection between the limiting area 111 and the outer perimeter 112 corresponding to the battery 20 has a smooth transition, thereby enhancing the structural stability of the lower housing 110 and ensuring the strength of the lower housing 110.
[0082] In some embodiments, such as Figures 3 to 6 As shown, the circuit board 50 can be fixed relative to the lower housing 110, and the circuit board 50 can be provided with a mounting notch 510 with an opening at one end. The battery 20 can be at least partially located within the mounting notch 510, thereby enabling the circuit board 50 to be arranged circumferentially around the battery 20 and at least partially surround the battery 20.
[0083] In some embodiments, the movable gap between the battery 20 and the circuit board 50 is less than or equal to 0.5 mm in at least one direction perpendicular to the depth direction B.
[0084] As an example, the first direction can be as follows: Figure 4As shown in direction C, in the first direction C perpendicular to the depth direction B, the movable gap between the battery 20 and the circuit board 50 can be as follows: Figure 4 The distance L2 is shown in the figure. The movable gap L2 between the battery 20 and the circuit board 50 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm, etc.
[0085] This design allows the mounting notch 510 to position and limit the battery 20 during installation, facilitating battery installation and improving space utilization by ensuring a smaller gap. If the clearance between the battery 20 and the circuit board 50 is greater than 0.5mm in at least one direction perpendicular to the depth direction B, the distance between them will be too wide, making it easy for the battery 20 to move within the mounting notch 510 and difficult to align. This not only reduces the limiting effect of the circuit board 50 on the battery 20 but also increases the difficulty of fitting the battery 20 into the mounting notch 510. Conversely, if the clearance between the battery 20 and the circuit board 50 is zero, collisions and wear are likely to occur during installation, further increasing the difficulty of installation.
[0086] In some embodiments, such as Figures 4 to 6 As shown, the battery 20 may have a first end 210 and a second end 220 disposed opposite to each other. The first end 210 is away from the opening end of the mounting notch 510, and the second end 220 is close to the opening end of the mounting notch 510. The second end 220 overlaps with the projection of the peripheral region 112 on the reference plane FH. That is, the first end 210 of the battery 20 overlaps with the projection of the limiting region 111 on the reference plane FH, and the second end 220 of the battery 20 is provided to extend into the area corresponding to the peripheral region 112.
[0087] This configuration allows the battery 20 to be offset towards the outer perimeter 112 relative to the lower housing 110. On the one hand, it allows a portion of the battery 20 to be kept away from the area with the strongest AC electromagnetic field in the direction perpendicular to the depth direction B. On the other hand, it allows the battery 20 to be offset to one side in the housing space 101, leaving more space on the other side, so that the circuit board 50 has more space to install electronic components, thereby improving the space utilization rate in the housing space 101.
[0088] In some embodiments, such as Figure 4 as well as Figure 6As shown, the limiting area 111 can be further provided with a limiting baffle 1122, which is used to limit the second end 220 of the battery 20. This setting can further restrict the degree of freedom of the battery 20 in the direction perpendicular to the depth direction B, ensuring that the battery 20 can be stably installed in the charging box 1 and that the battery 20 can provide stable power.
[0089] In some embodiments, such as Figures 6 to 8 As shown, the first extension 320 can extend to the limiting baffle 1122, which can limit the first extension 320. This arrangement allows the limiting baffle 1122 to determine the position of the first extension 320, facilitating the installation of the magnetic shielding sheet 30.
[0090] In some embodiments, such as Figure 6 As shown, the battery 20 can be cubic. There can be two sets of limiting baffles 1122. The two sets of limiting baffles 1122 can be respectively set to correspond to the two right-angled portions of the second end 220. Each set of limiting baffles 1122 includes a first stop portion 11221 and a second stop portion 11222 for stopping the mutually perpendicular right-angled portions.
[0091] Specifically, the two right-angled portions of the first end 210 of the battery 20 correspond to the mounting notch 510, and the two right-angled portions of the second end 220 of the battery 20 are exposed outside the mounting notch 510 and are limited by two sets of limiting baffles 1122. The first stop portion 11221 and the second stop portion 11222 of the limiting baffle 1122 are perpendicular to each other to form a right angle, so that the limiting baffle 1122 can adapt to the right-angled portions of the battery 20, thereby limiting the battery 20 and making it easier to install the battery 20.
[0092] By using two sets of limiting baffles 1122 to limit the two right-angled portions of the second end 220 of the battery 20, the battery 20 can be limited in three directions, so that the battery 20 can be installed more stably in the housing space 101, thereby improving the structural stability of the charging box 1.
[0093] In some embodiments, such as Figure 3As shown, the charging case 1 may further include a first support pad 60 disposed between the battery 20 and the magnetic shielding sheet 30, and a second support pad 70 disposed between the charging coil 40 and the magnetic shielding sheet 30. The two sides of the first support pad 60 are respectively adhered and fixed to the battery 20 and the magnetic shielding sheet 30, and the two sides of the second support pad 70 are respectively adhered and fixed to the charging coil 40 and the magnetic shielding sheet 30. The thickness of the first support pad 60 may be greater than the thickness of the second support pad 70. As an example, both the first support pad 60 and the second support pad 70 may be double-sided adhesive or foam. Alternatively, in other embodiments, the first support pad 60 and the second support pad 70 may be made of materials with adhesive properties, such as plastic or silicone.
[0094] It should be noted that the thickness of the first support pad 60 is the dimension of the first support pad 60 in the depth direction B, and the thickness of the second support pad 70 is the dimension of the second support pad 70 in the depth direction B.
[0095] Specifically, the first support pad 60 is disposed between the battery 20 and the magnetic shielding sheet 30. Therefore, by setting the thickness of the first support pad 60 to be relatively large, the heat transfer from the AC electromagnetic field to the battery 20 can be reduced. At the same time, when the charging coil 40 is located in the AC electromagnetic field and generates an induced current, the charging coil 40 will also generate heat. Therefore, the thicker first support pad 60 can also better reduce the heat transfer from the charging coil 40 to the battery 20.
[0096] The second support pad 70 is positioned between the charging coil 40 and the magnetic shielding sheet 30. If the thickness of the second support pad 70 is too large, it will affect the magnetic focusing effect of the magnetic shielding sheet 30 on the AC electromagnetic field. Therefore, setting the thickness of the first support pad 60 to be greater than the thickness of the second support pad 70 can ensure the magnetic focusing effect of the magnetic shielding sheet 30 and the wireless charging performance of the charging box 1, while reducing heat transfer to the battery 20 and ensuring the charging efficiency of the battery 20.
[0097] In some embodiments, such as Figure 6 as well as Figure 7 As shown, the limiting area 111 may be provided with a support platform 1121 for supporting the second end 220, and the first extension 320 may extend between the support platform 1121 and the battery 20. The first extension 320 and the support platform 1121 cooperate with each other so that the side of the first extension 320 facing the battery 20 is flush with the side of the first support pad 60 facing the battery 20.
[0098] Specifically, the first extension 320 and the support platform 1121 can cooperate with each other so that the first extension 320 is raised in the opposite direction of the depth direction B, so that the side of the first extension 320 facing the battery 20 is flush with the side of the first support pad 60 facing the battery 20. When the battery 20 is installed on the inner wall of the lower housing 110, the second end of the battery 20 can be placed on the first extension 320 and supported by the first extension 320 and the support platform 1121, while the rest of the battery 20 can be supported by the first support pad 60.
[0099] With this configuration, the support platform 1121, the first extension 320, and the first support pad 60 together support the battery 20, thereby making the battery 20 more stably placed in the housing space 101 and improving the structural stability of the charging box 1. Extending the first extension 320 to the corresponding position at the second end of the battery 20 also strengthens the magnetic shielding effect of the magnetic shielding sheet 30 on the battery 20, reducing the adverse effects of the AC electromagnetic field on the side of the magnetic shielding sheet 30 facing away from the tray 120 on the battery 20, thus preventing the battery 20 from overheating and improving the charging efficiency of the battery 20.
[0100] In some embodiments, the limiting baffle 1122 may be disposed on a portion of the periphery of the support platform 1121, and the limiting baffle 1122 may further limit the first extension 320, thereby facilitating the installation of the magnetic shielding sheet 30 in the lower housing 110.
[0101] In some embodiments, the magnetic shielding sheet 30, the second support pad 70, and the charging coil 40 can be sequentially adhered to form a wireless module. The wireless module can be adhered to the limiting groove 1111 by the charging coil 40 to achieve more convenient installation.
[0102] Specifically, during the preparation and assembly of the charging box 1, the magnetic shielding sheet 30, the second support pad 70 and the charging coil 40 can be bonded together in sequence to form a wireless module. Then, the wireless module is installed in the limiting groove 1111 by adhering the charging coil 40 to the limiting groove 1111.
[0103] This configuration allows the wireless charging system of the charging box 1 to form a modular structure. During assembly, there is no need to position and calibrate each component. It is only necessary to ensure the assembly accuracy of the magnetic shielding sheet 30 and the charging box 1 or the assembly accuracy of the charging coil 40 and the charging box 1 to achieve stable assembly of the entire wireless charging module. This can greatly reduce the assembly difficulty of the charging box 1 and improve the production efficiency of the charging box 1.
[0104] In some embodiments, a first support pad 60 and a battery 20 can be added to the wireless module to form a wireless charging module. In other words, the battery 20, the first support pad 60, the magnetic shielding sheet 30, the second support pad 70, and the charging coil 40 can be sequentially adhered and stacked to form a wireless charging module, so that the battery 20 can be installed on the inner wall of the lower housing 110 through the magnetic shielding sheet 30 or the magnetic shielding sheet 30, which can greatly reduce the assembly difficulty of the charging box 1.
[0105] In some embodiments, such as Figure 3 As shown, a charging interface 520 is provided on the circuit board 50. The charging interface 520 can be a USB interface or a Type-C interface, etc. The cable of an external device can be inserted into the charging interface 520 to achieve a conductive connection with the circuit board 50. After the cable of the external device is inserted into the charging interface and electrically connected to the circuit board 50, power can be supplied to the battery 20 through the circuit board 50 to charge the battery 20.
[0106] like Figure 3 , Figure 6 as well as Figure 8 As shown, the magnetic shielding sheet 30 can further extend to the side of the charging interface 520 opposite to the tray 120, and the projection of the magnetic shielding sheet 30 on the reference plane FH perpendicular to the depth direction B can at least partially overlap with the projection of the charging interface 520 on the reference plane FH. In other words, when observing the interior of the receiving space 101 along the depth direction B, the magnetic shielding sheet 30 and the charging interface 520 can present an arrangement that at least partially overlaps.
[0107] When the charging box 1 is wirelessly charging, the AC electromagnetic field is usually located on the side of the charging coil 40 away from the magnetic shielding sheet 30. In order to ensure that the AC electromagnetic field does not interact with the surrounding metal environment and thus consume heat, causing other components such as the battery 20 to overheat, the charging interface 520 and the battery 20 need to be placed on the side of the magnetic shielding sheet 30 close to the tray 120. At the same time, it is necessary to ensure that the magnetic shielding sheet 30 can at least partially isolate the charging interface 520 and the AC electromagnetic field, so as to reduce the adverse effects of the AC electromagnetic field on the charging interface 520 and the battery 20, and reduce the possibility of damage or reduced charging efficiency due to excessive temperature of the charging interface 520 and the battery 20.
[0108] In some embodiments, on the reference plane FH, the ratio between the overlapping area of the projection of the charging interface 520 and the projection of the magnetic shielding sheet 30 and the area of the projection of the charging interface 520 can be greater than or equal to 80%. In other words, when viewed in the depth direction B, the charging interface 520 has at least 80% of its area overlapping with the magnetic shielding sheet 30.
[0109] If the ratio between the projected overlap area of the charging interface 520 and the magnetic shielding sheet 30 and the projected area of the charging interface 520 is less than 80%, it indicates that the overlap area between the charging interface 520 and the magnetic shielding sheet 30 in the depth direction B is too small. This results in poor magnetic shielding effect of the magnetic shielding sheet 30 near the charging interface 520. The AC electromagnetic field on the side of the charging coil 40 will radiate to the charging interface 520 in a large area through the area not shielded by the magnetic shielding sheet 30, and then interact with the metal environment on the side of the charging interface 520, causing the temperature of the charging interface 520 to rise. This can damage the charging interface 520 or result in low charging efficiency when using wired charging.
[0110] Therefore, on the reference plane FH, setting the ratio between the overlapping area of the projection of the charging interface 520 and the projection of the magnetic shielding sheet 30 and the area of the projection of the charging interface 520 to be greater than or equal to 80% can improve the magnetic shielding effect of the magnetic shielding sheet 30 on the charging interface 520, thereby reducing the influence of the AC electromagnetic field on the charging interface 520 and preventing it from heating up. This reduces the possibility of the charging interface 520 being damaged due to excessive temperature or affecting charging efficiency, ensuring that the charging box 1 can be charged in both wireless charging mode and wired charging mode.
[0111] In some embodiments, the maximum distance between the charging interface 520 and the magnetic shielding sheet 30 in the depth direction B is no greater than 4 mm. For example, the maximum distance between the charging interface 520 and the magnetic shielding sheet 30 in the depth direction B can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm, etc.
[0112] If the maximum distance between the charging interface 520 and the magnetic shielding sheet 30 in the depth direction B is greater than 4mm, it means that the distance between the charging interface 520 and the magnetic shielding sheet 30 is too far, which will increase the size of the charging box 1 in the depth direction B, thus hindering the miniaturization of the charging box 1.
[0113] Therefore, setting the maximum distance between the charging port 520 and the magnetic shielding sheet 30 in the depth direction B to no more than 4mm can make the distance between the charging port 520 and the magnetic shielding sheet 30 closer, thereby reducing the size of the charging box 1 in the depth direction B, making the charging box 1 more compact, and thus making the charging box 1 easier for users to pick up and carry, thereby improving the user experience.
[0114] In some embodiments, such as Figure 3 , Figure 6 as well as Figure 8As shown, the magnetic shielding sheet 30 may include a second extension 330. The first extension 320 and the second extension 330 may be connected to the main body 310 respectively, and both extend from the connection end with the main body 310 in a direction away from the main body 310.
[0115] The second extension 330 extends between the charging interface 520 and the peripheral area 112. The projections of the charging interface 520 and the second extension 330 on the reference plane FH at least partially overlap.
[0116] This design can enhance the magnetic shielding effect of the magnetic shielding sheet 30 on the charging interface 520, and at the same time, divide the magnetic shielding sheet 30 into different areas to facilitate the magnetic shielding sheet 30 to adapt to the shape of the inner wall of the lower housing 110. This can improve the compatibility between the magnetic shielding sheet 30 and the lower housing 110, increase space utilization, and reduce the manufacturing cost of the magnetic shielding sheet 30.
[0117] In some embodiments, such as Figure 6 as well as Figure 8 As shown, the outer perimeter 112 may be provided with supporting ribs 1123. Observed along the depth direction B, the charging interface 520 is located between the supporting ribs 1123. The second extension 330 is provided with a clearance notch 331 for avoiding the supporting ribs 1123. Specifically, the supporting ribs 1123 can limit the charging interface 520 from a direction perpendicular to the depth direction B, thereby making the structure of the charging interface 520 relative to the charging box 1 more stable. When the user plugs or unplugs the charging cable connected to the charging interface 520, the charging interface 520 will not be damaged, detached, or displaced.
[0118] Furthermore, by providing a clearance notch 331 on the second extension 330 to avoid the support rib 1123, the first extension can easily avoid the support rib 1123 and be disposed on the inner wall of the outer periphery area 112 of the lower housing 110. Moreover, the support rib 1123 can limit the second extension 330 through the clearance notch 331, so that the second extension 330 is not easy to move, thus ensuring the magnetic shielding effect of the magnetic shielding sheet 30 on the charging interface 520.
[0119] In some embodiments, such as Figure 8As shown, the lower housing 110 is provided with a mounting hole 113 corresponding to the charging interface 520. The mounting hole 113 connects the receiving space 101 and the space outside the lower housing 110. One end of the charging interface 520 is mounted on the main board of the circuit board 50, and the other end is mounted in the mounting hole 113. The charging interface of the external device can be inserted into or removed from the charging interface 520 through the mounting hole 113. The shape of the mounting hole 113 can be adapted to the shape of the charging interface 520. At the same time, the mounting surface of the mounting hole 113 facing the receiving space 101 and perpendicular to the insertion and removal direction abuts against the port of the charging interface 520 away from the receiving space 101, thereby limiting the position of the charging interface 520 and improving the structural stability of the charging box 1.
[0120] In some embodiments, the connection between the projection overlap area of the peripheral region 112 and the limiting region 111 of the charging interface 520 can be inclined, and the connection between the second extension 330 and the main body 310 can be inclined accordingly.
[0121] As an example, the inclined transition can be an arc transition. Of course, in other embodiments, the inclined transition can be an irregularly shaped inclined transition, or a sloped inclined transition, etc.
[0122] Specifically, along the depth direction B, since the limiting area 111 in the lower housing 110 is lower than the peripheral area 112, the lower housing 110 has a setting where the middle limiting area 111 is sunken and the surrounding peripheral area 112 is raised. This makes the thickness of the connection between the limiting area 111 and the peripheral area 112 thinner. The second extension 330 needs to extend in the area of the peripheral area 112 corresponding to the charging interface 520, which makes the housing 10 thinner at this point.
[0123] Therefore, by setting the connection between the projected overlapping area of the outer periphery 112 and the limiting area 111 of the charging interface 520 as an inclined transition, the thickness of the housing 10 at the connection between the limiting area 111 and the outer periphery 112 of the charging interface 520 can be ensured that it is not too thin, thereby enhancing the structural stability of the lower housing 110. At the same time, by setting the connection between the second extension 330 and the main body 310 as a corresponding inclined transition, the second extension 330 can adapt to the inner wall of the lower housing 110 without reducing the thickness of the corresponding connection to install the second extension 330, thereby enhancing the strength of the lower housing 110 and increasing its structural stability.
[0124] In summary, this application also provides a limiting area 111 on the inner wall surface of the lower housing 110. The limiting area 111 limits the magnetic shielding sheet 30, and the battery 20 and charging coil 40 are fixed on the magnetic shielding sheet 30. This allows the lower housing 110 to limit the battery 20 and charging coil 40 by limiting the magnetic shielding sheet 30, thereby simplifying the installation of the battery 20 and charging coil 40, reducing the installation difficulty of the battery 20 and charging coil 40, and making the charging box 1 easier to assemble.
[0125] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A charging case, characterized in that, The charging case includes a shell, a battery, a magnetic shielding sheet, and a charging coil. The shell includes a lower shell and a tray. The lower shell and the tray cooperate to form an accommodating space. The tray has a recessed area for accommodating the earphones on the side opposite to the accommodating space. The battery, the magnetic shielding sheet, and the charging coil are sequentially stacked in the accommodating space along the depth direction of the lower housing. The charging coil is fixed to the side of the magnetic shielding sheet away from the tray, and the battery is fixed to the side of the magnetic shielding sheet facing the tray. A limiting area is provided on the inner wall surface of the lower housing to limit the magnetic shielding sheet.
2. The charging case according to claim 1, characterized in that, The inner wall surface of the lower housing includes a peripheral area surrounding the limiting area, and a portion of the limiting area is lower than the peripheral area to form a limiting groove. The magnetic shielding sheet includes a main body portion, which is disposed within the limiting groove.
3. The charging case according to claim 2, characterized in that, The bottom of the limiting groove is provided with a limiting post, and the main body is provided with a limiting hole that matches the limiting post.
4. The charging case according to claim 2, characterized in that, The limiting groove includes a first sub-region, a second sub-region surrounding the periphery of the first sub-region, and a third sub-region surrounding the outer ring of the second sub-region. The second sub-region is lower than the first sub-region and the third sub-region to form a receiving groove. The charging coil is disposed in the receiving groove, and the main body is supported and fixed on the first sub-region and the third sub-region.
5. The charging case according to any one of claims 1-4, characterized in that, The charging case includes a circuit board disposed within the accommodating space. The circuit board is fixed relative to the lower housing. The circuit board has a mounting notch with an opening at one end. The battery is at least partially located within the mounting notch. In at least one direction perpendicular to the depth direction, the movable gap between the battery and the circuit board is less than or equal to 0.5 mm.
6. The charging case according to claim 5, characterized in that, The battery has a first end and a second end arranged opposite to each other. The first end is away from the opening end of the mounting notch, and the second end is close to the opening end of the mounting notch. A limiting baffle for limiting the second end is further provided on the limiting area of the lower housing.
7. The charging case according to claim 6, characterized in that, The magnetic shielding sheet includes a first extension portion that extends to the limiting baffle, and the limiting baffle limits the first extension portion.
8. The charging case according to claim 6, characterized in that, The battery is cuboid in shape, and there are two sets of limiting baffles. The two sets of limiting baffles are respectively set to correspond to the two right-angled portions of the second end. Each set of limiting baffles includes a first stop portion and a second stop portion that are perpendicular to each other and used to stop the right-angled portions.
9. The charging case according to claim 1, characterized in that, Along the depth direction, the ratio of the overlapping area of the battery and the magnetic shielding sheet to the area of the battery is 1.
10. The charging case according to claim 1, characterized in that, The charging box further includes a first support pad disposed between the battery and the magnetic shielding sheet, and a second support pad disposed between the charging coil and the magnetic shielding sheet. The two sides of the first support pad are respectively adhered and fixed to the battery and the magnetic shielding sheet, and the two sides of the second support pad are respectively adhered and fixed to the charging coil and the magnetic shielding sheet. The thickness of the first support pad is greater than the thickness of the second support pad.
11. The charging case according to claim 10, characterized in that, The magnetic shielding sheet includes a first extension portion. A support platform for supporting the second end of the battery is provided on the limiting area of the lower housing. The first extension portion extends between the support platform and the battery, and the first extension portion and the support platform cooperate with each other so that the side of the first extension portion facing the battery is flush with the side of the first support pad facing the battery.