Waterproof wireless charging shell
By combining a PTFE microporous waterproof membrane with an elastic TPU bracket, the problems of insufficient heat dissipation and assembly complexity of traditional wireless charging shells are solved, achieving efficient heat dissipation and stable waterproofing, extending component life and simplifying the production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FUCHUANG PLASTIC HARDWARE CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional waterproof wireless charging housings suffer from insufficient heat dissipation due to their fully enclosed structure. Prolonged high temperatures shorten component lifespan, multi-layered structures increase assembly complexity and are prone to failure, and thicker waterproof materials affect electromagnetic wave conduction efficiency.
It adopts a PTFE microporous waterproof membrane combined with an elastic TPU bracket and thermally conductive silicone grease, and uses a magnetic self-compression sealing ring to replace screw fastening. The bracket design improves heat dissipation and waterproof performance and reduces assembly complexity.
It effectively improves heat dissipation efficiency by 40%, reduces the risk of water leakage, increases production efficiency by 30%, improves the stability of waterproof performance, and extends the life of components.
Smart Images
Figure CN224305532U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wireless charging technology, and in particular to a waterproof wireless charging housing. Background Technology
[0002] With the widespread application of wireless charging technology, the demand for waterproof wireless charging cases is increasing. However, traditional waterproof designs often adopt a fully enclosed structure, such as using sealant or rubber rings for waterproofing. While this effectively improves the waterproof performance of the case, it also greatly limits the heat dissipation capacity of the wireless charger. During wireless charging, because the coils and electronic components cannot dissipate heat effectively, the long-term high-temperature environment will significantly shorten the lifespan of these components and reduce the overall performance and reliability of the device.
[0003] Furthermore, to ensure its waterproof performance, traditional waterproof wireless charging cases typically require additional multi-layered structures, such as a back cover, sealing rings, and multi-layered waterproof designs secured with screws. While this multi-layered structure improves the overall waterproof performance of the case, it also significantly increases the complexity of assembly. In practice, any deviation or incomplete assembly during the process can lead to a decrease in waterproof performance, or even complete failure.
[0004] More importantly, in order to improve the waterproof performance of products, some designers use thicker waterproof materials or structures. While this design can ensure the waterproof effect to a certain extent, it may also hinder the effective conduction of electromagnetic waves, thus directly leading to a reduction in wireless charging efficiency. Therefore, we propose a waterproof wireless charging shell. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies. Traditional waterproof designs often employ a fully enclosed structure, such as using sealant or rubber rings for waterproofing. While this effectively improves the waterproof performance of the casing, it also significantly limits the heat dissipation capacity of the wireless charger. During wireless charging, the coils and electronic components cannot effectively dissipate heat, and prolonged exposure to high temperatures significantly shortens the lifespan of these components, reducing the overall performance and reliability of the device. Furthermore, to ensure waterproof performance, traditional waterproof wireless charging casings typically require additional multi-layered structures, such as a back cover, sealing rings, and multi-layered waterproof designs secured with screws. While this multi-layered structure improves the overall waterproof effect, it also greatly increases the complexity of assembly. In practice, any deviation or improper assembly during the assembly process can lead to a decrease in waterproof performance, or even complete failure. More importantly, to enhance waterproof performance, some designers use thicker waterproof materials or structures. While this design can guarantee waterproof performance to a certain extent, it may also hinder the effective conduction of electromagnetic waves, directly resulting in a reduction in wireless charging efficiency.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A waterproof wireless charging case includes a wireless charging body, which is composed of an upper shell and a lower shell. A soft silicone ring is provided around the top of the lower shell, and a first groove is provided at the bottom of the upper shell. The soft silicone ring fits into the first groove. A bracket is provided at the bottom of the wireless charging coil inside the wireless charging body, and a waterproof membrane is embedded in the lower shell.
[0008] Furthermore, a hard silicone rubber is disposed in the first groove, and an array of annular neodymium magnets is disposed in the upper housing. The first groove is magnetically connected to a soft silicone rubber ring.
[0009] Furthermore, the wireless charging coil inside the wireless charging body is fixed on the bracket, which is made of thermoplastic polyurethane material and consists of an annular base and elastic arms. The elastic arms extend from the four corners of the annular base to be fixed to the lower housing.
[0010] Furthermore, the elastic arm is 3mm-5mm wide, the end of the elastic arm is curved upwards, the elastic arm has a honeycomb-shaped perforation, and a copper foil strip is attached to the back of the elastic arm.
[0011] Furthermore, there is a 1.5mm gap between the bracket and the bottom of the lower housing, and thermally conductive silicone grease is filled between the bracket and the lower housing.
[0012] Furthermore, a slot is provided inside the lower housing near the wireless charging coil area, and the waterproof membrane is embedded in the slot.
[0013] Furthermore, the waterproof membrane is a PTFE microporous membrane, and an elastic silicone support frame is fixedly disposed around the periphery of the waterproof membrane.
[0014] Furthermore, the surface of the waterproof membrane is laser-etched to form a textured surface.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. Traditional fully enclosed waterproof designs hinder heat dissipation, while this utility model uses a PTFE microporous waterproof membrane, which allows air circulation while ensuring waterproofing, effectively reducing the operating temperature of the wireless charging coil and electronic components. In addition, the combination structure of elastic TPU bracket + thermal grease + copper foil strip quickly conducts the coil heat to the shell, avoiding local high temperature. Compared with the traditional sealed structure, the heat dissipation efficiency is improved by more than 40%, significantly extending the component life.
[0017] 2. The magnetic self-compression sealing ring replaces the traditional screw fastening. When the upper and lower shells are adsorbed, the sealing ring is automatically and evenly compressed, reducing manual assembly errors and the risk of water leakage. The waterproof membrane and the elastic silicone support frame are pre-assembled as independent modules and directly embedded into the slot, avoiding the assembly complexity caused by the superposition of multiple layers, and improving production efficiency by 30%. Attached Figure Description
[0018] Figure 1 A schematic diagram of the overall structure of a waterproof wireless charging housing provided by this utility model;
[0019] Figure 2 A schematic diagram of the upper and lower shell structures of a waterproof wireless charging shell provided by this utility model;
[0020] Figure 3 A schematic diagram of the support structure for a waterproof wireless charging housing provided by this utility model;
[0021] Figure 4 A schematic diagram of the waterproof membrane structure of a waterproof wireless charging shell provided by this utility model.
[0022] Legend: 1. Wireless charging body; 101. Upper shell; 102. Lower shell; 103. Soft silicone ring; 104. First groove; 105. Bracket; 106. Waterproof membrane; 107. Annular base; 108. Elastic arm; 109. Card slot; 110. Elastic silicone support frame. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0024] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.
[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example 1
[0027] like Figure 1-4 As shown, this utility model provides a technical solution: a waterproof wireless charging housing, including a wireless charging body 1, which is composed of an upper housing 101 and a lower housing 102. A soft silicone ring 103 is provided around the top of the lower housing 102, and a first groove 104 is provided at the bottom of the upper housing 101. The soft silicone ring 103 fits into the first groove 104. A bracket 105 is provided at the bottom of the wireless charging coil inside the wireless charging body 1. A waterproof membrane 106 is embedded in the lower housing 102. The waterproof membrane 106 expands its micropores to enhance heat dissipation at high temperatures and returns to its original state to maintain waterproofness at low temperatures, adapting to temperature fluctuation scenarios such as in-vehicle and outdoor environments. The elastic arm 108 and honeycomb hollow structure of the bracket 105 absorb vibration and impact, improving drop resistance by 50%, making it suitable for high-frequency use environments of mobile devices. Example 2
[0028] like Figure 1-4As shown, a hard silicone is provided in the first groove 104, and an annular neodymium magnet array is provided in the upper shell 101. The first groove 104 is magnetically connected to the soft silicone ring 103. The sealing ring has an "Ω" shaped cross section. When compressed, the internal cavity collapses and actively fills the assembly gap.
[0029] The wireless charging coil inside the wireless charging body 1 is fixed on the bracket 105. The bracket 105 is made of thermoplastic polyurethane material and consists of an annular base 107 and an elastic arm 108. The elastic arm 108 extends from the four corners of the annular base 107 to the lower housing 102. The elastic arm 108 is 3mm-5mm wide and the end of the elastic arm 108 is curved upward. The elastic arm 108 has a honeycomb-shaped hollow and a copper foil strip is attached to the back of the elastic arm 108. There is a 1.5mm gap between the bracket 105 and the bottom of the lower housing 102. Under normal conditions, the elastic arm 108 is slightly pre-compressed to provide stable support for the coil. When impacted, the X-shaped arm is stretched and deformed in all directions, and the honeycomb nodes absorb energy. The maximum deformation can reach 2mm. Thermal conductive silicone grease is filled between the bracket 105 and the lower housing 102.
[0030] A slot 109 is provided inside the lower housing 102 near the wireless charging coil area. A waterproof membrane 106 is embedded in the slot 109. The waterproof membrane 106 is a PTFE microporous membrane. An elastic silicone support frame 110 is fixedly provided around the waterproof membrane 106. The surface of the waterproof membrane 106 is laser-etched to form a textured surface. The textured surface is a lotus leaf-like micro-nano structure, which enhances hydrophobicity and makes the water droplet contact angle >150°, achieving a self-cleaning effect. When the internal temperature of the housing rises, the silicone expands due to heat, causing the PTFE membrane to stretch slightly, the micropores to expand, and the heat dissipation efficiency to be improved. After the temperature drops, it returns to its original shape and maintains waterproofness.
[0031] The working process of this utility model is as follows: When using a waterproof wireless charging shell, the upper shell 101 and the lower shell 102 are automatically adsorbed and aligned by an array of annular neodymium magnets; the soft silicone ring 103 at the top of the lower shell 102 is embedded in the first groove 104 of the upper shell 101 and is uniformly compressed under the action of magnetic attraction to form an "Ω" shaped sealing structure, which actively fills the assembly gap and ensures IP68 waterproof rating.
[0032] When the wireless charging coil is powered on, it generates an electromagnetic field and heats up due to energy loss. When the internal temperature rises, the elastic silicone support frame 110 expands due to heat, causing the PTFE film to stretch slightly. The micropores expand to 12-15μm, enhancing air circulation and accelerating heat dissipation. When the temperature drops, the silicone cools and shrinks, the micropores return to their original shape, and the waterproof performance is re-locked.
[0033] The coil is fixed on the annular base 107 of the TPU bracket 105. The elastic arm 108 is in a pre-compressed arc-shaped upward state, providing stable suspension support. When there is external vibration or drop, the honeycomb hollow structure of the elastic arm 108 deforms to absorb the impact energy and can buffer a maximum displacement of 2mm to prevent the coil from shifting or being damaged. After the impact, the elastic arm 108 automatically resets due to the elasticity of the material. The heat of the coil is conducted to the elastic arm 108 through the copper foil strip, and then transferred to the metal part of the lower shell 102 for dissipation through the thermal grease. The 1.5mm air gap between the bracket 105 and the shell forms an auxiliary heat dissipation channel to avoid heat accumulation.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waterproof wireless charging housing, comprising a wireless charging body (1), characterized in that: The wireless charging body (1) is composed of an upper shell (101) and a lower shell (102). A soft silicone ring (103) is provided around the top of the lower shell (102). A first groove (104) is provided at the bottom of the upper shell (101). The soft silicone ring (103) fits into the first groove (104). A bracket (105) is provided at the bottom of the wireless charging coil inside the wireless charging body (1). A waterproof membrane (106) is embedded inside the lower shell (102).
2. The waterproof wireless charging housing according to claim 1, characterized in that: The first groove (104) is provided with hard silicone, and the upper shell (101) is provided with an array of annular neodymium magnets. The first groove (104) is magnetically connected to the soft silicone ring (103).
3. The waterproof wireless charging housing according to claim 1, characterized in that: The wireless charging coil inside the wireless charging body (1) is fixed on the bracket (105). The bracket (105) is made of thermoplastic polyurethane material. The bracket (105) consists of an annular base (107) and an elastic arm (108). The elastic arm (108) extends from the four corners of the annular base (107) to the lower shell (102).
4. A waterproof wireless charging housing according to claim 3, characterized in that: The elastic arm (108) is 3mm-5mm wide, and the end of the elastic arm (108) is curved upward. The elastic arm (108) is provided with a honeycomb-shaped hollow, and a copper foil strip is attached to the back of the elastic arm (108).
5. A waterproof wireless charging housing according to claim 1, characterized in that: There is a 1.5mm gap between the bracket (105) and the bottom of the lower housing (102), and thermally conductive silicone grease is filled between the bracket (105) and the lower housing (102).
6. A waterproof wireless charging housing according to claim 1, characterized in that: A slot (109) is provided inside the lower housing (102) near the wireless charging coil area, and the waterproof membrane (106) is embedded in the slot (109).
7. A waterproof wireless charging housing according to claim 1, characterized in that: The waterproof membrane (106) is a PTFE microporous membrane, and an elastic silicone support frame (110) is fixedly provided on the periphery of the waterproof membrane (106).
8. A waterproof wireless charging housing according to claim 1, characterized in that: The surface of the waterproof membrane (106) is laser-etched to form a textured surface.