Lightweight Mobile Phone Case
46 patents in this list
Updated:
Mobile phone case design faces increasingly demanding requirements as devices become thinner and more powerful. Current flagship phones weigh between 170-240g, with cases typically adding 25-45g while needing to protect against drops from 1.5m onto concrete and withstand daily wear. These protection requirements must be balanced against user preferences for minimal bulk.
The fundamental challenge lies in maximizing impact resistance and structural rigidity while minimizing the addition of weight and thickness to the device.
This page brings together solutions from recent research—including multi-layered co-molded constructions, reinforced housings with optimized joining areas, integrated shock absorption systems, and antimicrobial surface treatments. These and other approaches focus on achieving protection standards while maintaining the sleek profile of modern mobile devices.
1. Mobile Phone Case with TPU Frame and Recessed Airbag Cavities Containing Protruding Shock-Absorbing Patterns
DONGGUAN WEISONG IND CO LTD, DONGGUAN WEISONG INDUSTRIAL CO LTD, 2023
Mobile phone case with improved shock absorption to prevent damage when dropped. The case has a TPU frame with recessed airbag cavities at the corners. These cavities contain protruding shock-absorbing patterns inside. The TPU frame connects to a PC back shell enclosing the phone. This provides a combined case with integrated shock absorption. The recessed airbags and protruding shock-absorbing patterns inside cushion the phone corners when dropped, preventing direct impacts.
2. Two-Piece Mobile Phone Case with Integrated Corner Protection and Heat Sink Mechanism
ANHUI CHANGWANG INTELLIGENT TECH CO LTD, ANHUI CHANGWANG INTELLIGENT TECHNOLOGY CO LTD, 2023
A four-corner anti-collision mobile phone protective case with corner protection and shock absorption. The case has a two-piece design with a first and second protective shell that fit around the corners of the phone. Each corner of the shells has a protective structure inside. Heat sinks are installed on the inner surfaces of the shells. Mounting grooves are provided on the back sides and elastic connecting strips are installed inside them. This provides corner protection and shock absorption to prevent damage when the phone is dropped. The case has a slim profile with a total thickness of less than 5mm to avoid bulkiness.
3. Mobile Phone Case with Embedded Tempered Glass, Elastic Buffer, and Movable Heat Dissipation Component
SHENZHEN PURI HIGH TECH IND CO LTD, SHENZHEN PURI HIGH-TECH INDUSTRIAL CO LTD, 2023
A reinforced mobile phone case that provides improved drop protection, heat dissipation, and button access compared to conventional cases. The case has a plastic shell with embedded tempered glass, an elastic buffer inside, and an airbag plate on the sides. A movable heat dissipation component inside the shell connects to a second heat dissipation hole. This setup reduces shock and vibration to the phone, allows better heat dissipation, and prevents button mispresses due to the airbag and buffer.
4. Magnetic Ultra-Thin Folding Support with Extendable Column and Top Plate
Shenzhen Bashidehen Technology Co., Ltd, Chongqing Shiweixun Cultural Communication Co., Ltd, 2023
An ultra-thin support that allows mobile phones to stand upright for easy viewing. The support has a thin base that attaches magnetically to the phone, a column that extends up from the base, and a top plate that holds the phone in place. The column and plate fold down against the base when not in use.
5. Mobile Phone Case with Multi-Layer Structure Including Anti-Skid Pad, Heat Dissipation Window, Metal Reinforcement, and Velvet-Lined Side Shell
HEYUAN JIACHENG ELECTRONIC TECH CO LTD, HEYUAN JIACHENG ELECTRONIC TECHNOLOGY CO LTD, 2023
Four-round anti-drop mobile phone case that provides improved drop protection compared to existing cases. The case has a back shell with an anti-skid pad at the bottom, a heat dissipation window at the top, and a metal sheet inside the front end. The back shell connects to a side shell with a limit bar, extension block, and non-slip surface. The case also has a fine velvet lining inside the side shell. This design provides a multi-layer structure with anti-skid, heat dissipation, metal reinforcement, limit rings, and non-slip features to improve drop protection around the phone.
6. Frameless Mobile Phone Case with Grooved Edges for Removable Drop Protection Inserts and Integrated Lens Cover
DONGGUAN YICHUANG SCIENCE AND TECH CO LTD, DONGGUAN YICHUANG SCIENCE AND TECHNOLOGY CO LTD, 2022
Anti-drop frameless mobile phone case with integrated drop protection. The case has a shell with a back plate and edges. The edges have grooves for drop protection pieces. These grooves are filled by removable drop protection pieces that attach inside the case edges. This provides drop protection without adding bulk or weight to the case. The drop protection pieces can be easily inserted and removed from the case edges for installation and removal. The case also has a lens cover attached to the shell.
7. Mobile Device Case with Integrated Multi-Layered Construction Comprising Inner Conforming Layer, Middle Shock Absorption Layer, and Outer Impact Resistance Layer
Vinci Brands LLC, 2022
Protective case for mobile devices with an integrated multi-layered construction to provide enhanced protection while minimizing bulkiness and weight. The case has a front face, back face, perimeter, and corners. The multi-layered construction involves molding three distinct layers together in an integrated construct. The layers are the inner layer, middle layer, and outer layer. The inner layer directly contacts and conforms to the mobile device. The outer layer provides impact resistance. The middle layer provides shock absorption.
8. Mobile Phone Case with Segmented Buffer Sections and Narrow Central Grip Zone
SHENZHEN KANGCHENGTAI IND CO LTD, SHENZHEN KANGCHENGTAI INDUSTRIAL CO LTD, 2021
A mobile phone case design that improves user experience by providing better grip and protection without adding bulk. The case has separate buffer sections for the top and bottom parts of the phone, connected by a narrow middle section for gripping. This allows better handholding compared to a single wide buffer around the whole case. The narrow middle section prevents the case from being too thick and heavy while still protecting the phone's vulnerable areas like camera, charging port, and mic. The case also has features like sound transmission holes, thermochromic layers, and limiting plates to enhance functionality and durability.
9. Mobile Phone Case with Rigid Top and Bottom Frames and Flexible Side Shell Featuring Integrated Clamping Camera Cutout
ZHANG YUQIONG, 2021
A drop-proof mobile phone case with improved protection and durability compared to existing cases. The case has an upper pressure frame, a flexible protective shell, and a bottom shell. The flexible shell covers the phone sides, while the hard frames attach to the top and bottom. This allows the shell to avoid damaging the phone body while still providing external protection. The frames are rigid materials, and the shell is flexible. This prevents frame damage when dropped while cushioning the phone. The camera cutout has clamping features to tightly connect the flexible shell to the frame.
10. Mobile Phone Case with Enhanced Thickness and Textured Surface for Drop Resistance
GUANGZHOU KEWEI TECH CO LTD, GUANGZHOU KEWEI TECHNOLOGY CO LTD, 2021
An anti-drop mobile phone case with improved drop protection and tactile feel. The case has a main body with a camera hole and is made of thicker, more durable materials compared to typical silicone cases. This provides better drop protection and impact resistance for the phone. The case also aims to enhance the user experience with a better tactile feel, likely achieved through the use of materials with a more pronounced texture or grip.
11. Mobile Phone Case with Honeycomb Interlayer Containing Shear Thickening Glue
JIANGNAN UNIVERSITY, UNIV JIANGNAN, 2021
Anti-drop mobile phone case with improved drop protection and signal transmission compared to traditional cases. The case has a honeycomb interlayer filled with shear thickening glue sandwiched between the front and back panels. The glue absorbs impact energy to reduce damage to the phone when dropped. The case also has raised camera, screen, and button edges to prevent direct contact with surfaces. A suede back panel provides grip. The honeycomb structure provides lightweight drop protection without shielding signals like metal cases.
12. Mobile Device Protective Case with Co-Molded Multi-Layered Construction
Incipio, LLC, 2021
Protective cases for mobile devices with improved impact resistance and reduced bulkiness compared to conventional cases. The case has an integrated multi-layered construction with a rigid inner layer, a flexible middle layer, and a shock-absorbent outer layer. The layers are co-molded together within a mold to form an integrated protective case. This construction provides enhanced protection against impact and drops while minimizing bulk and weight compared to conventional cases.
13. Mobile Phone Case with Integrated Shock Absorption, Heat Dissipation, and Anti-Slip Features
SHENZHEN LIANXINYING TECH CO LTD, SHENZHEN LIANXINYING TECHNOLOGY CO LTD, 2021
A high wear-resistant mobile phone case with built-in anti-fall and shock absorption features to protect the phone from drops and impacts while also allowing heat dissipation and preventing slips. The case has an outer shell with fixed inner layers, fins, heat dissipation blocks, airbags, anti-fall blocks, a permeable layer, and anti-skid grooves. The inner layers provide shock absorption, fins improve heat dissipation, airbags cushion falls, blocks protect corners, permeable layers allow heat escape, and grooves prevent slipping.
14. Mobile Phone Case with Shock-Absorbing Spring, Ventilated Outer Casing, and Anti-Slip Layer
DAI XIANGRU, 2021
Mobile phone case with improved drop protection, heat dissipation, and anti-loss features. The case has an inner casing with a fixing plate and a shock-absorbing spring between the inner and outer walls of the outer casing. The outer casing has an anti-slip layer with patterns on the surface. This provides better drop protection as the spring compresses on impact. The anti-slip layer prevents slipping. Heat dissipation is improved by having vent holes in the outer casing. A lanyard is attached to the top to prevent losing the phone.
15. Two-Piece Mobile Phone Case with Soft Inner Shell and Hard Outer Shell Featuring Protrusions and Annular Groove Attachment System
GUANGZHOU EASTMATE PLASTIC PRODUCTS CO LTD, 2021
A two-piece mobile phone case with a soft inner shell and a hard outer shell that provides high strength and durability. The inner shell made of soft plastic protects the phone and prevents scratches, while the outer shell made of hard plastic provides impact resistance and drop protection. The inner shell has protrusions to position the phone, and the outer shell has a strip that passes through an annular groove on the inner shell. The strip attaches to the outer shell with clips. This allows detachable assembly of the two shells. The hard outer shell improves drop protection compared to a soft shell, while the soft inner shell protects the phone from scratches.
16. Mobile Phone Case with Dual-Layer Shell and Integrated Finger Ring Buckle
GUANGZHOU EASTMATE PLASTIC PRODUCTS CO LTD, 2021
Mobile phone case with improved drop protection and functionality. The case has an inner soft shell that fits the phone and an outer hard shell. The inner shell is made of soft plastic to protect the phone without scratching. The outer shell is made of hard plastic to absorb impacts and drops. The inner shell has protrusions and slots that match up with the outer shell to connect them. The case also has a finger ring buckle on the back. The two-piece design allows flexible protection and prevents inner shell damage while the outer shell provides drop protection. The inner shell material prevents scratches on the phone.
17. Mobile Phone Case with Multi-Layer Reinforcing and Wear-Resistant Structure
WANG LING, 2021
Mobile phone case with improved strength and wear resistance to prevent breakage and damage. The case has a reinforcing layer, a polyphenylene ester layer, a PVC plastic layer, and a polyoxymethylene plastic layer stacked inside the case body. This improves the strength and durability of the case. A wear-resistant layer, polyamide fiber layer, nylon fiber layer, and glass fiber layer are added on the back of the reinforcing layer. This further enhances wear resistance to prevent friction damage.
18. Smartphone Case with Thicker Corner Design and Buffered Transition Zone for Enhanced Impact Absorption
QIN MINGJIE, 2021
Smartphone case design that provides better drop protection and grip compared to conventional cases. The case has a unique shape with thicker corners and a transition zone between the back shell and side edges. The thicker corners provide better drop protection for the vulnerable corner areas. The transition zone between the back shell and side edges has a buffered portion closer to the phone side to absorb impact and prevent damage if the phone is dropped edge-first. This reduces the risk of cracking or breaking the corners compared to traditional cases with uniform thickness.
19. Mobile Phone Case with Multi-Layer Corner Structure and Rotating Grip Ring
HU HAIMIN, 2021
Anti-drop mobile phone case with improved drop protection and usability. The case has a multi-layer corner structure with an outer frame, inner buffer, and protruding angles. This disperses impact force better than single material cases. The frame is fixed to the inner buffer. The case also has a rotating ring on the back for better grip. The buttons, ports, and camera are accommodated in the frame to avoid damaging the phone. The case is made by two-shot injection molding for strong connection.
20. Mobile Phone Case with Integrated Corner Covers, Shock-Absorbing Plate, Internal Buffer Spring, and Heat Dissipation Port
ZHUOMEI LEATHER TECH DONGGUAN CO LTD, ZHUOMEI LEATHER TECHNOLOGY CO LTD, 2021
Shock-absorbing and anti-drop mobile phone case with improved protection against drops and falls. The case has features like corner protective covers, a shock-absorbing plate with a buffer spring inside, and a heat dissipation port. These elements along with the main case material of polycarbonate provide better shock absorption, drop protection, and heat dissipation compared to traditional phone cases. The corner covers prevent wear on the phone edges when dropped, the shock plate and spring cushion impacts, and the port allows heat escape.
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The phone case patents shown here demonstrate several approaches to making them lighter. These developments show how lightweight phone covers that are both safe and user-friendly are still being sought after. They range from multi-layered construction processes to integrated storage solutions and antimicrobial coatings.