Replaceable anti-falling structure of four corners of a mobile phone shell

By designing a replaceable four-corner structure for the phone case, and using three layers of drop-proof corner pieces and a connecting mechanism, the problem of resource waste and poor drop protection caused by replacing the entire case is solved, achieving convenient replacement and efficient protection.

CN224367883UActive Publication Date: 2026-06-16DONGGUAN LINZE COMM EQUIP CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN LINZE COMM EQUIP CO LTD
Filing Date
2025-08-11
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing phone cases require complete replacement after all four corners are damaged, leading to resource waste and increased costs, and their drop protection is inadequate.

Method used

Design a phone case with replaceable four corners for drop protection. The three-layer drop protection corner pieces include an outer protective layer, a buffer layer, and an inner support layer. The design allows for detachable installation via a connecting mechanism. Silicone and PC+ABS alloy materials are combined to enhance protection and cushioning performance.

🎯Benefits of technology

It enables convenient replacement of the drop-proof corner pieces, reduces usage costs, improves the drop-proof effect of the phone, provides sufficient protection, and enhances the phone's drop resistance and lifespan.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224367883U_ABST
    Figure CN224367883U_ABST
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Abstract

The utility model relates to mobile phone accessory technical field discloses a four corners replaceable anti -drop structure of cell phone shell, including cell phone shell main part: cell phone shell main part is used for the side and back of cell phone, and four corners of cell phone shell main part all are provided with mounting groove. This four corners replaceable anti -drop structure of cell phone shell, through the connecting mechanism, makes the anti -drop corner spare to be able to firmly install in mounting groove, and is convenient for user to replace, when the corner of cell phone shell is damaged because of falling, user only needs to replace the damaged anti -drop corner spare, and does not need to replace entire cell phone shell, to save the resource and reduce the use cost, in addition the anti -drop corner spare has three -layer structure design, and the outer layer protection part can directly contact the outside, plays the primary protection function, the buffer layer is located between the outer layer protection part and the inner layer support part, can effectively disperse and absorb the impact force that the cell phone falls and produces, and the inner layer support part is connected with mounting groove, provides stable support.
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Description

Technical Field

[0001] This utility model relates to the field of mobile phone accessories technology, and in particular to a drop-proof structure for a mobile phone case with replaceable four corners. Background Technology

[0002] With the widespread use of smartphones, it is inevitable that phones will be dropped during daily use. The four corners of the phone are the most vulnerable to impact damage. Therefore, a phone case with replaceable corners is needed to improve the phone's drop resistance and protect it from damage caused by drops and other accidents.

[0003] Regarding existing related technologies, the inventors believe that they often have the following drawbacks: Existing phone cases are usually of a one-piece structure. When a part of the phone case is damaged due to a drop, the entire phone case needs to be replaced, which not only wastes resources but also increases the user's cost. In addition, traditional phone cases have limited drop protection and cannot effectively disperse and absorb the impact force generated when the phone is dropped, thus failing to provide sufficient protection for the phone. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of requiring the entire phone case to be replaced after the four corners are damaged, which leads to waste of resources and increased costs, and the drop protection effect is not good. To this end, we propose a drop protection structure for phone cases with replaceable four corners.

[0005] To achieve the above objectives, this application adopts the following technical solution: a drop-proof structure with replaceable four corners for a mobile phone case, comprising a mobile phone case body: the mobile phone case body is used to wrap the sides and back of the mobile phone, and each of the four corners of the mobile phone case body is provided with a mounting groove, and a drop-proof corner piece is provided inside the mounting groove. The drop-proof corner piece includes an outer protective part, a buffer layer and an inner support part, the outer protective part is used to directly contact the outside world, the buffer layer is located between the outer protective part and the inner support part, the inner support part is used to connect with the mounting groove, and the top of the mounting groove is provided with a connecting mechanism for detachably fixing the drop-proof corner piece in the mounting groove.

[0006] Preferably, the connecting mechanism includes a fixing rod disposed inside the mounting groove, a circular plate fixed to the top of the fixing rod, a disc fixed to the surface of the fixing rod, a reset member sleeved on the surface of the fixing rod, one end of the reset member being fixed to the disc, and the other end of the reset member being fixed to the interior of the phone case body, and a fixing groove matching the fixing rod being formed on the surface of the inner support part.

[0007] Preferably, each of the four corners of the main body of the mobile phone case is provided with a positioning groove that matches the fixing rod, and the positioning groove is connected to the mounting groove.

[0008] Preferably, the buffer layer is provided with silicone.

[0009] Preferably, the outer protective layer is made of TPE elastomer, and the surface of the outer protective layer is provided with anti-slip texture.

[0010] Preferably, the main body of the phone case is made of PC+ABS alloy, and the inner wall of the main body of the phone case is provided with shock-absorbing protrusions.

[0011] Preferably, the edges of the anti-fall corner piece are set with a 15° rounded chamfer.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] In this invention, the connecting mechanism allows the anti-drop corner piece to be securely installed in the mounting slot, while also facilitating user replacement. When a corner of the phone case is damaged due to a drop, the user only needs to replace the damaged corner piece, without replacing the entire phone case, thus saving resources and reducing usage costs. Furthermore, the anti-drop corner piece has a three-layer structure design. The outer protective layer can directly contact the outside world, providing initial protection. The buffer layer is located between the outer protective layer and the inner support layer, effectively dispersing and absorbing the impact force generated when the phone is dropped. The inner support layer is connected to the mounting slot, providing stable support. This three-layer structure design greatly improves the anti-drop effect of the phone case, providing ample protection for the phone. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the mounting groove structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the anti-fall corner piece of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection mechanism of this utility model.

[0019] Illustration: 1. Phone case body; 2. Mounting slot; 3. Outer protective layer; 4. Buffer layer; 5. Inner support layer; 6. Fixing rod; 7. Round plate; 8. Round disc; 9. Reset component; 10. Fixing slot; 11. Positioning slot; 12. Silicone; 13. Shock-absorbing protrusion. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0021] Reference Figures 1-4 As shown, this utility model provides a technical solution: a drop-proof structure with replaceable four corners for a mobile phone case, including a mobile phone case body 1. The mobile phone case body 1 is used to cover the sides and back of the mobile phone. Each of the four corners of the mobile phone case body 1 is provided with a mounting groove 2. Drop-proof corner pieces are installed inside the mounting grooves 2. Each drop-proof corner piece includes an outer protective layer 3, a buffer layer 4, and an inner support layer 5. The outer protective layer 3 is used to directly contact the outside environment. The buffer layer 4 is located between the outer protective layer 3 and the inner support layer 5. The inner support layer 5 is used to connect with the mounting groove 2. A connecting mechanism is provided at the top of the mounting groove 2 for detachably fixing the drop-proof corner pieces inside the mounting groove 2. Through the connecting mechanism, the drop-proof corner pieces are... The protective corner piece can be securely installed in the mounting slot 2 and is easy for users to replace. When a corner of the phone case is damaged due to a drop, the user only needs to replace the damaged corner piece instead of replacing the entire phone case, thus saving resources and reducing usage costs. In addition, the corner piece has a three-layer structure design. The outer protective layer 3 can directly contact the outside world and play a preliminary protective role. The buffer layer 4 is located between the outer protective layer 3 and the inner support layer 5, which can effectively disperse and absorb the impact force generated when the phone is dropped. The inner support layer 5 is connected to the mounting slot 2 to provide stable support. This three-layer structure design greatly improves the drop protection effect of the phone case and provides sufficient protection for the phone.

[0022] Reference Figure 1 As shown in this embodiment, the connecting mechanism includes a fixing rod 6 disposed inside the mounting groove 2, a circular plate 7 fixed to the top of the fixing rod 6, a circular disc 8 fixed to the surface of the fixing rod 6, and a reset member 9 sleeved on the surface of the fixing rod 6. One end of the reset member 9 is fixed to the circular disc 8, and the other end of the reset member 9 is fixed to the inside of the phone case body 1. The surface of the inner support part 5 is provided with a fixing groove 10 that matches the fixing rod 6. Through the cooperation between the fixing groove 10 and the fixing rod 6, and the elastic effect of the reset member 9, the anti-drop corner piece can be firmly fixed in the mounting groove 2. At the same time, when the anti-drop corner piece needs to be replaced, the user can press the circular plate 7 to deform the reset member 9, thereby causing the fixing rod 6 to disengage from the fixing groove 10 on the surface of the inner support part 5, and thus remove the anti-drop corner piece from the mounting groove 2. The operation is simple and quick.

[0023] Reference Figure 1As shown in this embodiment: the four corners of the main body 1 of the mobile phone case are provided with positioning grooves 11 that match the fixing rods 6. The positioning grooves 11 are connected to the mounting grooves 2. Through the cooperation of the positioning grooves 11 and the fixing rods 6, the anti-drop corner pieces can be quickly positioned during installation, which improves the accuracy and efficiency of installation. At the same time, the connection design between the positioning grooves 11 and the mounting grooves 2 also makes it easier for users to accurately press the fixing rods 6 through the positioning grooves 11 when replacing the anti-drop corner pieces, making the replacement process smoother.

[0024] Reference Figure 1 As shown in this embodiment: the buffer layer 4 is provided with silicone 12. The buffer performance of the buffer layer 4 is further enhanced by the silicone 12. The silicone 12 has good elasticity and resilience, which can effectively absorb and disperse the impact force when the mobile phone is dropped, and protect the mobile phone from damage.

[0025] Reference Figure 1 As shown in this embodiment: the outer protective part 3 is made of TPE elastomer, and the surface of the outer protective part 3 is provided with anti-slip texture. Through the setting of TPE elastomer, the outer protective part 3 has good elasticity and wear resistance, which can play a preliminary cushioning role when the mobile phone is dropped. At the same time, the setting of anti-slip texture increases the friction between the mobile phone case and the user's hand, prevents the mobile phone from slipping, and improves the safety of use.

[0026] Reference Figure 1 As shown in this embodiment: the main body 1 of the phone case is made of PC+ABS alloy. The inner wall of the main body 1 of the phone case is provided with shock-absorbing protrusions 13. Through the setting of PC+ABS alloy, the main body 1 of the phone case not only has high strength and hardness, which can effectively resist external impact, but also has good toughness and wear resistance, extending the service life of the phone case. At the same time, the setting of shock-absorbing protrusions 13 further enhances the shock absorption performance of the phone case. When the phone is dropped, it can absorb and disperse part of the impact force, reducing damage to the phone. In addition, the shock-absorbing protrusions 13 can also increase the friction between the main body 1 of the phone case and the phone, preventing the phone from sliding inside the phone case and improving the stability of use.

[0027] Reference Figure 1 As shown in this implementation scheme: the edge of the anti-drop corner piece is set with a 15° rounded chamfer. The 15° rounded chamfer design not only makes the edge of the anti-drop corner piece smoother, reducing the risk of damage to the user or object in case of accidental collision, but also improves the overall aesthetics of the phone case.

[0028] Working principle: The user uses the connecting mechanism to securely install the anti-drop corner piece in the mounting slot 2, making it easy for the user to replace. When a corner of the phone case is damaged due to a drop, the user only needs to replace the damaged corner piece, instead of replacing the entire phone case, thus saving resources and reducing usage costs. Furthermore, the anti-drop corner piece has a three-layer structure design. The outer protective layer 3 directly contacts the outside environment, providing initial protection. The buffer layer 4 is located between the outer protective layer 3 and the inner support layer 5, effectively dispersing and absorbing the impact force generated when the phone is dropped. The inner support layer 5 connects to the mounting slot 2, providing stable support. This three-layer structure design greatly improves the phone case's performance. The drop-proof effect provides ample protection for the mobile phone. Through the cooperation of the fixing groove 10 and the fixing rod 6, and the elasticity of the reset piece 9, the drop-proof corner piece can be securely fixed in the mounting groove 2. When the drop-proof corner piece needs to be replaced, the user can press the round plate 7 to deform the reset piece 9, causing the fixing rod 6 to disengage from the fixing groove 10 on the surface of the inner support part 5, thereby removing the drop-proof corner piece from the mounting groove 2. The operation is simple and quick. The cooperation of the positioning groove 11 and the fixing rod 6 allows for quick positioning of the drop-proof corner piece during installation, improving installation accuracy and efficiency. Furthermore, the interconnected design of the positioning groove 11 and the mounting groove 2 facilitates easy replacement of the drop-proof corner piece. During replacement, the fixing rod 6 is accurately pressed through the positioning groove 11, making the replacement process smoother. The silicone 12 further enhances the cushioning performance of the buffer layer 4. The silicone 12 has good elasticity and resilience, which can effectively absorb and disperse the impact force when the phone is dropped, protecting the phone from damage. The TPE elastomer gives the outer protective layer 3 good elasticity and wear resistance, which can play a preliminary cushioning role when the phone is dropped. At the same time, the anti-slip texture increases the friction between the phone case and the user's hand, preventing the phone from slipping and improving the safety of use. The PC+ABS alloy makes the main body of the phone case 1... Not only does it possess high strength and hardness, effectively resisting external impacts, but it also exhibits good toughness and wear resistance, extending the lifespan of the phone case. Furthermore, the shock-absorbing protrusions 13 further enhance the case's shock absorption performance, absorbing and dispersing some of the impact force when the phone is dropped, reducing damage. Additionally, the shock-absorbing protrusions 13 increase the friction between the case body 1 and the phone, preventing the phone from sliding inside the case and improving stability. The 15° rounded corner design not only makes the edges of the anti-drop corner pieces smoother, reducing the risk of damage to users or objects during accidental collisions, but also enhances the overall aesthetics of the phone case.

[0029] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A drop-proof structure for a mobile phone case with replaceable four corners, characterized in that, Includes a mobile phone case body (1): The mobile phone case body (1) is used to wrap the sides and back of the mobile phone. The four corners of the mobile phone case body (1) are provided with mounting grooves (2). The mounting grooves (2) are provided with anti-drop corner pieces. The anti-drop corner pieces include an outer protective part (3), a buffer layer (4) and an inner support part (5). The outer protective part (3) is used to directly contact the outside world. The buffer layer (4) is located between the outer protective part (3) and the inner support part (5). The inner support part (5) is used to connect with the mounting groove (2). The top of the mounting groove (2) is provided with a connecting mechanism for detachably fixing the anti-drop corner pieces in the mounting groove (2).

2. The drop-proof structure with replaceable four corners of the mobile phone case according to claim 1, characterized in that: The connecting mechanism includes a fixing rod (6) disposed inside the mounting groove (2), a circular plate (7) fixed to the top of the fixing rod (6), a disc (8) fixed to the surface of the fixing rod (6), a reset member (9) sleeved on the surface of the fixing rod (6), one end of the reset member (9) fixed to the disc (8), and the other end of the reset member (9) fixed to the inside of the phone case body (1). The surface of the inner support part (5) is provided with a fixing groove (10) that matches the fixing rod (6).

3. The replaceable four-corner drop-proof structure of the mobile phone case according to claim 1, characterized in that: The four corners of the main body (1) of the mobile phone case are provided with positioning grooves (11) that match the fixing rod (6), and the positioning grooves (11) are connected to the mounting grooves (2).

4. The replaceable four-corner drop-proof structure of the mobile phone case according to claim 1, characterized in that: The buffer layer (4) is provided with silicone (12) inside.

5. The replaceable four-corner drop-proof structure of the mobile phone case according to claim 1, characterized in that: The outer protective layer (3) is made of TPE elastomer, and the surface of the outer protective layer (3) is provided with anti-slip texture.

6. The drop-proof structure with replaceable four corners of the mobile phone case according to claim 1, characterized in that: The main body (1) of the mobile phone case is made of PC+ABS alloy, and the inner wall of the main body (1) of the mobile phone case is provided with shock-absorbing protrusions (13).

7. The drop-proof structure with replaceable four corners of the mobile phone case according to claim 1, characterized in that: The edges of the anti-fall corner brackets are set with a 15° rounded chamfer.