Impact protection device and mobile terminal

Abstract

The embodiment of the present application provides a kind of impact protection device and mobile terminal, the impact protection device is used to protect the corner of the middle frame of mobile terminal, impact protection device includes: body part, it is suitable to be located at the corner of middle frame and is connected with middle frame, body part is used to protrude from the side wall of middle frame on both sides of corner;Buffer structure is located in body part.The impact protection device can make the corner area no longer directly as rigid edge when mobile terminal falls, knocks or contacts with hard object, but the body part formed by outward expansion first contacts external load, and the impact is guided to buffer structure to be absorbed and dispersed;It is helpful to improve the impact resistance of the corner area of middle frame, it is helpful to alleviate stress concentration when mobile terminal falls, reduce the risk of local cracking and deformation, to help improve the drop protection capability of mobile terminal.And it is helpful to improve the structural reliability and appearance integrity of mobile terminal in daily use environment.

Description

Technical Field

[0001] This application relates to the field of mobile terminal technology, and in particular to an impact protection device and a mobile terminal. Background Technology

[0002] Because smartphones and other mobile devices are sometimes accidentally dropped during daily use, drop protection capability is an important indicator for mobile devices. A mobile device has a mid-frame, which forms the circumferential part of the device's casing, and the mid-frame has four corners.

[0003] In related technologies, the strength of the mobile terminal casing is improved by reinforcing only a portion of the material in the mid-frame, thereby enhancing the drop resistance of the mobile terminal device. However, when the mobile terminal is dropped, stress concentration easily occurs at the corners of the mid-frame, making the mobile terminal device susceptible to damage from the drop. Summary of the Invention

[0004] This application provides an impact protection device and a mobile terminal to improve the drop protection capability of the mobile terminal.

[0005] In a first aspect, embodiments of this application provide an impact protection device for protecting the corner of the mid-frame of a mobile terminal. The impact protection device includes: a body portion adapted to be disposed at the corner of the mid-frame and connected to the mid-frame, the body portion being used to protrude from the sidewalls of the mid-frame on both sides of the corner; and a buffer structure disposed on the body portion.

[0006] In some embodiments, the body portion has a first surface facing the corner and a second surface facing away from the corner, the first surface being for connection with the middle frame, and the second surface being for protruding from the sidewalls of the middle frame on both sides of the corner; the buffer structure is disposed between the first surface and the second surface.

[0007] In some embodiments, the buffer structure includes a buffer cavity.

[0008] In some embodiments, the buffer cavity extends through the body portion along the thickness direction of the mobile terminal.

[0009] In some embodiments, the wall thickness of the body portion on the side of the buffer cavity facing away from the first surface is 1mm-2mm.

[0010] In some embodiments, the body portion includes an elastic material.

[0011] In some embodiments, the impact protection device further includes a connecting structure disposed on the first surface, wherein the main body is connected to the middle frame via the connecting structure.

[0012] In some embodiments, the connection structure includes a first protrusion that protrudes from the first surface toward a side away from the second surface, the first protrusion being adapted to engage with the middle frame.

[0013] In some embodiments, there are two first protrusions; one of the two first protrusions extends along a first direction and the other extends along a second direction; wherein the first direction is parallel to the length direction of the mobile terminal and the second direction is parallel to the width direction of the mobile terminal; and / or, the peripheral wall of the first protrusion is provided with an annular groove surrounding itself, the annular groove being used to prevent the first protrusion from falling off the mid-frame.

[0014] In some embodiments, the first surface includes a first region and a second region, the first region protruding relative to the second region in a direction away from the second surface; the first protrusion is located in the second region.

[0015] In some embodiments, the impact protection device further includes a foolproof structure disposed on the first surface.

[0016] In some embodiments, the foolproof structure includes a foolproof groove recessed toward the second surface, the foolproof groove engaging with the middle frame for foolproof protection.

[0017] In some embodiments, the impact protection device includes a connecting structure comprising a plurality of protrusions protruding from the first surface in a direction away from the second surface; the first surface is used for adhesive bonding with the middle frame.

[0018] In some embodiments, the protrusion of the bump relative to the first surface is 0.1mm-0.2mm.

[0019] Secondly, embodiments of this application provide a mobile terminal, including: a mid-frame; and the aforementioned impact protection device, wherein the impact protection device is connected to the corner of the mid-frame.

[0020] In some embodiments, the body portion has a first surface facing the corner and a second surface facing away from the corner, the second surface protruding from the sidewall of the middle frame by a distance of 0.8mm-2mm along a first direction and / or a second direction; wherein, the first direction is parallel to the length direction of the mobile terminal, and the second direction is parallel to the width direction of the mobile terminal.

[0021] In some embodiments, the impact protection device includes a connecting structure comprising a first protrusion projecting from the first surface toward a side away from the second surface; the middle frame has a socket through which the first protrusion is inserted.

[0022] In some embodiments, the mobile terminal further includes a locking structure, wherein the peripheral wall of the first protrusion is provided with an annular groove surrounding itself, and the locking structure cooperates with the annular groove to restrict a portion of the first protrusion to the side of the socket facing away from the first surface.

[0023] In some embodiments, the inner side of the middle frame is provided with a glue groove, the glue groove is recessed toward the first surface and opposite to the insertion port, the annular groove is located in the glue groove, and the glue groove is provided with adhesive that is respectively bonded to the first protrusion and the middle frame, the adhesive forming the locking structure.

[0024] In some embodiments, the body portion has a first surface facing the corner and a second surface facing away from the corner, the impact protection device further includes a foolproof groove recessed into the first surface facing the second surface, and the middle frame has a foolproof protrusion that engages with the foolproof groove.

[0025] In some embodiments, the body portion has a first surface facing the corner and a second surface facing away from the corner. The impact protection device further includes a plurality of protrusions that protrude from the first surface away from the second surface. The protrusions are supported on the middle frame and support an adhesive space between the first surface and the middle frame. The adhesive space contains adhesive and the adhesive is connected to the first surface and the middle frame respectively.

[0026] In some embodiments, the middle frame has an inwardly recessed connecting portion, and a portion of the body portion is embedded in the connecting portion.

[0027] In some embodiments, the edge of the body portion and the edge of the middle frame located at the connecting portion interfere with each other, and the interference amount is 0.02mm-0.5mm.

[0028] This application provides an impact protection device and mobile terminal that protects the mobile terminal from drops by placing the main body at the corner of the mid-frame and making it protrude from the side walls on both sides of the corner. When the mobile terminal is dropped, bumped, or comes into contact with a hard object, the corner area no longer directly bears the impact as a rigid edge. Instead, the outwardly extended main body contacts the external load first, guiding the impact to the buffer structure for absorption and dispersion. This helps to shift the point of impact load outward, dispersing the stress peak originally concentrated at the corner to a larger contact area and a longer deformation path. Therefore, it helps to reduce the instantaneous impact intensity on the edge of the mid-frame, the edge of the screen, and internal support components, improving the impact resistance of the mid-frame corner area, mitigating stress concentration during drops, reducing the risk of local cracking and deformation, and thus enhancing the drop protection capability of the mobile terminal. It also helps to improve the structural reliability and appearance integrity of the mobile terminal in daily use environments.

[0029] Compared to an external protective shell placed on the outside of the mobile terminal, this impact protection device has the advantage of covering a smaller area of ​​the mobile terminal's outer shell, thus helping to reduce the adverse effects on the mobile terminal's heat dissipation and appearance. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 This is a first-view structural schematic diagram of the impact protection device provided in the embodiments of this application.

[0032] Figure 2 This is a structural schematic diagram from a second perspective of the impact protection device provided in the embodiments of this application.

[0033] Figure 3 This is a structural schematic diagram of the impact protection device provided in the embodiments of this application from a third perspective.

[0034] Figure 4 This is a structural schematic diagram of the impact protection device provided in the embodiments of this application from a fourth perspective.

[0035] Figure 5 This is a structural schematic diagram of a mobile terminal provided in the embodiments of this application from the first perspective.

[0036] Figure 6 This is a structural schematic diagram of a mobile terminal provided in an embodiment of this application from a second perspective.

[0037] Figure 7This is a structural schematic diagram of a mobile terminal provided in an embodiment of this application from a third perspective.

[0038] Figure 8 This is a schematic diagram of the structure of the middle frame provided in an embodiment of this application.

[0039] Figure 9 This is a schematic diagram of a portion of the structure of a mobile terminal after the screen has been removed, as provided in an embodiment of this application.

[0040] Figure 10 This is a schematic diagram from another perspective of the structure of a mobile terminal after the screen has been removed, as provided in an embodiment of this application.

[0041] Figure 11 This is a partial schematic diagram of the cross-section DD of the mobile terminal after the screen has been removed, as provided in the embodiments of this application.

[0042] Figure 12 for Figure 11 The circled portion E is an enlarged view.

[0043] Figure 13 This is a cross-sectional structural diagram of a portion of a mobile terminal provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached drawings: 100 - Body part; 110 - First surface; 111 - First region; 112 - Second region; 120 - Second surface; 130 - Flange; 200 - Buffer structure; 201 - Buffer cavity; 310 - First protrusion; 311 - Annular groove; 320 - Protrusion; 410 - Anti-foolproof groove; 500 - Middle frame; 501 - Insert; 510 - Corner; 520 - Middle frame sidewall; 530 - Adhesive groove; 540 - Anti-foolproof protrusion; 550 - Connecting part; 600 - Locking structure; 700 - Adhesive space; 800 - Screen.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0047] Because smartphones and other mobile devices are sometimes accidentally dropped during daily use, drop protection capability is an important indicator for mobile devices. A mobile device has a mid-frame, which forms the circumferential part of the device's casing, and the mid-frame has four corners.

[0048] In related technologies, the strength of the mobile terminal casing is improved by reinforcing only a portion of the material in the mid-frame, thereby enhancing the drop resistance of the mobile terminal device. However, when the mobile terminal is dropped, stress concentration easily occurs at the corners of the mid-frame, making the mobile terminal device susceptible to damage from the drop.

[0049] For example, when a mobile terminal is dropped, if the corner comes into contact with a hard object first, the corner itself is prone to damage or deformation, and the screen near the corner is prone to breakage. For instance, a deformed corner can easily squeeze the screen, which can then easily cause the screen corner to break.

[0050] For example, corner cracks can also easily lead to damage to the overall integrity of the mobile terminal's casing.

[0051] This application provides an impact protection device and a mobile terminal to improve the drop protection capability of the mobile terminal.

[0052] An impact protection device and mobile terminal provide drop protection by positioning the main body at the corner of the mid-frame and protruding it from the side walls on both sides of the corner. This impact protection device prevents the corner area from directly bearing the impact as a rigid edge when the mobile terminal is dropped, bumped, or comes into contact with a hard object. Instead, the outwardly extended main body contacts the external load first, guiding the impact to a buffer structure for absorption and dispersion. This helps to shift the point of impact load outward, dispersing the stress peak originally concentrated at the corner to a larger contact area and a longer deformation path. Therefore, it helps to reduce the instantaneous impact intensity on the mid-frame edge, screen edge, and internal support components, improving the impact resistance of the mid-frame corner area, mitigating stress concentration during drops, reducing the risk of localized cracking and deformation, and thus enhancing the drop protection capability of the mobile terminal. It also helps to improve the structural reliability and appearance integrity of the mobile terminal in everyday use environments.

[0053] It should be noted that, compared to an external protective shell placed on the outside of the mobile terminal, this impact protection device has the advantage of covering a smaller area of ​​the mobile terminal's outer shell. This helps to reduce the adverse effects on the mobile terminal's heat dissipation and appearance.

[0054] For example, refer to Figures 5 to 10As shown, the X-axis, Y-axis, and Z-axis are three mutually perpendicular coordinate axes in space. In the description of the embodiments of this application, the width direction of the mobile terminal is parallel to the X-axis; the thickness direction of the mobile terminal is parallel to the Y-axis; and the thickness direction of the mobile terminal is parallel to the Z-axis.

[0055] Reference Figures 1 to 13 As shown in the embodiment of this application, the impact protection device is used to protect the corner 510 of the mid-frame 500 of a mobile terminal. The impact protection device includes a main body 100 and a buffer structure 200.

[0056] The body portion 100 is adapted to be disposed at a corner 510 of the middle frame 500 and connected to the middle frame 500. The body portion 100 is used to protrude from the middle frame sidewalls 520 on both sides of the corner 510; for example, taking one corner 510 of a mobile terminal as an example, the middle frame sidewall 520 on one side of the corner 510 extends along a first direction, and the middle frame sidewall 520 on the other side of the corner 510 extends along a second direction. The body portion 100 protrudes from the middle frame sidewall 520 extending along the first direction along the second direction, and the body portion protrudes from the middle frame sidewall 520 extending along the second direction along the first direction. Along the circumference of the mobile terminal, the body portion 100 can completely cover the corresponding corner; or, in some possible embodiments, the body portion 100 can have a notch to expose a portion of the corner 510.

[0057] For example, the main body 100 and the middle frame 500 can be connected by means of adhesive, plug-in, snap-fit, or fastener connection to ensure a relatively stable installation state during repeated impacts and daily use. Accordingly, the main body 100 can be provided with a structure to facilitate adhesive, plug-in, snap-fit, or fastener connection.

[0058] For example, the body portion 100 may be an integrally formed corner protector, and the body portion 100 may have a rounded transition shape to improve stress concentration; or, the body portion 100 may be a hollow buffer shell that provides additional deformation space through an internal cavity; or, the body portion 100 may be a locally thickened flexible corner protector to form a partial cover around the corner 510 of the middle frame 500.

[0059] For example, the body portion 100 can be made of materials such as elastomers, thermoplastic polyurethane (TPU), silicone, rubber, flexible plastics or composites thereof, to balance flexibility, resilience and abrasion resistance.

[0060] For example, the distance by which the main body 100 protrudes from the side wall 520 of the middle frame on both sides of the corner 510 can be flexibly set according to requirements. For example, it can be selected between 0.5mm and 3mm, such as 0.5mm, 0.6mm, 1mm, 1.2mm, 1.23mm, 1.25mm, 1.3mm, 1.5mm, 2mm or 3mm, etc.

[0061] A buffer structure 200 is provided on the body portion 100. The buffer structure 200 is used to cause the body portion 100 to undergo, for example, elastic compression, local buckling, shear deformation or recoverable deformation when it is subjected to external impact, thereby prolonging the impact time, reducing the impact peak value and dispersing and attenuating the impact energy, thereby reducing the transmission of impact to the corner 510 of the middle frame 500 and its adjacent structures.

[0062] For example, the buffer structure 200 may be located inside the body part 100, in a local area of ​​the body part 100, or in a specific buffer part integrally formed with the body part 100. The two together constitute a corner protection unit and form an action path that releases energy from the outside to the inside when subjected to force, so that the impact force is first introduced through the outer contour of the body part 100 and then further absorbed by the buffer structure 200.

[0063] For example, the buffer structure 200 can be a honeycomb or mesh-like elastic support layer disposed inside the body portion 100 to generate stable compressive deformation under pressure; or, the buffer structure 200 can be a foamed elastic layer filling the cavity of the body portion 100 to achieve impact energy dissipation by utilizing the material's porous structure; or, the buffer structure 200 can be a corrugated, ribbed, or cavity-shaped buffer zone arranged in locally weak areas of the body portion 100 to adapt to load distribution under different drop postures. Accordingly, the material of the buffer structure 200 can be a foamed polymer, elastic gel, microporous rubber, soft composite material, or multilayer composite buffer material to achieve good energy absorption characteristics while ensuring rebound recovery capability.

[0064] For example, the size and proportion of the buffer structure 200 can be set according to the shape of the body 100 and the corner 510 space of the middle frame 500. The thickness, density or cavity distribution of the buffer structure 200 can be matched with the convex contour of the body 100 so that it will not significantly interfere with the structure of the middle frame 500 after assembly, and can provide sufficient deformation stroke and support stability when subjected to impact.

[0065] The impact protection device provided in this application embodiment can be used to protect the corner 510 of the mid-frame 500 of a mobile terminal. The impact protection device can protect the mobile terminal from drops by setting the main body 100 at the corner 510 of the mid-frame 500 and making it protrude from the side walls on both sides of the corner 510. This impact protection device prevents the corner 510 area from directly bearing the impact as a rigid edge when the mobile terminal is dropped, bumped, or comes into contact with a hard object. Instead, the outwardly expanded body 100 contacts the external load first, guiding the impact to the buffer structure 200 for absorption and dispersion. This helps to shift the point of impact load application outward, dispersing the stress peak originally concentrated at the corner 510 to a larger contact area and a longer deformation path. Therefore, it helps to reduce the instantaneous impact intensity on the edges of the mid-frame 500, the edges of the screen 800, and internal support components, improving the impact resistance of the corner 510 area of ​​the mid-frame 500. It also helps to mitigate stress concentration during mobile terminal drops, reducing the risk of local cracking and deformation, thus enhancing the drop protection capability of the mobile terminal. Furthermore, it helps to improve the structural reliability and appearance integrity of the mobile terminal in everyday use environments.

[0066] It should be noted that, compared to an external protective shell placed on the outside of the mobile terminal, this impact protection device has the advantage of covering a smaller area of ​​the mobile terminal's outer shell. This helps to reduce the adverse effects on the mobile terminal's heat dissipation and appearance.

[0067] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 10 , Figure 11 and Figure 12 As shown, in some embodiments, the body portion 100 has a first surface 110 facing the corner 510 and a second surface 120 facing away from the corner 510. The first surface 110 is used to connect with the middle frame 500. It can be understood that the first surface 110 can serve as an assembly reference surface for connecting the body portion 100 and the middle frame 500. For example, the first surface 110 can be fitted to the corner 510 of the middle frame 500 by means of adhesive, snap-fit, covering, or embedding to ensure a stable positioning relationship between the protective device and the middle frame 500.

[0068] The second surface 120 protrudes from the side walls 520 of the middle frame on both sides of the corner 510. Thus, the second surface 120 is preferentially used as the exposed impact surface when the mobile terminal is dropped or collided, so that the external impact acts first on the impact protection device rather than directly on the corner 510 of the middle frame 500.

[0069] The buffer structure 200 is disposed between the first surface 110 and the second surface 120. It can be understood that the buffer structure 200 constitutes a transition buffer. When the second surface 120 is subjected to external force, the buffer can be compressed, deformed or partially collapsed, and the impact load is distributed to the first surface 110 and the adjacent middle frame 500 area, thereby reducing the instantaneous impact peak.

[0070] Thus, the impact protection device can form a stable connection with the corner 510 of the middle frame 500 through the first surface 110 of the main body 100, which helps to improve the reliability of the impact protection device when installed at the predetermined installation position. When a drop or side impact occurs, the second surface 120, because it protrudes outward from the side walls 520 of the middle frame on both sides of the corner 510, will preferentially contact the ground or hard object and bear the initial impact. The external force is then transmitted to the buffer structure 200 between the second surface 120 and the first surface 110. The buffer structure 200 undergoes elastic compression or local deformation after being compressed, which helps to prolong the impact time and reduce the peak load, while diffusing some energy along the main body 100 to a larger contact area.

[0071] In this way, the first surface 110 is responsible for stable connection, and the second surface 120 is responsible for external protection. The two are transitioned by the buffer structure 200. Therefore, the impact force will not be directly concentrated on the sharp turning area of ​​the corner 510 of the mid-frame 500, but will be dispersed, mitigated, and redistributed to areas more conducive to bearing the load. This helps to achieve targeted protection for the corner 510 of the mid-frame 500, reducing the risk of cracking and deformation at the corner 510 and the transmission of impact to the edge of the screen 800 and internal components. This, in turn, helps to improve the structural reliability of mobile terminals with impact protection devices in usage scenarios such as drops and collisions.

[0072] For example, the first surface 110 may be configured as a flat surface, a slightly curved surface, or a mating surface with a rough texture that adapts to the outer contour of the corner 510 of the middle frame 500, so as to enhance the contact area and connection reliability with the middle frame 500.

[0073] For example, the second surface 120 may be formed as a convex arc surface, a rounded corner covering surface, or a chamfered transition surface, so as to guide the direction of force during collision and reduce local stress concentration caused by sharp contact.

[0074] For example, the buffer structure 200 can take the form of a hollow cavity, a honeycomb grid, an annular rib, a corrugated elastic layer, or a locally thinned compressible structure. The material of the body 100 can be TPU, TPE (Thermoplastic Elastomer), silicone, rubber, or a composite elastomer thereof, so as to maintain a certain degree of resilience and durability under repeated impact conditions.

[0075] For example, the first surface 110 can improve the adhesion effect by roughening the surface or adding micro-grooves, while the second surface 120 can retain a relatively complete exposed elastic layer to directly withstand impact.

[0076] For example, the fit width of the first surface 110 can be matched with the force contact width of the corner 510 of the middle frame 500 to avoid local suspension or off-center loading.

[0077] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the buffer structure 200 includes a buffer cavity 201. Thus, by providing the buffer cavity 201, the body portion 100 can be provided with active buffering capability, enabling the body portion 100 to undergo controlled deformation and absorb part of the impact energy when subjected to impact from the ground or a hard object, thereby helping to reduce the probability of the load being directly transmitted to the connection area between the middle frame sidewall 520 and the corner 510.

[0078] Thus, when a mobile terminal with impact protection is dropped or colliding, the first surface 110 of the body 100 first contacts the external impact load. The buffer cavity 201 is compressed, causing the cavity wall to elastically bend and locally deform. The impact energy is thus dispersed and converted into internal strain energy (when the body 100 includes an elastic material) or gas compression energy (when the buffer cavity 201 is a closed structure). Subsequently, after the external force is released, the cavity recovers its original shape by material rebound, thereby helping to reduce the instantaneous impact intensity on the corner 510 of the middle frame 500. The buffer cavity 201 can provide a more direct and stable internal buffer path for the corner 510 of the middle frame 500 without relying on external additional protective components, reducing stress concentration and the risk of local damage, and helping to improve the structural durability and protective reliability of the mobile terminal with impact protection under repeated collision conditions.

[0079] For example, the buffer cavity 201 can be a closed cavity, a semi-closed cavity, or a combination of multiple independent or interconnected sub-cavities to adapt to the force characteristics under different drop postures.

[0080] For example, the buffer cavity 201 can be configured as a long cavity, annular cavity, elliptical cavity, honeycomb multi-cavity cavity or spherical crown cavity, so that impacts from different directions can obtain corresponding compression deformation paths.

[0081] For example, the material of the body part 100 surrounding the buffer cavity 201 can be an elastic material, soft plastic or elastic composite material, such as silicone, thermoplastic elastomer, elastic polyurethane or composite resin with certain resilience, so that the cavity wall can return to its original shape after the impact and maintain the structural stability during long-term use.

[0082] For example, the buffer cavity 201 can be formed by foam molding, core-pulling injection molding, hollow injection molding, or post-processing opening, so as to take into account both processing feasibility and structural consistency.

[0083] For example, the size and proportion of the buffer cavity 201 can be set according to the overall protection requirements of the machine. For instance, the proportion of the cavity volume of the buffer cavity 201 to the total volume of the main body 100 should be increased as much as possible without significantly weakening the bearing strength of the outer periphery, so as to provide a more sufficient compression stroke. The cavity wall thickness needs to be matched with the material strength, resilience performance and expected impact load so that it can produce controllable deformation when subjected to external force without cracking or permanent collapse.

[0084] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the buffer cavity 201 extends through the body portion 100 along the thickness direction of the mobile terminal. It is understood that this through-type structure, compared to partial blind holes or closed cavities, can obtain a more sufficient compression stroke and ventilation path, and is especially suitable for instantaneous force scenarios when the mobile terminal is dropped from a table, collided with a corner, or pressed by a hard object.

[0085] Thus, when the mobile segment with the impact protection device falls and impacts, the external force first acts on the exposed second surface 120 of the main body 100 and pushes the cavity wall of the buffer cavity 201 inward to compress it. The air inside the penetrating buffer cavity 201 is then discharged along the thickness direction. The cavity wall of the buffer cavity 201 deforms under the action of elasticity and material toughness and absorbs part of the impact energy. After the external force is released, the cavity and the surrounding walls return to their initial state, which helps to reduce the concentrated impact on the corner 510 of the middle frame 500 of the mobile terminal with the impact protection device, and helps to reduce the risk of corner 510 cracking, deformation and damage to internal components.

[0086] For example, the buffer cavity 201 can be configured as a round hole, an elongated hole, an oblong hole, or an irregularly shaped perforation, or it can be distributed in the corner 510 area of ​​the body part 100 in the form of an array of multiple through holes to serve as the buffer cavity 201.

[0087] For example, the material of the body 100 can be a material with a certain elastic recovery ability, such as TPU, silicone, rubber, TPE or flexible resin, so as to form a stable deformation when subjected to pressure and return to its original shape after the external force is removed.

[0088] For example, the through-hole buffer cavity 201 can be formed by compression molding, injection molding core pulling, punching or laser processing. Its hole diameter, hole length or hole width can be matched and designed according to the wall thickness of the body part 100, the width of the corner 510 and the expected impact energy. For example, the minimum edge thickness of the through-hole cavity can be kept within a range sufficient to support the structural integrity, so as to avoid weakening the connection strength between the body part 100 and the middle frame 500 due to excessive opening.

[0089] For example, the size of the through cavity can be coordinated with the overall shape of the body 100 so that it does not significantly affect the assembly interference fit and appearance continuity while ensuring the buffer stroke. It can also form a single through hole, multiple parallel through holes, or a structure combining local through and local reinforcement in the thickness direction as needed.

[0090] Reference Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the wall thickness of the body portion 100 on the side of the buffer cavity 201 facing away from the first surface 110 is 1mm-2mm; in other words, the dimension A is 1mm-2mm. For example, the dimension A can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm, etc. Of course, the embodiments of this application do not limit this, and can reasonably select within the above range.

[0091] This embodiment, by designing dimension A to be 1mm-2mm, helps to reserve necessary deformation space for the buffer cavity 201 while ensuring sufficient tear resistance and resilience of the wall. This dimensional design helps the buffer cavity 201 maintain basic structural stability after repeated impacts and provides sufficient deformation stroke, thus effectively suppressing the direct transmission of impacts to the corner 510 of the mid-frame 500 of the mobile terminal with the impact protection device, reducing the risk of stress concentration, material cracking, and damage to the edges or internal components of the screen 800 at the corner 510. In summary, the limitation of dimension A allows the impact protection device to maintain a snug fit while balancing load-bearing capacity and cushioning performance, thereby improving the reliability of mobile terminals using mobile protection devices in scenarios such as drops and impacts.

[0092] For example, the wall of the body portion 100 located on the side of the buffer cavity 201 facing away from the first surface 110 can be a continuous wall of uniform thickness; or the wall can be a locally thickened reinforcing wall, or a gradient wall or arc-shaped wall that gradually changes along the height direction; elastic reinforcing ribs can also be integrally formed on the inner or outer side of the wall to effectively achieve the wall thickness support function; the material of the wall can be one or more of the following: TPU, elastic rubber, soft plastic, thermoplastic elastomer, or elastic composite material. The wall can be manufactured by injection molding, overmolding, compression molding, or secondary curing processes.

[0093] It should be noted that if the size of A is too small (e.g., less than 1 mm), the supporting capacity of the buffer cavity 201 is likely to be weak, which in turn can lead to a weak buffering capacity of the main body 100. If the size of A is too large (e.g., greater than 2 mm), it can either compress the volume of the buffer cavity 201 or make the size of the main body 100 too large, which is not conducive to the compactness of the impact protection device structure, nor is it conducive to the compactness of the structure of the mobile terminal using the impact protection device.

[0094] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the body portion 100 includes an elastic material. Thus, by providing the elastic material, the body portion 100 can absorb part of the impact energy through elastic deformation. The elastic material can also work in conjunction with the aforementioned buffer structure 200 to disperse and delay the impact load at the moment of contact, preventing the load from being directly concentrated on the side wall 520 of the mid-frame and the edge of the screen 800 of the mobile terminal with the impact protection device.

[0095] This embodiment sets the body 100 to include an elastic material, which helps the impact protection device maintain stable cushioning performance under multiple drop or impact scenarios, and reduces the risk of permanent deformation, cracking and assembly loosening during long-term use. It also helps improve the structural durability and impact resistance reliability of the corner 510 area of ​​the mobile terminal with the impact protection device.

[0096] For example, the elastic material in the body portion 100 can be integrally formed, or it can be an elastic layer covering the outside, or a highly elastic buffer strip formed in a local stress area.

[0097] For example, the elastic material may be made of one or more of thermoplastic polyurethane, thermoplastic elastomer, silicone, natural rubber, nitrile rubber, foamed elastomer, etc.

[0098] For example, the hardness, elastic modulus, and thickness of the elastic material can be selected according to the target protection level; for example, the outer layer of the body 100 can be made of a wear-resistant medium-to-high hardness elastomer, and the inner layer can be made of a soft material with lower hardness, so as to form a stepped buffering effect of contact first and then energy absorption.

[0099] For example, the thickness of the elastic material of the body 100 can be adapted to its outward protrusion and the size of the internal buffer cavity 201 to ensure sufficient deformation stroke without significantly increasing the overall size of the machine. For example, the thickness of the elastic material can also be adapted according to the radius of curvature of the corner 510 of the middle frame 500 and the protection level.

[0100] Reference Figures 1 to 5 As shown, in some embodiments, the impact protection device further includes a connecting structure disposed on the first surface 110, and the main body 100 is connected to the middle frame 500 through the connecting structure. Thus, by providing the connecting structure, the impact protection device can be easily connected to the middle frame 500 of the mobile terminal, which helps to stabilize the assembly interface between the two and clarify the force path. This allows the relative position between the protective component and the middle frame 500 to be maintained when the main body 100 is subjected to external pressure, thereby ensuring that the buffer structure 200 remains in an effective working state and preventing secondary impacts caused by loosening of the protective component.

[0101] Thus, this embodiment helps to enhance the installation reliability of the impact protection device at the corner 510 of the mid-frame 500, and helps to distribute the impact force more stably through the body 100, the connecting structure and the mid-frame 500, thereby helping to reduce the possibility of cracking, local deformation of the corner 510 where the impact protection device is applied and edge damage to the screen 800, and improving the drop resistance and collision resistance of the mobile terminal in complex usage scenarios.

[0102] For example, the connection structure can be a structure for plug-in connection, a structure for snap-fit ​​connection, a structure for adhesive connection, or a structure for welded connection, etc. For instance, the connection structure can be configured as an annular adhesive layer extending along the periphery of the first surface 110, an undercut tab provided along a partial edge, or a boss for embedding into the mating groove of the middle frame 500, etc., or an independent connecting piece provided on the first surface 110.

[0103] For example, the connection structure can be a protrusion, groove, step, adhesive layer, plug arm, or adhesive reinforcement layer, as long as it can form a stable mechanical or chemical connection between the first surface 110 and the middle frame 500.

[0104] For example, the connecting structure and the body 100 can be integrally molded. For instance, the connecting structure and the body 100 can be injection molded simultaneously using the same elastic material. Alternatively, the connecting structure and the body 100 can be relatively independent structures (as opposed to integral molding). For instance, the connecting structure can be made of high-toughness plastic, metal sheet, rubber insert, or hot melt adhesive layer to accommodate different materials and assembly processes of the middle frame 500.

[0105] Reference Figure 1 , Figure 2 , Figure 3 , Figure 9 and Figure 13 As shown, in some embodiments, the connecting structure includes a first protrusion 310, which protrudes from the first surface 110 toward a side away from the second surface 120. The first protrusion 310 is adapted to be inserted into the middle frame 500. When the impact protection device is installed on the middle frame 500, the first protrusion 310 can preferentially enter the pre-set insertion hole of the middle frame 500 to facilitate the limiting of the impact protection device through the cooperation of the first protrusion 310 with the corresponding hole or other auxiliary structure of the middle frame 500. In this way, after the impact protection device is assembled on the middle frame 500, it helps to limit the displacement of the body part 100 along the extension direction of the first protrusion 310 and laterally (perpendicular to the extension direction of the first protrusion 310), which helps to improve the stability of the impact protection device connection at the application position. It can also disperse some of the impact force to the local structure of the middle frame 500 when the mobile terminal with the impact protection device is dropped, preventing the connecting part 550 from slipping or falling off under instantaneous impact.

[0106] Thus, even under repeated impacts, temperature and humidity changes, or long-term use, the impact protection device can still maintain a relatively stable assembly state in the corresponding application location, which helps to reduce connection failures caused by factors such as adhesive aging, peeling, or warping.

[0107] In summary, the first protrusion 310 provides clear guidance and limiting for the installation position of the main body 100, helping the buffer structure 200 to remain stably in the high-risk stress area of ​​the corner 510. This allows the main body 100 to deform and absorb energy to a certain extent before the impact reaches the middle frame 500, further reducing the peak load acting on the corner 510 of the middle frame 500 and the edge area of ​​its adjacent screen 800. This embodiment helps improve the connection stability and protective reliability of the impact protection device at its application location, ensuring good assembly consistency and anti-detachment capability during daily handling, carrying, and drop scenarios of mobile terminals, thereby improving the overall impact resistance performance at the corner 510 of the middle frame 500.

[0108] For example, the first protrusion 310 can be a cylindrical boss, a square column plug, a wedge plug tongue, a mushroom head-shaped snap post, or a snap post with an elastic sheet. It can also be a strip-shaped protrusion extending along the length of the body portion 100, or multiple point-shaped positioning posts distributed at different positions. The material of the first protrusion 310 can be the same as that of the body portion 100. For example, the first protrusion 310 and the body portion 100 can be integrally injection molded. Alternatively, the first protrusion 310 and the body portion 100 can be processed separately and connected by means of adhesive, welding, connectors, or connecting structures.

[0109] For example, the first protrusion 310 may be a rigid plastic insert, an elastomer boss, or a rubber-coated composite structure to balance insertion strength and assembly flexibility.

[0110] For example, the dimensions of the first protrusion 310 can be configured to match the diameter, depth, and wall thickness of the insertion hole of the middle frame 500.

[0111] For example, the diameter or cross-sectional width of the first protrusion 310 can be set to be slightly smaller than the aperture to form a clearance fit, or slightly larger than the aperture to form an interference fit, depending on the wall thickness of the middle frame 500. It can also achieve an elastic engagement with the mating position by chamfering, introducing bevel, or local elastic arm.

[0112] For example, the number, spacing and arrangement direction of the first protrusions 310 can also correspond one-to-one with the position of the holes and slots of the middle frame 500 to avoid assembly misalignment, which helps to improve assembly accuracy.

[0113] Reference Figure 1 , Figure 2 , Figure 3 , Figure 9 and Figure 13 As shown, in some embodiments, the impact protection device has two first protrusions 310; one of the two first protrusions 310 extends along a first direction and the other extends along a second direction; wherein, the first direction is parallel to the length direction of the mobile terminal and the second direction is parallel to the width direction of the mobile terminal.

[0114] Thus, when the impact protection device is assembled, the two first protrusions 310 can constrain the position of the impact protection device in the length and width directions of the middle frame 500, thereby helping to improve the bidirectional (first direction and second direction) positioning accuracy of the body 100 relative to the middle frame 500, and helping to enhance the impact protection device installed at the application position to resist displacement when subjected to lateral tension, torsional force or impact vibration.

[0115] For example, the first protrusion 310 can be configured as a strip-shaped protrusion, a columnar protrusion, a tongue with a guide bevel, a cross-shaped protrusion, or a T-shaped protrusion, etc.

[0116] For example, the material of the first protrusion 310 can be an elastomer, plastic, elastic coating material or composite material with a certain toughness, so as to generate moderate elastic deformation during insertion and form a reliable lock after insertion.

[0117] Understandably, the spacing and cross-sectional dimensions of the two first protrusions 310 are adapted to the arrangement of the corresponding holes on the middle frame 500.

[0118] In some embodiments, the peripheral wall of the first protrusion 310 is provided with an annular groove 311 surrounding itself, which is used to prevent the first protrusion 310 from falling off the middle frame 500. In this way, the design of two first protrusions 310 extending in different directions combined with the annular groove 311 can simultaneously establish positioning references in the length and width directions of the mobile terminal, thereby helping to reduce the risk of displacement of the body 100 during installation and use. The annular groove 311 further helps to improve the mechanical holding force between the connecting structure and the middle frame 500, so that the body 100 can still be stably maintained in the predetermined installation position when subjected to drop impact, repeated vibration or external pulling, which is conducive to maintaining the continuous protection of the corner 510 of the middle frame 500 by the impact protection device.

[0119] For example, the annular groove 311 can be a structure that is continuously formed circumferentially around the first protrusion 310; or, in some possible embodiments, the annular groove 311 can also be a partially discontinuous structure, a semi-annular groove, or an inverted groove that cooperates with the locking edge of the middle frame 500.

[0120] For example, the annular groove 311 is used to prevent the first protrusion 310 from falling off the middle frame 500 after the first protrusion 310 is inserted into the middle frame 500 through the interference, snapping or limiting relationship formed between the groove of the annular groove 311 and the edge of the hole of the middle frame 500 or other auxiliary structures (such as an annular structure or colloid fitted on the annular groove 311).

[0121] For example, the annular groove 311 can be arranged at the middle of the first protrusion 310 along its own extension direction or near the end of the first protrusion 310 (which can be the end of the first protrusion 310 near the first surface 110 or the end of the first protrusion 310 away from the first surface 110). The groove depth, groove width and groove edge chamfer of the annular groove 311 can be set according to the requirements of forming a reliable mechanical lock, while avoiding significantly weakening the overall strength of the first protrusion 310.

[0122] Reference Figure 1 , Figure 3 and Figure 8As shown, in some embodiments, the first surface 110 includes a first region 111 and a second region 112, the first region 111 protruding relative to the second region 112 in a direction away from the second surface 120; a first protrusion 310 is located in the second region 112. Thus, the first surface 110 is configured as a partially convex structure.

[0123] Firstly, this helps to improve the ease of assembly and positioning of the body part 100 at the corner 510 (for example, a concave-convex shape suitable for matching the concave-convex characteristics of the first surface 110 can be provided at the corresponding corner 510), and helps to improve the assembly accuracy of the body part 100 at the corner 510.

[0124] Secondly, by arranging the first protrusion 310 in the second region 112, the first protrusion 310 can avoid the outward convex contour of the first region 111, which helps to reduce assembly interference caused by the height difference (which exists in the junction area between the first surface 110 and the first protrusion 310), thereby helping to improve the assembly consistency and insertion stability of the impact protection device at the corner 510.

[0125] Thirdly, the first region 111 is more likely to form a support or guide fit with the outer side of the corner 510 of the middle frame 500 after assembly. At the same time, the second region 112 provides space for the arrangement of the first protrusion 310. When the mobile terminal with the impact protection device falls, the impact load can not only be initially mitigated and dispersed by the first region 111, but also dispersed and transmitted to the middle frame 500 by the second region 112 and the first protrusion 310. This helps to reduce the concentrated transmission of the impact peak to the corner 510 of the middle frame 500, helps to reduce the risk of local damage to the middle frame 500, and helps to improve the connection reliability of the impact protection device at the application location, as well as the impact resistance stability of the mobile terminal with the impact protection device.

[0126] For example, the first region 111 can be a stepped convex surface, an arc-shaped convex surface, a sloping transition surface, or a flexible flange formed by partial adhesive coating; the second region 112 can be a plane, a shallow concave surface, a reinforcing rib bearing surface, or a local positioning platform.

[0127] For example, the first protrusion 310 can take different forms such as columnar protrusion, strip protrusion, mushroom-shaped protrusion or inverted protrusion to adapt to different middle frame 500 plug-in structures.

[0128] For example, the first region 111 and the second region 112 can be integrally molded from the same elastic material, or they can be formed by a hard-soft composite structure, such as an outer layer made of silicone, thermoplastic elastomer or elastic polyurethane, and an inner layer made of polycarbonate, nylon or reinforced plastic with higher rigidity.

[0129] For example, the first region 111 can be made of a softer material to enhance the cushioning and absorption capacity, while the second region 112 and the first protrusion 310 can be made of a harder material to ensure the insertion strength; the high and low partition structure can also be formed by secondary overmolding, local thickening or co-injection molding process.

[0130] Reference Figure 1 , Figure 3 and Figure 8 As shown, in some embodiments, the impact protection device further includes a foolproof structure disposed on the first surface 110.

[0131] Thus, when the impact protection device is assembled at the corner 510 of the mobile terminal frame 500, the foolproof structure can first contact the corresponding foolproof part on the frame 500, and guide and correct the body 100 during the insertion or pressing process, so that the body 100 can only enter the installation state in a predetermined direction and predetermined position; when the body 100 reaches the designed installation position, a stable limiting relationship is formed between the foolproof structure and the frame 500, which, together with the aforementioned connection structure and the bonding structure of the first surface 110, ensures the relative positional accuracy between the body 100 and the corner 510.

[0132] In this way, when the mobile terminal is dropped or collided, the body part 100 located outside the corner 510 can preferentially contact the external force according to the predetermined posture. The buffer structure 200 then undergoes elastic deformation and absorbs part of the impact energy. The foolproof structure helps to ensure that this buffering effect always occurs in the high-risk force-bearing area of ​​the corner 510 of the mid-frame 500, avoiding the transfer of impact load to the edge of the screen 800 or internal components due to installation deviation.

[0133] In summary, this embodiment, by setting a foolproof structure, helps to reduce the probability of misinstallation of the impact protection device during the assembly stage, helps to improve the product consistency of mass production applications of the impact protection device, and indirectly helps to improve the actual protection reliability of the impact protection device for the corner 510 of the mid-frame 500 during the use stage, thereby helping to enable the mobile terminal to obtain a more stable and repeatable protection effect when subjected to external impacts.

[0134] For example, the anti-mistake structure can take the form of one or more of the following: boss, notch, keyway, positioning edge, or asymmetrical contour. It can also be a combination of local protrusions and recesses formed on the first surface 110. In one specific implementation, the anti-mistake structure can be integrally formed with the first surface 110 so as to be injection molded or die-cast simultaneously with the body 100. Alternatively, in another embodiment, the anti-mistake structure can be formed by insert embedding, local overmolding, or local hardening layer, thereby maintaining the overall strength of the body 100 while satisfying the orientation recognition function. Based on the above analysis, it can be seen that the anti-mistake structure not only plays an assembly guiding role, but also forms an auxiliary constraint on the installation position of the body 100 after assembly, so that the impact protection device is always in the correct posture corresponding to the corner 510 of the middle frame 500, avoiding the buffer structure 200 from deviating from the stress point due to assembly errors and affecting the protective effect.

[0135] For example, the foolproof structure can be set with asymmetrical contour features, such as one side of the first surface 110 of the body portion 100 having a rounded transition and the other side having a right-angled edge or an irregular edge, so that the mounting part can only be inserted into the assembly area corresponding to the middle frame 500 in a predetermined direction.

[0136] For example, the foolproof structure can also be configured as a set of matching positioning protrusions 320 and positioning holes, or as a beveled inlet portion and a stop portion that cooperate to gradually correct the posture of the body portion 100 during the insertion process.

[0137] For example, the feature size of the foolproof structure can be set to be able to clearly distinguish the installation direction without significantly occupying the corner 510 buffer area, so as to accommodate the small installation space at the corner 510 of the mobile terminal frame 500.

[0138] For example, the height, depth, or offset of the anti-foolproof structure can be set according to the tolerance of the corresponding anti-foolproof part of the middle frame 500, so as to avoid interference between the first surface 110 and the mating surface of the middle frame 500 while ensuring the orientation recognition effect.

[0139] For example, if the foolproof structure is in the form of a boss, the boss can be rectangular, circular, trapezoidal or stepped, and the material of the boss can be the same as that of the body part 100, such as elastic material, engineering plastic or metal-coated structure, so as to form an integrated load-bearing structure with the body part 100.

[0140] For example, if the foolproof structure is in the form of a notch or keyway, the edges of the notch can be chamfered or rounded to improve insertion smoothness and reduce assembly scratches.

[0141] For example, if the error-proof structure adopts an irregular contour, the unique assembly direction can be identified through the asymmetry of the contour, thereby reducing the error rate of manual assembly.

[0142] It should be noted that the specific form of the foolproof structure can be adjusted according to the shape of the corner 510 of the middle frame 500, the installation space, and the assembly process. The core of different forms of foolproof structures lies in achieving the correct installation of the main body 100 through the directional limiting feature set on the first surface 110.

[0143] Reference Figure 1 , Figure 3 and Figure 8 As shown, in some embodiments, the foolproof structure includes a foolproof groove 410, which is recessed toward the second surface 120 and engages with the middle frame 500 in a foolproof manner.

[0144] Thus, the impact protection device, by providing the anti-foolproof groove 410, facilitates its cooperation with the corresponding anti-foolproof component on the middle frame 500. During assembly of the impact protection device, the anti-foolproof component on the middle frame 500 first contacts the opening area of ​​the anti-foolproof groove 410, and then, guided by the anti-foolproof groove 410, enters the interior of the anti-foolproof groove 410 in a predetermined direction, and completes attitude verification under the constraint of the complementary shape relationship; when the main body 100 and the anti-foolproof structure of the middle frame 500 are fully aligned, the connecting structure can further complete the insertion or snap-fit ​​fixation, so that the impact protection device is stably set at the corner 510 of the middle frame 500.

[0145] Because the anti-misalignment groove 410 and the anti-misalignment component of the middle frame 500 form a clear directional constraint and positional limitation, it can effectively suppress assembly reversal, skewness, and misalignment, prevent the buffer structure 200 from losing its correspondence with the actual stress area, and reduce loosening, warping, or local interference caused by poor assembly. The anti-misalignment groove 410 helps ensure that the impact protection device is in the correct installation posture for a long time, thereby making the corner protection function of 510 more stable.

[0146] For example, the anti-misfit groove 410 can be set as a circular groove, a long groove, a blind groove, an irregular groove, a stepped groove, or a groove with an inlet bevel. When there is an asymmetrical contour at the corner 510 of the middle frame 500, the anti-misfit groove 410 can also be set as an asymmetrical recess corresponding to the contour to further enhance the anti-misassembly capability.

[0147] For example, the material forming the anti-misalignment groove 410 may be the same as that forming the body portion 100; or, the material forming the anti-misalignment groove 410 may be a relatively flexible (relative to the body portion 100) elastic material so as to produce appropriate deformation compensation during mating.

[0148] Reference Figure 1 , Figure 3 , Figure 11 and Figure 12As shown, in some embodiments, the impact protection device includes a connecting structure, which includes a plurality of protrusions 320, the protrusions 320 protruding from the first surface 110 in a direction away from the second surface 120; the first surface 110 is used for adhesive connection with the middle frame 500.

[0149] Thus, when the impact protection device is installed on the middle frame 500, the protrusions 320 can support a certain space between the first surface 110 and the middle frame 500. This space can accommodate the adhesive, thereby helping to ensure sufficient adhesive layer thickness between the first surface 110 and the middle frame 500. Furthermore, these protrusions 320 have a certain effect on inhibiting the flow of liquid adhesive, helping to prevent liquid adhesive from overflowing from the edges of the area between the first surface 110 and the middle frame 500, thus helping to ensure the uniformity of the adhesive layer. Moreover, these protrusions 320 also help to enhance the coverage and anchoring effect of the adhesive layer around the protrusions 320, slowing down the peeling and expansion of the adhesive layer under drop, impact, or long-term vibration conditions, improving the durability and impact resistance of the connection interface, thereby enabling the body 100 to remain more stably at the corner 510 position and continuously provide cushioning protection.

[0150] For example, the protrusion 320 may be one or more of the following: a spherical cap point, a hemispherical point, a cylindrical point, a conical point, a short rib point, or a lattice step.

[0151] For example, the protrusion 320 can be integrally formed from the same material as the body portion 100; or, the protrusion 320 can be formed by partial additive manufacturing, injection molding, hot pressing, or surface hardening treatment of the body portion 100.

[0152] For example, the surface of the bump 320 may also be provided with a micro-rough texture, microporous structure or chamfer transition to facilitate colloid spreading, venting and the formation of a more stable mechanical interlock after curing.

[0153] Reference Figure 1 , Figure 3 , Figure 11 and Figure 12 As shown, in some embodiments, the protrusion distance of the protrusion 320 relative to the first surface 110 is 0.1mm-0.2mm; in other words, the dimension B is 0.1mm-0.2mm.

[0154] Thus, when the main body 100 is aligned with the middle frame 500, the protrusion 320 first contacts and provides support to form a certain space for the adhesive. This helps the adhesive to spread evenly between the first surface 110 and the middle frame 500, and makes the thickness of the adhesive layer moderate. This helps to reduce the risk of bonding failure caused by excessively thick or thin adhesive layers or local gaps. It also helps to improve the assembly consistency and service reliability of the impact protection device under repeated vibration, temperature changes and daily impact environments.

[0155] For example, dimension B can be 0.1mm, 0.11mm, 0.119mm, 0.12mm, 0.125mm, 0.13mm, 0.14mm, 0.16mm, 0.18mm, or 0.2mm. Of course, the embodiments of this application do not limit this, and the dimension of B can be reasonably selected within the above range.

[0156] It should be noted that when the size of B is small (e.g., less than 0.1 mm), the adhesive layer between the first surface 110 and the middle frame 500 may be too thin during application, which is detrimental to the secure connection of the impact protection device to the middle frame 500. When the size of B is large (e.g., greater than 0.2 mm), the adhesive layer between the first surface 110 and the middle frame 500 may be too thick during application, which is detrimental to the compactness of the mobile terminal structure using the impact protection device.

[0157] For example, the adhesive used for bonding the first surface 110 and the middle frame 500 may be a hot melt adhesive.

[0158] For example, the bump 320 may be an elastic boss, a short columnar support point, or a micro-dot structure integrally formed with the body 100. Some bumps 320 may also be flat-headed dot matrix structures. The material of the bump 320 may be one or more of the following materials: TPU, silicone, TPE, or flexible plastic, so as to generate appropriate elastic deformation during pressing and adapt to the flatness error of the surface of the middle frame 500.

[0159] Reference Figures 1 to 13 As shown, the mobile terminal provided in this embodiment includes a mid-frame 500 and an impact protection device provided in this embodiment, wherein the impact protection device is connected to the corner 510 of the mid-frame 500.

[0160] It should be noted that the mid-frame 500 refers to the frame structure that constitutes the load-bearing skeleton of the mobile terminal. It can be used to provide assembly reference, circumferential support and force transmission path for the screen 800, back cover and internal modules, and bear the main structural force and load distribution functions when the mobile terminal is subjected to external impact.

[0161] For example, the middle frame 500 is set on the outer periphery of the mobile terminal and forms a frame outline around the main body of the device. Its corner 510 area is the position where the edge of the frame turns, which is usually the sensitive part that will first come into contact with the ground in the event of a drop.

[0162] The mid-frame 500 has four corners 510. For example, the impact protection device provided in this application embodiment can be provided at all four corners 510 of the mobile terminal; or, in some possible embodiments, the impact protection device provided in this application embodiment can be provided only at one, two, or three of the corners 510 of the mobile terminal, while the remaining corners 510 are not provided with the impact protection device provided in this application embodiment.

[0163] For example, a mobile terminal can be a mobile phone, tablet computer, laptop computer, handheld game console, e-reader, or tablet learning device, etc. This application embodiment mainly uses a mobile phone as the mobile terminal for description.

[0164] The mobile terminal provided in the application embodiment, by setting the impact protection device provided in this application embodiment, when the mobile terminal is slipped from the hand, dropped from the edge of the table, or colliding with a hard object during daily use, the impact protection device set at the corner 510 of the middle frame 500 can preferentially serve as the contact point to contact the external impact surface. Since the main body 100 of the protection device is connected to the corner 510 of the middle frame 500 and has a certain covering or outward convex relationship with the outer peripheral edge of the middle frame 500, the impact load can first enter the buffer structure 200 through the outer force-bearing surface of the protection device, and then the impact energy is gradually absorbed and dispersed by the elastic compression, bending deformation or local buckling of the buffer structure 200. Subsequently, the remaining load is smoothly transferred to the load-bearing frame of the middle frame 500 by the main body 100.

[0165] Since the corner 510 is originally a region with obvious geometric transitions and easy stress concentration, if the impact is directly borne by the middle frame 500 body, a local high stress peak can easily form in a short time. In this embodiment, by adding a protective device connected to the middle frame 500 in this area, the originally concentrated force path is extended and redistributed through the elastic material and buffer structure 200, thereby reducing the direct effect of the impact peak on the edge of the screen 800, internal connectors and motherboard and other precision components.

[0166] Furthermore, since the impact protection device can adopt a contoured structure, covering structure or modular structure that is compatible with the shape of the middle frame 500, it can form a relatively stable connection interface with the corners of the middle frame 500 after assembly. This is beneficial for maintaining the positional stability of the protective component during repeated drops and daily friction, and can also provide targeted corner protection for the mobile terminal without relying on an external protective cover.

[0167] By combining the impact protection device with the corner 510 of the mid-frame 500, while maintaining the overall integrity, portability and appearance of the mobile terminal, it helps to improve the impact resistance of the corner 510 of the mid-frame 500, reduce the risk of the corner 510 becoming the failure point during a drop, and correspondingly improve the structural reliability and safety of the mobile terminal.

[0168] For example, the mid-frame 500 can be manufactured using plastic to balance lightweight design with some deformation buffering capability.

[0169] For example, the middle frame 500 can be made of metal to improve overall rigidity and structural strength.

[0170] For example, the middle frame 500 can be a composite structure of metal and plastic to maintain support performance in critical stress areas and introduce cushioning or covering structures locally.

[0171] For example, the thickness of the middle frame 500, the height of the side walls, and the radius of the corner 510 can be matched and set according to the thickness of the terminal as a whole, the layout of internal components, and the appearance design.

[0172] It should be noted that the corner 510 of the middle frame 500 is adapted to the outer contour of the impact protection device to ensure that the two form a stable mating interface after assembly.

[0173] In some embodiments, the body portion 100 has a first surface 110 facing the corner 510 and a second surface 120 facing away from the corner 510. The second surface 120 protrudes from the side wall 520 of the middle frame by a distance (hereinafter referred to as dimension C) of 0.8 mm to 2 mm along the first direction and / or the second direction. The first direction is parallel to the length direction of the mobile terminal, and the second direction is parallel to the width direction of the mobile terminal.

[0174] For example, taking one corner 510 of the middle frame 500 as an example, the middle frame sidewall 520 on one side of the corner 510 extends along a first direction, and the middle frame sidewall 520 on the other side of the corner 510 extends along a second direction. The protrusion distance of the body portion 100 from the middle frame sidewall 520 extending along the first direction along the second direction is 0.8mm-2mm; the protrusion distance of the body portion from the middle frame sidewall 520 extending along the second direction along the first direction is 0.8mm-2mm.

[0175] Thus, the second surface 120 forms an overhang of 0.8 mm to 2 mm relative to the middle frame sidewall 520 in the first and / or second directions, so that a deformable protective profile is added to the corner 510 outside the original boundary.

[0176] The design with a dimension C of 0.8mm-2mm allows the impact protection device to retain sufficient deformation space at the corner 510 without significantly increasing the overall thickness of the mobile terminal or interference with gripping. When the mobile terminal is dropped and first contacts the ground at the corner 510, the outer second surface 120 will initially bear the impact load and undergo compressive deformation. The load is then transferred along the internal material of the body 100 to the first surface 110. Simultaneously, the contact relationship between the first surface 110 and the mid-frame 500 disperses some of the impact to the adjacent sidewall area, thereby reducing the instantaneous peak stress acting on the corner 510 body of the mid-frame 500. The impact protection device can provide a relatively balanced contact buffer for different drop postures, avoiding localized hard-hit contact at the corner 510 due to geometric changes.

[0177] In this embodiment, the mobile terminal can extend the impact time, reduce the impact peak and alleviate stress concentration by utilizing the directional outward convexity and elastic compression characteristics of the main body 100 without relying on an external protective cover. This helps to improve the impact resistance and structural reliability of the corner 510 of the mobile terminal frame 500, while also taking into account the overall appearance consistency and assembly compatibility.

[0178] For example, the dimension C can be 0.8mm, 0.9mm, 1mm, 1.1mm, 1.15mm, 1.2mm, 1.21mm, 1.23mm, 1.25mm, 1.27mm, 1.3mm, 1.5mm or 2mm, etc. Of course, the embodiments of this application do not limit this, and can be reasonably selected within the above range.

[0179] It should be noted that when the dimension C is close to 0.8mm, it is more conducive to maintaining the overall slim and lightweight shape of the mobile terminal, while when the dimension C is close to 2mm, it can provide a more significant cushioning thickness. When the dimension C is too large (for example, greater than 2mm), it is not conducive to the compactness of the mobile terminal structure, affecting the slim and lightweight design requirements of the mobile terminal; when the dimension C is too small (for example, less than 0.8mm), it is easy to cause the problem of weak drop protection capability of the mobile terminal.

[0180] For example, the protrusion of the second surface 120 can also be achieved by a structure such as a continuous protrusion, a segmented flange or a multi-level step, and the contact relationship between the first surface 110 and the middle frame 500 can be set as surface contact, line contact or point contact, etc., according to specific assembly requirements.

[0181] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 13As shown, in some embodiments, the impact protection device includes a connecting structure, which includes a first protrusion 310 that protrudes from the first surface 110 toward a side away from the second surface 120; the middle frame 500 has a socket 501 through which the first protrusion 310 is inserted. Thus, through the insertion and engagement of the connecting structure and the socket 501 of the middle frame 500, at least preliminary coarse positioning of the impact protection device on the middle frame 500 can be achieved, helping to improve the assembly efficiency and accuracy of the assembly position of the middle frame 500 and the impact protection device.

[0182] Furthermore, the fit between the first protrusion 310 and the socket 501 helps to constrain the displacement of the impact protection device relative to the middle frame 500, making it less likely for local slippage and detachment to occur when the impact load is transmitted to the middle frame 500 via the body part 100. At the same time, the first protrusion 310 itself can withstand part of the shear force, pull-out force and rotational torque within the socket 501, and absorbs and disperses the impact energy by undergoing slight deformation through the elasticity of the material, thereby reducing the peak load of the impact directly acting on the corner 510 of the middle frame 500 and its adjacent structure.

[0183] This connection structure and the corresponding socket 501 not only improve the assembly stability between the impact protection device and the middle frame 500, but also enhance the retention capability of the protective component under impact conditions, so that the corner protection 510 is transformed from a simple surface covering to a connection protection method with mechanical limiting and force transmission capabilities, thereby improving the overall impact resistance performance of the mobile terminal in scenarios such as drops and bumps.

[0184] For example, the first protrusion 310 can be a cylindrical column to facilitate mating with the circular hole-shaped socket 501 and obtain a more uniform insertion force; or, the first protrusion 310 can be made into a rectangular tongue or a flat tongue to adapt to a rectangular slot or a side-opening slot and enhance anti-rotation constraint; or, the first protrusion 310 can be made into a frustum-shaped guide head or a barbed rib structure to achieve automatic guidance during insertion and form a stronger locking effect after insertion.

[0185] For example, the first protrusion 310 may also be a multi-stage stepped connector, with the first protrusion 310 having a larger cross section at the end near the body portion 100 and a smaller cross section at the end away from the body portion 100, so as to balance insertion smoothness and assembly retention force.

[0186] For example, the first protrusion 310 can be integrally molded with the body portion 100, for example, by integral molding using TPU, thermoplastic elastomer, silicone or elastic composite material, to ensure that it has sufficient elastic recovery capability when repeatedly assembled and subjected to impact.

[0187] For example, the area where the socket 501 of the middle frame 500 is located can be formed by directly opening a hole in the middle frame 500; when the middle frame 500 is made of metal, the socket 501 can be formed on the middle frame 500 by means of stamping, laser cutting, milling, etc., and plastic inserts can also be embedded in the socket 501 to improve the mating fit and wear resistance.

[0188] For example, the outer diameter, outer width, or diagonal dimension of the first protrusion 310 can form a clearance fit, a slight interference fit, or a partial interference fit with the dimension of the socket 501.

[0189] For example, if the first protrusion 310 is made of a softer elastic material, the insertion force can be reduced by setting an inlet chamfer, rounded transition or local diameter reduction section, and springback locking can be generated after insertion.

[0190] It should be understood that the distance between the upper first protrusion 310 and the socket 501 can be adjusted according to the material of the middle frame 500, the processing precision, and the overall assembly tolerance. Any structural form that can achieve the functions of connection, limiting, and holding can be adopted.

[0191] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 13 As shown, in some embodiments, the mobile terminal further includes a locking structure 600, and the peripheral wall of the first protrusion 310 is provided with an annular groove 311 surrounding itself. The locking structure 600 cooperates with the annular groove 311 and restricts a portion of the first protrusion 310 to the side of the insertion port 501 facing away from the first surface 110. In other words, the locking structure 600 is used to further prevent the first protrusion 310 from retracting in the insertion direction after it is inserted into the middle frame 500 through the insertion port 501. Thus, by cooperating with the locking structure 600 and the annular groove 311, the impact protection device can be prevented from coming loose from the corner 510 of the middle frame 500 when dropped, vibrated, or pulled by external force.

[0192] By engaging the locking structure 600 with the annular groove 311, the first protrusion 310 cannot easily disengage from the socket 501 axially when the impact protection device is subjected to an impact, thus stably maintaining the connection between the impact protection device and the corner 510 of the middle frame 500. Therefore, when the mobile terminal suffers a drop or lateral impact, the main body 100 and its buffer structure 200 can remain in a predetermined position to participate in force absorption and impact dispersion without reducing the protective effect due to loosening of the connection. This improves the assembly stability, vibration resistance, and long-term reliability of the corner 510 protection device.

[0193] For example, the annular groove 311 may be formed in the middle of the outer peripheral wall of the first protrusion 310, near the root or near the end, so as to provide a stable insertion, holding or covering position for the locking structure 600 after the first protrusion 310 enters the socket 501.

[0194] For example, the locking structure 600 can take the form of an elastic claw, a retaining ring, a limiting shoulder, a metal spring, a flange formed on the inner wall of the middle frame 500, or a colloidal anti-retraction part, etc. The elastic claw can undergo radial elastic deformation during assembly and embed into the annular groove 311 after resetting. The retaining ring can form a circumferential clamp around the outer periphery of the first protrusion 310. The limiting shoulder can prevent the first protrusion 310 from axially exiting through the stepped surface on the rear side of the insertion port 501.

[0195] For example, the dimensional relationship between the first protrusion 310 and the locking structure 600 can be set to a slightly interference fit or an elastic press fit that fits each other. The groove width and groove depth of the annular groove 311 and the protrusion of the locking structure 600 are adapted to the outer diameter of the first protrusion 310 to ensure that reliable locking can be achieved after assembly, without causing assembly difficulties or excessive local stress due to excessive tightness.

[0196] For example, the annular groove 311 can be a continuous circumferential annular groove, a partially open annular groove, a stepped groove, or an inverted recessed groove, and the locking structure 600 can be integrally formed from the body of the middle frame 500. The locking structure 600 can also be composed of independent fasteners, inserts, or elastic accessories; or, the locking structure 600 can be formed by curing an adhesive (such as hot melt adhesive).

[0197] For example, the first protrusion 310 and the annular groove 311 can be made of materials such as TPU, TPE, silicone, or elastic plastic. The locking structure 600 can be made of materials such as metal, rigid plastic, elastic colloid, or composite material to balance assembly strength and limiting rebound performance. Alternatively, the locking structure 600 can be made of a curable adhesive such as hot melt adhesive.

[0198] For example, the groove depth of the annular groove 311 can be adapted to the outer diameter of the first protrusion 310 and the wall thickness of the socket 501, so that only a local recess sufficient to accommodate the locking part is usually formed while ensuring the reliability of locking.

[0199] For example, the extension length of the first protrusion 310 can be set to match the thickness of the socket 501 and the holding stroke of the locking structure 600, so that after full insertion, a portion of it remains on the side of the socket 501 facing away from the first surface 110 and is blocked or supported by the locking structure 600.

[0200] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8, Figure 9 and Figure 13 As shown, in some embodiments, the inner side of the middle frame 500 is provided with a glue groove 530, the glue groove 530 is recessed toward the first surface 110 and opposite to the socket 501, the annular groove 311 is located in the glue groove 530, and the glue groove 530 is provided with adhesive that is respectively bonded to the first protrusion 310 and the middle frame 500, and the adhesive constitutes a locking structure 600.

[0201] This helps improve the pull-out resistance and long-term service stability of the connection structure, and ensures that the impact protection device remains reliably positioned when the mobile terminal is dropped or collided, thus helping to maintain the continuous effectiveness of the corner protection function.

[0202] The adhesive groove 530 constrains the shape of the adhesive. After curing, the adhesive not only fills gaps and seals against dust and moisture, but also axially locks the first protrusion 310 by circumferentially covering it, making it less likely to come out of the socket 501 under external pulling force, vibration load, or impact load. Simultaneously, the adhesion between the adhesive and the middle frame 500 transforms the load from local point contact to surface contact or circumferential contact, reducing stress concentration and minimizing wear, loosening, or fatigue damage to the connection point caused by repeated stress. Furthermore, the adhesive groove 530 can also accommodate and conceal the end of the first protrusion 310 away from the main body 100, helping to reduce the impact protection device's occupation of the space inside the middle frame 500 of the mobile terminal, thus leaving sufficient space for the assembly of electronic components inside the middle frame.

[0203] For example, the shape of the glue groove 530 can be set according to the material and processing technology of the middle frame 500.

[0204] For example, the glue groove 530 can be an annular groove, a semi-annular groove, a strip groove, a partially stepped cavity, or a dot matrix cavity.

[0205] The middle frame 500 can be made of plastic, metal or composite material, and the glue groove 530 can be formed by injection molding, milling, stamping or secondary grooving.

[0206] For example, the colloid can be a hot melt adhesive, UV (Ultraviolet) adhesive, epoxy adhesive, silicone colloid, or modified elastic adhesive. After curing, it can present a flexible, semi-rigid, or high-modulus locking body to adapt to different assembly precision and impact resistance requirements.

[0207] For example, the depth and width of the glue tank 530 can be set to accommodate a sufficient amount of glue and prevent glue overflow from interfering with the socket 501.

[0208] For example, the filling thickness of the colloid in the colloid groove 530 can be set to match the outward extension dimension of the first protrusion 310 to achieve full coverage without affecting the insertion positioning; the radial dimension of the annular groove 311 can be set to match the surrounding area formed by the colloid to ensure that the colloid can uniformly transmit the load when subjected to circumferential force.

[0209] Reference Figure 1 , Figure 3 , Figure 5 and Figure 8 As shown, in some embodiments, the body portion 100 has a first surface 110 facing the corner 510 and a second surface 120 facing away from the corner 510. The impact protection device also includes a foolproof groove 410, which is recessed into the first surface 110 towards the second surface 120. The middle frame 500 has a foolproof protrusion 540 that engages with the foolproof groove 410.

[0210] Thus, during the assembly of the impact protection device onto the mid-frame 500, the anti-misalignment protrusion 540 gradually enters the anti-misalignment groove 410 and corrects the posture of the main body 100, ensuring that the first surface 110 of the main body 100 stably faces the corner 510 and the second surface 120 stably faces away from the corner 510 and is close to the corresponding part of the mid-frame 500. In this way, this anti-misalignment structure not only prevents incorrect assembly but also improves the fitting accuracy between the protection device and the corner 510 of the mid-frame 500, reducing the risk of protection failure due to installation errors and helping to maintain the stability and consistency of the overall mobile terminal structure.

[0211] When the impact protection device is assembled relative to the middle frame 500, the anti-fooling protrusion 540 and the anti-fooling groove 410 form a limiting relationship, which constrains the lateral movement, angular offset and axial misalignment of the main body 100, thereby preventing the impact protection device from failing to be fully in place due to incorrect orientation during the assembly process, or from weakening its coverage of the corner 510 due to positional deviation.

[0212] Because the foolproof structure can achieve guidance recognition in the early stage of assembly, the main body 100 can stably fit with the corner 510 of the middle frame 500 in the correct orientation, and work together with the subsequent connection structure, locking structure 600 or bonding structure to ensure the installation reliability and repeated assembly consistency of the impact protection device during use.

[0213] When a mobile terminal is dropped or collided, the correctly positioned impact protection device can maintain a predetermined force-bearing posture, so that the impact load first acts on the main body 100 and is absorbed and dispersed through its buffer structure 200. The positioning fit provided by the anti-fooling groove 410 and the anti-fooling protrusion 540 can prevent the protection device from being partially suspended, having a force offset or stress concentration due to assembly deviation, thereby making the impact transmission path more stable and improving the impact resistance and long-term reliability of the corner 510 area of ​​the middle frame 500.

[0214] For example, the anti-fooling groove 410 can take different forms such as rectangular groove, arc-shaped recess, triangular positioning groove, irregular notch or stepped positioning hole to adapt to different middle frame 500 structures and assembly tolerance requirements.

[0215] For example, the opening end of the foolproof groove 410 may have an inlet ramp and a limiting surface at the bottom of the groove to gradually guide and terminate positioning during insertion.

[0216] For example, the material of the groove wall of the anti-fooling groove 410 can be the same as that of the body part 100. The material can be TPU, silicone, thermoplastic elastomer, or a polymer material with a certain degree of flexibility, so as to ensure positioning reliability while avoiding assembly difficulties or local stress concentration due to excessive rigidity. Alternatively, the anti-fooling groove 410 can also be formed in the body part 100 by partial insert molding or overmolding.

[0217] For example, the anti-fooling protrusion 540 may be integrally formed from the body of the middle frame 500, or it may be composed of an insert, an add-on, or a local reinforcement structure.

[0218] For example, the shape of the anti-fooling protrusion 540 can be a columnar boss, an arc-shaped protrusion, a rectangular key, a wedge-shaped guide rib, or a chamfered positioning rib, so as to form an insertable fit with the anti-fooling groove 410.

[0219] For example, the depth and width of the anti-mistake groove 410 and the height and thickness of the anti-mistake protrusion 540 can be set according to the available space and assembly tolerance of the corner 510 of the middle frame 500, and can be set to micro interference, clearance guide or transition fit.

[0220] Reference Figure 1 , Figure 3 , Figure 8 , Figure 11 and Figure 12As shown, in some embodiments, the body portion 100 has a first surface 110 facing the corner 510 and a second surface 120 facing away from the corner 510. The impact protection device also includes a plurality of protrusions 320, which protrude from the first surface 110 away from the second surface 120. The protrusions 320 are supported on the middle frame 500 and support an adhesive space 700 between the first surface 110 and the middle frame 500. The adhesive space 700 contains adhesive, which is connected to the first surface 110 and the middle frame 500 respectively.

[0221] Thus, this structure, on the one hand, improves the effective filling and coverage range of the adhesive through the adhesive space 700, enhancing the bonding stability between the main body 100 and the middle frame 500. On the other hand, the support skeleton formed by the protrusions 320 improves the force distribution, enabling the impact protection device to maintain its position and continuously play a buffering and protective role when dropped or bumped. This is beneficial to improving the impact resistance, assembly reliability and long-term use stability of the corner 510 area of ​​the mobile terminal middle frame 500.

[0222] When the impact protection device is assembled to the middle frame 500, it can be assembled through the corner 510 area of ​​the body 100 and the middle frame 500. Several protrusions 320 first contact the middle frame 500 and limit the distance between the first surface 110 and the middle frame 500 to a preset gap. Then, the adhesive enters the formed adhesive space 700 under pressure, capillary action or dispensing diffusion, and after curing, it adheres to the first surface 110 and the middle frame 500 at the same time, thereby reliably fixing the body 100 at the corner 510 position.

[0223] Because the adhesive is divided into multiple local adhesive layers or continuous adhesive cavities by the protrusions 320, the adhesive can share the local deformation with the protrusions 320 when subjected to external impact, avoiding large-area peeling or shear failure of the adhesive layer on a single plane; at the same time, the discrete support provided by the protrusions 320 allows the impact load to be transmitted to the middle frame 500 along multiple support paths, reducing the stress concentration at the corner 510.

[0224] For example, the protrusions 320 can be arranged in the area of ​​the first surface 110 that is in contact with the middle frame 500. A plurality of protrusions 320 can be distributed in a dot matrix, a surrounding, or a strip pattern along both sides of the corner 510.

[0225] For example, the protrusion 320 can be one or more of the following shapes: hemispherical small protrusion, cylindrical support, frustum-shaped support, strip rib, or honeycomb support unit. The material of the protrusion 320 can be integrally formed with the body 100, and can be made of TPU, thermoplastic elastomer, silicone, rubber elastomer or composite material thereof; it can also be formed by partial secondary molding, overmolding or injection molding inserts.

[0226] The middle frame 500 can be made of materials such as metal, plastic or rubber; the surface of the middle frame 500 can be treated by anodizing, spraying or micro-arc oxidation.

[0227] For example, the adhesive may be a hot melt adhesive, a PUR (Polyurethane Reactive) adhesive, a UV adhesive, a two-component adhesive, a dispensing resin, or a hot melt potting compound.

[0228] For example, the spacing, number, and distribution density of the bumps 320 can be set according to the size of the protective device, the amount of adhesive, and the load-bearing requirements. For instance, the distance between adjacent bumps 320 can be sufficient to form a continuous adhesive flow channel, thereby facilitating the uniform entry of the adhesive into and covering the contact area between the first surface 110 and the middle frame 500.

[0229] Reference Figure 5 , Figure 8 , Figure 11 and Figure 12 As shown, in some embodiments, the middle frame 500 has an inwardly recessed connecting portion 550, and a portion of the body portion 100 is embedded in the connecting portion 550.

[0230] Thus, firstly, the cooperation between the connecting part 550 and the main body 100 facilitates the positioning and installation of the middle frame 500 and the connecting part 550, which helps to improve the assembly accuracy of the impact protection device on the middle frame 500.

[0231] Secondly, when the mobile terminal is subjected to a drop or collision, the impact protection device located at the corner 510 of the middle frame 500 first comes into contact with the contact surface. The part of its body 100 exposed outside the middle frame 500 bears the initial impact and generates elastic deformation. The impact energy is then transmitted to the periphery of the connecting part 550 of the middle frame 500 through the inner section of the body 100 embedded in the connecting part 550.

[0232] Because the connecting part 550 forms an embedded enclosure and limiting constraint on the main body 100, the main body 100 can not only obtain a more stable installation base, but also distribute part of the lateral load to the larger area of ​​the middle frame 500 structure around the connecting part 550 when under stress, thus avoiding the impact being concentrated at a single edge position.

[0233] Thirdly, the contact surface between the part of the main body 100 embedded in the connecting part 550 and the connecting part 550 increases the friction and bonding area, making it less likely for the impact protection device to fall off, shift or flip up during repeated impacts or long-term use, thereby maintaining the continuity of the protection contour at the corner 510.

[0234] In summary, the structure of the mobile terminal provided in this embodiment can achieve more reliable positioning, more sufficient impact absorption, and more effective force distribution by means of the embedded cooperation between the connecting part 550 and the main body 100 without relying on an external protective cover. This reduces the stress peak at the corner 510 of the middle frame 500, reduces the impact transmission to the edge of the screen 800 and internal components, and improves the structural reliability and protective stability of the mobile terminal in scenarios such as drops and bumps.

[0235] For example, the corner 510 area of ​​the connecting part 550 and the middle frame 500 can be integrally formed or the connecting part 550 can be formed by post-processing.

[0236] For example, the connecting portion 550 may extend a short distance along the length direction, width direction, or a combination of both of the middle frame 500 so as to fit against the embedded portion of the body portion 100.

[0237] For example, the connecting part 550 can be an arc-shaped cavity, a rectangular groove, a stepped countersunk platform, an annular concave area, or a pocket-shaped recess, etc.

[0238] For example, the middle frame 500 can be formed by CNC (Computer Numerical Control) processing, stamping and bending of metal materials, or by plastic injection molding, magnesium-aluminum alloy die casting, or composite material overmolding to obtain the connecting part 550.

[0239] The main body 100 can be made of TPU, silicone, thermoplastic elastomer, elastic rubber or composite cushioning material with a reinforcing layer to balance cushioning rebound and assembly durability.

[0240] For example, the recess depth, width and opening size of the connecting portion 550 can be designed to match the shape of the embedded section of the body portion 100.

[0241] Reference Figures 11 to 13 As shown, in some embodiments, the edge of the body portion 100 and the edge of the middle frame 500 located at the connecting portion 550 interfere with each other, and the interference amount is 0.02mm-0.5mm. Thus, this edge interference design helps to improve the assembly stability, impact resistance, and overall fit consistency between the impact protection device and the middle frame 500 without significantly increasing the overall size of the device, thereby enhancing the protective reliability of the corner 510 area of ​​the mobile terminal.

[0242] When assembling the impact protection device into the middle frame 500, the edge of the main body 100 first contacts the edge of the middle frame 500 located at the connecting part 550 under the pressure action and produces elastic deformation. As the assembly depth increases, the interference relationship between the edges is gradually established until the main body 100 springs back and forms a continuous pressing state around the connecting part 550.

[0243] Because the slight interference fit continuously provides normal preload, the impact protection device can maintain a high degree of fit and positioning accuracy under vibration, temperature changes and external disturbances during daily use, and is not prone to displacement, warping or loosening. At the same time, when the mobile terminal is dropped or laterally impacted, the friction damping and clamping constraint between the edges can work together with the buffer structure 200 set in the body 100 to disperse the local impact and prolong the stress time, thereby reducing the degree to which the impact peak is transmitted to the corner 510 of the middle frame 500 and internal components.

[0244] For example, the interference amount can be 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm, for example, a value of 0.05mm or nearby can be selected; of course, the embodiments of this application do not limit this, and can be reasonably selected within the above range according to needs.

[0245] It should be noted that when the interference amount is small (e.g., less than 0.02 mm), the normal preload it provides is not significant enough; when the interference amount is large (e.g., greater than 0.5 mm), it is not conducive to a tight connection between the main body 100 and the middle frame 500, and may even affect the stability of the connection between the first surface 110 and the corresponding position of the middle frame 500.

[0246] For example, the edge of the body portion 100 may be provided with a flange 130, and the edge of the body portion 100 may interfere with the edge of the middle frame 500 located at the connecting portion 550 through the flange 130.

[0247] For example, the edge of the body part 100 can be set as a straight edge, a rounded edge, a chamfered edge, a stepped edge, or a flexible edge; the material of the edge of the body part 100 can be TPU, silicone, thermoplastic elastomer, elastic polyurethane, or soft coating material; the part where the edge of the middle frame 500 and the connecting part 550 meet can be an aluminum alloy edge, a magnesium alloy edge, a stainless steel edge, an engineering plastic edge, or a composite edge with an anodized layer, a sprayed layer, or a PVD (Physical Vapor Deposition) layer on the surface.

[0248] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An impact protection device for protecting the corner (510) of the mid-frame (500) of a mobile terminal, characterized in that, The impact protection device includes: The main body (100) is adapted to be disposed at the corner (510) of the middle frame (500) and connected to the middle frame (500), and the main body (100) is used to protrude from the sidewalls (520) of the middle frame on both sides of the corner (510). A buffer structure (200) is provided on the main body (100).

2. The impact protection device according to claim 1, characterized in that, The main body (100) has a first surface (110) facing the corner (510) and a second surface (120) facing away from the corner (510). The first surface (110) is used to connect with the middle frame (500), and the second surface (120) is used to protrude from the middle frame sidewalls (520) on both sides of the corner (510). The buffer structure (200) is disposed between the first surface (110) and the second surface (120).

3. The impact protection device according to claim 2, characterized in that, The buffer structure (200) includes a buffer cavity (201).

4. The impact protection device according to claim 3, characterized in that, The buffer cavity (201) extends through the body (100) along the thickness direction of the mobile terminal.

5. The impact protection device according to claim 3, characterized in that, The wall thickness of the main body (100) on the side of the buffer cavity (201) facing away from the first surface (110) is 1mm-2mm.

6. The impact protection device according to any one of claims 1-5, characterized in that, The body part (100) includes an elastic material.

7. The impact protection device according to claim 2, characterized in that, Also includes: A connecting structure is provided on the first surface (110), and the main body (100) is connected to the middle frame (500) through the connecting structure.

8. The impact protection device according to claim 7, characterized in that, The connection structure includes a first protrusion (310) that protrudes from the first surface (110) toward a side away from the second surface (120) and is adapted to engage with the middle frame (500).

9. The impact protection device according to claim 8, characterized in that, There are two first protrusions (310); one of the two first protrusions (310) extends along a first direction, and the other extends along a second direction; wherein the first direction is parallel to the length direction of the mobile terminal, and the second direction is parallel to the width direction of the mobile terminal; and / or, The first protrusion (310) has an annular groove (311) around its periphery, which is used to prevent the first protrusion (310) from falling off the middle frame (500).

10. The impact protection device according to claim 8, characterized in that, The first surface (110) includes a first region (111) and a second region (112), wherein the first region (111) protrudes relative to the second region (112) in a direction away from the second surface (120); The first protrusion (310) is located in the second region (112).

11. The impact protection device according to claim 2, characterized in that, Also includes: A foolproof structure is provided on the first surface (110).

12. The impact protection device according to claim 11, characterized in that, The anti-mistake structure includes an anti-mistake groove (410) that is recessed toward the second surface (120) and is anti-mistake-fitted with the middle frame (500).

13. The impact protection device according to claim 2, characterized in that, The impact protection device includes a connecting structure, which includes a plurality of protrusions (320), the protrusions (320) protruding from the first surface (110) in a direction away from the second surface (120); The first surface (110) is used for adhesive bonding with the middle frame (500).

14. The impact protection device according to claim 13, characterized in that, The protrusion (320) protrudes 0.1mm-0.2mm relative to the first surface (110).

15. A mobile terminal, characterized in that, include: Mid-frame (500); The impact protection device according to any one of claims 1-14, wherein the impact protection device is connected to the corner (510) of the middle frame (500).

16. The mobile terminal according to claim 15, characterized in that, The body portion (100) has a first surface (110) facing the corner (510) and a second surface (120) facing away from the corner (510), the second surface (120) protruding from the side wall (520) of the middle frame by a distance of 0.8mm-2mm along a first direction and / or a second direction; wherein, the first direction is parallel to the length direction of the mobile terminal and the second direction is parallel to the width direction of the mobile terminal.

17. The mobile terminal according to claim 16, characterized in that, The impact protection device includes a connecting structure, the connecting structure including a first protrusion (310) protruding from the first surface (110) toward a side away from the second surface (120); the middle frame (500) has a socket (501) through which the first protrusion (310) is inserted into the middle frame (500).

18. The mobile terminal according to claim 17, characterized in that, It also includes a locking structure (600), wherein the peripheral wall of the first protrusion (310) is provided with an annular groove (311) surrounding itself, the locking structure (600) cooperates with the annular groove (311) and restricts a portion of the first protrusion (310) to the side of the socket (501) facing away from the first surface (110).

19. The mobile terminal according to claim 18, characterized in that, The inner side of the middle frame (500) is provided with a glue groove (530), the glue groove (530) is recessed towards the first surface (110) and opposite to the socket (501), the annular groove (311) is located in the glue groove (530), the glue groove (530) is provided with adhesive that is respectively bonded to the first protrusion (310) and the middle frame (500), and the adhesive constitutes the locking structure (600).

20. The mobile terminal according to claim 15, characterized in that, The main body (100) has a first surface (110) facing the corner (510) and a second surface (120) facing away from the corner (510). The impact protection device also includes a foolproof groove (410) that is recessed into the first surface (110) facing the second surface (120). The middle frame (500) has a foolproof protrusion (540) that engages with the foolproof groove (410).

21. The mobile terminal according to claim 15, characterized in that, The main body (100) has a first surface (110) facing the corner (510) and a second surface (120) facing away from the corner (510). The impact protection device also includes a plurality of protrusions (320) that protrude from the first surface (110) away from the second surface (120). The protrusion (320) is supported on the middle frame (500) and provides an adhesive space (700) between the first surface (110) and the middle frame (500). The adhesive space (700) contains adhesive and is connected to the first surface (110) and the middle frame (500) respectively.

22. The mobile terminal according to claim 15, characterized in that, The middle frame (500) has an inwardly recessed connecting portion (550), and a portion of the body portion (100) is embedded in the connecting portion (550).

23. The mobile terminal according to claim 22, characterized in that, The edge of the main body (100) and the edge of the middle frame (500) located at the connecting part (550) interfere with each other, and the interference amount is 0.02mm-0.5mm.

Images