Mobile device protective case and inner frame thereof

Abstract

The present invention discloses a protective case for a mobile device, adapted to cooperate with a mobile device. The protective case includes an inner frame and an outer frame. The inner frame has a body and at least one support portion, the support portion being connected to an outer circumferential surface of the body, and the support portion having a collapsible space. The outer frame is connected to the inner frame by a joining means, and the outer frame has a frame body, the inner circumferential surface of which is spaced apart from the outer circumferential surface of the body to form an air chamber. The present invention also discloses the inner frame of the mobile device protective case.

Description

[Technical Field]

[0001] This invention relates to a peripheral accessory for a mobile device, and more particularly to a protective case for a mobile device and its inner frame. [Previous Technology]

[0002] With the increasing frequency of mobile device use by modern people, a wide variety of protective cases are available on the market to prevent damage or malfunction caused by accidental drops. These cases are designed for mobile devices such as smartphones, tablets, e-readers, personal digital assistants, smartwatches, and wireless charging cases for earphones. Many of these cases have airbags in the corners to absorb the impact of a fall. [Summary of the Invention]

[0003] However, these conventional protective sleeves lack proper support structures at the airbag and are too weak in rigidity. When subjected to impact force, the airbag often undergoes excessive deformation, causing the outer wall of the airbag to contact the inner wall, resulting in a large amount of impact force still being transmitted to the moving device. Therefore, the effect of drop protection is not ideal.

[0004] In view of the shortcomings of the above-mentioned prior art, the inventor felt that it was not perfect, so he devoted his mind to research and overcoming it, and then developed a protective shell for mobile devices. The corners of the shell form a shock-absorbing structure, which can effectively disperse and absorb impact force and improve the protection effect of mobile devices from falls.

[0005] In addition, the present invention provides an inner frame that can be used in conjunction with an outer frame to form the above-mentioned protective shell for the mobile device.

[0006] The use of the quantifiers “a” or “an” for the elements and components described throughout this invention is for convenience and to provide the general meaning of the scope of the invention; in this invention, it should be interpreted as including one or at least one, and the single concept also includes the plural case, unless it clearly means otherwise.

[0007] The terms "combination", "integration" or "assembly" used throughout this invention mainly include those that can be separated without damaging the components after connection, or those that make the components inseparable after connection. These are terms that can be selected by those with ordinary knowledge in the art based on the material of the components to be connected or the assembly requirements.

[0008] To achieve the above and other objectives, the present invention provides a protective shell for a mobile device, comprising an inner frame and an outer frame. The inner frame has a body and at least one support portion, the support portion being connected to an outer circumferential surface of the body, and the support portion having a collapsible space. The outer frame is connected to the inner frame by a joining means, the outer frame having a frame body, an inner circumferential surface of the frame body being spaced apart from the outer circumferential surface of the body to form an air chamber.

[0009] The present invention further provides a protective shell for a mobile device, comprising an inner frame and an outer frame. The inner frame has a body and a plurality of support portions, the plurality of support portions being connected to an outer circumferential surface of the body. The outer frame is connected to the inner frame by a joining means, the outer frame having a frame body, an inner circumferential surface of the frame body being spaced apart from the outer circumferential surface of the body to form an air chamber.

[0010] In the above-mentioned protective case for mobile devices, the light transmittance of the outer frame can be greater than that of the inner frame.

[0011] In the above-mentioned protective case for the mobile device, the light transmittance of the inner frame is approximately 0-40%.

[0012] In the above-mentioned protective shell for the mobile device, the inner frame may have several protrusions, which are connected to the outer ring surface of the body and are respectively located on two sides of the body in the horizontal direction. The several protrusions are engaged with the frame.

[0013] In the above-mentioned protective shell of the mobile device, a portion of the air chamber can be filled by the protrusion to form several airtight buffer airbags in the air chamber.

[0014] In the above-mentioned protective case for the mobile device, the inner frame may have several buttons, which are located on at least one side of the body in the horizontal direction, and the extent by which each protrusion protrudes from the body is greater than the extent by which the button protrudes from the body.

[0015] In the above-mentioned protective case for mobile devices, the support portion, protrusion and button of the inner frame can be integrally formed and connected to the main body.

[0016] In the above-mentioned protective case for the mobile device, none of the buttons are connected to the outer frame, and each button is spaced apart from the inner circumferential surface of the frame and does not contact it.

[0017] In the above-mentioned protective case for mobile devices, the thickness of the frame at the location of the buttons can be relatively thin.

[0018] In the above-mentioned protective case for the mobile device, the outer peripheral surface of the frame may have several rough portions, which are respectively located on the several buttons.

[0019] In the above-mentioned protective shell for the mobile device, the height of the rough portion protruding from the outer peripheral surface of the frame is approximately 0.15 mm.

[0020] In the above-mentioned protective case for mobile devices, the frame may have at least one recessed area for the plurality of buttons, in which the front and rear side edges of the frame are relatively thin.

[0021] In the above-mentioned protective case for the mobile device, the inner frame may have at least one skirt, which airtightly connects the button and the body.

[0022] In the above-mentioned protective shell for the mobile device, the joining means can be welding.

[0023] In the above-mentioned protective shell of the mobile device, the frame may have several protrusions, each of which protrudes from the inner circumferential surface of the frame, and the free end of each of the protrusions forms at least one abutting surface, which can interfere with the outer ring surface of the body.

[0024] In the above-mentioned protective shell for the mobile device, the interference between the contact surface and the outer ring surface of the body is approximately 0.1 to 0.3 mm.

[0025] In the above-mentioned protective shell for the mobile device, the free end of the support part can interfere with the inner circumferential surface of the frame.

[0026] In the above-mentioned protective shell for the mobile device, the interference between the free end of the support and the inner circumferential surface of the frame is approximately 0.4 to 1 mm.

[0027] In the above-mentioned protective shell for the mobile device, the free end of the support portion abutting against the inner circumferential surface of the frame is not subjected to the joining means.

[0028] In the above-mentioned protective shell for the mobile device, the body of the inner frame has an inner annular surface, which encloses and defines a chamber suitable for accommodating a mobile device. The mobile device has two opposite long sides and two opposite short sides. Any two adjacent long sides and short sides extend and intersect at an intersection point. The line passing through the center of mass of the mobile device and any of the aforementioned intersection points is the center line. The support part can be located at the corner of the body. The middle position of the support part can be located between the two center lines and closer to the two sides of the inner frame in the longitudinal direction.

[0029] In the above-mentioned protective shell of the mobile device, the two cycloids pass through the center of mass and form a 20-degree angle with the center of mass line respectively. The two extension lines are orthogonal to the two cycloids and are tangent to the outer peripheral surface of the frame at two tangent points. Both tangent points are located within the range of the support portion projected onto the outer peripheral surface.

[0030] In the above-mentioned protective shell of the mobile device, the two tangent points are respectively projected onto the outer peripheral surface of the free end located on the support.

[0031] In the above-mentioned protective shell for the mobile device, there may be several support parts, which are located at various corners of the main body.

[0032] In the above-mentioned protective shell of the mobile device, the support portion may have a long end edge and a short end edge, the support portion is connected to the outer ring surface of the body by the long end edge, and the short end edge is located at the free end of the support portion.

[0033] In the above-mentioned protective shell for the mobile device, the long end edge of the support portion has a first span, and the short end edge of the support portion has a second span, the ratio of the first span to the second span is approximately 3:2.

[0034] In the above-mentioned protective shell for the mobile device, the collapse space can be several holes provided in the support portion.

[0035] In the above-mentioned protective shell of the mobile device, the number of holes can be three, one of which is closer to the free end of the support and the other two holes are farther away from the free end of the support.

[0036] In the above-mentioned protective shell of the mobile device, each hole has a maximum hole groove width, and each hole may have a solid material area around it. The edge of the solid material area is spaced from the edge of the hole to the hole edge. The ratio of the spaced distance to the maximum hole groove width is approximately 0.62 to 0.93.

[0037] In the above-mentioned protective shell for the mobile device, the maximum width of the hole is approximately 1 to 1.5 mm.

[0038] In the above-mentioned protective shell for the mobile device, the hole can be an elongated hole with arc-shaped ends.

[0039] In the above-mentioned protective shell of the mobile device, the collapse space can be a number of slots provided on the support portion, each of which extends from the free end of the support portion to the body.

[0040] In the above-mentioned protective shell for the mobile device, the radius of curvature at the corner of the frame can be smaller than the radius of curvature at the corner of the main body.

[0041] In the above-mentioned protective shell for the mobile device, the maximum distance between the corner of the frame and the corner of the main body is about 4 mm or more.

[0042] In the above-mentioned protective shell for the mobile device, both the inner frame and the outer frame can be made of thermoplastic elastomer (TPE) material.

[0043] In the above-mentioned protective shell for the mobile device, the outer frame may have a back plate, and the lower part of the inner surface of the back plate may have a thin area, and the thickness of the back plate in the thin area is relatively thin.

[0044] In the above-mentioned protective shell of the mobile device, the air chamber may contain several cushioning particles or at least one decorative piece.

[0045] Furthermore, the inner frame of the mobile device protective shell of the present invention includes a body and at least one support portion. The body has an inner annular surface and an outer annular surface, and the inner annular surface surrounds a chamber suitable for accommodating a mobile device. The support portion is connected to the outer annular surface of the body, and the support portion is provided with a collapsible space.

[0046] In the aforementioned inner frame, the inner frame may have several protrusions, which are connected to the outer ring surface of the body and are respectively located on two sides of the body in the lateral direction. The several protrusions are adapted to engage with the frame of an outer frame.

[0047] In the inner frame described above, a portion of the air chamber can be filled by the protrusion to form several airtight buffer airbags in the air chamber.

[0048] In the inner frame described above, the inner frame may have several buttons, which are located on at least one side of the body in the horizontal direction, and the extent by which each protrusion protrudes from the body may be greater than the extent by which the button protrudes from the body.

[0049] In the aforementioned inner frame, the support portion, protrusion, and button of the inner frame can all be integrally formed and connected to the main body.

[0050] In the aforementioned inner frame, the inner frame may have at least one skirt that airtightly connects the button to the body.

[0051] In the aforementioned inner frame, the moving device has two opposite long sides and two opposite short sides. Any two adjacent long sides and short sides extend and intersect at an intersection point. The line passing through the center of mass of the moving device and any of the aforementioned intersection points is the center of mass line. The support part can be located at the corner of the body. The middle position of the support part can be located between the two center of mass lines and is closer to the two sides of the inner frame in the longitudinal direction.

[0052] In the inner frame described above, there may be several support parts, which are located at various corners of the body.

[0053] In the inner frame described above, the support portion may have a long end edge and a short end edge, the support portion is connected to the outer ring surface of the body by the long end edge, and the short end edge is located at the free end of the support portion.

[0054] In the inner frame described above, the long end edge of the support has a first span, and the short end edge of the support has a second span, the ratio of the first span to the second span being approximately 3:2.

[0055] In the inner frame described above, the collapse space can be several holes provided in the support portion.

[0056] In the inner frame described above, there may be three holes, one of which is closer to the free end of the support and the other two are farther away from the free end of the support.

[0057] In the inner frame described above, each hole has a maximum hole groove width, and each hole may have a solid material area around it. The edge of the solid material area is spaced from the edge of the hole to the hole edge. The ratio of the spaced distance to the maximum hole groove width is approximately 0.62 to 0.93.

[0058] In the inner frame described above, the maximum slot width of the hole is approximately 1 to 1.5 mm.

[0059] In the inner frame described above, the collapse space can be a plurality of grooves provided in the support portion, each groove extending from the free end of the support portion toward the body.

[0060] Accordingly, the mobile device protective shell of the present invention can form a shock-absorbing structure at the point where it is easily subjected to drop impact, so as to provide appropriate support and buffer energy dissipation effect, effectively disperse and absorb impact force, and improve the drop protection effect of the mobile device.

Implementation Method

[0062] To fully understand the purpose, features, and effects of the present invention, the present invention will be described in detail below with reference to the following specific embodiments and accompanying drawings:

[0063] The mobile device protective case of the present invention is suitable for being fitted onto a mobile device M (shown in FIG1), which may be, for example but not limited to, a mobile phone, a tablet computer, an e-book reader, a personal digital assistant, a smartwatch, or a wireless charging case for headphones; although the following embodiments are shown as examples of mobile device protective cases for mobile phones, they are not intended to limit the present invention.

[0064] Please refer to Figures 1 and 2, which are the first embodiment of the mobile device protective case of the present invention. The mobile device protective case includes an inner frame 1 and an outer frame 2, and the outer frame 2 covers the inner frame 1.

[0065] Taking a non-folding candybar phone as an example, the mobile device M typically has a display screen M1, a side edge, and a back side. The display screen M1 is opposite to the back side, and the side edge can be connected between the display screen M1 and the back side. When the mobile device protective case is assembled onto the mobile device M, the inner frame 1 can at least surround and cover the side edge of the mobile device M. In this invention, the direction orthogonal to the plane of the display screen M1 can be defined as the Z direction, with the location of the display screen M1 being the forward direction and the location of the back side being the rear direction. The side edge of the mobile device M has two sets of opposite sides, the relative directions of one set of opposite sides being orthogonal to the relative directions of the other set of opposite sides, and the relative directions of both sets of opposite sides being orthogonal to the Z direction. In one embodiment of the present invention, one set of opposite sides consists of the two short sides M2 of the side edge, and the direction orthogonal to the two short sides M2 is defined as the Y direction; the other set of opposite sides consists of the two long sides M3 of the side edge, and the direction orthogonal to the two long sides M3 is defined as the X direction. In some embodiments, the side edge of the mobile device M does not necessarily have to have long and short sides.

[0066] Please refer to Figures 1 to 3. The inner frame 1 has a body 11 and at least one support portion 12. The body 11 has an inner ring surface 111 and an outer ring surface 112, and the inner ring surface 111 encloses and defines a chamber S1 suitable for accommodating the mobile device M. The support portion 12 is connected to the outer ring surface 112, and the support portion 12 is provided with a collapse space 13. The outer frame 2 is connected to the inner frame 1 by a joining means. The outer frame 2 has a frame body 21, which has an inner peripheral surface 211 and an outer peripheral surface 212. The inner peripheral surface 211 of the frame body 21 is spaced apart from the outer ring surface 112 of the body 11 to form an air chamber S2.

[0067] In this embodiment, when the mobile device M, which is covered by the protective shell, falls, the impact force generated upon contact with the ground will be transmitted inward through the frame 21 of the outer frame 2. If the impact point is close to the support portion 12 of the inner frame 1, most of the impact force will be applied to the support portion 12. During this process, due to the design of the support portion 12, most of the impact force can be smoothly transmitted from the free end of the support portion 12 to the body 11. During the transmission process, the energy is buffered and dissipated by the collapse space 13 on the support portion 12, and the impact force is weakened in the support portion 12. Finally, it is transmitted to both sides to the body 11 and dissipated evenly, which can effectively prevent the impact force from concentrating in one place on the mobile device M and causing damage. On the other hand, most of the remaining impact force that is not transmitted to the support part 12 can be dissipated by the support and buffering effect provided by the air chamber S2 to the frame 21. Even if the frame 21 is still deformed to the point of touching the body 11 of the inner frame 1, the impact force of that part can also be transmitted along the body 11 and dissipated evenly.

[0068] Therefore, the protective shell of the mobile device in this embodiment can form a shock-absorbing structure at the point where it is easily subjected to drop impact by the support part 12 provided in the air chamber S2 and the collapse space 13 provided in the support part 12, so as to provide appropriate support and buffer energy dissipation effect, effectively disperse and absorb impact force, and improve the drop protection effect of the mobile device M.

[0069] Please refer to Figures 2 and 3. In one embodiment of the present invention, the number of support parts 12 can be several, and they are respectively located at each corner of the body 11. For example, the cross-section of the body 11 in the XY plane of this embodiment can be generally a hollow rectangle, so the number of support parts 12 can be selected as four, and a support part 12 is provided at each of the four corners of the body 11. However, the present invention is not limited thereto. For example, in other embodiments, the support parts 12 can be provided only at the two upper corners of the body 11, or only at the two lower corners of the body 11; in other words, the position of the support parts 12 is preferably located at the corners of the body 11, but the number is not limited. The number and position of the support parts 12 can be adjusted according to the overall structural configuration or appearance considerations of the protective shell of the mobile device. The support parts 12 can even be provided at non-corner parts of the body 11 in the horizontal (X direction) or vertical (Y direction).

[0070] Referring to Figures 2 and 4, in one embodiment of the present invention, the support portion 12 may have a shape that is narrower at its free end and wider at the connection point with the body 11. For example, the support portion 12 may be trapezoidal and have a long end edge 121 and a short end edge 122, both of which may be generally arc-shaped. The support portion 12 may be connected to the outer ring surface 112 of the body 11 by the long end edge 121, while the short end edge 122 is located at the free end of the support portion 12. In the embodiment where the support portion 12 is integrally formed and connected to the body 11, the long end edge 121 is not a visible edge, and is therefore shown as a two-point chain line in Figure 4. The long edge 121 of the support portion 12 has a first span D1 (i.e., the straight-line distance between the two ends of the long edge 121), and the short edge 122 of the support portion 12 has a second span D2 (i.e., the straight-line distance between the two ends of the short edge 122). The ratio of the first span D1 to the second span D2 is approximately 3:2. Thus, during the transmission of impact force from the free end of the support portion 12 to the connection point with the main body 11, because the force-bearing area of ​​the free end of the support portion 12 is relatively small, the free end of the support portion 12 can have moderate but not excessive rigidity. Furthermore, when transmitting impact force inward, the effect of dispersing impact force can be enhanced as the cross-sectional area of ​​the support portion 12 gradually expands.

[0071] Furthermore, in one embodiment of the present invention, the radius of curvature at the corner of the frame 21 can be smaller than the radius of curvature at the corner of the body 11. This increases the distance between the two corners, thereby extending the impact force transmission path within a limited space and further enhancing the impact absorption effect of the protective shell of the mobile device. For example, but not limited to, the maximum distance between the corner of the frame 21 and the corner of the body 11 can reach 4 mm or more.

[0072] In embodiments where the inner frame 1 has a plurality of support portions 12, the collapse space 13 of each of the plurality of support portions 12 may be the same or different, and the present invention does not impose any limitation. For example, in one embodiment of the present invention, the collapse space 13 may be a plurality of holes 13a provided in the support portion 12, and preferably through holes. The number of holes 13a provided in each of the plurality of support portions 12 may also be the same or different.

[0073] Each hole 13a can substantially penetrate the support portion 12 along the Z direction, and the extending directions of the plurality of holes 13a provided in the same support portion 12 can be parallel or slightly inclined, with the principle that the plurality of holes 13a will not penetrate or connect with each other. On the other hand, the cross-sectional shape of each hole 13a can be, for example, circular, elliptical, or polygonal, and the cross-sectional shape and size of the plurality of holes 13a provided in the same support portion 12 can be the same or different. In one embodiment of the present invention, the number of holes 13a provided in each support portion 12 can be three, and one hole 13a is closer to the free end of the support portion 12 (closer to the short end edge 122), while the other two holes 13a are farther away from the free end of the support portion 12 (closer to the long end edge 121).

[0074] Furthermore, referring to Figure 5, on the XY plane, each hole 13a has a maximum slot width W, and each hole 13a is surrounded by a solid material area R. The support portion 12, in principle, does not have holes or cuts in this solid material area R. The edge of the solid material area R (e.g., at the two-point chain line in Figure 5) has a distance D to the edge of the hole 13a. The ratio of the distance D to the maximum slot width W is 0.62 to 0.93; for example, the distance D is 1 to 1.5 mm, and the maximum slot width W is 1.6 mm. Thus, the support portion 12 can have moderate rigidity without excessive collapse space. After several drops, the support portion 12 can still elastically recover its original shape without permanently deforming after one or two drops, thus improving durability.

[0075] Wherein, for example but not limited, the maximum groove width W of the hole 13a can be about 1 to 1.5 mm, so as to balance good formability and drop protection. And the test results show that, under the same drop conditions, when the cross-sectional shape of the hole 13a is circular and a hole diameter of 1 mm (i.e., the maximum groove width W) is used, a better drop protection effect can be achieved.

[0076] Referring again to Figures 1 to 3, in one embodiment of the present invention, the inner frame 1 may also have several protrusions 14. These protrusions 14 can be connected to the outer ring surface 112 of the body 11 and are respectively located on both sides of the body 11 in the transverse (X direction). The protrusions 14 may or may not be engaged with the frame 21. In this way, the protrusions 14 can strengthen the support effect on both sides of the frame 21, making it easy for the air chamber S2 to maintain its predetermined shape and rigidity. In addition, when the mobile device M is dropped sideways, most of the impact force can be buffered and dissipated by the air chamber S2, and the remaining impact force can be transmitted inward to the body 11 through the protrusions 14 located on that side, making the protective shell of the mobile device also very effective in protecting against side falls.

[0077] Referring also to Figures 3 and 6, in one embodiment of the present invention, the shape of each protrusion 14 can generally match the cross-sectional shape of the air chamber S2 at the corresponding position; that is, a portion of the air chamber S2 can be filled by the protrusion 14 to form two separated spaces on both sides of the protrusion 14, and the gas in the two spaces does not easily flow between each other through the protrusion 14. Therefore, as long as there are no holes connecting the chamber S1 or the outside, a relatively rigid buffer airbag 3 can be formed between two adjacent protrusions 14, or between adjacent protrusions 14 and the support 12, to improve the energy dissipation effect of the impact force. In particular, when each protrusion 14 is fixedly connected to the frame 21, the plurality of buffer airbags 3 can form a near-airtight state, which helps to improve the deformation resistance and energy dissipation effect of the plurality of buffer airbags 3. Referring to Figure 1, in this embodiment, several airbags 3 are generally formed near the short side M2 ​​of the main body 11 corresponding to the mobile device M, but this is not a limitation.

[0078] Referring again to Figures 1 to 3, in one embodiment of the present invention, the inner frame 1 may have several buttons 15. These buttons 15 are located on at least one side of the body 11 in the lateral (X direction) direction, respectively corresponding to several function buttons of the mobile device M, such as power buttons or volume control buttons. The protrusions 14 of each protrusion from the body 11 are greater than the protrusions of each button 15 from the body 11, and none of the buttons 15 are engaged with the outer frame 2; that is, each button 15 is spaced apart from the inner circumferential surface 211 of the frame 21 and does not contact it. Thus, each button 15 is less likely to be accidentally triggered when the frame 21 is deformed by force. In some embodiments, the buttons 15 may only slightly touch the outer frame 2, or some buttons 15 may touch the outer frame 2 while others do not.

[0079] It is worth mentioning that when the button 15 is located between two adjacent protrusions 14, the body 11 will not form an airtight seal at the button 15 because of the hole formed therein. That is, the buffer airbag 3 will not be formed between the two adjacent protrusions 14. Therefore, even if the button 15 needs to be pressed through the frame 21, the button 15 will not be difficult to press and trigger. In addition, the plurality of support portions 12, the plurality of protrusions 14 and the plurality of buttons 15 of the inner frame 1 can all be covered within the frame 21. Unlike conventional protective cases that expose buttons, the mobile device protective case of this embodiment not only has a unique integrated and simple texture in appearance, but also protects the button 15 from being scratched or falling off by the frame 21.

[0080] Referring also to Figures 2 and 7, in one embodiment of the present invention, the thickness (wall thickness T1 on the XY plane) of the frame 21 at the location of the plurality of buttons 15 can be thinner than other parts. This not only widens the distance between each button 15 and the inner circumferential surface 211 of the frame 21, reducing the probability of accidental triggering of the button 15, but also makes the frame 21 softer and easier to press and deform at the location of the plurality of buttons 15, allowing the user to feel the elasticity of a cushion when pressing the button 15 through the frame 21, without making it difficult to trigger the button 15. Furthermore, the support portion 12, protrusion 14, and buttons 15 of the inner frame 1 can all be integrally formed and connected to the body 11, thereby improving the manufacturing convenience of the inner frame 1.

[0081] Please refer to Figures 1 and 2. In one embodiment of the present invention, the outer frame 2 may be transparent or semi-transparent to allow the color of the inner frame 1 to show through or to make the shape of the inner frame 1 visible from the outside, forming a layered appearance and facilitating the identification of the positions of the plurality of buttons 15. Specifically, the light transmittance of the outer frame 2 may be greater than that of the inner frame 1, and the light transmittance of the inner frame 1 may be approximately 0-40%, allowing the inner frame 1 to show through the outer frame 2 and creating a cushion-like visual effect.

[0082] Furthermore, please refer to Figures 1 to 3. The joining means used to connect the outer frame 2 and the inner frame 1 may be, for example, but not limited to, gluing, welding or convex-concave fitting, etc., wherein welding with high joint strength is preferred; and different joining means may be included in all joints between the outer frame 2 and the inner frame 1.

[0083] In one embodiment of the present invention, the outer frame 2 may further have a back plate 22, which can be connected to the frame body 21 and shield all or part of the rear end of the frame body 21. That is, the back plate 22 can block the back side of the mobile device M, protecting the back side of the mobile device M from damage. The back plate 22 may have openings to accommodate functional parts of the mobile device M, such as camera holes or fingerprint sensor holes. Furthermore, in one embodiment of the present invention, the back plate 22 can be integrally formed and connected to the rear end of the frame body 21 to improve the structural stability of the frame body 21 and to improve the positioning convenience and accuracy when welding the frame body 21 and the inner frame 1, thus helping to improve the welding quality of the two.

[0084] Please refer to Figures 3 and 8, where the area depicted in Figure 8 with fine sand dots represents the joint between the inner frame 1 and the outer frame 2. That is, the front periphery 113 of the body 11 of the inner frame 1 in the Z direction joins with the frame body 21 of the outer frame 2; referring to Figure 6, for example, a rear periphery 213 of the frame body 21, facing backwards from its free end, abuts against the front periphery 113 of the body 11 in the Z direction. The rear periphery 114 of the body 11 of the inner frame 1 in the Z direction joins with the frame body 21 or the back plate 22 of the outer frame 2. Several protrusions 14 of the inner frame 1 join with the inner peripheral surface 211 of the frame body 21 of the outer frame 2; in other embodiments, the several protrusions 14 may not join with the inner peripheral surface 211 of the frame body 21.

[0085] Please refer to Figures 1, 3 and 8. The lower end of the body 11 of the inner frame 1 in the Y direction is also engaged with the inner peripheral surface 211 of the frame 2 of the outer frame 2. Since some mobile devices M may have a sound hole, charging hole, data transmission hole or stylus storage hole at the lower end in the Y direction, in one embodiment of the present invention, the body 11 of the inner frame 1 may have several functional holes at the lower end, and the lower end of the body 11 may also form a protruding peripheral wall 115 around the several functional holes, so that the peripheral wall 115 engages with the inner peripheral surface 211 of the frame 21. Furthermore, the functional holes and their peripheral walls 115 can be configured to correspond to the number and position of sound holes, charging holes, data transmission holes, or stylus storage holes, or adjacent functional holes can share the peripheral wall 115. Part of the peripheral wall 115 can also engage with the inner peripheral surface 211 of the frame 21 on its front and rearward sides, allowing the peripheral wall 115 to form an independent buffer airbag 3 with the adjacent protrusion 14. More specifically, the peripheral wall 115 can have a connecting surface 116 formed on its front and rearward (Z-direction) sides, which can connect the lower end of the peripheral wall 115 in the Y-direction and the front ring perimeter 113 (or the rear ring perimeter 114). Referring to Figure 2, the connecting surface 116 can be arc-shaped to conform to the shape of the inner peripheral surface 211 of the frame 21.

[0086] On the other hand, referring to FIG4, the free end of the support portion 12 can interfere with the inner peripheral surface 211 of the frame 21. In one embodiment of the present invention, the interference between the free end of the support portion 12 and the inner peripheral surface 211 of the frame 21 is about 0.4 to 1 mm. In this embodiment, the interference is about 0.4 to 1 mm, so that the two can fit tightly together and provide a preload effect. In addition, the structure at the joint between the inner frame 1 and the outer frame 2 can be pre-set with a small amount of interference to ensure that after the outer frame 2 fits the inner frame 1, the structure or part of the structure can be effectively joined by the aforementioned means.

[0087] It is worth mentioning that, in this embodiment, no joining means are applied to the free end of the support 12 abutting against the inner peripheral surface 211 of the frame 21. The purpose is to avoid the protective shell of the mobile device forming excessive rigidity at the location corresponding to the support 12. In other embodiments, the interference between the free end of the support 12 and the inner peripheral surface 211 of the frame 21 can be adjusted (e.g., the interference can be reduced or adjusted to a state without interference), while a joining means are applied, which can also achieve the purpose of avoiding excessive rigidity while having a strong connection.

[0088] Please refer to Figures 1, 3, and 9. Taking a mobile device M that matches the protective shell of the mobile device shown in this embodiment as an example, the mobile device M has two opposite long sides M3 and two opposite short sides M2. Any two adjacent long sides M3 and short sides M2 can be extended to intersect at a point. A diagonal line passes through one set of two intersection points located diagonally, and another diagonal line passes through another set of two intersection points located diagonally. The point where the two diagonal lines intersect is the centroid P1 of the mobile device M. The line passing through the centroid P1 and any of the aforementioned intersection points is referred to as the centroid line L1.

[0089] Please refer to Figure 9. Since the mobile device M usually hits the ground at a corner when it falls, this invention will describe the situation where one of the centroid lines L1 of the mobile device M is perpendicular to the ground L0 when it falls. In one embodiment of this invention, the support part 12 is located at the corner of the body 11, and the middle position (or most of the volume) of the support part 12 can be located between the two centroid lines L1, and is closer to the two sides of the inner frame 1 in the longitudinal (Y direction) direction (also called the top and bottom sides, corresponding to the short side M2 ​​of the mobile device M). In this way, the support part 12 in this embodiment can avoid excessive rigidity due to its large volume, and can achieve a better drop protection effect within the limited volume constraints.

[0090] More specifically, please refer to Figures 9 and 10. The two cycloids L2 pass through the center of mass P1 and form a 20-degree angle with the center of mass line L1, which is orthogonal to the ground L0; that is, the two cycloids L2 represent the fall paths that deflect 20 degrees to the left or right during a fall. The two extension lines L3 are orthogonal to the two cycloids L2 and are tangent to the outer peripheral surface 212 of the frame 21 at two tangent points P2, and both tangent points P2 are located within the area projected onto the outer peripheral surface 212 by the support portion 12; preferably, the two tangent points P2 can also be projected onto the boundary of the area of ​​the free end of the support portion 12 on the outer peripheral surface 212. Thus, the protective shell of the mobile device can ensure that within the fall range of 20 degrees deflection to the left and right of the center of mass line L1, the fall point can be aligned with the support portion 12, providing optimal fall protection.

[0091] Referring to Figures 1 to 3, in one embodiment of the present invention, the inner frame 1 and the outer frame 2 are preferably made of the same material so that they can be crushed into small pieces together during recycling without the need for disassembly and separation. This improves recycling efficiency and reduces recycling costs. For example, but not limited to, both the inner frame 1 and the outer frame 2 can be made of thermoplastic elastomer (TPE), particularly recycled TPE obtained from recyclable materials.

[0092] In addition, in one embodiment of the present invention, the back plate 22 may have a thin area 221 on the lower inner surface. The back plate 22 is thinner in the thin area 221 to form an area for placing a hanging piece, so as to avoid the mobile device M and the mobile device protective case not being accurately aligned and joined due to the thickness of the hanging piece. The hook part of the hanging piece can pass through the frame 21 for a matching mobile phone strap or lanyard to be attached.

[0093] Furthermore, in one embodiment of the present invention, the air chamber S2 may also contain several cushioning particles or at least one decorative element. Thus, the mobile device protective case of this embodiment can enhance the cushioning and impact protection effect through the several cushioning particles, or enhance the diversity of the overall appearance through the several cushioning particles or the decorative element, providing the function of customized design and increasing consumers' willingness to purchase.

[0094] Please refer to Figure 11, which is a second embodiment of the protective shell for the mobile device of the present invention. This embodiment is generally the same as the first embodiment described above, except that the frame 21 of this embodiment may have several protruding abutments 214, each of which protrudes from the inner circumferential surface 211 of the frame 21 and is suitable for the outer ring surface 112 of the body 11 to abut against.

[0095] In detail, please refer to Figures 11 and 12. In one embodiment of the present invention, on the side of the frame 21 where no holes are provided, for example, the side corresponding to the long side M3 of the mobile device M, the protruding part 214 can extend in an elongated shape on the inner peripheral surface 211, and the cross-section of the protruding part 214 can be generally C-shaped, so that the free end of the protruding part 214 can form two abutting surfaces 2141 spaced apart in the Z direction.

[0096] Referring also to Figures 11 and 13, on the side of the frame 21 where the hole is provided, for example, corresponding to the short side M2 ​​of the moving device M, the protruding abutment 214 can be in the shape of a short strip, and a protruding abutment 214 can be formed on each of the two sides of the hole in the Z direction. Furthermore, the free end of each of the protruding abutments 214 can form an abutment surface 2141, and thus two abutment surfaces 2141 spaced apart in the Z direction can also be formed.

[0097] Please refer to Figures 14 to 16. When the inner frame 1 is assembled into the frame 21 of the outer frame 2, each of the abutting surfaces 2141 can abut against or interfere with the outer ring surface 112 of the body 11 to form a stable support for the outer ring surface 112 of the body 11. Thus, when the inner frame 1 and the outer frame 2 are to be welded together, the fixture placed in the chamber S1 can push the inner frame 1 from the inside out, so that the outer ring surface 112 of the body 11 can be tightly abutted against each of the abutting surfaces 2141. In the part shown in FIG15, the abutting surface 2141 can also serve as the bearing surface of the front ring periphery 113 and the rear ring periphery 114 of the body 11 in the X direction; in the part shown in FIG16, the abutting surface 2141 can also serve as the bearing surface of the front ring periphery 113 and the rear ring periphery 114 of the body 11 in the Y direction. Therefore, each of the protruding portions 214 can stably stop the body 11, so that the body 11 will not move outward excessively, thereby ensuring that the body 11 can be maintained in the predetermined position for welding, and the part of the inner frame 1 and the outer frame 2 to be welded can be tightly abutted, thereby effectively improving the welding quality of the inner frame 1 and the outer frame 2. For example, but not limited to, the interference between the contact surface 2141 and the outer annular surface 112 of the body 11 can be about 0.1 to 0.3 mm, preferably 0.2 mm.

[0098] It is worth mentioning that, in embodiments where the body 11 has the plurality of protrusions 14, the length of the abutment 214 can extend close to the protrusion 14, and preferably the side edge of the abutment 214 does not contact the protrusion 14, so as not to affect the engagement between the protrusion 14 and the inner peripheral surface 211 of the frame 21. In some embodiments, the side edge of the abutment 214 may also be configured to contact the protrusion 14.

[0099] Please also refer to Figures 15 and 16. In one embodiment of the present invention, the back plate 22 of the outer frame 2 may form a raised portion 222 on its inner surface. The raised portion 222 is adjacent to the frame body 21 and is spaced at a predetermined distance from the protruding portion 214, so as to form a groove between the raised portion 222 and the protruding portion 214 to accommodate the rear periphery 114 of the body 11, which helps to improve the stability of the body 11 disposed in the outer frame 2.

[0100] Furthermore, referring to FIG11, in one embodiment of the present invention, the outer peripheral surface 212 of the frame 21 may be provided with a plurality of rough portions 215, which correspond to a plurality of buttons 15 located in the inner frame 1. In this way, the plurality of rough portions 215 can provide a distinctive tactile feel, allowing the user to use touch to find the position corresponding to the button 15 for pressing and triggering.

[0101] For example, but not limited to, the rough portion 215 can be formed by knurling or polishing a portion of the outer peripheral surface 212; or, in one embodiment of the present invention, the rough portion 215 can be a raised texture protruding from the outer peripheral surface 212, the shape of which can be, for example, a strip, a particle or a specific pattern, and the height of the rough portion 215 protruding from the outer peripheral surface 212 is about 0.15 mm, so as to provide better tactile feel and recognizability.

[0102] Please refer to Figure 17, which is the third embodiment of the protective shell for the mobile device of the present invention. This embodiment is largely the same as the first embodiment described above, except that the lower end of the body 11 of the inner frame 1 in this embodiment may be provided with an elongated opening, so that the body 11 does not form a complete ring, but forms a partially open shape at the lower end of the body 11. The body 11 may be connected to at least one of the holes located in the mobile device M (marked in Figure 1), such as the sound hole, charging hole, data transmission hole, and stylus storage hole, through the elongated opening. The inner peripheral surface 211 of the frame 21 of the outer frame 2 may be engaged with the side edge 117 of the elongated opening at the lower end of the body 11, thus forming an independent buffer airbag 3 with the adjacent protrusion 14.

[0103] In addition, the inner frame 1 of this embodiment may further include an inner plate 16, which is integrally formed and connected to the rear-facing end of the body 11, and together with the body 11 defines the chamber S1, so that the chamber S1 opens to the front. In this way, even if the body 11 does not form a complete ring, the structural stability of the inner frame 1 can be improved by the inner plate 16, thereby improving the joining quality between the inner frame 1 and the outer frame 2.

[0104] Please refer to Figures 18 and 19, which show the fourth embodiment of the protective shell for the mobile device of the present invention. This embodiment is largely the same as the first embodiment described above, with the main difference being the shape of the collapsible space 13 in the inner frame 1.

[0105] In detail, the support portion 12 of this embodiment may have a plurality of slots 13b to form a collapsible space 13 of the support portion 12. Each slot 13b extends from the free end of the support portion 12 toward the body 11. In the embodiment shown in FIG. 18, the slot 13b may optionally penetrate the surface of the support portion 12 in the Z direction; or in the embodiment shown in FIG. 19, the slot 13b may optionally penetrate the surface of the support portion 12 in the XY plane.

[0106] Please refer to Figure 20, which is the fifth embodiment of the protective case for the mobile device of the present invention. This embodiment is largely the same as the second embodiment described above, except that the outer frame 21 is provided with a structure that is easier to press and deform to trigger the button 15 of the inner frame 1.

[0107] In detail, please refer to Figures 20 to 24. In this embodiment, the frame 21 may have at least one recessed area 216 for the plurality of buttons 15. In the recessed area 216, the thickness T2 of the front and rear side edges of the frame 21 is thinner. In other words, as shown in Figures 21 and 24, on the XZ plane, the thickness T2 of the frame 21 in the recessed area 216 (especially the two opposite parts adjacent to the Z direction, i.e., adjacent to the front and rear side edges of the frame 21) may be thinner than the thickness of other parts of the frame 21 in the Y direction. Thus, the flexibility of the frame 21 in this embodiment is improved at the recessed area 216, thereby forming a softer and more easily pressable and deformable part, allowing the user to accurately trigger the buttons 15 located within the range of the recessed area 216 with only moderate force. In addition, the difference in height between the recessed area 216 and the side edges of other parts can also create a distinctive tactile feel, allowing users to quickly find the recessed area 216 by touch alone, and accurately find the position corresponding to the button 15 by the several rough parts 215 so as to press and trigger it. Therefore, the frame 21 of this embodiment can provide better operating feel and convenience.

[0108] Please refer to Figures 20, 22, and 23. As mentioned above, the frame 21 of this embodiment can improve the local flexibility of the frame 21 by providing the inward recess 216. Therefore, this embodiment can also optionally have the inner frame 1 have at least one skirt 17, which airtightly connects the button 15 and the body 11. In this way, even if there is water vapor in the chamber S1 of the inner frame 1, the water vapor will not seep into the air chamber S2 between the inner frame 1 and the outer frame 2, causing condensation between the inner frame 1 and the outer frame 2 and affecting the aesthetics.

[0109] Referring to Figures 20 and 24, the skirt 17 in this embodiment can be formed in a convex arc shape, and the button 15 is connected to the outermost convex part of the skirt 17. The skirt 17 is preferably made thinner, especially at the point where it adjoins the button 15, to have higher flexibility. This allows the skirt 17 to elastically deform when the button 15 is pressed, enabling the button 15 to smoothly move into the chamber S1 of the inner frame 1 to trigger the button of the moving device M (labeled in Figure 1). For example, the wall thickness T3 of the skirt 17 can be the thinnest achievable in the injection molding process (currently approximately 0.6 mm, but not limited thereto). Furthermore, the thickness T3 of the skirt portion 17 can gradually increase from the point of connection to the button 15 towards the point of connection to the body 11. For example, the thickness T3 of the skirt portion 17 at the point of connection to the body 11 can be approximately 0.7 mm, thereby avoiding the shrinkage deformation problem commonly encountered in the injection molding process at the point of connection to the body 11. Besides the aforementioned method of thinning the thickness T3 of the skirt portion 17, in other embodiments, a cut can be provided at the point of connection between the skirt portion 17 and the button 15 (whether the cut is formed from the inside or outside of the skirt portion 17), allowing the button 15 to smoothly trigger the button of the mobile device M.

[0110] Furthermore, the third span D3 of the skirt 17 in the Z direction is preferably wider, which helps to improve the flexibility of the skirt 17; however, it is necessary to ensure that the inner side of the body 11 still has sufficient thickness to stably support the motion device M.

[0111] It is worth mentioning that, please refer to Figures 20 and 22. In this embodiment, each of the several protrusions 14 of the inner frame 1 can have a wider bottom (at the outer ring surface 112 connecting the body 11) to provide good lateral drop protection. Each of the protrusions 14 can be engaged with the frame 21 or not engaged with the frame 21. This invention does not limit this.

[0112] Please refer to Figures 20 and 25. This embodiment also provides different types of collapsible spaces 13 in the inner frame 1. In this embodiment, the collapsible space 13 is a plurality of holes 13a provided in the support portion 12, and each hole 13a can be formed into an elongated hole with arc-shaped ends. In this way, after the protective shell of the mobile device is dropped several times, each hole 13a is not prone to permanent collapse or deformation, thus improving durability.

[0113] For example, but not limited to, in one embodiment of the present invention, the number of holes 13a can be three. The middle hole 13a is approximately located at the middle position of the support portion 12, and its major axis is generally parallel to the direction extending from the free end of the support portion 12 towards the chamber S1. The major axes of the two side holes 13a are generally parallel to the two inclined side edges of the support portion 12, so as to combine durability and aesthetics. In other embodiments, the major axes of the two side holes 13a can each be parallel to the major axis of the middle hole 13a, or form an angle of less than 60 degrees with the major axis of the middle hole 13a.

[0114] The present invention has been disclosed above with reference to preferred embodiments. However, those skilled in the art should understand that these embodiments are only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all variations and substitutions equivalent to these embodiments should be included within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims, and the scope of the appended claims should be interpreted in the broadest sense to include all modifications, similar arrangements, and processes. Furthermore, when the above embodiments can be combined, the present invention includes any combination of embodiments. [Simplified Explanation of the Diagram]

[0061] [Figure 1] is a three-dimensional exploded view of the first embodiment of the mobile device protective case of the present invention and the mobile device. [Figure 2] is a three-dimensional exploded view of the first embodiment of the mobile device protective case of the present invention. [Figure 3] is a cross-sectional view along line AA in Figure 1. [Figure 4] is an enlarged view of area B in Figure 3. [Figure 5] is a partial enlarged view of Figure 4, with the outer frame omitted. [Figure 6] is a cross-sectional view along line CC in Figure 3. [Figure 7] is an enlarged view of area D in Figure 3. [Figure 8] is a three-dimensional structural diagram of the inner frame of the first embodiment of the present invention, wherein the area depicted in fine sand dots in the figure is where the inner frame is suitable for joining with the outer frame. [Figure 9] is a schematic diagram of the mobile device protective case and the mobile device of the present invention being dropped at a corner. [Figure 10] is a partial enlarged view of Figure 9. [Figure 11] is a three-dimensional exploded view of the second embodiment of the mobile device protective case of the present invention and the mobile device. [Figure 12] is a three-dimensional cross-sectional structural diagram of the upper outer frame of the second embodiment of the present invention. [Figure 13] is a perspective cross-sectional view of the lower outer frame of the second embodiment of the present invention. [Figure 14] is a top view of the second embodiment of the mobile device protective shell of the present invention. [Figure 15] is a cross-sectional view along line EE of Figure 14. [Figure 16] is a cross-sectional view along line FF of Figure 14. [Figure 17] is a partial perspective view of the third embodiment of the mobile device protective shell of the present invention. [Figure 18] is a top view of the upper inner frame of the fourth embodiment of the present invention, showing a first type of groove. [Figure 19] is a side view of the upper inner frame of the fourth embodiment of the present invention, showing a second type of groove. [Figure 20] is an exploded perspective view of the fifth embodiment of the mobile device protective shell of the present invention. [Figure 21] is a side view of the fifth embodiment of the mobile device protective shell of the present invention. [Figure 22] is a cross-sectional view along line GG of Figure 21. [Figure 23] is a perspective cross-sectional view of the lower mobile device protective shell of the fifth embodiment of the present invention. [Figure 24] is a cross-sectional view along line HH in Figure 22. [Figure 25] is an enlarged view of region I in Figure 22.

Claims

1. A protective shell for a mobile device, comprising: an inner frame having a body and at least one support portion, the support portion being connected to an outer annular surface of the body, the support portion having a collapsible space; and an outer frame connected to the inner frame by a joining means, the outer frame having a frame body, an inner peripheral surface of the frame body being spaced apart from the outer annular surface of the body to form an air chamber; wherein... The free end of the support part interferes with the inner circumferential surface of the frame.

2. The protective case for the mobile device as described in claim 1, wherein, The light transmittance of the outer frame is greater than that of the inner frame.

3. The protective case for the mobile device as described in claim 2, wherein, The light transmittance of the inner frame is 0-40%.

4. The protective case for the mobile device as described in claim 1, wherein, The inner frame has several protrusions that connect to the outer ring surface of the body and are located on both sides of the body in the lateral direction. The protrusions are engaged with the frame.

5. The protective case for the mobile device as described in claim 4, wherein, The air chamber is partially filled by the protrusion to form several airtight buffer airbags in the air chamber.

6. The protective case for the mobile device as described in claim 4, wherein, The inner frame has several buttons located on at least one side of the body in the horizontal direction, and each protrusion protrudes from the body by a greater extent than the button protrudes from the body.

7. The protective case for the mobile device as described in claim 6, wherein, The inner frame's support, protrusions, and buttons are all integrally formed and connected to the main body.

8. The protective case for the mobile device as described in claim 6, wherein, None of the buttons are attached to the outer frame, and each button is spaced apart from the inner circumferential surface of the frame without contacting it.

9. The protective case for the mobile device as described in claim 8, wherein, The frame is thinner at the locations of the buttons.

10. The protective case for the mobile device as described in claim 6, wherein, The outer periphery of the frame has several rough portions, which are respectively located on the buttons.

11. The protective case for the mobile device as described in claim 10, wherein, The rough portion protrudes 0.15 mm above the outer periphery of the frame.

12. The protective case for the mobile device as described in claim 6, wherein, The frame has at least one recessed area for the buttons, in which the front and rear edges of the frame are thinner.

13. The protective case for the mobile device as described in claim 12, wherein, The inner frame has at least one skirt that airtightly connects the button to the body.

14. The protective case for the mobile device as described in claim 1, wherein, The joining method is fusion welding.

15. The protective case for the mobile device as described in claim 14, wherein, The frame has several protruding abutments, each of which protrudes from the inner circumferential surface of the frame. The free end of each protruding abutment forms at least one abutting surface, which interferes with the outer circumferential surface of the body.

16. The protective case for the mobile device as described in claim 15, wherein, The interference between the contact surface and the outer ring surface of the body is 0.1 to 0.3 mm.

17. The protective case for the mobile device as described in claim 1, wherein, The interference between the free end of the support and the inner circumferential surface of the frame is 0.4 to 1 mm.

18. The protective case for the mobile device as described in claim 1, wherein, The free end of the support abuts against the inner circumferential surface of the frame without being joined by the engagement method.

19. The protective case for a mobile device as described in claim 1, wherein, The main body of the inner frame has an inner ring surface that encloses and defines a chamber suitable for accommodating a mobile device. The mobile device has two opposing long sides and two opposing short sides. Any two adjacent long sides and short sides extend and intersect at an intersection point. The line passing through the center of mass of the mobile device and any of the aforementioned intersection points is the center line. The support is located at a corner of the main body, and the middle position of the support is located between the two center lines and is closer to the two sides of the inner frame in the longitudinal direction.

20. The protective case for a mobile device as described in claim 19, wherein, The two cycloids pass through the center of mass and form a 20-degree angle with the center of mass line. The two extension lines are orthogonal to the two cycloids and are tangent to the outer peripheral surface of the frame at two tangent points. Both tangent points are located within the range of the support portion projected onto the outer peripheral surface.

21. The protective case for the mobile device as described in claim 20, wherein, The two tangent points are projected onto the outer periphery of the support portion at the free end, respectively.

22. The protective case for the mobile device as described in claim 1, wherein, There are several support components, which are located at various corners of the main body.

23. The protective case for the mobile device as described in claim 1, wherein, The support portion has a long end edge and a short end edge, the long end edge of which is connected to the outer ring surface of the body, and the short end edge is located at the free end of the support portion.

24. The protective case for the mobile device as described in claim 23, wherein, The long end edge of the support has a first span, and the short end edge of the support has a second span, the ratio of the first span to the second span being 3:

2.

25. The protective case for the mobile device as described in claim 1, wherein, The collapse space is formed by several holes located in the support.

26. The protective case for a mobile device as described in claim 25, wherein, There are three holes, one of which is closer to the free end of the support, and the other two are farther away from the free end of the support.

27. The protective case for a mobile device as described in claim 25, wherein, Each hole has a maximum slot width, and each hole has a solid material area around it. The edge of the solid material area is spaced from the edge of the hole to the hole edge. The ratio of the spaced distance to the maximum slot width is 0.62 to 0.

93.

28. The protective case for the mobile device as described in claim 27, wherein, The maximum slot width of this hole is 1 to 1.5 mm.

29. The protective case for a mobile device as described in claim 25, wherein, The hole is an elongated hole with arc-shaped ends.

30. The protective case for the mobile device as described in claim 1, wherein, The collapse space is a number of grooves provided on the support, each of which extends from the free end of the support towards the body.

31. The protective case for the mobile device as described in claim 1, wherein, The radius of curvature at the corner of the frame is smaller than the radius of curvature at the corner of the main body.

32. The protective case for the mobile device as described in claim 31, wherein, The maximum distance between the corner of the frame and the corner of the main body is more than 4 mm.

33. The protective case for the mobile device as described in claim 1, wherein, Both the inner and outer frames are made of thermoplastic elastomer (TPE).

34. The protective case for the mobile device as described in claim 1, wherein, The outer frame has a back panel with a thin area on the lower inner surface of the back panel, and the back panel is thinner in the thin area.

35. The protective case for the mobile device as described in claim 1, wherein, The air chamber contains several cushioning particles or at least one decorative element.

36. A protective shell for a mobile device, comprising: an inner frame having a body and a plurality of support portions connected to an outer annular surface of the body; and an outer frame connected to the inner frame by a joining means, the outer frame having a frame body, an inner peripheral surface of the frame body being spaced apart from the outer annular surface of the body to form an air chamber; wherein... The free ends of the several support parts interfere with the inner circumferential surface of the frame.

37. An inner frame of a protective shell for a mobile device, comprising: a body having an inner annular surface and an outer annular surface, and the inner annular surface enclosing a chamber suitable for accommodating a mobile device; and at least one support portion connected to the outer annular surface of the body, the support portion having a collapsible space, the free end of the support portion being adapted to interfere with an inner peripheral surface of a frame of an outer frame.

38. The inner frame of the mobile device protective case as described in claim 37, wherein, The inner frame has several protrusions that connect to the outer ring surface of the body and are located on both sides of the body in the lateral direction. The protrusions are adapted to engage with the frame.

39. The inner frame of the mobile device protective case as described in claim 38, wherein, The inner frame has several buttons located on at least one side of the body in the horizontal direction, and each protrusion protrudes from the body by a greater extent than the button protrudes from the body.

40. The inner frame of the mobile device protective case as described in claim 39, wherein, The inner frame's support, protrusions, and buttons are all integrally formed and connected to the main body.

41. The inner frame of the mobile device protective case as described in claim 39, wherein, The inner frame has at least one skirt that airtightly connects the button to the body.

42. The inner frame of the mobile device protective case as described in claim 37, wherein, The device has two opposite long sides and two opposite short sides. Any two adjacent long sides and short sides extend and intersect at a point. The line passing through the center of mass of the device and any of the aforementioned points is the center line. The support is located at the corner of the body. The middle position of the support is located between the two center lines and is closer to the two sides of the inner frame in the longitudinal direction.

43. The inner frame of the mobile device protective case as described in claim 37, wherein, There are several support components, which are located at various corners of the main body.

44. The inner frame of the mobile device protective case as described in claim 37, wherein, The support portion has a long end edge and a short end edge, the long end edge of which is connected to the outer ring surface of the body, and the short end edge is located at the free end of the support portion.

45. The inner frame of the mobile device protective case as described in claim 44, wherein, The long end edge of the support has a first span, and the short end edge of the support has a second span, the ratio of the first span to the second span being 3:

2.

46. ​​The inner frame of the mobile device protective case as described in claim 37, wherein, The collapse space is formed by several holes located in the support.

47. The inner frame of the mobile device protective case as described in claim 46, wherein, There are three holes, one of which is closer to the free end of the support, and the other two are farther away from the free end of the support.

48. The inner frame of the mobile device protective case as described in claim 46, wherein, Each hole has a maximum slot width, and each hole has a solid material area around it. The edge of the solid material area is spaced from the edge of the hole to the hole edge. The ratio of the spaced distance to the maximum slot width is 0.62 to 0.

93.

49. The inner frame of the mobile device protective case as described in claim 48, wherein, The maximum slot width of this hole is 1 to 1.5 mm.

50. The inner frame of the mobile device protective case as described in claim 37, wherein, The collapse space is a number of grooves provided on the support, each of which extends from the free end of the support towards the body.

Images