Protective case for mobile device and inner frame thereof

Abstract

Provided in the present invention are a protective case for a mobile device and an inner frame thereof, which are adapted to fit with a mobile device. The protective case for a mobile device comprises an inner frame and an outer frame. The inner frame has a body and at least one support portion, wherein the support portion is connected to an outer annular surface of the body, and the support portion is provided with a collapse space. The outer frame is connected to the inner frame by means of engagement, the outer frame has a frame body, and an inner peripheral surface of the frame body is spaced apart from and opposite the outer annular surface of the body to form an air chamber. Further disclosed in the present invention is an inner frame of the protective case for a mobile device. The protective case for a mobile device of the present invention can form a shock-absorbing structure at a position prone to impact from dropping, so as to achieve proper support and buffer energy dissipation effects, thereby effectively dispersing and absorbing an impact force, and thus improving the drop protection effect on the mobile device. FIG. 3

Description

[0001] The present invention relates to a peripheral accessory for a mobile device, in particular to a mobile device protective case and an inner frame thereof. With the increasing frequency of modern people using mobile devices, in order to avoid damage or malfunction of the mobile device caused by accidental dropping, there are quite a variety of protective cases on the market to assemble with mobile devices such as mobile phones, tablet computers, e-book readers, personal digital assistants, smart watches or wireless charging boxes for earphones. Among them, many existing protective cases have airbags arranged at the corners to absorb the impact force when falling. However, the existing protective cases lack proper support structure at the airbag and are too weak in rigidity, so when subjected to impact force, the airbag often deforms too much, 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 mobile device, so the effect of drop protection is not ideal. In view of the defects of the prior art, the applicant felt that it was not perfect and thus made great efforts to overcome it and successfully developed a mobile device protective case with a corner formed with a shock-absorbing structure that can effectively disperse and absorb impact force and improve the drop protection effect on the mobile device. In addition, the present invention further provides an inner frame that can be combined with an outer frame to form the above-mentioned mobile device protective case. In order to achieve the above-mentioned or other purposes, the present invention provides a mobile device protective case comprising an inner frame and an outer frame. The inner frame has a body and at least one support portion connected to the outer surface of the body, and the support portion is provided with a collapse space. The outer frame is connected to the inner frame by engagement means, and the outer frame has a frame body, and the inner circumferential surface of the frame body is spaced from the outer surface of the body to form an air chamber. The present invention further provides a mobile device protective case comprising an inner frame and an outer frame. The inner frame has a body and a plurality of support portions connected to the outer surface of the body. The outer frame is connected to the inner frame by engagement means, and the outer frame has a frame body, and the inner circumferential surface of the frame body is spaced from the outer surface of the body to form an air chamber. In the above-mentioned mobile device protective case, the light transmittance of the outer frame can be greater than that of the inner frame. In the above-mentioned mobile device protective case, the light transmittance of the inner frame is about 0-40% oIn the protective case for mobile device, the inner frame can have a plurality of protrusions, the plurality of protrusions connect the outer circumferential surface of the body and are respectively located on both sides of the body in the lateral direction, and the plurality of protrusions are engaged with the frame. In the protective case for mobile device, the partial air chamber can be filled with the protrusions to form a plurality of air-tight buffer air bags in the air chamber. In the protective case for mobile device, the inner frame can have a plurality of keys, the plurality of keys are located on at least one side of the body in the lateral direction, and the protrusions of each protrusion protrude from the body by a greater amplitude than the keys. In the protective case for mobile device, the support portion, the protrusions, and the keys of the inner frame can be integrally formed with the body. In the protective case for mobile device, the plurality of keys are not engaged with the outer frame, and each key is spaced apart from the inner circumferential surface of the frame without contact. In the protective case for mobile device, the thickness of the frame at the plurality of keys can be thinner. In the protective case for mobile device, the outer circumferential surface of the frame can have a plurality of rough portions, and the plurality of rough portions are respectively located at the plurality of keys. In the protective case for mobile device, the height of the rough portion protruding from the outer circumferential surface of the frame is about 0.15 mm. In the protective case for mobile device, the frame can have at least one inwardly recessed region at the plurality of keys, and the frame has a thinner thickness at the front and rear edges in the inwardly recessed region. In the protective case for mobile device, the inner frame can have at least one skirt portion, and the skirt portion airtightly connects the keys and the body. In the protective case for mobile device, the engagement means can be fusion. In the protective case for mobile device, the frame can have a plurality of protruding portions, each protruding portion protrudes from the inner circumferential surface of the frame, a free end of each protruding portion forms at least one abutting surface, and the abutting surface interferingly engages with the outer circumferential surface of the body. In the protective case for mobile device, the interference amount between the abutting surface and the outer circumferential surface of the body is about 0.1-0.3 mm. In the protective case for mobile device, the free end of the support portion interferingly engages with the inner circumferential surface of the frame. In the protective case for mobile device, the interference amount between the free end of the support portion and the inner circumferential surface of the frame is about 0.4-1 mm. In the protective case for mobile device, the position of the free end of the support portion abutting against the inner circumferential surface of the frame is not subjected to the engagement means.In the protective case for mobile device, the body of the inner frame has an inner annular surface, the inner annular surface defines a space for accommodating the mobile device, the mobile device has two opposite long sides and two opposite short sides, any two adjacent long side and short side extend to intersect at an intersection point, a line passing through the center of mass of the mobile device and any one of the intersection points is a center of mass line, the support portion can be located at a corner of the body, a middle position of the support portion can be located between two center of mass lines, and is closer to two sides of the inner frame in the longitudinal direction. In the protective case for mobile device, two offset lines respectively pass through the center of mass and respectively make an angle of 20 degrees with the center of mass line, two extension lines are respectively orthogonal to the two offset lines, and are tangent to the outer peripheral surface of the frame body at two tangent points, and the two tangent points are both located within the range of the support portion projected on the outer peripheral surface. In the protective case for mobile device, the two tangent points are respectively located at the boundary of the range of the free end of the support portion projected on the outer peripheral surface. In the protective case for mobile device, the number of support portions can be multiple, and are respectively located at each corner of the body. In the protective case for mobile device, the support portion can have opposite long and short end edges, the support portion is connected to the outer annular surface of the body by the long end edge, and the short end edge is located at the free end of the support portion. In the protective case for mobile device, the long end edge of the support portion has a first span, the short end edge of the support portion has a second span, and the ratio of the first span to the second span is about 3:2. In the protective case for mobile device, the collapse space can be a plurality of holes provided in the support portion. In the protective case for mobile device, the number of holes can be three, one of which is closer to the free end of the support portion, and the other two are farther away from the free end of the support portion. In the protective case for mobile device, each hole has a maximum hole width, each hole can have a solid material area around it, the edge of the solid material area to the hole edge has a spacing, and the ratio of the spacing to the maximum hole width is about 0.62-0.93. In the protective case for mobile device, the maximum hole width of the hole is about 1-1.5 mm. In the protective case for mobile device, the hole can be an arc-shaped elongated hole. In the protective case for mobile device, the collapse space can be a plurality of slits provided in the support portion, and each slit extends from the free end of the support portion to the body. In the protective case for mobile device, the radius of curvature of the corner of the frame body can be smaller than the radius of curvature of the corner of the body. In the protective case for mobile device, the maximum distance between the corner of the frame body and the corner of the body is about 4 mm or more.The inner frame of the mobile device protective case includes a body and at least one support portion. The body has an inner annular surface and an outer annular surface, and defines a chamber adapted to accommodate a mobile device by being surrounded by the inner annular surface. The support portion is connected to the outer annular surface of the body, and is provided with a collapse space. In the above-mentioned inner frame, the inner frame can have a plurality of protrusions connected to the outer annular surface of the body and located on both sides of the body in the transverse direction, and the plurality of protrusions are adapted to engage with the frame body of the outer frame. In the above-mentioned inner frame, part of the air chamber can be filled by the protrusions to form a plurality of air-tight buffer air bags in the air chamber. In the above-mentioned inner frame, the inner frame can have a plurality of keys located on at least one side of the body in the transverse direction, and the protrusions of each protrusion can protrude from the body by a greater amplitude than the keys. In the above-mentioned inner frame, the support portion, the protrusions and the keys of the inner frame can be integrally connected with the body. In the above-mentioned inner frame, the inner frame can have at least one skirt portion that is air-tightly connected to the keys and the body. In the above-mentioned inner frame, 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 centroid line is a line passing through the centroid of the mobile device and any one of the intersection points, the support portion can be located at a corner of the body, and the middle position of the support portion can be located between two centroid lines and closer to both sides of the inner frame in the longitudinal direction. In the above-mentioned inner frame, the number of support portions can be multiple and located at each corner of the body. In the above-mentioned inner frame, the support portion can have opposite long and short end edges, the support portion is connected to the outer annular surface of the body by the long end edge, and the short end edge is located at the free end of the support portion. In the above-mentioned inner frame, the long end edge of the support portion has a first span, the short end edge of the support portion has a second span, and the ratio of the first span to the second span is about 3:20. In the above-mentioned inner frame, the collapse space can be a plurality of holes provided in the support portion. In the above-mentioned inner frame, the number of holes can be three, one of which is closer to the free end of the support portion, and the other two are farther away from the free end of the support portion.In the inner frame, each hole has a maximum slot width, each hole can have a solid material area, the edge of the solid material area to the hole edge has a spacing, the ratio of the spacing to the maximum slot width is about 0.62-0.93. In the inner frame, the maximum slot width of the hole is about 1-1.5 mm. In the inner frame, the collapse space can be a plurality of cut slots provided on the support portion, each cut slot extends from the free end of the support portion to the body. Accordingly, the mobile device protective case can form a shock absorbing structure at a position prone to falling impact to provide moderate support and buffering effect, effectively dispersing and absorbing impact force, and improving the falling protection effect of the mobile device. BRIEF DESCRIPTION OF DRAWINGSIn order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Fig. 1 is a perspective exploded structural schematic view of a first embodiment of the mobile device protective case and a mobile device. Fig. 2 is a perspective exploded structural schematic view of the first embodiment of the mobile device protective case. Fig. 3 is a sectional view along line A-A in Fig. 1. Fig. 4 is an enlarged view of region B in Fig. 3. Fig. 5 is a partial enlarged view of Fig. 4, and the outer frame is omitted. Fig. 6 is a sectional view along line C-C in Fig. 3. Fig. 7 is an enlarged view of region D in Fig. 3. Fig. 8 is a perspective structural schematic view of the inner frame of the first embodiment, wherein the area represented by fine dots in the figure is the inner frame adapted to be engaged with the outer frame. Fig. 9 is a schematic view of the mobile device protective case and the mobile device falling at a corner. Fig. 10 is a partial enlarged view of Fig. 9. Fig. 11 is a perspective exploded structural schematic view of a second embodiment of the mobile device protective case and a mobile device. Fig. 12 is a perspective sectional structural schematic view of the upper outer frame of the second embodiment. Fig. 13 is a perspective sectional structural schematic view of the lower outer frame of the second embodiment. Fig. 14 is a top structural schematic view of the second embodiment of the mobile device protective case. Fig. 15 is a sectional view along line E-E in Fig. 14. Fig. 16 is a sectional view along line F-F in Fig. 14. Fig. 17 is a partial perspective structural schematic view of a third embodiment of the mobile device protective case. Fig. 18 is a top structural schematic view of the upper inner frame of a fourth embodiment, and a first cut slot style is shown. Fig. 19 is a side structural schematic view of the upper inner frame of the fourth embodiment, and a second cut slot style is shown. Fig. 20 is a perspective exploded structural schematic view of a fifth embodiment of the mobile device protective case.FIG. 21 is a side view of a fifth embodiment of the mobile device protective case of the present application. FIG. 22 is a cross-sectional view taken along line G-G of FIG. 21. FIG. 23 is a perspective view of a lower mobile device protective case of the fifth embodiment of the present application. FIG. 24 is a cross-sectional view taken along line H-H of FIG. 22. FIG. 25 is an enlarged view of region I of FIG. 22. Reference numerals

[0002] I inner frame

[0003] I I main body

[0004] I I I inner annular surface

[0005] 112 outer annular surface

[0006] 113 front annular edge 114 rear annular edge

[0007] 115 peripheral wall

[0008] 116 abutment surface

[0009] 117 side edge

[0010] 12 support portion

[0011] 121 long end edge

[0012] 122 short end edge

[0013] 13 collapse space

[0014] 13a hole

[0015] 13b split groove

[0016] 14 protrusion

[0017] 15 key

[0018] 16 inner plate

[0019] 17 skirt portion

[0020] 2 outer frame

[0021] 21 frame body

[0022] 21 1 inner peripheral surface

[0023] 212 outer peripheral surface

[0024] 213 rear annular edge

[0025] 214 protruding portion

[0026] 2141 abutment surface

[0027] 215 roughened portion

[0028] 216 inwardly retracted region

[0029] 22 back plate

[0030] 221 thin region 3 cushion air bag

[0031] D distance

[0032] D1 first span

[0033] D2 second span

[0034] D3 third span

[0035] L0 ground

[0036] L1 center line

[0037] L2 eccentric line

[0038] L3 extension line

[0039] M moving device

[0040] Ml display screen

[0041] M2 short side

[0042] M3 long side

[0043] Pl center of mass

[0044] P2 point of tangency

[0045] R raw material region

[0046] SI chamber

[0047] S2 air chamber

[0048] T1, T2, T3 thickness

[0049] W maximum slot width DETAILED DESCRIPTION In the following, the action device protective case and the inner frame thereof according to the embodiments of the present application will be further described with reference to the accompanying drawings. The foregoing and other technical contents, features and effects of the present application will be clearly presented in the following detailed description of the preferred embodiments with reference to the accompanying drawings. It is worth mentioning that the quantifier "one" or "a" is used throughout the present application only for the convenience of use and to provide the general meaning of the scope of the present application; in the present application, it should be interpreted as including one or at least one, and the single concept also includes the case of plurality, unless it is obviously intended to mean otherwise. The approximate terms such as "combine", "combine" or "assemble" described throughout the present application mainly include the type that the components can be separated without damaging the components after being connected, or the type that the components cannot be separated after being connected, which can be selected by the person skilled in the art according to the material of the components to be connected or the assembly requirements. In addition, in the following embodiments, the same or similar components will use the same or similar reference numerals. The action device protective case of the present application is suitable for being sleeved on an action device M (indicated in FIG. 1), which may, for example but not limited to, be a mobile phone, a tablet computer, an electronic book reader, a personal digital assistant, a smart watch or a wireless charging box for earphones, etc.; although the following listed embodiment figures are presented by taking the action device protective case for a mobile phone as an example, the present application is not limited thereto. Please refer to FIG. 1 and FIG. 2, which are the first embodiment of the action device protective case of the present application, which includes an inner frame 1 and an outer frame 2, and the outer frame 2 covers the inner frame 1. Among them, the action device M takes a non-folded upright mobile phone as an example, which usually has a display screen Ml, a side edge and a back side, the display screen Ml is opposite to the back side, and the side edge can be connected between the display screen Ml and the back side. When the action device protective case is assembled on the action device M, the inner frame 1 can at least surround the side edge of the action device M. The present application can select the direction perpendicular to the plane of the display screen Ml as the Z direction, and the place where the display screen Ml is located is the front direction, and the place where the back side is located is the back direction. The side edge of the action device M has two pairs of opposite edges, one pair of opposite edges is perpendicular to the other pair of opposite edges, and the opposite directions of the two pairs of opposite edges are both perpendicular to the Z direction. In one embodiment of the present application, one pair of opposite edges is two short edges M2 of the side edge, and the direction perpendicular to the two short edges M2 is defined as the Y direction; the other pair of opposite edges is two long edges M3 of the side edge, and the direction perpendicular to the two long edges M3 is defined as the X direction. In some embodiments, the side edge of the action device M does not necessarily have long and short edges.Please refer to FIG. 1 to FIG. 3, the inner frame 1 has a body 11 and at least one support portion 12o, the body 11 has an inner annular surface 111 and an outer annular surface 112, and is surrounded and defined by the inner annular surface 111 to form a cavity S1 suitable for accommodating the mobile device M. The support portion 12 is connected to the outer annular surface 112, and the support portion 12 is provided with a collapse space 13o. The outer frame 2 is connected to the inner frame 1 by a joint means, and the outer frame 2 has a frame body 21, the frame body 21 has an inner peripheral surface 211 and an outer peripheral surface 212, and the inner peripheral surface 211 of the frame body 21 is spaced from the outer annular surface 112 of the body 11 to form an air chamber S2o. In the present embodiment, when the mobile device M with the mobile device protective shell falls, the impact force generated by the contact with the ground is transmitted inward through the frame body 21 of the outer frame 2, such as the impact near the support portion 12 of the inner frame 1, most of the impact force is applied to the support portion 12. In 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, and in the transmission process, the collapse space 13 on the support portion 12 can be buffered and dissipated, and the impact force is weakened in the support portion 12, and finally transmitted to the body 11 on both sides to be evenly dissipated, which can effectively avoid the concentration of impact force to the mobile device M and cause damage. On the other hand, the remaining impact force that is not transmitted to the support portion 12 can be dissipated by the support and buffering effect provided by the air chamber S2 to the frame body 21, and even if the frame body 21 still deforms to touch the body 11 of the inner frame 1, the part of the impact force can also be transmitted along the body 11 to be evenly dissipated. Therefore, the mobile device protective shell of the present embodiment can form a shock-absorbing structure at the place prone to falling impact by means of the support portion 12 provided in the air chamber S2 and the collapse space 13 provided in the support portion 12, to provide moderate support and buffering and dissipation effect, effectively disperse and absorb the impact force, and improve the falling protection effect of the mobile device M. Please refer to FIG. 2 and FIG. 3, in one embodiment of the present application, the number of support portions 12 can be multiple, and are respectively located at each corner of the body 11. For example, the cross section of the body 11 in the XY plane of the present embodiment can be approximately hollow rectangular, so the number of support portions 12 can be selected as four, and each corner of the body 11 is provided with a support portion 12.The present application is not limited to this, for example, in other embodiments, only two corners of the body 11 above can be provided with the support part 12, or only two corners of the body 11 below can be provided with the support part 12; in other words, the position of the support part 12 is preferably located at the corner of the body 11, but the number is not limited, the number and position of the support part 12 can be adjusted according to the overall structure or appearance of the mobile device protective shell, or even at the non-corner position of the body 11 in the transverse (X direction) or longitudinal (Y direction) direction. The support part 12 can be narrow at the free end and wide at the connection position of the body 11. For example, the support part 12 can form a trapezoidal shape with opposite long and short edges 121 and 122, which can be arc-shaped. The long edge 121 of the support part 12 is connected to the outer ring surface 112 of the body 11, and the short edge 122 is located at the free end of the support part 12. In the embodiment in which the support part 12 is integrally formed with the body 11, the long edge 121 is not visible to the naked eye, so it is shown as two dotted lines in Figure 4. The long edge 121 of the support part 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 part 12 has a second span D2 (i.e. the straight line distance between the two ends of the short edge 122), and the ratio of the first span D1 and the second span D2 is about 3:20. In this way, during the transmission of the impact force from the free end of the support part 12 to the connection position of the body 11, the free end of the support part 12 has a moderate but not too high rigidity due to its small force receiving area, and when transmitting the impact force inward, it can also improve the impact force dispersion effect with the gradually expanding cross-sectional area of the support part 12. In addition, in an embodiment of the present application, the radius of curvature of the corner of the frame 21 can be smaller than the radius of curvature of the corner of the body 11. In this way, the distance between the two corners can be increased to increase the impact force transmission path in a limited space, thereby further improving the impact force absorption effect of the mobile device protective shell. For example, but not limited to, the maximum distance between the corner of the frame 21 and the corner of the body 11 can be more than 4 mm.In the embodiment where the inner frame 1 has a plurality of support portions 12, the collapse spaces 13 of the plurality of support portions 12 can be the same or different, and the present application is not limited thereto. For example, in one embodiment of the present application, the collapse spaces 13 are a plurality of holes 13a provided in the support portions 12, and preferably through holes. The number of holes 13a provided in each of the support portions 12 can be the same or different. In this case, each hole 13a can substantially penetrate the support portion 12 in the Z direction, and the extension directions of the plurality of holes 13a provided in the same support portion 12 can be parallel or slightly inclined, provided that the plurality of holes 13a do not penetrate and communicate 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 application, the number of holes 13a provided in each support portion 12 can be three, and one of the holes 13a is closer to the free end of the support portion 12 (closer to the short end edge 122), and the other two holes 13a are farther from the free end of the support portion 12 (closer to the long end edge 121). Furthermore, as shown in FIG. 5, in the XY plane, each hole 13a has a maximum hole width W, and a solid material area R is maintained around each hole 13a, and the support portion 12 is not provided with holes or notches in the solid material area R. The edge of the solid material area R (for example, the two-dot chain line in FIG. 5) to the hole edge of the hole 13a has a distance D, and the ratio of the distance D to the maximum hole width W is 0.62-0.93; for example, the distance D is 1-1.5 mm, and the maximum hole width W is 1.6 mm. In this way, the support portion 12 can have moderate rigidity, and there is not too much collapse space, so that the support portion 12 can still be elastically restored to its original shape after falling several times, and will not be permanently deformed after falling one or two times, thereby improving the durability. For example, but not limited to, the maximum hole width W of the hole 13a can be about 1-1.5 mm, so as to balance the good moldability and the falling protection. The test results show that, under the same falling conditions, the cross-sectional shape of the hole 13a is circular, and the hole diameter (i.e., the maximum hole width W) is 1 mm, and the falling protection effect is better.Please refer to FIG. 1 to FIG. 3 again, in one embodiment of the present application, the inner frame 1 can also have a plurality of protrusions 14, which can be connected to the outer ring surface 112 of the body 11 and respectively located on both sides of the body 11 in the lateral direction (X direction), and the plurality of protrusions 14 can be engaged with or not engaged with the frame 21. In this way, the support effect on both sides of the frame 21 can be enhanced by the plurality of protrusions 14, so that the air chamber S2 can easily maintain a predetermined shape and rigidity. In addition, when the mobile device M is laterally dropped, most of the impact force can be buffered and dissipated by the air chamber S2, and the remaining impact force can be transmitted inward through the protrusions 14 located on the side to the body 11, so that the protection of the mobile device protective shell in lateral drop is also very good. Please refer to FIG. 3 and FIG. 6 again, in one embodiment of the present application, the shape of each protrusion 14 can be matched with the cross-sectional shape of the air chamber S2 at the corresponding position; that is, the air chamber S2 can be filled with the protrusions 14, so that two spaces are formed on both sides of the protrusions 14, and the gas in the two spaces is not easy to flow between each other through the protrusions 14. Therefore, as long as there is no hole connecting the chamber S1 or the outside between two adjacent protrusions 14 or between an adjacent protrusion 14 and a support portion 12, a relatively hard buffer air bag 3 can be formed to improve the impact force dissipation effect. In particular, when each protrusion 14 is engaged with the frame 21 in a fixed connection manner, the plurality of buffer air bags 3 can form a nearly airtight state, which helps to improve the anti-deformation ability of the plurality of buffer air bags 3 and the impact force dissipation effect. Please refer to FIG. 1, the plurality of buffer air bags 3 of the present embodiment are formed adjacent to the corresponding short side M2 of the body 11 of the mobile device M, but not limited thereto. Please refer to FIG. 1 to FIG. 3 again, in one embodiment of the present application, the inner frame 1 can have a plurality of keys 15, which are located on at least one side of the body 11 in the lateral direction (X direction) to correspond to a plurality of function keys of the mobile device M, such as power key or volume control key. Wherein, the protrusion of each protrusion 14 from the body 11 is greater than the protrusion of each key 15 from the body 11, and the plurality of keys 15 are not engaged with the outer frame 2, that is, each key 15 is spaced from the inner circumferential surface 211 of the frame 21 without contact. In this way, each key 15 will not be easily triggered by mistake when the frame 21 is deformed under stress.In some embodiments, the plurality of keys 15 can also only slightly touch the outer frame 2, or some of the plurality of keys 15 touch the outer frame 2, and some of the plurality of keys 15 do not touch the outer frame 2. It is worth mentioning that when the plurality of keys 15 are between two adjacent convex portions 14, the body 11 forms a broken hole at the plurality of keys 15, so that the plurality of keys 15 do not form an airtightness, that is, the plurality of keys 15 do not form the buffer air bag 3 between the two adjacent convex portions 14, so that even if the plurality of keys 15 need to be pressed by the frame body 21, the plurality of keys 15 will not have the problem of being difficult to be pressed and triggered. In addition, the plurality of support portions 12, the plurality of convex portions 14 and the plurality of keys 15 of the inner frame 1 can be covered in the frame body 21, unlike the existing protective sleeve forming a type of exposed key, the mobile device protective case of the present embodiment not only has a unique and simple appearance, but also protects the plurality of keys 15 from being scratched or falling off. Please refer to FIG. 2 and FIG. 7, in one embodiment of the present application, the thickness (meat thickness T1 on the XY plane) of the frame body 21 at the plurality of keys 15 is thinner than other parts. In this way, not only can the distance between each key 15 and the inner circumferential surface 211 of the frame body 21 be widened, thereby reducing the probability of mistakenly triggering the key 15, but also the frame body 21 can be formed to be softer and easier to press and deform at the plurality of keys 15, so that when a user presses the key 15 through the frame body 21, the user can have the feeling of pressing an air cushion, and the key 15 is not difficult to trigger. In addition, the support portion 12, the convex portion 14 and the key 15 of the inner frame 1 can be integrally formed with the body 11 to improve the manufacturing convenience of the inner frame 1. Please refer to FIG. 1 and FIG. 2, in one embodiment of the present application, the outer frame 2 can be transparent or translucent, so that the color of the inner frame 1 can be seen from the outside, the appearance of the inner frame 1 can be seen from the outside, a layered appearance can be formed, and the positions of the plurality of keys 15 can be easily identified. Specifically, the light transmittance of the outer frame 2 can be greater than the light transmittance of the inner frame 1, and the light transmittance of the inner frame 1 can be about 0-40%, so that the inner frame 1 can be seen from the outer frame 2, and a visual effect with an air cushion feeling can be created. In addition, please refer to FIG. 1 to FIG. 3, the engagement means for connecting the outer frame 2 and the inner frame 1 can be, for example but not limited to, gluing, welding or concave-convex cooperation, and the engagement strength of the welding is preferably high; and different engagement means can be included in all the engagement positions of the outer frame 2 and the inner frame 1.In one embodiment of the present application, the outer frame 2 can further comprise a back plate 22, which can be connected to the frame body 21 and cover all or part of the rear end of the frame body 21, that is, the back plate 22 can be placed outside the back side of the mobile device M to protect the back side of the mobile device M from being damaged. The back plate 22 can be provided with holes corresponding to functional parts of the mobile device M, such as camera holes or finger sensor holes. In one embodiment of the present application, the back plate 22 can be integrally connected to the rear end of the frame body 21 to improve the structural stability of the frame body 21 and facilitate and improve the positioning accuracy when welding the frame body 21 and the inner frame 1, thereby improving the welding quality of the two. Please refer to FIG. 3 and FIG. 8, wherein the area shown by the fine sand points in FIG. 8 is the joint between the inner frame 1 and the outer frame 2. That is, the front circumferential edge 113 of the body 11 of the inner frame 1 in the Z direction is connected to the frame body 21 of the outer frame 2. Please refer to FIG. 6, for example, the rear circumferential edge 213 of the free end of the frame body 21 is abutted against the front circumferential edge 113 of the body 11 in the Z direction, and the rear circumferential edge 114 of the body 11 of the inner frame 1 is connected to the frame body 21 or the back plate 22 of the outer frame 2. The plurality of protrusions 14 of the inner frame 1 are connected to the inner circumferential surface 211 of the frame body 21 of the outer frame 2. In other embodiments, the plurality of protrusions 14 can not be connected to the inner circumferential surface 211 of the frame body 21. Please refer to FIG. 1, FIG. 3 and FIG. 8, the lower end of the body 11 of the inner frame 1 in the Y direction is also connected to the inner circumferential surface 211 of the frame body 21 of the outer frame 2. Since the lower end of some mobile devices M is provided with sound holes, charging holes, data transmission holes or stylus receiving holes, in one embodiment of the present application, the body 11 of the inner frame 1 can be provided with a plurality of functional holes at the lower end, and the lower end of the body 11 can further be provided with a protruding circumferential wall 115 around the plurality of functional holes to connect the inner circumferential surface 211 of the frame body 21 by the circumferential wall 115. In addition, the functional holes and the circumferential wall 115 can be arranged according to the number and position of the sound holes, charging holes, data transmission holes or stylus receiving holes, or adjacent functional holes can share the circumferential wall 115, and part of the circumferential wall 115 can be connected to the inner circumferential surface 211 of the frame body 21 on one side in the front and rear directions, so that the circumferential wall 115 and the adjacent protrusion 14 can form an independent buffer air bag 3.In more detail, the peripheral wall 115 can be formed with an abutment surface 116 on one side of the front-to-rear (Z) direction, which can abut the lower end of the peripheral wall 115 in the Y direction and the front circumferential edge 113 (or the rear circumferential edge 114). Please refer to FIG. 2, the abutment surface 116 can be arc-shaped to conform to the inner circumferential surface 211 of the frame 21. On the other hand, please refer to FIG. 4, the free end of the support portion 12 can be interference fit with the inner circumferential surface 211 of the frame 21. In an embodiment of the present application, the interference amount between the free end of the support portion 12 and the inner circumferential surface 211 of the frame 21 is about 0.4-1 mm, and the interference amount in this embodiment is about 0.4-1 mm, so that the two can be tightly abutted and provide a preload effect. In addition, the structure at the joint of the inner frame 1 and the outer frame 2 can have a small amount of interference by default, to ensure that the outer frame 2 fits the inner frame 1, and the structure or part of the structure can effectively apply the aforementioned joint means. It is worth mentioning that in this embodiment, the position where the free end of the support portion 12 abuts against the inner circumferential surface 211 of the frame 21 is not applied with the joint means, which aims to avoid the mobile device protective case from forming excessive rigidity at the position corresponding to the support portion 12; in other embodiments, the interference amount between the free end of the support portion 12 and the inner circumferential surface 211 of the frame 21 can be adjusted (for example, the interference amount is reduced or adjusted to a non-interference state), and the joint means is applied at the same time, which can also achieve the purpose of avoiding excessive rigidity while having a combination of strength. Please refer to FIG. 1, FIG. 3 and FIG. 9, taking the mobile device M matched with the mobile device protective case shown in this embodiment as an example, the mobile device M has two opposite long sides M3 and two opposite short sides M2, and any two adjacent long sides M3 and short sides M2 can extend to intersect at an intersection point. One diagonal line passes through one set of diagonally located two intersection points, and the other diagonal line passes through the other set of diagonally located two intersection points, and the intersection of the two diagonal lines is the center of mass P1 of the mobile device M. Hereinafter, the line passing through the center of mass P1 and any aforementioned intersection point is referred to as the center of mass line L1. Please refer to FIG. 9, since the mobile device M falls and lands in a corner, the present application will be described based on the case where one of the center of mass lines L1 is orthogonal to the ground L0 when the mobile device M falls.In an embodiment of the present application, the support portion 12 is located at a corner of the body 11, and the middle position (or most of the volume) of the support portion 12 can be located between the two centroid lines L1 and closer to the two sides of the inner frame 1 in the longitudinal direction (Y direction) (also known as the top and bottom sides, corresponding to the short side M2 of the mobile device M). In this way, the support portion 12 of the present embodiment can avoid excessive rigidity due to too large a volume, and achieve better drop protection effect under limited volume constraints. For more details, please refer to Figures 9 and 10. Two offset lines L2 pass through the centroid P1 respectively, and are each at an angle of 20 degrees with the centroid line L1 orthogonal to the ground L0. That is, the two offset lines L2 are respectively the drop paths with a 20-degree left or right offset during the drop. Two extension lines L3 are each orthogonal to the two offset lines L2 and tangent to the outer peripheral surface 212 of the frame body 21 at two tangent points P2, and the two tangent points P2 are both located within the range of the support portion 12 projected on the outer peripheral surface 212. Preferably, the two tangent points P2 are respectively located on the range boundary of the free end of the support portion 12 projected on the outer peripheral surface 212. In this way, the mobile device protective case can ensure that the drop points are aligned to the support portion 12 within the 20-degree left and right offset range of the centroid line L1, to provide the best drop protection effect. Please refer to Figures 1 to 3. In an embodiment of the present application, 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 process. In this way, the recycling efficiency is improved and the recycling cost is reduced. For example, but not limited to, the inner frame 1 and the outer frame 2 can both be made of thermoplastic elastomer (TPE) material, especially recycled TPE obtained from recycled materials. In addition, in an embodiment of the present application, the inner surface of the back plate 22 can have a thin area 221 below, and the thickness of the back plate 22 at the thin area 221 is thinner, to form an area for placing a hanging piece, to avoid the thickness of the hanging piece causing the mobile device M and the mobile device protective case to fail to accurately align and combine, and the hooking portion of the hanging piece can pass through the frame body 21 for combination with a matching mobile phone strap or hanging rope. In addition, in an embodiment of the present application, the air chamber S2 can also contain a plurality of buffer particles or at least one decorative piece.As such, the mobile device protective case of the present embodiment can enhance the cushioning effect by means of the plurality of cushioning particles, or enhance the diversity of the overall appearance by means of the plurality of cushioning particles or the ornaments, provide the function of customized design, and enhance the willingness of consumers to select and purchase. Please refer to FIG. 11, which is a second embodiment of the mobile device protective case of the present application. The present embodiment is substantially the same as the first embodiment described above, and the main difference is that the frame 21 of the present embodiment can have a plurality of abutting portions 214 protruding from the inner circumferential surface 211 of the frame 21, adapted to abut against the outer annular surface 112 of the body 11. In detail, please refer to FIGS. 11 and 12. In one embodiment of the present application, on the side of the frame 21 without holes, for example, corresponding to the long side M3 side of the mobile device M, the abutting portion 214 can extend in a long strip shape on the inner circumferential surface 211, and the cross section of the abutting portion 214 can be approximately C-shaped, so that the free end of the abutting portion 214 can form two abutting surfaces 2141 spaced apart in the Z direction. Please also refer to FIGS. 11 and 13. On the side of the frame 21 with holes, for example, corresponding to the short side M2 side of the mobile device M, the abutting portion 214 can be in a short strip shape, and the abutting portion 214 can be formed on both sides of the hole in the Z direction. In addition, the free end of each abutting portion 214 can form an abutting surface 2141, which can also form two abutting surfaces 2141 spaced apart in the Z direction. Please refer to FIGS. 14 to 16. When the inner frame 1 is assembled into the frame 21 of the outer frame 2, each abutting surface 2141 can abut against or interfere with the outer annular surface 112 of the body 11, to form stable support for the outer annular surface 112 of the body 11. As such, when the inner frame 1 and the outer frame 2 are to be fusion bonded, the inner frame 1 can be pushed outward from the inside by a jig placed in the chamber S1, so that the outer annular surface 112 of the body 11 can be maintained in close abutment with each abutting surface 2141. As for the part shown in FIG. 15, the abutting surface 2141 can also serve as the abutting surface of the front annular periphery 113 and the rear annular periphery 114 of the body 11 in the X direction; as for the part shown in FIG. 16, the abutting surface 2141 can also serve as the abutting surface of the front annular periphery 113 and the rear annular periphery 114 of the body 11 in the Y direction. Therefore, each abutting portion 214 can stably stop the body 11, so that the body 11 cannot move outward too much, thereby ensuring that the body 11 can be maintained at a predetermined position for fusion bonding, and the parts to be fusion bonded between the inner frame 1 and the outer frame 2 can be in close abutment, thereby effectively improving the fusion bonding quality of the inner frame 1 and the outer frame 2.For example, but not limited to, the interference amount of the abutting 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. It is worth mentioning that in the embodiment where the body 11 has the plurality of protrusions 14, the length of the protruding abutting portion 214 can extend close to the protrusions 14, and preferably the side edge of the protruding abutting portion 214 does not contact the protrusions 14, so as not to affect the engagement between the protrusions 14 and the inner circumferential surface 211 of the frame 21. In some embodiments, the side edge of the protruding abutting portion 214 can also be configured to contact the protrusions 14. Please refer to FIG. 15 and FIG. 16, in an embodiment of the present application, the back plate 22 of the outer frame 2 can form a protruding portion 222 on the inner surface, which is adjacent to the frame 21 and separated from the protruding abutting portion 214 by a predetermined distance, so as to form a groove between the protruding portion 222 and the protruding abutting portion 214 to accommodate the rear annular edge 114 of the body 11, which helps to improve the stability of the body 11 arranged in the outer frame 2. In addition, please refer to FIG. 11, in an embodiment of the present application, the outer circumferential surface 212 of the frame 21 can be provided with a plurality of rough portions 215, which are respectively located on the plurality of keys 15 of the inner frame 1. In this way, the plurality of rough portions 215 can provide a tactile sensation with recognition, so that the user can find the position corresponding to the key 15 by touch to press and trigger. For example, but not limited to, the outer circumferential surface 212 can be knurled or polished in part to form the rough portions 215; or, in an embodiment of the present application, the rough portions 215 can be protrusions protruding from the outer circumferential surface 212, the pattern of the protrusions can be, for example, long strips, particles or specific patterns, and the height of the rough portions 215 protruding from the outer circumferential surface 212 is about 0.15 mm, so as to provide a better tactile sensation and recognition. Please refer to FIG. 17, which is a third embodiment of the mobile device protective case of the present application. This embodiment is basically the same as the first embodiment described above, the main difference is that the lower end of the body 11 of the inner frame 1 of this embodiment can be provided with an elongated opening, so that the body 11 is not formed in a complete annular shape, but forms a partially open shape at the lower end of the body 11. The body 11 can be arranged to cover at least one of the sound hole, the charging hole, the data transmission hole and the stylus receiving hole of the mobile device M (indicated in FIG. 1).The inner periphery surface 211 of the frame body 21 of the outer frame 2 can be engaged with the side edge 117 of the long-shaped opening of the lower end of the main body 11, and can also form an independent airbag 30 between the adjacent protruding portion 14. In addition, the inner frame 1 of the present embodiment can further include an inner plate 16, which is integrally formed on the rearward end of the main body 11 and cooperates with the main body 11 to define the accommodating chamber S1, so that the accommodating chamber S1 is open forwardly. In this way, even if the main body 11 does not form a complete ring, the structural stability of the inner frame 1 can be improved by means of the inner plate 16, so as to improve the engagement quality of the inner frame 1 and the outer frame 2. Please refer to FIG. 18 and FIG. 19, which are the fourth embodiment of the mobile device protective case of the present application. The present embodiment is basically the same as the first embodiment described above, and the main difference lies in the type of the collapse space 13 of the inner frame 1. In detail, the support portion 12 of the present embodiment can have a plurality of cut grooves 13b, so as to form the collapse space 130 of the support portion 12 by means of the plurality of cut grooves 13b. Each cut groove 13b extends from the free end of the support portion 12 to the main body 11. In the embodiment shown in FIG. 18, the cut groove 13b can be selected to penetrate the surface of the support portion 12 in the Z direction; or in the embodiment shown in FIG. 19, the cut groove 13b can be selected to penetrate the surface of the support portion 12 in the XY plane. Please refer to FIG. 20, which is the fifth embodiment of the mobile device protective case of the present application. The present embodiment is basically the same as the second embodiment described above, and the main difference lies in the structure of the frame body 21 of the outer frame 2, which is easier to be pressed and deformed to trigger the keys 15 of the inner frame 1. In detail, please refer to FIG. 20 to FIG. 24, the frame body 21 of the present embodiment can have at least one recessed area 216 located at the plurality of keys 15; in the recessed area 216, the front and rear side edges of the frame body 21 have a thinner thickness T2. In other words, as shown in FIG. 21 and FIG. 24, in the XZ plane, the thickness T2 of the frame body 21 at the recessed area 216 (especially adjacent to two opposite positions in the Z direction, i.e. adjacent to the front side edge and the rear side edge of the frame body 21) can be thinner than the thickness of other positions of the frame body 21 in the Y direction. In this way, the flexibility of the frame body 21 at the recessed area 216 of the present embodiment is improved, so as to form a softer and easier-to-press-and-deform position, so that the user can accurately trigger the keys 15 located within the range of the recessed area 216 by applying moderate force.Furthermore, the inner recess 216 and the side edges of other parts also form a recognizable touch, so that the user can quickly find the inner recess 216 by touch, and accurately find the position corresponding to the key 15 in combination with the rough parts 215 to press and trigger, so that the frame 21 of the embodiment can provide better operation touch and convenience. Please refer to FIG. 20, FIG. 22 and FIG. 23, as described above, the frame 21 of the embodiment can improve the flexibility of the frame 21 by providing the inner recess 216, so that the inner frame 1 of the embodiment can also be selected to have at least one skirt 17, which airtightly connects the key 15 and the body Ik. In this way, even if the inner frame 1 has water vapor in the chamber S1, the water vapor will not penetrate into the air chamber S2 between the inner frame 1 and the outer frame 2, causing fog between the inner frame 1 and the outer frame 2 to affect the appearance. Please refer to FIG. 20 and FIG. 24, the skirt 17 of the embodiment can form a convex arc shape, and the key 15 is connected to the outermost convex part of the skirt 17. The skirt 17 is preferably made a little thinner, especially at the part adjacent to the key 15, to have higher flexibility, so that when the key 15 is pressed, it can cause elastic deformation of the skirt 17, so that the key 15 can smoothly displace to the chamber S1 of the inner frame 1 to trigger the key of the mobile device M (indicated in FIG. 1). For example, the thickness T3 of the skirt 17 can adopt the thinnest degree that can be achieved in the injection molding process (currently about 0.6 mm, but not limited thereto). In addition, the thickness T3 of the skirt 17 can increase from the part connected to the key 15 to the part connected to the body 11, for example, the thickness T3 of the skirt 17 is about 0.7 mm at the part connected to the body 11, so as to avoid the shrinkage deformation problem commonly seen in the injection molding process at the part connected to the body 11. In addition to the above method of making the thickness T3 of the skirt 17 thin, in other embodiments, a notch can be provided at the part of the skirt 17 connected to the key 15 (whether the notch is machined from the inside or the outside of the skirt 17), so that the key 15 can smoothly trigger the key of the mobile device M.Also, the third span D3 of the skirt 17 in the Z direction is preferably wide, which helps to improve the flexibility of the skirt 17; it is worth mentioning that the inner side of the body 11 still has sufficient thickness to stably support the mobile device Mo. It is worth mentioning that, referring to FIGS. 20 and 22, the plurality of protrusions 14 of the inner frame 1 of the present embodiment can each have a wide bottom (at the outer annular surface 112 of the body 11) to provide good lateral drop protection, and each protrusion 14 can or can not be engaged with the frame 21, which is not limited by the present application. Referring to FIGS. 20 and 25, the present embodiment further provides different types of collapse space 13 of the inner frame 1. In the present embodiment, the collapse space 13 is a plurality of holes 13a provided in the support portion 12, and each hole 13a can form an elongated hole with arc-shaped ends. In this way, after the mobile device protective case is dropped several times, each hole 13a is still not prone to permanent collapse deformation, which has the effect of improving durability. For example but not limited to, in one embodiment of the present application, the number of holes 13a can be three, the middle hole 13a is provided at the middle position of the support portion 12, and the long axis direction thereof is approximately parallel to the direction extending from the free end of the support portion 12 to the compartment S1, and the long axis directions of the two side holes 13a are approximately parallel to the two inclined side edges of the support portion 12, to have both durability and aesthetics. In other embodiments, the long axis directions of the two side holes 13a can each be parallel to the long axis direction of the middle hole 13a, or respectively form an included angle of less than 60 degrees with the long axis direction of the middle hole 13a. The above-described is only an embodiment of the present application, which is not intended to limit the patent scope of the present application.

Claims

CLAIM 1. A protective case for a mobile device, characterized in that, The application relates to a frame structure, comprising: an inner frame having a body and at least one support part connected to the outer circumferential surface of the body, the support part being provided with a collapse space; and an outer frame connected to the inner frame by a joint means, the outer frame having a frame body, the inner circumferential surface of the frame body being spaced apart from the outer circumferential surface of the body to form an air chamber. The light transmittance of the outer frame is greater than that of the inner frame.

2. The case of claim 1, wherein: The light transmittance of the inner frame is 0-40%. ​ 3. The case of claim 2, wherein: The inner frame has a plurality of convex parts connected to the outer circumferential surface of the body and located on both sides of the body in the transverse direction, and the plurality of convex parts are connected to the frame body. ​ 4. The case of claim 1, wherein: The air chamber is partially filled with the convex parts to form a plurality of air-tight buffer air bags in the air chamber. ​ 5. The case of claim 4, wherein: The inner frame has a plurality of keys located on at least one side of the body in the transverse direction, and the amplitude of each convex part protruding from the body is greater than the amplitude of the keys protruding from the body. ​ 6. The case of claim 4, wherein The support part, the convex part and the key of the inner frame are integrally connected to the body.

7. The case of claim 6, wherein: The plurality of keys are not connected to the outer frame, and each key is spaced apart from the inner circumferential surface of the frame body without contact. ​ 8. The case of claim 6, wherein: The thickness of the frame body at the plurality of keys is thin. ​ 9. The case of claim 8, wherein: The outer circumferential surface of the frame body has a plurality of rough parts, and the plurality of rough parts are respectively located at the plurality of keys.

10. The protective case for an action device of claim 6, wherein, The rough part 11. The case of claim 10, wherein: The height of the convex part protruding from the outer circumferential surface of the frame body is 0.15 mm. 23 The frame body is provided with at least one inwardly-recessed area at the plurality of keys, and the thickness of the front and rear side edges of the frame body is thin in the inwardly-recessed area.

12. The protective case for mobile devices of claim 6, wherein The inner frame has at least one skirt part, and the skirt part is air-tightly connected to the key and the body.

13. The case of claim 12, wherein: The joint means is fusion.

14. The case of claim 1, wherein: The frame body has a plurality of convex abutting parts, each convex abutting part protruding from the inner circumferential surface of the frame body, and the free end of each convex abutting part is provided with at least one abutting surface, and the abutting surface interferes with the outer circumferential surface of the body. ​ 15. The case of claim 14, wherein: The interference amount of the abutting surface and the outer circumferential surface of the body is 0.1-0.3 mm. ​ 16. The case of claim 15, wherein: The free end of the support part interferes with the inner circumferential surface of the frame body. ​ 17. The protective case for mobile devices of claim 1, wherein The interference amount of the free end of the support part and the inner circumferential surface of the frame body is 0.4-1 mm.

18. The case of claim 17, wherein: The position of the free end of the support part abutting against the inner circumferential surface of the frame body is not subjected to the joint means.

19. The case of claim 17, wherein: The body of the inner frame has an inner circumferential surface, the inner circumferential surface is surrounded to define a containing chamber suitable for containing 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, a line passing through the center of mass of the mobile device and any one of the intersection points is a center-of-mass line, the support part is located at a corner of the body, the middle position of the support part is located between two center-of-mass lines, and is closer to the two sides of the inner frame in the longitudinal direction.

20. The protective case for mobile devices of claim 1, wherein Two eccentric lines respectively pass through the center of mass and respectively make an angle of 20 degrees with the center-of-mass line, two extension lines are respectively orthogonal to the two eccentric lines, and the outer circumferential surface of the frame body is tangent to two tangent points, and the two tangent points 21. The case of claim 20, wherein: ​ ​ The support portion projects within the range of the outer circumferential surface.

22. The protective case for a mobile device of claim 21, wherein: The two intersection points are located at the range boundary of the free end of the support portion projected on the outer circumferential surface. ​ 23. The case of claim 1, wherein: The number of the support portions is multiple, and each of the support portions is located at a corner of the body. ​ 24. The case of claim 1, wherein: The support portion has opposite long end edges and short end edges, the long end edges of the support portion connect the outer circumferential surface of the body, and the short end edges are located at the free end of the support portion. ​ 25. The case of claim 24, wherein: The long end edges of the support portion have a first span, the short end edges of the support portion have a second span, and the ratio of the first span to the second span is 3:

20. ​ 26. The case of claim 1, wherein: The collapse space is a plurality of holes provided in the support portion. ​ 27. The case of claim 26, wherein: The number of the holes is three, one of which is closer to the free end of the support portion, and the other two are farther away from the free end of the support portion. ​ 28. The case of claim 26, wherein: The holes have a maximum slot width, and each hole has a solid material area around it, the edge of the solid material area to the hole rim has a spacing, the ratio of the spacing to the maximum slot width is 0.62-0.93 O ​ 29. The case of claim 28, wherein: The maximum hole width of the holes is 1-1.5 mm. ​ 30. The case of claim 26, wherein: The holes are arc-shaped elongated holes. ​ 31. The protective case for mobile devices of claim 1, wherein The collapse space is a plurality of section grooves provided in the support portion, and each section groove extends from the free end of the support portion to the body.

32. The case of 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 body.

33. The case of claim 32, wherein: The maximum distance between the corner of the frame and the corner of the body is more than 4 mm.

34. The case of claim 1, wherein The inner frame and the outer frame are made of thermoplastic elastomer material.

35. The sports equipment protective case of claim 1, wherein The outer frame has a back plate, the inner surface of the back plate has a thin area below, and the thickness of the back plate is thinner at the thin area.

36. The case of claim 1, wherein The air chamber contains a plurality of buffer particles or at least one ornament.

37. A protective case for a mobile device, characterized in that, Comprising: An inner frame having a body and a plurality of support portions connecting the outer circumferential surface of the body, and an outer frame connected to the inner frame by engagement means, the outer frame having a frame body, and the inner circumferential surface of the frame body being spaced from the outer circumferential surface of the body to form an air chamber.

38. An inner frame of a protective shell for a mobile device, characterized in that, Comprising: A body having an inner circumferential surface and an outer circumferential surface, and being circled by the inner circumferential surface to define a container suitable for accommodating a mobile device; And at least one support portion connecting the outer circumferential surface of the body, the support portion being provided with a collapse space.

39. The inner frame of a protective case for a mobile device according to claim 38, wherein: The inner frame has a plurality of protrusions connecting the outer circumferential surface of the body and being located on both sides of the body in the transverse direction, respectively, and the • plurality of protrusions are adapted to engage with the frame body of the outer frame. ​ 40. The inner frame of the protective case for mobile devices according to claim 39, wherein The inner frame has a plurality of keys located on at least one side of the body in the transverse direction, and the amplitude of each protrusion protruding from the body is greater than the amplitude of the • key protruding from the body.

41. The inner frame of the protective case for mobile devices according to claim 40, wherein The support portion, the protrusion, and the key of the inner frame are integrally formed with the body.

42. The inner frame of a protective case for an action device according to claim 40, wherein: The ​ 26 The inner frame has at least one skirt that airtightly connects the key and the body.

43. The inner frame of a protective case for an action device according to claim 38, wherein: 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 connecting the center of mass of the mobile device and any one of the • intersection points is a center of mass line, the support portion is located at a corner of the body, the middle position of the support portion is located between two center of mass lines, and is closer to the two sides of the inner frame in the longitudinal direction. ​ 44. The inner frame of the protective case for mobile devices according to claim 38, wherein The number of the support portions is plural, and each of the support portions is located at each corner of the body.

45. The inner frame of the protective case for mobile devices according to claim 38, wherein The support portion has opposite long end edges and short end edges, the support portion connects the outer circumferential surface of the body by the long end edges, and the short end edges are located at the free end of the support portion.

46. The inner frame of the protective case for mobile devices according to claim 45, wherein The long end edges of the support portion have a first span, the short end edges of the support portion have a second span, and the ratio of the first span to the second span is 3:

20.

47. The inner frame of a protective case for an action device according to claim 38, wherein: The collapse space is a plurality of holes provided in the support portion. ​ 48. The inner frame of the protective case for mobile devices according to claim 47, wherein The number of the holes is three, one of which is closer to the free end of the support portion, and the other two are farther away from the free end of the support portion.

49. The inner frame of the protective case for mobile devices according to claim 47, wherein Each hole has a maximum hole width, each hole has a solid material area around it, the edge of the solid material area to the hole edge has a spacing, and the ratio of the spacing to the maximum hole width is 0.62-0.

93.

50. The inner frame of the protective case for mobile devices according to claim 49, wherein The maximum hole width of the hole is 1-1.5 mm.

51. The inner frame of the protective case for mobile devices according to claim 38, wherein The collapse space is a plurality of cut grooves provided in the support portion, and each cut groove extends from the free end of the support portion to the body. 27

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