CN113905546A

CN113905546A - Mobile terminal protective housing

Info

Publication number: CN113905546A
Application number: CN202010640706.XA
Authority: CN
Inventors: 黄小凤; 余佳
Original assignee: Shenzhen Choton Zhuoyue Technology Co ltd
Current assignee: Shenzhen Choton Zhuoyue Technology Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2022-01-07
Anticipated expiration: 2040-07-06
Also published as: CN113905546B

Abstract

The invention relates to a mobile terminal protective shell, which comprises a main shell and a metal back frame: the main shell comprises a side frame and a lower cover, wherein the side frame is arranged on the outer edge of the lower cover in a surrounding mode, and the side frame and the lower cover jointly form an accommodating cavity for accommodating the mobile terminal; one side of the main shell, which is far away from the accommodating cavity, is provided with a groove, and the groove extends from the lower cover to the corner part of the side frame; the metal back frame is integrally formed and is embedded in the groove through a glue dispensing process or an embedding and injecting process. On one hand, the scratch-resistant and bending-resistant performance of the protective shell can be effectively improved, so that the protective shell is not easy to deform when being impacted by external force, and the mobile terminal is prevented from being separated from the protective shell when falling; on the other hand, the metal back frame can effectively disperse and absorb the impact force of the corner when the mobile terminal falls, so that the mobile terminal is prevented from being broken.

Description

Mobile terminal protective housing

Technical Field

The invention relates to the technical field of protective cases, in particular to a protective case of a mobile terminal.

Background

A mobile terminal, also called a mobile communication terminal, refers to a computer device that can be used in mobile, and broadly includes a mobile phone, a notebook, a tablet computer, an intelligent game machine, and even a vehicle-mounted computer, a wearable intelligent device, and the like. The mobile intelligent terminal has the capability of accessing the Internet, is usually provided with various operating systems, and can customize various functions according to the requirements of users. Along with the popularization of intelligent mobile terminal electronic products such as smart mobile phone, bluetooth headset, intelligent panel computer, in order to prevent machine scratch and break, need carry out effectual protection for the product shell, but at present most protective housing is in order to obtain better shock-absorbing capacity, all uses materials such as plastic and other soft plastics to make, when mobile terminal falls from the eminence, the protective housing warp easily for mobile terminal breaks away from the protective housing, and then leads to mobile terminal to be broken and decrease.

Disclosure of Invention

Accordingly, there is a need to provide a mobile terminal protection case to solve the above technical problems.

The invention discloses a mobile terminal protective shell, which comprises a main shell and a metal back frame: the main shell comprises a side frame and a lower cover, wherein the side frame is arranged on the outer edge of the lower cover in an enclosing mode, and the side frame and the lower cover jointly form an accommodating cavity for accommodating the mobile terminal; a groove is formed in one side, away from the accommodating cavity, of the main shell, and the groove extends to the corner of the side frame from the lower cover; the metal back frame, metal back frame integrated into one piece, the shape of metal back frame with the shape phase-match of recess, the metal back frame be used for inlay in the recess.

In one embodiment, the groove comprises a main groove and a branch groove, and the branch groove is communicated with the main groove; the branch grooves are distributed at the corners of the main groove and extend towards the corners of the side frame, so that the corners of the side frame are wrapped.

In one embodiment, the metal back frame comprises a main bar and branch bars, and the branch bars are connected with the main bar; the branch strips are distributed at the corners of the main strip; the trunk strips are used for being embedded in the trunk grooves, and the branch strips are used for being embedded in the branch grooves; when the metal back frame is embedded in the groove, the branch strips extend towards the direction of the corner of the side frame and wrap the corner of the side frame.

In one embodiment, the protective shell further comprises a frame, the corners of the side frame are in arc transition, the side frame comprises a side edge part and an arc part which are sequentially connected along the circumferential direction of the protective shell, the side edge part is provided with an air bag groove, the frame is arranged at the surface opening of the air bag groove, and a closed air bag is formed between the frame and the air bag groove; the groove extends from the lower cover to the arc portion of the side frame.

In one embodiment, the air bag groove is formed in one side of the side frame close to the accommodating cavity, and the closed air bag is formed on the inner side of the protective shell; or the air bag groove is formed in one side, deviating from the accommodating cavity, of the side frame, and the closed air bag is formed in the outer side of the protective shell.

In one embodiment, an opening is formed in one surface of the protective shell opposite to the lower cover, so that the mobile terminal can be conveniently placed in the accommodating cavity; one end of the side frame, which deviates from the lower cover, faces the opening to be bent to form a buckling part, and the buckling part is used for buckling the upper surface of the mobile terminal.

In one embodiment, the side frame includes a connecting portion and a buckling portion along a thickness direction of the protective case, one end of the connecting portion is connected with the rear cover, the other end of the connecting portion is connected with the buckling portion, the connecting portion is used for surrounding the mobile terminal from a side edge, and the buckling portion is used for buckling an upper surface of the mobile terminal from above; the groove extends from the lower cover to the connecting parts at four corners of the side frame.

In one embodiment, the elasticity of the side frame is greater than the elasticity of the metal back frame.

In one embodiment, the buckling part comprises a first contour line and a second contour line, the first contour line is close to the opening, the second contour line is far away from the opening, and the minimum distance between the first contour line and the second contour line represents the buckling amount; the edge of side frame passes through the circular arc transition, the side frame is including the side portion and the circular arc portion that connect gradually along the circumference of protective housing, and the lock volume of at least one circular arc portion is less than the lock volume of side portion.

In one embodiment, the buckling parts of the circular arc parts are in circular arc transition, the curvature radius of a first contour line of at least one circular arc part is R1, the curvature radius of a second contour line of at least one circular arc part is R2, and R1 is less than R2.

In one embodiment, the protective shell further comprises an upper cover, the side frame is arranged around the outer edges of the upper cover and the lower cover, and the side frame and the lower cover jointly enclose to form an accommodating cavity for accommodating the mobile terminal; one side of the main shell body departing from the containing cavity is provided with a groove, the groove extends to the corner of the side frame from the lower cover, or the groove extends to the corner of the side frame from the upper cover and the lower cover.

The mobile terminal protection shell has the beneficial effects that:

according to the mobile terminal protection shell, the groove is formed in one side, away from the accommodating cavity, of the main shell, the metal back frame is embedded in the groove, and the groove and the metal back frame extend to the corner of the side frame from the lower cover, so that on one hand, the scratch-resistant and bending-resistant performances of the protection shell can be effectively improved, the protection shell is not easy to deform when being impacted by external force, and the mobile terminal is prevented from being separated from the protection shell when falling; on the other hand, the metal back frame can effectively disperse and absorb the impact force of the corner when the mobile terminal falls, so that the mobile terminal is prevented from being broken.

Drawings

Fig. 1 is a schematic diagram of an explosive structure of a protective case of a mobile terminal according to an embodiment of the present invention.

Fig. 2 is a schematic view of an overall structure of a protective case of a mobile terminal according to an embodiment of the present invention.

Fig. 3 is a partial longitudinal cross-sectional view of a corner region of a protective case of a mobile terminal according to one embodiment of the present invention.

Fig. 4 is a schematic diagram of an explosive structure of a protective case of a mobile terminal according to another embodiment of the present invention.

Fig. 5 is a schematic view of an overall structure of a mobile terminal protection case according to another embodiment of the present invention.

Fig. 6 is a longitudinal sectional view of a middle region of a protective case of a mobile terminal according to another embodiment of the present invention.

Fig. 7 is a schematic front structure diagram of a mobile terminal protection shell according to an embodiment of the present invention.

Fig. 8 is a schematic view of a partially enlarged structure of a buckle portion of a protective case of a mobile terminal according to an embodiment of the present invention.

Reference numerals:

the main housing 100, the side frame 110, the side portion 111, the arc portion 112, the connecting portion 113, the fastening portion 114, the first contour line 115, the second contour line 116, the lower cover 120, the accommodating cavity 130, the groove 140, the main groove 141, the branch groove 142, the opening 150, the metal back frame 200, the main strip 210, and the branch strip 220; a frame 300 and an air bag groove 400.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. In addition, it should be noted that, in the sectional views in the drawings herein, the section lines are provided for more clearly illustrating the specific structure of the embodiments of the present invention, and in one sectional view, the same section lines schematically represent the same component or represent different components made of the same material, and the shapes of the section lines, including the inclination angle and the spacing distance, do not strictly follow the section line setting of different materials in the mechanical drawing. For example, in the drawings herein, the hatching inclined at 45 ° does not necessarily represent a metal material, but may represent other non-metal materials.

A mobile terminal, also called a mobile communication terminal, refers to a computer device that can be used in mobile, and broadly includes a mobile phone, a notebook, a tablet computer, an intelligent game machine, and even a vehicle-mounted computer, a wearable intelligent device, and the like. The mobile intelligent terminal has the capability of accessing the Internet, is usually provided with various operating systems, and can customize various functions according to the requirements of users. Along with the popularization of intelligent mobile terminal electronic products such as smart mobile phone, bluetooth headset, intelligent panel computer, in order to prevent machine scratch and break, need carry out effectual protection for the product shell, but at present most protective housing all use materials such as plastic and other soft plastics to make, when mobile terminal falls from the eminence, the protective housing warp easily for mobile terminal breaks away from the protective housing, and then leads to mobile terminal to be broken and damaged.

In order to solve the above problems, the present invention provides a mobile terminal protection case. In one embodiment, the structure of the protective case of the mobile terminal is as shown in fig. 1 to 3, wherein fig. 1 is an exploded structure diagram of the protective case, fig. 2 is an overall structure diagram of the protective case, and fig. 3 is a partial longitudinal sectional view of a corner region of the protective case. As shown in fig. 1 to 3, the protective case includes a main case 100 and a metal back frame 200, the main case 100 includes a side frame 110 and a lower cover 120, the side frame 110 is enclosed at an outer edge of the lower cover 120, and the side frame 110 and the lower cover 120 together enclose to form an accommodating cavity 130 for accommodating the mobile terminal; a groove 140 is formed on a side of the main housing 100 away from the accommodating cavity 130, and the groove 140 extends from the lower cover 120 to a corner of the side frame 110; the metal back frame 200 is integrally formed, the shape of the metal back frame 200 is matched with that of the groove 140, and the metal back frame 200 is embedded in the groove 140 through a dispensing process or an embedding process. In one embodiment, the metal backplate 200 is made of aluminum alloy and is integrally formed by a forging process.

It should be noted that, in the embodiment shown in fig. 1 to 3, the protective shell is rectangular, corners of the side frame 110 transition through an arc, the side frame 110 includes a side portion 111 and an arc portion 112 connected in sequence along a circumferential direction of the protective shell, a corner of the side frame 110 refers to the arc portion 112, the side frame 110 has four corners, and the groove 140 extends from the lower cover 120 to the four corners of the side frame 110. It will be appreciated that in other embodiments, the protective casing may have other shapes, for example, the protective casing may have a triangular shape, the side frame 110 may have three corners, and the groove 140 may extend from the lower cover 120 to the three corners of the side frame 110; alternatively, the protective case may have a pentagonal shape, the side frame 110 has five corners, and the groove 140 extends from the lower cover 120 to the five corners of the side frame 110; alternatively, the protective case may have a circular or oval shape, the outer edge of the entire side frame 110 is the corner of the side frame 110, and the groove 140 extends from the lower cover 120 to the outer edge of the entire side frame 110.

As shown in fig. 1 and 2, the groove 140 includes a main groove 141 and four branch grooves 142, and the four branch grooves 142 are all communicated with the main groove 141; the four branch grooves 142 are respectively distributed at four corners of the main groove 141 and extend in a direction toward the corners of the side frame 110, and the four branch grooves 142 respectively wrap the four corners of the side frame 110. In addition, as shown in fig. 1 and 2, the shape of the metal back frame 200 matches the shape of the groove 140, the metal back frame 200 includes a main bar 210 and four branch bars 220, and the four branch bars 220 are all connected with the main bar 210; the four branch bars 220 are respectively distributed at four corners of the main bar 210; the trunk bar 210 is embedded in the trunk groove 141, the four branch bars 220 are respectively embedded in the four branch grooves 142, and the four branch bars 220 extend toward the corners of the side frame 110 and respectively wrap the four corners of the side frame 110.

In one embodiment, as shown in fig. 3, the outer surface of the metal back frame 200 is flush with the outer surface of the protective shell, and the joint surface of the metal back frame 200 and the main housing 100 is located in the groove 140. In a specific embodiment, the metal back frame 200 is embedded in the groove 140 of the main housing 100 through a dispensing process, and a dispensing embedded structure design enables a dispensing bonding surface between the metal back frame 200 and the main housing 100 to be located in the groove 140, so that bonding failure is not likely to occur, and the metal back frame 200 can be firmly arranged on the main housing 100, thereby preventing the metal back frame 200 from being warped or separated from the main housing 100.

In another embodiment, the metal back frame 200 is embedded in the groove 140 of the main housing 100 by an insert-injection process, which is an in-mold injection process, that is, the metal back frame 200 is placed in a mold cavity of the main housing 100, and then the high-temperature molten material of the main housing 100 is injected, so that the metal back frame 200 and the main housing 100 are combined at a high temperature. Therefore, the metal back frame 200 is embedded at one side of the main housing 100 departing from the accommodating cavity 130 through the embedding and injecting process, so that the mechanical strength of the joint of the metal back frame 200 and the main housing 100 can be improved, and the metal back frame 200 is prevented from being warped or separated from the main housing 100.

In the above embodiment, the metal back frame 200 extends from the back of the main housing 100 to the four corners of the side frame 110, and wraps the four corners of the side frame 110, so that on one hand, the scratch-resistant and bending-resistant performance of the protective housing can be effectively improved, the protective housing is not easily deformed when being impacted by external force, and the mobile terminal is prevented from being separated from the protective housing when falling; on the other hand, the metal back frame 200 can effectively disperse and absorb the impact force of any corner when the mobile terminal is dropped, and prevent the mobile terminal from being broken.

In another embodiment, the structure of the protective case of the mobile terminal is as shown in fig. 4 to 6, where fig. 4 is an exploded structural diagram of the protective case, fig. 5 is an overall structural diagram of the protective case, and fig. 6 is a longitudinal sectional view of a middle region of the protective case. As shown in fig. 4 to 6, the protective case further includes a frame 300, corners of the side frame 110 are in arc transition, the side frame 110 includes a side portion 111 and an arc portion 112 sequentially connected along the circumferential direction of the protective case, an air bag groove 400 is formed in one side of the side frame 110 close to the accommodating cavity 130, the frame 300 is disposed at an opening on the surface of the air bag groove 400, and a closed air bag is formed between the frame 300 and the air bag groove 400; the corner of the side frame 110 refers to the circular arc portion 112 of the side frame 110, and the metal back frame 200 extends from the back of the main case 100 to the four circular arc portions 112 of the side frame 110 and wraps the four circular arc portions 112 of the side frame 110.

In the embodiment shown in fig. 4 to 6, the air bag groove 400 is opened at one side of the side frame 110 close to the accommodating cavity 130, and the closed air bag is formed at the inner side of the protective shell. It is understood that in other embodiments, the air bag groove 400 may also be opened on a side of the side frame 110 facing away from the receiving cavity 130, and the closed air bag is formed on an outer side of the protective shell. In the embodiment shown in fig. 4 to 6, the metal back frame 200 extends from the back of the main housing 100 to the four circular arc portions 112 of the side frame 110, and wraps the four circular arc portions 112 of the side frame 110, thereby effectively improving the impact resistance of the arc portions 112 of the protective housing; the closed type air bag is formed on the side edge part 111 of the protective shell, so that the impact resistance of the side edge part 111 of the protective shell is effectively improved, and the closed type air bag and the protective shell are combined, so that the protective shell can protect the mobile terminal without dead angles.

In one embodiment, as shown in fig. 3, 5 and 7, an opening 150 is formed on a side of the protective case opposite to the lower cover 120 to facilitate the mobile terminal to be placed in the receiving cavity 130. As shown in fig. 3, in the thickness direction of the protective case, one end of the side frame 110 away from the lower cover 120 is bent toward the opening 150 to form an engaging portion 114, and the engaging portion 114 is used for engaging with the upper surface of the mobile terminal to prevent the mobile terminal from being detached from the protective case from the opening 150. As shown in fig. 3, the side frame 110 includes a connecting portion 113 and a fastening portion 114 along a thickness direction of the protective case, one end of the connecting portion 113 is connected to the lower cover 120, the other end is connected to the fastening portion 114, the connecting portion 113 is used for surrounding the mobile terminal from a side, and the fastening portion 114 is used for fastening an upper surface of the mobile terminal from above to prevent the mobile terminal from being detached from the protective case from the opening 150. The groove 140 and the metal back frame 200 extend from the back of the main housing 100 to the connection portion 113 of the side frame 110. The side frame 110 is made of plastic material, and may specifically adopt polycarbonate, polyurethane, elastomer rubber, etc., and the elasticity of the side frame 110 is greater than that of the metal back frame 200. Due to the arrangement, on one hand, the protective shell is not easy to deform, and the mobile terminal can be prevented from being separated from the protective shell when being impacted by external force; on the other hand, since the buckling part 114 is not provided with the groove 140 and the metal back frame 200, the buckling part 114 has better deformability, when a user wants to take the mobile terminal out of the accommodating cavity 130 of the protective housing, the user pulls the buckling part 114 with an external force, so that the buckling part 114 is bent away from the opening 150, the size of the opening 150 is enlarged, and the mobile terminal can be taken out of the accommodating cavity 130 of the protective housing.

In another embodiment, in order to further facilitate the removal of the mobile terminal from the receiving cavity 130 of the protective case, the protective case is structured as shown in fig. 5 and 7, and the partially enlarged structure of the fastening portion 114 is shown in fig. 8, the fastening portion 114 includes a first contour 115 and a second contour 116, the first contour 115 is close to the opening 150, the second contour 116 is away from the opening 150, and the minimum distance between the first contour 115 and the second contour 116 represents the fastening amount; the corners of the side frame 110 are in arc transition, the side frame 110 comprises side portions 111 and arc portions 112 which are connected in sequence along the circumferential direction of the protective shell, a first contour line 115 and a second contour line 116 of each side portion 111 are parallel, the buckling amount of each side portion 111 is D1, the buckling amounts of the four arc portions 112 are D2, and D1 is greater than D2. That is, in the embodiments shown in fig. 7 and 8, the fastening amount of the arc portion 112 is reduced, when a user wants to take the mobile terminal out of the receiving cavity 130 of the protective housing, the fastening portion 114 of the arc portion 112 is pulled by an external force, so that the fastening portion 114 of the arc portion 112 is bent away from the opening 150, the size of the opening 150 of the arc portion 112 is enlarged, one corner of the mobile terminal is firstly separated from the receiving cavity 130 of the protective housing, and then the whole mobile terminal is separated from the receiving cavity 130 of the protective housing.

It should be noted that, in the embodiment shown in fig. 7, the fastening portions 114 of the four circular arc portions 112 have smaller fastening amounts, and the fastening amounts of the four circular arc portions 112 are equal, so that a user can use an external force to break the fastening portion 114 of any one circular arc portion 112, first separate one corner of the mobile terminal from the receiving cavity 130 of the protective housing, and then separate the whole mobile terminal from the receiving cavity 130 of the protective housing. It is understood that in other embodiments, only the fastening portion 114 of the circular arc portion 112 may be designed to have a smaller fastening amount, and when a user wants to take the mobile terminal out of the receiving cavity 130 of the protective housing, the fastening portion 114 with the smaller fastening amount is pulled by an external force, so as to first separate one corner of the mobile terminal from the receiving cavity 130 of the protective housing, and then separate the whole mobile terminal from the receiving cavity 130 of the protective housing. It is understood that, in other embodiments, two or three of the circular arc portions 112 may also be designed to have a smaller fastening amount, and the fastening amounts of the two or three circular arc portions 112 may be the same or different.

In one embodiment, as shown in fig. 7 and 8, the first contour line 115 and the second contour line 116 of the side portion 111 are parallel to each other, the fastening portion 114 of the arc portion 112 is in arc transition, the first contour line 115 and the second contour line 116 of the arc portion 112 are both quarter arc segments, the curvature radius of the first contour line 115 of the arc portion 112 is R1, the curvature radius of the second contour line 116 of the arc portion 112 is R2, R1 < R2, so that the arc portion 112 has a smaller fastening amount D2, and a user can conveniently detach the mobile terminal from the receiving cavity 130 of the protective case from the corner of the protective case, that is, the arc portion 112 separates the mobile terminal from the receiving cavity 130 of the protective case.

It can be understood that, in the above embodiment, the mobile terminal is placed in the accommodating cavity of the protective shell, and the operation process of the mobile terminal is opposite to the operation process of the mobile terminal.

In addition, in the embodiment shown in fig. 3 and 6, the side frame 110 and the lower cover 120 of the main housing 100 are integrally formed by using the same material, and the main housing 100 may be made of polycarbonate, polyurethane, elastomer rubber, and the like, so as to absorb shock and prevent falling, effectively disperse and absorb the impact force of falling of the mobile terminal, and be used for preventing falling of the mobile terminal. It is understood that, in other embodiments, the side frame 110 and the lower cover 120 of the main housing 100 may be made of different materials, only the side frame 110 of the main housing 100 may be made of polyurethane, elastomer rubber, or other materials, so as to increase the impact resistance and the buffering capacity at the corners of the protective housing, and the lower cover 120 of the main housing 100 may be made of other materials, for example, the lower cover 120 of the main housing 100 may be made of polycarbonate material with better mechanical properties, toughness, and transparency.

In addition, it should be noted that in the embodiment shown in fig. 1 to 7, the protective shell only includes the lower cover 120, the groove 140 and the metal back frame 200 extend from the lower cover 120 to four corners of the side frame 110 and wrap the four corners of the side frame 110, and an opening 150 is disposed on a surface of the protective shell opposite to the lower cover 120 to facilitate the mobile terminal to be placed in the accommodating cavity 130. It is understood that in other embodiments, the protective casing may further include an upper cover, the upper cover is disposed opposite to the lower cover 120, the side frame 110 is enclosed at the outer edges of the upper cover and the lower cover 120, and the side frame 110 and the lower cover 120 together enclose to form an accommodating cavity 130 for accommodating the mobile terminal; the side of the main housing 100 facing away from the receiving cavity 130 is provided with a groove 140, and the groove 140 extends from the lower cover 120 to the corner of the side frame 110, or the groove 140 extends from the upper cover and the lower cover 120 to the corner of the side frame 110 and includes the corner of the side frame 110. It is understood that a closable opening 150 may be further provided on the main housing 100 for the convenience of putting the mobile terminal therein.

According to the mobile terminal protection shell, the groove 140 is formed in one side, away from the accommodating cavity 130, of the main shell 100, the metal back frame 200 is embedded in the groove 140, and the groove 140 and the metal back frame 200 extend from the lower cover 120 to the corner of the side frame 110, so that on one hand, the scratch resistance and bending resistance of the protection shell can be effectively improved, the protection shell is not easy to deform when being impacted by external force, and the mobile terminal is prevented from being separated from the protection shell when falling; on the other hand, the metal back frame 200 can effectively disperse and absorb the impact force of the corner when the mobile terminal is dropped, thereby preventing the mobile terminal from being broken.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A mobile terminal protective case, comprising:

the mobile terminal comprises a main shell, a side frame and a lower cover, wherein the side frame is arranged on the outer edge of the lower cover in an enclosing mode, and the side frame and the lower cover jointly form an accommodating cavity for accommodating the mobile terminal; a groove is formed in one side, away from the accommodating cavity, of the main shell, and the groove extends to the corner of the side frame from the lower cover; and

the metal back frame, metal back frame integrated into one piece, the shape of metal back frame with the shape phase-match of recess, the metal back frame be used for inlay in the recess.

2. The protective case of claim 1, wherein the recess comprises a trunk slot and a branch slot, the branch slot being in communication with the trunk slot; the branch grooves are distributed at the corners of the main groove and extend towards the corners of the side frame, so that the corners of the side frame are wrapped.

3. The protective case of claim 2, wherein the metal back frame comprises a trunk bar and branch bars, the branch bars being connected to the trunk bar; the branch strips are distributed at the corners of the main strip; the trunk strips are used for being embedded in the trunk grooves, and the branch strips are used for being embedded in the branch grooves; when the metal back frame is embedded in the groove, the branch strips extend towards the direction of the corner of the side frame and wrap the corner of the side frame.

4. The mobile terminal protection shell according to claim 1, further comprising a frame, wherein corners of the side frame are in arc transition, the side frame comprises a side portion and an arc portion which are sequentially connected in the circumferential direction of the protection shell, the side portion is provided with an airbag groove, the frame is arranged at an opening on the surface of the airbag groove, and a closed airbag is formed between the frame and the airbag groove; the groove extends from the lower cover to the arc portion of the side frame.

5. The protective case of claim 4, wherein the air bag slot is opened at one side of the side frame close to the accommodating cavity, and the closed air bag is formed at the inner side of the protective case; or the air bag groove is formed in one side, deviating from the accommodating cavity, of the side frame, and the closed air bag is formed in the outer side of the protective shell.

6. The mobile terminal protection shell according to any one of claims 1 to 5, wherein an opening is formed in a surface of the protection shell opposite to the lower cover, so that the mobile terminal can be conveniently placed in the accommodating cavity; one end of the side frame, which deviates from the lower cover, faces the opening to be bent to form a buckling part, and the buckling part is used for buckling the upper surface of the mobile terminal.

7. The protective case of claim 6, wherein the side frame comprises a connecting portion and a buckling portion along a thickness direction of the protective case, one end of the connecting portion is connected with the rear cover, the other end of the connecting portion is connected with the buckling portion, the connecting portion is used for surrounding the mobile terminal from a side edge, and the buckling portion is used for buckling an upper surface of the mobile terminal from above; the groove extends from the lower cover to the connecting parts at four corners of the side frame.

8. The protective case of claim 7, wherein the side frame has greater elasticity than the metal back frame.

9. The protective case of claim 7, wherein the engagement portion comprises a first contour line and a second contour line, the first contour line being proximate to the opening, the second contour line being distal from the opening, a minimum distance between the first contour line and the second contour line representing an amount of engagement; the edge of side frame passes through the circular arc transition, the side frame is including the side portion and the circular arc portion that connect gradually along the circumference of protective housing, and the lock volume of at least one circular arc portion is less than the lock volume of side portion.

10. The protective case of claim 9, wherein the engagement portions of the circular arc portions transition through circular arcs, and a first contour radius of curvature of at least one of the circular arc portions is R1, and a second contour radius of curvature is R2, R1 < R2.

11. The protective case of claim 1, further comprising an upper cover, wherein the side frame is enclosed at the outer edges of the upper cover and the lower cover, and the side frame, the upper cover and the lower cover together enclose an accommodating cavity for accommodating the mobile terminal; one side of the main shell body departing from the containing cavity is provided with a groove, the groove extends to the corner of the side frame from the lower cover, or the groove extends to the corner of the side frame from the upper cover and the lower cover.