CN213305473U

CN213305473U - Mobile terminal protective housing

Info

Publication number: CN213305473U
Application number: CN202021309642.7U
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: 2021-05-28
Anticipated expiration: 2030-07-06

Abstract

The utility model relates to a mobile terminal protection shell, which comprises a main shell and a metal back frame, wherein the main shell sequentially comprises a bottom part, a transition part and a side edge part along the thickness direction of the protection shell, and the three parts jointly enclose to form an accommodating cavity for accommodating a mobile terminal; one side of the main shell, which is far away from the accommodating cavity, is provided with a groove, the grooves are distributed in the transition part along the circumferential direction of the main shell, and the grooves at the corner parts of the main shell extend to the side edge part from the transition part; the metal back frame is integrally formed, the shape of the metal back frame is matched with that of the groove, and the metal back frame is used for being embedded in the groove. The utility model discloses a mobile terminal protective housing, on one hand can effectively promote the performance that the protective housing is resistant to scratch, prevent bending, make the protective housing also difficult to warp when receiving external force impact, prevent that the mobile terminal breaks away from the protective housing when dropping; 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 utility model relates to a protective housing technical field especially relates to a mobile terminal protective housing.

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.

SUMMERY OF THE UTILITY MODEL

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

The utility model discloses a mobile terminal protective housing, including main casing body and metal back frame, wherein, the main casing body includes bottom, transition portion and side edge portion in proper order along the thickness direction of protective housing, side edge portion and transition portion surround the outside edge of bottom, and the transition portion is located between side edge portion and the bottom to side edge portion, bottom and transition portion enclose jointly and form the holding chamber that is used for holding mobile terminal; a groove is formed in one side, away from the accommodating cavity, of the main shell, the grooves are distributed in the transition part along the circumferential direction of the main shell, and the grooves in the corner parts of the main shell extend to the side edge parts from the transition part; the metal back frame is integrally formed, the shape of the metal back frame is matched with that of the groove, and the metal back frame is used for being embedded in the groove.

In one embodiment, the groove comprises a side groove and a branch groove, the side groove is distributed on the transition part along the circumferential direction of the main shell, the branch groove is positioned at the corner part of the main shell, and the branch groove is communicated with the side groove and extends towards the side part; the branch groove wraps around a corner portion of the main housing.

In one embodiment, the metal back frame comprises a main frame strip and a branch strip, wherein the main frame strip is used for being embedded in the side groove, and the branch strip is used for being embedded in the branch groove; when the metal back frame is embedded in the groove, the branch bars are positioned at the corner parts of the main shell, extend towards the side parts and wrap the corner parts of the main shell.

In one embodiment, the main housing comprises a side frame and a lower cover, and the side frame and the lower cover are integrally formed by using the same material.

In one embodiment, the main housing comprises a side frame and a lower cover, the side frame and the lower cover are respectively made of different materials, and the elasticity of the side frame is greater than that of the lower cover; the groove is formed in one side, away from the accommodating cavity, of the side frame; the lower cover comprises a cover body and an extension part, the extension part is matched with the groove in shape, the extension part and the metal back frame are both used for being embedded in the groove, and the extension part is located between the metal back frame and the side frame.

In one embodiment, an opening is formed in a surface of the main housing opposite to the bottom, so that the mobile terminal can be conveniently placed in the accommodating cavity; the main casing body still includes buckling parts on the thickness direction of protective housing, the one end and the side portion of buckling parts are connected, and the other end orientation the opening is crooked, is used for the lock mobile terminal's upper surface.

In one embodiment, the bottom portion is used for carrying the mobile terminal, the transition portion and the side portion are used for surrounding the mobile terminal from the side, and the buckling portion is used for buckling the upper surface of the mobile terminal from the top; the grooves of the main housing corner portions extend from the transition portion to the side edge portions.

In one embodiment, the elasticity of the buckling part is greater than that 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 the main casing body is in arc transition, the buckling part comprises a connecting part and an arc part which are sequentially connected along the circumferential direction of the protective shell, and the buckling amount of at least one arc part is smaller than that of the connecting part.

In one embodiment, the first contour line curvature radius of at least one of the circular arc portions is R1, and the second contour line curvature radius is R2, R1 < R2.

In one embodiment, the metal back frame is embedded in the groove through a dispensing process or an in-mold injection molding process.

The utility model discloses a mobile terminal protective housing, its beneficial effect does:

the utility model discloses a mobile terminal protective housing, through set up the recess in the main casing body one side that deviates from the holding chamber, inlay the metal back frame in the recess, and distribute recess and metal back frame in the transition portion along the circumferencial direction of main casing body, and extend the recess of main casing body bight to the side part from the transition portion, thereby wrap up the bight of main casing body, can effectively promote the performance that the protective housing is able to bear or endure scraping, prevent bending on the one hand, make the protective housing also difficult to be out of shape when receiving external force to strike, prevent that mobile terminal breaks away from the protective housing 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 an explosion structure diagram of a mobile terminal protection shell according to an embodiment of the present invention.

Fig. 2 is an overall structure schematic diagram of the protective housing of the mobile terminal according to an embodiment of the present invention.

Fig. 3 is a longitudinal cross-sectional view of a diagonal position of a protective casing of a mobile terminal according to an embodiment of the present invention.

Fig. 4 is a longitudinal sectional view of a diagonal position of a protective casing of a mobile terminal according to another embodiment of the present invention.

Fig. 5 is a schematic front structural view of a protective case of a mobile terminal according to an embodiment of the present invention.

Fig. 6 is a schematic view of a partially enlarged structure of a buckling part of a protective case of a mobile terminal according to an embodiment of the present invention.

Reference numerals:

the main housing 100, the bottom 110, the transition portion 120, the side portion 130, the buckling portion 140, the first contour 141, the second contour 142, the accommodating cavity 150, the groove 160, the side groove 161, the branch groove 162, the side frame 170, the connecting portion 171, the arc portion 172, the lower cover 180, the cover 181, the extending portion 182, and the opening 190; a metal back frame 200, a main frame strip 210 and a branch strip 220.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "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, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present 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," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. 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 hatching is provided to more clearly illustrate the specific structure of the embodiments of the present invention, and in a sectional view, the same hatching schematically represents the same component or represents different components made of the same material, and the shape of the hatching, including the inclination angle and the spacing distance, does not strictly follow the hatching setting for 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.

In order to solve the problem, the utility model provides a mobile terminal protective housing. In one embodiment, the structure of the protective case of the mobile terminal is as shown in fig. 1 to fig. 3, where fig. 1 is an exploded structural diagram of the protective case, fig. 2 is an overall structural diagram of the protective case, and fig. 3 is a longitudinal sectional view of the protective case at a diagonal position. As shown in fig. 1 to 3, the protective shell includes a main shell 100 and a metal back frame 200, the main shell 100 includes a bottom 110, a transition portion 120 and a side portion 130 in sequence along a thickness direction of the protective shell, the transition portion 120 and the side portion 130 are distributed along a circumferential direction of the protective shell, the side portion 130 and the transition portion 120 surround an outer edge of the bottom 110, the transition portion 120 is located between the side portion 130 and the bottom 110, and the side portion 130, the bottom 110 and the transition portion 120 together surround to form an accommodating cavity 150 for accommodating the mobile terminal; a groove 160 is formed in one side of the main housing 100 away from the accommodating cavity 150, the groove 160 is distributed in the transition portion 120 along the circumferential direction of the main housing 100, and the groove 160 at the corner of the main housing 100 extends from the transition portion 120 to the side edge portion 130; the shape of the metal back frame 200 matches the shape of the groove 160, and the metal back frame 200 is embedded in the groove 160 of the main housing 100 through a dispensing process or an embedding process.

It should be noted that in the embodiment shown in fig. 1 to 3, the protective shell has a rectangular shape, the main housing 100 has four corners, and the groove 160 at each corner of the main housing 100 extends from the transition portion 120 to the side portion 130. It will be appreciated that in other embodiments, the protective shell may have other shapes, for example, the protective shell may also be triangular, having three corners; alternatively, the protective shell may be pentagonal, having five corners, with the groove 160 of each corner of the main shell 100 extending from the transition portion 120 to the side portion 130; alternatively, the protective casing may have a circular or oval shape, in which case the outer edge of the entire main casing 100 is the corner of the main casing 100, and the groove 160 of the main casing 100 extends from the transition part 120 to the entire outer edge of the main casing 100.

As shown in fig. 1 and 2, the groove 160 includes a side groove 161 and four branch grooves 162, the side groove 161 is distributed in the transition portion 120 along the circumferential direction of the main housing 100, the four branch grooves 162 are respectively located at four corners of the main housing 100, and the branch grooves 162 are communicated with the side groove 161 and extend toward the side portions 130 of the corners, so that the four branch grooves 162 respectively wrap the four corners of the main housing 100. The shape of the metal back frame 200 matches the shape of the groove 160, as shown in fig. 1, the metal back frame 200 includes a main frame strip 210 and four branch strips 220, the main frame strip 210 is used for being embedded in the side groove 161, and the four branch strips 220 are respectively used for being embedded in the four branch grooves 162; when the metal back frame 200 is fitted in the groove 160, as shown in fig. 2, the four branch bars 220 are respectively located at the four corners of the main housing 100, respectively extend toward the side edge portions 130, and thus respectively wrap the four corners of the main housing 100. In one embodiment, the metal backplate 200 is made of aluminum alloy and is integrally formed by a forging process. In another embodiment, the main frame strip 210 and the branch strip 220 of the metal back frame 200 are respectively formed by a forging process, and the main frame strip 210 and the branch strip 220 are detachably connected.

In the above embodiment, the metal back frame 200 is embedded in the transition portion 120 of the main housing 100 along the circumferential direction of the protective housing, and the metal back frames 200 at the four corners of the main housing 100 extend from the transition portion 120 to the side portions 130, so as to wrap the four corners of the main housing 100, on one hand, the scratch-resistant and bending-resistant performance of the protective housing can be effectively improved, so that 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 addition, as shown in fig. 1 to 3, the main housing 100 includes a side frame 170 and a lower cover 180, the side frame 170 and the lower cover 180 are made of different materials, respectively, and the elasticity of the side frame 170 is greater than that of the lower cover 180; the groove 160 is opened on one side of the side frame 170, which is away from the accommodating cavity 150, the corners of the side frame 170 transition through an arc, the side frame 170 includes a connecting portion 171 and an arc portion 172, which are sequentially connected, along the circumferential direction of the main housing 100, the arc portion 172 corresponds to the corner portion of the main housing 100, and the groove 160 extends from the transition portion 120 to the side portion 130 at the position of the arc portion 172 of the side frame 170; the lower cover 180 includes a cover body 181 and an extension 182, the extension 182 matches the shape of the groove 160, the extension 182 and the metal back frame 200 are both configured to be embedded in the groove 160, and the extension 182 is located between the metal back frame 200 and the side frame 170, that is, the extension 182 of the lower cover 180 is first embedded in the groove 160, and then the metal back frame 200 is embedded outside the extension 182. With such an arrangement, since the elasticity of the side frame 170 is greater than that of the lower cover 180, when the protective shell receives external force impact, the deformation degree of the lower cover 180 is small, the metal back frame 200 is embedded outside the extension part 182 of the lower cover 180, and the phenomenon that the metal back frame 200 is warped or separated from the main housing 100 due to the excessive deformation of the extension part 182 can be avoided.

In a specific embodiment, the lower cover 180 and the side frame 170 are made of plastic material, for example, the side frame 170 may be made of polyurethane, elastomer rubber, or other material with good elasticity, and the cover 181 may be made of polycarbonate with good mechanical strength and toughness. In addition, in order to improve the bonding strength between the lower cover 180 and the side frame 170, the lower cover 180 is bonded with the side frame 170 through an insert injection process, wherein the insert injection process refers to in-mold injection, that is, the lower cover 180 is firstly formed through injection molding, then the formed lower cover 180 is placed in a forming mold cavity of the side frame 170, and then the side frame 170 material which is melted at high temperature is injected, so that the side frame 170 and the lower cover 180 are bonded at high temperature; or, the side frame 170 is first injection molded, then the molded side frame 170 is placed in the molding mold cavity of the lower cover 180, and then the high-temperature molten material of the lower cover 180 is injected, so that the lower cover 180 and the side frame 170 are combined at high temperature. Therefore, the extension part 182 of the lower cover 180 is embedded in the groove 160 of the side frame 170 through the embedding and injecting process, so that the mechanical strength of the joint of the extension part 182 of the lower cover 180 and the side frame 170 can be improved.

In one embodiment, as shown in fig. 3, the outer surface of the metal back frame 200 is flush with the outer surfaces of the side frame 170 and the lower cover 180, and the combining surface of the metal back frame 200 and the extension part 182 is located in the groove 160. In a specific embodiment, the metal back frame 200 is embedded in the groove 160 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 extension portion 182 to be located in the groove 160, so that bonding failure is not likely to occur, and the metal back frame 200 can be firmly disposed 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 160 of the main housing 100 by an insert-injection process, that is, the metal back frame 200 is placed in a molding cavity of the lower cover 180, and then a high-temperature molten material of the lower cover 180 is injected, so that the metal back frame 200 is combined with the extension 182 of the lower cover 180 at a high temperature. Therefore, the metal back frame 200 is embedded in the groove 160 of the main housing 100 through the embedding and injecting process, so that the mechanical strength of the joint of the metal back frame 200 and the extension part 182 of the lower cover 180 can be improved, and the metal back frame 200 is prevented from being warped or separated from the main housing 100.

It should be noted that, in the embodiments shown in fig. 1 to 3, the side frame 170 and the lower cover 180 of the main housing 100 are made of different materials, respectively, and it is understood that, in other embodiments, as shown in fig. 4, the side frame 170 and the lower cover 180 of the main housing 100 may be integrally formed by using the same material, for example, the side frame 170 and the lower cover 180 of the main housing 100 may be made of polycarbonate with better mechanical strength and toughness, and the metal back frame 200 is directly combined with the side frame 170 in the groove 160 and then embedded in the groove 160.

In addition, as shown in fig. 3 and 4, an opening 190 is formed on a surface of the main housing 100 opposite to the bottom 110 to facilitate the mobile terminal to be placed in the accommodating cavity 150; the main housing 100 further includes a fastening portion 140 along a thickness direction of the protective housing, the fastening portion 140 is distributed along a circumferential direction of the protective housing, one end of the fastening portion 140 is connected to the side portion 130, and the other end is bent toward the opening 190 for fastening an upper surface of the mobile terminal. As shown in fig. 3 and 4, the bottom portion 110 of the main housing 100 is used for carrying the mobile terminal, the transition portion 120 and the side portion 130 are used for laterally surrounding the mobile terminal, and the buckling portion 140 is used for buckling the upper surface of the mobile terminal from above to prevent the mobile terminal from being detached from the protective housing from the opening 190. As shown in fig. 3 and 4, the groove 160 at the corner of the main housing 100 extends from the transition portion 120 to the side portion 130, but does not extend to the buckling portion 140, the buckling portion 140 is made of plastic material, specifically, polycarbonate, polyurethane, elastomer rubber, etc., the elasticity of the buckling portion 140 is greater than that of the metal back frame 200, and the groove 160 at the corner of the main housing 100 extends from the transition portion 120 to the side portion 130, but does not extend to the buckling portion 140. The mobile terminal protection shell has three functions, wherein the first function is that the protection shell is not easy to deform, and the mobile terminal can be prevented from being separated from the protection shell when being impacted by external force; the second effect is that the metal back frame 200 can effectively disperse and absorb the impact force of any corner when the mobile terminal falls, so as to prevent the mobile terminal from being broken; the third effect is that, since the groove 160 and the metal back frame 200 are not disposed on the fastening portion 140, the fastening portion 140 has a better deformation capability, when a user wants to take the mobile terminal out of the accommodating cavity 150 of the protective housing, the fastening portion 140 is pulled by an external force, so that the fastening portion 140 is bent away from the opening 190, the size of the opening 190 is enlarged, and the mobile terminal can be taken out of the accommodating cavity 150 of the protective housing. It can be understood that, the mobile terminal is placed in the accommodating cavity 150 of the protective shell, and the operation process of the mobile terminal is opposite to that of the mobile terminal, and the mobile terminal can be conveniently taken out of the accommodating cavity 150 of the protective shell and can also be conveniently placed in the accommodating cavity 150 of the protective shell.

In another embodiment, in order to further facilitate taking out the mobile terminal from the accommodating cavity 150 of the protective housing, the protective housing is as shown in fig. 5, and the fastening portion 140 is partially enlarged as shown in fig. 6, the fastening portion 140 includes a first contour 141 and a second contour 142, the first contour 141 is close to the opening 190, the second contour 142 is away from the opening 190, and a minimum distance between the first contour 141 and the second contour 142 represents a fastening amount; the corner of buckling part 140 passes through the circular arc transition, and buckling part 140 includes connecting portion 171 and circular arc portion 172 that connect gradually along the circumference of protective housing, and circular arc portion 172 corresponds the bight of protective housing. As shown in fig. 5 and 6, the first contour 141 and the second contour 142 of the connecting portion 171 are parallel, the engaging amount of the connecting portion 171 is D1, the engaging amount of the four arc portions 172 is D2, and D1 > D2. That is, in the embodiments shown in fig. 5 and 6, the fastening amount of the arc portion 172 is reduced, when the user wants to take the mobile terminal out of the accommodating cavity 150 of the protective housing, the fastening portion 140 of the arc portion 172 is pulled by an external force, so that the fastening portion 140 of the arc portion 172 is bent away from the opening 190, the size of the opening 190 of the arc portion 172 is enlarged, one corner of the mobile terminal is firstly separated from the accommodating cavity 150 of the protective housing, and then the whole mobile terminal is separated from the accommodating cavity 150 of the protective housing.

It should be noted that, in the embodiment shown in fig. 5, the fastening portions 140 of the four circular arcs 172 have smaller fastening amounts, and the fastening amounts of the four circular arcs 172 are equal, so that a user can use an external force to break the fastening portion 140 of any one circular arc 172, first separate one corner of the mobile terminal from the receiving cavity 150 of the protective housing, and then separate the whole mobile terminal from the receiving cavity 150 of the protective housing. It is understood that in other embodiments, only the fastening portion 140 of the circular arc portion 172 may be designed to have a smaller fastening amount, and when a user wants to take the mobile terminal out of the accommodating cavity 150 of the protective housing, the fastening portion 140 having the smaller fastening amount is pulled by an external force, so as to first separate one corner of the mobile terminal from the accommodating cavity 150 of the protective housing, and then separate the entire mobile terminal from the accommodating cavity 150 of the protective housing. It is understood that in other embodiments, two or three of the circular arc portions 172 may also be designed to have a smaller fastening amount, and the fastening amounts of the two or three circular arc portions 172 may be the same or different.

In one embodiment, as shown in fig. 5 and 6, the first contour line 141 and the second contour line 142 of the connecting portion 171 are parallel to each other, the engaging portion 140 of the arc portion 172 is in arc transition, the first contour line 141 and the second contour line 142 of the arc portion 172 are both quarter arc segments, the curvature radius of the first contour line 141 of the arc portion 172 is R1, the curvature radius of the second contour line 142 of the arc portion 172 is R2, and R1 < R2, so that the arc portion 172 has a smaller engaging amount D2, and a user can conveniently disengage the mobile terminal from the receiving cavity 150 of the protective case from the corner of the protective case, that is, the arc portion 172 disengages the mobile terminal from the receiving cavity 150 of the protective case.

It can be understood that, in the above embodiments, the mobile terminal is placed into the receiving cavity 150 of the protective casing, and the operation process is opposite to the operation process of taking out the mobile terminal, and the above design facilitates taking out the mobile terminal from the receiving cavity 150 of the protective casing and placing the mobile terminal into the receiving cavity 150 of the protective casing.

The utility model discloses a mobile terminal protective housing, through seting up recess 160 in the main casing body 100 one side that deviates from holding chamber 150, inlay metal back frame 200 in recess 160, and distribute recess 160 and metal back frame 200 in transition portion 120 along the periphery direction of main casing body 100, and extend the recess 160 in main casing body 100 bight to side portion 130 from transition portion 120, thereby wrap up the bight of main casing body 100, on the one hand, can effectively promote the performance that the protective housing is able to bear or endure scraping, prevent bending, make the protective housing also difficult to warp when receiving external force impact, prevent that mobile terminal breaks away from the protective housing 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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A mobile terminal protective case, comprising:

the main shell comprises a bottom, a transition part and a side edge part in sequence along the thickness direction of the protective shell, wherein the side edge part and the transition part surround the outer edge of the bottom, the transition part is positioned between the side edge part and the bottom, and the side edge part, the bottom and the transition part surround together to 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, the grooves are distributed in the transition part along the circumferential direction of the main shell, and the grooves in the corner parts of the main shell extend to the side edge parts from the transition part; 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 groove comprises a side groove and a branch groove, the side groove is distributed at the transition portion along the circumferential direction of the main housing, the branch groove is located at a corner portion of the main housing, and the branch groove is communicated with the side groove and extends towards the side portion; the branch groove wraps around a corner portion of the main housing.

3. The protective case of claim 2, wherein the metal back frame comprises a main frame strip and a branch strip, the main frame strip is configured to be embedded in the side groove, and the branch strip is configured to be embedded in the branch groove; when the metal back frame is embedded in the groove, the branch bars are positioned at the corner parts of the main shell, extend towards the side parts and wrap the corner parts of the main shell.

4. The protective case of claim 1, wherein the main case comprises a side frame and a lower cover, and the side frame and the lower cover are integrally formed of the same material.

5. The protective case of claim 1, wherein the main case comprises a side frame and a lower cover, the side frame and the lower cover are made of different materials, and the elasticity of the side frame is greater than that of the lower cover; the groove is formed in one side, away from the accommodating cavity, of the side frame; the lower cover comprises a cover body and an extension part, the extension part is matched with the groove in shape, the extension part and the metal back frame are both used for being embedded in the groove, and the extension part is located between the metal back frame and the side frame.

6. The protective case of any one of claims 1 to 5, wherein an opening is formed on a side of the main case opposite to the bottom to facilitate the mobile terminal to be placed in the accommodating cavity; the main casing body still includes buckling parts on the thickness direction of protective housing, the one end and the side portion of buckling parts are connected, and the other end orientation the opening is crooked, is used for the lock mobile terminal's upper surface.

7. The protective case of claim 6, wherein the bottom portion is configured to carry the mobile terminal, the transition portion and the side portion are configured to laterally surround the mobile terminal, and the fastening portion is configured to fasten an upper surface of the mobile terminal from above; the grooves of the main housing corner portions extend from the transition portion to the side edge portions.

8. The protective case of claim 7, wherein the buckling part has elasticity greater than that of 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 the main casing body is in arc transition, the buckling part comprises a connecting part and an arc part which are sequentially connected along the circumferential direction of the protective shell, and the buckling amount of at least one arc part is smaller than that of the connecting part.

10. The protective case of claim 9, wherein 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, wherein the metal back frame is configured to be embedded in the groove through a dispensing process or an in-mold injection molding process.