WO2022007208A1

WO2022007208A1 - Mobile terminal protection shell

Info

Publication number: WO2022007208A1
Application number: PCT/CN2020/118685
Authority: WO
Inventors: 黄小凤; 余佳
Original assignee: 深圳市中创卓越科技有限公司
Priority date: 2020-07-06
Filing date: 2020-09-29
Publication date: 2022-01-13
Also published as: CN113905120A; CN113905120B

Abstract

The present invention relates to a mobile terminal protection shell, comprising a main shell body and a metal back frame. The main shell body sequentially comprises a bottom, transition portions, and side edge portions in the thickness direction of the protection shell, and the three portions jointly define an accommodation cavity for accommodating a mobile terminal; grooves are formed in the side of the main shell body facing away from the accommodation cavity, the grooves are distributed in the transition portions in the circumferential direction of the main shell body, and the grooves at the corners of the main shell body extend from the transition portions to the side edge portions; the metal back frame is integrally formed, the metal back frame matches the grooves in shape, and the metal back frame is embedded in the grooves. According to the mobile terminal protection shell of the present invention, on one hand, the scratch resistance and the bending resistance of the protection shell can be effectively promoted, so that the protection shell is not easily deformed when being impacted by an external force, and the mobile terminal is prevented from being separated from the protection shell when falling off; and on the other hand, the metal back frame can also effectively disperse the impact force of the corners when the mobile terminal falls off, so as to prevent the mobile terminal from being broken.

Description

Mobile terminal protective case

technical field

The present invention relates to the technical field of protective casings, in particular to a mobile terminal protective casing.

Background technique

A mobile terminal, also known as a mobile communication terminal, refers to a computer device that can be used on the move. Broadly speaking, it includes mobile phones, notebooks, tablet computers, smart game consoles, and even car computers, wearable smart devices, etc. Mobile intelligent terminals have the ability to access the Internet, usually equipped with various operating systems, and can customize various functions according to user needs. With the popularization of smart mobile terminal electronic products such as smart phones, Bluetooth headsets, and smart tablet computers, in order to prevent the machine from being scratched and broken, it is necessary to effectively protect the product shell. The performance is all made of plastic and other soft plastic materials. When the mobile terminal is dropped from a height, the protective case is easily deformed, which makes the mobile terminal detach from the protective case, which in turn causes the mobile terminal to be dropped and damaged.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a mobile terminal protective case to solve the above technical problems.

The mobile terminal protective case of the present invention includes a main case and a metal back frame, wherein the main case sequentially includes a bottom, a transition portion and a side portion along the thickness direction of the protective case, and the side portion and the transition portion surround the bottom The transition part is located between the side part and the bottom part, and the side part, the bottom part and the transition part together form an accommodating cavity for accommodating the mobile terminal; the side of the main casing facing away from the accommodating cavity There are grooves, the grooves are distributed in the transition part along the circumferential direction of the main casing, and the grooves at the corners of the main casing extend from the transition part to the side part; the metal back frame has The shape matches the shape of the groove, and the metal back frame is used to be embedded in the groove.

In one embodiment, the groove includes side grooves and branch grooves, the side grooves are distributed in the transition portion along the circumferential direction of the main casing, and the branch grooves are located at the corners of the main casing The branch groove communicates with the side groove and extends toward the side part; the branch groove wraps the corner of the main casing.

In one embodiment, the metal back frame includes a main frame strip and branch strips, the main frame strip is used to be embedded in the side groove, and the branch strip is used to be embedded in the branch groove; When the metal back frame is embedded in the groove, the branch strip is located at the corner of the main casing, extends toward the side edge, and wraps the corner of the main casing.

In one embodiment, the main casing includes a side frame and a lower cover, and the side frame and the lower cover are integrally formed with the same material.

In one embodiment, the main casing includes 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 concave The groove is opened on the side of the side frame away from the accommodating cavity; the lower cover includes a cover body and an extension part, the extension part matches the shape of the groove, and both the extension part and the metal back frame use It is embedded in the groove, and the extension portion is located between the metal back frame and the side frame.

In one embodiment, the side of the main casing opposite to the bottom is provided with an opening, so as to facilitate the mobile terminal to be placed in the accommodating cavity; the main casing further includes: A buckling portion, one end of the buckling portion is connected with the side portion, and the other end is bent toward the opening, and is used for buckling the upper surface of the mobile terminal.

In one embodiment, the bottom is used to carry the mobile terminal, the transition part and the side part are used to surround the mobile terminal from the side, and the fastening part is used to fasten the mobile terminal from above The upper surface of the terminal; the grooves in the corners of the main housing extend from the transition portion to the side portion.

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

In one embodiment, the engaging portion includes a first contour line and a second contour line, the first contour line is close to the opening, the second contour line is away from the opening, the first contour line and the second contour line are The minimum distance between the two contour lines represents the amount of buckling; the corners of the main shell are transitioned through arcs, and the buckling portion includes a connecting portion and an arc portion that are connected in sequence along the circumferential direction of the protective shell, at least The engaging amount of one arc part is smaller than the engaging amount of the connecting part.

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

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

The mobile terminal protective shell of the present invention has the following beneficial effects:

In the mobile terminal protective case of the present invention, a groove is provided on the side of the main casing away from the accommodating cavity, the metal back frame is embedded in the groove, and the groove and the metal back frame are arranged along the circumference of the main casing. Distributed in the transition part, and extending the groove of the corner of the main shell from the transition part to the side part, so as to wrap the corner of the main shell, on the one hand, it can effectively improve the scratch resistance and anti-bending performance of the protective shell, making the The protective case is not easily deformed when it is impacted by external force, preventing the mobile terminal from falling off the protective case; Broken.

Description of drawings

FIG. 1 is a schematic diagram of an exploded structure of a mobile terminal protective case provided by an embodiment of the present invention.

FIG. 2 is a schematic diagram of an overall structure of a mobile terminal protective case provided by an embodiment of the present invention.

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

4 is a longitudinal cross-sectional view of a mobile terminal protective case at a diagonal position according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of a front structure of a mobile terminal protective case provided by an embodiment of the present invention.

FIG. 6 is a partial enlarged structural schematic diagram of a buckle part of a protective shell of a mobile terminal according to an embodiment of the present invention.

Reference number:

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

detailed description

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be 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. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

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

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary get in touch with. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element 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 similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment. In addition, it should be noted that in the cross-sectional views in the accompanying drawings, the section lines are set to more clearly describe the specific structure of the embodiments of the present invention, and in a cross-sectional view, the same section lines schematically represent the same component Or it means that different parts using the same material, the shape of the hatching, including the inclination angle and spacing distance, do not strictly follow the hatching settings for different materials in the mechanical drawing. For example, in the drawings herein, the hatched line inclined by 45° does not necessarily represent a metal material, and may also represent other non-metallic materials.

In order to solve the above problems, the present invention provides a protective case for a mobile terminal. In one embodiment, the structure of the protective case of the mobile terminal is shown in FIGS. 1 to 3 , wherein FIG. 1 is a schematic diagram of an explosion structure of the protective case, FIG. 2 is a schematic diagram of the overall structure of the protective case, and FIG. 3 is a diagonal view of the protective case. Longitudinal section cutaway view of the location. As shown in FIGS. 1 to 3 , the protective case includes a main case 100 and a metal back frame 200 . The main case 100 includes a bottom 110 , a transition portion 120 and a side portion 130 in sequence along the thickness direction of the protective case. The transition portion 120 and the side part 130 are distributed along the circumferential direction of the protective shell, the side part 130 and the transition part 120 surround the outer edge of the bottom part 110, the transition part 120 is located between the side part 130 and the bottom part 110, and the side part 130, The bottom 110 and the transition portion 120 together form an accommodating cavity 150 for accommodating the mobile terminal; a groove 160 is formed on the side of the main casing 100 away from the accommodating cavity 150 , and the groove 160 is along the circumference of the main casing 100 The direction is distributed in the transition part 120 , and the groove 160 at the corner of the main casing 100 extends from the transition part 120 to the side part 130 ; the metal back frame 200 is integrally formed, and the shape of the metal back frame 200 is the same as the shape of the groove 160 Matching, the metal back frame 200 is used to be embedded in the groove 160 of the main casing 100 through a glue dispensing process or an embedding process.

It should be noted that, in the embodiments shown in FIGS. 1 to 3 , the protective case is rectangular, the main case 100 has four corners, and the grooves 160 in each corner of the main case 100 extend from the transition portion 120 extends to the side portion 130 . It can be understood that, in other embodiments, the protective case may also be in other shapes, for example, the protective case may be triangular with three corners; or the protective case may be pentagonal with five corners , the groove 160 of each corner of the main casing 100 extends from the transition part 120 to the side part 130; or, the protective casing can also be circular or oval, in which case the outer edge of the entire main casing 100 is At the corners of the main casing 100 , the grooves 160 of the main casing 100 extend from the transition portion 120 to the entire outer edge of the main casing 100 .

As shown in FIG. 1 and FIG. 2 , the groove 160 includes a side groove 161 and four branch grooves 162 . The side grooves 161 are distributed in the transition portion 120 along the circumferential direction of the main casing 100 , and the four branch grooves 162 are respectively located in the main body 100 . At the four corners of the casing 100 , the branch grooves 162 communicate with the side grooves 161 and extend toward the side parts 130 of the corners, so that the four branch grooves 162 wrap the four corners of the main casing 100 respectively. 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 bar 210 and four branch bars 220 , and the main frame bar 210 is used to be embedded in the side groove 161 . , the four branch strips 220 are respectively used to be embedded in the four branch grooves 162; when the metal back frame 200 is embedded in the groove 160, as shown in FIG. Each of the corners extends toward the side portion 130 , so as to wrap the four corners of the main casing 100 respectively. In a specific embodiment, the metal back plate 200 is made of aluminum alloy and is integrally formed through a forging process. In another specific embodiment, the main frame bar 210 and the branch bars 220 of the metal back frame 200 are respectively formed by a forging process, and the main frame bar 210 and the branch bars 220 are detachably connected.

In the above embodiment, the integrally formed metal back frame 200 is embedded in the transition portion 120 of the main casing 100 along the circumferential direction of the protective case, and the metal back frames 200 at the four corners of the main casing 100 are inserted from the transition portion 120 It extends to the side portion 130, thereby wrapping the four corners of the main casing 100. On the one hand, the scratch resistance and anti-bending performance of the protective shell can be effectively improved, so that the protective shell is not easily deformed when it is impacted by external forces, preventing the protective shell from being easily deformed. The mobile terminal is detached from the protective case when it is dropped; on the other hand, the metal back frame 200 can also effectively disperse and absorb the impact force of any corner when the mobile terminal is dropped, so as to prevent the mobile terminal from being dropped and damaged.

In addition, as shown in FIGS. 1 to 3 , the main casing 100 includes a side frame 170 and a lower cover 180 . The side frame 170 and the lower cover 180 are respectively made of different materials. The elasticity of the side frame 170 is greater than that of the lower cover 180 . The groove 160 is opened on the side of the side frame 170 away from the accommodating cavity 150, and the corners of the side frame 170 are transitioned through arcs. The arc part 172, the arc part 172 corresponds to the corner of the main casing 100, the groove 160 extends from the transition part 120 to the side part 130 at the position of the arc part 172 of the side frame 170; the lower cover 180 includes a cover body 181 and a The extension part 182, the extension part 182 matches the shape of the groove 160, the extension part 182 and the metal back frame 200 are both used to be embedded in the groove 160, and the extension part 182 is located between the metal back frame 200 and the side frame 170, That is, the extension portion 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 portion 182 . In this way, since the elasticity of the side frame 170 is greater than the elasticity of the lower cover 180, when the protective case is impacted by an external force, the deformation of the lower cover 180 is small. The phenomenon that the metal back frame 200 is warped or separated from the main casing 100 caused by the excessive deformation of the extension portion 182 .

In a specific embodiment, the lower cover 180 and the side frame 170 are both made of plastic materials. For example, the side frame 170 can be made of a material with good elasticity such as polyurethane, elastomer rubber, etc., and the cover body 181 can be made of mechanical strength. It is made of polycarbonate with good 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 combined with the side frame 170 through an injection molding process. cover 180, and then place the formed lower cover 180 in the mold cavity of the side frame 170, and then inject the high-temperature molten material for the side frame 170, so that the side frame 170 and the lower cover 180 are combined at high temperature; The side frame 170 is injection-molded, and then the formed side frame 170 is placed in the mold cavity of the lower cover 180 , and then 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 portion 182 of the lower cover 180 is embedded in the groove 160 of the side frame 170 through the embedding process, so that the mechanical strength of the joint of the extension portion 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 joint surface of the metal back frame 200 and the extension portion 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 casing 100 through a glue dispensing process. The adhesive surface is located in the groove 160 , so that the bonding failure is not easy to occur, so that the metal back frame 200 can be firmly arranged on the main casing 100 , so as to prevent the metal back frame 200 from warping or detaching from the main casing 100 .

In another specific embodiment, the metal back frame 200 is embedded in the groove 160 of the main casing 100 through an inlay process, that is, the metal back frame 200 is placed in the forming mold cavity of the lower cover 180, and then the high-temperature molten The lower cover 180 is made of material, so that the metal back frame 200 is combined with the extension portion 182 of the lower cover 180 at a high temperature. Therefore, by embedding the metal back frame 200 in the groove 160 of the main casing 100 through the embedding process, the mechanical strength of the joint between the metal back frame 200 and the extension 182 of the lower cover 180 can be improved, and the edge of the metal back frame 200 can be avoided or avoided. detached from the main casing 100 .

It should be noted that, in the embodiments shown in FIGS. 1 to 3 , the side frame 170 and the lower cover 180 of the main casing 100 are made of different materials. It is understood that in other embodiments, such as As shown in FIG. 4 , the side frame 170 and the lower cover 180 of the main casing 100 can also be integrally formed with the same material. For example, the side frame 170 and the lower cover 180 of the main casing 100 can both be made of better mechanical strength and toughness. 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 FIG. 4 , an opening 190 is provided on the side of the main casing 100 opposite to the bottom 110 to facilitate placing the mobile terminal into the accommodating cavity 150 ; the main casing 100 also includes The buckling portion 140 is distributed along the circumference of the protective shell. One end of the buckling portion 140 is connected to the side portion 130 and the other end is bent toward the opening 190 for buckling the upper surface of the mobile terminal. As shown in FIG. 3 and FIG. 4 , the bottom 110 of the main casing 100 is used to carry the mobile terminal, the transition part 120 and the side part 130 are used to surround the mobile terminal from the side, and the fastening part 140 is used to fasten the mobile terminal from above. The upper surface of the terminal prevents the mobile terminal from detaching from the protective case from the opening 190 . In addition, as shown in FIGS. 3 and 4 , the grooves 160 at the corners of the main casing 100 extend from the transition portion 120 to the side portion 130 , but do not extend to the buckling portion 140 , which is made of plastic material. Specifically, materials such as polycarbonate, polyurethane, elastomer rubber, etc. can be used. The elasticity of the buckle portion 140 is greater than that of the metal back frame 200. The grooves 160 at the corners of the main casing 100 extend from the transition portion 120 to the side portion 130. , but does not extend to the buckle portion 140 . This arrangement has three functions. The first effect is that the protective case is not easily deformed, and the mobile terminal can be prevented from being separated from the protective case when it is impacted by an external force; the second effect is that the metal back frame 200 can effectively disperse and absorb the falling of the mobile terminal. The impact force of any corner when falling, prevents the mobile terminal from being dropped and damaged; the third effect is that since the buckle part 140 is not provided with the groove 160 and the metal back frame 200, the buckle part 140 has better deformation ability, When the user wants to take out the mobile terminal from the accommodating cavity 150 of the protective case, he uses an external force to pull the buckle portion 140, so that the buckle portion 140 is bent away from the opening 190, and the size of the opening 190 is enlarged. Take it out from the accommodating cavity 150 of the protective shell. It can be understood that when the mobile terminal is put into the accommodating cavity 150 of the protective shell, the operation process is opposite to the operation process of taking out the mobile terminal. The above-mentioned design is convenient to take out the mobile terminal from the accommodating cavity 150 of the protective shell. It is also convenient to put the mobile terminal into the accommodating cavity 150 of the protective case.

In another embodiment, in order to further facilitate taking out the mobile terminal from the accommodating cavity 150 of the protective shell, the structure of the protective shell is shown in FIG. 5 , and the partially enlarged structure of the buckle portion 140 is shown in FIG. The portion 140 includes a first contour line 141 and a second contour line 142, the first contour line 141 is close to the opening 190, the second contour line 142 is away from the opening 190, and the minimum distance between the first contour line 141 and the second contour line 142 represents the The amount of buckle; the corners of the buckle portion 140 are transitioned through an arc, and the buckle portion 140 includes a connecting portion 171 and an arc portion 172 connected in sequence along the circumferential direction of the protective shell, and the arc portion 172 corresponds to the corner of the protective shell. . As shown in FIG. 5 and FIG. 6 , the first contour line 141 and the second contour line 142 of the connecting portion 171 are parallel, the engagement amount of the connecting portion 171 is D1, and the engagement amount of the four arc portions 172 is D2. D1>D2. That is, in the embodiment shown in FIG. 5 and FIG. 6 , the buckled amount of the arc portion 172 is reduced, and when the user wants to take out the mobile terminal from the accommodating cavity 150 of the protective case, the arc is pulled by external force. The buckle portion 140 of the arc portion 172 is bent away from the opening 190, and the size of the opening 190 of the arc portion 172 is enlarged. First, a corner of the mobile terminal is separated from the accommodating cavity 150 of the protective shell. Then, the entire mobile terminal is removed from the accommodating cavity 150 of the protective case.

It should be noted that, in the embodiment shown in FIG. 5 , the engaging portions 140 of the four arc portions 172 each have a small engaging amount, and the engaging amounts of the four arc portions 172 are equal, and the user can Use an external force to pull the buckle portion 140 of any arc portion 172 , first remove a corner of the mobile terminal from the accommodating cavity 150 of the protective case, and then detach the entire mobile terminal from the accommodating cavity 150 of the protective case. It can be understood that, in other embodiments, only one buckling portion 140 of the arc portion 172 can be designed to have a smaller buckling amount, when the user wants to remove the mobile terminal from the accommodating cavity 150 of the protective case When taking out, use an external force to pull the buckling portion 140 with a small buckling amount, first remove one corner of the mobile terminal from the accommodating cavity 150 of the protective case, and then detach the entire mobile terminal from the accommodating cavity 150 of the protective case That's it. It can be understood that, in other embodiments, the two or three arc portions 172 can also be designed to have a smaller engagement amount, and the engagement amounts of the two or three arc portions 172 can be the same, Can also be different.

In one embodiment, as shown in FIG. 5 and FIG. 6 , the first contour line 141 and the second contour line 142 of the connecting portion 171 are parallel to each other, the buckle portion 140 of the arc portion 172 transitions through an arc, and the arc portion The first contour line 141 and the second contour line 142 of 172 are both quarter arc segments, the first contour line 141 of the arc portion 172 has a curvature radius of R1, and the second contour line 142 of the arc portion 172 has a curvature radius of R1. R2, R1<R2, so that the arc portion 172 has a smaller amount of engagement D2, which is convenient for the user to disengage the mobile terminal from the accommodating cavity 150 of the protective case from the corner of the protective case, that is, the arc portion 172.

It can be understood that, in the above embodiment, the operation process of putting the mobile terminal into the accommodating cavity 150 of the protective case is opposite to the operation process of taking out the mobile terminal. It is also convenient to put the mobile terminal into the accommodating cavity 150 of the protective case.

In the mobile terminal protective case of the present invention, by opening a groove 160 on the side of the main casing 100 away from the accommodating cavity 150, the metal back frame 200 is embedded in the groove 160, and the groove 160 and the metal back frame 200 are embedded along the groove 160. The circumferential direction of the main casing 100 is distributed in the transition portion 120 , and the grooves 160 at the corners of the main casing 100 are extended from the transition portion 120 to the side portion 130 , so as to wrap the corners of the main casing 100 . Effectively improve the scratch-resistant and anti-bending performance of the protective case, so that the protective case is not easily deformed when it is impacted by external forces, and prevents the mobile terminal from falling off the protective case; on the other hand, the metal back frame 200 can also effectively disperse Absorbs the impact force of the corner of the mobile terminal when it falls, and prevents the mobile terminal from being dropped and damaged.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A mobile terminal protective case, comprising:

The main casing includes a bottom, a transition portion and a side portion in sequence along the thickness direction of the protective shell, the side portion and the transition portion surround the outer edge of the bottom, and the transition portion is located between the side portion and the bottom. the side part, the bottom part and the transition part together form an accommodating cavity for accommodating the mobile terminal; the side of the main casing facing away from the accommodating cavity is provided with a groove, and the groove is along the main body. The circumferential direction of the shell is distributed in the transition portion, and the grooves in the corner portion of the main shell extend from the transition portion to the side portion; and

A metal back frame, the shape of the metal back frame matches the shape of the groove, and the metal back frame is used to be embedded in the groove.
The protective case for a mobile terminal according to claim 1, wherein the groove comprises a side groove and a branch groove, the side grooves are distributed in the transition portion along the circumference direction of the main casing, and the The branch groove is located at the corner of the main casing, the branch groove communicates with the side groove and extends toward the side edge; the branch groove wraps the corner of the main casing.
The protective case for a mobile terminal according to claim 2, wherein the metal back frame comprises a main frame strip and a branch strip, the main frame strip is used for inlaying in the side groove, and the branch strip is used for inlaid in the branch groove; when the metal back frame is inlaid in the groove, the branch strip is located at the corner of the main casing, extends toward the side edge, and wraps the main body corners of the housing.
The mobile terminal protective case according to claim 1, wherein the main casing comprises a side frame and a lower cover, and the side frame and the lower cover are integrally formed with the same material.
The mobile terminal protective case according to claim 1, wherein the main case 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 The elasticity of the lower cover; the groove is opened on the side of the side frame away from the accommodating cavity; the lower cover includes a cover body and an extension part, the extension part matches the shape of the groove, the Both the extension part and the metal back frame are used to be embedded in the groove, and the extension part is located between the metal back frame and the side frame.
The mobile terminal protective case according to any one of claims 1-5, wherein an opening is provided on the side of the main casing opposite to the bottom, so as to facilitate the mobile terminal to be placed in the accommodating cavity; The main casing further includes a buckling portion along the thickness direction of the protective casing, one end of the buckling portion is connected to the side portion, and the other end is bent toward the opening for buckling the upper surface of the mobile terminal .
The protective case for a mobile terminal according to claim 6, wherein the bottom part is used to carry the mobile terminal, the transition part and the side part are used to surround the mobile terminal from the side, and the snap-fit The part is used to fasten the upper surface of the mobile terminal from above; the groove of the corner part of the main casing extends from the transition part to the side part.
The mobile terminal protective case according to claim 7, wherein the elasticity of the buckle portion is greater than the elasticity of the metal back frame.
The protective case for a mobile terminal according to claim 7, wherein the buckle portion comprises a first contour line and a second contour line, the first contour line is close to the opening, and the second contour line is away from the opening For the opening, the minimum distance between the first contour line and the second contour line represents the amount of buckling; the corners of the main shell are transitioned through arcs, and the buckling portion includes a sequence along the circumferential direction of the protective shell. The connecting portion and the arc portion are connected, and the engagement amount of at least one arc portion is smaller than the engagement amount of the connecting portion.
The mobile terminal protective case according to claim 9, wherein the first contour line curvature radius of at least one of the arc portions is R1, and the second contour line curvature radius is R2, where R1<R2.
The mobile terminal protective case according to claim 1, wherein the metal back frame is used to be embedded in the groove through a glue dispensing process or an in-mold injection process.