CN219204546U - Protective cover and shell film integrated structure of electronic equipment screen - Google Patents

Abstract

The embodiment of the application discloses a protective cover and shell film integrated structure of an electronic equipment screen, which comprises a front frame and a protective film, wherein the front frame is arranged at the outer edge of the protective film, an annular mounting groove is formed in the inner edge of the front frame, the mounting groove comprises a first limiting surface and a second limiting surface, the first limiting surface faces towards the electronic equipment, and the second limiting surface is a cylindrical cambered surface facing the center of the protective film; the protective film comprises a hard film layer and a soft adhesive layer adhered and fixed with the inner side surface of the hard film layer, the hard film layer is positioned between the first limiting surface and the soft adhesive layer, and a first clearance gap is formed between the outer peripheral surface of the hard film layer and the second limiting surface; the soft adhesive layer is fixedly connected with the lower surface of the front frame. According to the utility model, the first clearance is arranged for isolation, so that the transverse stress transmitted from the transverse deformation of the front frame to the edge of the hard film layer is small, the original attaching state of the protective film is kept, and the defect of white edge formation in the use process of the protective cover is avoided.

Description

Protective cover and shell film integrated structure of electronic equipment screen

Technical Field

The application relates to the technical field of electronic equipment protection accessories, in particular to a protective cover and shell film integrated structure of an electronic equipment screen.

Background

Currently, the main mobile phone protection fittings are divided into two directions, one is used for protecting a mobile phone screen, and the other is used for protecting a mobile phone body. From the aspect of product form, the method can be divided into protecting only the mobile phone screen, protecting only the mobile phone body, fully wrapping the mobile phone, and protecting both the mobile phone screen and the mobile phone body.

In order to separately protect a mobile phone screen, it is common practice to apply a film, such as a soft film or a hard film, on the mobile phone screen, wherein the hard film is more popular than the soft film, but the hard film edge is easily broken. In order to solve the problem that the edge of the hard film is easy to fracture, the prior art proposes to provide a protective cover of the frame at the edge of the hard film.

In order to individually protect the body of a mobile phone, for example, to protect the side or "side+back" of the body, the prior art correspondingly proposes an individual protection frame or bottom shell comprising a bottom plate and a protection frame disposed around the bottom plate.

In order to protect the mobile phone screen and the mobile phone body at the same time, the prior art proposes a shell-film integrated structure of a protective cover and a bottom shell, and the product is divided into two technical routes, wherein an air layer exists between the protective film of the protective cover and the mobile phone screen in a non-bonding way; the other is that the protective film of the protective cover is bonded to the screen of the mobile phone (hereinafter referred to as bonding type). The former has low technical difficulty, but has poor display and touch effect; the latter is technically difficult, but can ensure optimal display and touch effects.

The prior protective cover comprises a protective film and a frame arranged on the periphery of the protective film, wherein the protective film comprises a hard film layer and a soft adhesive layer adhered and fixed to the inner side surface of the hard film layer, an L-shaped mounting groove is formed in the inner edge of the frame, the mounting groove comprises a first limiting surface and a second limiting surface, the first limiting surface is attached to the edge of the hard film layer, the second limiting surface is opposite to the side surface of the hard film layer, and the second limiting surface is directly or indirectly abutted to the hard film layer. And a fixing surface adjacent to the second limiting surface is further arranged on one side of the frame, facing the mobile phone, and is attached to the edge part of the soft adhesive layer. However, when the frame is pressed, the transverse stress of the frame is transferred to the hard film layer, so that the hard film layer is deformed, and bubbles are locally generated to form a defect of white edge.

In the prior art of indirect abutting, a gap is formed between the second limiting surface and the side surface of the hard film layer, the frame is also provided with an annular side wall at the outer edge adjacent to the fixing surface, in order to realize the effect of a narrow frame, in order to ensure the width of the annular side wall, the width of the fixing surface needs to be narrowed slightly, thereby,

on one hand, the width of the fixing surface, which is attached to the edge part of the soft adhesive layer, is narrower, so that the hard film layer is difficult to fix by solely depending on the fixing strength between the soft adhesive layer and the fixing surface;

on the other hand, the arrangement of the annular side wall prevents the roller from pressing the soft adhesive layer so as to tightly adhere the soft adhesive layer and the fixing surface.

For such protective covers, the actual production process is as follows: firstly, the protective cover is overturned and placed on the workbench so that the first limiting surface of the mounting groove faces upwards, and then a hard film layer and a soft adhesive layer are sequentially paved. In this step, the edge portion of the soft adhesive layer is overlapped on the fixing surface but is in a non-tightly adhered state, and the hard film layer is easily peeled off from the frame. In order to increase the connection strength of the protective film and the frame, the annular side wall protrudes out of the soft adhesive layer, and a glue storage groove is formed between the side surface of the soft adhesive layer and the annular side wall. In the subsequent process, fluid glue needs to be applied into the glue storage groove, and the glue can infiltrate a gap between the soft glue layer and the fixed surface and further fill a gap between the second limiting surface of the mounting groove and the hard film layer, so that after the fluid glue is solidified, the second limiting surface is indirectly abutted with the hard film layer through the solidified glue. Therefore, when the frame is pressed, transverse stress of the frame is transferred to the hard film layer, so that the hard film layer is deformed, bubbles are generated locally, and the defect of white edge is formed.

Disclosure of Invention

The main objective of the present application is to provide a protective cover and shell film integrated structure of an electronic device screen, which aims to solve the technical problem that when the protective cover of the existing electronic device screen is mounted on an electronic device and the frame of the protective cover is pressed, the protective film is prone to generate bubbles locally to form the defect of 'white edge'.

In order to achieve the above object, the protective cover of the electronic device screen provided by the present application comprises a front frame and a protective film, wherein the front frame is disposed at the outer edge of the protective film,

an annular mounting groove is formed in the inner edge of the front frame, the mounting groove comprises a first limiting surface and a second limiting surface, the first limiting surface faces towards the electronic equipment, and the second limiting surface is a cylindrical cambered surface facing towards the center of the protective film;

the protective film comprises a hard film layer and a soft adhesive layer adhered and fixed with the inner side surface of the hard film layer, the hard film layer is positioned between the first limiting surface and the soft adhesive layer, and a first clearance gap is formed between the outer peripheral surface of the hard film layer and the second limiting surface; the soft adhesive layer is fixedly connected with the lower surface of the front frame.

Preferably, the width of the first limiting surface is D1, the width of the first clearance gap is D2, and D2 is less than half of D1.

Preferably, the width of the first gap is greater than or equal to 10 microns.

Preferably, an exhaust groove surrounding the soft adhesive layer is formed in the bottom surface of the front frame, and the exhaust groove is communicated with the mounting groove; the soft adhesive layer is fixedly connected with the bottom surface of the exhaust groove, and a second clearance gap is formed between the soft adhesive layer and the side surface of the exhaust groove.

Preferably, the width of the single side of the annular area of the soft adhesive layer, which is adhered to the front frame, is W1, the width of the single side of the annular area of the hard film layer, which is embedded into the mounting groove, is W2, and W1 is greater than W2.

Preferably, the front frame is a rectangular frame and comprises two first long frame strips which are oppositely arranged and two first short frame strips which are oppositely arranged, and the two first long frame strips and the two first short frame strips are connected end to form the rectangular frame;

and each first long frame strip is provided with an upper positioning protrusion, and the bottom surface of each first short frame strip is left empty or provided with a groove so as to be flush with or higher than the bottom surface of each first long frame strip.

Preferably, the thickness between the bottom surface and the top surface of the front frame is 1.5 times to 3 times that of the protective film, the bottom surface of the exhaust groove is provided with an upper positioning groove, and the depth of the upper positioning groove is smaller than the height of the upper positioning protrusion.

Preferably, two upper positioning protrusions are arranged at intervals in the length direction of the first long frame strip in the middle of each first long frame strip, and one upper positioning groove is arranged between the two upper positioning protrusions.

Preferably, the hard film layer and the first limiting surface can be movably matched.

The application also provides a shell and film integrated structure, which comprises a protective cover and a bottom shell, wherein the bottom shell comprises a rear frame and a bottom plate arranged on the rear frame, and the protective cover is the protective cover of the electronic equipment screen; the bottom plate is arranged opposite to the protective film of the protective cover, and the bottom shell and the protective cover are enclosed to form a containing cavity for containing electronic equipment;

the inner side surface of the protective film is fixedly bonded with the screen of the electronic equipment, and the bottom shell is fixedly connected with the electronic equipment;

the bottom surface of the front frame and the top surface of the rear frame are arranged oppositely in the thickness direction of the electronic equipment and are provided with a third clearance gap, and/or

The bottom case is elastically contacted with the protective cover in a thickness direction of the electronic device.

Preferably, an upper positioning protrusion is arranged on the bottom surface of the front frame, a lower positioning groove is arranged on the top surface of the rear frame, and a fourth clearance is formed between the upper positioning protrusion and the lower positioning groove in the thickness direction of the electronic equipment.

Preferably, the third gap is closer to the protective film than the fourth gap in a direction parallel to the screen of the electronic device and toward the center of the screen of the electronic device; in the thickness direction of the electronic equipment, the fourth clearance is larger than the third clearance.

Preferably, the top surface of back frame is equipped with down the location arch, the bottom surface of preceding frame corresponds down the location arch is equipped with the location recess, down the location arch is located go up the location recess, just down the location arch with go up be formed with fifth clearance in the thickness direction of electronic equipment between the location recess.

Preferably, the fifth gap is closer to the protective film than the third gap in a direction parallel to the electronic device screen and toward the center of the electronic device screen; in the thickness direction of the electronic device, the fifth clearance is larger than the third clearance.

Preferably, an upper positioning protrusion is arranged on the bottom surface of the front frame, a lower positioning groove is arranged on the top surface of the rear frame, and a fourth clearance is formed between the upper positioning protrusion and the lower positioning groove in the thickness direction of the electronic equipment;

the top surface of the rear frame is provided with a lower positioning bulge, the bottom surface of the front frame is provided with an upper positioning groove corresponding to the lower positioning bulge, the lower positioning bulge is positioned in the upper positioning groove, and a fifth clearance is formed between the lower positioning bulge and the upper positioning groove in the thickness direction of the electronic equipment;

in the thickness direction of the electronic equipment, the height of the bottom surface of the front frame is close to the height of the inner side surface of the protective film, and the thickness between the bottom surface and the top surface of the front frame is 1.5 times to 3 times that of the protective film; the height of the upper positioning bulge is larger than that of the lower positioning bulge.

According to the protective cover of the electronic equipment, the circle of first avoidance gap is arranged on the periphery of the hard film layer, so that when the front frame is subjected to inward extrusion acting force, the transverse deformation of the front frame can be isolated by the first avoidance gap, and the transverse stress transmitted to the edge of the hard film layer is smaller, so that the protective film is kept in an original attaching state, and the defect of forming a white edge in the use process of the protective cover is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a three-dimensional structure of a shell-membrane integrated structure matched with a mobile phone;

FIG. 2 is a schematic diagram of an exploded construction of the structure of FIG. 1;

FIG. 3 is a schematic view of a partial enlarged structure at A in FIG. 2;

FIG. 4 is a schematic view of a partial enlarged structure at B in FIG. 2;

FIG. 5 is a schematic view of a partial enlarged structure at C in FIG. 2;

FIG. 6 is a schematic view of a partial enlarged structure at D in FIG. 2;

FIG. 7 is a schematic view of another perspective view of the integrated shell-and-membrane structure of FIG. 1;

FIG. 8 is a schematic view of an exploded view of the integral structure of the shell membrane of FIG. 7;

FIG. 9 is an exploded view of the bottom shell of FIG. 8;

FIG. 10 is a schematic view of an explosion structure of the protective cover in FIG. 8;

FIG. 11 is a rear front projection view of the protective cover of FIG. 8;

FIG. 12 is a schematic cross-sectional view taken along line XII-XII in FIG. 11;

FIG. 13 is a schematic view of the right side of FIG. 12;

FIG. 14 is a schematic view of a partial enlarged structure at E in FIG. 13;

FIG. 15 is a schematic cross-sectional view taken along the line XV-XV in FIG. 11;

FIG. 16 is a schematic view of the right side of FIG. 12;

FIG. 17 is a schematic view of a partially enlarged structure at F in FIG. 13;

FIG. 18 is a schematic view of the cross-sectional structure taken along line XVIII-XVIII in FIG. 11;

FIG. 19 is a schematic view of the right side of FIG. 12;

FIG. 20 is a schematic view of a partially enlarged structure at G in FIG. 13;

FIG. 21 is a schematic view of a front projection of the structure of FIG. 1;

FIG. 22 is a schematic cross-sectional view taken along line XXII-XXII in FIG. 21;

FIG. 23 is a schematic view of a portion of the right side of the structure of FIG. 22;

FIG. 24 is a schematic view of the structure of FIG. 22 at H in a partially enlarged manner;

FIG. 25 is a schematic cross-sectional view taken along line XXV-XXV in FIG. 21;

FIG. 26 is a schematic view of a portion of the right side of the structure of FIG. 22;

FIG. 27 is a schematic view of a partial enlarged structure at J in FIG. 22;

FIG. 28 is a schematic cross-sectional view taken along line XXVIII-XXVIII in FIG. 21;

FIG. 29 is a schematic view of a portion of the right side of the structure of FIG. 22;

FIG. 30 is a schematic view of the structure of FIG. 22 at K in a partially enlarged manner;

FIG. 31 is a schematic cross-sectional view of the structure taken along line XXXI-XXXI in FIG. 21;

FIG. 32 is a schematic view of a portion of the right side of the structure of FIG. 22;

fig. 33 is a partially enlarged schematic view of the structure at L in fig. 22.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

To achieve the above object, referring to fig. 1, 2, and 10 to 20, a protective cover 10 for a screen of an electronic device 200 according to the present application includes a front frame 11 and a protective film 18, wherein the front frame 11 is disposed at an outer edge of the protective film 18,

the inner edge of the front frame 11 is provided with an annular mounting groove 13, the mounting groove 13 comprises a first limiting surface 131 and a second limiting surface 132, the first limiting surface 131 faces the electronic equipment 200, and the second limiting surface 132 is a cylindrical cambered surface facing the center of the protective film 18;

the protective film 18 includes a hard film layer 181 and a soft adhesive layer 182 adhered and fixed to the inner side surface of the hard film layer 181, the hard film layer 181 is located between the first limiting surface 131 and the soft adhesive layer 182, and a first gap G5 is formed between the outer peripheral surface of the hard film layer 181 and the second limiting surface 132; the soft adhesive layer 182 is fixedly connected with the lower surface of the front frame 11.

In this embodiment, the front frame 11 is usually an injection molded part, and the protective film 18 may have a multi-layer structure. When the protective film 18 is 3 or more layers, the hard film layer 181 refers to the whole of the remaining layers except the soft adhesive layer 182. The hard film 181 is usually toughened glass, and the soft adhesive layer 182 is self-adhesive. The rear frame 21 is typically an injection-molded part and a metal frame, and if the rear frame 21 is an injection-molded part, the rear edge and the bottom plate 26 may be injection-molded twice. To facilitate displaying a trademark or pattern on the back of the electronic device 200, the base plate 26 may be provided in a transparent shape. The electronic device 200 is typically a cell phone, but the electronic device 200 may also be other portable devices having a display screen.

The protective cover 10 of the electronic device 200 of the present utility model may have a circular mounting groove 13 with a plurality of notches, for example, a notch with a smaller width to accommodate the sound outlet or microphone entrance of the electronic device. It is understood that the gap G5 may be a complete circle or several segments, as long as it is formed in a predetermined area. For example, in order to focus on preventing white edges from occurring on a certain long side of a rectangular electronic device, the gap G5 may be formed only on the long side; and on the opposite side, the outer circumferential surface of the soft film layer 181 may be in contact with the second limiting surface 132. Through setting up one or a plurality of sections of first clearance G5 that keep away in the periphery at hard rete 181 to when the corresponding position of preceding frame 11 received inwards extrusion effort, the lateral deformation of preceding frame 11 can be kept away from clearance G5 and keep away the lateral stress at border to the hard rete 181 less, and when the corresponding position of preceding frame 11 received decurrent extrusion effort, the longitudinal deformation of preceding frame 11 also can be kept away from clearance G5 and keep away from clearance G5, and then make protection film 18 keep original laminating state, avoided the defect that forms the blank in the protective cover 10 use.

Further, referring to fig. 14, 17 and 20, in order to reduce the risk of detachment of the protective film 18 layer from the front bezel 11, the width of the first limiting surface 131 is D1, the width of the first clearance gap is D2, and D2 is less than half D1.

Further, in order to secure the isolation effect of the first gap G5, the width of the first gap is greater than or equal to 10 μm.

Further, the bottom surface of the front frame 11 is provided with an exhaust groove 14 surrounding the soft adhesive layer 182, and the exhaust groove 14 is communicated with the mounting groove 13; the soft rubber layer 182 is fixedly connected with the bottom surface of the exhaust groove 14, and a second clearance gap G4 is formed between the soft rubber layer 182 and the side surface of the exhaust groove 14.

In this embodiment, by providing the air exhaust groove 14, on one hand, the flexibility of the edge portion of the front frame 11 can be increased, so that the flexibility of the whole protective cover 10 is increased, and the attaching operation is convenient; on the other hand, the exhaust between the protective cover 10 and the screen of the electronic device 200 can be quickened, so that the time for the attaching operation is less, and the use experience of a user is further optimized.

Further, in order to ensure the connection strength between the soft adhesive layer 182 and the front frame 11, the additional application of liquid glue to increase the fixing strength to prevent the protective film 18 from "frame-falling off" is avoided, the width of the single side of the annular region of the soft adhesive layer 182 bonded to the front frame 11 is W1, the width of the single side of the annular region of the hard film layer 181 embedded into the mounting groove 13 is W2, and W1 is greater than W2.

Further, referring to fig. 10 again, the front frame 11 is a rectangular frame, and includes two first long frame strips 16 arranged oppositely, and two first short frame strips 17 arranged oppositely, where the two first long frame strips 16 and the two first short frame strips 17 are connected end to form a rectangular frame;

each first long frame strip 16 is provided with an upper positioning protrusion 15, and the bottom surface of the first short frame strip 17 is left empty or is provided with a groove to be flush with or higher than the bottom surface of the first long frame strip 16.

In this embodiment, the front bezel 11 is configured as a rectangular frame so as to better fit a rounded rectangular tablet phone or electronic device 200. In the first long frame strip 16 and the first short frame strip 17, the bottom surface of the first short frame strip 17 (based on the downward state of the first limiting surface 131) is left blank or is provided with a groove to be flush with or higher than the bottom surface of the first long frame strip 16, so that the roller for pressing adhesion can conveniently roll the soft adhesive layer 182 along the direction perpendicular to the first short frame strip 17, and the connection strength of the soft adhesive layer 182 and the front frame 11 is ensured.

Further, referring to fig. 12 to 20, the thickness between the bottom surface S1 and the top surface S3 of the front bezel 11 is 1.5 to 3 times the thickness of the protection film 18, and the bottom surface of the exhaust groove 14 is provided with upper positioning grooves 12a,12b, and the depth of the upper positioning grooves 12a,12b is smaller than the height of the upper positioning protrusion 15. In the present embodiment, since the thickness of the protective film 18 is generally smaller, the thickness of the front bezel 11 is limited to a smaller value with reference to the thickness of the protective film 18, so that the protective cover 10 as a whole tends to be more plate-like in structure, and thus the protective cover 10 is easier to bend, i.e., the attaching operation of the protective film 18 is easier to be performed while preventing the protective film 18 from being taken off the frame and protecting the edge portion of the protective film 18. The depth of the upper positioning grooves 12a,12b is smaller than the height of the upper positioning protrusion 15, so that the influence of the upper positioning grooves 12a,12b on the structural strength of the front frame 11 can be reduced, and the positioning stroke of the upper positioning protrusion 15 can be increased. The upper positioning grooves 12a,12b are provided in the air discharge groove 14 to facilitate air discharge when they are engaged with the lower positioning protrusions 22a,22 b.

Further, two upper positioning projections 15 are provided at the middle of each first long frame strip 16 at intervals in the longitudinal direction of the first long frame strip 16, and one upper positioning groove 12a,12b is provided between the two upper positioning projections 15. In this embodiment, the upper positioning protrusions 15 and the upper positioning grooves on each first long frame strip 16 are arranged at intervals, so that the relevant positioning structures are more complementary, and therefore, a better positioning effect can be obtained. It will be appreciated that the upper positioning projections 15 and the upper positioning recesses 12a,12b are not limited to only being engaged with the bottom case 20, and that both structures may be engaged directly with corresponding structures on the electronic device 200.

Further, the hard film layer 181 is movably matched with the first limiting surface 131. Therefore, when the outer edge of the front frame 11 is acted by the extrusion force, the first limiting surface 131 can move tangentially relative to the hard film layer 181, so that deformation is prevented from being transferred to the hard film layer 181, the influence on the laminating degree of the hard film layer 181 is reduced, and white edges are prevented from occurring on the edge of the hard film layer 181.

The present application further proposes a shell-film integrated structure 100, referring to fig. 1, 2, 7, 8, and 21 to 33, where the shell-film integrated structure 100 includes a protective cover 10 and a bottom shell 20, the bottom shell 20 includes a rear frame 21 and a bottom plate 26 disposed on the rear frame 21, and the protective cover 10 is a protective cover 10 of the screen of the electronic device 200 as above; the bottom plate 26 is arranged opposite to the protective film 18 of the protective cover 10, and the bottom shell 20 and the protective cover 10 enclose a containing cavity 30 for containing the electronic equipment 200;

the inner side surface of the protective film 18 is adhered and fixed with the screen of the electronic equipment 200, and the bottom shell 20 is fixedly connected with the electronic equipment 200;

the bottom surface S1 of the front frame 11 and the top surface S4 of the rear frame 21 are disposed opposite to each other in the thickness direction of the electronic device 200 and are formed with a third gap G1, and/or

The bottom case 20 is elastically contacted with the protective cover 10 in the thickness direction of the electronic apparatus 200.

In this embodiment, the rear frame 21 is usually an injection-molded part and a metal frame, and if the rear frame 21 is an injection-molded part, the rear edge and the bottom plate 26 may be two-shot injection-molded. To facilitate displaying a trademark or pattern on the back of the electronic device 200, the base plate 26 may be provided in a transparent shape. In the circumferential direction of the mating position between the bottom case 20 and the protection cover 10, a whole circle may be a clearance gap or a whole circle may be elastic contact, or the clearance gap and the elastic contact may be alternately arranged. The advantage of having a full circle of elastic contact in the circumferential direction of the mating position between the bottom shell 20 and the protective cover 10 is that the gap between the bottom shell 20 and the protective cover 10 can be hidden. The electronic device 200 is typically a cell phone, but the electronic device 200 may also be other portable devices having a display screen.

The fixing structure adopted by the integrated shell-film structure 100 of the present application is that the protective cover 10 and the bottom shell 20 are respectively fixedly connected with the electronic device 200, that is, the bottom shell 20 is not fixed with the electronic device 200 through the protective cover 10, and,

the height setting of the front frame 11 of the protective cover 10 and the height setting of the rear frame 21 of the bottom case 20 are such that the bottom case 20 and the protective cover 10 form a clearance gap in the thickness direction of the electronic apparatus 200; and/or

The structure and the material of the front frame 11 of the protective cover 10 and the structure and the material of the rear frame 21 of the bottom shell 20 enable the bottom shell 20 and the protective cover 10 to form elastic contact in the thickness direction of the electronic device 200;

therefore, the height of the cavity 30 between the protective film 18 of the protective cover 10 and the bottom plate 26 of the bottom case 20 is always in a state of being properly matched with the thickness of the electronic device 200 on the premise that the protective film 18 is not excessively deformed by the adaptive change of the clearance and/or the elastic deformation of the preset degree. Without extrusion and stretching, the protective film 18 can easily expel air bubbles when attached, i.e., the difficulty of installing the protective cover 10 without air bubbles is reduced, and the user experience is improved.

Further, the bottom surface of the front frame 11 is provided with an upper positioning protrusion 15, the top surface of the rear frame 21 is provided with a lower positioning groove 23, and a fourth avoidance gap G3 is formed between the upper positioning protrusion 15 and the lower positioning groove 23 in the thickness direction of the electronic device 200.

In this embodiment, the upper positioning protrusion 15 and the lower positioning groove 23 cooperate to help the user position the protective cover 10 for subsequent fitting operation. The fourth clearance is provided to avoid that the matching between the upper positioning protrusion 15 and the lower positioning groove 23 affects the adaptation of the height of the cavity 30 between the protective film 18 and the bottom plate 26 of the bottom case 20 to the thickness of the electronic device 200.

Further, in order to hide the third gap G1 at a further outer position as much as possible while ensuring that the protective film 18 is easily attached, the third gap G1 is closer to the protective film 18 than the fourth gap G3 in a direction parallel to the screen of the electronic apparatus 200 and toward the center of the screen of the electronic apparatus 200; the fourth gap G3 is larger than the third gap G1 in the thickness direction of the electronic apparatus 200.

Further, the top surface of the rear frame 21 is provided with lower positioning protrusions 22a,22b, the bottom surface of the front frame 11 is provided with upper positioning grooves 12a,12b corresponding to the lower positioning protrusions 22a,22b, the lower positioning protrusions 22a,22b are located in the upper positioning grooves 12a,12b, and a fifth gap G2 is formed between the lower positioning protrusions 22a,22b and the upper positioning grooves 12a,12b in the thickness direction of the electronic device 200.

In this embodiment, the lower positioning protrusions 22a,22b cooperate with the upper positioning grooves 12a,12b to help the user position the protective cover 10 for subsequent fitting work. The second clearance is provided to avoid that the matching between the upper positioning protrusion 15 and the lower positioning groove 23 affects the adaptation degree of the height of the cavity 30 between the protective film 18 and the bottom plate 26 of the bottom case 20 to the thickness of the electronic device 200.

Further, in a direction parallel to the screen of the electronic apparatus 200 and toward the center of the screen of the electronic apparatus 200, the fifth gap G2 is closer to the protective film 18 than the third gap G1; since the further away from the electronic apparatus 200 in the direction parallel to the screen of the electronic apparatus 200 and toward the center of the screen of the electronic apparatus 200, the amount of deformation thereby transmitted to the protective film 18 is relatively small even if the avoidance gap is eliminated on the one hand and the pressing occurs at that position; on the other hand, the device is easier to observe from the outside. Therefore, in order to hide the third gap G1 at a further outer position as much as possible and to make the protective film 18 easily attached, the fifth gap G2 is larger than the third gap G1 in the thickness direction of the electronic apparatus 200.

Further, an upper positioning protrusion 15 is provided on the bottom surface of the front frame 11, a lower positioning groove 23 is provided on the top surface of the rear frame 21, and a fourth avoidance gap G3 is formed between the upper positioning protrusion 15 and the lower positioning groove 23 in the thickness direction of the electronic device 200;

the top surface of the rear frame 21 is provided with lower positioning protrusions 22a,22b, the bottom surface of the front frame 11 is provided with upper positioning grooves 12a,12b corresponding to the lower positioning protrusions 22a,22b, the lower positioning protrusions 22a,22b are positioned in the upper positioning grooves 12a,12b, and a fifth avoidance gap G2 is formed between the lower positioning protrusions 22a,22b and the upper positioning grooves 12a,12b in the thickness direction of the electronic device 200;

in the thickness direction of the electronic apparatus 200, the height of the bottom surface of the front bezel 11 is close to the height of the inner side surface of the protective film 18, and the thickness between the bottom surface S1 and the top surface S3 of the front bezel 11 is 1.5 times to 3 times that of the protective film 18; the height of the upper positioning projections 15 is greater than the height of the lower positioning projections 22a,22 b.

In this embodiment, the height of the upper positioning protrusion 15 is greater than that of the lower positioning protrusions 22a and 22b, so that in the attaching process, the upper positioning protrusion 15 and the lower positioning groove 23 can form a positioning structure in advance and become a main positioning structure, and in the rear process of the assembling process from top to bottom of the front frame 11, the lower positioning protrusions 22a and 22b are matched with the upper positioning protrusion 15 to further fine-tune the position of the protective cover 10, thereby not only facilitating the initial alignment of the positioning operation, but also ensuring the positioning accuracy.

Since the thickness of the protective film 18 is generally small, the thickness of the front bezel 11 is limited to a small value with reference to the thickness of the protective film 18, so that the protective cover 10 as a whole tends to be more plate-like in structure, and thus the protective cover 10 is easier to bend, that is, the protective film 18 is prevented from being taken off the frame, the edge portion of the protective film 18 is protected, and the attaching operation of the protective film 18 is also easy to be performed.

The arrangement of the fourth clearance and the fifth clearance can correspondingly avoid that the positioning fit between the upper positioning projection 15 and the lower positioning groove 23 and the positioning fit between the lower positioning projections 22a,22b and the upper positioning grooves 12a,12b affect the degree of adaptation of the height of the cavity 30 between the protective film 18 and the bottom plate 26 of the bottom case 20 to the thickness of the electronic apparatus 200.

Further, referring to fig. 6 again, the lower positioning groove 23 includes a first groove wall surface 231, a bottom wall surface 232 and two second groove wall surfaces 233, the first groove wall surface 231 faces the center of the cavity 30, the bottom wall surface 232 and the upper positioning protrusion 15 are spaced apart to form a third clearance, and the two second groove wall surfaces 233 are oppositely arranged in the circumferential direction of the rear frame 21;

at least one of the junctions of the first groove wall surface 231 and the top surface of the rear frame 21 and the junctions of the two second groove wall surfaces 233 and the top surface of the rear frame 21 is provided with a guiding inclined surface or an arc surface for expanding the upper opening of the lower positioning groove 23.

In this embodiment, when the protection cover 10 is assembled from top to bottom, if the upper positioning protrusion 15 deviates from the center of the lower positioning groove 23 and abuts against the guiding inclined plane or the cambered surface, the upper positioning protrusion 15 can automatically slide into the lower positioning groove 23 under the guiding action of the guiding inclined plane or the cambered surface.

Further, referring to fig. 2, 3, 5 and 6, in order to increase friction between the rear bezel 21 and the side surface of the electronic device 200, the inner wall surface of the rear bezel 21 is provided with a plurality of sets of friction lines extending in the circumferential direction of the rear bezel 21. In order to facilitate uncovering of the protective cover 10 or the bottom shell 20, a disassembling groove is arranged at the joint of the top surface and the outer side surface of the rear frame 21, and in order to increase the force arm, the disassembling groove is arranged at four end corners of the rear frame 21.

Further, referring to fig. 1, 2, 8, 10, 21, and 31 to 33, the protective film 18 is notched corresponding to the sound hole of the electronic device 200 to more fully cover the display screen of the electronic device 200. The front frame 11 is provided with an air hole array corresponding to the sound holes of the electronic device 200.

Further, referring to fig. 1, 2, and 10 to 20, the lower surface of the front bezel 11 has an adhesive surface S2 adjacent to the second limiting surface 132;

the protective film 18 includes a hard film layer 181 and a soft adhesive layer 182 adhered and fixed to an inner side surface of the hard film layer 181, the hard film layer 181 is located between the first limiting surface 131 and the soft adhesive layer 182, in a thickness direction of the electronic device 200, a distance between the adhesive surface S2 and the first limiting surface 131 is greater than a thickness of the hard film layer 181, the hard film layer 181 is detachably matched with the first limiting surface 131, and the soft adhesive layer 182 is fixedly connected with the adhesive surface S2.

It can be understood that if the distance between the bonding surface S2 and the first limiting surface 131 is smaller than the thickness of the hard film layer 181 in the thickness direction of the electronic device 200, after the protective film 18 is turned over to set the first limiting surface 131 upward, the hard film layer 181 protrudes from the bonding surface S2, the soft adhesive layer 182 is obliquely overlapped with the bonding surface S2, so that a wedge-shaped cavity is formed between the bonding surface S2 and the soft adhesive layer 182, and the part of the bonding surface S2 closer to the hard film layer 182 is actually separated from the soft adhesive layer 182, in this embodiment, the distance between the bonding surface S2 and the first limiting surface 131 is larger than the thickness of the hard film layer 181 in the thickness direction of the electronic device 200, so that,

in the production stage, after the hard film layer 181 is attached to the first limiting surface 131, the bonding surface S2 may relatively protrude from the surface of the hard film layer 181 to which the soft adhesive layer 182 is bonded, so that under the extrusion action of the roller, the edge portion of the soft adhesive layer 182, which is matched with the bonding surface S2, is subjected to a larger extrusion force and can be completely attached, therefore, the bonding strength between the soft adhesive layer 182 and the front frame 11 is higher, and no additional liquid glue is required to be applied to increase the fixing strength so as to prevent the protective film 18 from "frame falling";

in the laminating process, the electronic equipment 200 is under, and visor 10 is on, and protection film 18 drives hard rete 181 under the action of gravity and breaks away from first limiting surface 131, and protection film 18 is in under the state of natural extension basically, and the medial surface of protection film 18 is comparatively level to when the screen of electronic equipment 200 is laminated, the bubble between the two is got rid of more easily, and then has reduced the degree of difficulty that the user realized "no bubble" laminating.

Further, in order to form a sufficiently large pressure difference on the soft adhesive layer 182 when the soft adhesive layer 182 is rolled, a difference between the distance between the adhesive surface S2 and the first limiting surface 131 and the thickness of the hard film layer 181 is greater than or equal to 0.03mm.

Further, referring to fig. 14, 17 and 20, in order to ensure the connection strength between the soft adhesive layer 182 and the front frame 11, the fixing strength is prevented from being increased by applying additional liquid glue to prevent the protective film 18 from being "frame-removed", the width of the single side of the annular region of the soft adhesive layer 182 bonded to the front frame 11 is W1, the width of the single side of the annular region of the hard film layer 181 embedded in the mounting groove 13 is W2, and W1 is greater than W2. Preferably, W1 is greater than or equal to 2 times W2.

Further, an upper positioning protrusion 15 is provided on the bottom surface of the exhaust slot 14, a lower positioning groove 23 is provided on the top surface of the rear frame 21, and a clearance gap G3 is formed between the upper positioning protrusion 15 and the lower positioning groove 23 in the thickness direction of the electronic device 200; a clearance gap G6 is formed between the soft adhesive layer 182 and the upper positioning protrusion 15.

In this embodiment, the upper positioning protrusion 15 and the lower positioning groove 23 cooperate to help the user position the protective cover 10 for subsequent fitting operation. The upper positioning bulge 15 is arranged on the front frame 11, so that the height of the front frame 11 is reduced on the premise of ensuring the structural strength of the front frame 11. The setting of the clearance G3 can prevent the matching between the upper positioning protrusion 15 and the lower positioning groove 23 from affecting the degree of adaptation of the height of the cavity 30 between the protective film 18 and the bottom plate 26 of the bottom case 20 to the thickness of the electronic device 200. By arranging the clearance G6, the roller can pass conveniently when the soft adhesive layer 182 is connected with the front frame 11 in a rolling way.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (15)

1. A protective cover of an electronic device screen is characterized by comprising a front frame and a protective film, wherein the front frame is arranged at the outer edge of the protective film,

an annular mounting groove is formed in the inner edge of the front frame, the mounting groove comprises a first limiting surface and a second limiting surface, the first limiting surface faces towards the electronic equipment, and the second limiting surface is a cylindrical cambered surface facing towards the center of the protective film;

the protective film comprises a hard film layer and a soft adhesive layer adhered and fixed with the inner side surface of the hard film layer, the hard film layer is positioned between the first limiting surface and the soft adhesive layer, and a first clearance gap is formed between the outer peripheral surface of the hard film layer and the second limiting surface; the soft adhesive layer is fixedly connected with the lower surface of the front frame.

2. The protective cover of the electronic device screen of claim 1, wherein the first limiting surface has a width D1, the first clearance gap has a width D2, and the D2 is less than one half of the D1.

3. The protective cover of an electronic device screen of claim 2, wherein the width of the first gap is greater than or equal to 10 microns.

4. The protective cover of the electronic device screen of claim 1, wherein the bottom surface of the front bezel is provided with an exhaust slot surrounding the soft adhesive layer, and the exhaust slot is communicated with the mounting slot; the soft adhesive layer is fixedly connected with the bottom surface of the exhaust groove, and a second clearance gap is formed between the soft adhesive layer and the side surface of the exhaust groove.

5. The protective cover of claim 4, wherein the soft adhesive layer has a width W1 on a single side of an annular region bonded to the front bezel, the hard film layer has a width W2 on a single side of an annular region embedded in the mounting groove, and the width W1 is greater than the width W2.

6. The protective cover of an electronic device screen of claim 4 or 5,

the front frame is a rectangular frame and comprises two first long frame strips which are oppositely arranged and two first short frame strips which are oppositely arranged, and the two first long frame strips and the two first short frame strips are connected end to form a rectangular frame;

and each first long frame strip is provided with an upper positioning protrusion, and the bottom surface of each first short frame strip is left empty or provided with a groove so as to be flush with or higher than the bottom surface of each first long frame strip.

7. The protective cover of the electronic device screen according to claim 6, wherein a thickness between the bottom surface and the top surface of the front bezel is 1.5 to 3 times a thickness of the protective film, the bottom surface of the exhaust groove is provided with an upper positioning groove, and a depth of the upper positioning groove is smaller than a height of the upper positioning protrusion.

8. The protective cover of claim 7, wherein two upper positioning protrusions are disposed at intervals in the length direction of the first long frame strip at the middle of each first long frame strip, and one upper positioning groove is disposed between the two upper positioning protrusions.

9. The protective cover of any one of claims 1-5, wherein the hard film layer is movably mated with the first stop surface.

10. The shell-film integrated structure comprises a protective cover and a bottom shell, wherein the bottom shell comprises a rear frame and a bottom plate arranged on the rear frame,

the protective cover is a protective cover of the electronic device screen according to any one of claims 1-9; the bottom plate is arranged opposite to the protective film of the protective cover, and the bottom shell and the protective cover are enclosed to form a containing cavity for containing electronic equipment;

the inner side surface of the protective film is fixedly bonded with the screen of the electronic equipment, and the bottom shell is fixedly connected with the electronic equipment;

the bottom surface of the front frame and the top surface of the rear frame are arranged oppositely in the thickness direction of the electronic equipment and are provided with a third clearance gap, and/or

The bottom case is elastically contacted with the protective cover in a thickness direction of the electronic device.

11. The integrated shell and film structure of claim 10, wherein an upper positioning protrusion is disposed on a bottom surface of the front frame, a lower positioning groove is disposed on a top surface of the rear frame, and a fourth clearance gap is formed between the upper positioning protrusion and the lower positioning groove in a thickness direction of the electronic device.

12. The housing membrane unitary structure of claim 11 wherein the third standoff gap is closer to the protective membrane than the fourth standoff gap in a direction parallel to and toward a center of the electronic device screen; in the thickness direction of the electronic equipment, the fourth clearance is larger than the third clearance.

13. The integrated shell and film structure of claim 10, wherein a lower positioning protrusion is disposed on a top surface of the rear frame, an upper positioning groove is disposed on a bottom surface of the front frame corresponding to the lower positioning protrusion, the lower positioning protrusion is disposed in the upper positioning groove, and a fifth avoidance gap is formed between the lower positioning protrusion and the upper positioning groove in a thickness direction of the electronic device.

14. The housing membrane unitary structure of claim 13 wherein the fifth standoff gap is closer to the protective membrane than the third standoff gap in a direction parallel to and toward a center of the electronic device screen; in the thickness direction of the electronic device, the fifth clearance is larger than the third clearance.

15. The integrated shell-and-membrane structure of claim 10, wherein the shell-and-membrane structure comprises,

an upper positioning bulge is arranged on the bottom surface of the front frame, a lower positioning groove is arranged on the top surface of the rear frame, and a fourth clearance is formed between the upper positioning bulge and the lower positioning groove in the thickness direction of the electronic equipment;

the top surface of the rear frame is provided with a lower positioning bulge, the bottom surface of the front frame is provided with an upper positioning groove corresponding to the lower positioning bulge, the lower positioning bulge is positioned in the upper positioning groove, and a fifth clearance is formed between the lower positioning bulge and the upper positioning groove in the thickness direction of the electronic equipment;

in the thickness direction of the electronic equipment, the height of the bottom surface of the front frame is close to the height of the inner side surface of the protective film, and the thickness between the bottom surface and the top surface of the front frame is 1.5 times to 3 times that of the protective film; the height of the upper positioning bulge is larger than that of the lower positioning bulge.

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