CN219247894U - 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, the second limiting surface is a cylindrical cambered surface facing the center of the protective film, and the lower surface of the front frame is provided with an adhesive surface adjacent to the second limiting surface; the protective film comprises a hard film layer and a soft adhesive layer fixedly adhered to the inner side surface of the hard film layer, wherein the hard film layer is positioned between the first limiting surface and the soft adhesive layer, the distance between the adhesive surface and the first limiting surface in the thickness direction of the electronic equipment is larger than the thickness of the hard film layer, the hard film layer is detachably matched with the first limiting surface, and the soft adhesive layer is fixedly connected with the adhesive surface. The protective film can be naturally stretched during bonding, bubbles are easier to remove, and the difficulty of bonding without bubbles is reduced.

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 existing 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 with 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 part of the hard film layer, and the second limiting surface is arranged opposite to the side surface of 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 adhered to and fixed with the edge part of the soft adhesive layer. In order to preferentially remove bubbles between the hard film layer and the soft adhesive layer, the inner side surface of the hard film layer protrudes out of the fixing surface in design, but the design can cause the edge part of the soft adhesive layer to tilt towards one side deviating from the mobile phone screen, so that the soft adhesive layer forms a convex cambered surface facing the mobile phone screen. The convex cambered surface can increase the difficulty of eliminating bubbles between the protective film and the mobile phone screen even in the process of laminating and flattening, or can be completely laminated for a short time, and the edge part of the soft adhesive layer can be tilted again under the action of external impact to form local bubble defects.

Disclosure of Invention

The main purpose of this application is to propose a visor and shell membrane integral structure of electronic equipment screen, aims at solving the technical problem that the bubble is difficult to get rid of between protection membrane and the electronic equipment screen when installing in electronic equipment of the visor of current electronic equipment screen.

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,

the inner edge of the front frame is provided with an annular mounting groove, the mounting groove comprises a first limiting surface and a second limiting surface, the first limiting surface faces towards the electronic equipment, the second limiting surface is a cylindrical cambered surface facing towards the center of the protective film, and the lower surface of the front frame is provided with an adhesive surface adjacent to the second limiting surface;

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, wherein the hard film layer is positioned between the first limiting surface and the soft adhesive layer, the distance between the adhesive surface and the first limiting surface in the thickness direction of the electronic equipment is larger than the thickness of the hard film layer, the hard film layer is detachably matched with the first limiting surface, and the soft adhesive layer is fixedly connected with the adhesive surface.

Preferably, the difference between the distance between the bonding surface and the first limiting surface and the thickness of the hard film layer is greater than or equal to 0.03mm.

Preferably, the lower surface of the front frame comprises a bottom surface, the bottom surface of the front frame is provided with an exhaust groove surrounding the soft adhesive layer, the exhaust groove is communicated with the mounting groove, and the bonding surface is formed on the bottom 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, W1 is greater than or equal to 2 times W2.

Preferably, a first clearance gap is formed between the soft adhesive layer and the side surface of the exhaust groove.

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, when the cover is covered on the upper side of the electronic device screen, the height of the bottom surface of the front frame relative to the bonding surface is smaller than one surface of the soft adhesive layer, which is away from the hard film layer.

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 second 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 third clearance gap is formed between the upper positioning protrusion and the lower positioning groove in the thickness direction of the electronic equipment.

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 fourth clearance in the thickness direction of electronic equipment between the location recess.

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

Preferably, in the thickness direction of the electronic device, 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.

In the protective cover of the electronic equipment screen, the distance between the bonding surface and the first limiting surface is larger than the thickness of the hard film layer in the thickness direction of the electronic equipment, so that,

in the production stage, after the hard film layer is attached to the first limiting surface, the bonding surface can relatively protrude out of one surface of the hard film layer, which is bonded with the soft adhesive layer, so that the extrusion force applied to the edge part of the soft adhesive layer, which is matched with the bonding surface, is larger under the extrusion action of the roller, and therefore, the bonding strength of the soft adhesive layer and the front frame is higher, and the fixing strength is not required to be increased by additionally applying liquid glue so as to prevent the protective film from being 'frame-removed';

in the laminating in-process, electronic equipment is under, and the visor is last, and the protection film drives the hard film layer under the action of gravity and breaks away from first spacing face, and under the protection film was in the state of stretching naturally basically, the medial surface of protection film was comparatively level to when in electronic equipment's screen laminating, the bubble between the two was got rid of more easily, and then has reduced the degree of difficulty that the user realized "no bubble" laminating.

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. 16;

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. 19;

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 a partially enlarged structure at H in FIG. 23;

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. 26;

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 a partial enlarged structure at K in FIG. 29;

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. 32.

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, the second limiting surface 132 is a cylindrical cambered surface facing the center of the protective film 18, and the lower surface of the front frame 11 is provided with 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.

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.

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, and 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 portion of the bonding surface S2 closer to the hard film layer 182 and the soft adhesive layer 182 are actually separated from each other. In the protective cover 10 of the screen of the electronic device 200 of the present utility model, in the thickness direction of the electronic device 200, the distance between the bonding surface S2 and the first stopper surface 131 is greater than the thickness of the hard film layer 181, and thus,

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, the lower surface of the front frame 11 includes a bottom surface S1, the bottom surface of the front frame 11 is provided with an air vent groove 14 surrounding the soft adhesive layer 182, the air vent groove 14 is communicated with the mounting groove 13, and the bonding surface S2 is formed on the bottom surface of the air vent 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, 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, in order to achieve rapid air discharge and to facilitate the roller passing when rolling the soft gel layer 182, a first clearance gap is formed between the soft gel layer 182 and the side surface of the air discharge groove 14.

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, when the cover is covered on the upper side of the screen of the electronic device 200, the height of the bottom surface of the front frame 11 relative to the bonding surface S2 is smaller than the surface of the soft adhesive layer 182 facing away from the hard film layer 181. So, on the one hand, the soft glue layer 182 is rolled along other directions by the roller conveniently, on the other hand, when the higher end is attached to the lower end in the inclined posture, the bottom surface of the front frame 11 can obtain a larger swinging space on the premise of not interfering with other components, and the lower surface of the soft glue layer 182 is arranged in a relatively protruding manner, so that the screen of the electronic device 200 can be better touched to realize attachment.

The application further provides a shell-film integrated structure 100, referring to fig. 1, 2, 7, 8, 21-33, comprising a protective cover 10 and a bottom shell 20, wherein the bottom shell 20 comprises a rear frame 21 and a bottom plate 26 arranged on the rear frame 21, and the protective cover 10 is the protective cover 10 of the screen of the electronic device 200; 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 of the front frame 11 and the top surface of the rear frame 21 are disposed opposite to each other in the thickness direction of the electronic device 200 and formed with a second 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 third 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 third clearance G3 can prevent the matching between the upper positioning protrusion 15 and the lower positioning groove 23 from affecting the fit between the height of the cavity 30 between the protective film 18 and the bottom plate 26 of the bottom case 20 and the thickness of the electronic device 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 fourth 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 cooperation of the lower positioning protrusions 22a,22b and the upper positioning grooves 12a,12b can help the user to position the protective cover 10 in cooperation with the positioning cooperation between the upper positioning protrusion 15 and the lower positioning groove 23, so as to make a mat for the subsequent bonding work. The fourth clearance G2 is provided to prevent the fit between the lower positioning projections 22a,22b and the upper positioning grooves 12a,12b 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 apparatus 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 third gap G3 and the fourth gap G2 are each closer to the protective film 18 than the second 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 second gap G1 at a further outer position as much as possible and to make the protective film 18 easily attached, the third gap and the fourth gap are larger than the second gap in the thickness direction of the electronic apparatus 200.

Further, 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. 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.

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, a 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 protective cover 10 of the electronic device 200 of the present utility model may have a plurality of notches, such as notches with smaller widths for adapting to 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. By arranging one circle or a plurality of sections of gap G5 on the periphery of the hard film layer 181, when the corresponding position of the front frame 11 is subjected to inward extrusion acting force, the lateral deformation of the front frame 11 can be isolated by the gap G5, and the lateral stress transferred to the edge of the hard film layer 181 is smaller; and when the corresponding position of the front frame 11 is subjected to downward extrusion acting force, the longitudinal deformation of the front frame 11 can be isolated by the clearance G5, so that the protective film 18 can keep the original attaching state in both cases, and the defect of forming white edges in the use process of the protective cover 10 is avoided.

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 clearance G5 is D2, and D2 is less than half D1.

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

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.

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,

the inner edge of the front frame is provided with an annular mounting groove, the mounting groove comprises a first limiting surface and a second limiting surface, the first limiting surface faces towards the electronic equipment, the second limiting surface is a cylindrical cambered surface facing towards the center of the protective film, and the lower surface of the front frame is provided with an adhesive surface adjacent to the second limiting surface;

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, wherein the hard film layer is positioned between the first limiting surface and the soft adhesive layer, the distance between the adhesive surface and the first limiting surface in the thickness direction of the electronic equipment is larger than the thickness of the hard film layer, the hard film layer is detachably matched with the first limiting surface, and the soft adhesive layer is fixedly connected with the adhesive surface.

2. The protective cover of claim 1, wherein a difference between a distance between the adhesive surface and the first limiting surface and a thickness of the hard film layer is greater than or equal to 0.03mm.

3. The protective cover of claim 1, wherein the lower surface of the front bezel includes a bottom surface, the bottom surface of the front bezel is provided with an air vent groove surrounding the soft adhesive layer, the air vent groove communicates with the mounting groove, and the adhesive surface is formed on the bottom surface of the air vent groove.

4. The protective cover of claim 3, 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.

5. The protective cover of an electronic device screen of claim 4, wherein W1 is greater than or equal to 2 times W2.

6. The protective cover of claim 3, wherein a first clearance gap is formed between the soft gel layer and the side of the vent slot.

7. The protective cover of the electronic device screen of claim 6, wherein the front frame is a rectangular frame and comprises two first long frame strips arranged oppositely and two first short frame strips arranged oppositely, 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.

8. The protective cover of the electronic device screen according to claim 7, wherein a thickness between a bottom surface and a top surface of the front bezel is 1.5 to 3 times a thickness of the protective film, and a bottom surface of the exhaust duct 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.

9. The protective cover of an electronic device screen as recited in claim 8, wherein a middle portion of each of the first long frame strips is provided with two upper positioning protrusions spaced apart in a length direction of the first long frame strip, and one upper positioning groove is provided between the two upper positioning protrusions.

10. The protective cover of any one of claims 6-9, wherein a height of the bottom surface of the front bezel relative to the adhesive surface is less than a surface of the soft adhesive layer facing away from the hard film layer when the protective cover is closed to an upper side of the electronic device screen.

11. 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 1-10; 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 second clearance gap, and/or

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

12. The integrated shell and film structure of claim 11, 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 third clearance gap is formed between the upper positioning protrusion and the lower positioning groove in a thickness direction of the electronic device.

13. The integrated shell and film structure of claim 12, 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 fourth clearance is formed between the lower positioning protrusion and the upper positioning groove in a thickness direction of the electronic device.

14. The housing membrane integrated structure of claim 13 wherein the third gap and the fourth gap are each closer to the protective membrane than the second gap in a direction parallel to and toward a center of the electronic device screen; and in the thickness direction of the electronic equipment, the third clearance gap and the fourth clearance gap are larger than the second clearance gap.

15. The integrated structure of the casing film according to claim 14, wherein in a thickness direction of the electronic device, a height of a bottom surface of the front bezel is close to a height of an inner side surface of the protective film, and a thickness between the bottom surface and a top surface of the front bezel 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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