CN222147679U - Display device - Google Patents

Abstract

The utility model provides a display device, including a back plate and a back cover; the back cover includes a first back shell and a second back shell arranged adjacently; the second back shell cover is combined and fixed on the back side of the back plate, and the end of the second back shell facing the first back shell is formed on a protruding overlap portion; a clamping hole is provided on the overlap portion. A protruding clamping protrusion is formed on a side of the first back shell facing the back plate; the clamping protrusion is provided on a side edge of the first back shell facing the second back shell. The first back shell can move towards and away from the back plate, so that the edge of the first back shell facing the second back shell is overlapped forward on a side of the overlap portion facing away from the back plate, and the clamping protrusion is detachably engaged in the clamping hole, so that the first back shell can be detachably engaged on the second back shell, thereby facilitating the connection and disassembly between the first back shell and the second back shell.

Description

Display device

Technical Field

The utility model relates to the technical field of household appliances, in particular to a display device.

Background

Display devices, such as televisions, have become a necessary electrical appliance in everyday households. With the development of society, the labor cost is increased year by year, the proportion of the labor cost of the product on the whole production chain is increased, the importance of reducing the labor cost, improving the production efficiency and ensuring the production consistency is increased by more enterprises, and the method has the advantages of more vigorous industry competition, better quality and quantity maintenance and cost reduction in the home appliance industry, and becomes an important direction of survival and development of the home appliance enterprises.

The display device mainly comprises a display panel, a back plate, a rear shell and the like. The display panel is arranged on the front side wall of the backboard and used as a display screen of the display device, and the rear shell is arranged on the rear side wall of the backboard and used as part or all of the appearance surface of the rear side of the display device.

At present, the television mainly uses a rear shell to protect electronic components in the whole machine, and the sizes of all rear shells are larger. In order to reduce the mold cost and the package and transportation cost of the rear shell, the rear shell is designed into a split structure. The split type backshell is connected through the screw mainly, and this kind of connected mode is comparatively loaded down with trivial details not only during the installation, also takes time when dismantling. When the self-tapping screw is used for connection, the problems of sliding wire and the like are easy to cause, and the exposed screw also very influences the appearance of the television.

Disclosure of utility model

The present utility model is directed to a display device for facilitating connection and disconnection between rear covers.

In order to solve the technical problems, the utility model adopts the following technical scheme:

According to one aspect of the utility model, the display device comprises a back plate and a back cover, wherein a display panel used for displaying image information is arranged on the front side of the back plate, a driving part is fixed on the back surface of the back plate, the back cover is used for covering the back surface of the back plate and covers the driving part, the back cover comprises a first back shell and a second back shell which are adjacently arranged, the second back shell cover is combined and fixed on the back surface of the back plate, one end of the second back shell, which faces the first back shell, is formed on a protruding lap joint part, a clamping hole is formed in the lap joint part, a protruding clamping protrusion is formed on the side, which faces the back plate, of the first back shell, and is arranged on the side edge, which faces the second back shell, of the first back shell, and the first back shell can move close to and away from the back plate, so that the edge, which faces the second back shell, is lapped on the side, which faces the lap joint part, and the back plate, and the clamping protrusion can be separated and clamped in the clamping hole.

In some embodiments of the present application, the latch is a tongue protruding from the first rear shell, a protruding guiding portion is formed on one side of a free section of the tongue, the guiding portion overlaps the overlapping portion toward one side of the first rear shell, a first guiding surface is formed on one side of the guiding portion facing away from the first rear shell, and the first guiding surface is disposed obliquely toward the first rear shell in a direction away from the tongue.

In some embodiments of the application, a second guide surface is formed on a side of the guide portion facing the first rear housing, the second guide surface extending away from the first rear housing in a direction away from the tongue.

In some embodiments of the present application, the first rear shell can at least partially turn over relative to the back plate to drive the insert tongue to move, and the insert tongue has a space between two opposite side walls in the turning plane of the first rear shell and the corresponding side wall of the clamping hole.

In some embodiments of the present application, the clamping protrusion is a clamping post protruding from the first rear shell, a protruding rib is formed on a peripheral side of the clamping post, and the rib is attached to a peripheral side wall corresponding to the clamping hole.

In some embodiments of the application, a guide surface is formed at an end of the rib facing away from the first rear case, and the guide surface is inclined in a direction facing away from the post in a direction facing toward the first rear case.

In some embodiments of the application, the edges of the card holes are formed with protruding flanges that extend away from the first rear shell.

In some embodiments of the present application, the second rear case is disposed at left and right sides of the first rear case, the first rear case includes an upper portion and a lower portion, the catching protrusion is formed at the lower portion of the first rear case, a waist portion is formed between the upper portion and the lower portion of the first rear case, and the lower portion of the first rear case can be turned from the waist portion with respect to the upper portion of the first rear case so that the first rear case can be turned by a preset angle with respect to the second rear case.

In some embodiments of the present application, the second rear cases are provided in two, and the two second rear cases are provided on the left and right sides of the first rear case, respectively.

In some embodiments of the present application, the plurality of the card holes are arranged at intervals, and the plurality of the card protrusions are arranged corresponding to the card holes.

According to the technical scheme, the utility model has at least the following advantages and positive effects:

In the utility model, the second rear shell cover is combined and fixed on the back of the back plate, one end of the second rear shell facing the first rear shell is formed at a convex lap joint part, and a clamping hole is formed on the lap joint part. The first back shell is provided with a convex clamping protrusion on one surface facing the back plate, and the clamping protrusion is arranged at one side edge of the first back shell facing the second back shell. The first backshell can be close to and keep away from the backplate and remove, and make the edge of first backshell towards the second backshell overlap joint forward in the one side of overlap joint portion back to make the convex separable block of card in the card hole, thereby make the separable block of first backshell on the second backshell, thereby make things convenient for connection and dismantlement between first backshell and the second backshell.

Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic diagram of a display device according to the present utility model.

Fig. 2 is a schematic exploded view of the rear cover of the present utility model.

Fig. 3 is a schematic view of the structure of the back cover of the present utility model.

Fig. 4 is a schematic view of the mechanism of the second rear case of the present utility model from one view.

Fig. 5 is a schematic view of the mechanism of the second rear case of the present utility model from another view angle.

Fig. 6 is an enlarged view at a in fig. 5.

Fig. 7 is an enlarged view at B in fig. 3.

Fig. 8 is a schematic view of the first rear case of the present utility model from one view angle.

Fig. 9 is a schematic view of another view of the first rear case of the present utility model.

Fig. 10 is an enlarged view at C in fig. 9.

FIG. 11 is a schematic view of the structure of the tongue of the present utility model.

The reference numerals are 100, a back plate, 200, a back cover, 210, a first back shell, 211, a plug tongue, 212, a guide part, 2121, a first guide surface, 2122, a second guide surface, 213, a clamping column, 214, ribs, 215, an upper part, 216, a lower part, 217, a waist part, 220, a second back shell, 221, a lap joint part, 222, a first clamping hole, 223, a second clamping hole, 224 and a flange.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

The application will be described in further detail with reference to the drawings and the specific examples. It should be noted that the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

At present, the television mainly uses a rear shell to protect electronic components in the whole machine, and the sizes of all rear shells are larger. In order to reduce the mold cost and the package and transportation cost of the rear shell, the rear shell is designed into a split structure. The split type backshell is connected through the screw mainly, and this kind of connected mode is comparatively loaded down with trivial details not only during the installation, also takes time when dismantling. When the self-tapping screw is used for connection, the problems of sliding wire and the like are easy to cause, and the exposed screw also very influences the appearance of the television. The application provides a display device to solve the technical problems.

For convenience of description, unless otherwise specified, the directions of up, down, left, right, front and rear are all referred to herein with reference to the state of the display device when in use. The screen of the display device (i.e. the display surface of the display panel) is the front, and the opposite direction is the back. The display device is not limited to electronic products such as televisions, computer monitors, digital photo frames and the like. The following specifically describes a structure of a liquid crystal television.

Fig. 1 is a schematic diagram of a display device according to the present utility model.

Referring to fig. 1, the display device includes a back plate 100, a display panel (not shown) disposed at a front side of the back plate 100, and a rear cover 200 covering a rear surface of the back plate 100. The back plate 100 is a main support of the display device, and a mounting cavity is formed on the front side of the back plate 100 for mounting structures such as a light source and an optical film set, and light emitted by the light source passes through the optical film set to display corresponding image information on the display panel. The back plate 100 and the display panel constitute a display main body. The specific structure of the back plate 100 refers to the structure of the back plate 100 in the related art, and will not be described herein.

The peripheral edge of the back plate 100 is formed with a forwardly projecting rim which is circumferentially disposed and extends around the edge of the back plate 100. The bezel extends forward beyond the front side of the back plate 100, and the bezel and the back plate 100 enclose a mounting cavity with a front opening for mounting the backlight source and the optical film set. The display panel is fixed at the front end of the frame.

The frame may be a middle frame that secures the peripheral edges of the back plate 100. The middle frame wraps around the edges of the back plate 100, and the middle frame surrounds the peripheral edges of the back plate 100. In some embodiments, the bezel and the back plate 100 are integrally formed, with the edge of the back plate 100 extending forward to form the bezel, which is circumferentially disposed.

The display panel is disposed on the front side of the back panel 100 for displaying image information for viewing by a user. The edge of the display panel is connected to the frame, thereby fixing the display panel. A space is formed between the front side of the back plate 100 and the rear side of the display panel to form a mounting cavity, and an optical film group and a light source are disposed in the space, and the light emitted from the light source passes through the optical film group and then displays image information on the display panel.

The rear cover 200 is disposed at the rear side of the back plate 100, and a chamber is formed between the front side of the rear cover 200 and the rear side of the back plate 100. The rear side of the back plate 100 is provided with a drive member, which is provided in the chamber. The driving part comprises a driving board, a power board, a loudspeaker, a power strip and other main boards. The driving part is fixed on the back surface of the back plate 100 and is located within the coverage area of the back cover 200 to protect the electronic parts by the back cover 200. The driving board is mainly used for carrying out operation on the control system and correspondingly outputting related operation instructions. The driving plate is located between the rear surface of the back plate 100 and the rear cover 200, and is fixed on the rear surface of the back plate 100.

The speaker is disposed on the back of the back plate 100, and is mainly used for emitting corresponding sound in cooperation with the interface displayed by the display panel. The power strip is provided with a plurality of interfaces of different types for connecting with external equipment. To receive signals from or output signals to external devices. In some embodiments, the strip is integrated on the drive board.

The rear cover 200 is mounted on the rear surface of the back plate 100 to cover and shield the driving parts to protect the driving parts on the rear surface of the back plate 100. The rear cover 200 is detachably covered on the back surface of the back plate 100, so that after the rear cover 200 is detached, the electronic components on the back surface of the back plate 100 can be maintained and detected.

Fig. 2 is a schematic exploded view of the rear cover of the present utility model. Fig. 3 is a schematic view of the structure of the back cover of the present utility model.

Referring to fig. 2 and 3, the rear cover 200 is used to cover the rear surface of the back plate 100, and the rear cover 200 covers the driving components on the rear surface of the back plate 100. In this embodiment, the rear cover 200 covers a partial area of the back plate 100, and forms an exterior surface of the back surface of the display device together with the back surface of the back plate 100.

The rear cover 200 includes a first rear case 210 and a second rear case 220 disposed adjacently, and opposite edges of the first rear case 210 and the second rear case 220 are spliced. The rear cover 200 is of a split structure, and the single first and second rear cases 210 and 220 have a smaller area with respect to the whole rear cover 200, facilitating production and manufacturing as well as installation.

In the present embodiment, the first rear case 210 and the second rear case 220 are adjacently disposed in the left-right direction, the second rear case 220 is disposed in two, and the first rear case 210 is disposed in one. The two second rear cases 220 are respectively disposed at left and right sides of the first rear case 210, and one side of the two second rear cases 220 opposite to the first rear case 210 is respectively overlapped on the first rear case 210. In one embodiment, the first and second rear cases 210 and 220 are provided as one, respectively.

In some embodiments, the first and second rear cases 210 and 220 are disposed adjacently in the up-down direction, and the first and second rear cases 210 and 220 are disposed in plurality, respectively.

Fig. 4 is a schematic view of the mechanism of the second rear case of the present utility model from one view. Fig. 5 is a schematic view of the mechanism of the second rear case of the present utility model from another view angle. Fig. 6 is an enlarged view at a in fig. 5.

Referring to fig. 1 to 6, the second rear case 220 covers and is fixed to the rear surface of the back plate 100. The second rear case 220 is fixed to the rear surface of the back plate 100 by means of a snap fit or a fastener. The second rear case 220 is formed at one end facing the first rear case 210 at a protruding overlap portion 221, and the overlap portion 221 is used to overlap the first rear case 210, so that the first rear case 210 and the second rear case 220 are spliced together. The rear side of the overlap portion 221 is in front of the rear surface of the first rear case 210, and after the first rear case 210 and the second rear case 220 are spliced, one surface of the first rear case 210 facing the edge of the second rear case 220 and facing the back plate 100 overlaps the overlap portion 221, and the rear surfaces of the first rear case 210 and the second rear case 220 smoothly transition.

The overlapping portion 221 is provided with a clamping hole for being clamped with a corresponding structure on the first rear case 210, so that the first rear case 210 and the second rear case 220 are connected. The card hole sets up to one or more, and when the card hole set up to a plurality of, a plurality of card holes interval sets up.

In this embodiment, two clamping holes are provided, namely a first clamping hole 222 and a second clamping hole 223. The first clamping hole 222 is positioned in the long hole, and the length direction of the first clamping hole 222 is vertically arranged. The second clamping hole 223 is a round hole, and the second clamping hole 223 is located below the first clamping hole 222. In some embodiments, both of the snap holes are elongated holes.

The flange 224 extends back to the first rear shell 210 to enhance the structural strength of the second rear shell 220 at the clamping hole, effectively avoid the breakage or damage at the clamping hole, and ensure the reliability of the clamping of the first rear shell 210 at the clamping hole.

Fig. 7 is an enlarged view at B in fig. 3. Fig. 8 is a schematic view of the first rear case of the present utility model from one view angle. Fig. 9 is a schematic view of another view of the first rear case of the present utility model. Fig. 10 is an enlarged view at C in fig. 9. FIG. 11 is a schematic view of the structure of the tongue of the present utility model.

Referring to fig. 1 to 11, the edge of the first rear case 210 is overlapped on the overlapped portion 221 of the second rear case 220. The first rear case 210 is formed with a convex locking protrusion on a side facing the back plate 100, and the locking protrusion is disposed at an edge of the first rear case 210 facing the second rear case 220. The first rear housing 210 can move close to and away from the back plate 100, so that the edge of the first rear housing 210 facing the second rear housing 220 is lapped forward on the surface of the lapping part 221 facing away from the back plate 100, and the clamping protrusion is detachably clamped in the clamping hole, so that the first rear housing 210 and the second rear housing 220 are detachably connected, and the first rear housing 210 and the second rear housing 220 are convenient to detach. At the same time, the use of screws is reduced, and the aesthetic property of the back surface of the rear cover 200 is ensured.

The card protruding is provided with one or more, and when the card hole set up to a plurality of, the card protruding sets up to a plurality of to correspond in the card hole. The number and the positions of the clamping protrusions correspond to those of the clamping holes. In this embodiment, two card holes are provided, and two card protrusions are provided correspondingly.

One of the locking tabs is an insertion tongue 211 protruding from the first rear case 210, a protruding guiding portion 212 is formed on one side of the free section of the insertion tongue 211, the guiding portion 212 overlaps the overlapping portion 221 toward one side of the first rear case 210, and the insertion tongue 211 is limited in the corresponding locking hole. Specifically, the insertion tongue 211 is disposed corresponding to the first card hole 222, and the insertion tongue 211 is inserted into the first card hole 222.

The guide 212 is formed with a first guide surface 2121 on a side facing away from the first rear case 210, and the first guide surface 2121 is inclined toward the first rear case 210 in a direction away from the tongue 211. When the first rear case 210 moves toward the second rear case 220, the first insert tongue 211 extends into and is engaged with the corresponding first engaging hole 222. When the inserting tongue 211 extends into the corresponding first clamping hole 222, the first guiding surface 2121 on the guiding portion 212 is arranged, so that the inserting tongue 211 can extend into the clamping hole conveniently, and after the inserting tongue 211 extends into the clamping hole, the guiding portion 212 is lapped on the lapping portion 221, so that the inserting tongue 211 is limited in the first clamping hole 222.

The guide 212 is formed with a second guide surface 2122 on a surface facing the first rear case 210, the second guide surface 2122 extending away from the first rear case 210 in a direction away from the tongue 211. When the first rear housing 210 moves far away from the back plate 100, and the first rear housing 210 moves far away from the second rear housing 220, the insert tongue 211 is separated from the corresponding first clamping hole 222, and the second guide surface 2122 facilitates the insert tongue 211 to be drawn out from the first long hole, so that the first rear housing 210 and the second rear housing 220 are separated conveniently.

The first rear shell 210 can at least partially turn over relative to the back plate 100 to drive the insert tongue 211 to move, and the insert tongue 211 has a space between two opposite side walls in the turning plane of the first rear shell 210 and the side walls of the corresponding clamping holes, so that when the first rear shell 210 turns over relative to the back plate 100, the insert tongue 211 can extend into or withdraw from the corresponding first clamping hole 222, and the movement of the insert tongue 211 in the first long hole is not interfered by the first long hole.

One of the locking projections is a locking post 213 protruding from the first rear case 210, and the locking post 213 is locked in the corresponding second locking hole 223. In this embodiment, two protruding portions are disposed at the edge of the first rear housing 210 facing the second rear housing 220, and the two protruding portions are respectively an insertion tongue 211 and a clip column 213. In some embodiments, the plurality of snap tabs are each a tab 211.

In this embodiment, protruding ribs 214 are formed on the peripheral side of the clamping post 213, and the ribs 214 are attached to the peripheral side wall of the corresponding clamping hole. The rib 214 is circumferentially provided on the outer circumferential side of the clip column 213 around the axis of the clip column 213, and the rib 214 is fitted on the circumferential side wall corresponding to the second clip hole 223. The engagement of the clamping posts 213 in the second clamping holes 223 enhances the structural strength and stability of the clamping of the first rear case 210 and the second rear case 220. The locking posts 213 are engaged in the second locking holes 223 to restrict the movement of the second rear case 220 in the up-down and left-right directions with respect to the first rear case 210.

The rib 214 is formed with a guiding surface at an end facing away from the first rear case 210, and the guiding surface is inclined in a direction facing the first rear case 210 in a direction facing away from the clamping post 213, so as to facilitate the clamping post 213 to extend into the corresponding second clamping hole 223.

In the present embodiment, the second rear case 220 is disposed at left and right sides of the first rear case 210, the first rear case 210 includes an upper portion 215 and a lower portion 216, a snap-protrusion is formed at the lower portion 216 of the first rear case 210, a waist portion 217 is formed between the upper portion 215 and the lower portion 216 of the first rear case 210, and the lower portion 216 of the first rear case 210 can be flipped from the waist portion 217 with respect to the upper portion 215 of the first rear case 210 so that the first rear case 210 can be flipped by a predetermined angle with respect to the second rear case 220. The first rear case 210 is turned over with respect to the second rear case 220 to facilitate separation of the first rear case 210 and the second rear case 220.

In some embodiments, the first rear case 210 can be integrally flipped with respect to the second rear case 220 to facilitate the engagement and disengagement of the first rear case 210 and the second rear case 220.

In other embodiments, the first rear housing 210 is translatable integrally with respect to the second rear housing 220 in a direction away from the back plate 100 to enable the first rear housing 210 and the second rear housing 220 to engage and disengage.

In the present utility model, the second back case 220 is covered and fixed on the back surface of the back plate 100, one end of the second back case 220 facing the first back case 210 is formed on a protruding lap joint part 221, and a clamping hole is formed on the lap joint part 221. The first rear case 210 is formed with a convex locking protrusion on a side facing the back plate 100, and the locking protrusion is disposed at an edge of the first rear case 210 facing the second rear case 220. The first rear case 210 can move close to and away from the back plate 100, so that the edge of the first rear case 210 facing the second rear case 220 is lapped forward on the surface of the lapping part 221 facing away from the back plate 100, and the clamping protrusion is detachably clamped in the clamping hole, so that the first rear case 210 is detachably clamped on the second rear case 220, and connection and disassembly between the first rear case 210 and the second rear case 220 are convenient.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. In the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made in the above embodiments by those skilled in the art within the scope of the application, which is therefore intended to be covered by the appended claims and their equivalents.

Claims (10)

1. A display device, comprising: A back plate, the front side of which is provided with a display panel for displaying image information; a driving component is fixed on the back side of the back plate; A rear cover is used to cover the back of the back plate and cover the driving component; the rear cover includes a first rear shell and a second rear shell arranged adjacent to each other; the second rear shell is combined and fixed to the back of the back plate, and the end of the second rear shell facing the first rear shell is formed on a protruding overlap portion; a clamping hole is provided on the overlap portion; a protruding clamping protrusion is formed on a side of the first rear shell facing the back plate; the clamping protrusion is provided on a side edge of the first rear shell facing the second rear shell; The first rear shell can move toward and away from the back plate, so that the edge of the first rear shell facing the second rear shell overlaps forwardly on a side of the overlap portion facing away from the back plate, and the latching protrusion is detachably engaged in the latching hole. 2. The display device according to claim 1, characterized in that the locking protrusion is an insertion tongue protruding from the first rear shell, a side surface of the free section of the insertion tongue is formed with a protruding guide portion, and the guide portion overlaps the overlapping portion on a side facing the first rear shell; a first guide surface is formed on a side of the guide portion facing away from the first rear shell, and the first guide surface is inclined toward the first rear shell in a direction away from the insertion tongue. 3 . The display device according to claim 2 , wherein a second guide surface is formed on a surface of the guide portion facing the first rear shell, and the second guide surface extends away from the insertion tongue and away from the first rear shell. 4. The display device according to claim 2, characterized in that the first rear shell is at least partially capable of flipping relative to the back plate to drive the insertion tongue to move; and there is a gap between two opposite side walls of the insertion tongue in the flipping plane of the first rear shell and the corresponding side walls of the locking hole. 5 . The display device according to claim 1 , wherein the latching protrusion is a latching column protruding from the first rear housing, and a protruding rib is formed on a peripheral side of the latching column; the rib is attached to a peripheral side wall corresponding to the latching hole. 6 . The display device according to claim 5 , wherein a guide surface is formed at one end of the rib facing away from the first rear shell, and the guide surface is inclined in a direction facing away from the card column and toward the first rear shell. 7 . The display device according to claim 1 , wherein a protruding flange is formed on an edge of the latch hole; and the flange extends away from the first rear shell. 8. The display device according to claim 1 is characterized in that the second rear shell is arranged on the left and right sides of the first rear shell; the first rear shell includes an upper part and a lower part; the latching protrusion is formed at the lower part of the first rear shell; a waist is formed between the upper part and the lower part of the first rear shell, and the lower part of the first rear shell can be flipped from the waist relative to the upper part of the first rear shell, so that the first rear shell can be flipped at a preset angle relative to the second rear shell. 9 . The display device according to claim 8 , wherein the number of the second rear shells is two, and the two second rear shells are respectively arranged on the left and right sides of the first rear shell. 10. The display device according to any one of claims 1 to 9, characterized in that the locking holes are arranged in a plurality at intervals, and the locking protrusions are arranged in a plurality and correspond to the locking holes.