WO2021063080A1 - Display main body and assembled intelligent interactive panel - Google Patents

Abstract

A display main body (10) and an assembled intelligent interactive panel. The display main body (10) comprises a display module and a frame component (5). The display module comprises a back plate (1), and a diffusion plate (2), an optical film (3), and a cover plate (4) which are sequentially provided at one side of the back plate (1). The frame component (5) is provided on the periphery of the display module. The back plate (1) and the diffusion plate (2) are provided at intervals. A light source component (6) is provided at the side of the back plate (1) close to the diffusion plate (2), and abuts against the diffusion plate (2). At least one assembling side and non-assembling side are provided on the periphery of the display module. The frame component (5) comprises a first frame strip (501) provided at the assembling side and second frame strips (502) provided at the non-assembling side. The edge of the optical film (3) close to the assembling side is sandwiched between the first frame strip (501) and the cover plate (4). A hanging hole (302) is provided on the edge of the optical film (3) close to the non-assembling side. The second frame strip (502) is provided with a hanging column (504) inserted into the hanging hole (302). A non-display region of the display main body (10) is narrow, the display effect is good, and the overall thickness is thin.

Description

Display main body and splicing intelligent interactive tablet

This application claims the priority of the patent application filed to the State Intellectual Property Office of China on September 30, 2019, with the application number of 201910944031.5, and the title of the invention as "display body and splicing intelligent interactive tablet".

Technical field

This application relates to the technical field of display devices, and in particular to a display main body and a spliced intelligent interactive tablet.

Background technique

In the field of high-end display engineering, large-screen image display has been widely used. The super-large picture and clear and realistic display effect it brings have greatly improved the quality of work in the fields of surveillance, security, conferences, and simulation. Due to the size limitation of a single screen, in order to realize a super-large screen display, multiple screens need to be spliced together to form a large spliced screen.

At present, a single screen is mostly suspended around the optical film on the backplane, and a frame assembly composed of a compression frame and an outer frame is used. The compression frame is connected to the outer frame. The compression frame is used to press the optical diaphragm on the backplane. Therefore, the pressing frame part will be located in the display area of the glass cover, which will affect the display effect, and the frame assembly of the pressing frame and the outer frame will increase the structure complexity, which is not convenient for disassembly and assembly. After the two screens are spliced, the splicing place is The outer frame and the pressing frame will increase the width of the non-display area and affect the display effect.

In addition, the screen often uses a direct-lit backlight module as its backlight structure. In order to achieve a good backlight effect and structural stability, the conventional direct-lit backlight module generally requires multiple support columns to support the diffuser plate. Among them, the common support pillars are made of PC and PMMA, which are generally transparent or white, and have different shapes. However, no matter what kind of support pillar, there is a disadvantage. The support pillar is prone to shadows, especially when it is a direct-lit backlight module. The smaller the size, the more obvious the shadow of the support column. At this time, more optical films are needed for shielding, which will increase the cost of the backlight module. In addition, the conventional direct-lit display has a relatively large overall thickness of the screen due to the long distance between the diffuser plate and the back plate.

Summary of the invention

One purpose of the embodiments of the present application is to provide a display main body and a spliced intelligent interactive tablet, which have a simple structure, a narrow non-display area, and a good display effect.

Another purpose of the embodiments of the present application is to provide a display main body and a splicing smart interactive tablet, which does not need to be provided with a supporting column to support the diffuser plate, the backlight effect and the display effect are good, and the distance between the diffuser plate and the back plate Smaller, the overall thickness is thinner.

To achieve this goal, the following technical solutions are adopted in the embodiments of this application:

In a first aspect, a display body is provided, including a display module and a frame assembly, the display module includes a back plate, a diffuser plate, an optical film, and a cover plate that are sequentially arranged on one side of the back plate. The frame assembly is arranged on the periphery of the display module, the back plate and the diffuser plate are arranged at intervals, a light source assembly is arranged on the side of the back plate close to the diffuser plate, and the light source assembly abuts against the diffuser board;

The periphery of the display module is provided with at least one splicing side and a non-splicing side, the frame assembly includes a first frame strip arranged on the splicing side and a second frame strip arranged on the non-splicing side, so The edge of the optical film adjacent to the splicing side is sandwiched between the first frame bar and the cover plate, the edge of the optical film adjacent to the non-splicing side is provided with a hanging hole, and The second frame bar is provided with a suspension column inserted into the suspension hole.

As a preferred solution of the display body, the first frame bar includes a first body and a first boss protrudingly arranged on a side of the first body close to the center of the display module, and the optical film The sheet and the diffuser plate are both arranged between the first boss and the cover plate.

As a preferred solution of the display main body, the second frame bar includes a second body, and a second boss protruding from a side of the second body close to the center of the display module, the second boss One side of the cover plate is bonded to one side of the cover plate close to the optical film, and the other side is provided with the suspension column.

As a preferred solution of the display main body, a pressing piece is connected to the side of the second boss close to the back plate, and the pressing piece includes a connecting mounting plate and a first pressing plate, and the mounting plate passes through The screw is connected with the second boss, and the first pressing plate is pressed against the side of the diffuser plate away from the optical film.

As a preferred solution of the display main body, the second body has a first limiting portion extending beyond a side surface of the second boss close to the back plate, and extending out of the second boss close to the cover. A second limiting portion on one side of the board, the first limiting portion shields the edge of the back plate adjacent to the second frame bar, and the second limiting portion protrudes from the second boss The height of is not greater than the thickness of the cover plate.

As a preferred solution of the display main body, the light source assembly includes a PCB board arranged on the back plate and an LED lamp bead arranged on the side of the PCB board facing away from the back plate. At least one lamp bead convex portion is protrudingly provided on the surface, and the lamp bead convex portion abuts against the diffuser plate.

As a preferred solution of the display main body, the back plate is a flat plate structure, and the first frame bar and the second frame bar are both connected with the back plate.

As a preferred solution of the display main body, a plurality of connecting frames are arranged at intervals along the length direction of the first frame bar, and the connecting frames include a first board and a second board connected vertically, and the first board and the The first frame bar is connected, and the second board is connected with the back board.

As a preferred solution of the display main body, the first plate is arranged on the side of the first frame strip away from the optical film, and the second plate is arranged on the back plate away from the optical film. On the other hand, the first plate is connected with the first frame bar by screws, and the second plate is connected with the back plate by screws.

As a preferred solution of the display body, the first frame bar includes a plate-shaped first body, and a first boss is protrudingly provided on a side of the first body close to the optical film, and the diffuser The plate and the optical film are arranged between the first boss and the cover plate, one side of the first boss is protrudingly provided with a reinforcing column, and the first body is provided with A threaded hole screwed by a screw, and the threaded hole penetrates the reinforcing column.

In a second aspect, a spliced smart interactive tablet is provided, including a main screen, a sub-screen is spliced on at least one side of the main screen, and both the main screen and the sub-screen include the display main body.

As a preferred solution of a spliced smart interactive flat panel, it also includes at least one first adjusting plate and at least one second adjusting plate, a splicing seam is formed between the main screen and the secondary screen, the first adjusting plate and The second adjusting plates are all adjacent to the splicing seam. One end of the first adjusting plate is connected to the back side of the main screen by screws, and the other end is pressed against the back side of the secondary screen. One end of the two adjusting plates is connected to the back side of the secondary screen by the screw, and the other end is pressed against the back side of the main screen.

As a preferred solution of a spliced smart interactive tablet, a first guide post is protrudingly provided on one of the first adjusting plate and the back plate of the main screen, and the first adjusting plate and the main screen The other of the two backplanes is provided with a first guide hole that is inserted and matched with the first guide post; and/or,

A second guide post is protrudingly provided on one of the second adjusting plate and the back plate of the secondary screen, and the other of the second adjusting plate and the back plate of the secondary screen is protruding. A second guide hole that is inserted and matched with the second guide post is provided.

As a preferred solution of a spliced intelligent interactive flat panel, the number of the first adjusting plate and/or the second adjusting plate is greater than two, and the first adjusting plate and the second adjusting plate are alternately arranged in In the length direction of the splicing seam.

As a preferred solution of a spliced smart interactive tablet, the frame component of the main screen includes two second frame bars arranged at intervals along the vertical direction, which are respectively an upper frame bar on the main screen and a lower frame bar on the main screen. The frame component includes two second frame bars arranged at intervals along the vertical direction, which are respectively the upper frame bar of the secondary screen and the lower frame bar of the secondary screen;

The splicing smart interactive flat panel also includes a first splicing piece, which is respectively connected to the lower frame bar of the main screen and the lower frame bar of the sub-screen by screws, and the first splicing piece is provided with protruding Two convex pillars, the two convex pillars are respectively inclined toward the main screen and the auxiliary screen away from the splicing seam, the main screen lower frame bar and the auxiliary screen lower frame bar are respectively provided with an axis and a The splicing seam is a jack provided at an included angle, and the protruding column is inserted into the jack.

As a preferred solution of the splicing intelligent interactive flat panel, the two convex pillars are symmetrically arranged along the splicing seam.

As a preferred solution of the spliced smart interactive flat panel, the convex column is tapered, and the size of the end of the convex column connected to the first assembling piece is larger than the end of the convex column away from the first assembling piece size of.

As a preferred solution for splicing smart interactive flat panels, the first assembling piece is provided with a first fixing hole for the screw to pass through, the first fixing hole is a waist-shaped hole, and the first fixing hole is The long side extends along the length direction of the lower frame bar of the main screen, and both the lower frame bar of the main screen and the lower frame bar of the secondary screen are provided with first threaded holes corresponding to the first fixing holes.

As a preferred solution of a spliced intelligent interactive flat panel, the first splicing piece includes a first splicing plate and a second splicing plate arranged at an included angle, the convex column is arranged on the first splicing plate, and the The second splicing board has a logo side on the same side as the display side of the main screen, and the logo side is provided with a LOGO logo.

As a preferred solution of the spliced intelligent interactive flat panel, it further includes a second assembling piece, which is respectively connected to the upper frame bar of the main screen and the upper frame bar of the secondary screen by screws.

As a preferred solution of a spliced smart interactive tablet, the upper frame bar of the main screen is recessed with a main screen groove, the upper frame bar of the auxiliary screen is recessed with a sub-screen groove, the main screen groove and the The auxiliary screen grooves communicate and jointly form a receiving groove for accommodating the second assembling piece, and one side of the second assembling piece away from the bottom of the receiving groove does not protrude from the notch of the receiving groove. The bottom of the groove is provided with a second threaded hole, the second assembling piece is provided with a second fixing hole, and the screw passes through the second fixing hole and is screwed into the second threaded hole to fix the The second assembling piece is fixed in the containing groove.

The beneficial effects of the embodiments of the present application are: by abutting the light source assembly against the diffuser plate, the light source assembly can be used as the supporting structure of the diffuser plate to support the diffuser plate, eliminating the need for supporting pillars, and improving the backlight and display effects, and the diffuser plate The distance from the back plate is only the thickness of the light source assembly, which greatly reduces the overall thickness of the display body; the optical film is fixed by clamping and hanging the display body, and the clamping side is located at the splicing of the display body It can avoid setting the hanging column on the splicing side, reducing the width of the non-display area of the splicing side after splicing, and improving the display effect; by setting the hanging column for hanging the optical film on the second frame strip, the optical film can be avoided Hanging on the backplane eliminates the need to press the frame on the optical film, and after the frame is omitted, a wider display area can be formed, that is, the non-display area at the second frame bar is reduced.

Description of the drawings

The application will be further described in detail below based on the drawings and embodiments.

Fig. 1 is a schematic structural diagram of a spliced smart interactive tablet according to an embodiment of the application.

FIG. 2 is a schematic front view of a display main body according to an embodiment of the application.

Fig. 3 is a schematic cross-sectional view of A-A in Fig. 2.

Fig. 4 is an enlarged schematic diagram of B in Fig. 3.

Fig. 5 is an enlarged schematic diagram of C in Fig. 3.

FIG. 6 is a schematic diagram of the assembly of the optical film, the frame assembly, and the pressing member according to an embodiment of the application.

Fig. 7 is an enlarged schematic diagram of D in Fig. 6.

Fig. 8 is an enlarged schematic diagram of E in Fig. 6.

Fig. 9 is an enlarged schematic view of F in Fig. 6.

Fig. 10 is an exploded schematic diagram of Fig. 6.

FIG. 11 is a schematic diagram of the structure of a pressing member according to an embodiment of the application.

Fig. 12 is an enlarged schematic diagram of G in Fig. 10.

FIG. 13 is a schematic cross-sectional view of the display body at the splicing side according to an embodiment of the application.

FIG. 14 is a three-dimensional schematic diagram from another perspective of the spliced smart interactive tablet according to an embodiment of the application.

FIG. 15 is a partial enlarged schematic diagram of H in FIG. 14.

FIG. 16 is a schematic diagram of the structure of a first adjusting plate according to an embodiment of the application.

FIG. 17 is a schematic diagram of the structure of a second adjusting plate according to an embodiment of the application.

18 is a partial schematic diagram of the splicing smart interactive tablet in the embodiment of the application where the lower frame of the main screen and the lower frame of the secondary screen are spliced (the first splicing piece is not shown).

FIG. 19 is a first perspective three-dimensional schematic diagram of the first assembling piece according to the embodiment of the application.

FIG. 20 is a first perspective three-dimensional schematic diagram of a first assembling piece according to an embodiment of the application.

In the picture:

10. Display the main body;

1. Back plate; 2. Diffusion plate; 3. Optical diaphragm; 301, hanging ear; 302, hanging hole; 4. Cover plate; 5. Frame assembly; 501, first frame bar; 5011, first body; 5012 , First boss; 5013, reinforcement column; 502, second frame bar; 5021, second body; 50211, first limit part; 50212, second limit part; 5022, second boss; 50221, first 1 groove; 50222, second groove; 50223, positioning hole; 5023, main screen upper frame bar; 5024, main screen lower frame bar; 5025, secondary screen upper frame bar; 5026, secondary screen lower frame bar; 5027, jack 5028, the first threaded hole; 503, the pressing piece; 5031, the mounting plate; 5032, the first pressing plate; 5033, the positioning column; 5034, the connecting piece; 5035, the second pressing plate; 504, the hanging column; 6, the light source assembly 7. Connecting frame; 701, the first board; 702, the second board;

20. The first adjustment plate; 2001. The first guide column;

30. The second adjusting plate; 3001, the second guide column;

40. The first assembling piece; 4001, the convex column; 4002, the first fixing hole; 4003, the first splicing plate; 4004, the second splicing plate;

50. The second assembling piece;

60. Camera components;

100, main screen; 200, secondary screen; 300, splicing seam.

Detailed ways

In order to make the technical problems solved by the present application, the technical solutions adopted, and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be described in further detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the present application. Some embodiments, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of this application.

In the description of this application, unless expressly stipulated and limited otherwise, the terms "connected", "connected", and "fixed" shall be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated. ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

In this application, unless expressly stipulated and defined otherwise, the "above" or "below" of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or only that the level of the first feature is higher than the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

As shown in Figures 1 to 7, Figure 10, Figure 11, and Figure 13 (refer to Figures 1 to 20 for reference numerals of all embodiments of the specification), an embodiment of the present application provides a display body 10 that is applied to a splicing smart An interactive flat panel, the display body 10 includes a display module and a frame assembly 5. The display module includes a back plate 1 and a diffuser plate 2, an optical film 3 and a cover plate 4 arranged on one side of the back plate 1, and the frame assembly 5 is arranged At the periphery of the display module, the back plate 1 and the diffuser plate 2 are spaced apart, a light source assembly 6 is arranged on the back plate 1 near the diffuser plate 2, and the light source assembly 6 abuts against the The diffuser plate 2, the periphery of the display module is provided with at least one splicing side and a non-splicing side, and the frame assembly 5 includes a first frame strip 501 arranged on the splicing side and a first frame strip 501 arranged on the non-splicing side. The second frame bar 502, the edge of the optical film 3 adjacent to the splicing side is sandwiched between the first frame bar 501 and the cover plate 4, and the optical film 3 is adjacent to the non- The edge of the splicing side is provided with a hanging hole 302, and the second frame strip 502 is provided with a hanging column 504 inserted into the hanging hole 302. By abutting the light source assembly 6 against the diffuser plate 2, the light source assembly 6 can be used as the supporting structure of the diffuser plate 2 to support the diffuser plate 2, eliminating the need for supporting pillars, improving the backlight and display effects, and the diffuser plate 2 and the back plate The distance between 1 is only the thickness of the light source assembly 6, which greatly reduces the overall thickness of the display body 10; the optical film 3 is fixed by clamping and hanging the display body 10, and the clamping side is located on the display body On the splicing side of 10, it is possible to avoid setting the hanging column 504 on the splicing side, reduce the width of the non-display area of the spliced side after splicing, and improve the display effect; by setting the hanging column 504 of the hanging optical film 3 on the second frame bar 502 , Can avoid hanging the optical film 3 on the back plate 1, eliminates the need to press the frame on the optical film 3, and after the frame is omitted, a wider display area can be formed, that is, the second frame can be reduced. The non-display area at bar 502.

The existing direct type backlight module hangs the optical film on the back plate, and the press frame presses the optical film on the back plate. Therefore, the press frame must be partially set on the side of the optical film close to the cover plate. The cover plate is made of transparent tempered glass. The press frame is easily exposed through the cover plate. In order to reduce the chance of the press frame being exposed, it is necessary to set more diaphragms to cover it, which increases the manufacturing cost. The display area of the display subject is reduced, that is, the non-display area at the edge of the display subject is increased, and the display effect is greatly reduced. The optical film 3 of the present solution is suspended on the second frame strip 502, so that the area between the optical film 3 and the cover plate 4 does not have a structure such as a press frame, and the optical film 3 and the diffuser plate 2 are passed through layer by layer. The shielding can completely hide the structure located on the diffuser plate 2 away from the optical film 3, and there is no need to add an additional film for shielding, which improves the display effect.

Tempered glass belongs to safety glass. Tempered glass is actually a kind of prestressed glass. In order to improve the strength of glass, chemical or physical methods are usually used to form compressive stress on the glass surface. When the glass is subjected to external force, the surface stress is first offset, thereby improving the bearing capacity and enhancing the resistance of the glass itself. Wind pressure, cold and heat, shock, etc.

As shown in Figures 6 and 10, the frame assembly 5 can be a rectangular frame surrounded by a first frame strip 501 and three second frame strips 502, or two first frame strips 501 and two second frame strips. In the rectangular frame structure surrounded by bars 502, the number of first frame bars 501 is determined according to the number of splicing display main bodies 10. For example, when two display main bodies 10 are spliced, the frame components 5 of the two display main bodies 10 can be It is set as a rectangular frame structure surrounded by a first frame bar 501 and three second frame bars 502; when the three display bodies 10 are spliced together, the display body 10 located in the middle adopts two first frame bars 501 and two second frame bars. A rectangular frame structure surrounded by two frame bars 502, and the display body 10 on both sides adopts a rectangular frame structure surrounded by a first frame bar 501 and three second frame bars 502.

Specifically, the three second frame bars 502 are respectively located above the display main body 10, below the display main body 10, and on the side of the display main body 10 away from the splicing side. The three second frame bars 502 are connected to form a U-shaped structure. The opening of the U-shaped structure faces the splicing side, and the upper and lower ends of the first frame strip 501 abut or connect with the ends of the two second frame strips 502.

Two ends of the second frame strip 502 opposite to the splicing side are vertically bent toward the splicing side with connecting parts, and the connecting parts are respectively connected to the two second frame strips 502 located above and below the display body 10 by screws. This structure can avoid the installation of additional corner pieces, reduce the number of parts, and reduce the difficulty of assembly.

As shown in Figure 4, Figure and Figure 7, the second frame bar 502 includes a second body 5021, a side of the second body 5021 close to the center of the display module protruding with a second boss 5022, the second boss 5022 One side is bonded to the side of the cover plate 4 close to the optical film 3, and the other side is provided with a suspension post 504. The second boss 5022 can provide a fixed plane for the cover plate 4, and can also facilitate the installation of the suspension column 504 at the same time.

Specifically, the side of the second boss 5022 away from the cover plate 4 is recessed with a first groove 50221, and the first groove 50221 has a first notch facing the back plate 1 and a second groove facing the center of the display module.口, the suspension post 504 is protrudingly arranged in the first groove 50221, the suspension post 504 is perpendicular to the back plate 1, the edge of the optical film 3 corresponding to the first groove 50221 is protrudingly provided with a hanging ear 301, and the hanging ear 301 is provided There is a hanging hole 302, and the hanging ear 301 is arranged in the first groove 50221. By providing the first groove 50221, the hanging ear 301 of the optical film 3 can be prevented from protruding from the second boss 5022, and the hanging ear 301 can be protected.

As shown in Figures 6 to 12, the side of the second boss 5022 close to the back plate 1 is connected with a pressing piece 503. The pressing piece 503 includes a mounting plate 5031 and a first pressing plate 5032 that are connected to each other. The mounting plate 5031 is connected with each other by screws. The second boss 5022 is connected, and the first pressing plate 5032 is pressed against the side of the diffuser 2 away from the optical film 3. By providing the pressing member 503, the edge of the diffuser 2 can be supported.

On the second boss 5022 of the second frame bar 502 above the display main body 10, a second groove 50222 is recessed corresponding to the mounting plate 5031. The second groove 50222 has a third notch facing the back plate 1 and a display facing In the fourth notch opened in the center of the module, the mounting plate 5031 is fixed in the second groove 50222 by screws. By providing the second groove 50222, the mounting plate 5031 can be accommodated, and the mounting plate 5031 is prevented from protruding from the second boss 5022. At the same time, the second groove 50222 can also reduce the installation difficulty of the pressing member 503.

Of course, it is not limited to only providing the second groove 50222 on the second boss 5022 of the second frame bar 502 above the display main body 10, and it can also be provided on the second bosses 5022 of the other two second frame bars 502. The second groove 50222.

In this embodiment, there are multiple mounting plates 5031, and the multiple mounting plates 5031 are arranged at intervals along the length of the first pressing plate 5032. The second boss 5022 is provided with second grooves 50222 corresponding to the number of the mounting plates 5031. .

In addition, the mounting plate 5031 and the first pressing plate 5032 are arranged in parallel, and they are connected by a connecting piece 5034. The connecting piece 5034 is perpendicular to the mounting plate 5031 and the first pressing plate 5032, respectively, forming a zigzag pressing piece 503.

One end of the connecting piece 5034 provided with the mounting plate 5031 is also provided with a second pressing plate 5035 spaced apart from the mounting plate 5031, the second pressing plate 5035 is arranged in the first groove 50221, and the second pressing plate 5035 is arranged between the hanging ears 301 Buffer foam. The structure in which the second pressing plate 5035 and the cushioning foam cooperate can limit the position of the hanging ear 301 and prevent the hanging ear 301 from moving along the axis of the suspension column 504.

In order to reduce the difficulty of alignment between the mounting plate 5031 and the second groove 50222, a positioning post 5033 is protrudingly provided on the mounting plate 5031, and a positioning hole is recessed on the groove wall of the second groove 50222 facing the third notch. 50223, the positioning post 5033 is inserted into the positioning hole 50223. Of course, the positions of the positioning post 5033 and the positioning hole 50223 can also be interchanged, that is, the mounting plate 5031 is provided with a positioning hole 50223, and the second groove 50222 is protrudingly provided with a positioning post 5033.

The second body 5021 has a first limiting portion 50211 extending from the second boss 5022 close to the back plate 1 and a second limiting portion 50212 extending from the second boss 5022 close to the cover 4, the first limiting portion 50211 shields The back plate 1 is adjacent to the edge of the second frame bar 502, and the height of the second limiting portion 50212 protruding from the second boss 5022 is not greater than the thickness of the cover plate 4.

The light source assembly 6 includes a PCB board arranged on the back plate 1 and an LED lamp bead arranged on the side of the PCB board away from the back plate 1. The LED lamp bead has an injection-molded shell, the shell is light-transmissive, and the diffuser plate 2 can directly abut On the surface of the shell. The injection-molded shell is not easy to be crushed by the diffuser 2 and has a long service life. Preferably, a plurality of LED lamp beads are uniformly distributed on the PCB board, and the evenly distributed LED lamp beads can provide a stable support plane for the diffuser plate 2.

Further, the surface of the LED lamp bead is protrudingly provided with at least one lamp bead convex portion, and the lamp bead convex portion abuts against the diffusion plate 2. By providing the convex part of the lamp bead, the contact area of the LED lamp bead and the diffuser plate 2 can be reduced, and excessive heat transfer of the LED lamp bead to the diffuser plate 2 can be avoided. In order to improve the stability of the supporting process, the surface of the LED lamp bead is annularly distributed with at least three lamp bead protrusions along the center of the LED lamp bead. Specifically, the surface of the LED lamp bead is annularly distributed with four lamp bead protrusions along the center of the LED lamp bead.

In one embodiment, as shown in FIG. 13, the backplane 1 is a flat plate structure, and the first frame bars 501 and the second frame bars 502 are both connected to the backplane 1. By setting the back plate 1 as a flat plate structure, the manufacturing difficulty of the back plate 1 can be reduced. The back plate 1 no longer needs to be equipped with die stamping or bending operations, and straight board blanking can be used directly, which greatly reduces the manufacturing cost. Improved production efficiency.

As shown in FIG. 13, the first frame bar 501 includes a first body 5011 and a first boss 5012 protrudingly arranged on a side of the first body 5011 close to the center of the display module. The diaphragm 3 and the diffuser plate 2 are both arranged between the first boss 5012 and the cover plate 4, one end of the first body 5011 is pasted with the cover plate 4 through an adhesive, and the other end is connected to the back plate 4 1 A side away from the light source assembly 6 is flush or protrudes from a side of the back plate 1 away from the light source assembly 6. By providing the first boss 5012, the edge of the diffuser plate 2 can be supported, the pressure applied to the LED lamp beads can be reduced, and the LED lamp beads can be protected from being crushed.

The first body 5011 is in the shape of a plate, the thickness direction of which is parallel to the display side of the cover plate 4, and a plurality of connecting frames 7 are arranged at intervals along the length direction of the first body 5011, and the connecting frames 7 include vertically connected first plates. 701 and a second plate 702, the first plate 701 is connected to the first frame bar 501, and the second plate 702 is connected to the back plate 1. By setting the connecting frame 7 on the splicing side of the display body 10 to connect the backplane 1 and the first frame bar 501, the first frame bar 501 does not need to be directly connected to the backplane 1 by screws, so the thickness of the first frame bar 501 can be achieved It is very thin, so that the non-display area between the two display bodies 10 after splicing is narrower, and the display effect is improved.

In order to reduce the difficulty of fixing, the first plate 701 is arranged on the side of the first frame strip 501 away from the optical film 3, and the second plate 702 is arranged on the back plate 1 away from the optical film 3 side. Specifically, the first plate 701 is connected to the first frame bar 501 by screws, and the second plate 702 is connected to the back plate 1 by screws. The method of screw connection is simple and reliable, and since the first plate 701 is arranged on the side of the first frame strip 501 away from the optical film 3, the second plate 702 is arranged on the back plate 1 away from the optical film 3. Said one side of the optical film 3, therefore, when assembling the entire display body 10, the screws can be tightened from the outside, which reduces the difficulty of operation.

Further, one side of the first boss 5012 is protrudingly provided with a reinforcing column 5013, the first body 5011 is provided with a threaded hole for the screw connection, and the threaded hole penetrates the reinforcing column 5013 . By arranging the reinforcing column 5013, the length of the threaded section of the threaded hole opened on the first body 5011 can be increased to ensure that the screw does not fail after being fixed. In this embodiment, the screw is a countersunk head screw, and the countersunk head screw will not protrude from the first body 5011 of the first frame bar 501.

Of course, the connecting frame 7 is not limited to using screws to connect with the back plate 1 and the first frame bar 501, and a structure in which connecting posts and screws are matched and installed can also be used. For example, the first frame bar 501 is provided with threaded holes, the back plate 1 is provided with through holes, the first plate 701 is provided with through holes corresponding to the threaded holes, and the second plate 702 is close to the back. One side of the board 1 is protrudingly provided with a connecting post, the connecting post is inserted into the through hole on the back plate 1, and the screw passes through the through hole on the first board 701 and is screwed on the first frame bar 501. Inside the threaded hole. Or, the first frame bar 501 is provided with a through hole, the back plate 1 is provided with a threaded hole, the first plate 701 is provided with a connecting post protruding, and the connecting post is inserted into the through hole on the first frame bar 501, and the screw passes through The through holes on the second board 702 are screwed into the through holes on the back plate 1.

In this embodiment, the length of the first boss 5012 extends along the length of the first body 5011, and the first body 5011 is provided with a corresponding number of reinforcing columns 5013 corresponding to the number of the connecting frames 7, and each reinforcing column 5013 Both are connected with the first boss 5012, so that the strength of the reinforcing column 5013 can be increased.

A notch is provided on the first body 5011, and the notch is opened toward a side away from the cover plate 4, and the second plate 702 is connected to the back plate 1 through the notch. By providing the notch, the connecting frame 7 is prevented from protruding from the side of the first body 5011 away from the cover plate 4.

The end surface of the end of the first body 5011 connected to the cover plate 4 is recessed with a glue groove, and the length of the glue groove runs through the length direction of the first body 5011. By setting the glue groove, it is convenient to fix the glue layer of the bonding cover 4 and prevent the glue layer from shifting.

The present application also provides a spliced smart interactive tablet. As shown in FIG. 1, the spliced smart interactive tablet includes a main screen 100, a sub-screen 200 is spliced on at least one side of the main screen 100, and both the main screen 100 and the sub-screen 200 include As with the display main body 10 of any of the above embodiments, the specific structure of the display main body 10 will not be repeated here.

The spliced smart interactive tablet also includes at least one first adjusting plate 20 and at least one second adjusting plate 30. A splicing seam 300 is formed between the main screen 100 and the secondary screen 200, and the first adjusting plate 20 is connected to the The second adjusting plate 30 is adjacent to the splicing seam 300, one end of the first adjusting plate 20 is connected to the back side of the main screen 100 by screws, and the other end is pressed against the back side of the secondary screen 200 One end of the second adjusting plate 30 is connected to the back side of the secondary screen 200 by the screw, and the other end is pressed against the back side of the main screen 100. By providing the first adjusting plate 20 and the second adjusting plate 30, the step difference between the main screen 100 and the auxiliary screen 200 along the thickness direction of the screen can be eliminated after they are installed in place, and the adjustment structure is simple, which can effectively reduce the difficulty of adjustment.

In this embodiment, a secondary screen 200 is spliced on one side of the main screen 100. In other embodiments, a secondary screen 200 is spliced on both sides of the main screen 100.

Specifically, as shown in FIG. 16, a first guide post 2001 is protrudingly provided on the first adjusting plate 20, and correspondingly, a first guide post 2001 is provided on the back plate 1 of the main screen 100 to be inserted into the first guide post 2001. The first guide hole. By providing the first guide post 2001 and the first guide hole, the installation position of the first adjustment plate 20 can be limited after the two are inserted and matched, and the installation difficulty of the first adjustment plate 20 is reduced.

Of course, the positions of the first guide post 2001 and the first guide hole can also be interchanged, that is, the first guide post 2001 is protrudingly provided on the back plate 1 of the main screen 100, and the first adjustment plate 20 A first guide hole for inserting and connecting with the first guide post 2001 is opened on the upper side.

Preferably, the first adjusting plate 20 is provided with a through hole for the screw to pass through, and one side of the through hole is provided with a first guide post 2001 at intervals. In other embodiments, two first guide posts 2001 may be provided on the first adjustment plate 20 at intervals, and the through holes on the first adjustment plate 20 are arranged between the two first guide posts 2001. By arranging two first guide posts 2001, it can be directly ensured that the through holes on the first regulating plate 20 are facing the threaded holes on the back plate 1 after the first guide posts 2001 on the first regulating plate 20 are inserted in place. Further reduce the difficulty of screw fixation.

As shown in FIG. 17, a second guide post 3001 is protrudingly provided on the second adjusting plate 30, and correspondingly, a second guide post 3001 is provided on the back plate 1 of the secondary screen 200 to be inserted into the second guide post 3001. Two pilot holes. By providing the second guide post 3001 and the second guide hole, the installation position of the second adjustment plate 30 can be limited after the two are inserted and matched, and the installation difficulty of the second adjustment plate 30 is reduced.

Of course, the positions of the second guide post 3001 and the second guide hole can also be interchanged, that is, the second guide post 3001 is protrudingly provided on the back plate 1 of the secondary screen 200, and the second adjustment plate A first guide hole for inserting with the second guide post 3001 is opened on the 30.

Preferably, the second adjusting plate 30 is provided with a through hole for the screw to pass through, and one side of the through hole is provided with a second guide post 3001 at intervals. In other embodiments, two second guide posts 3001 may be arranged on the second adjustment plate 30 at intervals, and the through holes on the second adjustment plate 30 are arranged between the two second guide posts 3001. By arranging two second guide posts 3001, after the second guide posts 3001 on the second adjustment plate 30 are inserted in place, it can be directly ensured that the through holes on the second adjustment plate 30 are facing the back plate 1 of the secondary screen 200 The threaded holes further reduce the difficulty of screw fixing.

In one embodiment, the number of the first adjusting plate 20 and/or the second adjusting plate 30 is greater than two, and the first adjusting plate 20 and the second adjusting plate 30 are alternately arranged in the splicing Seam 300 in the length direction. This design can facilitate the improvement of the adjustment effect, so that any position of the main screen 100 and the auxiliary screen 200 along the length of the entire splicing seam 300 can be ensured without misalignment.

Specifically, the first adjustment plate 20 is provided with two, the second adjustment plate 30 is provided with two, and the second adjustment plate 30, the first adjustment plate 20, and the second adjustment plate 30 are sequentially arranged in the vertical direction. The second adjusting plate 30 and the first adjusting plate 20.

In an embodiment, as shown in FIGS. 1 and 18 to 20, the frame assembly 5 of the main screen 100 includes two second frame bars 502 spaced apart in the vertical direction, which are respectively the frame bar 5023 on the main screen and the main screen The lower frame bar 5024, the frame assembly 5 of the secondary screen 200 includes two second frame bars 502 spaced apart in the vertical direction, which are the secondary screen upper frame bar 5025 and the secondary screen lower frame bar 5026. The splicing type The smart interactive tablet also includes a first assembling piece 40, which connects the main screen lower frame bar 5024 and the secondary screen lower frame bar 5026 by screws, and the first assembling piece 40 is protrudingly arranged There are two convex pillars 4001, and the two convex pillars 4001 are respectively inclined toward the main screen 100 and the secondary screen 200 away from the splicing seam 300. The main screen lower frame bar 5024 and the secondary screen lower The frame bars 5026 are respectively provided with insertion holes 5027 whose axes are arranged at an angle with the splicing seam 300, and the protruding posts 4001 are inserted into the insertion holes 5027. By arranging the first assembling piece 40, and arranging on the first assembling piece 40 with two protruding pillars 4001 inclined in different directions, the two protruding pillars 4001 can form a structure similar to the inverted "eight" shape. When the screen 200 is spliced, use the two inclined protrusions 4001 to insert into the jack 5027 and then pull the main screen 100 and the auxiliary screen 200 to move to adjust the position deviation between the main screen 100 and the auxiliary screen 200, and improve the splicing of the entire splicing smart interactive flat panel. After the display effect; by arranging the first assembling piece 40 under the splicing smart interactive tablet, it is convenient for the main screen 100 and the auxiliary screen 200 to install the first assembling piece 40 after splicing, and it is also convenient to adjust the main screen 100 and the auxiliary screen 200 Rank deviation.

In this embodiment, the two convex pillars 4001 are symmetrically arranged along the joint 300. The two symmetrically arranged protrusions 4001 can apply the same amount of pulling force to the main screen 100 and the auxiliary screen 200, thereby improving the adjustment effect.

Specifically, the convex column 4001 is tapered, and the size of the end of the convex column 4001 connected to the first assembling piece 40 is larger than the size of the end of the convex column 4001 away from the first assembling piece 40. The tapered protruding column 4001 is convenient for plugging with the socket 5027.

Preferably, the cross section of the convex column 4001 is elliptical, and the long axis direction of the convex column 4001 extends along the length direction of the lower frame bar 5024 of the main screen and the lower frame bar 5026 of the auxiliary screen.

The first assembling piece 40 is provided with a first fixing hole 4002 for screws to pass through. The first fixing hole 4002 is a waist-shaped hole. The long side of the first fixing hole 4002 is along the length of the lower frame bar 5024 of the main screen and the lower frame bar 5026 of the auxiliary screen. Extending in the direction, the lower frame bar 5024 of the main screen and the lower frame bar 5026 of the secondary screen are both provided with a first threaded hole 5028 corresponding to the first fixing hole 4002. By setting the first fixing hole 4002 on the first assembling piece 40 as a waist-shaped hole, the first fixing hole 4002 can always be in the same position as the first assembling piece 40 after adjusting the position deviation between the main screen 100 and the auxiliary screen 200. The communicating state of the first threaded hole 5028 ensures that the screw can pass through the first fixing hole 4002 and screw into the first threaded hole 5028 smoothly.

Further, the first assembling piece 40 includes a first splicing board 4003 and a second splicing board 4004 arranged at an included angle, the convex column 4001 is arranged on the first splicing board 4003, and the second splicing board 4004 has a display side opposite to the main screen 100. The logo side on the same side is provided with a LOGO logo. By arranging the first assembling piece 40 of this structure, it can not only connect the main screen 100 and the secondary screen 200, but also can be used as a LOGO board (name plate). In addition, the first assembling piece 40 is connected to the lower frame bar 5024 of the main screen and the lower frame of the secondary screen by screws The frame bar 5026 can be detachably connected, so different LOGO logos can be replaced according to actual needs to improve user experience.

The display side of the main screen 100 and the display side of the secondary screen 200 are both sides where the operator can see patterns, animations and perform touch operations when using the spliced smart interactive tablet.

Specifically, the first splicing board 4003 and the second splicing board 4004 are vertically arranged to form a first splicing piece 40 similar to the L-shape. After the first splicing board 4003 is installed, it is connected to the lower frame bar 5024 of the main screen and the lower frame bar of the sub-screen. 5026 abuts against one side far from the center of the main screen 100 and the secondary screen 200, so the first assembling piece 40 is installed in place, and the inner side of the first assembling piece 40 abuts against the bottom of the lower frame bar 5024 and the lower frame bar 5026 of the main screen. On the side, the main screen 100 and the secondary screen 200 can be misaligned in the vertical direction.

The side of the lower frame bar 5024 of the main screen away from the center of the main screen 100 and the side of the lower frame bar 5026 of the auxiliary screen away from the center of the auxiliary screen 200 are convex curved surfaces. The first splicing plate 4003 is an arc that fits the curved surface. Or, the first splicing plate 4003 is provided with an arc-shaped groove matching the arc-shaped surface.

As shown in Figures 1, 14 and 15, the upper frame bar 5023 of the main screen of the main screen 100 and the upper frame bar 5025 of the sub-screen 200 of the sub-screen 200 are connected by a second assembling piece 50, and the second assembling piece 50 is connected to the main screen by screws. The frame bar 5023 is connected to the frame bar 5025 on the secondary screen. By arranging the second assembling piece 50 and connecting the second assembling piece 50 to the two upper frames with screws, the connection reliability of the main screen 100 and the auxiliary screen 200 can be ensured.

Further, the upper frame bar 5023 of the main screen is recessed with a main screen groove, and the upper frame bar 5025 of the auxiliary screen is recessed with a sub-screen groove. The main screen groove and the auxiliary screen groove are connected to form a accommodating part for the second assembling piece 50. groove. By providing the receiving groove, the position of the second assembling piece 50 can be limited, and the difficulty of fixing the second assembling piece 50 with screws is reduced.

A side of the second assembling piece 50 away from the bottom of the receiving groove does not protrude from the notch of the receiving groove. This design can hide the second assembling piece 50 to prevent the second assembling piece 50 from being exposed to affect the appearance of the entire splicing smart interactive tablet.

The bottom of the containing groove is provided with a second threaded hole, and the second assembling piece 50 is provided with a second fixing hole. The screw passes through the second fixing hole and is screwed into the second threaded hole to fix the second assembling piece 50 in In the containment tank.

A camera assembly 60 is also arranged above the second assembling piece 50. The housing of the camera assembly 60 is respectively connected to the upper frame bar 5023 of the main screen and the upper frame bar 5025 of the secondary screen by screws. The camera assembly 60 can block the notch of the receiving groove, The entire second assembling piece 50 is completely hidden.

In the description of this article, it should be understood that the term "上" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplifying operations, and do not indicate or imply the device referred to. Or the element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In the description of this specification, the description with reference to the term "an embodiment" or the like means that a specific feature, structure, material, or characteristic of the embodiment is included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment.

In addition, it should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only includes an independent technical solution. This narration in the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole The technical solutions in the various embodiments can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the application, and cannot be interpreted as limiting the scope of protection of the application in any way. Based on the explanation here, those skilled in the art can think of other specific implementation manners of this application without creative work, and these manners will all fall within the protection scope of this application.

Claims (21)

1. A display main body includes a display module and a frame assembly. The display module includes a back plate, a diffuser plate, an optical film, and a cover plate, which are sequentially arranged on one side of the back plate, and the frame assembly is arranged on the side of the back plate. The periphery of the display module, wherein the back plate and the diffuser plate are spaced apart, a light source assembly is arranged on a side of the back plate close to the diffuser plate, and the light source assembly abuts against the diffuser plate;

   The periphery of the display module is provided with at least one splicing side and a non-splicing side, the frame assembly includes a first frame strip arranged on the splicing side and a second frame strip arranged on the non-splicing side, so The edge of the optical film adjacent to the splicing side is sandwiched between the first frame bar and the cover plate, the edge of the optical film adjacent to the non-splicing side is provided with a hanging hole, and The second frame bar is provided with a hanging column inserted into the hanging hole.
2. The display body according to claim 1, wherein the first frame bar comprises a first body and a first boss protrudingly provided on a side of the first body close to the center of the display module, the Both the optical film and the diffusion plate are arranged between the first boss and the cover plate.
3. The display body according to claim 1, wherein the second frame bar comprises a second body, and a second boss protruding from a side of the second body close to the center of the display module, the second One side of the boss is bonded to one side of the cover plate close to the optical film, and the other side is provided with the suspension column.
4. 3. The display body according to claim 3, wherein a pressing member is connected to a side of the second boss close to the back plate, and the pressing member includes a connected mounting plate and a first pressing plate, and the mounting The plate is connected with the second boss by screws, and the first pressing plate is pressed against the side of the diffuser plate away from the optical film.
5. 3. The display body according to claim 3, wherein the second body has a first limiting portion extending from a side surface of the second boss close to the back plate and extending from the second boss close to the The second limiting portion on one side of the cover plate, the first limiting portion shields the edge of the back plate adjacent to the second frame bar, and the second limiting portion protrudes from the second The height of the boss is not greater than the thickness of the cover plate.
6. The display body according to claim 1, wherein the light source assembly comprises a PCB board arranged on the back plate and an LED lamp bead arranged on a side of the PCB board facing away from the back plate, the LED lamp At least one lamp bead convex portion is protrudingly provided on the surface of the bead, and the lamp bead convex portion abuts against the diffusion plate.
7. 3. The display body according to claim 1, wherein the back plate is a flat plate structure, and the first frame bar and the second frame bar are both connected to the back plate.
8. 7. The display body according to claim 7, wherein a plurality of connecting frames are arranged at intervals along the length direction of the first frame bar, and the connecting frames comprise a first board and a second board connected vertically, the first board and The first frame bar is connected, and the second plate is connected to the back plate.
9. 8. The display body according to claim 8, wherein the first plate is arranged on a side of the first frame strip away from the optical film, and the second plate is arranged on the back plate away from the optical film. On one side of the diaphragm, the first plate is connected with the first frame bar by screws, and the second plate is connected with the back plate by screws.
10. 9. The display body according to claim 9, wherein the first frame bar comprises a first body in a plate shape, and a first boss is protrudingly provided on a side of the first body close to the optical film; The diffuser plate and the optical film are arranged between the first boss and the cover plate, one side of the first boss is protrudingly provided with a reinforcing column, and the first body is provided with A threaded hole for screwing the screw, and the threaded hole penetrates the reinforcing column.
11. A spliced intelligent interactive tablet includes a main screen, and a sub screen is spliced on at least one side of the main screen, wherein the main screen and the auxiliary screen both include the display body according to any one of claims 1 to 10.
12. The splicing smart interactive tablet according to claim 11, further comprising at least one first adjusting plate and at least one second adjusting plate, a splicing seam is formed between the main screen and the auxiliary screen, and the first Both the adjusting plate and the second adjusting plate are adjacent to the splicing seam, one end of the first adjusting plate is connected to the back side of the main screen by screws, and the other end is pressed against the back side of the secondary screen, One end of the second adjusting plate is connected to the back side of the secondary screen by the screw, and the other end is pressed against the back side of the main screen.
13. The spliced smart interactive tablet according to claim 12, wherein a first guide post is protrudingly provided on one of the first adjusting plate and the back plate of the main screen, and the first adjusting plate and The other of the two backplanes of the main screen is provided with a first guide hole for inserting and mating with the first guide post; and/or,

    A second guide post is protrudingly provided on one of the second adjusting plate and the back plate of the secondary screen, and the other of the second adjusting plate and the back plate of the secondary screen is protruding. A second guide hole that is inserted and matched with the second guide post is provided.
14. The spliced intelligent interactive tablet according to claim 12, wherein the number of the first adjusting plate and/or the second adjusting plate is greater than two, and the first adjusting plate and the second adjusting plate alternately Arranged in the length direction of the splicing seam.
15. The spliced smart interactive tablet according to claim 11, wherein the frame component of the main screen includes two second frame bars arranged at intervals along the vertical direction, which are respectively an upper frame bar on the main screen and a lower frame bar on the main screen. The frame component of the secondary screen includes two second frame bars arranged at intervals along the vertical direction, which are respectively an upper frame bar of the secondary screen and a lower frame bar of the secondary screen;

    The splicing smart interactive flat panel also includes a first splicing piece, which is respectively connected to the lower frame bar of the main screen and the lower frame bar of the sub-screen by screws, and the first splicing piece is provided with protruding Two convex pillars, the two convex pillars are respectively inclined toward the main screen and the auxiliary screen away from the splicing seam, the main screen lower frame bar and the auxiliary screen lower frame bar are respectively provided with an axis and a The splicing seam is a jack provided at an included angle, and the protruding column is inserted into the jack.
16. The splicing intelligent interactive flat panel according to claim 15, wherein the two convex posts are symmetrically arranged along the splicing seam.
17. The splicing smart interactive tablet according to claim 15, wherein the convex column is tapered, and the size of one end of the convex column connected to the first assembling piece is larger than that of the convex column away from the first assembling piece. The size of one end of the piece.
18. The spliced smart interactive tablet according to claim 15, wherein the first assembling piece is provided with a first fixing hole for the screw to pass through, the first fixing hole is a waist-shaped hole, and the first fixing hole is a waist-shaped hole. The long side of the fixing hole extends along the length direction of the lower frame bar of the main screen, and both the lower frame bar of the main screen and the lower frame bar of the auxiliary screen are provided with a first threaded hole corresponding to the first fixing hole.
19. The splicing smart interactive tablet according to any one of claims 15 to 18, wherein the first assembling piece includes a first splicing plate and a second splicing plate arranged at an included angle, and the convex column is arranged on the On the first splicing board, the second splicing board has a logo side on the same side as the display side of the main screen, and the logo side is provided with a LOGO logo.
20. The spliced smart interactive tablet according to any one of claims 15 to 18, further comprising a second assembling piece, and the second assembling piece is connected to the upper frame bar of the main screen and the upper frame of the auxiliary screen respectively by screws. Article connection.
21. The splicing smart interactive tablet according to claim 20, wherein the upper frame bar of the main screen is recessed with a main screen groove, the upper frame bar of the auxiliary screen is recessed with a sub-screen groove, and the main screen groove Communicating with the secondary screen groove to form a receiving groove for accommodating the second assembling piece, and one side of the second assembling piece away from the bottom of the receiving groove does not protrude from the notch of the receiving groove, The bottom of the receiving groove is provided with a second threaded hole, the second assembling piece is provided with a second fixing hole, and the screw passes through the second fixing hole and is screwed into the second threaded hole, So as to fix the second assembling piece in the receiving groove.

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