Screen hanging structure and intelligent blackboard

Abstract

The screen hanging structure comprises a main screen hanging piece, the main screen hanging piece comprises a main screen fixing part, a first supporting part and a main screen guiding part, one end of the first supporting part is connected with the main screen fixing part, and the other end of the first supporting part extends in the direction away from the main screen fixing part; the main screen guiding part is arranged at the other end of the first supporting part, the first supporting part is provided with a supporting face, and the main screen guiding part is provided with a first guiding face obliquely extending in the direction away from the supporting face; the auxiliary screen hanging piece comprises an auxiliary screen fixing part, a second supporting part and an auxiliary screen guiding part, the second supporting part is arranged on the auxiliary screen fixing part, the auxiliary screen guiding part is arranged on the second supporting part, the auxiliary screen guiding part is provided with a second guiding face corresponding to the first guiding face, and the second supporting part makes contact with the supporting face of the first supporting part. And the first guide surface is attached to the second guide surface. The suspension structure enables the blackboard auxiliary screen to move towards the blackboard main screen, so that the gap between the blackboard main screen and the blackboard auxiliary screen is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent display equipment, and more specifically, to a screen suspension structure and a smart blackboard. Background Art

[0002] At present, smart blackboards usually include a main screen and two sub-screens on both sides. The main screen is used for touch display and writing, and interactive teaching can be achieved through pictures, videos and other forms, while the sub-screen is used for conventional chalk writing and presenting teaching content through blackboard writing. Through the integration of the main and sub-screens, smart blackboards have achieved the integration of traditional teaching and electronic teaching, improving teaching effectiveness.

[0003] When installing a conventional smart blackboard, you need to install the main wall mount and the wall mount strips on both sides of the beam on the wall. At the same time, the wall mount strips need to be installed on the back of the main and secondary screens. This solution has more matching parts, and the installation process is more complicated, which requires a higher level of installation personnel. When installing, you need to first draw the main screen wall mount position and the secondary screen wall mount strip position according to the wall surface, and punch holes one by one to fix them. There is an assembly tolerance here. The main screen is assembled on the wall mount board, and the secondary screen is assembled on the wall mount strips on both sides. The cumulative assembly tolerance is twice, resulting in a large gap between the main screen and the secondary screen. Utility Model Content

[0004] The purpose of the utility model is to provide a screen suspension structure and a smart blackboard. The smart blackboard assembled using the screen suspension structure has a small gap between the main screen and the auxiliary screen to achieve a good visual effect.

[0005] According to one aspect of the utility model, a screen suspension structure is provided, comprising:

[0006] A main screen hanger, comprising a main screen fixing portion, a first supporting portion and a main screen guiding portion, wherein one end of the first supporting portion is connected to the main screen fixing portion and the other end extends in a direction away from the main screen fixing portion, the main screen guiding portion is arranged at the other end of the first supporting portion, the first supporting portion is provided with a supporting surface, and the main screen guiding portion is provided with a first guiding surface extending obliquely in a direction away from the supporting surface;

[0007] The auxiliary screen hanger includes an auxiliary screen fixing part, a second supporting part and an auxiliary screen guiding part, wherein the second supporting part is arranged on the auxiliary screen fixing part, the auxiliary screen guiding part is arranged on the second supporting part, the auxiliary screen guiding part is provided with a second guiding surface corresponding to the first guiding surface, the second supporting part contacts with the supporting surface of the first supporting part, and the first guiding surface is in contact with the second guiding surface.

[0008] Optionally, the main screen fixing portion is L-shaped, including adjacent first fixing portions and second fixing portions, wherein the first fixing portion is connected to a horizontal frame of the blackboard main screen, and the second fixing portion is connected to a vertical frame of the blackboard main screen.

[0009] Optionally, the main screen hanger is provided with a first threaded hole, and the auxiliary screen hanger is provided with a first through hole corresponding to the first threaded hole, and a bolt passes through the first through hole and is connected to the first threaded hole to fix the main screen hanger and the auxiliary screen hanger.

[0010] Optionally, the first threaded hole is formed in the first supporting portion, and the first through hole is formed in the second supporting portion.

[0011] Optionally, the first threaded hole is provided in the main screen guide portion, and the first through hole is provided in the auxiliary screen guide portion.

[0012] Optionally, the angle between the first guide surface and the support surface ranges from 93 degrees to 97 degrees.

[0013] Optionally, the auxiliary screen hanger also includes a auxiliary screen connecting part, the auxiliary screen fixing part, the second supporting part, the auxiliary screen guide part and the auxiliary screen connecting part are all flat, the auxiliary screen fixing part, the second supporting part and the auxiliary screen connecting part are connected in sequence and arranged in a U-shape, the auxiliary screen guide part is connected to a side of the second supporting part close to the center of the auxiliary screen fixing part, and the side surface of the auxiliary screen guide part away from the second supporting part is a second guide surface.

[0014] Optionally, the main screen fixing part is also provided with a hook, and the auxiliary screen connecting part is rotatably provided with a hanging ring, the hanging ring and the hook together form a clip structure, and the main screen hanger and the auxiliary screen hanger are fixedly connected via the clip structure.

[0015] According to another aspect of the utility model, a smart blackboard is provided, comprising: a blackboard main screen and at least one blackboard secondary screen, wherein at least one side of the blackboard main screen is connected to at least one of the blackboard secondary screens through the above-mentioned screen suspension structure;

[0016] The main screen hanger of the screen suspension structure is connected to the blackboard main screen, and the secondary screen hanger is connected to the blackboard secondary screen. By connecting the secondary screen hanger to the main screen hanger, the blackboard secondary screen is connected to one side of the blackboard main screen.

[0017] Optionally, one side of the blackboard main screen is connected to the blackboard secondary screen via two screen suspension structures, and the two screen suspension structures are respectively located at the top and bottom of the blackboard main screen.

[0018] Optionally, the distance from the first guide surface to the edge of the blackboard main screen is smaller than the distance from the second guide surface to the edge of the blackboard secondary screen, so that when the edge of the blackboard main screen is in contact with the edge of the blackboard secondary screen, an interference fit is formed between the first guide surface and the second guide surface.

[0019] Optionally, the interference between the first guide surface and the second guide surface located at the top of the blackboard main screen is greater than the interference between the first guide surface and the second guide surface located at the bottom of the blackboard main screen.

[0020] Optionally, a positioning piece is provided at the edge of the blackboard secondary screen or the blackboard main screen, and the blackboard main screen or the blackboard secondary screen is provided with a positioning groove corresponding to the positioning piece, and one end of the positioning piece is inserted into the positioning groove so that the blackboard main screen is flush with the surface of the blackboard secondary screen.

[0021] Optionally, the bottom frame of the blackboard main screen is provided with a protrusion extending toward the direction of the secondary screen hanger, the protrusion is provided with a second through hole, the secondary screen hanger is provided with a second threaded hole, and a bolt passes through the second through hole and is connected to the second threaded hole to fix the blackboard main screen and the secondary screen hanger.

[0022] Optionally, there is a gap between the center line of the second threaded hole and the center line of the second through hole, and the distance between the center line of the second threaded hole and the frame of the blackboard main screen is greater than the distance between the center line of the second through hole and the frame of the blackboard main screen.

[0023] The beneficial effects of the utility model are as follows:

[0024] This practical screen hanging structure is provided with a first guide surface on the main screen hanger and a second guide surface on the secondary screen hanger, so that when the main screen hanger is connected to the secondary screen hanger, the second guide surface of the secondary screen hanger can move along the first guide surface of the main screen hanger to move the blackboard secondary screen toward the blackboard main screen, thereby reducing the gap between the blackboard main screen and the blackboard secondary screen and improving the overall effect of the smart blackboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0026] Figure 1 A schematic diagram of the back structure of the smart blackboard of the utility model is shown.

[0027] Figure 2 A partial structural schematic diagram showing the connection state of the blackboard main screen and the blackboard auxiliary screen of the utility model.

[0028] Figure 3A partial structural schematic diagram showing the blackboard main screen and the blackboard auxiliary screen of the utility model in a separated state.

[0029] Figure 4 The schematic diagram of the structure of the main screen pendant of the utility model is shown.

[0030] Figure 5 The schematic diagram of the structure of the auxiliary screen hanging component of the utility model is shown.

[0031] Figure 6 The schematic diagram of the structure of the clip structure of the utility model when connected is shown.

[0032] Figure 7 A partial structural schematic diagram showing the connection state of the blackboard main screen and the blackboard auxiliary screen of the utility model.

[0033] Figure 8 A schematic diagram showing step 1 of connecting the blackboard main screen and the blackboard auxiliary screen of the utility model.

[0034] Fig. 9 A schematic diagram showing step two of connecting the blackboard main screen and the blackboard auxiliary screen of the utility model.

[0035] Fig.10 A schematic diagram showing step three of connecting the blackboard main screen and the blackboard auxiliary screen of the utility model.

[0036] Fig.11 A partial structural schematic diagram of the ground side of the blackboard main screen and the blackboard auxiliary screen of the utility model is shown.

[0037] Fig.12 A partial bottom view of the ground side of the blackboard main screen and the blackboard auxiliary screen of the utility model is shown.

[0038] Fig.13 A partial enlarged view of the ground side of the blackboard main screen and the blackboard auxiliary screen of the utility model is shown. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the utility model, the utility model is further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the utility model.

[0040] With the vigorous development of educational informatization, smart blackboards, interactive large screens and other intelligent teaching equipment have gradually assumed the task of making informatization teaching more convenient and efficient. In the related technology, the smart blackboard includes a blackboard main screen and a blackboard sub-screen. At least one side of the blackboard main screen is provided with a blackboard sub-screen. The blackboard main screen is mostly used for electronic display, and the blackboard sub-screen is mostly used for writing. Due to the difference in the functions of the blackboard main screen and the blackboard sub-screen, the blackboard main screen and the blackboard sub-screen are manufactured separately during production and preparation. During the installation process, the main screen wall hanging plate and the sub-screen wall hanging strip are installed on the wall respectively, and then the blackboard main screen and the blackboard sub-screen are hung on the main screen wall hanging plate and the sub-screen wall hanging strip respectively. The blackboard main screen and the blackboard sub-screen together form a smart blackboard, so there will be a large gap between the blackboard main screen and the blackboard sub-screen, which affects the use effect of the smart blackboard.

[0041] Based on this, an embodiment of the present application provides a smart blackboard, in which the gap between the main screen and the secondary screen of the blackboard is small, thereby improving the user's viewing experience and usage experience.

[0042] like Figure 1 As shown, the smart blackboard includes a blackboard main screen 1 and blackboard secondary screens 2 located on both sides thereof, wherein the blackboard main screen 1 is hung on the wall, and the blackboard secondary screen 2 is not directly hung on the wall, but is connected to the blackboard main screen 1 through a screen hanging structure, and the screen hanging structure can make the blackboard secondary screen 2 close to the blackboard main screen 1, narrow the gap between the blackboard main screen 1 and the blackboard secondary screen 2, so that the smart blackboard has a good overall effect. It can be understood that both sides of the blackboard main screen 1 can be connected to the blackboard secondary screen 2, or only one blackboard secondary screen 2 can be connected to one side of the blackboard main screen 1, that is, at least one side of the blackboard main screen 1 is connected to at least one blackboard secondary screen 2 through the screen hanging structure.

[0043] like Figure 2 and Figure 3 As shown, the screen hanging structure includes a main screen hanger 10 and a sub-screen hanger 20. The main screen hanger 10 is fixedly connected to the blackboard main screen 1, and the sub-screen hanger 20 is fixedly connected to the blackboard sub-screen 2. Through the connection between the main screen hanger 10 and the sub-screen hanger 20, the blackboard sub-screen 2 can be connected to one side of the blackboard main screen 1. The main screen hanger 10 and the sub-screen hanger 20 are respectively connected to the back edges of the blackboard main screen 1 and the blackboard sub-screen 2. When the main screen hanger 10 is connected to the sub-screen hanger 20, the frame of the blackboard main screen 1 and the frame of the blackboard sub-screen 2 are abutted against each other, so that when the user views the smart blackboard from the front, the blackboard main screen 1 and the blackboard sub-screen 2 present an integrated visual effect.

[0044] like Figure 4As shown, the main screen hanger 10 includes a main screen fixing part 11, a first supporting part 12 and a main screen guiding part 13. The main screen fixing part 11 is roughly plate-shaped and is used to be fixedly connected to the blackboard main screen 1. The main screen fixing part 11 is provided with a plurality of screw holes for being fixedly connected to the blackboard main screen 1. The main screen fixing part 11 is connected to the blackboard main screen 1 by screws passing through the screw holes, so that the main screen fixing part 11 is fixed to the back surface of the blackboard main screen 1. One end of the first supporting part 12 is connected to the main screen fixing part 11, and the other end extends in a direction away from the main screen fixing part 11 to form a free end. The first supporting part 12 forms a cantilever structure, and a supporting surface 121 is provided on it. The supporting surface 121 in this embodiment is arranged horizontally. One end of the main screen guiding part 13 is connected to the first supporting part 12, and the other end extends in a direction away from the first supporting part 12, that is, the main screen guiding part 13 is connected to the free end of the first supporting part 12. The main screen guide portion 13 is provided with a first guide surface 131, which extends obliquely in a direction away from the support surface 121. The angle between the first guide surface 131 and the support surface 121 is an obtuse angle. The auxiliary screen hanger 20 can move along the extension direction of the first guide surface 131 toward the direction close to the blackboard main screen 1.

[0045] like Figure 5 As shown, the auxiliary screen hanger 20 includes an auxiliary screen fixing portion 21, a second supporting portion 22 and an auxiliary screen guide portion 23. The auxiliary screen fixing portion 21 is generally plate-shaped and is used to be fixedly connected to the blackboard auxiliary screen 2. A plurality of screw holes for being fixedly connected to the blackboard auxiliary screen 2 are provided on the auxiliary screen fixing portion 21. The screws are passed through the screw holes to connect with the blackboard auxiliary screen 2, so that the auxiliary screen fixing portion 21 is fixed to the back surface of the blackboard auxiliary screen 2. The second supporting portion 22 is arranged on the auxiliary screen fixing portion 21 and is close to one side of the main screen hanger 10. The auxiliary screen guide portion 23 is arranged on the second supporting portion 22. The auxiliary screen guide portion 23 is provided with a second guide surface 231 corresponding to the first guide surface 131. The second supporting portion 22 contacts the support surface 121 of the first supporting portion 12, and the second guide surface 231 is in contact with the first guide surface 131.

[0046] When connecting the auxiliary screen hanger 20 with the main screen hanger 10, first move the second support part 22 of the auxiliary screen hanger 20 to above the first support part 12 of the main screen hanger 10, and make the second guide surface 231 partially fit with the first guide surface 131, and then move the second guide surface 231 of the auxiliary screen hanger 20 along the first guide surface 131. Since the second guide surface 231 and the first guide surface 131 remain in contact, the auxiliary screen hanger 20 will move toward the main screen hanger 10 along the direction of the first guide surface 131, thereby moving the blackboard auxiliary screen 2 toward the direction close to the blackboard main screen 1, and finally the second support part 22 contacts the support surface 121 of the first support part 12, thereby completing the connection between the auxiliary screen hanger 20 and the main screen hanger 10. In this state, the main screen guide part 13 can block the auxiliary screen guide part 23 from moving in a direction away from the main screen hanger 10, that is, by the second guide surface 231 being in contact with the first guide surface 131, the auxiliary screen hanger 20 is prevented from being separated from the main screen hanger 10.

[0047] In one example, the auxiliary screen fixing part 21, the second supporting part 22 and the auxiliary screen guide part 23 of the auxiliary screen hanger 20 are formed by stamping and bending a plate, that is, the second supporting part 22 is formed by bending the edge part of the auxiliary screen fixing part 21, and the auxiliary screen guide part 23 is formed by bending the edge part of the second supporting part 22.

[0048] In one example, the auxiliary screen hanger 20 is generally U-shaped, including an auxiliary screen fixing portion 21, a second supporting portion 22, an auxiliary screen guide portion 23 and an auxiliary screen connecting portion 25, all of which are flat, wherein the auxiliary screen fixing portion 21 and the auxiliary screen connecting portion 25 are arranged parallel to each other, and the second supporting portion 22 is located between the auxiliary screen fixing portion 21 and the auxiliary screen connecting portion 25. One side of the auxiliary screen fixing portion 21 is bent to form the second supporting portion 22, and one side of the second supporting portion 22 away from the auxiliary screen fixing portion 21 is bent to form the auxiliary screen connecting portion 25. One side of the second supporting portion 22 close to the center of the auxiliary screen fixing portion 21 is bent to form the auxiliary screen guide portion 23, and one side surface of the auxiliary screen guide portion 23 away from the second supporting portion 22 is formed as the second guide surface 231.

[0049] In one example, the auxiliary screen fixing portion 21, the second supporting portion 22, the auxiliary screen guiding portion 23 and the auxiliary screen connecting portion 25 of the auxiliary screen hanger 20 are formed by welding of a split structure. For example, the auxiliary screen fixing portion 21 and the second supporting portion 22 are roughly L-shaped, and the auxiliary screen connecting portion 25 is also roughly L-shaped, and the two L-shaped structures are welded to form a U-shaped auxiliary screen hanger 20.

[0050] like Figure 6As shown, a hook 14 is also provided on the main screen fixing part 11, and the hook 14 is arranged in the direction of the blackboard main screen 1. A hanging ring 251 is provided on the auxiliary screen connecting part 25, and the hanging ring 251 can be rotatably connected to the auxiliary screen connecting part 25. The hanging ring 251 and the hook 14 together form a clip structure, and the main screen hanger 10 and the auxiliary screen hanger 20 are fixedly connected through the clip structure, thereby increasing the connection reliability of the blackboard main screen 1 and the blackboard auxiliary screen 2. Specifically, a rotating shaft is provided on the auxiliary screen connecting part 25, and one end of the hanging ring 251 is connected to the rotating shaft, so that the hanging ring 251 can rotate around the rotating shaft, and a handle 252 is also connected to the rotating shaft. By pulling the handle 252, the hanging ring 251 is driven to rotate, so that the hanging ring 251 can reciprocate in the direction away from or close to the blackboard main screen 1, so that the hanging ring 251 is engaged or disengaged with the hook 14.

[0051] like Figure 4 As shown, the main screen fixing part 11 of the main screen hanger 10 can be set to an L shape, including two mutually perpendicular extension parts, the two extension parts are respectively a first fixing part and a second fixing part, and the two can be respectively fixedly connected to the horizontal and vertical frames adjacent to the blackboard main screen 1 to improve the connection performance between the main screen hanger 10 and the blackboard main screen 1.

[0052] In some examples, such as Figure 4 and Figure 5 As shown, a first threaded hole 122 is provided on the main screen hanger 10, and a first through hole 221 corresponding to the first threaded hole 122 is provided on the auxiliary screen hanger 20. After the main screen hanger 10 is connected to the auxiliary screen hanger 20, the bolt 24 is passed through the first through hole 221 and connected to the first threaded hole 122, so as to fix the main screen hanger 10 and the auxiliary screen hanger 20 in connection.

[0053] In one example, a first threaded hole 122 is opened on the support surface 121 of the first support portion 12, and a corresponding first through hole 221 is opened on the second support portion 22. After the main screen hanger 10 is connected to the auxiliary screen hanger 20, the bolt 24 passes through the first through hole 221 downward in a vertical direction and is connected to the first threaded hole 122.

[0054] In one example, the first threaded hole 122 is provided in the main screen guide portion 13, and the corresponding first through hole 221 is provided in the auxiliary screen guide portion 23. After the main screen hanger 10 is connected to the auxiliary screen hanger 20, the bolt 24 passes through the first through hole 221 in the horizontal direction to connect with the first threaded hole 122. It is understandable that the first threaded hole 122 can also be provided in the auxiliary screen guide portion 23, the first through hole 221 is provided in the main screen guide portion 13, and the bolt 24 passes through the first through hole 221 in the opposite direction to the above to connect with the first threaded hole 122, so as to realize the fixed connection between the main screen hanger 10 and the auxiliary screen hanger 20. It should be noted that when the bolt 23 is used to fix the main screen hanger 10 and the auxiliary screen hanger 20, the clip structure can no longer be used to fix the main screen hanger 10 and the auxiliary screen hanger 20.

[0055] In one example, if Figure 7 As shown, the value range of the angle α between the first guide surface 131 and the support surface 121 is 93 degrees to 97 degrees, for example, the angle α is 95 degrees. When the auxiliary screen hanger 20 is connected to the main screen hanger 10, the auxiliary screen guide part 23 is facilitated to slide along the first guide surface 131, and after the blackboard auxiliary screen 2 is connected to the blackboard main screen 1, the first guide surface 131 can prevent the auxiliary screen guide part 23 from being separated from the main screen guide part 13, and apply appropriate force to the frame of the blackboard main screen 1 and the blackboard auxiliary screen 2 to avoid the problem of excessive force causing damage to the main and auxiliary screen glass. It should be noted that the second guide surface 231 and the first guide surface 131 are in contact with each other, and the angle between the second guide surface 231 and the support surface 121 is equal to the angle α between the first guide surface 131 and the support surface 121. Since the support surface 121 is parallel to the horizontal plane, the angle between the second guide surface 231 and the horizontal plane is equal to the angle between the first guide surface 131 and the support surface 121.

[0056] In some examples, one side of the blackboard main screen 1 is connected to the blackboard secondary screen 2 through two screen suspension structures, and the two screen suspension structures are respectively located at the top and bottom of the blackboard main screen 1. That is to say, the main screen hanger 10 and the secondary screen hanger 20 are respectively arranged on the sky side and the ground side of the blackboard main screen 1 and the blackboard secondary screen 2, and the blackboard main screen 1 is connected to the blackboard secondary screen 2 through the connection of the main screen hanger 10 on the sky side and the secondary screen hanger 20 on the ground side.

[0057] In some examples, the distance from the first guide surface 131 to the edge of the blackboard main screen 1 is smaller than the distance from the second guide surface 231 to the edge of the blackboard secondary screen 2, so that when the edge of the blackboard main screen 1 fits with the edge of the blackboard secondary screen 2, an interference fit is formed between the first guide surface 131 and the second guide surface 231. The first guide surface 131 on the main screen guide portion 13 extends outward from the edge of the blackboard main screen 1, and the second guide surface 231 on the secondary screen guide portion 23 is located on the inner side of the edge of the blackboard secondary screen 2. When the edge of the blackboard main screen 1 approaches the edge of the blackboard secondary screen 2, the first guide surface 131 generates a force on the second guide surface 231, and the force can generate a tendency for the second guide surface 231 to move toward the blackboard main screen 1, so that the blackboard secondary screen 2 fits tightly with the blackboard main screen 1.

[0058] In one example, the design gap between the blackboard main screen 1 and the blackboard sub-screen 2 is L mm, and the distance from the first guide surface 131 to the edge of the blackboard main screen 1 is smaller than the distance from the second guide surface 231 to the edge of the blackboard sub-screen 2, which is in the range of L to L+0.2 mm, that is, the interference amount between the first guide surface 131 and the second guide surface 231 is in the range of L to L+0.2 mm. For example, the design gap between the blackboard main screen 1 and the blackboard sub-screen 2 is 0.3 mm, and the interference amount between the first guide surface 131 and the second guide surface 231 is in the range of 0.3 to 0.5 mm.

[0059] In one example, the interference between the first guide surface 131 and the second guide surface 231 at the top of the blackboard main screen 1 is greater than the interference between the first guide surface 131 and the second guide surface 231 at the bottom of the blackboard main screen 1. That is, the interference on the sky side is greater than the interference on the ground side, so that the blackboard main screen 1 on the sky side fits the blackboard secondary screen 2 more closely than the ground side. For example, the interference on the sky side is 0.1 to 0.3 mm greater than the interference on the ground side. After the blackboard main screen 1 and the blackboard secondary screen 2 are connected, the sky side connection of the two has a tendency to separate, while the ground side connection has a tendency to approach, so that when the interference on the sky side is greater than the interference on the ground side, a greater horizontal component force can be applied to the sky side connection, thereby making the gap between the sky side connection and the ground side connection uniform, avoiding the problem that the gap at the sky side connection is greater than the gap at the ground side connection.

[0060] like Figure 2 and Figure 3 As shown, the edge of the blackboard secondary screen 2 is provided with a slat-shaped positioning member 30, and the positioning member 30 can be fixed to the back of the blackboard secondary screen 2 by screws. One side edge of the positioning member 30 is located on the outside of the blackboard secondary screen 2, and the edge of the blackboard main screen 1 is provided with a positioning groove corresponding to the shape of the positioning member 30. After the blackboard main screen 1 and the blackboard secondary screen 2 are attached, one side edge of the positioning member 30 can be inserted into the positioning groove to make the surface of the blackboard main screen 1 flush with the surface of the blackboard secondary screen 2. It can be understood that the positioning member 30 can also be set on the blackboard main screen 1, and the corresponding positioning groove is opened on the blackboard secondary screen 2. Alternatively, multiple positioning members 30 and positioning grooves are set, which are staggered on the blackboard main screen 1 and the blackboard secondary screen 2.

[0061] like Figure 8 As shown, when the blackboard sub-screen 2 is hung on the blackboard main screen 1, the second support part 22 of the sub-screen hanger 20 is first moved above the first support part 12 of the main screen hanger 10, and the second guide surface 231 is partially fitted with the first guide surface 131.

[0062] like Fig. 9As shown, under the action of gravity, the second guide surface 231 of the auxiliary screen hanger 20 moves obliquely downward along the first guide surface 131. Since the second guide surface 231 and the first guide surface 131 remain in contact, the auxiliary screen hanger 20 will move toward the main screen hanger 10 along the direction of the first guide surface 131, so that the blackboard auxiliary screen 2 moves toward the direction close to the blackboard main screen 1, and finally the second support part 22 contacts the support surface 121 of the first support part 12.

[0063] like Fig.10 As shown, the bolt 24 is connected to the first threaded hole 122 to complete the locking of the auxiliary screen hanger 20 and the main screen hanger 10, thereby completing the connection between the blackboard auxiliary screen 2 and the blackboard main screen 1.

[0064] In some examples, such as Fig.11 and Fig.12 As shown, the bottom frame of the blackboard main screen 1 is provided with a protrusion 101, and the protrusion 101 extends toward the direction of the auxiliary screen hanger 20. A second through hole 102 is opened on the protrusion 101, and a second threaded hole 271 is opened on the auxiliary screen hanger 20. The second threaded hole 271 is arranged corresponding to the second through hole 102, and a bolt is passed through the second through hole 102 and connected with the second threaded hole 271 to realize the fixed connection between the auxiliary screen hanger 20 and the frame of the blackboard main screen 1, thereby realizing the fixed connection between the blackboard auxiliary screen 2 and the blackboard main screen 1.

[0065] Specifically, the protrusion 101 is in the shape of a flat plate, which is formed integrally with the bottom frame of the blackboard main screen 1. The protrusion 101 extends to the auxiliary screen fixing portion 21 of the auxiliary screen hanger 20. A connecting plate 27 is provided at the bottom of the auxiliary screen fixing portion 21, and the protrusion 101 is in contact with the connecting plate 27. The second threaded hole 271 is provided on the connecting plate 27, and the second through hole 102 is provided on the protrusion 101 and is arranged corresponding to the second threaded hole 271. The second threaded hole 271 can be provided in plurality, and accordingly, the second through hole 102 is also provided in plurality.

[0066] In one example, there is a gap between the center line of the second threaded hole 271 and the center line of the second through hole 102, that is, the two are not coaxially arranged, and the distance between the center line of the second threaded hole 271 and the frame of the blackboard main screen 1 is greater than the distance between the center line of the second through hole 102 and the frame of the blackboard main screen 1. Along the direction from the blackboard main screen 1 to the blackboard secondary screen 2, the center line of the second through hole 102 is closer to the vertical frame of the blackboard main screen 1 than the center line of the second threaded hole 271, that is, the second threaded hole 271 is offset relative to the direction of the second through hole 102 toward the blackboard secondary screen 2. When the bolt passes through the second through hole 102 and is connected to the second threaded hole 271, the second threaded hole 271 can be moved toward the blackboard main screen 1, thereby realizing the movement of the blackboard secondary screen 2 toward the blackboard main screen 1, and then realizing the reduction of the gap between the vertical frame of the blackboard main screen 1 and the vertical frame of the blackboard secondary screen 2. It can be understood that the center lines of the second through hole 102 and the second threaded hole 271 may have a distance only in the direction from the blackboard main screen 1 to the blackboard auxiliary screen 2, and in the direction perpendicular to the direction, the center lines of the two are on the same straight line.

[0067] In an example, the design gap between the blackboard main screen 1 and the blackboard sub-screen 2 is L mm, and the distance between the center direction of the second through hole 102 and the center line of the second threaded hole 271 ranges from L to L+0.2 mm. For example, the design gap between the blackboard main screen 1 and the blackboard sub-screen 2 is 0.3 mm, and the distance between the center direction of the second through hole 102 and the center line of the second threaded hole 271 ranges from 0.3 mm to 0.5 mm.

[0068] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0069] It should also be noted that, in the description of the present utility model, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A screen suspension structure, characterized in that: include: A main screen hanger, comprising a main screen fixing portion, a first supporting portion and a main screen guiding portion, wherein one end of the first supporting portion is connected to the main screen fixing portion and the other end extends in a direction away from the main screen fixing portion, the main screen guiding portion is arranged at the other end of the first supporting portion, the first supporting portion is provided with a supporting surface, and the main screen guiding portion is provided with a first guiding surface extending obliquely in a direction away from the supporting surface; The auxiliary screen hanger includes an auxiliary screen fixing part, a second supporting part and an auxiliary screen guiding part, wherein the second supporting part is arranged on the auxiliary screen fixing part, the auxiliary screen guiding part is arranged on the second supporting part, the auxiliary screen guiding part is provided with a second guiding surface corresponding to the first guiding surface, the second supporting part contacts with the supporting surface of the first supporting part, and the first guiding surface is in contact with the second guiding surface.

2. The screen suspension structure according to claim 1, characterized in that: The main screen fixing part is L-shaped, and includes adjacent first fixing part and second fixing part, wherein the first fixing part is connected to the horizontal frame of the blackboard main screen, and the second fixing part is connected to the vertical frame of the blackboard main screen.

3. The screen suspension structure according to claim 1, characterized in that: The main screen hanger is provided with a first threaded hole, and the auxiliary screen hanger is provided with a first through hole corresponding to the first threaded hole. A bolt passes through the first through hole and is connected to the first threaded hole to fix the main screen hanger and the auxiliary screen hanger.

4. The screen suspension structure according to claim 3, characterized in that: The first threaded hole is formed in the first supporting portion, and the first through hole is formed in the second supporting portion.

5. The screen suspension structure according to claim 3, characterized in that: The first threaded hole is provided in the main screen guide portion, and the first through hole is provided in the auxiliary screen guide portion.

6. The screen suspension structure according to claim 1, characterized in that: The angle between the first guide surface and the support surface ranges from 93 degrees to 97 degrees.

7. The screen suspension structure according to claim 1, characterized in that: The auxiliary screen hanger also includes a auxiliary screen connecting part, the auxiliary screen fixing part, the second supporting part, the auxiliary screen guiding part and the auxiliary screen connecting part are all flat, the auxiliary screen fixing part, the second supporting part and the auxiliary screen connecting part are connected in sequence and arranged in a U-shape, the auxiliary screen guiding part is connected to a side of the second supporting part close to the center of the auxiliary screen fixing part, and a side surface of the auxiliary screen guide part away from the second supporting part is a second guide surface.

8. The screen suspension structure according to claim 7, characterized in that: The main screen fixing part is also provided with a hook, and the auxiliary screen connecting part is provided with a rotatable hanging ring. The hanging ring and the hook together form a clip structure, and the main screen hanging part and the auxiliary screen hanging part are fixedly connected through the clip structure.

9. A smart blackboard, characterized in that: include: A blackboard main screen and at least one blackboard sub-screen, wherein at least one side of the blackboard main screen is connected to at least one of the blackboard sub-screens via a screen suspension structure as claimed in any one of claims 1 to 8; The main screen hanger of the screen suspension structure is connected to the blackboard main screen, and the secondary screen hanger is connected to the blackboard secondary screen. By connecting the secondary screen hanger to the main screen hanger, the blackboard secondary screen is connected to one side of the blackboard main screen.

10. The smart blackboard according to claim 9, characterized in that: One side of the blackboard main screen is connected to the blackboard secondary screen via two screen suspension structures, and the two screen suspension structures are respectively located at the top and bottom of the blackboard main screen.

11. The smart blackboard according to claim 10, characterized in that: The distance from the first guide surface to the edge of the blackboard main screen is smaller than the distance from the second guide surface to the edge of the blackboard secondary screen, so that when the edge of the blackboard main screen is in contact with the edge of the blackboard secondary screen, an interference fit is formed between the first guide surface and the second guide surface.

12. The smart blackboard according to claim 11, characterized in that: The interference amount between the first guide surface and the second guide surface located at the top of the blackboard main screen is greater than the interference amount between the first guide surface and the second guide surface located at the bottom of the blackboard main screen.

13. The smart blackboard according to claim 9, characterized in that: A positioning piece is provided at the edge of the blackboard secondary screen or the blackboard main screen, and a positioning groove corresponding to the positioning piece is provided on the blackboard main screen or the blackboard secondary screen. One end of the positioning piece is inserted into the positioning groove so that the surface of the blackboard main screen is flush with that of the blackboard secondary screen.

14. The smart blackboard according to claim 9, characterized in that: The bottom frame of the blackboard main screen is provided with a protrusion extending toward the direction of the auxiliary screen hanger, the protrusion is provided with a second through hole, the auxiliary screen hanger is provided with a second threaded hole, and a bolt passes through the second through hole and is connected with the second threaded hole to fix the blackboard main screen and the auxiliary screen hanger.

15. The smart blackboard according to claim 14, characterized in that: There is a gap between the center line of the second threaded hole and the center line of the second through hole, and the distance between the center line of the second threaded hole and the frame of the blackboard main screen is greater than the distance between the center line of the second through hole and the frame of the blackboard main screen.

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