Portable teaching blackboard screen

Abstract

The utility model relates to a portable teaching blackboard screen which comprises a teaching blackboard screen body, a mounting assembly is mounted at the rear end of the teaching blackboard screen body, a limiting assembly is mounted on the inner side of the mounting assembly, the mounting assembly comprises two mounting plates, and first shells are fixedly connected to the four corners of the mounting plates correspondingly; a mounting block is movably connected to the front end penetrating through the first shell, a first spring is mounted between the outer side of the mounting block and the first shell, a magnet is fixedly connected to the rear end of the first spring, mounting rods are arranged between the two mounting plates and close to the two sides, and limiting rods are movably connected to the side walls penetrating through the mounting rods; the small teaching blackboard screen convenient to carry can be conveniently mounted and dismounted on the metal blackboard, the friction force between the small teaching blackboard screen and the metal blackboard surface can be improved, the fixing effect of the teaching blackboard screen mounted on the metal blackboard is improved, and the situation that the teaching blackboard screen is prone to displacement after being mounted on the metal blackboard is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of teaching blackboard screens, and in particular to a convenient and portable teaching blackboard screen. Background Art

[0002] The teaching blackboard screen is a small, portable screen device, usually installed on the blackboard to play teaching content such as videos or pictures. Teachers can use the teaching blackboard screen to show students teaching materials, teaching videos, real-time demonstrations, etc. The main features of this device are portability and ease of operation, allowing teachers to use multimedia teaching resources more flexibly in the classroom and improve teaching effectiveness.

[0003] However, in actual applications, the existing teaching blackboard screen is usually installed on the metal blackboard by magnetic attraction when in use, which is not convenient for disassembly, and when the teaching blackboard screen is installed by magnetic attraction, the teaching blackboard screen is prone to displacement.

[0004] Therefore, those skilled in the art provide a convenient and portable teaching blackboard screen to solve the problems raised in the above background technology. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the present application provides a convenient and portable teaching blackboard screen.

[0006] The present application provides a convenient and portable teaching blackboard screen that adopts the following technical solutions:

[0007] A convenient and portable teaching blackboard screen comprises a teaching blackboard screen, a mounting assembly is installed at the rear end of the teaching blackboard screen, a limiting assembly is installed on the inner side of the mounting assembly, the mounting assembly comprises two mounting plates, the four corners of the mounting plates are respectively fixedly connected with a first shell, a mounting block is movably connected to the front end of the first shell, a first spring is installed between the outer side of the mounting block and the first shell, a magnet is fixedly connected to the rear end of the first spring, mounting rods are respectively arranged on both sides between the two mounting plates, the limiting rod is movably connected to the side wall of the mounting rod, a second spring is installed between the outer side of the limiting rod and the mounting rod, a pull rod is fixedly connected to the middle part of the mounting rod, a cam is movably connected to the end of the pull rod, a limiting plate is fixedly connected to the side of the mounting plate, the cam is in contact with the limiting plate, and a moving block is fixedly connected to the upper and lower ends of the mounting rod.

[0008] Preferably, the limiting assembly includes a second shell, a rear end of the second shell is movably connected to an extrusion block, a front end of the extrusion block is fixedly connected to a short rod, the short rod passes through the rear end of the second shell, and a third spring is installed between the outer side of the short rod and the second shell.

[0009] Preferably, the moving block passes through a through hole formed in the side wall of the first shell and contacts the magnet, the contact surfaces of the moving block and the magnet are both inclined, and the upper end of the moving block is fixedly connected to the limiting block.

[0010] Preferably, a groove is provided on the surface of the limiting piece in contact with the cam, and the groove fits with the protrusion of the cam.

[0011] Preferably, a plurality of rubber strips are fixedly connected to the rear end of the extrusion block, and the plurality of rubber strips are all horizontally arranged.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] 1. The protrusion of the rotating cam contacts the limit plate, and the cam cooperates with the pull rod to drive the moving blocks at the upper and lower ends to squeeze the magnets to move along the direction of the limit rod. The magnets are away from the metal blackboard surface, which is convenient for disassembly of the teaching blackboard screen. It has the effect of conveniently installing and disassembling the small teaching blackboard screen that is easy to carry on the metal blackboard.

[0014] 2. The third spring pushes the extrusion block toward the metal blackboard surface along the direction of the short rod. When the horizontal rubber strip at the rear end of the extrusion block contacts the metal blackboard surface, the friction between the extrusion block and the metal blackboard surface is increased. The friction between the extrusion block and the metal blackboard surface can be increased, and the fixing effect of the teaching blackboard screen installed on the metal blackboard can be improved to prevent the teaching blackboard screen from being easily displaced after being installed on the metal blackboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of this application;

[0016] Figure 2 It is a rear perspective view of the present application;

[0017] Figure 3 It is a schematic diagram of the structure of the installation assembly of the present application;

[0018] Figure 4 is a cross-sectional view of the first shell of the present application;

[0019] Figure 5 It is a cross-sectional view of the second shell of the present application.

[0020] Explanation of the accompanying drawings: 1. Installation assembly; 101. Installation plate; 102. First shell; 103. Installation block; 104. First spring; 105. Magnet; 106. Installation rod; 107. Limit rod; 108. Second spring; 109. Pull rod; 110. Cam; 111. Limit plate; 112. Moving block; 2. Limit assembly; 201. Second shell; 202. Extrusion block; 203. Short rod; 204. Third spring; 3. Teaching blackboard screen. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] like Figure 1-4 As shown, the present application discloses a convenient and portable teaching blackboard screen, including a teaching blackboard screen 3, a mounting assembly 1 is installed at the rear end of the teaching blackboard screen 3, a limited position assembly 2 is installed on the inner side of the mounting assembly 1, the mounting assembly 1 includes two mounting plates 101, four corners of the mounting plates 101 are respectively installed with a first shell 102, a mounting block 103 is installed through the front end of the first shell 102, a first spring 104 is installed between the outer side of the mounting block 103 and the first shell 102, a magnet 105 is installed at the rear end of the first spring 104, mounting rods 106 are respectively installed on both sides between the two mounting plates 101, and the mounting rods 106 are installed through the mounting rods 106. A limit rod 107 is installed on the side wall of the first housing 106, a second spring 108 is installed between the outer side of the limit rod 107 and the mounting rod 106, a pull rod 109 is installed in the middle of the mounting rod 106, a cam 110 is installed at the end of the pull rod 109, a limit piece 111 is installed on the side of the mounting plate 101, the cam 110 is in contact with the limit piece 111, and moving blocks 112 are installed at the upper and lower ends of the mounting rod 106 respectively, the moving block 112 passes through the through hole opened on the side wall of the first housing 102 and contacts with the magnet 105, the contact surfaces of the moving block 112 and the magnet 105 are both inclined, and a limit block is installed on the upper end of the moving block 112;

[0024] The magnet 105 in the first shell 102 attracts the metal blackboard, thereby installing the teaching blackboard screen 3 on the metal blackboard. When the teaching blackboard screen 3 needs to be removed from the metal blackboard, the rotating rod on the cam 110 is moved to drive the cam 110 to rotate. The cam 110 contacts the limiting plate 111. The cam 110 drives the installation rod 106 to move along the direction of the limiting rod 107 through the pull rod 109. When the installation rod 106 drives the moving block 112 to move toward the magnet 105, the magnet 105 is driven away from the metal blackboard surface through the inclined contact surface, thereby facilitating the disassembly of the teaching blackboard screen 3 installed on the metal blackboard.

[0025] like Figure 5As shown, the limiting assembly 2 includes a second shell 201, a squeezing block 202 is installed at the rear end of the second shell 201, a short rod 203 is installed at the front end of the squeezing block 202, the short rod 203 passes through the rear end of the second shell 201, and a third spring 204 is installed between the outer side of the short rod 203 and the second shell 201, and the third spring 204 pushes the squeezing block 202 in the second shell 201 along the direction of the short rod 203 to contact the metal blackboard surface.

[0026] like Figure 1-3 As shown, a slot is provided on the contact surface of the limiting piece 111 and the cam 110 , and the slot fits with the protrusion of the cam 110 . When the protrusion of the cam 110 contacts the slot on the limiting piece 111 , the cam 110 can be limited.

[0027] like Figure 2 , 5 As shown, a plurality of rubber strips are installed at the rear end of the extrusion block 202, and the plurality of rubber strips are all horizontally arranged. By arranging the horizontally arranged rubber strips, the friction force can be increased when the rubber strips contact the metal blackboard surface.

[0028] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0029] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] The implementation principle of a convenient and portable teaching blackboard screen in the embodiment of the present application is:

[0031] When in use, the mounting assembly 1 at the rear end of the teaching blackboard screen 3 is attached to the metal blackboard surface. After adjusting the position of the teaching blackboard screen 3, the protrusion of the rotating cam 110 is away from the limiting piece 111, and the second spring 108 drives the mounting rod 106 to move along the direction of the limiting rod 107. The mounting rod 106 drives the moving blocks 112 at the upper and lower ends away from the magnet 105. The first spring 104 pushes the mounting block 103 to drive the magnet 105 to contact the metal blackboard surface to fix the position of the teaching blackboard screen 3. When the teaching blackboard screen 3 needs to be disassembled, the protrusion of the rotating cam 110 contacts the limiting piece 111. 1, the cam 110 drives the pull rod 109 and the mounting rod 106 to move, the second spring 108 is compressed under the squeezing of the mounting rod 106, and the second spring 108 has a tendency to push the mounting rod 106 to move, driving the protrusion of the cam 110 to closely contact the slot on the limiting plate 111 for fixation, and the moving blocks 112 at the upper and lower ends of the mounting rod 106 move toward the magnet 105, pushing the magnet 105 away from the metal blackboard surface and moving toward the inner side of the first shell 102, the attraction between the magnet 105 and the metal blackboard surface is reduced, and the teaching blackboard screen 3 can be easily disassembled.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A portable teaching blackboard screen, comprising a teaching blackboard screen (3), wherein a mounting assembly (1) is mounted on the rear end of the teaching blackboard screen (3), and a limit assembly (2) is mounted on the inner side of the mounting assembly (1), characterized in that: The mounting assembly (1) comprises two mounting plates (101), the four corners of the mounting plates (101) are respectively fixedly connected to a first shell (102), a mounting block (103) is movably connected to the front end of the first shell (102), a first spring (104) is installed between the outer side of the mounting block (103) and the first shell (102), a magnet (105) is fixedly connected to the rear end of the first spring (104), mounting rods (106) are respectively arranged on both sides between the two mounting plates (101), and the mounting rods (106) are inserted through the mounting rods (106). 06) is movably connected to a limit rod (107) on the side wall, a second spring (108) is installed between the outer side of the limit rod (107) and the mounting rod (106), a pull rod (109) is fixedly connected to the middle of the mounting rod (106), a cam (110) is movably connected to the end of the pull rod (109), a limit plate (111) is fixedly connected to the side edge of the mounting plate (101), the cam (110) is in contact with the limit plate (111), and a moving block (112) is fixedly connected to the upper and lower ends of the mounting rod (106) respectively.

2. A portable teaching blackboard screen according to claim 1, characterized in that: The limiting assembly (2) comprises a second shell (201), a rear end of the second shell (201) being movably connected to an extrusion block (202), a front end of the extrusion block (202) being fixedly connected to a short rod (203), the short rod (203) being passed through the rear end of the second shell (201), and a third spring (204) being installed between the outer side of the short rod (203) and the second shell (201).

3. A portable teaching blackboard screen according to claim 1, characterized in that: The moving block (112) passes through a through hole provided in the side wall of the first shell (102) and contacts the magnet (105); the contact surfaces of the moving block (112) and the magnet (105) are both designed to be inclined; and the upper end of the moving block (112) is fixedly connected to the limiting block.

4. A portable teaching blackboard screen according to claim 1, characterized in that: A clamping groove is provided on the surface of the limiting piece (111) that contacts the cam (110), and the clamping groove fits with the protrusion of the cam (110).

5. The portable teaching blackboard screen according to claim 2 is characterized in that: A plurality of rubber strips are fixedly connected to the rear end of the extrusion block (202), and the plurality of rubber strips are all arranged horizontally.

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