Blackboard with three switchable faces

Abstract

The utility model discloses a three-side switchable blackboard which comprises a board frame, and a plurality of section-switchable blackboards are evenly arranged in the board frame side by side in the length direction of the board frame. The section-capable blackboard comprises a triangular prism plate transversely placed and a shaft rod arranged on the axis of the triangular prism plate and rotationally connected with the inner walls of the left side and the right side of the plate frame, and a gear is fixedly installed on the surface of the shaft rod. A switching structure which is movably connected with the multiple section-capable blackboards at the same time is arranged in the board frame and located on the back faces of the section-capable blackboards, and the switching structure comprises a vertically-arranged rack, a sliding block arranged on the front face of the rack and a three-stage electric push rod arranged on the outer side of the board frame and connected with the sliding block. The three-stage electric push rod drives the two racks to move, all the triangular prism plates are subjected to synchronous section cutting, a new blackboard face is formed, three-time expansion of the blackboard face is achieved within the same limiting range, the blackboard writing efficiency is effectively improved, and front blackboard writing can be read back.

Description

Technical Field

[0001] The utility model belongs to the technical field of teaching aids, and particularly relates to a three-sided switchable blackboard. Background Technique

[0002] Most of the existing blackboards are fixed planes. During the teaching process, due to a large amount of teaching content and limited use space of the blackboard, the blackboard writing efficiency is low. Teachers need to repeatedly erase and write, which not only wastes teaching time, but also affects the teaching quality and efficiency, and it is difficult to review the original blackboard writing; either several blackboards are combined together, but it will occupy a large area, and the blackboard writing is inconvenient and the blackboard writing efficiency is low. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems existing in the prior art, and provides a three-sided switchable blackboard, which is used to solve the problem that the utilization rate of the blackboard writing area is not high within the limited range of the existing blackboard.

[0004] To achieve the above purpose, the utility model is realized by the following technical solutions: A three-sided switchable blackboard, including a board frame, a plurality of cuttable blackboards are uniformly arranged side by side along the length direction of the board frame inside the board frame. The cuttable blackboard includes a triangular prism plate placed horizontally, a shaft rod arranged on the axis of the triangular prism plate and rotatably connected to the left and right inner walls of the board frame, a gear is fixedly installed on the surface of the shaft rod, and a switching structure that is movably connected to a plurality of the cuttable blackboards at the same time is arranged inside the board frame and behind the cuttable blackboard. The switching structure includes a rack arranged vertically and behind the gear and meshing with the gear, two sliders arranged on the front of the rack, and a three-stage electric push rod arranged outside the board frame and connected to one of the sliders.

[0005] When one side of all the triangular prism plates faces outwards, a large blackboard surface can be formed. By driving the rack to move with the three-stage electric push rod, the synchronous cutting surface of all the triangular prism plates can be realized, so as to form a new blackboard surface. Repeating the operation can switch once again, realizing a 3-fold expansion of the blackboard surface within the same limited range, and 3 times the content can be written on the blackboard, effectively improving the utilization efficiency of the blackboard writing area, and the previous blackboard writing can be reviewed.

[0006] Optionally, the triangular prism plate is a regular triangular prism, and the distance between the axis lines of two adjacent triangular prism plates is equal to the side length of the transverse section of the triangular prism plate.

[0007] Adopting the regular triangular prism design ensures that when the triangular prism plate is cut, the rotation amplitude is unified. The distance between two adjacent triangular prism plates is accurately spaced to ensure that all the triangular prism plates can form a relatively complete blackboard surface, and the gap between two adjacent triangular prism plates is reduced as much as possible to facilitate blackboard writing.

[0008] Optionally, the rack is simultaneously engaged with the gears in all the cuttable blackboards.

[0009] When driving the rack, it can ensure that all the cuttable blackboards are switched synchronously, avoiding interference between two adjacent cuttable blackboards during rotation.

[0010] Optionally, a chute adapted to the slider is provided on the side wall of the frame, and the slider is located inside the chute and slidably connected to the frame.

[0011] The chute effectively limits and guides the slider.

[0012] Optionally, reserved openings aligned with the rack are provided on both the top wall and the bottom wall of the frame, and the length and width of the reserved openings are both greater than the length and width of the bottom surface of the rack.

[0013] The provided reserved openings allow the rack to enter the outer frame box during the up and down movement, thereby expanding the movement path of the rack.

[0014] Optionally, dust blocking strips are provided on both the left and right sides of the frame and in front of the gears, and chamfers are provided on the front edge of the dust blocking strip close to the triangular prism plate.

[0015] The dust blocking strips are used to intercept dust, prevent the dust from entering the gears and the rack from the blackboard surface, and ensure the smooth meshing of the gears and the rack.

[0016] Optionally, an outer frame box is provided outside the frame, and a dust suction structure is provided inside the outer frame box.

[0017] The outer frame box wraps the three-stage electric push rod inside to avoid children's collision. At the same time, it can also prevent the rack exposed outside the frame during the movement from being exposed. Meanwhile, the dust suction structure can quickly absorb the dust during the erasure of the blackboard writing, creating a good teaching environment for the teacher.

[0018] Optionally, the dust suction structure includes a partition provided on the inner bottom wall of the outer frame box and connected to the top wall of the frame, an air extraction pump provided inside the outer frame box and outside the partition, an air extraction pipe extending to the inside of the partition at the input end of the air extraction pump, an exhaust pipe extending to the outside of the outer frame box at the output end of the air extraction pump, and a flip plate provided on the front of the outer frame box. A plurality of dust suction ports are evenly provided on the inner bottom wall of the frame and in front of the cuttable blackboard.

[0019] The air extraction pump creates negative pressure in the space inside the partition, and then generates suction at the dust suction ports, thereby effectively and quickly absorbing the dust and preventing the dust from dispersing in the air for a long time.

[0020] Optionally, a switch board is provided at the bottom of the outer frame box. There are 3 control buttons on the switch board. The switch board is respectively connected to the three-stage electric push rod and the air extraction pump. At the lower edge of the front surface of the outer frame box, signal lights corresponding to the three control buttons on the switch board are provided.

[0021] The three-stage electric push rod and the air extraction pump can be respectively controlled through the control buttons on the switch board, so as to realize the switching of the blackboard surface and the rapid collection of dust. The control buttons on each switch board are marked by signal lights respectively to prevent the teacher from pressing the wrong control button during operation.

[0022] Optionally, the flip board is hinged to the front surface of the outer frame box through a hinge. An iron sheet is provided on the back surface of the flip board. A magnetic strip that attracts the iron sheet is provided on the bottom wall of the board frame and on the back surface of the flip board.

[0023] By turning the flip board downward regularly, the dust accumulated in the inner space of the partition can be quickly cleaned up. At the same time, after closing, the flip board can be attracted by the magnetic strip, and the operation is simple and fast.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows: 1. When one side of all the triangular prism plates faces outward, a large blackboard surface can be formed. By driving two racks to move through the three-stage electric push rod, the synchronous cutting surface of all the triangular prism plates can be carried out, so as to form a new blackboard surface. Repeating the operation can switch again, realizing a 3-fold expansion of the blackboard surface within the same limited range, allowing 3 times the content to be written on the blackboard, effectively improving the utilization efficiency of the blackboard writing area, and the previous blackboard writing can be reviewed; 2. The regular triangular prism design is adopted to ensure that when the triangular prism plates are cut, the rotation amplitude is unified. The distance between two adjacent triangular prism plates is accurately set to ensure that all the triangular prism plates can form a relatively complete blackboard surface, and the gap between two adjacent triangular prism plates is minimized as much as possible to facilitate blackboard writing; 3. The three-stage electric push rod is wrapped by the outer frame box to prevent children from colliding. At the same time, the rack exposed outside the board frame during the movement can also be avoided. At the same time, a dust absorption structure is provided to quickly absorb the dust during erasing the blackboard writing content, creating a good teaching environment for the teacher; 4. The three-stage electric push rod and the air extraction pump can be respectively controlled through the control buttons on the switch board, so as to realize the switching of the blackboard surface and the rapid collection of dust. The control buttons on each switch board are marked by signal lights respectively to prevent the teacher from pressing the wrong control button during operation; 5. By turning the flip board downward regularly, the dust accumulated in the inner space of the partition can be quickly cleaned up. At the same time, after closing, the flip board can be attracted by the magnetic strip, and the operation is simple and fast. Description of the Drawings

[0025] Figure 1 Schematic diagram of a three-sided switchable blackboard of the present utility model;

[0026] Figure 2 This is a front sectional view of a three-sided switchable blackboard of the present utility model;

[0027] Figure 3 This is a right sectional view of the board frame of the present utility model.

[0028] Figure 4 For the present utility model Figure 3 An enlarged view of part A in the present utility model;

[0029] Figure 5 This is a left sectional view of the outer frame box of the present utility model;

[0030] Figure 6 This is a top view of the partition of the present utility model.

[0031] In the figure: 1. Board frame; 11. Slide groove; 12. Reserved opening; 2. Switchable blackboard; 21. Triangular prism board; 22. Shaft rod; 23. Gear; 3. Switching structure; 31. Rack; 32. Slide block; 33. Three-stage electric push rod; 4. Outer frame box; 5. Dust collection structure; 51. Partition; 52. Air extraction pump; 53. Dust collection port; 54. Flipping plate; 55. Switching plate. Specific embodiments

[0032] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work conditions belong to the scope of protection of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0034] Such as Figure 1As shown in FIG. 2, the specific solution of the embodiment is as follows: A three-sided switchable blackboard includes a board frame 1. Inside the board frame 1, a plurality of cuttable blackboards 2 are arranged side by side evenly along the length direction of the board frame 1. The cuttable blackboard 2 includes a triangular prism board 21 placed horizontally, a shaft rod 22 arranged on the axis of the triangular prism board 21 and rotatably connected to the inner walls on the left and right sides of the board frame 1. A gear 23 is fixedly installed on the surface of the shaft rod 22. Inside the board frame 1 and on the back of the cuttable blackboard 2, there is a switching structure 3 that is movably connected to a plurality of cuttable blackboards 2 at the same time. The switching structure 3 includes a rack 31 arranged vertically and located behind the gear 23 and meshing with the gear 23, two sliders 32 arranged on the front of the rack 31, and a three-stage electric push rod 33 arranged outside the board frame 1 and connected to one of the sliders 32.

[0035] When one side of all the triangular prism boards 21 faces outward completely, a large blackboard surface can be formed. By driving the two racks 31 to move through the three-stage electric push rod 33, synchronous cutting of all the triangular prism boards 21 can be achieved, thereby forming a new blackboard surface. Repeating the operation can switch one more time, realizing a 3-fold expansion of the blackboard surface within the same limited range, allowing 3 times the content to be written on the blackboard, effectively improving the utilization efficiency of the blackboard writing area, and enabling the previous written content to be reviewed.

[0036] During the actual production process, gears 23 can be arranged on the shaft rods 22 at both ends of the triangular prism board 21, and two switching structures can be equipped for them. The two three-stage electric push rods 33 are of the same model and are controlled by one control end, so that the rotation of the triangular prism board 21 is more stable.

[0037] In this embodiment, by arranging the triangular prism board 21 horizontally, while minimizing the number of triangular prism boards 21, the thickness of the board frame 1 can be reduced to be close to the thickness of a traditional blackboard, thus ensuring the practicability of the entire solution.

[0038] Moreover, when the triangular prism board 21 is arranged horizontally, during the teacher's blackboard writing, the seams between the triangular prism boards 21 will form natural dividing lines, which can prevent the teacher from writing crookedly during blackboard writing and make the written content more integral.

[0039] As Figure 5 shown, a chute 11 adapted to the slider 32 is opened on the side wall of the board frame 1. The slider 32 is located inside the chute 11 and is slidably connected to the board frame 1. The chute 11 effectively limits and guides the slider 32.

[0040] At the same time, reserved openings 12 aligned with the rack 31 are opened on both the top wall and the bottom wall of the board frame 1. The length and width of the reserved opening 12 are both larger than the length and width of the bottom surface of the rack 31. The opened reserved openings 12 can allow the rack 31 to enter the outer frame box 4 during the up and down movement, thereby expanding the movement path of the rack 31.

[0041] like Figure 3 As shown, in the present embodiment, the triangular prism plate 21 is in the shape of a regular triangular prism and adopts a regular triangular prism design to ensure that the triangular prism plate 21 has a uniform rotation amplitude when being sectioned; the spacing between the axial lines of two adjacent triangular prism plates 21 is equal to the side length of the transverse section of the triangular prism plate 21, and precise spacing is adopted to ensure that all triangular prism plates 21 can form a relatively complete blackboard surface, and the gap between two adjacent triangular prism plates 21 is reduced as much as possible to facilitate blackboard writing.

[0042] In this embodiment, the rack 31 is meshed with the gears 23 in all the cuttable blackboards 2. When the rack 31 is driven, it can ensure that all the cuttable blackboards 2 are switched synchronously, and avoid interference between two adjacent cuttable blackboards 2 when rotating.

[0043] In this embodiment, dust blocking strips are provided on both sides of the plate frame 1 and on the front of the gear 23, and the front edge of the dust blocking strip close to the triangular prism plate 21 is chamfered. The dust blocking strip is used to intercept dust and prevent dust from entering the gear 23 and the rack 31 from the blackboard surface, thereby ensuring the smooth meshing of the gear 23 and the rack 31.

[0044] like Figure 4 As shown, an outer frame box 4 is provided on the outer side of the plate frame 1, and the three-stage electric push rod 33 is wrapped inside by the outer frame box 4 to prevent children from colliding with the three-stage electric push rod 33 during play, and to prevent the rack 31 outside the plate frame 1 from being exposed during movement.

[0045] In this embodiment, a dust suction structure 5 is provided in the outer frame box 4. When erasing the blackboard content, the dust can be quickly absorbed by the dust suction structure 5, creating a good teaching environment for the teacher.

[0046] Specifically, Figure 4 As shown, the dust suction structure 5 includes a partition 51 arranged on the inner bottom wall of the outer frame box 4 and connected to the top wall of the plate frame 1, and an air suction pump 52 arranged inside the outer frame box 4 and located on the outside of the partition 51. The input end of the air suction pump 52 is provided with an air suction pipe extending to the inside of the partition 51, and the output end of the air suction pump 52 is provided with an exhaust pipe extending to the outside of the outer frame box 4. It also includes a flip plate 54 arranged on the front side of the outer frame box 4, and a plurality of dust suction ports 53 are evenly opened on the inner bottom wall of the plate frame 1 and located on the front side of the cuttable blackboard 2.

[0047] like Figure 6 As shown, it should be noted that the top view shape of the partition 51 is "匚"-shaped, and the inner side of the partition 51 and the outer frame box 4 form a closed space, which serves as a temporary storage space for dust.

[0048] When the teacher erases the writing on the blackboard, the air extraction pump 52 is started. Through the air extraction pump 52, a negative pressure is generated in the inner space of the partition 51, and then suction is generated at the dust suction port 53, so as to effectively absorb the dust quickly and avoid the dust from dispersing in the air for a long time.

[0049] Secondly, the flip plate 54 is hinged to the front of the outer frame box 4 through a hinge. There is an iron sheet on the back of the flip plate 54, and a magnetic strip that attracts the iron sheet is provided on the bottom wall of the plate frame 1 and located on the back of the flip plate 54.

[0050] Regularly turn the flip plate 54 downward, and the dust accumulated in the inner space of the partition 51 can be quickly cleaned up. At the same time, after closing, the flip plate 54 can be attracted by the magnetic strip, and the operation is simple and fast.

[0051] In addition, a filter element is provided at one end of the air extraction pipeline away from the air extraction pump 52. When the flip plate 54 is opened, the filter element can be directly removed, cleaned or replaced.

[0052] Finally, in order to ensure the airtightness of the inner space of the partition 51, a sealing strip is adhesively bonded to the inner side of the rotating flip plate 54, and the surface where the iron sheet and the magnetic strip are connected is a polished surface. Therefore, after the rotating flip plate 54 is closed, the situation of air leakage and powder leakage in the inner space of the partition 51 can be effectively avoided.

[0053] For convenient control, a switch board 55 is provided at the bottom of the outer frame box 4, and 3 control buttons are provided on the switch board 55. The switch board 55 is respectively connected to the three-stage electric push rod 33 and the air extraction pump 52 through wires. The three-stage electric push rod 33 and the air extraction pump 52 can be respectively controlled through the control buttons on the switch board 55, so as to realize the switching of the blackboard surface and the rapid collection of dust.

[0054] In addition, signal lights corresponding to the three control buttons on the switch board 55 are provided at the lower edge of the front of the outer frame box 4; the control buttons on each switch board 55 are marked through the signal lights to prevent the teacher from pressing the wrong control button during operation.

[0055] Working principle: When one side of all the triangular prism plates 21 faces outward, a large blackboard surface can be formed. Start the three-stage electric push rod 33, drive the rack 31 to move by the three-stage electric push rod 33, and then drive all the gears 23 meshing with the rack 31 to rotate, so that all the triangular prism plates 21 rotate synchronously until all the triangular prism plates 21 complete the synchronous section, and a new blackboard surface can be formed. Repeating the operation can switch again. When erasing the blackboard, start the air extraction pump 52. The air extraction pump 52 generates a negative pressure in the inner space of the partition 51 through the air extraction pipeline, so as to generate suction at the dust suction port 53, and the dust floating in the air during blackboard erasing can be absorbed into the inner space of the partition 51, avoiding the dust from dispersing in the air for a long time.

[0056] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A three-sided switchable blackboard, characterized in that: The invention comprises a plate frame (1), wherein a plurality of cuttable blackboards (2) are evenly arranged side by side in the longitudinal direction of the plate frame (1), wherein the cuttable blackboards (2) comprise a triangular prism plate (21) placed horizontally, and a shaft (22) arranged on the axis of the triangular prism plate (21) and rotatably connected to the inner walls of the left and right sides of the plate frame (1), wherein a gear (23) is fixedly mounted on the surface of the shaft (22), and a switching structure (3) is provided inside the plate frame (1) and located on the back of the cuttable blackboard (2) and is movably connected to the plurality of cuttable blackboards (2) at the same time, wherein the switching structure (3) comprises a rack (31) arranged vertically and located on the back of the gear (23) and meshing with the gear (23), two sliders (32) arranged on the front of the rack (31), and a three-stage electric push rod (33) arranged on the outside of the plate frame (1) and connected to one of the sliders (32).

2. The three-sided switchable blackboard according to claim 1 is characterized in that: The triangular prism plate (21) is in the shape of a regular triangular prism, and the distance between the axis lines of two adjacent triangular prism plates (21) is equal to the side length of the transverse cross section of the triangular prism plate (21).

3. The three-sided switchable blackboard according to claim 1 is characterized in that: The rack (31) is meshed with the gears (23) in all the cuttable blackboards (2) simultaneously.

4. The three-sided switchable blackboard according to claim 1 is characterized in that: A sliding groove (11) adapted to the sliding block (32) is provided on the side wall of the plate frame (1); the sliding block (32) is located inside the sliding groove (11) and is slidably connected to the plate frame (1).

5. The three-sided switchable blackboard according to claim 1 is characterized in that: The top wall and the bottom wall of the plate frame (1) are both provided with a reserved opening (12) aligned with the rack (31), and the length and width of the reserved opening (12) are both greater than the length and width of the bottom surface of the rack (31).

6. The three-sided switchable blackboard according to claim 1 is characterized in that: Ash blocking strips are provided on both left and right sides of the plate frame (1) and on the front side of the gear (23), and the front edges of the ash blocking strips close to the triangular prism plate (21) are chamfered.

7. The three-sided switchable blackboard according to claim 1 is characterized in that: An outer frame box (4) is provided on the outer side of the plate frame (1), and a dust collecting structure (5) is provided inside the outer frame box (4).

8. The three-sided switchable blackboard according to claim 7 is characterized in that: The dust suction structure (5) comprises a partition (51) arranged on the inner bottom wall of the outer frame box (4) and connected to the top wall of the plate frame (1), and an air suction pump (52) arranged inside the outer frame box (4) and located outside the partition (51); the input end of the air suction pump (52) is provided with an air suction pipeline extending to the inner side of the partition (51); the output end of the air suction pump (52) is provided with an exhaust pipeline extending to the outer side of the outer frame box (4); and the dust suction structure (54) comprises a flip plate (54) arranged on the front side of the outer frame box (4); and a plurality of dust suction ports (53) are evenly opened on the inner bottom wall of the plate frame (1) and located on the front side of the cuttable blackboard (2).

9. The three-sided switchable blackboard according to claim 8 is characterized by: A switch board (55) is provided at the bottom of the outer frame box (4), and three control buttons are provided on the switch board (55). The switch board (55) is connected to the three-stage electric push rod (33) and the air pump (52) respectively, and signal lights corresponding to the three control buttons on the switch board (55) are provided at the lower edge of the front side of the outer frame box (4).

10. The three-sided switchable blackboard according to claim 8 is characterized in that: The flip plate (54) is hinged to the front side of the outer frame box (4) via a hinge, the back side of the flip plate (54) is provided with an iron sheet, and the bottom wall of the plate frame (1) and located on the back side of the flip plate (54) are provided with a magnetic stop bar that attracts the iron sheet.

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