KR20030064526A - Automatic height setting blackboard - Google Patents

Abstract

PURPOSE: An automatically ascending/descending blackboard is provided in which the blackboard is vertically moved by rotating a gear formed magnetic roller using motor. CONSTITUTION: The automatically ascending/descending blackboard comprises a blackboard(11); a metallic plate(21) installed at upper and lower sides of the blackboard; a magnetic roller rotationally installed with being contacted with the metallic plate; a motor for vertically moving the metallic plate and blackboard by rotating the magnetic roller forward and reversely; and a grip means for preventing slipping of the magnetic roller and metallic plate, wherein the grip means(50) comprises a gear part(51) formed on the outer circumferential surface of the magnetic roller, and a plural gear groove parts(52) vertically formed on the metallic plate so that the gear part is locked to the gear groove parts, and wherein the automatically ascending/descending blackboard further comprises an eraser for erasing the surface of the blackboard as it is being transferred on the blackboard from side to side.

Description

Automatic lifting blackboard {Automatic height setting blackboard}

The present invention relates to an automatic elevating blackboard that automatically adjusts the height of a blackboard, and more particularly, to an automatic elevating blackboard capable of moving a blackboard by rotating a magnetic roller having a gear formed thereon by a motor.

In general, the hoisting device of the board is mainly used by a manual method when using a spring or a gas spring, and an automatic method when connecting to a motor using a wire or a chain or gear and a hydraulic method.

However, the above-mentioned automatic elevating blackboard according to the prior art has a problem that the operator has to raise the blackboard by hand when using a spring or a gas spring, and when using a chain or a gear, there is a problem that the chain is separated from the gear. have. In addition, in the case of using a wire, the wire is stretched when the room temperature is increased, and the wire is broken by its own weight. In the case of the hydraulic method, the structure is complicated by using a large number of parts, and it takes a lot of time to manufacture and install. If the construction is not precise, there is a problem that the board is raised and raised when the board is raised and noise is generated.

The present invention has been made to solve the above problems, by operating the driving means as necessary to smoothly and quietly elevate the blackboard, it is possible to drive accurately by preventing the skid and the skid, and produced by the simplified structure Its purpose is to provide an automatic elevating blackboard that improves learning efficiency, which is easy to install and saves manufacturing costs, and can be applied to a blackboard formed in a flat or curved surface.

1 is a rear perspective view of the automatic elevating blackboard according to the present invention;

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a cross-sectional view taken along the line B-B of FIG.

Figure 4 is a side view of the guide means of the automatic elevating blackboard according to the present invention,

5 is a side view of the balance maintaining means of the automatic elevating blackboard according to the present invention;

6 is a side view showing the lifting means according to the present invention,

7 is an enlarged cross-sectional view illustrating a coupling state of a driving motor, a magnetic roller, and a metal plate according to the present invention;

8 is a front perspective view showing another embodiment of the automatic elevating blackboard according to the present invention;

9 is a cross-sectional view taken along the line C-C of FIG.

10 is a side view showing the erasing means according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: frame 11: blackboard

12: Left panel 13: Right panel

14: upper panel 15: lower panel

20: lifting means 21: metal plate

24: motor 25: bracket

27: axis of rotation 28: magnet

29: magnetic material 30: guide means

31: guide rod 32: guide member

33, 34: Bracket 40: Balance maintenance means

41: gas cylinder 42: piston

43, 44: Bracket R: Magnetic roller

50: gear 51: gear groove

60: erase means 61: front cover

62: left side cover 63: right side cover

64: lower guide 65: upper guide

66: rod 68: blind eraser

69: dust pain

The present invention for realizing the above object is a blackboard, a metal plate installed in the vertical direction on the blackboard, a magnetic roller installed to be rotatable in contact with the metal plate, the magnetic roller is rotated forward and reverse, the metal plate and the blackboard It comprises a motor for moving the shaft, and the bite means for preventing the magnetic roller and the sliding of the metal plate.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Figure is a rear perspective view of the automatic elevating blackboard according to the present invention.

As shown in FIG. 1, the automatic elevating blackboard according to the present invention has a quadrangular frame 10 formed of left and right panels 12 and 13 and upper and lower panels 14 and 15, and the frame. The board 11 installed inside the 10, the lifting means 20 for moving the board 11 and the frame 10 up and down, and the board 11 when the board 11 is lifted and guided. Consists of a guide means 30 which is moved while being moved, and a balance maintaining means 40 for maintaining the balance of the weight of the blackboard in order to easily perform the vertical movement of the blackboard (11).

As shown in detail in FIGS. 1 and 7, the elevating means 20 is installed on the rear of the blackboard 11 in a vertical direction and is formed of a magnetic material and is in contact with the metal plate 21. The motor rotates in the state and the magnetic roller (R) having a magnet 28 to lift the metal plate 21, the frame 10 and the blackboard 11, and the motor to rotate the magnetic roller (R) forward and reverse And a bite means 50 for preventing slipping when the magnetic roller is rotated to rotate the metal plate.

The motor 24 includes brake means (not shown) for braking the rotating shaft 27 of the motor when not in operation.

On the other hand, the upper and lower ends 22 and 23 of the metal plate 21 are bent to the upper and lower panels 14 and 15 by means of bolts, respectively, and the motor 24 is attached to the wall surface. The magnetic roller R is fixed to the attached bracket 25, and the magnetic roller R is formed of a magnetic body 29 having the magnet 28 embedded therein so that the rotary shaft 27 is fitted to one end of the magnetic body 29 to set screw ( 29a).

The biting means 50 is a gear portion 51 formed on the outer circumferential surface of the magnetic roller (R) and the gear formed in plurality in the vertical direction on the metal plate 21 so that the gear portion 51 is moved in the vertical direction It consists of the groove part 52.

On the other hand, the guide means 30, as shown in Figures 1 and 4, the upper and lower ends are connected to the brackets 33, 34 fastened to the upper and lower panels 14, 15, respectively, It consists of a pair of guide rods 31 respectively disposed on both rear sides of the blackboard 11 and guide members 32 attached to the wall and inserted into the guide rods 31 to move.

In addition, the balance maintaining means 40 is fixed to the bracket 43 attached to the wall surface of the gas cylinder 41 and the gas cylinder 41 disposed on both sides of the rear side of the blackboard 11, and up and down on the gas cylinder 41 A piston (not shown) built in to be movable and an upper end thereof are fixed to the bracket 44 fastened to the upper panel 14 and a lower end of the piston rod 42 connected to the piston (not shown).

Hereinafter, the operation of the present invention will be described.

When the board 11 is to be raised, when the rotary shaft 27 is rotated forward by operating the motor 24, the magnetic roller R connected to the rotary shaft 27 is rotated. When the magnetic roller (R) is rotated, the magnetic roller (R) in close contact with the metal plate 21 and the gear portion 51 caught in the gear groove portion 52 is rotated, the metal plate 21 and the blackboard Move (11) upward. Therefore, the frame 10 and the blackboard 11 to which the metal plate 11 is fixed are raised. When the blackboard 11 is raised to a predetermined height and the operation of the motor 24 is stopped, the rotating shaft and the magnetic roller R are braked by the brake to fix the height of the blackboard 11.

On the other hand, when the blackboard 11 is to be lowered, when the rotary shaft 27 is rotated in reverse by operating the motor 24, the magnetic roller R and the gear part 51 are reversed to rotate the blackboard. (11) is lowered.

In addition, when the blackboard is elevated, the guide rod 31 fixed to the frame 10 is lifted while being guided to the guide member 32 attached to the wall, the blackboard can be elevated smoothly without shaking.

In addition, since most of the weight of the blackboard 11 is hung on the gas cylinder 41 by the gas cylinder 41, the weight of the blackboard 11 is reduced when the blackboard 11 is raised and lowered. The blackboard 11 is lifted.

As described above with reference to the illustrated drawings, the condensation apparatus of a dry-use drum washing machine according to the present invention, the present invention is not limited by the embodiments and drawings disclosed herein to those skilled in the art within the technical scope of the invention Of course, various modifications can be made, including materials. For example, the shape of the blackboard 11 may be applied to both curved and flat surfaces, and may be applied to a learning board such as a learning blackboard or a bulletin board or an OHP screen.

8 is a front perspective view showing another embodiment of the automatic elevating blackboard according to the present invention, Figure 9 is a cross-sectional view taken along the line C-C of Figure 8, Figure 10 is a side view showing the erase means according to the present invention.

In addition, the automatic lifting blackboard is attached to the front surface of the blackboard 11, as shown in Figure 8, while moving in the left and right direction rubbing the blackboard surface and erase means for erasing the written on the blackboard surface 60 It may be configured to include.

The erasing means 60 is formed of a front cover 61 and left and right side covers 62 and 63 which are bent to both sides of the front cover 61 to prevent dust from escaping outward.

Then, the upper and lower sides of the front cover 61 are bent to form upper and lower guides 64 and 65 to prevent the removal of the erasing means 60.

Inside the erasing means 60, two rods 66 driven inwardly are installed and rotated to erase written letters on the blackboard surface, and a square eraser 68 is disposed between the rods 66. It rubs against the blackboard 11 and erases the written text on the surface of the blackboard.

Here, the erasing means 60 is provided with a dust container 69 to collect and collect the dust separated from the blackboard surface at the bottom. The dust container 69 is preferably formed in a drawer type so as to be easily removable.

The automatic elevating blackboard according to the present invention comprises a magnetic roller having a gear installed to be rotatable in contact with a metal plate installed in a vertical direction on a blackboard, and a motor for rotating the magnetic roller forward and backward, and operating the motor. The magnetic roller and the gear unit are rotated so that the metal plate is bitten by the magnetic force and the gear groove formed on the metal plate, and the metal plate and the board are lifted, so that the board can be lifted smoothly and accurately, and the structure is simplified and the installation is simple. The manufacturing cost is reduced, and it can be applied to a blackboard formed in a flat or curved surface, thereby improving the learning efficiency.

Claims (3)

A blackboard, a metal plate installed on the board in a vertical direction, a magnetic roller installed in contact with the metal plate to be rotatable, a motor for rotating the metal plate and the blackboard by rotating the magnetic roller forward and backward, and the magnetic roller. Automatic lifting board, characterized in that it comprises a bite means for preventing the sliding of the metal plate. The method of claim 1, The bite means is an automatic lifting board, characterized in that the gear portion formed on the outer circumferential surface of the magnetic roller, and the gear groove portion formed in the metal plate in the vertical direction so that the gear portion is bite. The method according to claim 1 and 2, The automatic elevating blackboard is an automatic elevating blackboard, characterized in that it further comprises a device for erasing the blackboard surface while being transferred to the left and right directions on the blackboard.