CN209813537U - Blackboard with automatic character-erasing function - Google Patents

Abstract

The utility model discloses a blackboard with automatic character-erasing function, which comprises a fixing frame for installing a blackboard body, wherein a driving shaft and a driven shaft are rotatably installed on two side frames of the fixing frame, driving sprockets are respectively arranged at two ends of the driving shaft, driven sprockets are respectively arranged at two ends of the driven shaft, and chains are respectively arranged between the driving sprocket and the driven sprocket at the upper end and between the driving sprocket and the driven sprocket at the lower end; a sliding and rotating mechanism is arranged between the top frame and the bottom frame on the fixing frame, driving chain wheels matched with the two chains are arranged at two ends of the sliding and rotating mechanism, a wiping plate which slides along the length direction of the fixing frame and is in running fit with the sliding and rotating mechanism is arranged on the sliding and rotating mechanism, and wiping cloth is arranged on the wiping plate. The mechanical erasing of the chalk writing contents on the blackboard body is realized, the erasing efficiency is improved, the labor intensity is reduced, and a large amount of time is saved; the problems that dust flies to pollute the environment, the health is influenced and the difficulty is high when the written content on the top of the blackboard is erased are solved.

Description

Blackboard with automatic character-erasing function

Technical Field

The utility model belongs to the technical field of teaching aid, especially, relate to a blackboard with automatically, wipe word function.

Background

At present, in education and teaching, a blackboard plays a very important role, at the present stage, the blackboard is fixed on a wall, contents are written by chalk, but the following defects exist when the contents written by the chalk are erased:

1. manual erasing is needed, time and labor are wasted, erasing efficiency is low, labor intensity is high, and especially when chalk characters are erased in a classroom, teaching of teachers and learning of students in the classroom are affected;

2. the erased chalk dust can generate a lot of dust and fly around, so that the teaching environment is polluted, and the physical health of teachers and students is influenced;

3. the difficulty in erasing the written content on the top of the blackboard is high.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a blackboard with automatically, wipe word function realizes that the mechanization is wiped the content that the chalk was write and is reached the purpose that improves and wipe efficiency.

The utility model provides a technical scheme is: a blackboard with an automatic character erasing function comprises a fixed frame fixedly arranged on a wall body, wherein a blackboard body is arranged on the fixed frame, a driving shaft and a driven shaft are respectively and rotatably arranged on two frames of the fixed frame far away from one side of the wall body, the driving shaft and the driven shaft are both arranged along the height direction of the fixed frame, the driving shaft is driven by a power element, driving sprockets are arranged at two ends of the driving shaft, driven sprockets are arranged at two ends of the driven shaft, and chains are arranged between the driving sprocket and the driven sprocket at the upper end and between the driving sprocket and the driven sprocket at the lower end;

be equipped with slip rotary mechanism between top frame on the mount and the underframe, slip rotary mechanism's both ends all be equipped with two chain complex driving sprocket, be equipped with on the slip rotary mechanism and follow the gliding board of wiping of mount length direction, wipe the board with slip rotary mechanism connects the cooperation relation for the rotation, the both ends of wiping the board are followed the direction of height extension setting of blackboard body, just be equipped with on the wiping board with the wiping cloth that the face of writing on the blackboard body supported and lean on.

As an improvement, protective boxes are arranged on the frames at the two ends of the fixing frame, and the driving shaft and the driven shaft are rotatably arranged in the protective boxes; and one side of each of the two protection boxes, which is close to each other, is provided with a through hole for the chain to pass through.

As a further improvement, a protection plate is arranged between the two protection boxes and is positioned above the chain at the lower end.

As a further improvement, the sliding and rotating mechanism comprises sliding chutes arranged on the bottom frame and the top frame, the sliding chutes are arranged in a T-shaped structure and are arranged along the length direction of the bottom frame or the top frame, two sliding blocks of the T-shaped structure are respectively slidably mounted in the two sliding chutes, a connecting rod is arranged between the two sliding blocks, two ends of the connecting rod respectively penetrate through the corresponding sliding blocks, gears are respectively arranged at the end parts of the two ends of the connecting rod, racks are respectively arranged on the bottom frame and the top frame at positions corresponding to the gears, and the racks are meshed with the gears;

the two driving chain wheels are fixedly arranged on the connecting rod, and the connecting rod is rotatably arranged on the wiping plate and the sliding block.

As a further improvement, the bottom frame is provided with a powder leakage passage which runs through the thickness of the bottom frame, the bottom frame below the powder leakage passage is inserted and matched with a powder receiving box, and a powder containing cavity communicated with the powder leakage passage is arranged in the powder receiving box.

As a further improvement, two ends of the powder receiving box are provided with dovetail grooves, and the bottom frame is provided with an insertion connecting block matched with the dovetail grooves.

As a further improvement, the powder leakage channels are positioned below the sliding grooves and are communicated with each other;

the rack on the bottom frame is arranged on the side wall of the powder leakage channel, and the rack on the top frame is arranged on the side wall of the sliding groove.

Adopted the aforesaid technical scheme, the utility model provides a blackboard with automatically, wipe word function's beneficial effect as follows:

the blackboard with the automatic character erasing function comprises a fixed frame fixedly arranged on a wall body, a blackboard body is arranged on the fixed frame, a driving shaft and a driven shaft are respectively and rotatably arranged on two side frames of the fixed frame far away from one side of the wall body, the driving shaft and the driven shaft are both arranged along the height direction of the fixed frame, the driving shaft is driven by a power element, driving sprockets are arranged at two ends of the driving shaft, driven sprockets are arranged at two ends of the driven shaft, and chains are arranged between the driving sprocket and the driven sprocket at the upper end and between the driving sprocket and the driven sprocket at the lower end; based on the structure, when the blackboard with the automatic character erasing function erases the content on the writing surface, the power element drives the driving shaft to rotate, the driven shaft is driven to rotate through the meshing of the driving sprocket, the driven sprocket and the chain, in the rotating process, the chain can synchronously drive the driving sprocket and the sliding rotating mechanism to linearly slide between the top frame and the bottom frame, so as to realize the linear movement of the erasing plate rotationally matched with the sliding rotating mechanism, in the movement, erasing the chalk writing contents on the blackboard body by using an erasing cloth; when the erasing plate moves from one end of the fixing frame to the other end, the motor turns over to drive the erasing plate to return to the starting end, and the reciprocating erasing of the writing contents on the blackboard body is realized.

In conclusion, the blackboard with the automatic erasing function realizes the mechanical erasing of the chalk writing contents on the blackboard body, greatly improves the erasing efficiency, effectively reduces the labor intensity of erasing work, saves a large amount of time and ensures the teaching time of teachers and the learning time of students in class compared with the traditional manual erasing; meanwhile, the problems that dust flies around to pollute the teaching environment and affect the health of the body are effectively avoided, and the problem that the difficulty is high when the written content on the top of the blackboard is erased is also solved.

Because the frames at the two ends of the fixing frame are provided with the protective boxes, the driving shaft and the driven shaft are rotatably arranged in the protective boxes; one side that two protective housing are close to each other all is equipped with the through-hole that supplies the chain to pass to hold driving shaft or driven shaft through the protective housing that sets up on the frame, played the safety protection effect, avoided when erasing the content that the chalk was written, driving shaft and driven shaft are rotatory and take place the incident, and simultaneously, the protective housing provides rotatory support for driving shaft and driven shaft.

Because be equipped with the guard plate between two guard boxes, the guard plate is located the top of lower extreme chain to shelter from the chain that is located the below through the guard plate, played the safety protection effect equally, avoided the chain rotation and cause the incident.

The sliding and rotating mechanism comprises sliding chutes arranged on the bottom frame and the top frame, the sliding chutes are arranged in a T-shaped structure and are arranged along the length direction of the bottom frame or the top frame, sliding blocks of the T-shaped structure are respectively installed in the two sliding chutes in a sliding manner, a connecting rod is arranged between the two sliding blocks, two ends of the connecting rod respectively penetrate through the corresponding sliding blocks, gears are arranged at the end parts of the two ends of the connecting rod, racks are arranged on the bottom frame and the top frame at positions corresponding to the gears, and the racks are meshed with the gears; two drive sprocket equal fixed mounting are on the connecting rod, the connecting rod rotates and installs on wiping board and slider, thereby in operation, the chain drives drive sprocket and rotates, drive sprocket drives the connecting rod and rotates on slider and wiping board, at the rotatory in-process of connecting rod, through the meshing of wheel and rack, the straight line of board on underframe and top frame is wiped in the realization, at the in-process of this removal, through the cooperation of spout and slider, the effect that the board carries out straight line movement is wiped in the guide has been played, moreover, the steam generator is simple in structure, think about ingeniously, straight line mobility is good, the content of writing for the chalk is erased in the mechanization has established the basis.

The bottom frame is provided with the powder leaking channel which penetrates through the thickness of the bottom frame, the bottom frame below the powder leaking channel is inserted and matched with the powder receiving box, and the powder receiving box is internally provided with the powder containing cavity communicated with the powder leaking channel, so that the wiped chalk dust is intensively collected through the mutually communicated powder leaking channel and the powder receiving box, and the problem of flying dust is avoided; through the underframe and the cartridge cooperation that connects the powder box, realize connecing the detachable cooperation of powder box on the underframe, be convenient for fall the chalk dust that connects in the powder box.

Owing to connect the both ends of powder box to be equipped with the dovetail, be equipped with the cartridge connecting block that matches with the dovetail on the underframe to realize cartridge formula cooperation through dovetail and cartridge connecting block, simple structure connects the fixed effectual of powder box on the underframe.

The chalk dust leaking channel is positioned below the sliding groove and communicated with the sliding groove, so that the chalk dust can smoothly enter the chalk dust receiving box; because the rack on the underframe is arranged on the side wall of the powder leakage channel, and the rack on the top frame is arranged on the side wall of the chute, the rack is directly arranged on the side wall of the powder leakage channel and the chute side wall, so that the meshing fit of the rack and the driving gear is ensured, and the underframe and the top frame can be conveniently processed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 showing the combination of the fixing frame, the protection box and the driving shaft;

FIG. 3 is a schematic view of the chain and the sliding rotation mechanism in FIG. 1;

FIG. 4 is an enlarged view of B in FIG. 3;

FIG. 5 is a schematic view of the top frame of FIG. 2 engaged with a sliding mechanism;

fig. 6 is a schematic structural view of the bottom frame and the sliding rotation mechanism in fig. 2;

FIG. 7 is a view from the A direction of FIG. 1 with the compact attached;

fig. 8 is a schematic structural view of the powder receiving box;

in the figure, 1-a fixing frame; 101-a frame; 102-a top frame; 103-bottom frame; 1031-powder leakage channel; 1032-inserting a connecting block; 104-a protective box; 105-protective plate; 2-blackboard body; 201-writing surface; 3-driving shaft; 301-a power element; 302-a drive sprocket; 303-on-off switch; 4-a driven shaft; 401-a driven sprocket; 5-a chain; 501-through holes; 6-a sliding rotation mechanism; 601-a drive sprocket; 602-a chute; 603-a slide block; 604-a connecting rod; 605-gear; 606-a rack; 7-wiping the board; 701-wiping cloth; 8-receiving the powder box; 801-powder holding cavity; 802-dovetail groove.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 3, a blackboard with an automatic character-erasing function includes a fixing frame 1 fixedly installed on a wall, a blackboard body 2 is installed on the fixing frame 1, a driving shaft 3 and a driven shaft 4 are respectively rotatably installed on two side frames 101 of the fixing frame 1 far away from one side of the wall, the driving shaft 3 and the driven shaft 4 are both vertically arranged along the height direction of the fixing frame 1, the driving shaft 3 is driven by a power element 301, in the scheme, the power element 301 is a motor, and an on-off switch 303 for controlling the motor to start and stop is installed on one side frame 101; both ends of the driving shaft 3 are provided with driving sprockets 302, both ends of the driven shaft 4 are provided with driven sprockets 401, and chains 5 are arranged between the driving sprocket 302 and the driven sprocket 401 at the upper end and between the driving sprocket 302 and the driven sprocket 401 at the lower end; a sliding and rotating mechanism 6 is arranged between the top frame 102 and the bottom frame 103 on the fixed frame 1, both ends of the sliding and rotating mechanism 6 are provided with driving chain wheels 601 matched with the two chains 5, the sliding and rotating mechanism 6 is provided with a wiping plate 7 sliding along the length direction of the fixed frame 1, the wiping plate 7 and the sliding and rotating mechanism 6 are in a rotating connection and matching relationship, both ends of the wiping plate 7 extend along the height direction of the blackboard body 2 (that is, the length of the wiping plate 7 is equal to or slightly less than the height of the blackboard 2), and the wiping plate 7 is provided with wiping cloth 701 abutted against the writing surface 201 on the blackboard body 2.

Protective boxes 104 are respectively arranged on the frames 101 at the two ends of the fixed frame 1, and the driving shaft 3 and the driven shaft 4 are rotatably arranged in the protective boxes 104; one side of each of the two protection boxes 104 close to each other is provided with a through hole 501 for the chain 5 to pass through; a guard plate 105 is provided between the two guard boxes 104, and the guard plate 105 is positioned above the lower chain 5 (see fig. 1 and 2).

As shown in fig. 3 to 6, the sliding and rotating mechanism 6 includes sliding grooves 602 disposed on the bottom frame 103 and the top frame 102, the sliding grooves 602 are T-shaped and arranged along the length direction of the bottom frame 103 or the top frame 102, a sliding block 603 with a T-shaped structure is respectively slidably mounted in the two sliding grooves 102, a connecting rod 604 is disposed between the two sliding blocks 103, two ends of the connecting rod 604 respectively penetrate through the corresponding sliding blocks 603, and two end portions of the connecting rod 604 are both provided with a gear 605 (correspondingly, a channel for the gear 605 to move is disposed on each of the bottom frame 103 and the top frame 102), the bottom frame 103 and the top frame 102 at positions corresponding to the gear 605 are both provided with racks 606, and the racks 606 are engaged with the gear 605; the two driving sprockets 601 are both fixedly mounted on a connecting rod 604 through a key connection structure, and the connecting rod 604 is rotatably mounted on the wiping plate 7 and the sliding block 603.

As shown in fig. 6 and 7, the bottom frame 103 is provided with a powder leakage passage 1031 penetrating the thickness of the bottom frame 103, the bottom frame 103 located below the powder leakage passage 1031 is inserted and matched with a powder receiving box 8, and a powder containing cavity 801 communicated with the powder leakage passage is arranged in the powder receiving box 8; preferably, the powder leakage passages 1031 are located right below the sliding grooves 602 and are communicated with each other, the rack 606 on the bottom frame 103 is arranged on the side wall of the powder leakage passages 1031 (i.e., the passage for the movement of the gear 605 is replaced by the powder leakage passages 1031), and as shown in fig. 5, the rack 606 on the top frame 102 is arranged on the side wall of the sliding grooves 602 (i.e., the passage for the movement of the gear 605 is replaced by the sliding grooves 602).

This connect powder box 8 and underframe 103's concrete cartridge cooperation structure to be: dovetail grooves 802 are provided at both ends of the powder receiving box 8, and an insertion connection block 1032 (see fig. 7 and 8) which is fitted to the dovetail grooves 802 is provided on the bottom frame 103.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (7)

1. A blackboard with an automatic character-erasing function comprises a fixed frame fixedly arranged on a wall body, wherein a blackboard body is arranged on the fixed frame, and the blackboard is characterized in that a driving shaft and a driven shaft are respectively rotatably arranged on two frames of the fixed frame far away from one side of the wall body, the driving shaft and the driven shaft are both arranged along the height direction of the fixed frame, the driving shaft is driven by a power element, driving sprockets are arranged at two ends of the driving shaft, driven sprockets are arranged at two ends of the driven shaft, and chains are arranged between the driving sprocket and the driven sprocket at the upper end and between the driving sprocket and the driven sprocket at the lower end;

be equipped with slip rotary mechanism between top frame on the mount and the underframe, slip rotary mechanism's both ends all be equipped with two chain complex driving sprocket, be equipped with on the slip rotary mechanism and follow the gliding board of wiping of mount length direction, wipe the board with slip rotary mechanism connects the cooperation relation for the rotation, the both ends of wiping the board are followed the direction of height extension setting of blackboard body, just be equipped with on the wiping board with the wiping cloth that the face of writing on the blackboard body supported and lean on.

2. The blackboard with the function of automatically erasing characters according to claim 1, wherein the side frames at both ends of the fixing frame are provided with a protective box, and the driving shaft and the driven shaft are rotatably installed in the protective box; and one side of each of the two protection boxes, which is close to each other, is provided with a through hole for the chain to pass through.

3. The blackboard with the function of automatically erasing characters according to claim 2, wherein a protection plate is arranged between the two protection boxes, and the protection plate is positioned above the chain at the lower end.

4. The blackboard with the automatic character-erasing function according to any one of claims 1 to 3, wherein the sliding and rotating mechanism includes sliding grooves provided on the bottom frame and the top frame, the sliding grooves are provided in a T-shaped structure and are arranged along the length direction of the bottom frame or the top frame, a T-shaped slider is slidably mounted in each of the two sliding grooves, a connecting rod is provided between the two sliders, two ends of the connecting rod respectively penetrate through the corresponding sliders, and both ends of the connecting rod are provided with gears, racks are provided on the bottom frame and the top frame at positions corresponding to the gears, and the racks are engaged with the gears;

the two driving chain wheels are fixedly arranged on the connecting rod, and the connecting rod is rotatably arranged on the wiping plate and the sliding block.

5. The blackboard with the function of automatically erasing characters as claimed in claim 4, wherein the bottom frame is provided with a powder leaking channel running through the thickness of the bottom frame, a powder receiving box is inserted and fitted on the bottom frame below the powder leaking channel, and a powder containing cavity communicated with the powder leaking channel is arranged in the powder receiving box.

6. The blackboard with the function of automatically erasing characters according to claim 5, wherein dovetail grooves are arranged at two ends of the powder receiving box, and the bottom frame is provided with plug-in connection blocks matched with the dovetail grooves.

7. The blackboard with the automatic character-erasing function according to claim 6, wherein the powder leaking channels are located below the sliding grooves and communicated with each other;

the rack on the bottom frame is arranged on the side wall of the powder leakage channel, and the rack on the top frame is arranged on the side wall of the sliding groove.