CN115570908A

CN115570908A - Blackboard eraser

Info

Publication number: CN115570908A
Application number: CN202211394142.1A
Authority: CN
Inventors: 王小净
Original assignee: Individual
Current assignee: Shandong Jianlu Science and Education Equipment Co.,Ltd.
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-01-06
Anticipated expiration: 2042-11-08
Also published as: CN115570908B

Abstract

The invention belongs to the technical field of blackboard erasers, and particularly relates to a blackboard eraser which comprises a shell assembly, wherein a wiping assembly is mounted on the inner side of the bottom of the shell assembly, and a rotation control assembly is arranged on the outer side of the wiping assembly and inside the shell assembly. When a user presses and pushes the blackboard eraser, the rubber wheel can be in contact with the blackboard, when the blackboard eraser is pushed, the rubber wheel can drive the third conical teeth and the mounting rod to rotate, at the moment, under the action of the second conical teeth, the central shaft can be controlled to drive the brush roller to rotate in the direction opposite to the moving direction, and as the diameter of the third conical teeth is larger than that of the second conical teeth, the relative speed of the brush roller and the blackboard is high, the cleaning effect is good, the blackboard can be cleaned more fully, chalk dust can be shielded through the soft shielding part, the chalk dust can be adhered and restrained through the water absorption dust suppression roller which adsorbs water, and the environment and the body health are protected conveniently.

Description

Blackboard eraser

Technical Field

The invention belongs to the technical field of blackboard erasers, and particularly relates to a blackboard eraser.

Background

The blackboard eraser is a common blackboard cleaning tool, is one of indispensable important tools in classroom classrooms, and in the course of giving lessons by teachers or in the gap between two classes, the blackboard eraser is required to be used for erasing blackboard writing fully written on the blackboard so as to facilitate the continuous use of the blackboard.

For example, chinese patent publication No. CN215621078U proposes a blackboard eraser, which aims to solve the problem that chalk powder flies around, and easily enters the respiratory tract of nearby people, thereby affecting the health of the people, but the above comparison problem still has the following problems: when the blackboard eraser is used for erasing blackboard writing written by chalk on a blackboard, the blackboard writing is erased while water is sprayed for wetting, the condition that the blackboard writing is not completely erased and stains are easily left after water is dried is easily caused, and only a fixed-direction erasing mode can be provided, so that the using requirements under different environments cannot be met. Therefore, there is an urgent need to improve the existing blackboard eraser and provide a blackboard eraser.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a blackboard eraser which is reasonable in design, simple in structure, sufficient in blackboard writing erasing and capable of providing multiple erasing directions, and aims to solve the problems that when blackboard writings written by chalk on a blackboard are erased by using the blackboard eraser, the blackboard writings are easy to be erased incompletely by spraying water and wet at the same time, stains are easy to remain after water is dried, and the use requirements in different environments cannot be met due to the fact that only a fixed-direction erasing mode can be provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a blackboard eraser comprises an outer shell assembly, a wiping assembly is mounted on the inner side of the bottom of the outer shell assembly, a rotary control assembly is arranged on the outer side of the wiping assembly and located inside the outer shell assembly, and a reversing control mechanism playing a role in positioning is mounted right behind the rotary control assembly.

As a preferred embodiment, shell subassembly includes casing, soft shielding part and the dirt roller that suppresses that absorbs water, soft shielding part pastes to be connected on the bottom outer wall of casing, and the front end of casing rotates and is connected with the dirt roller that suppresses that absorbs water, "concave" font constant head tank has been seted up at the rear end middle part of casing.

As a preferred embodiment, the wiping component comprises a brush roller, two central shafts, a fixing support, a gear, first conical teeth and second conical teeth, the two central shafts are fixedly installed at the circle centers of the left end and the right end of the brush roller respectively, the fixing support is rotatably connected to the outer side of the middle of each central shaft, the gear is fixedly installed at one end, away from the brush roller, of each central shaft, the first conical teeth are arranged above the front portion of the gear, and the second conical teeth are arranged at the left end of the brush roller.

In a preferred embodiment, one end of the fixing bracket, which is far away from the central shaft, is fixedly connected to the inner wall of the housing assembly, the gear is engaged with the first tapered teeth, and the first tapered teeth are rotatably connected to the fixing bracket.

As a preferred embodiment, the rotation control subassembly includes sliding seat, guide bar, installation pole, third taper tooth and rubber tyer, the inside sliding connection in rear end of sliding seat has two the guide bar, two the guide bar sets up along the direction of height of shell subassembly, and the inside rotation in front end of sliding seat is connected with the installation pole, two third taper tooth is fixed mounting in both ends about the installation pole respectively, and one side that the installation pole was kept away from to the third taper tooth is located to the rubber tyer.

In a preferred embodiment, the guide rod is fixedly connected to the housing assembly, and the distance between the two third tapered teeth is greater than the distance between the first tapered tooth and the second tapered tooth.

As a preferred embodiment, the reversing control mechanism comprises a limiting rod, a supporting spring, a movable block and a fixed column, wherein the supporting spring is installed on the periphery of the bottom of the limiting rod, the upper end of the supporting spring is connected with the movable block, and the fixed column is fixedly installed at the rear end of the movable block.

As a preferred embodiment, the limiting rod is fixedly installed at the rear of the middle part of the rotation control assembly, the movable block is connected to the outer side of the limiting rod in a sliding manner, and one end of the fixed column, which is far away from the movable block, extends into a concave positioning groove formed in the shell.

Compared with the prior art, the invention has the beneficial effects that:

in the scheme of the invention:

when a user presses and pushes the blackboard eraser, the rubber wheel can be in contact with a blackboard, when the blackboard eraser is pushed, the rubber wheel can drive the third conical teeth and the mounting rod to rotate, at the moment, under the action of the second conical teeth, the central shaft can be controlled to drive the brush roller to rotate in the direction opposite to the moving direction, and as the diameter of the third conical teeth is larger than that of the second conical teeth, the relative speed of the brush roller and the blackboard is high, the cleaning effect is good, the blackboard can be cleaned more fully, chalk dust can be shielded through the soft shielding part, the chalk dust can be adhered and restrained through the water absorption dust suppression roller with absorbed moisture, and the environment and the body health are protected conveniently;

when the blackboard has fewer blackboard writings, the fixed column can be manually extruded to drive the movable block to move downwards, when the fixed column moves to the bottom of the positioning groove in the rear end of the shell, the fixed column can be pushed to drive the whole rotation control assembly to move rightwards, the first conical teeth are meshed with the third conical teeth on the right side, then the first conical teeth can be controlled to rotate, the brush roller can be driven to rotate in the same direction as the moving direction through the gear meshed with the first conical teeth, and the rotating speed of the brush roller is greater than the relative moving speed of the blackboard eraser and the blackboard due to the fact that the diameter of the third conical teeth is greater than the diameter of the first conical teeth, so that a certain cleaning effect can be achieved at the moment.

Drawings

In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and the following description will be made with reference to the drawings:

FIG. 1 is a schematic bottom view of the present invention;

FIG. 2 is a schematic perspective rear view cross-sectional structure of the present invention;

FIG. 3 is a rear view of the housing assembly of the present invention;

FIG. 4 is a schematic elevational view of a wiping assembly of the present invention;

FIG. 5 is a front view of the rotating control assembly of the present invention;

FIG. 6 is a rear view of the reversing control mechanism of the present invention;

FIG. 7 is a left side view of the gear and the first tapered teeth of the present invention.

In the figure:

1. a housing assembly; 11. a housing; 12. a soft shielding part; 13. a water-absorbing dust suppression roller; 2. a wiping component; 21. a brush roller; 22. a central shaft; 23. fixing a bracket; 24. a gear; 25. a first tapered tooth; 26. second tapered teeth; 3. a rotation control assembly; 31. a movable seat; 32. a guide bar; 33. mounting a rod; 34. a third tapered tooth; 35. a rubber wheel; 4. a reversing control mechanism; 41. a limiting rod; 42. a support spring; 43. a movable block; 44. and (5) fixing the column.

Detailed Description

The embodiments described below are only a part of the embodiments of the present invention, and do not represent all embodiments consistent with the present invention. Exemplary embodiments will now be described with reference to the accompanying drawings, in which:

as shown in one of fig. 1 to 7, the blackboard eraser comprises a housing assembly 1, a wiping assembly 2 is mounted on the inner side of the bottom of the housing assembly 1, blackboard writing on a blackboard can be conveniently erased by the arrangement of the wiping assembly 2, a rotation control assembly 3 is arranged on the outer side of the wiping assembly 2 and inside the housing assembly 1, the rotation direction of the wiping assembly 2 can be adjusted and changed under the action of the rotation control assembly 3, a reversing control mechanism 4 for positioning is mounted right behind the rotation control assembly 3, and the position of the rotation control assembly 3 can be limited by the arrangement of the reversing control mechanism 4.

As preferred embodiment, on the basis of above-mentioned structure, furtherly, shell subassembly 1 includes casing 11, soft shielding part 12 and the dirt roller 13 that suppresses that absorbs water, soft shielding part 12 pastes and connects on the bottom outer wall of casing 11, the front end of casing 11 rotates and is connected with the dirt roller 13 that suppresses that absorbs water, "concave" font constant head tank has been seted up at the rear end middle part of casing 11, through the setting of soft shielding part 12, can shelter from the chalk dust, avoid appearing the raise dust, and under the effect of the dirt roller 13 that suppresses that absorbs water, can carry out moist wiping to the blackboard, make the blackboard cleaner.

In a preferred embodiment, on the basis of the above structure, the wiping assembly 2 further includes a brush roller 21, a central shaft 22, a fixing bracket 23, a gear 24, first tapered teeth 25 and second tapered teeth 26, the two central shafts 22 are respectively fixedly installed at the centers of circles of the left and right ends of the brush roller 21, the fixing bracket 23 is rotatably connected to the outer side of the middle portion of the central shaft 22, the gear 24 is fixedly installed at one end of the central shaft 22 away from the brush roller 21, the first tapered teeth 25 are arranged above the front portion of the gear 24, the second tapered teeth 26 are arranged at the left end of the brush roller 21, the blackboard can be wiped by controlling the rotation of the brush roller 21, and the brush roller 21 has two different rotation states in different directions, so that the use requirements under different environments can be met.

In a preferred embodiment, on the basis of the above structure, further, one end of the fixing bracket 23 far away from the central shaft 22 is fixedly connected to the inner wall of the housing assembly 1, the gear 24 is engaged with the first tapered teeth 25, the first tapered teeth 25 are rotatably connected to the fixing bracket 23, and the brush roller 21 is conveniently installed under the setting action of the fixing bracket 23.

In a preferred embodiment, in addition to the above structure, the rotation control assembly 3 further includes a movable seat 31, two guide rods 32, a mounting rod 33, third tapered teeth 34, and a rubber wheel 35, two guide rods 32 are slidably connected inside a rear end of the movable seat 31, the two guide rods 32 are disposed along a height direction of the housing assembly 1, the mounting rod 33 is rotatably connected inside a front end of the movable seat 31, the two third tapered teeth 34 are fixedly mounted at left and right ends of the mounting rod 33, respectively, the rubber wheel 35 is disposed on a side of the third tapered teeth 34 away from the mounting rod 33, and the brush roller 21 can be controlled to automatically rotate when the blackboard eraser is pushed to move by the rubber wheel 35.

In a preferred embodiment, based on the above structure, further, the guide rod 32 is fixedly connected with the housing assembly 1, the distance between the two third tapered teeth 34 is greater than the distance between the first tapered teeth 25 and the second tapered teeth 26, and the stability of the sliding adjustment of the movable seat 31 in the left and right directions is facilitated by the arrangement of the guide rod 32.

In addition to the above configuration, the reversing control mechanism 4 preferably includes a stopper rod 41, a support spring 42, a movable block 43, and a fixed column 44, the support spring 42 is attached to the bottom periphery of the stopper rod 41, the movable block 43 is connected to the upper end of the support spring 42, the fixed column 44 is fixedly attached to the rear end of the movable block 43, and the position state of the rotation control unit 3 can be positioned by controlling the movable block 43 and engaging the fixed column 44 with the housing unit 1.

In a preferred embodiment, in addition to the above structure, the limiting rod 41 is fixedly installed at the rear of the middle portion of the rotation control assembly 3, the movable block 43 is slidably connected to the outer side of the limiting rod 41, and one end of the fixed column 44 away from the movable block 43 extends into a concave positioning groove formed in the housing 11, so that the lifting and sliding stability of the movable block 43 can be improved under the action of the limiting rod 41.

The working principle of the invention is as follows:

when the blackboard eraser is used for erasing a blackboard, firstly, the water absorption dust suppression roller 13 absorbs water when the blackboard eraser is used for erasing the blackboard, then, the blackboard eraser is manually extruded along the erasing direction when the blackboard eraser is used, the rubber wheel 35 is attached to the surface of the blackboard, the brush roller 21 is tightly attached to the blackboard under extrusion, the blackboard eraser is pushed to start erasing, the rubber wheel 35 drives the third conical teeth 34 and the mounting rod 33 to stably rotate in the process of pushing the blackboard eraser, the third conical teeth 34 are meshed with the second conical teeth 26, therefore, the brush roller 21 can be driven to rotate in the direction opposite to the moving direction of the blackboard eraser through the second conical teeth 26, as the diameter of the third conical teeth 34 is larger than that of the second conical teeth 26, the relative speed of the brush roller 21 and the blackboard is high, the cleaning effect is good, the blackboard can be cleaned more fully, the soft shielding part 12 can limit chalk dust in the enclosed blackboard, the water absorption dust suppression roller 13 with water can be used for inhibiting dust of the blackboard, the dust of a classroom and protecting the body, and preventing dust from attaching to the dust of the blackboard and protecting the body;

when the blackboard is less in blackboard writing needing to be erased, the fixed column 44 can be manually squeezed to drive the movable block 43 to stably move downwards on the outer side of the limiting rod 41, when the fixed column 44 moves to the bottom of the concave positioning groove in the shell 11, the fixed column 44 can be pulled to drive the whole rotation control assembly 3 to move rightwards, at the moment, the third conical tooth 34 on the left side is separated from the second conical tooth 26, the third conical tooth 34 on the right side is meshed with the first conical tooth 25, at the moment, when the blackboard eraser is pushed to erase the blackboard writing, the third conical tooth 34 can drive the gear 24 and the brush roller 21 to rotate in the same direction as the moving direction through the first conical tooth 25, because the diameter of the third conical tooth 34 is larger than the diameter of the first conical tooth 25, the rotating speed of the brush roller 21 is larger than the relative moving speed of the blackboard eraser and the blackboard eraser, at the moment, a certain cleaning effect can still be achieved, and because of the same-direction movement, a user can use more conveniently.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; equivalent changes, modifications, substitutions and alterations will occur to those skilled in the art based upon a study of the present disclosure and through a study of logic and reasoning, or through limited experimentation, are intended to be within the scope of protection defined by the following claims.

Claims

1. A blackboard eraser comprising a housing assembly (1), characterized in that: the utility model discloses a cleaning assembly, including shell subassembly (1), the bottom inboard of shell subassembly (1) is installed and is cleaned subassembly (2), cleans the outside of subassembly (2) and is located shell subassembly (1) inside and is provided with rotation control subassembly (3), and reversing control mechanism (4) that play the positioning action are installed to rotation control subassembly (3) just the rear.

2. The blackboard eraser according to claim 1, wherein: shell subassembly (1) includes casing (11), soft shielding part (12) and inhales water and presses down dirt roller (13), soft shielding part (12) are pasted and are connected on the bottom outer wall of casing (11), and the front end of casing (11) rotates and is connected with and inhales water and presses down dirt roller (13), the rear end middle part of casing (11) has been seted up "concave" font constant head tank.

3. A blackboard eraser according to claim 1, characterized in that: wiping component (2) includes brush roller (21), center pin (22), fixed bolster (23), gear (24), first tapered tooth (25) and second tapered tooth (26), two center pin (22) fixed mounting is in both ends centre of a circle department about brush roller (21) respectively, and the middle part outside of center pin (22) rotates and is connected with fixed bolster (23), and the one end fixed mounting that center pin (22) deviates from brush roller (21) has gear (24), and the front upper place of gear (24) is provided with first tapered tooth (25), and second tapered tooth (26) set up the left end at brush roller (21).

4. A blackboard eraser according to claim 3, characterized in that: one end, far away from the central shaft (22), of the fixed support (23) is fixedly connected to the inner wall of the shell component (1), the gear (24) is meshed with the first conical teeth (25), and the first conical teeth (25) are rotatably connected to the fixed support (23).

5. A blackboard eraser according to claim 1, characterized in that: rotation control subassembly (3) are including sliding seat (31), guide bar (32), installation pole (33), third taper tooth (34) and rubber tyer (35), the inside sliding connection in rear end of sliding seat (31) has two guide bar (32), two the direction of height setting along shell subassembly (1) is followed in guide bar (32), and the front end internal rotation of sliding seat (31) is connected with installation pole (33), two third taper tooth (34) is fixed mounting in both ends about installation pole (33) respectively, and one side of installing pole (33) is kept away from in third taper tooth (34) is located in rubber tyer (35).

6. The blackboard eraser according to claim 5, characterized in that: the guide rod (32) is fixedly connected with the shell component (1), and the distance between the two third conical teeth (34) is larger than the distance between the first conical teeth (25) and the second conical teeth (26).

7. The blackboard eraser according to claim 1, wherein: reversing control mechanism (4) include gag lever post (41), supporting spring (42), movable block (43) and fixed column (44), supporting spring (42) are installed to the bottom week side of gag lever post (41), and the upper end of supporting spring (42) is connected with movable block (43), and the rear end fixed mounting of movable block (43) has fixed column (44).

8. The blackboard eraser according to claim 7, characterized in that: the limiting rod (41) is fixedly installed at the rear of the middle of the rotary control component (3), the movable block (43) is connected to the outer side of the limiting rod (41) in a sliding mode, and one end, far away from the movable block (43), of the fixed column (44) extends into a concave positioning groove formed in the shell (11).

9. The blackboard eraser according to claim 7, wherein: the rubber wheel (35) can drive the third conical teeth (34) and the mounting rod (33) to stably rotate, at the moment, the third conical teeth (34) are meshed with the second conical teeth (26), and the brush roller (21) can be driven to rotate in the direction opposite to the moving direction of the blackboard eraser through the second conical teeth (26).

10. The blackboard eraser according to claim 7, characterized in that: the fixing column (44) is manually extruded to move downwards and rightwards, the whole rotation control assembly (3) is driven to move rightwards, the third conical tooth (34) on the left side is separated from the second conical tooth (26), the third conical tooth (34) on the right side is meshed with the first conical tooth (25), and at the moment, when the blackboard eraser is pushed to erase blackboard books, the third conical tooth (34) can drive the gear (24) and the brush roller (21) to rotate in the same direction as the moving direction through the first conical tooth (25).