CN204432172U - Multifunctional blackboard eraser - Google Patents

Abstract

The utility model relates to a multifunctional blackboard eraser, which comprises a blackboard, two protrusions are arranged symmetrically at both ends of the upper side of the blackboard, a rotating shaft is arranged between the two protrusions, a sleeve is arranged inside the rotating shaft, and a torsion spring is set on the sleeve. One end of the torsion spring is connected to the bump on one side, the other end of the torsion spring is connected to the inner surface of the rotating shaft, the outer surface of the rotating shaft is rolled with a curtain, the outer end of the curtain is connected to the housing, the inner side of the housing is detachably connected to the bristle plate, the outer side of the housing is equipped with a handle, and the lower end of the housing is connected The support frame is detachably connected to the ash storage box, and the ash storage box and the bristle board are on the same straight line. The utility model solves the problems of unclean blackboard eraser, slow wiping speed, laborious wiping and generation of dust in the wiping process. The dust is harmful to the health of teachers and students.

Description

multifunctional blackboard eraser

technical field

The utility model relates to a blackboard eraser, in particular to a multifunctional blackboard eraser.

Background technique

Blackboard eraser is an indispensable item in school classrooms and training institutions. It is mostly square, mainly composed of bristles and shell, and is small in size. It can wipe the handwriting written by the teacher on the blackboard. It is very convenient to erase and put away. It is a must for teachers in class. equipment.

Most of the blackboards in schools are erased with blackboard erasers. The "chalk dust syndrome" caused by erasing blackboards has become the number one health hazard for teachers and students. It takes at least 16 years for a student from elementary school to college, which is the golden period of growth and development, but he is constantly harmed by chalk dust; a teacher usually takes about 40 years from standing on the podium to retiring, You have to "eat chalk dust" for most of your life.

At the same time, wiping the blackboard during class also wastes the effective class time of teachers and students. When the curriculum is relatively tense, teachers often do not have much time to wipe the blackboard. However, the existing blackboard erasers are time-consuming, laborious, inefficient and not very good. It is necessary to wipe the blackboard clean, and it will produce a lot of dust, which will pollute the air in the classroom and cause adverse effects on the health of teachers and students in the front row. Most of the chalk dust will accumulate in the small groove under the blackboard or fall to the ground. When someone walks or the wind blows, it will float in the air again, causing secondary pollution to the indoor environment.

And now the blackboard erasers in schools all have the above-mentioned problems, so it has become a demand of the school to invent a blackboard eraser that can wipe off the words written on the blackboard, with fast wiping speed, labor saving, and dust that will not spread to the classroom.

Utility model content

The purpose of the utility model invention is to provide a multifunctional blackboard eraser, which solves the problems that the blackboard eraser is not clean, the wiping speed is slow, the wiping is laborious, and the dust generated during the wiping process endangers the health of teachers and students.

In order to achieve the purpose of the above invention, the multifunctional blackboard eraser of the present utility model includes a blackboard, two convex blocks are symmetrically arranged at both ends of the upper side of the blackboard, a rotating shaft is arranged between the two convex blocks, a sleeve is arranged inside the rotating shaft, and a twist One end of the torsion spring is connected to the bump on one side, the other end of the torsion spring is connected to the inner surface of the rotating shaft, the outer surface of the rotating shaft is rolled with a curtain, the outer end of the curtain is connected to the shell, the inner side of the shell is detachably connected to the bristle plate, and the outer side of the shell is equipped with a handle. The lower end is connected with the support frame, and the ash storage box is detachably connected with the support frame, and the ash storage box and the bristle plate are on the same straight line.

The shell is connected with the bristle plate through a button.

The shell is connected with the slot of the bristle board.

The bristles on the bristle plate are gradually thinned from top to bottom.

The ash storage box is connected with the support bracket slot.

The cross section of the ash storage box is trapezoidal.

The use of this multi-functional blackboard eraser has the following advantages: 1. Good wiping effect and fast wiping speed; 2. It is less labor-saving to wipe and can automatically shrink; 3. Dust can be collected during the wiping process, avoiding dust in the air The rebroadcasting of the video will endanger the health of teachers and students. Because the sleeve is set inside the rotating shaft, the sleeve is covered with a torsion spring, one end of the torsion spring is connected with the protrusion on one side, the other end of the torsion spring is connected with the inner surface of the rotating shaft, and the outer surface of the rotating shaft is wrapped with a curtain, so that when the curtain is pulled to rotate, the rotating shaft is driven Rotating, the rotating shaft drives the torsion spring to deform, causing the torsion spring to generate torsion, so that the curtain can achieve the effect of automatic shrinkage. Since the shell and the bristle board are detachably connected, when the bristle board is damaged, the bristle board can be easily replaced; because the bristle board The bristles are gradually thinned from top to bottom, and the cross-section of the ash storage box is trapezoidal, so that the dust is easier to fall into the ash storage box; since the ash storage box is detachably connected with the support frame, when the ash storage box is full, it can be It is convenient to clean the dust in the dust storage box.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a structural diagram of the utility model multifunctional blackboard eraser.

Fig. 2 is a sectional view of the multifunctional blackboard eraser of the present invention.

Among them: 1. blackboard; 2. curtain; 3. torsion spring; 4. shaft; 5. bristle board; 6. shell; 7. handle; 8. support frame; Ash box.

Detailed ways

The multifunctional blackboard eraser shown in Fig. 1 and Fig. 2 comprises a blackboard 1, two convex blocks 9 are arranged symmetrically at both ends of the upper side of the blackboard 1, a rotating shaft 4 is arranged between the two convex blocks 9, and a sleeve 10 is arranged in the rotating shaft 4, and A torsion spring 3 is sheathed on the barrel 10, one end of the torsion spring 3 is connected to the protrusion 9 on one side, the other end of the torsion spring 3 is connected to the inner surface of the rotating shaft 4, the outer surface of the rotating shaft 4 is wrapped with a curtain 2, and the outer end of the curtain 2 is connected to the shell 6, The inside of the casing 6 is detachably connected to the bristle plate 5, the outside of the casing 6 is provided with a handle 7, the lower end of the casing 6 is connected to the support frame 8, and the support frame 8 is detachably connected to the ash storage box 11, and the ash storage box 11 and the bristle plate 5 are in the same in a straight line.

The shell 6 is connected with the bristle plate 5 through buttons.

The housing 6 is connected with the bristle plate 5 through the slot.

The bristles on the bristle plate 5 are gradually sparse from top to bottom.

The ash storage box 11 is connected with the supporting frame 8 through a slot.

The cross section of the ash storage box 11 is trapezoidal.

Because the sleeve 10 is set inside the rotating shaft 4, the sleeve 10 is covered with a torsion spring 3, one end of the torsion spring 3 is connected with the protrusion 9 on one side, the other end of the torsion spring 3 is connected with the inner surface of the rotating shaft 4, and the outer surface of the rotating shaft 4 is wrapped with a curtain 2. In this way, when the handle 7 is pulled, the handle 7 drives the curtain 2 to extend, and when the curtain 2 extends, it drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the torsion spring 3 to deform, so that the torsion spring 3 generates torque. After the handle 7 is released, the torsion spring 3 Automatic recovery, so that the curtain 2 is automatically rolled on the rotating shaft 4 so that the curtain 4 can achieve the effect of automatic shrinkage. Since the shell 6 is detachably connected with the bristle plate 5, when the bristle plate 5 is damaged, the bristle plate 5 can be easily replaced; The bristles on the bristle plate 5 are gradually sparse from top to bottom, and the cross-section of the ash storage box 11 is trapezoidal, so that the dust falls into the ash storage box 11 more easily; When the ash storage box 11 was full, the dust in the ash storage box 11 could be cleaned up easily.

The technical features not described in detail in this application belong to the prior art. The above-mentioned embodiments are only illustrative to illustrate the principles and effects of the present application, but are not intended to limit the present application. Any person familiar with the technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in this application should still be covered by the claims of this application.

Claims (6)

1. a multifunctional blackboard eraser, it is characterized in that: comprise blackboard (1), two ends, blackboard (1) upside are symmetrical arranged two projections (9), between two projections (9), rotating shaft (4) is set, sleeve (10) is set in rotating shaft (4), the upper cover of sleeve (10) has torsion spring (3), torsion spring (3) one end is connected with side projection (9), torsion spring (3) other end is connected with rotating shaft (4) inner surface, rotating shaft (4) outer surface volume has curtain (2), curtain (2) lateral ends connected with outer casing (6), removably connect inside shell (6) hair brushing plate (5), shell (6) outside is provided with handle (7), shell (6) lower end connects bracing frame (8), bracing frame (8) removably connects stored ash box (11), described stored ash box (11) and hair brushing plate (5) are on the same line.

2. according to multifunctional blackboard eraser according to claim 1, it is characterized in that: described shell (6) is connected by button with hair brushing plate (5).

3. according to multifunctional blackboard eraser according to claim 1, it is characterized in that: described shell (6) is connected with hair brushing plate (5) draw-in groove.

4. according to multifunctional blackboard eraser according to claim 1, it is characterized in that: the bristle on described hair brushing plate (5) is sparse gradually from top to bottom.

5. according to multifunctional blackboard eraser according to claim 1, it is characterized in that: described stored ash box (11) is connected with bracing frame (8) draw-in groove.

6. according to multifunctional blackboard eraser according to claim 1, it is characterized in that: the cross section of described stored ash box (11) is trapezoidal.