CN204451765U - Dustless eraser - Google Patents

Abstract

The utility model relates to a dust-free board eraser, which comprises a shell with one side opening and a hollow inside, a connecting layer packaged at the opening of the shell, and a wiping layer fixedly connected to the connecting layer. The supporting portion for the elastic support of the connecting layer, the wiping layer is in a convex arc shape in a natural state due to the elastic supporting of the connecting layer by the supporting portion. The dust-free board eraser has the advantages of simple structure, good use effect and convenient practical application.

Description

Dust-free eraser

technical field

The utility model relates to a teaching appliance, in particular to a dust-free board eraser.

Background technique

The dust pollution produced during the use of the board eraser is extremely harmful to the health of teachers and students. At present, there are many designs for dust-free board erasers, but some have complex structures, some cannot be used repeatedly, and some have poor use effects. Therefore, there is no practical application. There is very little dust on the board.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a dust-free eraser with simple structure and good use effect.

In order to achieve the above object, the dust-free board eraser of the present utility model comprises a housing with one side opening and a hollow interior, a connecting layer packaged at the opening of the housing, and a wiping layer fixedly connected to the connecting layer. A supporting part is provided for elastically supporting the connecting layer, and the wiping layer is in a convex arc shape in a natural state due to the elastic supporting of the connecting layer by the supporting part.

The wiping layer is in a convex arc shape in a natural state. When in use, due to the pressing contact between the wiping layer and the blackboard, the arc surface is squeezed into a flat surface, and the wiped dust is stored in the wiping layer to achieve the dust-free The use effect of blackboard eraser. When the external force disappears, the elastic supporting portion supports the wiping layer to restore to an outwardly convex arc shape, and the recovery process prompts the dust in the wiping layer to be bounced off.

As a limitation to the above manner, the support part is a spring fixedly connected in the casing.

As a limitation to the above manner, the support part is an arc-shaped elastic plate that is fixedly connected in the housing and arranged in close contact with the connecting layer.

When the support part is an arc-shaped elastic plate, the connection layer and the support part are in a close-fitting structural state. During use, the connection layer will change correspondingly with the unevenness of the support part.

As a limitation to the above manner, the wiping layer is composed of wiping strips arranged at intervals.

The wiping layer is set as a wiping strip structure spaced apart from each other, and the gap between the wiping strips can better accommodate dust. Big and small, forming an alternate state of occlusal and open, so that the wiped dust can be stably accommodated in the gap.

As a limitation to the above method, the connection layer between adjacent wiper strips and the arc-shaped elastic plate are respectively provided with dust leakage holes connecting the inner cavity of the housing with the outside world, and the bottom of the housing can be opened.

The dust leakage hole connecting the inner cavity of the housing with the outside world is arranged to help enhance the dust suction effect of the blackboard eraser. When in use, under the extruding action of external force on the wiping layer, the inner cavity space of the housing is reduced, and the internal air is squeezed out through the dust leakage hole; after wiping, the external force disappears, the elastic support part returns to its natural state, and the inner cavity space of the housing Larger, while absorbing the outside air, the dust stored in the gap of the wiper strip is absorbed and gathered in the housing, which better enhances the dust collection effect of the eraser. After a period of use, the housing is opened to clean the dust.

As a limitation to the above manner, the cross-sectional shape of the dust leakage hole is funnel-shaped from the connecting layer to the arc-shaped elastic plate.

The dust leakage hole is funnel-shaped in the natural state, which prevents the dust leakage hole from being closed due to the extrusion of the wiping layer during use, which is beneficial to the absorption of dust.

As a limitation to the above manner, the wiping strip is composed of a neck connected to the connecting layer and a head fixedly connected to the neck.

To sum up, the dust-free board eraser obtained by adopting the technical solution of the utility model utilizes the structural arrangement of the wiping layer and the elastic support device to accommodate dust. It has a simple structure, good use effect, and is convenient for practical application.

Description of drawings

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

Fig. 1 is the structure diagram of the dust-free blackboard eraser of the utility model embodiment one;

Fig. 2 is the A-A line sectional view of Fig. 1;

Fig. 3 is a schematic structural diagram of a dust-free eraser according to Embodiment 2 of the utility model;

In the figure: 1. shell; 2. connecting layer; 3. elastic plate; 4. wiping layer; 5. wiping strip; 6. head of wiping strip; 7. neck of wiping strip; 8. dust leakage hole; 9. Spring.

Detailed ways

Embodiment one

This embodiment relates to a dust-free eraser, as shown in Figure 1 and Figure 2, it includes a housing 1 with one side opening and a hollow interior, the bottom of the housing 1 can be opened; a connecting layer is packaged at the opening of the housing 2. The connection layer 2 is made of a layer of tough flannelette material; the housing 1 is also provided with an elastic plate 3 that is convex and arc-shaped in a natural state to elastically support the connection layer, and the elastic plate 3 and the connection layer 2 Accompanied by close contact, the two-layer structure is closely attached, and the connecting layer 2 changes correspondingly with the unevenness of the elastic plate 3; a wiping layer 4 is fixed on the connecting layer 2, and the wiping layer 4 is composed of wiping strips 5 spaced apart from each other. Wiping bar 5 is the structural form that is connected with the neck 7 on the connecting layer 2 and the head 6 that is fixedly connected on the neck, and the width of the head is greater than the neck, so that the space for containing dust between adjacent wiping bars is The reduced state of the opening is conducive to the stable storage of dust. The connecting layer between adjacent wiper strips and the arc-shaped elastic plate are provided with a dust leakage hole 8 that connects the inner cavity of the housing with the outside world. The dust leakage hole 8 is funnel-shaped.

When the dust-free board eraser is in use, the wiping layer is in contact with the blackboard, and under the joint action of the elastic plate 3 and the unstable wiping external force, the gap between the wiping strips 5 becomes larger and smaller during the wiping process, forming an alternating The changed state of occlusal and open, so that the wiped dust is stably stored in the gap, and the use effect of the dust-free eraser is realized. At the same time, the suction generated by the change of the inner cavity space of the housing 1 will be stored in the gap The dust is absorbed into the casing 1, so as to achieve a better storage effect on the dust. When the external force disappears, the elastic plate 3 returns to a convex arc shape, and the recovery process prompts the dust between the wiping strips to be bounced off. After a period of use, the bottom of the housing 1 is opened to clean up the dust accumulated in the housing 1 .

In addition, the neck and the head of the wiping strip 5 may have shapes having the same width other than the above-mentioned shapes.

Embodiment two

This embodiment relates to a dust-free eraser. As shown in FIG. The number of springs 9 connected in the housing 1 can be set corresponding to the number of wiping strips 5 , and the setting position of each spring 9 is corresponding to each wiping strip 5 .

Claims (7)

1. a Dustless eraser, comprise a side opening and the housing of inner hollow, be packaged in the articulamentum at shell nozzle place, and the cleaning layer be fixed on articulamentum, it is characterized in that: in housing, be provided with the support portion of articulamentum being carried out to resiliency supported, described cleaning layer, because support portion is to the resiliency supported of articulamentum, is the arc of evagination under nature.

2. Dustless eraser according to claim 1, is characterized in that: described support portion is the spring be connected in housing.

3. Dustless eraser according to claim 1, is characterized in that: described support portion is be connected in housing and accompany the arc elastic plate reclining and arrange with articulamentum.

4. Dustless eraser according to claim 3, is characterized in that: described cleaning layer is made up of the wiper rail of spaced setting.

5. Dustless eraser according to claim 4, is characterized in that: the articulamentum between adjacent wiper rail and arc elastic plate are respectively equipped with the dust-leaking hole that housing cavity is connected with the external world, and described housing bottom is openable.

6. Dustless eraser according to claim 5, is characterized in that: the cross sectional shape of described dust-leaking hole is the funnel-form arranged to arc elastic plate direction by articulamentum.

7. the Dustless eraser according to any one of claim 4 ~ 6, is characterized in that: described wiper rail, by the neck be connected on articulamentum, is connected in the head composition on neck.