CN201538169U

CN201538169U - Blackboard eraser

Info

Publication number: CN201538169U
Application number: CN2009201658766U
Authority: CN
Inventors: 李翔鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-06
Filing date: 2009-07-06
Publication date: 2010-08-04
Anticipated expiration: 2019-07-06

Abstract

The utility model provides a blackboard eraser, which comprises a blackboard eraser body. A plurality of bunches of bristles are installed on one surface of the blackboard eraser body; the blackboard eraser body further comprises a casing body with a cavity; a plurality of holes communicated with the cavity are arranged on the surface; and the cavity of the casing body is also communicated with a sucking-off device. According to the blackboard eraser, as the cavity is arranged inside the casing body of the blackboard eraser body, and negative pressure can be formed by the cavity through the sucking-off device, when handwritings formed by chalks on a blackboard are wiped by the blackboard eraser, dust produced at the friction position of the bristles of the blackboard eraser with the blackboard eraser are mostly sucked into the cavity of the casing body through the plurality of holes communicated with the cavity, thereby the dust can be prevented from spreading into the space of a classroom, and the purpose of removing the dust is realized.

Description

A kind of blackboard eraser

Technical field

The utility model relates to a kind of blackboard eraser, more particularly, relates to a kind of blackboard wiping that is used for to remove the blackboard eraser of the writing of writing with chalk on the blackboard.

Background technology

Blackboard is a teaching equipment commonly used in the classroom.Usually, when imparting knowledge to students, the teacher writes on blackboard with chalk, to transmit information to the student.

During the writing on removing blackboard, write, need carry out wiping to blackboard with blackboard eraser, in wiping process by chalk, the powder that forms writing can disperse and come, produce a lot of dust, be diffused into rapidly in the space in classroom, have a strong impact on the healthy of Faculty and Students in the classroom.

In order to overcome the problem of dust, developed the various blackboards that do not use chalk, but this blackboard and with this blackboard be used the pen cost too high, be unsuitable for promoting the use of in vast rural area.

Thereby, at the blackboard of traditional use chalk, need provide a kind of solution that can eliminate dust.

The utility model content

The purpose of this utility model is that the blackboard that overcomes traditional use chalk is easy to generate the defective of dust, and a kind of blackboard eraser that can eliminate dust at the blackboard that uses chalk is provided.

According to the utility model, a kind of blackboard eraser is provided, this blackboard eraser comprises the blackboard eraser main body, on the surface of this blackboard eraser main body many bunches of bristles are installed, wherein, described blackboard eraser main body also comprises the housing with cavity, also is provided with a plurality of holes that communicate with described cavity on the described surface, and the cavity of described housing also is communicated with aspirator.

According to blackboard eraser provided by the utility model, owing to have cavity in the housing of blackboard eraser main body and this cavity can form negative pressure by aspirator, thereby, during the writing that forms by chalk on this blackboard eraser blackboard wiping, the bristle of blackboard eraser mostly sucks in the cavity of housing via a plurality of holes that communicate with cavity with the dust that blackboard friction place produces, thereby prevent that dust is diffused in the space in classroom, play the purpose of eliminating dust.

Description of drawings

Fig. 1 is the schematic perspective view according to the blackboard eraser of a kind of embodiment of the utility model;

Fig. 2 is in the blackboard eraser according to another kind of embodiment of the present utility model, and the schematic diagram of the framework of fan is installed.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in detail.

As shown in Figure 1, the utility model provides a kind of blackboard eraser, this blackboard eraser comprises blackboard eraser main body 1, on the surface of this blackboard eraser main body 1 many bunches of bristles 2 are installed, wherein, described blackboard eraser main body 1 also comprises the housing 4 with cavity 3, also is provided with a plurality of holes 5 that communicate with described cavity 3 on the described surface, and the cavity 3 of described housing 4 also is communicated with aspirator.

Design according to blackboard eraser provided by the utility model is, in blackboard eraser main body 1 housing 4 with cavity 3 is set, and blackboard eraser main body 1 is provided with a plurality of holes 5 that are communicated with this cavity 3, and the aspirator that is communicated with cavity 3 of utilization, when thereby the writing that can be stayed by chalk on to blackboard carries out wiping, aspirator produces negative pressure in the cavity 3 of housing 4, and then the dust that the bristle 2 of blackboard eraser and blackboard friction position are produced sucks in the cavitys 3 by a plurality of holes 5 that are communicated with cavity 3, to realize the purpose of elimination dust.

Thereby, need not existing blackboard and chalk are transformed, only need utilize blackboard eraser provided by the utility model just can play the effect of eliminating dust, thereby use cost is lower, be fit to applying of vast rural area.

According to a kind of embodiment of the present utility model, aspirator comprises vavuum pump, and this vavuum pump is communicated with the cavity 3 of blackboard eraser main body 1 by flexible pipe.

Vavuum pump can be various vavuum pumps commonly used (for example, being used for the vavuum pump that closed container is vacuumized), as long as can play swabbing action, the negative pressure that produces enough degree in cavity 3 gets final product.

This vavuum pump and cavity 3 are by the soft pipe connection of sealing, and like this, when utilizing blackboard eraser provided by the utility model to carry out blackboard wiping, blackboard eraser can not be subjected to being generally the limitation of the vavuum pump that fixedly installs.In other words, when utilizing this blackboard eraser to carry out blackboard wiping because blackboard eraser and vavuum pump be by soft pipe connection, thus the operator can to hand blackboard eraser freely mobile, can be subjected to the restriction of flexible pipe extreme length certainly.

According to another kind of embodiment of the present utility model, as depicted in figs. 1 and 2, cavity 3 has port 6, and aspirator comprises power supply and be installed on the fan (not shown) at port 6 places that power supply is used for to fan supply electric energy.

In this embodiment, aspirator comprises the fan that is arranged on cavity 3 ports 6 places, and this fan comprises motor and by this motor-driven blade.When fan when running up, the air in the cavity 3 can be discharged outside port 6, thus cavity 3 in the formation negative pressure.

Preferably, described blackboard eraser also comprises storage portion, and this storage portion is removably installed in described housing 4, and storage portion only is communicated with cavity 3 by described port 6.Like this, after fan sucked cavity 3 with dust, dust can be stored in the storage portion by port 6 via the fan effect, prevents from further to be diffused in the space outerpace.And storage portion is for removably being connected in housing 4, thereby when needs, storage portion can be unloaded down, to remove the dust that stores.

Storage portion can be various devices with memory function, for example, polybag can be sleeved on port 6 places with sealing, is used to store dust; Perhaps can be installed in port 6 places with a box.

The motor of fan and blade can be Seal Design, to prevent dust adverse effect to fan in the process process of port 6.For example, can electric motor protecting be got up, only make blade be exposed to port 6 places, so that the air in the cavity 3 is applied effect with seal casinghousing.

According to a kind of embodiment of the present utility model, port 6 is provided with the framework 8 of fixedlying connected with the inwall 7 of this port 6, has through hole 9 in this framework 8, and described fan firmly is installed in this through hole 9.

Fan is installed in the through hole 9 of framework 8, thereby makes through hole 9 form the air channel.When needs utilized fan to aspirate, the blade of fan rotated at a high speed, and dust is entered in the cavity 3 via hole 5, and stored through this through hole 9 and entering in the storage portion.

Power supply is used for to fan (motor) power supply, is used for the blade rotation of drive fan.Certainly, switch can also be set, with being electrically connected between control power supply and the motor.As for the selection of power supply and blower, can select according to the power of required swabbing action, for example, bigger if desired suction force can be selected the bigger fan of power.

According to embodiment of the present utility model, power supply can be for being arranged on the battery on the blackboard eraser main body 1, perhaps civilian power supply.

According to another embodiment of the present utility model, aspirator comprises cylinder and the piston that can slide in this cylinder, and described cylinder is communicated with described cavity 3.When needs utilize aspirator that cavity 3 is applied suction force, can start piston, piston is moved in cylinder, thus the air in the suction cavity 3, the negative pressure of the required degree of formation in cavity 3.Thereby dust can enter in the cavity 3 via hole 5, thereby prevents that dust is to being diffused in the space outerpace.

Preferably, blackboard eraser of the present utility model also comprises control device and switch, described control device is electrically connected with described aspirator and switch, and described switch is parallel to described bristle and is arranged on the described surface, and described control device is controlled described aspirator according to the unlatching of this switch.

Described control device can be control elements such as single-chip microcomputer, PLC.

Described switch is arranged near the bristle, and with the length close (preferably being slightly less than the length of bristle) of bristle.When blackboard eraser was not worked, switch was in off status, and then control device can not make aspirator start.

And when blackboard eraser is worked, be pressed on the blackboard owing to exerting pressure to blackboard eraser, this moment, the surface of blackboard can contact with switch with bristle, switch pressurized and the state that is in out, this timed unit receives the signal of telecommunication of switch, can start aspirator and aspirate operation.

After the work of finishing blackboard wiping, blackboard eraser and blackboard are separated, then switch can pressurized and is returned to the state of pass again.

Therefore, utilize the blackboard eraser of this embodiment, when blackboard eraser is not worked, aspirator automatically cuts out, and is pressed on blackboard surface and during work, aspirator automatically aspirates when blackboard eraser, realize the auto-pumping function of blackboard eraser, alleviated operator's labour intensity.

The specific embodiment of the present utility model has more than been described; but those of ordinary skills should be understood that; protection domain of the present utility model is not limited to above description; under the prerequisite of the protection domain that does not break away from claim and limited, can make various improvement, substitutions and modifications to the specific embodiment of the present utility model.

Claims

1. blackboard eraser, this blackboard eraser comprises blackboard eraser main body (1), on the surface of this blackboard eraser main body (1) many bunches of bristles (2) are installed, it is characterized in that, described blackboard eraser main body (1) also comprises the housing (4) with cavity (3), also be provided with a plurality of holes (5) that communicate with described cavity (3) on the described surface, the cavity (3) of described housing (4) also is communicated with aspirator.

2. blackboard eraser according to claim 1 is characterized in that described aspirator comprises vavuum pump, and this vavuum pump is communicated with the cavity (3) of described blackboard eraser main body (1) by flexible pipe.

3. blackboard eraser according to claim 1 is characterized in that, described cavity (3) has port (6), and described aspirator comprises power supply and be installed on the fan that described port (6) is located that described power supply is used for to described fan supply electric energy.

4. blackboard eraser according to claim 3 is characterized in that, described port (6) is provided with the framework (8) of fixedlying connected with the inwall (7) of this port (6), has through hole (9) in this framework (8), and described fan firmly is installed in this through hole (9).

5. according to claim 3 or 4 described blackboard erasers, it is characterized in that described blackboard eraser also comprises storage portion, this storage portion is removably installed in described housing (4), and described storage portion only is communicated with described cavity (3) by described port (6).

6. blackboard eraser according to claim 3 is characterized in that, described power supply is for being arranged on the battery on the described blackboard eraser main body (1), and perhaps described power supply is civilian power supply.

7. blackboard eraser according to claim 1 is characterized in that, described aspirator comprises cylinder and the piston that can slide in this cylinder, and described cylinder is communicated with described cavity (3).

8. blackboard eraser according to claim 1, it is characterized in that, described blackboard eraser also comprises control device and switch, described control device is electrically connected with described aspirator and switch, described switch is parallel to described bristle and is arranged on the described surface, and described control device is controlled described aspirator according to the unlatching of this switch.