CN206186631U - Novel blackboard graphics primitive - Google Patents

Abstract

The utility model discloses a novel blackboard graphics primitive, include arc, dust collection plate, draw dirt board and dust absorption pump, the arc passes through the fixed band to be fixed on user's forearm, dust collection plate fixes the extrados of arc, dust collection plate with the contact surface department of arc is provided with vacuum cleaner chamber, vacuum cleaner chamber's front end sets up to the dust absorption mouth, vacuum cleaner chamber's rear end lead to air through tube with the dust absorption pump intercommunication, draw the inner of dirt board with dust collection plate fixed connection, and be located vacuum cleaner chamber's the outside. The utility model relates to a novel blackboard graphics primitive passes through the arc to be fixed on user's forearm, through dust collection plate with draw the chalk dust that the dirt board dropped in with writing process and collect, then lead to air through tube and dust absorption pump adsorbs it to avoided the chalk dust to drop in the air, affect using person's health.

Description

A kind of new type blackboard drawing instrument

Technical field

The utility model is related to teaching aid, more particularly to a kind of new type blackboard drawing instrument.

Background technology

Most of blackboards are appointed at this stage so needs to coordinate chalk to be used, because the operation principle of chalk, is entering During row blackboard writing, part chalk dust is often scattered in atmosphere, if user is chronically under this kind of environment, may Cause the occupational diseases such as pneumoconiosis occur, be unfavorable for that user's is healthy, while easily causing the pollution of local environment, it is being wiped During blackboard, the quantity of dust more wins.

Utility model content

The purpose of this utility model is that and provide a kind of new type blackboard drawing instrument in order to solve the above problems.

The utility model is achieved through the following technical solutions above-mentioned purpose：

A kind of new type blackboard drawing instrument, including arc, dust-catching board, causing dust plate and dust suction pump, the arc pass through Fixing band is fixed on the forearm of user, and the dust-catching board is fixed on the extrados of the arc, the dust-catching board and institute State and vacuum chamber is provided with the contact surface of arc, the front end of the vacuum chamber is set to suction port, the rear end of the vacuum chamber Connected with the dust suction pump by tracheae, the inner of the causing dust plate is fixedly connected with the dust-catching board, and positioned at the dust suction The outside in chamber.

Specifically, arc chute is provided with the lateral wall of the vacuum chamber, the causing dust plate includes arc skateboard and ladder Shape plate, the outer end of the arc skateboard is fixedly connected with the short side of the trapezoidal plate, and the inner of the arc skateboard is arranged on institute State in arc chute and can be slided along the arc chute.

Further, it is provided with return spring between the inner face of the inner face of the arc chute and the arc skateboard.

Preferably, multiple rollers, the axis of the roller and the trapezoidal plate are provided with the side long of the trapezoidal plate Side long overlaps, and the plane where the roller is parallel with the vertical line on the side long of the trapezoidal plate.

Preferably, it is provided with flexible strip between two sides of the arc and the fixing band.

The beneficial effects of the utility model are：

A kind of new type blackboard drawing instrument of the utility model is fixed on the forearm of user by arc, by inhaling Then dirt plate and causing dust plate are adsorbed, so as to keep away the chalk ash collection dropped in writing process by tracheae and dust suction pump Exempt from during chalk dust falls to air, to influence the health of user.

Brief description of the drawings

Fig. 1 is a kind of sectional view of new type blackboard drawing instrument described in the utility model；

Fig. 2 is the structural representation of causing dust plate described in the utility model.

Specific embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings：

As depicted in figs. 1 and 2, a kind of new type blackboard drawing instrument of the utility model, including arc 1, dust-catching board 3, draw Dirt plate and dust suction pump 10, arc 1 are fixed on the forearm of user by fixing band 2, and dust-catching board 3 is fixed on arc 1 Extrados, vacuum chamber 6 is provided with dust-catching board 3 and the contact surface of arc 1, and the front end of vacuum chamber 6 is set to suction port, dust suction The rear end in chamber 6 is connected by tracheae 9 with dust suction pump 10, and the inner of causing dust plate is fixedly connected with dust-catching board 3, and positioned at vacuum chamber 6 Outside, be provided with arc chute 7 on the lateral wall of vacuum chamber 6, causing dust plate includes arc skateboard 4 and trapezoidal plate 5, arc skateboard 4 outer end is fixedly connected with the short side of trapezoidal plate 5, and the inner of arc skateboard 4 is arranged in arc chute 7 and can arcuately chute 7 slide, and return spring 8 are provided between the inner face of arc chute 7 and the inner face of arc skateboard 4, on the side long of trapezoidal plate 5 Multiple rollers 11 are provided with, the axis of roller 11 overlaps with the side long of trapezoidal plate 5, the plane and trapezoidal plate 5 where roller 11 The vertical line on side long is parallel, and flexible strip is provided between two sides of arc 1 and fixing band 2.

A kind of operation principle of new type blackboard drawing instrument of the utility model is as follows：

Be fixed on arc 1 at forearm by fixing band 2 by user, then and by dust suction pump 10 and tracheae 9 is placed on The position for not hindering it normally to write, during writing, causing dust plate is located at the lower section of user's palm, and makes causing dust plate The side long of trapezoidal plate 5 contacted with blackboard surface, the roller 11 being arranged on side long can avoid rubbing between trapezoidal plate 5 and blackboard Wiping power is excessive, while situation of the arm closer or far from blackboard may be occurred according to situation about writing, therefore by setting Arc chute 7, arc skateboard 4 and return spring 8 can be such that trapezoidal plate 5 is contacted with blackboard all the time, so as to the chalk dust that will fall off It is connected on trapezoidal plate 5.

Other, in order to prevent from dropping, the chalk dust on trapezoidal plate 5 is slid, and two hypotenuses of trapezoidal plate 5 are bent up Song, so that trapezoidal plate 5 is presented arcuate structure as arc skateboard 4.

Dust suction pump 10 works, and the air in vacuum chamber 6 is extracted by tracheae 9, so that the sky of the front end of vacuum chamber 6 Gas flows in vacuum chamber 6, and then the chalk dust on causing dust plate can be driven to be moved in vacuum chamber 6, then by tracheae 9 by its Extract to dust suction pump 10 and be collected.

The technical solution of the utility model is not limited to the limitation of above-mentioned specific embodiment, every according to skill of the present utility model The technology deformation that art scheme is made, each falls within protection domain of the present utility model.

Claims (5)

1. a kind of new type blackboard drawing instrument, it is characterised in that：Including arc, dust-catching board, causing dust plate and dust suction pump, the arc Shape plate is fixed on the forearm of user by fixing band, and the dust-catching board is fixed on the extrados of the arc, the suction Vacuum chamber is provided with dirt plate and the contact surface of the arc, the front end of the vacuum chamber is set to suction port, the dust suction The rear end in chamber is connected by tracheae with the dust suction pump, and the inner of the causing dust plate is fixedly connected with the dust-catching board, and is located at The outside of the vacuum chamber.

2. a kind of new type blackboard drawing instrument according to claim 1, it is characterised in that：On the lateral wall of the vacuum chamber Arc chute is provided with, the causing dust plate includes arc skateboard and trapezoidal plate, the outer end of the arc skateboard and the trapezoidal plate Short side be fixedly connected, the inner of the arc skateboard is arranged in the arc chute and can be slided along the arc chute.

3. a kind of new type blackboard drawing instrument according to claim 2, it is characterised in that：The inner face of the arc chute Return spring is provided with and the inner face of the arc skateboard between.

4. a kind of new type blackboard drawing instrument according to claim 2, it is characterised in that：Set on the side long of the trapezoidal plate Multiple rollers are equipped with, the axis of the roller overlaps with the side long of the trapezoidal plate, the plane where the roller and the ladder The vertical line on the side long of shape plate is parallel.

5. a kind of new type blackboard drawing instrument according to claim 1, it is characterised in that：Two sides of the arc with Flexible strip is provided between the fixing band.