CN201633407U

CN201633407U - Automatic blackboard eraser

Info

Publication number: CN201633407U
Application number: CN2010200332057U
Authority: CN
Inventors: 王宏超
Original assignee: Shanghai Maritime University
Current assignee: Shanghai Maritime University
Priority date: 2010-01-19
Filing date: 2010-01-19
Publication date: 2010-11-17
Anticipated expiration: 2020-01-19

Abstract

The utility model discloses an automatic blackboard eraser which mainly comprises metal guide rails at the upper and lower sides, a crossbeam, a sponge, a rolling wheel, a driving motor, a rotating shaft, a string and metal side edges at the two sides, wherein the string fixed at the bottom part of the crossbeam is mainly used as a simplified traction mechanism of the automatic blackboard eraser; the metal side edges are combined together with the metal guide rails to form a group of metal frames arranged at the rim part of a blackboard; and the rolling wheel adopts an inwards-concave pulley with small friction coefficient. In terms of apparatus selection, the automatic blackboard eraser adopts the inwards-concave pulley to reduce the friction force generated in working. As a track in the structure of each metal frame is used, production steps are simplified. When in installation, the installing distance between the blackboard eraser and the blackboard is convenient to judge. As the string with high traction efficiency is used, the installation and maintenance steps can be well simplified.

Description

A kind of automatic blackboard eraser

Technical field

The utility model relates to the teaching aid field, particularly be a kind ofly can be convenient to the user and carry out blackboard wiping and the simple automatic blackboard eraser of mounting structure.

Background technology

Blackboard is a necessary tool in the education and instruction, and the cleaning of blackboard then must be used this teaching aid of blackboard eraser.Existing blackboard eraser mainly is that the mode by manually erases the board, so not only increased work load but also lost time, and those write at position, corner such as blackboard eminence, lower and arm along stretch less than the writing in place, often just be difficult for wiped clean, be easy to have influence on the writing on the blackboard quality of monoblock blackboard like this, thereby reduced the efficient of student's study.

For this reason, according to actual needs, many technical schemes about the automatic blackboard eraser that can realize the automatic wiping of blackboard are also being disclosed on the market, one piece of Chinese patent as the Decree of Patent Office of China in 2008, its invention (design) is artificial: kingliness force, application number is: 200720019597.X, name is called: a kind of utility model patent of automatic eraser device.This piece technical scheme is one piece of of great value utility model, the novel guide rail that is set in parallel in the blackboard above and below that mainly comprises of this use, be provided with the support that can reciprocatingly slide at the driving lower edge of drive unit two guide rails between two guide rails, but support is provided with the blackboard eraser of brushing blackboard, and the blackboard both sides are respectively equipped with and can control the reciprocatingly slide control device of traverse of support; And on guide rail, also be respectively equipped with the adjusting device that to adjust two guide rail positions.Though this piece uses novel existing problem can well solve use manual operations blackboard wiping the time, but many deficiencies are arranged, such as whole apparatus structure complexity, I﹠M inconvenience, and when work, because coefficient of friction is excessive, be easy to generate the flimsy problem of noise pollution and workpiece between each workpiece.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of automatic blackboard eraser, to solve the existing existing complex structure of automatic eraser device, awkward problem.

To achieve these goals, the utility model is to realize by the following technical solutions:

A kind of automatic blackboard eraser, mainly comprise and being set in parallel on the blackboard, the metal guide rail of following both sides, be arranged on, the crossbeam that is used to serve as the automatic blackboard eraser support between following two metal guide rail, the back side that is installed in crossbeam is used for the sponge of blackboard wiping, be arranged on, the metal guide rail of following both sides and the roller between the crossbeam, be arranged on the drive motors of blackboard one side, and be arranged on the turning cylinder of blackboard opposite side, described automatic blackboard eraser also is provided with and is used to draw the reciprocating cord of automatic blackboard eraser, and be installed in a blackboard left side, the metal side of right both sides, the mode that described cord one end twines with forward is wrapped on the end of output shaft of drive motors, the middle part links to each other with the crossbeam of automatic blackboard eraser, the other end is then after turning cylinder turns to, mode with reverse winding is wrapped on the other end of output shaft, described metal side and last, the metal guide rail of following both sides is combined, form one group of metal framework that is installed in position, blackboard edge, described roller adopts to have than less friction, can effectively prevent the indent pulley that automatic blackboard eraser topples.

In the front of described crossbeam, also be provided with one and be convenient to the handle that the user uses.

The utility model is simple in structure, easy to use, has adopted the indent pulley of concave inward structure design in the design of roller, the frictional force when having reduced work greatly; And the track that adopts metal framework structure to design has not only been simplified production stage greatly when making, and can also play when mounted and be convenient to the function that the user judges blackboard eraser and blackboard installing space; As the fine rule of the tie that draws the utility model work, when effectively raising propulsive efficiency, can also simplify the step of whole device I﹠M greatly.

Description of drawings

Describe the utility model in detail below in conjunction with the drawings and specific embodiments;

Fig. 1 is a structure schematic diagram of the present utility model.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the utility model.

The utility model is a kind of automatic blackboard eraser, be mainly used in and solve existing automatic blackboard eraser, because the complexity of structure, to such an extent as to tend to occur installation and removal inconvenience, and in use, also can be owing to coefficient of friction excessive between work package, to such an extent as to have a strong impact on the problem of usability, on the basis of traditional automatic blackboard eraser, carried out simple improvement design for this reason.

The drive motors 31 that the utility model mainly comprises the metal upper rail 11 and the lower guideway 12 that are set in parallel in the upper and lower both sides of blackboard, be arranged on the crossbeam 2 that is used to serve as the automatic blackboard eraser support between upper and lower two

metal guide rail

11,12, be installed in roller 21 between sponge, the

metal guide rail

11,12 that is arranged on upper and lower both sides and the crossbeam 2 that crossbeam 2 back sides are used for blackboard wiping, be arranged on blackboard one side and transformer 4 and be arranged on the turning cylinder 32 of blackboard opposite side.

Because the utility model is when design, consider that blackboard eraser and blackboard 1 paste tightly more in use, frictional force is big more, easy of more blackboard 1 wiped clean, but can produce the forward travel that bigger frictional force hinders the automatic blackboard eraser that is driven by drive motors 4, make that the transverse movement of blackboard eraser is difficult more.Solving on this group contradictory problems, according to formula: P=F*V, promptly at the speed V of blackboard eraser transverse movement (being positively correlated with the revolution of the engine that drives the blackboard eraser motion) regularly, the power P of engine is big more, just can provide bigger power for the motion of blackboard eraser; Blackboard eraser is not near more good more with contacting of blackboard 1 simultaneously, but to reach a suitable degree---both can make blackboard eraser can effectively wipe the chalk marking on the blackboard when mobile on blackboard surface, can seriously not hinder the transverse movement of blackboard eraser or it is stuck again.

For this reason, according to above-mentioned analysis, can respectively install a

metal side

13 and 14 in the both sides of normal blackboard earlier, make

metal side

13,14 can with fitting together that upper rail 11 and lower guideway 12 match, form one and be installed in blackboard 1 metal framework all around, in the metal framework of this structure, the

metal side

13,14 of and arranged on left and right sides can play and prevent that automatic blackboard eraser from skidding off the effect of blackboard 1, and metal upper rail 11 can play the effect of serving as chute with lower guideway 12; And when metal framework is installed, only need by regulating the distance between metal framework and blackboard 1 surface, just can make the spacing between whole automatic blackboard eraser and the blackboard 1 can be adjusted to suitable position easily, just metal framework can be fixed on the blackboard then.

And for the selection of roller 21, then can select indent pulley for use with concave inward structure design, when mounted, only need be fixed in the movable part that on crossbeam 2, serves as whole blackboard eraser earlier, simultaneously, with the part of indent pulley by its indent, being installed on the upper and lower

metal guide rail

11,12 of cooperation.Do like this, not only on to greatest extent, reduced the frictional force between roller 21 and the upper and lower

metal guide rail

11,12, under the certain prerequisite of engine power, more can strengthen the operating efficiency of blackboard eraser as far as possible, make blackboard eraser can remove dust more up hill and dale attached to the blackboard surface; And can also play effective stabilization to blackboard eraser, make it can depend on the blackboard surface easily, prevent to form unnecessary setting angle between itself and the blackboard and cause some zones of blackboard to wipe sordid problem.

And consider actual manufacturing and make things convenient for problem when using, the utility model is when design, and the driving mechanism that also is required to be the drive motors 3 of the traditional automatic blackboard eraser that is used to drive roller 21 motions has carried out simplifying to greatest extent.For this reason, can select for use toughness preferably fine rule 5 be used as drawing the device of blackboard eraser work, so just can be in the work of simplifying I﹠M, the frictional force in the time of can reducing whole device work again improves transmission efficiency.When mounted, the mode that fine rule 5 one ends twine with forward can be wrapped on the end of output shaft 31 of drive motors 3, the middle part is fixed on the bottom of the crossbeam 2 of automatic blackboard eraser, the other end then is wrapped on the other end of output shaft 31 after turning cylinder 32 turns in the mode of reverse winding, and cord 5 two ends all need at the fine rule that twines sufficient length on the output shaft 31 when twining, like this under the drive of the output shaft 31 that rotates, fine rule 5 two ends can realize that an end twines fine rule on output shaft 31, the other end then unclamps fine rule automatically on output shaft 31, thereby the motion by cord 5 drives crossbeam 2 at guide rail 11, move left and right on 12 makes blackboard eraser to come wiping monoblock blackboard 1 according to actual conditions.

For this reason, when the utility model uses, only need earlier transformer 4 to be connected in the external power source, then just can be according to the needs of actual conditions, the output shaft 31 of controlling drive motors 3 that uses a teleswitch turns to, feasible fine rule 5 as drafting tool can well play the effect that pulling roller 21 rolls, thereby realizes that the pulling blackboard eraser moves the purpose that realizes Automatic erasing blackboard.The basic parameter of the utility model when work can be as follows:

Project	Parameter
Project	Parameter	Engine speed	30 rev/mins
Engine power	1.5 watt	Engine speed	30 rev/mins
Engine power	1.5 watt	The engine input voltage	13 volts of direct currents
The blackboard eraser gait of march	0.5 rice/minute	The engine input voltage	13 volts of direct currents

And in whole device installing engineering,, up knob 22 can also be set, be convenient to the user and use at the positive position of crossbeam 2 in order to increase convenience as crossbeam 2 installation and removal of critical piece.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. automatic blackboard eraser, mainly comprise and being set in parallel on the blackboard, the metal guide rail of following both sides, be arranged on, the crossbeam that is used to serve as the automatic blackboard eraser support between following two metal guide rail, the back side that is installed in crossbeam is used for the sponge of blackboard wiping, be arranged on, the metal guide rail of following both sides and the roller between the crossbeam, be arranged on the drive motors of blackboard one side, and be arranged on the turning cylinder of blackboard opposite side, it is characterized in that, described automatic blackboard eraser also is provided with and is used to draw the reciprocating cord of automatic blackboard eraser, and be installed in a blackboard left side, the metal side of right both sides, the mode that described cord one end twines with forward is wrapped on the end of output shaft of drive motors, the middle part links to each other with the crossbeam of automatic blackboard eraser, the other end is then after turning cylinder turns to, mode with reverse winding is wrapped on the other end of output shaft, described metal side and last, the metal guide rail of following both sides is combined, form one group of metal framework that is installed in position, blackboard edge, described roller adopts to have than less friction, can effectively prevent the indent pulley that automatic blackboard eraser topples.

2. a kind of automatic blackboard eraser according to claim 1 is characterized in that, in the front of described crossbeam, also is provided with one and is convenient to the handle that the user uses.