CN207657475U

CN207657475U - A selectively mistake blackboard eraser

Info

Publication number: CN207657475U
Application number: CN201720820606.9U
Authority: CN
Inventors: 赵芮晨
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-07-07
Filing date: 2017-07-07
Publication date: 2018-07-27
Anticipated expiration: 2027-07-07

Abstract

The utility model is related to selective one time to cross blackboard eraser, including blackboard body, the upper surface slide formula of the blackboard body is connected with blackboard brush assembly, the blackboard brush assembly includes blackboard eraser shell and cleaning fixing piece, the plane that blackboard eraser shell and blackboard body are in contact is inwardly concaved from top to bottom there are two above groove, the position that the upper surface of blackboard eraser shell corresponds to each groove offers ladder hole, laterally it is laid with cleaning fixing piece in each groove, finite place piece is laid in blackboard body and the upper and lower side of blackboard eraser shell, the locating part includes the third spring for being relatively fixed the gag lever post in " n " font in blackboard body upper and lower side and being separately fixed at blackboard eraser shell upper and lower side left end, the lower end of the third spring is mounted to the bar wall of gag lever post；The upper surface of blackboard brush assembly is laid with handle.The utility model is simple in structure, it is easy to use, can unrestricted choice wiped area, effectively improve classroom operating efficiency.

Description

A selectively mistake blackboard eraser

Technical field

The utility model belongs to realia field, more particularly to a selectively mistake blackboard eraser.

Background technology

Though existing teaching method mostly uses more intuitive, image multimedia teaching, along with a sheet by a sheet lantern slide Switching, student seem the impression to emphasis without very deep, and a class finishes, and stays in the remaining nothing of thing in brain instead It is several；Therefore the effect of teaching method, that is, blackboard of most original is still very important, blackboard can effectively reflect student on class Cognition life, existing blackboard needs to wipe out old content by blackboard eraser, then carry out new content during teaching board Write-in, but the area of blackboard eraser is far smaller than the area of blackboard at present, needs constantly to brandish arm and carries out wiping operation, position It is unclean to set high place wiping, needs to beat or depend on chair and is wiped, efficiency is low, poor safety performance while, also It is easy to increase the morbidity risk rate of teaching profession's disease；

Patent ZL 201420773477.9 discloses a kind of blackboard eraser, blackboard and blackboard eraser and is carried out by sliding rail and idler wheel It horizontally slips, roller is set on blackboard eraser, cleaned in one layer of clean layer of roller outer wrapping and blackboard contact；Although wiping Area is big, but clean layer is all contacted with blackboard from top to bottom, is unable to unrestricted choice wiped area, will can be needed to leave on blackboard Content also wipe, teacher need re-start writing, reduce the operating efficiency in classroom；Simultaneously after drum of damage, need pair Roller is integrally replaced, and maintenance cost is increased；It is not limited accordingly between sliding rail and idler wheel, it is existing to be susceptible to " derailing " As safety is relatively low.

Utility model content

For the above situation, the purpose of this utility model be to provide it is a kind of it is simple in structure, easy to use, can unrestricted choice wipe Wipe a time mistake blackboard eraser of selectivity in region.

To achieve the goals above, the technical solution of the utility model is：

A selectively mistake blackboard eraser, including blackboard body, the upper surface slide formula of the blackboard body are connected with blackboard Brush assembly, the blackboard brush assembly include blackboard eraser shell and cleaning fixing piece, and blackboard eraser shell is buckled in horizontal " n " font to black On plate ontology, plane that blackboard eraser shell and blackboard body are in contact inwardly concaves that there are two above grooves from top to bottom, black The position that the upper surface of blackboard eraser shell corresponds to each groove offers ladder hole, is laterally laid in each groove Fixing piece is cleaned, the cleaning fixing piece includes fixed frid and is wrapped to the cleaning device in fixed frid, the fixing groove The upper surface of plate is connected with button by the first spring, and the upper surface of the button passes through ladder hole, the side wall of button and rank Second spring is connected between the madial wall of terraced through-hole, the front end of groove is longitudinally laid with Plastic hanger, and the upper of fixed frid is put down Face is longitudinally laid with plastic hanging hooked scarf, and the side of the plastic hanging hooked scarf inwardly offers company corresponding with the gib head of Plastic hanger The hook hole connect；Finite place piece is laid in blackboard body and the upper and lower side of blackboard eraser shell, the locating part includes relatively solid The gag lever post in " n " font that is scheduled in blackboard body upper and lower side and it is separately fixed at blackboard eraser shell upper and lower side left end The lower end of third spring, the third spring is mounted to the bar wall of gag lever post；The upper surface of blackboard brush assembly is laid with handle.

Further, the slidingtype is connected as that the upper and lower side of blackboard body is opposed, inwardly directed respectively recessed to be had as sliding rail The lower notches used, are laid with pulley on two madial walls up and down of blackboard eraser shell respectively, the pulley correspond to lay it is supreme In lower groove.

Further, the blackboard eraser shell is in strip, and the longitudinal length of blackboard eraser shell is not less than blackboard body Longitudinal length.

Further, the upper surface of the button is higher than the upper surface of blackboard eraser shell.

Further, the wherein one side of the cleaning device and opposite, remaining five bread of blackboard body are wrapped up in fixed frid, Cleaning device is sponge, cotton or felt.

Further, it is clearance fit between the Plastic hanger and hook hole, Plastic hanger is away between blackboard body Distance is less than plastic hanging hooked scarf away from the distance between blackboard body.

Further, the length of the gag lever post is not more than the lateral length of blackboard body.

The beneficial effects of the utility model are：

The utility model lay blackboard brush assembly can large area wipe, arm of brandishing that need not be round-trip wiped Operation is wiped, being written on the high content in position on blackboard can also wipe out, and need not beat or depend on chair is wiped, effectively Raising efficiency and security performance, reduce teaching profession's disease morbidity risk rate；

Cleaning fixing piece is no longer that independent entirety is fixed on blackboard eraser shell, but multiple seperated compositions are wiped It wipes, when selectivity being needed to wipe subregion, pressable button makes plastic hanging hooked scarf fix Plastic hanger, cleaning device from recessed The projecting inward contact blackboard of slot carries out wiping operation, because the cleaning device discord blackboard in other regions on corresponding blackboard is directly connect It touches, therefore the word for needing to retain on blackboard will not be wiped, improve the operating efficiency in classroom；Meanwhile it being made of multiple fissions clear Clean fixing piece can individually carry out local replacing, and maintenance cost is also reduced while being convenient for changing；

Finite place piece is laid in blackboard body and the upper and lower side of blackboard eraser shell, the length of the gag lever post in locating part is not More than the lateral length of blackboard body, therefore blackboard eraser shell is with blackboard body when being slided, by third spring and gag lever post It restrains, prevents " derailing " phenomenon, increase security performance；

The upper surface of blackboard brush assembly is laid with handle, by pushing handle that blackboard brush assembly is made to be transported in blackboard body It is dynamic, prevent the trace that hand and blackboard eraser shell are in direct contact word when being wiped to be stained with to hand, while preventing hand from pushing back In dynamic process and blackboard contacts the finger that frays, and can effectively avoid the hair of hand " slippage " phenomenon from blackboard eraser shell It is raw.

Description of the drawings

Fig. 1 is time structural schematic diagram for crossing blackboard eraser of the utility model selectivity.

Fig. 2 is time positive structure schematic for crossing blackboard eraser of the utility model selectivity.

Fig. 3 be the utility model selectivity one time cross blackboard eraser Fig. 1 in structural schematic diagram from A to partial enlargement.

Fig. 4 be the utility model selectivity one time cross blackboard eraser Fig. 1 in structural schematic diagram from B to partial enlargement.

Attached figure label is：1 is blackboard body, and 2 be blackboard eraser shell, and 3 be third spring, and 4 be pulley, and 5 be button, 6 It is fixed frid for the first spring, 7,8 be cleaning device, and 9 be Plastic hanger, and 10 be plastic hanging hooked scarf, and 11 be groove, and 12 be handle Hand, 13 be gag lever post, and 14 be ladder hole, and 15 be second spring, and 16 be hook hole, and 17 be lower notches.

Specific implementation mode

The utility model is further illustrated with reference to the accompanying drawings and detailed description：

As shown in Figure 1 to 4, a selectively blackboard eraser, including blackboard body 1 excessively, the upper surface of the blackboard body 1 Slidingtype is connected with blackboard brush assembly, and the blackboard brush assembly includes blackboard eraser shell 2 and cleaning fixing piece, blackboard eraser shell 2 In on horizontal " n " font button to blackboard body 1, blackboard eraser shell 2 is in strip, and the longitudinal length of blackboard eraser shell 2 is not less than The longitudinal length of blackboard body 1；There are two the plane that blackboard eraser shell 2 and blackboard body 1 are in contact inwardly concaves from top to bottom Above groove 11, the position that the upper surface of blackboard eraser shell 2 corresponds to each groove 11 offer ladder hole 14, Mei Gesuo It states and is laterally laid with cleaning fixing piece in groove 11, the cleaning fixing piece includes fixed frid 7 and is wrapped to fixing groove Opposite, remaining five bread of wherein one side and blackboard body 1 of cleaning device 8 in plate 7, cleaning device 8 are wrapped up in fixed frid 7, clearly Clean part 8 is sponge, cotton or felt；The upper surface of the fixed frid 7 is connected with button 5, the button by the first spring 6 5 upper surface passes through ladder hole 14, the upper surface of button 5 to be higher than the upper surface of blackboard eraser shell 2, the side wall of button 5 and rank Second spring 15 is connected between the madial wall of terraced through-hole 14, the front end of groove 11 is longitudinally laid with Plastic hanger 9, fixed frid 7 upper plane is longitudinally laid with plastic hanging hooked scarf 10, and the side of the plastic hanging hooked scarf 10 inwardly offers and Plastic hanger 9 The hook hole 16 of the corresponding connection of gib head is clearance fit between Plastic hanger 9 and hook hole 16, and Plastic hanger 9 is away from blackboard sheet The distance between body 1 is less than plastic hanging hooked scarf 10 away from the distance between blackboard body 1；Blackboard body 1 and blackboard eraser shell 2 it is upper Lay finite place piece on downside, the locating part includes that be relatively fixed in 1 upper and lower side of blackboard body be in " n " font The lower end of gag lever post 13 and the third spring 3 for being separately fixed at 2 upper and lower side left end of blackboard eraser shell, the third spring 3 is hung It is connected on the bar wall of gag lever post 13, the length of gag lever post 13 is not more than the lateral length of blackboard body 1；The upper table of blackboard brush assembly Face is laid with handle 12；

Slidingtype described in the present embodiment is connected as that the upper and lower side of blackboard body 1 is opposed, inwardly directed respectively recessed to be had as cunning The lower notches 17 that rail uses, pulley 4 is laid on two madial walls up and down of blackboard eraser shell 2 respectively, and the pulley 4 corresponds to cloth If to lower notches 17.

In use, as needed wiped area position, select the button 5 of corresponding position to be pressed, the first spring 6 with Compression then drive fixed frid 7 move to 1 direction of blackboard body, the Plastic hanger that plane is longitudinally laid on fixation frid 7 Block 10 does movement in the same direction with fixed frid 7, until the hook hole 16 on plastic hanging hooked scarf 10 corresponds to Plastic hanger 9, makes Plastic hanger 9 Be inserted into hook hole 16, because both of which is plastics and is clearance fit therefore is completely embedded, then without natural compression under the action of Be not in " disengaging " phenomenon, release button 5, at this time cleaning device 8 and the opposite face of blackboard body 1 contact with each other, hold handle 12 push blackboard brush assembly, the lower notches 17 that blackboard eraser shell 2 is used in the drive lower edge of pulley 4 as sliding rail to be controlled The movement of position, cleaning device 8 can carry out wiping operation to the word in blackboard body 1, remaining cleaning device 8 is located in groove 11 Discord blackboard body 1 is in direct contact, therefore will not wipe out the word for needing to retain；When the later stage in use, what former needs wiped When word in region needs to retain, button 5 is pulled out, is influenced by external force, hook hole 16 is skidded off from Plastic hanger 9, clearly Clean fixing piece moves out therewith, and the cleaning device 8 in the region is no longer contacted with blackboard body 1, therefore word can be made to be retained in blackboard On ontology 1.

It is worth noting that when unused, cleaning device 8 and blackboard body 1 not in contact with；The side wall and ladder of button 5 It is connected with second spring 15 between the madial wall of through-hole 14, therefore fixed button 5, so that button is not absorbed in ladder hole 14 or is gone out Existing offset phenomena ensures the normal use of button 5, while because second spring 15 is elastic material, therefore does not interfere with pressing for button 5 Pressure pulls operation；The lower notches 17 that blackboard eraser shell 2 is used in the drive lower edge of pulley 4 as sliding rail carry out left and right position It is mobile when, the third spring 3 on blackboard eraser shell 2 carries out the movement of left and right position along the gag lever post 13 of " n " font, works as blackboard Wipe shell 2 slide position to gag lever post 13 left or right when, by the containing of third spring 3, blackboard eraser shell 2 is no longer transported It is dynamic.

The embodiment of the above, the only preferred embodiment of the utility model not limit the utility model Practical range, therefore the equivalent change or modification that all structure, feature and principles according to described in the utility model patent range are done, It should be included in present utility model application the scope of the claims.

Claims

1. selective one time is crossed blackboard eraser, including blackboard body（1）, which is characterized in that the blackboard body（1）Upper surface slide Dynamic formula is connected with blackboard brush assembly, and the blackboard brush assembly includes blackboard eraser shell（2）With cleaning fixing piece, blackboard eraser shell （2）In horizontal " n " font button to blackboard body（1）On, blackboard eraser shell（2）And blackboard body（1）The plane being in contact is from upper Above groove there are two being inwardly concaved under（11）, blackboard eraser shell（2）Upper surface correspond to each groove（11）Position Offer ladder hole（14）, each groove（11）Inside laterally it is laid with cleaning fixing piece, the cleaning fixing piece Including fixed frid（7）Be wrapped to fixed frid（7）Interior cleaning device（8）, the fixed frid（7）Upper surface pass through First spring（6）It is connected with button（5）, the button（5）Upper surface pass through ladder hole（14）, button（5）Side wall and Ladder hole（14）Madial wall between be connected with second spring（15）, groove（11）Front end be longitudinally laid with Plastic hanger （9）, fixed frid（7）Upper plane be longitudinally laid with plastic hanging hooked scarf（10）, the plastic hanging hooked scarf（10）Side it is inside It offers and Plastic hanger（9）The corresponding connection of gib head hook hole（16）；Blackboard body（1）With blackboard eraser shell（2）'s Finite place piece is laid in upper and lower side, the locating part includes being relatively fixed in blackboard body（1）In upper and lower side is in " n " word The gag lever post of type（13）Be separately fixed at blackboard eraser shell（2）The third spring of upper and lower side left end（3）, the third spring （3）Lower end mount to gag lever post（13）Bar wall on；The upper surface of blackboard brush assembly is laid with handle（12）.

2. time mistake blackboard eraser of selectivity according to claim 1, which is characterized in that the slidingtype is connected as blackboard sheet Body（1）Upper and lower side opposed, inwardly directed respectively recessed have the lower notches used as sliding rail（17）, blackboard eraser shell（2）It is upper It is laid with pulley respectively on lower two madial walls（4）, the pulley（4）It is corresponding to lay to lower notches（17）It is interior.

3. time mistake blackboard eraser of selectivity according to claim 1, which is characterized in that the blackboard eraser shell（2）In length Strip, blackboard eraser shell（2）Longitudinal length be not less than blackboard body（1）Longitudinal length.

4. time mistake blackboard eraser of selectivity according to claim 1, which is characterized in that the button（5）Upper surface it is high In blackboard eraser shell（2）Upper surface.

5. time mistake blackboard eraser of selectivity according to claim 1, which is characterized in that the cleaning device（8）Wherein one Face and blackboard body（1）Opposite, remaining five bread are wrapped up in fixed frid（7）It is interior, cleaning device（8）For sponge, cotton or felt.

6. time mistake blackboard eraser of selectivity according to claim 1, which is characterized in that the Plastic hanger（9）And hook Hole（16）Between be clearance fit, Plastic hanger（9）Away from blackboard body（1）The distance between be less than plastic hanging hooked scarf（10）Away from black Plate ontology（1）The distance between.

7. time mistake blackboard eraser of selectivity according to claim 1, which is characterized in that the gag lever post（13）Length not More than blackboard body（1）Lateral length.