CN110202986A - Interchangeable disposable cloth blackboard eraser - Google Patents
Interchangeable disposable cloth blackboard eraser Download PDFInfo
- Publication number
- CN110202986A CN110202986A CN201910576847.7A CN201910576847A CN110202986A CN 110202986 A CN110202986 A CN 110202986A CN 201910576847 A CN201910576847 A CN 201910576847A CN 110202986 A CN110202986 A CN 110202986A
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- Prior art keywords
- disposable cloth
- lower plate
- cloth
- plate
- fixed cavity
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- 239000004744 fabric Substances 0.000 title claims abstract description 156
- 238000005498 polishing Methods 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 14
- 241000628997 Flos Species 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The present invention provides a kind of interchangeable disposable cloth blackboard eraser, belong to the teaching equipment field of wiping letter written with chalk, including polishing piece, upper cover, lower plate and middle plate, the first fixed cavity with opening is formed between upper cover and middle plate, upper cover adjusts the opening bore of the first fixed cavity by rotating with one end of middle plate, first fixed cavity is open bore by adjusting it to maintain the state of clamping or relaxation with one end of polishing piece, lower plate has the wiping surface facing with word to be wiped, the wiping surface of lower plate is covered by polishing piece, the second fixed cavity with opening is formed between lower plate and middle plate, lower plate adjusts the opening bore of the second fixed cavity by rotating with the other end of middle plate, second fixed cavity is open bore by adjusting it to maintain the state of clamping or relaxation with the other end of polishing piece；The present invention removes letter written with chalk with having the advantages that simple and efficient.
Description
Technical field:
The invention belongs to wipe the teaching equipment field of letter written with chalk, and in particular to a kind of interchangeable disposable cloth blackboard eraser.
Background technique:
Blackboard eraser be it is essential in our daily lifes as teaching aid, and there is following for common blackboard eraser
Defect, i.e. a new blackboard eraser have a large amount of chalk dust and are sticked on blackboard eraser, blackboard eraser is caused to use after using repeatedly
Time it is longer, the effect of wiping chalk word is poorer, but also will cause chalk dust and disorderly float, and affects teaching efficiency and the body of teacher
Body health.
The type of blackboard eraser also has much at present, including manual blackboard eraser and automatic blackboard eraser, some are in one piece of plank
On fix a fritter sponge cloth, also some are by wiping of the replacement rich in electrostatic adsorption force by traditional blackboard eraser to reduce powder
Pen ash descends slowly and lightly, but these devices can not efficiently remove the letter written with chalk on blackboard.
Chinese patent document application number CN201710799414.9 discloses a kind of disposable wiper blackboard eraser, is in box body
Upper end be equipped with supporting plate, supporting plate is equipped with velcro, and velcro is adhesively fixed on supporting plate, is fixed as one with supporting plate, supporting plate
It is equipped with wiper, in use, disposable wiper is affixed directly in velcro can be used, when the chalk dust on wiper is more
When, i.e., wiper is removed from velcro, then from reel tear one piece and be sticked in velcro and continue to use, the disposable wiper
Wiping blackboard structure is simple, and processing cost is low.But the disposable wiper blackboard eraser is in the mistake for repeatedly replacing disposable wiper
Cheng Zhonghui damages velcro.
Summary of the invention:
For the above-mentioned prior art, letter written with chalk is removed the technical problem to be solved in the present invention is to provide a kind of simple and efficient
Blackboard eraser.
In order to solve the above technical problems, the interchangeable disposable cloth blackboard eraser of the present invention includes middle plate, upper cover, lower plate and wiping
Part, the polishing piece is for wiping the word that can be removed by wiping；Being formed between the upper cover and the middle plate has
The fixed cavity of the first of opening, the upper cover adjust the described first fixed cavity by rotating with one end of the middle plate
Be open bore, and the described first fixed cavity is open bore by adjusting it to maintain clamping or pine with one end of the polishing piece
The state of relaxation；The lower plate has the wiping surface facing with the word to be wiped, and the wiping surface of the lower plate is by the wiping
Wipe part to be covered, form the second fixed cavity with opening between the lower plate and the middle plate, the lower plate by with institute
The other end for stating middle plate rotates to adjust the opening bore of the described second fixed cavity, the described second fixed cavity by adjusting
It is open bore to maintain the state of clamping or relaxation with the other end of the polishing piece.
Using such interchangeable disposable cloth blackboard eraser, so that it may in the letter written with chalk on blackboard to be wiped, pass through increase
The both ends of polishing piece can be individually positioned in the first fixed appearance by the opening bore of the first fixed cavity and the second fixed cavity
In chamber, the second fixed cavity, and the wiping surface of polishing piece covering lower plate, the dismounting of polishing piece is thus completed, at this time first
The both ends of fixed cavity and the second fixed cavity and polishing piece are in relaxed state；Again by reducing the first fixed cavity and second
The opening bore of fixed cavity, so that the both ends of the first fixed cavity and the second fixed cavity and polishing piece are in and mutually clamp
State, blackboard eraser at this time can normal use；Wherein, the opening bore adjustment of the first fixed cavity and the second fixed cavity
It is the realization that rotated respectively with upper cover, lower plate by the both ends of middle plate；It, can be by powder by polishing piece when wiping letter written with chalk
Word is removed clean.
As the improvement of the interchangeable disposable cloth blackboard eraser of the present invention, it is additionally arranged fixed plate, two and half ring sets, two rotating members
With flexible U-shaped fixing buckle, half ring set and the U-shaped fixing buckle all have two connecting pins, the upper cover, middle plate
The stationary plane perpendicular with the wiping surface of the lower plate is all had with the lower plate, on the stationary plane of the upper cover and the lower plate
It is fixedly connected to the fixed plate, described two half ring sets are symmetricly set in the fixed plate, and half ring set
Two connecting pins are each attached in the fixed plate, so that forming two between described two half ring sets and the fixed plate symmetrically
The rotation hole of arrangement, adjacent one end of described two rotating members is connect with two connecting pins of the U-shaped fixing buckle respectively, described
The other end of two rotating members is inserted into the rotation hole respectively and can rotate in the rotation hole, and the middle plate is consolidated
Determine to be fixedly connected with protrusion on face, be rotated in the rotation hole along with the rotating member, the U-shaped fixing buckle can rotate
To being fastened in the protrusion, the bonding strength of middle plate and upper cover, lower plate is improved, disposable cloth further is secured.
For the present invention have fixed plate interchangeable disposable cloth blackboard eraser, the polishing piece be disposable cloth, described one
There is secondary property cloth head, the cleaning part of the wiping word and tail portion, the cleaning part of the disposable cloth to be located at the disposable cloth
Head and the disposable cloth tail portion between, the cleaning part of the disposable cloth covers the wiping surface of the lower plate, described
First fixed cavity, described second fix the tail portion that cavity can respectively with the head of the disposable cloth, the disposable cloth
In the state for mutually clamping or relaxing.Using such interchangeable disposable cloth blackboard eraser, so that it may the powder on blackboard to be wiped
When word, by increasing the opening bore of the first fixed cavity and the second fixed cavity, the cleaning part of disposable cloth is covered in
The tail portion on the head of disposable cloth, disposable cloth is individually positioned in the first fixed cavity, the second fixed appearance by the wiping surface of lower plate
It is intracavitary, changeing for disposable cloth is completed, then by the way that the opening bore of cavity will be fixed by reducing the first fixed cavity and second,
So that the tail portion of the first fixed cavity, the second fixed cavity respectively with the head of disposable cloth, disposable cloth mutually clamps, to reach
To the purpose that the head of disposable cloth, the tail portion of disposable cloth is fixedly mounted, thus disposable cloth is just simply and quickly fixed pacifies
Mounted in by upper cover, lower plate and middle board group at blackboard eraser body on；It is by disposable cloth here by chalk when wiping letter written with chalk
Word is removed clean；Such interchangeable disposable cloth blackboard eraser can with simple and efficient remove letter written with chalk on blackboard.
There is the interchangeable disposable cloth blackboard eraser of this disposable cloth, the present invention skill further to be solved for the present invention
Art problem is to provide a kind of interchangeable disposable cloth blackboard eraser that can be more fixed the tail portion of disposable cloth, for this purpose, for upper
The interchangeable disposable cloth blackboard eraser stated can be added and hook arm and compress spring, and the interchangeable disposable cloth blackboard eraser further includes hooking
Arm and compress spring, described one end for hooking arm are mutually fixedly connected with one end of the compress spring, have and institute on the middle plate
It states and hooks the hook slot that arm matches and is located in the described second fixed cavity, have in the lower plate and matched with the compress spring
And it is located at the spring installation groove in the described second fixed cavity, the other end and the spring mounting groove of the compress spring
There are the installation gaps of the tail portion for installing the disposable cloth between slot bottom, when installing the tail portion of disposable cloth, as long as will
It is mounted on installation gap location, and when the second fixed cavity is closed, middle plate applies pressure, compress spring to compress spring by hooking arm
Disposable cloth can be squeezed, so that the tail portion of disposable cloth can be more fixed by the interchangeable disposable cloth blackboard eraser of the present invention.
As a further improvement of the present invention, the both ends of the middle plate pass through hinge with the upper cover, the lower plate respectively
Mechanism connection, the both ends for realizing middle plate rotate with upper cover, lower plate respectively.
Both ends for the present invention with this middle plate are connect with upper cover, lower plate by linkage interchangeable primary respectively
Property cloth blackboard eraser, the linkage includes hinge ontology and rotary shaft, and the rotary shaft passes through the hinge ontology, the conjunction
Leaf ontology provides a kind of both ends point of middle plate for the both ends of the middle plate to be connected with the upper cover, the lower plate respectively
The specific structure not rotated with upper cover, lower plate, the linkage structure are simple, quick for installation.
It include the interchangeable disposable cloth blackboard eraser of the linkage of rotary shaft for the present invention, it can be in the rotary shaft
It is set with connecting spring, the connecting spring tool is fixedly connected with there are two linking arm on the both ends end face of the middle plate
One of linking arm of connecting spring is stated, and the upper cover and the lower plate are corresponding with the both ends end face of the middle plate
Be fixedly connected to another linking arm of the connecting spring on face, two linking arms of connecting spring be middle plate and upper cover,
The folding of lower plate provides pretightning force, further fixes disposable cloth.
It include the interchangeable disposable cloth blackboard eraser of the linkage of rotary shaft for the present invention, it can be in the rotary shaft
It is fixedly connected with and is used to limit the mobile locating part of the rotary shaft positioned at the two sides of the hinge ontology, locating part can prevent
The interchangeable disposable cloth blackboard eraser causes rotary shaft to be subjected to displacement during being used for multiple times.
The further improvement of another kind as the interchangeable disposable cloth blackboard eraser of the present invention, is additionally arranged sponge cloth, described
Sponge cloth is fixedly connected on the bottom surface and side of the lower plate and between the lower plate and the disposable cloth, thus increases
Big frictional force between lower plate and disposable cloth, prevent disposable cloth cleaning part and lower plate relative motion and cause primary
The damage of property cloth.
There is the interchangeable disposable cloth blackboard eraser of above-mentioned various upper covers for the present invention, the middle plate is equipped with positioned at described
Convex body in second fixed cavity, the lower plate, which is equipped with, to be matched and is located at the convex body in the described second fixed cavity
Groove improves the durability and stability of the interchangeable disposable cloth blackboard eraser so that the connection of middle plate and lower plate is closer.
There is lower plate to be equipped with the present invention to match and fix positioned at second interchangeable primary in cavity with convex body
Property cloth blackboard eraser, be additionally arranged sponge cloth and continuous cloth, the sponge cloth is fixedly connected on the wiping surface and stationary plane of the lower plate
And between the lower plate and the disposable cloth, the frictional force between lower plate and disposable cloth is thereby increased, is prevented
Cleaning part and the lower plate relative motion of disposable cloth and the damage for causing disposable cloth；The middle plate, which has, to be secured to face and mutually hangs down
Joint face that is straight and being located in the described second fixed cavity, the upper cover also have the face of being secured to perpendicular and are located at described the
Joint face in one fixed cavity, the silk floss cloth are fixedly connected on the joint face of the middle plate except the hook slot and the convex body
The joint face of part and the upper cover in addition, the cotton are that upper cover is mentioned with middle plate and lower plate with the disposable cloth of middle board clamping
For frictional force, disposable cloth is further fixed.
Compared with prior art, beneficial effects of the present invention: chalk is wiped using the interchangeable disposable cloth blackboard eraser of the present invention
When word, do not need to fix a fritter sponge cloth on one piece of plank and by traditional blackboard eraser by replacing rich in electrostatic adsorption force
Wiping causing efficiently remove letter written with chalk like that, do not need to emit using velcro and there are velcro to be used for multiple times yet
It is risk of damage to, directly by the extruding and shape of both the top surface of the middle plate of the fixed cavity of formation first and the bottom surface of upper cover
Reach at the extruding of both the top surface of the bottom surface and lower plate of the middle plate of the second fixed cavity be fixedly mounted disposable cloth head,
The purpose of the tail portion of disposable cloth, thus disposable cloth be just simply and quickly fixedly mounted on by upper cover, lower plate and middle board group at
Blackboard eraser body on, changeing for disposable cloth is also the same convenient, and furthermore disposable cloth itself can neatly remove chalk
Word, therefore, simple and efficient during entire blackboard eraser wiping letter written with chalk.
Detailed description of the invention:
Attached drawing is used to provide to further understand the present invention, and constitutes part of specification, with implementation of the invention
Example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is perspective view of the present invention in the case where changeing disposable cloth state；
Fig. 2 is the connection schematic diagram for hooking arm and compress spring in lower plate；
Fig. 3 is the connection schematic diagram of connecting spring and protrusion on middle plate；
Fig. 4 is the structural schematic diagram of disposable cloth；
Fig. 5 is the connection schematic diagram for hooking arm and compress spring；
Fig. 6 is the connection schematic diagram of U-shaped fixing buckle and protrusion；
Fig. 7 is the connection schematic diagram of upper cover and middle plate；
Fig. 8 is the front view of interchangeable disposable cloth blackboard eraser shown in Fig. 1；
Fig. 9 is the stereoscopic schematic diagram of the present invention in a state of use；
Appended drawing reference: 1, upper cover；2, middle plate；3, lower plate；4, disposable cloth；41, head；42, cleaning part；43, tail portion；5,
Hinge ontology；6, rotary shaft；7, the first fixed cavity；8, the second fixed cavity；9, connecting spring；10, stop collar；11, arm is hooked；
12, compress spring；13, slot is hooked；14, spring installation groove；15, gap is installed；16, raised；17, fixed plate；18, half ring set；
19, rotation hole；20, cylindrical bar；21, U-shaped fixing buckle；22, sponge cloth；23, convex body；24, groove；25, continuous cloth.
Specific embodiment:
As Fig. 1-9 shows the embodiment of the interchangeable disposable cloth blackboard eraser of the present invention.
As shown in Figure 1, entire interchangeable disposable cloth blackboard eraser includes upper cover 1, middle plate 2, lower plate 3 and disposable cloth 4, this one
Polishing piece of the secondary property cloth 4 as wiping letter written with chalk.
Wherein, as shown in figure 4, the disposable cloth 4 is preferably with head 41, the cleaning part 42 of wiping letter written with chalk and tail portion
43, cleaning part 42 is between head 41 and tail portion 43.
As shown in FIG. 7 and 8, the upper end of middle plate 2 is connected with the hinge ontology 5 of upper cover 1, is interspersed on hinge ontology 5
Rotary shaft 6, aforementioned connection type are applied equally to the connection between the lower end and lower plate 3 of middle plate 2, that is, use hinge ontology 5
The lower end of middle plate 2 is connected with lower plate 3, and is interspersed with rotary shaft 6 on hinge ontology 5, thus the both ends of middle plate 2 pass through respectively
The linkage being made of hinge ontology 5 and rotary shaft 6 can rotate with upper cover 1, lower plate 3, shape between middle plate 2 and upper cover 1
At the first with opening fixed cavity 7, upper cover 1 adjusts opening for the first fixed cavity 7 by rotating with the upper end of middle plate 2
Mouthful bore, the first fixed cavity 7 are open bore by adjusting it to maintain clamping or relaxation with the head 41 of disposable cloth 4
State；The second fixed cavity 8 with opening is formed between middle plate 2 and lower plate 3, lower plate 3 with the lower end of middle plate 2 by rotating
Adjust the opening bore of the second fixed cavity 8, the second fixed cavity 8 is by adjusting its be open bore and disposable cloth 4
Tail portion 43 maintains the state of clamping or relaxation.
As shown in figure 9, to assemble the interchangeable disposable cloth blackboard eraser for wipe letter written with chalk when, by the wiping of disposable cloth
The bottom surface that portion 42 is covered in lower plate 3 is wiped, the bottom surface of the lower plate 3 is as the wiping surface facing with letter written with chalk to be wiped, by one
The head 41 of secondary property cloth, the tail portion 43 of disposable cloth are individually positioned in the fixed cavity 8 of the first fixed cavity 7, second, pass through by
Upper cover 1 and lower plate 3 are turned to cover with middle plate 2 and be closed, so that the first fixed cavity 7 and the second fixed cavity 8 are in closed state,
The extruding of both the top surface of the middle plate 2 of cavity 7 and the bottom surface of upper cover 1 is fixed by formation first and forms the second fixed cavity
The extruding of both the bottom surface of 8 middle plate 2 and the top surface of lower plate 3 and reach the head 41 for gripping disposable cloth, disposable cloth
Tail portion 43 purpose, thus disposable cloth 4 be just simply and quickly fixedly mounted on by upper cover 1, middle plate 2 and 3 three of lower plate it
Between；When wiping letter written with chalk, letter written with chalk can be removed by disposable cloth 4 clean；When needing to change disposable cloth 4, as long as
It crosses to turn to upper cover 1 and lower plate 3 and be separated with middle plate 2, so that the first fixed cavity 7 and the second fixed cavity 8 are in opening
State, cloth 4 disposable in this way and the first fixed cavity 7 and the second fixed cavity 8 are at relaxed state, can take out one at this time
Secondary property cloth 4；The frame that the interchangeable disposable cloth blackboard eraser is made of when carrying out changeing disposable cloth 4 upper cover 1, middle plate 2 and lower plate 3
Body is in zigzag, and interchangeable disposable cloth blackboard eraser frame body in normal operating condition is in cuboid；It can in order to improve this
The whole comfort level when holding of disposable cloth blackboard eraser is changed, and because holding part is contacted with the top surface of upper cover 1 and side,
It under the circumstances, can be by the smooth circular sliding slopes in the top surface of the upper cover 1 and side；It is such interchangeable primary as a result,
Property cloth blackboard eraser can with simple and efficient remove letter written with chalk on blackboard.
As shown in fig. 7, in order to further fix disposable cloth 4, it can take and be opened for middle plate 2 and upper cover 1, lower plate 3
It closes and the measure of pretightning force is provided, i.e., be set with connecting spring 9, and linking arm there are two the tools of connecting spring 9 in rotary shaft 6,
One of linking arm of connecting spring 9 is fixedly connected on the upper and lower end side of middle plate 2, another connection of connecting spring 9
Arm is fixedly connected on upper cover 1 and lower plate 3 on side corresponding with the upper and lower end side of middle plate 2.In order to prevent this interchangeable one
Secondary property cloth blackboard eraser causes rotary shaft 6 to be subjected to displacement during being used for multiple times, and is fixedly connected with to be located in rotary shaft 6 and close
The two sides of leaf ontology 5 are used to limit the mobile stop collar 10 of rotary shaft 6, it should be noted that the mobile not office of limitation rotary shaft 6
It is limited to stop collar 10, it is close with 10 function of stop collar and can also limit the component of the mobile effect of rotary shaft and come is also possible to other
Instead of, such as in convex block, the movement of convex block is limited using hinge ontology 5, achieve the purpose that limit mobile to rotary shaft.
As shown in Fig. 2,5 and 8, in order to further fix the tail portion 43 of disposable cloth, it is arranged in the second fixed cavity 8
Have and hook arm 11 and compress spring 12, be mutually fixedly connected in the bottom surface for hooking arm 11 with the upper end of compress spring 12, on middle plate 2 with by
The bottom surface of middle plate 2 to the top surface direction of middle plate 2 be recessed it is being formed and with hook the hook slot 13 that matches of arm 11, certain hook slot 13
It is recessed formed and and compress in having in the second fixed cavity 8, in lower plate 3 from the top surface of lower plate 3 to the bottom surface direction of lower plate 3
The spring installation groove 14 that spring 12 matches, the right spring installation groove 14 also are located in the second fixed cavity 8, compress spring
There are the installation gaps 15 of the tail portion 43 for installing disposable cloth between 12 lower end and the bottom surface of spring mounting groove 14, in this way
The installation path of entire disposable cloth be successively the bottom surface Jing Guo spring installation groove 14, spring installation groove 14 side, under
The top surface of plate 3, the right side of lower plate 3, the bottom surface of lower plate 3, the left side of lower plate 3, middle plate 2 top surface, thus also just in order
Correspondingly complete the installation 43 on the head 41, cleaning part 42, tail portion 43 of disposable cloth.It is disposable in order to more steadily push down
The compress spring 12 is preferably arranged three or even three or more by cloth 4, and others quantity is also possible certainly；In order to more
Add and is steadily put into spring installation groove 14, is formed with compress spring 12 and well contact and prevent compress spring 12 to disposable
The tail portion 43 of cloth presses excessive damage disposable cloth 4, apart from one li of its lower end preferably on the tail portion of the disposable cloth 43
The double thickness for being partially folded into other region parts on the disposable cloth 4 in rice region, by the tail portion 43 of the disposable cloth
On the installation gap 15 that is partially disposed in apart from its one cm section of lower end, and the gap size in the installation gap 15 with should
The thickness of part on the tail portion 43 of disposable cloth apart from its one cm section of lower end is identical.
As seen in figs. 6 and 8, it in order to further fix disposable cloth 4, takes and connect middle plate 2 more with upper cover 1, lower plate 3
Add firm measure, i.e., is fixedly connected to protrusion 16, the front and back of upper cover 1 and lower plate 3 on the front and back in middle plate 2
The slicer board of cuboid and irony is bolted on face, using the cuboid and the slicer board of irony is as fixed plate
17, naturally it is also possible to be fixedly connected with mode as welding using other, fixed on the slicer board there are two symmetrical
Half ring set 18, there are two connecting pins for half ring set 18 tool, and two connecting pins of two and half ring sets 18 are each attached on slicer board,
So that forming two rotation holes 19 being arranged symmetrically between two and half ring sets 18 and slicer board, it is fitted in two rotation holes 19
Cylindrical bar 20, the cylindrical bar 20 can rotate in the rotation hole 19, adjacent one end of two cylindrical bars 20 be connected with jointly by
U-shaped fixing buckle 21 made of elastic material rotates in rotation hole 19 along with cylindrical bar 20, and U-shaped fixing buckle 21 can rotate
To being fastened in protrusion 16, the rotating member which rotates as U-shaped fixing buckle 21 relative to half ring set 18, the wherein cylinder
Bar 20 can be integrally formed with U-shaped fixing buckle 21, and entire design structure is simple, install convenient.
In fig. 8, in order to increase the frictional force between lower plate 3 and disposable cloth 4 and prevent the wiping of disposable cloth
It wipes portion 42 and 3 relative motion of lower plate and causes the damage of disposable cloth 4, on the bottom surface and side of lower plate 3 and be located at 3 He of lower plate
It is pasted between disposable cloth 4 and is fixed with sponge cloth 22.
As shown in Fig. 2,3 and 8, in order to improve the durability and stability of the interchangeable disposable cloth blackboard eraser, take by
The closer measure of the connection of plate 2 and lower plate 3, i.e., be equipped with convex body 23 in the bottom surface of middle plate 2, which both can be with middle plate 2
Bottom surface it is integrally formed, be also possible to independent component, have the bottom surface direction from the top surface of lower plate 3 to lower plate 3 recessed in lower plate 3
Groove 24 that is being formed and matching with convex body 23 is fallen into, the convex body 23 and groove are respectively positioned in the second fixed cavity 8.
As shown in figure 8, in order to clamp disposable cloth 4 for upper cover 1 and middle plate 2 and lower plate 3 and middle plate 2 and provide frictional force,
Achieve the purpose that further fixed disposable cloth 4, the part on the bottom surface of middle plate 2 in addition to the hook slot 13 and convex body 23
And the bottom surface of the upper cover 1 pastes and is fixed with continuous cloth 25.
As shown in figure 4, in order to which the head 41 of disposable cloth can be more entirely put into the first fixed cavity 7, especially
It can be designed to the partial sector at left and right sides of it head 41 of disposable cloth to extension in this on top surface of plate 2
It stretches, so that the transverse width of the left and right sides section after extending is greater than cleaning part 42 and the tail portion 43 of disposable cloth, certainly by one
The head 41 of secondary property cloth, which is designed to extend outwardly whole sections at left and right sides of it, can also reach said effect.
The technical means disclosed in the embodiments of the present invention is not limited to the technical means disclosed in the above technical means, and further includes
The technical solution as composed by the above technical characteristic equivalent replacement.Unaccomplished matter of the invention, belongs to those skilled in the art's
Common knowledge.
Claims (10)
1. a kind of interchangeable disposable cloth blackboard eraser characterized by comprising
Middle plate；
Form the first fixed cavity with opening between upper cover, with the middle plate, the upper cover by with the middle plate
One end rotates to adjust the opening bore of the described first fixed cavity, and the described first fixed cavity is by adjusting its bore that is open
To maintain the state of clamping or relaxation with one end of polishing piece；
Lower plate has the wiping surface facing with word to be wiped, and the wiping surface of the lower plate is covered by polishing piece, under described
The second fixed cavity with opening is formed between plate and the middle plate, the lower plate with the other end phase of the middle plate by turning
Move to adjust the opening bore of the described second fixed cavity, the described second fixed cavity by adjusting its be open bore with it is described
The other end of polishing piece maintains the state of clamping or relaxation.
2. interchangeable disposable cloth blackboard eraser according to claim 1, it is characterised in that: the interchangeable disposable cloth blackboard eraser
It further include fixed plate, two and half ring sets, two rotating members and flexible U-shaped fixing buckle, half ring set and the U-shaped are solid
Fixed button all has two connecting pins, and the upper cover, middle plate and the lower plate all have perpendicular with the wiping surface of the lower plate
The fixed plate is fixedly connected on the stationary plane of stationary plane, the upper cover and the lower plate, described two half ring sets are symmetrical
It is arranged in the fixed plate, and two connecting pins of half ring set are each attached in the fixed plate, so that described two
Two rotation holes being arranged symmetrically, adjacent one end difference of described two rotating members are formed between a half ring set and the fixed plate
It is connect with two connecting pins of the U-shaped fixing buckle, the other end of described two rotating members is inserted into respectively in the rotation hole
And can be rotated in the rotation hole, it is fixedly connected with protrusion on the stationary plane of the middle plate, is existed along with the rotating member
Rotation in the rotation hole, the U-shaped fixing buckle, which can turn to, to be fastened in the protrusion.
3. interchangeable disposable cloth blackboard eraser according to claim 2, it is characterised in that: the polishing piece is disposable cloth,
The disposable cloth has head, the cleaning part of the wiping word and tail portion, and the cleaning part of the disposable cloth is located at described one
Between the head of secondary property cloth and the tail portion of the disposable cloth, the cleaning part of the disposable cloth covers the wiping of the lower plate
Face, the first fixed cavity, the second fixed cavity can respectively with the head of the disposable cloth, the disposable cloth
Tail portion be in mutually clamp or relaxation state.
4. interchangeable disposable cloth blackboard eraser according to claim 3, it is characterised in that: the interchangeable disposable cloth blackboard eraser
It further include hooking arm and compress spring, described one end for hooking arm is mutually fixedly connected with one end of the compress spring, on the middle plate
With the hook slot for matching and being located in the described second fixed cavity with the hook arm, have and the compress bullet in the lower plate
The spring installation groove that spring matches and is located in the described second fixed cavity, the other end and the spring of the compress spring
There are the installation gaps of the tail portion for installing the disposable cloth between the slot bottom of mounting groove.
5. interchangeable disposable cloth blackboard eraser according to claim 1, it is characterised in that: the both ends of the middle plate respectively with institute
State upper cover, the lower plate is connected by linkage.
6. interchangeable disposable cloth blackboard eraser according to claim 5, it is characterised in that: the linkage includes hinge sheet
Body and rotary shaft, the rotary shaft pass through the hinge ontology, the hinge ontology be used for by the both ends of the middle plate respectively with
The upper cover, the lower plate are connected.
7. interchangeable disposable cloth blackboard eraser according to claim 6, it is characterised in that: be set with connection in the rotary shaft
Spring, connecting spring tool are fixedly connected to the connecting spring on the both ends end face of the middle plate there are two linking arm
One of linking arm, and the upper cover and the lower plate are fixed on face corresponding with the both ends end face of the middle plate
It is connected with another linking arm of the connecting spring.
8. interchangeable disposable cloth blackboard eraser according to claim 6, it is characterised in that: be fixedly connected in the rotary shaft
It is used to limit the mobile locating part of the rotary shaft positioned at the two sides of the hinge ontology.
9. interchangeable disposable cloth blackboard eraser described according to claim 1-any one of 8, it is characterised in that: the middle plate
It is equipped with the convex body being located in the described second fixed cavity, the lower plate, which is equipped with, matches with the convex body and be located at described the
Groove in two fixed cavities.
10. interchangeable disposable cloth blackboard eraser according to claim 9, it is characterised in that: the interchangeable disposable cloth blackboard
Wiping further includes sponge cloth and continuous cloth, and the sponge cloth is fixedly connected on the wiping surface and stationary plane of the lower plate and is located at described
Between lower plate and the disposable cloth, the middle plate has the face that is secured to perpendicular and is located in the described second fixed cavity
Joint face, the joint face that the upper cover also has the face of being secured to perpendicular and is located in the described first fixed cavity, the silk floss
Cloth is fixedly connected on the part on the joint face of the middle plate in addition to the hook slot and the convex body and the company of the upper cover
Junction.
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| CN201910576847.7A CN110202986B (en) | 2019-06-28 | 2019-06-28 | Disposable blackboard eraser capable of changing cloth |
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| CN201910576847.7A CN110202986B (en) | 2019-06-28 | 2019-06-28 | Disposable blackboard eraser capable of changing cloth |
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