CN201077293Y - Modified blackboard eraser - Google Patents
Modified blackboard eraser Download PDFInfo
- Publication number
- CN201077293Y CN201077293Y CNU2007201386137U CN200720138613U CN201077293Y CN 201077293 Y CN201077293 Y CN 201077293Y CN U2007201386137 U CNU2007201386137 U CN U2007201386137U CN 200720138613 U CN200720138613 U CN 200720138613U CN 201077293 Y CN201077293 Y CN 201077293Y
- Authority
- CN
- China
- Prior art keywords
- roller
- downy
- fine hair
- hair roller
- friction wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an improved blackboard eraser, comprising a casing, a downy roller and a plurality of scrapers. The utility model is characterized in that: the downy roller is horizontally arranged in the centre part of the casing, and two driven friction wheels are respectively fixedly connected on the both sides of the downy roller, and the both ends of the downy roller are respectively arranged on the left sidewall and the right sidewall of the casing; two scrapers are symmetrically arranged on the front inner wall and the back inner wall of the casing above the downy roller; the surfaces of the two scrapers are respectively parallel with the shaft of the downy roller, and the lower ends of the two scrapers are respectively contacted with the upper surface of the downy roller, and a close dust chamber is formed by the upper surface of the downy roller, the two scrapers and the top of the casing; a front driving friction wheel and a back driving friction wheel are respectively symmetrically arranged on the left sidewall and the right sidewall of the casing at the front side and the back side of the downy roller, and are respectively contacted with the driven friction wheels; the diameters of the front driving friction wheel and the back driving friction wheel are smaller than the downy roller. The utility model has the advantages of simple structure, easy manufacture, effectively erasing chalk writings on the blackboard and then collecting the dusts, eliminating the dusty phenomenon and ensuring teachers and students healthy.
Description
Technical field
The utility model belongs to the improvement of wiping blackboard structure, particularly improved blackboard eraser.
Background technology
At present, blackboard eraser commonly used all is under a little plank or plastic plate fur-felt to be set, with hand-held blackboard eraser on blackboard back and forth wiping just letter written with chalk can be wiped.Though it is simple in structure, easy to use, the phenomenon of dust from flying often takes place in wiping the process of letter written with chalk, if things go on like this, make teachers and students get illnesss such as pneumoconiosis easily, it is healthy to influence teachers and students.
The utility model content
The purpose of this utility model is to provide a kind of improved blackboard eraser, and is not only simple in structure, is easy to make, and can wipes the letter written with chalk on the blackboard effectively and dust collected, and eliminates the dust from flying phenomenon, guarantees that teachers and students are healthy.
The purpose of this utility model is achieved in that a kind of improved blackboard eraser, comprise housing, in the middle part of housing, be horizontally disposed with a fine hair roller, fine hair roller both sides respectively affixed driven friction pulley, the two ends of fine hair roller roll shaft are installed in respectively on the housing and arranged on left and right sides wall; Be symmetrical arranged scraper plate on the forward and backward inwall of housing of fine hair roller top, the plate face of two scraper plates parallels with the axis of fine hair roller, the lower end of two scraper plates contacts with the top roll surface of fine hair roller respectively, constitutes the dust storage chamber of sealing between the top roll surface of fine hair rod, two scraper plates and the housing top wall; Be symmetrical arranged forward and backward active friction wheel respectively on the left and right wall of housing of the forward and backward both sides of fine hair roller, forward and backward active friction wheel all contacts with driven friction pulley, and the diameter of forward and backward active friction wheel is less than the diameter of fine hair roller.
When the utility model uses, with its wiping back and forth on blackboard, just can drive driven friction pulley and order about the rotation of fine hair roller then, by the fine hair roller letter written with chalk be adhered to and wipe, by scraper plate dust be scraped off again simultaneously and leaves concentratedly in dust storage chamber by front or rear active friction wheel.Because the diameter of forward and backward active friction wheel, just can guarantee the fine hair roller so all the time less than the diameter of fine hair roller and contact with blackboard surface with preceding active friction wheel or back active friction wheel, thereby improve erasure rate when wiping letter written with chalk.The utility model is simple in structure, is easy to make, and can wipe the letter written with chalk on the blackboard effectively and dust collected, and eliminates the dust from flying phenomenon, guarantees that teachers and students are healthy.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 looks cross-sectional view for master of the present utility model;
Fig. 2 is a plan structure schematic diagram of the present utility model.
The specific embodiment
A kind of improved blackboard eraser as shown in Figure 1 and Figure 2, comprises housing, and handle 4 is being set on the housing end face.Housing is plastic casing or rubber shell or Stainless Steel Shell.Be horizontally disposed with a fine hair roller 3 in the middle part of housing, the uniform fine hair that is being provided with on the surface of fine hair roller 3 is in order to wipe the letter written with chalk on the blackboard.Fine hair roller 3 both sides respectively affixed driven friction pulley 2, the two ends of fine hair roller roll shaft are installed in respectively on the housing and arranged on left and right sides wall; Be symmetrical arranged scraper plate 7 on the forward and backward inwall of housing of fine hair roller 3 tops, the plate face of two scraper plates 7 parallels with the axis of fine hair roller 3, the lower end of two scraper plates 7 contacts with the top roll surface of fine hair roller 3 respectively, scraper plate 7 is set draws in order to the dust that will adhere on the fine hair roller 3.Constitute the dust storage chamber 5 of sealing between the top roll surface of fine hair rod 3, two scraper plates 7 and the housing top wall,, prevent that chalk dust from flying upward everywhere in order to collect chalk dust.Be symmetrical arranged forward and backward active friction wheel 1,6 on the left and right wall of housing of fine hair roller 3 forward and backward both sides respectively, forward and backward active friction wheel 1,6 all contacts with driven friction pulley 2.Forward and backward active friction wheel 1,6 is rubber wheel or plastic wheel.During use, with blackboard eraser front portion or rear portion to pressing down, make anterior active friction wheel 1 or rear portion active friction wheel 6 be close to blackboard surface and rotate, front portion or rear portion active friction wheel 1,6 will drive driven friction pulley 2 and order about 3 rotations of fine hair roller and wipe letter written with chalk on the blackboard like this.The diameter of forward and backward active friction wheel 1,6 makes fine hair roller 3 can not be subjected to the interference of forward and backward active friction wheel 1,6 when rotating less than the diameter of fine hair roller 3 like this, helps fine hair roller 3 and is close to the blackboard surface, improves the rate of cleaning to letter written with chalk on the blackboard.
Claims (1)
1. improved blackboard eraser, comprise housing, it is characterized in that: in the middle part of housing, be horizontally disposed with a fine hair roller (3), fine hair roller (3) both sides respectively affixed driven friction pulley (2), the two ends of fine hair roller roll shaft are installed in respectively on the housing and arranged on left and right sides wall; Be symmetrical arranged scraper plate (7) on the forward and backward inwall of housing of fine hair roller (3) top, the plate face of two scraper plates (7) parallels with the axis of fine hair roller (3), the lower end of two scraper plates (7) contacts with the top roll surface of fine hair roller (3) respectively, constitutes the dust storage chamber (5) of sealing between the top roll surface of fine hair rod (3), two scraper plates (7) and the housing top wall; On the left and right wall of housing of the forward and backward both sides of fine hair roller (3), be symmetrical arranged forward and backward active friction wheel (1), (6) respectively, forward and backward active friction wheel (1), (6) all contact with driven friction pulley (2), and the diameter of forward and backward active friction wheel (1), (6) is less than the diameter of fine hair roller (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201386137U CN201077293Y (en) | 2007-08-09 | 2007-08-09 | Modified blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201386137U CN201077293Y (en) | 2007-08-09 | 2007-08-09 | Modified blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201077293Y true CN201077293Y (en) | 2008-06-25 |
Family
ID=39569348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201386137U Expired - Fee Related CN201077293Y (en) | 2007-08-09 | 2007-08-09 | Modified blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201077293Y (en) |
-
2007
- 2007-08-09 CN CNU2007201386137U patent/CN201077293Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20090909 |