CN2160555Y - Dust-free blackboard eraser - Google Patents
Dust-free blackboard eraser Download PDFInfo
- Publication number
- CN2160555Y CN2160555Y CN 93216781 CN93216781U CN2160555Y CN 2160555 Y CN2160555 Y CN 2160555Y CN 93216781 CN93216781 CN 93216781 CN 93216781 U CN93216781 U CN 93216781U CN 2160555 Y CN2160555 Y CN 2160555Y
- Authority
- CN
- China
- Prior art keywords
- blackboard
- friction wheel
- dust
- housing
- working shaft
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a dust-free blackboard eraser. The adopted technical proposal is to make use of the friction force when erasing the blackboard to drive the relevant mechanisms to work. The utility model is mainly composed of a friction wheel (7), a drive device, a working shaft (3), an erasing piece (8) and a housing (1) with a rear lid (2). The erasing piece is produced by the soft materials, such as the felt, the rubber, and is arranged on the working shaft. The edge of the friction wheel bulges out the surface of the housing, when erasing the blackboard, the friction wheel is contacted with the blackboard and rotates for the friction force between the friction wheel and the blackboard. The working shaft and the friction wheel are connected through the drive mechanism, and the drive mechanism can adopt the existing various mechanical constructions, such as gear wheels, crank link mechanisms. The utility model has the advantages of simple structure, reliable use and being suitable for full scale production.
Description
The utility model relates to a kind of blackboard eraser, belongs to teaching aid.
Present widely used blackboard eraser has the same shortcoming of knowing of many institutes---produce a large amount of dust.Chalk powder has obtained the attention of the whole society to the influence of teacher's health and teaching environment, there are some to be used to reduce the design of the blackboard eraser of dust at present, but not that effect is undesirable, be exactly that structure is too complicated, be difficult to extensive popularization, such as a kind of dust absorption blackboard eraser is arranged, adopt the principle of similar dust catcher, drive whole system work by battery, this design can't be applied because cost is too high.
The purpose of this utility model is to provide a kind of novel blackboard eraser that reduces dust.
Friction when the technical scheme that the utility model adopted erases the board for utilizing drives associated mechanisms work.The utility model mainly is made up of friction wheel (7), transmission device, working shaft (3), the housing (1) wiping sheet (8) and have bonnet (2).The wiping sheet is that soft materials such as felt, rubber are made, and is installed on the working shaft.The edge of friction wheel protrudes from surface of shell, and when erasing the board, friction wheel contacts with blackboard, owing to and blackboard between friction rotate.Be connected by transmission mechanism between working shaft and the friction wheel, transmission mechanism can be selected existing various frame for movements for use, and such as gear, toggle etc., its effect mainly contains 2 points: the first, and the rotation of friction wheel is delivered to working shaft drives the working shaft transmission.The second, should there be chronotropic action in this mechanism, makes to wipe between sheet and the blackboard to produce relative faster friction.
By technique scheme, wiping sheet can wipe the writing on the blackboard, and the chalk powder of wiping taken in the housing, make it and to leak, housing is provided with bonnet, when accumulating more chalk powder in the housing, can open bonnet and clear up, for making chalk powder be brought into housing fully and no longer being taken out of, be provided with protruding beam (9) in the utility model housing or the bonnet, be used to pull out the chalk powder that is bonded on the wiping sheet, simultaneously, can upset the air-flow in the housing, prevent that air-flow from taking chalk powder out of housing, also can have chemical ﹠ blended fabric (4) in the housing of device described in the utility model or the bonnet, utilize the suction-operated of the static that produces in the friction, leak to prevent chalk powder.
Press the product that the utility model is produced, except that the dust that can effectively reduce when erasing the board, also have advantage simple in structure, sturdy and durable, lightweight.
Describe the principle of structure of the present utility model in detail below in conjunction with embodiment.
Fig. 1: structural representation of the present utility model.
The A-A profile of Fig. 2: Fig. 1.
The B-B profile of Fig. 3: Fig. 1.
Among the figure: 1: housing; 2: bonnet; 3: working shaft; 4: chemical ﹠ blended fabric; 5: pinion; 6: gear wheel; 7: friction wheel; 8: wipe sheet; 9: protruding beam.
Be provided with 4 friction wheels (7) in this example altogether and drive same working shaft (3) rotation simultaneously, be connected with gear wheel (6) transmission device by pinion (5) between working shaft and the friction wheel, friction wheel directly drives pinion on the working shaft by gear wheel, two gear diameters are than being 2:1, in other words, the rotating speed of working shaft is 2 times of friction rotating speed, turn to just opposite, so, wipe sheet 3 times relative to the speed of the blackboard friction speed that to be blackboard eraser move with respect to blackboard, such speed enough erase on the blackboard writing and will smear under chalk powder involve in the housing.Bus along working shaft is provided with four felts as wiping sheet.This routine middle shell bonnet inboard is provided with two protruding beams (9) that are parallel to working shaft, and it is suitable that this protruding depth of beam will be selected, the too short chalk powder that can not bullet falls on the felt, the too Gao Yihui rotation of axle that hinders one's work.Also between two protruding beams, be provided with a chemical ﹠ blended fabric (4) in this enforcement, in the process that erases the board, produce static after this chemical ﹠ blended fabric is rubbed, can hold chalk powder, thereby reach the fruit of dust suction.
Claims (5)
1, a kind of dust-free black board eraser, it is characterized in that it by housing 1, have working shaft 3, friction wheel 7 and the transmission device of wiping sheet 8 and form.
2, dust-free black board eraser as claimed in claim 1 is characterized in that having on the housing bonnet 2.
3, dust-free black board eraser as claimed in claim 1 is characterized in that wiping sheet and adopts felt to make.
4, dust-free black board eraser as claimed in claim 1 is characterized in that housing or bonnet inboard are provided with protruding beam 9.
5, dust-free black board eraser as claimed in claim 1 is characterized in that in housing or the bonnet with chemical ﹠ blended fabric 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93216781 CN2160555Y (en) | 1993-06-29 | 1993-06-29 | Dust-free blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93216781 CN2160555Y (en) | 1993-06-29 | 1993-06-29 | Dust-free blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2160555Y true CN2160555Y (en) | 1994-04-06 |
Family
ID=33796872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93216781 Expired - Fee Related CN2160555Y (en) | 1993-06-29 | 1993-06-29 | Dust-free blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2160555Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984933A (en) * | 2017-12-23 | 2018-05-04 | 王昊辰 | A kind of application method of portable environmental-protection blackboard eraser |
| CN108045135A (en) * | 2017-12-23 | 2018-05-18 | 王昊辰 | A kind of portable environmental-protection blackboard eraser |
-
1993
- 1993-06-29 CN CN 93216781 patent/CN2160555Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984933A (en) * | 2017-12-23 | 2018-05-04 | 王昊辰 | A kind of application method of portable environmental-protection blackboard eraser |
| CN108045135A (en) * | 2017-12-23 | 2018-05-18 | 王昊辰 | A kind of portable environmental-protection blackboard eraser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Ning Chungang Wu Hao Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |