CN1075453A - Automatic blackboard eraser - Google Patents
Automatic blackboard eraser Download PDFInfo
- Publication number
- CN1075453A CN1075453A CN 91111895 CN91111895A CN1075453A CN 1075453 A CN1075453 A CN 1075453A CN 91111895 CN91111895 CN 91111895 CN 91111895 A CN91111895 A CN 91111895A CN 1075453 A CN1075453 A CN 1075453A
- Authority
- CN
- China
- Prior art keywords
- blackboard
- automatic
- blackboard eraser
- umbrella
- rectangular
- 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.)
- Pending
Links
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
A kind of blackboard eraser that can automatic blackboard cleaning, it is the top that a rectangular blackboard is fixed on two automatic poles, the end with these two automatic umbrella bars is fixed on the iron pipe again.Such one touch the button by (automatically on the umbrella umbrella bar), rectangular blackboard eraser just from the close-by examples to those far off moves along with automatic umbrella bar, just the word on the blackboard can be wiped clean.
Description
The present invention can be clean with the blackboard eraser of writing full word automatically.
At present, known blackboard eraser is not automatically, wants to wipe the word on the blackboard, must once wipe with hand, wastes time and energy.
The present invention can just can wipe the word on the blackboard as long as click knob soon without manpower., time saving and energy saving.
The object of the present invention is achieved like this:
A rectangular blackboard eraser is installed in two tops of automatic umbrella bar (can control flexible automatically) of having removed umbrella cover and having supported the thin string of umbrella cover, and the end with these two umbrella bars is fixed on the iron pipe again.Iron pipe is placed on the wall on blackboard right side (near blackboard).Like this, as long as simultaneously by the knob on two umbrella bars, bar will from the close-by examples to those far off extend, rectangular blackboard eraser is just along with from the close-by examples to those far off moving, word on the blackboard has just been wiped like this, even this time some places are not wiped clean, so when closing knob, rectangular blackboard eraser draws near again and moves, and those places of not wiped clean have also been wiped clean.
Further specify below in conjunction with drawings and Examples.
Fig. 1 closes the position of rectangular blackboard eraser when knob.
Fig. 2 is when knob is opened, the motion state of the automatic umbrella bar of rectangular blackboard scrape along.
1. blackboards among the figure, 2. rectangular blackboard eraser, 3. umbrella bar, 4. iron pipe, 5. knob automatically
Blackboard eraser 2 is positioned on 3 top of two automatic umbrella bars, and the other end of umbrella bar 3 is fixed on the iron pipe 4 automatically, iron pipe 4 is fixed near the wall the blackboard right side again.
Claims (1)
1. automatic blackboard eraser is characterized in that: rectangular blackboard eraser (suitable with blackboard length) is fixed on these two automatic umbrella umbrella bars (removed umbrella cover and supported the thin string of umbrella cover) top, and the end of two automatic poles is fixed on the iron pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111895 CN1075453A (en) | 1991-12-22 | 1991-12-22 | Automatic blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111895 CN1075453A (en) | 1991-12-22 | 1991-12-22 | Automatic blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1075453A true CN1075453A (en) | 1993-08-25 |
Family
ID=4910914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111895 Pending CN1075453A (en) | 1991-12-22 | 1991-12-22 | Automatic blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1075453A (en) |
-
1991
- 1991-12-22 CN CN 91111895 patent/CN1075453A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |