CN102910008A - Blackboard eraser - Google Patents
Blackboard eraser Download PDFInfo
- Publication number
- CN102910008A CN102910008A CN 201210440221 CN201210440221A CN102910008A CN 102910008 A CN102910008 A CN 102910008A CN 201210440221 CN201210440221 CN 201210440221 CN 201210440221 A CN201210440221 A CN 201210440221A CN 102910008 A CN102910008 A CN 102910008A
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- CN
- China
- Prior art keywords
- housing
- springs
- supporting plate
- gripper shoe
- connecting rod
- 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
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- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
The invention relates to a blackboard eraser which comprises a housing and a sponge block, and further comprises a supporting plate and two springs, wherein the sponge block is mounted on a lower plane of the supporting plate; a connecting rod is vertically mounted on the upper plane of the supporting plate; a ball head is arranged at the top end of the connecting rod; two hemispherical tiles are embedded under the housing, and form a spherical inner chamber after being combined; the physical dimension of the spherical inner chamber is matched with the size of the ball head; the ball head is movably mounted in the spherical inner chamber formed by the two hemispherical tiles; and the two springs are respectively mounted between the housing and the supporting plate, and distributed in a bilateral symmetry manner relative to the connecting rod. Since the supporting plate is movably fixed in the two hemispherical tiles through the ball head, the springs are connected between the housing and the supporting plate, the housing can rotate freely relative to the supporting plate when a blackboard is erased, and the supporting plate is always pressed on and adhered to the surface of the blackboard under the action of the springs.
Description
Technical field
The present invention relates to a kind of teaching aid, be specifically related to a kind of blackboard eraser.
Background technology
As everyone knows, blackboard eraser is a kind of teaching aid that teacher often uses, but existing blackboard eraser substantially all adopts below wooden or housing that plastics are made the directly mode of fixed installation sponge.Adopt the blackboard eraser of this kind mode in use, must firmly just can make it fully and the blackboard plane contact with respect to the blackboard plane is vertical to it, if the situation that certain corner and blackboard plane can't contact just appears in the out of plumb of exerting oneself easily, therefore teacher often needs frame arm when using ordinary blackboard eraser to erase the board it to be exerted oneself, cause easily muscular fatigue.
Summary of the invention
The present invention is in order to overcome the deficiency of above technology, the blackboard eraser that provides a kind of sponge block and blackboard to fit fully all the time.
The present invention overcomes the technical scheme that its technical problem adopts:
This blackboard eraser, comprise housing and sponge block, also include gripper shoe and two springs, described sponge block is installed on the lower plane of gripper shoe, the plane vertically is equipped with connecting rod on the described gripper shoe, the top of described connecting rod is provided with bulb, the below of described housing is inlayed two hemisphere watt is installed, has a spherical inner chamber after described two hemisphere watt merging, the appearance and size of described spherical inner chamber and the size of bulb are complementary, described bulb is movably installed in the spherical inner chamber of two hemisphere watt section bars, and described two springs are installed on respectively between described housing and the gripper shoe and two springs distribute with respect to the connecting rod left-right symmetry.
To produce skidding in order preventing from holding the blackboard eraser housing, to be separately installed with anti-skidding adhesive tape on the outer two sides of above-mentioned housing.
Dust raising phenomenon appears when erasing the board, seal the elasticity leather bag that has elasticity and have cavity in it around also being equipped with in the above-mentioned housing, the top of described elasticity leather bag be provided with its on plane contact be used for the pressure handle of extruding elasticity leather bag, described pressure handle rotatably is fixed on the housing by rotating shaft and expose with respect to the housing upper surface its upper end, also be provided with water pipe and the mouth of pipe on the described elasticity leather bag, described water pipe one end is communicated with the other end with the elasticity leather bag and is arranged in sponge block, described opening part exposes with respect to housing, and capping plug screws up and is fixed on the described mouth of pipe.
The invention has the beneficial effects as follows: because gripper shoe is to be movably fixed in two hemisphere watt by bulb, and be connected with spring between housing and the gripper shoe, so housing can freely rotate with respect to gripper shoe when erasing the board, but gripper shoe but can be pressed all the time under the effect of spring and is attached to the blackboard surface.Thereby teacher when erasing the board unlike vertically firmly guaranteeing the effect that erases the board to blackboard eraser all the time.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the water system structural representation of pressing of the present invention;
Among the figure, 1. housing 2. anti-skidding adhesive tape 3. hemisphere watt 4. pressure handles, 5. capping plugs, 6. springs, 7. bulbs, 8. connecting rods, 9. water pipes, 10. gripper shoes, 11. sponge blocks, 12. rotating shafts, 13. elasticity leather bags, 14. mouths of pipe.
The specific embodiment
Below in conjunction with accompanying drawing 1, the present invention will be further described for accompanying drawing 2.
This blackboard eraser, comprise housing 1 and sponge block 11, also include gripper shoe 10 and two springs 6, described sponge block 11 is installed on the lower plane of gripper shoe 10, the plane vertically is equipped with connecting rod 8 on the described gripper shoe 10, the top of described connecting rod 8 is provided with bulb 7, the below of described housing 1 is inlayed two hemisphere watts 3 is installed, has a spherical inner chamber after watt 3 merging of described two hemisphere, the size of the appearance and size of described spherical inner chamber and bulb 7 is complementary, described bulb 7 is movably installed in the spherical inner chamber of two hemisphere watt 3 section bars, and described two springs 6 are installed on respectively between described housing 1 and the gripper shoe 10 and two springs 6 distribute with respect to connecting rod 8 left-right symmetry.Because gripper shoe 10 is to be movably fixed in two hemisphere watts 3 by bulb 7, and be connected with spring 6 between housing 1 and the gripper shoe 10, so housing 1 can freely rotate with respect to gripper shoe 10 when erasing the board, but gripper shoe 10 but can be pressed all the time under the effect of spring 6 and is attached to the blackboard surface.Thereby teacher when erasing the board unlike vertically firmly guaranteeing the effect that erases the board to blackboard eraser all the time.
Be separately installed with anti-skidding adhesive tape 2 on the outer two sides of above-mentioned housing 1.Anti-skidding adhesive tape 2 can prevent that teacher from producing the phenomenon of skidding when holding the housing 1 of blackboard eraser, improves the stability when erasing the board.
Seal the elasticity leather bag 13 that has elasticity and have cavity in it around also being equipped with in the above-mentioned housing 1, the top of described elasticity leather bag 13 be provided with its on plane contact be used for the pressure handle 4 of extruding elasticity leather bag 13, described pressure handle 4 rotatably is fixed on the housing 1 by rotating shaft 12 and expose with respect to housing 1 upper surface its upper end, also be provided with water pipe 9 and the mouth of pipe 14 on the described elasticity leather bag 13, described water pipe 9 one ends are communicated with the other end with elasticity leather bag 13 and are arranged in sponge block 11, the described mouth of pipe 14 parts are exposed with respect to housing 1, and capping plug 5 screws up and is fixed on the described mouth of pipe 14.Can in elasticity leather bag 13, pour into running water by the mouth of pipe 14 by opening capping plug 5, again capping plug 5 be screwed up afterwards and be fixed on the mouth of pipe 14.When needs erase the board, thereby teacher can by pressing pressing plate 4 extruding elasticity leather bags 13, make sponge block 11 moistening so that the water in the elasticity leather bag 13 can be pressed in the sponge block 11.Thereby can be so that in the process that erases the board, avoid the generation of airborne dust.
Claims (3)
1. blackboard eraser, comprise housing (1) and sponge block (11), it is characterized in that: also include gripper shoe (10) and two springs (6), described sponge block (11) is installed on the lower plane of gripper shoe (10), the upper plane of described gripper shoe (10) vertically is equipped with connecting rod (8), the top of described connecting rod (8) is provided with bulb (7), the below of described housing (1) is inlayed two hemisphere watt (3) is installed, after merging, described two hemisphere watt (3) have a spherical inner chamber, the size of the appearance and size of described spherical inner chamber and bulb (7) is complementary, described bulb (7) is movably installed in the spherical inner chamber of two hemisphere watt (3) section bar, and described two springs (6) are installed on respectively between described housing (1) and the gripper shoe (10) and two springs (6) distribute with respect to connecting rod (8) left-right symmetry.
2. blackboard eraser according to claim 1 is characterized in that: be separately installed with anti-skidding adhesive tape (2) on the outer two sides of described housing (1).
3. blackboard eraser according to claim 1 and 2, it is characterized in that: seal the elasticity leather bag (13) that has elasticity and have cavity in it around also being equipped with in the described housing (1), the top of described elasticity leather bag (13) be provided with its on plane contact be used for the pressure handle (4) of extruding elasticity leather bag (13), described pressure handle (4) rotatably is fixed in housing (1) upward by rotating shaft (12) and expose with respect to housing (1) upper surface its upper end, also be provided with water pipe (9) and the mouth of pipe (14) on the described elasticity leather bag (13), described water pipe (9) one ends are communicated with the other end with elasticity leather bag (13) and are arranged in sponge block (11), the described mouth of pipe (14) part is exposed with respect to housing (1), and capping plug (5) screws up and is fixed on the described mouth of pipe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210440221 CN102910008A (en) | 2012-11-07 | 2012-11-07 | Blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210440221 CN102910008A (en) | 2012-11-07 | 2012-11-07 | Blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102910008A true CN102910008A (en) | 2013-02-06 |
Family
ID=47608683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210440221 Pending CN102910008A (en) | 2012-11-07 | 2012-11-07 | Blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102910008A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172440A (en) * | 2015-07-28 | 2015-12-23 | 杨柳青 | Environment-friendly blackboard eraser device |
| CN105172441A (en) * | 2015-07-28 | 2015-12-23 | 杨柳青 | Blackboard eraser capable of being quickly cleaned |
| CN106183566A (en) * | 2016-08-18 | 2016-12-07 | 叶芳 | A kind of detachably height adjustable blackboard eraser mechanism |
-
2012
- 2012-11-07 CN CN 201210440221 patent/CN102910008A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172440A (en) * | 2015-07-28 | 2015-12-23 | 杨柳青 | Environment-friendly blackboard eraser device |
| CN105172441A (en) * | 2015-07-28 | 2015-12-23 | 杨柳青 | Blackboard eraser capable of being quickly cleaned |
| CN106183566A (en) * | 2016-08-18 | 2016-12-07 | 叶芳 | A kind of detachably height adjustable blackboard eraser mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |