CN204526562U - Dust-free black board eraser - Google Patents
Dust-free black board eraser Download PDFInfo
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- CN204526562U CN204526562U CN201520015862.1U CN201520015862U CN204526562U CN 204526562 U CN204526562 U CN 204526562U CN 201520015862 U CN201520015862 U CN 201520015862U CN 204526562 U CN204526562 U CN 204526562U
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- water
- plug tube
- bristle
- ball
- piston
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Abstract
The utility model belongs to teaching equipment technical field, relate to a kind of blackboard eraser, be specifically related to a kind of dust-free black board eraser, comprise a mao gusset piece, handle, bristle, piston component and plug tube assembly, bristle gusset piece side has water supply main aperture, first plane there is multiple ostium excurrens, is communicated with water supply main aperture; The suction hole of plug tube assembly is communicated with water cavity, and osculum is communicated with water supply main aperture, and plug tube assembly comprises two check valves; Repeatedly press and loosen button, then the water in water cavity just constantly flows on bristle, and moistening bristle can adsorb chalk powder.The utility model antileaking, easy to operate, water can initiatively flow on bristle, dress water is convenient.
Description
Technical field
The utility model belongs to teaching equipment technical field, relates to a kind of blackboard eraser, is specifically related to a kind of dust-free black board eraser.
Background technology
Blackboard eraser is a kind of device being used for erasing the board, traditional blackboard eraser in use, a lot of chalk powder is often caused to fly upward around in air ambient, easily by neighbouring academics and students's suction body, breathe under such circumstances for a long time, meeting actor or actress's is healthy, and pathology occurs in the serious lung that even can cause.
A lot of researcher have devised various dust-free black board eraser, majority uses the moistening bristle of water, moistening bristle effectively can adsorb chalk powder, thus reach dustless object, but most result of study operability is not so good, or easily leaks, water can not active Flow on bristle, this problem also needs more in depth to study down.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, adapts to reality need, provides a kind of antileaking, easy to operate dust-free black board eraser.
The utility model is achieved through the following technical solutions:
A kind of dust-free black board eraser, comprises bristle gusset piece, handle and bristle;
Bristle gusset piece and handle are en plaques, and bristle gusset piece has two large planes, and the first coplanar gathers bristle, and a plane of the second plane and handle is fixedly connected;
Bristle gusset piece side has water supply main aperture, and water supply main aperture is parallel with the first plane, and the first plane has multiple ostium excurrens, is communicated with water supply main aperture;
When being connected with water in water supply main aperture, being flowed out by ostium excurrens, just in time flowing on bristle, make bristle become moistening, when hand-held handle erases the board, the chalk powder wiped is adsorbed by the bristle wet, can not fly upward with air, thus reach object dustless when erasing the board.
Have upper described dust-free black board eraser, it is characterized by and also comprise piston component and plug tube assembly, handle is not solid, but inside has a cavity to be called water cavity, and the inside can hold water;
Plug tube assembly comprises plug tube and plug tube lid, and plug tube is a cup-shaped components, and its oral area is connected with plug tube lid by screw thread, porose in the middle of plug tube lid; Piston component comprises button, piston rod and piston, and the external cylindrical surface of piston and the inner cylinder face of plug tube tightly coordinate composition moving sets, and cooperation place is air tight, water-tight; The hole of piston rod in the middle of plug tube lid is passed through, and button is positioned at the outside of plug tube;
Cavity that a size can change is formed plunger shaft between the inner cylinder face of piston and plug tube and bottom surface, plunger shaft is built with piston spring, piston is pushed down in piston spring one end, the other end pushes down plug tube bottom surface, then piston is positioned at plug tube oral area under the pressure effect of piston spring always, fits together with plug tube lid; A side of plug tube and handle is fixedly connected;
The suction hole that inside at the bottom of plug tube has diameter less, intercommunicating pore and osculum, also have water sucting cavity and drain chamber that diameter is larger, five holes are interconnected, and axial line parallels, the order that five holes and outside are interconnected is: outside, suction hole, water sucting cavity, intercommunicating pore, drain chamber, osculum, outside; Intercommunicating pore is communicated with plunger shaft by paddle hole;
There is inner conical face the position that suction hole is connected with water sucting cavity, is called the water suction ball conical surface; Water suction ball and water suction spring is provided with in water sucting cavity, water suction ball is in tangency location with the water suction ball conical surface, and water suction spring one end compresses another inner face of water sucting cavity, and the other end compresses water suction ball, the ball that then absorbs water remains and is in tangent position with the ball conical surface that absorbs water, and plays the effect of shutoff; When attempting when there being water to flow into water sucting cavity from suction hole, if the pressure of water is enough large, just can push water suction ball open, water suction spring by compression length shortens, and flows through, finally enter water sucting cavity from the space between water suction ball and the water suction ball conical surface; When attempting when there being water to flow into suction hole from water sucting cavity, water suction ball sealing blocks suction hole, and the pressure of water is larger, and the pressure of water suction ball to the water suction ball conical surface is larger, and shutoff must be tighter, and water can not flow through from here;
There is inner conical face the position that intercommunicating pore is connected with drain chamber, is called the draining ball conical surface; Draining ball and draining spring is provided with in drain chamber, draining ball and the draining ball conical surface are in tangency location, and draining spring one end compresses another inner face of drain chamber, and the other end compresses draining ball, then draining ball remains and is in tangent position with the draining ball conical surface, plays the effect of shutoff; When attempting when there being water to flow into drain chamber from intercommunicating pore, if the pressure of water is enough large, just can push draining ball open, draining spring by compression length shortens, and flows through, finally enter drain chamber from the space between draining ball and the draining ball conical surface; When attempting when there being water to flow into intercommunicating pore from drain chamber, draining ball blocks intercommunicating pore, and the pressure of water is larger, and the pressure of draining ball to the draining ball conical surface is larger, and shutoff must be tighter, and water can not flow through from here;
Porose on water cavity wall, suction hose is communicated with this hole and suction hole;
Water supply main aperture leads to outside an opening, is called water supply aperture, drainpipe communicated drainage hole and water supply aperture;
When there being water in water cavity, pressing button, then piston is along plug tube translation, the space of plunger shaft diminishes, and piston spring is also compressed simultaneously, and the water pressure in plunger shaft becomes large, by paddle hole, intercommunicating pore, push draining ball open, flow through from the gap between draining ball and the draining ball conical surface, enter drain chamber, through osculum, drainpipe, water supply aperture, enter water supply main aperture, flow on bristle through ostium excurrens, thus arrive the object of moistening bristle; In the process, water suction ball blocks water suction aperture all the time, and water can not pass through from here;
Loosen button, then promoted piston by the piston spring compressed to move along plug tube, inside plug tube, the pressure of water diminishes, water pressure in water cavity is larger, water in water cavity, through suction hole, pushes water suction ball open, flows through from the space between water suction ball and the water suction ball conical surface, water inlet water sucting cavity, enters in plunger shaft through intercommunicating pore, paddle hole; In the process, draining ball blocks the draining ball conical surface all the time, and water can not pass through from here;
Repeatedly press and loosen button, then the water in water cavity just constantly flows on bristle.
After the water consumption in water cavity is complete, conveniently to the inside dress water, the utility model also comprises dress water cover, and above-described handle also comprises the dress mouth of a river, and dress water cover and the dress mouth of a river are with thread connection.
Above-described dress water cover, is characterized by bottom surface and has air admission hole, and the inside of bottom surface is provided with elastic strip, and the two ends of elastic strip are fixedly attached on the inwall of bottom surface, and middle one section entirely covers air admission hole; When the pressure ratio outside air in water cavity is large, the water attempt of the inside from air admission hole by time, elastic strip closely covers air admission hole, can stop water thence through; When the pressure ratio outside air in water cavity is little, extraneous air is through air admission hole, promote elastic strip, elastic strip interlude generation elastic deformation is elongated, and it is bending to water cavity direction, create an inlet channel simultaneously, air enters water cavity inside by inlet channel, so, when pressing button, while the water extracted in water cavity squeezes into water supply main aperture, extraneous air enters the space supplementing in water cavity and produce, pressure energy inside and outside water cavity remains balance, and the course of work of whole system can be completed smoothly.
The utility model often will be placed in water in use for some time and clean, and the chalk powder be adsorbed on bristle is rinsed out by water, can have better result of use.
The beneficial effects of the utility model: antileaking, easy to operate, water can initiatively flow on bristle, dress water is convenient.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of the utility model embodiment;
Fig. 2 is the front view of the utility model embodiment;
Fig. 3 is the sectional view along A-A line in Fig. 2;
Fig. 4 is the free state of the sectional view along B-B line in Fig. 3, piston component 1;
Fig. 5 is the sectional view along B-B line in Fig. 3, state when piston component 2 is pressed;
Fig. 6 is the partial enlarged drawing at I place in Fig. 3, elastic strip 62 free state;
Fig. 7 is the partial enlarged drawing at I place in Fig. 3, and elastic strip 62 is by the state of air push generation elastic deformation.
Shown in figure: 1. piston component; 11. buttons; 12. piston rods; 13. pistons; 2. plug tube assembly; 21. plug tube lids; 22. plug tubes; 23. plunger shaft; 24. paddle holes; 3. handle; 31. water cavities; The 32. dress mouths of a river; 4. bristle gusset piece; 41. ostium excurrenses; 42. water supply main apertures; 43. water supply apertures; 44. first planes; 5. bristle; 6. fill water cover; 61. air admission holes; 62. elastic strips; 63. inlet channels; 7. suction hose; 8. drainpipe; 9. piston spring; 10. intercommunicating pore; 701. suction hole; The 702. water suction ball conical surfaces; 703. water suction balls; 704. water sucting cavity; 705. water suction springs; 801. osculum; The 802. draining ball conical surfaces; 803. draining ball; 804. drain chamber; 805. draining springs.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described:
Embodiment: see Fig. 1 to Fig. 7.
A kind of dust-free black board eraser, comprises bristle gusset piece 4, handle 3 and bristle 5;
Bristle gusset piece 4 and handle 3 are en plaques, and bristle gusset piece 4 has two large planes, and a plane of gather above the first plane 44 bristle 5, second plane and handle 3 is fixedly connected;
As shown in Figure 1, Figure 2 and Figure 3, bristle gusset piece 4 side has water supply main aperture 42, and water supply main aperture 42 is parallel with the first plane 44, and the first plane 44 has multiple ostium excurrens 41, and ostium excurrens 41 is communicated with water supply main aperture 42;
When being connected with water in water supply main aperture 42, being flowed out by ostium excurrens 41, just in time flowing on bristle 5, make bristle 5 become moistening, when hand-held handle 3 erases the board, the chalk powder wiped is adsorbed by the bristle 5 wet, can not fly upward with air, thus reach object dustless when erasing the board.
Have upper described dust-free black board eraser, it is characterized by and also comprise piston component 1 and plug tube assembly 2, as shown in Figure 3, handle 3 is not solid, but inside has a cavity to be called water cavity 31, and the inside can hold water;
As shown in Figure 4 and Figure 5, plug tube assembly 2 comprises plug tube 22 and plug tube lid 21, and plug tube 22 is cup-shaped components, and its oral area is connected with plug tube lid 21 by screw thread, porose in the middle of plug tube lid 21; Piston component 1 comprises button 11, piston rod 12 and piston 13, and the external cylindrical surface of piston 13 and the inner cylinder face of plug tube 22 tightly coordinate composition moving sets, and cooperation place is air tight, water-tight; The hole of piston rod 12 in the middle of plug tube lid 21 is passed through, and button 11 is positioned at the outside of plug tube 22;
Cavity that a size can change is formed plunger shaft 23 between the inner cylinder face of piston 13 and plug tube 22 and bottom surface, plunger shaft 23 is built with piston spring 9, piston 13 is pushed down in piston spring 9 one end, the other end pushes down plug tube 22 bottom surface, then piston 13 is positioned at plug tube 22 oral area under the pressure effect of piston spring 9 always, fits together with plug tube lid 21; Plug tube 22 is fixedly connected with a side of handle 3;
Suction hole 701, intercommunicating pore 10 and osculum 801 that the inside at plug tube 22 end has diameter less, also have water sucting cavity 704 and drain chamber 804 that diameter is larger, five holes are interconnected, and axial line parallels, the order that five holes and outside are interconnected is: outside, suction hole 701, water sucting cavity 704, intercommunicating pore 10, drain chamber 804, osculum 801, outside; Intercommunicating pore 10 is communicated with plunger shaft 23 by paddle hole 24;
There is inner conical face the position that suction hole 701 is connected with water sucting cavity 704, is called the water suction ball conical surface 702; Water suction ball 703 and water suction spring 705 is provided with in water sucting cavity 704, water suction ball 703 is in tangency location with the water suction ball conical surface 702, water suction spring 705 one end compresses another inner face of water sucting cavity 704, the other end compresses water suction ball 703, the ball 703 that then absorbs water remains and is in tangent position with the ball conical surface 702 that absorbs water, and plays the effect of shutoff; When attempting when there being water to flow into water sucting cavity 704 from suction hole 701, if the pressure of water is enough large, just can push water suction ball 703 open, water suction spring 705 by compression length shortens, flow through from the space between water suction ball 703 and the water suction ball conical surface 702, finally enter water sucting cavity 704; When attempting when there being water to flow into suction hole 701 from water sucting cavity 704, water suction ball 703 blocks suction hole 701, and the pressure of water is larger, and the pressure of water suction ball 703 to the water suction ball conical surface 702 is larger, and shutoff must be tighter, and water can not flow through from here;
There is inner conical face the position that intercommunicating pore 10 is connected with drain chamber 804, is called the draining ball conical surface 802; Draining ball 803 and draining spring 805 is provided with in drain chamber 804, draining ball 803 and the draining ball conical surface 802 are in tangency location, draining spring 805 one end compresses another inner face of drain chamber 804, the other end compresses draining ball 803, then draining ball 803 remains and is in tangent position with the draining ball conical surface 802, plays the effect of shutoff; When attempting when there being water to flow into drain chamber 804 from intercommunicating pore 10, if the pressure of water is enough large, just can push draining ball 803 open, draining spring 805 by compression length shortens, and flows through from the space between draining ball 803 and the draining ball conical surface 802, finally enters drain chamber 804; When attempting when there being water to flow into intercommunicating pore 10 from drain chamber 804, draining ball 803 blocks intercommunicating pore 10, and the pressure of water is larger, and the pressure of draining ball 803 pairs of draining ball conical surfaces 802 is larger, and shutoff must be tighter, and water can not flow through from here;
Porose on water cavity 31 wall, suction hose 7 is communicated with this hole and suction hole 701;
Water supply main aperture 42 leads to outside an opening, is called water supply aperture 43, drainpipe 8 communicated drainage hole 801 and water supply aperture 43;
When having water in water cavity 31, pressing button 11, then piston 13 is along plug tube 22 translation, the space of plunger shaft 23 diminishes, piston spring 9 is also compressed simultaneously, water pressure in plunger shaft 23 becomes large, by paddle hole 24, intercommunicating pore 10, push draining ball 803 open, flow through from the gap between draining ball 803 and the draining ball conical surface 802, enter drain chamber 804, through osculum 801, drainpipe 8, water supply aperture 43, enter water supply main aperture 42, flow on bristle 5 through ostium excurrens 41, thus arrive the object of moistening bristle 5, as shown in Figure 5; In the process, water suction ball 703 blocks water suction aperture all the time, and water can not pass through from here;
Loosen button 11, then promoted piston 13 by the piston spring 9 compressed to move along plug tube 22, inside plug tube 22, the pressure of water diminishes, water pressure in water cavity 31 is comparatively large, and the water in water cavity 31, through suction hole 701, pushes water suction ball 703 open, flow through from the space between water suction ball 703 and the water suction ball conical surface 702, water inlet water sucting cavity 704, enters in plunger shaft 23 through intercommunicating pore 10, paddle hole 24, as shown in Figure 4; In the process, draining ball 803 blocks the draining ball conical surface 802 all the time, and water can not pass through from here;
Repeatedly press and loosen button 11, then the water in water cavity 31 just constantly flows on bristle 5.
After the water consumption in water cavity 31 is complete, conveniently to the inside dress water, the present embodiment also comprises dress water cover 6, and above-described handle 3 also comprises the dress mouth of a river 32, and dress water cover 6 and the dress mouth of a river 32 are with thread connection.
As shown in Figure 6 and Figure 7, above-described dress water cover 6, is characterized by bottom surface and has air admission hole 61, and the inside of bottom surface is provided with elastic strip 62, and the two ends of elastic strip 62 are fixedly attached on the inwall of bottom surface, and middle one section entirely covers air admission hole 61, as shown in Figure 6, when the pressure ratio outside air in water cavity 31 is large, the water attempt of the inside from air admission hole 61 by time, elastic strip 62 closely covers air admission hole 61, can stop water thence through, as shown in Figure 7, when the pressure ratio outside air in water cavity 31 is little, extraneous air is through air admission hole 61, promote elastic strip 62, elastic strip 62 interlude generation elastic deformation is elongated, and it is bending to water cavity 31 direction, create an inlet channel 63 simultaneously, it is inner that air enters water cavity 31 by inlet channel 63, so, when pressing button 11, while the water extracted in water cavity 31 squeezes into water supply main aperture 42, extraneous air enters the space supplementing in water cavity 31 and produce, pressure energy inside and outside water cavity 31 remains balance, the course of work of whole system can be completed smoothly.
The present embodiment often will be placed in water in use for some time and clean, and the chalk powder be adsorbed on bristle 5 is rinsed out by water, can have better result of use.
The beneficial effect of the present embodiment: antileaking, easy to operate, water can initiatively flow on bristle 5, dress water is convenient.
Claims (5)
1. a dust-free black board eraser, is characterized in that, comprises bristle gusset piece, handle and bristle;
Bristle gusset piece and handle are en plaques, and bristle gusset piece has two large planes, and the first coplanar gathers bristle, and a plane of the second plane and handle is fixedly connected;
Bristle gusset piece side has water supply main aperture, and water supply main aperture is parallel with the first plane, and the first plane has multiple ostium excurrens, is communicated with water supply main aperture; Water is through water supply main aperture and ostium excurrens flowing.
2. dust-free black board eraser according to claim 1, is characterized by and also comprise piston component and plug tube assembly, and there is a water cavity handle inside;
Plug tube assembly comprises plug tube and plug tube lid, and plug tube is a cup-shaped components, and its oral area is connected with plug tube lid by screw thread, porose in the middle of plug tube lid; Piston component comprises button, piston rod and piston, and the external cylindrical surface of piston and the inner cylinder face of plug tube tightly coordinate composition moving sets; The hole of piston rod in the middle of plug tube lid is passed through, and button is positioned at the outside of plug tube;
Form plunger shaft between the inner cylinder face of piston and plug tube and bottom surface, plunger shaft is built with piston spring, and piston is pushed down in piston spring one end, and the other end pushes down plug tube bottom surface; A side of plug tube and handle is fixedly connected;
The suction hole that inside at the bottom of plug tube has diameter less, intercommunicating pore and osculum, also have water sucting cavity and drain chamber that diameter is larger, five holes are interconnected, and axial line parallels, the order that five holes and outside are interconnected is: outside, suction hole, water sucting cavity, intercommunicating pore, drain chamber, osculum, outside; Intercommunicating pore is communicated with plunger shaft by paddle hole;
There is the ball conical surface that absorbs water the position that suction hole is connected with water sucting cavity; Be provided with water suction ball and water suction spring in water sucting cavity, water suction ball is in tangency location with the water suction ball conical surface, and water suction spring one end compresses another inner face of water sucting cavity, and the other end compresses water suction ball;
There is the draining ball conical surface position that intercommunicating pore is connected with drain chamber; Be provided with draining ball and draining spring in drain chamber, draining ball and the draining ball conical surface are in tangency location, and draining spring one end compresses another inner face of drain chamber, and the other end compresses draining ball;
Porose on water cavity wall, suction hose is communicated with this hole and suction hole;
Water supply main aperture leads to outside water supply aperture, drainpipe communicated drainage hole and water supply aperture.
3. dust-free black board eraser according to claim 1 and 2, is characterized by and also comprise dress water cover, and handle also comprises the dress mouth of a river, and dress water cover and the dress mouth of a river are with thread connection.
4. dust-free black board eraser according to claim 3, it is characterized by dress water cover bottom surface and have air admission hole, the inside of bottom surface is provided with elastic strip, and the two ends of elastic strip are fixedly attached on the inwall of bottom surface, and middle one section entirely covers air admission hole.
5. the dust-free black board eraser according to claim 1 or 2 or 4, is characterized by water cavity and holds water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520015862.1U CN204526562U (en) | 2015-01-10 | 2015-01-10 | Dust-free black board eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520015862.1U CN204526562U (en) | 2015-01-10 | 2015-01-10 | Dust-free black board eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204526562U true CN204526562U (en) | 2015-08-05 |
Family
ID=53740607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520015862.1U Expired - Fee Related CN204526562U (en) | 2015-01-10 | 2015-01-10 | Dust-free black board eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204526562U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437837A (en) * | 2015-12-15 | 2016-03-30 | 费春霞 | Dust-free blackboard eraser with cleaning function |
| CN106808865A (en) * | 2017-01-19 | 2017-06-09 | 夏正付 | A kind of novel blackboard eraser |
| CN108790514A (en) * | 2018-06-20 | 2018-11-13 | 江苏海事职业技术学院 | Squash type whiteboard eraser |
-
2015
- 2015-01-10 CN CN201520015862.1U patent/CN204526562U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437837A (en) * | 2015-12-15 | 2016-03-30 | 费春霞 | Dust-free blackboard eraser with cleaning function |
| CN106808865A (en) * | 2017-01-19 | 2017-06-09 | 夏正付 | A kind of novel blackboard eraser |
| CN108790514A (en) * | 2018-06-20 | 2018-11-13 | 江苏海事职业技术学院 | Squash type whiteboard eraser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160110 |