CN201070921Y - Electromagnetic chalk ash free type writing board and special writing appliances - Google Patents
Electromagnetic chalk ash free type writing board and special writing appliances Download PDFInfo
- Publication number
- CN201070921Y CN201070921Y CNU2007202008342U CN200720200834U CN201070921Y CN 201070921 Y CN201070921 Y CN 201070921Y CN U2007202008342 U CNU2007202008342 U CN U2007202008342U CN 200720200834 U CN200720200834 U CN 200720200834U CN 201070921 Y CN201070921 Y CN 201070921Y
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- pen cap
- type dust
- electromagnetic type
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- 239000003094 microcapsule Substances 0.000 claims description 42
- 210000000245 forearm Anatomy 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000000873 masking effect Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 208000002925 dental caries Diseases 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000011835 investigation Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001640034 Heteropterys Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000000622 irritating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses an electromagnetic dustless writing board and a special writing pen. The writing board comprises a lining board, a bottom board, a microencapsulated panel containing a magnet-sensitive developer, a frame, a guide groove, a shadow-eliminating ring and a supporter. The special writing pen comprises a pen cover, a magnetic bar, a window-type magnetic controller and a pen head. The utility model employs the shadow-eliminating ring to erase the letters on the board over a wide range, and has strong practicability and is easy to be promoted. The special writing pen can greatly increase the readability of the writing track. The writing pen has a window-type magnetic controller to enable a user to write clearly and quickly. The utility model utilizes the supporter and counterweight traction mechanism to enable the writing board to move vertically and smoothly, thereby ensuring the user to write at a comfortable altitude all along. The utility model is suitable for the use in class room, meeting room and other places.
Description
Technical field
The utility model relates to a kind of clipboard and lettering pen, particularly relates to a kind of electromagnetic type dust-free writing plate and special writing pen.
Background technology
Along with the progress of society, people's environmental protection consciousness strengthens day by day.Present traditional blackboard or the blank that generally adopts, when using chalk or all kinds of coloured art pen to write, the dust or the irritative gas that are produced pollute the environment, harm user's health, so people have developed magnetic blackboard, it is an electromagnetic property of utilizing material, makes close magnetic show the effect bottom offset of material at electromagnetic field, thereby finishes demonstration and wipe writing on the blackboard track purpose.But existing magnetic blackboard is to wipe with the solenoid of a large-scale permanent magnet or the big pole plate of band, this just makes existing magnetic blackboard can only implement large-area wiping, can not wipe single writing or littler scope, practicality is relatively poor in the process that reality is used, and causes it to be difficult to extensively popularize; In addition, existing magnetic blackboard uses a permanent magnet to write, and this just causes the magnetic field that permanent magnet comes out when writing that the close magnetic of application point periphery is shown the material influence, and the track of writing is unintelligible.In addition, traditional blackboard or blank are to be fixed on wall or the support, can not upper and lowerly move, and user's comfortableness when writing is relatively poor.
Summary of the invention
The purpose of this utility model provides a kind of energy-conserving and environment-protective, can realize wiping of handwriting trace among a small circle, practicality is strong, be convenient to extensively popularize, the special writing pen that the track definition that user's more comfortable electromagnetic type dust-free writing plate and making when writing is write significantly improves is to overcome the deficiencies in the prior art.
Electromagnetic type dust-free writing plate of the present utility model is to constitute like this: it comprises liner plate 1, be provided with base plate 2 in the back of liner plate 1, be provided with microcapsules panel 3 in the front of liner plate 1, be provided with the hollow microcapsules layer 4 that includes close magnetic demonstration material at microcapsules panel 3 inner surfaces, liner plate 1 and base plate 2, microcapsules panel 3 are fixed in the frame 5, arranged outside has guide groove 6 around frame 5, is provided with the shadow ring that disappears on the guide groove 6 of upper and lower side.
In the above-mentioned electromagnetic type dust-free writing plate, the described shadow ring that disappears be by the forearm 7 that is arranged at microcapsules panel 3 fronts, be arranged at base plate 2 back postbrachium 8, connect forearm 7 and postbrachium 8 and be articulated in the connector 17 on the guide groove 6, the roller 24 that is arranged on the connector 17 constitutes.
In the aforesaid electromagnetic type dust-free writing plate, forearm 7 and postbrachium 8 are structures of two or more cavity combinations of vertically arranging, in each cavity in postbrachium 8 solenoid is housed, be equipped with in each cavity in forearm 7 with postbrachium 8 cavitys in the power switch of the corresponding connection of solenoid.
In the aforesaid electromagnetic type dust-free writing plate, outside the solenoid of the cavity inside of postbrachium 8, magnetic shielding cover is housed also.
In the aforesaid electromagnetic type dust-free writing plate, described solenoid is an E sections electromagnetic wire circle.
In the aforesaid electromagnetic type dust-free writing plate, and arranged on left and right sides at frame 5 also is provided with support 18, be provided with traction guide wheel 19 in support 18 upper ends, on support 18 medial surfaces, be provided with the gib block 25 of projection, gib block 25 places in the guide groove 6 of and arranged on left and right sides, be provided with counterweight lead 20 on support 18 lateral surfaces, counterweight lead 20 is connected with frame 5 by the steel wire rope 21 of walking around traction guide wheel 19.
The special writing pen of electromagnetic type dust-free writing plate of the present utility model is to constitute like this: it has the pen cap 9, top in the pen cap 9 and middle part are fixed with bar magnet 10, bottom in the pen cap 9 is provided with window formula magnetic force control 11, and the bottom of the pen cap 9 is connected with nib 12.
In the special writing pen of above-mentioned electromagnetic type dust-free writing plate, described window formula magnetic force control 11 be by be fixed on spring 13 on the pen cap 9 madial walls, be connected and be arranged on moving grid 14 in the pen cap 9 with spring 13, is connected with moving grid 14 and and spring 13 be symmetricly set on pressure-button 15 on the pen cap 9 sidewalls, be arranged between moving grid 14 and written 12 and be fixed on the interior fixed grid 16 of the pen cap 9 and constitute.
In the special writing pen of aforesaid electromagnetic type dust-free writing plate, described pressure-button 15 is passed the sidewall of the pen cap 9 and is protruded from outside the pen cap 9.
In the special writing pen of aforesaid electromagnetic type dust-free writing plate, the described pen cap 9 is to be made of magnetic layer 22, the magnetic masking layer 23 that is arranged on magnetic layer 22 inside and outside both sides.
Compared with the prior art, the utility model uses the shadow ring that disappears to wipe writing, and the shadow ring that disappears is the structure that is divided into forward and backward two arms and vertical cavity combinations of arranging, and it is installed on the guide groove by roller, can move left and right.Magnetic shielding cover all is installed in each cavity of postbrachium and in magnetic shielding cover, is placed with E sections electromagnetic wire circle, such structure makes the excessive magnetic field energy of solenoid reduce effectively, thereby reduced zone that needs are wiped around influence, through repeatedly practice, the utility model can reach to be wiped the scope of half word height of conventional writing on the blackboard writing, practicality is stronger, is convenient to extensive popularization; In addition, reduce effectively in the excessive magnetic field that the pen cap of the special writing pen that the utility model uses can make its bar magnet produce, weakened bar magnet to writing the influence of a periphery, the generation and last write that reduce handwriting trace edge burr show that a powder sharply relies on back one and writes a little, thereby have significantly improved the definition of handwriting trace; In addition, lettering pen of the present utility model adopts window formula magnetic force control, when the finger strength that holds a pen strengthens, the area that the window of the moving grid of window formula magnetic force control and the window of fixed grid overlap increases, make the magnetic field that arrives the lettering pen nib strengthen, make close magnetic show that material is when writing fast, under strong magnetic field action fast offset to the hollow microcapsules layer near a side of microcapsules panel outer surface and demonstrate writing, meeting holds a pen when people write fast refers to the bigger custom of strength, can write out track more clearly.Besides, the support of employing and counterweight haulage gear make upper and lower being free to slide of clipboard energy of the present utility model, allow the user write at comfortable height all the time.Owing to the utlity model has above-mentioned advantage, so it is applicable to various places such as classroom, meeting room.
Description of drawings
Fig. 1 is the structural representation of electromagnetic type dust-free writing plate of the present utility model;
Fig. 2 is the A-A cutaway view of electromagnetic type dust-free writing plate of the present utility model;
Fig. 3 is the structural representation of special writing pen of the present utility model;
Fig. 4 is the cutaway view of special writing pen of the present utility model;
Being labeled as of accompanying drawing: 1-liner plate, 2-base plate, 3-microcapsules panel, 4-hollow microcapsules layer, 5-frame, the 6-guide groove, 7-forearm, 8-postbrachium, the 9-pen cap, the 10-bar magnet, 11-window formula magnetic force control, 12-nib, 13-spring, the 14-moving grid, 15-pressure-button, 16-fixed grid, 17-connector, the 18-support, 19-draws guide wheel, 20-counterweight lead, 21-steel wire rope, the 22-magnetic layer, 23-magnetic masking layer, 24-roller, 25-gib block.
The specific embodiment
Embodiment 1 of the present utility model: electromagnetic type dust-free writing plate of the present utility model as depicted in figs. 1 and 2, it comprises the liner plate 1 of existing magnetic blackboard structure, a base plate 2 is installed in back at liner plate 1, an existing transparent microcapsules panel 3 is installed in the front of liner plate 1, hollow microcapsule layer 4 on microcapsules panel 3 inner surface additionals, close magnetic is shown that material (as materials such as iron powders) is wrapped in the hollow microcapsules of hollow microcapsules layer 4, with liner plate 1, with base plate 2, microcapsules panel 3 all is fixed in the frame 5, driving a guide groove 6 respectively on the outside around the frame 5, the shape of guide groove 6 can be square, last, the shadow ring that disappears is installed on the guide groove 6 of following both sides, make disappear the shadow ring can be on guide groove 6 move left and right, the shadow ring that disappears is by forearm 7, postbrachium 8, connector 17 and roller 24 constitute, forearm 7 is installed in the front of microcapsules panel 3, postbrachium 8 is installed in the back of base plate 2, connect forearm 7 and postbrachiums 8 and be articulated on the guide groove 6 with connector 17, at the one or more roller 24 of connector 17 center fixed, make roller to guide and disappear the shadow ring along guide groove 6 move left and right, forearm 7 and postbrachium 8 can be the structures of two or more cavity combinations of vertically arranging, load onto a magnetic shielding cover in each cavity in postbrachium 8 earlier, in magnetic shielding cover, load onto a solenoid, in each cavity of forearm 7, load onto and the corresponding power switch of postbrachium 8 solenoids, be that the power switch control of being adorned in each cavity of forearm 7 is in the solenoid of being adorned in postbrachium 8 cavitys of par position with it, through long-term practice, it is best that its described solenoid is wiped effect during with E sections electromagnetic wire circle, concrete cavity numbers (for example: the investigation on the spot of writing on the blackboard writing size and line-spacing width according to teaching the time can require to make according to reality, can make 23 cavitys for the microcapsules panel 3 that highly is a meter, according to investigation on the spot to when teaching book writing size, can use the E sections electromagnetic wire circle in three continuous cavitys to wipe delegation's word), in order to make on the clipboard energy of the present utility model, under be free to slide, allow the user write at comfortable height all the time, left side at frame 5, right both sides can also be installed a support 18 respectively, at traction guide wheel 19 of the upper end of every support 18 fixed installation, can go up in order to make clipboard, move and not swing down, the gib block 25 of projection is installed on support 18 medial surfaces, the protuberance of gib block 25 is placed a left side, in the guide groove 6 of right both sides, a counterweight lead 20 is installed respectively on the lateral surface of every support 18, counterweight lead 20 is connected on the frame 5 by the steel wire rope 21 of walking around traction guide wheel 19, its traction guide wheel 19 and counterweight lead 20 and steel wire rope 21 constitute the counterweight haulage gear again.
The utility model can be regulated the height of clipboard in use earlier according to the actual needs by the counterweight haulage gear.With the object that has magnetic (for example: during permanent magnet) near microcapsules panel 3, close magnetic in the hollow microcapsules layer 4 show material the effect bottom offset of magnetic force to the hollow microcapsules layer 4 near a side of microcapsules panel 3 outer surfaces and demonstrate writing, realize writing.Power switch is connected with power supply, when needs are wiped handwriting trace, the forearm 7 of shadow ring of will disappearing moves to the original position that need wipe, open to wipe with needs at this moment on the forearm 7 and be in the corresponding power switch of horizontal level, be in the E sections electromagnetic wire circle energising of being adorned in postbrachium 8 cavitys of par position with this power switch on the forearm 7, move the shadow ring that disappears to the ultimate position that need wipe, the close magnetic that need wipe the place shows that material is just under the electromagnetic force effect that E sections electromagnetic wire circle produces, move to a side of close liner plate 1 in the hollow microcapsules layer 4 rapidly, close the power switch that forearm 7 is opened, promptly finished the track that needs erasure location to write and wiped.
Embodiment 2 of the present utility model: electromagnetic type dust-free writing plate of the present utility model as depicted in figs. 1 and 2, it comprises the liner plate 1 of existing magnetic blackboard structure, a base plate 2 is installed in back at liner plate 1, an existing transparent microcapsules panel 3 is installed in the front of liner plate 1, hollow microcapsule layer 4 on microcapsules panel 3 inner surface additionals, close magnetic is shown that material (as materials such as iron powders) is wrapped in the hollow microcapsules of hollow microcapsules layer 4, with liner plate 1, with base plate 2, microcapsules panel 3 all is fixed in the frame 5, driving a guide groove 6 respectively on the outside around the frame 5, the shape of guide groove 6 can be square, last, the shadow ring that disappears is installed on the guide groove 6 of following both sides, make disappear the shadow ring can be on guide groove 6 move left and right, the shadow ring that disappears is by forearm 7, postbrachium 8, connector 17 and roller 24 constitute, forearm 7 is installed in the front of microcapsules panel 3, postbrachium 8 is installed in the back of base plate 2, connect forearm 7 and postbrachiums 8 and be articulated on the guide groove 6 with connector 17, at the one or more roller 24 of connector 17 center fixed, make roller to guide and disappear the shadow ring along guide groove 6 move left and right, forearm 7 and postbrachium 8 can be the structures of two or more cavity combinations of vertically arranging, load onto a magnetic shielding cover in each cavity in postbrachium 8 earlier, in magnetic shielding cover, load onto a solenoid, in each cavity of forearm 7, load onto and the corresponding power switch of postbrachium 8 solenoids, be that the power switch control of being adorned in each cavity of forearm 7 is in the solenoid of being adorned in postbrachium 8 cavitys of par position with it, through long-term practice, it is best that its described solenoid is wiped effect during with E sections electromagnetic wire circle, concrete cavity numbers (for example: the investigation on the spot of writing on the blackboard writing size and line-spacing width according to teaching the time can require to make according to reality, can make 23 cavitys for the microcapsules panel 3 that highly is a meter, according to investigation on the spot to when teaching book writing size, can use the E sections electromagnetic wire circle in three continuous cavitys to wipe delegation's word), in order to make on the clipboard energy of the present utility model, under be free to slide, allow the user write at comfortable height all the time, left side at frame 5, right both sides can also be installed a support 18 respectively, at traction guide wheel 19 of the upper end of every support 18 fixed installation, can go up in order to make clipboard, move and not swing down, the gib block 25 of projection is installed on support 18 medial surfaces, the protuberance of gib block 25 is placed a left side, in the guide groove 6 of right both sides, a counterweight lead 20 is installed respectively on the lateral surface of every support 18, counterweight lead 20 is connected on the frame 5 by the steel wire rope 21 of walking around traction guide wheel 19, its traction guide wheel 19 and counterweight lead 20 and steel wire rope 21 constitute the counterweight haulage gear again.
The special writing pen of electromagnetic type dust-free writing plate of the present utility model as shown in Figure 3 and Figure 4, it has a pen cap 9, in order to reduce effectively in the excessive magnetic field that bar magnet is produced, weakened bar magnet to writing the influence of a periphery, the pen cap 9 can be made of magnetic layer 22, magnetic masking layer 23, at magnetic masking layer 23 of each suit of the inside and outside both sides of magnetic layer 22.Top in the pen cap 9 and middle part wrap a bar magnet 10, bar magnet 10 is permanent magnets, a window formula magnetic force control 11 is installed in bottom in the pen cap 9, window formula magnetic force control 11 is by spring 13, moving grid 14, pressure-button 15, fixed grid 16 constitutes, spring 13 is fixed on the pen cap 9 lower inside walls, an end that spring 13 and level is installed in the moving grid 14 in the pen cap 9 is connected, the other end of moving grid 14 is connected with pressure-button 15, spring 13 and pressure-button 15 are installed on the madial wall of the pen cap 9 bottoms symmetrically, its described pressure-button 15 is passed the sidewall of the pen cap 9 and is protruded from outside the pen cap 9, with fixed grid 16 be installed in moving grid 14 and the nib 12 between and be fixed on the madial wall of the pen cap 9, bottom with the pen cap 9 connects nib 12 at last, nib 12 is to make (as electrical pure iron with high permeability material, high permeability materials such as electromagnetic pure iron are made), the screen layer of its described pen cap 9, moving grid 14, fixed grid 16 all adopts magnetic shielding material to make (as materials such as copper).
The utility model can be regulated the height of clipboard in use earlier according to the actual needs by the counterweight haulage gear.With the nib 12 of special writing pen of the present utility model during near microcapsules panel 3, pressure-button 15 press...withes one's finger, the window of moving grid 14 just progressively overlaps with the window of fixed grid 16, the window that makes the magnetic line of force in bar magnet 10 magnetic fields be passed coincidence arrives at nib 12, close magnetic in hollow microcapsules layer 4 shows material, parent's magnetic show material the effect bottom offset of magnetic force to the hollow microcapsules layer 4 near a side of microcapsules panel 3 outer surfaces and demonstrate writing, realize writing; When the user writes fast, hold a pen when referring to that strength strengthens naturally, the pressure-button 15 that makes finger be held is further pushed moving grid 14, the area that the window of the window of moving grid 14 and fixed grid 16 overlaps increases, the feasible magnetic force that arrives the nib 12 of special writing pen strengthens, make close magnetic show material under strong magnetic field action fast offset to the hollow microcapsules layer 4 near a side of microcapsules panel 3 outer surfaces and show, write out track clearly.When needs are wiped handwriting trace, the forearm 7 of shadow ring of will disappearing moves to the original position that need wipe, open on the forearm 7 to wipe and be in the pairing power switch in par position with needs, be in the E sections electromagnetic wire circle energising of being adorned in the cavity of postbrachium 8 of par position with this power switch on the forearm 7, move the shadow ring that disappears to the ultimate position that need wipe, the close magnetic that need wipe the place shows that material is just under the electromagnetic force effect that E sections electromagnetic wire circle produces, move to a side of close liner plate 1 in the hollow microcapsules layer 4 rapidly, close the power switch that forearm 7 is opened, promptly finished the track that needs erasure location to write and wiped.
Claims (10)
1. electromagnetic type dust-free writing plate, it comprises liner plate (1), be provided with base plate (2) in the back of liner plate (1), be provided with microcapsules panel (3) in the front of liner plate (1), be provided with the hollow microcapsules layer (4) that includes close magnetic demonstration material at microcapsules panel (3) inner surface, liner plate (1), base plate (2) and microcapsules panel (3) are fixed in the frame (5), it is characterized in that, frame (5) all around arranged outside guide groove (6) is arranged, on the guide groove (6) of upper and lower side, be provided with the shadow ring that disappears.
2. electromagnetic type dust-free writing plate according to claim 1, it is characterized in that, the described shadow ring that disappears be by the forearm (7) that is arranged at microcapsules panel (3) front, be arranged at base plate (2) back postbrachium (8), connect forearm (7) and postbrachium (8) and be articulated in connector (17) on the upper and lower side guidance (6) of frame (5), be arranged on roller (24) formation on the connector (17).
3. electromagnetic type dust-free writing plate according to claim 2, it is characterized in that, forearm (7) and postbrachium (8) are the structures of two or more cavity combinations of vertically arranging, in each cavity in postbrachium (8) solenoid is housed, be equipped with in each cavity in forearm (7) with postbrachium (8) cavity in the power switch of the corresponding connection of solenoid.
4. electromagnetic type dust-free writing plate according to claim 3 is characterized in that, outside the solenoid of the cavity inside of postbrachium (8) magnetic shielding cover is housed also.
5. electromagnetic type dust-free writing plate according to claim 3 is characterized in that, described solenoid is an E sections electromagnetic wire circle.
6. electromagnetic type dust-free writing plate according to claim 5, it is characterized in that, and arranged on left and right sides at frame (5) also is provided with support (18), be provided with traction guide wheel (19) in support (18) upper end, on support (18) medial surface, be provided with the gib block (25) of projection, gib block (25) places in the guide groove (6) of and arranged on left and right sides, be provided with counterweight lead (20) on support (18) lateral surface, counterweight lead (20) is connected with frame (5) by the steel wire rope (21) of walking around traction guide wheel (19).
7. the special writing pen of an electromagnetic type dust-free writing plate, it is characterized in that it has the pen cap (9), top in the pen cap (9) and middle part are fixed with bar magnet (10), bottom in the pen cap (9) is provided with window formula magnetic force control (11), and the bottom of the pen cap (9) is connected with nib (12).
8. the special writing pen of electromagnetic type dust-free writing plate according to claim 7, it is characterized in that, described window formula magnetic force control (11) be by be fixed on spring (13) on the pen cap (9) madial wall, be connected and be arranged on moving grid (14) in the pen cap (9) with spring (13), is connected with moving grid (14) and and spring (13) be symmetricly set on pressure-button (15) on the pen cap (9) sidewall, be arranged between moving grid (14) and written (12) and be fixed on interior fixed grid (16) formation of the pen cap (9).
9. the special writing pen of electromagnetic type dust-free writing plate according to claim 8 is characterized in that, described pressure-button (15) is passed the sidewall of the pen cap (9) and protruded from outside the pen cap (9).
10. the special writing pen of electromagnetic type dust-free writing plate according to claim 7 is characterized in that, the described pen cap (9) is to be made of magnetic layer (22), the magnetic masking layer (23) that is arranged on the inside and outside both sides of magnetic layer (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202008342U CN201070921Y (en) | 2007-08-16 | 2007-08-16 | Electromagnetic chalk ash free type writing board and special writing appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202008342U CN201070921Y (en) | 2007-08-16 | 2007-08-16 | Electromagnetic chalk ash free type writing board and special writing appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201070921Y true CN201070921Y (en) | 2008-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007202008342U Expired - Fee Related CN201070921Y (en) | 2007-08-16 | 2007-08-16 | Electromagnetic chalk ash free type writing board and special writing appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201070921Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092401A (en) * | 2011-11-01 | 2013-05-08 | 肯特显示器公司 | Writing tablet information recording device |
| CN109473019A (en) * | 2018-11-16 | 2019-03-15 | 安徽徽煌教育科技有限公司 | A demonstration sailboat for fluid mechanics teaching |
-
2007
- 2007-08-16 CN CNU2007202008342U patent/CN201070921Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092401A (en) * | 2011-11-01 | 2013-05-08 | 肯特显示器公司 | Writing tablet information recording device |
| CN109473019A (en) * | 2018-11-16 | 2019-03-15 | 安徽徽煌教育科技有限公司 | A demonstration sailboat for fluid mechanics teaching |
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Granted publication date: 20080611 Termination date: 20110816 |