CN205149342U - Silence electric blackboard wipe - Google Patents
Silence electric blackboard wipe Download PDFInfo
- Publication number
- CN205149342U CN205149342U CN201520916349.XU CN201520916349U CN205149342U CN 205149342 U CN205149342 U CN 205149342U CN 201520916349 U CN201520916349 U CN 201520916349U CN 205149342 U CN205149342 U CN 205149342U
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- dust
- collecting box
- housing
- blackboard eraser
- electric blackboard
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Abstract
The utility model discloses a silence electric blackboard wipe, including the dust -collecting box, this dust -collecting box is connected with dust extraction, and is connected with the hose on the lateral wall of this dust -collecting box, and the other end of this hose is connected with the brush body, and this brush is personally experienced sth. Part of the body and is had the portion of cleaning, dust extraction includes a casing, be equipped with the fan chamber in this casing, this fan chamber has the through opening of this casing inner chamber of intercommunication, the bottom in this fan chamber is equipped with the air intake, this fan intracavity is equipped with electronic extraction fan, be equipped with the air exit on the lateral wall of this casing, and simultaneously, this casing outside is equipped with a noise elimination seat, it falls the chamber of making an uproar to be equipped with one in this noise elimination seat, should fall is equipped with the inlet port of intercommunication to this noises elimination seat outside on the lateral wall in the chamber of making an uproar, should fall the intracavity of making an uproar is equipped with the back flow, the intercommunication back flow of two liang of correspondences of inlet port, and the air intake intercommunication is to falling the chamber of making an uproar, and, this casing detachable is fixed in the opening of this dust -collecting box, and should eliminate the noise the seat in this dust -collecting box. The utility model has the advantages that: the noise is less, comparatively convenient.
Description
Technical field
The present invention relates to teaching aid technical field, especially relate to a kind of quiet electric blackboard eraser.
Background technology
Adopting chalk-writing to impart knowledge to students on blackboard, is teaching demonstration mode still comparatively popular at present.Wherein, when using common blackboard eraser to carry out blackboard wiping, inevitable version is along with relatively large dust, thus the dust polluting environment flown upward everywhere all defines certain impact for the health of Faculty and Students even.
For this reason, some blackboard erasers with dust-absorbing function arise at the historic moment.Such as, a kind of electric blacboard eraser with chalk dust absorbing that the present inventor develops, comprises the casing that induced-draught fan is housed, the brush body having suction port, and described brush body surface is furnished with cleaning part, described casing is communicated with brush body by sweep-up pipe, described casing is provided with the exhaust outlet for induced-draught fan air draft; Described electric blacboard eraser with chalk dust absorbing also comprises the brush holder mated with brush body, described brush holder is provided with brush body and leaves brush holder and namely connect current supply circuit, and brush body inserts the switch that namely brush holder disconnects current supply circuit.So, while blackboard wiping, induced-draught fan carries out air draught, greatly reduces the pollution that dust is formed.
But much have the blackboard eraser of dust-absorbing function in use, the noise that induced-draught fan produces is comparatively large, and during blackboard wiping, first must open induced-draught fan, then can blackboard wiping, comparatively loaded down with trivial details.
Summary of the invention
The object of this invention is to provide a kind of quiet electric blackboard eraser, it has the less feature of noise.Further, it also has and uses conveniently feature.
The technical solution adopted in the present invention is: quiet electric blackboard eraser, comprise dust-collecting box, this dust-collecting box is connected with dust exhaust apparatus, and the sidewall of this dust-collecting box is connected with flexible pipe, the other end of this flexible pipe is connected with brush body, this brush body has cleaning part, described dust exhaust apparatus comprises a housing, fan chamber is provided with in this housing, this fan chamber has the openings being communicated with this housing cavity, the bottom of this fan chamber is provided with air inlet, electronic extraction fan is provided with in this fan chamber, this electronic extraction fan is connected to power supply by switch, the sidewall of this housing is provided with exhaust outlet, simultaneously, this hull outside is provided with a noise elimination seat, a noise reduction cavity is provided with in this noise elimination seat, the sidewall of this noise reduction cavity is provided with the air admission hole being communicated to this noise elimination seat outside, return duct is provided with in this noise reduction cavity, the connection return duct that air admission hole is corresponding between two, and air inlet is communicated to this noise reduction cavity, and, the dismountable opening portion being fixed on this dust-collecting box of this housing, and this noise elimination seat is positioned at this dust-collecting box.
The sidewall of described return duct this noise reduction cavity through, air inlet has to outstanding convex edge, the outside of this housing thus is formed with air intake mouth, and air intake mouth is corresponding to be between two opened in return duct.
Dismountablely on described housing be fixed with cover body, the outer end opening of air admission hole is positioned at this cover body.
Dismountablely on described housing be fixed with netted bracing frame, it is outside that this bracing frame covers on this cover body.
Described dust-collecting box opening portion is provided with filter paper.
Described quiet electric blackboard eraser also comprises a hanger, and this brush body and this hanger match.
Described hanger is provided with elastic hook, and this elastic hook links this switch, and this switch is a push switch.
Described switch is furnished with delay circuit breaker.
Described power supply is safety power supply.
The present invention is compared to the prior art advantageously: noise is less, more for convenience.Quiet electric blackboard eraser of the present invention in use, flow through from brush body the air-flow come and first enter return duct through air admission hole, then enter fan chamber by air inlet, finally discharge from exhaust outlet, the flowing being equivalent to air-flow has certain convolution, thus greatly reduces noise.Meanwhile, when brush body hangs on elastic hook, push switch pressurized and short circuit, electronic extraction fan can not work; Otherwise when brush body takes off from elastic hook, push switch pressurized and closing, electronic extraction fan starts.That is, electric exhaust fan and brush body synchronous working, user without the need to first carrying out opening or the step of closed circuit switch, more for convenience.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is the front sectional view of embodiments of the invention;
Fig. 2 is the front views (parts such as not shown flexible pipe, brush body) of embodiments of the invention at decomposing state;
Fig. 3 is the front sectional view of noise elimination seat of the present invention;
Fig. 4 is A-A direction view of Fig. 3;
Fig. 5 is that a left side for brush body of the present invention and hanger cooperation is depending on sectional view (amplifying relative to Fig. 1).
In figure:
Detailed description of the invention
Embodiment, is shown in shown in Fig. 1 and Fig. 2: quiet electric blackboard eraser, comprises dust-collecting box 10.This dust-collecting box 10 is connected with dust exhaust apparatus 20, and the sidewall of this dust-collecting box 10 is connected with flexible pipe 30.The other end of this flexible pipe 30 is connected with brush body 40, and this brush body 40 has cleaning part 41.Obviously, this brush body 40 has the inlet scoop be connected with flexible pipe 30, and this cleaning part 41 is positioned at inlet scoop place.That is, after the work of this dust exhaust apparatus 20, make cleaning part 41 place of this brush body 40 form negative pressure by this flexible pipe 30, thus dust is sucked in this dust-collecting box 10 along this flexible pipe 30.
Further say, this dust exhaust apparatus 20 comprises a housing 21.Fan chamber 211 is provided with in this housing 21.This fan chamber 211 has the openings 212 being communicated with this housing 21 inner chamber.That is, this housing 21 takes shape on a sidewall of the inner chamber of this housing 21.Such as, this fan chamber 211 is for taking shape in the blind hole on the bottom sidewall of this housing 21 inner chamber.The bottom of this fan chamber 211 is provided with air inlet 214.Be provided with electronic extraction fan 22 in this fan chamber 211, this electronic extraction fan 22 is connected to power supply (not shown on figure) by switch 62.That is, after this switch 62 closes and makes this electronic extraction fan 22 be communicated with power supply, this electronic extraction fan 22 works.The sidewall of this housing 21 is provided with exhaust outlet 213.Meanwhile, shown in composition graphs 3 and Fig. 4, this housing 21 outside is provided with a noise elimination seat 23.Be provided with a noise reduction cavity 231 in this noise elimination seat 23, the sidewall of this noise reduction cavity 231 is provided with the air admission hole 232 being communicated to this noise elimination seat 23 outside.Return duct 233 is provided with in this noise reduction cavity 231.The connection return duct 233 that air admission hole 232 is corresponding between two, and air inlet 214 is communicated to this noise reduction cavity 231.That is, after this electronic extraction fan 22 works, the priority of air-flow convolution state enters in this noise reduction cavity 231 through air admission hole 232, return duct 233, then enters fan chamber 211 through air inlet 214, enters this housing 21 afterwards more inner, finally discharge from exhaust outlet 213.And, the dismountable opening portion being fixed on this dust-collecting box 10 of this housing 21, and this noise elimination seat 23 is positioned at this dust-collecting box 10.Like this, after this electronic extraction fan 22 works, the dust at cleaning part 41 place enters in this dust-collecting box 10 along with air-flow, reduces the harm that dust is formed.And air-flow is in convolution state when flowing, thus greatly reduce wind-dryness.
Optimize:
The sidewall of return duct 233 this noise reduction cavity 231 through.That is, return duct 233 has certain length, is such as 3 ~ 8mm.Air inlet 214 has to outstanding convex edge, the outside of this housing 21 thus is formed with air intake mouth 215, and air intake mouth 215 is corresponding to be between two opened in return duct 233.That is, the air intake place being equivalent to air inlet 214 is positioned at the middle part of this return duct 233.Like this, further enhancing the boomerang effect of air-flow, make noise reduction better.
Dismountablely on this housing 21 be fixed with cover body 24, the outer end opening of air admission hole 232 is positioned at this cover body 24; Dismountablely on this housing 21 be fixed with netted bracing frame 25, it is outside that this bracing frame 25 covers on this cover body 24; Dust-collecting box 10 opening portion is provided with filter paper 50.Obviously, this filter paper 50 is inevitable is communicated with between this dust-collecting box 10 part and this dust exhaust apparatus 20 at this flexible pipe 30.Like this, protect electronic parts such as extraction fan 22 grade preferably, and filter paper 50 guarantees that dust is temporary in this dust-collecting box 10, and bracing frame 25 and cover body 24 also define certain support to filter paper 50.
Continue to optimize:
This quiet electric blackboard eraser also comprises a hanger 60, and this brush body 40 and this hanger 60 match.That is, this hanger 60 is fixed on blackboard avris, brush body 40 can be placed in the use so that user takes at any time on this hanger 60.
Shown in composition graphs 5, this hanger 60 is provided with elastic hook 61.Such as, the bottom of this elastic hook 61 is furnished with the stage clip that makes it have the trend of popping up, and obviously, when not using, this brush body 40 is placed on this elastic hook 61.This elastic hook 61 links this switch 62, and this switch 62 is a push switch.Such as, this elastic hook 61 is fixed with the first metal electrode, the second metal electrode that this hanger 60 is provided with and this first metal electrode matches, when this elastic hook 61 pops up because not hanging this brush body 40, this first metal electrode and this second metal electrode form electrical connection.Like this, only when and inevitable when this brush body 40 is not placed on this elastic hook 61, this electronic extraction fan 22 works, and realizes the synchronous of this electronic extraction fan 22 and this brush body 40, greatly facilitates the use of user.
This switch 62 is furnished with delay circuit breaker (not shown on figure).Such as, this brush 40 leaves this elastic hook 61 this electronic extraction fan 22 autostop at once after working three minutes then.
This power supply is safety power supply.That is, the voltage of this power supply is no more than 36V.So, improve the security of this blackboard eraser.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. quiet electric blackboard eraser, comprise dust-collecting box (10), this dust-collecting box (10) is connected with dust exhaust apparatus (20), and the sidewall of this dust-collecting box (10) is connected with flexible pipe (30), the other end of this flexible pipe (30) is connected with brush body (40), this brush body (40) has cleaning part (41), it is characterized in that: described dust exhaust apparatus (20) comprises a housing (21), fan chamber (211) is provided with in this housing (21), this fan chamber (211) has the openings (212) being communicated with this housing (21) inner chamber, the bottom of this fan chamber (211) is provided with air inlet (214), electronic extraction fan (22) is provided with in this fan chamber (211), this electronic extraction fan (22) is connected to power supply by switch (62), the sidewall of this housing (21) is provided with exhaust outlet (213), simultaneously, this housing (21) outside is provided with a noise elimination seat (23), a noise reduction cavity (231) is provided with in this noise elimination seat (23), the sidewall of this noise reduction cavity (231) is provided with and is communicated to the outside air admission hole (232) of this noise elimination seat (23), return duct (233) is provided with in this noise reduction cavity (231), the connection return duct (233) that air admission hole (232) is corresponding between two, and air inlet (214) is communicated to this noise reduction cavity (231), and, the dismountable opening portion being fixed on this dust-collecting box (10) of this housing (21), and this noise elimination seat (23) is positioned at this dust-collecting box (10).
2. quiet electric blackboard eraser according to claim 1, it is characterized in that: the sidewall of through this noise reduction cavity (231) of described return duct (233), air inlet (214) has to outstanding convex edge, the outside of this housing (21) thus is formed with air intake mouth (215), and air intake mouth (215) is corresponding to be between two opened in return duct (233).
3. quiet electric blackboard eraser according to claim 1, it is characterized in that: described housing (21) is above dismountable is fixed with cover body (24), and the outer end opening of air admission hole (232) is positioned at this cover body (24).
4. quiet electric blackboard eraser according to claim 3, it is characterized in that: described housing (21) is above dismountable is fixed with netted bracing frame (25), and it is outside that this bracing frame (25) covers on this cover body (24).
5. quiet electric blackboard eraser according to claim 1, is characterized in that: described dust-collecting box (10) opening portion is provided with filter paper (50).
6. quiet electric blackboard eraser according to any one of claim 1 to 5, is characterized in that: described quiet electric blackboard eraser also comprises a hanger (60), and this brush body (40) and this hanger (60) match.
7. quiet electric blackboard eraser according to claim 6, it is characterized in that: described hanger (60) is provided with elastic hook (61), this elastic hook (61) links this switch (62), and this switch (62) is a push switch.
8. quiet electric blackboard eraser according to claim 6, is characterized in that: described switch (62) is furnished with delay circuit breaker.
9. quiet electric blackboard eraser according to claim 1, is characterized in that: described power supply is safety power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520916349.XU CN205149342U (en) | 2015-11-16 | 2015-11-16 | Silence electric blackboard wipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520916349.XU CN205149342U (en) | 2015-11-16 | 2015-11-16 | Silence electric blackboard wipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205149342U true CN205149342U (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520916349.XU Active CN205149342U (en) | 2015-11-16 | 2015-11-16 | Silence electric blackboard wipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205149342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106114018A (en) * | 2016-07-18 | 2016-11-16 | 万象设计江苏有限责任公司 | A kind of dust-absorbing blackboard |
| CN108297584A (en) * | 2017-12-28 | 2018-07-20 | 广州华夏职业学院 | A kind of classroom special efficient automatic dust-absorbing type blackboard eraser |
-
2015
- 2015-11-16 CN CN201520916349.XU patent/CN205149342U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106114018A (en) * | 2016-07-18 | 2016-11-16 | 万象设计江苏有限责任公司 | A kind of dust-absorbing blackboard |
| CN108297584A (en) * | 2017-12-28 | 2018-07-20 | 广州华夏职业学院 | A kind of classroom special efficient automatic dust-absorbing type blackboard eraser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |