CN203637398U - Novel lifting blackboard capable of switching between front position and rear position and erasing dust quickly - Google Patents
Novel lifting blackboard capable of switching between front position and rear position and erasing dust quickly Download PDFInfo
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- CN203637398U CN203637398U CN201320826563.7U CN201320826563U CN203637398U CN 203637398 U CN203637398 U CN 203637398U CN 201320826563 U CN201320826563 U CN 201320826563U CN 203637398 U CN203637398 U CN 203637398U
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- blackboard
- gear
- transposition
- ratchet
- rack
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Abstract
The utility model discloses a novel lifting blackboard capable of switching between a front position and a rear position and erasing dust quickly. The novel lifting blackboard is composed of two blackboard bodies, flexible racks, fixed supporting frames, one-way gear mechanisms, a front position and rear position switching device and an eraser device. The flexible racks are installed on the front side of the left edge and the front side of the right edge of each blackboard body. Ordinary racks are installed on the left side face and the right side face of each blackboard body. The one-way gear mechanisms are installed on the fixed supporting frames, and a gear and a tensioning wheel are installed between the supporting frames in a crossing mode. The novel lifting blackboard is mainly used for assisting teachers in teaching activities, switching between the front position and the rear position and the lifting motion of the blackboard are realized, and the dust is erased automatically and quickly in the lifting process; time for erasing the whole blackboard is shortened, and the teaching efficiency of the teachers is improved; the chalk dust generated in the erasing process is distributed between the two blackboard bodies rather than fly in a classroom, so that chronic injuries of the chalk dust to the teachers and students are reduced, the teaching environment is improved, and teaching quality is improved.
Description
Technical field
The utility model belongs to teaching aid technical field, particularly relates to a kind of front and back transposition lift and fast wipe the new type blackboard of dust.
Background technology
Existing machine learning great majority are all fixed blackboards, also have type of push and pull up down blackboard, and type of push and pull up down blackboard mainly adopts the mechanism of fixed pulley and rope, but this mechanism driving is unstable.In addition, often need erasing blackboard when teacher's teaching, the chalk dust of generation can fly upward in the inside, classroom, is a serious threat to the healthy of teacher and classmates.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of front and back transposition lift fast to wipe the new type blackboard of dust.
For realizing above-mentioned utility model object, the technical solution adopted in the utility model is:
Front and back transposition lift is fast wiped a new type blackboard for dust, comprises the first blackboard, the second blackboard, the first flexible rack, two end to end the second flexible racks, fixing support rack, ratchet mechanism, front and back transposer and board wiping devices, described the first blackboard, the second blackboard the right and left installed in front have the first flexible rack of complete cycle, the left and right side of described the first blackboard, the second blackboard is respectively provided with the common tooth bar of strip, fixing support rack two ends are respectively provided with four ratchet mechanisms, described ratchet mechanism is meshed with described common tooth bar, described fixing support rack upper end and lower end have respectively been horizontally disposed with two and have been parallel to each other and cogged gear shaft is installed at two ends, article two, the second flexible rack winding on described gear and regulating wheel and respectively with described the first blackboard, the first flexible rack on the second blackboard is meshed, described front and back transposer and board wiping device are flatly arranged on the stage casing of fixing support rack across ground, transposer two ends before and after described transposition gear is arranged on, described board wiping device is collodion rub piece, be arranged between the transposition gear of front and back transposer.
Further, two are parallel to each other and the tensioning shaft that is also horizontally disposed with two ends between cogged gear shaft and is provided with regulating wheel is installed at two ends.
Further, described ratchet mechanism comprises two coaxial ratchets, described ratchet comprises outer sleeve and the inner sleeve of matched in clearance, outer sleeve is the gear that endoporus is provided with ratchet, inner sleeve is fastened on fixing support rack fixed axis by key, by lock pawl alignment pin, two rotating lock pawls are respectively housed in the axial both sides of inner sleeve, on described lock pawl, are provided with spring holder, by spring is set, lock pawl and ratchet are kept in touch.
Blackboard selects surface to scribble the fiberglass base material of wear-resistant coating, Portable durable; When mounted, allow two blackboards and ratchet mechanism and front and back transposition gear engages, can correct engagement when guaranteeing lifting and to replace.
Preferably, fixing support rack is across being installed with eight gears and eight regulating wheels, and top and the bottom are all four, eight gears and flexible rack engaged transmission, flexible rack simultaneously with the flexible rack engaged transmission of blackboard, regulating wheel plays and changes flexible rack rotation direction and the effect of transmission continuously; In the middle of bracing frame, realize across being provided with device and the board wiping device before and after blackboard, changed; The ratchet mechanism of engaging with blackboard left and right side tooth bar is installed on each bracing frame, and this mechanism has two, and the blackboard that makes to be positioned at above can only move downward, and the blackboard being positioned at below can only move upward.
Preferably, board wiping device is a collodion rub piece, in the time of blackboard lifting, and two blackboards in front and back extruding collodion rub piece, thus the whole face of blackboard is below wiped totally, and the chalk dust of erase process generation can not fly upward everywhere.
Realize the front and back transposer replacing before and after blackboard and comprise two coaxial transposition gears, can use flexibly: while transposition before and after not needing, transposition gear and blackboard flexible rack engaged transmission, blackboard transposition occurs can prevent from writing time; While transposition before and after blackboard is wanted, blackboard is above moved to bottom, at this moment the flexible rack that is positioned at the flexible rack at blackboard top, front lower place and is positioned at back upper place blackboard bottom just engages with transposition gear, only the blackboard being positioned at above need to be pressed in to the inside, under the drive of transposition gear, can realize the front and back transposition of blackboard.
Compared with prior art, the beneficial effects of the utility model are: the utility model is by the transmission of flexible rack, gear, ratchet, and the flexible use of front and back transposer, realize lifting and the front and back transposition of blackboard, operation principle is simple, and transmission is convenient, makes blackboard become more flexible; In the process of blackboard lifting, realize the function of auto-erasing, saved the time of wiping monoblock blackboard, improved the efficiency that teacher gives lessons; The chalk dust that erase process produces is distributed between two blackboards and can in classroom, fly upward, and has reduced the chronic injury of chalk dust to teacher and classmate, has improved teaching environment, has improved quality of instruction.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, utility model object of the present utility model is described in further detail.
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the structural representation of the utility model blackboard.
Fig. 3 is the structural representation that the utility model removes two blackboards and flexible rack.
Fig. 4 is that schematic diagram is looked on a left side of the present utility model.
Fig. 5 is ratchet exploded perspective view of the present utility model.
Fig. 6 is ratchet schematic side view of the present utility model.
Shown in figure, be: 1-the first blackboard; 11-the second blackboard; 101-fixing support rack; 161-fixed axis, 171-spring, 191 keys; The common tooth bar of 2-; 201-ratchet mechanism; 202-spring holder; 204 inner sleeves; 206-lock pawl alignment pin; 207-outer sleeve; 208-lock pawl; 31-collodion rub piece; 321-gear; 331-regulating wheel; 4-the first flexible rack; 41-the second flexible rack; 401 transposition gears.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, utility model object of the present utility model is described in further detail, embodiment can not repeat one by one at this, but therefore embodiment of the present utility model is not defined in following examples.
As shown in Figures 1 to 6, transpositions lift in front and back is fast wiped a new type blackboard for dust, comprises the first blackboard 1, the second blackboard 11, the first flexible rack 4, two end to end the second flexible racks 41, fixing support rack 101, ratchet mechanism 201, front and back transposer and board wiping devices, described the first blackboard 1, the second blackboard 11 the right and left installed in front have the first flexible rack 4 of complete cycle, the left and right side of described the first blackboard, the second blackboard is respectively provided with the common tooth bar of strip, fixing support rack 101 two ends are respectively provided with four ratchet mechanisms, described ratchet mechanism is meshed with described common tooth bar, described fixing support rack upper end and lower end are respectively horizontally disposed with two and are parallel to each other and two ends are provided with the gear shaft of gear 321, article two, the second flexible rack 41 windings on described gear 321 and regulating wheel 331 and respectively with described the first blackboard 1, the first flexible rack 4 on the second blackboard 11 is meshed, described front and back transposer and board wiping device are flatly arranged on the stage casing of fixing support rack 101 across ground, transposer two ends before and after described transposition gear 401 is arranged on, described board wiping device is collodion rub piece 31, be arranged between the transposition gear 401 of front and back transposer.
Article two, be parallel to each other and two ends are provided with the tensioning shaft that is also horizontally disposed with two ends between the gear shaft of gear 321 and is provided with regulating wheel 331.
As shown in Figure 5 and Figure 6, described ratchet mechanism comprises two coaxial ratchets, described ratchet comprises outer sleeve 207 and the inner sleeve 204 of matched in clearance, outer sleeve 207 is provided with the gear of ratchet for endoporus, inner sleeve 204 is fastened on fixing support rack 101 fixed axis 161 by key 191, by lock pawl alignment pin 206, two rotating lock pawls 208 are respectively housed in the axial both sides of inner sleeve 204, on described lock pawl 208, be provided with spring holder 202, by spring 171 is set, lock pawl 208 and ratchet kept in touch.
Before specific embodiment is positioned at blackboard 1, blackboard 11 is positioned at below and is described.
Realize the lifting of blackboard, under the effect in ratchet mechanism 201, can only pull the first blackboard 1 being positioned at above to move downward, therefore, under the transmission of the second flexible rack 41 and transposition gear 401, pull the second blackboard 11 to move upward, and the effect that the second blackboard 11 moves downward that limits is played by all the other ratchet mechanisms 201, thereby realized the lifting of blackboard.
Realize the transposer two ends, front and back of replacing before and after blackboard and be coaxially arranged with transposition gear 401, transposition gear 401 can use flexibly, while transposition before and after not needing,, there is blackboard transposition in transposition gear 401 and the first flexible rack 4 engaged transmission can prevent from writing time; While transposition before and after blackboard is wanted, the first blackboard 1 is above moved to bottom, at this moment first flexible rack 4 at the first blackboard 1 top and the flexible rack 4 of the second blackboard 11 bottoms all just engage with transposition gear 401, only the first blackboard 1 need to be pressed in to the inside, under the rotation of transposition gear 401, can realize the front and back transposition of blackboard.
In the time of blackboard lifting, two of front and back blackboard extruding collodion rub piece 31, thus the whole face of the second blackboard 11 is below wiped totally, and the chalk dust that erase process produces can not fly upward everywhere.
The first blackboard 1 and the second blackboard 11 select surface to scribble the fiberglass base material of wear-resistant coating, Portable durable; When mounted, allow two blackboards forward lap, and engage with ratchet mechanism 201 and transposition gear 401, can correct engagement when guaranteeing lifting and transposition.
Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of the utility model claim.
Claims (3)
1. transposition lift is fast wiped the new type blackboard of dust before and after one kind, it is characterized in that: comprise the first blackboard (1), the second blackboard (11), the first flexible rack (4), article two, end to end the second flexible rack (41), fixing support rack (101), ratchet mechanism (201), front and back transposer and board wiping device, described the first blackboard (1), the second blackboard (11) the right and left installed in front have first flexible rack (4) of complete cycle, described the first blackboard (1), the left and right side of the second blackboard (11) is respectively provided with the common tooth bar of strip (2), fixing support rack (101) two ends are respectively provided with four ratchet mechanisms (201), described ratchet mechanism (201) is meshed with described common tooth bar (2), described fixing support rack (101) upper end and lower end are respectively horizontally disposed with two and are parallel to each other and two ends are provided with the gear shaft of gear (321), article two, the second flexible rack (41) winding at described gear (321) and regulating wheel (331) upper and respectively with described the first blackboard (1), the first flexible rack (4) on the second blackboard (11) is meshed, described front and back transposer and board wiping device are flatly arranged on the stage casing of fixing support rack (101) across ground, transposer two ends before and after described transposition gear (401) is arranged on, described board wiping device is collodion rub piece (31), be arranged between the transposition gear (401) of front and back transposer.
2. transposition lift in a kind of front and back according to claim 1 is fast wiped the new type blackboard of dust, it is characterized in that: two are parallel to each other and two ends are provided with the tensioning shaft that is also horizontally disposed with two ends between the gear shaft of gear (321) and is provided with regulating wheel (331).
3. a kind of front and back transposition lift according to claim 2 is fast wiped the new type blackboard of dust, it is characterized in that: described ratchet mechanism (201) comprises two coaxial ratchets, described ratchet comprises outer sleeve (207) and the inner sleeve (204) of matched in clearance, outer sleeve (207) is provided with the gear of ratchet for endoporus, inner sleeve (204) is fastened on fixing support rack (101) fixed axis (161) by key (191), axially by lock pawl alignment pin (206), two rotating lock pawls (208) are respectively housed in both sides at inner sleeve (204), on described lock pawl (208), be provided with spring holder (202), by spring (171) is set, lock pawl (208) and ratchet are kept in touch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320826563.7U CN203637398U (en) | 2013-12-16 | 2013-12-16 | Novel lifting blackboard capable of switching between front position and rear position and erasing dust quickly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320826563.7U CN203637398U (en) | 2013-12-16 | 2013-12-16 | Novel lifting blackboard capable of switching between front position and rear position and erasing dust quickly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203637398U true CN203637398U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320826563.7U Withdrawn - After Issue CN203637398U (en) | 2013-12-16 | 2013-12-16 | Novel lifting blackboard capable of switching between front position and rear position and erasing dust quickly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203637398U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692826A (en) * | 2013-12-16 | 2014-04-02 | 华南理工大学 | Novel lift type blackboard capable of changing front and back positions and quickly wiping off dust |
| CN104985955A (en) * | 2015-06-17 | 2015-10-21 | 南京工业职业技术学院 | Intelligent blackboard |
| CN112455128A (en) * | 2020-11-25 | 2021-03-09 | 安徽文香信息技术有限公司 | Mounting structure based on over-and-under type wisdom blackboard |
-
2013
- 2013-12-16 CN CN201320826563.7U patent/CN203637398U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692826A (en) * | 2013-12-16 | 2014-04-02 | 华南理工大学 | Novel lift type blackboard capable of changing front and back positions and quickly wiping off dust |
| CN103692826B (en) * | 2013-12-16 | 2015-08-26 | 华南理工大学 | A kind of front and back transposition lift fast wipes the blackboard of dust |
| CN104985955A (en) * | 2015-06-17 | 2015-10-21 | 南京工业职业技术学院 | Intelligent blackboard |
| CN112455128A (en) * | 2020-11-25 | 2021-03-09 | 安徽文香信息技术有限公司 | Mounting structure based on over-and-under type wisdom blackboard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140611 Effective date of abandoning: 20150826 |
|
| RGAV | Abandon patent right to avoid regrant |