CN2477392Y - Foldable lifting blackboard - Google Patents
Foldable lifting blackboard Download PDFInfo
- Publication number
- CN2477392Y CN2477392Y CN 01222920 CN01222920U CN2477392Y CN 2477392 Y CN2477392 Y CN 2477392Y CN 01222920 CN01222920 CN 01222920 CN 01222920 U CN01222920 U CN 01222920U CN 2477392 Y CN2477392 Y CN 2477392Y
- Authority
- CN
- China
- Prior art keywords
- blackboard
- support frame
- main
- guide rail
- counterweight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model comprises a main blackboard, an auxiliary blackboard, an elevating mechanism and a balance weight. The whole blackboard is supported by a supporting frame which is fixed tightly at the wall and the ground; one side or two sides of the main blackboard are connected respectively with the auxiliary blackboard through hinges; two chains are fixed below the back of the main blackboard, and the other ends of the chains are connected with the balance weight; a horizontal rotating shaft is arranged below a beam of the supporting frame, and two ends of the rotating shaft are both provided with rolling bearings; the inner sides of the rolling bearings are provided with chain wheels, and the chains are arranged at the chain wheels. The utility model has the advantages of simple structure, freedom of folding and elevating, convenience and labor saving, thus is in particular suitable for lecture halls and theatres.
Description
The utility model relates to a kind of teaching equipment, the blackboard of especially collapsible lifting.
At present, along with the develop rapidly of higher cause, improve the usable floor area and the function of blackboard, class is very necessary.Give lessons for one of teacher to write convenient and swift, the world is particularly important flexibly, the liftable blackboard type is a lot of in the prior art, but all there are different defectives, such as complex structure, heaviness etc., the purpose of this utility model just is to overcome above-mentioned defective, and a kind of blackboard of collapsible lifting simple in structure, easy to use is provided.
The purpose of this utility model is achieved in that a kind of blackboard of collapsible lifting, comprise main blackboard, auxiliary blackboard, elevating mechanism and counterweight, be characterized in: whole blackboard is supported by support frame (5), support frame (5) is fastened on wall and the ground, the one or both sides of main blackboard (18) connect auxiliary blackboard (12) by hinge (13) respectively, (10), there is the T-shape groove guide rail (14) of two length that are parallel to each other the behind of main blackboard (18), (17), there is fixed head (6) both sides, support frame (5) top, 4 groups of pulleys (8) are housed respectively on two fixed heads (6), these 4 groups of pulleys (8) embed respectively in T-shape groove guide rail (14) and (17), bottom behind is fixed with two chains (4) at main blackboard (18), the other end of chain (4) connects counterweight (3), there is a horizontal rotating shaft (15) crossbeam below at support frame (5), all there is rolling bearing (16) at the two ends of rotating shaft (15), in the inboard of rolling bearing (16) sprocket wheel (7) is housed, chain (4) rides on the sprocket wheel (7).The spacing damping device of spring (9) is housed in two end slots of T-shape groove guide rail (14) and (17).Counterweight (3) is tetragonal strip, also can be circular, polygonal.
The utlity model has simple in structure, folding lifting freely, convenient and strength-saving advantage, be particularly suitable for auditorium, theatre, aged teacher, old professor can also be seated and write.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1, be the side view of the utility model structure;
Fig. 2, be the vertical view of the utility model structure;
Fig. 3, be the front view of the utility model structure.
Present embodiment comprises main blackboard as seen from the figure, auxiliary blackboard, elevating mechanism and counterweight, whole blackboard is supported by support frame (5), support frame (5) is fastened on wall and the ground, the one or both sides of main blackboard (18) connect auxiliary blackboard (12) by hinge (13) respectively, (10), there is the T-shape groove guide rail (14) of two length that are parallel to each other the behind of main blackboard (18), (17), there is fixed head (6) both sides, support frame (5) top, 4 groups of pulleys (8) are housed respectively on two fixed heads (6), these 4 groups of pulleys (8) embed respectively in T-shape groove guide rail (14) and (17), bottom behind is fixed with two chains (4) at main blackboard (18), the other end of chain (4) connects counterweight (3), there is a horizontal rotating shaft (15) crossbeam below at support frame (5), all there is rolling bearing (16) at the two ends of rotating shaft (15), in the inboard of rolling bearing (16) sprocket wheel (7) is housed, chain (4) rides on the sprocket wheel (7).Support frame (5) is fastened on wall and the ground, support as whole blackboard, guide rail (14), (17), assembly pulley (8) and chain (4), blackboard (18), counterweight (3), sprocket wheel (7), rolling bearing (16) have constituted the transmission mechanism of present embodiment, because the weight of blackboard and the weight balancing effect of counterweight (3), make the mobile ten minutes of blackboard economize in power, only just blackboard can be moved on to the desired position with less power.The counterweight of selecting for use in the present embodiment (3) is tetragonal strip, and its length is slightly less than the width of main blackboard (18).The spacing damping device of spring (9) is housed in two end slots of T-shape groove guide rail (14) and (17), the time rushes out to prevent the blackboard motion, and can also vibration damping.Auxiliary blackboard (12), (10) arbitrarily folding that hinge (13) connects.
Claims (3)
1, a kind of blackboard of collapsible lifting, comprise main blackboard, auxiliary blackboard, elevating mechanism and counterweight, it is characterized in that: whole blackboard is supported by support frame (5), support frame (5) is fastened on wall and the ground, the one or both sides of main blackboard (18) connect auxiliary blackboard (12) by hinge (13) respectively, (10), there is the T-shape groove guide rail (14) of two length that are parallel to each other the behind of main blackboard (18), (17), there is fixed head (6) both sides, support frame (5) top, 4 groups of pulleys (8) are housed respectively on two fixed heads (6), these 4 groups of pulleys (8) embed respectively in T-shape groove guide rail (14) and (17), bottom behind is fixed with two chains (4) at main blackboard (18), the other end of chain (4) connects counterweight (3), there is a horizontal rotating shaft 15 crossbeam below at support frame (5)), all there is rolling bearing (16) at the two ends of rotating shaft (15), in the inboard of rolling bearing (16) sprocket wheel (7) is housed, chain (4) rides on the sprocket wheel (7).
2, the blackboard of collapsible lifting according to claim 1 is characterized in that: the spacing damping device of spring (9) is housed in two end slots of described T-shape groove guide rail (14) and (17).
3, the blackboard of collapsible lifting according to claim 1 is characterized in that: described counterweight (3) is tetragonal strip, also can be circular, polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01222920 CN2477392Y (en) | 2001-04-29 | 2001-04-29 | Foldable lifting blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01222920 CN2477392Y (en) | 2001-04-29 | 2001-04-29 | Foldable lifting blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2477392Y true CN2477392Y (en) | 2002-02-20 |
Family
ID=33639618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01222920 Expired - Fee Related CN2477392Y (en) | 2001-04-29 | 2001-04-29 | Foldable lifting blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2477392Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108260926A (en) * | 2017-11-30 | 2018-07-10 | 广州市百利文仪实业有限公司 | A kind of liftable desk |
-
2001
- 2001-04-29 CN CN 01222920 patent/CN2477392Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108260926A (en) * | 2017-11-30 | 2018-07-10 | 广州市百利文仪实业有限公司 | A kind of liftable desk |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |