CN204149717U - A kind of reflection prevention blackboard - Google Patents
A kind of reflection prevention blackboard Download PDFInfo
- Publication number
- CN204149717U CN204149717U CN201420572477.2U CN201420572477U CN204149717U CN 204149717 U CN204149717 U CN 204149717U CN 201420572477 U CN201420572477 U CN 201420572477U CN 204149717 U CN204149717 U CN 204149717U
- Authority
- CN
- China
- Prior art keywords
- plate face
- fixed
- rotating shaft
- chute
- braking
- 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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Abstract
The utility model relates to a kind of reflection prevention blackboard, it is characterized in that: this blackboard comprises middle plate face, left plate face, right panel face and chute; Described middle plate face is fixed on chute, and described left plate face and right panel face are connected on described chute by rotating shaft; Described left plate face and right panel face are provided with column frame, and be provided with braking rotating shaft and braking bar in described column frame, its outside is provided with fixed handle; Described braking rotating shaft is fixed with spragging gear; Described braking bar is fixedly connected with the brake handle be located at outside described column frame, and described brake handle stretches into one end fixing with described braking bar in described column frame and is wound with Compress Spring; Be provided with slide block in described chute, described slide block is fixed with hanging stick, the other end of described hanging stick is fixed in described braking rotating shaft.The utility model is not only easy and simple to handle, can effectively prevent and improve the problem that the blackboard reflective light caused due to strong sidelight perplexs front-seat both sides student, and its detachable structure also helps production, stores and transport.
Description
Technical field
The utility model relates to a kind of blackboard, particularly relates to a kind of reflection prevention blackboard.
Background technology
At present, in school classroom education activities, the reflective problem of blackboard annoyings numerous teachers and students always, and the student being especially sitting in front-seat both sides is deeply bitter by it, does not almost see the writing on the blackboard of blackboard opposite side about 1/4 to 1/3.Although there is a kind of curved plate blackboard present stage, the reflective problem of blackboard is had some improvement, but due to its technological deficiency, the irradiation area of strong sidelight after blackboard reflection is still the student of the front-seat both sides of more multi-period covering, thus its result of use is often also unsatisfactory.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of easy and simple to handle, constantly can adjust the propagation path of sidelight after blackboard reflection, thus effectively prevention and improve a kind of reflection prevention blackboard that the blackboard reflective light caused due to strong sidelight perplexs the problem of front-seat both sides student.
For solving the problem, a kind of reflection prevention blackboard described in the utility model, is characterized in that: this blackboard comprises middle plate face, left plate face, right panel face and chute; Described middle plate face is fixed on chute, and the right side in described left plate face and the rotating shaft that passes on left in right panel face are connected on described chute; The described left side in left plate face and the right side in right panel face are provided with column frame, and be provided with braking rotating shaft and braking bar in described column frame, its outside is provided with fixed handle; Described braking rotating shaft is fixed with spragging gear, and described spragging gear is engaged with described braking bar; Described braking bar is fixedly connected with the brake handle be located at outside described column frame, and described brake handle stretches into one end fixing with described braking bar in described column frame and is wound with Compress Spring; Be provided with slide block in described chute, described slide block is fixed with hanging stick, the other end of described hanging stick is fixed in described braking rotating shaft.
The lower limb in described middle plate face, left plate face, right panel face is equipped with horizontal slats.
The region that described fixed handle superposes with described brake handle adopts hollow structure, and described brake handle overlapping portion is in hollow region.
The utility model compared with prior art has the following advantages:.
1, owing to being provided with middle plate face, left plate face, right panel face and chute in the utility model, described middle plate face is fixed on chute, and the right side in described left plate face and the rotating shaft that passes on left in right panel face are connected on described chute.Therefore, can according to strong sidelight come to, by rotating the angle in the left plate face of adjustment or right panel face thus making reflection ray change propagation path according to the reflection law of light, the interference of reflection ray is reduced in injection student region, effectively improves blackboard reflective light problem; Especially can need to adjust plate face according to determining whether with or without strong sidelight, or according to strong sidelight to the adjustment respectively determining left plate face or right panel face, or without during relevant writing on the blackboard without the need to adjusting plate face etc., can effectively reduce because of the protruding impact on teachers and students' activity in portion of Ban Mian district.
2, because the left side in plate face left described in the utility model and the right side in right panel face are provided with column frame, be provided with braking rotating shaft and braking bar in described column frame, its outside is provided with fixed handle; Described braking rotating shaft is fixed with spragging gear, and described spragging gear is engaged with described braking bar; Described braking bar is fixedly connected with the brake handle be located at outside described column frame, and described brake handle stretches into one end fixing with described braking bar in described column frame and is wound with Compress Spring; Be provided with slide block in described chute, described slide block is fixed with hanging stick, the other end of described hanging stick is fixed in described braking rotating shaft.Therefore, when needs adjust left plate face or right panel face, to hold with a firm grip fixed handle and brake handle simultaneously, be pulled outwardly brake handle and braking bar just can be made to leave spragging gear with hand, braking rotating shaft can freely be rotated; Take-off the brake handle after adjusting left plate face or right panel face, braking bar locks spragging gear under the effect of Compress Spring, braking rotating shaft can not be rotated, rotating shaft, between slide block and braking rotating shaft 3, form stable triangular structure, make left plate face or right panel face be in metastable state and not affect use.
3, because the lower limb in plate face middle described in the utility model, left plate face, right panel face is equipped with horizontal slats, therefore, can effectively accept chalk chip and dust, reduce the impact etc. on floor cleaning.
4, the region due to fixed handle described in the utility model superposing with described brake handle adopts hollow structure, described brake handle overlapping portion is in hollow region, therefore, effectively can weaken the swing of brake handle, strengthen braking effect, improve the stability in left plate face and right panel face further.
5, the utility model is not only easy and simple to handle, can effectively prevent and improve the problem that the blackboard reflective light caused due to strong sidelight perplexs front-seat both sides student, and its detachable structure also helps production, stores and transport.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
In figure: 3-right panel face, 2-left plate face, 1-middle plate face, 4-chute 5---rotating shaft 6-column frame 13-slide block 14-hanging stick 15-level is along plate.
Fig. 2 is the structural representation of brake portion.
In figure: 6-column frame, 7-braking rotating shaft, 8-braking bar, 9-fixed handle, 10-spragging gear, 11-brake handle, 12-Compress Spring.
Fig. 3 is the constructional cross sectional view of chute and slide block.
In figure: 4-chute, 13-slide block, 14-hanging stick.
Fig. 4 is the left view of fixed handle in Fig. 2.
Detailed description of the invention
As shown in Figure 1, 2, a kind of reflection prevention blackboard, this blackboard comprises middle plate face 1, left plate face 2, right panel face 3 and chute 4; Described middle plate face 1 is fixed on chute 4, and the right side in described left plate face 2 and the rotating shaft 5 that passes on left in right panel face 3 are connected on described chute 4; The described left side in left plate face 2 and the right side in right panel face 3 are provided with column frame 6, and be provided with braking rotating shaft 7 and braking bar 8 in described column frame 6, its outside is provided with fixed handle 9; Described braking rotating shaft 7 is fixed with spragging gear 10, and described spragging gear 10 is engaged with described braking bar 8; Described braking bar 8 is fixedly connected with the brake handle 11 be located at outside described column frame 6, and described brake handle 11 stretches into one end fixing with described braking bar 8 in described column frame 6 and is wound with Compress Spring 12; Be provided with slide block 13 in described chute 4, described slide block 13 is fixed with hanging stick 14, the other end of described hanging stick 14 is fixed in described braking rotating shaft 7.
The lower limb in described middle plate face 1, left plate face 2, right panel face 3 is equipped with level along plate 15.
The region that described fixed handle 9 superposes with described brake handle 11 adopts hollow structure, and described brake handle 11 overlapping portion is in hollow region.
The two ends of described braking rotating shaft 7 are provided with screw thread and nut, and screw tip rotating shaft is tetragonal prism, and one end that described hanging stick 14 is connected with described braking rotating shaft 7 is provided with cubic borehole jack ring.
The rotating shaft 5 in the described right side in left plate face 2 and the left side in right panel face 3 is rear-mounted rotating shaft, and described chute 4 is provided with the vertical installing hole in described left plate face 2 and right panel face 3.
Fig. 3 is the structural representation of chute and slide block.
Fig. 4 is the left view of fixed handle in Fig. 2.
embodiment 1install.
(1) slide block is placed in chute two ends, gliding groove level is fixed on body of wall appropriate location.
(2) by rotating shaft, left plate face and right panel face are connected on gliding groove, install chute to stablize left plate face and right panel face simultaneously, make gliding groove parallel and justify align.
(3) other end of hanging stick is fixed in braking rotating shaft.
(4) installation fixes middle plate face.
Note: after installation, three pieces of plate faces can be in same plane.
embodiment 2use---in case right strong sidelight is example.
(1) make left plate face and middle plate face at same plane.
(2) to hold with a firm grip the fixed handle in right panel face and brake handle with hand simultaneously, being pulled outwardly brake handle makes braking bar leave spragging gear, braking rotating shaft freely can rotate the angle (slide block moves in chute simultaneously) in rear adjustment right panel face, make the reverberation of the strong sidelight in directive right panel face be basically parallel to left plate face and the injection of middle plate face or not affect student viewing right panel panel book to be advisable, take-off the brake handle after adjusting right panel face, braking bar locks spragging gear under the effect of Compress Spring, makes right panel face be in metastable state.
(3) during anti-cantankerous sidelight, method the same (1) and (2).
(4) if break activity or other reason are without the need to writing on the blackboard or when watching writing on the blackboard, the same (2) method makes three pieces of plate faces be in same plane, then can not impact teachers and students' activity.
Claims (3)
1. a reflection prevention blackboard, is characterized in that: this blackboard comprises middle plate face (1), left plate face (2), right panel face (3) and chute (4); Described middle plate face (1) is fixed on chute (4), and the right side of described left plate face (2) and the rotating shaft (5) that passes on left of right panel face (3) are connected on described chute (4); The described left side of left plate face (2) and the right side of right panel face (3) are provided with column frame (6), and be provided with braking rotating shaft (7) and braking bar (8) in described column frame (6), its outside is provided with fixed handle (9); Described braking rotating shaft (7) is fixed with spragging gear (10), and described spragging gear (10) is engaged with described braking bar (8); Described braking bar (8) be located at described column frame (6) brake handle outward (11) and be fixedly connected with, described brake handle (11) stretches into one end fixing with described braking bar (8) in described column frame (6) and is wound with Compress Spring (12); Be provided with slide block (13) in described chute (4), described slide block (13) be fixed with hanging stick (14), the other end of described hanging stick (14) is fixed on described braking rotating shaft (7).
2. a kind of reflection prevention blackboard as claimed in claim 1, is characterized in that: the lower limb of described middle plate face (1), left plate face (2), right panel face (3) is equipped with horizontal slats (15).
3. a kind of reflection prevention blackboard as claimed in claim 1, is characterized in that: the upper region superposed with described brake handle (11) of described fixed handle (9) adopts hollow structure, and described brake handle (11) overlapping portion is in hollow region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420572477.2U CN204149717U (en) | 2014-10-03 | 2014-10-03 | A kind of reflection prevention blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420572477.2U CN204149717U (en) | 2014-10-03 | 2014-10-03 | A kind of reflection prevention blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204149717U true CN204149717U (en) | 2015-02-11 |
Family
ID=52507863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420572477.2U Expired - Fee Related CN204149717U (en) | 2014-10-03 | 2014-10-03 | A kind of reflection prevention blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204149717U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107914496A (en) * | 2017-11-29 | 2018-04-17 | 朱树彪 | Adjustable cambered surface dustproof blackboard |
| CN108297578A (en) * | 2017-12-28 | 2018-07-20 | 广州华夏职业学院 | A kind of reflection prevention blackboard of height-adjustable type |
| CN109171347A (en) * | 2018-09-13 | 2019-01-11 | 陈益丹 | A kind of bath mirror of the Embedded overturning visual whole body of semi-ring of toilet wall |
-
2014
- 2014-10-03 CN CN201420572477.2U patent/CN204149717U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107914496A (en) * | 2017-11-29 | 2018-04-17 | 朱树彪 | Adjustable cambered surface dustproof blackboard |
| CN108297578A (en) * | 2017-12-28 | 2018-07-20 | 广州华夏职业学院 | A kind of reflection prevention blackboard of height-adjustable type |
| CN109171347A (en) * | 2018-09-13 | 2019-01-11 | 陈益丹 | A kind of bath mirror of the Embedded overturning visual whole body of semi-ring of toilet wall |
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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: 20150211 Termination date: 20151003 |
|
| EXPY | Termination of patent right or utility model |