CN203780135U - Three-surface multi-purpose blackboard - Google Patents

Three-surface multi-purpose blackboard Download PDF

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Publication number
CN203780135U
CN203780135U CN201420137912.9U CN201420137912U CN203780135U CN 203780135 U CN203780135 U CN 203780135U CN 201420137912 U CN201420137912 U CN 201420137912U CN 203780135 U CN203780135 U CN 203780135U
Authority
CN
China
Prior art keywords
blackboard
central shaft
plain block
gear
spring
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
Application number
CN201420137912.9U
Other languages
Chinese (zh)
Inventor
陈亚琦
Original Assignee
陈亚琦
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 陈亚琦 filed Critical 陈亚琦
Priority to CN201420137912.9U priority Critical patent/CN203780135U/en
Application granted granted Critical
Publication of CN203780135U publication Critical patent/CN203780135U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a three-surface multi-purpose blackboard which comprises three blackboard frames, blackboards, flat clamping blocks, pull rods, central shafts, springs, racks and gears, wherein blackboards are arranged between every two adjacent blackboard frames; the pull rods are arranged in one surface of the middle blackboard frame; the flat clamping blocks, the springs, the racks and the gears are arranged in the middle blackboard frame; the central shafts are arranged in the centers of the blackboards; the pull rods and the springs are arranged on one sides of the flat clamping blocks; the racks are arranged on the other sides of the flat clamping blocks; the gears are arranged at one ends of the central shafts and at the lower ends of the racks. The three-surface multi-purpose blackboard has the advantages that the usable area of the three-surface multi-purpose blackboard can be enlarged by rotating the blackboards; the white surfaces of the blackboards can serve as a projection plane by rotating the blackboards directly; the structure is simple; the use is convenient; the practicability is high.

Description

Three formulas can multiplex blackboard
Technical field
The utility model relates to a kind of blackboard, and especially a kind of three formulas can multiplex blackboard.
Background technology
Blackboard, not strange concerning everybody, concerning student and teacher, blackboard is almost study or the required necessary article of imparting knowledge to students especially, we will arrive on blackboard and write every day; In senior middle school, it is full that teacher often can write blackboard, and sometimes write expired write before all also will wiping again not and then continue to write, apparent, the area of blackboard is inadequate to high school teachers; In university, teacher writes few on blackboard, is all many times the projecting apparatus of use, and projecting apparatus need to project on a white cloth and just can show, be often before class that piece cloth to be lowered, go up again after class, wasted the time also cumbersome.
If we can increase the area of blackboard, make many writing of possibility unexpectedly on blackboard, if can make projecting apparatus directly project on blackboard, save the trouble of projection cloth simultaneously, such this blackboard is not only applicable to teaching of senior high school, is applicable to university yet.
Utility model content
In order to overcome the deficiency of above-mentioned existing product, the purpose of this utility model is to provide a kind of three formulas can multiplex blackboard, it adopts and is provided with blackboard frame at blackboard two ends, simultaneously, blackboard frame is provided with pull bar, spring and folder plain block, in the middle of blackboard, be provided with central shaft, axle is provided with gear and tooth bar, thereby pulls pull bar to rotate the rotation of drive blackboard by driven gear.
In order to realize the technical scheme that the purpose of this utility model adopts be: a kind of three formulas can multiplex blackboard, it is characterized in that: it is made up of blackboard frame, blackboard, folder plain block, pull bar, central shaft, spring, rack and pinion; Described blackboard frame has three, between every two, is provided with blackboard, and blackboard frame mid portion surface is provided with pull bar, and inside is provided with folder plain block, spring, gear and tooth bar; Described blackboard center is provided with central shaft, and every blackboard is all Mitsubishi's cylindricality; Described folder plain block one side is provided with pull bar and spring, and one side is provided with tooth bar; Described central shaft one end is provided with gear; Described tooth bar lower end is provided with gear.
The beneficial effects of the utility model are: it can increase by Rotary Blackboard face the usable floor area of blackboard, can directly turn to again white face when perspective plane is used; And simple in structure, easy to use, practical.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Fig. 1 is the utility model structure chart
Fig. 2 is the utility model right view partial sectional view
Fig. 3 is the utility model left view partial sectional view
1-blackboard frame, 2-blackboard, 3-folder plain block, 4-pull bar, 5-central shaft, 6-spring, 7-tooth bar, 8-gear in figure.
Detailed description of the invention
In the first embodiment shown in Fig. 1, Fig. 2, Fig. 3, a kind of three formulas can multiplex blackboard, it is characterized in that: it is made up of blackboard frame, blackboard, folder plain block, pull bar, central shaft, spring, rack and pinion; Described blackboard frame has three, between every two, is provided with blackboard, and blackboard frame mid portion surface is provided with pull bar, and inside is provided with folder plain block, spring, gear and tooth bar; Described blackboard center is provided with central shaft, and every blackboard is all Mitsubishi's cylindricality; Described folder plain block one side is provided with pull bar and spring, and one side is provided with tooth bar; Described central shaft one end is provided with gear; Described tooth bar lower end is provided with gear.
In the second embodiment shown in Fig. 1, Fig. 2, Fig. 3, described blackboard and central shaft are fixed, and can rotate with central shaft, have one side for white in three, blackboard, during as projection, use, and two sides is used for writing in addition; Described folder plain block is connected and fixes with spring, pull bar and tooth bar, pulls pull bar, and folder plain block moves, and spring is compressed, and the tooth bar of another side moves simultaneously, and each folder plain block can squeeze a flat blackboard; Described pull bar is used for pulling folder plain block, and each pull bar can pull a folder plain block; Described central shaft end and gear centre are fixed, and the other end and blackboard frame can relatively rotate, and when central shaft is rotated, can drive blackboard to rotate; Described spring rebound clip plain block and blackboard frame, each folder plain block is provided with two springs; Described rack and pinion engagement, tooth bar moves and can rotate by driven gear; Described gear is divided into gear wheel and pinion, and pinion is located at gear wheel inside, and is meshed with gear wheel, the inner helical gear end of gear wheel is flexible, pull after pull bar, gear can stop to certain position after rotating, and makes gear can not be inverted to initial position.
While using the utility model, first pull pull bar, flatten after blackboard, on blackboard, write, if when blackboard surface is inadequate, can pull pull bar, make blackboard turn to another side, continue to write; If desired, while using projecting apparatus, all blackboard white faces are drawn to outermost.

Claims (6)

1. three formulas can a multiplex blackboard, it is characterized in that: it is made up of blackboard frame, blackboard, folder plain block, pull bar, central shaft, spring, rack and pinion; Described blackboard frame has three, between every two, is provided with blackboard, and blackboard frame mid portion surface is provided with pull bar, and inside is provided with folder plain block, spring, gear and tooth bar; Described blackboard center is provided with central shaft, and every blackboard is all Mitsubishi's cylindricality; Described folder plain block one side is provided with pull bar and spring, and one side is provided with tooth bar; Described central shaft one end is provided with gear; Described tooth bar lower end is provided with gear.
2. three formulas according to claim 1 can multiplex blackboard, it is characterized in that: described blackboard and central shaft are fixed, and can rotate with central shaft, in three, blackboard, has one side for white.
3. three formulas according to claim 1 can multiplex blackboard, it is characterized in that: described folder plain block is connected and fixes with spring, pull bar and tooth bar, and each folder plain block can squeeze a flat blackboard.
4. three formulas according to claim 1 can multiplex blackboard, it is characterized in that: described central shaft end and gear centre are fixed, and the other end and blackboard frame can relatively rotate.
5. three formulas according to claim 1 can multiplex blackboard, it is characterized in that: described spring rebound clip plain block and blackboard frame, each folder plain block is provided with two springs.
6. three formulas according to claim 1 can multiplex blackboard, it is characterized in that: described rack and pinion engagement.
CN201420137912.9U 2014-03-26 2014-03-26 Three-surface multi-purpose blackboard Expired - Fee Related CN203780135U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420137912.9U CN203780135U (en) 2014-03-26 2014-03-26 Three-surface multi-purpose blackboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420137912.9U CN203780135U (en) 2014-03-26 2014-03-26 Three-surface multi-purpose blackboard

Publications (1)

Publication Number Publication Date
CN203780135U true CN203780135U (en) 2014-08-20

Family

ID=51316354

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420137912.9U Expired - Fee Related CN203780135U (en) 2014-03-26 2014-03-26 Three-surface multi-purpose blackboard

Country Status (1)

Country Link
CN (1) CN203780135U (en)

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140820

Termination date: 20160326

CF01 Termination of patent right due to non-payment of annual fee