CN201304810Y

CN201304810Y - Blackboard

Info

Publication number: CN201304810Y
Application number: CNU200820222268XU
Authority: CN
Inventors: 王彭; 李百灵
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-17
Filing date: 2008-10-17
Publication date: 2009-09-09
Anticipated expiration: 2018-10-17

Abstract

The utility model relates to a blackboard which can move up and down and can roll back and forth. The blackboard consists of a board core, a board frame, a sprocket wheel and a chain, wherein the chain is fixedly connected with the end surfaces of both ends of the board core; the end surfaces of the top left corner and the lower right corner of the board core are fixedly connected with a roller wheel; the center of the medial surface of both ends of the board frame is movably connected with a shaft; and both ends of the shaft are fixedly connected with the sprocket wheel engaged with the chain. A racetrack orbit groove matched with the shape and the size of the roller wheel is arranged on the inner end surface of the top left part and the top right part; the roller wheel is movably connected with the orbit groove. The utility model is widely suitable for study in colleges, middle schools, primary schools, various training classes and study classes.

Description

Blackboard

Technical field

The utility model relates to a kind of blackboard, especially can either move up and down blackboard that again can scroll forward and backward.

Background technology

At present, known blackboard can only move up and down, and pull down with more upwards pushing away.

Summary of the invention

In order to overcome the deficiency of existing blackboard, the utility model provides a kind of blackboard, and this blackboard is to move up and down easily with crank, scroll forward and backward.

The new solution that its technical problem that solves the utility model adopts is: the blackboard of being made up of plate core, sheet frame, sprocket wheel, chain.Fixedly connected chain 3 on described plate core 1,1 ' two end surface, fixedly connected roller is 7 on plate core 1,1 ' upper left corner, the lower right corner end face.Medial surface center, described sheet frame 2 two flexibly connecting the axle 5, the axle 5 two fixedly connected the sprocket wheel 4 that is meshed with chain 3.The inner face of sheet frame 2 upper left quarters, right lower quadrant is provided with and roller 7 shapes, the corresponding runway shape rail groove 6 of size, and roller 7 is movably connected in the rail groove 6.Axle 5 is connected on the conical gear 8, and conical gear 8 is movably connected on turbine 12, the worm screw 11, worm screw 11 be movably connected in conical gear 8 ' on, conical gear 8 ' on connecting crank 9, flexibly connecting handle 10 on the crank 9.

The beneficial effects of the utility model are to use the crank convenience, flexibly, effortlessly blackboard is moved up and down, scroll forward and backward.

Description of drawings

Fig. 1 is a perspective view of the present utility model;

Fig. 2 is the drive mechanism schematic diagram of Fig. 1;

Among the figure, 1,1 ' plate core 2, sheet frame 3, chain 4, sprocket wheel 5, axle 6, rail groove 7, roller 8,8 ' conical gear 9, crank 10, handle 11, worm screw 12, turbine

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

In Fig. 1, the blackboard of forming by plate core, sheet frame, sprocket wheel, chain.Fixedly connected chain 3 on plate core 1,1 ' two end surface, fixedly connected roller is 7 on plate core 1,1 ' upper left corner, the lower right corner end face.Medial surface center, sheet frame 2 two flexibly connecting the axle 5, the axle 5 two fixedly connected the sprocket wheel 4 that is meshed with chain 3.Sheet frame 2 upper left quarters, the inner face of right lower quadrant are provided with and roller 7 shapes, the corresponding runway shape rail groove 6 of size, and roller 7 is movably connected in the rail groove 6.

In Fig. 2, axle 5 is connected on the conical gear 8, and conical gear 8 is movably connected on turbine 12, the worm screw 11, worm screw 11 be movably connected in conical gear 8 ' on, crank 9 be connected conical gear 8 ' on, flexibly connecting handle 10 on the crank 9.

Claims

1, a kind of blackboard, by the plate core, sheet frame, sprocket wheel, chain is formed, it is characterized in that: described plate core (1,1 ') fixedly connected chain (3) on two end surfaces, plate core (1,1 ') upper left corner, on the end face of the lower right corner fixedly connected roller (7), medial surface center, described sheet frame (2) two flexibly connecting the axle (5), the axle (5) two fixedly connected the sprocket wheel (4) that is meshed with chain (3), sheet frame (2) upper left quarter, the inner face of right lower quadrant is provided with and roller (7) shape, the corresponding runway shape rail groove (6) of size, roller (7) is movably connected in the rail groove (6).

2, blackboard according to claim 1, it is characterized in that: described axle (5) is connected on the conical gear (8), conical gear (8) is movably connected in turbine (12), on the worm screw (11), worm screw (11) is movably connected on the conical gear (8 '), connect crank (9) on the conical gear (8 '), flexibly connecting handle (10) on the crank (9).