CN2449932Y

CN2449932Y - Sliding blackboard

Info

Publication number: CN2449932Y
Application number: CN 00251046
Authority: CN
Inventors: 黄绍贤
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-31
Filing date: 2000-08-31
Publication date: 2001-09-26
Anticipated expiration: 2010-08-31

Abstract

The utility model discloses a sliding blackboard which belongs to a teaching blackboard writing device. The utility model is characterized in that the sliding blackboard is composed of slide ways, fixed pulleys, counterweight bodies, and a blackboard, wherein slide blocks arranged at the back of the blackboard are embedded in the two slide ways fixed on a wall, under the action of the fixed pulleys and the counterweight bodies, the blackboard only needs to be lightly pushed by hand, and the blackboard can be freely slid up and down and can be stopped freely; thus, the height of the blackboard can be regulated according to teacher's height and actual requirements, and the labor intensity and the harm of chalk dust to the teacher are reduced; meanwhile, the students' visual capacity can be protected, and the student can not feel exertive for looking at the blackboard because of the height of the teacher's blackboard writing. The material of the sliding blackboard can be obtained easily, and the manufacture is convenient.

Description

Sliding blackboard

The utility model belongs to the teaching board device, particularly is used for a kind of Sliding blackboard of school instruction.

Used blackboard all is the fixing big blackboard that hangs over the place ahead, classroom in the existing large, medium and small school, the word of fixed position appears to have different sensations for the different student in position who sits on the blackboard, owing to the visual angle difference, has to be difficult to differentiate, and it is easy also to distinguish; For the different teacher of stature height, when writing on the blackboard, writing on blackboard top of individual head height is proper, and writing in the blackboard bottom that stature is short is suitable, and therefore, fixed blackboard has correspondingly increased teacher's labour intensity, and is also influential to student's eyesight.

The purpose of this utility model provides a kind of Sliding blackboard, and it can slide up and down according to teacher's will, can alleviate teachers work intensity and the influence that alleviates student eyesight.

The purpose of this utility model is achieved like this: a kind of Sliding blackboard is characterized in that: blackboard slideway 2 is fixed on the body of wall by slideway fixed head 3; Both sides at blackboard 8 back sides are fixed with slide block 1 respectively, and slide block 1 embeds in the slideway 2, and can be free to slide; Between two slideways 2, near the appropriate location of the body of wall of slideway 2, on one side fixed pulley 4 fixing rope 5 is stuck in the groove of fixed pulley 4 on the wall, the following edge at an end and blackboard 8 back sides is fastened, an end is fastened balance weight body 6; On the writing surface of blackboard 8, also be provided with latent lined 7.

The utility model is compared with prior art: the height of blackboard is arbitrarily adjusted in the optimum position when Sliding blackboard can be at teacher's writing on the blackboard, has alleviated teacher's labour intensity, reduces the infringement of chalk dust to the teacher; On the other hand, suitably adjust the blackboard height, can protect students in middle and primary schools' eyesight, prevent anorthopia, the latent bar in the blackboard can help teacher's writing on the blackboard to write neatly, just advising, and the student sees also not hard, helps to improve learning quality.

Below in conjunction with description of drawings, the utility model is further specified.

Fig. 1 is a Sliding blackboard shape and structure schematic diagram.

Fig. 2 is the AA cutaway view of Fig. 1.

Fig. 3 is the another kind of planform figure of slideway.

Figure 1 shows that the shape and structure schematic diagram of Sliding blackboard.It is that slide block 1 on both sides, blackboard 8 back side embeds the slideway 2 that is fixed on the wall, slideway 2 is fixed on the wall by fixed head 3, between slideway 2, is fixed with fixed pulley 4 near appropriate location on the body of wall of slideway 2, rope 5 is stuck in the groove interior (as shown in Figure 2) of fixed pulley 4, one end ties up on blackboard 8 back side lower limbs, and an end has hung balance weight body 6, when needing blackboard movable up and down 8, only with hand promotes blackboard 8 just gently, when shifting the position onto, hand one leaves, and blackboard 8 can stop; The teacher is saying class hour, according to writing laborsaving demand, arbitrarily promotes or the decline blackboard, and the teacher can avoid eating chalk dust like this, can also protect students in middle and primary schools' eyesight simultaneously.Its slideway 2 also has a kind of dovetail groove shape as shown in Figure 3, and slide block 1 also changes accordingly.

Claims

1. Sliding blackboard, it is characterized in that: blackboard slideway (2) is fixed on the body of wall by slideway fixed head (3); Both sides at blackboard (8) back side are fixed with slide block (1) respectively, and slide block (1) embeds in the slideway (2), and can be free to slide; Between two slideways (2), near the appropriate location of the body of wall of slideway (2), on one side a fixed pulley (4) fixing rope (5) is stuck in the groove of fixed pulley (4) on the wall, the following edge at an end and blackboard (8) back side is fastened, an end is fastened balance weight body (6); On the writing surface of blackboard (8), also be provided with latent lined (7).

2. Sliding blackboard according to claim 1 is characterized in that: described slideway (2) also has another shape, is exactly the dovetail groove shape; Its slide block (1) also changes thereupon accordingly.