CN2176249Y

CN2176249Y - Hanger of chart for teaching

Info

Publication number: CN2176249Y
Application number: CN 93246174
Authority: CN
Inventors: 董浩军
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-16
Filing date: 1993-12-16
Publication date: 1994-09-07
Anticipated expiration: 2003-12-16

Abstract

The utility model discloses a hanger of a chart for teaching, which is composed of a suction head 1, a hook 2 and a clamp 4, wherein, the suction head 1 is a basin-shaped body which is made of elastic material. The back part of the suction head 1 is provided with the hook 2 which is connected with the clamp 4 through a thread rope 3. When the utility model is used, the suction head is pressed slightly only, the suction head can suck on a blackboard firmly under the effect of atmospheric pressure, and a chart is clamped by the clamp. The utility model has the advantages of simple structure, convenient operation, low price and no chart damage.

Description

Hanger of chart for teaching

The utility model relates to a kind of wall chart device of the usefulness of imparting knowledge to students.

School instruction all be unable to do without wall chart from the primary school to the university.But, do not have a kind of wall chart instrument of fairly simple practicality up to now.Traditional method is with drawing pin wall chart to be followed closely on blackboard, to wooden blackboard, though can follow closely at an arbitrary position, but bigger to the infringement of blackboard surface quality, then can only follow closely on the wooden frame of blackboard Glass blackboard, because frame is higher, fix together and require great effort very much, also relatively more difficult when being folded down, be difficult to follow closely to such an extent that live sometimes, perhaps nail is not firm.At all can't be on the blackboard upper side frame to shorter teacher or most of schoolmarm with the wall chart nail, this student that seeks help that just has to.Often see several pupils follows closely wall chart on blackboard frame by chair teacher of the helping and educating in the primary school.Therefore the teaching of low, the weak effect of wall chart method efficient of this backwardness, even influence is normally carried out.In addition, use the drawing pin wall chart, bigger to the drawing damage, general wall chart is have more than is needed just scarred several times, even tear very soon in the bight.

The purpose of this utility model is the problems referred to above that exist in the present teaching of use wall chart, and a kind of school wall map device simple and easy, reliable, cheap, easy to use is provided, and improves teaching condition, improves efficiency of teaching.

The utility model is achieved in that the school wall map device is made of suction nozzle 1, hook 2, clip 4.Suction nozzle 1 is a basin-like body of being made by elastomeric material, and there is a hook 2 at the back of suction nozzle 1, and hook 2 links to each other with clip 4 by cotton rope 3.

The utility model utilizes principle of negative pressure work, during use, suction nozzle 1 is attached on the blackboard exerts pressure slightly, and then the air in the basin of suction nozzle is excluded, this moment suction nozzle under the pressure of atmosphere tightly attached to blackboard on.And then school wall map clipped with clip get final product.Can be with the clamping of two groups of wall chart devices to bigger wall chart.

The utility model has the advantages that simple structure, easy to use, cheap, do not damage blackboard and drawing.

Fig. 1 is the front view of school wall map device;

Fig. 2 is the right side view of school wall map device;

Fig. 3 is the user mode figure of school wall map device.

For improving adsorption effect, suction nozzle 1 basin is along the subtended angle β of the subtended angle α that locates greater than basin, and basin is along the thickness b of the thickness a that locates less than basin.The suction nozzle material is a rubber, also available plastic production.Have hook 5 on the clip 4, cotton rope 3 can be used nylon rope.Hook 2 can insert or be screwed into suction nozzle 1 back by screw thread, also can be cast into suction nozzle 1 back.

Claims

1, a kind of school wall map device is characterized in that this wall chart device is made of suction nozzle (1), hook (2), clip (4); Suction nozzle (1) is a basin-like body of being made by elastomeric material, and there is a hook (2) at the back of suction nozzle (1); Hook (2) links to each other with clip (4) by cotton rope (3).

2, by the described school wall map device of claim 1, it is characterized in that suction nozzle (1) basin along the subtended angle β of the subtended angle α that locates greater than basin, basin is along the thickness b of the thickness a that locates less than basin.