CN202011277U

CN202011277U - Multifunctional teaching compasses

Info

Publication number: CN202011277U
Application number: CN2011201205335U
Authority: CN
Inventors: 杨楚原; 陈睿; 韩天晓; 黄格; 李岳鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-22
Filing date: 2011-04-22
Publication date: 2011-10-19
Anticipated expiration: 2021-04-22

Abstract

A pair of multifunctional teaching compasses comprises a main shaft with a steel needle at the lower end, wherein a main shaft sleeve is arranged outside the main shaft through a bearing; a balance spring is arranged between the main shaft and the main shaft sleeve; one end of a rotating shaft is articulated with the main shaft sleeve; and a C-shaped sleeve is slidably connected with the rotating shaft. The pair of multifunctional teaching compasses can overcome the shortcomings of the traditional teaching compasses, realize the automatic rotating and circle drawing on the blackboard, have good teaching effect and are fast and convenient. The rotating shaft is articulated with the main shaft sleeve, so that the rotating shaft is folded downward to be butted against the main shaft when the teaching compasses are not used, the size is saved, and the pair of the multifunctional compasses is convenient to store.

Description

Multifunctional teaching compasses

Technical field

The utility model relates to a kind of teaching aid, especially a kind of multifunctional teaching compasses.

Background technology

Educational compasses is widely used in teacher's teaching, is the teaching aid that is absolutely necessary in teacher's routine work.Yet there is simple structure in existing educational compasses, in the shortcoming of blackboard upper drawing circle inconvenient operation, firmly unequal when in the process of drawing, cooperating inconvenience, drafting with ruler and protractor, cause the bead moulding that draws not smooth, easily skid, the waste chalk has influenced teaching efficiency.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of multifunctional teaching compasses simple in structure, can overcome the shortcoming of existing educational compasses, is implemented in to rotate the picture circle automatically on blackboard, and efficient and convenient, teaching efficiency is good.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of multifunctional teaching compasses, the main shaft that comprises lower end band draw point, rack sleeve is contained in outside the main shaft by bearing holder (housing, cover), between main shaft and the rack sleeve hairspring is installed, rotating shaft one end and rack sleeve are hinged, and C jacket tube and rotating shaft are slidingly connected.

C jacket tube upper part diameter is greater than the diameter of bottom, the side of C jacket tube and following open-ended, and spring is equipped with in inside, upper end.

The horizontal device that matches with rotating shaft is installed on the main shaft.

Horizontal device is the lucite pipe that ether and alcohol blend body are housed, and the volume of liquid is 2/3rds of the pipe volume.

Draw point is detachable draw point.

Rotating shaft is provided with scale.

C jacket tube is slidingly connected by the chute in the rotating shaft and pin and rotating shaft.

The multifunctional teaching compasses that the utility model provides, beneficial effect is as follows:

1, owing between main shaft and rack sleeve, hairspring is installed, C jacket tube and rotating shaft are slidingly connected, and the reverse rotation rack sleeve is tightened hairspring, do work to hairspring, after being fixed on main shaft on the blackboard again, hairspring can drive rack sleeve, drives rotating shaft then and rotates on blackboard surface, drives the drawing with coloured chalk circle in the C jacket tube, can overcome the shortcoming of existing educational compasses, be implemented in and rotate the picture circle automatically on blackboard, efficient and convenient, teaching efficiency is good; Rotating shaft and rack sleeve are hinged, are not using under the situation of the present utility model, rotating shaft can be folded near main shaft downwards, have saved volume, convenient collection.

2, the structural design of C jacket tube can overcome the problem of chalk discontinuity, has realized effective utilization of chalk, prevents that it from fractureing.

3, the design of horizontal device can guarantee compasses when rotating all the time perpendicular to blackboard surface, it is effective to draw circle, the efficient height.

4, draw point is detachable draw point, prevents to stab the student, has guaranteed the safety of using.

5, rotating shaft is provided with scale, can read the angle of drawn radius of a circle or circular arc, uses according to the teaching needs, has guaranteed teaching efficiency.

Description of drawings

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

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A-A of the utility model Fig. 1 is to view.

The specific embodiment

As depicted in figs. 1 and 2, the utility model comprises the main shaft 1 of lower end band draw point 10, and rack sleeve 3 is sleeved on outside the main shaft 1 by bearing 9, between main shaft 1 and the rack sleeve 3 hairspring 2 is installed, rotating shaft 5 one ends and rack sleeve 3 are hinged, and C jacket tube 6 is slidingly connected with rotating shaft 5.

C jacket tube 6 upper part diameter are greater than the diameter of bottom, the side of C jacket tube 6 and following open-ended, and spring 7 is equipped with in inside, upper end.

The horizontal device 8 that matches with rotating shaft 5 is installed on the main shaft 1.

Horizontal device 8 is for being equipped with the lucite pipe of ether and alcohol blend body, and the volume of liquid is 2/3rds of the pipe volume.

Draw point 10 is detachable draw point.

Rotating shaft 5 is provided with scale.

C jacket tube 6 is slidingly connected with rotating shaft 5 by chute in the rotating shaft 5 and pin 11.

During use, chalk 4 is installed in the C jacket tube 6, user one holds main shaft 1, another hand backward rotation rack sleeve 3 is tightened hairspring 2, then main shaft 1 is fixed on the blackboard, hairspring 2 can drive rack sleeve 3, drives rotating shaft 5 then and rotates on blackboard surface, drives chalk 4 from the animation circle.

In use, whether the liquid levels in the eye-level device 8 are in level, be in level can guarantee compasses when rotating all the time perpendicular to blackboard surface.

Claims

1. multifunctional teaching compasses, the main shaft (1) that comprises lower end band draw point (10), it is characterized in that: rack sleeve (3) is sleeved on outside the main shaft (1) by bearing (9), between main shaft (1) and the rack sleeve (3) hairspring (2) is installed, rotating shaft (5) one ends and rack sleeve (3) are hinged, and C jacket tube (6) is slidingly connected with rotating shaft (5).

2. multifunctional teaching compasses according to claim 1 is characterized in that: C jacket tube (6) upper part diameter is greater than the diameter of bottom, the side of C jacket tube (6) and following open-ended, and spring (7) is equipped with in inside, upper end.

3. multifunctional teaching compasses according to claim 1 is characterized in that: the horizontal device (8) that matches with rotating shaft (5) is installed on the main shaft (1).

4. multifunctional teaching compasses according to claim 3 is characterized in that: horizontal device (8) is for being equipped with the lucite pipe of ether and alcohol blend body, and the volume of liquid is 2/3rds of the pipe volume.

5. multifunctional teaching compasses according to claim 1 is characterized in that: draw point (10) is detachable draw point.

6. multifunctional teaching compasses according to claim 1 is characterized in that: rotating shaft (5) is provided with scale.

7. multifunctional teaching compasses according to claim 1 is characterized in that: C jacket tube (6) is slidingly connected with rotating shaft (5) by chute in the rotating shaft (5) and pin (11).