CN200941255Y

CN200941255Y - Teaching aid capable of changing centroid

Info

Publication number: CN200941255Y
Application number: CN 200620045395
Authority: CN
Inventors: 周文怡
Original assignee: Kongjiang Ercun Primary School Shanghai Branch
Current assignee: Kongjiang Ercun Primary School Shanghai Branch
Priority date: 2006-08-31
Filing date: 2006-08-31
Publication date: 2007-08-29
Anticipated expiration: 2016-08-31

Abstract

The utility model discloses a teaching aid which can change the center of gravity and comprises a support bar, a connecting device and a blade, wherein the connecting device can be in sliding connection with the support bar and the blade is in fixed connection with the connecting device. The utility model is characterized in that: the blades are two which symmetrically distribute around the support bar. The teaching aid which can change the center of gravity of the utility model has simple fabrication process and can be made by students by hands, which can stimulate fully the interest and enthusiasm of students.

Description

Can change the teaching aid of center of gravity

Technical field

The utility model relates to a kind of teaching aid, especially relates to a kind of teaching aid that changes center of gravity.

Background technology

At present, middle and primary schools give a lesson in the process, relate to the course of center of gravity content, need show the relevant principle of center of gravity to the student by teaching aid, the existing teaching aids making complex process of using, and the student can't take action on one's own to make, and uses inconvenient.

The utility model content

The purpose of this utility model mainly is the teaching aids making complex process according to displaying center of gravity of the prior art, and the deficiency that can't be started to make by the student provides a kind of manufacture craft simple, can be by the take action on one's own teaching aid of the changed center of gravity of making of student.

For realizing above purpose, the utility model is achieved through the following technical solutions:

Can change the teaching aid of center of gravity, comprise support bar, coupling arrangement and blade, coupling arrangement slidably are connected on the support bar, and blade is fixedlyed connected with coupling arrangement.

Preferably, described blade is two, is that the center is symmetrically distributed with the support bar.

Preferably, described blade is four, is that the center is symmetrically distributed with the support bar.

The teaching aid of the changed center of gravity in the utility model, manufacture craft is simple, can be started to make by the student, can give full play to student's interest and enthusiasm.

Description of drawings

Fig. 1 is the structural representation of the utility model first embodiment;

Fig. 2 is the structural representation of the utility model second embodiment.

Embodiment

Below in conjunction with accompanying drawing specific embodiment of the utility model is done detailed description:

Be illustrated in figure 1 as first embodiment of the present utility model, can change the teaching aid of center of gravity, comprise support bar 1, coupling arrangement 2 and blade 3, support bar 1 is the pole shape, and coupling arrangement 2 is enclosed within on the support bar 1, and coupling arrangement 2 can slide front and back on support bar 1, the number of blade 3 is two, and blade 3 is fixedlyed connected with coupling arrangement 2.

Be illustrated in figure 2 as second embodiment of the present utility model, the difference of itself and first embodiment is, 3 four in described blade is that the center is symmetrically distributed with the support bar.

Can change the teaching aid of center of gravity in the utility model,, change the center of gravity of whole object, just can make teaching aid stable thereby need to change fulcrum by moving forward and backward of coupling arrangement 2 and blade 3; Perhaps when fulcrum was constant, by changing center of gravity, the posture of whole teaching aid can change along with the variation of center of gravity.By using teaching aid of the present utility model to test, can show the knowledge of relevant center of gravity to the student.

Embodiment in the utility model only is used for the utility model is described, and does not constitute the restriction to the claim scope, and other substituting of being equal in fact that those skilled in that art can expect are all in the utility model protection domain.

Claims

1. can change the teaching aid of center of gravity, it is characterized in that, comprise support bar, coupling arrangement and blade, coupling arrangement slidably are connected on the support bar, and blade is fixedlyed connected with coupling arrangement.

2. the teaching aid that changes center of gravity according to claim 1 is characterized in that described blade is two, is that the center is symmetrically distributed with the support bar.

3. the teaching aid that changes center of gravity according to claim 1 is characterized in that described blade is four, is that the center is symmetrically distributed with the support bar.