CN214897189U

CN214897189U - Presentation device for junior middle school physics

Info

Publication number: CN214897189U
Application number: CN202121511811.XU
Authority: CN
Inventors: 单冰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-11-26
Anticipated expiration: 2031-07-05

Abstract

The utility model provides a presentation device is used to junior high school physics, this presentation device is used to junior high school physics includes the transparent case, the transparent incasement is fixed with horizontal baffle, the equipartition has the through-hole on the horizontal baffle, just be located in the transparent incasement the top of horizontal baffle is fixed with four vertical baffles side by side, and the floating block has been placed to the adaptation between two arbitrary adjacent vertical baffles, and wherein the size of two floating blocks is the same and with the variation in size of another floating block in the three floating block, and the density of one of them floating block is the same with the density of another floating block in two floating blocks that two floating block densities that the size is the same are different and the size is the same. The demonstration device can lead the student to realize the effect of buoyancy, and simultaneously lead the student to feel the difference of the buoyancy felt due to the different body cutting of the size and the density, compared with the prior art, the demonstration device can effectively increase the interestingness, the memory and the practical ability.

Description

Presentation device for junior middle school physics

Technical Field

The utility model relates to physics teaching aid technical field especially involves a presentation device for junior middle school physics.

Background

Buoyancy is the most common power in our life, also is a knowledge point that must master in the physics teaching of junior high school simultaneously, and the teaching personnel usually write on the blackboard during traditional buoyancy teaching to this imparts knowledge to students, but the mode that can't experiment like this shows out the key knowledge point of buoyancy teaching and supplies the student to watch the study.

Based on the foregoing, application number CN201720576370.9 discloses a junior middle school physics teaching buoyancy presentation device, belongs to middle school physics teaching apparatus technical field. The glass jar is characterized in that a water inlet valve is arranged on the upper side of the large glass jar, a water discharge valve is arranged on the lower side of the large glass jar, a small glass jar is arranged in the large glass jar, a triangular support is arranged below the small glass jar, a small hole is formed in the bottom of the small glass jar, a clamping groove is formed in the upper end of the small hole, and a floater is arranged in the clamping groove.

However, the above-mentioned chinese patent with application number CN201720576370.9 only allows students to simply observe the buoyancy, and cannot effectively make the students feel the buoyancy in person, which cannot effectively increase the interest, memory and operation ability.

To this end, we propose a presentation device for junior middle school physics to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing a demonstration device for junior middle school physics.

The utility model discloses a realize through following technical scheme:

the utility model provides a presentation device is used to junior high school physics, this presentation device is used to junior high school physics includes the transparent case, the transparent incasement is fixed with horizontal baffle, the equipartition has the through-hole on the horizontal baffle, just be located in the transparent incasement the top of horizontal baffle is fixed with four vertical baffles side by side, and the floating block has been placed to the adaptation between two arbitrary adjacent vertical baffles, and wherein the size of two floating blocks is the same and with the variation in size of another floating block in the three floating block, and the density of one of them floating block is the same with the density of another floating block in two floating blocks that two floating block densities that the size is the same are different and the size is the same.

Preferably, a cross bar crossing the four vertical partition plates is fixed at the top of the transparent box.

Preferably, a vertical rod is fixed at the upper end of each floating block, and each vertical rod penetrates through the cross rod.

Preferably, each vertical rod penetrates through the upper end of the cross rod and is fixedly provided with a pressing plate.

Preferably, each vertical rod is provided with scale marks.

Preferably, the upper side of the transparent box is provided with a water inlet valve, and the lower side of the transparent box is provided with a water outlet valve.

In the above embodiment, the demonstration device enables the student to feel the buoyancy when cutting the body, and meanwhile, the student feels the difference of the buoyancy when cutting the body due to the difference of the size and the density, so that the demonstration device is more effective in increasing the interestingness and the memory and the practical ability compared with the prior art.

Drawings

Fig. 1 is a schematic structural diagram of a junior middle school physics demonstration apparatus provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of three floating blocks in fig. 1 according to an embodiment of the present invention.

In the figure: 1-transparent box; 2-horizontal partition board; 3-a through hole; 4-a vertical partition; 5-floating block; 51-a first float; 52-a second float; 53-third float; 6-a cross bar; 7-vertical rod; 8-pressing plate; 9-a water inlet valve; 10-water outlet valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

For the convenience of understanding the demonstration apparatus for junior middle school physics provided by the embodiment of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a demonstration apparatus for junior middle school physics according to an embodiment of the present invention.

As shown in fig. 1, the junior middle school physics demonstration apparatus comprises a transparent box 1, wherein the transparent box 1 is rectangular and is a transparent plastic box. Transparent case 1 internal fixation has horizontal baffle 2, and the equipartition has through-hole 3 on the horizontal baffle 2 to the top that lies in horizontal baffle 2 in transparent case 1 is fixed with four vertical baffles 4 side by side, and the floating block 5 has been placed to the adaptation between two arbitrary adjacent vertical baffles 4. The materials of the horizontal partition plate 2 and the four vertical partition plates 4 are consistent with the material of the transparent box 1.

When three floating blocks 5 are specifically arranged, two of the three floating blocks 5 are the same in size and different from the other floating block in size, and the density of one of the two floating blocks which are the same in size and different in density is the same as that of the other floating block.

Further, a cross bar 6 crossing the four vertical partition plates 4 is fixed on the top of the transparent box 1. Vertical rods 7 are fixed at the upper ends of the floating blocks 5, and each vertical rod 7 penetrates through the cross rod 6. Each vertical rod 7 penetrates through the upper end of the cross rod 6 and is fixedly provided with a pressing plate 8, and each vertical rod 7 is provided with scale marks (not shown in the figure).

In addition, the upper side of the transparent box 1 is provided with a water inlet valve 9, and the water inlet valve 9 is arranged at the upper end of one side of the transparent box 1. The lower side of the transparent box 1 is provided with a water outlet valve 10, and the water outlet valve 10 is arranged at the lower end of the side opposite to the transparent box 1.

Referring to fig. 2, fig. 2 is a schematic structural diagram of three floating blocks in fig. 1 according to an embodiment of the present invention. For convenience of explanation of the three floating blocks, two floating blocks of the three floating blocks having the same size are sequentially named as a first floating block 51 and a second floating block 52, and the other floating block is named as a third floating block 53.

For better explanation, in the specific definition, the following are set: the first floating block 51 and the second floating block 52 have the same size but different density, the first floating block 51 and the third floating block 53 have the same size and different density, and the second floating block 52 and the third floating block 53 have the same size but different density.

The working principle is as follows: when the demonstration device is used in teaching, a teaching person can lift the two sides of the cross rod 6, so that the demonstration device can be moved conveniently; during demonstration, the water outlet valve 10 is closed, the water inlet valve 9 is connected with the water inlet pipe, the water inlet valve 9 is opened, water enters the transparent box 1 through the water inlet pipe and the water inlet valve 9, the water level in the transparent box 1 slowly rises through the through hole 3 in the horizontal partition plate 2, the water level among the four vertical partition plates 4 also slowly rises, the buoyancy of water borne by the first floating block 51, the second floating block 52 and the third floating block 53 rises together with the respective vertical rod 7, and in the process, students observe the situation of the floating distance through the scale lines on the surface of the vertical rod 7 and visually observe the situation of the floating distance difference among the first floating block 51, the second floating block 52 and the third floating block 53 due to different sizes and densities; in addition teaching personnel can let the student downwards press according to the pressure board 8 of two of them montant 7 upper ends simultaneously with the hand, so that the floating block that corresponds is to descending, make the student surely feel the effect of buoyancy, make the more obvious impression of student simultaneously because of the size, the different of the buoyancy effect that the different floating blocks of density received, compare with prior art, can not only effectually let the student feel the effect of buoyancy in person, simultaneously through having comparability (because of pressing down two of them floating blocks simultaneously) contrast, more effective increase is interesting, increase memory power and hands-on ability.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A presentation device for junior middle school physics, comprising: transparent case, its characterized in that, transparent incasement is fixed with horizontal baffle, the equipartition has the through-hole on the horizontal baffle, just be located in the transparent incasement the top of horizontal baffle is fixed with four vertical baffles side by side, and the floating block has been placed to the adaptation between arbitrary two adjacent vertical baffles, and wherein the size of two floating blocks is the same and with the size difference of another floating block in the three floating block, and the density of one of them floating block is the same with the density of another floating block in two floating blocks that two floating block densities that the size is the same are different and the size is the same.

2. The junior middle school physics demonstration device according to claim 1 wherein a cross bar spanning the four vertical partitions is affixed to the top of the transparent case.

3. The junior middle school physics demonstration device according to claim 2 wherein a vertical rod is fixed to the upper end of each floating block, each vertical rod penetrating through the cross bar.

4. The junior middle school physics demonstration device according to claim 3 wherein each vertical rod is fixed with a pressing plate through the upper end of the cross rod.

5. The junior middle school physics demonstration device according to claim 4 wherein each vertical rod is provided with a graduation mark.

6. The junior middle school physics demonstration device according to any one of claims 1 to 5, wherein the transparent box is provided with an inlet valve on the upper side and an outlet valve on the lower side.