JPH059738Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a lever experiment tool for teaching materials.

[Conventional technology]

Conventionally, there has been no lever experiment device with a simple structure like the one proposed in the present invention.

[The problem that the idea aims to solve]

This invention was devised in view of the above circumstances, and its purpose is to create a very simple structure that allows lower grade students to experiment and effectively learn the lever principle learned in the target grade. Our goal is to provide lever experiment equipment with high educational effectiveness.

[Means to solve the problem]

In order to achieve the above object, the lever experiment tool of this invention has a bracket 1 protruding from the center of the upper surface, and the upper surface of the base located on one side of the bracket 1 is provided with different rubber hooking distances a from the bracket 1. ,b,c
It has a base 5 having a plurality of pairs of rubber hooking protrusions 2, 3, and 4 projecting thereon, and a horizontally elongated hole 6 that slides into engagement with the protruding pin 1a of the base bracket 1, and has a rubber hooking portion 7 at one end. A lever lever 9 with a finger press part 8 at the other end, and a rubber band that is hung from the rubber hook part 7 at one end of the lever lever 9 and selectively stretched by being hooked to a base rubber hooking protrusion at an arbitrary position. 10, and by changing the rubber hooking position of this rubber band 10 to the base rubber hooking protrusions 2, 3, and 4, the distance m1 from the pin pivot point of the lever lever 9 to the one end rubber hooking portion 10 and the pin pivot point. The configuration is such that an experiment can be conducted to see how the acting force of the lever 9 changes by changing the distance m2 from the finger pusher 8 to the other end finger pusher 8.

[Effect]

According to the lever experiment tool having the above structure, the rubber band 10 is attached to the rubber hanging protrusion 2 closest to the base bracket 1.
When the rubber band 10 is hooked on the base rubber hooking protrusion 3 in the middle part, m1 becomes less than m2.
m2, and the rubber band 10 is attached to the base bracket 1.
m1 when hooked on the rubber hook protrusion 4 farthest from
> m2, it is possible to easily experiment to see how the acting force (finger pushing force) on the lever 9 changes as a result of changes in the distances m1 and m2.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. In the figure, reference numeral 5 denotes a base made of synthetic resin that can be placed on a desk. A bracket 1 is protruded from the center of the upper surface of the base 5. Three pairs of rubber hooking protrusions 2, 3, and 4 are protruded from the bracket 1 at different rubber hooking distances a, b, and c from the upper surface of the base located on one side of the bracket 1.

Reference numeral 9 denotes a lever lever supported by the base bracket 1 so as to be movable vertically and slidably in the length direction;
The lever 9 has a horizontally elongated hole 6 that slides into engagement with the bracket projecting pin 1a, and has a groove-shaped rubber hook 7 at one end and a button-shaped finger pusher 8 at the other end. 10 is hung on the rubber hooking part 7 at one end of this lever 9, and selectively stretched by being hooked on the base rubber hooking protrusion at an arbitrary position (the drawing shows the rubber hooking protrusion 3 at the middle part). It is a rubber band, and this rubber band 1
The distance m1 from the pin pivot point of the lever 9 to the rubber hooking part 7 at one end and the distance m1 from the pin pivot point to the finger pusher part 8 at the other end are determined by changing the rubber hooking positions for the base rubber hooking protrusions 2 to 4 of the lever lever 9. Due to the change in distance m2,
The structure is designed to allow experiments to see how the acting force of lever 9 changes.

[Effect of idea]

Since the lever experiment device of this invention has the above-mentioned configuration, the distance m1 from the pin pivot point of the lever lever 9 to the rubber hooking part 7 at one end, and the distance m1 from the pin pivot point to the finger pusher part 8 at the other end. When the rubber band 10 is hooked on the rubber hooking protrusion 2 closest to the base bracket 1, the distance m2 becomes m1<m2, and when the rubber band 10 is hooked on the base rubber hooking protrusion 3 in the middle part, m1=m2. Then, when the rubber band 10 is hooked on the rubber hanging protrusion 4 furthest from the base bracket 1, m1>m2, so depending on the change in these distances m1 and m2, the acting force (finger pushing force) on the lever lever 9 is determined. It is possible to easily experiment to see how things change, and it is possible to provide a lever experiment tool that has a very simple structure and is highly educationally effective.

[Brief explanation of the drawing]

Figure 1 is a front view showing the lever experiment device of the present invention, Figure 2 is a plan view of Figure 1, and Figures 3 and 4 are the
It is a sectional view along the - line and the - line of a figure. 1...Base bracket, 1a...Protrusion pin, 2
~4...Rubber hanging protrusion, 5...Base, 6...Horizontal hole, 7...Rubber hooking part, 8...Finger press part, 9
...Lever rod, 10...Rubber band.

Claims (1)

[Scope of utility model registration request] A base having a bracket protruding from the center of the upper surface and a plurality of pairs of rubber hooking protrusions protruding from the upper surface of the base located on one side of the bracket at different distances from the bracket, and this base. A lever lever has a horizontally elongated hole that slides and engages with the protruding pin of the bracket, and has a rubber hook on one end and a finger pusher on the other end, and a base that is hung on the rubber hook at one end of the lever and can be placed at any position. A rubber band is provided that is selectively stretched by being hooked on the base rubber hooking protrusion, and the rubber hooking position of the rubber band with respect to the base rubber hooking protrusion is changed to extend from the pin pivot point of the lever lever to the rubber hooking portion at one end. A lever experiment tool that allows experiments to be performed to see how the acting force of a lever changes depending on the distance between the pin pivot point and the finger push part at the other end.