JPS6039888Y2 - Series/parallel teaching tools - Google Patents

Description

[Detailed description of the invention] This invention relates to a teaching tool for helping lower grade children understand the difference between series and parallel connections of batteries.

Traditionally, lamps have been used to understand voltage differences in series-parallel connections, which are represented by differences in lamp brightness.

However, the brightness of the lamp is difficult to see in a bright place during the day, and the lamp brightness fluctuates due to loose lamp sockets or poor connections in the circuit.

This proposal utilizes the magnetic action (repulsion) between a permanent magnet bar and an electromagnetic coil, and its strength is expressed by the flying distance of the magnet bar.

An example of the figure in which the present invention can also be used as a toy will be described.

Reference numeral 1 denotes a base, around which a hole 3 into which a rod 2 is inserted is bored.

A through hole 4 is provided in the center of the base, a cannon barrel body 6 with a built-in electromagnetic coil 5 is tilted and rotatably pivoted 7 on the upper surface, and a battery box 8 and a switch plate 9 are mounted on the lower surface. It is integrally pivoted.

10a and 10b are batteries, C is a common contact part, and D.

E is a contact portion that comes into contact with the electrode of each battery.

11゜12. At 13 and 14, contact A is attached to each of the above contact parts,
This is a pin for fixing to B.

As shown in FIG. 3, the above electric circuit is connected so that the direction of current flowing through the electromagnetic coil 5 is always constant.

20 is a magnetic bar, and the direction of the magnetic pole is defined.

When the rod body 2 is inserted into the hole 3 with the magnet rod 20 inserted into the cylinder 6', at the location where the switch plate 9 is located,
Switch plates 9a and 9b come into contact and current flows through electromagnetic coil 5, forming an electromagnet.

Since the direction of the magnetomotive force of the coil is constant and the coil is wound so as to generate a repulsive force with the magnet bar 20, the magnet bar is ejected from the cylinder 6'.

Since the position at which the magnetic bar falls naturally varies depending on the connection relationship of the batteries, the connection relationship of the batteries can be known from this difference in position.

The change in series and parallel batteries and the setting positions of contacts A and B are as shown in Figure 3 A9, with contact B at the parallel connection port.
is the contact part, and it is in common contact with E, so battery 10
It is also possible to remove either a or 10b.

[Brief explanation of the drawing]

FIG. 1 is a side view of the embodiment of the present invention, FIG. 2 is a bottom view thereof, and FIG. 3 is a circuit diagram showing connection relationships in series and parallel connections. 5... Electromagnetic coil, 6... Cannon barrel body, 9
...Switch board, 20...Magnetic bar.

Claims (1)

[Scope of utility model registration request] A cylindrical body into which a magnetic bar is inserted, an electromagnetic coil that generates a magnetic force on the outer periphery of the cylindrical body in a direction that generates a repulsive force outward against the magnetic bar, and a movable switch connected to one terminal of the coil. A contact A connected to the fixed switch board facing the plate, a contact B connected to the other end of the coil, and a common contact provided exposed inside the battery box housing the two batteries. It has a contact portion C and separate contact portions E, and when the batteries are connected in series, the contacts A and B are connected to the contact portions E, respectively, and when the batteries are connected in parallel, the contact A is connected to the contact portion E, respectively. Connecting to the fixed common connection part and connecting the contactor B to the contact part,
A series-parallel teaching tool, characterized in that the inserted magnet rod is repulsively ejected from the cylinder body when the switch plate contacts the switch plate, and the ejecting distance is made different in each case.