JPS6017856Y2 - electromagnet - Google Patents

Description

[Detailed explanation of the invention] This invention relates to an electromagnet, and more specifically, it is an electromagnet that has two coils and four reed switches, and whose movable iron core moves back and forth.The purpose of this invention is to simply switch the switch. It is an object of the present invention to provide an electromagnet in which a movable iron core moves repeatedly between an advanced position and a retracted position simply by repeatedly turning on and off.

The drawings showing the embodiments of the present application will be described below.

1 is a frame made of a magnetic material. A frame 2 is connected to the frame 1 and is made of a magnetic material.

Reference numeral 3 denotes a fixed iron core coupled to the frame 1, which is made of a magnetic material and has an attraction surface 3'.

Reference numeral 4 denotes a fixed iron core coupled to the frame 2, which is made of a magnetic material and has an attraction surface 4'.

A yoke 5 is made of a magnetic material and is coupled to the frame 1 to form a magnetic circuit.

6 and 7 are bobbins, and Ca and cb are excitation coils wound around the bobbins 6 and 7, respectively.

Ra and Rb are reed switches that turn ON and OFF depending on the presence or absence of a magnetic field by energizing and stopping the coils Ca and Cb, respectively. (normally closed contacts).

La and Lb are reed switches that turn on depending on the presence or absence of a magnetic field.
It is designed to operate in the OFF state.

8 is fixed to the frame 2, and furthermore, the reed switch 1
．． 1. This is a fixing base for fixing Lb.

Reference numeral 9 denotes a movable iron core that is attracted and released by energizing and stopping coil Ca or coil cb.

Reference numeral 10 is for transmitting the operating force of the pin movable core 9 coupled to the movable core 9 to a mechanical device not shown.

11 is located near the reed switches La and Lb, and by applying the influence of a magnetic field, the contact point of the reed switch is
A permanent magnet is coupled to pin 10 for N and OFF operation.

Further, 12 in FIGS. 4, 5, 6, and 7 is the circuit configuration of this electromagnet.

Next, the operation of the electromagnet having the above configuration will be explained.

The explanation will be made with reference to FIGS. 4, 5, 6, and 7, which illustrate control circuits in the electromagnets.

First, FIGS. 4 and 6 show a non-excited state with the external switch SW turned off. In FIG. 4, the movable core 9 is in the position shown in FIG. 1, and in FIG. 3 shows the state of the circuit after it has moved to the position shown in FIG. 3.

5 and 7 show the state after a while has elapsed after the external switch SW is turned on and energized, and FIG. 5 shows the state after the movable core 9 has moved from the position shown in FIG. 1 in the direction of the arrow 14. , that is, it shows the circuit state when it is in the position shown in FIG.

The operation will be described below. When the external switch SW shown in FIG. 4 is turned on, the coil cb is energized in the direction of arrow 13 through the reed switch Ra, and the movable iron core 9 is attracted in the direction of arrow 14.

At the same time, the pin 10 and the permanent magnet 11 fixed to the pin 10 also move, resulting in the state shown in Figure 3 for the reed switch L.
The contact point a is closed, while the contact point of reed switch Lb is opened, resulting in the circuit state shown in FIG. 5, in which energization is switched and maintained in the direction of arrow 15.

After the mechanical device (not shown) is actuated by the movement of the pin 10 in this manner, the external switch SW shown in FIG. 5 is turned off, resulting in the circuit state shown in FIG. 6, and the energization is stopped.

Next, in FIG. 6, by turning on the external switch SW, electricity is applied in the direction of arrow 16 through the reed switch h, and the coil Ca is excited.

The movable iron core 9 is then attracted from the position shown in FIG. 3 in the direction of the arrow 17 in FIG. 1, and the pin 10 and the permanent magnet 11 fixed to the pin 10 also move, returning to the state shown in FIG.

At the same time, the contacts of the reed switch h are opened, while the contacts of the reed switch Lb are closed, changing to the circuit state shown in FIG. 7, and current flow is maintained in the direction of the arrow 18.

In this way, after operating a mechanical device (not shown) by moving the pin 10 as described above, the circuit returns to the circuit state shown in FIG. 4 by turning off the external switch SW, and one work is completed.

As mentioned above, this invention has two coils,
There is a movable iron core that moves back and forth between them, and when the switch is pressed and released, the movable iron core is moved to the opposite side, and when the switch is pressed and released, it is returned to its original position.

By repeating this operation, the - switch functions as if it were a changeover switch, which is convenient for performing shift operations that alternately change left and right.

Furthermore, once the switch is pressed and changed, it remains in that position even when the switch is released, making it an extremely useful electromagnet that helps save power.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal cross-sectional view;
Fig. 2 is a sectional view taken along the line X-X in Fig. 1, Fig. 3 is a partial sectional view showing a different operating state from Fig. 1, Figs. 4 and 5,
6 and 7 show the circuit states, and FIGS. 4 and 5 are circuit explanatory diagrams for explaining the change from the state in FIG. 1 to the state in FIG. 3, and FIGS. FIG. 7 is a circuit explanatory diagram for explaining the change from the state shown in FIG. 3 to the state shown in FIG. 1. 1...Frame, Ca...◆Coil, L
ao...Reed switch, 11...Permanent magnet.

Claims (1)

[Scope of utility model registration request] The first coil and the second coil arranged in parallel with each other include
A first reed switch and a second reed switch are respectively attached, and the reed switches have a common terminal, a contact that is normally open in the absence of a magnetic field, and a contact that is normally closed in the absence of a magnetic field. The normally open contact of the first reed switch is connected to one end of the first coil, the normally closed contact is connected to one end of the second coil, and the normally open contact of the second reed switch is connected to one end of the second coil. The contact is connected to the other end of the second coil, the normally closed contact is connected to the other end of the first coil, and the common terminal of both reed switches is connected to the power source through an external switch, and A permanent magnet is integrated into the movable iron core, which is arranged between the first coil and the second coil so that it can freely move forward toward the first coil and move backward toward the second coil. A third reed switch and a fourth reed switch are movably connected and are disposed along the advanced position and the retracted position of the permanent magnet, respectively, and are turned on and off in response to the presence or absence of a magnetic field, respectively. The reed switch is connected in parallel between the common terminal of the second reed switch and the normally open contact, while the fourth reed switch is connected in parallel between the common terminal of the first reed switch and the normally open contact. An electromagnet characterized by: