JPS61220310A - Bilaterally shifting solenoid - Google Patents

Abstract

PURPOSE:To enable a bilateral action using one solenoid by providing a pair of magnets fixed to a movable rod separated at a prescribed interval so that the poles of the same kind may be opposed to each other on both sides of a tubular core. CONSTITUTION:A pair of magnets are fixed to a movable rod 13 at a prescribed interval so that the poles of the same kind may be opposed to each other on both sides of a tubular core 10. These magnets 14, 15, both annular permanent magnets, are fixed to a movable rod 13 in the manner that their N-poles are opposed to each other. In flowing an electric current through the coil 11, the right-hand end of the tubular core 10 forms a S-pole and the left-hand end a N-pole; thereby the right-hand end attracts the magnet 15, and, at the same time, the left-hand end repulses the magnet 14 so that the movable 13 is shifted left. If a reverse current is flowed, the left-hand end of the core 10 forms a S-pole, and the right-hand end forms an N-pole, shifting the rod 13 right.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a solenoid. More specifically, it relates to a bidirectional solenoid in which a movable rod can move in both directions.

(Prior Art) As a conventional solenoid, there is generally one shown in FIG.

This conventional solenoid has a fixed core (1) and a coil (2
), a movable iron core (3) is inserted through it, and when the coil (2) is energized, the movable iron core (3) is attracted.

(Problems with the prior art) The conventional solenoids as described above operate only in one direction, so if the purpose of use requires bidirectional operation, two solenoids of this type are required. Although they were used in combination, there was a problem in that the structure and mechanism became complicated when the two were combined.

(Objective of the present invention) An object of the present invention is to solve the problems of conventional solenoids as described above, and to enable bidirectional operation with one solenoid.

(Structure of the present invention) In order to achieve this object, the bidirectional solenoid of the present invention includes a cylindrical core that is covered with a coil, and a non-wire that is longer than the cylindrical core and is slidably inserted into the cylindrical core. The present invention includes a movable rod made of a magnetic material, and a pair of magnets fixed to the movable rod at a predetermined interval on both sides of the cylindrical core so that the same poles face each other.

(Actions and Effects of the Present Invention) Since the bidirectional solenoid of the present invention has the above-described configuration, it exhibits the following effects.

(i) When a current is passed through the coil, S and N poles are generated at the ends of the cylindrical core, and the magnet fixed to the movable rod has the same poles (for example, N and N poles) facing each other, so the cylindrical shape At one end of the core, they have different poles (for example, the S pole of the core and the N pole of the magnet) and attract each other, while at the other end they have the same poles (for example, the N pole of the core and the N pole of the magnet) and repel each other. , the movable rod moves to one side.

Actually, when current is passed through the coil in the opposite direction (the same applies even if the winding direction of the coil is reversed), the opposite pole is generated at the end of the cylindrical core, so the movable rod moves in the opposite direction.

That is, according to the bidirectional tournoid of the present invention, exactly the same operation in both directions can be obtained.

(ii) Since the movable rod is made of a non-magnetic material, the movable rod is not affected by the magnetic force of the cylindrical core, and therefore extremely smooth operation can be achieved.

(iii) Since the magnet is fixed to the movable rod, the magnet is attracted to the cylindrical core and the movable rod is self-retained even if the coil is no longer energized after the movable rod has moved.

(iv) Conventionally, when bidirectional operation is required,
It was necessary to combine two solenoids, but according to the present invention, one solenoid is sufficient, and therefore the structure and mechanism can be simplified, and costs can be reduced economically. .

(Embodiment) FIG. 1 is a sectional view showing an embodiment of the bidirectional solenoid of the present invention.

(10) is a cylindrical core, and is covered with a coil (11). (12) is the bobbin.

(13) is a movable rod made of a non-magnetic material and inserted into the cylindrical core (10). The movable rod (13) is made of copper, for example.

(14) A pair of magnets (15) are fixed to the movable rod (13) at a predetermined interval on both sides of the cylindrical core (10) so that the same poles face each other. In this embodiment, ring-shaped permanent magnets are used as the magnets (14) and (15), with the N poles facing each other and the movable rod (1
3) is fixed.

Note that (16) indicates a case.

Next, the operation will be explained with reference to FIG. 2.3.

First, as shown in Fig. 2, when current is applied to the coil (11), the right end of the cylindrical core (1o) becomes the S pole and the left end becomes the N pole, and the right end attracts the magnet (15) and at the same time At the left end, the magnet (14) is repelled, so the movable rod (13), which was initially on the right (see Figure 3), attracts the magnet (15) to the cylindrical core (1o) as shown by the arrow (a). Move to the left until

After this, even if the electricity is turned off, the magnet (15) remains in the cylindrical core (l).
Since the movable rod is attracted to the right end of O), the movable rod is held at the position shown in the second figure. Therefore, even if the current flowing through the coil (11) is a pulse signal, self-maintenance is achieved.

Next, the coil (
11) When a current is applied in the opposite direction to that in Figure 2,
The left end of the cylindrical core (10) is the S pole, the right end is the N pole,
At the left end, the magnet (15) is repelled, so the movable rod (
13) moves to the right as shown by arrow (b) until the magnet (14) is attracted to the cylindrical core (10).

Although one embodiment of the bidirectional solenoid of the present invention has been described above, the present invention is not limited to this, and any appropriate embodiment may be adopted within the scope of the technical idea of the present invention. For example, ■ The shape of the cylindrical core should be cylindrical or rectangular.

■ The cylindrical core has an end (
10' ) (10°) (Figure 1).

■ For the coil (11), wind two pieces in opposite directions.
The magnetic poles are changed depending on which of them is energized.

■ Magnets (14) and (15) should be electromagnets.

In addition, as a special application example of the bidirectional solenoid of the present invention, it is possible to use it as a means for swinging the segment (21) of an electromagnetic indicator (20) as shown in FIG.
In this case, there is the advantage that the self-retention of the segment (21) is ensured. In the figure (22) shows the mask of the display.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the bidirectional solenoid of the present invention. FIGS. 2 and 3 are explanatory diagrams of the same action. FIG. FIG. 2 is a partial schematic diagram of a solenoid used in an electromagnetic display as an application example. (10)...Cylindrical core (11)...Coil (13)...Movable rod (14) (15) ・Magnet Figure 1 Figure 1 Day 4 Figure 2 Figure 3

Claims (1)

[Claims] A cylindrical core with a coil exterior, and a cylindrical core that is longer than the cylindrical core.
A movable rod made of a non-magnetic material that is slidably inserted into the cylindrical core, and a pair fixed to the movable rod at a predetermined interval on both sides of the cylindrical core so that the same poles face each other. A two-way solenoid with a magnet.