JPS595535A - 4-air gap type polar electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Application) The present invention provides an armature having four polarized surfaces by interposing a permanent magnet in a magnetic circuit and superimposing and attenuating the magnetomotive force of a coil on the magnetic flux of the permanent magnet. This invention relates to a polarized electromagnetic eta device that operates in reverse.

(Problems with the Prior Art) A known example of this type of four-gap polarized electromagnetic relay is shown in FIG.

That is, upper and lower armature openings, C, are installed above and below the magnetization axis direction of the reversible permanent magnet A, and these upper and lower armature openings,
The inner side surface of C is used as a magnetic pole surface, and the left and right sides of a U-shaped yoke 2 whose upper and lower outer surfaces are polarized surfaces are interposed between them.

However, in this conventional example, the direction of the magnetization axis of the permanent magnet A is determined by the thickness of the left and right sides of the yoke and the air gap above and below it, that is, the stroke of the armature, resulting in a large magnetomotive force. Because it could not be removed, the holding force was low and the sensitivity was also poor.

(Purpose) The present invention has been made in view of the above points, that is, the left and right pieces of the yoke are located on the left and right outer sides of the armature piece, and the present invention is designed to permanently (magnetize the four stones) The purpose is to be able to take full advantage of the direction.

(Example) The present invention will be described below based on the drawings as an example. Reference numeral 1 denotes a permanent magnet, which is pivotally supported at the center by a shaft 2 and is reversible. 3゜4 are upper and lower armature pieces located above and below the magnetization axis direction of the permanent magnet 1, and are reversed with the permanent magnet 1; 5 is a U-shaped yoke; left and right vertical pieces 6;
．． 7 and the bridge P that connects this! r″8.

The inner surfaces of the left and right vertical pieces 6 and 7 are used as armature surfaces, and the left and right side end surfaces of the upper and lower armature pieces 3.4 are used as armature surfaces to face each other as a pair of upper and lower air gaps a, b, and c. , make d. 9 is a coil installed on the bridge piece 8, 10 is a card connected to the armature pieces 3 and 4, and the upper and lower contact plates 11.1
2 and separate it from the fixed contacts 13 and 14. X is the magnetic flux of the permanent magnet 1, and Y is the magnetic flux of the coil 9.

(Operation) Next, to explain the present invention in detail, in FIG. 1, the magnetic flux X of the permanent magnet 1 is as follows: C4 flows from lower armature piece 4 to S pole, and further from upper armature piece 3 to air gear lug b to right vertical piece 7 of yoke 5 to air gap d to lower armature piece 4 to S pole.

Furthermore, the magnetic flux Y of the coil 9 is transferred from the coil 9 to the bridging piece 8 of the yoke 5 to the left vertical piece 6 to the air gap 3 to the upper armature piece 3 to the air gap b to the right piece 7, and furthermore from the left vertical piece 6 to the air gap 3. Gap C → Lower armature 4 → Air gap d → Right vertical piece 7
flows to

Thus, air gaps b and c are diagonally positioned where the magnetic fluxes X and Y are in the same direction, and air gaps a and d are diagonally positioned where the magnetic fluxes X and Y are in the same direction.

Therefore, in the same direction, the magnets are attracted in a superimposed manner, and in the opposite direction, they are repelled, so that the armature piece 3.4 rotates clockwise along with the permanent magnet 1 about the shaft 2.

Next, if the current direction of the coil 9 is reversed, a near-gap blade is formed, d is the same, and the air gap b is the same as above.
The direction is reversed at c, so it is reversed counterclockwise.

Of course, even if the current to the coil 9 is cut off, the state after reversal is maintained by the magnetic flux of the permanent magnet 1.

(Effects) In the present invention, as described above, the left and right vertical pieces 6, 7 of the U-shaped yoke 5 are made to face the outer end surfaces of the upper and lower armature pieces 3.4, which are reversed with the permanent magnet 1, so that the magnetization of the permanent magnet 1 is reduced. The length in the axial direction is not affected by the vertical pieces 6.7 of the yoke 5, nor is it restricted by the upper and lower air gaps from the vertical pieces 6, 7 and the stroke of the armature. This has the effect of improving sensitivity.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the four-gap type polarized electromagnetic relay of the present invention, with Figure 1 being a front view, Figure 2 being a slope view,
FIG. 3 is a diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Permanent magnet, 2... Shaft, 3.4... Armature piece, 5... Yoke, 6, 7... Vertical piece, 8... Bridge piece, 9... Coil . Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others) Figure 1

Claims (1)

[Claims] A permanent magnet with the center as the axis point of the reversal axis, upper and lower armature pieces that are located above and below in the direction of the magnetization axis and that are inverted with the permanent magnet, and the left and right outer end surfaces of the upper and lower armature pieces as the armature surfaces. A U-shaped yoke is made up of left and right vertical pieces whose upper and lower contact surfaces face each other as a pair, and a bridging piece that connects these left and right vertical pieces, and a four-gap type pole made up of a coil equipped on this yoke. Electromagnetic relay.