JPS643329B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polar electromagnet device used in an electromagnetic relay.

Conventionally, as this type of polar electromagnetic device, those shown in FIGS. 6 and 7 are known. (Refer to Japanese Patent Publication No. 59-43081.) In other words, in FIG. 6A, when the coil 2 is not energized, the magnetic fluxes φ7 and φ8 of the permanent magnets 7 and 8 flow in the direction of the arrow, so that both ends 1 of the core 1
Adsorption parts 5a and 4b of amateurs 4 and 5 are attached to b and 1c.
is adsorbed. From this state, when the coil 2 is excited so that one end 1b of the core 1 becomes the S pole and the other end 1c becomes the N pole, the coil 2 is energized between the one end 1b and the attraction part 5a, and between the other end 1c and the attraction part 4b enters a repulsive state, and the armatures 4 and 5 rotate counterclockwise around the rotation axis O, resulting in the operating state shown in FIG. 6B.

That is, one end 1b is attracted to the suction part 4a, and the other end 1c is attracted to the suction part 5b. At this time, the magnetic fluxes φ7 and φ8 of the permanent magnets 7 and 8 flow as shown in FIG. 6B, so even if the current to the coil 2 is stopped, the operating state shown in FIG. 6B can be maintained.

Next, if you energize the coil 3 which is wound in the opposite direction to the coil 2, the operation will be opposite to the above, and the amateur 4,
5 rotates clockwise to the return state shown in FIG. 6A, and this return state can be maintained even if the energization to the coil 3 is stopped.

According to the above configuration, the coils 2, When the current to 3 is cut off, its adsorption force becomes the same,
A bistable, ie, latching type, polar electromagnet can be constructed.

In order to make a polarized electromagnet with such a configuration monostable, that is, a single stable type, a non-conductor as shown in FIG. The magnetic plate 100 may be interposed. In other words, one end portion 1b is the suction portion 4.
a, the other end 1c is attached to the non-magnetic plate 100 to the adsorption part 5b.
In the operating state, each adsorbed through
If the current to the coil 2 is stopped, the permanent magnets 7 and 8
Since the magnetic fluxes φ7 and φ8 from flowing into the core 1 through the non-magnetic plate 100 can be interrupted, the operating state shown in FIG. 6C cannot be maintained.

Therefore, the armatures 4, 5 are rotated clockwise to return to the state as explained in FIG. 6A.

However, according to the above configuration, the nonmagnetic plate 10
0 must be fixed to the operating side suction portions 4a, 5b by welding or the like, resulting in disadvantages such as an increase in the number of parts and a complicated manufacturing process.

Therefore, as shown in Fig. 7, amateur 4,
The return side suction parts 4a, 5a of 5 are connected to the operation side suction part 5.
A single stable type is known by making the width wider than b and 4b (L1>L2) and making the area of the former larger than the area of the latter.

That is, the suction force when the return side suction parts 4a, 5a of the armatures 4, 5 shown in FIG.
b, 4b are made stronger than the attraction force when they are attracted to the core 1, and are configured to return to the return side when the excitation of the coil 2 is released.

However, since the configuration shown in FIG. 7 is a single stable type, it is required to use a latching type.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a polarized electromagnet that can be made into a latching type with a single stable type structure without increasing the number of parts.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows an assembled perspective view of a polarized electromagnet device according to the present invention, and FIG. 2 shows an exploded perspective view. In these figures, reference numeral 1 denotes a substantially H-shaped core, and coils 2 and 3 wound in opposite directions are wound around a central portion 1a of the core 1. Reference numerals 4 and 5 denote a pair of roughly square-shaped armatures made of plate-shaped magnetic material, and the area of one suction portion 4a, 5a corresponding to both ends 1b, 1c of the core 1 is equal to the area of the other suction portion 4b, 5a. It is set larger than the area of 5b. Amateurs 4 and 5 have suction parts 4a with the same large area.
and 5a, 4b and 5b are arranged above and below the core 1 so as to face each other. A non-magnetic plate 6 is fixed to each of the attraction parts of the armatures 4 and 5 by welding or the like in order to optimize the operation and return voltages. Amateurs 4 and 5 are both ends 1b and 1 of the core 1.
On the outside of c, an axis O is connected by two permanent magnets 7 and 8 and is perpendicular to the axes of the coils 2 and 3.
-O is rotatably supported. The permanent magnets 7 and 8 are magnetized in the same direction, for example, as shown in the figure, with the north pole at the top.

FIGS. 3 and 4 show specific examples of the electromagnetic device described above. According to this, the coils 2 and 3 are provided in the center portion 1a of the core 1 via the spool 9. In the center of the spool 9, there is a partition wall 10 that insulates and isolates both the coils 2 and 3, and on both sides of the partition wall 10 there are rotating shafts 11 and 11 perpendicular to the axes of the coils 2 and 3.
are formed respectively. Amachiyua 5 at the bottom
are provided in the electrically insulating frame 12 by insert molding, and the frame 12 is formed with storage recesses 13 and 14 for the permanent magnets 7 and 8 and a storage recess 15 for the upper armature 4. U-shaped bearing grooves 17, 17 into which the rotation support shafts 11, 11 fit are formed in the opposing inner wall portions 16, 16. Lower center part 4c, 4c of upper armature 4
is in rotatable contact with an arcuate surface (only one is shown) 18 formed at the base of each rotating support shaft 11, 11 so as not to rattle in the vertical direction. Reference numeral 19 denotes a pressing spring for the upper armature 4, and locking pieces 19a and 19b formed at both ends of the spring 19
It is latched to protrusions 20a and 20b formed in. That is, the upper and lower armatures 4, 5 are housed in the frame 12 together with the permanent magnets 7, 8, and these 4,
5, 7, 8, and 12 form a movable block 28 that rotates around the rotation support shaft 11.
21 and 22 are lead-out terminals for the coils 2 and 3, and these terminals 21 and 22 are connected to the flanges 2 at both ends of the spool 9.
It is planted on 3 and 24. Reference numerals 25 ₁ to 25 ₄ are fastening pieces arranged at the shoulders of both ends 1b and 1c of the core 1 and integrally formed with the flange parts 23 and 24 at both ends of the spool. Reference numeral 26 denotes a projecting piece that passes through the bottom through hole 27 of the frame body 12 from the lower part of the partition wall 10, and this projecting piece 27 and the fastening pieces 25 ₁ to 25 ₄ connect the core 1.
is fixed to a base (not shown).

Next, the operation will be explained with reference to FIGS. 5A and 5B. In FIG. 5A, the coils 2 and 3 are in a non-excited state, and the magnetic fluxes φ ₇ and φ 8 of the permanent magnets 7 and ₈ flow in the direction of the arrow, so that both ends 1b and 1 of the core 1 are
The suction parts 5a and 4b of the armatures 5 and 4 are suctioned to c. When the coil 2 is excited so that one end 1b of the core 1 becomes the S pole and the other end 1c becomes the N pole, the distance between the end 1b and the attraction part 5a and between the end 1c and the attraction part 4b is A state of repulsion occurs, and in response to this, the end portion 1b and the suction portion 4a, and the end portion 1c and the suction portion 5
The area between b is in a suction state. As a result, the armatures 4 and 5 rotate counterclockwise around the rotational support shaft 11, and are brought into the state shown in FIG. 5B. That is, the end portion 1b is suctioned to the suction portion 4a, and the end portion 1c is suctioned to the suction portion 5b. At this time, the magnetic fluxes φ ₇ and φ 8 of the permanent magnets 7 and ₈ flow as shown in FIG. 5B, so
Even if the current supply to the coil 2 is stopped, the state shown in FIG. 5B is maintained.

Next, if we energize coil 3, which is wound in the opposite direction to coil 2, the attraction and repulsion relationship will be reversed.
Rotate the armatures 4 and 5 clockwise as shown in Figure 5A.
Return to state.

The adsorption parts 4a and 5a on one side and the adsorption parts 4b and 5b on the other side face each other with the same area, so the attraction force by the permanent magnets 7 and 8 is in the state shown in FIG. They have the same magnitude in each state, and the changes in the attractive force caused by the excitation of the coils 2 and 3 are also equal.

In other words, the suction parts 4a, 5a on one side of the armatures 4, 5 facing each other are made wider (L1>L2) than the suction parts 4b, 5b on the other side, and the area of the former is made larger than the area of the latter. By doing so, it can be made into a latching type.

In addition, the narrow (L2) suction portion 5 of the amateur 5 is attached to the wide (L1) suction portion 4a of the amateur 4.
b to the narrow (L2) suction part 4b of the amateur 4 and the wide (L1) suction part 5a of the amateur 5.
If they are arranged to face each other, it is possible to provide the single stable type polar electromagnet described with reference to FIG. This allows a single stable type structure to be made into a latching type without increasing the number of parts.

In the above embodiment, operation and return were performed using a pair of coils 2 and 3 wound in opposite directions, but it is possible to change the current direction using one coil 2. It goes without saying that the operation and return may be performed by the following.

As described above, the present invention can provide a latching type polar electromagnet with a single stable type configuration without increasing the number of parts.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a polarized electromagnet device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same electromagnet device, and FIGS. 3 and 4 are sectional views showing specific examples of the same electromagnet device. and exploded perspective view, Figure 5 A, B
6A to 6C are operation explanatory diagrams of the conventional latching type and single stable type polar electromagnet devices, and FIGS. 7A and 7B are diagrams showing other examples of the conventional latching type. FIG. 3 is an explanatory diagram of the operation of a polar electromagnet. 1...Core, 1a...Central part, 1b, 1c...
Both ends of the core, 2, 3...Coil, 4, 5...Amateur, 4a, 5a...Adsorption part on one side, 4
b, 5b...Adsorption part on the other side, 7, 8...Permanent magnet, 28...Movable block, O...Rotating shaft.

Claims (1)

[Claims] 1. A roughly H-shaped core with a coil wound around the center, and a wide suction part on one side that is adsorbed and desorbed to both ends of the core, which is larger than the area of the suction part on the other side. A pair of substantially square-shaped armatures in which adsorption portions having the same large area are arranged opposite to each other with the core interposed therebetween, and a pair of armatures that are integrally held between both ends of the pair of armatures on the outside of both ends of the core. and a pair of permanent magnets having the same magnetic poles on the sides in contact with each of the armatures, and a movable block including the armatures and the permanent magnets is rotatable about an axis perpendicular to the axis of the coil. A polar electromagnetic device supported by.