JPS6337926B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnetic relay.

Conventionally, this type of electromagnetic relay has a yoke 1 interposed with a permanent magnet 14' as shown in FIG.
An armature 26' is swingably disposed between 3' and 13a', and the armature 26' receives a suitable spring force so that its base end 26a' is attached to one yoke 1.
The free end 26b' is brought into contact with the other end of the other yoke 13a', and the coil 2
When the magnet 3' is not energized, it is configured to receive the magnetic force of the permanent magnet 14' to maintain its position and realize monostable operation. In this configuration, by exciting the coil 23', the free end 26b' is attracted to the other end of one yoke 13' using the base end 26a' of the armature 26' as a fulcrum, but monostable operation is realized. When doing so, place a fulcrum X at the base end of armature 26'.
Because of this, armature 26' is connected to the other yoke 1.
When the armature 26' is attracted in the direction of the arrow X toward the other end of the armature 26', an attractive force in the direction of the arrow X', which is opposite to the direction of the arrow X, acts near the base end of the armature 26', and magnetism from the permanent magnet 14' is applied. It had the disadvantage of being inefficient, requiring a large permanent magnet, and increasing the overall external size. Furthermore, since there is a relatively large gap between the base end 26a' of the armature 26' and one end of the yoke 13', magnetic resistance is high and sensitivity is poor.

It is an object of the present invention to provide an electromagnetic relay that eliminates the above-mentioned drawbacks, can be miniaturized, and has high sensitivity.

Figures 1 to 5 show an embodiment of the present invention, and in the drawings, reference numeral 1 denotes a terminal body having a recess 2 in the center, which are fixed in pairs to one end of each side surface. Contact terminals 3 and 4 are implanted, and the upper portions of each of the fixed contact terminals 3 and 4 protrude near one end of each side surface so as to be spaced apart and facing each other in the width direction of the terminal body 1, Fixed contacts 5 and 6 facing each other are fixedly provided. Further, two coil terminals 7 and 8 are implanted on the other end side of each side surface of the terminal body 1 with their upper portions projecting upward, and the fixed contact terminals 3 and 4 and the coil terminal 7 , 8, common terminals 9, 9 are implanted with their upper portions projecting upward. Furthermore, base ends of horizontally extending movable contact springs 10, 10 are fixed to the upper portions of the respective common terminals 9, 9, and movable contacts 1 are fixed to the tips of the movable contact springs 10, 10.
1 and 11 are provided.

12 is a magnet block that can be seated in the recess 2 of the terminal body 1, and a pair of concave-shaped yokes 13,
13a and a permanent magnet 14 are molded at the same time, and the yokes 13, 13a are parallel to each other so that the gap between them is constant, and at least the upper ends of both ends extending upward and the respective surfaces of the body are exposed and facing each other. ing. Further, a recess 15 is defined in the magnet block 12, and partition wall portions 16, 16 are erected in parallel to and adjacent to the recess 15 on the outside thereof. Further, grooves 18, 18 into which a card 17 can be inserted are defined at one end of the partition walls 16, 16, and grooves 18, 18 into which a card 17 can be inserted are defined at the other end. The enlarged portion 20 is formed with recesses 21, 21 which accommodate the other end of the magnet block 12 and allow the magnet block 12 to be straddled thereon. A pair of receiving grooves 22, 22 are formed in the card 17, and the movable contact springs 10, 10
are provided so as to receive the side relatively closer to the common terminals 9, 9.

On the other hand, the coil frame 19 is provided with a winding part 24 in which a coil 23 can be wound, and the enlarged part 2
0 is implanted with extraction terminals 25, 25 to which the extraction ends of the coil 23 can be connected, and can be connected to suitable coil terminals 7, 8 implanted in the terminal body 1. A T-shaped armature 26 has a base end 26a seated on one end of the magnet block 12, and has a surface substantially parallel to the surface of one end of one yoke 13 at the base end 26a. A bulging portion 27 is provided, one free end 26b of which passes through the coil frame 19 in a swingable manner, and the card 17 is held near the end. The armature 26 is provided so that its base end 26a abuts one end of one yoke 13 and the free end 26b abuts the other end of the other yoke 13b under a suitable spring force. 28 is a cover attached to the terminal body.

Further, the operation of the present invention will be explained. Now coil frame 1
When the coil 23 wound around the armature 26 is energized, the armature 26 moves from the other end of the yoke 13a to the yoke 13 with its base end 26a as a fulcrum.
Since the card 17 is attracted toward the other end and moves in the same direction, the movable contact springs 10, 10 are displaced, and, for example, the movable contacts 11, 11 move from one fixed contact 6 to the other fixed contact 5, It also moves from one fixed contact 5 to the other fixed contact 6, and the contacts are opened and closed. On the other hand, if the energization of the coil 23 is cut off, the operation opposite to that described above will be performed.

In this case, a bulge 27 is provided at the base end 26a of the armature 26, and when the coil 23 is excited and the free end of the armature 26 swings, the free end side of the bulge 27 becomes the fulcrum y. 26 is sucked in the direction of arrow Y toward the other end of the other yoke 13a, the base end 26a of the armature 26 also holds the fulcrum y in the direction of arrow Y' to promote rocking of the armature 26. The magnetic efficiency of the permanent magnet 14 is greatly improved. Further, since the bulging portion 27 is positioned so as to fill the gap between the base end 26a of the armature 26 and one end portion of one yoke 13, magnetic resistance can be lowered and sensitivity can be increased.

To further explain this point with reference to Fig. 8, Fig. A shows the case of the present invention, and since the rotation fulcrum of the armature is on the center side of the armature, the rotational force acting on the armature is divided into suction force 1 and suction force 2. In conventional example B, the rotating force of the armature is the difference between the suction force 2 and the suction force 1. It is clear that this also greatly improves the magnetic efficiency of the permanent magnet in the present invention.

Note that the above-mentioned bulge is not provided on the armature side, but rather on the base end 2 of the armature 26 as shown in FIG.
A bulge 2 is provided at one end of the yoke 13 facing the yoke 6a.
Even if 7a is provided, the same effect as in the above embodiment can be obtained.

According to the electromagnetic relay of the present invention configured as described above, by increasing the magnetic efficiency of the permanent magnet, the permanent magnet can be made smaller, the whole can be made smaller, and the reliability can be improved by increasing the sensitivity. Achieve remarkable effects such as being able to.

[Brief explanation of drawings]

1 is an exploded perspective view of the electromagnetic relay of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a vertical sectional view thereof, and FIG. 4 is a sectional view taken along the line - in FIG. 2, Fig. 5 is an enlarged and simplified explanatory diagram of the same part, Fig. 6 is a partially enlarged and simplified explanatory diagram of another embodiment of the present invention, Fig. 7 is a partially enlarged and simplified explanatory diagram of a conventional electromagnetic relay, and Fig. 8 is an explanation of the operation. It is an explanatory diagram. 1... Terminal body, 2... Recess, 3, 4... Fixed contact terminal, 5, 6... Fixed contact, 7, 8... Coil terminal,
9... Common terminal, 10... Movable contact spring, 11... Movable contact, 12... Magnet block, 13, 13a... Yoke, 14... Permanent magnet, 15... Recess, 16... Partition part, 17... Card, 18... Groove, 19...Coil frame,
20... Ampullae, 21... Recess, 22... Receiving groove, 23...
Coil, 24... Winding part, 25... Output terminal, 26... Armature, 26a... Base end, 26b... Free end, 2
7, 27a...Bulging portion, 28...Cover.

Claims (1)

[Claims] 1. A pair of yokes are arranged to sandwich a permanent magnet, and a group of switching contact members is arranged adjacent to the yokes,
A free end of an armature whose base end is held by a coil frame around which a coil is wound and which is swingably penetrated through the coil frame is positioned between one end of the yoke, and the swing of the armature opens and closes the opening/closing contact. 1. An electromagnetic relay in which a group of members is operated to open and close, characterized in that a bulge is provided at substantially the end of a side of the armature so that the pivot point of the armature is located toward the center of the armature.