JPS61271728A - 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] 〔Technical field〕 The present invention relates to a relay.

[Background technology]

In a relay, the dimensions of the permanent magnet are naturally determined in order to ensure the desired magnetic attraction force. Conventionally, relay dimensions were determined based on this dimension. However,
The need to secure a space to accommodate the permanent magnets naturally led to the problem of increasing the size of the relay.

[Purpose of the invention]

In view of the above circumstances, an object of the present invention is to provide a relay that can secure a desired magnetic attraction force without increasing the size.

[Disclosure of the invention]

In order to achieve the above object, the present invention provides a first M18i
The first magnetic pole part is magnetically connected to the second magnetic pole part through an iron core around which a coil is wound, and the second magnetic pole part is magnetically connected to the second magnetic pole part by excitation of the coil. The armature block includes an electromagnet block having a polarity different from the magnetic pole part of the armature block, and an armature block in which two opposing magnetic pieces sandwich a permanent magnet from both sides in the magnetization direction. The first magnetic pole part of the electromagnet block is inserted between the two magnetic pieces, and the blocks are combined so that each magnetic pole part of the electromagnet block and each magnetic piece of the armature block face each other, In a relay, the armature block moves in forward and reverse directions due to changes in the excitation state of the coil, and this movement is transmitted to the contact mechanism to open and close the contacts.
The gist of the relay is characterized in that a step is provided on the inner surface of the portion of the magnetic material piece in contact with the permanent magnet to make the thickness different.

An embodiment of this will be explained in detail below based on the accompanying drawings.

As shown in FIGS. 1 and 2, this relay includes an electromagnet device 1, a contact mechanism 2, and a movable insulator 3 that transmits the movement of the electromagnet device to the contact mechanism, housed in a box-shaped base 4. A case 5 is placed over the box-shaped base 4.

The electromagnet device 1 includes an electromagnet block 6 and an armature block 7
Consisting of The electromagnetic block 6 includes a coil frame 62 around which a coil 61 is wound, an iron core 63, and a yoke 64. The coil frame 62 is provided with coil terminals 65 at its rear end and pivot points 66, 66 for the armature block 70 at both ends thereof. The yoke 64 has a U-shape, and ends of opposite sides are connected by a rigid body 64a. Two protrusions 64b are formed on each of the outer surfaces of the opposite sides. The coil frame 62 and the yoke 64 are combined so that the coil 61 of the coil frame 62 is housed within the yoke 64. The iron core 63 passes through the inside of the coil frame 62, so that the coil 61 is wound through the coil frame. One end 63a of the iron core is a hole 64C formed in the yoke 64.
It is fitted and fixed. Free end 63 of iron core 63
A rigid body 64a of the yoke 64 faces b, and when the coil 61 is excited, it becomes a first magnetic pole portion and a second magnetic pole portion having different polarities. The armature block 7 includes two magnetic pieces 71.
71 and a permanent magnet 72.

The two magnetic pieces 71.71 have a portion 71a in contact with the permanent magnet, and a portion 71 facing the magnetic pole portion on the inner surface of 71a.
A step is provided to make the thickness different between the inner surface of the magnetic material piece 71b and the inner surface of the magnetic material piece 71b, and the thickness of the magnetic material piece is different at that part (the part in contact with the permanent magnet). 2
The two magnetic pieces 71.71 and the permanent magnet 72 are combined so that the two magnetic pieces 71.71 sandwich the permanent magnet 72 from both sides in the direction of magnetization. A recess 31 is formed in the movable insulator 3, and the armature block 7 is fitted into the recess 31. Moreover, the movable insulator 3 is
A card 32 is protruded from the bottom, and the overall size is L.
It is shaped like a letter. A groove 33 is formed at the tip of the card 32 to sandwich a movable contact spring 21 of a contact mechanism 2, which will be described later. Cylindrical shafts 34, 34 are formed on both sides of the movable insulator 3, respectively. The movable insulator 3 in which the armature block 7 is incorporated inserts the first magnetic pole part of the electromagnet block 6, that is, the free end 63'a of the iron core 63, between the magnetic pieces 71 and 71 of the armature block 702. Then, each magnetic pole part of the electromagnet block 6 and each magnetic piece of the armature block face each other, and the shafts 34 and 34 of the movable insulator 3 are connected to the coil frame 6 of the electromagnet block 6.
It is combined with the electromagnet block 6 by being fitted into the rotation fulcrum 66.6β of No. 2. The movable insulator 3 is rotated in forward and reverse directions about rotational fulcrums 66 and 66 of the coil frame 62 as a result of changes in the excitation state of the coil 61 of the electromagnetic block 6.

The contact mechanism 2 includes a movable contact spring 21 and a short fixed terminal plate 22.
A and a long fixed terminal plate 22b are combined. The two fixed terminal plates 22a and 22b, long and short, are in the shape of a square, and fixed contacts 23a and 23b are formed on the negative sides thereof. The fixed contacts 23a are formed on the upper surface of the short fixed terminal plate 22a, and the fixed contacts 23b are formed on the lower surface of the long fixed terminal plate 22b. Both fixed terminal plates 22a, 2
The other end side of 2b where fixed contacts 23a and 23b are formed is bent in a direction perpendicular to the terminal plate to form fixed contact terminals 24a and 24b, respectively. A movable contact terminal 25 is attached to one end of the movable contact spring 21.

On the free end side of the movable contact spring 21, movable contacts 26, 26 are formed on both upper and lower surfaces. The movable contact spring 21 moves from the surface 21a having the movable contact 26.26 to the terminal fixing portion 21.
It is bent in a step-like manner towards b. Movable contact spring 21
A bent part 21C bent in the shape of a central step is cut out,
The edge 28 provided along the width direction from this notch 27 toward the movable contact 26.26 is the card 32 of the movable insulator 3.
It is designed to be sandwiched between grooves 33 at the tip.

The box-shaped base 4 is made of an insulating material, has an opening at the top and one of both ends in the longitudinal direction, and is partitioned internally by a wall 41 made of an insulating material to form two spaces 42 and 43. . The electromagnet device 1 is housed in the upper space 42, and the contact mechanism 2 is housed in the lower space 43.

Holes 4 are provided in the upper portions of both outer walls 44a and 44b in the width direction of the base 4.
5... are formed on the outer wall, two each. This hole 45
... are fitted into the protrusions 64b of the yoke 64, and the electromagnet device l is fixed to the base 4. Electromagnet device 1
The coil terminals 65 are pushed through the coil terminal holes 47 formed in the base 4 and protrude from the bottom surface of the base 4. In FIG. 1, the figure shown within the two-dot chain line is a view of the fixed terminal plate 22b and the base 4 in the direction of arrow A. base 4
Grooves 46a, 46b are formed along the longitudinal direction in the lower portions of the outer walls 44a, 44b. The fixed terminal plate 22a is inserted and fixed into the groove 46a, and the fixed terminal plate 22b is inserted and fixed into the groove 46b.The groove 46a is formed closer to the bottom surface of the base than the groove 46b. In addition, the outer walls 44a, 44
A groove 47.47 is formed in the lower inner surface of b along the longitudinal direction from the longitudinal opening, and both sides 29.29 of the fixed part 21b of the movable contact spring 21 are inserted and fixed into this groove 47.47. It looks like this. Furthermore, windows 80 and 80 are opened in the lower portions of the outer walls 44a and 44b of the base 4, respectively, so that the contact portions can be visually observed from the outside.

In this relay, the inside of the base 4 is partitioned by a wall made of an insulating material to form two spaces 42 and 43, one space 42 houses the electromagnet device 1, and the other space 43
Since the contact mechanism 2 is housed in the contact mechanism 2 to improve the insulation between the electromagnet device 1 and the contact mechanism 2, the magnetic field from the electromagnet device 1 does not have an adverse effect on the contact mechanism.

Next, the contact opening/closing operation of this relay will be explained based on FIG. 2.

Since the electromagnet block 6 has a difference in magnetic resistance on both the upper and lower sides sandwiching the iron core 63 (the rigid body 64a serving as a magnetic pole portion is provided only on one side), this electromagnet device 1
This is a single stipple type electromagnet device in which the magnetic pieces 71, 71 are attracted toward the rigid body 64a in a non-excited state. In the non-excited state, the magnetic pieces 71', 71 are rigid body 64.
Since it is attracted in the a direction, the movable contact 26 formed on the movable contact spring 21 connected to and interlocked with the armature pro 7 by the movable insulator 3 is always pressed against the fixed contact 23b. When the coil 61 is excited, a magnetic absorption/repulsion force acts, and the movable insulator 3 is rotated about the rotation fulcrum 66 in the direction of the arrow in the figure. As the movable insulator 3 rotates, the movable contact spring 21 is pushed down, and the movable contact 26 is pressed against the fixed contact 23a. That is, in the non-energized state, the movable contact 26 and the fixed contact 23b are closed, and in the energized state, the movable contact 26 and the fixed contact 233 are closed. As described above, the coil 61
The armature block is rotated in the forward and reverse directions by a change in the excitation state, and this movement is transmitted to the contact mechanism 2 by the movable insulator 3, thereby opening and closing the contact.

If the electromagnet device l of this relay is simplified, it will become as shown in FIG. 3. As shown in the figure, this electromagnet device consists of two magnetic pieces 71 and 71 of the armature block.
A step is provided on the inner surface of the portions 71a, 71a that are in contact with the permanent magnet 72 to make the thickness different. The dimensions of the permanent magnet are determined naturally to ensure the desired magnetic attraction. The plate thickness of the portions 71b, 71b of the magnetic material pieces 71, 71 facing the magnetic pole portions of the electromagnet block is also determined by the magnetic gap G determined from the contact performance. Based on the dimensions of the permanent magnet, the thickness of the portions 71a, 71a of the magnetic material pieces 71.71 in contact with the permanent magnet 72 is adjusted to the thickness of the portions 71b, 71b of the electromagnet block facing the magnetic pole portions. , the entire armature block is necessarily large.

Along with this, the overall size of the relay also increases. However, the portions 71b and 71 facing the magnetic pole portions of the electromagnet block
The plate thickness of b is determined by the magnetic gap G, and a step is provided on the inner surface of the part of the magnetic material piece in contact with the permanent magnet to make the plate thickness different, and between the inner surfaces of the part in contact with the permanent magnet, By ensuring a size that can accommodate a permanent magnet of the size required to obtain the desired magnetic attraction force, the influence of the permanent magnet size on the armature block size can be absorbed by this step, so the relay size This makes it possible to secure the desired magnetic attraction force without increasing the magnetic force.

The relay according to the present invention is not limited to the above embodiments,
In the electromagnet device, as shown by the dashed line in FIG. 3, the magnetic pole part 64a facing the magnetic pole part 63b may be divided into two parts, and the two parts may be opposed to each other with the magnetic pole part 63b in between.

〔Effect of the invention〕

As we have seen above, this relay has a step on the inner surface of the magnetic piece of the armature block in the part that contacts the permanent magnet to make the plate thickness different. The influence on the dimensions of the armature block can be absorbed by this step. Therefore, the desired magnetic attraction force can be secured without increasing the dimensions of the relay.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the relay according to the present invention, Fig. 2 is a cross-sectional view of the same after assembly, and Fig. 3 is a simplified diagram of the electromagnetic device shown above. FIG. 2...Contact mechanism 6...Electromagnetic block 7...
Armature block 07 23a, 23b, 26 = contact 61
Coil 63 Iron core 63b Free end of iron core (first magnetic pole part) 64a Rigid body (second magnetic pole part) 71 Magnetic piece 71a Permanent magnet Contact part 72... Permanent magnet agent Patent attorney Takehiko Matsumoto Figure 2

Claims (2)

[Claims] (1) It has a first magnetic pole part and a second magnetic pole part facing the first magnetic pole part, and the first magnetic pole part is magnetically connected to the second magnetic pole part through an iron core around which a coil is wound. , an electromagnetic block that has a polarity different from the second magnetic pole part by excitation of a coil, and an armature block in which two opposing magnetic pieces sandwich a permanent magnet from both sides in the direction of magnetization. The first magnetic pole part of the electromagnet block is inserted between the two magnetic pieces of the armature block, and each magnetic pole part of the electromagnet block and each magnetic piece of the armature block are opposed to each other. In a relay in which the blocks are combined, the armature block moves in forward and reverse directions due to changes in the excitation state of the coil, and this movement is transmitted to the contact mechanism to open and close the contacts, the permanent magnet of the magnetic piece A relay that is characterized by having a step on the inner surface of the part that comes into contact with it to make the thickness different. (2) The relay according to claim 1, wherein the second magnetic pole part is divided into two parts, and these parts face each other with the first magnetic pole part in between.