JPH0512902Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to relays.

[Background technology]

A conventional hinge-type relay is shown in FIG.
As shown in the figure, in this relay, by exciting the coil 10 wound around the iron core 12, the substantially V-shaped armature 14, which is hinged to one end 133 of the yoke 13, is connected to the free end of the iron core 12 ( other end) 122
It is designed so that it can be swung in such a way that it approaches and leaves. The swinging of the armature 14 moves the movable contact spring 23, opening and closing the space between the fixed contact 20 and the movable contact 21.

In this relay, a fixed contact 20 and a movable contact 21
In order to obtain stable opening/closing operation between the hinge spring 23 and the movable contact spring 23,
a to press the armature 14 to prevent the swing fulcrum 143 of the armature 14 from shifting from the one end 133 of the yoke.

However, in the conventional relay, the hinge holding spring 23a prevents the swinging fulcrum 143 of the armature 14 from shifting from the one end 133 of the yoke, making assembly difficult and requiring adjustment after assembly. It was something to do.

[Purpose of invention]

In view of the above circumstances, the object of this invention is to provide a relay that has stable contact opening/closing operations, is easy to assemble, and does not require adjustment after assembly.

[Disclosure of invention]

In order to achieve the above object, this invention has a yoke coupled to one end of an iron core around which a coil is wound, and an armature that is magnetically connected to one end of the yoke so as to be swingable and moves into and out of contact with the other end of the iron core. In a relay that includes an electromagnetic device that is configured to oscillate, and a contact mechanism that is opened and closed by the oscillation of the armature, the armature is attached to the back of the oscillation fulcrum of the armature. a contact for keeping the swinging fulcrum of the armature within a predetermined distance from the one end of the yoke so that the swinging fulcrum can engage the one end of the yoke when the armature is moved to contact the other end of the iron core; The gist of the relay is that a pole guide is provided, and the armature guide is formed in an arc shape centered on one end of the yoke.

This invention will be explained in detail below with reference to the drawings showing one embodiment thereof.

Figures 1a to 1e show an embodiment of the relay according to this invention. In addition, in FIG. 1b, the movable insulator 5 and walls 62 and 63, which will be described below, are omitted.

As shown in these figures, this relay is equipped with an electromagnet device 1 and a contact mechanism 2 arranged on a base 3, and is attached to the base 3 so as to cover the electromagnet device 1 and the contact mechanism 2. It has a cover 4 attached thereto.

The electromagnet device 1 includes a coil 10, a coil frame 11,
It includes an iron core 12, an L-shaped yoke 13, and an armature 14. The coil 10 is wound around an iron core 12 via a coil frame 11. Coil connection terminals 71 for connecting the ends of the coil wires are fixed to both end flanges of the coil frame 11. This coil connection terminal 71 is passed through a coil connection terminal insertion hole 31 formed in the base 3, and has one end thereof projected outside the base 3. An L-shaped yoke 13 is coupled to one end 121 of the iron core 12 at one side 131 thereof. Other side 13 of L-shaped yoke 13
2 extends along the side of the coil 10, and its tip (one end of the L-shaped yoke) 133 is connected to the other end of the iron core 122.
is facing. The armature 14 is bent into a substantially F-shape, and is arranged such that the inner corner 143 of the bent portion is separated from one end 133 of the L-shaped yoke 13 by a distance l. And this armature 14
In this case, one side 141 bordering on the bent part is the other end 1 of the core.
22, the tip of one side 141 faces the other end 122 of the core, and the other side 14
2 extends to face the other side 132 of the yoke and forms a tail portion. An armature guide 61 is provided outside the bent portion of the armature 14 (at the back of the corner 143 inside the bent portion). This armature guide 6
1 (the surface in contact with the outer surface of the bent portion of the armature 14 in FIG. 1A) is formed in an arc shape centered on one end 133 of the yoke. By providing this armature guide 61, the armature 14
The inner corner 143 of the bent portion is L-shaped yoke 1.
In other words, the distance between the corner 143 and the one end 133 is kept within a predetermined distance. As described above, the armature 14, which is magnetically connected to the one end of the yoke 133 in a swingable manner, is able to connect the tip of the one side 141 to the other end of the iron core by energizing the coil 10 or cutting off the excitation. It swings toward and away from the object. The movement of the armature 14 will be described in detail later.

The contact mechanism 2 is located on the side of the electromagnetic device 1 (the armature 1
The fixed contact 20 and the movable contact 21 facing each other are arranged on the side where the tail portion 142 of 4 is provided.
It has The fixed contact 20 is fixed to a fixed contact spring 22. Moreover, the movable contact 21 is
It is fixed to the movable contact spring 23. These fixed contacts 20 and movable contacts 21 are fixed by caulking or the like. A fixed contact terminal 22a is formed in the fixed contact spring 22. The fixed contact spring 22 is fixed to the base 3 by inserting its fixed contact terminal 22a into a fixed contact terminal insertion hole formed in the base 3. A movable contact terminal 23a is formed in the movable contact spring 23. The movable contact spring 23 also has its movable contact terminal 23
a is inserted into a fixed contact terminal insertion hole formed in the base 3 and fixed to the base 3. Although not shown, a sealant (sealing resin such as adhesive) is applied to the coil connection terminal insertion hole 31, the fixed contact terminal insertion hole, and the movable contact terminal insertion hole after the terminal is inserted thereinto. is poured in, and the gap between each insertion hole and the terminal is sealed with this sealant.

Tail portion 142 of armature 14 and movable contact spring 2
A movable insulator 5 made of an insulating material is interposed between the two walls 142 and 3, and two walls 62 and 6 are arranged in parallel to block the space between the two walls 142 and 23.
3 is provided. The movable insulator 5 consists of a side 51 bridging between the tail portion 142 and the movable contact spring 23 and a side 52 intersecting this side 51, and is formed in a cross shape as a whole. On the other hand,
The sides 51 of the movable insulator 5 are attached to the two walls 62 and 63.
Slits 62a and 63a are formed for passing the material. The movable insulator 5 is arranged so that one side 52 is interposed between the walls 62 and 63, and both ends of the other side 51 protrude from the slits 62a and 63a to the outside of the walls 62 and 63. The slits 62a and 63a are used as guides to allow sliding in the forward and reverse directions. Furthermore, the movable insulator 5 is always urged in the direction toward the tail portion 142 by the elastic force of the movable contact spring 23.

As described above, in this relay configured as above, by swinging the armature 14,
The tail portion 142 is also swung. This movement is transmitted to the movable contact spring 23 via the movable insulator 5 in contact with the tail portion 142, the movable contact spring 23 is moved, and the space between the fixed contact 20 and the movable contact 21 is opened and closed. There is. To explain in detail, it works as follows. That is, coil 1
0 is excited, the tip of one side 141 of the armature 14 is attracted to the other end 122 of the iron core (at this time, the attraction force is greater than the biasing force of the movable contact spring 23).
Along with this, the tail portion 142 is
Moved away from 2. Due to this movement, the movable insulator 5 is moved in the direction toward the movable contact spring 23, the movable contact spring 23 is bent toward the fixed contact spring 22, and the space between the movable contact 21 and the fixed contact 20 is closed. It will be done. From this state, when the excitation of the coil 10 is cut off, one side 1 of the armature 14
41 and the other end of the core 122 disappears, and the movable contact spring 23 returns to its original state (the state shown in FIG. 1a) by its own elastic force. Along with this, the fixed contact 20 and the movable contact 21
At the same time, the movable insulator 5 is moved in the direction toward the tail portion 142. This movement of the movable insulator 5 causes the tail portion 142 to move closer to the other side 132 of the yoke, and in conjunction with this, the tip portion of one side 141 of the armature 14 is separated from the other end 122 of the iron core.

During the above operation, the armature 14 is further moved as follows.

FIG. 2a shows the state of the armature 14 when the coil 10 is de-energized. As shown in the figure, the states of the armature 14 when the excitation of the coil 10 is cut off are as shown by, for example, the solid line, the one-dot chain line, and the two-dot chain line. That is, the corner 143 on the inside of the bent portion of the armature 14 is separated from the one end 133 of the yoke. When the coil 10 is excited from this state, the armature 14 is attracted to one end 133 of the yoke, and at some point the second
As shown in FIG. b, an inner corner 143 of the bent portion of the armature 14 comes to engage with one end 133 of the yoke. After engagement, the armature 14 is attached to the inner corner 14 of the bend.
3 as a fulcrum. In other words, the corner 143 on the inside of the bent portion of the armature 14 serves as a pivot point for the armature 14 to swing.

In order to obtain a stable opening/closing operation between the fixed contact 20 and the movable contact 21, it is necessary to perform at least the period from the state in which the coil 10 is de-energized until the movable contact 21 contacts the fixed contact 20 (the point of moving voltage). The swinging fulcrum 143 of the armature 14 is at one end of the yoke 1.
33 must be fully engaged. Whether the engagement is possible or not between the two is determined by
Swing fulcrum 143 of armature 14 and one end of yoke 133
It is determined by the distance l between If the distance l is within a predetermined distance, the engagement is possible between the two, and if the distance l exceeds the predetermined distance, the engagement is impossible. In this relay, an armature guide 61 is provided on the outside of the bending part of the armature 14 (at the back of the swing fulcrum 143), so that the swing fulcrum 143 of the armature 14 does not move away from the one end of the yoke 133 by more than a predetermined distance. It is like that. Therefore, the swing fulcrum 143 of the armature 14 is maintained within a predetermined distance from the one end 133 of the yoke, and the swing fulcrum 143 of the armature 14 is completely engaged with the one end 133 of the yoke by the point of the impressed voltage, resulting in stable This results in a contact opening/closing operation. In this embodiment, since the inner surface of the armature guide 61 is formed in an arc shape centered on one end of the yoke 133, it can be drawn in any of the states shown in FIG. In this case, the distance l can be kept constant, and even more stable contact opening/closing operation can be obtained.

FIG. 3 shows the attraction force curve and the spring load curve. In the figure, α is the distance l between the swing fulcrum 143 of the armature 14 and the one end 133 of the yoke.
β is the attraction force curve of the above embodiment, γ is the spring load curve, P is the point of the moving voltage, and Q is the point when the swinging fulcrum 143 of the armature 14 fully engages with one end of the yoke 133. The dot and stroke indicate the distance between the other end 122 of the iron core and the tip of one side 141 of the armature.

As shown in the figure, in the embodiment, the same suction force is obtained after the swing fulcrum 143 of the armature 14 is completely engaged with the one end 133 of the yoke, compared to when the distance l is 0. From this, it can be seen that the swing fulcrum 143 of the armature 14 is
is completely engaged with one end of the yoke 133, it is possible to make the contact pressure between the movable contact 21 and the fixed contact 20 the same value as when the distance l is 0 (ideal case). It can be seen that the contact opening/closing operation can be stabilized.

The relay according to this invention is not limited to the above embodiment.

[Effect of idea]

As seen above, in the relay according to this invention, a yoke is coupled to one end of an iron core around which a coil is wound, and an armature that is magnetically connected to one end of the yoke so as to be able to swing is connected to the other end of the iron core. In a relay equipped with an electromagnetic device that is designed to swing toward and away from the other hand, and a contact mechanism that is opened and closed by the swinging of the armature, this The swinging fulcrum of the armature is maintained within a predetermined distance from the one end of the yoke so that the swinging fulcrum can engage the one end of the yoke when the armature is moved to contact the other end of the iron core. An armature guide is provided for the yoke, and this armature guide is characterized in that it is formed in an arc shape centered on one end of the yoke. Therefore, stable contact opening/closing operation can be obtained. Moreover, parts (means) such as a hinge presser spring, which are required in conventional relays, are not required. Also, when assembling,
It is easy to assemble the armature, as it is only necessary to assemble the armature so that the swinging fulcrum of the armature is located between the armature guide and one end of the yoke.
No adjustment necessary.

[Brief explanation of the drawing]

Fig. 1a is a plan view showing one embodiment of the relay according to this invention, Fig. 1b is a front view of the embodiment, Fig. 1c is a left side view of the embodiment, Fig. 1d
1 is a right side view of the embodiment, FIG. 1e is a bottom view of the embodiment, FIG. Graph showing the spring load curve, 4th
The figure is a sectional view showing a conventional relay. 1... Electromagnet device, 2... Contact mechanism, 10...
Coil, 12... Iron core, 13... Yoke, 14...
... Armature, 20 ... Fixed contact, 21 ... Movable contact, 61 ... Armature guide, 121 ... One end of iron core, 122 ... Other end of iron core, 133 ... One end of yoke, 143 ... Swinging of armature fulcrum.

Claims (1)

[Scope of utility model registration request] An electromagnetic device in which a yoke is coupled to one end of an iron core around which a coil is wound, and an armature that is magnetically connected to one end of the yoke so that it can swing can swing toward and away from the other end of the iron core. and a contact mechanism that is opened and closed by the swing of the armature, the back of the swing fulcrum of the armature having:
The swinging fulcrum of the armature is set within a predetermined distance from one end of the yoke so that the swinging fulcrum can engage the one end of the yoke when the armature is moved to contact the other end of the iron core. A relay characterized in that an armature guide is provided for maintaining the armature, and the armature guide is formed in an arc shape centered on one end of the yoke.