JPS5923413B2 - relay - Google Patents

Description

[Detailed description of the invention] This invention relates to a relay.

Conventionally, when assembling a single action type relay using latching action type relay parts, there are problems such as changing the shape of the armature, adding an auxiliary spring, etc., or increasing the number of parts. This was an obstacle to cost reduction.

Therefore, an object of the present invention is to provide a relay in which a latching relay and a single relay can be assembled from the same parts.

In this invention, the intermediate portions of a pair of armatures are fixed at a predetermined width to both sides of the intermediate portion of a band-shaped operating spring that has a fixed base end and movable contacts on both sides of the free end, so that both ends float from the operating spring. On the other hand, a pair of planar U-shaped yokes having different gap areas at both ends are disposed facing each other, and the armature is disposed between them, and both ends of the armature are opposed to the gap surfaces of each yoke, and the yoke A permanent magnet is interposed between the intermediate portions of the coil, with its magnetic pole facing the yoke, and the coil is disposed such that the armature is located at the center axis of the coil.

To obtain the latching characteristic, a pair of yokes with the same gap area are placed opposite each other, and the pair of armatures are attached to the operating springs at the same position.

In addition, in order to obtain single characteristics, a pair of yokes with different gap areas should be placed opposite each other, and the mounting position of the pair of armatures to the operating spring should be shifted to the side where the gap area of the opposing yokes of each armature is larger. Make it.

As a result, a single characteristic can be obtained without requiring an auxiliary spring.

In addition, relays with single characteristics and latching characteristics can be manufactured without changing the type of components, which can reduce costs.

An embodiment of the invention is shown in FIGS. 1 to 11.

First of all, Fig. 1(-) and Fig. 5 are latching action type relays, whose main parts are a pair of armatures.
, Ib are clampedly fixed on both sides, and a coil block 3 that inserts the operating spring 2 inside and holds its ends has a different gap area between the two ends of the coil blower 230. A pair of deformed U-shaped yokes 4a and 4b facing each other on both sides of the armature 10, a permanent magnet 5 installed between the yokes 4a and 4b, and a coil 6 wound around the middle part of the coil block 3. Operation spring 2
The yokes 4a and 4b are made up of a movable contact 7 fixedly installed at the swinging end of the yokes 4a and 4b, and a normally closed fixed contact 8 and a normally open fixed contact 9 facing the movable contact 7. The yokes 4a and 4b have equal gap areas at both ends. are arranged so that they are facing each other.

10 is a separator, 11 is a case, 12 is a common terminal, 1
2' is a fixed contact terminal, and 12'' is a coil terminal.

As shown in FIG. 5, the stable position of the operating spring 2 of this relay is a neutral position when viewed from both fixed contacts 8 and 9, and the armature 1a fixed to the operating spring 2.

Since the gap distances between the yokes 1b and the yokes 4a and 4b are all equal, and the gap areas between the opposing yokes are equal at the opposing portions, the magnetic attraction forces by the permanent magnets 5 also cancel each other out.

In this case, the operating spring 2 is connected to one of the yokes (for example, 4
When the yoke 4a and the armature 1 are moved in the direction a), the balance of the attractive force by the permanent magnet 5 is lost and the yoke 4a and the armature 1 are attracted in the direction of movement, resulting in a stable state.

Therefore, when a rated current higher than the moving current is supplied to the coil 6, the magnetic flux with the permanent magnet 5 cancels out and repulsion occurs, causing the operating spring 2 to move in the opposite direction, and the armature 1 becomes attracted to the opposing yoke 4b. Even if the current supply is stopped, the state is maintained by the permanent magnet 5 and a latching operation is performed.

FIG. 6 shows the spring load and attraction force curves for this relay with respect to armature travel.

In the figure, a curve P is a spring load line that appears symmetrically with respect to point U, a part P' is a spring load line with the common terminal 12 as a fulcrum, and a part P'' is a spring load line with the fixed part of the armature 1 as a fulcrum. With a spring loaded wire this gives contact pressure.

Curve Q is an attractive force characteristic curve due to the permanent magnet 5. When located on the NO (normally open) side or the NC (normally closed) side, the attractive force is set to be stronger than the spring load force, enabling latching operation. There is.

Curves R and R/ are impressed currents in coil 6 (directions are opposite to each other)
Curve S is the suction force characteristic curve when supplying.

S' is an attractive force characteristic curve when a rated current is supplied to the coil 6, and the latching operation is switched depending on the direction of current supply.

Next, the single action type relay is shown in Figures 7 to 1.
Shown in Figure 1.

That is, this relay uses the same parts as the first embodiment, including the yoke 4a.

As for 4b, the contact surfaces 13 of the armature are opposed to each other with different gap areas at both ends, and contact the intermediate part of the operating spring 2 from both sides in a pinching manner.
14 are combined so as to be offset from each other in the longitudinal direction of the operating spring 2.

Other assembly configurations are the same as in the first embodiment.

In this case, as shown in FIG.
is stable in a neutral state, and the attraction of the armatures la and 1b by the permanent magnet 5 is thicker on the opposite end side of each yoke where the gap area is larger than the other. The contact 7 is brought into contact with the normally closed fixed contact 8 for stability.

That is, the attraction force curve W due to the permanent magnet 5 in FIG. 12 is lowered by a certain amount compared to the curve Q in FIG. 6, and always moves toward the normally closed side both in the neutral position A and on the normally open side. Single characterization becomes possible by receiving the attraction force.

Therefore, when a current higher than the sensing current is supplied to the coil 6, the magnetic flux of the permanent magnet 5 is canceled out, a repulsive force is generated, and the operating spring 2 moves toward the normally open fixed contact 9.

Furthermore, the armature 10 contact surface 1 is fixed to the operating spring 2.
3.14 are shifted from each other in the longitudinal direction of the operating spring 2, the distance between the common terminal 12 and the end of the abutting surface and the distance between the movable contact 7 and the end of the abutting surface change when the operating spring is activated and when it returns. Since the spring load is different between the two, the spring load becomes different, and the spring load upon contact with the normally closed contact can be weakened, the contact pressure can be increased, and the single operation can be made more reliable.

FIG. 12 shows the spring load and attraction force curves for armature travel of this relay corresponding to FIG.
The spring load generated by the fulcrum a and fulcrum A on the normally open) side,
The NC (normally closed) side is the spring load generated by the fulcrums C and d.

Curve X is an attractive force curve due to the impressed current of the coil, curve Y is an attractive force curve due to the open current of the coil, and curve 2 is an attractive force curve due to the rated current of the coil.

As described above, in the relay of the present invention, by arranging a pair of yokes with different gap areas at both ends facing each other or in opposite directions, a relay for latching operation and a relay for single operation can be assembled with the same parts, and This has the effect of reducing the number of parts and reducing the cost of various relays.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a latching type relay according to an embodiment of the present invention, Fig. 2 is a horizontal sectional view of the assembled state, Fig. 3 is a sectional view taken along the line ■-■, and Fig. 4 is Fig. 8. X-
An X-ray cross-sectional view, FIG. 5 is an explanatory diagram of the operation of this relay, FIG. 6 is a spring load and attraction force curve for armature movement, and FIG. 7 is an exploded perspective view of the single type relay.
Figure 8 is a horizontal sectional view of the assembled state, Figure 9 is its IX
-IX sectional view, FIG. 10 is a sectional view taken along line XX in FIG. Ia, 1b... Armature, 2... Operating spring, 3
...Coil block, 4a, 4b...Yoke, 5.
...Permanent magnet, 6...Coil, 7...Movable contact, 8
... Normally closed fixed contact, 9... Normally open fixed contact.

Claims (1)

[Claims] 1. A strip-shaped operating spring whose base end is fixed and has movable contacts at both ends of the free end, and a pair of strip-shaped operating springs whose intermediate parts are each fixed to a predetermined width on both sides of the intermediate part of this operating spring, with both ends floating from the operating spring. an armature; a pair of yokes having a U-shape in plan view having different gap areas at both ends and facing each other in the operating direction of the operating spring with the armature in between; and having each gap surface facing both ends of the armature; , a permanent magnet interposed between the intermediate portions of these yokes with each magnetic pole facing each yoke, and a coil arranged so that the armature is located at the central axis, and in the case of latching characteristics, the gap between the yokes The yokes with the same area should face each other and the mounting positions of the pair of armatures to the operating springs should be the same, and in the case of a single characteristic, the yokes with different gap areas should face each other and the pair of armatures should be attached to the operating springs in the same position. A relay characterized in that the mounting position is shifted to the side where the gap area between the opposing yokes of each armature is larger.