JPS5975532A - Electromagnetic 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 The present invention relates to an electromagnetic relay, in particular, in which at least two armatures that also serve as iron cores are disposed in a coil, and the at least two armatures are simultaneously excited by a single excitation current by the coil. The present invention relates to an electromagnetic relay designed to do the following.

Conventional relays of this type, which will be explained in detail later using drawings, can achieve high sensitivity because the armatures can operate independently and each load can be reduced, but strictly speaking, many armatures can operate simultaneously. Because the operating current of the armature that does not operate and operates last is significantly larger than the operating current value of the armature that operates immediately before due to the magnet mechanism, the necessary armature operating current must be increased. ) There were some drawbacks.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electromagnetic relay that requires less armature operating current in a relay configured to simultaneously excite at least two armatures with excitation current as described above.

In the present invention, since the operating current value of the armature that operates independently at the end is large, none of the armatures are operated independently. In other words, all the armatures are made up of a combination of two or more armatures. For example, when the total number of armatures is 2, one 2-combined body is formed, when there are 6 armatures, one 3-combined body is formed, and when there are 4 armatures, one 4-combined body or 2 combined bodies is formed. When there are 5 pieces, 2 pieces and 3 pieces are made up of 1 piece each.

According to the present invention, in the relay in which at least two armatures that also serve as iron cores are disposed in a coil, and the at least two armatures are simultaneously excited by the coil, the at least two armatures are It is composed of an armature combination body in which two armatures are mechanically restrained and integrated, so that the armatures operate simultaneously for each combination body by the excitation, but do not operate independently. The integrating means may be a film of electrically insulating material having a predetermined amount of torsional stiffness.

Next, a detailed explanation will be given with reference to the drawings.

FIG. 1 is a partially cutaway perspective view of the structure of a conventional relay of this type. In FIG. 1, each independent seesaw armature 1 is fixed to an independently movable spring 2,
The armature 1 seesaws due to the magnetization direction of the magnet 4 disposed on the stationary plate 3, which forms a magnetic gap at both ends of the armature 1, and the magnetization direction of the coil 5, which simultaneously magnetizes the entire armature. In this relay, the armatures 1 can each operate independently and the load on each can be made very small, so this type of relay has a structure that allows for high sensitivity. However, since the magnet 4 is used to operate the armature 1, the operation of each armature 1 etc. depends on the suction force used to attract and hold the armature. ! Cha 1 actually operates out of order, not simultaneously.

The operating current value of the armature that operates last is always larger than the operating current value of the armature that operates immediately before, for reasons explained below. In other words, when each armature operates out of order, a magnetic gap is created at the end of the operated armature, so the magnetic flux that was previously required for holding and attracting flows into the other armatures, and when the last armature operates, the total magnetic flux of the magnet 4 is Because of this concentration, the operating current becomes significantly large. In addition, in Fig. 1.

6 is a base plate, 7 is a fixed contact, 8 is a movable contact, 9
1 is a terminal, 10 is a yoke, 11 is a housing, 12 is a housing cover, and 13 is a cover.

FIG. 2 is a sectional view of one embodiment of the present invention.

The housing 21 is a molded product in which a stationary plate 22 is insert-molded.

It also serves as a spool for the coil 24 together with the cover 26 which is also a molded product. Magnets 25 are arranged on the stationary plate 22 in the same direction. 26 and 27 are contacts, and the contacts are closed and opened by the seesaw movement of the armature 28. Contact spring 29 is necessary to generate contact pressure and is welded at the X mark 29a. In this embodiment, the armature 28 is integrated by molding (mold portion 30).

6 is a diagram showing the structure of a combined body in which the armature 28 and mold part 60 of FIG. 2 are integrated, (a) is a plan view, (b) is a side view, and (C) is (b) It is an AA sectional view of the figure. It can be seen from this figure that the two armatures 28 are integrated by molding.

FIG. 4 is a plan view of the spring 61 welded to the integrated armature assembly shown in FIG. 6, where 32 is a hinge spring portion and 66 is a hinge spring weld portion. Further, reference numeral 64 denotes an armature welding portion, where the back surface of the armature is exposed and welded at a welding point 35. By integrating two independent armatures and energizing them simultaneously in this way, the armatures can be magnetically excited independently and operationally operated as one unit. If six or more armatures are integrated.

These may be arranged in parallel.

In the above embodiment, the armature was integrated by molding, but molding cannot make it dimensionally thin, the mass of the integrated armature after molding becomes large, and there are also disadvantages in terms of vibration resistance, etc. be. Furthermore, since the armatures are tightly connected to each other, if the flatness of the armatures and the stationary plate are not made with high precision, the armature travel during seesaw operation may become small and the contact pressure may not be sufficient.

FIG. 5 is a diagram illustrating the structure of an embodiment of a song according to the present invention, and the same components as in FIG. 2 are given the same reference numerals. The electromagnetic relay shown in FIG. 5 is an example in which a Fourdrinier edge material film 41 is electrically used to integrate the armature 28. Film 41 is armature 2
The contact spring 29 is fitted into the groove 8, and the contact spring 29 is in close contact with the back surface, and welded at the X mark 29a.

The torsional rigidity of this film 41 is selected to be an appropriate value as will be described later, but it is relatively low. Note that if the central fulcrum part of the armature 28 comes into contact with the molded part of the housing 42, the mold will wear out, so it is necessary to add a base plate 43 to the central part.

In this figure, the base plate 46 is shaped like a continuation of the stationary plate 22.

FIG. 6 is a diagram showing a structure in which two armatures are integrated in the embodiment of FIG. 5, (a).

(b) and (0) are the same divisions as in FIG. The shape of the spring 29 welded to the armature shown in FIG. 6 is substantially the same as that shown in FIG. 4. By adopting the configuration shown in FIG. 6, the mass of the armature assembly is light and the torsional rigidity of the film 41 is also relatively low, so each armature 28 can move flexibly when it comes into contact with the stationary plate 22. Therefore, the contact force of the contacts becomes stable. However, the torsional rigidity Sf of the film 41 must satisfy the following formula.

Wheat 5f-Xa) Fmr maX ・・・・・・・・・
・・・・・・・・・(1) Sf −d (Fh min
・・・・・・・・・・・・・・・・・・・・・(2)
Here, Xa is the armature label, d is the allowable flatness, and F
mrmax is the demagnetizing holding force of the unoperated armature, Fhmi
n represents the holding suction force after operation.

Furthermore, in the above structure, the film 41 is attached to the armature 2.
It does not need to be completely fixed to 8.

Of course, it is sufficient to simply insert it between the armature 28 and the spring 29.

As explained below, in the case where there are two or more armatures, the present invention mechanically restrains the two or more armatures to each other so that they are magnetically independent (double excitation, and the operation is approximately By making it possible for the relay to move as one, and not leaving a single armature, the required maximum value of the operating current value can be avoided with almost no loss in the original characteristics of the relay. can.

Furthermore, if the two armatures are integrated using a film that satisfies the conditions of formulas (1) and (2) above, the increase in armature mass can be relatively small. Furthermore, since the rigidity of the film is low, the holding postures of the armatures can be held almost independently of each other. Therefore, more stable contact force, higher sensitivity, and faster operation can be achieved than completely fixing with a mold or the like.

Topo mortar

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the configuration of a conventional electromagnetic relay, and FIG. 2 is a sectional view of an embodiment of the present invention. Figure 3 is a detailed view of the configuration in which the two armatures in the embodiment of the present invention shown in Figure 2 are integrated by molding, Figure 4 is a view of the armature shown in Figure 6 with a spring welded to it, and Figure 5. 6 is a diagram showing a structure of another embodiment of the present invention, and FIG. 6 is a diagram showing a structure in which the two armatures V in the embodiment of the present invention shown in FIG. 5 are integrated with a film. Explanation of symbols: 21 is the housing, 22 is the stationary plate, 23 is the molded product cover, 24 is the coil, 25 is the magnet, 26 and 27 are the contacts, 28 is the armature, 29 is the contact spring, 29a is the contact spring on the armature The place to be welded, 31, is the spring. 62 is a hinge spring portion, 66 is a hinge spring welded portion, 64 is an armature welded portion, 35 is a welding point, 41 is a film, and 42 is a housing. 46 is a base plate, respectively. Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) In a relay in which at least two armatures that also serve as iron cores are disposed in a coil, and the at least two armatures are simultaneously excited by the coil, the at least two armatures are
It is characterized in that it is composed of an armature combination body in which two armatures are mechanically restrained and integrated, so that the armature operates simultaneously for each combination body by the excitation, but does not operate independently. Electromagnetic relay. (2) When the means for mechanically restraining and integrating is a film of an electrically insulating material having a predetermined size of torsional rigidity, and the armature combination is excited thereby and each armature operates simultaneously; 2. The electromagnetic relay according to claim 1, wherein each armature can maintain its own holding posture.