JP3076383B2 - Polarized relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balanced amateur type polarized relay.

[0002]

2. Description of the Related Art As a conventional polarized relay, a coil block in which a coil is wound around a substantially U-shaped iron core, and both end portions which are interposed between both side portions of the iron core and are opposed to the both side pieces are provided. A permanent magnet magnetized to the same pole and a center portion magnetized to a different polarity, and armatures arranged on the permanent magnet so as to be swingable and having both ends opposed to both ends of the iron core, respectively. There is a so-called balance amateur type in which a contact is opened and closed by swinging.

[0003]

By the way, in the above-described balanced armature type polarized relay, in order to reduce the attractive force, the lower surface of both ends which are the magnetic pole surfaces of the armature 51 shown in FIG. (It is a perspective view seen from the lower surface side), and the residual plate 60 is fixed by welding or the like.

However, with the recent miniaturization of the polarized relay, the armature 51 has become smaller, and therefore, the size of the resilience plate 60 has also become smaller. Therefore, it is difficult to fix the residual plate 60 to the armature 51. Had become. That is, there is a problem that it is difficult to manufacture the armature 51 having a structure capable of reducing the suction force. The present invention has been made in view of the above points, and an object of the present invention is to provide a polarized relay capable of easily manufacturing an armature having a structure capable of reducing an attractive force. is there.

[0005]

According to the present invention, in order to achieve the above object, a concave portion is formed in the magnetic pole surfaces on the lower surfaces at both ends of the armature. In addition, a contact spring having movable contacts fixed to both ends is integrally attached to the upper surface of the armature, and a fixed portion of the movable contact is projected laterally beyond both ends of the armature. When the contact spring is formed in a shape in which the tip is separated from the armature and the concave portion is formed by punching and the surface on the contact spring side is projected, when the concave portion is formed by projection, the portion protrudes to the upper surface side. In addition, it is possible to have a function of releasing the contact when the contact is welded.

[0006]

The present invention focuses on the point that when the distance between the lower surface at both ends of the armature and the permanent magnet is widened, the same effect of reducing the attractive force as in the case of the resitual plate can be obtained. In addition, as long as it is a concave portion, even a small armature can be easily formed, and an armature having a structure capable of reducing a suction force can be easily manufactured.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The polarized relay of this embodiment has a casing formed of a box-shaped base 11 having an open upper surface and a cover (not shown) fitted to the base 11 in a box shape having an open lower surface. The coil block 3, the permanent magnet 4, and the armature block 5 are housed in the casing.

[0008] The base 11 is formed of an insulating material such as a synthetic resin.
It is separated into two storage spaces by a partition wall 13 formed at the center. The coil block 3 is stored in one storage space separated by the partition 13, and the permanent magnet 4 and the armature block 5 are stored in the other storage space. Base 1
1, a common terminal 21, two fixed terminals 22, and three coil terminals 24 are insert-molded. Terminal 2
The reference numerals 1 and 22 hang down along the outer surface of the side wall on which the permanent magnet 4 and the like are accommodated, and the upper end of the common terminal 21 is exposed on the bottom surface of the recess 14 formed at the center of the side wall.
Recesses 1 formed on both end walls on the side for accommodating permanent magnets 4 and the like
5, the upper end of the fixed terminal 22 is exposed on the bottom surface.
A fixed contact 23 is fixed to an exposed portion of the fixed terminal 22. The coil terminal 24 is hung downward along the side wall on which the coil block 3 is housed, and the upper end of the coil terminal 24 is exposed from the recess 16 formed in the side wall and the end wall for housing the coil block 3. is there. A recess 17 for swingably supporting the armature 51 is formed in the side wall and the partition wall 13 of the base 11 on which the permanent magnet 4 and the like are accommodated.

The coil block 3 has a substantially U-shaped iron core 31.
And a coil 32 wound around the center of the iron core 31. Here, a coil bobbin 33 around which the coil 32 is wound
A connecting piece 34 and a fixed piece 35 for connecting the ends of the coil 32 are respectively protruded from the flange 33, and the connecting piece 34 is connected to the coil terminal 24 exposed from the recess 16 on the side wall.
The coil 32 is connected to the coil terminal 24, and the fixing piece 35 is fixed to the coil terminal 24 exposed from the concave portion 16 of the end wall by spot welding or the like, and the coil block 3 is fixed to the base 11.

The permanent magnet 4 has a flat plate shape, and the opposite ends of the core 31 are magnetized to the same polarity, the center is magnetized to a different polarity, and protrudes toward the storage space for accommodating the permanent magnet 4 and the like. Between the two sides of the iron core 31. Armature block 5
As shown in FIG. 2, a plate-shaped armature 51 made of a magnetic material
A conductive contact spring 52 fixed to the armature 51;
And a movable contact 57.

As shown in FIG. 1, the lower surfaces of both ends of the armature 51, which become the magnetic pole surfaces, are tapered surfaces 51a inclined obliquely upward to reduce the gap between the magnetic pole surfaces and the permanent magnets 4 when swinging. Leakage magnetic flux from the permanent magnet 4 is efficiently picked up to improve magnetic efficiency. A swing fulcrum 53 projects from the center of both side surfaces, and each swing fulcrum 53 is fitted into one side wall of the base 11 and the recess 17 formed in the partition wall 13 so as to swing freely on the base 11. Can be stored.

The magnetic pole face of this armature 51 is
As shown in (a), the concave portions 58 are formed respectively. As described above, the recesses 58 are formed on the lower surfaces of both ends of the armature 51 which are the magnetic pole surfaces.
Is formed, the suction force can be reduced. In other words, by partially increasing the distance between the lower surfaces at both ends of the armature 51 and the permanent magnets 4 by the concave portions 58, the effect of reducing the attractive force similar to that of the resitual plate can be obtained. In addition,
In the case of this embodiment, the concave portion 58 is formed to have a size substantially equal to that of the residual plate to reduce the suction force. When the suction force is reduced by the concave portion 58 as described above,
Since the recess 58 can be easily formed even with a small armature 51, the armature 51 having a structure capable of reducing the suction force can be easily manufactured. Moreover, the recess 58 is provided with the armature 51
Has the advantage that it can be formed at the same time as the formation of the substrate, and it is possible to suppress the variation in the magnetic characteristics smaller than in the case of the residual plate, and it can be expected that the variation in the characteristics can be reduced.

The recess 58 is not necessarily provided in the armature 51.
It may not be formed at the same time. For example, it may be formed by performing an embossing process after forming the armature 51. The following advantages can be obtained when the recess 58 is formed by stamping. That is, when the recess 58 is formed by stamping, a protrusion 59 is formed on the opposite surface as shown in FIG.
When the contacts are welded as indicated by the imaginary lines in the figure, the movable contact 5 welded by the projection 59 hitting the spring piece 52a.
This is because it works so as to pull out the fixed contact 23 from the fixed contact 23.

As shown in FIG. 2, the contact spring 52 is provided with a spring piece 52a having a movable contact 57 fixed to the tip at each end thereof, and the center portion is fixed to the armature 51 so that the armature 51 is fixed.
It is attached to one. The spring piece 52a has a slit 5
6, is bent into a substantially Z-shape, and the tip is separated from the armature 51. A T-shaped hinge spring 55 protrudes from one side of the center of the contact spring 52.

The armature block 5 has a swing fulcrum 53 fitted in the recess 17 and is swingably housed in the base 11.
The hinge spring 55 is attached to the base 11 by spot welding to the common terminal 21 exposed from the bottom of the recess 14.
With the coil block 3, the magnet block 4, and the armature block 5 housed in the base 11 as described above,
When the cover 12 is fitted on the base 11, the assembly is completed.

In this polarized relay, by switching the direction of current supply to the coil 32, the magnetomotive force to be attracted by the permanent magnet 4 to one end of the armature 51 which has been separated from the side piece of the iron core 31 until then is switched. This causes the armature block 5 to swing, causing the movable contact 57 fixed to one spring piece 52a of the contact spring 52 to contact the fixed contact 23, and opening the other movable contact 57 from the fixed contact 23. Separate and switch contacts. Note that even if the energization of the coil 32 is stopped, the switching state is maintained by the magnetomotive force of the permanent magnet 4.

By the way, in this type of polarized relay in which the armature 51 of this type is swingably mounted on the permanent magnet 4,
As described above, the swing fulcrum 53 of the armature 51 is generally supported by the base 11. However, in this case, there is a problem that the accuracy of assembling the base 11 with the warp or the iron core 31 greatly affects the stroke, and the stroke is not stable.

Therefore, in order to improve this point, as shown in FIGS. 6 and 7, a support portion 41 for supporting the swing fulcrum 53 of the armature 51 may be formed on the permanent magnet 4 (for example,
The support portion 41 is formed on the permanent magnet 4 by simultaneous molding.)
In this case, since the permanent magnet 4 has a small warp, the fixed state of the armature 51 can be stabilized, and the fixed state on the iron core 31 side can be stabilized, and the assembling accuracy with the iron core 31 can be improved. You can expect, and the stroke will be stable.

FIG. 8 shows the permanent magnet 4 as a base 11
9, the position of the concave portion 42 where the swing fulcrum 53 of the supporting portion 41 is fitted is lower than the position of the bottom surface of the concave portion 17 as shown in FIG.

[0020]

As described above, according to the present invention, since the concave portions are formed in the magnetic pole surfaces on the lower surfaces of both ends of the armature, the concave portion can reduce the attractive force. Since an armature can be easily formed, an armature having a structure capable of reducing the suction force can be easily manufactured.

A contact spring having movable contacts fixed to both ends is integrally attached to the upper surface of the armature, so that the fixed portion of the movable contact projects laterally beyond both ends of the armature and corresponds to the recess. The contact spring is formed in a shape in which the portion and the tip thereof are separated from the armature, and the concave portion is formed by punching to project the surface on the contact spring side. The projecting portion can be made to have a function of releasing the contact when the contact is welded.

[Brief description of the drawings]

FIG. 1A is a perspective view of an armature according to an embodiment of the present invention. (B) is a perspective view when the above is turned upside down.

FIG. 2 (a) is a plan view of an armature block provided with the above. (B) is a sectional view taken along line AA in (a).

FIG. 3 is a partially cutaway plan view showing a case where a cover is removed.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a side view of a main part when a recess is formed by stamping.

FIG. 6 is a perspective view showing a permanent magnet provided with a support portion of an armature.

FIG. 7A is a plan view of the permanent magnet according to the first embodiment.
(B) is a sectional view taken along line CC of (a). (C) is a sectional view taken along line DD of (a).

FIG. 8 is a plan view of a polarized relay including the permanent magnet.

FIG. 9 is a sectional view taken along line EE of FIG. 8;

FIG. 10 is a perspective view of a conventional armature.

[Explanation of symbols]

 4 Permanent magnet 31 Iron core 32 Coil 51 Armature 52 Contact spring 57 Movable contact 58 Recess 59 Projection

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-218030 (JP, A) JP-A-3-134930 (JP, A) JP-A-2-87356 (JP, U) JP-A-3-18730 86548 (JP, U) Shokai Sho 62-167348 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 50/18 H01H 51/22

Claims (2)

(57) [Claims] 1. A permanent magnet is interposed between both ends of an iron core on which a coil is wound. An armature is swingably disposed on the permanent magnet, and lower surfaces of both ends of the armature are opposed to both ends of the iron core. A polarized relay, characterized in that a concave portion is formed in a magnetic pole surface on both lower surfaces of an armature. 2. A contact spring having movable contacts fixed to both ends thereof is integrally attached to an upper surface of an armature so that a fixed portion of the movable contact projects laterally beyond both ends of the armature and corresponds to the concave portion. 2. The polarized relay according to claim 1, wherein the contact spring is formed in a shape in which a portion and a tip thereof are separated from the armature, and the concave portion is formed by stamping to project a surface on the contact spring side.