JPS61218031A - Polar 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 1] The present invention relates to a polarized relay, and more particularly to a polarized relay in which an armature is swingably disposed with its central portion as a support.

[Background Art] Conventional polarized relays have a structure in which a movable contact moves back and forth between a pair of fixed contacts arranged opposite each other, so that the movable contact contacts one of the two fixed contacts. By adjusting the spring force of the movable contact spring piece provided with the movable contact and the position of its fixed end, the contact pressure between one of the fixed and movable contacts and the contact pressure between the contacts can be adjusted. Adjusting the distance changes the contact pressure and distance between the other fixed contact and the movable contact, making it difficult to obtain appropriate contact pressure and distance between the contacts. Therefore, if you adjust the distance between the contacts by adjusting the position of the fixed contacts,
There was a disadvantage that the withstand voltage characteristics changed.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its main purpose is to have a pair of fixed contacts, and to connect one of the fixed contacts according to the position of the armature. In a polarized relay in which a fixed contact is selectively connected to a movable contact spring piece, the contact pressure and distance between each fixed contact and the movable contact spring piece can be adjusted independently for each fixed contact. The purpose of the present invention is to provide a polarized relay.

[Disclosure of the Invention 1 (Examples) Examples of the present invention will be described below based on the drawings. In the following description, a polarized relay using the polarized electromagnetic device of the present invention will be exemplified.

As shown in FIG. 1, the casing 1 has a box-shaped base 11 that is open upward, and a box-shaped base 11 that is open downward, and is fitted from above the base 11 so as to cover the outside of the side wall of the base 11. It is composed of a cover 12.

The base 11 is a molded product made of an insulating material such as synthetic resin and is formed into a substantially rectangular parallelepiped shape, and four sides 13 are formed on both sides in the width direction, with the upper and inner surfaces open at the center in the longitudinal direction. be done. A contact piece 21 faces the bottom of each of the four sides 13, and the contact piece 21 is integrally formed of a conductive plate with a common terminal piece 22 that is exposed outside the middle side wall of the base 11 and projects downward. Lips 14 running vertically and having upper ends located below the upper surface of the base 11 are formed at the four inner corners of the base 11, respectively. Reply 1
A fixed contact plate 24 having a fixed contact 23 on the upper surface is overlapped on the upper surface of 4, and the fixed contact plate 24 has a fixed terminal piece 25 that is exposed on the outside of the side wall in the width direction of the base 11 and protrudes downward. It is integrally formed with a conductive plate. Notches 15 are formed in both longitudinal walls of the base 11 at the center in the middle direction, and are open upward and to the front and back sides of the c/* walls, respectively. A pair of coil terminal coupling pieces 26 are provided to protrude upward.

The coil layer coupling piece 26 is integrally formed of a conductive plate with a coil terminal piece 27 that is exposed on the outside of both side walls in the width direction of the base 11 and projects downward. In this way, the contact piece 21 and the common terminal piece 22, the fixed contact plate 24 and the fixed terminal piece 25, and the coil terminal coupling piece 26 and the coil terminal piece 27 are each formed integrally with a conductive plate, and the base 11 and each conductive It is integrated with the plate by insert molding. The conductive plate is routed within the side wall of the base 11, so that the conductive plate is disposed within almost the entire side wall of the base 11.

Therefore, the side wall of the base 11 is reinforced by the conductive plate, which increases the strength of the base 11 due to its box shape.

Like the base 11, the cover 12 is a molded product made of an insulating material such as synthetic resin and is formed into a substantially rectangular parallelepiped shape, and has four partition pieces 16 projecting downward from the inner peripheral surface of the earthen wall. ing. The partition piece 16 is formed along the longitudinal direction of the cover 12.

A coil block 3, a magnet piece 4, and an armature block 5 are disposed within a casing 1 formed by a base 11 and a cover 12.

As shown in Figure @3, the coil block 3 has a substantially U-shaped iron core 31 that is open upward, and a coil 32 is wound around the horizontal pieces, and each leg piece of the iron core 31 is made of an insulating material. The legs are covered with a flange 33, and the tips of the legs are exposed from a part of the circumference of the flange 33. A pair of coil terminals 34 connected to the coil 32 are provided corresponding to each collar 33, and are bent so as to protrude upward from the upper end of the collar 33 and come into contact with the coil terminal coupling piece 26. With the coil block 3 housed in the base 11, the coil terminal 34 and the coil terminal coupling piece 26 are electrically and mechanically coupled by welding, soldering, or the like.

Here, since the coil terminal 34 and the coil terminal coupling piece 26 each protrude upwardly from the upper end of the leg piece of the iron core 31, and the coil terminal coupling piece 26 is provided to protrude into the notch 15, Coil terminal coupling piece 26 and coil terminal 34
and are exposed from the base 11, making it easy to weld or solder the two together. The magnet pieces 4 are interposed between the exposed portions of the legs of the iron core 31 so that their magnetic poles are in contact with each other.

The magnet piece 4 has a plate shape, and a groove 41 having a substantially semicircular cross section and running in the width direction of the base 11 is formed in the center of the upper surface.

The upper surface of the magnet piece 4 is an inclined surface 42 that is thickest at the center in the longitudinal direction of the base 11 and is tapered so that the thickness gradually decreases toward the ends. Further, both ends of the magnet piece 4 in the longitudinal direction of the base 11 are magnetized with the same polarity, and the center part is magnetized with different magnetic poles. In other words, if both ends are N poles, the center is S
It is magnetized so that it becomes a pole.

The magnetic poles at both ends are the iron core 3 of the coil block 3.
It is interposed between both legs in such a way that it abuts the inner surface of each leg of the first leg.

The armature block 5 includes an armature 51 made of a magnetic material having a substantially rectangular flat plate shape, and movable contact spring pieces disposed on both sides of the armature 51 in substantially the same plane as the armature 51. 52, and a spring support 53 which is a molded article of an insulating material such as synthetic resin and is integrally molded with the armature 51 and the movable contact spring 52. Armature 5
As shown in FIG. 4, the lower surface of the armature 51 is formed with a protrusion 54 having a substantially semicircular cross section and extending in the width direction of the armature 51.

The movable contact spring piece 52 is an elongated electrically conductive leaf spring,
In the center part in the longitudinal direction, the tip part in the width direction is I! T
A support piece 55 formed in a letter shape is integrally provided in a protruding manner.

In addition, slits 56 are formed at both ends in the longitudinal direction, each having a tip opening, so that the tip of the movable contact spring piece 52 can easily bend.

A notch 57 is formed in the spring support 53 and opens at both edges of the armature 51 in the width direction. A support piece 55 is provided to protrude from the inner end of the second notch 57, and a tip end of the support piece 55 protrudes outward from the spring support body 53 in the middle direction of the armature 51. That is, since the movable contact spring piece 52 is fixed by the spring support 53 at the center in the longitudinal direction, and the support piece 55 is provided protruding from the spring support 53, the movable contact spring piece 52 is fixed in the longitudinal direction. Spring force is applied to both ends of the support piece 55 and the support piece 55 independently. The second armature block 5 has a protrusion 54 provided on the lower surface of the armature 51 accommodated in the concave groove 41 of the magnet piece 4, and a supporting piece 55 provided on the side wall of the base 11.
The armature block 5 is arranged at a fixed position in the base 11 by fitting the armature block 5 into the supporting piece 55.
It can swing freely around the axis. In this way, since the support piece 55 integrally formed with the movable contact spring piece 52 supports the armature block 5, the movable contact spring piece 52 serves both as a conductive part and a support part. This leads to a reduction in the number of component parts. *In addition, by using the planar support piece 55 as the rotating wheel of the armature block 5,
As the armature block 5 swings, the support piece 55 is twisted, and a spring force against this twist acts on the armature block 5. As shown in FIG.
The attractive force acting on the armature 51 can be adjusted by the spring force caused by the torsion of the movable contact spring piece 52, and the contact pressure between the fixed contact 23, the movable contact, and the α spring piece 52 can be adjusted by the spring force of the movable contact spring piece 52. can be adjusted.

As a result, the contact pressure can be adjusted by adjusting the shape and dimensions of both ends in the longitudinal direction of the movable contact spring piece 52, and the suction force can be adjusted by adjusting the shape and dimensions of the support piece 55. The pressure and suction force can be adjusted separately and independently. Furthermore, since the movable contact spring piece 52 has independent spring forces applied to both ends in the longitudinal direction, the movable contact spring piece 52
By setting the shape and dimensions of both ends to 1IIn, it is possible to independently adjust the contact and α pressures to both fixed contacts 23, making it easy to adjust the contact pressure.

Further, since the movable contact spring pieces 52 are disposed on both sides of the armature 51 in the width direction on substantially the same plane as the armature 51, the overall thickness in the vertical direction can be reduced.

As described above, the cover 12 is fitted onto the base 11 with the coil block 3, magnet piece 4, and armature block 5 housed in the base 11.

The four partition pieces 16 protruding from the inner peripheral surface of the cover 12 are
As shown in FIG. 2, the cover 12 is fitted onto the base 11 and inserted into the gap between the armature 51 and the movable contact spring piece 52.
By interposing an insulating partition piece 16 between the two, a large insulation gap can be obtained between the two.

In the above example, the recessed groove 41 of the magnet piece 4 has a substantially semicircular cross section, but the cross section may also be a substantially square square shape that is open upward. In this case, the protrusion 54 formed on the armature 51 may have a thin blade shape.

With the above configuration, when the coil 32 is energized, one end of the armature 51 in the longitudinal direction is attracted to one leg of the iron core 31 depending on the direction of magnetization, and the armature block 5 swings. A closed magnetic path of core 31→armature 51→magnet piece 4→iron core 31 is formed, and one longitudinal end of movable contact spring piece 52 contacts the corresponding fixed wall α23. When the current to the coil 32 is stopped in this state, the m magnetic path is maintained as it is due to the magnetic force of the magnet piece 4, and the state in which the armature 51 is in contact with one of the iron cores 31 is maintained. Also,
If the current direction to the coil 32 is reversed, the armature 51
is attracted to the other leg piece of iron g31, and the movable contact spring piece 5
The other longitudinal end of 2 contacts the corresponding fixed contact 23 . Even in this state, the state is maintained after the current supply is stopped, and so-called bistable operation can be performed.

[Effects of the Invention] As described above, in the present invention, movable contact spring pieces that are long in the direction of connecting the magnetic poles of the iron core to the armature are connected via a spring support, and the spring support extends in the longitudinal direction of the movable contact spring pieces. The central part of the movable contact spring piece is fixed, and both ends of the movable contact spring piece are divided into a pair of independent spring pieces, and fixed contacts are provided at fixed positions on the casing, respectively, corresponding to both ends of the movable contact spring piece. Therefore, the contact pressure and contact distance between each fixed contact and the movable contact spring piece can be adjusted independently for each fixed contact, and the optimal contact pressure and contact distance can be obtained for each fixed contact. It has the advantage of being able to

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view showing an embodiment of the present invention; Figure 2 is a partially omitted plan view of the same with the cover removed; Figure 3 is a sectional view of the same; Figure 4 is the same as the above; FIG. 5 is a bottom #IF view showing the armature block to be used, and is an explanatory diagram of the same operation as above. 1 is a casing, 3 is a coil block, 4 is a magnet piece, 5
is the armature block, 11 is the base, 12 is the cover, 13
14 is a recess, 15 is a notch, 16 is a partition piece, 2
1 is a contact piece, 22 is a common terminal piece, 23 is a fixed contact, 24
is a fixed terminal board, 25 is a fixed terminal piece, 26 is a coil terminal coupling piece, 27 is a coil terminal piece, 31 is an iron core, 32 is a coil, 33 is a collar, 34 is a coil terminal, 41 is! ! I groove, 42
51 is an armature; 52 is a movable contact spring piece; 53
54 is a protrusion, 55 is a support piece, 56 is a slit, and 57 is a notch. Agent Patent Attorney Stone 1) Chief Figure 7 2j! 3 Figure 1! 4 Figure 4 Procedural amendment, official document (spontaneous) June 1985 258 1. Indication of the case 1985 Patent Application No. 60089 2. Name of the invention Polar relay 3. Person making the amendment Related Patent Applicant Address 1048 Kadoma, Kadoma City, Osaka Name (58
3) Matsushita Electric Works Co., Ltd. Representative Sadao Fujii 4, agent postal code 530 5, date of amendment order Invention details 1, name of invention Polarized relay 2, patent claim 111I! I (1) A coil block in which a 1L coil is wound,
Between the I pole of the iron core, both J1 parts corresponding to the magnetic poles are magnetized to the same polarity, and between the two magnetic poles, the 6tl tip is magnetized to the 1RJ% pole, and both ends are the iron cores. The insect AIL rainbow arrests as it faces both magnetic poles. 131st place "37h" Shube-Archive block and Nono" 1±
+Polarized relay. 3. Detailed Description of the Invention [Technical Field J The present invention relates to a polarized relay. [Background Art J] Conventional polarized relays have a structure in which the movable contact moves back and forth between a pair of fixed contacts arranged opposite each other, so that the movable contact contacts one of the fixed contacts. Therefore, by adjusting the spring force of the movable contact spring piece provided with the movable t&point and the position of its fixed end, the contact pressure and the contact point between one of the fixed contacts and the movable contact can be adjusted. Adjusting the contact distance changes the contact pressure and contact distance between the other fixed liquid, α, and the movable contact, making it difficult to obtain appropriate contact pressure and contact distance. Therefore, when the distance between the contacts is adjusted by adjusting the position of the fixed contacts, there is a problem in that the withstand voltage characteristics change. [Objective of the Invention J The present invention has been made in view of the above-mentioned points, and its main purpose is to have a pair of fixed contacts, and to connect one of the fixed contacts depending on the position of the armature. In a polarized relay in which fixed contacts are selectively connected to movable contact spring pieces, 41! between each fixed contact and the movable contact spring pieces. To provide a polarized relay in which the distance between point pressure rising contacts can be adjusted independently for each fixed contact. [Disclosure of the Invention] (Examples) Examples of the present invention will be described below based on the drawings. As shown in FIG. 1, the casing 1 includes a box-shaped base 11 and a box-shaped cover 12 that is fitted over the base 11. As shown in FIG. The base 11 is a molded product made of an insulating material such as synthetic resin, and a recess 13 is formed in the center of the longitudinal direction of the base 11 on both side walls.
are formed respectively. Each recess 13 is provided with a contact piece 21, and the contact piece 21 is integrally formed of a conductive material with a common terminal piece 22 that is exposed on the outside of the inner side wall of the person 11 and projects downward. . Lips 14 are formed at the four inner corners of the base 11, respectively. The lip 14 is provided with a fixed contact plate 24 having fixed contacts 23, and the fixed contact plate 24 is made of a conductive material integrally with a fixed terminal piece 25 that is exposed outside the middle side wall of the base 11 and protrudes downward. It is formed. Notches 15 are provided on both sides of the base 11 in the longitudinal direction.
are formed, and a pair of coil terminal coupling pieces 26 are provided protruding from the bottom surface of each notch 15, respectively. The coil terminal coupling piece 26 is integrally formed of a conductive material with a coil terminal piece 27 that is exposed on the outside of both widthwise walls of the base 11 and protrudes downward. In this way, the contact piece 21 and the common terminal piece 22, the fixed contact plate 24 and the fixed terminal piece 25, and the coil terminal coupling piece 26 and the coil terminal piece 27 are each integrally formed of a conductive material, and the base 11 and each conductive The material is integrated by insert molding. The conductive material is routed within the side wall of the base 11 so that the conductive material is contained within the side wall of the base 11 over substantially the entire length thereof. Therefore, the side walls of the base 11 are reinforced by the electrically conductive material, and the strength of the base 11 is increased due to the box shape of the base 11. The cover 12 is a molded product made of an insulating material such as synthetic resin, and has four partition pieces 16 protruding from the inner bottom surface. The partition piece 16 is formed along the longitudinal direction of the cover 12. A coil block 3, a permanent magnet 4, and an armature block 5 are disposed within a casing 1 formed by a base 11 and a cover 12. As shown in FIG. 3, the coil block 3 has a coil 32 wound around a substantially U-shaped iron i31 that is open upward, and both magnetic poles of the iron core 31 are made of an insulating material. 33, and the tips of both magnetic poles are exposed from the curved surface of the flange 33. A pair of coil terminals 34 connected to the coil 32 are provided corresponding to each collar 33, and are bent so as to protrude above the collar 33 and come into contact with the coil terminal coupling piece 26. With the coil block 3 housed in the base 11, the coil terminal 34 and the coil terminal coupling piece 26 are electrically and mechanically coupled by welding, soldering, or the like. Here, since the coil terminal 34 and the coil terminal coupling piece 26 each protrude above both magnetic poles of the iron core 31, and the coil terminal coupling piece 26 is provided in a protruding manner within the notch 15, the coil terminal coupling piece 26 The piece 26 and the coil terminal 34 are exposed from the base 11, making it easy to weld or solder the two together. The permanent magnet 4 is interposed between both magnetic poles of the iron core 31 so that the magnetic poles are in contact with each other. The permanent magnet 4 has a plate shape, and a groove 41 having a substantially semicircular cross section and running toward the inside of the base 11 is formed in the center of the surface. The surface of the permanent magnet 4 is an inclined surface 42 which is thickest at the middle portion in the longitudinal direction of the base 11 and is tapered so that the thickness gradually decreases toward the ends. Furthermore, both ends of the permanent magnet 4 in the longitudinal direction of the base 11 are magnetized with the same polarity, and the middle part is magnetized with different magnetic poles. That is, if both ends are north poles, the middle part is magnetized to be south pole. However, the magnetized position of the intermediate portion may be shifted to one end portion, and in that case, monostable operation can be achieved. The magnetic poles of both MI portions of the permanent magnet 54 are interposed between the two legs so as to be in contact with the inner surface of each magnetic pole of the iron core 31 of the coil block 3. Here, a required gap may be interposed between the magnetic pole of the iron core 31 and the magnetic poles at both ends of the permanent magnet 4, and in order to obtain the required magnetic characteristics, a difference should be provided between the two gaps. Good too. . The armature block 5 includes a magnetic armature 51 formed into a flat plate, movable contact spring pieces 52 disposed on both sides of the armature 51, and integrally formed with the armature 51 and the movable contact spring pieces 52. The spring support body 53 is a molded article of an insulating material such as a synthetic resin. As shown in FIG. 4, on the back surface of the armature 51, a protrusion 54 having a substantially semicircular cross section and running in the width direction of the armature 51 is formed. The movable contact spring piece 52 is an electrically conductive plate spring, and a support piece 55 having a substantially T-shaped distal end protruding toward the middle is integrally provided at the center portion in the longitudinal direction. Furthermore, slits 56 that open the optical layer are formed at both ends in the longitudinal direction, so that the tip of the movable contact spring piece 52 is easily bent. A notch 57 that opens at the edge is formed. A support piece 55 is protruded from the inner end of this notch 57, and the tip of the support piece 55 extends outward from the spring support 53 in the middle direction of the armature 51. The movable contact spring piece 5 protrudes.
2 is fixed at the center in the longitudinal direction by a spring support 53, and the support piece 55 is provided protruding from the spring support 53. Therefore, both longitudinal ends of the movable contact spring piece 52 and the support piece 55 causes spring force to be applied independently. After this, the pole block 5 connects the protrusion 54 provided on the back surface of the armature 51 to the concave groove 4 of the permanent magnet 4.
The armature block 5 is arranged at a fixed position in the base 11 by fitting the support piece 55 into a recess 13 provided in the side wall of the base 11. As a result, it can be swung freely. In this way, the support piece 5 integrally formed with the movable contact piece 52
5 supports the armature block 5,
The movable contact spring piece 52 serves as both a conductive part and a support part, which leads to a reduction in the number of components. Further, since the armature block 5 is configured to have a planar support piece 55 as the center of swing, the armature block 5 can swing freely by utilizing the twisting of the support piece 55, so that the armature block 5 and other There is no or almost no part that causes friction between the armature block 5 and the armature block 5, and the starting force needed to overcome the static friction force is reduced when the armature block 5 first moves, making it possible to obtain a highly sensitive polarized electromagnet. It can be done. On the other hand, since the spring force due to the twist of the support piece 55 acts on the armature block 5, the attractive force acting on the armature 51 cannot be adjusted by the spring force due to the twist of the armature 51, as shown in FIG. Also, the fixed contact 23 is moved by the spring force of the movable contact spring piece 52.
The contact pressure between the movable contact spring piece 52 and the movable contact spring piece 52 can be adjusted. As a result, the contact pressure can be adjusted by adjusting the shape and dimensions of both longitudinal ends of the movable contact spring piece 52, and the suction force can be adjusted by adjusting the shape and dimensions of the support piece 55. The suction force can be adjusted separately and independently. Furthermore, since the movable contact spring piece 52 applies independent spring forces at both ends in the longitudinal direction, by adjusting the shape and dimensions of both ends of the movable contact spring piece 52, It is possible to adjust the contact pressures independently, making it easy to adjust the contact pressures. Here, the movable contact spring piece 52 is divided into two independent springs by the spring support 53, but if one is unnecessary, it may be cut. Furthermore, since the movable contact spring pieces 52 are disposed on both sides of the armature 51 in the IJ force direction, on substantially the same plane as the armature 51,
Overall, the thickness in the vertical direction can be reduced. Although the movable contact spring pieces 52 are provided on both sides of the armature 51, they may be provided on only one of them. As described above, the cover 12 is fitted onto the base 11 with the coil block 3, permanent magnet 4, and armature block 5 housed in the base 11. The four partition pieces 16 protruding from the inner bottom surface of the cover 12 are l! As shown in FIG. Due to the interposition of the insulating partition piece 16, there is no separation A1 between the two.
It is designed to allow a large ff1 separation. In the above example, the groove 41 of the permanent magnet 4 has a substantially semicircular cross section;
If the shape is acceptable, the protrusion 54 formed on the armature 51 may have a thin blade shape. Further, in addition to the above-mentioned shape, any shape may be used as long as the permanent magnet 4 and the armature 51 are fitted into each other so that the armature 51 is guided in a swinging manner. Furthermore, the permanent magnet 4 and the armature 51 may be fitted together in constant contact with each other, or may be fitted only when external vibrations or shocks are applied. With the above configuration, when the coil 32 is energized, one end of the armature 51 in the longitudinal direction is attracted to one magnetic pole of the iron core 31 according to the direction of magnetization, the armature block 5 swings, and the iron core A closed magnetic path of 31→armature 51→permanent magnet 4→iron core 31 is formed, and one end of the movable contact spring piece 52 in the longitudinal direction comes into contact with the corresponding fixed contact 23. When the current to the coil 32 is stopped in this state, the closed magnetic path is maintained by the magnetic force of the permanent magnet 4, and the state in which the armature 51 is in contact with one of the iron cores 31 is maintained. Also, if the direction of current to the coil 32 is reversed, the armature 5
1 is attracted to the other magnetic pole of the iron core 31, and after the other longitudinal end of the movable contact spring piece 52 is fixed, α23
come into contact with. Even in this state, the state is maintained after the current supply is stopped, and so-called bistable operation can be performed. [Effects of the Invention] As described above, the present invention includes a movable contact spring piece that interlocks with the armature, and a movable contact spring piece that is provided at fixed positions on the base corresponding to both ends of the movable contact spring piece and that moves as the armature swings. Since it is equipped with a fixed contact, which the movable contact spring piece moves into and out of, and a spring support that fixes the middle part of the movable contact spring piece and connects the movable contact spring piece and the armature, each fixed wall has one point. The contact pressure and distance between the contact spring and the movable contact spring piece can be adjusted independently for each fixed contact, and the advantage is that the optimum contact pressure and distance between the contacts can be obtained for each fixed contact. It has. 4. Brief description of the drawings Figure 1 is an exploded perspective view showing one embodiment of the present invention, Figure 2 is a partially omitted plan view of the same with the cover removed, Figure #3 is a sectional view of the same, FIG. 4 is a bottom perspective view showing the armature block used in the above, and FIG. 5 is an explanatory diagram of the operation of the same. 3 is a coil block, 4 is a permanent magnet, 5 is an armature block, 11 is a base, 23 is a fixed wall, α, 31 is an iron core, 3
2 is a coil, 51 is an armature, 52 is a movable contact spring piece, 5
3 is a spring support body, and 55 is a support piece.

Claims (1)

[Claims] (1) A coil block in which a coil is wound around a roughly U-shaped iron core, and a coil block that is interposed between the magnetic poles of the iron core, with both ends corresponding to the magnetic poles magnetized to the same polarity, and the center between the two magnetic poles. An armature block that has a magnet piece whose parts are magnetized with different polarities, and an armature whose end parts each face both magnetic poles of an iron core and whose center part is swingably supported by the center part of the magnet piece. In a polarized relay that is housed in a casing, a movable contact spring piece that is long in the direction of connecting the magnetic poles of the iron core is connected to the armature via a spring support, and the spring support is connected to the movable contact spring piece. The center portion in the longitudinal direction is fixed, and both ends of the movable contact spring piece are divided into a pair of independent spring pieces, and fixed contacts are provided at fixed positions on the casing, respectively, corresponding to both ends of the movable contact spring piece. A polarized relay characterized by consisting of: