JPH0561739B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention relates to a polarized relay.

[Background Art] In conventional polarized relays, a movable contact spring piece that forms a contact together with a fixed contact is arranged to overlap with the armature in the direction of movement of the armature. There was a problem that the bulk in the direction was increased and the relay became larger. In addition, with this configuration, the armature and the movable contact spring piece cannot be integrally molded at the same time, so it is necessary to connect the armature and the movable contact spring piece during assembly, which increases the number of man-hours. It was hot.

[Object of the Invention] The present invention has been made in view of the above points, and its main purpose is to provide a compact polarized relay that does not increase the bulk of the relay. Another object of the present invention is to provide a polarized relay in which an armature block is formed by integrating an armature and a movable contact spring piece, thereby facilitating assembly work.

[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 is composed of a box-shaped base 11 and a box-shaped cover 12 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 each side wall in the longitudinal direction. Each recess 1
3 are each provided with a contact piece 21, and the contact piece 2
1 is made of a conductive material and is integrally formed with a common terminal piece 22 which is exposed on the outside of the side wall in the width direction of the base 11 and projects downward. Ribs 14 are formed at each of the four inner corners of the base 11. A fixed contact plate 24 having fixed contacts 23 is provided on the rib 14, and the fixed contact plate 24 is made of a conductive material integrally with 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 formed. Notches 15 are formed in both longitudinal walls of the base 11, and a pair of coil terminal coupling pieces 26 protrudes 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 projects downward. In this way, contact piece 2
1 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,
The base 11 and each conductive material are 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 with a conductive material, and together with the box shape of the base 11, the strength is increased.

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 mounted on an iron core 31 which is substantially U-shaped and is open upward.
is wrapped, and both magnetic poles of the iron core 31 are each covered with a tsuba 33 made of an insulating material.
The tips of both magnetic poles are exposed from the circumferential surface of 3. 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 2
6 and is electrically and mechanically coupled by welding, soldering, or the like. Here, the coil terminal 34 and the coil terminal coupling piece 26 each protrude above both magnetic poles of the iron core 31,
Further, since the coil terminal coupling piece 26 is provided protrudingly within the notch 15, the coil terminal coupling piece 26 and the coil terminal 34 are exposed from the base 11, and operations such as welding or soldering of the two are not possible. This makes it easier. 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 is plate-shaped, and a groove 41 with a substantially semicircular cross section running in the width direction of the base 11 is formed in the center of the surface. The surface of the permanent magnet 4 is the base 11
It forms an inclined surface 42 which is thick at the intermediate portion in the longitudinal direction and gradually becomes thinner toward the end. Further, 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 toward one end, and in that case, monostable operation can be achieved. The magnetic poles at both ends of the permanent magnet 4 are interposed between the two legs so as to abut against 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 a difference may be provided between the two gaps in order to obtain the required magnetic characteristics.

The armature block 5 includes a flat plate-shaped armature 51 made of a magnetic material, movable contact spring pieces 52 disposed on both sides of the armature 51, and integrally molded together 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 integrally protrudes from the center portion in the longitudinal direction with a support piece 55 whose tip end is formed in a substantially T shape in the width direction. In addition, slits 56 are formed at both ends in the longitudinal direction, each opening at the tip, so that the tip of the movable contact spring piece 52 can be easily bent. A notch 57 is formed in the spring support 53 and opens at both ends of the armature 51 in the width direction. A support piece 55 is provided protruding from the inner end of this notch 57.
5 protrudes outward from the spring support 53 in the width direction of the armature 51. That is,
A movable contact spring piece 52 is fixed at the center in the longitudinal direction by a spring support 53, and the support piece 5
5 protrudes from the spring support body 53, both ends of the movable contact spring piece 52 in the longitudinal direction and the support piece 55 each independently apply a spring force. This armature block 5 is constructed by fitting the protrusion 54 provided on the back surface of the armature 51 into the groove 41 of the permanent magnet 4, and fitting the support piece 55 into the recess 13 provided on the side wall of the base 11. The armature block 5 is arranged at a fixed position within the base 11, and the armature block 5 can swing freely around the support piece 55. 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 making the planar supporting piece 55 the center of swing of the armature block 5, the supporting piece 55
Since the armature block 5 can swing freely by utilizing the torsion of the armature, there is no or almost no friction between the armature block 5 and other members, and when the armature block 5 is initially moved, The starting force needed to overcome the static frictional force is reduced, and a highly sensitive polarized electromagnet can be obtained. On the other hand, since the spring force caused by the twisting of the support piece 55 acts on the armature block 5, the attractive force acting on the armature 51 can be adjusted by the spring force caused by the twisting of the armature 51, as shown in FIG. Further, the contact pressure between the fixed contact 23 and the movable contact spring piece 52 can be adjusted by the spring force of the movable contact spring piece 52. 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 power 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, the contact points for both fixed contacts 23 can be adjusted. It is possible to adjust the pressure independently of each other, making it easy to adjust the contact pressure. Further, since the movable contact spring pieces 52 are disposed on substantially the same plane as the armature 51 on both sides of the armature 51 in the width direction, the overall 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 only on either side.

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 within the base 11. As shown in FIG. 2, the four partition pieces 16 protruding from the inner bottom surface of the cover 12 are connected to the armature 51 when the cover 12 is fitted onto the base 11.
and the movable contact spring piece 52,
An insulating partition piece 16 is interposed between the armature 51 and the movable contact spring piece 52, so that a large insulation distance can be maintained between the two.

In the above example, the groove 41 of the permanent magnet 4 has a substantially semicircular cross section, but the cross section may be substantially V-shaped and open upward. In this case, 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. Further, the permanent magnet 4 and the armature 51 may be fitted in a state where they are always in contact with each other, or may be fitted only when external vibrations or shocks are applied.

With the above configuration, if the coil 32 is energized,
Depending on the direction of magnetization, one end of the armature 51 in the longitudinal direction is attracted to one of the magnetic poles of the iron core 31, and the armature block 5 swings, causing the rotation of the iron core 31 → armature 51 → permanent magnet 4 → iron core. 31 closed magnetic circuits are formed, and one longitudinal end of the movable contact spring piece 52 contacts the corresponding fixed contact 23. When the coil 32 is de-energized in this state, the magnetic force of the permanent magnet 4 maintains the closed magnetic path as it is, and the armature 5
1 is maintained in contact with one side of the iron core 31. Furthermore, if the current direction to the coil 32 is reversed, the armature 51 is attracted to the other magnetic pole of the iron core 31, and the other longitudinal end of the movable contact spring piece 52 is connected to the corresponding fixed contact 23. Contact. 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 an armature in which the armature block is arranged to be swingable with respect to the iron core and has a flat plate shape, and an armature block arranged on the side of the armature. Since the armature is provided with a movable contact spring piece, the armature does not become bulky in the direction of movement, and the relay can be made flat as a whole, which has the advantage of leading to miniaturization of the relay. Further, a movable contact spring piece is disposed on the side of the armature, and a spring support body is interposed between the armature and the movable contact spring piece to integrally connect them, thereby forming an armature block. Because of this, it is possible to integrally mold the armature and the movable contact spring piece at the same time, and the armature and the movable contact spring can be handled as an integrated armature block, which has the advantage of simplifying assembly work. It has. Further, a support piece made of an elastic material is provided on the armature block and protrudes to the side of the armature through a spring support, and this support piece is provided integrally with the movable contact spring piece, and the tip of the support piece is attached to the base. Although the armature block is fixed, the terminal piece provided on the base and the movable contact spring piece are electrically connected via the support piece, so the support piece that functions as the swing axis of the armature block is attached to the base. This also serves as a conductive part for electrically connecting the movable contact spring piece to the provided terminal piece, which has the advantage of leading to a reduction in the number of component parts.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a partially omitted plan view of the same as above with the cover removed, Figure 3 is a sectional view of the same as above, Figure 4 is a perspective view of the bottom side showing the armature block used in the same as above, and Figure 5 is It is an operation explanatory diagram same as the above. 3 is a coil block, 5 is an armature block, 1
1 is a base, 22 is a common terminal piece, 23 is a fixed contact, 31 is an iron core, 32 is a coil, 51 is an armature,
52 is a movable contact spring piece; 53 is a spring support; 55
is the supporting piece.

Claims (1)

[Claims] 1 A coil block in which a coil is wound around an iron core and fixed to a base, a magnet piece that is attached to the iron core and magnetizes both magnetic poles of the iron core to the same polarity, and a middle part that is pivotally supported by the magnet piece. A plate-shaped armature is magnetized to have a different polarity from both magnetic poles of the iron core, and each end faces each end of the iron core.A support piece is attached to the side of the armature via a spring support made of insulating material. An armature block is provided, in which the tip of the support piece is fixed to the base and the armature is swingable relative to the iron core.
A movable contact spring piece disposed on the side of the armature and integrally connected to the armature via a spring support is provided on the armature block, and the movable contact spring piece moves into and out of contact as the armature swings. A fixed contact is provided on the base, and a support piece is made of an elastic material to apply a return force when the armature swings.The support piece is also provided integrally with a movable contact spring piece, so that the support piece is made of an elastic material and is movable with the terminal piece provided on the base. A polarized relay characterized in that a contact spring piece is electrically connected to the contact spring piece via a support piece.