JP2529889Y2 - relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a seesaw-balanced amateur type polarized relay.

[Prior Art] This type of polarized relay has a coil block in which a coil is wound around a substantially U-shaped iron core, and both ends opposed to the magnetic poles interposed between the magnetic poles of the iron core. A permanent magnet that is magnetized to the same pole and the center between the two magnetic poles is magnetized to different polarities, and an armature that is arranged on this permanent magnet so as to swing freely and has both ends facing both magnetic poles of the iron core, respectively. The contact is opened and closed by swinging the armature.

[Problem to be Solved by the Invention] By the way, in the seesaw-balanced armature type polarized relay having the above-described configuration, since the entire surface on one side of the permanent magnet faces the armature, how efficiently the magnetic flux leaking from the permanent magnet is picked up. This is the point to improve the magnetic efficiency. Therefore, in a conventional relay of this type, the gap between the permanent magnet and the armature is reduced by forming the upper surface of the permanent magnet in a chevron shape so that the armature can efficiently pick up magnetic flux leakage from the permanent magnet. I was

However, there is a problem that it is very difficult to form a permanent magnet in the above-described shape, and it is also difficult to secure dimensional accuracy.

The present invention has been made in view of the above points, and an object of the present invention is to provide a relay having good magnetic efficiency and easy manufacturing.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, the lower surfaces of both ends of the armature that is attracted to the magnetic pole surface of the iron core when the coil is excited are respectively formed on the surface along the upper surface of the permanent magnet when attracted. It is done. [Action] As described above, the present invention forms the lower surfaces of both ends of the armature that is attracted to the magnetic pole surface of the iron core when the coil is excited, on the surfaces along the upper surface of the permanent magnet when attracted, respectively. The gap between the armature and the opposing surface of the permanent magnet can be reduced so that the armature can efficiently pick up the magnetic flux leaking from the permanent magnet. By processing the surface to be picked up, processing can be easily performed.

FIG. 1 to FIG. 4 show an embodiment of the present invention. The casing 1 of the relay according to the present embodiment includes a box-shaped base 11 having an open upper surface, and a cover 12 having a box-like shape having an open lower surface and being fitted around the base 11 so as to be fitted therein. The block 3, the permanent magnet 4, and the armature block 5 are housed therein.

The base 11 is made of an insulating material such as a synthetic resin, and has a partition 13 protruding from the bottom surface to divide the center of the inside into two in the width direction. A coil is provided in one storage space separated by the partition 13. The block 3 is housed, and the permanent magnet 4 and the armature block 5 are housed in the other storage space. The base 11 has a common terminal 21 connected to a contact spring 52 integrally formed with the armature 51, a fixed terminal 22 to which a fixed contact 23 is fixed, and a coil.
The three coil terminals 24 to which 32 is connected are insert-molded, and the terminals 21 and 22 project downward along the outer surface of the side wall on the side where the permanent magnet 4 is housed. The upper end of the common terminal 21 embedded in the base 11 is exposed from the bottom surface of the formed recess 14, and the base is formed from the bottom surface of the recess 15 formed on the upper side of the storage space side of the permanent magnet 4 on both end walls. An upper end portion of a fixed terminal 22 embedded in the inside 11 is exposed, and a fixed contact 23 is fixed to an exposed portion of the fixed terminal 22. The coil terminals 24 also protrude downward along the outer surface of the side wall on which the coil block 3 is housed, and a total of five recesses 16 are formed on the side wall and on the upper end wall of the coil block 3 on the housing space side. Formed and central recess 16 in the side wall
The upper ends of the coil terminals 24 at the center are exposed, and the upper ends of the coil terminals 24 on both sides are exposed from the recesses 16 at both end walls. A recess 17 is formed on the inner surface below the recess 14 on the side wall of the base 11 on the storage space side of the permanent magnet 4 and on the surface of the partition 13 facing the side wall.

The coil block 3 includes a substantially U-shaped iron core 31, a coil bobbin 33 in which a central portion of the iron core 31 is penetrated such that both side pieces of the iron core 31 project sideways, and a coil 32 wound around the coil bobbin 33. Consists of Here, the coil winding part of the coil bobbin 33 is divided into two parts by a central flange 33a, and the coil winding part divided into two is wound with the coil 32 in reverse winding. Also,
From the back surface inside the flange 33b at both ends of the center flange 33a and the coil bobbin 33, connecting pieces 34 for connecting the ends of the coil 32 are respectively protruded, and a flange 33b is provided at the other end of each connecting piece 34 of the flange 33b. It protrudes from both ends through the inside. When the coil block 3 is stored in the base 11, the tip of the side piece of the iron core 31 fits in the storage space on the permanent magnet 4 side, and the connection piece 34 and the projecting piece
35 fit into the respective recesses 16 and are connected to the respective terminals 24 by spot welding or the like.

Here, a step 36 is formed at an intermediate portion between both side pieces of the iron core 31 so as to bring the tips of the both side pieces closer to the base 11.

The permanent magnet 4 has a flat plate shape, and both ends facing the magnetic poles are magnetized to the same polarity and the middle portion is magnetized to a different polarity. And inserted into the base 11.

The armature block 5 includes a plate-shaped armature 51 made of a magnetic material.
And a conductive contact spring 52 fixed to the armature 51 and a contact spring 52. The lower surface of both ends of the armature 51 is a tapered surface 51a inclined obliquely upward. From the center of both side surfaces, the armature 51 is fitted into one side wall of the base 11 and the recess 17 formed in the partition wall 13, so that the armature 51 can swing. A swing fulcrum 53 for supporting the projection is provided. The contact spring 52 is divided into two parts by a slit 56, and is bent substantially in a Z-shape at the center to form a spring piece 52a having a movable contact 57 fixed at the tip. T-shaped hinge spring protruding from one side to the side
55 is integrally formed. The armature block 5 is swingably housed in the base 11 by fitting a swing fulcrum 53 into the recess 17 so as to house the hinge spring 55 in the recess 14. At this time, the hinge spring 55 is spot-welded to the common terminal 21 exposed from the bottom of the recess 14. By the way, positioning projections 18 are formed on both sides of the inner surface of the bottom of the recess 14 of the base 11 so that the armature block 5 can be positioned and mounted in a fixed position. Is set at a predetermined mounting position of the armature block 5. Thus, the armature block 5
Is arranged at a predetermined position, the armature block 5 and the base 11
It is possible to maintain an appropriate distance from the armature block 5 even if the relay is used in a poor environment where heat or moisture is applied and the synthetic resin casing 1 is distorted.
Does not contact the base 11 and cause a malfunction. In addition, in the above case, the distance between the armature block 5 on the hinge spring 55 side and the base 11 remains unchanged even when the base 11 is distorted. Therefore, the distance between the armature block 5 and the hinge spring 55 side is reduced. Alternatively, the distance between the partition 13 and the opposite side may be increased so that the distortion can be absorbed by the partition 13 when the base 11 is distorted.

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 relay, when one of the coils 32 is selectively energized, the armature 51 is switched according to the direction of magnetization of the iron core 31.
Is attracted to one side piece of the iron core 31, and the armature block 5 swings, whereby the armature 51 is attracted to the side piece of the iron core 31. At this time, the movable contact 57 fixed to one spring piece 52a of the contact spring 52 comes into contact with the fixed contact 23. When energization of the coil 32 is stopped in this state, the closed magnetic circuit is maintained as it is by the magnetic force of the permanent magnet 4, and the armature 51 is
The state of contact with one of the 31 is maintained. When the other coil 32 is energized, the armature 51 is attracted to the other side piece of the iron core 31, and the movable contact 57 fixed to the other spring piece 52a contacts the fixed contact 23. Even in this state, after the energization is stopped, the state is maintained as it is, so-called bistable operation is performed.

By the way, in the case of the present embodiment, since the tapered surface 51a is inclined obliquely upward at both ends of the armature 51, the gap with the upper surface of the permanent magnet 4 can be reduced as shown in the enlarged view of FIG. . That is, as shown in FIG. 5, unless the lower surfaces of both ends of the armature 51 are tapered, the gap between the permanent magnet 4 is widened, and the magnetic efficiency is deteriorated. However, in this embodiment, since the tapered surface 51a is used, the gap with the permanent magnet 4 can be reduced as shown in FIG. 2, so that the magnetic flux leaking from the permanent magnet 4 can be efficiently picked up. Efficiency is improved. FIG. 4 shows a suction force characteristic comparing the two. Moreover, in this case, the surface contact of the armature 51 with the iron core 31 is also improved. Moreover, since the armature 51 is processed to improve the magnetic efficiency, the processing is easy and the dimensional accuracy can be secured.
Manufacturing becomes easy.

Also, since a step 36 is formed in the iron core 31,
While increasing the number of turns of the coil 32 by separating the mounting portion of the coil bobbin 33 from the base 11 in 31, the magnetic pole side portion where the armature 51 is arranged on the upper side is brought closer to the base 11, so that the armature 51 The height dimension up to the upper surface can be reduced. That is, a relay having a small height as a whole can be provided.

[Effects of the Invention] As described above, in the present invention, the lower surfaces on both sides of the armature that is attracted to the magnetic pole surface of the iron core when the coil is excited are formed on the surfaces along the upper surface of the permanent magnet when attracted, respectively. The gap between the magnet and the permanent magnet is reduced, and the armature can efficiently pick up the magnetic flux leaking from the permanent magnet, so that the magnetic efficiency is good and the armature is machined, so the machining is easy and the dimensional accuracy is high. Easy to secure and easy to manufacture.

In addition, a step is formed at the portion between the magnetic pole and the intermediate portion where the core coil is wound along the base, so that the magnetic pole side is closer to the base. By bringing the side part closer to the base,
There is an advantage that the height from the base to the upper surface of the armature can be reduced, and a relay having a small height as a whole can be provided. In addition, since the winding portion of the coil in the iron core is separated from the base by this configuration, the number of turns of the coil can be relatively large, and the effect of increasing the attractive force of the armature and further improving the sensitivity can be obtained. .

[Brief description of the drawings]

FIG. 1A is a plan view of a part of an embodiment of the present invention, FIG. 1B is a sectional view taken along a line AB in FIG. 1A, and FIG. (a) is a sectional view taken along line CD, (d) is a sectional view taken along line EF of (a), (e) is a sectional view taken along line GH of (a), and FIG. FIG. 3 is an enlarged cross-sectional view of a main part of the above, FIG. 3 is an exploded perspective view of the same, FIG. 4 is an explanatory view showing a suction force characteristic of the above, and FIG. It is an expanded sectional view of an important section of a relay provided with an armature. 4 is a permanent magnet, 31 is an iron core, 32 is a coil, 36 is a step, 51 is an armature, and 51a is a tapered surface.

Claims (1)

(57) [Scope of request for utility model registration] 1. An iron core arranged along a base and having a coil wound around an intermediate portion, a permanent magnet interposed between magnetic poles at both ends of the iron core, and both ends slidably disposed on the permanent magnet. The armatures are provided with armatures opposed to both magnetic poles of the iron core, respectively, and the lower surfaces of both ends of the armature which are attracted to the magnetic pole surface of the iron core when the coil is excited are respectively formed on the surface along the upper surface of the permanent magnet at the time of attracting. A relay formed by forming a step near the magnetic pole side to the base at a position between the intermediate portion and the magnetic pole.