JPH0243077Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a latching relay in which an armature is angularly displaced within a coil frame to open and close contacts.

BACKGROUND ART A conventional four-gap polarized magnetic circuit in which an armature is angularly displaced within a coil frame is efficient and is used as a polarized relay. 10th
The figure is a sectional view of the vicinity of an armature used in a conventional polarized relay, and FIG. 11 is a perspective view thereof. Amitya 1 is roughly formed in an H-shape,
It includes a pair of extension parts 2 and 3 and a support part 4 that connects the extension parts 2 and 3. This armature 1 is angularly displaceable around the axis of the support portion 4. A longitudinal elastic member 5 extending perpendicularly to the longitudinal direction of the support portion 4 is caulked to the support portion 4 . Roughly U-shaped yokes 9 and 10 are arranged on both sides of the armature 1. The yoke 9 has a pair of legs 9a and 9b.
and a connecting portion 9c that connects the leg portions 9a and 9b. The other yoke 10 also has a similar configuration to the yoke 9, and has a pair of legs 10a, 1
0b and a connecting portion 10c. This leg 9a, 1
0a faces each one end 2a, 3a of the extension parts 2, 3, and the leg parts 9b, 10b face the other end 2b, 3b of the extension parts 2, 3. The legs 9a and 9b of the yoke 9 are magnetized to S poles by a permanent magnet (not shown),
Further, the leg portions 10a and 10b of the yoke 10 are magnetized to the north pole.

Electromagnetic coil (not shown) around Amachia 1
When the armature 1 is energized, the armature 1 is angularly displaced around the axis of the support portion 4, and the movable contact 7 comes into contact with the fixed contact 6 as shown in FIG. This causes the load current to flow in the direction shown in FIG. 11 or in the direction shown in FIG. 112. The armature 1 is excited by this load current. For example, when the load current flows in the direction shown in FIG. 11, magnetic fluxes M1 and M2 flow in the direction of the arrow.
The end 2a of the extending portion 2 is magnetized to the north pole, and the other end 2a is magnetized to the north pole.
b is magnetized to the north pole. Also, one end portion 3 of the extension portion 3
a is magnetized to the south pole, and the other end 3b is magnetized to the south pole. As a result, a magnetic attraction force is generated between the end 2a of the extending portion 2 of the armature 1 and the end 3b of the extending portion 3, and a magnetic attraction force is generated between the end 2b of the extending portion 2 and the end 3b of the extending portion 3. A magnetic repulsion force is generated between the end portion 3a and the end portion 3a. If the load current is quite large, for example 20A or more, the magnetic attractive force will be magnetically saturated, but the repulsive force will increase based on the strength of the load current, so that the end of the extension portion 2 At the portion 2b and the end portion 3a of the extension portion 3, the suction force to the yokes 9, 10 is reduced, and therefore the holding force is reduced.
In addition, vibration resistance and impact resistance properties are reduced. In the worst case, the armature 1 and the yokes 9 and 10 will be separated, and furthermore, the contacts 6 and 7 will be separated. When the load current flows in the opposite direction as shown in FIG.
A magnetic adsorption force is generated between a and 2b, and the holding force between the armature 1 and the yokes 2 and 3 is reduced in the same manner as described above.

Purpose The purpose of the present invention is to provide a latching relay that solves the above-mentioned technical problems, prevents the retention force between the armature and yoke from decreasing due to load current, and maintains vibration and shock resistance characteristics. be.

Embodiment FIG. 1 is an exploded perspective view of a latching relay according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the latching relay, and FIG. 3 is a longitudinal sectional view of the latching relay. Referring to these drawings, the latching relay 20 basically includes a coil frame 21,
A pair of yokes 22, 23, a permanent magnet piece 24,
The electromagnetic coil 25 is wound around a coil frame 21. An armature 26 and a longitudinal elastic member 27 are housed within the coil frame 21. The armature 26 is attached to a midway position in the longitudinal direction of the longitudinal elastic member material 27. The yoke 22 is formed roughly in a U-shape, and includes a pair of legs 22a, 22b;
and a connecting portion 22c that connects the two. York 23
The yoke 22 also has a similar configuration to the yoke 22, and includes a pair of leg portions 23a, 23b and a connecting portion 23c. A permanent magnet piece 24 is attached to the connecting portions 22c and 23c. This permanent magnet piece 24 has connection parts 22c, 23
It is magnetized in a direction perpendicular to the longitudinal direction of c. That is, the side facing the connecting portion 22c is the N pole, and the side facing the connecting portion 23
The side facing c is magnetized to the S pole. Therefore, the legs 22a and 22b are magnetized to the north pole, and the legs 23
a and 23b are magnetized to S poles. Electromagnetic coil 25
When energized, the magnetic fluxes are superimposed and attenuated in the gaps P1, P2, P3, and P4, so that the armature 26 is angularly displaced and the contacts are opened and closed.

FIG. 4 shows the armature 26 and the longitudinal elastic member 27.
FIG. 5 is an exploded perspective view thereof, and FIG. 6 is a sectional view taken along the cutting plane line - in FIG. 4. The armature 26 is formed roughly in an H-shape, and includes a pair of upper and lower extending portions 28 and 29, and a support portion 30 continuous to the extending portions 28 and 29. The longitudinal elastic member 27 has a notch 31 extending in the longitudinal direction.
are formed, thereby forming a first movable plate 32a and a second movable plate 32b. First movable plate 32
A substantially U-shaped bent portion 33a is formed in the second movable plate 32b, and a substantially U-shaped bent portion 33b is formed in the second movable plate 32b. Movable contacts 35a and 35b capable of contacting and separating from the fixed contact 34 are provided at the free ends of the first movable plate 32a and the second movable plate 32b. The other ends of the movable plates 32a and 32b are connected to the common terminal 3.
6. The bent portion 33a and the bent portion 33
The movable plates 32a, 32b are integrated with the armature 26 by welding or caulking with the support portion 30 of the armature 26 sandwiched between the movable plates 32a and 32b.

When the electromagnetic coil 25 is excited and the armature 26 is angularly displaced around the axis of its support portion 29, and the movable contacts 35a and 35b come into contact with the fixed contact 34,
A load current flows as shown in FIG. At this time, each movable plate 32a, 32b has 1/1.
current flows. Therefore, due to the current 1/2 flowing through the first movable plate 32a, reference mark A in FIG.
A magnetic flux represented by flows into the support portion 29. Also the second
Due to the current 1/2 flowing through the movable plate 32b,
A magnetic flux indicated by reference numeral B in FIG. 4 flows. These magnetic fluxes A and B cancel each other out as shown in FIG. It is possible to prevent the holding force between the armature 26 and the yokes 22, 23 from decreasing as much as possible due to the magnetic flux generated in the armature 26 due to the current.

Furthermore, in this embodiment, the contacts of the longitudinal elastic member can be configured as twin contacts without increasing the number of parts, and therefore reliability can be improved.

FIG. 7 is a perspective view of another embodiment of the Amachiya according to the present invention, and FIG. 8 is an exploded perspective view thereof.
FIG. 9 is a sectional view taken along the section line - in FIG. 7. This embodiment is similar to the previous embodiment and corresponding parts are provided with the same reference numerals. It should be noted that in this embodiment, the longitudinal elastic member 27 includes a first movable plate 40 and a second movable plate 41. The first movable plate 40 is formed with an inverted U-shaped bent portion 40a.
A movable contact 35 is provided at the end of the first movable plate 40 . The second movable plate 41 has a U-shaped bent portion 41a.
is formed. The width d1 of the first movable plate 40 is the same as the width d2 of the second movable plate 41. When attaching the movable plates 40 and 41 to the armature 26, bends 4 are formed on both sides of the support section 30 of the armature 26.
0a and the bent portion 41a are in contact with each other, the pin 4
2, 43, and 44. Note that instead of caulking the pins 42 to 44, the movable plates 40, 41 and the armature 26 may be integrated by welding. With such a configuration, 1/2 parts are also provided on both sides of the support part 30.
The load currents 2 and 2 flow respectively, and accordingly, as described above, the magnetic fluxes A and B caused by the load currents cancel each other out, and the excitation of the armature 26 due to the load currents can be reduced as much as possible.

Effects of the invention As described above, according to the invention, it is possible to prevent as much as possible the reduction in the attraction force between the armature and the yoke due to the load current, and it is possible to maintain the holding force between the armature and the yoke. Become. Further, it is possible to prevent deterioration of vibration resistance and impact resistance characteristics, and furthermore, it is possible to prevent separation between the armature and the yoke, and to reduce contact separation as much as possible.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a latching relay 20 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the latching relay 20 shown in FIG. FIG. 4 is a perspective view of an embodiment of the amachia according to the present invention, FIG. 5 is an exploded perspective view thereof,
6 is a sectional view taken from the cutting plane line - of FIG. 4, FIG. 7 is a perspective view of another embodiment of the amatea according to the present invention, and FIG. 8 is an exploded perspective view of the amatea shown in FIG. Figure 9 is a cross-sectional view taken from the cutting plane line - in Figure 7, Figure 10 is a cross-sectional view of a conventional armature, and Figure 11 explains the operating state of a conventional armature when a load current flows. This is a diagram for 22, 23... Yoke, 24... Permanent magnet piece,
25... Electromagnetic coil, 26... Amateur, 28,
29... Extension part, 30... Support part, 32a, 32
b, 40, 41...Movable plate, 33a, 33b, 4
0a, 41a...Bending portion, 34...Fixed contact, 3
5, 355a, 35b...Movable contact, 36...Common terminal.

Claims (1)

[Claims for Utility Model Registration] A longitudinal elastic member having one end provided with a movable contact capable of contacting and separating from a fixed contact, and the other end attached to a fixed position; and a longitudinal elastic member located midway in the longitudinal direction of the longitudinal elastic member. an armature that is attached and has a support part that intersects in the longitudinal direction of the longitudinal elastic member and an extension part that is continuous with both ends of the support part and extends generally in the longitudinal direction of the longitudinal member with respect to the support part; and an end of the extension part. the longitudinal elastic member includes a yoke having two pairs of magnetic poles for angularly displacing the armature around the support portion to achieve two stable angular displacement states; A latching relay characterized by having a structure in which it branches out and surrounds each side of the part by approximately half a circumference.