JPH0316191Y2 - - 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 Conventionally, a four-gap polarized magnetic circuit in which an armature is angularly displaced within a coil frame has good efficiency and has been used as a polarized relay. FIG. 14 is a sectional view of the vicinity of an armature used in a conventional polarized relay, and FIG. 15 is a perspective view thereof.
The armature 1 is formed roughly in an H-shape and 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. This support part 4 has
A longitudinal elastic member 5 extending perpendicularly to the longitudinal direction of the support portion 4 is caulked together. Roughly U-shaped yokes 9 and 10 are arranged on both sides of the armature 1. The yoke 9 includes a pair of legs 9a and 9b, and a connecting portion 9c that connects the legs 9a and 9b. The other yoke 10 also has a similar configuration to the yoke 9, and includes a pair of leg portions 10a, 10b and a connecting portion 10c. The legs 9a, 10a face one end 2a, 3a of the extensions 2, 3, and the legs 9b, 10b face the other ends 2b, 3a of the extensions 2, 3.
Facing b. The leg portion 9 is
a, 9b are magnetized to south poles, and legs 10a, 10b of yoke 10 are magnetized to north poles. When the electromagnetic coil (not shown) surrounding the armature 1 is excited, the armature 1 is angularly displaced around the axis of the support part 4, and the movable contact 7 is connected to the fixed contact 6 as shown in FIG. Contact. This causes the load current I
flows in the direction shown in FIG. 15, or in the direction shown in FIG. 15, 2. The armature 1 is excited by this load current I. For example, when the load current I flows in the direction shown in FIG.
The end portion 2a of is magnetized to the north pole, and the other end portion 2b is magnetized to the north pole. Further, one end 3a of the extending portion 3 is magnetized to an S pole, and the other end 3b is magnetized to an S 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 the magnetic attraction force is generated between the end 2b of the extending portion 2 and the end 3b of the extending portion 3. End 3
A magnetic repulsion force is generated between a and a. Load current I
If the magnetic force is considerably large, for example, 20 A or more, the magnetic attractive force will be magnetically saturated, but the repulsive force will increase based on the strength of the load current I, so that the end of the extension portion 2 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, and the vibration and impact resistance characteristics are also 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. As shown in FIG. 15, when the load current I flows in the opposite direction, magnetic repulsion is generated at the ends 2a and 3b,
Magnetic adsorption force is generated at point b, and as before, the aperture 1
The holding force between the yokes 2 and 3 is reduced. In order to prevent the holding force from decreasing due to the load current I, Japanese Patent Application Laid-Open No. 55-33769 provides ammatures on both sides or around the thickness of the longitudinal elastic member, and adjusts the angular displacement of the ammatures in one direction or the other direction. Thus, the longitudinal elastic member and either one of the contact points or the other contact point are in a conductive state, and in the cross section seen from the width direction of the longitudinal elastic member, the armature has an X-shape that is stretched in the longitudinal direction of the longitudinal elastic member. The configuration is disclosed.

According to such a configuration, both ends of only one of the two diagonal directions forming the X-shape are attracted to the yoke. At this time, the magnetic flux flowing through the armature can only be used by about 1/2 of the cross-sectional area of the armature. In other words, only about half of the weight and volume of the amachia can be effectively utilized.
Furthermore, amphitheaters are further arranged on both sides of the longitudinal elastic member in the thickness direction, and a space for angular displacement of the amphitheaters is also required. Therefore, it is necessary to increase the interval between the legs of the yoke provided on the outside of the armature, and it is also necessary to increase the inner diameter of the electromagnetic coil for angularly displacing the armature. Therefore, it is difficult to miniaturize the latching relay.

Purpose The purpose of this invention is to solve the above technical problems,
Latching that prevents the holding force between the armature and the yoke due to the permanent magnet from being reduced by the current flowing through the longitudinal elastic member 27, maintains vibration and shock resistance characteristics, and can be made smaller. It is to provide a relay.

Configuration The present invention has (a) an elongated plate shape, one longitudinal end of which is provided with a movable contact 34 capable of contacting and separating from a fixed contact 33, and the other longitudinal end located at a fixed position. (b) a longitudinal elastic member 27 that is attached to an intermediate position in the longitudinal direction of the longitudinal elastic member 27 and has an axis that intersects the longitudinal direction of the longitudinal elastic member 27 and extends in the width direction; Support portions 30 formed to surround the longitudinal elastic member 27 on both sides of the longitudinal elastic member 27 in the thickness direction;
Longitudinal elastic members 27 are connected to both ends of the longitudinal elastic member 27 in the axial direction, and are spaced apart from each other in the width direction of the longitudinal elastic member 27.
The armature 2 has a pair of extension parts 28 and 29 extending in the longitudinal direction of the armature 2 and is capable of angular displacement about the axis.
(c) an electromagnetic coil 25 wound around the outside of the armature 26 for exciting the armature 26 in the longitudinal direction of the longitudinal elastic member 27; (d) magnetized in the thickness direction of the longitudinal elastic member 27; (e) a pair of yokes 22 and 23 formed roughly in a U-shape and magnetized by the permanent magnet 24, each yoke 22 and 23 being connected to the electromagnetic coil 25;
When the extending portions 28, 29 of the armature 26 are excited in one direction, the armature 26 is angularly displaced in one direction around the axis of the support portion 30, and both ends of the extending portions 28, 29 in the longitudinal direction are When the first legs 22a, 23b that attract the parts and the extension parts 28, 29 are excited in the other direction, the armature 26 is angularly displaced in the other direction to attach the extension parts 28, 29 to both ends in the longitudinal direction. and connecting portions 22c, 23c that connect the first and second leg portions 22a, 22b; 23a, 23b and are joined to the magnetic poles of the permanent magnet 24. , such yokes 22 and 23; (f) When both ends of the extension portions 28 and 29 are attracted to the first leg portions 22a and 23b of the yokes 22 and 23, the movable contact 34 This latching relay is characterized in that it contacts the fixed contact 33 and conducts between the fixed contact 33 and the other end of the longitudinal elastic member 27.

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 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 23c is the N pole.
The side facing the 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 that is continuous with the extending portions 28 and 29. A through hole 31 is formed in the support portion 30 and extends in parallel to the extension portions 28 and 29. The longitudinal elastic member 27 is inserted into the through hole 31 and is caulked and connected with the pin 32, so that the longitudinal elastic member 27 and the armature 26
are integrated. The longitudinal elastic member 27 has a linear shape, and a movable contact 34 that can come into contact with and separate from the fixed contact 33 is provided at one end thereof. The other end of the longitudinal elastic member 27 is coupled to a common terminal 35 .

In the armature 26 having such a configuration, the electromagnetic coil 25 is excited, and the armature 26 is angularly displaced around the axis of the support portion 30, so that the fixed contact 3
When the movable contact 34 contacts the contact point 3, a load current I flows as shown in FIG. At this time, the magnetic flux generated by this load current I is
Follow the route shown. That is, a closed loop tracing between the side walls 30a and 30b of the support portion 30 is formed. Therefore, it is possible to reduce as much as possible the magnetic flux that causes the repulsive force generated between the yokes 22, 23 and the extensions 28, 29 due to the load current I, as in the conventional case. Therefore, it is possible to reduce the influence on the holding force caused by the load current I, reduce the deterioration of vibration and shock resistance characteristics, and reduce the impact on the armature 26 and yokes 22, 23.
It is possible to prevent the contacts 33 and 34 from separating. Furthermore, in this embodiment, since the longitudinal elastic member 27 is straight, manufacturing accuracy 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. In this embodiment, the support section 40 includes a first support section 40a and a second support section 40b. This first support part 40
a and the second support part 40b are shifted in the longitudinal direction of the extension parts 28, 29, and the first support part 40a is aligned with the movable contact 3.
The second support portion 40b is located on the movable contact 34 side.
It is formed so that it is located at a position farther away from the A gap 41 through which the longitudinal elastic member 27 can be inserted is formed between the first support part 40a and the second support part 40b. The longitudinal elastic member 27 is inserted into the gap 41, and the support portions 40a, 40b and the longitudinal elastic member 27 are caulked together, and the longitudinal elastic member 27 is integrated with the armature 26. Note that welding may be used instead of caulking.

In the armature 26 having such a configuration, when the load current I flows in the direction shown in FIG. 7, a magnetic flux path as shown by reference numeral C in FIG. 7 is formed by the load current I. Ru. This makes it possible to minimize the generation of magnetic flux for generating repulsion at both ends of the yokes 22 and 23, as in the conventional case. Therefore, it is possible to minimize the decrease in the holding force between the armature 26 and the yokes 22, 23. Note that in this embodiment as well, the longitudinal elastic member 27 is formed in a straight line, so that the dimensional accuracy is improved. Furthermore, since the amachia 26 can be mass-produced by press working, it is possible to reduce manufacturing costs.

FIG. 10 is a perspective view of still another embodiment of the amatea according to the present invention, FIG. 11 is an exploded perspective view of the amatea shown in FIG. 10, and FIG. 12 is an exploded perspective view of the amatea shown in FIG.
FIG. 2 is a sectional view taken along section line XII-XII in the figure. This embodiment is similar to the previous embodiment and corresponding parts are provided with the same reference numerals. In this embodiment, the direction of displacement between the first support part 40a and the second support part 40b is opposite to that in the embodiment shown in FIG. In other words, the first support part 40a is better than the second support part 40b.
It is located at a position distant from the movable contact 34.

FIG. 13 is a diagram for explaining the operating state when the load current I flows through the armature shown in FIG. 10. When the electromagnetic coil 25 is excited and the armature 26 is angularly displaced and comes into contact with the yokes 22 and 23, for example, a load current I flows in the direction indicated by the arrow. As a result, magnetic flux paths Q1, Q2, and Q3 shown by imaginary lines are formed in the armature 26. Due to the magnetic flux paths Q1 and Q2, the end 28a of the extension 28 and the end 29b of the extension 29 of the armature 26 are magnetized to the S pole, and the end 28b of the extension 28 and the end 29b of the extension 29 are magnetized to the S pole. The end portion 29a is magnetized to the north pole. As a result, the end portion 28a and the yoke 22
A magnetic attraction force is generated between the end portion 28b and the yoke 23 as well as between the end portion 28b and the yoke 23. Also, between the end portion 29a and the yoke 22, and between the end portion 29b and the yoke 22,
3, a magnetic repulsion force is generated between the two. However, since the magnetic attraction force is generated in the upper part with respect to the support part 40 and the magnetic repulsion force is generated in the lower part with respect to the support part 40, the ends 28a and 28b are
3, the phenomenon in which the ends 29a and 29b separate from the yokes 22 and 23 does not occur.
In this manner, in this embodiment, it becomes possible to absorb the repulsive force generated between the armature 26 and the yokes 22 and 23, as in the conventional case, by inversely utilizing the magnetic flux caused by the load current I. Furthermore, since a magnetic flux path Q3 forming a closed loop is generated between the first support portion 40a and the second support portion 40b, this closed loop magnetic flux also generates a repulsive force on the armature 26 as in the conventional case. It becomes possible to absorb the magnetic flux caused by

Note that when the load current I flows in the opposite direction to that shown in FIG. , the armature 26 does not separate from the yokes 22 and 23 as described above.

Effects of the Invention As described above, according to the present invention, when a load current flows through the longitudinal elastic member 27, magnetic flux due to this current is generated near the support portion 30 surrounding the armature 26. Thereby, the magnetic flux that reduces the attractive force between the yokes 22 and 23 and the armature 26 can be reduced as much as possible, and the armature 26 and the yoke 22,
23 can be maintained. In addition, it is possible to prevent deterioration of vibration resistance and impact resistance characteristics, and furthermore, the armature 26 and yokes 22, 23
This makes it possible to prevent contact separation and reduce contact separation as much as possible.

Further, according to the present invention, the extending portions 2 of the armatures 26 are arranged on both sides of the longitudinal elastic member 27 in the width direction.
When 8 and 29 are attracted to the yokes 22 and 23,
The entire cross section of the extensions 28 and 29 can be effectively used to flow the magnetic flux. Furthermore, York 2
Legs 22a, 22b, 23a, 23b of 2, 23
Since the spacing between can be made smaller, the latching relay can be made smaller.

Furthermore, according to the present invention, the weight of the armature 26 can be reduced, so that when excited by the electromagnetic coil 25, the armature 26 can undergo rapid angular displacement. Therefore, the current that excites the electromagnetic coil 25 can be reduced, and the time for excitation can also be shortened, so that the excitation power can be reduced.

[Brief explanation of drawings]

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 shown in Fig. 1, Fig. 3 is a longitudinal sectional view of the latching relay shown in Fig. 1, and Fig. 4 is according to the present invention. FIG. 5 is an exploded perspective view of the embodiment shown in FIG. 4, FIG. 6 is a sectional view taken along the cutting plane line of FIG. 4, and FIG. 7 is an amachia according to the present invention. A perspective view of another embodiment, FIG.
FIG. 9 is an exploded perspective view of the armature of the illustrated embodiment; FIG.
11 is an exploded perspective view of the embodiment shown in FIG. 10, and FIG. 12 is a sectional view taken along section line XII-XII in FIG. 10. , FIG. 13 is a diagram for explaining the operating state of the armature according to the load current of the embodiment shown in FIG. 10, FIG. 14 is a side view of the armature used in a conventional latching relay, and FIG.
FIG. 4 is a perspective view of the prior art armature shown in FIG. 4; 22, 23... Yoke, 24... Permanent magnet piece,
25... Electromagnetic coil, 26... Amachia, 27...
...Longitudinal elastic member, 28, 29... Extension portion, 30,
40...Support part, 31...Through hole, 33...Movable contact, 34...Fixed contact, 41...Gap.

Claims (1)

[Claims for Utility Model Registration] (a) It has an elongated plate-like shape, and one longitudinal end thereof is provided with a movable contact 34 that can make contact with and release from a fixed contact 33, and the other longitudinal end is (b) a longitudinal elastic member 27 attached at a fixed position; Longitudinal elastic members 27 are provided on both sides of the elastic member 27 in the thickness direction.
a support part 30 formed to surround the support part 30; and a pair of parts connected to both ends of the support part 30 in the axial direction and extending generally in the longitudinal direction of the longitudinal elastic member 27 with an interval in the width direction of the longitudinal elastic member 27. (c) an armature 26 that is wound around the outside of the armature 26 and that excites the armature 26 in the longitudinal direction of the longitudinal elastic member 27; (d) a permanent magnet 24 magnetized in the thickness direction of the longitudinal elastic member 27; (e) a magnet 24 formed roughly in a U-shape and magnetized by the permanent magnet 24; A pair of yokes 22 and 23, each yoke 22 and 23 is connected to the extension portion 28 of the armature 26 by the electromagnetic coil 25.
When 29 is excited in one direction, the armature 26
The first leg parts 22a and 23b are angularly displaced in one direction around the axis of the support part 30 to adsorb both longitudinal ends of the extension parts 28 and 29, and the extension part 2
8 and 29 are excited in the other direction, the armature 26 is angularly displaced in the other direction to open the extension portions 28 and 29.
The second leg portion 22 adsorbs both longitudinal ends of the
b, 23a, and the first and second leg portions 22
a, 22b, 23a, and 23b, and a connecting portion 22 that is joined to the magnetic pole of the permanent magnet 24.
Such a yoke 2 having c, 23c
(f) When both ends of the extension parts 28 and 29 are attracted to the first leg parts 22a and 23b of the yokes 22 and 23, the movable contact 34 connects to the fixed contact 3;
3, the fixed contact 33 and the longitudinal elastic member 27
A latching relay characterized in that conduction is established between the other end of the latching relay and the other end of the latching relay.