JPH0346937B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic relay (hereinafter referred to as a relay).
Regarding.

[Conventional technology]

As a conventional relay of this kind, there is one shown in FIG. 1, for example. In FIG. 1, a coil 1, which is an electromagnetic force generation source, is wound around one bobbin 2, and the bobbin 2 is fitted around a pole (iron core) 3, thereby being wound. Further, the magnetic circuit is formed by connecting one end of the pole 3 to a yoke (yoke) 4 by caulking, screwing, or the like.

Then, the movable iron piece 5 is attracted by the magnetomotive force at the pole 3 due to the energization of the coil 1, and the movable contact member 6 made of a plate spring is operated, and the movable contact 7, the stopper 8, and the normally open fixed contact 9 are connected. Configured to open or close.

[Problem to be solved by the invention]

However, in the case of such conventional relays, firstly, when the number of turns of the coil is increased to obtain the required magnetomotive force, the amount of coil used increases dramatically due to the thickening of the windings, resulting in a decrease in cost effectiveness. Moreover, since the heat dissipation area increases dramatically, the temperature rise of the coil increases. Second, since the pole and yoke are connected by caulking or screwing,
The drawback is that dimensional accuracy control and assembly accuracy control for both are required, resulting in a decrease in productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic relay that eliminates the drawbacks of the prior art, provides a large magnetomotive force with a small amount of coils used, and has good heat dissipation and productivity.

[Means to solve the problem]

The electromagnetic relay according to the present invention is an electromagnetic relay in which a pole is fitted to a coil bobbin around which a coil is wound, and contacts are opened and closed by electromagnetic force generated in the pole by energization of the coil, in which the coil bobbin 13 is A pair of spool parts 23A, 23 around which the coils 12, 12 are wound, respectively
B, and a pair of upper flanges 25A, 25B formed at the upper ends of both spool parts 23A, 23B, respectively.
, a single lower flange 24 formed continuously at the lower ends of both spool parts 23A, 23B, and a pair of wall parts 28, 29 protruding from the lower surface of this lower flange 24 to form a space 30. A pair of the poles 21 are arranged in parallel with each other with both ends aligned, and both poles 21 are arranged in parallel with each other with both ends aligned.
A yoke 22 is integrally installed between the same side ends of the poles 21, 21, and the U-shaped core 11 is formed by these poles 21, 21 and the yoke 22. Both spool parts 23A and 23B are fitted into each other, and the ends of both poles 21 and 21 extend and protrude into the space 30 on the lower surface of the lower flange 24, and within this space 30, The wall portions 28, 29
A pair of coil terminal members 17 and 18 for energizing the coil 12 are assembled at positions facing one of the poles 21, and a pair of contacts for energizing the contacts are installed at positions facing the other pole 21. terminal member 15,1
A fixed contact 38 is fixed to one contact terminal member 15, and an extension 16d extends between the coil terminal members 17 and 18 to the other contact terminal member 16. The movable contact member 14 has a fixed end portion 35 fixed to the distal end of the extension portion 16d, and further includes: The movable contact member 14 has a free end extending between the coil terminal members 17 and 18 to the position of the fixed contact 38, and has a movable contact 37 at the free end facing the fixed contact 38. In addition, a movable iron piece 36 is fixed to both poles 2 in the middle part of the movable contact member 14.
1 and 21, and the coil 12 is wound around the pair of spool parts 23A and 23B so that the directions of the magnetomotive forces of both pole parts 21 and 21 are in the same direction. It is characterized by

[Operation] According to the above-described means, the yoke part and the pole part are formed into a U-shaped core, and the coil is attached to a pair of spool parts in which both pole parts of the core are fitted, so that the direction of the magnetomotive force is the same. Since the coils are wound in such a way that the attractive force of both pole parts works together with the movable iron piece of the movable contact member, the number of turns of the coil can be increased while suppressing the amount of coil used. A large magnetomotive force can be obtained, and the surface area of the coil can be increased to improve heat dissipation. Furthermore, the end of each pole fitted to the pair of spool parts is extended and protruded into the space formed by the pair of walls protruding from the lower surface of the lower flange and to which the terminal member is attached. Since the movable contact member is disposed on the side surface of the pole, the electromagnetic relay can be downsized without increasing its length. Moreover, by arranging the movable iron piece of the movable contact member to face the side surfaces of the pair of poles of the U-shaped core, the surface of the pole facing the movable iron piece can be in its longitudinal direction, so that the pole can be moved. The area facing the iron piece can be increased, and an efficient magnetic circuit can be constructed.
Then, by fitting the pole of the U-shaped core into the integrally formed coil bobbin, attaching the terminal member to the wall of the coil bobbin, and arranging the movable contact member in the cavity of the coil and bobbin, these Since the component parts can be made into a unit, assembly processes such as assembling the cover and base and processing the terminals of the coil can be made easier.

〔Example〕

FIGS. 2 to 11 are a perspective view, a front sectional view, a sectional view, a bottom view, and an illustrative embodiment of the present invention.
They are a sectional view, a - sectional view, a - sectional view, a bottom view of the base, a plan view of a coil winding method, and a side view.

In this embodiment, this relay includes a magnetic circuit member (hereinafter referred to as core) 11, a coil 12 which is an electromagnetic force generation source, a coil bobbin 13 around which this coil 12 is wound, and a movable contact member 14 that opens and closes. , first, second, third and fourth terminal members 15, 16, 17, 18, and a base 19
and a cover 20.

The core 11 is composed of a pair of pole parts 21 formed in the shape of a square column and a yoke part 22 formed in the shape of a substantially boat-shaped plate. A yoke portion 22 is installed and welded between each end of the yoke portion 22 to form a substantially U-shaped integral structure. The core 11 is provided with an auxiliary pole 51 that is magnetically integrated with one of the poles 21 during assembly, and the auxiliary pole 51 is attached to the back as shown in FIGS. 2 and 9. It is formed in a refractive shape.

The coil bobbin 13 is integrally molded from synthetic resin, and the bobbin 13 has a spool portion 23 around which the coil 12 is wound. (Indicate the direction when looking directly toward Figure 3.)
We have a pair for you. Left and right spool parts 23A, 2
3B are each formed into a square tube shape into which the pole portions of the core can be fitted, and are erected at right angles parallel to each other on the lower flange 24 at intervals corresponding to the spacing between both pole portions. The left and right spool parts 23A and 23B have left and right upper flanges 25.
A and 25B are jutted out at right angles,
A gap 26 is provided between the left and right upper flanges 25A and 25B. Furthermore, recesses 27A and 27B are sunk into the upper surfaces of the left and right upper flanges 25A and 25B so that the yoke portion 22 of the core can be fitted therein.

Standing walls 28 and 29 are protruded from the front and rear parts of the lower surface of the lower flange 24 of the coil bobbin 13, respectively, and a space 30 is formed between the front and rear walls 28 and 29. A cut groove 31 for holding the first terminal member 15 is formed at the left end of the front wall portion 28 so as to open in an inverted L-shape at the left end and extend to the right. has an auxiliary pole elongated hole 5 for holding the auxiliary pole 51.
2 opens a part of the rear side into the space 30 and creates a cut groove 31
It is cut parallel to the An elongated hole 33 for holding the third terminal member 17 is formed at the right end of the front wall portion 28 so that the elongated hole 33 opens at the lower surface and extends from left to right in the longitudinal direction. At the left and right ends of the rear wall portion 29,
Elongated holes 32 and 34 for holding the second and fourth terminal members 16 and 18, respectively, are opened at the lower surface and are formed so that their longitudinal directions extend left and right.

The movable contact member 14 is formed into a substantially rectangular plate shape from an elastic conductive material such as a leaf spring, and has a fixed end portion 35 bent into a substantially Z-shape at one end thereof. A movable contact 37 is welded to the other end of the movable contact member 14, and a movable iron piece 36 formed from a magnetic material into a three-dimensional shape similar to a blotting paper holder is disposed in the middle of the movable contact member 14, and the movable iron piece 36 is formed from a magnetic material into a three-dimensional shape similar to a blotting paper holder. Welded.

The first terminal member 15 has an insertion portion 15a that is inserted into the inverted L-shaped cut groove 31 of the coil bobbin 13, and in an inserted state (the same applies hereinafter), the first terminal member 15 is bent backward from the insertion portion 15a and then vertically downward. A contact welding part 15c which hangs vertically downward from the rear end of the inverted L-shaped insertion part 15a and has a fixed contact 38 welded to its rear surface, and The heat dissipating plate part 15d is raised at right angles to the radiator plate part 15d, and is integrally formed by press working or the like using a conductive plate material (second, third, fourth terminal members 16, 17, 18
Similarly, they are each integrally molded. ).

The second terminal member 16 includes an insertion portion 16a that is inserted into the long hole 32 on the rear wall of the bobbin 13, and a terminal portion 16b that is substantially suspended from the insertion portion 16a.
and a stopper portion 16c extending leftward from the lower position of the insertion portion 16a and bent forward at a substantially right angle.
, an extension part 16d extending to the right in a meandering manner from the upper right side of the terminal part 16b, and an extension part 1
The movable contact member fixing portion 16e is bent to the right at the right end of the contact member 6d.

The third terminal member 17 and the fourth terminal member 18 are formed approximately symmetrically in the front and back, and have insertion portions 17a and 18a inserted into the long holes 33 and 34 in the front and rear walls of the bobbin, respectively, and insertion portions 17a and 18a,
Terminal parts 17 each hanging from 18a
b, 18b, and coil terminal connecting portions 17c, 18 which extend to the right from the lower position of each insertion portion 17a, 18a and are formed so as to be easily foldable.
It is equipped with c.

The base 19 is integrally molded from synthetic resin, and includes a base portion 39 that is a rectangular flat plate that is approximately the same as the lower flange 24 of the bobbin 13, and a connector insertion portion 4 that projects from the lower surface of the base portion 39 in a rectangular cylindrical shape.
0. The base portion 39 has first to fourth
Elongated holes 41, 42, 43, 44 are arranged in two rows, front and back, with the longitudinal direction facing left and right, and each elongated hole is formed in each terminal portion 15b, 16b of the first to fourth terminal members. , 17b, 18b are inserted therethrough and fixed therein. The connector insertion portion 40 is formed so as to entirely surround a plurality of terminal portions fixed to each elongated hole, and is also formed so as to allow insertion of a general-purpose connector. At the center of the front wall of the connector insertion portion 40, a retaining claw portion 45 is provided to protrude from the center of the front wall portion of the connector insertion portion 40, and engages with a portion of the inserted connector to prevent the connector from coming off.

The cover 20 is integrally molded into a substantially box-like shape with an open bottom, and the depth of the cover 20 is set to be deeper than the height of the core 11 by about the thickness of the base substrate 39. The opening of the cover 20 is formed to have almost the same shape as the base base part 39, and an appropriate number of engaging claws 46 are protruded on the inner edge of the opening so that they can engage with the outer edge of the lower surface of the base base part 39. It is set up. Further, as shown in FIG. 7, a mounting hole 47 for press-fitting a mounting bracket 48 is formed in the upper part of the rear wall of the cover 20. As shown in FIG.

Next, the assembly work and operation will be explained.

First, the pair of spool parts 2 of the coil bobbin 13
The coil 12 is wound around 3A and 23B so that the directions of magnetomotive force from both are in the same direction. As a method for winding such a coil, a method as shown in FIGS. 10 and 11 may be used. first,
The coil 12 is completely wound around one spool portion 23B, starting from the bottom and ending at the bottom. Subsequently, the coil 12 is attached to the other spool portion 23.
The coil is completely wound around A by starting from the bottom and ending at the bottom, but at this time, in a figure-eight relationship, the later coil winding direction is opposite to the previous coil winding direction on the spool part 23B. Winding can begin on the subsequent spool portion 23A.

According to the coil winding method shown in FIGS. 10 and 11, since the winding start for both spool parts is located at the lowest end, the capillary of the coil winding device is 50 is inserted into a slight gap 26 between two adjacent spool parts 23A and 23B and turned, and the winding is transferred from the previous spool part to the next spool part without being disturbed by the finished coil. is possible,
Therefore, the winding work can be completed continuously on the two spool parts, and work efficiency can be improved.

Furthermore, since the winding and turning directions of the coils in both spool parts 23A and 23B are opposite to each other, the direction of the magnetomotive force due to the two wound coils is the same as shown by the broken line in FIG. .

The coil bobbin 13 around which the coil 12 is wound has first to fourth terminal members 15, 16, 17, 1
8 are those insertion parts 15a, 16a, 17a,
18a is inserted into the cut groove 31 and the elongated holes 32, 33, and 34, and assembled in a predetermined arrangement relationship. Further, the auxiliary pole 51 is inserted into the auxiliary pole elongated hole 52. Coil bobbin 13 has core 1
1 connects both pole parts 21, 21 to the spool part 23.
A, 23B, and is assembled by fitting the yoke part into the upper flange recess 27A, 27B,
As a result, the coils 12 are wound around both pole portions. In this state, the auxiliary pole 51 comes into contact with the pole part 21 on the first terminal member 15 side and is magnetically integrated with it, and extends toward the other pole part 21.

The front and rear walls 28, 2 of the coil bobbin 13
The movable contact member 1 is placed in the space 30 formed between the
A fixed portion 35 at the right end of the movable contact member 14 is fixed to a fixed portion 16e at the right end of the second terminal member 16 by welding or the like. In this state, the movable iron piece 36 of the movable contact member 14 faces the lower rear surface of both pole parts 21 of the core 11 press-fitted into the spool part. Further, the left end rear surface of the movable contact member 14 is located at the left stopper portion 16c of the second terminal member 16.
Due to its elastic force, the movable contact 37 on the front
is opposed to the normally open fixed contact 38 of the first terminal member 15.

Both ends 12a and 12b of the coil 12 wound around the coil bobbin 13 are inserted into the connecting portions 17c and 18c of the third and fourth terminal members 17 and 18, respectively, and are fusing-welded.

A coil induced voltage suppressing element 49 such as a resistor or a diode is arranged in the adjacent space between both wound coils of the coil bobbin 13, and this element 49 connects both lead wires 49a and 49b to the lower flange 2 of the bobbin.
The third,
Insert portion 17a of fourth terminal member 17, 18,
The coil 18a is electrically connected to the coil 12 and fixed to the coil bobbin 13 by welding or the like at the outer openings 33a, 34a of the long holes 33, 34 of the front and rear walls 28, 29.

The base 19 connects each terminal portion 15b, 16b, 17b, 18b to each elongated hole 41, 42, 43, 44 of the first to fourth terminal members 15, 16, 17, 18 assembled on the coil bobbin 13, respectively. It is assembled by being inserted. In this state, the coil bobbin 13 is covered with the cover 20 , and the cover 20 engages the claws 46 at the lower end with the outer edge of the lower surface of the base part 39 of the base 19 , so that the coil bobbin 13 and the base 19 are closed.
to become fixed. Thereby, the coil bobbin and the base, and the coil bobbin and the core 11 are fixed in a state where they are prevented from coming off.

Note that the order of the assembly work is not limited to the above explanation, and can be changed as appropriate depending on the convenience of the work.In short, the assembly configuration is completed as shown in FIGS. That's fine.

In the relay according to the above configuration, the coil 12
When a current is applied to the pole portions 21, 21, electromagnetic force is generated. At this time, since the winding directions of the coils wound around both pole parts are opposite to each other, the magnetomotive force at both pole parts 21, 21 of the core 11 integrally molded in a U-shape is directed in the opposite direction. The same direction, that is, both pole parts are created to work together to exert a suction effect. Due to the cooperating magnetomotive force of both pole parts, the movable iron piece 36 facing it is attracted, and the movable contact member 1
4 is bent in the suction direction, and the movable contact 37 comes into contact with the fixed contact 38. At this time, the auxiliary pole 51
assists the suction to the movable iron piece 36 by the cooperation of both pole parts 21, 21. In this way, the movable iron piece 36 is strongly attracted by the magnetomotive force generated by the cooperation of both pole parts 21, 21 and the assistance of the auxiliary pole 51, so that the contact between the movable contact 37 and the fixed contact 38 can be made reliably and completely. You will be killed. This contact causes the terminal portion 15b of the first terminal member to
and the second terminal member 16b are the fixed contact 3
8, movable contact 37, movable contact member 14, fixed part 3
5 and 16e, and are electrically connected via the extension portion 16d, and an electric circuit connected between both terminal portions 15b and 16b is closed.

When the energization of the coil 12 is stopped, both pole parts are extinguished, the movable contact member 14 returns to its original state due to its own elastic force, and the movable contact 37 separates from the fixed contact to open an electric circuit.

According to this embodiment, since the core has a structure in which the yoke part and the pole part are integrated, the conventional work of fixing the yoke and the pole by caulking or screwing is unnecessary. It is possible to omit the dimensional accuracy control and assembly accuracy control necessary for fixing the two, thereby improving productivity.

In addition, the coil is attached to a pair of pole parts of the U-shaped core so that the direction of the magnetomotive force is the same, that is, the attractive force of both pole parts works together on the movable iron piece. Since it has a structure in which each coil is wound around a single pole, the number of coil turns can be increased when using a coil of the same length, compared to a conventional relay in which a coil is wound around a single pole. In other words, as the coil is wound, the circumferential length required for one winding increases due to the thickening of the winding, but in this example, the coil is wound around two poles separately, so the circumferential length due to the thickening of the winding increases. Therefore, if the length of the coil is the same, the number of turns of the coil can be increased. Here, the magnetomotive force increases in proportion to the product of the number of turns of the coil and the current flowing through it, so if the number of turns of the coil can be increased, the magnetomotive force can be increased without increasing the current. Furthermore, the desired magnetomotive force can be obtained with a shorter coil than in the conventional case, and the amount of coils used can be reduced.

Furthermore, since the coil is divided into two pole parts and wound, the outer circumferential surface area of the coil after winding becomes large, and heat dissipation becomes good, so that temperature rise can be suppressed.

Incidentally, since the first terminal member 15 is provided with a protruding heat sink portion 15d, it is possible to cool the heat generated due to the contact and separation between the fixed contact 38 and the movable contact 37.

Since both pole parts are formed in the shape of a rectangular column, even when the movable iron piece 36 of the movable contact member 14 is disposed opposite to the side surface of both pole parts, they can be placed at a constant distance over the entire length, and the movable contact member In addition to ensuring reliable opening and closing operations, by placing the movable contact member next to the pole part, the overall height of the relay can be reduced.

By bringing the auxiliary pole into contact with one of the pole parts and magnetically integrating them, the attractive force of both pole parts to the movable iron piece can be further increased.

When the attraction force is increased, the number of turns of the coil can be reduced and the amount of power applied can be promoted accordingly. Furthermore, when the suction force is increased, it is possible to bring the contacts into more complete contact, so that the external vibration resistance between the contacts and the durability of the contacts can be improved. That is, if the suction force is weak, the contacts will easily open due to external vibrations, impairing the switching reliability of the relay. Furthermore, due to this opening, the contact resistance between the contacts increases and the contacts themselves are melted, resulting in a decrease in durability. However, if the suction force is strong, such problems will be prevented from occurring.

In the above embodiments, a case was explained in which the coils were wound around both pole parts by fitting the bobbins, each of which was wound with a pair of spool parts, into a U-shaped core. Alternatively, the coil may be wound around both pole parts by fitting two bobbins each having a coil wound around each pole part. Also, 1
It is not limited to the case where one coil is wound continuously around two bobbins (spools), but after the two coils are wound around two bobbins (spools), the predetermined ends of each are connected. You can also do this.
Furthermore, the coil is not limited to being wound in a single coil, but multiple coils may be wound in parallel.

The shapes, structures, etc. of the core, yoke part, and pole part are not limited to those in the above embodiments. For example, the pole part is not limited to a square pillar, but may be a circular pillar, and the core has poles at both ends of the yoke part. It is not limited to a structure in which parts are welded together to form an integrated structure, but it is also possible to form an integrated structure by bending a bar or plate into a U-shape, or by punching or fusing a thick plate into a U-shape. It may be a structure that consists of

(Effects of the Invention) Furthermore, the shapes, structures, etc. of the coil bobbin, movable contact member, each terminal member, base and cover are not limited to the above embodiments.

As explained above, according to the present invention, the yoke part and the pole part are formed into a U-shaped core, and the coil is attached to a pair of spool parts in which both pole parts of the core are fitted in the direction of the magnetomotive force. Since the coils are wound in the same direction, that is, the attractive force of both poles works together on the movable iron piece of the movable contact member, the number of turns of the coil can be increased while suppressing the amount of coil used. In addition, the surface area of the coil can be increased to improve heat dissipation. Furthermore, the end of each pole fitted to the pair of spool parts is extended and protruded into the space formed by the pair of walls protruding from the lower surface of the lower flange and to which the terminal member is attached. Since the movable contact member is disposed on the side surface of the pole, the electromagnetic relay can be downsized without increasing its length. Moreover, by arranging the movable iron piece of the movable contact member to face the side surfaces of the pair of poles of the U-shaped core, the surface of the pole facing the movable iron piece can be in its longitudinal direction, so that the pole can be moved. The area facing the iron piece can be increased, and an efficient magnetic circuit can be constructed. Then, the pole of the U-shaped core is fitted into the integrally formed coil bobbin,
By attaching the terminal member to the wall of the coil bobbin and arranging the movable contact member within the space of the coil bobbin, these components can be made into a unit, making it easy to assemble the cover and base, process the coil terminals, etc. The assembly process can be made easier.

Extension portion 16 on one contact terminal member 16
d extends to the outside of the pole 21 arranged on the opposite side, and the movable contact member 1 is attached to this extension portion 16d.
4 is fixed, the movable contact 37 fixed to the free end of the movable contact member 14 can be opposed to the fixed contact 38, and
A movable iron piece 36 fixed to the intermediate portion of the movable contact member 14 can be opposed to both poles 21, 21. In other words, since the movable contact member 14 is arranged within the range of the minimum required four terminal members 15, 16, 17, and 18, as a result, the contact mechanism is housed within the range of the four terminal members. ,
The electromagnetic relay can be miniaturized, and together with the above effects, a compact and smart electromagnetic relay can be obtained, and for example, the workability of assembling it into the body of an automobile can be improved.

Further, a heat dissipation plate portion 15d is integrally protruded from the terminal member 15 to which the fixed contact 38 is fixed, and this heat dissipation plate portion 15d is engaged with one of the upper flange 25A and the lower flange 24 of the coil bobbin 13. Fixed contact 3
8 and the movable contact 37 can be effectively cooled, and the fixed contact 38 fixed to the terminal member 15 and the movable contact of the movable contact member 14 supported by the other terminal member 16 can be effectively cooled. In addition to the above-mentioned effect, the positioning accuracy with respect to 37 can be improved.

Furthermore, the convex portion of the cover 20 and the engaging claw portion 46
are engaged with the lower flange 24 and the base 19 from above and below, respectively, and the lower flange 24
is offset from the spool portions 23A and 23B, the effect that it is possible to prevent rattling of the internal mechanism and also to prevent the cover 20 from being assembled to the coil bobbin 13 in the opposite direction is achieved. Obtained in addition to the above effects.

[Brief explanation of drawings]

Figure 1 is a schematic longitudinal sectional view showing a conventional example;
Figures to Figure 11 show an embodiment of the present invention.
Figure 2 is an exploded perspective view, Figure 3 is a front sectional view, Figure 4 is a cross-sectional view of Figure 3, Figure 5 is a bottom view, and Figure 6 is a bottom view.
The figure is a sectional view of Fig. 3, Fig. 7 is a sectional view of Fig. 3, Fig. 8 is a sectional view of Fig. 3, Fig. 9 is a bottom view with the base removed, and Fig. 10 is a sectional view of Fig. 3. A plan view showing an example of the coil winding method, and FIG. 11 is a side view as well. 11... Core, 12... Coil, 13... Coil bobbin, 14... Movable contact member, 15-18...
...Terminal member, 19...Base, 20...Cover, 21...Pole part, 22...Yoke part, 2
3A, 23B... Spool portion, 24... Lower flange, 30... Hole, 31... Cut groove, 32-34...
...Elongated hole, 36...Movable iron piece, 37...Movable contact,
38... Fixed contact, 41-44... Long hole, 51...
...Auxiliary pole, 52...Elongated hole for auxiliary pole.

Claims (1)

[Claims] 1. In an electromagnetic relay in which a pole is fitted to a coil bobbin around which a coil is wound, and contacts are opened and closed by electromagnetic force generated in the pole when the coil is energized, the coil bobbin 13 has the following features: A pair of spool parts 23A, 2 around which the coils 12, 12 are wound, respectively
3B, and a pair of upper flanges 25A, 25 formed at the upper ends of both spool parts 23A, 23B, respectively.
B, a single lower flange 24 formed continuously at the lower ends of both spool parts 23A, 23B, and a pair of wall parts 28, 29 protruding from the lower surface of this lower flange 24 to form a space 30. A pair of the poles 21 are arranged in parallel with each other with both ends aligned, and both poles 21 are arranged in parallel with each other with both ends aligned.
A yoke 22 is integrally installed between the same side end portions of the poles 21, 21, and the U-shaped core 11 is formed by the poles 21, 21 and the yoke 22. are fitted into the spool parts 23A, 23B, respectively, and the ends of both poles 21, 21 are extended and protruded into the space 30 on the lower surface of the lower flange 24, respectively, and Wall parts 28, 29
A pair of coil terminal members 17 and 18 for energizing the coil 12 are assembled at positions facing one of the poles 21, and a pair of contacts for energizing the contacts are installed at positions facing the other pole 21. terminal member 15,1
A fixed contact 38 is fixed to one contact terminal member 15, and an extension 16d extends between the coil terminal members 17 and 18 to the other contact terminal member 16. The movable contact member 14 has a fixed end portion 35 fixed to the distal end of the extension portion 16d, and further includes: The free end of the movable contact member 14 extends between the coil terminal members 17 and 18 to the position of the fixed contact 38, and the movable contact 37 is connected to the fixed contact 38 at the free end.
A movable iron piece 36 is fixed to the middle part of the movable contact member 14 so as to face both poles 2.
1 and 21, and the coil 12 is wound around the pair of spool parts 23A and 23B so that the directions of the magnetomotive forces of both poles 21 and 21 are in the same direction. An electromagnetic relay featuring: 2. In an electromagnetic relay in which a pole is fitted to a coil bobbin around which a coil is wound, and contacts are opened and closed by electromagnetic force generated in the pole when the coil is energized, the coil bobbin 13 has coils 12 and 12, respectively. A pair of spool parts 23A, 2 to be wound
3B, and a pair of upper flanges 25A, 25 formed at the upper ends of both spool parts 23A, 23B, respectively.
B, a single lower flange 24 formed continuously at the lower ends of both spool parts 23A, 23B, and a pair of wall parts 28, 29 protruding from the lower surface of this lower flange 24 to form a space 30. A pair of the poles 21 are arranged in parallel with each other with both ends aligned, and both poles 21 are arranged in parallel with each other with both ends aligned.
A yoke 22 is integrally installed between the same side end portions of the poles 21, 21, and the U-shaped core 11 is formed by the poles 21, 21 and the yoke 22. are fitted into the spool parts 23A, 23B, respectively, and the ends of both poles 21, 21 are extended and protruded into the space 30 on the lower surface of the lower flange 24, respectively, and Wall parts 28, 29
A pair of coil terminal members 17 and 18 that energize the coil 12 and a pair of contact terminal members 15 and 16 that energize the contacts are respectively assembled to the terminal member 15. The contact 38 is fixed, and the movable contact member 14 is attached to the other contact terminal member 16.
is supported, and furthermore, the movable contact member 14 is supported by its movable iron piece 36.
is opposed to both poles 21, 21, and a heat sink portion 15d is integrally provided on the terminal member 15 to which the fixed contact 38 is fixed, and this heat sink portion 15d is connected to the coil bobbin 13. The coils 12 are respectively engaged with the upper flange 25A and the lower flange 24, and the coils 12 are wound around the pair of spool parts 23A and 23B so that the directions of the magnetomotive forces of both poles 21 and 21 are in the same direction. An electromagnetic relay characterized by: 3. In an electromagnetic relay in which a pole is fitted to a coil bobbin around which a coil is wound, and contacts are opened and closed by electromagnetic force generated in the pole when the coil is energized, the coil bobbin 13 has coils 12 and 12, respectively. A pair of spool parts 23A, 2 to be wound
3B, and a pair of upper flanges 25A, 25 formed at the upper ends of both spool parts 23A, 23B, respectively.
B, a single lower flange 24 formed continuously at the lower ends of both spool parts 23A, 23B and offset with respect to both spools 21, 21, and a hollow space 30 protruding from the lower surface of this lower flange 24. The poles 21 are provided with a pair of wall portions 28 and 29 forming an integral structure, and the poles 21 are arranged in parallel with each other with both ends aligned.
A yoke 22 is integrally installed between the same side end portions of the poles 21, 21, and the U-shaped core 11 is formed by the poles 21, 21 and the yoke 22. are fitted into the spool parts 23A, 23B, respectively, and the ends of both poles 21, 21 are extended and protruded into the space 30 on the lower surface of the lower flange 24, respectively, and Wall parts 28, 29
A pair of coil terminal members 17 and 18 that energize the coil 12 and a pair of contact terminal members 15 and 16 that energize the contacts are respectively assembled in the spools 23A and 23B. A movable contact member 14 having a movable iron piece 36 is disposed between the wall portion 29 protruding from the side where the lower flange 24 protrudes more, and both poles 21, 21, and the pair of spool portions 23A. , 23B, the coils 12 are wound around the poles 21, 21 so that the direction of the magnetomotive force is the same, and the terminal members 15, 16, 17
A base 19 is fitted to the lower end of the coil bobbin 13. On the other hand, a convex portion and an engaging claw portion 46 are spaced apart from each other in the axial direction on the inner periphery of the cover 20 surrounding the coil bobbin 13. The cover 20 is provided to protrude inward in the direction of the lower flange 2.
4, the convex portion and the engaging claw portion 46 are connected to the lower flange 2.
4 and the base 19 in a state where they are respectively engaged from above and below.