JPH06310009A - Manufacture of electromagnetic relay - Google Patents

Abstract

PURPOSE:To make assembly process automatic easily and provide excellently high sensitivity by forcedly bending a returning spring plate of a movable system part and attaching it to a yoke iron of an electromagnetic system part. CONSTITUTION:A base stand 18 with a state wherein a fixed terminal 23 having a fixed contact point 22 is inserted is formed in an end part. A contact point unit is composed by connecting one end part of a movable contact point spring plate 29 which has a movable contact point 28 at the other end with one end part of a lead conductor 30. An operation unit is composed by connecting one end of a returning spring plate 33 with one face of an armature 32. While being kept at a distance, the contact point unit and the operation unit are set face to face, united by a molding resin, the other end part of the conductor 30 is connected with a common terminal 31, and thus a movable system part 20 is composed. A bobbin 38 out of which a coil terminal 44 is projected, a coil 39, a iron core 40, and a yoke iron 41 are united to give an electromagnetic relay system part 21. After the system part 20 is stood on the stand 18 and the system part 21 is attached to the stand 18, the armature 32 and the plate 29 are forced to move by the returning force of the plate 33, the armature 32 is parted from the iron core 40 and the contact point 28 is parted from the contact point 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a small electromagnetic relay mainly mounted on a printed circuit board or inserted in a socket.

[0002]

2. Description of the Related Art Among such electromagnetic relays, an armature, which is a movable iron piece, is attracted and oscillated by being excited by energizing a coil, and the movable contact is fixed from a normally closed side fixed contact to a normally open side by this armature. A type called "transfer" which directly switches to a contact has a schematic configuration as shown in FIG. That is, the fixed terminal (2), the common terminal (3) and the coil terminal (4) forming a pair are fixed to the base table (1) in a penetrating state by insert molding or the like, and the upper end of each fixed terminal (2). The normally open side fixed contacts and the normally closed side fixed contacts (5a) and (5b) provided on the respective parts face each other at a predetermined interval. Further, the iron core (8) is inserted into the insulating bobbin (7) around which the coil (6) is wound, and the bobbin (7) is fixed to the yoke (9) by the iron core (8). (10) is placed on the base (1) and fixed by screws (11). A movable mechanism part (15) in which a movable contact spring plate (13) having a movable contact (12) at one end and an armature (14) are integrated by insert molding with a synthetic resin is formed by a pair of movable contacts (12). Position the armature (14) between the fixed contacts (5)
The upper end of the armature is swingably attached to the tip of the yoke (9), and is illustrated by a coil spring (16) for return suspended between the upper end of the armature (14) and the yoke (9). As described above, the armature (14) is urged to rotate away from the iron core (8), and the movable contact spring plate (13) integrated with the armature (14) has the movable contact (12) as a normally closed side fixed contact. It is urged to rotate in the direction of contacting (5b).
The movable contact spring plate (13) and the common terminal (3) and the coil (6) and the coil terminal (4) are electrically connected by a lead wire (17).

In the operation of this electromagnetic relay, when the coil (6) is energized, the armature (14) is attracted to the iron core (8) and the movable mechanism section (15) is returned to the coil spring (16).
The movable contact (12) is separated from the normally closed side fixed contact (5b) after contacting the normally open side fixed contact (5a) and is switched in the direction of the arrow in the figure against the urging force of. If the coil (6) is de-energized, the return coil spring (16)
Thereby, the movable mechanism section (15) is returned to the illustrated state.

[0004]

However, the above-described electromagnetic relay requires the work of mounting the return coil spring (16) and the work of soldering the lead wire (17) at the time of manufacturing, so that the manufacturing process is automated. Can not do it. Moreover, the mounting work of the return coil spring (16) is extremely troublesome, and further, the pair of fixed contacts (5) and the movable contacts (1)
In general, a plurality of sets of contact points, which are a set of 2) and the set of 2), are arranged side by side, so that the lead wire (17) is often soldered, which contributes to an increase in man-hours.

In this type of small electromagnetic relay, the winding thickness of the coil (6) is naturally restricted due to the shape and size of the iron core (8), the yoke (9) and the armature (1).
Since there is a limit to increase the magnetic flux in the closed magnetic circuit formed in 4), there is a problem that the attractive force for the armature (14) is small and it is difficult to obtain high sensitivity.

[0006] Therefore, it is a technical object of the present invention to provide a method of manufacturing an electromagnetic relay capable of achieving automation of an assembling process extremely easily and obtaining high sensitivity.

[0007]

According to the present invention, as a technical means for achieving the above object, an electromagnetic relay is manufactured through the following steps. That is, a base stand having a shape in which a fixed terminal having a fixed contact is provided at an end thereof is formed, and the other end of the movable contact spring plate having one end provided with a movable contact and one end of the lead conductor are electrically connected. The contact unit formed by the above and the operating unit formed by connecting one end portion of the return spring plate to one surface of the armature in a conductive state, and the connecting portion facing each other with a gap therebetween is insert-molded. The movable contact spring plate and the return spring plate are connected in parallel to the armature, and the two units are integrated by a molding resin in an insulated state, and a common terminal is provided at the other end of the lead conductor. A bobbin, a coil, an iron core, and a yoke, which are connected in parallel to the armature to form a movable mechanism section composed of the both units and the common terminal, and in which a coil terminal is integrally projected by insert molding. To form an electromagnetic mechanism part, and the common terminal is inserted into the base table from above to support the movable mechanism part in an upright state on the base table with the movable contact facing the fixed contact. , The electromagnetic mechanism part is moved along the movable mechanism part so that the coil terminal is inserted into the base table and the iron core is fixed on the base table in a facing state to the armature, and the return spring plate is By bending to the electromagnetic mechanism side and engaging the other end with the yoke, the protruding piece from the other surface of the upper end of the armature is joined to the tip upper surface of the yoke and the restoration spring plate is restored. It is characterized in that a step of separating the armature from the iron core by force and separating the movable contact from the fixed contact is performed.

Further, a fixed terminal having a fixed contact at the end,
A base terminal having a shape in which a common terminal having a connecting portion at the end portion and a coil terminal having a connecting terminal portion at the end portion are formed respectively, and a movable contact is provided at one end and the other end of the movable contact spring plate and the lead. A contact unit formed by connecting one end of the conductor in a conductive state and an actuation unit formed by connecting one end of the return spring plate to one surface of the armature are made to face each other with a gap therebetween. By insert-molding the facing portion, the movable contact spring plate and the return spring plate are continuously connected to one surface side of the armature, and the two units are integrated by a molding resin in an insulated state to form a movable mechanism part. And a bobbin having a coil connection terminal portion projecting, a coil, an iron core, and a yoke are integrated to form an electromagnetic mechanism portion, and the other end portion of the lead conductor is joined and fixed to the connection portion from above. To do The movable mechanism is supported by the movable contact in an upright state on the base stand with the movable contact facing the fixed contact, and the electromagnetic mechanism is mounted on the base stand from the side. The engaging projection from the tip of the yoke is engaged with the locking notch at the upper end of the armature, and the coil connection terminal is engaged with the connection terminal in a conductive state, and the electromagnetic mechanism is The iron core is fixed on the base table in a state of facing the armature, the return spring plate is bent toward the electromagnetic mechanism portion, and the other end is attached to the yoke, and the restoring force of the return spring plate. Then, the armature may be separated from the iron core, and the movable contact may be separated from the fixed contact.

[0009]

When the coil is energized, the armature is attracted to the iron core and swings around the protruding piece or the locking notch that is pivotally supported by the yoke as a fulcrum, and the movable contact spring integrated with the armature. The plate is also swung in the same direction so that the movable contact is separated from the normally-closed fixed contact and then comes into contact with the normally-open fixed contact. At the time of this excitation operation, in addition to the closed magnetic circuit similar to the existing one consisting of the iron core, yoke and armature, the closed magnetic circuit consisting of the iron core, yoke, return spring plate and armature is parallel to the existing closed magnetic circuit. Since it is formed, a large effective magnetic flux is generated without increasing the number of turns of the coil, and the attractive force is significantly increased, so that high sensitivity can be obtained.

In this method of manufacturing an electromagnetic relay, the return spring plate integrally provided in the movable mechanism portion is forcibly bent and is attached to the yoke of the electromagnetic mechanism portion, whereby the return spring plate is attached to the return spring plate. The restoring force that is generated urges the armature in the direction away from the iron core and the movable contact spring plate in the direction in which the movable contact separates from the fixed contact on the normally open side. The return coil spring can be omitted because it can have the same function as the return coil spring.

Further, in the first invention, the movable mechanism portion is integrally provided with a structure in which the movable contact spring plate and the common terminal are electrically connected to each other by the lead conductor, and the common terminal is penetrated through the base. On the other hand, in the second aspect of the invention, the movable mechanism portion is integrally provided with a structure in which one end of the lead conductor is electrically connected to the movable contact spring plate, and the other end portion of the lead conductor is penetrated into the base. It is connected to the fixed common terminal connection. Therefore, in both cases, the work of soldering the lead wire for connecting the existing movable contact spring plate and the common terminal becomes unnecessary. Moreover, since all the constituent elements of the movable mechanism section and the electromagnetic mechanism section are sequentially assembled to the base from above, that is, in the same direction, the assembly process can be extremely easily automated.

[0012]

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. An outline of a manufacturing method according to an embodiment of the present invention will be described. As shown in the exploded perspective views of FIGS. 1 and 2 showing the assembling process of the main constituent elements, a base table (18) which is the main constituent element, an arc. After the barrier (19), the movable mechanism section (20) and the electromagnetic mechanism section (21) are individually manufactured in advance, the arc barrier (1
9), the movable mechanism portion (20) and the electromagnetic mechanism portion (21) are sequentially assembled from above, respectively, and are configured as shown in the perspective view of FIG. 3 and the partially cut vertical sectional view of FIG.

First, the manufacturing procedure of each of the above-mentioned components will be described with reference to FIGS. First, the manufacturing process of the base pedestal (18) will be described with reference to FIG. 5. As shown in FIG. 5 (a), a rectangular flat conductor plate is punched and bent to form a connecting piece (55). To form four fixed terminals (23) connected in series, and these are fixed to each fixed terminal (2) as shown in FIG.
Molded resin part (56) for connecting each fixed terminal (23) by insert-molding each central part of 3) with a thermoplastic resin
After providing, the connection piece (55) is removed by cutting along the line AA, and the fixed terminals (23) are individually separated into an electrically insulated state. These four fixed terminals (23) are connected to the molded resin portion (5
As shown in FIG. 6 (c), four pieces of the insertion holes (24), A main body portion having two insertion holes (25) and fixing holes (48) is molded. Then, the fixed contacts (22) are inserted into the mounting holes at the upper ends of the respective fixed terminals (23) as indicated by the arrows, and fixed by caulking, respectively, as shown in FIG. A base stand (18) having a shape in which a total of eight fixed terminals (23) provided with (22) are penetrated and fixed in a state where two fixed contacts (22) each face each other at a predetermined interval. Is completed.

The arc barrier (19) has, as shown in FIG. 1, three partition wall surfaces (26) arranged in parallel at a predetermined interval, and between them and four side walls each having a substantially inverted L-shape protection. The pieces (27) are formed in respective arranged shapes. Each partition wall surface portion (26) is a pair of fixed contact points (22).
They are arranged in parallel at intervals that can be divided into individual pieces.

The movable mechanism portion (20) is manufactured through the steps shown in FIGS. First, as shown in FIG. 6A, a rectangular phosphor bronze plate is punched to form four lead conductors (30) each having an engaging hole (58) at one end.
The ends of each of the two are connected by a connecting piece (57) to form the connecting hole (58) of each lead conductor (30) as shown on the right side of FIG. The neighboring portions are slightly bent, and the central portions of the lead conductors (30) are bent in a substantially orthogonal direction. On the other hand, as shown on the left side of FIG. 4B, a rectangular phosphor bronze plate is punched to form four movable contact spring plates (29) each having an engaging hole (59) at one end. The other end of each is connected by a connecting piece (60). Then, as shown by arrows, the engaging holes (58) and (59) are positioned so that they are aligned with each other, and the two are joined, and in this state, spot welding is performed to integrate them as shown in FIG. . After that, the connection piece (57) is removed by cutting along the line BB, the lead conductors (30) are individually separated, and the movable contact spring plates (29) and the lead conductors (30) are separated. A contact unit (61) is formed by connecting one end of each of them to a conductive state individually.

Apart from this contact unit (61), FIG.
As shown in (a), an iron piece is punched into a required shape to form an armature (32), while a stainless steel plate having magnetism is punched and bent to form a return spring plate (33). To do. Here, in the armature (32), both upper end portions are stamped from one surface side to form a protruding piece (35), and a pair of through holes (62) are formed at both side central portions of the one surface. In addition, the return spring plate (33) is formed by bending both ends of the main body into a substantially L shape to form a pair of joint mounting pieces (85) and (86), respectively, and at the same time, one joint mounting piece. A pair of mounting holes (37) are formed in (85), and a portion extending from both sides of the joint mounting piece (85) is bent to form a pair of locking pieces (36). In addition, the other joint attachment piece (8
Engagement notches (63) are formed on both sides of 6). And
As shown by the arrow, the through hole (62) and the engagement notch (63) are positioned so that they are aligned with each other, and the other joint attachment piece (86) of the return spring plate (33) is attached to one surface of the armature (32). Joined to the center, and in this state (b)
As shown in (3), an operating unit (64) is created by insert-molding and joining the joint portions of both members with a synthetic resin. The molding resin portion (65) has four protrusions (6
6) is projected.

Next, as shown in FIG. 8 (a), the protrusions (66) are inserted into the overlapping engagement holes (58), (59) of the contact unit (61) to perform mutual positioning. The contact unit (61) and the actuation unit (64) are joined in this state. At this time, the contact unit (61) and the operating unit (64) are joined together in an electrically insulated state by the interposition of the molding resin portion (65). In this joined state, the molded resin part (6
The portion 5) is further integrally molded with resin, and the contact unit (61) and the operating unit (64) are integrally fixed by the molded resin portion (34) as shown in FIG.
Simultaneously with the resin molding, the lead conductor (30) is insert-molded in the vicinity of the other end of each lead conductor (30).
A holding rod (67) made of a molding resin for connecting 0) is formed. The holding rod (67) has a function of preventing the lead conductors (30) from varying. Each movable contact spring plate (29) is mounted by caulking it after inserting the movable contact (28) into the mounting hole at the lower end thereof.

Further, as shown in FIG. 9 (a), the vicinity of each holding rod (67) of each lead conductor (30) is bent downward at a right angle and hung down, and then taken along line CC. The connecting piece (57) is removed by cutting to separate the lead conductors (30) into individual lead conductors (30), and the connecting piece (60) is removed by cutting along the D-D line to obtain the individual movable contact spring plates (29). To separate. On the other hand, a rectangular conductor plate is punched, bent and cut and raised to form four substantially inverted L-shaped common terminals (31) each having one end continuously connected by a connecting piece (68), The respective common terminals (31) are individually joined to the lower end portions of the lead conductors (30) at the other end portions thereof so as to be positioned in parallel with the armature, and the joint portions are spotted. Each is electrically connected by welding or caulking. After that, as shown in FIG. 7B, the connecting piece (6
8) is removed and each common terminal (31) is individually separated, the movable mechanism section (20) having the configuration shown in FIG. 1 is completed.

That is, the movable mechanism portion (20) has four movable contact spring plates (2) each having a movable contact (28) at its lower end.
9), four lead conductors (30) individually connected to the upper end of each movable contact spring plate (29) in an electrically connected state, and the lower end of each lead conductor (30). The four common terminals (31) individually connected to each other, the armature (32), and the joint attachment piece (86) are directly joined to the central portion of one surface of the armature (32) and fixed in an electrically connected state. The return spring plate (33) includes the movable contact spring plate (29) and the return spring plate (33).
The lead conductor (30) and the return spring plate (33) are integrated in parallel with each other in parallel with 2) and electrically insulated from each other.

As shown in FIG. 10 (a), the electromagnetic mechanism portion (21) is insert-molded with a pair of conductors (42) of synthetic resin to form a bobbin (38) having a desired shape. ), A connecting terminal (43) is extended from each upper end of a pair of conductors (42 shown in FIG. 1) embedded in each of the (42), and a coil terminal (44) is integrally extended from the lower end of each conductor (42). Each conductor (4
The coil connection terminal (45) is led out to the side integrally from the vicinity of the upper end of 2). Then, a rotating shaft (not shown) is inserted into the iron core insertion hole (69) at the center of the bobbin (39) to automatically wind the coil (39) while rotating the bobbin (38). Next, as shown in FIG. 2B, both coil connection terminals (45) are bent at right angles to the coil (39) side, and the winding start end of the coil (39) is attached to each coil connection terminal (45). And the end of winding are respectively connected, and the coil (39)
Is connected to each coil terminal (44) through the conductor (42). The lower bobbin (3) of each conductor (42) is
The part derived from 8) is bent twice so as to have an inverted L-shape. After that, the iron core (40) is inserted into the iron core insertion hole (69). In the figure, a direct-current iron core (40) is shown, and in the case of alternating current, an iron core having a Kumatri coil fixed at its tip by caulking is used. And the yoke (4
In 1), a pair of engaging notches (50) are formed on both sides near the tip of the upper horizontal piece, and a screw hole (49) is formed in the lower protruding portion, and the upper horizontal piece of the yoke (41) is formed. After being fitted between the flange portions on both sides of the bobbin (38), the iron core (40) is inserted through the insertion hole (69) of the bobbin (38),
When fixed to the yoke (41) by caulking, the electromagnetic mechanism portion (21) having the configuration shown in FIG. 2 is completed. The connection terminal (43) is connected to a display unit (46) that lights and displays the energized state of the coil (39).

Next, a procedure for assembling the base table (18), the arc barrier (19), the movable mechanism section (20) and the electromagnetic mechanism section (21) manufactured as described above will be described. 1, the base (18)
The arc barrier (19) is positioned and placed on the upper surface of the partition wall (26) so as to partition each fixed contact (22) into two pairs, and the movable mechanism section (20).
The respective common terminals (31) are inserted into the respective insertion holes (24) of the base table (18) from above and are held in a substantially upright state on the base table (18) as shown in FIG. At this time, since the center of gravity exists on the arc barrier (19) side, the force that tends to tilt in the same direction acts on the movable mechanism section (20) in the upright state, but as clearly shown in FIG. A holding rod (67) made of a molding resin formed by insert molding so as to connect a part of each of the lead conductors (30) comes into contact with the vertical portion of the protective piece (27) of the arc barrier (19), and Is positioned such that the inverted L-shaped bent portion of the lead conductor (30) is along the bent portion of the protective piece portion (27) of the arc barrier (19), and the movable mechanism portion (20) does not fall down. Maintained in the installed state.

Next, as shown in FIG. 2, the electromagnetic mechanism (2
1) The coil terminal (44) is inserted through each insertion hole (25) while lowering 1) toward the upper surface of the base table (18) along the movable mechanism section (20) in the standing state, and the base table (1
8) Place on top. At this time, since the movable mechanism portion (20) is erected substantially vertically to the base table (18), the base table (in order to insert each coil terminal (44) into each insertion hole (25) ( It does not hinder the movement of the electromagnetic mechanism (21) that descends in the direction perpendicular to 18). Then, the electromagnetic mechanism portion (21) mounted on the base table (18)
Is fixed to the base pedestal (18) by inserting the screw (47) from below into the fixing hole (48) of the base pedestal (18) and screwing it into the screw hole (49) of the yoke (41). .

After that, when the return spring plate (33) is forcibly curved in the direction of the electromagnetic mechanism (21) side, the armature (32) slightly tilts in the same direction and the protruding piece (3) thereof is tilted.
5) is joined to the upper surface of the tip of the yoke (41) as shown in FIG. 4, the movable contact spring plate (29) is also tilted in the same direction, and the movable contact (28) is a fixed contact (22) on the normally closed side. ) Contact. Then, the joint mounting piece (8) of the return spring plate (33) is
5) is joined to the upper surface of the yoke (41), and the pair of locking pieces (36) are engaged with the engaging notches (50) on both sides of the yoke (41), and The mounting hole (37) of the return spring plate (33) is fitted into the protrusion (52). The protrusion (52) has a role of positioning the yoke (41) of the return spring plate (33) on the horizontal piece, and is assembled in the configuration as shown in FIGS. 3 and 4. Finally, as shown in FIG. 4, when the cover case (53) is covered from above and the lower end thereof is fitted to the base stand (18), the hanging piece (formed on the inner surface of the cover case (53) ( 54) is located close to the armature (32) so as to cover the upper end of the armature (32) to prevent the protruding piece (35) from floating or falling off from the upper surface of the tip of the yoke (41).

As described above, by the process of forcibly bending the return spring plate (33) into a curved shape and connecting the end portion to the yoke (41), the restoring force generated in the return spring plate (33) causes the armature ( 32) is rotationally biased in a direction away from the iron core (40), and the movable contact spring plate (29) is moved to the movable contact (2).
Since 8) urges the fixed contact (22) on the normally closed side in the direction of contact, a function similar to that of the existing return coil spring (16) shown in FIG. 15 can be obtained. The spring is no longer required and the complicated mounting work is eliminated. Further, the movable mechanism portion (20) is integrally provided with a structure in which each movable contact spring plate (29) and each common terminal (31) are individually connected to each other in an electrically connected state by each lead conductor (30). Connect the common terminal (31) to the base (1
Since it is inserted into the insertion hole (24) of 8), the existing lead wire (17) for connecting the movable contact spring plate (13) and the common terminal (3) shown in FIG. 15 is soldered. Is unnecessary. Further, each coil terminal (44) integrally provided on the electromagnetic mechanism portion (21) is provided with a base table (18).
Since it is inserted into each of the insertion holes (25), the lead wire (17) for connecting the existing coil (6) and the coil terminal (4) is also unnecessary. Moreover, all the constituent elements of the arc barrier (19), the movable mechanism portion (20) and the electromagnetic mechanism portion (21) can be sequentially assembled from above, that is, in the same direction with respect to the base table (18), and the return spring plate ( When the armature (32) is bent, the protruding piece (35) of the armature (32) is automatically joined to the upper surface of the tip of the yoke (41) so that the armature (32) can swing about the protruding piece (35) as a fulcrum. This makes it possible to extremely easily automate the assembling process in combination with the fact that the work of attaching the coil spring and the work of soldering the lead wires are unnecessary as described above.

Next, the operation will be described. When the coil (39) is energized through the coil terminal (44), the armature (32) is attracted to the iron core (40) and the protruding piece (3) is drawn.
5) swings to the right in Fig. 4 around the fulcrum, and the amateur (32)
The movable contact spring plate (29) integrated with the movable contact spring plate (29) is also swung in the same direction, and the movable contact (28) is separated from the normally closed side fixed contact (22), and then the right normally open side fixed contact (22). Is touched and switched. At this time, the other end of the return spring plate (33) is provided with the yoke (41) in addition to the closed magnetic circuit similar to the existing one by the iron core (40), the yoke (41) and the armature (32).
The closed magnetic circuit formed by the iron core (40), the yoke (41), the return spring plate (33) and the armature (32) is formed in parallel with the closed magnetic circuit, and the number of turns of the coil (39) is increased. Without this, a large magnetic flux is generated, and the attractive force is remarkably large, so that high sensitivity can be obtained.

11 to 14 show a manufacturing method according to another embodiment of the present invention. FIG. 11 is an exploded view of the manufacturing process for attaching the arc barrier (19) and the movable mechanism part (76) to the base (70). Perspective view, FIG. 12 shows base (70)
Perspective view of the manufacturing process for attaching the electromagnetic mechanism part (81) to the
FIG. 13 is a partially removed perspective view of the assembled state, and FIG. 14 is a partially cut vertical sectional view of the assembled state. In these figures, the same or equivalent members as those of the embodiment shown in FIGS. 1 to 10 are designated by the same reference numerals for the sake of simplification of the description and easy understanding. Next, only differences from the above-described embodiment will be described.

As shown in FIGS. 11 and 12, the base pedestal (70) is different from the above embodiment, in addition to each fixed terminal (23), each common terminal (71) and each coil terminal (72). Is also fixed in advance through insert molding. A connection portion (73) formed by bending the upper end portion of each common terminal (71) in the orthogonal direction is exposed on the surface of the base table (70), and the base table (7) of each coil terminal (72) is exposed.
0) A bifurcated connecting terminal portion (74) is formed on the upper end portion projecting upward. In addition, a groove-shaped holding recess (75) is formed in the main body made of molded resin along the connecting portion (73) of each common terminal (71).

Explaining the difference of the movable mechanism part (76) from the above embodiment, as shown in FIGS. 11 and 12, each lead conductor (30) is bent horizontally in the vicinity of the lower end thereof. A connection end (77) that is joined to the connection part (73) of each common terminal (71) is formed at each end, and the vicinity of each connection end (77) is insert-molded with resin. To form a connection support part (78) for connecting the lead conductors (39), and the armature (79).
Further, a pair of locking notches (80) are formed on both sides of the upper end portion in place of the projecting piece (35) of the above embodiment. The manufacturing procedure is almost the same as that of the above embodiment. The return spring plate (33) is slightly bent before assembly, as shown in FIGS. 11 and 12.

Explaining the difference of the electromagnetic mechanism portion (81) from the above-mentioned embodiment, as shown in FIG. 12, the yoke (82) is attached to the support projection piece (83) from both ends of the upper horizontal piece.
Connection terminals (84) horizontally protruding toward the coil (39) side from the lower end leading portions of the two conductors (42) embedded in the bobbin (38) by insert molding. Are formed respectively.

At the time of assembly, as shown in FIG. 11, the arc barrier (19) is placed on the upper surface of the base table (70) in the same manner as in the above-mentioned embodiment, and the connection support portion (78) is held. The movable mechanism portion (76) is inserted into the recess (75) from above and the movable mechanism portion (76) is held upright on the base stand (70) as shown in FIG. At this time, each common terminal (72)
Since each connecting portion (73) of each of the lead conductors (30) is joined to each connecting end portion (77) of each lead conductor (30), the joint portion is spot welded to each connecting portion (73) and each connecting end portion (77). 7
Fix 7) to each other. After that, the electromagnetic mechanism part (81)
Close to the upper surface of the base (70),
Slightly rearward from the mounting position on the base (70) (Fig. 12).
By moving the supporting projections (83) through the locking notches (80) so as to rotatably support the armature (79) and moving the conductor to the front side. Connect each connection terminal portion (84) of (42) to the connection terminal portion (7
The coil (39) is connected to the coil terminal (72) by caulking after being inserted into 4). In this embodiment, since the electromagnetic mechanism (81) is not provided with the common terminal or the coil terminal, the electromagnetic mechanism (81) is moved to the front side from the position displaced rearward with respect to the base (70). The return spring plate (33) can be bent in advance as described above by an amount corresponding to the movement of the electromagnetic mechanism portion (81). After that, the electromagnetic mechanism part (81) is fixed by the screw (47) to the base stand (7).
0), and finally, the cover case (53) is covered from above and the lower end of the cover case (53) is fitted to the base stand (70).

Also in this embodiment, the return spring plate (3
By the process of forcibly bending 3) and engaging its end with the yoke (82), the restoring force generated in the return spring plate (33) causes the armature (79) and the movable contact spring plate (2).
The existing return coil spring is unnecessary by urging the rotating member 9), and when the movable mechanism portion (76) is attached to the base stand (70), the movable contact spring plate (2
9) the lead conductor (30) connected to the base stand (70)
Is connected to the common terminal (71) integrated with the base table (70), and when the electromagnetic mechanism section (81) is attached to the base table (70), the connection terminal section (84) of the conductor (42) is connected to the base table (70). ) Is connected to the connection terminal portion (74) of the common terminal (71) which is integrated with (1), the soldering work of the lead wire is unnecessary. Further, also in this embodiment, all the constituent elements of the arc barrier (19), the movable mechanism portion (76) and the electromagnetic mechanism portion (81) can be sequentially assembled from the upper side to the base stand (70), and the assembling process is performed. Can be very easily automated. Furthermore, the return spring plate (33) and the armature (79) and yoke (82).
Since and are magnetically connected, two closed magnetic paths similar to those in the above-described embodiment are formed in parallel, and the same operation and effect as those in the above-described embodiment can be obtained.

[0032]

As described above, according to the method of manufacturing an electromagnetic relay of the present invention, the return spring plate of the movable mechanism portion is forcibly bent and is attached to the yoke of the electromagnetic mechanism portion. The restoring force generated in the return spring plate urges the armature of the movable mechanism portion in the direction away from the iron core, and the movable contact spring plate in the direction in which the movable contact leaves the fixed contact on the normally open side. Therefore, the existing return coil spring is not required, and the complicated mounting work for the coil spring is eliminated.

Further, a mechanism in which a movable contact spring plate and a common terminal are electrically connected to each other by a lead conductor is provided integrally with the movable mechanism section, and the common terminal is penetrated into the base stand to move the movable mechanism section to the base stand. Or a mechanism in which one end of the lead conductor is connected to the movable contact spring plate in an electrically connected state is integrally provided in the movable mechanism part, and the connection end of the lead conductor is connected to the upper end of the common terminal integrated with the base. By adopting the process of joining and connecting the movable mechanism part to the base base by joining and connecting to the connection part, the existing lead wire for connecting the movable contact spring plate and the common terminal is not required, and the soldering work of this is possible. Will be resolved. Moreover, in addition to the need for the lead wire and the return coil spring described above, all the components of the movable mechanism section and the electromagnetic mechanism section can be sequentially assembled from above, that is, in the same direction with respect to the base table. Can be very easily automated.

Further, in the movable mechanism, one end of the movable mechanism is connected to the armature in a conductive state, and the return spring plate is curved so as to be engaged with the yoke in a conductive state. , A closed magnetic circuit including an iron core, a yoke, a return spring plate and an armature can be formed in parallel with the closed magnetic circuit, a large effective magnetic flux can be generated without increasing the number of turns of the coil, and the attraction force is remarkably large. Because,
High sensitivity can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a manufacturing process of attaching an arc barrier and a movable mechanism portion to a base table according to a manufacturing method of an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a manufacturing process of attaching the electromagnetic mechanism portion to the base table.

FIG. 3 is a perspective view of the same as above, in which a partially assembled state is removed.

FIG. 4 is a partially cut vertical cross-sectional view showing a state where the assembling is completed.

5A to 5C are perspective views sequentially showing a manufacturing process of the base table.

6A to 6C are perspective views sequentially showing a manufacturing process of the contact unit in the movable mechanism section of the above.

7 (a) and 7 (b) are perspective views sequentially showing the manufacturing process of the operation unit in the movable mechanism section of the above.

8A and 8B are perspective views showing a manufacturing process of integrating the contact unit and the operating unit, respectively, in the same.

9A and 9B are perspective views sequentially showing a final manufacturing process of the above movable mechanism portion.

10A and 10B are perspective views sequentially showing a manufacturing process of the electromagnetic mechanism portion of the above.

FIG. 11 is an exploded perspective view showing a manufacturing process of attaching the arc barrier and the movable mechanism portion to the base table according to the manufacturing method of another embodiment of the present invention.

FIG. 12 is an exploded perspective view showing the manufacturing process of attaching the electromagnetic mechanism portion to the base, as above.

FIG. 13 is a perspective view of the same as above with a part of the assembly completed state removed.

FIG. 14 is a partially cut vertical cross-sectional view showing a state where the assembling is completed.

FIG. 15 is a schematic vertical sectional view of a conventional electromagnetic relay.

[Explanation of symbols]

 18,70 Base stand 20,76 Movable mechanism part 21,81 Electromagnetic mechanism part 22 Fixed contact 23 Fixed terminal 28 Movable contact 29 Movable contact spring plate 30 Lead conductor 31,71 Common terminal 32,79 Armature 33 Return spring plate 35 Projecting piece 38 bobbin 39 coil 40 iron core 41, 82 yoke 44, 72 coil terminal 61 contact unit 64 actuation unit 65 molded resin part 73 common terminal connection part 74 coil terminal connection terminal part 83 support protrusion 84 coil connection terminal part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masayuki Shibue 1-10-40 Mikuni Honcho, Yodogawa-ku, Osaka-shi Izumi Electric Co., Ltd. (72) Toshiyuki Kasama 1-10-40 Mikunihonmachi, Yodogawa-ku, Osaka No. Izumi Electric Co., Ltd. (72) Inventor Mitsugu Chiho 1-10-40 Mikunihonmachi, Yodogawa-ku, Osaka City Izumi Electric Co., Ltd.

Claims (2)

[Claims] 1. A base stand having a shape in which a fixed terminal having a fixed contact is provided at an end thereof, and a movable contact is provided at one end of the movable contact spring plate, and the other end of the lead conductor is electrically connected to the other end. A contact unit formed by connecting the connecting parts in a state and an actuating unit formed by connecting one end of the return spring plate to one surface of the armature in a conductive state, the connecting parts facing each other with a gap therebetween. By insert molding, the movable contact spring plate and the return spring plate are connected in parallel to the armature, and the two units are integrated by a molding resin in an insulated state, and the other end of the lead conductor is common. A bobbin having a coil terminal integrally projected by insert molding, a coil, and an iron core by connecting the terminals in parallel to the armature to form a movable mechanism section by the both units and the common terminal. And a yoke are integrated to form an electromagnetic mechanism, and the common terminal is inserted into the base from above and the movable contact stands upright on the base with the movable contact facing the fixed contact. Supported in a state, the electromagnetic mechanism portion, while moving along the movable mechanism portion, the coil terminal is inserted into the base table, the iron core is fixed on the base table in a facing state to the armature,
By bending the return spring plate toward the electromagnetic mechanism portion and engaging the other end with the yoke, a protruding piece from the other surface of the upper end of the armature is joined to the tip upper surface of the yoke, and A method of manufacturing an electromagnetic relay, wherein the armature is separated from the iron core by the restoring force of the return spring plate, and the movable contact is separated from the fixed contact. 2. A base pedestal having a shape in which a fixed terminal having a fixed contact at an end, a common terminal having a connection at the end, and a coil terminal having a connection terminal at the end are formed, respectively, and one end is formed. The contact unit is formed by connecting the other end of the movable contact spring plate and one end of the lead conductor in a conductive state, and the return spring plate is connected in a conductive state to one surface of the armature. With the formed operating unit,
The movable contact spring plate and the return spring plate are continuously connected to one surface side of the armature and are formed by molding resin by insert-molding the facing parts in which the respective connecting parts face each other with a gap. The unit is integrated in an insulated state to form a movable mechanism section, and the bobbin projecting the coil connection terminal section, the coil, the iron core, and the yoke are integrated to form an electromagnetic mechanism section, and the other end of the lead conductor is formed. Is fixed to the connection portion by joining the movable mechanism portion from above, the movable mechanism portion is supported on the base stand while the movable contact portion faces the fixed contact portion, and the electromagnetic mechanism portion is laterally supported. From the end of the yoke to the engaging notch in the upper end of the armature, and the coil connecting terminal portion to the connecting terminal portion. Engage with the electromagnetic The structure is fixed on the base table with the iron core facing the armature, the return spring plate is bent toward the electromagnetic mechanism, and the other end is electrically connected to the yoke. A method for manufacturing an electromagnetic relay, wherein the armature is separated from the iron core by a restoring force of a return spring plate, and the movable contact is separated from the fixed contact.