JP2007200579A - Structure for switching contact - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for switching contact, capable of changing the number of a-contacts and b-contacts, by making thickness of a fixed side complex caulking part the same as that of a movable side complex caulking part at respective switching contacts, without increasing the kinds of base. <P>SOLUTION: The thickness of a fixed side support part 34 is same with that of a movable side support part. The depth of a spring-mounting part 34A is made to be same with a length obtained, by subtracting the thickness of a movable spring 39 from that of a fixed spring 35. A protrusion part for caulking 34B is inserted into a hole part for caulking 39B, by arranging the fixed spring 35 along the spring-mounting part 34A, and the fixed side complex caulking part 34F is formed by caulking the protrusion part for caulking 34B. A protrusion part for caulking 38B is inserted into a hole part for caulking 39B, by arranging the movable spring 39 along a face part of the movable holding part 38, and the movable side complex caulking part 38F is formed, by caulking the protrusion part for caulking 38B. The thickness of the fixed side complex caulking part 34F is made the same as that of the movable side complex caulking part 38F. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an open / close contact structure used in a multipolar electromagnetic relay having a plurality of open / close contacts.

  In general, a multi-pole type electromagnetic relay has a plurality of switching contacts, for example, a 6-pole switching contact in one package, and the configuration of the switching contacts is a contact and b contact. Of the switching contacts, 5 poles are a contacts and 1 pole is a b contact, and when 4 switching contacts are in one package, 3 poles are a contacts and 1 pole is a b contact. Configured and so on. In order to realize such an open / close contact structure of a multipolar electromagnetic relay, the numbers of the a contact and the b contact are switched. The contact a is an open / close contact in which the fixed terminal is arranged to face the right and the movable terminal to the left, for example, and the contact b is an open / close in which the fixed terminal is arranged to the left and the movable terminal is arranged to the right. It is a contact point.

  Electromagnetic relays are becoming smaller year by year, and the electromagnetic block that generates the actuation force (attraction force) that opens and closes each open / close contact is also forced to downsize, and each open / close contact can be opened and closed with a small actuation force (suction force). In order to achieve this, the plate thickness of the movable spring of the movable terminal of each switching contact and the fixed spring of the fixed terminal are changed, and the plate thickness of the movable spring is made thinner than the fixed spring.

  Further, in each open / close contact in the electromagnetic relay, since the arrangement of the terminal support portions of the fixed terminals and the movable terminals is complicated, as shown in FIG. The fixed spring 302 is attached by caulking with a caulking pin 303, and this caulking portion is used as a compound caulking portion 300F. Further, as shown in FIG. 33, in the movable terminal 304, a movable spring 306 is attached to the terminal support portion 305 thereof. The caulking pin 307 is attached by caulking, and this caulking portion is made into a compound caulking portion 304F.

  In this case, the plate thickness of the terminal support portion 301 of the fixed terminal 300 and the plate thickness of the terminal support portion 305 of the movable terminal 304 are the same, and the movable spring 304 is made thinner than the fixed spring 302. Therefore, a difference in thickness occurs between the composite crimped portion 300F on the fixed terminal 300 side and the composite crimped portion 304F on the movable terminal 304 side. Also, from the viewpoint of assembly performance, such as the characteristics of the electromagnetic relay, the structure is such that the combined crimped portions 300F and 304F are press-fitted into a press-fit mounting portion (both not shown) of the cover.

  As a conventional electromagnetic relay of this type, an electromagnet block and a movable block are assembled in a vertical position on a resin-molded cover, and a plurality of switching contacts are mounted in parallel in the front and rear rows in two rows across the partition. And what fixedly inserted the fixed terminal and movable terminal in each switching contact into a cover, and protruded the terminal leg | foot from the surface part of the cover is known (refer patent document 1).

In addition, as a conventional electromagnetic relay of this type, the interior of the housing is partitioned into two switching contact accommodating portions in the vertical direction (for example, in the vertical direction) by a partition wall, and a fixed terminal is movable to the upper switching contact accommodating portion. Two sets of open / close contacts consisting of terminals are arranged in such a manner that the fixed spring of the fixed terminal and the movable spring of the movable terminal are parallel to the partition wall, and the fixed terminal and the movable terminal are press-fitted into the cover to fix the fixed terminal foot. And the movable terminal foot project from the cover, and the lower contact opening / closing contact housing is provided with an open / close contact consisting of a fixed terminal and a movable terminal. There is a configuration in which two sets are arranged in parallel, and the fixed terminal and the movable terminal are pressed into the cover so that the fixed terminal foot and the movable terminal foot protrude from the cover (see Patent Document 2).
Japanese Patent Laid-Open No. 2000-285782 Japanese Patent Laid-Open No. 11-273530

  As described above, in each switching contact in the conventional electromagnetic relay, a difference in thickness occurs between the composite crimped portion 300F on the fixed terminal 300 side and the composite crimped portion 304F on the movable terminal 304 side, and the composite crimped portion 300F. , 304F is press-fitted into the press-fit mounting portion of the cover, and as described above, the number of a-contacts and b-contacts is exchanged in order to realize the open / close contact structure of the required number of poles. In order to do so, a plurality of covers having different press-fitting configurations are required, and there is a problem that the manufacturing cost increases.

  Further, at each open / close contact in the electromagnetic relay, the plate thickness of the terminal support portion 301 of the fixed terminal 300 and the plate thickness of the terminal support portion 305 of the movable terminal 304 are changed, so that the composite crimped portion 300F and the movable terminal on the fixed terminal 300 side are changed. Although there is an idea that the thickness dimensions are the same as the composite caulking portion 304F on the 304 side, the terminal support portions 301 and 305 having different thicknesses are manufactured by punching a lead frame having a constant thickness. The lead frame dedicated to the terminal lead portion of the fixed terminal 300 and the lead frame dedicated to the terminal lead portion of the movable terminal 304 are required, and each lead frame is supplied to a separate processing facility and processed. There was a need.

  Further, when the fixed terminal 300 and the movable terminal 304 are manufactured, the component parts of the fixed terminal 300 are the terminal support portion 301, the fixed spring 302, the caulking pin 303, and the fixed contact 308. In the movable terminal 304, There are four terminal support portions 305, a movable spring 306, a caulking pin 307, and a movable contact 309.

  In this case, since the mold is different at the stage of contact caulking and the cutting, insertion, and press-fitting of the fixed side support part 301 and the movable side support part 305, the parts of the fixed terminal 300 and the movable terminal 304 are supplied individually. However, there was a problem that the number of facilities increased.

  The present invention has been made paying attention to such a situation, and the object of the present invention is to provide the same thickness dimension for the fixed-side composite caulking portion and the movable-side composite caulking portion at each switching contact. Thus, it is possible to provide a switching contact structure that enables exchange of the number of a-contacts and b-contacts and contributes to a reduction in manufacturing cost by reducing the number of terminal mounting members.

  In order to achieve the above object, a switching contact structure according to the present invention has a switching contact composed of a fixed terminal and a movable terminal, and a fixed-side composite in which a fixed spring is joined to a fixed-side support portion of the fixed terminal. The joint portion and the movable side composite joint portion in which the movable spring having a plate thickness smaller than the plate thickness of the fixed spring is joined to the movable side support portion of the movable terminal is used as a press-fit portion to the press-fit mounting portion of the terminal mounting member. In the switching contact structure, the fixed composite joint and the movable composite joint have the same thickness.

  With such a configuration, the fixed-side composite joint portion and the movable-side composite joint portion have the same thickness dimension in each open / close contact, so that, for example, it is necessary to make the press-fit attachment portion of the terminal attachment member the same shape. In order to realize an open / close contact structure of an electromagnetic relay with a large number of poles, when the number of a-contacts and b-contacts is switched, the number of a-contacts and b-contacts can be switched. The number can be reduced and the manufacturing cost can be reduced. Here, for example, a base corresponds to the terminal mounting member.

  The switching contact structure according to the present invention is the above-described switching contact structure according to the present invention, wherein a step portion is formed on the surface portion of the fixed side support portion, and a fixed spring is joined to the step portion to fix the fixed side composite joint portion. Is formed.

  With such a configuration, the fixed side composite joint portion and the movable side composite joint portion can be made to have the same thickness by joining the fixed spring to the stepped portion to form the fixed side composite joint portion.

  The switching contact structure according to the present invention is the above-described switching contact structure according to the present invention, in which a fixed spring is fixed to the stepped portion by caulking to form a fixed-side compound crimped portion as a fixed-side compound joint. It is what I did.

  With such a configuration, in each open / close contact, since the fixed-side composite crimped portion and the movable-side composite crimped portion have the same thickness dimension, by making the press-fit mounting portion of the terminal mounting member the same shape, for example, In order to realize the open / close contact structure of an electromagnetic relay with the required number of poles, when the number of contact a and contact b is switched, the number of contact a and contact b can be switched, and the terminal mounting The number of members can be reduced, and the manufacturing cost can be reduced.

  Further, the switching contact structure according to the present invention is the above-described switching contact structure according to the present invention, wherein the stepped portion is provided with a caulking projection, the fixing spring is provided with a caulking hole, and the stepping portion is fixed spring. The caulking projection is inserted into the caulking hole and the caulking projection is caulked to form a fixed-side compound caulking portion.

  With such a configuration, by inserting a caulking projection into the caulking hole along the fixing spring along the stepped portion, and configuring the fixed-side compound caulking portion by caulking the caulking projection, This fixed side compound crimp part and the movable side compound crimp part can be made into the same thickness dimension.

  In the switching contact structure according to the present invention, the stepped portion and the caulking projection are integrally molded in the switching contact structure according to the present invention described above.

  Such a configuration eliminates the need for a caulking pin as a separate part, and eliminates the need for supplying the caulking pin and inserting it into the fixed side support portion (movable side support portion) and the fixed spring (movable spring). There are no molds required for work, and the number of equipment can be reduced.

  The switching contact structure according to the present invention is the above-described switching contact structure according to the present invention, wherein a fixed spring is fixed to the step portion by welding to form a fixed-side composite joint, and the movable-side support of the movable terminal A movable spring is fixed to the part by welding to form a movable side composite joint.

  With this configuration, the fixed side composite joint portion and the movable side composite joint portion can be made to have the same thickness by fixing the fixed spring to the step portion by welding to form the fixed side composite joint portion. Here, the welding corresponds to, for example, leather welding or spot welding.

  Further, the switching contact structure according to the present invention is the above-described switching contact structure according to the present invention, wherein the plate thickness of the fixed side support portion and the plate thickness of the movable side support portion are the same dimension, and the depth dimension of the stepped portion. Is a value obtained by subtracting the plate thickness of the movable spring from the plate thickness of the fixed spring.

  With this configuration, the fixed side support portion and the movable side support portion have the same thickness, so that the fixed side support portion and the movable side support portion can be punched with one lead frame. The number of processing steps can be reduced, and the manufacturing cost can be reduced.

  According to the switching contact structure according to the present invention, in each switching contact, the fixed-side composite joint and the movable-side composite joint have the same thickness dimension, and the press-fit mounting portion of the terminal mounting member has the same shape. For example, when the number of a-contacts and b-contacts is switched in order to realize a switching contact structure of an electromagnetic relay having the required number of poles, the number of a-contacts and b-contacts can be switched in the terminal mounting member. Thus, the number of terminal mounting members can be reduced, and the manufacturing cost can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a perspective view of an electromagnetic relay having a switching contact structure according to the present invention, FIG. 2 shows a perspective view seen from the lower surface side, and FIG. 3 shows a perspective view of an exploded state thereof. . In the description of the embodiment of the present invention, the front-rear direction, the left-right direction, and the up-down direction are set as shown for convenience.

  As shown in FIG. 3, the electromagnetic relay includes a cover 1 that is resin-molded long in the left-right direction and narrow in the front-rear direction, a base 2 that is a terminal mounting member disposed on the cover 1, and a base 2 that is The switching contact structure A according to the present invention assembled over the steps, the card 5 as a switching body for switching the switching contacts that can linearly reciprocate in the left-right direction, which is the longitudinal direction of the base 2, and the longitudinal direction of the cover 1 The electromagnet block 6 assembled to the left end portion, which is one side end portion, and the fulcrum along the vertical direction that is perpendicular to the cover 1 are supported so as to be rotatable around the electromagnet block 6. In addition, a movable block 7 for driving the card and a case 8 that is externally fitted to the cover 1 are provided.

  The switching contact structure A according to the present invention includes multi-pole upper and lower switching contacts 3 and 4, and the base 2 and the upper and lower switching contacts 3 and 4 constitute a terminal unit U.

  As shown in FIG. 8, the upper and lower switching contacts 3 and 4 are arranged in parallel in the left-right direction (the moving direction of the card 5), and the upper switching contacts 3 as the second switching contacts are as follows. Three pole contacts, that is, first, third, and fifth contacts 3A, 3B, and 3C arranged in parallel on the left and right, and the leftmost first contact 3A is a set of normally closed circuits (normally closed contacts) (b The center and right end contacts, that is, the third and fifth contacts 3B and 3C constitute two sets of normally open circuits (normally open contacts) (a contacts). The lower-stage switching contact 4 that is the first-stage contact is a three-pole contact, that is, the second, fourth, and sixth contacts 4A, 4B, and 4C arranged in parallel on the left and right. A circuit (a contact) is configured.

  As shown in FIGS. 8 and 9, the first contact 3A of the upper switching contact 3 is composed of the first fixed terminal 20A and the first movable terminal 21A, and the third contact 3B is the third fixed terminal 20B. The fifth movable terminal 21B is constituted by the third movable terminal 21B, and the fifth contact 3C is constituted by the fifth fixed terminal 20C and the fifth movable terminal 21C.

  Further, as shown in FIGS. 8 and 23, the second contact 4A in the lower switching contact 4 is composed of a second fixed terminal 22A and a second movable terminal 23A, and the fourth contact 4B is a fourth fixed terminal. 22B and the fourth movable terminal 23B, and the sixth contact 4C is composed of the sixth fixed terminal 22C and the sixth movable terminal 23C.

  Further, as shown in FIGS. 10 to 12, in the first contact 3A, the first fixed terminal 20A includes a fixed-side support portion 34 and a fixed spring 35 fixed to the fixed-side support portion 34 by caulking. The fixed contact 36 is fixed to the tip of the fixed spring 35, and a fixed terminal foot 37 is provided on the front side of the fixed support 34. In FIG. 10, the movable contact 40 of the first movable terminal 21 </ b> A is shown separated from the fixed contact 36.

  In this case, as shown in FIGS. 13 and 14, the inner surface 34a of the fixed-side support portion 34 is a stepped portion having a depth dimension h that is thinner than other portions of the fixed-side support portion 34 and is 0.13 mm. A spring mounting portion 34A is formed, and a caulking projection 34B is provided on the upper and lower surfaces of the spring mounting portion 34A. As shown in FIG. 15, a mounting portion 35A is formed at the base of the fixed spring 35, and caulking holes 35B are formed in the mounting portion 35A in the vertical direction.

  Then, the mounting portion 35A is placed along the spring mounting portion 34A, the caulking projection 34B is inserted into the caulking hole 35B, and the caulking projection 34B is caulked to fix the fixed side support portion 34 to the fixed spring. 10 to 12, a fixed-side compound caulking portion 34F is formed as a press-fit portion and as a fixed-side compound joint portion, as shown in FIGS.

  As shown in FIG. 17, the first movable terminal 21A of the first contact 3A includes a movable side support portion 38, a movable spring 39 fixed to the movable side support portion 38 by caulking, and the movable spring 39. The movable contact 40 is fixed to the distal end of the movable terminal, and a movable terminal foot 41 is provided on the front side of the movable support 38.

  In this case, as shown in FIGS. 17 and 18, a spring mounting portion 38A is formed on the inner surface 38a of the movable side support portion 38, and a caulking projection 38B is vertically formed on the surface portion of the spring mounting portion 38A. Is protruding. Further, as shown in FIG. 18, a mounting portion 39A is formed at the base of the movable spring 39, and a caulking hole 39B is formed at the top and bottom of the mounting portion 39A.

  Then, the mounting portion 39A is placed along the spring mounting portion 38A, the caulking projection 38B is inserted into the caulking hole 39B, and the caulking projection 38B is caulked to move the movable spring to the movable side support portion 38. 39 is attached, and as shown in FIG. 17, a movable side compound crimping portion 38 </ b> F which is a press-fit portion and serves as a movable side composite joint portion is formed.

  As described above, the plate thickness (t1 = 0.5 mm) (see FIG. 13) of the fixed side support portion 34 and the plate thickness (t2 = 0.5 mm) (see FIG. 18) of the movable side support portion 38 have the same dimensions. The depth h of the spring mounting portion 34A, which is a stepped portion, varies from the plate thickness of the fixed spring 35 (t3 = 0.25 mm) (see FIG. 16) to the plate thickness of the movable spring 39 (t4 = 0.12 mm) ( 18), and the depth h of the spring mounting portion 34A is 0.13 mm (see FIG. 14). Therefore, the fixed spring 35 is fixed by the fixed-side support portion 34 of the first fixed terminal 20A. The thickness dimension (t5 = 0.62 mm) (see FIG. 11) of the fixed-side compound swaged portion 34F obtained by crimping the mounting portion 35A is attached to the movable spring 39 by the movable-side support portion 38 of the first movable terminal 21A. Thickness dimension (t6 = 0.6) of the movable side complex crimped portion 38F with the portion 39A crimped mm) (which is the same as the reference to FIG. 17).

  As shown in FIG. 19, the third fixed terminal 20B of the third contact 3B includes a fixed-side support portion 24, a fixed spring 25 fixed to the fixed-side support portion 24 by caulking, and the fixed spring 25. The fixed contact 26 fixed to the front end of the fixed terminal 26 is provided, and the fixed terminal foot 27 is provided on the front side of the fixed support 24.

  In this case, as shown in FIG. 21, on the inner surface 24a of the fixed side support portion 24, the spring mounting is a step portion whose depth dimension h is 0.13 mm which is thinner than the other portions of the fixed side support portion 24. A portion 24A is formed, and a caulking projection 24B is provided on the upper and lower surfaces of the spring mounting portion 24A. Further, a mounting portion 25A is formed at the base of the fixed spring 25, and a caulking hole 25B is formed in the mounting portion 25A vertically.

  Then, as shown in FIG. 20, the mounting portion 25A is placed along the spring mounting portion 24A, the caulking projection 24B is inserted into the caulking hole 25B, and the caulking projection 24B is fixed by caulking. A fixed spring 25 is attached to the side support portion 24 to form a fixed-side compound crimped portion 24F that is a press-fit portion and serves as a fixed-side composite joint portion.

  As shown in FIG. 19, the third movable terminal 21 </ b> B of the third contact 3 </ b> B includes a movable support 30, a movable spring 31 fixed to the movable support 30 by caulking, and the movable spring 31. A movable contact 32 fixed to the tip of the movable terminal 32 is provided, and a movable terminal foot 33 is provided on the front side of the movable support 30.

  In this case, as shown in FIG. 22, a spring mounting portion 30A is formed on the inner surface 30a of the movable side support portion 30, and a caulking projection portion 30B projects vertically on the surface portion of the spring mounting portion 30A. It is. A mounting portion 31A is formed at the base of the movable spring 31, and a caulking hole portion 31B is formed at the top and bottom of the mounting portion 31A.

  Then, the mounting portion 31A is placed along the spring mounting portion 30A, the caulking projection 30B is inserted into the caulking hole 31B, and the caulking projection 30B is caulked to move the movable spring to the movable side support portion 30. As shown in FIG. 19, a movable side composite crimped portion 30F is formed as a press-fit portion and as a movable side composite joint portion.

  The fixed spring 25 and the movable spring 31 have different plate thicknesses, and the plate thickness difference is about 0.13 mm. However, as described above, the depth dimension h of the spring mounting portion 24A is 0.13 mm. The thickness dimension (t5 = 0.62 mm) (see FIG. 19) of the fixed-side composite crimped portion 24F obtained by crimping the mounting portion 25A of the fixed spring 25 with the fixed-side support portion 24 of the second fixed terminal 20B is as follows. 3 Same as the thickness dimension (t6 = 0.62 mm) (see FIG. 19) of the movable side complex crimping portion 31F obtained by crimping the mounting portion 31A of the movable spring 31 with the movable side support portion 30 of the movable terminal 21B. Yes.

  Further, as shown in FIG. 19, the fifth contact 3C has the same configuration as the fifth contact 3B, and the fifth fixed terminal 20C in the fifth contact 3C has the same configuration as the third fixed terminal 20B. The movable terminal 21C has the same configuration as the third movable terminal 21B. Accordingly, although the same reference numerals are given and description thereof is omitted, the fixed terminal foot portion of the fifth fixed terminal 20C is 27-1, and the movable terminal foot portion of the fifth movable terminal 21C is 33-1.

  In the lower opening / closing contact 4 described above, as shown in FIGS. 23 and 24, the second fixed terminal 22A of the second contact 4A is fixed to the fixed side support portion 42 and the fixed side support portion 42 by caulking. A fixed spring 43 and a fixed contact 44 fixed to the tip of the fixed spring 43 are provided, and a fixed terminal foot 45 is provided on the front side of the fixed side support portion 42.

  In this case, as shown in FIGS. 27 and 28, the inner surface 42a of the fixed-side support portion 42 is a stepped portion having a thickness h that is thinner than other portions of the fixed-side support portion 42 and having a depth dimension 0.13 mm. A certain spring mounting portion 42A is formed, and a caulking projection 42B is vertically provided on the surface of the spring mounting portion 42A. As shown in FIG. 26, a mounting portion 43A is formed at the base of the fixed spring 43, and caulking holes 43B are formed in the mounting portion 43A in the vertical direction.

  Then, the mounting portion 43A is placed along the spring mounting portion 42A, the caulking projection portion 42B is inserted into the caulking hole portion 43B, and the caulking projection portion 42B is caulked to fix the fixed side support portion 42 to the fixed spring. As shown in FIG. 26, 43 is attached to form a fixed-side compound crimped portion 42F which is a press-fit portion and serves as a fixed-side compound joint portion.

  Further, as shown in FIGS. 29 and 30, the second movable terminal 23A of the second contact 4A includes a movable side support portion 46, a movable spring 47 fixed to the movable side support portion 46 by caulking, and this A movable contact 48 fixed to the tip of the movable spring 47 is provided, and a movable terminal foot 49 is provided on the front side of the movable support 46.

  In this case, as shown in FIG. 30, a spring mounting portion 46A is formed on the inner surface 46a of the movable side support portion 46, and a caulking projection portion 46B is vertically provided on the surface portion of the spring mounting portion 46A. It is. Further, a mounting portion 47A is formed at the base of the movable spring 47, and a caulking hole 47B is formed in the mounting portion 47A vertically.

  Then, the mounting portion 47A is aligned with the spring mounting portion 46A, the caulking projection 46B is inserted into the caulking hole 47B, and the caulking projection 46B is caulked to move the movable spring to the movable side support portion 46. 47 is attached, and as shown in FIG. 29, a movable side compound crimping portion 46 </ b> F which is a press-fit portion and serves as a movable side composite joint portion is formed.

  The fixed spring 43 and the movable spring 47 have different plate thicknesses, and the plate thickness difference is 0.13 mm. However, as described above, since the depth dimension h of the spring mounting portion 42A is 0.13 mm, The thickness dimension (t5 = 0.62 mm) (see FIG. 25) of the fixed-side composite crimped portion 42F obtained by crimping the mounting portion 43A of the fixed spring 43 with the fixed-side support portion 42 of the fourth fixed terminal 22A is the second This is the same as the thickness dimension (t6 = 0.62 mm) (see FIG. 25) of the movable-side composite crimped portion 47F obtained by crimping the mounting portion 47A of the movable spring 47 with the movable-side support portion 46 of the movable terminal 23B. .

  Further, as shown in FIGS. 23 and 24, the fourth contact 4B and the sixth contact 4C have the same configuration as the second contact 4A, and in the fourth fixed terminal 22B and the sixth contact 4C in the fourth contact 5B. The sixth fixed terminal 22C has the same configuration as the fourth fixed terminal 22A, and the fourth movable terminal 23B and the sixth movable terminal 23C have the same configuration as the second movable terminal 23A. Accordingly, although the same reference numerals are given and description thereof is omitted, the fixed terminal foot of the fourth fixed terminal 22B is set to 45-1, the fixed terminal foot of the sixth fixed terminal 22C is set to 45-2, and the fourth movable terminal The movable terminal foot portion of 23B is designated 49-1, and the movable terminal foot portion of the sixth movable terminal 23B is designated 49-2.

  And the 1st-6th movable terminal 21A, 23A, 21B, 23B, 21C, 23C has the card latching | locking part 50 in the front-end | tip part (free end part) of each movable spring 31,39,47. .

  As described above, the spring mounting portion 34A (24A, 42A) having a depth h of 0.13 mm is formed on the inner surface 34 (24, 42) of the fixed side support portion 34, and this spring mounting portion 34A (24A, 42A) is formed. ) Is projected on the surface of the fixed portion 34B (38B, 24B, 42B) by performing the stepping process and the projecting process shown in FIG. 42), spring mounting portions 34A (24A, 42A) and caulking projections 34B (24B, 42B) are formed simultaneously on the inner surface 34a (24a, 42a).

  As shown in FIGS. 2 and 3, the cover 1 has a first fixed terminal through hole portion 14A, a third movable terminal through hole portion 14B, and a predetermined interval in the left-right direction which is the longitudinal direction thereof. A fifth movable terminal through-hole portion 14C is formed. Further, the cover 1 is formed with a second fixed terminal through-hole portion 10A, a fourth fixed terminal through-hole portion 10B, and a sixth fixed terminal through-hole portion 10C at predetermined intervals in the left-right direction. Further, cover-side partition walls 11A, 11B, 11C, 11D, 11E, and 11F project from the inner surface 1a of the cover 1, and the second fixed terminal through-hole portion 10A is formed on the front end side of the cover-side partition wall 11D. The fourth fixed terminal through hole 10B is located on the front end side of the cover side partition wall 11E, and the sixth fixed terminal through hole 10C is located on the front end side of the cover side partition wall 11F. Yes.

  Further, notches 12A, 12B, 12C, and 12D are formed at predetermined intervals in the left-right direction of the cover 1 at the rear side edge (one side edge in the short direction) of the cover 1. Further, the cover 1 is formed with coil terminal through holes 15A and 15B at the left end thereof.

  As shown in FIG. 6, the base 2 has a plate-like base body 51 that isolates the upper switching contact 3 and the lower switching contact 4, and a movable body is held on the front side of the base main body 51. A card holding portion 120 is formed, and a block attachment portion 110 is provided at the left end portion of the base main body 51.

  A first contact mounting portion 52A, a third contact mounting portion 52B, and a fifth contact mounting portion 52C are provided on the upper surface portion 51a, which is one surface portion of the base body 51, and these first contact mounting portions 52A. The third contact mounting part 52B and the fifth contact mounting part 52C constitute a second stage switching contact mounting part. Further, the first contact mounting part 52A and the third contact mounting part 52B are partitioned by the partition walls 55 and 56, and the third contact mounting part 52B and the fifth contact mounting part 52C are partitioned by the partition wall 57, An opening 58 is formed between the partition walls 55 and 56 in the base main body 51. A return spring mounting portion 59 is formed at the rear end portion of the opening 58.

  As shown in FIG. 6, the first contact mounting portion 52A includes a first fixed terminal mounting portion 53 and a first movable terminal mounting portion 54, and the first fixed terminal mounting portion 53 and the first movable terminal mounting portion. A partition wall 60 is provided between them. The first fixed terminal mounting portion 53 is provided with a terminal press-fit recess 61 and a fixed terminal insertion hole 62 as a press-fit mounting portion. The first movable terminal mounting portion 54 has a terminal press-fit as a press-fit mounting portion. A recess 63 and a movable terminal insertion hole 64 are provided.

  As shown in FIG. 6, the third contact mounting part 52B includes a third movable terminal mounting part 65 and a third fixed terminal mounting part 66, and the third movable terminal mounting part 65 and the third fixed terminal mounting part. A partition wall 67 is provided between them. The third movable terminal mounting portion 65 is provided with a terminal press-fit recess 68 and a fixed terminal insertion hole 71 as a press-fit mounting portion, and the third fixed terminal mounting portion 66 is a terminal press-fit as a press-fit mounting portion. A recess 70 and a movable terminal insertion hole 69 are provided.

  The fifth contact mounting portion 52C includes a fifth movable terminal mounting portion 72 and a fifth fixed terminal mounting portion 73, and a partition wall is provided between the fifth movable terminal mounting portion 72 and the fifth fixed terminal mounting portion 73. 74 is provided. The fifth movable terminal mounting portion 72 is provided with a terminal press-fit recess 75 as a press-fit mounting portion and a movable terminal insertion hole 76, and the fifth fixed terminal mounting portion 73 has a terminal as a press-fit mounting portion. A press-fit recess 77 and a fixed terminal insertion hole 78 are provided.

  The terminal press-fit recesses 61, 68, and 75 have the same configuration with caulking portion insertion grooves 61a, 68a, and 75a on the right side wall, respectively, and the terminal press-fit recesses 63, 70, and 77 are respectively The left side wall portion has caulking portion insertion grooves 63a, 70a, and 77a, and has the same configuration.

  Further, as shown in FIG. 7, a second contact mounting portion 79A, a fourth contact mounting portion 79B, and a sixth contact mounting portion 79C are provided on the lower surface portion 51b, which is the other surface portion of the base body 51. . The second contact mounting part 79A, the fourth contact mounting part 79B, and the sixth contact mounting part 79C constitute a first stage switching contact mounting part. The second contact mounting portion 79A and the fourth contact mounting portion 79B are partitioned by partition walls 55A and 56A, and the fourth contact mounting portion 79B and the sixth contact mounting portion 79C are partitioned by partition walls 57A.

  Further, as shown in FIG. 7, the second contact mounting portion 79A includes a second fixed terminal mounting portion 82 and a second movable terminal mounting portion 83, and the second fixed terminal mounting portion 82 and the second movable terminal mounting portion. A partition wall 84 is provided between 83 and 83. The second fixed terminal mounting portion 82 is provided with a terminal press-fit recess 85 as a press-fit mounting portion, and the second movable terminal mounting portion 83 is provided with a terminal press-fit recess 86 as a press-fit mounting portion.

  The fourth contact mounting portion 79B includes a fourth fixed terminal mounting portion 87 and a fourth movable terminal mounting portion 88, and a partition wall is provided between the fourth fixed terminal mounting portion 87 and the fourth movable terminal mounting portion 88. 89 is provided. The fourth fixed terminal mounting portion 87 is provided with a terminal press-fit recess 90 as a press-fit mounting portion, and the fourth movable terminal mounting portion 88 is provided with a terminal press-fit recess 91 as a press-fit mounting portion.

  The sixth contact mounting portion 79C includes a sixth fixed terminal mounting portion 92 and a sixth movable terminal mounting portion 93, and a partition wall is provided between the sixth fixed terminal mounting portion 92 and the sixth movable terminal mounting portion 93. 94 is provided. The sixth fixed terminal mounting portion 92 is provided with a terminal press-fit recess 95 as a press-fit mounting portion, and the sixth movable terminal mounting portion 93 is provided with a terminal press-fit recess 96 as a press-fit mounting portion.

  The terminal press-fit recesses 85, 90, and 95 have the same configuration with caulking portion insertion grooves 85a, 90a, and 95a on the left side wall, respectively. Each has a caulking portion insertion groove 86a, 92a, 96a on the right side wall portion, and has the same configuration.

  As shown in FIG. 7, the lower surface 51 b of the base main body 51 has a first terminal holding part 97 having a terminal insertion hole 62 opened and a second terminal holding part having a terminal insertion hole 71 opened. 98 and a third terminal holding part 99 having a terminal insertion hole 76 opened, and a rear edge of the lower surface part 51b of the base body 51 having a terminal insertion hole 64 opened. 4 terminal holding portion 100, fifth terminal holding portion 101 having terminal insertion hole 69 open and holding groove 101a, and sixth terminal holding having terminal insertion hole 78 open and holding groove 102a. A seventh terminal holding part 121 having a part 102 and a holding groove part 121a is projected.

  In the base 2 configured as described above, as shown in FIG. 4, the first fixed terminal 20A is mounted on the first fixed terminal mounting portion 53 of the first contact mounting portion 52A. In this case, the fixed-side composite crimped portion 34F of the fixed-side support portion 34 is press-fitted into the terminal press-fit recess 61, and the fixed terminal foot portion 37 of the first fixed terminal 20A is inserted into the fixed terminal insertion hole 62. Therefore, it protrudes below the base 2.

  As shown in FIG. 4, the first movable terminal 21A is mounted on the first movable terminal mounting portion 54 of the first contact mounting portion 52A. In this case, the movable side complex crimping portion 38F of the movable side support portion 38 is press-fitted into the terminal press-fit recess 63, and the movable terminal foot portion 41 of the first movable terminal 21A is inserted into the movable terminal insertion hole 64. Therefore, it protrudes below the base 2.

  As shown in FIG. 4, the third movable terminal 21B is mounted on the third movable terminal mounting portion 65 of the third contact mounting portion 52B. In this case, the movable side crimping portion 30F of the movable side support portion 30 is press-fitted into the terminal press-fit recess 69, and the movable terminal foot portion 33 of the third movable terminal 21B is inserted into the movable terminal insertion hole 71. Therefore, it protrudes below the base 2.

  As shown in FIG. 4, the third fixed terminal 20B is mounted on the third fixed terminal mounting portion 66 of the third contact mounting portion 52B. In this case, the fixed-side composite crimped portion 24F of the fixed-side support portion 24 is press-fitted into the terminal press-fit recess 70, and the fixed terminal foot portion 27 of the third fixed terminal 20B is inserted into the fixed terminal insertion hole 69. Therefore, it protrudes below the base 2.

  Further, as shown in FIG. 4, the fifth movable terminal 21C is mounted on the fifth movable terminal mounting portion 72 of the fifth contact mounting portion 52C. In this case, the movable-side composite crimped portion 30F of the movable-side support portion 30 is press-fitted into the terminal press-fit recess 75, and the movable terminal foot portion 33-1 of the fifth movable terminal 21C is inserted into the movable terminal insertion hole portion 76. It is inserted and protrudes below the base 2.

  Further, the fifth fixed terminal 20C is mounted on the fifth fixed terminal mounting portion 73. In this case, the fixed-side composite crimped portion 24F of the fixed-side support portion 24 is press-fitted into the terminal press-fit recess 77, and the fixed terminal foot portion 27-1 of the fifth fixed terminal 20C is inserted into the fixed terminal insertion hole portion 78. It is inserted and protrudes below the base 2.

  Further, as shown in FIG. 5, the second fixed terminal 22A is mounted on the second fixed terminal mounting portion 82 of the second contact mounting portion 79A. In this case, the fixed-side compound portion of the fixed-side holding portion 42 is fixed. The fastening portion 42F is press-fitted into the terminal press-fit recess 85, and the fixed terminal foot 45 of the second fixed terminal 22A protrudes below the base 2.

  Further, the second movable terminal mounting portion 83 is mounted with the second movable terminal 23A. In this case, the movable side compound crimping portion 46F of the movable side support portion 46 is press-fitted into the terminal press-fitting recess 86, and the second The movable terminal leg 49 of the two movable terminals 23A protrudes below the base 2 in a state of being held in the holding groove 101a.

  In addition, the fourth fixed terminal 22B is mounted on the fourth fixed terminal mounting portion 87, and in this case, the fixed-side compound crimp portion 42F of the fixed-side support portion 42 is press-fitted into the terminal press-fit recess 90, The fixed terminal legs 45-1 of the fourth fixed terminal 22B protrude below the base 2.

  Further, the fourth movable terminal mounting portion 88 is mounted with the fourth movable terminal 23B. In this case, the movable side complex crimping portion 46F of the movable side support portion 46 is press-fitted into the terminal press-fitting recess 91, and The movable terminal foot portion 49-1 of the four movable terminals 23B protrudes below the base 2 while being held in the holding groove portion 102a.

  Further, the sixth fixed terminal mounting portion 92 is mounted with the sixth fixed terminal 22C, and in this case, the fixed-side compound crimp portion 42F of the fixed-side support portion 42 is press-fitted into the terminal press-fitting recess 95, and The fixed terminal legs 45-2 of the sixth fixed terminal 22C protrude below the base 2.

  Further, the sixth movable terminal foot portion 93 is provided with the sixth movable terminal 23C, and in this case, the movable side complex crimping portion 46F of the movable side support portion 46 is press-fitted into the terminal press-fitting recess 96, The movable terminal foot 49-2 of the six movable terminals 23C protrudes below the base 2 while being held in the holding groove 121.

  In the opening 58 between the partition walls 56 and 57 in the base main body 51, a return spring 103 having a card locking portion 103 </ b> A is disposed at the tip, and this return spring 103 is attached to the return spring attachment portion 59. .

  As shown in FIG. 4, the electromagnet block 6 is attached to the block attaching portion 110, and the movable block 7 is disposed on the bent end side of each yoke 108 of the electromagnet block 6. Is rotatably supported by a fulcrum shaft 115 supported by the block mounting portion 110.

  As shown in FIG. 4, the card 5 is guided and held on the base body 51 of the base 2 by the card holding unit 120 so as to be linearly slidable in the left-right direction. A card locking portion 50 at the tip of each of the movable springs 31, 39, 47 of the movable terminals 21A, 23A, 21B, 23B, 21C, and 23C and a card locking portion 103A at the tip of the return spring 103 are locked. The movable springs 31, 39, 47 are displaced by the reciprocating movement of the card 5 in the left-right direction so that the switching contacts are switched. The card 5 is always given a return force toward the electromagnet block 6 by the elastic force of the return spring 103.

  As described above, the terminal unit U assembled with the electromagnetic block 6, the movable block 7, and the card 5 is attached to the cover 1 as shown in FIG. In this case, as shown in FIG. 2, the first terminal holding portion 97 faces the first fixed terminal through-hole portion 14A of the cover 1, and the fixed terminal foot portion 37 is formed in the first fixed terminal through-hole portion 14A. The second terminal holding portion 98 faces the third movable terminal through hole portion 14B of the cover 1, and the movable terminal foot portion 33 penetrates through the third movable terminal through hole portion 14B, The third terminal holding portion 99 faces the fifth movable terminal through-hole portion 14C of the cover 1, and the movable terminal foot portion 33-1 passes through the fifth movable terminal through-hole portion 14C.

  Further, the fourth terminal holding portion 100 is inserted into the cutout portion 12A of the cover 1, the fifth terminal holding portion 101 is inserted into the cutout portion 12B of the cover 1, and the sixth terminal holding portion. 102 is inserted into the cutout portion 12 </ b> C of the cover 1, and the seventh terminal holding portion 121 is inserted into the cutout portion 12 </ b> D of the cover 1.

  In addition, the fixed terminal legs 45, 45-1, and 45-2 of the second fixed terminal 22A, the fourth fixed terminal 22B, and the sixth fixed terminal 22C are the second fixed terminal through-hole portions 10A and the fourth fixed holes of the cover 1, respectively. The fixed terminal through hole 10B and the sixth fixed terminal through hole 10C are penetrated.

  A case 8 is detachably attached to the cover 1 so as to cover the terminal unit U assembled with the electromagnet block 6, the movable block 7, and the card 5.

  In this case, the electromagnet block 6 and the movable block 7 are arranged so that the virtual axis of the support shaft 115 centering on the fulcrum of the movable block 7 extends vertically with respect to the surface portion of the cover 1, that is, on the cover 1. On the other hand, the fixed springs 25, 35, 43 of the first to sixth fixed terminals 20A, 22A, 20B, 22B, 20C, 22C constituting the upper and lower switching contacts 3, 4 are arranged in a tilted posture. The movable springs 31, 39, 47 of the first to sixth movable terminals 21 </ b> A, 23 </ b> A, 21 </ b> B, 23 </ b> B, 21 </ b> C, 23 </ b> C are also arranged so that their longitudinal directions are parallel to the surface portion of the cover 1, that is, the cover 1. On the other hand, it is arranged so as to fall.

  When the coil 27 is not energized, the movable block 7 is rotated in the clockwise direction by the return force of the return spring 103. As shown in FIG. The first contact 3A is closed, the third contact 3B and the fifth contact 3C are opened, and the lower opening / closing contact 4 is the second contact 4A, the fourth contact 4B, and the sixth contact 4C. Each of them is open.

  When the coil 27 is energized, the movable block 7 rotates counterclockwise against the return force of the return spring 103, and the card 5 is slid leftward. In the upper switching contact 3, the first contact 3A is opened, the third contact 3B and the fifth contact 3C are closed, and the lower switching contact 3 is the first switching contact 3. Each of the 2-contact 4A, the fourth contact 4B, and the sixth contact 4C is closed.

  As described above, according to the embodiment of the present invention, the plate thickness of the fixed side support portions 24, 34, and 42 and the plate thickness of the movable side support portions 30, 38, 46 are the same size, The depth dimension of a certain spring mounting portion 24A, 34A, 42A is a value obtained by subtracting the plate thickness of the movable springs 31, 39, 47 from the plate thickness of the fixed springs 25, 35, 43, and the spring mounting portions 24A, 34A, Insert the caulking protrusions 24B, 34B, and 42B into the caulking holes 25B, 35B, and 43B along the fixing springs 25, 35, and 43, and add the caulking protrusions 24B, 34B, and 42B to 42A. By tightening, the fixed-side compound crimping portions 24F, 34F, and 42F are formed, and the movable springs 31, 39, and 47 are placed along the surface portions of the movable-side support portions 30, 38, and 46, and the crimping protrusions 31B, 38B, and 46B are arranged. Insert into the caulking holes 31B, 39B, 47B The caulking projections 31B, 38B, and 46B are caulked to form the movable side complex caulking portions 30F, 38F, and 46F, and the fixed side caulking portions 24F, 34F, and 42F and the movable side complex caulking portions are formed. Since the fastening portions 30F, 38F, and 46F have the same thickness dimension, it is necessary to make the terminal press-fit recesses (61, 68, 75) and (85, 90, 95) of the base 2 the same shape. When switching the number of contact a and contact b in order to realize the open / close contact structure of an electromagnetic relay with the number of poles, the number of contacts a and contact b can be switched, and the number of bases 2 can be reduced. Manufacturing costs can be reduced.

  In addition, according to the embodiment of the present invention, the plate thickness of the fixed side support portions 24, 34, and 42 and the plate thickness of the movable side support portions 30, 38, 46 are the same size, so that one lead frame Thus, the fixed-side support portions 24, 34, and 42 and the movable-side support portions 30, 38, and 46 can be punched, the number of processing steps can be reduced, and the manufacturing cost can be reduced.

  Further, according to the embodiment of the present invention, the spring mounting portions 24A, 34A, and 42A, which are step portions, and the caulking projections 24B, 34B, and 42B perform the step processing and the extrusion processing in one step. Because it is integrally molded at the same time, there is no need for a caulking pin as a separate part, and it is unnecessary to supply the caulking pin and insert it into the fixed side support part (movable side support part) and the fixed spring (movable spring). Therefore, there is no mold required for these operations, and the number of facilities can be reduced.

  In the above-described embodiment of the present invention, the fixed springs 24A, 34A, and 42A, which are stepped portions, are fixed to the fixing springs 25, 35, and 43 by caulking, and the fixed-side compound crimping portion as the fixed-side compound joint portion. 24F, 34F, 42F are formed, but fixed springs 25, 35, 43 are fixed to the spring mounting portions 24A, 34A, 42A, which are stepped portions, by welding (leather welding, spot welding, etc.) It is possible to form a joint portion, and the movable side composite portion is formed by joining the movable springs 31, 39, 47 to the surface portions of the movable side support portions 30, 38, 46 by welding (leather welding, spot welding, etc.). The joint can be formed, and the fixed-side composite joint and the movable-side composite joint can have the same thickness.

  According to the switching contact structure according to the present invention, in each switching contact, the fixed-side composite joint portion (fixed-side composite crimped portion) and the movable-side composite joint portion (movable-side composite crimped portion) have the same thickness dimension. Therefore, by making the press-fit mounting portion of the terminal mounting member the same shape, for example, in order to realize a switching contact structure of an electromagnetic relay having the required number of poles, the number of a contacts and b contacts is switched. In this case, the number of the a contacts and the b contacts can be exchanged, and the number of terminal mounting members can be reduced and the manufacturing cost can be reduced, and a plurality of switching contacts are provided. This is useful for switching contact structures such as multi-pole electromagnetic relays.

It is a perspective view of an electromagnetic relay. It is the perspective view which looked at the same electromagnetic relay from the lower surface side. It is a perspective view of the disassembled state of the electromagnetic relay. It is a top view of the electromagnetic relay which removed the case and the cover. It is a bottom view of the electromagnetic relay which removed the case and the cover. It is a top view of a base. It is a bottom view of a base. It is the perspective view which looked at the switching contact structure concerning the present invention from the front side. It is the perspective view which looked at the upper stage (second stage) switching contact in the switching contact structure from the back side. It is a perspective view of the 1st contact in the upper stage (2nd stage) switching contact. It is a top view of the 1st contact. It is a perspective view of the fixed terminal in the 1st contact. It is a perspective view of the fixed side support part in the 1st contact. It is a top view of the fixed side support part. It is a perspective view of the fixed spring in the 1st contact. It is a top view of the fixing spring. It is a perspective view of the movable terminal in a 1st contact. It is a perspective view of the decomposition state of the movable terminal. It is a perspective view of the 3rd and 5th contact in an upper stage (second stage) switching contact. It is a perspective view of the fixed terminal of the 3rd and 5th contact. It is a perspective view of the decomposition | disassembly state of the fixed terminal of a 3rd, 5th contact. It is a perspective view of the decomposition | disassembly state of the movable terminal of a 3rd, 5th contact. It is the perspective view which looked at the switching contact of the lower stage (first stage) from the back side. It is a perspective view of the 2nd, 4th, and 6th contact in a lower stage (first stage) switching contact. It is a top view of the said 2nd, 4th, 6th contact. It is a perspective view of the fixed terminal in the said 2nd, 4th, 6th contact. It is a perspective view of the fixed side support part of the fixed terminal. It is a top view of the fixed side support part of the fixed terminal. It is a perspective view of the movable terminal in a 2nd, 4th, 6th contact. It is a perspective view of the decomposition state of the movable terminal. It is explanatory drawing of the shaping | molding process which forms a spring attaching part and the crimping protrusion part in the inner surface of a stationary-side support part. It is a perspective view of the fixed terminal in the conventional switching contact structure. It is a perspective view of the fixed terminal in the conventional switching contact structure.

Explanation of symbols

U terminal unit 1 cover 2 base (terminal mounting member)
3 Upper switching contact (second switching contact)
3A 1st contact 3B 3rd contact 3C 5th contact 4 Lower switching contact (first switching contact)
4A Second contact 4B 4th contact 4C 6th contact 20A 1st fixed terminal 20B 3rd fixed terminal 20C 5th fixed terminal 21A 1st movable terminal 21B 3rd movable terminal 21C 5th movable terminal 22A 2nd fixed terminal 22B 4th Fixed terminal 22C 6th fixed terminal 23A 2nd movable terminal 23B 4th movable terminal 23C 6th movable terminal 24 Fixed side support part 24A Spring attachment part (step part)
24B Caulking projection 24F Fixed side complex caulking part (press-fit part) (fixed side compound joint)
25 fixed spring 25A mounting portion 25B caulking hole 26 fixed contact 27 fixed terminal foot portion 27-1 fixed terminal foot portion 30 movable side support portion 30A spring mounting portion 30B caulking projection portion 30F movable side complex caulking portion ( Press-fit part) (movable composite joint)
31 movable spring 31A mounting portion 31B caulking hole 32 movable contact 33 movable terminal foot portion 33-1 movable terminal foot portion 34 fixed side support portion 34A spring attachment portion (stepped portion)
34B Fixed side crimping protrusion 34F Fixed side crimping part (press-fit part) (fixed side compound joint)
35 fixed spring 35A mounting portion 35B caulking hole 36 fixed contact 37 fixed terminal foot 38 movable side support 38A spring mounting portion 38B caulking projection 38F movable side complex crimping portion (press-fit portion) (movable side complex) Junction)
39 movable spring 39A mounting portion 39B caulking hole 40 movable contact 41A movable terminal foot portion 42 fixed side support portion 42A spring mounting portion (stepped portion)
42B Caulking projection 42F Fixed side complex caulking part (press-fit part) (fixed side compound joint)
43 fixed spring 43A mounting portion 43B caulking hole 44 fixed contact 45 fixed terminal foot 45-1 fixed terminal foot 45-2 fixed terminal foot 46 movable side support portion 46A spring mounting portion 46B caulking projection portion 46F Movable composite crimping part (press-fit part) (movable composite joint)
47 movable spring 47A mounting portion 47B caulking hole 48 fixed contact 49 movable terminal foot 49-1 movable terminal foot 61 terminal press-fit recess (press-fit mounting portion)
68 Terminal press-fit recess (press-fit mounting part)
75 Terminal press-fit recess (press-fit mounting part)
85 Terminal press-fit recess (press-fit mounting part)
90 Terminal press-fit recess (press-fit mounting part)
95 Terminal press-fit recess (press-fit mounting part)

Claims (7)

A fixed composite joint having a switching contact composed of a fixed terminal and a movable terminal, wherein a fixed spring is joined to the fixed support of the fixed terminal; and the fixed spring to the movable support of the movable terminal A switching contact structure in which a movable side composite joint portion joined with a movable spring having a plate thickness size smaller than the plate thickness size is a press-fit portion to a press-fit mounting portion of a terminal mounting member,
The switching contact structure characterized in that the fixed composite joint and the movable composite joint have the same thickness. The switching contact according to claim 1, wherein a step portion is formed on a surface portion of the fixed side support portion, and the fixed spring is joined to the step portion to form the fixed side composite joint portion. Construction. The switching contact structure according to claim 2, wherein the fixed spring is fixed to the stepped portion by caulking to form a fixed-side compound caulking portion as the fixed-side compound joint portion. A caulking protrusion is provided on the stepped portion, a caulking hole is provided on the fixing spring, and the caulking protrusion is placed on the caulking hole along the fixing spring along the stepped portion. 4. The switching contact structure according to claim 3, wherein the fixed-side composite crimped portion is formed by inserting and crimping the crimping protrusion. The switching contact structure according to claim 4, wherein the stepped portion and the caulking projection are integrally molded. The fixed spring is fixed to the stepped portion by welding to form the fixed composite joint, and the movable spring is fixed to the movable support by welding to form the movable composite joint. The switching contact structure according to claim 2, wherein The plate thickness of the fixed side support portion and the plate thickness of the movable side support portion are the same dimension, and the depth dimension of the stepped portion is a value obtained by subtracting the plate thickness of the movable spring from the plate thickness of the fixed spring. The switching contact structure according to any one of claims 2 to 6, wherein the switching contact structure is provided.

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