Terminals and Relays

Abstract

The present invention relates to a terminal and a relay. The present invention provides a terminal of an electromagnetic relay, which prevents plastic deformation in the terminal of an electromagnetic relay formed by combining a plurality of components. The movable terminal of the electromagnetic relay is formed by combining a first component having two pins and a second component having a contact point. The second component has at least three holes, and the first component has at least three protrusions that are respectively inserted into at least three holes for riveting. Among the at least three holes, with respect to a straight line tangent to the edges of the holes at the sides close to the contact points at both ends, the other holes are arranged on the side opposite to the contact point.

Description

Technical Field

[0001] The present invention relates to a terminal and a relay. Background Art

[0002] A relay that opens and closes contacts by an electromagnet includes: an electromagnet, an armature, a movable terminal having a movable contact, and a fixed terminal having a fixed contact. By exciting the electromagnet, the armature moves, presses the movable terminal, and brings the movable contact and the fixed contact into contact.

[0003] In Patent Document 1, a relay is disclosed that includes a terminal in which a first member having a movable contact and a second member having a lead pin are fixed by three rivets.

[0004] In Patent Document 2, a relay is disclosed in which an insulating pressing member that presses a movable terminal is assembled to the armature to ensure an insulating distance between the movable terminal and the armature.

[0005] In Patent Document 3, a relay is disclosed in which an electromagnet and an armature are surrounded by an insulating wall to ensure an insulating distance from the movable terminal and the fixed terminal.

[0006] [Patent Document 1] Japanese Patent No. 5741679 Gazette

[0007] [Patent Document 2] Japanese Patent No. 3959894 Gazette

[0008] [Patent Document 3] Japanese Unexamined Patent Application Publication No. 2008-53152 Summary of the Invention

[0009] In a relay including a terminal in which two members are fixed at multiple locations, if an external force is applied to the terminal, the fixed portions of the members may be damaged due to uneven stress concentration.

[0010] An embodiment of the present invention is a terminal of a relay formed by combining a first member having a lead pin and a second member having a contact. The second member has at least three holes, and the first member has at least three protrusions that are respectively inserted into the at least three holes for riveting. Among the at least three holes, other holes are arranged on the side opposite to the contact with respect to a straight line tangent to the edges of the holes on the contact side at both ends.

[0011] Advantages of the Invention

[0012] According to the terminal of one embodiment, when a force is applied to the pressing portion of the second member, the difference between the stress concentrated around one hole and the stress concentrated around an adjacent hole becomes smaller, and the stress is evenly dispersed, thereby preventing plastic deformation of the second member. Brief Description of the Drawings

[0013] Figure 1 It is a perspective view of the relay in the embodiment.

[0014] Figure 2 It is an exploded perspective view of the relay.

[0015] Figure 3 It is a front view of the movable terminal.

[0016] Figure 4 It is a perspective view of the movable terminal.

[0017] Figure 5 It is a front view of the second member with different hole configurations.

[0018] Figure 6 It is a front view of the second member.

[0019] Figure 7 It is a front view of a modified example of the movable terminal.

[0020] Figure 8 It is a front view of the second member of the movable terminal according to the modified example.

[0021] Figure 9 It is a perspective view of the base block.

[0022] Figure 10 It is a perspective view of the first member.

[0023] Figure 11 It is a cross-sectional view of the relay.

[0024] Figure 12 It is an enlarged cross-sectional view of the relay.

[0025] Figure 13 It is a perspective view of the armature assembled with the pressing member.

[0026] Figure 14 It is a perspective view illustrating the assembly of the pressing member to the armature.

[0027] Figure 15 It is a front view of the pressing member.

[0028] Figure 16 It is a side view of the pressing member.

[0029] Figure 17 It is a top view of the pressing member.

[0030] Figure 18 It is a side view showing the positional relationship among the armature, the pressing member, and the movable terminal.

[0031] Figure 19 It is a view showing the cross-section of the pressing frame and the front of the armature.

[0032] Figure 20 It is a perspective view of the armature.

[0033] Figure 21 It is a view showing the riveted portion of the pressing member.

[0034] Figure 22 It is a cross-sectional view of a modified example of the relay.

[0035] Figure 23 It is a perspective view of the coil assembly and the metal part of a modified example of the relay.

[0036] Figure 24 It is a bottom view of the relay. Detailed implementation mode

[0037] Hereinafter, the relay in the implementation mode will be described with reference to the drawings. Figure 1 It is a perspective view of the relay 2 in the implementation mode, Figure 2 and it is an exploded perspective view. The relay 2 includes: a base block (hereinafter referred to as the base body) 4, on which component parts are assembled; and a cover 6, which surrounds the base body 4. For example, the base block 4 and the cover 6 are molded parts formed of resin.

[0038] The component parts assembled on the base block 4 include: a movable terminal 20, a fixed terminal 26, an electromagnet 7, a hinge spring 8, an armature 10, and a pressing member 12 formed of resin or the like.

[0039] The movable terminal 20 has: a first member 14, which has two pins 14a, 14b; and a second member 18, which has a movable contact 16. The fixed terminal 26 has two pins 22a, 22b and a fixed contact 24. The electromagnet 7 includes a coil assembly 27, an iron core 30, and a yoke 32. The coil assembly 27 has: two coil terminals 28, each of which has a pin 28a and a pin 28b; a coil 34, which is connected to the coil terminals 28; and a bobbin 36, on which the coil 34 is wound.

[0040] The electromagnet 7 is excited by applying a voltage to the pins 28a and 28b. By the excitation of the electromagnet 7, the armature 10 swings and is attracted to the iron core 30. The pressing member 12 is assembled at the other end of the armature 10, and presses the movable terminal 20 as the armature 10 swings, causing the movable contact 16 to contact the fixed contact 24. The hinge spring 8 is assembled between the armature 10 and the yoke 32, and applies a force to one end of the armature 10 in a direction away from the iron core 30.

[0041] When the voltage application to the coil terminals 28 is stopped, due to the force applied by the hinge spring 8, the armature 10 returns to a position away from the iron core 30. Along with the return of the armature 10, the pressing force from the pressing member 12 to the movable terminal 20 is released, and the movable contact 16 moves away from the fixed contact 24.

[0042] With the above configuration, the movable contact 16 and the fixed contact 24 are opened and closed. The above is an example, and any configuration can be adopted. For example, the fixed terminal 26 can also be composed of a member having the fixed contact 24 and a member having the pins 22a and 22b.

[0043] Figure 3 This is the front view of the movable terminal 20. The movable terminal 20 is formed by combining the first member 14 and the second member 18.

[0044] The first member 14 has: pins 14a and 14b, which are electrically connected to an external device; and a plurality (three in the figure) of protrusions 36a, 36b, and 36c. The second member 18 has: a movable contact 16; and a plurality (three in the figure) of holes 38a, 38b, and 38c (hereinafter collectively referred to as "holes 38"). The second member 18 has spring characteristics and is a plate-like member that elastically displaces. The first member 14 and the second member 18 are, for example, metals.

[0045] The protrusions 36a, 36b, and 36c are respectively inserted into the corresponding holes 38 and are riveted at their tips to form riveted portions 40a, 40b, and 40c (hereinafter collectively referred to as "riveted portions 40").

[0046] The first member 14 and the second member 18 are connected by the riveted portions 40 and are fixed to each other. When current flows through the movable terminal 20, a voltage drop occurs, but by providing a plurality of riveted portions 40, the internal resistance of the movable terminal 20 can be reduced and the voltage drop can be reduced. For example, in applications where a high current of 30 A or more flows, it is preferable to provide three or more riveted portions 40.

[0047] Figure 3 The three shown riveted portions 40 are arranged side by side. However, the protrusion 36b is arranged at a lower distance H1 than the protrusions 36a and 35c, and the hole 38b is arranged at a lower distance H1 than the holes 38a and 38c. Therefore, the central riveted portion 40b is arranged at a lower distance H1 than the riveted portions 40a and 40c at both ends. The distance H1 is about 0.3 mm, for example.

[0048] The holes 38 have shapes such as circles, ellipses, triangles, and rectangles, and the protrusions 36a, 36b, and 36c have shapes that can be inserted into the respective holes.

[0049] Use Figures 4 to 7 To illustrate the effect of the arrangement of the riveted portions 40. Figure 4 This is the perspective view of the movable terminal 20. The second member 18 is pressed by the pressing member 12 in the A direction and elastically displaces. When the second member 18 displaces in the A direction, stress concentrates around each of the holes 38a to which the protrusions 36a, 36b, and 36c are fixed in the second member 18.

[0050] Figure 5 is a front view of a second member 19 having holes 38d, 38e, 38f (hereinafter collectively referred to as "holes 38'") arranged at positions different from those of Figure 4 and serving as a comparative example. The position of the hole 38e at the center of the second member 19 is different from that of the second member 18, and the three holes 38' are arranged at the same height.

[0051] The pressed portion 42a is a region pressed by the pressed member 12. The stress near each hole 38' is described using the center point 44a of the pressed portion 42a. It is assumed that the center point 44a is located at the geometric center of the second member 19, and the force of the pressed member 12 pressing the second member 19 is applied at one point.

[0052] The magnitude of the stress generated around the hole 38' due to the force received at the center point 44a depends on the distance from the center point 44a. The shorter the distance between the center point 44a and the hole 38', the greater the bending angle near the hole of the second member 19 and the greater the stress.

[0053] In Figure 5 , the lengths of the line segment L11 connecting the center point 44a and the center point 39d of the hole 38d and the line segment L22 connecting the center point 44a and the center point 39f of the hole 38f are substantially the same. In this case, the stress near the hole 38d and the stress near the hole 38f due to the external force applied to the center point 44a are at the same level.

[0054] On the other hand, Figure 5 in, the line segment L33 connecting the center point 44a and the center point 39e of the hole 38e is shorter than the line segments L11 and L22. Figure 5 In, the three holes 38' are arranged in a horizontal row, and a straight line L44 passing through the edges 46a, 48a, 50a on the pressed portion 42a side of each hole 38' is orthogonal to the line segment L33.

[0055] In such a positional relationship, the stress near the hole 38e is greater than the stress near the holes 38d and 38f.

[0056] Figure 6 is a front view of the second member 18 of the present embodiment. Figure 6 is used to describe the stress near each hole 38 of the second member 18.

[0057] The hole 38b arranged at the center is arranged below the holes 38a and 38c. The straight line L10 is a straight line tangent to the edges 46, 50 on the movable contact 16 side of the holes 38a, 38c. When the holes 38a, 38c are circular, the straight line L10 is a tangent to the circle.

[0058] The hole 38b is located on the side opposite to the movable contact 16 with respect to the straight line L10.

[0059] The line segment L1 connecting the center point 44 and the center point 39a of the hole 38a and the line segment L2 connecting the center point 44 and the center point 39c of the hole 38c are of substantially the same length.

[0060] The hole 38b is arranged below the holes 38a and 38c and is located on the side opposite to the movable contact 16 with respect to the straight line L10.

[0061] In the present embodiment, the length of the line segment L3 connecting the center point 44 and the center point 39b of the hole 38b is Figure 5 longer than that of the line segment L33 and is close to the lengths of the line segments L1 and L2. Therefore, in the present embodiment, relatively speaking, the stress near the hole 38b is reduced.

[0062] By arranging the hole 38b at a position where the difference between the lengths of the line segments L1 and L2 and the length of the line segment L3 becomes smaller, when a force is applied to the pressing portion 42, the difference in stress around one hole and the stress around its adjacent hole becomes smaller, and the stress is dispersed uniformly, thereby preventing plastic deformation of the second member 18.

[0063] Figure 7 It is a front view of the movable terminal 20B which is a modified example. Figure 7 The shown hole 38b is smaller than the holes 38a and 38c, and the protrusion 36b is smaller than the protrusions 36a and 36c. As a result, the hole 38b is arranged at a distance H2 below the holes 38a and 38c, and the protrusion 36b is arranged at a distance H2 below the protrusions 36a and 36c. The distance H2 is, for example, 0.3 mm.

[0064] Figure 8 It is a front view of the second member 18B. Use Figure 8 to illustrate the stress near the hole 38 of the second member 18B.

[0065] The center points 39a, 39b, and 39c of the holes 38a, 38b, and 38c are arranged on the same straight line, but the edge on the movable contact 16 side of the hole 38b is arranged below the holes 38a and 38c.

[0066] The straight line L10 is a straight line tangent to the edges 46 and 50 on the movable contact 16 side of the holes 38a and 38c.

[0067] The hole 38b is arranged to be on the side opposite to the movable contact 16 with respect to the straight line L10.

[0068] The length of the line segment L1 connecting the center point 44 and the center point 39a of the hole 38a and the length of the line segment L2 connecting the center point 44 and the center point 39c of the hole 38c are substantially the same.

[0069] The hole 38b is arranged below the holes 38a and 38c, and is located on the side opposite to the movable contact 16 with respect to the straight line L10.

[0070] The length of the line segment L3 connecting the center point 44 and the center point 39b Figure 5 is longer than the line segment L33 of Figure 5 and is close to the lengths of the line segments L1 and L2. Therefore, in the present embodiment, compared with

[0071] the stress concentrated near the central hole 38b is reduced.

[0072] By arranging the hole 38b at a position where the difference between the lengths of the line segments L1 and L2 and the length of the line segment L3 becomes smaller, when a force is applied to the pressing portion 42, the difference between the stress around one hole and the stress around its adjacent hole becomes smaller, and the stress is dispersed evenly, thereby preventing plastic deformation of the second member 18B. Figure 3 In the movable terminal 20B, by reducing the diameter of the hole 38b, the difference between the length of the line segment L3 and the lengths of the line segments L1 and L2 becomes smaller. Therefore, when compared with

[0073] the lower end of the hole 38b is located on the upper side, so the hole 38b can be formed without extending the edge portion 52a. Therefore, the enlargement of the movable terminal 20B can also be avoided.

[0074] The arrangement of the riveting portion 40 can also be applied to the fixed terminal 26 composed of a combination of a first member having a fixed contact 24 and a second member having pins 22a and 22b.

[0075] Figure 10 is a perspective view of the first member 14.

[0076] When a high current flows through the terminal, it is possible to consider increasing the pins to reduce the internal resistance. When a shape such as a blade terminal is adopted to enlarge the pins, it is necessary to open a square hole in the substrate for connecting the pins.

[0077] On the other hand, in Figure 10In the case where a plurality of relatively small pins are provided like pins 14a and 14b shown to reduce the internal resistance, relatively small holes may be formed instead of square holes in the substrate, and the design of the substrate is easier than that using sheet-like terminals.

[0078] The first member 14 has a support portion 56 having a flat surface 56a. Three protrusions 36a, 36b, and 36c are formed on the surface 56a. As Figure 4 shown, the support portion 56 is disposed on the side of the second member 18 where the movable contact 16 is provided with respect to the second member 18 to support the second member 18.

[0079] In the first member 14, the surface 56a is brought into contact with the surface 18a of the second member 18 where the movable contact 16 is provided, whereby the force applied to the second member 18 pressed by the pressed member 12 is received at the contact portion.

[0080] When the second member 18 is stressed by the pressed member 12, it is pressed toward the first member 14. At this time, the second member 18 is supported by the upper end 56b of the surface 56a. Therefore, the stress generated near the riveted portion 40 of the second member 18 is dispersed along the upper end 56b. Therefore, compared with the case where there is no support portion 56, the stress near each hole 38 is reduced. In the case where the first member is disposed at a position opposite to Figure 4 support the second member, when the second member is pressed by the pressed member, the stress is concentrated on the riveted portion, especially the upper end, and relatively high stress may be generated. In contrast, in the present embodiment, the first member 14 is disposed on the side where the second member 18 is pressed. Therefore, the lower portion of the second member 18 is supported by the first member 14, especially by the linear upper end 56b. As a result, the range where the second member 18 is supported is expanded, and the upper end 56b of the second member 18 that supports the second member 18 is away from the riveted portion 40. Therefore, the stress generated in the second member 18 is dispersed, and stress concentration on the riveted portion 40 can be prevented.

[0081] Use Figure 4 and Figure 10 to illustrate the configuration of pins 14a and 14b. The pin 14a has a base end 58a connected to the support portion 56. The base end 58a protrudes toward the side of the second member 18 opposite to the side where the movable contact 16 is provided.

[0082] The pin 14a has a tip end 60a bent from the base end 58a. The tip end 60a is formed to extend downward in a direction away from the second member 18. The base end 58a is bent such that the portion connected to the tip end 60a is disposed above the portion connected to the support portion 56

[0083] The pin 14b has the same configuration as the pin 14a and has a base end 58b and a tip end 60b.

[0084] Figure 11 is of relay 2 Figure 1 Cross-sectional view A1 - A1. Figure 12 is Figure 11 An enlarged cross-sectional view of region XII. Region XII is an enlarged view near the first member 14. Use Figure 12 to explain pins 14a and 14b.

[0085] The base 4 has a bottom 61 that houses and supports the movable terminal 20 and the fixed terminal 26, and is coated with an adhesive 71 such as epoxy resin. The bottom 61 has a first bonding portion 62 that includes: a hole 64 for leading the end 60a of the pin 14a to the outside of the relay 2.

[0086] The outer surface 62a of the first bonding portion 62 is coated with the adhesive 71 to block the hole 64, thereby preventing foreign substances such as solder and flux from entering the inside of the relay 2.

[0087] The bottom 61 has a second bonding portion 70 that includes: a hole 72 for leading the pin 22a to the outside of the relay 2. The surface 70a of the second bonding portion 70 is coated with the adhesive 71, and the hole 72 is blocked. The surfaces 62a and 70a are arranged on the same plane. In order to ensure the space for filling the adhesive 71, the surfaces 62a and 70a are arranged above the lower end 6a of the cover 6.

[0088] The bottom 61 has a raised portion 66. The raised portion 66 has a recess 68 that bulges downward when viewed from the surfaces 62a and 70a, and at the position of the recess 68, it protrudes outward from the relay 2 compared to the first bonding portion 62 and the second bonding portion 70. The surfaces 62a and 70a are located inside the raised portion 66 when viewed from below. Figure 12 The base ends 58a are received in the recess 68. The end 60b is arranged outside the recess 68 and is led to the outside of the relay 2 from the hole 64. The end 60b does not lead to the outside of the relay 2 from below the riveting portion 40b. Regarding the pin 14b (not shown), the base end 58b is also received in the recess 68, and the first bonding portion 62 has an unshown hole for leading the end 60b of the pin 14b to the outside of the electromagnetic relay 2. The hole is coated with the adhesive 71.

[0089] By receiving the base ends 58a, 58b in the recess 68 and leading the ends 60a, 60b to the outside of the relay 2 at positions deviated from below the riveting portion 40, it is not necessary to ensure the space for coating the adhesive 71 below the riveting portion 40, and the accommodation space of the second member 18 can be expanded by only the height of the recess 68. Therefore, the low height of the relay 2 can be maintained, and the second member 18 can be lengthened to increase the allowable current.

[0090] By receiving the base ends 58a, 58b in the recess 68 and leading the ends 60a, 60b to the outside of the relay 2 at positions deviated from below the riveting portion 40, it is not necessary to ensure the space for coating the adhesive 71 below the riveting portion 40, and the accommodation space of the second member 18 can be expanded by only the height of the recess 68. Therefore, the low height of the relay 2 can be maintained, and the second member 18 can be lengthened to increase the allowable current.

[0091] Figure 13 This is a perspective view of the armature 10 equipped with the pressing member 12. The armature 10 has: a first part 74 that adsorbs to the iron core 30; and a second part 76 that extends from the first part 74. The second part 76 has a bent portion 78 that is connected to the first part 74. The pressing member 12 is assembled to the top end of the second part 76 and fixed to the armature 10. The armature 10 is formed of metal, and the pressing member 12 is formed of resin.

[0092] As Figure 11 shown, an iron core 30 is disposed below the first part 74. By exciting the electromagnet 7, the first part 74 moves in the B direction, and the adsorption surface 74a adsorbs to the iron core 30.

[0093] The armature 10 swings around the swing axis 80 located at the bent portion 78 while deforming the leaf spring 8. When the first part 74 moves in the B direction, the second part 76 moves in the A direction, and the pressing member 12 presses the movable terminal 20. The movable terminal 20 is displaced as the armature 10 moves.

[0094] Figure 14 This is a perspective view of the armature 10 and the pressing member 12. The second part 76 has: a plate-shaped insertion part 82 that is inserted into the pressing member 12 provided at the top end; and grooves 84 that are arranged side by side on the upper side of the insertion part 82. The insertion part 82 and the grooves 84 extend in a direction parallel to the swing axis 80, and the pressing member 12 is fitted into the grooves 84. It should be noted that the "direction parallel to the swing axis" includes a substantially parallel direction considering manufacturing tolerances and the like.

[0095] Figure 15 This is a front view of the pressing member 12. Figure 16 This is a side view of the pressing member 12 as viewed from the right side of Figure 14 the figure shown. The pressing member 12 has a pressing part 86 that protrudes toward the movable terminal 20. The top end 86a of the pressing part 86 extends linearly and is arranged parallel to the swing axis 80 in a state where the pressing member 12 is assembled to the armature 10.

[0096] The pressing member 12 has a receiving part 88 that houses the insertion part 82 in a surrounding wall 90 with an opening at one end. The receiving part 88 has: four inner surfaces 88a, 88b, 88c, and 88d; a bottom surface 88e; and an opening 91 located on the opposite side of the bottom surface 88e.

[0097] Figure 17 This is a top view of the pressing member 12. The pressing member 12 has a fitting part 92 that is fitted into the grooves 84. The fitting part 92 is a part of the surrounding wall 90.

[0098] Figure 19 This shows Figure 16View of the B1 - B1 section and the front of the armature 10. The length of the inner surface 88d of the insertion portion 92 from the bottom surface 88e is shorter than those of the other inner surfaces 88a, 88b, and 88c, and the opening 91 opens Figure 19 to the right and upward.

[0099] When the pressing member 12 is assembled to the armature 10, the insertion portion 82 is inserted into the receiving portion 88. The insertion portion 92 is guided along the groove 84, whereby the pressing member 12 is assembled to the armature 10 in the C direction parallel to the swing axis 80.

[0100] In order to facilitate the insertion of the insertion portion 82 into the receiving portion 88, tapered guide surfaces 93 and 95 are formed at the portion of the inner surface 88d located at the opening 91 and at the tip of the insertion portion 82. In the state where the insertion portion 82 is completely received in the receiving portion 88, the receiving portion 88 covers the insertion portion 82 with the surrounding wall 90.

[0101] By adopting the configuration in which the insertion portion 82 is inserted into the receiving portion 88 in the C direction and the insertion portion 92 is inserted into the groove 84 to assemble the pressing member 12 to the armature 10, the pressing member 12 can be prevented from being displaced in the vertical direction relative to the armature 10. Therefore, even if a displacement occurs between the armature 10 and the pressing member 12, the direction of the displacement is limited to the direction parallel to the swing axis 80 along the groove 84.

[0102] Figure 18 This is a view showing the positional relationship among the armature 10, the pressing member 12, and the movable terminal 20. Even if the pressing member 12 is displaced relative to the armature 10 in the direction parallel to the swing axis 80, the distance L21 from the swing axis 80, which is the rotation fulcrum of the armature 10, to the tip 86a of the contact point between the pressing member 12 and the movable terminal 20 remains unchanged.

[0103] In this way, in the relay 2, even if the position of the pressing member 12 relative to the armature 10 is displaced due to an impact or the like, the direction of the displacement is limited to the direction parallel to the swing axis 80, so the distance L21 remains unchanged. As long as the distance L21 remains unchanged, the vertical position of the pressing member 12 pressing the movable terminal 20 also remains unchanged. Therefore, the moment of the pressing force exerted by the pressing member 12 on the movable terminal 20 remains unchanged. Therefore, the voltage applied to the coil 34 to attract the first portion 74 of the armature 10 also remains unchanged, and it is possible to prevent changes in characteristics such as the operating voltage of the relay 2.

[0104] In the pressing member 12, the surrounding wall 90 covers the insertion portion 82 to insulate the armature 10 from the movable terminal 20. In addition, a pressing portion 86 protruding toward the movable terminal 20 is provided outside the surrounding wall 90. Therefore, the armature 10 and the movable terminal 20 are arranged at positions Figure 18 separated in the left - right direction. As a result, it is possible to ensureFigure 18 The surface distance between the armature 10 indicated by the dashed arrow and the movable terminal 20.

[0105] As Figure 16 and Figure 19 shown, the pressing member 12 has a first protrusion 94 on the inner surface 88b, and the first protrusion engages with the end face 98 of the insertion portion 82.

[0106] The first protrusion 94 has a shape of a rib and linearly extends from the vicinity of the opening 91 of the surrounding wall 90 to the bottom face 88e in a direction parallel to the inner surfaces 88a and 88c. In a state where the pressing member 12 is assembled to the armature 10, the first protrusion 94 is arranged parallel to the swing axis 80.

[0107] The first protrusion 94 has a high back portion 94a and a low back portion 94b with different heights from the inner surface 88b. The high back portion 94a is formed on the side closer to the bottom face 88e, and the low back portion 94b with a height lower than that of the high back portion 94a from the inner surface 88b is formed on the side closer to the opening 91.

[0108] Figure 20 is a perspective view of the armature 10 viewed from a side that does not face the movable terminal 20. The armature 10 has an end face 98 parallel to the swing axis 80 at the end of the insertion portion 82. The end face 98 has a stepped shape, and the end face 98a closer to the swing axis 80 engages with the high back portion 94a, while on the other hand, the end face 98b farther from the swing axis 80 engages with the low back portion 94b.

[0109] When assembling the pressing member 12 to the armature 10, when the insertion portion 82 is inserted into the receiving portion 88 in the C direction, the end face 98 of the insertion portion 82 slides on the first protrusion 94. As the insertion portion 82 is pressed into the receiving portion 88, after the end face 98a passes through the low back portion 94b, it engages with the high back portion 94a in a biting manner, and the end face 98b engages with the low back portion 94b in a biting manner.

[0110] The first protrusion 94 is a member that positions the pressing member 12 relative to the long side direction of the armature 10. The end face 98 engages with the first protrusion 94, so that the other edge portion 99 of the insertion portion 82 is pressed against the inner surface 88d. As a result, the insertion portion 82 is pressed and fixed in the receiving portion 88, preventing the armature 10 and the pressing member 12 from deviating in the vertical direction.

[0111] In addition, since the insertion portion 82 engages with the high back portion 94a and the low back portion 94b at the two points of the end faces 98a and 98b, it is possible to prevent the insertion portion 82 and the pressing member 12 from being inclined in a direction in which the parallelism between the end face 98 and the inner surface 88b deteriorates when the pressing member 12 is pressed into the armature 10. As a result, a high level of parallelism between the tip 86a and the swing axis 80 is ensured.

[0112] The pressing member 12 has a second protrusion 96 on the inner surface 88c, and the second protrusion 96 engages with the surface 100 of the insertion portion 82.

[0113] The second protrusion 96 has the shape of a rib and linearly extends from the vicinity of the opening 91 of the surrounding wall 90 to the bottom surface 88e in a direction parallel to the inner surfaces 88b and 88d. In a state where the pressing member 12 is assembled to the armature 10, the second protrusion 96 is arranged parallel to the swing axis 80.

[0114] The second protrusion 96 has a high back portion 96a and a low back portion 96b with different heights from the inner surface 88c. The high back portion 96a is formed on the side closer to the bottom surface 88e, and the low back portion 96b lower than the high back portion 94a is formed on the side closer to the opening 91.

[0115] The armature 10 has a surface 100 and an end surface 106. The surface 100 has: an inner side portion 100a away from the end surface 106; and a front side portion 100b close to the end surface 106. The inner side portion 100a has a concave portion 102 parallel to the swing axis 80, and the surface 100 is formed in a stepped shape by the concave portion 102 and the front side portion 100b. The surface 100 engages with the high back portion 96a at the concave portion 102, and on the other hand, engages with the low back portion 96b at the front side portion 100b.

[0116] When the pressing member 12 is assembled to the armature 10, when the insertion portion 82 is inserted into the receiving portion 88 in the C direction, the surface 100 of the insertion portion 82 slides on the second protrusion 96. As the insertion portion 82 is pressed into the receiving portion 88, the concave portion 102 of the surface 100 engages with the high back portion 96a after passing through the low back portion 96b, and the front side portion 100b engages with the low back portion 96b.

[0117] The second protrusion 96 is a member that positions the pressing member 12 in the direction of movement of the second portion 76 of the armature 10. The surface 100 engages with the second protrusion 96, whereby the surface 100 is pressed against the inner surface 88a. As a result, the insertion portion 82 is pressed and fixed to the receiving portion 88, preventing the deviation of the armature 10 and the pressing member 12 in the A direction.

[0118] The surface 100 of the insertion portion 82 engages with the high back portion 96a and the low back portion 96b at two points of the concave portion 102 and the front side portion 100b, so that when the pressing member 12 is pressed into the armature 10, it is possible to prevent the insertion portion 82 and the pressing member 12 from being inclined in a direction in which the parallelism between the surface 100 and the inner surface 88c deteriorates. As a result, a high level of parallelism between the tip 86a and the swing axis 80 is ensured.

[0119] Note that the end faces 98 and 100 may not have a stepped shape. The first protrusion 94 may not have a high back portion 94a and a low back portion 94b, but may be formed in a manner of the same height. The second protrusion 96 may not have a high back portion 96a and a low back portion 96b, but may be formed in a manner of the same height.

[0120] In this case, the end face 98 of the insertion portion 82 engages with the first protrusion 94, whereby the other edge portion 99 is pressed against the inner surface 88d. As a result, the insertion portion 82 is press-fitted and fixed to the housing portion 88, preventing the armature 10 and the pressing member 12 from deviating in the vertical direction.

[0121] In addition, the face 100 engages with the second protrusion 96, whereby the face 101 is pressed against the inner surface 88a. As a result, the insertion portion 82 is press-fitted and fixed to the housing portion 88, preventing the armature 10 and the pressing member 12 from deviating in the A direction.

[0122] Figure 21 Shows a riveting structure for fixing the pressing member 12 to the armature. The pressing member 12 has a riveting portion 104, which is adjacent to the opening 91 and is located to the right of the housing portion 88. In addition, the armature 10 has an end face 106 formed by cutting a notch at one end.

[0123] The riveting portion 104 deforms when heated. Figure 21 (a) of shows the riveting portion 104 before deformation, Figure 21 (b) of shows the riveting portion 104 after deformation.

[0124] Figure 21 The deformed riveting portion 104 shown in (b) of engages with the end face 106. The riveting portion 104 engages with the end face 106, whereby the pressing member is fixed to the armature, and even when there is an external impact or the like, it is possible to prevent the position deviation and detachment of the pressing member 12.

[0125] Refer to Figure 9 and Figure 11 to describe the insulation structure of the relay 2. Figure 9 Is a perspective view of the base 4. The relay 2 miniaturizes the device and ensures the insulation distance of each part. Note that the insulation distance includes the space distance and the surface distance.

[0126] The relay 2 has: a first region 110, in which the coil 34 and the iron core 30 are arranged; and a second region 112, in which the movable terminal 20, the fixed terminal 26, and the pressing member 12 are arranged. The base 4 has a wall 108, and the wall 108 is located between the first region 110 and the second region 112 and extends in the vertical direction.

[0127] The wall 108 is formed of resin, for example, to insulate the coil 34 from the movable terminal 20 and the fixed terminal 26. The wall 108 is formed to separate the first region 110 from the second region 112 and cover the portion of the coil 34 near the second region 112, so that the insulation distance between the coil 34 and the movable terminal 20 and the fixed terminal 26 can be ensured.

[0128] The first portion 74 is disposed above the coil 34 and the iron core 30 in the first region 110. The second portion 76 extends from the first portion 74 and is disposed in the second region 112.

[0129] The pressing member 12 having the pressing portion 86 is assembled to the second portion 76, so that the insulation distance between the armature 10 and the movable terminal 20 can be ensured by the pressing member 12.

[0130] The bobbin 36 has: a first flange portion 118 and a second flange portion 120; and a cavity 121 for inserting the iron core 30. The bobbin 36 is a molded part formed of resin, for example. The first flange portion 118 and the second flange portion 120 insulate the iron core 30 from the coil 34. The first flange portion 118 and the second flange portion 120 cover the upper surface 34a and the lower surface 34b of the coil 34, so that the insulation distance between the iron core 30 and the coil 34 can be ensured.

[0131] The base 4 has a first extension portion 114 and a second extension portion 116 that extend from the wall 108 and are disposed in the first region 110. The first extension portion 114 is connected to the wall 108 above and protrudes toward the first region 110 side. The second extension portion 116 is connected to the wall 108 below and protrudes toward the first region 110 side. The first extension portion 114 is disposed opposite to the upper side of the first flange portion 118. The second extension portion 116 is disposed opposite to the lower side of the second flange portion 120. The first extension portion 114 and the second extension portion 116 insulate the coil 34 from the armature 10 and the yoke 32. The upper surface 34a is covered by the first extension portion 114 and the first flange portion 118, so that the insulation distance between the coil 34 and the first portion 74 can be ensured. Similarly, the lower surface 34b is covered by the second extension portion 116 and the second flange portion 120, so that the insulation distance between the coil 34 and the first portion 122 can be ensured.

[0132] The yoke 32 has: a first portion 122 disposed in the first region 110; and a second portion 124 that bends and extends from the first portion 122 and is disposed in the second region 112. The second portion 124 extends along the wall 108 and supports the bending portion 78 at the end 126. The wall 108 insulates the second portion 124 from the coil 34. The wall 108 covers the coil 34, so that the insulation distance between the coil 34 and the second portion 124 can be ensured.

[0133] By using the bobbin 36 and the base body 4 of the present embodiment, the insulation distance between the coil 34 and each part can be ensured. It is not necessary to add other elements to ensure insulation, so an increase in the space inside the relay can be prevented, the miniaturization of the relay can be maintained, and the insulation between each part can be ensured.

[0134] The yoke 32 has an opening 128 in the first part 122. The iron core 30 has a protrusion 130 at its end. By inserting and riveting the protrusion 130 into the opening 128, the iron core 30 and the yoke 32 are connected to form a magnetic circuit.

[0135] The iron core 30 has a shaft 132 inserted into the cavity 121 and a head 134 disposed outside the first flange portion 118. The head 134 extends outward from the top end of the shaft 132 outside the coil 34 and has a surface 134a facing the outside in the axial direction of the iron core 30. By the excitation of the coil 34, the adsorption surface 74a adsorbs to the surface 134a.

[0136] The head 134 has a surface 134b that extends outward from the outer periphery of the shaft 132 on the opposite side of the surface 134a. The first extension portion 114 extending from the wall portion 108 inserts its thin-walled portion 114a at the top end between the head 134 and the coil 34, and more specifically, between the surface 134b of the head 134 and the first flange portion 118.

[0137] Refer to Figure 2 、 Figure 11 and Figure 24 The assembly sequence of the relay 2 will be described. Figure 24 is a bottom view of the relay 2. After accommodating the bobbin 36 wound with the coil 34 in the base body 4, the iron core 30 is inserted from above, and the head 134 is inserted between the first extension portion 114 and the second extension portion 116 of the base body 4 in a posture adjacent to the first extension portion 114.

[0138] An opening 148 for exposing the second extension portion 116 is provided at the bottom 61 of the base body 4. The second part 124 is inserted from the opening 148, and the first part 122 is disposed outside the second extension portion 116. Thereafter, the protrusion 130 protruding from the bobbin 36 is inserted and riveted to the opening 128.

[0139] Through this riveting process, the thin-walled portion 114a is sandwiched between the surface 134b and the first flange portion 118, and in addition, the second extension portion 116 is sandwiched between the first part 122 and the second flange portion 120. In this way, the electromagnet 7 and the base body 4 are firmly fixed without mutual shaking.

[0140] As Figure 24As shown, the first part 122 is exposed from the opening 148. An adhesive 71 is coated on the bottom 61, which is shown shaded. In this embodiment, the first part 122 and the area of the bottom 61 around the first part 122 are covered by the adhesive 71.

[0141] By inserting the yoke 32 through the opening 148, the assembly of the relay 2 becomes easy, and by covering the adhesive 71, the inside of the relay 2 is sealed to prevent foreign matter from entering from the outside. Moreover, insulation between the relay 2 and external devices is ensured.

[0142] Figure 22 is a modified example of the relay 2 Figure 1 A1 - A1 cross-sectional view. In this embodiment, the iron core 30 and the yoke 32 are integrally formed on the metal part 138, which can reduce the manufacturing cost of the relay 2.

[0143] The metal part 138 has: an iron core 140 inserted into the cavity 121; and a yoke 142 that bends and extends from the iron core 140. The iron core 140 has a surface 140a outside and above the coil 34. By exciting the coil 34, the adsorption surface 74a is adsorbed to the surface 140a.

[0144] The yoke 142 has: a first part 144 that bends and extends from the iron core 140 and is disposed in the first region 110; and a second part 146 that extends from the first part 144 and is disposed in the second region 112. The second part 146 extends along the wall 108 and supports the bent part 78 at the end 147. The wall 108 insulates the second part 146 from the coil 34.

[0145] Figure 23 Is a perspective view of the coil assembly 27 and the metal part 138 of the modified example of the relay 2. As Figure 23 shown, the iron core 140 and the cavity 121 are formed, for example, as a rectangular parallelepiped.

[0146] The above embodiments can be appropriately combined. In addition, in the above figures, the same or corresponding parts are marked with the same reference numerals. It should be noted that the above embodiments are illustrative and do not limit the technical solutions.

Claims

1. A terminal is formed by combining a first member having pins and a second member having contacts. The second member has at least three holes. The first member has at least three protrusions that are respectively inserted into the at least three holes for riveting. Among the at least three holes, with respect to a straight line tangent to the edges on the side closer to the contacts of the holes at both ends, the other holes are arranged on the side opposite to the contacts. The first member has a support portion formed with the at least three protrusions. The support portion is arranged on the side of the second member where the contacts are provided with respect to the second member, and supports the second member on the side where the contacts are provided.

2. The terminal according to claim 1, wherein, among the at least three holes, the other holes are smaller than the holes at both ends.

3. The terminal according to claim 1 or 2, wherein, the pin has: a base end that protrudes from the second member toward the side opposite to the side where the contacts are provided; and a tip end that bends from the base end and extends in a direction away from the second member.

4. A relay includes: the terminal according to claim 3; and a base block that supports the terminal, the base block includes: a hole for leading out the tip end of the pin to the outside; and a raised portion having a recess for receiving the base end of the pin, and bulging outward at a position of the recess more than the hole.

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