JP2024006066A - electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of securing the strength of a bottom wall of a holding groove without increasing the thickness of a holding member.

SOLUTION: An electromagnetic relay includes a fixed terminal 52, a movable contact, and a holding member 51. The fixed terminal 52 has a fixed contact. The movable contact is in contact with or separated from the fixed contact. The holding member 51 holds the fixed terminal 52. The holding member 51 has a first main surface 51a and a second main surface 51b opposed to each other. The holding member 51 has, in the first main surface 51a, holding grooves 51i in which the fixed terminals 52 are arranged. The holding groove 51i has a protruding part 51p protruding from a bottom surface 51m of the holding groove 51i. The fixed terminal 52 has a recess 521f in which the protruding part 51p is arranged at the end facing the bottom surface 51m of the holding groove 51i.

SELECTED DRAWING: Figure 12

COPYRIGHT: (C)2024,JPO&INPIT

Description

TECHNICAL FIELD This disclosure relates generally to electromagnetic relays, and more particularly to electromagnetic relays that include fixed contacts and movable contacts.

The electromagnetic relay (electromagnetic relay) described in Patent Document 1 includes a fixed terminal having a fixed contact, a movable contact that comes into contact with and separates from the fixed contact, and a fixed terminal holding part (holding member) that holds the fixed terminal. . The fixed terminal has a terminal arm portion that is held by the fixed terminal holding portion. The fixed terminal holding portion has a terminal hole portion (holding groove) on its first side portion (first main surface) that accommodates the terminal arm portion of the fixed terminal. The fixed terminal is held by the fixed terminal holding part by having the terminal arm part accommodated in the terminal hole part of the fixed terminal holding part.

JP2018-98181A

In the above electromagnetic relay, in order to ensure the strength of the bottom wall of the terminal hole (retaining groove), when the thickness of the bottom wall of the terminal hole is increased, the thickness of the fixed terminal holding portion (retaining member) increases. As a result, electromagnetic relays (electronic relays) become larger.

An object of the present disclosure is to provide an electromagnetic relay that can ensure the strength of the bottom wall of a holding groove without increasing the thickness of the holding member.

An electromagnetic relay according to one aspect of the present disclosure includes a fixed terminal, a movable contact, and a holding member. The fixed terminal has a fixed contact. The movable contact contacts or separates from the fixed contact. The holding member holds the fixed terminal. The holding member has a first main surface and a second main surface facing each other. The holding member has a holding groove in the first main surface in which the fixed terminal is arranged. The retaining groove has a protrusion that protrudes from the bottom surface of the retaining groove. The fixed terminal has a recess in which the protrusion is disposed at an end opposite to the bottom surface of the holding groove.

According to the present disclosure, there is an advantage that the strength of the bottom wall of the holding groove can be ensured without increasing the thickness of the holding member.

FIG. 1 is a perspective view of an electromagnetic relay according to an embodiment. FIG. 2 is an exploded perspective view of the electromagnetic relay same as above. FIG. 3 is an exploded perspective view of the relay main body of the electromagnetic relay as seen from the right side. FIG. 4 is an exploded perspective view of the relay main body of the electromagnetic relay as seen from the left side. FIG. 5 is an exploded perspective view of a movable unit included in the relay main body. FIG. 6 is an exploded perspective view of an electromagnetic block included in the movable unit. FIG. 7 is a partially enlarged view of FIG. 4. FIG. 8 is an exploded perspective view of FIG. 4 with the coil terminal removed. FIG. 9 is a partial sectional view taken along line IX-IX in FIG. 7. FIG. 10 is a partial cross-sectional view taken along line XX in FIG. 7. FIG. 11 is an exploded perspective view of the fixed block included in the electromagnetic relay as seen from the left side. FIG. 12 is a partial sectional view taken along line XII-XII in FIG. 4. FIG. 13 is a perspective view of the electromagnetic relay seen from below. FIG. 14 is a partial cross-sectional view taken along line XIV-XIV in FIG. 13. FIG. 15 is a partial cross-sectional view taken along line XV-XV in FIG. 13. FIG. 16 is a partial cross-sectional view of Comparative Example 1. FIG. 17 is a partial cross-sectional view of Comparative Example 2. FIG. 18 is a partial cross-sectional view of Comparative Example 3. FIG. 19A is a partial cross-sectional view of an electromagnetic relay according to Modification 1. FIG. 19B is a partial cross-sectional view of an electromagnetic relay according to modification 2.

An electromagnetic relay according to an embodiment of the present disclosure will be described with reference to the drawings. Each of the figures described in the embodiments below is a schematic diagram, and the ratio of the size and thickness of each component in the figure does not necessarily reflect the actual size ratio.

(1) Overview As shown in FIGS. 4 and 8, the electromagnetic relay 1 of this embodiment includes a coil 8, a bobbin 9, a fixed contact F1, a movable contact M1, and coil terminals 12A and 12B. . The coil 8 is formed by winding a conducting wire 8a (see FIG. 14). The bobbin 9 holds the coil 8. The first movable contact M1 (movable contact) contacts or separates from the first fixed contact F1 (fixed contact). The coil terminals 12A, 12B are fixed to the bobbin 9, and the ends of the conducting wires 8a are wound around the coil terminals 12A, 12B. The bobbin 9 has a left end surface 93L (first surface) and a lower surface 93p (second surface) that are different from each other. The coil terminals 12A, 12B have a base 121, a conductive wire winding portion 122, and an external connection portion 123. The conducting wire winding portion 122 is wound with the conducting wire 8a, extends from the base portion 121, and projects from the left end surface 93L of the bobbin 9. The external connection portion 123 extends from the base portion 121 and protrudes from the lower surface 93p of the bobbin 9. The base portion 121 includes a fitting portion 121d and a connecting portion 121e. The fitting portion 121d fits into the bobbin 9. The connecting portion 121e connects the conductive wire winding portion 122 and the fitting portion 121d. The bobbin 9 has a recess 93i. The recess 93i is provided adjacent to the connecting portion 121e on the left end surface 93L.

According to this configuration, even if the sealant is applied to the lower surface 93p of the bobbin 9 and the applied sealant enters the base of the conductor winding portion 122 on the left end surface 93L of the bobbin 9, The sealant accumulates in a recess 93i provided in the left end surface 93L. Therefore, the sealant applied to the lower surface 93p can be prevented from accumulating at the base of the wire winding portion 122 without increasing the size of the electromagnetic relay 1.

Further, as shown in FIGS. 4 and 12, the electromagnetic relay 1 of this embodiment includes a first fixed terminal 52 (fixed terminal), a first movable contact M1 (movable contact), and a holding member 51. . The first fixed terminal 52 has a first fixed contact F1 (fixed contact). The first movable contact M1 contacts or separates from the first fixed contact F1. The holding member 51 holds the first fixed terminal 52. The holding member 51 has a left main surface 51a (first main surface) and a right main surface 51b (second main surface) that face each other. The holding member 51 has a holding groove 51i in the left main surface 51a, in which the first fixed terminal 52 is arranged. The holding groove 51i has a protrusion 51p that protrudes from the bottom surface 51m of the holding groove 51i. The first fixed terminal 52 has a recess 521f in which the protrusion 51p is arranged at the end (right end) facing the bottom surface 51m of the holding groove 51i.

According to this configuration, by providing the protrusion 51p on the bottom surface 51m of the holding groove 51i, the strength of the bottom wall of the holding groove 51i can be ensured without increasing the thickness D4 of the holding member 51.

As a result, even if the recess 51h for preventing material residue is provided in the right main surface 51b of the holding member 51 in the portion overlapping with the holding groove 51i, the protrusion 51p overlaps with the recess 51h on the bottom surface 51m of the holding groove 51i. With this arrangement, the thickness D6 of the bottom wall of the recess 51h can be ensured without increasing the thickness D4 of the holding member 51. By ensuring the thickness D6 in this way, the strength of the bottom wall of the recess 51h can be ensured, and the fluidity of the molten resin at the bottom wall of the recess 51h can be ensured during injection molding of the holding member 51. . The above-mentioned "concave portion 51h for preventing material remaining" is a countermeasure for an unnecessary portion formed on the right main surface 51b of the holding member 51 by molding material remaining in the gate of the mold used during injection molding of the holding member 51. This is a recess for use.

(2) Overall Configuration Hereinafter, the overall configuration of the electromagnetic relay 1 of this embodiment will be described in detail with reference to the drawings.

The electromagnetic relay 1 is, for example, a hinge type relay. The electromagnetic relay 1 includes a contact device including switching contacts consisting of a first movable contact M1 and a first fixed contact F1, which will be described later. The electromagnetic relay 1 includes a plurality (for example, two) of the above contact devices. That is, the electromagnetic relay 1 is an electromagnetic relay that can individually open and close a plurality of switching contacts. Although the electromagnetic relay 1 includes a plurality of contact devices in this embodiment, it may be configured to include only one contact device.

In this embodiment, the contact device further includes a second fixed contact F2 and a second movable contact M2, which will be described later, in addition to the first fixed contact F1 and the first movable contact M1. The second fixed contact F2 is a different fixed contact from the first fixed contact F1. The second movable contact M2 operates together with the first movable contact M1 to contact and separate from the second fixed contact F2. In the following description, the first fixed contact F1 and the second fixed contact F2 may be collectively referred to as fixed contacts F1 and F2. Further, the first movable contact M1 and the second movable contact M2 may be collectively referred to as movable contacts M1 and M2.

The electromagnetic relay 1 can be used, for example, to open and close a power window of a vehicle (for example, an automobile). In this case, the electromagnetic relay 1 uses one of the two contact devices to switch between operating and stopping the power window opening operation, and the other contact device switches between operating and stopping the power window closing operation. .

Here, for the following explanation, three axes (a first axis A1, a second axis A2, and a third axis A3) are defined in the electromagnetic relay 1, as shown in FIG. 2 and the like. The first axis A1 is a virtual axis along which an iron core 10 (described later) of the electromagnetic relay 1 extends (see FIG. 6). The second axis A2 is a virtual axis along which a movable unit 4, which will be described later, and a fixed block 5, which will be described later, are lined up (see FIG. 2). The second axis A2 intersects with the first axis A1, and in this embodiment, is perpendicular to the first axis A1. The third axis A3 is a virtual axis that intersects both the first axis A1 and the second axis A2. In this embodiment, the third axis A3 is orthogonal to both the first axis A1 and the second axis A2.

Moreover, for the following explanation, as shown in FIG. 2 and the like, the top, bottom, left and right, and front and back of the electromagnetic relay 1 are defined. The "top" of the electromagnetic relay 1 is the side on which the armature 63, which will be described later, is located when viewed from the iron core 10, which will be described later, in the first axis A1. The "bottom" of the electromagnetic relay 1 is the side on which the iron core 10 is located when viewed from the armature 63 in the first axis A1. Further, the "left" of the electromagnetic relay 1 is the side on which the fixed block 5 is located when viewed from the movable unit 4 in the second axis A2. The "right" side of the electromagnetic relay 1 is the side on which the movable unit 4 is located when viewed from the fixed block 5 in the second axis A2. Moreover, the "front" and "rear" of the electromagnetic relay 1 refer to one and the other on both sides of the third axis A3.

In addition, in the present disclosure, "top view" refers to viewing from above along the first axis A1, and "side view" refers to viewing from the right or left along the second axis A2. Okay, "front view" means looking from the front along the third axis A3.

The three axes (first axis A1, second axis A2, and third axis A3) of the electromagnetic relay 1 and the vertical, horizontal, front and rear sides of the electromagnetic relay 1 are axes defined for convenience of explanation. and side, and is not intended to limit the axis and side when the electromagnetic relay 1 is actually used.

As shown in FIGS. 1 and 2, the electromagnetic relay 1 includes a relay body 2 and a case 3.

The relay main body 2 is a device that includes a plurality of pairs of the contact device and a drive device for driving the contact device. The contact device includes a movable block 6, which will be described later, and an individual fixed block 50, which will be described later (see FIG. 3). The drive device is composed of an electromagnetic block 7, which will be described later (see FIG. 3). The relay main body 2 has a rectangular parallelepiped shape, for example. Case 3 houses relay body 2. The case 3 is, for example, in the shape of a rectangular parallelepiped box with an open bottom. The relay main body 2 is housed inside the case 3 through an opening 3a (FIG. 2) on the bottom surface of the case 3.

As shown in FIGS. 2 to 5, the relay main body 2 includes a plurality of (for example, two) movable units 4 and a fixed block 5.

The movable unit 4 is a unit that includes movable contacts M1 and M2 and operates the movable contacts M1 and M2. The movable unit 4 includes a movable block 6 and an electromagnetic block 7. The movable block 6 is a block that constitutes the movable contacts M1 and M2. The electromagnetic block 7 is a block that operates the movable contacts M1 and M2 using electromagnetic force. The plurality of movable units 4 are arranged in line along the third axis A3. In this embodiment, the plurality of movable units 4 have the same configuration, but are not limited to the same configuration.

The fixed block 5 is a block that includes a plurality of sets of fixed contacts F1 and F2, one set of fixed contacts F1 and F2, and holds the plurality of sets of fixed contacts F1 and F2. The plurality of sets of fixed contacts F1 and F2 correspond one-to-one to the plurality of movable units 4. The fixed block 5 has a plurality of individual fixed blocks 50 in one-to-one correspondence with the plurality of movable units 4. The individual fixed block 50 is a block portion that includes fixed contacts F1 and F2 that constitute movable contacts M1 and M2 of the corresponding movable unit 4 and opening/closing contacts, and holds the fixed contacts F1 and F2. The plurality of individual fixed blocks 50 are configured to be aligned and integrated along the third axis A3. The plurality of movable units 4 are connected to the corresponding individual fixed blocks 50 in the fixed block 5 from the right side of the corresponding individual fixed blocks 50. In this embodiment, the plurality of individual fixed blocks 50 have the same configuration, but are not limited to the same configuration.

The individual fixed blocks 50 and movable units 4 that correspond to each other constitute one independent relay device. That is, the relay body 2 includes a plurality of independent relay devices. Each of these multiple independent relay devices includes a coil 8, a bobbin 9, fixed contacts F1, F2, movable contacts M1, M2, and coil terminals 12A, 12B, which will be described later. Therefore, the electromagnetic relay 1 includes a plurality of sets of a coil 8, a bobbin 9, fixed contacts F1, F2, movable contacts M1, M2, and coil terminals 12A, 12B, which will be described later.

(3) Details of electromagnet block As shown in FIGS. 5 and 6, the electromagnet block 7 includes a coil 8, a bobbin 9, an iron core 10, a yoke 11, and two coil terminals 12A and 12B.

(3-1) Bobbin As shown in FIGS. 5 and 6, the bobbin 9 includes a main body part 91 around which the coil 8 is wound, an upper collar part 92 provided on the upper part of the main body part 91, and a main body part 91. It has a lower collar part 93 provided at the lower part. The main body portion 91, the upper flange portion 92, and the lower flange portion 93 are integrally formed as a molded body of synthetic resin having electrical insulation properties.

The main body portion 91 has a hollow cylindrical shape whose axis is along the first axis A1. The iron core 10 is arranged in the internal space of the main body part 91. A coil 8 is wound around the outer periphery of the main body portion 91 . Therefore, the coil 8 is wound around the iron core 10.

The upper flange portion 92 includes an upper flange main body 921 and a connecting protrusion 922 .

The upper flange main body 921 has a substantially rectangular plate shape when viewed from above, and protrudes from the upper end of the main body 91 toward the outer circumferential side of the main body 91 . The upper flange main body 921 has a circular through hole 92a connected to the internal space of the main body portion 91 at the center of its upper surface. Around the through hole 92a on the upper surface of the upper collar main body 921, a circular arrangement recess 92b, in which a magnetic pole part 102 (described later) of the iron core 10 is arranged, is provided.

The connecting protrusion 922 is a portion that is inserted into a connecting recess 51g, which will be described later, of the fixed block 5. The connecting protrusion 922 protrudes to the left from an appropriate location (for example, near the front end) on the left end surface of the upper flange main body 921. The connecting protrusion 922 has a plate shape with a substantially L-shaped cross section perpendicular to the second axis A2 along the protruding direction.

The lower flange portion 93 is, for example, shaped like a hollow rectangular parallelepiped (for example, a flat rectangular parallelepiped). The lower flange portion 93 protrudes from the lower end of the main body portion 91 toward the outer circumferential side of the main body portion 91 . The right end surface of the lower flange portion 93 is open. That is, the lower flange portion 93 has an opening 93a on the right end surface. A second yoke 112 of the yoke 11, which will be described later, is accommodated in the inner space of the lower flange portion 93 through the opening 93a.

The lower collar portion 93 further includes a cutout portion 93b and a circular communication hole 93c (see FIGS. 5 and 6).

The notch 93b is a portion where a first yoke 111 (described later) of the yoke 11 is arranged, and is provided at the edge of the upper surface of the lower flange 93 on the opening 93a side (right side).

The communication hole 93c is provided at the center of the upper surface of the lower flange portion 93 so as to connect the internal space of the main body portion 91 and the internal space of the lower flange portion 93.

In addition, the lower collar portion 93 further includes a fitting protrusion 93d, two holding grooves 93f, 93g, two notches 93h, two recesses 93i, and two protrusions 93j (see FIG. 7 - see Figure 10). Further, the lower flange portion 93 has a left end surface 93L and a lower surface 93p. The left end surface 93L and the lower surface 93p are surfaces that are different from each other and intersect (for example, orthogonally) with each other. The left end surface 93L is a surface from which the wire winding portions 122 of the coil terminals 12A, 12B protrude, as described later. The lower surface 93p is a surface from which the external connection portions 123 of the coil terminals 12A and 12B protrude, as described later.

The fitting protrusion 93d is formed by the left edge of the lower flange 93, and is a portion that fits into a fitting recess 51c of the fixed block 5, which will be described later.

The two holding grooves 93f and 93g correspond one-to-one to the two coil terminals 12A and 12B, and hold the corresponding coil terminal 12A or 12B. The two holding grooves 93f and 93g are provided on the left end surface 93L of the lower collar portion 93, and are arranged side by side along the third axis A3. The two holding grooves 93f and 93g are each L-shaped (in the examples of FIGS. 8 and 10, L-shaped with virtual image symmetry with each other). Each holding groove 93f, 93g has a first groove part 931 and a second groove part 932. The first groove portion 931 is a groove portion parallel to the upper surface of the lower flange portion 93. The second groove portion 932 is a groove portion extending downward from one end (front end or rear end) of the third axis A3 of the first groove portion 931. In this embodiment, in the holding groove 93f, the second groove part 932 extends downward from the front end of the first groove part 931, and in the holding groove 93g, the second groove part 932 extends from the rear end of the first groove part 931. It extends along the bottom. The lower end of the second groove portion 932 is open at the lower surface 93p of the lower collar portion 93.

The two notches 93h correspond one-to-one to the two holding grooves 93f and 93g. The cutout portion 93h cuts the upper wall portion of the corresponding holding groove 93f or 93g (that is, the portion between the upper inner surface of the corresponding first groove portion 931 and the upper surface of the lower flange portion 93) from the left end to the right side in a rectangular concave shape when viewed from above. It is provided with a cutout. The two notches 93h overlap the corresponding holding grooves 93f or 93g when viewed from above. The depth of the notch 93h (width in the second axis A2) is smaller than the depth (depth in the second axis A2 direction) of the corresponding holding groove 93f or 93g. The width of the notch 93h (width in the third axis A3 direction) is smaller than the width (width in the third axis A3 direction) of the corresponding holding groove 93f or 93g.

The two recesses 93i are formed on the left end surface of the lower flange 93 of the bobbin 9 when the sealant 13 (see FIGS. 13 and 14) is applied to the lower surface 2a (see FIGS. 13 and 14) of the relay body 2. 93L is a recessed portion for storing sealant 13 that has entered the root of the conductive wire winding portion 122 (described later) of the coil terminals 12A, 12B.

The two recesses 93i correspond one-to-one to the two holding grooves 93f and 93g. The recess 93i is recessed toward the right side in the left end surface 93L of the lower collar portion 93, and is provided adjacent to the corresponding holding groove 93f or 93g. Therefore, the recess 93i is provided on the left end surface 93L of the lower flange 93 so as to be adjacent to a connecting portion 121e (described later) of the coil terminal 12A or 12B held in the corresponding holding groove 93f or 93g.

In this embodiment, the recess 93i is adjacent to the lower side of the corresponding holding groove 93f or 93g (the lower surface 93p side of the lower flange 93) on the left end surface 93L of the lower flange 93. Therefore, the upper surface of the recess 93i is open at the lower inner surface 93k of the corresponding holding groove 93f or 93g. In other words, the recess 93i is adjacent to the lower side of the connecting portion 121e (described later) of the coil terminal 12A or 12B held in the corresponding holding groove 93f or 93g on the left end surface 93L of the lower collar portion 93.

Here, "the recess 93i is adjacent to the connecting part 121e of the coil terminal 12B on the left end surface 93L of the lower flange 93" means that the connecting part 121e is exposed in the internal space of the recess 93i. It is that you are.

The recess 93i has an inner surface 93m facing the corresponding retaining groove 93f or 93g. The inner surface 93m is inclined with respect to the lower inner surface 93k of the corresponding holding groove 93f or 93g. In other words, the recess 93i has an inner surface 93m that faces a connecting portion 121e (described later) of the coil terminal 12A or 12B held in the corresponding holding groove 93f or 93g. The inner surface 93m is inclined with respect to the connecting portion 121e.

More specifically, the inner surface 93m extends from the back side of the recess 93i toward the left end surface 93L side where the recess 93i is provided, and the distance between the lower inner surface 93k of the corresponding holding groove 93f or 93g (i.e., It is inclined so that the distance (distance) D1 from the connecting portion 121e to the connecting portion 121e becomes large. Thereby, the internal space of the recess 93i can be gradually increased while gradually decreasing the thickness D8 (see FIG. 9) of the wall portion constituting the inner surface 93m of the bobbin 9. As a result, the recess 93i can be provided while achieving both the strength of the bobbin 9 and the width of the internal space of the recess 93i.

The two protrusions 93j (see FIG. 10) correspond one-to-one to the two holding grooves 93f and 93g. Each protruding portion 93j is provided at the center of the third axis A3 on the bottom surface 93q (inner surface) of the corresponding holding groove 93f, 93g, and protrudes toward the left end surface 93L of the lower collar portion 93. The protrusion 93j is a portion that fits into a recess 121f (described later) of the coil terminal 12A or 12B disposed in the corresponding holding groove 93f or 93g.

(3-2) Coil The coil 8 is a component that generates electromagnetic force for operating the movable contacts M1 and M2. As shown in FIGS. 5 and 6, the coil 8 is wound around the main body 91 of the bobbin 9. The coil 8 is formed by winding a conducting wire around the main body portion 911 of the bobbin 9 . The coil 8 has a first leader line and a second leader line. The first lead wire of the coil 8 is one end of the conductive wire, and is connected to one of the two coil terminals 12A and 12B. The second lead wire of the coil 8 is the other end of the conductive wire, and is connected to the other of the two coil terminals 12A, 12B.

(3-3) Coil Terminals The two coil terminals 12A and 12B are members for connecting the first lead-out part and the second lead-out part of the coil 8 to an external control device. The coil terminal 12A is connected to the first lead wire of the coil 8, and the coil terminal 12B is connected to the second lead wire of the coil 8. For example, the coil terminals 12A and 12B have virtual image symmetry with each other.

The two coil terminals 12A and 12B correspond one-to-one to the two holding grooves 93f and 93g provided on the left end surface 93L of the lower flange portion 93, and are press-fitted into the corresponding holding grooves 93f or 93g to be held (i.e., fixed). ) (see Figures 7 and 8).

As shown in FIG. 8, the coil terminals 12A and 12B have a base portion 121, a conductive wire winding portion 122, and an external connection portion 123.

The base portion 121 is a portion held in the corresponding holding groove 93f or 93g. The base 121 is, for example, plate-shaped in an L-shape when viewed from the side, and includes a first plate part 121a and a second plate part 121b. The first plate portion 121a is a portion disposed in the first groove portion 931 of the corresponding holding groove 93f or 93g. The second plate portion 121b is a portion disposed in the second groove portion 932 of the corresponding holding groove 93f or 93g. The second plate portion 121b protrudes downward from one end (front end or rear end) of the third axis A3 of the first plate portion 121a. In this embodiment, in the coil terminal 12A, the second plate part 121b protrudes downward from the front end of the first plate part 121a, and in the coil terminal 12B, the second plate part 121b protrudes from the front end of the first plate part 121a. It protrudes downward from the rear end.

The conductive wire winding portion 122 is a portion around which the first lead-out portion or the second lead-out portion of the coil 8 is wound. The conductive wire winding portion 122 is, for example, rod-shaped, and protrudes (extends) to the left from the center of the left end surface of the base portion 121 (more specifically, from the center of the left end surface of the first plate portion 121a). The conductive wire winding portion 122 protrudes to the left from the left end surface 93L of the lower collar portion 93.

The external connection section 123 is a section connected to an external control device. The external connection portion 123 has, for example, an elongated plate shape, and protrudes (extends) downward from one end portion of the third axis A3 of the base portion 121 (more specifically, from the lower end of the second plate portion 121b). The external connection portion 123 projects downward from the lower surface 93p of the lower collar portion 93.

The first plate portion 121a will be explained in more detail.

The first plate portion 121a has a plurality of (for example, two) fitting portions 121d, a connecting portion 121e, and a recessed portion 121f. In addition, in this embodiment, although the case where several fitting parts 121d are provided is illustrated, the number of fitting parts 121d may be one. In this case, the recess 121f is not provided.

The plurality of fitting portions 121d are portions that fit into the first groove portions 931 of the corresponding holding grooves 93f or 93g. Each fitting portion 121d has, for example, a rectangular flat plate shape when viewed from above. The plurality of fitting parts 121d are arranged in line along the third axis A3. Here, the third axis A3 is an axis that intersects (orthogonally in this embodiment) the second axis A2 along the direction in which the conductive wire winding portion 122 protrudes. Further, in this embodiment, the third axis A3 is also an axis that also intersects (perpendicularly intersects in this embodiment) the first axis A1 along the extending direction of the external connection portion 123.

Of the two fitting parts 121d, a protrusion 121g is provided on the side surface of the fitting part 121d on the side opposite to the external connection part 123 (see FIG. 8). The protrusion 121g presses the side surface of the corresponding holding groove 93f or protrusion 93j of 93g opposite to the second groove 932 toward the second groove 932 (see FIG. 10). As a result, of the two fitting parts 121d, the fitting part 121d on the external connection part 123 side is accurately positioned by the side surface on the second groove part 932 side of the protruding part 93j of the corresponding holding groove 93f or 93g. .

The connecting portion 121e is a portion that connects the plurality of fitting portions 121d and the conductive wire winding portion 122. The connecting portion 121e has, for example, a rectangular flat plate shape when viewed from above. The left ends of the plurality of fitting parts 121d are connected to the right end surface of the connecting section 121e, and the right end of the conductive wire winding section 122 is connected to the center of the left end surface of the connecting section 121e.

The recessed portion 121f is a portion into which the protruding portion 93j of the corresponding holding groove 93f or 93g fits, and is provided between the adjacent fitting portions 121d. The corresponding coil terminal 12A or 12B is positioned with respect to the bobbin 9 by fitting the recess 121f and the protrusion 93j.

(3-4) Iron core As shown in FIG. 4, the iron core 10, together with the yoke 11 and the later-described armature 63 of the movable block 6, forms a magnetic circuit through which the magnetic flux generated by the coil 8 passes. The iron core 10 is inserted into the main body portion 91 of the bobbin 9 along the first axis A1.

As shown in FIG. 6, the iron core 10 is formed, for example, in a substantially cylindrical shape. More specifically, the core 10 includes, for example, a cylindrical core body 101, a magnetic pole portion 102, and a narrow diameter portion 103. The magnetic pole portion 102 is a portion that attracts a later-described armature 63 of the movable block 6 by the electromagnetic force of the coil 8 . The magnetic pole portion 102 has a disk shape, for example, and protrudes from the upper end of the core body 101 toward the outer circumferential side of the core body 101. The magnetic pole part 102 is arranged in the arrangement recess 92b of the upper collar part 92 of the bobbin 9 and exposed above the bobbin 9. The narrow diameter portion 103 is a portion that fits into a fitting hole 113, which will be described later, of the yoke 11. The narrow diameter portion 103 has a smaller diameter than the core body 101 and protrudes downward from the lower end of the core body 101.

(3-5) Yoke As shown in FIG. 4, the yoke 11, together with the iron core 10 and the later-described armature 63 of the movable block 6, constitutes a magnetic circuit through which the magnetic flux generated by the coil 8 passes. As shown in FIG. 6, the yoke 11 is made of a magnetic material (for example, iron) and is L-shaped when viewed from the front. The yoke 11 includes a first yoke 111 and a second yoke 112.

The first yoke 111 is a portion disposed in the notch 93b of the lower collar portion 93. The first yoke 111 has a rectangular plate shape when viewed from the side. The second yoke 112 is a portion that is inserted into the internal space of the lower flange 93 from the opening 93a of the lower flange 93 of the bobbin 9. The second yoke 112 has a rectangular plate shape when viewed from above, and protrudes to the left from the lower end of the first yoke 111.

The yoke 11 has a fitting hole 113 and a plurality of (for example, two) fixing protrusions 114.

The fitting hole 113 is a hole into which the narrow diameter portion 103 of the iron core 10 fits. The fitting hole 113 is provided so as to penetrate through the second yoke 112 along the first axis A1. With the second yoke 112 inserted into the internal space of the lower flange 93, the iron core 10 is inserted through the through hole 92a of the upper flange 92 of the bobbin 9, so that the narrow diameter portion 103 of the iron core 10 is inserted into the inner space of the lower flange 93. It is fitted into the fitting hole 113 of the second yoke 112.

The plurality of fixing protrusions 114 are protrusions for fixing the movable block 6 to the right side of the first yoke 111. The plurality of fixed protrusions 114 are provided at both ends (front end and rear end) of the third shaft A3 on the right surface of the first yoke 111.

(4) Details of Movable Block As shown in FIG. 5, the movable block 6 includes a movable spring 61, a movable contact member 62, and an armature 63.

(4-1) Movable Spring The movable spring 61 is a member that supports the movable contact member 62 and the armature 63 so that they operate. As shown in FIG. 5, the movable spring 61 includes a fixed portion 611, an external connection portion 612, a spring portion 613, and a movable piece 614. The fixed part 611, the external connection part 612, the spring part 613, and the movable piece 614 are integrally formed of a conductive metal material.

The fixing part 611 is a part fixed to the first yoke 111 of the yoke 11, and has a rectangular plate shape, for example. The fixing part 611 has two fixing holes 611a into which the two fixing protrusions 114 of the first yoke 111 are inserted. By inserting the two fixed protrusions 114 of the yoke 11 into the two fixing holes 611a from the left side and crushing the tips of the fixed protrusions 114, the movable spring 61 (i.e., the movable block 6) is attached to the yoke 11 (i.e., the electromagnetic block). 7) is fixed.

The external connection unit 612 is a part that is connected to an external electrical device (that is, an electrical device to be controlled). The external connection part 612 has a rectangular plate shape, for example, and protrudes downward from the lower end of the fixing part 611. The external connection portion 612 protrudes downward from the case 3 (see FIG. 1).

The spring portion 613 is an elastically flexible portion to move the movable piece 614 up and down. The spring portion 613 has a plate shape curved into an inverted L shape when viewed from the front. One end of the spring portion 613 extends downward from the curved portion of the spring portion 613 and is connected to the upper end of the fixed portion 611 . The other end of the spring portion 613 extends to the left from the curved portion of the spring portion 613 and is connected to the right end of the movable piece 614 .

The movable piece 614 is a portion that moves up and down while holding (i.e., fixing) the movable contact member 62 and the armature 63. The movable piece 614 has a plate shape extending leftward from the left end of the spring portion 613. The joint between the movable piece 614 and the spring portion 613 is bent in a V-shape when viewed from the front.

The movable piece 614 includes an armature holding part 614a and a contact holding part 614b.

The armature holding portion 614a is a portion that holds the armature 63 and is a portion on the right side of the movable piece 614. A plurality of (for example, two) fixing holes 614c for holding the armature 63 are formed in the armature holding portion 614a in a line along the third axis A3.

The contact holding portion 614b is a portion that holds the movable contact member 62 and is a portion on the left side of the movable piece 614. The contact holding portion 614b has a through hole for holding the movable contact member 62. The joint between the armature holding part 614a and the contact holding part 614b is bent in a stepped manner, and due to this bending, the contact holding part 614b is lowered below the armature holding part 614a.

(4-2) Movable contact member The movable contact member 62 is a part that constitutes the movable contacts M1 and M2. The movable contact member 62 is fixed (held) in the through hole of the contact holder 614b of the movable spring 61 so as to protrude upward and downward from both upper and lower surfaces of the contact holder 614b. The upwardly protruding portion and the downwardly protruding portion of the movable contact member 62 are each formed, for example, in the shape of a truncated cone. The upper surface of the movable contact member 62 functions as the first movable contact M1, and the lower surface functions as the second movable contact M2. The first movable contact M1 contacts and separates from a first fixed contact F1, which will be described later, of the fixed block 5. The second movable contact M2 is a movable contact different from the first movable contact M1, and operates together with the first movable contact M1 to contact and separate from a second fixed contact F2, which will be described later, on the fixed block 5.

(4-3) Armature As shown in FIG. 4, the armature 63, together with the iron core 10 and the yoke 11, forms a magnetic circuit through which the magnetic flux generated by the coil 8 passes. The armature 63 moves up and down depending on the presence or absence of magnetic attraction between it and the iron core 10, thereby moving the movable piece 614 of the movable spring 61 up and down, thereby moving the movable contacts M1 and M2 up and down.

As shown in FIG. 5, the armature 63 is made of a magnetic material and is, for example, formed into a substantially rectangular plate shape when viewed from above. The armature 63 is held (fixed) on the lower surface of the armature holding portion 614a. Furthermore, with the movable block 6 fixed to the electromagnetic block 7 , the armature 63 is disposed above the magnetic pole portion 102 of the iron core 10 .

The armature 63 includes an armature main body 631, a plurality of (for example, two) fixing protrusions 632, and a plurality of (for example, two) hooking pieces 633. The armature main body 631, the two fixed protrusions 632, and the two hook pieces 633 are integrally formed of a magnetic material.

The armature main body 631 has a substantially rectangular plate shape when viewed from above. The two fixing protrusions 632 are provided side by side along the third axis A3 on the upper surface of the armature main body 631. By inserting the two fixing protrusions 632 of the armature 63 into the two fixing holes 614c of the armature holding part 614a and crushing the tips of the fixing protrusions 632, the armature 63 is held (fixed) in the armature holding part 614a. ) to be done.

The two hooking pieces 633 are portions that protrude downward from the front and rear ends of the right side of the armature main body 631 and hook onto the upper end of the right side of the first yoke 111. By hooking the two hook pieces 633 to the upper end portion of the right side of the first yoke 111, the armature 63 can rotate around the hook pieces 633 as a fulcrum depending on the presence or absence of magnetic attraction between it and the iron core 10 ( In other words, it can move up and down). As a result, the movable piece 614 of the movable spring 61 moves up and down together with the armature 63. As a result, the movable contacts M1 and M2 move up and down together with the movable piece 614.

(5) Fixed Block As shown in FIGS. 3, 4, and 11, the fixed block 5 includes the plurality of individual fixed blocks 50 described above. Furthermore, the fixed block 5 includes a holding member 51, a plurality (for example, two) of first fixed terminals 52, and a plurality of (for example, two) second fixed terminals 53.

(5-1) Holding member As shown in FIGS. 3, 4, and 11, the holding member 51 is, for example, in the shape of a block having a substantially rectangular parallelepiped shape (flat substantially rectangular parallelepiped shape). The holding member 51 has a left main surface 51a (first surface) and a right main surface 51b (second surface) that face each other. The holding member 51 is made of synthetic resin having electrical insulation properties.

The holding member 51 includes a holding member main body 511 and a plurality of (for example, two) protruding wall portions 512.

The holding member main body 511 has a block shape of a substantially rectangular parallelepiped (flat substantially rectangular parallelepiped shape). The holding member main body 511 has a plurality of holding blocks 513 connected in line along the third axis A3. The plurality of holding blocks 513, the plurality of projecting wall parts 512, the plurality of first fixed terminals 52, and the plurality of second fixed terminals 53 correspond to each other one-to-one. The individual fixed block 50 is composed of a holding block 513, a first fixed terminal 52, and a second fixed terminal 53 that correspond to each other. The plurality of holding blocks 513 are blocks that correspond one-to-one with the plurality of movable units 4 and are connected to the corresponding movable units 4.

The plurality of protruding wall portions 512 protrude upward from the upper surface of the holding member main body 511, and are arranged at regular intervals along the third axis A3 on the upper surface of the holding member main body 511. That is, the plurality of protruding wall portions 512 protrude upward from the front end of the upper surface of the corresponding holding block 513.

The holding member 51 has, on its right main surface 51b, a fitting recess 51c, a plurality (for example, two) of coil accommodating recesses 51d, a plurality of (for example, two) terminal accommodating recesses 51e, and a plurality of (for example, two) terminal accommodating recesses 51e. It has an engagement hole 51f and a plurality (for example, two) of connecting recesses 51g (see FIG. 3). The plurality of coil accommodating recesses 51d, the plurality of terminal accommodating recesses 51e, and the plurality of engagement holes 51f each correspond one-to-one with the plurality of holding blocks 513.

The fitting recess 51c is a portion into which the fitting protrusion (left edge of the lower flange 93) 93d of each bobbin 9 of the plurality of movable units 4 fits. The fitting recess 51c is provided at the lower part of the right main surface 51b of the holding member 51, and extends between the front end and the rear end of the right main surface 51b. That is, the fitting recess 51c is provided across the lower part of the right main surface of each holding block 513.

The plurality (for example, two) of coil accommodating recesses 51d are portions that accommodate the left side surface of the coil 8 of the corresponding movable unit 4. The plurality of coil accommodating recesses 51d are provided in the right main surface 51b of the holding member 51 in parallel with each other along the third axis A3. That is, the plurality of coil accommodating recesses 51d are provided on the right main surface of the corresponding holding block 513. The plurality of coil accommodating recesses 51d extend along the first axis A1 on the right main surface 51b of the holding member 51 between the upper end of the fitting recess 51c and the upper surface of the holding member main body 511.

The plurality (for example, two) of terminal accommodating recesses 51e are portions that accommodate the conductor winding portions 122 of the two coil terminals 12A, 12B of the corresponding movable unit 4. Each of the plurality of terminal accommodating recesses 51e is provided below the corresponding coil accommodating recess 51d on the bottom surface (back surface) of the fitting recess 51c. The plurality of terminal accommodating recesses 51e are provided on the bottom surface (back surface) of the fitting recess 51c.

The plurality (for example, two) of engagement holes 51f are portions that engage with engagement protrusions provided on the lower surface of the fitting protrusion 93d of the bobbin 9 of the corresponding movable unit 4. The plurality of engagement holes 51f are provided so as to penetrate in the first axis A1 direction in the lower wall portion of the fitting recess 51c.

The plurality of (for example, two) connecting recesses 51g are portions into which the connecting protrusions 922 of the bobbin 9 of the corresponding movable unit 4 are inserted. The plurality of connecting recesses 51g are provided on the right end surfaces of the plurality of projecting wall parts 512. The connecting recess 51g has an L-shape in side view in accordance with the L-shape of the connecting protrusion 922 in side view.

The right main surface 51b of the holding member 51 is provided with a recess 51h. In this embodiment, the holding member 51 is formed by injection molding using a mold. That is, the holding member 51 is formed by pouring molten resin (molding material) into the mold from the gate of the mold, and cooling and solidifying the poured molten resin. The gate is arranged on the right main surface 51b of the holding member 51. The recessed portion 51h is a recessed portion for preventing unnecessary portions formed on the right main surface 51b of the holding member 51 by molding material remaining in the gate of the mold used during injection molding of the holding member 51. That is, by forming the unnecessary portion on the bottom surface of the recess 51h, the unnecessary portion is prevented from protruding from the right main surface 51b. In this embodiment, the recessed portion 51h is provided, for example, in the center of the right main surface 51b of the holding member 51 (for example, in a portion that overlaps with the rear holding groove 53i when viewed from the side).

The holding member 51 has a plurality (for example, two) of holding grooves 51i, a plurality of terminal accommodating recesses 51j, and a plurality of holding recesses 51k on its left main surface 51a (see FIG. 11). The plurality of holding grooves 51i, the plurality of terminal accommodating recesses 51j, and the plurality of holding recesses 51k each correspond one-to-one with the plurality of holding blocks 513.

The plurality of (for example, two) holding grooves 51i are portions that hold the corresponding first fixed terminals 52. The plurality of holding grooves 51i are provided on the left main surface 51a of the holding member 51 so as to be recessed toward the right main surface 51b. The plurality of holding grooves 51i are provided along the first axis A1 between the upper surface of the corresponding projecting wall portion 512 and the lower surface of the holding member main body 511. The upper end of the retaining groove 51i is open at the upper surface of the projecting wall portion 512, and the lower end of the retaining groove 51i is open at the lower surface of the retaining member main body 511.

As shown in FIG. 12, the holding groove 51i has a bottom surface 51m and a pair of inner surfaces 51n. The bottom surface 51m is the inner surface of the holding groove 51i in the depth direction (second axis A2). The pair of inner surfaces 51n are a pair of inner surfaces facing each other in the width direction (third axis A3) of the holding groove 51i. The holding groove 51i has a protrusion 51p and two fitting recesses (a first fitting recess 51q and a second fitting recess 51r) on its bottom surface 51m.

The protruding portion 51p protrudes from the bottom surface 51m of the holding groove 51i in the depth direction (second axis A2) toward the opening surface of the holding groove 51i (that is, toward the left main surface 51a of the holding member 51). The protruding portion 51p has, for example, a rectangular shape when viewed from the front (that is, when viewed from the third axis A3). That is, the protruding portion 51p protrudes from the bottom surface 51m of the holding groove 51i in a rectangular shape when viewed from the front. The protruding portion 51p is connected to a pair of inner side surfaces 51n in the width direction of the holding groove 51i.

The first fitting recess 51q and the second fitting recess 51r are portions into which two protrusions (a first protrusion 521d and a second protrusion 521e), which will be described later, of the first fixed terminal 52 fit. The first fitting recess 51q and the second fitting recess 51r are arranged on both sides above and below the protrusion 51p. That is, the first fitting recess 51q and the second fitting recess 51r are spaced apart from each other in the vertical direction, and the protrusion 51p is located between the first fitting recess 51q and the second fitting recess 51r. It is located in

As shown in FIG. 11, the plurality (for example, two) of terminal accommodating recesses 51j are portions in which the corresponding second fixed terminals 53 are accommodated. The plurality of terminal accommodating recesses 51j are arranged on the left main surface 51a of the holding member 51 on the rear side of the corresponding holding groove 51i. The terminal accommodating recess 51j has a side view shape that roughly corresponds to the shape of a base 531a (described later) of the second fixed terminal 53 (for example, a substantially rectangular shape). The upper end of the terminal accommodating recess 51j is open on the upper surface of the holding member main body 511, and a part of the lower end of the terminal accommodating recess 51j is open on the lower surface of the holding member main body 511.

The plurality of (for example, two) holding recesses 51k are portions into which the later-described holding pieces 531d of the second fixed terminals 53 accommodated in the corresponding terminal accommodating recesses 51j are inserted. The plurality of holding recesses 51k are provided on the bottom surface of the corresponding terminal accommodating recess 51j. The plurality of holding recesses 51k are provided along the first axis A1 at predetermined locations on the bottom surface of the corresponding terminal accommodating recesses 51j.

(5-2) First fixed terminal As shown in FIG. 11, each of the plurality of first fixed terminals 52 includes a first fixed contact F1 that constitutes a switching contact with the movable contact M1 of the corresponding movable unit 4, and This is a component that supports the first fixed contact F1. The first fixed terminal 52 includes a terminal main body 521 and a first fixed contact member 522. The terminal main body 521 has a base 521a, a contact holding part 521b, an external connection part 521c, two protrusions (a first protrusion 521d and a second protrusion 521e), and a recess 521f.

The base portion 521a is a portion disposed in the corresponding holding groove 51i of the holding member 51, and has a substantially rectangular plate shape when viewed from the front, for example. The contact holding portion 521b is a portion that holds (fixes) the first fixed contact member 522. The contact holding portion 521b has a substantially rectangular plate shape when viewed from above, for example, and protrudes rearward from the upper end of the base portion 521a. The contact holding portion 521b is arranged above the upper surface of the corresponding holding block 513 of the holding member 51. The contact holding part 521b has a through hole for holding (fixing) the first fixed contact member 522. The external connection section 521c is a section connected to an external device to be controlled. The external connection portion 521c has, for example, a rectangular flat plate shape when viewed from the front, and protrudes downward from the lower end of the base portion 521a. The external connection portion 521c protrudes downward from the lower surface of the holding member 51.

The first protrusion 521d and the second protrusion 521e are parts that fit into the first fitting recess 51q and the second fitting recess 51r (see FIG. 12) of the holding groove 51i. The first protrusion 521d and the second protrusion 521e are provided at the right end of the base 521a so as to protrude to the right (that is, the side facing the bottom surface 51m of the holding groove 51i). Further, the first protrusion 521d and the second protrusion 521e are spaced apart from each other along the right end of the base 521a.

The first protrusion 521d and the second protrusion 521e each have a tapered portion 521g on the protrusion side edge (that is, the right edge). The tapered portion 521g is a portion that guides the first protrusion 521d and the second protrusion 521e to be press-fitted into the first fitting recess 51q and the second fitting recess 51r of the holding groove 51i. The thickness of the tapered portion 521g (that is, the width of the third axis A3) is smaller toward the protruding side (right end side) of the tapered portion 521g.

The recessed portion 521f is a portion where the protruding portion 51p (see FIG. 12) of the holding groove 51i is arranged. In this embodiment, the recess 521f fits into the protrusion 51p when viewed from the front (see FIG. 12). The recess 521f is provided at the right end of the base 521a (that is, the end facing the bottom surface 51m of the holding groove 51i) so as to be recessed toward the left end of the base 521a (that is, the side opposite to the right end of the base 521a). There is. The recess 521f is arranged between the first protrusion 521d and the second protrusion 521e.

The depth D2 (see FIG. 12) of the recessed portion 521f is equal to or smaller than the width L2 of the tapered portion 521g of each of the first protrusion 521d and the second protrusion 521e.

In other words, the first fixed terminal 52 has a tapered portion 52a at its right end. The tapered portion 52a protrudes toward the bottom surface 51m of the holding groove 51i at the right end portion of the first fixed terminal 52. Further, the tapered portion 52a is formed along the right end portion of the first fixed terminal 52 in a certain range of the right end portion of the first fixed terminal 52 (for example, at the center of the right end portion of the base portion 521a). The thickness of the third axis A3 (in the width direction of the holding groove 51i) of the tapered portion 52a is thinner toward the side where the tapered portion 52a protrudes (ie, toward the right side). The recess 521f of the first fixed terminal 52 is provided so as to be recessed toward the left side (that is, toward the left end of the first fixed terminal 52) at the right end of the first fixed terminal 52. The recessed portion 521f is provided in the tapered portion 52a, and in this embodiment, as an example, the recessed portion 521f is provided only in the tapered portion 52a. In the first fixed terminal 52, the upper and lower sides of the recess 521f formed in this way become the first protrusion 521d and the second protrusion 521e, and the tapered parts 52a on the upper and lower sides of the recess 521f become the first protrusion 521d. and each tapered portion 521g of the second protrusion 521e.

As shown in FIG. 11, the first fixed contact member 522 is a member that constitutes the first fixed contact F1. The first fixed contact member 522 has, for example, a substantially truncated conical shape. The first fixed contact member 522 is fixed (held) in the through hole of the contact holding part 521b so as to protrude downward from the lower surface of the contact holding part 521b. The lower surface of the first fixed contact member 522 functions as the first fixed contact F1.

(5-3) Second fixed terminal As shown in FIG. 11, each of the plurality of second fixed terminals 53 includes a second fixed contact F2 that constitutes a switching contact with the movable contact M2 of the corresponding movable unit 4. This is a component that supports the second fixed contact F2. The second fixed terminal 53 is a fixed terminal different from the first fixed terminal 52. The second fixed contact F2 is a different fixed contact from the first fixed contact F1. The second fixed terminal 53 has a terminal main body 531 and a second fixed contact member 532. The terminal main body 531 includes a base portion 531a, a contact holding portion 531b, an external connection portion 531c, and a holding piece 531d.

The base portion 531a is a portion disposed in the corresponding terminal accommodating recess 51j of the holding member 51, and has a rectangular plate shape in a side view, for example. The contact holding portion 531b is a portion that holds the second fixed contact member 532. The contact holding portion 531b has a rectangular plate shape when viewed from above, for example, and protrudes to the right from the upper end of the base portion 531a. The contact holding portion 531b is arranged on the upper surface of the corresponding holding block 513 of the holding member 51. The contact holding part 531b has a through hole for holding the second fixed contact member 532. The external connection portion 531c is a portion connected to an external electrical device (an electrical device to be controlled). The external connection portion 531c is, for example, in the shape of an elongated rectangular flat plate when viewed from the side, and protrudes downward from the lower end of the base portion 531a. The external connection portion 531c protrudes downward from the lower surface of the holding member 51. The holding piece 531d is a portion that is inserted into a holding recess 51k provided on the bottom surface of the corresponding terminal accommodating recess 51j, and protrudes from the front end of the base 531a to the right side (toward the holding member 51 side).

The second fixed contact member 532 is a member that constitutes the second fixed contact F2. The second fixed contact member 532 has, for example, a substantially truncated conical shape. The second fixed contact member 532 is fixed (held) in the through hole of the contact holding part 531b so as to protrude upward from the upper surface of the contact holding part 531b. The upper surface of the second fixed contact member 532 functions as the second fixed contact F2. The second fixed contact F2 is arranged below the first fixed contact F1. Movable contacts M1 and M2 of the corresponding movable unit 4 are arranged between the first fixed contact F1 and the second fixed contact F2. As a result, as the movable contacts M1 and M2 move up and down, the movable contact M1 contacts and separates from the first fixed contact F1, and the movable contact M2 contacts and separates from the second fixed contact F2.

(6) Operation of electromagnetic relay 1 The operation of electromagnetic relay 1 will be explained. The electromagnetic relay 1 includes a plurality of relay devices as described above, but since the operations of the plurality of relay devices are the same, in the following description, the operation of one relay device will be explained as a representative.

When no voltage is applied between the two coil terminals 12A and 12B, the coil 8 is not energized and is in a non-excited state. In this case, the movable piece 614 of the movable spring 61 is displaced upward by the spring force of the movable spring 61, thereby displacing the movable contacts M1 and M2 upward. As a result, the first movable contact M1 comes into contact with the first fixed contact F1, and the second movable contact M2 separates from the second fixed contact F2. Thereby, in the relay device, the electric path between the external connection part 612 of the movable spring 61 and the external connection part 521c of the first fixed terminal 52 is electrically connected, and the external connection part 612 of the movable spring 61 and the second fixed terminal 53 are electrically connected. The electric path between the external connection portion 531c and the external connection portion 531c is cut off.

When a voltage is applied between the two coil terminals 12A and 12B, the coil 8 is energized and is in an excited state. In this case, the armature 63 of the movable block 6 is attracted to the magnetic pole part 102 of the electromagnetic block 7 by the magnetic force generated in the coil 8 . This suction causes the movable piece 614 of the movable spring 61 to displace downward, thereby displacing the movable contacts M1 and M2 downward. As a result, the first movable contact M1 is separated from the first fixed contact F1, and the second movable contact M2 is brought into contact with the second fixed contact F2. As a result, in the relay device, the electric path between the external connection portion 612 of the movable spring 61 and the external connection portion 521c of the first fixed terminal 52 is interrupted, and the electric path between the external connection portion 612 of the movable spring 61 and the external connection portion 521c of the second fixed terminal 53 is interrupted. The electric path between the external connection portion 531c and the external connection portion 531c is electrically connected.

In this way, according to the switching between energization and de-excitation of the coil 8, the first movable contact M1 contacts or separates from the first fixed contact F1, and the second movable contact M2 contacts or separates from the second fixed contact F2. Separate.

(7) Functional explanation and comparative example of recess 93i of electromagnet block 7 (7-1) Functional explanation of recess 93i In the electromagnetic relay 1, as described above, the recess 93i is located in the lower flange 93 of the bobbin 9. It is provided on the left end surface 93L so as to be adjacent to the lower side of the conductor winding portion 122 of the coil terminals 12A, 12B (see FIG. 7).

Further, in the electromagnetic relay 1, a sealing agent 13 (see FIG. 14) is applied (filled) to the lower surface 2a (see FIG. 13) of the relay main body 2. The sealant 13 is, for example, a thermosetting or moisture-curing sealant. When applying the sealant 13 to the lower surface 2a of the relay body 2, turn the electromagnetic relay 1 upside down so that the lower surface 2a of the relay body 2 faces upward, and apply the sealant 13 to the lower surface 2a of the relay body 2. Apply to 2a.

When the sealant 13 is applied to the lower surface 2a of the relay main body 2 in this way, as shown in FIG. 13b enters into the relay body 2 through gaps between the respective parts of the relay body 2. Then, the portions 13a and 13b of the sealing agent 13 that have entered further enter the vicinity of the base of the conductor winding portion 122 protruding from the left end surface 93L of the lower flange portion 93 of the bobbin 9, and reach the left end of the lower flange portion 93. It accumulates in a recess 93i provided in the surface 93L. In other words, the portions 13a and 13b of the sealant 13 that have entered the vicinity of the base of the wire winding portion 122 accumulate in the recess 93i, thereby preventing the portions 13a and 13b from accumulating at the base of the wire winding portion 122.

More specifically, as shown by path Q1 in FIG. 51 and the fitting recess 51c. Then, the part 13a of the sealing agent 13 that has entered further passes along the left end surface 93L of the lower flange portion 93 and enters near the base of the conductive wire winding portion 122. The part 13a of the sealing agent 13 that has entered is collected in the recess 93i, thereby suppressing the part 13a from collecting at the base of the wire winding portion 122.

Further, as shown by path Q2 in FIGS. 14 and 15, a portion 13b of the sealant 13 applied to the lower surface 2a of the relay main body 2 is transferred from the lower surface 93p of the lower collar portion 93 of the bobbin 9 to the holding grooves 93f, 93g. go inside. Then, the part 13b of the sealant 13 that has entered further travels inside the holding grooves 93f and 93g, and enters near the base of the conductor winding portion 122 of the coil terminals 12A and 12B held in the holding grooves 93f and 93g. do. Then, the part 13b of the sealant 13 that has entered is collected in the recess 93i adjacent to the coil terminals 12A, 12B (see FIG. 14), thereby suppressing the part 13b from collecting at the root of the conductor winding portion 122. .

In this way, the portions 13a and 13b of the sealant 13 applied to the lower surface 2a of the relay main body 2 can be prevented from accumulating at the base of the conductor winding portion 122 by the recess 93i. This can prevent portions 13a and 13b of the sealant 13 from covering and solidifying the conducting wire 8a wound around the base of the conducting wire winding portion 122. As a result, without increasing the size of the electromagnetic relay 1, it is possible to prevent the conductive wire 8a wound around the base of the conductive wire winding portion 122 from being cut on the surface of the solidified sealant 13 due to vibration or impact.

(7-2) Comparative example 1
As shown in FIG. 16, the electromagnetic relay of Comparative Example 1 (hereinafter referred to as Comparative Example 1) has a recess in the left end surface 93L of the lower flange 93 of the bobbin 9, compared to the electromagnetic relay 1 of the above embodiment. The configuration is the same except that the location 93i is not provided.

As shown in FIG. 16, in Comparative Example 1, a recess 93i is provided in the left end surface 93L of the lower flange portion 93 of the bobbin 9 adjacent to the lower side of the conductor winding portion 122 of the coil terminals 12A, 12B. Not yet. Therefore, as shown by paths Q1 and Q2 in FIG. enter in. Then, the portions 13a and 13b of the sealant 13 that have entered further enter the base of the wire winding portion 122 that protrudes from the left end surface 93L of the lower flange portion 93 of the bobbin 9. Then, the portions 13a and 13b of the sealant 13 that have entered cover the conductive wire 8a wound around the base of the conductive wire winding portion 122 and solidify. Therefore, the conductive wire 8a wound around the base of the conductive wire winding portion 122 may be cut off by vibration or impact on the surface of the solidified sealant 13a, 13b.

That is, in Comparative Example 1, as in the above embodiment, the conductive wire 8a wound around the base of the conductive wire winding portion 122 is exposed to the surface of the sealants 13a and 13b that have accumulated and solidified at the base of the conductive wire winding portion 122. Wire breakage due to vibration or impact cannot be suppressed.

(7-3) Comparative example 2
As shown in FIG. 17, the electromagnetic relay of Comparative Example 2 (hereinafter referred to as Comparative Example 2) has a fitting protrusion on the lower flange 93 of the bobbin 9 in the first axis A1 in the Comparative Example 1. The structure is the same except that the distance D7 between the lower surface 93r of 93d and the conductive wire winding portion 122 is further increased.

As shown in FIG. 17, in Comparative Example 2, compared to Comparative Example 1, the distance D7 between the lower surface 93r of the fitting protrusion 93d of the lower collar portion 93 of the bobbin 9 and the conductive wire winding portion 122 is much larger. Therefore, as shown by path Q1 in FIG. 17, even if some of the sealant 13 applied to the lower surface 2a of the relay body 2 enters into the relay body 2 through the gaps between the various parts of the relay body 2, It is not possible to enter the vicinity of the base of the conductive wire winding portion 122 on the left end surface 93L of the lower flange portion 93 of the bobbin 9. Therefore, a portion of the sealant 13 applied to the lower surface 2a of the relay main body 2 can be prevented from accumulating at the base of the conductive wire winding portion 122. However, in Comparative Example 2, the electromagnetic relay 1 becomes larger because the interval D7 is increased as described above.

That is, in Comparative Example 2, unlike the above embodiment, the conductor 8a wound around the base of the conductor winding part 122 accumulates at the base of the conductor winding part 122 and solidifies without increasing the size of the electromagnetic relay. It is not possible to prevent wire breakage due to vibration or impact on the surface of the sealed sealant 13.

(8) Functional explanation and comparative example of the protrusion 51p provided on the bottom surface 51m of the holding groove 51i of the holding member 51 (8-1) Functional explanation of the protrusion 51p The holding member 51 of the electromagnetic relay 1 is made using a mold. It is formed by injection molding. In the electromagnetic relay 1, as described above, the protrusion 51p is provided on the bottom surface 51m of the holding groove 51i provided in the holding member 51 (see FIG. 12). Note that the surface of the protruding portion 51p constitutes a part of the bottom surface 51m of the holding groove 51i. In the electromagnetic relay 1, the protrusion 51p allows the thickness D5 of the bottom wall of the holding groove 51i to be partially increased without increasing the thickness D4 of the holding member 51 (that is, the strength of the bottom wall of the holding groove 51i is increased). ). Note that the thickness D4 of the holding member 51 is the thickness between the right main surface 51b and the left main surface 51a of the holding member 51. The thickness D5 of the bottom wall of the holding groove 51i is the thickness between the bottom surface 51m of the holding groove 51i (including the right end surface of the protrusion 51p) and the right main surface 51b of the holding member 51.

In this manner, by providing the protrusion 51p on the bottom surface 51m of the holding groove 51i, the strength of the bottom wall of the holding groove 51i can be ensured without increasing the thickness D4 of the holding member 51.

As a result, even if the concave portion 51h for preventing material residue is provided in the right main surface 51b of the holding member 51 in a portion overlapping with the retaining groove 51i, the protruding portion 51p overlaps with the concave portion 51h in the bottom surface 51m of the retaining groove 51i. Moreover, by being provided so as to cover the holding member 51, the thickness D6 of the bottom wall of the recess 51h can be ensured without increasing the thickness D4 of the holding member 51 (see FIG. 12). By ensuring the thickness D6 in this way, the strength of the bottom wall of the recess 51h can be ensured, and the fluidity of the molten resin at the bottom wall of the recess 51h can be ensured during injection molding of the holding member 51. . The above-mentioned "concavity 51h for preventing material remaining" is a countermeasure for an unnecessary portion formed on the right main surface 51b of the holding member 51 by molding material remaining in the gate of the mold used during injection molding of the holding member 51. It is a recess.

(8-2) Comparative example 3
As shown in FIG. 18, the electromagnetic relay of Comparative Example 3 (hereinafter referred to as Comparative Example 3) is different from the electromagnetic relay 1 of the above embodiment in that a protrusion 51p is provided on the bottom surface 51m of the holding groove 51i. They have the same configuration except that they are not.

As shown in FIG. 18, in Comparative Example 3, in order to ensure the thickness D6 of the bottom wall of the recess 51h provided on the right main surface 51b of the holding member 51, the thickness D5 of the bottom wall of the holding groove 51i is When increasing, the thickness D4 of the holding member 51 also increases. That is, in Comparative Example 3, the thickness D6 of the bottom wall of the recess 51h cannot be ensured without increasing the thickness D4 of the holding member 51 as in the above embodiment. That is, the strength of the bottom wall of the recess 51h cannot be ensured, and the fluidity of the molten resin at the bottom wall of the recess 51h during injection molding of the holding member 51 cannot be ensured.

(9) Modifications Modifications of the above embodiment will be described. The above embodiment and the modified examples described below can be applied in combination as appropriate.

(9-1) Modification example 1
In the above embodiment, the inner surface 93m of the recess 93i provided in the left end surface 93L of the lower collar portion 93 of the bobbin 9 (the surface facing the connecting portion 121e of the coil terminal 12A) is inclined with respect to the connecting portion 121e. (See Figure 9). However, the inner surface 93m of the recess 93i may be a plane parallel to the connecting portion 121e (see FIG. 19A).

Note that "parallel" in "the inner surface 93m of the recess 93i is a plane parallel to the connecting portion 121e" is not limited to parallel in a strict sense, and the inner surface 93m is a plane parallel to the connecting portion 121e. An inclination that can be considered to be substantially parallel (for example, an inclination of about 1 degree) is allowed.

According to this first modification, the recess 93i can be provided while ensuring the size of the internal space of the recess 93i.

(9-2) Modification example 2
In the above embodiment, the inner surface 93m of the recess 93i (the surface facing the connecting portion 121e of the coil terminal 12A) is inclined with respect to the connecting portion 121e (see FIG. 9); The side surface 93m may be stepped (see FIG. 19B). Thereby, the thickness D8 of the wall portion constituting the inner surface 93m of the bobbin 9 can be gradually made thinner in a stepwise manner, and the internal space of the recess 93i can be gradually enlarged in a stepwise manner. As a result, the recess 93i can be provided while achieving both the strength of the bobbin 9 and the width of the internal space of the recess 93i.

In the second modification, the distance D1 between the inner surface 93m and the connecting portion 121e may increase from the back side of the recess 93i toward the left end surface 93L side where the recess 93i is provided. Thereby, the sealant 13 (see FIG. 14) that has entered the left end surface 93L of the lower flange portion 93 of the bobbin 9 can be easily introduced into the recess 93i.

(9-3) Other Modifications In the above embodiment, in the bobbin 9, the first surface (left end surface 93L) from which the conductor winding portions 122 of the coil terminals 12A, 12B protrude, and the outside of the coil terminals 12A, 12B. A case where the second surface (lower surface 93p) from which the connecting portion 123 protrudes intersects (orthogonally) is illustrated. However, the first surface and the second surface are not limited to intersecting each other, and may be parallel to each other, for example. For example, the first surface may be the upper surface of the lower flange portion 93 of the bobbin 9, and the second surface may be the lower surface 93p of the bobbin as described above. In this case, the external connection portion protrudes downward from the lower surface of the bobbin, and the conductive wire winding portion 122 protrudes upward from the upper surface of the lower flange portion 93, as in the above embodiment. In this case, the recess 93i is provided on the upper surface of the lower collar portion 93.

(10) Aspects As is clear from the embodiments and modifications described above, the following aspects are disclosed in this specification.

The electromagnetic relay (1) of the first aspect includes a fixed terminal (52), a movable contact (M1), and a holding member (51). The fixed terminal (52) has a fixed contact (F1). The movable contact (M1) comes into contact with or separates from the fixed contact (F1). The holding member (51) holds the fixed terminal (52). The holding member (51) has a first main surface (51a) and a second main surface (51b) facing each other. The holding member (51) has a holding groove (51i) in the first main surface (51a) in which the fixed terminal (52) is arranged. The retaining groove (51i) has a protrusion (51p) that protrudes from the bottom surface (51m) of the retaining groove (51i). The fixed terminal (52) has a recess (521f) in which the protrusion (51p) is arranged at the end facing the bottom (51m) of the holding groove (51i).

According to this configuration, by providing the protrusion (51p) on the bottom surface (51m) of the holding groove (51i), the holding groove (51i) can be formed without increasing the thickness (D4) of the holding member (51). The strength of the bottom wall can be ensured.

In the electromagnetic relay (1) of the second aspect, in the first aspect, the fixed terminal (52) has a first protrusion (521d) and a second protrusion (521e). The first protrusion (521d) and the second protrusion (521e) protrude toward the bottom surface (51m) of the holding groove (51i) at the end of the fixed terminal (52), and located along the edge. The recess (521f) of the fixed terminal (52) is arranged between the first protrusion (521d) and the second protrusion (521e).

According to this configuration, the first protrusion (521d) and the second protrusion (521e) are press-fitted into the holding groove (51i), so that the fixed terminal (52) can be firmly fixed to the holding groove (51i). . The recess (521f) is arranged between the first protrusion (521d) and the second protrusion (521e) to reduce the space between the first protrusion (521d) and the second protrusion (521e). It can be used and provided.

In the electromagnetic relay (1) of the third aspect, in the first or second aspect, the protrusion (51p) of the holding groove (51i) fits into the recess (521f) of the fixed terminal (52). .

According to this configuration, the holding strength of the fixed terminal (52) by the holding member (51) can be increased. Furthermore, in a side view (plan view from the direction in which the protrusion (51p) protrudes), the protrusion (51p) can be formed to be as large as possible within the range of the recess (521f). As a result, when the concave portion (51h) for preventing material remaining is provided in the portion of the second main surface (51b) of the holding member (51) overlapping with the holding groove (51i), the protruding portion ( 51p), the recessed portion (51h) for preventing material remaining can be easily accommodated within the range of 51p). As a result, it becomes easier to ensure the strength of the bottom wall of the recess (51h) for preventing material residue.

In the electromagnetic relay (1) of the fourth aspect, in any one of the first to third aspects, the retaining groove (51i) has a pair of inner surfaces ( 51n). The protrusion (51p) of the holding groove (51i) is connected to the pair of inner surfaces (51n) in the width direction of the holding groove (51i).

According to this configuration, molten resin can easily flow into the protrusion (51p) during injection molding of the holding member (51). As a result, the moldability of the holding member (51) can be improved.

In the electromagnetic relay (1) of the fifth aspect, in any one of the first to fourth aspects, the fixed terminal (52) has a tapered portion (52a). The tapered portion (52a) is formed at the end of the fixed terminal (52) to protrude toward the bottom surface (51m) of the holding groove (51i) and along the end of the fixed terminal (52). The widthwise thickness of the holding groove (51i) in the tapered portion (52a) is smaller toward the side where the tapered portion (52a) protrudes. The recessed portion (521f) of the fixed terminal (52) is provided in the tapered portion (52a) of the fixed terminal (52).

According to this configuration, the recess (521f) of the fixed terminal (52) is provided in the tapered portion (52a) of the fixed terminal (52), thereby suppressing a decrease in the strength (for example, press-fit strength) of the fixed terminal (52). A recess (521f) can be provided in the fixed terminal (52).

The electromagnetic relay (1) of the sixth aspect, in any one of the first to fifth aspects, includes a plurality of sets including a fixed terminal (52), a movable contact (M1), and a holding member (51). .

According to this configuration, the electromagnetic relay (1) according to the present disclosure can be applied to an electromagnetic relay (1) including a plurality of sets of the fixed terminal (52), the movable contact (M1), and the holding member (51). be.

The electromagnetic relay (1) of the seventh aspect, in any one of the first to sixth aspects, further includes a second fixed terminal (53) and a second movable contact (M2). The second fixed terminal (53) has a second fixed contact (F2) different from the first fixed contact (F1) which is the fixed contact (F1), and the first fixed terminal (52) which is the fixed terminal (52). ), it is held by a holding member (51). The second movable contact (M2) operates together with the first movable contact (M1), which is the movable contact (M1), and comes into contact with and separates from the second fixed contact (F2).

According to this configuration, the electromagnetic relay (1) according to the present disclosure can be applied to a case where the electromagnetic relay (1) includes the second fixed contact (F2) and the second movable contact (M2).

The electromagnetic relay (1) of the eighth aspect, in any one of the first to seventh aspects, further includes a coil (8) that brings the movable contact (M1) into contact with or separates from the fixed contact (F1).

According to this configuration, it is applicable when the electromagnetic relay (1) according to the present disclosure is provided with a coil (8).

The electromagnetic relay (1) of the ninth aspect, in the eighth aspect, includes a plurality of sets including a fixed terminal (52), a movable contact (M1), a holding groove (51i), and a coil (8).

According to this configuration, the electromagnetic relay according to the present disclosure can be applied to a case where a plurality of sets including the fixed terminal (52), the movable contact (M1), the holding groove (51i), and the coil (8) are provided.

1 Electromagnetic relay 8 Coil 51 Holding member 51a Left main surface (first main surface)
51b Right main surface (second main surface)
51i Holding groove 51m Bottom surface 51n Inner surface 51p Projection portion 52 First fixed terminal (fixed terminal)
52a Tapered part 521d First protrusion 521e Second protrusion 521f Recessed part 53 Second fixed terminal F1 First fixed contact (fixed contact)
M1 1st movable contact (movable contact)

Claims (9)

a fixed terminal having a fixed contact;
a movable contact that comes into contact with or separates from the fixed contact;
A holding member that holds the fixed terminal,
The holding member has a first main surface and a second main surface facing each other,
The holding member has a holding groove in the first main surface in which the fixed terminal is arranged,
The retaining groove has a protrusion that protrudes from the bottom surface of the retaining groove,
The fixed terminal has a recess in which the protrusion is arranged at an end opposite to the bottom surface of the holding groove.
Electromagnetic relay. The fixed terminal includes, at the end of the fixed terminal, a first protrusion and a second protrusion that protrude toward the bottom surface of the holding groove and are arranged along the end of the fixed terminal. ,
The recess of the fixed terminal is arranged between the first protrusion and the second protrusion,
The electromagnetic relay according to claim 1. The protrusion of the holding groove fits into the recess of the fixed terminal.
The electromagnetic relay according to claim 1 or 2. The holding groove has a pair of inner surfaces facing each other in the width direction of the holding groove,
The protrusion of the holding groove is connected to the pair of inner surfaces in the width direction of the holding groove.
The electromagnetic relay according to any one of claims 1 to 3. The fixed terminal has, at the end of the fixed terminal, a tapered part that projects toward the bottom surface of the holding groove and is formed along the end of the fixed terminal;
The widthwise thickness of the holding groove in the tapered portion is smaller toward the side where the tapered portion protrudes;
The recessed portion of the fixed terminal is provided in the tapered portion of the fixed terminal,
The electromagnetic relay according to any one of claims 1 to 4. a plurality of sets including the fixed terminal, the movable contact, and the holding member;
The electromagnetic relay according to any one of claims 1 to 5. a second fixed terminal that has a second fixed contact different from the first fixed contact that is the fixed contact and is held by the holding member, unlike the first fixed terminal that is the fixed terminal;
Further comprising a second movable contact that operates together with the first movable contact that is the movable contact, and that contacts and separates from the second fixed contact.
The electromagnetic relay according to any one of claims 1 to 6. further comprising a coil that causes the movable contact to contact or separate from the fixed contact;
The electromagnetic relay according to any one of claims 1 to 7. a plurality of sets including the fixed terminal, the movable contact, the holding groove, and the coil;
The electromagnetic relay according to claim 8.

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