JP5725936B2 - Electromagnet device and electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnet device and an AC electromagnetic relay including the electromagnet device.

  An electromagnetic device that opens and closes the contact portion is incorporated in the electromagnetic relay. The electromagnet device includes an electromagnet and an armature that contacts the electromagnet by the magnetic attractive force of the electromagnet. The electromagnet includes a columnar iron core that extends in the longitudinal direction along its axis, a winding frame that receives the iron core, and a coil that is wound around the winding frame. In order to prevent the magnetic attractive force from becoming insufficient due to the pulsation, an annular short-circuit coil, ie, a bear-coiling coil, is fitted into the head of the iron core outside the winding frame.

  The head of the iron core is divided into a first head and a second head by a groove extending in a direction perpendicular to the longitudinal direction. The bear coil is attached to the second head by receiving the second head in a receiving hole formed in the bear coil. Thus, the bear coil extends in an annular shape along the outer peripheral surface of the second head including the inner peripheral surface of the groove. In order to optimize the effect of the shading coil, the cross-sectional area of the second head is more than the cross-sectional area of the first head by shifting the position of the groove toward the first head in the direction perpendicular to the longitudinal direction. It is set large.

JP 2009-164147 A

  The first head and the second head are arranged substantially symmetrically with respect to the axis of the iron core. Moreover, the difference in cross-sectional area is not so great. As a result, the outlines of the first and second heads are formed in substantially the same shape. Moreover, since the first head is formed smaller than the second head due to the difference in cross-sectional area, the receiving hole of the bear removing coil can receive the first head. Therefore, the bear removing coil may be erroneously fitted into the first head, resulting in the result that the electromagnetic relay does not operate.

  This invention is made | formed in view of the said situation, Comprising: It aims at providing the electromagnet apparatus and electromagnetic relay which can prevent the incorrect mounting | wearing of a bear removal coil.

In order to achieve the above object, according to the present invention,
A cylindrical reel around which the coil is wound;
An iron core body housed in the reel and extending in the longitudinal direction;
An iron core head which extends in the longitudinal direction from the iron core body and is arranged outside the reel; and
A first head that forms the iron core head and has a first cross-sectional area in a cross section perpendicular to the longitudinal direction;
A second head having a second cross-sectional area that is larger than the first cross-sectional area in a cross-section perpendicular to the longitudinal direction, forming the iron core head and extending parallel to the first head;
Forming the iron core head, a groove formed between the first head and the second head and extending linearly in a direction perpendicular to the longitudinal direction;
A receiving hole that receives the second head, and an annular decoiling coil that is mounted on the second head by receiving the second head in the receiving hole and fitting into the groove. ,
In a state in which the bear coil is mounted on the second head, an electromagnet device having a size larger than the receiving hole in the direction perpendicular to the longitudinal direction of the first head is provided.

  In such an electromagnet device, in the cross section orthogonal to the longitudinal direction, the first contour of the iron core head is formed larger than the second contour of the iron core barrel, and the iron core head is outside the outer peripheral surface of the iron core drum. A step is formed between the core body and the iron core body. In this case, the first contour may be similar to the second contour. Further, the iron core body portion may have a columnar shape or a prismatic shape. Such an electromagnet device is incorporated in an electromagnetic relay.

Moreover, according to the present invention,
A cylindrical reel around which the coil is wound;
An iron core body housed in the reel and extending in the longitudinal direction;
An iron core head which extends in the longitudinal direction from the iron core body and is arranged outside the reel; and
A first head that forms the iron core head and has a first cross-sectional area in a cross section perpendicular to the longitudinal direction;
A second head having a second cross-sectional area that is larger than the first cross-sectional area in a cross-section perpendicular to the longitudinal direction, forming the iron core head and extending parallel to the first head;
Forming the iron core head, a groove formed between the first head and the second head and extending while bending in a direction perpendicular to the longitudinal direction;
A receiving hole for receiving the second head, and an annular decoiling coil mounted on the second head by receiving the second head in the receiving hole and being fitted in the groove. An electromagnet device is provided.

  According to the above configuration, the first head is larger than the receiving hole of the bear coil in the direction orthogonal to the longitudinal direction of the iron core in a state where the bear coil is mounted on the second head of the iron core. Have dimensions. As a result, when the bear removing coil is to be mounted on the first head, the first head interferes with the bear removing coil outside the receiving hole. The receiving hole cannot receive the first head. As a result, in the electromagnet device, it is possible to prevent the bear removing coil from being erroneously attached to the first head.

  Moreover, according to the above configuration, when the bear removing coil is mounted on the second head of the iron core, the protrusion is disposed at the first position with respect to the bear removing coil. On the other hand, when the bear removing coil is to be mounted on the first head, the protrusion is disposed at a second position different from the first with respect to the bear removing coil. As a result, it is possible to confirm that the bear removing coil is erroneously attached to the iron core by changing the position of the protrusion with respect to the bear removing coil. Accordingly, it is possible to prevent the bear removing coil from being erroneously attached to the first head.

  Still further, according to the above configuration, when the dark spot coil is to be attached to the first head, the direction in which the groove is bent and the direction in which a part of the dark spot coil that is received in the groove is bent are: The reverse is set. As a result, when the kuma coil is mounted, the second head interferes with the kuma coil outside the receiving hole. The receiving hole cannot receive the first head. As a result, in the electromagnet device, it is possible to prevent the bear removing coil from being erroneously attached to the first head.

It is a perspective view showing roughly the structure of the electromagnetic relay concerning one embodiment of the present invention. It is a perspective view showing roughly the structure of the electromagnetic relay concerning one embodiment of the present invention. It is a disassembled perspective view of the electromagnetic relay which concerns on one Embodiment of this invention. It is a side view which shows roughly the structure of the electromagnetic relay which concerns on one Embodiment of this invention. It is a perspective view showing roughly the structure of the electromagnet device concerning the 1st example of the present invention. It is a disassembled perspective view which shows roughly the structure of the electromagnet apparatus which concerns on the 1st specific example of this invention. It is sectional drawing which shows schematically the electromagnet apparatus which concerns on the 1st example of this invention. It is a front view which shows roughly the structure of the iron core of the electromagnet apparatus which concerns on the 1st specific example of this invention, and a bear coil. It is a front view which shows a mode that the bear removal coil is mounted | worn with a 1st head. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 2nd example of this invention, and a bear coil. It is a front view which shows a mode that the bear removal coil is mounted | worn with a 1st head. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 3rd example of this invention, and a bear coil. It is a front view which shows a mode that the bear removal coil is mounted | worn with a 1st head. It is a perspective view which shows roughly the iron core of the electromagnet apparatus which concerns on the 4th example of this invention. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 4th example of this invention. It is a perspective view which shows roughly the iron core of the electromagnet apparatus which concerns on the 5th example of this invention. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 5th example of this invention. It is a perspective view showing roughly the iron core of the electromagnet device concerning the 6th example of the present invention. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 6th specific example of this invention. It is a perspective view showing roughly an electromagnet device concerning the 7th example of the present invention. It is a front view which shows roughly a mode that the bear removal coil was normally mounted | worn with the 2nd head of the iron core. It is a front view which shows roughly a mode that the bear removal coil was mounted | worn by mistake in the 1st head of the iron core. It is a front view which shows roughly a mode that the bear removal coil was normally mounted | worn with the 2nd head of the iron core. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 8th example of this invention. It is a front view which shows roughly the iron core of the electromagnet apparatus which concerns on the 8th example of this invention, and a bear coil.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following embodiments, components having an equivalent configuration are denoted by the same reference numerals in the respective drawings. FIG. 1 is a perspective view schematically showing the structure of an electromagnetic relay 10 according to an embodiment of the present invention. The electromagnetic relay 10 includes a case 11 having a rectangular parallelepiped outline, for example. The case 11 is formed by integral molding from a resin material having electrical insulation, for example. An opening 12 is formed on the bottom surface of the case 11. The components described below are received in the case 11 through the opening 12. Within the opening 12, a plurality of terminals protrude outward.

  FIG. 2 is a perspective view schematically showing the structure of the electromagnetic relay 10 according to one embodiment of the present invention. FIG. 3 is an exploded perspective view of the electromagnetic relay 10 according to one embodiment of the present invention. FIG. 4 is a side view schematically showing the structure of the electromagnetic relay 10 according to one embodiment of the present invention. 2 and 4, the case 11 is not shown. As shown in FIGS. 2 to 4, the electromagnetic relay 10 includes a base, that is, a base block 13 that is disposed in the case 11 and fixed to the case 11. The base block 13 closes the opening 12 of the case 11 at the bottom surface. The base block 13 is formed by integral molding from a resin material having electrical insulation, for example.

  The electromagnetic relay 10 includes an electromagnet device 14 incorporated in the base block 13, a contact portion 15 that is electrically insulated from the electromagnet device 14 and incorporated in the base block 13, and a slide that is slidably supported on the base block 13. Member 16. The contact portion 15 is opened and closed by the action of the slide member 16 that slides between an open position where the contact portion 15 is opened and a closed position where the contact portion 15 is closed. The slide member 16 extends in the longitudinal direction of the case 11. The base block 13 includes a cylindrical body 17 having a bottomed hole that accommodates a part of the electromagnet device 14, and a support body 18 that is integrally formed with the cylindrical body 17 and establishes the contact portion 15. The cylindrical body 17 has a substantially rectangular parallelepiped outline.

  The contact portion 15 is disposed between the first and second fixed contact members 21 and 22 and the first and second fixed contact members 21 and 22 arranged in the longitudinal direction of the case 11 adjacent to the cylindrical body 17. And a movable contact member 23. A plurality of receiving grooves 24 for individually receiving these contact members 21, 22, and 23 are formed in the support 18. The cylindrical body 17 ensures electrical insulation between the electromagnet device 14 and the contact portion 15. The first and second fixed contact members 21 and 22 are formed of, for example, a conductive plate member punched into a predetermined shape from a copper plate. The movable contact member 23 is formed of, for example, a spring plate punched from a thin plate of phosphor bronze for spring. The movable contact member 23 can bend based on the support area supported by the support 18 based on the sliding movement of the slide member 16.

  The first and second fixed contact members 21 and 22 each have a break fixed contact 25 and a make fixed contact 26 that are spaced apart from each other and face each other. On the other hand, the movable contact member 23 has a movable contact 27 disposed between the break fixed contact 25 and the make fixed contact 26. The movable contact 27 contacts the make fixed contact 26 when the slide member 16 is positioned at the closed position, and contacts the break fixed contact 25 when the slide member 16 is positioned at the open position. Each of the first and second fixed contact members 21 and 22 and the movable contact member 25 has contact terminals 28 that protrude in parallel with each other from the bottom surface of the base block 13.

  As is clear from FIG. 3, the electromagnet device 14 includes an electromagnet 31 and an armature 32 driven by the electromagnet 31. The electromagnet 31 includes a winding frame 33 and a coil 34 that is wound around the winding frame 33 and supported by the winding frame 33. FIG. 5 is a perspective view of the electromagnet device 14 according to the first specific example of the present invention. FIG. 6 is an exploded perspective view of the electromagnet device 14 according to the first specific example of the present invention. FIG. 7 is a cross-sectional view of the electromagnet device 14 according to the first specific example of the present invention. Referring to FIGS. 5 to 7, the winding frame 33 includes a hollow cylindrical body portion 35, and a first portion that is formed at both ends in the longitudinal direction of the body portion 35 and extends annularly outward from the outer peripheral surface of the body portion 35. And second collar portions 36 and 37. The coil 34 is tightly wound around the body portion 35 with a predetermined length between the first and second flange portions 36 and 37. The winding frame 33 is formed from an electrically insulating resin molded product.

  As is apparent from FIG. 7, the electromagnet 31 includes an iron core 38 that is accommodated in the body portion 35 of the winding frame 33 and extends in the longitudinal direction. One end of the iron core 38 defined in the longitudinal direction protrudes outward from the first flange 36, while the other end of the iron core 38 defined in the longitudinal direction protrudes outward from the second flange 37. The electromagnet 31 includes a short-circuited coil, that is, a bear-off coil 39, which is attached to one end of the iron core 38 and disposed outside the trunk portion 35, and a yoke 41 connected to the other end of the iron core 38 by caulking, for example. The yoke 41 is formed from an L-shaped flat plate, for example. The yoke 41 spreads along the second flange 37 and then bends, and spreads in parallel to the trunk 35 with a predetermined interval from the coil 34. The iron core 38 and the yoke 41 are made of magnetic steel. The bear coil 39 is made of copper.

  As apparent from FIG. 3, the end of the yoke 41 extending parallel to the body portion 35 is contacted around a swing axis extending in a direction orthogonal to the longitudinal direction of the iron core 38 and extending parallel to the bottom surface of the base block 13. The pole 32 is connected so as to be swingable. The armature 32 is formed from a flat plate formed from magnetic steel. The armature 32 is elastically coupled to the yoke 41 via a leaf spring 42 so as to be relatively movable. As is apparent from FIG. 4, the leaf spring 42 is disposed to face one end of the iron core 38 and the bear coil 39. The leaf spring 42 functions as an elastic hinge between the yoke 41 and the armature 32. As a result, the leaf spring 42 urges the armature 32 in a direction away from one end of the iron core 38 and the bear coil 39 by the spring action.

  When the electromagnet 31 is not in operation, the armature 32 receives the elastic force of the leaf spring 42 at its lower end and comes into contact with the end of the yoke 41. As a result, the armature 32 is held stationary at a separated position separated from one end of the iron core 38 and the bear coil 39 by a predetermined distance. On the other hand, when the electromagnet 31 is operated, the armature 32 is moved toward the one end of the iron core 38 around the swing axis defined by the contact position with the end of the yoke 41 by the magnetic attractive force of the iron core 38. It swings against the spring force of the spring 42. As a result, the armature 32 is attracted to the end face of one end of the iron core 38. Thus, a magnetic flux flow path is established by the iron core 38, the yoke 41 and the armature 32 around the coil 34. The armature 32 is held at the contact position.

  A projecting piece 43 is formed on the upper end of the armature 38 opposite to the lower end that contacts the yoke 41. The projecting piece 43 is received in a locking hole 44 formed at one end of the slide member 16 defined in the longitudinal direction. Thus, the armature 38 is connected to the slide member 16. The slide member 16 is formed from a substantially rectangular frame made of, for example, an electrically insulating resin material. The aforementioned movable contact member 23 is connected to the other end of the slide member 16 defined in the longitudinal direction. As apparent from FIG. 2, the pair of protrusions 45, 45 formed at the other end of the slide member 16 are engaged with the pair of engagement holes 46, 46 formed at the free end of the movable contact member 23. Match. The reciprocating movement of the slide member 16 on the base block 13 in the direction parallel to the bottom surface of the base block 13 is realized by the aforementioned swinging of the armature 32.

  Here, the operation of the electromagnetic relay 10 will be described. When the electromagnet 31 is not in operation, the armature 32 is disposed at the separation position shown in FIG. In this separated position, as described above, the armature 32 is separated from the one end of the iron core 38 by a predetermined distance by the spring force of the leaf spring 42. At this time, the slide member 16 is placed at one limit position of the reciprocating movement range. As a result, the movable contact 27 of the movable contact member 23 is brought into conductive contact with the break fixed contact 25 of the first fixed contact member 21, and the break contact is closed. On the other hand, the movable contact 27 is arranged away from the make fixed contact 26 of the second fixed contact member 21.

  On the other hand, when the electromagnet 31 is actuated, the armature 32 swings toward one end of the iron core 38 against the spring force of the leaf spring 42 by the magnetic attractive force acting on the armature 32 from the iron core 38. By this swinging, the slide member 16 moves toward the other limit position of the reciprocating movement range. As the slide member 16 moves, the movable contact member 25 is elastically bent. When the armature 32 is attracted to the iron core 38, the slide member 16 reaches the other limit position. As a result, the movable contact 27 is separated from the break fixed contact 25 and is brought into conductive contact with the make fixed contact 26 to close the make contact. In this way, an opening / closing operation is realized by the contact portion 15.

  The reel 33 has a support portion 47 formed integrally with the first flange 36 on the side opposite to the support 18. The support portion 47 includes a pedestal 48 that receives the fringe coil 38 adjacent to the first flange portion 36, and a pair of protrusions 49 and 49 that protrude from the pedestal 48 in the longitudinal direction of the body portion 35. As is apparent from FIG. 3, the end of the yoke 41 is disposed below the pedestal 48. In the longitudinal direction of the electromagnetic relay 10, one end of the iron core 38 and the end of the yoke 41 are arranged at the same position. Coil terminals 51 and 51 are supported on the protrusions 49 and 49, respectively. The aforementioned coil 34 is connected to the coil terminals 51, 51. The coil terminals 51 and 51 protrude outward from the bottom surface of the base block 13.

  FIG. 8 is a front view of the iron core 38 and the bear removing coil 39 schematically showing the structure of the electromagnet device 14 according to the first specific example of the present invention. Referring to FIG. 8 in addition to the above-described FIG. 5 to FIG. 7, the iron core 38 includes an iron core body 52 housed in the body 35 along the longitudinal direction of the iron core 38, and an iron core body 52. An iron core head 53 that extends from one end of the iron core 38 in the longitudinal direction of the iron core 38 and is disposed outside the body portion 35. The iron core head 53 is formed integrally with the iron core body 52. The above-described bear removing coil 39 is attached to the iron core head 53. The aforementioned yoke 41 is connected to the other end of the core body 52. In this specific example, the iron core 38 has the same contour from the iron core body 52 to the iron core head 53.

  As is apparent from FIG. 6, the iron core 38 is formed in a quadrangular prism shape. The cross section of the iron core 38 orthogonal to the longitudinal direction of the iron core 38 has a trapezoidal shape. The iron core head 53 includes a first head 54 and a second head 55 that extend from the iron core body 52 in parallel to each other in the longitudinal direction of the iron core 38. The tip surfaces of the first and second heads 54 and 55 constitute a magnetic pole surface. The inward surfaces of the first and second heads 54 and 55 spread in parallel to each other. A groove 56 is formed between the first and second heads 54 and 55. The groove 56 extends in a direction orthogonal to the longitudinal direction of the iron core 38. At the same time, the groove 56 extends linearly in a direction parallel to the bottom surface of the base block 13. The width of the groove 56 defined in the direction orthogonal to the extending direction of the groove 56 is set to be constant in the extending direction of the groove 56. The first and second heads 54 and 55 face each other across the groove 56. On the other hand, the body portion 35 of the winding frame 33 is formed in a prismatic shape corresponding to the shape of the iron core 38.

  The bear coil 39 is formed, for example, from a substantially rectangular parallelepiped flat plate. The bear coil 39 is formed with a receiving hole 57 penetrating from one side surface to the other side surface. The receiving hole 57 defines a space similar to the outline of the second head 55. In this way, when the receiving hole 57 receives the second head 55, the bear coil 39 is attached to the second head 55. The bear removing coil 39 is fitted in the groove 56. On the other hand, a recess 58 for receiving the first head 54 is formed at the upper end of the pedestal 48 of the winding frame 33. When the iron core 38 is accommodated in the trunk portion 53, the first head 54 is fitted in the recess 58. At this time, the bear removing coil 39 stands upright on the base 48. The bear coil 39 may be received on the outward surface of the first flange 36 on the other side surface, or a slight gap may be formed between the other side surface and the outward surface of the first flange portion 36. Good.

  As shown in FIG. 8, in the iron core head 53, in the cross section orthogonal to the longitudinal direction of the iron core 38, the second cross sectional area S <b> 2 of the second head 55 is larger than the first cross sectional area S <b> 1 of the first head 54. Is set larger. Due to such a difference in cross-sectional area, the bear coil 39 can function normally. On the other hand, in a state in which the bear coil 39 is attached to the iron core head 53, the first head is defined in a first direction D1 that is orthogonal to the longitudinal direction of the iron core 38 and parallel to the extending direction of the groove 56. The dimension d1 of 54 is set larger than the dimension d2 of the second head 55, that is, the receiving hole 57, which is similarly defined. Here, the dimensions d1 and d2 mean “maximum values” of dimensions defined in a direction perpendicular to the longitudinal direction of the iron core 38 and parallel to the extending direction of the groove 56.

  In the electromagnetic relay 10 as described above, the dimension d1 of the first head 54 defined in the first direction D1 is set larger than the dimension d2 of the receiving hole 57 similarly defined in the first direction D1. As a result, even if the dark spot coil 39 is to be attached to the first head portion 54, the first head portion 54 interferes with the side surface of the dark spot coil 39 outside the receiving hole 57 as shown in FIG. 9. The receiving hole 57 cannot receive the first head 54. As a result, in the electromagnet device 14, it is possible to prevent the bear removing coil 39 from being erroneously attached to the first head 54. Moreover, since the body portion 35 of the winding frame 33 has a quadrangular prism shape like the iron core 38, the rotation of the iron core 38 is restricted around the rotation axis extending in the longitudinal direction of the body portion 35 within the body portion 35. The iron core 38 can be accommodated in the reel 33 in a normal orientation at all times.

  FIG. 10 is a front view schematically showing the iron core 38 and the bear coil 39 of the electromagnet device 14 according to the second specific example of the present invention. In the electromagnet device 14, the iron core 38 is formed in a triangular prism shape. The body portion 35 of the winding frame 33 is formed in a triangular prism shape corresponding to the iron core 38. Similarly to the above, the dimension d1 of the first head 54 defined in the first direction D1 is set larger than the dimension d2 of the receiving hole 57 similarly defined in the first direction D1. According to such a configuration, even if the bear coil 39 is attached to the first head 54, the first head 54 is placed on the side surface of the bear coil 39 outside the receiving hole 57 as shown in FIG. 11. have a finger in the pie. As a result, it is possible to prevent the bear removing coil 39 from being erroneously attached to the first head 54. Moreover, since the body portion 35 of the winding frame 33 has a triangular prism shape like the iron core 38, the rotation of the iron core 38 is restricted around the rotation axis extending in the longitudinal direction of the body portion 35 within the body portion 35.

  FIG. 12 is a front view schematically showing the iron core 38 and the bear coil 39 of the electromagnet device 14 according to the third specific example of the present invention. In this electromagnet device 14, the iron core 38 has a quadrangular prism shape as in the first specific example, but the cross section perpendicular to the longitudinal direction of the iron core 38 has an inverted trapezoidal shape. In the electromagnet device 14, the dimension d1 of the first head 54 defined in the second direction D2 orthogonal to the longitudinal direction of the iron core 38 and orthogonal to the extending direction of the groove 56 is the second head similarly defined. It is set larger than the dimension d2 of the portion 55, that is, the receiving hole 57. Here, the dimensions d1 and d2 mean “maximum values” of dimensions defined in a direction orthogonal to the longitudinal direction of the body portion 35 and orthogonal to the extending direction of the groove 56.

  According to such a configuration, even if the bear coil 39 is to be attached to the first head 54, the first head 54 is placed on the side surface of the bear coil 39 outside the receiving hole 57 as shown in FIG. 13. have a finger in the pie. The receiving hole 57 cannot receive the first head 54. As a result, in the electromagnet device 14, it is possible to prevent the bear removing coil 39 from being erroneously attached to the first head 54. In addition, since the body portion 35 of the winding frame 33 has a quadrangular prism shape like the iron core 38, the rotation of the iron core 38 is restricted around the rotation axis extending in the longitudinal direction of the iron core 38 within the body portion 35. The iron core 38 can be accommodated in the reel 33 in a normal orientation at all times.

  FIG. 14 is a perspective view schematically showing an iron core 38 of an electromagnet device 14 according to a fourth specific example of the present invention. FIG. 15 is a front view schematically showing an iron core 38 of an electromagnet device 14 according to a fourth specific example of the present invention. In the electromagnet device 14, the contour line P <b> 1 that specifies the first contour of the iron core head 53 is larger than the contour line P <b> 2 that specifies the second contour of the core body 52 in the cross section orthogonal to the longitudinal direction of the iron core 38. It is formed. As is clear from FIG. 15, the contour line P2 is included in the contour line P1. Further, the first contour is formed in a similar shape to the second contour. As a result, the iron core head 53 forms a step 59 extending outward from the outer peripheral surface of the iron core body 52 between the iron core body 52 and the iron core body 52. The contour line P1 of the iron core head 53 is specified by a contour line that represents the entire outer contour of the first and second heads 54 and 55 including the groove 56.

  In this electromagnet device 14, the iron core head 53 and the iron core body 52 are formed in a quadrangular prism shape as in the first specific example. That is, the first contour of the iron core head 53 and the second contour of the iron core body 52 both have a trapezoidal shape. Therefore, in the electromagnet device 14, the first head 54 interferes with the side surface of the kuma coil 39 outside the receiving hole 57 as described above. The receiving hole 57 cannot receive the first head 54. It is possible to prevent the bear removing coil 39 from being erroneously attached to the first head 54. Moreover, since the body portion 35 of the winding frame 33 has a quadrangular prism shape like the iron core 38, the iron core 38 can be always accommodated in the winding frame 33 in a normal direction.

  Further, according to such a configuration, the core head 53 can be formed larger than the core body 52 by the step 59. As a result, by forming the core body portion 52 relatively small with respect to the iron core head 53, that is, by forming the body portion 35 of the winding frame 33 relatively small with respect to the iron core head 53, More coils 34 can be wound around the body 35 than ever before. As a result, the electromagnet device 14 can generate a large magnetic flux. At the same time, the area of the magnetic pole surface formed on the front end surface of the core head 53 can be increased by forming the core head 53 relatively larger than the core body 52. The electromagnet device 14 can generate a magnetic attraction force stably.

  Further, since the first contour of the iron core head 53 is similar to the second contour of the iron core body 52, the second contour is within the first outline at the boundary surface between the iron core body 52 and the iron core head 53. Efficiently arranged. The core body 52 is efficiently connected to the core head 53. As a result, the magnetic flux efficiently flows between the iron core body 52 and the iron core head 53. On the other hand, when the first contour and the second contour have different external shapes, the second contour is not efficiently arranged in the first contour. In other words, the second contour cannot spread over a large area within the first contour. Magnetic flux cannot efficiently flow between the core body 52 and the core head 53.

  FIG. 16 is a perspective view schematically showing an iron core 38 of an electromagnet device 14 according to a fifth specific example of the present invention. FIG. 17 is a front view schematically showing an iron core 38 of an electromagnet device 14 according to a fifth specific example of the present invention. In the electromagnet device 14, the iron core head 53 is formed in the same manner as in the third specific example described above. That is, the iron core head 53 is formed from a quadrangular prism shape. On the other hand, the iron core body 52 is formed in a cylindrical shape. Such an electromagnet device 14 achieves the same effects as described above. In addition, if the body portion 35 of the winding frame 33 is formed in a cylindrical shape corresponding to the iron core body portion 52, the coil 34 can be efficiently wound around the body portion 35.

  FIG. 18 is a perspective view schematically showing an iron core 38 of an electromagnet device 14 according to a sixth specific example of the present invention. FIG. 19 is a front view schematically showing an iron core 38 of an electromagnet device 14 according to a sixth specific example of the present invention. In the electromagnet device 14, the iron core head 53 is formed in the same manner as in the third specific example described above. That is, the iron core head 53 is formed from a quadrangular prism shape. On the other hand, the core body 52 is formed in a quadrangular prism shape. Here, the cross section of the core body 52 defined in the longitudinal direction of the body 35 is formed in a square shape. Such an electromagnet device 14 achieves the same effects as described above. In addition, the shape of the iron core 38 can be flexibly changed corresponding to the outer shape of the electromagnetic relay 10.

  FIG. 20 is a perspective view schematically showing an electromagnet device 14 according to a seventh example of the present invention. In the electromagnet device 14, a protrusion 61 that protrudes in the longitudinal direction of the body portion 35 from the outward surface of the first flange portion 36 of the winding frame 33 is formed along the outline of the bear coil 39. The protrusion 61 extends linearly in a direction orthogonal to the longitudinal direction of the body portion 35. The protrusion 61 is disposed outside the outline of the bear coil 39. On the other hand, the iron core 38 is formed in a cylindrical shape as in the prior art. In the iron core 38, the iron core body 52 and the iron core head 53 have the same diameter. The body portion 35 of the winding frame 33 is formed in a cylindrical shape corresponding to the iron core 38. The recess 58 formed in the pedestal 48 of the winding frame 33 is formed in a semi-cylindrical shape corresponding to the shape of the iron core 38.

  FIG. 21 is a front view schematically showing the iron core 38 and the bear coil 39 of the electromagnet device 14 according to the seventh specific example of the present invention. As described above, in the iron core head 53, the second cross-sectional area of the second head 55 is set to be larger than the first cross-sectional area of the first head 54 in the cross section orthogonal to the longitudinal direction of the body 35. Is done. When the first head 54 is received in the recess 58 of the pedestal 48, the protrusion 61 is disposed at the first position with respect to the bear coil 39. In the first position, the protrusion 61 is disposed outside the outline of the bear coil 39. As a result, as described above, the protrusion 61 can be visually recognized on the outward face of the first flange 36 outside the outline of the bear coil 39. In this example, the protrusion 61 extends in a straight line with a slight gap from the outline of the dark spot coil 39 parallel to the outline of the dark spot coil 39.

  The iron core 38 is formed in a cylindrical shape. As a result, as shown in FIG. 22, the receiving hole 57 of the dark spot coil 39 receives the first head 54. In this case, the second head 55 is received in the recess 59 in a state where the iron core 38 is mounted on the winding frame 33. Since the second cross-sectional area of the second head 55 is set larger than the first cross-sectional area of the first head 54, the bear coil is compared with the case where the first head 54 is received in the recess 59. 39 is lifted from the upper surface of the pedestal 48. As a result, the protrusion 61 is disposed at a second position different from the first position described above. In the second position, the protrusion 61 is disposed on the inner side of the outline of the bear coil 39. That is, the protrusion 61 is hidden behind the bear removing coil 39. Therefore, it is possible to confirm that the bear removing coil 39 is erroneously attached to the iron core 38 when the electromagnet device 14 is assembled. It is possible to prevent the bear removing coil 39 from being erroneously attached to the first head 54.

  As shown in FIG. 23, a plurality of protrusions 61 may be formed on the outward surface of the first flange portion 36. In this specific example, a pair of protrusions 61 and 61 are arranged in a direction orthogonal to the longitudinal direction of the body portion 35. The protrusions 61 are arranged at the same height from the upper surface of the pedestal 48. As described above, the protrusions 61 and 61 are arranged at the first position and the second position with respect to the dark spot coil 39 by the change in the position of the dark spot coil 39. As a result, it can be confirmed that the bear removing coil 39 is erroneously attached to the iron core 38. The shape of the protrusion 61 may be formed in other shapes as long as the protrusion 61 can be disposed at the first position and the second position with respect to the dark spot coil 39.

  FIG. 24 is a perspective view schematically showing the iron core 38 of the electromagnet device 14 according to the eighth specific example of the present invention. FIG. 25 is a front view schematically showing the iron core 38 and the bear coil 39 of the electromagnet device 14 according to the eighth example of the present invention. In this electromagnet device 14, both the core body 52 and the core head 53 are formed in a cylindrical shape. The diameter of the iron core head 53 is set larger than the diameter of the iron core body 52. The core body 52 and the core head 53 define a common central axis. In this example, the groove 56 extends while being bent in a direction orthogonal to the longitudinal direction of the body portion 35. The groove 56 is formed, for example, from a pair of linear grooves 62 and 62 that extend while inclining toward the central axis of the iron core head 53. On the other hand, the bear removing coil 39 defines a bent portion 63 that bends toward the receiving hole 57 at the lower end thereof.

  According to such a configuration, when the bear removing coil 39 is to be mounted on the first head 54, the direction in which the straight grooves 62, 62 of the groove 56 are bent and the direction in which the bent portion 63 is bent are set to be opposite. The As a result, the second head 55 interferes with the bent portion 63 of the bear removing coil 39 outside the receiving hole 57 when the bear removing coil 39 is mounted. The receiving hole 57 cannot receive the first head 54. As a result, in the electromagnet device 14, it is possible to prevent the bear removing coil 39 from being erroneously attached to the first head 54. In the electromagnet device 14, the iron core 38 may be formed in a quadrangular prism shape.

  In the above embodiment, the electromagnetic relay 10 of the type in which the armature 32 slides the slide member 16 to open and close the contact portion 15 has been described. However, in the present invention, for example, the armature swings via the slide member 16. Needless to say, it includes an electromagnetic relay of a type that opens and closes a contact portion, and various other types of electromagnetic relays.

DESCRIPTION OF SYMBOLS 10 Electromagnetic relay 14 Electromagnet apparatus 33 Winding frame 34 Coil 36 鍔 part 39 Bearding coil 52 Iron core part 53 Iron core head 54 First head 55 Second head 56 Groove 57 Receiving hole 59 Step 61

Claims (7)

A cylindrical reel around which the coil is wound;
An iron core body housed in the reel and extending in the longitudinal direction;
An iron core head which extends in the longitudinal direction from the iron core body and is arranged outside the reel; and
A first head that forms the iron core head and has a first cross-sectional area in a cross section perpendicular to the longitudinal direction;
A second head having a second cross-sectional area that is larger than the first cross-sectional area in a cross-section perpendicular to the longitudinal direction, forming the iron core head and extending parallel to the first head;
Forming the iron core head, a groove formed between the first head and the second head and extending linearly in a direction perpendicular to the longitudinal direction;
A receiving hole that receives the second head, and an annular decoiling coil that is mounted on the second head by receiving the second head in the receiving hole and fitting into the groove. ,
In the state where the bear coil is mounted on the second head, the first head has a size larger than the receiving hole in a direction orthogonal to the longitudinal direction.   In a cross section perpendicular to the longitudinal direction, the first contour of the iron core head is formed larger than the second contour of the iron core body, and the iron core head extends outward from the outer peripheral surface of the iron core body and the iron core. The electromagnet device according to claim 1, wherein a step is formed between the body portion and the body portion.   The electromagnet device according to claim 2, wherein the first contour is similar to the second contour.   The electromagnet apparatus according to any one of claims 1 to 3, wherein the iron core body portion has a columnar shape or a prismatic shape.   An electromagnetic relay comprising the electromagnet device according to claim 1. A cylindrical reel around which the coil is wound;
An iron core body housed in the reel and extending in the longitudinal direction;
An iron core head which extends in the longitudinal direction from the iron core body and is arranged outside the reel; and
A first head that forms the iron core head and has a first cross-sectional area in a cross section perpendicular to the longitudinal direction;
A second head having a second cross-sectional area that is larger than the first cross-sectional area in a cross-section perpendicular to the longitudinal direction, forming the iron core head and extending parallel to the first head;
Forming the iron core head, a groove formed between the first head and the second head and extending while bending in a direction perpendicular to the longitudinal direction;
A receiving hole for receiving the second head, and an annular decoiling coil mounted on the second head by receiving the second head in the receiving hole and being fitted in the groove. An electromagnet device. An electromagnetic relay comprising the electromagnet device according to claim 6.

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