Electromagnet device

Abstract

The electromagnet device includes a coil, a bobbin, a first coil terminal, a second coil terminal, and a third coil terminal. The bobbin includes a main body portion around which a coil is wound and a flange portion extending from the main body portion. The first coil terminal includes a first binding portion extending from the flange portion in an axial direction of the main body portion. The second coil terminal includes a second binding portion extending in the axial direction from the flange portion. The third coil terminal is disposed between the first coil terminal and the second coil terminal. The third coil terminal includes a third strapping portion. The third binding portion includes a base end portion and a tip end portion extending from the base end portion in a direction approaching the second binding portion. The base end portion of the third binding portion is disposed eccentrically with respect to the axis of the main body portion in a direction from the second coil terminal toward the first coil terminal.

Description

Technical Field

[0001] The present invention relates to an electromagnet device. Background Art

[0002] A double-winding latching electromagnetic relay is disclosed in Patent Document 1. The electromagnetic relay includes an electromagnet device. The electromagnet device includes three coil terminals arranged in the same direction. Each of the three coil terminals includes a bundling portion for connecting the lead wires of the coil. The bundling portion of the central coil terminal among the three coil terminals is bent in the direction in which the three coil terminals are arranged.

[0003] Prior Art Documents

[0004] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2015-041608

[0005] In the electromagnet device disclosed in Patent Document 1, since the bundling portion of the central coil terminal is bent in the direction in which the three coil terminals are arranged, the insulation distance between the central coil terminal and the coil terminal close to the bundling portion of the central coil terminal becomes short. When it is desired to ensure the insulation distance between the central coil terminal and the coil terminal close to the bundling portion of the central coil terminal, the electromagnet device may be enlarged.

[0006] An object of the present invention is to provide an electromagnet device that can suppress the enlargement of the electromagnet device and ensure the insulation distance between coil terminals. Summary of the Invention

[0007] An electromagnet device according to one aspect of the present invention includes a coil, a bobbin, a first coil terminal, a second coil terminal, and a third coil terminal. The bobbin includes a main body portion around which the coil is wound and a flange portion extending from the main body portion. The first coil terminal includes a first bundling portion extending from the flange portion in the axial direction of the main body portion. The second coil terminal includes a second bundling portion extending from the flange portion in the axial direction. The third coil terminal is disposed between the first coil terminal and the second coil terminal. The third coil terminal includes a third bundling portion. The third bundling portion includes a base end portion and a front end portion extending from the base end portion in a direction approaching the second bundling portion. The base end portion of the third bundling portion is eccentrically disposed with respect to the axis of the main body portion in a direction from the second coil terminal toward the first coil terminal.

[0008] In this electromagnet device, since the base end portion of the third bundling portion is eccentrically disposed with respect to the axis of the main body portion in the direction from the second coil terminal toward the first coil terminal, it is easy to ensure the insulation distance between the third bundling portion of the third coil terminal and the second bundling portion of the second coil terminal. Thereby, enlargement of the electromagnet device can be suppressed, and the insulation distance between coil terminals can be ensured. In addition, since the first coil terminal, the second coil terminal, and the third coil terminal can be constituted by common terminals, commonalization of terminal components can be achieved.

[0009] The third bundling portion may also have a length dimension substantially the same as the length dimension of the first bundling portion and the length dimension of the second bundling portion. In this case, the first bundling portion 71a, the second bundling portion 72a, and the third bundling portion 73a can be welded simultaneously by a jig.

[0010] The flange portion of the spool may also include: a terminal support portion that supports the third coil terminal; and a protrusion that faces the terminal support portion in the axial direction and can engage with the lead wire of the coil. The third bundling portion of the third coil terminal may also be disposed between the terminal support portion and the protrusion. In this case, when assembling the electromagnet device, by engaging the lead wire of the coil with the protrusion, it is possible to suppress the breakage of the lead wire due to the generation of tension in the lead wire when the third bundling portion is bent and restored after soldering the third bundling portion.

[0011] The distance from the base end portion of the third bundling portion to the first bundling portion may also be substantially the same as the distance from the tip of the front end portion of the third bundling portion to the second bundling portion. In this case, it is possible to efficiently ensure the insulation distance between the coil terminals in a limited space.

[0012] The electromagnet device may further include an insulating wall disposed at least on one side between the first bundling portion and the third bundling portion or between the second bundling portion and the third bundling portion. In this case, it is possible to improve the insulation between the coil terminals using the insulating wall.

[0013] The second coil terminal may also be a terminal having the same shape as the first coil terminal. The third coil terminal may also be a terminal formed by bending a terminal having the same shape as the first coil terminal. In this case, the first coil terminal, the second coil terminal, and the third coil terminal can be formed by common terminals, and thus the sharing of components can be achieved.

[0014] According to the present invention, it is possible to provide an electromagnet device that can suppress the enlargement of the electromagnet device and ensure the insulation distance between the coil terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a side view of the electromagnetic relay.

[0016] Figure 2 is a left side view of the electromagnet device.

[0017] Figure 3 is a diagram for explaining the operating state of the electromagnet device.

[0018] Figure 4 is a diagram for explaining the assembly sequence of the electromagnet device.

[0019] Figure 5This is a diagram for explaining the assembly sequence of the electromagnet device.

[0020] Figure 6 This is a diagram for explaining the assembly sequence of the electromagnet device.

[0021] Figure 7 This is a diagram for explaining the assembly sequence of the electromagnet device.

[0022] Figure 8 This is a left side view of the electromagnet device of the modified example.

[0023] Figure 9 This is a diagram for explaining a modified example of the protrusion.

[0024] Figure 10 This is a diagram for explaining a modified example of the protrusion.

[0025] Figure 11 This is a diagram for explaining a modified example of the protrusion. Detailed implementation mode

[0026] Hereinafter, an embodiment of an electromagnetic relay of an electromagnet device having one mode of the present invention will be described with reference to the accompanying drawings. When referring to the accompanying drawings, for the sake of easy understanding of the description, the upper side in Figure 1 is referred to as "upper", the lower side as "lower", the left side as "left", the right side as "right", the front side of the paper surface as "front", and the back side of the paper surface as "back" for explanation. These directions are defined for the convenience of explanation and do not limit the arrangement direction of the electromagnetic relay.

[0027] The electromagnetic relay 1 is a hinge-type electromagnetic relay. The electromagnetic relay 1 is a double-winding latching-type electromagnetic relay. As Figure 1 shown, the electromagnetic relay 1 includes a base 2, a contact device 3, and an electromagnet device 4. The base 2 is formed of an insulating material such as resin. A box-shaped cover member (not shown) is disposed on the upper portion of the base 2. The contact device 3 and the electromagnet device 4 are disposed in the internal space formed by the base 2 and the cover member.

[0028] The contact device 3 includes a fixed terminal 6, a movable contact piece 7, and a movable mechanism 8. The fixed terminal 6 and the movable contact piece 7 are plate-shaped terminals formed of a conductive material. The fixed terminal 6 and the movable contact piece 7 are supported by the base 2. The fixed terminal 6 and the movable contact piece 7 extend upward from the base 2.

[0029] The fixed terminal 6 includes a fixed contact 6a and an external connection portion 6b. The fixed contact 6a is disposed above the base 2. The fixed contact 6a is disposed on the right surface of the fixed terminal 6.

[0030] The external connection part 6b protrudes downward from the base 2 and is exposed to the outside. The external connection part 6b is electrically connected to an external device (not shown).

[0031] The movable contact piece 7 is formed of a leaf spring capable of elastic deformation and is arranged opposite to the fixed terminal 6 in the left-right direction. In the present embodiment, the movable contact piece 7 is arranged on the left side of the fixed terminal 6.

[0032] The movable contact piece 7 includes a movable contact point 7a and an external connection part 7b. The movable contact point 7a faces the fixed contact point 6a and can contact the fixed contact point 6a. The external connection part 7b is electrically connected to an external device (not shown).

[0033] The movable mechanism 8 moves the movable contact piece 7 in the direction in which the movable contact point 7a approaches the fixed contact point 6a and in the direction in which the movable contact point 7a moves away from the fixed contact point 6a. In the present embodiment, the moving direction of the movable contact piece 7 coincides with the left-right direction.

[0034] The movable mechanism 8 includes a card 10. The card 10 is rotatably supported by the base 2. The card 10 can rotate in the left-right direction with the lower end of the card 10 as the rotation fulcrum. The card 10 is arranged between the movable contact piece 7 and the electromagnet device 4. The card 10 is connected to the movable contact piece 7 and the electromagnet device 4.

[0035] The electromagnet device 4 moves the movable contact piece 7 via the movable mechanism 8 by electromagnetic force. The electromagnet device 4 rotates the card 10 by electromagnetic force, thereby moving the movable contact piece 7 in the left-right direction.

[0036] As Figures 1 to 3 shown, the electromagnet device 4 includes a coil 41, a bobbin 42, an iron core 43, a yoke 44, an auxiliary yoke 45, a permanent magnet 46, a movable iron piece 47, and a hinge spring 48.

[0037] The coil 41 is wound around the outer periphery of the bobbin 42. The bobbin 42 extends in the up-down direction. The axial direction of the bobbin 42 coincides with the up-down direction. As Figure 4 shown, the bobbin 42 includes a first flange 51, a second flange 52 (an example of a flange portion), a main body portion 53, and a housing portion 54.

[0038] The first flange 51 and the second flange 52 project from the main body portion 53. The first flange 51 is connected to the upper end of the main body portion 53. The second flange 52 is connected to the lower end of the main body portion 53. The first flange 51 and the second flange 52 extend in a direction intersecting the up-down direction. The outer diameter of the first flange 51 and the outer diameter of the second flange 52 are larger than the outer diameter of the main body portion 53.

[0039] The second flange 52 includes an upper surface portion 52a, a side wall 52b, a terminal support portion 52c, and a protrusion 52d. The upper surface portion 52a is disposed below the coil 41. The side wall 52b extends downward from the left end of the upper surface portion 52a. The side wall 52b is disposed between the upper surface portion 52a and the terminal support portion 52c. The terminal support portion 52c protrudes leftward from the lower end of the side wall 52b. The terminal support portion 52c extends in the front-rear direction.

[0040] The protrusion 52d is disposed above the terminal support portion 52c. The protrusion 52d and the terminal support portion 52c are opposed to each other in the vertical direction. The protrusion 52d can engage with the lead wire of the coil 41. The protrusion 52d protrudes leftward from the side wall 52b. The protrusion 52d is adjacent to the upper surface portion 52a. The protrusion 52d is disposed at a position overlapping the axis A of the main body portion 53 when viewed from the left-right direction.

[0041] The protrusion 52d includes a first surface 56 and an inclined surface 57 connected to the first surface 56. The first surface 56 is the front surface of the protrusion 52d. The first surface 56 is located at a position forward of the axis A of the main body portion 53. The inclined surface 57 extends rearward and downward from the lower end of the first surface 56.

[0042] The main body portion 53 has a cylindrical shape, and a coil 41 is wound around the outer periphery. The main body portion 53 extends in the vertical direction. The axial direction of the main body portion 53 coincides with the vertical direction.

[0043] The accommodating portion 54 is formed in the main body portion 53. When viewed from the vertical direction, the accommodating portion 54 is a circular hole. The accommodating portion 54 is formed by penetrating the central portion of the main body portion 53 in the vertical direction.

[0044] The iron core 43 is disposed inside the bobbin 42. The iron core 43 is accommodated in the accommodating portion 54. The iron core 43 is connected to the yoke 44. The axis of the iron core 43 extends in the vertical direction.

[0045] As Figure 3 shown, the yoke 44 is connected to the iron core 43, the auxiliary yoke 45, and the permanent magnet 46. The yoke 44 has a shape bent in an L shape. The yoke 44 supports the movable iron piece 47 so as to be rotatable. In addition, in Figure 3 the illustration of the bobbin 42 is omitted.

[0046] The yoke 44 includes a bottom portion 61 and an extension portion 62. The bottom portion 61 is disposed below the second flange 52. The bottom portion 61 is fixed to the lower end of the iron core 43. The extension portion 62 is bent upward from the right end of the bottom portion 61. The extension portion 62 is disposed on the right side of the coil 41.

[0047] The auxiliary yoke 45 is disposed below the bottom portion 61 of the yoke 44. The auxiliary yoke 45 is disposed between the bottom portion 61 of the yoke 44 and the base 2 in the vertical direction.

[0048] The permanent magnet 46 is disposed between the bottom 61 of the yoke 44 and the auxiliary yoke 45. The upper surface of the permanent magnet 46 contacts the yoke 44. The lower surface of the permanent magnet 46 contacts the auxiliary yoke 45.

[0049] The movable iron piece 47 is rotatably supported by the extension 62 of the yoke 44 via the hinge spring 48. The movable iron piece 47 can be Figure 1 rotated between the first position shown in Figure 3 and the second position shown in. The movable iron piece 47 is separated from the iron core 43 at the first position. The movable iron piece 47 contacts the iron core 43 at the second position. The second position corresponds to the operating position of the movable iron piece 47.

[0050] The hinge spring 48 is fixed to the extension 62 of the yoke 44. The hinge spring 48 is provided to hold the movable iron piece 47 at the extension 62 of the yoke 44.

[0051] Next, the operation of the electromagnetic relay 1 will be described. In addition, since the operation of the electromagnetic relay 1 is the same as that of the conventional electromagnetic relay, it will be briefly described. When no voltage is applied to the coil 41, due to the elastic force of the movable contact piece 7, the movable iron piece 47 is located at the first position, and the movable contact 7a is separated from the fixed contact 6a. At this time, using the magnetic flux of the permanent magnet 46, a magnetic path M1 passing through the auxiliary yoke 45 and the bottom 61 of the yoke 44, and a magnetic path M2 passing through the iron core 43, the movable iron piece 47, the yoke 44, and the auxiliary yoke 45 are formed.

[0052] If a voltage is applied to the coil 41 to generate a magnetic flux in the same direction as the magnetic flux flowing through the magnetic path M2, the magnetic flux generated by applying the voltage to the coil 41 forms a magnetic path passing through the iron core 43, the movable iron piece 47, and the yoke 44. As a result, the attractive force of the iron core 43 on the movable iron piece 47 increases, and the movable iron piece 47 rotates and moves from the first position to the second position. As the movable iron piece 47 moves from the first position to the second position, the plug 10 is pressed by the movable iron piece 47, and the movable contact 7a contacts the fixed contact 6a.

[0053] Even if the voltage application to the coil 41 is stopped, since the magnetic force of the magnetic path M2 is greater than the elastic force of the movable contact piece 7, the movable iron piece 47 is maintained at the second position.

[0054] If a recovery voltage in the opposite direction to the applied voltage is applied to the coil 41 to cancel the magnetic force of the magnetic path M2, the movable iron piece 47 moves from the second position to the first position, and the movable contact 7a is separated from the fixed contact 6a.

[0055] As shown in Figure 2As shown, the electromagnet device 4 includes a first coil terminal 71, a second coil terminal 72, and a third coil terminal 73. The first coil terminal 71 to the third coil terminal 73 are arranged and disposed in one direction (here, the front-rear direction). The first coil terminal 71 to the third coil terminal 73 are supported by a terminal support portion 52c. Holes for inserting the first coil terminal 71 to the third coil terminal 73 are formed in the terminal support portion 52c.

[0056] The first coil terminal 71 is disposed near the rear end of the terminal support portion 52c. The first coil terminal 71 is disposed at a position rearward of the axis A of the main body portion 53. The first coil terminal 71 is disposed at a position rearward of the coil 41. The first coil terminal 71 extends in the vertical direction.

[0057] The first coil terminal 71 includes a first bundling portion 71a and a first external connection portion 71b. The first bundling portion 71a is connected to the lead wire of the coil 41. The first bundling portion 71a extends in the vertical direction. The first bundling portion 71a protrudes upward from the terminal support portion 52c. The first external connection portion 71b protrudes downward from the terminal support portion 52c and is exposed to the outside.

[0058] The second coil terminal 72 is a terminal having the same shape as the first coil terminal 71. That is, the second coil terminal 72 is constituted by a terminal common to the first coil terminal 71. The second coil terminal 72 is disposed near the front end of the terminal support portion 52c. The second coil terminal 72 is disposed at a position forward of the axis A of the main body portion 53. The second coil terminal 72 is disposed at a position forward of the coil 41. The second coil terminal 72 extends in the vertical direction.

[0059] The second coil terminal 72 includes a second bundling portion 72a and a second external connection portion 72b. The second bundling portion 72a is connected to the lead wire of the coil 41. The second bundling portion 72a extends in the vertical direction. The second bundling portion 72a protrudes upward from the terminal support portion 52c. The second external connection portion 72b protrudes downward from the terminal support portion 52c and is exposed to the outside.

[0060] The third coil terminal 73 is disposed between the first coil terminal 71 and the second coil terminal 72. As Figure 2 shown, the third coil terminal 73 is eccentrically disposed with respect to the axis A of the main body portion 53 in the direction from the second coil terminal 72 toward the first coil terminal 71 (here, the rearward direction). When viewed from the left-right direction, the third coil terminal 73 is disposed between the first coil terminal 71 and the axis A of the main body portion 53.

[0061] The third coil terminal 73 includes a third bundling portion 73a and a third external connection portion 73b. The third bundling portion 73a is connected to the lead wire of the coil 41. The third bundling portion 73a projects upward from the terminal support portion 52c. The third bundling portion 73a has a bent shape. The third bundling portion 73a is bent in the direction approaching the second bundling portion 72a of the second coil terminal 72 (here, the front direction). The third bundling portion 73a is disposed between the terminal support portion 52c and the protrusion 52d. In the present embodiment, the third coil terminal 73 is formed by bending a terminal having the same shape as the first coil terminal 71. That is, the third coil terminal 73 is constituted by using a terminal common to the first coil terminal 71.

[0062] The third bundling portion 73a includes a base end portion 76 and a front end portion 77. The base end portion 76 projects upward from the terminal support portion 52c. The base end portion 76 is eccentrically disposed with respect to the axis A of the main body portion 53 in the direction from the second coil terminal 72 toward the first coil terminal 71. The base end portion 76 is disposed at a position closer to the first bundling portion 71a than the second bundling portion 72a. The base end portion 76 is located behind the protrusion 52d. The base end portion 76 is located behind the axis A of the main body portion 53.

[0063] The front end portion 77 extends from the base end portion 76 in the direction approaching the second bundling portion 72a. The front end portion 77 is disposed at a position closer to the second bundling portion 72a than the first bundling portion 71a. The front end portion 77 extends more forward than the protrusion 52d. That is, the front end of the front end portion 77 is located in front of the protrusion 52d. The front end portion 77 is separated from the terminal support portion 52c in the vertical direction. The front end portion 77 is disposed at a position closer to the protrusion 52d than the base end portion 76. The front end portion 77 faces forward and is inclined in the direction approaching the protrusion 52d. The third external connection portion 73b projects downward from the terminal support portion 52c and is exposed to the outside. The third external connection portion 73b is eccentrically disposed with respect to the axis A of the main body portion 53 in the direction from the second coil terminal 72 toward the first coil terminal 71.

[0064] The third bundling portion 73a has a length dimension substantially the same as the length dimension of the first bundling portion 71a and the length dimension of the second bundling portion 72a. The length dimension of the first bundling portion 71a is the dimension in the extending direction of the first bundling portion 71a, which corresponds to the vertical dimension of the first bundling portion 71a in the present embodiment. The length dimension of the second bundling portion 72a is the dimension in the extending direction of the second bundling portion 72a, which corresponds to the vertical dimension of the second bundling portion 72a in the present embodiment. The length dimension of the first bundling portion 71a is the same as the length dimension of the second bundling portion 72a. The length dimension of the third bundling portion 73a is the dimension from the base end portion 76 to the front end of the front end portion 77.

[0065] As Figure 2As shown, in the present embodiment, the distance D1 from the base end portion 76 of the third bundling portion 73a to the first bundling portion 71a is substantially the same as the distance D2 from the front end of the front end portion 77 of the third bundling portion 73a to the second bundling portion 72a. In addition, the distance D1 and the distance D2 do not necessarily have to be substantially the same. For example, the distance D1 may be longer than the distance D2.

[0066] Next, an example of the method for assembling the electromagnet device 4 will be described. As Figure 4 shown, a bobbin 42 and three coil terminals 70 of the same shape are prepared, and the three coil terminals 70 are press-fitted and fixed to the terminal support portion 52c, for example. The left coil terminal 70 corresponds to the first coil terminal 71, the right coil terminal 70 corresponds to the second coil terminal 72, and the central coil terminal 70 corresponds to the third coil terminal 73. At this time, the bundling portion 73a of the third coil terminal 73 extends in the same direction as the first bundling portion 71a and the second bundling portion 72a.

[0067] Next, as Figure 5 shown, the bundling portions (the first to third bundling portions 71a, 72a, 73a) of the three coil terminals 70 (the first coil terminal 71 to the third coil terminal 73) are bent in the same direction. Here, the bundling portions of the three coil terminals 70 are bent approximately 90° to the side opposite to the side wall 52b. Then, after one lead wire of the first winding (single dotted line) of the coil 41 is wound around the first bundling portion 71a, the winding is wound around the main body portion 53 in the clockwise direction by a predetermined amount. After that, the other lead wire of the first winding is led out so as to hook the front surface of the protrusion 52d, and then the other lead wire of the first winding is connected to the third bundling portion 73a.

[0068] Next, one lead wire of the second winding (double dotted line) of the coil 41 is connected to the third bundling portion 73a. Next, the other lead wire of the second winding is led out so as to hook the front surface of the protrusion 52d, and then the winding is wound around the main body portion 53 in the clockwise direction by a predetermined amount. Then, the other lead wire of the second winding is connected to the second bundling portion 72a.

[0069] Next, as Figure 6 shown, the first bundling portion 71a, the second bundling portion 72a, and the third bundling portion 73a are welded respectively.

[0070] Next, as Figure 7 shown, the first bundling portion 71a and the second bundling portion 72a are bent back to Figure 4The position shown. Rotate the third bundling portion 73a by 90° in the horizontal direction, and arrange the third bundling portion 73a between the protrusion 52d and the terminal support portion 52c. Since the lead wire connected to the third bundling portion 73a is arranged in such a way as to be hooked on the front surface of the protrusion 52d, when the third bundling portion 73a is rotated by 90° in the horizontal direction and the third bundling portion 73a is provided between the protrusion 52d and the terminal support portion 52c, the generation of tension in the lead wire can be suppressed, and thus the disconnection of the lead wire can be prevented. In addition, in Figure 6 and Figure 7 the illustration of the lead wire is omitted.

[0071] In the electromagnet device 4 of the electromagnetic relay 1 described above, the base end portion 76 of the third bundling portion 73a of the third coil terminal 73 is eccentrically arranged with respect to the axis A of the main body portion 53 of the bobbin 42 in the direction from the second coil terminal 72 toward the first coil terminal 71. Therefore, it is easy to ensure the insulation distance between the third bundling portion 73a of the third coil terminal 73 and the second bundling portion 72a of the second coil terminal 72. As a result, the enlargement of the electromagnet device 4 can be suppressed, and the insulation distance between the first coil terminal 71 and the third coil terminal 73, and the insulation distance between the second coil terminal 72 and the third coil terminal 73 can be ensured. In addition, the first coil terminal 71, the second coil terminal 72, and the third coil terminal 73 can be constituted by common terminals, so the generalization of the terminal components can be realized.

[0072] The embodiments of the electromagnetic relay according to one aspect of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the invention.

[0073] In the above embodiment, the first coil terminal 71 is arranged near the rear end of the terminal support portion 52c, and the second coil terminal 72 is arranged near the front end of the terminal support portion 52c. However, the arrangements of the first coil terminal 71 and the second coil terminal 72 can be swapped. In this case, the third coil terminal 73 is eccentrically arranged forward with respect to the axis A of the main body portion 53 of the bobbin 42.

[0074] Figure 8 is a left side view of the electromagnet device 4 of the modified example. The electromagnet device 4 further includes an insulating wall 80. The insulating wall 80 is arranged between the first bundling portion 71a and the third bundling portion 73a. The insulating wall 80 is integrally formed with the bobbin 42. The insulating wall 80 extends in a direction crossing the left-right direction. The insulating wall 80 protrudes upward from the terminal support portion 52c and is connected to the side wall 52b. The insulating wall 80 may be separate from the bobbin 42. The insulating wall 80 may also be arranged between the second bundling portion 72a and the third bundling portion 73a.

[0075] The shape of the protrusion 52d of the second flange 52 of the spool 42 can also be changed. Figures 9 to 11 This is a diagram for explaining a modified example of the protrusion 52d. As Figure 9 shown, the front end of the protrusion 52d can also protrude forward. The protrusion 52d can also protrude in the direction from the base end portion 76 to the front end portion 77 of the third bundling portion 73a. In this case, the movement of the lead wire of the coil 41 caught by the protrusion 52d can be restricted.

[0076] As Figure 10 and Figure 11 shown, the first surface 56 of the protrusion 52d can also include an inclined surface 56a. The inclined surface 56a is inclined in the direction from the front end of the protrusion 52d toward the base end and approaching the rear surface of the protrusion 52d.

[0077] The connection order of the lead wires of the coil 41 to the first to third bundling portions 71a, 72a, and 73a can also be changed. For example, after winding one lead wire of the first winding of the coil 41 around the third bundling portion 73a, the winding can be wound counterclockwise around the main body portion 53 by a predetermined amount, and then the other lead wire of the first winding can be wound around the first bundling portion 71a. After winding one lead wire of the second winding of the coil 41 around the second bundling portion 72a, the winding can be wound clockwise around the main body portion 53 by a predetermined amount, and then the other lead wire of the second winding can be wound around the third bundling portion 73a.

[0078] Explanation of reference numerals:

[0079] 1... electromagnetic relay; 41... coil; 42... spool; 52... second flange (an example of a flange portion); 52c... terminal support portion; 52d... protrusion; 53... main body portion; 71... first coil terminal; 71a... first bundling portion; 72... second coil terminal; 72a... second bundling portion; 73... third coil terminal; 73a... third bundling portion; 76... base end portion; 77... front end portion; 80... insulating wall.

Claims

1. An electromagnet device, characterized in that, Comprising: A coil; A bobbin, which includes a main body portion around which the coil is wound and a flange portion extending from the main body portion; A first coil terminal, which includes a first bundling portion extending from the flange portion along the axial direction of the main body portion; A second coil terminal, which includes a second bundling portion extending from the flange portion along the axial direction; And A third coil terminal, which includes a third bundling portion. The third bundling portion includes a base end portion and a front end portion extending from the base end portion in a direction approaching the second bundling portion. The third coil terminal is disposed between the first coil terminal and the second coil terminal, The base end portion of the third bundling portion is eccentrically disposed with respect to the axis of the main body portion in a direction from the second coil terminal toward the first coil terminal.

2. The electromagnet device according to claim 1, characterized in that The third bundling portion has a length dimension substantially the same as the length dimension of the first bundling portion and the length dimension of the second bundling portion.

3. The electromagnet device according to claim 1, characterized in that The flange portion of the bobbin includes a terminal support portion for supporting the third coil terminal and a protrusion opposed to the terminal support portion in the axial direction, The third bundling portion of the third coil terminal is disposed between the terminal support portion and the protrusion.

4. The electromagnet device according to claim 1, characterized in that The distance from the base end portion of the third bundling portion to the first bundling portion is substantially the same as the distance from the front end of the front end portion of the third bundling portion to the second bundling portion.

5. The electromagnet device according to claim 1, characterized in that The electromagnet device further includes an insulating wall, which is disposed at least on one of between the first bundling portion and the third bundling portion and between the second bundling portion and the third bundling portion.

6. The electromagnet device according to claim 1, characterized in that The second coil terminal is a terminal having the same shape as the first coil terminal, The third coil terminal is a terminal formed by bending a terminal having the same shape as the first coil terminal.

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