JP2013196772A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly productive electromagnetic relay without the need of highly accurate positioning.SOLUTION: An electromagnetic relay 11 includes a base 13, a cover 14, an electromagnet part erected on the base 13, a movable iron piece 26 to be swung by a magnetic flux generated by magnetization and demagnetization of the electromagnet part, and a contact mechanism part 32 comprising contacts 34 and 37 to be in contact and separated by pressurizing force of the swung movable iron piece 26. A display member 41 turnably disposed at shaft parts at both ends detects the magnetic flux and the front and the back are inverted visibly from the outside.

Description

  The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay with an operation display function.

  Conventionally, as an electromagnetic relay with an operation display function, for example, in Patent Document 1, as shown in FIG. 4, when a voltage is applied to a relay, an iron piece 41 is attracted and a resin with excellent visibility provided on the iron piece 41. An indicator piece 8 made of is opposed to a display window 9 formed transparently on the upper surface of the case 2. For this reason, the electromagnetic relay which can observe an operation state from the outside by the indicator piece 8 being visually recognizable from the display window 9 is disclosed.

JP 2007-250237 A

  However, the above-described electromagnetic relay has a problem in that it is difficult to position the indicator piece with respect to the display window of the case, resulting in poor productivity.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a highly productive electromagnetic relay that does not require highly accurate positioning.

In order to solve the above problems, an electromagnetic relay according to the present invention is:
From a base, a cover, an electromagnet portion erected on the base, a movable iron piece oscillated by a magnetic flux generated by excitation and demagnetization of the electromagnet portion, and a contact point that contacts and separates by the pressing force of the oscillating movable iron piece An electromagnetic relay comprising:
The display member that spans the shaft portions at both ends detects the magnetic flux, and the front and back are reversed so that they can be seen from the outside.

  According to the present invention, since the operating state can be confirmed by visually observing the display member that detects and reverses the magnetic field from the outside, it is not necessary to position the display member with high accuracy, and the display member is provided with a simple configuration. So productivity can be improved. Moreover, since magnetic force is utilized, the abrasion which arises when components contact each other can be prevented.

You may span the said display member on the inner wall which the said cover opposes so that rotation is possible.
Thereby, the visibility from the outside of a display member is high.

The display member may be pivotably spanned between a pair of protrusions that are erected so as to face an upper end edge of a spool that forms an electromagnet portion that is erected on the base.
Providing at the upper edge of the spool makes it easier to assemble and further improves productivity.

The display member includes a three-dimensional main body, a permanent magnet fixed to the main body, a rotating shaft eccentric with respect to the central axis of the main body, and a visible display color provided on a part of the main body. Part.
By using a permanent magnet for the display member, generation of burrs during manufacturing can be suppressed.

The display coloring portion may be formed by coloring one surface of the display member.
Thereby, the structure of a display member becomes simple, productivity can be improved and manufacturing cost can be reduced.

(A) is a perspective view of the electromagnetic relay which concerns on 1st Embodiment of this invention, (B) is front sectional drawing of (A). (A) is a top view of the display member of this invention, (B) is a right view of (A), (C) is a front view of (A). (A) is a right side view before leakage magnetic flux acts on the display member, (B) is a right side view in which the leakage magnetic flux acts on the display member and is inverted, and (C) is a display member where the leakage magnetic flux disappears. The right view of the state which returned to the original. (A) is front sectional drawing of the electromagnetic relay which concerns on 2nd Embodiment of this invention, (B) is an expansion perspective view around the display member of (A).

An embodiment of an electromagnetic relay according to the present invention will be described with reference to FIGS.
(First embodiment)
As in the first embodiment shown in FIG. 1A, the electromagnetic relay 11 is fixed to the base 13 provided with a spool 16, a yoke 21, and a contact mechanism 32, which will be described later, and the base 13. And a cover 14 that covers the spool 16 and the like.

  As shown in FIG. 1B, the spool 16 is a cylindrical trunk portion 17 erected on the base 13, and a circle provided at the upper end of the trunk portion 17 and having a diameter larger than that of the trunk portion 17. And a jaw portion 18 made of a plate. A T-shaped iron core 20 is disposed on the inner periphery of the body portion 17, and a coil 19 is wound around the outer periphery of the body portion 17, and the upper portion of the iron core 20 serves as a magnetic pole portion. The spool 16, the iron core 20, and the coil 19 form an electromagnet portion.

  The yoke 21 is substantially L-shaped made of a magnetic material, and has a base end portion 22 and an upright portion 23. A base end portion 22 located on the lower side of the yoke 21 is fixed to the lower end portion of the iron core 20. A movable iron piece 26 is rotatably supported on the upper end of the upright portion 23 located above the yoke 21.

  The movable iron piece 26 is substantially L-shaped, and includes a suction portion 27 positioned above the jaw portion 18 and a drive portion 28 that drives the card 39. In the movable iron piece 26, the coil 19 is excited, and the attracting portion 27 is attracted to the magnetic pole portion of the iron core 20. For this reason, the movable iron piece 26 rotates around the pivotal support portion 29 supported by the upper end of the standing portion 23 of the yoke 21, and the drive portion 28 moves the card 39 to the opposite side of the coil 19. The yoke 21, together with the iron core 20 and the movable iron piece 26, becomes a magnetic path for magnetic flux generated by excitation of the coil 19.

  The contact mechanism portion 32 includes a fixed contact piece 33 and a movable contact piece 36 provided side by side on the base 13. A fixed contact 34 is provided at the upper end of the fixed contact piece 33, and a movable contact 37 is provided at the upper end of the movable contact piece 36. The fixed contact 34 and the movable contact 37 are arranged so as to be able to contact and separate at a predetermined interval. In addition, a card 39 is disposed between the movable contact piece 36 and the movable iron piece 26, and the movable contact piece 36 is pressed against the fixed contact piece 33 via the card 39 when the drive unit 28 swings and displaces. To do.

  The cover 14 is provided with an insulating plate 15 for partitioning the coil 19, the yoke 21, the movable iron piece 26 side and the contact mechanism portion 32 in order to improve insulation.

  Further, a display member 41 according to the present invention is spanned over the cover 14 so as to be rotatable above the spool 16. As shown in FIGS. 2A to 2C, the display member 41 includes a rectangular parallelepiped display main body 42, a plate-like permanent magnet 43 stacked and fixed inside the display main body 42, and the display main body. And a rotating shaft 44 provided at a position eccentric with respect to the central axis L of 42. The bottom surface of the display main body 42 is colored in a color that is easy to see, such as red, and forms a display coloring portion 45. For this reason, the structure of the display member 41 is simple, productivity can be improved and manufacturing cost can be reduced. Further, since the rotation shaft 44 is eccentric, the display member 41 is attached to the cover 14 with its own weight and inclined.

  In addition, in order to visually recognize the display coloring portion 45 from the outside, at least the upper surface side of the cover 14 is formed to be substantially transparent. However, the display colored portion 45 is not limited to the upper surface side as long as it can be visually recognized from the outside, and the side surface may be formed to be transparent. Further, the cover 14 itself is made of a non-transparent material, and a transparent display window (not shown) for visually recognizing the display coloring portion 45 is provided at an arbitrary position on the upper surface or side surface of the cover 14. May be. However, the shape of the display window is not particularly limited. At this time, since it is only necessary to visually recognize the display coloring portion 45 from the outside, it is not necessary to position the display member 41 on the cover 14 with high accuracy, and assembling is facilitated, and productivity is further improved.

  Next, the operation of the electromagnetic relay 11 will be described.

  Before the voltage is applied to the coil 19, the movable contact 37 is separated from the fixed contact 34 by the spring force of the movable contact piece 36, and the card 39 is biased toward the coil 19, so that the drive unit 28 of the movable iron piece 26 is applied. Is pressed to the coil 19 side. For this reason, the adsorption | suction part 27 of the movable iron piece 26 is arrange | positioned at intervals with the upper end of the iron core 20. As shown in FIG.

  When a voltage is applied to the coil 19 and excited, a magnetic flux is generated in the iron core 20, the attracting portion 27 of the movable iron piece 26 is attracted to the magnetic pole portion of the iron core 20, and the movable iron piece 26 is illustrated with the pivot portion 29 as a center. During 1 (B), it rotates counterclockwise to form a closed magnetic circuit. For this reason, the drive part 28 presses the card | curd 39 to the contact mechanism part 32 side. As a result, the card 39 presses the movable contact piece 36 toward the fixed contact piece 33, and the movable contact 37 contacts the fixed contact 34.

  When a voltage is applied to the coil 19, a leakage flux F is generated from the coil 19 as shown in FIG. The N pole on the side repels and pushes up the permanent magnet 43. For this reason, as shown in FIG. 3B, the display member 41 rotates around the rotation shaft 44 until the N pole on the arrow side of the leakage flux F and the S pole of the display member 41 are attracted to each other. The coloring portion 45 is held at the display position located on the upper side. Thereby, it can confirm that the electromagnetic relay 11 is an operation state by visually inspecting the coloring part 45 for a display from the outside. Moreover, since it is not necessary to position the display member 41 on the cover 14 with high accuracy, and it is only necessary to provide the display member 41 with a simple configuration, the productivity of the electromagnetic relay 11 can be improved. Furthermore, since magnetic force is used, wear caused by contact between parts can be prevented. And since the display member 41 is arrange | positioned in the ceiling surface vicinity of the cover 14, the visibility from the exterior of the display member 41 is high.

  Next, when energization of the coil 19 is stopped, the magnetic flux disappears and the magnetic attractive force is lost. For this reason, the card 39 is pushed back by the spring force of the movable contact piece 36, and the movable contact 37 is separated from the fixed contact 34. At the same time, since the leakage magnetic flux F disappears, the display member 41 rotates counterclockwise around the rotation shaft 44 from the display position, and returns to the original state shown in FIG.

(Second Embodiment)
The present invention can be variously modified and is not limited to the case where the display member 41 is bridged over the cover 14 as in the first embodiment described above. For example, as shown in FIGS. 4A and 4B, a pair of support members 48 are provided on the upper end edge of the jaw 18 constituting the spool 16 so as to face each other, and provided on the support member 48. The rotating shaft 44 of the display member 41 may be inserted into the circular hole 49 and bridged. By providing the display member 41 on the support member 48 as in the present embodiment, it becomes easier to assemble and the productivity is further improved.

  The display member 41 is not limited to a rectangular parallelepiped, and may be any shape that can be reversed by magnetic flux. For example, the display member 41 may be a cylinder, a sphere, or an oval cross section. Moreover, you may employ | adopt the structure which colors the single side | surface or both surfaces of the display main body 42. FIG.

DESCRIPTION OF SYMBOLS 11 Electromagnetic relay 13 Base 14 Cover 16 Spool 19 Coil 21 Yoke 32 Contact mechanism part 34 Fixed contact 37 Movable contact 41 Display member 42 Display main body 43 Permanent magnet 44 Rotating shaft (shaft part)
45 Coloring section for display 48 Support member (projection)

Claims (5)

From a base, a cover, an electromagnet portion erected on the base, a movable iron piece oscillated by a magnetic flux generated by excitation and demagnetization of the electromagnet portion, and a contact point that contacts and separates by the pressing force of the oscillating movable iron piece An electromagnetic relay comprising:
An electromagnetic relay, characterized in that a display member that spans shafts at both ends detects a magnetic flux, and the front and back are reversed so as to be visible from the outside.   2. The electromagnetic relay according to claim 1, wherein the display member is rotatably mounted on an inner wall facing the cover.   The display member is rotatably mounted between a pair of projecting portions erected so as to face an upper end edge of a spool that forms an electromagnet portion erected on the base. Item 2. The electromagnetic relay according to Item 1.   The display member includes a three-dimensional main body, a permanent magnet fixed to the main body, a rotating shaft eccentric with respect to the central axis of the main body, and a visible display color provided on a part of the main body. The electromagnetic relay according to any one of claims 1 to 3, wherein the electromagnetic relay has a portion.   The electromagnetic relay according to claim 4, wherein the display coloring portion is formed by coloring one surface of the display member.

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