JP2006236704A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of suppressing generation of an arc when a contact part is opened. <P>SOLUTION: This electromagnetic relay is equipped with an insulating sheet 6 formed like a sheet by a flexible insulating material so that its left end part is connected to a contact 2 and its right end part is hung from the upper side of the contact part 3, and an insulating plate 7 made of an insulator and connected to the right end of the insulating sheet 6. In a state where an electromagnet device 1 is not excited, the insulating plate 7 is held between a movable contact 31 and a stationary contact 32, and if the electromagnet device 1 is excited, the insulating plate 7 is pulled upward and extracted from the space between the movable contact 31 and the stationary contact 32. Generation of the arc is suppressed by the insulating plate 7 when the contact part 3 is opened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electromagnetic relay.

Conventionally, it has been provided with a contact portion composed of a movable contact and a fixed contact, an armature made of a magnetic material and mechanically coupled to the movable contact, and an electromagnet device, and the armature is driven by the magnetic force of the electromagnet device. There has been provided an electromagnetic relay for moving a movable contact to and from a fixed contact (opening and closing a contact portion) (see, for example, Patent Document 1).
JP 2002-343215 A

  In this type of electromagnetic relay, when the movable contact moves away from the fixed contact (the contact part opens), an arc is generated between the movable contact and the fixed contact, and the heat generated by the arc causes a slight amount of electromagnetic relay components. It sometimes deformed. When such deformation of the parts accumulates, the distance between the movable contact and the fixed contact with the contact portion opened is shortened to such an extent that sufficient insulation cannot be secured for the voltage to be handled. Therefore, the life of the electromagnetic relay was shortened.

  This invention is made | formed in view of the said reason, The objective is to provide the electromagnetic relay which can suppress generation | occurrence | production of the arc at the time of a contact part opening.

  According to the first aspect of the present invention, there is provided a contact portion comprising a fixed contact and a movable contact facing the fixed contact, an electromagnet device, an armature made of a magnetic material and driven by the magnetic force of the electromagnet device, and the electromagnet device from excitation to non-excitation. Returning means for returning the armature when switching to, driving body that is connected to the armature and the movable contact and opens and closes the contact part according to the excitation / de-excitation of the electromagnet device, and made of insulating material, interlocked with the armature And an arc breaker inserted between the fixed contact and the movable contact when the contact portion is opened.

  According to the present invention, when the contact portion is opened, the arc contact between the fixed contact and the movable contact is blocked by the arc breaker, so that the generation of an arc when the contact portion is opened can be suppressed.

  The invention of claim 2 is the invention of claim 1, further comprising a suspended body formed in a sheet shape by a flexible material and having one end portion suspended from above the contact portion and an arc breaker coupled to the one end portion. The other end of the suspended body is connected to the armature in such a direction that the arc breaker rises when the armature is attracted to the electromagnet device.

  According to this invention, when the contact portion is opened, the arc breaker is driven by gravity, so that the response speed when the contact portion is opened is improved as compared with the case where the arc breaker is driven by the return means.

  According to a third aspect of the present invention, in the first aspect of the invention, at least in a state where the contact portion is open, the ring shape surrounds one of the movable contact and the fixed contact and is connected to the armature and the arc breaker respectively. The annular body has a through-hole through which the movable contact passes when the contact portion is closed.

  According to this invention, unlike the invention of claim 2, the direction of installation is not limited.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, an annular shape surrounding one of the movable contact and the fixed contact is connected to the armature and the arc breaker, and operates in the circumferential direction in conjunction with the armature. And a conductor made of a conductive material and exposed to the inside and outside of the annular body and coupled to the annular body and interposed between the movable contact and the fixed contact when the contact portion is closed. .

  According to this invention, unlike the invention of claim 2, the direction of installation is not limited. Further, the mechanical strength of the annular body is improved as compared with the invention of claim 3.

  According to the present invention, since the arc breaker is inserted between the fixed contact and the movable contact when the contact portion is made of an insulating material and interlocked with the armature, the fixed contact is provided when the contact portion is opened. And the movable contact are blocked by the arc breaker, so that the generation of an arc when the contact portion is opened can be suppressed.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1A and 1B, the present embodiment includes an electromagnet device 1, an armature 2 made of a magnetic material and driven by the magnetic force of the electromagnet device, a movable contact 31, and a fixed contact 32. The armature 2 is connected to the contact portion 3, the movable spring 33 holding the movable contact 31, the fixed plate 34 holding the fixed contact 32 at a position facing the movable contact 31, the armature 2 and the movable spring 33, respectively. And the movable spring 33, and the electromagnet device 1, the armature 2, the contact portion 3, and the container 5 in which the coupling body 4 is housed. Hereinafter, the vertical and horizontal directions are based on FIGS. 1A and 1B, and the direction perpendicular to the paper surface of FIGS. 1A and 1B is referred to as the front-rear direction.

  More specifically, the container body 5 includes a base 51 having a flat base 51a constituting the lower surface of the container body 5, a rectangular parallelepiped shape having an open lower surface, and a cover 52 attached to the upper side of the base 51. Consists of.

  The electromagnet device 1 includes a coil bobbin 12 around which a coil 11 is wound in a direction to generate a vertical magnetic field, an iron core 13 inserted through the coil bobbin 12, and is disposed on the right side of the coil bobbin 12 and protrudes upward from the coil bobbin 12. The yoke 14 is provided. Further, two terminal plates 15 each made of a conductive material and vertically passing through the base portion 51a of the base 51 and having one end portion of the coil 11 electrically connected to the upper end portion are provided. Is energized through the terminal board 15.

  The armature 2 has a right end portion supported by the upper end portion of the yoke 14 and a left end portion located above the iron core 13, and an obtuse angle with respect to the adsorption portion 21 that protrudes downward from the right end of the adsorption portion 21. And is formed in an L-shape as a whole. Further, the armature 2 can be turned left and right around the right end portion of the suction portion 21 supported by the upper end portion of the yoke 14.

  The fixing plate 34 is made of, for example, a conductive material such as metal, and has a holding portion (not shown) held by the base 51 and a contact holding portion 34a that protrudes above the base 51a of the base 51 and is provided with a fixed contact 32. And a terminal portion 34 b protruding downward from the base portion 51 a of the base 51. The movable spring 33 is made of a conductive material having elasticity such as metal, for example, and a terminal plate 35 made of a conductive material and vertically passing through the base 51a of the base 51 is coupled to the lower end of the movable spring 33. The movable contact 31 is located on the right side of the connecting portion 22 of the armature 2 and faces the fixed contact 32 from the left side of the fixed contact 32. The movable spring 33 is connected to the connecting portion 22 of the armature 2 via the connecting body 4.

  The connecting body 4 is provided with a flange portion 41 whose front and rear and upper and lower width dimensions are larger than those of other portions, and this flange portion 41 abuts on a restriction portion (not shown) provided on the base 51. Therefore, the left and right movable ranges of the connection body 4 are limited. Moreover, the coupling body 4 is made of an insulating material, and the collar portion 41 has an effect of improving the insulation between the electromagnet device 1 and the contact portion 3.

  Further, on the upper surface of the base 51 a of the base 51, the upper pressing portion 51 b whose upper end portion is close to the inner bottom surface of the cover 52 is upward on both the front and rear sides of the movable contact 31 and the front and rear sides of the right end portion of the armature 2. Projected. As the upper pressing part 5, for example, an insulating wall that insulates between the electromagnet device 1 and the contact part 3 can be used.

  Further, in the present embodiment, for example, a flexible insulating material such as polyvinyl chloride is formed into a sheet shape, and the left end portion is connected to the left end portion of the adsorbing portion 21 of the armature 2 so as to cover the upper end of the upper presser portion 51b and the cover. An insulating sheet 6 whose right end portion is suspended from the upper side of the contact portion 3 through the inner bottom surface of 52 and an insulating plate 7 made of ceramic, for example, held at the right end portion of the insulating sheet 6 are provided. The insulating plate 7 is held on the insulating sheet 6 by sticking using an adhesive, for example. When the electromagnet device 1 is not excited, the insulating plate 7 is sandwiched between the movable contact 31 and the fixed contact 32 as shown in FIG. Thereby, for example, even when the container body 5 vibrates left and right, the contact between the movable contact 31 and the fixed contact 32 is prevented by the insulating plate 7. 1 (a) and 1 (b), due to the elasticity of the insulating sheet 6, the right end portion of the insulating sheet 6 is inclined to the right as it approaches the tip.

  The operation of this embodiment will be described. When the coil 11 is energized through the terminal 15 and the electromagnet device 1 is excited, the attracting portion 21 of the armature 2 is attracted to the electromagnet device 1, and the armature 2 has the upper end of the yoke 14 as a fulcrum as shown in FIG. Turn counterclockwise in a). Then, the left end portion of the insulating sheet 6 is pulled by the armature 2 so that the right end portion of the insulating sheet 6 is lifted, and the insulating plate 7 is moved to the movable contact 31 and the fixed contact 32 as indicated by an arrow A1 in FIG. It is pulled out from between. At the same time, the connecting portion 22 of the armature 2 presses the movable spring 33 to the right via the connecting body 4, and the movable spring 33 is elastically deformed, so that the movable contact 31 becomes the fixed contact 32 as shown in FIG. (The contact portion 3 is closed).

  Next, when the energization of the coil 11 is stopped and the excitation of the electromagnet device 1 is released, the movable spring 33 is restored by the spring force, and the movable contact 31 is separated from the fixed contact 32 (the contact portion 3 is opened). At the same time, the armature 2 receives the spring force of the movable spring 33 through the connecting body 4 to the connecting portion 22 and rotates clockwise in FIG. 1B to return to the position before the coil 11 is energized. . That is, the movable spring 33 is a return means. At the same time, the insulating plate 6 is inserted between the movable contact 31 and the fixed contact 32 by its own weight as shown by the arrow A2 in FIG. 1A or the arrow A3 in FIG.

  According to the above configuration, since the insulating plate 7 enters between the movable contact 31 and the fixed contact 32 when the contact portion 3 is opened, generation of an arc is suppressed. That is, the insulating sheet 6 is a suspended body in the claims, and the insulating plate 7 is an arc breaker in the claims.

  Instead of providing the insulating plate 7, the right end portion of the insulating sheet 6 may be an arc breaker.

(Embodiment 2)
Since the basic configuration of the present embodiment is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 3A and 3B, the present embodiment is characterized in that the insulating sheet 6 of the first embodiment is formed in an annular shape surrounding the movable contact 31 when viewed from the front. That is, the insulating sheet 6 of the present embodiment corresponds to an annular body in the claims.

  Further, the cover 52 is provided with lower pressing portions 52a that protrude downward from the inner bottom surface of the cover 52 and press a part of the insulating sheet 6 against the base portion 51a of the base 51. It is provided on both the front and rear sides. As shown in FIGS. 4 (a) and 4 (b), the insulating sheet 6 is provided with a through hole 61 that avoids the electromagnet device 1, the upper pressing portion 51b, and the movable spring 33, and avoids the lower pressing portion 52a. Cutouts 62 are provided in the upper front and rear ends (the left and right ends in FIGS. 4A and 4B), respectively. Further, the upper surface of the base 51a of the base 51 has an L-shaped cross section with the tip bent to the right, and is in contact with the inner surface of the right end of the insulating sheet 6 and holds the position of the right end of the insulating sheet 6. A presser portion 51c protrudes upward.

  Further, the through hole 61 that avoids the movable spring 33 in the insulating sheet 6 has a size that reaches the left side of the fixed contact 32 as shown in FIG. 4B when the attracting portion 21 of the armature 2 is attracted to the electromagnet device 1. It has become. The insulating plate 7 is held above the through hole 61.

  The operation of this embodiment will be described. When the coil 11 is energized through the terminal 15 and the electromagnet device 1 is excited, the attracting portion 21 of the armature 2 is attracted to the electromagnet device 1, and the armature 2 has the upper end of the yoke 14 as a fulcrum as shown in FIG. Turn counterclockwise in a). Then, by pulling the left end portion of the insulating sheet 6 to the armature 2, the insulating sheet 6 operates counterclockwise as indicated by an arrow A 4 in FIG. 3B, and the insulating plate 7 is placed on the upper side of the insulating sheet 6. It is pulled by tension and pulled upward from between the movable contact 31 and the fixed contact 32. At the same time, the connecting portion 22 of the armature 2 presses the movable spring 33 to the right via the connecting body 4 so that the movable spring 33 is elastically deformed, and the movable contact 31 passes through the through-hole 61 and passes through FIG. As shown in FIG. 4, the contact is conducted to the fixed contact 32 (the contact portion 3 is closed).

  Next, when the energization of the coil 11 is stopped and the excitation of the electromagnet device 1 is released, the movable contact 31 is separated from the fixed contact 32 by the spring force of the movable spring 33 (the contact portion 3 is opened) and the armature. 2 receives the spring force of the movable spring 33 through the connecting body 4 to the connecting portion 22 and rotates clockwise in FIG. 3B to return to the position before the coil 11 is energized. That is, the movable spring 33 is a return means. At the same time, when the left end portion of the insulating sheet 6 is pulled upward by the adsorbing portion 21 of the armature 2, the insulating sheet 6 operates clockwise as indicated by an arrow A5 in FIG. It is pulled downward by the tension of the lower part of the insulating sheet 6 and inserted between the movable contact 31 and the fixed contact 32 as shown in FIG.

  According to the said structure, generation | occurrence | production of an arc can be suppressed with the insulating board 7 similarly to Embodiment 1. FIG. Furthermore, in the first embodiment, gravity is used as a driving force when the insulating plate 7 is inserted between the movable contact 31 and the fixed contact 32. For example, when the insulating plate 7 is installed upside down, the insulating plate 7 is In contrast, in this embodiment, the spring force of the movable spring 33 transmitted to the insulating plate 7 through the coupling body 4, the armature 2, and the insulating sheet 6 is fixed to the movable contact 31. Since it is used as a driving force for insertion between the contact 32 and the first embodiment, the installation direction is not limited, unlike the first embodiment.

  For example, a conductive plate (not shown) made of a conductive material such as metal is used to close a portion located between the movable contact 31 and the fixed contact 32 when the contact portion 3 is closed in the through hole 61. You may hold | maintain to the insulating sheet 6 by sticking using an agent. In this case, when the contact portion 3 is closed, the movable contact 31 and the fixed contact 32 are electrically connected via the conductive plate. If this configuration is adopted, the through hole 61 becomes smaller and the insulating sheet 6 is mechanically reinforced by the conductive plate as compared with the case where the movable contact 31 is passed through the through hole 61. Therefore, the mechanical strength of the insulating sheet 6 is increased. improves.

It is the partially broken front view which shows Embodiment 1 of this invention, (a) shows the state which the contact part opened, (b) shows the state which the contact part closed. It is a partially broken right side view showing the same. It is the partially broken front view which shows Embodiment 2 of this invention, (a) shows the state which the contact part opened, (b) shows the state which the contact part closed. It is the partially broken right view which shows the same as the above, (a) shows the state which the contact part opened, (b) shows the state which the contact part closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnet apparatus 2 Armature 3 Contact part 6 Insulation sheet 7 Insulation plate 31 Movable contact 32 Fixed contact 33 Movable spring

Claims (4)

A contact portion comprising a fixed contact and a movable contact facing the fixed contact, an electromagnet device, an armature made of a magnetic material and driven by the magnetic force of the electromagnet device, and an armature when the electromagnet device is switched from excitation to non-excitation A return means for returning the contact, a driving body connected to the armature and the movable contact, and opening and closing the contact portion according to excitation / de-excitation of the electromagnet device,
An electromagnetic relay comprising an arc breaker made of an insulating material and inserted between a fixed contact and a movable contact when a contact portion is opened in conjunction with an armature.   A suspension body is formed of a flexible material in a sheet shape and has one end portion suspended from above the contact portion and an arc breaker coupled to the one end portion. The other end portion of the suspension body has an armature as an electromagnetic device. 2. The electromagnetic relay according to claim 1, wherein the arc breaker is connected to the armature in a direction in which the arc breaker rises when it is attracted.   At least in a state where the contact portion is open, it has a ring shape surrounding one of the movable contact and the fixed contact, and is connected to the armature and the arc breaker respectively, and includes an annular body that operates in the circumferential direction in conjunction with the armature, The electromagnetic relay according to claim 1, wherein the annular body has a through hole through which the movable contact passes when the contact portion is closed.   An annular body that encloses one of the movable contact and the fixed contact and is connected to the armature and the arc breaker respectively and operates in the circumferential direction in conjunction with the armature; The electromagnetic relay according to claim 1, further comprising: a conductor that is coupled to the annular body in an exposed manner and is interposed between the movable contact and the fixed contact when the contact portion is closed.

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