JP5525672B2 - Electromagnetic relay yoke structure - Google Patents

Description

  The present invention relates to a structure of a yoke of an electromagnetic relay with few operation obstacles.

  When the electromagnetic relay is activated, the movable spring integrated with the yoke collapses in the direction of the relay body due to the adsorption of the electromagnet, and at that time the movable spring comes into contact with the flange of the yoke. Deformation has occurred, or the mounting position of other parts has become distorted due to vibrations at the time of contact, resulting in an operational failure.

  Conventionally, in order to prevent the above operation failure, as shown in FIG. 12, an outward angle (θ) is provided on the upper part of the movable spring of the relay. In this way, since there is a gap (margin) between the upper part of the movable spring and the yoke when the movable spring is adsorbed, it is possible to avoid the movable spring coming into direct contact with the yoke.

As an example of such a relay, JP-A-2006-210289 and JP-A-2007-103193 are shown.
The thing shown by Unexamined-Japanese-Patent No. 2006-210289 is shown by FIG. 11, and the thing of Unexamined-Japanese-Patent No. 2007-103193 is shown by FIG.

The structure and operation of FIG. 11 are as follows. In the following description, reference is made to the above-mentioned Japanese Patent Application Laid-Open No. 2000-210298 (FIGS. 1 and 2) for the reference numerals of the components.
The electromagnetic relay shown in FIG. 11 includes a base, an electromagnet assembled to the base, and a contact portion assembled to the base and opening / closing as the electromagnet operates. Between the electromagnet and the contact portion, an armature that is driven by the electromagnet to open and close the contact portion is installed. It can be seen that the movable spring 44 in FIG. 11 is bent at an angle (θ) outwardly at the lateral upper portion 31 as in FIG.

  The base portion is made of an electrically insulating resin molded product, and integrally includes a first portion where an electromagnet is mainly disposed and a second portion where a contact portion is mainly disposed. The first portion has a saucer-like structure including a bottom plate having a rectangular shape in plan view and a pair of side plates extending upright along both long edges of the bottom plate. In addition, the second portion is disposed on one short edge of the bottom plate of the first portion, and has a columnar structure that is erected sufficiently higher than the side plate of the first portion. The other short edge of the bottom plate of the first part is open. The base has an L-shape as a whole when viewed from the front.

  The electromagnet includes a winding frame, a coil that is wound around and supported by the winding frame, an iron core that is incorporated in the winding frame along the central axis of the coil, and a yoke that extends from the iron core to the outside of the winding frame and the coil. Is provided. The winding frame is an electrically insulating resin molded product, and integrally includes a hollow body portion having a predetermined length and annular first and second flange portions provided at both ends in the longitudinal direction of the body portion. The coil is formed by tightly winding a required length portion of a conducting wire around the body portion of the winding frame, and is fixedly held between both flange portions of the winding frame.

The iron core is a columnar member made of, for example, magnetic steel, and its substantially cylindrical main portion is concentrically arranged with the central axis of the coil and is fixedly received in the body of the winding frame.
The yoke is an L-shaped plate member made of, for example, magnetic steel, and is fixedly connected to the iron core protrusion by, for example, caulking to form a magnetic path around the coil.

  The yoke is connected to the protrusion of the iron core and is disposed along the first flange portion of the winding frame, and is disposed substantially orthogonal to the first plate portion, to the side of the coil. A long second plate portion that is spaced apart and extends substantially parallel to the coil center axis is integrally provided. The end of the second plate portion of the yoke is disposed in the vicinity of the second flange portion of the winding frame at the same axial position as the head end surface of the iron core, and the armature swings adjacent to this end. Possible to be supported by a yoke.

  The armature is a flat plate-shaped rigid member formed of, for example, magnetic steel, and is supported by an electromagnet yoke so as to be elastically movable relative to a later-described movable contact spring member mounted on the contact portion. It is arranged opposite to the head of the iron core.

  The armature cooperates with the iron core and the yoke of the electromagnet to form a magnetic circuit using a coil. When the electromagnet is not operated, the armature is held stationary at a recovery position in which the main surface is separated from the end face of the iron core by a predetermined distance. When the electromagnet operates, the armature swings in a direction in which the main surface approaches the head end surface due to the magnetic attractive force.

  The contact portion includes a first fixed contact member having a make fixed contact, a movable contact spring member 44 having a movable contact, and a second fixed contact member having a break fixed contact. The first fixed contact member is punched out of a conductive sheet metal material into a predetermined shape and bent into an L-shape. The first fixed contact member has an end portion in the longitudinal direction for supporting the make fixed contact, and an intermediate portion substantially orthogonal to the support portion. An attachment portion and a fixed contact lead portion at the other end in the longitudinal direction extending in a pin shape from the attachment portion are provided. The make fixed contact is formed from a desired contact material, and is fixed to the carrying part by caulking, for example, so as to bulge away from the attachment part.

  The second fixed contact member is punched out of a conductive sheet metal material into a predetermined shape and bent into an L shape. The second fixed contact member has an end portion in the longitudinal direction for supporting the break fixed contact and an intermediate portion substantially orthogonal to the support portion. An attachment portion and a fixed contact lead portion at the other end in the longitudinal direction extending in a pin shape from the attachment portion are provided. The break-fixed contact is formed from a desired contact material and is fixed to the carrying part, for example by caulking, so as to bulge to the side close to the attachment part.

  The movable contact spring member 44 is composed of a conductive thin plate member that is punched into a predetermined shape from a thin phosphor bronze spring plate and bent into an L-shape, and includes a carrying portion at one end in the longitudinal direction carrying the movable contact, A first mounting portion that extends substantially parallel to the portion, a second mounting portion that extends in a direction substantially orthogonal to the first mounting portion, and an L-shape between the first mounting portion and the second mounting portion. A substantially central elastic hinge portion that is extended and a movable contact lead portion at the other end in the longitudinal direction that extends from the second attachment portion in a pin shape on the opposite side of the elastic hinge portion are integrally provided.

  The movable contact spring member 44 is supported by the electromagnet with the first mounting portion 44b fixed to the armature by, for example, caulking, and the second mounting portion fixed to the second plate portion of the yoke by, for example, caulking. In this state, the carrying portion of the movable contact spring member is extended outward beyond the second flange portion of the winding frame in a direction intersecting the coil center axis.

  The movable contact is made of a desired contact material and is fixed to the carrying part, for example by caulking, so as to bulge on both sides of the carrying part. With the movable contact spring member 44 properly attached to the electromagnet and the electromagnet properly assembled to the first part of the base, the movable contact is between the make fixed contact and the break fixed contact, and the coil center axis of the electromagnet. It is arranged so as to be displaceable in a substantially parallel direction (vertical direction in the figure), and can come into contact with both fixed contacts alternately.

  In the movable contact spring member 44, the elastic hinge portion exerts a spring action between the armature and the yoke, and biases the armature in a direction away from the head of the iron core. Therefore, when the electromagnet is inactive, the armature has its one end portion adjacent to the end of the second plate portion of the yoke and the main surface is the end surface of the head of the iron core under the spring action of the movable contact spring member 44. It is held stationary at a recovery position that is a predetermined distance away from. In this state, the movable contact of the movable contact spring member 44 contacts the break fixed contact of the second fixed contact member under pressure, thereby closing the break contact. When the electromagnet is actuated from this restoration position, the armature is moved to the iron core head against the spring force of the elastic hinge portion of the movable contact spring member 44 around the one end adjacent to the yoke end by the magnetic attraction force. Swings in the approaching direction. Accordingly, the movable contact of the movable contact spring member 44 contacts the make fixed contact of the first fixed contact member under pressure, and thereby the make contact is closed.

  13 shown in Japanese Patent Application Laid-Open No. 2007-103193 is similar to the above. In this case, the relay is a horizontal type, but the upper part of the side piece parallel to the electromagnet of the movable spring 33 is also shown in FIG. Similar to 12, it can be seen that it is bent outwardly at an angle (θ).

In this way, the conventional electromagnetic relay is devised to prevent contact of the movable spring near the fulcrum at the top of the yoke in FIG.
However, in order to manufacture such a movable spring bent at an angle (θ) outwardly, the plate spring is punched out with a press, and as shown in FIG. Further, a pressing process is required to bend 18 and to give the upper portion of the vertical piece an angle (θ) outward as shown in FIG.

JP 2006-210289 A JP 2007-103193 A

  The present invention has a structure in which the movable spring does not contact the yoke at the upper part of the side of the yoke where the movable spring of the relay is in contact with the movable spring without providing an angle for preventing contact particularly outward. An object of the present invention is to provide a structure for preventing the above-described problem.

  In order to achieve the above object, the relay yoke structure of the present invention has a relief process on the upper part of the yoke side where the movable spring of the relay abuts, and a recess is formed on the upper part of the yoke side. In particular, the movable spring adopts a structure that prevents an operation failure of the relay by making no contact with the yoke without making an angle outward.

  Further, the yoke relief process is characterized by utilizing a sag surface in the yoke press process.

  In the relay yoke structure of the present invention, when this structure is adopted, the angle of the side upper part of the movable spring, which has been necessary in the past, becomes unnecessary, and therefore the manufacturing process of the movable spring is reduced by one. Is easy and the manufacturing cost is reduced.

It is a whole perspective view of the yoke structure used for the electromagnetic relay of this invention. It is a side view of the yoke structure used for the electromagnetic relay of this invention. It is the side view seen from the left of FIG. 2 of the yoke structure used for the electromagnetic relay of this invention. It is the perspective view which looked at FIG. 3 of the yoke structure used for the electromagnetic relay of this invention from diagonally upward. It is a whole side view of the electromagnetic relay using the yoke of this invention. 1 is an overall perspective view of an electromagnetic relay using a yoke of the present invention. It is a figure which shows the example of the movable spring used for the electromagnetic relay using the yoke of this invention. It is a perspective view of the example of the yoke attached to the upper side lower part of the movable spring of FIG. It is a figure which shows the resin-made spools used as the frame | skeleton of the electromagnetic relay of FIG. 5, FIG. It is explanatory drawing of the utilization of a sag surface in the press work of a yoke. It is a figure which shows the example of the conventional electromagnetic relay. It is explanatory drawing of the movable spring of the conventional electromagnetic relay. It is a figure which shows the other example of the conventional electromagnetic relay.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall perspective view of a yoke structure used in the electromagnetic relay of the present invention. 2 is a side view of the yoke structure used in the electromagnetic relay of the present invention, and FIG. 3 is a side view of the yoke structure used in the electromagnetic relay of the present invention as viewed from the left in FIG.

4 is a perspective view of the yoke structure used in the electromagnetic relay of the present invention as viewed obliquely from above, and FIG. 5 is an overall side view of the electromagnetic relay using the yoke of the present invention.
As shown in FIGS. 1 to 3, the horizontal piece 6 and the vertical piece 7 in FIG. 1 are integrated to form a yoke. As shown in FIGS. 3 to 4, notched recesses 10 and 11 are provided on the upper left and right sides of the vertical piece 7 of the yoke. As will be described later, the recessed portions 10 and 11 are provided in the vicinity of contact when the movable spring 12 is attracted toward the main body when the electromagnetic relay is operated.

  Therefore, when such reliefs (recesses 10 and 11) are formed, when the movable spring integrated with the yoke falls due to the adsorption of the electromagnet and falls toward the relay body, the movable spring is yoked when the electromagnet is activated. There is no direct contact with the sides. Therefore, when the electromagnetic relay is activated and the movable spring contact of the electromagnetic relay comes into contact with the yoke, the movable spring is deformed, or the mounting position of other parts is distorted due to vibration at the time of contact, There is no problem of operation failure.

  In the case of the above embodiment, the concave portion is the case where the movable spring 23 of FIG. 7 is used. Therefore, the concave portions 10 and 11 (FIGS. 3 and 4) of the yoke are in contact with the movable spring 23. However, depending on the structure of the movable spring, it may not necessarily be near the upper ends of the yoke. .

  Moreover, although the said recessed part may be formed by cutting, you may utilize increasing the sagging surface in the press work of yoke material. FIG. 10 shows an image of utilizing the sag surface. This method is useful for cost reduction because the process becomes simpler.

  5 and 6 show general views of an electromagnetic relay in which the yoke of the present invention is used. As shown in FIGS. 1 and 2, the yoke 5 is fixed by disposing the horizontal piece 6 below the electromagnet and the vertical piece 7 on the side parallel to the electromagnet. On the other hand, as shown in FIG. 7, the movable spring 12 is disposed outside the vertical piece 7 of the yoke and fixed to the relay body as shown in FIGS. In FIG. 7, the tips 21 and 22 of the movable spring are divided into two branches, but this is an example of a two-contact type, and in the case of a normal one-contact type, there is no need to split into two. The movable spring 12 has an inverted L-shaped cross section formed of a vertical piece 23 (FIG. 7) disposed outside the vertical piece 7 of the yoke 5 and a horizontal piece 18 (FIG. 7) bent from the vertical piece 23. The yoke 15 shown in FIG. 8 is integrated with the lower part of the horizontal piece 18 (FIG. 7). The yoke 15 is arranged and assembled so as to be above the iron core of the electromagnet 13 (FIG. 5).

  In the electromagnetic relay (FIGS. 5 and 6) having the above structure, when the electromagnet 13 is operated, the yoke 15 is attracted to the electromagnet, and the movable spring is also moved downward. Therefore, the contacts (18, 19 in FIG. 6) provided at the tip of the movable spring come into contact with the output fixed contacts provided below the contacts, and a conduction path through the make contact is formed. The electromagnetic relay operates by a magnetic circuit including the iron core of the electromagnet 13, the yoke 5, and the upper yoke 15.

  As an example of an electromagnetic relay in which the yoke of the present invention is used, FIG. 6 shows an overall perspective view of a large-current power supply opening / closing or emergency cutoff relay 1 having in-vehicle redundancy. For reference, a lateral side view is also shown in FIG.

In FIG. 6, 5 is a yoke, 12 is a movable spring, 3 is a spool (FIG. 9), 13 is an electromagnet (coil winding), 4 is a coil terminal, 6 is a fixed output terminal, and 8 is a base.
The mounting method of each component is the same as that of the conventional relay of FIGS. 10 and 12, and is performed by caulking or the like.

  In FIG. 9, a coil winding is wound around the central cylinder 35 of the spool 3, and the coil terminal 4 (FIG. 6) is attached to the spool 3. Further, an iron core (not shown) is inserted into the center hole of the spool 3, thereby forming an electromagnet 13 (FIGS. 5 and 6).

  The spool 3 (FIG. 9) serves as a skeleton of the resin-made electromagnetic relay. The iron core is inserted into the center hole of the spool 3, and the yoke 5 (FIG. 1) is movable as shown in FIG. The spring 12 (FIG. 7), the fixed terminal 6, the base 8 and the like are attached to the spool 3, and the relay body is completed. The yoke of the present invention can be applied not only to the case where a spool as shown in FIG. 9 is used but also to other electromagnetic relays having the same structure as shown in FIGS.

  That is, the electromagnetic relay of the present invention includes a coil that is supported by being wound around a coil winding frame provided on a spool 3 that is erected on a base (base) portion, and a coil that is supported along the central axis of the coil. It has an electromagnet 13 composed of an iron core to be incorporated, and a yoke 5 provided from the bottom of the iron core to the outside of the coil and a movable spring 12 provided to the outside of the coil are integrated. And a movable spring 12 having an inverted L-shaped cross section that is incorporated in the spool 3 and extends to the upper part of the iron core, and an electromagnetic attracting member integrated with the movable spring between the movable spring and the upper part of the iron core ( Yoke 15) is incorporated in the spool 3, and contacts provided at the tips 21, 22 (FIG. 7) of the movable spring 12 and output contacts provided below or above the contacts are provided, and the electromagnet By energizing the movable spring Make an input via the output contact, or to form an electromagnetic relay to perform a break operation.

  In the case of the above embodiment, the relay of the present invention is such that the tip of the single movable spring 12 branches into two as shown in FIG. 15, and has contacts at the tips 21 and 22 of the branches, respectively. The output contacts 18 and 19 are provided in correspondence with the contacts at the tip of the branch. In the above embodiment, the output contacts 18 and 19 are make contacts provided only on the lower side of the contacts provided on the movable spring tips 21 and 22, but the output contact is provided on the movable spring tip. You may have both the make contact provided in the lower side of the provided contact, and the break contact provided in the upper side of the contact provided in the front-end | tip of a movable spring.

  In the above embodiment, each of the output contacts is connected to a common output terminal (twin contact) 6 to form a single output for use in the circuit. However, depending on the application, if necessary, a break twin contact may be provided on the upper side, or the output terminal is divided into two, and the two output side make contacts or break contacts are separated from each other. It may be connected to this circuit.

  As described above, when the structure of the yoke of the electromagnetic relay according to the present invention is adopted, the angle of the side upper part of the movable spring, which has been conventionally required, becomes unnecessary, and therefore there is one process for manufacturing the movable spring. This has the effect of facilitating the manufacture and the effect of reducing the manufacturing cost.

  Also, in the case of the conventional structure of the angled upper part of the side of the movable spring, the angle may be reduced due to secular change and may cause a failure, but the structure of the movable spring of the electromagnetic relay of the present invention does not have this drawback, There are few failures, the reliability of the product is improved, and the industrial applicability is high.

1 Electromagnetic Relay 3 Spool 4 Coil Terminal 5 Yoke 6 Output Terminal 8 Base (Bottom Plate)
12 Movable spring 13 Electromagnet 15 yoke

Claims (2)

An electromagnet comprising a base, a coil winding frame standing on the base, a coil supported by being wound around the winding frame, and an iron core incorporated in the winding along the central axis of the coil is provided. A yoke provided outward from the coil from the bottom of the iron core, and a movable spring having an inverted L-shaped cross section integrated with the yoke provided outward from the coil and extending to the upper part of the iron core. , An electromagnetic adsorption member made of a yoke integrated with the movable spring between the movable spring and the upper part of the iron core, a contact provided at the tip of the movable spring, and below or above the contact an output contact provided, by adsorbing the electromagnetic suction member by supplying an electric current to the electromagnet, make an input via the movable spring into the output contact, or an electromagnetic relay to perform a break operation, the relay The movable spring of the electromagnetic relay Perform manufacturing clearance in the yoke upper portion of the side surface of the near portion abuts when it is sucked into the main body direction during operation, by forming a recess in the yoke side upper, movable spring of the relay to the yoke without angling outward A structure of a yoke of an electromagnetic relay, characterized in that the contact failure is prevented so as not to contact the relay. 2. The structure of a yoke of an electromagnetic relay according to claim 1, wherein the yoke relief process utilizes a sag surface in the yoke press process.