JPH09259727A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay by which an assembling characteristic can be improved and the occurrence of microwelding and locking between contact points can be eliminated by extendedly arranging a base end part of a movable spring whose movable contact point is arranged on the tip, in the lengthwise direction of a contactor. SOLUTION: In an electromagnetic relay, a movable spring 7 is positioned so as to run almost in parallel to the lengthwise direction of first and second armatures 2 and 3 by penetratingly supporting a support part 7a drawn at an almost right angle from the base end by a body 5. In a tip part of the movable spring 7, a movable contact point 7b is arranged in a position opposed to a fixed contact point. In this movable spring 7, a contact object part 7c with which a protrusion 4e protrusively arranged in the other end part of one piece 4b of a card 4 toward the movable spring 7 is brought into contact, is obliquely and extendedly arranged in the lengthwise direction of the first armature 2 from a reference part. Since there is no need to sandwich the movable spring 7 by a sandwiching part of the card 4, an assembling characteristic is improved. Even if contact points 6c and 7b causes microwelding and locking, the other end part of the first armature 2 in return operation comes into contact with the contact object part 7c of the movable spring 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay in which an armature is rotatably supported and movable.

[0002]

2. Description of the Related Art As a first conventional example of this type of electromagnetic relay, there is one having a structure shown in FIG. This one has an iron core A on which a coil is wound so that both ends become magnetic pole parts A ₁ and A ₂ .
An armature B in which the central portion in the longitudinal direction is rotatably supported and both ends B ₁ and B ₂ are attracted and released to the magnetic poles A ₁ and A ₂ at both ends of the iron core A, respectively, and an armature that is attracted and released. A card C driven by B and a movable contact D ₁ that is supported by the base end portion of the armature B along the longitudinal direction of the armature B and is pressed by one end of the card C in the longitudinal direction to abut the fixed contact. It has a so-called flexure structure including a movable spring D provided at the tip.

Next, the operation of this device will be described. When the coil is energized in the specified direction, both ends B ₁ and B ₂ are attracted to the magnetic poles A ₁ and A ₂ at both ends of the iron core A on which the coil is wound. To drive. That card C
Presses the movable spring D ₁ by the pressing portion C ₁ provided at one end, and the movable contact D ₁ provided at the tip of the movable spring D abuts the fixed contact. If the coil is energized in the reverse direction, the card C will rotate in the reverse direction and return so that the armature B
Both ends B ₁ and B ₂ of the card are attracted to the magnetic poles A ₁ and A ₂ of both ends of the iron core A, respectively, and when the pressing drive by the pressing part C ₁ of the card C is released, the movable part D recovers. Moving contact D ₁ separates from fixed contact.

As a second conventional example of this type of electromagnetic relay, there is one having a structure shown in FIGS. 7 and 8. This is an iron core A in which a coil is wound so that the magnetic poles A ₁ and A ₂ are at both ends, and the longitudinal center is rotatably supported and both ends B ₁ and B ₂ are iron cores. Armature B that is attracted and released to the magnetic poles A ₁ and A ₂ at both ends of A, a card C that is driven by the armature B that is attracted and released, and a base end that extends substantially parallel to the longitudinal direction of the armature B. A so-called FLOC structure including a movable spring D having a movable contact D ₁ at its tip end that is supported by a movable contact D ₁ that is driven while the central portion is sandwiched by one end in the longitudinal direction of the card C and contacts the fixed contact. belongs to.

Next, the operation of this device will be described. When the coil is energized in the specified direction, both ends B ₁ and B ₂ are attracted to the magnetic poles A ₁ and A ₂ at both ends of the iron core A on which the coil is wound. To drive. That card C
Drives the movable spring D while holding the central portion thereof by the holding portion C ₂ provided at one end, and the movable contact D ₁ provided at the tip of the movable spring D abuts the fixed contact. When the coil is energized in the opposite direction, both ends B ₁ and B ₂ of the armature B are attracted to both ends A ₁ and A ₂ of the iron core A so that the card C rotates in the opposite direction and returns. And the holding part of the card C
The movable spring D returns while the central portion is clamped by C ₂ , and the movable contact D ₁ separates from the fixed contact.

[0006]

The electromagnetic relay of the first conventional example described above has a relatively simple structure in which the pressing portion C ₁ is provided at one end of the card _C so as to be easily assembled. Is getting better.

However, in this case, since the opening force when the movable contact D ₁ separates from the fixed contact is only due to the spring force of the movable spring D, slight welding or rocking occurs between the contacts. I was unable to release it.

Further, in the electromagnetic relay of the second conventional example described above, the separating force when the movable contact D ₁ separates from the fixed contact is the spring force of the movable spring D and the restoring force of the card C. Since it is added, it can be released even when slight welding or locking occurs between the contacts.

However, this device is not easy to assemble because the movable spring D must be held by the holding portion C ₂ provided on the card C.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic relay which is easy to assemble and can be released even when slight welding or locking occurs between contacts. To do.

[0011]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, an iron core around which a coil is wound so that both ends serve as magnetic pole parts, and a central part in the longitudinal direction is wound. The armature is rotatably supported and both ends are attracted and released to the magnetic poles of both ends of the iron core, and the base end is supported so as to extend substantially parallel to the longitudinal direction of the armature, and is pressed to one end of the armature. And a movable spring having a movable contact which is brought into contact with the fixed contact and is provided at a tip portion thereof, in the electromagnetic relay,
The abutted portion, which is abutted against the other end of the armature during the returning operation so that the tip rotates about the base end in the contact opening direction, extends from the base end in the longitudinal direction of the armature. It has a structure extended to.

According to a second aspect of the present invention, in the first aspect of the present invention, the armature has a configuration in which a protrusion that abuts the abutted portion is provided so as to project toward the movable spring.

According to a third aspect of the present invention, in the first aspect, the contacted portion is provided with a reducing means for reducing its rigidity.

According to a fourth aspect of the present invention, in the third aspect, the reduction means has a widthwise dimension in the abutted portion that is larger than a dimension in the proximal direction of the movable spring in the same direction. Is also formed to be small.

According to a fifth aspect of the present invention, in the third aspect, the reducing means is configured such that the contacted portion is formed thinner than the base end portion of the movable spring. There is.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes an iron core, which is made of a magnetic material and is formed in a substantially U-shape with both end leg pieces as magnetic pole portions 1a and 1b, and a coil (not shown) is wound in the central portion. A permanent magnet (not shown) is arranged between the magnetic pole portions 1a and 1b at both ends of the iron core 1.

Reference numeral 2 denotes a first armature, which is made of a magnetic material and is formed in an elongated flat plate shape so that both end portions 2a, 2b in the longitudinal direction can face both end magnetic pole portions 1a, 1b of the iron core 1.

Reference numeral 3 is a second armature, and like the first armature 2, both ends 3a and 3b in the longitudinal direction are made of a magnetic material and are made of an iron core.
It is formed in an elongated flat plate shape so as to be able to face the magnetic pole portions 1a, 1b at both ends of 1. The second armature 3 together with the first armature 2 is rotatably supported at the center in the longitudinal direction via a card 4 described later.

Reference numeral 4 denotes a card, which is formed to have a substantially U-shaped portion consisting of a rectangular center piece 4a and opposing pieces 4b and 4c, and which is provided at the center of the center piece 4a in the longitudinal direction. The rotation shaft 5a is inserted into the hole 4d and is rotatably supported by the body 5.

A fixed contact plate 6 has a narrow portion 6a having a narrow width from the base end portion to the central portion and a wide portion 6b having a wide end portion. The fixed contact plate 6 has a narrow portion 6a penetratingly fixed to the body 5 and a wide contact portion 6b provided with a fixed contact 6c.

A movable spring 7 is made of a thin plate spring material such as a copper alloy, and a supporting portion 7a extending substantially at a right angle from the base end is pierced and supported by the body 5, and the first and second armatures 2 are provided. , 3
Is located substantially parallel to the longitudinal direction of the movable contact 7b, and a movable contact 7b is provided at the tip of the movable contact 7b at a position facing the fixed contact. The movable spring 7 has a contacted portion 7c that abuts a protrusion 4e protruding from the other end of the one piece 4b of the card 4 toward the movable spring 7 from the base end to the first armature. 2 extends diagonally in the longitudinal direction. The state in which the protrusion 4e of the card 4 contacts the contacted portion 7c of the movable spring 7 will be described later in detail.

Next, the operation will be described with reference to FIGS. 3 (a) to 3 (c). In the state of FIG. 3 (a), the first armature 2 is
One end 2a is attracted to one end magnetic pole 1a of the fixed iron core 1, and the other end 3b of the second armature 3 is attracted to the other end magnetic pole 1b of the fixed iron core 1. When the coil is energized in the specified direction in this state, one end portion 2a of the first armature 2 is released from the one end magnetic pole portion 1a of the fixed iron core 1 and the other end portion 2b of the first armature 2 is released according to the direction of the magnetization. Is attracted to the other magnetic pole portion 1b of the fixed iron core 1. The other end 3b of the second armature 3 has the other end magnetic pole part 1b of the fixed iron core 1.
And the other end magnetic pole part 1b of the fixed iron core 1
Is sucked. Then, the first and second first and second members whose longitudinal central portions are rotatably supported via the card 4
The armatures 2 and 3 of FIG. 3 rotate together with the card 4, and the pressing portion 4f protruding from one end of the card 4 that rotates together with
As shown in (b), the tip of the movable spring 7 is pressed to drive the movable contact 7b provided on the movable spring 7 into contact with the fixed contact plate 6.
Abutting against the fixed contact 6c of.

When the coil is energized in the reverse direction, the first
The other end 2b of the armature 2 is released from the other end magnetic pole part 1b of the fixed iron core 1, and the one end 2a is attracted to the one end magnetic pole part 1a of the fixed iron core 1. Further, one end 3a of the second armature 3 is released from the other end magnetic pole part 1b of the fixed iron core 1, and the other end 3b is attracted to the one end magnetic pole part 1a of the fixed iron core 1. Then, the first and second armatures 2 and 3 are rotated in the opposite direction to the above, and the card 4 is also rotated to return. In the card 4 thus returning, the pressing portion 4f at one end does not press and drive the tip of the movable spring 7, and the protrusion 4e at the other end of the movable spring 7 as shown in FIG. It contacts the contacted portion 7c. By doing this, the first armature 2 becomes a card
It comes into contact with the contacted portion 7c of the movable spring 7 via 4. As a result, the movable spring 7 is twisted in the vicinity of the base end and the distal end is rotated in the contact opening direction.
Is separated from the fixed contact 6c of the fixed contact plate 6.

In such an electromagnetic relay, the movable spring 7 does not have to be clamped by the clamping portion of the card 4 as in the second conventional example, so that it is easy to assemble.
Even if both contacts 6c and 7b are slightly welded or rocking, the tip of the twisted movable spring 7 near the base end rotates in the contact opening direction. The other end of
By abutting the contacted portion 7c of the movable spring 7 via the card 4 with the card 2b, it is possible to release the slight welding, locking, etc. between the contacts 6c, 7b.

Further, in the first armature 2, the projection 4e projecting from the card 4 toward the movable spring 7 comes into contact with the contacted portion 7c of the movable spring 7 and gives a concentrated impact, so It is possible to efficiently release fine welding and locking.

Next, a second embodiment of the present invention will be described below with reference to FIG. It should be noted that members having substantially the same functions as those in the first embodiment are designated by the same reference numerals, and only different points from those in the first embodiment will be described. In the first embodiment, the dimension in the width direction of the contacted portion 7c extending from the base end of the movable spring 7 is the same as the dimension in the base end of the movable spring 7 in the same direction. In the embodiment, the movable spring 7 is formed to have a size smaller than the dimension of the base end portion of the movable spring 7 in the same direction, and the reduction means 7d for reducing the spring force is provided.

In such an electromagnetic relay, in addition to the effects of the first embodiment, the first armature 2 is affected by an external impact or the like.
Even if the other end 2b of the contacting part 7c comes into contact with the contacted part 7c of the movable spring 7, the rigidity of the contacted part 7c extended from the base end part is adjusted so as not to malfunction. It can be reduced by the reducing means 7d and adjusted to an appropriate rigidity.

Further, the dimension in the width direction of the contacted portion 7c extending from the base end portion of the movable spring 7 can be made smaller than the dimension in the same direction of the base end portion of the movable spring by punching by a press or the like. Therefore, the reducing means 7d can be configured relatively easily.

Next, a third embodiment of the present invention will be described below with reference to FIG. It should be noted that members having substantially the same functions as those in the second embodiment are designated by the same reference numerals, and only different points from the second embodiment will be described. In the second embodiment, the reducing means 7d is the contacted portion extending from the base end of the movable spring 7.
Although it is provided by reducing the dimension of 7c in the width direction, in the present embodiment, the movable spring 7 in the contacted portion 7c is
It is provided by being formed so as to be thinner from the extended root portion near the base end portion to the distal end in the extending direction.

In this electromagnetic relay, in addition to the effect of the first embodiment, the other end portion 2b of the first armature 2 has a movable spring 7 due to an external impact or the like as in the second embodiment. Even if it comes into contact with the contacted part 7c, the spring force of the contacted part 7c extended from the base end is reduced by the reducing means 7d so that the movable spring 7 does not malfunction. Then, the spring force can be adjusted to an appropriate value.

Further, by pressing, the spring thickness can be made smaller toward the tip in the extending direction, so that there is a wide range of adjustment by the reducing means 7d.

In each of the first to third embodiments,
The card 4 has a protrusion 4e that abuts against the contacted portion 7c extending from the base end of the movable spring 7 and projects toward the movable spring 7.However, for example, the degree of slight welding or locking is extremely low. When it is very small, the protrusion 4e may not be provided, and in that case, the processing of the card 4 becomes easier.

In each of the first to third embodiments,
The first and second armatures 2 and 3 are rotatably supported via a card 4 and abut on the abutted portion 7c extending from the base end of the movable spring via the card 4. Although it is configured, it is directly rotatably supported without going through the card 4,
The same effect can be achieved even with the configuration in which the movable spring directly abuts on the abutted portion 7c extending from the base end portion of the movable spring.

In each of the first to third embodiments,
A structure in which the first and second armatures 2 and 3 are rotatably supported via a card 4 and abut on the abutted portion 7c extending from the base end of the movable spring via the card 4. In addition, the projection 4e that abuts the contacted portion 7c extending from the base end portion of the movable spring 7 is projected on the card 4, but the first and second armatures 2 and 3 are It is rotatably supported without passing through 4,
The armature 2 of the contacted part extending from the base end of the movable spring
The first armature has a projection 4e that abuts the abutted portion 7c extending from the base end of the movable spring 7 so as to directly abut the 7c.
The same effect can be obtained even if it is provided on the second side.

In each of the first to third embodiments,
Although it is a polarized electromagnetic relay having a permanent magnet, a non-polar electromagnetic relay having no permanent magnet can also achieve the same effect.

[0037]

According to the first aspect of the present invention, the movable spring does not have to be held by the holding portion of the card unlike the second conventional example, so that the assemblability is good, and both contacts are Even if slight welding or rocking occurs, the other end of the armature during return operation contacts the contacted portion of the movable spring so that the tip of the movable spring rotates in the contact opening direction. It is possible to release slight welding or locking between the contacts.

According to a second aspect of the present invention, in the armature, the projections projecting toward the movable spring come into contact with the abutted portion of the movable spring to give a concentrated impact. Therefore, it is possible to efficiently release fine welding, rocking, and the like.

According to the third aspect, in addition to the effect of the first aspect, the other end of the armature may come into contact with the abutted portion of the movable spring due to an external impact or the like. Also, the rigidity of the abutted portion extending from the base end portion can be reduced by the reducing means so that the malfunction does not occur, and the rigidity can be adjusted to an appropriate rigidity.

According to a fifth aspect, in addition to the effect of the fourth aspect, the dimension in the width direction of the abutted portion extending from the base end portion of the movable spring is changed by punching by a press or the like. Since the size of the base end portion of the movable spring in the same direction can be made smaller, the reduction means can be configured relatively easily.

According to the sixth aspect, in addition to the effect of the fourth aspect, since the spring thickness can be made smaller toward the tip end in the extending direction by press working, the width of adjustment by the reducing means can be reduced. Can have

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view showing an operation state of the above.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is a perspective view showing a third embodiment of the present invention.

FIG. 6 is a perspective view showing a first conventional example.

FIG. 7 is a perspective view showing a second conventional example.

FIG. 8 is a partial perspective view showing a state in which the above movable spring is clamped.

[Explanation of symbols]

 1 iron core 1a one end magnetic pole part 1b other end magnetic pole part 2 first armature 2a one end part 2b other end part 3 second armature 3a one end part 3b other end part 4e protrusion 6c fixed contact 7 movable spring 7b movable contact 7c Contacted part 7d Reduction means

Claims (5)

[Claims] 1. An iron core on which a coil is wound so that both ends thereof are magnetic pole parts, and a central part in the longitudinal direction is rotatably supported so that both end parts are respectively suction-released to both end magnetic pole parts of the iron core. An armature, and a movable spring having a movable contact at its distal end, the proximal end of which is supported substantially parallel to the longitudinal direction of the armature, and the movable contact that is pressed and driven by one end of the armature to contact the fixed contact. In the electromagnetic relay described above, the movable spring has a contacted portion that is in contact with the other end of the armature that is returning so that the distal end rotates in the contact opening direction around the base end. An electromagnetic relay, wherein the electromagnetic relay extends from a base end portion in a longitudinal direction of the armature. 2. The electromagnetic relay according to claim 1, wherein the armature has a protrusion that abuts the abutted portion, the protrusion protruding toward the movable spring. 3. The electromagnetic relay according to claim 1, wherein the contacted portion is provided with a reducing means for reducing the rigidity thereof. 4. The reduction means is formed such that the widthwise dimension of the abutted portion is smaller than the dimension of the base end portion of the movable spring in the same direction. Electromagnetic relay. 5. The electromagnetic relay according to claim 3, wherein the reducing means is formed such that the thickness of the contacted portion is smaller than that of the base end portion of the movable spring.