JP2003317596A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic relay easy to assemble and improved in reliability. <P>SOLUTION: The electromagnetic relay comprises a case, a body, an electromagnet, an armature, a card, a movable spring, fixed contacts, coil terminals, movable contact terminals, and fixed contact terminals. The electromagnet is made of coil which is winded around a coil bobbin having a yoke, an iron core and a bobbin rib. The movable contact comes into contact or loses contact with the fixed contacts when a specified voltage is applied to the coil terminals. An end of the card has a prescribed size of flat pressing part which presses an end of the movable spring. The end of the movable spring has a card-position controlling part directed to approximately perpendicular to the direction in which the card moves in order to control the movement of the card away from the end of the spring. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay that operates contacts according to energization of an electromagnet.

[0002]

2. Description of the Related Art Conventionally, as this type of electromagnetic relay, for example, as shown in FIGS.
There is an electromagnetic relay disclosed in 430. Note that FIG.
(A), (b), (c) and (d) are respectively a front view with the case cut out, a plan view, a left side view and a right side view, and FIG. 8 is an exploded perspective view excluding the case. Figure,
9 is a perspective view showing the case and the inside of the case, and FIG. 10 is a perspective view.

This electromagnetic relay has coil terminals 11a, 1
When a predetermined voltage is applied to 1b, the movable contact 9a makes contact with and separates from the fixed contacts 10a and 10b,
Box-shaped case 1 having a predetermined space inside, and case 1
A body 2 which is housed and fixed inside, a yoke 4 having a substantially L shape, and one end 5a magnetically coupled to one side 4a of the yoke 4, and the other end 5b extends to the vicinity of the other side 4b of the yoke 4. A yoke 4 composed of an iron core 5 and a coil wound around a coil bobbin 6 having a predetermined bobbin rib 6a surrounding the iron core 5.
Is fixed to the body 2, and the base end portion 7a is rotatable on the other side 4b of the yoke 4 and is biased by the return spring 14 in a direction away from the other end portion 5b of the iron core 5. The armature 7 is supported and driven by the electromagnet 3, and the bobbin rib 6a is provided with a bobbin rib insertion hole 8a for guiding the bobbin rib 6a. The armature insertion portion 8c provided at the base end portion 8b has a tip end portion 7b of the armature 7. Is inserted and armature 7
A movable spring 9 having a movable contact 9a and a movable end 9b movable by receiving a pressing force from the distal end 8d of the card 8, and a fixed contact with and separated from the movable contact 9a. Contact points 10a and 10b, coil terminals 11a and 11b electrically connected to both ends of the coil, and movable contact terminal 12 and fixed contact terminals 13a and 13b electrically connected to the movable contact 9a and fixed contacts 10a and 10b, respectively. , Are provided.

Next, the operation of the electromagnetic relay will be described. In a steady state in which no voltage is applied between the coil terminals 11a and 11b, the attraction force by the electromagnet 3 does not act, so that the armature 7 is moved from the other end 3b of the electromagnet 3 by the spring force of the return spring 14 and the movable spring 9. Remote position (hereinafter,
It is called "steady position". ). On the other hand, the movable spring 9 is arranged in the body 2 so that the movable contact 9a is brought into pressure contact with the fixed contact 10a on the side close to the electromagnet 3 (normally closed side). Therefore, when the armature 7 is in the steady position,
When the card 8 is moving to the left in FIG. 7A and the movable spring 9 is not pushed by the tip 8d of the card 8, the movable contact 9a contacts the fixed contact 10a on the normally closed side (hereinafter , "Steady state"). At this time, the contact pressure between the movable contact 9a and the fixed contact 10a is obtained by the spring force of the movable spring 9 formed of an elastic material.

From the steady state, the coil terminals 11a, 11
When a predetermined voltage (above the excitement voltage) is applied between b, the armature 7 is attracted to the other end 3b of the electromagnet 3, and the other side 4b of the yoke 4 is used as a fulcrum for the return spring 14 and the spring of the movable spring 8. It rotates against the force and is attracted to the other end 3b of the electromagnet 3. Then, the rotation of the armature 7 causes the card 8 to move to the position shown in FIG.
The card 8 is moved in parallel to the right in FIG.
At d, the movable spring 9 is pushed and rocked to the right in the figure. The movable contact 9 fixed to the movable spring 9
a is the other (normally open side) apart from the fixed contact 10a on the normally closed side
The fixed contact 10b is contacted and the contact is switched. When the voltage applied between the coil terminals 11a and 11b becomes equal to or lower than the open circuit voltage, the armature 7 released from the attraction force of the electromagnet 4 returns to the steady position by the spring force of the return spring 14 and the movable spring 9, The movable spring 9 is returned to the steady state when the pressing by the card 8 is released, and the movable contact 9a is separated from the fixed contact 10b on the normally open side and comes into contact with the fixed contact 10a on the normally closed side to switch the contact.

[0006]

By the way, in the above electromagnetic relay, the projection 8i is provided at the tip 8d of the card 8, and the projection insertion hole 9f is provided at the tip 9b of the movable spring 9. The position of the tip 8d of the card 8 is regulated by the protrusion 8i and the protrusion insertion hole 9f.

However, when assembling the above electromagnetic relay, the work of inserting the projection 8i into the projection insertion hole 9f is troublesome. Further, in the above-described electromagnetic relay, in order to prevent the protrusion 8i from rubbing in the protrusion insertion hole 9f and generating friction powder during operation, it is necessary to perform a special process called burring on the protrusion insertion hole 9f. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic relay in which the assembly process is simplified and the reliability is improved.

[0009]

An electromagnetic relay according to a first aspect of the present invention includes a case having a predetermined space inside, a body housed and fixed in the case, and a yoke having a substantially L shape. The yoke is made up of a coil wound around a coil bobbin having one end magnetically coupled to one side of the yoke and the other end extending to the vicinity of the other side of the yoke and a predetermined bobbin rib surrounding the iron core. An electromagnet fixed to the armature and an armature whose base end is rotatable to the other side of the yoke and is spring-biased and supported by a return spring in a direction away from the other end of the iron core and driven by the electromagnet. A card that has a bobbin rib insertion hole that is inserted through the bobbin rib and is guided by the bobbin rib, and the distal end of the armature is inserted into the armature insertion portion provided at the base end, and the card can move in accordance with the rotation of the armature,
A movable spring which has a movable contact and whose tip moves when receiving a pressing force from the tip of the card, a fixed contact which comes into contact with and separates from the movable contact, a coil terminal electrically connected to both ends of the coil, a movable contact and An electromagnetic relay comprising a fixed contact and a movable contact terminal and a fixed contact terminal, each of which is electrically connected to the fixed contact, wherein the movable contact makes contact with and separates from the fixed contact when a predetermined voltage is applied to the coil terminal. , The card is provided with a flat pressing portion having a predetermined area for applying a pressing force to the tip of the movable spring, and the movable spring is substantially orthogonal to the moving direction of the card at the tip. It is characterized in that a card position restricting portion is provided for restricting the movement of the card in the direction in which the tip of the card moves away from the tip of the movable spring.

According to a second aspect of the present invention, in the electromagnetic relay according to the first aspect, the pressing portion is provided at the bent portion where the tip end portion of the card is bent in a direction substantially orthogonal to the moving direction of the card. .

According to a third aspect of the invention, in the electromagnetic relay according to the second aspect, the bent portion has a protrusion formed substantially parallel to the pressing portion, and the tip of the movable spring has the protrusion. It has a concave portion into which is fitted, and when the pressing portion of the card applies a pressing force to the distal end portion of the movable spring, the projection portion comes into contact with the concave portion.

According to a fourth aspect of the present invention, in the electromagnetic relay according to the second or third aspect, when the pressing portion applies a pressing force to the tip of the movable spring, the card position regulating portion causes the card moving direction to move. A step portion having a surface substantially parallel to the card position restricting portion that restricts the movement of the card in a direction substantially orthogonal to the direction in which the distal end portion of the card separates from the distal end portion of the movable spring and a direction substantially orthogonal to this direction. Shall have.

According to a fifth aspect of the present invention, in the electromagnetic relay according to the first to fourth aspects, the bobbin rib insertion hole and the armature insertion portion are notched on the side substantially orthogonal to the moving direction of the card, and this direction is formed. The card can be installed from.

According to a sixth aspect of the present invention, in the electromagnetic relay according to the first to fifth aspects, the distal end portion of the armature is provided with a detachment preventing portion for preventing the armature from detaching from the armature inserting portion of the card. ing.

In the electromagnetic relay according to a seventh aspect of the present invention, in the structure of the sixth aspect, the separation prevention portion has a substantially L-shape bent in a direction substantially orthogonal to the extending direction of the armature and away from the card. I am supposed to.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. Since the basic configuration of the present embodiment is the same as that described in the related art, parts having substantially the same basic function are designated by the same reference numerals, and common parts will be described in detail. Description is omitted.

FIG. 1 and FIG. 2 are views showing a main part of an embodiment of an electromagnetic relay according to the present invention, and FIG.
2 (b), (c), (d), and (e) are front cross-sectional views, top cross-sectional views, left-side cross-sectional views, right-side cross-sectional views, and enlarged views near the tip of the armature, respectively. (A) and (b)
Are a top view and a front view near the tip of the card,
FIGS. 3C, 3D, and 3E are a top view, a front view, and a right side view, respectively, in the vicinity of the tip of the movable spring.

This electromagnetic relay includes an armature 7, a card 8,
The movable spring 9 has a characteristic structure.

The armature 7 is provided with a detachment preventing portion 7c at the tip portion 7b for preventing the armature 7 from being detached from the armature inserting portion 8c of the card 8. The separation preventing portion 7c is a substantially L-shaped member that is bent in a direction substantially orthogonal to the extending direction of the armature 7 and away from the card 8, and this portion is inserted into the armature inserting portion 8c.

In the card 8, the bobbin rib insertion hole 8a and the armature insertion portion 8c are notched on the side substantially orthogonal to the moving direction of the card 8, and as will be described later, the card 8 from this direction.
To be able to wear. Further, the card 8 is movable by providing a flat pressing portion 8f having a predetermined area on a bent portion 8e at the tip of the card, which is formed by bending the tip portion 8d into a substantially L shape in a direction substantially orthogonal to the moving direction of the card 8. Spring tip 9b
I try to give a pressing force to. In addition, card 8
Is provided with a step portion 8g having a surface substantially parallel to a card position restricting portion 9c, which will be described later, on the pressing portion 8f.

The movable spring 9 is attached to the tip 9b of the movable spring.
A card position restricting portion 9c formed by bending in a substantially L shape is provided in a direction substantially orthogonal to the extending direction of the movable spring 9 and in the direction in which the card 8 exists. Thus, the pressing portion 8f
When applying a pressing force to the tip end portion 9b of the movable spring, the card position restricting portion 9c is in a direction substantially orthogonal to the moving direction of the card 8 and the tip end portion 8d of the card 8 moves away from the tip end portion 9b of the movable spring. The movement of the card 8 in the direction substantially orthogonal to this direction, that is, in the direction perpendicular to the paper surface of FIG. 1A is restricted.

Therefore, this electromagnetic relay is used in the card 8
A flat pressing portion 8f having a predetermined area for applying a pressing force to the tip portion 9b of the movable spring is provided at the tip portion 8d of the movable spring, and the tip portion 9b of the movable spring is in a direction substantially orthogonal to the moving direction of the card 8. The front end 8d of the card 8 is the front end 9 of the movable spring.
Since the card position restricting portion 9c that restricts the movement of the card 8 in the direction away from b is provided, the friction between the card 8 and the movable spring 9 during operation is suppressed, and the generation of friction powder is suppressed. The reliability can be improved.

Next, the process of assembling the above electromagnetic relay will be described with reference to FIG.

First, in FIG. 2A, the armature 7 is fixed to the return spring 14 from the front side of the paper surface, and as shown in FIG. 2B, the electromagnet 3 is excited to move the armature 7 to the electromagnet 3. The other end 3b is sucked. Next, while maintaining this state, the card 8 is inserted from the front side of the paper with the notches of the bobbin rib insertion hole 8a and the armature insertion portion 8c facing the back side of the paper, and as shown in FIG. Put on.

Thus, in this electromagnetic relay, since the card 8 can be mounted from the direction perpendicular to the paper surface of FIG. 7, it can be easily manufactured and the manufacturing process can be easily automated.

Although the embodiment of the electromagnetic relay has been described above, the armature 7, the card 8 and the movable spring 9 can be modified in various ways, for example, the shapes shown in FIGS. Good.

The electromagnetic relay shown in FIG. 4 is different from the electromagnetic relay according to the above-described embodiment in the configurations of the card 8 and the movable spring 9. It should be noted that (a) and (b) are top and front views near the tip of the card, and (c), (d), and (e) are top views near the tip of the movable spring. The figure, the front view, and the right side view are shown.

The card 8 has a bent portion 8e at the end of the card,
A protrusion 8h formed substantially parallel to the pressing portion 8f is provided. The movable spring 9 is provided with a concave portion 9d in which the projection 8h is fitted, at the tip 9b of the movable spring. Thus, when the pressing portion 8f applies a pressing force to the tip portion 9b of the movable spring,
The protrusion 8h contacts the recess 9d.

According to this structure, when the card 8 moves, the card position restricting portion 9c is in a direction substantially orthogonal to the moving direction of the card 8 and the tip 8d of the card 8 moves from the tip 9b of the movable spring. Since the position of the card 8 is regulated in the separating direction, and the projection 8h at the tip of the card and the recess 9d at the tip of the movable spring regulate the position in the opposite direction to the position regulation direction, the card 8
The position regulation of the front end portion 8d becomes more reliable.

The electromagnetic relay shown in FIG. 5 differs from the electromagnetic relay according to the above-described embodiment in the configurations of the card 8 and the movable spring 9. It should be noted that (a) and (b) are top and front views near the tip of the card, and (c), (d), and (e) are top views near the tip of the movable spring. The figure, the front view, and the right side view are shown.

The card 8 has a flat pressing portion 8f having a predetermined area on a bent portion 8e at the tip of the card, which is formed by bending the leading end portion 8d into a substantially L shape in a direction substantially orthogonal to the moving direction of the card 8.
Is provided to apply a pressing force to the tip portion 9b of the movable spring. The movable spring 9 is attached to the tip 9b of the movable spring 9 in a direction substantially orthogonal to the extending direction of the movable spring 9 and in the card 8.
The card position restricting portion 9c formed by bending in a substantially L-shape is provided in the direction in which exists. According to this structure, since the card 8 and the movable spring 9 have a simple shape, they can be manufactured more easily.

The electromagnetic relay shown in FIG. 6 differs from that according to the above-described embodiment in the structure of the armature 5.
It should be noted that (a), (b), (c), (d), and (e) in the same figure are a front sectional view, a top sectional view, a left side sectional view, a right side sectional view, and a contact portion, respectively. It shows an enlarged view of the vicinity of the tip of the pole.

The armature 7 has a distal end portion 7b and a separation prevention portion 7c.
Is provided so that the armature insertion portion 8c of the card 8 can be mounted. According to this configuration, the armature 7
Since the detachment prevention portion 7c is provided in the armature 7, it becomes difficult for the armature 7 to detach from the armature insertion portion 8c of the card 8 when the armature 7 rotates.

[0034]

In the electromagnetic relay of the invention according to claim 1, the card is provided with a flat pressing portion having a predetermined area for applying a pressing force to the tip of the movable spring, and the movable spring is , A card position restricting portion for restricting the movement of the card in the direction substantially orthogonal to the moving direction of the card and in the direction in which the front end of the card moves away from the front end of the movable spring is provided at the end of the card. The friction between the card and the movable spring can be suppressed, the generation of friction powder can be suppressed, and the reliability can be improved.

According to a second aspect of the present invention, in the electromagnetic relay according to the first aspect, the pressing portion is provided at the bent portion where the tip of the card is bent in a direction substantially orthogonal to the moving direction of the card. Therefore, when the tip of the card is bent, the pressing portion can be formed, and the pressing portion can be easily manufactured.

According to a third aspect of the present invention, in the electromagnetic relay of the second aspect, the bent portion has a protrusion formed substantially parallel to the pressing portion, and the tip of the movable spring has the protrusion. Since there is a recess into which the part fits, and the pressing part of the card applies a pressing force to the tip of the movable spring, the projection contacts the recess, so that the position of the tip of the card is more restricted. It will be certain.

According to a fourth aspect of the present invention, in the electromagnetic relay according to the second or third aspect, when the pressing portion applies a pressing force to the tip of the movable spring, the card position restricting portion causes the card moving direction to move. A step portion having a surface substantially parallel to the card position restricting portion that restricts the movement of the card in a direction substantially orthogonal to the direction in which the distal end portion of the card separates from the distal end portion of the movable spring and a direction substantially orthogonal to this direction. Since the card is provided with, the position regulation of the tip portion of the card becomes more reliable.

The electromagnetic relay according to a fifth aspect of the present invention is the electromagnetic relay according to the first to fourth aspects, in which the bobbin rib insertion hole and the armature insertion portion are notched on a side substantially orthogonal to the moving direction of the card, and from this direction. Since the card can be mounted, it can be easily manufactured, and the manufacturing process can be easily automated.

The electromagnetic relay according to a sixth aspect of the present invention is the electromagnetic relay according to any of the first to fifth aspects, wherein the tip end portion of the armature is provided with a detachment preventing portion that prevents the armature from detaching from the armature insert portion of the card. Therefore, when the armature rotates, it becomes difficult for the armature to separate from the armature insert portion of the card.

According to a seventh aspect of the present invention, in the electromagnetic relay according to the sixth aspect, the separation preventing portion has a substantially L-shape bent in a direction substantially orthogonal to the extending direction of the armature and away from the card. Therefore, the separation preventing portion can be easily manufactured.

[Brief description of drawings]

1A and 1B show a main part of an embodiment of an electromagnetic relay according to the present invention, in which FIG. 1A is a front sectional view, FIG.
(C) is a left side sectional view, (d) is a right side sectional view, (e)
FIG. 4 is an enlarged view of the vicinity of the tip of the armature.

FIG. 2 is a view showing the main part of the above, where (a) and (b) are a top view and a front view near the tip of the card, respectively, (c),
(D) and (e) are a top view, a front view, and a right side view, respectively, near the tip of the movable spring.

FIG. 3 is a diagram showing a process of assembling the electromagnetic relay of the above.

FIG. 4 shows a main part of another embodiment of the above, wherein (a) and (b) are a top view and a front view of the vicinity of the tip of the card, respectively (c), (d), and (e). 10] is a top view, a front view, and a right side view, respectively, near the tip of the movable spring.

FIG. 5 shows a main part of still another embodiment of the same,
(A) and (b) are a top view and a front view, respectively, near the tip of the card, and (c), (d), and (e) are a top view, a front view, and the like, respectively, near the tip of the movable spring. It is a right side view.

FIG. 6 shows a main part of still another embodiment of the same,
(A) is a front sectional view, (b) is a top sectional view, (c) is a left side sectional view, (d) is a right side sectional view, and (e) is an enlarged view of the vicinity of the tip of the armature.

7A and 7B show a conventional electromagnetic relay, in which FIG. 7A is a front view with a case cut out, FIG. 7B is a plan view, FIG. 7C is a left side view, and FIG.

FIG. 8 is an exploded perspective view of the above electromagnetic relay without a case.

FIG. 9 is a perspective view showing a case of the electromagnetic relay and an inside of the case.

FIG. 10 is a perspective view showing the electromagnetic relay of the above.

[Explanation of symbols]

1 case 2 body 3 electromagnet 3a One end of electromagnet 3b The other end of the electromagnet 4 York 4a One side of yoke 4b The other side of the yoke 5 electromagnet 5a One end of electromagnet 5b The other end of the electromagnet 6 coil bobbins 6a Bobbin rib 7 Armature 7a Base end of armature 7b Tip of armature 7c Removal prevention part 8 cards 8a Bobbin rib insertion hole 8b card base end 8c Armature insertion part 8d card tip 8e Bent part of the card tip 8f pressing part 8g step 8h protrusion 9 Movable spring 9a movable contact 9b Tip of movable spring 9c Card position restriction unit 9d recess 10a, 10b fixed contact 11a, 11b coil terminals 12 movable contact terminals 13a, 13b Fixed contact terminal 14 Return spring

Claims (7)

[Claims] 1. A case having a predetermined space inside, a body housed and fixed in the case, a generally L-shaped yoke, one end of which is magnetically coupled to one side of the yoke, and the other end of which is An electromagnet having a yoke fixed to the body, which is composed of an iron core extending to the vicinity of the other side of the yoke and a coil wound around a coil bobbin having a predetermined bobbin rib surrounding the iron core,
The armature is rotatably attached to the other side of the yoke and is supported by a return spring in a direction biased away from the other end of the iron core and is supported by an electromagnet and driven by an electromagnet. The card has a bobbin rib insertion hole to be guided and has a movable contact and a card in which a distal end portion of an armature is inserted into an armature insertion portion provided at a proximal end portion, and the movable contact point is provided. Is a movable spring that moves by receiving pressure from the tip of the card, a fixed contact that makes contact with and separates from the movable contact, a coil terminal that electrically connects both ends of the coil, and a movable contact and a fixed contact. A movable contact terminal and a fixed contact terminal to be connected, which is an electromagnetic relay in which the movable contact performs contact and separation operation with the fixed contact when a predetermined voltage is applied to the coil terminal, wherein the card is
The tip of the movable spring is provided with a flat pressing portion having a predetermined area for applying a pressing force to the tip of the movable spring.
A card position restricting portion that restricts the movement of the card in the direction substantially orthogonal to the moving direction of the card and in the direction in which the front end of the card moves away from the front end of the movable spring is provided at the front end thereof. Electromagnetic relay. 2. The electromagnetic relay according to claim 1, wherein the pressing portion is provided at a bent portion in which a tip portion of the card is bent in a direction substantially orthogonal to a moving direction of the card. 3. The bent portion has a protrusion formed substantially parallel to the pressing portion, and the tip end of the movable spring has a recess into which the protrusion is fitted so that the pressing portion of the card is movable. The electromagnetic relay according to claim 2, wherein the protrusion contacts the recess when a pressing force is applied to the tip of the spring. 4. The pressing portion applies a pressing force to the tip of the movable spring, the card position restricting portion is in a direction substantially orthogonal to the moving direction of the card, and the tip of the card is the tip of the movable spring. The electromagnetic relay according to claim 2 or 3, further comprising a step portion having a surface substantially parallel to a card position restricting portion that restricts movement of the card in a direction away from the portion and a direction substantially orthogonal to this direction. 5. The bobbin rib insertion hole and the armature insertion portion are notched on a side substantially orthogonal to the moving direction of the card so that the card can be mounted from this side. The electromagnetic relay described in Crab. 6. The electromagnetic relay according to claim 1, wherein the distal end portion of the armature is provided with a detachment preventing portion that prevents the armature from detaching from the armature inserting portion of the card. 7. The electromagnetic relay according to claim 6, wherein the separation preventing portion is a substantially L-shaped member that is bent in a direction substantially orthogonal to the extending direction of the armature and away from the card.