JPH08235991A - Electromagnetic relay - Google Patents

Abstract

PURPOSE: To regulate the moving amount of an armature and simply, surely enhance shock resistance by forming a recess loosely engaging with a projection formed in the armature in a housing. CONSTITUTION: A contact spring 4 comprises a movable spring 41 in which a movable contact 41a is formed and a hinge spring 42. In the armature 3, square projections 3b, 3b are arranged in the direction along a flat surface on both sides of a supported part 3a supported rotatively at the edge of a yoke 2 with the hinge spring 42. In a base 5 of a housing and in one corner of a case 6, square recess 5a, 6a larger than the cross section of the projection 3b are formed, and the projection 3b is loosely engaged. When shock stronger than hinge supporting force of the the hinge spring 42 is applied to the armature 3, the moving amount of the armature 3 is regulated. By forming the projection 3b in the vicinity of the supported part 3a whose displacement is minimized, the moving amount is further decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay having an armature rotatably supported by a hinge.

[0002]

2. Description of the Related Art As this type of electromagnetic relay, there is one having a structure shown in FIG. This is an iron core (not shown)
A coil A wound around an iron core, a yoke B fixed to the iron core to form a magnetic path, and a base end portion (supported portion) C ₁ to the yoke B.
Armature that is hinged to be freely rotatable and is attracted to the iron core
C, a contact spring D provided with a contact portion (moving contact) D ₁ that is opened and closed in response to the armature C, and a housing (not shown) that accommodates each member.

More specifically, the contact spring D has a movable contact D ₁ for contacting with and separating from a fixed contact (not shown) at one end thereof and is fixed to one surface of the armature C, and the other end thereof. The side of the armature C is fixed to the yoke B together with the terminal member E, so that the other side of the base end C ₁ of the armature C is the yoke B.
It comes into contact with the end portion of and is rotatably supported by a hinge.

The terminal member E is provided with a contact spring D so as to face the rear end surface and one surface of the base end portion C ₁ of the armature C.
Both facing pieces E ₁ and E ₁ bent in an L shape are provided so as to avoid.

[0005]

In the above-mentioned conventional electromagnetic relay, the armature C is such that the base end (supported part) C ₁ is rotatable by the contact spring D to the end of the yoke B. Since it is only hinge-supported at the end, when an impact stronger than the supporting force is applied, the base end C ₁ will move from the end of the yoke B, but it is extended from the terminal member E. since facing piece E ₁ is opposed to the rear surface and one side of the base end portion C _1, when a shock is applied in a direction to move toward the proximal end C ₁ to confronting piece E _1, the proximal portion C ₁ The contact spring D _{1 is} prevented from being plastically deformed and the operating characteristics can be maintained because the contact piece D _{1 is} blocked by the facing piece E ₁ and the movement amount is restricted.

However, it is necessary for the facing piece E ₁ to face each other with a predetermined space on the rear end surface and one surface of the base end portion C ₁ of the armature C, by means of bending, which is a highly accurate means. Further, when an impact is applied in a direction to move the base end portion C ₁ toward a part other than the facing piece E ₁ , the contact spring D may be plastically deformed and the operating characteristics may not be maintained because the movement amount is not regulated. .

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 capable of improving shock resistance more simply and surely.

[0008]

In order to solve the above-mentioned problems, according to a first aspect of the invention, an iron core, a coil wound around the iron core, and a magnetic path fixed to the iron core are formed. A yoke, a armature having a supported portion rotatably hinged to the yoke to be attracted to the iron core, a contact spring having a contact portion opened and closed in response to the armature, In an electromagnetic relay including a housing for accommodating members, a protrusion is provided on the armature, and a recess that is loosely fitted and engaged with the protrusion is formed in the housing.

According to a second aspect of the present invention, in the first aspect, the projecting portion is provided in the vicinity of the supported portion of the armature that is hinge-supported.

According to a third aspect of the present invention, in the first aspect, the housing comprises a base and a case that are fitted to each other, and at least one of the base and the case is fitted in the fitting direction. The recess is formed on the inner surface orthogonal to each other.

According to a fourth aspect of the present invention, in the first aspect, the armature has a flat plate shape, and the projecting portion is provided so as to project along the flat surface of the flat plate. I am doing it.

[0012]

According to the first aspect of the present invention, the recess formed in the housing is loosely engaged with the protrusion provided on the armature, and the armature moves even when a shock is applied in all directions. The amount of movement is regulated by the four side surfaces of the recess and the inner surfaces of the housing itself, in which the protruding portions are loosely fitted and face each other in each direction.

Further, according to the second aspect of the present invention, in the armature, the supported portion is hinged to the yoke by the contact spring so as to be rotatable, and is attracted to the iron core. The support part becomes the most displaceable part, and the gap between the protrusion provided near the supported part and the recess that loosely fits and engages with the protrusion can be set to a smaller value. The amount of movement of the protruding portion is regulated in a smaller state.

According to the third aspect of the present invention, the base and the case which are fitted to each other are recesses provided on the inner surface orthogonal to the fitting direction when the base and the case are molded by the mold. The mold is also a simple shape that can be opened in the fitting direction.

According to the fourth aspect of the present invention, the armature can be provided with the protruding portion by simply punching a flat plate material.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This product is provided with an iron core (not shown), a coil 1, a yoke 2, an armature 3, a contact spring 4, a base 5, and a case 6.

The coil 1 is wound around a rod-shaped iron core through a coil frame 1a and is formed into an L-shaped yoke 2.
However, the other piece is fixed to the iron core so that the one piece is parallel to the iron core to form a magnetic path.

The armature 3 is formed by stamping a flat plate-shaped magnetic material, and is used for a hinge spring portion of a contact spring 4 described later.
On both sides of the supported portion (base end portion) 3a which is rotatably hinged to the end portion of the yoke 2 by 42, square protruding portions 3b, 3b are projected in the direction along the flat plane. It is set up.

The contact spring 4 is formed in a long shape from a thin conductive plate spring material such as a copper alloy. One side of the contact spring 4 in the longitudinal direction is a movable spring portion 41 and the other side is a hinge spring portion 42. The part is caulked and fixed to a protrusion provided on one side of the armature 3.

A movable contact (contact point) 41a is provided at one end of the movable spring portion 41, and the hinge spring portion 42 is formed by bending a bent portion 42a and a bent portion 42a formed from a portion fixed to the armature 3. An external lead-out terminal 42 is formed by bending the bent portion 42a in the opposite direction at a substantially right angle and protruding toward the one end in the width direction at the tip end side.
It consists of a terminal portion 42b having c.

The contact spring 4 is a hinge spring portion.
The terminal portion 42b of 42 is fixed to the outer surface of the yoke 3, and at this time, the hinge spring portion 42 is fixed by bending the bent portion 42a toward one surface of the armature 3 so that the hinge spring portion 42 is connected. Pole child
The supported portion (base end portion) 3a on the other surface side of 3 is brought into contact with the end portion of the yoke 2 so as to urge the hinged portion to rotate freely, and the movable contact 41a is fixed to a fixed contact (not shown). ) Also serves as an electric circuit for flowing a contact current flowing to the external lead terminal 42c.

The base 5 and the case 6 are fitted to each other,
As shown in FIG. 2, the housing is a housing that houses the electromagnetic relay main body including the above-mentioned members. Note that FIG.
In the figure, each terminal including the fixed contact with which the movable contact 41a comes in and out and the external lead-out terminal 42c led out from the base 5 is omitted.

Specifically, the base 5 is made of an insulating material,
It is formed into a square flat plate, and a square recess 5a larger than the cross-sectional shape of the square protrusion 3b of the armature 3 is formed in one corner of the inner surface thereof. And this base 5
When the above-mentioned electromagnetic relay main body is mounted in a sideways state with the axial direction of the coil 1 along the flat surface, as shown in FIG. It is loosely engaged with 3b.

The case 6 is formed of an insulating material into a box shape with a bottom, and a recess 6a having the same shape as the recess 5a of the base 5 is formed at one corner of the inner surface of the bottom. As shown in FIG. 2, in this case 6, when the opening edge is fitted to the base 5 so as to accommodate the above-mentioned electromagnetic relay main body, the recess 6a is provided with the recess 6a on the other protruding portion of the armature 3. It is loosely engaged with 3b.

Next, the operation will be described. When the coil 1 is excited, the armature 3 moves the supported part (base end) 3a to the hinge spring part.
The contact spring 4 fixed to the armature 3 is rotatably hinged to the end of the yoke 2 and is held by the iron core on the tip end side. Contact 41
When a contacts a fixed contact (not shown) and the coil 1 is de-energized, the armature 3 returns to its original state by the return spring force of the hinge spring portion 42.

In such an electromagnetic relay, the armature 3
The supported part (base end) 3a is the hinge spring part of the contact spring 4.
Since it is only hinged rotatably to the end of the yoke 2 by 42, the supported part 3a should move from the end of the yoke 2 when a stronger impact than its supporting force is applied. However, as described above, the recesses 5a and 6a formed in the base 5 and the case 6 that form the housing are the armatures.
Since the projections 3b, 3b provided on the base plate 3 are loosely engaged with each other, the armature 3 moves even if an impact is applied in all directions. With the four side surfaces of 6a and 6a and its inner surface, that is, the inner surface of the housing itself,
The amount of movement is restricted, so that the contact spring 4 is not plastically deformed and the operating characteristics can be maintained.

In the armature 3, the supported portion 3a has a contact spring.
The hinge spring portion 42 of the fourth embodiment rotatably hinges the end portion of the yoke 2 and attracts it to the iron core, so that the supported portion 3a is the least displaced portion in the operation process, and the supported portion 3a The gap between the projections 3b provided on both sides in the vicinity of the projections 3b and the recesses 5a and 6a that are loosely fitted and engaged with the projections 3b can be set to be smaller, and the movement of the projections 3b when an impact is applied. It can be regulated in a smaller amount.

Also, the base 5 and the case which are fitted to each other
6 has recesses 5a and 6a on the inner surface orthogonal to the fitting direction when it is molded by the mold, so the mold can also be made into a simple shape that can be opened in the fitting direction. it can.

Further, the armature 3 has the rectangular protrusions 3b, 3b.
Is formed by projecting along a flat plane, it can be formed by simply punching a flat magnetic material.

In this embodiment, the base 5 and the case
Each of the 6 is provided with a recess that is loosely engaged with the protrusion 3b, but if it is not possible due to the relationship with other members, the impact resistance will be slightly weakened, but the base 5 or case 6 May be provided on at least one of the above, and in that case, only one of the protrusions 3b is required.

Further, in this embodiment, the base 5 and the case
6, the recesses 5a, 6a are provided on the inner surface orthogonal to the fitting direction, but the protruding portion 3b of the armature 3 in the accommodated state is
Depending on the projecting direction, it is necessary to provide it on the inner surface along the fitting direction. In that case, the mold cannot be opened in the fitting direction, and the shape becomes complicated accordingly.

Further, in this embodiment, the protruding portion 3b is the supported portion.
It is provided near the (base end) 3a, but if it is not possible due to the relationship with other members, it may be on the tip side located farther than the supported part (base end) 3a. In that case, since the amount of displacement of the protrusion 3b in the operation process becomes large, it is necessary to increase the gap between the recessed portion and the recess that is loosely engaged, and the impact resistance becomes weaker accordingly.

Further, in the present embodiment, the armature 3 has a flat plate shape, and the projection 3b is projected along the flat surface of the flat plate, but the flat plate material cannot be punched. In addition, when the processing may be complicated, it is not limited thereto.

Further, in this embodiment, the housing is composed of two members of the base 5 and the case 6 which are fitted with each other, but it is needless to say that the housing is composed of one member in which the base 5 and the case 6 are integrally formed. Good.

[0035]

According to the first aspect of the present invention, in the armature, since the supported portion is hinged rotatably to the yoke by the contact spring, a shock stronger than the supporting force is applied. When this happens, the supported part will move from the yoke, but the recess formed in the housing will only fit loosely into the protruding part provided on the armature, and even if an impact is applied in all directions, In the armature, the moving protrusions are loosely fitted in each direction, so that the movement amount is restricted by the four side surfaces of the recess and the inner surfaces of the housing itself, so that the contact spring is not plastically deformed. The operating characteristics can be maintained and the impact resistance is improved.

According to a second aspect of the invention, the armature is
Since the supported part is hinged rotatably to the yoke by the contact spring and is attracted to the iron core, the supported part becomes the least displaced part in the operation process, and is provided in the vicinity of the supported part. The gap between the protrusion and the recess loosely engaged with the protrusion can be set smaller, and the amount of movement of the protrusion when an impact is applied is regulated in a smaller state. Impact resistance is further improved.

In addition to the effect of the first aspect, the base and the case which are fitted with each other have an inner surface orthogonal to the fitting direction when molded by a mold. If the recess is provided in the mold, the mold also has a simple shape that can be opened in the fitting direction.

In addition to the effect of the first aspect, the armature can be provided with the protruding portion by simply punching a plate-shaped material. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a front sectional view of the above.

FIG. 3 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Coil 2 Yoke 3 Armature 3a Supported part (base end) 3b Protruding part 4 Contact spring 41a Contact part (more specifically, movable contact) 5 Base 5a Recess 6 Case 6a Recess

Claims (4)

[Claims] 1. An iron core, a coil wound around the iron core, a yoke fixed to the iron core to form a magnetic path, and a supported iron supported by the yoke so that the supported portion is rotatably hinged. In an electromagnetic relay provided with an armature that is attracted to the core, a contact spring that has a contact portion that opens and closes in response to the armature, and a housing that accommodates each member, a protruding portion is provided on the armature. An electromagnetic relay, wherein a recess is provided in the housing and is provided so as to be loosely fitted and engaged with the protruding portion. 2. The electromagnetic relay according to claim 1, wherein the protruding portion is provided in the vicinity of the supported portion. 3. The housing comprises a base and a case that are fitted to each other, and the recess is formed on an inner surface orthogonal to the fitting direction of at least one of the base and the case. The electromagnetic relay according to claim 1. 4. The electromagnetic relay according to claim 1, wherein the armature has a flat plate shape, and the projecting portion is provided so as to project along a flat surface of the flat plate.