JP3858355B2 - Electromagnetic relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic relay in which a contact portion is driven to open and close in a driving direction by an armature.
[0002]
[Prior art]
As a conventional example of this type of electromagnetic relay, there is a configuration shown in FIGS. This is formed into a substantially L-shape by a body A, a substantially L-shaped yoke B having one piece coupled to one end of an iron core around which a coil B1 is wound, and a bent portion C1. The armature C in which the piece C2 is attracted and released to the other end of the iron core, and the distal end D2 extending from the fixed base end D1 is connected to the bent portion C1 of the armature C and the other end of the yoke B. A hinge spring D that is rotatably supported at the end of the piece B2 and a contact portion in which a movable contact that contacts and separates from the fixed contact is fixed to the movable contact spring.
[0003]
As another conventional example, there is a configuration shown in FIGS. In another conventional example, functions different from those of the conventional example will be described, and members having substantially the same functions as those of the conventional example are denoted by the same reference numerals and description thereof is omitted. In this device, the hinge spring D is not provided, and the contact portion A1 that contacts the bent portion C1 of the armature C is provided in the body A, and the armature C is rotated to the end of the other piece B2 of the yoke B. Support freely.
[0004]
[Problems to be solved by the invention]
In the electromagnetic relays of the above-described conventional example and another conventional example, the driving force of the armature C can be transmitted to the contact portion, and the load current can be opened and closed by opening and closing the contact portion.
[0005]
However, in the conventional example, when a strong impact is applied in a state where the tip D2 of the hinge spring D supports the armature C on the yoke B, the armature C is displaced and the hinge spring D is deformed, and the armature C is deformed. In some cases, the supporting force for supporting the pole C on the yoke B is reduced.
[0006]
In another conventional example, although the impact resistance is good, the gap dimension between the contact portion A1 provided in the body A and the yoke B, that is, the gap for disposing the armature C is provided. Dimension management is difficult. That is, when the mounted printed circuit board is thermally deformed, the body A is deformed and the gap dimension is changed, so that the armature C may not be stably and freely supported at the end of the other piece B2 of the yoke B. there were.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic relay that can improve impact resistance without deformation of the hinge spring even when a strong impact is applied. .
[0008]
[Means for Solving the Problems]
In order to solve the above-described problem, the first aspect includes a body, a substantially L-shaped yoke in which one piece is coupled to one end of an iron core wound with a coil, and a bent portion. An armature that is bent into a substantially L shape and one piece is attracted and released to the other end of the iron core, and a tip that extends from the fixed base end serves as a yoke for the bent portion of the armature A hinge spring that is pivotally supported on the other end portion of the first electrode, and a contact portion that is fixed to the movable contact spring. In the relay, the body is provided with a contact portion that can contact the bent portion of the armature with a predetermined gap between the bent portion, and the armature is orthogonal to the driving direction. The body is mounted by being inserted in the insertion direction, and the body has a tip of the hinge spring toward the insertion side. The abutting portions are respectively disposed on the opposite sides of the insertion side, and the hinge spring has the base end portion fixed to the other piece of the yoke, and the distal end portion from the base end portion to the insertion side, and the Each of the armatures is bent in two stages in the driving direction and disposed on the insertion side, and the armature is provided with a notch portion that crosses the tip portion on the other piece, and the guide piece guides the armature. Is provided at the tip of the hinge spring, and the armature is inserted in the insertion direction while being guided by the guide piece .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0013]
Reference numeral 1 denotes a body, which has a bottom portion 11 formed in a substantially rectangular parallelepiped shape by an insulating resin. A contact portion 12 is integrally formed and protrudes from the bottom portion 11 on the side in the width direction. A protruding wall 13 having a groove 13a is similarly projected from the bottom portion 11.
[0014]
An iron core 2 is formed of a magnetic material in a rod shape, has one end portion 21 and the other end portion 22, the other end portion 22 is formed in a bowl shape, and is inserted into a shaft hole of a coil frame described later. The
[0015]
Reference numeral 3 denotes a coil, which is a copper wire coated with an insulator, wound around the axial hole of the coil frame, that is, surrounding the iron core 2, and the terminal thereof is connected to the coil terminal 31.
[0016]
4 is a yoke, which is formed of a magnetic material in the shape of a long plate, has one piece 41 and the other piece 42, is bent into a substantially L shape, and one piece 41 is one end 21 of the iron core 2. The other piece 42 is juxtaposed along the axial hole of the coil frame.
[0017]
Reference numeral 5 denotes an armature, which is formed in a long plate shape with a magnetic material, and has one piece 51 and another piece 53 bent from the one piece 51 at a bent portion 52 into an approximately L shape at an obtuse angle. Then, the one piece 51 is sucked and released to the other end portion 22 of the iron core 2, and the other piece 53 opens and closes the contact portion 7 described later in the driving direction. Further, the other piece 53 is provided with a cutout portion 53a cut out from one side portion, and is formed into a substantially U-shaped side surface.
Reference numeral 6 denotes a hinge spring, which is formed into a plate shape by a copper alloy having elasticity, and has a base end portion 61 and a tip end portion 62 that extends from the base end portion 61 and is bent. The portion 61 is fixed at the center of the other piece 42 of the yoke 4, and the tip 62 supports the armature 5 at the bent portion 52 at the end of the other piece 42 of the yoke 4 so as to be rotatable. Further, a guide piece 63 that guides the armature 5 is projected from the distal end portion 62. This will be described in detail later.
[0018]
Reference numeral 7 denotes a contact portion, which includes a movable contact spring 71 and a fixed terminal plate 72. The movable contact spring 71 is formed in a long plate shape from a copper alloy having elasticity, and a movable contact made of a silver alloy at one end. 71a is fixed and the other end is a common terminal 71b. The fixed terminal plate 72 is formed in a long plate shape using a conductive material of copper or copper alloy, and fixes a fixed contact 72a made of a silver alloy at one end so as to face the movable contact 71a, and the other end is It is a normally open fixed terminal 72b, a so-called NO terminal. Then, the movable contact 71a contacts and is separated from the fixed contact 72a.
[0019]
Reference numeral 8 denotes a card, which is formed in a plate shape by an insulating resin, has a piece 81 and another piece 82 orthogonal to the piece 81, and a contact piece 82 a protrudes from the other piece 82. Is inserted into the notch groove 13a of the body 1 and is slidably held. Then, the one piece 81 comes into contact with the other piece 53 of the armature 5 and the contact piece 82a comes into contact with the movable contact spring 71 to drive the contact portion 7 to open and close in the driving direction.
[0020]
Here, a mounting method for mounting the armature 5 on the body 1 will be described with reference to FIG. First, the armature 5 is inserted in the insertion direction orthogonal to the driving direction. Here, the hinge spring 6 has a distal end portion 62 bent from the proximal end portion 61 to the insertion side and in the drive direction in two steps, and is disposed on the insertion side. It is each arrange | positioned to the side, ie, the opposite side of the insertion side.
[0021]
Therefore, the armature 5 is not obstructed by the contact portion 12 and the notch 53a is provided in the other piece 53 and crosses the distal end portion 62 of the hinge spring 6 in the driving direction. Without being obstructed, the other piece 53 is inserted in a state of being guided by the guide piece 63 protruding from the distal end portion 62. The hinge spring 6 has a tip 62 that supports the bent portion 52 of the armature 5 at the end of the other piece 42 of the yoke 4 so as to be rotatable on the insertion side.
[0022]
In the state where the armature 5 is supported by the yoke 4 as described above, the body 1 has a predetermined gap δ1 formed between the contact portion 12 and the bent portion 52 of the armature 5 as shown in FIG. Thus, the contact portion 12 that can contact the bent portion 52 is provided on the opposite side of the insertion side. Therefore, when a strong impact is applied, the armature 5 is displaced by a predetermined gap δ1 and the bent portion 52 is brought into contact with the contact portion 12. Therefore, the tip 62 of the hinge spring 6 is displaced within the elastic range and deformed. There is nothing to do.
[0023]
The operation of this will be described. When a DC voltage is applied to the coil terminal 31, the coil 3 wound around the iron core 2 is excited, and the iron core 2 and a yoke in which one piece 41 is caulked to one end portion 21 of the iron core 2. 4 and the armature 5 rotatably supported at the end of the other piece 42 of the yoke 4 form a magnetic path. As a result, one piece 51 of the armature 5 is attracted to the other end portion 22 of the iron core 2 to generate a driving force, and the driving force is transmitted to the movable contact spring 71 via the card 8 to open and close the contact portion 7. . Then, the movable contact 71a comes into contact with the fixed contact 72a, the common terminal 71b and the normally open fixed terminal 72b are closed, and a current loaded between both terminals is energized.
[0024]
Next, when the DC voltage is removed from the coil terminal 31, the piece 51 of the armature 5 is released from the other end 22 of the iron core 2, and the movable contact 71a is separated from the fixed contact 72a, and the common terminal 71b. The normally open fixed terminal 72b is opened.
[0025]
In the electromagnetic relay of one embodiment, as described above, the contact portion 12 that can contact the bent portion 52 of the armature 5 is provided in the body 1, and between the bent portion 52. Since the predetermined gap δ1 is formed, the distal end portion 62 of the hinge spring 6 normally supports the armature 5 on the end portion of the other piece 42 of the yoke 4 so that it can rotate freely and is subjected to a strong impact. Since the armature 5 is displaced by a predetermined gap δ1 and the bent portion 52 is in contact with the contact portion 12, the hinge spring 6 is not displaced and deformed within the elastic range, and the impact resistance can be improved. 6 can be reduced to achieve miniaturization.
[0026]
If the armature 5 is inserted in the insertion direction orthogonal to the driving direction, the tip 62 of the hinge spring 6 is on the insertion side, and the contact portion 12 of the body 1 is on the opposite side of the insertion side. Since they are respectively arranged, the armature 5 can be easily mounted on the body 1 by being inserted without being obstructed by the contact portion 12.
[0027]
Further, the base end portion 61 of the hinge spring 6 is fixed to the other piece 42 of the yoke 4 so that the front end portion 62 is bent from the base end portion 61 in the driving direction, and a notch that crosses the front end portion 62. Since the portion 53a is provided on the other piece 53 of the armature 5, when the armature 5 is inserted in the insertion direction, the distal end portion 62 of the hinge spring 6 crosses the notch 53a in the driving direction, and the armature 5 Can be inserted into the body 1 easily without being obstructed by the hinge spring 6.
[0028]
Further, since the guide piece 63 for guiding the armature 5 is provided at the distal end portion 62 of the hinge spring 6, the armature 5 is inserted in the insertion direction while being guided by the guide piece 63, and can be mounted more easily. At the same time, deformation of the tip 62 of the hinge spring 6 can be prevented.
[0029]
【The invention's effect】
According to the first aspect of the present invention, since the contact portion that can contact the bent portion of the armature is provided in the body and a predetermined gap is formed between the contact portion and the bent portion, the tip of the hinge spring is normally used. The armature supports the armature stably and freely on the other end of the yoke, and when a strong impact is applied, the armature is displaced by a predetermined gap and the bent portion abuts against the abutting portion. The hinge spring is not displaced and deformed within the elastic range, so that the impact resistance can be improved, and the hinge spring can be reduced in size to achieve miniaturization.
[0030]
According to the first aspect of the present invention, in addition to the above effect, if the armature is inserted in the insertion direction orthogonal to the driving direction, the tip of the hinge spring is brought into contact with the body toward the insertion side. Since the portions are arranged on the opposite sides of the insertion side, the armature can be inserted without being obstructed by the contact portion and can be easily mounted on the body.
[0031]
In addition to the above-mentioned effect, the base end of the hinge spring is fixed to the other piece of the yoke, and the distal end is bent in the driving direction from the proximal end. Since the notch that crosses the part is provided on the other piece of the armature, when the armature is inserted in the insertion direction, the tip of the hinge spring crosses the notch in the drive direction, and the armature is hinged. It can be inserted into the body easily without being obstructed by the spring.
[0032]
In addition to the above-mentioned effect, the guide according to claim 1 is provided with a guide piece for guiding the armature at the tip of the hinge spring, so that the armature is inserted in the insertion direction while being guided by the guide piece. Thus, it can be mounted more easily, and deformation of the hinge spring tip can be prevented.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a partial sectional side view of the above.
FIG. 3 is a perspective view showing a state in which the above armature is mounted on a body.
FIG. 4 is a partial side sectional view showing a state in which the above-described armature is inserted into the body.
FIG. 5 is a partial front view showing a conventional example.
FIG. 6 is a partial perspective view showing a state in which the above armature is mounted on the body.
FIG. 7 is a partial front view showing another conventional example.
FIG. 8 is a partial perspective view showing a state in which the above armature is mounted on the body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 12 Contact part (delta) 1 Predetermined space | gap 2 Iron core 21 One end part 22 Other end part 3 Coil 4 yoke 41 One piece 42 Other piece 5 Armature 51 One piece 52 Bending part 53 Other piece 53a Notch part 6 Hinge spring 61 Base end portion 62 Tip portion 63 Guide piece 7 Contact portion 71 Movable contact spring 71a Movable contact 72a Fixed contact

Claims (1)

A body, a substantially L-shaped yoke in which one piece is coupled to one end of an iron core around which a coil is wound, and a bent portion formed into a substantially L-shaped one piece is the other end of the iron core An armature that is attracted and released to the arm, a hinge spring that supports the bent portion of the armature on the other end of the yoke, with a tip extending from the fixed base end, and a fixed contact In an electromagnetic relay comprising a contact portion fixed to a movable contact spring, and a contact portion that is opened and closed in a driving direction by an armature.
The body is provided with a predetermined gap between the contact portion that can contact the bent portion of the armature and the bent portion ,
The armature is mounted by being inserted in an insertion direction orthogonal to the drive direction, and the body has a tip of the hinge spring on the insertion side and the contact portion on the opposite side of the insertion side. Respectively, and
The hinge spring has a proximal end fixed to the other piece of the yoke, and the distal end is bent from the proximal end to the insertion side and in two stages in the driving direction, and arranged to the insertion side. The armature is provided with a notch that crosses the tip, and a guide piece that guides the armature is provided at the tip of the hinge spring. An electromagnetic relay, wherein the electromagnetic relay is inserted in the insertion direction while being guided by the guide piece .

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