JPH0736342U - Small relay - Google Patents

Abstract

(57) [Summary] [Purpose] To absorb the inrush current that is input to the small relay mounted on electronic equipment. [Structure] A base of a resistance piece 30 having electrical resistance and elasticity is connected to a fixed contact piece 24 of a small relay 20. Further, the contact 31 of the resistance piece 30 is arranged between the movable contact 25 and the fixed contact 26 so that the movable contact 25 can be connected to the resistance piece 3
The contact 31 of the resistance piece 30 and the fixed contact 26 are brought into contact with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small relay, and more particularly to a small relay that improves safety.

[0002]

[Prior art]

 A conventional small relay of this type will be described with reference to FIG. In the figure, 1 is a small relay, and a coil 3 is mounted on a base 2 of the small relay 1. On the side of the coil 3, a fixed contact piece 4 and a movable contact piece 5 are erected so as to face each other.

When the coil 3 is energized, the armature 6 is attracted by the core 7 to rotate, and the movable contact piece 5 is pressed via the operating piece 8. Therefore, the movable contact 9 of the movable contact piece 5 moves to contact the fixed contact 10 of the fixed contact piece 4, and the switch is turned on. Further, when the coil 3 is de-energized, the original state is restored, the movable contact 9 is separated from the fixed contact 10, and the switch is turned off.

[0004]

[Problems to be solved by the device]

 In the conventional small relay described above, an inrush current may flow when the main switch of an electronic device equipped with the small relay is turned on, and each contact may be damaged by the inrush current. In addition, in order to prevent the inrush current, there is a circuit in which a limiting resistor is provided.

However, providing the limiting resistance in the circuit increases the cost or energy loss, and at the same time, there is a problem that the reliability is poor. Therefore, there is a technical problem to be solved in order to prevent the damage of the small relay due to the inrush current of the electronic device and to improve the reliability of the small relay, and the present invention solves the problem. The purpose is to do.

[0006]

[Means for Solving the Problems]

 This invention was proposed in order to achieve the above-mentioned object.A coil is attached to the base of the main body, and a movable contact piece and a fixed contact piece are opposed to the side of the coil. In a small relay in which the movable contact of the movable contact moves by connecting to the fixed contact of the fixed contact by standing up and energizing the coil, an electric resistance is provided at the base of the fixed contact. And connecting the base of the resistive piece having elasticity and providing a contact on the resistive piece, the contact being disposed between the movable contact and the fixed contact, and the movable contact being the contact of the resistive piece. It provides a small relay that can be connected to a fixed contact via a.

[0007]

[Action]

 In this invention, the base of the resistance piece is connected to the base of the fixed contact piece of the small relay. Further, the contact provided on the resistance piece is disposed between the movable contact and the fixed contact. Therefore, when the coil of the small relay is energized, the movable contact piece moves to the fixed contact piece side by the rotating motion of the armature, and the movable contact point of the movable contact piece comes into contact with the contact point of the resistance piece, further pressing the contact piece. Then, it is connected to the fixed contact through the contact of the resistance piece.

Therefore, in the small relay, first, the movable contact and the contact of the resistance piece come into contact with each other, so that the fixed contact piece is connected to the movable contact through the resistance piece having an electric resistance. Thus, the inrush current generated when the main switch is turned on is absorbed by the resistance piece, and the inrush current does not directly enter the fixed contact, so that the movable contact piece and the fixed contact piece are not contacted. The mutual contacts of are not damaged.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In the figure, 20 is a small relay, and as shown in FIG. 1, a coil 22 is mounted on one side of a base 21 of the small relay 20. On the side of the coil 22, a movable contact piece 23 and a fixed contact piece 24 are erected so as to face each other. On the upper ends of the movable contact piece 23 and the fixed contact piece 24, a movable contact 25 and a fixed contact 26 are provided so as to face each other.

A dogleg-shaped armature 28 is rotatably supported on the upper end of the yoke 27 to which the coil 22 is fixed, and the armature 28 and the movable contact piece 23 are connected to each other. An operating piece 29 is provided between the two. When the coil 22 is energized, one end of the armature 28 is attracted to the core 32 of the coil 22, and the armature 28 rotates to move the movable contact piece 23 via the actuating piece 29. Is moved to the fixed contact piece 24 side so that the movable contact 25 can be connected to the fixed contact 26.

Further, a resistance piece 30 having electric resistance and elasticity is disposed between the movable contact piece 23 and the fixed contact piece 24. Thus, the resistance piece 30 is obliquely provided at the lower portion, and its base is fixedly connected to the lower portion of the fixed contact piece 24. Further, a contact point 31 is provided on the upper end portion of the resistance piece 30, the contact point 31 of the resistance piece 30 is disposed between the movable contact 25 and the fixed contact 26, and as described above, the movable contact 25. The contact point 31 of the resistance piece 30 comes into contact with the fixed contact 26 by the pressing force of, and thus the movable contact 25 is connected via the contact point 31 of the resistance piece 30.

As described above, since the movable contact 25 is connected to the fixed contact 26 via the contact 31 of the resistance piece 30, the movable contact piece 23 and the fixed contact piece 24 are connected via an electrical resistance. It will be. Therefore, the inrush current generated when the main switch of the electronic device (not shown) equipped with the small relay 20 is turned on is first absorbed by the resistance piece 30. After that, the movable contact 25 further moves while pressing the contact 31 of the resistance piece 30, and the contact 31 comes into contact with the fixed contact 26. That is, the movable contact 25 and the contact 31 of the resistance piece 30 and the contact 31 of the resistance piece 30 and the fixed contact 26 contact each other to connect the movable contact 25 to the fixed contact 26, and further cut off the current to the coil 22. As a result, the equal contacts are also separated from each other.

FIG. 2 shows another embodiment, in which the base portion of the resistance piece 30 a is fixedly connected to the lower portion of the fixed contact piece 24 via the resistance member 33. Further, the resistance piece 30a is made of the same material as the movable contact piece 23 and the fixed contact piece 24 having good conductivity, and the resistance member 33 has an electric resistance effect. Thus, the small relay 20a performs the same operation as the small relay 20 shown in FIG.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified version.

[0015]

[Effect of device]

 In this invention, as described in detail in the above-mentioned embodiment, the base of the resistance piece having elasticity and electric resistance is connected to the fixed contact piece. Further, the contact provided on the resistance piece is disposed between the movable contact and the fixed contact, and after the movable contact and the contact of the resistance piece are contacted, the movable contact presses the contact of the resistance piece to The contact of one side and the fixed contact are configured to come into contact with each other.

Therefore, since the movable contact piece and the fixed contact piece are electrically connected to each other through the resistance piece having the electric resistance, the inrush current generated when the main switch of the electronic device is turned on is The resistance piece absorbs it. Thus, the contact portion of the small relay can be prevented from being damaged, and it contributes to the improvement of performance and reliability, which is a very significant and practical idea.

[Brief description of drawings]

FIG. 1 is a side view of a small relay according to an embodiment of the present invention.

FIG. 2 is a side view of a small relay according to another embodiment of the present invention.

FIG. 3 is a side view of a conventional small relay.

[Explanation of symbols]

 20, 20a Small relay 21 Base 22 Coil 23 Moving contact piece 24 Fixed contact piece 25 Moving contact 26 Fixed contact 30, 30a Resistance piece 31 contact

Claims (1)

[Scope of utility model registration request] 1. A coil is mounted on a base of a main body, and a movable contact piece and a fixed contact piece are erected on the side of the coil so as to face each other, and the coil is energized to move the movable contact piece. In a small relay in which a movable contact moves to connect to a fixed contact of a fixed contact piece, a base portion of the fixed contact piece has an electric resistance, and a base portion of an elastic resistance piece is connected, The resistance piece is provided with a contact, the contact is arranged between the movable contact and the fixed contact, and the movable contact can be connected to the fixed contact through the contact of the resistance piece. A small relay that does.