JPH0134270Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an electromagnetic relay, more specifically, it has a first terminal plate and a second terminal plate, and when the coil wound around the yoke is energized, the armature is attracted to the armature. This invention relates to an electromagnetic relay in which an interlocking movable contact plate contacts a first terminal plate, and when the coil is not energized, the armature returns and the movable contact plate contacts a second terminal plate.

Conventionally, in the case of a single-pole electromagnetic relay, a stopper plate 9 is provided as shown in FIG. 1, or a stopper plate 9 is provided as shown in FIG. 2, in order to restrict the return position when the movable contact plate 6 returns. Card 8 is also provided. In this way, there is a problem in that the number of parts increases in order to regulate the return position of the movable contact plate 6.

The present invention was developed in view of the above points, and its main purpose is to reduce the number of parts in a single-pole electromagnetic relay. The purpose is to eliminate the need for lead wires for connection with the terminal board.

Hereinafter, embodiments of the present invention will be described based on the drawings. The electromagnetic relay according to the present invention has a first terminal plate 1 and a second terminal plate 2, and when a coil 4 wound around a yoke 3 is energized, an armature 5 is attracted and interlocked with the armature 5. A relay in which the movable contact plate 6 contacts the first terminal plate 1 and when the coil 4 is not energized, the armature 5 returns and the movable contact plate 6 contacts the second terminal plate 2. One end is mechanically and electrically coupled to the yoke 3, the second terminal plate 2 is electrically coupled to the yoke 3 at a position different from the coupling position of the movable contact plate 6 to the yoke 3, and the second terminal plate An electric path is formed from 2 to the movable contact plate 6 through the yoke 3. As shown in FIGS. 3 and 4, a yoke 3 is placed on a base 10 made of an insulating material such as synthetic resin. The yoke 3 is formed into a shape in which an iron core 11 around which a coil 4 is wound is integrally coupled to a horizontal piece of a substantially L-shaped strip. A substantially L-shaped armature 5 is supported at the upper end of the vertical piece of the yoke 3 with the inner corner of the armature 5 in contact with the yoke 3. The armature 5 is bent at an angle greater than a right angle, and its horizontal pieces are movable between a position where it contacts the upper end of the iron core 11 and a position away from the iron core 11. A movable contact plate 6 is mounted on the upper part of the vertical piece of the yoke 3.
are mechanically and electrically connected by methods such as spot welding, riveting, or strangling. The movable contact plate 6 is formed by bending a band plate having spring properties, and is bent into a substantially L-shape above the part fixed to the yoke 3, so that the corner part of the armature 5 can be viewed from the outside. The holding armature 5 is prevented from coming off the yoke 3. At one end of the movable contact plate 6 below the fixed part of the yoke 3, there is a movable contact 1 on the side opposite to the yoke 3.
2 is provided. A first terminal plate 1 having a fixed contact 13 corresponding to the movable contact 12 is attached to a base 1.
A second terminal plate 2 is provided vertically through the base 10 and between the first terminal plate 1 and the yoke 3. The second terminal plate 2 is arranged substantially parallel to the first terminal plate 1,
Its upper end is bent and abuts against the lower part of the vertical piece of the yoke 3. A protrusion 14 is provided at the lower part of the vertical piece of the yoke, and this protrusion 14 penetrates into a through hole 15 formed at the upper end of the second terminal plate 2 to connect the yoke 3 and the second terminal plate 2 electrically. and mechanically coupled. As a result, an electric path is formed from the second terminal plate 2 through the yoke 3 to the movable contact plate 6. Incidentally, the vertical piece of the armature 5 is formed in a substantially U-shape and is open at the center, and the movable contact plate 6 is coupled to the yoke 3 at a position corresponding to this opening. However, the lower end of the vertical piece of the armature 5 is located between the lower part of the movable contact plate 6 and the yoke 3. Since the lower end of the movable contact plate 6 has a spring force in a direction toward the second terminal plate 2, this spring force pushes the lower end of the vertical piece of the armature 5 toward the yoke 3. , the horizontal piece of the armature 5 is separated from the upper end of the iron core 11. In this state, the movable contact plate 6
The lower end of the terminal contacts the second terminal plate 2 and becomes the initial state. When the coil 11 is energized, the horizontal piece of the armature 5 is attracted to the iron core 11, the movable contact plate 6 is moved at the lower end of the vertical piece of the armature 5 against the spring force, and the movable contact 12 at the lower end of the movable contact plate 6 is moved. and the fixed contact 13 of the first terminal plate 1 are brought into contact with each other.
In this state, the first terminal plate 1 and the second terminal plate 2 are electrically connected through the above-mentioned electric path passing through the yoke 3 and the movable contact plate 6. When the coil 4 is no longer energized, the movable contact plate 6 returns to its initial state due to its own spring force, and at the same time, the armature 5 also returns to its initial state due to the spring force of the movable contact plate 6. In the figure, reference numeral 16 indicates contact with the first terminal plate 1.

In the present invention, as described above, when the coil is energized, the movable contact plate contacts the first terminal plate, and when the coil is not energized, the movable contact plate contacts the second terminal plate,
The second terminal plate and the movable contact plate are connected to the yoke to form an electric path from the second terminal plate through the yoke to the movable contact plate. This has the advantage that there is no need for a stopper or card for holding the device at a predetermined return position, and the number of parts can be reduced. Further, one end of the movable contact plate is mechanically and electrically coupled to the yoke, the second terminal plate is electrically coupled to the yoke at a position different from the coupling position of the movable contact plate to the yoke, and the second terminal plate is electrically coupled to the yoke at a position different from the coupling position of the movable contact plate to the yoke. Since an electrical path is formed from the plate to the movable contact plate through the yoke, there is no need for a lead wire between the second terminal plate and the movable contact plate, eliminating accidents such as lead wire breakage and poor contact. has advantages.

[Brief explanation of drawings]

FIGS. 1 and 2 are partial sectional views showing a conventional example,
FIG. 3 is a sectional view showing one embodiment of the present invention, and FIG. 4 is a partially omitted perspective view of the same, in which 1 is a first terminal board, 2 is a second terminal board, 3 is a yoke, and 4 is a coil. ,
5 is an armature, and 6 is a movable contact plate.

Claims (1)

[Scope of utility model registration request] It has a first terminal plate and a second terminal plate, and when the coil wound around the yoke is energized, the armature is attracted and the movable contact plate interlocked with the armature comes into contact with the first terminal plate, and the coil is not energized. A relay in which the armature returns and the movable contact plate contacts the second terminal plate, one end of the movable contact plate is mechanically and electrically coupled to the yoke, and the second terminal plate is movable to the yoke. An electromagnetic relay that is electrically coupled to a yoke at a position different from the coupling position of the contact plate, and has an electric path formed from the second terminal plate through the yoke to the movable contact plate.