JPH01315284A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To facilitate external wirings by wiring a relay coil to the contact of a relay on a board. CONSTITUTION:Coils 1A, 1B and contacts 2A, 2B of normal/reverse switching relay of a motor are provided on a board, and contained in a relay case 3. When a normal/reverse changeover switch 17 is shifted to its normal side, the coil 1A is energized to switch the contact 2A, and a DC motor 14 is rotated normally. When the switch 17 is shifted to its reverse side, the coil 1B is energized to switch the contact 2B, the motor 14 is rotated reversely. Thus, the structure is simplified.

Description

[Detailed description of the invention] Industrial applications This invention relates to electromagnetic relays.

Background Art and Problems to be Solved by the Invention In an electromagnetic relay, a relay coil and contacts are built into a case, and a relay terminal is provided in the case. For example, when using this electromagnetic relay as a relay for forward and reverse rotation of a DC motor, use two electromagnetic relays with switching contacts, and install a relay terminal in the case between the switching contacts of these electromagnetic relays. Since the wires are connected to each other between them, this wire connection becomes complicated, and since two electromagnetic relays are provided, space for this is required.

SUMMARY OF THE INVENTION An object of the present invention is to connect the electromagnetic relays to each other on the substrate by wiring the relay coil and the relay contacts on the substrate, thereby facilitating external wiring.

Means for Solving the Problems This invention provides a relay case (3) in which an electromagnetic relay having a relay coil (1) and a relay contact (2) is wired on a board.
The electromagnetic relay is configured such that the relay case (3) is provided with a relay terminal of the electromagnetic relay.

Functions and Effects of the Invention Electrical wiring is made to the relay terminals of the relay coil (1) and relay contact (2) of the relay case (3), and the relay coil (
When 1) is energized and energized, the relay contact (2) of the other electrically independent main circuit is activated. This relay coil (1) and relay contacts (2) are wired on the board.1 For example, when using two of these electromagnetic relays to switch the rotation of a DC motor between forward and reverse directions, these relay contacts ( Since the switching contacts (2) can be connected on the board, the number of relay terminals for wiring provided in the relay case (3) is reduced, external connections can be easily made, and two sets of relay terminals are required. Since the electromagnetic relay is housed inside the relay case (3), a compact configuration can be achieved.

Embodiment Note that the rotation indicates a relay for switching forward and reverse rotation of the motor, and a relay coil (IA) and a relay contact (2A), and a relay coil (IB) and a relay contact (2B) are provided on the board. ing.

The relay contacts (2A) and (2B) are switching contacts.

These a-contact sides are connected to each other on the board, and the relay side is provided with relay terminals (61+71, respectively).

The relay coil (IA) has a relay terminal (81 (91), and the relay coil (IB) has a relay terminal CI[l (I
B is provided for each.

The electromagnetic relay with these relay coils (IA) (IB) and relay contacts (2A) (2B) is housed in the relay case (3), and the relay terminals (4) + 5
1 +61 +71 (81 (91 (101 (IB) is provided in this relay case (3). The relay case (
3) has a mounting hole u7J at the top.

The e side of the operating power supply is connected to the relay terminal (4), and
Relay coil (LA) via limit switch (19)
Also, limit switch flFA is connected to the relay terminal (9) of
are connected to the relay terminals (1 (1) of the relay coil (IB) through the limit switch +IsI (
I[9 has a normally closed contact.

The e side of the operating power supply is connected to the relay terminal (5),
In addition, the relay terminal f8++I11 of the relay coil (IA) (IB) is connected via the manual forward/reverse switch (1).
are connected to each.

When the operating voltage is applied and the forward/reverse selector switch (f+7) is turned to the forward rotation side, the relay coil (IA) is energized and energized.
The relay contact (2A) is switched and the A contact side is closed, and current flows to the DC motor (141), causing it to rotate forward. When the forward/reverse selector switch (1) is turned to the reverse side, the relay coil (IB) is energized. The relay contact (2B) is switched and the a contact side is closed, and a current flows in the opposite direction to the DC motor f+41, causing it to rotate in the reverse direction.
An external load can be operated by forward and reverse rotation of 41.

Automatic forward/reverse control of the direct current motor 04 can be performed by connecting this manual forward/reverse changeover switch (instead of the power supply, this relay terminal +81CI11 is connected to the control device in a grounded manner).

Further, the forward and reverse rotation can be stopped at a predetermined position by the limit switch f19 (161).

Since the motor forward/reverse relay is housed in the relay case (3) in this way, the configuration is compact and external connections can be simplified.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an electric circuit diagram, FIG. 2 is an external view, and FIG. 3 is an enlarged bottom view thereof. In the figure, (1) is the relay coil, (2) is the relay contact, (3) is the relay case, (41 (5) (61 (71)
fi+ (91(l[0(ill indicates a relay terminal.

Claims (1)

[Claims] An electromagnetic relay having a relay coil (1) and a relay contact (2) is wired on a board and installed inside a relay case (3), and the relay case (3) is provided with a relay terminal of the electromagnetic relay. relay.