JPH1031948A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the number of part items and the number of assembling processes to improve the productivity by providing such a structure that an operation button directly drives an internal movable part. SOLUTION: This electromagnetic relay has an operation button 50 slidably mounted on the ceiling surface of a case 40 assembled to a base 10. When a voltage is applied to the coil 21 of an electromagnet 20 to excite it, the horizontal part of a movable iron piece 25 is attracted by the magnetic force generated in an iron core 23. Therefore, the movable iron piece 25 is rotated with the upper end part of a yoke 24 as fulcrum, and a card 26 mounted on the vertical end part of the movable iron piece 25 is horizontally moved to press a movable contact piece 33. The movable contact piece 33 is then rotated, and after its movable contact 33a is switched to a fixed contact 32a, the horizontal part of the movable iron piece 25 is attracted to the magnetic pole part 23a of the iron core 23. Since the movable contact piece 33 is returned to the original state by its own spring force when the application of voltage to the coil 21 is then released, the movable contact 33a is switched from the fixed contact 32a to 31a, and the movable iron piece 25 is returned to the original state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay,
The present invention relates to an electromagnetic relay having an operation function.

[0002]

2. Description of the Related Art A conventional electromagnetic relay having a lock function is disclosed in, for example, U.S. Pat. No. 4,220,937. That is, the push button protruding from the ceiling surface of the case is vertically movably supported, and a lock lever having a tapered surface is rotatably attached to the ceiling surface. And
In this electromagnetic relay, by rotating the lock lever, the push button is pressed down on the tapered surface, the lower end portion drives the internal movable part in the case, and the contacts are forcibly closed and locked. Was.

However, in order to forcibly close and lock the contacts, the above-described electromagnetic relay requires a separate push button and a lock lever, and requires a large number of parts. In addition, since the lock lever firmly fixes the push button, when an impact force is externally applied to the locked electromagnetic relay, the impact force is directly transmitted to the internal movable parts without being buffered. For this reason, a displacement occurs in the internal movable parts,
There was a risk that operating characteristics would change. Further, even when the push button is not locked by the lock lever, there is a problem that the push button, which can move up and down, comes into contact with the internal movable part due to an external impact force and may malfunction. Was.

[0004] In view of the above problems, an object of the present invention is to provide an electromagnetic relay which has a small number of parts, does not change operation characteristics, and can prevent malfunction.

[0005]

In order to achieve the above object, an electromagnetic relay according to the present invention includes an operation button with a lock function for directly driving an internal movable part from an operation hole provided in a case to activate the internal movable part. It is configured to be slidably attached to the case. Also, on the surface of the case,
Operation display means may be provided to be exposed when the operation button is slid to make the operation state. Further, the operation button may be slidably attached to an inclined surface formed in the case. An elastic claw that presses and drives the internal movable component from an operation hole of the case may be provided on an inward surface of the operation button.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described with reference to FIGS. The electromagnetic relay according to the present embodiment has an operation button 50 slidably attached to a ceiling surface of a case 40 assembled to the base 10.

The base 10 has an electromagnet section 20 mounted on one upper surface thereof, and a contact mechanism 30 disposed on the other side thereof.

In the electromagnet section 20, an iron core 23 having a substantially T-shaped cross section is inserted into a center hole of a spool 22 around which a coil 21 is wound. 23b is formed by caulking and fixing to a substantially L-shaped yoke 24.

A card 26 is attached to the lower end of a substantially rectangular movable iron piece 25 rotatably supported at the upper end of the yoke 24, and the horizontal tip of the card 26 is connected to a contact mechanism 30 to be described later. The movable contact piece 33 is engaged.

The contact mechanism 30 has a movable contact piece 33 erected between a pair of opposed fixed contact pieces 31 and 32 pressed into the base 10.
The movable contact 33a provided on the fixed contact pieces 31 and 32 alternately comes into contact with and separates from the fixed contacts 31a and 32a provided on the fixed contact pieces 31 and 32, respectively.

One side of the ceiling surface of the case 40 has an inclined surface 41.
The inclined surface 41 has a pair of ridges 42, 4
2 are provided in parallel, and the locking recess 43
a, 43b are provided and the ridges 42, 43 are provided.
An operation hole 44 is formed between 42. Further, a protrusion 45 is provided on an outer side surface of the case 40 so as to protrude laterally to secure an operation space for an operation button 50 described later.

The operation button 50 is provided with the ridges 42 and 4.
Protrusions 52, 52 which are alternately engaged with the engaging recesses 43a, 43b are provided on both side edges of a button body 51 having a planar shape which can slide between the two. Further, an elastic claw 53 is protruded from the lower surface of the button body 51.

Therefore, as shown in FIG. 1, the locking projection 52 of the operation button 50 is locked in the locking recess 43 a provided in the ridge 42 of the case 40, and a voltage is applied to the coil 21 of the electromagnet section 20. If not, the card 26 is urged rightward in FIG. 1B by the spring force of the movable contact piece 33 itself, and the movable contact 33a is fixed to the fixed contact 31a.
Is in contact with

When a voltage is applied to the coil 21 of the electromagnet section 20 to excite it, the horizontal portion of the movable iron piece 25 is attracted by the magnetic force generated in the iron core 23. Therefore, the movable iron piece 25 rotates about the upper end of the yoke 24 as a fulcrum, and the card 26 attached to the vertical end of the movable iron piece 25 moves in the horizontal direction, and the movable contact piece 33 is pressed. For this reason, the movable contact piece 33 rotates, and the movable contact 33a becomes the fixed contact 31.
After being separated from the fixed contact 32a and separated from the fixed contact 32a, the horizontal portion of the movable iron piece 25 is attracted to the magnetic pole portion 23a of the iron core 23.

Next, when the application of the voltage to the coil 21 is released, the magnetic force of the iron core 23 disappears, and the movable contact piece 33 returns to its original state by its own spring force.
Is switched from the fixed contact 32a to the fixed contact 31a, and the card 26 is pushed back in the opposite direction to that described above.
Returns to its original state.

Next, when the operation button 50 is slid diagonally downward, the elastic claw 53 is moved to the movable iron piece 25.
Is pressed down, and the locking projection 52 of the operation button 50 is locked in the locking recess 43b of the ridge 42 to lock the movable contact piece 33 from the fixed contact 31a to the fixed contact 32a. The contacts can be forcibly closed and locked.

When the operation button 50 is slid in the opposite direction to the above, and the locking projection 52 of the operation button 50 is locked in the locking recess 43a provided in the ridge 42 of the case 40, the movable contact piece 33 The card 26 is pushed back by the spring force, the movable iron piece 25 returns to the original state, and the movable contact 33a switches from the fixed contact 32a to the fixed contact 31a.

In the above-described embodiment, a case where the present invention is applied to a self-recovering type electromagnetic relay has been described. However, the present invention is not necessarily limited to this and may be applied to a self-holding type electromagnetic relay.

[0019]

As is apparent from the above description, according to the electromagnetic relay according to the first aspect of the present invention, since the operation button directly drives the internal movable part, the push button as in the conventional example becomes unnecessary. , The number of parts and assembly man-hours decrease,
Productivity is improved. Further, since the operation button itself according to the present invention has the lock function, the internal components are not erroneously operated unlike the conventional example, and the reliability is high. According to the second aspect, when the operation button is slid into the operation state, the operation display means is exposed, so that the operation state can be visually checked, which is convenient. According to the third aspect, since the operation buttons are arranged on the inclined surface, the dead space can be effectively utilized, and particularly when the inclined surface is provided on the ceiling surface, an electromagnetic relay having a low height can be obtained. . According to the fourth aspect, even when locked in the operating state, the elastic claw provided on the operation button reduces the impact force, and the impact force is not directly transmitted to the internal movable parts. For this reason, there is an effect that no displacement occurs in the internal components and the operation characteristics do not change.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention before an operation button of an electromagnetic relay is slid, and FIG. 1 (a) is a plan view and FIG. 1 (b) is a cross-sectional view.

FIGS. 2A and 2B show an embodiment after the operation button of the electromagnetic relay according to the present invention is slid, and FIG. 2A is a plan view and FIG.

[Explanation of symbols]

10 base, 20 electromagnet part, 24 yoke, 25
Movable iron piece, 26 card, 30 contact mechanism 31, 32
... fixed contact piece, 31a, 32a ... fixed contact, 33 ... movable contact piece, 33a ... movable contact, 40 ... case, 41 ... inclined surface, 42 ... ridge, 43a, 43b ... locking concave part, 44 ... operation hole, 50 operation buttons, 51 operation button body, 52
... locking projections, 53 ... elastic claws.

Claims (4)

[Claims] 1. An electromagnetic relay, wherein an operation button with a lock function for directly driving an internal movable part from an operation hole provided in a case to activate the internal movable part is slidably mounted on the case. 2. The electromagnetic relay according to claim 1, wherein operation display means is provided on a surface of the case, the operation display means being exposed when the operation button is slid into an operation state. 3. The electromagnetic relay according to claim 1, wherein the operation button is slidably attached to an inclined surface formed in the case. 4. The operation button according to claim 1, wherein an elastic claw is provided on an inward surface of the operation button to press and drive the internal movable part from an operation hole of the case. Electromagnetic relay according to the item.