JP2002367499A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay which does not produce wastage, in preparing a material for a hinge spring and without requiring a complicated die for manufacturing the hinge spring. SOLUTION: A moving iron piece 18 is rotatably supported via the hinge spring 20 formed of a linear spring material. A moving contact piece 16 is driven by the moving iron piece 18 rotated, based on the application of a voltage to a coil 12 and stop thereof.

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 a hinge spring that supports a movable iron piece.

[0002]

2. Description of the Related Art Hitherto, a hinge spring of an electromagnetic relay has been formed by stamping and bending a thin plate-like spring material with a press die.

[0003] However, when the hinge spring is formed of a thin plate-shaped spring material, not only is there wasteful material removal, but the shape of the press die required for press working is complicated, and an expensive die is required. There is a point.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an electromagnetic relay that does not waste material for a hinge spring and does not require a complicated press die for manufacturing the hinge spring.

[0005]

In order to achieve the above object, an electromagnetic relay according to the present invention rotatably supports a movable iron piece via a hinge spring and rotates based on excitation and demagnetization of an electromagnet section. In the electromagnetic relay in which the contact mechanism is driven by the movable iron piece, the hinge spring is formed of a linear spring material.

Therefore, according to the present invention, since the hinge spring is formed of a linear spring material, there is no waste in material removal as compared with the case where the hinge spring is formed from a thin plate spring material. Further, a press die having a complicated shape as in the conventional example is not required, and the production cost can be reduced.

[0007] In an embodiment of the present invention, the hinge spring may have a pair of elastic arms that are engaged with both end surfaces of the yoke and rotatably support the movable iron piece.
According to the present embodiment, since the pair of elastic arms of the hinge spring sandwich the both end surfaces of the yoke, mounting and dismounting are easy. For this reason, there is no need to caulk the hinge spring in advance on the yoke, and the yoke can be retrofitted to the base or the like. As a result, the spool can be integrally formed on the base, and the number of parts can be reduced.

In another embodiment of the present invention, an elastic tongue for rotatably supporting the movable iron piece is provided at the upper end of the yoke by a hinge spring being engaged with a concave portion formed on the upper surface of the movable iron piece. May be included. According to this embodiment, since the elastic tongue of the hinge spring is locked in the concave portion of the movable iron piece to regulate the position, the movable iron piece is less likely to fall off even when vibration or the like is applied, and the vibration resistance is improved. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electromagnetic relay according to the present invention will be described with reference to the accompanying drawings of FIGS. The first embodiment is a case where the present invention is applied to an electromagnetic relay in which a base and a spool are integrally formed as shown in FIGS.

That is, in the electromagnetic relay according to the present embodiment, the coil 12 is wound around the spool 11 integrally formed on the upper surface of the base 10. Then, the lead wire of the coil 12 is pressed into the base 10, and the coil terminal 13,
After being entangled with the upper end portion of the thirteen bent in the horizontal direction, the upper end portion is bent up and soldered. For this reason, the upper end of the coil terminal 13 does not hinder the assembling work when fitting a case (not shown) to the base 10.

Further, a yoke 14 having a substantially L-shaped cross section is inserted from below into a through hole provided at a substantially central portion of the base 10. On the other hand, an iron core 15 having a substantially T-shaped cross section is inserted into the center hole of the spool 11 from above, and the protruding lower end portion is caulked and fixed to the horizontal end portion of the yoke 14, while the protruding upper end portion is used as a magnetic pole portion 15a. is there.

A movable contact piece 16 and a fixed contact piece 17 are press-fitted and fixed from above into a pair of terminal holes provided on one side of the base 10, and the movable contact 16a is opposed to the fixed contact 17a so as to be able to contact and separate therefrom. .

Next, the bent movable iron piece 18 is positioned at the upper end of the yoke 14, and the elastic arms 21 and 21 of the hinge spring 20 are engaged with the locking grooves 14a and 14a formed on both end faces of the yoke 14. I do. Thereby, the position regulating elastic tongue 22 of the hinge spring 20 is pressed against the upper surface corner of the movable iron piece 18 to rotatably support the movable iron piece 18. For this reason, the horizontal end 18a of the movable iron piece 18
Is opposed to the magnetic pole portion 15a of the iron core 15 so as to be able to contact and separate therefrom, and its vertical lower end portion 18b is in contact with the movable contact piece 16.

Therefore, when no voltage is applied to the coil 12, the vertical lower end 18b of the movable iron piece 18 is pressed by the spring force of the movable contact piece 16, and the horizontal end 18a of the movable iron piece 18 is From the magnetic pole portion 15a.

When a voltage is applied to the coil 12 to excite it, the horizontal end 18a of the movable iron piece 18 is attracted to the magnetic pole portion 15a of the iron core 15, and the movable iron piece 18
6 rotates against the spring force. For this reason, the movable iron piece 18
The vertical lower end 18b presses the movable contact piece 16, and the movable contact 16a contacts the fixed contact 17a to close the electric circuit.

Further, when the application of the voltage to the coil 12 is stopped, the vertical lower end portion 18b of the movable iron piece 18 is pushed back by the spring force of the movable contact piece 16, and the movable contact 16a is separated from the fixed contact 17a to return to the original position. Returns to the state.

The second embodiment according to the present invention is substantially the same as the first embodiment, as shown in FIG. The difference is that the distal end of the elastic arm portion 21 of the hinge spring 20 has a large polygonal shape and protrudes.

According to the present embodiment, there is an advantage that the attachment and detachment of the hinge spring 20 is further facilitated.
Other configurations are the same as those of the above-described embodiment, and the description is omitted.

The third embodiment according to the present invention is substantially the same as the first embodiment, as shown in FIG. The different point is the shape of the elastic tongue 22 that comes into contact with the movable iron piece 18 among the shapes of the hinge spring 20. That is, an elastic tongue 22 is formed at the upper end of the hinge spring 20 so as to bend so that a part thereof falls down. On the other hand, a positioning recess 18 c with which the elastic tongue 22 of the hinge spring 20 is engaged is formed at a corner of the upper surface of the movable iron piece 18.

According to the present embodiment, the elastic tongue 22 of the hinge spring 20 not only presses against the movable iron piece 18 but also
It is engaged with the concave portion 18c. For this reason, even if vibration or impact force is applied from the outside, there is an advantage that the movable iron piece 18 does not easily fall off and the impact resistance is improved. Other configurations are the same as those of the above-described embodiment, and the description is omitted.

In the above-described embodiment, the case where the movable iron piece 18 is supported on the upper end of the yoke 14 via the hinge spring 20 has been described. However, the present invention is not limited to this, and is applied to the case where the movable iron piece is supported on the coil spool. Of course, it may be possible.

[0022]

According to the present invention, since the hinge spring is formed of a linear spring material, there is no waste in material removal as compared with the case where the hinge spring is formed of a thin plate spring material. Further, there is an effect that the production cost can be reduced without requiring a press die having a complicated shape as in the conventional example.

[Brief description of the drawings]

1 shows a first embodiment of an electromagnetic relay according to the present invention, FIG. 1A is an exploded perspective view, and FIG. 1B is an enlarged perspective view of a main part of FIG. 1A.

2 shows a perspective view of a first embodiment according to the present invention, FIG. 2A is a perspective view seen from the right side, and FIG. 2B is a perspective view seen from the left side.

3 shows a second embodiment of the electromagnetic relay according to the present invention, FIG. 3A is a perspective view seen from the right side, and FIG. 3B is a perspective view seen from the left side.

FIG. 4 shows a third embodiment of the electromagnetic relay according to the present invention, wherein FIG. 4A is a perspective view seen from the right side, and FIG. 4B is a perspective view seen from the left side.

[Explanation of symbols]

10 ... base, 11 ... spool, 12 ... coil, 13 ...
Coil terminal, 14: yoke, 15: iron core, 15a: magnetic pole part, 16: movable contact piece, 16a: movable contact, 17: fixed contact piece, 17a: fixed contact, 18: movable iron piece, 18a ...
Horizontal end, 18b Vertical lower end, 18c recess, 20
Hinge spring, 21: elastic arm, 22: elastic tongue.

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Koji Aboshi 801 Shidokoro Shiorikyo-ku, Shimogyo-ku, Kyoto, Japan

Claims (3)

[Claims] 1. An electromagnetic relay in which a movable iron piece is rotatably supported via a hinge spring and a contact mechanism is driven by the movable iron piece which is rotated based on excitation and demagnetization of an electromagnet section, wherein the hinge spring is linear. An electromagnetic relay formed of a spring material. 2. The electromagnetic relay according to claim 1, wherein the hinge spring has a pair of elastic arms that are engaged with both end surfaces of the yoke and rotatably support the movable iron piece. 3. An upper end of the yoke has an elastic tongue for rotatably supporting the movable iron piece at a top end of the yoke by locking the hinge spring into a concave portion formed on the upper surface of the movable iron piece. Item 3. The electromagnetic relay according to item 1 or 2.