JPS583572B2 - Denjike Denki - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnetic relay.

Conventionally, in this type of relay, the contact springs are driven by a lift-off contact mechanism using a card or a flexure contact mechanism, but in the flexure contact mechanism, the opening force depends only on the return force of the contact spring, so it is difficult to use a lift-off contact mechanism. The welding resistance was generally lower than that of the mechanism.

The present invention aims to provide an electromagnetic relay that uses a flexure contact mechanism and has high welding resistance and can maintain a constant contact gap.

The invention will now be explained with reference to the drawings.

In FIGS. 1 to 5, reference numeral 1 denotes a coil block, which is held by a support frame 2, and has a coil 5 wound around a U-shaped iron core 3 whose opposite ends protrude as magnetic pole pieces 4, 4.

Further, the outer ends of the magnetic pole pieces 4, 4 are provided so as to slightly bulge out from the end surface of the support frame 2, and engaging protrusions 6, 6 are provided on each side surface on both sides.

Reference numerals 7 and 7 denote coil lead wires, and a contact block is provided with a recess 9 in which the coil block 1 can be accommodated, and contact terminals 10, 10, 11, 11 are arranged in two rows facing each other on the upper surface.
Terminals 12 and 12 for connecting to the coil lead wire are planted on the upper surface of both sides in the longitudinal direction, and furthermore, the contact terminals 10, 10, 11, 11 and the coil terminal 12 are implanted on the lower surface of both sides. , 13 respectively connected to the pull-out terminals 13,
13, 14, 14 and 15, 15 are aligned and protruded in two rows.

The magnetic pole piece 4 is attached to the inner upper edge of the contact block in the longitudinal direction.
. , 17 are provided in parallel.

18, 18, 18a, i8a have their bases bent into an L-shape, and two of them are fixed inside the contact terminal 10 in the center,
The other two pieces are fixed outside the contact terminal 10 in the center 4
Movable contacts 19, 19, 19a,
19a is fixedly installed, the movable contacts 19 of the two contact springs 18 are provided so as to contact the contact terminals 11 at both ends from the outside, and the movable contacts 19a of the other two contact springs 18a are It is provided so as to contact the contact terminals 11 at both ends from the inside.

Reference numerals 20 and 20 indicate plate springs whose one ends are fixed to the contact terminals 10 and 10 together with the contact springs 18 and 1B, and 21 indicates notches 2 corresponding to the magnetic pole pieces 4 and 4 protruding from the coil block 1.
2.22 is formed on the bearing plate, and a shaft 23 is installed in the center.

24 is an amateur block having a shaft hole 25 in the center through which the shaft 23 is inserted, and windows 26, 26 sandwiching the shaft hole 25 to accommodate magnets 27 and 27.

Further, at both ends of the armature block 24, protruding pieces 28, 28 for engaging the magnetic pole pieces 4, 4 are extended in parallel, and protrude outward in a direction perpendicular to the longitudinal direction thereof, and are located on the outside. Cards 29, 29 capable of pressing the contact springs 18, 18 are provided symmetrically across the shaft hole 25.

Further, welding prevention cards 29a, 29a, which have notches 30, 30 for playing with the contact springs 18a, 18a located on the inside, are arranged symmetrically across the shaft hole 25 on the side opposite to the cards 29, 29. It is expanded to.

Reference numeral 31 designates a cover having a receiving portion 32 for the shaft 23 formed on the inner wall of its upper surface, and its lower edge is brought into contact with and fixed to the stepped portion 8a of the outer wall of the contact block 8.

Then, the outer ends of the magnetic pole pieces 4, 4 are fitted into the recesses 16, 16, and the engaging protrusions 6, 6 are engaged with the recesses 17, 17, and the coil block 1 is inserted into the recess 9 of the contact block. and contact springs 18, 18, 18a, 18a, bearing plate 2
1. The polarized relay of the present invention is equipped with a contact opening/closing member group consisting of an armature block d having welding prevention cards 29a, 29a for loosely fitting the contact springs 18a, 18a, and by covering the cover 31. can be assembled.

Therefore, the polarized relay opens four contacts by exciting the coil 5 and rotating the armature relay.

Alternatively, the armature block 24 is rotated in the opposite direction to close the four contacts.

In this case, the card 29.29 pushes the contact springs 18, 18 to open the contacts of the contact terminal 11 and the movable contact.

On the other hand, before the coil is excited, the contact spring 18a is pressed by one wall surface 30a of the notch 30 as shown in FIG. When energized, ie, the armature block 24 is rotated, the contact spring 18a is released and its own spring force causes the armature block 24 to rotate.
The movable contact 19a and the contact 11 move backward following the rotation of 4.
a is developed.

At this time, if the movable contact 19a and the contact 11a of the contact terminal are slightly welded together and cannot be restored by the spring force of the contact spring 18a, the other wall surface 30b of the notch 30 pushes the contact spring 18a, and the contact 19a and contact 11a are opened.

Incidentally, since a clearance g is provided between the other wall surface 30b and the contact spring 18a, the wall surface 30b does not act on the contact spring 18a except during welding.

The electromagnetic relay of the present invention configured as described above has remarkable effects such as improved adhesion resistance, the ability to keep the contact gap constant, and the ability to guarantee the withstand voltage between the contacts.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a polarized relay of the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a longitudinal sectional view thereof, and Fig. 4 is an A--
A cross-sectional view taken along line A, and FIG. 5 is a partially enlarged cross-sectional view. 1... Coil block, 2... Support frame, 3... Iron core, 4... Magnetic pole piece, 5...
...Coil, 6...Engagement protrusion, 7...
・・Coil lead wire, ・・・Contact block, 9・
...Recess, 10, 11...Contact terminal, 1
2... terminal, 13, 14, 15... drawer terminal, 16... recess, 17... recess for attendant, 18, 18a... ...Contact spring, 19,1
9a...Movable contact, 20...Plate spring,
21... Bearing plate, 22... Notch, 23
...Shaft, 24-...Amateur block, 25...1...Shaft hole, 26...Window, 27
...Magnet, 28... Protrusion, 29...
... Card, 29a ... Welding prevention card, 3
0...Notch, 31...Cover, 32.
...Ukebe.

Claims (1)

[Claims] 1. A contact opening/closing member group consisting of an armature block etc. rotatably supported on a bearing plate is mounted on a combination of a coil block and a contact block, and by exciting the coil of the coil block, the armature block In an electromagnetic relay that performs a contact switching operation by rotating a shaft, a shaft hole is bored in the center through which the shaft of the bearing plate is inserted, and projecting pieces are provided at both longitudinal ends to play with the magnetic pole pieces of the coil block. A relay characterized in that a welding prevention card for loosely fitting a contact spring that automatically returns when released is provided on the side surface of an armature block having an extended armature block, and a separating force is applied when the contacts of the contact spring are welded.