JPH0640463B2 - Structure of electromagnetic relay - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of an electromagnetic relay.

[Background technology]

1 to 3 show a conventional example. FIG. 1 shows a sectional view of the whole, in which (1) is a coil, and this coil (1) is wound around a coil bobbin (8). (2) is an iron core fitted in the central cavity of the coil bobbin (8), one end surface of this iron core (2) is used as a suction surface (2a), and the other end is fixed. (3 ′)
Is a yoke that forms a magnetic path with the iron core (2) and also constitutes an outer shell, and this yoke (3 ') is formed in a substantially L shape from the vertical piece (3a) and the horizontal piece (3b). The vertical piece (3a) has a hole for fitting with the iron core (2). Reference numeral (4 ') is a substantially L-shaped armature, and the central portion of the armature (4') is pivotably supported by the end portion of the yoke (3 '). Also, a piece (4a) of the armature (4 ')
Is attracted to the suction surface (2a) of the iron core (2), so that the suction surface (2a)
And the other piece (4b) is arranged on the horizontal piece (3b) of the yoke (3 '). Reference numeral (5) is an elastic contact spring that is in contact with the upper surface of the armature (4 '), and the movable contact (7) is fixed to the upper and lower surfaces of its tip. (6) is a fixed contact facing the movable contact (7).

Then, when an electric current is applied to the coil (1), the adsorption surface of the iron core (2)
One piece (4a) of the armature (4 ') is attracted to (2a), and the contact spring (5)
Is driven upward to switch the contacts (6) and (7). In such a conventional example, as shown in FIG. 3, since the armature (4 ') and the other piece (4b) are superposed on the transverse piece (3b) of the yoke (3'), There is a problem that the height is limited by the thickness and the miniaturization is necessarily limited.

[Object of the Invention]

The present invention has been made in view of the above points, and provides the manufacture of an electromagnetic relay for the purpose of downsizing and high density.

[Disclosure of Invention]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 4 shows a perspective view of the whole, and FIG. 5 shows a perspective view of the yoke (3) and the armature (4). Other configurations are substantially the same as the conventional example. As shown in Fig. 5, a slit (9) is formed in the center of the lateral piece (3b) of the yoke (3) in the same direction as the longitudinal direction of the other piece (4b) of the armature (4) to form a recess. Is provided. That is, the width of this slit (9) is formed wider than the width of the other piece (4b) of the armature (4), and the other piece (4b) of the armature (4) is housed in this slit (9). However, even if the armature (4) is attracted and the other piece (4b) is driven upward, the armature (4) does not project above the upper surface of the lateral piece (3b) of the yoke (3). Further, the contact spring (5) is formed in a substantially Y shape and is provided opposite to the other piece (4b) side of the armature (4), and the end portion of the contact spring (5) is bent downward to be different from the conventional one. Similarly, the movable contact (7) is fixed. (12) is a fixed tack. (10) is a body made of insulating material for arranging the upper member.
1) is a terminal plate fixed to the fixed contact (6), (12) is a coil terminal, and (13) is a common terminal connected to the contact spring (5). Then, the armature (4) is not attracted to the iron core (2).
In the state shown in the figure, the other piece (4b) of the contact terminal (4)
Are arranged so as to sink into the slit (9). When one piece (4a) of the armature (4) is attracted to the iron core (2), the other piece (4b) is driven upward, while the other piece (4b) of the armature (4) is slit (9 ), It does not protrude from the upper surface of the horizontal piece (3b) of the yoke (3). FIG. 7 shows another embodiment of the yoke (3), in which a recessed groove (14) is formed in the center of the lateral piece (3b) of the yoke (3), and the other side of the armature (4) is formed. The piece (4b) is arranged to be stored.

FIG. 8 shows still another embodiment of the yoke (3), in which the yoke (3) shown in FIGS. 5 and 7 is used in combination. That is,
The U-shaped bridging piece (15) with a concave upper surface is integrally formed at the end of the yoke (3) to stabilize the slit (9) of the yoke (3), that is, both ends of the yoke (3) shown in FIG. It is a plan.

〔The invention's effect〕

As described above, in the electromagnetic relay according to the present invention, in the transverse piece of the yoke, the other piece of the armature is formed with the recess for accommodating and arranged in the longitudinal direction of the other piece. Compared with the conventional one in which the other piece of the armature is overlapped, the other piece of the armature is stored and arranged in the recess, so that the dimension in the height direction can be reduced by the thickness of the other side of the armature, As a whole, it has the effect of reducing the size and increasing the density.

[Brief description of drawings]

1 is a sectional view of a conventional example, FIG. 2 is a perspective view of the same, and FIG.
FIG. 4 is a side view of the same as above, FIG. 4 is a perspective view of an embodiment of the present invention, FIG. 5 is a perspective view of the yoke and armature of the same, FIG. 6 is a sectional view of the same, and FIG. FIG. 8 is a perspective view of another embodiment of the above yoke, and FIG. 8 is a perspective view of still another embodiment of the above yoke. (1) coil, (2) iron core, (2a) adsorption surface, (3) yoke, (3
a) Vertical piece, (3b) horizontal piece, (4) armature, (4a) one piece, (4b)
Is another piece, (5) is a contact spring, (6) is a fixed contact, and (7) is a movable contact.

Claims (1)

[Claims] Claims: 1. A substantially L-shaped yoke made of an iron core around which a coil is wound, a magnetic path is formed between the iron core and the magnetic core, and the vertical piece is fixed to the iron core. And a substantially L-shaped armature pivotally attached so that one piece of the armature is arranged to face the attraction surface of the iron core, and the other piece of the armature is arranged on the horizontal piece of the iron core. In the electromagnetic relay, one piece of the armature is attracted to the attracting surface of the iron core by exciting the coil, and the contact spring opposite to the armature is driven via the other piece to open and close the contact. A structure of an electromagnetic relay, characterized in that a lateral piece of the yoke is formed with a recess in which the other piece of the armature is housed and arranged in the longitudinal direction of the other piece.