JPH0621157Y2 - Structure of electromagnetic relay - Google Patents

Description

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

[Background technology]

1 and 2 are perspective views of a yoke (3) 'and an armature (4) of a conventional electromagnetic relay, the yoke (3)' is formed in a substantially L shape, and the side thereof is shown. The center portion of the tip of the piece (3b) is cut out to form pivotal support pieces (9) 'on both sides thereof. The armature (4) is formed in a substantially T shape, and projecting pieces (12) projecting to both sides are formed on the upper part. In addition, at the upper end of the armature (4), a push-up piece (1
0) are integrally formed, and the armature (4) is formed in an L shape as a whole. The armature (4) is arranged in the notch hole of the yoke (3) ', and the projecting pieces (12) and (12) are attached to the pivot supporting pieces (9)'.
The armature (4) is placed on (9) 'and pivotally supported by the yoke (3)' so that it can swing. In the case of such a conventional example,
The protruding piece (12) of the armature (4) is placed on the pivot support piece (9) 'of the yoke (3)' in the height direction of the protruding piece (12), and the push-up piece (10) is a horizontal piece. Since it is located above (3b), there is a problem in that the height of the projecting piece (12) increases the overall height.

[Purpose of device]

The present invention has been provided in view of the above point, and an electromagnetic relay for the purpose of downsizing is provided by arranging the projecting piece or the pushing up piece of the armature below the horizontal piece of the yoke. It provides the structure.

[Disclosure of device]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 3 and 4 are perspective views of concrete yokes (3) and armatures (4), showing a substantially L-shaped yoke (3) consisting of a vertical piece (3a) and a horizontal piece (3b). 3)
Notch from both sides behind the tip of the horizontal piece (3b) of the
(9) is extended integrally. This pivot piece (9) is a lateral piece
It projects so as to incline downward as it goes forward from the tip of (3b), and has an inclined surface on its upper surface that inclines downward as it goes forward. The pivot piece (9) projects forward from the tip surface of the lateral piece (3b). The pivot piece (9) is the armature (4).
The protruding piece (12) is bent downward from the upper surface of the lateral piece (3b). Furthermore, a slit (11) is formed by cutting out in the center of the horizontal piece (3b) in a direction orthogonal to the plane of the vertical piece (3a),
The slit (11) has an opening on the front surface and the rear surface reaching the vertical piece (3a). Therefore, slit the push-up piece (10) of the armature (4).
The armature (4) is swingably supported by the yoke (3) by placing the projecting piece (12) on the pivot support piece (9) while positioning it inside (11). become. The armature (4) rotates as shown by the arrow in Fig. 3, but even if the push-up piece (10) rotates upward, the push-up piece (10) projects from the upper surface of the horizontal piece (3b). To prevent this, the position of the pivot piece (9) is lowered. In this way, the hinge structure of the short armature (4) and the yoke (3) can be realized.

FIG. 5 shows an electromagnetic relay using the yoke (3) and the armature (4) described above. In the figure, (1) is a coil wound around a coil bobbin, and (2) is a rod-shaped iron core fitted and inserted in the coil bobbin. One end of the iron core (2) is a vertical piece (3a) of the yoke (3)
When the coil (1) is attached to the core and the coil (1) is energized, the iron core (2) and yoke
(3), magnetic path is formed in armature (4), armature (4) is iron core
It will be adsorbed on the adsorption surface (5) of (2). (14) is a coil terminal. A contact spring (6) is provided on the upper part of the armature (4) so that the tip of the contact spring (6) contacts the upper surface of the push-up piece (10) and the tip of the contact spring (6) contacts. Movable contacts (8) (8) are fixed on the top and bottom. Fixed contacts (7) and (7) are arranged above and below the movable contact (8). (1
5) is a fixed terminal plate connected to the fixed contact (7)
Its tip projects from the lower surface of (17). (18) is armature
A return spring for return of (4), and (16) is a case covered by the body (17). Incidentally, (6a) is a common terminal integrally formed with the contact spring (6), and (25) is a caulking projection.

FIGS. 6 and 7 show an embodiment of a method of press-fitting the fixed terminal plate (15) into the body (17), which has a T-shape parallel to the surface from the end of the fixed terminal plate (15). The press-fitting piece (19) is integrally formed, and the upper and lower parts of the press-fitting piece (19) are press-fitting portions (19a) (19a) for press-fitting into the body (17). In addition, the fixed terminal board (1
A dowel (20) is projected on the surface of (5), and this dowel (20) is press-fitted into the body (17). Fig. 7 shows the fixed terminal plate (1
5) shows a state in which the body (17) of the molded body is press-fitted, and D shown in FIG. 7 (c) indicates a press-fitting margin, and the fixed terminal plate (1
5) is press-fitted into the press-fitting recess (22) of the body (17), the upper and lower press-fitting parts (19a) of the press-fitting piece (19) are press-fitted into the upper and lower surfaces of the recess (21), and the dowel (20) ) Is pressed against the inner wall surface of the press fitting recess (22). In this way, by the press-fitting part (19a) of the press-fitting piece (19) and the dowel (20), the body of the upper and lower, left and right fixed terminal boards (15)
It can be securely press-fitted into (17).

[Effect of device]

As described above, according to the present invention, in the electromagnetic relay, the pivotal support pieces located below the upper surface of the horizontal piece from both sides behind the horizontal piece of the yoke and below the upper surface of the horizontal piece are integrally formed. Each of them is extended, and a slit with front and rear faces opened is formed in the substantially central part of the horizontal piece in the direction orthogonal to the surface of the vertical piece of the yoke, and the upper part of the armature is made into a substantially T-shape to both sides. Protrusions that project and are placed on the pivotal support piece are formed respectively, and a push-up piece for driving the contact spring, which is located in the slit below the upper surface of the horizontal piece, is integrally formed from the upper portion of the armature, and the armature is connected. Since it is pivotally supported on the iron, the armature protrusion is placed on the pivot piece located below the upper surface of the yoke horizontal piece, and the armature push-up piece is Position it in the slit formed on the horizontal piece,
By positioning the push-up piece below the upper surface of the horizontal piece, the dimension in the height direction is determined by the height direction of the vertical piece of the yoke, and the height is made shorter by the height of the protruding piece of the conventional armature. Therefore, it has the advantage that it can be made short when it is upright and narrow when it is laid down, and can be made smaller as a whole.

[Brief description of drawings]

1 and 2 are perspective views of a conventional example, FIG. 3 is an exploded perspective view of an embodiment of the present invention, FIG. 4 is a perspective view of the yoke above, and FIGS. 5 (a) to 5 (e). Is a plan view of the electromagnetic relay, a front sectional view, a side sectional view, a side sectional view and a bottom view, and FIG. 6 is an exploded perspective view showing a press-fitting method of the fixed terminal plate in the same, FIG. 7 (a) (b) (c) is a vertical sectional view, a horizontal sectional view, and an explanatory view of the above. (1) is a coil, (2) is an iron core, (3) is a yoke, (4) is an armature,
(5) is a suction surface, (6) is a contact spring, (7) is a fixed contact, (8) is a movable contact, (9) is a pivotal support piece, (10) is a push-up piece, (11) is a slit, ( 12) shows a protrusion.

Claims (1)

[Scope of utility model registration request] Claims: 1. An iron core wound with a coil, a yoke having a substantially L-shape, which is composed of a vertical piece and a horizontal piece, the vertical piece being fixed to the iron core and forming a magnetic path with the iron core, and a yoke. The armature is pivotally supported so that the tip of the armature is attracted to the attraction surface of the iron core by exciting the coil with the tip of the armature facing the attraction surface of the iron core. In the electromagnetic relay in which the contacts are opened and closed through the contact springs provided opposite to the armature, the electromagnetic relay is located on both sides behind the tip of the horizontal piece of the yoke and below the upper surface of the horizontal piece, and The pivotal support pieces located forward of the tip end surface of the piece are integrally extended, respectively, and a slit having front and rear surfaces opened is formed in a substantially central portion of the horizontal piece in a direction orthogonal to the surface of the vertical piece of the yoke. The upper part of the armature is formed into a substantially T shape, and the projecting pieces that project on both sides and are placed on the pivotal supporting piece are formed respectively, and are located in the slit below the upper surface of the lateral piece. Structure of the electromagnetic relay and the contact spring a push-up piece for driving integrally formed from the top of the armature, characterized by comprising pivotally supported swingably yoke and armature.