JPS6136341B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes an armature holding spring that is attached to a yoke and presses an angled armature supported on the blade of the yoke with its support. , this armature retaining spring rests with its free end on the outer ridge of the armature, is held in its center by a mounting screw, and is hung on a yoke at its end opposite the armature. Regarding electromagnetic relays.

In known relays having such an armature support, a leaf spring configured in the form of a claw engages in a recess in the edge of the armature. This leaf spring must be manufactured with great precision since the spacing from the point where it hangs on the yoke to when it engages the armature cannot be changed. In another known relay (DE 2218493), a leaf spring with a flat cross section rests on the armature, which is also fixed to the yoke by rivets. Its longitudinal position cannot be adjusted. That is, in any case, the dimensions from the attachment point of the leaf spring to the edge of the yoke must already be precisely determined when the individual parts are manufactured. Manufacturing errors are more detrimental as the armature pressing force and therefore the stiffness of the spring are selected to be large, taking into account the external forces expected on the armature support.

An object of the present invention is to enable an armature holding spring in an electromagnetic relay of the type mentioned at the beginning to hold the armature without any gaps and under a desired pressing force without requiring particularly high manufacturing precision of the parts. It is necessary to configure it as follows.

The purpose of this is, according to the invention, to hold the armature retaining spring in a longitudinally positionable manner at the mounting screw by means of an elongated hole, and to connect the end of the armature retaining spring opposite the armature. This is achieved by elastically applying one or more spring tongues in the longitudinal direction of the iron protrusions or depressions.

By constructing the armature retaining spring according to the invention, the armature retaining spring can be made of any stiffness in order to exert the necessary pressing force at one end that presses on the armature, and at the other end. The elastically supported spring tabs can be positioned in the longitudinal direction of the spring to compensate for manufacturing tolerances. Compensation for this manufacturing error takes place automatically when fixing the spring with screws. This is because the relative position of the elongated hole and the screw can be adjusted during the assembly process of this spring. By suitably selecting its cross-section, the spring tab can remain much more elastic than, for example, its end that contacts the armature.

The compensation of manufacturing errors according to the invention is already sufficient with a single, for example arcuate, spring tongue. However, in a particularly advantageous embodiment of the invention, the armature retaining spring has two spring tongues bent on either side of the spring end approximately at right angles to its longitudinal direction. The spring tabs can be hung on the yoke at the window, in the gutter, or on the warts of the yoke.

The invention will be explained in more detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows an electromagnetic coil including a coil 1, a yoke angle 2, and a yoke plate 3 located on an extension of the yoke angle and connected to the yoke angle via an intermediate member 4 and a permanent magnet 5. A known electromagnetic device for a relay is shown. An angled armature 7 is supported on the blade 6 of the yoke, which armature is guided by outwardly curved guide teeth 8 into a central hole 9 in the yoke plate.
being guided inside. Lines of the yoke end face 10 which are not visible in the sectional view are shown in broken lines.

Armature retaining spring 11 for attaching armature 7
is used. This retaining spring is attached to the yoke plate 3 by means of a mounting screw 12 at its central portion 11a. With its substantially S-curved rigid pressing portion 11b, the holding spring presses against the teeth 8 of the armature and holds the armature 7 in its bearing. At the opposite end of the retaining spring are two spring tongues 11c.
These tongues are elastic due to their small cross-sectional area and abut against the corners 13 of the yoke plate 3.

FIG. 2 shows the armature retaining spring 11 in an enlarged plan view. This figure clearly shows the elastic spring tabs 11c which are bent approximately at right angles on both sides, the central part 11a for attaching the retaining spring to the yoke plate, and the pressure end 11b. An elongated hole 11d is provided in the central portion 11a for passing the mounting screw, and the relative position of the elongated hole and the screw 12 allows the armature holding spring 11 to be displaced in its longitudinal direction.

The process of attaching an armature and an armature retaining spring to the electromagnetic device of FIG. 1 is shown in FIGS. 3 through 6. As shown in FIGS. 3 and 4, the armature holding spring 11 is first placed on the yoke plate 3 and held by screws 12. As shown in FIGS. Spring tongue piece 11
The pressing portion 11 of the armature holding spring due to the biasing force of c
First, b is located deeper than the bearing ridge 6 of the yoke plate. Next, when the armature 7 is inserted as shown in FIG. 5, the pressing portion 11b rests on the guide tooth 8, and the armature holding spring 11 is inclined with respect to the yoke plate 3. During screw tightening, the rigid pressure part 11b is pulled upwards, and the spring tongues 11c are spread out and create a biasing force between the pressure part 11b and the armature guide tooth 8. The elongated hole 11d of the armature retaining spring allows a relative displacement of the armature retaining spring with respect to the screw 12, so that undesirable play of the armature bearing is automatically eliminated during assembly.

7 and 8 show an assembly process using a slightly deformed armature retaining spring.
This armature retaining spring 21 has a bent portion 21e that comes into contact with the teeth 8 of the armature and generates an additional biasing force when the mounting screw 12 is tightened. In this way very large armature pressures can be obtained.

The spring tongue of the armature retaining spring can have a structure suitable for various embodiments of the invention. Therefore, outlines of some other structures are shown in Figures 9 to 13.
As shown in the figure.

9 and 10, the armature retaining spring 31 is shown attached to the yoke 33 in the manner described above at the central portion 31a. The spring tongue piece 31c is bent at substantially right angles on both sides and is hung on the wart-like protrusion 33a of the yoke 33.

In FIGS. 11 and 12, the spring tongue piece 41c
The armature holding spring 41 is shown hanging on the window 43a of the yoke 43. There is another one in Figure 13.
As a modification, an armature retaining spring 51 is shown in which spring tongues 51c are respectively hung in the side grooves 53a of the yoke 53.

[Brief explanation of the drawing]

FIG. 1 is a side view of an electromagnet device for a relay according to the present invention, FIG. 2 is an enlarged plan view of an armature holding spring used in the device shown in FIG. 1, and FIGS. Explanatory diagram of the assembly process of the electromagnet device, No. 7
Figures 9 and 8 are explanatory diagrams of the assembly process when using a modified armature holding spring, and Figures 9 to 13 are
The figures are diagrams showing various structures and ways of hanging the armature holding spring. 1...Coil, 2...Yoke angle, 3,2
3, 33, 43, 53...Yoke, 4...Intermediate member, 5...Permanent magnet, 6...Yoke blade, 7...
Angled armature, 8...guide teeth, 9...recessed portion,
10...Yoke end face, 11, 21, 31, 41, 5
1... Armature holding spring, 11a... Intermediate portion, 1
1b, 21b, 31b, 41b...pressing portion, 1
1c, 21c, 31c, 41c, 51c... Spring, tongue piece 11d... Long hole, 12... Mounting screw, 1
3... Ridge portion as a recess of the yoke, 21e... Bent portion, 33a... Warty projection as a convex portion of the yoke, 43a... Window as a recess of the yoke, 53a...
…Gutters as recesses in yokes.

Claims (1)

[Scope of Claims] 1. An armature holding spring attached to a yoke that presses an angled armature supported on a blade part of the yoke with its supporting part, and this armature holding spring In an electromagnetic relay whose free end rests on the outer edge of the armature and is held in its center by a mounting screw, and whose end opposite the armature is hung on a yoke, the armature retaining spring is one or more springs, which are held by mounting screws so that they can be positioned in the longitudinal direction through elongated holes, and whose end opposite the armature of the armature retaining spring hangs over a convex or concave portion of the yoke; An electromagnetic relay equipped with an armature holding spring, characterized in that the armature holding spring is elastically applied in the longitudinal direction by a tongue piece. 2. The electromagnetic relay according to claim 1, characterized in that the armature holding spring has two spring tongues bent on both sides of the spring end at substantially right angles to the longitudinal direction of the armature holding spring. An electromagnetic relay equipped with an armature retaining spring. 3. An electromagnetic relay according to claim 2, characterized in that the pressing end of the armature holding spring is more rigid than the spring tongue piece. 4. The electromagnetic relay according to any one of claims 1 to 3, wherein the pressing end of the armature holding spring has a bent portion that generates an additional biasing force. Electromagnetic relay with spring. 5. The electromagnetic relay according to any one of claims 1 to 4, which is equipped with an armature holding spring, characterized in that a spring tongue piece is hung on a terminal ridge of the yoke. relay. 6. An armature holding spring in the electromagnetic relay according to any one of claims 1 to 4, characterized in that the spring tongue of the armature spring is hung on a window or side groove of a yoke. Electromagnetic relay with. 7. The electromagnetic relay according to any one of claims 1 to 4, comprising an armature holding spring characterized in that a spring tongue piece is hung on a wart-like protrusion of a yoke. Electromagnetic relay. 8. The electromagnetic relay according to any one of claims 1 to 7, comprising an armature holding spring characterized in that the armature holding spring has a spring tongue piece formed in a single arc shape. electromagnetic relay.