JPS6125161Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electromagnetic relay, and its purpose is to reduce the influence of the contact force between the movable spring and the fixed contact terminal even if the mounting position of the movable spring constituting the electrical switching section is misaligned. The goal is to create an electromagnetic relay that is electrically stable and has little to no noise.

FIG. 1 shows a conventional example of the present invention in which a movable spring is directly attached to a mounting terminal attached to a body of an electromagnetic relay.

In the figure, 1 is a container body, 2 is an iron core, 3 is a coil, 4 is a mounting terminal, a movable spring 5 is tied with an insulator 6 and attached to a movable iron piece 7, and the base end of the movable spring 5 is 5a is attached to the mounting terminal 4 by spot welding, for example.

A movable contact 5b is attached to the free end of the movable spring 5, and the movable contact 5b is extended between fixed contacts 8a' and 8b' of fixed contact terminals 8a and 8b attached to the device body 1 to function as an electrical switching section. do.

In such conventional electromagnetic relays, if the connection position between the base end 5a of the movable spring 5 and the mounting terminal 4 is misaligned, the stiffness of the spring increases or decreases and the contact force changes. That's true.

The present invention has been devised as a countermeasure against such problems, and its purpose is to improve the connection between the movable spring and the mounting terminal.

Hereinafter, an embodiment of the electromagnetic relay of the present invention will be described with reference to FIGS. 2 to 4, in which the same parts as in FIG. 1 showing the conventional example are given the same reference numerals. Figures 2 and 3 show one embodiment in which a set of mounting terminals 4a, 4b facing fixed contact terminals 8a, 8b is planted on a body 1 to which a coil 8 and an iron core 2 are attached. Meandering parts 9a, 9b that can swing vertically and horizontally are provided on the movable springs 5, 5 lying astride between the fixed contact terminals 8a, 8b and the mounting terminals 4a, 4b, and the ends of the meandering parts 9a, 9b are provided. are attached to the set of mounting terminals 4a, 4b, and the movable springs 5,
5. The meandering portions 9a and 9b are bound together with an insulator 10 and attached to the movable iron piece 7 which engages with the iron core 2 via the insulator 10.

The meandering portions 9a, 9b are connected to the mounting terminals 4a, 4b.
The horizontal direction can be adjusted by side pieces 11a and 11b that can be swung in the direction, and the vertical direction can be adjusted by side pieces 11b and 11b that can be swung in the direction of fixed contact terminals 8a and 8b, respectively. Side pieces 11a, 11
The stiffness of the spring is reduced by integrally connecting the springs.

Reference numeral 12 denotes a return spring, which is bound together with the movable spring 5 by an insulator 10; however, the return spring 12 may be attached, for example, between the movable iron piece 7 and the upper surface of the vessel body 1 to exert an elastic force. .

In the assembled state shown in FIG. 3, the side pieces 11a, 11a are artificially adjusted in the left-right direction as described above, thereby eliminating the left-right displacement of both the movable and fixed contacts.

Thus, the side pieces 11b, 11b hold the engaging portion a of the movable iron piece 7 and the iron core 2 in a state where the stiffness of the spring is made sufficiently small by the meandering formation,
The other end of the movable iron piece 7 is opened by a return spring 12 .

In such a state, the contact force between the movable contact 5b and one of the fixed contacts 8a' is mostly given by the spring force of the return spring 12, and when the movable spring 5 is attracted by the excitation of the coil 3, its attractive force is applied. and return spring 12
The difference in force between the return force and the return force becomes the contact force between the movable contact 5b and the other fixed contact 8b', causing variation in the contact pressure in the vertical direction, that is, at the mounting position between the movable spring 5 and the mounting terminals 4a and 4b. Even if there is a deviation, the side piece 11
This means that it can be absorbed by the meandering parts 4a and 4b consisting of a and 11b.

Figures 4a, b, and c show other embodiments of the present invention, in which the meandering portions 9a, 9b are formed by folding back the side piece 11b, and the side piece 11a side is formed by mounting terminals 4a, 4b. Alternatively, the side piece 11a can be omitted and only the side piece 11b is used.

As described above, according to the electromagnetic relay of the present invention, the movable spring 5 is provided with the meandering portions 9a and 9b to connect the mounting terminal 4.
By attaching it to a and 4b, the stiffness of the movable spring 5 at the attachment part is reduced, and the influence of the contact force due to the misalignment of the attachment position of the movable spring 5 is eliminated, and the contact force is of course stabilized. , meandering part 9
By providing side pieces 11a and 11b on a and 9b, it is possible to eliminate misalignment of the contact position.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional electromagnetic relay. 2 to 4 show an embodiment of the electromagnetic relay of the present invention, FIG. 2 is a perspective view of a movable spring block, FIG. 3 is an assembled perspective view, and FIGS. FIG. 3 is a front view showing another embodiment of the invention. 1... Vessel body, 2... Iron core, 3... Coil, 4
a, 4b...Mounting terminal, 5...Movable spring, 6...
Insulator, 7... Movable iron piece, 8a, 8b... Fixed contact terminal, 9a, 9b... Meandering portion.

Claims (1)

[Scope of utility model registration request] A set of mounting terminals facing a fixed contact terminal is planted on the body equipped with a coil and an iron core, and a set of movable springs lying across the fixed contact terminal and the mounting terminal are used to swing vertically and horizontally. A movable meandering portion is provided, each end of the movable spring is fixed to the set of mounting terminals, and each intermediate portion of the movable spring is fixed to a movable iron piece that engages with the iron core via an insulator. An electromagnetic relay characterized by: