JPS59111219A - Relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the malleability of output relays used in protective relays and the like. For convenience of explanation, an output relay of a protective relay will be explained below as an example.

With the recent trend toward stationary operation, protection relays have tended to have improved durability, but contact relays are generally used for the output section due to electrical requirements. Conventionally, there has been an output relay for a protective relay as shown in FIG.

In the figure, (1) is a fixed iron core, (2) is a fixed iron core (1
) is a movable iron core that is supported so as to allow transmission of sound around one end of the axis, (
3) is a contact piece fixed to the T moving iron core (2) with screws, etc., and (4) is a contact piece that is brazed to one end of the movable contact piece (3).
(5) is a terminal fixed to the output relay frame (not shown), etc.; (6) is a fixed point joined to terminal (5) by brazing, caulking, etc. The contact point (7) is the coil attached to the ml constant iron core (1), (8
) is a spring that is suspended from both the fixed core (1) and the retractable core (2).

In the same figure, when a signal from the detection part of the pulse protector is applied to the coil (7), the cable core (2) is attracted toward the fixed core (1), and the OT moving contact ( 4) and the fixed contact (6) come into contact and the 0TwJJ contact piece (3) to 01
An electric circuit 75i is formed between the moving contact (4) and the fixed contact (6) to the terminal (5).When the signal from the detection section disappears, the coil (7) is removed and the spring ( Due to the force 8), the rotating iron core (2) returns to its original position and the contacts (4) and (6) Vi open.

In the output relay configured in this way, when vibration is applied from the outside due to a cause such as ground A, the coil (7) is in an excited state regardless of the signal from the detection part, and the output voltage is 0 TdJ.
There was a drawback that the J contact (4) and the fixed contact (6) were opened and an erroneous output signal was generated.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by configuring a plurality of contacts with different resonance frequencies in parallel to a contact corresponding to one circuit in a relay, To provide a relay whose purpose is to have good earthquake resistance.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, (3a) and (3b) are the support part (3a) of the 0T moving part (2) and the 9 auxiliary contact (3),
(3b) Mechanically integrated into a base consisting of separate sections. d
The movable contact piece (
3) is divided into two so that the widths are unequal as shown in the figure, and each divided mouth ■vJJv tentacle piece (3a), (3b)
Of moving contacts (4a) and (4b), which serve as first contacts, are joined to each tip by brazing, caulking, or the like.

(5) is a terminal, (6) is a fixed contact that becomes the second contact,
As shown in Fig. 1, each is composed of a single part, with movable contacts (4
It is configured to be electrically connected in parallel to both a) and (4b).

Figures 3 and 4 illustrate the related dimensions of the Machi VJ contact pieces (3a) and (3b), and the Orr contact piece (3a) has a length of 1.4 x t and a width of M However, the length and thickness of the movable contact piece (3b) are equal to (3a), and the width is W2.
Manufactured to have.

The natural circular vibration dJ for the or front liquid contactor piece 3a) and (30) configured as above is expressed by the formula (1) (1958, published by Temaruzen, "Kisei gt4jj: J P6
70 citations).

In addition, the vibration direction is the production direction of the movable contact, and 0T#
The weight of contacts (4a) and (4b) is ignored.

Yixian m: Linear density a l = 1.875, a2 = 4.694, a 3 =
7.855...an is a coefficient determined by the lack of eigencircle oscillation and is the solution of 1-cOsha・cosa=0.

As shown in equation (1), the movable contact piece (3a) and (
In 3b), since the width W is different, the characteristic number of silkworms is also different, and the response to vibrations applied to the output relay from the outside is also different.

Figure 15 illustrates the above relationship.

In the figure, the horizontal axis represents frequency, the vertical axis represents amplitude, the solid line represents the frequency analysis results of two types of external vibrations, the dashed line represents the frequency characteristics of the movable contact piece (3a), and the dashed line represents the movable contact piece (3a). The frequency characteristics of the contact piece (3b) are shown.

Now, when a sotokensuke with a frequency component represented by the song 2 in Figure 5 is added to the output relay, its main frequency component is close to the resonant frequency of the 0Tdth contact piece (3b), so 0TwJ Although the contact (4b) malfunctions due to relatively small vibrations, the resonant frequency of the 0J# contact piece (3a) is far from the peak of curve A, that is, the main component of external vibration, so the movable contact (4a) does not easily cause malfunction.

When vibrations like curve B are applied, the contact point (4a) is likely to cause erroneous previous movement, but the contact point (4b) is less likely to cause erroneous previous movement. Contacts (4a) and (4b) are electrically connected in parallel, so if one of them maintains an open circuit, the contact as a whole will remain connected, which may impair its function as a protective relay. do not have.

In the above embodiment, a movable contact piece with a width of 1I4fx and a width of 21mm is provided, but as shown in FIG. may be different for each fixed contact, or three or more OT infant contacts having different resonance points may be electrically arranged in parallel. 1. It is also possible to vary the resonance frequency by varying the thickness of the solid movable contact piece.Also, when pressure is applied to the contact by a coil spring, etc., it is determined by the spring constant and the material guide. Two types of contacts having a natural frequency of 4 may be electrically connected in parallel. Furthermore, for relays with spring action on the fixed contact side, each fixed contact is made into a fixed contact with different natural frequencies by attaching springs with different spring constants to the base as supports, and these are fixed contacts with different natural frequencies. Even when electrically connected in parallel, the same young fruit as in the above embodiment is produced.

The support portion may be formed independently from the base, or may be formed by extending and protruding from the base. In the latter case, the parts that vibrate due to the different resonances #J may be considered as the support part, and the other parts as the base.

In addition, in the above embodiment, the explanation was limited to the output relay of a d/d relay, but it is also possible to open the contact due to vibration in a device equipped with an electric contact, such as a V-1 electromagnetic contactor used for a pond. It can be applied when it is difficult to close the circuit.

As described above, according to the present invention, since multiple contacts having different resonance frequencies are provided, a relay with high earthquake resistance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional output relay, FIG. 2 is a perspective view showing an embodiment of the relay according to the present invention, and FIG. 3 is a perspective view of a conventional output relay.
A front view and a side view of a movable contact piece of an output relay according to an embodiment of the present invention, FIG. 4 is an analysis view showing the A-A4 plane of FIG. 3, and FIG. FIG. 6, an explanatory view of #J of the output relay according to the example, is a perspective view showing another embodiment of the output relay according to the present invention. In the figure, (1) is a fixed core, (2) is a movable core (same base)
, (3), (3a), and (3b) are movable contact pieces (
(support part), (4), (4a), (4b) movable contacts (first contact L (5) is terminal 1.6), (6a), (6b)
is a fixed contact (@2 contact), (7) is a coil, (8)
It is an H spring. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1 Figure 2 Figure 9 Figure 3 Figure 4 Figure 5 M, -11 Da Figure 6 (

Claims (5)

[Claims] (1) A plurality of supporting parts mechanically integrated into the same base, first contacts attached to each of these supporting parts and having mutually different resonance frequencies, and these first contacts and points 2 A relay with a second contact that makes contact. (2) The relay according to claim 1, wherein each of the supporting portions is formed with a different width tK, so that the first contact has a different resonance frequency. (3) The relay according to claim 1, wherein the first contact has a different resonance frequency because each support portion is formed with a different length. (4) The first contact point has a different resonant frequency because each support portion is formed with a different thickness.
. (5) The relay according to claim 1, wherein each support portion has a spring with a different spring constant so that the first contact has a different resonance frequency.