JPH0421221Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of the Invention) The present invention relates to a contact opening/closing mechanism of an electromagnetic relay, etc., and in particular, the present invention relates to a contact opening/closing mechanism of an electromagnetic relay, etc., and in particular, the present invention relates to a contact opening/closing mechanism of an electromagnetic relay, etc. Regarding the MBB contact opening/closing mechanism.

(Prior art and its problems) As this type of contact opening/closing mechanism, for example,
There are the ones shown in the front view of the figure, the plan view of FIG. 5, and the side view of FIG.

In the figure, 101 is a movable contact terminal, and by branching from the middle, the first and second movable contact terminals 1
02a, 102b are formed, and the first and second movable contact terminals 102a, 102b have a first
and second movable contacts 103a, 103b are attached. One first movable contact terminal 102a
The other second movable contact terminal 10 is bent by bending.
It is provided offset in the operating direction with respect to 2b. A card 104 is attached to the end of a movable iron piece that operates in response to the excitation and demagnetization of the electromagnet. And the arrow corresponds to the operation of the electromagnet.
It reciprocates in the XY direction (FIG. 5), thereby moving the first and second movable contact terminals 102a and 102b located within the locking recess 105.

5 and 6 show the first and second movable contacts 1
03a and 103b are the first and second fixed contacts 106
a, 106b, the card 104 moves in the direction of arrow X from this state, thereby connecting the first movable contact 103a and the first fixed contact 106.
a is separated and only the second movable contact 103b and the second fixed contact 106b are connected, and conversely, when the card 104 moves in the direction of arrow Y, the second movable contact 10
3b and the second fixed contact 106b are separated, and only the first movable contact 103a and the first fixed contact 106a are connected.

As described above, one of the first movable contacts 102a is deflected relative to the other by bending, so that at least the first and second movable contacts 102a are always
An MBB contact opening/closing mechanism is configured in which one of the contacts a and 103b is connected to the other first and second fixed contacts 106a and 106b.

However, in the conventional example, it takes a lot of effort to accurately deviate one first movable contact terminal 102a with respect to the other second movable contact terminal 102b by a set value by bending, and the amount of deviation If it differs even slightly from the set value, there will be variations in the contact pressure between the contacts, which has the disadvantage that the switching performance of the contacts will deteriorate.

(Purpose of the invention) The present invention was made in view of the above circumstances, and is designed to allow the first and second movable contact terminals to be easily deflected by a set value without bending. The purpose is to

(Structure and effects of the invention) In order to achieve the above purpose, the invention has the following features:
In the contact opening/closing mechanism described at the beginning, the first and second movable contact terminals each have a movable contact attached to their respective ends, and the first and second movable contact terminals are engaged with both the first and second movable contact terminals, and the first movable contact terminal is engaged with both the first and second movable contact terminals. and an actuating body for the movable contact terminal, which includes a locking recess having a positioning mechanism for positioning the second movable contact terminal such that the second movable contact terminal is deviated relative to each other in the operating direction.

According to this configuration, when each of the first and second movable contact terminals is inserted into the locking recess of the actuating body, the position is automatically determined by the positioning mechanism in the locking recess, and the first and second movable contact terminals are automatically positioned. The first and second movable contact terminals are offset relative to each other by a set value in the actuation direction.

Therefore, by simply inserting the first and second movable contact terminals into the locking recesses of the actuating body, both can be easily displaced by a set value, thereby simplifying the manufacturing process. At the same time, it became possible to obtain an MBB contact opening/closing mechanism with excellent opening/closing performance.

(Description of Embodiments) Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. Figure 1 relates to an embodiment of the present invention.
FIG. 2 is a front view of the MBB contact opening/closing mechanism, and FIG. 2 is a side view.

In the figure, reference numeral 1 denotes a movable contact terminal made of a leaf spring, and in the middle there are first and second movable contact terminals 2,
3, and first and second movable contacts 4 and 5 are attached near the tips of the first and second movable contact terminals 2 and 3, respectively.

6 is a card made of a synthetic resin molded product as an operating body, and the card 6 has a locking operation recess 7.
is provided. Inside the locking recess 7, there is a first protrusion 8 near the inner part, and a second protrusion 8 near the entrance.
Projections 9 are provided to project from the inner surfaces facing each other. In this way, the first protrusion 8
By providing the second protrusion 9 and the second protrusion 9, the inner space of the locking recess 7 becomes bent, and the first
A first space 10 facing the protrusion 8 and a second protrusion 9
It is located relatively offset from the second space 11 facing . The first and second protrusions 8 and 9 constitute a positioning mechanism.

The first movable contact terminal 2 of the movable contact terminal 1 is inserted into the second space 10 of the locking recess 7.
The movable contact terminal 3 is provided so as to be located within the second space 11, and the first movable contact terminal 2 and the second movable contact terminal 3 are arranged so that they are deviated relative to each other in the direction of their operation. is positioned.

To install the first and second movable contact terminals 2 and 3 into the locking recess 7, the first and second movable contact terminals 2 and 3, which are not deviated from each other, are moved in the direction of the arrow (the direction of the arrow). (Fig. 2) into the locking operation recess 7.
At this time, the first movable contact terminal 2 is smoothly guided into the first space 10 along the inclined surface 12 provided below the first protrusion 8 .

The opening and closing operations of the contacts accompanying the operation of the card 6 are the same as in the conventional example, and will therefore be omitted.

FIG. 3 shows another embodiment, in which a partition wall 13 is provided as a positioning mechanism in the locking recess 7 of the card 6, and the first and second movable contact terminals 2 and 3 are positioned on both sides of the partition wall 13. and are relatively offset from each other.

In the above embodiment, the first and second movable contact terminals 2 and 3 are constructed by branching out from the middle of a single flat movable contact terminal 1, but in the present invention, the first and second movable contact terminals 2 and 3 are The second movable contact terminals 2 and 3 may each be formed of separate members, and may be integrated at the location where they are attached to the fixed portion.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the MBB electric contact opening/closing mechanism according to the embodiment of the present invention, FIG. 2 is a side view also including a partially cutaway cross section, and FIG. FIG. 4 is a front view showing a conventional example, FIG. 5 is a plan view, and FIG. 6 is a side view including a partially cutaway cross section. 2...First movable contact terminal, 3...Second movable contact terminal, 4...First movable contact, 5...Second movable contact, 6...Card (operating body), 7...Latching operation recess .

Claims (1)

[Claims for Utility Model Registration] First and second movable contact terminals each having a movable contact attached to an end thereof; an MBB contact comprising an actuating body for the first and second movable contact terminals, which includes a locking actuating recess having a positioning mechanism that positions the second movable contact terminals so that they are relatively offset from each other in the actuating direction; Opening/closing mechanism.