JPS6055938B2 - 2 transfer lead type relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called two-transfer lead type relay having two sets of contacts.

Conventionally, as shown in FIG. 1, in this type of two-transfer lead type relay, first and second movable contact plates 7' and 8' facing each other are disposed inside a coil bobbin 2'. The fixed ends of the second movable contact plates 7' and 8' are connected to iron cores 9' and 9 disposed on the sides of the magnetic pole plates 5' and 5', respectively, which are arranged on opposite sides of the coil bobbin 2'.
It is fixed so that its end portion comes into contact with each magnetic pole plate 5' via '.

However, in this structure, differences in the magnetic flux flowing through the main gap between the two sets of contacts tend to occur due to variations in the material, dimensions, etc. of the armature made up of the movable contact plates 7' and 8'. As a result, the contact through which more magnetic flux flows closes earlier, reducing the magnetic resistance value of the main gap, and further causing a difference in the flow of magnetic flux, which increases the delay in the operation of the other contact. was accompanied by SUMMARY OF THE INVENTION An object of the present invention is to provide a two-transfer lead type relay which improves the above-mentioned drawbacks and prevents variations in the operation of two sets of switching contacts.

The present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the present invention. In the figure, 1 is a metal shield case, and a coil bobbin 2 made of synthetic resin is housed inside.

The coil bobbin 2 consists of a hollow central body part 2a and flanges 2b and 2c integrally formed at both ends of the central body part 2a, and a coil 3 is wound around the outer periphery of the central body part 2a. Furthermore, four treasures 4, 4 are formed on each flange 2b, 2c, respectively, and are integral with the hollow part of the central body 2a. A pair of magnetic pole plates 5, 5 are arranged on the upper and lower sides of each of the four treasures 4, 4, respectively, so as to face each other. The central body portion 2a side of each magnetic pole plate 5 is bent into an L-shape so as to face each other, whereby fixed contacts 5a, 5a facing each other through a predetermined gear-up are formed at the tips of the bent portions. Permanent magnets 6, 6 are respectively disposed on the magnetic pole plates 5, 5 located on the lower side in the figure. In the central body portion 2a of the coil bobbin 2, first and second movable contact plates 7 and 8 made of a magnetic material are disposed so as to face each other and be slightly spaced apart from each other. That is, the free end of the first movable contact plate 7 is arranged between the gaps so as to come into contact with and separate from the fixed contacts 5a, 5a provided on the flange 2b side, and the fixed end 7a on the opposite side is provided on the flange 2c side. The magnetic pole plate 5 is spaced apart from the magnetic pole plate 5, and is appropriately fixed at a position inside the magnetic pole plate 5. Further, the free end of the second movable contact plate 8 is arranged so as to be able to come into contact with and separate from the fixed contacts 5a, 5a on the flange 2c side, and the fixed end 8a is fixed apart from the magnetic pole plate 5 on the flange 2b side, and the coil bobbin A switching contact is provided in each end of the 2. In the two-transfer lead type relay configured in this way, in normal times, the free ends of the first and second movable contact plates 7 and 8 are connected to the permanent magnet 6.
Due to the suction force, in the illustrated state, the contacts 5a, 5a are brought into contact with the fixed contacts 5a, 5a corresponding to the lower side.

Then, the coil 3 is energized and the first and second movable contact plates 7,
If the free ends of the first and second movable contact plates 7, 8 are magnetized to have the same polarity as the lower fixed contacts 5a, 5a, the free ends of the first and second movable contact plates 7, 8 will have the same magnetic poles as the lower fixed contacts 5a, 5a. In order to become a pole, it repulses and separates, and is attracted to the opposing upper fixed contacts 5a, 5a, and the contacts are switched. In this case, the first
The fixed ends 7a, 8a of the second movable contact plates 7, 8, and the . Magnetic pole plates 5, 5 of the other contact part
Since a large gap is provided between the coil 3 and the coil 3, the magnetic flux generated in the coil 3 flows to the opposing first and second movable contact plates 7 and 8, and there is a difference in the magnetic flux flowing to the two main gaps. Less likely to occur. Therefore, the movement of the two sets of switching contacts. The difference in production time will be reduced. FIG. 3 shows another embodiment of the present invention, in which the first and second movable contact plates 7
, 8 are formed by joining a non-magnetic material that can be electrically conductive to the fixed ends 7a, 8, which are marked with hunting marks.
It is configured to prevent leakage of magnetic flux from 8a to each magnetic pole plate 5.

Note that the other configurations and operations are substantially the same as those of the previous embodiment. FIG. 4 shows still another embodiment of the present invention. In this embodiment, the width near the fixed end of the first and second movable contact plates 7, 8 is narrower than that near the free end. is,
This makes it easier to cause magnetic saturation so that the magnetic flux flows to the other movable contact plate.

The other configurations and operations are almost the same as those of the previous embodiment.
In the embodiment shown in FIGS. 3 and 4, it is also possible to fix the fixed end by bringing it into contact with the magnetic pole plate as in the conventional case, but it is preferable to use the embodiment shown in FIG. The following configuration is more effective in preventing variations in operating time.

According to the present invention configured as described above, there is no difference in the magnetic flux flowing to the free end sides of the two movable contact plates, and it becomes difficult to cause a difference in the magnetic flux flowing to the main gap. This has the effect of reducing the difference in operating time of the switching contacts.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional two-transfer lead type relay, FIG. 2 is a cross-sectional explanatory view of an embodiment of the present invention, and FIG. 3 is a side view of a movable contact plate according to another embodiment of the present invention. , FIG. 4 is a perspective view of a movable contact plate according to still another embodiment of the present invention. 1... Shield case, 2... Coil bobbin, 3... Coil, 4... Concave chamber,
5...Magnetic pole plate, 6...Permanent magnet, 7,
8...Movable contact plate, 7a, 8a...Fixed end.

Claims (1)

[Scope of Claims] 1. Magnetic pole plates are arranged in both ends of a hollow coil bobbin housed in a shield case, and the free ends are arranged so that they come into contact with and separate from fixed contacts formed by the respective magnetic pole plates. 1. In a reed type relay in which a second movable contact plate is arranged and constitutes two sets of contacts, the fixed ends of the first and second movable contact plates are separated from the magnetic pole plates arranged at both ends of the coil bobbin. A two-transfer lead type relay characterized in that permanent magnets are respectively disposed in the movable contacts of both movable contact plates and in the magnetic pole plates that turn on and off. 2. A two-transfer lead type relay according to claim 1, wherein the first and second movable contact plates are bonded with a non-magnetic material near their fixed ends. 3. A two-transfer lead type relay according to claim 1, wherein the vicinity of the fixed end of the first and second movable contact plates is formed thinner than the vicinity of the free end.