JPS6311734B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polarized reed relay with improved contact reliability.

As shown in FIGS. 7 and 8, the conventional polarized reed relay has magnetic pole pieces 14' and 15' having fixed contacts 19' and 20' disposed above and below a magnet chamber 4a', and A permanent magnet 21' is simply disposed on the lower magnetic pole body 15', and fixed contacts 19',
The tip of the lead 9' connects each fixed contact 19' between 20' and 20'.
It is configured to be able to come into contact with and separate from 20'. However,
In the conventional example described above, there is no means to adsorb organic gas that exists near the contact due to impact or friction when opening and closing the contact, so the contact material and this organic gas react, causing the contact surface to This has been accompanied by the disadvantage that an insulating film or polymer such as powder is formed on the contact surface, resulting in poor contact.

SUMMARY OF THE INVENTION An object of the present invention is to provide a polarized reed relay that improves the above-mentioned drawbacks and prevents contact failure.

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

1 to 5 show an embodiment of the present invention.
In these figures, 1 is a coil block having a hollow coil frame 2, the coil frame 2 has hollow enlarged parts 3 and 4 formed at both ends, and a coil 5 is wound around the copper body part. ing. Coil terminals 6 and 7 are simultaneously molded on the enlarged portions 3 and 4, respectively, and a common terminal 8 is formed on one of the enlarged portions 3.
is press-fitted and fixed. The common terminal 8 is formed into a substantially U-shape, and includes a fixed portion 10 to which the base end of a lead 9 whose free end passes through the coil frame 2 is fixed approximately at the center, and leg portions extending on both sides of the enlarged portion 3. 11.

On the other hand, a hollow magnet chamber 4a is formed in the other enlarged portion 4, and engagement grooves 12, 13 cut horizontally are formed in the upper and lower ends, respectively, into which magnetic pole bodies 14, 15 are inserted. Fixed. The magnetic pole bodies 14 and 15 have terminal parts 16 and 17 extending to both sides of the enlarged part 4, and have a small contact gap 1.
Fixed contacts 19 and 20 facing each other with 8 in between are fixedly installed. A free end of a lead 9 fixed to the common terminal 8 extends into the contact gap 18 . Further, a permanent magnet 21 is disposed between the magnetic pole bodies 14 and 15 disposed above and below within the magnet chamber 4a.

A getter member 22 made of a getter material processed into a rectangular parallelepiped is integrally connected to the permanent magnet 21 on the upper surface of the permanent magnet 21 through a fixing means such as adhesive, and together with the permanent magnet 21, a getter member 22 is formed by processing a getter material into a rectangular parallelepiped. A magnetic pole body 1 arranged in a magnet chamber 4a that also serves as a chamber
It is stored between 4 and 15. To explain this structure in more detail, a permanent magnet 21 is attached to the inner surface of one of the magnetic pole pieces 15.
is placed thereon, and a getter member 22 is closely disposed between the end surface of this permanent magnet 21 and the inner surface of the other magnetic pole body 14. This getter material is made of a porous material made of ceramic or activated carbon molded with resin.The characteristic of this getter material is that gas molecules are adsorbed and trapped in the small pores on the material surface, preventing polymer formation, and thus preventing contact points. This plays a role in improving contact reliability.

Reference numerals 23 denote the coil terminals 6, 7, the leg portions 11 of the common terminal 8, and the terminal portions 16, 1 of the magnetic pole bodies 14, 15.
7 is a bottom cover projecting downward and mounting the coil block 1 ; 24 is a plate plate placed on the upper surface of the coil block 1 ; 25 is a plate mounted on the bottom cover 23 so as to surround the coil block 1 ; This is a magnetically shielded case.

When assembling, the polarized reed relay can be assembled by placing the coil block 1 on the bottom cover 22, placing the plate plate 24 thereon, and then attaching the shield case 25.

If the coil 5 of the coil block 1 is now excited, the magnetic force of the permanent magnet 21 is canceled and the lead 9 is attracted from, for example, one fixed contact 20 to the other fixed contact 19, thereby switching the contacts. In this case, the organic gas generated by opening and closing the contacts of the relay is adsorbed into the small pores on the surface of the getter member 22, and the main cause of polymer formation is removed, thereby preventing damage to the contact surfaces.

FIG. 6 shows another embodiment of the invention. This embodiment differs from the previous embodiment in that the top and both side surfaces of the rectangular parallelepiped permanent magnet 21 are surrounded by a U-shaped getter member 22a, which is inserted into the magnet chamber without any gaps. There is. That is,
In this embodiment, the magnet chamber is sealed by a getter member 22a that is integrally arranged around the permanent magnet 21, so that the getter member can more effectively remove organic gas generated when opening and closing contacts. This makes it possible to adsorb it with 22a. Note that the other configurations are substantially the same as those of the above-described embodiments, so detailed explanations will be omitted to avoid duplication of explanation.

According to the present invention configured as described above, a getter member that adsorbs organic gas generated therein when the contact is opened is installed between the magnetic pole bodies constituting the magnet chamber that also serves as the contact chamber near the contact, using a permanent magnet. Because they are closely spaced together, most of the space between the magnetic pole pieces is blocked, effectively adsorbing organic gas and preventing polymer formation on the contact surface, which has the advantage of improving the contact reliability of the contact. .

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a polarized reed relay according to the present invention, Fig. 2 is a cross-sectional view of the above, Fig. 3 is a sectional view of the same as seen from the left, and Fig. 4 is a cross-sectional view of the same as seen from the right. 5 is a longitudinal sectional view of the present invention, FIG. 6 is a partial perspective view showing another embodiment of the present invention, and FIGS. 7 and 8 are conventional polarized reed relays. 1 ...Coil block, 2...Coil frame, 3, 4...
Ampulla, 5... Coil, 6, 7... Coil terminal, 8...
Common terminal, 9... Lead, 10... Fixed part, 11... Leg part, 12, 13... Engagement groove, 14, 15... Magnetic pole body,
16, 17... Terminal part, 18... Contact gap, 19, 2
0... Fixed contact, 21... Permanent magnet, 22, 22a...
Getter member, 23...bottom cover, 24...plate plate, 25...shield case.

Claims (1)

[Claims] 1. A magnet chamber formed at one end of a coil frame, in which magnetic pole bodies each having a fixed contact at the top and bottom are arranged to face each other, and the tip of a lead is arranged between the fixed contacts so as to be able to come into contact with and separate from it. In the polar reed relay, a getter member is provided between the end face of the permanent magnet mounted on one inner surface of the magnetic pole body and the other inner surface of the magnetic pole body, which adsorbs organic gas generated when the contacts are opened and closed. A polarized reed relay characterized by close arrangement.