JPH04196018A - Contact - Google Patents

Abstract

PURPOSE:To facilitate assembly and to perform it surely by mounting contact pieces on one side or on both sides of a base having an almost U-shaped section so as to form a contact block and inserting a contact spring or the like between the base opposing pieces of the block for pinching and fixing it. CONSTITUTION:A COM movable contact 10 is so composed that a contact block 15, in which contact pieces 14 are fitted on both sides of a base 13 whose sectional form is nearly U-shaped is interposed between one side ends of a contact spring 16 for being pinched fixed. This contact block 15 is inserted through the contact spring 16 to be pinched between the opposing pieces 13a, 13a of the base 13 in order to inwardly bend the ends of the base opposing pieces 13a, 13a facing each other to fix them together in caulking. Accordingly, by making the sectional form of the base 13 nearly U-shaped, contact parts can be simply mounted on both sides of one base 13 so as to rationalize formation of double-heated contacts. Thereby, it is required for simplifying assembly only to insert and pinch the contact spring between the opposing pieces of the base.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to contact structures for relays, switches, and the like.

[Conventional technology]

Conventionally, there is a contact point of this type as shown in FIG.

FIG. 4 shows a relay equipped with a double-headed contact a, which includes a base b, a cover C, an electromagnet part d disposed on the base b, and a contact part e. The contact portion e is arranged such that a movable double-headed contact a attached to a plate-shaped movable spring f faces fixed terminals g and a fixed contact h attached to both fixed terminals g. According to the movement of the card driven by the operation of the electromagnet part d, the movable spring f is driven, and the movable double-headed contact a makes contact with the fixed contact h.
Dissociation is now taking place.

Further, in the movable double-headed contact a, contact pieces n are welded to both ends of the movable spring f via a base m, respectively.

[Problem to be solved by the invention]

The contact point a explained in the conventional example has the advantage that manufacturing can be streamlined because it is formed into a hoop material and then cut into short predetermined lengths.

However, when used in relays, switches, etc., the base parts m are fixed to both sides of the movable spring f by welding or the like, which poses a problem of poor assembly workability.

The present invention is an attempt to improve the above-mentioned problems, and its purpose is to provide a contact that can be assembled into a contact spring with improved ease of assembly.

[Means to solve the problem]

In order to achieve the above object, the present invention has a base having a substantially U-shaped cross section, and the base is clamped and fixed to a contact spring or a fixed terminal.

[Effect]

By making the cross-sectional shape of the base substantially U-shaped, the contact parts can be easily attached to both sides of one base, and the formation of double-headed contacts can be streamlined. It can be easily assembled by simply inserting the spring and clamping it.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Fig. 3 shows a relay employing the contacts of the present invention.
The explanation will be based on a) to (C).

In the same figure, the relay 1 consists of a base 2, an electromagnet part and a contact part attached to the base 2, and a cover 3 attached to the base 2 so as to cover the electromagnet part and the contact part. .

The electromagnet section includes a coil 4, a coil hobbin 5, an iron core 6,
It is composed of an abbreviated yoke 7, an armature 8, and a return spring 9.

The yoke 7 has one end magnetically coupled to the iron core 6, and the other end has a bent portion 8 of the armature 8.
c is in contact. Further, the armature 8 has one end 8a urged away from the other end 6a of the iron core 6 by the return spring 9, and when the coil 4 is not energized, it is in the state shown in FIG. 3(a). When the coil 4 is energized, the one end 8a is attracted to the other end 6a of the iron core 6, and while the armature 8 bends the return spring 9, it is bent so that the other end 8b moves to the left in the same figure. It is adapted to move using the portion 8c as a fulcrum. Note that when the coil 4 returns to the non-excited state, the armature 8 is returned to its original state by the return spring 9.

As shown in FIGS. 3(a) and 3(b), the contact portion has a C
It consists of an OM movable contact (double-ended contact) 10, a No fixed contact 11, and an NC fixed contact 12. As shown in FIGS. 1(a) and 1(b), the 20COM movable contact 10 has contact pieces 14 attached (welded) to both sides of a base 13 (non-contact part) having a substantially U-shaped cross section. ) is sandwiched and fixed to one end of a contact spring 16.

As shown in FIG. 2, the contact block 15 is formed into a long hoop shape and cut into a predetermined length, so that uniform contacts can be easily obtained. This contact block 15 is connected to the opposing pieces 13a and 13 of the base 13.
The contact spring 16 is inserted and sandwiched between the base facing pieces 13
As shown in FIG. 1(a), the ends of a and 13a are bent inwardly and fixed by caulking.

Further, one end portion 16a of the contact spring 16 is attached to the contact block 1.
A card 17 (usually made of a synthetic resin material with good insulation properties) extends upward from the armature 5 and is brought into contact with the armature 8 .

Like the COM movable contact 10, the NO fixed contact II is a contact bronck 2 in which a contact piece 19 is attached to one side (COM movable contact 10 side) of a base 18 having a substantially U-shaped cross section.
0 is clamped and fixed by a plate-shaped fixed terminal 21 (equivalent to the contact spring 16). The contact block 2
0 is also formed in the same manner as the contact flock 15 described in +ii.

Further, the NC fixed contact 12 is attached to a fixed terminal 22 fixed to the base 2.

Contact springs 16 and fixed terminals 21 of these contacts 10 to 12
．． 22 and the coil 4 inside and outside the relay 1 are electrically connected to external terminals 23 .
It was carried out on 24.26.27.

The card 17 is supported by a sliding guide section 28 erected on the base 2 so as to be slidable in the left-right direction in FIG. It has become.

In the relay 1, when the coil 4 is not energized, the COM movable contact 10 is in contact with the NC fixed contact 12, and the coil 4 is in contact with the NC fixed contact 12.
When the armature 8 is excited, the other end 8b of the armature 8 is connected to the card 17.
is moved to the left side in the figure, contacts one end 16a of the contact spring 16, presses and bends the contact spring 16, and
The movable contact 106 is separated from the NC fixed contact 12 and comes into contact with the No fixed contact 11.

Then, when the coil 4 returns to non-excitation, the other end 8b of the armature 8 is returned to the right side, and the pressing force on the one end 16a of the contact spring 16 is removed, so that the card 17 is Pushed back and returned to original position, COM
The movable contact 10 is separated from the No fixed contact 11 and comes into contact with the NC fixed contact 12.

〔Effect of the invention〕

As explained above, in the present invention, a contact piece is attached to one or both sides of a base having a substantially U-shaped cross section to form a contact block, and a contact spring or the like is inserted between the pieces of the block facing the base. By clamping and fixing the parts, assembly can be easily and reliably performed.

[Brief explanation of the drawing]

FIG. 1(a) is a side view showing one embodiment of the present invention.
Figure (b) is a plan view of the same as above; Figure 2 is a perspective view showing a contact block; Figure 3 (a) is a partially broken pressure surface view showing an example of a relay employing the contacts of the present invention; 3(b) is a left side view of the same as above, FIG. 3(C) is a right side view of same as above, and FIG. 4 is a partially broken pressure surface view of an example employing a conventional contact point. 10... (COM) Movable contact, 13... Base, 14... Contact piece, 15... Contact block, 16... Contact spring. Patent Applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Seiji Sato (and 1 other person) LO(0 "()

Claims (1)

[Claims] (1) A contact block is formed by attaching a contact piece to one or both sides of a base having a substantially U-shaped cross section, and a contact spring or the like is inserted between the pieces of the block facing the base and fixed by clamping. A contact point characterized by: