JPH03141530A - Thin type lead relay - Google Patents

Abstract

PURPOSE:To decrease fluctuation or deformation of a spring load of a lead and provide a thin type lead relay of stable action characteristics by protruding the lead from both side end surfaces of its base end, and connecting their forward ends with arms supported by an insulation substrate. CONSTITUTION:A lead 23 is formed integrally of a lead main body part 23A and arms 23B, 23C. The arms 23B, 23C are protruded from both side end surfaces close to a base end 23a of the lead 23, that is a lead main body part 23A, to extend along the length on both sides of the width of the lead main body part 23A, and their forward ends are integrally moulded with the insulation substrate to be supported by it. In this constitution, need of support springs for supporting the lead 3 is eliminated, and a welding process which may cause fluctuation or deformation of the spring load of the lead is eliminated, thereby its action characteristics are stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thin reed relay that is mounted on a printed wiring board and used in communication instruments and the like.

[Conventional technology]

Conventional thin reed relays generally have the configurations shown in FIGS.
No. 5). This thing consists of a coil frame 1 having a cylindrical part 1a having a predetermined space S inward and a flange part 1b+lc on both sides thereof, a coil 2 wound around the cylindrical part 1a of the coil frame, and a coil 2 having an approximate length. The cylindrical part 1 is plate-shaped and most of it is a coil frame.
A glue 3 made of a magnetic material and arranged in such a way that its base end 3a is supported and the other end 3b protrudes from the cylindrical portion 1a.
and the contact surface 3c alternately depending on the operation of the other end 3b of the lead.
, two fixed contacts 4 and 5 made of magnetic material, the contact surfaces 4 c + 5 d facing each other with a predetermined gap g so that they can come into contact with and separate from the front and back surfaces of the other end 3 b functioning as 3 d, and the contacts of both fixed contacts. A permanent magnet 6.6 insulatively inserted between the ends except for surfaces 4c and 5d, a lead 3 and two fixed contacts 4.
．． 5, an insulating substrate 8 on which a terminal (not shown) is implanted, and a base end 3a side of the lead and each fixed contact 4.5.
The main components are yokes 9 and 10 that magnetically couple the two.

The lead 3 is formed by fitting and welding a connecting piece of a conductive support spring 11, whose facing piece is supported by an insulating substrate 8 and has a mouth shape, into a recess 3e in its base end 3a. 1
1 and is supported. Therefore, the other end 3b of the lead 3 can be displaced in the thickness direction using the opposing piece base of the support spring 11 or the fixed location of the base end 3a as a fulcrum. In addition, for electrical connection between the two fixed contacts 4.5 and terminals not shown, an extending piece is provided on the base end side of each terminal to abut the corresponding fixed contacts 4 and 5, and each Fixed contacts 4 and 5 are fixed by welding. In addition, a coil terminal (
(not shown) are planted.

The magnetic flux of the permanent magnets 6, 6 in such a relay is as follows: permanent magnets 6, 6→upper upper fixed point 4→predetermined gap g (including the other end 3b of the lead 3, that is, the contact surface)→lower fixed contact 5→permanent magnet 6 , 6, and the permanent magnets 6, 6 → upper yoke 6 (including the one via the upper fixed contact 4) → the base end 3a of the lead 3 → the lead 3 → the other end 3b of the lead 3. The liquid flows through the second path, which is the back surface, that is, the lower contact surface → the lower fixed contact 5 → the permanent magnets 6, 6, respectively. Therefore, when the coil 2 is not energized, the lead 3 is connected to the lower fixed contact 5.
is attracted to and comes into contact with it.

In this state, when the wire 3 is brought into contact with the upper fixed contact 4, the coil 2 is energized so that a magnetic flux flows in a direction that cancels the magnetic flux of the permanent magnets 6, 6.

Note that by changing the way the spring force of the support spring 11 is set, a bistable type can be obtained.

[Problem to be solved by the invention]

However, in the conventional device described above, since the lead 3 is welded by fitting the connecting piece of the support spring 11 into the recess 3e, it is necessary to maintain the welding conditions strictly. If these welding conditions vary, there is a problem in that the spring load on the lead 3 fluctuates or the lead 3 deforms, making it difficult to obtain stable operating characteristics.

The present invention has been made in view of the above circumstances, and its purpose is to provide a thin reed relay whose operating characteristics are stabilized by reducing the degree of spring load and deformation of the leads.

[Means to solve the problem]

The thin reed relay of the present invention has a structure in which the leads protrude from both end faces in the vicinity of the base end, and are connected to arms that extend longitudinally on both sides in the width direction, and whose tips are supported by an insulating substrate.

Further, it is desirable to form the lead and the lead terminal integrally, and in this case, the step of fixing them, which was necessary in the conventional device, can be omitted.

[Effect]

According to the present invention, there is no need for a support spring for supporting the reeds as in the conventional ones, and therefore there is no welding process that causes fluctuations or deformation of the spring load on the reeds, thereby stabilizing the operating characteristics.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIG. 1 and FIG. 4. Note that substantially the same members as those described in the related art are designated by the same reference numerals.

Reference numeral 1 denotes a coil frame, which, like the one shown in FIG.
b. Forms a basic shape with an IC.

One crocodile part 1b has a vertical groove 1d that supports a yoke, which will be described later.
, le are provided at the top and bottom, and a coil terminal (not shown) is installed. The inner space S is the other flange l
The c side is open, and the flange lh side has upper and lower vertical grooves 1d and l.
It is formed as a square hole having a predetermined dimension to a position deeper than the position where e is tied.

The other flange portion 1c is provided with an accommodating portion 1f that communicates with the inner space S, has a sufficiently larger cross-sectional area, and is open axially outward, and further includes upper and lower walls forming the accommodating portion 1f. There are recesses 1g and lh on the outer surface of the
is the provision.

The coil 2 is wound around the cylindrical portion 1a of the coil frame 1.

A lead 23 is made of a magnetic material such as permalloy and has a thickness of about 0.2 mm, and has the following shape. That is, the lead 23 is integrally formed with a lead main body portion 238 that is substantially equal to the outer contour of a conventional lead, and arms 23B and 23C that are substantially equal to conventional support springs. That is, the lead main body portion 23A has a generally elongated plate shape, and its length is longer than the axial length of the square hole forming the space S, and shorter than the sum of this and the axial length of the accommodating portion If. Further, the arms 238 and 23C protrude from both end surfaces near the base end 23a of the lead 3, that is, the lead body portion 23A,
The lead main body portion 23A extends longitudinally on both sides in the width direction, and its tips are integrally molded with and supported by an insulating substrate, which will be described later. Further, the arm 23B on the side connected to the lead terminal 7a is slightly longer than the other arm.

Most of the lead main body portion 23A is located inside the cylindrical portion 1a, that is, within the space S, and as a result, the other end 23b protrudes from the cylindrical portion 21a, and the arm 2
It can be moved in the thickness direction using the tip of 3B as a fulcrum. Both surfaces of the other end 23b are plated with conductive plating to form contact surfaces 23c and 23d of the leads as movable contacts.

The upper and lower fixed contacts 4.5 protrude on the side facing the rectangular parallelepiped bases 4a, 5a, which have a length equal to the inner diameter of the housing part 1f of the coil frame 1, and have a width slightly wider than the width of the lead 3. It consists of central parts 4b and 5b. This rain central part 4b,
The opposing end surface of 5b is conductive plated to form the contact surface 4c.
, 5d. Furthermore, both contact surfaces 4c and 5d are arranged so as to face each other with a predetermined gap g so as to alternately come into contact with and separate from each other according to the operation of the other end 23b of the lead, and these are positioned by an insulating substrate to be described later. .

The permanent magnet 6.6 forms a rectangular parallelepiped, is magnetized in the vertical direction, and is insulatively inserted between the ends of both fixed contacts 4 and 5, excluding the contact surfaces 4c and 5d. For this insulation, an insulating magnet material is used or an insulating sheet is inserted between the permanent magnet 6.6 and both fixed contacts 4.5.

8 is an insulating substrate, and basically terminals 7 a 17 b are electrically connected to the lead 23 and the two fixed contacts 4.5.
+7c is to be planted. By the way, since one arm 23B of the lead 3 connected to the lead terminal 7a is integrally molded with the insulating substrate 8, the lead terminal 7a is welded to the tip of the arm 23B.

This insulating substrate 8 has an outer shape corresponding to the peripheral wall forming the housing portion 1f of the coil frame 1. The terminals 7b and 7c implanted in the insulating substrate 8 have extending pieces 7d and 7e connected to the base end side for welding to both fixed contacts 4.5, and the end surfaces thereof are arranged on the inner surface of the insulating substrate 8. It is molded integrally with it so that it is exposed. Also, on this inner surface, the arm 23 of the glued 3 mentioned above is provided.
B, supporting 23G, contact surface 4c of both fixed contacts 4.5,
5d facing each other with a predetermined gap g, and a permanent magnet 6.6
Support protrusions 8a, 8 for positioning the
b is a provision.

2 yokes9. IO is made of magnetic material, and both have approximately the same shape. These yokes 9, 10 are formed into a U-shape with base pieces 9a, 10a and side pieces 9b, 10b, and are further bent inward at right angles from the ends of both side pieces 9b, 9b, 10b, 10b. Tip piece 9c, 9c, 10c, 10c
are installed consecutively. And the yokes 9.10 are base pieces 9a, 1
0a is inserted into the vertical grooves 1d and le of the coil frame 1, and the tip pieces 9c, 9c, 10c, and 10c are fitted into the recesses 1g and lh of the coil frame 1, thereby being attached to the coil frame 1. Thereby, the yoke 9.10 magnetically couples the base end 23a side of the lead and each fixed contact 4.5.

The above-mentioned main components are housed in a casing (not shown), and each terminal 7a, 7b, 7c and a coil terminal (not shown) are installed. In addition, in FIG. 1, the coil frame l and the insulating substrate 8 are omitted.

In such a thin reed relay, the permanent magnet 6,
The magnetic flux of 6 follows a first path: permanent magnets 6, 6 → upper upper fixed point 4 → predetermined gap g (including the other end 23b of lead 23, that is, the contact surface) → lower fixed contact 5 → permanent magnets 6, 6 Then, permanent magnets 6, 6 → upper yoke 9 (including those passing through upper fixed contact 4) → base end 23a side of lead 23 → lead 23 → back surface of other end 23b of lead, that is, lower contact surface → downward The current flows through a second path from the fixed contact 5 to the permanent magnet 6,6, respectively.

Therefore, when the coil 2 is not energized, the lead 23 is attracted to the lower fixed contact 5 and comes into contact with it.

In this state, when the lead 23 is brought into contact with the upper fixed contact 4, the coil 2 is energized so that a magnetic flux flows in a direction that cancels the magnetic flux of the permanent magnet 6.6.

FIG. 5 shows a modification of the lead. This lead 3
3, the lead main body portion 33A and the other arm 33C are similar to those in the previous embodiment, but one arm 33B also has a lead terminal portion 7a integrally formed therein. In this case, when strength is required for the lead terminal portion 7a, it is preferable to use an irregularly shaped plate material that has a thicker plate thickness at that portion.This eliminates the need for welding the leads and the lead terminals.

〔Effect of the invention〕

Since the thin reed relay of the present invention is configured as described above, there is no need for a support spring for supporting the reeds as in conventional ones, and therefore there is no need for a welding process that causes fluctuations in the spring load or deformation of the reeds. The operating characteristics can be stabilized by reducing fluctuations and deformation of the spring load of the lead.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows Fig. 3, Fig. 4 shows Fig. 5, Fig. 6 shows one embodiment, Fig. 7 shows Fig. 9 is a perspective view with the coil frame and insulating board omitted, an exploded perspective view of the main parts, a perspective view of the main parts, a perspective view of the lead, and a modified example of the lead. These are a perspective view of a conventional example, with the coil frame and insulating substrate omitted, a plan view of the coil frame cut horizontally, a perspective view of the main parts thereof, and a perspective view of the leads. frame, 1a-cylindrical part, 1b, IC-flange part, 1f-accommodating part,
S・-space, 2-coil, 23--lead, 23a 3A 23B, 23G 4-upper fixed contact, 5--lower fixed contact, 6.6--permanent magnet, 8--insulating substrate, 7a , 7b, 7c base end, 23b - other end, - lead body, ... lead terminal part, 4c... - contact surface, 5d - one contact surface, terminal, 9.10 - - yoke, g -...Specified gap between fixed contacts.

Claims (1)

[Claims] (1) A coil frame that has a cylindrical part with a predetermined space inside and flanges on both sides, a coil wound around the cylindrical part of the coil frame, and a coil that has a roughly long plate shape and most of which is a coil. A lead made of a magnetic material is positioned inside the cylindrical part of the frame so that the base end is supported and the other end protrudes from the cylindrical part, and can alternately move toward and away from the lead depending on the movement of the other end of the lead. two fixed contacts made of magnetic material whose contact surfaces face each other with a predetermined gap, a permanent magnet inserted insulatively between the ends of both fixed contacts excluding the contact surfaces, and a lead and two fixed contacts. A thin reed relay comprising: an insulating substrate embedded with a terminal electrically connected to a fixed contact; and a yoke magnetically coupling the proximal end of the lead to each fixed contact. This is a thin relay characterized by a series of arms protruding from both end faces near the base end, extending in the longitudinal direction on both sides in the width direction, and having arms supported at their tips by an insulating substrate.