JPH04357643A - Reed relay - Google Patents

Abstract

PURPOSE:To enhance the magnetic efficiency and enable adjustment of the reed even in a condition under which the yokes are mounted to a coil frame, by forming the yokes into a structure of two opposing horizontally laid letters 'U' surrounding the coil frame and the reed, and providing an opening. CONSTITUTION:Yokes 10, for the purpose of magnetically coupling a base-end 9a side of a reed 9 and each stationary contact 5, 6, are formed substantially in the form of two opposing horizontally laid 'U' letters surrounding a coil frame 1 and a reed 9 so as to face permanent magnets 7, 8 and the base end 9a. Namely, the hokes 10 are composed of yoke pieces 11, 12 and 13, a first yoke piece 11 being formed in the form of a horizontally laid letter U consisting of two opposing pieces 11a, 11b located overlapping upon the contacts 5, 6 and the magnets 7, 8 and a connection piece 11c connecting these pieces together. A second yoke piece 12 and a third yoke piece 13 are respectively formed into a horizontally laid letter U and a letter L, the former of which is composed of short pieces 12b and a connecting piece 12c and the latter of which is composed of a long piece 13a and a short piece 13b. At a position orthogonally facing the base end face of the reed 9, an opening 13d is formed which enables adjustment of the base reed 9 end. Resultantly, the magnetic efficiency is enhanced and the reed adjustment can be easily made.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particularly thin reed relay that is mounted on a printed wiring board and used in communication devices, measuring instruments, etc.

0002

[Prior Art] A conventional thin type reed relay is shown in Fig. 7.
The configurations shown in FIGS. 9 to 9 are common (for example, Utility Model Application No. 62-24455).

That is, this device includes a coil frame 1 having a cylindrical portion 1a and flanges 1b and 1c on both sides thereof, a coil 4 wound around the cylindrical portion 1a, and contact surfaces 5c and 6d with a predetermined gap between them. Fixed contacts 5, 6 made of magnetic material are arranged inside one of the collar parts 1b so as to face each other, and permanent magnets 7, 8 are arranged between the ends of both fixed contacts 5, 6.
It has a long plate shape, most of which is located inside the cylindrical part 1a, and the base end 9
a is supported and the other end 9b is the contact surface 5 of each fixed contact 5, 6
Leads 9 are arranged so as to alternately approach and separate from c and 6d.
and a yoke 10 consisting of two yoke pieces 10a, 10b that magnetically couple the base end 9a side of the lead and each of the fixed contacts 5, 6. Yoke piece 10a,
10b is fitted into and supported in a support recess appropriately formed in the coil frame 1.

Reference numeral 14 denotes an insulating substrate, and the base end 9a of the lead 9
A lead support spring 15 supporting the lead 9 and a terminal group 16 electrically connected to the fixed contacts 5 and 6 are integrally molded, and the positions of the fixed contacts 5 and 6 and the permanent magnets 7 and 8 are determined. 17 is a coil terminal.

Permanent magnet 7 in such a reed relay,
The magnetic flux of 8 is the permanent magnet 7, 8 → upper fixed contact 5 →
The first route is a predetermined gap (including the other end 9b of the lead 9) → the lower fixed contact 6 → the permanent magnets 7, 8, and the permanent magnet 7, 8 → the upper yoke piece 10a (also via the upper fixed contact 5). )→base end 9a of lead 9→lead 9→other end 9b of lead 9→lower fixed contact 6→permanent magnets 7, 8, respectively. Therefore, when the coil 4 is not energized, the lead 9 is attracted to and comes into contact with the lower fixed contact 6.

From this state, move the lead 9 upward to the fixed contact 5.
When the coil 4 is brought into contact with the permanent magnets 7 and 8, the coil 4 is energized so that a magnetic flux flows in a direction that cancels the magnetic flux of the permanent magnets 7 and 8.

[0007]

However, the above reed relay has a problem in terms of magnetic efficiency. In other words, when the magnetic flux of the permanent magnets 7, 8 flows through the second path, there is a portion that flows as if it were short-circuited between the two yoke pieces 10a, 10b, and the magnetic flux flowing to the lead 9 decreases by that amount, causing the lead to 9 becomes smaller.

In order to eliminate such drawbacks, the applicant of the present application proposed in Japanese Patent Application No. 2-197507 the arrangement of fixed contacts, permanent magnets and leads, and the arrangement of these and the yoke. The main parts are shown in Figures 10 to 12.
The configuration is shown in , where 1 is the coil frame, 4 is the coil, and 5 is the coil frame.
, 6 are fixed contacts, 7 and 8 are permanent magnets, 9 is a lead, 10 is a yoke consisting of a first yoke piece 11 and a second yoke piece 12 and is attached to the coil frame 1, 14 is an insulating board, and 16 is a contact. The terminal group 17 is a coil terminal group. Also lead 9
is integrally formed from the other end 9b provided with the contact surface to the terminal portion 9e via the bent base portion 9a. This thing connects the permanent magnets 7, 8 to the contact surfaces 5c, 6d of each fixed contact 5, 6.
By creating a yoke structure in which the magnetic flux flowing through the first yoke piece 11 and the second yoke piece 12 is difficult to leak, magnetic efficiency was improved. 2
A yoke 10 consisting of a yoke piece 12 is connected to a coil frame 1 and a lead 9.
Since the lead 9 is enclosed, it is no longer possible to adjust the lead 9 after the yoke 10 is attached. In other words, it goes without saying that if the yoke 10 is installed without properly maintaining the dimensional accuracy of the parts, or if the other end 9b of the lead 9, that is, the contact surface position changes when the yoke is installed, the suction force characteristics and spring load characteristics When attempting to align the coil frame 1, the lead 9 cannot be adjusted unless the yoke 10 is removed from the coil frame 1.

The present invention is a further improvement of the previously proposed one, and its purpose is to provide a reed relay that has improved magnetic efficiency and allows lead adjustment even when the yoke is attached to the coil frame. is to provide.

0010

[Means for Solving the Problems] In order to solve the problems, the reed relay of the present invention includes a coil frame having a cylindrical portion and flanges on both sides thereof, and a coil frame wound around the cylindrical portion of the coil frame. a coil, a fixed contact made of a magnetic material disposed on one flange of the coil frame so that the contact surfaces face each other with a predetermined gap, and a permanent magnet disposed on the opposite surface of the contact surface of each fixed contact; It has a long plate shape, most of which is located inside the cylindrical part of the coil frame, the base end is supported by a lead support spring within the other flange of the coil frame, and the other end is arranged so that it alternately approaches and separates from the contact surfaces of both fixed contacts. A reed relay comprising a lead made of a magnetic material and a yoke attached to a coil frame to magnetically couple the proximal end of the lead to each fixed contact,
The yoke is formed into a substantially rectangular shape surrounding the coil frame and the lead so as to face the permanent magnet and the base end of the lead, and the base of the lead is formed at a location facing perpendicularly to the base end surface of the lead. It has a configuration with an opening that allows edge adjustment.

[0011]

[Function] According to this configuration, since the yoke has a substantially square shape that surrounds the coil frame and the lead so as to face the permanent magnet and the base end of the lead, leakage of magnetic flux is small, and the yoke is Even when it is attached to the frame, adjustments such as matching the suction force characteristics and spring load characteristics can be made by inserting an adjustment jig through the opening of the yoke.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. Note that members having the same basic functions as those of the conventional example described above are given the same reference numerals.

Reference numeral 1 denotes a coil frame having a cylindrical portion 1a and flanges 1b and 1c on both sides thereof. Specifically, this coil frame 1 is constructed by joining together two coil frame halves 2 and 3 that are divided vertically in the figure, and also includes a cylindrical portion 1a and flanges 1b and 1c on both sides thereof. formed by their combination. In addition, a space Sb is provided inside one of the flanges 1b to house a fixed contact and a permanent magnet, and in which the other end of the lead can operate.
and, inside the other collar portion 1c, there is a space Sc in which the base end of the lead can be accommodated with sufficient clearance from the coil frame 1. Each of the coil frame halves 2, 3 has first recesses 2a, 3a and second recesses 2b, 3b extending in the axial direction formed in a superimposed manner on the upper and lower surfaces of a portion constituting one flange 1b. There is. The first recesses 2a, 3a are the coil frame 1
It is located at the center of the flange 1b and extends approximately 2/3 from the end surface of the flange 1b. The second recesses 2b, 3b are located on the outer side of the first recesses 2a, 3a, and are formed over the entire collar portion 1b. And the first recesses 2a, 3a are
The second recesses 2b and 3b are deeper in depth and narrower in width. In addition, the lower coil frame half 3 has inclined surfaces 3f, 3f with chamfered lower ends when viewed from the side.
It becomes. Furthermore, third recesses 2c, 3c corresponding to the second recesses 2b, 3b are formed on the upper and lower surfaces of the other flange 1c. Further, the outer end face of one of the flange parts 1b has vertical grooves 2d, 3d having the same width as the first recesses 2a, 3a, and the outer end face of the other flange part 1c has second recesses 2b, 3b and grooves 2d, 3d. Vertical grooves 2e and 3e having the same width as the three recesses 2c and 3c are formed, respectively. Note that the vertical groove 2e is slightly deeper than the vertical groove 3e. The coil frame halves 2 and 3 are joined by welding by local heating, bonding with an adhesive, etc. by fitting the joining portions into concave and convex portions.

4 is a coil, and the cylindrical portion 1a of the coil frame 1
wrapped around. Fixed contacts 5 and 6 are made of a magnetic material and have a substantially rectangular parallelepiped shape, with opposing surfaces projecting in a curved manner and conductive plating applied thereto to form contact surfaces 5c and 6d. These fixed contacts 5 and 6 have contact surfaces 5c and 6d.
Together with a permanent magnet, which will be described later, they are simultaneously molded inside one of the flange portions 1b so as to have a predetermined gap therebetween.

7 and 8 are permanent magnets, and fixed contacts 5 and 6
It has a slightly smaller rectangular parallelepiped shape, is magnetized in the vertical direction, and is brought into contact with the opposite surface of the contact surfaces 5c and 6d of each of the fixed contacts 5 and 6, and is attached to the inside of one of the flange portions 1b along with each of the fixed contacts 5 and 6. It is placed by simultaneous molding.

Reference numeral 9 denotes a lead, which is made of a magnetic material and has a flat long plate shape, most of which is located inside the cylindrical portion 1a, and the base end 9.
a is supported by a lead support spring, which will be described later, within the space Sc. The other end 9b is twin-shaped and has conductive plating on both sides to form contact surfaces 9c and 9d, and is placed in the space Sb so that it can alternately contact and separate from the contact surfaces 5c and 6d of the fixed contacts 5 and 6. positioned.

Reference numeral 15 denotes a lead support spring, which is made of an elastic magnetic plate and has a length L consisting of a long piece 15a and a short piece 15b.
Both ends of the long piece 15a are molded simultaneously with the other flange 1c of the coil frame 1 so as to be buried therein, and the long piece 15a exposed from the flange 1c is located within the space Sc. Lead 9 is attached to the middle part of long piece 15a.
It supports (fixes) the base end 9a of. This long piece 15
The middle part of a is wide so that welding etc. can be easily performed. As a result, the lead 9 is supported by the lead support spring 15 and can swing.

Reference numeral 10 denotes a yoke, which includes permanent magnets 7 and 10 in order to magnetically couple the base end 9a side of the lead and each of the fixed contacts 5 and 6.
It is formed in a substantially square shape surrounding the coil frame 1 and the leads 9 so as to face the base ends 9a of the leads 8 and 8. The yoke 10 of this embodiment includes three yoke pieces 11, 12, 13.
It is made up of. The first yoke piece 11 includes opposing pieces 11a and 11b that are superimposed on all fixed contacts 5 and 6 and permanent magnets 7 and 8, and a connecting piece 1 that connects these pieces.
It is formed in a U-shape at 1c. In other words, the facing piece 11a,
11b is the first recess 2a, 3a of the coil frame half body 2, 3
Then, the connecting pieces 11c are attached to the vertical grooves 2d and 3d. The second yoke piece 12 includes a long piece 12a that extends in the longitudinal direction of the coil frame 1 and whose end comes into contact with one opposing piece 11a of the first yoke piece 11, and a short piece 12b that faces the base end 9a of the lead 9. , are formed in a U-shape by a connecting piece 12c that connects them. In other words, the long piece 12a is inserted into the second recess 2b and the third recess 2c of the coil frame half 2, and the connecting piece 12c
is attached to the vertical groove 2e. The third yoke piece 13 includes a long piece 13a that extends in the longitudinal direction of the coil frame 1 and whose end abuts on the other opposing piece 11b of the first yoke piece 11, and a second yoke piece 12.
It is formed into an L-shape with a short piece 13b that comes into contact with a connecting piece 12c. In other words, the long piece 13a is the coil frame half 3
A short piece 13b is attached to the vertical groove 3e in the second recess 3b and third recess 3c. Further, in a portion perpendicularly facing the end surface of the proximal end 9a of the lead 9, that is, in the corresponding portion of the short piece 13b, there is an opening 13 that allows the proximal end of the lead 9 to be adjusted.
d is formed. This opening 13d may be a through hole as shown in FIG. 5, or may be a hole cut out from the tip as shown in FIG. 6, as long as the adjustment jig can be inserted therein. Note that the first yoke piece 11 is thicker than the second yoke piece 12 and the third yoke piece 13.

Reference numeral 21 denotes a base, which includes a lead terminal 16a, an upper fixed contact terminal 16b, a lower fixed contact terminal 16c,
The coil terminals 17, 17 are simultaneously molded and supported at a predetermined pitch. The lead terminal 16a is the support part 15 of the lead support spring 15.
The fixed contact terminals 16b and 16c are directly connected to the fixed contacts 5 and 6. Therefore, each of the above members is attached to the base 2.
1. A cover 22 is filled with thermoplastic resin so as to seal each member together with the base 21. When the cover 22 is filled with thermoplastic resin in this way, the third yoke piece 1 is inserted after the base end adjustment of the lead 9 is completed.
A slightly thicker film 13e is pasted on the opening 13d of No. 3 to close it.

Permanent magnet 7 in such a reed relay,
The magnetic flux of 8 is as follows: Permanent magnet 7 → Upper fixed contact 5 → Predetermined gap (including the other end 9b of lead 9) → Lower fixed contact 6 → Permanent magnet 8 → First yoke piece 11 → Permanent magnet 7
Permanent magnet 8 -> Opposing piece 11b of the first yoke -> Long piece 13a of the third yoke -> Short piece 13b
→ Connecting piece 12c of second yoke piece → Short piece 12b → Base end 9a of lead → Lead 9 → Other end of lead 9b → Lower fixed contact 6 → Permanent magnet 8 and permanent magnet 7 → Upper fixed contact 5 → Lead 9 → Proximal end of lead 9
a → short piece 12b of second yoke → connecting piece 12c → long piece 12a → opposing piece 11a of first yoke → permanent magnet 7
They each flow to the third path. Therefore coil 4
When not energizing, connect the lead 9 to the fixed contact 5 or 6 which has the larger magnetic flux in the second path or the third path.
is attracted and comes into contact with it. Lead 9 from this state
When contacting the fixed contact 6 or 5 on the opposite side, the coil 4 is energized so that magnetic flux flows in a direction that cancels the magnetic flux of the permanent magnets 7 and 8.

Although the cover in this embodiment is filled with thermoplastic resin, it is of course possible to use a general box-shaped cover. In addition, the yoke is explained as being composed of three yoke pieces, but as proposed earlier, it is composed of two yoke pieces, or there is no short piece of the second yoke piece. There may be.

[0022]

Effects of the Invention The reed relay of the present invention has a substantially rectangular shape in which the yoke surrounds the coil frame and the lead so that it faces the permanent magnet and the base end of the lead, so leakage of magnetic flux is reduced and the magnetic flux is reduced. Not only is efficiency improved, but even when the yoke is attached to the coil frame, an adjustment jig can be inserted through the opening of the yoke to match the attraction force characteristics and the spring load characteristics.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is a sectional view taken along line BB in FIG. 2;

FIG. 4 is a sectional view taken along line CC in FIG. 2;

FIG. 5 is a side view with the cover removed.

FIG. 6 is a side view showing a different example of the opening of the yoke.

FIG. 7 is a perspective view of a main part of a conventional example.

FIG. 8 is a perspective view showing only the members forming the magnetic path.

FIG. 9 is an exploded perspective view of the main part thereof.

FIG. 10 is a perspective view of a main part of a device previously proposed by the applicant.

FIG. 11 is a perspective view of the main parts of the device with the yoke and insulating substrate omitted.

FIG. 12 is an exploded perspective view of the main part thereof.

[Explanation of symbols]

1 Coil frame 2 Upper coil frame half 3 Lower coil frame half 4 Coil 5, 6 Fixed contact 7,8 Permanent magnet 9 Lead 10 Yoke 11 First yoke piece 12 Second yoke piece 13 Third yoke piece 13d Opening of third yoke piece 15 Lead support spring

Claims (1)

[Claims] Claim 1: A coil frame having a cylindrical portion and flanges on both sides thereof, a coil wound around the cylindrical portion of the coil frame, and one flange of the coil frame such that the contact surfaces thereof face each other with a predetermined gap. A fixed contact made of a magnetic material is disposed on the base of the coil frame, and a permanent magnet is disposed on the opposite side of the contact surface of each fixed contact. is supported by a lead support spring within the other flange of the coil frame, and the lead is made of a magnetic material and is arranged so that the other end alternately contacts and separates from the contact surfaces of both fixed contacts, and the proximal end of the lead and each fixed contact. A reed relay that includes a yoke attached to a coil frame to magnetically couple the contacts, the yoke surrounding the coil frame and the lead so as to face the permanent magnet and the base end of the lead. 1. A reed relay characterized in that the reed relay is formed in a substantially square shape, and has an opening that allows adjustment of the proximal end of the lead at a location facing orthogonally to the proximal end surface of the lead.