JPH04363832A - Lead relay - Google Patents

Abstract

PURPOSE:To prevent an external force acting on a lead terminal from being directly transferred to a lead by using an elastic magnetic material to form a lead support spring in such a way as having a lead base end support section and a magnetism collection section faced to the vicinity of a yoke lead base end, and bearing a part of the support section with the collar of a coil frame. CONSTITUTION:A lead support spring 15 is made of an elastic magnetic material and so bent that a support section 15a for a lead base end is approximately orthogonal with a magnetism collection section 15b faced to the vicinity of a yoke lead base end. The support section 15a is made sufficiently larger than the breadth of space Sc, and a part thereof is concurrently molded and supported with a collar 1c at one side of a coil frame. Namely, one end of the support section 15a for connection to a lead terminal is projected from the collar 1c at the other side. Also, the part of the support section 15a in the space Sc is made wide for the easy support of the base end 9a of a lead 9 via welding or the like.

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. 5.
The configurations shown in FIGS. 7 to 7 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 have the configuration shown in FIGS. 8 to 10, in which 1 is a coil frame, 4 is a coil, 5 is
6 is a fixed contact, 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;
14 is an insulating substrate, 16 is a contact terminal group, and 17 is a coil terminal group. The other end 9b of the lead 9 is provided with a contact surface.
It is integrally formed from the terminal portion 9e to the terminal portion 9e. This thing is
The permanent magnets 7, 8 are connected to the contact surfaces 5c of the fixed contacts 5, 6,
By arranging the lead 9 on the opposite side of the lead 9b and 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. Since the terminal portion 9e is integrally formed, there are problems in terms of strength and manufacturing.

That is, when a large external force is applied to the terminal portion 9e of the lead 9, the position of the other end 9b, that is, the contact surface may change, or the coil frame 1 may change due to the bent shape.
It is difficult to position the other end 9b when fixing it to the contact surface, and it is also difficult to adjust the other end after fixing, that is, to adjust the position of the contact surface. From this point of view, it can be said that the structure of the conventional example described earlier is good, but the conventional structure requires a separate component called an insulating board, and the area facing the yoke cannot be made large, resulting in poor magnetic efficiency. The problem remains that there is no.

The present invention is a further improvement on the previously proposed one, and its purpose is to provide a reed relay with improved magnetic efficiency and reduced problems in terms of lead strength and manufacturing. There is something to do.

[0011]

[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 the lead support spring, and the other end is made of magnetic material and is arranged so that it alternately contacts and separates from the contact surfaces of both fixed contacts. In a reed relay that includes a lead and a yoke that magnetically couples the base end of the lead to each fixed contact, the support lead support spring is connected to the support portion of the base end of the lead by an elastic magnetic plate. and a magnetic collecting part facing the vicinity of the lead base end of the yoke, and a part of the supporting part is supported by the other flange of the coil frame.

[0012] Furthermore, it is preferable that a through hole is formed in the magnetism collecting portion of the lead support spring.

[0013]

[Function] According to this configuration, the magnetic collecting part of the reed support spring faces the yoke over a wide area, increasing magnetic efficiency, and the reed support spring supported by the coil frame and the reed supported by the base etc. Since the terminals are bonded to each other, even if an external force is applied to the lead terminals, it is not directly transmitted to the leads, and since the leads themselves are flat, there are few processing errors, so it is easy to achieve positional accuracy of the contact surfaces. Further, if a through hole is formed in the magnetic flux collecting portion of the lead support spring, the position of the contact surface can be easily adjusted when necessary.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. 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 is bent so that a support part 15a at the base end of the lead and a magnetic flux collecting part 15b facing the vicinity of the lead base end of the yoke are substantially perpendicular to each other. Ru. This support portion 15a is sufficiently longer than the width of the space Sc, and therefore a portion thereof is supported by the other flange portion 1c of the coil frame by simultaneous molding. More specifically, one end of the support portion 15a is made to protrude from the other flange portion 1c in order to be connected to the lead terminal. Also, the support part 15
The portion a located within the space Sc is wide so that the base end 9a of the lead 9 can be easily supported (fixed) by welding or the like. The lead 9 has a base end 9a
is supported by the support portion 15a, so that it can swing. Further, the magnetic flux collecting portion 15b is bent from the edge of the wide portion of the support portion 15a, and a through hole 15c is formed in the center of the base side. This through hole 15
c is used when gripping the base end 9a with an adjustment jig when adjusting the position of the other end 9b of the lead 9, that is, the contact surface.

Reference numeral 10 denotes a yoke, which includes three yoke pieces 1 to magnetically couple the base end 9a side of the lead and each fixed contact 5, 6.
Consists of 1, 12, and 13. The first yoke piece 11 is formed in a U-shape by opposing pieces 11a, 11b that are superimposed on all the fixed contacts 5, 6 and permanent magnets 7, 8, and a connecting piece 11c that connects them. In other words, the facing pieces 11a, 11b are placed in the first recesses 2a, 3a of the coil frame halves 2, 3, and the connecting pieces 11c are placed in the vertical grooves 2d, 3d.
be inserted into. The second yoke piece 12 extends in the longitudinal direction of the coil frame 1 and has an end that is one of the opposing pieces 1 of the first yoke piece 11.
The long piece 12a that comes into contact with 1a and the short piece 12b make L
Formed in a letter shape. That is, the long pieces 12a are fitted into the second and third recesses 2b and 2c of the coil frame half 2, and the short pieces 12b are fitted into the vertical grooves 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 1.
The short piece 13b contacts the second short piece 12b, forming an L-shape. In other words, the long piece 13a is the coil frame half 3
The short piece 13b is fitted into the vertical groove 3e in the second recess 3b and third recess 3c. The magnetism collecting portion 15b of the lead support spring 15 mentioned above faces this short piece 13b over a wide area. The first yoke piece 11 of this embodiment 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.

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
→Lead support spring 15→Lead base end 9a→Lead 9
→ Other end of lead 9b → Lower fixed contact 6 → Permanent magnet 8
and the permanent magnet 7 → upper fixed contact 5
→ Lead 9 → Lead support spring 15 → Short piece 13b of third yoke → Short piece 12b of second yoke → Long piece 12a →
Each flows through a third path from the opposing piece 11a of the first yoke piece to the permanent magnet 7. Therefore, when the coil 4 is not energized, the fixed contact 5 or 6 which has the larger magnetic flux in the second path or the third path
Lead 9 is attracted to it and comes into contact with it. When the lead 9 is brought into contact with the fixed contact 6 or 5 on the opposite side from this state, 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.

Although the cover in this embodiment is filled with thermoplastic resin, it is of course possible to use a general box-shaped cover.

[0024]

[Effects of the Invention] In the reed relay of the present invention, the magnetism collection part of the reed support spring has a large area facing the yoke, increasing magnetic efficiency, and is supported by the reed support spring supported by the coil frame and the base etc. Since the lead terminals are joined together, even if an external force is applied to the lead terminals, it will not be directly transmitted to the leads, and since the leads themselves are flat, there will be little processing error, making it easier to achieve positional accuracy on the contact surfaces. In addition, by forming a through hole in the magnetic collecting part of the lead support spring, it becomes easier to adjust the position of the contact surface when necessary, which increases magnetic efficiency and improves lead strength and manufacturing. This will alleviate the problem.

[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 perspective view of main parts showing a conventional example.

FIG. 6 is a perspective view showing only the members forming the magnetic path.

FIG. 7 is an exploded perspective view of the main part thereof.

FIG. 8 is a perspective view of a main part of a device previously proposed by the applicant.

FIG. 9 is a perspective view of the main parts of the device with the yoke and insulating substrate omitted.

FIG. 10 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 15 Lead support spring 15a Support part 15b Magnetism collection part

Claims (2)

[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. A lead made of a magnetic material is supported by a lead support spring and the other end is arranged so as to alternately come into contact with and away from the contact surfaces of both fixed contacts, and the base end of the lead is magnetically coupled to each fixed contact. In the reed relay comprising a yoke, the reed support spring is made of an elastic magnetic plate and has a support portion at the base end of the lead and a magnetism collecting portion facing a portion near the base end of the lead of the yoke. A reed relay in which a part of the support part is supported by the other flange of the coil frame. 2. The reed relay according to claim 1, wherein a through hole is formed in the magnetic collecting portion of the reed support spring.