JP2588560Y2 - Polarized relay - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seesaw armature type polarized relay.

[0002]

2. Description of the Related Art This type of polarized relay has the following configuration. First, the configuration of the entire polarized relay will be described with reference to FIGS. As shown in FIG. 3, the casing 1 is fitted in a box-shaped base 11 opened upward and a box-shaped opened downward so as to cover the outside of the side wall of the base 11 from above the base 11. And a cover 12.

The base 11 is a molded product of an insulating material such as a synthetic resin formed in a substantially rectangular parallelepiped, and has recesses having upper and inner surfaces opened at the center in the longitudinal direction on both side walls in the width direction. 13 are formed respectively. Each recess 1
The common terminals 21 face the bottom surfaces of the common terminals 2 and 3, respectively.
Reference numeral 1 denotes a conductive plate integrally formed with a common terminal piece 22 that is exposed to the outside of the side wall in the width direction of the base 11 and protrudes downward.

[0004] At four corners inside the base 11, ribs 14 are formed which run up and down and whose upper end is located below the upper surface of the base 11. On the upper surface of the rib 14, a fixed contact plate 24 having a fixed contact 23 on the upper surface overlaps, and the fixed contact plate 24 is integrated with a fixed terminal piece 25 which is exposed to the outside of the width direction side wall of the base 11 and protrudes downward. Formed of a conductive plate.

[0005] On both side walls in the longitudinal direction of the base 11, there are formed cutouts 15 which are open at the center in the width direction and open on the front and back of the side walls. A terminal coupling piece 26 is provided to project upward. The coil terminal coupling piece 26 is formed of a conductive plate integrally with a coil terminal piece 27 that is exposed to the outside of both side walls in the width direction of the base 11 and protrudes downward. As described above, the common terminal 21 and the common terminal piece 22, the fixed contact plate 24 and the fixed terminal piece 25, and the coil terminal coupling piece 26 and the coil terminal piece 27 are formed integrally with the conductive plate, respectively. The plate and the plate are integrated by insert molding.

The conductive plate is routed in the side wall of the base 11 so that the conductive plate is provided over substantially the entire length of the side wall of the base 11. Therefore, the side wall of the base 11 is reinforced by the conductive plate, and the base 11 is box-shaped, so that the strength is increased. The cover 12 is a molded product of an insulating material such as a synthetic resin formed in a substantially rectangular parallelepiped like the base 11, and has four partitioning pieces 16 projecting downward from the inner peripheral surface of the upper wall. ing. The partition 16 is formed along the longitudinal direction of the cover 12.

[0007] A coil block 3, a magnet block 4, and an armature block 5 are disposed in a casing 1 formed by a base 11 and a cover 12. As shown in FIG. 4, the coil block 3 has a coil 32 wound around a lateral piece of a substantially U-shaped iron core 31 opened upward, and a leg in which the leg of the iron core 31 is formed of an insulating material. It is formed in a shape that is covered with 33 and has a tip end portion of the leg piece exposed at one location on the peripheral surface of the flange 33. A pair of coil terminals 34 connected to the coil 32 are provided corresponding to the respective flanges 33, and are bent so as to protrude above the upper ends of the flanges 33 and abut on the coil terminal coupling pieces 26.

[0008] With the coil block 3 housed in the base 11, the coil terminals 34 and the coil terminal coupling pieces 26 are electrically and mechanically coupled by a method such as welding or soldering. The magnet block 4 is interposed between the exposed portions of the leg pieces of the iron core 31 in such a manner that the magnetic poles abut. The permanent magnet 4 located above the coil 32 is plate-shaped, and has a concave groove 41 having a substantially semicircular cross section running in the width direction of the base 11 formed at the center of the upper surface. The upper surface of the permanent magnet 4 is an inclined surface 42 that is the largest at the center in the longitudinal direction of the base 11 and that is inclined such that the thickness gradually decreases toward the end. The fulcrum portion 54 of the armature block 5 is swingably supported by the concave groove 41 of the permanent magnet 4.

Further, both ends of the permanent magnet 4 in the longitudinal direction of the base 11 are magnetized to the same polarity, and the center is magnetized to different magnetic poles. That is, if both ends are N poles, the center is magnetized so as to be S poles. Then, the magnetic poles at both ends are interposed between the two legs in such a manner that the magnetic poles contact the inner surfaces of the legs of the iron core 31 of the coil block 3.

The armature block 5 includes a magnetic armature 51 formed in a substantially rectangular flat plate shape, and movable contact springs disposed on substantially the same plane as the armature 51 on both sides in the width direction of the armature 51. Piece 52, armature 51 and movable contact spring piece 5
2 and a spring support 53 which is a molded product of an insulating material such as a synthetic resin integrally molded. As shown in FIG. 5, on the lower surface of the armature 51, the armature 5
A fulcrum portion 5 having a substantially semicircular cross section formed on a ridge in the width direction of 1.
4 are formed.

The movable contact spring piece 52 is an elongated conductive leaf spring and has a support piece 5 which is a hinge spring having a substantially T-shaped tip at the center in the longitudinal direction.
5 are integrally provided. In addition, slits 56 each having a distal end opening are formed at both ends in the longitudinal direction, the distal end of the movable contact spring piece 52 is formed in a bifurcated shape, and the movable contact corresponding to the fixed contact 23 is welded to the lower surface of each distal piece. It is fixed at.

Notches 57 are formed in the spring support 53 at both ends in the width direction of the armature 51. A support piece 55 protrudes from the inner end of the notch 57, and the support piece 5
5 has a spring support 5 in the width direction of the armature 51.
It protrudes outward beyond 3. That is, the movable contact spring piece 52 is fixed at the center in the longitudinal direction by the spring support 53, and the support piece 55 projects from the spring support 53. , And the support piece 55 independently exerts a spring force.

In the armature block 5, a fulcrum 54 provided on the lower surface of the armature 51 is accommodated in the concave groove 41 of the permanent magnet 4, and a support piece 55 is provided on the side wall of the base 11.
3, the armature block 5 is disposed at a fixed position in the base 11, and the armature block 5
It becomes swingable about the axis. As described above, the cover 12 is fitted to the base 11 in a state where the coil block 3, the permanent magnet 4, and the armature block 5 are stored in the base 11. The four partitioning pieces 16 protruding from the inner peripheral surface of the cover 12 are inserted into gaps between the armature 51 and the movable contact spring piece 52 with the cover 12 fitted on the base 11, respectively. Pole 51 and movable contact spring piece 5
The insulating partition 16 is interposed between the first and second members so that the insulation distance between the two can be increased.

With the above configuration, when the coil 32 is energized, one end in the longitudinal direction of the armature 51 is attracted to one leg of the iron core 31 in accordance with the direction of magnetization, and the armature block 5
Swings, iron core 31 → armature 51 → permanent magnet 4 → iron core 3
One closed magnetic path is formed, and one end in the longitudinal direction of the movable contact spring piece 52 contacts the corresponding fixed contact 23. When energization of the coil 32 is stopped in this state, the above-mentioned closed magnetic circuit is maintained as it is by the magnetic force of the permanent magnet 4, and the state where the armature 51 is in contact with one of the iron cores 31 is maintained.

If the direction of current supply to the coil 32 is reversed, the armature 51 is attracted to the other leg of the iron core 31, and the other end of the movable contact spring piece 52 in the longitudinal direction corresponds to the fixed end. It contacts the contact 23. Even in this state, the state is maintained as it is after the power supply is stopped, so that a so-called bistable operation can be performed. By the way, the above-mentioned polarized relay is a so-called BBM (Break
In the case where this polarized relay is formed as an MBB (Make Before Break) contact configuration, the movable contact spring piece 52 has an OT (Over Travel) contact configuration.
) Just increase the amount. FIG. 6 shows a characteristic diagram of a suction force and a stroke of a conventional BBM contact configuration. (A) shows the suction force characteristic, and (C) shows the combined spring load characteristic of the movable contact spring piece 52 and the support piece 55, respectively. In this configuration, simply increasing the OT amount of the movable contact spring piece 52 makes it impossible to match the suction force curve shown in FIG. 7 with the spring load (X, Y in FIG. 7).

FIG. 9 is a sectional view of the relay, in which the stroke A is defined as the distance between the magnetic pole surface at the end of the iron core 31 and the lower surface at the end of the armature 51. By forming a curve, it is possible to match the suction force curve with the spring load as shown in FIG. Another method for matching the suction force curve with the spring load is to change the spring load stepwise as shown in the range a and b in FIG. Can be made possible.

Therefore, there is provided a polarized relay which can easily produce a BBM contact configuration to an MBB contact configuration (actually, there is provided a polarized relay).
No. 63-166930 (Japanese Utility Model Application No. 2-87356)
Microfilm) . 11 and 12, both ends of the armature 51 are connected to the core 3 through the step 58, respectively.
It is bent to one side. The movable contact spring piece 52 is also bent toward the iron core 31 and inclined. Therefore, the armature 5
1 and the bending of the movable contact spring piece 52, as shown in FIG.
In this case, the stroke A 'between the magnetic pole surface and the magnetic pole surface is shortened to match the attraction force curve with the spring load as shown in FIG. Accordingly, it is possible to easily form the BBM contact configuration to the MBB contact configuration only by bending the armature 51.

[0018]

SUMMARY OF THE INVENTION The conventional transfer type electromagnetic relay operable in MBB described in the above publication is disclosed .
In this case, the movable contact spring piece 52 is bent toward the iron core 31 side.
However, the movable contact
There has been a problem that the dimensions of the contact spring pieces 52 are not stable and it is difficult to produce them.

The present invention has been made in view of the above-mentioned points, and has been made in consideration of the above problem.
Polarized that can easily create MBB contact configuration from M contact configuration
It is intended to provide a relay.

[0020]

According to the present invention, a permanent magnet interposed between magnetic poles of an iron core around which a coil is wound, and a fulcrum at a substantially central portion of an upper surface of the permanent magnet located above the coil.
Each end portion faces the pole faces of the two ends the upper surface of the swingably pivoted to the iron core to the right and left around the fulcrum portion, one in a normal state
An armature whose one end is attracted to the opposing magnetic pole surface, a movable contact spring piece integrally projecting from both sides of the armature from the center of the side of the armature, and a lower surface of the movable contact spring piece Movable contact and a fixed contact facing the movable contact, and the state of attraction between one end of the armature and one magnetic pole surface of the iron core is determined.
Between the other end of the armature and the other pole face of the iron core
By energizing the coil to generate an attractive force
In the case of a polarized relay in which the armature is swung to open and close the movable contact and the fixed contact with the movable contact spring piece ,
The movable contact and one of the fixed contacts
And the other movable contact and the other fixed contact
When the points are far apart, both contacts are facing each other.
Contact with one of the movable contacts
One fixed contact facing away from the
If the movable contact and the other fixed contact
Armature is formed to swing freely so that
And both movable contacts make contact with the opposite fixed contact, respectively.
Between the armature and the pole face of the iron core
The gap is formed and the armature moves through this gap.
One side is movable until it moves and is attracted to the magnetic pole surface of the iron core.
So that the contact and one of the opposed fixed contacts are separated,
Set the contact position and gap size between the movable contact and fixed contact
It was done.

Further, the movable contact spring piece is provided on the lower surface of the armature.

[0022]

[Operation] One movable contact and one opposed to the other
The fixed contact is in contact and the other movable contact is
From the state where the other fixed contact opposite to
Contacts the fixed contacts facing each other.
One movable contact and one fixed contact facing it
The other movable contact that is away from the other movable contact
Contact so that the fixed contact of
The poles are formed to swing freely, and both movable contacts are
Armature iron Te state odor in contact respectively with a constant contact
A gap of a predetermined size is formed between the pole faces of the core and
The armature moves through this gap and is attracted to the magnetic pole surface of the iron core
One movable contact and one fixed opposite
Make sure that the contact points between the movable and fixed contacts
And the size of the gap are set, so the movable contact spring piece is bent.
BBM contact configuration to MBB contact configuration without processing
Can be easily produced .

Also, the movable contact spring piece is provided on the lower surface of the armature, and the movable contact spring piece itself or the movable contact spring piece is lightly embossed to perform a MBB operation as a movable contact.
Can you to the.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Since the configuration of the entire polarized relay is almost the same,
The summary will be described. In FIG. 1, the position of the permanent magnet 4 is arranged below the
1, the fulcrum 54 of the armature 51 is swingably fitted, and the rotation fulcrum position P of the armature 51 is lowered below the height position of the magnetic pole surface 35 of the iron core 31 and the mounting position of the fixed contact 23. It is located.

Further, the tip of the movable contact spring piece 52 is lightly stamped to form a movable contact 59 facing the fixed contact 23. Note that the movable contact 59 may be the tip itself of the movable contact spring piece 52. Further, the movable contact spring piece 52 is attached and arranged on the lower surface of the armature 51. Here, FIG.
As shown in the figure, the dimension Ho between the rotation fulcrum position P and the mounting position of the fixed contact 23 is Ho> 0, and the mounting position of the fixed contact 23 and the dimension Ho ′ of the magnetic pole surface 35 of the iron core 31 are H
o '> 0. The dimension H between the rotation fulcrum position P when the contact points 23 and 59 on both sides are in contact with each other and the armature 51 is in an equilibrium state and the lower surface of the armature 51 that is the magnetic pole surface.
and c, the relationship between the height Hc ₁ height Hc ₂ and the movable contact 59 of the fixed contact 23 is in the Hc> Hc ₁ + Hc _2.

The polarized relay formed as described above is MB
B operation is possible. That is, one movable contact 59 is
And one of the opposed fixed contacts 23 is in contact with
The other movable contact 59 and the other fixed contact 2 opposed thereto
3 and one end of the armature 51 and the iron core
31 is repelled from the attraction state with one of the magnetic pole surfaces 35, and
Between the other end of the armature 51 and the other pole face 35 of the iron core 31.
When the coil 32 is excited to generate an attractive force, the armature
51 is swung so that both movable contacts 59 and 59 are opposed to each other.
It comes into a state of being in contact with the constant contacts 23, 23, respectively.
At this time, between the armature 51 and the magnetic pole surface 35 of the iron core 31.
Has a gap of a predetermined size. After this, the gap is tangent
Until the armature 51 moves and is attracted to the magnetic pole surface 35 of the iron core 31.
Between one movable contact 59 and one fixed contact opposing it.
The constant contact 23 is separated. Moreover, the dimensions
Movable contact spring formed by stable stamping
It is necessary to bend the piece 52 so that the dimensions are not stable.
And improves the contact stability between the movable contact 59 and the fixed contact 23
And perform reliable MBB operation
It is possible to make it.

Further, in the prior art, the movable contact was provided on the movable contact spring piece 52 by welding. However, as in the present embodiment, the movable contact 59 is lightly stamped out or formed in the shape of the movable contact spring piece 52 itself. Even in this case, the MBB operation can be performed, and the movable contact can be configured without welding, thereby streamlining the operation. By the way, in a sealed relay in which an adhesive is used at the time of the secondary sealing, the adhesive is applied to the secondary sealing hole as it is (or the area around the hole is roughened with a soldering iron) and sealed. However, in this case, the sealing strength of the secondary sealing is not sufficient.

Therefore, in this embodiment, as shown in FIG.
The secondary sealing hole 8 is not a straight cylinder but a tapered screw-shaped shape, and the tapered surface is irradiated with a light beam or a laser to roughen the tapered surface and apply an adhesive 9. And seal it. Therefore, the tapered surface of the secondary sealing hole 2 can be easily roughened from the point that the roughened surface is tapered and the point that a light beam or the like is used, and the bonding on the exposed surface is facilitated. Therefore, sufficient adhesive strength (sealing strength) can be obtained.

[0029]

[Effect of the Invention] As described above, the present invention provides one movable contact.
And one of the fixed contacts facing it is in contact with
The other movable contact is separated from the other fixed contact
From the state where both contacts are facing each other.
After moving into contact with a point, one movable contact is opposed to this
One fixed contact is separated and the other movable contact
Into contact with the other fixed contact facing it
The armature is formed to be swingable so that
Movable contacts are in contact with opposed fixed contacts
Space between the armature and the pole face of the iron core
A gap is formed and the armature moves through this gap,
One movable contact and this
And the movable contact so that one of the fixed contacts facing
Since the contact position of the fixed contact and the size of the gap are set,
BBM contact structure without bending the movable contact spring piece
An MBB contact configuration can be easily produced from the result .

Further, the movable contact spring piece is provided on the lower surface of the armature, and the movable contact spring piece itself or the movable contact spring piece is lightly embossed to perform the MBB operation as a movable contact.
Is what can you to the.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram in the case of performing secondary sealing.

FIG. 3 is an exploded perspective view of the entire conventional relay.

FIG. 4 is a sectional view.

FIG. 5 is a perspective view of the armature block as viewed from the back.

FIG. 6 is a characteristic diagram showing a relationship between a suction force and a stroke.

FIG. 7 is a characteristic diagram showing a case where there is a mismatch between a suction force curve and a spring load.

FIG. 8 is a characteristic diagram showing a state in which matching is possible.

FIG. 9 is a sectional view of a relay.

FIG. 10 is a diagram showing spring load characteristics.

FIG. 11 is a cross-sectional view of a conventional example of the MBB type.

FIG. 12 is a perspective view of the armature block as viewed from the back.

[Explanation of symbols]

 Reference Signs List 4 permanent magnet 23 fixed contact 31 iron core 32 coil 35 magnetic pole surface 51 armature 52 movable contact spring piece 59 movable contact

Claims (2)

(57) [Scope of request for utility model registration] And 1. A permanent magnet interposed between the magnetic poles of the iron core wound with a coil, the left and right around the fulcrum portion by a fulcrum portion of the substantially central portion of the upper surface of the permanent magnet located above the coil
Each end pole face across the top surface of the swingably pivoted to the core faces, one end in a normal state is opposed to the pole faces
Armature that is attracted to the armature, a movable contact spring piece integrally projecting from both sides of the armature at the center of the side, a movable contact formed on the lower surface of the movable contact spring, and the movable contact And one end of the armature and one end of the iron core.
Repels the state of adsorption to the magnetic pole face, and the other end of the armature and iron
Coil so that an attractive force is generated between it and the other pole face of the core.
In polarized relay which is adapted to open and close the movable contacts and the fixed contacts at to oscillate the armature and movable contact spring piece by exciting the Le one facing the therewith one movable contact
One fixed contact is in contact with the other movable contact
From the state where the other fixed contact facing
State that one of the contacts contacts the opposite fixed contact.
Through one movable contact and one fixed contact facing it
Are separated and the other movable contact and the other
So that one of the fixed contacts is in contact with the other,
The armature is formed to swing freely, and both movable contacts face each other
In the state where they are in contact with the fixed contacts,
When a gap of a predetermined size is formed between the pole faces of the iron core,
The armature moves through this gap and is attracted to the magnetic pole face of the iron core.
One movable contact and one fixed
Contact position of movable contact and fixed contact so that constant contact is separated
A polarized relay characterized in that the size of the gap is set . 2. The polarized relay according to claim 1, wherein a movable contact spring piece is provided on a lower surface of the armature.