JP3133802B2 - 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 so-called balanced armature type polarized relay to which an armature is swingably mounted.

[0002]

2. Description of the Related Art As this type of polarized relay, for example,
A coil block in which a coil is wound around an iron core formed in a substantially U-shape, a permanent magnet interposed between both side pieces of the iron core, and both ends of the iron core are swingably disposed on the permanent magnet. There is a so-called balance armature type in which an armature opposing each side piece is provided, and a contact is opened and closed by swinging of the armature.

[0003]

By the way, in this type of conventional polarized relay, individual components are generally assembled and manufactured in a manufacturing process. For this reason, there has been a problem that it is difficult to manufacture a product of stable quality due to a variation in an assembly state of each component. There is also a problem that it is difficult to secure a withstand voltage (insulation state) between input and output.

The present invention has been made in view of the above points, and an object of the present invention is to provide a polarized relay having a stable quality and a high withstand voltage.

[0005]

According to the present invention, in order to achieve the above object, an iron core, a coil bobbin integrally formed with the iron core, a coil wound around the coil bobbin, and a magnetic pole piece of the iron core are provided. A body block in which a permanent magnet interposed in the body and a terminal including a fixed contact terminal to which the fixed contact is fixed are molded with an insulating material to be integrally formed;
Beauty, and armature is swingably mounted on the permanent magnet, armature or block which is integrally molded is molded by a contact spring toward and away from the movable contacts are formed on the fixed contact insulating material
The fixed contact of the fixed contact terminal is formed during molding.
Position the formed part between the molding die
Positioning protrusion for the flange of the coil bobbin
Things .

[0006]

[0007]

According to the present invention, there are provided an iron core, a coil bobbin integrally formed with the iron core, a coil wound around the coil bobbin, a permanent magnet interposed between magnetic pole pieces of the iron core, and By molding a terminal including a fixed contact terminal to which a contact is fixed with an insulating material and integrally molding it as a body block, it is possible to prevent a variation in an assembled state from occurring when individual members are individually assembled. Therefore, the position accuracy of the surface serving as the magnetic pole of the iron core, the upper surface of the permanent magnet on which the armature is swingably supported, and the fixed contact are increased, and the quality is stabilized. Further, armature blow armature is swingably mounted on the permanent magnet, and a contact spring toward and away from the movable contacts are formed on the fixed contact is molded with an insulating material
The contact spring and coil can be insulated because they are integrally molded as a hook , and the coil is embedded in the insulating material of the body block. The insulation is also provided during the period, so that the breakdown voltage between the input and the output is increased.

Further, the fixed contact terminal is fixed at the time of molding.
Position where the point where the contact is formed is sandwiched between the molding die
A positioning projection is provided on the collar of the coil bobbin
Therefore , the fixed contact portion is firmly fixed at the time of molding the body block, so that the fixed contact position does not shift due to the molding pressure, and the positional accuracy of the fixed contact is increased.

[0009]

1 to 3 show an embodiment of the present invention. In the polarized relay of this embodiment, the iron core 1 is formed in a substantially U-shape.
The iron core 1 is arranged with both side pieces facing upward. A coil bobbin 2 made of synthetic resin is integrally formed with the iron core 1. That is, the iron core 1 is insert-molded on the coil bobbin 2. Here, the tip portions of both side pieces 1 a serving as the magnetic poles of the iron core 1 are exposed from the coil bobbin 2. A coil 3 is wound around the body 2b of the coil bobbin 2. A connecting piece 21 for connecting both ends of the coil 3 and a fixing piece 22 integrated with the connecting piece 21 are implanted in each of the flanges 2a formed on both ends of the coil bobbin 2. . In addition, positioning protrusions 23 project from both sides of the iron core 1 on the upper surface of the flange portion 2a. Then, a rectangular parallelepiped permanent magnet 4 is attached between both side pieces 1a exposed from the coil bobbin 2 of the iron core 1. The permanent magnet 4 is magnetized with different polarities at the center and both ends.

The manufacturing process of each of the above members will be described. First, a coil bobbin 2 is manufactured by inserting an iron core 1 therein.
A coil 3 is wound around the coil bobbin 2 and then a permanent magnet 4 is attached to form a shape shown in FIG. In the following description, a member including the iron core 1, the coil bobbin 2, the coil 3, and the permanent magnet 4 is referred to as an electromagnet block.

The electromagnet block is molded with a synthetic resin together with the terminal 7 to form a body block 1 shown in FIG.
It is integrally formed as 1. The terminal 7 is fixed piece 7a of the fixed contact terminal ₇₁ to the fixed contact 9 to the base end is formed, the hinge spring piece 6a of the contact spring 6 to be described later to the proximal end is secured
A common contact terminal 7 ₂ but formed, a coil terminal 7 ₃ for performing energization of the coil 3, on both sides of the electromagnetic block, the two fixed contact terminals _71, one common contact terminals 7 ₂
And two coil terminals 7 ₃ are respectively implanted. here,
The proximal end portion of the coil terminal 7 ₃ flange portion 2 of the coil bobbin 2
A is connected by welding to the fixing piece 22 implanted in a.

By the way, as described above, the body block 1
When forming 1, the position of the fixed contact 9 may fluctuate due to the molding pressure applied to the terminal 7 during molding. Therefore, it is necessary to form the body block 11 while firmly holding the fixed contact 9 part. Conventionally, in order to position the fixed contact 9 part, the fixed contact 9 part was directly positioned by a mold. However, as in this embodiment, the electromagnet block and the terminal 7 are not used.
When the so-called simultaneous molding process is performed in which the electromagnet block is integrally molded with a synthetic resin, a space for accommodating a mold for holding the fixed contact 9 portion cannot be provided.

Therefore, in this embodiment, the positioning of the fixed contact 9 during molding is performed as follows. When molding the electromagnet block and the terminal 7 with a synthetic resin,
Positioning protrusion 23 formed on flange 2a of coil bobbin 2
Placing a base fixed contact terminal ₇₁ of the fixed contact 9 is formed in the upper, pinching and holding the base fixed contact 9 via a flange portion 2a is formed in the mold. By doing so, the position of the fixed contact 9 does not fluctuate due to the molding pressure.

[0014] The common contact terminals 7 ₂ may be positioned in a mold as in the prior art, the terminals 7 are molded in the state of FIG. 1 (b). Incidentally, the upper surface of the base portion of the common contact terminals 7 ₂ is molded so as to expose the upper surface of the body block 11. Then, after the formation, the portions exposed from the molded portions of the respective terminals 7 are bent downward. As described above, when the iron core 1, the permanent magnet 4, and the fixed contact 9 are integrally formed as a body block 11, a swinging surface on which an armature block 12 described later is swingably mounted, and both side pieces 1a of the iron core 1 are formed. The position accuracy of the magnetic pole surface, which is the upper surface, and the position of the fixed contact 9 can be increased. That is, when each member is individually assembled as in the related art, the swing surface, the magnetic pole surface, and the fixed contact 9 may vary due to the variation in the assembly state of each member.
However, if the body block 11 is integrally formed as in the present embodiment, the positional accuracy of the swing surface, the magnetic pole surface, and the fixed contact 9 can be easily increased. Therefore, the quality of the product is stabilized.

The armature 2 is disposed on the permanent magnet 4 of the body block 11. The armature 2 is formed in a flat plate shape, and is swingably mounted on the permanent magnet 4 as shown in FIG. 3 with a ridge 5a formed in the center of the lower surface as a swing fulcrum. A contact spring 6 is integrally attached to the armature 2. In the case of the present embodiment, since it is a two-circuit type polarized relay, two contact springs 6 are provided on both sides of the armature 2. A movable contact 8 is fixed to each of both ends of the contact spring 6, and a hinge spring piece 6a protrudes from one side of a central portion. The hinge spring piece 6a is fixed to the fixing piece 7a of the common contact terminal 7 _2, thereby the contact spring 6 is electrically connected to the common contact terminal 7 _2. The hinge spring piece 6a also has a function of applying a restoring force to the armature 2 by the twist generated when the armature 2 is attracted to one of the side pieces of the iron core 1.

In this embodiment, the armature 5 and the contact spring 6 are molded with a synthetic resin to form an armature block 12 integrally. The armature 5 and the contact spring 6 are insulated from each other by the molded portion 12a. In this way, it is possible to prevent the insulation distance between the contact spring 6 and the coil 3 via the armature 5 from being substantially reduced in the molding portion 12a, and to prevent the molding member of the body block 11 from being shortened. Since the coil 3 is buried in the inside, the insulation between the contact spring 6 and the coil 3 is provided even with the molded member of the body block 11, so that the input / output withstand voltage can be sufficiently ensured.

By the way, in the polarized relay of the present embodiment, as shown in FIG. 3A, the base end of the hinge spring piece 6a is extended from a position shifted from the center position of the armature block 12, and common contact terminal 7 _{and second} fixing piece 7a at the center position of the armature block 12 the tip of the spring pieces 6a
It is stuck to. In this way, the spring load of the hinge spring piece 6a becomes unbalanced at the center of the armature block 12, and the spring force of the hinge spring piece 6a attracts the armature 5 by the permanent magnet 4 to the magnetic pole surface of the iron core 1. If the magnetomotive force is larger than the magnetomotive force to be applied, the armature 5 can be returned to a constant state against the attraction force between the armature 5 by the permanent magnet 4 and the magnetic pole surface of the iron core 1. Therefore, the polarized relay operates monostable.

With the armature block 12 mounted and mounted on the permanent magnets 4 of the body block 11 as described above, the cover 12 shown in FIG. 2 is fitted. This cover 12
Has a box shape with an open lower surface, and a sealing portion 13a for sealing the inside is formed at one corner of the upper surface. The operation of the polarized relay of the above embodiment will be briefly described. In this polarized relay, in the stationary state in which the energization of the coil 3 is stopped, the end of the armature 5 on the side opposite to the side where the extension position of the hinge spring piece 6a is shifted by the magnetomotive force of the permanent magnet 4 is an iron core. 1
Is attracted to the magnetic pole surface.

When the coil 3 is energized so that the end on the side where the armature 5 is not attracted is attracted to the magnetic pole surface of the iron core 1, the end of the armature 5 is attracted to the iron core 1. The armature block 12 swings and the armature 5 becomes the side piece 1 of the iron core 1.
a. At this time, the movable contact 8 at one end of the contact spring 6 comes into contact with the fixed contact 9. This state is maintained while the coil 3 is energized.

When the power supply to the coil 3 is stopped,
With the spring force of the hinge spring piece 6a described above, the armature 5 is returned to a fixed state and rotated against the attraction force between the armature 5 by the permanent magnet 4 and the magnetic pole surface of the iron core 1. According to this embodiment, the extension position of the hinge spring piece 6a is set to the armature block 12
It is possible to produce a monostable polarized relay simply by changing the contact spring 6 to a bistable polarized relay because the pole relay can be operated monostable simply by displacing it from the center. Can be. In the case of a bistable type, the extension position of the hinge spring piece 6a may be set to the center of the armature block 12.

[0021]

As described above, the present invention relates to an iron core, a coil bobbin integrally formed with the iron core, a coil wound around the coil bobbin, and a permanent magnet interposed between the pole pieces of the iron core. Since the fixed contact and the terminal including the fixed contact terminal to which the fixed contact is fixed are molded with an insulating material and integrally formed as a body block, there is no variation in an assembled state as in the case of individually assembling each member, For this reason, it is possible to increase the positional accuracy of the surface serving as the magnetic pole of the iron core, the upper surface of the permanent magnet on which the armature is swingably supported, and the fixed contact, thereby stabilizing the quality. Also, since an armature slidably mounted on a permanent magnet and a contact spring formed with a movable contact that comes into contact with and separate from the fixed contact are molded with an insulating material and integrally formed as an armature block , The insulation between the contact spring and the coil can be provided, and since the coil is embedded in the body block, the insulation between the contact spring and the coil is also provided on the body block side, and therefore the withstand voltage between the input and output Can be higher.

Further , fixed contact terminals are fixed at the time of molding.
Position where the point where the contact is formed is sandwiched between the molding die
A positioning projection is provided on the collar of the coil bobbin
Therefore, the fixed contact portion can be firmly fixed at the time of molding the body block, the fixed contact position does not shift due to the molding pressure, and the positional accuracy of the fixed contact can be increased.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a manufacturing process of a body block according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view of the polarized relay according to the first embodiment.

3 (a) to 3 (d) are a horizontal sectional view, a vertical sectional view,
FIG. 2A is a cross-sectional view taken along the line AB, and FIG.
It is a line sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron core 2 Coil bobbin 3 Coil 4 Permanent magnet 5 Armature 6 Contact spring 7 Terminal 8 Movable contact 9 Fixed contact 11 Body block 12 Armature block

──────────────────────────────────────────────────の Continued on the front page (58) Surveyed fields (Int.Cl. ⁷ , DB name) H01H 50/02-50/04 H01H 50/14-50/18 H01H 50/36 H01H 50/44 H01H 50 / 56 H01H 51/22-51/24

Claims (1)

(57) [Claims] 1. An iron core, a coil bobbin integrally formed with the iron core, a coil wound around the coil bobbin,
A permanent magnet interposed between the pole pieces of the iron core, the body block and the terminal is molded integrally molded with an insulating material containing a stationary contact terminals fixed contact is secured, and, swinging on the permanent magnet The armature block is composed of an armature block in which an armature that can be freely mounted and a contact spring that has a movable contact that comes in contact with and separates from the fixed contact are molded with an insulating material and integrally molded.
The fixed contact of the fixed contact terminal is formed during molding.
For positioning by sandwiching the part
A polarized relay , wherein a positioning projection is provided on a flange of the coil bobbin .