JPH06251680A - Polar relay - Google Patents

Abstract

PURPOSE:To improve position accuracy of a fixing piece of a common contact terminal. CONSTITUTION:A recessed part 16, having a taper contracting the interior part, is formed inside a fixing piece 7a of respective common contact terminals 72 of a body block 11. As a result in this constitution, a protruded part 17 having the tapered point end is provided inside the fixing piece 7a of the respective common contact terminals 72 of the body block 11 in a metal mold side. By providing this protruded part 17 in the metal mold, positioning the fixing piece 7a of the common contact terminals 72 is performed at molding time, to improve position accuracy of the fixing piece 7a.

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 structure in which an armature block is oscillatably mounted on an electromagnet block, and contacts are switched in accordance with the armature block oscillating according to coil energization control. The present invention relates to a structure of simultaneously forming a terminal block including a plurality of terminals including a common contact terminal integrally with an electromagnet block.

[0002]

2. Description of the Related Art As a polarized relay, as shown in FIG. 7, a coil 3 in an insulated state is attached to a substantially U-shaped iron core 1.
And the permanent magnet 4 is interposed between the tips of both side pieces 1a of the iron core 1 so as to face the upper surface of the both side pieces 1a as magnetic pole portions of the iron core 1 and to swing freely on the permanent magnet 4. There is a so-called balanced amateur structure in which 5 is mounted. In this polarized relay, a contact spring 6 is integrally attached to the armature 5, and a movable contact 8 is attached to the contact spring 6.
Is fixed, and the movable contact 8 is brought into contact with and separated from the fixed contact 9 arranged opposite to the movable contact 8 in accordance with the swing of the armature 5 to perform contact switching. Further, a ridge 5a is formed at the center of the lower surface of the armature 5, and the ridge 5a is swingable about the swing fulcrum. Further, the permanent magnet 4 is magnetized to have different polarities at the center and both ends, and even when the coil 3 is de-energized, the magnetomotive force of the permanent magnet 4 causes one end of the armature 5 and the side piece 1a of the iron core 1. The structure keeps contact with the upper surface of the.

In this type of polarized relay, the iron core 1, the coil 3 and the permanent magnet 4 constitute an electromagnet block 14, and four fixed contact terminals 7 ₁ each having a fixed contact 9 fixed to the base end thereof, and the above-mentioned structure. Two common contact terminals 7 ₂ having fixing pieces 7a to which the hinge spring pieces 6a of the contact springs 6 are respectively fixed,
Configure the terminal block 7 with the four coil terminals 7 ₃ for energizing the coil 3, the common contact terminal 7 _{and second} fixing pieces 7a
There is a body block 11 in which the electromagnet block 14 and the terminal block 7 are integrally molded with a synthetic resin so as to be disposed on both sides of the electromagnet block 14. Here, the terminal block 7, by adding a punched bending the hoop material 15, are constructed by forming integrally the terminal 7 _{1-7 3} (see FIG. 4).

The armature 5 mounted on the body block 11 so as to be swingable is integrated with the contact spring 6 as an armature block 12. Here, the armature 5 and the contact spring 6 are molded and integrated with a synthetic resin (molded portion 12a). In the case of this polarized relay, since it is a two-circuit type, two contact springs 6 are provided on both sides of the armature 5.

The movable contacts 8 are fixed to both ends of the respective contact springs 6. A hinge spring piece 6a is provided laterally from the center position of the armature 5 of each contact spring 6, that is, the position corresponding to the formation position of the protrusion 5a serving as the swing fulcrum of the armature 5. . The tip of this hinge spring piece 6a is fixed to the fixing piece 7a of the common contact terminal 7 ₂ of the electromagnet block 14, and when the armature 5 is attracted to one of the side pieces 1a of the iron core 1, the fixed tip portion is fixed. A restoring force is applied to the armature 5 due to the twist generated between the contact spring 6 and the base extending from the contact spring 6.

[0006]

By the way, the fixing piece 7a of the common contact terminal 7 ₂ needs to expose the fixing surface of the hinge spring piece 6a from the synthetic resin portion forming the body block 11. 7 ₂ plate form to embed the about half the thickness, was molded by synthetic resin.

Here, the common contact terminal 7₂Synthetic resin
Common contact terminal 7 ₂For bending accuracy
Therefore, some variation occurs. Therefore, in the past,
If there is a dimensional allowance in the mold of the block 11,
It was possible to bury it in a predetermined state by absorbing the glare. Shi
However, if you give a margin to the mold dimension like this,
Common contact terminal 7₂The position of the fixing piece 7a of the
Common contact terminal 7 for injection pressure during molding₂Bent
Therefore, there is a problem that the positional accuracy of the fixing piece 7a becomes low.
there were.

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 balanced armature structure capable of increasing the positional accuracy of the fixed piece of the common contact terminal. is there.

[0009]

According to the present invention, in order to achieve the above object, a recess having a taper with a smaller depth is formed inside the fixing piece of each common contact terminal of the body block. .

[0010]

According to the present invention, as described above, it is necessary to form the recessed portion having the taper with the smaller depth at the inner side of the fixed piece of each common contact terminal of the body block. Inside the fixed piece of the common contact terminal, a convex portion having a tapered tip is provided. Here, by providing this convex portion on the mold, it is possible to position the fixing piece of the common contact terminal during molding, and even if there is some variation in the bending accuracy of the common contact terminal, the fixing piece is fixed. It is possible to bury in the state of, and improve the positional accuracy of the fixing piece.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The present embodiment has basically the same structure as the polarized armature relay having the balanced armature structure described in the section of the prior art, and in particular, the following description will be made using a monostable operation type. As shown in FIG. 3, an electromagnet block 14 including an iron core 1, a coil 3 and a permanent magnet 4 is integrally molded with a terminal block 7 with synthetic resin to form a body block 11. The armature block 12 is placed on the body block 11, and the cover 13 is attached to the body block 11.

As shown in FIG. 1B, the electromagnet block 14 has a coil bobbin 2 integrally formed with the coil bobbin 2 by insert-molding a substantially U-shaped iron core 1 into the coil bobbin 2, and the coil bobbin 2 has a body portion. Winding coil 3 and iron core 1
The permanent magnet 4 is interposed between both side pieces 1a.
Here, the tips of the side pieces 1a, which are the magnetic poles of the iron core 1, are
It is exposed from the collar portion of the coil bobbin 2. The permanent magnet 4 is magnetized with different polarities at the center and both ends.

In each of the collar portions 2a of the coil bobbin 2,
Is a connection piece 21 for connecting both ends of the coil 3 and this connection
It is integrated with the piece 21 and has a coil terminal 7₃Is stuck
And a fixing piece (not shown) that has been planted. Above electromagnet
The lock 14 is made of synthetic resin together with the terminal block 7.
Integrated into a body block 11 shown in FIG.
Be done. As the terminal block 7, a fixed contact 9 is formed at the base end.
4 fixed contact terminals 7 made₁And the connection described later on the base end
The fixed piece 7a to which the hinge spring piece 6a of the point spring 6 is fixed is
Common contact terminal 7 formed ₂And energize coil 3
Coil terminal 7₃With. This polarized relay is a two circuit
Since it is an ip, there are two
Fixed contact terminal 7₁, One common contact terminal 7₂And two
Coil terminal 7₃Are planted respectively.

The terminals 7 _{1 to} 7 ₃ are simultaneously formed in the shape shown in FIG. 4 by punching out the hoop material 15 and applying a bending process. Incidentally, the portion corresponding to one of the polarized relay Thus hoop 15 forming the terminal 7 _{1-7 3} is a terminal block 7 described above. The terminal block 7 is aligned with the electromagnet block 14 in the shape shown in FIG. 4, and is integrally molded with synthetic resin.

By the way, as described above, the body block 1
When molding 1, the position of the fixed piece 7a of the common contact terminal 7 ₂ varies. Therefore, in the present embodiment, the recessed portion 16 having a taper with a smaller depth is formed inside the fixing piece 7a of each common contact terminal 7 ₂ of the body block 11. Here, body block 1 like this
Forming the recess 16 inside the fixed piece 7a of each common contact terminal 7 ₂ of 1 means that the common contact terminal 7 ₂ of each body block 11 is formed on the mold A side for molding the body block 11. Inside the fixed piece 7a, a convex portion 17 having a tapered tip is provided. Here, by providing this convex portion 17 on the mold A, the fixing piece 7a of the common contact terminal 7 ₂ can be positioned (positioning in the direction orthogonal to the paper surface in FIG. 4) during molding, and the common contact terminal 7 ₂ can be positioned. even if there is some variation in the 7 _second bending accuracy can be implanted anchoring piece 7a in a predetermined state. Therefore, the positional accuracy of the fixed piece 7a is increased, and the operating characteristics of the polarized relay can be stabilized.

By the way, the above-mentioned convex portion 17 has a semicircular cross section, and the convex portion 17 is provided inside each of the fixing pieces 7a of the common contact terminal 7 ₂ so that the terminal block 7 and the electromagnet block 14 are connected. Can be positioned, that is, the terminal block 7 can be positioned in the left-right direction in FIG. 4, and the body block 11 can be easily molded.

It should be noted that, in a polarized relay having a balanced armature structure, the fixed contact 9 and the magnetic pole portion 1a of the iron core 1 are adjacent to each other as shown in FIG. There are drawbacks. Therefore, as shown in FIG. 3, an insulating wall 18 is formed between the fixed contact 9 and the magnetic pole portion 1a of the iron core 1 to isolate them from each other. The insulating wall 18 is formed by molding the body block 11. By providing the insulating wall 18, the creeping distance between the fixed contact 9 and the iron core 1 can be increased, and the insulating distance can be increased, and thus the withstand voltage between the input and the output can be increased.

Here, if the upper end surface of the insulating wall 18 is formed to have a height corresponding to the inner bottom surface of the cover 13 as shown in FIG. 6, the upper surface of the cover 13 can also be reinforced. After molding the terminals 7 _{1 to} 7 ₃ together with the electromagnet block 14 as described above, the portions of the hoop material 15 to which the terminals 7 _{1 to} 7 ₃ are integrally connected are cut off,
The portions exposed from the moldings of the respective terminal blocks 7 are bent downward to form the body block 11 in the shape shown in FIG.

When the iron core 1, the permanent magnets 4 and the fixed contacts 9 are integrally formed as the body block 11 as described above, the armature block 12, which will be described later, is oscillatably mounted on both sides of the iron core 1. The positional accuracy of the magnetic pole surface, which is the upper surface of 1a, and the fixed contact 9 can be increased. That is, when each member is individually assembled and formed, the positions of the rocking surface, the magnetic pole surface, and the fixed contact 9 vary due to variations in the assembling state of each member. However, if the body block 11 is integrally formed as in this 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 stable.

As shown in FIG. 3, the armature block 12 is composed of a plate-shaped armature 5 and a contact spring 6 integrally attached to the armature 5, and is basically a conventional armature. It has the same structure as the block. That is, the armature 5 and the contact spring 6 are molded integrally with synthetic resin and integrally formed, and are of two-circuit type. Therefore, two contact springs 6 are provided on both sides of the armature 5.

Here, the armature 5 and the contact spring 6 are molded with synthetic resin to integrally form the armature block 12, so that the armature 5 and the contact spring 6 are insulated by the molding portion 12a. In this way, in the molding part 12a,
It is possible to prevent the insulation distance between the contact spring 6 and the coil 3 via the armature 5 from being substantially shortened. Moreover, in the case of the present embodiment, since the coil 3 is embedded in the molded member of the body block 11, the body block 1
Even in the case of No. 1 molded member, the contact spring 6 and the coil 3 are insulated from each other, so that the input / output withstand voltage can be sufficiently secured.

A movable contact 8 is provided at each end of the contact spring 6.
Is fixed, and a hinge spring piece 6a is projectingly provided from one side portion of the central portion. The hinge spring piece 6a is connected to the common contact terminal 7 ₂
The contact spring 6 is electrically connected to the common contact terminal 7 ₂ . Common contact terminal 7 ₂
1A, the hinge spring piece 6a has a base portion extending from the contact spring 6 at a center position of the armature block 12, that is, a ridge serving as a swing fulcrum of the armature 5. It extends from a position displaced from the formation position of 5a. The tip of the hinge spring piece 6a is fixed to the fixing piece 7a of the common contact terminal 7 ₂ at the center position of the armature block 12.

Thus, the contact spring 6 of the hinge spring piece 6a is
By shifting the extension position from the center position of the armature block 12, the spring load on both sides of the swinging fulcrum of the armature block 12 can be unbalanced, and the spring force of the hinge spring piece 6a can be changed. 4 is made larger than the magnetomotive force that attracts the armature 5 to the magnetic pole surface of the iron core 1, the armature 5 is kept constant against the attraction force between the armature 5 and the magnetic pole surface of the iron core 1 by the permanent magnet 4. It can be rotated to return to the state. Therefore, the polarized relay operates monostable.

That is, since the restoring force of the hinge spring piece 6a on the side where the extension position of the hinge spring piece 6a from the contact spring 6 is displaced from the center position of the armature block 12 becomes strong, the armature block 12 is The end on the side where the hinge spring piece 6a extends from the contact spring 6 is normally open (N
O) side and the other side is normally closed (NC) side.

Here, by adopting a structure in which the extension position of the hinge spring piece 6a from the contact spring 6 is displaced from the swing fulcrum, the length between the base portion and the fixed portion of the extension portion of the hinge spring piece 6a is increased. The length can be increased, the degree of freedom in the Z-axis direction (direction orthogonal to the paper surface in FIG. 1A) can be obtained, and the spring characteristics can be softened. Therefore, there is no possibility that the hinge spring piece 6a is deformed by impact or vibration.

The hinge spring piece 6a has a contact spring 6
A U-shaped rising portion 6b opening downward is formed between the extending base portion and the fixed portion in the direction substantially along the swinging direction of the armature block 12, that is, in the vertical direction. is there.
By forming the rising portion 6b in this manner, the hinge spring piece 6
The length between the base portion and the fixed portion of the extending portion of a can be further increased. In addition, by bending the armature blocks 12 on both vertical pieces of the rising portion 6b in both end directions, it is possible to provide a degree of freedom in the X direction (left and right direction in FIG. 1A) and Due to the expansion and contraction of the opening width at the bottom of 6b, Y
A degree of freedom in the direction (vertical direction in FIG. 1B) can also be provided. For this reason, the hinge spring piece 6a can be provided with a degree of freedom in all directions, and deformation of the hinge spring piece 6a due to impact or vibration does not occur. Therefore, the characteristic change can be prevented.

The armature block 12 is placed on the permanent magnet 4 of the body block 11 and the cover 13 is fitted. The cover 13 has a box-like shape with an open lower surface, and a sealing portion 13a for sealing the inside is formed at one corner of the upper surface, as shown in FIG. 1 (a). The operation of the polarized relay of the above embodiment will be briefly described. In this polarized relay, in a stationary state where the coil 3 is de-energized, the end of the armature 5 on the side opposite to the side where the extension position of the hinge spring piece 6a is displaced by the magnetomotive force of the permanent magnet 4 is the iron core. It is in a state of being attracted to the first 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 has the side piece 1 of the iron core 1.
Adsorbed by a. At this time, the movable contact 8 on one end side of the contact spring 6 contacts the fixed contact 9. This state is maintained while the coil 3 is energized.

When the power supply to the coil 3 is stopped,
The spring force of the hinge spring piece 6a causes the armature 5 to return to a constant state and rotate against the attraction force between the armature 5 and the magnetic pole surface of the iron core 1 by the permanent magnet 4. By the way, in the above description, the present invention has been described by way of an example of a polarized relay having a monostable balanced amateur structure, but it goes without saying that the present invention can also be applied to a polarized relay having a bistable balanced amateur structure. Yes.

[0030]

As described above, according to the present invention, since the recesses having the taper with the smaller depth are formed inside the fixing pieces of the respective common contact terminals of the body blocks, the body blocks are formed on the mold side. Inside the fixed piece of the common contact terminal of, it is possible to provide a convex portion having a tapered tip,
For this reason, the fixed piece of the common contact terminal can be positioned by the convex portion during molding, and even if there is some variation in the bending accuracy of the common contact terminal, the fixed piece can be embedded in a predetermined state. The positional accuracy of the fixed piece is increased, and as a result, the operating characteristics of the polarized relay can be stabilized.

[Brief description of drawings]

1A to 1C are plan sectional views of an embodiment of the present invention, a sectional view taken along line AB in FIG. 1A, and C in FIG.
It is a -D line sectional view.

FIG. 2 is a plan view of a body block.

FIG. 3 is a perspective view showing a body block and an armature block.

FIG. 4 is an explanatory view showing a method of integrally forming an electromagnet block and a terminal block.

5 is a cross-sectional view taken along the line EF in FIG.

FIG. 6 is a cross-sectional view of a structure in which a cover is reinforced with an insulating wall.

7A and 7B are a plan sectional view showing a structure of a conventional polarized relay having a balanced armature structure, and a sectional view taken along the line A'-B 'in FIG. 7A.

FIG. 8 is a perspective view showing a body block and an armature block of the above.

[Explanation of symbols]

1 Iron core 1a Side piece 3 Coil 4 Permanent magnet 5 Armature 6 Contact spring 6a Hinge spring piece 6b Rising part 7 Terminal block 7 ₁ Fixed contact terminal 7 ₂ Common contact terminal 7 ₃ Coil terminal 7a Fixed piece 8 Moving contact 9 Fixed contact 11 body block 12 armature block 14 electromagnet block 16 concave portion 17 convex portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuji Sawada 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor Atsushi Nakahata 1048 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] 1. An electromagnet block is constituted by an iron core whose both ends are magnetic poles, a coil wound around the iron core in an insulating state, and a permanent magnet arranged between the magnetic poles of the iron core. An armature block is composed of an armature that is swingably mounted on a permanent magnet with both ends facing the magnetic pole of the iron core, and a pair of contact springs that are integrally attached to both sides of the armature. A terminal block is composed of a fixed contact terminal having a fixed contact fixed to the base end, a pair of common contact terminals having fixing pieces to which the hinge spring pieces of the contact spring are fixed, and a coil terminal for energizing the coil. The electromagnet block and the terminal block are integrally molded with synthetic resin to form body blocks in such a manner that the fixed pieces of the common contact terminal are arranged on both sides of the electromagnet block. A polarized relay characterized in that a recessed portion having a tapered inner portion is formed inside a fixed piece of the contact point terminal.