JP2001155611A - High frequency relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency relay in which a fixed contact terminal is prevented from being deformed if a movable contact spring plate is inserted and arranged in a shield space contacting the fixed contact terminal. SOLUTION: The fixed contact terminals 19a to 19c are formed on a taper surface (R face) 35 inclined upward concerning the plate face of upper end (tip) from the upper end toward the lower direction. When the moveable contact spring plates 23A, 23B are inserted and arranged in between the shield plates 16A, 16B, the lower end contacts the ends of the fixed contact terminals 19a, 19b, or 19c without deforming them because of being pulled by the taper surface 35, by making the force added to the fixed contact terminals 19a to 19c escape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency relay.

[0002]

2. Description of the Related Art A conventional high frequency relay has a structure shown in FIG.

In this conventional example, a base 100 on which a relay mechanism is disposed and a case 1 attached to the base 100 are provided.
01, an electromagnet block 105 including a yoke 102, a coil 103, and an iron core 104; a card block 106;
The shield box 107 includes movable contact spring plates 108 and 108 provided on the card block 106 side, fixed contact terminals 109a to 109d, and the like. The shield box 107 is formed by bending and punching a single metal plate. Form the box part and the ground terminals 110. In addition, 111 is a balance spring.

The card block 106 of this conventional example has a pair of armatures 114, in which a permanent magnet 113 is interposed in a through hole formed at one longitudinal end of a substantially rectangular parallelepiped card 112.
114, one armature 114 is positioned between one pole face of the iron core 104 of the electromagnet block 105 and the tip of one end of the yoke 102, and the other armature 114
Is mounted on the electromagnetic block 105 so as to be located between the other magnetic pole surface of the iron core 104 and the tip of the other end of the yoke 102.

[0005]

By the way, in the above-mentioned conventional example, the base 10 at the bottom of the shield box 107 is provided.
The fixed contact terminals 109a to 109c protruding into the shield box 107 from the zero position have a rectangular cross-sectional shape at the distal end, and the distal end is angular. Therefore, when the movable contact spring plate 108 is inserted and arranged through the upper opening of the shield box 107. ,
As shown in FIG. 12, when contacting the tip of the fixed contact terminal 109, the movable contact spring plate 108 cannot escape.
Therefore, there is a problem that the fixed contact terminal 109 is deformed.

As shown in FIG. 13, this type of high-frequency relay Ry has a case where terminals are inserted into through holes formed in a printed circuit board 116 and soldered (through-hole type). Bend and print board 116
There are cases where the surface mount pattern is soldered and mounted (surface cloak type). When the surface cloak type is used, in the conventional example shown in FIG. Since the cross-sectional shapes of the ground terminals 110 do not match, there is a problem that the bending accuracy between the terminals is reduced. In FIG. 12, R indicates a resistance element, and IC indicates an IC element.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a movable contact spring plate which contacts a fixed contact terminal when it is inserted into a shield space. Another object of the present invention is to provide a high-frequency relay in which the fixed contact terminal is prevented from being deformed.

It is another object of the present invention to provide a high-frequency relay which can bend each terminal with high precision when bending each terminal for a surface mount type on a printed circuit board. is there.

A third object of the present invention is to provide a high-frequency relay in which the bending accuracy of a ground terminal integrated with a shield plate is improved in addition to the object of the second invention.

[0010]

According to the first aspect of the present invention, a movable contact spring plate supported by a card driven by an electromagnet block is inserted and arranged in a shield space provided on a base. A high frequency relay in which the movable contact of the fixed contact terminal of the fixed contact terminal protruding into the shield space from the base located at the bottom of the shield space is detachably opposed to the fixed contact portion of the fixed contact terminal facing the shield space. The front plate surface is a tapered surface that is inclined upward from the upper end toward the lower side.

According to a second aspect of the present invention, in the first aspect of the present invention, the coil terminal of the electromagnet block protruding outside from the lower surface of the base, the ground terminal protruding outside from the lower surface of the base from the shield space, and the lower surface of the base. The fixed contact terminal projecting more outwardly forms a surface mount terminal portion by bending, and at least the terminals have the same cross-sectional shape from the bent position to the lower end.

According to a third aspect of the present invention, in the second aspect of the present invention, the ground terminal is formed so as to extend integrally from a shield plate forming a shielded space. It is characterized by being wider than the width of the part.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment.

In this embodiment, as shown in FIGS. 1 and 2, a base 1 made of a synthetic resin molding material, a relay mechanism disposed on the base 1, and a synthetic resin molding agent adhered to the base 1 And a box-shaped case 2 made of

An electromagnet block 5, which is a main component of the relay mechanism, includes a coil bobbin 7 on which an exciting coil 6 is wound,
An iron core 8 inserted through the center through-hole of the coil bobbin 7 and one end of the iron core 8 protruding from one end side of the coil bobbin 7 are caulked and fixed to a front plate surface, and bent from this end so as to be parallel to the coil bobbin 7. The yoke 9 is formed by extending the tip of the bent piece to the other end of the coil bobbin 7.

The electromagnet block 5 includes a coil bobbin 7
The lower part of the coil terminals 10 and 10 provided on the base 1 is disposed on the base 1 so as to protrude toward the lower surface side of the base 1 from the insertion hole 11 provided in the base 1 as shown in FIG.

The armature 12, which is attracted and driven when the electromagnet block 5 is excited, is formed of an L-shaped bent iron piece. One piece 12a is opposed to the other end of the iron core 8 exposed at the other end of the coil bobbin 7. The inner corner of the bent portion is disposed so as to be rotatable against the tip of the bent piece of the yoke 9. Further, the tip of the other piece 12b is brought into contact with a side surface of the card 4 described later.

The lower portion of the hinge spring 3 is press-fitted into a press-fitting groove 14 formed in a lower portion 13 of a side wall 25 provided at one end of the base 1 on the side where the armature 12 is provided. The outer corner of the bent portion of the armature 12 is pressed by the tip of the holding piece 3a extending obliquely, and the inner corner of the armature 12 is pressed against the yoke 9 and held. .

On one upper side of the base 1 parallel to the position where the electromagnet block 5 is disposed, the partition 15 is separated from the position where the electromagnet block 5 is disposed, and the partition 15 and the side wall 36 on one side of the base 1 and the side walls 25 on both ends. The space above the base 1 surrounded by {circle around (1)} is a portion where the shield portion including the contact portion is disposed.

The shield portion is composed of two shield plates 16A and 16B arranged in parallel, and the base 1 extends along the inner surface of the side wall 15 at both ends of the shield portion.
As shown in FIG. 3A, the ribs 17 are arranged so that the opposing surfaces at both ends of the shield plates 16A and 16B are in contact with both side surfaces of each rib 17 formed above.

The rib 17 is provided on the shield plate 16 of the base 1.
The positions of the shield plates 16A and 16B are determined by the molding accuracy of the ribs 17, and the shield plates 16A and 16B are in contact with the opposing surfaces. The shield plates 1A and 16B are not affected by variations in the thickness of the plates 16A and 16B.
The distance between the plate surfaces inside 6A and 16B can be set with high accuracy.

As shown in FIG. 3 (a), a position corresponding to the center of the shield plates 16A and 16B and a position near each of the ribs 17 are located on the center line which bisects the shield plates 16A and 16B. The fixed contact terminals 19a, 19b, and 19c are respectively provided through holes 18 provided in the fixed contact terminals 19a to 19c, and the fixed contacts 20 of the fixed contact terminals 19a to 19c are set in a space surrounded by the shield plates 16A and 16B. Not.

Here, on the upper end of each side wall 25 of the base 1 at both ends of the portion where the shield portion is provided, pivot shaft portions 21 provided at both ends of the card 4 driven by the armature 12 are supported. Thus, support portions 22, 22 for bridging the card 4 above the shield portion are formed.

The card 4 has movable contact spring plates 23A and 23B.
In order to reduce the influence on the impedance of the air and make it easy to match the characteristic impedance, it is made of a molded product using a synthetic resin molding material such as Teflon (dielectric constant 2.0) close to the dielectric constant of air. At both upper end surfaces, a pivoting shaft portion 21 is integrally formed, and at both lower end portions, spring support portions 24 which support the central portions of the movable contact spring plates 23A, 23B by insert molding are provided, respectively, and are provided above the shield portion provided portion. The movable contact spring plate 23
A, 23B are arranged between the shield plates 16A, 16B.

Here, the card 4 is bridged because the pivot shaft 21 is rotatably supported by the pivoting support portions 22 provided on the upper ends of the side walls 25 on both ends of the base 1. The positions of the movable contact spring plates 23A, 23B held by the spring support portions 24, 24 with respect to the upper surface of the base 1 by insert molding are set with high accuracy.

As shown in FIGS. 4 (a) and 4 (b), the pivot 21 has a shaft 21a having a circular front section at the front end, and a lower front section substantially at the back of the shaft 21a. An inverted triangular rotation fulcrum 21b is integrally formed, and the lower end surface of the rotation fulcrum 21b is formed into an arc-shaped curved surface extending over both side surfaces so that the lowermost position thereof coincides with the height position of the center of the shaft 21a. .

On the other hand, the rotation support portion 22 is formed along the inner side surface of the side wall 25 and supports the rotation fulcrum portion 21b at the upper end surface, and the upper end portion of the side wall 25 continuous with the support stage 22a. And a square hole 22b having an open upper end. The distance between the inner surfaces on both sides of the square hole 22b is the same as the diameter of the shaft portion 21a, and the height between the bottom and the upper end surface of the rotation fulcrum 21b is set. The distance is slightly larger than the radius of the shaft 21a so that a gap is formed between the lower end and the bottom of the shaft 21a.

The two movable contact spring plates 23A and 23B supported by the respective spring support portions 24 of the card 4 by insert molding are arranged on both sides of a line connecting the fixed contact terminals 19a to 19c. Both ends of the first movable contact spring plate 23A are movable contacts that contact and separate from one surface of the fixed contact 20 of the central fixed contact terminal 19a and one surface of the fixed contact 20 of the fixed contact terminal 19b at one end. , And both ends of the second movable contact spring plate 23B are opposed to the other surface of the fixed contact 20 of the central fixed contact terminal 19a and the other surface of the fixed contact 20 of the fixed contact terminal 19b at the other end. The movable contacts make and break contact with each other, and the contact and separation operations are performed by the rotation of the card 4.

The shield plates 16A and 16B are connected to the spring support portions 24 of the movable contact spring plates 23A and 23B on the side closer to each other.
Is formed by bending the escape portion 26 to escape from the center by bending a portion between one end from the center in the opposite direction,
The flat surfaces of the shield plates 16A and 16B on both sides of the escape portion 26 constitute a ground contact portion that comes into contact when both ends of the movable contact spring plates 23A and 23B are separated from the fixed contact 20 and moved.

Each of the shield plates 16A and 16B has the same shape and has two ground terminals 27a and 27b, respectively.
Are formed integrally (see FIGS. 5 and 6). The distance from each end of each of the shield plates 16A and 16B to the nearest ground terminal is set to λ / 30 or less of the wavelength of the signal to be opened and closed so that the antenna effect does not occur.

Further, the shield plates 16A and 16B are the base 1
Fixed contact terminals 19a, 19b or 1
9c, a ground terminal 27a is formed at one end of a portion where the escape portion 26 is formed, and the ground terminal 27a is perpendicular to the inside of the lower end of the portion where the escape portion 26 is formed. The lower end of the hanging piece 28b is bent at a right angle further below the tip of the wide piece 28a which is bent and extended so that its tip is located on a straight line connecting the fixed contact terminals 18a to 18c when disposed on the base 1. It consists of a thin plate piece that extends further down from one end. The other ground terminal 27b is bent at a right angle inward from a position outside the escape portion 26 near the other end of the portion forming the escape portion 26, and the tip thereof is fixed to the fixed contact terminals 18a to 18c when disposed on the base 1.
Wide piece 28 extended so as to be located on a straight line connecting
The hanging piece 28 bent at a right angle further below the tip of a '
It is made of a narrow plate piece that further extends downward from one end of the lower end of b ′.

The shield plate 16A thus formed,
16B have the same shape, and are arranged point-symmetrically on the base 1 so that the ground terminals 27a and 27b are fixed at the center fixed contact terminal 19a and at the end fixed contact terminals 19b or 19b.
c.

When disposing the shield plates 16A and 16B at the shield portion, the opposing surfaces of the two end portions are positioned in contact with the both side surfaces of the ribs 17 and 17 as described above. In addition, each of the ground terminals 27a, 2
Each of the ground terminals 27a, 27b is projected to the lower surface side of the base 1 through an insertion hole 29 penetrating through the base 1 corresponding to the width of the hanging pieces 28b, 28b 'integrally forming the 7b. Or 28b 'is inserted into the insertion hole 29.

Then, as described above, the shield plates 16A, 1
After arranging the 6B at the shield portion arranging portion, the pivot support portions 22 of the side walls 25, 25 at both ends of the base 1 rotatably support the pivot portions 21 at both ends of the card 4 so that the card 4 can be moved. By arranging the movable contact spring plate 23A between the fixed contact terminals 19a and 19b and the escape portion 26 of the shield plate 16A and arranging the movable contact spring plate 23B with the fixed contact terminal 19a by arranging the bridge above the shield arrangement portion. , 19c and shield plate 16
A can be disposed between the A and the escape portion 26.

Here, the plate surface at the upper end (tip) of the fixed contact terminals 19a to 19c is formed by a tapered surface (R surface) 35 which is inclined upward from the upper end as shown in FIG. The contact spring plates 23A and 23B are shield plates 16
Even when the lower end contacts the tips of the fixed contact terminals 19a, 19b or 19a, 19c when inserted between A and 16B, the lower end of the fixed contact terminal 19a is guided by the tapered surface 35.
To the fixed contact terminals 19a to 1c.
9b is prevented.

When the card 4 is arranged on a bridge, the side wall 25
The shaft 21a is fitted from the upper end opening into the square hole 22b of the rotation support portion 22 on the side, and the rotation fulcrum 21b is placed on the upper end surface of the fulcrum base 22a as shown in FIG. Is bridged between both side walls of the base 1. Thus, the support in the horizontal direction is shared by the square hole 22 and the shaft portion 21a, and the vertical support is shared by the fulcrum base 22a and the rotation fulcrum portion 21b, and the center of the shaft portion 21a and the upper end surface of the fulcrum base 22a. By matching the positions, it is possible to more reliably support the pivot 21 as compared with a case where the pivot shaft 21 is supported at one place. Further, since the lower end of the shaft portion 21a is floating above the bottom of the square hole 22b, burrs generated when the base 1 is formed can be released.

The lower side surface of the card 4 provided on the bridge is constantly biased by the return spring 31 in the direction of the shield plate 16A. The return spring 31 press-fits the base 31 a into a press-fitting groove 32 formed on one inner surface of the side wall 36 of the base 1.
The tip of a spring piece 31b extending from the upper end of the upper part a toward the shield plate 16B resiliently contacts the lower side surface of the card 4 located above the upper end of the shield plate 16B. The card 4 is rotated about the portion 21 so that both ends of the inner movable contact spring plate 23A abut against plate surfaces near both ends of the escape portion 26 of the shield plate 16A, and both ends of the outer movable contact spring plate 23B. The portions are brought into contact with the fixed contacts 20, 20 of the fixed contact terminals 19a, 19c. The movable contact spring plate 23A,
The portions constituting the movable contact at both ends of 23B are divided into two parts.

Here, as shown in FIG.
The end of the other piece 12b of the armature 12 contacts the side surface of the card 4 at the same position on the opposite side of the side surface of the card 4 pressed by 1b. The pressed parts face each other and balance the force
Therefore, the relay operation is stabilized. Also, as shown in FIG.
The friction between the spring piece 31b and the other piece 12b is reduced by reducing the displacement of the part that is in contact with the other piece 12b.

The base 4 has the electromagnet block 5, the shield plates 16A and 16B, the fixed contact terminals 19a to 19d, the card 4 including the movable contact spring plates 23A and 23B, and the armature 1
2, after the members of the relay mechanism such as the hinge spring 3 and the return spring 31 are disposed, when the spring pressure of the return spring 31 and the hinge spring 3 is adjusted, the side wall of the base 1 on which the springs 31 and 3 face. This can be easily performed through the openings 25a of the 25 and the openings 36a of the side wall 36.

After the adjustment of the spring pressure, the side walls 2 at both ends of the base 1
5 and the side walls 36 on both sides so as to fit inside.
Then, if the case 2 is attached, a desired high-frequency relay is completed.

The high-frequency relay of this embodiment configured as described above has fixed contact terminals 19a to 19c projecting from the lower surface of the base 1 to the outside, ground terminals 27a, 27b,.
In the state shown in FIG. 1 in which the coil terminals 10 and 10 are extended downward, the through-hole type is mounted on a printed circuit board. However, if each is bent outward at a right angle, it can also be used as a surface cloak type. And in this embodiment,
Fixed contact terminals 19a to 19c which correspond to terminal portions to be mounted on a circuit pattern surface of a printed circuit board as a surface cloak type
19c, ground terminals 27a, 27b ..., coil terminal 1
The cross-sectional shapes of the portions 0 and 10 are the same so that the bending accuracy does not vary between the terminals when bending in accordance with the surface cloak type. That is, any terminal can be bent with high accuracy.

The ground terminals 27a, 27b,... Formed integrally with the shield plates 16A, 16B
The lower end positions of the b and 28b 'are made as low as possible so that the bent positions of the ground terminals 27a and 27b are set near the lower end positions thereof as shown in FIG. This secures a space between the base 1 and the printed circuit board 38 when mounted.

Next, the operation of the high-frequency relay of the present embodiment configured as described above will be described.

First, when the electromagnet block 1 is in the non-excited state, the card 4 is rotated in the direction of moving toward the electromagnet block 5 by the bias of the return spring 31, and the movable contact spring plate 23A is shielded at both ends. The inner surface of the plate 16A is grounded through ground terminals 27a and 27b.

On the other hand, both ends of the movable contact spring plate 23B come into contact with the fixed contacts 20, 20 of the fixed contact terminals 19a, 19c to conduct between the fixed contact terminals 19a, 19c.

Next, when the electromagnet block 5 is excited, one piece 12a of the armature 12 is attracted to the iron core 8, and the armature 12 rotates. Due to this rotation, the other piece 12 b pushes the card 4 and turns the counter electromagnet block 5 in the direction against the bias of the return spring 31. Due to this rotation, the movable contact spring plate 23B has both ends separated from the fixed contacts 20 and 20 and comes into contact with the inner surface of the shield plate 16B to contact the ground terminals 27a and 27b.
b is grounded.

On the other hand, both ends of the movable contact spring plate 23A are brought into contact with the fixed contacts 20, 20 of the fixed contact terminals 19a, 19b to conduct between the fixed contact terminals 19a, 19b. This state is the state shown in FIG.

When the excitation of the electromagnet block 5 is stopped, the card 4 is rotated by the bias of the return spring 31 so that the lower portion moves toward the electromagnet block 5, and the movable contact spring plate 23A
Are brought into contact with the inner surface of the shield plate 16A, and both ends of the movable contact spring plate 23B return to the state of contact with the fixed contacts 20, 20 of the fixed contact terminals 19a, 19c.

[0049]

According to the first aspect of the present invention, the movable contact spring plate supported by the card driven by the electromagnet block is inserted and arranged in the shield space provided on the base to move the movable contact of the movable contact spring plate. In a high-frequency relay in which a fixed contact terminal of a fixed contact terminal protruding into the shield space protrudes into the shield space from a base located at the bottom of the shield space, the position of the fixed contact portion where the movable contact of the movable contact spring plate faces in a movable contact spring plate. The surface from the fixed contact terminal to the tip of the fixed contact terminal is tapered so that the fixed contact terminal becomes thinner toward the tip. When the movable contact spring plate is inserted into the shielded space, the movable contact spring plate is Even if the fixed contact terminal touches, the tapered surface prevents the movable contact spring plate from inducing the deformation of the fixed contact terminal by inviting the movable contact spring plate. It is possible to prevent occurrence of malfunction and operation variation of the relay, the frequency characteristic failure and the occurrence of variation.

According to a second aspect of the present invention, in the first aspect of the invention, the coil terminal of the electromagnet block protruding outside from the lower surface of the base, the ground terminal protruding outside from the lower surface of the base from the shield space, and the lower surface of the base. The fixed contact terminals that protrude more outward form terminal portions for surface mounting by bending, and at least the cross-sectional shape of each terminal from the bent position to the lower end is the same, so it is a surface cloak type When each terminal is bent, variation in bending accuracy between the terminals is prevented, and mounting on a printed circuit board is ensured. As a result, it is possible to contribute to stabilization of high-frequency characteristics.

According to a third aspect of the present invention, in the second aspect of the present invention, the ground terminal is formed integrally with a shield plate forming a shield space, and a width from a base end to the bent position is set to the width of the terminal. Since the width is wider than the width of the portion, it is easy to obtain the bending accuracy of the ground terminal, and it is possible to secure a space between the base and the printed circuit board when mounted in a surface cloak type.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of Embodiment 1 of the present invention.

FIG. 2A is a plan sectional view of the same. (B) is an AA cross-sectional view of (a).

FIG. 3A is a top view of a base used in the embodiment.
(B) is front sectional drawing of the base used same as the above.
(C) is a front view of the base used in the above. (D) is a side sectional view of the base used in the above.

FIG. 4A is an enlarged cross-sectional view in which some of the main parts of the above are partially omitted. (B) is an enlarged front view which can omit a part of principal part same as the above.

FIG. 5A is a front view of one shield plate of the above. (B) is a front view of the other shield plate of the above.

FIG. 6 is an explanatory diagram of a configuration of the above shield plate.

FIG. 7 is an explanatory diagram of a supporting portion of a pivot shaft portion of the card according to the first embodiment.

FIG. 8 is a side view of the card.

FIG. 9 is an explanatory diagram showing a relation between a movable contact spring plate and a fixed contact terminal according to the first embodiment.

FIG. 10 is an explanatory diagram of a ground terminal at the time of mounting the surface cloak type according to the first embodiment.

FIG. 11 is an exploded perspective view of one conventional example.

FIG. 12 is a diagram illustrating the relationship between a movable contact spring plate and fixed contact terminals according to the third embodiment.

FIG. 13 is an explanatory view of mounting a high-frequency relay.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Case 3 Hinge spring 4 Card 5 Electromagnet block 12 Armature 15 Partition wall 16A, 16B Shield plate 19a-19c Fixed contact terminal 21 Rotation part 22 Rotation support part 23A, 23B Movable contact spring plate 26 Escape part 17a, 17b Ground terminal 35 Tapered surface

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[Procedure amendment]

[Submission Date] October 25, 2000 (2000.10.
25)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 11

Continuing on the front page (72) Inventor Tomohiro Taguchi 1048 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Works, Ltd.

Claims (3)

[Claims] A movable contact spring plate supported by a card driven by an electromagnet block is inserted and arranged in a shield space provided on a base, and a movable contact of the movable contact spring plate is located at the bottom of the shield space. In a high-frequency relay for allowing a fixed contact terminal of a fixed contact terminal protruding into a shield space from a base to come into contact with and separate from the fixed contact terminal, a front plate surface of the fixed contact terminal facing the shield space faces downward from an upper end. High frequency relay characterized by a tapered surface that slopes up. 2. A coil terminal of an electromagnet block protruding outside from a lower surface of the base, a ground terminal protruding outside from a lower surface of the base from a shield space, and a fixed contact terminal protruding outside from a lower surface of the base by bending. 2. The high-frequency relay according to claim 1, wherein a terminal portion for a surface mount is formed, and at least a cross-sectional shape of each terminal from a bending position to a lower end is the same. 3. The terminal according to claim 1, wherein the ground terminal is formed integrally with a shield plate forming a shield space, and a width from a base end to the bent position is wider than a width of the terminal portion. The high frequency relay according to claim 2, wherein