JP2001312951A - High-frequency relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure impedance matching for high-frequency signals. SOLUTION: The high-frequency relay comprises an electromagnet made by the iron core wound with the coil 3, a coil terminal 4 connected to the coil 3, the normally closed side fixed terminal 15, the normally open side fixed terminal 16, a common fixed terminal 17, the contact driven to connect with either one of the normally closed side fixed terminal 15 and the normally open side fixed terminal 16 and with the common fixed terminal 17 and the armature to be pulled and detached by the iron core according to the excitation of the coil 3 so as to drive the contact. The normally closed side fixed terminal 15, the normally open side fixed terminal 16, the common fixed terminal 17 and the coil terminal 4 are derived to the outside under insulating conditions. This constitution specifies that the common fixed terminal 17 be led out along the surroundings from the plane view, between the deriving locations of the normally closed side fixed terminal 15 and the normally open side fixed terminal 16, and that the coil terminal 4 be derived between the lead out locations of the ordinarily close side fixed terminal 15 and the common fixed terminal 17 and between the lead out locations of the normally open side fixed terminal 16 and the common fixed terminal 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a high-frequency relay for switching a high-frequency signal.

[0002]

2. Description of the Related Art A conventional high-frequency relay 100 is shown in FIG. This is a so-called two-pole relay, which includes an electromagnet (not shown), coil terminals 101 and 101, normally closed fixed terminals 102 and 102, normally open fixed terminals 103 and 103, and common fixed terminals 104 and 10.
4. Normally closed contacts 105, 105, normally open contacts 106, 106, armature (not shown), intermediate movable member (not shown), base 107, eight earth terminals 108
It has.

The coil terminals 101 are connected to both ends of a coil (not shown) of an electromagnet (not shown). The normally closed fixed terminals 102 and 102 form a pair with the normally open fixed terminals 103 and 103. Common fixed terminal 10
4 and 104 are connected to the normally-closed fixed terminals 102 and 102 via the normally-closed contacts 105 and 105, or are connected to the normally-opened fixed terminals 103 and 103 via the normally-opened contacts 106 and 106. Connected.

[0004] The armature (not shown) is attracted to and separated from the iron core (not shown) of the electromagnet in response to the excitation of the coil of the electromagnet, so that the armature is moved through an intermediate movable member (not shown).
The normally closed contacts 105, 105 and the normally open contacts 106, 106 are driven. With this drive, as described above, the common fixed terminals 104, 104 are connected to the normally closed fixed terminals 102, 105 via the normally closed contacts 105, 105.
102 or a normally open contact 106,
It is connected to the normally-open-side fixed terminals 103, 103 via 106.

The base 107 has coil terminals 101, 101, ground terminals 108, 108, ground terminals 108, 108, normally closed fixed terminals 102, 102, common fixed terminals 104, 10
4, earth terminals 108, 108, earth terminals 108, 1
08, and the normally open fixed terminals 103, 103 are in turn insulated from the periphery in plan view.

This high-frequency relay 100 is used to constitute an attenuator circuit 300 together with an attenuator element 200 for attenuating the signal strength by a required amount without causing distortion. In this case, the high-frequency relay 100
Are disposed on the surface of the printed circuit board 400 having a microstrip structure. This microstrip structure is, as shown in FIG. 6, a transmission line 4 on the front side of a printed circuit board 400.
This is a structure in which a dielectric 403 is sandwiched between the ground member 01 and the ground member 402 on the rear side, and is effective for impedance matching of a high-frequency signal.

This high-frequency relay has a normally closed fixed terminal 10.
2 and 102 are connected by a transmission path 401 of a printed circuit board 400 having a microstrip structure, and the attenuator element 200 is connected between the normally open fixed terminals 103 and 103.
And the common fixed terminal 104 is connected to the common fixed terminal 104 of another high-frequency relay 100 disposed adjacent to the common fixed terminal 104 by the transmission line 401 of the printed circuit board 400.

In this high-frequency relay, as shown in FIG. 5, one coil terminal 101 is connected to a positive power supply line 404 on the printed circuit board 400 by a transmission path 401 of the printed circuit board 400. The other coil terminal 101 is connected to the negative power supply line 405 on the printed circuit board 400.

When the coil terminals 101, 101 are connected by the transmission path 401 of the printed circuit board 400, the connection line L1 between the coil terminals 101, 101 and the power supply lines 404, 405 is naturally closed. Both the connection line L2 between the fixed terminals 102, 102 and the connection line L3 between the common fixed terminals 104, 104 intersect in plan view. For this purpose, as shown in FIG. 7, a location where the ground member 402 is not provided is secured on the back surface of the printed circuit board 400, a transmission path 406 is provided at that location, and the transmission path 406 provided on the back face and the transmission path on the front side are provided. A through-hole 407 for connecting the power supply line 401 to the coil terminal 101 is provided.
4, 405 is connected to the normally closed fixed terminal 10.
Connection line L2 between the terminals 2 and 102 and the common fixed terminal 10
It crosses over the connection line L3 between 4,104.

As described above, the attenuator circuit 300 including the high frequency relay 100 and the attenuator element 200 is connected to the normally open fixed terminal 10 of the high frequency relay 100.
When the common fixed terminals 104, 104 are connected to the common fixed terminals 104, 104, the attenuator circuit 300 operates to attenuate the signal intensity by a required amount without causing distortion.

[0011]

In the above-mentioned conventional high-frequency relay, the connection line L1 between the coil terminals 101, 101 and the power supply lines 404, 405 is connected between the normally closed fixed terminals 102, 102. In order to intersect the line L2 and the connection line L3 between the common fixed terminals 104, 104 in a plan view, a through hole 4 for connecting the transmission line 406 on the back surface of the printed circuit board 400 and the transmission line 401 on the front surface.
07, the connection line L1 is connected to the connection lines L2, L3
Therefore, the impedance matching of the high-frequency signal may not be sufficient due to the through holes 407 provided for the three-dimensional intersection.

The present invention has been made in view of the above points, and an object of the present invention is to provide a high-frequency relay having a sufficient impedance matching of a high-frequency signal.

[0013]

According to a first aspect of the present invention, there is provided a high frequency relay comprising: an electromagnet having a coil wound around an iron core; Terminal, normally closed fixed terminal, normally open fixed terminal paired with normally closed fixed terminal, common fixed terminal connected to either normally closed fixed terminal or normally open fixed terminal, normally closed A contact driven to be connected to either the side fixed terminal or the normally open side fixed terminal and the common fixed terminal, and an armature that is attracted to and separated from the iron core in accordance with excitation of the coil to drive the contact, A high-frequency relay that leads a normally closed fixed terminal, a normally open fixed terminal, and a common fixed terminal to the outside in an insulated state together with a coil terminal. Each of the open-side fixed terminals Deriving the common fixed terminal from between the lead-out positions, and between the lead-out positions of the normally closed fixed terminal and the common fixed terminal and between the lead-out positions of the normally open fixed terminal and the common fixed terminal. The coil terminals are respectively led out from between.

The high-frequency relay according to the second aspect is the first aspect.
In the high frequency relay described above, the normally closed fixed terminal is led out from one end and the normally open fixed terminal is led out from the other end.

The high frequency relay according to the third aspect is the second aspect.
In the high frequency relay described above, the normally closed fixed terminal is led out from one end in the longitudinal direction, and the normally opened fixed terminal is led out from the other end in the longitudinal direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present high-frequency relay will be described below with reference to FIGS. In FIG. 3, the coil 3 is omitted.

Numeral 1 denotes an iron core, which is formed of a magnetic material and has a substantially U-shaped magnetic pole portion 1a, 1b at both end legs, and is formed at a location separated by two integrally formed coil bobbins 2.
The coil 3 is wound to form an electromagnet 30a together with the coil 3. Both ends of the coil 3 are connected to a coil terminal 4 formed integrally with the coil bobbin 2. The coil terminal 4 is bent from the lead-out portion along the coil bobbin 2 as shown in FIG. 3 from the state where the coil terminal 4 is led out from the integrally formed coil bobbin 2.

Reference numeral 5 denotes a permanent magnet which is formed in a substantially flat plate shape, and is magnetized at three points so that both ends 5a and 5b are S poles, and a portion deviated from the center is an N pole. As described above, since the permanent magnet 5 is magnetized so that a portion deviated from the center becomes the N pole, a monostable operation is performed as described later. The permanent magnet 5 has both ends 5a,
5b are disposed inside the magnetic pole portions 1a, 1b at both ends of the iron core 1, and are welded to the iron core 1. The permanent magnet 5 forms an electromagnet block 30 together with the coil bobbin 2 and the electromagnet 30a.

Numeral 6 denotes an armature, which is made of a magnetic material and has both ends 6a, 6b in the longitudinal direction at the magnetic poles 1a, 1b at both ends of the iron core 1.
Is formed in a substantially rectangular flat plate shape so as to be able to face, and a ridge-shaped swing fulcrum 6c for swinging is provided at a central portion on one surface side.
Are provided in contact with the central part of the permanent magnet 5. In addition, the armature 6 is provided with a supported portion 6d which is swingably supported by a support portion 9a of a sub-base block 50 described later on both sides of the central portion.

Reference numeral 7 denotes an armature spring, which is formed in a substantially geometrical shape in a side view by a thin metal spring material, and is integrated with the armature 6 with its central piece 7a superimposed on the center of the other surface of the armature 6. To form an armature block 40 together with the armature 6. The leg piece 7b of the armature spring 7 is opposed to a contacted portion 10b of the contact support member 10 described later so as to be able to contact and separate therefrom.

Reference numeral 8 denotes a sub-base, which is made of a metal plate, and forms a sub-base block 50 together with an integrally formed insulator 9 made of a resin material. The sub-base 8 has the coil bobbins 2 placed on both ends in the longitudinal direction, supports the electromagnet block 30, and is insulated by the resin material insulator 9 in the coil terminal insertion holes 8a provided near the four corners. Thus, the coil terminal 4 is inserted. This subbase 8
Are provided at four locations near the center thereof, at the escape holes 8b through which the abutted portions 10b of the contact support members 10 described later are released.
Is provided. In addition, the sub-base 8 is provided with a support portion 9a for swingably supporting the supported portion 6d of the armature 6 on an insulator 9 made of a resin material provided on both sides of the central portion.

Reference numeral 10 denotes a contact supporting member, which is made of a resin material and has a substantially U-shaped base 10a in side view and its base 1a.
0a, a substantially cylindrical contact portion 10b integrated on both sides
Consists of The abutting portion 10b has a substantially hemispherical end surface that is in contact with the leg 7b of the armature spring 7. Reference numerals 11a and 11b denote contacts, which are respectively fixed through the base 10a of the contact support member 10 to form a contact block 60 together with the contact support member 10.

Reference numeral 12 denotes a return spring, which is formed in a substantially geometrical shape when viewed from the side by a plate-like metal spring material, and the contact support member 10 is mounted on the center piece 12a. This return spring 12
Is mounted on the bottom surface of the base 13 with the positioning portion 12c bent at the tip of the leg piece 12b positioned on the inner wall surface of the base 13 described later.

Reference numeral 13 denotes a base, which is formed of a metal material in the form of a shallow box, and is provided at both ends in the longitudinal direction and both sides at the center.
An insulator 14 made of a resin material is integrally formed, and forms a base block 70 together with the insulator 14. This base 1
3 places the sub-base 8 on the upper surface thereof and places the return spring 12 on the bottom surface with the positioning portion 12c of the return spring 12 positioned by the inner side surface. Also,
The base 13 has cutouts 13a near the four corners through which the coil terminals 4 pass.

Reference numeral 15 denotes a normally-closed fixed terminal, which is fixed through the insulator 14 at one end in the longitudinal direction of the base 13 and is led out to the outside in a plan view, so that the inner front end is closed. An outer front end portion is positioned on substantially the same plane as the outer bottom surface of the base 13 so as to face the one contact 11a to be opened and closed so as to be able to contact and separate therefrom.

Reference numeral 16 denotes a normally-open-side fixed terminal, which is fixed to the insulator 14 at the other end in the longitudinal direction of the base 13 and led out to the outside in a plan view, so that the inner front end has the normally open side. The outer end is located on the same plane as the outer bottom surface of the base 13 so as to be able to contact and separate from the other contact 11b for opening and closing.

Reference numeral 17 denotes a common fixed terminal, which is fixed through the insulator 14 at the central portion in the longitudinal direction of the base 13 and is led out to the outside in a plan view, so that the inner tip portion is in contact with both contacts 11a and 11b. The outer distal end portion is located on substantially the same plane as the outer bottom surface of the base 13.

On the other hand, the above-described coil terminal 4 is inserted into the coil terminal insertion hole 8a of the sub-base 8 and led out to the outside, then is passed through the notch 13a of the base 13, and thereafter, the outside of the base 13. It is bent outward so that it is located on substantially the same plane as the bottom surface.

As described above, four types of terminals, namely, the coil terminal 4, the normally closed fixed terminal 15, and the normally open fixed terminal 1
6. The state in which the common fixed terminal 17 is led out to the outside is a state in which the common fixed terminal 15 and the normally open fixed terminal 16 are located between the respective lead-out positions to the outside along the periphery in plan view. 17 to the outside, the position between the normally-closed fixed terminal 15 and the common fixed terminal 17 to the outside and the normally-open fixed terminal 16 and the common fixed terminal 17.
Are in a state where the coil terminals 4 are respectively led out from between the respective lead-out positions.

Reference numeral 18 denotes a case, which is fitted on the base 13;
The coil bobbin 2 abuts on the ceiling surface, and positions the electromagnet block 30, the sub base block 50, and the like between the ceiling surface and the base 13. This case 18 is the base 1
3 is sealed with a sealant (not shown).

The high-frequency relay 20 is used to form an attenuator circuit 300 together with an attenuator element 200 for attenuating the signal strength by a required amount without causing distortion, similarly to the conventional high-frequency relay 100.
In this case, the high-frequency relay 20 is provided on the printed circuit board 400 having a microstrip structure by soldering. As shown in FIG. 6, this microstrip structure is a structure in which a dielectric 403 is sandwiched between a transmission path 401 on the front side of a printed circuit board 400 and a ground member 402 on the back side, and is effective for impedance matching of high-frequency signals. It is.

In this high-frequency relay 20, the normally closed fixed terminals 15, 15 are connected by a transmission path 401 of a microstrip printed circuit board 400, and the normally open fixed terminals 16, 16 are connected to the attenuator element 200. The common fixed terminal 17 and the common fixed terminal 17 of another high-frequency relay 20 disposed adjacent to the common fixed terminal 17 are connected to each other by the transmission path 401 of the printed circuit board 400.
00 transmission path 401.

As shown in FIG. 1, the high-frequency relay 20 has one coil terminal 4 near one end in the longitudinal direction of the base 13 connected to the transmission path 401 of the printed circuit board 400.
Positive power supply line 404 on printed circuit board 400
And the other coil terminal 4 near the other end in the longitudinal direction of the base 13 is connected to the negative power supply line 405 on the printed circuit board 400.

Next, the operation of the high-frequency relay 20 and the attenuator circuit 300 will be described. Energize coil 3
When the coil 3 is excited, one end portion 6a of the armature 6 is attracted to the magnetic pole portion 1a at the other end of the iron core 1, and the ridge-shaped swing fulcrum 6c is located at the center of the permanent magnet 5. It swings while it is in contact. As a result, the armature spring 7 integrated with the armature 6 also swings and abuts on the contacted portion 10b of the contact support member 10 near the other end in the longitudinal direction of the base 13, and the contacted portion The contact support member 10 in which the armature spring 7 abuts on 10 b compresses the return spring 12 and is displaced toward the base 13.

As a result, the other contact 11b penetratingly fixed to the contact support member 10 is also displaced toward the base 13 and abuts on the normally open fixed terminal 16 and the common fixed terminal 17. As a result, the normally open fixed terminal 16 and the common fixed terminal 17 are connected by the other contact 11b. This state is shown in FIG. In this state, the high-frequency relay 20 and the attenuator element 20
The attenuator circuit 300 to which 0 is connected operates to attenuate the signal strength by a necessary amount without causing distortion.

When the energization of the coil 3 is stopped, one end 6a of the armature 6 is separated from the magnetic pole 1a at one end of the iron core 1 and the other end 6b of the armature 6 is It is attracted to the magnetic pole portion 1b at the other end, and reversely swings. as a result,
The armature spring 7 integrated with the armature 6 also reversely oscillates,
The contact support member 10 abutting on the abutted portion 10b of the contact support member 10 near one longitudinal end of the base 13 and abutting on the abutted portion 10b with the armature spring 7 compresses the return spring 12. And is displaced toward the base 13.
At this time, the return spring 12 that has been compressed is returned and deformed by its own spring force, and the contact support member 10 placed on the returned and returned return spring 12 is displaced away from the base 13.

As a result, one contact 11a penetratingly fixed to the contact support member 10 displaced toward the base 13 is displaced toward the base 13 and contacts the normally closed fixed terminal 15 and the common fixed terminal 17. The other contact 11b fixedly penetrating to the contact support member 10 which is in contact with and is displaced away from the base 13.
Is displaced away from the base 13.

As a result, the normally-closed fixed terminal 15 and the common fixed terminal 17 are connected by one contact 11a, and are commonly fixed by the normally-open fixed terminal 15 connected by the other contact 11b. The terminal 17 is separated. In this state, the attenuator circuit 300 does not perform the operation of attenuating the signal strength by a required amount without causing distortion.

In such a high-frequency relay, when the attenuator circuit 300 is arranged on the printed circuit board 400 having a microstrip structure and forms the attenuator circuit 300 together with the attenuator element 200, the normally closed fixed terminals 15 directly connected to each other. Paying attention to the respective lead-out positions of the normally-open fixed terminal 16 and the common fixed terminal 17 connected via the attenuator element 200 to the outside, the lead-out position of the normally-closed fixed terminal 15 along the periphery in plan view. The common fixed terminal 17 is drawn out from the space between the common fixed terminal 17 and the position where the normally opened fixed terminal 16 is drawn out.
7 and the normally open fixed terminal 16
And between the respective lead-out positions of the common fixed terminal 17,
Since the coil terminals 4 and 4 connected to the power supply lines 404 and 405 are respectively derived, a connection line L1 between the coil terminal 4 and the power supply lines 404 and 405 is connected between the normally closed fixed terminals 15 and 15. Connection line L2, connection line L3 connecting common fixed terminal 17, normally open fixed terminal 1
It does not cross any of the connection lines L4 between 6 and 16 in plan view.

Therefore, through-holes are formed in the printed circuit board 400 having a microstrip structure for three-dimensional intersection between the connection lines L1 and L2 and between the connection lines L1 and L3.
Therefore, unlike the conventional example, the impedance matching of the high-frequency signal can be sufficiently performed.

Further, since the normally closed fixed terminal 15 is led out from one end in the longitudinal direction and the normally open fixed terminal 16 is led out from the other end in the longitudinal direction, the fixed terminals 15 and 16 are separated in dimension in the longitudinal direction. Since the isolation characteristics can be improved, and the fixed terminals 15 and 16 are separated from each other in dimension in the longitudinal direction, a space for arranging the circuit is widened, so that the circuit design is facilitated.

The high-frequency relay of the present embodiment is a so-called two-pole high-frequency relay, but is not limited to a two-pole relay. For example, two one-pole high-frequency relays indicated by broken lines in FIG. Arrange the fixed terminals 1 on the normally closed side of each other.
The same effect can be obtained even if the attenuator circuit 300 is configured by connecting the normally open fixed terminals 16 and 16 via the attenuator element 200 while connecting the terminals 5 and 15 directly.

[0043]

According to the first aspect of the present invention, the normally closed fixed terminal and the attenuator element which are arranged on a microstrip structure and form an attenuator circuit together with the attenuator element are directly connected to each other. When two normally-open side fixed terminals and two common fixed terminals connected via the same are provided, along the periphery in plan view, between the lead-out position of the normally closed side fixed terminal and the lead-out position of the normally open side fixed terminal Is connected to the power supply line between the normally-closed fixed terminal and the common lead-out position and between the normally-opened fixed terminal and the common fixed terminal. The connection line between the coil terminal and the power supply line is connected to the connection line between the normally closed fixed terminals and the common fixed terminal. No longer intersect either in plan view is also the line. Therefore, it is not necessary to provide a through-hole in the microstrip structure due to the three-dimensional intersection between the connection lines, so that the impedance matching of the high-frequency signal can be sufficiently performed unlike the conventional example.

The high-frequency relay according to the second aspect is the first aspect.
In addition to the effects of the high-frequency relay described above, by leading the normally closed fixed terminal from one end and the normally open fixed terminal from the other end, the two fixed terminals are separated from each other, so that the isolation characteristics are improved.

According to the third aspect of the present invention, the normally closed fixed terminal is led out from one end in the longitudinal direction and the normally open fixed terminal is led out from the other end in the longitudinal direction. Because of the separation, the effect of the high-frequency relay according to claim 2 in which the isolation characteristics are improved can be further achieved.

[Brief description of the drawings]

FIG. 1 is an attenuator circuit diagram illustrating a terminal leading position of a high-frequency relay according to an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is an exploded perspective view excluding a case and an electromagnet block according to the first embodiment.

FIG. 4 is a perspective view of the same case and an electromagnet block.

FIG. 5 is an attenuator circuit diagram showing a terminal leading-out position of a conventional high-frequency relay.

FIG. 6 is a sectional perspective view showing a microstrip structure.

FIG. 7 is a cross-sectional perspective view showing a through hole provided so that both connection lines cross three-dimensionally.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron core 3 Coil 4 Coil terminal 6 Armature 11a One contact 11b The other contact 15 Normally-closed fixed terminal 16 Normally-opened fixed terminal 17 Common fixed terminal 20 High-frequency relay 30a Electromagnet

Claims (3)

[Claims] 1. An electromagnet in which a coil is wound around an iron core, two coil terminals connected to the coil in a pair, a normally closed fixed terminal, and a normally open side paired with the normally closed fixed terminal. Driving so as to be connected to the fixed terminal, the common fixed terminal connected to either the normally closed fixed terminal or the normally opened fixed terminal, and the normally closed fixed terminal or the normally opened fixed terminal to the common fixed terminal Contact, and an armature attracted to and separated from the iron core in response to excitation of the coil to drive the contact,
A high-frequency relay that leads the normally closed side fixed terminal, the normally open side fixed terminal, and the common fixed terminal to the outside in an insulated state together with the coil terminal, wherein the normally closed side fixed terminal and the normally Deriving the common fixed terminal from between the respective lead-out positions of the open-side fixed terminal, and between the normally-closed-side fixed terminal and the respective lead-out position of the common fixed terminal, and between the normally-opened fixed terminal and the common fixed terminal. A high-frequency relay, wherein the coil terminals are respectively led out from between respective lead-out positions. 2. The high-frequency relay according to claim 1, wherein the normally closed fixed terminal is led out from one end and the normally open fixed terminal is led out from the other end. 3. The high-frequency relay according to claim 2, wherein the normally closed fixed terminal is led out from one end in the longitudinal direction, and the normally opened fixed terminal is drawn out from the other end in the longitudinal direction.