JPH06251678A - High frequency relay - Google Patents

Abstract

PURPOSE:To lessen disorder (notch) in a high frequency waveform. CONSTITUTION:A hole 21 and holes 22, 23 are formed wherein the hole 21 is to protrude the lower face of a metal base 16 out of the rear side of a body 1 and the holes 22, 23 are to expose the parts such as an iron core 5, a yoke 6, which compose a magnetic circuit out of the rear side of the body 1. The metal parts of a magnetic circuit facing to the rear side of the body 1, in other words, a yoke 6, an iron core 5, a metal base 16, etc., are exposed out of the rear side and fixed in a substrate with a sealing material, so that floating electrostatic capacity of the metal parts is earthed. As a result, stable high frequency property with little waveform disorder (notch) can be obtained.

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 Iron cores, yokes, ground terminals, etc. are used in high-frequency relays, and these members are mounted in a base.

[0003]

In the above high frequency relay, when there are metal parts such as an iron core, a yoke, and a ground terminal which are not connected to the ground in the body, stray capacitance is generated,
It has been a cause of turbulence (notch) in a high-frequency waveform (for example, insertion, isolation, return loss).

The present invention has been made in view of the above points, and provides a high-frequency relay for reducing disturbance (notch) in a high-frequency waveform.

[0005]

SUMMARY OF THE INVENTION The present invention provides a high frequency relay having a metal base supporting an iron core, a yoke, etc. constituting a magnetic circuit, and a fixed terminal via an earth terminal and an insulator. A hole for exposing the above-mentioned member from the lower surface of the body is bored in the bottom of the body in which iron, a metal base, etc. are stored.

[0006]

According to the present invention, by exposing the metal part of the magnetic circuit from the back surface of the body, the metal part can be directly grounded to the substrate. Therefore, by grounding the excess stray capacitance in the high frequency circuit, It is possible to obtain stable high frequency characteristics with less disturbance.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, the entire high frequency relay will be described with reference to FIG. Inside the body 1 made of insulating material, the coil block 2
Will be delivered. The coil block 2 includes a coil bobbin 3 and a coil 4 wound around the outer circumference of the coil bobbin 3.
And an iron core 5 arranged in the coil bobbin 3.

A pair of substantially U-shaped yokes 6 are arranged on both sides of the coil block 2. A card 7 is arranged above the coil block 2, and on both sides of this card 7,
A contact spring block 8 is provided. Contact spring block 8
Is provided with contact springs 9 on both sides thereof, and a pair of armatures 10 and magnets 11 are disposed on both ends of the card 7.

Further, a balance spring 12 is provided above the card 7, and a case 13 is provided over the balance spring 12. In addition, the fixed terminal 1 that comes into contact with and separates from the contact spring 9
5, equipped with a grounding terminal 19, these are metal base 16
Is installed in. That is, a plurality of holes 17 are drilled in the metal base 16, and the insulator 14 is inserted into these holes 17.
The fixed terminal 15 and the ground terminal 19 are attached via the.

Further, a metallic shield plate 18 covering the fixed terminal 15 and the ground terminal 19 is provided on the metal base 1.
6 is disposed on the upper surface. In addition, 20 is a coil terminal. Here, at the bottom of the body 1, as shown in FIG.
Holes 21 to 23 are formed. That is, metal base 1
Hole 21 for projecting the lower surface of 6 from the back surface of the body 1
Similarly, holes 22 and 23 for exposing the components constituting the magnetic circuit, such as the iron core 5 and the yoke 6, from the back surface of the body 1.
Is provided.

The metal parts of the magnetic circuit facing the back surface of the body 1, that is, the yoke 6, the iron core 5, and the metal base 16 are provided.
The stray capacitance of these metal components can be grounded by exposing the above components from the back surface of the body 1 and fixing them to the substrate with a sealing material. Therefore, it is possible to obtain stable high-frequency characteristics with little waveform disturbance (notch).

FIG. 3 is a sectional view taken along line AA of FIG. 2A, and FIG. 4 is a sectional view taken along line BB of FIG. 2A. (Embodiment 2) FIGS. 5 to 8 show an embodiment in which stray capacitance between fixed terminals is cut off, and a shield block 31
Is formed in a substantially U shape, and the contact springs 32, 33
Is formed in a substantially Z shape.

Fixed terminals 34 to 35 are provided on the central upper portion and both sides of the shield block 31 with respect to the shield block 31 via insulators.
The contacts are switched by vertically moving the card 39 fixed to the Nos. 2 and 33. FIG. 5 shows a state in which the fixed terminals 34 and 36 are connected by the contact spring 33 and the fixed terminal 35 is separated. In this state,
Since the upper part of the contact spring 32 whose upper part is in contact with the bottom part 37 of the shield block 31 is located between the fixed terminals 34 and 35, leakage of high frequency from the fixed terminal 34 to the fixed terminal 35 is prevented.

In the state shown in FIG. 6, the contact spring 32 connects the fixed terminals 34 and 35 with each other and the fixed terminal 36 is separated. In this state, the lower part of the contact spring 33 whose upper part is in contact with the ceiling surface of the shield block 31 is located between the fixed terminals 34 and 36. Therefore, it is possible to prevent high frequency from leaking from the fixed terminal 34 to the fixed terminal 36.

With this configuration, the stray capacitance of the fixed terminal itself promotes the shield effect between the solid terminals by the corner portions of the shield block, and good isolation can be obtained. (Embodiment 3) FIGS. 9 to 11 show an embodiment in which stray capacitances between fixed terminals are cut, and three fixed terminals are provided in a box-shaped shield case 41 made of metal via an insulator 42. 43 to 45 are arranged. In addition, each fixed terminal 43
Between 45 and 45 is provided a metal isolation wall 46 which is electrically connected to the shield case 41.

The contact springs 47 and 48 are formed in a U-shape, and move in parallel to open and close the contacts. In the state shown in FIG. 9, the fixed terminals 43 and 44 are electrically connected by the contact spring 48, and the fixed terminal 45 is separated. At this time, the contact spring 47 contacts the left metal isolation wall 46 and is grounded.

Also, when the contact springs 47 and 48 move to the right, the contact spring 48 comes into contact with the right metal isolation wall 46 as in the above. Therefore, the stray capacitance of the fixed terminal itself promotes the shield effect by providing the metal isolation wall 46, and good isolation can be obtained.

[0018]

According to the present invention, in a high-frequency relay having a metal base supporting an iron core, a yoke, etc. constituting a magnetic circuit, and a ground terminal and a fixed terminal via an insulator,
Since the hole for exposing the above-mentioned member from the lower surface of the body is formed at the bottom of the body that houses the iron core, yoke, metal base, etc., by exposing the metal parts of the magnetic circuit from the back surface of the body, The metal component can be directly grounded to the substrate. Therefore, by grounding an extra stray capacitance in the high frequency circuit, it is possible to obtain stable high frequency characteristics with less waveform distortion.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an entire high frequency relay according to an embodiment of the present invention.

FIG. 2A is a plan view of the same high frequency relay.
(B) is a side view of the same high frequency relay. (C) is a bottom view of the same high frequency relay.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB in FIG. 2 (a).

FIG. 5 is an explanatory diagram of Example 2 of the above.

FIG. 6 is an explanatory diagram of the above.

FIG. 7 is a perspective view of the above contact spring.

FIG. 8 is a plan view of the above contact spring.

9 (a) to 9 (c) are a plan view, a lateral cross-sectional view, and a side cross-sectional view of a contact portion of the third embodiment.

FIG. 10 is a perspective view of the above contact spring.

FIG. 11 is a side view of the contact spring of the same.

[Explanation of symbols]

 1 Body 5 Iron Core 6 Yoke 14 Insulator 15 Fixed Terminal 16 Metal Base 21 Hole 22 Hole 23 Hole

Claims (1)

[Claims] 1. A high-frequency relay having a metal base that supports an iron core, a yoke, and the like that form a magnetic circuit and a ground terminal and a fixed terminal through an insulator, wherein the iron core, the yoke, and
A high frequency relay characterized in that a hole for exposing the above-mentioned member from the lower surface of the body is bored in the bottom of the body for accommodating a metal base or the like.