JP2001217051A - Terminal for electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal for an electronic equipment, which suppresses high frequency noise of output signal in an electronic equipment. SOLUTION: A center conductor 2 is fixed penetrating into a chassis of an equipment, electrically insulated from a chassis 7, and an insulating body 5 includes is to magnetic powder 6 such as ferrite.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device, for example, a terminal for an electronic device used as an output terminal of a power amplifier of a sound reproducing apparatus.

[0002]

2. Description of the Related Art Leakage of unnecessary electromagnetic waves from electronic devices and systems may interfere with other devices.
It is necessary to suppress the emission of unnecessary electromagnetic waves as much as possible. 2. Description of the Related Art For example, power amplifiers using a switching method in an output stage are widely used as electronic devices in power amplifiers of sound reproducers for the purpose of suppressing generation of heat, increasing conversion efficiency, and reducing space. However, since this switching method contains a very large amount of high-frequency noise components due to switching, a measure for suppressing this noise has been required.

Therefore, in a conventional power amplifier of a sound reproducing apparatus, before inputting to an output terminal, a ferrite bead, for example, an inductance element obtained by sintering ferrite powder is attached to a wiring material connected to a speaker terminal. To suppress high-frequency noise by generating high-frequency loss, or as a lead component, attach an inductance element obtained by sintering ferrite powder to wiring material and insert it on a wiring board to generate high-frequency loss. To suppress high-frequency noise.

[0004]

By the way, in the above-mentioned configuration for suppressing high-frequency noise in the power amplifier of the conventional sound reproducing apparatus, It costs money. 2. It takes a lot of work to entangle the wiring material. 3. Space efficiency is reduced because ferrite beads require a certain volume. There were problems such as.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an electronic device terminal capable of suppressing all of the above-mentioned problems and capable of suppressing high-frequency noise.

[0006]

In order to achieve the above-mentioned object, a terminal for electronic equipment according to the present invention is mounted through a chassis of the terminal equipment and is electrically insulated from the chassis. The center conductor is attached to the chassis and has an insulator that is electrically insulated, and a magnetic powder is contained in at least a portion of the insulator orthogonal to the center conductor and the chassis.

In this structure, the insulator is formed of a synthetic resin mold, and the magnetic powder may be ferrite powder.

The electronic device terminal according to the present invention is mounted so as to penetrate a chassis of the electronic device and is electrically insulated from the chassis. And at least a part of the central conductor is approached to the chassis at a required interval.

Further, the electronic device terminal according to the present invention is provided so as to penetrate a chassis of the electronic device, and has a center conductor electrically insulated from the chassis, and at least a portion of the center conductor orthogonal to the chassis. It has a coaxial conductor consisting of an outer conductor surrounded by an insulator, a high dielectric substance is arranged between the center conductor and the outer conductor, and the outer conductor is connected to the chassis.

[0010] In the terminal for electronic equipment according to the present invention configured as described above, an insulating portion that electrically insulates the center conductor from the chassis includes a magnetic substance powder to form an insulator that is the insulating portion. By doing so, means for preventing leakage and emission of unnecessary electromagnetic waves due to electromagnetic wave absorption by merely allowing an output signal to pass through this terminal is provided. That is, the terminal for an electronic device according to the present invention can generate high-frequency loss due to the magnetic powder only by passing an output signal through the center conductor, and can reduce high-frequency noise generated in the output. For this reason,
Not only the space efficiency is good and the cost can be reduced, but also there is no need for post-processing or post-processing for attaching ferrite beads to the wiring material as in the related art.

Further, the electronic device terminal according to the present invention has a structure in which the center conductor and the chassis are close to each other.
The center conductor and the chassis are short-circuited at high frequency to form a distributed capacitance, thereby suppressing high-frequency noise leaking to the outside.

Further, in the terminal for electronic equipment according to the present invention, a high dielectric conductor is arranged between the center conductor and the outer conductor of the coaxial conductor.
With the configuration in which the outer conductor is connected to the chassis, the center conductor of the coaxial conductor and the chassis are short-circuited at a high frequency, a capacitance is formed, and high-frequency noise leaking to the outside can be suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a terminal for electronic equipment according to the present invention is applied to a terminal for a power amplifier of a sound reproducing apparatus. It is.

FIG. 1 shows a first embodiment. In a terminal 1 of the first embodiment, one end of a center conductor 2 is formed as an input end 3 and the other end is formed as an output end 4. An insulator 5 is formed by molding with an electrical insulator such as a synthetic resin on an outer peripheral portion of an intermediate portion of the center conductor 2, and the insulator 5 contains a magnetic powder 6 such as ferrite mixed therein. ing.

The insulator 5 of the terminal 1 also serves as a mounting body for the equipment chassis 7, has an outer diameter substantially equal to the inner diameter of the mounting hole 8 of the equipment chassis 7, and has an end on the output end 4 side of the center conductor 2. The part is formed with a flange portion 5a that contacts the plate surface of the equipment chassis 7. A screw groove 4a is formed at the output end 4 of the center conductor 2, and a cord presser 9 is screwed thereto.

The terminal 1 of the first embodiment constructed as described above is attached to the equipment chassis 7 by fitting the insulator 5 into the mounting hole 8 so that the center conductor 2 is attached to the equipment chassis 7. , The input end 3 and the output end 4 protrude toward one surface and the other surface, respectively.

By attaching the terminal 1 to the equipment chassis 7 as described above, the magnetic powder 6 contained in the insulator 5 interposed between the center conductor 2 and the equipment chassis 7 becomes an inductor, and the center conductor 2 is output. The passage of the signal alone serves as a means for preventing leakage radiation due to electromagnetic wave absorption.

Therefore, the terminal 1 of the first embodiment
Is such that the output of the power amplifier of the sound reproducing apparatus is input to the input terminal 3 which is one end of the center conductor 2, and the frequency characteristic of the output signal of the input power amplifier at this time is, for example, up to 20 kHz as shown in FIG. Assuming that the signal includes a component in which the desired sound reproduction signal and the other high-frequency noise of, for example, around 1 GHz are mixed, the magnetic powder 6 is mixed between the center conductor 2 and the equipment chassis 7 as described above. Since the insulator 5 included is included, a high-frequency loss occurs in this portion, and the frequency characteristic of the output signal at the output terminal 4 on the other end side of the center conductor 2 is as shown in FIG. High frequency noise around 1 GHz will be reduced.

As described above, high-frequency loss due to the magnetic powder 6 contained in the insulator 5 is generated only by passing the output signal through the terminal 1, and high-frequency noise generated at the output terminal 4 can be reduced.

Next, a second embodiment will be described with reference to FIG. In the terminal 11 of the second embodiment shown in FIG. 4, one end of a center conductor 12 is formed as an input end 13 and the other end is formed as an output end 14, and an intermediate conductor 15 Are formed integrally with each other, and on the outer peripheral portion including the intermediate conductor portion 15 at the intermediate portion of the central conductor 12,
An insulator 16 is formed by molding with an electrical insulator such as a synthetic resin. The insulator 16 is thin on the end surface side of the intermediate conductor 15.

The insulator 16 of the terminal 11 is the first
In the same manner as in the embodiment, it also serves as a mounting body for the equipment chassis 7, has an outer diameter substantially equal to the inner diameter of the mounting hole 8 of the equipment chassis 7, and is attached to the end of the center conductor 12 on the output end 14 side. Is a flange portion 1 which is in contact with the plate surface of the equipment chassis 7
6a is formed, and a screw groove 14a is formed at the output end 14 of the center conductor 12, and a cord presser 17 is screwed thereto.

The terminal 11 of the second embodiment constructed as described above is provided with the center conductor 12 by fitting the insulator 16 into the mounting hole 8 in the equipment chassis 7.
Is located through the device chassis 7 and the input terminal 1
3 and the output end 14 are protruded toward one surface and the other surface, respectively, and the outer end surface of the intermediate conductor portion 15 is at least insulated by the inner surface of the mounting hole 8 of the equipment chassis 7.
Are opposed to each other with an interval of the thickness dimension of the thin portion. The outer end surface of the intermediate conductor portion 15 of the center conductor 12 and the device chassis 7
Is formed as a capacity gap 18 with the inner surface of the mounting hole 8.

Therefore, the terminal 1 of the second embodiment is
Reference numeral 1 denotes an intermediate conductor 15 of the center conductor 12 and a mounting hole 8 of the equipment chassis 7 by allowing the output signal of the power amplifier of the sound reproducing device to pass through the center conductor 12 in the same manner as in the first embodiment. Is short-circuited at a high frequency to form a distributed capacitance, and high-frequency noise mixed in the output signal is reduced.

As described above, also in the second embodiment, the high-frequency noise generated at the output terminal 14 by short-circuiting at a high frequency in the capacitance gap 18 just by passing the output signal to the terminal 11 to form a distributed capacitance. Can be reduced.

FIG. 5 shows a third embodiment.
In the terminal 21 of the third embodiment shown in FIG. 5, one end of a center conductor 22 is formed as an input end 23, and the other end is formed as an output end 24. The outer conductor 26 is provided on the outer periphery of the insulator 25 to form a coaxial conductor with the center conductor 22. The center conductor 22 and the outer conductor 26 and a high dielectric conductor 27 is interposed.

The insulator 25 of the terminal 21 also serves as a mounting body for the equipment chassis 7 and is formed so that the outer diameter of the outer conductor 26 provided on the outer circumference is substantially equal to the inner diameter of the mounting hole 8 of the equipment chassis 7. A flange portion 25a facing the plate surface of the device chassis 7 is formed at an end of the center conductor 2 on the output end 24 side, and a flange portion 26a is formed on the outer conductor 26 corresponding to the flange portion 25a. The lever flange 26a is in contact with the plate surface of the equipment chassis 7. A screw groove 24a is formed at the output end 24 of the center conductor 22, and a cord retainer 28 is screwed thereto.

The terminal 21 of the third embodiment constructed as described above fits the insulator 25 into the mounting hole 8 of the equipment chassis 7 via the outer conductor 26 to connect the outer conductor 26 to the equipment chassis 7. By connecting and attaching to the device chassis 7 at the outer peripheral surface and the flange portion 26a, the center conductor 22 is positioned so as to penetrate the device chassis 7, and the input end 23 and the output end 24 are respectively provided on one surface and the other surface. Projected to the side.

As described above, by attaching the terminal 21 to the equipment chassis 7, the center conductor 22 and the outer conductor 26, that is, the equipment chassis 7 side are short-circuited at a high frequency via the high dielectric conductor 27 to form a distributed capacitance. Is done.

Therefore, the terminal 2 of the third embodiment is
1, the output terminal 2 is formed by the distributed capacitor formed by short-circuiting at high frequency by the high dielectric conductor 27 only by passing the output signal of the power amplifier of the sound reproducing device through the center conductor 22.
4 can reduce high-frequency noise.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and can be variously modified without departing from the gist of the present invention.

For example, the shape, material and the like of each member may be any as long as the object of the present invention described above is achieved. And
The terminals need not have a single configuration and shape, but may have a plurality of terminals. Also in this case, space efficiency is good and reduction of high frequency noise can be expected.

[0032]

As described above, the terminal of the electronic device according to the present invention is constructed so that high-frequency noise can be reduced by generating a high-frequency loss by electromagnetic wave absorption only by allowing an output signal to pass therethrough. Higher frequency short-circuit with the chassis to form distributed capacitance and reduce high-frequency noise reduces the space for mounting ferrite beads, which has been used in the past. And a lead or the like for inserting a ferrite member can be eliminated, so that power loss can be suppressed. Further, the number of steps for suppressing unnecessary high-frequency noise can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side view of an example of an electronic device terminal according to the present invention.

FIG. 2 is a frequency characteristic diagram of an input signal of a terminal for an electronic device shown in FIG.

FIG. 3 is a frequency characteristic diagram of an output signal of a terminal for an electronic device shown in FIG. 1;

FIG. 4 is a partially cut-away side view of another example of the electronic device terminal according to the present invention.

FIG. 5 is a partially cut-away side view of still another example of the electronic device terminal according to the present invention.

[Explanation of symbols]

1,11,21 terminal, 2,12,23 center conductor, 5,16,25 insulator, 6 magnetic powder, 7
‥‥ Equipment chassis, 15 ‥‥ Intermediate conductor, 18 ‥‥ Capacity gap, 26 ‥‥ Outer conductor, 27 ‥‥ High dielectric conductor

Claims (4)

[Claims] 1. A center conductor penetrated through a chassis of an electronic device and electrically insulated from the chassis, and an insulator attached to the chassis and electrically insulated from the chassis. A terminal for electronic equipment, wherein a magnetic powder is contained in at least a portion of the insulator substantially perpendicular to the center conductor and the chassis. 2. The terminal for an electronic device according to claim 1, wherein the insulator is formed of a synthetic resin mold body, and the magnetic substance powder uses a ferrite powder. 3. A center conductor penetrating through a chassis of the electronic device and electrically insulated from the chassis, and an insulator that attaches the center conductor to the chassis and electrically insulates the chassis. An electronic device terminal, wherein at least a part of the center conductor is brought close to the chassis at a required interval. 4. A center conductor provided so as to penetrate a chassis of the electronic device and electrically insulated from the chassis, and an outer portion surrounding at least a portion of the center conductor orthogonal to the chassis via an insulator. A terminal for electronic equipment, comprising: a coaxial conductor formed of a conductor; a high dielectric substance disposed between the center conductor and the outer conductor; and the outer conductor being connected to the chassis.