JPH0718412U - Noise absorber - Google Patents

Abstract

(57) [Summary] [Purpose] The noise absorption effect can be confirmed instantly by connecting and disconnecting the short-circuit member. A noise absorbing member in which a conductive member penetrates a magnetic body is combined with a short-circuit member capable of arbitrarily short-circuiting the conductive member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This device is intended to reduce unnecessary electromagnetic waves (hereinafter referred to as noise) generated by electronic devices and the like, and is used for the purpose of preventing mutual interference between electronic devices such as digital devices such as information processing devices. . In particular, this device refers to a measure for reducing the noise of the device, which is usually called a noise measure, but it is used in this noise measure stage.

[0002]

[Prior art]

 The noise generated by electronic devices interferes with each other and causes malfunctions of the devices, which is regarded as a serious problem in the information society. For this reason, the noise emitted from devices has come to be strictly regulated. Although methods such as shielding, grounding, and filtering are used as measures against noise, it is often difficult to solve them easily even with all of these means. Therefore, it takes a considerable amount of time to take measures and evaluate. At the noise countermeasure stage, everyone wants to be able to confirm the countermeasure effect instantly. In order to compare the effect of a noise absorbing member, which is usually called an earth inductor, as shown in the embodiment, with and without it, in order to compare the effect, a magnetic substance is not added. If you attach a strap, check the data in this case, remove it after this, attach an earth inductor with a magnetic substance attached, take data, compare these two data and confirm this effect. I won't. In other words, it was impossible to confirm the effect instantly, which was a source of dissatisfaction at the countermeasure site.

[0003]

[Issues to be solved by the device]

 This invention intends to instantly realize the case where the above-mentioned magnetic strap is added to the earth strap, that is, the earth inductor, and the case where it is not attached.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, this invention is a combination of a noise absorbing member and a short-circuiting member that can arbitrarily short-circuit a conductive member penetrating a magnetic body.

[0005]

[Action]

 In the present invention having the above-described structure, for example, in the case of the earth inductor exemplified, the short-circuit member 4 is connected to one end of the conductive member 2 of the earth inductor 1, and the clip 5 added to the remaining end is brought into contact with 2. By doing so, both ends of the earth inductor are electrically short-circuited, and the same state as when no magnetic substance is added is instantly realized.

[0006]

【Example】

 1 is a perspective view of an embodiment in which a conductive member 2 is penetrated through a magnetic body 3 for one turn, and a terminal 6 and a clip 5 are formed by using a braided wire as a conductive member and a short-circuit member. Added. 2 is a perspective view of an embodiment in which the conductive member 2 is wound around the magnetic body 3 for 5 turns, and FIG. 3 is an electric circuit diagram of the embodiment of FIG. In the embodiment shown in FIG. 3, it is convenient to use a bare wire as the conductive member so that the clip 5 can be brought into contact with any position. In this case, it is needless to say that the wound conductive members do not come into contact with each other, but in order to minimize the stray capacity between the lines, it is desirable that the conductive members are not close to each other. Although the earth inductor is illustrated in the figure, other embodiments included in the present invention include, for example, a normal mode choke coil, a common mode choke coil, and a bead inductor.

[0007]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. For example, when connecting the ground of the printed circuit board to a metal housing, which is a low impedance ground, use a ground inductor in between to reduce the common mode noise generated by the connection impedance between these by the magnetic material converting it into thermal energy. To be done. In such a case, the effect can be instantly confirmed by intermittently connecting the short-circuit member, and extremely quick noise countermeasures can be realized. Similarly, in the case of a wound inductor, it is possible to easily select an arbitrary number of turns, avoid resonance points, and eliminate the hassle of replacing inductors with different numbers of turns. Produce a great effect.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment in which a conductive member penetrates one turn.

FIG. 2 is a perspective view of an embodiment in which the conductive member has 5 turns.

FIG. 3 is an electric circuit diagram of the embodiment shown in FIG.

[Explanation of symbols]

 1 ground inductor 2 conductive member 3 magnetic material 4 short-circuit member 5 clip 6 terminal

Claims (1)

[Scope of utility model registration request] A noise absorbing member in which a conductive member penetrates a magnetic body, and a short-circuiting member which can short-circuit the conductive member is combined.