JPH0557813U - High-frequency noise suppression core mounting structure - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Keeping the appearance of the equipment beautiful with respect to the function of suppressing the emission of high-frequency noise in the ground wire. A core accommodating member 81 accommodating a high frequency noise suppressing core is provided with an attaching member 82 for attaching the core accommodating member 81 to the chassis 7 of the device and an external connection terminal, and an internal lead wire. The internal grounding electric wire 9a connected to the external connection terminal is extended from the core housing member 81. The core housing member 81 is attached to the attachment member 8
When attaching to the chassis 7 by 2, the internal grounding wire 9
a is wound around the core portion of the core accommodating member 81 and its end is connected to the chassis 7, while the internal grounding electric wire 9a
The other end is connected to the external grounding electric wire 9b by using the connecting screw 92 with the external connection terminal.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a mounting structure of a high-frequency noise suppressing core used for suppressing high-frequency noise radiation in a grounding wire portion.

[0002]

[Prior Art]

 FIG. 3 is a circuit diagram of an apparatus that requires functional consideration to suppress radiation of high frequency noise in order to maintain normal operation. In the figure, 1 is an AC plug, 2 is a power switch, 3 is an AC line filter, 4a, 4b and 4c are various functional circuits, 5 is a digital circuit, 6 is a capacitor, and 7 is a chassis for mounting on a board. , 8 are high frequency noise suppressing cores, and 9 is a grounding electric wire.

In this device, high-frequency noise flowing from the AC line filter 3 and the digital circuit 5 through the capacitor 6 and the like flows into the external ground wire 9 through the chassis 7. At this time, the high-frequency noise is wound around the ground wire 9. A certain high frequency noise suppressing core 8 acts so as to suppress high frequency noise, whereby the radiation of high frequency noise from the grounding wire 9 is kept below a specified level.

FIG. 4 shows a main part of a conventional high-frequency noise suppression core mounting structure applied to a device having an equivalent relationship to the circuit diagram. As is clear from the figure, in this type of conventional device, regarding the mounting of the high-frequency noise suppression core in the grounding wire portion, a mounting structure dedicated to the location has not been proposed. That is, in the past, when it was necessary to suppress high-frequency noise in the grounding electric wire part, a normal high-frequency noise suppressing core 8 composed of a single body was prepared, and the grounding electric wire 9 was wound around the core 8. Then, the end portion of the grounding electric wire 9 is connected to the external connection terminal 10 of the apparatus.

In such a conventional mounting structure, the high-frequency noise suppression core 8 is exposed to the outside of the device, which spoils the appearance of the device. Moreover, in this conventional structure, the high-frequency noise suppression core 8 is left to the wiring of the grounding electric wire 9 and moves easily, which may hinder the operation of the apparatus.

In order to eliminate such inconvenience, a structure in which a dedicated noise suppressing device having a built-in high frequency noise suppressing core is fixed to the chassis is conceivable. In this case, however, the structure becomes large and the device becomes large. The cost was inevitable.

[0007]

[Problems to be solved by the device]

 As described above, in the above-mentioned conventional device, regarding the high-frequency noise suppression function in the grounding wire portion, the high-frequency noise suppression core around which the grounding wire is wound is simply arranged outside the device. There is a problem in that it is not preferable and that it is easy to move and hinder the operation of the device.

The present invention eliminates this problem and allows the high-frequency noise suppression core to be firmly fixed without being exposed to the outside of the device, without impairing the appearance of the device and impairing the operation of the device. It is an object of the present invention to provide a mounting structure for a high frequency noise suppressing core in a grounding electric wire that does not need to be mounted.

[0009]

[Means for Solving the Problems]

 The high-frequency suppressing core mounting structure of the present invention accommodates the high-frequency noise suppressing core in a core housing member having at least a covering portion of the core, and the core housing member is externally connected to the mounting member for the corresponding portion. A terminal for internal use and an electric wire for internal grounding extended by a predetermined length from the terminal for external connection are provided, and the core accommodating member is attached to the chassis of the device by the attaching member, and only the external connecting terminal is connected to the device. After mounting so as to project to the outside, the internal grounding wire is wound around the core covering portion of the core housing member a predetermined number of times and then connected to the chassis, and from the outside of the device to the external connection terminal. It is characterized by connecting an electric wire for external grounding.

[0010]

[Action]

 According to the present invention, the core accommodating member accommodating the core for suppressing high frequency noise is provided with an attaching member and an external connecting terminal capable of attaching the core accommodating member to the chassis from the inside of the device. The connected internal grounding wire is extended by a specified length from its core housing member. When attaching the core housing member to the chassis, the core housing member is fixed to the chassis from the inside of the device by the mounting member, and the internal grounding wire is attached to the core portion of the core housing member a predetermined number of times. After wrapping, connect one end to the chassis. On the other hand, outside the apparatus, an external grounding wire is connected to an external connection terminal that protrudes outside the apparatus when the core accommodating member is attached to the chassis.

According to the core mounting structure of the present invention, a high-frequency noise suppressing action can be provided in the apparatus according to the number of windings of the internal grounding wire around the core portion of the core housing member. At this time, the only part exposed to the outside of the device is the external grounding wire and its connecting part, not only giving it a clean appearance, but also fixing the core accommodating member inside the device so that there is no hindrance to the operation of the device. be able to.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a main part of a structure according to an embodiment of the present invention, in which a high-frequency noise suppression core (ferrite) 8 has a core shape having a cavity at its center (hereinafter, referred to as It is accommodated in the core accommodating member 81 at a core portion). An attaching member 82 for attaching the core accommodating member 81 to the chassis of the device from the inside of the device is provided at a protruding portion of the core accommodating member 81 from the core portion. In addition, an inner conductive wire 83 is included inside the protruding portion of the core accommodating member 81, and one end of this inner conductive wire 83 is connected to an external connection terminal 84 provided at a predetermined position on the outer peripheral surface of the core accommodating member 81. Has been done. Further, the other end of the internal conducting wire 84 is connected to the internal grounding electric wire 9a extending from the core accommodating member 81 by a predetermined length. A chassis connecting terminal 91 for connecting to the chassis of the apparatus is provided at the other end of the internal grounding wire 9a. On the other hand, a connecting screw 92 is provided to allow external connection to the external connection terminal 84 of the core housing member 81.

The internal grounding electric wire 9a described above has a sufficient length to obtain a specified high frequency noise suppression effect by being wound around the core portion of the core housing member 81. In addition, the path connecting to the chassis connecting terminal 91, the internal grounding electric wire 9a, the internal conducting wire 83, the external connecting terminal 84, and the connecting screw 92 is made of an insulating material as the material of the core housing member 81 and the mounting member 82. The structure is insulated from them.

Next, a procedure for actually attaching the core accommodating member 81 having such a structure to a location of the corresponding device that requires grounding will be described with reference to the attachment structure shown in FIG. In this attachment procedure, first, the core accommodating member 81 is attached to the chassis 7 from inside the device by the attaching member 82. As a result, the core accommodating member 81 is completely fixed to the chassis 7 with a part thereof, that is, the external connection terminal 84 exposed to the outside of the apparatus.

Here, as an example of the structure of the mounting member 82, for example, as shown in the same drawing, an opening is previously provided at a predetermined mounting position of the chassis 7, and the mounting corresponding to the shape is formed in the opening. A structure in which the member 82 is fixed by inserting it can be considered.

In this way, after the core accommodating member 81 is attached to the chassis 7, the internal grounding electric wire 9 a is wound around the core portion of the core accommodating member 81 a sufficient number of times to sufficiently suppress high frequency noise, and The end portion is connected to the chassis 7 by the chassis connecting terminal 91.

At this time, since the external connection terminals 84 (not shown in FIG. 2) of the core housing member 81 are exposed to the outside of the device, the external connection terminals 84 are not connected. The screw 92 is used to connect the external grounding electric wire 9b from the outside of the apparatus.

The mounting structure of the present invention realized through the above procedure is such that the location where the ground wire 9 is wound around the high frequency noise suppression core 8 in the conventional structure shown in FIG. Moreover, it can be considered that these are integrally fixed to the chassis 7 and only the grounding wire 9 is led out of the apparatus.

Therefore, according to the mounting structure of the present invention, the effect of suppressing high frequency noise is the same as the conventional one, and the high frequency noise is radiated from the external grounding wire 9b not only inside the apparatus but also outside the apparatus. It can be suppressed below a specified level.

In addition, in the present invention, the exposed portion is only the external grounding wire 9b and its connecting portion when viewed from the outside of the device, so that a neat appearance can be maintained. Moreover, in the present invention, since the core accommodating member 81 is firmly fixed inside the device while maintaining insulation from the chassis, the external core portion prevents the device from operating as in the conventional structure (see FIG. 4). The inconvenience of becoming

According to the above-described embodiment, the structure of the attachment member 82 for attaching the core housing member 81 to the chassis 7 is such that it is fitted into the opening formed in the chassis 7 with one touch. It goes without saying that the seed mounting structure can be realized in various other forms.

[0022]

[Effect of the device]

 As described above, according to the mounting structure of the high frequency noise suppressing core of the present invention, the high frequency noise suppressing core portion, in which the internal grounding wire is wound a predetermined number of times, is fixed to the chassis from inside the device, Since the structure is such that only the external grounding wire connected to the internal grounding wire is led out to the outside of the device, not only can the appearance of the device be kept clean, with regard to the function of suppressing the emission of high-frequency noise from the grounding wire part. By fixing the core part to the inside of the device, the obstruction factor of the device operation can be eliminated.

[Brief description of drawings]

FIG. 1 is a view showing an example of a housing structure of a high frequency noise suppressing core according to the present invention.

FIG. 2 is a sectional view of a main part of a chassis showing an example of a mounting structure of a high frequency noise suppressing core according to the present invention.

FIG. 3 is a circuit diagram showing an example of an apparatus having a high frequency noise suppression function.

FIG. 4 is a cross-sectional view of a main part of a chassis showing an example of a conventional high-frequency noise suppression core mounting structure of this type.

[Explanation of symbols]

 1 AC Plug 2 Power Switch 3 AC Line Filter 4a, 4b, 4c Functional Circuit 5 Digital Circuit 6 Capacitor 7 Chassis 8 High Frequency Noise Suppression Core 81 Core Housing Member 82 Mounting Member 83 Internal Conductor 84 External Connection Terminal 9 Grounding Wire 9a Internal grounding wire 9b External grounding wire 91 Chassis connection terminal 92, 10 Connection screw

Claims (3)

[Scope of utility model registration request] 1. A high-frequency noise suppressing core is housed in at least a core housing member having a coating portion for the core, and a mounting member, an external connection terminal, and an external connection terminal for the corresponding part are housed in the core housing member. After providing an electric wire for internal grounding extended by a predetermined length from the core accommodating member to the chassis of the device by the mounting member so that only the external connection terminal protrudes outside the device, The internal grounding electric wire is wound around the core covering portion of the core housing member a predetermined number of times and then connected to the chassis,
An attachment structure for a high-frequency noise suppression core, characterized in that an external grounding wire is connected to the external connection terminal from outside the device. 2. The mounting structure for a core for suppressing high frequency noise according to claim 1, wherein the mounting member is formed of an insulating member that can be fitted into an opening formed in the chassis. 3. The high frequency noise according to claim 1, wherein the internal grounding electric wire has at least a length corresponding to the number of windings of the core covering portion sufficient to suppress the high frequency noise below a specified level. Suppression core mounting structure.