JP2000004085A - Enclosure for electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an enclosure for an electronic apparatus which satisfactorily removes the effects of interfering radio waves and in which cables are easily handled. SOLUTION: This enclosure for the electronic apparatus comprises a case 1 for housing the electronic apparatus therein, a cable lead-in opening 6 formed in one side of the case 1, a cable holding plate 7 placed in proximity to the opening, and a cable fixture 8 which secures an interface cable 4 connecting the electronic apparatus and external equipment on the cable holding plate. Furthermore, the fixture 8 is provided with shielding hardware, which shields the interface cable and cable hardware which holds a ferrite core and secures the interface cable on the ferrite core in contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for electronic equipment, and more particularly to a housing for electronic equipment in which the influence of radioactive interference radio waves from high-frequency components generated from electronic equipment housed in the housing is eliminated. It relates to a housing.

[0002]

2. Description of the Related Art In recent years, as electronic devices have been required to have higher densities and larger capacities, ICs, LSIs, or high-frequency oscillators have been increasingly used in the devices. The generated high-frequency component becomes a radioactive interference radio wave, causing a problem that another digital application device installed near the electronic device malfunctions.

As means for suppressing the radiated interference radio waves generated by the electronic device, an electric field component of the interference radio wave is attenuated by grounding an interface cable connecting the electronic devices via a housing for housing the electronic device. In general, a method of attaching a ferrite core to an interface cable to attenuate a magnetic field component of an obstacle radio wave is used.

[0004]

A conventional apparatus using such a method is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-183686.
There is an apparatus described in Japanese Unexamined Patent Application Publication No. H10-26095. This device comprises a case which is a conductive support provided with a cutout through which a cable passes, and a ferrite core which surrounds the cable inside the case. In addition to the cable outlet, the sheath portion of the cable is removed at a portion corresponding to the cable outlet of the electronic device main body, and this portion is brought into contact with the device main body to ground the cable.

However, in such a conventional apparatus, the cable outlet must be smaller than the size of the cable sheath in order for the cable and the electronic device body to be in close contact with each other and to be reliably grounded. It is difficult to attach a cable to the cable. In addition, since the case for attaching the ferrite core to the cable is cantilevered with respect to the electronic device main body, there is also a problem that noise removal varies. Furthermore, since the case is attached to each individual interface cable and a ferrite core is attached, the manufacturing cost is increased, and if the cable needs to be replaced due to breakage, etc. The cost for replacement is also high.

In a conventional device in which a ferrite core is used to suppress the influence of radiated radio waves, a ferrite core is generally mounted near a connector between an interface cable and a main unit, and the cable is connected to the interface cable. It is difficult to handle during forming. In addition, since the ferrite core is not attached to a fixed position of the cable, the test result may vary when an environmental evaluation test is performed on the electronic device. In addition, since a ferrite core is provided near the cable connector and the cable itself is not fixed at all, stress is applied to the cable by the weight of the ferrite core, which may damage the cable or reduce the reliability of signal transmission. There are also problems.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it has been proposed to remove the influence of interference radio waves satisfactorily.
An object of the present invention is to provide a housing for electronic equipment that can easily handle cables and can be provided at low cost.

[0008]

In order to solve the above-mentioned problems, a housing for an electronic device according to the present invention includes a housing for housing an electronic device therein, and a cable guide provided on one side of the housing. An opening, a cable holding plate provided in the vicinity of the opening, and a cable fixing device for fixing a cable connecting the electronic device and an external device to the cable holding plate, wherein the cable fixing device includes a cable sheath. A shield fitting for shielding the cable by contacting the cable with the cable removed, and a ferrite core holding portion for holding a ferrite core, and a cable fitting for holding the cable in contact with the ferrite core. It is characterized by comprising.

As described above, the housing for an electronic device according to the present invention comprises:
A cable holding plate is provided near an opening for introducing a cable in the housing, and a cable for connecting an electronic device housed in the housing to an external device is fixed on the plate with a cable fixing device. A shield metal fitting that shields the cable, and a ferrite core holding part that holds the ferrite core, grounding the cable via the shield metal fitting to attenuate the electric field component of the radio wave, and the magnetic effect of the ferrite core. The magnetic field component of the obstacle radio wave is attenuated by using the above.

In this case, since the cable is shielded by using the shield metal, it is possible to reliably shield the cable, and it is not necessary to force the cable into close contact with the thin cable outlet. Easy.

In the electronic device housing according to the present invention, the cable extends along one side surface of the cable holding plate and is fixed. In this manner, by extending the cable on the side surface of the cable holding plate and fixing it, the stability of holding the cable is increased, so that there is no variation in the effect of suppressing the radio interference.

Further, in the electronic device housing according to the present invention, the shield fitting includes a cable contact surface that contacts the cable, and the cable fitting further includes a shield holder facing the cable contact surface of the shield fitting. It is characterized by comprising a member. In this way, by holding and holding the cable between the shield fitting and the holding member,
Cables can be shielded more reliably.

Further, in the electronic device housing of the present invention, the cable holding surface of the cable holding plate extends between the electronic device housed inside the housing and the opening. And With this configuration,
The cable can be held in a stretched state, and unnecessary stress on the cable due to the weight of the ferrite core or the like can be prevented.

Further, in the electronic device housing of the present invention,
The invention is characterized in that a shield fitting constituting the cable fixture and a ferrite core held by the cable fitting are configured to be able to hold a plurality of cables collectively. That is, if a required number of cables can be collectively held in the electronic device housed in the housing, it is not necessary to attach a ferrite core to each cable, so that the manufacturing cost can be reduced. Further, when the cable needs to be replaced, only the cable needs to be replaced, so that the cost related to the cable replacement can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an electronic device housing according to the present invention and the internal configuration thereof. The electronic device housing 1 houses an electronic circuit assembly 3 including a plurality of printed circuits 2 therein, and each printed circuit 2 is connected to an interface cable 4.
Through an external device (not shown). An opening 6 is provided in the housing bottom 5.
The interface cable 4 is introduced from outside through the interface.

An interface plate 7 provided integrally with the housing 1 is provided in the vicinity of the opening 6 provided on the bottom 5 of the housing 1 so as to protrude inside the housing 1. The interface cable 4 is held on the side wall of the cable 7 by using a cable fixture 8.

FIGS. 2, 3 and 4 are views showing a detailed structure of the cable fixing device 8, and FIG.
FIG. 3 is a plan view seen from the direction of arrow A in FIG. 2, and FIG.
3 is a side sectional view taken along line BB of FIG.

As shown in these figures, the cable fixture 8 is composed of a shield 10 and a cable 11 that presses and holds the interface cable 4 against the shield 10. Shield fitting 10
Has a width capable of holding the external interface cables 4 used in the electronic circuit assembly 3 housed in the housing 1 in a line, and is fixed with the back surface in close contact with the side surface of the interface plate 7. As shown in FIG. 4, it has a shape having a step when viewed from the side.

On the other hand, the cable fitting 11, like the shield fitting 10, has a width capable of holding the external interface cables 4 used in the electronic circuit assembly 3 in a line, and has a ferrite core 13 inside. , 14 are formed. The cable fitting 11 is, as shown in FIG.
It is screwed to the interface plate 7 on both sides.

As shown in FIG. 3 and FIG. 4, two ferrite cores 1
3 and 14 are stored facing each other. The ferrite cores 13 and 14 have notches 13a and 14a respectively corresponding to the outer diameter of the interface cable 4, and have a U-shaped cross section. These notches 13a and 14a
The interface cable 4 is interposed and held therebetween.

As shown in FIG. 4, the cable fitting 11 is
A shield presser 1 is provided at a position facing the shield fitting 10.
6, and the interface cable 4 is held between the shield fitting 10 and the shield retainer 16.
Note that, as shown in FIG.
In the portion of the device, the sheath portion 4a is removed at a portion sandwiched between the shield fitting 10 and the shield retainer 16.

The interface cable 4 is fixed to the interface plate 7 using the cable fixing device 8 configured as described above. The interface cable 4 is connected to the ferrite core holding portion 15 of the cable fitting 10.
Are held in close contact with the ferrite cores 13 and 14, and the magnetic effect of the ferrite core attenuates the magnetic field component of the interference radio wave. On the other hand, the portion of the interface cable 4 from which the sheath 4a has been removed is held by the shield fitting 10 and the shield pressing portion 16, so that the ground of the cable 4 is realized to attenuate the electric field component of the trouble radio wave.

As described above, the plate 7 is provided in the vicinity of the opening 5 of the housing 1, and the cable fixing device 8 having the above-described structure is provided.
By fixing the interface cable 4 to the side surface of the plate 7 using, the influence of the obstructive electric wave can be suitably suppressed. In particular, since the cable 4 is sandwiched between the shield fitting 10 and the shield retainer 16 of the cable fitting 11, a shielding effect can be reliably obtained. Further, since the interface cable 4 is attached while being extended on the plate 7, it is possible to prevent the cable from being damaged without applying excessive stress to a specific portion. Also, since the interface cables 4 used for the electronic devices housed in the housing 1 are fixed together by one cable fixing device 8,
Manufacturing costs can be reduced. When the cable is replaced, the metal fittings 10 and 11 and the ferrite core 1 are also used.
Since only the damaged cable can be replaced while the cables 3 and 14 are kept as they are, the cost for replacement can be reduced.

[0024]

As described above, according to the present invention, the effect of suppressing interference radio waves can be made more reliable and stable, and the cost for attaching and replacing cables can be reduced. Further, the handling of the cable becomes easy, and no extra stress is applied to the cable, so that the damage to the cable can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an electronic apparatus housing according to the present invention and the internal configuration thereof.

FIG. 2 is a front view showing a detailed configuration of a cable fixing device.

FIG. 3 is a plan view of the cable fixing tool shown in FIG.

FIG. 4 is a side sectional view taken along line BB of the cable fixing device shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Printed circuit 3 Electronic circuit assembly 4 Interface cable 4a Cable sheath 5 Bottom plate 6 Interface cable intake opening 7 Interface cable holding plate 8 Cable fixing tool 10 Shield fitting 11 Cable fitting 13, 14 Ferrite core 15 Ferrite core Holder 16 Shield presser

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[Procedure amendment]

[Submission date] March 30, 1999 (1999.3.3)
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

As shown in these figures, the cable fixing device 8 is composed of a shield metal member 10 and a cable metal member 11 for pressing and holding the interface cable 4 against the shield metal member 10. Shield fitting 10
Has a width capable of holding the external interface cables 4 used in the electronic circuit assembly 3 housed in the housing 1 in a line, and is fixed with the back surface in close contact with the side surface of the interface plate 7. ing. Also,
As shown in FIG. 4, the shield fitting 10 is stepped when viewed from the side.
The free end of the
The shield contact surface 10a that contacts the base cable 4
Has formed.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

As shown in FIG. 4, the cable fitting 11 is
Corresponding to the shield contact surface 10a of the shield fitting 10 .
At a position opposite to the shield contact surface 10a, a shield presser 16 is provided. The shield presser 16 is provided between the shield contact surface 10a and the shield presser 16.
Is sandwiched. As shown in FIG. 4, the sheath portion 4 a of the interface cable 4 is removed at a portion sandwiched between the shield fitting 10 and the shield retainer 16.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

The interface cable 4 is fixed to the interface plate 7 using the cable fixing device 8 configured as described above. The interface cable 4 is connected to the ferrite core holding portion 15 of the cable fitting 10.
Are held in close contact with the ferrite cores 13 and 14, and the magnetic effect of the ferrite core attenuates the magnetic field component of the interference radio wave. On the other hand, the portion of the interface cable 4 from which the sheath 4a has been removed is sealed.
The cable 4 is held by the contact surface 10a and the shield pressing portion 16 to realize the ground of the cable 4 to attenuate the electric field component of the obstructing radio wave.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

As described above, the plate 7 is provided in the vicinity of the opening 5 of the housing 1, and the cable fixing device 8 having the above-described structure is provided.
By fixing the interface cable 4 to the side surface of the plate 7 using, the influence of the obstructive electric wave can be suitably suppressed. In particular, since the cable 4 is sandwiched between two surfaces of the shield contact surface 10a of the shield fitting 10 and the shield presser 16 of the cable fitting 11, a shielding effect can be reliably obtained. Further, since the interface cable 4 is attached while being extended on the plate 7, it is possible to prevent the cable from being damaged without applying excessive stress to a specific portion. In addition, since the interface cables 4 used for the electronic devices housed in the housing 1 are collectively fixed by the single cable fixing device 8, the manufacturing cost can be reduced. Also, when replacing the cable, the metal fittings 10, 11 and the ferrite cores 13, 14 can be left as they are, and only the damaged cable can be replaced, so that the cost for replacement can be reduced.

[Procedure amendment 6]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (6)

[Claims] 1. A housing for housing an electronic device therein, a cable introduction opening provided on one side of the housing, a cable holding plate provided near the opening, the electronic device and an external device. A cable fixing tool for fixing a cable connecting the cable to the cable holding plate, the cable fixing tool making contact with the cable in a state where a cable sheath is removed to shield the cable, and a ferrite core. And a cable fitting for holding the cable in contact with the ferrite core and holding the cable in contact with the ferrite core. 2. The electronic device housing according to claim 1, wherein the cable extends along one side surface of the cable holding plate and is fixed. 3. The electronic device casing according to claim 1, wherein the shield has a cable contact surface that contacts the cable, and the cable further has a cable contact surface of the shield. A housing for an electronic device, comprising a shield pressing member facing the electronic device. 4. The electronic device housing according to claim 1, wherein said opening is provided at a bottom portion of said housing. 5. The electronic device housing according to claim 1, wherein a cable holding surface of the cable holding plate is formed between the electronic device housed inside the housing and the opening. A housing for an electronic device, extending between the housings. 6. The electronic device casing according to claim 1, wherein the shield metal constituting the cable fixing member and the ferrite core held by the cable metal member form a plurality of cables. An electronic device housing configured to be held together.