JPH11299057A - Mounting structure of shielded wire to metal case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a shielded wire that prevents noise from leaking to the outside and has waterproofness to a metal case. SOLUTION: When a shielded wire 2 where a conductive shield material 23 is sandwiched between a metal piece 24 and an elastic piece 22 is inserted into a shielded wire insertion hole 29 of a metal case 19, the metal piece 24 makes contact with the metal case 19 at a recess 27 of the metal case 19 so that the metal piece 24, the metal case 19, and the conductive shield material 23 makes contact with each another. In this state, by screwing a screw part 21a of a locking tool 21 to a shielded wire insertion hole 29 of the metal case 19 from the outside via a metal piece 24', the elastic piece 22 is fixed into the metal case 19, thus pressing the elastic piece 22 via the metal piece 24' and pressing the conductive shield material 23 and the metal piece 24 to the inside of the metal case 19, and bringing the conductive shield wire 23 and the metal case 19 into contact which each other via the metal piece 24 for conducting electricity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a shielded wire to a metal case.

[0002]

2. Description of the Related Art Conventionally, when a shield wire is attached to a case, a packing 47 is disposed between an upper box 42 and a lower box 44 of a conductive cover 41 as shown in FIG. The shield wire 49 is inserted into the conductive cover 41 so that the shield wire 49 is in contact with the inside of the conductive cover 41, and the shield wire 49 is grounded. At the same time, the packing 47 and the shield wire 49 are brought into close contact with each other to ensure the waterproofness of the conductive cover 41 (Japanese Patent Laid-Open No. 7-1995).
No. 211395).

[0003]

However, according to the prior art, the electric wire insertion notches 43, 45 of the conductive cover 41 are not provided.
There is a drawback that the noise in the conductive cover 41 leaks outside through the packing 47 and the insulating portion of the outer skin of the shield wire 49 since the space between the shield wire 49 and the shield wire 49 is not electrically shielded.

An object of the present invention is to solve the above-mentioned problems, and to ensure the electrical connection between a first conductive shield material of a shield wire and a metal case so that noise does not leak outside. Another object of the present invention is to provide a structure for attaching a shielded wire having a waterproof property to a metal case.

[0005]

According to a first aspect of the present invention, there is provided an electro-optical device comprising: a conductor having one or a plurality of cores covered with an insulator; In a structure for attaching a shielded wire to a metal case, the shielded wire is attached to a metal case, the shielded wire being covered with a material, and the outside of the first conductive shield material is covered with an insulator. An elastic piece that is in contact with the shield wire, and a first stopper that fixes the elastic piece to the metal case; a core wire of the shield wire is inserted into the metal case; The first conductive shield material and the metal case can be reliably grounded at the same potential by bringing the conductive shield material into contact with the metal case. Gold from around Generated in the outside of the case it can reduce the unnecessary radiation noise.

According to a second aspect of the present invention, in the first aspect of the invention, the metal piece is disposed between the metal case and the first conductive shield material, so that the conductive shield material and the metal case are arranged. And grounding between the shield case and the metal case can be reduced.

According to a third aspect of the present invention, in the first aspect of the invention, the metal piece is disposed between the first conductive shield material and the elastic piece, so that the conductive shield material and the metal case are provided. And grounding between the shield case and the metal case can be reduced.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a second stopper is provided for contacting the first conductive shield member or the metal piece and fixing them to the metal case. Thereby, grounding between the conductive shield material and the metal case is strengthened, and unnecessary radiation noise generated outside the metal case can be reduced.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the metal piece is disposed between the metal case and the first conductive shield material, so that the conductive shield material and the metal case are separated. The ground between them is strengthened, and unnecessary radiation noise generated outside the metal case can be reduced.

According to a sixth aspect of the present invention, in the fourth or fifth aspect of the present invention, the metal piece is disposed between the second stopper and the first conductive shield material, thereby providing a conductive shield. Grounding between the material and the metal case is strengthened, and unnecessary radiation noise generated outside the metal case can be reduced.

According to a seventh aspect of the present invention, in any one of the fourth to sixth aspects, the second stopper is disposed on the same side as the first stopper with respect to one surface of the metal case. Thereby, the operability when fixing the second stopper can be improved.

According to an eighth aspect of the present invention, in any one of the fourth to seventh aspects of the present invention, the second stopper is disposed on a side of the metal case opposite to the first stopper. This improves the adhesion between the elastic piece and the metal case,
Water resistance can be improved.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects of the present invention, the shield wire is provided between the core wire and the first conductive shield material from the center to the outside. By comprising the coaxial wire covered with the second conductive shield material and the second insulator, it is possible to prevent unnecessary radiation noise generated from the core wire and the second conductive shield material from leaking outside the shield wire. Can be.

According to a tenth aspect of the present invention, in the first aspect of the present invention, the first conductive shield material is made of a braided conductor, so that unnecessary radiation noise leaks to the outside of the shield wire. can do.

According to an eleventh aspect of the present invention, in the invention of any one of the first to ninth aspects, since the first conductive shield material is made of a metal foil, leakage of unnecessary radiation noise to the outside of the shield wire is reduced. can do.

According to a twelfth aspect of the present invention, in any one of the first to eleventh aspects, the first insulator is made of vinyl chloride, so that the inside of the metal case has waterproofness to the outside. Can have.

According to a thirteenth aspect of the present invention, in any one of the first to twelfth aspects of the invention, the elastic piece is made of silicon rubber, so that the shield wire can be waterproofed at a portion where the shield wire is attached to the metal case.

According to a fourteenth aspect of the present invention, in any one of the first to thirteenth aspects, airtightness is provided between the elastic piece and the first insulator of the metal case and the shielded wire. Thereby, waterproofing can be achieved at a portion where the shielded wire is attached to the metal case.

According to a fifteenth aspect of the present invention, the conductor has one or more core wires covered with an insulator, and the core wires are covered with a first conductive shield material. In a structure for attaching a shielded wire to a metal case, wherein the shielded wire is attached to a metal case, the shielded wire is made of an annular metal washer, at least the core wire penetrates, and the metal case and the first conductive shield material One or more metal pieces disposed therebetween, an elastic piece through which the shield wire penetrates and makes contact, and a first stopper for fixing the elastic piece to the metal case, wherein the shield wire Is between the core wire and the first conductive shield material,
A coaxial wire covered with a second conductive shield material and a second insulator from the center side to the outside, and the first conductive shield material is made of a braided conductor, and the core wire of the shield wire is While being inserted into the metal case, the metal piece and the first conductive shield material are brought into contact with and conductive to the metal case, so that the elastic piece and the first insulator of the metal case and the shield wire are connected. By providing airtightness, grounding between the conductive shield material and the metal case is ensured, unnecessary radiation noise generated outside the metal case from around the shield wire and the metal case mounting part is reduced, and the shield By using a coaxial cable, unnecessary high-frequency radiation noise can be reduced, and waterproofing can be achieved at a portion where the shielded cable is attached to the metal case.

[0020]

(Embodiment 1) Embodiment 1 of the present invention will be described in detail with reference to FIGS.

In this embodiment, as shown in FIG. 1, a metal case 19 is provided with a shield wire insertion hole 29 through which the shield wire 2 is inserted.
A recess 27 with which the wire 4 contacts is protruded from the inside of the metal case 19, and the recess 27 is provided with a core wire insertion hole 26 for inserting the core wire 28 of the shield wire 2. Now, when the shield wire 2 having the conductive shield material 23 sandwiched between the metal piece 24 and the elastic piece 22 is inserted into the shield wire insertion hole 29 of the metal case 19, the core wire 28 of the shield wire becomes the concave portion 27.
The metal piece 24 and the metal case 19 are in contact with each other in the concave portion 27, and the metal piece 24, the metal case 19, and the conductive shield material 23 are in contact with each other. In this state, the elastic piece 22 is fixed to the metal case 19 by the stopper 21.
The stopper 21 is provided with a screw portion 21a. The screw portion 21a is externally screwed into the shield wire insertion hole 29 of the metal case 19 via the metal piece 24 ', so that the elastic piece 22 is inserted into the metal case 19. Fix it.

Incidentally, the shield wire 2 penetrates the stopper 21, and the shield wire 2 is fixed to the metal case 19 when the stopper 21 is inserted into the shield wire insertion hole 29. As a result, the elastic piece 22 is pressed through the metal piece 24 ′, and the conductive shield material 23 and the metal piece 2 are pressed.
4 is pressed inside the metal case 19, and the conductive shielding material 23 and the metal case 19 are brought into contact with each other via the metal piece 24 to make contact. As a result, the shield wire 2 and the metal case 19
Unnecessary radiation noise emitted from the periphery of the mounting portion to the outside of the metal case 19 is considerably reduced. In particular, when transmitting a high-frequency voltage through the shield wire 2, unnecessary high-frequency radiation noise can be significantly reduced. Further, when the elastic piece 22 is deformed by pressurization, the inner and outer side surfaces of the elastic piece 22 come into contact with the insulator of the shielded wire 2 and the metal case 19 to maintain airtightness. The structure is waterproof.

In the first embodiment, the metal piece 24
May be provided with a hatched groove on the surface like the metal piece 41 in FIG. 2 or may be roughened like the metal piece 40 in FIG. There is an effect that the ground between them is strengthened. Further, a configuration in which the conductive piece 23 is directly in contact with the metal case 19 without the metal piece 24 may be used. Further, the elastic piece 22 used in the first embodiment is made of silicon rubber, and the shield wire 2 is, as shown in FIG.
Toward the inner conductor 100 which is the core wire,
The one covered with the insulator 101, the outer conductor 102, the insulator 103, the conductive shield material 104, and the insulator 105 is used. Further, the shielded wire 2 may be a shielded multi-core wire, and the insulator outside the shielded wire 2 is made of vinyl chloride. The same effect can be obtained by using any of the horizontal winding 2a shown in FIG. 4, the braided wire 2b shown in FIG. 5, and the metal foil structure 2c shown in FIG.

The present invention is used, for example, in the electrodeless discharge lamp lighting device shown in FIG. The electrodeless discharge lamp lighting device
Commercial power supply 30, 2-core shielded wire 25, metal case 34,
Coaxial line 2, metal case 37, high frequency power supply coil 3
8. It is composed of an electrodeless discharge lamp 39. In one metal case 34, a diode bridge 31, a chopper power supply circuit 32, and a high-frequency amplifier circuit 33 are housed, and in the other metal case 37, a matching circuit 36 is housed. Here, the metal case 34, the two-core shielded wire 25, and the coaxial wire 2
Have the same potential, and the metal case 37 and the conductive shield material of the coaxial line 2 have the same potential.

When the coaxial cable 2 is mounted on the metal cases 34 and 37, the above-described mounting structure is used.
An electrodeless discharge lamp having a low-noise and waterproof structure that can suppress unnecessary high-frequency radiated noise generated from the metal case 37, the coaxial line 2, and the like of the electrodeless discharge lamp lighting device that operates at a high frequency of several hundred kHz or more. A lighting device can be configured. Also,
INDUSTRIAL APPLICABILITY The present invention is not limited to an electrodeless discharge lamp lighting device, and can be used anywhere when an electric circuit or the like provided in a metal case is electrically connected.

(Embodiment 2) In Embodiment 2, as shown in FIG. 9, a concave portion 27 is provided on the side surface of a metal case 19, and the shape of the elastic piece 22 fits into the concave portion 27 of the metal case 19. It is convex. Here, the first embodiment
Similarly, the shield wire 2 having the conductive shield material 23 sandwiched between the metal piece 24 and the elastic piece 22 is connected to the metal case 19.
And the core wire 28 of the shield wire 2 is projected from the core wire insertion hole 26 to the inside of the metal case 19. Further, by fitting the convex portion 22a of the elastic piece 22 formed in a convex shape into the concave portion 27 of the metal case 19, the metal piece 24 is formed.
And the conductive shielding material 23 and the metal case 19 are brought into contact with each other. In this state, the shield wire 2 is
The elastic piece 22 is externally attached by screws 6 and 7 through which the stopper 21 penetrated and the stopper 21 and the elastic piece 22 penetrated.
Is pressed and fixed to the metal case 19. As a result, the metal case 19 and the conductive shielding material 23
Is made conductive.

In the second embodiment, since the elastic piece 22 is pressed against the metal case 19 from the outside by the screws 6 and 7 via the stopper 21, the metal case 19, the metal piece 24, and the conductive shield are particularly provided. Since the members 23 are in close contact with each other, the mutual adhesion is improved as compared with the first embodiment, and unnecessary radiation noise is hardly emitted to the outside of the metal case 19 and at the same time, The waterproof property is maintained.

(Embodiment 3) In Embodiment 3, as shown in FIG. 10, a conductive shield material 23 is sandwiched between metal pieces 24 and 24 'inside a metal case 19, and
A stopper 21 ′ is arranged on the inside so as to press the metal pieces 24, 24 ′ and the conductive shield material 23, and the stopper 21 ′
Are fixed to the metal case 19 by screws 17 and 18 penetrating both ends of the metal case 19. At this time, the core wire 28 of the shield wire 2 projects inside the metal case 19 via the stopper 21 '. Further, the elastic piece 22 is formed in a convex shape as in the second embodiment, and when the elastic piece 22 is fixed to the metal case 19, the metal case 1
The projection 22a of the elastic piece 22 is fitted into the recess 27 of the ninth 9, and the elastic piece 22 is fixed to the metal case 19 by penetrating both ends of the stopper 21 and the metal case 19 by screws 11, 12 via the stopper 21. . Thereby, the metal pieces 24, 24 '
The conductive shield material 23 contacts the metal case 19 inside the metal case 19 by the stopper 21 ′, and the conductive shield material 23 directly contacts the metal case 19 without the intermediary of the elastic piece 22. The conductive shield material 23 and the metal case 19 have the same potential via 24 '.

In the third embodiment, the metal pieces 24 and 24 ′ and the conductive shielding material 23 are directly attached to the metal case 19 inside the metal case 19.
Unlike this, the contact and grounding of the conductive shield material 23 with the metal case 19 are strengthened, and unnecessary radiation noise generated from the metal case 19 and the like is reduced. Further, since the screws 11 and 12 are tightened from outside the metal case 19 via the stopper 21 and the elastic piece 22 is pressed against the metal case 19, the adhesion between the elastic piece 22 and the metal case 19 is improved, and the metal case 19 is improved. The inside waterproofness is maintained.

(Embodiment 4) In Embodiment 4, FIG.
As shown in FIG. 5, a concave portion 27 is provided on the side surface of the metal case 19, and the elastic piece 22 is formed in a convex shape that fits into the concave portion 27. A recess 22b is provided. Now, metal piece 2
When the core wire 28 is inserted through the core wire insertion hole 26 provided in the metal case 19 in a state in which the metal piece 24 is in contact with the conductive shield material 23, the metal piece 24 comes into contact with the metal case 19 at the concave portion 27 of the metal case 19. , Metal piece 24 and metal case 19
And the conductive shield members 23 are in contact with each other. In this state, the conductive shield material 23 and the metal piece 24 are pressed against the metal case 19 by the stopper 21 ′ through which the core wire 28 has penetrated, and both ends of the stopper 21 ′ are penetrated by screws 51 and 52, and fixed to the metal case 19. . Thereby, the metal piece 24
The conductive shield material 23 is electrically connected to the metal case 19 via the. Then, the convex portion 22a of the elastic piece 22 is
9, the stopper 21 is mounted on the outer surface of the elastic piece 22, and the elastic piece 22 is fixed to the metal case 19 by screws 6, 7 penetrating the elastic piece 22. At this time, since the concave portion 22b is provided in the convex portion 22a of the elastic piece 22, the elastic piece 22 does not contact the stopper 21 'and the screws 51 and 52. For this reason,
The conductive shield material 23 is strongly pressed against the metal case 19 via the metal piece 4 by the stopper 21 ′, so that contact conduction to the metal case 19 and grounding are enhanced. As a result, unnecessary radiation noise generated from a metal case or the like is further reduced as compared with the second embodiment. Further, compared to the third embodiment, since the stopper 21 'is fixed from the outside of the case, the operability at the time of assembly is improved.

[0031]

According to the first aspect of the present invention, the conductor has one or more core wires covered with an insulator, and the core wire is covered with a first conductive shield material, and the first conductive shield material is covered with the first conductive shield material. In a structure for attaching a shield wire to a metal case, wherein the shield wire is attached to a metal case, the shield wire having the core wire penetrating therethrough, and the shield wire penetrating and contacting the metal wire. An elastic piece, and a first stopper that fixes the elastic piece to the metal case, and a core wire of the shield wire is inserted through the metal case, and the metal piece and the elastic piece, By fixing the first conductor shield material to the metal case and making contact with the metal piece and the elastic piece, the grounding between the conductive shield material and the metal case is ensured, and the connection between the shield wire and the metal case is performed. Outside the metal case from around There is an effect that unnecessary radiation noise is reduced that occurs.

According to a second aspect of the present invention, since the metal piece is disposed between the metal case and the first conductive shield material, grounding between the conductive shield material and the metal case is ensured. Thus, there is an effect that unnecessary radiation noise generated outside the metal case from around the connection between the shield wire and the metal case is reduced.

According to a third aspect of the present invention, the metal piece is disposed between the first conductive shield material and the elastic piece, so that the grounding between the conductive shield material and the metal case is ensured. Thus, there is an effect that unnecessary radiation noise generated outside the metal case from around the connection between the shield wire and the metal case is reduced.

According to a fourth aspect of the present invention, there is provided a conductive shield material comprising a second stopper which comes into contact with the first conductive shield material or the metal piece and fixes them to the metal case. There is an effect that grounding between the metal case and the metal case is strengthened, and unnecessary radiation noise generated outside the metal case is reduced.

According to a fifth aspect of the present invention, the metal piece is arranged between the metal case and the conductive shield material, whereby the grounding between the conductive shield material and the metal case is strengthened. There is an effect that unnecessary radiation noise generated outside is reduced.

According to a sixth aspect of the present invention, the metal piece is attached to the second
The arrangement between the stopper and the first conductive shield member enhances the grounding between the conductive shield member and the metal case, and reduces unnecessary radiation noise generated outside the metal case. effective.

According to a seventh aspect of the present invention, the second stopper is
By arranging it on the same side as the first stopper with respect to one surface of the metal case, there is an effect that the operability when fixing the second stopper is good.

According to an eighth aspect of the present invention, the second stopper is
By arranging it on the side opposite to the first stopper with respect to one surface of the metal case, there is an effect that the adhesion between the elastic piece and the metal case is improved and the waterproof property is enhanced.

According to a ninth aspect of the present invention, the shield wire is provided between the core wire and the first conductive shield material from the center side to the outside from the second conductive shield material and the second insulating material. By being covered with the body, there is an effect that unnecessary radiation noise generated from the core wire and the second conductive shield material is not easily emitted to the outside of the shield wire.

According to the tenth aspect of the present invention, since the first conductive shield member is made of a braided conductor, there is an effect that unnecessary radiation noise is less leaked to the outside of the shield wire.

According to the eleventh aspect of the present invention, since the first conductive shielding material is made of a metal foil, there is an effect that unnecessary radiation noise is less leaked to the outside of the shielded wire.

According to the twelfth aspect of the present invention, since the material of the first insulator is made of vinyl chloride (PVC), the inside of the metal case has an effect of being waterproof to the outside.

According to the thirteenth aspect of the present invention, since the elastic piece is made of silicone rubber, there is an effect that the inside of the metal case has waterproofness to the outside.

According to a fourteenth aspect of the present invention, since the elastic piece and the first insulator of the metal case and the shield wire have airtightness, the inside of the metal case is waterproof to the outside. This has the effect of having

According to a fifteenth aspect of the present invention, the conductor has one or more core wires covered with an insulator, and the core wires are covered with a first conductive shield material. In a structure for attaching a shielded wire to a metal case, which attaches a shielded wire whose outside is covered with an insulator to a metal case, by contacting the metal case, the metal piece and the first conductive shield material, It becomes the same potential, the metal piece is disposed between the metal case and the first conductive shield material, and the shield wire is a coaxial line in which one core wire is disposed at the center, The coaxial line is configured such that a second conductive shield material and a second insulator are respectively covered from a center side between the core wire and the first conductive shield material, and Or a plurality of second conductive shielding materials The metal pieces are annular metal washers, and hermetically sealed between the elastic pieces and the first insulator of the metal case and the shielded wire. By having the property
Grounding between the conductive shield material and the metal case is assured, unnecessary radiation noise generated outside the metal case from around the connection between the shield wire and the metal case is reduced, and unnecessary radiation noise of high frequency is reduced by the coaxial line. Koyu e4e4c6 is made,
There is an effect that the inside of the metal case has waterproofness to the outside.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a perspective view of another metal piece of the above.

FIG. 3 is a perspective view of another metal piece in the above.

FIG. 4 is an external view of another shield line in the above.

FIG. 5 is an external view of another shield line in the above.

FIG. 6 is an external view of another shielded wire of the above.

FIG. 7 is a configuration diagram of a shield line.

FIG. 8 is a block diagram of an electrodeless discharge lamp lighting device using the above.

FIG. 9 is a cross-sectional view of the second embodiment.

FIG. 10 is a sectional view of a third embodiment.

FIG. 11 is a sectional view of a fourth embodiment.

FIG. 12 is a sectional view of a conventional example.

[Explanation of symbols]

 2 Shield wire 19 Metal case 21 Stopper 22 Elastic piece 23 Conductive shield material 24 Metal piece 27 Concave part

Claims (15)

[Claims] 1. A conductor having one or more core wires covered with an insulator, wherein the core wires are covered with a first conductive shield material,
In a structure for attaching a shielded wire to a metal case, the shielded wire having an outer surface covered with an insulator and covered with an insulating material, wherein the core piece penetrates a metal piece and the shielded wire penetrates. And a first stopper for fixing the elastic piece to the metal case, allowing the core wire of the shield wire to pass through the metal case, and connecting the metal piece and the first conductive member. A shielded wire attached to the metal case, wherein a conductive material is brought into contact with the metal case. 2. The structure according to claim 1, wherein said metal piece is disposed between said metal case and said first conductive shield material. 3. The mounting structure according to claim 1, wherein the metal piece is disposed between the first conductive shield material and the elastic piece. 4. The shielded wire according to claim 1, further comprising a second stopper that comes into contact with the first conductive shield material or the metal piece and fixes them to the metal case. Mounting structure to metal case. 5. The method according to claim 5, wherein the metal piece is provided between the metal case and the first case.
The structure for attaching a shielded wire to a metal case according to claim 4, wherein the shielded wire is disposed between the conductive wire and the conductive shield material. 6. The mounting of a shielded wire on a metal case according to claim 4, wherein the metal piece is disposed between the second stopper and the first conductive shield material. Construction. 7. The shield according to claim 4, wherein the second stopper is disposed on the same side of the one surface of the metal case as the first stopper. Structure for attaching wires to metal cases. 8. The shield according to claim 4, wherein the second stopper is disposed on a side of the metal case opposite to the first stopper. Structure for attaching wires to metal cases. 9. The semiconductor device according to claim 9, wherein the shield wire is connected to the core wire and the first wire.
9. A coaxial cable covered with a second conductive shield material and a second insulator from the center side to the outer side between the conductive shield material and the second conductive shield material. Structure for mounting shielded wire described in Crab to metal case. 10. The structure according to claim 1, wherein the first conductive shield material is made of a braided conductor. 11. The mounting structure according to claim 1, wherein the first conductive shield material is made of a metal foil. 12. The structure according to claim 1, wherein the first insulator is made of vinyl chloride. 13. The mounting structure according to claim 1, wherein the elastic piece is made of silicon rubber. 14. The shielded wire according to claim 1, wherein airtightness is provided between the elastic piece and the first insulator of the metal case and the shielded wire. Mounting structure to metal case. 15. A conductor having one or more core wires covered with an insulator, wherein the core wires are covered with a first conductive shield material, and the outside of the first conductive shield material is an insulator. In a structure for attaching a covered shield wire to a metal case, the shield wire is attached to the metal case, and at least the core wire is formed of an annular metal washer and is disposed between the metal case and the first conductive shield material. One or a plurality of metal pieces, an elastic piece through which the shield wire penetrates and contacts, and a first stopper for fixing the elastic piece to the metal case, wherein the shield wire is connected to the core wire. A coaxial line between the first conductive shield material and a second conductive shield material and a second insulator covered from a center side to an outer side, and the first conductive shield The material is made of braided conductor, The core wire of the shield wire is inserted into the metal case, and the metal piece and the first conductive shield material are brought into contact with the metal case so as to be in contact with each other. A structure for attaching a shielded wire to a metal case, wherein the shielded wire has airtightness with an insulator.