JP2015106464A - Shield unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield unit which can improve the assemblability with a simple structure.SOLUTION: A shield unit 1 comprises: a shield shell 5 having a cylindrical part 3; a cylindrical bracket 7 arranged on the inner peripheral side of the cylindrical part 3; a cylindrical shield member 9 arranged between the cylindrical part 3 and the bracket 7. The bracket 7 is provided with a shell fixing part 11 which is arranged in a hook-like shape facing the outer peripheral surface side of the cylindrical part 3, and which fixes the bracket 7 to the shield shell 5 by press-fitting the cylindrical part 3 with the shield member 9 sandwiched between the cylindrical part 3 and the bracket 7.

Description

  The present invention relates to a shield unit applied to a vehicle.

  The shield unit is assembled on the wire lead-out side of the housing, such as a casing that houses equipment mounted on the vehicle, or a connector housing that houses terminals, and covers the outer periphery of the wire, thereby preventing noise from the wire, etc. Prevents intrusion such as noise leakage and noise into the wire.

  Conventionally, as such a shield unit, an outer cylinder member as a shield shell having a cylindrical portion, an inner cylinder member as a cylindrical bracket disposed on the inner peripheral side of the outer cylinder member, and an outer cylinder member, What is provided with the cylindrical shield member arrange | positioned between inner cylinder members is known (for example, refer patent document 1).

  In this shield unit, the inner cylinder member is provided with a positioning claw for positioning the end of the shield member, the shield member is disposed between the outer cylinder member and the inner cylinder member, and the shield member is positioned by the positioning claw.

  Then, by pressing the outer periphery of the outer cylinder member with a pressing die, the outer cylinder member is plastically deformed in the direction of reducing the diameter, the shield member is sandwiched between the outer cylinder member and the inner cylinder member, and the outer cylinder member is It is made to fix to a cylinder member.

JP 2006-260985 A

  However, in the shield unit as in Patent Document 1, the cylindrical portion is reduced in diameter by pressing the outer periphery of the cylindrical portion of the shield shell with a pressing die, so that a large jig such as a pressing die is used. In addition, a process of reducing the diameter of the cylindrical portion is required, and the assembling property is lowered.

  Accordingly, an object of the present invention is to provide a shield unit capable of improving the assembling property with a simple structure.

  The invention according to claim 1 is a shield shell having a tubular portion, a tubular bracket disposed on the inner peripheral side of the tubular portion, and a tube disposed between the tubular portion and the bracket. A shield unit including a shield member, and the bracket is provided in a hook shape toward the outer peripheral surface side of the tubular portion, and the shield member is disposed between the tubular portion and the bracket. A shell fixing portion is provided that press-fits the cylindrical portion and fixes the bracket to the shield shell while being sandwiched between the two.

  In this shield unit, the bracket is provided in a hook shape toward the outer peripheral surface side of the cylindrical portion. With the shield member sandwiched between the cylindrical portion and the bracket, the cylindrical portion is press-fitted into the bracket. Since the shell fixing portion to be fixed to the shield shell is provided, a process of reducing the diameter of the cylindrical portion of the shield shell or caulking another member is not required.

  Therefore, in such a shield unit, since the bracket is fixed to the shield shell by press-fitting the cylindrical portion by the shell fixing portion, the assemblability can be improved with a simple structure.

Invention of Claim 2 is the shield unit of Claim 1, Comprising: The said shell fixing | fixed part press-fits the edge part of the engagement hole part provided in the said cylindrical part, The said shield member is In this shield unit, the shield member is hooked on the shell fixing portion and is hooked on the shell fixing portion, and is prevented from coming off from the cylindrical portion and the bracket. Therefore, it is possible to reliably prevent the shield member from being detached from the shield shell and the bracket by returning the hook-shaped shell fixing portion.

  The invention according to claim 3 is the shield unit according to claim 1, wherein the shield member is provided with a folded portion that is inserted through the inner peripheral side of the bracket and disposed on the outer peripheral side of the bracket. The shell fixing portion presses the end of the cylindrical portion and the end of the folded portion to fix the bracket and the shield member to the shield shell.

  In this shield unit, the shell fixing portion press-fits the end portion of the tubular portion and the end portion of the folded portion to fix the bracket and the shield member to the shield shell, so that the shield member is folded back by the tubular portion and the bracket. In addition to the pinching of the portion, the shield member can be reliably prevented from coming off the shield shell and the bracket by press-fitting the end of the folded portion into the shell fixing portion.

  Invention of Claim 4 is a shield unit of any one of Claim 1 thru | or 3, Comprising: The protrusion for shielding projected to the outward in the said bracket, and this protrusion for shielding A slit that can be bent is provided, and the shield protrusion presses the shield member disposed on the outer peripheral side of the bracket toward the inner peripheral side of the cylindrical portion.

  In this shield unit, since the shield projection presses the shield member disposed on the outer peripheral side of the bracket toward the inner peripheral side of the cylindrical portion, the shield member is always pressed against the cylindrical portion by the shield projection, The fixing of the shield member to the shield shell can be strengthened.

  According to the present invention, there is an effect that it is possible to provide a shield unit capable of improving the assembling property with a simple structure.

It is a perspective view of the shield unit concerning a 1st embodiment of the present invention. It is a disassembled perspective view of the shield unit which concerns on 1st Embodiment of this invention. It is sectional drawing of the shield unit which concerns on 1st Embodiment of this invention. It is a principal part enlarged view of FIG. It is a perspective view of the shield unit concerning a 2nd embodiment of the present invention. It is a disassembled perspective view of the shield unit which concerns on 2nd Embodiment of this invention. It is sectional drawing of the shield unit which concerns on 2nd Embodiment of this invention. It is a principal part enlarged view of FIG.

  A shield unit according to an embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
The first embodiment will be described with reference to FIGS.

  The shield unit 1 according to the present embodiment includes a shield shell 5 having a cylindrical portion 3, a cylindrical bracket 7 disposed on the inner peripheral side of the cylindrical portion 3, and the cylindrical portion 3 and the bracket 7. And a cylindrical shield member 9 disposed therebetween.

  The bracket 7 is provided in a hook shape toward the outer peripheral surface of the cylindrical portion 3, and the cylindrical portion 3 is press-fitted with the shield member 9 being sandwiched between the cylindrical portion 3 and the bracket 7. Thus, a shell fixing portion 11 for fixing the bracket 7 to the shield shell 5 is provided.

  Further, the shell fixing portion 11 press-fits the end edge portion of the engagement hole portion 13 provided in the cylindrical portion 3, and the shield member 9 is hooked on the shell fixing portion 11 to be removed from the cylindrical portion 3 and the bracket 7. It has been secured.

  Here, although not shown, the shield unit 1 is mounted on a vehicle, accommodates equipment and the like, and has a casing connected to the equipment and the like, or a terminal connected to a terminal portion of the electric wire. It is housed and assembled to the wire lead-out portion side of a housing such as a connector housing from which the wire is drawn out.

  By covering the outer periphery of the electric wire led out from the housing with the shield unit 1, intrusion and leakage of noise and the like can be prevented. Hereinafter, such a shield unit 1 will be described.

  As shown in FIGS. 1 to 4, the shield unit 1 includes a shield shell 5, a bracket 7, and a shield member 9.

  The shield shell 5 is made of a conductive material and is assembled on the side of the casing where the electric wire is led out. The shield shell 5 is provided with a cylindrical portion 3 into which an electric wire is inserted. A bracket 7 is disposed on the inner peripheral side of the cylindrical portion 3.

  The bracket 7 is made of a conductive material, is formed in a cylindrical shape, and is assembled together with the shield shell 5 on the side of the wire lead-out portion of the housing. Further, the bracket 7 is set to have an outer diameter slightly smaller than the inner diameter of the cylindrical portion 3 of the shield shell 5. A shield member 9 is arranged between the bracket 7 and the cylindrical portion 3 of the shield shell 5 in the radial direction.

  The shield member 9 is formed of a braid in which a plurality of conductors made of a conductive material are knitted, and is formed in a cylindrical shape. The shield member 9 is sandwiched and adhered between the inner peripheral surface of the cylindrical portion 3 of the shield shell 5 and the outer peripheral surface of the bracket 7 on the end side, and covers the outer periphery of the electric wire led out from the housing.

  By arranging the shield member 9 in this manner, the shield member 9 is electrically connected to the shield shell 5 and the bracket 7 to form a shield circuit that prevents intrusion and leakage of noise and the like with respect to the electric wire.

  Such a shield member 9 is arranged on the outer periphery of the bracket 7 on the end side, and the bracket 7 is inserted into the inner peripheral side of the cylindrical portion 3 of the shield shell 5, thereby the inner periphery of the cylindrical portion 3 and the bracket 7. It adheres while being pinched between the outer periphery of the.

  The state in which the shield member 9 is sandwiched and adhered between the cylindrical portion 3 and the bracket 7 is the shell fixing portion provided in the bracket 7 at the edge of the engagement hole portion 13 provided in the cylindrical portion 3. 11 is held by press-fitting.

  The engagement hole portion 13 penetrates the inner and outer peripheral surfaces of the cylindrical portion 3 of the shield shell 5 and is provided at a plurality of locations in the circumferential direction of the cylindrical portion 3. The shell fixing portion 11 of the bracket 7 is press-fitted into the engagement hole portion 13 so that the end edge portion is sandwiched in the thickness direction of the cylindrical portion 3.

  The shell fixing portion 11 is provided at a plurality of locations in the circumferential direction of the bracket 7 at positions corresponding to the engaging hole portions 13 of the cylindrical portion 3 so that the shell fixing portion 11 can be bent by one member continuous from the end of the bracket 7. The shell fixing portion 11 is bent so that the free end side protrudes toward the outer peripheral surface side of the cylindrical portion 3, and then toward the insertion direction side of the bracket 7 with respect to the cylindrical portion 3 (on the wire lead-out portion side of the housing). It is bent in the vicinity of the outer peripheral surface of the cylindrical portion 3 and formed into a hook shape.

  Such a shell fixing portion 11 is hooked on the end portion side of the shield member 9 when the shield member 9 is disposed on the outer periphery of the bracket 7. By hooking the shield member 9 on the shell fixing portion 11 in this manner, it is possible to prevent the shield member 9 from dropping from the bracket 7 due to the return of the hook-shaped shell fixing portion 11.

  The bracket 7 with the shield member 9 assembled in this way is bent by pressing the shell fixing portion 11 toward the inside of the bracket 7, and the shell fixing portion 11 is inserted into the cylindrical portion 3 of the shield shell 5. It is inserted into the cylindrical part 3 while continuing to press the shell fixing part 11 until it is done.

  In this state, the pressing of the shell fixing portion 11 is finished, and the bracket 7 is inserted into the cylindrical portion 3, so that the outer peripheral surface of the shell fixing portion 11 slides on the inner peripheral surface of the cylindrical portion 3. It is restored when the shell fixing portion 11 is positioned in the engagement hole portion 13 while moving in the shape portion 3.

  Further, by inserting the bracket 7 into the cylindrical portion 3, the shell fixing portion 11 is press-fitted so as to sandwich the end edge portion of the engagement hole portion 13 in the thickness direction of the cylindrical portion 3, and the bracket 7 is It is fixed to the shield shell 5.

  By fixing the bracket 7 to the shield shell 5 by press-fitting the shell fixing portion 11 into the cylindrical portion 3 in this way, a large jig for reducing the diameter of the cylindrical portion 3 or the cylindrical portion 3 is placed on the outer peripheral side. Therefore, it is not necessary to use another member such as a ring member that is caulked from the top, and the fixing structure can be simplified.

  In such a shield unit 1, the bracket 7 is provided in a hook shape toward the outer peripheral surface side of the tubular portion 3, and the shield member 9 is sandwiched between the tubular portion 3 and the bracket 7. Since the shell fixing part 11 for press-fitting the shape part 3 and fixing the bracket 7 to the shield shell 5 is provided, the cylindrical part 3 of the shield shell 5 is reduced in diameter, or another member is crimped. No process is required.

  Therefore, in such a shield unit 1, the bracket 7 is fixed to the shield shell 5 by press-fitting the cylindrical portion 3 by the shell fixing portion 11, so that the assemblability can be improved with a simple structure.

  Further, since the shield member 9 is hooked on the shell fixing portion 11 and is prevented from coming off from the tubular portion 3 and the bracket 7, the shield member 9 is turned into the shield shell 5 by returning the hook-shaped shell fixing portion 11. And it can prevent reliably coming off from the bracket 7.

(Second Embodiment)
A second embodiment will be described with reference to FIGS.

  In the shield unit 101 according to the present embodiment, the shield member 9 is provided with a folded portion 103 that is inserted through the inner peripheral side of the bracket 7 and is disposed on the outer peripheral side of the bracket 7. The bracket 7 and the shield member 9 are fixed to the shield shell 5 by press-fitting the end portion of the shape portion 3 and the end portion of the folded portion 103.

  Further, the bracket 7 is provided with a shield projection 105 projecting outward, and a slit 107 that allows the shield projection 105 to bend. The shield projection 105 is provided on the outer peripheral side of the bracket 7. The shield member 9 to be arranged is pressed toward the inner peripheral side of the cylindrical portion 3.

  The same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration and functions will be omitted with reference to the first embodiment. However, the configuration is the same as that of the first embodiment. The effect achieved is the same.

  As shown in FIGS. 5 to 8, the shield member 9 is provided with a folded portion 103 that is inserted so as to cover the outer peripheral side of the bracket 7 after being inserted through the inner peripheral side of the bracket 7. The folded portion 103 is folded toward the outer peripheral side of the bracket 7 so that the end portion is positioned at the shell fixing portion 11 of the bracket 7.

  The bracket 7 is inserted into the folded portion 103 and the shield member 9 is assembled to the bracket 7. By inserting the bracket 7 assembled with the shield member 9 into the cylindrical portion 3 of the shield shell 5, the folded portion 103 of the shield member 9 is located between the inner periphery of the cylindrical portion 3 and the outer periphery of the bracket 7. It sticks while being pinched.

  In this way, by sandwiching the folded portion 103 of the shield member 9 between the tubular portion 3 and the bracket 7, the shield member 9 can be prevented from falling off from the shield shell 5 and the bracket 7.

  The state in which the folded portion 103 of the shield member 9 is sandwiched between the tubular portion 3 and the bracket 7 is in close contact with the shell provided on the bracket 7 at the end of the tubular portion 3 and the end of the folded portion 103. The fixing portion 11 is held by press-fitting.

  Specifically, the shell fixing portion 11 of the bracket 7 is inserted into the cylindrical portion 3 of the shield shell 5 by inserting the bracket 7 further into a cylindrical shape between the end of the cylindrical portion 3 and the end of the folded portion 103. The bracket 7 and the shield member 9 are fixed to the shield shell 5 by press-fitting so as to be sandwiched in the thickness direction of the portion 3.

  In the fixed state by the shell fixing portion 11, the end portion of the folded portion 103 is press-fitted into the shell fixing portion 11 together with the end portion of the tubular portion 3, so that the folded portion 103 is sandwiched between the tubular portion 3 and the bracket 7. In addition, the prevention of the shield member 9 from falling off the shield shell 5 and the bracket 7 can be enhanced.

  The end portion of the folded portion 103 of the shield member 9 may be further bent and disposed on the outer peripheral surface side of the end portion of the tubular portion 3, and this portion may be press-fitted into the shell fixing portion 11. In this case, since the shield members 9 are arranged on both surfaces of the end portion of the cylindrical portion 3 and are press-fitted into the shell fixing portion 11, the prevention of the shield member 9 from falling off can be further strengthened.

  Here, the outer diameter of the bracket 7 is set to be substantially equal to the inner diameter of the cylindrical portion 3 of the shield shell 5, and a shield projection 105 and a slit 107 are provided.

  The shield protrusion 105 is provided so as to protrude outward from the bracket 7 so as to protrude toward the outer peripheral surface of the bracket 7. The shield protrusions 105 are provided at a plurality of locations in the circumferential direction of the bracket 7 and can be bent by the slits 107.

  The slit 107 is opened at the shell fixing portion 11 side of the bracket 7, and is provided at a plurality of locations in the circumferential direction of the bracket 7. The slit 107 enables the bracket 7 to be elastically deformed, and allows the shield projection 105 to bend. When the shield projection 105 is bent inward of the bracket 7, the shield projection 105 has the bracket 7. Giving the energizing force toward the outside of the.

  Since such an outer diameter of the bracket 7 is set to be approximately equal to the inner diameter of the cylindrical portion 3 of the shield shell 5, the bracket 7 is pressed from above the folded portion 103 of the shield member 9, and the bracket 107 is formed by the slit 107. 7 is reduced in diameter and inserted into the cylindrical portion 3.

  When the reduced-diameter bracket 7 is inserted into the cylindrical portion 3, the bracket 7 tends to be restored outward by the slit 107. For this reason, when the bracket 7 is inserted into the cylindrical portion 3, the shield projection 105 is always in a state of pressing the shield member 9 toward the inner peripheral surface of the cylindrical portion 3. By thus pressing the shield member 9 with the shield projection 105, the prevention of the shield member 9 from falling off can be further enhanced.

  In addition, when the shield member 9 is assembled to the bracket 7, the end of the folded portion 103 of the shield member 9 is hooked and assembled to the shield projection 105 to prevent the shield member 9 from falling off the bracket 7. Has been. The tubular portion 3 of the shield shell 5 is provided with a window 109 at a position corresponding to the circumferential shielding protrusion 105, and the shell fixing portion 11 has an end portion of the tubular portion 3 and an end portion of the folded portion 103. With the portion being press-fitted, the shield projection 105 is disposed on the window portion 109.

  In such a shield unit 101, the shell fixing portion 11 presses the end of the cylindrical portion 3 and the end of the folded portion 103 to fix the bracket 7 and the shield member 9 to the shield shell 5, so that the cylindrical shape In addition to sandwiching the folded portion 103 of the shield member 9 by the portion 3 and the bracket 7, the shield member 9 is detached from the shield shell 5 and the bracket 7 by press-fitting the end portion of the folded portion 103 into the shell fixing portion 11. Can be reliably prevented.

  Further, since the shielding protrusion 105 presses the shielding member 9 disposed on the outer peripheral side of the bracket 7 toward the inner peripheral side of the cylindrical portion 3, the shielding member 9 is always pushed by the shielding protrusion 105. It is possible to reinforce the fixing of the shield member 9 to the shield shell 5.

  In the shield unit according to the embodiment of the present invention, the shield member is a braid in which a plurality of conductors are knitted. However, the present invention is not limited to this, and a conductive metal foil or metal formed in a sheet shape. As long as it has a cylindrical shape having conductivity, such as a pipe, it may be anything.

  Further, in the shield unit according to the first embodiment of the present invention, the slit is not provided in the bracket, but is not limited thereto, and the outer diameter of the bracket is set substantially equal to the inner diameter of the cylindrical portion of the shield shell, A slit may be provided in the bracket.

DESCRIPTION OF SYMBOLS 1,101 ... Shield unit 3 ... Cylindrical part 5 ... Shield shell 7 ... Bracket 9 ... Shield member 11 ... Shell fixing part 13 ... Engagement hole part 103 ... Folding part 105 ... Shielding protrusion 107 ... Slit

Claims (4)

A shield shell having a tubular portion, a tubular bracket disposed on the inner peripheral side of the tubular portion, and a tubular shield member disposed between the tubular portion and the bracket. A shield unit,
The bracket is provided in a hook shape toward the outer peripheral surface side of the cylindrical portion, and the cylindrical portion is press-fitted in a state where the shield member is sandwiched between the cylindrical portion and the bracket. A shield unit for fixing the bracket to the shield shell is provided. The shield unit according to claim 1,
The shell fixing portion press-fits an end edge portion of an engagement hole provided in the cylindrical portion, and the shield member is hooked on the shell fixing portion to prevent the cylindrical portion and the bracket from coming off. Shield unit characterized by that is made. The shield unit according to claim 1,
The shield member is provided with a folded portion that is inserted through the inner peripheral side of the bracket and disposed on the outer peripheral side of the bracket.
The said shell fixing | fixed part press-fits the edge part of the said cylindrical part, and the edge part of the said folding | turning part, and fixes the said bracket and the said shield member to the said shield shell, The shield unit characterized by the above-mentioned. The shield unit according to any one of claims 1 to 3,
The bracket is provided with a shield projection protruding outward and a slit that allows the shield projection to bend,
The shield projection presses the shield member disposed on the outer peripheral side of the bracket toward the inner peripheral side of the cylindrical portion.

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