JP5557034B2 - Shield shell and shield connector - Google Patents

Description

  The present invention relates to a shield shell and a shield connector.

  Conventionally, the one described in Patent Document 1 is known as a shield connector configured by covering the outer periphery of the inner housing with a shield shell and being accommodated in the outer housing. The shield shell constituting the shield connector is formed by combining a pair of split shells having the same shape. The split shell is formed by pressing a flat plate made of conductive metal or the like, and has a U-shape having a bottom wall and a pair of side walls rising from both ends of the bottom wall. Is provided with an insertion piece, and the other protruding end edge is provided with an insertion portion. Such a split shell is formed into a square-cylindrical shield shell by inserting one of the inserted pieces into the inserted portion of the split shell on the other side and crimping.

JP 2004-158376 A

  However, according to such a configuration, in order to mold the shield shell, in addition to the pressing step of molding the split shell, a processing step of crimping the inserted piece of the split shell and the inserted portion is necessary. There is a concern that the number of processing steps increases and the manufacturing cost increases. Further, since the shield shell is formed by caulking a pair of split shells and then mounted on the inner housing, the shield shell may be misaligned with respect to the inner housing, which may cause backlash.

  The present invention has been completed based on the above circumstances, and provides a shield shell and a shield connector capable of reducing the number of processing steps and preventing shaft misalignment after assembly to a housing. With the goal.

The present invention is a cylindrical shield shell comprising a plurality of divided shells having the same shape and housed in an outer housing in a state assembled to the outer periphery of the inner housing, the divided shell being an outer peripheral surface of the inner housing A plate-like main body extending along the circumferential direction of the main body, and a connecting portion having an insertion piece provided at one end of both ends of the main body in the extending direction and protruding in the extending direction of the main body And provided at the other end of both ends of the main body portion in the extending direction, the insertion port into which the insertion piece is inserted is formed to be open, and is offset outward from the inner housing with respect to the main body portion. By forming the step portion, the hole is formed in advance in the portion to be the insertion port, and the step portion is formed so as to straddle the hole. Formed to straddle When the width direction of the insertion piece is defined as the width direction among the directions intersecting the assembly direction of the divided shells, and the thickness direction of the insertion piece is defined as the thickness direction, The dimension in the width direction of the insertion port is equal to the dimension in the width direction of the insertion piece, the offset dimension in the stepped portion is equal to the dimension in the thickness direction of the insertion piece, and the adjacent split shells wherein a the connected portion which is connected to the connecting portion, provided with, although the difference write piece to the insertion opening said split shell together by being inserted are connected to one another, wherein the said width direction in this connected state It is restricted to move to the thickness direction Rutotomoni, rattling in the front Symbol assembling direction is allowed characterized in Rukoto.

  According to such a configuration, the shield shell is composed of a plurality of divided shells having the same shape, and the divided shells are held in a cylindrical shape on the outer periphery of the inner housing without being crimped to each other, thereby reducing the number of processing steps. can do. As a conventional processing method, for example, when a cylindrical shield shell is formed by bending a metal plate as a material into a square shape, butting the ends together and crimping, In addition, a plurality of bending processes have to be performed, and a process for crimping the end portions is necessary. On the other hand, since the present invention constitutes one shield shell from a plurality of divided shells, the bending process applied to one divided shell is simplified, and the number of machining steps is reduced by making the plurality of divided shells the same shape. In addition, the number of molds associated therewith can be reduced. Furthermore, since the engaging part which hold | maintains the adjacent connection part in the state which overlap | superposed the to-be-connected part without crimping the edge part of a division | segmentation shell is provided, the processing man-hour which caulks a division | segmentation shell mutually is reduced. be able to.

  In addition, since the engaging portion restricts the connecting portion from moving in the width direction and the thickness direction intersecting with the assembling direction of the divided shells, the engaging portion allows the free movement in the assembling direction of the divided shells. While preventing the two shells from being displaced in two directions, it is possible to prevent the shaft from being displaced relative to the inner housing after the shield shell is assembled to the inner housing. As a conventional processing method, for example, a shield shell that is formed into a cylindrical shape by press-molding a metal flat plate into a quadrangular shape or caulking adjacent open ends together by combining a plurality of divided shells is used as the outer periphery of the inner housing. In the case of mounting to the inner housing, there is a possibility that the axial displacement of the shield shell with respect to the inner housing may occur due to molding errors of both the inner housing and the shield shell, resulting in looseness. On the other hand, in the shield shell of the present invention, since the engaging portion of the connected portion allows free movement of the split shells in the assembling direction, the position until the main body portion abuts on the outer surface of the inner housing. The connecting portion can be overlapped with the connected portion, and the axial displacement of the shield shell relative to the inner housing can be eliminated in the assembling direction of the divided shells.

Further , in order to restrict movement in the width direction and thickness direction of the connecting portion (direction intersecting with the assembling direction of the divided shells) and to allow free movement in the extending direction of the main body portion of the connecting portion, This can be easily realized by adjusting the size of the insertion port with respect to the size of each direction of the insertion piece.

Further, in order to perform the regulation of the movement in the thickness direction of the connecting portion due to the difference plug mouth, dimension in the thickness direction of the insertion port, it is necessary to perform quality control so that the predetermined tolerance range . For example, it is expected that the accuracy control will be extremely difficult if the conventional dimension of the insertion port in the thickness direction is knocked out and secured. However, in order to form the stepped portion by offsetting the connected portion itself as in the present invention, it can be formed in a lump by, for example, press molding or the like, and the dimensional accuracy management of the offset dimension is relatively easy. It will be a thing. In this way, if the insertion port is formed so as to straddle the stepped portion, the accuracy management of the thickness direction of the insertion port was indirectly performed by the dimensional accuracy management of the offset dimension which is relatively easy. It becomes. Furthermore, it is possible to make the machining process easier by forming the insertion port straddling the stepped portion than forming the insertion port by knocking it out from the metal plate as the material. For example, a hole may be formed in advance so as to straddle the step portion by forming a hole in advance in a portion to be the insertion port and forming the step portion by press molding so as to straddle the hole. Note that the offset dimension in the stepped portion is assumed to be “equal” to the dimension in the thickness direction of the insertion piece, but this “equal” refers to the exact same dimension of the offset dimension and the thickness direction of the insertion piece. I don't mean. It is sufficient that the insertion piece can be inserted into the insertion port and that the movement of the insertion piece in the thickness direction can be regulated, and the dimensional tolerance is included.

  The split shell may be a pair. According to such a configuration, the split shell assembled in a cylindrical shape on the outer side surface of the inner housing is allowed to move in the assembly direction of the split shells. A pair of opposing outer surfaces can be sandwiched. If the outer housing is held in the outer housing with the sandwiched outer surface side, the shield shell is prevented from being displaced with respect to the inner housing, and the housing can be easily accommodated in the outer housing. Can be improved.

  According to the present invention, it is possible to provide a shield shell and a shield connector that can reduce the number of processing steps and can prevent axial displacement after assembly to a housing.

The rear view of the shield connector concerning one embodiment of the present invention AA sectional view of FIG. BB sectional view of FIG. Plan view of shield connector CC sectional view of FIG. Plan view of the split shell that composes the shield shell Rear view Side view DD sectional view of FIG. Plan view of shield shell EE sectional view of FIG. Rear view of shield shell

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS.
The shield shell in the present embodiment exemplifies a case where the shield shell is applied to the shield shell 20 housed in the shield connector 10 that supplies electric power to an in-vehicle device (not shown). As shown in FIG. 1, the shield connector 10 houses an inner housing 11 that houses a terminal fitting (not shown), a shield shell 20 that surrounds the outer periphery of the inner housing 11, and the inner housing 11 and the shield shell 20. And an outer housing 30. In the following description, the vertical direction in FIG. 1 is the vertical direction, the front side of the paper is the rear side, and the back side of the paper is the front side.

  The inner housing 11 is made of synthetic resin, and as shown in FIGS. 1 to 3, two cavities 12 that can accommodate terminal fittings (not shown) are formed side by side in the front-rear direction. A lance 13 extending in a cantilevered manner toward the front is formed on the inner wall of the cavity 12, and the terminal fitting inserted into the cavity 12 is retained by the lance 13 to prevent the lance 13 from being pulled out. . From the rear part of the cavity 12, the shield electric wire fixed to the rear end of the inserted terminal fitting is led out. On the other hand, the cavity 12 communicates with the inside of a hood portion 31 of an outer housing 30 described later through its front end opening.

  The outer housing 30 is made of a synthetic resin and has a cylindrical shape penetrating in the front-rear direction, and a hood portion 31 that can be fitted with a mating connector (not shown) is formed in the front portion thereof. Flange portions 32 projecting from the substantially central position in the front-rear direction of the outer housing 30 to the outer periphery are provided over the entire circumference, and attachment holes 33 for attaching to attached members (not shown) are formed through the four corners. Yes. Further, on the rear surface side of the flange portion 32, a seal ring 34 for sealing between the shield connector 10 and the attached member and a seal ring housing groove 35 for housing the seal ring 34 are provided.

  The shield shell 20 is made of a conductive metal, and will be described in detail later. The shield shell 20 is formed by combining two divided shells 21 having the same shape, and can be inserted into the outer housing 30 while being fitted to the outer periphery of the inner housing 11. It is said that. As shown in FIG. 3, a locking claw 22 is cut and raised inward on both sides in the width direction of the shield shell 20, and corresponds to the locking claw 22 in both sides in the width direction of the inner housing 11. A locking step portion 14 is provided at the position where this is performed. By locking the locking claw 22 to the locking step portion 14, the shield shell 20 can be attached to the inner housing 11 while being prevented from coming out backward.

  A plurality of elastic contact pieces 23 are provided at the rear of the shield shell 20. Specifically, a pair is provided on both sides in the width direction, and two pairs are provided on both sides in the vertical direction. As a whole, the pair is provided with a predetermined interval in the circumferential direction of the inner housing 11. The elastic contact piece 23 is formed by folding forward from the rear edge of the divided shell 21. A housing groove 36 for housing the front edge of the elastic contact piece 23 is formed on the rear surface side of the flange portion 32 of the outer housing 30 and on the inner peripheral side of the seal ring housing groove 35 (FIG. 2). And FIG. 3). In the inner housing 11 inserted from the rear of the outer housing 30 and the shield shell 20 fitted on the outer periphery thereof, the elastic contact piece 23 is accommodated in the accommodation groove 36, and the shield shell 20 is pulled forward with respect to the outer housing 30. Can be installed in a stopped state. Further, the opening size of the accommodation groove 36 is set so as not to interfere with the front edge of the elastic contact piece 23 when the elastic contact piece 23 is bent and deformed.

  As shown in FIG. 5, ribs 37 are provided on the inner wall 30 </ b> A of the outer housing 30 so as to project along the axial direction in two vertical directions and one right and left. Since the inner housing 11 and the shield shell 20 inserted into the outer housing 30 are supported by the ribs 37, they are accommodated in the outer housing 30 in a suspended state in which the outer peripheral surface of the shield shell 20 is not in contact with the inner wall 30A of the outer housing 30. The Rukoto.

Subsequently, two divided shells 21 constituting the shield shell 20 will be described with reference to FIGS. 6 to 12. Since the two divided shells 21 have the same configuration, the divided shell 21 on the right side of FIG. 10 will be described as a representative in the following.
The split shell 21 is formed by bending a metal plate material punched into a predetermined shape, and the main body portion disposed along the outer peripheral surface of the inner housing 11 has both sides in the width direction of the inner housing 11. The side wall 25 corresponding to the surface is formed with the locking claw 22, and the upper wall 26 </ b> A and the lower wall 26 </ b> B rise from both ends of the side wall 25 and correspond to either the upper or lower side surface of the inner housing 11. The lower wall 26 </ b> B is configured to extend substantially linearly with respect to the side wall 25, and the extended end portion overlaps a connected portion 28 described later when the divided shell 21 is assembled. The connecting portion 27 is used. As shown in FIG. 10, the connecting portion 27 is provided with two insertion pieces 27 </ b> A that protrude along the extending direction.

  The upper wall 26A includes a base portion 26C that is substantially perpendicular to the side wall 25 and extends substantially linearly, and a connected portion 28 that is further extended from the base portion 26C. A stepped portion 28A is formed in the coupled portion 28 by offsetting it to the outside (the side opposite to the side where the inner housing 11 is disposed and the side away from the lower wall 26B) with respect to the base portion 26C. As shown in FIG. 9, the height a of the stepped portion 28A in the vertical direction is approximately twice the thickness b of the insertion piece 27A.

  The connected portion 28 is provided with two insertion ports 29 that are formed so as to extend across the stepped portion 28 </ b> A in the front-rear direction, and the connecting portion 27 of the split shell 21 on the mating side is connected to the connected portion. The insertion piece 27 </ b> A can be inserted in a state of being superimposed on the inner side of 28 (inner housing 11 side). As shown in FIG. 10, the width dimension c of the insertion port 29 in the front-rear direction is substantially the same as the width dimension d of the inserted insertion piece 27A. Further, the dimension in the thickness direction of the insertion port 29, that is, the offset dimension represented as the dimension e in FIG. 9 is substantially the same as the thickness b of the insertion piece 27A.

  In order to assemble such a divided shell 21, first, the connecting portion 27 of one divided shell 21 is positioned so as to be inside the connected portion 28 of the other divided shell 21, and the insertion pieces 27 </ b> A are respectively correspondingly inserted. Insert it into the slot 29. In the insertion piece 27A and the insertion port 29 provided in two pairs at the top and bottom, the upper two insertion pieces 27A and the lower two insertion pieces 27A are directed to the respective insertion ports 29 in opposite directions. The inserted insertion piece 27A is abutted against the inner peripheral edge portion 29A of the insertion port 29 facing the leading edge, and the cylindrical shield shell 20 shown in FIGS. 10 to 12 is completed. In the state assembled as the shield shell 20, the outer peripheral edge portion of each insertion piece 27 is disposed to face the inner peripheral edge portion 29 </ b> A of the insertion port 29, and the connecting portion 27 overlaps the connected portion 28. 27 and the insertion piece 27A and the base portion 26C of the upper wall 26A are arranged in a straight line.

Then, the effect | action in this embodiment is demonstrated.
First, the shield shell 20 is assembled so as to cover the outer periphery of the inner housing 11. The divided shells 21 are assembled from both sides in the width direction of the inner housing 11 so that the side walls 25 of the divided shells 21 are on both sides of the inner housing 11 in the width direction, and each insertion piece 27A is inserted into the corresponding insertion port 29. I will do it. Here, the insertion piece 27A is inserted into the insertion port 29 so that the pair of split shells 21 are connected to each other, but the insertion port 29 connects the connecting portion 27 between the split shells via the insertion piece 27A. It is in a state that allows movement in the assembling direction. More specifically, the pair of split shells 21 are not restricted at all in the direction in which the side walls 25 move away from each other, and the leading edge of the insertion piece 27A is connected to the inner peripheral edge 29A of the insertion port 29 in the approaching direction. Since the displacement is possible up to the abutting position, the width dimension of the shield shell 20 can be adjusted to the width dimension of the inner housing 11 though it is in a predetermined range. Therefore, since the insertion piece 27A can be inserted into the insertion port 29 until the side wall 25 abuts on both sides of the inner housing 11 in the width direction, the engagement claw of the split shell 21 is engaged with the engagement step portion 14 of the inner housing 11. 22 can be reliably latched, and at least the shield shell 20 can be held in a state in which the shield shell 20 is prevented from coming off with respect to the inner housing 11. In this way, the assembly of the shield shell 20 to the inner housing 11 is completed. Thereafter, the both sides of the inner housing 11 in the width direction are sandwiched and held between the side walls 25 of the shield shell 20, and these are inserted into the outer housing 30, whereby the shield connector 10 can be assembled.

  As described above, according to the present embodiment, the shield shell 20 is composed of a pair of split shells 21 having the same shape, and the split shells 21 are held in a cylindrical shape on the outer periphery of the inner housing 11 without being crimped to each other. Therefore, the number of processing steps can be reduced. For example, in the case of forming a cylindrical shield shell by bending a metal plate as a material into a square shape, butting the ends together and crimping, a plurality of times with respect to the integral shield shell. In addition, a bending process for crimping the end portions is necessary. On the other hand, in this embodiment, since one shield shell 20 is composed of a pair of split shells 21, the bending process applied to one split shell 21 is simplified, and the split shells 21 have the same shape. Thus, the processing man-hour and the number of dies accompanying it can be reduced. Further, the split shell 21 can be held in the assembled state, that is, the cylindrical shield shell 20 by inserting the insertion piece 27A into the insertion port 29 without crimping the end portions of the split shell 21 to each other. Therefore, it is possible to reduce the number of processing steps required for crimping the divided shells to each other.

  In addition, the dimension e in the thickness direction of the insertion port 29 is substantially the same as the thickness b of the insertion piece 27A, and the width dimension c of the insertion port 29 is also substantially the same as the width dimension d of the insertion piece 27A. Therefore, the split shells 21 are regulated in the two directions of the vertical direction and the front-rear direction, and can prevent the split shells 21 from shifting in the same two directions. Further, floating is allowed in the assembling direction of the divided shells, and no restriction is imposed on the direction in which the side walls 25 move away as described above, and the leading edge of the insertion piece 27A in the approaching direction. Can be displaced up to a position where it hits the inner peripheral edge 29A of the insertion port 29, so that it can be adjusted to the width of the inner housing 11 within a predetermined range, and the shaft of the shield shell 20 with respect to the inner housing 11 can be adjusted. Deviation can be prevented.

  That is, for example, a conventional shield shell that is formed into a cylindrical shape by crimping adjacent open ends by pressing a metal flat plate into a square shape or combining a plurality of divided shells on the outer periphery of the inner housing. In the case of mounting, the axial displacement of the shield shell with respect to the inner housing may occur due to molding errors of both the inner housing and the shield shell, which may cause backlash. On the other hand, since the shield shell 20 of the present embodiment can be adjusted to the width dimension of the inner housing 11, at least the axial displacement of the shield shell 20 with respect to the inner housing 11 with respect to the assembly direction of the divided shells. It can be reliably prevented.

  Further, when the inner housing 11 assembled with the shield shell 20 is inserted into the outer housing 30, the inner housing 11 can be sandwiched and held by the shield shell 20 whose dimensions in the width direction can be changed. The working efficiency at the time of inserting can be improved.

  Moreover, the connection structure which hold | maintains the division | segmentation shell 21 in a cylinder shape like this embodiment is made into the insertion port 29 and the insertion piece 27A, and the regulation of two directions of the up-down direction and the front-back direction of the division | segmentation shells 21 is carried out. It can be done easily. That is, if the dimension accuracy management of the dimension e and the width dimension c of the insertion port 29 and the thickness b and the width dimension d of the insertion piece 27A is performed, the restriction in the two directions can be realized. Become.

  Further, by forming the insertion port 29 across the stepped portion 28A, it is easier to manage the dimensional accuracy of the dimension e in the thickness direction than securing the insertion port by knocking it outward from the upper and lower walls. In addition, the insertion port 29 itself can be easily processed.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, the shield shell 20 is composed of two divided shells 21, but is not limited thereto, and may be composed of three or more divided shells 21. If the shield shell 20 is composed of a larger number of divided shells 21 having the same shape, the shape of one divided shell 21 can be simplified and the processing can be facilitated. For example, when the shield shell is constituted by four divided shells, the dimension of the shield shell in two directions can be changed. Therefore, the axial displacement of the shield shell 20 with respect to the inner housing 11 in two directions is prevented. Can be prevented.

DESCRIPTION OF SYMBOLS 10 ... Shield connector 11 ... Inner housing 14 ... Locking step part 20 ... Shield shell 21 ... Split shell 22 ... Locking claw 23 ... Elastic contact piece 25 ... Side wall (body part)
26A ... Upper wall 26B ... Lower wall 26C ... Base 27 ... Connecting portion 27A ... Insert piece 28 ... Connected portion 28A ... Stepped portion 29 ... Insertion port (engagement portion)
30 ... Outer housing 31 ... Hood 32 ... Flange

Claims (3)

A cylindrical shield shell comprising a plurality of divided shells having the same shape and housed in the outer housing in a state assembled to the outer periphery of the inner housing,
The split shell is
A plate-like main body extending in the circumferential direction along the outer peripheral surface of the inner housing;
A connecting portion provided at one end of both ends of the main body portion in the extending direction and having an insertion piece protruding in the extending direction of the main body portion ;
Provided at the other end of both ends of the main body in the extending direction, and formed with an insertion opening into which the insertion piece is inserted, and is offset outward from the inner housing with respect to the main body. A stepped portion is formed, and the insertion port spans the stepped portion by forming a hole in advance in the portion that becomes the insertion port and forming the stepped portion across the hole. The width direction of the insertion piece is defined as the width direction among the directions intersecting the assembly direction of the divided shells, and the thickness direction of the insertion piece is defined as the thickness direction. In this case, the width direction dimension of the insertion port is equal to the width direction dimension of the insertion piece, and the offset dimension in the stepped portion is equal to the thickness direction dimension of the insertion piece and adjacent to each other. A connected portion connected to the connecting portion of the split shell; Provided,
Although the difference write pieces of the divided shell together by being inserted are connected to each other in the insertion opening, this is in connected state is restricted to move to said thickness direction and the width direction Rutotomoni, before shielding shell characterized by Rukoto rattling in the serial assembling direction is allowed. The shield shell according to claim 1, wherein the divided shell includes a pair. A shield connector comprising the shield shell according to claim 1 .

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