JP2010251178A - Shield shell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid deterioration of a shielding performance. <P>SOLUTION: A shield shell 20 includes a metal shell body 21 formed of a top plate 22, both right and left side plates 23, and a rear plate 24, a board connection piece 27 formed in the shell body 21, an earth connection part 36 out of contact with the shell body 21 and conductively fixed to a shield case 40 (earth member), and a deflection portion 30 formed so as to continue from the shell body 21 and the earth connection part 36 and capable of relative displacement with respect to the top plate 22. Deviation of the fixed position of the earth connection part 36 on the shield case 40 is absorbed by deformation of the deflection portion 30. Because the deflection portion 30 is displaced relative to the top plate 22 of the shell body 21, the top plate 22 does not deform even when the deflection portion 30 elastically deforms. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shield shell.

  Patent Document 1 discloses a shield shell used for a board connector. The shield shell is formed by bending a metal plate having a predetermined shape, and includes a shell main body configured to cover the connector housing, and a ground connection portion that is fixed to be conductive to the ground member.

  The shell body has a box shape composed of a top plate, a rear plate connected to the rear edge of the top plate, and left and right side plates connected to the left and right side edges of the rear plate. The circuit board is connected to the circuit board through the board connection piece formed on the board. The ground connection portion is configured to rise upward from the front edge of the top plate. The top plate and the left and right side plates are arranged so as to be adjacent to each other via a ridge line in the front-rear direction, but the top plate is separated so as to be displaced in the vertical direction relative to the left and right side plates.

  According to this separation mode, even if the fixing position of the ground connection portion on the ground member may vary up and down, the upper surface plate moves in the vertical direction relative to the left and right side plates together with the ground connection portion. By displacing, variation in the fixing position of the ground connection portion is absorbed. In addition, since the left and right side plates and the rear plate on which the board connection pieces are formed are held in a state of being fixed to the circuit board, there is no possibility that excessive stress is generated in the connection portion between the board connection pieces and the circuit board. .

JP 2008-171725 A

In the above connector, when the upper surface plate is displaced upward, a large slit-shaped gap is formed between the left and right side edges of the upper surface plate and the upper edges of the left and right side surface plates. Concerned.
The present invention has been completed based on the above circumstances, and an object thereof is to avoid a decrease in shielding performance.

  As means for achieving the above-mentioned object, the invention of claim 1 is a form for covering the connector housing, comprising a metal shell main body constituted by a plurality of plate portions, and a circuit formed on the shell main body. The board connection piece connected to the board and the shell body are non-contact, and are connected to the ground connection part fixed to be conductive to the ground member, and the shell body and the ground connection part. And a flexible portion that can be displaced relative to the plate portion.

  The invention according to claim 2 is the one according to claim 1, wherein the shell body is formed into a box shape by bending a metal plate material having a predetermined shape, and the other of the plurality of plate portions The said board parts arrange | positioned so that it may adjoin through the state indirectly connected via the board part has the characteristic in the place where relative displacement is controlled by the latching action of a control part.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the flexible portion has a flat plate shape as a whole, and is divided into plural slits and connected to each other so as to be relatively displaceable. It is characterized by the fact that the ground connection portion is formed on any one of the plurality of flexible pieces.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the bending portion includes a first flexible piece and a second flexible piece defined by the substantially U-shaped slit. The flexible piece occupies an area outside the slit and is connected to the plate portion constituting the shell body, and the second flexible piece occupying the area surrounded by the slit includes: The ground connection portion is formed, and a boundary line connecting the first flexible piece and the plate portion and a boundary line connecting the first flexible piece and the second flexible piece are mutually It is characterized in that it is parallel and disposed on opposite sides of the ground connection portion.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the bent portion has a plate shape, and the ground connection portion performs burring on a part of the bent portion. Thus, it is characterized in that it is formed in a through-hole shape.

<Invention of Claim 1>
Since the variation in the fixing position of the ground connection portion in the ground member is absorbed by the deformation of the bending portion, stress concentration at the connection portion between the board connection piece and the board connection piece and the circuit board is avoided. Since the bending portion is not displaced integrally with the plate portion constituting the shell body, but can be relatively displaced with respect to the plate portion, the plate portion may be deformed even if the bending portion is elastically deformed. There is no risk of the shell body being deformed. Therefore, there is no possibility that the shielding performance of the shell body will be reduced.

<Invention of Claim 2>
Among the plurality of plate portions, the plate portions arranged so as to be adjacent to each other through the other plate portions are relatively displaced so as to be separated when the bending portion is elastically deformed, and as a result, There is a concern that a slit-shaped gap is generated between the adjacent plate portions. However, in the invention of the present application, the relative displacement between the plate portions arranged so as to be adjacent to each other via the other plate portion is restricted by the locking action of the restriction portion. There is no possibility that a gap is formed between the mating plate portions, and the shielding performance of the shell body can be stabilized.

<Invention of Claim 3>
Since the bending portion is constituted by a plurality of flexible pieces that are connected to each other so as to be relatively displaceable, the amount of bending of the entire bending portion due to the displacement of the ground connection portion is distributed to the plurality of flexible pieces, and the bending portion. Stress concentration in can be avoided. Therefore, it is not necessary to increase the size of the bending portion in order to avoid stress concentration.

<Invention of Claim 4>
When the ground connection portion is displaced relative to the shell body, the first flexible piece is displaced obliquely with the boundary connected to the shell body as a fulcrum, and the second flexible piece is changed to the first flexible piece. It is displaced diagonally with the continuous boundary as a fulcrum.

<Invention of Claim 5>
Since a part of the bent portion serves as a ground connecting portion, the shield shell as a whole can be reduced in size and simplified in shape as compared with a mode in which the ground connecting portion is formed separately from the bent portion. .

Sectional drawing showing the state which fixed the connection part for earth | ground of the shield shell to the shield case in Embodiment 1 Cross section of shield shell Sectional view showing the state where the shield connector including the shield shell and the circuit board are housed in the shield case Perspective view of shield shell

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The shield shell 20 of the present embodiment is attached to the circuit board P and constitutes the shield connector A accommodated in the shield case 40 (the ground member which is a constituent element of the present invention). In the following description, the vertical direction is based on a state in which the circuit board P is horizontally arranged and the shield connector A is assembled to the circuit board P. Further, in the front-rear direction, the front direction of the shield connector A is referred to as the front.

  In the circuit board P, a plurality of connection holes H penetrating in the vertical direction are formed. A shield connector A is mounted on the upper surface of the circuit board P so as to be placed thereon. The shield case 40 is made of metal, and includes an upper surface wall 41 located above the circuit board P, side walls (not shown) extending downward from the left and right side edges of the upper surface wall 41, and the upper surface wall 41. A front wall 42 extending downward from the front edge of the front wall and continuing to the left and right side walls. Bolt holes 43 that penetrate in the front-rear direction are formed in the front wall 42.

  The shield connector A is configured by assembling a synthetic resin connector housing 10, a plurality of elongated terminal fittings 13 bent in an L shape, and a metal shield shell 20. The connector housing 10 is formed by integrally forming a terminal holding portion 11 having a wall shape substantially perpendicular to the circuit board P and a rectangular tube-shaped hood portion 12 that extends forward from the terminal holding portion 11 in a cantilevered manner. It is. The terminal holding portion 11 holds a terminal connection portion 14 extending in the horizontal direction (front) of the terminal fitting 13 in a state of penetrating in the front-rear direction, and the front end portion of the terminal connection portion 14 is accommodated in the hood portion 12. Has been. The downward board connecting portion 15 of the terminal fitting 13 is arranged behind the terminal holding portion 11.

  The shield shell 20 is formed by bending and burring a metal plate material (not shown) punched into a predetermined shape, and includes a shell body 21, a restriction portion 25, a board connection piece 27, and a bending portion. 30 and the ground connection part 36 are integrally formed.

  The shell body 21 includes a rectangular upper surface plate 22 (a plate portion that is a constituent element of the present invention), a square left and right side surface plate 23 (a plate portion that is a constituent element of the present invention), and a square rear surface plate 24 (the present invention). And a plate portion), which is a constituent element of the above, is formed so as to form a box shape in which the front surface and the lower surface are opened. The rear edge of the upper surface plate 22 and the upper edge of the rear surface plate 24 are directly connected so as to form a substantially right angle, and the right edge of the upper surface plate 22 and the upper edge of the right surface plate 23 are directly connected so as to form a substantially right angle. The left side edge of the upper surface plate 22 and the upper end edge of the left side surface plate 23 are directly connected substantially at right angles.

  That is, the rear surface plate 24 and the left and right side surface plates 23 are not directly connected to each other and are in a positional relationship such that they are adjacent to each other at a substantially right angle in a form of being indirectly connected via the upper surface plate 22. For this reason, the shell body 21 may be deformed in such a manner as to widen a gap between the side edge of the rear surface plate 24 and the rear edge of the left side surface plate 23 or the right side surface plate 23. If such deformation that widens the gap occurs, the shield function of the shell main body 21 may be deteriorated. Therefore, as a countermeasure, the restricting portion 25 is formed.

  The restricting portion 25 is formed on the left and right side plates 23. A vertically long support plate portion 26 that is bent inwardly extends from a substantially lower half region of the rear edges of the left and right side surface plates 23 so that the support plate portion 26 extends along the front surface (inner surface) of the rear plate 24. is doing. And it forms in the form extended from the lower edge of this both right-and-left support plate part 26 so that the control part 25 might be turned up. The left and right restricting portions 25 are arranged along the rear surface (outer surface) of the rear plate 24 or in contact with the rear surface of the rear plate 24. Due to the presence of the restricting portion 25, the rear surface plate 24 is displaced (separated) relatively rearward with respect to the left and right side surface plates 23, that is, the gap between the rear surface plate 24 and the left and right side surface plates 23 is increased. Be regulated.

  The rear plate 24 is formed with a board connection piece 27 protruding downward from the lower edge. The board connecting pieces 27 are formed in a pair of left and right, and are disposed so as to be sandwiched between the pair of left and right restricting portions 25 and close to the restricting portions 25.

  A connector housing 10 is accommodated in the shell main body 21. Thereby, the upper surface, the rear surface, and the left and right side surfaces of the connector housing 10 are covered with the shell body 21. In a state in which the shell main body 21 and the connector housing 10 are assembled, the lower end portion of the board connecting portion 15 of the terminal fitting 13 is more than the lower end edge of the shell main body 21 so that it can be inserted into the connection hole H of the circuit board P. Furthermore, it protrudes downward.

  Next, the bending part 30 is demonstrated. The flexible part 30 has a rectangular shape as a whole, and has a flat plate shape whose width dimension is substantially the same as that of the upper surface plate 22 (shell body 21). The bent portion 30 extends upward from the front end edge of the upper surface plate 22 substantially at a right angle to the upper surface plate 22 (that is, substantially parallel to the rear surface plate 24) (ie, the direction in which the left and right side plates 23 and the rear surface plate 24 extend from the upper surface plate 22). In the opposite direction) to a cantilever shape. In a state in which the shield connector A is assembled to the circuit board P and accommodated in the shield case 40, the bending portion 30 approaches the inner surface of the front wall 42 of the shield case 40 from the rear and faces substantially parallel. .

  The bending portion 30 is composed of a first flexible piece 31 and a second flexible piece 32. A single slit 33 having a substantially U shape when viewed from the front or the rear is formed in the bending portion 30 so as to penetrate in the front-rear direction. The slit 33 is composed of a pair of left and right vertical grooves 34 extending in the vertical direction and a horizontal groove 35 extending horizontally (left and right direction) so as to connect the lower ends of the vertical grooves 34. A square region surrounded by a substantially U-shaped slit 33 and a horizontal imaginary line connecting the upper ends of the left and right vertical grooves 34 in the flexure 30 is a second flexible piece 32. A region outside the slit 33 in the bent portion 30, that is, a frame-like region surrounding the second flexible piece 32 over the entire circumference is the first flexible piece 31.

  The second flexible piece 32 is formed with a ground connection portion 36 by performing burring on the substantially central portion thereof. The ground connection portion 36 has a shape that protrudes in a cylindrical shape from the second flexible piece 32 to the rear side (the side opposite to the front wall 42 of the shield case 40), and the center hole penetrates forward and backward. In a state where the shield connector A is accommodated in the shield case 40, the ground connection part 36 corresponds to the bolt hole 43 of the shield case 40 substantially coaxially.

  The lower end edge of the first flexible piece 31 is connected to the front end edge of the upper surface plate 22, and the first boundary line 37 in the left-right direction where the first flexible piece 31 and the upper surface plate 22 are connected is the ground connection portion 36. Arrange below. On the other hand, the second boundary line 38 in the left-right direction where the first flexible piece 31 and the second flexible piece 32 are continuous is located above the ground connection portion 36. That is, the first boundary line 37 and the second boundary line 38 are parallel to each other, and are in a positional relationship so as to be located on opposite sides of the ground connection portion 36.

  The flexible portion 30 can be relatively displaced in the front-rear direction with respect to the shell body 21 with the first boundary line 37 as a fulcrum while being elastically deformed as a whole. In other words, the first flexible piece 31 can be relatively displaced in the front-rear direction with respect to the shell body 21 with the first boundary line 37 (that is, the lower edge of the first flexible piece 31) as a fulcrum while being elastically deformed. It has become. Further, the second flexible piece 32 is relatively deformed in the front-rear direction with respect to the first flexible piece 31 with the second boundary line 38 (that is, the upper edge of the second flexible piece 32) as a fulcrum while being elastically deformed. To get. These relative displacements in the front-rear direction can occur simultaneously and independently.

  When the shield connector A is assembled, the terminal fitting 13 is attached to the connector housing 10, and the shield connector A and the terminal fitting 13 are attached to the shield shell 20. At this time, the connector housing 10 and the shell body 21 are held in an assembled state by the locking action of a locking portion (not shown) formed in the connector housing 10 and the shell body 21. When the shield connector A is assembled to the circuit board P, the connector housing 10 is inserted into the predetermined connection hole H while the board connection portion 15 of the terminal fitting 13 and the board connection piece 27 of the shield shell 20 are inserted into the predetermined connection holes H, respectively. The connector housing 10 is mounted on the upper surface of P and fixed to the circuit board P by fixing means such as bolt fastening.

  Thereafter, when the board connecting portion 15 and the board connecting piece 27 inserted into the connection hole H are fixed to the circuit board P by soldering, the shield connector A is assembled to the circuit board P. When the assembled shield connector A and circuit board P are accommodated in the shield case 40 and fixed at a predetermined position, the ground connection portion 36 is slightly spaced from the front wall 42 of the shield case 40 and the bolt hole 43. It will be in the state which opposes coaxially.

  The positional relationship between the ground connection portion 36 and the front wall 42 (that is, the relative fixing position of the ground connection portion 36 in the shield case 40) is the longitudinal direction due to the dimensional tolerance and assembly tolerance of each component. The ground connection 36 and the front wall 42 may interfere with each other due to the variation. In order to avoid this interference, the ground connection 36 and the front wall 42 may be The dimensions are set so as to leave a gap (see FIG. 3).

  After the shield connector A is fixed in the shield case 40, the bolt 44 is inserted into the bolt hole 43 from the outside of the shield case 40 and screwed into the inner periphery of the ground connection portion 36. In the process of screwing the bolt 44, after the head portion 45 of the bolt 44 comes into contact with the outer surface (front surface) of the front wall 42, the ground connection portion 36 is gradually drawn toward the front wall 42. When the front end of the ground connection portion 36 comes into contact with the front wall 42, the screw 44 is prevented from being screwed, and the front wall 42 and the ground connection portion 36 are fixed so as to be electrically conductive.

  In the process in which the ground connection portion 36 is pulled toward the shield case 40 as the bolts 44 are screwed, the shell body 21 is fixed to the shield case 40 via the circuit board P in a movement-restricted state. Is elastically deformed. That is, the first flexible piece 31 is deformed while tilting its posture so that the upper end side is displaced forward with the first boundary line 37 at the lower end as a fulcrum, and the second flexible piece 32 is With the second boundary line 38 at the upper end as a fulcrum, the deformation is performed while the posture is inclined obliquely so that the lower end side is displaced forward.

  The elastic deformation of the bending portion 30 in this way absorbs the variation in the positional relationship between the ground connection portion 36 and the front wall 42, and thereby, in the soldered portion of the board connection piece 27 in the circuit board P. The ground connection portion 36 is correctly fixed to the front wall 42 so as to be conductive while avoiding stress concentration caused by an excessive external force.

  The shield shell 20 of the present embodiment is formed so as to be connected to the shell main body 21 and the ground connection portion 36 after the ground connection portion 36 is not in contact with the shell main body 21, and is formed on the upper surface plate 22. On the other hand, the bending part 30 which can be displaced relatively is provided. The bent portion 30 is not displaced integrally with the upper surface plate 22 constituting the shell main body 21, but is relatively displaceable with respect to the upper surface plate 22. Therefore, even if the bent portion 30 is elastically deformed, The face plate 22 is not deformed, and therefore, the left and right side face plates 23 and the rear face plate 24 are not deformed. In this way, even if the bending portion 30 is deformed as the ground connection portion 36 is fixed to the shield case 40, the shell body 21 is not likely to be deformed. Therefore, the rear plate 24 and the left and right side plates 23 are not deformed. There is no possibility that the shielding performance of the shell main body 21 is lowered.

  Further, the shell body 21 is formed in a box shape by bending a metal plate material of a predetermined shape, and is arranged so as to be adjacent to each other in an indirectly connected state via the upper surface plate 22 among the plurality of plate portions. The relative displacement of the rear surface plate 24 and the left and right side surface plates 23 is restricted by the locking action of the restriction portion 25. Due to the locking action of the restricting portion 25, the generation of a gap between the rear face plate 24 and the left and right side face plates 23 is more reliably restricted, and the shielding performance of the shell body 21 can be stabilized.

  In addition, the flexible portion 30 has a flat plate shape as a whole, and is configured by a first flexible piece 31 and a second flexible piece 32 that are partitioned by the slit 33 and connected to each other so as to be relatively displaceable. A ground connection 36 is formed on the flexible piece 32. Thus, since the bending part 30 of this embodiment is comprised by the two flexible pieces 31 and 32 connected so that relative displacement was mutually possible, the bending of the whole bending part 30 accompanying the displacement of the connection part 36 for earth | grounds The amount is distributed to the two flexible pieces 31, 32, and stress concentration in the bent portion 30 can be avoided. Therefore, it is not necessary to increase the size of the flexure 30 for the purpose of avoiding stress concentration.

  Further, paying attention to the point that the bent portion 30 has a plate shape, in the present embodiment, the ground connection portion 36 is penetrated by performing a burring process on a part of the bent portion 30 (second flexible piece 32). It formed in the shape of a hole. In this embodiment, since a part of the bending part 30 is the ground connection part 36, the size and shape of the shield shell 20 as a whole can be reduced as compared with the form in which the ground connection part is formed separately from the bending part. Simplification is realized.

<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 rear plate and the side plate that are arranged so as to be adjacent to each other in a state of being indirectly connected via the upper surface plate among the plurality of plate portions constituting the shell main body, Although the relative displacement is restricted by the stopping action, such a restriction part may not be provided.
(2) The shell main body of the above embodiment is configured such that the rear plate and the side plate are indirectly connected via the upper surface plate. However, in the shell main body, the upper surface plate and the side plate are indirectly connected via the rear plate. It is good also as a form, and it is good also as a form which an upper surface board and a rear surface board connect indirectly via one of the left and right side boards.
(3) In the said embodiment, although the bending part was made into flat form as a whole, the bending part may be a plate-shaped thing which has a bending surface or a curved surface.
(4) In the above-described embodiment, the bent portion is a square as a whole, but the overall shape of the bent portion is not limited to a square, and may be a shape other than a square such as a trapezoid or a triangle.
(5) In the above embodiment, the number of the flexible pieces constituting the bending portion is two, but the bending portion may be constituted by three or more flexible pieces.
(6) In the above embodiment, the shape of the slit that divides the two flexible pieces is substantially U-shaped, but the shape of the slit is a shape other than a substantially U-shape, such as a V-shape, an I-shape, or an L-shape. May be.
(7) Although the number of slits is one in the above embodiment, a plurality of slits may be provided.
(8) In the above embodiment, the ground connection portion is formed in a through-hole shape by burring, but the ground connection portion may have a form in which a female screw hole is formed in a thick mother body. The nut may be fixed to the nut.
(9) In the said embodiment, although the connection part for earth | grounds was formed in a part of bending part, the thing of the form independent of the bending part may be sufficient as the connection part for earthing | grounding.
(10) In the above embodiment, the boundary line connecting the first flexible piece and the plate portion and the boundary line connecting the first flexible piece and the second flexible piece are parallel to each other. The two boundary lines may be arranged so as not to be parallel to each other.
(11) In the above-described embodiment, the boundary line connecting the first flexible piece and the plate portion and the boundary line connecting the first flexible piece and the second flexible piece are located on both sides of the ground connection portion. The boundary line between the first flexible piece and the second flexible piece is located between the boundary line between the first flexible piece and the plate portion and the ground connection portion. You may arrange in.
(12) In the above embodiment, the board connection piece is connected to the circuit board by soldering. However, the board connection piece is of a press-fit type having an elastically deformable connection portion, and is connected to the connection hole of the circuit board. On the other hand, the board connecting piece may be penetrated in an elastically bent state.
(13) In the above-described embodiment, the bent portion is connected to the upper surface plate. However, the bent portion may be connected to the side plate or may be connected to the rear plate.

DESCRIPTION OF SYMBOLS 10 ... Connector housing 20 ... Shield shell 21 ... Shell main body 22 ... Top plate (plate part)
23 ... Side plate (plate part)
24 ... Rear plate (plate part)
25 ... Restriction part 27 ... Board connection piece 30 ... Deflection part 31 ... 1st flexible piece 32 ... 2nd flexible piece 33 ... Slit 36 ... Connection part 37 for earth | ground 37 ... 1st boundary line (1st flexible piece and upper side) Boundary line with face plate)
38 ... 2nd boundary line (boundary line which a 1st flexible piece and a 2nd flexible piece continue)
40 ... Shield case (grounding member)
P ... Circuit board

Claims (5)

It is a form that covers the connector housing, and is made of a metal shell body composed of a plurality of plates,
A board connecting piece formed on the shell body and connected to the circuit board;
Non-contact with the shell body, and a ground connection portion fixed to be conductive to the ground member,
A shield shell, comprising: a bending portion formed so as to be continuous with the shell main body and the ground connection portion and capable of being relatively displaced with respect to the plate portion. The shell body is formed into a box shape by bending a metal plate material of a predetermined shape,
Among the plurality of plate portions, the plate portions arranged so as to be adjacent to each other in a state of being indirectly connected to each other through the other plate portions are restricted in relative displacement by the locking action of the restriction portion. The shield shell according to claim 1. The flexible part is formed by a plurality of flexible pieces that form a flat plate as a whole, are partitioned by slits, and are connected to each other so as to be relatively displaceable from each other.
3. The shield shell according to claim 1, wherein the ground connection portion is formed on any one of the plurality of flexible pieces. The bending portion is composed of a first flexible piece and a second flexible piece defined by the substantially U-shaped slit.
The first flexible piece occupies a region outside the slit and is connected to the plate portion constituting the shell body,
In the second flexible piece occupying the region surrounded by the slit, the ground connection portion is formed,
The boundary line connecting the first flexible piece and the plate portion and the boundary line connecting the first flexible piece and the second flexible piece are parallel to each other and sandwich the ground connection portion. 4. The shield shell according to claim 3, wherein the shield shells are disposed on opposite sides of each other. The bending portion is plate-shaped,
5. The shield shell according to claim 1, wherein the ground connection portion is formed in a through-hole shape by performing a burring process on a part of the bent portion. 6. .

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