JP2005268018A - Connector shield structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent EMI (electromagnetic wave interference) without complicating the structure of a shield case 50 and to prevent insulation failure and corrosion due to condensation.
SOLUTION: An FPC connector 10 mounted on a printed wiring board and a shield case 50 covering the outer periphery of the FPC connector 10 are provided, and a grounding reinforcing metal fitting 14 is provided on an outer wall surface of the FPC connector 10. , 16 are formed on the corresponding side plate portions 54, 54 of the shield case 50, and the bulging portions 58, 58 are formed in elastic contact with the reinforcing metal members 14, 16 when engaged with the FPC connector 10. While grounding and shielding, the condensed water on the surface of the shield case 50 is prevented from flowing onto the connection terminals of the contacts 22 to 22 and the connection terminals (for example, connection pads) on the printed wiring board.
[Selection] Figure 1

Description

  The present invention relates to a shield structure for a connector mounted on a printed wiring board.

  In a connector mounted on a printed wiring board, as the signal speed increases, in order to protect peripheral elements including other elements mounted on the printed wiring board from electromagnetic interference (EMI), It is necessary to provide an EMI countermeasure that shields electromagnetic radiation by providing a shield case on the outside.

5 and 6 show a shield structure of a conventional connector. An FPC connector 107 provided with two upper and lower contacts 103 and 105 on a housing 101, and a shield case 109 provided outside the FPC connector 107 are shown. A flexible printed wiring board (hereinafter referred to as FPC) 111 is inserted between the contacts 103 and 105, and the FPC 111 is rotated in the direction of the arrow to engage with the locking portions 113 and 113 of the shield case 109. When combined, the contact portion of the FPC 111 is configured to contact the contact portion of the contacts 103 and 105 (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-189174 (paragraph number “0007”, FIG. 1)

However, the conventional example shown in FIGS. 5 and 6 has a problem that the structure of the shield case 109 is complicated, such as forming the locking portions 113 and 113.
In addition, since the connection terminals of the contacts 103 and 105 protrude outward from the shield case 109, when condensation occurs on the surface of the shield case 109, water droplets attached to the surface of the shield case 109 are connected to the contact terminals of the contacts 103 and 105. And adhere to exposed portions of conductors such as the connection terminals of the contacts 103 and 105 and the connection terminals (for example, connection pads) of the FPC 111, which may cause insulation failure or corrosion.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a connector shield structure that can prevent EMI without complicating the structure of the shield case and prevent problems due to condensation. is there.

  The invention according to claim 1 is a connector shield structure comprising a connector mounted on a printed wiring board and a shield case provided on the outside of the connector, and a grounding conductive material is provided on the outer wall surface of the connector. A member is provided, and the shield case includes a top plate portion that covers a region that is visible from above the connector, and a side plate portion that is provided continuously from the top plate portion downward to be in electrical contact with the conductive member. It is characterized by.

  The invention according to claim 2 is the conductive member according to claim 1, wherein the connector is formed in a substantially rectangular parallelepiped shape, and the conductive member for grounding is provided on the outer wall surface facing the connector, The side plate portion is a side plate portion formed with a bulging portion that elastically contacts the conductive member when engaged with the connector.

  The invention according to claim 3 is the invention according to claim 2, wherein the shield case includes at least one side plate portion located next to the side plate portion in addition to the side plate portion in which the bulging portion is formed, A tongue-shaped contact piece portion that abuts on the outer surface of the side plate portion on which the bulging portion is formed is connected to both side ends of the side plate portion located next to the side plate portion.

  According to a fourth aspect of the present invention, in the second aspect of the invention, the shield case includes a side plate portion that is continuously bent at substantially right angles downward from the four sides of the top plate portion, and one side plate portion that faces the shield case is provided. A bulging portion is formed, and tongue-shaped contact pieces that are in contact with the outer surface of the one side plate portion are connected to both side ends of the other side plate portion facing each other.

  According to a fifth aspect of the present invention, in the second, third, or fourth aspect of the invention, the connector inserts and removes the slider into the housing by rotating the operation lever, and the FPC is connected to the contact side by inserting the slider into the housing. The FPC connector presses the contact portion of the FPC into contact with the contact portion of the contact, and a conductive member is fixed to both side walls of the housing to guide the slider and to rotate the operation lever. It is a reinforcing metal fitting that is supported on the printed circuit board and fixed to the printed wiring board.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, a protrusion for preventing the protrusion is provided on both side wall surfaces of the slider, and a guide hole for guiding the operation lever is formed in the reinforcing bracket by engaging the protrusion. The bulging portion is formed at a position where the bulging portion engages with the guide hole when the engagement with the connector is completed.

  According to the first aspect of the present invention, a shield case is provided outside the connector mounted on the printed wiring board, a grounding conductive member is provided on the outer wall surface of the connector, and the shield case covers a region visible from above the connector. Since the top plate portion and the side plate portion that is in electrical contact with the conductive member are provided, EMI can be prevented and water droplets generated by condensation can adhere to the conductor exposed portions of the printed wiring board and contacts. Can be prevented.

  The invention according to claim 2 is the conductive member according to claim 1, wherein the connector is formed in a substantially rectangular parallelepiped shape, and the conductive member for grounding is provided on the outer wall surface facing the connector. Since the portion is a side plate portion formed with a bulging portion that elastically contacts the conductive member when engaged with the connector, it is possible to prevent EMI without complicating the structure of the shield case and to occur due to condensation. Water droplets can be prevented from adhering to the printed wiring board and the exposed conductors of the contacts.

  The invention according to claim 3 is the invention according to claim 2, wherein the shield case includes at least one side plate portion located next to the side plate portion in addition to the side plate portion in which the bulging portion is formed, Since the contact piece portion provided on both side ends of the side plate portion located next to the side plate portion is in contact with the outer surface of the side plate portion where the bulge portion is formed, the bulge can be formed without complicating the structure of the shield case. The elastic contact force with respect to the conductive member of the part can be reinforced.

  According to a fourth aspect of the present invention, in the second aspect of the invention, the shield case includes a side plate portion that is continuously bent at substantially right angles downward from the four sides of the top plate portion, and one side plate portion that faces the shield case is provided. Since the bulge portion is formed and the contact piece portion provided continuously on both side ends of the opposite side plate portion is in contact with the outer side surface of the one side plate portion, the structure of the shield case is not complicated and the bulge portion is expanded. It is possible to reinforce the elastic contact force of the protruding portion with respect to the conductive member.

  According to a fifth aspect of the present invention, there is provided the FPC according to the second, third or fourth aspect, wherein the connector presses the FPC toward the contact side when the slider is inserted into the housing, thereby bringing the FPC contact portion into contact with the contact contact portion. ZIF (Zero Insertion Force) type because the grounding conductive member is a reinforcing metal fitting that guides the slider and supports the operation lever so that it can rotate, and is fixed to the printed circuit board. With respect to the FPC connector, the reinforcing metal fitting can be used as a conductive member to take measures against EMI and condensation.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, protrusions for retaining are provided on both side wall surfaces of the slider, and the operation lever is guided to the reinforcing metal fitting by engaging with the protrusions for retaining. Since the guide hole is formed and the bulge is engaged with the guide hole when the slider and shield case are completely engaged, a click feeling is generated when the connector and shield case are completely engaged, and the engagement state is stable. Can be held.

  1 to 4 show an embodiment of a shield structure for a connector according to the present invention. In these drawings, 10 is an FPC connector as an example of a connector, and 50 is a shield case.

The FPC connector 10 is an FPC connector (Japanese Patent Laid-Open No. 2003-317838) that has already been proposed by the present applicant. And contacts 22-22.
The housing 12 and the slider 18 are formed of an insulating plastic resin, the reinforcing brackets 14 and 16 are examples of conductive members for grounding and are formed by bending a conductive metal plate, and the operation lever 20 is made of metal (or insulating). The contacts 22 to 22 are formed by punching a conductive metal plate such as a copper alloy having elasticity.

The FPC connector 10 is assembled as follows.
The contacts 22 to 22 are press-fitted and locked to the contact accommodating portion of the housing 12 from the back side, and the reinforcing metal fittings 14 and 16 are press-fitted and locked into the locking grooves 24 and 26 of the housing 12, so that the reinforcing metal fittings 14 and 16 are guided. The slide arm portions 32 and 32 of the slider 18 are inserted into the portions 28 and 30. At this time, the protrusions 34 and 34 for preventing the slide arms 32 and 32 and the protrusions 36 and 36 for click are loosely fitted in the guide holes 38 and 38 of the reinforcing brackets 14 and 16, thereby restricting the movement range of the slider 18. At the same time, the slider 18 is prevented from coming off from the housing 12, and the click feeling when the FPC is connected by the operation of the operation lever 20 is generated.
Next, the rotating arm portions 42 and 42 of the operating lever 20 are inserted into the concave portions 40 and 40 of the slider 18 from the upper side, and the operating lever 20 is assembled. At this time, the pivots 44, 44 of the operation lever 20 are inserted into the pivot holes 46, 46 of the reinforcing metal members 14, 16, so that the operation lever 20 can rotate around the pivots 44, 44.

As shown in FIGS. 3 and 4, the FPC connector 10 assembled as described above is placed at a predetermined position on the printed wiring board 70, and the connection terminals 48 to 48 of the contacts 22 to 22 are printed wiring. The connection terminals (for example, connection pads) on the substrate 70 are soldered, and the reinforcing metal members 14 and 16 are soldered to the ground terminals on the printed wiring board 70 and mounted on the printed wiring board 70.
Next, the operating lever 20 is rotated by approximately 90 ° from the initial state shown in FIG. 1 to move the slider 18 to the insertion port side of the FPC 80, the FPC 80 is inserted with a low insertion force, and the operating lever 20 is rotated by approximately 90 °. Then, by returning the operation lever 20 and the slider 18 to the initial state of FIG. 1, the slider 18 presses the FPC 80 toward the contacts 22 to 22, and the contact portion of the FPC 80 is brought into elastic contact with the contact portion of the contacts 22 to 22. Connect electrically.

The shield case 50 is formed in a substantially box shape having an open bottom surface by punching, bending, or the like of a conductive metal plate such as an elastic copper alloy.
Specifically, the shield case 50 is formed in a substantially rectangular shape and covers a top plate portion 52 that covers a region that can be seen from above the FPC connector 10, and is bent at a substantially right angle downward from the four sides of the top plate portion 52. A substantially rectangular side plate portion 54, 54, 56, 56, and the inner side of the side plate portion 54, 54 facing one of the side plate portions 54, 54, 56, 56. Bulging portions 58, 58 that bulge to the opposite side plate portions 56, 56 are bent at substantially right angles to the opposite end portions of the other side plate portions 56, 56 and come into contact with the outer side surfaces of the one side plate portions 54, 54. Contact pieces 60, 60, 60, 60 are provided continuously.

The shield case 50 formed as described above is engaged with the outside of the FPC connector 10 so as to cover the outer periphery of the FPC connector 10 mounted on the printed wiring board 70.
Specifically, as shown in FIGS. 3 and 4, the bulging portions 58 and 58 formed in the one side plate portions 54 and 54 are engaged with the guide holes 38 and 38 of the reinforcing brackets 14 and 16. The bulging portions 58 and 58 are in elastic contact with the reinforcing metal fittings 14 and 16, and one side plate portion 56 of the other side plate portions 56 and 56 covers the outer wall surface on the FPC 80 insertion side of the FPC connector 10. The side plate portion 56 is disposed outside the connection terminals 48 to 48 of the contacts 22 to 22 of the FPC connector 10.
Since the engagement of the bulging portions 58, 58 with the guide holes 38, 38 completes the engagement of the shield case 50 with the FPC connector 10, a click feeling is generated and a stable engagement state can be maintained.
Due to the elastic contact of the bulging portions 58, 58 with the reinforcing brackets 14, 16, the shield case 50 covering the outer periphery of the FPC connector 10 intervenes the reinforcing brackets 14, 16 to electrically connect the ground line on the printed wiring board 70. Therefore, EMI can be prevented.
Further, since the top plate portion 52 of the shield case 50 covers an area visible from above the FPC connector 10 and the side plate portion 56 is disposed outside the connection terminals 48 to 48 of the contacts 22 to 22, It is possible to prevent water droplets generated by condensation on the surface from adhering to the connection terminals 48 to 48 of the contacts 22 to 22 and the connection terminals (for example, connection pads) on the printed wiring board 70, resulting in insulation failure and corrosion. Can be prevented.

In the above-described embodiment, the bulging portions 58 and 58 are formed substantially in the middle of the side plate portions 54 and 54, and both the side plate portions 54 and 54 are formed in substantially the same shape, and either one of the side plate portions 54 and 54 ( Although 54) is on the insertion side of the FPC 80, the shield case 50 can be engaged with the FPC connector 10 to facilitate assembly, but the present invention is not limited to this.
For example, when the bulging portions 58, 58 are formed at positions other than the middle of the side plate portions 54, 54 and engaged with the guide holes 38, 38 of the reinforcing metal fittings 14, 16, The height of one side (the side plate portion 54 on the connection terminals 48 to 48 side of the contacts 22 to 22) is made longer than the other height as shown by a one-dot chain line in FIG. 3 so as to improve EMI countermeasures and dew condensation countermeasures. It can also be used for cases where

In the above-described embodiment, the guide holes 38 and 38 that engage with the protrusions 34 and 34 for preventing the removal are formed in the reinforcing metal members 14 and 16 of the FPC connector 10, and the engagement of the shield case 50 with the FPC connector 10 is completed. The bulging portions 58 and 58 are sometimes engaged with the guide holes 38 and 38 to cause a click feeling and maintain a stable engagement state. However, the present invention is not limited to this, and the bulging portion It suffices if 58 and 58 are elastically in contact with the reinforcing metal fittings 14 and 16.
For example, even if the guide holes 38, 38 are formed in the reinforcing metal members 14, 16 of the FPC connector 10, the bulging portions 58, 58 are formed in the guide holes 38, 58 when the shield case 50 is completely engaged with the FPC connector 10. It can also be used for the case where it is formed at a position where it is not engaged with 38.

  In the above embodiment, the case where the connector is the ZIF type FPC connector 10 and the grounding conductive members are the reinforcing metal fittings 14 and 16 has been described. However, the present invention is not limited to this, and the connector is not a ZIF type FPC. It can also be used in the case of a connector for a connector or a connector that is not for FPC and the conductive member for grounding is not the reinforcing metal fittings 14 and 16.

In the embodiment, the shield case 50 includes the top plate portion 52 and the side plate portions 54, 54, 56, 56, and the contact piece portions 60, 60, 60, 60 are connected to both ends of the side plate portions 56, 56. The case where the elastic contact force of the bulging portions 58 and 58 with respect to the reinforcing brackets 14 and 16 is reinforced without complicating the structure of the shield case 50 has been described. However, the present invention is not limited to this, and the contact piece portion It is also possible to use a case in which all or part of 60, 60, 60, 60 is omitted.
For example, the shield case 50 includes one side plate portion 56 located next to the side plate portions 54, 54 in addition to the side plate portions 54, 54 in which the bulging portions 58, 58 are formed. It can also be used in the case where contact piece portions 60, 60 for reinforcing the elastic contact force are provided at both ends of each.

In the above embodiment, the connector is formed in a substantially rectangular parallelepiped shape, the grounding conductive member is provided on the opposing outer wall surface of the connector, and the side plate portion of the shield case elastically contacts the conductive member when engaged with the connector. Although the case of the side plate portion where the protruding portion is formed has been described, the present invention is not limited to this, and includes a connector mounted on a printed wiring board and a shield case provided on the outside of the connector, A conductive member for grounding is provided on the outer wall surface of the connector, and the shield plate covers the area visible from above the connector, and the side plate that is continuously provided downward from the top plate to make electrical contact with the conductive member. It can utilize about the shield structure of the connector which comprised the part.
For example, a conductive member for grounding is provided on two outer wall surfaces or one outer wall surface facing the connector, and two side plate portions or one side plate portion facing the conductive member for grounding are connected to the top plate portion, When engaging recesses and locking projections are formed that engage and make electrical contact with one and the other of the conductive member and the side plate portion, or engage with and electrically engage with one and the other of the conductive member and the side plate portion. It is also possible to use the case where the engaging window and the locking claw that are in contact with each other are formed.

1 shows an embodiment of a shield structure for a connector according to the present invention, and is an exploded perspective view with some illustrations omitted. FIG. FIG. 2 is an exploded perspective view showing the FPC connector 10 in FIG. 1, with some illustrations omitted. FIG. 2 is a cross-sectional view showing a vertical cross section parallel to the lateral direction in a state in which the shield case 50 is engaged with the FPC connector 10 in FIG. 1. FIG. 2 is a partial side view of the shield case 50 in a state in which the shield case 50 is completely engaged with the FPC connector 10 in which a part of the side surface parallel to the longitudinal direction is cut away and shown in cross section. It is a perspective view which shows a prior art example. FIG. 6 is a cross-sectional view taken along line AA in a state where the FPC 111 is inserted in FIG. 5.

Explanation of symbols

10. FPC connector (an example of a connector)
12 ... Housing
14, 16 ... Reinforcing metal fitting (an example of a conductive member for grounding)
18 ... Slider 20 ... Control lever 22 ... Contact
34 ... Protrusion for retaining 36 ... Protrusion for clicking 38 ... Guide hole 48 ... Connection terminal of contact 22 50 ... Shield case
52 ... Top plate part 54, 56 ... Side plate part 58 ... Swelling part
60 ... contact piece 70 ... printed wiring board 80 ... FPC (flexible printed wiring board)

Claims (6)

  A connector (10) mounted on a printed wiring board; and a shield case (50) provided outside the connector (10); and a conductive member for grounding provided on the outer wall surface of the connector (10); A shield plate (50) covers a region visible from above the connector (10), and a side plate that is continuously provided downward from the top plate (52) and is in electrical contact with the conductive member. And a shield structure for the connector.   The connector (10) is formed in a substantially rectangular parallelepiped shape, and the conductive member for grounding is the conductive member (14) (16) provided on the opposing outer wall surface of the connector (10), and the side plate portion of the shield case (50) Is a side plate portion (54) (54) formed with a bulging portion (58) (58) elastically contacting the conductive members (14) (16) when engaged with the connector (10). The shield structure for a connector according to claim 1.   The shield case (50) includes, in addition to the side plate portions (54) and (54), at least one side plate portion (56) positioned next to the side plate portions (54) and (54), and this side plate portion (56). 3. A shield structure for a connector according to claim 2, wherein tongue-shaped contact portions (60) (60) contacting the outer side surfaces of the side plate portions (54) (54) are connected to both side ends of the connector. .   The shield case (50) is provided with side plate portions (54) (54) (56) (56) which are continuously bent at substantially right angles downward from the four sides of the top plate portion (52), and one of the opposing side plates The bulging portions (58) and (58) are formed in the portions (54) and (54), and the outer sides of the one side plate portions (54) and (54) are formed on both side ends of the opposite side plate portions (56) and (56). 3. The connector shield structure according to claim 2, wherein tongue-shaped contact portions (60), (60), (60), and (60) that are in contact with the side surfaces are continuously provided.   The connector (10) inserts and removes the slider (18) into and from the housing (12) by rotating the operating lever (20), and the flexible printed wiring board (80) by inserting the slider (18) into the housing (12). An FPC connector that presses against the contact (22-22) side to bring the contact portion of the flexible printed circuit board (80) into contact with the contact portion of the contact (22-22), and the conductive members (14), (16) It is a reinforcing bracket that is fixed to both side walls of the housing (12), guides the slider (18), rotatably supports the operation lever (20), and is fixed to the printed wiring board (70). 5. The shield structure for a connector according to claim 2, 3 or 4. Protrusion projections (34) and (34) are provided on both side walls of the slider (18), and guide holes for guiding the operation lever (20) by engaging the projections (34) and (34) on the reinforcing bracket. (38) and (38) are formed, and the bulging portions (58) and (58) are formed at positions to engage with the guide holes (38) and (38) when the engagement with the connector (10) is completed. The connector shield structure according to claim 5.

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