Antenna module
In an antenna module, a supporting member has an outer wall and an inner wall which form an accommodation groove. A main portion of the coil is accommodated in the accommodation groove of the supporting member at least in part. End portions of the coil are connected to an FP. A lead portion of the FP is laid out to an outside of the supporting member. The supporting member has a first flange portion protruding from the outer wall in a first orientation and a second flange portion protruding from the outer wall in a second orientation. A part of the main portion of the coil is located under each of the first flange portion and the second flange portion when viewed from above. A magnetic sheet is attached to an upper part of the outer wall so that the magnetic sheet covers partly the main portion of the coil.
1 . An antenna module comprising a supporting member, a coil, a flexible printed circuit board and a magnetic sheet, wherein:
the coil has a main portion and end portions;
the end portions are connected to the flexible printed circuit board;
the flexible printed circuit board has a lead portion;
the supporting member has an outer wall and an inner wall which form an accommodation groove and has at least one first flange portion and at least one second flange portion;
the at least one first flange portion protrudes from the outer wall in a first orientation perpendicular to an up-down direction;
the at least one second flange portion protrudes from the outer wall in a second orientation which is opposite to the first orientation;
the main portion of the coil is accommodated in the accommodation groove at least in part;
the lead portion of the flexible printed circuit board is laid out to an outside of the supporting member in part in a third orientation perpendicular to the up-down direction and perpendicular to both the first orientation and the second orientation;
a part of the main portion of the coil is located under each of the first flange portion and the second flange portion when viewed from above; and
the magnetic sheet is attached to an upper part of the outer wall so that the magnetic sheet covers partly the main portion of the coil.
2 . The antenna module as recited in claim 1 , wherein:
the supporting member further has at least one third flange portion protruding from the outer wall in the third direction; and
a part of the main portion of the coil is located under the third flange portion when viewed from above.
3 . The antenna module as recited in claim 1 , wherein:
the supporting member is provided with an opening portion communicating with the accommodation groove;
the opening portion is formed in a lower part of the outer wall; and
the lead portion passes under the coil and passes through the opening portion to be laid out to the outside of the supporting member.
4 . The antenna module as recited in claim 1 , wherein:
the coil is located above the lead portion in part;
the supporting member further has two protrusions protruding from the outer wall in a fourth orientation opposite to the third orientation;
the two protrusions are located at positions which sandwich the lead portion; and
a part of the main portion of the coil is located under each of the two protrusions when viewed from above.
5 . The antenna module as recited in claim 1 , wherein:
the inner wall of the supporting member is provided with a first recess portion and a second recess portion;
the first recess portion and the second recess portion correspond to the first flange portion and the second flange portion, respectively;
the first recess portion is located at a side of the first orientation with respect to the first flange portion corresponding thereto and recessed in the first orientation; and
the second recess portion is located at a side of the second orientation with respect to the second flange portion corresponding thereto and recessed in the second orientation.
6 . The antenna module as recited in claim 1 , wherein:
the supporting member has an upper surface formed with the accommodation groove and a lower surface opposite to the upper surface; and
the lower surface is formed with a plurality of ribs intersecting with one other and hollows each of which is sandwiched by adjacent two of the ribs.
7 . The antenna module as recited in claim 1 , wherein:
the supporting member has an upper surface formed with the accommodation groove and a lower surface opposite to the upper surface; and
the lower surface is formed with a confirmation window which allows visual confirmation that the coil is accommodated in the accommodation groove.
8 . The antenna module as recited in claim 1 , wherein:
the flexible printed circuit board is formed with a plurality of through holes;
the supporting member is formed with a plurality of holding portions corresponding to the through holes; and
each of the holding portions has an inserted portion which is inserted into the through hole corresponding thereto and a fixing portion which is located on the inserted portion and has a size larger than a size of the through hole in a horizontal direction perpendicular to the up-down direction.
9 . The antenna module as recited in claim 1 , wherein:
the first flange portion has a shape which goes down as the shape goes in the first orientation in a cross section defined by the first orientation and the up-down direction; and
the second flange portion has a shape which goes down as the shape goes in the second orientation in a cross section defined by the second orientation and the up-down direction.