Attachment member and system
The disclosure relates to an attachment member ( 1 ) for interconnection of a first board ( 51 ) and a second board ( 52 ), wherein at least one of the boards ( 51, 52 ) is a circuitry board, the attachment member ( 1 ) comprising a base portion ( 30 ) extending along a base plane ( 31 ), a first pair of legs ( 11, 12 ) extending from the base portion ( 30 ) in a first direction (D 1 ) adapted to between them receive a portion of a first board ( 51 ), a second pair of legs ( 21, 22 ) extending from the base portion ( 30 ) in a second direction (D 2 ) adapted to between them receive a portion of a second board ( 52 ), and a pair of abutment protrusions ( 41, 42 ), each abutment protrusion ( 41, 42 ) extending along said base plane ( 31 ) from the base portion ( 30 ) or from the first or second legs ( 11, 12, 21, 22 ) to form an abutment surface ( 41 a, 42 a ) positioned outside respective leg of the second pair of legs ( 21, 22 ) and facing in the second direction (D 2 ). The disclosure also relates to a system comprising an attachment member ( 1 ), a first board ( 51 ) and a second board ( 52 ).
1. Attachment member for interconnection of a first board and a second board, wherein at least one of the boards is a circuitry board, the attachment member comprising:
a base portion extending along a base plane,
a first pair of legs extending from the base portion in a first direction (D 1 ), wherein the first pair of legs are configured to resiliently flex along a respective flexing direction (DF 11 , DF 12 ) away from each other thereby allowing a portion of a first board to be inserted between and to lockingly engage the first legs, and to thereby define a center region of the attachment member situated between the first pair of lees,
a second pair of legs extending from the base portion in a second direction (D 2 ), the second direction (D 2 ) being opposite the first direction (D 1 ), wherein the second pair of legs are configured to resiliently flex along a respective flexing direction (DF 21 , DF 22 ) away from each other thereby allowing a portion of a second board to be inserted between and to lockingly engage the second legs,
a pair of abutment protrusions, each abutment protrusion extending along said base plane from the base portion or from the first or second legs to form an abutment surface external to the center region and with the abutment surface being configured to abut directly or indirectly the second board on a first surface of the second board, the first surface of the second board facing the base portion of the attachment member, and
wherein each leg of the first pair of legs is provided with an outer shoulder portion external to the center region and forming a shoulder surface facing in the second direction (D 2 ).
2. Attachment member according to claim 1 , wherein the first pair of legs are positioned at a first distance (D 1112 ) from each other and the second pair of legs are positioned at a second distance (D 2122 ) from each other, wherein the first distance (D 1112 ) is greater than the second distance (D 2122 ).
3. Attachment member according to claim 1 , wherein each leg of the first pair of legs is provided with an inner shoulder portion forming a shoulder surface facing in the first direction (D 1 ) and positioned at a distance (D 3111 b , D 3112 b ) from the base portion and at a distance (D 41 a 11 b , D 42 a 12 b ) from the abutment surfaces as seen along the first direction (D 1 ).
4. Attachment member according to claim 1 , wherein the abutment protrusions are connected to the base portion or the first or second legs at a junction provided at a distance (D 41 , D 42 ) from the abutment surfaces as seen in the first direction (D 1 ), wherein the abutment protrusions have an extension from said junction along the base plane and also along the second direction (D 2 ) thereby forming a gap (D 41 ′, D 42 ′) between the abutment surface and respective leg of the second pair of legs as seen along the base plane.
5. Attachment member according to claim 1 , wherein the abutment protrusions extend along the second direction (D 2 ) such that the abutment surfaces are positioned at a distance (D 41 , D 42 ) from the base portion as seen along the second direction (D 2 ).
6. Attachment member according to claim 1 , wherein the abutment protrusions extend outwardly from the base portion.
7. Attachment member according to claim 1 , wherein the body portion, the first and second pairs of legs and the abutment protrusions are integrally formed in a polymeric material.
8. Attachment member according to claim 1 , wherein the abutment surfaces have an extension (W 41 , W 42 ) in a transverse direction (T) being greater than the extension (W 21 , W 22 ) of the second legs in the transverse direction (T), the transverse direction (T) being transverse to a longitudinal direction (L), extending in the base plane between the legs of the second pair of legs, and extending along said base plane.
9. Attachment member according to claim 1 , wherein each of the legs of the first and second pair of legs are provided with a retaining bulge facing the other leg of respective pair of legs.
10. System comprising:
an attachment member according to claim 1 ,
a first board retained between the first pair of legs, and
a second board retained between the second pair of legs.
11. System according to claim 10 , wherein the first board is a driver PCB and the second board is an LED PCB.
12. System according to claim 10 , wherein the legs of the second pair of legs extend through through-going openings in the second board.
13. System according to claim 10 , wherein an insulation layer is provided on the first surface of the second board facing the first board and being in contact with the abutment surfaces of the abutment protrusions.