Right angled blind mate interconnection
A circuit board connection system is provided having a first circuit board having a first connector and a second circuit board having a second connector for mating with the first connector. A chassis is provided for mounting the first circuit board and the second circuit board, and when assembled, the first circuit board and the second circuit board lie parallel to a mounting surface of the chassis. At least one first alignment feature is fixed to or integrated into the first circuit board and at least one complementary alignment feature is fixed to or integrated into the second circuit board or the mounting surface of the chassis. An interaction between the first alignment feature and the complementary alignment feature forces alignment of the first connector with the second connector as the first circuit board is moved towards the second circuit board along the mounting surface of the chassis.
1 . A circuit board connection system comprising:
a first circuit board having a first connector;
a second circuit board having a second connector for mating with the first connector;
a chassis for mounting the first circuit board and the second circuit board, wherein, when assembled, the first circuit board and the second circuit board lie parallel to a mounting surface of the chassis;
at least one first alignment feature fixed to or integrated into the first circuit board; and
at least one complementary alignment feature fixed to or integrated into the second circuit board or the mounting surface of the chassis,
wherein an interaction between the first alignment feature and the complementary alignment feature forces alignment of the first connector with the second connector as the first circuit board is moved towards the second circuit board along the mounting surface of the chassis,
wherein the at least one complementary alignment feature is an alignment pin fixed to the mounting surface and extending perpendicular to the mounting surface,
wherein the alignment pin has a head comprising a lower surface, and
wherein the lower surface of the head of the alignment pin is tapered.
2 . The circuit board connection system of claim 1 wherein one of the first and second connectors is a female connector and the other of the first and second connectors is a male connector, and wherein the at least one alignment feature, upon engagement with the at least one complementary alignment feature, allows only linear motion along a plane of the chassis in a direction of connection pins of the male connector.
3 . The circuit board connection system of claim 2 wherein the at least one alignment feature is a notch in a first edge of the first circuit board aligned with sockets of the female connector.
4 . The circuit board connection system of claim 3 wherein the second circuit board is located on the chassis adjacent the alignment pin.
5 . The circuit board connection system of claim 4 wherein the second circuit board is fixed to the chassis prior to an introduction of the first circuit board.
6 . The circuit board connection system of claim 4 wherein the alignment pin has a head having a width larger than a width of the notch and a shaft extending from the mounting surface to the head longer than a thickness of the first circuit board.
7 . The circuit board connection system of claim 3 wherein the mounting surface of the chassis has a wall extending perpendicular from the mounting surface, and wherein the first circuit board has a length in the direction of the sockets of the female connector, and wherein a distance from the alignment pin to the wall is less than the length of the first circuit board.
8 . The circuit board connection system of claim 6 wherein an angle of the taper defines a maximum allowable approach angle of the first circuit board relative to the mounting surface during alignment.
9 . The circuit board connection system of claim 8 wherein the taper of the lower surface of the head of the alignment pin has at least a first segment having first angle relative to the mounting surface at a first radial distance from the shaft and a second segment having a second angle relative to the mounting surface at a second radial distance from the shaft, the second angle being smaller than the first angle, such that the maximum allowable approach angle is reduced as the first edge approaches a plane parallel to the first edge defined by the shaft.
10 . The circuit board connection system of claim 8 wherein the length of the shaft is substantially similar to the thickness of the first circuit board with an added tolerance, such that after the first edge passes the plane defined by the shaft, the first circuit board can be translated further towards the second circuit board only if flat on the mounting surface.
11 . The circuit board connection system of claim 10 wherein a distance between the second circuit board and the shaft of the alignment pin is larger than a length of the connection pins of the male connector.
12 . The circuit board connection system of claim 1 wherein the at least one alignment feature is two parallel notches in the first circuit board adjacent opposite ends of the female connector and aligned with sockets of the female connector, and wherein the second circuit board is fixed on the chassis and the at least one complementary alignment feature is two alignment pins fixed to the mounting surface and extending perpendicular to the mounting surface adjacent opposite ends of the male connector.
13 . The circuit board connection system of claim 12 wherein each of the two alignment pins has a head having a width larger than a width of the notch and a shaft extending from the mounting surface to the head larger than a thickness of the first circuit board, and wherein a lower surface of the head of each alignment pin is tapered, an angle of the taper defining a maximum allowable approach angle of the first circuit board relative to the mounting surface during alignment.
14 . The circuit board connection system of claim 1 wherein the chassis provides cooling features opposite the mounting surface.
15 . The circuit board connection system of claim 1 wherein the mounting surface comprises a detent adjacent a mounting location of the second circuit board, such that the second connector is spaced apart from the mounting surface.
16 . The circuit board connection system of claim 1 wherein the first connector and the second connector are high-speed right-angle connectors.
17 . The circuit board connection system of claim 1 wherein the first connector and the second connector are data connectors.