Computer system

A computer system is provided. The computer system includes a chassis, a motherboard secured in the chassis, and a mounting bracket. A connector is arranged on the motherboard, and a riser card is inserted in the connector. The mounting bracket is secured to the chassis and located above the motherboard. The computer system further includes a positioning member attached to the riser card. The positioning member has two opposite side plates. One of the side plates is secured to the second riser card, and the other side plate is secured to the mounting bracket.

BACKGROUND

1. Technical Field

The present disclosure relates to computer systems, and particularly, to a computer system capable of mounting different types of expansion cards.

2. Description of Related Art

Generally, a computer system includes a motherboard, a power source and other components mounted within a chassis. The motherboard typically includes a number of connectors or slots in which special purpose printed circuit boards may be inserted. The special purpose printed circuit boards are often referred to as peripheral component interface (PCI) bus cards or expansion cards. These expansion cards may be used to add to or enhance the functionality of the computer system. The inserted card typically extends perpendicularly from the motherboard. However, if the height of the card is greater than the height limitation of the computer system chassis, there will not be enough room to secure the card within the computer system cabinet. In cases like this, it can be desirable to locate the cards parallel to the motherboard, rather than in the typical perpendicular alignment. Generally, the expansion card is perpendicularly coupled to a transfer card, and then the transfer card is perpendicularly inserted in the connectors on the motherboard, so as to locate the expansion card parallel to the motherboard. The computer system includes a mounting bracket secured to the computer system chassis. The transfer card and the expansion card are securely mounted in the computer system cabinet via the mounting bracket. However, a conventional mounting bracket only can fit one type of expansion card. If another type of expansion card with a different configuration is wanted, a different mounting bracket must be used.

DETAILED DESCRIPTION

Referring toFIGS. 1,3and4, an embodiment of a computer system includes a chassis10and a mounting bracket30.

The chassis10includes a bottom wall11, a front wall13, and a chassis sidewall15. The bottom wall11defines two securing holes110. A motherboard20is secured on the bottom wall11adjacent to the front wall13and the chassis sidewall15. A first connector21and a second connector23are disposed on the motherboard20. The first connector21and the second connector23are aligned in a row parallel to the front wall13. The first connector21is located further away from the chassis sidewall15than the second connector23. The first connector21is configured to couple to a first riser card50, and the second connector23is configured to couple to a second riser card. The first riser card50defines two securing holes51. The second riser card60defines two securing holes61. The front wall13defines an opening131and a securing hole133.

The mounting bracket30includes a substantially E-shaped base31, a mounting bracket sidewall33perpendicularly bent from the base31, and a securing plate35adjacent to the base31and the sidewall33. The sidewall33defines an expansion slot331corresponding to the opening131of the chassis front wall13. A blocking tab335perpendicular to the base31and the sidewall33extends from one end of the sidewall33. Two securing posts3351protrude from the blocking tab335. A securing tab37extends down from a bottom edge of the sidewall33. A securing hole371is defined in the securing tab37corresponding to the chassis front wall securing hole133. Two standoffs39extend from one end of the mounting bracket base31opposite to the sidewall33. Each standoff39defines a standoff securing hole391corresponding to the chassis bottom wall securing hole110. The securing plate35defines two securing plate securing holes353corresponding to the first riser card securing holes51and two securing slots355. A mounting slot351is defined in the securing plate35adjacent to the sidewall33. In assembly, the mounting bracket30is capable of being mounted on the chassis10via a plurality of fasteners100,106respectively engaging the corresponding securing holes371,391in the mounting bracket30and the securing holes110and133in the chassis10.

The computer system further comprises a first expansion card70, capable of electronically engaging with the first riser card50, and a second expansion card80, capable of coupling with the second riser card60. A width of the first expansion card70is greater than a width of the second expansion card80. A first fixing piece71is secured to one side of the first expansion card70. The first fixing piece71includes a bent tab711capable of abutting the mounting bracket blocking tab335. A securing means7110, such as a columnar protrusion, is located on the bent tab711corresponding to one of the securing posts3351on the mounting bracket blocking tab335. A first port73is defined in the first expansion card70, and is configured to communicate with a peripheral device101. As shown inFIG. 3, a second fixing piece81is secured to one side of the second expansion card80. The second fixing piece81includes a bent tab811capable of abutting the mounting bracket blocking tab335. A securing means8110, such as a bolt is formed on the bent tab811corresponding to the other securing post3351on the mounting bracket blocking tab335. A second port83is defined in the first expansion card80, and is configured to communicate with a peripheral device101.

The computer system further includes a positioning member90capable of being coupled to the second riser card60. The positioning member90includes a top wall91, a first side plate93and a second side plate95opposite to the first side plate93. Two securing protrusions931are formed on the first side plate93corresponding to the securing slots355in the mounting bracket30. The second side plate95defines two securing slots951corresponding to the second riser card securing slots61. A third plate97adjacent to the first side plate93and the second plate95is bent from one end of the top wall91. A mounting slot973is defined in the third plate97.

When in use, one of the first riser card50, with the first expansion card70, and the second riser card60, with the second expansion card80, is selected to be mounted in the chassis10.

Referring toFIG. 2, when the first riser card50with the first expansion card70is selected for mounting in the chassis10, the first riser card50is perpendicularly inserted in the first connector21on the motherboard20. The first expansion card70is perpendicularly coupled to the first riser card50parallel to the motherboard20. The securing plate35of the mounting bracket30abuts the first riser card50. Two fasteners105extend through the first riser card securing holes51and the mounting bracket securing holes353to secure the first riser card50to the mounting bracket30. One end of the first fixing piece71extends through the mounting slot351in the mounting bracket30. The first fixing piece bent tab711abuts against and is secured to the blocking tab335of the mounting bracket30. The mounting bracket30, together with the first expansion card70and the riser card50, is secured in the chassis10, and the riser card50is engaged in the first connector21of the motherboard20. Thus, the first expansion card70is mounted in the chassis10.

Referring toFIG. 5, when the second riser card60with the second expansion card80is selected for mounting in the chassis10, the second riser card60is perpendicularly inserted in the second connector23on the motherboard20. The second expansion card80is perpendicularly coupled to the second riser card60and parallel to the motherboard20. The first side plate93of the positioning member90abuts against the mounting bracket securing plate35. The securing protrusions931on the positioning member90engage in the securing slots355in the mounting bracket35. Two fasteners105extend through the securing holes951in the second side plate95and the securing holes61in the second riser card60. Thus, the second riser card60is secured to the positioning member90. Then, one end of the second fixing piece80extends through the mounting slot973in the positioning member90. The second fixing piece bent tab811abuts against and is secured to the blocking tab335of the mounting bracket30. The mounting bracket30together with the second expansion card90and the riser card60is secured in the chassis10, and the riser card60is engaged in the second connector23of the motherboard20. Thus, the second expansion card80is mounted in the chassis10. The second expansion card80and the positioning member cooperatively define a width substantially equal to the width of the first expansion card70.

According to the above described disclosure, the mounting bracket30can be used to optionally mount a first type of expansion card or a second type of expansion card which have different measurements into the chassis10.