This patent application is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "The present invention relates in general to the field of information handling system component assembly, and more particularly to an information handling system tool-less daughter card retainer and latch.
"As the value and use of information continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is information handling systems. An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems.
"Information handling systems are generally built from a wide variety of components. Selecting components to include within an information handling system helps end users target the capabilities of the information handling system for planned tasks. Typically, an information handling system has a motherboard that couples to a chassis to support communication between information handling system components. A typical motherboard is a printed circuit board (PCB) that has one or more central processing unit (CPU) sockets to accept one or more CPUs for executing instructions. The CPU sockets interface through the motherboard with memory sockets that hold memory for storing information in support of executing instructions, such as DIMM sockets that hold DRAM modules. The motherboard can interface with a variety of other components, such as an embedded controller, a network interface module, a graphics processor and other types of chipset components supported by the motherboard that perform processing functions. Generally, components interface through the motherboard using standardized communications links, such as a PCI or PCIe bus.
"In some instances, processing functions are performed by components located off the motherboard, such as components supported by daughtercards. Daughtercards are typically a PCB with function-specific components, such as graphics components or network communication components. Daughtercards generally include an interface that provides communication with the motherboard through the motherboard's communications link, such as a PCI or PCIe bus. For example, PCIe slots are coupled to the motherboard and interfaced with the motherboard PCIe bus so that daughterboards couple with the slots to communicate with other components through the motherboard PCIe bus. By distributing functions to daughterboards, an information handling system provides end users with greater flexibility for the selection of components. For example, a graphics subsystem built on a daughterboard will typically provide more effective graphics processing than the graphics components included with a chipset coupled to a motherboard. As another example, a server adjusts to interface with local area networks and/or storage networks by inserting appropriate PCIe interface cards into PCIe motherboard slots for the desired interfaces.
"One difficulty with the use of daughtercards is ensuring that the daughter cards will securely couple to the motherboard with sound electrical interfaces. Secure attachment often involves retainer latches that loosen and tighten to allow insertion and removal of daughtercards. Often such retainer latches are not intuitive or user-friendly so that end users have difficulty interacting with the information handling system to install or remove daughtercards. In some instances, retainer latches interfere with information handling system operations, such as by providing a location through which electromagnetic interference (EMI) can leak."
In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "Therefore a need has arisen for a system and method which securely couples daughtercards to an information handling system.
"In accordance with the present invention, a system and method are provided which substantially reduce the disadvantages and problems associated with previous methods and systems for securing daughtercards to an information handling system. A retainer inserts into a retainer guide at an information handling system chassis so that the retainer secures the daughter cards to the chassis. A latch of the retainer removeably couples the retainer in the inserted position to prevent removal of the daughter cards until the latch is released and the retainer is removed from the retainer guide.
"More specifically, an information handling system processes information with processing components disposed in a chassis, such as a processor that executes instructions, memory that stores the instructions and a motherboard that interfaces the processor and memory. Information is communicated through links of the motherboard, such as a PCIe bus managed by a PCIe controller. Expansion card slots interfaced with the motherboard accept insertion daughter cards that communicate with processing components through the motherboard, such as through PCIe expansion slots interfaced with a PCIe bus. In order to secure the daughter cards to the information handling system chassis, securing elements of the daughter cards engage the chassis and are maintained in position with a retainer. The retainer inserts into a retainer guide proximate the daughter card securing elements to prevent movement of the daughter cards. The retainer inserts into a retainer guide that couples to the housing and is held in place when fully inserted by a latch that engages the chassis. A hinge member couples the retainer to the retainer guide when the retainer is removed from the retainer guide and allows the retainer to rotate to an idle position that is readily accessible by an end user without interfering with end user manipulation of daughter cards for insertion or removal at the chassis.
"The present invention provides a number of important technical advantages. One example of an important technical advantage is that PCIe daughtercards securely couple to an information handling system with a tool-less mechanical solution that enhances EMI shielding. An injection molded plastic part that is inexpensive to manufacture couples PCIe daughtercards to an information handling system with EMI shielding provided by integrated grounding clips. The tool-less design provides scalable coupling of one or more daughtercards to adjust to information handling systems of different dimensions and complexity. An intuitive and simple mechanism to manipulate securing device remains completely coupled to the information handling system whether coupling or decoupling daughtercards so that loose parts do not get lost during daughtercard adjustments. A concise latching motion secures daughtercards in a manner that is easy for an end user to operate without worrying about loose parts.
BRIEF DESCRIPTION OF THE DRAWINGS
"The present invention may be better understood, and its numerous objects, features and advantages made apparent to those skilled in the art by referencing the accompanying drawings. The use of the same reference number throughout the several figures designates a like or similar element.
"FIG. 1 depicts a top perspective view of an information handling system having tool-less daughter card retainer and latch;
"FIG. 2A depicts an interior chassis view of the tool-less daughter card retainer and latch in a secure position;
"FIG. 2B depicts an exterior chassis view of the tool-less daughter card retainer and latch in a secure position;
"FIG. 3A depicts an interior chassis view of the tool-less daughter card retainer and latch in a 50% open position;
"FIG. 3B depicts an exterior chassis view of the tool-less daughter card retainer and latch in a 50% open position;
"FIG. 4A depicts an interior chassis view of the tool-less daughter card retainer and latch in an open position;
"FIG. 4B depicts an interior chassis view of the tool-less daughter card retainer and latch in an open and idle position;
"FIG. 4C depicts an exterior chassis view of the tool-less daughter card retainer and latch in an open and idle position;
"FIG. 5 depicts a top view of an interior chassis portion of the tool-less daughter card retainer and latch removed from the information handling system;
"FIG. 6 depicts a top view of an exterior chassis portion of the tool-less daughter card retainer and latch removed from the information handling system;
"FIG. 7 depicts a top perspective interior view of a daughter card securing element engaged with an information handling system chassis in preparation for securing by the tool-less retainer and latch;
"FIG. 8A depicts a top perspective exterior view of a daughter card coupling to a chassis with the tool-less retainer and latch in the open and idle position;
"FIG. 8B depicts a top perspective exterior view of a daughter card coupling to a chassis with the tool-less retainer and latch rotating into alignment with the retainer guide; and
"FIG. 8C depicts a top perspective exterior view of a daughter card secured by insertion of the tool-less retainer and latch into the retainer guide."
URL and more information on this patent application, see: Wu, Hsien-Chih; Lien, Yao-Chien; Lee, Chih-Hsiang; Chou, Chien-Hung. Information Handling System Tool-Less Daughter Card Retainer and Latch. Filed
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