Structure for preventing incorrect insertion of an interface module

[0001] 1. Field of the Invention

[0002] The present invention relates to a foolproof structure for an interface module, and more particularly to a foolproof structure that prevents a PCI Express (PCI-E) interface from being connected incorrectly and assures the PCI-E interface to be connected to a correction position.

[0003] 2. Description of the Related Art

[0004] PCI Express (PCI-E) was originally developed by Intel and is considered as a new wideband I/O interface that can replace the PCI. The most significant improvement made by the PCI Express resides on its node-to-node topology that allows inverters to share the resources (such as the bus bandwidth) for the connected PCI Express devices according to their priorities. Each of the devices can be accessed or connected to the inverter directly and independently. Further, the inverter processes the transmitted data in the first priority, so that instant application programs can access the inverters immediately.

[0005] Another improvement over the PCI resides on the higher bandwidth of the PCI Express. A single channel can transmit 250 MB of data per second in a one-way transmission (and 500 MB per second for the two-way transmission), and the present PCI Express provides five formats (x1, x2, x3, x4 and x16) for the use of different bandwidths. The PCI Express (x2) comprises two channels, and the maximum one-way and two-way bandwidths are 500 MB per second and 1000 MB per second respectively.

[0006] Due to the compatibility issue of the PCI-E specification and electronic signals, the left and right sides of the modules are not compatible, and thus the I/O modules cannot be drawn out if they are installed improperly. Therefore, users have to remember which side of the module should be inserted before electronic signals can be connected properly. Further, a module cannot be inserted into the insert slot of a motherboard with a different specification. For instance, a module with a PCI-E (x4) specification should not be inserted into a motherboard with a PCI-E (x8) specification, or else the PCI-E specification and electronic signals will be incompatible, and improper operations or damages to the I/O module may result.

[0007] In view of the shortcomings of the prior art, the inventor of the invention based on years of experience in the related industry to conduct extensive researches and experiments, and finally developed a foolproof structure for an interface module in accordance with the present invention.

[0008] Therefore, it is a primary objective of the present invention to provide a feasible solution and overcome the foregoing problems by providing a foolproof structure for an interface module. The foolproof structure is installed in casing, and a motherboard is installed in the casing. The casing includes two or more fixing frames disposed proximate to the motherboard, and another end of the fixing frame is fixed onto a distal surface of the casing. A module stand is installed in each fixing frame, and the module stand has a first foolproof module disposed on the fixing frame and proximate to a corresponding distal edge of the motherboard. The position of the first foolproof module can be changed according to the installation direction of the module stand. Further, the module stands installs different modules of interface cards, and these interface cards can convert different PCI-E telecommunication signals into different communication signals. Further, the motherboard includes a second foolproof module disposed at a distal edge connected to the insert slot and a distal edge of the module stand. The position of the second foolproof module can be changed according to the specification of the insert slot. In an installation, the first foolproof module is used to insert the module stand correctly into the fixing frame, and then the second foolproof module is used to insert the interface card of the fixing frame correctly into the insert slot of the motherboard, so as to prevent the module stand from being installed to a wrong position, and thus a different module stand will not be installed to a wrong fixing frame. Further, the invention prevents the interface card from being inserted into a wrong insert slot, so as to avoid the incapability of sending different electronic signals or an error of sending wrong messages, and also protects the foregoing modules from being damaged.

[0009] Another objective of the present invention is to provide a foolproof structure for an interface module, wherein the interface card installs a port disposed at an end away from the motherboard for connecting an external device. Further the module stand includes an opening for accommodating the port, so that the port can be exposed from the surface of the casing.

[0017] Referring to FIGS. 1, 2 and 3 for a foolproof structure for an interface module of the present invention, the foolproof structure is installed in a casing 10 which is a rectangular computer casing. The casing 10 installs a motherboard 20, and the motherboard 20 has at least one insert slot 21 disposed at an edge of the motherboard 20, and the insert slots 21 are compatible with the PCI-E specification.

[0018] Further, the casing 10 includes two or more adjacent fixing frames 11 disposed proximate to the motherboard 20, and the fixing frame 11 in this embodiment is an inverted U-shape frame. Another end of the fixing frame 11 is fixed onto a distal surface of the casing 10, and the fixing frame 11 includes a module stand 30. A first foolproof module 40 is disposed at the module stands 30 and the fixing frames 11 and proximate to the corresponding distal edge of the motherboard 20, and the first foolproof module 40 in this embodiment is comprised of a rectangular indent and a rectangular protrusion. The position of the first foolproof module 40 can be changed according to the installation direction of the module stand 30. In this embodiment, the first foolproof module 40 is divided into a left module and a right module, wherein the left module is installed to the right side of the first foolproof module 40 and the right module is installed to the left side of the first foolproof module 40. The module stand 30 include a sideboard 31 disposed at another end away from the motherboard 20. The sideboard 31 includes a screw rod 32 secured onto a distal surface of the casing 10, such that the module stand 30 is fixed into the casing 10, and the sideboard 31 includes an opening 33.

[0019] Further, different modules interface cards 50 are installed to the module stands 30 and these interface cards 50 can convert different PCI-E telecommunication signals into different communication signals (such as USB, IEEE1394, and SATA signal, and an interface 51 (which is a goldfinger in this embodiment) is installed between the interface card 50 and the corresponding edge of the motherboard 20, and the interface 51 can be inserted precisely into the insert slot 21. Further, the motherboard 20 installs a second foolproof module 60 at an edge of the insert slot 21 and an edge of the module stand 30, and the second foolproof module 60 of this embodiment is comprised of a plate with a circular arc protrusion, and a circular arc indent (as shown in FIG. 3). The position of the second foolproof module 60 can be changed according to the specification of the insert slot 21. In this embodiment, a different interface card 50 is installed separately on a left side and a right side, and a port 52 is provided on the interface card 50 and disposed at an end away from the motherboard 20 for connecting an external device. The port 52 can be passed through the opening 33 and exposed from the surface of the casing 10.

[0020] Referring to FIGS. 2, 3, 3A and 3B for the installation, a first foolproof module 40 is used to insert different module stands 30 correctly into the fixing frame 11 (as shown in FIG. 3A), and the second foolproof module 60 is used to insert the interface 51 of the interface card 50 in the fixing frame 11 correctly into the insert slot 21 of the motherboard 20 (as shown in FIG. 3B). Therefore, the invention can prevent the module stand 30 from being inserted into a wrong position, so that a different module stand 30 will be inserted into a wrong fixing frame 11. The invention also prevents the interface card 50 from being inserted into a wrong insert slot 21 (as shown in FIG. 4), so as to avoid the incapability of sending different electronic signals or an error of sending wrong messages, and also protects the foregoing modules from being damaged.

[0021] In view of the foregoing preferred embodiments, the design in accordance with the present invention can improve the efficient of the interface and overcome the shortcomings of the prior art. In summation of the description above, the object, shape, structure of the present invention are novel and improve over the prior art and thus is duly submitted for the patent application. While the invention has been described by means of specific embodiments, modifications and variations could be made by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.