Memory card casing having longitudinally formed ridges and radially formed ribs for support of contacts of a PCB

Abstract

A memory card casing is composed of a top cover having multiple through holes defined in a peripheral edge of the top cover, and a bottom cover, wherein the bottom cover has multiple longitudinal ridges formed on a peripheral edge of the bottom cover, a first rib formed on the bottom cover to connect to one end of each of the longitudinal ridges and a second rib formed on the bottom cover to connect to the other end of each of the longitudinal ridges so that after a printed circuit board is inserted into a receiving space between the bottom cover and the top cover, contacts on the printed circuit board are exposed via the through holes of the top cover and fully supported by the longitudinal ridges.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a memory card casing, and more particularly to memory card casing having ridges and ribs formed on a bottom cover of the casing so as to provide sufficient force to support thereon contacts of a printed circuit board. [0003] 2. Description of Related Art [0004] Digital cameras and other electronic devices such as cell phones depend on memory cards to store valuable information. According to their information storing capabilities, memory cards for storing large quantity of information may be divided into an SD (secure digital) card and an XD (extreme digital) card. However, because the thickness of the printed circuit board (PCB) of the memory card is reduced to less than 0.3 mm and respective thickness for the top cover and the bottom cover of the casing for receiving therein the PCB is less than 0.2 mm, the rigidness of the memory card is not sufficient. That is, the memory card is ...

AI Technical Summary

Benefits of technology

[0007] The primary objective of the present invention is to provide an improved memory card casing to provide sufficient support for PCB contacts such that chance of damage to the PCB contacts is reduced.

[0008] In order to accomplish the aforementioned objective, the memory card casing is composed of a top cover and a bottom cover. The bottom cover has multiple longitudinally formed ridges and radially formed ribs on a face of the bottom cover so that after the printed circuit board is inserted between the bottom cover and the top cover, the contacts are entirely supported by the ridges and ribs and therefore damage to the PCB contacts when the memory card is inserted into the electronic device is avoided.

Problems solved by technology

However, because the thickness of the printed circuit board (PCB) of the memory card is reduced to less than 0.3 mm and respective thickness for the top cover and the bottom cover of the casing for receiving therein the PCB is less than 0.2 mm, the rigidness of the memory card is not sufficient.

That is, the memory card is easily distorted and damaged especially when inserted into the receiving port of an electronic device.

Under the situation that there is no sufficient support to the contacts, the contacts are easily damaged when engaging with the legs of the electronic device.

Because the support from the columns (21) and ears (22) can only provide little support rigidness to the PCB contacts, the contacts are still easily damaged and distorted when inserted into the receiving port of an electronic device.

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