Write protect switch for card connectors

Abstract

A write protect switch (SW) which comprises a first metal piece (50) in the form of a fixed metal piece, and a second metal piece (40) having an abutting portion (46) for abutting against a recess (2) conesponding to one slide region of a write protect button (3), the abutting portion being positioned substantially at the middle between a contact (45) and a holder (42) or positioned at a location shifted toward the holder (42) from this middle position, wherein it is ensured that both metal pieces (40, 50) reliably and stably move toward and away from each other and contact each other under required pressure, so that the position of the write protect button is accurately and reliably detected.

Description

technical field [0001] The present invention relates to the card connector that is installed in the electronic equipment such as mobile phone, telephone, PDA (personal digital assistance / special purpose digital auxiliary equipment), portable gramophone, digital camera, more specifically, it is about detecting the writing of IC card Write-protect switch at the position of the protect key. Background technique [0002] In electronic devices such as mobile phones, telephones, PDAs, and digital cameras, SIM (subscriber identity module) cards, MMC (multimedia cards), sensitive media (スマ-ブメデイア, trademarks) with built-in IC cards ), SD card (secure digital, super density), etc. are equipped with IC cards, and various function expansions and user customizations have been carried out. [0003] In this kind of IC card, in order to protect the information stored in the internal memory, it is common to take some measures to prohibit writing. Of course, when the user of the card needs ...

AI Technical Summary

Problems solved by technology

[0009] In this switch configuration, the displacement of the contact reed 100 basically depends on the height (thickness) of the button 102; The above error becomes the actual displacement of the contact reed 100, most of which cannot ensure sufficient displacement for detection

[0010] In addition, in the above-mentioned prior art, one side of the elastic displacement contact spring 100, due to the length D from the fixed part 100b for cantilever-shaped support and fixation to the abutting part 100c abutting on the write-protect key 102, and the length D from the The difference between the length E of the fixed part 100b and the contact part 100a is very small, therefore, the displacement greater than the displacement of the contact part 100c cannot be obtained at the contact part 100a; plus the above-mentioned error fluctuation and assembly tolerance, etc. , cannot ensure the necessary contact pressure to obtain electrical contact, and in the worst case, cannot detect the write-protect key position correctly and stably

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