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An apparatus for retractably tilting a visor of a door mirror of a motor vehicle between a normal position and a retracted position, including a spring member made of shape-memory alloy, a lever member for setting the spring member at a minimum mounting length and a maximum mounting length when the

An apparatus for retractably tilting a visor of a door mirror of a motor vehicle between a normal position and a retracted position, including a spring member made of shape-memory alloy, a lever member for setting the spring member at a minimum mounting length and a maximum mounting length when the visor is disposed at one of and the other one of the normal position and the retracted position, respectively, and a battery acting as a power source of the apparatus, whereby when the spring member is heated upon its energization, the spring member is contracted from the maximum mounting length to the minimum mounting length based on shape-memory effect of the shape-memory alloy such that the visor is tilted to one of the normal position and the retracted position.

대표청구항 ▼

An apparatus for retractably tilting a visor of a door mirror of a motor vehicle, said door mirror including a stay attached to an outer door panel of said motor vehicle and formed with a rotary shaft portion and a mirror member mounted on said visor, with said visor being formed with a hole and bei

An apparatus for retractably tilting a visor of a door mirror of a motor vehicle, said door mirror including a stay attached to an outer door panel of said motor vehicle and formed with a rotary shaft portion and a mirror member mounted on said visor, with said visor being formed with a hole and being pivotally mounted on said stay through fitting of said rotary shaft portion of said stay into said hole of said visor so as to be pivoted about said rotary shaft portion in forward and rearward directions of said motor vehicle between a normal position where said visor is projected outwardly from said outer door panel in a sidewise direction of said motor vehicle and a retracted position where said visor is retracted towards said outer door panel, said apparatus comprising: a spring means having a first and second element which are made of shape-memory alloy; a lever means for supporting said first element of said spring means at a minimum mounting length when said visor is disposed at the normal position and at a maximum mounting length when said visor is disposed at the retracted position and supporting said second element of said spring means at a maximum mounting length when said visor is disposed at the normal position and at a minimum mounting length when said visor is disposed at the retracted position, said lever means is provided peripherally outwardly from said rotary shaft portion; said spring means being attached, at opposite ends thereof, to said lever means and an inner portion of said visor; and a battery acting as a power source of said apparatus, which is connected to the opposite ends of said spring means, whereby when said spring means is heated upon energization thereof, said spring means is contracted from the maximum mounting length to the minimum mounting length based on shape-memory effect of the shape-memory alloy such that said visor is rotated between the normal and retracted positions.