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Abstract

A tactile pin display apparatus comprises: tactile pins 20 for braille display; a support housing 30 for supporting and allowing the tactile pins 20 to move forward and backward; cams 40 for raising ends of the tactile pins 20 to a desired height (ON-state) from a tactile surface 35; compression coil springs 10 for biasing the tactile pins 20 against the cams 40; shape memory wires 60 to be heated by current for pivoting the cams 40 forward to bring the tactile pins to the ON-state; and a cam return plate 50 for pivoting the cams backward to lower the tactile pins 20 back to a level (OFF-state) of the tactile surface 35. Even if in the ON-state the tactile pins 20 are strongly pressed by a user, or the current to the shape memory wires 60 is disconnected, the tactile pins 20 are not lowered back because upper surfaces of the cams 40 support lower surfaces of the tactile pins 20. All the tactile pins 20 can be lowered back to the OFF-state by a single reciprocal movement of the cam return plate 50.

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First Claim