Abstract: A needle threading device is disclosed which comprises a first mechanism having a hole for receiving a needle and a slit for receiving a thread, a second mechanism having a threader pin and pivotally supported by the first mechanism so as to be pivotable between a first position and a second position different from the first position, the threader pin enabling the thread to pass through an eye of the needle when the second mechanism is pivoted to the second position from the first position, a first biasing member urging the second mechanism to the first position, an operating member causing the second mechanism to be pivoted to the second position against an action of the first biasing member, and a second biasing member urging the operating member and the second mechanism in a direction in which they are spaced away from each other.

Abstract: A needle thread passing device is capable of being constructed in a small size for easy storage. A needle receiving member 34 has a needle insertion hole 34c and a thread insertion slit 34e forming an angle with the needle insertion hole 34c. A needle threader member 42 is movable between positions away from and close to the needle receiving member 34 and has a needle threader pin 48b that can push a thread inserted through the thread insertion slit 34e into a needle eye 52a of a needle 52 inserted into the needle insertion hole 34c when the needle threader member 42 moves from the position away from the needle receiving member 34 to position close thereto. A cover 32 can move with respect to a main body 30 containing the needle receiving member 34. The needle threader member 42 is constantly biased toward the position away from the needle receiving member 34.

Abstract: A needle threading device is disclosed which comprises a first mechanism having a hole for receiving a needle and a slit for receiving a thread, a second mechanism having a threader pin and pivotally supported by the first mechanism so as to be pivotable between a first position and a second position different from the first position, the threader pin enabling the thread to pass through an eye of the needle when the second mechanism is pivoted to the second position from the first position, a first biasing member urging the second mechanism to the first position, an operating member causing the second mechanism to be pivoted to the second position against an action of the first biasing member, and a second biasing member urging the operating member and the second mechanism in a direction in which they are spaced away from each other.