Key holder with flexible plunger

A key holder comprising:

• a keyring adapted to hold at least one preselected key;
• a housing including an arcuate passage formed therein, said housing having a notch formed in its outer periphery which is sized to receive the keyring, and a first opening formed therein at one side of the notch which communicates with an end of the passage;
• a plunger having a flexible arm portion, said plunger being disposed within the passage and movable between a position in which the flexible arm portion extends through the opening and across the notch for retaining the keyring to the housing, and a position in which the flexible arm portion is withdrawn into the passage for allowing the removal of the keyring from the housing, said plunger being axially flexing along its longitudinal axis biased to its keyring retaining position, said flexible arm portion flexing to conform to the shape of the arcuate passage when sliding the plunger between its keyring-retaining and withdrawn positions.