Stroller with detachable seat member

A stroller, comprising:

• a stroller frame with parallel front and rear horizontal rod members;
• and
• a seat member having a seat portion with a bottom side that is provided with a mounting unit for mounting detachably said seat member on said front and rear rod members, said mounting unit including at least one hook unit for engaging one of said front and rear rod members, and a spring-loaded retaining device for engaging releasably the other one of said front and rear rod members, said retaining device including:
• a housing mounted on said bottom side of said seat portion of said seat member, said housing including a base plate and a surrounding wall which extends upwardly from said base plate and which cooperates with said base plate so as to confine a chamber, said surrounding wall having a front portion formed with a front notch, and a side portion formed with a side notch;
• a retaining block disposed in said chamber, said retaining block having a front portion which extends through said front notch in said surrounding wall and which has an upwardly curving bottom face and a top face formed with a widthwise extending groove for engaging the other one of said front and rear rod members, said retaining block further having a rear portion which is disposed in said chamber and which is formed with a sideward hook projection that extends toward said side notch in said surrounding wall, said hook projection having a first inclined face and a first shoulder on an innermost end of said first inclined face;
• a first spring member disposed in said chamber for biasing said retaining block outwardly of said chamber;
• a press piece disposed in said chamber, said press piece having an operating portion which extends through said side notch in said surrounding wall and an engaging portion which is formed with a second inclined face that abuts against said first inclined face and a second shoulder on an innermost end of said second inclined face for engaging said first shoulder;
• and
• a second spring member disposed in said chamber for biasing said press piece outwardly of said chamber;
• whereby, when installing said seat member on said stroller frame, the other one of said front and rear rod members initially abuts against said bottom face of said front portion of said retaining block so that, when said seat member is pressed downwardly, said retaining block is pushed into said housing against biasing action of said first spring member until the other one of said front and rear rod members has moved past said bottom face so as to be retained within said groove in said top face of said front portion of said retaining block;
• and
• when detaching said seat member from said stroller frame, said press piece is pressed inwardly against biasing action of said second spring member so that said second inclined face moves along said first inclined face to result in movement of said retaining block inwardly of said housing against biasing action of said first spring member and in eventual engagement between said first and second shoulders such that said retaining block ceases to engage the other one of the front and rear rod members.