A folding device for connecting legs of a highchair includes first and second folding members, a toothed wheel, and an actuator. The first folding member is formed with a positioning groove, and the second folding member is formed with a position limiting unit. The toothed wheel includes a wheel bod
A folding device for connecting legs of a highchair includes first and second folding members, a toothed wheel, and an actuator. The first folding member is formed with a positioning groove, and the second folding member is formed with a position limiting unit. The toothed wheel includes a wheel body that is disposed between the first and second folding members and that has a periphery provided with a primary tooth engaging the positioning groove. The primary tooth engages the position limiting unit to lock the second folding member from movement relative to the first folding member when the second folding member is at an expanded position. The actuator is operated to release the second folding member from the locking action of the toothed wheel when moving the second folding member back to a folded position.
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What is claimed is: 1. A folding device adapted for interconnecting foldably first and second legs of a highchair, said folding device comprising: a first folding member adapted to be connected to the first leg and formed with at least one positioning groove; a second folding member adapted to be c
What is claimed is: 1. A folding device adapted for interconnecting foldably first and second legs of a highchair, said folding device comprising: a first folding member adapted to be connected to the first leg and formed with at least one positioning groove; a second folding member adapted to be connected to the second leg and formed with a position limiting unit that has a first contact portion and a second contact portion adjacent to said first contact portion, said second contact portion forming a step with said first contact portion and being indented relative to said first contact portion; a toothed wheel including a wheel body that is disposed between said first and second folding members and that has a periphery provided with at least one primary tooth, a portion of said primary tooth being received in said positioning groove to arrest rotation of said wheel body relative to said first folding member; a spring disposed between said wheel body and said first folding member; and an actuator disposed on one side of said wheel body opposite to said spring and accessible externally of said second folding member; said second folding member being rotatable relative to an assembly of said first folding member and said toothed wheel between a folded position, where said primary tooth of said wheel body abuts against said first contact portion of said position limiting unit, and an expanded position, where said primary tooth of said wheel body abuts against said second contact portion of said position limiting unit; wherein said actuator is operable to move said primary tooth of said wheel body away from said second contact portion of said position limiting unit against urging action of said spring to permit movement of said second folding member from the expanded position back to the folded position. 2. The folding device as claimed in claim 1, wherein said wheel body is further provided with at least one secondary tooth, said second folding member having at least one protrusion that projects toward said first folding member, said protrusion being located near a first lateral side of said secondary tooth when said second folding member is disposed at the folded position, and being located near a second lateral side of said secondary tooth when said second folding member is disposed at the expanded position. 3. The folding device as claimed in claim 2, wherein said secondary tooth has an inclined end surface interconnecting said first and second lateral sides and configuring said first lateral side to be shorter than said second lateral side, said protrusion sliding along said inclined end surface when said second folding member is moved from the folded position to the expanded position. 4. The folding device as claimed in claim 1, wherein: said wheel body is provided with a pair of said primary teeth that are disposed respectively at diametrically opposite positions on said periphery of said wheel body, and a plurality of angularly spaced apart said secondary teeth symmetrically provided between said primary teeth; and said first folding member is formed with a plurality of said positioning grooves that correspond in number to a total number of said primary and secondary teeth and that receive portions of said primary and secondary teeth, respectively. 5. The folding device as claimed in claim 4, wherein said second folding member has a plurality of protrusions that project toward said first folding member, each of said primary and secondary teeth being disposed between an adjacent pair of said protrusions when said second folding member is disposed at the folded position. 6. The folding device as claimed in claim 1, wherein said second folding member has a pair of protrusions that project toward said first folding member, said position limiting unit being disposed between said protrusions when said second folding member is disposed at the folded position. 7. A folding device adapted for interconnecting foldably first and second legs of a highchair, said folding device comprising: a first folding member adapted to be connected to the first leg and formed with at least one positioning groove; a second folding member adapted to be connected to the second leg and formed with a position limiting unit that has a first contact portion and a second contact portion adjacent to said first contact portion, said second contact portion forming a step with said first contact portion and being indented relative to said first contact portion; and a toothed wheel including a wheel body that is disposed between said first and second folding members and that has a periphery provided with at least one primary tooth, said wheel body being movable relative to said first folding member along a wheel axis, a portion of said primary tooth being received in said positioning groove to arrest rotation of said wheel body relative to said first folding member; said second folding member being rotatable relative to an assembly of said first folding member and said toothed wheel between a folded position, where said primary tooth of said wheel body abuts against said first contact portion of said position limiting unit, and an expanded position, where said primary tooth of said wheel body abuts against said second contact portion of said position limiting unit. 8. The folding device as claimed in claim 7, wherein said second folding member has a pair of protrusions that project toward said first folding member, said position limiting unit being disposed between said protrusions when said second folding member is disposed at the folded position. 9. The folding device as claimed in claim 8, wherein said wheel body is further provided with at least one secondary tooth, one of said protrusions being located near a first lateral side of said secondary tooth when said second folding member is disposed at the folded position, and being moved so as to be located near a second lateral side of said secondary tooth when said second folding member is moved to the expanded position. 10. The folding device as claimed in claim 9, wherein said secondary tooth has an inclined end surface interconnecting said first and second lateral sides and configuring said first lateral side to be shorter than said second lateral side, said one of said protrusions sliding along said inclined end surface when said second folding member is moved from the folded position to the expanded position. 11. The folding device as claimed in claim 7, further comprising an actuator for moving said wheel body along the wheel axis. 12. The folding device as claimed in claim 7, further comprising a spring for biasing said wheel body toward said second folding member.
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