An infant stroller apparatus includes a first and a second leg segment, a handle segment and a backrest frame. The first and second leg segments are respectively affixed with a first and a second coupling member that are connected with each other. The handle segment is affixed with a third coupling
An infant stroller apparatus includes a first and a second leg segment, a handle segment and a backrest frame. The first and second leg segments are respectively affixed with a first and a second coupling member that are connected with each other. The handle segment is affixed with a third coupling member that is connected with the first coupling member. The backrest frame is connected with the second leg segment. A latch assembled with the second coupling member is movable to engage with the third coupling member to lock the handle segment and the first and second leg segments in an unfolded state. A release actuator operatively connected with the latch is pivotally connected with the second leg segment adjacent to the pivot axis of the backrest frame. The release actuator is rotatable to cause the latch to disengage from the third coupling member for allowing folding of the infant stroller apparatus.
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1. An infant stroller apparatus comprising: a first and a second leg segment respectively affixed with a first and a second coupling member, the first and second coupling members being pivotally connected with each other;a handle segment affixed with a third coupling member, the third coupling membe
1. An infant stroller apparatus comprising: a first and a second leg segment respectively affixed with a first and a second coupling member, the first and second coupling members being pivotally connected with each other;a handle segment affixed with a third coupling member, the third coupling member being pivotally connected with the first coupling member;a latch assembled with the second coupling member, the latch being movable relative to the second coupling member to engage with the third coupling member to lock the handle segment and the first and second leg segments in an unfolded state, wherein the latch is connected with a driving part, the driving part being slidably assembled with the second coupling member, the driving part sliding relative to the second coupling member to drive rotation of the latch to engage with or disengage from the third coupling member;a backrest frame pivotally connected with the second leg segment about a pivot axis; anda release actuator connected with the driving part and pivotally connected with the second leg segment about the pivot axis of the backrest frame, the release actuator further being operatively connected with the latch, wherein the release actuator is rotatable to cause the latch to disengage from the third coupling member for allowing folding of the handle segment and the first and second leg segments. 2. The infant stroller apparatus according to claim 1, wherein the release actuator includes a transversal bar extending from a left to a right side of the infant stroller apparatus, and an operating handle affixed with the transversal bar. 3. The infant stroller apparatus according to claim 2, wherein the transversal bar pivotally supports the backrest frame. 4. The infant stroller apparatus according to claim 1, wherein the release actuator is connected with the driving part via a wire, the release actuator being rotatable relative to the second leg segment to urge the driving part to slide in a first direction for causing the latch to disengage from the third coupling member. 5. The infant stroller apparatus according to claim 4, wherein the driving part is further biased by a spring in a second direction for causing the latch to engage with the third coupling member. 6. The infant stroller apparatus according to claim 1, wherein the backrest frame is affixed with a coupling shell that is pivotally connected with the second leg segment, and the release actuator is assembled through the coupling shell. 7. The infant stroller apparatus according to claim 1, further including a second latch operable to lock the backrest frame with respect to the second leg segment, and the release actuator is rotatable to drive concurrent unlocking displacements of the two latches. 8. The infant stroller apparatus according to claim 7, wherein the backrest frame is provided with a second release actuator operatively connected with the second latch, the second release actuator being operable independent from the release actuator connected with the second leg segment to drive the unlocking displacement of the second latch. 9. The infant stroller apparatus according to claim 7, wherein the release actuator includes a transversal bar pivotally connected with the second leg segment, and the second latch is slidable along the transversal bar. 10. The infant stroller apparatus according to claim 9, wherein the transversal bar is affixed with a driving portion, the driving portion being rotatable with the transversal bar to push the second latch to slide along the transversal bar for unlocking the backrest frame. 11. The infant stroller apparatus according to claim 1, wherein the latch and the first coupling member are pivotally connected with the second coupling member about a same pivot axis. 12. The infant stroller apparatus according to claim 1, wherein the first leg segment is a front leg segment, and the second leg segment is a rear leg segment. 13. The infant stroller apparatus according to claim 1, wherein the second coupling member includes two sidewalls, and the latch and the first and third coupling members are received at least partially in a gap between the two sidewalls of the second coupling member. 14. An infant stroller apparatus comprising: a first and a second leg segment respectively affixed with a first and a second coupling member, the first and second coupling members being pivotally connected with each other about a first pivot axis, and the second coupling member including two sidewalls and being affixed with a shaft portion;a handle segment affixed with a third coupling member, the third coupling member being pivotally connected with the first coupling member about a second pivot axis spaced apart from the first pivot axis, and the third coupling member further having a guide slot spaced apart from the second pivot axis, the shaft portion of the second coupling member being guided for relative sliding displacement along the guide slot; anda latch assembled with the second coupling member, the latch and the first and third coupling members being received at least partially in a gap between the two sidewalls of the second coupling member, and the latch being movable relative to the second coupling member to engage with the third coupling member to lock the handle segment and the first and second leg segments in an unfolded state. 15. The infant stroller apparatus according to claim 14, wherein the latch and the third coupling member are received at least partially in a space delimited between the first coupling member and one of the two sidewalls. 16. The infant stroller apparatus according to claim 14, wherein the latch is pivotally connected with the second coupling member about the first pivot axis. 17. The infant stroller apparatus according to claim 14, wherein the first leg segment is a front leg segment, and the second leg segment is a rear leg segment. 18. The infant stroller apparatus according to claim 14, wherein the latch is connected with a driving part, the driving part being slidably connected with the second coupling member, the driving part sliding relative to the second coupling member to drive rotation of the latch to engage with or disengage from the third coupling member. 19. The infant stroller apparatus according to claim 18, further including: a release actuator pivotally connected with the second leg segment about a third pivot axis extending from a left side to a right side of the infant stroller apparatus, the release actuator being connected with the driving part via a wire, the release actuator being rotatable relative to the second leg segment to urge the driving part to slide in a first direction for causing the latch to disengage from the third coupling member. 20. The infant stroller apparatus according to claim 19, wherein the driving part is further biased by a spring in a second direction opposite to the first direction for causing the latch to engage with the third coupling member. 21. The infant stroller apparatus according to claim 19, wherein the release actuator includes a transversal bar having an end that is pivotally connected with the second leg segment, the end of the transversal bar being connected with the wire. 22. The infant stroller apparatus according to claim 21, wherein the transversal bar is affixed with an operating handle arranged at a central location between the left and right side. 23. The infant stroller apparatus according to claim 19, further including a backrest frame pivotally connected with the second leg segment at a location adjacent to the release actuator. 24. The infant stroller apparatus according to claim 23, wherein the backrest frame is affixed with a coupling shell that is pivotally connected with the second leg segment, and the release actuator is assembled through the coupling shell. 25. The infant stroller apparatus according to claim 24, further including a second latch operable to engage with the coupling shell to lock the backrest frame with respect to the second leg segment, and the release actuator is rotatable to drive concurrent unlocking displacement of the two latches. 26. An infant stroller apparatus comprising: a first and a second leg segment respectively affixed with a first and a second coupling member, the first and second coupling members being pivotally connected with each other;a handle segment affixed with a third coupling member, the third coupling member being pivotally connected with the first coupling member;a backrest frame pivotally connected with the second leg segment;a first latch assembled with the second coupling member, the first latch being movable to engage with the third coupling member to lock the handle segment and the first and second leg segments in an unfolded state;a second latch operable to lock the backrest frame with respect to the second leg segment; anda release actuator pivotally connected with the second leg segment, the release actuator being rotatable to drive concurrent unlocking displacements of the first and second latches for folding the infant stroller apparatus. 27. The infant stroller apparatus according to claim 26, wherein the release actuator includes a transversal bar extending from a left to a right side of the infant stroller apparatus, and an operating handle affixed with the transversal bar. 28. The infant stroller apparatus according to claim 27, wherein the transversal bar pivotally supports the backrest frame. 29. The infant stroller apparatus according to claim 27, wherein the second latch is slidable along the transversal bar. 30. The infant stroller apparatus according to claim 29, wherein the transversal bar is affixed with a driving portion, the driving portion being rotatable with the transversal bar to push the second latch to slide along the transversal bar for unlocking the backrest frame. 31. The infant stroller apparatus according to claim 26, wherein the first latch is connected with a driving part, the driving part being assembled adjacent to the second coupling member and connected with the release actuator via a wire, the driving part sliding relative to the second coupling member to drive rotation of the first latch to engage with or disengage from the third coupling member.
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