Stroller frame

Patent metadata

Field	Value
Publication number	US-9855964-B2
Application number	US-201715428736-A
Country	US
Kind code	B2
Filing date	Feb 9, 2017
Priority date	Feb 29, 2016
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A stroller frame includes a seat pan, an operating handle movably coupled to the seat pan, and two opposite foldable side frame units each including a front leg, a handle rod, a rear leg that has a top end pivotally connected to the handle rod, a bottom leg that has a lower end pivotally connected to the rear leg, and a sliding basket tube that is movably coupled to said seat pan and slidably connected to said rear leg. To unfold the stroller frame, said operating handle is pushed downward to drive said seat pan to pivot downward so that an angle between said front leg and said bottom leg of each of said side frame units increases until said stroller frame is converted from a folded state to an unfolded state.

First claim

What is claimed is:

1. A stroller frame comprising:
a seat pan having two guide slots that are respectively formed in opposite lateral sides of said seat pan;
an operating handle movably coupled to said seat pan; and
two opposite foldable side frame units respectively disposed at said opposite lateral sides of said seat pan, each of said side frame units including
a front leg that is pivotally connected to said seat pan at a pivot point,
a handle rod that has a pivot end portion pivotally connected to said front leg,
a rear leg that has a top end pivotally connected to said handle rod, and a bottom end opposite to said top end,
a bottom leg that has a lower end pivotally connected to said bottom end of said rear leg, and an upper end opposite to said lower end,
a sliding basket tube that is slidably connected to said rear leg, and that has a protruding portion pivotally and slidably engaging a respective one of said guide slots of said seat pan, and
a sliding joint that surrounds said sliding basket tube for guiding sliding movement of said sliding basket tube relative to said rear leg during conversion of said stroller frame between a folded state and an unfolded state.

2. The stroller frame as claimed in claim 1 , wherein to fold said stroller frame from the unfolded state, said operating handle is pulled upward to drive said seat pan to pivot upward relative to said front leg of each of said side frame units such that said front leg, said bottom leg, and said rear leg of each of said side frame units move toward one another to convert said stroller frame to the folded state.

3. The stroller frame as claimed in claim 2 , wherein:
said seat pan includes a base portion, and two side wall portions that are disposed respectively at said lateral sides thereof, that extend downward from said base portion, and that respectively have said guide slots; and
said protruding portion of said sliding basket tube of each of said side frame units extends laterally from an end portion of said sliding basket tube to slidably engage the respective one of said guide slots.

4. The stroller frame as claimed in claim 3 , wherein:
each of said guide slots is arc-shaped, and has opposite first and second slot end portions that are respectively proximate to and distal from said pivot point of a respective one of said side frame units;
when said stroller frame is converted from the folded state to the unfolded state, said seat pan is pivoted relative to said front leg of each of said side frame units in a first direction while said protruding portion of said sliding basket tube of each of said side frame units slides from said second slot end portion to said first slot end portion of the respective one of said guide slots in a second direction which is opposite to the first direction; and
when said stroller frame is in the unfolded state, said sliding basket tube of each of said side frame units extends substantially parallel to said seat pan and supports said seat pan.

5. The stroller frame as claimed in claim I, wherein each of said side frame units further has a locking member that is connected between said handle rod and said front leg, and that is operable to move between a locked position and an unlocked position for restraining and permitting pivotal movement of said handle rod relative to said front leg, respectively.

6. The stroller frame as claimed in claim 5 , wherein said locking member is linked to said operating handle through a cable, and is actuated by a pivotal movement of said operating handle.

7. The stroller frame as claimed in claim 6 , wherein, said operating handle has first, second and third operating positions, where the first operating position corresponds to a natural resting place of the operating handle, the second and third operating positions correspond to different pivoting movements of the operating handle, and the second operating position is between the first and third operating positions.

8. The stroller frame as claimed in claim 7 , wherein, said locking member is at the unlocked position when the operating handle is at the third operating position, and said operating handle is at the second operating position when said stroller frame is carried and locked.

9. The stroller frame as claimed in claim 1 , wherein said sliding joint of each of said side frame units has a main body portion sleeved on said sliding basket tube, and two end portions pivoted to said rear leg for guiding sliding movement of said sliding basket tube relative to said rear leg during conversion of said stroller frame between the folded state and the unfolded state.

10. The stroller frame as claimed in claim 9 , wherein:
said sliding basket tube of each of said side frame units has one end coupled to said seat pan, and an opposite end; and
a distance between said sliding joint and said opposite end of said sliding basket tube decreases during the conversion of said stroller frame from the folded state to the unfolded state.

11. The stroller frame as claimed in claim 1 , further comprising an auxiliary seat plate that is connected between said sliding basket tubes of said side frame units, and that is formed with a recess in one side thereof and corresponding in position to said operating handle when said stroller frame is in the unfolded state for easy access of said operating handle.

12. A stroller frame comprising:
a seat pan;
an operating handle movably coupled to said seat pan; and
two opposite foldable side frame units respectively disposed at opposite lateral sides of said seat pan, each of said side frame units including
a front leg that is pivotally connected to said seat pan at a pivot point,
a handle rod that has a pivot end portion pivotally connected to said front leg,
a rear leg that has a top end pivotally connected to said handle rod, and a bottom end opposite to said top end,
a bottom leg that has a lower end pivotally connected to said bottom end of said rear leg, and an upper end opposite to said lower end, and
a sliding basket tube that is slidably connected to said rear leg and movably coupled to said seat pan;

wherein said stroller frame is operable to a folded state, where a projection of said operating handle on an imaginary horizontal plane is located between a line defined between projections of said top ends of said rear legs on the imaginary horizontal plane and a line defined between projections of said upper ends of said bottom legs on the imaginary horizontal plane;
wherein, to unfold said stroller frame, said operating handle is pushed downward to drive said seat pan to pivot downward relative to said front leg of each of said side frame units, so that an angle between said front leg and said bottom leg of each of said side frame units increases until said stroller frame is converted from the folded state to an unfolded state, said sliding basket tube sliding relative to said rear leg during conversion of said stroller frame between the unfolded state and the folded state.

13. The stroller frame as claimed in claim 12 , wherein each of said side frame units further including a sliding joint that has a main body portion sleeved on said sliding basket tube, and two end portions pivoted to said rear leg for guiding sliding movement of said sliding basket tube relative to said rear leg during the conversion of said stroller frame between the unfolded state and the folded state.

14. The stroller frame as claimed in claim 13 , wherein:
said sliding basket tube of each of said side frame units has one end coupled to said seat pan, and an opposite end; and
a distance between said sliding joint and said o

Assignees

• Wonderland Switzerland Ag

Inventors

• Sack Daniel
• Hartenstine Curtis
• Miller Ryan
• Horst Andrew

Classifications

• B62B2205/04

  box-shaped in folded position · CPC title

• B62B2301/04

  comprising a wheel pivotable about a substantially vertical axis, e.g. swivelling castors · CPC title

• B62B7/068

  by sliding a bushing along a rod, e.g. like folding means of an umbrella · CPC title

• B62B7/10 Primary

  by folding down the body to the wheel carriage or by retracting projecting parts into the box-shaped body · CPC title

• B62B7/044

  three wheeled · CPC title