GB2442127A - Foldable stroller - Google Patents

Foldable stroller Download PDF

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Publication number
GB2442127A
GB2442127A GB0718290A GB0718290A GB2442127A GB 2442127 A GB2442127 A GB 2442127A GB 0718290 A GB0718290 A GB 0718290A GB 0718290 A GB0718290 A GB 0718290A GB 2442127 A GB2442127 A GB 2442127A
Authority
GB
United Kingdom
Prior art keywords
side rod
frame
members
rod sections
leg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0718290A
Other versions
GB0718290D0 (en
GB2442127B (en
Inventor
Shun-Min Chen
Jian-Qun Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wonderland Nurserygoods Co Ltd Taiwan
Original Assignee
Wonderland Nurserygoods Co Ltd Taiwan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNU2007201571621U external-priority patent/CN201082719Y/en
Application filed by Wonderland Nurserygoods Co Ltd Taiwan filed Critical Wonderland Nurserygoods Co Ltd Taiwan
Publication of GB0718290D0 publication Critical patent/GB0718290D0/en
Publication of GB2442127A publication Critical patent/GB2442127A/en
Application granted granted Critical
Publication of GB2442127B publication Critical patent/GB2442127B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/08Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/08Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
    • B62B7/083Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis the wheel axes being moved from each other during folding
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00Additional features or accessories of hinges
    • E05D11/10Devices for preventing movement between relatively-movable hinge parts
    • E05D11/1028Devices for preventing movement between relatively-movable hinge parts for maintaining the hinge in two or more positions, e.g. intermediate or fully open
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/20Catches; Locking or releasing an articulation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/20Catches; Locking or releasing an articulation
    • B62B2205/22Catches; Locking or releasing an articulation remotely controlled, e.g. from the handlebar
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/20Catches; Locking or releasing an articulation
    • B62B2205/24Catches; Locking or releasing an articulation to hold in the folded position
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/26Arrangements for standing up in folded position

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Abstract

A foldable stroller (1) includes a frame (10), a seat (2), and a plurality of casters (20, 30). The seat (2) is disposed on the frame (10). The frame (10) includes two back-frame side rod sections (132), two rear-leg side rod sections (122), and two rear-leg connecting members (133). Each of the back-frame side rod sections (132) is connected pivotally to the corresponding rear-leg side rod section by the corresponding rear-leg connecting member (133). As such, the back-frame side rod sections (132) are pivotable respectively on the rear-leg side rod sections (122) to fold the frame (10). The frame (10) further includes two knuckles (7) disposed respectively on bottom ends of the back-frame side rod sections (132), and two latch mechanisms (6) disposed respectively on the knuckles (7). The latch mechanisms (6) may be operable to lock the frame (10) in an unfolded or folded state.

Description

1 2442127
FOLDABLE STROLLER
This invention relates to a stroller, and more particularly to a foldable stroller.
With reference to Fig. 1, a conventional stroller 100 is in an unfolded state. With further reference to Fig. 2, the stroller 100 is converted into a folded state. The stroller 100 includes two front rod units, two rear rods 103, and a plurality of casters 104.
Each of the front rod units includes an upper rod section 101 and a lower rod section 102. Each of the upper rod sections 101 includes a handle 105 disposed at a top end thereof. Each of the rear rods 103 has a top end connected to a bottom end portion of the corresponding upper rod sections 101. The casters 104 are mounted respectively on bottom ends of the lower rod sections 102 and the rear rods 103. When the stroller 100 is unfolded, the front rod units form an angle with respect to the rear rods 103, and the casters 104 are disposed on the ground surface. When it is desired to fold the stroller 100, each of the upper rod sections 101 is pivoted about a bottom end pivot point thereof to abut against a rear side of the corresponding rear rod 103. Hence, the lower rod sections 102 and the casters 104 on the lower rod sections 102 are lifted as a result of movement of the pivoting movement of the upper rod sections 101, thereby abutting against front sides of the rear rods 103.
An object of this invention is to provide a foldable stroller, which includes a knuckle for jterconneCtiflg pivotally two rods, and a latch mechanism for locking the rods in an unfolded or folded state.
According to an aspect of this invention, there is provided a foldable stroller comprising a foldable frame, a seat disposed on the frame, as well as a plurality of front and rear casters, the frame including a pair of rear-leg side rod sections,a pair of front-leg side rod sections, and a pair of back-frame side rod sections, the front and rear casters being mounted respectively on bottom ends of the front-leg and rear-leg side rod sections, wherein the frame further includes two rear-leg connecting members connected respectively to the back-frame side rod sections, and two knuckles disposed respectively on bottom ends of the back-frame side rod sections, the rear-leg side rod sections being connected respectively and pivotally to the back-frame side sections by the rear-leg connecting members, respectively, such that any two adjacent ones of the back-frame side rod sections, the front-leg side rod sections, and the rear-leg side rod sections at one side can be pivoted toward each other, thereby folding the frame.
According to another aspect of this invention, there is provided a foldable stroller comprising a foldable frame, the foldable frame including a connecting member, a first rod, a second rod connected to the first rod by the connecting member, and a knuckle including a first pivot member disposed on an end of one of the first and second rods, and a second pivot member disposed on the connecting member and connected pivotally to the first pivot member, the first and second pivot members being pivotable relative to each other so as to convert the first and second rods between unfolded and folded states.
These and other features and advantages of this invention will become apparent in the following detailed description of the preferred embodiments of this invention, with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of a conventional stroller; Fig. 2 is a side view of the conventional stroller in a folded state; Fig. 3 is a perspective view of the first preferred embodiment of a foldable stroller according to this invention; Fig. 4 is a side view of the first preferred embodiment in an unfolded state; Fig. 5 is a side view of the first preferred embodiment in a folded state; Fig. 6 is a perspective view of the first preferred embodiment in the folded state; Fig. 7 is an exploded perspective view of a latch mechanism of the first preferred embodiment; Fig. 8 is a partly sectional view of the latch mechanism of the first preferred embodiment when the stroller is in the unfolded state; Fig. 9 is a partly sectional view of the latch mechanism of the first preferred embodiment when the stroller is in the folded state; Fig. 10 is an exploded perspective view of a latch mechanism of the second preferred embodiment of a foldable stroller according to this invention; Fig. 11 is a partly sectional view of the latch mechanism of the second preferred embodiment when the stroller is in an unfolded state; Fig. 12 is a side view of the third preferred embodiment of a foldable stroller according to this invention in an unfolded state; Fig. 13 is a side view of the third preferred embodiment in a folded state; Fig. 14 is a sectional view of a knuckle of the third preferred embodiment when the stroller is in the unfolded state; Fig. 15 is a schematic side view of the knuckle of the third preferred embodiment when the stroller is in the unfolded state; Fig. 16 is a sectional view of the knuckle of the third preferred embodiment when the stroller is in the folded state; and Fig. 17 is a schematic side view of the knuckle of the third preferred embodiment when the stroller is in the folded state.
Before the present invention is described in greater detail in connection with the preferred embodiments, it should be noted that similar elements and structures are designated by like reference numerals throughout the entire
disclosure.
Referring to Figs. 3, 4, and 5, the first preferred embodiment of a foldable stroller 1 according to this invention includes a frame 10, a seat 2, a pair of front casters 20, a pair of rear casters 30, and two links 43 (only one is shown). The frame 10 includes a front leg 11, a rear leg 12, a back frame 13, two side armrests 3, a rack 4, a bottom rod 120, and a canopy frame 5, which are interconnected such that the stroller 1 and the frame 10 are convertible between an unfolded state shown in Fig. 4 and a folded state shown in Fig. 5.
The front leg 11 is generally U-shaped, and includes a front-leg horizontal rod section 111 and two front-leg side sections 112 connected respectively to two ends of the front-leg horizontal rod section 111. The bottom rod is connected fixedly to the front-leg side rod sections 112, and is parallel and adjacent to the front-leg horizontal rod section 111. The front casters 20 are mounted respectively on two ends of the bottom rod 120 by two automatic steering mechanisms 16, respectively. The functions of the automatic steering mechanisms 16 will be described hereinafter.
The rear leg 12 is connected pivotally to the front leg 11 by a pivot member 12', and includes two rear-leg side rod sections 122 inclined forwardly and upwardly. Two rear casters 30 are mounted respectively on bottom ends of the rear-leg side rod sections 122. A protective rail 121 is connected between the rear-leg side rod sections 122. A food tray (not shown) is connected fixedly to the protective rail 121. The protective rail 121 may be connected removably to the rear-leg side rod sections 122 to thereby allow for removal of the protective rail 121 so that a baby may be placed conveniently into the stroller 1.
The back frame 13 is inverted U-shaped, and includes a back-frame horizontal rod section 131 and two back-frame side rod sections 132 connected respectively to two ends of the back-frame horizontal rod section 131. Each of the back-frame side rod sections 132 has a bottom end connected to a rear-leg connecting member 133 by a knuckle 7. The rearleg connecting members 133 are configured as rods.
As such, each of the back-frame side rod sections 132 is pivotable relative to the corresponding rear-leg connecting member 133. Each of the rear-leg connecting members 133 includes a rear-leg connecting seat 134 disposed at a bottom end thereof and connected pivotally to the corresponding rear-leg side rod sections 122. As such, the back frame 13 is pivotable relative to the rear-leg side rod sections 122. The detailed structure of the knuckles 7 will be described hereinafter.
The side armrests 3 have front ends connected respectively and pivotally to the rear-leg side rod sections 122, and rear ends connected respectively and pivotally to the back-frame side rod sections 132.
The seat 2 is disposed on the frame 10, and includes a bottom plate 22 and a back plate 21. The back plate 21 has a bottom end connected pivotally to a rear end of the bottom plate 22. The bottom plate 22 has two opposite sides connected respectively and pivotally to the rear-leg connecting members 133.
The rack 4 is disposed on the front and rear legs 11, 12, and includes a transverse rod section 41 and two io longitudinal rod sections 42 extending respectively and forwardly from two ends of the transverse rod section 41 to form a U-shaped frame. The longitudinal rod sections 42 have front ends connected respectively and pivotally to the front-leg side rod sections 112 at positions under the bottom plates 22, and rear ends disposed behind the rear leg 12 and directly above the rear casters 30, respectively. The links 43 have upper ends connected respectively and pivotally to the bottom plate 22, and lower ends connected respectively and pivotally to the longitudinal rod sections 42. As such, when the frame 10 is folded, the pivoting movement of the rack 4 and the seat 2 relative to the remaining members of the frame 10 is allowed. In this embodiment, the rack 4 is configured as a basket frame for connection with a basket.
The canopy frame 5 includes two inverted U-shaped first and second canopy_supporting rods 51, 52 interconnected by a hinge unit 53 and disposed pivotally on an assembly of the back-f raine side rod sections 132 at positions above the side armrests 3.
With particular reference to Fig. 4, when the stroller 1 is in the unfolded state, each of the front leg 11 and the back frame 13 forms an angle with respect to the rear leg 12, and the rack 4 is disposed horizontally between the seat 2 and an assembly of the front and rear casters 20, 30. Further, the first canopy-supporting rod 51 is generally parallel to the back frame 13, and the second canopy-supporting rod 52 forms an angle with respect to the first canopy-supporting rod 51. In this state, a canopy (not shown) can be supported by the first and second canopy-supporting rods 51, 52. When the canopy is not used, the second canopy-supporting rod 52 is pivoted toward the first canopy-supporting rod 51 so as to abut against the same.
With particular reference to Figs. 5 and 6, to fold the stroller 1, the front leg 11 is pivoted toward the rear leg 12. Since the distance between a bottom end of the front leg 11 and the pivot member 12' is shorter than that between a bottom end of the rear leg 12 and the pivot member 12', when the front leg 11 is pivoted toward the rear leg 12, The front casters 20 are lifted away from the ground surface.
Hence, lower portions 15 of the automatic steering mechanisms 16 are separated from upper portions 14 of the automatic steering mechanisms 16 in a downward direction and by a predetermined amount by virtue of gravity, thereby allowing for rotation of the lower portions 15 relative to upper portions 14. As a result, when the stroller 1 is in the folded state, if necessary, the front casters 20 may be pivoted in directions shown by the arrows (A) in shown in Fig. 6 until a side surface of each of the front casters 20 faces forwardly (i.e., the horizontal rotating axes of the front casters 20 are perpendicular to those of the rear casters 30) to thereby reduce the width of the stroller 1 in a front-to-rear direction. Since the automatic steering mechanisms 16 do not pertain to this invention, a further description thereof will be omitted herein for the sake of brevity.
With further reference to Figs. 7, 8, and 9, each of the knuckles 7 includes a first pivot seat 71 and a second pivot seat 72 that have a circular first pivot member 712 and a circular second pivot member 722, respectively. Each of the first pivot members 712 includes two spaced-apart parallel circular side plates. Each of the second pivot members 722 is configured as a circular plate, and is disposed between the circular side plates of the corresponding first pivot member 712. Each of upper ends of the first pivot members 712 is formed with an upper tube portion 711 connected to the corresponding back-frame side rod section 132. Each of lower ends of the second pivot members 722 is formed with a lower tube portion 721 connected to a top end of the corresponding rear-leg connecting member 133.
The first and second pivot members 712, 722 of each of the knuckles 7 are locked relative to each other by a latch mechanism 6 when the stroller 1 is in the unfolded or folded state. To unfold or fold the stroller 1, it is necessary to unlock each of the first pivot members 712 from the corresponding second pivot member 722 in advance. With particular reference to Fig. 7, each of the latch mechanisms 6 includes a lockingmernber 61, a guide pin 62, a compression spring 64, and a slide slot 65 formed in the corresponding second pivot member 722. Each of the slide slots 65 has a longitudinal slot portion 66 extending along a longitudinal direction of the corresponding back-frame side rod section 132, and a circumferential slot portion 67 extending from an upper end of the longitudinal slot portion 66 along a circumferential direction of the corresponding second pivot member 722. Each of the longitudinal slot portions 66 has a first positioning portion 68 disposed at a lower end thereof. Each of the circumferential slot portions 67 has a barb-shaped second positioning portion 69 disposed at an end thereof distal from the corresponding longitudinal slot portion 66.
Each of the locking members 61 has a body 611 disposed movably within the corresponding upper tube portion 711, and a positioning pin 63 connected fixedly to the body 611.
Each of the bodies 611 is formed with two parallel lugs 612 extending downwardly therefrom and flanking the corresponding second pivot member 722. In this embodiment, each of the circular side plates of each of the first pivot members 712 is formed with a recess 713 for receiving the lugs 612 of the corresponding locking member 61. Each of the locking members 61 further includes a rod portion 613 extending upwardly from the corresponding body 611 and formed with a guide slot 614 extending in a longitudinal direction thereof and having two closed ends. Each of the guide pins 62 extends through the guide slot 614 in the rod portion 613 of the corresponding locking member 61, and is disposed fixedly in the corresponding back-frame side rod section 132. As such, each of the locking members 61 is movable within the corresponding upper tube portion 711 along the longitudinal direction until either of the closed ends of the corresponding guide slot 614 engages the corresponding guide pin 62. Each of the compression springs 64 is sleeved on the rod portion 613 of the corresponding locking member 61 between the corresponding body 611 and the corresponding guide pin 62. As such, each of the locking members 61 is biased to project from the bottom end of the corresponding back-frame side rod sections 132 to allow for movement of the corresponding positioning pin 63 within the corresponding slide slot 65 and, thus, relative rotation of the corresponding first and second pivot members 712, 722.
With particular reference to Figs. 4 and 8, when the stroller 1 is unfolded, each of the positioning pins 63 is biased by the corresponding compression spring 64 to engage the first positioning portion 68 of the corresponding slide slot 65, thereby locking each of the back-frame side rod sectionS 132 and the corresponding rear-leg connecting member 133 in an unfolded state shown in Fig. 8. Hence, the stroller is maintained in the unfolded state. When it is desired to fold the stroller 1, in each of the latch mechanisms 6, a pull cable 610 is operable to pull the locking member 61 upwardly to thereby move the positioning pin 63 from the first positioning portion 68 into the upper end of the longitudinal slot portion 66. In this state, the positioning pin 63 is movable along the circumferential slot portion 67. Hence, the first and second pivot members 712, 722 are rotatable relative to each other. Further, the back-frame side rod sections 132 are pivotable and foldable relative to the rear-leg connecting members 133, respectively. As a result, the stroller 1 can be folded. When the stroller 1 is converted into the folded state shown in Fig. 5, the positioning pins 63 engage respectively the second positioning portions 69 to lock each of the back-frame side rod sections 132 and the corresponding rear-leg connecting member 133 in a folded state shown in Fig. 9. With particular reference to Figs. 5 and 6, when folded, the stroller 1 can be maintained in a vertical state in such a manner that the rear casters 30 and the transverse rod section 41 of the rack 4 are in contact with the ground surface. A cushion member 40 may be sleeved on the transverse rod section 41 to maintain the stroller 1 stably in the vertical folded state.
As such, the stroller 1 can be locked in the unfolded or folded state by the latch mechanisms 6 in such a manner to prevent relative rotation of the first and second pivot members 712, 722 of each of the knuckles 6. To change the state of the stroller 1, the first and second pivot members 712, 722 must be unlocked from each other prior to conversion between the unfolded and folded states of the io corresponding back-frame side rod section 132 and the rear-leg connecting member 133.
Figs. 10 and 11 show a latch mechanism 6' of the second preferred embodiment of a folded stroller according to this invention. The latch mechanism 6' is similar in is construction to that of the first preferred embodiment.
In this embodiment, the slide slot 65 (see Fig. 7) is omitted from the second pivot member 722, and is replaced with first and second positioning grooves 68', 69', which are formed in a periphery of the second pivot member 722. In addition, the locking member 61' has a body 611' and a projection 612' extending downwardly from the body 611' and biased to engage a selected one of the first and second positioning grooves 68', 69', thereby locking the stroller in a selected one of the unfolded and folded states.
With reference to Figs. 12, 13, 14, and 15, the third preferred embodiment of a foldable stroller according to this invention includes a frame 8, a seat 82, andapluralitY of front and rear casters 83.
The frame 8 includes left and right frame bodies 81 disposed respectively at two opposite sides thereof. The seat 82 is disposed between the left and right frame bodies 81. Each of the left and right frame bodies 81 includes a back-frame side rod section 811, a front-leg side rod section 812, a rear-leg side rod section 813, a bottom rod 814, a rear-leg connecting member 91, a knuckle 84, and a latch mechanism 9 (see Fig. 14). Each of the back-frame side rod sections 811 has a bottom end received within a receiving tube portion 911 of the corresponding rearleg connecting member 91. The back-frame side rod sections 811 have upper ends interconnected by a horizontal rod section 815 (see Fig. 12) to constitute a back frame. The rear-leg connecting member 91 further includes a rear-leg connecting portion 912 connected pivotally to the corresponding rear-leg side rod section 813.
One of the left and right frame bodies 81 will be described in the succeeding paragraphs.
The knuckle 84 includes a first pivot seat 841 disposed on both a bottom end of the receiving tube portion 911 of the rear-leg connecting member 811 and the bottom end of the back-frame side rod section 811, and a second pivot seat 842 disposed on a top end of the front-leg side rod section 812. The first pivot seat 841 includes a first pivot member 843 including two spaced-apart parallel circular side plates. The second pivot seat 842 includes a second pivot member 844 configured as a circular plate and disposed pivotally between the circular side plates of the first pivot members 843. As such, the front-leg side rod sectIon 812 is connected pivotally to the back-frame side rod section 811 by the knuckle 84. The rear-leg side rod section 813 has a top end connected pivotally to the rear-leg connecting portion 912. The bottom rod 814 is connected pivotally between the front-leg side rod section 812 and the rear-leg side rod section 813. Due to the presence of the knuckle 84 nd the rear-leg connecting member 91, any two adjacent ones of the back-frame side rod section 811, the front-leg side rod section 812, and the rear-leg side rod section 813 at one side are pivotable relative to each other. Hence, the stroller body 81 can be converted between an unfolded state shown in Fig. 12 and a folded state shown in Fig. 13.
The latch mechanism 9 includes a positioning groove 91' formed in the second pivot member 844, a sliding rod 92 disposed on the second pivot member 844, a curved slide slot 93 formed in one of the side plates of the first pivot member 843, and a position-limiting portion 94. The slide slot 93 extends along a circumferential direction of the first pivot member 843 by an angle of about 180 degrees, and has opposite first and second ends 931, 932. The extension angle of the slide slot 93 may be changed according to a desired angle formed between the back-frame side rod section 811 and the front-leg side rod section 812. The sliding rod 92 is movable within the slide slot 93 unless it is locked at the second end 932 of the slide slot 93 by the position-limiting portion 94. The latch mechanism 9 further includes a locking member 95, a guide pin 96, and a compression spring 97, which are disposed within a bottom end portion of the back-frame side rod section 811.
The position-limiting portion 94 includes a resilient wall 941 defining the slide slot 93, and a projection 942 extending from the resilient wall 941 into the slide slot 93.
The locking member 95 includes a body 951 disposed in the back-frame side rod section 811, a projection 952 extending downwardly from the body 951 and biased to project from the bottom end of the back-frame side rod section 811, and a rod portion 953 extending upwardly from the body 951.
The rod portion 953 has a dome-shaped top end 954, and is formed with a guide slot 955 extending along a longitudinal direction thereof. The guide pin 96 is disposed fixedly on and perpendicular to the back-frame side rod section 811. The compression spring 97 is sleeved on the rod portion 953 between the guide pin 96 and the body 951. An actuating mechanism (not shown) is disposed on the horizontal rod portion 815, and is connected to the top end of the rod portion 953 by a pull cable 90. The actuating mechanism is operable to move the pull cable 90 and, thus, the locking member 95 upwardly to retract the projection 952 into the back-frame side rod section 811, as shown in Fig. 16.
With particular reference to Fig. 12, when the frame body 81 is unfolded, the back-frame side rod section 811 is generally aligned with the front-leg side rod section 812, and the projection 952 engages the positioning groove 91' to lock the back-frame rod section 811 relative to the front-leg side rod section 812. In this state, the sliding rod 92 is disposed in the first end 931.
When it is desired to fold the frame body 81, the actuating mechanism is operated to remove the projection 952 from the positioning groove 91' to thereby unlock the back-frame side rod section 811 from the front-leg side rod section 812. Next, the back-frame side rod section 811 and the front-leg side rod section 812 are pivoted toward each other. Further, the back-frame side rod section 811 is pivoted toward the front-leg side rod section 812 in a direction shown by the arrow 900 in Fig. 12, and the front-leg side rod section 812 is pivoted toward the bottom rod 814 in a direction shown by the arrow 901 in Fig. 12.
Hence, the frame body 81 is converted into a folded state shown in Fig. 13. In this state, with particular reference to Fig. 17, the sliding rod 92 is confined between the projection 942 and a wall of the first pivot member 843 defining the second end 932 of the slide slot 93 to lock the back-frame side rod section 811 and the front-leg side rod section 812 in a folded state.
Subsequently, a force can be applied to pivot the back-frame side rod section 81]. away from the front-leg side rod section 812 such that the sliding rod 92 is forcibly passed over the projection 942. As a consequence, the frame body 81 can be returned to the unfolded state shown in Fig. 12.
In view of the above, the foldable stroller of this invention has the following advantages: (1) When the stroller 1 is folded, major portions of the back-frame side rod sections 132, 811 overlap the rear- leg side rod sections 122 or the front-leg side rod sections 812. Thus, the volume of the folded stroller 1 can be reduced effectively.
(2) The stroller can be locked at the unfolded or folded state.

Claims (21)

  1. CLAIMS: 1. A foldable stroller comprising a foldable frame, a seat
    disposed on the frame, as well as a plurality of front and rear casters, the frame including a pair of rear-leg side rod sections, a pair of front-leg side rod sections, and a pair of back-frame side rod sections, the front and rear casters being mounted respectively on bottom ends of the front-leg and rear-leg side rod sections, wherein the frame further includes two rear-leg connecting members connected respectively to the back-frame side rod sections, and two knuckles disposed respectiyely on bottom ends of the back-frame side rod sections, the rear-leg side rod sections being connected respectively and pivotally to the back-frame side sections by the rear-leg connecting members, respectively, such that any two adjacent ones of the back-frame side rod sections, the front-leg side rod sections, and the rear-leg side rod sections at one side can be pivoted toward each other, thereby folding the frame.
  2. 2. The foldable stroller as claimed in Claim 1, wherein each of the knuckles includes a first pivot member connected fixedly to the bottom end of a corresponding one of the back-frame side rod sections, and a second pivot member connected to a corresponding one of said rear-leg connecting members and connected pivotally to the first pivot member.
  3. 3. The foldable stroller as claimed in Claim 2, wherein the frame further includes two latch mechanisms each including a first positioning portion disposed at a corresponding one of the second pivot members, and a locking member biased to project from the bottom end of a corresponding one of the back-frame side rod sections to engage the first positioning portion so as to position the corresponding one of the back-frame side rod sections relative to the corresponding one of the second pivot members.
  4. 4. The foldable stroller as claimed in Claim 3, wherein each of the latch mechanisms further includes a second positioning portion disposed at the corresponding one of the second pivot members such that, when the frame is folded, a corresponding one of the locking members engages the second positioning portion.
  5. 5. The foldable stroller as claimed in Claim 3, wherein each of the locking members includes a projection biased to project from a corresponding one of the back-frame side rod sections.
  6. 6. The foldable stroller as claimed in Claim 5, wherein each of the locking members further includes: a body disposed within the corresponding one of the back-frame side rod sections, a corresponding one of the projections extending downwardly from the body, and a rod portion extending upwardly from the body and formed with a guide slot extending in a longitudinal direction thereof and having two closed ends; and each of the latch mechanisms further includes: a guide pin extending through the guide slot in the rod portion of a corresponding one of the locking members and disposed fixedly in the corresponding one of the back-frame side rod sections such that the corresponding one of the locking members is movable within the corresponding one of the back-frame side rod sections along the longitudinal direction, and a compression spring sleeved on the rod portion of the corresponding one of the locking members between the body of the corresponding one of the locking members and the guide pin.
  7. 7. The foldable stroller as claimed in Claim 4, wherein each of the second pivot members is formed with a slide slot having two ends, and the first and second positioning portions are formed respectively at the ends of the slide slot, each of the locking members further including a positioning pin movable within the slide slot in the corresponding one of the second pivot members to engage a selected one of the first and second positioning portion of the slide slot in the corresponding one of the second pivot members.
  8. 8. The foldable stroller as claimed in Claim 7, wherein each of the locking members further includes a body disposed movably within the corresponding one of the back-frame side rod sections, and two p3rallel lugs extending downwardly from the body and flanking the corresponding one of the second pivot members, each of the positioning pins being connected fixedly to the lugs of a corresponding one of the locking members.
  9. 9. The foldable stroller as claimed in Claim 3, wherein each of the latch mechanisms further includes a curved slide slot formed in a corresponding one of the first pivot members, a position-limiting portion, and a sliding rod disposed on a corresponding one of the second pivot members and received movably within the slide slot, each of the slide slots having opposite first and second ends, each of the positionlimiting portions being located adjacent to the second end of a corresponding one of the slide slots for confining a corresponding one of the sliding rods within the second end of the corresponding one of the slide slots, thereby locking the frame in a folded state.
  10. 10. The foldable stroller as claimed in Claim 9, wherein each of the position-limiting portions includes a resilient wall defining a corresponding one of the slide slots, anda projection extending from the resilient wall into the corresponding one of the slide slots for confining a corresponding one of the sliding rods between the projection and a wall of a corresponding one of the first pivot members defining the second end of the corresponding one of the slide slots.
  11. 11. The foldable stroller as claimed in Claim 9, wherein each of the first pivot members includes two spaced-apart circular side plates, each of the second pivot members being disposed pivotally between the circular side plates of a corresponding one of the first pivot members, the slide slot and the position-limiting portion of each of the latch mechanisms being disposed at one of the circular side plates of the corresponding one of the first pivot members.
  12. 12. The foldable stroller as claimed in Claim 2, wherein the rear-leg connecting members have top ends connected respectively to the second pivot members, and bottom ends connected respectively and pivotally to the rear-leg side rod sections such that each of the back-frame side rod sections is pivotable toward and away from a corresponding one of the rear-leg side rod sections.
  13. 13. The foldable stroller as claimed in Claim 2, wherein each of the second pivot members is disposed on a top end of a corresponding one of the front-leg side rod sections, and is connected to a corresponding one of the rear-leg connecting members by a corresponding one of the first pivot members, whereby, the back-frame side rod sections are foldable relative to the front-leg side rod sections, respectively.
  14. 14.The foldable stroller as claimed in Claim 13, wherein each of the rear-leg connecting members includes a receiving tube portion sleeved on a corresponding one of the back-frame side rod sections, and a rear-leg connecting portion connected pivotally to the top end of a corresponding one of the rear-leg side rod sections.
  15. 15. A foldable stroller comprising a foldable frame, the foldable frame including a connecting member, a first rod, a second rod connected to the first rod by the connecting member, and a knuckle including a first pivot member disposed on an end of one of the first and second rods, and a second pivot member disposed on the connecting member and connected pivotally to the first pivot member, the first and second pivot members being pivotable relative to each other so as to convert the first and second rods between unfolded and folded states.
  16. 16. The foldable stroller as claimed in Claim 15, wherein the foldable frame further includes a latch mechanism and a pull cable, the latch mechanism including a first positioning portion disposed at the second pivot member, and a locking member disposed in the first rod and biased to project from the one of the first and second rods to engage the first positioning portion to thereby lock the first and second rods in the unfolded state, the pull cable being connected to the locking member and being operable to remove the locking member from the first positioning portion.
  17. 17.The foldable stroller as claimed in Claim 16, wherein the latch mechanism further includes a second positioning portion disposed at the second pivot member, the locking member being engageable with the second positioning portion to lock the first and second rods in the folded state.
  18. 18.The foldable stroller as claimed in Claim 17, wherein each of the second pivot members is formed with a slide slot having two ends, and the first and second positioning portions are formed respectively at the ends of the slide slot, each of the locking members further including a positioning pin movable within the slide slot in the corresponding one of the second pivot members to to engage a selected one of the first and second positioning portion of the 5lide slot in the corresponding one of the second pivot members.
  19. 19. The foldable stroller as claimed in Claim 16, wherein the latch mechanism further includes a curved slide slot formed in the first pivot member, a position_limiting portion, and a sliding rod disposed on the second pivot member, the position_limiting portion being adjacent to an end of the slide slot so as to position the sliding rod relative to the slide slot, thereby locking the first arid second rods in the folded state when the sliding rod is disposed within the end of the slide slot.
  20. 20. The foldable stroller as claimed in Claim 19, wherein the position_limiting portion includes a resilient wall defining the slide slot, and a projection extending from the resilient wall into the slide slot.
  21. 21.A foldable stroller substantially as hereinbefOre described with reference to and as illustrated in Figures 3 to 17 of the accompanying drawings.
GB0718290A 2006-09-21 2007-09-20 Foldable stroller Active GB2442127B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200620136654 2006-09-21
CNU2007201571621U CN201082719Y (en) 2006-09-21 2007-07-31 Foldable baby carriage

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GB0718290D0 GB0718290D0 (en) 2007-10-31
GB2442127A true GB2442127A (en) 2008-03-26
GB2442127B GB2442127B (en) 2011-08-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010015003A1 (en) * 2008-08-01 2010-02-04 Graco Children's Products Inc. Storage latch and reversible handle for a stroller
CN102211605A (en) * 2010-04-09 2011-10-12 明门香港股份有限公司 Foldable baby bearing device
US8419121B2 (en) * 2008-04-03 2013-04-16 Wonderland Nursery Goods Co., Ltd. High chair

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1469770A (en) * 1973-11-19 1977-04-06 Lamondine Sa Folding chairs
GB2069939A (en) * 1980-01-30 1981-09-03 Kassai Kk Baby carriage
GB2144684A (en) * 1983-07-15 1985-03-13 Kassai Kk Locking mechanism for baby carriage
US4697823A (en) * 1985-07-17 1987-10-06 Aprica Kassai Kabushikikaisha Mechanism for locking opened and closed states of baby carriage
US5511441A (en) * 1992-10-27 1996-04-30 Combi Corporation Locking/unlocking manipulation mechanism disposed on the handlebars of baby carriage
US20030052475A1 (en) * 2001-09-19 2003-03-20 Nobuhide Suga Stroller
US20040245748A1 (en) * 2003-06-09 2004-12-09 Jui-Lu Wang Foldable Stroller

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1469770A (en) * 1973-11-19 1977-04-06 Lamondine Sa Folding chairs
GB2069939A (en) * 1980-01-30 1981-09-03 Kassai Kk Baby carriage
GB2144684A (en) * 1983-07-15 1985-03-13 Kassai Kk Locking mechanism for baby carriage
US4697823A (en) * 1985-07-17 1987-10-06 Aprica Kassai Kabushikikaisha Mechanism for locking opened and closed states of baby carriage
US5511441A (en) * 1992-10-27 1996-04-30 Combi Corporation Locking/unlocking manipulation mechanism disposed on the handlebars of baby carriage
US20030052475A1 (en) * 2001-09-19 2003-03-20 Nobuhide Suga Stroller
US20040245748A1 (en) * 2003-06-09 2004-12-09 Jui-Lu Wang Foldable Stroller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8419121B2 (en) * 2008-04-03 2013-04-16 Wonderland Nursery Goods Co., Ltd. High chair
WO2010015003A1 (en) * 2008-08-01 2010-02-04 Graco Children's Products Inc. Storage latch and reversible handle for a stroller
US8448977B2 (en) 2008-08-01 2013-05-28 Graco Children's Products Inc. Storage latch and reversible handle for a stroller
CN102211605A (en) * 2010-04-09 2011-10-12 明门香港股份有限公司 Foldable baby bearing device

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Publication number Publication date
GB0718290D0 (en) 2007-10-31
GB2442127B (en) 2011-08-31

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