IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0212157
(2002-08-06)
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발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
10 |
초록
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A foldable stroller has a handle and a primary frame consisting of both a front and a rear member. The handle can be folded to reduce the width of the stroller for storage purposes. When the handle is folded, lateral tubes of the handle are unlocked so that the handle can be moved close to the frame
A foldable stroller has a handle and a primary frame consisting of both a front and a rear member. The handle can be folded to reduce the width of the stroller for storage purposes. When the handle is folded, lateral tubes of the handle are unlocked so that the handle can be moved close to the frame and thereby reduce the height of the stroller. The members of the frame are pivoted on each other so as to reduce the length of the stroller when the stroller is folded. A force exerted on the handle and on the members of the frame can be imparted to each other via an operating rod combination pivoted to the frame so that the pivotally connected parts can be moved close to each other with increased smoothness of the folding process.
대표청구항
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1. A foldable stroller, comprising(a) a primary frame including:i. a front support member having two parallel rods,ii. a handle, the handle having two parallel lateral tubes, two bent tubes, and a joining member; the bent tubes being connected to an upper end of a respective one of the lateral tubes
1. A foldable stroller, comprising(a) a primary frame including:i. a front support member having two parallel rods,ii. a handle, the handle having two parallel lateral tubes, two bent tubes, and a joining member; the bent tubes being connected to an upper end of a respective one of the lateral tubes at one end; the bent tubes being each provided with an engaging member at other end; the engaging members being pivoted to two ends of the joining member; the joining member having a locking part separately engaging the engaging members to lock the bent tubes in stretched position; the joining member having a button depressible to make the locking part separate from the engaging members to allow the handle to be folded; the engaging members are connected to a pulling spring to bias the bent tubes towards each other when the locking part is disengaged from the engaging members; front wheels being fitted to lower ends of the front support member having two parallel rods; the button being turnable between an unlocked position where said button can be depressed and a locked position where said button can't be depressed, thus preventing the handle from being folded by accident;iii. a pair of first connecting members, the first connecting members being disposed at the lateral tubes;iv. a rear support member that includes, two parallel rods that are pivoted to the first connecting members at upper ends; rear wheels fitted to lower ends of the parallel rods of said rear support member;v. a pair of front joining members, the front joining members each having a locking combination, and a connecting part; upper ends of the front support member having two parallel rods being connected to the connecting parts; lower ends of the lateral tubes of the handle being connected to the locking combinations; the locking combinations being separated from the connecting parts when the lateral tubes turn about their longitudinal axes due to folding of the handle, thus allowing the lateral tubes to be moved close to the front support rods;(b) a seating frame shaped to support a seat and a back; the seating frame pivotally connected to intermediate portions of the front support member having two parallel rods at front portions of said rods thereof; the seating frame having branch extension sections extending beyond the rear support rods of the rear support member, and being pivotally connected to the intermediate portions of the rear support rods;(c) an operating rod combination, the operating rod combination having a pair of first connecting rods, and a co-moving rod; the connecting rods being pivotally connected to each other at intermediate portions; front ends, and rear ends of the connecting rods being pivotally connected to front ends of the seating frame, and lower ends of the rear support rods of the rear support member respectively; two ends of the co-moving rod being connected to one of the first connecting rods, and pivotally connected to a foldable footrest respectively; and,(d) an auxiliary operating rod combination, the auxiliary operating rod combination having a pair of second connecting rods, and a pair of curved rods; the second connecting rods being pivoted pivotally connected to each other at inner ends; the second connecting rods being pivotally connected to a respective one of the rear support rods at outer ends; the curved rods being pivotally connected to intermediate portions of the second connecting rods at first ends; the curved rods being pivotally connected to the branch extension sections of the seating frame at other ends; part of a force applied to the handle being imparted to the rear support rods of the rear support member, the seating frame, and the front support member having two parallel rods via the operating rod combination as well as the auxiliary operating rod combination for helping said auxiliary operating rods move close to each other in folding operation. 2. The foldable stroller of claim 1, wherein the joining m ember includes:(a) a housing having an upper part, and a lower part; the upper housing part having a holding hole;(b) the button having engaging projections projecting laterally from an outer side; the button being moveably passed through the holding hole of the upper housing part;(c) said locking part having two engaging ends and being disposed at a bottom of the button;(d) a control base, the control base having two opposing elongated gaps on annular walls thereof; the control base being fixed to the bottom of the upper housing part with the engaging ends of the locking part projecting outwardly from the elongated gaps; the locking part being biased up to an upper end of the control base by a spring; the engaging projections of the button constrained by the tops of the annular walls from moving down when the button is in a locked position; the engaging projections in apposition with the elongated gaps between the annular walls so that the button is in an unlocked position and can be depressed to move the locking part down to a lower end of the control base; and,the engaging members of the handle have unlocking trenches having upper sections, and lower sections longer than the upper sections; the engaging ends of the locking part being received in the upper sections of the unlocking trenches to engage the engaging members when positioned in the upper end of the control base; the engaging ends of the locking part being received in the lower sections for allowing the bent tubes of the handle to be pivoted on the joining member when positioned in the lower end of the control base; thus the bent tubes can be pivoted on the joining member by depressing the button that has been turned to the unlocked position. 3. The foldable stroller of claim 1, wherein the first connecting members have connecting tubes at upper ends, and engaging members at lower ends; the connecting tubes having connecting extension portions for insertion sections of lower ends of a canopy support to be connected thereto; the engaging members having opposing engaging protrusions on inner sides, and being affixed to the lateral tubes of the handle with the protrusions being fitted into engaging holes of the lateral tubes. 4. The foldable stroller of claim 1, wherein the locking combinations each has a pushing block, an engaging block, and a fixed block; the pushing blocks being fixedly fitted around the lateral tubes of the handle; the pushing blocks having lower extension portions having sloping edges; the engaging blocks being movably fitted around the lateral tubes under the pushing blocks; the engaging blocks having upper recessed portions having sloping edges separably faced with the sloping edges of the pushing blocks; the engaging blocks having hooking portions extending upwards to reversibly engage hooking protrusions of the connecting parts that extend downwards; the engaging blocks being biased up with elastic elements to contact the pushing blocks; the fixed blocks being pivoted to the connecting parts and connected to lateral curved slots of lower ends of the lateral tubes by shafts so that the pushing blocks depress the engaging blocks so as to disengage the hooking protrusions when the lateral tubes are rotated in folding the handle, allowing the lateral tubes to be pivoted on the connecting parts. 5. The foldable stroller of claim 2, wherein the upper housing part has two pairs of stopping walls projecting down from a bottom side; stopping walls of each of the pairs having a gap in between for allowing the engaging ends of the locking part to be passed through. 6. The foldable stroller of claim 2, wherein the spring is fitted around a locating protrusion of a lower side of the locking part at an upper end, and is fitted around a locating protrusion of the control base at a lower end. 7. The foldable stroller of claim 2, wherein the control base has holed connecting ears sticking sideways from the annular walls, and is secured to the upper housing p art with bolts being passed through the connecting ears and screwed into corresponding holes of the connecting poles of a bottom side of the upper housing part. 8. The foldable stroller of claim 2, wherein a pair of co-moving plates are pivoted to a respective one of the engaging members at first ends; the co-moving plates are pivoted to fixing pins used for positioning two ends of the pulling spring at second ends so that the plates are arranged in a crossing manner, and part of force of the pulling spring is imparted to the engaging members via the co-moving plates to help the handle to be folded; the co-moving plates having curved recesses on lateral sides on portions thereof that will contact joints of both the upper housing part and the lower housing part during the process of folding. 9. The foldable stroller of claim 1, wherein the foldable footrest is positionally adjustable. 10. The foldable stroller of claim 1, wherein the rear branch extension sections extending beyond the rear support rods of the rear support member of the seating frame are connected to a basket so that the basket is held in position. 11. The foldable stroller of claim 1, wherein the handle is provided with hanging knobs on rear sides for allowing objects to be hung on said hanging knobs. 12. The foldable stroller of claim 1, wherein the handle is provided with hanging knobs on rear sides for allowing objects to be hung on said hanging knobs, and the parallel rods of the rear support member are provided with lock elements so that the handle can be kept close to the rear support member without a possibility of said handle moving away from said rear support member when the stroller is in folded position by connecting the lock elements to the hanging knobs. 13. The foldable stroller of claim 1, wherein a front extension member is connected to the front support rods at two ends, and is held in position by a pair of support plates, which are pivotally connected to the front extension member at first ends, and to the seating frame at second ends. 14. The foldable stroller of claim 4, wherein the connecting parts of the front joining members have a concavely curved shape at front edges, and a front extension member having a convexly curved shape at two ends is connected to the front support rods to abut the concavely curved edges of the connecting parts from the convexly curved ends thereof.
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