IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0747815
(2007-05-11)
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등록번호 |
US-7717457
(2010-06-10)
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발명자
/ 주소 |
- Bearup, Adam D.
- Hartenstine, Curtis M.
- Zhi-Ren, Zhong
- Zong-Wang, Cui
|
출원인 / 주소 |
- Wonderland Nurserygoods Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
11 |
초록
▼
A spring-assisted fold mechanism for a child's stroller is operable to collapse the stroller frame into a storage configuration upon actuation of a release mechanism controlling the stroller fold latch mechanism. The stroller includes a spring device interconnecting two of the pivotally connected fr
A spring-assisted fold mechanism for a child's stroller is operable to collapse the stroller frame into a storage configuration upon actuation of a release mechanism controlling the stroller fold latch mechanism. The stroller includes a spring device interconnecting two of the pivotally connected frame components to urge the pivotal movement thereof into a collapsed, folded configuration. An anti-fold latch mechanism is associated with the stroller seat to move from an inoperative position into a locking position whenever a child is placed into the stroller seat to prevent the fold mechanism from collapsing the frame of the stroller until the child is removed from the seat. The spring device can be configured as a gas spring, a torsion spring, a compression spring or an elastomeric member that can be stretched to exert a biasing force on the stroller frame to urge movement into the collapsed position.
대표청구항
▼
Having thus described the invention, what is claimed is: 1. A stroller for transporting a child comprising: a frame having front legs and rear legs terminating in ground engaging wheels, and a handle assembly which are pivotally interconnected to permit said frame to be positionable between an expa
Having thus described the invention, what is claimed is: 1. A stroller for transporting a child comprising: a frame having front legs and rear legs terminating in ground engaging wheels, and a handle assembly which are pivotally interconnected to permit said frame to be positionable between an expanded operative configuration and a collapsed storage configuration; and a spring assist mechanism supported on said frame and being operable to bias said frame for pivotal movement into said storage configuration; and an anti-fold latch including a pivotable trap member responsive to a positioning of said child on a seat assembly of said stroller to cause interference between said trap member and at least one selected component of said frame to prevent pivotal movement of said frame from said operative configuration into said storage configuration, said trap member being formed on a seat pan movable into interference with said at least one selected component of said frame, said seat pan being biased upwardly to urge said trap member away from interference with said at least one selected component of said frame. 2. The stroller of claim 1 wherein said frame includes a transverse front cross member extending between said front legs and a transverse rear cross member forming a part of said handle assembly, said trap member being pivoted for movement into interference with said rear cross member to prevent said rear cross member from moving away from said front cross member when a child is located on said seat assembly. 3. The stroller of claim 2 wherein the bias on said seat pan on which the child can be seated when said frame is in said operative configuration urges said trap member upwardly away from engagement with said rear cross member. 4. The stroller of claim 2 wherein said trap member includes a pair of hook members extending downwardly from said seat pan for engagement with said rear cross member, said seat pan being pivotally supported from said front legs and spring-loaded such that a child located on said seat pan causes pivotal movement of said seat pan to move said hook members into an interference position with respect to said rear cross member. 5. The stroller of claim 2 wherein said spring assist mechanism includes a spring member interconnecting two portions of said frame that are closer together when said frame is in said operative configuration than when said frame is in said storage configuration. 6. The stroller of claim 5 wherein said spring member is a gas spring. 7. The stroller of claim 6 wherein said frame includes a transverse front cross member extending between said front legs and a transverse rear cross member forming a part of said handle assembly, said gas spring being centrally positioned on said front and rear cross members. 8. The stroller of claim 2 wherein said spring assist mechanism includes a torsion spring interconnecting two pivotally connected components of said frame and arranged to bias pivotal movement of said frame components toward said collapsed storage configuration. 9. The stroller of claim 2 wherein said spring assist mechanism includes a pair of said torsion springs, one of said torsion springs being located on each side of said stroller in engagement with said handle assembly. 10. The stroller of claim 5 wherein said spring member includes a pair of compression springs mounted in corresponding telescopic tubular members located on opposing sides of said frame. 11. The stroller of claim 5 wherein said spring member includes a pair of laterally spaced elastomeric members that interconnect two frame components such that said elastomeric members are stretched to provide a spring force when said stroller is in said expanded operative position. 12. A stroller for transporting a child comprising: a frame having front legs and rear legs terminating in ground engaging wheels, and an articulated handle assembly which are pivotally interconnected to permit said frame to be positionable between an expanded operative configuration and a collapsed storage configuration in conjunction with the articulation of said handle assembly; a seat assembly pivotally connected to said frame, said seat assembly including a seat pan on which the child can be seated when said frame is in said operative configuration; a latch mechanism operably supported on said handle assembly to secure said frame in said expanded operative configuration, said latch mechanism being selectively releasable to permit said frame to move into said storage configuration; a spring assist mechanism supported on said frame and being operable to bias said frame for pivotal movement into said storage configuration when said latch mechanism is released; and an anti-fold mechanism operatively supported from said frame to be engagable with said frame when a child is located on said seat pan to prevent said frame from moving into said collapsed storage configuration even when said latch mechanism is released, said anti-fold latch including a biased trap member engagable with said frame when a child is located on said seat pan to interfere with pivotal movement of said frame, said trap member being pivotally supported on said seat pan to be movable into engagement with said frame to prevent pivotal movement thereof, said trap member being biased into a raised position that does not engage said frame. 13. The stroller of claim 12 wherein said frame includes a front cross member extending between said front legs and a rear cross member extending between said handle tubes, said trap member having a pair of downwardly extending hook members to be engagable with said rear cross member to interfere with movement of said rear cross member relative to said front cross member when a child is located on said seat pan. 14. The stroller of claim 13 wherein said spring assist mechanism includes a gas spring interconnecting said front and rear cross members and being located beneath said trap member, said gas spring being connected to said rear cross member by a mounting bracket, said hook members being operable to engage said mounting bracket when depressed from said raised position when a child is located on said seat pan. 15. The stroller of claim 12 wherein said frame includes a front cross member extending between said front legs and a rear cross member extending between said handle tubes, said seat pan being pivotally mounted about a forward end thereof and spring-loaded into a raised position such that a rearward end of said seat pan is vertically movable about a generally horizontal pivot axis at said forward end, said trap member including a hook member extending downwardly from said rearward end of said seat pan to be engagable with said rear cross member when said seat pan is pivoted from said raised position in response to a child located on said seat pan. 16. The stroller of claim 15 wherein said spring member includes at least one torsion spring located on each side of said stroller at an articulation pivot in said handle assembly to bias articulation of said handle assembly to pivot said frame toward said collapsed storage configuration. 17. The stroller of claim 15 wherein said seat pan includes a torsion spring mounted at said horizontal pivot axis to bias said seat pan into said raised position. 18. The stroller of claim 15 wherein said seat pan includes a compression spring mounted at said rearward end to be engagable with said rear cross member to bias said seat pan into said raised position. 19. A stroller for transporting a child comprising: a frame having front legs and rear legs terminating in ground engaging wheels, and an articulated handle assembly which are pivotally interconnected to permit said frame to be positionable between an expanded operative configuration and a collapsed storage configuration in conjunction with the articulation of said handle assembly; a seat assembly pivotally connected to said frame, said seat assembly including a seat pan on which the child can be seated when said frame is in said operative configuration; a latch mechanism operably supported on said handle assembly to secure said frame in said expanded operative configuration, said latch mechanism being selectively releasable to permit said frame to move into said storage configuration; and an anti-fold mechanism operatively supported from said seat assembly to be engagable with a frame member when a child is located on said seat pan to prevent said frame from moving into said collapsed storage configuration even when said latch mechanism is released, said anti-fold mechanism including a hook member extending downwardly from said seat pan for engagement with said frame member, said seat pan being pivotally supported from said frame and being spring-loaded upwardly away from said frame member such that a child located on said seat pan causes pivotal movement of said seat pan to move said hook member into an interference position with respect to said frame member. 20. The stroller of claim 19 wherein said frame includes a transverse rear cross member forming a part of said handle assembly, said anti-fold mechanism including a pair of hook members extending downwardly from said seat pan for engagement with said rear cross member, said seat pan being pivotally supported from said front legs and spring-loaded such that a child located on said seat pan causes pivotal movement of said seat pan to move said hook members into an interference position with respect to said rear cross member. 21. The stroller of claim 20 further comprising a spring assist mechanism supported on said frame and being operable to bias said frame for pivotal movement into said storage configuration when said latch mechanism is released. 22. The stroller of claim 19, wherein said handle assembly includes a pair of handle tubes connected at an upper portion thereof to form a handle bar, said front legs, rear legs and handle assembly being pivotally interconnected to permit said frame to be positionable between an expanded operative configuration and a collapsed storage configuration, and said latch mechanism comprises: a housing operably supported on said handle assembly; a pair of latch members operably mounted to secure said frame in said expanded operative configuration; and a latch actuation mechanism mounted on the handle bar and being coupled with the latch members to affect movement thereof between a latched position and an unlatched position, said latch actuation mechanism including a pair of interengaged gears rotatably mounted in said housing for rotation about corresponding laterally spaced axes of rotation, said latch actuation mechanism including a lever connected directly to one of said gears and extending radially with respect to said one of said gears to project outwardly of said housing to allow engagement thereof to affect rotational movement of said one of said gears and the other of said gears through the engagement thereof with said one of said gears, thereby causing a corresponding movement of said latch members. 23. The stroller of claim 22 wherein manipulation of said one of said gears having said lever extending therefrom affects rotation of said one gear and, due to the interengagement of the gears, the rotation of the other said gear, each said gear being connected to the corresponding said latch member such that the rotation of each said gear causes a movement of the corresponding said latch member. 24. The stroller of claim 23 further comprising a secondary latch mounted on said housing and being cooperable with said latch actuation mechanism to prevent movement of said latch members unless said secondary latch is previously actuated. 25. The stroller of claim 24 wherein said secondary latch is movable between a locked position in which said latch actuation mechanism cannot be operated and an unlocked position in which said latch actuation mechanism is free to move, at least one of said gears being formed with an abutment engagable with said secondary latch when in said locked position. 26. The stroller of claim 25 wherein said secondary latch is formed as a spring-loaded button mounted in said housing, said button having a protrusion positionable in an interfering engagement with said abutment on said one gear, said button being depressible into said housing to displace said protrusion from interference with said abutment. 27. The stroller of claim 26 further comprising: a spring assist mechanism supported on said frame and being operable to bias said frame for pivotal movement into said storage configuration when said latch mechanism moves said latch members into said unlatched position. 28. The stroller of claim 27 further comprising: a seat assembly supported from said frame on which a child can be seated when said frame is in said operative configuration; and an anti-fold latch operatively associated with said seat assembly to prevent pivotal movement of said frame from said operative configuration into said storage configuration when the child is located on said seat assembly.
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