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Patent Information & Production OptionsBaby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold · Patent CN207644442U

Patent CN207644442U: bibliographic data, legal status, family, a plain-language reading of the claims, plus customization, US compliance points and how a manufacturing project runs.

At a glance

Patent numberCN207644442U (application CN201720919046)
TypeChina utility model (实用新型) - protects product shape and structure
Original titleSeat can be with the baby-carrier framework of adjustment direction (座椅可以调整方向的婴儿车骨架)
Patent ownerShanghai Le Ruiying Ltd, Zhongshan Lemeida Baby Products Co ltd
InventorsHuang Kaiyu
Filing date2017-07-26
Grant date2018-07-24
Status (China)Withdrawn - the owner actively abandoned the patent right (effective 2023-06-02)
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited by6 later documents
SourceGoogle Patents (search for CN207644442U)

What the claims cover, in plain language

Claim 1 - A baby stroller frame (0) comprising a first supporting rack (1) with at least one first wheel (11) at its lower end; a second supporting rack (2) rotationally connected at its upper end to the upper end of the first rack, with at least one second wheel (21) at its lower end; a seat support base (3) that moves back and forth along the first rack and sits at its upper end when unfolded; a seat (5) pivotally connected at its lower end to the seat support base; a control handle (51) connected to the seat; and a fold control mechanism (14) that moves the seat and seat support base down the first rack so the second rack pivots toward the first rack to fold.

Claim 2 - Adds a coupled frame (4) rotatably connected between the seat support base (3) and the second supporting rack (2) to drive the fold. Claim 3 - The folded frame stands on the first wheels (11) and one end of the seat (5). Claim 4 - Two first wheels and two parallel first racks, allowing the folded frame to stand on both wheels. Claim 5 - In the unfolded state the first racks are beside the control handle; in the folded state the seat, handle and second rack overlap partly on the first rack. Claim 6 - A second locking mechanism (12) and the fold control mechanism (14) interlock so the second locking mechanism unlocks for folding and auto-locks when the frame reaches the vertical use state. Claim 7 onward - Further details on the placement of the second locking mechanism between the first and second racks.

This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.

What this means for US production

This patent was filed only in China and has been withdrawn (the owner actively abandoned the right effective 2023-06-02), so it no longer restricts anyone in China either. It has no US or other foreign counterpart.

Two points to settle early:

  • Other patents may exist. Baby stroller folding mechanisms and reversible-seat linkages are heavily patented worldwide. Kombi Co., Ltd. holds later foreign filings citing this document (e.g., WO2025069294A1), indicating active patenting in this field by other companies. A freedom-to-operate (FTO) review covering slide-to-fold linkages and auto-locking joints is essential before tooling.
  • Structural load paths. The seat support base slides under the child’s weight; tube wall thickness, joint materials and pivot pin diameters must be confirmed on prototypes to meet durability cycles.

Customization and manufacturing

What can be customized

AreaOptions
Frame materialAluminum alloy or steel tubes, to be confirmed in design
Wheel sizeDiameter and tread set in design / confirmed on prototypes
Seat fabricRemovable covers, padding thickness, colorways
Handle heightTelescoping or fixed positions, set in design
Locking feelSpring tension for the fold control mechanism and seat rotation
BrandingLaser etching, riveted badges or molded logos on plastic caps

Things to plan for (US market)

  • CPSC 16 CFR 1227 / ASTM F833 - Standard consumer safety specification for carriages and strollers sold in the US; covers latching, locking, stability, scissor points and dynamic load tests.
  • California Proposition 65 - Plastics, paints and metal finishes must be screened for listed substances.
  • CPSIA Section 101 - Lead content limits in substrate and surface coatings for children’s products.
  • Tracking labels - Mandatory permanent markings identifying the manufacturer, date and batch.

How a project runs

  1. Inquiry - Target market, required standards, quantities and desired features.
  2. Design - Tube bending profiles, joint geometry, coupled-frame link lengths and locking mechanisms.
  3. Prototype - Samples built for fold-action verification, standing balance and seat-rotation checks.
  4. Testing - Third-party lab evaluation against ASTM F833 and applicable chemical rules.
  5. Production - Tube cutting, bending, welding or riveting, powder coating, plastic injection molding for joints, fabric sewing and final assembly.

Quantities & timeline

Tube bending dies, welding jigs and plastic injection molds for the joints and locking housings are needed for each frame size. Certification testing against ASTM F833 requires multiple samples and takes several weeks depending on lab schedules. Send us your target market, required standards, estimated quantity, preferred materials and any specific features and we will reply with options.

Patent drawings

Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 1
Fig. 1 - Side schematic view of the stroller frame embodiment.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 2
Fig. 2 - Front left perspective schematic view of the stroller frame embodiment.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 3
Fig. 3 - Schematic diagram of two change modes of the second locking mechanism and fold control mechanism.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 4
Fig. 4 - Connection diagram of the seat support base and the lower end of the seat.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 5
Fig. 5 - Connection diagram of the seat support base and the coupled frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 6
Fig. 6 - Transmission schematic diagram of the seat support base and the coupled frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 7
Fig. 7 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 8
Fig. 8 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 9
Fig. 9 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 10
Fig. 10 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 11
Fig. 11 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 12
Fig. 12 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 13
Fig. 13 - Additional schematic view of the stroller frame.
Baby Stroller Frame with Direction-Adjustable Seat and One-Hand Fold - Patent Fig. 14
Fig. 14 - Additional schematic view of the stroller frame.

Drawings reproduced from the public patent document for reference.

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This page is based on the public patent document CN207644442U, assigned to Shanghai Le Ruiying Ltd, Zhongshan Lemeida Baby Products Co ltd. IP2M is an independent manufacturing service and is not affiliated with, endorsed by or licensed by the patent owner. Images marked as concept renderings are illustrations, not photos of an existing product. Patent status information is provided for reference only and is not legal advice; confirm freedom to operate for your market before production. Full disclaimer.