At a glance
| Patent number | CN206101908U (application CN201621162675) |
| Type | China utility model (实用新型) - protects product shape and structure |
| Original title | Detachable case and bag wheel subassembly (可拆卸式箱包轮组件) |
| Patent owner | Individual |
| Inventors | Mei Xianyao |
| Filing date | 2016-10-25 |
| Grant date | 2017-04-19 |
| Status (China) | Lapsed - terminated for non-payment of annual fees (recorded 2019-10-18) |
| Patent family | Chinese filings only - no US, European, Japanese, PCT or other filings listed |
| Cited by | 6 later documents |
| Source | Google Patents (search for CN206101908U) |
What the claims cover, in plain language
Claim 1 - a detachable case and bag wheel assembly comprising a card (100) and a pivot (200). Between the card and pivot there is a locking state, a disassembly state, and a relative displacement state. The locking state and disassembly state convert into each other through the relative displacement state.
Claim 2 - the card has a hole clipping (110) into which the pivot inserts. The pivot has a card slot space (210), and the card has a receiving part (120) that inserts into the card slot space. Claim 3 - an upper gear junction (121) on the receiving part coincides with the lower perspective plane of the card slot space. Claim 4 - the lower perspective plane of the receiving part coincides with the upper surface (211) of the card slot space. Claim 5 - includes a case and bag connecting seat (300) and a wheel carrier (400). The seat has a through hole (310) and a slot (320). The card moves in a straight line relative to the slot, and the pivot moves in a straight line relative to the through hole. Claim 6 - an elastic restoring force exists between the card and the connecting seat. Claim 7 - includes a protective cover (500) fixed to the connecting seat by screws. Claim 8 - the card has a limit chute (130), and the protective cover has a slider (510) inserted into the limit chute. Claim 9 - includes an axle sleeve mold insert with an annular groove on its outer surface, arranged in the through hole. Claim 10 - the pivot’s lower end has an annular groove (220); the pivot assembles to the wheel carrier via a pin (600) fixed by screws.
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 is lapsed, 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. Detachable and quick-release luggage wheels are an active engineering area. For example, G.T. Line S.R.L. holds a later international filing (WO2019030783A1) citing this document, indicating ongoing development in removable wheel systems. A freedom-to-operate (FTO) review of the specific card-and-pivot geometry and any alternative quick-release mechanisms is recommended before tooling.
- Load rating and fatigue. The dimensions of the card, pivot, and receiving part determine how much weight the wheel can bear. Material selection and wall thicknesses must be set in design and confirmed on prototypes to withstand repeated drops and rolling impacts.
Customization and manufacturing
What can be customized
| Area | Options |
|---|---|
| Roller size | Diameter and width to be confirmed in design based on bag capacity |
| Materials | Plastic types for the card, pivot, and wheel carrier; rubber or polyurethane for the roller tread |
| Elastic element | Spring type and force for the restoring mechanism between the card and seat |
| Mounting interface | Hole pattern on the connecting seat to match specific luggage shell molds |
| Cover styling | Shape, texture, and screw placement on the protective cover |
| Colors | Pigmentation for visible components like the cover and wheel carrier |
Things to plan for (US market)
- CPSC regulations - while luggage is not a children’s product, if the bags are marketed for kids, they fall under CPSC tracking label rules and may require testing for lead and phthalates.
- California Proposition 65 - plastics, pigments, and metal pins used in the assembly must be screened for listed chemicals if sold in California.
- ASTM F963 - if the detachable wheel or its components are small enough to be considered a choking hazard and the bag is intended for children under 12, toy safety standards may apply to the removable parts.
How a project runs
- Inquiry - bag dimensions, target load, roller diameter, and estimated volumes.
- Design - CAD modeling of the card, pivot, connecting seat, and protective cover to ensure smooth engagement and clearance.
- Prototype - 3D printed or machined samples to test the sliding action, elastic return, and locking stability.
- Pilot run - injection molds opened for the plastic parts; drop tests and rolling fatigue tests performed on assembled units.
- Production - mass injection molding, pin insertion, screw fastening, and final assembly into packaging.
Quantities & timeline
The card, pivot, connecting seat, protective cover, and wheel carrier each require dedicated injection molds. The pin and screws are standard hardware, but the axle sleeve mold insert needs precise machining. Rolling fatigue and drop testing take several weeks to complete. Send us your bag dimensions, target load, roller size, material preferences, quantity and target price and we will reply with options.
Patent drawings
Drawings reproduced from the public patent document for reference.
