Patent CN208746142U
Updated November 5, 2026Telescopic Umbrella Holder Integrated into Bicycle Handlebar Stem
Standard bike baskets and frame-mounted holders often add clutter, wobble in the wind, or interfere with steering. This design solves those issues by building the umbrella mount directly into the existing handlebar stem. A telescopic rod extends upward from the center of the stem, supporting the umbrella at an adjustable height. At the top, a spring-loaded collet clamps the umbrella handle or shaft. The collet’s opening size is adjustable via a knob or hasp, making it easy to swap umbrellas. Because the mount shares the stem’s structural integrity, it remains rigid and aligned with the front wheel, offering a clean, integrated look without extra brackets or straps.
- China utility model - lapsed
- No filings outside China
- Cycling accessories
- Telescopic rod, adjustable collet, stem integration
Splat! What let you down?
🚲
Stem Integration
The holder mounts inside the handlebar stem tube, replacing external brackets.
📏
Telescopic Height
Multi-layer nested rods allow the umbrella position to adjust for rider height.
🔒
Adjustable Collet
A spring-loaded clamp grips the umbrella handle or shaft with adjustable tension.
🛡️
Anti-Slip Design
Internal grooves and stops prevent the rod from pulling out completely during use.
Bring this product to market
- ✓ Patent review Patent family and legal status reviewed in the relevant jurisdictions.
- 2 Product brief · now How it works, uses and options written up
- 3 Prototype First samples for buyers to review
- 4 Pilot run Small first batch for launch customers
- 5 Volume production Repeat orders at scale
Buyer interest
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The problem
Riders who want protection from sun or rain often rely on bulky frame-mounted holders or basket clips. These add-ons can vibrate, loosen over time, or block view and steering clearance. They also require separate installation points, which may not exist on modern minimalist frames. A cleaner solution is needed—one that uses the existing strength of the handlebar stem to support an umbrella securely, without adding visual clutter or compromising handling.
The solution
- Modified Stem Structure: The handlebar stem is adapted to house a telescopic rod internally. For stems with a top-mounted bolt, the mounting surface is shifted downward to reserve space for the holder assembly.
- Telescopic Rod: A support rod, consisting of one or more nested layers, fits inside the stem’s hollow tube. It can be pulled up to extend the umbrella’s height.
- Fastening Mechanism: A telescopic fastener (such as a V-type spring leaf or knob) locks the rod in place relative to the stem, preventing it from sliding back down.
- Collet Clamp: At the top of the rod sits a collet—a fixture with a vertical cylindrical opening. This opening adjusts in size to grip either the umbrella handle or the shaft.
- Adjustment Part: A regulating component (like a knob or hasp) controls the collet’s tightness, allowing the user to insert or remove the umbrella easily.
- Safety Stops: Anti-slip structures, such as internal grooves and caliber changes, ensure the rod cannot be fully extracted from the stem accidentally.
Who it is for
- Urban Commuter Brands: Companies looking to offer all-weather bikes with integrated accessory solutions rather than aftermarket add-ons.
- Bike Accessory Manufacturers: Makers of cycling gear seeking to expand their range with structural components that attach to standard stems.
- E-Bike Producers: Electric bicycle manufacturers who need streamlined designs where external clutter is undesirable due to battery and motor placement.
- Custom Builders: Shops that modify stems to accommodate specific customer needs for weather protection without altering the frame geometry.
How it works
The main parts
| No. | Part | What it does |
|---|---|---|
| 1 | Stem | The base component connecting handlebars to the fork; modified to house the rod. |
| 2 | Telescopic Rod | Nested tubes that extend upward to raise the umbrella position. |
| 3 | Telescopic Fastener | Locks the rod at the desired height; examples include spring leaves or knobs. |
| 4 | Collet | The clamp at the top of the rod that holds the umbrella handle or shaft. |
| 5 | Regulating Part | Adjusts the collet’s opening size for insertion/removal and tightening. |
| 6 | Anti-slip Structures | Grooves and stops inside the rod/stem interface to prevent full extraction. |
Operating steps
- Insert Umbrella: Loosen the regulating part to open the collet. Place the umbrella handle or shaft into the cylindrical opening.
- Tighten Clamp: Turn the regulating part to close the collet around the umbrella, securing it firmly.
- Extend Height: Pull the telescopic rod upward from the stem. Adjust to the preferred height for shade or rain coverage.
- Lock Position: Engage the telescopic fastener to fix the rod’s position relative to the stem.
- Ride: The umbrella stays aligned with the front wheel, supported by the stem’s rigidity.
- Retract/Remove: Release the fastener, push the rod down, and loosen the collet to remove the umbrella.
Applications
Urban commuting
Commuters using public transit or walking short distances benefit from a compact umbrella mount that doesn’t interfere with folding or storage when not in use.
Recreational cycling
Weekend riders on paved paths can keep hands free and maintain balance better with an umbrella centered above the handlebars rather than offset to one side.
Delivery and courier work
Couriers working in variable weather need reliable shade or rain protection that withstands frequent stops and starts without loosening.
Family and child transport
Parents riding with children can adjust the umbrella height to cover both rider and passenger seat area effectively.
Where it is less suitable
- Mountain Biking: Rough terrain and high vibration may exceed the holding capacity of a lightweight umbrella setup.
- High-Speed Racing: Aerodynamic drag from an extended umbrella would significantly impact performance.
- Heavy Rain Storms: Most umbrellas are not designed for sustained heavy downpours while moving at speed; this holder supports the umbrella but does not improve its weather rating.
Patent & Production
At a glance
| Patent number | CN208746142U (application CN201821164868) |
| Type | China utility model (实用新型) - protects product shape and structure |
| Original title | Built-in Telescopic Umbrella Folder for Stem (内置于车把立管的可伸缩伞夹) |
| Patent owner | Individual |
| Inventors | Chen Nian, Zhao Lina |
| Filing date | 2018-07-23 |
| Grant date | 2019-04-16 |
| Status (China) | Lapsed - terminated for non-payment of annual fees (recorded 2021-07-06) |
| Patent family | Public record shows Chinese filings only - no US, European, Japanese, PCT or other filings listed |
| Cited by | 1 later document |
| Source | Google Patents (search for CN208746142U) |
What the claims cover, in plain language
Claim 1 - a telescopic umbrella folder built into a stem, comprising a stem, telescopic rod, telescopic fastener, collet, and clamping opening regulating part. The stem transfers direction from handlebars to the front fork. The telescopic rod is a support rod located inside the stem’s tubular structure, pullable for use. The fastener fixes the rod’s position after extension. The collet is fixed to the top of the rod, with an adjustable opening size for clamping the umbrella handle or stem. The regulating part adjusts and fixes the collet’s opening size.
Claim 2 - details the modification of the stem: for stems with top-mounted handle bolts, the mounting surface is moved to a bottom angle to reserve a hollow circular tube at the top for the umbrella folder.
Claim 3 - describes the telescopic rod as a single or multi-layer nested structure, allowing different mounting heights to adapt to vehicle seat height and user preference.
Claim 4 - specifies anti-slip structures between the rod and stem, or between rod layers, such as non-slip grooves and caliber changes, to prevent complete extraction.
Claim 5 - lists common telescopic fasteners like knob bolts, V-type spring leaves, and pipe clamps.
Claim 6 - defines the collet as having a vertical elongated cylindrical clamping opening, composed of an elastic backing, a clamp fixed to the rod, a mobilizable clamp holder, and a connecting shaft.
Claims 7-11 - detail the elastic backing material, the horizontal/vertical split of the clamp and holder, the rotation of the holder around the connecting shaft, and the types of regulating parts (knobs, hasps).
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 in China and has lapsed due to non-payment of annual fees, so it no longer restricts anyone in China. The public record shows no US or other foreign counterpart.
Two points to settle early:
- Other patents may exist. Bicycle accessories and stem-integrated mounts are a competitive field. While no foreign patents citing this one were found, independent US or international patents covering similar telescopic stem mechanisms or collet designs may exist. A freedom-to-operate (FTO) review is recommended before mass production.
- Structural Integrity. Since the stem is modified to house the rod, the load-bearing capacity of the stem must be verified against safety standards for bicycles.
Customization and manufacturing
What can be customized
| Area | Options |
|---|---|
| Rod Layers | Single-layer or multi-layer nesting for different height ranges |
| Fastener Type | Knob bolt, V-type spring leaf, or pipe clamp based on user preference |
| Collet Material | Glass-filled nylon for durability; aluminum for weight savings |
| Opening Size | Adjustable range to fit various umbrella handle diameters |
| Finish | Anodized aluminum, powder-coated steel, or raw machined surfaces |
| Mounting Interface | Adaptation for top-bolt or side-clamp stem configurations |
Things to plan for (US market)
- CPSC Safety Standards: While bicycles themselves are regulated under 16 CFR 1512, accessories attached to the steering column must not compromise structural integrity or control.
- ISO 4210: International standard for bicycle safety requirements; relevant if exporting globally or aligning with US importer expectations.
- Material Compliance: Ensure plastics used in the collet and fasteners meet any applicable chemical restrictions for consumer products.
How a project runs
- Inquiry - Define stem compatibility, umbrella diameter range, and target height adjustment.
- Design - CAD modeling of the internal rod mechanism, collet geometry, and stem modification.
- Prototype - 3D-printed functional samples to test telescoping action and clamp retention.
- Testing - Impact tests on the stem junction; fatigue tests on the spring/fastener mechanism.
- Production - Injection molding for plastic parts; machining/extrusion for metal rods and stems; assembly.
Quantities & timeline
Tooling for the collet and fastener components requires precision injection molds. Metal rods may use extruded aluminum profiles cut to length. Assembly involves screws, snap-fits, and rivets depending on the chosen fastener type. Send us your stem specifications, umbrella handle sizes, and quantity targets and we will reply with options.
Production notes
Tooling and process
Likely processes include glass-filled nylon injection molding for the collet and fastener components, and aluminum extrusion for the telescopic rods. Stamping may be used for spring leaves or thin metal brackets. Heat treatment might be applied to aluminum parts for added strength.
Cost drivers
Costs are typically driven by the number of molds required for the complex collet geometry and the precision machining of the nested tubes. Weight is a critical factor; lighter materials increase cost but improve usability. Fastener count affects assembly time.
Prototyping path
Prototypes typically start with 3D-printed parts to verify the telescopic action and collet fit. Move to machined frames for structural testing. Create impact test samples to ensure the modified stem holds up under stress. Finally, produce functional samples with molded parts.
What we would change before tooling
We would likely refine the wall thickness and joint design of the plastic collet to prevent cracking. Thread engagement on the regulating knob should be optimized for torque resistance. Spring rate consistency for the V-type fastener needs verification.
Common failure points
Potential failures include cracking under impact at the stem junction, bolts loosening due to vibration, UV degradation of plastic parts, and spring fatigue leading to loss of locking force. Edge hardness and wear on the sliding tubes could cause binding.
Patent drawings
Drawings reproduced from the public patent document for reference.
Frequently asked questions
Does this replace my current stem?
Not necessarily. The patent describes modifying existing stems (specifically those with top-mounted bolts) to create space for the internal rod. Alternatively, new stems can be manufactured with the integrated channel. Compatibility depends on the specific stem geometry.
How much weight can the holder carry?
The patent does not specify a maximum load rating. Capacity depends on the material of the telescopic rod and the strength of the collet clamp. Standard golf-size or compact travel umbrellas are typically supported by such mechanisms.
Can I adjust the umbrella height?
Yes. The telescopic rod consists of nested layers that can be pulled up or pushed down. A fastener (like a knob or spring clip) locks the rod at the desired height. This allows adaptation to different rider heights and seating positions.
Is it difficult to put the umbrella in?
No. The collet has an adjustable opening controlled by a regulating part (e.g., a knob). You loosen it to insert the umbrella handle or shaft, then tighten it to secure the umbrella. No tools are required for daily use.
Will it vibrate loose while riding?
The design includes anti-slip structures and fasteners intended to hold the rod steady. However, vibration resistance depends on the quality of the fastener mechanism and proper installation. Regular checks are recommended.
Which umbrella handles fit?
The collet opening is adjustable, so it can accommodate a range of handle or shaft diameters. Specific minimum and maximum diameters are set in design and confirmed on prototypes.
Can this design be made and sold in the US?
The patent was filed in China and has lapsed, and the public record shows no US counterpart, so it does not restrict the design in the US or in China. Bicycle accessories may be covered by other US patents - see Patent & Production - so we recommend a freedom-to-operate check before volume production.
Are you affiliated with the patent owner?
No. IP2M is an independent design and manufacturing service working from the public patent document.
Request a quote
Click Request a Quote below to see our email address - copy it, or open your email app with a ready-made message. Please mention patent CN208746142U in the subject.
Helpful details to include:
- Your company and channel (bike brand, accessory maker, custom builder)
- Stem type (top-bolt, side-clamp, etc.) and dimensions
- Umbrella handle/shaft diameters you need to support
- Target height range for the telescopic rod
- Estimated quantity and target price
- Timeline - when you would like samples and the first shipment
You can also reach us at (332) 203-9997.
Page editor: Emily Zhang, Product Editor · IP2M
Last updated November 5, 2026. If something on this page looks wrong, email [email protected] and we will check it against the patent.
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This page is based on the public patent document CN208746142U, assigned to Individual. 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.