Hair Dryer Nozzle with Airflow-Driven Swing Member

Patent & Production

At a glance

What the claims cover, in plain language

Claim 1 defines a nozzle comprising a housing with an air duct. Key features include a swing member rotatably fixed on the housing, positioned in the airflow path to deflect it. Crucially, the housing has multiple air inlet holes penetrating its walls. These holes allow external air to enter the duct, converge with the blower’s air, and form the airflow path that drives the swing member. The swing member is located downstream of these inlets.

Claim 2 specifies that the oscillation is passive, driven solely by the air flow. Claims 3-5 describe a two-part housing structure: a first housing (inner duct) and a second housing (outer shell). The first housing may have a converging section to accelerate air. The second housing encloses the swing member and first housing, providing stability. Claims 6-8 detail the placement of air inlet holes on the side walls of either or both housings, and the formation of an air flow channel between the housings to guide external air inward. Claim 9 describes the swing member’s construction: a cover body with a rotating shaft and two swing arms positioned on either side of the airflow path. Claim 10 covers the complete hair dryer assembly including this nozzle.

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 is currently in force. Making or selling this specific configuration in China requires the owner’s permission. However, the public record shows no US counterpart. Therefore, this Chinese patent does not restrict manufacturing or sales in the United States based on this document alone.

Two practical questions should be settled early:

• Other patents may exist. Hair dryer attachments are a crowded field. While this specific passive-swing mechanism appears unique in this filing, prior art on oscillating nozzles, venturi-effect attachments or dual-housing structures may belong to major appliance manufacturers. We recommend a freedom-to-operate (FTO) review before tooling.
• Mechanical Tolerances. The effectiveness of the passive swing depends heavily on the precision of the rotating shaft and the angle of the swing arms. Variations here can stop the oscillation or cause jamming.

Customization and manufacturing

What can be customized

Things to plan for (US market)

• UL 859 / IEC 60335: Safety standards for household electric appliances. Even though the nozzle is plastic, it attaches to a mains-powered device, so material flammability ratings (e.g., UL94 V-0) are critical.
• FDA Compliance: If marketed for medical use or if materials contact skin closely, biocompatibility checks may apply, though standard cosmetic use usually relies on general safety standards.
• Proposition 65: Ensure plastics and plating materials do not contain restricted chemicals above safe harbor levels.

How a project runs

1. Inquiry - Define compatible dryer models, desired swing amplitude, and aesthetic preferences.
2. Design - CAD modeling of the dual-housing system and airflow simulation to verify passive oscillation.
3. Prototype - 3D-printed housings and CNC-machined swing members for fit and function testing.
4. Pilot Run - Injection molded samples tested for swing consistency, noise, and heat resistance.
5. Production - Mass molding, assembly of swing mechanisms, quality control checks.

Quantities & timeline

Tooling for the dual-housing structure and the swing member requires precision molds to maintain tight tolerances for the rotating shaft. Airflow tuning takes time to ensure the passive mechanism triggers reliably at typical dryer speeds. Send us your target dryer compatibility list, material specs, quantity, and desired swing characteristics and we will reply with options.

Production notes

Tooling and process

Injection molding is likely used for the first and second housings to achieve the complex internal channels. The swing member may also be molded, with a separate metal or hardened plastic pin for the pivot. Electroplating could be applied for decorative finishes on the outer shell.

Cost drivers

Mold complexity for the dual-housing interlock is likely a significant factor. Material grade affects heat resistance costs. Plating thickness and seal quality around the pivot point influence cost. Packaging designed to protect the fragile swing mechanism adds cost.

Prototyping path

Start with 3D-printed housings to validate fit. Off-the-shelf bearings or bushings are typically used for initial swing tests. Water spray or airflow tests would likely follow, to check for leakage or instability. Proceed to tooling once the passive oscillation frequency is stable.

What we would change before tooling

We would likely adjust the pivot friction to prevent freezing in heat. The air inlet hole size would typically be optimized to give sufficient pressure buildup for reliable swinging. We would also verify the snap-fit strength between the two housings to withstand vibration.

Common failure points

Water ingress at seams if used in humid environments. Plating flaking due to heat cycling. Hinge fatigue if the swing arm material is too brittle. Mold/mildew in trapped water if the design doesn’t drain properly. Suction cup hardening is not applicable here, but rubber seals may degrade.

Patent drawings

Drawings reproduced from the public patent document for reference.

Frequently asked questions

Does this nozzle require batteries or a motor?

No. The patent describes a passive mechanism. The airflow from the hair dryer itself drives the swing member. The design uses air inlet holes to increase pressure and velocity, which physically pushes the rotating part back and forth.

Will it work with any hair dryer?

It depends on the attachment interface. The patent covers the nozzle structure, but compatibility with specific dryer brands (like Dyson, Shark, or generic round barrels) requires custom mounting adapters. We can design mounts for common barrel diameters.

Why are there holes on the side of the nozzle?

These are air inlet holes. They allow outside air to enter the duct and mix with the hot air from the dryer. This mixing increases the overall airflow volume and speed, providing the force needed to make the internal swing member oscillate.

Is the swinging motion adjustable?

Yes, during the design phase. The amplitude and speed of the swing can be tuned by adjusting the weight of the swing arms, the friction of the pivot, and the size of the air inlets. Set in design / confirmed on prototypes.

Can this design be made and sold in the US?

The patent was filed in China and is in force there. The public record shows no US counterpart, so this specific Chinese patent does not restrict the design in the US. However, hair dryer accessories are subject to many other patents. We recommend a freedom-to-operate check before volume production to ensure no other US patents are infringed.

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 CN220937112U in the subject.

Helpful details to include:

• Your company and channel (personal care brand, appliance maker, accessory retailer)
• Target dryer models or barrel diameter specifications
• Desired swing angle and frequency (if known)
• Material preferences (heat rating, color, finish)
• Estimated quantity and target price
• Timeline - when you would like samples and the first shipment

You can also reach us at (332) 203-9997.