US 12,220,048 B2Granted

Retractable interdental brush

OwnerXing Zhouinventor

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Abstract

A retractable interdental brush includes an interdental brush, a retractable mechanism, and a handle. The retractable mechanism is configured to drive the interdental brush to extend from the handle to clean a gap between teeth. After use, the interdental brush is retracted into an accommodation space of the handle through the retractable mechanism. The interdental brush may be a built-in interdental brush. When the built-in interdental brush is used for cleaning, a brush body may be first retracted into an elbow at a front end of a delivery device, an outlet of the elbow is pressed against the gap between teeth to push the brush body, and a working portion of the brush body and enters into the gap between teeth to clean the gap between teeth, thereby resolving a problem with existing interdental brush that easily stabs gingival tissue due to a difficulty of alignment with the gap between teeth.

Claims10

Dependent claims

A retractable interdental brush, comprising:

an interdental brush unit having (i) a brush body with a working portion and (ii) a delivery device with an open end, wherein the working portion of the brush body is configured to extend from or retract into the open end of the delivery device;
a retractable mechanism;
and
a handle, wherein:
the handle includes an accommodation space for stowing the interdental brush unit having the brush body and the delivery device in the accommodation space, and the interdental brush unit having the brush body and the delivery device are capable of extending from or retracting into the accommodation space of the handle via the retractable mechanism, wherein:
during use, the interdental brush unit having the brush body and the delivery device are adapted to extend from the accommodation space of the handle via the retractable mechanism;
and
after use, the interdental brush unit having the brush body and the delivery device are adapted to retract into the accommodation space of the handle via the retractable mechanism.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/341,215Filed 7 Jun 2021 · continuation
Priority: CN 201811648006.429 Dec 2018
Published: US 2021/0289931 A123 Sep 2021
Granted: 11 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A46B 7/023
In an expanding or articulating manner: where the bristle carrier retracts or collapses, i.e. for storage
A46B 5/0033
Having articulations, joints or flexible portions: bending or stretching or collapsing
A46B 5/0037
Bending or stretching or collapsing: flexible resilience by plastic deformation of the material
A46B 9/026
Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups: where the surface of the brush…