Retractable built-in interdental brush

A retractable built-in interdental brush, comprising:

• a built-in interdental brush comprising a brush body tip, and a delivery device comprising a connecting portion, hollow passageway, and curved elbow outlet with an inclined end surface;
• a retractable mechanism;
• and
• a handle comprising an accommodation space;
• wherein the retractable mechanism and the built-in interdental brush are configured to retract into the accommodation space of the handle into a stowed position and the retractable mechanism and the built-in interdental brush are configured to slide out of the accommodation space to an extended operating position;
• when configured in the extended operating position, the delivery device is configured to stow the brush body tip within the hollow passageway in a retracted position and configured to deflect the brush body tip with the curved elbow outlet as the brush body tip is slid along an axial axis of the delivery device to a fully extended position wherein the brush body tip extends from the inclined end surface at an obtuse angle relative to the axial axis;
• wherein the inclined end surface is oriented at an acute angle relative to both the brush body tip in the fully extended position and the axial axis, wherein a distance between a most distal tip of the inclined end surface and the axial axis of the delivery device is larger than a distance between a most proximal point of the inclined end surface and the axial axis of the delivery device;
• wherein during use of the retractable built-in interdental brush:
• the retractable mechanism and the built-in interdental brush are slid out of the accommodation space to the extended operating position;
• the most distal tip of the inclined end surface of the curved elbow outlet is pushed against a gap between teeth of a user and the brush body tip is extended to the fully extended position and enters the gap between the teeth;
• and
• wherein after use of the retractable built-in interdental brush, the brush body tip is retracted into the delivery device into the retracted position and the retractable mechanism and the built-in interdental brush are retracted into the accommodation space of the handle.