Sealing of an end cap of an aerosol-generating device

An end cap for an aerosol-generating device, the end cap comprising:

• an end cap body extending along an axial direction from a base section of the end cap body to a cap section of the end cap body;
• and
• a sealing with a sealing lip portion circumferentially surrounding the base section and extending outwardly away from the base section,
• wherein a resistance of the sealing lip portion to bend into the axial direction is smaller than a resistance of the sealing lip portion to bend against the axial direction,
• wherein the sealing comprises a seating portion, wherein the sealing lip portion extends outwardly from the seating portion,
• wherein the base section comprises a circumferential groove,
• wherein the seating portion is at least partially received in the circumferential groove,
• wherein the circumferential groove comprises a first groove portion and a second groove portion downstream of the first groove portion with respect to the axial direction, and
• wherein the second groove portion extends farther radially inward than the first groove portion.

A housing sleeve for an aerosol-generating device, the housing sleeve comprising:

• a sleeve body extending from a first end of the sleeve body along an axial direction to a second end of the sleeve body,
• wherein the sleeve body comprises a sleeve wall circumferentially extending around the axial direction, thereby surrounding an inner space,
• wherein the sleeve wall defines an opening into the inner space at the second end of the sleeve body, and
• wherein the sleeve wall comprises a circumferential chamfer connecting an inner surface of the sleeve wall facing towards the inner space and an end surface of the sleeve wall facing into the axial direction.