Cushioning member

A cushioning member for holding a tubular part in a first contact region, a second contact region and a third contact region, the tubular part having an inner circumferential surface, the cushioning member comprising:

• a base portion;
• a first protruding portion that protrudes from the base portion, the first protruding portion having a first sidewall and a first portion protruding from the first sidewall of the first protruding portion;
• a second protruding portion that protrudes from the base portion, the second protruding portion having a second sidewall and a part protruding from the second sidewall of the second protruding portion;
• and
• a third protruding portion that protrudes from the base portion, the third protruding portion having a third sidewall, a second portion and a third portion protruding from the third sidewall of the third protruding portion,
• wherein:
• the first protruding portion is located between the second protruding portion and the third protruding portion,
• the cushioning member is configured to fit the tubular part in a first facing direction such that an inner circumferential surface of the tubular part contacts the part of the second protruding portion,
• the first portion contacts the first contact region, the second portion contacts the second contact region, and the third portion contacts the third contact region, the first contact region being located between the second contact region and the third contact region as viewed in a direction normal to the first contact region, and
• a distance between the first contact region and the second contact region is smaller than a distance between the first contact region and the third contact region, and a frictional force in the second contact region, which occurs when the tubular part is detached in a direction away from the base portion, is greater than a frictional force in the third contact region.

A cushioning member for holding a tubular part in a first contact region, a second contact region and a third contact region, the tubular part having an inner circumferential surface, the cushioning member comprising:

• a base portion;
• a first protruding portion that protrudes from the base portion, the first protruding portion having a first sidewall and a first portion that is a corner in the first sidewall of the first protruding portion;
• a second protruding portion that protrudes from the base portion, the second protruding portion having a second sidewall and a part protruding from the second sidewall of the second protruding portion;
• and
• a third protruding portion that protrudes from the base portion, the third protruding portion having a third sidewall, a second portion and a third portion protruding from the third sidewall of the third protruding portion,
• wherein:
• the first protruding portion is located between the second protruding portion and the third protruding portion,
• the cushioning member is configured to fit the tubular part in a first facing direction such that an inner circumferential surface of the tubular part contacts the part of the second protruding portion,
• the first portion contacts the first contact region, the second portion contacts the second contact region, and the third portion contacts the third contact region, and
• a distance between the first contact region and the second contact region is smaller than a distance between the first contact region and the third contact region, and a frictional force in the third contact region, which occurs when the tubular part detached in a direction away from the base portion, is greater than a frictional force in the second contact region.