A telescopic mechanism , comprising: a first component ; and a second component capable of moving relative to the first component along a longitudinal direction; wherein one of the first component and the second component is arranged with a contacting portion , and the contacting portion resiliently abuts against the other one of the first component and the second component , such that a friction resistance is provided when the second component is moved relative to the first component ; wherein the first component is arranged with a first limiting feature , the second component is arranged with a second limiting feature , and the first limiting feature and the second limiting feature are capable of abutting with each other; wherein one of the first limiting feature and the second limiting feature is a protrusion , and the other of the first limiting feature and the second limiting feature is a flexible arm ; and wherein the one of the first component and the second component arranged with the contacting portion is formed with a first hole , and the contacting portion is disposed in the first hole ; the one of the first component and the second component arranged with the flexible arm is formed with a second hole , and the flexible arm is disposed in the second hole ; and the one of the first component and the second component arranged with the flexible arm comprises a U-shaped structure (Y1), a first connecting portion (Y3) and a second connecting portion (Y4), the U-shaped structure (Y1) is disposed between the first connecting portion (Y3) and the second connecting potion (Y4), the U-shaped structure (Y1) is bent relative to the first connecting portion (Y3) and the second connecting potion (Y4) so as to form a dodging space (Y2) below the U-shaped structure (Y1), a height (h1) of the dodging space (Y2) is greater than a height (h2) of the protrusion , and the flexible arm is disposed at the U-shaped structure (Y1). a first component ; and a second component capable of moving relative to the first component along a longitudinal direction; wherein one of the first component and the second component is arranged with a contacting portion , and the contacting portion resiliently abuts against the other one of the first component and the second component , such that a friction resistance is provided when the second component is moved relative to the first component ; wherein the first component is arranged with a first limiting feature , the second component is arranged with a second limiting feature , and the first limiting feature and the second limiting feature are capable of abutting with each other; wherein one of the first limiting feature and the second limiting feature is a protrusion , and the other of the first limiting feature and the second limiting feature is a flexible arm ; and wherein the one of the first component and the second component arranged with the contacting portion is formed with a first hole , and the contacting portion is disposed in the first hole ; the one of the first component and the second component arranged with the flexible arm is formed with a second hole , and the flexible arm is disposed in the second hole ; and the one of the first component and the second component arranged with the flexible arm comprises a U-shaped structure (Y1), a first connecting portion (Y3) and a second connecting portion (Y4), the U-shaped structure (Y1) is disposed between the first connecting portion (Y3) and the second connecting potion (Y4), the U-shaped structure (Y1) is bent relative to the first connecting portion (Y3) and the second connecting potion (Y4) so as to form a dodging space (Y2) below the U-shaped structure (Y1), a height (h1) of the dodging space (Y2) is greater than a height (h2) of the protrusion , and the flexible arm is disposed at the U-shaped structure (Y1). <EOS>