A soldering assembly (100, 200, 300) comprising: a heater (104, 204, 304) integrally including a cover (140, 240, 340); a tip (102, 202, 302) including a flange and removably secured to a distal segment (104d, 204d, 304d) of the heater (104, 204, 304); characterised by lock means (120, 220, 320) for securing the tip (102, 202, 302) to the heater (104, 204, 304), the lock means (120, 220, 320) being adapted to move relatively with respect to the heater (104, 204, 304) along a central axis (104a, 204a, 304a) of the heater (104, 204, 304) between a tip securing position where the tip (102, 202, 302) is secured to the distal segment (104d, 204d, 304d) of the heater (104, 204, 304) and a tip releasing position where the tip (102, 202, 302) is released from the heater (104, 204, 304); a tip holder for holding the tip (102, 202, 302), an inner flange of the tip holder being configured to engage the flange, a linkage including a first cam element (148, 248, 348, 116R) disposed on the lock means (120, 220, 320)and a second cam element (116, 218, 372, 148R) being a part of the tip holder and being connected with the first cam element (148, 248, 348, 116R) so that the second cam element (116, 218, 372, 148R) is movable relative to the first cam element (148, 248, 348, 116R), the linkage transforming a rotational force of the first and second cam elements (148,248,348,116R,116,218,372,148R) relatively rotated with respect to the central axis (104a, 204a, 304a) of the heater (104, 204, 304), into a moving force to relatively move the lock means (120, 220, 320) and the heater (104, 204, 304) along the central axis (104a,204a, 304a) of the heater (104, 204, 304), and transmitting the force between the lock means (120,220,320) and the heater (104,204,304); and bias means (142, 242, 342) in the cover (140, 240, 340) being compressible for urging the linkage in a direction where the first and second cam elements (148, 248, 348, 116R, 116, 218, 372, 148R) are connected along the central axis (104a, 204a, 304a), wherein the bias means (142, 242, 342) is disposed between the cover (140, 240, 340) and the lock means (120, 220, 320), the tip holder is configured to pull the tip (102, 202, 302) against the distal segment (104d, 204d, 304d) of the heater (104, 204, 304) due to an expansion forces exerted by the bias means (142, 242, 342) on the lock means (120, 220, 320). a heater (104, 204, 304) integrally including a cover (140, 240, 340); a tip (102, 202, 302) including a flange and removably secured to a distal segment (104d, 204d, 304d) of the heater (104, 204, 304); characterised by lock means (120, 220, 320) for securing the tip (102, 202, 302) to the heater (104, 204, 304), the lock means (120, 220, 320) being adapted to move relatively with respect to the heater (104, 204, 304) along a central axis (104a, 204a, 304a) of the heater (104, 204, 304) between a tip securing position where the tip (102, 202, 302) is secured to the distal segment (104d, 204d, 304d) of the heater (104, 204, 304) and a tip releasing position where the tip (102, 202, 302) is released from the heater (104, 204, 304); a tip holder for holding the tip (102, 202, 302), an inner flange of the tip holder being configured to engage the flange, a linkage including a first cam element (148, 248, 348, 116R) disposed on the lock means (120, 220, 320)and a second cam element (116, 218, 372, 148R) being a part of the tip holder and being connected with the first cam element (148, 248, 348, 116R) so that the second cam element (116, 218, 372, 148R) is movable relative to the first cam element (148, 248, 348, 116R), the linkage transforming a rotational force of the first and second cam elements (148,248,348,116R,116,218,372,148R) relatively rotated with respect to the central axis (104a, 204a, 304a) of the heater (104, 204, 304), into a moving force to relatively move the lock means (120, 220, 320) and the heater (104, 204, 304) along the central axis (104a,204a, 304a) of the heater (104, 204, 304), and transmitting the force between the lock means (120,220,320) and the heater (104,204,304); and bias means (142, 242, 342) in the cover (140, 240, 340) being compressible for urging the linkage in a direction where the first and second cam elements (148, 248, 348, 116R, 116, 218, 372, 148R) are connected along the central axis (104a, 204a, 304a), wherein the bias means (142, 242, 342) is disposed between the cover (140, 240, 340) and the lock means (120, 220, 320), the tip holder is configured to pull the tip (102, 202, 302) against the distal segment (104d, 204d, 304d) of the heater (104, 204, 304) due to an expansion forces exerted by the bias means (142, 242, 342) on the lock means (120, 220, 320).