Abstract: A pipe cutter includes two bodies connected to each other to form a first room. Each body includes a passage. One of the two bodies has a second room. A torsion spring is located in the first room and includes a mounting member and a radial opening. A blade unit includes a pin, a blade, a movable member, a spring and an action member. When activating the action member to drive the movable member to compress the spring, the third contact portion and the second engaging portion of the movable member are disengaged from the groove and the first engaging portion of the pin, and the pin is not restricted and can be removed from the passage. The blade is not restricted by the pin and replaceable.

Abstract: A pipe cutter includes two bodies connected to each other to form a first room. Each body includes a passage. One of the two bodies has a second room. A torsion spring is located in the first room and includes a mounting member and a radial opening. A blade unit includes a pin, a blade, a movable member, a spring and an action member. When activating the action member to drive the movable member to compress the spring, the third contact portion and the second engaging portion of the movable member are disengaged from the groove and the first engaging portion of the pin, and the pin is not restricted and can be removed from the passage. The blade is not restricted by the pin and replaceable.

Abstract: A pipe cutter includes a body and a cutting wheel unit. The body includes a slot, a transverse slot and a recessed area. The cutting wheel unit includes a shaft, a cutting wheel, a movable member and a resilient member. The shaft is pivotably connected to the transverse slot and includes a flange and an engaging groove. The cutting wheel is received in the slot and is pivotably connected to the shaft. The movable member is movably received in the recessed area and has an engaging portion which is engaged with the engaging groove of the shaft. The resilient member is biased between the recessed area and the movable member so that the shaft is restricted from being disengaging from the transverse slot by the movable member.

Abstract: A ratchet wrench includes a first room, a second room, an engaging portion, a third room and a first groove in the function end thereof. Multiple ratchet wheels are received in the third room and one of which is rotatably received in the first room. Each ratchet wheel includes a first pivotal portion, a second pivotal portion and a first toothed portion which is defined in a curved and concaved manner in the outer periphery of the ratchet wheel. A pawl is located in the second room and has a second toothed portion which is engaged with the first toothed portion of the ratchet wheel. The distance defined between the deepest point of the first toothed portion to the first pivotal portion or the second pivotal portion is larger than the distance that the ratchet wheel shifts relative to the pawl within the first room.

Abstract: A pipe cutter includes a body and a cutting wheel unit. The body includes a slot, a transverse slot and a recessed area. The cutting wheel unit includes a shaft, a cutting wheel, a movable member and a resilient member. The shaft is pivotably connected to the transverse slot and includes a flange and an engaging groove. The cutting wheel is received in the slot and is pivotably connected to the shaft. The movable member is movably received in the recessed area and has an engaging portion which is engaged with the engaging groove of the shaft. The resilient member is biased between the recessed area and the movable member so that the shaft is restricted from being disengaging from the transverse slot by the movable member.

Abstract: A ratchet wrench includes a first room, a second room, an engaging portion, a third room and a first groove in the function end thereof. Multiple ratchet wheels are received in the third room and one of which is rotatably received in the first room. Each ratchet wheel includes a first pivotal portion, a second pivotal portion and a first toothed portion which is defined in a curved and concaved manner in the outer periphery of the ratchet wheel. A pawl is located in the second room and has a second toothed portion which is engaged with the first toothed portion of the ratchet wheel. The distance defined between the deepest point of the first toothed portion to the first pivotal portion or the second pivotal portion is larger than the distance that the ratchet wheel shifts relative to the pawl within the first room.

Abstract: A wrench system includes an outer case and an inner case which is slidably inserted in the outer case. The outer case has a first slot defined axially therein. The first slot has a first opening and a first closed end. The inner case has a second slot defined axially therein. The second slot has a second opening and a second closed end. The inner case has multiple first holes defined through the bottom thereof and the second slot so as to receive a non-circular insertion portion of a tool. The first holes has different sizes so that the handle is cooperated with different sizes of the L-shaped wrenches.

Abstract: A wrench system includes an outer case and an inner case which is slidably inserted in the outer case. The outer case has a first slot defined axially therein. The first slot has a first opening and a first closed end. The inner case has a second slot defined axially therein. The second slot has a second opening and a second closed end. The inner case has multiple first holes defined through the bottom thereof and the second slot so as to receive a non-circular insertion portion of a tool. The first holes has different sizes so that the handle is cooperated with different sizes of the L-shaped wrenches.

Abstract: The invention is to provide a micro vibrating motor which includes a weight block having a coupling portion thereon to receive a rotary shaft disposed at an end edge of a motor, and a weld portion provided at the connecting edges of the coupling portion and the rotary shaft enabling the weight block and the rotary shaft to be coupled firmly.