Line trimmers and/or edgers for weed and vegetation are discussed. One example embodiment comprises: a trimmer head configured to rotate a portion of a trimmer line comprising a cutting end of the trimmer line; a trimmer motor configured to drive the rotation of the trimmer head; a continuous line feed mechanism configured to continuously feed the trimmer line into the trimmer head while the continuous line feed mechanism is active; and one or more line feed activation mechanisms configured to control an activation and a deactivation of the continuous line feed mechanism.

A subassembly for a trimmer head of a power tool, the subassembly including: a flywheel; and a cartridge including a segment of trimmer line, wherein the cartridge is removably keyed to the flywheel, wherein the subassembly is configured to be operatively coupled to a motor of the power tool, and wherein the subassembly is removably positionable in a housing of the power tool.

A grass trimming head includes a housing assembly and a spool. The housing assembly is formed with a housing cavity and an outer aperture for allowing a cutting line to be inserted from an outside of the housing assembly into the housing cavity. At least a portion of the spool is arranged inside the housing cavity, and the spool is rotatable with respect to the housing assembly about a central axis. The spool is formed with an inner aperture for allowing the cutting line to be inserted into the spool or a clamping portion configured to fix the cutting line.

A trimmer head (1) comprises a rotatable housing (12) connectable to a trimmer line spool (13) rotatably supported by said housing (12) and a locking mechanism (14) for locking the trimmer line spool (13) to the housing (12) with a locking force (F.sub.L). The locking mechanism (14) is arranged to be moved from a locked to an unlocked position when a rotation speed of the trimmer head (1) is increased above an operating speed. The increased rotation speed causes a releasing force (F.sub.R) greater than the locking force (F.sub.L). In the unlocked position, the locking mechanism (14) releases the trimmer line spool (13) from the housing (12) such that the trimmer line spool (13) is movable and a trimmer line (3) spooled around the spool (13) is released and pulled out by a centrifugal force (F.sub.c) caused by the rotation of the trimmer head (1), allowing feed of the trimmer line (3).

A hand-held cutting device (10) including an elongated member (45) graspable along a portion thereof by an operator, a trimmer head (25) disposed at one end of the elongated member, and a power unit operably coupled to the trimmer head to selectively cause rotation of the trimmer head, wherein the trimmer head comprises a line holding assembly (110) to hold and selectively release the trimmer line (70) and a housing to house the line holding assembly, wherein the line holding assembly includes a core (340) having a first portion (342) and a second portion (350), and a spool (130) configured to hold trimmer line that is operably coupled to the core, and wherein the second portion of the core is non-rotatably fixed to the first portion of the core when the trimmer head is in an at-rest state, and is rotatable with respect to the first position of the core when the trimmer head is in an in-use state and rotating.

The present invention is directed to a string trimmer line feeding mechanism having a sliding lever that locks a spool relative to the spool housing, and only feeds additional cutting line when the user actuates a button. This brakes a motor, which generates a force acting on the spool to move the lever into an unlocked position, allowing the spool to rotate relative to the spool housing and feed additional cutting line.

A grass trimming head includes a housing assembly and a spool. The housing assembly is formed with a housing cavity and an outer aperture for allowing a cutting line to be inserted from an outside of the housing assembly into the housing cavity. At least a portion of the spool is arranged inside the housing cavity, and the spool is rotatable with respect to the housing assembly about a central axis. The spool is formed with an inner aperture for allowing the cutting line to be inserted into the spool or a clamping portion configured to fix the cutting line.

A trimmer head includes a spool formed with a winding portion for winding a trimmer line and a head housing formed with an accommodating space for accommodating at least a portion of the spool. The trimmer head further includes an intermediate element for transmitting a torque between the spool and the head housing such that one of the spool and the head housing rotates with the other. The spool drives the intermediate element to rotate and the intermediate element is slidably connected to the spool in a direction along a rotation axis or parallel to the rotation axis. The spool does not move in the axial direction when the trimmer head of the grass trimmer is unwinding the trimmer line, thereby effectively avoiding the problem of the trimmer line jamming.

A trimmer mower rotor (100), formed by a receptacle (105) on which at least one plastic thread (103) is wound, wherein the receptacle is rotatably accommodated in a housing (101) and the receptacle (105) and the housing are rotatable about a single axis, wherein the housing (101) has at least one opening through which the at least one plastic thread (103) is passed to the outside. The receptacle (105) and the housing having the at least one opening rotate at different speeds.

A grass trimmer includes a trimming head, a driving device for driving the trimming head to rotate so as to cut vegetation and an operating device for a user to operate so as to control the driving device. The trimming head includes a spool and a line holding member, the spool is used to wind a cutting line, and the line holding member is formed with a line holding structure. The driving device includes a motor. The grass trimmer has an auto-winding mode. In the auto-winding mode, the motor drives at least one of the spool and the line holding member to make the spool and the line holding member rotate relatively so that the cutting line is wound on the spool automatically.