A grass cutting head includes a spool for winding a grass cutting line, a head housing for accommodating the spool, a first guiding structure formed on the head housing, and a second guiding structure formed on the spool. The first guiding structure guides the grass cutting line through the head housing when threading the grass cutting line. The second guiding structure guides the grass cutting line to move and be wound around the spool by relative motion created between the spool and the head housing. The head housing includes a first housing and a second housing. The first guiding structure is formed on the second housing. The spool is disposed between the first housing and the second housing. The first housing or the second housing is provided with an outer threading hole for allowing the grass cutting line to pass in or out.

A working machine may include an operation rod; a tool disposed on a front portion of the operation rod; a prime mover configured to drive the tool; a first harness connector disposed frontward of a center of gravity of the working machine and configured to be connected to a first end of the harness; and a second harness connector disposed rearward of the center of gravity of the working machine and configured to be connected to a second end of the harness opposite to the first end. In a side view of the working machine, the center of gravity of the working machine may be positioned on a first harness connector side with respect to a plane that passes through a midpoint of a line connecting the first harness connector with the second harness connector and is perpendicular to the line.

A garden tool includes a power assembly comprising an internal combustion engine having a starter motor; a battery pack for supplying power to the starter motor; a connecting rod assembly having two ends; a working head assembly, the working head assembly and the power assembly being respectively arranged at the two ends of the connecting rod assembly; and a handle assembly including two handles. One of the handles is on a left side of the connecting rod assembly, and another of the handles is on a right side of the connecting rod assembly. The battery pack is detachably assembled on at least one of the handles.

A working machine support belt includes: a back plate portion; a left shoulder belt and a right shoulder belt; a waist belt; a left suspender band that connects the left shoulder belt and the waist belt; a right suspender band that connects the right shoulder belt and the waist belt; a left side belt that extends left-downward from the back plate portion, turns forward, and is connected to a left end portion of the waist belt; a right side belt that extends right-downward from the upper portion of the back plate portion, turns forward, and is connected to a right end portion of the waist belt; a locking member that locks the left end portion and the right end portion of the waist belt; and a pad member supported via a rear support band and a front support band, and provided with a hook that supports a working machine.

A working machine support belt includes: a back plate portion; a left shoulder belt and a right shoulder belt; a waist belt; a left suspender band that connects the left shoulder belt and the waist belt; a right suspender band that connects the right shoulder belt and the waist belt; a left side belt that extends left-downward from the back plate portion, turns forward, and is connected to a left end portion of the waist belt; a right side belt that extends right-downward from the upper portion of the back plate portion, turns forward, and is connected to a right end portion of the waist belt; a locking member that locks the left end portion and the right end portion of the waist belt; and a pad member supported via a rear support band and a front support band, and provided with a hook that supports a working machine.

A twist grip throttle assembly and weed trimmer utilizing the same are described herein. The weed trimmer has a power head on an upper end of a drive shaft assembly. The power head has a power provider, such as a gas powered motor. A base assembly with a cutter head for receiving wrapped cord is on a lower end of the drive shaft assembly. A throttle activator includes a tubular member rotationally mounted on the drive shaft assembly. The tubular member defines a gripping area. Twisting rotation of the throttle activator adjusts an amount of power produced by said power provider.

A grass trimmer with an anti-sticking mechanism may include a first handle, a mounting rod, and a second handle. The first handle is arranged on top of the mounting rod. The second handle is arranged on the mounting rod close to the first handle. A battery pack is arranged at a bottom end of the first handle. A machine head housing is arranged at a bottom end of the mounting rod. A first motor is arranged inside the machine head housing. A mounting shaft is on an output shaft of the first motor via a coupling. A cutting wheel is arranged at a bottom of the mounting shaft. In the present invention, outer ends of blades cut off grass wound on the mounting shaft during up-down movement of the blades, so that the mounting shaft is prevented from being stuck by the grass to improve mowing efficiency

A grass trimmer with an anti-sticking mechanism may include a first handle, a mounting rod, and a second handle. The first handle is arranged on top of the mounting rod. The second handle is arranged on the mounting rod close to the first handle. A battery pack is arranged at a bottom end of the first handle. A machine head housing is arranged at a bottom end of the mounting rod. A first motor is arranged inside the machine head housing. A mounting shaft is on an output shaft of the first motor via a coupling. A cutting wheel is arranged at a bottom of the mounting shaft. In the present invention, outer ends of blades cut off grass wound on the mounting shaft during up-down movement of the blades, so that the mounting shaft is prevented from being stuck by the grass to improve mowing efficiency

A lawn trimmer including a cutting disc, a drive shaft; and a flexible drive shaft. The drive shaft is within a straight shaft, connected to the motor and extending to the flexible drive shaft, translating the rotation of the motor to the flexible drive shaft. The flexible drive shaft is within a curved shaft, parallel but not-colinear with the straight shaft, extends to a rotor head connected to the curved shaft, translating drive shaft rotation to a cutting disc comprising a plurality of cutting blades on a cutting plane; an intersection between the cutting plane and the curved shaft axis defines a predetermined oblique angle.

A lawn mower includes a housing with a baffle that defines an air path to produce a cross-flow. The baffle includes a vent to manipulate air pressures within the housing and facilitate movement of plant clippings. A hand-held device for trimming with a rotary blade assembly may also include a housing that defines an air path to produce a cross-flow. The hand-held trimming device may also a baffle with a vent to facilitate movement of plant clippings.