Abstract: A seat armrest is provided. The seat armrest includes a support unit, having a fixed seat and a support rod extending upward from the fixed seat; wherein the support rod has an accommodation space, and the support pole is provided with a positioning slot section composed of a vertical displacement slot and a plurality of horizontal displacement slots communicated with each other; a casing unit, sleeved around the support rod and having an installation groove communicated with the accommodation space; and an adjusting rod, having a positioning protrusion and being pivot disposed on the installation groove of the casing unit.

Abstract: A quickly installed headrest adjustment device includes a mount case connected to the chair back and includes a recessed area, an engaging hole, a latch and a first contact face on the rear side of the chair back. The engaging hole is located between the two side slots and defined through the inner bottom of the recessed area. The latch is connected to the inner top side of the engaging hole and includes a bottom face which protrudes beyond the engaging hole and faces the inner side of the recessed area. An adjustment device is mounted to the rail and includes a second contact face facing the first contact face, two ridges, and a block. The block is located between the two ridges. The users can connect the adjustment device to the mount case of the chair back to quickly install the headrest unit to the chair back.

Abstract: A quickly installed headrest adjustment device includes a mount case connected to the chair back and includes a recessed area, an engaging hole, a latch and a first contact face on the rear side of the chair back. The engaging hole is located between the two side slots and defined through the inner bottom of the recessed area. The latch is connected to the inner top side of the engaging hole and includes a bottom face which protrudes beyond the engaging hole and faces the inner side of the recessed area. An adjustment device is mounted to the rail and includes a second contact face facing the first contact face, two ridges, and a block. The block is located between the two ridges. The users can connect the adjustment device to the mount case of the chair back to quickly install the headrest unit to the chair back.

Abstract: A multi-directional adjustable armrest pad and a chair armrest device with an armrest pad are disclosed and three embodiments are provided. In an embodiment, the pad body can be adjusted to move in a longitudinal direction and a lateral direction, and rotate relative to the chair armrest, and the pad body can be lifted by controlling a regulating assembly, and the regulating assembly is also rotatable and pivotally swingable, so as to make the armrest pad suit placement of a user's hand when the user sits on the chair.

Abstract: An armrest structure includes a main base tube, an outer base tube, a control member, and a spring, and the control member includes a pivot part, a press control part, a fastening part, and a restraining part, when the press control part of the control member is pressed, the spring is pushed to store elastic energy, and the fastening part of the control member can be released from being engaged with the main base tube, and the outer base tube can be adjusted to longitudinally lift; in the other hand, when the force applied on the press control part of the control member to press and buckle is removed, the fastening pan can be engaged with the main base tube, so that the outer base tube is unable to lift and move relative to the main base tube.

Abstract: An armrest structure includes a main base tube, an outer base tube, a control member, and a spring, and the control member includes a pivot part, a press control pan. a fastening part, and a restraining part, when the press control part of the control member is pressed, the spring is pushed to store elastic energy, and the fastening part of the control member can be released from being engaged with the main base tube, and the outer base tube can be adjusted to longitudinally lift; in the other hand, when the force applied on the press control part of the control member to press and buckle is removed, the fastening pan can be engaged with the main base tube, so that the outer base tube is unable to lift and move relative to the main base tube.

Abstract: A multi-directional adjustable armrest pad and a chair armrest device with an armrest pad are disclosed and three embodiments are provided. In an embodiment, the pad body can be adjusted to move in a longitudinal direction and a lateral direction, and rotate relative to the chair armrest, and the pad body can be lifted by controlling a regulating assembly, and the regulating assembly is also rotatable and pivotally swingable, so as to make the armrest pad suit placement of a user's hand when the user sits on the chair.