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.

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.

A pivoting fitting is formed with first pivoting lever that is movable about an axis of rotation in relation to a second pivoting lever, and a blocking device is provided to block a rotational motion of the first pivoting lever in relation to the second pivoting lever in a first direction of rotation and to enable rotational motion in an opposite second direction of rotation in a blocking position. In addition, a switching element enables infinitely variable adjustment of the blocking position to deactivate the blocking device for an adjusting process of the first pivoting lever relative to the second pivoting lever in the first direction of rotation.

A pivoting fitting is formed with first pivoting lever that is movable about an axis of rotation in relation to a second pivoting lever, and a blocking device is provided to block a rotational motion of the first pivoting lever in relation to the second pivoting lever in a first direction of rotation and to enable rotational motion in an opposite second direction of rotation in a blocking position. In addition, a switching element enables infinitely variable adjustment of the blocking position to deactivate the blocking device for an adjusting process of the first pivoting lever relative to the second pivoting lever in the first direction of rotation.

A folding chair device of the present invention includes a seat support assembly, a backrest assembly, a leg rest assembly, a backrest driving device, a connecting rod assembly and a leg rest driving device. A bottom of the backrest assembly is pivotally connected with the seat support assembly, the backrest driving device is pivotally connected with the backrest assembly; the leg rest assembly is pivotally connected with the seat support assembly, the leg rest driving device is mounted on the seat support assembly, and the connecting rod assembly is connected with a driving end of the leg rest driving device and pivotally connected with the leg rest assembly. The inclination angle of multiple assemblies of the device can be adjusted, and the device has a simple structure and low production cost, which is suitable for popularization in industry and daily life.

The invention concerns a seat back (10) for an article of adjustable furniture comprising: a frame (12), at least one movable support section (14, 80) mounted for angular adjustment with respect to the frame; cam means (64) associated with one of the frame and the movable support section, cam follower means (58) associated with the other of the frame and the movable support section; actuator means (38) for moving said cam means or cam follower means associated with the frame with respect to the frame; whereby movement of said actuator means effects relative movement of said cam means with respect to said cam follower means and said relative movement effects angular adjustment of said support section relative to the frame to alter the seat back configuration. The present invention contemplates embodiments where the support section(s) comprise(s) an adjustable head rest (14), an adjustable lumbar support (80) or both.

The invention concerns a seat back (10) for an article of adjustable furniture comprising: a frame (12), at least one movable support section (14, 80) mounted for angular adjustment with respect to the frame; cam means (64) associated with one of the frame and the movable support section, cam follower means (58) associated with the other of the frame and the movable support section; actuator means (38) for moving said cam means or cam follower means associated with the frame with respect to the frame; whereby movement of said actuator means effects relative movement of said cam means with respect to said cam follower means and said relative movement effects angular adjustment of said support section relative to the frame to alter the seat back configuration. The present invention contemplates embodiments where the support section(s) comprise(s) an adjustable head rest (14), an adjustable lumbar support (80) or both.

Provided is a device for supporting a person's head in a horizontal position when the person is standing in an erect position, comprising: a) a support member configured to be positioned above the head and further configured to be attached to the person's body; b) a head rest attached to the support member, the head rest configured for a person to rest the person's forehead; wherein a person walks with the device attached and rests the forehead on the head rest.

A system can include a base configured to support a lower half of a human body. The system can also include a headrest elevated relative to the base, wherein the headrest is disposed adjacent to a proximal end of the base, where the headrest is configured to support a head of the human body. The system can further include a back platform having a first end and a second end, where the first end is coupled to the base, where the second end is disposed adjacent to the headrest, and where the back platform has a curvature, where the back platform is configured to support a torso of the human body. The system can also include a vibrating mechanism in communication with the back platform, where vibrations generated by the vibrating mechanism translate to the back platform.

A system can include a base configured to support a lower half of a human body. The system can also include a headrest elevated relative to the base, wherein the headrest is disposed adjacent to a proximal end of the base, where the headrest is configured to support a head of the human body. The system can further include a back platform having a first end and a second end, where the first end is coupled to the base, where the second end is disposed adjacent to the headrest, and where the back platform has a curvature, where the back platform is configured to support a torso of the human body. The system can also include a vibrating mechanism in communication with the back platform, where vibrations generated by the vibrating mechanism translate to the back platform.