The head rest pillow for chairs is the only product of its kind that is specifically developed to be added onto chairs to ensure users are able to relax, sleep, or relieve any neck tension while sitting on a chair. This unprecedented product is uniquely designed with a plush pillow and durable clamps and locking hinges to ensure long term sustainability and functionality.

The head rest pillow for chairs is the only product of its kind that is specifically developed to be added onto chairs to ensure users are able to relax, sleep, or relieve any neck tension while sitting on a chair. This unprecedented product is uniquely designed with a plush pillow and durable clamps and locking hinges to ensure long term sustainability and functionality.

The present disclosure relates to shaped body for receiving a skull on a support plane, wherein the shaped body is substantially ring-shaped, and wherein at least in one subregion, the contour of the cross section of the shaped body has a half ellipse inclined with respect to the support plane, and wherein at least in one subregion, the contour of the cross section of the shaped body is asymmetrical.

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.

An improved binaural recording system (12) comprising two hollow artificial auricles (6a, 6b) mounted on two opposite left and right sides of a dummy head (1). Two microphone capsules are mounted inside said auricles (6a, 6b) having a sound collection face (15a, 15b) facing the outside of said auricles (6a, 6b) and arranged inside a recess (17a, 17b) of the artificial auricle. This system allows, in stereo listening to faithfully perceive and discriminate the direction of origin of the sound sources that move in front of a hypothetical listener according to the same direction of movement from top to bottom, from front to back, from right to left, or vice versa, of the sound sources at the time of recording. Furthermore, further microphone capsules may be provided, mounted on said dummy head.

An improved binaural recording system (12) comprising two hollow artificial auricles (6a, 6b) mounted on two opposite left and right sides of a dummy head (1). Two microphone capsules are mounted inside said auricles (6a, 6b) having a sound collection face (15a, 15b) facing the outside of said auricles (6a, 6b) and arranged inside a recess (17a, 17b) of the artificial auricle. This system allows, in stereo listening to faithfully perceive and discriminate the direction of origin of the sound sources that move in front of a hypothetical listener according to the same direction of movement from top to bottom, from front to back, from right to left, or vice versa, of the sound sources at the time of recording. Furthermore, further microphone capsules may be provided, mounted on said dummy head.

A face cushion includes a hollow-out portion located at a central portion of the face cushion; an inflatable portion having an inner peripheral edge located adjacent to the hollow-out portion, an outer peripheral edge, and two slit edges located between the inner and the outer peripheral edge, with an area between the inner and the outer peripheral edge being divided into a first and a second air bag; a slit section formed between the two slit edges; and a plurality of inflating connections separately connected to the first and the second air bag. The first and the second air bag are inflated alternately with gas supplied from a gas supply device to the inflatable body via different pipelines at different time points to produce on the face cushion a facial configuration similar to a patient's face, allowing different parts of the patient's face to contact with the face cushion intermittently.

A pillow may include a first arm and a second arm, and a connecting portion may be connected to the first arm and the second arm. The connecting portion may be sized and configured to allow the first arm and second arm to move independently. For example, the first arm may be rotatable relative to the connecting portion by at least about 30°, at least about 45°, at least about 60°, at least about 75°, at least about 90°, or more. The second arm may be rotatable relative to the connecting portion by at least about 30°, at least about 45°, at least about 60°, at least about 75°, at least about 90°, or more.

An adjustable connection joint has a partially shaped spherical member attached to a first member to be adjusted with respect to a second member. A slidable base member slides in a bushing which is attached to the second member. A bolt extends through a washer that spreads a slotted end of the slidable base member against the bushing. Tightening the bolt pulls a locking member against an inside of the partially spherically shaped member and pulls it against a conical cavity on an end of the slidable member. Tightening the bolt concurrently locks the slidable member in the bushing and locks a position of the partially shaped cylindrical member in the conical cavity at the end of the slidable member.