A connector arrangement joining a respiratory mask and headgear is adapted for single-handed disengagement by the patient. A first, rigid connector part is formed into the rigid mask frame, with a mating second connector attached to a strap of the headgear. The connectors are held away from the patient's face by the connection to the mask frame.

A retainer apparatus including a first retainer portion, a second retainer portion, a transceiver, and a sensor comprising a motion detector. The retainer apparatus includes the first retainer portion configured to be slidably attached to a first harness strap and a second retainer portion configured to be slidably attached to a second harness strap. The first retainer portion is removably attached to the second retainer portion. The motion detector is configured to detect movement of the retainer apparatus and transmit a warning signal, via the transceiver, to a controller within a vehicle comprising the retainer apparatus to alert a user in the vehicle if the movement is detected.

A safety buckle device includes a first buckle part having a partially closed space with an opening, and a second buckle part having a body, a guiding tongue, and a control key. When locking the safety buckle device, a springing detent is adapted to lock against a locking element. The control key has two recesses having different depths and arranged adjacent each other in the longitudinal direction of the control key. The detent achieves a first locking when the control key is actuated, and the detent achieves a second locking when the control key no longer is actuated, or the detent achieves a locking when the control key is not actuated. The detent is adapted to be released when the control key is actuated again, or when the control key is actuated.

A retainer apparatus including a first retainer portion, a second retainer portion, a transceiver, and a sensor comprising a motion detector. The retainer apparatus includes the first retainer portion configured to be slidably attached to a first harness strap and a second retainer portion configured to be slidably attached to a second harness strap. The first retainer portion is removably attached to the second retainer portion. The motion detector is configured to detect movement of the retainer apparatus and transmit a warning signal, via the transceiver, to a controller within a vehicle comprising the retainer apparatus to alert a user in the vehicle if the movement is detected.

A side release buckle includes: a plug; and a socket, the plug including: a base; a pair of legs; and engaging portions, the socket including: a body; an insertion opening; a housing space; engaged portions; and a pair of guide surfaces. The guide surfaces, which are formed on an inner surface of the housing space and extend in an insertion direction of the legs while being opposed to each other, each include: a squeezing portion formed continuously with corresponding one of the engaged portions; and a guiding portion formed between the squeezing portion and the insertion opening. An interval between the guiding portions-near the engaged portions is wider than an interval between the squeezing portions near the engaged portions. An inclination angle of each guiding portion to an insertion direction of the plug is smaller than an inclination angle of each of the squeezing portion to the insertion direction.

A buckle which includes a socket and a plug. The socket includes: a cylindrical main body; a hollow part formed within the main body; a pair of left and right openings continuous to the hollow part and penetrating through wall parts of the main body; and a pair of left and right first latch surfaces defined on opening-side wall surfaces of the wall parts of the main body and inclined in a direction intersecting with an insertion direction of the plug. The plug includes: a base; arms; and a pair of left and right second latch surfaces protruding outward from outer sides of the arms and inclined in the direction intersecting with the insertion direction of the plug.

A respiratory mask assembly includes a respiratory mask including a mask shell and a mask cushion, a forehead support adjustably coupled to the mask, and an angular adjustment member. The forehead support includes a joining member provided to the mask shell and a cushion frame pivotally mounted to the joining member. The cushion frame is adapted to be selectively locked against pivotal movement in at least three predetermined angular positions relative to the joining member by a tongue and slot arrangement. The angular adjustment member allows relative angular adjustment between the cushion frame and the joining member. The angular adjustment member includes a pair of flexible arms that are adapted to be flexed towards one another to disengage the tongue from a respective one of the slots, and releasing the flexible arms allows the flexible arms to resiliently flex away from one another to engage the tongue and the respective slot.

A harness apparatus including a first adjustable harness strap, a second adjustable harness strap, and a retainer apparatus. The retainer apparatus includes a first retainer portion slidably attached to the first harness strap, a second retainer portion slidably attached to the second harness strap, and a braking mechanism configured to prevent the first retainer portion and the second retainer portion from moving along the first harness strap and the second harness strap. The first retainer portion is removably attached to the second retainer portion. The braking mechanism includes a braking device configured to apply resistance to the first harness strap and/or the second harness strap and to hold the retainer apparatus in a stationary position along the first harness strap and the second harness strap.

A plug and a socket constitute a buckle. The plug includes a plug base and a pair of legs. At least one of the pair of legs includes a first extension extending from the plug base in an insertion direction of the plug, a second extension extending from the first extension in an inward width direction of the plug, an engagement portion provided on the first extension or the second extension to be engageable with a to-be-engaged portion of the socket in a detachment direction of the plug, and an operation portion provided on the second extension. When a force in the detachment direction is applied on the operation portion, the first extension is elastically deformed in the width direction of the plug in such a manner that a position of the engagement portion shifts from an engagement position to a disengagement position with respect to the to-be-engaged portion.