A headrest at the backrest of a motor vehicle which is guided in the backrest by means of two mutually parallel support rods and is adjustable in its height; the support rods are slightly bent in the direction toward the back side of the backrest and are guided in substantially rectilinear guide members which include two guide bodies that are arranged at a distance from one another, surround the support rods and are slightly movable transversely to the longitudinal direction of the support rods.
A headrest mounting structure to be provided in seats for vehicles such as automobiles is disclosed in which two spaced stays for supporting a headrest onto a seat back are respectively inserted into two support tubes provided in the seat back and the two support tubes are respectively inserted through a pair of brackets fixed to the seat back. Each of insertion bores formed in the brackets for insertion of the support tubes and insertion bores formed in the support tubes for insertion of the stays is formed as an elongated bore having a straight portion extending transversely of the seat back. Such elongated insertion bores permit compensation of errors in the distances between the stays as well as between the support tubes.
A headrest mounted above a dental chair backrest can readily be positioned by means of a headrest bar engaging a locking device affixed to the chair backrest. The locking device comprises a pair of resilient rubber surfaces or other high friction material surfaces which grip or contact the headrest bar to positively lock the headrest in position. By merely pushing the headrest to a more vertical position, the headrest bar is caused to lose contact with the gripping surfaces. A spring-loaded block is selectively disposed through each of the high friction surfaces to urge the bar in stronger contacting relation with said high friction surfaces in any operating position of the headrest, the blocks themselves also providing low friction surfaces against which the bar may ride when the headrest is being repositioned by initially pushing it to a more vertical position.
A headrest mounted to the top of a dental chair backrest can readily be positioned by means of a headrest bar engaging a locking device affixed to the chair backrest. The locking device comprises a pair of resilient rubber surfaces which grip or contact the headrest bar to positively lock the headrest in position. By merely pushing the headrest to a more vertical position, the gripping or contacting of the rubber surfaces to the headrest bar is substantially eliminated to thus permit positioning of the headrest. Release of headrest will return it once again to a locked position.
A headrest for motor vehicle seats having support rods frictionally slidable through respective tubular guide elements which are rigidly secured to the structure of a seat backrest. The support rods are slack fitted within the tubular guide elements so as to be forwardly and rearwardly tiltable around a lower transverse axis and are kept in a substantially centered equilibrium position by resilient members provided within the tubular guide elements in front and in the back of the support rods. In case of forward or rearward tilting of the headrest, positioning notches of the support rods are engaged by respective restraining members also housed within the tubular guide elements.
A headrest for motor vehicle seats whose support rods are slidable through respective tubular guide members for height adjustment of the headrest resilient body. The support rods are forwardly and rearwardly swingable around a transverse axis placed in proximity of the lower ends of the tubular guide members between a first angular position in which respective stationary restraining engage corresponding positioning notches of the support rods so as to prevent sliding thereof, and a second angular position in which sliding is enabled. The support rods are normally maintained in the first angular position by respective annular sliders slidably mounted over the tubular guide members.
