Chairs and seats – Headrest – Angularly movable about horizontal axis
Patent
1998-06-25
1999-12-14
Barfield, Anthony D.
Chairs and seats
Headrest
Angularly movable about horizontal axis
297409, A47C 738, B60N 248
Patent
active
060007605
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a headrest tilting device for automobile for adjusting the tilt or the inclination of the headrest and a device for moving the headrest forward and backward utilizing the tilting device (herein after referred as headrest traversing device). The present invention provides a headrest tilting device with a simple structure that can be made with a small number of parts and manufacturing processes and a headrest traversing device which enables forward and backward movement of the headrest by simply adding a few parts to the headrest tilting device.
BACKGROUND OF THE INVENTION
The structures of the conventional headrest tilting device and headrest traversing device did not have any identical parts and components of the former were incompatible with those of the latter.
Moreover, the conventional devices were very complicated in their structures.
Consequently, the conventional headrest tilting device and headrest traversing device could not avoid complicated manufacturing processes, low productivity and high production costs.
The objective of the present invention, aimed to solve the above problems, is to provide a simple structured headrest tilting device and a headrest traversing device made by simply adding some parts to the above tilting device, thereby enhancing productivity and lowering manufacturing costs of the traversing device.
DISCLOSURE OF THE INVENTION
The present invention provides a headrest tilting device for automobile comprising: a stay made of a steel rod having a horizontal portion and a pair of parallel vertical portions extending from both ends of the horizontal portion; a ratchet member fixed to the horizontal portion of the stay, which is provided with a plurality of teeth and a jaw with a depression between them; a tilt adjusting member having a pair of parallel side panels, each of whose lower portion is provided with an engaging groove for pivotal engagement with the horizontal portion of the stay, wherein the inner surface of one side panel adjoins the outside surface of the ratchet member; a first torsion coil spring wound around the horizontal portion of the stay, interposing between the ratchet member and the other side panel of the tilt adjusting member, two ends of which are respectively hooked on the ratchet member and the other side panel of the tilt adjusting member; a check member having teeth to travel and engage with the teeth of the ratchet member and a jaw for interacting with the jaw of the ratchet member, which is pivobtably installed to the inner surface of one side panel of the tilt adjusting member so that the reverse rotation of the tilt adjusting member may be prevented; and one side panel of the tilt adjusting member, while the other end is hooked on the upper part of the check member.
The present invention further provides a headrest traversing device for automobile comprising: a stay made of a steel rod having a horizontal portion and a pair of parallel vertical portions extending from both ends of the horizontal portion; a ratchet member fixed to the horizontal portion of the stay, which is provided with a plurality of teeth and a jaw with a depression between them; a tilt adjusting member having a pair of parallel side panels, which is in pivotal engagement with the horizontal portion of the stay; a first torsion coil spring which is arranged to bias the tilt adjusting member in the opposite direction to the rotation; a check member having teeth to travel and engage with the teeth of the ratchet member and a jaw for interacting with the jaw of the ratchet member as to prevent the reverse rotation of the tilt adjusting member; a second torsion coil spring, one end of which is hung on the upper part of one side panel of the tilt adjusting member, while the other end is hooked on the upper part of the check member; and a back and forth movement device mounted on the horizontal portion of the stay, which is arranged to move a cover which accommodates the tilt adjusting member and the horizontal portion of the
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