Vehicular seat back table

• US 10,166,903 B2
• Filed: 12/18/2017
• Issued: 01/01/2019
• Est. Priority Date: 12/16/2016
• Status: Active Grant

• Current Assignee: Hyung Jong Oh
• Original Assignee: Hyung Jong Oh
• Inventors: Oh, Hyung Jong
• Primary Examiner(s): Chen, Jose V
• Application Number:
  US15/844,787
• Publication Number:
  US 20180178699A1
• Time in Patent Office: 379 Days
• Field of Search: 297146, 297154, 297150, 108 44, 108 45, 108152, 108 47, 108 42
• CPC Class Codes: B60N 2/64 Back-rests or cushions B60N2/2222 takes precedence
• CPC Class Codes: B60N 3/001 of tables or trays
• CPC Class Codes: B60N 3/004 of foldable trays mounted on the back-rest
• CPC Class Codes: B60Y 2400/405 Electric motors actuators
• CPC Class Codes: F16H 1/28 with gears having orbital motion
• CPC Class Codes: F16H 19/04 comprising a rack
• CPC Class Codes: F16H 33/02 Rotary transmissions with mechanical accumulators, e.g. weights, springs, intermittently-connected flywheels

Abstract

Disclosed herein is a vehicular seat back table apparatus including: a guide member installed at each of both sides of a table installation space of a backrest and including a rack gear portion; a driving shaft at which a pinion rotatably, which is installed at a guide frame and engaged with the rack gear portion of the guide member, is installed; a driving unit rotated by a rotation varying unit connected to the driving shaft, installed at a side surface of a table, and including a rotating hinge shaft member configured to provide a rotational force to rotate the table when the pinion is moved along the rack gear portion; and an elastic bias portion configured to support the guide frame to move upwardly along the guide member.

Claims

1. A vehicular seat back table apparatus pivotable between a stowed position in a table installation space of a backrest and a deployed position, comprising:

a guide member installed at each of both sides of the table installation space, each guide member including a rack gear portion;

a pinion gear, rotatably coupled to the rack gear portion of each guide member;

a rotation varying unit associated with and coupled to each of the pinion gears, each rotation varying unit connected by a rotatable hinge shaft to one side of a table, and coupled to an associated pinon gear through a sun gear installed at an end portion of the shaft, the sun gear being coupled to planetary gears installed on an outer circumferential surface of the sun gear and the planetary gears being coupled to a ring gear, whereby pivotal motion of the table is transmitted through the gears;

first and second springs, each spring having one end connectable to a guide member and another end connectable to the backrest for biasing each guide member toward a table-stowed position.

2. The vehicular seat back table apparatus of claim 1, further comprising a damping unit installed intermediate and rotationally coupled to each guide member and each rotation varying unit, each damping unit comprising a sub-rack gear and a sub-pinion gear and a hydraulic damper configured to provide a damping force when the table, is lifted or lowered.