Source: http://www.google.com/patents/US6568753?dq=5,815,488
Timestamp: 2014-07-10 20:24:42
Document Index: 20697118

Matched Legal Cases: ['art 41', 'art 39', 'arts 39', 'art 41', 'art 41', 'arts 41', 'art 41', 'art 41', 'art 41', 'art 41']

Patent US6568753 - Vehicular seat - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA headrest (7) is mounted to a seat back (3) and movable forward from a set position, a linking mechanism (19) is provided on the seat back (3) for transmitting an inertial force due to the load by a passenger's body acting on the seat back (3), causing the headrest (7) to move forward, a detector (21)...http://www.google.com/patents/US6568753?utm_source=gb-gplus-sharePatent US6568753 - Vehicular seatAdvanced Patent SearchPublication numberUS6568753 B1Publication typeGrantApplication numberUS 09/594,722Publication dateMay 27, 2003Filing dateJun 16, 2000Priority dateJun 18, 1999Fee statusLapsedPublication number09594722, 594722, US 6568753 B1, US 6568753B1, US-B1-6568753, US6568753 B1, US6568753B1InventorsYoichi WatanabeOriginal AssigneeNissan Motor Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (5), Referenced by (43), Classifications (22), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetVehicular seatUS 6568753 B1Abstract A headrest (7) is mounted to a seat back (3) and movable forward from a set position, a linking mechanism (19) is provided on the seat back (3) for transmitting an inertial force due to the load by a passenger's body acting on the seat back (3), causing the headrest (7) to move forward, a detector (21) performs a detection of contact of the passenger'body with the headrest (7), and a canceler (23) cancels transmission of the inertial force by the linking mechanism (19) when contact of the passenger's body with the headrest (7) is detected by the detector (21).
What is claimed is: 1. A vehicular seat comprising:
a seat back; a headrest mounted on the seat back and movable at least forward from a set position; a linking mechanism linking the seat back to the headrest, the linking mechanism being comprised of an inertial force receiver movably supported on the seat back; and a driver joined relative to the headrest and configured to be interlocked with the inertial force receiver to move the headrest forward; a detector coupled to at least one of the seat back and the headrest so as to detect contact of the passenger's body with the headrest, the detector being comprised of at least one stay coupled to the driver; and at least one support coupling the seat back with the headrest, wherein when the headrest is at the set position, the at least one stay contacts the at least one support; and an engagement and disengagement effecter coupled to the linking mechanism to cancel movement of the linking mechanism when contact of the passenger's body with the headrest is detected by the detector, the engagement and disengagement effecter being mechanically interlockable with rearward movement of the headrest, wherein the engagement and disengagement effecter is configured to effect an engagement between the inertial force receiver and the driver to achieve an inertial force transmittable state when the headrest is in the set position, and to be interlocked with the driver for disengagement from the engagement to achieve an inertial force non-transmittable state. 2. A vehicular seat according to claim 1, wherein the engagement and disengagement effecter comprises an interlocking pin provided on one of the inertial force receiver and the driver, and a cutout provided on the other of the inertial force receiver and the driver.
a seat back; a headrest mounted to the seat back and movable at least forward from a set position; linking means linking the seat back to the headrest for transmitting an inertial force due to a load by a passenger's body acting on the seat back from the seat back to the headrest; detecting means coupled to at least one of the seat back and the headrest for detecting contact of the passenger's body with the headrest; and cancelling means coupled to the linking means for cancelling movement of the linking means when contact of the passenger's body with the headrest is detected by the detecting means. 8. A vehicular seat according to claim 7,
wherein the detecting means detects rearward movement of the headrest, and wherein the canceling means comprises engaging and a disengaging means for mechanically interlocking the cancelling means to the linking means and being releasable therefrom. 9. A vehicular seat according to claim 8, wherein the linking means comprises inertial force receiving means movably supported on the seat back, and driving means joined relative to the headrest and interlockable with the inertial force receiving means to move the headrest forward, and wherein the engaging and disengaging means effects an engagement between the inertial force receiving means and the driving means to achieve an inertial force transmittable state when the headrest is in the set position, and is interlocked with the driving means for disengagement from the engagement to achieve an inertial force non-transmittable state.
BACKGROUND OF THE INVENTION The present invention relates to a vehicular seat having an improved headrest mounting structure.
SUMMARY OF THE INVENTION In this vehicular seat, however, the configuration is such that, when the upper body of the passenger presses the pressure-receiving member of the seat back in more than a certain amount, the headrest always moves forwardly upward, providing restraint even when the restraint by the headrest is not needed.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS There will be detailed below the preferred embodiments of the present invention, with reference to relevant accompanying drawings. Like elements are designated by like reference characters.
Positioning when the swing link 29 is urged in the forward direction by the coil spring 35 is done, for example, by the interlocking pin 37 coming into contact with an engaging part 41 a. The driver 27 has a joining link 39 mounted to the first stay 13 as the headrest stay. The joining link is formed by engaging links 39 a on both left and right sides, and a stay joining part 39 b that extends from the left to the right between the upper ends of the engaging links 39 a, the stay joining parts 39 b being fixed at the lower end of the first stay 13, and cutouts 41 being provided at the lower ends of the engaging links 39 a. The cutout 41 has a positioning engaging part 41 a, a drive engaging part 41 b, and an opening 41 c between the engaging parts 41 a and 41 b. The position engaging part 41 a of the cutout 41 engages with the interlocking pin 37. The interlocking pin 37 and cutout 41 serve as engagers/disengagers (37 and 41) that form the engagement and disengagement effecter 23, providing mechanically linked disengagement by rearward movement of the headrest 7.
Given the above, as shown in FIG. 4 when the swing link 29 undulates rearwards about the undulating pin 33 as the center at the set position of the joining link 39, the drive engaging part 41 b of the cutout 41 is positioned above the path of movement X of the interlocking pin 37, thereby causing mutual engagement between the cutout 41 and interlocking pin 37 which form the engagement and disengagement effecter, and enabling transmission of inertial force. With the interlocking pin 37 at the set position, when the bottom of the first stay 13 of the headrest 7 undulates forward about the support 17 as a center, in response to which the joining link 39 undulates to forward, the interlocking pin 37 is positioned inside the center path Y of the opening 41 c. The detector 21 is formed by the joining link 39, the first and second stays 13 and 15, and the support 17, and when the headrest moves rearward, detects that the body of a passenger has come into contact with the headrest 7.
In this condition, if inertial force acts on the seat back 3 because of the body weight load of a passenger when a rear-end collision occurs, the pressure receiver 31 is pushed in rearwardly. When this occurs, the guide pin 45 moves along the elongated hole 43, and the guide pin 45 moves from the condition A, in which it is engaged with the positioning engaging part 41 a of the cutout 41 to the condition B, in which it is engaged with the drive engaging part 41 b. If the pressure receiver 31 is pushed in further, the guide pin 45 moves further upward in the elongated hole 43, so that the lower side of the engaging link 39 a moves to the rear and downward. Thus, it is possible for the headrest 7, in the same manner as in the first embodiment, to move forwardly upward, so as to quickly restrain the head of the passenger.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5378043Jun 1, 1993Jan 3, 1995General Motors CorporationVehicle pivotal headrestUS5938279 *May 1, 1998Aug 17, 1999Lear CorporationDynamic vehicle head restraint assemblyUS6019424 *Dec 1, 1998Feb 1, 2000Ewald Witte Gmbh & Co. KgHeadrest, in particular in motor vehiclesUS6199947 *Apr 28, 2000Mar 13, 2001Saab Automobile AbVehicle seat provided with a headrestUS6250714 *Aug 27, 1999Jun 26, 2001Ikeda Bussan Co., Ltd.Seatback for automobile* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6779840 *Aug 27, 2003Aug 24, 2004Lear CorporationLocking and unlocking mechanism for an active headrest for a vehicle seatUS6983989 *Sep 24, 2004Jan 10, 2006Lear CorporationLinear adjustable active head restraintUS6983996 *Mar 11, 2002Jan 10, 2006Autoliv Development AbSafety headrest for a motor vehicleUS7185950Dec 22, 2005Mar 6, 2007Fisher Dynamics CorporationHead restraint systemUS7374239Jan 16, 2007May 20, 2008Ford Global Technologies, Inc.Active head restraint with self resetting mechanismUS7404606 *Feb 12, 2007Jul 29, 2008Hyundai Motor CompanyDevice maintaining height of an active headrestUS7588289Mar 10, 2006Sep 15, 2009Autoliv Development AbVehicle seatUS7597391Apr 18, 2008Oct 6, 2009Ford Global Technologies, LlcActive head restraint with self resetting mechanismUS7618091Jan 28, 2005Nov 17, 2009Toyota Boshoku Kabushiki KaishaHead rest control device and active head restUS7677659Feb 6, 2007Mar 16, 2010Lear CorporationActive head restraint systems for vehicle seatsUS7731280 *Dec 21, 2005Jun 8, 2010Ts Tech Co., Ltd.Active headrest mechanism for vehicle seatUS7758114 *Jul 15, 2008Jul 20, 2010Tachi-S Co. Ltd.Seat back structure of vehicle seatUS7823971Mar 27, 2009Nov 2, 2010Lear CorporationActive head restraint systems for vehicle seatsUS7850235Oct 17, 2007Dec 14, 2010Lear CorporationActive head restraint system with actuating system for a vehicle seatUS7959224Mar 17, 2009Jun 14, 2011Ford Global Technologies, LlcActive head restraint having multiple horizontal pivot pointsUS7963599 *Feb 17, 2010Jun 21, 2011Ts Tech Co., Ltd.Vehicle seat with cushion plateUS7963601 *Aug 31, 2010Jun 21, 2011Lear CorporationActive head restraint systems for vehicle seatsUS7967380Oct 28, 2005Jun 28, 2011Ts Tech Co., Ltd.Vehicle seat with cushion plate and pressure adjusting mechanismUS8011726Sep 28, 2010Sep 6, 2011Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8047606 *Mar 31, 2009Nov 1, 2011Toyota Boshoku Kabushiki KaishaHeadrest operating devicesUS8056973Mar 31, 2011Nov 15, 2011Ts Tech Co., Ltd.Coupling mechanism for headrest of vehicle seatUS8061774Sep 30, 2010Nov 22, 2011Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8070223Dec 8, 2010Dec 6, 2011Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8075052Feb 8, 2011Dec 13, 2011Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8104830Mar 31, 2011Jan 31, 2012Ts Tech Co., Ltd.Coupling mechanism for headrest of vehicle seatUS8104831Mar 31, 2011Jan 31, 2012Ts Tech. Co., Ltd.Coupling mechanism for headrest of vehicle seatUS8132857May 12, 2011Mar 13, 2012Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8132858May 12, 2011Mar 13, 2012Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8205941Jul 28, 2009Jun 26, 2012Trw Vehicle Safety Systems Inc.Active head restraint for a vehicle seatUS8210607 *Dec 20, 2006Jul 3, 2012Ts Tech Co., LtdVehicle seatUS8240757Jan 30, 2012Aug 14, 2012Ts Tech Co., Ltd.Coupling mechanism for headrest of vehicle seatUS8313140Aug 30, 2006Nov 20, 2012Ts Tech Co., Ltd.Vehicle seat and method of assembling vehicle seatUS8322786Jan 30, 2012Dec 4, 2012Ts Tech Co., Ltd.Coupling mechanism for headrest of vehicle seatUS8444219Feb 2, 2012May 21, 2013Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8562073 *Nov 19, 2012Oct 22, 2013Ts Tech Co., Ltd.Vehicle seatUS8562074 *Nov 20, 2012Oct 22, 2013Ts Tech Co., Ltd.Vehicle seatUS8678495Mar 27, 2013Mar 25, 2014Ts Tech Co., Ltd.Vehicle seat with cushion plateUS8690238Jan 14, 2008Apr 8, 2014Ford Global Technologies, LlcActive head restraint system for an automotive vehicle seatCN101195356BJan 24, 2007Jul 27, 2011现代自动车株式会社Device maintaining height of an active headrestCN101549661BApr 2, 2009Sep 19, 2012丰田纺织株式会社Headrest operating devicesEP2075154A1 *Dec 17, 2008Jul 1, 2009Aisin Seiki Kabushiki KaishaSeat for vehicleEP2075155A1 *Dec 17, 2008Jul 1, 2009Aisin Seiki Kabushiki KaishaSeat apparatus for vehicleWO2006101431A1 *Mar 10, 2006Sep 28, 2006Autoliv DevA vehicle seat* Cited by examinerClassifications U.S. Classification297/216.12International ClassificationA47C7/38, B60N2/427, B60N2/42, B60R21/055, B60R21/01, A47C7/40, B60R21/015, B60N2/48Cooperative ClassificationB60N2/4279, B60N2/4808, B60N2/4885, B60N2/4838, B60R21/015, B60R2021/01529, B60N2/42781European ClassificationB60N2/48C2, B60N2/48C3, B60N2/427T4, B60R21/015, B60N2/48W, B60N2/427T2Legal EventsDateCodeEventDescriptionJul 19, 2011FPExpired due to failure to pay maintenance feeEffective date: 20110527May 27, 2011LAPSLapse for failure to pay maintenance feesJan 3, 2011REMIMaintenance fee reminder mailedNov 3, 2006FPAYFee paymentYear of fee payment: 4Sep 6, 2000ASAssignmentOwner name: NISSAN MOTOR CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WATANABE, YOICHI;REEL/FRAME:011078/0829Effective date: 20000723Owner name: NISSAN MOTOR CO., LTD. 2 TAKARA-CHO, KANAGAWA-KU YRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google