WO2009025541A1 - Dispositif de verrouillage pour appui-tête réglable - Google Patents

Dispositif de verrouillage pour appui-tête réglable Download PDF

Info

Publication number
WO2009025541A1
WO2009025541A1 PCT/MY2007/000059 MY2007000059W WO2009025541A1 WO 2009025541 A1 WO2009025541 A1 WO 2009025541A1 MY 2007000059 W MY2007000059 W MY 2007000059W WO 2009025541 A1 WO2009025541 A1 WO 2009025541A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking device
headrest
anchor rods
latch
compression spring
Prior art date
Application number
PCT/MY2007/000059
Other languages
English (en)
Inventor
Joon Sen Ban
Original Assignee
Automotive Design Services Sdn Bhd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automotive Design Services Sdn Bhd filed Critical Automotive Design Services Sdn Bhd
Priority to PCT/MY2007/000059 priority Critical patent/WO2009025541A1/fr
Publication of WO2009025541A1 publication Critical patent/WO2009025541A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • B60N2/809—Head-rests movable or adjustable vertically slidable
    • B60N2/812—Head-rests movable or adjustable vertically slidable characterised by their locking devices
    • B60N2/818—Head-rests movable or adjustable vertically slidable characterised by their locking devices with stepwise positioning

Definitions

  • the present invention relates to a locking device for a height-adjustable headrest, particularly for a motor vehicle seat.
  • the invention enables a user to adjust the height of the headrest vertically relative to the backrest of the seat by manually raising or lowering the headrest without actuating any release mechanism.
  • the headrest of a motor vehicle seat is usually attached to the backrest of the seat and held in position by means of two parallel anchor rods extending from the bottom of the headrest cushion which are inserted into corresponding parallel cylindrical sleeves housed within the inner frame of the backrest. This enables a user to adjust the height of the headrest vertically relative to the backrest of the seat by manually raising or lowering the headrest.
  • a mechanism comprising a locking device which is housed within the inner frame of the backrest and connected to an external release button located between the top of the backrest and the headrest, is commonly employed.
  • Such locking device comprises a releasable latch, which is designed to engage with channels aligned longitudinally along the shaft of one of the anchor rods of the headrest.
  • the channels are designed to ensure that the latch engages firmly with a channel, thereby restricting movement of the anchor rods and preventing the headrest from being lowered without the latch being disengaged from the channel.
  • a user is required to disengage the latch from a channel by manually actuating a release button, usually located between the top of the backrest and the headrest, which causes the latch to be disengaged from the channel, thereby permitting movement of the anchor rods within the cylindrical sleeves.
  • a release button usually located between the top of the backrest and the headrest, which causes the latch to be disengaged from the channel, thereby permitting movement of the anchor rods within the cylindrical sleeves.
  • a locking device requires a user to use both hands to adjust the height of the headrest, one to actuate the release button and the other to adjust the height of the headrest.
  • contemporary designs of headrests which are intended to blend the headrest with the backrest of the seat to achieve a more ergonomic
  • the external release button for the locking device is only accessible to a user from behind the backrest of the seat. This poses an inconvenience to the user as the user is required to turn around whilst seated or leave the seat entirely in order to actuate the release button. In a moving vehicle, such as a bus, this poses not only a risk to the safety of the user, but may also cause inconvenience
  • the present invention discloses a locking device for a height-adjustable headrest for a motor vehicle seat, wherein it is an object of this invention to provide for a simple, convenient, safe and effective mechanism to vertically adjust the height of 20 a headrest.
  • the invention provides for a novel means of locking a headrest in position by securing the anchor rods (5) extending from the bottom of the headrest cushion by means of a locking device comprising a bullet latch (1), a compression spring (2) and a set screw (3).
  • a barrel (4) fitted to one of a pair of parallel cylindrical sleeves (8) housed within the inner frame of the backrest of the seat, which barrel (4) houses the bullet latch (1 ), compression spring (2) and set screw (3).
  • a pair of cylindrical anchor rods (5) extending from the bottom of the headrest cushion, wherein one of the anchor rods is characterised by 30 detents (6) aligned longitudinally along its shaft, which detents (6) correspond diametrically to the head of the bullet latch (1 ).
  • the anchor rods (5) are inserted into free sleeves (7), which are in turn inserted into the cylindrical sleeves (8) and the anchor rods (5) are locked in position by means of the bullet latch (1 ) engaging with a detent (6) along the shaft of an anchor rod (5).
  • the compression spring (2) prevents the bullet latch (1 ) from being disengaged from a detent (6) and the resistance of said compression spring (2) can be adjusted manually by tightening a set screw (3) to achieve the desired degree of resistance to prevent the headrest from being raised or lowered inadvertently.
  • Fig. 1 shows a partial cross-sectional view of the inner frame of a backrest of a motor vehicle seat depicting the anchor rods (5) which extend from the bottom of the headrest cushion inserted into the free sleeves (7), which are in turn inserted into the cylindrical sleeves (8) housed within the inner frame of the backrest and locked in position by means of the invention.
  • Fig. 2 shows an enlarged partial cross-sectional view of one of the anchor rods (5) inserted into a cylindrical sleeve (8) and depicting the invention in the locked position, whereby the bullet latch (1) is engaged with a detent (6).
  • Fig. 3 shows an enlarged partial cross-sectional view of one of the anchor rods (5) inserted into a cylindrical sleeve (8) and depicting the invention in the unlocked position, whereby the bullet latch (1 ) is disengaged from a detent (6).
  • Fig. 4 shows a perspective view of the anchor rods (5) housed within the free sleeves (7), which are in turn inserted into the cylindrical sleeves (8), and depicts the barrel (4) fitted onto one of the cylindrical sleeves (8).
  • the invention is housed within the barrel (4) and is not visible from the drawing.
  • Fig. 1 shows a cross-sectional front view of the inner frame of a backrest of a conventional motor vehicle seat, wherein a pair of cylindrical anchor rods (5) which extend from the bottom of the headrest cushion are inserted into a pair of free sleeves (7).
  • the free sleeves (7) aid in the smooth vertical movement of the anchor rods (5) relative to the backrest of the vehicle seat.
  • the free sleeves (7) are in turn inserted into corresponding parallel cylindrical sleeves (8) housed within and forming part of the inner frame of the backrest.
  • the locking device comprising a bullet latch (1 ), compression spring (2) and set screw (3), is housed and secured within a barrel (4), which is fitted to one of the cylindrical sleeves (8).
  • the barrel (4) may be fitted to a cylindrical sleeve (8) in a number of ways, for example by means of welding or riveting the barrel (4) to the cylindrical sleeve (8).
  • the shaft of the anchor rod (5) depicted therein is characterised by detents (6), which are aligned longitudinally along its shaft.
  • the detents (6) may be applied to the shaft of an anchor rod (5) by means of a metal stamping or machining process.
  • the detents (6) are intended to correspond diametrically with the head of the bullet latch (1 ) such that when the anchor rods (5) are inserted into the free sleeves (7), as shown in Fig. 1 , the bullet latch (1 ) engages with a detent (6) on the shaft of an anchor rod (5), as shown in Fig. 2, thus locking the anchor rod (5) in position.
  • the detents (6) are aligned longitudinally along the shaft of an anchor rod (5) to enable the anchor rod (5) to be locked in position at different levels, thus enabling the height of the headrest to be adjusted vertically.
  • FIG. 3 which depicts the invention in the unlocked position, shows how the position of an anchor rod (5) may be adjusted vertically by disengaging the bullet latch (1 ) from a detent (6) and engaging it with another detent (6), either at a higher or lower level along the shaft of the anchor rod (5).
  • the detents (6) are applied to the shaft of only one of the anchor rods (5) of the headrest as this is adequate to secure the anchor rods (5) in position and prevent vertical movement of the anchor rods (5). However, this does not preclude the detents (6) from being applied to the shafts of both anchor rods (5) to achieve a greater degree of resistance, if this is desired.
  • the compression spring (2) prevents the bullet latch (1 ) from being disengaged from a detent (6), and the degree of resistance of the compression spring (2) can be adjusted manually by means of a set screw (3) to achieve the desired degree of resistance.
  • the ideal degree of resistance to enable a user to adjust the height of the headrest with a single hand and without actuating any separate release mechanism, is between 5kg to 8kg of force. This degree of resistance also ensures that the bullet latch (1 ) is not disengaged from a detent (6) inadvertently by a user.
  • the desired degree of resistance can also be achieved by alternative means, for example by utilising set screws of different lengths or by utilising compression springs with different degrees of resistance.
  • the head of the bullet latch (1) and the detents (6) along the shaft of the anchor rod (5) are diametrically correspondent to facilitate engagement and disengagement of the bullet latch (1 ) with a detent (6).
  • the circular head of the bullet latch (1 ) also minimises friction between the bullet latch (1 ) and the shaft of the anchor rod (5), thus enabling the bullet latch (1 ) to be moved easily from one detent (6) to another detent (6) along the shaft of the anchor rod (5).
  • the use of the present invention as disclosed is not limited to a locking device for a height-adjustable headrest of a motor vehicle seat.
  • the present invention can also be applied in a multitude of components, including without limitation other components of a vehicle or aircraft seat such as adjustable arm rests and adjustable foot rests, wherein the height or length, as the case may be, of such components is adjustable and where a locking device is utilised to secure such components in position.
  • the present invention can also be applied as a locking mechanism to secure optional accessories for such seats, such as meal trays.
  • the invention is not limited to the illustrative embodiments which have been shown above, but can be freely modified within the scope of the following patent claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)

Abstract

L'invention concerne un dispositif de verrouillage pour un appui-tête réglable en hauteur, notamment pour un siège de véhicule à moteur, comprenant un loquet (1), un ressort de compression (2) et une vis de serrage (3). Le dispositif de verrouillage est logé dans un corps (4) ajusté sur un manchon constituant une paire de manchons cylindriques parallèles (8) logée dans la structure interne du dossier du siège. La tête dudit loquet (1) correspond diamétralement à des encliquetages (6) alignés longitudinalement le long de l'arbre d'une tige constituant une paire de tiges d'ancrage cylindriques (5) s'étendant depuis le fond du coussin d'appui-tête. L'appui-tête est verrouillé en position lorsque lesdites tiges d'ancrage (5) sont insérées dans des manchons libres (7), qui sont à leur tour insérés dans lesdits manchons cylindriques (8) et ledit loquet (1) vient en prise avec un encliquetage (6) fixant ainsi les tiges d'ancrage (5). Le ressort de compression (2) empêche ledit loquet (1) de se libérer d'un encliquetage (6) et la résistance dudit ressort de compression (2) peut être réglée manuellement en resserrant ladite vis de serrage (3) afin d'obtenir le degré de résistance souhaité. Le dispositif de verrouillage peut être déverrouillé lorsqu'une force suffisante supérieure ou égale au niveau de résistance dudit ressort de compression (2) est exercée par un utilisateur de sorte que ledit loquet (1) se libère d'un encliquetage (6).
PCT/MY2007/000059 2007-08-20 2007-08-20 Dispositif de verrouillage pour appui-tête réglable WO2009025541A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/MY2007/000059 WO2009025541A1 (fr) 2007-08-20 2007-08-20 Dispositif de verrouillage pour appui-tête réglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/MY2007/000059 WO2009025541A1 (fr) 2007-08-20 2007-08-20 Dispositif de verrouillage pour appui-tête réglable

Publications (1)

Publication Number Publication Date
WO2009025541A1 true WO2009025541A1 (fr) 2009-02-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2007/000059 WO2009025541A1 (fr) 2007-08-20 2007-08-20 Dispositif de verrouillage pour appui-tête réglable

Country Status (1)

Country Link
WO (1) WO2009025541A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011020919A1 (fr) 2009-08-20 2011-02-24 Virgin Atlantic Airways Limited Appuie-tête
DE102015016657A1 (de) * 2015-12-19 2017-07-06 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Kopfstützenanordung für ein Kraftfahrzeug
CN115404859A (zh) * 2022-08-12 2022-11-29 中建八局第一建设有限公司 一种新型的压力型预应力抗浮锚杆及其施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29722639U1 (de) * 1996-12-23 1998-04-02 Peter Butz Gmbh & Co Verwaltungs-Kg, 40764 Langenfeld Rückstellfederbelastete Betätigungsvorrichtung für Kraftfahrzeugausstattungsteile, wie für Kopfstütze o.dgl.
US6062645A (en) * 1998-12-14 2000-05-16 Del-Met Corporation Headrest support assembly
EP0822117B1 (fr) * 1996-07-31 2000-06-07 Bertrand Faure Equipements S.A. Siège de véhicule comportant un appui-tête, et appui-tête pour siège de véhicule
DE102004062133A1 (de) * 2004-12-23 2006-07-06 Faurecia Autositze Gmbh & Co. Kg Kraftfahrzeug-Fondsitz mit wenigstens zwei vorklappbaren, miteinander verriegelbaren Fondlehnenteilen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0822117B1 (fr) * 1996-07-31 2000-06-07 Bertrand Faure Equipements S.A. Siège de véhicule comportant un appui-tête, et appui-tête pour siège de véhicule
DE29722639U1 (de) * 1996-12-23 1998-04-02 Peter Butz Gmbh & Co Verwaltungs-Kg, 40764 Langenfeld Rückstellfederbelastete Betätigungsvorrichtung für Kraftfahrzeugausstattungsteile, wie für Kopfstütze o.dgl.
US6062645A (en) * 1998-12-14 2000-05-16 Del-Met Corporation Headrest support assembly
DE102004062133A1 (de) * 2004-12-23 2006-07-06 Faurecia Autositze Gmbh & Co. Kg Kraftfahrzeug-Fondsitz mit wenigstens zwei vorklappbaren, miteinander verriegelbaren Fondlehnenteilen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011020919A1 (fr) 2009-08-20 2011-02-24 Virgin Atlantic Airways Limited Appuie-tête
DE102015016657A1 (de) * 2015-12-19 2017-07-06 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Kopfstützenanordung für ein Kraftfahrzeug
US10017084B2 (en) 2015-12-19 2018-07-10 GM Global Technology Operations LLC Head rest for a motor vehicle
CN115404859A (zh) * 2022-08-12 2022-11-29 中建八局第一建设有限公司 一种新型的压力型预应力抗浮锚杆及其施工方法
CN115404859B (zh) * 2022-08-12 2023-07-11 中建八局第一建设有限公司 一种新型的压力型预应力抗浮锚杆及其施工方法

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