WO2012015203A2 - Headrest for vehicle - Google Patents

Headrest for vehicle Download PDF

Info

Publication number
WO2012015203A2
WO2012015203A2 PCT/KR2011/005461 KR2011005461W WO2012015203A2 WO 2012015203 A2 WO2012015203 A2 WO 2012015203A2 KR 2011005461 W KR2011005461 W KR 2011005461W WO 2012015203 A2 WO2012015203 A2 WO 2012015203A2
Authority
WO
WIPO (PCT)
Prior art keywords
movable body
headrest
link
support
coupling pin
Prior art date
Application number
PCT/KR2011/005461
Other languages
French (fr)
Other versions
WO2012015203A3 (en
Inventor
Hae Il Jeong
Original Assignee
Woobo Tech Co., Ltd.
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 Woobo Tech Co., Ltd. filed Critical Woobo Tech Co., Ltd.
Publication of WO2012015203A2 publication Critical patent/WO2012015203A2/en
Publication of WO2012015203A3 publication Critical patent/WO2012015203A3/en

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80Head-rests
    • B60N2/806Head-rests movable or adjustable
    • B60N2/865Head-rests movable or adjustable providing a fore-and-aft movement with respect to the occupant's head
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80Head-rests
    • B60N2/888Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

Definitions

  • the present invention relates, in general, to headrests for vehicles and, more particularly, to a headrest for a vehicle which can move with respect to a seat not only in the vertical direction but also in the horizontal direction.
  • headrests are head supports provided on upper ends of seatbacks of vehicles to support the heads of users.
  • the function of such a headrest is to support the back part of the head of a user to prevent the neck of the user from being injured.
  • a technique for moving the headrest was recently proposed, which can move a headrest forwards to support the head of a user at a position as close to the back part of the head of the user as possible.
  • a conventional headrest was configured such that stay rods are bent in stages, the headrest itself just moved forwards, or movable plates constituting the headrest move away from each other in opposite directions.
  • the stay rods In the case of the bending of the stay rods, using it over a long period of time fatigues the stay rods. Thus, there is a probability of damage to the stay rods, and the headrest cannot reliably support the back part of the head of the user. Furthermore, in the case where the headrest itself moves, the distance that the headrest moves forwards is limited to a range given by the volume of the headrest. In other words, there is a limit as to by how much the distance that the headrest moves forwards can be increased. In the case where the movable plates move in opposite directions, a portion of the headrest also moves rearwards, thus obstructing the field of vision of passengers who are seated on the back seats.
  • Patent Document 1 Korean Patent Laid-open Publication Nos. KR2009-0118219, KR2009-0059439, KR2008-0084553, KR2007-0061335, Korean Patent Registration No. KR0101357
  • an object of the present invention is to provide a headrest for a vehicle which can maximize the distance that the headrest moves forwards, and has a reduced volume.
  • the present invention provides a headrest for a vehicle, including: a first movable body; a second movable body; a support body provided between the first movable body and the second movable body, the support body having a support guide bracket; a first link hinged at a first end thereof to the first movable body; a second link hinged at a first end thereof to the second movable body; a center coupling pin rotatably coupling a second end of the first link to a second end of the second link; and a guide slot having a predetermined radius of curvature and formed in the support guide bracket, the guide slot providing a path along which the center coupling pin moves.
  • the headrest may further include: an insert boss protruding from the first movable body rearwards; and a receiving boss protruding from the second movable body forwards and receiving the insert boss therein.
  • the headrest may further include: a latch provided under a lower surface of the insert boss; and a rotary member coupled to the support body by a rotary shaft, the rotary member having a locking protrusion located ahead of the rotary shaft, the locking protrusion engaging with the latch.
  • the first link and the second link may rotate in directions opposite to each other.
  • the present invention has the following effects.
  • the distance that a headrest moves forwards can be maximized, and the headrest given a reduced volume.
  • the headrest itself moves forwards and, simultaneously, the distance that the headrest moves forwards can be further ensured by the volume defined by a front cover and a rear cover
  • the set position of the headrest can be easily adjusted by manipulating the rear cover, the front cover or a button unit.
  • the headrest can reliably support and protect the head and neck of a user.
  • FIG. 1 is a perspective view of a headrest for a vehicle, according to a preferred embodiment of the present invention
  • FIG. 2 is an exploded front perspective view of FIG. 1;
  • FIG. 3 is an exploded rear perspective view of FIG. 1;
  • FIG. 4 is an exploded front perspective view of a movable body of FIG. 1;
  • FIG. 5 is an exploded rear perspective view of a movable body of FIG. 1;
  • FIG. 6 is an enlarged view of the circled portion A of FIG. 5;
  • FIG. 7 is a sectional view of the movable body of FIG. 1;
  • FIG. 8 is a sectional view of the movable body of FIG. 1;
  • FIG. 9 is a sectional view of the movable body of FIG. 1.
  • FIG. 1 is a perspective view of a headrest for a vehicle, according to the preferred embodiment of the present invention.
  • FIG. 2 is an exploded front perspective view of FIG. 1.
  • FIG. 3 is an exploded rear perspective view of FIG. 1.
  • FIG. 4 is an exploded front perspective view of a movable body of FIG. 1.
  • FIG. 5 is an exploded rear perspective view of a movable body of FIG. 1.
  • FIG. 6 is an enlarged view of the circled portion A of FIG. 5.
  • FIG. 7 is a sectional view of the movable body of FIG. 1.
  • FIG. 8 is a sectional view of the movable body of FIG. 1.
  • FIG. 9 is a sectional view of the movable body of FIG. 1.
  • front or “forward” denote a side of a front cover 100
  • rear or “rearward” denotes a side of a rear cover 800.
  • the headrest for vehicles includes the front cover 100, and the rear cover 800 which is contained in the front cover 100.
  • Stay rods 950 are coupled to a lower portion of the headrest so that the headrest is mounted to a seat by the stay rods 950.
  • a first movable body 200 is installed in the front cover 100.
  • a second movable body 700 is installed in the rear cover 800.
  • a support body 500 is provided between the first movable body 200 and the second movable body 700.
  • the front cover 100 has a container shape with an opening 110.
  • First slots 120 are formed in a lower surface of the front cover 100.
  • the first movable body 200 is inserted into the opening 110 of the front cover 100 and includes a front plate 210 provided with a plurality of ribs 260.
  • an insert boss 220 protrudes rearwards from a central portion of the front plate 210.
  • the insert boss 220 has a post shape having a rectangular cross-section.
  • a latch 270 is provided on a lower surface of the insert boss 220.
  • the latch 270 has a plurality of teeth 271 which are spaced apart from each other at regular intervals.
  • First connection brackets 240 to which first ends of respective first links 610 (to be explained later herein) are coupled are provided on the front plate 210.
  • the number of first connection brackets 240 corresponds to that of the first links 610.
  • two first links 610 are provided at left and right sides, and two first connection brackets 240 are thus also provided at left and right sides corresponding to the first links 610.
  • Button holes 250a and 250b are respectively formed in a side surface of the front cover 100 and a side surface of the first movable body 200.
  • a central portion of the support body 500 has an insert hole 510.
  • Support poles 520 are provided on opposite side surfaces of the support body 500.
  • Support guide brackets 530 extend upwards from the support body 500 on opposite sides of the insert hole 510.
  • a guide slot 550 is formed in each support guide bracket 530.
  • the guide slot 550 is curved at a predetermined radius of curvature and extends a circumferential length corresponding to a central angle of 90° from an upper rear side of the support guide bracket 530 to a lower front side thereof.
  • a mounting slot 540 is formed in a lower portion of the support body 500.
  • a traction plate 300 which will be explained later in detail is inserted into the mounting slot 540.
  • the traction plate 300 has, in both ends 330 thereof, insert holes 310 which have shapes corresponding to the cross-sections of the support poles 520.
  • the stay rods 950 are inserted into the respective insert holes 310.
  • a coupling piece 320 protrudes downwards from a medial portion of the traction plate 300 so that a wire 352 of a wire assembly 350 which will be explained later is coupled to the coupling piece 320.
  • a rotary member 400 is rotatably installed between the latch 270 and the traction plate 300.
  • the rotary member 400 is rotatably coupled to the support body 500 by a rotary shaft 410.
  • the rotary member 400 has at a predetermined position a stop protrusion 430 which is stopped by the coupling piece 320.
  • a support protrusion 450 is provided on the rotary member 400 at a position spaced apart from the stop protrusion 430 to 90° in a counterclockwise direction.
  • the support protrusion 450 is coupled to the support body 500 by a spring 440.
  • a locking protrusion 420 protrudes from the rotary member 400 forwards and upwards ahead of the rotary shaft 410.
  • the locking protrusion 420 engages with the teeth 271 of the latch 270 so that the first movable body 200 is allowed to move forwards but is restrained from moving rearwards.
  • the headrest of the present invention further includes link units 600 which connect the first movable body 200, the support body 500 and the second movable body 700 to each other.
  • link units 600 are disposed at left and right sides.
  • Each link unit 600 includes the first link 610 and a second link 650.
  • the first link 610 is hinged at a first end thereof to the corresponding first connection bracket 240 of the first movable body 200 by a first coupling pin 611 and a first nut 612. The first nut 612 is tightened over the end of the first coupling pin 611.
  • the second link 650 is hinged at a first end thereof to a corresponding second connection bracket 740 of the second movable body 700 by a second coupling pin 651 and a second nut 652.
  • the second nut 652 is tightened over the end of the second coupling pin 651.
  • a second end of the first link 610 is hinged to a second end of the second link 650 by a center coupling pin 630.
  • a center nut 635 is tightened over the end of the center coupling pin 630.
  • the center coupling pin 630 moves along the guide slot 550 of the corresponding support guide bracket 530 between the upper rear side and the lower front side.
  • the first link 610 is longer than the second link 650 so that the distance that the first movable body 200 can moves forwards is greater than that of the second movable body 700.
  • the second movable body 700 includes a rectangular rear plate 710.
  • a receiving boss 720 protrudes forwards from a central portion of the rear plate 710.
  • the insert boss 220 is inserted into the receiving boss 720 and is movable with respect to the receiving boss 720 forwards and rearwards depending on forward and rearward movement of the first and second movable bodies 200 and 700.
  • a slot 723 is formed in a lower surface of the receiving boss 720.
  • the slot 723 functions as a path along which the latch 270 of the insert boss 220 moves.
  • a plurality of ribs 760 are provided on the rear plate 710 of the second movable body 700 in vertical and horizontal directions.
  • the second connection bracket 740 is provided on the rear plate 710 so that the second link 650 is hinged to the second movable body 700 by the second connection bracket 740.
  • the wire assembly 350 includes a force transmission member 351 which is disposed at a position at which it is brought into contact with an end of a button 910.
  • the wire 352 is coupled to the force transmission member 351.
  • the wire 352 is covered with a protective tube 353.
  • a first end of the protective tube 353 is disposed adjacent to the force transmission member 351, and a second end thereof is disposed adjacent to the coupling piece 320 of the traction plate 300.
  • the button 910 pushes a corresponding portion of the force transmission member 351
  • the wire 352 is pulled which pulls the coupling piece 320 of the traction plate 300.
  • the traction plate 300 is moved rearwards.
  • the coupling piece 320 moves the stop protrusion 430 of the rotary member 400 rearwards. Then, the rotary member 400 rotates in the counterclockwise direction. As the rotary member 400 rotates in the counterclockwise direction, the locking protrusion 420 which has been engaged with the teeth 271 of the latch 270 is also rotated in the counterclockwise direction so that the engagement therebetween is released.
  • the first slots 120, the second slots 230 and third slots 830 receive the stay rods 950 so as to allow the first movable body 200 and the second movable body 700 to move forwards and rearwards.
  • the insert hole 510 functions as a passage through which the receiving boss 720 passes.
  • the insert boss 220 is inserted into the receiving boss 720.
  • the four surfaces of the receiving boss 720 face the four corresponding surfaces of the insert hole 510.
  • the four surfaces of the insert boss 220 which are inserted into the receiving boss 720 face the four corresponding surfaces of the receiving boss 720.
  • a latch slot 515 along which the latch 270 moves forwards and rearwards is formed in the lower surface of the insert hole 510.
  • first movable body 200 and the second movable body 700 can move forwards and rearwards horizontally.
  • the first connection brackets 240 are located on a central portion of the front plate 210 of the first movable body 200.
  • the second connection brackets 740 are located on an upper portion of the rear plate 710 of the second movable body 700.
  • each support guide bracket 530 is provided between the corresponding first and second links 610 and 650.
  • the support guide bracket 530 is coupled to the first and second links 610 and 650 by inserting the center coupling pin 630 into the guide slot of the support guide bracket 530 and holes that are respectively formed through the first and second links 610 and 650.
  • each support guide bracket 530 has the guide slot 550 having a predetermined radius of curvature.
  • the guide slot 550 includes a first slot end 551 which is located at an upper rear side, and a second slot end 553 which is located at a lower front side.
  • the center coupling pin 630 moves between the first slot end 551 and the second slot end 553.
  • the predetermined radius of curvature is given between the first slot end 551 and the second slot end 553.
  • the radius of curvature of the guide slot 550 around the first slot end 551 and the second slot end 553 is less than that of the medial portion of the guide slot 550 between first slot end 551 and the second slot end 553.
  • FIGS. 7 through 9 illustrate the movement positions of the first movable body 200 and the second movable body 700 in relation to the movement position of the center coupling pin 630.
  • reference character L1 denotes a length from the front surface of the front plate 210 of the first movable body 200 to the rear end of the stay rod 950.
  • Reference character L2 denotes a length from the rear surface of the rear plate 710 of the second movable body 700 to the rear end of the stay rod 950.
  • reference character ⁇ denotes an angle between the first link 610 and the second link 650.
  • the angle ⁇ forms an acute angle.
  • the angle ⁇ forms an obtuse angle.
  • L1 lengthens compared to its length when the center coupling pin 630 is located at the first slot end 551, but L2 is shorter compared to when the center coupling pin 630 is located at the first slot end 551.
  • both the first movable body 200 and the second movable body 700 move forwards, wherein the distance that the first movable body 200 moves forwards is longer than the distance that the second movable body 700 moves forwards.
  • L1 further lengthens compared to when the center coupling pin 630 is located between the first slot end 551 and the second slot end 553.
  • L2 further shortens compared to when the center coupling pin 630 is located between the first slot end 551 and the second slot end 553.
  • the second movable body 700 that is coupled to the rear cover 800 is moved forwards.
  • the center coupling pin 630 moves from the first slot end 551 to the second slot end 553 along the guide slot 550.
  • the first link 610 rotates around the center coupling pin 630 in the clockwise direction indicated by the arrow R1.
  • the second link 650 rotates around the center coupling pin 630 in the counterclockwise direction indicated by the arrow R2.
  • the first link 610 which is coupled to the first movable body 200 moves the first movable body 200 forwards.
  • the latch 270 When the first movable body 200 moves forwards, the latch 270 also moves forwards along with the first movable body 200, and the tooth 271 of the latch 270 that has engaged with the locking protrusion 420 rotates the rotary member 400 before a subsequent tooth 271 engages with the locking protrusion 420 to prevent the first movable body 200 from undesirably moving rearwards.
  • both the first movable body 200 and the second movable body 700 move forwards with respect to the stay rods 950 in such a way that the distance that the headrest moves forwards is maximized by increasing the distance between the first movable body 200 and the second movable body 700.
  • the button 910 of a button unit 900 when the button 910 of a button unit 900 is pressed to reduce the volume of the headrest, the button 910 pushes the force transmission member 351 of the wire assembly 350 which is coupled to a first end of the wire 352. Thereby, the wire 352 is pulled. Then, the coupling piece 320 of the traction plate 300 which is coupled to a second end of the wire 352 is moved rearwards so that the rotary member 400 rotates in the counterclockwise direction. When the rotary member 400 rotates in the counterclockwise direction, the engagement between the locking protrusion 420 and the teeth 271 of the latch 270 is released. Then, the front cover 100 is allowed to be pushed rearwards so that the first movable body 200 overlaps the second movable body 700, thus reducing the volume of the headrest.
  • the button 910 is released so that the rotary member 400 is locked to the latch 270 again.

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

A headrest for a vehicle is disclosed. The headrest includes a first movable body (200) and a second movable body (700). A support body (500) is provided between the first movable body and the second movable body and has a support guide bracket. A first link (610) is hinged at a first end thereof to the first movable body. A second link (650) is hinged at a first end thereof to the second movable body. A center coupling pin (630) rotatably couples a second end of the first link to a second end of the second link. A guide slot (550) having a predetermined radius of curvature is formed in the support guide bracket. The guide slot provides a path along which the center coupling pin moves. The headrest has a reduced volume, and the distance that the headrest moves forwards can be maximized.

Description

HEADREST FOR VEHICLE
The present invention relates, in general, to headrests for vehicles and, more particularly, to a headrest for a vehicle which can move with respect to a seat not only in the vertical direction but also in the horizontal direction.
Generally, headrests are head supports provided on upper ends of seatbacks of vehicles to support the heads of users. When a vehicle collision occurs, the function of such a headrest is to support the back part of the head of a user to prevent the neck of the user from being injured.
A technique for moving the headrest was recently proposed, which can move a headrest forwards to support the head of a user at a position as close to the back part of the head of the user as possible. To realize the technique, a conventional headrest was configured such that stay rods are bent in stages, the headrest itself just moved forwards, or movable plates constituting the headrest move away from each other in opposite directions.
However, in the case of the bending of the stay rods, using it over a long period of time fatigues the stay rods. Thus, there is a probability of damage to the stay rods, and the headrest cannot reliably support the back part of the head of the user. Furthermore, in the case where the headrest itself moves, the distance that the headrest moves forwards is limited to a range given by the volume of the headrest. In other words, there is a limit as to by how much the distance that the headrest moves forwards can be increased. In the case where the movable plates move in opposite directions, a portion of the headrest also moves rearwards, thus obstructing the field of vision of passengers who are seated on the back seats.
[Prior Art Documents]
[Patent Documents]
(Patent Document 1) Korean Patent Laid-open Publication Nos. KR2009-0118219, KR2009-0059439, KR2008-0084553, KR2007-0061335, Korean Patent Registration No. KR0101357
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a headrest for a vehicle which can maximize the distance that the headrest moves forwards, and has a reduced volume.
In order to accomplish the above object, the present invention provides a headrest for a vehicle, including: a first movable body; a second movable body; a support body provided between the first movable body and the second movable body, the support body having a support guide bracket; a first link hinged at a first end thereof to the first movable body; a second link hinged at a first end thereof to the second movable body; a center coupling pin rotatably coupling a second end of the first link to a second end of the second link; and a guide slot having a predetermined radius of curvature and formed in the support guide bracket, the guide slot providing a path along which the center coupling pin moves.
The headrest may further include: an insert boss protruding from the first movable body rearwards; and a receiving boss protruding from the second movable body forwards and receiving the insert boss therein.
The headrest may further include: a latch provided under a lower surface of the insert boss; and a rotary member coupled to the support body by a rotary shaft, the rotary member having a locking protrusion located ahead of the rotary shaft, the locking protrusion engaging with the latch.
The first link and the second link may rotate in directions opposite to each other.
The present invention has the following effects.
First, the distance that a headrest moves forwards can be maximized, and the headrest given a reduced volume.
Second, the headrest itself moves forwards and, simultaneously, the distance that the headrest moves forwards can be further ensured by the volume defined by a front cover and a rear cover
Third, the set position of the headrest can be easily adjusted by manipulating the rear cover, the front cover or a button unit.
Fourth, when a vehicle collision occurs, the headrest can reliably support and protect the head and neck of a user.
FIG. 1 is a perspective view of a headrest for a vehicle, according to a preferred embodiment of the present invention;
FIG. 2 is an exploded front perspective view of FIG. 1;
FIG. 3 is an exploded rear perspective view of FIG. 1;
FIG. 4 is an exploded front perspective view of a movable body of FIG. 1;
FIG. 5 is an exploded rear perspective view of a movable body of FIG. 1;
FIG. 6 is an enlarged view of the circled portion A of FIG. 5;
FIG. 7 is a sectional view of the movable body of FIG. 1;
FIG. 8 is a sectional view of the movable body of FIG. 1; and
FIG. 9 is a sectional view of the movable body of FIG. 1.
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.
FIG. 1 is a perspective view of a headrest for a vehicle, according to the preferred embodiment of the present invention. FIG. 2 is an exploded front perspective view of FIG. 1. FIG. 3 is an exploded rear perspective view of FIG. 1. FIG. 4 is an exploded front perspective view of a movable body of FIG. 1. FIG. 5 is an exploded rear perspective view of a movable body of FIG. 1. FIG. 6 is an enlarged view of the circled portion A of FIG. 5. FIG. 7 is a sectional view of the movable body of FIG. 1. FIG. 8 is a sectional view of the movable body of FIG. 1. FIG. 9 is a sectional view of the movable body of FIG. 1.
In this specification, for the purpose of describing the preferred embodiment, based on FIG. 2, the term “front” or “forward” denote a side of a front cover 100, and the term “rear” or “rearward” denotes a side of a rear cover 800.
Referring to FIG. 1, the headrest for vehicles according to the preferred embodiment of the present invention includes the front cover 100, and the rear cover 800 which is contained in the front cover 100. Stay rods 950 are coupled to a lower portion of the headrest so that the headrest is mounted to a seat by the stay rods 950.
Referring to FIGS. 2 and 3, a first movable body 200 is installed in the front cover 100. A second movable body 700 is installed in the rear cover 800. A support body 500 is provided between the first movable body 200 and the second movable body 700.
The front cover 100 has a container shape with an opening 110. First slots 120 are formed in a lower surface of the front cover 100.
The first movable body 200 is inserted into the opening 110 of the front cover 100 and includes a front plate 210 provided with a plurality of ribs 260.
Further, an insert boss 220 protrudes rearwards from a central portion of the front plate 210. The insert boss 220 has a post shape having a rectangular cross-section. A latch 270 is provided on a lower surface of the insert boss 220. The latch 270 has a plurality of teeth 271 which are spaced apart from each other at regular intervals.
First connection brackets 240 to which first ends of respective first links 610 (to be explained later herein) are coupled are provided on the front plate 210. The number of first connection brackets 240 corresponds to that of the first links 610. In this embodiment, two first links 610 are provided at left and right sides, and two first connection brackets 240 are thus also provided at left and right sides corresponding to the first links 610.
Button holes 250a and 250b are respectively formed in a side surface of the front cover 100 and a side surface of the first movable body 200.
Furthermore, a central portion of the support body 500 has an insert hole 510. Support poles 520 are provided on opposite side surfaces of the support body 500. Support guide brackets 530 extend upwards from the support body 500 on opposite sides of the insert hole 510.
A guide slot 550 is formed in each support guide bracket 530. The guide slot 550 is curved at a predetermined radius of curvature and extends a circumferential length corresponding to a central angle of 90° from an upper rear side of the support guide bracket 530 to a lower front side thereof.
A mounting slot 540 is formed in a lower portion of the support body 500. A traction plate 300 which will be explained later in detail is inserted into the mounting slot 540.
The traction plate 300 has, in both ends 330 thereof, insert holes 310 which have shapes corresponding to the cross-sections of the support poles 520. The stay rods 950 are inserted into the respective insert holes 310. A coupling piece 320 protrudes downwards from a medial portion of the traction plate 300 so that a wire 352 of a wire assembly 350 which will be explained later is coupled to the coupling piece 320.
Meanwhile, a rotary member 400 is rotatably installed between the latch 270 and the traction plate 300. The rotary member 400 is rotatably coupled to the support body 500 by a rotary shaft 410. The rotary member 400 has at a predetermined position a stop protrusion 430 which is stopped by the coupling piece 320. A support protrusion 450 is provided on the rotary member 400 at a position spaced apart from the stop protrusion 430 to 90° in a counterclockwise direction. The support protrusion 450 is coupled to the support body 500 by a spring 440.
Furthermore, a locking protrusion 420 protrudes from the rotary member 400 forwards and upwards ahead of the rotary shaft 410. The locking protrusion 420 engages with the teeth 271 of the latch 270 so that the first movable body 200 is allowed to move forwards but is restrained from moving rearwards.
When the wire 352 pulls the coupling piece 320 rearwards, the stop protrusion 430 which has been in contact with the stop protrusion 430 is moved rearwards along with the coupling piece 320 so that the rotary member 400 rotates in a counterclockwise direction. When the rotary member 400 rotates in the counterclockwise direction, the spring 440 is extended, and the engagement between the locking protrusion 420 and the teeth 271 of the latch 270 is released.
Meanwhile, the headrest of the present invention further includes link units 600 which connect the first movable body 200, the support body 500 and the second movable body 700 to each other. In this embodiment, two link units 600 are disposed at left and right sides. Each link unit 600 includes the first link 610 and a second link 650.
The first link 610 is hinged at a first end thereof to the corresponding first connection bracket 240 of the first movable body 200 by a first coupling pin 611 and a first nut 612. The first nut 612 is tightened over the end of the first coupling pin 611.
The second link 650 is hinged at a first end thereof to a corresponding second connection bracket 740 of the second movable body 700 by a second coupling pin 651 and a second nut 652. The second nut 652 is tightened over the end of the second coupling pin 651.
A second end of the first link 610 is hinged to a second end of the second link 650 by a center coupling pin 630. A center nut 635 is tightened over the end of the center coupling pin 630.
The center coupling pin 630 moves along the guide slot 550 of the corresponding support guide bracket 530 between the upper rear side and the lower front side.
The first link 610 is longer than the second link 650 so that the distance that the first movable body 200 can moves forwards is greater than that of the second movable body 700.
The second movable body 700 includes a rectangular rear plate 710.
Further, a receiving boss 720 protrudes forwards from a central portion of the rear plate 710.
The insert boss 220 is inserted into the receiving boss 720 and is movable with respect to the receiving boss 720 forwards and rearwards depending on forward and rearward movement of the first and second movable bodies 200 and 700.
Furthermore, a slot 723 is formed in a lower surface of the receiving boss 720. The slot 723 functions as a path along which the latch 270 of the insert boss 220 moves.
A plurality of ribs 760 are provided on the rear plate 710 of the second movable body 700 in vertical and horizontal directions. The second connection bracket 740 is provided on the rear plate 710 so that the second link 650 is hinged to the second movable body 700 by the second connection bracket 740.
The wire assembly 350 includes a force transmission member 351 which is disposed at a position at which it is brought into contact with an end of a button 910. The wire 352 is coupled to the force transmission member 351.
The wire 352 is covered with a protective tube 353. A first end of the protective tube 353 is disposed adjacent to the force transmission member 351, and a second end thereof is disposed adjacent to the coupling piece 320 of the traction plate 300.
When the button 910 pushes a corresponding portion of the force transmission member 351, the wire 352 is pulled which pulls the coupling piece 320 of the traction plate 300. Thereby, the traction plate 300 is moved rearwards.
When the traction plate 300 moves rearwards, the coupling piece 320 moves the stop protrusion 430 of the rotary member 400 rearwards. Then, the rotary member 400 rotates in the counterclockwise direction. As the rotary member 400 rotates in the counterclockwise direction, the locking protrusion 420 which has been engaged with the teeth 271 of the latch 270 is also rotated in the counterclockwise direction so that the engagement therebetween is released.
The first slots 120, the second slots 230 and third slots 830 receive the stay rods 950 so as to allow the first movable body 200 and the second movable body 700 to move forwards and rearwards.
Referring to FIGS. 4 and 5, the insert hole 510 functions as a passage through which the receiving boss 720 passes. The insert boss 220 is inserted into the receiving boss 720.
Four surfaces of the receiving boss 720 face the four corresponding surfaces of the insert hole 510. The four surfaces of the insert boss 220 which are inserted into the receiving boss 720 face the four corresponding surfaces of the receiving boss 720.
Further, a latch slot 515 along which the latch 270 moves forwards and rearwards is formed in the lower surface of the insert hole 510.
Hereby, the first movable body 200 and the second movable body 700 can move forwards and rearwards horizontally.
The first connection brackets 240 are located on a central portion of the front plate 210 of the first movable body 200. The second connection brackets 740 are located on an upper portion of the rear plate 710 of the second movable body 700.
Referring to FIG. 6, each support guide bracket 530 is provided between the corresponding first and second links 610 and 650. The support guide bracket 530 is coupled to the first and second links 610 and 650 by inserting the center coupling pin 630 into the guide slot of the support guide bracket 530 and holes that are respectively formed through the first and second links 610 and 650.
As stated above, each support guide bracket 530 has the guide slot 550 having a predetermined radius of curvature. The guide slot 550 includes a first slot end 551 which is located at an upper rear side, and a second slot end 553 which is located at a lower front side.
The center coupling pin 630 moves between the first slot end 551 and the second slot end 553. The predetermined radius of curvature is given between the first slot end 551 and the second slot end 553.
The radius of curvature of the guide slot 550 around the first slot end 551 and the second slot end 553 is less than that of the medial portion of the guide slot 550 between first slot end 551 and the second slot end 553.
FIGS. 7 through 9 illustrate the movement positions of the first movable body 200 and the second movable body 700 in relation to the movement position of the center coupling pin 630. In these drawings, reference character L1 denotes a length from the front surface of the front plate 210 of the first movable body 200 to the rear end of the stay rod 950. Reference character L2 denotes a length from the rear surface of the rear plate 710 of the second movable body 700 to the rear end of the stay rod 950. Further, reference character α denotes an angle between the first link 610 and the second link 650.
As shown in FIG. 7, when the center coupling pin 630 is located at the first slot end 551 of the guide slot 550, the angle α forms an acute angle.
As shown in FIG. 8, when the center coupling pin 630 is located between the first slot end 551 and the second slot end 553, the angle α forms an obtuse angle. Further, L1 lengthens compared to its length when the center coupling pin 630 is located at the first slot end 551, but L2 is shorter compared to when the center coupling pin 630 is located at the first slot end 551.
In other words, both the first movable body 200 and the second movable body 700 move forwards, wherein the distance that the first movable body 200 moves forwards is longer than the distance that the second movable body 700 moves forwards.
As shown in FIG. 9, when the center coupling pin 630 is located at the second slot end 553, the angle α forms an obtuse angle. L1 further lengthens compared to when the center coupling pin 630 is located between the first slot end 551 and the second slot end 553. L2 further shortens compared to when the center coupling pin 630 is located between the first slot end 551 and the second slot end 553.
The operation of the headrest for a vehicle according to the preferred embodiment of the present invention will be explained.
When the rear cover 800 of the headrest is pushed forwards, the second movable body 700 that is coupled to the rear cover 800 is moved forwards. The center coupling pin 630 moves from the first slot end 551 to the second slot end 553 along the guide slot 550. Then, the first link 610 rotates around the center coupling pin 630 in the clockwise direction indicated by the arrow R1. The second link 650 rotates around the center coupling pin 630 in the counterclockwise direction indicated by the arrow R2. Thereby, the first link 610 which is coupled to the first movable body 200 moves the first movable body 200 forwards. When the first movable body 200 moves forwards, the latch 270 also moves forwards along with the first movable body 200, and the tooth 271 of the latch 270 that has engaged with the locking protrusion 420 rotates the rotary member 400 before a subsequent tooth 271 engages with the locking protrusion 420 to prevent the first movable body 200 from undesirably moving rearwards.
As such, in the present invention, both the first movable body 200 and the second movable body 700 move forwards with respect to the stay rods 950 in such a way that the distance that the headrest moves forwards is maximized by increasing the distance between the first movable body 200 and the second movable body 700.
Next, when the button 910 of a button unit 900 is pressed to reduce the volume of the headrest, the button 910 pushes the force transmission member 351 of the wire assembly 350 which is coupled to a first end of the wire 352. Thereby, the wire 352 is pulled. Then, the coupling piece 320 of the traction plate 300 which is coupled to a second end of the wire 352 is moved rearwards so that the rotary member 400 rotates in the counterclockwise direction. When the rotary member 400 rotates in the counterclockwise direction, the engagement between the locking protrusion 420 and the teeth 271 of the latch 270 is released. Then, the front cover 100 is allowed to be pushed rearwards so that the first movable body 200 overlaps the second movable body 700, thus reducing the volume of the headrest.
Meanwhile, to reduce the headrest to a desired volume, during a process of pushing the front cover 100 after the button 910 has been pressed, when the volume of the headrest has reached a desired level, the button 910 is released so that the rotary member 400 is locked to the latch 270 again.
Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (4)

  1. A headrest for a vehicle, comprising:
    a first movable body;
    a second movable body;
    a support body provided between the first movable body and the second movable body, the support body having a support guide bracket;
    a first link hinged at a first end thereof to the first movable body;
    a second link hinged at a first end thereof to the second movable body;
    a center coupling pin rotatably coupling a second end of the first link to a second end of the second link; and
    a guide slot having a predetermined radius of curvature and formed in the support guide bracket, the guide slot providing a path along which the center coupling pin moves.
  2. The headrest according to claim 1, further comprising:
    an insert boss protruding from the first movable body rearwards; and
    a receiving boss protruding from the second movable body forwards and receiving the insert boss therein.
  3. The headrest according to claim 2, further comprising:
    a latch provided under a lower surface of the insert boss; and
    a rotary member coupled to the support body by a rotary shaft, the rotary member having a locking protrusion located ahead of the rotary shaft, the locking protrusion engaging with the latch.
  4. The headrest according to claim 1, wherein the first link and the second link rotate in directions opposite to each other.
PCT/KR2011/005461 2010-07-26 2011-07-25 Headrest for vehicle WO2012015203A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20100071752 2010-07-26
KR10-2010-0071752 2010-07-26

Publications (2)

Publication Number Publication Date
WO2012015203A2 true WO2012015203A2 (en) 2012-02-02
WO2012015203A3 WO2012015203A3 (en) 2012-04-19

Family

ID=45530580

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/005461 WO2012015203A2 (en) 2010-07-26 2011-07-25 Headrest for vehicle

Country Status (2)

Country Link
KR (1) KR101171234B1 (en)
WO (1) WO2012015203A2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717735A (en) * 2012-06-28 2012-10-10 上海延锋江森座椅有限公司 Compensation type movement mechanism
FR3007339A1 (en) * 2013-06-25 2014-12-26 Cera HEADREST FOR THE SEAT OF A MOTOR VEHICLE
FR3007338A1 (en) * 2013-06-25 2014-12-26 Cera HEADREST FOR THE SEAT OF A MOTOR VEHICLE
CN104884301A (en) * 2012-12-28 2015-09-02 提爱思科技股份有限公司 Headrest
EP2939873A4 (en) * 2012-12-28 2016-08-17 Ts Tech Co Ltd Headrest
CN106103185A (en) * 2014-03-17 2016-11-09 现代岱摩斯 electric headrest
JP2017056940A (en) * 2016-12-22 2017-03-23 テイ・エス テック株式会社 Headrest
CN108099723A (en) * 2016-11-24 2018-06-01 格瑞玛股份公司 Headrest, method and head restraint systems for assembling headrest
WO2018108986A1 (en) * 2016-12-14 2018-06-21 Adient Engineering and IP GmbH Head restraint body for a head restraint, and head restraint
DE102020106295A1 (en) 2020-03-09 2021-09-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Headrest module for a motor vehicle seat
US11433793B2 (en) 2017-09-26 2022-09-06 Woobo Tech Co., Ltd. Headrest controlling apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101310624B1 (en) * 2012-09-21 2013-09-24 서천(주) A horizontal moving supporter of headrest
KR101310623B1 (en) * 2012-09-21 2013-09-24 서천(주) A horizontal moving supporter of headrest
KR101298550B1 (en) * 2012-10-24 2013-08-22 우성테크(주) A horizontal moving supporter of headrest
KR101972509B1 (en) 2017-10-11 2019-04-26 주식회사 우보테크 Controlling apparatus of headrest

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005058418A (en) * 2003-08-11 2005-03-10 Nissan Motor Co Ltd Headrest device for vehicle
JP2005152132A (en) * 2003-11-21 2005-06-16 Toyota Motor Corp Headrest apparatus for vehicle
JP2006027593A (en) * 2004-06-16 2006-02-02 Toyota Boshoku Corp Headrest
KR20090131070A (en) * 2008-06-17 2009-12-28 다이모스(주) Active headrest of vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4784480B2 (en) 2006-10-23 2011-10-05 トヨタ紡織株式会社 Vehicle seat
KR100982796B1 (en) 2008-01-30 2010-09-16 정해일 Headrest for cars
KR101044067B1 (en) 2009-09-16 2011-06-23 주식회사 우보테크 Headrest Moving Device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005058418A (en) * 2003-08-11 2005-03-10 Nissan Motor Co Ltd Headrest device for vehicle
JP2005152132A (en) * 2003-11-21 2005-06-16 Toyota Motor Corp Headrest apparatus for vehicle
JP2006027593A (en) * 2004-06-16 2006-02-02 Toyota Boshoku Corp Headrest
KR20090131070A (en) * 2008-06-17 2009-12-28 다이모스(주) Active headrest of vehicle

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717735A (en) * 2012-06-28 2012-10-10 上海延锋江森座椅有限公司 Compensation type movement mechanism
US9815392B2 (en) 2012-12-28 2017-11-14 Ts Tech Co., Ltd. Headrest
US10023089B2 (en) 2012-12-28 2018-07-17 Ts Tech Co., Ltd. Headrest
CN104884301A (en) * 2012-12-28 2015-09-02 提爱思科技股份有限公司 Headrest
EP2939874A4 (en) * 2012-12-28 2016-08-17 Ts Tech Co Ltd Headrest
EP2939873A4 (en) * 2012-12-28 2016-08-17 Ts Tech Co Ltd Headrest
FR3007338A1 (en) * 2013-06-25 2014-12-26 Cera HEADREST FOR THE SEAT OF A MOTOR VEHICLE
FR3007339A1 (en) * 2013-06-25 2014-12-26 Cera HEADREST FOR THE SEAT OF A MOTOR VEHICLE
CN106103185A (en) * 2014-03-17 2016-11-09 现代岱摩斯 electric headrest
CN108099723A (en) * 2016-11-24 2018-06-01 格瑞玛股份公司 Headrest, method and head restraint systems for assembling headrest
WO2018108986A1 (en) * 2016-12-14 2018-06-21 Adient Engineering and IP GmbH Head restraint body for a head restraint, and head restraint
JP2017056940A (en) * 2016-12-22 2017-03-23 テイ・エス テック株式会社 Headrest
US11433793B2 (en) 2017-09-26 2022-09-06 Woobo Tech Co., Ltd. Headrest controlling apparatus
DE102020106295A1 (en) 2020-03-09 2021-09-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Headrest module for a motor vehicle seat
DE102020106295B4 (en) 2020-03-09 2022-08-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Headrest module for a motor vehicle seat
US11738674B2 (en) 2020-03-09 2023-08-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Headrest module for a motor vehicle seat

Also Published As

Publication number Publication date
KR101171234B1 (en) 2012-08-06
KR20120010549A (en) 2012-02-03
WO2012015203A3 (en) 2012-04-19

Similar Documents

Publication Publication Date Title
WO2012015203A2 (en) Headrest for vehicle
EP3733435B1 (en) Locking mechanism, lock assembly, quick-swap support frame assembly and electric vehicle
WO2013133615A1 (en) Reclining apparatus for vehicle seat
WO2010107160A1 (en) Recliner for vehicle seats
WO2015088177A1 (en) Headrest moving device
WO2013133616A1 (en) Reclining apparatus for vehicle seat
WO2010117147A2 (en) Buckle device for length adjustment
WO2021118245A1 (en) Adjustment knob for vehicle air vent
WO2015064936A1 (en) Recliner of vehicle seat
EP1403979B1 (en) A connector assembling construction and assembling method
WO2012138025A1 (en) Adjustable bench to be installed on a fence
WO2020032667A1 (en) Sliding door buffer device
WO2014065526A1 (en) Tool for adjusting horizontal position of vehicle headrest
WO2012124902A2 (en) Connector of electric vehicle charger
WO2013094971A1 (en) Vehicle latch assembly
WO2011162452A1 (en) Lumber support assembly
WO2011065774A2 (en) Bracket for correcting teeth
WO2015178543A1 (en) Work-in and folding device for vehicle seat
WO2016072695A1 (en) Glass interworking device for automotive sunroof
WO2012144672A1 (en) Four-way lumbar support assembly
EP2834694A1 (en) Cable fixation bracket
WO2018070673A1 (en) Headrest moving device
EP4144625A1 (en) Electric bicycle with a battery sleeve
WO2022220473A1 (en) Carrier for motorcycle
WO2012060500A1 (en) Lumbar-support assembly

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11812733

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase in:

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11812733

Country of ref document: EP

Kind code of ref document: A2