WO2019189998A1 - Apparatus for adjusting headrest wing - Google Patents

Apparatus for adjusting headrest wing Download PDF

Info

Publication number
WO2019189998A1
WO2019189998A1 PCT/KR2018/007087 KR2018007087W WO2019189998A1 WO 2019189998 A1 WO2019189998 A1 WO 2019189998A1 KR 2018007087 W KR2018007087 W KR 2018007087W WO 2019189998 A1 WO2019189998 A1 WO 2019189998A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating rod
leaf spring
headrest
fixing part
headrest wing
Prior art date
Application number
PCT/KR2018/007087
Other languages
French (fr)
Inventor
Hae Il Jeong
Gi Su Oh
Original Assignee
Woobo Tech Co., Ltd.
Deok Yang Precision 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., Deok Yang Precision Co., Ltd. filed Critical Woobo Tech Co., Ltd.
Publication of WO2019189998A1 publication Critical patent/WO2019189998A1/en

Links

Images

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
    • B60N2/885—Head-rests provided with side-rests
    • 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
    • B60N2/888—Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/07—Facilitating assembling or mounting

Definitions

  • the present invention relates to an apparatus for adjusting an angle of a headrest wing.
  • a vehicle headrest is installed at an upper end of a backrest of a seat so that the vehicle headrest serves as a cushion that comfortably supports the head of an occupant at ordinary times and supports the head to prevent the head from suddenly falling back so as to prevent a neck injury or the like when an accident occurs.
  • a headrest wing indicates each of left and right parts of a headrest and provides a cushion to the left and right of the headrest so that the head of an occupant is supported in a stable manner.
  • the conventional headrests include a headrest in which an angle of a headrest wing is adjustable according to the convenience of an occupant.
  • a hinge which is formed by alternately overlapping a plurality of polymerized plates provided in the form of brackets is used for tilting of an armchair. Angles of a left part and a right part of a headrest are adjusted using friction between the plurality of polymerized plates.
  • Japanese Laid-open Patent Publication No. 2004-097452 has a problem in that it is difficult to manage components due to a large number of components because a method of adjusting an operational force of a headrest wing by overlapping the polymerized plates is used.
  • an elastic force of a torsion spring is used to adjust an angle of a wing plate.
  • an angle of the wing plate is fixed using a ratchet gear that is rotated along the wing plate and a stopper engaged with the ratchet gear, and when the wing plate is rotated forward to an end within a driving range, the wing plate returns to a state parallel to a center plate due to the elastic force of the torsion spring.
  • Korean Laid-open Patent Publication No. 10-2011-0002542 has a problem in that it is difficult to manage the components due to a large number of required components because the ratchet gear and the stopper are required.
  • Patent Document 1 Japanese Laid-open Patent Publication No. 2004-097452
  • Patent Document 2 Korean Laid-open Patent Publication No. 10-2011-0002542
  • a technical objective of the present invention is to provide an apparatus for adjusting a headrest wing, of which the assembling structure is simplified.
  • An apparatus for adjusting a headrest wing includes: a rotating rod having both ends connected to one of a headrest wing and a headrest body, and a leaf spring wound around the rotating rod, wherein at least one contact part is formed between the rotating rod and the leaf spring after being assembled, a distance, in the leaf spring, from a central axis of the leaf spring to the contact part is smaller than a distance, in the rotating rod, from a rotating shaft of the rotating rod to the contact part before being assembled, and the leaf spring includes a winding part wound around the rotating rod and having one end formed as a free end, and a fixing part having one end connected to the winding part and the other end connected to the other one of the headrest wing and the headrest body.
  • the fixing part may further include a hole through which a resin is introduced.
  • the fixing part may further include a curved groove formed to elongate from the fixing part toward the winding part, and the curved groove may be formed convex at one surface of the fixing part and may be formed concave at the other surface of the fixing part corresponding to the one surface of the fixing part.
  • one side of the fixing part may have a form in which a rounded edge is formed in a staircase.
  • the winding part may further include a vertical part formed at one end thereof to escape outward from a circumferential direction of the winding part, and the vertical part and the fixing part may be separated from each other so that an inner surface of the vertical part and an inner surface of the fixing part are not in contact with each other when a load is applied in a direction in which the leaf spring is wound around the rotating rod.
  • An apparatus for adjusting a headrest wing according to the present invention has the following advantageous effects.
  • a distance from a central axis of the leaf spring to the contact part is smaller than a distance from the rotating shaft of the rotating rod to the contact part, and thus a frictional force can be obtained by a simple method.
  • a sufficient driving force can be obtained only with a frictional force between one leaf spring and the rotating rod, and thus manufacturing can be easily performed due to a simple structure and a smaller number of types of components to be managed.
  • a curved groove is formed in the leaf spring so that strength of the leaf spring increases, and thus the leaf spring can be prevented from being bent.
  • FIG. 1 is a front view of a headrest according to a first exemplary embodiment of the present invention.
  • FIG. 2 is a perspective view of a front portion of the headrest according to the first exemplary embodiment of the present invention.
  • FIG. 3 is an exploded perspective view of a rear surface of an apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
  • FIG. 4 is a first side perspective view of a leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
  • FIG. 5 is a second side perspective view of the leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
  • FIG. 6 is a front view illustrating a rotating rod and the leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
  • FIG. 8 is a front view illustrating a leaf spring and a rotating rod of an apparatus for adjusting a headrest wing according to a second exemplary embodiment of the present invention.
  • FIG. 9 is a front view illustrating a leaf spring and a rotating rod of an apparatus for adjusting a headrest wing according to a third exemplary embodiment of the present invention.
  • front-rear refers to a front-rear direction (longitudinal direction) of a vehicle
  • top-bottom refers to a vertical direction of the vehicle
  • left-right refers to a left-right direction (width direction) of the vehicle.
  • a headrest wing 200 may be formed at the left and right of a headrest body 100 as illustrated in FIG. 1, and may also be formed on an upper portion of the headrest body 100.
  • the case in which the headrest wing 200 is formed at the left and right of the headrest body 100 will be described.
  • an apparatus for adjusting a headrest wing of a first exemplary embodiment of the present invention includes a hinge part 300 configured to connect the headrest body 100 and the headrest wing 200.
  • the hinge part 300 includes a rotating rod 310 and a leaf spring 320.
  • the rotating rod 310 includes protruding parts 311 and a shaft 312.
  • the protruding parts 311 are formed on both ends of the shaft 312 and are connected with the headrest wing 200.
  • a plurality of protrusions are formed on circumferential surfaces of the protruding parts 311 and protrude long in a vertical direction to prevent a slip between the protruding part 311 and the headrest wing 200.
  • the headrest wing 200 may maintain a predetermined angle by the protruding part 311.
  • One side of the leaf spring 320 wound around the shaft 312 of the rotating rod 310 is connected to the headrest body 100.
  • the protruding part 311 of the rotating rod 310 may be connected to the headrest body 100, and one side of the leaf spring 320 wound around the shaft 312 of the rotating rod 310 may be connected to the headrest wing 200.
  • the headrest body 100, the headrest wing 200, and the hinge part 300 may be simply assembled using insert-injection-molding.
  • the leaf spring 320 will be illustrated in more detail in FIGS. 4 to 7.
  • the leaf spring 320 includes a winding part 321 wound around the shaft 312 of the rotating rod 310 and having one end formed as a free end, a fixing part 322 connected to the other end of the winding part 321, a hole 323 formed in the winding part 321, and a curved groove 324.
  • the winding part 321 is formed in a partially cut cylindrical shape formed of a rolled plate.
  • An inner diameter of the winding part 321 is formed to be smaller than an outer diameter of the shaft 312 of the rotating rod 310 so that the rotating rod 310 and the leaf spring 320 are in close contact with each other after being assembled. Thus, a frictional force between the rotating rod 310 and the leaf spring 320 can be effectively obtained.
  • the winding part 321 may be formed in a different shape.
  • a distance from a central axis of the winding part 321 to a contact part at which the rotating rod 310 and the winding part 321 are in contact with is formed to be smaller than a distance from a rotating shaft of the rotating rod 310 to the contact part.
  • the winding part 321 includes a plurality of long holes 326 formed around the winding part 321 and a plurality of bands 327 formed by the long holes 326.
  • the long holes 326 are formed along a circumferential surface of the leaf spring 320.
  • the bands 327 are formed by the long holes 326 along a circumferential surface of the leaf spring 320.
  • the long holes 326 may be formed to be inclined along the circumferential surface of the leaf spring 320.
  • the bands 327 are also formed to be inclined along a circumferential surface of the leaf spring 320, and a frictional force is generated at the contact part between the leaf spring 320 and the rotating rod 310 not only in the circumferential direction of the leaf spring 320 but also in an axial direction of the leaf spring 320 due to the bands 327.
  • the winding part 321 may further include a vertical part 325.
  • the vertical part 325 is connected to one end of the winding part 321 to escape toward the outside of a circumferential direction of the winding part 321.
  • a width of the winding part 321 is equal or similar to that of the vertical part 325.
  • a portion at which the vertical part 325 and the winding part 321 are connected with each other is formed in a gently curved shape.
  • the vertical part 325 When a load is applied in the direction in which the leaf spring 320 is wound around the rotating rod 310, the vertical part 325 is separated from the fixing part 322 so that an inner surface of the vertical part 325 and an inner surface of the fixing part 322 are not in contact with each other. To this end, the vertical part 325 is formed in a direction parallel to the fixing part 322 or is inclined in the side opposite the fixing part 322.
  • One end of the fixing part 322 is connected to the other end of the winding part 321.
  • a curved part 328 formed in a staircase shape with a rounded edge is formed at one side of the fixing part 322.
  • the curved part 328 is connected in a tangential direction of the circumferential direction of the winding part 321.
  • the curved part 328 is formed in a staircase shape with a rounded edge.
  • the curved part 328 extends longer than a radius of the winding part 321 from a connection portion with the winding part 321 and is bent inward. Therefore, the curved part 328 is not in contact with the rotating rod 310 except the connection portion with the winding part 321, and the bent edge is formed in a rounded shape.
  • the curved part 328 extends from the bent portion by a length similar to the radius of the winding part 321 and is bent outward. In this case, the bent edge is formed in a rounded shape.
  • the curved part 328 has more strength than in a straight shape due to the shape of the curved part 328. Thus, when the leaf spring 320 is operated, the curved part 328 prevents the leaf spring 320 from being bent. Since the curved part 328 is not deformed, the winding part 321 is not deformed due to the fixing part 322, and thus a contact between the winding part 321 and the rotating rod 310 is not affected by deformation.
  • the fixing part 322 may further include the hole 323 and the curved groove 324.
  • the hole 323 is formed in a central portion of the other side of the fixing part 322.
  • An inner diameter of the hole 323 is formed large enough for a resin to be introduced when the headrest body 100, the headrest wing 200, and the hinge part 300 are insert-injection-molded.
  • the leaf spring 320 is fixed to the headrest body 100 and is not separated from the headrest body 100.
  • the curved groove 324 is formed long in a direction from the fixing part 322 to the winding part 321.
  • the curved groove 324 is formed convex at one surface of the fixing part 322, and is formed concave at the other surface of the fixing part 322.
  • the curved groove 324 allows strength and shear stress of the fixing part 322 to increase, and thus prevents the leaf spring 320 from being bent.
  • the curved groove 324 is preferably formed convex toward an outer surface of the fixing part 322 to avoid an interference with the vertical part 325 and the rotating rod 310.
  • the curved groove 324 is formed to be connected even to the curved part 328, and thus the strength of the fixing part 322 can be more increased.
  • the headrest body 100, the headrest wing 200, and the hinge part 300 are insert-injection-molded, a resin is introduced into a concave portion of the curved groove 324 inserted into the headrest body 100 to function as a locking protrusion, and thus the leaf spring 320 is not easily separated from the headrest body 100.
  • the hole 323 may be formed at a position overlapping the curved groove 324. Such a coupling structure facilitates fixing.
  • the rotating rod 310 rotates in the clockwise direction by a frictional force between the headrest wing 200 and the protruding part 311 of the rotating rod 310.
  • the rotating rod 310 rotates in the counterclockwise direction by a frictional force between the headrest wing 200 and the protruding part 311 of the rotating rod 310.
  • an apparatus for adjusting a headrest wing of a second exemplary embodiment of the present invention has a form in which a plurality of leaf springs 320 are assembled to a rotating rod 310 in the same direction (a clockwise direction or a counterclockwise direction).
  • a frictional force can be obtained more when the plurality of leaf springs 320 are used than when one leaf spring 320 is used.
  • a operational force increases when the headrest wing 200 rotates in a predetermined direction according to a direction in which the leaf spring 320 is wound, and the operational force decreases when the headrest wing 200 rotates in the opposite direction.
  • an apparatus for adjusting a headrest wing in a third exemplary embodiment of the present invention has a form in which a plurality of leaf springs 320 are assembled to a rotating rod 310 in opposite directions.
  • a frictional force can be obtained more when the plurality of leaf springs 320 are used than when one leaf spring 320 is used.
  • an operational force when the headrest wing 200 is pushed may be the same as an operation force when the headrest wing 200 is pulled.
  • 311 PROTRUDING PART
  • 312 SHAFT

Abstract

The present invention relates to an apparatus for adjusting a headrest wing, and more particularly, to an apparatus for adjusting a headrest wing which has fewer assembling processes by reducing the number of components and allows components to be easily managed.

Description

APPARATUS FOR ADJUSTING HEADREST WING
The present invention relates to an apparatus for adjusting an angle of a headrest wing.
Generally, a vehicle headrest is installed at an upper end of a backrest of a seat so that the vehicle headrest serves as a cushion that comfortably supports the head of an occupant at ordinary times and supports the head to prevent the head from suddenly falling back so as to prevent a neck injury or the like when an accident occurs.
Generally, a headrest wing indicates each of left and right parts of a headrest and provides a cushion to the left and right of the headrest so that the head of an occupant is supported in a stable manner.
The conventional headrests include a headrest in which an angle of a headrest wing is adjustable according to the convenience of an occupant.
However, there is a problem in that it is difficult to manage components due to a complicated structure of an apparatus for adjusting a headrest wing.
In Japanese Laid-open Patent Publication No. 2004-097452, a hinge which is formed by alternately overlapping a plurality of polymerized plates provided in the form of brackets is used for tilting of an armchair. Angles of a left part and a right part of a headrest are adjusted using friction between the plurality of polymerized plates.
The embodiment of Japanese Laid-open Patent Publication No. 2004-097452 has a problem in that it is difficult to manage components due to a large number of components because a method of adjusting an operational force of a headrest wing by overlapping the polymerized plates is used.
In Korean Laid-open Patent Publication No. 10-2011-0002542, an elastic force of a torsion spring is used to adjust an angle of a wing plate. When the wing plate is rotated forward, an angle of the wing plate is fixed using a ratchet gear that is rotated along the wing plate and a stopper engaged with the ratchet gear, and when the wing plate is rotated forward to an end within a driving range, the wing plate returns to a state parallel to a center plate due to the elastic force of the torsion spring.
The embodiment of Korean Laid-open Patent Publication No. 10-2011-0002542 has a problem in that it is difficult to manage the components due to a large number of required components because the ratchet gear and the stopper are required.
Further, when it is desired to re-adjust an angle of a headrest wing, the angle has to be re-adjusted from the beginning.
[Prior Art Documents]
[Patent Documents]
(Patent Document 1) Japanese Laid-open Patent Publication No. 2004-097452
(Patent Document 2) Korean Laid-open Patent Publication No. 10-2011-0002542
A technical objective of the present invention is to provide an apparatus for adjusting a headrest wing, of which the assembling structure is simplified.
An apparatus for adjusting a headrest wing according to the present invention includes: a rotating rod having both ends connected to one of a headrest wing and a headrest body, and a leaf spring wound around the rotating rod, wherein at least one contact part is formed between the rotating rod and the leaf spring after being assembled, a distance, in the leaf spring, from a central axis of the leaf spring to the contact part is smaller than a distance, in the rotating rod, from a rotating shaft of the rotating rod to the contact part before being assembled, and the leaf spring includes a winding part wound around the rotating rod and having one end formed as a free end, and a fixing part having one end connected to the winding part and the other end connected to the other one of the headrest wing and the headrest body.
In the apparatus for adjusting a headrest wing according to the present invention, it is characterized that the fixing part may further include a hole through which a resin is introduced.
In the apparatus for adjusting a headrest wing according to the present invention, it is characterized that the fixing part may further include a curved groove formed to elongate from the fixing part toward the winding part, and the curved groove may be formed convex at one surface of the fixing part and may be formed concave at the other surface of the fixing part corresponding to the one surface of the fixing part.
In the apparatus for adjusting a headrest wing according to the present invention, it is characterized that one side of the fixing part may have a form in which a rounded edge is formed in a staircase.
In the apparatus for adjusting a headrest wing according to the present invention, it is characterized that the winding part may further include a vertical part formed at one end thereof to escape outward from a circumferential direction of the winding part, and the vertical part and the fixing part may be separated from each other so that an inner surface of the vertical part and an inner surface of the fixing part are not in contact with each other when a load is applied in a direction in which the leaf spring is wound around the rotating rod.
An apparatus for adjusting a headrest wing according to the present invention has the following advantageous effects.
A distance from a central axis of the leaf spring to the contact part is smaller than a distance from the rotating shaft of the rotating rod to the contact part, and thus a frictional force can be obtained by a simple method.
A sufficient driving force can be obtained only with a frictional force between one leaf spring and the rotating rod, and thus manufacturing can be easily performed due to a simple structure and a smaller number of types of components to be managed.
When the headrest is insert-injection-molded, a hole through which a resin is introduced is formed in the leaf spring, and thus one end of the leaf spring can be fixed to the headrest without a separate device.
A curved groove is formed in the leaf spring so that strength of the leaf spring increases, and thus the leaf spring can be prevented from being bent.
FIG. 1 is a front view of a headrest according to a first exemplary embodiment of the present invention.
FIG. 2 is a perspective view of a front portion of the headrest according to the first exemplary embodiment of the present invention.
FIG. 3 is an exploded perspective view of a rear surface of an apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
FIG. 4 is a first side perspective view of a leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
FIG. 5 is a second side perspective view of the leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
FIG. 6 is a front view illustrating a rotating rod and the leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
FIG. 7 is a cross-sectional view of the leaf spring of the apparatus for adjusting a headrest wing according to the first exemplary embodiment of the present invention.
FIG. 8 is a front view illustrating a leaf spring and a rotating rod of an apparatus for adjusting a headrest wing according to a second exemplary embodiment of the present invention.
FIG. 9 is a front view illustrating a leaf spring and a rotating rod of an apparatus for adjusting a headrest wing according to a third exemplary embodiment of the present invention.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
For reference, for elements which are the same as those in the related art from among elements of the present invention which will be described below, the above-described related art will be referred to, and detailed description thereof will be omitted.
Technical terms used herein are merely for describing specific embodiments and are not intended to limit the present invention. A singular term used herein includes a plurality term unless clearly indicated otherwise in the context.
The term "include" used herein embodies a specific feature, region, integer, step, operation, element, and/or component, and does not preclude the existence or addition of another specific feature, region, integer, step, operation, element, component, and/or group.
The terms that indicate a relative space such as "below" and "above" may be used to more easily describe the relationship between one portion and another portion illustrated in the drawings. Such terms are intended to include another meaning or operation of an apparatus in use as well as a meaning intended in the drawings. For example, when an apparatus in the drawings is flipped, certain portions described as being placed "below" other portions may be placed "above" other portions. Consequently, the illustrative term "below" includes both upward and downward directions. An apparatus may be rotated 90° or at another angle, and the terms indicating a relative space should be interpreted accordingly.
In exemplary embodiments of the present invention, front-rear refers to a front-rear direction (longitudinal direction) of a vehicle, top-bottom refers to a vertical direction of the vehicle, and left-right refers to a left-right direction (width direction) of the vehicle.
A headrest wing 200 may be formed at the left and right of a headrest body 100 as illustrated in FIG. 1, and may also be formed on an upper portion of the headrest body 100.
In the exemplary embodiments of the present invention, the case in which the headrest wing 200 is formed at the left and right of the headrest body 100 will be described.
<First embodiment>
As illustrated in FIG. 1, an apparatus for adjusting a headrest wing of a first exemplary embodiment of the present invention includes a hinge part 300 configured to connect the headrest body 100 and the headrest wing 200.
As illustrated in FIGS. 2 and 3, the hinge part 300 includes a rotating rod 310 and a leaf spring 320.
The rotating rod 310 includes protruding parts 311 and a shaft 312.
The protruding parts 311 are formed on both ends of the shaft 312 and are connected with the headrest wing 200.
A plurality of protrusions are formed on circumferential surfaces of the protruding parts 311 and protrude long in a vertical direction to prevent a slip between the protruding part 311 and the headrest wing 200.
The headrest wing 200 may maintain a predetermined angle by the protruding part 311.
One side of the leaf spring 320 wound around the shaft 312 of the rotating rod 310 is connected to the headrest body 100.
Unlike the above description, the protruding part 311 of the rotating rod 310 may be connected to the headrest body 100, and one side of the leaf spring 320 wound around the shaft 312 of the rotating rod 310 may be connected to the headrest wing 200.
The headrest body 100, the headrest wing 200, and the hinge part 300 may be simply assembled using insert-injection-molding.
The leaf spring 320 will be illustrated in more detail in FIGS. 4 to 7.
The leaf spring 320 includes a winding part 321 wound around the shaft 312 of the rotating rod 310 and having one end formed as a free end, a fixing part 322 connected to the other end of the winding part 321, a hole 323 formed in the winding part 321, and a curved groove 324.
The winding part 321 is formed in a partially cut cylindrical shape formed of a rolled plate.
An inner diameter of the winding part 321 is formed to be smaller than an outer diameter of the shaft 312 of the rotating rod 310 so that the rotating rod 310 and the leaf spring 320 are in close contact with each other after being assembled. Thus, a frictional force between the rotating rod 310 and the leaf spring 320 can be effectively obtained.
Unlike the above description, the winding part 321 may be formed in a different shape. In this case, a distance from a central axis of the winding part 321 to a contact part at which the rotating rod 310 and the winding part 321 are in contact with is formed to be smaller than a distance from a rotating shaft of the rotating rod 310 to the contact part.
The winding part 321 includes a plurality of long holes 326 formed around the winding part 321 and a plurality of bands 327 formed by the long holes 326.
The long holes 326 are formed along a circumferential surface of the leaf spring 320.
The bands 327 are formed by the long holes 326 along a circumferential surface of the leaf spring 320.
Due to the bands 327, a frictional force is generated at the contact part between the leaf spring 320 and the rotating rod 310 in a circumferential direction of the leaf spring 320.
Unlike the above description, the long holes 326 may be formed to be inclined along the circumferential surface of the leaf spring 320. Then, the bands 327 are also formed to be inclined along a circumferential surface of the leaf spring 320, and a frictional force is generated at the contact part between the leaf spring 320 and the rotating rod 310 not only in the circumferential direction of the leaf spring 320 but also in an axial direction of the leaf spring 320 due to the bands 327.
The winding part 321 may further include a vertical part 325.
The vertical part 325 is connected to one end of the winding part 321 to escape toward the outside of a circumferential direction of the winding part 321.
A width of the winding part 321 is equal or similar to that of the vertical part 325.
A portion at which the vertical part 325 and the winding part 321 are connected with each other is formed in a gently curved shape. Thus, when a load is applied in a direction in which the leaf spring 320 is wound around the rotating rod 310, a free end part of the vertical part 325 may be prevented from penetrating the rotating rod 310.
When a load is applied in the direction in which the leaf spring 320 is wound around the rotating rod 310, the vertical part 325 is separated from the fixing part 322 so that an inner surface of the vertical part 325 and an inner surface of the fixing part 322 are not in contact with each other. To this end, the vertical part 325 is formed in a direction parallel to the fixing part 322 or is inclined in the side opposite the fixing part 322.
One end of the fixing part 322 is connected to the other end of the winding part 321.
A curved part 328 formed in a staircase shape with a rounded edge is formed at one side of the fixing part 322.
The curved part 328 is connected in a tangential direction of the circumferential direction of the winding part 321.
The curved part 328 is formed in a staircase shape with a rounded edge. The curved part 328 extends longer than a radius of the winding part 321 from a connection portion with the winding part 321 and is bent inward. Therefore, the curved part 328 is not in contact with the rotating rod 310 except the connection portion with the winding part 321, and the bent edge is formed in a rounded shape. The curved part 328 extends from the bent portion by a length similar to the radius of the winding part 321 and is bent outward. In this case, the bent edge is formed in a rounded shape.
The curved part 328 has more strength than in a straight shape due to the shape of the curved part 328. Thus, when the leaf spring 320 is operated, the curved part 328 prevents the leaf spring 320 from being bent. Since the curved part 328 is not deformed, the winding part 321 is not deformed due to the fixing part 322, and thus a contact between the winding part 321 and the rotating rod 310 is not affected by deformation.
The fixing part 322 may further include the hole 323 and the curved groove 324.
The hole 323 is formed in a central portion of the other side of the fixing part 322.
An inner diameter of the hole 323 is formed large enough for a resin to be introduced when the headrest body 100, the headrest wing 200, and the hinge part 300 are insert-injection-molded. When the resin is introduced and cured, the leaf spring 320 is fixed to the headrest body 100 and is not separated from the headrest body 100.
The curved groove 324 is formed long in a direction from the fixing part 322 to the winding part 321.
The curved groove 324 is formed convex at one surface of the fixing part 322, and is formed concave at the other surface of the fixing part 322. The curved groove 324 allows strength and shear stress of the fixing part 322 to increase, and thus prevents the leaf spring 320 from being bent.
The curved groove 324 is preferably formed convex toward an outer surface of the fixing part 322 to avoid an interference with the vertical part 325 and the rotating rod 310.
The curved groove 324 is formed to be connected even to the curved part 328, and thus the strength of the fixing part 322 can be more increased.
Further, when the headrest body 100, the headrest wing 200, and the hinge part 300 are insert-injection-molded, a resin is introduced into a concave portion of the curved groove 324 inserted into the headrest body 100 to function as a locking protrusion, and thus the leaf spring 320 is not easily separated from the headrest body 100.
The hole 323 may be formed at a position overlapping the curved groove 324. Such a coupling structure facilitates fixing.
Hereinafter, an operational force of the headrest wing 200 according to a direction of a load applied to the apparatus for adjusting a headrest wing will be described.
As illustrated in FIG. 4, an example of the leaf spring 320 rolled clockwise in a circumferential direction of the rotating rod 310 from the fixing part 322 toward the vertical part 325 will be described.
When the headrest wing 200 rotates about the rotating rod 310 in a clockwise direction, the rotating rod 310 rotates in the clockwise direction by a frictional force between the headrest wing 200 and the protruding part 311 of the rotating rod 310.
When the rotating rod 310 rotates in the clockwise direction, force is applied in the clockwise direction which is a direction in which the winding part 321 is wound by a frictional force between the shaft 312 of the rotating rod 310 and the winding part 321 of the leaf spring 320, and the vertical part 325 moves clockwise in the circumferential direction of the rotating rod 310.
When the vertical part 325 is moved clockwise in the circumferential direction of the rotating rod 310, a force in which the winding part 321 tightens the shaft 312 increases, and thus an operational force of the headrest wing 200 increases.
In contrast, when the headrest wing 200 rotates about the rotating rod 310 in a counterclockwise direction, the rotating rod 310 rotates in the counterclockwise direction by a frictional force between the headrest wing 200 and the protruding part 311 of the rotating rod 310.
When the rotating rod 310 rotates in the counterclockwise direction, a force is applied in the counterclockwise direction which is a direction in which the winding part 321 is unwound by the frictional force between the shaft 312 of the rotating rod 210 and the winding part 321 of the leaf spring 320, and thus the vertical part 325 is moved counterclockwise in the circumferential direction of the rotating rod 310.
When the vertical part 325 is moved counterclockwise in the circumferential direction of the rotating rod 310, the force in which the winding part 321 tightens the shaft 312 decreases, and thus an operational force of the headrest wing 200 decreases.
Unlike the above description, when the leaf spring 320 wound counterclockwise is used, an operational force decreases when the headrest wing 200 rotates clockwise, and an operational force increases when the headrest wing 200 rotates counterclockwise.
<Second embodiment>
As illustrated in FIG. 8, an apparatus for adjusting a headrest wing of a second exemplary embodiment of the present invention has a form in which a plurality of leaf springs 320 are assembled to a rotating rod 310 in the same direction (a clockwise direction or a counterclockwise direction).
Detailed descriptions of elements which are the same as those in the above-described first embodiment will be omitted.
A frictional force can be obtained more when the plurality of leaf springs 320 are used than when one leaf spring 320 is used.
Further, when the plurality of leaf springs 320 are assembled in the same direction, like when one leaf spring 320 is used, a operational force increases when the headrest wing 200 rotates in a predetermined direction according to a direction in which the leaf spring 320 is wound, and the operational force decreases when the headrest wing 200 rotates in the opposite direction.
<Third embodiment>
As illustrated in FIG. 9, an apparatus for adjusting a headrest wing in a third exemplary embodiment of the present invention has a form in which a plurality of leaf springs 320 are assembled to a rotating rod 310 in opposite directions.
Detailed descriptions of elements which are the same as those in the above-described first embodiment will be omitted.
A frictional force can be obtained more when the plurality of leaf springs 320 are used than when one leaf spring 320 is used.
Further, when the plurality of leaf springs 320 are assembled in the opposite directions, an operational force when the headrest wing 200 is pushed may be the same as an operation force when the headrest wing 200 is pulled.
Although the present invention has been described above with reference to the exemplary embodiments thereof, those of ordinary skill in the art should be able to modify or change the present invention in various ways within the scope not departing from the spirit and the range of the present invention indicated by the appended claims.
[Description of Symbols]
100: HEADREST BODY, 200: HEADREST WING
300: HINGE PART, 310: ROTATING ROD
311: PROTRUDING PART, 312: SHAFT
320: LEAF SPRING, 321: WINDING PART
322: FIXING PART, 323: HOLE
324: CURVED GROOVE, 325: VERTICAL PART
326: LONG HOLE, 327: BAND
328: CURVED PART

Claims (5)

  1. An apparatus for adjusting a headrest wing, comprising:
    a rotating rod having both ends connected to one of a headrest wing and a headrest body; and
    a leaf spring wound around the rotating rod,
    wherein at least one contact part is formed between the rotating rod and the leaf spring after being assembled,
    a distance, in the leaf spring, from a central axis of the leaf spring to the contact part is smaller than a distance, in the rotating rod, from a rotating shaft of the rotating rod to the contact part before being assembled, and
    the leaf spring includes a winding part wound around the rotating rod and having one end formed as a free end, and a fixing part having one end connected to the winding part and the other end connected to the other one of the headrest wing and the headrest body.
  2. The apparatus for adjusting a headrest wing according to claim 1, wherein the fixing part further includes a hole through which a resin is introduced.
  3. The apparatus for adjusting a headrest wing according to claim 1, wherein the fixing part further includes a curved groove formed to elongate from the fixing part toward the winding part,
    wherein the curved groove is formed convex at one surface of the fixing part and is formed concave at the other surface of the fixing part corresponding to the one surface of the fixing part.
  4. The apparatus for adjusting a headrest wing according to claim 1 or 3, wherein one side of the fixing part has a form in which a rounded edge is formed in a staircase.
  5. The apparatus for adjusting a headrest wing according to claim 1, wherein the winding part further includes a vertical part formed at one end thereof to escape outward from a circumferential direction of the winding part,
    wherein the vertical part and the fixing part are separated from each other so that an inner surface of the vertical part and an inner surface of the fixing part are not in contact with each other when a load is applied in a direction in which the leaf spring is wound around the rotating rod.
PCT/KR2018/007087 2018-03-27 2018-06-22 Apparatus for adjusting headrest wing WO2019189998A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180035052A KR102031261B1 (en) 2018-03-27 2018-03-27 Controlling apparatus of headrest wing
KR10-2018-0035052 2018-03-27

Publications (1)

Publication Number Publication Date
WO2019189998A1 true WO2019189998A1 (en) 2019-10-03

Family

ID=68059099

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/007087 WO2019189998A1 (en) 2018-03-27 2018-06-22 Apparatus for adjusting headrest wing

Country Status (2)

Country Link
KR (1) KR102031261B1 (en)
WO (1) WO2019189998A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102500040B1 (en) 2021-03-11 2023-02-15 (주)다우테크놀로지 Hinge for side wing of headrest

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980035893A (en) * 1996-11-15 1998-08-05 김영귀 Head Rest Support Structure
KR100598597B1 (en) * 2005-07-28 2006-07-13 코리아에프티 주식회사 Headrest for an automobile
JP2008272270A (en) * 2007-04-28 2008-11-13 Bizen Hatsujo Kk Headrest for vehicles
KR20090012890U (en) * 2008-06-13 2009-12-17 주식회사 우보테크 Headrest adjusting device
KR20110002542A (en) * 2009-07-02 2011-01-10 타타대우상용차 주식회사 Headrest

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004097452A (en) 2002-09-09 2004-04-02 Takano Co Ltd Easy chair with body support mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980035893A (en) * 1996-11-15 1998-08-05 김영귀 Head Rest Support Structure
KR100598597B1 (en) * 2005-07-28 2006-07-13 코리아에프티 주식회사 Headrest for an automobile
JP2008272270A (en) * 2007-04-28 2008-11-13 Bizen Hatsujo Kk Headrest for vehicles
KR20090012890U (en) * 2008-06-13 2009-12-17 주식회사 우보테크 Headrest adjusting device
KR20110002542A (en) * 2009-07-02 2011-01-10 타타대우상용차 주식회사 Headrest

Also Published As

Publication number Publication date
KR20190112986A (en) 2019-10-08
KR102031261B1 (en) 2019-10-11

Similar Documents

Publication Publication Date Title
WO2019151622A1 (en) Resonator wheel
WO2014084600A1 (en) Device for assembling rear seat back assembly
WO2010107160A1 (en) Recliner for vehicle seats
WO2019189998A1 (en) Apparatus for adjusting headrest wing
WO2014084652A1 (en) Pumping device for car seat
WO2012015203A2 (en) Headrest for vehicle
WO2014084653A1 (en) Pumping device for car seat
WO2017052028A1 (en) Seat recliner for vehicle
CN1522095B (en) Plug connecting mechanism
WO2015064936A1 (en) Recliner of vehicle seat
US20090243964A1 (en) Display apparatus
WO2018093023A1 (en) Cordless blind apparatus
WO2015102319A1 (en) Vibration-reducing headrest guide
WO2014209047A1 (en) Recliner of vehicle seat
WO2019189999A1 (en) Apparatus for adjusting headrest wing
WO2017215394A1 (en) Rotational force transmitting assembly, photosensitive drum and process cartridge
WO2018124441A1 (en) Electric power steering system
WO2011149201A2 (en) Retractor for seat belt
WO2019147033A1 (en) Collapsible steering column assembly
WO2011162452A1 (en) Lumber support assembly
WO2023234686A1 (en) Rear opening/closing door hinge device for freight vehicle loading compartment
WO2022191383A1 (en) Seat belt buckle device
US7686243B2 (en) Self-locking seat belt retractor
WO2016108514A1 (en) Seat recliner
WO2019022445A1 (en) Headrest tilting device

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: 18912974

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18912974

Country of ref document: EP

Kind code of ref document: A1