WO2020179965A1 - Appui-tête - Google Patents

Appui-tête Download PDF

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Publication number
WO2020179965A1
WO2020179965A1 PCT/KR2019/004735 KR2019004735W WO2020179965A1 WO 2020179965 A1 WO2020179965 A1 WO 2020179965A1 KR 2019004735 W KR2019004735 W KR 2019004735W WO 2020179965 A1 WO2020179965 A1 WO 2020179965A1
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WO
WIPO (PCT)
Prior art keywords
cover
lock
guide
groove
plate
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2019/004735
Other languages
English (en)
Inventor
Hae Il Jeong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Woobo Tech Co Ltd
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 WO2020179965A1 publication Critical patent/WO2020179965A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • B60N2/809—Head-rests movable or adjustable vertically slidable
    • B60N2/812—Head-rests movable or adjustable vertically slidable characterised by their locking devices
    • B60N2/815—Release mechanisms, e.g. buttons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • B60N2/809—Head-rests movable or adjustable vertically slidable
    • B60N2/812—Head-rests movable or adjustable vertically slidable characterised by their locking devices
    • B60N2/818—Head-rests movable or adjustable vertically slidable characterised by their locking devices with stepwise positioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • B60N2/865—Head-rests movable or adjustable providing a fore-and-aft movement with respect to the occupant's head
    • 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
    • B60N2/894—Head-rests with rods solidly attached to the back-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
    • B60Y2304/07—Facilitating assembling or mounting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise

Definitions

  • the present invention relates to a headrest capable of reducing the number of necessary components and reducing a thickness of the headrest.
  • a headrest for a vehicle is installed on a top end of a backrest of a seat to support the head of a passenger in comfort. To this end, it is necessary to adjust a position of a headrest to suit a passenger.
  • Korean Patent Registration No. 10-1383094 discloses a conventional technique capable of adjusting a position of a headrest upward and downward or back and forth using one button.
  • a vertical position of a headrest is adjusted using a lock plate, which is moved laterally by a button and coupled with a stay rod, and a back-and-forth position of the headrest is adjusted using a lock pin plate which is moved laterally by the lock plate and coupled with a locking cover disposed on a cover in a back-and-forth direction.
  • Korean Patent Registration No. 10-1383094 has the following problems.
  • the cover includes a front cover, a rear cover coupled with the front cover, and an under cover in which a button is installed and which is coupled with the front cover and the rear cover, a length in a back-and-forth direction of the headrest increases due to the under cover and the number of components increases such that the assembling process becomes complicated.
  • Patent Document 1 Korean Patent Registration No. 10-1383094
  • the present invention is directed to providing a headrest capable of reducing the number of necessary components to reduce manufacturing costs, to simplify an assembling structure, and to minimize a longitudinal length of a vehicle.
  • One aspect of the present invention provides a headrest including a cover, a middle cover disposed inside the cover and in which a hollow portion is formed, and a lock cover installed in the hollow portion and connected to the cover in a back-and-forth direction.
  • a plurality of guide protruding portions are formed on at least three surfaces of a perimeter of the lock cover.
  • a guide groove is formed in the hollow portion to be movable in a back-and-forth direction with respect to the guide protruding portion.
  • An elastic pressurizing segment which elastically pressurizes the guide protruding portion, is formed in the guide groove.
  • the elastic pressurizing segment includes an elastically deformable bar of which both ends are elastically supported by the guide groove and includes a protrusion which is formed on the elastically deformable bar and elastically pressurizes the guide protruding portion.
  • Tooth forms may be formed on the lock cover in a back-and-forth direction.
  • the headrest may further include a lock pin plate which is installed in the middle cover to be laterally movable and provided with one lock pin coupled with the tooth form.
  • the headrest may further include a lock plate which laterally moves the lock pin plate.
  • the headrest may further include a button which laterally moves the lock plate.
  • the tooth forms may be formed on a left surface or a right surface of the lock cover.
  • a pressurizing protrusion which pressurizes a left surface or a right surface of the guide protruding portion to space the tooth form apart from an inner surface of the hollow portion, may be formed in the guide groove.
  • the headrest may further include a stay rod which is installed on the middle cover and in which a holding groove is vertically formed.
  • the lock plate may further include an insertion plate which is coupled to the holding groove.
  • the cover may include a front cover and a rear cover which is coupled to the front cover.
  • the button may be installed on one of the front cover and the rear cover.
  • the headrest may further include a bottom cover which is disposed below the lock plate.
  • a tension rib which comes into contact with the bottom cover, may be formed on the lock plate.
  • the above-described headrest locking device of the present invention has the following effects.
  • a frictional force which occurs when the middle cover moves in a back-and-forth direction with respect to the lock cover may be reduced by forming a guide groove, into which a guide protrusion formed on a perimeter of a lock cover inserted into a hollow portion formed in a middle cover is inserted, in the hollow portion and forming a bar, which comes into contact with the guide protrusion and is disposed to be elastically deformable, in the guide groove.
  • a frictional force between the middle cover and the lock cover may be reduced by forming a first protrusion, which comes into contact with the guide protrusion of the lock cover, on the bar.
  • the frictional force between the middle cover and the lock cover may be reduced by forming a second protrusion in the hollow portion in a direction in which the first protrusion is not formed such that an entirety of the middle cover and the lock cover come into linear contact with each other.
  • the number of necessary components may be reduced and an assembling process may be simplified by injection-molding the hollow portion and the middle cover together.
  • a width of the cover in the back-and-forth direction may be reduced by forming a cover including a front cover and a rear cover coupled to the front cover and installing a button on one of the front cover and the rear cover. Also, since it is unnecessary to additionally install a bottom cover on which the button is installed, the number of components is reduced and an operational process is simplified.
  • FIG. 1 is a front perspective view of a headrest according to an exemplary embodiment of the present invention.
  • FIG. 2 is a front exploded-perspective view of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 3 is a rear perspective view of a front cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 4 is an exploded side perspective view of a button portion of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 5 is a side exploded-perspective view of the button portion of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 6 is a front perspective view of a rear cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 7 is a front perspective view of a middle cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 8 is a rear perspective view of the middle cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 9 is a plane perspective view of the middle cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 10 is a front perspective view of a lock cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 11 is a front perspective view of a lock pin plate of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 12 is a front perspective view of a lock plate of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 13 is a front perspective view of a bottom cover of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 14 is a front exploded-perspective view of a stay rod of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 15 is a side perspective view of a bushing portion of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 16 is a front perspective view of the headrest according to the exemplary embodiment of the present invention (excluding the front cover).
  • FIG. 17 is a front perspective view of the headrest according to the exemplary embodiment of the present invention (excluding the front cover and the rear cover).
  • FIG. 18 is an operational view of manipulation of a vertical position of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 19 is an operational view of a return spring according to manipulation of a button of the headrest according to the exemplary embodiment of the present invention.
  • FIG. 20 is an operational view of manipulation of a back-and-forth position of the headrest according to the exemplary embodiment of the present invention.
  • a back-and-forth direction refers to a longitudinal direction of a vehicle
  • a lateral direction refers to a width direction of the vehicle
  • a vertical direction refers to a vertical direction of the vehicle.
  • a headrest includes a cover 100, a middle cover 200 disposed in the cover 100, a lock cover 300 installed at the middle cover 200 and connected to the cover 100 in a back-and-forth direction, a lock pin plate 400 installed around the lock cover 300, a lock plate 500 which laterally moves the lock pin plate 400, a button portion 140 which laterally moves the lock plate 500, a bottom cover 600 disposed below the lock plate 500, and a stay rod 700 vertically installed on the middle cover 200.
  • the cover 100 includes a front cover 110 and a rear cover 120 coupled with a front of the front cover 110.
  • the front cover 110 is shown in more detail in FIG. 3.
  • the front cover 110 includes a front surface and a perimeter portion connected to an edge of the front surface and formed to protrude backward.
  • First guide portions 111a are formed to protrude backward on upper parts of left and right sides of the perimeter portion of the front cover 110.
  • the first guide portion 111a is formed in a shape of a staple which is open outward, strength thereof increases and a weight thereof decreases.
  • the first guide portion 111a is formed to protrude backward from the perimeter portion of the front cover 110.
  • a first guide portion 121a of the rear cover 120 which will be described below, is coupled with an inside of the first guide portion 111a.
  • a rear part of the first guide portion 111a has a vertical width, which gradually decreases in a backward direction, to be easily coupled with the first guide portion 121a of the rear cover 120.
  • Second guide portions 111b are formed to protrude backward on upper, lower, left, and right sides of the perimeter portion of the front cover 110.
  • the second guide portion 111b has a long plate shape.
  • the second guide portion 111b is formed to protrude backward from the perimeter portion of the front cover 110.
  • a rear part of the second guide portion 111b has a width which gradually decreases in a backward direction to be easily inserted into an inner surface of a perimeter portion of the rear cover 120.
  • the second guide portions 111b allow the front cover 110 and the rear cover 120 to maintain a coupled state thereof without deviating from each other.
  • Third guide portions 111c are formed to protrude backward in upper and lower middle parts of the perimeter portion of the front cover 110.
  • the third guide portion 111c is formed as a cross-shaped lateral cross section so as to have improved strength and a decreased weight.
  • the third guide portion 111c is formed to protrude backward from the perimeter portion of the front cover 110.
  • the third guide portion 111c is coupled with a third guide portion 121c of the rear cover 120 which will be described below.
  • a rear part of the third guide portion 111c has upper, lower, left, and right widths which gradually decrease in a backward direction to be easily coupled with the third guide portion 121c of the rear cover 120.
  • Coupling hooks 112 are formed to protrude backward on upper, lower, and left sides of the perimeter portion of the front cover 110.
  • the coupling hook 112 is formed to protrude backward from the perimeter portion of the front cover 110.
  • Bolt coupling portions 113 are formed to protrude backward in left and right middle parts of the perimeter portion of the front cover 110.
  • a front of the bolt coupling portion 113 is formed to be open outward and frontward.
  • a groove is formed in the bolt coupling portion 113 to pass therethrough in a back-and-forth direction. Accordingly, a bolt may be inserted into the groove.
  • a first lock cover insertion portion 114 is formed to protrude backward in a middle part of the front surface of the front cover 110.
  • the first lock cover insertion portion 114 has an approximately rectangular shape.
  • a plurality of first guide protrusion portions 114a are formed in a back-and-forth direction at a top and bottom of the first lock cover insertion portion 114.
  • a first guide groove 114b is formed between the first guide protruding portions 114a.
  • a side surface of the first lock cover insertion portion 114 is formed to be gradually inclined inward in a backward direction, the lock cover 300 may be inserted more easily. Also, a slimming portion is formed at the first lock cover insertion portion 114 to be open backward and is elastically deformable such that the first lock cover insertion portion 114 is easily inserted into the lock cover 300.
  • First middle cover insertion portions 115 are formed to protrude backward in the middle part of the front surface of the front cover 110.
  • the first middle cover insertion portions 115 are disposed to the left and right of the first lock cover insertion portion 114.
  • a guide protrusion 115a is formed on a perimeter of the first middle cover insertion portion 115 in a back-and-forth direction. Consequently, when the first middle cover insertion portion 115 is inserted into an inner surface of a second middle cover insertion portion 125 of the rear cover 120 which will be described below, a frictional force therebetween is minimized such that assembling may be performed more easily.
  • a first bottom cover insertion portion 116 is formed to protrude backward in a lower part of the front surface of the front cover 110.
  • the first bottom cover insertion portion 116 is disposed below the first lock cover insertion portion 114.
  • the first bottom cover insertion portion 116 is formed to protrude backward from the perimeter portion of the front cover 110.
  • a guide protrusion 116a is formed on a perimeter of the first bottom cover insertion portion 116 in a back-and-forth direction. To this end, a frictional force between the first bottom cover insertion portion 116 and a guide portion 615 of the bottom cover 600, which will be described below, is minimized such that the front cover 110 may move more easily with respect to the bottom cover 600 in a back-and-forth direction.
  • Stay rod through grooves 117 are formed in a lower part of the perimeter portion of the front cover 110 to pass therethrough and which are open backward.
  • a button installation portion 118 is formed in the right of the perimeter portion of the front cover 110.
  • the button installation portion 118 is shown in detail in FIGS. 4 and 5.
  • the button installation portion 118 is formed to protrude rightward. A part of the button installation portion 118 is formed to protrude backward.
  • a groove 118a is formed in the button installation portion 118 to recede leftward such that strength of the button installation portion 118 is increased.
  • Bezel portion insertion grooves 118b are formed at a bottom of a front and a top of a rear of the button installation portion 118 to pass therethrough laterally.
  • a button through groove 118c is formed in a center of the button installation portion 118 to pass therethrough laterally.
  • a coupling hook 137 of the bezel portion 130 is inserted into left and right sides of the button through groove 118c such that the bezel portion 130 is fixed to the button installation portion 118.
  • a hook coupling groove 118d is formed in front of the button installation portion 118 to have open left and rear sides such that the coupling hook 137 of the bezel portion 130 is fixed thereto.
  • the bezel portion 130 is coupled with the button installation portion 118, and the button portion 140 is coupled with the bezel portion 130.
  • the bezel portion 130 and the button portion 140 are shown in detail in FIGS. 4 and 5.
  • a button portion installation groove 131 having an open right side is formed in a middle part of the bezel portion 130.
  • a guide protrusion 132 is laterally formed on a side surface of the button portion installation groove 131 and reduces a frictional force to increase a sense of control when the button portion 140 is moved laterally along the button portion installation groove 131.
  • Hook coupling grooves 133 are formed on an upper part and a lower part of a left side of the bezel portion 130 to vertically pass therethrough and to free the left side. Coupling hooks 141 of the button portion 140 are coupled to the hook coupling grooves 133.
  • a guide portion 134 is formed in the left side of the bezel portion 130 to protrude toward an inside of the button portion installation groove 131.
  • a cross section of the guide portion 134 includes two semicircular arcs which have the same diameter and are spaced apart by a certain interval.
  • a second protruding portion 143 of the button portion 140 is inserted into the guide portion 134 such that lateral movement of the button portion 140 is guided.
  • a right surface of the guide portion 134 comes into contact with a left surface of a holding ridge 145 of the button portion 140 so as to restrict a leftward movable distance of the button portion 140.
  • a first button portion through groove 135 and a second button portion through groove 136 are formed on the left side of the bezel portion 130 to pass therethrough laterally.
  • the first button portion through groove 135 is disposed in a center of the guide portion 134.
  • the first button portion through groove 135 has a circular shape both sides of which protrude along a shape of the guide portion 134.
  • the second button portion through groove 136 is disposed above the first button portion through groove 135.
  • the second button portion through groove 136 has an overall circular arc shape.
  • the second button portion through groove 136 extends to an inside of the coupling hook 137 which will be described below. Consequently, an elastic deformation amount of the coupling hook 137 increases such that coupling is performed more easily.
  • the first button portion through groove 135 and the second button portion through groove 136 are coupled with the button portion installation groove 131.
  • the coupling hooks 141 are coupled to a front and rear of the button portion 140 to protrude leftward.
  • the coupling hooks 141 are disposed in a front and a rear of the first button portion through groove 136.
  • the protruding portion 138 is formed to protrude leftward on a lower part of a front and an upper part of a rear of the left side of the bezel portion 130.
  • the bezel portion 130 is firmly coupled to the button installation portion 118 of the front cover 110 so as to not rotate.
  • the coupling hooks 141 are formed to protrude leftward on an upper part and a lower part of the button portion 140.
  • the coupling hooks 141 are inserted into the hook coupling grooves 133 of the bezel portion 130 so as to prevent the button portion 140 from deviating rightward from the bezel portion 130.
  • a first protruding portion 142 and a second protruding portion 143 are formed to protrude leftward in a center of the button portion 140.
  • the first protruding portion 142 and the second protruding portion 143 are formed along shapes of the first button portion through groove 135 and the second button portion through groove 136 of the bezel portion 130, respectively.
  • the first protruding portion 142 is inserted into the first button portion through groove 135 such that the button portion 140 does not rotate and moves laterally.
  • the second protruding portion 143 is inserted into the second button portion through groove 136. A left surface of the second protruding portion 143 comes into contact with a right surface of the lock plate 500 so as to move the lock plate 500 laterally.
  • Reinforcing ribs 144 are formed on an upper part of a right side of the second protruding portion 143 such that strength of the second protruding portion 143 increases.
  • the holding ridges 145 are formed in the button portion 140 to protrude leftward on upper, lower, front, and rear parts on the basis of the second protruding portion 143.
  • the rear cover 120 is shown in more detail in FIG. 6.
  • the rear cover 120 includes a rear surface and a perimeter portion connected to an edge of the rear surface and formed to protrude frontward.
  • the first guide portions 121a are formed to protrude frontward on upper parts of left and right sides of the perimeter portion of the rear cover 120.
  • the first guide portion 121a is formed in a shape of a staple which is open outward, strength thereof increases and a weight thereof decreases.
  • the first guide portion 121a is formed to protrude frontward from the perimeter portion of the rear cover 120.
  • a front part of the first guide portion 121a has a vertical width, which gradually decreases in a frontward direction and is easy to elastically deform, that is easily coupled with the first guide portion 111a of the front cover 110.
  • Second guide portions 121b are formed to protrude frontward on upper, lower, left, and right sides of the perimeter portion of the rear cover 120.
  • the second guide portions 121b have the same shape as that of the second guide portions 111b of the front cover 110.
  • the second guide portions 121b are disposed at positions which do not overlap with the second guide portions 111b of the front cover 110.
  • the second guide portions 121b allow the front cover 110 and the rear cover 120 to be maintained in a coupled state without deviating from each other.
  • the third guide portions 121c are formed to protrude frontward in upper and lower middle parts of the perimeter portion of the rear cover 120.
  • the third guide portions 121c have a groove shape such that the third guide portions 111c of the front cover 110 may be inserted therein.
  • Coupling grooves 122 are formed to protrude frontward on upper, lower, and left sides of the perimeter portion of the rear cover 120.
  • the coupling hooks 112 of the front cover 110 are inserted into the coupling grooves 122. Consequently, the front cover 110 and the rear cover 120 are more firmly coupled with each other.
  • Bolt coupling portions 123 are formed to protrude frontward in left and right middle parts of the perimeter portion of the rear cover 120.
  • a rear of the bolt coupling portion 123 is formed to be open outward and backward.
  • a groove is formed to be open frontward in the bolt coupling portion 123. Consequently, a bolt inserted in the bolt coupling portion 113 of the front cover 110 is inserted into the bolt coupling portion 123 of the rear cover 120 such that the front cover 110 and the rear cover 120 may be easily coupled with each other.
  • the rear cover 120 is directly coupled to the front cover 110 without an additional component between the front cover 110 and the rear cover 120 such that a length in a back-and-forth direction of the headrest may be minimized.
  • a second lock cover insertion portion 124 is formed to protrude frontward in a middle part of the rear surface of the rear cover 120.
  • the second lock cover insertion portion 124 has the same shape as that of the first lock cover insertion portion 114.
  • the second lock cover insertion portion 124 includes a second guide protruding portion 124a and a second guide groove 124b, which are located collinearly with the first guide protruding portion 114a and the first guide groove 114b, respectively.
  • the second middle cover insertion portions 125 are formed to protrude frontward in the middle part of the rear surface of the rear cover 120.
  • the second middle cover insertion portions 125 are disposed on left and right sides of the second lock cover insertion portion 124.
  • a guide protrusion 125a is formed on a perimeter of the second middle cover insertion portion 125 in a back-and-forth direction. Consequently, a frictional force between the second middle cover insertion portion 125 and a guide groove 203 of the middle cover 200 is minimized such that the rear cover 120 may move more easily with respect to the middle cover 200 in a back-and-forth direction.
  • a second bottom cover insertion portion 126 is formed to protrude frontward in a lower part of the rear surface of the rear cover 120.
  • the second bottom cover insertion portion 126 is disposed below the second lock cover insertion portion 124.
  • the second bottom cover insertion 126 is formed to protrude frontward from the perimeter portion of the rear cover 120.
  • a guide protrusion 126a is formed on a perimeter of the second bottom cover insertion portion 126 in a back-and-forth direction. Consequently, when the second bottom cover insertion portion 126 is inserted into an inner surface of the first bottom cover insertion portion 116 of the front cover 110, a frictional force therebetween is minimized such that assembling may be performed more easily.
  • Stay rod through grooves 127 are formed in a lower part of a perimeter portion of the rear cover 120 to pass therethrough vertically and to be open frontward.
  • a stay rod support portion 128 is formed to protrude frontward above the perimeter portion of the rear cover 120.
  • the stay rod support portion 128 is formed to be connected to a bottom end of the third guide portion 121c formed thereabove.
  • a guide protrusion 128a is formed on a bottom surface of the stay rod support portion 128 in a back-and-forth direction.
  • the guide protrusion 128a may come into contact with a top surface of a horizontal portion 720 of the stay rod 700, which will be described below. Consequently, a frictional force between the rear cover 120 and the stay rod 700 is minimized such that the rear cover 120 may move more easily with respect to the stay rod 700 in a back-and-forth direction.
  • the stay rod support portion 128 prevents the stay rod 700 from moving upward further than the stay rod support portion 128.
  • a button installation groove 129 is formed in the right of the perimeter portion of the rear cover 120.
  • the button installation groove 129 is formed to have an open front and is coupled with the button installation portion 118 of the front cover 110.
  • the middle cover 200 is shown in more detail in FIGS. 7 to 9.
  • the middle cover 200 includes a lower body 210 and an upper body 220 formed above the lower body 210.
  • the middle cover 200 has an overall rectangular shape.
  • a horizontal portion insertion groove 201 is formed in the upper body 220 to pass therethrough vertically.
  • the horizontal portion insertion groove 201 is formed lengthwise in a lateral direction.
  • a width of the horizontal portion insertion groove 201 in the back-and-forth direction is formed to be adequately large such that the horizontal portion 720 of the stay rod 700, which will be described below, may move freely in a vertical direction in the horizontal portion insertion groove 201.
  • Bushing insertion grooves 202 are formed in a left side and a right side of the horizontal portion insertion groove 201 to pass therethrough vertically.
  • the bushing insertion groove 202 is formed through the lower body 210 and the upper body 220.
  • the bushing insertion groove 202 communicates with the horizontal portion insertion groove 201.
  • the bushing insertion groove 202 according to a shape of a bushing portion 800, has a rounded quadrangular pillar shape in the lower body 210 and a cylindrical shape in the upper body 220.
  • Bushing coupling grooves 207 are formed in both sides of the lower body 210 to communicate with the bushing insertion grooves 202 and pass therethrough laterally.
  • the guide grooves 203 are formed in a left side and a right side of the lower body 210 to pass therethrough in a back-and-forth direction.
  • the guide grooves 203 are disposed further inside than the bushing insertion grooves 202.
  • the second middle cover insertion portions 125 of the rear cover 120 are inserted into the guide grooves 203.
  • Slimming portions 206 are formed above the lower body 210 to communicate with the both guide grooves 203.
  • a weight of the lower body 210 may be decreased and the second middle cover insertion portions 125 of the rear cover 120 may be inserted more easily into the guide grooves 203.
  • Blocking protrusions 219 are formed at a top of the lower body 210 to protrude toward the bushing insertion grooves 202.
  • the blocking protrusion 219 is disposed between the bushing insertion groove 202 and the slimming portion 206.
  • a top end of an intermediate part 820 of the bushing portion 800, which will be described below, is blocked by the blocking protrusion 219 so as to be prevented from deviating upward further than the blocking protrusion 219. Also, the blocking protrusion 219 prevents a vertical portion 710 of the stay rod 700, which will be described below, from tilting inward.
  • a guide protrusion 224 is formed to protrude vertically on an inner surface of the bushing insertion groove 202.
  • the guide protrusion 224 is inserted into an incised portion 812 of the bushing portion 800, which will be described below, and comes into contact with the vertical portion 710 of the stay rod 700 which is installed inside the bushing portion 800.
  • the guide protrusion 224 guides vertical movement of the vertical portion 710 and prevents the vertical portion 710 from tilting outward.
  • a hollow portion 218 is formed in a middle part of the lower body 210.
  • the hollow portion 218 is disposed between the guide grooves 203.
  • the hollow portion 218 is shown in detail in FIGS. 8 and 17.
  • a hollow 204 is formed in a center of the hollow portion 218 to pass therethrough in a back-and-forth direction.
  • a lock cover 300 is inserted in the hollow 204.
  • the hollow portion 218 has a rectangular shape whose width is longer than a length thereof overall.
  • Third guide grooves 218a are formed on a top and bottom of the hollow portion 218.
  • the two third guide grooves 218a are formed on the top of the hollow portion 218, and three guide grooves 218a are formed on the bottom of the hollow portion 218.
  • a third guide protruding portion 218b is formed between the third guide grooves 218a.
  • the third guide protruding portion 218b is inserted into a fourth guide groove 306 of the lock cover 300, which will be described below.
  • a horizontal elastic pressurizing segment is formed on the third guide groove 218a of the hollow portion 218.
  • the horizontal elastic pressurizing segment includes a horizontal bar 218c and a horizontal bar protrusion 218d formed on the horizontal bar 218c.
  • the horizontal bar 218c is disposed to be spaced apart from a top surface or a bottom surface of the third guide groove 218a so as to be elastically deformable.
  • a horizontal bar protrusion 218d is formed on the horizontal bar 218c to come into contact with a top surface or a bottom surface of the fourth guide protruding portion 305a of the lock cover 300, which is inserted into the third guide groove 218a. Consequently, a frictional force between the middle cover 200 and the lock cover 300 is reduced.
  • a vertical elastic pressurizing segment is formed on the right side of the hollow portion 218.
  • the vertical elastic pressurizing segment includes a vertical bar 218e and a vertical bar protrusion 218f formed on the vertical bar 218e.
  • the vertical bar 218e is disposed on an inner surface of the right side of the hollow portion 218 so as to be elastically deformable.
  • the vertical bar protrusion 218f is formed on the vertical bar 218e to come into contact with a right surface of the right guide protruding portion 305b of the lock cover 300. Consequently, a frictional force between the middle cover 200 and the lock cover 300 is reduced.
  • a third guide groove pressurizing protrusion 218g is formed in the third guide groove 218a of the hollow portion 218 to come into contact with a left surface of the fourth guide protruding portion 305a of the lock cover 300.
  • the pressurizing protrusion 218g is disposed closer to a center of the hollow portion 218 than the horizontal bar 218c.
  • Parts of a top surface and a bottom surface of the lock cover 300 come into linear contact with the hollow portion 218 due to the horizontal bar protrusion 218d.
  • a part of a right surface of the lock cover 300 comes into linear contact with the hollow portion 218 due to the vertical bar protrusion 218f.
  • a part of a left surface of the lock cover 300 comes into linear contact with the hollow portion 218 due to the pressurizing protrusion 218g. Accordingly, an outer surface of the lock cover 300 does not come into contact with an inner surface of the hollow portion 218 except the parts which come into linear contact with the hollow portion 218.
  • a slimming portion is formed on an entirety of the hollow portion 218 such that elastic deformation is possible, strength increases, and a weight thereof decreases.
  • a lock pin plate guide groove 205 is formed in a top of the hollow portion 218 to communicate with the hollow 204 and to pass therethrough vertically.
  • a guide protruding portion 431 of the lock pin plate 400 which will be described below, is inserted into the lock pin plate guide groove 205 so as to guide lateral movement of the guide protruding portion 431 simultaneously while restricting a range of the lateral movement.
  • a lock pin plate installation groove 208 is formed in a bottom of the hollow portion 218 to communicate with the hollow 204 and to pass therethrough vertically.
  • the lock pin plate installation groove 208 is formed according to a shape of the lock pin plate 400, which will be described below, such that the lock pin plate 400 is inserted into the lock pin plate installation groove 208 from a bottom to a top thereof.
  • a left bottom plate 211 and a right bottom plate 212 are formed on the left side and the right side of the lower body 210 on the basis of a bottom end of the hollow portion 218.
  • the left bottom plate 211 and the right bottom plate 212 have a quadrangular plate shape.
  • the left bottom plate 211 is formed to protrude leftward and in a back-and-forth direction
  • the right bottom plate 212 is formed to protrude only in a back-and-forth direction.
  • First bottom cover coupling grooves 215a are formed at fronts of the left bottom plate 211 and the right bottom plate 212 to have open fronts and to pass therethrough vertically.
  • the first bottom cover coupling grooves 215a are disposed below the guide grooves 203.
  • a second bottom cover coupling groove 215b is formed to have an open rear at a rear of the left bottom plate 211 and to pass therethrough vertically.
  • a third bottom cover coupling groove 215c is formed to have an open rear and right side at a rear of the right bottom plate 212 and to pass therethrough vertically.
  • the second bottom cover coupling groove 215b and the third bottom cover coupling groove 215c are disposed in the rear of the bushing insertion groove 202.
  • Bottom cover coupling grooves 216 are formed at the rears of the left bottom plate 211 and the right bottom plate 212 to have open rears and to pass therethrough vertically.
  • the bottom cover through grooves 216 are disposed below the guide grooves 203.
  • Bottom cover fastening portions 217 are formed to protrude backward on the left side and the right side of the lower body 210.
  • the bottom cover fastening portions 217 are disposed between the guide grooves 203 and the bottom cover through grooves 216.
  • the groove communicates with the slimming portion 206.
  • Two returning spring support plates 213 are formed to be spaced apart and protrude downward in a center of a bottom surface of the lower body 210.
  • the returning spring support plates 213 are disposed in front of the lock pin plate installation grooves 208.
  • first and second returning springs 450 and 540 which will be described below, are blocked by the returning spring support plates 213.
  • Two horizontal portion support portions 214 are formed to be spaced apart and protrude upward on a top surface of the lower body 210.
  • the horizontal portion support portions 214 are disposed between the lock pin plate guide grooves 205 and the slimming portions 206.
  • the horizontal portion support portion 214 is formed to have a V shape when viewed from a left side and is elastically deformed by the horizontal portion 720 when the middle cover 200 is moved upward until the horizontal portion 720 of the stay rod 700, which will be described below, comes into contact with the horizontal portion support portion 214. Since the middle cover 200 returns to an original position due to the elastic force even when the middle cover 200 is moved further upward, it is natural to move the middle cover 200 upward only to a last level.
  • Guide portions 221 are formed to protrude leftward and rightward on a left side and a right side of the upper body 220.
  • the guide portions 221 are formed in a shape of a staple.
  • a guide groove 222 is formed in the guide portion 221 to pass therethrough in a back-and-forth direction and to have an open left side or an open right side.
  • the first guide portion 121a of the rear cover 120 is inserted into the guide groove 222.
  • Reinforcing portions 223 are formed to protrude upward in front and rear of a top surface of the guide portion 221.
  • the lock cover 300 is shown in more detail in FIG. 10.
  • the lock cover 300 is formed to have an overall rectangular parallelepiped shape whose length in a back-and-forth direction is longer than lengths thereof in any other directions.
  • the fourth guide protruding portions 305a are formed to protrude in a back-and-forth direction on top and bottom of the lock cover 300.
  • a shape of an outer surface of the lock cover 300 is formed to have a shape similar to a shape of the hollow 204 of the middle cover 200.
  • the tooth form 301 and the linear portion 302 are formed on the left surface of the lock cover 300.
  • the tooth form 301 is formed to have an adequate area in which a lock pin 410, which will be described below, is insertable.
  • the linear portions 302 are formed in a front and rear of the tooth form 301.
  • a slimming portion 303 is formed to have an open front or an open rear in the linear portion 302.
  • a through hole 304 is formed in the lock cover 300 to pass therethrough in a back-and-forth direction.
  • a shape of the through hole 304 is similar to the shapes of the first lock cover insertion portion 114 of the front cover 110 and the second lock cover insertion portion 124 of the rear cover 120.
  • a front of the lock cover 300 is inserted into the first lock cover insertion portion 114 and a rear of the lock cover 300 is inserted into the second lock cover insertion portion 124 so as to support middle parts of the front cover 110 and the rear cover 120.
  • the two fourth guide protruding portions 305a are formed on an upper part and a lower part of the lock cover 300.
  • the fourth guide groove 306 is formed between the fourth guide protruding portions 305a.
  • the fourth guide protruding portion 305a is inserted into the third guide groove 218a of the middle cover 200, and the third guide protruding portion 218b of the middle cover 200 is inserted into the fourth guide groove 306.
  • the right guide protruding portion 305b is formed in the right side of the lock cover 300.
  • the right guide protruding portion 305b is inserted into a right side of the hollow 204 of the middle cover 200.
  • the lock pin plate 400 is shown in more detail in FIG. 11.
  • the lock pin plate 400 includes a body portion 430, a lock pin installation plate 420 formed on a left side of the body portion 430, and the lock pin 410 which is inserted into the lock pin installation plate 420.
  • the body portion 430 is formed in a shape of a staple whose left and right directions change overall.
  • the guide protruding portion 431 is formed to protrude upward on top of the body portion 430.
  • the guide protruding portion 431 is inserted into the lock pin plate guide groove 205 of the middle cover 200.
  • a returning spring insertion portion 440 is formed to protrude downward on a bottom of the body portion 430.
  • the returning spring insertion portion 440 is formed to protrude frontward.
  • An insertion protrusion 441 is formed to protrude leftward in front of the returning spring insertion portion 440.
  • the first returning spring 450 is installed on the insertion protrusion 441. That is, a right side of the first returning spring 450 is blocked by the returning spring insertion portion 440 and the left side of the first returning spring 450 is blocked by the returning spring support plate 213 of the middle cover 200.
  • the lock pin installation plate 420 is formed to protrude frontward.
  • a groove is formed in the lock pin installation plate 420 to pass therethrough vertically, and the lock pin 410 is installed in the groove.
  • the lock pin 410 is formed to have an adequate thickness such that the tooth form 301 of the lock cover 300 may be supported by one lock pin 410. Consequently, since the lock pin plate 400 may be configured using a smaller area than when two or more lock pins 410 are used, a length in a back-and-forth direction of the lock pin plate 400 is minimized.
  • the lock pin plate 400 is installed in the lock pin plate installation groove 208 of the middle cover 200 from a lower side to an upper side.
  • the lock pin plate 400 is disposed to surround the lock cover 300 which is inserted into the middle cover 200.
  • the middle cover 200 is formed to have an adequately large size so as to not come into contact with the lock cover 300 except parts which come into contact therewith due to the tooth form 301 and the lock pin 410.
  • the lock plate 500 is shown in more detail in FIG. 12.
  • the lock plate 500 has a quadrangular plate shape.
  • the lock plate 500 includes a body portion 510 and a push transfer portion 520 formed to protrude upward on a right side of the body portion 510.
  • Bushing portion through holes 501 are formed in a left side and a right side of the body portion 510 to pass therethrough vertically.
  • the bushing portion through hole 501 has a quadrangular left side and a semicircular right side according to a shape of a perimeter of the intermediate part 820 of the bushing portion 800 which will be described below.
  • An insertion plate 530 is insertion-molded on a left side of the bushing portion through hole 501 such that a part of the insertion plate 530 is exposed inside the bushing portion through hole 501.
  • the insertion plate 530 has a steel material and is inserted into a holding groove 711 of the vertical portion 710 of the stay rod 700, which will be described below, so as to fix a vertical position of the headrest and to support a downward load.
  • a lock pin plate insertion groove 511 and a second lock pin plate insertion groove 512 are formed in a center of the body portion 510 to pass therethrough vertically.
  • the first lock pin plate insertion groove 511 has an L shape of which a front is formed to protrude rightward when viewed from above, and the second lock pin plate insertion groove 512 has an L shape whose left and right directions are opposite thereto and of which a front is formed to protrude leftward.
  • the returning spring support plates 213 of the middle cover 200 are inserted into fronts of the first and second lock pin plate insertion grooves 511 and 512.
  • the lock pin installation plate 420 formed below the lock pin plate 400 is inserted into a left side of the first lock pin plate insertion groove 511.
  • a bottom of the returning spring insertion portion 440 of the lock pin plate 400 is inserted into a right side of the second lock pin plate insertion groove 512.
  • a returning spring insertion portion 513 is formed between a right protruding portion of the first lock pin plate insertion groove 511 and a left protruding portion of the second lock pin plate insertion groove 512.
  • the returning spring insertion portion 513 is formed to protrude below the body portion 510. A right side of the returning spring insertion portion 513 is blocked by the returning spring support plate 213 of the middle cover 200.
  • An insertion protrusion 513a is formed to protrude leftward on the returning spring insertion portion 513.
  • the second returning spring 540 is installed on the insertion protrusion 513a. That is, a right side of the second returning spring 540 is blocked by the returning spring insertion portion 513 and a left side of the second returning spring 540 is blocked by the returning spring support plate 213 of the middle cover 200.
  • Bottom cover through grooves 514 are formed in a left side and a right side of a rear of the body portion 510 to have an open rear and to pass therethrough vertically.
  • the bottom cover through grooves 514 are disposed below the bottom cover through grooves 216 of the middle cover 200.
  • the bottom cover through grooves 514 are formed to be larger than the bottom cover through grooves 216 in consideration of a distance by which the lock plate 500 moves laterally.
  • First and second protrusions 515a and 515b are formed to protrude upward at a front and a rear of the body portion 510.
  • the second protrusion 515b at the rear is formed between the bottom cover through grooves 216, and the first protrusion 515a is formed between the bottom cover through grooves 216 and both ends.
  • the first and second protrusions 515a and 515b at the front are formed to be symmetrical to the first and second protrusions 515a and 515b at the rear.
  • a frictional force between the lock plate 500 and the middle cover 200 is minimized by the first and second protrusions 515a and 515b such that the lock plate 500 may be moved more easily in a lateral direction.
  • Side protrusions 516 are formed at the front and the rear of the body portion 510 to protrude frontward or backward.
  • the side protrusions 516 come into contact with an inner surface of the bottom cover 600 on which the lock plate 500 is installed. Consequently, a frictional force between the lock plate 500 and the bottom cover 600 is minimized such that the lock plate 500 may be moved more easily in the lateral direction.
  • Grooves 517 are formed in the left side and the right side of the body portion 510 to pass therethrough vertically.
  • the grooves 517 are formed between the bushing portion through hole 501 and the first lock pin plate insertion groove 511 and between the bushing portion through hole 501 and the second lock pin plate insertion groove 512.
  • a tension rib 518 is formed to protrude leftward on a right inner surface of the groove 517.
  • the tension rib 518 includes a linear portion 518a whose one side is connected to an inner surface of the groove 517 and which is inclined downward toward a left side and includes a curved portion 518b whose one side is connected to the other side of the linear portion 518a and which is formed to be curved further clockwise toward a left side.
  • a bottom end of the curved portion 518b comes into contact with a top surface of the bottom cover 600.
  • the push transfer portion 520 is formed to have an open left side, an open front, and an open top. That is, the push transfer portion 520 is formed to have a blocked right side and a blocked rear.
  • a reinforcing portion 521 is formed at a front of the push transfer portion 520 to protrude leftward.
  • the reinforcing portion 521 is formed to gradually protrude leftward from a top and to a bottom thereof. Due to the reinforcing portion 521, strength of the front of the push transfer portion 520 is increased.
  • the bottom cover 600 is shown in more detail in FIG. 13.
  • the bottom cover 600 includes a bottom plate 610 formed to have a quadrangular plate shape and a perimetrical wall 620 which is connected to a front end and a rear end of the bottom plate and protrudes upward.
  • a lock plate installation groove 601 is formed in the bottom cover 600 by the bottom plate 610 and the perimetrical wall 620 to pass therethrough laterally and have an open top.
  • Bushing portion through holes 611 are formed in a left side and a right side of the bottom plate 610 to pass therethrough vertically.
  • the bushing portion through hole 611 has a shape according to a shape of a lower part 830 of the bushing portion 800, which will be described below.
  • a vertical portion support protrusion 612 is formed to protrude leftward on a right inner surface of the bushing portion through hole 611.
  • the vertical portion support protrusion 612 is inserted into a first incised portion 831 of the lower part 830 of the bushing portion 800, which will be described below, and comes into contact with the vertical portion 710 of the stay rod 700.
  • a lock pin plate support pin 613 which protrudes upward, and a returning spring insertion groove 614, which is disposed to a right of the lock pin plate support portion 613 and is recessed downward, are formed in a middle part of the bottom plate 610.
  • a top surface of the lock pin plate support portion 613 comes into contact with a bottom surface of the lock pin installation plate 420 of the lock pin plate 400.
  • a lateral length of the lock pin plate support portion 613 is formed to be longer than a lateral length of the lock pin installation plate 420 in consideration of a distance by which the lock pin plate 400 is moved laterally.
  • a front of the returning spring insertion groove 614 is formed to protrude leftward.
  • a bottom of the returning spring insertion portion 440 of the lock pin plate 400 is inserted into a right side of the returning spring insertion groove 614. Consequently, the returning spring insertion portion 440 is moved laterally within a lateral width of the returning spring insertion groove 614.
  • a guide portion 615 is formed to protrude downward in the middle part of the bottom plate 610.
  • the guide portion 615 has an overall inverted triangle shape and includes a groove formed in a middle part to pass therethrough laterally. A first bottom cover insertion portion 116 of the front cover 110 is inserted into the groove.
  • Bolt coupling portions 621 are formed to protrude upward on a left side and a right side of a rear of the perimetrical wall 620.
  • the bolt coupling portions 621 are formed to protrude toward the lock plate installation groove 601.
  • the bolt coupling portion 621 is disposed below the bottom cover through groove 216 of the middle cover 200. That is, the bolt coupling portions 621 are installed to sequentially pass through the bottom cover through grooves 514 of the lock plate 500 and the bottom cover through groove 216 of the middle cover 200 and to protrude above the left bottom plate 211 and the right bottom plate 212.
  • the bolt coupling portion 621 includes a first groove, which is formed to be open backward and upward in an upper part of the bolt coupling portion 621 and a second groove formed in the first groove to pass therethrough in a back-and-force direction.
  • a bolt is inserted from a rear toward a front into the second groove and is installed in the bottom cover fastening portion 217 of the middle cover 200.
  • the first groove prevents the bolt from protruding further backward than a rear surface of the perimetrical wall 620.
  • Coupling hooks 622 are formed to protrude upward on a left side and a right side of a front and the rear of the perimetrical wall 620.
  • the coupling hooks 622 formed at the front of the perimetrical wall 620 are disposed below the second and third bottom cover coupling grooves 215b and 215c of the middle cover 200.
  • the coupling hooks 622 formed at the rear of the perimetrical wall 620 are disposed more outward than the bolt coupling portions 621 and below the first bottom cover coupling groove 215a of the middle cover 200.
  • the coupling hooks 622 protrude above the first, second, and third bottom cover coupling grooves 215a, 215b, and 215c of the middle cover 200 to be hook-coupled thereto.
  • a through hole 623 is formed inside the coupling hook 622 to pass therethrough vertically. Due to the through hole 623, the coupling hook 622 is elastically deformable in a back-and-forth direction while being coupled, and thus a coupling operation is easily performed.
  • the perimetrical wall 620 is formed to be spaced at a certain distance from a left end of the bottom plate 610. Consequently, a lock plate interference prevention groove 624 is formed in a left side of the bottom cover 600 to pass therethrough in a back-and-forth direction. A bottom of the push transfer portion 520 of the lock plate 500 is inserted into the lock plate interference prevention groove 624.
  • the stay rod 700 includes two vertical portions 710 whose one ends are inserted into a seat of a vehicle and a horizontal portion 720 connected to each of the other ends of the vertical portions 710.
  • the stay rod 700 is configured to be separated into the vertical portions 710 and the horizontal portion 720, a shape of a bottom of the vertical portion 710 may be freely changed.
  • the vertical portions 710 are formed of a steel material and the horizontal portion 720 is formed of a plastic material so as to decrease a weight of the stay rod 700.
  • the vertical portions 710 have a pipe shape in a vertical direction.
  • a plurality of holding grooves 711 are formed in a left side of an upper part of the vertical portion 710.
  • the holding grooves 711 are disposed in parallel in a vertical direction.
  • the holding groove 711 has an adequately large size such that the insertion plate 530 of the lock plate 500 is insertable therein.
  • An insertion protrusion 712 is formed at a front of the upper part of the vertical portion 710 to protrude toward an inside of the vertical portion 710.
  • the horizontal portion 720 has a shape in which a left side and a right side of a lateral bar are bent downward.
  • Insertion grooves 721 are formed to recede backward in fronts of the bent portions.
  • the insertion protrusion 712 of the vertical portion 710 is inserted into the insertion groove 721. Consequently, the vertical portions 710 may be coupled with the horizontal portion 720.
  • a plurality of slimming portions 722 are formed in a front and a rear of an upper part of the horizontal portion 720 such that strength of the horizontal portion 720 increases and a weight thereof decreases.
  • the bushing portion 800 which is inserted outside the upper part of the vertical portion 710, may be further included.
  • the bushing portion 800 is shown in more detail in FIG. 15.
  • the bushing portion 800 includes an upper part 810, which is inserted into the upper body 220 of the middle cover 200, the intermediate part 820, which is connected to the upper body 220 and inserted into the lower body 210 of the middle cover 200, and the lower part 830 which is connected to the intermediate part 820 and inserted into the bottom cover 600.
  • the bushing portion 800 includes a stay rod through hole 811 which has an overall pipe shape and is formed to pass therethrough vertically.
  • the upper part 810 has a circular pipe shape which is open toward a center of the middle cover 200.
  • the incised portion 812 is formed in a side opposite the opened part to pass therethrough laterally and to have an open upper part.
  • the guide protrusion 224 of the middle cover 200 is inserted into the incised portion 812. Due to the incised portion 812, the upper body 220 may be elastically deformable in a back-and-forth direction.
  • a support protruding portion 813 is vertically formed on an inner surface of the upper part 810.
  • the support protruding portion 813 comes into contact with an outer surface of the vertical portion 710. Due to the support protruding portion 813, a frictional force between the bushing portion 800 and the vertical portion 710 is minimized.
  • Elastic protrusions 814 are formed at a front and a rear of a bottom of the upper part 810 to protrude inward. Grooves are formed in left and right sides and a lower part of the elastic protrusion 814 to pass therethrough in a back-and-forth direction such that the elastic protrusion 814 is elastically deformable. The elastic protrusion 814 comes into contact with the outer surface of the vertical portion 710 to prevent the vertical portion 710 from tilting frontward and backward.
  • the intermediate part 820 has a semicircular left side and a quadrangular right side with rounded corners on the basis of the bushing portion 800 formed on the left side.
  • the bushing portion 800 formed on the right side is laterally symmetrical to the bushing portion 800 formed on the left side.
  • Coupling protrusions 821 are formed to protrude frontward or backward on the front and rear of the intermediate part 820.
  • the coupling protrusions are inserted into the bushing coupling grooves 207 of the middle cover 200.
  • the coupling protrusion 821 has a protruding height which gradually increases from a top toward a bottom. Consequently, when the bushing portion 800 is inserted into the bushing insertion groove 202 of the middle cover 200 from a bottom toward a top, the coupling protrusions 821 are easily coupled to the bushing coupling grooves 207 and do not easily deviate from the bushing coupling grooves 207 after being coupled.
  • the first incised portions 831 are formed in a left side and a right side of a bottom of the lower part 830 to pass therethrough in upward, downward, and lateral directions.
  • Second incised portions 832 are formed in a left side and a right side of a top of the lower part 830 to have an open right side or an open left side to be drawn such that the left side or the right side is opened.
  • the second incised portions 832 are formed to be deeper than the first incised portions 831.
  • the middle cover 200 may move more easily with respect to the vertical portions 710 in a vertical direction and operational noise may be reduced.
  • the lock plate 500 moves leftward and the insertion plate 530 installed on the lock plate 500 also moves leftward such that the insertion plate 530 deviates from the holding groove 711 of the vertical portion 710 as shown in FIG. 18B.
  • the first returning spring 450 which is compressed by the button portion 140 as shown in FIG. 19B, is elastically restored as shown in FIG. 19A such that the lock plate 500 moves rightward and the button portion 140 and the insertion plate 530 are also moved rightward.
  • the insertion plate 530 is inserted into the holding groove 711 which is located above the holding groove 711 in which the insertion plate 530 is inserted in FIG. 18A such that the headrest is moved upward and fixed.
  • 111b second guide portion
  • 111c third guide portion
  • 121b second guide portion
  • 121c third guide portion
  • 218e vertical bar
  • 218f vertical bar protrusion
  • 515a first protrusion
  • 515b second protrusion
  • 518 tension rib
  • 518a linear portion
  • 620 perimetrical wall
  • 621 bolt coupling portion

Landscapes

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

Abstract

L'invention concerne un appui-tête qui comprend un capot, un capot intermédiaire disposé à l'intérieur du capot et dans lequel est formée une portion creuse, et un capot de verrouillage installé dans la portion creuse et relié au capot dans une direction avant-arrière. Du fait d'une structure de la portion creuse, le frottement avec le capot de verrouillage peut ici être réduit au minimum de manière à réduire le nombre de composants nécessaires et simplifier un processus opérationnel.
PCT/KR2019/004735 2019-03-05 2019-04-19 Appui-tête Ceased WO2020179965A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190025253A KR102122712B1 (ko) 2019-03-05 2019-03-05 헤드레스트
KR10-2019-0025253 2019-03-05

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Publication Number Publication Date
WO2020179965A1 true WO2020179965A1 (fr) 2020-09-10

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PCT/KR2019/004735 Ceased WO2020179965A1 (fr) 2019-03-05 2019-04-19 Appui-tête

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KR (1) KR102122712B1 (fr)
WO (1) WO2020179965A1 (fr)

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EP4382359A1 (fr) * 2022-12-08 2024-06-12 TESCA France Appui-tête de siège de véhicule automobile
FR3146845A1 (fr) * 2023-03-23 2024-09-27 Tesca France Appui-tête de siège de véhicule automobile
EP4438404A1 (fr) * 2023-03-23 2024-10-02 TESCA France Appui-tête de siège de véhicule automobile

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KR102419987B1 (ko) * 2020-08-27 2022-07-13 (주)디앤엠솔루션즈 헤드레스트 모듈
KR102419988B1 (ko) * 2020-09-01 2022-07-13 (주)디앤엠솔루션즈 헤드레스트 모듈
KR102419989B1 (ko) * 2020-11-05 2022-07-13 (주)디앤엠솔루션즈 헤드레스트 어셈블리
KR102486229B1 (ko) * 2020-12-07 2023-01-10 (주)디앤엠솔루션즈 헤드레스트 모듈용 스테이 제조 방법 및 그에 따라 제조된 헤드레스트 모듈용 스테이

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* Cited by examiner, † Cited by third party
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EP4382359A1 (fr) * 2022-12-08 2024-06-12 TESCA France Appui-tête de siège de véhicule automobile
FR3142957A1 (fr) * 2022-12-08 2024-06-14 Tesca France Appui-tête de siège de véhicule automobile
FR3146845A1 (fr) * 2023-03-23 2024-09-27 Tesca France Appui-tête de siège de véhicule automobile
EP4438404A1 (fr) * 2023-03-23 2024-10-02 TESCA France Appui-tête de siège de véhicule automobile

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