WO2014181628A1 - ヘッドレスト支持構造 - Google Patents
ヘッドレスト支持構造 Download PDFInfo
- Publication number
- WO2014181628A1 WO2014181628A1 PCT/JP2014/060219 JP2014060219W WO2014181628A1 WO 2014181628 A1 WO2014181628 A1 WO 2014181628A1 JP 2014060219 W JP2014060219 W JP 2014060219W WO 2014181628 A1 WO2014181628 A1 WO 2014181628A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- headrest
- seat
- spring
- support
- bracket
- Prior art date
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
- B60N2/806—Head-rests movable or adjustable
- B60N2/838—Tiltable
-
- 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
-
- 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
-
- 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
- B60N2/897—Head-rests with sleeves located in the back-rest for guiding the rods of the head-rest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2205/00—General mechanical or structural details
- B60N2205/20—Measures for elimination or compensation of play or backlash
Definitions
- the present invention relates to a headrest support structure that elastically supports a headrest on a seat back.
- the engine speed is decreasing at the time of idling of the engine for the purpose of reducing the fuel consumption of the vehicle.
- the frequency range of engine vibration during idling includes the resonance frequency of the vehicle seat, which leads to a decrease in drivability. Therefore, development of a seat that attenuates vibration in the front-rear direction of the seat by swinging the headrest in the front-rear direction relative to the seat back when an excitation force is transmitted to the seat is underway.
- Patent Document 1 discloses an example of a headrest support structure that elastically supports a headrest on a seat back.
- the support structure includes a bracket 100 provided on the seat back and a cylindrical support member 120 that supports a headrest stay 111 protruding from the headrest 110.
- the support member 120 is elastically supported by the bracket 100 by springs 130 and 140 disposed at two different positions in the vertical direction of the seat.
- the headrest 110 elastically supported on the seat back by the headrest support structure functions as a mass system of the dynamic damper, and the springs 130 and 140 of the headrest support structure function as a spring system of the dynamic damper.
- the support member 120 tilts around the tilt center between the springs 130 and 140 in the vertical direction of the seat.
- the tilting of the support member 120 causes the headrest 110 supported by the support member 120 through the headrest stay 111 to swing relative to the seat back in the front-rear direction, so that the vibration of the seat is attenuated. ing.
- the size and shape of various parts such as the headrest stay 111, the support member 120, and the bracket 100 vary within a tolerance range. Further, when assembling such various parts, an assembly error occurs. For this reason, the range of the allowable range of tilting of the support member 120 changes due to individual differences in the headrest support structure, and the range of the allowable range of the headrest 110 in the front-rear direction varies. Become. As a result, the vibration damping characteristics due to the dynamic damper vary.
- An object of the present invention is to provide a headrest support structure that can suppress variations in the attenuation characteristics of vibrations generated in a seat by suppressing variations in the range of swinging of the headrest in the front-rear direction relative to the seat back. It is in.
- the headrest support structure for solving the above problem is to support the headrest on the seat back so that the headrest can swing in the front-rear direction.
- the support structure includes a bracket provided on the seat back, a first spring and a second spring that elastically support the headrest stay protruding from the headrest with respect to the bracket at two different positions in the vertical direction of the seat, and the headrest A stopper portion that is displaced in the front-rear direction in accordance with the swinging of the headrest, and that restricts further swinging of the headrest when the headrest comes into contact with the bracket.
- the first spring is arranged farther from the stopper portion than the second spring in the vertical direction of the seat, and the rigidity of the first spring is higher than the rigidity of the second spring. Is also expensive.
- the bracket allows the headrest to swing in the front-rear direction within a range where the stopper portion does not contact the bracket.
- the headrest stay protruding from the headrest tilts with respect to the seat back around a predetermined tilt center.
- the range in which the headrest is allowed to swing in the front-rear direction is referred to as the “swing range”, and the range in which the headrest stay is allowed to tilt with respect to the seat back is referred to as the “tilt range”. To do.
- the first spring having higher rigidity than the second spring is provided at a position farther from the stopper portion than the second spring in the vertical direction of the seat.
- the widening range of the headrest relative to the amount of change varies.
- the ratio of the amount of change in height can be kept small. That is, the width of the swing range becomes difficult to change. Therefore, it is possible to suppress variations in the width of the swing range of the headrest, and it is possible to suppress variations in the attenuation characteristics of vibration generated in the seat.
- the headrest support structure may include a support member that has a cylindrical portion through which the headrest stay is inserted and supports the headrest stay that is inserted into the cylindrical portion.
- the stopper portion is provided on the support member, and the bracket is configured to elastically support the headrest stay through the support member.
- the first spring expands and contracts according to the displacement of the support member with respect to the bracket. Therefore, when the support member tilts together with the headrest stay, the first spring expands and contracts.
- the stopper portion may be provided at a position farther from the headrest than the springs in the seat vertical direction.
- the first spring having high rigidity is disposed near the headrest in the seat vertical direction
- the second spring having lower rigidity than the first spring is disposed away from the headrest in the seat vertical direction. It becomes. Therefore, the headrest stay tilts about a tilt center set closer to the headrest than the center between the two springs. According to this configuration, even if the initial position of the tip of the headrest stay is shifted forward or backward as compared to the case where both springs have the same rigidity, the width of the swing range of the headrest in the front-rear direction is increased. Hard to change.
- the “initial position of the tip of the headrest stay” is a position in the front-rear direction of the tip of the headrest stay when the headrest is not receiving force.
- the headrest support structure for solving the above-described problem is to support the headrest on the seat back so that the headrest can swing in the front-rear direction.
- the support structure includes a bracket provided on the seat back, a first spring and a second spring that elastically support the headrest stay protruding from the headrest with respect to the bracket at two different positions in the vertical direction of the seat, and the headrest A stopper portion that is displaced in the front-rear direction in accordance with the swinging of the headrest, and that restricts further swinging of the headrest when the headrest comes into contact with the bracket.
- the support structure tilts the headrest stay around the tilt center with respect to the bracket in accordance with the swinging of the headrest in the front-rear direction, and the tilt center is moved in the vertical direction of the seat by the first and second springs. It is comprised so that it may set in the position far away from the stopper part compared with the center in between.
- the tilt center is set at a position that is relatively far away from the stopper portion in the vertical direction of the seat.
- the width of the swing range of the headrest is made equal, the headrest stay is increased by the amount that the stopper can be displaced in the front-rear direction compared to the case where both springs have the same rigidity.
- the tilt range is expanded. Therefore, even if the size of the tilting range changes due to errors in the size and shape of the various parts that make up the headrest stay and the headrest support structure, as well as assembly errors in the various parts, the widening range of the headrest relative to the amount of change varies.
- the ratio of the amount of change in height can be kept small. That is, the width of the swing range becomes difficult to change. Therefore, it is possible to suppress variations in the width of the swing range of the headrest, and it is possible to suppress variations in the attenuation characteristics of vibration generated in the seat.
- the disassembled perspective view which shows the headrest support structure of 1st Embodiment.
- Sectional drawing which shows the headrest support and the side part sectional structure of the periphery of the headrest support structure of 1st Embodiment.
- Sectional drawing which shows the headrest support when a headrest is displaced ahead of a sheet
- the graph which shows the relationship between the displacement of a headrest, and the load which the displacement requires.
- (A) is a schematic diagram showing a state where the headrest is displaced forward in the seat in the headrest support structure of the first embodiment
- (b) is a schematic diagram showing a state where the headrest is displaced forward in the seat in the headrest support structure of the comparative example.
- (A) is a schematic diagram showing a state in which the initial position of the tip of the headrest stay in the headrest support structure of the first embodiment is shifted to the rear of the seat, and (b) is the initial value of the tip of the headrest stay in the headrest support structure of the comparative example
- the schematic diagram which shows the state which the position shifted
- Sectional drawing which shows the headrest support and its side part sectional structure in the headrest support structure of 2nd Embodiment. Sectional drawing which shows the side rest structure of a headrest support and its periphery in the headrest support structure of another embodiment.
- Sectional drawing which shows the headrest support when a headrest displaces ahead of a sheet
- Sectional drawing which shows the headrest support and the side sectional structure of the periphery of the headrest support in the conventional headrest support structure.
- FIGS. 1-10 A first embodiment embodying a headrest support structure for a seat mounted on a vehicle will be described below with reference to FIGS.
- the side on which the head of a person seated on the seat is located with respect to the headrest is referred to as “front side”, and the opposite side is referred to as “rear side”.
- the direction in which the seat back and the headrest are arranged is referred to as a “seat vertical direction”.
- FIG. 1 shows a headrest support structure in which the headrest 20 is elastically supported by the seatback 10 of the seat.
- the headrest 20 includes a pair of headrest stays 21 having a rod shape. These headrest stays 21 are arranged side by side in the seat width direction, and have a tip portion 22 that protrudes from the headrest 20 toward the seatback 10.
- the headrest support structure includes a pair of support brackets 30 formed of a metal in a square cylinder shape and a pair of headrest supports 40 formed of a synthetic resin. Both support brackets 30 are arranged at intervals in the seat width direction, and are fixed to the upper part of the seat back frame 11 by welding or fusion.
- the headrest support 40 is supported by the support bracket 30 in a state where the headrest support 40 is inserted into the support bracket 30 from its upper opening.
- the headrest support 40 has a substantially bottomed cylindrical shape, and the tip portion 22 of the headrest stay 21 is inserted into the cylindrical portion 41 of the headrest support 40 from the upper opening 411.
- the headrest support 40 supports the headrest 20 through the distal end portion 22 of the headrest stay 21 inserted into the tubular portion 41. Therefore, in the headrest support structure of the present embodiment, the headrest support 40 functions as a “support member”.
- a gap SP is provided between the outer surface 42 of the tubular portion 41 of the headrest support 40 and the inner surface 31 of the support bracket 30 to allow the headrest support 40 to be displaced (tilted) in the front-rear direction of the seat. ing.
- a first bead 51 that fills a gap between the inner surface 31 of the support bracket 30 and the outer surface 42 of the tubular portion 41 of the headrest support 40 is provided on the lower front side of the headrest support 40.
- a second bead 52 that fills a gap between the inner side surface 31 of the support bracket 30 and the outer side surface 42 of the tubular portion 41 of the headrest support 40 is provided on the upper rear side of the headrest support 40.
- Each bead 51, 52 is formed of the same synthetic resin as the headrest support 40.
- the beads 51 and 52 may be formed integrally with the headrest support 40, or may be formed separately and later fixed to the headrest support 40 by bonding or the like.
- a first communication window 32 that communicates the inside and outside of the support bracket 30 is provided on the lower rear side of the support bracket 30 that is on the opposite side of the first bead 51 across the tip portion 22 of the headrest stay 21. Yes.
- a second communication window 33 that connects the inside and outside of the support bracket 30 is provided on the upper front side of the support bracket 30 on the opposite side of the second bead 52 across the tip portion 22 of the headrest stay 21. Yes.
- the headrest support 40 supports a lower spring 53 and an upper spring 54 that are arranged at different positions in the vertical direction of the seat.
- Each spring 53, 54 is a metal leaf spring.
- a lower end of the lower spring 53 is supported by a bottom wall 43 below the headrest support 40 having a substantially cylindrical shape, and the lower spring 53 extends obliquely upward and rearward from the bottom wall 43.
- a portion of the lower spring 53 that protrudes rearward from the first communication window 32 is in contact with the lower rear inner surface 31 of the support bracket 30.
- the lower spring 53 is configured to apply a biasing force in a direction to widen a gap between the outer surface 42 on the lower rear side of the tubular portion 41 of the headrest support 40 and the inner surface 31 on the lower rear side of the support bracket 30. 30.
- the lower spring 53 expands and contracts (elastically deforms) according to the size of the gap between the outer surface 42 on the lower rear side of the tubular portion 41 of the headrest support 40 and the inner surface 31 on the lower rear side of the support bracket 30. It is supposed to be.
- the upper spring 54 is a cantilever spring having a lower end as a fixed end and an upper end as a free end, and is disposed in the second communication window 33. A part of the upper spring 54 protrudes forward from the second communication window 33. A portion of the upper spring 54 protruding forward from the second communication window 33 is in contact with the inner front surface 31 on the upper front side of the support bracket 30.
- the upper spring 54 imparts an urging force to the support bracket 30 in the direction of widening the gap between the upper front side outer surface 42 of the tubular portion 41 of the headrest support 40 and the upper front side inner surface 31 of the support bracket 30. is doing.
- the upper spring 54 expands and contracts (elastically deforms) according to the width of the gap between the upper front side outer surface 42 of the tubular portion 41 of the headrest support 40 and the upper front side inner surface 31 of the support bracket 30. It has become.
- both springs 53 and 54 function as a dynamic damper spring system
- the headrest 20 functions as a dynamic damper mass system.
- the rigidity of the upper spring 54 is higher than the rigidity of the lower spring 53, and the upper spring 54 corresponds to a “first spring”, and The spring 53 corresponds to a “second spring”. Therefore, the tilting center A of the headrest stay 21 with respect to the support bracket 30 is a center position B between the upper spring 54 and the lower spring 53 in the vertical direction of the seat (in other words, a position where the upper spring 54 contacts the support bracket 30).
- the lower spring 53 is positioned above the seat with respect to the center position B) between the lower spring 53 and the position where the lower spring 53 contacts the support bracket 30. Therefore, the length La from the position where the upper spring 54 is in contact with the headrest stay 21 to the tilt center A is longer than the length Lb from the position where the lower spring 53 is in contact with the headrest support 40 to the tilt center A. Is also shortened.
- the headrest support 40 that supports the headrest stay 21 also tilts as the headrest stay 21 tilts.
- the headrest stay 21 tilts so that the headrest 20 is displaced forward of the seat the upper end of the headrest support 40 moves forward of the seat and the lower end of the headrest support 40 moves backward of the seat.
- the headrest stay 21 tilts so that the headrest 20 is displaced rearward the upper end of the headrest support 40 moves rearward of the seat and the lower end of the headrest support 40 moves forward of the seat.
- further displacement of the headrest support 40 that is, further displacement of the headrest 20 toward the front of the seat is regulated by the contact between the stopper portion 55 and the support bracket 30.
- a position in the front-rear direction of the headrest 20 when no force is transmitted to the headrest 20 is defined as an “initial position”, and a position in the front-rear direction of the headrest 20 when the stopper portion 55 is in contact with the support bracket 30 is defined as a “maximum displacement position”.
- the range from the initial position of the headrest 20 to the maximum displacement position is the “oscillation range of the headrest 20”.
- the portion of the headrest support 40 or the headrest stay 21 that contacts the support bracket 30 functions as the stopper portion 55.
- the upper spring 54 is arranged farther from the stopper portion 55 in the vertical direction of the seat than the lower spring 53. In other words, the position at which the upper spring 54 contacts the support bracket 30 is farther from the stopper portion 55 in the seat vertical direction than the position at which the lower spring 53 contacts the support bracket 30.
- the operation of the headrest support structure of the present embodiment will be described with reference to FIG.
- the headrest 20 is displaced forward of the seat, the headrest stay 21 is tilted accordingly.
- the support bracket 30 that supports the tip portion 22 of the headrest stay 21 tilts with respect to the support bracket 30 together with the headrest stay 21. Therefore, the upper spring 54 and the lower spring 53 apply a biasing force that acts on the headrest support 40 in a direction opposite to the tilting direction.
- the upper spring 54 and the lower spring 53 arranged at different positions in the vertical direction of the seat expand and contract (elastically deform), so that the headrest stay 21 is centered between the springs 53 and 54 in the longitudinal direction of the seat. It tilts with respect to the support bracket 30 about the tilt center A above the seat from the position B.
- the stopper portion 55 contacts the inner side surface 31 on the lower rear side of the support bracket 30 and beyond.
- the tilting of the headrest stay 21 is regulated. Therefore, further displacement of the headrest 20 toward the front of the seat is performed by elastic deformation of the headrest stay 21 and the like.
- the headrest 20 when the headrest 20 is displaced rearward from the initial position, the first bead 51 comes into contact with the inner surface 31 on the lower front side of the support bracket 30 and the inner side on the upper rear side of the support bracket 30.
- the tilt of the headrest support 40 with respect to the support bracket 30 is restricted from the beginning by the contact of the second bead 52 with the side surface 31. Therefore, the displacement of the headrest 20 to the rear of the seat is performed from the beginning by elastic deformation of the headrest stay 21 and the like.
- the relationship between the amount of displacement of the headrest 20 in the longitudinal direction of the seat and the load necessary for the displacement is as shown in FIG. That is, as shown in FIG. 4, the support rigidity of the headrest 20 is from the position where the amount of displacement is “0 (zero)”, that is, from the initial position P0 of the headrest 20 when no external force is received to the front of the seat. An area to be reduced is set. However, the support rigidity of the headrest 20 increases with respect to the displacement forward of the seat after reaching the maximum displacement position P1 and the displacement backward from the initial position P0.
- the headrest 20 swings (vibrates) in the front-rear direction of the seatback frame 11 within a range in which the stopper portion 55 does not contact the inner surface 31 of the support bracket 30. Is allowed. Therefore, when the vibration force is transmitted from the vehicle body to the seat and the vibration in the front-rear direction caused by the vibration force is generated in the seat, the headrest 20 swings in the front-rear direction within the swing range. Thus, the vibration of the seat is attenuated.
- the headrest 20 shows a high support rigidity with respect to the rearward displacement of the seat, the headrest 20 can reliably catch the head of the occupant seated on the seat when the vehicle receives a rear-end collision.
- FIGS. 5A and 6A show a simplified model of the headrest support structure of the present embodiment in which the rigidity of the upper spring 54 is higher than the rigidity of the lower spring 53
- FIG. 5B and FIG. 6 (b) shows a simplified model of a headrest support structure of a comparative example in which the rigidity of the upper spring is equal to the rigidity of the lower spring.
- the tilt center A of the headrest stay 21 is The seat is located above the center position B between the springs 53 and 54.
- the rigidity of the upper spring 54 is equal to the rigidity of the lower spring 53. It almost coincides with the center position B between the two springs 53, 54 in the vertical direction.
- the length L1 from the headrest 20 to the tilt center A is shorter than that of the headrest support structure of the comparative example.
- the length L2 from the tilt center A to the tip 23 of the headrest stay 21 is longer than that of the headrest support structure of the comparative example.
- the headrest support structure of the present embodiment has a distal end 23 of the headrest stay 21 as compared with the support structure of the comparative example.
- the headrest support 40 and the support bracket 30 are designed in size and shape so that they can be greatly displaced rearward of the seat.
- the size and shape of various components such as the headrest support 40, the support bracket 30, and the headrest stay 21 that constitute the headrest support structure vary somewhat within a tolerance. Also, when assembling the above-described various parts to produce a sheet, some assembling errors may occur.
- the headrest is in a state in which the initial position of the tip 23 of the headrest stay 21 is shifted by a predetermined amount ⁇ M1 rearward of the seat due to the above-described error or the like. 20 is supported by the headrest support structure.
- the “initial position of the tip 23 of the headrest stay 21” refers to the position of the tip 23 of the headrest stay 21 in the longitudinal direction of the seat when no force is applied to the headrest 20 from the outside.
- the initial position of the headrest 20 is shifted by a displacement amount ⁇ M2 forward of the seat. This displacement amount ⁇ M2 is as shown in the following relational expression (formula 1).
- ⁇ M2 ⁇ M1 ⁇ (L1 / L2) (Formula 1)
- the positional deviation of the front end 23 of the headrest stay 21 in the front-rear direction of the seat gives the width H of the swing range of the headrest 20 in the front-rear direction. The influence can be made smaller.
- the rigidity of the upper spring 54 that is disposed relatively far from the stopper portion 55 in the seat vertical direction is lower than that of the upper spring 54 that is disposed near the stopper portion 55 in the seat vertical direction.
- the rigidity of the spring 53 is set higher.
- the tilt center A is set at a position farther away from the stopper portion 55 than in the case where the rigidity of the springs 53 and 54 is approximately the same.
- first communication windows 32A for communicating the inside and outside of the headrest support 40 are provided.
- the lower spring 53A supported by the bottom wall 43 of the headrest support 40 having a substantially cylindrical shape includes a first urging portion 531 extending obliquely upward and rearward from the bottom wall 43, and a first biasing portion 531 extending obliquely upward and forward from the bottom wall 43. 2 urging portions 532.
- the rigidity of the first urging portion 531 and the rigidity of the second urging portion 532 are equivalent.
- the first urging portion 531 is located in the first communication window 32A provided on the lower rear side of the support bracket 30, and the first urging portion 531 has a first communication portion.
- a portion protruding rearward from the window 32 ⁇ / b> A is in contact with the inner side surface 31 on the lower rear side of the support bracket 30.
- the first biasing portion 531 is a biasing force in the direction of widening the gap between the lower rear outer surface 42 of the tubular portion 41 of the headrest support 40 and the lower rear inner surface 31 of the support bracket 30. Is attached to the support bracket 30.
- the first urging portion 532 includes the first urging portion 532.
- a portion protruding from the communication window 32 ⁇ / b> A forward of the seat is in contact with the inner side surface 31 on the lower front side of the support bracket 30.
- the second urging portion 532 supports the urging force in the direction of widening the gap between the lower front side outer surface 42 of the tubular portion 41 of the headrest support 40 and the lower front side inner surface 31 of the support bracket 30. It is given to the bracket 30.
- second communication windows 33A for connecting the inside and the outside of the support bracket 30 are provided.
- an upper spring 54A for urging the tip portion 22 of the headrest stay 21 is provided, and a part of the upper spring 54A protrudes outward from the second communication window 33A.
- a portion of the upper spring 54 ⁇ / b> A that protrudes outward from the second communication window 33 ⁇ / b> A is in contact with the inner surface 31 of the support bracket 30.
- the upper spring 54 ⁇ / b> A located in front of the seat is in contact with the inner front surface 31 of the upper front side of the support bracket 30, and the upper front side outer surface 42 of the tubular portion 41 of the headrest support 40 and the upper front side of the support bracket 30.
- the support bracket 30 is applied with an urging force in a direction that widens the gap with the inner surface 31 of the support bracket 30.
- the upper spring 54 ⁇ / b> A located at the rear of the seat is in contact with the inner side surface 31 on the upper rear side of the support bracket 30, and the upper rear side surface 42 of the cylindrical portion 41 of the headrest support 40 and the support bracket 30.
- a biasing force is applied to the support bracket 30 in a direction that widens the gap with the inner side surface 31 on the upper rear side.
- the rigidity of the upper spring 54A located in front of the seat is equal to the rigidity of the upper spring 54A located in the rear of the seat.
- each upper spring 54A corresponds to a “first spring”
- the lower spring 53A including the first and second urging portions 531 and 532 includes a “first spring”. It corresponds to "2 springs”.
- the stopper portion 55 provided on the lower rear side of the headrest support 40 is provided at the lower portion of the support bracket 30. It contacts the rear inner surface 31. As a result, further displacement of the headrest 20 forward of the seat is restricted. Conversely, when the headrest stay 21 and the headrest support 40 tilt so that the headrest 20 is displaced rearward of the seat, the stopper portion 55 provided on the lower front side of the headrest support 40 is provided on the inner front surface of the lower front side of the support bracket 30. 31 abuts. Thereby, the further displacement to the back of the seat of headrest 20 is controlled.
- the position is the “swing range of the headrest 20”.
- the vibration frequency that can be damped by setting the rigidity of the springs 53A and 54A appropriately is the same as that of the headrest support structure of the first embodiment.
- the rigidity of each of the first and second biasing portions 531 and 532 is set to about half of the rigidity of the lower spring 53 of the first embodiment
- the rigidity of each upper spring 54A is set to the rigidity of the first embodiment. It is preferable that the upper spring 54 be about half the rigidity.
- the tilt center A can be set above the seat with respect to the center between the lower springs 53 and 53A and the upper springs 54 and 54A, the lower springs 53 and 53A and The rigidity of the upper springs 54 and 54A may be changed as appropriate.
- the headrest support structure may be configured to restrict the headrest 20 from swinging in the front-rear direction at the top of the headrest support 40. That is, as shown in FIGS. 8 and 9, a stopper portion 55A is provided on the front upper side of the headrest support 40, and the rigidity of the upper spring 54B disposed near the stopper portion 55A is disposed away from the stopper portion 55A. It may be made lower than the rigidity of the lower spring 53B.
- the tilt center A of the headrest stay 21 is set to a position farther from the stopper portion 55A, that is, a position farther from the headrest 20 than the center position B between the springs 53B and 54B. be able to. Therefore, an effect equivalent to that of each of the above embodiments can be obtained.
- the lower spring 53B corresponds to a “first spring”
- the upper spring 54B corresponds to a “second spring”.
- the spring may be a spring other than a metal leaf spring as long as it is configured to expand and contract (elastically deform) with respect to the tilt of the headrest stay 21.
- the spring may be a spring configured by bending a part of the headrest support 40, or may be a coil spring.
- the headrest stay 21 protrudes from the headrest 20
- the headrest stay 21 is not limited to a rod shape, and may be an arbitrary shape such as a rectangular plate shape.
- the number of headrest stays 21 protruding from the headrest 20 may be any number other than two (for example, one or three) as long as the headrest 20 can be attached to the seat back 10.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
以下、車両に搭載されるシートのヘッドレスト支持構造を具体化した第1の実施形態を図1~図6に従って説明する。なお、本実施形態では、ヘッドレストに対してシートに着座した人の頭部が位置する側を「前側」とし、その逆側を「後側」とする。また、シートバックとヘッドレストとが並ぶ方向を「シート上下方向」というものとする。
ヘッドレスト20がシート前方に変位すると、これに合わせてヘッドレストステー21が傾動する。すると、ヘッドレストステー21の先端部分22を支持するサポートブラケット30が、ヘッドレストステー21とともに、サポートブラケット30に対して傾動する。そのため、上側バネ54及び下側バネ53は、ヘッドレストサポート40に対して、その傾動方向とは反対方向に作用する付勢力を付与する。
すなわち、図4に示すように、変位量が「0(零)」となる位置、すなわち外力を受けていないときのヘッドレスト20の初期位置P0からシート前方に対しては、ヘッドレスト20の支持剛性が小さくなる領域が設定されている。ただし、最大変位位置P1に達した以降におけるシート前方への変位、及び初期位置P0からシート後方への変位に対しては、ヘッドレスト20の支持剛性が大きくなる。つまり、本実施形態のヘッドレスト支持構造を備えるシートでは、ストッパ部55がサポートブラケット30の内側面31に当接しない範囲で、シートバックフレーム11に対するヘッドレスト20のシート前後方向への揺動(振動)が許容されている。そのため、車体からシートに加振力が伝達されて、この加振力に起因する前後方向への振動がシートで発生する際には、揺動範囲内でヘッドレスト20が前後方向に揺動することにより、シートの振動が減衰される。
本実施形態のヘッドレスト支持構造では、比較例の支持構造と比較して、ヘッドレスト20から傾動中心Aまでの長さL1が短く、上記傾動中心Aからヘッドレストステー21の先端23までの長さL2が長い。そのため、ヘッドレスト20の変位量ΔM2は、比較例の支持構造の場合よりも少なくなる。したがって、設計上のヘッドレスト20のシート前後方向における揺動範囲の広さを「Hb」としたとき、本実施形態のヘッドレスト支持構造における実際の揺動範囲の広さH(=Hb-ΔM2)は、比較例の支持構造の場合よりも広くなる。すなわち、上記傾動中心Aをストッパ部55から遠ざけてヘッドレスト20に近づけることにより、ヘッドレストステー21の先端23のシート前後方向における位置ずれがヘッドレスト20の前後方向への揺動範囲の広さHに与える影響を、より小さくすることができる。
(1)本実施形態のヘッドレスト支持構造では、シート上下方向においてストッパ部55から比較的大きく離れて配置される上側バネ54の剛性を、シート上下方向においてストッパ部55の近くに配置される下側バネ53の剛性よりも高くしている。これにより、両バネ53,54の剛性が同程度である場合と比較して、上記傾動中心Aがストッパ部55からより大きく離れた位置に設定されることとなる。これにより、ヘッドレストステー21の先端23の初期位置が変わったとしてもヘッドレスト20の揺動範囲の広さHが変化しにくくなる。したがって、ヘッドレスト20の揺動範囲の広さHのばらつきを抑えることができ、シートに発生する振動の減衰特性のばらつきを抑えることができる。
次に、第2の実施形態のヘッドレスト支持構造について図7に従って説明する。以下の説明においては、第1の実施形態のヘッドレスト支持構造と相違する部分について主に説明するものとし、第1の実施形態のヘッドレスト支持構造と同一の構成要素には同一符号を付して重複説明を省略するものとする。
なお、上記各実施形態は以下のような別の実施形態に変更してもよい。
・ヘッドレスト20から突出するヘッドレストステー21の数は、ヘッドレスト20をシートバック10に取り付けることができるのであれば、2つ以外の任意数(例えば、1つや3つ)であってもよい。
Claims (4)
- ヘッドレストを前後方向に揺動可能なようにシートバックに支持させるヘッドレスト支持構造であって、
前記シートバックに設けられるブラケットと、
シート上下方向における互いに異なる2つの位置において、前記ヘッドレストから突出するヘッドレストステーを前記ブラケットに対して弾性支持する第1のバネ及び第2のバネと、
前記ヘッドレストの揺動に合わせて前後方向に変位するストッパ部であって、前記ブラケットに当接したときに同ヘッドレストのさらなる揺動を規制するストッパ部と、を備え、
前記第1のバネは、シート上下方向において、前記第2のバネと比較して前記ストッパ部からより大きく離れて配置され、
前記第1のバネの剛性は、前記第2のバネの剛性よりも高い
ヘッドレスト支持構造。 - 内部に前記ヘッドレストステーが挿通される筒状部を有し、同筒状部内に挿通されている同ヘッドレストステーを支持する支持部材を備え、
前記ストッパ部は前記支持部材に設けられ、前記ブラケットは前記支持部材を通じて前記ヘッドレストステーを弾性支持するように構成され、
前記第1のバネは、前記支持部材の前記ブラケットに対する変位に応じて伸縮する
請求項1に記載のヘッドレスト支持構造。 - 前記ストッパ部は、シート上下方向において、前記各バネと比較して前記ヘッドレストからより大きく離れた位置に設けられている
請求項1又は請求項2に記載のヘッドレスト支持構造。 - ヘッドレストを前後方向に揺動可能なようにシートバックに支持させるヘッドレスト支持構造であって、
前記シートバックに設けられるブラケットと、
シート上下方向における互いに異なる2つの位置において、前記ヘッドレストから突出するヘッドレストステーを前記ブラケットに対して弾性支持する第1のバネ及び第2のバネと、
前記ヘッドレストの揺動に合わせて前後方向に変位するストッパ部であって、前記ブラケットに当接したときに同ヘッドレストのさらなる揺動を規制するストッパ部と、を備え、
前記ヘッドレスト支持構造は、前記ヘッドレストの前後方向への揺動に合わせて前記ヘッドレストステーを前記ブラケットに対して傾動中心の周りで傾動させるとともに、同傾動中心をシート上下方向において前記第1及び第2のバネの間の中心と比較して前記ストッパ部からより大きく離れた位置に設定するように構成される
ヘッドレスト支持構造。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480024868.3A CN105163979B (zh) | 2013-05-08 | 2014-04-08 | 头枕支承构造 |
EP14794743.6A EP2995499B1 (en) | 2013-05-08 | 2014-04-08 | Headrest supporting structure |
JP2015515824A JP6041048B2 (ja) | 2013-05-08 | 2014-04-08 | ヘッドレスト支持構造 |
US14/787,557 US9884573B2 (en) | 2013-05-08 | 2014-04-08 | Headrest supporting structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013098514 | 2013-05-08 | ||
JP2013-098514 | 2013-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014181628A1 true WO2014181628A1 (ja) | 2014-11-13 |
Family
ID=51867110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/060219 WO2014181628A1 (ja) | 2013-05-08 | 2014-04-08 | ヘッドレスト支持構造 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9884573B2 (ja) |
EP (1) | EP2995499B1 (ja) |
JP (1) | JP6041048B2 (ja) |
CN (1) | CN105163979B (ja) |
WO (1) | WO2014181628A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11890359B2 (en) | 2016-09-20 | 2024-02-06 | Kuraray Noritake Dental Inc. | Zirconia composition, partially sintered material and sintered material and methods for production thereof, and laminate |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10099590B2 (en) * | 2012-07-02 | 2018-10-16 | Toyota Jidosha Kabushiki Kaisha | Headrest support structure |
WO2014181628A1 (ja) * | 2013-05-08 | 2014-11-13 | トヨタ自動車 株式会社 | ヘッドレスト支持構造 |
JP6513967B2 (ja) * | 2015-02-26 | 2019-05-15 | 日本発條株式会社 | ヘッドレスト装置 |
CN112428901A (zh) * | 2020-11-09 | 2021-03-02 | 浙江零跑科技有限公司 | 高度可自动调节的座椅头枕 |
US11273746B1 (en) * | 2021-03-17 | 2022-03-15 | GM Global Technology Operations LLC | Automotive seat headrest support |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61149552U (ja) | 1985-03-08 | 1986-09-16 | ||
JPS6439050U (ja) * | 1987-09-04 | 1989-03-08 | ||
WO2010150372A1 (ja) * | 2009-06-24 | 2010-12-29 | トヨタ自動車株式会社 | 車両用シート |
JP2012218458A (ja) * | 2011-04-04 | 2012-11-12 | Toyota Motor Corp | 自動車用ヘッドレスト支持装置 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5080437A (en) * | 1990-12-17 | 1992-01-14 | Chrysler Corporation | Self-adjusting headrest guide arrangement |
JPH07241221A (ja) * | 1994-03-04 | 1995-09-19 | Tachi S Co Ltd | ヘッドレストの上下調節装置 |
JP3758275B2 (ja) * | 1997-02-25 | 2006-03-22 | アイシン精機株式会社 | 車両用ヘッドレスト装置 |
JP2001037576A (ja) * | 1999-07-29 | 2001-02-13 | Aisin Seiki Co Ltd | ヘッドレスト装置 |
DE10312517B4 (de) * | 2003-03-20 | 2012-01-19 | Johnson Controls Gmbh | Arretiervorrichtung und Kopfstütze |
FR2881089B1 (fr) * | 2005-01-26 | 2008-08-29 | Itw De France Sas | Gaine de reception d'une d'appui-tete |
EP2119603B1 (en) * | 2006-12-27 | 2012-02-15 | NHK Spring Co., Ltd. | Headrest tilting device for active headrest |
US7931331B2 (en) * | 2009-03-26 | 2011-04-26 | Faurecia Automotive Seating, Inc. | Headrest with energy dissipater for rear passenger |
JP2011207335A (ja) | 2010-03-30 | 2011-10-20 | Ts Tech Co Ltd | 車両用シート |
US8814271B2 (en) * | 2010-08-05 | 2014-08-26 | Toyota Jidosha Kabushiki Kaisha | Vehicle seat |
JP5720510B2 (ja) * | 2011-09-20 | 2015-05-20 | トヨタ自動車株式会社 | 車両用シート |
JP2014008335A (ja) * | 2012-07-02 | 2014-01-20 | Toyota Motor Corp | ヘッドレスト支持構造 |
WO2014181628A1 (ja) * | 2013-05-08 | 2014-11-13 | トヨタ自動車 株式会社 | ヘッドレスト支持構造 |
JP5814310B2 (ja) * | 2013-07-19 | 2015-11-17 | トヨタ自動車株式会社 | ヘッドレスト支持構造 |
JP6196184B2 (ja) * | 2014-04-25 | 2017-09-13 | トヨタ紡織株式会社 | 乗物用シートのヘッドレストの組み付け構造 |
-
2014
- 2014-04-08 WO PCT/JP2014/060219 patent/WO2014181628A1/ja active Application Filing
- 2014-04-08 JP JP2015515824A patent/JP6041048B2/ja not_active Expired - Fee Related
- 2014-04-08 US US14/787,557 patent/US9884573B2/en not_active Expired - Fee Related
- 2014-04-08 CN CN201480024868.3A patent/CN105163979B/zh not_active Expired - Fee Related
- 2014-04-08 EP EP14794743.6A patent/EP2995499B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61149552U (ja) | 1985-03-08 | 1986-09-16 | ||
JPS6439050U (ja) * | 1987-09-04 | 1989-03-08 | ||
WO2010150372A1 (ja) * | 2009-06-24 | 2010-12-29 | トヨタ自動車株式会社 | 車両用シート |
JP2012218458A (ja) * | 2011-04-04 | 2012-11-12 | Toyota Motor Corp | 自動車用ヘッドレスト支持装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11890359B2 (en) | 2016-09-20 | 2024-02-06 | Kuraray Noritake Dental Inc. | Zirconia composition, partially sintered material and sintered material and methods for production thereof, and laminate |
Also Published As
Publication number | Publication date |
---|---|
EP2995499B1 (en) | 2019-10-02 |
US9884573B2 (en) | 2018-02-06 |
JP6041048B2 (ja) | 2016-12-07 |
JPWO2014181628A1 (ja) | 2017-02-23 |
EP2995499A4 (en) | 2016-05-18 |
EP2995499A1 (en) | 2016-03-16 |
CN105163979A (zh) | 2015-12-16 |
US20160082869A1 (en) | 2016-03-24 |
CN105163979B (zh) | 2017-06-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6041048B2 (ja) | ヘッドレスト支持構造 | |
JP5056945B2 (ja) | 車両用シート | |
WO2014007203A1 (ja) | ヘッドレスト支持構造 | |
JP5440705B2 (ja) | 車両用シート | |
JP6190651B2 (ja) | 防振装置 | |
KR101743660B1 (ko) | 헤드레스트 지지 구조 | |
WO2014007201A1 (ja) | ヘッドレスト支持構造 | |
KR101591728B1 (ko) | 헤드레스트 지지 구조 | |
JP5692205B2 (ja) | ヘッドレスト支持構造 | |
JP2017047748A (ja) | 車両前部構造 | |
JP7369923B2 (ja) | ダイナミックダンパ、ヘッドレスト及び乗物用シート | |
JP5051702B2 (ja) | キャブマウント構造 | |
JP5696649B2 (ja) | ヘッドレスト及び車両用シート | |
JP4543318B2 (ja) | ダイナミックダンパ | |
JP2014031048A (ja) | ヘッドレスト支持構造 | |
JP2014046907A (ja) | ヘッドレスト支持構造 | |
JP2011255797A (ja) | フロント用ダブルウィッシュボーンサスペンション | |
JP2008202668A (ja) | 防振装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480024868.3 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14794743 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14787557 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2015515824 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014794743 Country of ref document: EP |