JP2007118775A - Headrest device and seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest device and a vehicle seat capable of enhancing the supporting performance by suppressing dislocation of the occupant head to the left or right when the vehicle goes in collision. <P>SOLUTION: The invention comprises a headrest body part 4, two front face portions 6Ra and 6La provided on the front face of the headrest body part 4 and having the whole configuration such that two ends can be deformed about approximately the central part in the left-right direction as the inflection point in such a way as bending toward the occupant head 5, and a spring member 7 to bend the front face portions 6Ra and 6La and an ignitor 8. During normal operation, the whole configuration of the front face portions 6Ra and 6La is made approximately plane without making a flexural deformation to generate a headrest shape to give a normal sense of use, and when the vehicle goes in collision, flexural deformation is made while approximately the central part in the left-right direction of the front face portions 6Ra and 6La serves as the inflection point. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a headrest device provided on a seat of a vehicle, and more particularly to a headrest device that supports a rear surface of an occupant's head at the time of a vehicle collision and a seat having the same.

  In general, when a vehicle such as an automobile is driven in a normal posture, the head of the occupant and the headrest are separated from each other. At this time, for example, when a rear collision or the like is received from the vehicle direction, the head of the occupant moves so as to largely warp backward due to inertial force.

In order to suppress such rearward movement, an active headrest system that actively supports the head of an occupant has been proposed (see, for example, Patent Document 1).
JP 2005-066091 A

  In the above prior art, the back of the occupant who moves backward together with the occupant's head in the event of a collision is received by the seat back of the seat seat, and the headrest provided at the upper part of the seat back is interlocked with the link mechanism provided therein. A basic configuration of a headrest device that moves forward and actively supports the head of an occupant is disclosed.

  In order to optimize the headrest device, a configuration that can sufficiently receive and support the headrest of the occupant is required even when the head of the occupant is displaced from the center position of the headrest to the left and right.

  An object of the present invention is to provide a headrest device and a seat that can obtain good support performance at the time of a vehicle collision even when the head of an occupant is displaced from side to side.

  In order to achieve the above object, a first invention is a headrest device provided in a seat, which is provided in a headrest main body and the headrest main body, and is deformed during operation to change the occupant's rear head or left and right sides. It has a restraint member which restrains at least any one of a part, and an operation means which carries out deformation operation of this restraint member, It is characterized by the above-mentioned.

  As a result, even if the occupant's head is displaced left and right at the time of a vehicle collision, the occupant's rear head and left and right side portions are restrained and held by centering the left and right positions by deforming the restraint member. It is possible to suppress the deviation and obtain good support performance.

  A second invention is characterized in that, in the first invention, there is provided an operation control means for controlling an operation timing of the operation means.

  As a result, the restraint member can be deformed by automatically actuating the actuating means at a predetermined timing regardless of the manual operation of the occupant, so that the occupant's head can be supported by centering.

  According to a third invention, in the first or second invention described above, there is provided a collision prediction sensor capable of predicting and detecting at least one of a rear collision and a side collision before the collision, and the operation control means includes the collision The actuating means is actuated before a collision of the vehicle according to a detection result of a prediction sensor.

  As a result, the operation control means can start the operation of the operation means before the collision of the vehicle based on the detection result of the collision prediction sensor, and the restraining member can be deformed with a margin before being supported by the head.

  According to a fourth aspect of the present invention, the restraining member is a bent portion that is provided in the headrest main body so as to face a head of an occupant seated on the seat seat, and an end portion thereof can be bent toward the head of the occupant. The actuating means is a bending actuating means that bends and deforms the bent portion.

  As a result, during normal driving, the headrest can be shaped so that a normal feeling of use can be obtained by aligning the direction without bending the bent part, while the head of the passenger is Even if it is shifted to the left or right, the bending portion is bent and deformed by the bending operation means to hold the occupant's head and center the left and right positions, thereby suppressing the above left and right shifts and obtaining good support performance. Can do.

  In a fifth aspect based on the fourth aspect, the bent portion is pivotally supported on the hinge provided on the headrest main body portion and pivotally supported on the hinge as a bent point provided on the central portion in the left-right direction. Two turning support portions, and the bending actuating means includes a biasing member that biases the two turning support portions from the headrest main body portion toward the head of the occupant, and the two When the bending portion is bent and deformed by having a penetrating pin penetrating the overlapping portion of the two rotating support portions so as to restrict the rotation of the rotating support portion, the through pin is pulled out from the overlapping portion and It has a rotation restricting means for canceling the restriction of the rotation of the two rotation support portions.

  Thus, during normal operation, the rotation restricting means allows the through pin to penetrate the overlapping portion, thereby maintaining the state in which the two rotation support portions are arranged on substantially the same plane, that is, without bending the bending portion. It can be substantially planar. On the other hand, the rotation restricting means pulls out the penetrating pin from the overlapping portion, whereby the two rotation support portions can be rotated by the urging force of the urging member, that is, the entire shape of the bent portion can be bent and deformed.

  According to a sixth invention, in any one of the above fourth inventions, the bent portion includes two rotation shafts each provided in a shaft arrangement on the headrest main body portion in parallel arrangement close to each other, and the 2 Two rotation support portions fixed to the two rotation shafts, respectively, and the bending operation means meshes with both the two gears fixed to the two rotation shafts and the two gears. A rack that engages with the rack, and a motor that drives the rack via the pinion.

  As a result, the motor drives the rack via the pinion to simultaneously rotate the two gears, and in conjunction with them, the two rotation shafts and the two rotation support portions can be rotated, that is, 2 The overall shape of the bent portion can be bent and deformed from a substantially planar shape with the intermediate position of the two rotation shafts as the bending point.

  According to a seventh aspect of the present invention, in any one of the fourth to sixth aspects of the present invention, two pivoting side surfaces that are rotatably provided toward the occupant's head at each end of the bent portion. And a side surface actuating means for rotating each of the two rotating side surface portions.

  As a result, during normal operation, the two pivoting side portions can be rotated and positioned behind the bent portions to form a headrest that provides a normal feeling of use, while the bent portions are bent. When deforming, the side surface actuating means is rotated so that the two rotating side surface portions are positioned forward of the bent portions, respectively, so that the occupant's head is sandwiched between the two rotating side surface portions. It is possible to improve the support performance by further suppressing the lateral displacement of the head.

  In order to achieve the above object, an eighth invention is a seat for seating an occupant, a seat portion for supporting the occupant from below, a backrest portion for supporting the occupant's back, and the backrest. The headrest device is provided at the top of the headrest, and the headrest device is provided on the headrest main body and the headrest main body. The headrest device is deformed during operation and restrains at least one of the occupant's rear head and left and right side portions. It is characterized by having a restraining member to be operated and an operating means for deforming the restraining member.

  As a result, even if the head of the occupant sitting on the seat and leaning back against the backrest is displaced to the left or right at the time of the collision of the vehicle, the restraint member is deformed to operate the occupant's rear head and left and right sides. By restraining and holding and centering the left and right positions, it is possible to suppress the above left and right shifts and to obtain good support performance.

  According to the present invention, it is possible to obtain good support performance even when the head of the occupant is displaced to the left or right with respect to the headrest during a vehicle collision.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a first embodiment of a headrest device according to the present invention will be described.

  FIG. 1 is a side sectional view showing an overall schematic structure of a seat having the headrest device of the present embodiment. Note that the headrest device of the present embodiment is applied to a seat seat that is installed in a passenger compartment of a vehicle (not shown) (this applies to the second embodiment described later). Further, the lower portion of the seat is omitted for the sake of simplicity, and the seat back of the seat and the headrest assembly are shown in a longitudinal sectional view.

  In FIG. 1, a seat 2 includes a seating portion (not shown) that supports the heel portion of the occupant H from below, a backrest portion (seatback) 3 that supports the back of the occupant H, and an upper portion of the seatback 3. The headrest device 1 is located.

  The headrest device 1 according to the present embodiment includes a headrest main body 4 provided at the upper end of the seat back 3 of the seat 2 and a headrest main body 4 facing the rear surface of the head 5 of the occupant H seated on the seat 2. The rotating wall portion 6 provided in the front surface and the boss hole 4a formed in the front surface of the headrest body portion 4 are accommodated in the rotating wall portion (restraining member) 6 toward the head 5 of the occupant H. A spring member (biasing member) 7 to be urged, an igniter (rotation restricting means) 8 installed on the rotating wall 6, and a signal that is electrically connected to the igniter 8 and controls the operation of the igniter 8. ECU (Engine Control Unit: operation control means) 9, and a rear collision prediction sensor 10 and a side collision prediction sensor 11 electrically connected to the ECU 9.

  The ECU 9 is a computer including a CPU, a RAM, a ROM, and the like, and performs control according to a program recorded in advance in the ROM. Although not specifically shown, the rear collision prediction sensor 10 is installed near the rear surface of the vehicle, the side collision prediction sensor 11 is installed near the vehicle side surface, and the rear collision prediction sensor 10 detects a collision on the rear surface of the vehicle. The prediction sensor 11 is a sensor that can detect and detect a collision on the side surface of the vehicle before the moment of the collision. It is sufficient to use a known collision prediction sensor. Note that a power source and a wireless receiver may be provided in the headrest main body 4 so that a control signal is transmitted and received between the ECU 9 and the igniter 8 by wireless communication.

  FIG. 2 is a perspective view showing the entire headrest main body 4 and the rotating wall 6 of the present embodiment. In FIG. 2, each main part is partially seen through and indicated by broken lines. First, the headrest body 4 is formed in a substantially rectangular parallelepiped shape, and its lower surface is a fixing member that is fixed to the seat back 3 of the seat 2 as shown in FIG.

  Two rotating wall portions 6R and 6L are provided side by side in the left-right direction of the headrest body portion 4, and front portions (bending portions and rotation support portions) 6Ra and 6La covering the front surface of the headrest body portion 4 and the headrest, respectively. The side surfaces 6Rb and 6Lb that cover the side surface of the main body 4 are integrally formed. These front surface portions 6Ra, 6La and side surface portions 6Rb, 6Lb are each formed in a substantially flat plate shape, and their outer surfaces are covered with an elastic resin material or the like so that they can flexibly come into contact with the head of the occupant. (Or an external shock absorbing material such as sponge may be provided and the outer surface may be covered with a cloth material).

  Further, front arms 6Ra and 6La of the respective rotating wall portions 6 are respectively provided with support arms (rotating support portions) 12Ru, 12Rd, 12Lu, and 12Ld at the upper and lower edges thereof. Two support arms (12Ru and 12Lu, 12Rd and 12Ld) adjacent to the hinges 13u and 13d respectively provided are pivotally supported so that they can be rotated. The two upper and lower hinges 13u, 13d are positioned on the same straight line passing through the headrest body 4 vertically, that is, the two rotating wall portions 6R, 6L are rotatable around a common rotation axis. . A link mechanism via an igniter 8 is provided between the pair of support arms 12Rd and 12Ld located on the lower side.

  FIG. 3 is a view showing a link mechanism provided between a pair of lower support arms 12Rd and 12Ld. FIG. 3A is an overall perspective view in which the igniter 8 is separated from the support arms 12Rd and 12Ld. FIG. 3B is a cross-sectional view of the link mechanism taken along the line IIIb-IIIb ′ in FIG. 3 (a) and 3 (b), a boss hole 12a is formed on the upper surface of the support arm 12Ld that overlaps the upper side, and the inner screw 14 formed on the inner surface of the support arm 12Ld has an igniter 8 The screw portion 8a can be screwed.

  The igniter 8 projects the through pin 15 from the lower surface in a normal state, and when the control signal is input from the ECU 9, the through pin 15 uses the driving force of the high-pressure gas generated inside the housing 8 b. Is operated to be pulled into the housing 8b.

  A through hole 16 through which the through pin 15 of the igniter 8 can pass is formed in the bottom surface of the boss hole 12a of the support arm 12Ld, and the same through hole 16 is also formed in the support arm 12Rd that overlaps thereunder. The igniter 8 is installed so as to penetrate through the two support arms 12Rd and 12Ld at the same time with the penetration pin 15. That is, the penetrating pin 15 of the igniter 8 passes through the overlapping portion (shaded area in the drawing) X of the two support arms 12Rd and 12Ld. In this state, the two support arms 12Rd and 12Ld are relatively fixed to each other. Will be. As shown in FIG. 2, in a state where these two support arms 12Rd and 12Ld are relatively fixed by passing through the through pin 15 in the overlapping portion X, the front surface portions 6Ra and 6La of the respective rotating wall portions 6R and 6L. Are maintained in the same direction (in the left front direction in FIG. 2).

  Next, the operation of this embodiment will be described.

  4A and 4B are views for explaining the operation of the headrest device 1 according to the present embodiment in the section taken along the line IV-IV 'in FIG. 2. FIG. 4A is a sectional view before the operation, and FIG. FIG.

  First, during normal operation, as described above, the through pin 15 of the igniter 8 passes through the two lower support arms 12Rd and 12Ld at the same time and relatively fixes them, so that FIG. As shown in FIG. 5, the front surface portions 6Ra and 6La of the two rotating wall portions 6R and 6L are maintained in a state where they are aligned in substantially the same direction (upward in FIG. 4A) in front of the headrest body portion 4.

  When the rear collision prediction sensor 10 or the side collision prediction sensor 11 predicts and detects at least one of the rear collision and the side collision of the vehicle, the ECU 9 immediately outputs a control signal to the igniter 8 based on the detection result, The pin 15 is pulled in to release the restriction on the rotation of the two support arms 12Rd and 12Ld. As a result, as shown in FIG. 4B, the relative fixing of the two support arms 12Rd and 12Ld is released, and thereafter the two rotating wall portions 6R and 6L are respectively urged by the spring member 7 (see FIG. 4B). It is rotated toward the head of the passenger by the middle arrow A) (arrow B in the figure). In this state, the entire shape (bent portion) formed by the two front surface portions 6Ra and 6La is bent and deformed with the hinges 13u and 13d as the bending points Y1 and both ends toward the head 5 of the occupant H.

  This bending deformation operation starts after the prediction of the collision (before the actual collision), and the pulling operation of the through pin 15 by the igniter 8 and the rotating operation of the rotating wall portions 6R and 6L by the spring member 7 are performed quickly. The head 5 of the occupant H moves rearward due to the actual collision, and the bending deformation operation can be completed before the front surface portions 6Ra and 6La contact and support it.

  Then, the head 5 of the occupant H (in this example, the occipital region, which may be at least one of the occipital region and the left and right side portions) is restrained and supported in a state where the overall shape of the two front surface portions 6Ra and 6La is bent and deformed. Thus, even when the head 5 is displaced from the center position of the headrest body 4 to the left and right, the two front surface portions 6Ra and 6La can be supported so as to guide the head 5 to the center position, that is, The position of the head 5 can be supported so as to be centered with respect to the width direction of the seat.

  In the above, the two front surface portions 6Ra and 6La are provided on the front surface of the headrest body portion 4 so as to face the head 5 of the occupant H seated on the seat 2, and the overall shape thereof is substantially the center in the left-right direction. A bending portion that can be deformed so as to bend both ends toward the head 5 of the occupant H is formed as the bending point Y1.

  Further, the two front surface portions 6Ra and 6La and the support arms 12Ru, 12Lu, 12Rd, and 12Ld constitute two rotation support portions that are pivotally supported by the hinges 13u and 13d. Further, the spring member 7 and the igniter 8 constitute a bending operation means for bending and deforming the entire shape of the two front surface portions 6Ra and 6La.

  As described above, the headrest device 1 according to the first embodiment can obtain a normal feeling of use by setting the entire shape of the two front surface portions 6Ra and 6La to be substantially aligned without bending deformation during normal operation. While the headrest can be shaped, on the other hand, when the vehicle collides, the overall shape of the two front surface portions 6Ra and 6La is bent and deformed with the substantially central portion in the left-right direction as a bending point Y1, thereby By easily centering the left and right positions, the right and left displacement of the head 5 of the occupant H can be suppressed, and good support performance can be obtained. In particular, the above effects are effective for application to an active headrest system that positively supports the head 5 by moving the headrest forward during a vehicle collision.

  Further, according to the headrest device 1 of the present embodiment, the ECU 9 automatically operates the igniter 8 at a predetermined timing to bend and deform the entire shape of the two front surface portions 6Ra and 6La regardless of the manual operation of the occupant H. Therefore, the head 5 of the occupant H can be supported by centering.

  Further, according to the headrest device 1 of the present embodiment, the ECU 9 can start the operation of the igniter 8 before the collision of the vehicle based on the detection results of the two collision prediction sensors 10 and 11, and the two front surface portions 6Ra and 6La. Thus, before the heads 5 are supported, their entire shapes can be bent and deformed with a margin.

  In the headrest device 1 of the present embodiment, the igniter 8 that is operated by the high-pressure gas generated inside is used as a member that pulls out the through pin 15 that has passed through the overlapping portion X of the two support arms 12Rd and 12Ld. The present invention is not limited to this. For example, if the pulling force of the penetrating pin 15 is sufficiently large, a solenoid that is an electrically actuated component can be used.

  Next, a second embodiment of the headrest device according to the present invention will be described.

  The headrest device 101 according to the second embodiment is different from the first embodiment in that the operation mechanism for bending and deforming the entire shape of the two front surface portions 6Ra and 6La is different, and each side surface portion has two each. It is different in that it is configured to rotate relative to the front surface portions 6Ra and 6La. Hereinafter, only these differences will be described, and in each drawing, members having the same configurations as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  FIG. 5 is a perspective view showing the entire headrest main body 4 and the rotating wall portion of the present embodiment, and corresponds to FIG. 2 in the first embodiment. In addition, in order to avoid the complexity of illustration, illustration of some members is abbreviate | omitted (refer these FIG. 6 mentioned later about these).

  In FIG. 5, two rotation shafts 21 </ b> R and 21 </ b> L are provided on the headrest main body 4 so as to penetrate the headrest main body 4 in the vertical direction in parallel arrangement close to each other. The support arms 12Ru, 12Lu, 12Rd, and 12Ld provided on the upper and lower edges of the two front surface portions 6Ra and 6La are fixed with the end portions of the rotation shafts 21R and 21L interposed therebetween. Accordingly, the front surface portions 6Ra and 6La can be rotated about the rotation shafts 21R and 21L, respectively. Further, gears 22R and 22L are fixed at the same axial position (same vertical position) of the respective rotating shafts 21R and 21L, and the two gears 22R and 22L are engaged with both gears 22R and 22L. A rack 23 is provided (see FIG. 6 described later for the rack 23).

  Side surfaces (rotating side surfaces) are installed on the outer ends of the front surfaces 6Ra and 6La via rotational drive shafts (side surface actuating means) 24R and 24L. These front surfaces 6Ra and 6La are rotationally driven. The shafts 24R and 24L and the side surface portions 26R and 26L constitute the rotating wall portions 6R and 6L. The two rotational drive shafts 24R and 24L have motors (not shown) inside, and relatively rotate the front surface portions 6Ra and 6La and the side surface portions 26R and 26L connected to each other by a control signal received from the ECU 9. It works to let you.

  FIG. 6 is a perspective view showing a link mechanism provided between the two rotation shafts 21R and 21L when viewed from an arrow VI in FIG. In addition, the tooth surfaces of the gears 22R and 22L and the rack 23 in the drawing are simplified by describing simple lines.

  In FIG. 6, the rack 23 is provided so as to be sandwiched between the two gears 22R and 22L as described above, and the tooth surfaces formed on both side surfaces of the rack 23 (in FIG. 6). (Which is also formed on the side surface on the left back side of the tooth surface that cannot be seen on the back side) meshes with the two gears 22R and 22L, respectively. The rack 23 is supported by a bracket (not shown) or the like, and can slide in the longitudinal direction (direction connecting the left front side and the right back side in FIG. 6).

  In addition, a motor 27 is fixedly provided inside the headrest body 4, and a pinion 28 fixed to the output rotation shaft meshes with one tooth surface of the rack 23. The motor 27 is rotationally controlled by a control signal received from the ECU 9. As a result, when the motor 27 rotates in response to a control signal from the ECU 9, the rotational driving force of the motor 27 can move the rack 23 in the longitudinal direction via the pinion 28, and in conjunction with the two, The gears 22R and 22L can be rotated in opposite directions. Further, while the rotation of the motor 27 is stopped, the two gears 22R and 22L can be fixedly stopped.

  Next, the operation of this embodiment will be described.

  FIG. 7 is a cross-sectional view taken along the line VII-VII ′ in FIG. 5 for explaining the operation of the headrest device 101 of this embodiment. FIG. 7A is a cross-sectional view before the operation, and FIG. FIG.

  First, during normal operation, the rotation of the motor 27 is stopped as described above, whereby the rotation of the two gears 22R, 22L and the rotation shafts 21R, 21L can be fixedly stopped. The front surface portions 6Ra and 6La of the rotating wall portions 6R and 6L are also maintained in a fixed state. At this time, as shown in FIG. 7A, the connection state of the link mechanisms is set so that the two front surface portions 6Ra and 6La are arranged on the substantially same plane in front of the headrest body portion 4.

  In addition, during the same normal operation, the rotation of the side surfaces 26R and 26L can be fixed and stopped by stopping the rotation of the rotation drive shafts 24R and 24L. At this time, as shown in FIG. 7A, each side surface portion 26R, 26L is disposed so as to cover the side surface of the headrest body portion 4 (at least a position behind the front surface portions 6Ra, 6La). The rotation states of 24R and 24L are set in advance.

  When the ECU 9 determines that at least one of the rear collision and the side collision has been predicted based on the detection result from the rear collision prediction sensor 10 or the side collision prediction sensor 11, it immediately outputs a control signal to the motor 27. As shown in FIG. 7B, the rack 23 is moved backward (arrow C in the figure), and the two gears 22R and 22L are rotated in the reverse rotation direction (arrow D in the figure). Thereby, the two front surface portions 6Ra and 6La are rotated toward the head 5 of the occupant H. In this state, the entire shape (bent portion) formed by the two front surface portions 6Ra and 6La is located at the bending point Y2 (see FIG. 5) between the two rotation shafts 21R and 21L, and both ends are positioned on the occupant H. It will be bent and deformed toward the head 5.

  On the other hand, simultaneously with this bending deformation, the two rotational drive shafts 24R and 24L are rotated so that the respective side surface portions 26R and 26L are positioned in front of the respective front surface portions 6Ra and 6La (arrow E in the figure). Thereby, as shown in FIG.7 (b), the passenger | crew's H head 5 can be arrange | positioned so that it may be pinched | interposed into right and left by two side surface parts 26R and 26L.

  In the above, the two front surface portions 6Ra and 6La and the support arms 12Ru, 12Lu, 12Rd and 12Ld constitute two rotation support portions fixed to the two rotation shafts 21R and 21L, respectively. Further, the two gears 22R and 22L, the rack 23, the pinion 28, and the motor 27 constitute a bending operation means that bends and deforms the entire shape of the two front surface portions 6Ra and 6La.

  As described above, also in the headrest device 101 of the second embodiment, as in the first embodiment, it is possible to suppress the shift of the left and right positions of the occupant's head and obtain good support performance.

  Further, according to the headrest device 101 of the present embodiment, during normal operation, the two side surface portions 26R and 26L are rotated and positioned behind the two front surface portions 6Ra and 6La, respectively, so that a normal feeling of use is obtained. While the headrest can be formed in the shape, the entire shape of the two front surface portions 6Ra and 6La is bent and deformed, and the two side surface portions 26R and 26L are respectively rotated by the rotary drive shafts 24R and 24L to the two front surface portions 6Ra and 6La. By rotating the head 5 of the occupant H so as to be positioned further forward, the right and left displacement of the head 5 is suppressed by arranging the head 5 of the occupant H so as to be sandwiched between the two side surfaces 26R and 26L. Can be improved. Further, even when a large lateral load is applied to the head 5 due to a side collision, the two side surface portions 26R and 26L can restrain the head 5 in the left-right direction. It can be improved.

  In the headrest device 101 of the present embodiment, a pressure sensor is provided on the front surface portions 6Ra and 6La that are in contact with and supported by the head 5 of the occupant H, and the ECU 9 has two front surface portions 6Ra and 6La based on the detection results of the pressure sensors. The magnitude of the bending deformation of the entire shape (the bending angle between the two front surface portions 6Ra and 6La) may be changed, and in this way, the impact applied to the head 5 is absorbed.

  In the above description, the rotating wall portion 6 is provided as a restraining member, and the rotating wall portion 6 is bent and deformed by the spring member 7 and the igniter 8 as operating means. However, the present invention is not limited thereto. . That is, as a restraining member, for example, an air bag formed in a substantially bag shape using an air bag base cloth is used, and a high pressure fluid (gas) generated from an inflator (gas generating means) as an operating means is applied to the air bag. It may be supplied and deformed (inflated and deployed), thereby restraining at least one of the occupant's rear head and left and right sides. In this case, the same effect is obtained.

  The specific configurations of the above-described embodiments and modifications do not strictly limit the contents of the present invention, and it is needless to say that details can be variously changed in accordance with the spirit of the present invention.

It is a sectional side view showing the whole schematic structure of the seat which provided the headrest device of a 1st embodiment by the present invention. It is a perspective view showing the whole headrest main-body part and the rotation wall part similarly. (A) is a whole perspective view showing a link mechanism provided between two lower support arm pairs, and (b) is a cross-sectional view of the link mechanism taken along the line IIIb-IIIb 'in (a). is there. 2A is a cross-sectional view taken along the line IV-IV ′ in FIG. 2 before operation, and FIG. 4B is a cross-sectional view after operation. It is a perspective view showing the whole headrest main-body part and rotation wall part by 2nd Embodiment of this invention. FIG. 6 is a perspective view showing a link mechanism provided between two rotation shafts as seen from the arrow VI in FIG. 5. FIG. 7A is a cross-sectional view taken along the line VII-VII ′ in FIG. 5 before operation, and FIG. 7B is a cross-sectional view after operation.

Explanation of symbols

1 Headrest device 2 Seat seat 3 Seat back (backrest)
4 Headrest body portion 5 Head portion 6R, 6L Rotating wall portion 6Ra, 6La Front surface portion (bending portion, rotating support portion)
6Rb, 6Lb Side face part 7 Spring member (biasing member)
8 Igniter (turning restricting means)
9 ECU (operation control means)
10 Rear collision prediction sensor 11 Side collision prediction sensor 12Ru, 12Lu Support arm (rotation support portion)
12Rd, 12Ld
13u, 13d Hinges 15 Through-pins 21R, 21L Rotating shafts 22R, 22L Gears 23 Racks 24R, 24L Rotating drive shafts (side surface actuating means)
26R, 26L Side (rotating side)
27 Motor 28 Pinion 101 Headrest device H Crew X Overlapping part Y1, Y2 Bending point

Claims (8)

A headrest device provided in a seat,
A headrest body,
A restraining member that is provided in the headrest main body, and that is deformed during operation and restrains at least one of the occupant's rear head or left and right sides; and
An operating means for deforming the restraining member;
A headrest device characterized by comprising:   The headrest device according to claim 1, further comprising an operation control unit that controls an operation timing of the operation unit. A collision prediction sensor capable of predicting and detecting at least one of a rear collision and a side collision of the vehicle before the collision;
The headrest device according to claim 1, wherein the operation control unit operates the operation unit before a collision of the vehicle according to a detection result of the collision prediction sensor. The restraining member is a bent portion that is provided in the headrest main body so as to face the head of an occupant seated on the seat seat, and that can be bent toward the head of the occupant.
The headrest device according to any one of claims 1 to 3, wherein the actuating means is a bending actuating means that bends and deforms the bent portion. The bent portion is
As a bending point provided in the central portion in the left-right direction, it has a hinge provided in the headrest main body, and two rotation support portions pivotally supported by the hinge.
The bending actuating means is
An urging member that urges the two rotation support portions from the headrest main body portion toward the head of the occupant;
When the bending portion is bent and deformed, a penetrating pin that penetrates the overlapping portion of the two rotating support portions is provided so as to restrict the rotation of the two rotating support portions. The headrest device according to claim 4, further comprising a rotation restricting unit that pulls out and releases the restriction of the rotation of the two rotation support portions. The bent portion is
Two pivot shafts each pivoted on the headrest body in a parallel arrangement close to each other;
Two rotation support portions respectively fixed to the two rotation shafts;
The bending actuating means is
Two gears respectively fixed to the two rotation shafts;
A rack meshing with both of the two gears;
A pinion meshing with the rack;
The headrest device according to claim 4, further comprising: a motor that drives the rack via the pinion. Two pivoting side parts provided at both ends of the bent part so as to be pivotable toward the head of the occupant,
The headrest device according to any one of claims 4 to 6, further comprising side surface operation means for rotating each of the two rotational side surfaces. A seat for a passenger to sit on;
A seating portion for supporting the occupant from below;
A backrest that supports the back of the occupant;
A headrest device provided on the upper part of the backrest;
This headrest device
A headrest body,
A restraining member that is provided in the headrest main body, and that is deformed during operation and restrains at least one of the occupant's rear head or left and right sides; and
An operating means for deforming the restraining member;
A seat having a seat.

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