JP2011098588A - Seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat for a vehicle which can reduce whiplash injury of a user effectively. <P>SOLUTION: The seat 1 for a vehicle has a seat back 3 and a headrest 4. The seat back 3 has first and second side frames 3a5. The first side frame 3a5 is mounted on a seat cushion in such a way that its angle is adjustable by a reclining device, while the second side frame is mounted on the seat cushion rotatably. The side frame 3a5 is structured such that a fourth distance 21d is larger than a first distance 21a+15 mm. The first distance 20a is a horizontal distance between a head 12a of a head restraint measuring device (HRMD) 12 and a first part 4d of the front face of the headrest 4 measured by the head restraint measuring device 12 with the head restraint measuring device 12 mounted on an H-point device 11 seated on a seat 1. The fourth distance 21d is a horizontal distance between the waist height position of the torso line 11b of the H-point device 11 and a front end edge of the side frame 3a5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle seat mounted on a vehicle such as an automobile.

  A vehicle seat generally includes a seat back and a headrest, and each of the seatback and the headrest includes a frame member and a pad attached to the frame member. Conventionally, the seat back and the headrest have various shapes. For example, the seat back and the headrest are configured such that the back distance between the frame member of the seat back and the user's back and the head distance between the frame member of the headrest and the user's head are substantially the same ( Patent Document 1). As a result, when the vehicle receives a collision from the rear (at the time of rear collision), the user's head and trunk are restrained at approximately the same moment by the frame member of the seat back and the frame member of the headrest. Thus, whiplash of the user can be suppressed.

Special table 2007-507389

  However, a need still exists for a vehicle seat that can reduce user whiplash. Then, this invention makes it a subject to provide the vehicle seat which can reduce a user's whipping more effectively.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat having a configuration as described in each claim. According to the first aspect of the present invention, the seat back has the first and second side frames extending vertically at the left and right side portions. The first side frame is attached to the seat cushion by the reclining device so that the angle can be adjusted, and the second side frame is attached to the seat cushion so as to be freely rotatable. The first and second side frames are configured such that the fourth distance> the first distance + 15 mm. The first distance is the level between the head of the head restraint measuring device (HRMD) attached to the H point device seated on the seat and measured by the head restraint measuring device and the front first part of the headrest. Distance. The fourth distance is a horizontal distance between the waist height position of the torso line of the H point device and the front end edges of the first and second side frames.

  Therefore, one of the left and right side portions of the seat back is attached to the seat cushion so as to be freely rotatable. Therefore, when the weight of the user sitting on the seat due to inertial force is applied to the seatback at the time of rear collision, the force concentrates around the reclining device that is not free rotating. The first side frame is easily deformed at the height near the waist by the torque determined by the distance from the reclining device and the force.

  On the other hand, the side frame of the present invention is configured such that the fourth distance> the first distance + 15 mm. Therefore, at the time of rear collision, the head can hit the headrest before the side frame is deformed. That is, it can be assumed that the head of the head restraint measurement device is the head of the user seated on the seat. A relationship between the distance between the user's waist and the side frame is assumed by the fourth distance. That is, the waist height position of the torso line can be assumed to be the user's waist.

  At the time of rear collision, the user's head moves from the initial position in front of the headrest and hits the front surface of the headrest. The user's waist moves from the initial position where the user is in contact with the seat back while deforming the seat back pads disposed between the side frames. When the waist center line (torso line) moves between the side frames beyond the front edge of the side frame, the movement of the waist is strongly restricted by the side frame via a pad or the like. In the present invention, the fourth distance> the first distance + 15 mm.

  Therefore, at the time of a rear collision, the head hits the headrest, and thereafter the movement of the waist is strongly restricted by the side frame, and the side frame can be deformed. Thereby, it is suppressed that a head falls backward with respect to a trunk, and a user's whiplash can be suppressed. The reason for the first distance 20a + 15 mm is that the head of the human body dummy is set to the first distance +15 mm forward with respect to the headrest in consideration of the user's sitting posture and the like in the rear impact test.

It is a perspective view of a vehicle seat. It is a perspective view of a vehicle seat and a first human body dummy. It is a left view of a part of vehicle seat and the first human body dummy. It is a left view of a part of vehicle seat and a second human body dummy. It is a left side view of a part of a vehicle seat and a second human body dummy at the time of a rear collision. FIG. 5 is a left side view of a part of a vehicle seat and a second human body dummy at the time of a rear impact having a large impact.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the seat 1 includes a seat cushion 2, a seat back 3, and a headrest 4. The seat cushion 2, the seat back 3, and the headrest 4 have frame members 2a to 4a, pads 2b to 4b, and skins 2c to 4c, respectively. The pads 2b to 4b are made of an elastic member and are attached to the frame members 2a to 4a. The skins 2c to 4c are attached to the surfaces of the pads 2b to 4b.

  As shown in FIG. 1, the seat cushion 2 is attached to a floor 15 of a vehicle such as an automobile via a slide rail 5. The slide rail 5 holds the seat cushion 2 so that the position of the seat cushion 2 can be adjusted in the front-rear direction with respect to the floor surface 15. The seat back 3 is attached to the rear portion of the seat cushion 2 via the reclining device 6 and the hinge pin 7, and can stand up with respect to the seat cushion 2. The reclining device 6 rotatably attaches the seat back 3 to the seat cushion 2 and holds the seat back 3 so that the angle can be adjusted. The hinge pin 7 attaches the seat back 3 to the seat cushion 2 so as to be freely rotatable.

  As shown in FIG. 1, the frame member 3a of the seat back 3 includes a side panel 3a2, an upper pipe 3a1, and a lower frame 3a3. The lower frame 3a3 has a pipe shape and extends in the width direction at the lower portion of the seat back 3. The lower frame 3 a 3 is located on the center of rotation of the seat back 3 with respect to the seat cushion 2. The side panel 3a2 has a plate shape and extends in the vertical direction at the left and right lower portions of the seat back 3. Therefore, the side panel 3a2 constitutes the lower part of the side frames 3a5 and 3a6 extending vertically at the left and right side portions of the seat back 3.

  As shown in FIG. 1, the upper pipe 3a1 integrally includes left and right upright portions 3a11 and a connecting portion 3a12. The upright portion 3a11 extends upward from the upper end portion of the side panel 3a2. Therefore, the standing portion 3a11 constitutes the upper part of the side frames 3a5 and 3a6. The connecting portion 3a12 extends in the width direction at the upper portion of the seat back 3, and connects the upper ends of the pair of upright portions 3a11. Accordingly, the connecting portion 3a12 constitutes an upper frame 3a4 that extends in the width direction at the top of the seat back 3. A pair of holding portions 3e is fixed to the upper frame 3a4, and the headrest 4 is attached to the holding portion 3e.

  The headrest 4 is attached to the upper part of the seat back 3 as shown in FIGS. The frame member 4a of the headrest 4 has a pipe shape, and integrally includes a pair of stay portions 4a1 and an inner portion 4a5. The stay portion 4a1 extends downward from the headrest body and is held by the holding portion 3e. The inner portion 4a5 is disposed in the headrest body and includes an inclined portion 4a2, an upper portion 4a3, and a connecting portion 4a4. The inclined portion 4a2 extends upward and forward from the upper end portion of the stay portion 4a1. The upper part 4a3 extends in a substantially straight line from the upper end of the inclined part 4a2 upward and forward. The connecting portion 4a4 extends in the width direction along the upper portion of the headrest 4, and connects the upper ends of the pair of upper portions 4a3.

  As shown in FIGS. 2 and 3, a first human body dummy 10 is installed on the sheet 1 in order to measure the shape of the sheet 1. The first person dummy 10 includes an H point device (SAE 3-dimensional H-point machine) 11 and a head restraint measuring device (HRMD) 12. The H point device 11 is a three-dimensional mannequin for measuring an H point (hip point) 11a and a torso angle 11c.

  As shown in FIG. 3, the H point 11 a is the center of rotation of the torso and thigh of the first human body dummy 10. The torso angle 11c is an angle between a perpendicular passing through the H point 11a of the first human body dummy 10 and the torso line 11b. The torso line 11b is the center line when the first human body dummy 10 is placed at the rearmost position. When measuring the shape of the seat 1, the rearward tilt angle of the seat back 3 is adjusted so that the torso angle 11c is a predetermined angle. The predetermined torso angle 11c is, for example, 10 to 35 ° (for example, 25 ± 1 °) determined by evaluation standards (E-NCAP, etc.) and laws and regulations of each country.

  The head restraint measuring device 12 is a device for measuring the position of the headrest 4 as shown in FIGS. 2 and 3, and is made of, for example, ICBC. The head restraint measuring device 12 has a head 12a, probes 12b and 12c attached to the head 12a, and a neck 12d extending downward from the head 12a and attached to the H point device 11. The height of the head 12a is determined based on, for example, a 50th percentile adult male. Thereby, the position of the head 12a with respect to the H point 11a is determined. The probe 12 c is an instrument that measures the height of the headrest 4, and the height of the headrest 4 is measured by the distance between the probe 12 c and the apex of the headrest 4.

  The probe 12b is an instrument for measuring setback (first distance 20a) as shown in FIG. The setback is a horizontal distance between the rear surface of the head 12a and the front surface of the headrest 4. The setback can be measured by moving the rear part 12a1 of the head 12a horizontally until it hits the front first part 4d of the headrest 4 and measuring the horizontal movement distance.

  As shown in FIG. 3, the side frame 3a5 of the seat back 3 (the side frame 3a6 shown in FIG. 1) has a predetermined second distance 20b, third distance 20c, and fourth distance 20d with respect to the torso line 11b. Configured to be. The second distance 20b is a horizontal distance (a distance in the front-rear direction) between the front surface first part 4d of the headrest 4 and the front surface of the upper frame 3a4 located behind the front surface first part 4d. The second distance 20b> the first distance 20a is preferable, and the first distance 20a + 120 mm> the second distance 20b> the first distance 20a + 15 mm is more preferable.

  The third distance 20c is a horizontal distance between the H point 11a and the front end edges of the side frames 3a5 and 3a6 as shown in FIG. It is preferable that the first distance 20a + 120 mm> the third distance 20c> the first distance 20a + 15 mm. The fourth distance 20d is a horizontal distance between the waist height position of the torso line 11b and the front end edges of the side frames 3a5 and 3a6. It is preferable that the first distance 20a + 120 mm> the fourth distance 20d> the first distance 20a + 15 mm. The waist height is a height 150 ± 100 mm (for example, 200 mm) from the H point 11a.

  As shown in FIG. 3, the side frames 3a5 and 3a6 are formed such that the front edge is located between the first line 22a and the second line 22b. The first line 22a is a line connecting the center of the upper frame 3a4 and the center of the lower frame 3a3. The second line 22b is a line connecting the second reference position 21b, the fourth reference position 21d, and the third reference position 21c.

  As shown in FIG. 3, the second reference position 21 b is located behind the first front portion 4 d of the headrest 4 by the first distance 20 a +15 mm and at the height of the upper frame 3 a 4. The fourth reference position 21d is located behind the first distance 20a + 15 mm from the waist height position of the torso line 11b. The third reference position 21c is located behind the first distance 20a + 15 mm from the H point 11a.

  The rear end edges of the side frames 3a5 and 3a6 are arcuate as shown in FIG. 3, and a recess 3a7 is formed at the center. The recess 3a7 is recessed forward of the first line 22a. Therefore, the space behind the seat 1 is widened by the recess 3a7. The recess 3a7 has a great effect in the seat back 3 having a small thickness.

  As shown in FIG. 3, the frame member 4a of the headrest 4 is configured such that an intersection line 23c between the first surface 23a and the second surface 23b is positioned forward of the upper frame 3a4. The first surface 23a is an extended surface of the front surface of the upper portion 4a3. The second surface 23b is a surface in contact with the front surface of the upper frame 3a4 and the front surface of the lower frame 3a3. The intersection line 23c is preferably configured to be located 5 to 100 mm ahead of the upper frame 3a4 and the holding portion 3e.

  Further, the frame member 4a is configured such that the first angle 23d <the second angle 23e, as shown in FIG. The first angle 23d is an angle between the first surface 23a and the second surface 23b. The second angle 23e is an angle between the torso line 11b of the first human body dummy 10 seated on the seat 1 and the center line of the neck 12d. The frame member 4a is preferably configured such that the first angle 23d is 5 to 30 degrees smaller than the second angle 23e.

  As shown in FIGS. 1 and 4, a plurality of (for example, two) wires 3d are attached between the upper frame 3a4 and the lower frame 3a3. The wire 3d is an elastically deformable metal rod, and elastically supports the back surface of the pad 3b. The lower wire portion 3d1 is fixed to the surface of the lower frame 3a3 by welding or the like, and is positioned in front of the center of the lower frame 3a3. The upper wire portion 3d4 is fixed to the surface of the upper frame 3a4 by welding or the like, and is positioned on the front side of the center of the upper frame 3a4.

  As shown in FIGS. 1 and 4, the wire 3 has a wire body 3d3 extending between the upper frame 3a4 and the upper frame 3a4. The wire body 3d3 has a rear extension 3d2 that bends and extends rearward near the wire lower part 3d1. The rear extension 3d2 projects rearward from the first line 22a.

  When performing a rear-end collision test (a test when the vehicle receives an impact from the rear), the second human body dummy 13 shown in FIG. 4 is seated on the seat 1 instead of the first human body dummy 10 shown in FIG. The second human body dummy 13 is, for example, BioRID-II, and has a trunk 13b and a head 13c. The body 13b has an H point 13a, and the H point 13a is aligned with the H point 11a shown in FIG.

  As shown in FIG. 4, the head 13c is attached to the trunk 13b via a neck 13d. The head 13c is installed such that the distance between the rear surface of the head 13c and the front surface of the headrest 4 is the installation distance 20e. The installation distance 20e is set to the first distance 20a + 15 mm in consideration of the user's posture and the like. Thereby, the position and posture of the second human body dummy 13 with respect to the seat 1 are determined.

  As shown in FIGS. 4 and 5, the second human body dummy 13 moves substantially horizontally (rearward) relative to the seat 1 by the inertial force at the time of rear collision. The head 13c moves from an initial position in front of the headrest 4 to a position where it hits the front surface of the headrest 4, and further approaches the frame member 4a while deforming the pad 4b. The body 13b moves backward relative to the seat back 3 while deforming the pad 3b from an initial position where a part of the body 13b hits the seat back 3.

  When the vehicle receives a greater impact from the rear, the movement of the head 13c is restricted by the upper portion 4a3 and the connecting portion 4a4 of the frame member 4a as shown in FIGS. Beyond that, the frame member 4a is pushed and deformed by the head 13c. Movement of the upper portion of the body 13b is restricted by the upper frame 3a4. If it exceeds that, upper frame 3a4 will be pushed by trunk 13b, and side frames 3a5 and 3a6 will change.

  The movement of the waist and hips of the body 13b is restricted by the side frames 3a5 and 3a6. Specifically, the body 13b moves while deforming the pad 3b and the skin 3c of the seat back 3 disposed between the side frames 3a5 and 3a6. When the center line of the waist and buttocks (line corresponding to the spine) moves between the side frames 3a5 and 3a6 beyond the front edge of the side frames 3a5 and 3a6, the movement of the waist and buttocks moves the pad 3b and the skin 3c. Through the side frames 3a5 and 3a6. Beyond that, the side frames 3a5, 3a6 can be deformed.

  As shown in FIG. 3, the frame members 3a and 4a are configured such that the first distance 20a to the fourth distance 20d have the above relationship. Therefore, at the time of a rear collision, the head 13c first hits the headrest 4. Thereafter, the movement of the upper portion of the body 13b is restrained by the upper frame 3a4, and the waist and the buttocks of the body 13b are restricted by the cooperation of the side frames 3a5, 3a6 and the pad 3b.

  As shown in FIG. 3, the intersection line 23c is located in front of the upper frame 3a4. Thereby, the upper part 4a3 of the frame member 4a is located relatively forward with respect to the upper frame 3a4. Therefore, at the time of a rear collision, first, the movement of the head 12a is restrained by the upper portion 4a3 of the frame member 4a. The frame member 4a is pushed rearward by the head 12a and tilted rearward with respect to the seat back 3. This increases the first angle 23d.

  On the other hand, the frame member 4a is configured such that the first angle 23d <the second angle 23e. Therefore, the first angle 23d of the frame member 4a with respect to the seat back 3 approaches the second angle 23e. Therefore, even when the frame member 4a is inclined rearward with respect to the seat back 3, the head 12a can be prevented from falling backward with respect to the trunk (torso line 11b). Thus, the angle of the user's head with respect to the trunk is small before and after the rear collision, thereby suppressing the user's whiplash (see FIGS. 4 and 6).

  As shown in FIG. 3, the upper frame 3a4 and the headrest 4 are configured such that the second distance 20b> the first distance 20a. Therefore, the distance between the head of the user seated on the seat 1 and the headrest 4 is assumed by the first distance 20a. That is, it can be assumed that the head 12 a of the head restraint measurement device 12 is the head of the user seated on the seat 1. The distance between the user's upper torso and the upper frame 3a4 is determined by the second distance 20b. That is, the back surface of the upper part of the user's torso is substantially equal to the front-rear direction position of the front first part 4 d of the headrest 4. Therefore, the second distance 20b can be assumed to be the distance between the back surface of the upper body and the upper frame 3a4.

  At the time of rear collision, the user moves relatively horizontally (rearward) relative to the seat 1 by inertial force. Therefore, the user's head moves from the initial position ahead of the headrest 4 and hits the front surface of the headrest 4. The user's torso moves backward from an initial position where a part of the user's torso is in contact with the seat back 3, and the movement is restricted by the upper frame 3a4.

  In this embodiment, the second distance 20b> the first distance 20a. Therefore, after the head hits the front surface of the headrest 4, the movement of the upper body can be restrained by the upper frame 3a4. Therefore, it is suppressed that the head falls backward with respect to the upper part of the trunk. Thereby, a user's whiplash can be suppressed. Further, since the second distance 20b> the first distance 20a, it can be manufactured more easily than a structure in which the two distances are substantially the same as in Patent Document 1.

  The upper frame 3a4 and the headrest 4 are preferably configured so that the second distance 20b> the first distance 20a + 15 mm as shown in FIG. Therefore, at the time of rear collision, the user's head can surely hit the headrest 4 before the movement of the upper part of the user's body is restrained by the upper frame 3a4. The reason for setting the first distance 20a + 15 mm is that the installation distance 20e shown in FIG. 4 is taken into consideration. That is, in the rear impact test, the head 13c of the human body dummy 13 is set to the first distance 20a + 15 mm forward with respect to the headrest 4 in consideration of the seating posture of the user. By setting the second distance 20b> the first distance 20a + 15 mm, the head 13c of the human body dummy 13 is effectively suppressed from falling backward with respect to the trunk 13b. This effect could be confirmed by a rear impact test.

  Further, as shown in FIG. 3, the side frames 3a5 and 3a6 are configured such that the third distance 20c> the first distance 20a + 15 mm. Therefore, the relationship between the distance between the user's buttocks and the side frames 3a5 and 3a6 is assumed by the third distance 20c. That is, it can be assumed that the H point 11a is the buttocks of the user seated on the seat 1. Since the third distance 20c> the first distance 20a + 15 mm, the movement of the buttocks is strongly restricted by the side frames 3a5 and 3a6 after the user's head hits the front surface of the headrest 4 at the time of rear collision. Is done. Thereby, it is suppressed that a head falls backward with respect to a trunk, and a user's whiplash can be suppressed.

  Further, as shown in FIG. 3, the side frames 3a5 and 3a6 are configured such that the fourth distance 20d> the first distance 20a + 15 mm. Therefore, the relationship between the distance between the user's waist and the side frames 3a5, 3a6 is assumed by the fourth distance 20d. That is, the waist height position of the torso line 11b can be assumed to be the user's waist. Since the fourth distance 20d> the first distance 20a + 15 mm, the movement of the waist is strongly restricted by the side frames 3a5 and 3a6 after the user's head hits the front surface of the headrest 4 at the time of rear collision. Is done. Thereby, it is suppressed that a head falls backward with respect to a trunk, and a user's whiplash can be suppressed.

  Further, as shown in FIG. 3, the front end edges of the side frames 3a5 and 3a6 are positioned in front of the first line 22a and positioned in the rear of the second line 22b. Therefore, at the time of a rear collision, the user's head first hits the headrest 4. Next, the movement of the user's upper body is restrained by the upper frame 3a4, and the movement of the buttocks and the waist is restricted by the side frames 3a5 and 3a6.

  Further, the upper portion 4a3 of the frame member 4a is configured such that the first angle 23d <the second angle 23e-5 °, as shown in FIG. Therefore, even when the frame member 4a is tilted 5 ° backward with respect to the seat back 3, the user's neck can be prevented from falling backward with respect to the trunk. Thus, the user's whiplash can be suitably suppressed.

  At the time of rear collision, the weight of the user is applied to the seat back 3 by inertial force. On the other hand, as shown in FIG. 4, the lower wire portion 3d1 and the upper wire portion 3d4 are attached to the lower frame 3a3 and the upper frame 3a4 in front of the centers of the lower frame 3a3 and the upper frame 3a4. Therefore, the wire lower portion 3d1 and the wire upper portion 3d4 can be suppressed from being pressed against the lower frame 3a3 and the upper frame 3a4 when being subjected to the force from the front to the rear by the pad 3b and being peeled off from the lower frame 3a3 and the upper frame 3a4.

  Moreover, the wire 3d has the back extension part 3d2, as shown in FIG. Therefore, at the time of a rear collision, the movement of the user's torso toward the seat back 3 is not easily disturbed by the wire 3d. Therefore, the user's torso moves smoothly to the seat back 3 side. Thus, the user's whiplash that can occur by restricting the movement of the trunk before the head can be suppressed.

  Further, the rear extension 3d2 of the wire 3d extends rearward from the first line 22a as shown in FIG. Therefore, the wire body 3d3 is located sufficiently rearward with respect to the upper frame 3a4 and the lower frame 3a3. Therefore, at the time of a rear collision, the user is not easily disturbed by the wire 3d and can surely enter the seat back 3 backward.

  The seat back 3 includes first and second side frames 3a5 and 3a6 as shown in FIGS. The first side frame 3a5 is attached to the seat cushion 2 by the reclining device 6 so that the angle can be adjusted, and the second side frame 3a6 is attached to the seat cushion 2 so as to be freely rotatable. The first and second side frames 3a5 and 3a6 are configured such that the fourth distance 20d> the first distance 20a + 15 mm.

  Therefore, one of the left and right side portions of the seat back 3 is attached to the seat cushion 2 so as to be freely rotatable. Therefore, when the weight of the user seated on the seat 1 is applied to the seat back 3 by the inertia force at the time of a rear collision, the force concentrates around the reclining device 6 that is not free rotating. The first side frame 3a5 is easily deformed at the height near the waist due to the torque determined by the distance and force from the reclining device 6.

  In contrast, the side frames 3a5 and 3a6 are configured such that the fourth distance 20d> the first distance 20a + 15 mm. Therefore, the head can hit the headrest 4 before the side frames 3a5 and 3a6 are deformed at the time of rear collision. That is, it can be assumed that the head 12 a of the head restraint measurement device 12 is the head of the user seated on the seat 1. The relationship between the distance between the user's waist and the side frames 3a5 and 3a6 is assumed by the fourth distance 20d. That is, the waist height position of the torso line 11b can be assumed to be the user's waist.

  At the time of rear collision, the user's head moves from the initial position in front of the headrest 4 and hits the front surface of the headrest 4. The user's waist moves from the initial position where the user hits the seat back 3 while deforming the pad 3b of the seat back 3 disposed between the side frames 3a5 and 3a6. When the center line (torso line) of the lumbar region moves between the side frames 3a5 and 3a6 beyond the front edge of the side frames 3a5 and 3a6, the lumbar region moves strongly by the side frames 3a5 and 3a6 via the pads 3b and the like. Be regulated. In this embodiment, the fourth distance 20d> the first distance 20a + 15 mm.

  Therefore, at the time of a rear collision, the head hits the headrest 4, and thereafter the movement of the waist is strongly restricted by the side frames 3a5, 3a6, and the side frames 3a5, 3a6 can be deformed. Thereby, it is suppressed that a head falls backward with respect to a trunk, and a user's whiplash can be suppressed. The reason for the first distance 20a + 15 mm is that the head 13c of the human body dummy 13 is moved forward with respect to the headrest 4 to the first distance + 15mm in consideration of the user's sitting posture in the rear-end collision test as shown in FIG. It is because it sets.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) The upper frame 3a4 of the seat back 3 shown in FIG. 1 has a pipe shape, but may have a plate shape or the like.
(2) The inner portion 4a5 of the headrest 4 shown in FIG. 1 has a pipe shape, but may have a plate shape or the like.
(3) The upper portion 4a3 of the headrest 4 shown in FIG. 3 is linear, but may be curved. The first surface 23a in the case where the upper portion is curved can be determined by a surface passing through the front surface at the uppermost portion of the upper portion and the frontmost surface of the upper portion.
(4) The wire 3 shown in FIG. 4 has the back extension part 3d2 which bends and extends back near the wire lower part 3d1. However, the wire may have a rearward extending portion that bends backward and extends in the vicinity of the central portion of the wire body or the upper portion of the wire. Alternatively, the wire main body may have a bow shape, and the rearward extension portion may be formed over substantially the entire length of the wire main body.
(5) The seat 1 shown in FIG. 1 is mounted on a vehicle such as an automobile, but may be mounted on a ship, an aircraft, or the like.

DESCRIPTION OF SYMBOLS 1 ... Seat 2 ... Seat cushion 2a, 3a, 4a ... Frame member 2b, 3b, 4b ... Pad 2c, 3c, 4c ... Skin 3 ... Seat back 3a3 ... Lower frame 3a4 ... Upper frame 3a5 ... First side frame 3a6 ... Second side frame 3a7 ... concave portion 3d ... wire 3d1 ... wire lower portion 3d2 ... rearward extending portion 3d3 ... wire body 3d4 ... wire upper portion 3e ... holding portion 4 ... headrest 4a1 ... stay portion 4a3 ... upper portion 4a5 ... inner portion 4d ... Front first part 5 ... slide rail 6 ... reclining device 7 ... hinge pin 10 ... first human body dummy 11 ... H point device 11a, 13a ... H point 11b ... torso line 12 ... head restraint measuring devices 12a, 13c ... head 12d, 13d ... neck 13 ... second human body dummy 13b ... trunk 20a ... first distance 20b ... second distance 2 c ... third distance 20d ... fourth distance 20e ... installation distance 21b ... second reference position 21c ... third reference position 21d ... fourth reference position 22a ... first line 22b ... second line 23a ... first surface 23b ... first Two surfaces 23c ... intersecting line 23d ... first angle 23e ... second angle

Claims (5)

A vehicle seat having a seat back standing on a seat cushion, and a headrest attached to an upper portion of the seat back,
The seat back includes first and second side frames extending vertically at left and right side portions, and the first side frame is attached to the seat cushion by a reclining device so that the angle can be adjusted. Two side frames are attached to the seat cushion so as to be freely rotatable,
The first and second side frames are configured such that fourth distance> first distance + 15 mm,
The first distance is determined by attaching a head restraint measuring device (HRMD) to an H point device seated on the seat and measuring the head restraint measuring device using the head restraint measuring device and the front surface of the headrest. Is the horizontal distance from some
The vehicle seat according to claim 4, wherein the fourth distance is a horizontal distance between a waist height position of a torso line of the H point device and front end edges of the first and second side frames. The vehicle seat according to claim 1,
The seat back has an upper frame that extends in the width direction at the top and connects the first and second side frames;
The upper frame is configured such that second distance> first distance + 15 mm,
The vehicle seat according to claim 2, wherein the second distance is a horizontal distance between the front first part of the headrest and a front surface of the upper frame located behind the front front part. The vehicle seat according to claim 1 or 2,
The first and second side frames are configured such that the third distance> the first distance + 15 mm,
The vehicle seat according to claim 3, wherein the third distance is a horizontal distance between an H point of the H point device and front end edges of the first and second side frames. The vehicle seat according to any one of claims 1 to 3,
The seat back includes a lower frame that extends in a width direction at a lower portion and connects the first and second side frames;
The front edge of the side frame is positioned forward of the first line, and is positioned rearward of the second line;
The first line is a line connecting the center of the upper frame and the center of the lower frame,
The second line is a line connecting the second reference position, the fourth reference position, and the third reference position, and the second reference position is behind the first distance +15 mm from the front first part of the headrest. And the fourth reference position is a position behind the first distance +15 mm from the waist height position of the torso line of the H point device, and the third reference position is the H position. A vehicle seat characterized by being at a position behind the first distance +15 mm from the H point of the point device. The vehicle seat according to any one of claims 1 to 4,
The seat back includes a lower frame that extends in a width direction at a lower portion and connects the first and second side frames;
The rear edge of the first and second side frames is formed with a recess recessed forward from a first line connecting the center of the upper frame and the center of the lower frame. Vehicle seat.

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