WO2012043807A1 - 車両用シートおよび車両用シートの剛性設定方法 - Google Patents
車両用シートおよび車両用シートの剛性設定方法 Download PDFInfo
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- WO2012043807A1 WO2012043807A1 PCT/JP2011/072591 JP2011072591W WO2012043807A1 WO 2012043807 A1 WO2012043807 A1 WO 2012043807A1 JP 2011072591 W JP2011072591 W JP 2011072591W WO 2012043807 A1 WO2012043807 A1 WO 2012043807A1
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- Prior art keywords
- seat
- seated person
- seat cushion
- vehicle seat
- seating
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- 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
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
- B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
- B60N2/4228—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the rear
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- 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
- B60N2/64—Back-rests or cushions
-
- 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
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
- B60N2/2222—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable the back-rest having two or more parts
-
- 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
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/4249—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats fixed structures, i.e. where neither the seat nor a part thereof are displaced during a crash
- B60N2/4256—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats fixed structures, i.e. where neither the seat nor a part thereof are displaced during a crash the shape of the seat being specially adapted for a particular purpose or for particular vehicles
- B60N2/4263—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats fixed structures, i.e. where neither the seat nor a part thereof are displaced during a crash the shape of the seat being specially adapted for a particular purpose or for particular vehicles with anti-submarining systems
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- 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
- B60N2/58—Seat coverings
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- 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
- B60N2/70—Upholstery springs ; Upholstery
-
- 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
- B60N2/70—Upholstery springs ; Upholstery
- B60N2/7023—Coach-like constructions
- B60N2/7035—Cushions
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- 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
- B60N2/70—Upholstery springs ; Upholstery
- B60N2/7094—Upholstery springs
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- 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
- B60N2205/30—Seat or seat parts characterised by comprising plural parts or pieces
Definitions
- the present invention relates to a vehicle seat and a method of setting rigidity of the vehicle seat.
- the dynamic spring constant of the first human body support located under the ischial tuberosity of the human body in the seat cushion is changed to the motion of the second human body support located under the thigh for the purpose of improving the vibration absorption characteristics.
- a technique has been disclosed in which the second human body support portion is used as a movement fulcrum at the time of vibration isolation operation, which is smaller than the target spring constant. Further, a technique similar to that of Patent Document 2 is disclosed.
- An object of the present invention is to provide a vehicle seat capable of obtaining comfortable seating feeling by reducing a feeling of pressure on a seated person.
- a first aspect of the present invention is a vehicle seat provided with a seat cushion and a seat back.
- a low rigidity region that is more flexible than the rear portion, which is a high rigidity region is provided in the front portion of the seat cushion, and rigidity distribution in the front-rear direction is imparted to the seat cushion.
- a low rigidity area that is more flexible than a rear area that is a high rigidity area is provided in the front part of the seat cushion. It is a rigidity setting method of a vehicular seat which gave rigidity distribution of the direction of order to a seat cushion.
- FIG. 1 is a perspective view showing a vehicle seat for a rear seat according to a first embodiment of the present invention.
- FIG. 2 is a side view of the vehicle seat according to the first embodiment.
- FIG. 3 is a view showing the relationship between the function of the vehicle seat according to the present invention and the action of a seated person when seated.
- FIG. 4 is a view for explaining the vehicle seat for the rear seat according to the second embodiment of the present invention as a perspective view in (A) and a side view in (B).
- FIG. 5 is a view for explaining the operation of the vehicle seat according to the second embodiment.
- FIG. 1 is a perspective view showing a vehicle seat for a rear seat according to a first embodiment of the present invention.
- FIG. 2 is a side view of the vehicle seat according to the first embodiment.
- FIG. 3 is a view showing the relationship between the function of the vehicle seat according to the present invention and the action of a seated person when seated.
- FIG. 4 is a view for explaining the
- FIG. 6 is a view showing the seat back according to the second embodiment
- (A) is a cross-sectional view of the seat back
- (B) is a perspective view of the seat back frame.
- FIG. 7 is a side view showing a bending deformation mode in the seat back according to the second embodiment, in which (A) shows the case of a small person and (B) shows the case of a large person.
- FIG. 8 is a view showing an example of adjusting the hardness of the hip point in the seat cushion according to the second embodiment by (A) and (B).
- FIG. 9 is a view showing a seat back according to a first modification of the second embodiment, in which (A) is a cross-sectional view of the seat back, and (B) is a perspective view of a seat back frame.
- FIG. 10 is a view showing a seat back according to a second modification of the second embodiment, in which (A) is a cross-sectional view of the seat back, and (B) is a perspective view of a seat back frame.
- FIG. 11 is a view showing a seat back according to a third modification of the second embodiment, in which (A) is a cross-sectional view of the seat back, and (B) is a perspective view of a seat back frame.
- FIG. 12 is a perspective view showing a seat back frame according to a fourth modification of the second embodiment.
- FIG. 13 is a perspective view showing a seat back frame according to a fifth modification of the second embodiment.
- FIG. 14 is a perspective view showing a seat back frame of a seat back according to a sixth modification of the second embodiment.
- FIG. 15 is a side view showing a vehicle seat for the rear seat according to a third embodiment of the present invention.
- FIG. 16 is a cross-sectional view showing the front portion of the seat cushion according to the third embodiment.
- FIG. 17 is a cross-sectional view showing a front portion of a seat cushion according to a first modification of the third embodiment.
- FIG. 18 is a cross-sectional view showing a front portion of a seat cushion according to a second modification of the third embodiment.
- FIG. 19 is a cross-sectional view showing a front portion of a seat cushion according to a third modification of the third embodiment.
- FIG. 20 is a cross-sectional view showing a front portion of a seat cushion according to a fourth modification of the third embodiment.
- FIG. 21 is a cross-sectional view showing a front portion of a seat cushion according to a fifth modification of the third embodiment.
- FIG. 22 is a cross-sectional view showing a front portion of a seat cushion according to a sixth modification of the third embodiment.
- FIG. 23 is a cross-sectional view showing a front portion of a seat cushion according to a seventh modified example of the third embodiment.
- FIG. 24 is a side view showing a vehicle seat for the rear seat according to a fourth embodiment of the present invention.
- FIG. 25 is a view for explaining the operation of the vehicle seat according to the fourth embodiment.
- FIG. 21 is a cross-sectional view showing a front portion of a seat cushion according to a fourth modification of the third embodiment.
- FIG. 21 is a cross-sectional view showing a front portion of a seat cushion according to a fifth modification of the third
- FIG. 26 is a view for explaining the vehicle seat for the rear seat according to the fifth embodiment of the present invention as a perspective view in (A) and a side view in (B).
- FIG. 27 is a view showing the configuration of the inclined surface according to the fifth embodiment.
- FIG. 28 is a view showing a vehicle seat according to a first modification of the fifth embodiment, wherein (A) is a view for explaining the operation of the vehicle seat, and (B) is a configuration of the main part.
- FIG. FIG. 29 is a view showing another configuration example of the inclined surface according to the fifth embodiment by (A) to (C).
- FIG. 30 is a side view showing a vehicle seat for the rear seat according to a sixth embodiment of the present invention.
- FIG. 31 is a side view showing a vehicle seat according to a first modification of the sixth embodiment.
- FIG. 32 is a side view showing a configuration example of the friction coefficient distribution according to the second modified example of the sixth embodiment.
- FIG. 33 is a side view showing a vehicle seat according to a third modification of the sixth embodiment.
- FIG. 34 is a side view showing a vehicle seat according to a fourth modification of the sixth embodiment.
- FIG. 35 is a side view showing a configuration example of the surface layer rigidity distribution according to the fifth modification of the sixth embodiment, wherein (A) is an enlarged sectional view of the surface structure of the seating surface, and (B) is a back view.
- FIG. 8C is an enlarged cross-sectional view taken along the line C-C of the surface layer structure of the surface.
- FIG. 36 is a side view showing a vehicle seat for the rear seat according to a seventh embodiment of the present invention.
- FIG. 37 is a view showing a vehicle seat according to a modification of the seventh embodiment, in which (A) is a side view of the vehicle seat, and (B) is an explanation of a bending mode of the seat back. It is a figure to do.
- FIG. 38 is a side view showing a vehicle seat for the rear seat according to an eighth embodiment of the present invention.
- FIGS. 1 to 3 A rear seat vehicle seat 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
- the rear seat vehicle seat 1 mainly includes a seat cushion 2 and a seat back 3.
- the seat back 3 is connected to a rear end portion of the seat cushion 2 via a reclining device 5 so as to be capable of tilting in the front-rear direction.
- a headrest 4 is provided at an upper end portion of the seatback 3.
- the seat cushion 2 includes at least a front portion 2f and a rear portion 2g, as shown in FIG.
- the front portion 2 f is a portion including the front end portion of the seat cushion 2, and in a side view of the seat cushion 2, the front end of the seat cushion 2 to the thigh length of the seated person D (the length from the large trochanter to the knee joint In the range of about 1/6 to 1/3.
- the rear portion 2g is a portion (a portion other than the front portion 2f) of the seat cushion 2 adjacent to the rear of the front portion 2f.
- the front portion 2f of the seat cushion 2 is set to a low rigidity region PSc
- the rear portion 2g of the seat cushion 2 is set to a high rigidity region PHc which is higher in rigidity than the low rigidity region PSc.
- the seat cushion 2 is provided with a stiffness distribution including the low stiffness region PSc and the high stiffness region PHc in the front-rear direction.
- the rigidity of the low rigidity region PSc and the high rigidity region PHc is appropriately adjusted by setting the spring constant of the pad material of the seat cushion 2 described later.
- the high rigidity region PHc is a standard required for a vehicle seat cushion that can elastically support the base side of the thigh firmly with emphasis on the buttocks that are the center of gravity of the seated person D. It is desirable to have a typical spring constant.
- the low rigidity region PSc is set to an appropriate spring constant capable of flexibly supporting the thigh front portion of the seated person D to such an extent that the discomfort does not occur due to the sinking of the pad material.
- the mechanical properties such as rigidity of the regions PSc and PHc, and the position, size, range, and the like thereof are set based on the size, weight, and the like of each part of the body of the seated person D, as described above.
- the 50th percentile value of a male adult male in a country where the vehicle seat 1 is produced, sold, used, etc. can be adopted as the size, weight, etc. of each part of the body of the seated person D serving as the standard.
- mechanical properties such as dimensions or rigidity of each part of the vehicle seat 1 can be compared with dimensions, weights, etc. of each part of the body of the seated person D
- the size, weight, etc. of the seated person D serving as a reference in this case can also be determined in the same manner as in the present embodiment.
- FIG. 3 is a view showing a relationship between a series of actions when the seated person D sits on the vehicle seat 1 and functions of the vehicle seat 1.
- the seated person D sits down. That is, the seated person D places the buttocks on the seating surface 2 a of the seat cushion 2. At this time, the seating person D places the buttocks on the seating surface 2a while maintaining the arrangement of the left and right legs in the state when they get in the rear seat.
- the arrangement of the legs when getting into the rear seat for example, one of the left and right legs is located in the foot space of the rear seat and the other leg is located outside the vehicle, or the toe is inside in the vehicle width direction
- the body of the seated person D is directed obliquely to the front-rear direction of the vehicle seat 1.
- the seated person D rotates the body around the buttocks to change direction while moving the buttocks placed on the seating surface 2a of the seat cushion 2 to a predetermined position on the seating surface 2a.
- the direction is made to coincide with the longitudinal direction of the vehicle seat 1.
- the seated person D leans backward on the seat back 3 and leans over.
- the back of the seated person D contacts the backrest surface 3a.
- the seated person D presses the back against the backrest surface 3 a of the seat back 3 to support the spine on the seat back 3. At this time, the seated person D may move the buttocks on the seating surface 2a while pressing the back against the backrest surface 3a.
- the seated person D presses the back against the backrest 3a of the seatback 3 while stretching the leg against the floor to reduce the load on the buttocks, and finally adjusts the position of the hip point HP.
- the hip point HP is a point corresponding to the hip joint of the seated person D.
- the seat cushion 2 of the vehicle seat 1 is mainly the body of the seated person D in the process from seating the seated person D in the rear seat to performing the direction change.
- the rear portion 2g (high rigidity region PHc) of the seat cushion 2 receives the buttocks of the seated person D, and also while the seated person D changes direction, the rear portion 2g Supports the movement and rotation of the buttocks on the seat cushion 2.
- the seat back 3 applies a reaction force to the back of the seated person D via the back surface 3a, while the seat cushion 2 passes the seating surface 2a.
- a reaction force is applied to the body below the buttocks, such as the thighs, knees, and lower legs of the seated person D.
- the vehicle seat 1 exerts the following function while applying a reaction force to the seated person D's body.
- the seated person D bends and sits on these joints while positioning the knee joints in front of the hip joints. Since the portion below the knee of the seated person D who is seated is supported by the floor of the rear seat, the load applied to the seat cushion 2 is concentrated in the area immediately below the buttocks, and the area under the buttocks of the seat cushion 2 is It deforms to sink more than the surrounding area. At this time, the seating surface 2a on the front side of the area directly below the buttocks is inclined (backwardly inclined) so that the seating surface 2a on the front side is inclined (backward inclination). D is in a posture in which the user naturally raises his / her knee (hereinafter referred to as kneeling posture).
- kneeling posture a posture in which the user naturally raises his / her knee
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and a relatively high rigidity is given to the high rigidity region PHc.
- the amount of sinking of the cushion pad in the region immediately below the buttocks of the seated person D is appropriately suppressed. Therefore, the resistance to the rearward movement of the buttocks is reduced, and the backward movement of the seated person D on the seating surface 2a is facilitated.
- the high rigidity region PHc suppresses excessive sinking of the cushion pad, so the resistance to the steered person D to turn is also reduced. Furthermore, in the vehicle seat 1 according to the present embodiment, the low rigidity region PSc is provided in the front portion 2 f of the seat cushion 2, and when the front portion 2 f contacts the knee or lower leg of the seated person D The resistance to movement or turning on the seating surface 2a of the seat occupant D (such as the forward movement when turning backward or turning) is further reduced.
- the front portion 2f of the seat cushion 2 is set as the low rigidity region PSc, and the rear portion 2g is set as the high rigidity region PHc.
- the hip point HP of the seated person D can be easily optimized by suppressing the resistance to the series of actions performed by the seated person D (especially, the rearward movement and turning of the seated person D on the seat cushion 2). Can lead to
- the low rigidity region PSc is provided in the front portion 2f of the seat cushion 2, and the low rigidity region PSc can be deformed with a relatively small load. Can position the buttocks more rearward than the seating surface 2a, and the substantial foot space of the vehicle seat 1 is expanded.
- the seated person D reduces the load on the buttocks by pressing the back against the floor surface while pressing the back against the backrest surface 3a of the seatback 3, etc.
- the position of hip point HP may be shifted.
- the low rigidity region PSc is provided in the front portion 2f of the seat cushion 2 and the low rigidity region PSc is deformed by a relatively small load. You can easily extend the leg even when you hold it.
- the seat cushion 2 sinks largely compared to the case of a small-scaled person, so the inclination angle of the seating surface 2a in front of the buttocks also increases.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and the resistance to the rearward movement of the seated person D is suppressed.
- the seat occupant D is quickly guided backward to the kneeling posture along the seat surface 2a which is more greatly inclined. As a result, the knee room ahead of the knees of the seated person D is secured early after sitting, and substantially the same effect as when the knee room is enlarged can be obtained.
- ⁇ HP deviation prevention function> Even after the seated person D finally adjusts the position of the hip point HP, the load applied from the seated person D to the seating surface 2a due to the movement of the seated person D itself or the vibration of the vehicle generated along with traveling. (Pressure) may fluctuate.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and the rigidity of the cushion pad under the buttocks of the seated person D is relatively high. Even if the load applied to the seating surface 2a changes, the change in the amount of sinking of the cushion pad is suppressed. Thereby, the displacement of the hip point HP is more reliably prevented.
- the seated person D while sitting on the vehicle seat 1, the seated person D is in the knee-standing posture, and the center of gravity thereof is closer to the rear. Therefore, the buttocks of the seated person D tend to slide more rearward.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and the resistance to backward movement of the seated person D on the seating surface 2a is reduced. The buttocks of the seated person D are more likely to slide rearward.
- the vehicle seat 1 is provided with a seat back 3, and the seat back 3 receives from behind the buttocks which are going to move further to the rear side. Therefore, the buttocks of the seated person D are stably held at a position where the force to slide rearward and the forward pressing force by the seat back 3 are balanced. Thereby, the positional deviation of the hip point HP is more reliably prevented.
- the seating surface 2a of the vehicle seat 1 has the largest deformation portion LP between the rear inclined surface and the backrest surface 3 a of the seat back 3.
- the maximum deformation portion LP is a point at which the amount of deformation (sinking amount) caused by the load at the time of sitting becomes the maximum or a point set so as to be the maximum.
- the front and rear of the high rigidity region PHc It is located in the approximate center of the direction. Since the vehicle seat 1 supports the pelvis Dc of the seated person D at the maximum deformation portion LP, the pelvis Dc is stably held in a fixed posture. Thereby, the positional deviation of the hip point HP is more reliably prevented.
- the vehicle seat 1 of the first embodiment includes the seat cushion 2 and the seat back 3, and the front portion 2 f of the seat cushion 2 is more flexible than the rear portion 2 g which is the high rigidity region PHc. Since the low rigidity region PSc is provided to impart rigidity distribution in the front-rear direction to the seat cushion 2, the above three functions, namely, the above-described three functions in the series of actions when the seated person D sits on the vehicle seat 1.
- the HP guide function, the space expansion function, and the HP shift prevention function can be achieved simultaneously.
- the front portion 2 f of the seat cushion 2 is provided with the low rigidity region PSc that is more flexible than the rear portion 2 g which is the high rigidity region PHc.
- the base side of the thigh is firmly supported, and the front of the thigh is flexibly supported by the low rigidity region PSc, so that a good seating feeling can be obtained.
- the feeling of pressure on the lower back and knee soles of the seated person D is reduced, the seated person can obtain a comfortable sitting feeling.
- FIGS. 4 to 8 A rear seat vehicle seat 1 according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 8.
- the present embodiment is an example in which the rigidity distribution described below is given to the seat back 3 in the vehicle seat 1 of the first embodiment.
- the support reaction force fa 1 of the seated person D has been set a small low rigidity region PSb.
- the support reaction force is a force that the seated person D receives from the surface (e.g., the back surface 3a) on which the seated person D is supported.
- the supporting reaction force can be determined based on, for example, the maximum deformation amount (sinking amount) of the support surface when the pressing surface having a predetermined shape and size is pressed against the support surface with a predetermined pressure.
- the support reaction force of the support surface X is supported It is said that it is smaller than the support reaction force of surface Y.
- the support reaction force fa 2 of the seated person D is in the low rigidity region PSb adjacent to the low rigidity region PSb in the vertical direction and on the upper and lower portions of the seat back 3.
- the high stiffness regions PHb 1 and PHb 2 larger than the support reaction force fa 1 are set, and a stiffness distribution having different reaction force characteristics in the vertical direction of the seat back 3 is given.
- the high rigidity regions PHb 1 and PHb 2 have a small amount of sinking due to elastic deformation when the seated person D leans on the backrest surface 3 a of the seat back 3 and elastically supports the corresponding portion of the seated person D firmly It is desirable to have a standard spring constant, which is typically required for a vehicle seat back.
- the low rigidity region PSb is set to an appropriate spring constant that can be elastically deformed and sink relatively softly against the back load acting on the seat back 3.
- the backrest load is a load applied from the back of the seated person D to the backrest surface 3a of the seatback 3 when sitting.
- the backrest surface 3a of the seatback 3 is made into a shallow V shape in a side view, for example, at various bending angles starting from the low rigidity region PSb described above according to the backrest load of the seated person D It is possible to break in the middle.
- the high-rigidity region PHb 1 of the upper portion of the seat back 3 substantially is formed to correspond to the chest Da of the seated person D, seating the high rigidity region PHb 2 of lower portion It is formed corresponding approximately to the pelvis Dc of the person D.
- the low rigidity region PSb of the vertical middle portion of the seat back 3 is centered on the joint between the thorax Da and the lumbar region Db of the seated person D, that is, a region corresponding to the 10th thoracic vertebra Da 1 to 12 th thoracic vertebra Da 2 As it is, it is formed to have a required upper and lower width dimension.
- the low rigidity region PSb against the backrest load, as break points BP in the vertical direction center position PS 0 low rigidity region PSb, it has become deformable bending medium is backrest surface 3a.
- the support reaction force fa (fa 1 , fa 2 from the center to the lower end portion of the backrest surface 3a Becomes larger downward, thereby emphasizing and supporting the pelvis Dc.
- the support reaction force fa (fa 1 , fa 2 ) becomes larger as it goes upward, whereby the thorax Da can be firmly supported.
- FIG. 6 shows the structure of the seat back 3 as a cross-sectional view in (A) and the structure of a seat back frame forming a framework of the seat back 3 as a perspective view in (B).
- the seat back 3 includes a seat back frame 11, a cushion pad 15, and a pad support member 16 for supporting the cushion pad 15 on the seat back frame 11 on the back side.
- the seat back frame 11 includes a pair of left and right side frames 12, an upper frame 13 made of a pipe material connecting their upper ends, and a lower frame 14 connecting lower ends.
- the cushion pad 15 is made of, for example, an elastic material of a required thickness made of, for example, urethane foam, for elastically supporting the seated person D, and as shown in FIG. It is disposed over the whole.
- the cushion pad 15 has a groove that extends in the vehicle width direction at the vertical central portion (in this embodiment, the vertical central position PS 0 in the present embodiment) of the low rigidity region PSb and promotes the mid-folding of the cushion pad 15 15a is formed.
- groove 15a is provided on the front surface of the cushion pad 15 in the example shown in FIG. 6A, it may be provided on the back surface of the cushion pad 15 as shown by the dotted line in FIG. May be
- the pad support member 16 is configured of an upper pad support member 16U, a lower pad support member 16L, and a central pad support member 16C.
- the upper pad support member 16U supports the upper portion of the cushion pad 15 at a position corresponding to the chest Da of the seat occupant D.
- the lower pad support member 16L supports the lower portion of the cushion pad 15 at a position corresponding to the pelvis Dc of the seated person D.
- the central pad support member 16C supports the vertically central portion of the cushion pad 15 at a position corresponding to the vicinity of the joints between the chest Da and the lumbar portion Db of the seated person D.
- the mechanical properties of the pad support members 16U, 16L, and 16C are set to be hard and soft, thereby setting the high rigidity areas PHb 1 and PHb 2 and the low rigidity area PSb described above.
- the upper pad support member 16U is configured as a horizontally long box structure made of metal, which is joined to the front surface of the upper frame 13 along the vehicle width direction. Then, this box structure, by supporting the upper end rear of the cushion pad 15 at portions corresponding to the upper end of the rib cage Da of the seated person D, a large support reaction force fa 2 is to be obtained.
- the horizontal box structure 16U doubles as a mounting member for the headrest 4, and the left and right ends thereof are provided with stay insertion holes 17 penetrating in the vertical direction, through which the headrest stay is inserted.
- the lower pad support member 16L is formed of a metal rod having left and right end portions joined to front edge flanges of the left and right side frames 12, respectively. Then, this metal rod, by supporting the lower end rear of the cushion pad 15 at portions corresponding to the upper portion of the pelvis Dc of the seated person D, a large support reaction force fa 2 is to be obtained.
- the central pad support member 16C is formed of a metal S spring with the left and right end portions joined to the rear edge flanges or the front edge flanges of the left and right side frames 12.
- the S spring 16C is set to a desired small spring constant, by supporting the central part back of the cushion pad 15 in a slightly lower position of the groove portion 15a, a small support reaction force fa 1 is to be obtained.
- the vehicle seat 1 exhibits the functions described below.
- the seat back 3 with the support reaction force fa 1 of the seated person D in the vertical direction central portion to set a small low rigidity region PSb, adjacent to the low-rigidity area PSb sheet
- a small low rigidity region PSb adjacent to the low-rigidity area PSb sheet
- the backrest surface 3a of the seatback 3 can be bent at various bending angles starting from the low rigidity region PSb according to the backrest load of the seated person D.
- the support reaction force fa (fa 1 , fa 2 ) changes in accordance with the acting backrest load, so the bending angle of the backrest surface 3 a is It changes variously according to the physical constitution of the seating person D.
- the seated person D can either sit on the back surface 3a automatically, without requiring any special adjustment operation, by simply putting on the seat back 3, regardless of whether the seated person is a small or roughly sized person.
- the seat occupant D can be relieved of fatigue by being bent at a bending angle at which a comfortable posture that is most suitable for the physique of the person is obtained.
- the front portion 2f of the seat cushion 2 is the low rigidity region PSc, and the rear portion 2g is the high rigidity region PHc.
- the HP guiding function, the space enlarging function, and the HP deviation preventing function can be exhibited with respect to a series of actions when the seating person D described in the one embodiment is seated.
- the stiffness distribution including the high stiffness region PHb 1 -low stiffness region PSb-high stiffness region PHb 2 in which reaction force characteristics differ in the vertical direction of the seatback 3 Since the backrest surface 3a of the seatback 3 can be bent and deformed in accordance with the backrest load of the seat occupant D, the back of the seat occupant D who leans on the seatback 3 is convex rearward. As gently curved. Therefore, the seated person D can more easily move the hips backward to guide the hip point HP to the optimum position.
- the backrest surface 3a of the seatback 3 is a fold that provides a comfortable posture most suitable for the physique of the seated person D by the above-described automatic adjustment function of the fold angle. Since the seat D is bent at an angle, the seated person D can more easily move the hips backward regardless of the physical size to reliably guide the hip point HP to the optimum position.
- the position of the buttocks may be adjusted by pressing the back against the backrest 3a of the seatback 3 and holding the leg against the floor.
- the back of the seated person D is a reaction force from the high rigidity region PHb 1 of the upper portion of the backrest surface 3a will act, in the vehicle seat 1 according to the present embodiment, as described above, The rigidity distribution is applied to the seat back 3 so that the reaction force characteristics are different in the vertical direction, and the backrest surface 3a of the seatback 3 can be bent in response to the backrest load of the seated person D.
- a downward component is added to the reaction force acting on the back of the seated person D from the high rigidity area PHb 1 of Therefore, when adjusting the position of the buttocks, the seat occupant D can easily support his / her body with his back and legs, and the seat occupant D can more easily move the hip point HP to the optimum position.
- the back-folding surface 3a is bent at a larger bending angle than when the small-sized person is seated, so the back-folding surface 3a (in particular, the back-folding surface 3a In the upper and lower direction central portion (low rigidity region PSb)), a larger space is created in front of the Furthermore, in other words, the backrest surface 3a is an amount of bending deformation according to the physique of the seating person D (a bending deformation in the back of the seating person D who has moved backward with the movement of the buttocks on the seating surface 2a.
- the backrest surface 3a does not interfere with the backward movement of the buttocks, and the prompt backward movement of the buttocks It will be realized more reliably.
- the knee room of the seated person D can be secured earlier after seating, and a substantial knee room enlargement effect can be obtained more reliably.
- the backrest 3a of the seatback 3 can obtain a comfortable posture most suitable for the physique of the seated person D by the above-described automatic adjustment function of the center angle Bending deformation to the bending angle.
- the seated person D is in a comfortable posture that is most suitable for his / her physique only by drowning on the seat back 3. Therefore, regardless of whether the person is a large or small person, a wide space where the seated person D feels To expand.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and the resistance to backward movement of the seated person D on the seating surface 2a is reduced.
- the buttocks of the seated person D in the kneeling posture tend to slide more rearwardly, but in the vehicle seat 1 according to the present embodiment, as described above, the seated person on the lower side of the seat back 3 Since the support reaction force fa 2 of D sets a large high rigidity area PHb 2 , in this high rigidity area PHb 2 , the hips that are going to move further backward are more firmly received from the rear, and the hip point HP It is possible to more reliably prevent the misalignment of the
- the downward component acts to press the buttocks of the seated person D against the seating surface 2 a after seating, so that the positional deviation of the hip point HP after seating is more reliably prevented.
- the stiffness distribution with different reaction force characteristics in the vertical direction of the back 3 is given, and the back surface 3a of the seat back 3 is made at various bending angles starting from the low rigidity region PSb according to the back load of the seater D Since it is possible to be deformed in the middle, regardless of the physical size of the seater D, in the series of actions when the seater D is seated on the vehicle seat 1, the above three functions, ie HP guide function, space expansion Function and HP deviation It is possible to reliably achieve than the stop function at the same time.
- the vehicle seat 1 according to the present embodiment exhibits the function of improving the visibility outside the window described below and the function of improving the feeling of seating.
- the seater D of the vehicle seat 1 tends to use the seat back 3 more as it is about the size, and tends to use the seat back 3 as the person is smaller.
- the rigidity distribution including the high rigidity area PHb 1 -low rigidity area PSb-high rigidity area PHb 2 in which reaction force characteristics differ in the vertical direction of the seatback 3 The backrest surface 3a of the seatback 3 can be bent and deformed according to the backrest load of the seat occupant D. Therefore, when the small weight D1 sits down and raises the seat back 3, as shown in FIG.
- the amount of sinking in the central portion of the back surface 3a is small, and the bending angle is small.
- the heavyweight bodyweight D2 is seated and knocks down the seat back 3, as shown in FIG. 7B, the amount of sinking in the central portion of the backrest surface 3a is large, and the bending angle becomes large.
- the seat back 3 is turned over, the bending angle of the seat back 3 is increased and the chest Da of the seated person D rises at an appropriate angle, and when the seat back 3 is raised, the seat back 3 is broken
- the angle is reduced to prevent the chest Da of the seated person D from being excessively leaned forward. Therefore, according to the present embodiment, the chest Da of the seated person D can be raised at an appropriate angle according to the backward inclination angle of the seat back 3 (or the physique of the seated person D). It is possible to improve (front and side visibility).
- the seated person D when the seated person D is roughly a large-scaled person D2, when the tilting angle to the rear of the seat back 3 is large, the lower thigh back and knee sole seat cushions because the bending angle of the back surface 3a of the seat back 3 is large. It may come in contact with the front part 2f of 2 and may feel a feeling of pressure strongly.
- the front portion 2f of the seat cushion 2 is provided with the low rigidity region PSc that is more flexible than the rear portion 2g that is the high rigidity region PHc. Therefore, with the buttocks serving as the center of gravity of the seated person D as a focus, the base side of the thigh is firmly supported, and the front of the thigh is flexibly supported by the low rigidity region PSc to obtain a good seating feeling.
- the front portion 2f of the seat cushion 2 is a low rigidity region PSc, in the case of a small-scaled person, even from a large-sized person in some cases
- the front portion 2f of the seat cushion 2 is flexibly deformed with respect to the load to reduce a feeling of pressure.
- the lower thigh and the back of the knee due to the bending deformation of the optimum angle according to the physique of the seated person D of the backrest 3a of the seatback 3 and the flexible deformation of the front portion 2f of the seat cushion 2.
- the synergetic effect is obtained with the reduction of the feeling of oppression. That is, according to the present embodiment, a seated posture with a comfortable seating and comfortable seating posture can be obtained for both large and small seating persons, and fatigue can be reduced.
- vehicle seat 1 exhibits the functions described below.
- the low rigidity region PSb set at the central portion in the vertical direction of the seat back 3 is formed around the region substantially corresponding to the joints of the chest Da and the waist Db of the seated person D.
- vertical center position PS 0 of rigidity region PSb is, to substantially correspond to the joint of the rib cage Da and the waist Db of the seated person D, the backrest surface 3a crease deformed medium as break points BP here. Therefore, according to the present embodiment, it is possible to obtain a support form adapted to the human skeleton, realize a sitting posture in which the posture change of the seated person D is small, and the muscle burden is small, and exert the fatigue reduction effect. it can.
- the cushion pad 15 of the seat back 3 is provided with a groove 15a that extends in the vehicle width direction at the vertical middle of the low rigidity region PSb and promotes the mid-folding deformation of the cushion pad 15. Since the bending point BP of the backrest surface 3a is defined in the groove 15a, the centering deformation of the backrest surface 3a can be stably performed.
- the seat back 3 includes the pad support member 16 for supporting the cushion pad 15 on the back surface side to the seat back frame 11, and the high rigidity regions PHb 1 and PHb 2 of the seat back 3 are low.
- the rigid region PSb is set by making the mechanical properties of the pad support member 16 different from each other by rigidity or softness. Therefore, the rigidity adjustment of each area can be easily adjusted according to the request.
- the upper pad support member 16U is a metal box structure, that is, a rigid structure. Therefore, the high rigidity region PHb 1 by setting the spring constant of the cushion pad 15 itself can be a firmly supportable suitable rigid thoracic Da. Further, in the present embodiment, a metal rod is used as the lower pad support member 16L, and an S spring is used as the central pad support member 16C. Therefore, by appropriately setting the spring constant by selecting the wire diameter, material and the like, the high rigidity region PHb 2 and the low rigidity region PSb are respectively suitable for supporting the pelvis Dc, supporting the waist Db, and bending in the middle Rigidity can be easily adjusted.
- break point BP of the back surface 3a of the seat back 3 is determined based on the standard physical size of the seated person, it is shown in FIG. 7 (B) when the seated person is roughly D2 Thus, it is also conceivable that the joint positions of the thorax Da and the lumbar region Db shift upward above the break point BP.
- the hardness of the cushion pad immediately below the hip point HP of the seat cushion 2 may be set to an appropriate hardness. That is, the amount of sinking under the hip point HP is large when a large-sized person is seated, and the amount of sinking under the hip point HP may be small when a small-sized person is seated.
- FIG. 8 shows an example of adjusting the hardness under the hip point HP of the seat cushion 2.
- the void 51 such as the hollow 51A or the plurality of longitudinal slits 51B is provided on the surface of the pad material 41A opposite to the seating surface of the hip point HP.
- the gap 51 makes the hip point HP below large when a large-sized person is seated, and small when the small-sized person is seated so that it can sink and deform, and the chest Da and the lumbar region Db produced by the body difference of the seated person To absorb the displacement of the joint position between
- FIG. 9 shows (A) the cross-sectional structure of the seat back 3 in the first modified example of the present embodiment, and (B) the structure of the seat back frame 11.
- an S spring is used in the same manner as the central pad support member 16C, instead of the metal rod in the second embodiment.
- the S spring 16L as the lower pad support member is set to a spring constant larger than that of the S spring 16C as the central pad support member so that the pelvis Dc of the seated person D can be firmly supported.
- the central pad support member 16C by using both S spring as the lower pad supporting member 16L, and the high rigidity region PHb 2 by selecting the standard S springs respective low rigidity region PSb It is possible to easily adjust the rigidity. Further, by configuring the lower pad support member 16L with the S spring, the support area of the portion corresponding to the pelvis Dc is expanded, and the change of the support reaction force from the low rigidity region PSb to the high rigidity region PHb 2 can be smoothed. The seating feeling can be improved.
- FIG. 10 shows the cross-sectional structure of the seat back 3 in the second modified example of the present embodiment in (A) and the structure of the seat back frame 11 in (B).
- a laterally long load receiving plate is used as the lower pad support member 16L instead of the metal rod in the second embodiment.
- the load receiving plate 16L is formed of a rigid plate such as a metal plate or a hard resin plate, and is connected to the left and right side frames 12 so as to be able to adjust the longitudinal position by rotating the actuator 18 or manually. There is.
- the seating area can be stabilized by expanding the support area of the portion corresponding to the pelvis Dc.
- the lower pad support member 16L is constituted by a load receiving plate made of metal or hard resin material, and by supporting the rear surface of the lower end portion of the cushion pad 15 with a wide area at a portion corresponding to the pelvis Dc of the seated person D, A large support reaction force fa 2 is obtained.
- FIG. 11 shows (A) the cross-sectional structure of the seatback 3 in the third modified example of the embodiment, and (B) the structure of the seatback frame 11.
- a metal elongated load receiving plate made of metal is used as the lower pad support member 16L instead of the metal rod in the second embodiment.
- the load receiving plate 16L is joined to the left and right side frames 12 by appropriately setting the amount of forward protrusion, while adjusting the thickness of the cushion pad 15 in the portion opposite to the high rigidity region PHb 2 Is the appropriate rigidity for supporting the pelvis Dc.
- the load receiving plate 16L is appropriately connected to the left and right side frames 12 by setting the amount of forward projection appropriately, thereby expanding the support area of the portion corresponding to the pelvis Dc and stabilizing the sitting posture it can be. in addition, it is possible to obtain a large support reaction force fa 2 with a simpler configuration.
- the upper and lower ends of the rigid rods 21 are connected to each other by the wire 23, and the upper and lower ends are connected to the adjacent side frames 12 by the connecting rods 24, respectively.
- the upper S spring 22U and the lower S spring 22L are disposed at positions respectively corresponding to the chest Da and the pelvis Dc of the seated person D.
- the two middle S springs 22C are positioned above and below the cushion pad 15 with the break point BP (groove portion 15a) at a position corresponding to the joints of the chest Da and the waist Db of the seated person D It is arranged.
- the upper and lower S springs 22U and 22L are set to required large spring constants capable of firmly supporting the thorax Da and pelvis Dc of the seat occupant D.
- the middle stage S spring 22C is set to a required small spring constant so that the cushion pad 15 can be bent and deformed centering on the groove portion 15a by the backrest load.
- the pad support member 16 is configured by the pair of left and right rigid rods 21 extending in the vertical direction and the plurality of S springs 22 bridged between the rigid rods 21 in the vertical direction in multiple stages. Since it has to, S springs 22U, 22C, by the arrangement adjustment selection and 22L of the spring constants, each region PHb 1, PSb, placement PHb 2, the adjustment of the rigidity can be easily performed. Furthermore, since the upper and lower end portions of the rigid rod 21 are connected to each other by the wire 23 and the upper and lower end portions are connected to the side frames 12 in the vicinity by the connecting rod 24, the rigid rod 21 and the connecting rod 24 are By adjusting the rigidity, it is possible to easily adjust the rigidity of the entire back surface 3a.
- the pad support member 16 includes a pair of left and right elastic rods 25 extending in the vertical direction, and upper, middle and lower sides of these elastic rods 25, 25 in the vicinity of each side. It comprises of a coil spring 26 supported on the frame 12.
- the pair of left and right elastic rods 25 are formed of an appropriate synthetic resin material so as to be flexibly bent and deformed by a backrest load, and are mutually connected by a plurality of wires 23 arranged in multiple stages in the vertical direction. The back surface of the pad 15 is supported.
- the upper coil spring 26U and the lower coil spring 26L are disposed at positions corresponding to the sides of the chest Da and the pelvis Dc of the seated person D.
- the middle coil spring 26C is disposed at a position corresponding to the side near the joint of the chest Da and the waist Db of the seated person D.
- the upper and lower coil springs 26U and 26L are set to a required large spring constant capable of firmly supporting the chest Da and the pelvis Dc of the seat occupant D.
- the elastic rod 25 is bent and deformed in a shallow V shape at the central portion due to the backrest load, and the required small spring so that the cushion pad 15 can be bent and deformed centering on the groove 15a. It is set to a constant.
- adjustment of the arrangement, rigidity, and the like of the regions PHb 1 , PSb, and PHb 2 is performed by setting the rigidity of the elastic rod 25 and selecting the spring constants of the coil springs 26U, 26C, and 26L. It can be done more easily.
- the pad support member 16 is constituted by a pair of upper and lower load receiving plates 27 and a connection plate 28 connecting the two.
- the upper load receiving plate 27U is pivotably connected to the left and right side frames 12 via the support shaft 29 in the front-rear direction at a position where the upper end thereof substantially corresponds to the upper end of the chest Da of the seated person D is there.
- the lower load receiving plate 27L has a lower end portion rotatably coupled to the left and right side frames 12 via the support shaft 29 in a longitudinal direction at a position substantially corresponding to the upper end portion of the pelvis Dc of the seated person D It is
- the load receiving plate 27 is configured as a rigid plate made of metal or hard synthetic resin, while the connection plate 28 is configured of a plate spring material.
- connection plate 28 is disposed at a position corresponding to the joints of the chest Da and the waist Db of the seated person D.
- the upper and lower load receiving plates 27U and 27L are pivoted in the direction of the arrow in FIG. 14 with the support shaft 29 as a fulcrum by backrest load so that the cushion pad 15 can be bent and deformed centering on the groove 15a.
- the required small spring constant is set.
- the pad support member 16 is composed of the upper and lower pair of load receiving plates 27 and the connection plate 28 connecting them, the bending moment caused by the backrest load is It is possible to concentrate on the connection plate 28 and to more reliably cause the centering deformation of the backrest surface 3a.
- the present invention is not limited to the cushion pad support structure shown in the above-described embodiment and each modification, and any cushion pad support structure that can obtain the rigidity distribution shown in FIG. 4 in the vertical direction of the seatback 3 Good.
- FIGS. 15 to 16 A rear seat vehicle seat 1 according to a third embodiment of the present invention will be described with reference to FIGS. 15 to 16.
- the present embodiment is an example in which a reaction force characteristic described below is imparted to the front portion 2 f of the seat cushion 2 in the vehicle seat 1 of the first embodiment.
- a seating reaction force fb is large with respect to a seating load acting from above, and a seating load acting from the front
- the reaction force characteristic with small supporting reaction force fc that is, the supporting reaction force fb with respect to the seating load acting from above is larger than the supporting reaction force fc with respect to the seating load acting from the front (fb> fc) It gives the characteristic.
- the seating load is a load applied to the seat cushion 2 at the time of seating from a part below the waist of the seated person D's body.
- FIG. 16 shows the front part structure of the seat cushion 2 of the present embodiment, with the skin material covering the cushion pad 41 removed for convenience.
- the seat cushion 2 includes a cushion pad 41 made of an elastic material such as urethane foam, and a seat cushion frame 47 such as a seat cushion pan supporting the cushion pad 41 and a seat cushion frame as shown in FIG. There is.
- the low rigidity region PSc of the front portion 2f of the seat cushion 2 is a portion (a thigh front back contact portion) PSc 1 contacting the thigh front back of the seated person D shown in FIG.
- a back contact portion) PSc 2 and a portion (lower leg back contact portion) PSc 3 in contact with the lower back of the lower leg are set.
- the supporting reaction force of the thigh front back contact portion PSc 1 , the knee back contact portion PSc 2 , and the lower thigh back contact portion PSc 3 is the thigh front back contact portion PSc 1 > the knee back contact portion PSc 2 > the lower thigh back contact portion It is set to be PSc 3 .
- a reaction force characteristic that the support reaction force fb is large with respect to the seating load acting from above and the support reaction force fc is small with respect to the seating load acting from the front is provided.
- a standard pad material 41A in which the cushion pad 41 is set to a required spring constant used for the high rigidity region PHc of the rear portion 2g of the seat cushion 2 and a low rigidity of the front portion 2f of the seat cushion 2 It comprises with pad material 41B used for field PSc.
- pad material 41B used for field PSc.
- a reaction force characteristic that is itself directional to the support reaction force for example, the upper support reaction force fb is larger than the front support reaction force fc (fb> fc) Force material
- the reaction force characteristics of such a pad material 42 can be easily set, for example, by adjusting the foam density in the layer of the pad material 42 or the like.
- the vehicle seat 1 has the front portion 2f of the seat cushion 2 as the low rigidity region PSc and the rear portion 2g as the high rigidity region PHc, as in the first embodiment. Similar to the first embodiment, the HP guiding function, the space enlarging function, and the HP deviation preventing function can be exhibited with respect to a series of actions when the seating person D described in the embodiment is seated.
- the support reaction force fb is large with respect to the seating load acting from above in the low rigidity region PSc of the seat cushion 2, and the support reaction against the seating load acting from the front Since the force fc imparts a small reaction force characteristic, even when the seating load acting from above is relatively large, such as when the seated person D is a large-scaled person, downward of the front portion 2f of the seat cushion 2 When the seated person D is a small person (or even a large person) while suppressing the amount of depression and supporting the front of the thigh more stably, contact with the knee or the lower leg
- the front portion 2 f can be flexibly deformed with respect to the front-side seating load due to the above, and the resistance to movement or turning on the seating surface 2 a of the seat occupant D can be reliably reduced.
- the support reaction force fb is large with respect to the seating load acting from above on the low rigidity region PSc of the seat cushion 2, and the seating load acting from the front On the other hand, the support reaction force fc gives a small reaction force characteristic.
- the foot portion can be reliably secured by flexibly deforming the front portion 2f with respect to the seating load acting from the front.
- the support reaction force fb is large with respect to the seating load acting from above on the low rigidity region PSc of the seat cushion 2, and the seating load acting from the front On the other hand, the support reaction force fc gives a small reaction force characteristic.
- the supporting reaction force fb is large relative to the seating load acting from above on the low rigidity region PSc of the seat cushion 2 Since the support reaction force fc has a small reaction force characteristic with respect to the seating load acting from the front, when the seated person D is seated on the vehicle seat 1 regardless of the physical size of the seated person D
- the above three functions namely, the HP guide function, the space expansion function, and the HP shift prevention function can be achieved simultaneously and more reliably.
- vehicle seat 1 exhibits the functions described below.
- the support reaction force fb is large with respect to the seating load acting from above in the low rigidity region PSc of the seat cushion 2,
- a comfortable seating posture with a comfortable feeling of seating stability and a comfortable sitting posture can be achieved for both large and small seating persons.
- even when the vehicle seat 1 is used as a driver's seat it is a matter of course that the same sense of seating stability and sitting comfort can be obtained. It does not affect the operation etc.
- the low rigidity region PSc of the seat cushion 2 is set to the thigh front back contact portion PSc 1 , the knee back contact portion PSc 2, and the lower leg back contact portion PSc 3. doing. Therefore, even if the seated person D is a small-scaled person, compression avoidance on the thigh front back, knee sole, and lower thigh is well performed and the seat cushion 2 is seated on the seat cushion 2 on the more rearward side of the seating surface 2a. Is possible.
- the femoral back contact portion PSc 1, knee back contact portion PSc 2, and the supporting reaction force of the lower leg back contact portion PSc 3 femoral back contact portion PSc 1 > knee back contact portion PSc 2> since the set to be lower leg back contact portion PSc 3, it is possible to provide a free seating feel discomfort to the occupant D in the gradual change of the support reaction force.
- a reaction force characteristic in which the support reaction force itself is directional (for example, the upper support reaction force fb is larger than the front support reaction force fc (fb Pad material 42 having a reaction force characteristic) is used.
- the thigh front back contact portion PSc 1 supports the thigh front with a large support reaction force fb
- the lower leg rear contact portion PSc 3 supports the small support reaction force fc that does not press the lower leg sole with only the pad material 42 can do.
- a support reaction force intermediate between the support reaction force fb and the support reaction force fc is generated with respect to the knee back load acting from a slightly obliquely upper front, and the knee back of the seated person D Can be supported without giving a feeling of oppression and compromising the support stability.
- the above-described reaction force characteristics can be obtained with a single pad member 42. Therefore, the increase in the number of parts and the number of assembling steps can be suppressed, which is advantageous in cost.
- FIG. 17 shows a first modification of the present embodiment.
- the pad member 41B used for the low rigidity region PSc is disposed at a portion corresponding to the pad member 43 disposed at a portion corresponding to the thigh front back contact portion PSc 1 and at a portion corresponding to the knee back contact portion PSc 2 .
- the pad material 44 and the pad material 45 disposed at a portion corresponding to the lower back contact portion PSc 3 are divided.
- Pad material 43 is set to a desired spring constant versus upper support reaction force fb is obtained, the pad member 45 is set to a desired spring constant versus forward support reaction force fc 1 is obtained.
- the front portion 2f of the seat cushion 2 corresponds to the thigh front back contact portion PSc 1 , the knee back contact portion PSc 2 and the lower leg back contact portion PSc 3 Since the pad members 43, 44 and 45 having different spring constants are used, in addition to the seating effect effect similar to that of the third embodiment, the thigh front and back of the seat occupant D, knee sole and lower thigh By appropriately selecting the pad materials 43, 44 and 45 having spring constants suitable for support, it is possible to obtain an effect that reaction force adjustment of each part of the low rigidity region PSc can be appropriately and easily performed.
- FIG. 18 shows a second modification of the present embodiment.
- the pad material (the pad material 43 in the first modification) used in the portion corresponding to the thigh front back contact portion PSc 1 is divided in the front and back direction, and the thigh front back contact portion
- the rear side pad member 43 a occupying the rear half of PSc 1 and the front side pad member 43 b adjacent to the pad members 44 and 45 are configured.
- Rear pad member 43a is set to a desired spring constant versus upper support reaction force fb 1 is obtained.
- the front side pad member 43b is a middle opposite upper support member between the upper side support reaction force fb 1 of the rear side pad member 43a and the front support reaction force fc 2 of the pad member 44 disposed in the knee back contact portion PSc 2.
- the force fb 2 is set to the required spring constant to be obtained.
- the pad material 43 used for the portion corresponding to the thigh front back contact portion PSc 1 is configured by the plurality of pad materials 43a and 43b divided in the front and rear direction, and disposed on the rear side Since the spring constant of the pad material 43a is set to be smaller than the spring constant of the pad material 43b disposed on the front side, in addition to the effect of the first modification, contact from the thigh front back contact portion PSc 1 to knee back contact is made. An effect is obtained that the change in the support reaction force to the portion PSc 2 can be made gentle, and the sitting feel of the seated person D from the front to the back of the thigh and the back of the knee can be made better.
- FIG. 19 shows a third modification of the present embodiment.
- a single pad material 46 uniformly foamed at a required density is used as the pad material 41 B used for the front portion 2 f of the seat cushion 2.
- the pad member 46 is set to a spring constant smaller than that of the pad member 41A used for the rear portion 2g of the seat cushion 2.
- a downward sloping downward inclined surface is formed at the front of the pad 41A, and a rear inclination of the pad 46 is inclined at the same angle as the front sloping surface of the pad 41A.
- An upward inclined surface is formed.
- the front inclined surface of the pad member 41A and the rear inclined surface of the pad member 46 face each other in an opposing manner.
- the thickness of the front portion of the pad member 41A is changed so as to become thinner toward the front, while the thickness of the rear portion of the pad member 46 goes to the rear It is configured to be changed so as to become thinner (so as to go downward).
- the femoral back contact portion PSc 1 the front portion of the thickness variation of the pad material 41A, then the side in pairs the upper support reaction force fb 1 is obtained, a small-to-upper support than in the front portion A reaction force fb 2 is obtained.
- the longitudinal direction of the thickness change of the rear portion of the pad member 46, the lower leg back contact portion PSc 3 in pairs front support reaction force fc 1 is obtained, slightly larger pair anterior support anti than the knee back contact portion PSc 2 Force fc 2 is obtained.
- the front portion 2f of the seat cushion 2 is configured using the pad member 46 having a smaller spring constant than the pad member 41A used for the rear portion 2g.
- the parting line PL where the pad material 46 of the rear part and the pad material 41A of the rear part 2g face and contact with each other is a rear with the boundary between the thigh back front contact part PSc 1 and the knee back contact part PSc 2 as a starting point.
- the reaction force characteristic of the low rigidity region PSc is obtained by inclining so as to become lower as it goes.
- the parting line PL is inclined so as to become lower toward the rear with the boundary between the thigh back front contact portion PSc 1 and the knee back contact portion PSc 2 as a substantially starting point, so that the thigh front back contact portion PSc Since the change in the supporting reaction force from 1 to the back knee contact portion PSc 2 can be made even more gradual, the sitting feel of the seated person D from the back front to the back of the thigh can be further improved, Sex effects can be further enhanced.
- the front portion 2f of the seat cushion 2 can be constituted by the single pad member 46, so that the above-mentioned reaction force characteristics of the low rigidity region PSc can be advantageously obtained in cost. .
- FIG. 20 shows a fourth modification of the present embodiment.
- a single pad material 46 similar to that of the third modification is used as the pad material 41B used for the low rigidity region PSc of the front portion 2f of the seat cushion 2.
- a load receiving member 48 projecting upward in the low rigidity region PSc is disposed at the front of the seat cushion frame member 47.
- the load receiving member 48 is formed of an appropriate synthetic resin material or a lightweight metal material in a substantially channel-shaped cross section, and disposed in the low rigidity region PSc in front of the boundary between the high rigidity region PHc and the low rigidity region PSc. is there.
- the upper wall and the front wall of the load receiving member 48 are formed as arbitrary inclined surfaces.
- the thickness of the pad material 46 on the upper surface side of the load receiving member 48 is adjusted by the inclination of the upper wall of the load receiving member 48.
- the thickness of the pad material 46 on the front side of the load receiving member 48 is adjusted by the inclination of the front wall of the load receiving member 48.
- the front portion 2f of the seat cushion 2 is configured using the pad member 46 having a smaller spring constant than the pad member 41A used for the rear portion 2g.
- a load receiving member 48 protruding upward in the low rigidity region PSc is disposed at the front, and the thickness of the pad material 46 of the front portion 2f of the seat cushion 2 is adjusted on the upper surface side and the front surface side of the load receiving member 48 The above-mentioned reaction force characteristic of the low rigidity region PSc is obtained.
- the thickness of the pad member 46 can be adjusted by appropriately adjusting the shape of the load receiving member 48, the thigh front back contact portion PSc 1 to the knee back contact portion It is possible to freely adjust the change in the support reaction force to PSc 2 and to make the sitting feel of the seated person D from the front to the back of the thigh to the back of the knee better.
- FIG. 21 shows a fifth modification of the present embodiment.
- a spring mechanism 49 that can be displaced back and forth with respect to a seating load acting from the front, that is, a load from the lower back is disposed.
- the spring mechanism 49 includes a movable plate 49a disposed opposite to the area of the lower back contact portion PSc 3 , an advancing and retracting guide 49b of the movable plate 49a provided on the front surface of the load receiving member 48, and a set spring 49c resiliently mounted therebetween. And have.
- the front portion 2f of the seat cushion 2 is configured using the pad member 46 having a smaller spring constant than the pad member 41A used for the rear portion 2g.
- a load receiving member 48 protruding upward in the low rigidity region PSc is disposed at the front, and the thickness of the pad material 46 of the front portion 2f of the seat cushion 2 is adjusted on the upper surface side and the front surface side of the load receiving member 48
- a spring mechanism 49 is provided on the front surface of the load receiving member 48 so as to be able to retract and move with respect to a seating load acting from the front, to obtain the above-mentioned reaction force characteristics of the low rigidity region PSc.
- the fifth modification by appropriately adjusting the spring constant of the spring mechanism 49, it is possible to obtain a support reaction force larger than the support reaction force obtained by simply adjusting the thickness of the pad member 46. since, it can be further freely set the change of the supporting reaction force from the anterior thigh back contact portion PSc 1 toward the knee back contact portion PSc 2.
- FIG. 22 and 23 show another modification of the cushion pad 41.
- each of the modifications shown in FIGS. 22 and 23 uses, as the cushion pad 41, a single pad member 41A set to a standard required spring constant required for the general vehicle seat cushion. . Then, a gap 50 is provided in the front part of the pad member 41A, a low rigidity area PSc is formed in the front part 2f of the seat cushion 2, and the rear part 2g is made a high rigidity area PHc.
- a plurality of longitudinal slits 50A extending in the vehicle width direction are provided in the region of the lower thigh contact portion PSc 3 of the pad member 41A in the front-rear direction, and the front portion of the pad member 41A is
- the low rigidity region PSc is configured by reducing the hardness of
- the longitudinal slits 50A change the hardness of the pad member 41A in the vertical direction and in the front-rear direction by adjusting their length, vertical position, and the like.
- the length, vertical position, etc. of the longitudinal slit 50A are adjusted, and the anti-front supporting reaction force fc 1 is obtained in the lower back contact portion PSc 3 and is more than in the knee back contact portion PSc 2 A slightly larger front support reaction force fc 2 is obtained.
- the vertical slits 50A and is present to the front of the pad material middle layer of the anterior thigh back contact portion PSc 1.
- the femoral back contact portion PSc 1 pair upper support reaction force fb 1 uniquely determined by the spring constant of the pad member 41A at the rear side are obtained, slightly smaller pair upper support reaction force than the front side It is made to obtain fb 2 .
- the sixth modification by providing a plurality of longitudinal slits 50A extending in the vehicle width direction in the region of the lower thigh back contact portion PSc 3 of the pad member 41A in the longitudinal direction, weight reduction of the seat cushion 2 is achieved. It is possible to further smooth the change of the supporting reaction force from the thigh front back contact portion PSc 1 to the knee back contact portion PSc 2 while planning. Further, in the present modification, since the cushion pad 41 can be formed of a single pad member 41A, the reaction force characteristic can be advantageously obtained in cost.
- a cavity 50B is provided in the vehicle width direction in the region of the lower thigh back contact portion PSc 3 of the pad member 41A to reduce the hardness of the front portion of the pad member 41A.
- the low rigidity region PSc is configured.
- the hollow 50B changes the hardness of the pad material 41A in the vertical direction and in the front-rear direction by adjusting the cross-sectional shape, the cross-sectional area, the vertical and front-rear direction positions, and the like.
- the cross sectional shape, cross sectional area, vertical and longitudinal direction positions, etc. of the cavity 50B are adjusted to obtain the upper support reaction force fb 1 and fb 2 at the thigh front back contact portion PSc 1 , and the lower leg
- the front supporting reaction forces fc 1 and fc 2 can be obtained by the back contact portion PSc 3 and the knee back contact portion PSc 2 .
- the cavity 50B is provided in the vehicle width direction in the area of the lower thigh back contact portion PSc 3 of the pad member 41A, the weight reduction of the seat cushion 2 is further achieved. Reaction force characteristics can be obtained. Moreover, since the cushion pad 41 can be comprised with the single pad material 41A also in this modification, the said reaction force characteristic can be advantageously obtained in cost.
- the structure of a cushion pad is not limited to the example shown to this embodiment and each modification.
- the structure of the cushion pad has a reaction force characteristic such that the low rigidity region PSc exists in the front portion 2f of the seat cushion 2 and the support reaction force is large in the vertical direction and small in the front and rear direction. It may be any configuration that can be obtained.
- the seat cushion 2 is configured using a single pad member 41A, and the air gap 50 (50A, 50B) is provided in the front portion of the pad member 41A. Since the low-rigidity area PSc of the cushion 2 is formed and the above-mentioned reaction force characteristic in the low-rigidity area PSc is obtained, the cross-sectional shape, cross-sectional area, vertical and longitudinal positions, etc. of the air gap 50 provided in the pad material 41A. by appropriately adjusting the change in the supporting reaction force from the anterior thigh back contact portion PSc 1 toward the knee back contact portion PSc 2 can be more freely set.
- FIG. 24 A rear seat vehicle seat 1 according to a fourth embodiment of the present invention will be described with reference to FIGS. 24 to 25.
- FIG. 24 A rear seat vehicle seat 1 according to a fourth embodiment of the present invention will be described with reference to FIGS. 24 to 25.
- FIG. 24 A rear seat vehicle seat 1 according to a fourth embodiment of the present invention will be described with reference to FIGS. 24 to 25.
- FIG. 24 A rear seat vehicle seat 1 according to a fourth embodiment of the present invention will be described with reference to FIGS. 24 to 25.
- the front portion 2f of the seat cushion 2 is a low rigidity region PSc, and the rear portion 2g is a high rigidity region PHc.
- the support reaction force fb is large with respect to the seating load acting from above in the low rigidity region PSc, and the support reaction force fc with respect to the seating load acting from the front Gives a small reaction force characteristic.
- the seat back 3 has a low rigidity region PSb in which the support reaction force fa 1 of the seated person D is small, at the center in the vertical direction as in the second embodiment. , adjacent to the vertical direction of the low rigidity region PSb, support reaction force fa 2 of the seated person D into an upper portion and a lower portion of the seat back 3 is set large high rigidity region PHb 1, PHb 2, A stiffness distribution in which reaction force characteristics differ in the vertical direction of the seat back 3 is given.
- the backrest surface 3a of the seatback 3 is made into a shallow V shape in a side view, for example, at various bending angles starting from the low rigidity region PSb described above according to the backrest load of the seated person D It is possible to break in the middle.
- the high-rigidity region PHb 1 of the upper portion of the seat back 3 substantially is formed to correspond to the chest Da of the seated person D, seating the high rigidity region PHb 2 of lower portion It is formed corresponding approximately to the pelvis Dc of the person D.
- the low rigidity region PSb of the seatback center section, the joint of the rib cage Da and the waist Db of the seated person D i.e., around a portion corresponding to the vicinity of the 10th thoracic vertebra Da 1 of the twelfth thoracic vertebra Da 2, the required It is formed to have upper and lower width dimensions.
- the low rigidity region PSb against the backrest load, as break points BP in the vertical direction center position PS 0 low rigidity region PSb, it has become deformable bending medium is backrest surface 3a.
- the support reaction force fa (fa 1 , fa 2 from the center to the lower end portion of the backrest surface 3a Becomes larger downward, thereby emphasizing and supporting the pelvis Dc.
- the support reaction force fa (fa 1 , fa 2 ) becomes larger as it goes upward, whereby the thorax Da can be firmly supported.
- the rigidity distribution in the second embodiment is imparted to the seat back 3 in the vehicle seat 1 of the first embodiment, and the front portion 2 f of the seat cushion 2 is opposite to the third embodiment. It is an example which gave force characteristics.
- the vehicle seat 1 has the front portion 2f of the seat cushion 2 as the low rigidity region PSc and the rear portion 2g as the high rigidity region PHc, as in the first embodiment. Similar to the first embodiment, the HP guiding function, the space enlarging function, and the HP deviation preventing function can be exhibited with respect to a series of actions when the seating person D described in the embodiment is seated.
- the front portion 2f of the seat cushion 2 is the low rigidity region PSc and the rear portion 2g is the high rigidity region PHc. Therefore, as in the first embodiment, a series of operations performed by the seat occupant D between getting in the rear seat and completing the direction change (in particular, backward movement and direction of the seat occupant D on the seat cushion 2) It is possible to easily guide the seated person's hip point HP to the optimum position by suppressing the resistance to the conversion).
- the support reaction force fb is large with respect to the seating load acting from above on the low rigidity region PSc of the seat cushion 2, and the support reaction against the seating load acting from the front
- the force fc gives a small reaction force characteristic.
- the amount of sinking of the front portion 2f of the seat cushion 2 downward is suppressed to reduce the thigh front
- the front part 2f against the seating load from the front by the contact of the knee or the lower leg can be flexibly deformed to reliably reduce the resistance to movement or turning on the seating surface 2 a of the seat occupant D.
- the stiffness distribution including the high stiffness region PHb 1 -low stiffness region PSb-high stiffness region PHb 2 in which reaction force characteristics differ in the vertical direction of the seatback 3 Since the backrest surface 3a of the seatback 3 can be bent and deformed in accordance with the backrest load of the seat occupant D, the back of the seat occupant D who leans on the seatback 3 is convex rearward. As gently curved. Therefore, the seated person D can more easily move the hips backward to guide the hip point HP to the optimum position.
- the backrest surface 3a of the seatback 3 is most suitable for the physique of the seated person D by the automatic adjustment function of the bending angle described in the second embodiment.
- the seater D can move the buttocks more easily backward to reliably guide the hip point HP to the optimum position, regardless of the physical size, because the seater D is deformed to the middle angle at which the vehicle is obtained. .
- the position of the buttocks may be adjusted by pressing the back against the backrest 3a of the seatback 3 and holding the leg against the floor.
- the back of the seated person D is a reaction force from the high rigidity region PHb 1 of the upper portion of the backrest surface 3a will act, in the vehicle seat 1 according to the present embodiment, as described above, The rigidity distribution is applied to the seat back 3 so that the reaction force characteristics are different in the vertical direction, and the backrest surface 3a of the seatback 3 can be bent in response to the backrest load of the seated person D.
- a downward component is added to the reaction force acting on the back of the seated person D from the high rigidity area PHb 1 of Therefore, when adjusting the position of the buttocks, the seat occupant D can easily support his / her body with his back and legs, and the seat occupant D can more easily move the hip point HP to the optimum position.
- the vehicle seat 1 As described above, the vehicle seat 1 according to the present embodiment appropriately copes with the physical size of the seated person D, thereby providing the HP guide function in a series of actions when the seated person D sits on the vehicle seat 1. It can be achieved more reliably.
- the low rigidity region PSc is provided in the front portion 2f of the seat cushion 2, and the load in the low rigidity region PSc is relatively small.
- the seat occupant D can position the buttocks more rearward than the seating surface 2a, and the substantial foot space of the vehicle seat 1 is expanded.
- the seated person D reduces the load on the buttocks by pressing the back against the back surface 3a of the seat back 3 while stretching the leg against the floor surface.
- the position of the point HP may be shifted, in the vehicle seat 1 according to the present embodiment, the low rigidity region PSc is provided in the front portion 2f of the seat cushion 2, and the low rigidity region PSc has a relatively small load. Because the seat occupant D deforms, the seater D can easily extend the leg even when the leg is stretched.
- the support reaction force fb is large with respect to the seating load acting from above in the low rigidity region PSc of the seat cushion 2, and the support reaction against the seating load acting from the front
- the force fc gives a small reaction force characteristic. Therefore, even when the seating load acting from above is relatively large, such as when the seating person D is a large-scaled person, the amount of sinking of the front portion 2f of the seat cushion 2 downward is suppressed to reduce the thigh front When the seated person D is a small-scaled person, while supporting more stably, it is possible to flexibly deform the front portion 2f with respect to a seating load acting from the front, and secure a foot space.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2 and the resistance to the rearward movement of the seated person D is suppressed.
- the buttocks are promptly guided rearward along the seating surface 2a, and the seated person D is promptly guided to the kneeling posture.
- the knee room ahead of the knees of the seated person D is secured early after sitting, and substantially the same effect as when the knee room is enlarged can be obtained.
- the backrest surface 3a of the seatback 3 corresponds to the backrest load of the seated person D Since the bending deformation is possible, the size of the space in front of the backrest surface 3a can be automatically changed according to the physical constitution of the seated person D. In other words, the backrest surface 3a receives the back of the seated person D who has moved backward along with the movement of the buttocks on the seating surface 2a by the amount of centering deformation according to the physique of the seated person D.
- the backrest surface 3a does not interfere with the backward movement of the buttocks, and the prompt backward movement of the buttocks It will be realized more reliably.
- the knee room of the seated person D can be secured earlier after seating, and a substantial knee room enlargement effect can be obtained more reliably.
- the backrest surface 3a of the seat back 3 is most suitable for the physique of the seated person D by the automatic adjustment function of the bending angle described in the second embodiment. It bends and deforms to a bending angle at which a comfortable posture can be obtained. As a result, the seated person D is in a comfortable posture that is most suitable for his / her physique only by drowning on the seat back 3. Therefore, regardless of whether the person is a large or small person, a wide space where the seated person D feels To expand.
- the vehicle seat 1 As described above, the vehicle seat 1 according to the present embodiment appropriately copes with the physical size of the seated person D to provide a space expanding function in a series of actions when the seated person D sits on the vehicle seat 1. It can be achieved more reliably.
- the front portion 2f of the seat cushion 2 is set as the low rigidity region PSc, and the rear portion 2g is set as the high rigidity region PHc, as in the first embodiment. Because the rigidity of the cushion pad is relatively high, the load applied from the seated person D to the seating surface 2a fluctuates due to the movement of the seated person D himself or the vibration of the vehicle generated along with traveling. Even in this case, the variation in the amount of depression of the cushion pad is suppressed. Thereby, the displacement of the hip point HP is more reliably prevented.
- the vehicle seat 1 In addition, while sitting on the vehicle seat 1, the seated person D is in the knee-standing position, and the center of gravity is closer to the rear, so the buttocks of the seated person D tend to slide more rearward.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and the resistance to backward movement of the seated person D on the seating surface 2a is reduced. Therefore, the buttocks of the seated person D can be more easily slid rearward.
- the vehicle seat 1 according to the present embodiment is provided with the seat back 3, and the seat back 3 is used to receive from the rear the buttocks that are going to move further rearward.
- the support reaction force fa 2 of the seated person D sets a large high rigidity area PHb 2 at the lower side of the seatback 3.
- the buttocks can be more firmly received from the rear, and displacement of the hip point HP can be more reliably prevented.
- the support reaction force fb is large with respect to the seating load acting from above in the low rigidity region PSc of the seat cushion 2, and the support reaction against the seating load acting from the front
- the force fc gives a small reaction force characteristic. Therefore, even when the seating load acting from above is relatively large, such as when the seating person D is a large-scaled person, the amount of sinking of the front portion 2f of the seat cushion 2 downward is suppressed to reduce the thigh front When the seated person D is a small-scaled person while supporting more stably, the reaction force against the seating load acting from the front can be reduced, and the positional deviation of the hip point HP can be further reliably prevented.
- a rearward inclined surface is formed on the front side of the area directly below the buttocks due to the load at the time of seating.
- a maximum deformation portion LP is provided between the back surface 3 a of the back 3 and the back 3. Since the vehicle seat 1 according to the present embodiment supports the pelvis Dc of the seated person D at the maximum deformation portion LP, the pelvis Dc is stably held in a fixed posture. Thereby, the positional deviation of the hip point HP is more reliably prevented.
- the downward component acts to press the buttocks of the seated person D against the seating surface 2 a after seating, so that the positional deviation of the hip point HP after seating is more reliably prevented.
- the vehicle seat 1 appropriately copes with the physical size of the seated person D, thereby preventing the HP deviation in a series of actions when the seated person D sits on the vehicle seat 1 Can be achieved more reliably.
- the stiffness distribution with different reaction force characteristics in the vertical direction of the back 3 is given, and the back surface 3a of the seat back 3 is made at various bending angles starting from the low rigidity region PSb according to the back load of the seater D
- the support reaction force fb is large with respect to the seating load acting from above, and the support reaction force fc is small with respect to the seating load acting from the front.
- Reaction force characteristics Therefore, regardless of the physical size of the seated person D, HP appropriately responds to the physical size of the seated person D, whereby the HP in a series of actions when the seated person D sits on the vehicle seat 1
- the guide function, the space expansion function, and the HP shift prevention function can be achieved more reliably at the same time.
- the fourth embodiment since it has the same configuration as the first to third embodiments, the operation and effect of the first to third embodiments described above, such as an automatic adjustment mechanism of the bending angle of the seatback and the like It goes without saying that the same function and effect can be obtained, but here the explanation is omitted in order to avoid redundancy.
- the seat cushion 2 and / or the seat back 3 with a predetermined rigidity distribution, the HP guiding function, the space enlarging function, and the HP in a series of actions when the seated person D sits on the vehicle seat 1
- a predetermined rigidity distribution is given to the seat cushion 2 and / or the seat back 3 and other mechanical properties (stiffness and friction coefficient) of the seat cushion 2 and / or the seat back 3 Can be realized by adjusting the shape, etc.).
- the front portion 2f of the seat cushion 2 is set as the low rigidity region PSc, and the rear portion 2g is set as the high rigidity region PHc.
- Other mechanical properties may be adjusted.
- the seating surface 2a of the seat cushion 2 may be set so that at least one of the rigidity, the coefficient of friction, or the shape differs between adjacent portions on the seating surface 2a.
- the backrest surface 3a of the seatback 3 may be set so that at least one of the rigidity, the friction coefficient, or the shape differs between adjacent portions on the backrest surface 3a.
- the contact area of the seating surface 2a and / or the backrest surface 3a with the seated person D is seated while the contact area is continuously changed along with a series of operations when the seated person D is seated on the vehicle seat 1 It moves on the surface 2a and / or the back surface 3a. Therefore, if the mechanical properties of the seating surface 2a and / or the backrest surface 3a are set to be different between adjacent portions on the seating surface 2a and / or the backrest surface 3a, for example, seating from the contact area Since the force acting on the person D can be changed continuously or stepwise along with the series of movements of the seater D, the feeling at the time of sitting can be improved.
- the buttocks of the seating person D are on the seating surface 2a. While the vehicle seat 1 is moving in the front-rear direction, that is, while the vehicle seat 1 exerts the above-described HP guide function, the feel received by the seated person D can be further improved.
- the seat occupant D can set the seat back 3 by changing the mechanical properties of the backrest surface 3a so as to change continuously or stepwise between the parts adjacent in the vertical direction on the backrest surface 3a.
- the feel received by the seat occupant D can be further improved.
- the mechanical properties of the seating surface 2a and / or the backrest surface 3a are set to change continuously or stepwise between the portions adjacent to the seating surface 2a and / or the backrest surface 3a in the lateral direction. You may In this way, it is possible to adjust the holdability of the buttocks and the chest Da while further improving the feeling at the time of sitting.
- the mechanical properties of the seat cushion 2 and / or the seat back 3 include, for example, the following items to be adjusted.
- A) Providing the seat cushion 2 with a stiffness distribution in the front-rear direction by making the stiffness or reaction force characteristics of portions (front, center, rear, etc.) adjacent to each other in the front-rear direction of the seat cushion 2 different from each other .
- B) By making rigidity or reaction force characteristics of portions (upper part, central part, lower part, etc.) adjacent to each other in the vertical direction of the seat back 3 different from each other, rigidity distribution in the vertical direction is given to the seat back 3.
- each of the items (a) to (f) is applied one by one.
- it is also possible to apply three items of each of the items (a) to (f) in combination and there are twenty examples in all.
- There are a total of 15 examples in which four of the items (a) to (f) are combined and applied and a total of six examples in which five items are combined and applied.
- the third embodiment is an example in which (a) is applied after the front portion 2f of the seat cushion 2 is set as the low rigidity region PSc and the rear portion 2g is set as the high rigidity region PHc. Further, examples in which (a) and (b) are combined and applied to the rigidity distribution of the seat cushion 2 are the second and fourth embodiments.
- the front portion 2f of the seat cushion 2 is set as the low rigidity region PSc, and the rear portion 2g is set as the high rigidity region PHc as a representative of the remaining combination examples among the 63 types (e) (or ( An example to which f) is applied will be described as a fifth embodiment. Further, an example in which (c) is applied to the rigidity distribution of the seat cushion 2 in combination is applied as a sixth embodiment, and an example in which (c) and (d) are applied in combination is described as a modification of the sixth embodiment. Do.
- a rear seat vehicle seat 1 according to a fifth embodiment of the present invention will be described with reference to FIG. 26 to FIG.
- the present embodiment is an example in which an inclined surface 71 described below is provided on the vehicle seat 1 of the first embodiment.
- the buttocks of the seated person D are in the corner area ⁇ where the seating surface 2a of the seat cushion 2 and the backrest surface 3a of the seatback 3 are connected. It has an inclined surface 71 to support.
- Intersection A between the seating surface 2a of the inclined surface 71 and the seat cushion 2, as shown in FIGS. 26 and 27, are set slightly rearward position than the ischial tuberosity Dc 1 in the pelvis Dc of the seated person D.
- an intersection point B between the inclined surface 71 and the backrest surface 3 a of the seat back 3 is set at a position corresponding to the vicinity of the sacrum Dc 2 in the pelvis Dc of the seated person D. Specifically, as shown in FIG.
- the distance ⁇ 1 from the intersection C of the extension line of the seating surface 2 a to the extension line of the back surface 3 a in the side view of the corner region ⁇ is the intersection point C it is preferred that the length 1/6 less than the value of L 1 to the front end of the seat cushion 2 and ( ⁇ 1 ⁇ L 1/6 ) to the.
- the distance [delta] 2 from the intersection C to the intersection B is preferably from the intersection C 1/5 less than the value of the length L 2 to the upper end of the seat back 3 and ( ⁇ 2 ⁇ L 2/5 ).
- the inclination angle ⁇ 1 of the inclined surface 71 (the angle formed by the inclined surface 71 with respect to the horizontal plane) is the inclination angle ⁇ 2 of the backrest surface 3a (with the backrest surface 3a with respect to the horizontal surface).
- Angle is set smaller than
- the vehicle seat 1 has the front portion 2f of the seat cushion 2 as the low rigidity region PSc and the rear portion 2g as the high rigidity region PHc, as in the first embodiment. Similar to the first embodiment, the HP guiding function, the space enlarging function, and the HP deviation preventing function can be exhibited with respect to a series of actions when the seating person D described in the embodiment is seated.
- the buttocks contact the inclined surface 71 of the corner region ⁇ , and the buttocks of the seated person D are guided to the optimum position by the inclined surface 71. Ru.
- the corner area ⁇ includes the inclined surface 71 for supporting the buttocks of the seated person D, and the inclined surface 71 corresponds to the back of the pelvis Dc of the seated person D.
- the buttocks of the seated person D move forward and the sitting posture collapses and the knee room in front of the knees is narrowed.
- the knee room ahead of the knee is restricted narrowly, but the knee room can be widely secured by this forward shift suppressing effect, and at the same time a comfortable sitting posture of the seated person D is obtained. D fatigue can be reduced.
- the high rigidity region PHc is provided in the rear portion 2g of the seat cushion 2, and the resistance to backward movement of the seated person D on the seating surface 2a is reduced.
- the vehicle seat 1 according to the present embodiment is an inclined surface that supports the buttocks of the seated person D in the corner region ⁇ . 71 is provided, and this inclined surface 71 can receive the entire pelvis Dc of the buttocks to be moved further backward from the back and can support it firmly, so that the displacement of the hip point HP is further assured To prevent.
- a rearward inclined surface is formed on the front side of the area directly below the buttocks due to the load at the time of seating.
- a maximum deformation portion LP is provided between the back surface 3 a of the back 3 and the back 3.
- the vehicle seat 1 according to the present embodiment includes the inclined surface 71 for supporting the buttocks of the seated person D in the corner region ⁇ , and the pelvis of the seated person D is made up of the inclined surface 71 and the maximum deformation portion LP. Since the Dc is supported, the pelvis Dc is stably held at a fixed posture. Thereby, the positional deviation of the hip point HP is more reliably prevented.
- the intersection point A between the inclined surface 71 and the seating surface 2 a of the seat cushion 2 is set to a position slightly behind the ischial tuberosity Dc 1 in the pelvis Dc of the seated person D. It is possible to prevent the buttocks of the seated person D from being pushed forward by the surface 71.
- the intersection B of the inclined surface 71 with the backrest 3a of the seat back 3 is set at a position corresponding to the vicinity of the sacrum Dc 2 in the pelvis Dc of the seated person D. Can be firmly supported. As a result, the effect of suppressing the forward shift movement of the buttocks of the seated person D can be enhanced, and collapse of the sitting posture can be more reliably prevented.
- the inclination angle of the inclined surface 71 is set smaller than the inclination angle of the backrest surface 3a. Therefore, the inclined surface 71 reliably acts on the pelvis Dc, and the pelvis Dc of the seated person D slightly reverses. Maintained in the same posture. As a result, a comfortable sitting posture of the seated person D can be obtained, and fatigue of the seated person D can be reduced.
- the vehicle seat 1 of the fifth embodiment in addition to the configuration of the first embodiment, in the corner region ⁇ where the seating surface 2a of the seat cushion 2 and the backrest 3a of the seatback 3 described above are connected. Since the inclined surface 71 for supporting the buttocks of the seated person D is provided, the guiding function to the optimum position of the buttocks of the seated person D and the forward shift suppressing function by the pelvis support are more effectively exhibited. In the series of actions when the seated person D sits on the vehicle seat 1, the HP guide function, the space enlargement function, and the HP deviation prevention function can be achieved more reliably.
- the inclined surface 71 for supporting the buttocks of the seated person D is provided in the corner region ⁇ , the inclined surface 71
- the forward shift movement suppression function by the pelvis support can reduce the collapse of the posture of the seated person D, realize a stable seating posture, and obtain a good fatigue reduction effect.
- FIG. 28 shows a first modification of the present embodiment.
- the present modification is an example in which the inclined surface 71 of the present embodiment is adopted in the fourth embodiment.
- the front portion 2f of the seat cushion 2 is a low rigidity region PSc
- the rear portion 2g is a high rigidity region PHc.
- the support reaction force fb is large with respect to the seating load acting from above in the low rigidity region PSc
- the support reaction force fc with respect to the seating load acting from the front Gives a small reaction force characteristic.
- the seat back 3 has a low rigidity region PSb in which the support reaction force fa 1 of the seated person D is small at the central portion in the vertical direction, and in the vertical direction of the low rigidity region PSb.
- high rigid regions PHb 1 and PHb 2 where the support reaction force fa 2 of the seated person D is large are set in the upper side portion and the lower side portion of the seatback 3, and the reaction force characteristics in the vertical direction of the seatback 3 Is given different stiffness distribution, and thereby the backrest surface 3a of the seat back 3 is made at various bending angles starting from the above low rigidity region PSb according to the backrest load of the seated person D, For example, in a side view, it can be bent and deformed into a shallow V shape.
- the high-rigidity region PHb 1 of the upper portion of the seat back 3 substantially is formed to correspond to the chest Da of the seated person D, seating the high rigidity region PHb 2 of lower portion It is formed corresponding approximately to the pelvis Dc of the person D.
- the low rigidity region PSb of the seatback center section, the joint of the rib cage Da and the waist Db of the seated person D i.e., around a portion corresponding to the vicinity of the 10th thoracic vertebra Da 1 of the twelfth thoracic vertebra Da 2, the required It is formed to have upper and lower width dimensions.
- the low rigidity region PSb against the backrest load, as break points BP in the vertical direction center position PS 0 low rigidity region PSb, it has become deformable bending medium is backrest surface 3a.
- the support reaction force fa (fa 1 , fa 2 from the center to the lower end portion of the backrest surface 3a Becomes larger downward, thereby emphasizing and supporting the pelvis Dc.
- the support reaction force fa (fa 1 , fa 2 ) becomes larger as it goes upward, whereby the thorax Da can be firmly supported.
- the function and effect of those embodiments can be obtained simultaneously.
- bending deformation at an optimum angle according to the physical shape of the seated person D of the backrest surface 3a of the seatback 3 and optimum on the seat cushion 2 The synergetic effect of suppressing the forward displacement movement of the buttocks from the position is obtained, and it is said that the seating stability with a comfortable feeling of sitting and a comfortable feeling of seating can be obtained for both large and small seating persons. You can get the effect.
- FIG. 29 shows a configuration example of the inclined surface 71 described above.
- FIG. 29A shows an example in which the tilt fulcrum P of the seat back 3 with respect to the seat cushion 2 is above the intersection point B.
- a projecting portion 2 ⁇ / b> A that protrudes upward with a thickness substantially the same as that of the lower end portion of the seat back 3 is integrally molded.
- the inclined surface 71 is comprised by adjusting and shape
- a projection formed integrally with the inclined surface 71 on one of the seat cushion 2 or the seat back 3 You may form by A.
- the inclined surface 71 may be formed by pad molding on any one of the pad material 41A of the seat cushion 2 and the pad material (cushion pad) 15 of the seat back 3. According to this configuration, it is possible to obtain a relatively high-rigidity inclined surface 71, so it is more effective to guide the seated person D to the optimum position of the buttocks and to control the forward movement due to pelvic support.
- the said inclined surface 71 can be advantageously obtained in terms of cost, without being accompanied by the significant structural change of the seat cushion 2 and the seat back 3, and a design change.
- FIGS. 29B and 29C show an example in which the tilt fulcrum point P is below the intersection point B.
- the inclined surface 71 is formed by an elastic strip member 72 bridging the seating area 2 a of the seat cushion 2 and the backrest 3 a of the seat back 3 across the corner region ⁇ . doing.
- the end on the intersection A side of the elastic strip member 72 is anchored and fixed by effectively utilizing the cushion wire in the seat cushion 2 and sewed at a through-draw portion (intersection A) of the seating surface 2a.
- the elastic belt-like member 72 penetrates the back surface 3a of the seat back 3 through the slit 73 provided at the intersection point B, and the other end is fixedly fixed to the tilting fulcrum P.
- the middle portion of the elastic strip member 72 slidably supports in the vicinity of the slit 73 (near the intersection point B), for example, by effectively using the lower pad support member 16L of the pad support member 16.
- positioning of the inclined surface 71 and free tilting adjustment of the seat back 3 is achieved.
- the elastic band members 72 are sewed and fixed to the seating surface 2 a of the seat cushion 2 and the backrest 3 a of the seat back 3 at intersection points A and B. It is also possible to form the inclined surface 71.
- the inclined surface 71 is formed by an elastic strip member 72 bridging the seating surface 2 a of the seat cushion 2 and the backrest surface 3 a of the seat back 3 across the corner region ⁇ .
- the tension of the elastic strip member 72 by adjusting the tension of the elastic strip member 72, the rigidity of the inclined surface 71 can be adjusted, so that the guide function to the optimum position of the buttocks of the seated person D and the front by the pelvis support It becomes possible to easily adjust the misregistration movement suppression function as required, and it becomes possible to more effectively exhibit these functions.
- the said inclined surface 71 can be advantageously obtained in terms of cost, without being accompanied by the significant structural change of the seat cushion 2 and the seat back 3, and a design change.
- the shape retaining member 74 is disposed in the vicinity of the skin of the inclined surface 71 of the backrest surface 3 a to form the inclined surface 71.
- the shape-retaining member 74 is, for example, formed in a wedge shape in a side view with an appropriate synthetic resin material, and can be translated in the front-rear direction by movable means 75 interlocked with the tilting of the seatback 3.
- the movable means 75 is a pinion rack mechanism comprising a pinion 75a disposed concentrically with the tilting fulcrum P, and a rack 75b connected to the shape retaining member 74 and meshed with the pinion 75a.
- the shape retaining member 74 is disposed in the vicinity of the skin of the inclined surface 71 of the backrest surface 3 a to configure the inclined surface 71, and the shape retaining member 74 is interlocked with the tilt of the seatback 3. Since the movable means 75 enables parallel movement in the front-rear direction, the inclined surface 71 can be disposed at the optimum position in the corner area ⁇ in accordance with the rearward inclination angle of the seat back 3. Thereby, the tilt adjustment in a wider angle range of the seat back 3 and the optimal arrangement of the inclined surface 71 can be compatible.
- the movable means 75 is not limited to this, and a wire mechanism or a link mechanism having a self return function can be selectively adopted. .
- the inclined surface 71 is not limited to the first embodiment, and may be applied in combination with the second to fourth embodiments or their variations. In these combination examples, the effects of the respective embodiments and the like according to the combination can be obtained simultaneously.
- FIG. 1 A rear seat vehicle seat 1 according to a sixth embodiment of the present invention will be described with reference to FIG.
- the present embodiment is an example in which the coefficient of friction distribution described below is imparted to the seat cushion 2 in the vehicle seat 1 of the first embodiment.
- HF HF 1 , HF 2 , HF 3 , HF 4
- LF LF 1 , LF 2 , LF 3 , LF 4
- the seating surface 2a of the seat cushion 2 a portion positioned forward than the maximum deformation part LP at the time of sitting (hereinafter, front) R1 is friction coefficient LF 1 for sliding from front to rear from the rear The coefficient of friction for forward sliding is set lower than HF 1 (LF 1 ⁇ HF 1 ). Also, sites located behind the maximum deformation part LP (hereinafter, rear) R2 is the coefficient of friction LF 2 against sliding from the rear to the front is set to be lower than the frictional coefficient HF 2 against sliding from the front to the rear (LF 2 ⁇ HF 2 ).
- the magnitude of the coefficient of friction of the support surface is obtained by, for example, cutting out a material generally used as the clothes of the seated person D into a predetermined shape and size and It can determine based on the resisting force at the time of making it slide, pressing by predetermined
- the vehicle seat 1 has the front portion 2f of the seat cushion 2 as the low rigidity region PSc and the rear portion 2g as the high rigidity region PHc, as in the first embodiment. Similar to the first embodiment, the HP guiding function, the space enlarging function, and the HP deviation preventing function can be exhibited with respect to a series of actions when the seating person D described in the embodiment is seated.
- the friction coefficient LF 1 for the sliding from the front to the rear and the friction coefficient HF 1 for the sliding from the rear to the front is set lower
- rear R2 is the coefficient of friction LF 2 against sliding from the rear to the front is set to be lower than the frictional coefficient HF 2 against sliding from the front to the rear. Therefore, resistance to movement toward the optimum position of the buttocks of the seated person D (backward movement in the area forward of the largest deformation portion LP, forward movement in the area rearwardly of the largest deformation portion LP) is further suppressed, and the hips of the seated person D The point HP can be easily led to the optimum position.
- the HP guide function can be more reliably exhibited with respect to a series of actions when the seated person D is seated.
- the friction coefficient LF 1 for the sliding movement from the front to the rear and the friction coefficient HF 1 for the sliding movement from the rear to the front is set lower, rear R2, because the friction coefficient LF 2 against sliding from the rear to the front is set to be lower than the frictional coefficient HF 2 against sliding rearward from the front, forward from the optimum position or The resistance to the backward movement is further increased, so that the misalignment of the buttocks after the buttocks are in the optimum position is more reliably prevented.
- the front R1 of the seating surface 2a of the seat cushion 2 from the front to the rear than the largest deformation portion LP at the time of seating is It is set lower than the friction coefficient HF 1 for sliding forward friction coefficient LF 1 from the rear with respect to sliding of the rear than the maximum deformation part LP R2 is the coefficient of friction LF 2 against sliding from the rear to the front from the front Since it is set to be lower than the coefficient of friction HF 2 for sliding backward, the guiding function to the optimum position of the buttocks of the seated person D by the seating surface 2 a itself and the holding function of the seating posture are more effective. In a series of actions when the seat occupant D is seated on the vehicle seat 1, the HP guide function, the space enlargement function, and the HP shift prevention function can be more reliably achieved. it can.
- FIG. 31 Modifications of the vehicle seat 1 according to the sixth embodiment will be described with reference to FIGS. 31 to 35.
- FIG. 31 shows a first modification of the present embodiment.
- the present modification is an example in which the seat back 3 of the vehicle seat 1 according to the sixth embodiment is configured to be able to be bent in the same manner as the second embodiment.
- the coefficient of friction HF of a portion corresponding to thorax Da of the seated person D (a portion R3 located above the break point BP (hereinafter, upper portion R3)) on the backrest 3a of the seatback 3 3 is set to be higher than the friction coefficient LF 4 of a portion below the portion (the upper portion R3) (a portion R4 located below the break point BP (hereinafter, the lower portion R4)) (LF 4 ⁇ HF 3 ).
- the friction coefficient HF 4 of the lower part (lower part R4) relatively lower than that of the part (upper part R3), the sliding property of the backrest surface 3a becomes good, and the seated person Since the ischium of D is likely to slide down to the maximum deformation portion LP of the seat cushion 2, the guiding function to the optimum position of the hip point HP can be exhibited better.
- the friction coefficients LF 4 and HF 3 of the backrest surface 3 a are different up and down with the break point BP as a boundary, but the position of the change point of the friction coefficient is the break point BP It is not limited. If the coefficient of friction of the portion of the backrest surface 3a corresponding to the chest Da of the seated person D is set higher than the coefficient of friction of the lower portion, the same effect as described above can be exhibited.
- FIG. 32 shows a second modification of the present embodiment.
- a raised fabric is used for the sheet surface material 81 of the first modification, and the direction of raising the fabric is determined by the position on the seating surface 2 a of the seat cushion 2 or the seat back 3. It is an example changed according to the position on the backrest surface 3a.
- the seat surface covering material 81 is attached to the surface of the surface urethane layer 82 provided on the outermost surface layer of the cushion pad 41 of the seat cushion 2 or the cushion pad 15 of the seat back 3 via the adhesive layer 83.
- the friction coefficient LF 3 for sliding from the lower part to the upper part in the upper part R3 is set from the upper part to the lower part in the upper part R3 above the break point BP of the back surface 3a.
- the coefficient of friction for sliding is set to be lower than HF 3 (LF 3 ⁇ HF 3 ).
- the friction coefficient LF 4 against sliding from above in the lower part R4 is set downward by setting the raising direction downward at the lower part R4 below the break point BP of the back surface 3a.
- the coefficient of friction for sliding from above is set to be lower than HF 4 (LF 4 ⁇ HF 4 ).
- the direction of raising is forward in the front R1 of the maximum deformation portion LP of the seating surface 2a of the seat cushion 2, and the direction of raising is the rear in the rear R2 of the maximum deformation portion LP.
- the friction coefficient LF 1 for the front-to-back sliding at the front R 1 is lower than the friction coefficient HF 1 for the back-to-front sliding (LF 1 ⁇ HF 1 ), and from the rear at the rear R 2 the friction coefficient LF 2 against sliding forward, and lower than the friction coefficient HF 2 against sliding from the front to the rear (LF 2 ⁇ HF 2).
- seat surface material 81 will not be specifically limited if it is a raising-type skin material, Other than a fabric material, it may be comprised from a synthetic leather, an artificial leather, or those combination etc.
- the same seat cover material 81 can be applied to the entire vehicle seat 1, so that the appearance of the vehicle seat 1 can be made uniform, and the sixth embodiment of the sixth embodiment described above The same effect as that of the first modification can be realized at low cost.
- FIG. 33 shows a third modification of the present embodiment.
- the surface layer of the front portion R1 is softer than the surface portion of the rear portion R2 than the maximum deformation portion LP than the maximum deformation portion LP when seated (relative to the same pressure In order to significantly deform). That is, the rigidity SSc of the surface layer of the front part R1 is set to be lower than the rigidity HSc of the surface layer of the rear part R2 (SSc ⁇ HSc).
- the surface layer of the vehicle seat 1 is elastically deformed by the load pressure when the seated person D is seated, but the contact area between the body of the seated person D and the vehicle seat 1 increases as the amount of deformation at this time increases. Therefore, the resistance to sliding increases. Therefore, even when the coefficient of friction of the sheet skin material is the same, reducing the rigidity of the surface layer can produce the same effect as increasing the coefficient of friction with respect to the resistance to sliding.
- the surface layer of the front portion R1 is set relatively softer (so that it deforms relatively to the same pressure relatively) than the largest deformation portion LP, and therefore, the front of the buttocks after seating is set. Misalignment can be prevented.
- the surface of the rear portion R2 is set to be relatively hard (relative to the same pressure so as to be deformed relatively small relative to the same pressure) than the largest deformation portion LP. It is easy to slip off the largest deformation portion LP of the cushion 2. Thereby, this modification can exhibit the guidance function to the optimal position of hip point HP still better.
- the thickness of the surface layer is appropriately adjusted in accordance with the physique of the seated person D who is the design condition and the rigidity of the pad material (in this modification, the cushion pad 41 of the seat cushion 2) supporting the surface layer. Therefore, although not particularly limited, it is preferable to be in the range of 5 to 30 mm.
- FIG. 34 shows a fourth modification of the present embodiment.
- the surface layer of a portion (upper portion R3) corresponding to the thorax Da of the seated person D in the backrest surface 3a of the seatback 3 is the portion (upper portion)
- This is an example set so as to be softer than the surface layer of the lower part (lower part R4) than R3). That is, in this modification, the rigidity SSb of the surface layer of the portion (upper R3) corresponding to the thorax Da is set lower than the rigidity HSb of the surface layer of the lower portion (lower R4) (SSb ⁇ HSb).
- the relatively heavy thorax Da can be firmly supported by the seat back 3 by setting the surface layer of the portion (upper R3) corresponding to the thorax Da on the dorsal surface 3a relatively soft.
- the muscle load of the seated person D can be reduced to prevent the seating posture of the seated person D from being distorted, and the fatigue of the seated person D can be reduced.
- the surface layer of the lower part (lower part R4) relatively harder than the part (upper part R3), the sliding property of the backrest surface 3a becomes good, and the ischia of the seated person D Is likely to slip on the maximum deformation portion LP of the seat cushion 2.
- this modification can exhibit the guidance function to the optimal position of hip point HP still better.
- the rigidity SSb and HSb of the surface layer of the backrest surface 3a are different up and down with the break point BP as a boundary, but the position of this rigidity change point is limited to the break point BP I will not. If the rigidity of the surface layer of the portion corresponding to the chest Da of the seated person D in the backrest surface 3a is set lower than the rigidity of the surface layer of the lower portion, it is possible to exert the same effect as described above.
- the surface layer of the width direction central region of the seat back 3 is the width of the central region You may set so that it may become softer than the surface layer of the width direction both ends adjacent to direction outside. In this way, when seated, a high fit is obtained between the back of the seated person D and the backrest surface 3a, and the back of the seated person D is less likely to slip on the backrest surface 3a, so that it is possible to more reliably The thorax Da of the seated person D can be supported.
- FIG. 35 shows a fifth modification of the present embodiment.
- the rigidity of the surface urethane layer 82 (82F, 82R, 82U, 82L) of the back of the sheet surface material 81 of the fourth modification is determined by the position on the seating surface 2a of the seat cushion 2 or the seatback 3 It is an example changed according to the position on the backrest surface 3a.
- the surface urethane layer 82 is a layer provided on the outermost surface layer of the cushion pad 41 of the seat cushion 2 or the cushion pad 15 of the seat back 3, and the sheet surface material 81 is attached to the surface via the adhesive layer. ing.
- a slab urethane having a thickness of about 10 mm made of a foamed molded product of polyurethane foam can be used.
- the rigidity SSb of the surface urethane layer 82U in the upper portion R3 from the break point BP and the surface urethane in the lower portion R4 from the break point BP It is set lower than the stiffness HSb 1 of the layer 82L.
- a relationship of Wb>HSb> SSb is established. It is set.
- the rigidity distribution is given also in the width direction of the backrest surface 3a, and as shown in FIG. 35C, the rigidity SSb of the surface urethane layer 82Ua in the central region in the width direction is obtained. is set lower than the rigidity HSb 2 of the surface urethane layer 82Ub in the width direction both end portions adjacent in the width direction outer side of the central region (SSb ⁇ HSb 2).
- the rigidity SSc of the surface urethane layer 82F of the front portion R1 from the maximum deformation portion LP at the time of seating is set to be lower than that of the LP.
- the relationship of Wc> HSc> SSc is established between the rigidity SSc and HSc of the surface urethane layers 82F and 82R and the rigidity Wc of an elastic material such as urethane foam constituting the cushion pad 41 of the seat cushion 2. It is set.
- the rigidity of the surface urethane layer 82 on the back of the seat cover 81 is changed according to the position on the seating surface 2 a of the seat cushion 2 or the position on the backrest 3 a of the seat back 3. I am doing it.
- the surface layer rigidity distribution similar to that of the fourth modification can be realized at low cost by adjusting the material, thickness and the like of the surface layer urethane layer according to the position on the seating surface 2a or the backrest surface 3a.
- the stiffness distribution is applied to the back surface 3a of the upper portion R3 of the seatback 3 in the width direction, and the rigidity SSb of the surface urethane layer 82Ua in the central region in the width direction is It is set lower than the rigidity HSb 2 of the surface urethane layer 82Ub at both ends.
- the friction coefficient distribution or the surface layer rigidity distribution shown in the present embodiment and its modification can be applied in combination with the second to fifth embodiments or their respective modifications.
- the friction coefficient distribution or the surface layer rigidity distribution can also be applied in combination to the combination of the inclined surface 71 of the fifth embodiment described above and the second to fourth embodiments or their respective modifications. .
- all the effects of the embodiments and the like according to the combination can be obtained simultaneously.
- the above-mentioned friction coefficient distribution and the above-mentioned surface layer rigidity distribution can be applied in combination.
- by appropriately combining the large and small coefficient of friction with the high and low (hard and soft) of the surface layer rigidity it is possible to enhance or suppress the mutual action and effect, and the seating surface 2a or the backrest surface It is possible to adjust the distribution such as the slidability of 3a, the supporting force of the thorax Da, and the pelvis Dc with a simple configuration and with finer precision.
- the friction coefficient distribution shown in the first modified example of the present embodiment and the surface layer stiffness distribution shown in the fourth modified example can be provided only to the seat back 3.
- FIG. 7 A rear seat vehicle seat 1 according to a seventh embodiment of the present invention will be described with reference to FIG.
- the present embodiment is an example in which the seat cushion 2 has a shape described below in the vehicle seat 1 of the first embodiment.
- the rear portion R2 is generally horizontal (when the seated person D is not seated) from the largest deformation portion LP when seated. It is formed to be Further, the front portion R1 is formed so as to be inclined (backward inclination) lower toward the rear than the maximum deformation portion LP in the seating surface 2a.
- the vehicle seat 1 has the front portion 2f of the seat cushion 2 as the low rigidity region PSc and the rear portion 2g as the high rigidity region PHc, as in the first embodiment. Similar to the first embodiment, the HP guiding function, the space enlarging function, and the HP deviation preventing function can be exhibited with respect to a series of actions when the seating person D described in the embodiment is seated.
- the rear portion R2 is formed to be substantially horizontal from the largest deformation portion LP at the time of seating.
- the surface of the rear portion R2 is inclined forward and downward by the sinking of the pad material 41A, so that the ischium of the seat occupant D slides down to the maximum deformation portion LP more reliably.
- the hip point HP of the seated person D can be stably guided to the optimum position.
- the front portion R1 is formed to be inclined rearward with respect to the largest deformation portion LP of the seating surface 2a. That is, since the rear inclined surface is formed in the high rigidity area PHc, the buttocks of the seated person D can be more easily slid to the rear side. Thus, the seat bone of the seated person D can be guided to the maximum deformation portion LP at the time of seating, and the hip point HP of the seated person D can be more reliably guided to the optimal position.
- the front portion R1 is formed to be inclined rearward from the maximum deformation portion LP in the seating surface 2a, the buttocks of the seated person D may be along the rearward inclined surface. Furthermore, the occupant can be guided to the rear side more quickly, and the seated person D is promptly guided to the kneeling posture. As a result, the knee room in front of the knees of the seat occupant D can be secured earlier after sitting, and a substantial knee room enlargement effect can be obtained.
- the rear portion R2 is formed so that the surface is substantially horizontal from the maximum deformation portion LP at the time of seating.
- the surface of the rear portion R2 is inclined forward and downward by the sinking of the pad member 41A. For this reason, it is possible to prevent the position of the hip point HP from being displaced rearward after sitting and the sitting posture being broken.
- the front portion R1 is formed to be inclined rearward from the maximum deformation portion LP in the seating surface 2a, the hip point HP after seating is shifted forward from the optimum position It is possible to prevent the sitting posture from being broken.
- the rear portion R2 is formed so that the surface is substantially horizontal from the maximum deformation portion LP at the time of seating.
- the front portion R1 of the seating surface 2a is formed to be inclined rearward from the largest deformation portion LP, so a guide function to the optimum position of the buttocks of the seated person D by the seating surface 2a and prompt backward guidance of the buttocks
- the HP guide function in a series of actions when the seated person D sits on the vehicle seat 1 by more effectively exerting the space enlargement function and the position shift prevention function of the buttocks after the buttocks are at the optimum position. Space expansion function and HP shift prevention function can be achieved more reliably.
- the length L (length in the front-rear direction from the rotation axis of the reclining device 5 to the maximum deformation portion LP) of the region formed substantially horizontally on the surface in the rear portion R2 from the maximum deformation portion LP is 100 to 130 mm It is preferable to be in the range. Within this range, it is possible to match the position of the ischial tuberosity when the hip point HP is at the optimum position with the position of the maximum deformation LP, and to more effectively exhibit the hip point HP shift prevention function Become.
- the seat back 3 is divided up and down into an upper seat back 3U and a lower seat back 3L.
- the seatback lower portion 3L is supported by the lower frame 91, and the lower end portion of the lower frame 91 is rotatably connected to the rear end portion of the seat cushion 2 via the reclining device 5.
- the seatback upper portion 3U is supported by the upper frame 92, and the lower end portion of the upper frame 92 is rotatably coupled to the upper end portion of the lower frame 91 via a link mechanism 93.
- an angle formed by the vertical line and the back surface 3La of the lower part 3L of the seat back is ⁇
- the inclination angle of the back surface 3Ua of the seat back upper portion 3U (the angle formed by the back surface 3Ua with respect to the horizontal plane: 90 ° - ⁇ + ⁇ ) is the inclination angle of the back surface 3La of the seat back lower portion 3L (back surface The angle formed by 3La with respect to the horizontal plane: 90 ° - ⁇ ).
- the link mechanism 93 connecting the upper frame 92 and the lower frame 91 maintains the ratio ( ⁇ / ⁇ ) of ⁇ to ⁇ substantially constant even when ⁇ changes as the seat back 3 tilts.
- the seatback lower portion 3L supported by the lower frame 91 and the seatback upper portion 3U supported by the upper frame 92 tilt through the link mechanism 93 at different angle change rates. Therefore, the backrest surface 3a of the seat back 3 is bent and deformed, and a break point BP is formed between the upper seat back 3U and the lower seat back 3L.
- the height H of the break point BP (the distance from the rotation axis of the reclining device 5 to the break point BP in the direction substantially parallel to the backrest 3 a of the seat back 3) is adjusted by adjusting the length of the lower frame It is possible to adjust to the desired height.
- Break point BP the joint of the rib cage Da and the waist Db of the seated person D, i.e., preferably be located from the 10th thoracic vertebra Da 1 in correspondence to the twelfth thoracic vertebra Da 2, the height H of 250 ⁇ 350 mm It is preferable to be in the range.
- the inclination angle (90 ° ⁇ + ⁇ ) of the backrest surface 3Ua of the upper part 3U of the seatback is larger than the inclination angle (90 ° ⁇ ) of the backrest surface 3La of the lower part of the seatback 3L. Therefore, since the posture of the seated person D approaches the comfortable posture and the muscle load of the seated person D is reduced, the seated person D does not break the sitting posture for a relatively long time for the relatively heavy thorax Da and pelvis Dc. It becomes possible to support, thereby preventing displacement of the hip point HP.
- the backrest surface 3a is aligned with the shape of the back of the seated person D in the comfortable posture. D's thorax can be held firmly.
- prescribed shape was provided to both the seat cushion 2 and the seat back 3 in the above modification, it is needless to say that the said shape may be limited only to the seat back 3, and may be provided.
- the seat back 3 is divided up and down into the seat back upper portion 3U and the seat back lower portion 3L, but the number of divisions of the seat back 3 is not limited to two, and may be set to three or more .
- the elements of the divided seat back 3 may be connected by a relatively low-rigidity pad material disposed between them, to increase the number of bending points at the time of mid-folding deformation.
- the inclination angle of the backrest surface 3a can be changed continuously or stepwise, and the backrest surface 3a can be gently curved along the spine of the seat occupant D in a comfortable posture. It becomes possible to hold D's back more firmly on the back surface 3a. As a result, it is possible to more reliably prevent the seating posture from being broken, and to prevent the displacement of the hip point HP more reliably.
- the shapes shown in the present embodiment and its modification can be applied in combination with the second to sixth embodiments or their respective modifications. Further, the shape can be applied in combination to the combination of the inclined surface 71 of the fifth embodiment described above and the second to fourth embodiments or their respective modifications. Furthermore, the shape is applied in combination with the combination of the friction coefficient distribution or the surface layer rigidity distribution described in the above-described sixth embodiment and the modification thereof, and the second to fifth embodiments or their respective modifications. It is also possible. In these combination examples, all the effects of the embodiments and the like according to the combination can be obtained simultaneously.
- FIG. 26 This embodiment is a combination of the fifth embodiment shown in FIG. 26, the first modification of the sixth embodiment shown in FIG. 31, and the modification of the seventh embodiment shown in FIG. is there.
- the front portion 2f of the seat cushion 2 is the low rigidity region PSc
- the rear portion 2g is the high rigidity region PHc.
- an inclined surface 71 for supporting the buttocks of the seated person D is provided in the corner area ⁇ where the seating surface 2a of the seat cushion 2 and the backrest surface 3a of the seatback 3 are connected.
- a front portion R1 than the maximum deformation part LP at the time of sitting can be set friction coefficient LF 1 for sliding from the front to the rear is lower than the friction coefficient HF 1 for sliding movement from the rear to the front (LF 1 ⁇ HF 1 ).
- the maximum deformation part LP than the rear R2 the friction coefficient LF 2 against sliding from the rear to the front is set lower than the friction coefficient HF 2 against sliding from the front to the rear (LF 2 ⁇ HF 2).
- the friction coefficient HF 3 of the backrest surface 3a of the break point BP upper R3 than of the seat back 3 is set higher than the friction coefficient LF 4 lower R4 than the break point BP (LF 4 ⁇ HF 3) .
- Friction coefficient of the inclined surface 71 is set to substantially the same value as the friction coefficient LF 4 lower R4.
- the surface is formed substantially horizontal at the normal time (when the seated person D is not seated) behind the largest deformation portion LP at the time of seating.
- the seat back 3 has a center folding mechanism as in the seventh embodiment, and the inclination angle of the backrest surface 3Ua of the upper seatback portion 3U is the inclination angle of the backrest surface 3La of the seatback lower portion 3L. It is configured to be larger.
- the action of the in-folding mechanism of the seat back 3 similar to the modification of the seventh embodiment and the automatic adjustment of the in-folding angle in the first modification of the sixth embodiment By exerting the function at the same time, the posture of the seated person D can be made closer to a comfortable posture while flexibly and appropriately dealing with the body difference of the seated person D. That is, according to the present embodiment, the shapes of the seating surface 2a and the backrest surface 3a can be made to follow with high precision by the shapes of the back, buttocks and thighs of the seated person D in the comfortable posture. Since the contact area between the surface 2a and the back surface 3a and the body of the seated person D can be increased, the function and effect of the friction coefficient distribution imparted to the sheet skin material can be further enhanced.
- the vehicle seat 1 according to the present embodiment is, as in the fifth embodiment, inclined in the corner region ⁇ where the seating surface 2a of the seat cushion 2 and the backrest 3a of the seatback 3 mentioned above are continuous. Since the seat occupant D is seated on the seat cushion 2, the seat 71 D can guide the buttocks of the seat occupant D to the optimum position by the inclined surface 71. Can be avoided. Further, since the friction coefficient of the inclined surface 71 is set to substantially the same value as the friction coefficient LF 4 lower R4 of the backrest surface 3a of the seat back 3, a guiding action to the buttocks of the optimum position of the seated person D It can be more effectively exhibited.
- the friction coefficient of the inclined surface 71 may be set larger than the frictional coefficient LF 4 lower R4.
- the force to support the rear side of the pelvis Dc of the seated person D is increased, retrogression of the pelvis Dc is further surely suppressed even in a long-time drive, so the buttocks shift forward and the sitting posture is It can be avoided that the knee room in front of the knee is narrowed.
- the seated person sits with the foot relatively extended forward, so the center of gravity of the seated person is closer to the front than the rear seat, and the seated person operates the pedal as a driver
- the low rigidity region PSc it is necessary to set a range that is shorter in the front-rear direction than for the rear seat as the low rigidity region PSc.
- the low rigidity region PSc is a range of about 1/3 of the thigh length in the rear seat, it is preferable to set the low rigidity region PSc to about 1/6 of the thigh length of the seated person D in the front seat.
- the feeling of pressure on the lower back and knees of the seated person is reduced. You can get a comfortable seating feeling.
Abstract
Description
本発明の第1実施形態にかかる後席用の車両用シート1について、図1乃至図3を参照して説明する。
着座時、着座者Dは、膝関節を股関節よりも前方に位置させつつ、これらの関節を屈曲させて着座する。着座した着座者Dの膝より下の部位は後席の床によって支持されるため、シートクッション2に負荷される荷重は臀部直下の領域に集中し、シートクッション2は、臀部直下の領域がその周囲の領域よりも大きく沈み込むように変形する。このときの沈み込み変形により、臀部直下の領域よりも前方側の着座面2aには、前側ほど高くなるように傾斜(後方傾斜)した傾斜面が形成されるため、方向転換を行った着座者Dは、自然に膝を立てた姿勢(以下、膝立て姿勢)になる。
着座者Dが着座面2a上で方向転換を行い、ヒップポイントHPを着座面2a上のより後方側へ移動させると、次に、着座者Dは、シートバック3に凭れ掛かって背骨をシートバック3に支持させ、最後に、ヒップポイントHPの位置を最終調整する。この過程の中では、着座者Dの大腿前部、膝裏、下腿裏部等が、比較的高い圧力でシートクッション2の前方部2fに押し付けられることがある。特に、着座者Dが小体格者であれば、大腿部の長さが比較的短いために、その圧力がより高くなる傾向にある。本実施形態にかかる車両用シート1では、シートクッション2の前方部2fに低剛性領域PScが設けられており、この低剛性領域PScが比較的小さな荷重で変形することができるので、着座者Dは、着座面2a上のより後方側に臀部を位置させることができ、車両用シート1の実質的な足元空間が拡大する。
着座者DがヒップポイントHPの位置を最終的に調整した後も、着座者D自身の動きや、走行に伴って発生する車両の振動などによって、着座者Dから着座面2aに付与される荷重(圧力)が変動することがある。本実施形態にかかる車両用シート1では、シートクッション2の後方部2gに高剛性領域PHcが設けられており、着座者Dの臀部下のクッションパッドの剛性が相対的に高くなっているため、着座面2aに付与される荷重が変動しても、クッションパッドの沈み込み量の変動が抑制される。これにより、ヒップポイントHPの位置ずれが、より確実に防止される。
本発明の第2実施形態にかかる後席用の車両用シート1について、図4乃至図8を参照して説明する。本実施形態は、第1実施形態の車両用シート1において、シートバック3に以下に述べる剛性分布を付与した例である。
第2実施形態の車両用シート1では、シートバック3は、上下方向中央部分に着座者Dの支持反力fa1が小さな低剛性領域PSbを設定すると共に、低剛性領域PSbに隣接してシートバック3の上側部と下側部とに着座者Dの支持反力fa2が大きな高剛性領域PHb1,PHb2を設定して、シートバック3の上下方向に反力特性が異なる剛性分布を付与し、シートバック3の背凭れ面3aを、着座者Dの背凭れ荷重に応じて低剛性領域PSbを起点に多様な中折れ角度で中折れ変形可能としている。
さらに、本実施形態にかかる車両用シート1では、上述の通り、シートバック3の上下方向に反力特性が異なる高剛性領域PHb1-低剛性領域PSb-高剛性領域PHb2からなる剛性分布を付与し、シートバック3の背凭れ面3aを、着座者Dの背凭れ荷重に応じて中折れ変形可能としているので、シートバック3に凭れ掛かった着座者Dの背中は、後方に凸となるように緩やかに湾曲する。そのため、着座者Dは、臀部を更に容易に後方へ移動させて、ヒップポイントHPを最適位置に誘導することができる。特に、本実施形態にかかる車両用シート1では、上述の中折れ角度の自動調整機能によって、シートバック3の背凭れ面3aが、着座者Dの体格に最も適した安楽姿勢が得られる中折れ角度に中折れ変形するので、着座者Dは、体格の大小に関わらず、臀部を更に容易に後方へ移動させて、確実にヒップポイントHPを最適位置に誘導することができる。
また、本実施形態にかかる車両用シート1では、上述の通り、シートバック3の上下方向に反力特性が異なる剛性分布を付与し、シートバック3の背凭れ面3aを着座者Dの背凭れ荷重に応じて中折れ変形可能としているので、背凭れ面3a前方の空間の大きさを着座者Dの体格に応じて自動的に変化させることができる。すなわち、大体格者が着座した場合は、小体格者が着座した場合と比較して背凭れ面3aがより大きな中折れ角度で中折れ変形するので、背凭れ面3a(特に、背凭れ面3aの上下方向中央部分(低剛性領域PSb))前方により大きな空間が生まれる。さらに換言すれば、背凭れ面3aは、着座面2a上の臀部の移動に伴って後方移動してきた着座者Dの背中を、着座者Dの体格に応じた中折れ変形量(中折れ変形に伴う、高剛性領域PHb1,PHb2に対する低剛性領域PSbの背凭れ面3aの前後方向移動量)で受け入れる。従って、本実施形態にかかる車両用シート1によれば、例えば、大体格者が着座した場合でも、背凭れ面3aが臀部の後方移動の妨げになることがなく、臀部の速やかな後方移動がより確実に実現される。これにより、着座者Dのニールームが着座後より早期に確保され、実質的なニールーム拡大効果をより確実に得ることができる。
また、本実施形態にかかる車両用シート1では、シートクッション2の後方部2gに高剛性領域PHcが設けられており、着座者Dの着座面2a上の後方移動に対する抵抗が軽減されているため、膝立て姿勢にある着座者Dの臀部はより後方側へスライドしやすい傾向にあるところ、本実施形態にかかる車両用シート1では、上述の通り、シートバック3の下側部に、着座者Dの支持反力fa2が大きな高剛性領域PHb2を設定しているので、この高剛性領域PHb2で、より後方側へ移動しようとする臀部を後方からよりしっかりと受け止めて、ヒップポイントHPの位置ずれをより確実に防止することができる。
車両用シート1の着座者Dは、一般的に、大体格者ほどシートバック3を倒して使う傾向があり、小体格者ほどシートバック3を起こして使う傾向がある。本実施形態の車両用シート1によれば、上述の通り、シートバック3の上下方向に反力特性が異なる高剛性領域PHb1-低剛性領域PSb-高剛性領域PHb2からなる剛性分布を付与し、シートバック3の背凭れ面3aを、着座者Dの背凭れ荷重に応じて中折れ変形可能としている。そのため、体重の軽い小体格者D1が着座してシートバック3を起こした場合は、図7(A)に示すように背凭れ面3aの中央部分の沈み込み量が小さく中折れ角度が小さくなる。一方、体重の重い大体格者D2が着座してシートバック3を倒した場合は、図7(B)に示すように背凭れ面3aの中央部分の沈み込み量が大きく中折れ角度が大きくなる。即ち、シートバック3を倒した場合は、シートバック3の中折れ角度が大きくなって着座者Dの胸郭Daが適度な角度で起き、シートバック3を起こした場合は、シートバック3の中折れ角度が小さくなって着座者Dの胸郭Daが過度に前傾することを防止する。従って、本実施形態によれば、シートバック3の後傾角(または着座者Dの体格)に応じて着座者Dの胸郭Daを適度な角度で起こすことができ、着座者Dの窓外視認性(前方及び側方の視認性)を向上させることができる。
小体格者D1が着座してシートバック3に凭れ掛けた場合、大体格者D2に比べて大腿部の長さが短いため、背凭れ面3aが中折れ変形すると下腿裏および膝裏がシートクッション2の前方部2fの前面に当接して、下腿裏,膝裏に圧迫感を覚える傾向となる。また、シートバック3の後方への傾動角度を大きめに調節した場合には、更に下腿裏,膝裏のシートクッション前方部2fへの当接度合いが高まるため、より圧迫感を強く感じる傾向となる。このことは、大体格者D2の場合でも起こり得る。すなわち、着座者Dが大体格者D2の場合、シートバック3の背凭れ面3aの中折れ角度が大きいため、シートバック3の後方への傾動角度を大きくすると、下腿裏,膝裏がシートクッション2の前方部2fに当接して圧迫感を強く感じる可能性がある。
本発明の第3実施形態にかかる後席用の車両用シート1について、図15乃至図16を参照して説明する。本実施形態は、第1実施形態の車両用シート1において、シートクッション2の前方部2fに以下に述べる反力特性を付与した例である。
さらに、本実施形態にかかる車両用シート1では、シートクッション2の低剛性領域PScに、上方から作用する着座荷重に対して支持反力fbが大きく、前方から作用する着座荷重に対して支持反力fcが小さな反力特性を付与しているため、着座者Dが大体格者である場合など、上方から作用する着座荷重が比較的大きい場合でも、シートクッション2の前方部2fの下方への沈み込み量を抑制して、大腿前部をより安定的に支持しつつ、着座者Dが小体格者である場合に(あるいは、大体格者である場合でも)、膝や下腿部の接触による前方からの着座荷重に対して前方部2fを柔軟に変形させて、着座者Dの着座面2a上の移動又は方向転換に対する抵抗を確実に低減することができる。
また、本実施形態にかかる車両用シート1では、上記の通り、シートクッション2の低剛性領域PScに、上方から作用する着座荷重に対して支持反力fbが大きく、前方から作用する着座荷重に対して支持反力fcが小さな反力特性を付与している。これにより、着座者Dが大体格者である場合など、上方から作用する着座荷重が比較的大きい場合でも、シートクッション2の前方部2fの下方への沈み込み量を抑制して、大腿前部をより安定的に支持しつつ、着座者Dが小体格者である場合に、前方から作用する着座荷重に対して前方部2fを柔軟に変形させて確実に足元空間を確保することができる。
また、本実施形態にかかる車両用シート1では、上記の通り、シートクッション2の低剛性領域PScに、上方から作用する着座荷重に対して支持反力fbが大きく、前方から作用する着座荷重に対して支持反力fcが小さな反力特性を付与している。これにより、着座者Dが大体格者である場合など、上方から作用する着座荷重が比較的大きい場合でも、シートクッション2の前方部2fの下方への沈み込み量を抑制して、大腿前部をより安定的に支持しつつ、着座者Dが小体格者である場合に、前方から作用する着座荷重に対する反力を小さくして、ヒップポイントHPの位置ずれをより確実に防止することができる。
本発明の第4実施形態にかかる後席用の車両用シート1について、図24乃至図25を参照して説明する。
より具体的には、本実施形態にかかる車両用シート1は、上記第1実施形態と同様に、シートクッション2の前方部2fを低剛性領域PScとし、後方部2gを高剛性領域PHcとしているため、上記第1実施形態と同様に、後席に乗り込んでから方向転換を完了するまでの間に着座者Dが行う一連の動作(特に、着座者Dのシートクッション2上の後方移動及び方向転換)に対する抵抗を抑制して、着座者DのヒップポイントHPを容易に最適位置に導くことができる。
さらに、本実施形態にかかる車両用シート1では、上記第1実施形態と同様に、シートクッション2の前方部2fに低剛性領域PScが設けられており、この低剛性領域PScが比較的小さな荷重で変形することができるので、着座者Dは、着座面2a上のより後方側に臀部を位置させることができ、車両用シート1の実質的な足元空間が拡大する。
本実施形態にかかる車両用シート1では、上記第1実施形態と同様に、シートクッション2の前方部2fを低剛性領域PScとし、後方部2gを高剛性領域PHcとして、着座者Dの臀部下のクッションパッドの剛性が相対的に高くなっているため、着座者D自身の動きや、走行に伴って発生する車両の振動などによって、着座者Dから着座面2aに付与される荷重が変動しても、クッションパッドの沈み込み量の変動が抑制される。これにより、ヒップポイントHPの位置ずれが、より確実に防止される。
(a)シートクッション2の前後方向に隣り合う部位(前部、中央部、後部など)の剛性又は反力特性を互いに異なるものとすることで、シートクッション2に前後方向の剛性分布を付与する。
(b)シートバック3の上下方向に隣り合う部位(上部、中央部、下部など)の剛性又は反力特性を互いに異なるものとすることで、シートバック3に上下方向の剛性分布を付与する。
(c)シートクッション2の着座面2aにおける前後方向に隣り合う部位(前部、中央部、後部など)の摩擦係数を互いに異なるものとすることで、シートクッション2の着座面2aに前後方向の摩擦係数分布を付与する。
(d)シートバック3の背凭れ面3aにおける上下方向に隣り合う部位(上部、中央部、下部など)の摩擦係数を互いに異なるものとすることで、シートバック3の背凭れ面3aに上下方向の摩擦係数分布を付与する。
(e)シートクッション2の着座面2aの形状(傾斜角、曲率など)を、前後方向に隣り合う部位(前部、中央部、後部など)の間で互いに異なるものとする。
(f)シートバック3の背凭れ面3aの形状(傾斜角、曲率など)を、上下方向に隣り合う部位(上部、中央部、下部など)の間で互いに異なるものとする。
まず、(a)~(f)の各項目を一項目ごとに適用する例は、全部で6通りある。また、(a)~(f)の各項目のうち二項目を組み合わせて適用することも可能である。この場合の適用例は、全部で15通りある。さらに、(a)~(f)の各項目のうち三項目を組み合わせて適用することも可能で、その例は、全部で20通りある。(a)~(f)の各項目のうち四項目を組み合わせて適用する例は、全部で15通りあり、五項目を組み合わせて適用する例は、全部で6通りある。(a)~(f)のすべての項目を組み合わせて適用することにより、上記3機能の同時達成の効果を得ることも可能である。すなわち、調整の対象となる項目の組み合わせは、計63通りある。
本発明の第5実施形態にかかる後席用の車両用シート1について、図26乃至図29を参照して説明する。本実施形態は、第1実施形態の車両用シート1に、以下に述べる傾斜面71を設けた例である。
さらに、本実施形態にかかる車両用シート1では、シートクッション2の着座面2aと、シートバック3の背凭れ面3aとが連なる隅部領域δに、着座者Dの臀部を支持する傾斜面71を備えているため、着座者Dがシートクッション2に着座する際、臀部が隅部領域δの傾斜面71に接することになり、着座者Dの臀部は、傾斜面71により最適位置に誘導される。これにより、着座する度に臀部の位置にバラつきが生じるのを回避出来る。
また、本実施形態にかかる車両用シート1では、上記隅部領域δに、着座者Dの臀部を支持する傾斜面71を備えており、この傾斜面71が、着座者Dの骨盤Dcの後側面を支持するため、長時間のドライブでも骨盤Dcの後転が抑制される。そのため、着座者Dの臀部が前方へずれ動いて着座姿勢が崩れ、膝より前方のニールームが狭まることが回避できる。特に、後席では膝より前方のニールームが狭く制約されるが、この前方へのずれ動きの抑制効果によってニールームを広く確保でき、あわせて着座者Dの安楽な着座姿勢が得られて、着座者Dの疲労を軽減することができる。
本実施形態にかかる車両用シート1では、シートクッション2の後方部2gに高剛性領域PHcが設けられており、着座者Dの着座面2a上の後方移動に対する抵抗が軽減されているため、膝立て姿勢にある着座者Dの臀部はより後方側へスライドしやすい傾向にあるところ、本実施形態にかかる車両用シート1は、上記隅部領域δに、着座者Dの臀部を支持する傾斜面71を備えており、この傾斜面71で、より後方側へ移動しようとする臀部の骨盤Dc全体を後方から受け止めて、これをしっかりと支えることができるため、ヒップポイントHPの位置ずれを更に確実に防止する。
本発明の第6実施形態にかかる後席用の車両用シート1について、図30を参照して説明する。本実施形態は、第1実施形態の車両用シート1において、シートクッション2に、以下に述べる摩擦係数分布を付与した例である。なお、図面において、HF(HF1,HF2,HF3,HF4)は、矢印で示した方向の摩擦係数が高いこと、LF(LF1,LF2,LF3,LF4)は、矢印で示した方向の摩擦係数が低いことを示している。
さらに、本実施形態にかかる車両用シート1では、シートクッション2の着座面2aにおいて、前部R1は、前方から後方への滑動に対する摩擦係数LF1が後方から前方への滑動に対する摩擦係数HF1より低く設定されており、後部R2は、後方から前方への滑動に対する摩擦係数LF2が前方から後方への滑動に対する摩擦係数HF2より低くなるように設定されている。そのため、着座者Dの臀部の最適位置に向かう移動(最大変形部LPより前方の領域では後方移動、最大変形部LPより後方の領域では前方移動)に対する抵抗が更に抑制され、着座者DのヒップポイントHPを容易に最適位置に導くことができる。これにより、着座者Dの着座時の一連の行為に対して、より確実にHPガイド機能を発揮することができる。
また、本実施形態にかかる車両用シート1では、シートクッション2の着座面2aにおいて、前部R1は、前方から後方への滑動に対する摩擦係数LF1が後方から前方への滑動に対する摩擦係数HF1より低く設定されているため、着座者Dの臀部の最適位置に向かう移動(典型的には後方側への移動)に対する抵抗は更に抑制され、着座者Dの臀部はより一層後方側へスライドしやすい傾向となる。これにより、着座者Dの臀部は着座後、着座面2aに沿って速やかに最適位置へ誘導され、着座者Dのニールームが着座後より早期に確保されるので、実質的なニールーム拡大効果をより確実に得ることができる。
また、本実施形態にかかる車両用シート1では、シートクッション2の着座面2aにおいて、前部R1は、前方から後方への滑動に対する摩擦係数LF1が後方から前方への滑動に対する摩擦係数HF1より低く設定されており、後部R2は、後方から前方への滑動に対する摩擦係数LF2が前方から後方への滑動に対する摩擦係数HF2より低くなるように設定されているため、最適位置から前方または後方へ向かう移動に対しては抵抗が更に大きくなるので、臀部が最適位置に収まった後の臀部の位置ずれが、より確実に防止される。
本発明の第7実施形態にかかる後席用の車両用シート1について、図36を参照して説明する。本実施形態は、第1実施形態の車両用シート1において、シートクッション2に、以下に述べる形状を付与した例である。
さらに、本実施形態にかかる車両用シート1では、シートクッション2の着座面2aにおいて、着座時における最大変形部LPより後部R2が、表面が略水平になるように形成されている。この後部R2の表面は、着座者Dが着座すると、パッド材41Aの沈み込みによって前下がりに傾斜するため、着座者Dの坐骨はより確実に最大変形部LPへ滑り落ちていく。これにより、着座者DのヒップポイントHPを安定して最適位置に導くことができる。
また、本実施形態にかかる車両用シート1では、着座面2aにおける最大変形部LPより前部R1が後方傾斜するように形成されているため、着座者Dの臀部をこの後方傾斜面に沿って更に速やかに後方側へ誘導することができ、着座者Dは速やかに膝立て姿勢に誘導される。これにより、着座者Dの膝より前方のニールームを着座後更に早期に確保することができ、実質的なニールームの拡大効果を得ることができる。
また、本実施形態にかかる車両用シート1では、シートクッション2の着座面2aにおいて、着座時における最大変形部LPより後部R2は、表面が略水平になるように形成されている。この後部R2の表面は、着座者Dが着座すると、パッド材41Aの沈み込みによって前下がりに傾斜する。このため、着座後ヒップポイントHPの位置が後方にずれて着座姿勢が崩れることを防止することができる。
本発明の第8実施形態にかかる後席用の車両用シート1について、図38を参照して説明する。
本実施形態は、図26に示した第5実施形態と、図31に示した第6実施形態の第1変形例と、図37に示した第7実施形態の変形例とを組み合わせたものである。
また、本実施形態にかかる車両用シート1では、第7実施形態の変形例と同様のシートバック3の中折れ機構の作用と、第6実施形態の第1変形例における中折れ角度の自動調整機能とを同時に発揮することによって、着座者Dの体格差に柔軟かつ適切に対応しつつ、着座者Dの姿勢をさらに安楽姿勢に近づけることができる。すなわち、本実施形態によれば、着座面2a及び背凭れ面3aの形状を、上記安楽姿勢における着座者Dの背中、臀部、及び大腿部の形状により高い精度で沿わせることができ、着座面2a及び背凭れ面3aと着座者Dの身体との接触面積を増加させることができるので、シート表皮材に付与した摩擦係数分布の作用効果をさらに高めることができる。
さらに、本実施形態にかかる車両用シート1は、第5実施形態と同様に、シートクッション2の着座面2aと、前述のシートバック3の背凭れ面3aとが連なる隅部領域δに傾斜面71を備えているため、着座者Dがシートクッション2に着座する際、着座者Dの臀部を傾斜面71によって最適位置に誘導することができ、これにより、着座する度に臀部の位置にバラつきが生じるのを回避出来る。また、傾斜面71の摩擦係数がシートバック3の背凭れ面3aの下部R4の摩擦係数LF4と略同一の値に設定されているため、着座者Dの臀部の最適位置へのガイド作用をさらに効果的に発揮できる。
2…シートクッション
2f…前方部
2g…後方部
3…シートバック
11…シートバックフレーム
15…クッションパッド
15a…溝部
16…パッド支持部材
41…クッションパッド
41A,41B,42,43,44,45,46…パッド材
47…シートクッション骨格材
48…荷重受け部材
49…ばね機構
50,50A,50B…空隙部
51,51A,51B…空隙部
71…傾斜面
72…弾性帯状部材
82,82F,82R,82U,82L…表層ウレタン層
91…下部フレーム
92…上部フレーム
93…リンク機構
δ…隅部領域
BP…中折れ点
D、D1、D2…着座者
Da…胸郭
Db…腰部
Dc…骨盤
LP…最大変形部
HP…ヒップポイント
Da1…第10胸椎
Da2…第12胸椎
Dc1…座骨結節
Dc2…仙骨
PHc、PHb1、PHb2…高剛性領域
PSc、PSb…低剛性領域
PSc1…大腿前部裏接触部
PSc2…膝裏接触部
PSc3…下腿裏接触部
fa1、fa2…支持反力
fb、fb1、fb2…対上方支持反力
fc、fc1、fc2…対前方支持反力
Claims (29)
- シートクッションと、シートバックと、を備え、
前記シートクッションの前方部に、高剛性領域である後方部よりも柔軟な低剛性領域を設けて、該シートクッションに前後方向の剛性分布を付与したことを特徴とする車両用シート。 - 前記シートバックは、上下方向中央部分に着座者の支持反力が小さな低剛性領域を設定すると共に、該低剛性領域に隣接してシートバックの上側部と下側部とに着座者の支持反力が大きな高剛性領域を設定して、シートバックの上下方向に反力特性が異なる剛性分布を付与し、
前記シートバックの背凭れ面を、着座者の背凭れ荷重に応じて前記低剛性領域を起点に多様な中折れ角度で中折れ変形可能としてあることを特徴とする請求項1に記載の車両用シート。 - 前記シートクッションの低剛性領域に、上方から作用する着座荷重に対して支持反力が大きく、前方から作用する着座荷重に対して支持反力が小さな反力特性を付与したことを特徴とする請求項1又は2に記載の車両用シート。
- 前記シートクッションの低剛性領域を、着座者の大腿前部裏に接触する大腿前部裏接触部と、膝裏に接触する膝裏接触部と、下腿裏に接触する下腿裏接触部とに設定し、
前記大腿前部裏接触部、膝裏接触部、及び下腿裏接触部の支持反力を、大腿前部裏接触部>膝裏接触部>下腿裏接触部として、前記シートクッションの低剛性領域の反力特性を設定したことを特徴とする請求項1乃至3のいずれか1項に記載の車両用シート。 - 前記シートクッションを、前端部を含む前記前方部と前記後方部の少なくとも2つから形成し、前記前方部を、前記反力特性を有するパッド材を用いて構成したことを特徴とする請求項4に記載の車両用シート。
- 前記シートバックの上側部に設定した高剛性領域を、着座者の胸郭に略対応して形成し、前記シートバックの下側部に設定した高剛性領域を、着座者の骨盤に略対応して形成したことを特徴とする請求項2に記載の車両用シート。
- 前記シートバックの上下方向中央部分に設定した低剛性領域を、着座者の胸郭と腰部の関節に略対応した部位を中心として形成したことを特徴とする請求項2又は6に記載の車両用シート。
- 前記シートバックは、着座者を弾性的に支持するクッションパッドを備え、該クッションパッドには、前記シートバックの低剛性領域の上下方向中央部で車幅方向に延在して、該クッションパッドの中折れ変形を促す溝部を形成したことを特徴とする請求項2、6及び7のいずれか1項に記載の車両用シート。
- 前記シートバックは、前記クッションパッドをその背面側でシートバックフレームに支持するパッド支持部材を備え、
前記シートバックの高剛性領域と低剛性領域とを、前記パッド支持部材の機械的性状を剛・柔、異ならせることによって設定したことを特徴とする請求項8に記載の車両用シート。 - 前記シートクッションの前方部を、前記大腿前部裏接触部と、膝裏接触部と、下腿裏接触部とに相当する部分で、それぞればね定数の異なるパッド材を用いて構成したことを特徴とする請求項4に記載の車両用シート。
- 前記大腿前部裏接触部に相当する部分に用いられるパッド材を、前後方向に分割した複数のパッド材で構成し、後方側に配置したパッド材のばね定数を前方側に配置したパッド材のばね定数より小さく設定したことを特徴とする請求項10に記載の車両用シート。
- 前記シートクッションの前方部を、後方部に用いられるパッド材よりもばね定数の小さなパッド材を用いて構成し、
前記シートクッションの前方部のパッド材と、後方部のパッド材とが対向して接触するパーティングラインを、前記大腿前部裏接触部と膝裏接触部との境界を略起点として後方に行くほど低くなるように傾斜させて、前記反力特性を付与したことを特徴とする請求項4に記載の車両用シート。 - 前記シートクッションの前方部を、後方部に用いられるパッド材よりもばね定数の小さなパッド材を用いて構成する一方、
シートクッション骨格材の前部に、前記低剛性領域で上方に突出する荷重受け部材を配設し、
前記荷重受け部材の上面側と前面側とで、前記シートクッションの前方部のパッド材の厚みを調整して、前記反力特性を付与したことを特徴とする請求項4に記載の車両用シート。 - 前記シートクッションの前方部を、後方部に用いられるパッド材よりもばね定数の小さなパッド材を用いて構成する一方、
シートクッション骨格材の前部に、前記低剛性領域で上方に突出する荷重受け部材を配設し、
前記荷重受け部材の上面側と前面側とで、前記シートクッションの前方部のパッド材の厚みを調整すると共に、前記荷重受け部材の前面に、前方から作用する着座荷重に対して後退変位可能なばね機構を設けて、前記反力特性を付与したことを特徴とする請求項4に記載の車両用シート。 - 前記シートクッションを、単一のパッド材を用いて構成し、
前記パッド材の前方部に空隙部を設けて、前記シートクッションの低剛性領域を構成すると共に、該低剛性領域における前記反力特性を付与したことを特徴とする請求項4に記載の車両用シート。 - 前記シートクッションの着座面と、前記シートバックの背凭れ面とが連なる隅部領域に、着座者の臀部を支持する傾斜面を備えたことを特徴とする請求項1乃至15のいずれか1項に記載の車両用シート。
- 前記傾斜面と前記シートクッションの着座面との交点を、着座者の骨盤における坐骨結節よりもやや後方となる位置に設定する一方、
前記傾斜面と前記シートバックの背凭れ面との交点を、着座者の骨盤における仙骨付近に対応する位置に設定したことを特徴とする請求項16に記載の車両用シート。 - 前記傾斜面を、前記シートクッションまたはシートバックの一方に一体成形した突出部で形成したことを特徴とする請求項16に記載の車両用シート。
- 前記傾斜面を、前記隅部領域を跨いで、前記シートクッションの着座面と、前記シートバックの背凭れ面とに架設した弾性帯状部材で形成したことを特徴とする請求項16又は17に記載の車両用シート。
- 前記シートクッションの着座面は、着座面上の隣り合う部位の間で、剛性、摩擦係数又は形状のうち少なくとも一つが異なるように設定したことを特徴とする請求項1乃至19のいずれか1項に記載の車両用シート。
- 前記シートクッションの着座面は、着座時における最大変形部より前部は、前方から後方への滑動に対する摩擦係数が後方から前方への滑動に対する摩擦係数より低く、最大変形部より後部は、後方から前方への滑動に対する摩擦係数が前方から後方への滑動に対する摩擦係数より低い構成としたことを特徴とする請求項20に記載の車両用シート。
- 前記シートクッションの着座面は、着座時における最大変形部より前部の表層が、最大変形部より後部の表層より柔らかい構成としたことを特徴とする請求項20又は21に記載の車両用シート。
- 前記シートクッションの着座面は、着座時における最大変形部より後部は表面が略水平となるように形成したことを特徴とする請求項20乃至22のいずれか1項に記載の車両用シート。
- 前記シートクッションの着座面は、着座時における最大変形部より前部は表面が後方傾斜するように形成したことを特徴とする請求項20乃至23のいずれか1項に記載の車両用シート。
- 前記シートバックの背凭れ面は、背凭れ面上の隣り合う部位の間で、剛性、摩擦係数又は形状のうち少なくとも一つが異なるように設定したことを特徴とする請求項1乃至24のいずれか1項に記載の車両用シート。
- 前記シートバックの背凭れ面は、着座者の胸郭に対応する部位の摩擦係数を、当該部位よりも下方の部位の摩擦係数より高く設定したことを特徴とする請求項25に記載の車両用シート。
- 前記シートバックの背凭れ面は、着座者の胸郭に対応する部位の表層を、当該部位よりも下方の部位の表層より柔らかい構成としたことを特徴とする請求項25又は26のいずれか1項に記載の車両用シート。
- 前記シートバックの背凭れ面は、上部の傾斜角度を下部の傾斜角度より大きくしたことを特徴とする請求項25乃至27のいずれか1項に記載の車両用シート。
- シートクッションと、シートバックと、を備えた車両用シートにおいて、
前記シートクッションの前方部に、高剛性領域である後方部よりも柔軟な低剛性領域を設けて、該シートクッションに前後方向の剛性分布を付与することを特徴とする車両用シートの剛性設定方法。
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JP7377710B2 (ja) | 2019-12-27 | 2023-11-10 | 株式会社Subaru | 車両の着座装置 |
JP2022031455A (ja) * | 2020-06-10 | 2022-02-18 | テイ・エス テック株式会社 | 車両用シート |
JP7299523B2 (ja) | 2020-06-10 | 2023-06-28 | テイ・エス テック株式会社 | 車両用シート |
Also Published As
Publication number | Publication date |
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RU2529057C1 (ru) | 2014-09-27 |
JPWO2012043807A1 (ja) | 2014-02-24 |
BR112013007306A2 (pt) | 2016-07-05 |
BR112013007306B1 (pt) | 2020-08-04 |
EP2623367A1 (en) | 2013-08-07 |
US20130175838A1 (en) | 2013-07-11 |
JP5594366B2 (ja) | 2014-09-24 |
EP2623367A4 (en) | 2017-12-27 |
CN103097182B (zh) | 2016-07-06 |
MY165807A (en) | 2018-04-27 |
CN103097182A (zh) | 2013-05-08 |
US10543764B2 (en) | 2020-01-28 |
EP2623367B1 (en) | 2022-11-02 |
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