JP2014108724A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular seat having a mechanism with a simple configuration for appropriately detecting a load input of a predetermined force or more as a mechanical operational movement amount.SOLUTION: A vehicular seat 1 includes: a frame-like back frame 2F; and a backrest surface part 2Nb of a flexible net member 2N extended within the frame of the back frame 2F, for receiving a back of a seated passenger. Further, there are provided: a boundary part 2Nc extended in an in-plane direction from the backrest surface part 2Nb of the net member 2N; and a headrest surface part 2Na continuing from a portion where the boundary part 2Nc is extended. When the backrest surface part 2Nb of the net member 2N is pushed and bent back upon receiving a backrest load of a predetermined force or more from the back of the seated passenger, the boundary part 2Nc operates so as to be pulled in the in-plane direction of the backrest surface part 2Nb and the headrest surface part 2Na operates so as to project out in front according to the pulled back operation movement amount of the boundary part 2Nc.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat having a frame-shaped seat frame and a flexible planar body that is stretched within the frame of the seat frame and receives the back of a seated occupant.

  Conventionally, in a vehicle seat, a configuration is known in which an active headrest that moves a headrest toward a head of a seated occupant when a rear collision of the vehicle occurs is known (Patent Document 1). Specifically, the active headrest pushes the pressure receiving mechanism disposed in the seat back using a backrest load applied to the seat occupant's back against the seat back when a rear collision of the vehicle occurs. The headrest is moved closer to the head of the seated occupant by the movement amount of the mechanical operation.

JP 2012-148772 A

  However, in the above-described prior art, the pressure receiving mechanism is a complicated mechanism, and the pad interposed between the seat occupant and the back of the seated occupant may interfere with the detection of the rear collision. The present invention was devised to solve the above problems, and the problem to be solved by the present invention is to appropriately apply a load input of a predetermined force or more as a mechanical operation movement amount in a vehicle seat. It is to simply configure a mechanism that can be detected.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
A first invention is a vehicle seat having a frame-shaped seat frame and a flexible planar body that is stretched within the frame of the seat frame and receives the back of a seated occupant. A connecting portion connected so as to extend in an in-plane direction, and an operation portion of a headrest connected to the end where the connecting portion is extended. The connecting portion is operated so that the planar body is pulled in the in-plane direction of the planar body by receiving a backrest load of a predetermined force or more from the back of the seated occupant and being bent backward. The operation part of the headrest is operated by the retracted operation movement amount.

  According to the first aspect of the present invention, the connecting portion is connected to the planar body so as to extend in the in-plane direction, so that the planar body receives a strong backrest load of a predetermined force or more and is rearward. When it is pushed and bent sideways, it is pulled in in the in-plane direction directly by the tension action of the planar body itself. Therefore, when a load greater than a predetermined force is input in the vehicle seat, this load can be appropriately detected as a mechanical operation movement amount that pulls the connecting portion in the in-plane direction of the planar body.

  The second invention is the following configuration in the first invention described above. The planar body has a backrest surface portion stretched so as to constitute the backrest surface of the seat back and a headrest surface portion stretched so as to constitute the headrest surface of the headrest. It is made up of sheets. The seat frame has a support portion that is located on the rear side of the boundary portion between the backrest surface portion and the headrest surface portion and suppresses bending deformation toward the rear side of the boundary portion. The boundary part mentioned above is comprised as a connection part, and the head-rest surface part is made into the operation part of a headrest. The backrest part is operated so that the boundary part is drawn in the in-plane direction of the backrest part with the support part as a fulcrum by receiving a backrest load of a predetermined force or more from the back part of the seated occupant and being bent backward. The head-to-head surface portion is stretched so as to be pushed forward with the support portion as a fulcrum by the operation movement amount with which the boundary portion is drawn.

  According to the second aspect of the invention, when a backrest load of a predetermined force or more is applied to the backrest surface portion, the boundary portion is drawn with the support portion as a support, and the headrest surface portion is pushed forward with the support portion as a fulcrum. To be stretched. With such a configuration, when a rear collision of the vehicle occurs, a so-called active headrest that moves the head-rest surface portion toward the head of the seated occupant can be easily formed.

  According to a third invention, in the second invention described above, there is further provided a suspension structure in which the central portion of the head-rest surface portion is normally pulled backward and fixed to the seat frame. The suspension structure is configured such that the suspension state is released when a backrest load of a predetermined force or more is applied to the backrest surface portion from the back of the seated occupant.

  According to the third aspect of the present invention, the shape of the head-resting surface portion in a normal state can be stretched in a tray-like shape that allows the head of the seated occupant to be seated and satisfactorily hung by the suspension structure. it can.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is a disassembled perspective view of a seat back. It is the disassembled perspective view which looked at the seat back from the back side. It is the perspective view which looked at the seat back from the back side. It is the VV sectional view taken on the line of FIG. FIG. 6 is a cross-sectional view illustrating a state in which a large load accompanying a vehicle rear-end collision is input to the seat back from the state of FIG. 5. 6 is an exploded perspective view of a seat back according to Embodiment 2. FIG. It is a perspective view which shows the assembly | attachment state of a seat back. It is the IX-IX sectional view taken on the line of FIG. FIG. 10 is a cross-sectional view illustrating a state in which a large load accompanying a vehicle rear-end collision is input to the seat back from the state illustrated in FIG. 9. It is sectional drawing which shows the state which further deform | transformed from the state of FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the sheet 1 of Example 1 will be described with reference to FIGS. As shown in FIG. 1, the seat 1 according to the present embodiment is configured as a driver's seat of an automobile, and includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. It has become. The seat back 2 has a structure in which an upper region thereof is integrally provided with a headrest portion 2H that serves as a headrest for a seated occupant.

  Specifically, the seat back 2 includes a frame-shaped back frame 2F that forms a skeleton thereof, and a flexible net member 2N that is stretched within the frame of the back frame 2F and elastically and softly receives the back of the seated occupant. And a resin shield 2S that covers the left and right side portions of the seat back 2 from the outside. Here, the back frame 2F corresponds to the “seat frame” of the present invention, and the net member 2N corresponds to the “planar body” of the present invention. As shown in FIG. 2, the back frame 2F described above includes a side frame 2F1 made of a pair of left and right vertically elongated steel plates, and a circle that is bridged between the upper ends of the side frames 2F1 and is integrally rigidly coupled. The steel pipe upper frame 2F2 and the connecting pipe 2F3 made of a circular steel pipe that is bridged between the lower portions of both side frames 2F1 and integrally rigidly connected to each other constitute an integrated frame shape. ing.

  Specifically, the above-described upper frame 2F2 is formed in a shape in which a central portion protrudes in a mountain shape upward by pressing and bending a single circular steel pipe material in some places. More specifically, the above-described upper frame 2F2 is bent into an inverted U-shape upward at the shoulders 2F2a forming the skeleton of both shoulders of the seat back 2 and at the center between the shoulders 2F2a. And is formed by being bent into a shape having a peak portion 2F2b formed.

  Each shoulder portion 2F2a is formed in a shape in which the outer end portion of each seat is bent to the lower side of the seat, and each end portion bent to the lower side is formed on the upper end portion of each side frame 2F1 described above. By being applied and welded, it is integrally connected to the upper end of each side frame 2F1. The peak portion 2F2b is formed in a shape that is bent from the end portion inside the seat of each shoulder portion 2F2a to the upper side of the seat and extends in an inverted U shape, and extends in an inverted U shape. The outer frame is formed in a size that can receive the head of the seated occupant.

  As shown in FIGS. 3 to 4, a bridging frame 2F4 made of a horizontally long steel plate is bridged between the rear portions of the shoulder portions 2F2a of the upper frame 2F2 described above and integrally rigidly coupled. It is in a state. In addition, a large-diameter suspension wire 2F5 having high rigidity is also bridged between the rear portions of the left and right frame portions of the above-described peak portion 2F2b, and is integrally rigidly coupled. The former bridge frame 2F4 is provided so as to be positioned on the rear side of the neck portion of the seated occupant by being provided between the rear portions of the shoulder portions 2F2a described above. Then, a horizontally elongated neck pad 2P made of urethane foam is integrally bonded to the front surface of the bridge frame 2F4.

  The above-described neck pad 2P is provided in a state of being widely applied to the front surface portion of the above-described bridging frame 2F4 in the seat width direction, and protrudes from the space between the above-described shoulder portions 2F2a to the front side of the seat. The state is provided as a state. As a result, the above-described neck pad 2P is applied from the rear side of the seat to the boundary portion 2Nc of the net member 2N assembled to the front surface portion of the back frame 2F described later, and the boundary portion 2Nc is elastically applied from the rear side of the seat. It is set as the structure used as the support state. The latter suspension wire 2F5 is used as a fastening portion for fastening the center portion of the head-to-face surface portion 2Na of the net member 2N, which will be described later, in a state where the central portion is drawn to the rear side of the seat by two suspension strings 2T. It is supposed to function. Here, the neck pad 2P corresponds to the “support portion” of the present invention, and the suspension structure of the suspension string 2T to the suspension wire 2F5 corresponds to the “suspending structure” of the present invention.

  Next, the configuration of the net member 2N will be described with reference to FIG. The net material 2N is formed as a thick planar member formed by weaving polyester fiber having heat resistance into a woven fabric having a high elongation elastic modulus made using a monofilament yarn. The net material 2N is configured in advance to be attached to the front portion of the resin frame 2B, and is attached to the front frame of the back frame 2F by assembling the resin frame 2B to the front portion of the back frame 2F. It is set as the structure assembled | attached to the state.

  The net member 2N is stretched in a region surrounded by the side frames 2F1 of the back frame 2F, the shoulders 2F2a of the upper frame 2F2, and the connecting pipe 2F3 by the assembly to the back frame 2F. The portion is configured to function as a backrest surface portion 2Nb so that the back portion of the seated occupant can be received by the surface from the rear side, and is a portion stretched in a region surrounded by the mountain portion 2F2b of the upper frame 2F2 However, it is set as the structure which functions so that the head of a seated passenger | crew can be received by a surface from the back side as the head curl surface part 2Na. The backrest surface portion 2Nb and the headrest surface portion 2Na are configured as a single piece that is connected to each other in the in-plane direction, and each peripheral portion is pulled into the resin frame 2B. They are stretched in a tensioned state with no slack or wrinkles between them.

  The above-described resin frame 2B on which the net material 2N is stretched is assembled to the front surface portion of the back frame 2F by the following procedure. That is, first, the upper hook 2Ba formed on the upper edge portion of the resin frame 2B is hooked and hooked on the peak portion 2F2b of the upper frame 2F2 from the upper side of the seat. Next, the resin frame 2B is rotated so that the peak portion 2F2b of the upper frame 2F2 on which the above-described upper hook 2Ba is hooked is dropped downward on the fulcrum, so that the resin frame 2B is overlapped with the front surface portion of the back frame 2F. Then, the lower hook 2Bb formed at the lower edge of the resin frame 2B is pushed into the connecting pipe 2F3 from the front side and elastically hooked. Accordingly, the lower hook 2Bb is elastically strongly attached to the connecting pipe 2F3, and the back frame 2F is sandwiched between the upper hook 2Ba and the lower hook 2Bb of the resin frame 2B. Then, the resin frame 2B is integrally assembled in a state where the resin frame 2B is overlaid on the front surface portion of the back frame 2F.

  Then, after the above assembly, as shown in FIGS. 3 to 4, the two hanging strings 2T stitched to the rear surface portion of the head surface 2Na of the net member 2N are pulled to the rear side of the seat, as described above. The suspension wire 2F5 bridged to the head of the upper frame 2F2 is fixed and fixed. As a result, the head curling surface portion 2Na of the net member 2N is pulled into the rear side to be in a recessed state, and is stretched in a saucer-like shape that allows the head of the seated occupant to fit and crawl well. It becomes a state.

  With the above assembly, the net member 2N is stretched in the frame of the back frame 2F via the resin frame 2B, and the boundary portion 2Nc between the headrest surface portion 2Na and the backrest surface portion 2Nb The frame 2F is elastically supported by being applied from the back side of the seat by a neck pad 2P provided to protrude between both shoulders 2F2a of the upper frame 2F2.

  As shown in FIG. 1, the seat 1 having the above-described configuration is generally elastic due to the tension action of the net member 2N stretched on the resin frame 2B described above, which receives the load that the seated occupant leans on the seat back 2. It is designed to be soft. Specifically, the net member 2N has a configuration in which a boundary portion 2Nc between the headrest surface portion 2Na and the backrest surface portion 2Nb is supported by being supported from the back side of the seat by the neck pad 2P. With the boundary portion 2Nc supported by the neck pad 2P as a fulcrum, the backrest surface portion 2Nb on the lower side elastically softly receives the backrest load of the seated occupant, and on the headrest surface portion 2Na on the upper side of the boundary portion 2Nc. The seated occupant's head wobbling load is elastically and softly received.

  At this time, the backrest load applied to the backrest surface portion 2Nb of the net member 2N has a structure in which the backrest surface portion 2Nb is connected to the headrest surface portion 2Na in one piece, and thus the elastic force exerted by the neck pad 2P. It can be received also by the action of the generating force, the tension action of the head curling face part 2Na, and the tension action of the hanging strap 2T pulling the center part of the head curling face part 2Na to the rear side. Thus, the backrest surface portion 2Nb of the net member 2N has a configuration in which the boundary portion 2Nc between the backrest surface portion 2Na and the headrest surface portion 2Na is supported from the back side of the seat by the neck pad 2P. Even though the boundary between the head and the head surface 2Na is not stretched on the resin frame 2B, the supporting force in the vicinity of the scapula where the seating pressure is easily applied is suitably increased. Appropriately distributed and received (see FIG. 5).

  Similarly, since the head-rest surface portion 2Na has a structure in which the head-rest surface portion 2Na is connected to the back-rest surface portion 2Nb, the head-rest load applied to the head-rest surface portion 2Na is caused by the neck pad 2P. It can be received also by the action of the elastic force exerted and the tension action of the backrest surface portion 2Nb. As described above, the headrest surface portion 2Na is configured such that the boundary portion 2Nc between the headrest surface portion 2Nb and the backrest surface portion 2Nb is supported from the back side of the seat by the neck pad 2P. Even though the boundary portion with 2Nb is not stretched on the resin frame 2B, the supporting force is suitably increased, and the head of the seated occupant can be properly received. (See FIG. 5).

  However, when the net member 2N described above is pressed against the backrest surface portion 2Nb with a strong force, such as a rear collision of the vehicle, as shown in FIG. 6, the back portion of the seated occupant is pressed. By receiving this force, the backrest surface portion 2Nb is greatly pushed and bent toward the back side of the seat, so that the headrest surface portion 2Na is pushed out to the front side of the seat while the neck pad 2P is used as a fulcrum and the string 2T is broken. It is to be stretched.

  Specifically, when the backrest surface portion 2Nb described above receives an input of a strong backrest load greater than or equal to a predetermined force accompanying the rear collision of the vehicle described above and is pushed and bent with a strong force toward the seat rear side, the boundary portion 2Nc is The head pad 2P is operated so as to be drawn in the in-plane direction of the backrest surface 2Nb, and the headrest 2Na is strongly pulled so as to be pushed out to the front side of the seat with the neck pad 2P as a fulcrum. Therefore, the suspension string 2T is broken by this strong pulling force, and the headrest surface portion 2Na is projected to the front side of the seat to a position where it is pulled to the maximum between the neck pad 2P and the resin frame 2B. The head-rest surface 2Na is brought close to the head of the seated occupant. As a result, the head-rest surface portion 2Na is in a state where the head can be received at a position approaching the head of the seated occupant. The force with which the headrest surface 2Na receives the head of the seated occupant is secured by the tensile force with which the back of the seated occupant is pressed against the backrest surface. With such a configuration, when a rear collision of the vehicle occurs, a so-called active headrest that easily moves the headrest surface portion 2Na toward the head of the seated occupant is easily formed.

  Here, as shown in FIGS. 1 to 2, in the seat back 2 described above, the left and right side portions of the portion that supports the waist of the seated occupant can support the waist of the seated occupant from both the left and right outer sides. Thus, it is formed in a shape swelled to the front side of the seat. Specifically, an area portion below the center of each side frame 2F1 of the back frame 2F is formed as a side support portion 2F1a in a shape that swells in a mountain shape obliquely in the front-outward direction of the seat, and the back frame 2F The resin frame 2B to be assembled to the front part of the sheet is also configured such that the part assembled to the front part of each side support part 2F1a described above is formed as a side support part 2Bc so as to be bent obliquely in a mountain shape in the front-front direction of the seat. ing.

  Thereby, the net material 2N is configured such that the portion supporting the waist portion of the seated occupant of the backrest surface portion 2Nb projects to the front side of the seat from the other portions due to the shape of the side support portions 2F1a and 2Bc described above. Yes. As a result, the net member 2N projects to the front side of the seat when the back portion of the seated occupant is pressed against the backrest surface portion 2Nb with a strong force due to a rear collision of the vehicle. The portion that supports the lower back portion receives a load from the back of the seated occupant and is appropriately pushed and bent toward the rear side of the seat.

  As described above, in the configuration of the seat of the present embodiment, the boundary portion serving as the “connecting portion” that connects the backrest surface portion 2Nb of the net member 2N serving as the “planar body” and the headrest surface portion 2Na serving as the “operation portion”. 2Nc is connected to the backrest 2Nb as a part of the net material 2N. Thereby, when the backrest surface portion 2Nb receives a strong backrest load of a predetermined force or more and is pushed and bent backward, the boundary portion 2Nc is directly drawn in the in-plane direction by the tension action of the backrest surface portion 2Nb itself. It is designed to be operated. Therefore, when a load input exceeding the above-described predetermined force is input, this load can be appropriately detected as a mechanical operation movement amount that pulls the boundary portion 2Nc in the in-plane direction of the backrest surface portion 2Nb.

  Then, the structure of the sheet | seat 1 of Example 2 is demonstrated using FIGS. In addition, in a present Example, about the location which becomes substantially the same structure and effect | action as the sheet | seat 1 shown in Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted, and a different location is demonstrated in detail. I will do it. In this embodiment, as shown in FIGS. 7 to 8, the member that supports the boundary portion 2Nc of the net member 2N from the seat rear side is fitted and mounted across the shoulder portions 2F2a of the upper frame 2F2. It is configured by a resin rod 2R. The rod 2R described above is formed in a cylindrical shape that is long in the sheet width direction, and a slit 2R1 that is opened over the entire length is formed at one location in the circumferential direction, and on the slit 2R1. An escape groove 2R2 having a shape in which the opening of the slit 2R1 is extended in the circumferential direction is formed at two portions in the axial direction. Here, the rod 2R described above corresponds to the “supporting portion” of the present invention.

  The rod 2R described above is formed by pushing both shoulder portions 2F2a of the upper frame 2F2 into the slit 2R1 so that the left and right frame portions of the peak portion 2F2b of the upper frame 2F2 are received in the escape grooves 2R2. As a state where both shoulder portions 2F2a are fitted in the cylinder, the shoulder portion 2F2a is set in a state of being spanned between both shoulder portions 2F2a. The rod 2R described above is normally set in a state in which the slit 2R1 is turned so as to face upward from the front side of the seat, as shown in FIG. As a result, the rod 2R is not removed from the respective shoulder portions 2F2a to the rear side of the seat even when the seat member's backrest load is applied to the net member 2N and the pressing force is applied from the front side of the seat. As a state of being bridged between the shoulder portions 2F2a, the boundary portion 2Nc of the net member 2N is held in a state of being supported from the seat rear side.

  As shown in FIG. 10, the rod 2R described above is caused by a rear collision of the vehicle, and the back of the seated occupant is pressed against the backrest 2Nb of the net member 2N with a strong force. When the curled surface portion 2Nb is greatly pushed and bent toward the rear side of the seat, the front surface thereof is rubbed and rotated by the boundary portion 2Nc by the action of this force. Specifically, when the backrest surface portion 2Nb is largely pushed and bent toward the seat rear side as described above, the boundary portion 2Nc is drawn in the in-plane direction of the backrest surface portion 2Nb by the action of this force. The rod 2R is drawn into the lower side of the seat while being rubbed strongly against the front surface of the rod 2R with the fulcrum as a fulcrum. Therefore, the rod 2R is pushed downward (counterclockwise in the figure) by the action of the rubbed force.

  Then, when the rod 2R is pushed to the position where the slit 2R1 described above is directed to the front side of the seat, the rod 2R is pushed by the drooping load of the seated occupant applied to the net member 2N as shown in FIG. The shoulders 2F2a of the upper frame 2F2 are removed from the slit 2R1 by the pressure, and are removed from the fitted state with the shoulders 2F2a. Thereby, the support state from the seat rear side of the boundary portion 2Nc by the rod 2R is released, and the boundary portion 2Nc is pushed and bent to the seat rear side by the occupant load of the seated occupant. As a result, the back of the seated occupant is received at a position retracted to the rear side of the seat from the support position when the support by the rod 2R (see FIG. 9) is provided. As a result, the headrest surface portion 2Na is backrest surface portion. It is in a state of being pushed forward relative to 2Nb. Even with such a configuration, when a rear collision of the vehicle occurs, it is possible to easily form a so-called active headrest that moves the headrest surface portion 2Na toward the head of the seated occupant.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the “vehicle seat” of the present invention may be a seat applied to vehicles other than automobiles such as railways, and is widely applied to seats used for various vehicles such as aircraft and ships. It is something that can be done. In addition, the “planar body” of the present invention may be a flexible planar body such as a cloth material, and may be a planar body having no stretchability. Further, the “planar body” does not have to constitute the skin of the vehicle seat, and may be provided so as to be stretched on the inside or the back surface of the curled portion.

  In addition, the “joining portion” of the present invention may be configured to be connected to the planar body so as to extend in the in-plane direction. In addition to what is configured as a part of the planar body, the planar body It may be a separate configuration connected to each other. That is, the “joint portion” of the present invention is drawn in the in-plane direction of the planar body by the planar body receiving a backrest load of a predetermined force or more from the back of the seated occupant and being pushed and bent backward. Any member may be used as long as it can be operated to operate the operation unit of the headrest, and a member having various power transmission configurations such as a cable, a band member, rubber, a plate member, and the like can be applied.

  In addition, the “headrest operating portion” of the present invention may be provided so as to be connected to the connecting portion, and when the rear collision of the vehicle or the like occurs, the planar body has a back with a predetermined force or more from the back of the seated passenger. What is necessary is just to operate | move so that it may perform a certain function to operate so that both the side parts of a headrest may be put out as a side support part, for example, when it receives a drooping load and is bent back. In addition, the “planar body” of the present invention may be provided by being directly attached to the seat frame. The “planar body” has a large connecting portion in the in-plane direction of the planar body when the seat frame receives a backrest load of a predetermined force or more from the back of the seated occupant and is bent backward. It is preferable that a part is a free end so that it can be retracted, and the part is drawn in a larger in-plane direction than the other fixed end part, and a connecting part is connected to that part.

  In addition, the “supporting portion” of the present invention may be any structure as long as it is configured to suppress bending deformation to the rear side of the boundary portion of the planar body, and is usually provided in contact with or separated from the boundary portion. It does not matter whether it is provided. Further, the “support portion” may be an elastic body or a rigid body. In addition, the “hanging structure” in which the central portion of the head-resting surface portion is normally pulled backward and fixed to the seat frame is formed by a stretchable member such as a rubber or a spring. It may be a structure that is suspended, and breaks when a load greater than a predetermined force is applied to the backrest surface portion and a pulling force is applied in the in-plane direction via the connecting portion. The configuration may be such that the “hanging state” is canceled by extending without any problem.

1 seat (vehicle seat)
2 Seat back 2F Back frame (seat frame)
2F1 Side frame 2F1a Side support part 2F2 Upper frame 2F2a Shoulder part 2F2b Mountain part 2F3 Connecting pipe 2F4 Bridged frame 2F5 Suspension wire 2P Neck pad (support part)
2N Net material (planar body)
2Na Head-rest surface portion 2Nb Back-rest surface portion 2Nc Boundary portion 2T Suspension string (suspending structure)
2B Resin frame 2Ba Upper hook 2Bb Lower hook 2Bc Side support part 2R Rod (support part)
2R1 Slit 2R2 Relief groove 2S Shield 2H Headrest 3 Seat cushion

Claims (3)

A vehicle seat having a frame-shaped seat frame and a flexible planar body that is stretched in the frame of the seat frame and receives a back of a seated occupant,
A connecting portion connected to the planar body so as to extend in an in-plane direction; and
An operation portion of a headrest connected to the extended end of the connection portion,
The connecting portion is operated so that the planar body is pulled in the in-plane direction of the planar body by receiving a backrest load of a predetermined force or more from the back of the seated occupant and being bent backward. The vehicle seat according to claim 1, wherein the operation portion of the headrest is operated by an operation movement amount of the connecting portion retracted. The vehicle seat according to claim 1,
The planar body has a backrest surface portion stretched so as to constitute the backrest surface of the seat back and a headrest surface portion stretched so as to constitute the headrest surface of the headrest. It is made up of one piece,
The seat frame has a support portion that is located on the rear side of the boundary portion between the backrest surface portion and the headrest surface portion and suppresses the bending deformation to the rear side of the boundary portion,
The boundary portion is configured as the connecting portion, the headrest surface portion is an operation portion of the headrest, and the backrest surface portion receives a backrest load of the predetermined force or more from the back portion of the seated occupant and is bent backward. As a result, the boundary portion is operated so as to be drawn in the in-plane direction of the backrest surface portion with the support portion as a fulcrum, and the headrest surface portion causes the support portion to be moved by the amount of operation movement of the boundary portion. A vehicle seat characterized in that the vehicle seat is configured to be pushed forward by a fulcrum. The vehicle seat according to claim 2,
Furthermore, it has a suspension structure in which the central portion of the headrest surface portion is normally pulled rearward and fixed to the seat frame, and the suspension structure has a seating occupant seated on the backrest surface portion. A vehicle seat characterized in that a suspended state is released by applying a backrest load of a predetermined force or more from a back portion.

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