JP2016159871A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize a posture of a seating person when the person is seated even if a seat is changed into a form that allows the person to easily get on or off a vehicle.SOLUTION: A seat 1 includes: a cushion pad 10 which elastically receives a load of a seating occupant; and a cushion frame 20 which receives the cushion pad 10 at a fixed home position from the back side. The seat 1 has torsion springs 40 which elastically support the cushion pad 10 on the cushion frame 20 from the back side. The torsion springs 40 support the cushion pad 10 in a manner such that the cushion pad 10 is floated from the cushion frame 20 so as to enable the cushion pad 10 to be inclined to the back side.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vehicle seat. Specifically, the present invention relates to a vehicle seat including a seat pad that elastically receives a load of a seated occupant and a seat frame that receives the seat pad at a fixed position fixed from the back side.

  2. Description of the Related Art Conventionally, a vehicle seat is known in which a seat cushion is provided with a ball around the floor and can be turned obliquely (Patent Document 1). With the above configuration, the seat cushion is turned obliquely downward toward the passenger door by turning thereof, and can assist the passenger to get out of the vehicle.

Japanese Patent Laid-Open No. 10-203213

  However, in the above-described prior art, since the seat cushion is always in a turnable state by the support by the ball, it is difficult to stabilize the seated occupant in a fixed position. The present invention was devised as a solution to the above problem, and the problem to be solved by the present invention is to stabilize the sitting posture even if the seat can be changed to a form that facilitates getting on and off. It is to be made to be allowed.

  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 comprising: a seat pad that elastically receives a load of a seated occupant; and a seat frame that receives the seat pad in a fixed position fixed from the back side, the seat pad being a seat frame On the other hand, it has an elastic member elastically supported from the back side. The elastic member is configured to support the seat pad in a state of being lifted from the seat frame so that the seat pad can be inclined to the back side.

  According to the first aspect of the invention, the seat occupant's load can be stably received at a fixed position by holding the elastic position of the seat pad, and the seat can be changed to a form that is easy to get on and off by tilting the seat pad. .

  The second invention is the following configuration in the first invention described above. The elastic member is configured to support the seat pad from the back side at two symmetrical positions spaced apart from each other in the width direction with respect to the seat frame.

  According to the second invention, the seat pad can be elastically supported from the back side more stably.

  The third invention is the following configuration in the first or second invention described above. The elastic member is disposed in a region between a pair of left and right side frames constituting the seat frame. The seat pad comes into contact with one of the pair of left and right side frames by the movement inclined to the back side thereof, and the movement inclined with the contact point as a fulcrum is urged by the elastic force of the elastic member. Yes.

  According to the third aspect of the invention, the seat pad can be changed to a form that facilitates a proper getting on and off operation.

  According to a fourth invention, in any one of the first to third inventions described above, the following configuration is adopted. A structure that allows the seat pad to be tilted to the back side is applied to the seat cushion.

  According to the fourth aspect of the present invention, the seat cushion can be tilted so that the seat can be changed to a shape that facilitates getting on and off.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is a perspective view showing the initial state of a sheet. It is a disassembled perspective view of the frame structure of a seat cushion. It is the IV-IV sectional view taken on the line of FIG. It is sectional drawing showing the state by which the load by seating was applied to the seat cushion. It is sectional drawing showing the state in the middle of a seating passenger getting off from a seat cushion.

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

<Basic structure of sheet 1>
First, the configuration of the seat 1 (vehicle seat) according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the seat 1 of the present embodiment is configured as a left 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 rear end portions of the inner skeletons on the left and right sides of the seat cushion 3 via recliners 4 whose lower ends of the inner skeletons on the left and right sides respectively function as a rotation shaft device capable of stopping rotation. It is connected to. Thereby, the seat back 2 is in a state of being provided in a form in which the backrest angle can be adjusted with respect to the seat cushion 3.

  The seat cushion 3 is connected to a vehicle floor via a pair of left and right slide rails 5. Thereby, the seat cushion 3 is in a state provided in such a manner that the position in the front-rear direction can be adjusted with respect to the floor of the vehicle. In addition, when the seat occupant gets out of the entrance door on the outside of the vehicle from the posture position where the seat occupant is seated on the seat cushion 3, the seat occupant is moved by the weight of the buttocks and thighs. It can be tilted in a way that makes it easy to get off.

  Specifically, as shown in FIG. 2 and FIG. 4, the seat cushion 3 is normally an upper surface serving as a seating surface by elastic support that is balanced left and right from below by four torsion springs 40 described later. It is made into the state hold | maintained in the shape which faced the upper direction straight without tilting left and right. As a result, as shown in FIG. 5, the seat cushion 3 can receive and support the load straight from the lower side even when an occupant sits on the upper surface thereof.

  However, as shown in FIG. 6, the seat cushion 3 is configured so that the seated occupant moves his / her body toward the outside of the vehicle for getting off and lowers his / her legs to the outside of the vehicle, thereby moving the weight of the buttocks and thighs. The weight is biased toward the outside of the vehicle. As a result, the seat cushion 3 is switched to a posture in which the upper region is inclined obliquely downward toward the outside of the vehicle against the spring force of each of the torsion springs 40 described above with respect to the lower region, so that the seated occupant can easily get off the vehicle. It takes the form that can be done. Then, when the seat occupant leaves the seat cushion 3 by getting off, the seat cushion 3 returns to the shape in which the seating surface described above with reference to FIG. 4 is directed straight upward by the spring force of each of the torsion springs 40 described above. To be held.

<Basic structure of seat cushion 3>
Hereinafter, a specific configuration of the above-described seat cushion 3 will be described in detail. As shown in FIGS. 2 and 3, the seat cushion 3 is made of a urethane foam cushion pad 10 that elastically and softly receives the load of a seated occupant, and a metal pad that receives the cushion pad 10 at a fixed position fixed from the back side. The cushion frame 20, a fabric cushion cover 30 that covers the entire cushion pad 10 from the upper side, and four torsion springs 40 that elastically support the cushion pad 10 from the back side with respect to the cushion frame 20. It has become. Here, the cushion pad 10 corresponds to the “seat pad” of the present invention, the cushion frame 20 corresponds to the “seat frame” of the present invention, and the four torsion springs 40 each correspond to the “elastic member” of the present invention. To do.

<Cushion pad 10>
As shown in FIGS. 2 and 4, the cushion pad 10 described above is in a state of being formed into a shape that forms a basic outer shape of the upper region of the seat cushion 3 by its foamed shape. The cushion pad 10 is formed such that the central region in the width direction has a flat upper surface that can support the seat occupant's buttocks and thighs straight from below. However, the respective regions on the left and right sides of the cushion pad 10 swell in a mountain shape toward the upper and outer sides so that the hips and thighs of the seated occupant can be assigned and supported from both outer sides. It is formed in a shape with an upper surface.

  On the other hand, as shown in FIG. 4, the back surface of the cushion pad 10 described above has a flat shape similar to the top surface described above in the center region in the width direction, whereas in the regions on both the left and right sides. It is formed in a shape that is crushed in a mountain shape toward the upper and outer sides. By having such a shape, the cushion pad 10 has a configuration in which a central region in the width direction has a large pad thickness that sinks deeply into a region between the side frames 21 of the cushion frame 20 described later. However, the regions on both the left and right sides are assembled so as to extend through the top of each side frame 21 to a position where each side frame 21 is covered from both outsides.

  As shown in FIG. 3 to FIG. 4, the cushion pad 10 described above is provided with a sheet of cushion pan 11 made of a steel plate pressed into a shape along the undulation shape of the back surface. As a state of receiving a hard support from the lower side by the cushion pan 11, the cushion pan 11 is set in a state of being put on an upper portion of a cushion frame 20 described later. The cushion pad 10 is received by the load (body pressure) received from the buttocks and thighs of the seated occupant widely distributed in the plane direction by the support from the lower side by the hard cushion pan 11. Yes. Further, the cushion pad 10 is supported by the hard cushion pan 11 from the lower side, and the force with which each torsion spring 40 to be described later is pressed from the lower side is also widely dispersed in the surface direction, causing local crushing. The whole is suitably elastically supported from below by each torsion spring 40.

<Cushion frame 20>
As shown in FIGS. 3 to 4, the cushion frame 20 includes a pair of left and right steel plate side frames 21 that are press-cut into a substantially flat plate shape that is long in the front-rear direction. Each side frame 21 is provided so as to be opposed to each other in the width direction. Each side frame 21 has an upper edge portion and a lower edge portion that are bent inward in the width direction, so that the structural strength against bending and twisting of the side frames 21 is increased, and the edge with respect to the outside is provided. The structure is rounded into a shape that does not stand up.

  As shown in FIG. 4, each side frame 21 described above has its bottom surface portion bent to the inside in the width direction on the lower edge side set on the top surface portion of each slide rail 5 described above, and is bolted. Thus, they are connected together. Further, a resin protector 22 that integrally covers and protects the upper edge portions from the upper side is integrally attached to the upper edge portions of the side frames 21 described above. As shown in FIG. 3, each protector 22 is provided in a long shape along the upper edge of each side frame 21, and is a metal cushion that is assembled between the upper portions of the side frames 21. The pan 11 is configured to protect it from coming into direct contact with the upper edge of each metal side frame 21.

  On the upper surface of each protector 22, the semi-cylindrical protrusions 22A that protrude long in the front-rear direction are formed in a straight line at two positions in the front-rear direction. As shown in FIGS. 5 to 6, these protrusions 22 </ b> A partially contact the back surface of the cushion pan 11 when the cushion pan 11 described above sinks greatly due to the seating load applied to the seat cushion 3. The back of the cushion pan 11 functions so as to be supported by a straight line in the front-rear direction.

  In addition, on the inner side surface portion of each side frame 21 described above, a spring hook 23 that can be assembled in a state in which two of the four torsion springs 40 described later are arranged in the front-rear direction is attached. . Each spring hook 23 includes a standing plate 23A attached in a shape projecting inward at two positions on the inner side surface portion of each side frame 21 and a bridge that is bridged so as to connect each standing plate 23A. It is comprised from the board 23B and the axial part 23C connected in the state penetrated in the front-back direction between each standing board 23A in the upper position of the bridge | crosslinking board 23B. In addition, each standing board 23A and the bridge | crosslinking board 23B may be cut and raised from each side frame 21, respectively.

  Further, as shown in FIG. 3, the outer side portions of the side frames 21 described above are respectively drawn in the respective left and right edge portions of the cushion cover 30, which will be described later, at the two front and rear positions. A cover hanging piece 24 that can be fixed and put into a state is attached. Each of the cover hanging pieces 24 is formed of a steel plate material bent in a crank shape, and is provided by being coupled to the outer surface portion of each side frame 21 so that a hook-like hanging piece protrudes downward. It is supposed to be in a state.

<Cushion cover 30>
As shown in FIGS. 2 and 4, the cushion cover 30 is against the cushion pad 10 set on the upper surface portion of the cushion pan 11 set between the upper portions of the side frames 21 of the cushion frame 20 described above. In addition, it is stretched by being covered from above. In detail, the cushion cover 30 is fixed by being suspended in the cushion pad 10 by portions of the cushion cover 10 that are put on the upper surface portion of the cushion pad 10 by a suspension structure (not shown). The front, rear, left and right peripheral portions are drawn down to the peripheral portion of the cushion frame 20 and are fixed.

  Specifically, each of the peripheral edge portions on the left and right sides of the cushion cover 30 described above is provided with a resin hook 31 sewn along the peripheral edge portion on the outer surface portion of each side frame 21 described above. By being hooked from the lower side to the respective cover hanging pieces 24 at two positions in the front and rear, it is in a state of being fixed in a form of being pulled in the lower side. Further, the respective peripheral portions on the front and rear sides of the cushion cover 30 are brought into a state of being drawn into and fixed to the back surface portion of the cushion pan 11 described above by a fixing structure (not shown).

  The cushion cover 30 is held in a state where the cushion pad 10 is pressed against the upper surface of the cushion pan 11 and fixed in position by the tension accompanying the fastening. In addition, the cushion cover 30 is provided so that the cushion pad 10 is not pushed up and removed from the cushion frame 20 by the spring force of each torsion spring 40 to be described later due to the tension accompanying the fastening. It also functions to regulate 10 maximum ascent positions.

<Torsion spring 40>
As shown in FIGS. 3 and 4, each torsion spring 40 is provided by being assembled two by two on the spring hook 23 attached to the inner side surface of each side frame 21 described above. Specifically, in each torsion spring 40, a winding portion 41 wound in a coil shape at the center thereof is passed through a shaft portion 23C of each spring hook 23, and one end 42 thereof is placed on each bridge plate 23B. It is in a state of being assembled in a grounded state. Thereby, each torsion spring 40 is in a state in which the other end 43 thereof is directed upward in a free state, and the other end of the cushion pan 11 is assembled to the upper portion of the cushion frame 20. 43 is assigned to the front, rear, left and right two positions on the back surface of the cushion pan 11 from the lower side.

  As shown in FIG. 4, each torsion spring 40 has a force by which the cushion pan 11 is pushed downward by the tension accompanying the tension of the cushion cover 30 in addition to the weight of the cushion pan 11 and the cushion pad 10. In response, the other end 43 is twisted downward. However, in the initial state before the seat occupant's load is applied to the seat cushion 3, each torsion spring 40 moves the cushion pan 11 upward from the upper edge (the protector 22) of each side frame 21 by their elastic force. It is set as the structure provided with the spring rigidity which can be hold | maintained in the state which floated to the side.

  As shown in FIG. 5, each torsion spring 40 has a cushion pan 11 for each cushion pan 11 when the seat cushion 3 is subjected to a load of a seated occupant and the occupant has a relatively standard physique. Without being attached on the upper edge (protector 22) of the side frame 21, it can be held in a state where it floats upward from each side frame 21. At that time, each torsion spring 40 has a structure in which the back surface of the cushion pan 11 is supported from two left and right symmetrical positions, so that even if a seat occupant's load is applied to the seat cushion 3, the cushion pan 11. It can be held in a straight posture by applying a balanced elastic force without tilting left and right.

  As shown in FIG. 6, each torsion spring 40 is configured to move the vehicle from the cushion pad 10 to the cushion pan 11 and move the body according to the movement of the body weight when the seated occupant turns his body to the outside of the vehicle to get out of the vehicle. When a load that is biased outward is applied, each of the two torsion springs 40 on the vehicle outer side receives a force that is twisted downward more largely than each of the two torsion springs 40 on the vehicle inner side. As a result, the cushion pan 11 bottoms on the protrusion 22A of the protector 22 covered on the upper edge of the side frame 21 on the same side while being largely inclined toward the vehicle outer side.

  With the bottom, the cushion pan 11 is in a line contact state on the protrusion 22A of the protector 22 on the outside of the vehicle described above, and thereafter, the contact point (line) with the protrusion 22A is used as a fulcrum. The tilting will progress. Therefore, after the cushion pan 11 has bottomed on the protrusion 22A, the resilience of the four torsion springs 40 arranged in the region between the side frames 21 causes the cushion pan 11 to contact the protrusion 22A. It acts as a force that rises around the contact point.

  Therefore, when the seating load applied to the cushion pan 11 gradually changes to the outside of the vehicle as the seat occupant gets off the vehicle from the above state (the seating load applied to the central region that supports the buttocks of the cushion pan 11 is increased). As the pressure increases, the components of the cushion pan 11 that are pushed up by the elastic force of the torsion springs 40 gradually increase, and the seat cushion 3 increases the inclination toward the outside of the vehicle as the push-up components increase. The butt of the occupant is pushed out of the vehicle.

  The above operation assists the seated passenger to get off the vehicle. The seat cushion 3 assists the seating operation when the occupant gets on the seat 1 from the outside of the vehicle and sits down. Specifically, the seat cushion 3 is normally held in a state of being lifted from the side frames 21 by the action of the elastic force of each torsion spring 40 described above. Therefore, when the occupant is seated on the seat 1, the seat cushion 3 that is lifted can greet the seat occupant's buttocks at a closer (higher) position, and the seat occupant can move the buttocks on the seat cushion 3 with less weight movement. You will be able to sit on. In addition, when the occupant sits on the seat 1, the butt is dropped on the seat cushion 3 while the thigh is leaned on the upper corner of the seat cushion 3 outside the vehicle. Similarly to the operation described above with reference to FIG. 6, the seat cushion 3 can be tilted to the outside of the vehicle, and the buttocks can be seated on the seat cushion 3 with a small weight shift.

<Summary>
In summary, the sheet 1 of the present embodiment has the following configuration. That is, a seat 1 including a cushion pad 10 (seat pad) that elastically receives a load of a seated occupant and a cushion frame 20 (seat frame) that receives the cushion pad 10 at a fixed position fixed from the back side, A torsion spring 40 (elastic member) for supporting the cushion pad 10 elastically straight from the back side with respect to the cushion frame 20 is provided. The torsion spring 40 is configured to support the cushion pad 10 in a state of being lifted from the cushion frame 20 so as to be inclined to the back side.

  With this configuration, the cushion pad 10 can hold the seat occupant's load stably at a fixed position by holding the cushion pad 10 in an elastic position, and the seat 1 can be easily moved in and out by tilting the cushion pad 10. Can be changed to

  Further, the torsion spring 40 is configured to support the cushion pad 10 from the back side at two symmetrical positions spaced from each other in the width direction with respect to the cushion frame 20. With this configuration, the cushion pad 10 can be elastically supported from the back side more stably.

  Further, the torsion spring 40 is disposed in a region between the pair of left and right side frames 21 constituting the cushion frame 20. The cushion pad 10 abuts against a side frame 21 (one of a pair of left and right side frames 21) on the outside of the vehicle by a movement inclined to the back side, and a movement inclined about the abutted point is a torsion spring 40. It is designed to be energized by the resilience of. With such a configuration, the cushion pad 10 can be changed to a form that facilitates more appropriate getting on and off.

  In addition, the structure in which the seat pad can be tilted to the back side as described above is applied to the seat cushion 3, so that the seat 1 can be changed to a shape that facilitates getting on and off.

<Other examples>
As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the “vehicle seat” of the present invention is widely applied to seats used for various vehicles such as a vehicle other than a vehicle such as a railroad, an aircraft, and a ship, in addition to a seat other than a left seat of an automobile. It is something that can be done.

  Moreover, the structure of this invention is applicable also to the seat back in a vehicle seat. Further, the seat pad may be tilted so that the area outside the vehicle where the passenger door is located is retracted to the back side, and so that the area inside the vehicle is retracted to the back side. With such a configuration, it is possible to easily leave the vehicle inside and to sit from the vehicle inside.

  In addition to the torsion spring, other springs such as a compression spring, and various elastic bodies such as rubber and cushion materials can be used as the elastic member that elastically supports the seat pad from the back side. However, the elastic member needs to be provided so as to support the seat pad in a state of being lifted from the seat frame so that the seat pad can be inclined to the back side. The elastic member may be provided so as to elastically support the seat pad from the back side with respect to the seat frame, and may be configured to be attached to the seat pad side and apply a resilient force by contact with the seat frame. Good.

  Moreover, although the said Example showed the structure which set the hard layer (cushion pan 11) made from a steel plate in the back surface of a seat pad in order to disperse | distribute the supporting force from the elastic member hung on a seat pad widely in a surface direction, The above hard layer can be applied to various configurations such as a laminate formed by impregnating and curing a back surface material such as a nonwoven fabric on the back surface of the seat pad integrally during foam molding. . Further, instead of providing the hard layer as described above, the elastic member may be configured to widely contact the back surface of the seat pad. Specifically, the elastic member may be constituted by a leaf spring having a wide contact surface, or a member that expands the contact surface may be set at a portion of the elastic member that contacts the back surface of the seat pad.

  In addition, the structure for restricting the lift of the seat pad by the elastic member to a certain position may be performed by fixing the seat cover to the seat frame as shown in the above embodiment, or may be attached to the seat frame. Alternatively, the end of the elastic member that contacts the seat pad may be integrally coupled to the seat pad. In addition, a structure may be set in which the seat pad is coupled between the seat pad and the seat frame so that the seat pad can be lifted by a certain amount.

1 seat 2 seat back 3 seat cushion 4 recliner 5 slide rail 10 cushion pad (seat pad)
11 Cushion pan 20 Cushion frame (seat frame)
21 Side frame 22 Protector 22A Protrusion 23 Spring hook 23A Standing plate 23B Bridge plate 23C Shaft portion 24 Cover hook piece 30 Cushion cover 31 Hook hook 40 Torsion spring (elastic member)
41 Winding part 42 One end 43 The other end

Claims (4)

A vehicle seat comprising: a seat pad that elastically receives a load of a seated occupant; and a seat frame that receives the seat pad at a fixed position fixed from the back side;
An elastic member that elastically supports the seat pad from the back side with respect to the seat frame;
The elastic member is a vehicle seat that is configured to support the seat pad in a state of being lifted from the seat frame so that the seat pad can be inclined to the back side. The vehicle seat according to claim 1,
A vehicle seat in which the elastic member supports the seat pad from the back side at two symmetrical positions spaced from each other in the width direction with respect to the seat frame. The vehicle seat according to claim 1 or 2,
The elastic member is disposed in a region between a pair of left and right side frames constituting the seat frame;
The seat pad is brought into contact with one of the pair of left and right side frames by the movement inclined to the back side thereof, and the movement inclined with the contact point as a fulcrum is urged by the elastic force of the elastic member. The vehicle seat. The vehicle seat according to any one of claims 1 to 3,
A vehicle seat in which a structure for allowing the seat pad to be tilted to the back side is applied to a seat cushion.

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