JP2016141376A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat with a simple structure which can improve side support performance when a person is seated, and secure user-friendliness in getting on or off a vehicle when the seating person takes operation of getting on or off the vehicle.SOLUTION: A seat frame 20 includes: a pair of side frames 22 arranged at both sides in a seat width direction; and an elastic member 25 bridged between the side frames 22. A seat pad 30 includes: a main part 31 mainly supporting the weight of a seating person; and side parts 32 arranged at both sides in the seat width direction of the main part 31 to support the side surfaces of the body of the seating person. The elastic member 25 includes: a main body part 251 located between the side frames 22; and projection end parts 252 projecting to the outsides in the seat width direction from the side frames 22. The main part 31 is supported by the main body part 251, and the side parts 32 are supported by the projection end parts 252.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art A vehicle seat is known in which a seat pad that is a cushion material is placed on a seat frame that is a skeleton member. In the invention disclosed in Patent Document 1, the cushion pad includes a main part that mainly supports the weight of the seated person, and a side part that is disposed on both sides of the main part in the seat width direction and supports the side surface of the seated person. It is equipped with. The main portion of the cushion pad is elastically supported from the back side by an elastic member such as an S spring. Further, the side portion projects from the main portion toward the seat occupant and is in contact with the body of the seat occupant from the side. The larger the projecting dimension of the side portion to the seated person side with respect to the main portion, the higher the performance of the side portion to support the side surface of the seated person, that is, the side support performance.

JP 2007-167110 A

  In the case of a vehicle in which a doorway is arranged near the seat width direction of a vehicle seat, such as an automobile, the side portion is more likely to be seated by the seater as the projecting dimension of the side portion toward the seater relative to the main portion is larger. There was a risk of getting in and out of the vehicle, resulting in deterioration of the boarding / exiting performance. In the invention disclosed in Patent Document 1, in order to achieve both the improvement of the side support performance and the securing of boarding / exiting performance, a cloth-like member covering the seated person side of the side portion and the outer side in the seat width direction of the cloth-like member An electric mechanism including a winding rod connected to the terminal portion and a motor capable of rotating the winding rod is provided. When the take-up rod winds up the cloth-like member by the driving force of the motor, the cloth-like member compresses the side portion in the seat back surface direction, so that the projecting dimension of the side portion relative to the main portion toward the seated person is reduced. Thereby, at the time of sitting, the side support performance can be improved by forming the side part so that the projecting dimension of the side part to the seated person side with respect to the main part becomes large, and the seated person's vehicle can be improved. At the time of getting on and off, it is possible to ensure boarding and getting off by operating the electric mechanism described above. However, in the invention disclosed in Patent Document 1, since it is necessary to additionally provide a cloth-like member, a winding rod, a motor, and the like, the structure of the vehicle seat may be complicated.

  In view of such a problem, the problem of the present invention is that it is possible to improve the side support performance when seated by a simple structure, and to ensure getting on and off during the operation of getting on and off the seated person's vehicle. It is to provide a vehicle seat that can be achieved.

  A first invention of the present invention is a vehicle seat in which a seat pad as a cushioning material is placed on a seat frame as a skeleton member, and the pair of seat frames are disposed on both sides in the seat width direction. A side frame and an elastic member spanned between the side frames, and the seat pad is disposed on both sides of the main part in the seat width direction of the main part for mainly supporting the weight of the seated person. And a side part that supports the side of the body of the seated person, and the elastic member protrudes outward from the side frame in the seat width direction, and a main part located between the side frames. A projecting end portion, and when the main body portion is displaced toward the opposite side of the seat occupant, the projecting end portion is displaced toward the seat occupant side. Has been put, the main portion is supported by the main body, characterized in that the side portions are supported by the projecting end portion.

  According to the first aspect of the invention, when the seat is seated, the weight of the seated person is applied to the main part of the seat pad, so that the main part of the elastic member supporting the main part is displaced toward the opposite side of the seated person. It will be in the state. Thereby, the protruding end portion of the elastic member is displaced toward the seat occupant side with the side frame as a fulcrum, and the side portion is moved toward the seat occupant side. Therefore, when seated, the projecting dimension of the side part with respect to the main part toward the seated person becomes larger than the dimension when not seated, so that the side support performance can be improved. Also, among the operations to get on and off the seated person's vehicle, the weight of the seated person is not applied to the main part at the time of getting into the vehicle. Therefore, the seated person can easily enter the vehicle. Of the movements of getting on and off the rider's vehicle, when the rider gets off the vehicle, the body's weight is applied to the side part on the boarding / exit side when the body turns to the entrance / exit side in order to get off the vehicle. Therefore, the protruding end portion of the elastic member supporting the side portion on the entrance / exit side is displaced toward the opposite side of the seated person. Thereby, the projecting dimension of the side part on the entrance / exit side with respect to the main part toward the seated person is smaller than the dimension at the time of sitting, so that the seated person can easily get off the vehicle. Therefore, by a simple structure using an elastic member that elastically supports the seat pad, the side support performance can be improved at the time of sitting, and at the time of getting on and off the seated person's vehicle, Ensuring boarding / exiting can be ensured.

  According to a second aspect of the present invention, in the first aspect, a seat cover that is a skin material is stretched on the seated person side of the seat pad, and the terminal portions on both sides in the seat width direction of the seat cover are The elastic member is locked to the protruding end portion of the elastic member.

  In order to stretch the seat cover on the seat pad occupant's side, there are cases where the ends of the seat cover on both sides in the seat width direction are locked to the side frame in a state where the surface of the seat pad is covered with the seat cover. . In this case, the tension of the seat cover becomes a resistance, and there is a possibility that the side portion is difficult to move toward the seated person when sitting. According to the second aspect of the invention, the terminal portions on both sides in the seat width direction of the seat cover can move following the displacement of the protruding end portion of the elastic member toward the seated person. Therefore, since the tension force of the seat cover is less likely to become resistance, the side portion can be easily moved toward the seated person when sitting.

  According to a third aspect of the present invention, in the first aspect or the second aspect, the elastic member is an S spring formed in a wave shape in which S-shapes are connected, and the S spring is provided on the side frame. The S-spring is attached to the side frame by a part of the S spring being engaged with the engaging part.

  According to the third invention, the use of a general S spring as the elastic member of the vehicle seat, and a simple structure in which a part of the S spring is locked to the locking portion, the side support performance is improved and the passenger gets on and off. It is possible to ensure compatibility.

It is a perspective view of the seat cushion of the seat for cars which is one embodiment of the present invention. It is a disassembled perspective view of the cushion frame and cushion pad of the seat cushion of the automobile seat according to the embodiment. It is a top view of the cushion frame of the vehicle seat which concerns on the said embodiment. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1 and shows a state when the seated person is not seated. FIG. 5 is a cross-sectional view corresponding to FIG. 4, illustrating a state when the seated person is seated in the seat cushion of the automobile seat according to the embodiment. FIG. 5 is a cross-sectional view of the seat cushion of the automobile seat according to the embodiment, corresponding to FIG. 4, showing a state when the seated person gets off the automobile. It is sectional drawing which shows the modification of this invention corresponding to FIG.

  1-6 is a figure which shows one Embodiment of this invention. The present embodiment shows an example in which the present invention is applied to a seat cushion of an automobile driver's seat (hereinafter simply referred to as a seat cushion). In each figure, each direction of the automobile when the seat cushion is attached to the floor is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction. In the present embodiment, an entrance for a seated person is provided near the right side of the seat cushion.

  A seat cushion 10 shown in FIG. 1 is a seating portion of a vehicle seat. As shown in FIG. 4, the seat cushion 10 includes a cushion frame 20 that is a skeleton member, a cushion pad 30 that is a cushion material placed thereon, and a cushion cover that is a skin material that covers the surface of the cushion pad 30. 40.

  As shown in FIGS. 2 and 3, the cushion frame 20 includes a pair of left and right slide rails 21 fixed to the floor F and extending in the front-rear direction, and a pair of left and right sides attached to the upper surface of the slide rail 21 and extending in the front-rear direction. A frame 22, a front panel 23 that connects the front portions of the side frames 22, a rear pipe 24 that connects the rear portions, and a front panel 23 and a rear pipe 24 that extend between the side frames 22 in the seat width direction. And two front and rear S springs 25 are provided. A pipe-like member can be used instead of the front panel 24, and a panel-like member can be used instead of the rear pipe 24. The seat cushion 10 is configured to be able to adjust the front-rear position with respect to the floor F by the action of the slide rail 21. The side frame 22 is a metal member having a C-shape in which a cross-sectional shape cut by a plane perpendicular to the floor F and extending in the left-right direction is opened toward the inner side in the seat width direction. A substantially T-shaped through-hole 221 lying on the side is formed in two places, the upper part in the vicinity of the center part in the front-rear direction of the side frame 22 and the upper part slightly in front of the vicinity in the center part in the front-rear direction. As shown in FIGS. 2 and 4, a locking bracket 28 is attached near the through hole 221 of the side frame 22. As shown in FIG. 4, the locking bracket 28 is a metal member having a crank-like cross-sectional shape cut by a surface extending perpendicularly to the floor F and extending in the left-right direction. The locking bracket 28 has a mounting portion 28A welded to the vicinity of the lower portion of the through hole 221 on the inner side surface of the side frame 22 in the seat width direction, and a substantially L-shape extending inward in the seat width direction from the upper end portion of the mounting portion 28A. Claw portion 28B. 4 to 6, the slide rail 21 is omitted. The cushion frame 20 corresponds to a “seat frame” in the claims. The through hole 221 and the locking bracket 28 correspond to a “locking portion” in the claims.

  As shown in FIG. 3, the S spring 25 is a metal elastic member formed so as to have a wave shape with S-shaped in plan view. More specifically, the S spring 25 includes ten vertical line portions 25B having a uniform length extending in the front-rear direction and arranged at equal intervals in the seat width direction, and the front terminal portions adjacent to each other in the vertical line portion 25B, Nine horizontal line portions 25 </ b> A having a uniform length extending in the sheet width direction by alternately connecting the terminal portions. The length of the S spring 25 in the seat width direction is longer than the length in the seat width direction between the side frames 22, and when the S spring 25 is passed through the left and right through holes 221 of the side frame 22, The first vertical line portion 25B1 counted from both outer sides of the spring 25 in the seat width direction and the first horizontal line portion 25A1 counted from both outer sides of the S spring 25 in the seat width direction are outside the side frame 22 in the seat width direction. It will be in a state of protruding. As shown in FIGS. 3 and 4, the S spring 25 is passed through the through hole 221 of the side frame 22, and the second vertical line portion 25 </ b> B <b> 2 counting from both outer sides in the seat width direction of the S spring 25 is engaged. By being locked by the claw portion 28 </ b> B of the stop bracket 28, the movement in the left-right direction is stopped and attached to the side frame 22. The main body portion 251, which is a portion located between the side frames 22 in the S spring 25, is located between the second vertical line portion 25 </ b> B <b> 2 and the vertical line portion 25 </ b> B <b> 2, counting from both outer sides in the seat width direction of the S spring 25. And a vertical line portion 25B3 and a horizontal line portion 25A3. The main body portion 251 elastically supports the main portion 31 while being in contact with the lower surface of the main portion 31 described later of the cushion pad 30. As described above, the projecting end portion 252 that is a portion projecting from the side frame 22 in the S spring 25 to the outside in the seat width direction has the first vertical line portion 25B1 counted from the both outside sides of the S spring 25 in the seat width direction. The first horizontal line portion 25A1 counting from both outer sides of the S spring 25 in the sheet width direction. The protruding end portion 252 elastically supports the side portion 32 in a state where the protruding end portion 252 is in contact with the lower surface of the outer side portion 323 of the side portion 32 described later of the cushion pad 30. The S spring 25 corresponds to an “elastic member” in the claims. 2 to 6, for easy understanding of the drawings, the horizontal line portion 25 </ b> A, the vertical line portion 25 </ b> B, and the like are denoted by reference numerals only, and the others are appropriately omitted.

  The cushion pad 30 is a cushion material made of urethane foam, and as shown in FIGS. 2 and 4, a main part 31 that mainly supports the weight of the seated person, and left and right 2 disposed on the left and right sides of the main part 31. And two side portions 32. As shown in FIG. 4, the side portion 32 is formed so as to slightly protrude upward from the main portion 31. The overhanging dimension of the side portion 32 with respect to the main portion 31 is set to a size that can ensure the ease of getting on the vehicle of the seated person when the seated person is not seated. On the lower surface of the side portion 32, a recess 33 for receiving the upper portion of the side frame 22 is formed. More specifically, the side part 32 includes an inner part 321 that covers the upper part of the side frame 22 from the inner side in the seat width direction, an upper part 322 that covers from the upper side, and an outer part 323 that covers from the outer side in the seat width direction. . That is, the outer portions 323 that are both ends in the seat width direction of the side portions 32 are located on the outer side in the seat width direction with respect to the side frames 22. On the seating surface side of the boundary between the main portion 31 and the side portion 32, a longitudinal groove portion 34 is provided as shown in FIGS. Further, a lateral groove portion 35 extending in the left-right direction is provided on the seating surface side of the middle portion in the front-rear direction of the main portion 31 in accordance with a design requirement. In addition, when the cushion pad 30 covers the cushion cover 40 and is assembled to the cushion frame 20, the lower surface of the upper portion 322 of the side portion 32 and the upper surface of the side frame 22 are separated from each other as shown in FIG. The space portion S is formed. The space portion S serves as a clearance when the side portion 32 moves downward.

  The cushion cover 40 is formed into a three-dimensional shape by sewing pieces such as fabric and genuine leather. As shown in FIG. 4, locking hooks 42 are sewn to the end portions 41 on both sides of the cushion cover 40 in the seat width direction. The locking hook 42 is locked to the vertical line portion 25B1 of the protruding end portion 252 of the S spring 25. In the state where the cushion cover 40 is put on the upper surface of the cushion pad 30, the terminal portions 41 on both sides in the seat width direction are fixed by the locking of the locking hook 42 and the vertical line portion 25B1, and the front and rear terminal portions are fixed. The cushion is fixed to the cushion frame 20 by a fixing means such as a clip (not shown), and further, the portion corresponding to the vertical groove 34 and the horizontal groove 35 is fixed in a state of being suspended in the vertical groove 34 and the horizontal groove 35. The surface of the pad 30 is stretched.

  In the present embodiment configured as described above, the following operational effects can be obtained. 4 to 6, the seated person is indicated by a two-dot chain line. When the seated person is not seated, as shown in FIG. 4, the main portion 31 of the cushion pad 30 extends substantially linearly in the seat width direction between the left and right side frames 22. Here, when the seated person sits down, the weight of the seated person is applied to the main part 31, so that the main part 31 moves downward and the main part 251 of the S spring 25 as shown in FIG. Is displaced downward. As a result, the protruding end 252 tends to be displaced upward with the vertical bar portion 25B2 of the S spring 25 as a fulcrum. The protruding end portion 252 that is about to be displaced upward pushes up the outer side portion 323 of the side portion 32, and thereby the side portion 32 is moved upward. Therefore, when seated, the overhanging dimension of the side portion 32 relative to the main portion 31 is larger than when not seated. In addition, among the operations of getting on and off the seated person's vehicle, the weight of the seated person is not applied to the main part 31 during the action of getting into the vehicle. Since it becomes smaller compared to the above, it is possible for the seated person to easily get into the vehicle. Of the movements of getting on and off the rider's vehicle, when the rider gets off the vehicle, when the rider turns his body to the right in order to get off the ride, the leg part applies the weight of the rider to the right side part 32. Therefore, as shown in FIG. 6, the right protruding end portion 252 of the S spring 25 is displaced downward, and the right side portion 32 is moved downward. At this time, since the space portion S serves as a clearance, the side portion 32 is easily moved downward to a predetermined position. Therefore, during the operation of getting off the vehicle, the overhanging dimension of the right side portion 32 relative to the main portion 31 is reduced. Therefore, the side support performance is improved when seated by a simple structure in which a general S spring is used as an elastic member of a vehicle seat and a part of the S spring is locked to the locking bracket 28. In the operation of getting on and off the seated person's vehicle, it is possible to ensure boarding / exiting performance. Further, the terminal portions 41 on both sides of the cushion cover 40 in the seat width direction are movable following the displacement of the protruding end portion 252 of the S spring 25 toward the seated person. Therefore, since the tension force of the cushion cover 40 is unlikely to become resistance, the side portion 32 can be easily moved toward the seated person when sitting.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention.

  For example, in the present embodiment, the projecting end 252 of the S spring 25 is configured to extend linearly toward the outer side in the sheet width direction. However, it is not limited to this structure. That is, for example, as shown in FIG. 7, the projecting end 252A extends so as to incline toward the upper outside in the sheet width direction, and the space S is secured larger in the vertical direction than in the present embodiment. It may be a structure. In this structure, since the space below the projecting end 252A can be secured widely, a long moving distance can be secured when the projecting end 252A is displaced downward. That is, in the structure using the protruding end portion 252A, the side portion 32 with respect to the main portion 31 is moved by moving the side portion 32 downward longer than the structure using the protruding end portion 252 during the operation of getting off the vehicle. The overhanging dimension of 32 can be further reduced. Further, the protruding end portions 252 and 252 </ b> A may support the side portion 32 in a state of being embedded in the side portion 32.

  In the present embodiment, the present invention is applied to the seat cushion 10 that is a seating portion. However, the present invention is not limited to this structure, and can be applied to a seat back that is a backrest portion, for example. That is, for example, S springs extending in the seat width direction are installed between the left and right side frames of the seat back, and both end portions in the seat width direction of the S springs as projecting end portions extending outward in the seat width direction from the side frames. The structure which is comprised and the side part of the back pad which is the cushioning member of a seat back is supported may be sufficient. Even with this structure, when the seated person turns his / her body toward the entrance / exit side, the body part is applied to the side part on the entrance / exit side by pushing the side part backward with the shoulder. The overhanging dimension of the side portion on the entrance / exit side with respect to the main portion toward the seated person can be reduced.

  In the present embodiment, two S springs 25 are provided as elastic members. However, the present invention is not limited to this, and the number of S springs 25 may be one or may be three or more. Further, for example, a leaf spring that is a spring member other than the S spring may be used as the elastic member. Furthermore, the material of the elastic member may be made of metal, resin, or hard steel wire.

  In the present embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on an airplane, a ship, a train, or the like.

20 Cushion frame (seat frame)
22 Side frame 221 Through hole (locking part)
25 S spring (elastic member)
251 Main part 252 Protruding end part 28 Locking bracket (locking part)
30 Cushion pad (seat pad)
31 Main part 32 Side part 40 Cushion cover (seat cover)

Claims (3)

A vehicle seat in which a seat pad that is a cushion material is placed on a seat frame that is a skeleton member,
The seat frame includes a pair of side frames disposed on both sides in the seat width direction, and an elastic member spanned between the side frames,
The seat pad includes a main part that mainly supports the weight of the seated person, and a side part that is disposed on both sides of the main part in the seat width direction and supports the side surface of the seated person.
The elastic member has a main body portion positioned between the side frames and a protruding end portion protruding outward in the seat width direction from the side frame, and the main body portion is opposite to the seated person. The projecting end portion is attached to the side frame so as to be displaced toward the seated person when displaced toward the side, the main portion is supported by the main body portion, and the side portion is supported by the projecting end. Vehicle seats supported by the club. In claim 1,
On the seat pad side of the seat pad, a seat cover that is a skin material is stretched,
A vehicle seat in which end portions on both sides in the seat width direction of the seat cover are locked to the protruding end portions of the elastic member. In claim 1 or claim 2,
The elastic member is an S spring formed in a wave shape with S-shaped,
The S spring is a vehicle seat that is attached to the side frame when a part of the S spring is locked to a locking portion provided in the side frame.

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