JP2007290449A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat of simple structure that a seat back part and a seat cushion part are not displaced but riding comfort is secured for a long time without displacing the seat back part and the seat cushion part. <P>SOLUTION: Angle of inclination of the surface of the seat back part 100 against the surface of the seat cushion part 200 is set in a range of 90-120 degree when seat angle of the seat cushion part 200 is set in a range of 20-28 degree, and the seat back part 100 is formed not to be tilted in relation to the seat cushion part 200 for fixation of relative position to each other. A mechanism for reclining the seat back part 100 and a mechanism for moving the seat cushion part 200 forward and backward are unnecessary, and the light vehicular seat can be thereby manufactured at low costs. Since seat angle and angle of inclination of the seat back part are set in the described range, a passenger can be always relaxed in the seat, and fatigue accumulation when sitting for a long time is restricted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat suitable for transportation equipment such as an aircraft, a train, a ship, and an automobile, and particularly relates to a vehicle seat suitable for an aircraft or a train.

  In airplanes and trains, a considerable number of seats are arranged in a row in the column direction, and a predetermined number of seats are arranged in a limited space. Accordingly, the seating space for each passenger is also limited to a predetermined size. In particular, when the seat is reclined at the front seat and a resting posture is taken, legs are arranged for the seated person in the rear seat. Since the space rapidly changes from a wide space before reclining to a narrow space, there is a problem that comfort is impaired. In view of this point, the present applicant, as Japanese Patent Application No. 2006-2761, takes a normal posture and a resting posture without tilting the back frame by allowing the cushion frame to be displaced between the rear position and the front position. A structure that can do this is proposed.

  The above structure is excellent in that the leg arrangement space of the rear seat does not change even when the resting posture is taken. However, since a mechanism for enabling displacement of the cushion frame is indispensable, the structure is complicated to some extent, which may slightly increase the seat weight and increase the manufacturing cost. There are various grades or types of aircraft and train vehicles, and it is also desired to develop a vehicle seat that can be manufactured at a lower cost and with a simpler structure that is suitable for the grade or type. The present invention has been made in view of this point.

  In order to solve the above problems, the present inventor has focused on a structure that eliminates the mechanism for displacing the cushion frame back and forth adopted in Japanese Patent Application No. 2006-2761. That is, attention was paid to a structure in which the seat back portion does not recline and the cushion frame is not displaced back and forth. According to this, it is certain that the structure is simpler than the structure of Japanese Patent Application No. 2006-2761, but since both the seat back part and the seat cushion part do not displace, they can be as long as possible without being displaced. A new structure for comfortable seating has been studied and the present invention has been completed.

That is, in the present invention according to claim 1, the seat angle of the seat cushion portion is set to any value within the range of 20 to 28 degrees,
The inclination angle of the seat back surface relative to the seat cushion surface is set to any value in the range of 90 to 120 degrees,
There is provided a vehicle seat characterized in that the seat back portion does not tilt with respect to the seat cushion portion, and the relative position between the seat back portion and the tilt angle is fixed.
The invention according to claim 2 is characterized in that the front edge portion of the cushion frame of the seat cushion portion has a structure that bends downward when receiving a pressing force of a predetermined amount or more downward. Provide vehicle seats.
In this invention of Claim 3, each edge part is connected with each side frame of the said cushion frame, and the front edge part of the said cushion frame can be bent below by using the connected part as a fulcrum. On the other hand, the vehicle seat according to claim 1 or 2, further comprising an urging means for urging the front edge portion in a direction opposite to the bending direction.
According to a fourth aspect of the present invention, there is provided the vehicle seat according to the second or third aspect, further comprising a lock mechanism that selectively allows a downward bending operation of the front edge portion of the cushion frame. provide.

  In the vehicle seat of the present invention, the seat cushion portion has a seat angle of 20 to 28 degrees, and the seat back portion surface has an inclination angle of 90 to 120 degrees with respect to the seat cushion portion surface. It is a structure in which the relative position of both is fixed at the seat angle and the tilt angle without tilting with respect to the seat cushion portion. Therefore, it is not necessary to provide a mechanism for reclining the seat back part and a mechanism for moving the seat cushion part back and forth, and the light weight can be manufactured at low cost. Moreover, since the seating angle and the inclination angle of the seat back part are set in the above range, it is possible to always sit in a relaxed state (rest state), and there is little accumulation of fatigue when sitting for a long time. . For this reason, the present invention enables a seated posture in a relaxed state at all times, and is rather unsuitable for maintaining an upright working posture suitable for light work, after boarding (boarding), It is particularly suitable as an aircraft or train vehicle seat that requires less work and requires a relaxed sitting position.

  On the other hand, when the sitting posture is always in a relaxed state (resting state) at the above-described sitting angle and inclination angle, the position of the buttocks is low with respect to the vicinity of the knee, and depending on the physique of the seated person, the person stands up. It can be difficult. For this reason, in the present invention, it is preferable that the front edge portion of the cushion frame of the seat cushion portion be bent downward when receiving a downward pressing force of a predetermined level or more. According to this structure, when trying to stand up, a pressure higher than a predetermined value that presses the front edge portion downward by the vicinity of the back of the knee is applied, so that the front edge portion bends downward and easily rises.

  Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 shows a vehicle seat 1 according to an embodiment of the present invention. As shown in this figure, the vehicle seat 1 of the present embodiment has a bottom plate portion 11 and a back plate portion 12, and side plate portions 13 so as to rise forward at both side edges of the bottom plate portion 11 and the back plate portion 12. It is comprised including the frame support body 10 which has. The frame support 10 may be any member as long as it can support a substantially U-shaped or substantially square back frame (not shown) on the inner surface side of the back plate 12 and can support the cushion frame 30 above the bottom plate 11. The shape and structure are not limited to those shown in these drawings. For example, in FIG. 1, the bottom plate portion 11 and the back plate portion 12 are integrally formed, but these may be formed from separate members. The back frame and the cushion frame 30 may be provided as long as the back frame and the cushion frame 30 support the cushion material, and the back frame and the cushion frame 30 as shown in FIG. You can also. As shown in FIG. 4, the seat back unit 100 includes a back frame and a cushion material 110 such as a three-dimensional solid knitted fabric or urethane material supported by the back frame. The cushion frame 30 and a cushion material 210 such as a three-dimensional solid knitted fabric or urethane material supported by the cushion frame 30 are configured.

  The cushion frame 30 includes two side frames 31 and a front edge portion 32 that are disposed near the inner surface of each side plate portion 13 of the frame support body 10, and the front edge portion 32 is provided at the front end of each side frame 31. Are connected to each other (see FIG. 3). Specifically, the side frame 31 is formed such that the rear end portion 31a is formed in a substantially L shape in a side view and protrudes upward, and the side frames 31 of the side frames 31 bent upward are formed. A pelvic support frame 39, which is a pelvic support portion, is disposed between the rear end portions 31a, and has a structure that improves the support performance of the pelvis. The front edge portion 32 is formed in a substantially U shape in plan view, and has a shape in which the central side portion 32a hangs slightly downward.

  The cushion frame 30 is provided so that the vicinity of the front part of the frame is higher than the vicinity of the rear part of the frame when compared with the vicinity of the front part of the frame and the vicinity of the rear part of the frame. Thereby, when the cushion material 210 such as a three-dimensional solid knitted fabric or urethane material is disposed on the cushion frame 30, the seating angle can be increased. By ensuring a large seating angle, the buttocks are positioned relatively lower than the vicinity of the knees when sitting, resulting in a relaxed (resting) posture. A preferred seating angle θ1 (see FIG. 4) is in the range of 20 to 28 degrees, and a more preferred seating angle θ1 is in the range of 22 to 26 degrees. In addition, the inclination angle θ2 (see FIG. 4) of the surface of the cushion material 110 supported by the back frame relative to the surface of the cushion material 210 supported by the cushion frame 30 is preferably set in the range of 90 to 120 degrees. Furthermore, it is more preferable that it is set in the range of 95 to 105 degrees.

  That is, the cushion frame 30 and the cushion material 210 supported by the cushion frame 30 and the back frame and the cushion material 110 supported by the back frame and the cushion material 110 supported by the cushion frame 30 have a seating angle θ1 and an inclination angle θ2 that take any value within the above range of angles. The back frame does not tilt back and forth, and further, the cushion frame 30 does not move back and forth, and the relative position of both is fixed at that angle. In other words, the vehicle seat of the present embodiment is a seat in which neither the seat back portion 100 nor the seat cushion portion 200 moves, and naturally, a mechanism for tilting the seat back portion 100, The seat is not provided with a mechanism for moving the seat cushion portion 200 back and forth or tilting.

  As shown in FIGS. 2 and 3, the front end 31 b of each side frame 31 is connected to each end 32 b of the front edge portion 32 via a pin member 33, and the pin member 33 is used as a fulcrum. The front edge portion 32 can be bent (rotated) downward. Each end portion 32b of the front edge portion 32 is formed with a projecting piece 32e projecting obliquely downward, and a coil spring 34 is stretched between the projecting piece 32e and the side plate portion 13 of the frame support 10. Yes. The coil spring 34 is always provided with an elastic force that pulls the protruding piece 32e toward the front side of the drawing. Therefore, the front edge portion 32 is always urged by the elastic force of the coil spring 34 so that the short side portions 32 c and 32 d located on both sides of the central side portion 32 a are located on the extensions of the side frames 31. (See FIG. 1). When a predetermined pressing force is applied to the front edge portion 32 from above to below, the front edge portion 32 bends downward about the pin member 33 against the elastic force of the coil spring 34. (See FIG. 2). That is, in the normal state, the short side portions 32 c and 32 d positioned on the extension of each side frame 31 rotate downward with the pin member 33 as a fulcrum. In the present embodiment, the pin member 33 and the coil spring 34 constitute “biasing means for urging the front edge portion in the direction opposite to the bending direction” defined in the claims.

  The vehicle seat 1 according to the present embodiment is used in a plurality of predetermined intervals in the column direction in an aircraft, a train, or the like. The seat 1 of the cushion material 210 supported by the cushion frame 30 and the cushion are used. Since the inclination angle θ2 of the surface of the cushion material 110 supported by the back frame with respect to the surface of the cushion material 210 supported by the frame 30 is set within the above range of angles, when sitting on the vehicle seat 1, The vicinity of the knee is relatively higher than the vicinity of the buttocks, and the back is in a relaxed posture (resting posture) inclined backward by a predetermined angle. Therefore, even when sitting on an airplane or train for a long time, it is easy to maintain a relaxed posture at all times, so there is less accumulated fatigue. Further, since the seat back portion 100 does not recline, the leg placement space for the rear seat occupant is not limited. Furthermore, the vehicle seat 1 according to the present embodiment does not require a reclining mechanism for the seat back portion 100 or a back-and-forth operation mechanism for the back frame 30, so that the structure is simple, the number of parts is reduced, and the weight is low and low. Can be manufactured at low cost.

  On the other hand, when trying to stand up from the state of sitting in the relaxed posture described above, since the vicinity of the knee is relatively higher than the buttocks, the region from the front of the thigh to the vicinity of the back of the knee is the front edge of the cushion frame 30. 32 is pressed downward from above. For this reason, the front edge portion 32 escapes from the state shown in FIG. 1 so as to bend downward about the pin member 33 against the elastic force of the coil spring 34 as shown in FIG. As a result, the space with the front seat is substantially expanded, and it is easy to get up. The coil spring 34 has an elastic force capable of positioning the short side portions 32c and 32d of the front edge portion 32 on the extension of each side frame 31, and thus the front edge portion applied when a person stands up. The elastic force is adjusted so as to be deformable by a load (pressing force) of 32. It is desirable that the front edge portion 32 be provided to bend downward at least 30 degrees or more, preferably 60 degrees or more.

  In the above-described embodiment, the front edge portion 32 of the cushion frame 30 can be bent downward against the elastic force of the coil spring 34. Therefore, not only when standing up but also by body movements when sitting, the front edge portion 32 is bent downward to some extent, and the elastic force of the coil spring 34 is felt from the front of the thigh to the vicinity of the back of the knee. As a result, there is a soft spring feeling from the vicinity of the front of the thigh to the back of the knee, but depending on the seated person, it may be preferable that the front edge 32 is fixed. Therefore, in the state of FIG. 1 in which the short side portions 32c and 32d of the front edge portion 32 are positioned on the extensions of the side frames 31, a lock mechanism that locks the front edge portion 32 so as not to rotate downward, For example, a protruding piece (not shown) that can protrude and retract inward from the side plate portion 13 of the frame support 10 is provided, and this protruding piece protrudes inward by an operation lever (not shown) provided on the side plate portion 13. If it does, it will contact | abut to the lower edge of the short return parts 32c and 32d, the rotation to the downward direction of the front edge part 32 will be prevented, and if the protrusion is returned to the original, the downward rotation of the front edge part 32 will be possible. A mechanism can also be provided.

FIG. 1 is an internal structure of a vehicle seat according to an embodiment of the present invention, and shows a state where a front edge portion does not rotate downward. FIG. 2 is a view illustrating a state in which the front edge portion is rotated downward in the vehicle seat according to the embodiment. FIG. 3 is a diagram illustrating a state in which the front edge portion is removed from the side frame. FIG. 4 is a diagram for explaining the seat angle θ1 and the inclination angle θ2 between the cushion material of the seat cushion portion and the cushion material of the seat back portion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 10 Frame support body 13 Side plate part 30 Cushion frame 31 Side frame 32 Front edge part 32a Central side part 32c, 32d Short side part 33 Pin member 34 Coil spring 100 Seat back part 110 Cushion material 200 Seat cushion part 210 Cushion Material

Claims (4)

The seat cushion seat angle is set to any value in the range of 20 to 28 degrees,
The inclination angle of the seat back surface relative to the seat cushion surface is set to any value in the range of 90 to 120 degrees,
A vehicle seat having a structure in which a seat back portion does not tilt with respect to a seat cushion portion, and a relative position between the seat back portion and the tilt angle is fixed.   The vehicle seat according to claim 1, wherein the front edge portion of the cushion frame of the seat cushion portion has a structure that bends downward when receiving a predetermined pressing force or more downward.   The front edge portion of the cushion frame is connected to each side frame of the cushion frame and can be bent downward with the connected portion as a fulcrum. The vehicle seat according to claim 1 or 2, wherein a biasing means for biasing in a direction opposite to the bending direction is disposed.   4. The vehicle seat according to claim 2, further comprising a lock mechanism that selectively allows a downward bending operation of the front edge portion of the cushion frame.

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