JPS6122964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has two upper back sections supported by a lower mounting section to deflect rearwardly while resiliently resisting each other in response to movement of the user's body. Regarding the seat.

Automobile seat or other upholstered seat 1 with a seat cushion 12 and a back cushion 13
The seat unit 10 of FIG. 1 placed on 1
has a body 14 which is integrally formed from a synthetic plastic material and supports two cushion sleeves 15. The body 14 is rigid yet elastically deformable to adequately support the user's body and includes a back structure 16, a generally horizontal seat structure 17, and a tethering projection 18 that substantially meets the joints thereof. is formed. The protruding body 18 is 19
, and curves backwards and upwards to position 20.
Therefore, a recess 21 which is substantially hook-shaped in vertical section and faces upward is formed, and the back cushion 13 is arranged so as to hold the unit 10 in FIGS. 1 and 2 within the recess. The lower edge is accepted. Preferably, the projection 18 has the cross-section of FIG. 2 over its entire width.

The back structure 16 is attached to the surface 12 of the back cushion 13.
2 and has a support post portion 22 that is slightly rearwardly angled and relatively narrow as it extends upwardly. Post 22 is symmetrical about a central vertical front-back surface 23. The upper end of the post 22 supports a portion 24 of increased width W, which is preferably at least a few times the width l of the post 22. The upper end includes a slit 25 extending from the top of the body 14 to a position 26.
extending downwardly to a point with a surface 23 passing through its center and having a width t large enough to easily accommodate the user's spine so as to avoid exerting a supporting force on the spine. There is. Width t is approximately 1 inch (2.54
cm) and 2 inches (5.08 cm).

The slit 25 divides the upper part of the back into two halves, which are mirror images of each other and have a lower horizontal edge 30, an outer vertical edge 31, an upper horizontal edge 32 and a parallel slit forming the slit 25. It has spaced apart vertical interior edges 27 . The mold halves 28 and 29 engage the user's back on either side of the spine. Main body 14
The material of is sufficiently elastically deformable that both seat back halves 28 and 29 (when the same force is exerted on both halves 28 and 29) point 28' in FIG. and together up to the dotted line position represented by 29', or (when a greater force is exerted on one of the mold halves 28 and 29 than the other)
Separately, as represented by position 128 of mold half 28 in FIG. 5, it is bent back a distance by the user's body. These movements are essentially caused by bending and/or twisting of the narrow mounting post portion and/or narrow neck portion (dimension is made possible. The stiffness of the back structure is sufficient to provide very effective resilient support to both sides of the user's back. The lower edge 30 of the mold halves 28 and 29 is the plane 3 at the user's waistline.
3 (FIG. 3) or slightly above it. The widths l and x are the minimum thicknesses of each of the portion 22, half molds 28 and 29,
Alternatively, it is desirable that the thickness be several times the minimum thickness at position x.

Sleeve 15 is formed in an inverted shape so that it can be slid downwardly around mold halves 28 and 29 from position 15' in FIG. It has two front and back fabrics sewn together up to 37. Its inner edge is 3 below position 37.
8 and the bottom edge 39 is also open. When each cushion 15 is in use, the point 37 is just above the lower end 26 of the slit 25. The layer of padding within each sleeve is suitably secured to the sleeve so as to be received in front of the seat seat half 28 or 29.
Alternatively, the cushion pads can be made of something like Magic Tape (registered trademark) and used for halves 28 and 29.
It can also be fixed directly to the front of the Half mold 28
and 29, by bending the edge portions 41 on both sides slightly forward (Fig. 5) and bending the half mold slightly backward as it goes upward (Fig. 4), the user's back is effectively It is shaped to support.

Seat portion 17 is integrally formed with post 22 and has a trailing edge bent upwardly at 43 and 44
It is shaped to comfortably support the user's body by bending the side edges upward at this point. A slit 45, symmetrical with respect to plane 23, divides the front part of the seat into two halves 46 and 47, which halves are mirror images of each other, supporting the user's body and supporting the elasticity of the material forming the seat. can be deflected downwardly with respect to each other against the opposite direction.

When the seat user fatigues in a certain position and shifts his weight, this movement causes one of the halves 28 or 29 to bend slightly backwards relative to the other, and also causes the post 22 and seat portion 17 to one or both of the halves 46 or 47 of the seat part 17 are also bent slightly downwardly relative to one another. This movement is resiliently resisted by the resiliency of the material of the body 14. Frequently changing the position slightly keeps the user comfortable over long periods of time. The support provided by halves 28 and 29 is optimally located on either side of the spine just above the waistline, while the spine itself just above the waistline is located laterally adjacent to the user's back. into the slit 25, thereby avoiding the discomfort that occurs when the spine itself is directly supported against backward movement.

7 and 7a show a modified unit 10a which is identical to the unit of FIGS. 1-6 with the following exceptions. That is, the seat portion 17 is omitted and the lower mooring projection portion 1 has two cushions 15a and is preferably wider than the support post 22a.
Only the back structure 16a supporting the structure 8a remains. The apparatus of FIGS. 7 and 7a may be applied to a vehicle seat or the like, and is held in place by a tether 18a, as shown in FIG.

The back structure 16b of FIGS. 8 and 9 is identical to the back structure 16 of FIGS. 1-6, and supports a cushion sleeve 15b on upper mold halves 28b and 29b, and a mounting post portion 22b. It is connected to the trailing edge of the seat assembly 48 at its lower end (corresponding to section 22). Seat assembly 48 may be similar to the arrangement shown in U.S. Pat. No. 3,749,442 and movably supports two horizontal seat sections 50 and 51 to support opposite sides of the user's body. It includes a rigid horizontal base plate 49. Sections 50 and 51 are cushions and are connected at their lower portions to base plate 49 by universal joint 52. Universal joint 52 allows the sections to pivot slightly independently relative to base plate 49. The base plate 49 is connected to the lower portion of the back structure 16b by a horizontal lateral hinge 53, which allows the seat assembly to be easily transported through the position of FIG. Install it so that it swings in a position parallel to 48. In its upright operating position, the seat back structure 16b is supported against further rearward rocking by the engagement of the posts 22b and the upwardly extending rear flange portion 53 of the base plate 49. Ru. The flange portion includes a hand hole 54 by which the folded assembly can be carried. The seat of FIGS. 8 and 9 provides optimal vertical support for the user's body. On the other hand, the back provides support to the user's body, and both allow freedom of movement.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a sheet of the present invention. Second
The figure is a cross-sectional view taken along line 2--2 in FIG. Third
The figure is a front view taken along line 3--3 of FIG. Fourth
Figures 5 and 5 are lines 4-4 and 5-5 of Figure 3.
FIG. Figure 6 is line 6-6 in Figure 2.
FIG. FIG. 7 is a diagram of another embodiment similar to FIG. 2. FIG. 7a is a front view of another embodiment of FIG. 7. FIG. 8 is a perspective view of still another embodiment. FIG. 9 shows the embodiment of FIG. 8 in a folded state. 14...Main body, 16...Back structure, 17...Seat structure, 18...Protrusion body, 22...Support post portion, 25...Slit, 30, 31, 32...
Edge, 28, 29...half mold, 15...sleeve.

Claims (1)

[Scope of Claims] 1. A seat having a flexible back structure, which is sufficiently stiff to support the user's back but is flexible rearwardly to match the movement of the user's back. the body includes a support post portion extending upwardly at the center of the user's back; two halves extending laterally outwardly on opposite sides to support the back; the total width of the two halves of the body being greater than the maximum width of the support post portion; the body includes an upwardly opening slit extending downwardly into the body from the upper end at a central location between the two halves of the body and terminating above the support post portion of the body; two flexible connecting portions connecting the two halves to the support post portion and located between the lower end of the slit and the upper end of the opposite side edges of the support post portion; The slit is positioned to avoid supporting the user's back along the spine from the upper end of the slit to the lower end of the slit, thereby avoiding supporting the user's back by the two halves of the body. A seat characterized by allowing the spine to protrude further rearward than the part.