JPH0534953U - Car back rest - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a backrest for an automobile, in which the protrusion is prevented from sinking due to the vertical component of the load, and the natural shape of the back line is maintained. A backrest main body 6 for an automobile, in which a backrest main body 6 is covered with two cover bodies 7 and 8, has a projection 9 which projects from a backrest surface 15 and has a curved surface. A core member 4 interposed between the substrate 2 and the cushion member 3 forms a protrusion 9, and the protrusion 9 has an asymmetrical shape in which its center of gravity is displaced upward with respect to the center of the protrusion width. Is formed. The core material 4 is adhered to the substrate 2 at a position corresponding to the waist or back of the body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a backrest for an automobile, which is attached to a backrest portion of a seat of the automobile.

[0002]

[Prior Art]

 When you sit on the seat of a car, the back of the car is dented inward, so as shown in Fig. 6, the part from the back to the waist of the body sinks into the dent in the backrest 11, and the back line bends. There is a problem that it gets worse and burdens the lower back and internal organs. Therefore, an automobile backrest 18 as shown in FIG. 7 is attached to the backrest portion 11 of the seat of the automobile to prevent the body from sinking into the recess of the backrest portion 11 and to maintain the natural shape of the back streaks. I chose The backrest 18 for an automobile is provided with a protrusion 20 projecting from the backrest surface 19 for the purpose of supporting a portion from the back to the waist of a body having a particularly deep depression. The protrusion 20 has a semicircular longitudinal section, and its center of gravity G is located on the center line of the protrusion width of the protrusion 20.

[0003]

[Problems to be solved by the device]

 However, in such a backrest 18 for an automobile, the backrest 11 of the seat is inclined rearward, so that when a person sits down on the seat, the load M applied to the protrusion 20 is horizontal as shown in FIG. With respect to the angle θ, the vertical component force My is generated and pushes down the protrusion 20. Therefore, the protrusion 20 is deformed and crushed into a flat shape as shown by the chain line in the figure, and the function of supporting the part from the back part to the waist part is deteriorated, so that there is a problem that the natural figure cannot be maintained.

The present invention has been made in view of the above problems, and by devising the shape of the projection, it is possible to prevent the function of the projection from deteriorating and to maintain a natural figure with a stretched back streak. The purpose is to provide a back rest.

[0005]

[Means for Solving the Problems]

 This invention is a backrest for an automobile, which is mounted on a backrest of a seat of a car, and in which a projection projecting from the backrest surface and having a curved surface is provided at a position corresponding to the waist or back of the human body. The protrusion is formed in an asymmetrical shape with its center of gravity displaced upward with respect to the center position of the protrusion width.

[0006]

[Action]

 Since the center of gravity of the protrusion is displaced upward with respect to the center position of the protrusion width, the protrusion retains its shape even if a vertical component of the load acts on the protrusion. Is large, and the degree of deformation can be suppressed to be small due to the restoring force. Even if the protrusion is deformed, the deformation is such that the apex of the protrusion translates downward along the backrest surface, and the protrusion is not flattened. Therefore, the back or waist of the body is supported with the back lines stretched, and a natural body shape can be maintained.

[0007]

【Example】

 1 and 2 show an automobile backrest 1 according to an embodiment of the present invention. The back support body 6 is composed of a substrate 2, a cushion material 3, a core material 4 and a synthetic resin plate 5, and the entire outer circumference is covered with two cover bodies 7 and 8.

This automobile backrest 1 has a trapezoidal planar shape with a short upper side 16 and a longer lower side 17, and has an appropriate thickness. On the backrest surface 15 side of the automobile backrest 1, there is provided a projection 9 projecting from the backrest surface 15 and having a curved surface over the entire width at a position corresponding to the waist or back of the human body. The protrusion 9 is an asymmetrical shape having a steep curved surface on the upper side 16 side and a gentle curved surface on the lower side 17 with the apex portion 10 interposed therebetween, and its center of gravity G is above the center line c of the protruding width d. Located in. Of the two cover bodies 7 and 8, the inner cover body 8 is made of non-woven fabric and the outer cover body 7 is made of woven fabric.

The back support body 6 is constructed by stacking a substrate 2 and cushion material 3 with a synthetic resin plate 5 and a core material 4 interposed therebetween, and joining the peripheral portions with an adhesive. The substrate 2 is formed of hard urethane foam, and has a trapezoidal planar shape with a short upper side and a long lower side.

The synthetic resin plate 5 has a trapezoidal shape slightly smaller than the outer shape of the substrate 2, and is adhered onto the substrate 2 with an adhesive. This synthetic resin plate 5 is for holding the shape of the backrest 1 for automobiles, and is made of a hard synthetic resin material such as vinyl chloride.

The core material 4 constitutes the projection 9 of the automobile backrest 1, and is formed of semi-rigid urethane foam or the like. The core material 4 has a width corresponding to the width of the substrate 2, and the upper surface thereof has a steep curved surface on the upper side 16 side and a gentle curved surface on the lower side 17 side with the apex portion 10 interposed therebetween. The core material 4 is adhered to the synthetic resin plate 5 at a position corresponding to the back or waist of the body with an adhesive.

The cushion material 3 is a semi-rigid urethane foam and has an uneven surface 12 having a large number of projections and depressions on its surface. Each convex portion of the uneven surface 12 has a hardened portion formed by impregnating its tip with a rubber-based liquid and then heating at about 100 ° C. to vulcanize and solidify the rubber-based liquid. .. If necessary, a plurality of permanent magnets are provided on the concave convex surface 12 of the cushion material.

3 and 4 show another embodiment of the present invention. The backrest surface 15 of this embodiment is provided with two protrusions 13 and 13 at symmetrical positions corresponding to the waist and back of the human body. In the case of this embodiment, the protrusions 13 and 13 are composed of the core materials 14 and 14 which are independent from each other. It has a curved surface. The other structure is the same as that of the first embodiment, and the corresponding structures are designated by the same reference numerals and the description thereof is omitted.

As shown in FIG. 5, when the backrest 1 for an automobile is mounted on the backrest portion 11 of the seat of the automobile and the user sits down on the seat, the protrusion 9 supports the back portion and the waist portion, and Holds in a stretched and natural shape. Also, the weight due to the weight acts on the protrusion 9, and the vertical component force tries to push down the protrusion 9, but since the protrusion 9 has a shape that is raised upwards, the load resistance against the vertical component force is increased. The characteristics are excellent, the shape of the protrusion 9 is maintained, and the degree of deformation is suppressed to a small level by the restoring force. Further, the deformation of the protrusion 9 is such that the apex portion 10 of the protrusion 9 moves in parallel downward along the backrest surface 15, so that the protrusion 9 is not crushed into a flat shape. , The back or waist of the body is properly supported and the back spine is maintained in a natural shape. Further, in the embodiment of FIG. 3, the protrusions 13 and 13 support the waist from the back of the body with the spine sandwiched therebetween, and similarly maintain a natural body shape.

[0015]

[Effect of the device]

 As described above, the present invention provides a protrusion projecting from the back support surface and having a curved surface at a position corresponding to the waist or back of the human body, and the center of gravity of the protrusion is at the center position of the protrusion width. On the other hand, since it is formed in an asymmetrical shape that is displaced upwards, the protrusions are not crushed into a flat shape, functional deterioration is prevented, and the natural shape of the back spine can be maintained. Play.

[Brief description of drawings]

FIG. 1 is a perspective view of a backrest for an automobile according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing another embodiment of the present invention.

4 is a cross-sectional view taken along the line BB of FIG.

FIG. 5 is a side view showing a state in which the automobile backrest of the present invention is used.

FIG. 6 is a side view showing a state where the vehicle is seated on a seat.

FIG. 7 is a side view showing a conventional automobile backrest.

[Explanation of symbols]

 1 Back support for automobiles 9,13 Projection 15 Back support surface

Claims (1)

[Scope of utility model registration request] 1. A backrest for an automobile, which is mounted on a backrest portion of a seat of a vehicle, wherein a protrusion projecting from the backrest surface and having a curved surface is provided at a position corresponding to a waist or a back of a human body. At the same time, the protrusion is formed in an asymmetrical shape in which the center of gravity of the protrusion is displaced upward with respect to the center of the protrusion width.