JP3221017U - Backrest cushion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To not only absorb and reduce the load applied to the waist and back when sitting on a seat with cushioning materials, but also stabilize the posture of the user's body, in particular the position and posture of the waist and back, and thereby sit down Provide a cushioned back cushion to alleviate. A cushion material (10) has a flexible backrest region (20) and left and right side regions (30), and the degree of flexibility of the backrest region (20) is greater than the flexibility of the side regions (30). The backrest region 20 is pushed by the back of the user's body so that the side region 30 is pulled to the backrest region 20 and is swung in a direction approaching the waist of the user's body. A latex foam with positive resilience is adopted for the backrest area 20 and a urethane foam is adopted for the side area 30. A cover 50 covering the cushioning material 10 is provided. [Selected figure] Figure 1

Description

  The present invention relates to a backrest cushion, and more particularly, to a backrest cushion in which measures can be taken to stabilize the posture of the user's body seated in a seat or the like to reduce fatigue and the like of the back and back.

  Conventionally, a cushion is interposed between the back portion of the seat and the user's body seated on the seat as a measure to reduce body fatigue caused by continuing driving a car for a long time in the same posture. Many measures have been taken to save.

  As a cushion of this type, there has been proposed a hip rest cushion configured to be in a state of pushing the waist when the user lowers the vehicle seat and extending the back and waist (see, for example, Patent Document 1). The backrest cushion proposed by Patent Document 1 is mainly aimed at reducing the load applied to the back of the driver sitting on a car seat (the same document as FIG. 1 (3), FIG. 2). it is conceivable that. In addition, as a cushion for an automobile capable of reducing driver's fatigue, an elastic body made of polyethylene high foam is partially disposed in the central longitudinal direction of the seat surface, or the elastic body is at the central and peripheral portions of the backrest. There is also a proposal for a partial arrangement of or in (see, for example, Patent Document 2). According to the cushion for a car proposed by Patent Document 2, it is supposed that the seating posture of the driver is stabilized by the elastic body, and the accumulation of fatigue during long time driving is reduced.

  On the other hand, as a foam layer capable of preventing fatigue or the like caused by stress or pressure coming from the hardness of a bed, a chair or the like, one employing latex foam is known (see, for example, Patent Document 3) . According to the foam layer proposed by Patent Document 3, it is supposed that the pressure received on the surface of the body is evenly dispersed by the positive repulsion exhibited by the characteristics of the latex foam, and the feeling of stress etc. can be alleviated. There is.

Japanese Utility Model Application Publication No. 53-32601 (FIG. 1 (3), FIG. 2) JP, 2014-237339, A Utility model registration 3070824 gazette

  However, all of those proposed by Patent Documents 1 to 3 reduce the load applied to the buttocks and the back at the time of sitting using the elasticity of the synthetic resin foam and the latex foam, and the waist It is not expected to reduce sitting fatigue by improving the stability of the position and posture of the back and back of a user such as a car driver, as well as relieving back fatigue.

  The present invention has been made in view of the above circumstances, and the user's body and seat seated on the backrest portion and seat of a seat such as a driver's seat or sofa while driving a car or using a chair or sofa in a living room In addition to being able to absorb and reduce the load applied to the back and back when sitting on the seat by cushioning materials such as latex foam, the posture of the user is basically In particular, it is an object of the present invention to provide a backrest cushion that helps stabilize the position and posture of the hips and back and significantly reduces the above-mentioned sitting fatigue.

  The backrest cushion according to the present invention is interposed between the backrest of the seat and the user's body seated on the seat. Then, there is a flexible backrest area in which the user's lower back portion is leaned, and a pair of side areas continuously connected to the backrest area and projecting to the left and right sides of the user's body. In addition to the cushioning material, the backrest region has a cushioning material whose degree of flexibility is larger than that of the side region.

  According to the hip cushion configured in this manner, the flexibility applied to the backrest area of the cushion material reduces the load on the user's waist and back seated on the seat and alleviates the feeling of fatigue ( Low back fatigue feeling relief). At the same time, when the backrest area of the cushioning material is pressed by the back of the user's body, the side area of the cushioning material is pulled toward the backresting area and swings and displaces in a direction approaching the user's body's waist A situation occurs in which the user's body waist is pinched by the left and right side areas. Then, the left and right side regions sandwich the waist of the user's body, and the softness of the backrest region is larger than the softness of the side region, in other words, the hardness of the side region is greater than the hardness of the backrest region. The synergy with the large size also stabilizes the position and posture of the user's body's waist and back so that the above-mentioned sitting fatigue is significantly reduced (sitting fatigue reducing action).

  In the present invention, a stealth recess formed by respective ends on both lateral sides of the upper half of the backrest area and upper ends of a pair of the side areas extending to the left and right sides of the user's body waist It is desirable to adopt a configuration in which the side area is made to project on both the left and right sides of the waist only at a portion corresponding to the waist of the user's body by respectively providing the above and the other on the left and right of the cushion material. . According to this, even if the user, for example, the driver of the car moves the left and right arms, the backrest area and the side area do not get in the way, so the above-mentioned "relief action of fatigue on the back" and "seat fatigue reduction" The user can freely move both arms without impairing the function.

  In the present invention, the backrest region in the cushioning material is a latex foam provided with positive resilience having a recess formed by an opening or a recess, and the side region in the cushioning material is a urethane foam. It is desirable to adopt the configuration. In this invention, the latex foam forming the backrest area of the cushion material has a unique elasticity excellent in the pressure dispersion power, ie, positive resilience, to uniformly support the entire body in contact with the latex foam. Since it has, the backrest area adapts well to the shape of the user's waist and back and exerts elasticity to envelop them, and the above-mentioned "relief action of fatigue on the lower back" is significantly exhibited. . In addition, there is also an advantage that it is less likely to cause discomfort due to humidity due to the breathability exhibited by the backrest region having a recessed portion formed of a through hole or recess. In addition, urethane foam that forms the side area can be easily manufactured such as one that exhibits a hard type (clicky hard feel) or a rubber type (touch with a repulsive force). Therefore, it has the advantage of being easy to exhibit the characteristic which is easy to exhibit the above-mentioned "seating fatigue reduction effect."

  In the present invention, the backrest area and the side area in the cushion material are configured such that the front surface is inclined so that the thickness gradually decreases from the lower end to the upper end, and the side area in the cushion material is It is possible to adopt a configuration in which the front surface is inclined so that the thickness gradually increases laterally outward from the boundary with the backrest region, and by adopting these configurations, It becomes possible to make the above-mentioned "relief in fatigue of the lower back" and "relief in seat fatigue" more remarkable.

  In the present invention, it is desirable to adopt a configuration in which the cushioning material and a flexible cover having air permeability covering the cushioning material are used. It is possible to select and use various materials such as cloth, leather, and paper for the cover, and by covering the cushion material with the cover, it is easy to improve the handleability and the touch of the cushion for the waist rest. Possible.

  As described above, according to the backrest cushion according to the present invention, “the waist is reduced to reduce the load applied to the waist and back when sitting on the seat during driving a car or using a chair or sofa in the living room” It is possible to stabilize the posture of the user's body, in particular, the position and posture of the user's back and back, and to reduce the above-mentioned "sitting fatigue" remarkably.

It is a partially broken perspective view of the backrest cushion which concerns on embodiment of this invention. It is a front view of a cushion material. It is sectional drawing in alignment with the III-III line of FIG. It is sectional drawing in alignment with the IV-IV line of FIG. It is a schematic perspective view showing a state in which a backrest cushion is arranged on a car seat. FIG. FIG.

  FIG. 1 is a partially cutaway perspective view of a hip cushion A according to an embodiment of the present invention. In the figure, 10 is a cushioning material and 50 is a cover.

  2 is a front view of the cushion 10, FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. As shown in FIG. 2, the cushion material 10 has a wide and tall backrest region 20 with flexibility and a pair of left and right side regions 30 continuously provided on the left and right sides of the lower half of the backrest region 20. And. The degree of flexibility of the backrest area 20 is greater than the degree of flexibility of the side area 30.

  In the cushion material 10, although a synthetic resin foam such as polyethylene foam or urethane foam, a resin sheet provided with a large number of cells, or a material having flexibility such as cotton cloth can be adopted for the backrest region 20, In the embodiment, a latex foam with positive resilience is employed. The positive resilience of the latex foam is the elasticity of sinking at a rate corresponding to the magnitude of the applied load and repelling from the inside with a force equal to the load. This positive resilience is a unique elasticity of the latex foam which is different from the flexibility of the above-mentioned synthetic resin foam, cotton cloth and the like.

  As shown in FIG. 1 or FIG. 2, the latex foam employed in the backrest region 20 of the cushioning material 10 has a recess 21 having a number of through openings throughout the entire area thereof. The heat sinking action and the moisture releasing action can be enhanced by these recessed portions 21. In addition, the recess 21 also serves to adjust the flexibility of the backrest region 20, and it is found that the flexibility is enhanced by increasing the number of the recesses 21 or increasing the size of the recess. There is. In this embodiment, although the recess 21 is formed by a through hole, this point may be formed by a non-through recess or by a slit hole or recess. Good. Further, the plurality of recesses 21 may be mixed with the passage and the recess.

  In the cushion material 10, although the pair of left and right side regions 30 continuously provided in the backrest region 20 also has a certain degree of flexibility, the degree of flexibility is smaller than the degree of flexibility of the backrest region 20. In other words, the hardness of the side region 30 is larger than the hardness of the backrest region 20. In this embodiment, urethane foam is employed in the side region 30. The urethane foam is obtained by the process of grinding the scrap of urethane generated in the manufacturing process, mixing the adhesive and compressing it. Among various urethane foams such as soft urethane foam, medium density urethane foam, and high density urethane foam, medium density urethane foam and high density urethane foam can be suitably adopted, and in particular, high density urethane foam It can be suitably employed in the side region 30 of the cushioning material 10 because it can obtain a hard feel (hard type) or a feel with a repulsive force (rubber type).

  In this embodiment, the cushion material 10 joins the latex foam in a front view rectangular shape forming the backrest region 20 and the urethane foam in a front view vertically rectangular shape forming the side regions 30 on the left and right sides of the backrest region 20. Thus, after the cushion material 10a having a rectangular shape in a front view shown by a phantom line in FIG. 2 is formed, it is manufactured by cutting out the left and right corner portions on the upper side of the cushion material 10a with a certain size. For this reason, as shown in FIG. 2, the cushion material 10 has left and right stolen recesses formed by the respective end portions on both sides in the lateral direction in the upper half of the backrest region 20 and the upper ends of the pair of side regions 30. The office 11 is equipped. In FIG. 2 and FIG. 4, reference numeral 15 indicates a junction between the backrest region 20 and the side region 30.

  As apparent from FIG. 3 or FIG. 4, the back surface 12 of the cushion 10 stands vertically from the lower surface 13, while the back region 20 of the cushion 10 and the front 14 of the side region 30 The thickness of the material 10 is inclined so as to gradually decrease from the lower end to the upper end. Further, in the left and right side regions 30 in the cushion material 10, the front surface 31 is inclined so that the thickness gradually increases toward the outside of the lateral direction W (FIG. 2 or FIG. 4) from the boundary with the backrest region 20. There is.

  On the other hand, the cover 50 shown in FIG. 1 is formed by sewing a stretchable cloth according to the shape of the cushion material 10. In the cover 50, air permeability is enhanced by adopting a mesh fabric 51 in portions covering the upper end surface and the left and right side surfaces of the cushion material 10.

  The use state and action of the hip cushion A described above will be described next. FIG. 5 is a schematic perspective view showing a state in which the hip cushion A is disposed on the automobile seat 100, FIG. 6 is an explanatory view of the use state, and FIG. 7 is an operation explanatory view.

  As shown in FIG. 5, the hip cushion A is placed on the seating portion 110 of the seat 100 in a standing posture and placed on the backrest portion 120. When the user is seated on the seat 100 as shown in FIG. 6, the waist back portion of the user's body is leaned against the backrest area 20 of the cushioning material 10 in the hip cushion A, whereas the cushioning material The ten side regions 30 are in a state of being extended to the left and right sides of the waist H of the user's body. In this state, the user can freely move the left and right hands without being disturbed by the hip cushion A.

  In addition, when the back area of the user's body is placed on the backrest area 20 of the cushioning material 10, as shown in FIG. 7, the flexibility of the backresting area 20 of the cushioning material 10 causes the user's body to The low back stress relief function is exerted that the burden on the waist and back is reduced and the feeling of fatigue is alleviated. Furthermore, the relatively hard side region 30 of the cushion material 10 is pulled by the backrest region 20 so that the backrest region 20 of the cushion material 10 is pressed as indicated by the arrow P by the back of the user's body. In the direction approaching the waist H of the person's body, it is swung and displaced as shown by the arrow F. Therefore, the waist of the user's body is sandwiched by the left and right side regions 30 of the cushion 10, and the position and posture of the waist and back are stabilized. In order to stabilize the position and posture of the lower back at this time, it is useful that the front surface of the side region 30 of the cushion material 10 is inclined and the side region 30 is harder than the backrest region 20. This also helps to enhance the action of reducing the tiredness of the user by unreasonably stabilizing the posture of the user's body, especially the position and posture of the back and back.

  Furthermore, in this embodiment, since the latex foam with positive resilience is adopted for the backrest region 20 in the cushion material 10, the entire body in contact with the hip cushion A is uniformly supported and fatigue of the lower back The feeling relief effect is prominently exhibited.

  Although the case where the usage target of the hip cushion A according to the embodiment is the seat 100 as a car seat has been described in FIGS. 5 to 6, the hip cushion A is not limited to a car seat and is a sofa in a living room It can be used with a variety of seating such as chairs, park benches, train seats etc.

A backrest cushion 11 stealing recess 14 front surface of cushioning material 20 backrest region 21 dent portion 30 side region 31 front of side region 50 cover 100 seat 120 backrest

Claims (6)

A backrest cushion interposed between a backrest of a seat and a user's body seated on the seat,
It has a flexible backrest area in which the user's lower back portion is leaned, and a pair of side areas continuously connected to the backrest area and extending to the left and right sides of the user's back waist. A back rest cushion comprising a cushion material having a degree of flexibility of the backrest area greater than that of the side area.   The above-mentioned cushion is formed of a stealth recess formed by the respective lateral lateral ends in the upper half of the backrest region and the respective upper ends of the pair of the side regions overhanging the left and right sides of the user's body waist. The waist rest cushion according to claim 1, wherein the side area is made to project on both the left and right sides of the waist only at a portion corresponding to the waist of the user body by being provided respectively on the left and right of the material.   The said back region in the said cushioning material consists of a latex foam provided with the positive-repulsive property which has a recessed part which becomes an opening or a recess, The said side area | region in the said cushioning material consists of a urethane foam. Back cushion as described in 2.   The waist pad according to any one of claims 1 to 3, wherein the backrest area and the side area in the cushioning material have a front surface inclined such that the thickness gradually decreases from the lower end toward the upper end. cushion.   The front surface is inclined such that the thickness gradually increases in the lateral direction from the boundary with the backrest region in the side region of the cushion material. Backrest cushion described.   The waist cushion according to any one of claims 1 to 5, comprising the cushioning material and a flexible cover having air permeability covering the cushioning material.

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