JP2010094448A - Cushion structure of chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the peripheral fringe of a cushion body from being everted and to enlarge ratio of thickness of a cushion part to the whole thickness. <P>SOLUTION: A cushion structure of a chair has a platelike core 1 in which the peripheral fringe becomes an inclined part 1a folded obliquely to the front side, a cushion body 2 formed in the front side face 1d of the core 1 and having a part 2a broaden to the end beyond the inclined part 1a and turning in the back side of the inclined part 1a, and a base 3 covering the core 1 and the part 2a broaden to the end. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cushion structure such as a lumbar support or armrest of a chair. More particularly, the present invention relates to a cushion structure for a chair of the type in which a cushion is molded on the front side surface of a core.

  As a cushion structure of a chair, for example, there is a lumbar support. An example of a lumbar support is disclosed in Japanese Patent Application Laid-Open No. 2004-49656. The lumbar support 101 is shown in FIG. The lumbar support 101 includes a lumbar support main body 102 and a cushion member 103. The cushion member 103 is formed by molding a cushion material 105 on the front surface of the base plate 104, and the periphery of the cushion material 105 wraps around the back side of the base plate 104.

  The cushion member 103 is locked to the front side surface of the lumbar support main body 102 by a retaining member 106. At this time, the cushion member 103 exactly overlaps the front side surface of the lumbar support main body 102 with the portion of the back surface of the base plate 104 where the periphery of the cushion material 105 does not go around. Accordingly, the portion of the cushion material 105 that wraps around the back side of the base plate 104 (hereinafter simply referred to as the wraparound portion 105a) is not covered by the lumbar support body 102 and is exposed.

  The lumbar support 101 is attached to and supported by a lumbar support support 111 attached to the back support rod 112.

  Another type of lumbar support 107 is shown in FIG. In this lumbar support 107, a cushion body 109 is foam-molded on the front side surface of the inner shell 108 whose periphery is bent obliquely to the back side. The peripheral edge 109 a of the cushion body 109 is wound around the back side of the inner shell 108. A lumbar base 110 is attached to the back side of the inner shell 108.

JP 2004-49656 A

  However, in the lumbar support 101 of FIG. 4, since the wraparound portion 105a of the cushion material 105 is exposed and not protected, the finger wraps around when the user of the chair tries to grasp the back support rod or the like, for example. The cushion material 105 may come off from the base plate 104 in some cases.

  Further, in the lumbar support 107 of FIG. 5, since a space 113 is generated between the shell body 108a of the inner shell 108 and the lumbar base 110, the cushion body 109 itself is used for the entire thickness T of the lumbar support 107. It is difficult to increase the thickness t.

  An object of this invention is to provide the cushion structure body of the chair which can prevent the peripheral part of a cushion body from curling. Another object of the present invention is to provide a cushion structure for a chair that can increase the ratio of the thickness of the cushion portion to the total thickness.

  In order to achieve such an object, the cushion structure of the chair according to claim 1 is a plate-like core that forms an inclined portion whose peripheral edge is obliquely bent to the front side, and is molded on the front side surface of the core, overcoming the inclined portion. A cushion body having a divergent part that wraps around the back side of the inclined part, and a base that covers the core and the divergent part from the back side.

  Therefore, the divergent part that is the periphery of the cushion body is protected by the base. In the core before molding the cushion body, the space on the back side of the inclined part becomes wider as it goes from the tip side of the inclined part to the back side, so the divergent part molded in this space expands toward the back, i.e., escapes from this space. Difficult shape. Since the inclined part of the core is bent toward the front side of the core, the main body part of the core can be overlapped with the base. The inclined portion of the core may be formed over the entire periphery of the core, or may be formed partially.

  In the chair cushion structure according to claim 2, the base has a convex portion that supports the side surface of the divergent portion. Therefore, the divergent portion of the cushion body is protected by the convex portion. Since the divergent portion of the cushion body is formed on the back side of the inclined portion, it is necessary to move the divergent portion outward in order to crawl the divergent portion. The convex portion prevents the outward movement of the divergent portion.

  Further, in the cushion structure of the chair according to claim 3, the inclined portion is provided with a hole that allows the material to pass through when the cushion body is molded. Accordingly, when the cushion body is molded, the material passes through the hole and flows into the back surface side of the inclined portion. In addition, the cushion bodies on both the front and back surfaces are connected by the cushion bodies in the holes with the inclined portion interposed therebetween.

  Further, the cushion structure of the chair according to claim 4 is such that the tip portion of the inclined portion is bent outward. Therefore, the base portion of the divergent portion is locked by the tip portion of the inclined portion.

  Furthermore, the cushion structure of the chair according to claim 5 is characterized in that the core is an inner shell of a lumbar support, the base is a lumbar base, and the cushion body is a lumbar support cushion. Therefore, lumbar support is configured.

  In the cushion structure of the chair according to claim 1, since the divergent part that is the periphery of the cushion body is protected by the base, even if the finger or the like is inserted near the cushion structure from the back side, the finger or the like However, it is difficult to hit the divergent part, and the peripheral edge of the cushion body can be made difficult to bend. Further, since the cushion body entrains the inclined portion of the core and the divergent portion has a shape that is difficult to be removed from the back side of the inclined portion, the cushion body can be made difficult to peel off from the core. Furthermore, since the core body part and the base can be overlapped, the ratio of the cushion body thickness to the overall thickness can be increased, and even if the cushion body thickness is sufficiently secured, the thickness of the entire cushion structure body Will not be so thick.

  Further, in the cushion structure of the chair according to claim 2, the divergent portion can be further protected by the convex portion, so that the finger or the like is less likely to hit the divergent portion, and the periphery of the cushion body is more difficult to bend. be able to. In addition, even if a finger or the like hits the divergent part, the convex part supports the divergent part from the outside, that is, from the direction of preventing the drooping. it can.

  Moreover, in the cushion structure of the chair according to claim 3, since the cushion body on the front side and the back side of the inclined portion can be connected through the hole, the cushion body can be further prevented from peeling off from the core. Moreover, it becomes easy to fill a material on the back side of the inclined portion when the cushion body is molded.

  Moreover, in the cushion structure of the chair according to claim 4, the base portion of the divergent portion can be locked by the tip portion of the inclined portion, so that the cushion body can be further prevented from being peeled off from the core.

  Furthermore, in the cushion structure of the chair according to claim 5, it is possible to provide a lumbar support in which the periphery of the cushion body is difficult to bend and the ratio of the thickness of the cushion body to the entire thickness can be increased.

  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

  1 to 3 show an example of an embodiment of the cushion structure of the chair of the present invention. The cushion structure of the chair is formed on the front side surface of the core 1 that forms the inclined portion 1a whose peripheral edge is obliquely bent to the front side, and goes over the inclined portion 1a to the back side of the inclined portion 1a. A cushion body 2 having a recessed wide end portion 2a and a base 3 that covers the core 1 and the wide end portion 2a from the back side are provided. In this embodiment, a case where it is applied to lumbar support will be described as an example. However, what can be applied is not limited to the lumbar support, and any body support member having a cushion function such as an armrest can be applied. When applied to a lumbar support, the core 1 is an inner shell and the base 3 is a lumbar base.

  The core 1 is, for example, a resin molded product. The inclined portion 1 a is provided on the periphery of the core 1. In this embodiment, the inclined portion 1a is provided over the entire periphery of the core 1 periphery. However, it is not necessary to provide the inclined portion 1a over the entire circumference, and the inclined portion 1a may be partially provided. In the present embodiment, the tip portion 1b of the inclined portion 1a is further bent outward (upward or downward in FIGS. 1 and 2). However, the front end portion 1b of the inclined portion 1a may not be bent outward. The inclined portion 1a is provided with a plurality of holes 1c at predetermined intervals along the periphery to allow the material to pass through when the cushion body 2 is molded. A plurality of cylindrical portions 1 e for screwing the base 3, for example, are provided on the front side surface 1 d of the core 1. The hole of the cylindrical part 1e is opened in the back side surface 1f of the core 1, and the internal peripheral surface is cut off with an internal thread.

  The cushion body 2 is, for example, foam-molded on the front side surface 1 d of the core 1. The peripheral edge of the cushion body 2 passes over the inclined portion 1a and spreads on the back side of the inclined portion 1a to form a divergent portion 2a.

  The base 3 is, for example, a resin molded product. On the periphery of the base 3, a convex portion 3a that supports the side surface of the divergent portion 2a is provided. The convex portion 3a supports, for example, the vicinity of the bottom of the divergent portion 2a from the outside. However, the convex part 3a may be formed high and the area supporting the divergent part 2a may be enlarged. Conversely, the convex part 3a may be formed low and the area supporting the divergent part 2a may be reduced. The convex portion 3a and the inclined portion 1a reduce the thickness of the base portion of the divergent portion 2a (the connecting portion with the portion on the front side surface 1d side of the core 1). The convex part 3a is provided over the entire periphery of the base 3 periphery. However, the convex portion 3a is not necessarily provided on the entire periphery of the periphery of the base 3, and may be provided partially. The base 3 is superposed on the back surface of the core 1 and the divergent portion 2a and is screwed to the base 3, for example. The base 3 is attached with a mounting plate 4 for mounting on a back frame of a chair, a back support rod or the like, for example.

  In this cushion structure, the divergent portion 2 a that is the periphery of the cushion body 2 is protected by the base 3 and the convex portion 3 a provided on the base 3. Therefore, even when a finger or the like is inserted near the cushion structure from the back side, the finger or the like is difficult to hit the divergent portion 2a, and even if it hits, the convex portion 3a makes the divergent portion 2a from the outside, That is, since it supports from the direction which prevents a twist, the periphery of the cushion body 2 can be made difficult to bend.

  Further, the cushion body 2 entrains the inclined portion 1a of the core 1, and the divergent portion 2a is thicker on the back side than the base portion, and has a shape that is difficult to be removed from the back side of the inclined portion 1a. The body 2 can be made difficult to peel off from the core 1. Furthermore, since the tip portion 1b of the inclined portion 1a is bent outward, the base portion of the divergent portion 2a can be locked, and the cushion body 2 can be made difficult to peel from the core 1 from this point. Further, by bending the tip portion 1b of the inclined portion 1a outward, the base portion of the divergent portion 2a can be thinned and the back side can be easily thickened.

  Moreover, since the hole 1c is provided in the inclined portion 1a, the front and back cushion bodies 2 of the inclined portion 1a can be connected through the hole 1c, and the cushion body 2 is further prevented from being peeled off from the core 1. In addition, it is easy to fill the space on the back side of the inclined portion 1a when the cushion body 2 is molded.

  Furthermore, since the core 1 and the base 3 can be overlapped, the ratio of the thickness t of the cushion body 2 to the entire thickness T can be increased, and even if the thickness t of the cushion body 2 is sufficiently secured, the cushion structure The thickness T of the whole body is not so thick. In other words, even if the cushion structure is thinned, it is easy to ensure the thickness t of the cushion body 2, and it is easy to ensure cushioning properties.

  For example, when the lumbar support (cushion structure) is disposed on the front surface of the backrest, it is difficult to increase the amount of protrusion from the backrest of the lumbar support, and it is difficult to increase the thickness T of the entire lumbar support. On the other hand, in order to secure the collapse amount of the cushion body 2 and improve the cushion performance, it is necessary to increase the thickness t of the cushion body 2 to some extent. In the present invention, since the ratio of the thickness t of the cushion body 2 to the entire thickness T can be increased, the thickness t of the cushion body 2 is secured while suppressing the increase in the overall thickness T, and the size and cushioning properties are reduced. Both improvement and improvement can be achieved at a high level. Therefore, it is possible to provide a lumbar support suitable for placing the backrest on the front surface. However, the lumbar support is not limited to the lumbar support disposed in front of the backrest, and may be a lumbar support disposed after the backrest.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, the convex portion 3a is provided on the base 3, but the convex portion 3a may be omitted. The divergent portion 2a can be protected by the base 3 even without the convex portion 3a.

  Further, in the above description, the hole 1c is provided in the inclined portion 1a of the core 1, but the hole 1c is not provided when the back side of the inclined portion 1a can be filled when the cushion body 2 is molded. May be.

  In the above description, the lumbar support is applied to the chair, but may be applied to a body support member having a cushion function other than the lumbar support. For example, it may be applied to an armrest.

  Furthermore, in the above description, the core 1 and the base 3 are made of resin. However, the core 1 and the base 3 are not necessarily made of resin, and may be made of metal, for example. For example, when applied to an armrest or the like, the base 3 may need strength. In such a case, a metal base 3 may be used to ensure strength as an armrest. Similarly, when the core 1 needs strength, the core 1 may be made of metal, for example.

  In the above description, the base 3 and the core 1 are overlapped. However, for example, a rib may be provided on the front side surface 1d of the base 3 to secure the strength, and the core 1 may be attached to the tip of the rib. .

It is sectional drawing which shows an example of embodiment of the cushion structure of the chair of this invention, and follows the II line | wire of FIG. It is sectional drawing which shows the cushion structure and follows the II-II line of FIG. It is a front view showing the cushion structure. It is sectional drawing which shows the conventional cushion structure. It is sectional drawing which shows another conventional cushion structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core 1a Inclined part 1b Tip part 1c of inclined part Hole 2 of inclined part Cushion body 2a Wide end part 3 Base 3a Base convex part

Claims (5)

  A cushioning body having a plate-like core that forms an inclined portion whose peripheral edge is bent obliquely to the front side, and a divergent portion that is molded on the front side surface of the core and wraps around the inclined portion to the back side of the inclined portion A chair cushion structure comprising a base that covers the core and the divergent portion from the back side.   The cushion structure for a chair according to claim 1, wherein the base has a convex portion that supports a side surface of the divergent portion.   The cushion structure for a chair according to claim 1, wherein the inclined portion is provided with a hole that allows a material to pass through when the cushion body is molded.   The cushion structure of the chair according to claim 1, wherein a tip portion of the inclined portion is bent outward.   The chair cushion structure according to claim 1, wherein the core is an inner shell of a lumbar support, the base is a lumbar base, and the cushion body is a cushion body of the lumbar support.

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