Cushion body and method for adjusting the hardness of the cushion body

Abstract

To provide a cushion body on which hardness on a desired part can be adjusted according to taste of a user, and in which reduction of industrial waste in a production process can be achieved relative to prior arts.SOLUTION: A cushion body comprises: a body member 1 having elasticity; and a first adjustment member 2 and a second adjustment member 3 which are formed of a same material as the body member 1. The body member 1 comprises on a surface, a linear first recess groove 11 and a linear second recess groove 12, the first adjustment member 2 and the second adjustment member 3 are rod-shaped, and a cross sectional shape perpendicular to a longitudinal direction of the first adjustment member 2 and the second adjustment member 3 is same as a cross sectional shape perpendicular to an extension direction of the first recess groove 11 and the second recess groove 12. In a reference mode of the body member 1, the first adjustment member 2 is fitted to the first recess groove 11 and the second adjustment member 3 is fitted to the second recess groove 12, therefore the first recess groove 11 and the second recess groove 12 are not apparent, and when the first adjustment member 2 and the second adjustment member 3 are detached from the first recess groove 11 and the second recess groove 12, the first recess groove 11 and the second recess groove 12 become apparent, and hardness of the body member 1 is partially adjusted.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cushion body that can be used for mattresses and the like, and a method for adjusting the hardness of the cushion body.

Background Art

[0002] General functions required for cushion bodies such as mattresses and floor cushions include cushioning properties, heat retention properties, and cleanliness, but the functions required for these cushion bodies vary depending on the user's situation and preferences.

[0003] Accordingly, various techniques have been proposed so far in which a mattress is divided into a plurality of zones corresponding to parts of the body, and the hardness of each zone is changed to appropriately disperse the body pressure on each part of the user's body.

[0004] One of the present applicants has also proposed a mattress formed by arranging a plurality of block bodies having a laminated structure in the longitudinal direction and / or the transverse direction, in which the hardness of the block bodies can be adjusted by replacing desired layers (Patent Document 1), and a mattress in which the hardness of a desired portion of the base can be adjusted by attaching the hardness adjusting member 2 by engaging a through hole with a convex portion provided on the surface of the base portion of the mattress (Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problem to be Solved by the Invention

[0006] In recent years, there has been a growing societal effort to achieve the Sustainable Development Goals (SDGs). As part of the SDGs, particularly "responsible production," there is a growing social demand for reducing industrial waste. Therefore, the object of the present invention is to provide a cushion body in which the hardness of desired parts can be adjusted according to the user's preferences, and which also reduces industrial waste in the manufacturing process compared to conventional products. [Means for solving the problem]

[0007] A cushion body according to one aspect of the present invention that achieves the above objective is a plate-shaped cushion body comprising an elastic main body member and a plurality of hardness adjusting members, wherein the main body member has a plurality of linear grooves on at least one of its front and back surfaces, the hardness adjusting members are rod-shaped, the cross-sectional shape of the hardness adjusting member perpendicular to the longitudinal direction is the same as the cross-sectional shape perpendicular to the extension direction of the grooves, and in the standard embodiment of the main body member, the hardness adjusting members are fitted into the grooves and the grooves are not made visible, and when the hardness adjusting members are removed from the grooves, the grooves become visible and the hardness of the main body member is partially adjusted.

[0008] In the cushion body having the above configuration, it is preferable that the direction in which the hardness adjusting member is removed from the groove is in the thickness direction of the main body member, and that the cross-sectional shape perpendicular to the extending direction of the groove and the cross-sectional shape perpendicular to the longitudinal direction of the hardness adjusting member have a widened portion with a width greater than the width of the tip of the hardness adjusting member in the removal direction. In this case, it is preferable that the shape of the widened portion is such that the width is smallest at the rear end in the direction of removal of the hardness adjustment member, and it increases continuously toward the front end in the direction of removal.

[0009] In the cushion body having the above configuration, it is preferable that the grooves have two or more types of grooves with different depths, and that the hardness adjusting member has two or more types of hardness adjusting members corresponding to the two or more types of grooves with different depths.

[0010] In the cushion body having the above configuration, it is preferable that the groove has a first groove and a second groove that is deeper than the first groove, and that the hardness adjusting member has a first adjusting member corresponding to the first groove and a second adjusting member corresponding to the second groove.

[0011] In the cushion body having the above configuration, it is preferable that the widening portion is provided in multiple locations in the direction of removal of the hardness adjustment member.

[0012] In the cushion body with the above configuration, the first groove and the first adjustment member may have one widening portion, and the second groove and the second adjustment member may have two widening portions in the direction of removal of the second adjustment member.

[0013] In the cushion body having the above configuration, it is preferable that a connecting portion is provided between the two widening portions of the second adjustment member, which is less than or equal to the width of the tip of the hardness adjustment member in the removal direction and can be cut in the extending direction of the second adjustment member.

[0014] In the cushion body having the above configuration, it is preferable that, in a plan view, the groove is linear and continuously formed from one peripheral end of the main body member to the opposite peripheral end.

[0015] In the cushion body having the above configuration, the main body member may further have a plurality of linear grooves on the surface and / or back surface where the groove is formed, in a direction intersecting the groove. Here, it is preferable that the depth of the linear grooves is shallower than the depth of the groove.

[0016] Furthermore, according to the present invention, a method for adjusting the hardness of a cushion is provided, characterized in that the hardness of the cushion is partially adjusted by making the groove visible by removing the hardness adjustment member from the groove in the standard configuration of the cushion described above.

[0017] In the cushion body configured as described above, the hardness adjusting member may be cut at the notched portion of the hardness adjusting member provided by the linear groove, and a part of the hardness adjusting member may be removed from the recessed groove to partially adjust the hardness of the cushion body. Effects of the Invention

[0018] According to the cushion body of the present invention, the hardness of a desired portion can be adjusted in accordance with the user's preference and the like, and industrial waste in the manufacturing process can be reduced as compared with the prior art. Brief Description of the Drawings

[0019] [Figure 1] It is a perspective view of a cushion body according to one aspect of the present invention. [Figure 2] It is a partially enlarged perspective view of the cushion body of Fig. 1. [Figure 3] It is a perspective view of a first adjusting member in the cushion body of Fig. 1. [Figure 4] It is a perspective view of a second adjusting member in the cushion body of Fig. 1. [Figure 5] It is a perspective view showing an example in which a part of the second adjusting member is cut off. [Figure 6] It is a perspective view showing another example in which a part of the second adjusting member is cut off. [Figure 7] It is a cross-sectional view of a main body member to which the second adjusting member partially cut off is attached. [Figure 8] It is a plan view of a mattress in which three cushion bodies of the first embodiment are connected in the X direction. [Figure 9] It is a perspective view of a mattress in which three cushion bodies of Fig. 1 are connected. Modes for Carrying Out the Invention

[0020] Hereinafter, the cushion body according to the present invention will be described in detail based on the drawings, but the present invention is not limited to these embodiments at all. In this specification, the X direction, Y direction, and thickness direction refer to the X direction, Y direction, and thickness direction in each figure. Furthermore, numerical ranges indicated using "~" in this specification include the minimum and maximum values ​​indicated before and after the "~".

[0021] The cushion body C according to one aspect of the present invention, shown in Figures 1 and 2, comprises a main body member 1 having elasticity in the shape of a rectangular plate in plan view, and a first adjustment member 2 and a second adjustment member 3 fitted into linear first grooves 11 and 2 grooves 12 extending in the X direction provided on the upper surface of the main body member 1. Both the first adjustment member 2 and the second adjustment member 3 constitute hardness adjustment members in the present invention. In Figure 2, the first adjustment member 2 and the second adjustment member 3 are colored gray to distinguish them from the first groove 11 and the second groove 12, and from the first adjustment member 2 and the second adjustment member 3. In Figure 7, the second adjustment member 3 is also colored gray for the same reason.

[0022] (Main body components) The main body component 1 is made of an elastic material. For example, polyurethane foam, latex, and polyethylene are suitable. Among these, polyurethane foam is preferred from the viewpoint of pressure distribution and processability. As for polyurethane foam, a three-dimensional mesh structure without cell membranes is recommended because it has breathability and water permeability functions. There are no particular limitations on the thickness T of the main body component 1 (shown in Figure 1), but it is usually preferable to be in the range of 20 mm to 300 mm.

[0023] As shown in Figure 1, the upper surface of the main body member 1, which is rectangular in plan view, has first linear grooves 13 extending linearly in the Y direction and provided at predetermined intervals in the X direction. Additionally, second linear grooves 14 extending linearly in the X direction are provided at predetermined intervals in the Y direction. The upper surface of the main body member 1 is divided into a grid pattern by the first linear grooves 13 and the second linear grooves 14. The first linear grooves 13 and the second linear grooves 14 play roles in adjusting the hardness of the main body member 1 and providing ventilation. Regarding the adjustment of the hardness of the main body member 1, the shorter and deeper the spacing between the first linear grooves 13 and the second linear grooves 14, the softer the hardness of the main body member 1 becomes.

[0024] There are no particular limitations on the spacing and depth of the first linear groove 13 and the second linear groove 14, and they can be appropriately determined to achieve the desired hardness in the standard embodiment of the cushion body C described later. In this embodiment, the depth d1 of the first linear groove 13 is set to be shallower than the depth D1 of the first recessed groove 11 described later. The reason for this will be explained later. Note that either one or both of the first linear groove 13 and the second linear groove 14 do not need to be formed in the main body member 1, but from the viewpoint of providing breathability for the cushion body C, it is preferable that at least one of the first linear groove 13 and the second linear groove 14 is formed in the main body member 1.

[0025] Furthermore, as shown in Figures 1 and 2, the upper surface of the main body member 1 is provided with a plurality of linear first grooves 11 and second grooves 12 extending in the X direction at predetermined intervals L1 in the Y direction. First adjustment members 2 and second adjustment members 3 (both hardness adjustment members) are fitted into all of the first grooves 11 and second grooves 12, respectively, having the same cross-section as the cross-section perpendicular to the X direction of the first grooves 11 and second grooves 12.

[0026] In this specification, the configuration in which the first adjustment member 2 and the second adjustment member 3 are fitted into all of the first groove 11 and the second groove 12 is referred to as the "standard configuration." The first adjustment member 2 and the second adjustment member 3 are made of the same material as the main body member 1, and in the standard configuration, the first adjustment member 2 and the second adjustment member 3 are fitted into all of the first groove 11 and the second groove 12. Therefore, in the standard configuration, the first groove 11 and the second groove 12 are not visible.

[0027] The first groove 11 and the second groove 12 are formed by two-dimensional cutting of a plate-like body having a thickness T, which is a precursor of the main body member 1. When the first groove 11 and the second groove 12 are formed by two-dimensional cutting, the first adjustment member 2 and the second adjustment member 3 remain inside the first groove 11 and the second groove 12 as cut scraps. In other words, the first groove 11 and the first adjustment member 2, and the second groove 12 and the second adjustment member 3 are formed simultaneously by two-dimensional cutting. The standard form of the main body member 1 is the state after two-dimensional cutting of the main body member 1. For example, a contour cutter is preferably used for two-dimensional cutting of the plate-like body that is a precursor of the main body member 1. The first linear groove 13 and the second linear groove 14 are also preferably formed by two-dimensional cutting of the main body member 1. Furthermore, the first adjustment member 2 and the second adjustment member 3 may be manufactured separately from the formation of the first groove 11 and the second groove 12. In this case, the first adjustment member 2 and the second adjustment member 3 can be made of different materials than the main body member 1.

[0028] (First groove 11, first adjustment member 2) Due to the manufacturing method of the main body member 1 described above, the cross-sectional shape perpendicular to the extending direction (X direction) of the first groove 11 and the cross-sectional shape perpendicular to the longitudinal direction (X direction) of the first adjustment member 2 are identical. Strictly speaking, the outer shape of the first adjustment member 2 is smaller than the inner shape of the first groove 11 by the thickness of the cutter blade (less than 1 mm), but since the difference between the outer and inner shapes is slight, they will be treated as identical in this specification. The cross-sectional shape of the first adjustment member 2 will be described below as a representative example.

[0029] As shown in Figures 2 and 3, the first adjustment member 2 has a narrow section 21 with a width W1 and a widened section 22 with a maximum width W2 that is wider than the width W1, starting from the tip side in the direction of removal from the main body member 1 (upward in the thickness direction). Because the first adjustment member 2 has a widened section 22, the first adjustment member 2 is removable from the main body member 1, but it is prevented from coming off the main body member 1 unintentionally.

[0030] The narrow section has a width W1 and a desired length in the thickness direction. There are no particular limitations on the width W1 of the narrow section 21, but it is usually preferably in the range of 1 mm to 10 mm. There are also no particular limitations on the length of the narrow section 21 in the thickness direction, but it is usually preferably in the range of 5 mm to 10 mm.

[0031] The cross-sectional shape of the widening section 22 is an inverted triangle, with the width being smallest at the bottom in the thickness direction, and continuously increasing towards the top in the thickness direction, until it reaches its maximum width W2, at which point it narrows parallel to the Y direction from both ends in the Y direction toward the center and connects to the bottom end in the thickness direction of the narrowing section 21. The maximum width W2 of the widening section 22 is not particularly limited as long as it is greater than the width W1 of the narrowing section 21, but from the viewpoint of ensuring that the first adjustment member 2 can be easily removed from the main body member 1 but does not come off unintentionally, it is preferable to set it to be 4 mm to 20 mm larger than the width W1 of the narrowing section 21. The length of the widening section 22 in the thickness direction is also not particularly limited, but it is usually in the range of 10 mm to 20 mm.

[0032] The first adjustment member 2 extends in the X direction and has multiple notches 24 formed at intervals of length L2. The notches 24 have a width L3 in the X direction and a depth d1. The depth d1 of the notches 24 is shallower than the depth D1 of the first adjustment member 2 (first groove 11). Due to the notches 24, the first adjustment member 2 consists of multiple first block bodies B1 of length L2 connected in the X direction by a first connecting portion 23. The difference between the depth D1 of the first adjustment member 2 and the depth d1 of the notches 24, i.e., the length of the first connecting portion 23 in the thickness direction, is not particularly limited as long as the first block bodies B1 can be cut by hand, and is usually preferably in the range of 2 mm to 5 mm. Similarly, the length L3 of the first connecting portion 23 in the X direction is not particularly limited as long as the first block bodies B1 can be cut by hand, and is usually preferably in the range of 2 mm to 10 mm. The notch 24 of the first adjustment member 2 is formed when the first linear groove 13 is formed in the main body member 1 during the manufacturing of the cushion body C.

[0033] The first adjustment member 2, having such a structure, can be easily cut at the first connection portion 23 at a desired position, and the first adjustment member 2 can be divided into multiple first block bodies B1. When adjusting the hardness of the main body member 1, if only a portion of the first adjustment member 2 in the X direction is to be removed from the main body member 1, the entire first adjustment member 2 is first removed from the first groove 11 of the main body member 1. Then, the desired portion of the first adjustment member 2 is cut off using the first connection portion 23. After that, the first adjustment member 2 excluding the cut-off portion is returned to the first groove 11 of the main body member 1. In this way, only the desired portion of the first adjustment member 2 in the X direction can be removed from the main body member 1, and the hardness of that portion can be adjusted.

[0034] (Second groove 12, second adjustment member 3) Similar to the first groove 11 and the first adjustment member 2, the second groove 12 and the second adjustment member 3 also have the same cross-sectional shape perpendicular to the extension direction (X direction) of the second groove 12 and the second adjustment member 3 perpendicular to the longitudinal direction (X direction), due to the manufacturing method of the main body member 1 described above. However, as mentioned above, strictly speaking, the outer shape of the second adjustment member 3 is smaller than the inner shape of the second groove 12 by the thickness of the cutter blade (less than 1 mm). Below, the cross-sectional shape of the second adjustment member 3 will be described as a representative example.

[0035] As shown in Figures 2 and 4, the second adjustment member 3 has, in order from the top in the thickness direction, a first narrow section 31 with a width W1, a first wide section 32 with a width W2, a second connecting section 33 with a width W3, and second wide sections 35 with a width W2. In other words, the second adjustment member 3 has a shape that has another wide section 35 on the lower side in the thickness direction of the first adjustment member 2 via the second connecting section 33. The first narrow section 31 of the second adjustment member 3 has the same shape as the narrow section 21 of the first adjustment member 2, and the first wide section 32 and the second wide section 35 of the second adjustment member 3 have the same shape as the wide section 22 of the first adjustment member 2, so their explanation will be omitted here, and the configuration that differs from the first adjustment member 2 will be described below.

[0036] The second connecting portion 33 of the second adjustment member 3 connects the first widening portion 32 and the second widening portion 35 in a way that allows it to be cut by hand, as will be described later. There are no particular limitations on the width W3 of the second connecting portion 33, but it is generally preferred to be in the range of 1 mm to 10 mm. There are also no particular limitations on the length in the thickness direction of the second connecting portion 33, but it is generally preferred to be in the range of 5 mm to 10 mm.

[0037] The second adjustment member 3, like the first adjustment member 2, extends in the X direction and has multiple notches 34 formed at intervals of length L2. The notches 34 have a width of L3 and a depth of d1 in the X direction. The depth d1 of the notches 34 is shallower than the combined depth of the first narrow section 31 and the first widening section 32. The notches 34 of the second adjustment member 3, like the notches 24 of the first adjustment member 2, are formed by forming the first linear groove 13 in the main body member 1 during the manufacturing of the main body member 1.

[0038] The second adjustment member 3, having such a structure, can be cut in the thickness direction using a notch 34 at a desired position, and the second adjustment member 3 can be divided into multiple second block bodies B2 (see Figure 5).

[0039] Furthermore, the second adjustment member 3 can also be cut in the X direction using the second connection portion 33 (see Figure 6). That is, the second adjustment member 3 can also be separated vertically at the second connection portion 33. The upper portion of the second adjustment member 3, separated vertically, has substantially the same shape as the first adjustment member 2 and can be divided into each first block body B1.

[0040] When adjusting the hardness of the main body member 1, if only a portion of the second adjustment member 3 in the X direction is to be removed from the main body member 1, the entire second adjustment member 3 is removed from the second groove 12 of the main body member 1, similar to the case of the first adjustment member 2. Then, the desired portion of the second adjustment member 3 is cut off. After that, the remaining portion of the second adjustment member 3 is returned to the second groove 12 of the main body member 1.

[0041] (Method for adjusting the hardness of the main body component 1) The hardness of the main body member 1 is adjusted, for example, as follows: From a standard configuration in which the first adjustment member 2 and the second adjustment member 3 are fitted into the first groove 11 and the second groove 12 of the main body member 1, the first adjustment member 2 and / or the second adjustment member 3 are removed from the main body member 1 in the area where the hardness of the main body member 1 is to be softened. The removal of the first adjustment member 2 and / or the second adjustment member 3 from the main body member 1 may be the entire area in the X direction or only a part of it. The hardness of the area of ​​the main body member 1 from which the first adjustment member 2 and / or the second adjustment member 3 have been removed will be softer than the other areas. When removing the first adjustment member 2 and / or the second adjustment member 3, it is recommended to bend the upper surface of the main body member 1 into a convex shape so that the surface openings of the first groove 11 and the second groove 12 are widened. This makes it easier to remove the first adjustment member 2 and / or the second adjustment member 3 from the main body member 1.

[0042] As mentioned above, when removing the first adjustment member 2 and / or the second adjustment member 3 from the main body member 1, even if only a portion of the first adjustment member 2 and / or the second adjustment member 3 in its extending direction (X direction) is to be removed from the main body member 1, it is preferable from the viewpoint of work efficiency and other factors to first remove the entire first adjustment member 2 and / or the second adjustment member 3 extending in the X direction from the main body member 1.

[0043] When removing a portion of the first adjustment member 2 in the X direction from the main body member 1, the entire portion of the first adjustment member 2 in the X direction is removed from the main body member 1, and then the desired portion of the first adjustment member 2 is cut off using the first connecting portion 23. It is preferable to treat the first block body B1 between the notches 24 as a single unit for the cut-off. After that, the remaining portion of the first adjustment member 2 is attached to the first groove 11 of the main body member 1 in the reverse order of removal.

[0044] When removing a portion of the second adjustment member 3 in the X direction from the main body member 1, the entire portion of the second adjustment member 3 in the X direction is removed from the main body member 1 first, and then the desired portion of the second adjustment member 3 is cut off. There are two types of partial cutting of the second adjustment member 3.

[0045] In the first mold, as shown in Figure 5, the notch 34 is cut downwards in the thickness direction to separate and cut out a portion of the second adjustment member 3. It is preferable to treat the second block body B2 between the notches 34 as a single unit for this cutting. After that, the second adjustment member 3, excluding the cut-out portion, is returned to the second groove 12 of the main body member 1 in the reverse order of removal.

[0046] In the second type, as shown in Figure 6, the second connecting portion 33 is cut in the X direction to cut out a portion of the first narrow portion 21 and the first wide portion 22 from the second adjustment member 3. In such cutting, it is preferable to treat the first block body B1 between the notches 34 as a single unit. After that, the second adjustment member 3, excluding the cut-out portion, is returned to the second groove 12 of the main body member 1 in the reverse procedure of when it was removed.

[0047] Figure 7 shows a cross-sectional view of the second adjustment member 3, from which parts of the first block body B1 and the second block body have been removed, attached to the second groove 12. In Figure 7, the second adjustment member 3 is colored gray for easier understanding. In the second adjustment member 3 in Figure 7, the second block body, second from the right, has been cut out, and the first block body B1, second from the left, has been cut out.

[0048] As a procedure for adjusting the hardness of the main body member 1, in addition to the procedure described above, for example, if the entire X-direction of the first narrow portion 21 and the first wide portion 22 of the second adjustment member 3 is removed from the main body member 1, and the entire X-direction of the second wide portion 35 of the second adjustment member 3 is left in the second groove 12, then after removing the entire X-direction of the second adjustment member 3 from the main body member 1, the first adjustment member 2 that was removed in other areas may be attached to the second wide portion 35 of the second groove 12. With this method, the work of dividing the second adjustment member 3 vertically at the second connection portion 33 becomes unnecessary, and work efficiency is increased.

[0049] (Example of use) Figure 8 shows an example of a mattress M using the cushion body C of the first embodiment. In the mattress M of Figure 8, three cushion bodies C1, C2, and C3 (hereinafter sometimes collectively referred to as "cushion bodies C") are connected in the X direction. In each cushion body C, in the area where the user moves, such as when turning over in bed, the first adjustment member 2 and / or the second adjustment member 3 are removed from the main body member 1, and the first groove 11 and / or the second groove 12 become visible, making the hardness of the main body member 1 lower than in other parts. The part where the second recess is visible is softer than the part where the first groove 11 is visible. In the mattress M shown in Figure 8, the parts where the first groove 11 or the second groove 12 is visible are represented by thick black lines.

[0050] Specifically, in the area where the shoulders and heels of a person lying supine on mattress M are located, the second adjustment member 3 is removed from the main body member 1 to expose the second groove 12, making it the softest. In the area where the torso and thighs are located, the first adjustment member 2 is removed from the main body member 1 to expose the first groove 11, making it the second softest. On the other hand, in the area where the head and waist are located, the first adjustment member 2 and the second adjustment member 3 are not removed from the main body member 1, making it the hardest.

[0051] As shown in Figure 9, in actual use, each cushion C is housed in a cover 4 made of fabric or the like, which has a volume slightly larger than that of the cushion C. A zipper 41 is provided that runs longitudinally in the Y direction from the middle of one side of the cover 4 in the Y direction to the middle of the other side in the Y direction, traversing the entire X-side of the cover. When the zipper 41 is opened, the opening of the cover 4 opens, and the cushion C is housed inside the cover 4. Furthermore, if the cushion C is a laminate of a main body member 1 and other plate-like members, it is sufficient to house the main body member 1 and the plate-like members inside the cover C, and there is no need to connect and fix the main body member 1 and the plate-like members.

[0052] The connection between the cushion bodies C housed in the cover 4 is made by a pair of connecting members 42a and 42b, which may be hook-and-loop fasteners, provided on the upper and lower surfaces of the cover 4 at a predetermined distance apart in the Y direction. In the mattress M shown in Figure 9, three cushion bodies C are connected in the X direction, but there is no limit to the number of cushion bodies C that can be connected. Furthermore, the cushion bodies C may be connected in the Y direction, or they may be connected in two directions, the X and Y directions.

[0053] Furthermore, the cushion body C according to the present invention can be used not only as a mattress M, but also as a seat cushion or the like.

[0054] (others) Although embodiments of the present invention have been described in detail above with reference to the drawings, the configurations and combinations thereof in the above embodiments are merely examples, and additions, omissions, substitutions, and other modifications to the configurations are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited by the embodiments, but is limited only by the claims.

[0055] For example, in the above embodiment, the first groove 11 and the second groove 12 extended in the X direction at predetermined intervals in the Y direction, but they may also be configured to extend in the Y direction at predetermined intervals in the X direction. Furthermore, the first groove 11 and the second groove 12 may extend in two directions, the X direction and the Y direction. The first groove 11 and the second groove may be straight or curved. Moreover, the grooves formed in the main body member may be of one type or three or more types.

[0056] Furthermore, although the shape of the main body member 1 in plan view was rectangular in the above embodiment, there are no particular limitations on the shape of the main body member 1 in plan view, and it may be polygonal or circular, etc. In the above embodiment, the first linear groove 13 and the second linear groove 14 were provided only on the upper surface of the main body member 1, but they may be provided on both the upper and lower surfaces, or only on the lower surface. Also, either the first linear groove 13 or the second linear groove 14 may be provided, or neither may be provided. Whether or not to provide the first linear groove 13 and the second linear groove 14 should be appropriately determined based on how the hardness of the main body member 1 in the standard embodiment should be, etc.

[0057] The cushion C according to the present invention may have a structure in which plate-shaped members are laminated in the thickness direction of the main body member 1. Examples of members to be laminated include elastic members with different hardness from the cushion body, or mesh-like resin structures. [Industrial applicability]

[0058] The cushion body according to the present invention allows for adjustment of the hardness of desired parts to suit the user's preferences, and also reduces industrial waste in the manufacturing process compared to conventional methods. [Explanation of Symbols]

[0059] 1 Main body component 2. First adjustment member (hardness adjustment member) 3. Second adjustment member (hardness adjustment member) 4 Covers C, C1, C2, C3 Cushion Body M Mattress 11 First groove 12 Second groove 13 1st linear groove 14 2nd linear groove 21 Narrow section 22 Widening section 23. First connection section 24 Notches 31 Narrow section 32 First widening section 33 Second connection section 34 Notches 35. Second widening section B1 1st Block B2 Block 2

Claims

1. A plate-shaped cushion body comprising an elastic main body member and a plurality of hardness-adjusting members, The main body member has a plurality of linear grooves on at least one of its front and back surfaces, The hardness adjusting member is rod-shaped, and the cross-sectional shape perpendicular to the longitudinal direction of the hardness adjusting member is the same as the cross-sectional shape perpendicular to the extension direction of the groove. In the standard configuration of the main body member, the hardness adjustment member is fitted into the groove and the groove is not made visible. When the hardness adjustment member is removed from the groove, the groove becomes visible and the hardness of the main body member is partially adjusted. The direction in which the hardness adjustment member is removed from the groove is in the thickness direction of the main body member. The cross-sectional shape perpendicular to the extending direction of the groove and the cross-sectional shape perpendicular to the longitudinal direction of the hardness adjustment member have a widened portion that is wider than the width of the tip of the hardness adjustment member in the removal direction. A cushion body characterized by the following features.

2. The cushion body according to claim 1, wherein the shape of the widened portion is such that the width is smallest at the rear end in the removal direction of the hardness adjustment member, and it increases continuously toward the front end in the removal direction.

3. The groove has two or more types of grooves with different depths, The cushion body according to claim 1 or 2, wherein the hardness adjusting member comprises two or more hardness adjusting members corresponding to two or more grooves of different depths.

4. The groove comprises a first groove and a second groove that is deeper than the first groove. The cushion body according to claim 3, wherein the hardness adjusting member comprises a first adjusting member corresponding to the first groove and a second adjusting member corresponding to the second groove.

5. The cushion body according to claim 4, wherein a plurality of widening portions are provided in the direction of removal of the hardness adjustment member.

6. The cushion body according to claim 4, wherein the first groove and the first adjustment member have one widening portion, and the second groove and the second adjustment member have two widening portions in the direction of removal of the second adjustment member.

7. The cushion body according to claim 6, wherein a connecting portion is provided between the two widening portions of the second adjustment member, the connecting portion being less than or equal to the width of the tip portion of the hardness adjustment member in the removal direction and cuttable in the extending direction of the second adjustment member.

8. The cushion body according to claim 1 or 2, wherein the main body member further has a plurality of linear grooves on the surface and / or back surface where the groove is formed, in a direction intersecting the groove.

9. The cushion body according to claim 8, wherein the depth of the linear groove is shallower than the depth of the concave groove.

10. In the cushion body according to claim 9, A method for adjusting the hardness of a cushion body, characterized by cutting the hardness adjusting member at a notch provided by the linear groove, thereby removing a portion of the hardness adjusting member from the groove and partially adjusting the hardness of the cushion body.

11. A plate-shaped cushion body comprising an elastic main body member and a plurality of hardness-adjusting members, The main body member has a plurality of linear grooves on at least one of its front and back surfaces, The hardness adjusting member is rod-shaped, and the cross-sectional shape perpendicular to the longitudinal direction of the hardness adjusting member is the same as the cross-sectional shape perpendicular to the extension direction of the groove. In the standard configuration of the main body member, the hardness adjustment member is fitted into the groove and the groove is not made visible. When the hardness adjustment member is removed from the groove, the groove becomes visible and the hardness of the main body member is partially adjusted. The groove has two or more types of grooves with different depths, The hardness adjustment member has two or more hardness adjustment members corresponding to the two or more grooves of different depths. A cushion body characterized by the following features.

12. The direction in which the hardness adjustment member is removed from the groove is in the thickness direction of the main body member. The cushion body according to claim 11, wherein the cross-sectional shape perpendicular to the extending direction of the groove and the cross-sectional shape perpendicular to the longitudinal direction of the hardness adjusting member have a widened portion with a width greater than the width of the tip of the hardness adjusting member in the removal direction.

13. The cushion body according to claim 12, wherein the shape of the widened portion is such that the width is smallest at the rear end in the removal direction of the hardness adjustment member, and it increases continuously toward the front end in the removal direction.

14. The groove comprises a first groove and a second groove that is deeper than the first groove. The cushion body according to claim 11, wherein the hardness adjusting member comprises a first adjusting member corresponding to the first groove and a second adjusting member corresponding to the second groove.

15. The cushion body according to claim 12 or 13, wherein a plurality of widening portions are provided in the direction of removal of the hardness adjustment member.

16. The direction in which the hardness adjustment member is removed from the groove is in the thickness direction of the main body member, The cross-sectional shape perpendicular to the extending direction of the groove and the cross-sectional shape perpendicular to the longitudinal direction of the hardness adjustment member have a widened portion with a width greater than the width of the tip of the hardness adjustment member in the removal direction. The cushion body according to claim 14, wherein the first groove and the first adjustment member have one widening portion, and the second groove and the second adjustment member have two widening portions in the direction of removal of the second adjustment member.

17. The cushion body according to claim 16, wherein a connecting portion is provided between the two widening portions of the second adjustment member, the connecting portion being less than or equal to the width of the tip portion of the hardness adjustment member in the removal direction and cuttable in the extending direction of the second adjustment member.

18. The cushion body according to claim 11 or 12, wherein the main body member further has a plurality of linear grooves on the surface and / or back surface where the groove is formed, in a direction intersecting the groove.

19. The cushion body according to claim 18, wherein the depth of the linear groove is shallower than the depth of the concave groove.

20. In the cushion body according to claim 19, A method for adjusting the hardness of a cushion body, characterized by cutting the hardness adjusting member at a notch provided by the linear groove, thereby removing a portion of the hardness adjusting member from the groove and partially adjusting the hardness of the cushion body.

21. In the cushion body according to claim 1 or 11, A method for adjusting the hardness of a cushion body, characterized by partially adjusting the hardness of the cushion body by making the groove visible by removing the hardness adjustment member from the groove from the standard configuration.

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