Cushion pad and mattress

Abstract

The present invention provides a cushion pad capable of suppressing the frequency of replacing an old cushion pad in use with another new cushion pad even when the body weight, muscle amount, or the like of a user changes, and the number of options of adjustable resilience characteristics is large. The cushion pad is formed by arranging an upper cushion pad and a lower cushion pad which are formed by filament three-dimensional combination bodies in an overlapping mode in the vertical direction, in the cushion pad, the upper cushion pad and the lower cushion pad can be mutually exchanged in position and can be respectively reversed in the vertical direction, and the position of the upper cushion pad and the position of the lower cushion pad can be mutually changed. At least three of a rebound characteristic of an upper surface of the upper cushion pad, a rebound characteristic of a lower surface of the upper cushion pad, a rebound characteristic of an upper surface of the lower cushion pad, and a rebound characteristic of a lower surface of the lower cushion pad are different from each other.

Description

Technical Field

[0001] The present invention relates to a cushion that can be used for various purposes and a mattress formed using the cushion. Background Art

[0002] As a cushioning raw material that can be used for a mattress or a pillow, etc., a three-dimensional filament bonded body (three-dimensional network structure) obtained by three-dimensionally fusion bonding filaments containing a thermoplastic resin or a thermoplastic elastomer has attracted attention.

[0003] Such a cushioning raw material has the advantages of being easily recyclable, not easily getting damp and being washable. Furthermore, by adjusting the diameter of the filaments or the supply amount of the filaments, the resilience characteristics (the degree of high resilience or low resilience) of the cushion can be easily adjusted, and thus it has the advantage of being able to easily manufacture a cushion that conforms to the user's body shape or preference.

[0004] As a method for manufacturing such a cushion, for example, Patent Document 1 discloses a method for manufacturing a cushion that gradually hardens from the surface side toward the back side by arranging nozzles with different pore diameters in the vertical direction (thickness direction). In addition, Patent Document 2 discloses a method for manufacturing a cushion that adjusts the hardness corresponding to each part of the body such as the shoulder or the hip by adjusting the pulling speed of the three-dimensional filament bonded body.

[0005] [Prior Art Documents]

[0006] [Patent Documents]

[0007] Patent Document 1: Japanese Patent Laid-Open No. 2006-97223

[0008] Patent Document 2: Japanese Patent Laid-Open No. 2010-154965 Summary of the Invention

[0009] [Problems to be Solved by the Invention]

[0010] Even for a cushion with the best resilience characteristics for a user at the start of using the cushion, sometimes during long-term use, the user's muscle mass or weight may change due to muscle training or the like. In such a case, the best resilience characteristics for the user change, and thus it is necessary to replace the cushion.

[0011] In the cushion pad of Patent Document 1, since the surface is soft and the back is hard, two usage methods can be obtained by using the surface and the back inverted. However, in the cushion pad, there is only one option for adjusting the rebound characteristics. Therefore, there is a problem that when the optimal rebound characteristics change due to changes in the user's body shape such as weight or muscle mass, unless the rebound characteristics can be adjusted to the appropriate ones by reversing the surface and the back, a new cushion pad must be purchased and the cushion pad in use must be replaced.

[0012] In view of the above problems, an object of the present invention is to provide a cushion pad and a mattress using the cushion pad, which have many options for adjusting the rebound characteristics even when, for example, the weight or muscle mass of the user changes, thereby reducing the frequency of replacing an old cushion pad in use with another new cushion pad.

[0013] [Technical means to solve the problem]

[0014] The cushion pad of the present invention is configured as follows: an upper cushion pad and a lower cushion pad composed of a three-dimensional combination of filaments are arranged in an overlapping manner in the up-down direction, in the cushion pad, the upper cushion pad and the lower cushion pad can be interchanged with each other and can be reversed in the up-down direction respectively, and at least three of the rebound characteristics of the upper surface of the upper cushion pad, the rebound characteristics of the lower surface of the upper cushion pad, the rebound characteristics of the upper surface of the lower cushion pad, and the rebound characteristics of the lower surface of the lower cushion pad are different from each other.

[0015] The mattress of the present invention is configured to support a user who sleeps in an upward position, and includes a plurality of cushion pads arranged in a row in the height direction of the user, at least one of the plurality of cushion pads being a specific cushion pad of the structure.

[0016] As the structure, more specifically, it can be set as follows: the plurality of cushion pads include a shoulder cushion pad for supporting the shoulder, a waist cushion pad for supporting the waist, and a leg cushion pad for supporting the leg as the specific cushion pad, and the upper cushion pad and the lower cushion pad in the shoulder cushion pad, the waist cushion pad, and the leg cushion pad are all the same in appearance. In addition, the "same appearance" in this application means that the overall observed appearance and its size are substantially the same without considering the tiny bumps on the surface of the three-dimensional filament combination or the gaps inside.

[0017] The cushion pad of the present invention is configured as follows: three or more specified number of cushion pads for constituting a filament three-dimensional combination body are configured in a manner that the upper surface and the lower surface have the same rebound characteristics and are arranged in an overlapping manner in the upper and lower directions. Among the cushion pads, the rebound characteristics of the specified number of cushion pads for constituting the filament three-dimensional combination body are different, and the appearances are all the same, and the positions of the cushion pads for constituting the filaments can be exchanged with the other cushion pads for constituting the filaments.

[0018] The mattress of the present invention is configured to support a user who sleeps in an upward position, and includes a plurality of cushion pads arranged in a row in the height direction of the user, at least one of the plurality of cushion pads being a cushion pad of the above configuration.

[0019] The mattress of the present invention is configured as follows: the mattress supports a user who takes an upward sleeping posture, and the mattress has a plurality of cushion pads arranged in a manner arranged in the height direction of the user, the plurality of cushion pads including a shoulder cushion pad for supporting the shoulders, a waist cushion pad for supporting the waist, and a leg cushion pad for supporting the legs, the shoulder cushion pad being formed by arranging three or more shoulder cushion pads of a predetermined number formed by a three-dimensional bonded body of filaments having different rebound characteristics in an overlapping manner in the vertical direction, the waist cushion pad being formed by arranging the predetermined number of waist cushion pads formed by a three-dimensional bonded body of filaments having different rebound characteristics in an overlapping manner in the vertical direction, and the leg cushion pad being formed by arranging the predetermined number of leg cushion pads formed by a three-dimensional bonded body of filaments having different rebound characteristics in an overlapping manner in the vertical direction, and the outer shapes of the shoulder cushion pad, the waist cushion pad, and the leg cushion pad are all the same.

[0020] [Effects of the Invention]

[0021] According to the cushion pad of the present invention, even when the weight or muscle mass of the user changes, there are many options for adjusting the rebound characteristics, so that the frequency of replacing an old cushion pad in use with another new cushion pad can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] [ Figure 1 ] is a conceptual diagram of the mattress 100 according to the first embodiment.

[0023] [ Figure 2A ] is an enlarged view of the shoulder upper cushion pad of the first embodiment.

[0024] [ Figure 2B ] is an enlarged view of the lower shoulder cushion of the first embodiment.

[0025] [ Figure 3 ] is an explanatory diagram of the configuration pattern of the shoulder cushion pad according to the first embodiment.

[0026] [ Figure 4 ] is an explanatory diagram of the configuration pattern of the shoulder cushion pad according to the first embodiment.

[0027] [ Figure 5 ] is an explanatory diagram of the effect on the rebound characteristics of the upper surface of a cushion formed by overlapping three-dimensional filaments with different volume densities.

[0028] [ Figure 6 ] is a conceptual diagram of a mattress 200 according to a second embodiment.

[0029] [ Figure 7 ] is a conceptual diagram of a pillow 300 according to a third embodiment.

[0030] [ Figure 8 ] is a conceptual diagram of a pillow 400 according to a fourth embodiment.

[0031] [ Fig. 9 ] is a conceptual diagram of a device for manufacturing a three-dimensional combination of filaments.

[0032] [ Fig.10 ]yes Fig. 9 Arrow view of section A-A' shown.

[0033] [ Fig.11 ] is an explanatory diagram showing an example of the appearance of the nozzle portion when viewed from below.

[0034] [ Fig.12 ] is an explanatory diagram showing another example of the appearance of the nozzle portion when viewed from below.

[0035] [ Fig.13 ] is an explanatory diagram showing another example of the appearance of the nozzle portion when viewed from below. DETAILED DESCRIPTION

[0036] The following describes various embodiments of the present invention. In addition, the up-down and front-back directions (orthogonal directions) related to the mattress or cushion in the following description are as follows: Figure 1 The directions are defined for convenience only, with the thickness direction of the mattress or cushion being the up-down direction. Figures 1 to 8 The cushion pad, mattress, and pillow shown are cross-sectional views when cut along a plane perpendicular to the left-right direction (a direction perpendicular to both the up-down direction and the front-rear direction).

[0037] 1. First Implementation

[0038] First, a first embodiment of the present invention will be described. Figure 1 1 is a conceptual diagram of a mattress 100 according to a first embodiment. The mattress 100 is a mattress that supports a user who sleeps in an upward position. Assuming that the mattress 100 is used in a manner such that the front-to-back direction is aligned with the height direction of the user, the mattress 100 has a rectangular shape with the front-to-back direction being the long side direction when viewed from above.

[0039] To explain more specifically, in the mattress 100, in the front-back direction (the height direction of the user), the shoulder cushion pad 101 for supporting the shoulder, the waist cushion pad 102 for supporting the waist, and the leg cushion pad 103 for supporting the leg are arranged in sequence. In addition, if the set of the cushion pads 101 to 103 is regarded as an integrated cushion body, it can be said that the cushion body can be divided into a plurality of cushion pads 101 to 103 in the height direction of the user. The mattress 100 is formed by accommodating the cushion pads 101 to 103 in a mattress cover 104. The cushion pads 101 to 103 can be freely accommodated in the mattress cover 104.

[0040] The shoulder cushion pad 101 is formed by configuring the shoulder cushion pad 101A and the shoulder cushion pad 101B respectively in an overlapping manner in the vertical direction, which are formed by the three-dimensional combination of filaments. The waist cushion pad 102 is formed by configuring the waist cushion pad 102A and the waist cushion pad 102B respectively in an overlapping manner in the vertical direction, which are formed by the three-dimensional combination of filaments. The leg cushion pad 103 is formed by configuring the leg cushion pad 103A and the leg cushion pad 103B respectively in an overlapping manner in the vertical direction, which are formed by the three-dimensional combination of filaments. In addition, the shoulder cushion pad 101, the waist cushion pad 102, and the leg cushion pad 103 can also be regarded as being able to be divided into an upper cushion pad and a lower cushion pad along the vertical direction.

[0041] In this way, the mattress 100 is constructed using an upper shoulder cushion pad 101A, a lower shoulder cushion pad 101B, an upper waist cushion pad 102A, a lower waist cushion pad 102B, an upper leg cushion pad 103A, and a lower leg cushion pad 103B (in the following description, for convenience, each of these six cushion pads is sometimes referred to as a "structural cushion pad Z1"). The outer shapes of the structural cushion pads Z1 are all the same. To be more specific, all the structural cushion pads Z1 are in the shape of a rectangular parallelepiped (a plate-like body with a constant thickness and a rectangular shape when viewed from above), and the upper and lower dimensions (thickness), front and rear dimensions (the distance between the opposite sides of the rectangular shape), and left and right dimensions (the distance between the other opposite sides of the rectangular shape) of the rectangular parallelepiped are the same in all the structural cushion pads Z1. Figure 1As shown, each component cushion Z1 is housed in the mattress cover 104 and positioned. Each component cushion Z1 can be appropriately taken out from the mattress cover 104 and swapped with any other component cushion Z1, and can also be set at any position within the mattress cover 204. In addition, since the outer shapes of the component cushions Z1 are the same, even if they are swapped with each other, the shape of the mattress 100 remains the original state.

[0042] Figure 2A is Figure 1 an enlarged view of the upper shoulder cushion 101A shown in Figure 2B is Figure 1 an enlarged view of the lower shoulder cushion 101B shown in

[0043] The upper shoulder cushion 101A has a structure in which a second resilient layer H2 is disposed above the first resilient layer H1, and the lower shoulder cushion 101B has a structure in which a third resilient layer H3 is disposed above the fourth resilient layer H4. The volume densities of the resilient layers H1 to H4 are all different. In the present embodiment, the volume density of the first resilient layer H1 is the lowest, and the volume density increases in the order of the second resilient layer H2, the third resilient layer H3, and the fourth resilient layer H4.

[0044] Accordingly, the resilience characteristic Fa of the lower surface of the upper shoulder cushion 101A is the lowest, and the resilience characteristics increase in the order of the resilience characteristic Fb of the upper surface of the upper shoulder cushion 101A, the resilience characteristic Fc of the upper surface of the lower shoulder cushion 101B, and the resilience characteristic Fd of the lower surface of the lower shoulder cushion 101B. In the example of the present embodiment, the resilience characteristic Fa is 80 N, the resilience characteristic Fb is 100 N, the resilience characteristic Fc is 130 N, and the resilience characteristic Fd is 150 N.

[0045] Here, the "resilience characteristic" in the present application is one of the characteristics of the cushion, and is a concept that is an index of the magnitude of the resilience force generated when the cushion is compressed by a specified amount. It can be said that the higher the resilience characteristic of the upper surface of the cushion, the higher the resilience of the cushion on the upper surface, and the higher the resilience characteristic of the lower surface of the cushion, the higher the resilience of the cushion on the lower surface. There is a tendency that the higher the volume density of the cushion formed by the three-dimensional combination of filaments, the higher the resilience characteristic. In the present embodiment, the value of the resilience characteristic of any surface (conveniently referred to as the "target surface") of the upper surface and the lower surface of the cushion is measured by the following measurement method.

[0046] In the measurement method, first, a measurement cushion pad (a sample of a cushion pad to be measured) is placed on a horizontal platform with the object surface facing upward, and the thickness of the measurement cushion pad when not compressed is measured, which is set as L1 (mm). Next, a rod-shaped pressing member (loading member) having a circular plate with a diameter of 150 mm horizontally arranged at the front end of the lower side is brought into vertical contact with the central part of the object surface of the measurement cushion pad, and then the loading member is moved downward to gradually compress the measurement cushion pad in the thickness direction.

[0047] While the load member is moved in this way, the distance L2 (mm) between the bottom surface of the measuring cushion pad (the upper surface of the horizontal platform) and the lower front end of the load member (circular plate) is measured as the thickness of the measuring cushion pad when it is compressed. In addition, the load borne by the measuring cushion pad when the distance L2 is 7.5 mm shorter than the thickness L1 (mm) of the measuring cushion pad when it is not compressed (L2 = L1-7.5) is measured as a value including the weight of the load member, and the value (N) is taken as the value of the rebound characteristic of the target surface of the measuring cushion pad. Based on the above, it can be said that the higher the rebound characteristic of the target surface of the cushion pad, the higher the rebound force generated on the target surface even if the compression amount is the same, and the higher the rebound of the cushion pad on the target surface.

[0048] The rebound characteristics of the upper surface of the shoulder cushion 101 can be adjusted by changing the arrangement pattern of the components of the shoulder cushion 101 (the upper shoulder cushion 101A and the lower shoulder cushion 101B). Figure 3 and Figure 4 The arrangement pattern of the components of the shoulder cushion 101 will be described in detail.

[0049] Figure 3 The figure shows the changes in the arrangement pattern of the components of the shoulder cushion pad 101 including the upper shoulder cushion pad 101A and the lower shoulder cushion pad 101B. The upper shoulder cushion pad 101A and the lower shoulder cushion pad 101B are at least one of swapped and flipped (reversed in the up-down direction) to obtain a maximum of 8 changes in the arrangement pattern of the components of the shoulder cushion pad 101. In any of the arrangement patterns in the changes, the arrangement order of the first to fourth resilient layers H1 to H4 in the up-down direction is different.

[0050] In addition, as in the present embodiment, when the volume densities of the first to fourth resilient layers H1 to H4 are all different, the resilient properties of the upper surface of the shoulder cushion 101 are basically different in each of the above-mentioned changes. Figure 3In each of the configuration modes shown, the rebound characteristics of the upper surface of the shoulder cushion pad 101 are the lowest in the configuration mode (1), and become higher in the order of (1) to (8). In this way, the rebound characteristics of the upper surface of the shoulder cushion pad 101 can be adjusted to a maximum of 8 types by at least one of swapping and flipping the positions of the upper shoulder cushion pad 101A and the lower shoulder cushion pad 101B. In addition, the reason why the rebound characteristics of the upper surface of the shoulder cushion pad 101 are changed by changing the configuration order of the first to fourth rebound layers H1 to H4 in the vertical direction will be described later. Figure 5 Provide explanation.

[0051] In addition, the components of the shoulder cushion pad 101 are not limited to the shoulder upper cushion pad 101A and the shoulder lower cushion pad 101B. When other cushion pads (the waist lower cushion pad 102B, the leg upper cushion pad 103A, all or part of the waist upper cushion pad 102A, and the leg lower cushion pad 103B) can be used as the above-mentioned components, the changes in the arrangement pattern of the components of the shoulder cushion pad 101 are further increased.

[0052] For example, when the upper leg cushion pad 103A and the lower leg cushion pad 103B can be used as components of the shoulder cushion pad 101, the configuration pattern of the components of the shoulder cushion pad 101 may be different from that of the upper leg cushion pad 103A and the lower leg cushion pad 103B. Figure 3 In addition to the changes shown, it is also possible to use Figure 4 In addition, Figure 4 The variations shown in (1) to (4) are examples of structures in which the shoulder cushion pad 101A and the leg cushion pad 103A are used for the shoulder cushion pad 101. Figure 4 The variations shown in (5) to (8) are examples of structures in which the shoulder cushion pad 101B and the leg cushion pad 103B are used for the shoulder cushion pad 101. Figure 4 In each of the arrangement patterns shown, the rebound characteristics of the upper surface of the shoulder cushion 101 are lowest in the arrangement pattern (1), and become higher in the order of (1) to (8).

[0053] In this way, the rebound characteristics of the upper surface of the shoulder cushion 101 can be adjusted to more modes by using all or part of the waist lower cushion 102B, the leg upper cushion 103A, the waist upper cushion 102A, and the leg lower cushion 103B.

[0054] In the present embodiment, the waist lower cushion pad 102B and the leg upper cushion pad 103A have the same structure as the shoulder upper cushion pad 101A, and the waist upper cushion pad 102A and the leg lower cushion pad 103B have the same structure as the shoulder lower cushion pad 101B, so the description of these structures is omitted.

[0055] In addition, the rebound characteristics of the upper surface of the waist cushion pad 102 can be adjusted by changing the arrangement pattern of the components of the waist cushion pad 102, and the rebound characteristics of the upper surface of the leg cushion pad 103 can be adjusted by changing the arrangement pattern of the components of the leg cushion pad 103. The adjustment of these rebound characteristics can be implemented in the same way as the adjustment of the rebound characteristics of the upper surface of the shoulder cushion pad 101, so the detailed description is omitted here.

[0056] Figure 5 The figure schematically shows the effect of a load W on the upper surface of a cushion pad G with four layers of resilient layers L1 to L4 (all of which are layers composed of three-dimensional filaments) stacked one above the other, on the resilient properties of the upper surface. In addition, the distances d1 to d4 shown in the figure represent the distances from the upper surface of the cushion pad G. Figure 5 In the example shown, the distance d1 from the upper surface of the cushion G downward is the resilience layer L1, the distance d2 from the lower portion of the resilience layer L1 downward is the resilience layer L2, the distance d3 from the lower portion of the resilience layer L2 downward is the resilience layer L3, and the distance d4 from the lower portion of the resilience layer L3 is the resilience layer L4.

[0057] In a cushion formed of a general elastic body such as a metal coil, even if the vertical orientation of the elastic body is changed, or if the vertical arrangement order of the layers is changed when the elastic body includes a plurality of layers, the rebound characteristic (load required to compress a specified amount) of the upper surface of the cushion is constant. On the other hand, the rebound characteristic of the upper surface of the cushion G formed of the rebound layers L1 to L4 is greatly affected not only by the vertical force (vertical compression force T1) generated by the cushion G when the load W is applied, but also by the horizontal force (horizontal tension T2), and changes under the influence of both the vertical compression force T1 and the horizontal tension T2.

[0058] As a result, with respect to the influence on the rebound characteristics of the upper surface of the cushion G obtained as a reaction to the load W, the influence brought by the volume density of the rebound layer L1 is the greatest, and the influence becomes smaller in the order of the influence brought by the volume density of the rebound layer L1, the influence brought by the volume density of the rebound layer L2, the influence brought by the volume density of the rebound layer L3, and the influence brought by the volume density of the rebound layer L4.

[0059] Thus, in the case of a cushion pad in which a plurality of resilient layers (three-dimensional filament combinations) having different volume densities are arranged in the vertical direction, the resilient properties of the upper surface of the cushion pad change depending on where each resilient layer is arranged in the vertical direction. Therefore, for the shoulder cushion pad 101, the resilient properties of the upper surface of the shoulder cushion pad 101 change by changing the vertical arrangement order of the first to fourth resilient layers H1 to H4 constituting the shoulder cushion pad 101.

[0060] The cushion pad of the present invention utilizes the characteristics of the three-dimensional combination of filaments to successfully improve the degree of freedom of adjustment of the rebound characteristics, and achieves a special effect that the cushion pad formed by a general elastic body such as a metal coil does not have. In addition, the influence of the horizontal tension T2 becomes obvious in the high-rebound three-dimensional combination of filaments with a rebound characteristic exceeding 80N. In particular, when the rebound characteristic exceeds 120N, the horizontal tension T2 has a very large effect on the local compression generated when the knee or elbow is placed on the cushion pad, so the rebound characteristic will not be excessively improved, and the sinking or bottoming feeling can be effectively reduced.

[0061] 2. Second Implementation

[0062] Next, a second embodiment of the present invention will be described. In the following description, the focus is on the description of matters that are different from the first embodiment, and the description of matters that are common to the first embodiment may be omitted.

[0063] Figure 6 2 is a conceptual diagram of a mattress 200 according to a second embodiment. The mattress 200 is a mattress that supports a user who takes an upward sleeping position. Assuming that the mattress 200 is used in a manner such that the front-to-back direction is aligned with the height direction of the user, the mattress 200 has a rectangular shape with the front-to-back direction being the long side direction when viewed from above.

[0064] To explain more specifically, in the mattress 200, in the front-back direction (the height direction of the user), the shoulder cushion pad 201 for supporting the shoulder, the waist cushion pad 202 for supporting the waist, and the leg cushion pad 203 for supporting the leg are arranged in sequence. In addition, if the set of the cushion pads 201 to 203 is regarded as an integrated cushion body, it can be said that the cushion body can be divided into a plurality of cushion pads 201 to 203 in the height direction of the user. The mattress 200 is formed by accommodating the cushion pads 201 to 203 in the mattress cover 204. The cushion pads 201 to 203 can be freely accommodated in the mattress cover 204.

[0065] The shoulder cushion 201 is formed by arranging and overlapping each of the shoulder first cushion 201A, the shoulder second cushion 201B, the shoulder third cushion 201C, and the shoulder fourth cushion 201D, which are respectively formed by a three-dimensional combination of filaments, in an up-down direction. The waist cushion 202 is formed by arranging and overlapping each of the waist first cushion 202A, the waist second cushion 202B, the waist third cushion 202C, and the waist fourth cushion 202D, which are respectively formed by a three-dimensional combination of filaments, in an up-down direction.

[0066] The leg cushion pad 203 is formed by arranging the first leg cushion pad 203A, the second leg cushion pad 203B, the third leg cushion pad 203C, and the fourth leg cushion pad 203D, which are respectively formed by a three-dimensional combination of filaments, in an overlapping manner in the vertical direction. In addition, the shoulder cushion pad 201, the waist cushion pad 202, and the leg cushion pad 203 can also be regarded as being able to be divided into each of the first cushion pad to the fourth cushion pad in the vertical direction.

[0067] Thus, the mattress 200 is constructed using four cushion pads 201A to 201D constituting shoulder cushions, four cushion pads 202A to 202D constituting waist cushions, and four cushion pads 203A to 203D constituting leg cushions (for convenience in the following description, each of these twelve cushion pads is sometimes referred to as a "structural cushion pad Z2").

[0068] The outer shapes of the structural cushions Z2 are all the same. To be more specific, all structural cushions Z2 are in the shape of a cuboid (a plate-like body with a constant thickness and a rectangular shape when viewed from above), and the upper and lower dimensions (thickness), front and rear dimensions (the distance between the opposite sides of the rectangular shape), and left and right dimensions (the distance between the other opposite sides of the rectangular shape) of the cuboid are the same for all structural cushions Z2. Figure 6 As shown, each structural cushion pad Z2 is accommodated and positioned in the mattress cover 204. Each structural cushion pad Z2 can be taken out from the mattress cover 204 as needed and exchanged with any other structural cushion pad Z2, and can also be set at any position in the mattress cover 204. In addition, since the outer shapes of each structural cushion pad Z2 are the same, even if the positions are exchanged, the shape of the mattress 200 remains the same.

[0069] The first shoulder cushion 201A, the fourth waist cushion 202D, and the third leg cushion 203C are formed entirely of the first resilient layer H1, and the resilient property of the upper surface is the same as that of the lower surface. The second shoulder cushion 201B, the third waist cushion 202C, and the first leg cushion 203A are formed entirely of the second resilient layer H2, and the resilient property of the upper surface is the same as that of the lower surface.

[0070] The fourth shoulder cushion 201D, the first waist cushion 202A, and the fourth leg cushion 203D are formed entirely of the third resilient layer H3, and the resilient property of the upper surface is the same as that of the lower surface. The third shoulder cushion 201C, the second waist cushion 202B, and the second leg cushion 203B are formed entirely of the fourth resilient layer H4, and the resilient property of the upper surface is the same as that of the lower surface.

[0071] In the present embodiment, the volume density of each rebound layer H1 to H4 is different. In the present embodiment, the volume density of the first rebound layer H1 is the lowest, and the volume density increases in the order of the second rebound layer H2, the third rebound layer H3, and the fourth rebound layer H4. As a result, the rebound characteristic Fa of the upper surface and the lower surface of each cushion formed by the first rebound layer H1 is the lowest, and the rebound characteristic increases in the order of the rebound characteristic Fb of the upper surface and the lower surface of each cushion formed by the second rebound layer H2, the rebound characteristic Fc of the upper surface and the lower surface of each cushion formed by the third rebound layer H3, and the rebound characteristic Fd of the upper surface and the lower surface of each cushion formed by the fourth rebound layer H4. In the example of the present embodiment, the rebound characteristic Fa is 80N, the rebound characteristic Fb is 100N, the rebound characteristic Fc is 130N, and the rebound characteristic Fd is 150N.

[0072] According to the present embodiment, there are 24 configuration patterns of the configuration cushion pads Z2 (i.e., the first cushion pad 201A to the fourth cushion pad 201D of the shoulder) in the shoulder cushion pad 201. As a result, a maximum of 24 options are available for the rebound characteristics of the upper surface of the shoulder cushion pad 201, and the degree of freedom in adjusting the rebound characteristics becomes very high. In addition, similarly, for each of the waist cushion pad 202 and the leg cushion pad 203, a maximum of 24 options are available for the rebound characteristics of the upper surface, and the degree of freedom in adjusting the rebound characteristics becomes very high. In addition, by freely changing all the configurations of the twelve configuration cushion pads Z2, the degree of freedom in adjusting the rebound characteristics becomes further high.

[0073] In addition, in the second embodiment, the shoulder cushion pad 201, the waist cushion pad 202, and the leg cushion pad 203 are respectively formed of four structural cushion pads Z2. As a modified example, the shoulder cushion pad 201, the waist cushion pad 202, and the leg cushion pad 203 may be respectively formed of three or more structural cushion pads Z2. As an example, when the shoulder cushion pad 201, the waist cushion pad 202, and the leg cushion pad 203 are respectively formed of three structural cushion pads Z3, in each of the shoulder cushion pad 201, the waist cushion pad 202, and the leg cushion pad 203, there are 6 types of arrangement patterns of each structural cushion pad Z2, and a maximum of 6 options can be obtained for the rebound characteristics of the upper surface.

[0074] 3. Third Implementation

[0075] Next, a third embodiment of the present invention will be described. In the following description, the focus is on the description of matters that are different from the first embodiment, and the description of matters that are common to the first embodiment may be omitted.

[0076] Figure 7: is a conceptual diagram of a pillow 300 of the third embodiment. The pillow 300 can be used in a form of supporting the head of a user who takes an upward sleeping posture. The pillow 300 is formed by accommodating a pillow cushion 301 in a pillow cover 302. The pillow cushion 301 is formed by arranging an upper pillow cushion 301A and a lower pillow cushion 301B (in the following description, for convenience, these two cushions are sometimes referred to as "structural cushions Z3") respectively, which are composed of a three-dimensional combination of filaments, in an overlapping manner in the vertical direction. In addition, it can also be considered that the pillow cushion 301 can be divided into each structural cushion Z3 in the vertical direction. Each structural cushion Z3 can be freely accommodated in the pillow cover 302.

[0077] The appearance of each structural cushion Z3 is the same. To be more specific, all structural cushions Z3 are in the shape of a cuboid (a plate-like body with a constant thickness and a rectangular shape when viewed from above), and the upper and lower dimensions (thickness), front and rear dimensions (the distance between the opposite sides of the rectangular shape), and left and right dimensions (the distance between the other opposite sides of the rectangular shape) of the cuboid are the same in all structural cushions Z3. Figure 7 As shown, each structural cushion pad Z3 is accommodated and positioned in the pillow cover 302. Each structural cushion pad Z3 can be taken out from the pillow cover 302 as appropriate and can be replaced with each other, and can also be set at any position in the pillow cover 302. In addition, since each structural cushion pad Z3 has the same outer shape, the shape of the pillow 300 remains the same even if the positions are replaced with each other.

[0078] The cushion pad 301A on the pillow is configured such that the second resilient layer S2 is arranged on the upper side of the first resilient layer S1, and the cushion pad 301B under the pillow is configured such that the third resilient layer S3 is arranged on the upper side of the fourth resilient layer S4. The volume densities of the resilient layers S1 to S4 are all different. In the present embodiment, the volume density of the first resilient layer S1 is the lowest, and the volume density increases in the order of the second resilient layer S2, the third resilient layer S3, and the fourth resilient layer S4. As a result, the rebound characteristic Fp of the lower surface of the cushion pad 301A on the pillow is the lowest, and the rebound characteristic increases in the order of the rebound characteristic Fq of the upper surface of the cushion pad 301A on the pillow, the rebound characteristic Fr of the upper surface of the cushion pad 301B under the pillow, and the rebound characteristic Fs of the lower surface of the cushion pad 301B under the pillow. In the example of the present embodiment, the spring-back characteristic Fp is 10N, the spring-back characteristic Fq is 20N, the spring-back characteristic Fr is 30N, and the spring-back characteristic Fs is 40N.

[0079] The rebound characteristics of the upper surface of the pillow cushion 301 can be adjusted by changing the arrangement pattern of the pillow cushion 301, similarly to the shoulder cushion 101 in the first embodiment. That is, by performing at least one of the position exchange and flipping of the upper pillow cushion 301A and the lower pillow cushion 301B, a maximum of eight variations of the arrangement pattern of the pillow cushion 301 can be obtained. In any of the variations, the arrangement order of the first to fourth rebound layers S1 to S4 in the vertical direction is different.

[0080] In addition, when the first to fourth resilient layers S1 to S4 all have different resilient properties as in the present embodiment, the resilient properties of the upper surface of the pillow cushion pad 301 are basically different in each of the above-mentioned changes. In this way, the resilient properties of the upper surface of the pillow cushion pad 301 can be adjusted to a maximum of 8 types by performing at least one of the position exchange and flipping of the upper pillow cushion pad 301A and the lower pillow cushion pad 301B.

[0081] 4. Fourth Implementation

[0082] Next, a fourth embodiment of the present invention will be described. In the following description, the focus will be on the description of matters that are different from the third embodiment, and the description of matters that are common to the third embodiment may be omitted.

[0083] Figure 8 4 is a conceptual diagram of a pillow 400 according to a fourth embodiment. The pillow 400 can be used in a form of supporting the head of a user who takes an upward sleeping position. The pillow 400 is formed by accommodating a pillow cushion 401 in a pillow cover 402. The pillow cushion 401 is formed by arranging a first cushion 401A, a second cushion 401B, a third cushion 401C, and a fourth cushion 401D (in the following description, for convenience, these four cushions are referred to as "structural cushions Z4") respectively in an overlapping manner in the vertical direction. In addition, the pillow cushion 401 can also be regarded as being divisible into each structural cushion Z4 in the vertical direction. Each structural cushion Z4 can be freely accommodated in the pillow cover 402 in a loading and unloading manner.

[0084] The outer shapes of the structural cushions Z4 are all the same. To be more specific, all structural cushions Z4 are in the shape of a cuboid (a plate-like body with a constant thickness and a rectangular shape when viewed from above), and the upper and lower dimensions (thickness), front and rear dimensions (the distance between the opposite sides of the rectangular shape), and left and right dimensions (the distance between the other opposite sides of the rectangular shape) of the cuboid are the same in all structural cushions Z4. Figure 8As shown, each structural cushion Z4 is accommodated and positioned in the pillow cover 402. Each structural cushion Z4 can be taken out from the pillow cover 402 as appropriate and exchanged with any other structural cushion Z4, and can also be set at any position in the pillow cover 402. In addition, since the outer shapes of the structural cushions Z4 are the same, the shape of the pillow 400 remains the same even if the positions are exchanged.

[0085] The first cushion pad 401 of the pillow is formed as a whole by the first resilient layer S1, and the resilient property of the upper surface is the same as the resilient property of the lower surface. The second cushion pad 402 of the pillow is formed as a whole by the fourth resilient layer S4, and the resilient property of the upper surface is the same as the resilient property of the lower surface. The third cushion pad 403 of the pillow is formed as a whole by the third resilient layer S3, and the resilient property of the upper surface is the same as the resilient property of the lower surface. The fourth cushion pad 404 of the pillow is formed as a whole by the second resilient layer S2, and the resilient property of the upper surface is the same as the resilient property of the lower surface.

[0086] In the present embodiment, the volume density of each resilient layer S1 to S4 is different. In the present embodiment, the volume density of the first resilient layer S1 is the lowest, and the volume density increases in the order of the second resilient layer S2, the third resilient layer S3, and the fourth resilient layer S4. Thus, the rebound characteristics Fp of the upper and lower surfaces of the first cushion 401 of the pillow formed by the first resilient layer S1 are the lowest, and the rebound characteristics increase in the order of the rebound characteristics Fq of the upper and lower surfaces of the fourth cushion 404 of the pillow formed by the second resilient layer S2, the rebound characteristics Fr of the upper and lower surfaces of the third cushion 403 of the pillow formed by the third resilient layer S3, and the rebound characteristics Fs of the upper and lower surfaces of the second cushion 402 of the pillow formed by the fourth resilient layer S4. In the example of the present embodiment, the rebound characteristics Fp is 10N, the rebound characteristics Fq is 20N, the rebound characteristics Fr is 30N, and the rebound characteristics Fs is 40N.

[0087] The rebound characteristics of the upper surface of the pillow cushion 401 can be adjusted by changing the arrangement pattern of each component cushion Z4, similar to the shoulder cushion 201 in the second embodiment. That is, by replacing the positions of the component cushions 401A to 401D, a maximum of 24 variations of the arrangement pattern of the pillow cushion 401 can be obtained. In any of the arrangement patterns in the variations, the arrangement order of the first to fourth rebound layers S1 to S4 in the vertical direction is different.

[0088] In addition, when the first to fourth resilient layers S1 to S4 all have different resilient properties as in the present embodiment, the resilient properties of the upper surface of the pillow cushion pad 401 are basically different in each of the above-mentioned changes. In this way, the resilient properties of the upper surface of the pillow cushion pad 401 can be adjusted to a maximum of 24 types by interchanging the positions of the constituent cushion pads 401A to 401D.

[0089] 5. Apparatus for manufacturing three-dimensional filament composites

[0090] Next, an example of an apparatus for manufacturing a three-dimensionally bonded body of filaments that can manufacture the structural cushion mats Z1 to Z4 in the above-described respective embodiments will be described.

[0091] Fig. 9 This is a conceptual diagram of a manufacturing apparatus 1 for a three-dimensional filament combination. Fig.10 yes Fig. 9 The arrow view of the A-A' section shown in the figure. In addition, the up and down, left and right, and front and back directions (directions orthogonal to each other) related to the manufacturing device 1 are as shown in the figures. The above directions are defined for convenience only, the vertical direction becomes the up and down direction, and the direction in which the pair of endless conveyors 26 and 27 described later face each other becomes the front and back direction.

[0092] The manufacturing device 1 of the three-dimensional combination of filaments includes: a molten filament supply part 10, which discharges a molten filament group MF including a plurality of molten filaments with a diameter of 0.5mm to 3mm in a vertically downward direction; and a fusion bonding forming part 20, which entangles the molten filament group MF three-dimensionally, fusion bonds the contact points, and then cools and solidifies to form a three-dimensional combination of filaments.

[0093] The molten filament supply unit 10 includes a pressurized melting unit 11 (extruder) and a filament discharge unit 12 (die). The pressurized melting unit 11 includes a material input unit 13 (hopper), a screw 14, a screw motor 15 for driving the screw 14, a screw heater 16, and a plurality of temperature sensors (not shown), and has a barrel 11a formed therein for conveying the thermoplastic resin supplied from the material input unit 13 while being heated and melted by the screw heater 16.

[0094] The screw 14 is rotatably accommodated in the barrel 11a. A barrel discharge port 11b for discharging the thermoplastic resin toward the filament discharge unit 12 is formed at the downstream end of the barrel 11a. The heating temperature of the screw heater 16 is controlled based on a detection signal of a temperature sensor provided in the molten filament supply unit 10, for example.

[0095] The filament discharging section 12 includes a nozzle section 17, a die heater 18, and a plurality of temperature sensors (not shown), and a diversion path 12a is formed inside. The diversion path 12a guides the molten thermoplastic resin discharged from the barrel discharge port 11b to the nozzle section 17.

[0096] The nozzle section 17 is a thick metal plate in the shape of a substantially rectangular parallelepiped with a plurality of openings formed therein, and is provided at the lower part of the filament discharging section 12 corresponding to the most downstream part of the diversion path 12a. A plurality of nozzle holes for discharging a molten filament group are formed in the nozzle section 17.

[0097] The die heater 18 is provided with a plurality (six in the Fig.10 example shown) in the left-right direction and heats the filament discharging section 12. The heating temperature of the die heater 18 is controlled based on, for example, the detection signal of the temperature sensor provided in the filament discharging section 12.

[0098] As the thermoplastic resin that can be used as the material of the three-dimensional filament assembly, for example, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polyamide resins such as nylon 66, polyolefin elastomers, polyester elastomers, polyurethane elastomers, polyamide elastomers, amorphous polystyrene elastomers, crystalline polystyrene elastomers, etc. can be used.

[0099] The thermoplastic resin supplied from the material input section 13 is heated and melted in the barrel 11a, and is extruded by, for example, a screw 14, and is supplied as the molten thermoplastic resin from the barrel discharge port 11b to the diversion path 12a of the filament discharging section 12. Then, a molten filament group MF including a plurality of molten filaments is discharged in a manner of advancing downward from each of the plurality of nozzles of the nozzle section 17.

[0100] The fusion bonding forming section 20 includes: a cooling water tank 21, a pair of endless belts 26, 27, a plurality of conveying rollers 28 to 35, a pair of chutes 22, 23, a cooling water supply section 24 and a cooling water supply section 25 that supply cooling water to the upper parts of the chute 22 and the chute 23 respectively.

[0101] The cooling water tank 21 is a water tank for pre-storing cooling water W. A pair of endless belts 26, 27 and a plurality of conveying rollers 28 to 35 are disposed inside the cooling water tank 21. The pair of endless belts 26, 27 and the plurality of conveying rollers 28 to 35 are driven by a drive motor (not shown).

[0102] A pair of slideways 22 and 23 receive the molten filaments at the ends in the thickness direction (the left and right ends in the front-back direction) of the molten filament group MF and bring them close to the direction of thinning the thickness of the molten filament group MF. In this embodiment, the slideways 22 and 23 are in the shape of curved flat plates, but they can also be in the shape of curved surfaces, or in the shape of an integrated unit in a manner of forming a quadrilateral or elliptical space.

[0103] In the fusion bonding forming section 20, the molten filament group MF is adjusted in thickness (forward and backward dimensions) by a pair of slideways 22 and 23, and is bent by the buoyancy of the cooling water W in the cooling water tank 21, so that each molten filament forms a random ring. The random ring is entangled with the adjacent random ring in a three-dimensional molten state, and the contact points are fusion bonded to form a three-dimensional filament combination 3DF (a three-dimensional filament combination). The three-dimensional filament combination 3DF is further cooled and solidified by the cooling water W while maintaining its thickness during the period of being transported between the endless conveyor belts 26 and 27.

[0104] Furthermore, the three-dimensional filament combination 3DF is conveyed by a plurality of conveying rollers 28 to 35 while being cooled by the cooling water W in the cooling water tank 21, and is sent out of the cooling water tank 21. The three-dimensional filament combination 3DF sent out of the cooling water tank 21 is cut into appropriate sizes and can be used as the structural cushion Z1 to the structural cushion Z4 of each embodiment.

[0105] Here, the volume density of the three-dimensional filament combination body 3DF of the rebound characteristics of the left and right cushions can be adjusted by changing the shape of the multiple nozzle holes in the nozzle part 17. For example, by increasing the inner diameter of the nozzle hole (nozzle diameter) or reducing the interval between adjacent nozzle holes (nozzle interval), the volume density of the three-dimensional filament combination body 3DF manufactured becomes higher accordingly, so that a cushion with high rebound characteristics can be obtained.

[0106] Furthermore, in order to obtain a structural cushion having a substantially uniform overall volume density, such as the structural cushion Z2 of the second embodiment or the structural cushion Z4 of the fourth embodiment, it is sufficient to make the nozzle diameter or the nozzle interval in the nozzle portion 17 substantially uniform. On the other hand, in order to obtain a structural cushion having different volume densities between the upper portion and the lower portion, such as the structural cushion Z1 of the first embodiment or the structural cushion Z3 of the third embodiment, it is sufficient to change the nozzle diameter or the nozzle interval in the nozzle portion 17 for each portion.

[0107] Fig.11 FIG. 1 shows an example of a schematic appearance of the nozzle portion 17 when viewed from below. Fig.11 In the nozzle section 17 shown, any nozzle hole is circular when viewed from below, and the nozzle diameter and nozzle spacing are constant. Fig.11 The manufacturing apparatus 1 of the nozzle portion 17 exemplified is suitable for manufacturing a structural cushion having a substantially uniform overall bulk density.

[0108] Fig.12 Another example of the appearance of the nozzle portion 17 as viewed from below is shown. Fig.12 In the nozzle portion 17 shown, the nozzle diameter is constant, but the portion near the front side ( Fig.12 The nozzle hole 17a provided in the inner side of the dotted frame α shown in the figure is connected to the nozzle hole 17a provided in the part near the rear side ( Fig.12 The nozzle holes 17a provided in the dotted line frame β shown in FIG. 1 have different nozzle spacings. The smaller the nozzle spacing, the more the discharge amount of the molten filaments per unit area in the portion, and the higher the volume density of the three-dimensional filament combination 3DF corresponding to the portion.

[0109] Therefore, according to the Fig.12 The manufacturing device 1 of the nozzle portion 17 shown in the example is suitable for manufacturing a cushion pad having different volume densities in the upper and lower portions. That is, of the upper and lower portions of the cushion pad, the portion with higher volume density is formed by molten filaments discharged from the nozzle hole 17a on the inner side of the dotted frame α, and the portion with lower volume density is formed by molten filaments discharged from the nozzle hole 17a on the inner side of the dotted frame β, thereby making it easy to manufacture the cushion pad. Fig.12 The filament three-dimensional assembly 3DF manufactured by the manufacturing device 1 of the illustrated nozzle portion 17 is cut and separated into a portion formed by molten filaments discharged from the nozzle hole 17a on the inner side of the dotted frame α and a portion formed by molten filaments discharged from the nozzle hole 17a on the inner side of the dotted frame β. These portions can also be used as a structural cushion Z2 of the second embodiment or a structural cushion Z4 of the fourth embodiment, respectively.

[0110] exist Fig.12 In the example shown, all nozzle holes are circular when viewed from below and have a nozzle diameter of 1.2 mm, but the nozzle interval for the nozzle hole 17a disposed inside the dotted frame α is 10 mm, and the nozzle interval for the nozzle hole 17a disposed inside the dotted frame β is 15 mm. Fig.13 FIG. 2 shows another example of the appearance of the nozzle portion 17 when viewed from below. Fig.13 In the nozzle section 17 shown, all nozzle holes are circular when viewed from below and have a nozzle diameter of 0.8 mm, but the nozzle holes 17a disposed inside the dotted line frame α and the nozzle holes 17a disposed inside the dotted line frame β have different nozzle intervals. Fig.13In the example shown, the nozzle interval for the nozzle holes 17a provided inside the dotted-line frame α is 10 mm, and the nozzle interval for the nozzle holes 17a provided inside the dotted-line frame β is 15 mm.

[0111] Furthermore, the cross-sectional shape, nozzle diameter, nozzle interval, or arrangement of the plurality of nozzle holes 17a in the nozzle portion 17 can be appropriately adjusted so that a three-dimensional filament complex having a desired volume density can be produced.

[0112] 6. Others

[0113] The shoulder cushion 101 of the first embodiment is a cushion formed by arranging a shoulder upper cushion 101A (upper cushion) and a shoulder lower cushion 101B (lower cushion) composed of a three-dimensional combination of filaments in an overlapping manner in the vertical direction, and the shoulder upper cushion 101A and the shoulder lower cushion 101B can be interchanged and reversed in the vertical direction. Furthermore, in the shoulder cushion 101, at least three of the rebound characteristics Fb of the upper surface of the shoulder upper cushion 101A, the rebound characteristic Fa of the lower surface of the shoulder upper cushion 101A, the rebound characteristic Fc of the upper surface of the shoulder lower cushion 101B, and the rebound characteristic Fd of the lower surface of the shoulder lower cushion 101B (all four rebound characteristics) are different from each other.

[0114] According to the shoulder cushion pad 101 having such a feature (for convenience, it is set as the "first feature"), by replacing the upper cushion pad and the lower cushion pad having different rebound characteristics on the upper surface and the lower surface, or by flipping the upper cushion pad or the lower cushion pad respectively, 8 configuration modes can be obtained for the configuration of the upper cushion pad and the lower cushion pad. Therefore, for the rebound characteristics of the upper surface of the shoulder cushion pad 101, up to 8 options can be obtained, so the shoulder cushion pad 101 becomes a cushion pad with many options when adjusting the rebound characteristics. In this way, with respect to the shoulder cushion pad 101, even if the weight or muscle mass of the user changes, there are many options for adjusting the rebound characteristics, so that the frequency of replacing the old cushion pad in use with other new cushion pads can be suppressed. In addition, the waist cushion pad 102 and the leg cushion pad 103 of the first embodiment, and the cushion pads of the pillow cushion pad 301 of the third embodiment also have the same features as the first feature.

[0115] The mattress 100 of the first embodiment is a mattress that supports a user who sleeps in an upward position, and includes a plurality of cushion pads X arranged in a row in the height direction of the user. At least one of the plurality of cushion pads X is a specific cushion pad having the first feature or a feature equivalent thereto.

[0116] Therefore, in the mattress 100, in at least one of the specific cushion pads that supports the specified part (shoulder, waist, leg, etc.) of the user, by exchanging the upper cushion pad and the lower cushion pad having different rebound characteristics on the upper surface and the lower surface, or by flipping the upper cushion pad or the lower cushion pad, eight configuration modes can be obtained for the configuration of the upper cushion pad and the lower cushion pad. Therefore, the rebound characteristics of the upper surface of the characteristic cushion pad can be changed in up to eight ways, so that a mattress with many options for adjusting the rebound characteristics can be obtained. As a result, even if the user's body shape such as weight or muscle mass changes, it is easy to adjust the rebound characteristics according to the user's body shape.

[0117] In addition, the plurality of cushion pads X include a shoulder cushion pad 101 for supporting the shoulder, a waist cushion pad 102 for supporting the waist, and a leg cushion pad 103 for supporting the leg as specific cushion pads, and the upper cushion pads (i.e., the shoulder upper cushion pad 101A, the waist upper cushion pad 102A, and the leg upper cushion pad 103A) and the lower cushion pads (i.e., the shoulder lower cushion pad 101B, the waist lower cushion pad 102B, and the leg lower cushion pad 103B) among these cushion pads 101 to 103 all have the same outer shape.

[0118] Therefore, in the mattress 100, by exchanging the cushion pads of the shoulder upper cushion pad 101A, the shoulder lower cushion pad 101B, the waist upper cushion pad 102A, the waist lower cushion pad 102B, the leg upper cushion pad 103A, and the leg lower cushion pad 103B with each other or flipping them over, eight arrangement patterns are obtained for the arrangement of the upper cushion pads and the lower cushion pads in each of the shoulder cushion pad 101, the waist cushion pad 102, and the leg cushion pad 103. Therefore, the rebound characteristics of the upper surfaces of the eight shoulder, waist, and leg cushion pads 101 to 103 can be changed, so that a mattress with many options for adjusting the rebound characteristics can be obtained.

[0119] Furthermore, since the outer shapes of the shoulder upper cushion pad 101A, the shoulder lower cushion pad 101B, the waist upper cushion pad 102A, the waist lower cushion pad 102B, the leg upper cushion pad 103A, and the leg lower cushion pad 103B are all the same, the upper cushion pad or the lower cushion pad can be replaced between the shoulder, waist, and waist cushion pads 101 to 103 without changing the overall outer shape of the mattress 100. As a result, a large number (for example, 16 types) of upper and lower cushion pad arrangement patterns can be obtained in the shoulder, waist, and waist cushion pads 101 to 103, and accordingly, more options can be provided for adjusting the rebound characteristics of the upper surfaces of the shoulder, waist, and waist cushion pads 101 to 103.

[0120] In addition, the shoulder cushion 201 of the second embodiment is a cushion formed by arranging three or more specified numbers (four in the example of the second embodiment) of cushioning pads Z2 that are constructed by a three-dimensional combination of filaments in such a way that the rebound characteristics of the upper surface and the lower surface are the same in an overlapping manner in the upper and lower directions. Among the specified number of cushioning pads Z2, the rebound characteristics of the upper surfaces are different, and the appearances are all the same, and they can be exchanged with the other cushioning pads Z2.

[0121] According to the shoulder cushion pad 201 having such a feature (for convenience, it is set as the "second feature"), at least 6 options can be obtained as the configuration mode of the component cushion pad Z2, so that the degree of freedom of adjustment of the rebound characteristic can be improved. In addition, since the outer shapes of the specified number of component cushion pads Z2 are all the same, the positions of the specified number of component cushion pads Z2 can be exchanged without changing the overall outer shape of the shoulder cushion pad 201. In addition, the waist cushion pad 202 and the leg cushion pad 203 of the second embodiment, and the cushion pads of the pillow cushion pad 401 of the fourth embodiment also have the same features as the second feature.

[0122] In addition, the mattress 200 of the second embodiment is a mattress that supports a user who takes an upward sleeping posture, and has a plurality of cushion pads arranged in a manner of being arranged in the height direction of the user, and at least one of the plurality of cushion pads is a cushion pad having the second feature or a feature equivalent thereto. Therefore, the mattress 200 can support various parts (such as shoulders, waist, and legs, etc.) at different positions in the height direction of the user, and the cushion pads corresponding to the various parts can increase the degree of freedom of adjustment of the rebound characteristics. As a result, even if the user's body shape such as weight or muscle mass changes, it is easy to adjust the rebound characteristics according to the user's body shape.

[0123] In addition, the mattress 200 of the second embodiment is a mattress for supporting a user who takes an upward sleeping posture, and has a plurality of cushion pads arranged in a manner arranged in the height direction of the user, the plurality of cushion pads including a shoulder cushion pad 201 for supporting shoulders, a waist cushion pad 202 for supporting waist, and a leg cushion pad 203 for supporting legs.

[0124] Furthermore, the shoulder cushion 201 is formed by arranging three or more predetermined number (four in the example of the second embodiment) of shoulder cushions (first cushion 201A to fourth cushion 201D of the shoulder) of a three-dimensional composite of filaments in a manner that the upper surface and the lower surface have the same rebound characteristics in an overlapping manner in the vertical direction. The waist cushion 202 is formed by arranging the predetermined number of waist cushions (first cushion 202A to fourth cushion 202D of the waist) of a three-dimensional composite of filaments in a manner that the upper surface and the lower surface have the same rebound characteristics in an overlapping manner in the vertical direction. The leg cushion 203 is formed by arranging the predetermined number of leg cushions (first cushion 203A to fourth cushion 203D of the leg) of a three-dimensional composite of filaments in a manner that the upper surface and the lower surface have the same rebound characteristics in an overlapping manner in the vertical direction. Furthermore, the shoulder-forming cushion pads 201A to 201D, the waist-forming cushion pads 202A to 202D, and the leg-forming cushion pads 203A to 203D have different spring-back characteristics on their upper surfaces and all have the same outer shapes.

[0125] Therefore, in the mattress 200, the arrangement of each constituent cushion pad Z2 can be freely changed for each cushion pad 201 to 203 that supports the user's shoulders, waist, and legs, respectively, without changing the overall shape of the mattress 200. As a result, the degree of freedom in adjusting the rebound characteristics of each cushion pad that supports the user's shoulders, waist, and legs, respectively, becomes very high.

[0126] According to the present invention, since there are many configuration patterns of the cushion pads constituting the cushion pad, there are many options (degree of freedom of adjustment) for adjusting the rebound characteristics of the cushion pad, and the frequency of replacing the cushion pad in use with other new cushion pads can be reduced. As a result, the frequency of discarding the old cushion pad in use and replacing it with other new cushion pads can be reduced.

[0127] Furthermore, the embodiments described above should be considered to be illustrative and non-restrictive in all aspects. It should be understood that the technical scope of the present invention is represented by the claims rather than the description of the embodiments described above, and includes all changes within the meaning and scope equivalent to the claims. In addition, the cushion pad of the present invention can be used for various articles having a cushion pad in addition to a mattress, a pillow, or a chair.

[0128] [Industrial Applicability]

[0129] The present invention can be used, for example, in cushioning pads that can be used in mattresses, pillows, or chairs.

[0130] Description of Figure Numbers

[0131] 1: Apparatus for manufacturing three-dimensional filament composites

[0132] 10: Melt filament supply unit

[0133] 11: Pressurized melting section

[0134] 11a: Barrel

[0135] 11b: Barrel discharge port

[0136] 12: Filament discharge section

[0137] 12a: Diversion path

[0138] 13: Material input department

[0139] 14: Screw

[0140] 15: Screw motor

[0141] 16: Screw heater

[0142] 17: Nozzle

[0143] 17a: Nozzle hole

[0144] 18: Mold heater

[0145] 20: Welding forming part

[0146] 21: Cooling water tank

[0147] 22, 23: Slide

[0148] 24, 25: Cooling water supply unit

[0149] 26, 27: Annular conveyor belt

[0150] 28~35: conveyor roller

[0151] 100, 200: Mattress

[0152] 101, 201: Shoulder cushion

[0153] 102, 202: Lumbar cushion

[0154] 103, 203: Leg cushion

[0155] 101A: Shoulder upper cushion

[0156] 101B: Shoulder cushion

[0157] 102A: Lumbar cushion

[0158] 102B: Lumbar cushion

[0159] 103A: Leg cushion

[0160] 103B: Leg cushion

[0161] 104, 204: Mattress cover

[0162] 201A: Shoulder first cushion

[0163] 201B: Second shoulder cushion

[0164] 201C: Third shoulder cushion

[0165] 201D: Shoulder fourth cushion

[0166] 202A: Lumbar first cushion

[0167] 202B: Second cushion at waist

[0168] 202C: The third cushion at the waist

[0169] 202D: Waist fourth cushion

[0170] 203A: Leg first cushion

[0171] 203B: Second leg cushion

[0172] 203C: Third leg cushion

[0173] 203D: Leg fourth cushion

[0174] 300, 400: pillow

[0175] 301, 401: pillow cushion

[0176] 301A: Pillow cushion

[0177] 301B: cushion under pillow

[0178] 302, 402: pillow cover

[0179] 401A: Pillow First Cushion

[0180] 401B: Pillow Second Cushion

[0181] 401C: Pillow Third Cushion

[0182] 401D: Pillow Fourth Cushion

Claims

1. A cushion pad, comprising an upper cushion pad and a lower cushion pad composed of a three-dimensional combination of filaments arranged in an overlapping manner in the vertical direction, wherein the cushion pad is characterized in that: The upper cushion and the lower cushion can be interchanged and reversed in the up and down directions. At least three of the rebound characteristics of the upper surface of the upper cushion pad, the rebound characteristics of the lower surface of the upper cushion pad, the rebound characteristics of the upper surface of the lower cushion pad, and the rebound characteristics of the lower surface of the lower cushion pad are different from each other.

2. A mattress that supports a user who sleeps in an upward position, the mattress being characterized in that: The device comprises a plurality of cushion pads arranged in a row in the height direction of the user, At least one of the plurality of cushioning pads is a specific cushioning pad that is the cushioning pad according to claim 1 .

3. The mattress according to claim 2, It is characterized in that The plurality of cushion pads include: a shoulder cushion pad for supporting shoulders, a waist cushion pad for supporting waist, and a leg cushion pad for supporting legs as the specific cushion pads, The upper cushioning pad and the lower cushioning pad of the shoulder cushioning pad, the waist cushioning pad, and the leg cushioning pad all have the same appearance.

4. A cushion pad, comprising three or more cushion pads of a predetermined number, each of which is composed of a three-dimensional filament combination body having the same rebound properties on the upper surface and the lower surface, and arranged in an overlapping manner in the vertical direction, wherein the cushion pad is characterized in that: The predetermined number of constituent cushion pads have different rebound characteristics and all have the same outer shape.

5. A mattress for supporting a user who sleeps in an upward position, wherein: The device comprises a plurality of cushion pads arranged in a row in the height direction of the user, At least one of the plurality of cushions is the cushion according to claim 4.

6. A mattress for supporting a user who sleeps in an upward position, wherein: The device comprises a plurality of cushion pads arranged in a row in the height direction of the user, The plurality of cushion pads include: a shoulder cushion pad for supporting shoulders, a waist cushion pad for supporting waist, and a leg cushion pad for supporting legs. The shoulder cushion is formed by arranging three or more shoulder cushions of a predetermined number, each of which is composed of a three-dimensional filament combination body and has the same rebound properties on the upper surface and the lower surface, in an overlapping manner in the vertical direction. The waist cushion pad is formed by a three-dimensional combination of filaments in such a way that the upper surface and the lower surface have the same rebound characteristics, and the predetermined number of waist cushion pads are arranged in an overlapping manner in the vertical direction. The leg cushion pad is formed by arranging the predetermined number of leg cushion pads in an overlapping manner in the vertical direction, which are formed by a three-dimensional combination of filaments in such a way that the upper surface and the lower surface have the same rebound characteristics. The shoulder-forming cushion pads, the waist-forming cushion pads, and the leg-forming cushion pads have different rebound characteristics and all have the same outer shapes.

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