Cushion and cushion arrangement structure

Abstract

To provide a cushion capable of supporting and holding the sitting posture of a user or the posture of the back part or head part of the body, excellent in handleability and applicable to wide uses such as a furniture chair, a wheelchair, a hairdressing chair, a shampoo chair, the seat of an automobile and a bed having a reclining function.SOLUTION: The cushion A includes a main body part 1, a swelling part 2, and a swelling part 3. The main body portion 1 is a portion that serves as the main body of the cushion 1, and is a band-shaped member that connects the bulging portion 2 and the bulging portion 3. Also, the bulging portion 2 and the bulging portion 3 constitute the left and right end portions of the cushion 1, and are portions that are thicker than the main body portion 1. The swelling part 2 and the swelling part 3 are constituted so as to be bendable toward the body part 1 on both surfaces of the surface side and the back surface side of the body part 1. In addition, the bulge portion 2 or the bulge portion 3 can be rotated toward the other bulge portion while the main body portion 1 is wound, and can be formed into a shape having a larger thickness.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cushion and a cushion arrangement structure, specifically to a cushion and cushion arrangement structure that can support and maintain the user's sitting posture or the posture of the back and head, is easy to use, and can be used in a wide range of applications, such as furniture chairs, wheelchairs, hairdressing chairs, hair-washing chairs, car seats, and beds with reclining functions. [Background technology]

[0002] 2. Description of the Related Art Conventionally, in furniture chairs, wheelchairs, and the like, cushions are used together with the chairs in order to keep the seated position of a seated person in a stable state.

[0003] For example, when sitting in a chair for a long time while doing desk work or when sitting in the driver's seat of a car for a long time, cushions are placed on the seat and back of the chair to reduce strain on the body.

[0004] Additionally, for elderly people and wheelchair users, the ability to support the upper body decreases, making the sitting posture unstable when sitting in a chair or wheelchair and making it easier for the body to fall forward or sideways, so cushions are placed on the seat and back of the chair to stabilize the sitting posture.

[0005] In this context, a cushion for supporting wheelchair seating has been proposed that attempts to reduce pain in the lower back of wheelchair occupants, prevent them from tipping sideways, and provide excellent seating stability (see, for example, Patent Document 1).

[0006] The wheelchair seating position support cushion 500 described in Patent Document 1 is used by being attached to the backrest and side panels of a wheelchair or a wheelchair with a chair cover attached.

[0007] Furthermore, as shown in FIG. 36, the wheelchair seating support cushion 500 described in Patent Document 1 is composed of a lumbar support member 501 that is removably attached to the backrest of the wheelchair, abuts along the lumbar region of the seated person, and holds the lumbar region of the seated person, and a pair of flank support members 502 that are removably attached to the side panels of the wheelchair, abuts along the flank region of the seated person, and holds the flank region of the seated person.

[0008] Furthermore, in the wheelchair seating position-supporting cushion 500 described in Patent Document 1, lumbar support 501 is housed in covering 503, and hook-and-loop fasteners 503A on covering 503 are connected to hook-and-loop fasteners on the backrest of the wheelchair, thereby attaching lumbar support 501 to the backrest. Also, flank support 502 is housed in covering 504, and hook-and-loop fasteners 504A on covering 504 are connected to hook-and-loop fasteners on the side panels of the wheelchair, thereby attaching flank support 502 to the side panels.

[0009] When the wheelchair seating cushion 500 described in Patent Document 1 is attached to a wheelchair, the lumbar support 501 comes into contact with the occupant's lower back and supports the occupant's lower back, while the flank support 502 comes into contact with the occupant's sides and supports the occupant's sides, thereby stabilizing the occupant's sitting position. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-153764 Summary of the Invention [Problem to be solved by the invention]

[0011] However, the wheelchair seating cushion described in Patent Document 1 requires a hook-and-loop fastener to be provided on the wheelchair or chair cover in order to attach the cushion, which means that the objects to which it can be attached are extremely limited. Also, its use is limited to wheelchairs, and the structure does not take into consideration application to other types of chairs.

[0012] For example, when the wheelchair seating support cushion described in Patent Document 1 is to be attached to an increased number of chairs, only chairs with a shape that matches the shape of the chair cover can be attached, or a chair cover must be formed each time to fit the shape of the chair, making it practically difficult to expand the number of chairs that can be attached.

[0013] Furthermore, the wheelchair seating cushion described in Patent Document 1 is limited to a U-shape in plan view, meaning that the overall shape of the cushion cannot be changed, and the user's posture and body parts that can be supported by the cushion are also limited.

[0014] The present invention was devised in light of the above points, and aims to provide a cushion and cushion arrangement structure that can support and maintain the user's sitting posture or the posture of the back and head of the body, is easy to use, and can be used in a wide range of applications, such as furniture chairs, wheelchairs, hairdressing chairs, hair washing chairs, car seats, and beds with reclining functions. [Means for solving the problem]

[0015] In order to achieve the above-mentioned object, the cushion of the present invention comprises a main body portion formed in a band shape, a first bulge portion provided on one end edge of the longitudinal side of the main body portion, having a thickness greater than the main body portion, having a length along the longitudinal direction of the main body portion that is less than half the longitudinal length of the main body portion, and being able to be bent toward the main body portion on either the front or back side of the main body portion, and a second bulge portion provided on the other end edge of the longitudinal side of the main body portion, having a thickness greater than the main body portion, having a length along the longitudinal direction of the main body portion that is less than half the longitudinal length of the main body portion, and being able to be bent toward the main body portion on either the front or back side of the main body portion.

[0016] Here, the belt-shaped main body portion has a certain width and length, and can be placed against a part of the user's body to support the body. For example, the main body portion can be placed on the back or seat of a chair to support the user's lower back and buttocks when in a seated position.

[0017] Furthermore, the first bulge is provided on one longitudinal edge of the main body, has a thickness greater than that of the main body, and can be bent toward the main body on either the front or back side of the main body. This allows the first bulge to support the sides of the user's armpits and lower back when sitting in a chair or wheelchair with armrests. That is, for example, by placing the main body on the back or seat of the chair and bending the first bulge toward the main body along the armrests of the chair, the first bulge can be positioned between the sides of the user's armpits and lower back and the armrests. Furthermore, because the first bulge is formed to be thicker than the main body, it can fill the space between the user's body and the armrests and provide sufficient support for the body parts that come into contact with it.

[0018] Furthermore, the second bulge is provided on the other longitudinal edge of the main body, has a thickness greater than that of the main body, and can be bent toward the main body on either the front or back side. This allows the second bulge to support the sides of the user's armpits and lower back when sitting in a chair or wheelchair with armrests. That is, for example, by placing the main body on the back or seat of the chair and bending the second bulge toward the main body along the armrests of the chair, the second bulge can be positioned between the sides of the user's armpits and lower back and the armrests. Furthermore, because the second bulge is formed to be thicker than the main body, it can fill the space between the user's body and the armrests and provide sufficient support for the body parts that come into contact with it.

[0019] Furthermore, because the first and second bulges can be bent toward the main body on either the front or back side of the main body, the overall shape of the cushion can be freely changed, allowing for support to be tailored to the user's posture and the desired body part. For example, the first and second bulges can be bent approximately 90 degrees toward the main body to form a U-shape. Alternatively, the first and second bulges can be completely folded toward the main body on the same side of the front or back, creating a thicker cushion with the thickness of the main body and the thickness of the two bulges. Furthermore, by folding the first bulge toward the back side of the main body and bending the second bulge approximately 90 degrees toward the main body, the cushion can be placed on a chair with an armrest on only one side.

[0020] The belt-shaped main body has a first bulge at one longitudinal edge of the main body, and a second bulge at the other longitudinal edge of the main body, connecting the first and second bulges to both ends of the main body. This allows the main body to be hung, for example, on the top of the back of a chair or a bed with a reclining function. In this case, one of the first or second bulges can be positioned at a desired height on the backrest, and the other can be hung down on the side opposite the user's side of the backrest, allowing the bulge positioned on the backrest to support the user's body. For example, the user's lower back, back, cervical vertebrae, or head can be supported by one of the first or second bulges.

[0021] Furthermore, the belt-shaped main body, the first bulge provided on one longitudinal edge of the main body and having a length along the longitudinal direction that is less than half of the main body's length, and the second bulge provided on the other longitudinal edge of the main body and having a length along the longitudinal direction that is less than half of the main body's length, allow the first bulge and the second bulge to be folded toward the main body on the same side of the front or back surface of the main body without interfering with each other. This prevents the two bulges from overlapping with each other when a thicker cushion is made, having the same thickness as the main body and the two bulges, resulting in a comfortable feel when the cushion is placed against the body.

[0022] Furthermore, if the first and second bulges are configured so that the main body can be wrapped around one of the bulges as a core, facing the other bulge, and the shape of the main body wrapped around the core can be maintained, the cushion can be shaped to have one bulge and an enlarged portion formed by wrapping the main body around the bulge. That is, the cushion can have two bulges of significantly different sizes. For example, by tilting the back of a reclining chair or bed, the bulge around which the main body is wrapped can be positioned on the upper side and the bulge without the main body can be positioned on the lower side, allowing the cushion to fit the user's cervical vertebrae and head. For example, by using the cushion on a person receiving grooming services such as meal assistance, dental treatment, oral care, tooth brushing, or shaving in bed, the position and angle of the user's jaw can be adjusted, allowing the user to receive the services in a comfortable position. Furthermore, from the service provider's perspective, the user's posture is maintained and the head position is stabilized, allowing the service to be provided safely.

[0023] Furthermore, if the longitudinal length of the main body portion is within the range of two to three times the longitudinal length of the first bulge portion and the second bulge portion of the main body portion, the length of the main body portion can be set to an appropriate length that makes it easy to place the cushion on the back or seat of a chair.

[0024] If the longitudinal length of the main body is less than twice the longitudinal length of the first and second bulges, when the first and second bulges are folded toward the main body on the same side of the front or back of the main body, the two bulges will interfere with each other, resulting in a poor usability. Furthermore, if the longitudinal length of the main body is more than three times the longitudinal length of the first and second bulges, the main body will be longer than necessary, making it difficult to place on the back or seat of a chair or when hanging the main body from the top of the back of a chair.

[0025] Furthermore, if the first and second bulges have an elliptical cross section along the longitudinal direction of the main body and the thickness of the first and second bulges is within a range of 5 to 40 times the thickness of the main body, the feel of the first and second bulges against the user's body can be made even better. That is, the thickness of the two bulges is sufficiently large, and the area of ​​the bulges that come into contact with the body can be increased while maintaining a rounded, soft shape.

[0026] Furthermore, if the connection positions of the main body and the first bulge and the main body and the second bulge are approximately at the center of the thickness of the first bulge and the second bulge, respectively, when folding the first bulge and the second bulge onto the front or back side of the main body, each bulge can be easily folded evenly onto either side, making it easier to arrange the cushion in the shape in which the first bulge and the second bulge are folded.

[0027] Furthermore, if the main body is formed into an upper main body and a lower main body that can be separated along the thickness direction, and the contact surfaces of the upper and lower main bodies are provided with hook-and-loop fasteners that can be engaged with each other, and the longitudinal length of the main body can be adjusted by changing the joining position of the hook-and-loop fasteners, the longitudinal length of the main body can be freely adjusted simply by changing the engaging position of the hook-and-loop fasteners. This allows for even greater flexibility in changing the size of the cushion to suit the size and shape of the chair and the desired part of the user's body that needs to be covered.

[0028] In order to achieve the above object, the cushion of the present invention comprises a first main body portion formed in a band shape; a first bulge portion provided on one end edge of the first main body portion in a longitudinal direction, the first bulge portion having a thickness greater than that of the first main body portion, a length along the longitudinal direction of the first main body portion that is equal to or less than half the length of the first main body portion in the longitudinal direction, and capable of being bent toward the first main body portion on either the front or back surface side of the first main body portion; a second bulge portion provided on the other end edge of the first main body portion, the second bulge portion having a thickness greater than that of the first main body portion, a length along the longitudinal direction of the first main body portion that is equal to or less than half the length of the first main body portion in the longitudinal direction, and capable of being bent toward the first main body portion on either the front or back surface side of the first main body portion; and a second bulge portion formed in a band shape and attached to one end edge of the first main body portion in a transverse direction. a second main body portion formed in a band shape and attached to one of the edges of the upper and lower connection portions opposite to one edge on the short side of the first main body portion; a third bulge portion provided on one edge of the long side of the second main body portion, having a thickness greater than that of the second main body portion, the length along the long side of the second main body portion being equal to or less than half the length of the second main body portion in the long side, and being bendable toward the second main body portion on either the front or back side of the second main body portion; and a fourth bulge portion provided on the other edge of the long side of the second main body portion, having a thickness greater than that of the second main body portion, the length along the long side of the second main body portion being equal to or less than half the length of the second main body portion in the long side, and being bendable toward the second main body portion on either the front or back side of the second main body portion.

[0029] Here, a cushion having a certain length in the direction along the short side of the first main body can be formed by using a first main body formed in a belt shape, an upper and lower connecting part formed in a belt shape and attached to one edge of the first main body in the short side direction, and a second main body formed in a belt shape and attached to the edge of the upper and lower connecting part opposite to the one edge of the first main body in the short side direction. Thus, for example, when placing the cushion in a chair having a backrest and a seat, by placing the first main body and the upper and lower connecting part on the backrest side and the second main body on the seat side, it is possible to support a wide range of body parts, from the buttocks to the waist and back of the user.

[0030] Furthermore, the third bulge is positioned along the vertical direction on one side of the armrest and bent toward the other side of the second main body, and the fourth bulge is positioned along the vertical direction on the other side of the armrest and bent toward the other side of the second main body, and the first bulge is positioned along the extension direction on one side of the armrest and bent toward the other side of the first main body, and the second bulge is positioned along the extension direction on the other side of the armrest and bent toward the other side of the first main body, so that the left and right sides of the user's waist, both sides of the back, and the outer sides of both arms and both shoulders can be stably supported by each bulge. In other words, the left and right sides of the user's waist can be supported by the third and fourth bulges positioned on the seat side. In addition, the first and second bulges located on the backrest side can support the left and right sides of the user's back, arms, and shoulders. In this way, the four bulges can stably support the user, as if enveloping both sides of the body.

[0031] Furthermore, the cushion includes a first connecting portion that connects the main body portion and the first inflatable portion and separates them, and a second connecting portion that connects the main body portion and the second inflatable portion and separates them. If the main body portion, the first inflatable portion, and the second inflatable portion are each adjustable in their inflatability by injecting water or air into them, the overall shape can be easily deformed by bending the first inflatable portion or the second inflatable portion relative to the main body portion. Furthermore, the shape and inflatability can be easily adjusted by simply changing the amount of water or air injected into each of the main body portion, the first inflatable portion, and the second inflatable portion. Furthermore, by draining the water or air when not in use, the entire cushion can be made compact, improving portability. For example, the cushion can be used as a water pillow by injecting cold water, or by injecting warm water to warm the area of ​​the body it is placed against, relieving pain such as lower back pain. In addition, the degree of swelling of the first swelling portion and the second swelling portion can be easily made different. Furthermore, by allowing the main body portion to swell as well, the cushioning properties of the main body portion can be improved.

[0032] Furthermore, if the main body portion is formed parallel to the short side of the main body portion and shorter than the short side of the main body portion, and has multiple main body portion vertical dividers that divide the main body portion into multiple inflated compartments along the length of the main body portion, when the main body portion is inflated by injecting water or air, the main body portion can be inflated into multiple inflated compartments along the length of the main body portion rather than into a single large inflated shape. This makes it easier to fit the main body portion around the user's waist or neck, increases the number of areas of the main body portion that come into contact with the body, and enables more stable support of body parts. Furthermore, because the main body portion vertical dividers are formed shorter than the short side of the main body portion, the interior of the main body portion is not completely partitioned, and simply providing a single inlet in the main body portion allows water or air to circulate throughout the interior of the main body portion.

[0033] Furthermore, if the first bulge is oriented parallel to the short side of the main body and is shorter than the distance of the first bulge in the short side of the main body, and has a first partition that divides the first bulge into multiple bulge compartments along the longitudinal direction of the main body, when water or air is injected into the first bulge to cause it to bulge, the first bulge can be divided into multiple bulge compartments along the longitudinal direction of the main body rather than becoming a single large bulge. This allows the first bulge to have a shape that bulges widely along the longitudinal direction of the main body, making it easier to fit the first bulge around the user's waist or neck, and increasing the number of areas where the first bulge comes into contact with the body, allowing for more stable support of body parts. Furthermore, since the first partition portion is formed shorter than the short-side distance of the main body portion in the first bulge portion, the inside of the first bulge portion is not completely partitioned, and water or air can be distributed throughout the inside of the first bulge portion simply by providing one inlet for the first bulge portion.

[0034] Furthermore, if the second bulge is oriented parallel to the short side of the main body and is shorter than the distance of the second bulge in the short side of the main body, and has second partitions that divide the second bulge into multiple bulge compartments along the longitudinal direction of the main body, when water or air is injected into the second bulge to cause it to bulge, the second bulge can be shaped to bulge into multiple bulge compartments along the longitudinal direction of the main body, rather than into a single large bulge. This allows the second bulge to have a shape that bulges widely along the longitudinal direction of the main body, making it easier to fit the second bulge around the user's waist or neck, and increasing the number of areas where the second bulge comes into contact with the body, allowing for more stable support of body parts. Furthermore, since the second partition portion is formed shorter than the short-side distance of the main body portion in the second bulge portion, the interior of the second bulge portion is not completely partitioned, and water or air can be distributed throughout the interior of the second bulge portion simply by providing one inlet for the second bulge portion.

[0035] Furthermore, if the main body portion has multiple horizontal dividers that are parallel to the longitudinal direction of the main body portion and shorter than the longitudinal distance of the main body portion, and that divide the main body portion into multiple inflated compartments along the lateral direction of the main body portion, when the main body portion is inflated by injecting water or air, the main body portion can be inflated into multiple inflated compartments along the lateral direction of the main body portion rather than into a single large inflated shape. This makes it easier to fit the main body portion around the user's waist or neck, increases the number of areas of the main body portion that come into contact with the body, and enables more stable support of body parts. Furthermore, because the horizontal dividers are shorter than the longitudinal distance of the main body portion, the interior of the main body portion is not completely partitioned, and simply providing a single inlet in the main body portion allows water or air to circulate throughout the interior of the main body portion.

[0036] Furthermore, when there is a first connecting portion that connects the main body portion and the first bulge portion and separates the main body portion from the first bulge portion, and a second connecting portion that connects the main body portion and the second bulge portion and separates the main body portion from the second bulge portion, it becomes easier to bend the first bulge portion or the second bulge portion relative to the main body portion and deform the overall shape.

[0037] Furthermore, when the main body portion is composed of a cover body, and at least one of the first and second inflatable portions is composed of an inflatable portion cover body, which is also a cover body, and at least one of a cushion filling material consisting of a plurality of chip-shaped members placed inside the inflatable portion cover body and an expandable cushion material filled with water or air, a cushion with a simple structure and sufficient expansion can be formed by forming the outer portions of the main body portion and at least one of the first and second inflatable portions with a cover body, and placing at least one of the cushion filling material and the expandable cushion material inside the portion of the cover body that is desired to be inflated. Furthermore, the degree of expansion can be easily adjusted in at least one of the first and second inflatable portions by simply changing the amount of chip-shaped members or the amount of water (air) injected.

[0038] Furthermore, when at least one of the first and second inflatable portions has a cushion core disposed inside the inflatable portion cover, and the cushion core is formed by combining multiple inner materials with different amounts of chip-shaped components, the degree of inflation of at least one of the first and second inflatable portions can be easily adjusted by simply changing the combination of inner materials with different sizes and placing them inside the inflatable portion cover. That is, for example, by preparing inner materials of large, medium, and small sizes with different amounts of chip-shaped components, and simply inserting and removing each inner material into and from the inflatable portion cover, the desired degree of inflation can be easily adjusted.

[0039] Furthermore, when at least one of the first and second inflatable portions has a cushion core and an expandable cushion material disposed inside the inflatable portion cover, the degree of expansion of at least one of the first and second inflatable portions can be easily adjusted using both the cushion core and the expandable cushion material. That is, for example, by providing a rough degree of expansion with the cushion core and fine-tuning the degree of expansion of the expandable cushion material, it is possible to easily fine-tune the overall degree of expansion of at least one of the first and second inflatable portions.

[0040] Furthermore, when an expandable cushion material is placed inside the bulge cover body of each of the first bulge portion and the second bulge portion, both the first bulge portion and the second bulge portion can be inflated via the expandable cushion material.

[0041] Furthermore, when the main body portion is composed of a main body cover and a main body expandable cushion material that is disposed inside the main body cover, has the same size as the main body cover, and is filled with water or air, the cushioning properties of the main body portion can be improved and the degree of expansion of the main body portion can be adjusted with a high degree of freedom. That is, the main body portion is formed to be longer in the longitudinal direction than the first and second expansion portions and occupies the majority of the entire cushion, which improves the cushioning properties of the entire cushion, and the ability to adjust the degree of expansion of the main body portion with a high degree of freedom makes it even easier to match the shape of the cushion to the user's body shape and preferences.

[0042] Furthermore, when the main body portion is composed of a main body cover and at least one of a cushion filler made of multiple chip-shaped materials and multiple expandable main body partition cushion materials filled with water or air, which are arranged inside the main body cover in a direction parallel to the short side of the main body portion and divide the main body portion into multiple inflatable compartments along the longitudinal direction of the main body portion, it is possible to insert or remove at least one of the multiple cushion fillers and the multiple expandable main body partition cushion materials inside the main body cover, thereby making the main body portion expand into multiple inflatable compartments along the longitudinal direction of the main body portion rather than a single large inflated shape. This makes it easier to fit the main body portion to the user's waist and neck, and increases the number of areas of the main body portion that come into contact with the body, allowing for more stable support of body parts. The shape and degree of expansion of the expandable main body partition cushion materials can be easily adjusted by simply changing the amount of water or air injected.

[0043] Furthermore, when a cushion inner material is placed inside the bulge cover body of each of the first bulge portion and the second bulge portion, both the first bulge portion and the second bulge portion can be inflated via the cushion inner material.

[0044] Furthermore, if the main body is made up of a main body cover and a plate-shaped urethane material that is placed inside the main body cover and has the same size as the main body cover, the cushioning properties of the main body can be improved. That is, the main body is formed to be longer than the first bulge and the second bulge in the longitudinal direction and occupies the majority of the entire cushion, thereby improving the cushioning properties of the entire cushion.

[0045] Furthermore, if the main body is composed of a main body cover and a plate-shaped urethane material of the same size as the main body cover that is retractably placed inside the main body cover, the cushioning properties of the main body can be improved, and the user can choose between a structure with urethane material placed inside the main body cover and a structure without urethane material, allowing the cushioning properties of the main body to be varied according to the user's preference. For example, in cases where the cushion is used as a pillow or where the entire cushion is used by deforming it into a concave shape, it may be more convenient to use the cushion without placing urethane material inside the main body cover, and this design can be easily applied to such usage patterns.

[0046] Furthermore, if the urethane material is covered with an inner cover that can be placed inside the main body cover and can accommodate the urethane material inside, the insertion process becomes easier when inserting the urethane material inside the main body cover. In other words, in a structure where the urethane material is not covered with an inner cover, the surface of the urethane material is prone to getting caught on the inner periphery of the main body cover due to the nature of the urethane material, making the insertion process time-consuming. However, by covering the urethane material with an inner cover, the urethane material's tendency to get caught is reduced, making it easier to insert the urethane material inside the main body cover.

[0047] Furthermore, if the main body cover body is formed with a main body cover opening / closing section that allows the state of the main body cover body to be switched between an open state in which an opening is formed to allow the urethane material and inner cover to be inserted and removed, and a closed state in which the opening is closed, the urethane material and inner cover can be inserted inside the main body cover body and the opening can be closed by the main body cover opening / closing section, making it less likely for the inserted position to shift and preventing the urethane material and inner cover from flying out from the main body cover body.

[0048] Furthermore, if the bulge cover body is formed with a bulge cover opening / closing section that allows the state of the bulge cover body to be freely switched between an open state in which an opening is formed to allow the cushion filling material or expandable cushion material to be inserted and removed, and a closed state in which the opening is closed, the cushion filling material or expandable cushion material can be inserted inside the main body cover body and the opening closed by the main body cover opening / closing section, making it less likely for the inserted position to shift and preventing the cushion filling material or expandable cushion material from flying out from the main body cover body.

[0049] Furthermore, if multiple loops through which a string or belt can be passed are formed in at least one of the main body, the first bulge, the second bulge, the first connecting portion, or the second connecting portion, the cushion can be easily secured to the back or seat of a chair or the like by passing the string or belt through the multiple loops. This improves the stability of the cushion when installed on a chair or car seat. Furthermore, when the cushion is installed in, for example, a hospital or nursing home, the cushion's installation position can be fixed, improving convenience.

[0050] Furthermore, if the main body is composed of a main body cover and a plurality of rectangular urethane material strips arranged inside the main body cover in a direction parallel to the short side of the main body and dividing the main body into a plurality of bulging sections along the length of the main body, the plurality of rectangular urethane material strips can be inserted and removed from the inside of the main body cover to give the main body a shape that is divided into a plurality of bulging sections along the length of the main body, rather than a single large bulge. This makes it easier to fit the main body around the user's waist and neck, and increases the number of areas of the main body that come into contact with the body, enabling more stable support of body parts.

[0051] Furthermore, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which a cushion as described in any one of claims 1, 8 or 11 is arranged on a chair having a seat, a backrest and armrests on the outside of both ends of the seat, and the cushion is arranged so that one side of the main body is located on the backrest, the first bulge portion is located along the extending direction of one side of the armrest and toward the other side of the main body, and the second bulge portion is located along the extending direction of the other side of the armrest and toward the other side of the main body.

[0052] Here, by placing a cushion on the backrest so that one side of the main body is positioned, the other side of the main body can be placed against the user's lower back when in a seated position, thereby maintaining the seated position.

[0053] Furthermore, by positioning a first bulge portion along the extending direction of one side of the armrest and bent toward the other side of the main body, and by positioning a second bulge portion along the extending direction of the other side of the armrest and bent toward the other side of the main body, the first bulge portion or the second bulge portion can be positioned between the sides of the user's armpits and waist and the two armrests of the chair, respectively, to support the sides of the user's armpits and waist when in a seated position.

[0054] In addition, in a cushion arrangement structure in which a second cushion is arranged on top of a first cushion that is arranged on the backrest, the main body of the second cushion is hooked onto the upper part of the backrest and the upper edge of the main body of the first cushion, and when the second cushion is arranged so that one of the first bulges or the second bulges of the second cushion is located on the surface of the main body of the first cushion that faces the user, the two cushions can adequately support the armpits, sides of the lumbar region, and back of the user in a sitting position. Furthermore, because one of the first bulges or the second bulges of the second cushion is located on the main body of the first cushion, with the lumbar region supported by the main body of the first cushion, one bulge of the second cushion further supports the user's back, resulting in a structure that makes it easy to support the back of a user with a hunched back or rounded shoulders.

[0055] Furthermore, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which a cushion as described in any one of claims 1, 8 or 11 is arranged on a chair having a seat, a backrest and armrests on the outside of both ends of the seat, and the cushion is arranged so that one side of the main body is located on the seat, the first bulge portion is located along the vertical direction of one side of the armrest and bent toward the other side of the main body, and the second bulge portion is located along the vertical direction of the other side of the armrest and bent toward the other side of the main body.

[0056] Here, by placing a cushion on the seat so that one side of the main body is positioned, the other side of the main body can be placed against the user's buttocks when in a seated position, thereby maintaining the seated position.

[0057] Furthermore, by positioning a first bulge portion along the vertical direction on one side of the armrest and bent toward the other side of the main body, and by positioning a second bulge portion along the vertical direction on the other side of the armrest and bent toward the other side of the main body, the first bulge portion or the second bulge portion can be positioned between the sides of the user's armpits and waist and the two armrests of the chair, respectively, to support the sides of the user's armpits and waist when in a seated position.

[0058] Furthermore, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which a cushion as described in any one of claims 1, 8 or 11 is arranged on an automobile seat having a seat surface, a backrest and an armrest arranged inside the vehicle, and the cushion is arranged on the backrest so that one side of the main body and the first bulge folded toward the one side of the main body are positioned, and the second bulge folded along the extending direction of the armrest and toward the other side of the main body are positioned.

[0059] Here, by locating the first bulge bent toward one side of the main body and one side of the main body, and by locating the second bulge bent toward the other side of the main body along the extension direction of the armrest, it becomes possible to provide sufficient support for the sides of the user's armpits and waist in an automobile seat that has an armrest on the interior side of the vehicle. That is, by locating the second bulge along the armrest and locating the first bulge bent toward the backrest on the opposite side of the seat without the armrest, it becomes possible to arrange two bulges in a shape that matches the presence or absence of an armrest.

[0060] In addition, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which a cushion described in any one of claims 1, 8 or 11 is arranged on a chair having a seat and a backrest or a bed having a reclining backrest, wherein the main body portion is hooked onto the top of the backrest and the cushion is arranged so that either the first bulge portion or the second bulge portion is positioned on the user-facing surface of the backrest.

[0061] Here, by hooking the main body onto the top of the backrest and positioning the cushion so that either the first or second bulge is located on the user-facing side of the backrest, one of the first or second bulge can be positioned at any height on the backrest, with the other hanging down on the side opposite the user-facing side of the backrest, allowing the bulge positioned on the backrest side to support the user's body. For example, the user's lower back, back, cervical vertebrae, head, etc. can be supported by one of the first or second bulge.

[0062] In addition, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which a cushion described in any one of claims 1, 8 or 11 is arranged in a bed having a reclining backrest, and the cushion is arranged in a state in which the main body part is wrapped around one of the first bulge part and the second bulge part as a core, facing in the direction of the other bulge part, and the other bulge part is positioned below the one bulge part along the backrest.

[0063] Here, the cushion is arranged with the main body wrapped around one of the first and second bulges, with the other bulge positioned below the first bulge, along the backrest. This allows for a cushion with a shape consisting of one bulge and an enlarged portion formed by wrapping the main body around the bulge. In other words, a cushion with two bulges of significantly different sizes can be arranged. For example, by tilting the backrest of a reclining bed, the bulge around the main body can be positioned on the upper side and the other bulge can be positioned on the lower side, allowing the cushion to fit the user's cervical vertebrae and head. For example, by using this cushion on a person receiving grooming services such as meal assistance, dental treatment, oral care, tooth brushing, or shaving in bed, the position and angle of the user's jaw can be adjusted, allowing the user to receive the services in a comfortable position. Furthermore, from the service provider's perspective, the user's posture is maintained and the head position is stabilized, allowing the service to be provided safely.

[0064] In addition, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which a cushion described in any one of claims 1, 8 or 11 is arranged on a chair having a seat and a backrest or a bed having a reclining backrest, and the cushion is arranged with one side of the main body portion positioned on the backrest and the first bulge portion and the second bulge portion folded toward the other side of the main body portion.

[0065] Here, one side of the main body is positioned on the backrest, and the cushion is placed with the first bulge and the second bulge folded toward the other side of the main body. This makes it possible to place a thicker cushion on the backrest, with the thickness of the main body and the thickness of the two bulges, and the thicker part of the cushion can firmly support the user's back. In addition, because the two bulges support the user's back, it is possible to prevent the body from swaying from side to side.

[0066] Furthermore, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which two cushions as described in any one of claims 1, 8 or 11 are arranged in a chair having a seat and a backrest or a bed having a reclining backrest, wherein the first cushion, which is the first cushion, is arranged so that the main body portion of the first cushion is hooked onto the upper part of the backrest and one of the first bulge portion or the second bulge portion of the first cushion is positioned on the user's side of the backrest, and the second cushion, which is the second cushion, is arranged so that the main body portion of the second cushion is placed on top of a part of the main body portion of the first cushion and one of the bulges of the first cushion, and the first bulge portion and the second bulge portion of the second cushion are folded toward the side opposite the side of the main body portion of the second cushion facing the first cushion.

[0067] Here, the main body of the first cushion is hooked onto the top of the backrest, and the first cushion is positioned so that one of the first or second bulges on the first cushion is positioned on the user-facing surface of the backrest, making it possible to position one of the bulges on the first cushion on the backrest and support the user's shoulders and cervical vertebrae.

[0068] Furthermore, the main body of the second cushion is positioned over a portion of the main body of the first cushion and one of the bulges of the first cushion, and the first and second bulges of the second cushion are folded toward the surface of the main body of the second cushion opposite the surface facing the first cushion. This allows the second cushion, which has a thicker shape, to be placed on top of the first cushion to firmly support the user's body. In particular, while the first cushion supports the user's shoulders and cervical vertebrae, the two bulges of the second cushion can stably support a wide area from the user's shoulders to the back of the head. Furthermore, the two bulges support the user's back, preventing the body from swaying side to side. Furthermore, the overlapping of the first and second cushions further improves the comfort of use for body parts supported by the two cushions, such as the user's head.

[0069] In order to achieve the above object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which two cushions according to any one of claims 1, 8 and 11 are arranged on a chair having a seat, a backrest and armrests on the outside of both ends of the seat, wherein one surface of the main body of the first cushion is positioned on the seat, and the first bulging portion of the first cushion, which is bent along the vertical direction of one of the armrests and towards the other surface of the main body of the first cushion, is positioned along the vertical direction of the other of the armrests and towards the other surface of the main body of the first cushion. The second cushion is positioned so that one side of the main body of the second cushion is positioned above the first cushion and on the backrest, and the first bulge of the second cushion, which is bent toward the other side of the main body of the second cushion, is positioned along the direction in which the armrest extends on one side, and the second bulge of the second cushion, which is bent toward the other side of the main body of the second cushion, is positioned along the direction in which the armrest extends on the other side.

[0070] Here, by positioning one surface of the main body of the first cushion on the seat surface and one surface of the main body of the second cushion on the backrest above the first cushion, it is possible to make the cushion have a certain length even in the direction along the short side of the main body of the first cushion. Thus, for example, when placing cushions in a chair having a backrest and a seat surface, by placing the main body of the first cushion on the backrest side and the main body of the second cushion on the seat side, it is possible to support a wide range of body parts of the user, from the buttocks to the lower back and the back.

[0071] Furthermore, the first bulge of the first cushion, which is bent vertically on one side of the armrest and toward the other side of the main body of the first cushion, is positioned, and the second bulge of the first cushion, which is bent vertically on the other side of the armrest and toward the other side of the main body of the first cushion, is positioned; the first bulge of the second cushion, which is bent vertically on one side of the armrest and toward the other side of the main body of the second cushion, is positioned along the extension direction of the armrest and toward the other side of the main body of the second cushion, and the second bulge of the second cushion, which is bent vertically on the other side of the armrest and toward the other side of the main body of the second cushion, is positioned so that the left and right sides of the user's waist, both left and right sides of the back, and the outsides of both arms and both shoulders can be stably supported by each bulge. That is, the first and second bulges of the first cushion, located on the seat side, can support both the left and right sides of the user's lower back. The first and second bulges of the second cushion, located on the backrest side, can support both the left and right sides of the user's back, arms, and shoulders. In this way, the four bulges provide stable support, enveloping both the left and right sides of the user's body.

[0072] Furthermore, in order to achieve the above-mentioned object, the cushion arrangement structure of the present invention is a cushion arrangement structure in which the cushion described in claim 7 is arranged in a chair having a seat, a backrest, and armrests on the outside of both ends of the seat, wherein one surface of the first main body portion and the upper and lower connection portions are arranged along the backrest, and one surface of the second main body portion is arranged on the seat, and the third bulge portion bent along the vertical direction of one side of the armrest and toward the other surface of the second main body portion is positioned, and the fourth bulge portion bent along the vertical direction of the other side of the armrest and toward the other surface of the second main body portion is positioned, and the first bulge portion bent along the extending direction of one side of the armrest and toward the other surface of the first main body portion is positioned, and the second bulge portion bent along the extending direction of the other side of the armrest and toward the other surface of the first main body portion is positioned.

[0073] Here, by arranging one surface of the first main body and the vertical connecting portion along the backrest and one surface of the second main body on the seat, it is possible to make the cushion have a certain length even in the direction along the short side of the first main body. As a result, for example, when placing the cushion on a chair having a backrest and a seat, by arranging the first main body and the vertical connecting portion on the backrest side and the second main body on the seat side, it is possible to support a wide range of body parts, from the buttocks to the lower back and the back of the user.

[0074] Furthermore, the third bulge is positioned along the vertical direction on one side of the armrest and bent toward the other side of the second main body, and the fourth bulge is positioned along the vertical direction on the other side of the armrest and bent toward the other side of the second main body, and the first bulge is positioned along the extension direction on one side of the armrest and bent toward the other side of the first main body, and the second bulge is positioned along the extension direction on the other side of the armrest and bent toward the other side of the first main body, so that the left and right sides of the user's waist, both sides of the back, and the outer sides of both arms and both shoulders can be stably supported by each bulge. In other words, the left and right sides of the user's waist can be supported by the third and fourth bulges positioned on the seat side. In addition, the first and second bulges located on the backrest side can support the left and right sides of the user's back, arms, and shoulders. In this way, the four bulges can stably support the user, as if enveloping both sides of the body. [Effects of the Invention]

[0075] The cushion and cushion arrangement structure of the present invention can support and maintain the user's sitting posture or the posture of the back and head of the body, is easy to use, and can be applied to a wide range of applications, such as furniture chairs, wheelchairs, hairdressing chairs, hair washing chairs, car seats, and beds with reclining functions. [Brief explanation of the drawings]

[0076] [Figure 1] FIG. 1(a) is a schematic plan view of a cushion according to an embodiment of the present invention, and FIG. 1(b) is a schematic front view of the cushion shown in FIG. 1(a). [Figure 2] 1(a) is a schematic bottom view of the cushion shown in FIG. 1(a), and FIG. 1(b) is a schematic side view of the cushion shown in FIG. 1(a). [Figure 3]1(a) is a schematic perspective view of the cushion shown in FIG. 1(a) viewed from diagonally above, and FIG. 1(b) is a schematic perspective view showing the shape of the cushion shown in FIG. 1(a) with the main body wrapped around one of the bulging portions. [Figure 4] 1 is a schematic diagram showing the cushion arrangement structure of a furniture chair in the first embodiment. FIG. [Figure 5] 1 is a schematic diagram showing the arrangement of cushions in a wheelchair according to a first embodiment. FIG. [Figure 6] 1 is a schematic diagram showing the arrangement of cushions in a hair washing chair according to a first embodiment. FIG. [Figure 7] FIG. 10 is a schematic diagram showing the cushion arrangement structure of a hairdressing chair in a second embodiment. [Figure 8] FIG. 11 is a schematic diagram showing an example of cushion arrangement structure in a furniture chair according to the third embodiment. [Figure 9] FIG. 11 is a schematic diagram showing another example of the cushion arrangement structure of the furniture chair in the third embodiment. [Figure 10] FIG. 11 is a schematic diagram showing an example of cushion arrangement structure in a bed according to a third embodiment. [Figure 11] FIG. 10 is a schematic diagram showing another example of cushion arrangement structure in the bed according to the third embodiment. [Figure 12] FIG. 10 is a schematic diagram showing the arrangement of cushions in a bed according to a fourth embodiment. [Figure 13] FIG. 10 is a schematic diagram showing the arrangement of cushions in a bed according to a fifth embodiment. [Figure 14] FIG. 13 is a schematic diagram showing the arrangement of cushions in a car seat in a sixth embodiment. [Figure 15] 15 is a schematic diagram showing the cushion arrangement structure of FIG. 14 with a seat occupant sitting on the seat. FIG. [Figure 16] FIG. 13 is a schematic diagram showing the cushion arrangement structure of a furniture chair in the seventh embodiment. [Figure 17]FIG. 13 is a schematic diagram showing the cushion arrangement structure of a furniture chair in the eighth embodiment. [Figure 18] FIG. 13 is a schematic diagram showing the arrangement of cushions in a bed according to the ninth embodiment. [Figure 19] 13A and 13B are schematic diagrams showing the structure of a cushion in a tenth embodiment, where (a) is a schematic rear view and (b) is a schematic back view. [Figure 20] 11 is a schematic diagram showing the structure of the cushion in the eleventh embodiment, where (a) is a schematic oblique view showing the upper main body portion and the lower main body portion separated, and (b) is a schematic oblique view showing the upper main body portion and the lower main body portion connected. [Figure 21] FIG. 22 is a schematic diagram showing the structure of a cushion in the twelfth embodiment. [Figure 22] FIG. 22 is a schematic diagram showing the cushion arrangement structure of a furniture chair in the twelfth embodiment. [Figure 23] 13A and 13B are schematic diagrams showing the structure of a cushion in a thirteenth embodiment, in which (a) is a schematic plan view, and (b) is a schematic perspective view showing the folded shape when placed on a chair. [Figure 24] FIG. 23 is a schematic diagram showing the structure of a modified example of the cushion in the thirteenth embodiment. [Figure 25] 14A to 14C are schematic diagrams showing the structure of a cushion in a fourteenth embodiment, in which (a) is a schematic perspective view, (b) is a schematic back view, and (c) is a schematic front view. [Figure 26] 25(a) to 25(d) are schematic diagrams showing various shapes obtained by deforming the cushion shown in FIG. 25(a). [Figure 27] 23(a) and 23(b) are schematic diagrams showing the structure of a modified example of the cushion in the fourteenth embodiment. [Figure 28] 15A and 15B are schematic diagrams showing the structure of the cushion in the 15th embodiment, where (a) is a schematic diagram showing the cushion inner material and the expandable cushion material made of a cover body and urethane chip material, and (b) is a schematic enlarged diagram showing the cushion inner material and the expandable cushion material made of urethane chip material. [Figure 29] 15A and 15B are schematic diagrams showing the structure of the cushion in the 15th embodiment, where (a) is a schematic diagram showing the state before the expandable cushion material is inserted into the cover body, and (b) is a schematic diagram showing the state after the expandable cushion material is inserted into the cover body. [Figure 30] 15. Schematic diagrams showing the structure of a cushion in the 15th embodiment, where (a) is a schematic diagram showing a plurality of cushion inner materials with different amounts of cover body and urethane chip material, and (b) is a schematic diagram showing a plurality of cushion inner materials with different amounts of cover body and urethane chip material and a small-sized expandable cushion material. [Figure 31] 15A and 15B are schematic diagrams showing the structure of a modified cushion in the 15th embodiment, in which (a) is a schematic diagram showing the state before the main expansion / contraction cushion material is inserted into the cover body, (b) is a schematic diagram showing the state after the main expansion / contraction cushion material has been inserted into the cover body, and (c) is a schematic diagram showing the state before the plate-shaped urethane material is inserted into the cover body. [Figure 32] FIG. 22 is a schematic diagram showing the structure of a cushion in the sixteenth embodiment. [Figure 33] 17A and 17B are schematic diagrams showing the structure of a cushion in the seventeenth embodiment, where (a) is a schematic diagram showing the cover body, and (b) is a schematic diagram showing the partition seams and cylindrical space in the cover body. [Figure 34] 17A and 17B are schematic diagrams showing the structure of the cushion in the 17th embodiment, where (a) is a schematic diagram showing the state before the cushion inner material made of elongated urethane chip material is inserted into the cover body, and (b) is a schematic diagram showing the state after the cushion inner material made of elongated urethane chip material is inserted into the cover body. [Figure 35] 17A and 17B are schematic diagrams showing the structure of a modified cushion in the 17th embodiment, where (a) is a schematic diagram showing the state before the elongated expandable cushion material is inserted into the cover body, and (b) is a schematic diagram showing the state before the strip-shaped urethane material is inserted into the cover body. [Figure 36] FIG. 1 is a schematic exploded view showing the structure of a seating position support cushion of a conventional wheelchair. DETAILED DESCRIPTION OF THE INVENTION

[0077] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0078] Cushion A, which is an example of a cushion to which the present invention is applied, comprises a main body portion 1, a bulge portion 2, and a bulge portion 3 (see Figures 1(a), 1(b), 2(a), and 3(a)).

[0079] In the following description, with reference to FIG. 1(a), the direction of bulge 3 as viewed from bulge 2 will be referred to as right or rightward, and the direction of bulge 2 as viewed from bulge 3 will be referred to as left or leftward. With reference to FIG. 1(b), the upper side of the paper in the figure will be referred to as top or upward, and the lower side of the paper in the figure will be referred to as bottom or downward. The direction connecting left and right will be referred to as the left-right direction or horizontal direction. The direction connecting top and bottom will be referred to as the top-bottom direction or thickness direction.

[0080] Furthermore, with reference to FIG. 1(b), the upper surface of the cushion A on the paper surface will be referred to as the front surface or front surface side, and the lower surface on the paper surface will be referred to as the back surface or back surface side.

[0081] Here, the main body portion 1 is the portion that becomes the main body of the cushion 1, and is also a band-shaped member that connects the bulging portion 2 and the bulging portion 3.

[0082] The bulging portions 2 and 3 constitute the left and right end portions of the cushion 1 and are portions that are thicker than the main body portion 1.

[0083] As shown in FIG. 1(b), the bulging portion 2 and the bulging portion 3 are formed so that the cross section along the longitudinal direction of the cushion A has a substantially elliptical shape.

[0084] As shown in FIG. 1(b), the main body 1 is connected to the bulging portion 2 and the bulging portion 3 at a position approximately in the center in the up-down direction.

[0085] Moreover, the bulging portions 2 and 3 are configured so as to be bendable toward the main body 1 on both the front and back sides of the main body 1.

[0086] In addition, the bulging portion 2 or bulging portion 3 can be rotated toward the other bulging portion while wrapping the main body portion 1 around it, thereby forming a shape with a greater thickness.

[0087] For example, FIG. 3(b) shows a shape in which the main body 1 is wound around the bulge 3 and the bulge 3 is rotated toward the bulge 2.

[0088] 3(b), the thickness of the portion where the main body 1 is wrapped around the bulge 3 is greater than the thickness of the bulge 2. In this way, the cushion A can be formed with the main body 1 wrapped around one of the bulges, with a portion having a greater thickness, and with a shape having two thickness levels.

[0089] Here, it is not necessary for the cross-section of bulging portion 2 and bulging portion 3 along the longitudinal direction of cushion A to be formed in a substantially elliptical shape, and there are no particular limitations on the shape as long as they are formed to be thicker than main body portion 1. However, it is preferable that the cross-section of bulging portion 2 and bulging portion 3 along the longitudinal direction of cushion A be formed in a substantially elliptical shape, as this will give the two bulging portions a rounded, soft shape, and will increase the area of ​​the bulging portions that come into contact with the body, resulting in a good feel when used.

[0090] Furthermore, it is not necessary for the main body 1 to be connected to a position approximately in the center in the vertical direction of the bulging portions 2 and 3. However, as will be described later, when the bulging portions 2 and 3 are bent toward the front or back side, each bulging portion is easily bent evenly toward either the front or back side, making it easier to change the shape and position the cushion A, so it is preferable that the main body 1 be connected to a position approximately in the center in the vertical direction of the bulging portions 2 and 3.

[0091] The cushion A is constructed by placing a cushion inner material in a cover body. More specifically, the cushion A is constructed by placing the cushion inner material in the portions corresponding to the bulging portions 2 and 3 on the left and right end sides of the cover body.

[0092] That is, the main body 1 is made up of only a cover body that does not contain a cushion inner material, and the bulging portions 2 and 3 are made up of a cover body that contains a cushion inner material.

[0093] The cover body may be made of, for example, cloth or synthetic leather, and the cushion inner material may be made of, for example, hard urethane or soft urethane.

[0094] Here, cushion A does not necessarily have to be constructed by placing a cushion filling material in a cover body. For example, main body portion 1, bulge portion 2, and bulge portion 3 can be integrally formed from a material with appropriate softness suitable for a cushion. On the other hand, cushion filling material can also be contained not only in bulge portion 2 and bulge portion 3, but also in the portion of the cover body corresponding to main body portion 1.

[0095] Furthermore, the material of the cover that constitutes the cushion A is not particularly limited as long as it is a material suitable for cushions. For example, cotton, polyester, linen, synthetic leather, or other natural or artificial materials can be used as appropriate.

[0096] The material of the cushion filling that constitutes the cushion A is not particularly limited as long as it is a material suitable for cushion filling. For example, polyurethane, polyester cotton, bead material, feathers, etc. can be used as appropriate.

[0097] As shown in Fig. 2(a), a plurality of anti-slip portions 10 are provided on the back surface of the main body 1. The anti-slip portions 10 are semi-spherical members made of rubber, and a plurality of them are formed on the back surface of the main body 1 to prevent slipping when the cushion A is placed on the seat of a chair or the like.

[0098] Furthermore, as shown in Figure 2(b), the shape of cushion A when viewed from the side corresponds to the shape of bulging portion 3 (or bulging portion 2) when viewed from the side, and is an elliptical shape that is elongated in the width direction.

[0099] Next, a description will be given of the size of the cushion A. Note that the size of the cushion A shown here is merely an example, and in a cushion to which the present invention is applied, the size of each part can be set as appropriate.

[0100] First, in terms of the longitudinal direction of the cushion A, i.e., the length along the left-right direction, the length of the main body 1 (symbol X1) is 390 mm, and the lengths of the bulging portions 2 and 3 (symbol X2) are each 140 mm (see FIG. 1(a)). Also, the length along the short side of the cushion A, i.e., the width direction (symbol Y1), is 300 mm.

[0101] Furthermore, with regard to the size of the cushion A in the vertical direction, i.e., the thickness direction, the thickness of the main body 1 (symbol Z1) is 10 mm, and the thickness of the bulge 2 and the bulge 3 (symbol Z2) is 80 mm (see Figure 1(b)).

[0102] Here, the length of cushion A in the left-right direction is not necessarily limited to the above length. However, as will be described later, from the viewpoint of easily folding bulging portions 2 and 3 onto the front or back side of main body 1 to form a thicker cushion shape, it is preferable that the length of main body 1 in the left-right direction be at least twice the length of bulging portions 2 and 3. Furthermore, from the viewpoint of a good balance between the lengths of main body 1 and bulging portions 2 and 3 and making it easier to place cushion A on the back or seat of a chair, it is preferable that the length of main body 1 be no more than three times the length of bulging portions 2 and 3.

[0103] Furthermore, the length in the left-right direction and the thickness in the up-down direction of the main body 1 are not necessarily limited to the above sizes. However, since this makes it easier to place the cushion A on the seat or back of a chair or wheelchair with armrests on both sides of the seat, the length of the main body 1 in the left-right direction is preferably, for example, about 280 mm to 900 mm, and more preferably about 280 mm to 500 mm. Furthermore, the thickness of the main body 1 in the up-down direction is preferably, for example, about 4 mm to 12 mm.

[0104] Furthermore, the left-right length and up-down thickness of bulging portions 2 and 3 are not necessarily limited to the above sizes. However, when cushion A is placed on the seat or back of a chair or wheelchair with armrests on both sides of the seat, bulging portions 2 and 3 are positioned between the user's body (lower back) and the armrests, making it easier to support the body. Therefore, the left-right length of bulging portions 2 and 3 is preferably about 120 mm to 300 mm, and more preferably about 120 mm to 160 mm, for example. Furthermore, the up-down thickness of bulging portions 2 and 3 is preferably about 60 mm to 160 mm, for example.

[0105] Furthermore, it is preferable that the thickness of the bulging portions 2 and 3 be within a range of 5 to 40 times the thickness of the main body portion 1 in the vertical direction.

[0106] Furthermore, the length of the cushion A in the width direction is not necessarily limited to the above size. However, in terms of placing the main body 1 of the cushion A on the seat of a chair or wheelchair, it is preferable that the length of the cushion A in the width direction be approximately 300 mm to 420 mm.

[0107] Next, an example of a cushion arrangement structure to which the present invention is applied will be described below.

[0108] [First embodiment] In the first embodiment of the present invention, cushion A is arranged along the back and armrests of a chair. As shown in FIG. 4, cushion A is arranged on chair 4, which has backrest 40 and two armrests 41 and 42. Chair 4 is a piece of furniture. The cushion arrangement structure of the first embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified examples.

[0109] The back surface of main body 1 of cushion A abuts against the surface of backrest 40 of chair 4. In addition, bulging portion 2 of cushion A is arranged along armrest 41 and bent toward the surface of main body 1. In addition, bulging portion 3 of cushion A is arranged along armrest 42 and bent toward the surface of main body 1.

[0110] That is, bulging portions 2 and 3 are bent at approximately 90 degrees relative to main body 1, and are arranged along each of two armrests 41 and 42 of chair 4. Furthermore, bulging portions 2 and 3 can be easily bent, making it easy to change the overall shape of cushion A.

[0111] Here, the bulge portions 2 and 3 do not necessarily need to be bent at approximately 90 degrees relative to the main body portion 1, but the cushion A can be positioned by bending the bulge portions 2 and 3 to fit the shape of a chair with two armrests, i.e., to fit the angle of the armrests.

[0112] In addition, the anti-slip portion 10 on the underside of the main body 1 abuts against the surface of the backrest 40 of the chair 4, making it difficult for the main body 1 to shift position relative to the backrest 40.

[0113] In the arrangement structure of cushion A shown in Figure 4, cushion A contacts the lumbar region of a person sitting on chair 4 from the left and right sides to the rear (back side), thereby supporting and maintaining the sitting posture of the person.

[0114] More specifically, the left and right sides of the lower back are firmly supported by bulge 2 or bulge 3, which is located between the lower back and armrest 41 or 42. Because bulge 2 and bulge 3 are formed to be thick, they fill the space between the lower back and armrest 41 or 42, and even when the seated person leans to the left or right and weight is applied, bulge 2 or bulge 3 can adequately support the sides of the seated person's lower back.

[0115] Furthermore, the arrangement structure in the first embodiment can be adopted not only for furniture chairs such as chair 4, but also for other types of chairs.

[0116] For example, as shown in Fig. 5, the cushion A can also be applied to a wheelchair 5. The wheelchair 5 has a backrest 50 and two armrests 51 and 52, and the cushion A can be arranged in the same manner as the chair 4.

[0117] 6, for example, a cushion A can be placed on a hair washing chair 6. The hair washing chair 6 has a backrest 60 and two armrests 61 and 62. The backrest 60 of the hair washing chair 6 has a reclining function.

[0118] As shown in FIG. 6, the backrest 60 of the hair washing chair 6 can be tilted toward the hair washing table, and the cushion A can be placed in this state.

[0119] In the hair washing chair 6, the seated person also leans backward in accordance with the inclination of the backrest 60, but even in such a position, the cushion A abuts the seated person's waist from the left and right sides to the rear, and supports and maintains the seated position of the seated person.

[0120] As described above, in the first embodiment of the present invention, cushion A is arranged along the back and armrests of the chair, and cushion A abuts the occupant's lower back from the left and right sides to the rear, supporting and maintaining the seated posture of the occupant. Furthermore, by giving cushion A a deformed shape, a highly stable arrangement structure can be achieved.

[0121] [Second embodiment] The second embodiment of the present invention differs from the first embodiment in that cushion A is arranged along the seat and armrests of a chair, and main body 1 is arranged on the seat of the chair. Note that the cushion arrangement structure of the second embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0122] As shown in Fig. 7, a cushion A is placed on a hairdressing chair 7 having a backrest 70, a seat 71, two armrests 72 and an armrest 73. The backrest 70 of the hairdressing chair 7 has a reclining function.

[0123] As shown in Figure 7, the back surface of main body 1 of cushion A abuts against the surface of seat 71 of chair 7. In addition, bulging portion 2 of cushion A is arranged along armrest 72 and bent toward the surface of main body 1. In addition, bulging portion 3 of cushion A is arranged along armrest 73 and bent toward the surface of main body 1.

[0124] That is, bulging portions 2 and 3 are bent at approximately 90 degrees relative to main body portion 1 disposed on seat surface 71, and bulging portions 2 and 3 are disposed along each of two armrests 72 and 73 of chair 4. Furthermore, bulging portions 2 and 3 can be easily bent, making it easy to change the overall shape of cushion A.

[0125] Here, the bulge portions 2 and 3 do not necessarily need to be bent at approximately 90 degrees relative to the main body portion 1, but the cushion A can be positioned by bending the bulge portions 2 and 3 to fit the shape of a chair with two armrests, i.e., to fit the angle of the armrests.

[0126] Furthermore, the anti-slip portion 10 on the underside of the main body 1 abuts against the surface of the seat 71 of the chair 7, making it difficult for the main body 1 to shift position relative to the seat 71.

[0127] In the arrangement of the cushion A shown in FIG. 7, the cushion A abuts against the left and right sides of the buttocks and lower back of an occupant sitting on the chair 7, and can support and maintain the sitting posture of the occupant.

[0128] More specifically, the main body 1 of the cushion A supports the buttocks of a seated person on the seat surface 71 of the chair 7, providing a comfortable seat surface.

[0129] Additionally, the left and right sides of the lower back are firmly supported by bulge 2 or bulge 3, which is located between the lower back and armrest 72 or armrest 72. Because bulge 2 and bulge 3 are formed to be thick, they fill the space between the lower back and armrest 72 or armrest 73, and can also provide sufficient support for the sides of the lower back of the seated person when the seated person leans to the left or right and weight is applied.

[0130] Furthermore, the arrangement structure in the second embodiment can be adopted not only for hairdressing chairs such as chair 7, but also for a wide range of other types of chairs, such as furniture chairs, wheelchairs, hair washing chairs, and car seats.

[0131] As described above, in the second embodiment of the present invention, cushion A is arranged along the seat and armrests of the chair, and cushion A abuts against the left and right sides of the buttocks and lower back of the seated person, thereby supporting and maintaining the seated posture of the seated person. In addition, by giving cushion A a deformed shape, an arrangement structure with excellent stability can be achieved.

[0132] [Third embodiment] The third embodiment of the present invention is an embodiment in which cushion A is hung on the back of a chair having a seat and a backrest. The cushion arrangement structure of the third embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified examples.

[0133] For example, Figs. 8 and 9 show an arrangement structure in which a cushion A is placed on the back of a chair.

[0134] 8 and 9 has a backrest 80 and a seat 81. The chair 8 is a piece of furniture.

[0135] 8, main body 1 of cushion A is hooked onto the upper end of backrest 80 of chair 8. Furthermore, via main body 1, bulge 2 is located on the front side of backrest 80, and bulge 3 is located on the rear side of backrest 80.

[0136] The back surface of the main body 1 abuts against the surface of the backrest 80 of the chair 8. The bulge 2 is disposed on the upper side of the backrest 80.

[0137] Furthermore, since the bulge 3 is positioned on the back side of the backrest 80, it is possible to maintain a balance with the bulge 2 positioned on the front side of the backrest 80, and to keep the main body 1 hooked on the upper end of the backrest 10.

[0138] The arrangement of cushion A shown in Fig. 8 is such that, when a person sits in chair 8, bulging portion 2 is likely to come into contact with the person's back, particularly the upper part of the back, shoulder blades, spine, etc. With this arrangement, for example, when a person with a hunched back or hunched posture sits in chair 8, bulging portion 2 comes into contact with the upper part of the person's rounded back, supporting the back and improving the comfort of the sitting posture.

[0139] 9, similarly to FIG. 8, main body 1 of cushion A is hooked onto the upper end of backrest 80 of chair 8. Furthermore, via main body 1, bulge 2 is located on the front side of backrest 80, and bulge 3 is located on the rear side of backrest 80.

[0140] 9, the rear surface of the main body 1 abuts against the surface of the backrest 80 of the chair 8. Also, unlike in FIG. 8, the bulge 2 is arranged on the lower side of the backrest 80 in FIG.

[0141] Furthermore, since the bulge 3 is positioned on the back side of the backrest 80, it is possible to maintain a balance with the bulge 2 positioned on the front side of the backrest 80, and to keep the main body 1 hooked on the upper end of the backrest 80.

[0142] The cushion A's arrangement shown in Figure 9 is designed so that when a person sits in chair 8, bulging portion 2 easily comes into contact with the person's back or lower back, particularly from the lower back to the rear of the lower back. With this arrangement, for example, when a person with lower back pain sits in chair 8, bulging portion 2 comes into contact with the person's back from the lower back to the rear of the lower back, supporting the lower back and improving the comfort of the sitting posture.

[0143] In the arrangement of the cushion A shown in Figs. 8 and 9, the height position of the bulge 2 on the surface side of the backrest 80 can be changed as appropriate to suit the physique and posture of the seated person.

[0144] As a third embodiment of the present invention, a bed having a reclining backrest will be described, in which a cushion A is hung on the backrest.

[0145] 10 and 11 has a backrest 90. The backrest 90 also has a reclining function.

[0146] 10, the main body 1 of the cushion A is hooked onto the upper end of the backrest 90 of the bed 9. The backrest 90 is tilted so that the user's line of sight is directed diagonally upward.

[0147] Furthermore, the bulge 2 is located on the front surface side of the backrest 90 via the main body 1. Furthermore, although not shown, the bulge 3 is located on the rear surface side of the backrest 90.

[0148] The rear surface of the main body 1 abuts against the surface of the backrest 90 of the bed 9. The bulge 2 is disposed on the backrest 90 at a position corresponding to the cervical vertebrae P1 of the user.

[0149] Furthermore, since the bulge 3 is positioned on the back side of the backrest 90, it is possible to maintain a balance with the bulge 2 positioned on the front side of the backrest 90, and to keep the main body 1 hooked on the upper end of the backrest 90.

[0150] 10, the cushion A is arranged so that the bulge 2 can easily come into contact with the cervical vertebrae P1 of the user when the user lies down with his or her back against the backrest 90 of the bed 9. In this arrangement, the bulge 2 supports the cervical vertebrae P1 of the user, making it easier for the user to assume a posture in which, for example, the chin P2 of the user is raised diagonally upward.

[0151] 10, the user's chin P2 is raised, which makes it easier to provide various services, such as meal assistance, dental care, oral care, grooming such as shaving, and beauty services, on the bed 9. That is, the user supported by the cushion A maintains a stable posture even with the chin P2 raised, and can receive services such as meal assistance in a comfortable position.

[0152] More specifically, for example, it will be easier for bedridden people or patients who are unable to get up to adjust the position and angle of their jaw when receiving services such as meal assistance, dental treatment, oral care, tooth brushing, shaving, and other grooming services.

[0153] This allows the user of the cushion A to enjoy various services in a comfortable position. In addition, providers of various services can provide various services safely because the head of the user of the cushion A is stabilized.

[0154] 11, similarly to Fig. 10, the main body 1 of the cushion A is hooked onto the upper end of the backrest 90 of the bed 9. Also in Fig. 11, the backrest 90 is tilted.

[0155] Furthermore, via the main body 1, the bulge 2 is located on the front surface side of the backrest 90, and the bulge 3 is located in a position from the upper end of the backrest 80 to the rear surface side. Furthermore, the rear surface of the main body 1 abuts against the surface of the backrest 90 of the bed 9.

[0156] In the arrangement of cushion A shown in Figure 11, the user is sitting with the upper half of their body upright on the bed 9, and the bulge 2 is designed to easily come into contact with the upper part P3 of the user's back. In this arrangement, the bulge 2 supports the upper part P3 of the user's back, making it easier for the user to look straight ahead.

[0157] 11, the arrangement of cushion A allows the user to sit on bed 9 and maintain a posture with their eyes facing straight ahead, making it easier to provide various services, such as meal assistance, dental care, oral care, grooming such as shaving, and beauty services, on bed 9. That is, when a user is supported on cushion A, the bulge 2 supports the upper part P3 of the user's back, stabilizing their posture with their eyes facing straight ahead, allowing them to receive services such as meal assistance in a comfortable posture.

[0158] More specifically, for example, when a bedridden person or a patient who is unable to get up receives assistance with meals, dental treatment, oral care, teeth brushing, grooming such as shaving, or hair and beauty services such as a haircut, it is necessary to raise the back of the bed and maintain a seated position with the occupant's back slightly away from the bed, so that the eye level of the occupant and the eye level of the caregiver or other service provider are at the same level.

[0159] Generally, two service providers work together. For example, when a barber or hairdresser is cutting the hair of a bedridden person in bed, one person is responsible for supporting the person's back and head, while the other is responsible for cutting the hair. If there is only one service provider, it would be difficult to cut the back of the head from the standpoint of ensuring safety.

[0160] In such a case, by using the cushion A in the arrangement structure shown in Figure 11, the bulge 2 supports the upper part P3 of the back of the user of the cushion A, stabilizing the posture with the eyes facing straight ahead, and various services can be provided to the user of the cushion A even if there is only one service provider.

[0161] By arranging the cushion A as shown in Figure 11, for example, the space between the bed and the head of the user of the cushion A can be widened to maintain space, making it easier for barbers, hairdressers, etc. to cut the back of the head.

[0162] In addition, by using the cushion A arrangement structure shown in Figure 11, it becomes easier for the user of cushion A to maintain a sitting posture with the upper body upright, and their line of sight is raised, making it easier to provide assistance with meals, oral care, teeth brushing, and other grooming tasks, which also helps prevent aspiration.

[0163] As described above, in the third embodiment of the present invention, in a chair having a seat and a backrest or a bed with a reclining function, cushion A can be hung on the backrest to stabilize the sitting posture of a seated person or the posture of a user on the bed. Also, by changing the position of the bulge that supports the user, a highly stable arrangement structure can be achieved.

[0164] [Fourth embodiment] The fourth embodiment of the present invention describes an aspect in which a cushion A having a main body wrapped around one of the bulging portions is placed in a bed having a reclining backrest. The cushion placement structure of the fourth embodiment of the present invention can also be applied to the cushion placement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0165] FIG. 12 shows a state in which a user rests his / her back against the backrest 90 of the bed 9 described above, with the cushion A placed behind the head.

[0166] The cushion A shown in Fig. 12 is arranged in the shape shown in Fig. 3(b). That is, the cushion A has a shape in which the main body 1 is wrapped around the bulge 3, and the bulge 3 is rotated toward the bulge 2.

[0167] In this cushion A, the thickness of the portion where the main body 1 is wrapped around the bulge 3 is greater than the thickness of the bulge 2, and the cushion A as a whole has a shape with two levels of thickness.

[0168] As shown in FIG. 12, the bulge 2 is positioned at a position corresponding to the user's cervical vertebrae P1, and the portion where the main body 1 is wrapped around the bulge 3 is positioned at a position corresponding to the user's back of the head P4.

[0169] In this way, by placing the cushion A, which has two thicknesses, on the back of the head P4 of the user like a pillow, it is possible to provide sufficient support for the area from the cervical vertebrae P1 to the back of the head P4 with the cushion A. In addition, because the portion where the main body 1 is wrapped around the bulge 3 has a large thickness, it can firmly support the relatively heavy head from the lower rear and stabilize the position of the head.

[0170] Furthermore, the structure is such that the occipital region P4 is supported by the portion of the main body 1 wrapped around the bulge 3, and the bulge 2 supports the user's cervical vertebrae P1, thereby maintaining and stabilizing the user's posture while reducing the burden on the user's neck.

[0171] Furthermore, in the arrangement structure of cushion A shown in Fig. 12, similar to the state in Fig. 10, the user supported by cushion A has a stable posture and can receive services such as meal assistance in a comfortable position. In addition, it becomes easier to adjust the position and angle of the user's chin, allowing the user to receive various services in a comfortable position. Furthermore, providers of various services can provide various services safely because the head of the user of cushion A is stabilized.

[0172] Although the example given here is use in a bed with a reclining backrest, the use situation is not limited to this, and for example, a similar cushion A arrangement structure can also be used in a chair with a reclining backrest.

[0173] [Fifth embodiment] The fifth embodiment of the present invention describes an aspect in which a cushion A is placed in a bed with a reclining backrest, with both bulges facing the main body. The cushion placement structure of the fifth embodiment of the present invention can also be applied to the cushion placement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0174] FIG. 13 shows a state in which a user rests his / her back against the backrest 90 of the bed 9 described above, with the cushion A placed on the upper part of the back and behind the shoulders.

[0175] 13, both the bulge 2 and the bulge 3 are bent toward the front surface of the main body 1. The back surface of the main body 1 abuts against the surface of the backrest 90.

[0176] 13, bulging portions 2 and 3 are positioned at a position corresponding to upper part P3 of the user's back. In addition, the thickness of main body 1 is added to the thickness of bulging portions 2 and 3, making them thicker than the thickness of bulging portions 2 and 3 alone.

[0177] In this way, by placing cushion A, in which both bulge portion 2 and bulge portion 3 are folded toward the surface of main body portion 1, at the position of upper part P3 of the user's back, it is possible to more stably support the user sitting with the upper body upright on bed 9. In addition, when sitting, the user's gaze is directed straight ahead.

[0178] Furthermore, since both the bulging portion 2 and the bulging portion 3 support the left and right sides of the upper part P3 of the user's back, lateral swaying of the user's body can be further suppressed.

[0179] As a result, similar to the arrangement structure of cushion A shown in Fig. 11 above, it becomes easier to provide various services such as meal assistance, dental care, oral care, grooming such as shaving, and hair and beauty services on bed 9. That is, when a user is supported on cushion A, the upper part P3 of the user's back is supported by bulging parts 2 and 3, and the user's gaze is stabilized with the eyes facing straight ahead, allowing the user to receive services such as meal assistance in a comfortable position.

[0180] Furthermore, the thickness of the main body 1 is added to the bulging portions 2 and 3, which not only improves stability during use but also makes the feel during use even better. Also, the volume of the cushion A that fills the space between the backrest 90 of the bed 9 and the user's back is larger than the volume of the cushion A shown in Figure 11, making it even easier for the user to raise their upper body relative to the bed 9.

[0181] Although the example given here is use in a bed with a reclining backrest, the use situation is not limited to this, and for example, a similar cushion A arrangement structure can also be used in a chair with a reclining backrest.

[0182] [Sixth embodiment] The sixth embodiment of the present invention describes a cushion A that is placed in a car seat with one armrest, with one bulge folded toward the back side of the main body and the other bulge folded toward the front side of the main body and along the armrest. Note that the cushion placement structure of the sixth embodiment of the present invention can also be applied to the cushion placement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0183] 14 and 15 show an automobile seat 100. The seat 100 has a backrest 101 and one armrest 102 provided inside the vehicle. Furthermore, no armrest is provided on the door side of the seat 100 (not shown). Furthermore, the seat 100 is a driver's seat.

[0184] 14, the cushion A has a bulge 2 bent toward the rear surface of the main body 1 and placed in contact with the backrest 101. The bulge 3 is also bent along the armrest 102 and toward the front surface of the main body 1.

[0185] That is, the bulge 3 is bent at approximately 90 degrees relative to the main body 1 and is arranged along the armrest 102 of the seat 100. Furthermore, the bulge 2 and the bulge 3 can be easily bent, and the overall shape of the cushion A can be easily changed.

[0186] As shown in FIG. 14, the thickness of the bulging portion 2 is increased by the thickness of the main body portion 1, and the thickness is greater than the thickness of the bulging portion 2 and the bulging portion 3 alone.

[0187] In this way, by placing a cushion A in which the bulge 2 is bent toward the back side of the main body 1 and the bulge 3 is bent along the armrest 102 and toward the front side of the main body 1 in the driver's seat 100 of a car, the armpits and sides of the waist of the occupant can be sufficiently supported.

[0188] That is, for example, by placing a cushion A having the shape shown in FIG. 14 in the driver's seat of an automobile, it is possible to firmly support both sides of the occupant's lower back and the area extending from both sides of the lower back to the rear, thereby maintaining the driver's posture when driving for long periods of time (see FIG. 15).

[0189] As a result, bulges 2 and 3 support the driver's lower back from both sides, significantly reducing the load on the lower back. Because it is difficult for a driver to move their body significantly while driving and to change their posture significantly, cushion A maintains and supports the driver's posture, which is highly effective in reducing the burden on the user.

[0190] Although use in a car seat has been given as an example here, the use situation is not limited to this, and for example, a similar cushion A arrangement structure can also be used in a chair provided with one armrest.

[0191] [Seventh embodiment] The seventh embodiment of the present invention is an embodiment in which cushion A is combined with a cushion of a general shape and arranged along the back and armrests of a chair. The seventh embodiment differs from the first embodiment shown in Fig. 4 above in that cushion A is combined with a cushion of a general shape. The cushion arrangement structure of the seventh embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0192] Fig. 16 shows chair 4 having the above-mentioned backrest 40 and two armrests 41 and 42. Cushion A is placed on chair 4, and cushion B of a general shape is placed on top of the surface of main body 1 of cushion A. Cushion B is a general-shaped back cushion with a roughly rectangular outer shape.

[0193] As shown in Figure 16, by placing cushion B on the surface of main body 1 of cushion A, the thickness of the part that contacts the back of the occupant's waist is greater than the thickness of main body 1 alone. This makes the back of the occupant's waist feel even better when used.

[0194] As shown in this seventh embodiment, the cushion A can be arranged in combination with a cushion of a general shape.

[0195] [Eighth embodiment] The eighth embodiment of the present invention is an embodiment in which two cushions A are combined and arranged along the back and armrests of a chair. The eighth embodiment is an embodiment in which another cushion A is arranged on top of the cushion A arranged on the chair in the first embodiment shown in FIG. 4 above. The cushion arrangement structure of the eighth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0196] 17 shows a chair 4 having the above-mentioned backrest 40 and two armrests 41 and 42. As in the first embodiment, a first cushion A1 is placed on the chair 4, and a second cushion A2 is placed by hooking the main body 1 of the second cushion A2 onto the upper part of the backrest 40 and the upper edge of the main body 1 of the cushion A1.

[0197] 17, the bulge 2 of the cushion A2 is disposed on the upper side of the surface of the main body 1 of the cushion A1. In FIG. 17, a dotted pattern is applied only to the cushion A2 to make it easier to distinguish between the cushion A1 and the cushion A2.

[0198] As shown in Figure 17, by placing cushion A2 on the surface side of main body 1 of cushion A1, both sides of the occupant's lower back are supported by bulging portions 2 and 3 of cushion A1, and the upper part of the occupant's back is firmly supported by bulging portion 2 of cushion A2.

[0199] When a person with a hunchback or stoop sits on the chair 4, the bulging part 2 of this cushion A2 comes into contact with the upper part of the rounded back, supporting the back and improving the comfort of the sitting posture.

[0200] As shown in the eighth embodiment, it is also possible to arrange two cushions, namely, cushion A1 and cushion A2, in combination on a chair.

[0201] [Ninth embodiment] The ninth embodiment of the present invention is an embodiment in which two cushions A are combined and placed on a bed having a reclining backrest. In the ninth embodiment, a cushion A is placed on top of the cushion A placed on the bed in the third embodiment shown in FIG. 10, and another cushion A is placed on top of the cushion A in the shape of the fifth embodiment shown in FIG. 13. The cushion placement structure of the ninth embodiment of the present invention can also be applied to the cushion placement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0202] 18 shows a bed 9 having the above-described backrest 90. As in the third embodiment, a first cushion A1 is placed on the bed 9, and a second cushion A2 is placed above the main body 1 and bulge 2 of the cushion A1.

[0203] As shown in FIG. 18, the bulging portion 2 and the bulging portion 3 of the cushion A2 are bent toward the surface side of the main body 1 thereof.

[0204] As shown in Figure 18, cushion A2, which has bulging portions 2 and 3 bent toward the surface side of main body 1, is placed on top of main body 1 and bulging portion 2 of cushion A1, so that the user's cervical vertebrae P1 and occipital region P4 can be firmly supported by bulging portion 2 of cushion A1 and bulging portions 2 and 3 of cushion A2.

[0205] The arrangement of the two cushions A1 and A2 shown in FIG. 18 can further stabilize the area above the user's shoulders, particularly the cervical vertebrae P1 and the back of the head P4, thereby maintaining the user's posture.

[0206] Furthermore, at the position of the cervical vertebrae P1 and the occipital region P4, the bulging portion 2 of the cushion A1, the main body portion 1 of the cushion A2, and the bulging portion 2 or bulging portion 3 of the cushion A2 overlap to form a portion with a large thickness, which makes the feel of use when placed against the user's body even better.

[0207] In addition, the position of the back of the head P4 of the user is raised, making it easier to raise the position of the user's line of sight, and lateral shaking of the back of the head P4 can be suppressed via the bulging portions 2 and 3 of the cushion A2.

[0208] As shown in this ninth embodiment, it is also possible to arrange two cushions, A1 and A2, in combination with respect to a bed having a reclining backrest.

[0209] Next, an example of a cushion or cushion arrangement structure to which the present invention is applied will be described. [Tenth embodiment] The tenth embodiment of the present invention differs from the cushion A described above in that it has a loop through which a string, belt, or the like can be passed to secure the cushion. The structure of the cushion of the tenth embodiment of the present invention can also be applied to the structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0210] In the cushion C according to the tenth embodiment of the present invention, two loop portions 11 are provided on each of the upper and lower edges of the main body portion 1. Four loop portions 12 are also provided on the back surface of the main body portion 1 (see FIGS. 19(a) and 19(b)).

[0211] By passing a string or belt through this loop portion 11 or loop portion 12 and tying the string or belt to the back or seat of a chair or bed, it is possible to firmly secure the main body portion 1 to the chair or bed. This makes it difficult for the cushion to slip from its position. It also allows for greater freedom in the positioning of the cushion.

[0212] [Eleventh embodiment] In the eleventh embodiment of the present invention, the main body can be separated to adjust the longitudinal length of the cushion. The structure of the cushion in the eleventh embodiment of the present invention can also be applied to the structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0213] In a cushion D according to an eleventh embodiment of the present invention, the main body 13 is composed of two parts, an upper main body 130 and a lower main body 131, which are separable (see FIG. 20(a)). Furthermore, hook-and-loop fasteners 132 are provided on the back surface of the upper main body 130 and on the front surface of the lower main body 131. The hook-and-loop fastener on the back surface of the upper main body 130 is not shown in the drawing.

[0214] In addition, in the cushion D, a bulge 20 is formed adjacent to the left edge of the upper main body portion 130. In addition, a bulge 30 is formed adjacent to the right edge of the lower main body portion 131.

[0215] In this cushion D, the longitudinal length of the main body 13 can be adjusted to a desired length by changing the engagement positions of the hook-and-loop fasteners 132 formed on the back surface of the upper main body 130 and the surface of the lower main body 131. This allows the size of the cushion to be changed with even greater freedom to suit the size and shape of the chair and the desired part of the user's body that it will be placed against.

[0216] [Twelfth embodiment] The twelfth embodiment of the present invention is an embodiment in which two cushions A are combined and placed in a chair having a seat, a backrest, and two armrests. The cushion arrangement structure of the twelfth embodiment of the present invention can also be applied to the cushion arrangement structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0217] 21 and 22, in this embodiment, two cushions, A1 and A2, are used. The cushions A1 and A2 have the same structure as the cushion A described above.

[0218] In this embodiment, the main body 1 of the cushion A1 is arranged along the backrest 43, and the main body 1 of the cushion A2 is arranged along the seat surface 44 (see FIG. 22).

[0219] Moreover, bulge 2 of cushion A2 is arranged so as to bend upward along armrest 45 and toward the surface side of main body 1. Moreover, bulge 3 of cushion A2 is arranged so as to bend upward along armrest 46 and toward the surface side of main body 1.

[0220] Moreover, bulging portion 2 of cushion A1 is arranged along armrest 41 and bent toward the surface of main body 1. Moreover, bulging portion 3 of cushion A1 is arranged along armrest 42 and bent toward the surface of main body 1.

[0221] This arrangement allows the main body 1 of each cushion A1 and cushion A2 to support a wide range of body parts, including the user's buttocks, lower back, and back. Furthermore, the bulging portions 2 and 3 of cushion A2 can support both the left and right sides of the user's lower back. The bulging portions 2 and 3 of cushion A1 can support both the left and right sides of the user's back, as well as the outside of both arms and shoulders.

[0222] This embodiment is easily adopted in chairs with wide backrests and seats, and the two cushions A1 and A2 support the user's body over a wide area, allowing the user to sit comfortably in the chair.

[0223] [Thirteenth embodiment] The thirteenth embodiment of the present invention is a cushion E having a shape shown in Figures 23(a) and 23(b). Cushion E has a structure in which two of the above-mentioned cushions A are connected in the vertical direction of the main body. Note that the structure of the cushion of the thirteenth embodiment of the present invention can also be applied to the structures of cushions L, G, H, I, J, K, and M, which will be described later, and their modified cushions.

[0224] 23(a), the cushion E has a main body portion 14. The main body portion 14 is composed of an upper main body portion 140, a vertical connecting portion 141, and a lower main body portion 142. The upper main body portion 140, the vertical connecting portion 141, and the lower main body portion 142 are formed only by an integrated cover member.

[0225] In addition, bulging portions 21 and 31 are formed adjacent to both left and right edge portions of upper main body portion 140. In addition, bulging portions 22 and 32 are formed adjacent to both left and right edge portions of lower main body portion 131. In addition, the four bulging portions are formed by placing cushion inner material inside the cover body that constitutes main body portion 14.

[0226] The cushion E having such a shape can be placed on a chair having a seat, a backrest, and two armrests, similar to the twelfth embodiment described above. In this case, as shown in Fig. 23(b), the cushion E can be placed on the chair with the upper and lower connecting parts 141 bent at the boundary so that the lower main body part 142 is placed on the seat side and the upper main body part is placed on the backrest side.

[0227] As another aspect of this embodiment, cushion F can be provided as shown in Fig. 24. Unlike cushion E, cushion F has an upper main body portion 150 and a lower main body portion 152 that constitute main body portion 15, each of which has a cushion inner material placed inside the cover, resulting in a thicker shape.

[0228] Furthermore, in cushion F, upper main body portion 150 and lower main body portion 152 are connected by vertical connection portion 151, which is formed only by the cover body. As in cushion F, upper main body portion 150 and lower main body portion 152 can also be made thicker.

[0229] [Fourteenth embodiment] The fourteenth embodiment of the present invention is a cushion L that is inflated using air. As shown in Figures 25(a) to 25(c), the cushion L has a main body portion 1a, an inflated portion 2a, and an inflated portion 3a.

[0230] Furthermore, as shown in Figure 25(b), the main body portion 1a, the inflated portion 2a and the inflated portion 3a of the cushion L have injection ports 100a, 20a and 30a formed on the back side, respectively, and air can be injected into each of them to adjust the degree of inflation and create a desired shape.

[0231] 25(a) to 25(c), the main body 1a and the bulging portion 2a, and the main body 1a and the bulging portion 3a are connected by connecting portions 10a, respectively. These connecting portions 10a connect the main body 1a and the bulging portion 2a or the bulging portion 3a, and also serve to separate the respective components.

[0232] That is, by forming each connection portion 10a, injection port 100a, injection port 20a, and injection port 30a, the main body portion 1a, the bulging portion 2a, and the bulging portion 3a can be individually inflated. Also, the degree of inflation of each member can be made different.

[0233] Furthermore, the main body 1a, the bulging portions 2a, 3a, and the connecting portions 10a are made of vinyl chloride resin. As shown in Fig. 25(c), when the main body 1a, the bulging portions 2a, and 3a are expanded significantly, the expansion of the bulging portions 2a and 3a becomes larger than the expansion of the main body 1a.

[0234] The main body 1a is also formed with four internal partitions 11a (see FIGS. 25(a) to 25(c)). These internal partitions 11a are formed by welding sheet-like partition materials (not shown) made of vinyl chloride resin to the top and bottom surfaces of the inside of the main body 1a along the short side (longitudinal) direction of the main body 1a. In this case, the sheet-like partition material is arranged so that the width direction of the sheet-like partition material coincides with the thickness direction of the main body 1a. By providing these sheet-like partition materials, it is possible to maintain a constant thickness even at the positions of the internal partitions 11a when air is injected into the main body 1a to divide it into multiple inflatable compartments, as will be described later.

[0235] More specifically, the internal partition 11a has a gap between the upper end or the lower end of the main body 1a in the vertical direction in Fig. 25(a) inside the main body 1a, allowing air to pass through the gap, and even with the internal partition 11a, air can be distributed throughout the entire interior of the main body 1a.

[0236] By providing these four internal dividers 11a, when the main body 1a is inflated with air, it can be inflated into multiple inflated sections extending left and right, rather than into one large inflated shape. This shape makes it easier to fit the main body 1a around the user's waist and neck, and increases the number of areas of the main body 1a that come into contact with the body, allowing for more stable support of body parts.

[0237] Furthermore, as described above, the internal partition 11a does not have a structure that completely separates the inside of the main body portion 1a, and by simply providing one inlet 100a for the main body portion 1a, it is possible to allow air to circulate throughout the inside of the main body portion 1a.

[0238] Here, it is not necessary that the main body portion 1a, the inflatable portion 2a, and the inflatable portion 3a can be adjusted by injecting air thereinto. For example, it is also possible to employ an embodiment in which the degree of expansion of the main body portion 1a, the inflatable portion 2a, and the inflatable portion 3a can be adjusted by injecting water instead of air thereinto. However, if air is used, the degree of expansion can be easily adjusted by the simple task of letting air in and out, so it is preferable that the degree of expansion of the main body portion 1a, the inflatable portion 2a, and the inflatable portion 3a can be adjusted by injecting air thereinto.

[0239] In addition, in the case of an embodiment in which the degree of swelling can be adjusted with water, the temperature of the water can be changed to change the feeling of use. For example, by filling the main body portion 1a, the swelling portion 2a, and the swelling portion 3a with cold water, the user can feel cool and use it like a water pillow. Also, for example, by filling the main body portion 1a, the swelling portion 2a, and the swelling portion 3a with warm water, the user can apply the cushion L to a painful area such as the lower back to relieve pain.

[0240] Furthermore, the main body portion 1a, the swelling portion 2a, the swelling portion 3a, and the connecting portions 10a do not necessarily have to be made of vinyl chloride resin. Any suitable material can be used as long as it feels good against the skin when inflated and can be inflated by injecting air into the inside. For example, instead of vinyl chloride resin, polyester fiber can be used, which can be inflated by injecting air. Furthermore, if the inflatable cushion is to be inflated by injecting water or hot water into the inside, the main body portion 1a, the swelling portion 2a, the swelling portion 3a, and the connecting portions 10a can be made of materials such as chloroprene rubber or nylon.

[0241] Furthermore, cushion L can be used by changing its shape into various shapes, similar to cushion A. For example, it can be shaped such that bulging portions 2a and 3a are bent toward main body portion 1a on the surface side of main body portion 1a (see FIG. 26(a)), or bulging portion 2a is bent toward the back side of main body portion 1a and bulging portion 3a is bent toward the surface side of main body portion 1a (see FIG. 26(b)).

[0242] Also, for example, the shape may be such that the bulging portions 2a and 3a are largely bent toward the main body portion 1a on the surface side of the main body portion 1a (see FIG. 26(c)), or such that the main body portion 1 is wrapped around the bulging portion 3a and the bulging portion 3a is rotated toward the bulging portion 2a (see FIG. 26(d)). These various shapes may be arranged in the same manner as the various arrangements of the cushion A described above.

[0243] A modified example of the fourteenth embodiment of the present invention will be described with reference to Figures 27(a) and 27(b). Note that the same members as those in the cushion L described above will be given the same reference numerals and their description will be omitted.

[0244] The cushion G shown in FIG. 27(a) has a main body 1a and a bulge 2b and a bulge 3b on either side of the main body 1a. Each of the bulges 2b and 3b has an internal partition 11b. The internal partitions 11b are formed by welding sheet-like partitions (not shown) made of vinyl chloride resin to the top and bottom surfaces of the inside of the bulges 2b and 3b along the short side (longitudinal) direction of the main body. The width direction of the sheet-like partition is aligned with the thickness direction of the bulges 2b and 3b. The provision of the sheet-like partitions ensures that the bulges 2b and 3b maintain a consistent thickness even at the position of the internal partitions 11b when air is injected into the bulges 2b and 3b to divide them into multiple bulge compartments, as described below.

[0245] More specifically, the internal partition 11b has a gap between the upper end or lower end of the bulging portion 2b (bulging portion 3b) in the vertical direction in Fig. 27(a) inside the bulging portion 2b and the bulging portion 3b. Therefore, air can pass through the gap, and even if the internal partition 11b is provided, air can be distributed throughout the entire interior of the bulging portion 2b or the bulging portion 3b.

[0246] By providing this internal partition 11b, when inflated with air, inflatable portions 2b and 3b do not form one large inflated shape, but rather are divided into multiple inflated sections extending left and right. This shape makes it easier to fit inflatable portions 2b and 3b around the user's waist and neck, and increases the number of areas in which inflatable portions 2b and 3b come into contact with the body, enabling more stable support of body parts.

[0247] Furthermore, as described above, the internal partition 11b does not have a structure that completely separates the inside of the bulge 2b or the bulge 3b, and by simply providing one injection port (not shown) for the bulge 2b or the bulge 3b, it is possible to distribute air throughout the inside of the bulge 2b or the bulge 3b.

[0248] In the cushion H shown in FIG. 27(b), a bulge 2a and a bulge 3a are provided on both sides of the main body 1b. Two internal partitions 11c are also formed in the main body 1b (see FIG. 27(b)). These internal partitions 11c are formed by welding sheet-like partition materials (not shown) made of vinyl chloride resin to the top and bottom surfaces of the inside of the main body 1b along the longitudinal direction (left-right direction) of the main body 1b. The width direction of the sheet-like partition material is aligned with the thickness direction of the main body 1b. By providing these sheet-like partition materials, a consistent thickness can be maintained even at the positions of the internal partitions 11c when air is injected into the main body 1b to divide it into multiple inflatable compartments, as described below.

[0249] Furthermore, the main body portion 1b and the bulging portion 2a, and the main body portion 1b and the bulging portion 3a are connected by connecting portions 10b, respectively.

[0250] More specifically, the internal partition 11c has a gap between the left end or the right end of the main body 1b in the left-right direction in Fig. 27(b) inside the main body 1b, allowing air to pass through the gap, and allowing air to circulate throughout the entire interior of the main body 1b even with the internal partition 11c.

[0251] By providing these two internal dividers 11c, when main body 1b is inflated with air, it is possible to inflate it into a shape that is divided into multiple inflated sections along the width of main body 1c, rather than into one large inflated section. This shape makes it easier to fit main body 1b around the user's waist and neck, and increases the number of areas of main body 1b that come into contact with the body, making it possible to support parts of the body more stably.

[0252] Furthermore, as described above, the internal partition 11c does not have a structure that completely separates the inside of the main body 1b, and by simply providing one inlet (not shown) in the main body 1b, it is possible to distribute air throughout the inside of the main body 1b.

[0253] [Fifteenth embodiment] In the fifteenth embodiment of the present invention, a further example of a structure for providing a bulge to a cushion will be described. In the cushion I shown here, the outer shape of the entire cushion is formed by a cover body 16 (see FIG. 28(a)).

[0254] The cover body 16 of this cushion I is made of cloth or synthetic leather and has a main body portion 161 and a bulge portion 162 and a bulge portion 163 provided on both sides of the main body portion 161. The main body portion 161 is connected to the bulge portion 162 or the bulge portion 163 by a connecting portion (reference numeral omitted).

[0255] In addition, the cover body 16 has bulging portions 162 and 163 formed in a pocket shape, and is configured so that a cushion inner material 17 made of urethane chip material and an expandable cushion material 18 can be placed inside.

[0256] The cushion filling 17 is formed by filling the inside of a bag-shaped inner cover with urethane chip material. The size of the cushion filling 17 can be changed by adjusting the amount of urethane chip material placed inside the inner cover. Hereinafter, cushion filling 17 refers to a cushion filling made of urethane chip material.

[0257] The expandable cushion material 18 is made of vinyl chloride resin and can be inflated by injecting air into it through an inlet (see Figures 28(a) and 28(b)). The size of the expandable cushion material 18 can be changed by adjusting the amount of air injected.

[0258] That is, in the cushion I, the cushion inner material 17 and the expandable cushion material 18 are arranged inside the expansion portions 162 and 163 of the cover body 16, so that the expansion portions 162 and 163 can be greatly expanded.

[0259] For example, as shown in Figures 29(a) and 29(b), two expandable cushion materials 18 are prepared, inflated by injecting air into them, and placed inside the pocket-like structures of the bulging portions 162 and 163 of the cover body 16, thereby making it possible to greatly inflate the bulging portions 162 and 163.

[0260] Although not shown, it is also possible to use a structure in which cushion inner material 17 is placed in both bulging portion 162 and bulging portion 163, or a structure in which cushion inner material 17 is placed in one portion and expandable cushion material 18 is placed in the other portion.

[0261] Furthermore, the cushion I may also have a structure in which a plurality of cushion inner materials are arranged for one of the swelling portions 162 (or swelling portion 163).

[0262] For example, instead of using one 100g piece of urethane chip material in the cushion filling 17 for the bulge 162 (or bulge 163), it is also possible to use a combination of three types of cushion filling 17a (80g), cushion filling 17b (20g) and cushion filling 17c (10g) each containing a smaller amount of urethane chip material (see Figure 30(a)).

[0263] Here, by combining a plurality of cushion inner materials 17a, etc., each containing a different amount of urethane chip material, the size and degree of inflation of inflated portion 162 (or inflated portion 163) can be easily changed simply by inserting or removing cushion inner materials 17a, etc. Also, the degree of inflation of inflated portion 162 and inflated portion 163 can be made different.

[0264] In this way, by changing the combination of cushion inner material 17a, cushion inner material 17b, and cushion inner material 17c and putting them into bulging portion 162 or bulging portion 163, the shape of cushion I can be easily changed to suit the user's body and posture.

[0265] Also, instead of the expandable cushion material 18, it is possible to provide a smaller expandable cushion material 18a and use this in combination with the cushion inner material 17a or the like (see FIG. 30(b)).

[0266] Next, a modified example of the cushion I will be described. In the cushion J shown in Figures 31(a) and 31(b), the cover body has a main body portion 161a and bulging portions 162 and 163 provided on both sides of the main body portion 161a. The main body portion 161a is connected to the bulging portion 162 or the bulging portion 163 by a connecting portion (reference numeral omitted).

[0267] The main body 161a of the cushion J is formed in a pocket shape. The cushion J has a main body expandable cushion material 19 that can be placed inside the main body 161a and has approximately the same size as the main body 161a (see FIG. 31(a)).

[0268] The expandable cushion material 19 is made of vinyl chloride resin and can be inflated by injecting air into it through an injection port (not shown) (see Figure 31(a)). The size of the expandable cushion material 19 can be changed by adjusting the amount of air injected.

[0269] In this cushion J, the cushioning properties of the main body portion 161a are enhanced by arranging inflated main body expandable cushion material 19 not only in bulging portions 162 and 163 but also inside the main body portion 161a. Also, by changing the amount of air injected into main body expandable cushion material 19, the degree of inflation can be adjusted, and the size and inflation of main body portion 161a can be easily adjusted.

[0270] Here, the expandable cushion material 19 may be one that is inflated by injecting air, or one that can be inflated by injecting water instead of air to adjust the degree of inflation.

[0271] As a modification of the cushion J, a plate-shaped urethane material 19a having approximately the same size as the main body 161a may be placed inside the main body 161a (see FIG. 31(c)).

[0272] [Sixteenth embodiment] Next, a sixteenth embodiment of the present invention will be described. In the cushion M according to the sixteenth embodiment of the present invention, as shown in Fig. 32, the cover body has a main body portion 161c and bulging portions 162a and 163a provided on both sides of the main body portion 161c. Furthermore, the main body portion 161c is connected to the bulging portion 162a or the bulging portion 163a by a connecting portion 10d.

[0273] Main body 161c of cushion M is formed in a pocket shape, and is configured so that a plate-shaped urethane material (not shown) of approximately the same size as main body 161c can be inserted into and removed from its internal space. The plate-shaped urethane material can be covered with an inner cover (not shown) and placed inside main body 161c.

[0274] In cushion M, by making it possible to insert and remove urethane plate material into main body portion 161c, the user can select a structure in which urethane plate material is placed inside main body portion 161c or a structure in which it is not placed, and the cushioning properties of main body portion 161c can be varied according to the user's preference. When using the cushion as a pillow or when the entire shape of cushion M is deformed into a concave shape, it may be more convenient to use it without the urethane plate material, and this cushion can be easily adapted to such usage modes.

[0275] In addition, a zipper 1610 is formed on the main body 161c, and by opening and closing this zipper 1610, the main body 161c can be switched between an open state in which an opening is formed to allow the plate-shaped urethane material and inner cover to be inserted and removed, and a closed state in which the opening is closed.

[0276] Here, covering the plate-shaped urethane material with an inner cover makes it easier to insert the plate-shaped urethane material inside main body portion 161c. For example, in a structure where the plate-shaped urethane material is not covered with an inner cover, the surface of the plate-shaped urethane material gets caught on the inner periphery of main body portion 161c due to the nature of the urethane material, making the insertion process time-consuming. Therefore, covering the plate-shaped urethane material with an inner cover reduces the chance of it getting caught on the urethane material, making it easier to insert the plate-shaped urethane material inside main body portion 161c.

[0277] Furthermore, by forming this fastener 1610, by inserting a plate-shaped urethane material and an inner cover inside the main body portion 161c and closing the fastener 1610, it is possible to prevent the inserted position of the plate-shaped urethane material from shifting and also to prevent the plate-shaped urethane material and the inner cover from popping out from the main body portion 161c to the outside.

[0278] Here, fastener 1610 does not necessarily need to be formed on main body portion 161c, and a hook-and-loop fastener may be used instead of fastener 1610. For example, when used by elderly people or the like who have difficulty opening and closing with a fastener, using a hook-and-loop fastener makes it easier to switch main body portion 161c between the open and closed states.

[0279] Similarly to the swelling portions 162 and 163, the swelling portions 162a and 163a can be inflated to a large size by disposing the cushion inner material 17 or the expandable cushion material 18 described above.

[0280] The bulging portions 162a and 163a are formed in a pocket shape, and are configured so that the cushion inner material 17 and the expandable cushion material 18 can be put in and taken out of the internal space.

[0281] Furthermore, a fastener 1620 is formed in the expansion portion 162a, and a fastener 1630 is formed in the expansion portion 163a. ​​By opening and closing this fastener 1620, the expansion portion 162a can be switched between an open state in which an opening is formed to allow insertion and removal of the cushion inner material 17 and the expandable cushion material 18, and a closed state in which the opening is closed. The same applies to the fastener 1630 of the expansion portion 163a.

[0282] The formation of this fastener 1620 makes it possible to prevent the cushion inner material 17 or the expandable cushion material 18 from shifting position by placing the cushion inner material 17 or the expandable cushion material 18 inside the expansion portion 162a and closing the fastener 1620, and also to prevent the cushion inner material 17 or the expandable cushion material 18 from popping out of the expansion portion 162a. The same applies to the fastener 1630 of the expansion portion 163a.

[0283] Here, it is not necessary to form fasteners 1620 and 1630 on bulging portions 162a and 163a, and instead, hook-and-loop fasteners can be used. For example, when used by elderly people or the like who have difficulty opening and closing with a fastener, the use of hook-and-loop fasteners makes it easier to switch bulging portions 162a and 163a between the open and closed states.

[0284] Furthermore, two loops 12a are formed on the top and bottom of each of the two connecting portions 10d. That is, four loops 12a are formed on the entire cushion M. A string or a fixing belt can be passed through these loops 12a, and the cushion M can be fixed to the back or seat of a chair or the like via the string or fixing belt.

[0285] [Seventeenth embodiment] In the seventeenth embodiment of the present invention, a further example of a structure in which a plurality of bulging sections are provided in the main body of a cushion will be described. In the cushion K shown here, the outer shape of the entire cushion is formed by a cover body 160 (see FIG. 33(a)).

[0286] This cover body 160 has a main body portion 161b and bulging portions 162 and 163 provided on both sides of the main body portion 161b. The main body portion 161b is connected to the bulging portion 162 or the bulging portion 163 by a connecting portion 10c (see FIG. 33(b)).

[0287] Furthermore, the main body portion 161b is formed double and has two partition seams 11d formed therein. With this structure, three cylindrical spaces 1600 are formed in the main body portion 161b.

[0288] The three cylindrical spaces 1600 of the main body 161b can each be fitted with an elongated cushion inner material 17d (see Fig. 34(a) and Fig. 34(b)). The elongated cushion inner material 17d is formed by filling a bag-shaped inner cover with urethane chip material.

[0289] In this cushion K, by putting a long and narrow cushion inner material 17d inside each of the three cylindrical spaces 1600, the main body 161b can be made to have a shape that is divided into multiple bulging sections along the length of the main body, rather than one large bulge (see FIG. 34(b)). As a result, the main body 161b can be more easily fitted to the waist and neck of the user, and the number of areas of the main body 161b that come into contact with the body increases, making it possible to support parts of the body more stably.

[0290] As a modified example of the cushion K, instead of the elongated cushion inner material 17d, an elongated expandable cushion material 18b may be placed inside the main body 161b (see FIG. 3435(a)), or a strip-shaped urethane material 18c may be placed inside the main body 161b (see FIG. 35(b)). The elongated expandable cushion material 18b is a member whose degree of expansion can be adjusted by injecting water or air into it.

[0291] As described above, the cushion and cushion arrangement structure to which the present invention is applied can support and maintain the user's sitting posture or the posture of the back and head of the body, is easy to use, and can be applied to a wide range of applications, such as furniture chairs, wheelchairs, hairdressing chairs, hair washing chairs, car seats, and beds with reclining functions.

[0292] The terms and expressions used in the present specification and claims are merely for explanatory purposes and are not limiting in any way, and are not intended to exclude terms and expressions equivalent to the features described in the present specification and claims and parts thereof. It goes without saying that various modifications are possible within the scope of the technical idea of ​​the present invention. [Explanation of symbols]

[0293] A Cushion 1 Main body 10 Anti-slip part 2 Bulge 3 Bulge 4 chairs 40 Backrest 41 Armrest 42 Armrest 5. Wheelchair 50 Backrest 51 Armrest 52 Armrest 6. Hair washing chair 60 Backrest 61 Armrest 62 Armrest 7. Hairdressing chairs 70 Backrest 71 Seat 72 Armrest 73 Armrest 8 chairs 80 Backrest 81 Seat 9 beds 90 Backrest 100 seats 101 Backrest 102 Armrest A1 Cushion A2 Cushion B Cushion P1 cervical vertebra P2 Jaw P3 Upper back P4 Occiput C Cushion 11 Loop section 12 Loop section D Cushion 13 Main body 130 Upper body part 131 Lower body part 132 hook and loop fastener 20 Bulge 30 bulge 43 Backrest 44 seat 45 Armrest 46 Armrest E-Cushion 14 Main body 140 Upper body part 141 Upper and lower connection parts 142 Lower body part 21 Bulge 31 Bulge 22 Bulge 32 Bulge F Cushion 150 Upper body part 151 Upper and lower connection parts 152 Lower body part L Cushion 1a Main body 2a Bulging part 3a Bulging part 100a inlet 20a inlet 30a inlet 10a Connection 11a Internal partition G Cushion 2b Bulging part 3b Bulging part 11b Internal partition H Cushion 11c Internal partition 10b Connection I Cushion 16 Cover body 161 Main body 162 Bulge 163 Bulge 17 Cushion filling 18 Expandable cushioning material 17a Cushion filling 17b Cushion filling 17c cushion filling 18a Expandable cushioning material J Cushion 19 Body expansion and contraction cushion material 19a Urethane sheet material M cushion 161a Main body 162a Bulge 163a Bulge 10d Connection 1610 zipper 1620 zipper 1630 zipper 12a Loop section K Cushion 160 Cover body 161b Main body 10c Connection 11d partition seam 1600 Cylindrical Space 17d Long Cushion Filling 18b Long, expandable cushion material 18c rectangular urethane material

Claims

1. a main body formed in a strip shape; a first bulge provided on one end edge of the main body in the longitudinal direction, having a thickness greater than that of the main body, a length along the longitudinal direction of the main body being equal to or less than half the length of the main body in the longitudinal direction, and capable of being bent toward the main body on either the front or back surface side of the main body; a second bulge portion provided on the other end edge of the main body portion in the longitudinal direction, having a thickness greater than that of the main body portion, a length along the longitudinal direction of the main body portion that is equal to or less than half the length of the main body portion in the longitudinal direction, and capable of being bent toward the main body portion on either the front or back surface side of the main body portion; a first connection portion that connects the main body portion and the first bulge portion and separates the main body portion from the first bulge portion; a second connection portion that connects the main body portion and the second bulge portion and separates the main body portion from the second bulge portion; The main body is constituted by a main body cover, which is a cover body, At least one of the first inflatable portion and the second inflatable portion is composed of an inflatable portion cover body, which is a cover body, and at least one of a cushion inner material made of a plurality of chip-shaped members arranged inside the inflatable portion cover body and an expandable cushion material filled with water or air. cushion.

2. At least one of the first bulging portion and the second bulging portion has the cushion inner material disposed inside the bulging portion cover, and the cushion inner material is configured by combining a plurality of inner materials each having a different amount of the chip-shaped member. The cushion of claim 1 .

3. At least one of the first swelling portion and the second swelling portion has the cushion inner material and the expandable cushion material disposed inside the swelling portion cover body. The cushion according to claim 1 or 2.

4. The first bulge portion and the second bulge portion each have the expandable cushion material disposed inside the bulge portion cover body. The cushion of claim 1 .

5. The main body portion is composed of the main body cover body and an expandable cushion material for the main body, which is arranged inside the main body cover body, has the same size as the main body cover body, and is filled with water or air. The cushion according to claim 1 or claim 4.

6. The main body portion is composed of at least one of the main body cover body and a cushion inner material made of a plurality of chip-shaped members and a plurality of main body portion partition expansion / contraction cushion materials filled with water or air, which are arranged inside the main body cover body in a direction parallel to the short side direction of the main body portion and divide the main body portion into a plurality of expansion compartments along the longitudinal direction of the main body portion. The cushion according to claim 1 or claim 4.

7. The first bulge portion and the second bulge portion each have the cushion inner material disposed inside the bulge portion cover body. The cushion of claim 1 .

8. The main body is made of a plate-shaped urethane material that is disposed inside the main body cover and has the same size as the main body cover. The cushion according to claim 1 or claim 7.

9. the main body portion is made of the main body cover and a plate-shaped urethane material having the same size as the main body cover and arranged inside the main body cover so as to be retractable, The urethane material is covered with an inner cover that can be placed inside the main body cover and can accommodate the urethane material therein; The body cover body is formed with a body cover opening / closing section that can switch the state of the body cover body between an open state in which an opening is formed to allow the urethane material and the inner cover to be inserted and removed, and a closed state in which the opening is closed, The inflated portion cover body is provided with an inflated portion cover opening / closing portion that can switch the state of the inflated portion cover body between an open state in which an opening is formed to allow the cushion inner material or the expandable cushion material to be inserted or removed, and a closed state in which the opening is closed. The cushion of claim 1 .

10. The main body is made up of a plurality of rectangular urethane material strips arranged inside the main body cover in a direction parallel to the short side of the main body and dividing the main body into a plurality of bulging sections along the longitudinal direction of the main body. The cushion according to claim 1 or claim 7.

11. A cushion arrangement structure for arranging the cushion according to claim 1 in a chair having a seat, a backrest, and armrests on the outside of both ends of the seat, The cushion is arranged so that one surface of the main body is positioned on the backrest, the first bulging portion is positioned along the extending direction of one side of the armrest and is bent toward the other surface of the main body, and the second bulging portion is positioned along the extending direction of the other side of the armrest and is bent toward the other surface of the main body. Cushion placement structure.

12. A cushion arrangement structure in which a second cushion is arranged on top of the first cushion, which is the cushion arranged on the backrest, The second cushion is arranged so that the main body of the second cushion is hooked onto an upper portion of the backrest and an upper edge of the main body of the first cushion, and one of the first bulge and the second bulge of the second cushion is positioned on the surface of the main body of the first cushion facing the user.

12. The cushion arrangement of claim 11.

13. A cushion arrangement structure for arranging the cushion according to claim 1 in a chair having a seat, a backrest, and armrests on the outside of both ends of the seat, The cushion is arranged so that one surface of the main body is positioned on the seat surface, the first bulge is positioned along the vertical direction of one side of the armrest and bent toward the other surface of the main body, and the second bulge is positioned along the vertical direction of the other side of the armrest and bent toward the other surface of the main body. Cushion placement structure.

14. A cushion arrangement structure for arranging the cushion according to claim 1 in a car seat having a seat surface, a backrest, and armrests arranged inside the car, The cushion is arranged on the backrest so that the first bulge portion bent toward one surface of the main body portion and the one surface of the main body portion is located, and the second bulge portion bent toward the other surface of the main body portion is located along the extending direction of the armrest. Cushion placement structure.

15. A cushion arrangement structure for arranging the cushion according to claim 1 in a chair having a seat and a backrest or a bed having a reclining backrest, The main body is hooked onto an upper portion of the backrest, and the cushion is arranged so that one of the first bulge and the second bulge is positioned on the surface of the backrest facing the user. Cushion placement structure.

16. A cushion arrangement structure for arranging the cushion according to claim 1 in a bed having a reclining backrest, The cushion is arranged in a state where the main body is wrapped around one of the first swelling portion and the second swelling portion as a core toward the other swelling portion, and the other swelling portion is positioned below the one swelling portion along the backrest. Cushion placement structure.

17. A cushion arrangement structure for arranging the cushion according to claim 1 in a chair having a seat and a backrest or a bed having a reclining backrest, The cushion is placed on the backrest with one surface of the main body portion positioned thereon and the first bulge portion and the second bulge portion folded toward the other surface of the main body portion. Cushion placement structure.

18. A cushion arrangement structure in which two cushions according to claim 1 are arranged on a chair having a seat and a backrest or a bed having a reclining backrest, The first cushion is a first cushion. the main body of the first cushion is hooked onto an upper portion of the backrest, and the first cushion is arranged so that one of the first bulging portion and the second bulging portion of the first cushion is positioned on a surface of the backrest facing the user; The second cushion is The second cushion is placed in a state in which the main body portion of the second cushion is placed over a part of the main body portion of the first cushion and the one swelling portion of the first cushion, and the first swelling portion and the second swelling portion of the second cushion are folded toward a surface of the main body portion of the second cushion opposite to a surface facing the first cushion. Cushion placement structure.

19. A cushion arrangement structure in which two cushions according to claim 1 are arranged on a chair having a seat, a backrest, and armrests on the outside of both ends of the seat, The first cushion is a first cushion. The first cushion is arranged so that one surface of the main body of the first cushion is positioned on the seat surface, the first bulge of the first cushion is positioned along the vertical direction of one side of the armrest and is bent toward the other surface of the main body of the first cushion, and the second bulge of the first cushion is positioned along the vertical direction of the other side of the armrest and is bent toward the other surface of the main body of the first cushion, The second cushion is The second cushion is disposed so that one surface of the main body of the second cushion is positioned on the backrest above the first cushion, the first bulging portion of the second cushion is positioned along the extending direction of one side of the armrest and is bent toward the other surface of the main body of the second cushion, and the second bulging portion of the second cushion is positioned along the extending direction of the other side of the armrest and is bent toward the other surface of the main body of the second cushion. Cushion placement structure.

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