WO2021111638A1 - Seat - Google Patents

Abstract

Provided is a seat (1) comprising: a buttocks supporting member (5) which supports the buttocks of a person when sitting; and a through hole forming member (10) forming a through hole (8) which extends vertically to a ground surface in a state in which the ground surface can be seen from above on the side rearward of the buttocks supporting member (5) and below the sacrum of the person when sitting in a state in which the buttocks are supported by the buttocks supporting member (5). When the person is sitting on the seat (1) such that the buttocks are supported by the buttocks supporting member (5), the through hole (8) extending vertically and leading to the ground surface is present below the sacrum of the sitting person.

Description

Seating gear

The present invention relates to a seating tool that allows a seated person to sit.

Training the trunk (the muscles that are important for humans to straighten the spine to form the axis of the body, especially the muscles closest to the spine (inner muscles)) helps maintain good health and improve sports performance. It is known to be important because of its points. Along with this, in recent years, seating tools that can train the trunk when sitting have been developed. For example, in Patent Document 1, expansion and contraction are possible by adjusting the amount of internal air for the purpose of realizing continuous balance movement of the erector spinae muscles while maintaining an appropriate position (neutral position) of the spinal column. A seating tool including a main seat portion as an air bag and a sub-seat portion as a covering bag in which a cushion material is stored is disclosed.

In general, mental refreshment and improvement of concentration are required to be in a meditative state (a state in which the spirit is unified in the Zen world, a state in which the mind is calm, etc.). It is said that it is effective to enter (including). In addition, some studies have shown that entering a meditative state enhances the body's immunity. Along with this, various devices have been proposed in recent years to guide the user to a meditative state. For example, Patent Document 2 describes a seat portion on which a user sits, an illuminating body provided on the back surface of a backrest portion, an α wave detection device for detecting an α wave of the user, and values measured by the α wave detection device. A control device that changes the lighting of the illuminator in response to changes, a hood provided around the seat, and a reflector provided on this hood that reflects the lighting from the illuminator and indirectly illuminates the inside of the hood. A meditation device that includes a breathing regulator that emits a signal and guides the user to a state of meditation is disclosed.

Japanese Unexamined Patent Publication No. 2015-126870 Japanese Unexamined Patent Publication No. 5-253302

However, with the seating tool of Patent Document 1, although a certain effect of improving the trunk can be obtained, it is difficult to adjust the air in the main seat, and a seating tool capable of training the trunk more easily has been desired. Further, since the meditation device of Patent Document 2 is a large-scale device and the configuration of the device is complicated, it has been desired to provide a device capable of guiding meditation with a device having a smaller and simpler structure.

The present invention has been made to solve such a problem, and the seated person can easily train the trunk and guide the seated person to a meditative state with a small and thimble structure. The purpose is to provide seating equipment.

In order to solve the above-mentioned problems, in the seating tool of the present invention, the buttocks support portion that supports the buttocks of the seated person when the seated person is seated, the buttocks on the rear side of the buttocks support portion, and the buttocks are supported by the buttocks support portion. On the lower side of the sacrum of the seated person who sits in the sitting state, a through hole forming portion is provided in which a through hole extending in the vertical direction is formed so as to be able to see the ground when viewed from above.

According to the present invention configured as described above, the seated person recognizes that when seated on the seating tool, there is a through hole extending in the vertical direction with the ground visible below the spine of the seated person. By doing so, they consciously or unconsciously try to stretch the spine along the direction in which the through hole extends. Therefore, according to the present invention, it is possible to make the seated person who sits on the seating tool stretch the back muscles and maintain a state in which an appropriate force is applied to the inner muscle. Therefore, the seated person can easily train the trunk by the simple work of sitting on the seating tool without performing a difficult work.

Further, according to the present invention, the seated person recognizes that when seated on the seating tool, there is a through hole extending in the vertical direction with the ground visible on the lower side of the spine of the seated person. It is easy to hold the image that the ground and the sky (space) are connected through one's spine, and this image makes it easy for the seated person to enter the meditative state. That is, according to the present invention, the seated person can be guided to the meditative state with a compact and thimble configuration that does not have an electronic device such as an α wave detector or a respiratory regulator.

It is a perspective view of the seating tool which concerns on one Embodiment of this invention. It is a top view of the seating tool which concerns on one Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a figure which shows typically the bone from the waist to the buttocks of a human being. It is a perspective view of the through hole forming member which concerns on one Embodiment of this invention. It is a figure which shows the state that a seated person is seated in a seating tool. It is a perspective view of the seating tool which concerns on 1st modification. It is a perspective view of the seating tool which concerns on the 2nd modification. It is a perspective view of the seating tool which concerns on 3rd modification. It is a figure which shows another example of a foot member. It is a perspective view of the seating tool which concerns on 4th modification. It is a perspective view of the seating tool which concerns on 5th modification. It is a perspective view of the through hole forming member which concerns on 5th modification. It is a figure which shows the state that a seated person is seated in a seating tool. It is a perspective view of the ischium support member which concerns on 6th modification. It is the top view and the front view of the seating tool which concerns on 6th modification. It is a figure which shows another example of the ischium support member. It is the top view and the front view of the seating tool which concerns on 7th modification. It is a top view of the seating tool which concerns on 8th modification. It is a top view of the seating tool which concerns on 9th modification. It is a top view of another example of the seating tool which concerns on 8th modification. It is a top view of the seating tool which concerns on other modification.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the seating tool 1. FIG. 2 is a top view of the seating tool 1. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is a diagram schematically showing a human bone from the waist to the buttocks. In the following description, the vertical direction, the horizontal direction, and the front-rear direction shall follow the directions indicated by the double-headed arrows in FIGS. The vertical direction corresponds to the vertical direction when the seating tool 1 is placed on the ground 2 (FIG. 3) in a normal manner. Further, the front in the front-rear direction is the direction in which the abdomen of the seated person 3 faces when the seated person 3 (see FIG. 6 described later) is normally seated on the seating tool 1, and the back of the seated person 3 is in the rear direction. It is the direction to face. Normal seating will be described later. In addition, the left-right direction is a direction perpendicular to the front-back direction on a horizontal plane perpendicular to the up-down direction, the right side in the left-right direction is rightward toward the front, and the left side is leftward toward the front. is there.

In the following description, "ground 2" is a general term for a flat area on which the seating tool 1 is placed. Therefore, when the seating tool 1 is placed on the tatami mat or flooring in the room, these correspond to the "ground 2". Further, for convenience of explanation, the dimensions of each member shown in the drawings (not limited to FIGS. 1 to 3) may be shown in a ratio different from the actual dimensions.

The seating tool 1 is a device that allows the seated person 3 to sit like a stool. In particular, the seating tool 1 according to the present embodiment has a purpose of training the trunk, a meditation state (in the present embodiment, a state in which the spirit is unified in the Zen world, a state in which the mind is calm, etc. It is assumed that the seated person 3 will use it for the purpose of entering (including a mentally fulfilled state) or for both purposes.

As shown in FIGS. 1 and 2, the buttock 1 includes a buttock support member 5 (corresponding to the "buttock support portion" in the claims). The buttocks support member 5 is a member that supports the buttocks of the seated person 3 when the seated person 3 is seated, and is located on the right side of the ischial support member 6R (corresponding to the "ischium support part" in the claims) and on the left side. It includes a pair of ischial support members 6R and 6L (corresponding to the "pair of ischial support" in the claims) including the arranged ischial support members 6L (corresponding to the "pair of ischial support" in the claims). .. Hereinafter, when the sciatic support member 6R and the sciatic support member 6L are not distinguished, they are referred to as "ischium support member 6".

The pair of ischial support members 6R and 6L are members that support the pair of ischial bones (see FIG. 4) of the seated person 3 when the seated person 3 is seated. The shapes of the ischial support members 6R and 6L are cylindrical. The ischial support member 6R and the ischial support member 6L have the same shape. The buttock support member 5 is configured by being arranged side by side in the left-right direction so that the side surfaces of the pair of ischial support members 6R and 6L come into contact with each other at the contact portions 7 (see FIGS. 1 and 2). The contact here includes a state in which they are close enough to be regarded as being in contact with each other. In this case, the contact portion 7 means a portion in which the pair of ischial support members 6R and 6L are closest to each other. The seating tool 1 is placed upright on the ground 2 by erection of a pair of ischial support members 6R and 6L on the ground 2.

It is preferable that the ischial support members 6R and 6L are made of a member having at least a flexible portion in contact with the buttocks of the seated person 3. By providing a certain degree of flexibility to the portion of the seated person 3 in contact with the buttocks, the burden on the buttocks of the seated person 3 can be reduced and the discomfort when sitting can be eliminated. The flexible member may be, for example, a rubber member, a cotton-filled member, or a flexible resin member such as urethane. Among these, a rubber member is used. Is preferable. The flexible member may be the entire ischial support members 6R and 6L, or may be a portion having a certain thickness on the surface in contact with the buttocks of the seated person 3.

When the shape of the ischial support members 6R and 6L is a cylinder, it is preferable that the diameter D1 (see FIG. 2) is 12 to 20 cm. By setting the diameters D1 of the ischial support members 6R and 6L to the above range, the pair of ischial bones of the seated person 3 can be accommodated when the seated person 3 is seated in consideration of the amount of separation of the standard pair of human ischial bones. The site can be accurately positioned on the pair of ischial support members 6R and 6L, and a through hole 8 described later can be sufficiently secured.

The height H1 (FIG. 3) of the ischial support members 6R and 6L (= buttock support member 5) depends on the use of the seating tool 1 and the standard body size of the seater 3 of the target age group. However, it is preferable that the soles of the seated person 3 who normally sits on the ground 2 have a margin. As an example, the height H1 is 60 cm or less. If the height H1 exceeds 60 cm, the sole of the foot may move away from the ground 2, causing the posture of the seated person 3 to become unstable, and as will be clarified later, the effect of strengthening the trunk and the effect of inducing meditation. This is because there is a risk that sufficient amount will not be obtained.

As shown in FIGS. 1 to 3, a through hole forming member 10 (corresponding to the “through hole forming portion” in the claims) is provided behind the buttocks support member 5. FIG. 5 is a perspective view of the through hole forming member 10. The through hole forming member 10 is a member in which a through hole 8 extending in the vertical direction extends up to the ground 2 in a state where the ground 2 can be seen when viewed from above. As shown in FIG. 3, the through hole forming member 10 is configured such that the upper surface thereof is slightly lower than the upper surface of the buttock support member 5. However, the height of the upper surface of the through hole forming member 10 may be the same as the height of the upper surface of the buttock support member 5. As shown in FIGS. 1, 2 and 5, the through hole forming member 10 includes a right side surface member 11 (corresponding to the “one side surface portion” of the claims) and a left side surface member 12 (corresponding to the “one side surface portion” of the claims). Corresponds to "the other side surface").

The right side surface member 11 is formed with an fitting portion 13R (see FIG. 5) that is curved according to the shape of the arc on the side surface of the ischial support member 6R. The ischial support member 6R is fitted and fixed to the fitting portion 13R. When the ischial support member 6R is fitted into the fitting portion 13R, the right side surface member 11 is in a state of extending by a certain amount along the posterior surface of the ischial support member 6R with the contact portion 7 as the base end portion. The left side surface member 12 is formed with an fitting portion 13L (see FIG. 5) that is curved according to the shape of the arc on the side surface of the ischial support member 6L. The ischial support member 6L is fitted and fixed to the fitting portion 13L. When the ischial support member 6L is fitted into the fitting portion 13L, the left side surface member 12 is in a state of extending by a certain amount along the posterior surface of the ischial support member 6L with the contact portion 7 as the base end portion. When both the pair of ischial support members 6R and 6L are fixed to the through hole forming member 10, the pair of ischial support members 6R and 6L are arranged side by side in the left-right direction in a state of being in contact with each other at the contact portion 7.

As shown in FIGS. 1 to 3 and 5, the through hole forming member 10 is interposed between the tip end portion of the right side surface member 11 and the tip end portion of the left side surface member 12, and is located on the rear side of the buttocks support member 5. A rear surface member 14 (corresponding to the “rear surface portion” in the claims) that is curved so as to be convex toward the surface is provided. A through hole 8 is formed in a portion surrounded by the right side surface member 11, the left side surface member 12, and the rear surface member 14. The through hole 8 extends in the vertical direction up to the ground 2 in a state where the ground 2 can be seen when viewed from above (see particularly FIG. 2). The through hole 8 is on the posterior side of the buttock support member 5, and as will be clarified later, the sacrum of the seated person 3 (FIG. 4) who normally sits with the buttock supported by the buttock support member 5. Located on the lower side.

The through hole forming member 10 is a member that forms the through hole 8. The effect of forming the through hole 8 by the through hole forming member 10 will be described in detail later, but the presence of the through hole forming member 10 increases the portion of the seat tool 1 in contact with the ground 2, so that the seat tool 1 can be moved. The stability of the seating tool 1 is improved when it is placed on the ground 2 and when the seated person is seated on the seating tool 1 placed on the ground 2.

The maximum width W1 (FIG. 2) of the through hole forming member 10 in the left-right direction can be appropriately set according to the shape of the buttock support member 5, the application of the seating tool 1, and the like. For example, the maximum width W1 can be set in the range of 10 to 50 cm. However, the maximum width W1 is preferably in the range of 15 to 40 cm. By setting the maximum width W1 to the above range, the ischial support members 6R and 6L can be reliably attached, and stability when seated can also be obtained.

The material constituting the through hole forming member 10 is not particularly limited as long as it has a strength that can withstand the seating device for the seated person 3. For example, the through-hole forming member 10 includes a material derived from wood (veneer plate, bamboo, etc.), a material derived from metal (iron, steel, alloy, etc.), ceramics, glass, wisteria, stone, concrete, fiber. , Carbon fiber, rubber, plastic, paper, etc. The thickness T1 of the through hole forming member 10 (see FIG. 2) is not particularly limited and can be appropriately set according to the shape, the material used, and the like. However, from the viewpoint of weight reduction and securing a wide through hole 8, the thickness T1 is preferably 20 mm or less, and more preferably 15 mm or less. Further, the surface of the through hole forming member 10 may be coated for rust prevention and flaw prevention, and may be decorated to enhance the design, if necessary.

The opening area of the through hole 8 ^{is preferably 20 cm 2} or more, more preferably 25 cm ² or more, and ^{further preferably 30 cm 2} or more. By setting the opening area to 20 cm ² or more, the stability when the seating tool 1 is placed on the ground 2 can be improved, and as will be clarified later, the effect of introducing the seating tool 1 into a higher meditation state can be expected.

As shown in FIGS. 1 to 3 and 5, in the rear surface member 14 of the through hole forming member 10, the contact member 16 (the present invention within the scope of the claims) is located at a position facing the contact portion 7 of the buttock support member 5. Corresponding to the "contact part") is attached. The contact member 16 is an elliptical spherical member having flexibility. The abutting member 16 refers to the tip of the coccyx or sacrum of the seated person 3 who normally sits with the buttocks supported by the buttock support member 5 (see FIG. 4, hereinafter, the tip of the coccyx or sacrum is generically referred to as “ It is a member that comes into contact with the part corresponding to the coccyx, etc.). A notch is formed in the lower portion of the abutting member 16, and the abutting member 16 is fixed to the rear surface member 14 with the rear surface member 14 inserted in the notch.

The shape of the abutting member 16 is not particularly limited as long as it is provided in a portion corresponding to the coccyx or the like of the seated person 3 and can be in contact with the coccyx or the like. However, it is preferably elliptical and spherical in that it can come into contact with the coccyx and the like and does not unnecessarily cover the through hole 8. The shape of the contact member 16 can be appropriately changed according to the required performance, design items, and the like. For example, the contact member 16 may have a rod shape (cylindrical shape). Further, when the contact member 16 has an elliptical spherical shape, its major axis D2 (see FIG. 2, the longest diameter in the horizontal direction) is 5 to 8 cm, and its height H2 (see FIG. 3, the longest diameter in the vertical direction). Is preferably 6 to 12 cm. By setting the major axis D2 and the height H2 in the above ranges, when the seater 3 normally sits on the seating tool 1, the contact member 16 can be more reliably brought into contact with the portion corresponding to the coccyx or the like. This is because the through hole 8 can be sufficiently secured. Even if the contact member 16 has a shape other than the ellipsoidal sphere, it is preferable that the height H2 is in the same range from the same viewpoint.

Further, as shown in FIG. 3, the upper end 16U of the abutting member 16 has a structure in which the pair of ischial support members 6R and 6L abut on the pair of ischia and the abutting member 16 abuts on the coccyx or the like when seated. , Provided above the upper surface of the pair of ischial support members 6R, 6L. The height position of the upper end 16U of the abutting member 16 can be appropriately designed, but the height difference G1 (FIG. 3) from the upper surface of the pair of ischial support members 6R and 6L is 3 to 10 cm. It is preferable to do so.

The method of attaching the contact member 16 to the rear surface member 14 is not particularly limited. For example, it can be attached by the frictional force generated between the notch and the rear surface member 14, and it can also be attached by a dedicated attachment mechanism or screwing, and it is joined by welding or using an adhesive. You can also do it. However, it is preferable that the contact member 16 is removable from the rear surface member 14. Thereby, the seated person 3 can attach / detach the contact member 16 according to the purpose of using the seating tool 1 or according to the mood of the seated person 3.

The seater 3 sits on the seating tool 1 having the above structural features in the following manner. In addition, the seating tool 1 has the following effects due to its structural characteristics. FIG. 6 is a view of the state when the seated person 3 is normally seated on the seating tool 1 from the right side to the left side of the seating tool 1. However, in FIG. 6, the seating tool 1 is cut along the AA cross section of FIG. In FIG. 6, reference numeral P1 indicates a portion corresponding to the ischium, and reference numeral P2 indicates a human portion corresponding to the coccyx or the like (the tip of the coccyx or the sacrum). Hereinafter, the site P1 corresponding to the ischium is referred to as "ischium-corresponding site P1", and the site P2 corresponding to the coccyx or the like is referred to as "coccyx-corresponding site P2".

As shown in FIG. 6, in the seated person 3, each sciatic correspondence portion P1 of his / her pair of ischia is located in the central region of the upper surface of the pair of ischial support members 6R and 6L, and corresponds to the coccyx and the like. The portion P2 is seated on the seating tool 1 so as to be in contact with the contact member 16. However, in FIG. 6, a state in which the right ischium-corresponding portion P1 is located in the central region of the upper surface of the ischium support member 6R is drawn. The seated person 3 sits on the seating tool 1 while being conscious of making such a state. This state is the state of being seated normally. The central region of the upper surface of the ischial support member 6 is a region having a certain extent including the center point of the upper surface of the ischial support member 6.

Since the abutting member 16 is a central portion of the seating tool 1 in the left-right direction and is provided at a position separated from the buttock support member 5 with a distance of 8 minutes from the buttock support member 5, the seated person 3 has his own tailbone or the like. When the seat is seated while being aware that the corresponding portion P2 is brought into contact with the contact member 16, the center of the upper body of the seated person 3 in the left-right direction is naturally located at the center of the seating tool 1 in the left-right direction. Naturally, the pair of sciatic support sites P1 are located in the central region of the pair of sciatic support members 6R and 6L, and normal seating is completed. When the pair of ischial support sites P1 of the seated person 3 are located in the central region of the pair of ischial support members 6R and 6L, the pair of ischial bones are supported by the pair of ischial support members 6R and 6L, and eventually the buttocks support members. By 5, the buttocks of the seated person 3 are supported.

As described above, the pair of ischial support members 6R and 6L are independent columnar members standing on the ground 2, and the pair of ischial support sites P1 are balanced in the central region of the pair of ischial support members 6R and 6L. The seating person 3 has an image that the seating is stable when the seat is well positioned and the seating is stable at such a time. This also makes the seated person 3 aware that the pair of ischial corresponding parts P1 are seated on the seating tool 1 in a state where the pair of ischial support members 6R and 6L are located in the central region.

In FIG. 2, the broken line circle with the symbol R1 indicates the approximate area where the sacrum is located when the seated person 3 is normally seated. In FIG. 6, the broken line circle with the symbol R2 indicates the approximate position of the sacrum. As shown in FIGS. 2 and 6, the through hole 8 is located below the sacrum of the seated person 3 who normally sits on the seating tool 1 with the buttocks supported by the buttocks supporting member 5. Then, the existence of the through hole 8 extending in the vertical direction up to the ground 2 with the ground 2 visible, or the recognition that such a through hole 8 exists on the lower side of its own sacrum has the following effects. To give birth to.

That is, the seated person 3 consciously or unconsciously recognizes that there is a through hole 8 extending in the vertical direction up to the ground 2 in a state where the ground 2 can be seen below the sacrum of the seated person 3. An attempt is made to extend the back muscle connected to the sacrum along the direction in which the through hole 8 extends, that is, in the vertical direction. Therefore, according to the present embodiment, the seated person 3 who sits on the seating tool 1 can stretch the back muscles and maintain a state in which an appropriate force is applied to the inner muscle. Therefore, the seated person 3 can easily train the trunk by a simple work of normally sitting on the seating tool 1 without performing a difficult work such as adjusting the air of some device.

The following reasons can be considered as the reason why the seated person 3 tries to stretch the back muscle by recognizing that the through hole 8 exists on the lower side of the sacrum. That is, it is conceivable that the existence of the cavity connected to the ground 2 directly under the sacrum of the sacrum gives the seated person a kind of tension and consciously or unconsciously stretches the back muscle. Further, in the absence of a physical backrest, the presence of the through hole 8 gives the seater 3 an image of a backrest or a pillar that pierces the through hole 8 and extends toward the sky, and this image is given to the seater 3. It is conceivable to stretch the back muscles consciously or unconsciously. When the through hole 8 communicating with the ground and extending in the vertical direction is not provided on the rear side of the buttock support member 5, for example, the rear surface member 14 is removed and the rear side of the buttock support member 5 is regarded as an open space. It has been found by the inventor's research that the effect of the seated person 3 naturally stretching the back muscles is unlikely to occur when the through hole 8 is closed.

In particular, in the present embodiment, the corresponding portion P2 such as the coccyx is in contact with the contact member 16. Therefore, the seated person 3 gets a feeling that the contact member 16 is in contact with the coccyx or the like, and this feeling becomes a kind of stimulus to consciously or unconsciously stretch the back muscles. Conceivable.

Further, as shown in FIG. 4, the pair of ischia and the coccyx form a triangle. The pair of ischia and coccyx are bones that project from the buttocks when seated. Therefore, as shown in FIGS. 1 and 2, by providing the pair of ischial support members 6R and 6L and the contact member 16 at positions corresponding to the pair of ischia and coccyx, the buttocks and other parts of the seater 3 are provided. The buttocks can be supported by three-point support without imposing an excessive burden on the part. By supporting the buttocks with a pair of ischia and coccyx, the posture of the seated person 3 can be corrected more effectively, and the inner muscle can be maintained in a state in which an appropriate force is applied. As a result, the trunk It becomes possible to train.

Further, the seated person 3 can easily enter the meditation state by recognizing that there is a through hole extending in the vertical direction in a state where the ground 2 can be seen below the sacrum of the seated person 3 when seated on the seating tool. It becomes a state. Therefore, according to the present embodiment, the seated person 3 can be guided to the meditation state with a small and thimble configuration that does not have an electronic device for assisting the transition to the meditation state.

The following items can be considered as the reason why the seated person 3 can easily enter the meditation state by recognizing that the through hole 8 exists on the lower side of the sacrum. That is, it is easy for the seated person 3 to have an image that the ground 2 and the sky (universe) are connected through their own sacrum and the spine connected to the sacrum, and this image makes it easy for the seated person 3 to enter the meditation state. It is possible that there is. It is widely known that the image of human beings being connected to nature has a positive effect on the transition to a meditative state.

Further, since the space is directly connected from the ground 2 to the buttocks of the seated person 3 through the through hole 8, the seated person 3 is given an appropriate relaxed state, and in some cases, the ground 2 feels like meditation. It is possible to give the seated person 3 the image that he / she is getting something, and it is considered that this makes the seated person 3 easy to enter the meditation state. Further, as described above, when the seating tool 1 is normally seated, the seated person 3 naturally stretches his / her spine and is in a state where an appropriate force is applied to the inner muscle, but this good posture and a good posture are maintained. It is possible that this has a positive effect on the transition to the meditative state. When the through hole 8 communicating with the ground and extending in the vertical direction is not provided on the rear side of the buttock support member 5, for example, the rear surface member 14 is removed and the rear side of the buttock support member 5 is regarded as an open space. According to the research of the inventor, it is difficult to obtain the effect that the seated person 3 is likely to enter the meditation state when the through hole 8 is closed.

<First modification>
Next, a first modification of the above embodiment will be described. In the following description of the first modification, the same elements as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. This also applies to other modifications described later.

FIG. 7 is a perspective view of the seating tool 20 according to the first modification. The seating tool 20 according to this modification is assumed to be used as a sitting chair or a sitting chair. As is clear from the comparison between FIGS. 7 and 1, the height of the buttock support member 21 (= the height of the pair of ischial support members 22R and 22L) of the buttock 20 is the buttock support member 5 according to the above embodiment. Lower than the height of. The height of the buttocks support member 21 of the seating tool 20 is appropriately designed according to the assumed usage mode of the seating tool 20. However, when the seating tool 20 is used as a sitting chair or a sitting chair, the height of the buttocks support member 21 is preferably 6 to 15 cm. If the height of the buttock support member 21 is less than 6 cm, the posture at the time of sitting may become cramped, and if the height exceeds 15 cm, the posture at the time of sitting may not be stable. is there.

In the seated person 3, the pair of ischia of the seated person 3 is supported by the pair of ischial support members 22R and 22L, and the contact member 16 contacts the corresponding portion P2 such as the coccyx of the seated person 3. Sit on the ischial tool 20 in this state. At that time, when the seater 3 uses the seating tool 20 as a sitting chair, for example, when he / she sits on the seating tool 20 with his / her knees cross-legged, and when the seating tool 20 is used as a sitting chair. For example, bend the right knee by about 180 ° to position the part below the right knee to the right side of the ischial support member 22R, bend the left knee by about 180 ° and place the part below the left knee from the ischial support member 22L. Position it on the left side and sit on the seat 20 in a state close to sitting upright.

The posture of the upper back when the seated person 3 is seated on the seating tool 20 and the relationship between the portion above the buttocks of the seated person 3 and each member of the seating tool 20 are the same as those in the above embodiment. According to the above embodiment, the same effect as that of the above embodiment is obtained.

<Second modification>
Next, a second modification of the above embodiment will be described. FIG. 8 is a perspective view of the seating tool 24 according to the second modification. As is clear from the comparison between FIG. 8 and FIG. 1, the seating tool 24 is different from the above embodiment in that the contact member 16 according to the above embodiment is not provided. When the seated person 3 is seated on the seating tool 24 and the pair of ischial bones of the seated person 3 is supported by the pair of ischial support members 6R and 6L, the sacrum of the seated person 3 is positioned above the through hole 8. .. As a result, the posture of the seated person 3 becomes the same as that of the above embodiment, and the effect described in the first embodiment (however, the effect derived from the contact member 16 is excluded) is generated.

<Third modification example>
Next, a third modification of the above embodiment will be described. FIG. 9 is a perspective view of the seating tool 26 according to the third modification. As is clear from the comparison between FIGS. 9 and 1, in the seating tool 26, the pair of ischial support members 28R and 28L constituting the buttocks support member 27 and related members are the ischial support members 6R and 6L according to the above embodiment. And related members are different.

More specifically, in the seating tool 26, a pair of ischial support members 28R and 28L having a height smaller than that of the first embodiment are attached and fixed to the upper portion of the through hole forming member 10. Hereinafter, when the ischium support member 28R and the ischium support member 28L are not distinguished, they are referred to as "ischium support member 28". The positions of the upper surfaces of the pair of ischial support members 28R and 28L are slightly higher than the positions of the upper surfaces of the through hole forming member 10 as in the above embodiment.

Further, as shown in FIG. 9, a pair of foot members 29R and 29L are fixed to the lower part of the through hole forming member 10. Hereinafter, when the foot member 29R and the foot member 29L are not distinguished, they are referred to as "foot member 29". The shape of the foot member 29 is the same as the shape of the ischial support member 28. The lower surfaces of the pair of foot members 29R and 29L and the lower surface of the through hole forming member 10 are located on the same plane. The entire lower surface of the pair of foot members 29R and 29L comes into contact with the ground 2 and causes the seating tool 26 to stand up against the ground 2. It is the same as the above-described embodiment that the through-hole forming member 10 effectively functions to prevent the seating tool 26 from tipping over.

The posture when the seated person 3 is normally seated on the seating tool 26 and the relationship between the body of the seated person 3 and each member of the seating tool 26 are the same as those in the above embodiment. It has the same effect as. Further, according to this modification, the weight of the seating tool 26 can be reduced. The seating tool 26 according to the present modification may be configured not to be provided with the contact member 16 as in the second modification.

Further, the shape of the ischial support member 28 and the shape of the foot member 29 do not necessarily have to be the same. For example, as shown in FIG. 10, the foot member 29 has a shape in which the upper surface is a combination of a quadrangle and a semicircle. , May be composed of columnar members. In this case, the semicircular portion is fitted into the ischial support member 28 when viewed from above. However, if the shape of the ischial support member 28 and the shape of the foot member 29 are the same, it is advantageous for mass production of the seating tool 1. Further, the foot member 29 may be detachable from the through hole forming member 10. By removing and using the foot member 29, the seated person 3 who sits on the seating tool 26 exerts a force on the inner muscle so that the posture of the seating tool 26 is stabilized, and as a result, the effect of strengthening the trunk is further enhanced. Can be done.

<Fourth modification>
Next, a fourth modification of the above embodiment will be described. FIG. 11 is a perspective view of the seating tool 30 according to the fourth modification. As is clear from the comparison between FIGS. 11 and 1, in the present modification, the contact member 31 and the members related thereto are different from the above-described embodiment. More specifically, in this modification, the columnar contact portion support member 32 is attached to the rear surface member 14 at a position facing the contact portion 7. A contact member 31 having substantially the same shape as the shape of the upper half of the contact member 16 according to the above embodiment is attached to the upper surface of the contact portion support member 32.

The posture when the seated person 3 is seated on the seating tool 30 and the relationship between the body of the seated person 3 and each member of the seating tool 30 are the same as those in the above embodiment. Play the effect of. Further, according to this modification, the contact member 31 can be more stably fixed to the through hole forming member 10. As for the seating tool 30 according to the present modification, the height of the seating tool 30 may be reduced to be used as a sitting chair, a sitting chair, or the like, as in the first modification. Further, for the seating tool 30 according to the present modification, instead of the pair of ischial support members 6R and 6L, the pair of ischial support members 28R and 28L and the pair of foot members 29R and 29L according to the third modification are used as the third modification. It may be provided in the same manner as above.

<Fifth modification>
Next, a fifth modification of the above embodiment will be described. FIG. 12 is a perspective view of the seating tool 33 according to the fifth modification. FIG. 13 is a perspective view of the through hole forming member 34 according to the fifth modification. As is clear from the comparison between FIGS. 12 and 1 and FIGS. 13 and 5, the shape of the through hole forming member 34 of the seating tool 33 according to the present modification is different from that of the above embodiment, and the contact member Does not have 16. More specifically, the rear surface member 35 of the through hole forming member 34 is described in the "rear surface corresponding portion 36 corresponding to the rear surface member 14 of the through hole forming member 10 according to the above embodiment" as "the upper surface of the rear surface member 14". The buttock covering portion 37 ”is added so that the arc of the cross section becomes smaller while maintaining the left-right symmetry of the cross section toward the upper side. The buttock covering portion 37 corresponds to the "buttock covering portion" in the claims. The buttock covering portion 37 is provided at a position avoiding the through hole 8 when viewed from above, and in this modified example as well, the ground 2 can be seen through the through hole 8 when viewed from above. ..

FIG. 14 is a view of the seated person 3 normally seated on the seating tool 33 from the right side to the left side of the seating tool 33. When the seated person 3 is normally seated on the seating tool 33 and the pair of ischial bones are supported by the ischial support members 6R and 6L, the buttocks covering portion 37 behind the buttocks of the seated person 3 as shown in FIG. It will be in a state of being covered so as to wrap it around.

According to this modification, the following effects are obtained in addition to the effects described in the above embodiment. That is, the seated person 3 is sensuously aware that the feeling of the buttocks covering portion 37 extending so as to wrap around the buttocks and contacting the periphery of the buttocks extends the back muscle along the direction in which the through hole 8 extends. As a result, the seated person 3 naturally tries to stretch the back muscles. Further, since the buttocks covering portion 37 supports the buttocks of the seated person 3 so as to wrap around the buttocks from behind, it is possible to improve the sense of stability at the time of sitting, and it is possible to further enhance the effect of introduction into meditation. In addition, the seated person 3 can more easily hold the image that something like qi is poured directly from the ground 2 through the through hole 8 into the body, and the effect of inducing the meditative state can be further enhanced.

However, from the viewpoint of training the inner muscle of the seated person 3, it is preferable not to provide the buttock covering portion 37, so that the buttock covering portion 37 can be detachable. For example, referring to FIG. 13, the buttock covering portion 37 can be removed at the boundary between the rear surface corresponding portion 36 and the buttock covering portion 37 shown by the broken line in FIG. 13, so that the buttock 33 is stable at the beginning of use. Use the buttock covering part 37 attached so that you can sit down to enhance the effect of introduction to the meditation state, and after getting used to using the seating tool 33, remove the buttock covering part 37 to make the inner muscle more effective. It becomes possible to be trained in a targeted manner.

<6th modification>
Next, a sixth modification of the above embodiment will be described. FIG. 15 is a perspective view of the ischium support member 41R among the ischium support members 41R and 41L constituting the buttocks support member 40 of the seat tool 39 according to the sixth modification. FIG. 16A is a top view of the seating tool 39 according to the sixth modification. FIG. 16B is a view of the seating tool 39 according to the sixth modification from the front side to the rear side of the seating tool 39.

As shown in FIGS. 15 and 16, the ischial support member 41R includes a columnar column portion 42R (corresponding to the “pillar portion” in the claims) and a raised portion 43R (patent claim) raised from the upper surface of the column portion 42R. Corresponds to the "raised part" in the range of). As shown in FIG. 16A, the raised portion 43R is left and right along a virtual line passing through the center of the upper surface of the pillar portion 42R so that the width in the front-rear direction becomes smaller toward the right when viewed from above. It extends in the direction. The shape of the ischial support member 41L is the same as the shape of the ischial support member 41R. As shown in FIG. 16A, the ischial support member 41R and the ischial support member 41L are arranged symmetrically. Therefore, the raised portion 43L of the ischial support member 41L is along a virtual line passing through the center of the upper surface of the pillar portion 42L of the ischial support member 41L so that the width in the anteroposterior direction decreases toward the left when viewed from above. It extends in the left-right direction. The heights of the ischial support members 6R and 6L according to the above embodiment and the heights of the ischial support members 41R and 41L ( pillar portions 42R and 42L + raised portions 43R and 43L) according to the present modification are substantially the same.

The seated person 3 sits on the seating tool 39 in the following manner. That is, the seating person 3 is in a state where the corresponding portion P2 such as the coccyx touches the contact member 16 and the pair of ischial corresponding portions P1 are in contact with the upper surfaces of the pair of raised portions 43R and 43L. Sit at 39. As a result, when the seated person 3 normally sits on the seating tool 39, the pair of ischia of the seated person 3 is supported by the pair of raised portions 43R and 43L.

According to this modification, in addition to the effects described in the above embodiment, the following effects are exhibited. That is, in the above embodiment, the upper surfaces of the pair of ischial support members 6R and 6L each function as seat surfaces, but in this modified example, the upper surfaces of the pair of raised portions 43R and 43L each function as seat surfaces. As described above, the upper surfaces of the pair of raised portions 43R and 43L have an elongated shape in the left-right direction, and when the seated person 3 is seated, a narrower range of the buttocks is the seating surface as compared with the above embodiment. It will be in contact with. Therefore, the ischium can be accurately supported by the pair of raised portions 43R and 43L. Further, when the spine is bent, the posture of the seated person 3 is difficult to stabilize. Therefore, the seated person 3 can consciously or unconsciously stretch the back muscles to maintain the state in which an appropriate force is applied to the inner muscle, and the trunk can be trained more effectively.

As shown in FIG. 17, when the shape of the raised portion 43R of the ischial support member 41R is viewed from above, the width in the anteroposterior direction remains constant along the left and right along a virtual line passing through the center of the upper surface of the pillar portion 42R. The shape may extend in the direction. The same applies to the raised portion 43L of the ischial support member 41L.

Further, in this modification, the raised portions 43R and 43L are made of flexible members such as rubber members, and the pillar portions 42R and 42L are made of hard materials such as metal, plastic, carbon fiber and wood. It can be composed of. As a result, the connection with the through-hole forming member 10 can be firmly performed while reducing the load applied to the ischium.

Further, for other modified examples, a member corresponding to the raised portions 43R and 43L according to the present modified example may be provided.

<7th modification>
Next, a seventh modification of the above embodiment will be described. FIG. 18A is a top view of the seating tool 45 according to the seventh modification. FIG. 18B is a view of the seating tool 45 according to the seventh modification from the front side to the rear side of the seating tool 45. In the description of the seventh modification, the same elements as the elements of the sixth modification are designated by the same reference numerals, and the description thereof will be omitted.

The ischial support members 47R and 47L constituting the buttocks support member 46 of the seating tool 45 according to the present modification are different in shape from the ischial support members 41R and 41L according to the sixth modification. That is, focusing on the ischial support member 47R, the ischial support member 47R has a shape in which the columnar raised portion 48R is raised from the upper surface of the columnar column portion 42R. The diameter of the upper surface of the raised portion 48R is sufficiently smaller than the diameter of the upper surface of the pillar portion 42R, and the axis of the raised portion 48R is on the same axis as the axis of the pillar portion 42R. The ischial support member 47L includes a raised portion 48L having the same shape in the same manner as the ischial support member 47R.

The seated person 3 sits on the seating tool 45 in the following manner. That is, in the seated person 3, the corresponding portion P2 such as the coccyx touches the abutting member 16, the pair of ischial corresponding portions P1 contacts the upper surfaces of the pair of raised portions 48R and 48L, and the pair of ischia comes into contact with the pair of raised portions. The seat is seated on the ischial tool 45 so as to be supported by the 48R and 48L.

According to this modification, in addition to the effects described in the above embodiment, the following effects are exhibited. That is, in this modification, the upper surfaces of the pair of raised portions 48R and 48L each function as a seating surface. As is clear from the comparison between FIG. 16A and FIG. 18A, the seating surface of the present modified example is further smaller than the seating surface of the seating tool 39 according to the sixth modified example. Therefore, in order for the seated person 3 to sit on the seating tool 45 in a stable state, it is necessary for the seated person 3 to be in a state in which the pair of ischia bones are more firmly supported by the pair of raised portions 48R and 48L, and more firmly. It is necessary to stretch the back muscles, and the seated person 3 can be made to recognize or imagine that such a need is necessary. Therefore, the seated person 3 can consciously or unconsciously stretch the back muscles to maintain the state in which an appropriate force is applied to the inner muscle, and the trunk can be trained more effectively.

Regarding other modified examples, a member corresponding to the raised portions 48R and 48L according to the present modified example may be provided.

<8th modification>
Next, an eighth modification of the above embodiment will be described. FIG. 19 is a top view of the seating tool 50 according to the eighth modification. As is clear from the comparison between FIGS. 2 and 19, the through hole forming member 51 of the seating tool 50 according to the present modification does not include the right side surface member 11 and the left side surface member 12. The through-hole forming member 51 has a position X1 separated from the contact portion 7 by a certain amount along the back surface of the ischium support member 6R, and a position X2 separated from the contact portion 7 by a certain amount along the back surface of the ischium support member 6L. A rear surface member 52 that is interposed between the two and is curved so as to be convex toward the rear (the back side of the buttock support member 5) is provided. The through hole 53 is formed in a portion surrounded by a part of the back surface of the ischial support member 6R, a part of the back surface of the ischial bone support member 6L, and the posterior surface member 52. A contact portion having a surface in contact with the side surface of the ischium support member 6R is formed at the position X1 of the posterior surface member 52, and the ischium support member 6R is fixed to this contact portion to support the ischium. The member 6R is fixed to the rear surface member 52. Similarly, at the position X2 of the posterior surface member 52, a contact portion having a surface in contact with the side surface of the ischium support member 6L is formed, and the ischium support member 6L is fixed to this contact portion to form the ischium. The support member 6L is fixed to the rear surface member 52.

The posture when the seated person 3 is seated on the seating tool 50 and the relationship between the body of the seated person 3 and each member of the seating tool 50 are the same as those in the above embodiment. Play the effect of. As for other modifications, the through hole forming member 10 or the member corresponding to the through hole forming member 10 may be configured as in this modification.

<9th modification>
Next, a ninth modification of the above embodiment will be described. FIG. 20 (A) shows the right side through hole forming member 56R (corresponding to the “one-sided through hole forming portion” in the claims) and the left through hole forming member 56L (claims) of the seating tool 55 according to the present modification. It is a figure which looked at the state which disassembled (corresponding to the "other through hole forming part") of the seating tool 55 from the upper side to the lower side. FIG. 20B is a view of the seating tool 55 after connecting the right side through hole forming member 56R and the left side through hole forming member 56L by the method described later, as viewed from the upper side to the lower side of the seating tool 55. is there. In both FIGS. 20A and 20B, the contact member 16 is not shown.

In the above embodiment, the rear surface member 14 of the through hole forming member 10 is formed of a single plate, and the rear surface member 14, the right side surface member 11 and the left side surface member 12 are connected by a connecting means. Instead, the through-hole forming member 10 was integrally formed. On the other hand, in this modification, the through hole forming member 56 can be disassembled.

More specifically, as shown in FIG. 20 (A), the through hole forming member 56 is formed on the right side surface member 61R and the right rear surface member 57R connected to the right side surface member 61R (in the "one rear surface portion" of the claims). Right side through hole forming member 56R (corresponding to "one through hole forming portion" in the claims) and left side surface member 61L and left rear surface member 57L connected to the left side surface member 61L (claims). The left side through hole forming member 56L (corresponding to the "other through hole forming portion" in the claims) is connected and configured. The right rear surface member 57R corresponds to the right half portion of the rear surface member 14 of the above embodiment, and the left rear surface member 57L corresponds to the left half portion of the rear surface member 14 of the above embodiment.

The right side through hole forming member 56R and the left side through hole forming member 56L are connected as follows. That is, as shown in FIG. 20B, the left end of the right side member 11 and the right end of the left side member 12 are in contact with each other at the contact portion 7, and the tip of the right rear surface member 57R is in contact with the right end. The right side through hole forming member 56R and the left side through hole forming member 56L are positioned so that the portion and the tip end portion of the left side rear surface member 57L overlap at the overlapping portion 58. The right side through hole forming member 56R and the left side through hole forming member 56L each have the same shape, and the right rear surface member 57R and the left rear surface member 57L are each designed so that the overlapping portion 58 is formed. ..

Although not shown in each of the drawings of FIG. 20, screw holes are provided at overlapping positions in the overlapping portion 58 at the portions corresponding to the overlapping portions 58 of the right rear surface member 57R and the left rear surface member 57L. It is formed. A plurality of holes for screwing are provided at intervals in the vertical direction. Then, the shaft portion of the bolt 59 is inserted into each of the screwing holes from the outside, and the nut 60 is screwed from the inside, whereby the right side through hole forming member 56R and the left side through hole forming member 56L are connected. Will be done. Although not shown, the contact member 16 is attached to the upper part of the overlapping portion 58 after the connection.

According to this modification, the finished product has the same effect as that described in the above embodiment, and further has the following advantages in manufacturing the seating tool 55. That is, since the right side through hole forming member 56R and the left side through hole forming member 56L have the same shape as described above, when the through hole forming member 10 is manufactured, the right side through hole forming member 56R also has the left side through hole forming member 56L. A member having the same shape (this member is referred to as a "one-sided member" for convenience) may be manufactured. Since the one-side member is smaller than the through hole forming member 10 according to the above embodiment and has a simple structure, it is easier to manufacture than the through hole forming member 10 according to the above embodiment.

In particular, when the through hole forming member 56 is made of a wooden material, the following advantages in terms of ease of manufacture are obtained as compared with the case where the through hole forming member 10 according to the first embodiment is made of a wooden material. There is. That is, the rear surface member 14 according to the above embodiment is a single plate, and in manufacturing the seating tool 1, it is necessary to prepare a wooden material having a sufficient size as the rear surface member 14, and further cutting and bending. It is necessary to perform such processing. Further, according to the present modification, since the member corresponding to the rear surface member 14 according to the above embodiment is smaller than that of the first embodiment, the difficulty of preparing and processing the wooden material is reduced accordingly. Highly easy to manufacture.

In this modified example, the right side through hole forming member 56R and the left side through hole forming member 56L are connected by the overlapping portion 58 by using the bolt 59 and the nut 60, but the means of connection is exemplified. In addition to the connection using parts other than the bolt 59 and the nut 60, adhesion, welding, taping, or the like may be used.

Further, with respect to another modification, the through hole forming member 10 or the member corresponding to the through hole forming member 10 may be configured as in this modification. In particular, when the technique of this modification is applied to the seat 50 according to the eighth modification, the through hole forming member 62 of the seat 50 has the following configuration as shown in FIG. That is, the through hole forming member 51 is the right rear surface member 63R (corresponding to the “one rear surface portion” in the claims) corresponding to one half portion of the rear surface member 52, and the other of the rear surface member 52. The left rear surface member 63L (corresponding to the "other rear surface portion" in the claims) is connected and configured, and the right rear surface member 63R and the left rear surface member 63L have the same shape. Is.

<Other variants>
Next, another modification of the above embodiment will be described. In the following other modifications, for convenience of explanation, the same reference numerals are given to the elements having the same functions as those in the above embodiment.

In the above embodiment, the shape of the pair of ischial support members 6R and 6L of the buttock support member 5 is a cylinder. However, the shapes of the pair of ischial support members 6R and 6L do not have to be cylindrical, and may have the following shapes as an example. For example, as shown in FIG. 22 (A), the ischial support member 6 may be a columnar member whose cross section is a surface to which a part of circles having different curvatures are connected to a virtual line. Although not shown, the ischial support member 6 is a member having an elliptical cross section, a triangle (may be a rounded triangle), a quadrangle (may be a rounded quadrangle), or another polygonal columnar member. There may be. The above is the same for the first to ninth modifications.

Further, the buttocks support member 5 may be composed of a transparent member. The transparent member is, for example, glass or a transparent resin. According to this configuration, the seated person 3 recognizes the ground 2 visually recognized via the buttock support member 5, so that the ground 2 and the sky (universe) themselves (particularly, the spine extending upward from the sacrum). ) Can be more easily obtained, and the seated person 3 can be more effectively guided to the meditative state. The above is the same for the first to ninth modifications.

Further, the shape of the through hole forming member 10 is not limited to the shape described in the above embodiment. For example, as shown in FIG. 21B, the shape may be bent at one point in the central portion in the left-right direction so as to be convex toward the rear side of the buttocks support member 5. Further, as shown in FIG. 21C, the buttock support member 5 may have a shape bent at two points separated in the left-right direction so as to be convex toward the rear side.

Further, the through hole forming member 10 can have a structure that can be expanded and contracted in the vertical direction. By making it expandable and contractible, the seating tool 1 can be used as a stool chair as in the above embodiment, or as a sitting chair or a sitting chair as in the first modification, depending on the situation. be able to. In this case, a plurality of ischial support members 6 having different heights are prepared in advance, and the ischial support member 6 having an appropriate height is appropriately provided as the through hole forming member 10 according to the expansion and contraction state of the through hole forming member 10. It is necessary to set it in a proper position. As a means for making the through hole forming member 10 expandable and contractible, a known technique can be appropriately used. For example, a telescopic pipe structure, a lattice structure, a monocoque shell structure, a bellows structure and the like can be mentioned.

Further, the seating tool 1 may be provided with a member for enhancing the fixation of the buttocks of the seated person 3 and a member for assisting the seating such as a backrest.

Although the embodiments and modifications of the present invention have been described above, the above embodiments and modifications are merely examples of embodiment of the present invention, and thereby the present invention. The technical scope should not be construed in a limited way. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

1, 20, 24, 26, 30, 33, 39, 45, 50, 55 Seating tool 2 Ground 3 Seated person 5, 21, 27, 40, 46 Buttocks support member 6L, 6R, 22L, 22R, 28L, 28R, 41L, 41R, 47L, 47R Ischium support member 8,53 Through hole 10, 34, 51, 56, 62 Through hole forming member 11, 61R Right side member 12, 61L Left side member 14, 35, 52 Rear surface member (Rear surface)
16, 31 Contact member (contact part)
37 Buttocks covering part (buttock covering part)
43L, 43R, 48L, 48R Raised part 56R Right through hole forming member (one through hole forming part)
56L left through hole forming member (other through hole forming part)
57R, 63R Right rear surface member (one rear surface part)
57L, 63L Left rear surface member (the other rear surface part)

Claims (18)

1. The buttocks support part that supports the buttocks of the seated person when the seated person is seated, and the buttocks support part.
   On the rear side of the buttock support portion and on the lower side of the sacrum of the seated person who sits with the buttock portion supported by the buttock support portion, the vertical direction reaches the ground so that the ground can be seen when viewed from above. A through-hole forming portion that forms a through-hole extending to the
   A seating tool characterized by being equipped with.
2. A contact portion that is provided at a position facing the buttock support portion across the through hole and that contacts a portion corresponding to the coccyx or sacrum of the occupant who sits with the buttock supported by the buttock support portion. The seat according to claim 1, further comprising.
3. The seating tool according to claim 1, wherein the buttocks support portion includes a pair of ischial support portions that support the pair of ischial bones of the seated person when the seated person is seated.
4. One ischial support is a columnar member and is a columnar member.
   The buttock support portion is configured by arranging the side surfaces of the pair of ischial support portions side by side so as to come into contact with each other at the contact portion.
   When the seated person is seated, one ischium is supported by one ischial support, the other ischium is supported by the other ischial support, and the contact portion is located at the lateral center of the upper body of the seated person. The ischial tool according to claim 3, wherein is located.
5. This is provided at a position facing the contact portion with the through hole in between, and is seated in a state where the buttocks are supported by the buttocks support portion, and is in contact with a portion corresponding to the coccyx or sacrum of the seated person. The seating tool according to claim 4, further comprising a contact portion.
6. The through-hole forming portion has one side surface portion extending by a certain amount along the posterior surface of the one ischial support portion with the contact portion as the proximal end portion, and the other side portion with the contact portion as the proximal end portion. An intervening between the other side surface portion extending by a certain amount along the posterior side surface of the ischial support portion and the tip portion of the one side surface portion and the tip portion of the other side surface portion of the buttock support portion. It is provided with a rear surface portion that is curved or bent so as to be convex toward the rear side.
   The seating tool according to claim 4, wherein the through hole is formed in a portion surrounded by the one side surface portion, the other side surface portion, and the rear surface portion.
7. The posterior surface portion is further provided with a contact portion that is provided at a position facing the contact portion and that contacts a portion corresponding to the coccyx or sacrum of the seated person who is seated with the buttocks supported by the buttocks support portion. The seat according to claim 6, wherein the seating tool is characterized by the above.
8. The through hole forming portion is
   A one-sided hole forming portion connected to the one side surface portion and having one rear surface portion corresponding to one half portion in the left-right direction of the rear surface portion, and the other side surface portion. The other through hole forming portion which is connected to the other side surface portion and has the other rear surface portion corresponding to the other half portion in the left-right direction of the rear surface portion is connected and configured.
   The seating tool according to claim 6 or 7, wherein the one-through hole forming portion and the other through-hole forming portion have the same shape.
9. The through-hole forming portion is located at a position separated from the contact portion by a certain amount along the posterior surface of the one ischial support portion and along the posterior surface of the other ischial support portion from the contact portion. It is provided with a rear surface portion that is interposed between the positions separated by a certain amount and is curved or bent so as to be convex toward the rear side of the buttock support portion.
   The through hole is formed in a portion surrounded by a part of the posterior surface of the one ischial support portion, a part of the posterior surface of the other ischial support portion, and the posterior surface portion. The ischial tool according to claim 4.
10. The posterior surface portion is further provided with a contact portion that is provided at a position facing the contact portion and that contacts a portion corresponding to the coccyx or sacrum of the seated person who sits with the buttocks supported by the buttocks support portion. The seat according to claim 9.
11. The through hole forming portion is
    On the other hand, the rear surface portion corresponding to one half of the rear surface portion in the left-right direction, and
    The other rear surface portion corresponding to the other half portion in the left-right direction of the rear surface portion is connected and configured.
    The seating tool according to claim 9 or 10, wherein the one rear surface portion and the other rear surface portion have the same shape.
12. One ischial support portion includes a columnar pillar portion and a raised portion raised from the upper surface of the pillar portion.
    When the seated person is seated, one ischium is supported by the raised portion of the one ischial support portion, and the other ischial bone is supported by the raised portion of the other ischial support portion. The ischial tool according to any one of claims 4 to 11.
13. The seating tool according to claim 12, wherein the raised portion extends in the left-right direction through the central portion of the upper surface of the pillar portion when viewed from above.
14. The seating tool according to claim 12, wherein the raised portion is a columnar member raised from the upper surface of the pillar portion.
15. A buttocks covering portion that is behind the through hole and is provided at a position avoiding the through hole when viewed from above and covers the buttocks of the seated person so as to wrap the buttocks from behind when the seated person is seated. The seat according to any one of claims 1 to 14, further comprising.
16. The buttocks covering portion extends on the rear side of the buttocks of the seated person so that the arc of the cross section becomes smaller in length while maintaining the left-right symmetry of the cross section toward the upper side. The seating tool according to claim 15, which is characterized.
17. The seating tool according to claim 15 or 16, wherein the buttocks covering portion is removable.
18. The seating tool according to any one of claims 1 to 17, wherein the buttocks support portion is made of a transparent member.

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