JP2011156279A - Sitting toilet seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet seat allowing a user to assume a posture in which the curvature of the rectum is eased and it is easy to defecate when sitting on the toilet seat. <P>SOLUTION: The sitting toilet seat 241 includes a support 3 for supporting the body of a user, and a front inclined surface part 27 provided on the upper surface of the support and at a position to be in contact with the buttocks of the user when the user sits and rotating the pelvis in the direction of moving the pelvis upper side of the user forward. In the front inclined surface part, the front side is lowered, and while the user sits on the front inclined surface part and the front inclined surface part and the buttocks of the user are brought into contact with each other, the inner side tissue of the buttocks slides down along the front inclined surface part by the component force in parallel with the front inclined surface part of gravity acting on the user, and thus, the skin of the buttocks of the user is pulled up to the rear by the front inclined surface part and the pelvis is consequently rotated. The sitting toilet seat further includes a leg opening suppression part 243 for suppressing leg opening when the user sits. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sitting toilet seat.

  The sitting toilet seat provided above the toilet bowl is usually provided with an opening in the center for dropping excrement into the toilet bowl, and has a support that supports the user's body so as to surround it. is doing. In the past, various developments have been carried out for the purpose of improving comfort for such a seat. For example, a device for improving the sitting comfort as one of the comforts has been devised, and one of them is the toilet seat disclosed in Patent Document 1. In such a toilet seat, the inner edge of the toilet seat has an oval shape, and the seat surface is made wider than that of the existing toilet seat. Thereby, the surface which supports a buttock supports most of the weight concerning a buttock with the surface just under a sciatic nodal point, and provides the stable seating comfort without the depression of a buttock.

  As a part of improving comfort, the present inventors have conducted research on improvement of defecation such that the user can excrete more smoothly. And as a result of repeated studies, it has been found that the conventional posture of the seated user tends to be a posture in which the rectum is curved in the toilet seat so far, which reduces the defecation. I came. Toilet seats that have been improved from this point of view are not found in conventional toilet seats, including those disclosed in Patent Document 1.

JP-A-8-117147

  The present invention has been made in view of the above, and an object of the present invention is to provide a toilet seat that is easy to defecate and has a reduced rectal curvature when seated on the toilet seat.

  In order to solve the above-described problems, the present invention is a sitting toilet seat that is used by being placed on a toilet, and is a support that supports a user's body around an opening from which excrement falls. The upper surface of the support body is provided at a position that comes into contact with the user's buttocks when the user is seated, and is a front inclined surface portion that rotates the pelvis in a direction in which the upper part of the user's pelvis moves forward, The front side is lowered, the user sits on the front inclined surface portion, and the front inclined surface portion and the user's buttocks contact, while the inner side tissue of the buttocks is above the gravity acting on the user A configuration in which the pelvis is rotated by sliding downward along the front inclined surface portion by a component force parallel to the front inclined surface portion, whereby the skin of the user's buttocks is pulled up backward by the front inclined surface portion. The above-mentioned front inclined surface When, and a suppressing open leg suppressing portion open leg when the user sits. When the user sits on the front inclined surface portion, the internal structure of the user's buttocks slides downward along the front inclined surface portion due to the force parallel to the front inclined surface portion of gravity acting on the user, while the A frictional force from the front inclined surface acts on the skin. By such an action, the pelvis is given a rotational force that moves the upper part of the pelvis forward, and the pelvis is rotated so as to rise in the forward rotation direction. Moreover, a user's leg opening is suppressed by the leg opening suppression part.

  According to the present invention configured as described above, by suppressing the user's open leg and maintaining the relaxation of the muscle group that applies tensile force to the lower pelvis side, the pelvis is easily raised in the forward rotation direction, It is possible to obtain a posture that facilitates defecation with a reduced rectal curvature.

  Preferably, the spread leg restraining portion includes a pair of restraining concave grooves extending in a C shape in plan view so that the distance increases toward the front of the support body, and the thigh portion corresponds to the restraint described above. By being dropped into the concave groove, the thigh is configured to be restrained from opening from the side. The thighs of each leg of the user are fitted in the corresponding suppression grooves, and each thigh itself is configured to be difficult to move in the left-right direction.

  According to the present invention configured as described above, it is possible to directly prevent the movement of the individual thighs in the left-right direction and to suppress the user's leg opening. In addition, the contact area with the toilet seat has been expanded to the side of each thigh, allowing the user to more reliably apply the frictional force and further rotate the pelvis due to the frictional force and gravity force. Make sure.

  Preferably, the support has a seat surface lowermost forming portion including the lowest portion of the seat surface in front of the front inclined surface portion, and the restraining grooves are respectively formed on the seat surface lowermost portion. It is comprised so that it may be provided in the vicinity of a part.

  According to the present invention configured as described above, since the suppression groove is closer to the pelvis, the frictional force to the user due to the suppression groove can also be applied from closer to the pelvis. The frictional force and the gravitational force can function efficiently to rotate the pelvis.

  Preferably, each of the suppression grooves includes an inner slope located near the center of the support body and an outer slope located near the left and right outer sides of the support body. It is comprised so that it may become smaller than the inclination of an outer slope. That the slope of the inner slope of the suppression groove is smaller than the slope of the outer slope, when viewed macroscopically, the suppression groove is inclined from the outside of the support toward the center (opening). Thereby, each of the left and right thighs receives a rotational force in such a direction as to perform an internal rotation motion that falls toward the opening. And when a rotational force acting in the direction of internal rotation is applied to the femur around its axis, the actual femur is constrained to turning motion by connecting its front end to the knee. In particular, it appears as a closed leg movement of the thigh that moves in the direction in which the left and right knees approach. Therefore, the relaxation of the muscle group between the thigh and the pelvis is easily maintained.

  According to the present invention configured as described above, a leg closing motion of the thigh that moves in a direction in which the left and right knees approach each other is promoted, the relaxation of the muscle group is easily maintained, and the pelvis rises more. The advantage of being easy is obtained.

  Preferably, each of the restraining concave grooves includes an inner slope located closer to the center of the support and an outer slope located closer to the left and right outer sides of the support. It becomes smaller as going forward in the extension direction. Since the inclination of the outer inclined surface of the restraining groove is configured to become smaller toward the front, it is possible to avoid pressing the portion closer to the front of the user's thigh.

  There is a possibility that the front part of the thigh may be compressed. According to the present invention configured in this way, the slope of the outer slope becomes smaller toward the front, so that the part close to the pelvis of the thigh Then, while obtaining the effect of promoting the rise of the pelvis by suppressing the leg opening, it is possible to avoid the compression and reduce the burden on the user in the front portion where the effect on the promotion effect is small.

  Preferably, the leg opening suppressing portion is further configured to further include a flat surface extending in the horizontal direction further toward the center and forward of the support slope than the inner slope of the suppression groove. In the support body, the lower portion of the front portion of the user's thigh has a flat surface, so that the front portion of the user's thigh is prevented from being compressed.

  Where the front part of the thigh may be compressed, according to the present invention configured as described above, a flat surface extending in the horizontal direction is provided further toward the center of the support body and forward than the inner slope. Therefore, in the area close to the pelvis of the thigh, the effect of promoting the rise of the pelvis due to the suppression of open legs is obtained, while in the front part where the effect on the acceleration effect is small, compression is avoided and the burden on the user is reduced. Can do.

According to the above-described present invention, it is possible to provide a toilet seat that is easy to defecate when the seat is seated on the toilet seat.
The other features of the present invention and the operational effects thereof will be described in more detail with reference to the accompanying drawings.

1 is a plan view of a seat for toilet seat according to a first embodiment of the present invention. It is a perspective view of the seat seat of FIG. It is a figure which shows the shape of the sitting toilet seat which concerns on 1st Embodiment in the cross section of the front-back direction. It is a figure which shows the shape of the sitting toilet seat which concerns on 1st Embodiment in the cross section of the left-right direction. It is a figure which shows the ridgeline in a sitting toilet seat. It is a figure which shows the relationship between defecation property and a pelvis and a rectum. It is a figure explaining the function of a pelvis rotation part. It is a figure which shows the plane and front-back direction cross section of the sitting toilet seat which concern on the modification of 1st Embodiment. It is a side view of the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on the modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the plane and front-back direction cross section of the seat seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on another modification of 2nd Embodiment. It is a figure which shows the sitting toilet seat which concerns on 3rd Embodiment. It is a figure which shows the sitting toilet seat which concerns on the modification of 3rd Embodiment. It is a figure which shows the sitting toilet seat which concerns on 4th Embodiment. It is a figure which shows the relationship between the open leg of a thigh and the posterior inclination of a pelvis. It is a figure which shows the influence which leg opening suppression of a thigh has on a pelvis. It is a figure which shows the turning motion of a femur. It is a figure which shows the sitting toilet seat which concerns on the modification of 4th Embodiment. It is a figure which shows the positional relationship of a user's seated buttocks and thighs, and a support body. It is a figure which shows the sitting toilet seat which concerns on another modification of 4th Embodiment. It is a figure which shows the plane and front-back direction cross section of the seat which concerns on 5th Embodiment. It is a figure which shows the plane and front-back direction cross section of the seat seat which concerns on embodiment which concerns on the modification of 5th Embodiment. It is a figure which shows the plane and front-back direction cross section of the sitting toilet seat which concern on another modification of 5th Embodiment.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

First embodiment.
As a first embodiment, a sitting toilet seat that includes a pelvic rotating portion and thereby realizes a posture that facilitates defecation with a reduced rectal curvature when seated on the toilet seat will be described. FIGS. 1 and 2 are a plan view and a perspective view, respectively, of the entire seat for toilet seat according to the present embodiment. In the present specification and claims, the direction-related description includes “front” on the lower side of the page, “rear” on the upper side of the page, “left” on the left side of the page, “right” on the right side of the page, and front side of the page. Is performed based on the relationship of “upper” and “bottom” of the back side of the paper.

  The sitting toilet seat 1 according to the present embodiment is used by being placed on a toilet bowl (not shown), and includes a support 3 and a pelvis rotating unit 5. The support 3 supports the user's body and is configured to surround an opening 7 that allows excretion to fall into a toilet (not shown). In the present embodiment, the support body 3 is an annular member, but may be configured in other forms such as a C-shape with a front portion interrupted. At the rear part of the support 3, there is provided a rotation support portion 9 that supports the seat 1 so that the seat 1 can be raised and lowered with respect to the toilet in a swinging manner. Moreover, the support body 3 is comprised by the left-right symmetric shape.

  FIGS. 3 and 4 are views showing the shape of the sitting toilet seat according to the present embodiment in a front-rear direction cross section and a left-right direction cross section, respectively. FIG. 3 shows four cross-sections in the front-rear direction, that is, cross-sections in the front-rear direction at positions 110 mm, 130 mm, 150 mm, and 170 mm away from the left-right centerline CL of the seat 1. As shown in these longitudinal sections, the support 3 of the seat 1 has a shape in which the front half has a relatively small height difference and is inclined forward so that the rear half is at a higher position. It has a shape.

  FIG. 4 shows a cross section in the left-right direction at a position 40 mm backward and 17.3 mm (−17.3 mm) and 40 mm (−40 mm) away from the opening maximum width forming portion 13 in the front-rear center. The opening maximum width forming portion 13 is a portion of a left-right extension line that includes a portion in which the width in the left-right direction related to the opening 7 is maximized when the sitting toilet seat is projected from above. As shown in the cross section in the left-right direction of FIG. 4, the support 3 has a top surface 19 positioned downward as viewed from the outer edge 15 to the inner edge 17, that is, an upper surface 19 positioned below the opening 7. Have Curves 21 and 23 are formed at the upper portions of the outer edge 15 and the inner edge 17, respectively. In addition, since the aforementioned maximum opening width forming portion 13 is a portion determined with respect to the opening width as viewed from above, in the present embodiment, due to the presence of the curve 23, the maximum opening width forming portion 13 is The distance V between the lower portions of the left and right inner edges 17 is determined to be the widest. Furthermore, the support body 3 has a seating surface lowermost forming portion 25. Here, the seating surface lowermost part formation part of this invention is demonstrated using FIG. FIG. 5 is a diagram showing a ridge line in a seat on the seat, and (b) is a cross-sectional view in the front-rear direction along the reference numeral 305 in (a). As described above, the support 3 includes the flat upper surface 19 and the curve 23 at the end on the inner edge 17 side. And the ridgeline L as shown in FIG. 5 can be derived | led-out by connecting the connection point P of the upper surface 19 and the curve 23 in the cross section radially extended from the center of the opening 7. FIG. And the seat surface lowermost part formation part 25 is a part of the left-right extension line which contains the lowest site | part of the ridgeline L. As shown in FIG.

The pelvic rotating part 5 is located on the upper surface of the rear side of the support 3 and is a part that comes into contact with the user's buttocks when the user is seated. The user's pelvis is rotated with the side moving forward. The pelvis rotating part 5 includes a front inclined surface part 27, and the weight of the user seated on the sitting toilet seat 1 is mainly supported by the front inclined surface part 27. The front inclined surface portion 27 is a hatched region in FIG. 3 and is provided on the upper surface of the support 3 at a position where it comes into contact with the user's buttocks when the user is seated, and is inclined forward so that the front side is lowered. Configured.
As shown in FIG. 3, the front inclined surface portion 27 is immediately behind the seat surface lowermost portion forming portion 25, and the maximum opening width forming portion 13 is located in the middle of the front inclined surface portion 27. Further, in FIG. 3, a line indicating the upper surface of the support body of an existing toilet seat is indicated by reference Z for reference. As can be seen from this reference line Z, on the upper surface of the support of the existing toilet seat, the region immediately behind the seat surface lowermost forming portion is almost horizontal. On the other hand, on the upper surface of the support body of the present invention, the front inclined surface portion 27, which is a region that contacts the user's buttocks and supports the buttocks, is formed so as to rise higher toward the rear.
In the present embodiment, the seat surface lowermost forming portion 25 is positioned at a portion of about 238 mm from the front end of the support 3 with respect to the front and rear length of about 414 mm and the left and right length of about 393 mm. . Further, the front inclined surface portion 27 is formed over a region of about 77 mm in the front-rear direction, immediately behind the seat surface lowermost portion forming portion 25.

  Next, the operation of the sitting toilet seat according to the present embodiment having such a configuration will be described. The present invention is intended to reduce the rectal curvature of the user in order to improve defecation. Therefore, the present inventor focused on the relationship between defecation and the pelvis and rectum, and further focused on the pelvis as a specific means for reducing the curvature. FIGS. 6A and 6B are views showing the relationship between the posture of the user and the pelvis and rectum, respectively. As shown in FIG. 6 (a), the user 31 sitting on the sitting toilet seat normally takes a natural and easy posture with his upper body raised. However, in this natural posture, the pelvis 33 tilts backward and a force acts on the rectum 37 through the pubic rectal muscle 35, and the rectum 37 is curved as shown in FIG. . Therefore, if a natural posture is taken in a conventional seat, the defecation is deteriorated. On the other hand, according to the study by the present inventor, when the pelvis 33 is rotated in the forward direction with respect to the state of FIG. The force exerted on the body is reduced, and the curvature of the rectum 37 is relaxed. As a result, defecation is improved. However, in order to make the pelvis 33 easy to defecate in the conventional toilet seat, as shown in FIG. 6 (b), the seated user 31 is cramped and unnatural with the upper body tilted forward. Forced to take a special attitude.

The sitting toilet seat of the present invention is made in view of the above, and according to the sitting toilet seat of the present invention, the pelvis was rotated in the forward rotation direction even when the user took a posture of sitting naturally on the toilet seat. The state shown in FIG. For this reason, curvature of the rectum can be relaxed while taking a natural posture, and defecation is improved.
FIG. 7 is a diagram for explaining the function of the pelvis rotating unit according to the present invention. A front inclined surface portion 27 is provided on the upper surface of the support 3 at a position where the user is seated. When the user sits on the front inclined surface portion 27, first, the user's collar 39 and the front inclined surface portion 27 are in a positional relationship indicated by a dotted line in FIG. Next, when the user puts his / her weight on the front inclined surface portion 27 of the support body 3, the downwardly inclined gravity M according to the body weight is supported by the front inclined surface portion 27. The gravity M can be decomposed into a component force a parallel to the front inclined surface portion 27 and a vertical component force (not shown) orthogonal to the front inclined surface portion 27, and the user's body can move the front inclined surface portion in the gravity M. 27, the component force a parallel to 27 tends to slide down along the slope of the front inclined surface portion 27. Furthermore, against such slip-off, the skin contacting the front inclined surface portion 27 of the user's buttocks 39 has a frictional force caused by a vertical component force (not shown) perpendicular to the front inclined surface portion 27 in the gravity M. d acts upward of the slope of the front inclined surface portion 27. By the action of the component force a and the frictional force d, in the user's body, the internal tissue inside the skin of the buttocks 39 tends to slide down along the front inclined surface portion 27 by the component force a of gravity M. On the other hand, the skin of the heel part 39 stays on the front inclined surface part 27 by the frictional force d with the front inclined surface part 27, and the user's heel part 39 settles to the position shown by the solid line in FIG. This is equivalent to receiving a force that causes the skin of the buttocks to be pulled backward by the frictional force between the user and the front inclined surface portion 27 when viewed from the user's buttocks (inside tissue). The user's pelvis 33 is rotated forward by force as shown by a solid line in FIG. Objectively, as shown in FIG. 7, the internal structure of the heel part 39 slips downward along the front inclined surface part 27 by the component force a, and the skin of the heel part 39 is inclined forward by the frictional force d. It remains on the surface portion 27. As the internal tissue, the femur and the pelvis 33 connected to the femur and the tissue surrounding them move downward, but the lower part of the pelvis 33 is close to the skin of the hip 39 that remains on the front inclined surface portion 27 by the frictional force d. The movement of the inner side tissues brings the pelvis 33 with a rotational force T in a direction to move the upper part of the pelvis forward. As a result, the pelvis 33 rotates from the dotted line state to the solid line state in FIG. 7, that is, rises in the forward rotation direction.

  As described above, in the present embodiment, the user 31 simply sits on the front inclined surface portion 27, and as shown in FIG. 6B, the user 31 moves the pelvis 33 in the natural posture without taking the forward inclined posture. A posture that can be rotated to stand up in the rolling direction and has good defecation properties, that is, a posture that facilitates defecation in which the force exerted by the pubic rectal muscle 35 on the rectum 37 is reduced and the curvature of the rectum 37 is relaxed is obtained. be able to.

  A modification of the first embodiment described above will be described with reference to FIG. FIG. 8 shows a plane and a cross section in the front-rear direction of a sitting toilet seat according to this modification. (B) is the front-back direction cross section which followed the code | symbol 308 of (a). A sitting toilet seat 51 according to this modification includes a slip-off reduction unit 53. When the internal tissue of the buttocks 39 slides downward along the front inclined surface portion 27 due to the component force parallel to the front inclined surface portion 27 of gravity acting on the user, the slip-off reducing portion 53 moves to the user's thigh. This is a portion configured to contact the back surface of the thigh and provide resistance to slipping of the thigh, and is provided in front of the pelvis rotating unit 5. The sliding reduction part 53 includes a rear inclined surface part 55 whose front side becomes higher. The rear inclined surface portion 55 is provided in front of the front inclined surface portion 27 so as to sandwich the seat surface lowermost portion forming portion 25 with the front inclined surface portion 27. Although not limited, as an example, the inclination of the rear inclined surface portion 55 may be set to be smaller than the inclination of the front inclined surface portion 27 as shown in FIG.

  Also in such a sitting toilet seat 51, by providing the pelvic rotating unit 5 including the front inclined surface portion 27, when seated, the user's pelvis rises in the forward rotation direction as in the sitting toilet seat 1 of FIGS. It is possible to obtain a posture that facilitates defecation with a relaxed rectal curvature. In addition to this, the following effects are also obtained in this modification. First, as described above, by sitting on the front inclined surface portion 27, the internal tissue inside the skin of the buttocks slides downward along the front inclined surface portion 27 due to the force a of gravity M. Here, when the user's thigh is greatly slipped, there is a possibility that the skin of the user's buttocks in contact with the front inclined surface portion 27 may be greatly slipped. On the other hand, in this modification, the slip-off reducing unit 53 comes into contact with the back surface of the user's thigh and provides resistance to the forward movement of the thigh. Thus, the rotational force T for forward rotation due to the above-described component force a and frictional force d of the gravity M works firmly on the pelvis. Further, since the rear inclined surface portion 55 is provided immediately in front of the front inclined surface portion 27, that is, provided near the pelvis, the aforementioned rotational force T can be applied to the pelvis more accurately. In addition, if the inclination of the rear inclined surface portion is too large, the user's knee may be raised too much, and the effect of promoting the forward rotation of the pelvis by the front inclined surface portion may be reduced. By making the inclination of the lower than the inclination of the front inclined surface portion 27, it is possible to avoid a decrease in the effect of promoting the forward rotation of the pelvis while suppressing a large drop of the thigh.

  Based on FIG. 9, yet another modification of the first embodiment will be described. FIGS. 9A and 9B are side views of a sitting toilet seat according to this modification. The sitting toilet seat 61 according to this modification includes a seating pretilt mechanism 63 in FIG. 9A or a seating pretilt mechanism 65 in FIG. 9B. The seating forward tilt mechanisms 63 and 65 change the posture of the support 3 so that the entire support 3 tilts forward with respect to the toilet bowl when the user's weight is applied to the support 3 at the time of sitting. More specifically, the seating forward tilt mechanism 63 of (a) is composed of an elastic member provided on the bottom surface of the support body 3 of the sitting toilet seat 61 as a leg portion. Further, the seating forward tilting mechanism 65 of (b) is composed of at least two pairs of front and rear elastic members provided on the bottom surface of the support 3 of the sitting toilet seat 61 as leg portions. In the elastic member of the seating forward tilt mechanism 65, the elastic member provided on the rear side has a relationship that the elastic modulus is higher than that of the elastic member provided on the front side.

  Also in such a sitting toilet seat 61, by providing the pelvic rotating unit 5 including the front inclined surface portion 27, the user's pelvis rises in the forward rotation direction when seated, similar to the sitting toilet seat 1 of FIGS. 1 to 7. It is possible to obtain a posture that facilitates defecation with a relaxed rectal curvature. In addition, in this modified example, the seat surface tilts forward during the seating movement by the seating forward tilt mechanisms 63 and 65, so that the user is additionally given a sliding action, and the pelvis is rotated more reliably. Can be urged. Further, even when the sliding action is insufficient when seated, the seating surface is further tilted forward when the body weight is applied, so that the sliding action can be obtained more reliably.

Second embodiment.
As a second embodiment, a sitting toilet seat provided with a seating position guiding portion, and thereby a user is prompted to sit on a front inclined surface portion that rotates the pelvis will be described. FIG. 10 is a plan view of a sitting toilet seat according to the second embodiment. The sitting toilet seat 71 includes the support 3, the front inclined surface portion 27, and a seating position guiding portion 73 that guides the seating on the front inclined surface portion 27.

  The support body 3 is provided in front of the front inclined surface portion 27 and includes a seat surface lowermost portion forming portion 25 including the lowest portion of the seat surface, and an opening maximum width formation that forms a position where the width of the opening 7 is maximized in plan view. Part 13. The seating position guiding portion 73 is a means having a function of guiding seating on the front inclined surface portion 27. The seating position guide part 73 has an element which can be visually recognized as one aspect, and visually guides the user's seating position to the front inclined surface part 27. In the present embodiment, the seating position guiding portion 73 includes the maximum opening width forming portion 13 provided in the range of the front inclined surface portion 27 and formed at the rear of the seating surface lowest portion forming portion 25.

  In such a sitting toilet seat 71, seating on the front inclined surface portion 27 is guided and seated on the front inclined surface portion 27, whereby the pelvis is rotated in the forward rotation direction to stand up, and the bowel of the rectum is eased to facilitate defecation. You can get a posture. In particular, the seating position guiding unit 73 has a visually recognizable element. Therefore, the user uses the fact that the user views the toilet seat once before sitting, and the visual information is included in the visual information included in the determination of the seating position. Thus, the seating position can be guided. In addition, the seating position guiding portion 73 according to the present embodiment is not at the position where the opening is as described above. The large formation portion 13 is provided, and the user is encouraged to sit on the maximum opening width formation portion 13 by utilizing the habit of the user who is going to sit on the largest opening portion of the toilet seat, that is, to the front inclined surface portion 27. Can be seated.

A modification of the second embodiment will be described with reference to FIG. FIG. 11 is a plan view of a sitting toilet seat according to this modification. The sitting toilet seat 81 includes the support 3, a front inclined surface portion 27 provided on the upper surface of the support, and a seating position guiding portion 83 that guides the seating on the front inclined surface portion 27. The support 3 has a support maximum width forming portion 85. The support maximum width forming portion 85 is a position in the support 3 where the width between the inner edge 17 and the outer edge 15 facing the opening 7 is maximized, and is formed behind the front inclined surface portion 27. As described above, when the curves 21 and 23 are formed in the upper portions of the outer edge 15 and the inner edge 17 of the support 3, the support maximum width forming portion 85 has a lower portion width in the support 3. Determined in the widest place.
As described above, the seating position guiding portion 83 is configured by the support body maximum width forming portion 85 formed at the rear of the seat surface lowermost portion forming portion 25 and the front inclined surface portion 27.

  In such a sitting toilet seat 81, if it is seated on the seat surface lowermost forming portion 25 in the vicinity of the lower portion of the front inclined surface portion 27, a sliding action cannot be obtained. Using the habit, it is possible to guide the user to sit down and seat on the front inclined surface portion 27 with the support maximum width forming portion 85 as a target.

  Based on FIG. 12, still another modification of the second embodiment will be described. FIG. 12 is a plan view of a sitting toilet seat according to this modification. The sitting toilet seat 91 includes the support 3, the front inclined surface portion 27, and a seating position guiding portion 93 that guides the seating on the front inclined surface portion 27. In the present modification, the seating position guiding portion 93 includes a seating marker 95 provided on the front inclined surface portion 27. The seating marker 95 is not particularly limited as long as it functions as a mark. For example, the seating marker 95 can be configured as a portion having a color different from that of the support 3. In the sitting toilet seat 91, the seating position can be made conscious by the mark, and the seating on the front inclined surface portion 27 can be guided.

  Based on FIG. 13, yet another modification of the second embodiment will be described. FIG. 13 shows a cross section extending in the radial direction from the opening with respect to the seat on the seat according to this modification. (B), (c), and (d) are radial sections along the reference numerals 313, 413, and 513 of (a), respectively. The sitting toilet seat 101 includes a support 3, a front inclined surface portion 27, and a seating position guiding portion 103 that guides seating on the front inclined surface portion 27. The seating position guiding portion 103 is a means having a function of guiding the seating on the front inclined surface portion 27 and has a visually recognizable element.

  In this modified example, the seating position guiding portion 103 reduces the feeling of difficulty in sitting on the front inclined surface portion 27 and weakens the presence of the front inclined surface portion 27 in the front-rear direction. Specifically, the seating position guiding portion 103 includes a concave surface 105 that is provided at the rear portion of the toilet seat and rises so as to wrap around the heel portion. As shown in the radial cross section of FIG. 13, the concave surface 105 is provided on the left and right sides of the opening 7 on the upper surface of the support 3, and a part of the concave surface 105 is provided so as to overlap the front inclined surface portion 27. It has a shape that the buttock is wrapped.

  In such a sitting toilet seat 101, by reducing the impression that the front inclined surface portion is difficult to sit down, it is possible to reduce resistance related to the seating on the front inclined surface portion, and not to be aware of the inclination of the front inclined surface portion in the front-rear direction. By doing so, the resistance related to the seating on the front inclined surface portion 27 can be reduced. Further, the seating position guiding portion 103 is provided with a concave surface 105 that rises so as to wrap around the buttock, so that the user can visually recognize a shape that wraps around the buttock, and a user who wants to sit there from a sense of stability and calmness. Using the habit, the sitting position can be guided to the front inclined surface portion 27.

  Based on FIG. 14, still another modification of the second embodiment will be described. FIG. 14 is a diagram illustrating a plane of a seat for toilet seat according to the present modification and a cross section in the front-rear direction thereof. (B) is a front-back direction cross section along the reference numeral 314 of (a). The sitting toilet seat 111 includes the support 3, a front inclined surface portion 27, and a seating position guiding portion 113 that guides the seating on the front inclined surface portion 27. In the present modification, the seating position guide portion 113 includes a rear steep slope portion 115. The rear steep slope 115 is provided behind the front inclined surface 27 as shown in FIG. The opening maximum width forming portion 13 is located behind the seat surface lowermost forming portion 25, and the seat surface lowermost forming portion 25 is provided in front of the front inclined surface portion 27. Further, the inclination θ1 of the rear steep slope 115 is set to be larger than the inclination θ2 of the front inclined surface 27. As an example, the inclination θ1 is set to about 28 degrees and the inclination θ2 is set to about 14 degrees.

  In such a sitting toilet seat 111, by making the user aware of the rear steep slope 115 which is a steeper slope than the front sloping face 27, the reflection effect is weakened, and the awareness of the front sloping face 27 is inclined in the front-rear direction, The resistance related to the seating on the front inclined surface portion 27 before the rear steep slope portion 115 can be reduced. Thereby, the seating on the front inclined surface portion 27 can be guided.

  Based on FIG. 15, still another modification of the second embodiment will be described. (A) of FIG. 15 is a plan view of a seat on the seat according to the present modification, (b) is a perspective view thereof, and (c) and (d) are (a) and (b), respectively. It is the cross section in the left-right direction and the cross section in the front-rear direction along the reference numerals 315 and 415. The sitting toilet seat 121 includes the support 3, the front inclined surface portion 27, and a seating position guiding portion 123 that guides the seating on the front inclined surface portion 27. In this modification, the front inclined surface portion 27 not only inclines forward, but also in the left-right direction as shown in FIG. 15, and includes a front-rear direction inclined surface 27a and a left-right direction inclined surface 27b. In this modified example, the seating position guiding portion 123 includes a left-right direction inclined surface 27b, and the inclination θ4 of the left-right direction inclined surface 27b is set to be larger than the inclination θ3 of the front-rear direction inclined surface 27a.

  In such a sitting toilet seat 121, by making the user aware of the inclination of the front inclined surface portion 27 in the left-right direction, as a reflective effect, the awareness of the front inclined surface portion in the front-rear direction is weakened. Resistance to sitting can be reduced. Thereby, the seating on the front inclined surface portion 27 can be guided.

  A further modification of the second embodiment will be described with reference to FIG. FIG. 16 is a view showing a plane and a front-rear direction cross section of a seat seat according to the present modification, and (b) is a front-rear direction cross section along the reference numeral 316 of (a). The sitting toilet seat 131 includes a support 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and a seating position guiding portion 133 that guides seating on the front inclined surface portion 27. With. The seating position guide part 133 is a means having a function of guiding the seating on the front inclined surface part 27 and has a visible element.

  In the present modification, the seating position guiding part 133 emphasizes the difficulty of sitting on the seating surface lowermost forming part 25, and specifically includes a front steep slope part 135. As shown in FIG. 16, the front steep slope 135 is provided between the lowermost bearing surface forming portion 25 and the front slope 27 and is a slope with a forward slope with a lower front side. Further, the front-back slope of the front steep slope 135 is set to be larger than the front-back slope of the front sloped surface 27.

  In such a sitting toilet seat 131, the user who tries to sit at a lower part of the toilet seat has an impression that the seat surface lowermost portion forming portion 25 is difficult to sit, and induces the user to sit on the front inclined surface portion 27. Can do. In addition, the seating position guide part 133 is provided with a front steep slope part 135 between the seat surface lowermost part forming part 25 and the front sloped surface part 27, thereby utilizing the user's habit of trying to sit on a flatter part. Thus, it is possible to give an impression that the seat surface lowermost forming portion 25 located at a position where the front inclined surface portion 27 is suddenly dropped is less likely to be seated, and to guide the seating on the front inclined surface portion 27.

  Based on FIG. 17, still another modification of the second embodiment will be described. FIG. 17 is a view showing a plane of a seat for toilet seat according to this modification and a cross section in the front-rear direction, and FIG. The sitting toilet seat 141 includes a support 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and a seating position guiding portion 143 that guides seating on the front inclined surface portion 27. With. In the present modification, the seating position guiding portion 143 includes a rearward inclined portion 145 that is provided in front of the seating surface lowermost portion forming portion 25 and has a higher front side. Upwardly inclined surfaces (rearly inclined portion 145, front inclined surface portion 27) extending from the lowermost seat surface forming portion 25 at both the front and rear sides of the lowermost seat surface forming portion 25 as a center. The body 3 has a recess 147 that includes the seat surface lowermost forming portion 25 inside. In other words, the support 3 has a recess 147 having a bottom inclined portion 145 and a front inclined surface portion 27 as side surfaces rising from the bottom surface forming portion 25 of the seat surface.

  In such a sitting toilet seat 141, the seat surface lowermost forming portion 25 sandwiched between the rearwardly inclined portion 145 and the front inclined surface portion 27 is given an impression as if it is at the bottom of the recess 147, and the user should sit on a flatter portion. The user's habit is used to give the impression that the seat surface lowermost portion forming portion 25 is difficult to sit on, and seating on the front inclined surface portion 27 is induced. In addition, in the form shown in FIG. 8, it is also possible to make it comprise so that the back inclined surface part 55 as the slip-off reduction part 53 may function as the back inclined part 145 of the seating position guidance | induction part 143, and in that case The rear inclined surface in front of the lowermost surface forming portion 25 reduces the large slip of the user's thigh and gives the impression that the lowermost forming surface 25 of the seating surface is difficult to sit on. Inducing seating.

  Based on FIG. 18, yet another modification of the second embodiment will be described. FIG. 18 is a view showing a plane of a seat for toilet seat according to this modification. The sitting toilet seat 151 includes a support 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and a seating position guiding portion 153 that guides seating on the front inclined surface portion 27. With. In the present modification, the seating position guiding part 153 includes a rearward tilting part 155 provided in front of the seating surface lowermost part forming part 25. An upward slope extends from both the front and rear sides of the seat surface lowermost forming portion 25. Further, portions of the rearward inclined portion 155 and the front inclined surface portion 27 near the seat surface lowermost portion forming portion 25 are also inclined in the left-right direction so as to fall toward the opening 7. As a result, a recess 157 appears in a portion near the opening 7 in the seat surface lowermost forming portion 25 so that the seat surface lowermost forming portion 25 can be seen in a triangular shape in plan view.

  In such a sitting toilet 151, there is a recess 157 that looks like a triangular shape in plan view near the opening 7 of the seat surface lowermost portion 25, giving the impression that the seat surface lowermost portion 25 is difficult to sit down, Seating on the front inclined surface portion 27 can be guided.

  Based on FIG. 19, yet another modification of the second embodiment will be described. FIG. 19 is a view showing a cross section extending radially from the opening in the seat for toilet seat according to the present modification. (B), (c) is a cross section of the radial direction which follows the code | symbol 319,419 of (a), respectively. The sitting toilet seat 161 includes a support 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and a seating position guiding portion 163 that guides seating on the front inclined surface portion 27. With. A curved portion 23 is provided on the upper portion of the inner edge 17 of the support 3, and the seating position guiding portion 163 of the present modified example is a portion of the inner edge 17 where the seat surface lowermost forming portion 25 intersects. It is provided as a part 17a. The curvature radius of the curve 23a of the guide inner edge portion 17a is set to be smaller than the radius of curvature of the curve 17 of the inner edge behind the guide inner edge portion 17a, particularly on the side of the front inclined surface portion 27.

  In such a sitting toilet seat 161, taking advantage of the user's habit of sitting on a flatter part, the seat surface lowermost forming part 25 is more than the part around which the front inclined surface part 27 exists behind. Since the inner edge of the support body is angular, it gives an impression that it is difficult to sit down and induces seating on the front inclined surface portion 27.

  In addition to or instead of the guide inner edge portion 17a described above, a mode in which the guide outer edge portion is used as the seating position guide portion will be described. The upper portion of the outer edge 15 of the support 3 is provided with a curve 21, and the seating position guiding portion 173 of the present modified example is a portion of the outer edge 15 where the seat surface lowermost portion forming portion 25 intersects. It is provided as a part 15a. The curvature radius of the curve 21a of the guide outer edge portion 15a is set to be smaller than the radius of curvature of the curve 21 of the outer edge behind the guide outer edge portion 15a, particularly on the side of the front inclined surface portion 27.

  Even with such a configuration, the seat surface bottom-most forming portion 25 is more out of the support than the portion around which the front inclined surface portion 27 is present, utilizing the custom of a user trying to sit on a flatter portion. Since the edge is angular, it gives an impression that it is difficult to sit down and induces seating on the front inclined surface portion 27.

  Based on FIG. 20, still another modification of the second embodiment will be described. FIG. 20 is a perspective view relating to a sitting toilet seat according to this modification, and is a diagram showing two ridge lines. The sitting toilet seat 181 includes a support 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and a seating position guiding portion 183 that guides seating on the front inclined surface portion 27. With. Further, the support 3 has a seating surface minimum width forming portion 185. Here, the seat surface minimum width forming portion will be described with reference to FIGS. 5, 19, and 20. 5 and 19, the support 3 includes a curve 23 on the inner edge 17 side of the upper surface 19 and a curve 21 on the outer edge 15 side of the upper surface 19. As shown in FIG. 20, the support 3 is connected to the outer edge 19 by connecting the inner ridge line L and the connection point of the upper surface 19 and the curve 21 by connecting the connection point of the upper surface 19 and the curve 23. Two ridge lines called ridge line H can be derived. And the seating surface minimum width forming part 185 is a part of the left-right extension line including the site | part from which the width W of the left-right direction of the two ridgelines L and H becomes the minimum. The seating surface minimum width forming part 185 coincides with the seating surface lowest part forming part 25, and the seating position guiding part 183 in this modification is constituted by such a seating surface minimum width forming part 185.

  In such a sitting toilet seat 181, the seat surface bottom portion forming portion 25 is given an impression that it is difficult to sit on a portion having a small seat surface width by taking advantage of the user's habit of feeling that the seating comfort is poor, and the front inclined surface portion 27 can be guided.

  Based on FIG. 21, still another modification of the second embodiment will be described. FIG. 21 is a plan view of a sitting toilet seat according to this modification. The sitting toilet seat 191 includes a support 3, a front inclined surface portion 27, a seating position guide portion that guides seating on the front inclined surface portion 27, and a seat surface lowermost forming portion 25 in front of the front inclined surface portion 27. The distance Y between the central portion 195 in the front-rear direction of the front inclined surface portion 27 and the seat surface lowermost forming portion 25 is longer than the sliding distance of the inner side tissue of the buttocks at the time of sitting. The seating position guiding portion is not particularly limited as long as it is a means having a function of guiding seating on the front inclined surface portion 27. The sliding distance of the internal tissue can be obtained, for example, by comparing the position of the internal tissue at the initial stage of the user's seating with the position of the internal tissue at the end of the seating by X-ray imaging or the like.

  According to this modification, the following operation is obtained. Even if it is guided to a suitable seating position by the seating position guiding part, if the distance from the seating position to the seat surface lowermost part forming part 25 is short, the inner side tissue of the buttocks cannot sufficiently slide down, There is a problem that the pelvis cannot be rotated sufficiently. On the other hand, according to the present modification, using the user's habit of trying to sit down substantially in the middle of the guided position, the center portion 195 in the front-rear direction of the inclined surface portion 27 and the seat surface bottom portion forming portion Since the distance Y to 25 is longer than the sliding distance of the internal tissue of the buttocks at the time of sitting, a sufficient sliding space is secured for the user, and the pelvis as described above cannot be rotated sufficiently. It can be avoided.

  Based on FIG. 22, still another modification of the second embodiment will be described. (A) of FIG. 22 is a figure which shows the variation of a structure regarding the cross section of the left-right direction in alignment with the code | symbol 322 of (a), (b)-(d) is the plane of the sitting toilet seat which concerns on this modification. The sitting toilet seat 201 includes the support 3, the front inclined surface portion 27, and a seating position guiding portion that guides the seating on the front inclined surface portion 27. The central region 205 in the left-right direction at the rear portion of the toilet seat is formed to be the same height or lower than the left and right regions 207. Specifically, FIG. 22B shows an example in which the central region 205 in the left-right direction at the rear portion of the toilet seat is configured to have the same height as the left and right regions 207. FIG. ) Is an example in which the central region 205 in the left-right direction in the rear portion of the toilet seat is formed lower than the left and right regions 207. Further, FIG. 22D shows an aspect in which the center region 205 in the left-right direction at the rear portion of the toilet seat is formed lower than the left and right regions 207, and further, the region 209 outside the region 207 is the center region 205. This is an example of a configuration that is lower than the region 207 as in FIG. The seating position guiding portion is not particularly limited as long as it is a means having a function of guiding seating on the front inclined surface portion 27. According to this modification, it is possible to avoid the tail bone 39a of the user 31 from hitting the toilet seat rear center region 205 when the seat 31 is guided by the seating position guide portion and seated on the front inclined surface portion near the rear of the toilet seat.

Third embodiment.
As a third embodiment, a stool seat is provided with a pelvis posture holding part, thereby maintaining the user's pelvis in a rotated state by ending the user's sliding in the middle of the front inclined surface part Will be described. (A) of FIG. 23 is a top view of the sitting toilet seat which concerns on this Embodiment, (b) is the left-right direction cross section in alignment with the code | symbol 323 of (a). The sitting toilet seat 211 includes a support body 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and a pelvis posture holding portion that keeps the user's pelvis rotated. With. The pelvis posture holding part is provided in the middle of the front inclined surface part 27. Specifically, the pelvis posture holding part holds the user's buttocks in the middle of the front inclined surface part 27 behind the seat surface lowermost part forming part 25 and suppresses the user's slipping down to prevent the user's slipping. Part 213 is provided. Moreover, the heel part fall prevention part 213 is provided with the drop inclination part 215 inclined toward the opening 7 so that a user's buttock may be dropped into the opening 7 in the middle of the front inclined surface part 27 as an example. The dropping slope 215 is provided on the inner peripheral upper surface of the support 3 and on the left and right sides of the opening 7. In the present embodiment, the drop inclined portion 215 is formed as a part of a mortar-shaped curved surface centering on a target point 217b located behind the portion 217a where the seat bottom portion forming portion 25 is located in the opening 7. ing. Accordingly, the drop slope 215 ahead of the target point 217b tilts backward toward the target point 217b, and the drop slope 215 behind the target point 217b leans forward toward the target point 217b.

  In this sitting toilet seat 211, when seated, the pelvis rises in the forward rotation direction, and a posture that facilitates defecation with reduced rectal curvature can be obtained and maintained. More specifically, if the user's buttocks fall to the seat surface lowermost forming portion 25, the component a of gravity M by the front inclined surface portion 27 cannot be obtained, and the posture of the pelvis may return. However, in the present embodiment, by including the buttocks slip-off suppressing portion 213 that stops the user's buttocks so as to be positioned in the middle of the front inclined surface portion 27 behind the seat surface lowermost portion forming portion 25, The problem that the posture of the pelvis returns can be prevented. Moreover, since the buttocks slip-off suppression part 213 helps hold | maintain the position of a buttocks, a user's physical load can be made smaller. As a specific mode of slip-down suppression, a drop slope 215 inclined toward the opening 7 so as to drop the user's buttocks into the opening 7 in the middle of the front slope surface portion 27 is provided. The buttocks are dropped toward the opening 7 in the middle of the front inclined surface portion 27, and further slipping forward is suppressed, and the rotated posture of the pelvis is maintained. Moreover, the anus spreads when the buttocks fall, and the effect that it is possible to obtain a posture that facilitates defecation can also be obtained.

  A modification of the third embodiment will be described with reference to FIG. (A) of FIG. 24 is a plan view of a sitting toilet seat according to this modification, and (b) and (c) are cross sections in the left-right direction along the reference numerals 324 and 424 of (a), respectively. The sitting toilet seat 211 includes the support body 3, the front inclined surface portion 27, the seat surface lowermost forming portion 25, and a pelvis posture holding portion that keeps the user's pelvis rotated. The support 3 is provided with an opening maximum width forming portion 13 as a position to be seated by the user. The pelvis posture holding unit includes a buttocks slip-off suppressing unit 223 that holds the user's buttocks in the middle of the front inclined surface portion 27 behind the seat surface lowermost forming portion 25 and stops the above-described slipping of the user. The buttocks slip-off suppressing portion 223 includes a seat surface interval maximum portion 225 in which the interval between the left and right seat surfaces sandwiching the opening 7 is maximized. Here, the seat space maximum portion will be described. As described with reference to FIGS. 5, 19, and 20, the support 3 has an inner ridge line L formed by connecting the connection points between the upper surface 19 and the curve 23. As shown in FIG. 24, the maximum portion of the seating surface interval can be derived from a portion of the left and right extension line that includes a portion where the left and right ridgelines L between the left and right sides of the opening 7 are the smallest. It is. The seat surface interval maximum portion 225 is arranged in the middle of the front inclined surface portion 27 behind the seat surface lowermost portion forming portion 25, and the user's buttocks is placed in the seat surface interval maximum portion 225 in the middle of the front inclined surface portion 27. The slipping of the internal tissue of the buttocks is terminated by being stuck. In a more preferable configuration, in addition to such a configuration, the seat surface interval maximum portion 225 may be positioned between the seat surface lowest portion forming portion 25 and the maximum opening width forming portion 13.

  In such a sitting toilet seat 221, if the user's buttocks fall to the seat surface lowermost forming portion 25, the component force a of gravity M by the front inclined surface portion 27 cannot be obtained and the posture of the pelvis may return. However, since there is a seat surface interval maximum portion 225 in the middle of the front inclined surface portion 27 and the user's buttocks easily fit into the seat surface interval maximum portion, the collar portion is more securely stopped in the middle of the front inclined surface portion. The problem that the posture of the pelvis returns can be prevented.

  Furthermore, when the seating surface interval maximum part 225 is located between the seating surface lowest part forming part 25 and the opening maximum width forming part 13, the opening maximum width forming part 13 functions as a seating position guiding part, The distance between the seating position and the seat surface interval maximum portion 225 is ensured more surely to obtain a slipping operation for suitably rotating the pelvis, and then the hip portion slips at the seat surface interval maximum portion 225. Holding of the pelvis which is restrained and rotated can be realized.

Fourth embodiment.
As a fourth embodiment, it is provided with an open leg suppressing part, thereby suppressing the user's open leg and maintaining the relaxation of the muscle group that applies tensile force to the lower pelvic side as described later. A sitting toilet seat that makes the pelvis easy to stand in the forward rotation direction and obtains a posture that facilitates defecation with a relaxed rectal curvature will be described. (A) of FIG. 25 is a plan view of the sitting toilet seat according to the present embodiment, and (b) shows a cross section along a cutting line extending from the center front to the outer rear indicated by reference numeral 325 in (a). FIG. The sitting toilet seat 241 includes a support body 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25 provided in front of the front inclined surface portion 27, and an open leg suppressing portion that suppresses an open leg when the user is seated. 243. In the present embodiment, the leg opening restraining portion 243 includes a pair of restraining concave grooves 245 that extend in the shape of a letter C in plan view so that the distance increases toward the front of the support 3. Thereby, each of the user's thighs is dropped into the corresponding restraining concave grooves 245, so that the thighs are restrained from opening from the side. The suppression groove 245 is provided in the vicinity of the seat surface lowermost formation portion 25. Further, each of the restraining concave grooves 245 includes an inner slope 245a located near the center of the support 3 and an outer slope 245b located near the left and right outer sides of the support 3, and the slope of the inner slope 245a has an outer slope. It is smaller than the inclination of 245b.

  Next, the operation of the sitting toilet seat according to the present embodiment having such a configuration will be described. Prior to that, the relationship between the open leg of the thigh and the pelvis will be described. FIG. 26 is a diagram showing the relationship between the thigh opening leg and the pelvic backward tilt, and FIG. 27 is a diagram showing the effect of thigh opening suppression on the pelvis. As shown in FIG. 26, there is an adductor muscle group 43 at the base of the femur 41, and the rear end of the adductor muscle group 43 is finally connected to the lower part of the pelvis 33. The front end of the group 43 is finally connected to the femur 41. For this reason, when the thigh is opened, as shown in FIG. 26, the adductor muscle group 43 is pulled, and the tension generated in the adductor muscle group 43 increases. Due to the increase in the tension, the lower portion of the pelvis 33 is pulled forward, that is, the pelvis 33 is subjected to a rotational force in a reverse direction. The rotational force in the backward rotation direction inhibits the forward rotation of the pelvis 33 that the present invention intends to achieve. On the other hand, as shown in FIG. 27, when the legs of the thighs are suppressed, that is, when the thighs are kept closed to some extent, the relaxation of the adductor muscle group 43 is also maintained. Thus, an increase in the rotational force in the backward rotation direction in the pelvis 33 is avoided, and the pelvis 33 becomes easier to roll forward.

  In the present embodiment, based on the relationship between the leg opening of the thigh and the pelvis, by providing the leg opening suppressing portion 243, the user's leg is suppressed and a tensile force is applied to the lower pelvis side. By maintaining the relaxation of the muscle groups, the pelvis can be easily lifted in the forward direction, and the posture of the bowel can be acquired with ease of rectal curvature. Further, by adopting a pair of restraining concave grooves 245 extending in the shape of a square in plan view so that the distance increases toward the front of the support 3 as the leg opening restraining portion 243, Directly prevent directional movement and suppress user's leg opening. In addition, by employ | adopting a pair of suppression ditch | groove 245, the contact area with a toilet seat can be expanded to the side surface of each thigh, By making a user act a frictional force more reliably, Further, there is an advantage that the pelvic forward rotation is more surely generated by the frictional force and the gravity force. Furthermore, since the suppression ditch | groove 245 is each provided in the vicinity of the seat surface lowermost part formation part 25, the suppression ditch | groove 245 will be in the vicinity of the pelvis 33. FIG. Therefore, the frictional force to the user due to the restraining concave groove 245 can also be applied from closer to the pelvis 33, and the frictional force and the gravitational force can function efficiently to rotate the pelvis.

  Further, in the present embodiment, an advantage resulting from the turning motion around the axis of the femur is also obtained. FIG. 28 (a) shows the turning motion of the femur. FIG. 28 (b) shows the femoral turning motion in an abstract cross-section along the reference numeral 328 of FIG. 28 (a). As shown by an arrow 41a in FIG. 28, when a rotational force is applied to the femur 41 in the direction of external rotation around its axis, the front end of the actual femur 41 is connected to the knee. As a result of restraint with respect to the turning motion, the result appears as an open leg motion of the thigh such that the left and right knees move away from each other. On the contrary, as shown by the arrow 41b on the femur 41, when a rotational force in the direction of performing the internal rotation is applied around the axis, the left and right knees move as a result of approaching. Appears as a thigh-closed leg movement. Based on such a relationship, in the present embodiment, the slope of the inner slope 245a of the restraint groove 245 is smaller than the slope of the outer slope 245b, and the restraint groove 245 supports the macroscopic view. It can be seen that the body 3 is inclined from the outside toward the center (opening), so that each of the left and right thighs is oriented so as to perform an internal rotation motion that falls toward the opening 7. Receives rotational force. Therefore, as a result, the leg closing movement of the thigh that moves in the direction in which the left and right knees approach from the aforementioned relationship is promoted, the relaxation of the muscle group is further maintained, and the rise of the pelvis is further increased. The advantage of being easy is obtained.

  A modification of the fourth embodiment will be described with reference to FIG. (A) of FIG. 29 shows the plane of the seat on the seat according to this modification in which the slope of the outer slope of the restraining groove is not uniform, and (b) and (c) are reference numerals 329 of (a), It is a figure which shows the cross section which follows the cutting line extended from the center front shown to 429 to the back outside. The sitting toilet seat 251 includes a support body 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25, and an open leg suppressing portion 253 that suppresses an open leg when the user is seated. The open leg suppressing portion 253 includes a pair of suppressing concave grooves 255 extending in a square shape in plan view so that the interval increases toward the front of the support 3. Each of the restraining concave grooves 255 is provided in the vicinity of the seat surface lowermost forming portion 25. Each of the restraining grooves 255 includes an inner slope 255a located closer to the center of the support 3 and an outer slope 255b located closer to the left and right outer sides of the support 3. The slope of the inner slope 255a has an outer slope. It is smaller than the inclination of 255b. Furthermore, the inclination of the outer inclined surface 255 b in the suppression groove 255 is not uniform, and changes so as to decrease toward the front in the extending direction of the suppression groove 255. For example, two cross sections are shown in FIG. 29, and the cross section (c) is a cross section that is located in front of the cross section of (b) in the extending direction of the restraining groove 255. The inclination of the outer slope 255b in the section (c) is smaller than the inclination of the outer slope 255b in the section (b).

  Depending on the sitting toilet seat 251, the leg opening restraining unit 253 is provided to suppress the user's leg opening and maintain the relaxation of the muscle group that applies a tensile force to the lower pelvic side, so that the pelvis is rotated forward. It is easy to stand up and acquire a posture that makes bowel movement easier with rectal curvature. Furthermore, by providing a pair of restraining concave grooves 255, it is possible to directly prevent lateral movement with respect to the individual thighs, to restrain the user's legs, and to the toilet seat to the side of each thigh. The pelvic forward rotation due to the frictional force and the gravitational force can be more reliably generated. Furthermore, since the restraining concave groove 255 is closer to the pelvis 33, the pelvis can be rotated by efficiently functioning the frictional force and the gravity component. Furthermore, due to the rotational force in the direction of performing internal rotation, the thighs are encouraged to move in the legs, the muscle groups are more relaxed, and the pelvis can be easily lifted. can get.

  In addition, the thigh of the user seated on the toilet seat is compressed at the front side. This is due to the following. As can be seen from the positional relationship between the seated user's buttocks and thighs and the support shown in FIG. 30, the portion closer to the rear of the thigh fits inside the support 3, while the thigh There is an increased tendency for the portion closer to the front side to protrude outwardly from the left and right sides of the support 3. For this reason, the thigh of the seated user tends to be more pressed at the front side. On the other hand, in this modified example, as described with reference to the cross-sectional views of FIGS. 29B and 29C described above, the inclination of the outer inclined surface 255b of the restraining concave groove 255 becomes smaller toward the front. Therefore, there is an advantage that such a pressure can be avoided and the burden on the user can be reduced. That is, in this modified example, in the portion of the thigh that is close to the pelvis, the effect of promoting the rise of the pelvis by suppressing leg opening is obtained, but in the portion of the thigh that does not affect it, compression is avoided and the burden on the user is avoided. There is also an advantage that can be reduced.

  A further modification of the fourth embodiment will be described based on FIG. (A) of FIG. 31 shows the plane of the sitting toilet seat which concerns on this modification in which the suppression ditch | groove includes a flat surface, (b) is the cutting | disconnection extended outside outward from the center front shown with the code | symbol 331 of (a). It is a figure which shows the cross section which follows a line. The sitting toilet seat 261 includes a support body 3, a front inclined surface portion 27, a seat surface lowermost forming portion 25, and an open leg suppressing portion 263 that suppresses an open leg when the user is seated. The leg opening suppressing portion 263 includes a pair of suppressing concave grooves 265 extending in a C shape in a plan view so that the distance increases toward the front of the support 3. Each of the suppression grooves 265 is provided in the vicinity of the seat surface lowermost forming portion 25. Each of the suppression grooves 265 includes an inner slope 265a located near the center of the support 3 and an outer slope 265b located near the left and right outer sides of the support 3. The slope of the inner slope 265a has an outer slope. It is smaller than the inclination of 265b. Further, the leg opening suppressing portion 263 includes a flat surface 267 extending in the horizontal direction further toward the center of the support body and in front of the inner slope of the suppression groove. In addition, although not limited, in this modified example, the inclination of the outer inclined surface 255b may be configured to change so as to decrease toward the front in the extending direction of the suppression concave groove 255.

  Also with this seat 261, the leg restraining part 263 is provided, so that the leg of the user can be restrained, the pelvis can be easily raised in the forward rotation direction, and the posture for easy defecation with reduced rectal curvature is obtained. . Further, the pair of restraining concave grooves 265 directly prevent lateral movement with respect to the individual thighs, suppress the open legs, and expand the contact area with the toilet seat to the side surfaces of the individual thighs. In this case, the pelvic forward rotation can be caused more reliably. Furthermore, since the restraining concave groove 245 is closer to the pelvis 33, the pelvis can be rotated by efficiently functioning the frictional force and the gravitational force. Further, it is possible to obtain an advantage of facilitating the leg closing movement of the thigh due to the rotational force in the direction of performing the internal rotation movement and making the pelvis standing up more easily. Further, as described above, the thigh portion may be compressed as the portion closer to the front side. In the present modification, the thigh portion is further closer to the center of the support body 3 than the inner slope 265a and to the front in the horizontal direction. Since the extended flat surface 267 is provided, in the portion close to the pelvis of the thigh, while obtaining the effect of promoting the rise of the pelvis by suppressing the leg opening, in the portion of the thigh that does not affect it, the compression is avoided and the user is avoided. There is also an advantage that the burden on the user can be reduced.

Fifth embodiment.
As a fifth embodiment, a sitting toilet seat that includes a slip-down reducing portion, thereby providing resistance to forward movement of the thigh and reducing a large slip of the thigh will be described. This embodiment will be described with reference to FIG. (A) of FIG. 32 shows the plane of the sitting toilet seat which concerns on this Embodiment, (b), (c) is the front-back direction cross section which follows the code | symbols 332,432 of (a). The sitting toilet seat 271 includes a support 3, a front inclined surface portion 27, a seat surface lowermost portion forming portion 25, and a slip-off reducing portion 273. When the internal tissue of the buttock 39 slides downward along the front inclined surface portion 27 by the component force parallel to the front inclined surface portion 27 of gravity acting on the user, the slip-off reducing portion 273 is moved to the user's thigh. This is a portion configured to come into contact with the back surface of the thigh and provide resistance to slipping of the thigh, and is provided in front of the front inclined surface portion 27. Further, the slip-down reducing portion 273 includes a rear inclined surface portion 275 whose front side is increased. The rear inclined surface portion 275 is provided in front of the front inclined surface portion 27 so as to sandwich the seat surface lowermost portion forming portion 25 with the front inclined surface portion 27. The inclination of the rear inclined surface portion 275 in the front-rear direction is smaller than the center of the support 3 as the position is on the outer side of the support 3. As an example, FIG. 32 shows two cross sections, and the cross section of (c) is a cross section located outside the support 3 with respect to the cross section of (b). The inclination in the front-rear direction of the rear inclined surface part 275 in the cross section of (b) is smaller than the inclination in the front-rear direction of the rear inclined surface part 275 in the cross section of (c). The inclination of the rear inclined surface portion 275 may be set to be smaller than the inclination of the front inclined surface portion 27.

  Even with such a sitting toilet seat 271, by providing the front inclined surface portion 27, the user's pelvis rises in the forward rotation direction when seated like the sitting toilet seat 1 of FIGS. It is possible to obtain a posture that is easy to defecate. In addition to this, the following effects are also obtained in the present embodiment. First, as described above, by sitting on the front inclined surface portion 27, the inner side tissue inside the skin of the buttocks slides downward along the front inclined surface portion 27 due to the force of gravity. Here, if the user's thigh falls significantly, the effect of the frictional force between the skin of the buttocks and the front inclined surface portion 27 cannot be obtained sufficiently, and the pelvis translates in parallel with the front inclined surface portion 27. There is a problem that only insufficient rotation can be obtained. In contrast, in the present embodiment, the slip-off reduction unit 273 comes into contact with the back surface of the user's thigh and provides resistance to the forward movement of the thigh. Is reduced, and the rotational force for forward rotation due to the gravitational force and frictional force works firmly on the pelvis. Moreover, in this Embodiment, such an effect | action is acquired only by the device of the form of the support body which forms the back inclined surface part 275, without requiring an additional part. In addition, the rear inclined surface portion 275 for suppressing slip-down may press the back side of the thigh and cause a burden on the user, so that the outer inclination of the rear inclined surface portion 275 is made smaller than the central inclination. Thus, the pressure acting on the back side of the thigh can be dispersed to the outside of the support. Thereby, the burden which acts on a user's body can also be reduced significantly, suppressing the big slip of a user's thigh by a back inclined surface part.

  A modification of the fifth embodiment will be described based on FIG. (A) of FIG. 33 shows the plane of the sitting toilet seat according to this modification, (b) shows a front-rear direction cross section near the center of the support body along the reference numeral 333 of (a), (c), ( (d) is a figure which shows the variation from which the cross section of the front-back direction near the outer side of the support body which follows the code | symbol 433 of (a) differs.

  The sitting toilet seat 281 includes a support 3, a front inclined surface portion 27, a seat surface lowest portion forming portion 25, and a slip-off reducing portion 283. The slip reduction part 283 is a part configured to contact the back surface of the user's thigh and provide resistance to slipping of the thigh, and is provided in front of the front inclined surface part 27. . The sliding reduction portion 283 of this modification includes a rear inclined surface portion 285 and a flat surface portion 287a or a second front inclined surface portion 287b. The rear inclined surface portion 285 and the flat surface portion 287a or the second front inclined surface portion 287b are both provided in front of the front inclined surface portion 27 so as to sandwich the seating surface lowermost portion forming portion 25 with the front inclined surface portion 27. However, the rear inclined surface portion 285 is provided only near the center of the support 3 in front of the front inclined surface portion 27 as shown in the cross section of FIG. 33 (b), and the flat surface portion 287a or the second front inclined surface portion 287b is provided. 33, as shown in the cross section of (c) or (d) in FIG. 33, it is arranged only on the outer side of the support body 3 in front of the front inclined surface portion 27. Note that the inclination of the rear inclined surface portion 285 may be set to be smaller than the inclination of the front inclined surface portion 27.

  Also with such a sitting toilet seat 281, by providing the front inclined surface portion 27, as with the sitting toilet seat 271 of FIG. 32, when seated, the user's pelvis rises in the forward rotation direction and the bowel movement in which rectal curvature is relaxed A posture that is easy to do can be obtained. In addition, since the slip-off reduction unit 283 comes into contact with the back surface of the user's thigh and provides resistance to the forward movement of the thigh, a large drop of the thigh is reduced, and the gravity force and The rotational force for the forward rotation due to the frictional force works firmly on the pelvis. Further, such an action can be obtained only by devising the form of the support body by forming the rear inclined surface portion 285 and the flat surface portion 287a or the second front inclined surface portion 287b without requiring additional parts. ing. Further, there is a possibility that the rear inclined surface portion for suppressing slip-down may press the back side of the thigh and put a burden on the user. However, the rear inclined surface portion 285 of this modification is provided only at a position near the center of the support 3. Since the flat surface portion 287a or the second front inclined surface portion 287b is provided at a position closer to the outer side of the support body 3 (on the side of the rear inclined surface portion 285), the pressure acting on the back side of the thigh is supported by the support body. Can be dispersed outside. Thereby, the burden which acts on a user's body can also be reduced significantly, suppressing the big slip of a user's thigh by a back inclined surface part.

  Based on FIG. 34, still another modification of the fifth embodiment will be described. (A) of FIG. 34 shows the plane of the sitting toilet seat which concerns on this modification, (b) is the front-back direction cross section along the code | symbol 334 of (a). As shown in the cross section of (b) in FIG. 34, the seat of toilet seat 291 of the present modified example has a lower front side in front of the rear inclined surface portion 275 or 285 in the modified example shown in FIG. 32 or FIG. Further, the front inclined surface portion 297 is provided for forward pressure relief. Note that the inclination of the rear inclined surface portions 275 and 285 may be set to be smaller than the inclination of the front inclined surface portion 27.

  Such a sitting toilet seat 291 can provide the same operation as the sitting toilet seats 271 and 281 of FIGS. In addition, in the sitting toilet seat 291, the pressure acting on the back side of the thigh can be distributed to the front of the support body, thereby reducing the load acting on the user's body.

  The contents of the present invention have been specifically described above with reference to preferred embodiments. However, a person skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. is there.

241, 251, 261 Sitting toilet seat 3 Support body 7 Opening 13 Opening maximum width forming part 25 Seating surface lowest part forming part 27 Front inclined surface part 243, 253, 263 Opening leg suppressing part 245, 255, 265 Suppressing concave groove 245a, 255a, 265a Inner slope 245b, 255b, 265b Outer slope 267 Flat surface

Claims (6)

A sitting toilet seat used on a toilet bowl,
A support that supports the user's body around the opening where excrement falls;
The front surface of the support is provided at a position that comes into contact with the user's buttocks when the user is seated, and is a front inclined surface portion that rotates the pelvis in a direction in which the upper side of the user's pelvis moves forward, The side is lowered, the user sits on the front inclined surface portion, and the front inclined surface portion and the user's buttocks contact, while the inner side tissue of the buttocks is above the gravity acting on the user. The pelvis is rotated by sliding downward along the front inclined surface portion by a component force parallel to the inclined surface portion, whereby the skin of the user's buttocks is pulled backward by the front inclined surface portion. The front inclined surface portion,
A sitting toilet seat comprising an open leg restraining portion that restrains an open leg when the user is seated. The leg-opening suppression portion includes a pair of suppression grooves that extend in the shape of a letter C in plan view so that the distance increases toward the front of the support body, and the thigh falls into the corresponding suppression groove. The seat in the seat according to claim 1, wherein the thigh is configured to be restrained from opening from the side. The support has a seat surface lowermost forming portion including the lowest portion of the seat surface in front of the front inclined surface portion,
The seat according to claim 2, wherein each of the restraining concave grooves is provided in the vicinity of the seat surface lowermost forming portion. Each of the suppression grooves includes an inner slope located near the center of the support, and an outer slope located near the left and right outer sides of the support,
The seat of the seat according to claim 3, wherein the slope of the inner slope is smaller than the slope of the outer slope. The seat of the seat according to claim 4, wherein the inclination of the outer slope is smaller toward the front in the extending direction of the recess. The seating toilet seat according to claim 4, wherein the spread leg restraining portion further includes a flat surface extending in a horizontal direction further toward the center and forward of the support body than the inner slope of the restraining groove.

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