JP7342633B2 - toilet seat - Google Patents

Description

The present invention relates to a toilet seat.

Conventionally, this type of toilet seat has an inner hole and the rear end side is pivoted to the toilet bowl. It has also been proposed that the level is lower than that of the area near the inner periphery (for example, see Patent Document 1). By adopting this shape, this toilet seat allows a considerable proportion of the body weight to be supported by the thighs when seated, reducing the weight placed on the ischial bones and reducing the force that presses the ischial bones against the toilet seat. It is said that it can be done.

Utility Model Publication No. 2-61295

However, in the toilet seat described in Patent Document 1, a considerable proportion of the body weight is supported by the thighs, which may cause numbness in the feet due to poor blood circulation to the feet (toes), and there is still room for improvement.

The main purpose of the toilet seat of the present invention is to provide a toilet seat that improves sitting comfort by dispersing body pressure from the ischial tuberosities and buttocks well.

The toilet seat of the present invention employs the following means to achieve the above-mentioned main purpose.

The toilet seat of the present invention is
A toilet seat having a substantially elliptical seating surface,
The inner diameter corner, which is the corner on the inner diameter side in the radial direction of the seating surface, and the outer diameter side corner, which is the corner on the outer diameter side, are obtained by cutting the toilet seat along a vertical plane extending in the radial direction from the center of the inner hole. In the radial cross section, it has a convex arc-shaped outline,
The radius of curvature of the inner corner in the radial cross section is such that the cutting angle is 0° when the toilet seat is cut along a vertical plane extending forward from the center of the inner hole, and the cutting angle is less than 130°. It is formed so that it takes a maximum value in a radial cross section when a predetermined angle is set to be larger than 180°, and becomes smaller as it moves away from the predetermined angle,
In the range of 90° to 180°, the seat angle, which is the angle formed with the horizontal line of the straight line connecting the adjacent circular arc ends of the inner diameter corner and the outer diameter corner in the radial cross section, is within the range of 90° to 180°. formed to become larger as the cutting angle increases,
The gist is that.

In the toilet seat of the present invention, the inner diameter corner and the outer diameter corner of the seating surface have a convex arc-shaped outline in a radial cross section when the toilet seat is cut along a vertical plane extending radially from the center of the inner hole. have The radius of curvature of the inner radial corner in the radial cross section should be larger than 130° and larger than 180°, assuming that the cutting angle is 0° when the toilet seat is cut along a vertical plane extending forward from the center of the inner hole. The maximum value is obtained in the radial cross section when the angle is set to a small predetermined angle, and the value becomes smaller as the distance from the predetermined angle increases. In addition, the seat angle, which is the angle made with the horizontal line of the straight line connecting the adjacent arc ends of the inner diameter corner and the outer diameter corner in the radial cross section, is the cutting angle in the range of 90° to 180°. It is formed so that it becomes larger as it becomes larger. As a result, a gentle concavity is formed around the area where the radius of curvature is maximum at the inner corner of the seating surface, so that when the user sits on the toilet seat, the user's ischial tuberosity will be at the inner corner. The body pressure from the ischial tuberosity can be dispersed well. In addition, since the user's buttocks hit the inclination of the seating surface defined by the seat angle along the curve of the buttock, body pressure from the buttocks can also be dispersed well. As a result, the body pressure on the ischial tuberosity and buttocks can be dispersed well, and the comfort of sitting can be further improved. Here, "the predetermined angle" is preferably an angle larger than 145° and smaller than 160°, more preferably larger than 150° and smaller than 155°.

In the toilet seat of the present invention, the seating surface is formed at a substantially constant height from the front end to a predetermined position in the center, when viewed from the side of the toilet seat from left and right, and from the predetermined position to the rear end. The height may be gradually increased toward the sides. In this way, the toilet seat can be made thinner while setting the radius of curvature and the seat angle to appropriate values according to the cutting angle.

Furthermore, in the toilet seat of the present invention, the radius of curvature of the inner corner is 5.7 to 13.6 mm and 5.7 to 13.6 mm in the radial cross section at the cutting angles of 90°, 135°, and 180°, respectively. 18.7 mm, defined in the range of 3.7 to 13.9 mm, and the seat angle is 4.6 to 14.6 in the radial cross section where the cutting angle is 90°, 135°, and 180°, respectively. The seating surface width, which is the width of the seating surface in the radial direction, is determined in the range of 90°, 12.5° to 19.3°, and 27.4° to 41.8°, and the width of the seating surface in the radial direction is , 180° radial cross section may be set in the ranges of 42.2 to 65.2 mm, 92.7 to 121.7 mm, and 26.5 to 31.1 mm, respectively. In this case, the radius of curvature of the inner corner is determined in the range of 5.8 to 10.7 mm and 5.0 to 14.0 mm in the radial cross section at the cutting angle of 0° and 45°, respectively. , the seating surface angle is determined in the range of 1.4 to 6.0° and 2.3 to 5.5° in the radial cross section where the cutting angle is 0° and 45°, respectively; The width may be determined in the range of 23.9 to 41.2 mm and 38.7 to 60.4 mm in the radial cross section at the cutting angle of 0° and 45°, respectively.

It is an external perspective view of the toilet seat 10 of this embodiment. It is a top view of toilet seat 10 of this embodiment. 3 is a sectional view showing the XX section of the toilet seat 10 in FIG. 2. FIG. 3 is a cross-sectional view showing the OA cross section (cross section A) of the toilet seat 10 in FIG. 2. FIG. 3 is a sectional view showing the OB section (section B) of the toilet seat 10 in FIG. 2. FIG. 3 is a cross-sectional view showing the OC cross section (cross section C) of the toilet seat 10 in FIG. 2. FIG. 3 is a cross-sectional view showing the OD cross section (cross section D) of the toilet seat 10 in FIG. 2. FIG. 3 is a cross-sectional view showing the OE cross section (cross section E) of the toilet seat 10 in FIG. 2. FIG. 3 is a sectional view showing the OF section (section F) of the toilet seat 10 in FIG. 2. FIG. 3 is a graph showing the seating surface width w in each cross section A to F of the seating surface 12. FIG. 3 is a graph showing the seating surface angle θ in each cross section A to F of the seating surface 12. FIG. 2 is a graph showing the radius of curvature R of the corner on the inner diameter side in each cross section A to F of the seating surface 12. FIG. 3 is a graph showing the radius of curvature r of the outer corner in each cross section A to F of the seating surface 12. FIG. FIG. 3 is a cross-sectional view showing the XX cross section of a toilet seat 10B of a comparative example. It is an explanatory view showing body pressure distribution when sitting on a toilet seat in an example and a comparative example.

Embodiments for carrying out the present invention will be described with reference to the drawings.

1 is an external perspective view of the toilet seat 10 of this embodiment, FIG. 2 is a top view of the toilet seat 10 of this embodiment, and FIG. 3 is a cross-sectional view showing the XX section of the toilet seat 10 of FIG. It is a diagram. 4 is a sectional view showing the OA cross section (cross section A) of the toilet seat 10 in FIG. 2, and FIG. 5 is a sectional view showing the OB cross section (cross section B) of the toilet seat 10 in FIG. 6 is a sectional view showing the OC cross section (cross section C) of the toilet seat 10 in FIG. 2, and FIG. 7 is a sectional view showing the OD cross section (cross section D) of the toilet seat 10 in FIG. 8 is a cross-sectional view showing the OE cross section (cross section E) of the toilet seat 10 in FIG. 2, and FIG. 9 is a cross sectional view showing the OF cross section (cross section F) of the toilet seat 10 in FIG. be. Note that cross section A is a 0° cross section of the toilet seat 10 taken along the OA plane (cutting angle of 0°) extending forward from the center O of the inner hole 11, and cross section B is a 0° cross section of the toilet seat 10 taken along the OA plane (cutting angle of 0°). It is a 45° cross section cut at the O-B plane (cutting angle of 45°) which is inclined 45° in the circumferential direction with respect to the O-A plane. It is a 90° cross section cut at an O-C plane (cutting angle of 90°) inclined at an angle of 90°, and the cross-section D is a 90° cross section cut at an O-D plane (cutting angle of 90°) when the toilet seat 10 is inclined at 135° in the circumferential direction with respect to the O-A plane. The cross section E is a 135° cross section cut at a 135° cutting angle), and the cross section E is a 135° cross section cut at an OE plane (153° The cross section F is a 153° cross section cut at a 153° cutting angle), and the cross section F is a 180° cross section cut at an O-F plane (180° cutting angle) that is inclined 180° in the circumferential direction with respect to the OA plane. It is a cross section.

The toilet seat 10 of this embodiment is installed in a Western-style toilet bowl, and is rotatably supported at the rear end side of the Western-style toilet bowl (opening/closing). The toilet seat is configured as an O-shaped toilet seat having a seating surface 12 formed in a substantially elliptical shape when viewed from above.

The seating surface 12 includes an upper surface portion 121, an inner corner portion 122, and an outer corner portion 123, and is formed approximately symmetrically with respect to a vertical plane passing through the center O of the inner hole 11 of the toilet seat 10 and extending in the front-rear direction. Ru. The upper surface portion 121 is formed to curve in a slightly convex arc shape in the radial direction (width direction). The inner corner portion 122 is formed on the inner diameter side of the seating surface 12 in the radial direction, and is curved into a convex arc shape with a radius of curvature smaller than that of the upper surface portion 121. The outer corner portion 123 is formed on the outer diameter side of the upper surface portion 121 in the radial direction, and is curved into a convex arc shape with a smaller radius of curvature than the upper surface portion 121 .

In addition, as shown in FIG. 3, in a side view of the toilet seat 10 from the left and right, the seating surface 12 is positioned from the front end to a position P in the figure (from the rear end side of the center O of the inner hole 11 of the toilet seat 10). It is formed to have a substantially constant height up to position P, and is formed to gradually become higher from position P toward the rear end side.

10 is a graph showing the seat width w in each cross section A to F of the seating surface 12, FIG. 11 is a graph showing the seat angle θ in each cross section A to F of the seating surface 12, and FIG. is a graph showing the inner corner radius of curvature R in each cross section A to F of the seating surface 12, and FIG. 13 is a graph showing the outer corner radius of curvature r in each cross section A to F of the seating surface 12. It is. Further, FIG. 14 is a sectional view showing the XX cross section of the toilet seat 10B of the comparative example. In FIGS. 10 to 13, data plotted as circular points represent data of the example, and data plotted as square points represent data of a comparative example. Note that in FIGS. 10 to 13, the cross sections are connected by straight lines, but in reality, they are connected by smooth curves. Further, the seat width w in FIG. 10 is the horizontal distance between both ends of the upper surface portion 121 in each cross section A to F. The seat angle θ in FIG. 11 is a straight line connecting both ends of the upper surface portion 121 in each cross section A to F (a straight line connecting adjacent arcuate ends of the inner corner 122 and the outer corner 123) is the angle with respect to the horizontal line. The radius of curvature R of the inner corner in FIG. 12 is the radius of curvature of the inner corner 122 in each cross section A to F. The radius of curvature r of the outer corner in FIG. 13 is the radius of curvature of the outer corner 123 in each cross section A to F. The toilet seat 10 is constructed by connecting sections A to F, whose outlines are specified by elements including the seat width w, the seat angle θ, the radius of curvature R, and the seat height h, with a smooth curved surface. be done.

As shown in FIG. 10, in the example, the seat width w is 40.3 mm (cross section A ), 47.2 mm (cross section B), 47.8 mm (cross section C), 123.7 mm (cross section D), 60.1 mm (cross section E), and 30.7 mm (cross section F). The seat width w is 23.9 to 41.2 mm (cross section A), 38.7 to 60.4 mm (cross section B), 42.2 to 65.2 mm (cross section C), 92. It is preferably determined within the ranges of 7 to 121.7 mm (cross section D), 59.55 to 92.64 mm (cross section E), and 26.5 to 31.1 mm (cross section F).

As shown in FIG. 11, in the example, the seat angle θ is 5.8° (cross section A), 4.7° (cross section B), 12.1° (cross section C), 18.6° (cross section D), 30.5° (cross section E), and 40.7° (cross section F). The seat angle θ is 1.4 to 6.0° (cross section A), 2.3 to 5.5° (cross section B), and 4.6 to 14.6° (cross section C), taking into account tolerances. , 12.5 to 19.3° (cross section D), 22.27 to 33.68° (cross section E), and 27.4 to 41.8° (cross section F), and at least It is preferable to set the cutting angle to increase as the cutting angle increases in the range of 90° to 180°. Further, it is more preferable that the seat angle θ is set so that the rate of increase between the cross sections DE and E is larger than the rate of increase between the cross sections EF, as shown in FIG. Furthermore, it is more preferable that the seat angle θ is set so that the rate of increase between the cross sections DE and E is greater than the rate of increase between the cross sections CD. By setting the seat angle θ in this manner, the slope of the seat surface 12 fits the curve of the buttocks on the rear end side of the seat surface 12, and body pressure from the buttocks can be dispersed well.

As shown in FIG. 12, in the example, the radius of curvature R of the inner corner is 10.0 mm in cross sections A to F where the cutting angle is 0°, 45°, 90°, 135°, 153°, and 180°. (Cross section A), 11.2 mm (Cross section B), 11.3 mm (Cross section C), 18.6 mm (Cross section D), 30.5 mm (Cross section E), and 13.1 mm (Cross section F). The radius of curvature R of the inner corner is 5.8 to 10.7 mm (cross section A), 5.0 to 14.0 mm (cross section B), and 5.7 to 13.6 mm (cross section C), taking into account tolerances. , 5.7 to 18.7 mm (cross section D), 5.65 to 14.72 mm (cross section E), and 3.7 to 13.9 mm (cross section F). In the embodiment, the radius of curvature R of the inner corner is set to have a maximum value at cross section E (153°), and to become smaller as the distance from 153° increases. It is further preferable that the radius of curvature R of the inner corner corner is set so that the rate of increase between cross sections DE is greater than the rate of increase between cross sections CD. As a result, the inner diameter side corner portion 122 is formed with a gentle concavity with the deepest point being 153° in the circumferential direction from the center O of the seating surface 12. Therefore, when the user sits on the toilet seat 10, the user's ischial tuberosity hits the recess of the inner diameter side corner 122, and body pressure from the ischial tuberosity can be dispersed well. In addition, in the embodiment, the cutting angle α when the radius of curvature R of the inner diameter side corner portion 122 takes the maximum value in the radial cross section of the seating surface 12 was set to 153°, but it is larger than 135° and smaller than 180°. The angle may be more preferably greater than 145° and less than 160°, and even more preferably greater than 150° and less than 155°.

As shown in FIG. 13, in the example, the radius of curvature r of the outer corner corner is 7.1 mm (cross section A) at cross sections A to D where the cutting angle is 0°, 45°, 90°, and 135°. They are 7.1 mm (cross section B), 6.2 mm (cross section C), and 2.6 mm (cross section D). The radius of curvature r of the corner on the outer diameter side is 4.1 to 8.5 mm (cross section A), 3.9 to 8.1 mm (cross section B), 4.5 to 6.9 mm (cross section C), taking into account tolerances. ), preferably within the range of 2.8 to 3.1 mm (cross section D).

FIG. 15 is an explanatory diagram showing the body pressure distribution when the same person sits on the toilet seats of the example and the comparative example. Note that FIG. 15(a) shows the body pressure distribution of the toilet seat of the comparative example, and FIG. 15(b) shows the body pressure distribution of the toilet seat of the example. As shown in the figure, it can be seen that in the example, the body pressure concentrated on the ischial tuberosity can be dispersed by supporting the buttocks as a whole, compared to the comparative example. Thereby, in the embodiment, the burden on the user can be reduced and the sitting comfort can be improved.

In the toilet seat 10 of the present embodiment described above, the radius of curvature R of the inner diameter side corner 122 in the radial cross section of the seating surface 12 is the cutting angle when the toilet seat 10 is cut along a vertical plane extending forward from the inner hole center O. When the cutting angle is set to 0°, the maximum value is obtained in the radial cross section when the cutting angle is set to a predetermined angle α greater than 130° and smaller than 180°, and the value becomes smaller as the distance from the predetermined angle α increases. Ru. In addition, the seat angle θ, which is the angle formed with respect to the horizontal line of the straight line connecting the adjacent arc ends of the inner diameter side corner portion 122 and the outer diameter side corner portion 123 in the radial cross section, is in the range of 90° to 180°. , is formed to become larger as the cutting angle becomes larger. As a result, a gentle concavity is formed centered around the portion where the radius of curvature R is maximum at the inner diameter side corner 122 of the seating surface 12, so that when the user sits on the toilet seat 10, the user's ischial tuberosity corresponds to the recess of the inner diameter side corner 122, and the body pressure from the ischial tuberosity can be dispersed well. In addition, since the user's buttocks hit the slope of the seating surface 12 defined by the seat angle θ along the curve of the buttocks, body pressure from the buttocks can be dispersed well. As a result, the body pressure on the ischial tuberosity and buttocks can be dispersed well, and the comfort of sitting can be further improved.

In addition, in the toilet seat 10 of the present embodiment, the seating surface 12 is formed at a substantially constant height from the front end to the position P in a side view when the toilet seat 10 is viewed from the left and right directions, and from the position P to the rear end. It is formed so that it gradually increases in height. Thereby, the toilet seat 10 can be made thinner while setting the radius of curvature R and the seat angle θ to appropriate values according to the cutting angle.

In the toilet seat 10 of this embodiment, the present invention has been described by applying it to an O-shaped toilet seat, but it may also be applied to a U-shaped toilet seat.

The correspondence relationship between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is that the embodiment implements the invention described in the column of means for solving the problem. Since this is an example for specifically explaining a form for solving the problem, it is not intended to limit the elements of the invention described in the column of means for solving the problems. In other words, the interpretation of the invention described in the column of means for solving the problem should be made based on the description in that column, and the embodiments should be based on the description of the invention described in the column of means for solving the problem. This is just one specific example.

Although the mode for implementing the present invention has been described above using the embodiments, the present invention is not limited to these embodiments in any way, and may be modified in various forms without departing from the gist of the present invention. Of course, it can be implemented.

INDUSTRIAL APPLICATION This invention can be utilized for the manufacturing industry of a toilet seat, etc.

10, 10B toilet seat, 11 inner hole, 12 seating surface, 121 upper surface, 122 inner diameter corner, 123 outer diameter corner.

Claims (4)

A toilet seat having a substantially elliptical seating surface,
The inner diameter corner, which is the corner on the inner diameter side in the radial direction of the seating surface, and the outer diameter side corner, which is the corner on the outer diameter side, are obtained by cutting the toilet seat along a vertical plane extending in the radial direction from the center of the inner hole. In the radial cross section, it has a convex arc-shaped outline,
The radius of curvature of the inner corner in the radial cross section is such that the cutting angle is 0° when the toilet seat is cut along a vertical plane extending forward from the center of the inner hole, and the cutting angle is less than 130°. It is formed so that it takes a maximum value in a radial cross section when a predetermined angle is set to be larger than 180°, and becomes smaller as it moves away from the predetermined angle,
In the range of 90° to 180°, the seat angle, which is the angle formed with the horizontal line of the straight line connecting the adjacent circular arc ends of the inner diameter corner and the outer diameter corner in the radial cross section, is within the range of 90° to 180°. formed to become larger as the cutting angle increases,
A toilet seat characterized by: The toilet seat according to claim 1,
The seating surface is formed at a substantially constant height from the front end to a predetermined position in the center, and gradually increases in height from the predetermined position toward the rear end in a side view of the toilet seat from the left and right. It is formed so that
toilet seat. The toilet seat according to claim 1 or 2,
The radius of curvature of the inner corner is 5.7 to 13.6 mm, 5.7 to 18.7 mm, and 3.7 to 3.7 mm in the radial cross section at the cutting angles of 90°, 135°, and 180°, respectively. It is determined within the range of 13.9mm,
The seat surface angles are 4.6 to 14.6 degrees, 12.5 to 19.3 degrees, and 27.4 to 41 degrees in the radial cross section where the cutting angles are 90 degrees, 135 degrees, and 180 degrees, respectively. It is determined within a range of 8°,
The seating surface width, which is the width of the seating surface in the radial direction, is 42.2 to 65.2 mm and 92.7 to 121. 7mm, defined in the range of 26.5 to 31.1mm,
toilet seat. The toilet seat according to claim 3,
The radius of curvature of the inner corner is determined in the range of 5.8 to 10.7 mm and 5.0 to 14.0 mm in the radial cross section at the cutting angle of 0° and 45°, respectively,
The seat angle is determined in the range of 1.4 to 6.0° and 2.3 to 5.5° in the radial cross section where the cutting angle is 0° and 45°, respectively,
The seat width is determined in the range of 23.9 to 41.2 mm and 38.7 to 60.4 mm in the radial cross section where the cutting angle is 0° and 45°, respectively.
toilet seat.

Images