Chairs used in the bathroom
The bathroom chair with a strategically designed groove allows seated cleaning of the anus and surrounding area, addressing the hygiene issue by ensuring thorough water coverage.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-03-19
AI Technical Summary
Existing bathroom chairs do not facilitate washing of the buttocks, especially the anus and surrounding area, requiring users to stand up for cleaning, leading to a decline in personal hygiene practices.
A bathroom chair with a groove extending from the center to the front, featuring a cross-sectional area at the opening that is larger than at the center, an inclination of 5° to 30°, and a width that widens from the center to the opening, allowing hot or cold water to reach and clean the anus and surrounding area while seated.
Enables effective cleaning of the anus and surrounding area while sitting, improving hygiene by ensuring water reaches these areas thoroughly.
Smart Images

Figure 0003255154000001_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a chair used in a bathroom.
Background Art
[0002] It is etiquette to pour hot water on the anus or around the anus before entering the bathtub in the bathroom and then soak in the hot water.
[0003] However, in recent years, the number of people who enter the bathroom and soak in the bathtub without pouring hot water on the anus or around the anus, or without washing their body and pouring hot water on the anus or around the anus, has been increasing.
[0004] When sitting on a chair used for washing the body, it is impossible to wash the anus or around the anus. It is necessary to either stand up or lift the waist once. The increasing number of people who find this operation troublesome is also one of the reasons for the increasing number of people who soak in the bathtub without pouring hot water on the anus or around the anus.
[0005] Japanese Patent No. 6343743 (Patent Document 1) discloses a bathtub chair in which a hollow body for storing hot water having a seating surface for sitting and a hot water injection port is supported by legs. The rear vertical plate portion of the hollow body extends above the seating surface, the hollow body on the rear vertical plate portion side is raised to provide a raised hollow portion, and the injection port is formed in an upper region related to a rear raised vertical plate portion extending upward from the rear vertical plate portion. Further, a discharge port is formed in a lower plate portion constituting the hollow body, and a lid for opening and closing the discharge port is provided. And a roof that slopes downward rearward is provided at an upper edge portion of an opening of the rear raised vertical plate portion forming the injection port. The technology for the bathtub chair is disclosed.
[0006] Also, FIG. 1 of Patent Document 1 discloses a bathtub chair in which a groove is provided forward from a depression in the center of the seating surface.
[0007] Patent Document 1 states that the purpose is to provide a bath chair in which hot water easily comes into contact with the hollow top plate portion of the seating surface to reliably warm the seating surface, makes it difficult for rinse water to enter the hollow body, and furthermore, does not require the hot water stored in the hollow part to be drained after use, but instead automatically drains from the outlet after use.
[0008] In other words, the grooves provided on the seating surface, which are a component of Patent Document 1, are solely for drainage purposes, and there is no concept of using grooves on a bath chair or stool to wash the buttocks, especially the anus or the area around the anus. The technical concept of that patent document is significantly different from that of the present invention.
[0009] Paragraph 0018 of Utility Model Document 2 (Utility Model Registration No. 3109185) states, as the first embodiment, "...and the seat surface 3 is provided with a recess 7 for draining water." Paragraph 0026 states, "In this example, as shown in Figure 3, the front surface 2a of the seat body 1 is concave. By making the front surface 2a of the seat body 1 concave in this way, when a pump-type container 10 for shampoo, etc. is stored in the container storage section 8 on the front surface 2a of the seat body 1, the spout 11 is more likely to protrude from the front surface 2a."
[0010] In other words, the recess in the seat described in utility model document 2 is intended to allow the spout of a pump-type container for draining water from the seat or for shampoo, etc., to protrude easily from the front side when it is stored in the container storage area on the front side of the stool body. There is no idea of washing the buttocks, especially the anus or the area around the anus, from a groove provided in the bath chair or stool, and the technical concept is significantly different from the present invention. [Prior art documents] [Patent Documents]
[0011] [Patent Document 1] Patent No. 6343743 [Patent Document 2] Utility Model Registration No. 3109185 Gazette [Overview of the project] [Problems that the invention aims to solve]
[0012] Because it's impossible to wash the buttocks, especially the anus and surrounding area, while sitting on a chair in the bathroom, requiring one to stand up, some people end up not washing the area that needs to be cleaned the most. There is a need for a chair that allows hot or cold water to reach the buttocks, especially the anus and surrounding area, while seated in the bathroom, enabling proper washing of this area. [Means for solving the problem]
[0013] As a result of diligent research, the inventor has discovered that the above problem can be solved by using a chair with a specific structure for use in a bathroom. In other words, the embodiments of the present invention are as follows.
[0014] [1] A chair for use in a bathroom, characterized in that it has a groove with an opening extending from the center of the seat to the front of the seat, the bottom surface of the groove is inclined downward, the inclination being 5° to 30°, and / or the width of the groove widens from the center of the seat to the opening, the width of the groove at the opening is 0.6 to 10 times the width of the groove in the center of the seat, and the cross-sectional area of the groove at the opening is larger than the cross-sectional area of the groove in the center of the seat. [2] The chair for use in the bathroom according to [1], characterized in that the cross-sectional area of the groove in the opening is 1.1 to 5 times the cross-sectional area of the groove in the center of the seat surface. [3] A chair for use in a bathroom as described in [1] or [2], having a circular depression in the center of the seat, a groove connected to the depression, and a structure such that all hot or cold water accumulated in the depression flows out towards the opening without remaining there. [Effects of the Invention]
[0015] Even while sitting in the chair according to this invention, hot or cold water can reach the buttocks, especially the anus and the area around the anus, making it easy to clean that area. [Brief explanation of the drawing]
[0016] [Figure 1] Bath chair according to Example 1 [Figure 2] Bath chair according to Example 2 [Figure 3] Bath chair according to Example 3 [Figure 4] Bath chair according to Example 4 [Figure 5] Comparative example [Figure 6] Reference example showing the usage state
Mode for carrying out the invention
[0017] A chair or a stool for use in a bathroom, characterized in that it has a groove extending from the central part to the front part, and the cross-sectional area of the groove at the front part of the seat surface is larger than the cross-sectional area of the groove at the central part of the seat surface.
[0018] By making the cross-sectional area of the groove at the opening larger than the cross-sectional area of the groove at the central part of the seat surface, when hot water or the like is poured from the opening, the anus and the surrounding area can be sufficiently filled with hot water.
[0019] As a method of having a groove extending from the central part to the front part and making the cross-sectional area of the groove at the front part of the seat surface larger than the cross-sectional area of the central part of the seat surface, it is characterized in that the groove depth is gradually increased.
[0020] As a method of having a groove extending from the central part to the front part and making the cross-sectional area of the groove at the front part of the seat surface larger than the cross-sectional area of the central part of the seat surface, it is characterized in that the groove width is gradually widened.
[0021] As a method of having a groove extending from the central part to the front part and making the cross-sectional area of the groove at the front part of the seat surface larger than the cross-sectional area of the central part of the seat surface, it is characterized in that both the groove width and the groove depth are gradually changed.
[0022] In this invention, the term "greater than or equal to" in relation to a numerical range is used to mean a certain numerical value or greater than a certain numerical value. For example, "20 mm or more" means 20 mm or greater than 20 mm. Similarly, the term "less than or equal to" in relation to a numerical range is used to mean a certain numerical value or less than a certain numerical value. For example, "25 mm or less" means 25 mm or less than 25 mm.
[0023] A certain number, for example, is a number X, and the range of the original value that is rounded to a certain number X (X-0.5 to X+0.4) is included. For example, if a number X is 1, then 1 includes the range from 0.5 to 1.4.
[0024] In this invention, terms that specify shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are to include not only their strict meanings but also substantially the same conditions. [Examples]
[0025] Example 1 Groove width in the center of the seat: 3cm Groove width of opening: 9cm Groove width at the opening / Groove width in the center: 3 Cross-sectional area 4:9cm2 Cross-sectional area 5:63cm2 Cross-sectional area 5 / cross-sectional area 4:7 Tilt: 30° The hot water from the opening reached the buttocks, anus, and surrounding area sufficiently, providing a thorough cleansing effect. ◎
[0026] Example 2 Groove width in the center of the seat: 10cm Groove width of opening: 6cm Groove width at the opening / Groove width in the center: 0.6 Cross-sectional area 4:10cm2 Cross-sectional area 5:12cm2 Cross-sectional area 5 / cross-sectional area 4:1.2 Tilt: 5° The hot water flowed from the opening to the buttocks, anus, and surrounding area, resulting in a cleansing effect.
[0027] Example 3 Groove width in the center of the seat: 8cm Groove width of opening: 8cm Groove width at the opening / Groove width in the center: 1.0 Cross-sectional area 4:8cm2 Cross-sectional area 5:16cm2 Cross-sectional area 5 / cross-sectional area 4:2.0 Tilt: 5° The hot water flowed from the opening to the buttocks, anus, and surrounding area, resulting in a cleansing effect.
[0028] Example 4 Groove width in the center of the seat: 8cm Groove width of opening: 8cm Groove width at the opening / Groove width in the center: 1.0 Cross-sectional area 4:8cm2 Cross-sectional area 5:24cm2 Cross-sectional area 5 / cross-sectional area 4:3.0 Tilt: 17° The hot water from the opening reached the buttocks, anus, and surrounding area sufficiently, providing a thorough cleansing effect. ◎
[0029] Comparative Example Groove width in the center of the seat: 15cm Groove width of opening: 4.5cm Groove width at the opening / Groove width in the center: 0.3 Cross-sectional area 4:15cm2 Cross-sectional area 5:4.5cm2 Cross-sectional area 5 / cross-sectional area 4:0.3 Tilt: 0° The hot water from the opening did not reach the buttocks, anus, or the area around the anus, resulting in insufficient cleansing effectiveness. [Industrial applicability]
[0030] It is suitable as a chair for use in the bathroom to facilitate washing of the buttocks, anus, or the area around the anus. [Explanation of Symbols]
[0031] 1: Seat of a bath chair 2: Center of the seat 3: Open mouth 4: Cross-sectional area of the groove in the center of the seat 5: Cross-sectional area of the groove at the open opening 6: Groove width 7: Groove depth
Claims
1. A chair for use in a bathroom, characterized by having a groove with an opening extending from the center of the seat to the front of the seat, the bottom surface of the groove being inclined downward, with an inclination of 5° to 30°, and / or the width of the groove widening from the center of the seat to the opening, the width of the groove at the opening being 0.6 to 10 times the width of the groove in the center of the seat, and the cross-sectional area of the groove at the opening being larger than the cross-sectional area of the groove in the center of the seat.
2. The chair for use in a bathroom according to claim 1, characterized in that the cross-sectional area of the groove in the opening is 1.1 to 10 times the cross-sectional area of the groove in the center of the seat surface.
3. A chair for use in a bathroom according to claims 1 to 2, having a circular depression in the center of the seat surface, a groove connected to the depression, and a structure that allows all hot or cold water accumulated in the depression to flow out towards the opening without remaining there.
Citation Information
Patent Citations
Continuous casting method for cast strip
JP1988043743A
stool for bath
JP3109185U