Bathtub washing place drain groove cover
A soft rubber drain cover with an overflow passage efficiently seals and stores hot water on bathroom floor tiles, addressing the inefficiencies of prior designs and enhancing comfort for all users, especially the elderly.
Patent Information
- Application Number
- JP2024119545
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2026-02-05
- Estimated Expiration
- 2044-07-25
AI Technical Summary
Existing drain covers fail to effectively seal and store hot water on bathroom floor tiles, especially for non-flat bathtub drains, leading to inefficiencies and discomfort, particularly for the elderly.
A soft rubber or gel-state rubber drain cover with a rectangular shape and an overflow passage, designed to fit various drain shapes, seals the drain outlet and stores hot water, preventing overflow and heating the floor tiles.
The drain cover efficiently warms the bathroom floor tiles and ambient air, preventing heat shock disorders by effectively sealing and storing hot water, suitable for various drain shapes and structures.
Smart Images

Figure 2026018284000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention is a technical invention relating to a drain cover for a bathtub washing area, and in particular to a drain cover structure that covers the entire drain outlet and stores a certain amount of hot water in the bathtub washing area. [Background technology]
[0002] Generally, home bathrooms are cold, and especially for the elderly, the temperature difference between the inside of the house and the bathroom can often cause a physical disorder called heat shock. As a preventative measure, modern bathrooms are often pre-heated using heaters. However, if you are unable to install a heater, it can be difficult to heat the entire bathroom, and the tiled floors in the bathroom washing area are often particularly cold.
[0003] Sometimes people open the bathtub cover beforehand to warm up the entire bathroom before taking a bath, but the tiles and other floors in the bath area are not heated and remain cold.
[0004] The present invention was developed with the intention of eliminating the coldness of the bathroom washing area and the coldness of the washing area floor tiles, etc., so that everyone, including the elderly, can enter a warm bathroom in peace of mind.
[0005] In response to such demands, various proposals have been made in the prior art, such as those listed below.
[0006] For example, Patent Document 1 (Utility Model Registration No. 3062685) discloses the following technology.
[0007] In other words, this invention discloses the technology of blocking drainage and storing hot water by covering the outer frame 1 of the drain and the drain plug cover 2 with a waterproof drain plugging device made of natural rubber.
[0008] However, the design in Patent Document 1 lacks specificity, specifying only natural rubber as the material, raising questions about the feasibility of completely sealing the drain with water pressure. Even natural rubber may float on water, and there is a high possibility that hot water will drain without being partially sealed. Additionally, because bathtub drains come in a wide variety of shapes and structures, and some are not flat, the design in Patent Document 1 is limited to circular bathtub drains and is therefore limited in size. To accommodate a wide variety of bathtub drain sizes, various molds would be required, which is impractical in terms of cost and workability.
[0009] In other words, the technical disclosure in the above-mentioned document 1 falls far short of solving the problem of the present invention, which aims to enable anyone to easily cover the drain of any type of bathroom washing area, collect a certain amount of hot water on the floor of the washing area, and warm the floor tiles of the washing area and the entire washing area.
[0010] As explained in the above document 1, none of the other documents come close to solving the object and problem of the present invention, and they do not even address the problem of the present application.
[0011] To provide a simple bath washing area drain cover that allows anyone to easily cover the drain outlet of any kind of bath washing area drain, store a certain amount of hot water on the floor of the washing area, and warm the floor tiles of the washing area and the entire washing area, and to develop and inexpensively manufacture and provide such a simple bath washing area drain cover. [Prior art documents] [Patent documents]
[0012] [Patent Document 1] Utility Model Registration No. 3062685 Summary of the Invention [Problem to be solved by the invention]
[0013] The present invention aims to develop and provide a bath washing area drain cover that can be easily used to cover any drain in any bathroom, regardless of its shape and structure, and that can store a certain amount of hot water on the floor of the bath washing area, heating the floor tiles of the washing area and the entire washing area.In addition, the present invention aims to develop and provide a bath washing area drain cover that can overflow hot water from the top surface of the drain cover to the drain outlet when a certain amount of hot water has accumulated on the washing area floor, so that the hot water does not overflow into the changing room, etc., and is an inexpensive product that can be easily used by many people.
[0014] The present invention is intended to solve the problems and issues of the prior art as described above. [Means for solving the problem]
[0015] In order to solve this problem, the bath washing area drain cover of the present invention is a bath washing area drain cover made of soft natural rubber, soft synthetic rubber, or gel-state synthetic rubber in a rectangular three-dimensional shape with a bottom surface large enough to cover the entire bath washing area drain outlet and a thickness (height) of 2 cm to 5 cm, and is characterized by having an overflow drain passage near the center of the top surface that opens all the way to the bottom surface.
[0016] As described above, the bathtub drain cover of the present invention is made of soft natural rubber, soft synthetic rubber, or gel-state synthetic rubber, and has a rectangular three-dimensional shape with a base area large enough to cover the entire drain of various shapes in the bathtub drain, and a thickness of 2 cm to 5 cm, so it can cover the entire bathtub drain. Furthermore, because it is made of soft rubber, it can softly cover the entire drain and tightly fit over the drain, even if the bathtub drain is not flat but has steps. For example, this is similar to tightly fitting a drain with konjac or tofu of the same shape.
[0017] Furthermore, the bath washing area drain cover of the present invention allows hot water to flow into the bath washing area and store the hot water, and by utilizing the water pressure of the hot water, it is possible to further improve the adhesion of the drain to the drain outlet as described above, completely seal the bath washing area's drain outlet, and efficiently store hot water in the washing area. This allows the ambient temperature of the bath washing area to be improved and heated. Similarly, it is possible to efficiently heat the cold floor tiles of the bath washing area.
[0018] As described above, by pre-heating the floor tiles and the atmosphere (air) of the bathroom washing area, it is possible to prevent heat shock disorders that require careful attention when elderly people and others take a bath.
[0019] (Claim 2) Furthermore, the soft synthetic rubber of the bath washing area drain cover of the present invention is silicone rubber, urethane rubber, butadiene rubber, chloroprene rubber, acrylic rubber, fluororubber, nitrile rubber, ethylene propylene rubber, butyl rubber, or styrene butadiene rubber, and is a low hardness rubber with a Shore hardness of A1 to A20, and is characterized by being able to tightly fit and cover the entire bath washing area drain outlet to the shape using water pressure.
[0020] The above-mentioned substances are specifically applicable to soft synthetic rubber, and the substance to be selected may be determined in consideration of the cost of the substance, the cost of production, etc. In addition, the hardness of these soft substances must be soft, ranging from A1 to A20 according to the Shore hardness measurement method specified in standards such as JIS, and preferably very soft, ranging from A1 to A10.
[0021] (Claim 3) The bath washing area drain cover according to the present invention is characterized in that the outer periphery of the overflow drain passage on the bottom surface has an escape groove structure for backflow air from the drain outlet. See Figure 2 for details.
[0022] As mentioned above, the bathtub drain cover of the present invention is designed to cover and seal the entire bathtub drain, so when hot water is poured into the bathtub and stored, there is a risk that too much hot water may be poured, causing the hot water to overflow not only into the bathtub but also into the changing room. To prevent this, the bathtub drain cover of the present invention has an overflow drain passage near the center of the top surface that opens all the way to the bottom. When the depth of the hot water stored in the bathtub reaches the height dimension of the bathtub drain cover of the present invention, the hot water flows into this drain passage as an overflow drain passage and is drained into a conventional bathtub drain.
[0023] Furthermore, the overflow drain passage on the bottom of the bathtub sink drain cover of the present invention has a groove structure for allowing backflow air from the drain outlet to escape during overflow, such as the cross groove structure shown in Figure 2, allowing the overflow water to flow smoothly into the drain. This is also a valuable structure for preventing hot water from overflowing from the bathtub sink. It goes without saying that the groove structure for allowing backflow air is not limited to the cross groove structure shown in Figure 2, but can also be a thin hole structure that penetrates to the top surface of the bathtub sink drain cover of the present invention.
[0024] The structure of the bathtub wash area drain cover according to the present invention has been described above, but various modifications can be made without departing from the spirit of the present invention. However, all suitable forms for each application are included in the technical concept of the present invention. Furthermore, we assert that all equivalent methods using prior art are also included in the technical concept of the present invention. [Effects of the Invention]
[0025] In other words, this invention makes it possible to develop and provide a simple bath washing area drain cover that anyone can easily fit over the drain outlet of any shape of bath washing area drain, sealing the drain outlet and allowing a certain amount of hot water to be stored on the floor of the washing area, warming the floor tiles of the washing area and the entire washing area. Furthermore, this invention also makes it possible to prevent the hot water stored in the washing area from overflowing. In addition, being able to store a certain amount of hot water in the washing area makes it possible to provide a comfortable bath washing area that can be conveniently used for various purposes, such as cleaning the floor tiles of the washing area and cleaning the four corners of the washing area. [Brief explanation of the drawings]
[0026] [Figure 1] FIG. 1 is a perspective conceptual diagram showing an example of the overall image of a drain cover for a bath washing area according to the present invention. [Figure 2] FIG. 1 is a perspective conceptual diagram showing an example of an image of the bottom surface of a drain cover for a bath washing area according to the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0027] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. Note that the scope necessary for the explanation to achieve the object of the present invention will be schematically shown, and the scope necessary for the explanation of the relevant parts of the present invention will be mainly described, and the parts that are omitted from the explanation will be based on publicly known techniques.
[0028] FIG. 1 is a perspective conceptual diagram showing an example of the overall image of a bathtub drain cover according to the present invention. As shown in the figure, the bathtub drain cover according to the present invention has, for example, a roughly rectangular parallelepiped shape, and may have, for example, a two-tiered structure as shown in FIG. 1. The size of the bottom surface area is large enough to cover and seal the drain openings of various bathtub drains. Generally, a size of about 20 cm x 20 cm is sufficient. The height, which is the sum of dimensions A and B as shown in FIG. 1, can be about 3 cm to 5 cm.
[0029] As already mentioned, the bathtub sink drain cover of the present invention is made of soft rubber, so even if the bathtub sink drain is not flat and has steps, it can softly cover the entire drain, tightly covering and sealing the drain. In other words, hot water can be poured into the bathtub sink and stored there, and the water pressure of that hot water can be used to further enhance the above-mentioned adhesion, completely sealing the bathtub sink drain and efficiently storing hot water in the sink. This can improve the ambient temperature of the bathtub sink. Similarly, it can efficiently heat the cold floor tiles in the bathtub sink.
[0030] The overflow drain 2 shown in Figure 1 penetrates all the way to the bottom of the drain cover of the bath washing area of the present invention, and when the amount of hot water stored in the bath washing area reaches a depth exceeding the heights of A and B, it acts as an overflow drain to allow excess hot water to flow into the bath washing area drain. Although the overflow drain 2 is depicted as a rectangular through-hole in Figure 1, it may also be round, and there is no limit to its size. It goes without saying that any through-hole large enough to allow hot water to drain smoothly will suffice.
[0031] Fig. 2 is a perspective conceptual diagram showing an example of an image of the bottom of a drain cover for a bath washing area according to the present invention. Fig. 2 is a perspective view of the drain cover for a bath washing area according to the present invention, viewed from the bottom. As shown in the figure, the overflow drain outlet 2 is depicted on the bottom as an overflow drain outlet 4. Furthermore, the backflow air escape groove structure 5 is depicted as a cross-shaped groove structure in Fig. 2. The presence of this backflow air escape groove structure allows the hot water that overflows and drains to flow smoothly into the drain.
[0032] Although not shown in Figures 1 and 2, the backflow air escape groove structure 5 may be a thin air hole that runs from near the outlet 4 of the overflow drain on the bottom to the top surface of the drain cover of the bath washing area.
[0033] As described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. However, all such modifications are included in the technical concept of the present invention. [Industrial Applicability]
[0034] As described above, the present invention provides a bath washing area drain cover that can be easily fitted to any drain in any bathroom and of any shape and structure, allowing a certain amount of hot water to be stored on the floor of the bath washing area, heating the floor tiles of the washing area and the entire washing area. In addition, a bath washing area drain cover can be provided that, when a certain amount of hot water has accumulated on the washing area floor, allows the hot water to overflow from the top of the drain cover to a drain outlet so that the hot water does not overflow into the changing room, etc.
[0035] Furthermore, the present invention makes it possible to realize a bathtub washing area drain cover that is an inexpensive product that can be easily used by many people.
[0036] In addition, the present invention will be of great benefit to various industries and distribution and sales businesses that use soft synthetic resins as raw materials for bathtub drain covers. [Explanation of symbols]
[0037] 1. Bathroom sink drain cover 2 Overflow drain 3. The bottom of the drain cover in the bathroom 4 Overflow drain outlet 5. Backflow air escape groove structure
Claims
1. A bathtub drain cover made of soft natural rubber, soft synthetic rubber, or gel-state synthetic rubber, in a rectangular three-dimensional shape with a bottom surface that is large enough to cover the entire bathtub drain and a thickness of 2 cm to 5 cm. An overflow drain passage is provided near the center of the top surface, which opens through to the bottom surface. A bathtub washing area drain cover characterized by the above.
2. The soft synthetic rubber is silicone rubber, urethane rubber, butadiene rubber, chloroprene rubber, acrylic rubber, fluororubber, nitrile rubber, ethylene propylene rubber, butyl rubber, or styrene butadiene rubber, and is a low-hardness rubber with a Shore hardness of A1 to A20, and can be fitted to the shape of the entire bathtub washing area drain outlet and tightly covered by water pressure. The bathtub washing area drain cover according to claim 1, characterized in that:
3. The overflow drain passage on the bottom surface has an escape groove structure for backflow air from the drain outlet. The bathtub washing area drain cover according to claim 2, characterized in that:
Citation Information
Patent Citations
Drain plug that warms your feet
JP3062685U