bathtub
By designing a support surface and inclined sides on the inner wall of the bathtub cavity, and providing protrusions on the sides, the muscle fatigue problem caused by traditional bathtubs is solved, achieving better user comfort and relaxation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG LEHUA HOME FURNISHING CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional bathtubs lack ergonomic design, causing muscle fatigue and discomfort for users during prolonged soaking.
The inner wall of a bathtub cavity is designed to include a support surface and an inclined first side surface. The side surface is provided with a protrusion that supports the waist and meets a specific height and angle range, combined with an arc design to enhance user comfort.
By supporting the lower back, it reduces pressure on the hip muscles, decreases lower back fatigue, and improves the user's comfort and relaxation in a semi-reclining position.
Smart Images

Figure CN224330848U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bathroom technology, and in particular to a bathtub. Background Technology
[0002] Bathtubs are primarily used for soaking in the bath. Users often prefer to soak in a semi-reclining position. However, traditional bathtubs, lacking ergonomic design, can easily cause muscle fatigue and discomfort during prolonged soaking, preventing relaxation. Utility Model Content
[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. To this end, the present invention proposes a bathtub.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] According to a first aspect of the present invention, a bathtub includes a tub body. The inner wall of the tub body includes a support surface at the bottom and a first side surface and a second side surface located on opposite sides. The first side surface forms a first included angle with the horizontal direction, which is obtuse, toward the inner cavity. The first side surface is provided with a protrusion protruding toward the inner cavity. The relative height distance between the highest point of the protrusion relative to the first side surface and the lowest point of the support surface is A, which satisfies 10cm≤A≤30cm.
[0006] The bathtub according to the present invention has at least the following beneficial effects: the protrusion can support the user's waist, and the waist support can share the weight of the upper body and reduce the pressure on the buttock muscles. Compared with the traditional flat back bathtub, it can make the waist no longer suspended and can have a fulcrum contact support, reducing waist fatigue and making it more suitable for people who are used to soaking for a long time.
[0007] According to some embodiments of the present invention, the maximum protrusion height of the highest protrusion point of the protrusion relative to the first side surface is B, which satisfies 2cm≤B≤10m.
[0008] According to some embodiments of the present invention, the protrusion is an arc-shaped protrusion, wherein 15cm≤A≤25cm, 3cm≤B≤8cm.
[0009] According to some embodiments of the present invention, the angle of the first included angle is C, which satisfies 110°≤C≤150°.
[0010] According to some embodiments of the present invention, the top of the first side is provided with an arc portion extending in an arc shape in a direction away from the second side, and the radius of the arc portion is D, which satisfies 80mm≤D≤220mm.
[0011] According to some embodiments of the present invention, the second side forms a second included angle with the horizontal direction, which is an obtuse angle toward the inner cavity. The angle of the second included angle is E, which satisfies 85°≤E≤130°.
[0012] According to some embodiments of the present invention, the supporting surface includes a first surface and a second surface. The first surface is connected to the first side surface, and the second surface is connected to the second side surface. The highest point of the second surface is higher than the lowest point of the first surface, and a height difference of size F is formed between the two, which satisfies 4cm≤F≤18cm.
[0013] According to some embodiments of the present invention, the first surface and the second surface are connected by an inclined third surface, which forms a third included angle in the horizontal direction that is obtuse toward the first side surface. The angle of the third included angle is G, which satisfies 125°≤G≤165°.
[0014] According to some embodiments of the present invention, the height difference between the supporting surface and the outer bottom of the cylinder body is no greater than 200mm.
[0015] According to some embodiments of this utility model, a handle and / or control panel are installed on the upper part of the bathtub; wherein,
[0016] The horizontal distance between the highest point of the first side and the handle is H, which satisfies 480mm≤H≤830mm;
[0017] The horizontal distance between the highest point of the first side and the operation panel is J, which satisfies J≤700mm.
[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0020] Figure 1 This is a structural diagram of a bathtub;
[0021] Figure 2 This is a schematic diagram of the internal structure viewed from the right.
[0022] Figure 3 yes Figure 2 A magnified view of a portion of the image;
[0023] Figure 4 yes Figure 1 Top view of the cylinder block.
[0024] Reference numerals: cylinder body 100; inner cavity 110; support surface 200; first surface 210; second surface 220; third surface 230; third included angle 231; first side surface 300; first included angle 310; protrusion 320; highest protrusion point 321; arc 330; second side surface 400; second included angle 410; handle 500; control panel 600; third side surface 710; fourth side surface 720. Detailed Implementation
[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0026] This utility model relates to a bathtub, including a tub body 100.
[0027] like Figure 1 , Figure 2 and Figure 3As shown, the inner cavity 110 of the cylinder 100 is used to store water, allowing users to lie in the inner cavity 110 for bathing. The inner wall of the inner cavity 110 of the cylinder 100 includes a support surface 200, a first side surface 300, and a second side surface 400. The support surface 200 is the bottom surface of the inner cavity 110, and it is mainly used to support the user's lower body, such as the buttocks and legs. The first side surface 300 and the second side surface 400 are the front and rear side walls of the inner cavity 110, respectively. The front side of the support surface 200 connects to the bottom side of the first side surface 300, and the rear side of the support surface 200 connects to the bottom side of the second side surface 400. The cavity also has a third side surface 710 and a fourth side surface 720 distributed to the left and right. The first side surface 300, the second side surface 400, the third side surface 710, and the fourth side surface 720 are sequentially connected to form the circumferential side walls of the inner cavity 110. The support surface 200 can be set as a horizontal surface, or it can be set as a surface that is concave downwards or has other shapes. The first side surface 300 is inclined, forming a first angle 310 with the horizontal direction, and the first angle 310 faces the inner cavity 110. For example, if the support surface 200 is set as a horizontal plane, then the first side surface 300 and the support surface 200 form the first angle 310. The first angle 310 is an obtuse angle, and the angle of the first angle 310 is C. C can be 100°, 105°, 110°, 125°, 130°, 136°, 140°, 143°, 150°, 155°, 160°, etc. Preferably, the angle C of the first angle 310 is in the range of 110°≤C≤150°, and C can be any degree between 110°, 150°, and 110° and 150°. After the user enters the inner cavity 110 of the cylinder 100, the user's buttocks rest on the support surface 200, and the user's back rests on the first side 300. When the first included angle 310 is set within the aforementioned angle range, it can increase the contact area between the user's back and the first side 300 and reduce the pressure on the buttock muscles. Within this angle range, the body's center of gravity can be lowered, reducing the vertical distance between the heart and knees. Combined with the buoyancy of water, this allows the user to approach a floating state, achieving the purpose of relaxation. The first side 300 is provided with a protrusion 320 protruding towards the inner cavity 110. The protrusion 320 can be arc-shaped. The relative height distance A between the highest point 321 of the protrusion 320 and the lowest point of the support surface 200 satisfies 10cm≤A≤30cm. Among them, A can take values such as 10cm, 13cm, 15cm, 18cm, 20cm, 22cm, 25cm, 27cm, 30cm, etc. Preferably, the value of A is in the range of 15cm≤A≤25cm, where A can be 15cm, 25cm, or any value between 15cm and 25cm.It should be noted that the first side 300 is inclined along a straight plane, and the point on the protrusion 320 at the maximum distance from the straight plane on which the first side 300 is located is the highest protrusion point 321 of the protrusion 320 relative to the first side 300. After the user enters the inner cavity 110, the protrusion 320 can support the user's waist during the movement from sitting to semi-reclining. This lumbar support can distribute the weight of the upper body and reduce the pressure on the gluteal muscles. Compared with traditional flat-backed bathtubs, it allows the waist to no longer be suspended and has a fulcrum for support, reducing waist fatigue and making it more suitable for people who are used to soaking for long periods of time.
[0028] Among them, such as Figure 3 As shown, the maximum protrusion height B of the highest protrusion point 321 of the protrusion 320 relative to the first side surface 300 satisfies 2cm ≤ B ≤ 10m. B can be 2cm, 2.5cm, 3cm, 4cm, 4.6cm, 5cm, 5.5cm, 6cm, 6.8cm, 7cm, 8cm, 9cm, 10cm, etc. Preferably, the value of B is in the range of 3cm ≤ B ≤ 8m, that is, B can be 3cm, 8cm, or any value between 3cm and 8cm. Within this range, the protrusion 320 best conforms to the concave position of the user's waist when semi-reclining, is more suitable for the natural shape of the human spine, reduces muscle pressure caused by a flat backrest, allows the body to relax more and approach a natural state, and has a high degree of comfort in supporting the waist.
[0029] In one embodiment, the top of the first side surface 300 is provided with an arc portion 330, which extends in an arc shape away from the second side surface 400. The arc portion 330 may be tangent to the upper part of the first side surface 300. The radius of the arc portion 330 is D, which satisfies 80mm≤D≤220mm. D can take values such as 80mm, 85mm, 90mm, 95mm, 100mm, 106mm, 110mm, 130mm, 145mm, 160mm, 176mm, 185mm, 190mm, 200mm, 210mm, 220mm, etc. When the user leans against the first side surface 300, the user's head tilts back, and the arc portion 330 can support the user's head and neck.
[0030] In one embodiment, the second side surface 400 forms a second included angle 410 in the horizontal direction, which is an obtuse angle toward the inner cavity 110. For example, if the supporting surface 200 is set to a horizontal plane and the second side surface 400 is set at an angle, the second included angle 410 is formed between the second side surface 400 and the supporting surface 200. The angle of the second included angle 410 is E, which satisfies 85°≤E≤130°. E can be 85°, 90°, 95°, 100°, 106°, 110°, 115°, 120°, 130°, etc. The user lies semi-reclined in the cylinder 100, and his / her legs and feet are naturally relaxed under the action of water buoyancy. The feet face the second side surface 400, and the foot can step on the second side surface 400. The second included angle 410, within the above-mentioned angle range, can adapt to the user's ankle opening angle, making the user's feet more comfortable when stepping on the second side surface 400.
[0031] In one embodiment, the support surface 200 includes a first surface 210 and a second surface 220. The first surface 210 is connected to a first side surface 300, and the second surface 220 is connected to a second side surface 400. The first surface 210 and the second surface 220 can be configured as horizontal surfaces, or as inclined surfaces, concave surfaces, etc. The second surface 220 and the first surface 210 have a height difference, with the highest point of the second surface 220 being higher than the lowest point of the first surface 210, and the height difference between the highest point of the second surface 220 and the lowest point of the first surface 210 is F, which satisfies 4cm ≤ F ≤ 18cm. F can take values of 4cm, 5cm, 6cm, 7cm, 8cm, 8.5cm, 9cm, 10cm, 11cm, 12.5cm, 13cm, 14cm, 15cm, etc. The first surface 210 is mainly used to support the user's buttocks, and the second surface 220 is mainly used to support the user's legs. The height difference between the first surface 210 and the second surface 220 restricts the user's hips from sliding from the first side 300 to the second side 400, thus preventing the user from sliding towards the second side 400 when in a semi-reclining position. Simultaneously, the height difference between the second surface 220 and the first surface 210 keeps the knee height as close as possible to the heart height, creating a feeling of suspension. The first surface 210 and the second surface 220 are connected by a tilted third surface 230. The third surface 230 forms a third included angle 231 along the horizontal direction, pointing towards the first side 300 at an obtuse angle. For example, if the first surface 210 is horizontal, the third included angle 231 is formed between the third surface 230 and the first surface 210. The angle of the third included angle 231 is G, which satisfies 125°≤G≤165°, and G can take values such as 125°, 130°, 135°, 140°, 150°, 155°, 160°, and 165°. The third side 230 can provide local support for the user's buttocks and thighs, allowing the user's legs to bend naturally when lying down, making it more comfortable.
[0032] In one embodiment, the height difference between the support surface 200 and the outer bottom of the cylinder body 100 is no greater than 200mm. When a user steps into the inner cavity 110 from the outside of the cylinder body 100, the height difference of less than 200mm is suitable for most people's habits of going up and down stairs, and also provides enough space to accommodate the necessary accessories.
[0033] In one embodiment, such as Figure 4 As shown, a handle 500 and / or control panel 600 are installed on the upper side of the bathtub. The handle 500 and control panel 600 can be located on the left or right side of the bathtub. When the handle 500 is installed, the horizontal distance H between the highest point of the first side 300 and the handle 500 satisfies 480mm ≤ H ≤ 830mm. H can take values such as 480mm, 520mm, 545mm, 560mm, 600mm, 630mm, 680mm, 700mm, 750mm, 800mm, and 830mm. When the user is reclining, their neck or head can rest on the highest point of the first side 300. The handle 500 mainly assists in getting up; the first step is pulling the body upright, and the second step is providing support to stand up. The position of the handle 500 allows the user to easily switch from a reclining to a sitting position by holding the handle 500. During bathtub use, users can rest their hands on the handle 500 for support. When the control panel 600 is installed, the horizontal distance J between the highest point of the first side 300 and the control panel 600 satisfies J≤700mm. The control panel 600 controls the bathtub's spray system, hydro-massage system, etc. This range allows most users to operate the control panel 600 while in a semi-reclined position.
[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0038] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A bathtub, comprising a tub body (100), characterized in that: The inner wall of the inner cavity (110) of the cylinder (100) includes a support surface (200) at the bottom and a first side surface (300) and a second side surface (400) on opposite sides. The first side surface (300) forms a first included angle (310) with the horizontal direction facing the inner cavity (110) and the angle is obtuse. The first side surface (300) is provided with a protrusion (320) protruding towards the inner cavity (110). The relative height distance between the highest point (321) of the protrusion (320) relative to the first side surface (300) and the lowest point of the support surface (200) is A, which satisfies 10cm≤A≤30cm.
2. The bathtub according to claim 1, characterized in that: The maximum protrusion height of the highest protrusion point (321) of the protrusion (320) relative to the first side surface (300) is B, which satisfies 2cm≤B≤10m.
3. The bathtub according to claim 2, characterized in that: The protrusion (320) is an arc-shaped protrusion, wherein 15cm≤A≤25cm and 3cm≤B≤8cm.
4. The bathtub according to claim 1, characterized in that: The angle of the first included angle (310) is C, which satisfies 110°≤C≤150°.
5. The bathtub according to claim 1, characterized in that: The top of the first side (300) is provided with an arc portion (330) extending in an arc shape away from the second side (400), the radius of the arc portion (330) being D, which satisfies 80mm≤D≤220mm.
6. The bathtub according to claim 1, characterized in that: The second side (400) forms a second included angle (410) with the horizontal direction, which is an obtuse angle toward the inner cavity (110). The angle of the second included angle (410) is E, which satisfies 85°≤E≤130°.
7. The bathtub according to claim 1, characterized in that: The support surface (200) includes a first surface (210) and a second surface (220). The first surface (210) is connected to the first side surface (300), and the second surface (220) is connected to the second side surface (400). The highest point of the second surface (220) is higher than the lowest point of the first surface (210), and a height difference of size F is formed between the two, which satisfies 4cm≤F≤18cm.
8. The bathtub according to claim 7, characterized in that: The first surface (210) and the second surface (220) are connected by an inclined third surface (230). The third surface (230) forms a third included angle (231) in the horizontal direction that is obtuse toward the first side surface (300). The angle of the third included angle (231) is G, which satisfies 125°≤G≤165°.
9. The bathtub according to claim 1, characterized in that: The height difference between the support surface (200) and the outer bottom of the cylinder (100) is no greater than 200mm.
10. The bathtub according to claim 1, characterized in that: The upper part of the bathtub is equipped with a handle (500) and / or an operation panel (600); wherein, The horizontal distance between the highest point of the first side (300) and the handle (500) is H, which satisfies 480mm≤H≤830mm; The distance between the highest point of the first side (300) and the operation panel (600) in the horizontal direction is J, which satisfies J≤700mm.